staging: comedi: amplc_dio200: split into ISA, PCI and common
authorIan Abbott <abbotti@mev.co.uk>
Mon, 18 Mar 2013 17:19:09 +0000 (17:19 +0000)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Mon, 25 Mar 2013 18:30:06 +0000 (11:30 -0700)
Split the "amplc_dio200" comedi driver module into separate driver
modules for ISA and PCI boards with a common module for the shared code.

Keep the old name "amplc_dio200" for the ISA board driver as the module
may be modprobed with this name by a script.  (If the script uses insmod
it will need modifying to load the "amplc_dio200_common" module first.)

Use the module name "amplc_dio200_pci" for the PCI board driver.  On
most systems this will be auto-loaded.

Use the module name "amplc_dio200_common" for the module containing the
shared code.  This is normally loaded as a dependency of the other two
modules.

"amplc_dio200_common" exports the following functions:

* `amplc_dio200_common_attach()`: this is basically the old
  `dio200_common_attach()` from the combined driver module.  It is
  called from the driver-specific attach or auto-attach routines.
* `amplc_dio200_common_detach()`: this is most of the old
  `dio200_detach()`.  It is called from the driver-specific detach
  routine.
* `amplc_dio200_set_enhance()`: this is a new function called during
  initialization of PCIe cards to enable "enhanced" mode.

Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/staging/comedi/drivers/Makefile
drivers/staging/comedi/drivers/amplc_dio200.c
drivers/staging/comedi/drivers/amplc_dio200.h [new file with mode: 0644]
drivers/staging/comedi/drivers/amplc_dio200_common.c [new file with mode: 0644]
drivers/staging/comedi/drivers/amplc_dio200_pci.c [new file with mode: 0644]

index 6cdef45..4857d46 100644 (file)
@@ -12,6 +12,7 @@ obj-$(CONFIG_COMEDI_SKEL)             += skel.o
 
 # Comedi ISA drivers
 obj-$(CONFIG_COMEDI_ACL7225B)          += acl7225b.o
+obj-$(CONFIG_COMEDI_AMPLC_DIO200_ISA)  += amplc_dio200.o
 obj-$(CONFIG_COMEDI_PCL711)            += pcl711.o
 obj-$(CONFIG_COMEDI_PCL724)            += pcl724.o
 obj-$(CONFIG_COMEDI_PCL725)            += pcl725.o
@@ -77,7 +78,7 @@ obj-$(CONFIG_COMEDI_ADV_PCI1710)      += adv_pci1710.o
 obj-$(CONFIG_COMEDI_ADV_PCI1723)       += adv_pci1723.o
 obj-$(CONFIG_COMEDI_ADV_PCI1724)       += adv_pci1724.o
 obj-$(CONFIG_COMEDI_ADV_PCI_DIO)       += adv_pci_dio.o
-obj-$(CONFIG_COMEDI_AMPLC_DIO200)      += amplc_dio200.o
+obj-$(CONFIG_COMEDI_AMPLC_DIO200_PCI)  += amplc_dio200_pci.o
 obj-$(CONFIG_COMEDI_AMPLC_PC236)       += amplc_pc236.o
 obj-$(CONFIG_COMEDI_AMPLC_PC263)       += amplc_pc263.o
 obj-$(CONFIG_COMEDI_AMPLC_PCI224)      += amplc_pci224.o
@@ -134,5 +135,6 @@ obj-$(CONFIG_COMEDI_NI_TIOCMD)              += ni_tiocmd.o
 obj-$(CONFIG_COMEDI_NI_LABPC)          += ni_labpc.o
 
 obj-$(CONFIG_COMEDI_8255)              += 8255.o
+obj-$(CONFIG_COMEDI_AMPLC_DIO200)      += amplc_dio200_common.o
 obj-$(CONFIG_COMEDI_DAS08)             += das08.o
 obj-$(CONFIG_COMEDI_FC)                        += comedi_fc.o
index e00dda1..1a562e8 100644 (file)
@@ -1,10 +1,9 @@
 /*
     comedi/drivers/amplc_dio200.c
-    Driver for Amplicon PC272E and PCI272 DIO boards.
-    (Support for other boards in Amplicon 200 series may be added at
-    a later date, e.g. PCI215.)
 
-    Copyright (C) 2005 MEV Ltd. <http://www.mev.co.uk/>
+    Driver for Amplicon PC212E, PC214E, PC215E, PC218E, PC272E.
+
+    Copyright (C) 2005-2013 MEV Ltd. <http://www.mev.co.uk/>
 
     COMEDI - Linux Control and Measurement Device Interface
     Copyright (C) 1998,2000 David A. Schleef <ds@schleef.org>
 */
 /*
  * Driver: amplc_dio200
- * Description: Amplicon 200 Series Digital I/O
+ * Description: Amplicon 200 Series ISA Digital I/O
  * Author: Ian Abbott <abbotti@mev.co.uk>
  * Devices: [Amplicon] PC212E (pc212e), PC214E (pc214e), PC215E (pc215e),
- *   PCI215 (pci215), PCIe215 (pcie215), PC218E (pc218e), PCIe236 (pcie236),
- *   PC272E (pc272e), PCI272 (pci272), PCIe296 (pcie296)
- * Updated: Wed, 24 Oct 2012 16:22:34 +0100
+ *   PC218E (pc218e), PC272E (pc272e)
+ * Updated: Mon, 18 Mar 2013 14:40:41 +0000
+ *
  * Status: works
  *
- * Configuration options - PC212E, PC214E, PC215E, PC218E, PC272E:
+ * Configuration options:
  *   [0] - I/O port base address
  *   [1] - IRQ (optional, but commands won't work without it)
  *
- * Manual configuration of PCI(e) cards is not supported; they are configured
- * automatically.
- *
  * Passing a zero for an option is the same as leaving it unspecified.
  *
  * SUBDEVICES
  *
- *                     PC212E         PC214E      PC215E/PCI215
+ *                     PC212E         PC214E         PC215E
  *                  -------------  -------------  -------------
  *   Subdevices           6              4              5
  *    0                 PPI-X          PPI-X          PPI-X
  *    4                 CTR-Z2                      INTERRUPT
  *    5               INTERRUPT
  *
- *                     PCIe215        PC218E         PCIe236
- *                  -------------  -------------  -------------
- *   Subdevices           8              7              8
- *    0                 PPI-X          CTR-X1         PPI-X
- *    1                 UNUSED         CTR-X2         UNUSED
- *    2                 PPI-Y          CTR-Y1         UNUSED
- *    3                 UNUSED         CTR-Y2         UNUSED
- *    4                 CTR-Z1         CTR-Z1         CTR-Z1
- *    5                 CTR-Z2         CTR-Z2         CTR-Z2
- *    6                 TIMER        INTERRUPT        TIMER
- *    7               INTERRUPT                     INTERRUPT
- *
- *                  PC272E/PCI272     PCIe296
+ *                     PC218E         PC272E
  *                  -------------  -------------
- *   Subdevices           4              8
- *    0                 PPI-X          PPI-X1
- *    1                 PPI-Y          PPI-X2
- *    2                 PPI-Z          PPI-Y1
- *    3               INTERRUPT        PPI-Y2
- *    4                                CTR-Z1
- *    5                                CTR-Z2
- *    6                                TIMER
- *    7                              INTERRUPT
+ *   Subdevices           7              4
+ *    0                 CTR-X1         PPI-X
+ *    1                 CTR-X2         PPI-Y
+ *    2                 CTR-Y1         PPI-Z
+ *    3                 CTR-Y2       INTERRUPT
+ *    4                 CTR-Z1
+ *    5                 CTR-Z2
+ *    6               INTERRUPT
  *
  * Each PPI is a 8255 chip providing 24 DIO channels.  The DIO channels
  * are configurable as inputs or outputs in four groups:
  *         the SK1 connector.  This pin is shared by all three counter
  *         channels on the chip.
  *
- *     For the PCIe boards, clock sources in the range 0 to 31 are allowed
- *     and the following additional clock sources are defined:
- *
- *       8.  HIGH logic level.
- *       9.  LOW logic level.
- *      10.  "Pattern present" signal.
- *      11.  Internal 20 MHz clock.
- *
  *   INSN_CONFIG_GET_CLOCK_SRC.  Returns the counter channel's current
  *     clock source in data[1].  For internal clock sources, data[2] is set
  *     to the period in ns.
  *       6.  Reserved.
  *       7.  Reserved.
  *
- *     For the PCIe boards, gate sources in the range 0 to 31 are allowed;
- *     the following additional clock sources and clock sources 6 and 7 are
- *     (re)defined:
- *
- *       6.  /GAT n, negated version of the counter channel's dedicated
- *         GAT input (negated version of gate source 2).
- *       7.  OUT n-2, the non-inverted output of counter channel n-2
- *         (negated version of gate source 3).
- *       8.  "Pattern present" signal, HIGH while pattern present.
- *       9.  "Pattern occurred" latched signal, latches HIGH when pattern
- *         occurs.
- *      10.  "Pattern gone away" latched signal, latches LOW when pattern
- *         goes away after it occurred.
- *      11.  Negated "pattern present" signal, LOW while pattern present
- *         (negated version of gate source 8).
- *      12.  Negated "pattern occurred" latched signal, latches LOW when
- *         pattern occurs (negated version of gate source 9).
- *      13.  Negated "pattern gone away" latched signal, latches LOW when
- *         pattern goes away after it occurred (negated version of gate
- *         source 10).
- *
  *   INSN_CONFIG_GET_GATE_SRC.  Returns the counter channel's current gate
  *     source in data[2].
  *
  *   3.  The counter subdevices are connected in a ring, so the highest
  *   counter subdevice precedes the lowest.
  *
- * The 'TIMER' subdevice is a free-running 32-bit timer subdevice.
- *
  * The 'INTERRUPT' subdevice pretends to be a digital input subdevice.  The
  * digital inputs come from the interrupt status register.  The number of
  * channels matches the number of interrupt sources.  The PC214E does not
  *
  * INTERRUPT SOURCES
  *
- *                     PC212E         PC214E      PC215E/PCI215
+ *                     PC212E         PC214E         PC215E
  *                  -------------  -------------  -------------
  *   Sources              6              1              6
  *    0               PPI-X-C0       JUMPER-J5      PPI-X-C0
  *    4              CTR-Z1-OUT1                   CTR-Z1-OUT1
  *    5              CTR-Z2-OUT1                   CTR-Z2-OUT1
  *
- *                     PCIe215        PC218E         PCIe236
- *                  -------------  -------------  -------------
- *   Sources              6              6              6
- *    0               PPI-X-C0      CTR-X1-OUT1     PPI-X-C0
- *    1               PPI-X-C3      CTR-X2-OUT1     PPI-X-C3
- *    2               PPI-Y-C0      CTR-Y1-OUT1      unused
- *    3               PPI-Y-C3      CTR-Y2-OUT1      unused
- *    4              CTR-Z1-OUT1    CTR-Z1-OUT1    CTR-Z1-OUT1
- *    5              CTR-Z2-OUT1    CTR-Z2-OUT1    CTR-Z2-OUT1
- *
- *                  PC272E/PCI272     PCIe296
+ *                     PC218E         PC272E
  *                  -------------  -------------
  *   Sources              6              6
- *    0               PPI-X-C0       PPI-X1-C0
- *    1               PPI-X-C3       PPI-X1-C3
- *    2               PPI-Y-C0       PPI-Y1-C0
- *    3               PPI-Y-C3       PPI-Y1-C3
- *    4               PPI-Z-C0      CTR-Z1-OUT1
- *    5               PPI-Z-C3      CTR-Z2-OUT1
+ *    0              CTR-X1-OUT1     PPI-X-C0
+ *    1              CTR-X2-OUT1     PPI-X-C3
+ *    2              CTR-Y1-OUT1     PPI-Y-C0
+ *    3              CTR-Y2-OUT1     PPI-Y-C3
+ *    4              CTR-Z1-OUT1     PPI-Z-C0
+ *    5              CTR-Z2-OUT1     PPI-Z-C3
  *
  * When an interrupt source is enabled in the interrupt source enable
  * register, a rising edge on the source signal latches the corresponding
  *
  * When the interrupt status register value as a whole (actually, just the
  * 6 least significant bits) goes from zero to non-zero, the board will
- * generate an interrupt.  For level-triggered hardware interrupts (PCI
- * card), the interrupt will remain asserted until the interrupt status
- * register is cleared to zero.  For edge-triggered hardware interrupts
- * (ISA card), no further interrupts will occur until the interrupt status
- * register is cleared to zero.  To clear a bit to zero in the interrupt
- * status register, the corresponding interrupt source must be disabled
- * in the interrupt source enable register (there is no separate interrupt
- * clear register).
+ * generate an interrupt.  No further interrupts will occur until the
+ * interrupt status register is cleared to zero.  To clear a bit to zero in
+ * the interrupt status register, the corresponding interrupt source must
+ * be disabled in the interrupt source enable register (there is no
+ * separate interrupt clear register).
  *
  * The PC214E does not have an interrupt source enable register or an
  * interrupt status register; its 'INTERRUPT' subdevice has a single
  * order they appear in the channel list.
  */
 
-#include <linux/pci.h>
-#include <linux/interrupt.h>
 #include <linux/slab.h>
 
 #include "../comedidev.h"
 
-#include "comedi_fc.h"
-#include "8253.h"
-
-#define DO_ISA IS_ENABLED(CONFIG_COMEDI_AMPLC_DIO200_ISA)
-#define DO_PCI IS_ENABLED(CONFIG_COMEDI_AMPLC_DIO200_PCI)
-
-/* PCI IDs */
-#define PCI_DEVICE_ID_AMPLICON_PCI272 0x000a
-#define PCI_DEVICE_ID_AMPLICON_PCI215 0x000b
-#define PCI_DEVICE_ID_AMPLICON_PCIE236 0x0011
-#define PCI_DEVICE_ID_AMPLICON_PCIE215 0x0012
-#define PCI_DEVICE_ID_AMPLICON_PCIE296 0x0014
-
-/* 8255 control register bits */
-#define CR_C_LO_IO     0x01
-#define CR_B_IO                0x02
-#define CR_B_MODE      0x04
-#define CR_C_HI_IO     0x08
-#define CR_A_IO                0x10
-#define CR_A_MODE(a)   ((a)<<5)
-#define CR_CW          0x80
-
-/* 200 series registers */
-#define DIO200_IO_SIZE         0x20
-#define DIO200_PCIE_IO_SIZE    0x4000
-#define DIO200_XCLK_SCE                0x18    /* Group X clock selection register */
-#define DIO200_YCLK_SCE                0x19    /* Group Y clock selection register */
-#define DIO200_ZCLK_SCE                0x1a    /* Group Z clock selection register */
-#define DIO200_XGAT_SCE                0x1b    /* Group X gate selection register */
-#define DIO200_YGAT_SCE                0x1c    /* Group Y gate selection register */
-#define DIO200_ZGAT_SCE                0x1d    /* Group Z gate selection register */
-#define DIO200_INT_SCE         0x1e    /* Interrupt enable/status register */
-/* Extra registers for new PCIe boards */
-#define DIO200_ENHANCE         0x20    /* 1 to enable enhanced features */
-#define DIO200_VERSION         0x24    /* Hardware version register */
-#define DIO200_TS_CONFIG       0x600   /* Timestamp timer config register */
-#define DIO200_TS_COUNT                0x602   /* Timestamp timer count register */
-
-/*
- * Functions for constructing value for DIO_200_?CLK_SCE and
- * DIO_200_?GAT_SCE registers:
- *
- * 'which' is: 0 for CTR-X1, CTR-Y1, CTR-Z1; 1 for CTR-X2, CTR-Y2 or CTR-Z2.
- * 'chan' is the channel: 0, 1 or 2.
- * 'source' is the signal source: 0 to 7, or 0 to 31 for "enhanced" boards.
- */
-static unsigned char clk_gat_sce(unsigned int which, unsigned int chan,
-                                unsigned int source)
-{
-       return (which << 5) | (chan << 3) |
-              ((source & 030) << 3) | (source & 007);
-}
-
-static unsigned char clk_sce(unsigned int which, unsigned int chan,
-                            unsigned int source)
-{
-       return clk_gat_sce(which, chan, source);
-}
-
-static unsigned char gat_sce(unsigned int which, unsigned int chan,
-                            unsigned int source)
-{
-       return clk_gat_sce(which, chan, source);
-}
-
-/*
- * Periods of the internal clock sources in nanoseconds.
- */
-static const unsigned int clock_period[32] = {
-       [1] = 100,              /* 10 MHz */
-       [2] = 1000,             /* 1 MHz */
-       [3] = 10000,            /* 100 kHz */
-       [4] = 100000,           /* 10 kHz */
-       [5] = 1000000,          /* 1 kHz */
-       [11] = 50,              /* 20 MHz (enhanced boards) */
-       /* clock sources 12 and later reserved for enhanced boards */
-};
-
-/*
- * Timestamp timer configuration register (for new PCIe boards).
- */
-#define TS_CONFIG_RESET                0x100   /* Reset counter to zero. */
-#define TS_CONFIG_CLK_SRC_MASK 0x0FF   /* Clock source. */
-#define TS_CONFIG_MAX_CLK_SRC  2       /* Maximum clock source value. */
-
-/*
- * Periods of the timestamp timer clock sources in nanoseconds.
- */
-static const unsigned int ts_clock_period[TS_CONFIG_MAX_CLK_SRC + 1] = {
-       1,                      /* 1 nanosecond (but with 20 ns granularity). */
-       1000,                   /* 1 microsecond. */
-       1000000,                /* 1 millisecond. */
-};
-
-/*
- * Register region.
- */
-enum dio200_regtype { no_regtype = 0, io_regtype, mmio_regtype };
-struct dio200_region {
-       union {
-               unsigned long iobase;           /* I/O base address */
-               unsigned char __iomem *membase; /* mapped MMIO base address */
-       } u;
-       enum dio200_regtype regtype;
-};
-
-/*
- * Subdevice types.
- */
-enum dio200_sdtype { sd_none, sd_intr, sd_8255, sd_8254, sd_timer };
-
-#define DIO200_MAX_SUBDEVS     8
-#define DIO200_MAX_ISNS                6
-
-struct dio200_layout {
-       unsigned short n_subdevs;       /* number of subdevices */
-       unsigned char sdtype[DIO200_MAX_SUBDEVS];       /* enum dio200_sdtype */
-       unsigned char sdinfo[DIO200_MAX_SUBDEVS];       /* depends on sdtype */
-       bool has_int_sce:1;             /* has interrupt enable/status reg */
-       bool has_clk_gat_sce:1;         /* has clock/gate selection registers */
-       bool has_enhancements:1;        /* has enhanced features */
-};
+#include "amplc_dio200.h"
 
 /*
  * Board descriptions.
  */
-
-enum dio200_bustype { isa_bustype, pci_bustype };
-
-enum dio200_pci_model {
-       pci215_model,
-       pci272_model,
-       pcie215_model,
-       pcie236_model,
-       pcie296_model
-};
-
-struct dio200_board {
-       const char *name;
-       struct dio200_layout layout;
-       enum dio200_bustype bustype;
-       unsigned char mainbar;
-       unsigned char mainshift;
-       unsigned int mainsize;
-};
-
-#if DO_ISA
 static const struct dio200_board dio200_isa_boards[] = {
        {
                .name = "pc212e",
@@ -472,207 +267,6 @@ static const struct dio200_board dio200_isa_boards[] = {
                },
        },
 };
-#endif
-
-#if DO_PCI
-static const struct dio200_board dio200_pci_boards[] = {
-       [pci215_model] {
-               .name = "pci215",
-               .bustype = pci_bustype,
-               .mainbar = 2,
-               .mainsize = DIO200_IO_SIZE,
-               .layout = {
-                       .n_subdevs = 5,
-                       .sdtype = {sd_8255, sd_8255, sd_8254, sd_8254, sd_intr},
-                       .sdinfo = {0x00, 0x08, 0x10, 0x14, 0x3F},
-                       .has_int_sce = true,
-                       .has_clk_gat_sce = true,
-               },
-       },
-       [pci272_model] {
-               .name = "pci272",
-               .bustype = pci_bustype,
-               .mainbar = 2,
-               .mainsize = DIO200_IO_SIZE,
-               .layout = {
-                       .n_subdevs = 4,
-                       .sdtype = {sd_8255, sd_8255, sd_8255, sd_intr},
-                       .sdinfo = {0x00, 0x08, 0x10, 0x3F},
-                       .has_int_sce = true,
-               },
-       },
-       [pcie215_model] {
-               .name = "pcie215",
-               .bustype = pci_bustype,
-               .mainbar = 1,
-               .mainshift = 3,
-               .mainsize = DIO200_PCIE_IO_SIZE,
-               .layout = {
-                       .n_subdevs = 8,
-                       .sdtype = {sd_8255, sd_none, sd_8255, sd_none,
-                                  sd_8254, sd_8254, sd_timer, sd_intr},
-                       .sdinfo = {0x00, 0x00, 0x08, 0x00,
-                                  0x10, 0x14, 0x00, 0x3F},
-                       .has_int_sce = true,
-                       .has_clk_gat_sce = true,
-                       .has_enhancements = true,
-               },
-       },
-       [pcie236_model] {
-               .name = "pcie236",
-               .bustype = pci_bustype,
-               .mainbar = 1,
-               .mainshift = 3,
-               .mainsize = DIO200_PCIE_IO_SIZE,
-               .layout = {
-                       .n_subdevs = 8,
-                       .sdtype = {sd_8255, sd_none, sd_none, sd_none,
-                                  sd_8254, sd_8254, sd_timer, sd_intr},
-                       .sdinfo = {0x00, 0x00, 0x00, 0x00,
-                                  0x10, 0x14, 0x00, 0x3F},
-                       .has_int_sce = true,
-                       .has_clk_gat_sce = true,
-                       .has_enhancements = true,
-               },
-       },
-       [pcie296_model] {
-               .name = "pcie296",
-               .bustype = pci_bustype,
-               .mainbar = 1,
-               .mainshift = 3,
-               .mainsize = DIO200_PCIE_IO_SIZE,
-               .layout = {
-                       .n_subdevs = 8,
-                       .sdtype = {sd_8255, sd_8255, sd_8255, sd_8255,
-                                  sd_8254, sd_8254, sd_timer, sd_intr},
-                       .sdinfo = {0x00, 0x04, 0x08, 0x0C,
-                                  0x10, 0x14, 0x00, 0x3F},
-                       .has_int_sce = true,
-                       .has_clk_gat_sce = true,
-                       .has_enhancements = true,
-               },
-       },
-};
-#endif
-
-/* this structure is for data unique to this hardware driver.  If
-   several hardware drivers keep similar information in this structure,
-   feel free to suggest moving the variable to the struct comedi_device struct.
- */
-struct dio200_private {
-       struct dio200_region io;        /* Register region */
-       int intr_sd;
-};
-
-struct dio200_subdev_8254 {
-       unsigned int ofs;               /* Counter base offset */
-       unsigned int clk_sce_ofs;       /* CLK_SCE base address */
-       unsigned int gat_sce_ofs;       /* GAT_SCE base address */
-       int which;                      /* Bit 5 of CLK_SCE or GAT_SCE */
-       unsigned int clock_src[3];      /* Current clock sources */
-       unsigned int gate_src[3];       /* Current gate sources */
-       spinlock_t spinlock;
-};
-
-struct dio200_subdev_8255 {
-       unsigned int ofs;               /* DIO base offset */
-};
-
-struct dio200_subdev_intr {
-       spinlock_t spinlock;
-       unsigned int ofs;
-       unsigned int valid_isns;
-       unsigned int enabled_isns;
-       unsigned int stopcount;
-       bool active:1;
-       bool continuous:1;
-};
-
-static inline const struct dio200_layout *
-dio200_board_layout(const struct dio200_board *board)
-{
-       return &board->layout;
-}
-
-static inline const struct dio200_layout *
-dio200_dev_layout(struct comedi_device *dev)
-{
-       return dio200_board_layout(comedi_board(dev));
-}
-
-static inline bool is_pci_board(const struct dio200_board *board)
-{
-       return DO_PCI && board->bustype == pci_bustype;
-}
-
-static inline bool is_isa_board(const struct dio200_board *board)
-{
-       return DO_ISA && board->bustype == isa_bustype;
-}
-
-/*
- * Read 8-bit register.
- */
-static unsigned char dio200_read8(struct comedi_device *dev,
-                                 unsigned int offset)
-{
-       const struct dio200_board *thisboard = comedi_board(dev);
-       struct dio200_private *devpriv = dev->private;
-
-       offset <<= thisboard->mainshift;
-       if (devpriv->io.regtype == io_regtype)
-               return inb(devpriv->io.u.iobase + offset);
-       else
-               return readb(devpriv->io.u.membase + offset);
-}
-
-/*
- * Write 8-bit register.
- */
-static void dio200_write8(struct comedi_device *dev, unsigned int offset,
-                         unsigned char val)
-{
-       const struct dio200_board *thisboard = comedi_board(dev);
-       struct dio200_private *devpriv = dev->private;
-
-       offset <<= thisboard->mainshift;
-       if (devpriv->io.regtype == io_regtype)
-               outb(val, devpriv->io.u.iobase + offset);
-       else
-               writeb(val, devpriv->io.u.membase + offset);
-}
-
-/*
- * Read 32-bit register.
- */
-static unsigned int dio200_read32(struct comedi_device *dev,
-                                 unsigned int offset)
-{
-       const struct dio200_board *thisboard = comedi_board(dev);
-       struct dio200_private *devpriv = dev->private;
-
-       offset <<= thisboard->mainshift;
-       if (devpriv->io.regtype == io_regtype)
-               return inl(devpriv->io.u.iobase + offset);
-       else
-               return readl(devpriv->io.u.membase + offset);
-}
-
-/*
- * Write 32-bit register.
- */
-static void dio200_write32(struct comedi_device *dev, unsigned int offset,
-                          unsigned int val)
-{
-       const struct dio200_board *thisboard = comedi_board(dev);
-       struct dio200_private *devpriv = dev->private;
-
-       offset <<= thisboard->mainshift;
-       if (devpriv->io.regtype == io_regtype)
-               outl(val, devpriv->io.u.iobase + offset);
-       else
-               writel(val, devpriv->io.u.membase + offset);
-}
 
 /*
  * This function checks and requests an I/O region, reporting an error
@@ -690,1296 +284,56 @@ dio200_request_region(struct comedi_device *dev,
        return 0;
 }
 
-/*
- * 'insn_bits' function for an 'INTERRUPT' subdevice.
- */
-static int
-dio200_subdev_intr_insn_bits(struct comedi_device *dev,
-                            struct comedi_subdevice *s,
-                            struct comedi_insn *insn, unsigned int *data)
-{
-       const struct dio200_layout *layout = dio200_dev_layout(dev);
-       struct dio200_subdev_intr *subpriv = s->private;
-
-       if (layout->has_int_sce) {
-               /* Just read the interrupt status register.  */
-               data[1] = dio200_read8(dev, subpriv->ofs) & subpriv->valid_isns;
-       } else {
-               /* No interrupt status register. */
-               data[0] = 0;
-       }
-
-       return insn->n;
-}
-
-/*
- * Called to stop acquisition for an 'INTERRUPT' subdevice.
- */
-static void dio200_stop_intr(struct comedi_device *dev,
-                            struct comedi_subdevice *s)
-{
-       const struct dio200_layout *layout = dio200_dev_layout(dev);
-       struct dio200_subdev_intr *subpriv = s->private;
-
-       subpriv->active = false;
-       subpriv->enabled_isns = 0;
-       if (layout->has_int_sce)
-               dio200_write8(dev, subpriv->ofs, 0);
-}
-
-/*
- * Called to start acquisition for an 'INTERRUPT' subdevice.
- */
-static int dio200_start_intr(struct comedi_device *dev,
-                            struct comedi_subdevice *s)
-{
-       unsigned int n;
-       unsigned isn_bits;
-       const struct dio200_layout *layout = dio200_dev_layout(dev);
-       struct dio200_subdev_intr *subpriv = s->private;
-       struct comedi_cmd *cmd = &s->async->cmd;
-       int retval = 0;
-
-       if (!subpriv->continuous && subpriv->stopcount == 0) {
-               /* An empty acquisition! */
-               s->async->events |= COMEDI_CB_EOA;
-               subpriv->active = false;
-               retval = 1;
-       } else {
-               /* Determine interrupt sources to enable. */
-               isn_bits = 0;
-               if (cmd->chanlist) {
-                       for (n = 0; n < cmd->chanlist_len; n++)
-                               isn_bits |= (1U << CR_CHAN(cmd->chanlist[n]));
-               }
-               isn_bits &= subpriv->valid_isns;
-               /* Enable interrupt sources. */
-               subpriv->enabled_isns = isn_bits;
-               if (layout->has_int_sce)
-                       dio200_write8(dev, subpriv->ofs, isn_bits);
-       }
-
-       return retval;
-}
-
-/*
- * Internal trigger function to start acquisition for an 'INTERRUPT' subdevice.
- */
-static int
-dio200_inttrig_start_intr(struct comedi_device *dev, struct comedi_subdevice *s,
-                         unsigned int trignum)
-{
-       struct dio200_subdev_intr *subpriv;
-       unsigned long flags;
-       int event = 0;
-
-       if (trignum != 0)
-               return -EINVAL;
-
-       subpriv = s->private;
-
-       spin_lock_irqsave(&subpriv->spinlock, flags);
-       s->async->inttrig = NULL;
-       if (subpriv->active)
-               event = dio200_start_intr(dev, s);
-
-       spin_unlock_irqrestore(&subpriv->spinlock, flags);
-
-       if (event)
-               comedi_event(dev, s);
-
-       return 1;
-}
-
-static void dio200_read_scan_intr(struct comedi_device *dev,
-                                 struct comedi_subdevice *s,
-                                 unsigned int triggered)
-{
-       struct dio200_subdev_intr *subpriv = s->private;
-       unsigned short val;
-       unsigned int n, ch, len;
-
-       val = 0;
-       len = s->async->cmd.chanlist_len;
-       for (n = 0; n < len; n++) {
-               ch = CR_CHAN(s->async->cmd.chanlist[n]);
-               if (triggered & (1U << ch))
-                       val |= (1U << n);
-       }
-       /* Write the scan to the buffer. */
-       if (comedi_buf_put(s->async, val)) {
-               s->async->events |= (COMEDI_CB_BLOCK | COMEDI_CB_EOS);
-       } else {
-               /* Error!  Stop acquisition.  */
-               dio200_stop_intr(dev, s);
-               s->async->events |= COMEDI_CB_ERROR | COMEDI_CB_OVERFLOW;
-               comedi_error(dev, "buffer overflow");
-       }
-
-       /* Check for end of acquisition. */
-       if (!subpriv->continuous) {
-               /* stop_src == TRIG_COUNT */
-               if (subpriv->stopcount > 0) {
-                       subpriv->stopcount--;
-                       if (subpriv->stopcount == 0) {
-                               s->async->events |= COMEDI_CB_EOA;
-                               dio200_stop_intr(dev, s);
-                       }
-               }
-       }
-}
-
-/*
- * This is called from the interrupt service routine to handle a read
- * scan on an 'INTERRUPT' subdevice.
- */
-static int dio200_handle_read_intr(struct comedi_device *dev,
-                                  struct comedi_subdevice *s)
-{
-       const struct dio200_layout *layout = dio200_dev_layout(dev);
-       struct dio200_subdev_intr *subpriv = s->private;
-       unsigned triggered;
-       unsigned intstat;
-       unsigned cur_enabled;
-       unsigned int oldevents;
-       unsigned long flags;
-
-       triggered = 0;
-
-       spin_lock_irqsave(&subpriv->spinlock, flags);
-       oldevents = s->async->events;
-       if (layout->has_int_sce) {
-               /*
-                * Collect interrupt sources that have triggered and disable
-                * them temporarily.  Loop around until no extra interrupt
-                * sources have triggered, at which point, the valid part of
-                * the interrupt status register will read zero, clearing the
-                * cause of the interrupt.
-                *
-                * Mask off interrupt sources already seen to avoid infinite
-                * loop in case of misconfiguration.
-                */
-               cur_enabled = subpriv->enabled_isns;
-               while ((intstat = (dio200_read8(dev, subpriv->ofs) &
-                                  subpriv->valid_isns & ~triggered)) != 0) {
-                       triggered |= intstat;
-                       cur_enabled &= ~triggered;
-                       dio200_write8(dev, subpriv->ofs, cur_enabled);
-               }
-       } else {
-               /*
-                * No interrupt status register.  Assume the single interrupt
-                * source has triggered.
-                */
-               triggered = subpriv->enabled_isns;
-       }
-
-       if (triggered) {
-               /*
-                * Some interrupt sources have triggered and have been
-                * temporarily disabled to clear the cause of the interrupt.
-                *
-                * Reenable them NOW to minimize the time they are disabled.
-                */
-               cur_enabled = subpriv->enabled_isns;
-               if (layout->has_int_sce)
-                       dio200_write8(dev, subpriv->ofs, cur_enabled);
-
-               if (subpriv->active) {
-                       /*
-                        * The command is still active.
-                        *
-                        * Ignore interrupt sources that the command isn't
-                        * interested in (just in case there's a race
-                        * condition).
-                        */
-                       if (triggered & subpriv->enabled_isns)
-                               /* Collect scan data. */
-                               dio200_read_scan_intr(dev, s, triggered);
-               }
-       }
-       spin_unlock_irqrestore(&subpriv->spinlock, flags);
-
-       if (oldevents != s->async->events)
-               comedi_event(dev, s);
-
-       return (triggered != 0);
-}
-
-/*
- * 'cancel' function for an 'INTERRUPT' subdevice.
- */
-static int dio200_subdev_intr_cancel(struct comedi_device *dev,
-                                    struct comedi_subdevice *s)
+static int dio200_attach(struct comedi_device *dev, struct comedi_devconfig *it)
 {
-       struct dio200_subdev_intr *subpriv = s->private;
-       unsigned long flags;
+       const struct dio200_board *thisboard = comedi_board(dev);
+       struct dio200_private *devpriv;
+       unsigned long iobase;
+       unsigned int irq;
+       int ret;
 
-       spin_lock_irqsave(&subpriv->spinlock, flags);
-       if (subpriv->active)
-               dio200_stop_intr(dev, s);
+       dev->board_name = thisboard->name;
+       iobase = it->options[0];
+       irq = it->options[1];
+       dev_info(dev->class_dev, "%s: attach %s 0x%lX,%u\n",
+                dev->driver->driver_name, dev->board_name, iobase, irq);
 
-       spin_unlock_irqrestore(&subpriv->spinlock, flags);
+       devpriv = kzalloc(sizeof(*devpriv), GFP_KERNEL);
+       if (!devpriv)
+               return -ENOMEM;
+       dev->private = devpriv;
 
-       return 0;
+       ret = dio200_request_region(dev, iobase, thisboard->mainsize);
+       if (ret < 0)
+               return ret;
+       devpriv->io.u.iobase = iobase;
+       devpriv->io.regtype = io_regtype;
+       return amplc_dio200_common_attach(dev, irq, 0);
 }
 
-/*
- * 'do_cmdtest' function for an 'INTERRUPT' subdevice.
- */
-static int
-dio200_subdev_intr_cmdtest(struct comedi_device *dev,
-                          struct comedi_subdevice *s, struct comedi_cmd *cmd)
+static void dio200_detach(struct comedi_device *dev)
 {
-       int err = 0;
-
-       /* Step 1 : check if triggers are trivially valid */
-
-       err |= cfc_check_trigger_src(&cmd->start_src, TRIG_NOW | TRIG_INT);
-       err |= cfc_check_trigger_src(&cmd->scan_begin_src, TRIG_EXT);
-       err |= cfc_check_trigger_src(&cmd->convert_src, TRIG_NOW);
-       err |= cfc_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT);
-       err |= cfc_check_trigger_src(&cmd->stop_src, TRIG_COUNT | TRIG_NONE);
-
-       if (err)
-               return 1;
-
-       /* Step 2a : make sure trigger sources are unique */
-
-       err |= cfc_check_trigger_is_unique(cmd->start_src);
-       err |= cfc_check_trigger_is_unique(cmd->stop_src);
-
-       /* Step 2b : and mutually compatible */
-
-       if (err)
-               return 2;
-
-       /* Step 3: check if arguments are trivially valid */
-
-       err |= cfc_check_trigger_arg_is(&cmd->start_arg, 0);
-       err |= cfc_check_trigger_arg_is(&cmd->scan_begin_arg, 0);
-       err |= cfc_check_trigger_arg_is(&cmd->convert_arg, 0);
-       err |= cfc_check_trigger_arg_is(&cmd->scan_end_arg, cmd->chanlist_len);
-
-       switch (cmd->stop_src) {
-       case TRIG_COUNT:
-               /* any count allowed */
-               break;
-       case TRIG_NONE:
-               err |= cfc_check_trigger_arg_is(&cmd->stop_arg, 0);
-               break;
-       default:
-               break;
-       }
-
-       if (err)
-               return 3;
-
-       /* step 4: fix up any arguments */
-
-       /* if (err) return 4; */
+       const struct dio200_board *thisboard = comedi_board(dev);
+       struct dio200_private *devpriv = dev->private;
 
-       return 0;
+       if (!thisboard || !devpriv)
+               return;
+       amplc_dio200_common_detach(dev);
+       if (devpriv->io.regtype == io_regtype)
+               release_region(devpriv->io.u.iobase, thisboard->mainsize);
 }
 
-/*
- * 'do_cmd' function for an 'INTERRUPT' subdevice.
- */
-static int dio200_subdev_intr_cmd(struct comedi_device *dev,
-                                 struct comedi_subdevice *s)
-{
-       struct comedi_cmd *cmd = &s->async->cmd;
-       struct dio200_subdev_intr *subpriv = s->private;
-       unsigned long flags;
-       int event = 0;
-
-       spin_lock_irqsave(&subpriv->spinlock, flags);
-       subpriv->active = 1;
-
-       /* Set up end of acquisition. */
-       switch (cmd->stop_src) {
-       case TRIG_COUNT:
-               subpriv->continuous = false;
-               subpriv->stopcount = cmd->stop_arg;
-               break;
-       default:
-               /* TRIG_NONE */
-               subpriv->continuous = true;
-               subpriv->stopcount = 0;
-               break;
-       }
-
-       /* Set up start of acquisition. */
-       switch (cmd->start_src) {
-       case TRIG_INT:
-               s->async->inttrig = dio200_inttrig_start_intr;
-               break;
-       default:
-               /* TRIG_NOW */
-               event = dio200_start_intr(dev, s);
-               break;
-       }
-       spin_unlock_irqrestore(&subpriv->spinlock, flags);
-
-       if (event)
-               comedi_event(dev, s);
-
-       return 0;
-}
-
-/*
- * This function initializes an 'INTERRUPT' subdevice.
- */
-static int
-dio200_subdev_intr_init(struct comedi_device *dev, struct comedi_subdevice *s,
-                       unsigned int offset, unsigned valid_isns)
-{
-       const struct dio200_layout *layout = dio200_dev_layout(dev);
-       struct dio200_subdev_intr *subpriv;
-
-       subpriv = kzalloc(sizeof(*subpriv), GFP_KERNEL);
-       if (!subpriv)
-               return -ENOMEM;
-
-       subpriv->ofs = offset;
-       subpriv->valid_isns = valid_isns;
-       spin_lock_init(&subpriv->spinlock);
-
-       if (layout->has_int_sce)
-               /* Disable interrupt sources. */
-               dio200_write8(dev, subpriv->ofs, 0);
-
-       s->private = subpriv;
-       s->type = COMEDI_SUBD_DI;
-       s->subdev_flags = SDF_READABLE | SDF_CMD_READ;
-       if (layout->has_int_sce) {
-               s->n_chan = DIO200_MAX_ISNS;
-               s->len_chanlist = DIO200_MAX_ISNS;
-       } else {
-               /* No interrupt source register.  Support single channel. */
-               s->n_chan = 1;
-               s->len_chanlist = 1;
-       }
-       s->range_table = &range_digital;
-       s->maxdata = 1;
-       s->insn_bits = dio200_subdev_intr_insn_bits;
-       s->do_cmdtest = dio200_subdev_intr_cmdtest;
-       s->do_cmd = dio200_subdev_intr_cmd;
-       s->cancel = dio200_subdev_intr_cancel;
-
-       return 0;
-}
-
-/*
- * This function cleans up an 'INTERRUPT' subdevice.
- */
-static void
-dio200_subdev_intr_cleanup(struct comedi_device *dev,
-                          struct comedi_subdevice *s)
-{
-       struct dio200_subdev_intr *subpriv = s->private;
-       kfree(subpriv);
-}
-
-/*
- * Interrupt service routine.
- */
-static irqreturn_t dio200_interrupt(int irq, void *d)
-{
-       struct comedi_device *dev = d;
-       struct dio200_private *devpriv = dev->private;
-       struct comedi_subdevice *s;
-       int handled;
-
-       if (!dev->attached)
-               return IRQ_NONE;
-
-       if (devpriv->intr_sd >= 0) {
-               s = &dev->subdevices[devpriv->intr_sd];
-               handled = dio200_handle_read_intr(dev, s);
-       } else {
-               handled = 0;
-       }
-
-       return IRQ_RETVAL(handled);
-}
-
-/*
- * Read an '8254' counter subdevice channel.
- */
-static unsigned int
-dio200_subdev_8254_read_chan(struct comedi_device *dev,
-                            struct comedi_subdevice *s, unsigned int chan)
-{
-       struct dio200_subdev_8254 *subpriv = s->private;
-       unsigned int val;
-
-       /* latch counter */
-       val = chan << 6;
-       dio200_write8(dev, subpriv->ofs + i8254_control_reg, val);
-       /* read lsb, msb */
-       val = dio200_read8(dev, subpriv->ofs + chan);
-       val += dio200_read8(dev, subpriv->ofs + chan) << 8;
-       return val;
-}
-
-/*
- * Write an '8254' subdevice channel.
- */
-static void
-dio200_subdev_8254_write_chan(struct comedi_device *dev,
-                             struct comedi_subdevice *s, unsigned int chan,
-                             unsigned int count)
-{
-       struct dio200_subdev_8254 *subpriv = s->private;
-
-       /* write lsb, msb */
-       dio200_write8(dev, subpriv->ofs + chan, count & 0xff);
-       dio200_write8(dev, subpriv->ofs + chan, (count >> 8) & 0xff);
-}
-
-/*
- * Set mode of an '8254' subdevice channel.
- */
-static void
-dio200_subdev_8254_set_mode(struct comedi_device *dev,
-                           struct comedi_subdevice *s, unsigned int chan,
-                           unsigned int mode)
-{
-       struct dio200_subdev_8254 *subpriv = s->private;
-       unsigned int byte;
-
-       byte = chan << 6;
-       byte |= 0x30;           /* access order: lsb, msb */
-       byte |= (mode & 0xf);   /* counter mode and BCD|binary */
-       dio200_write8(dev, subpriv->ofs + i8254_control_reg, byte);
-}
-
-/*
- * Read status byte of an '8254' counter subdevice channel.
- */
-static unsigned int
-dio200_subdev_8254_status(struct comedi_device *dev,
-                         struct comedi_subdevice *s, unsigned int chan)
-{
-       struct dio200_subdev_8254 *subpriv = s->private;
-
-       /* latch status */
-       dio200_write8(dev, subpriv->ofs + i8254_control_reg,
-                     0xe0 | (2 << chan));
-       /* read status */
-       return dio200_read8(dev, subpriv->ofs + chan);
-}
-
-/*
- * Handle 'insn_read' for an '8254' counter subdevice.
- */
-static int
-dio200_subdev_8254_read(struct comedi_device *dev, struct comedi_subdevice *s,
-                       struct comedi_insn *insn, unsigned int *data)
-{
-       struct dio200_subdev_8254 *subpriv = s->private;
-       int chan = CR_CHAN(insn->chanspec);
-       unsigned int n;
-       unsigned long flags;
-
-       for (n = 0; n < insn->n; n++) {
-               spin_lock_irqsave(&subpriv->spinlock, flags);
-               data[n] = dio200_subdev_8254_read_chan(dev, s, chan);
-               spin_unlock_irqrestore(&subpriv->spinlock, flags);
-       }
-       return insn->n;
-}
-
-/*
- * Handle 'insn_write' for an '8254' counter subdevice.
- */
-static int
-dio200_subdev_8254_write(struct comedi_device *dev, struct comedi_subdevice *s,
-                        struct comedi_insn *insn, unsigned int *data)
-{
-       struct dio200_subdev_8254 *subpriv = s->private;
-       int chan = CR_CHAN(insn->chanspec);
-       unsigned int n;
-       unsigned long flags;
-
-       for (n = 0; n < insn->n; n++) {
-               spin_lock_irqsave(&subpriv->spinlock, flags);
-               dio200_subdev_8254_write_chan(dev, s, chan, data[n]);
-               spin_unlock_irqrestore(&subpriv->spinlock, flags);
-       }
-       return insn->n;
-}
-
-/*
- * Set gate source for an '8254' counter subdevice channel.
- */
-static int
-dio200_subdev_8254_set_gate_src(struct comedi_device *dev,
-                               struct comedi_subdevice *s,
-                               unsigned int counter_number,
-                               unsigned int gate_src)
-{
-       const struct dio200_layout *layout = dio200_dev_layout(dev);
-       struct dio200_subdev_8254 *subpriv = s->private;
-       unsigned char byte;
-
-       if (!layout->has_clk_gat_sce)
-               return -1;
-       if (counter_number > 2)
-               return -1;
-       if (gate_src > (layout->has_enhancements ? 31 : 7))
-               return -1;
-
-       subpriv->gate_src[counter_number] = gate_src;
-       byte = gat_sce(subpriv->which, counter_number, gate_src);
-       dio200_write8(dev, subpriv->gat_sce_ofs, byte);
-
-       return 0;
-}
-
-/*
- * Get gate source for an '8254' counter subdevice channel.
- */
-static int
-dio200_subdev_8254_get_gate_src(struct comedi_device *dev,
-                               struct comedi_subdevice *s,
-                               unsigned int counter_number)
-{
-       const struct dio200_layout *layout = dio200_dev_layout(dev);
-       struct dio200_subdev_8254 *subpriv = s->private;
-
-       if (!layout->has_clk_gat_sce)
-               return -1;
-       if (counter_number > 2)
-               return -1;
-
-       return subpriv->gate_src[counter_number];
-}
-
-/*
- * Set clock source for an '8254' counter subdevice channel.
- */
-static int
-dio200_subdev_8254_set_clock_src(struct comedi_device *dev,
-                                struct comedi_subdevice *s,
-                                unsigned int counter_number,
-                                unsigned int clock_src)
-{
-       const struct dio200_layout *layout = dio200_dev_layout(dev);
-       struct dio200_subdev_8254 *subpriv = s->private;
-       unsigned char byte;
-
-       if (!layout->has_clk_gat_sce)
-               return -1;
-       if (counter_number > 2)
-               return -1;
-       if (clock_src > (layout->has_enhancements ? 31 : 7))
-               return -1;
-
-       subpriv->clock_src[counter_number] = clock_src;
-       byte = clk_sce(subpriv->which, counter_number, clock_src);
-       dio200_write8(dev, subpriv->clk_sce_ofs, byte);
-
-       return 0;
-}
-
-/*
- * Get clock source for an '8254' counter subdevice channel.
- */
-static int
-dio200_subdev_8254_get_clock_src(struct comedi_device *dev,
-                                struct comedi_subdevice *s,
-                                unsigned int counter_number,
-                                unsigned int *period_ns)
-{
-       const struct dio200_layout *layout = dio200_dev_layout(dev);
-       struct dio200_subdev_8254 *subpriv = s->private;
-       unsigned clock_src;
-
-       if (!layout->has_clk_gat_sce)
-               return -1;
-       if (counter_number > 2)
-               return -1;
-
-       clock_src = subpriv->clock_src[counter_number];
-       *period_ns = clock_period[clock_src];
-       return clock_src;
-}
-
-/*
- * Handle 'insn_config' for an '8254' counter subdevice.
- */
-static int
-dio200_subdev_8254_config(struct comedi_device *dev, struct comedi_subdevice *s,
-                         struct comedi_insn *insn, unsigned int *data)
-{
-       struct dio200_subdev_8254 *subpriv = s->private;
-       int ret = 0;
-       int chan = CR_CHAN(insn->chanspec);
-       unsigned long flags;
-
-       spin_lock_irqsave(&subpriv->spinlock, flags);
-       switch (data[0]) {
-       case INSN_CONFIG_SET_COUNTER_MODE:
-               if (data[1] > (I8254_MODE5 | I8254_BINARY))
-                       ret = -EINVAL;
-               else
-                       dio200_subdev_8254_set_mode(dev, s, chan, data[1]);
-               break;
-       case INSN_CONFIG_8254_READ_STATUS:
-               data[1] = dio200_subdev_8254_status(dev, s, chan);
-               break;
-       case INSN_CONFIG_SET_GATE_SRC:
-               ret = dio200_subdev_8254_set_gate_src(dev, s, chan, data[2]);
-               if (ret < 0)
-                       ret = -EINVAL;
-               break;
-       case INSN_CONFIG_GET_GATE_SRC:
-               ret = dio200_subdev_8254_get_gate_src(dev, s, chan);
-               if (ret < 0) {
-                       ret = -EINVAL;
-                       break;
-               }
-               data[2] = ret;
-               break;
-       case INSN_CONFIG_SET_CLOCK_SRC:
-               ret = dio200_subdev_8254_set_clock_src(dev, s, chan, data[1]);
-               if (ret < 0)
-                       ret = -EINVAL;
-               break;
-       case INSN_CONFIG_GET_CLOCK_SRC:
-               ret = dio200_subdev_8254_get_clock_src(dev, s, chan, &data[2]);
-               if (ret < 0) {
-                       ret = -EINVAL;
-                       break;
-               }
-               data[1] = ret;
-               break;
-       default:
-               ret = -EINVAL;
-               break;
-       }
-       spin_unlock_irqrestore(&subpriv->spinlock, flags);
-       return ret < 0 ? ret : insn->n;
-}
-
-/*
- * This function initializes an '8254' counter subdevice.
- */
-static int
-dio200_subdev_8254_init(struct comedi_device *dev, struct comedi_subdevice *s,
-                       unsigned int offset)
-{
-       const struct dio200_layout *layout = dio200_dev_layout(dev);
-       struct dio200_subdev_8254 *subpriv;
-       unsigned int chan;
-
-       subpriv = kzalloc(sizeof(*subpriv), GFP_KERNEL);
-       if (!subpriv)
-               return -ENOMEM;
-
-       s->private = subpriv;
-       s->type = COMEDI_SUBD_COUNTER;
-       s->subdev_flags = SDF_WRITABLE | SDF_READABLE;
-       s->n_chan = 3;
-       s->maxdata = 0xFFFF;
-       s->insn_read = dio200_subdev_8254_read;
-       s->insn_write = dio200_subdev_8254_write;
-       s->insn_config = dio200_subdev_8254_config;
-
-       spin_lock_init(&subpriv->spinlock);
-       subpriv->ofs = offset;
-       if (layout->has_clk_gat_sce) {
-               /* Derive CLK_SCE and GAT_SCE register offsets from
-                * 8254 offset. */
-               subpriv->clk_sce_ofs = DIO200_XCLK_SCE + (offset >> 3);
-               subpriv->gat_sce_ofs = DIO200_XGAT_SCE + (offset >> 3);
-               subpriv->which = (offset >> 2) & 1;
-       }
-
-       /* Initialize channels. */
-       for (chan = 0; chan < 3; chan++) {
-               dio200_subdev_8254_set_mode(dev, s, chan,
-                                           I8254_MODE0 | I8254_BINARY);
-               if (layout->has_clk_gat_sce) {
-                       /* Gate source 0 is VCC (logic 1). */
-                       dio200_subdev_8254_set_gate_src(dev, s, chan, 0);
-                       /* Clock source 0 is the dedicated clock input. */
-                       dio200_subdev_8254_set_clock_src(dev, s, chan, 0);
-               }
-       }
-
-       return 0;
-}
-
-/*
- * This function cleans up an '8254' counter subdevice.
- */
-static void
-dio200_subdev_8254_cleanup(struct comedi_device *dev,
-                          struct comedi_subdevice *s)
-{
-       struct dio200_subdev_intr *subpriv = s->private;
-       kfree(subpriv);
-}
-
-/*
- * This function sets I/O directions for an '8255' DIO subdevice.
- */
-static void dio200_subdev_8255_set_dir(struct comedi_device *dev,
-                                      struct comedi_subdevice *s)
-{
-       struct dio200_subdev_8255 *subpriv = s->private;
-       int config;
-
-       config = CR_CW;
-       /* 1 in io_bits indicates output, 1 in config indicates input */
-       if (!(s->io_bits & 0x0000ff))
-               config |= CR_A_IO;
-       if (!(s->io_bits & 0x00ff00))
-               config |= CR_B_IO;
-       if (!(s->io_bits & 0x0f0000))
-               config |= CR_C_LO_IO;
-       if (!(s->io_bits & 0xf00000))
-               config |= CR_C_HI_IO;
-       dio200_write8(dev, subpriv->ofs + 3, config);
-}
-
-/*
- * Handle 'insn_bits' for an '8255' DIO subdevice.
- */
-static int dio200_subdev_8255_bits(struct comedi_device *dev,
-                                  struct comedi_subdevice *s,
-                                  struct comedi_insn *insn, unsigned int *data)
-{
-       struct dio200_subdev_8255 *subpriv = s->private;
-
-       if (data[0]) {
-               s->state &= ~data[0];
-               s->state |= (data[0] & data[1]);
-               if (data[0] & 0xff)
-                       dio200_write8(dev, subpriv->ofs, s->state & 0xff);
-               if (data[0] & 0xff00)
-                       dio200_write8(dev, subpriv->ofs + 1,
-                                     (s->state >> 8) & 0xff);
-               if (data[0] & 0xff0000)
-                       dio200_write8(dev, subpriv->ofs + 2,
-                                     (s->state >> 16) & 0xff);
-       }
-       data[1] = dio200_read8(dev, subpriv->ofs);
-       data[1] |= dio200_read8(dev, subpriv->ofs + 1) << 8;
-       data[1] |= dio200_read8(dev, subpriv->ofs + 2) << 16;
-       return 2;
-}
-
-/*
- * Handle 'insn_config' for an '8255' DIO subdevice.
- */
-static int dio200_subdev_8255_config(struct comedi_device *dev,
-                                    struct comedi_subdevice *s,
-                                    struct comedi_insn *insn,
-                                    unsigned int *data)
-{
-       unsigned int mask;
-       unsigned int bits;
-
-       mask = 1 << CR_CHAN(insn->chanspec);
-       if (mask & 0x0000ff)
-               bits = 0x0000ff;
-       else if (mask & 0x00ff00)
-               bits = 0x00ff00;
-       else if (mask & 0x0f0000)
-               bits = 0x0f0000;
-       else
-               bits = 0xf00000;
-       switch (data[0]) {
-       case INSN_CONFIG_DIO_INPUT:
-               s->io_bits &= ~bits;
-               break;
-       case INSN_CONFIG_DIO_OUTPUT:
-               s->io_bits |= bits;
-               break;
-       case INSN_CONFIG_DIO_QUERY:
-               data[1] = (s->io_bits & bits) ? COMEDI_OUTPUT : COMEDI_INPUT;
-               return insn->n;
-               break;
-       default:
-               return -EINVAL;
-       }
-       dio200_subdev_8255_set_dir(dev, s);
-       return 1;
-}
-
-/*
- * This function initializes an '8255' DIO subdevice.
- *
- * offset is the offset to the 8255 chip.
- */
-static int dio200_subdev_8255_init(struct comedi_device *dev,
-                                  struct comedi_subdevice *s,
-                                  unsigned int offset)
-{
-       struct dio200_subdev_8255 *subpriv;
-
-       subpriv = kzalloc(sizeof(*subpriv), GFP_KERNEL);
-       if (!subpriv)
-               return -ENOMEM;
-       subpriv->ofs = offset;
-       s->private = subpriv;
-       s->type = COMEDI_SUBD_DIO;
-       s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
-       s->n_chan = 24;
-       s->range_table = &range_digital;
-       s->maxdata = 1;
-       s->insn_bits = dio200_subdev_8255_bits;
-       s->insn_config = dio200_subdev_8255_config;
-       s->state = 0;
-       s->io_bits = 0;
-       dio200_subdev_8255_set_dir(dev, s);
-       return 0;
-}
-
-/*
- * This function cleans up an '8255' DIO subdevice.
- */
-static void dio200_subdev_8255_cleanup(struct comedi_device *dev,
-                                      struct comedi_subdevice *s)
-{
-       struct dio200_subdev_8255 *subpriv = s->private;
-
-       kfree(subpriv);
-}
-
-/*
- * Handle 'insn_read' for a timer subdevice.
- */
-static int dio200_subdev_timer_read(struct comedi_device *dev,
-                                   struct comedi_subdevice *s,
-                                   struct comedi_insn *insn,
-                                   unsigned int *data)
-{
-       unsigned int n;
-
-       for (n = 0; n < insn->n; n++)
-               data[n] = dio200_read32(dev, DIO200_TS_COUNT);
-       return n;
-}
-
-/*
- * Reset timer subdevice.
- */
-static void dio200_subdev_timer_reset(struct comedi_device *dev,
-                                     struct comedi_subdevice *s)
-{
-       unsigned int clock;
-
-       clock = dio200_read32(dev, DIO200_TS_CONFIG) & TS_CONFIG_CLK_SRC_MASK;
-       dio200_write32(dev, DIO200_TS_CONFIG, clock | TS_CONFIG_RESET);
-       dio200_write32(dev, DIO200_TS_CONFIG, clock);
-}
-
-/*
- * Get timer subdevice clock source and period.
- */
-static void dio200_subdev_timer_get_clock_src(struct comedi_device *dev,
-                                             struct comedi_subdevice *s,
-                                             unsigned int *src,
-                                             unsigned int *period)
-{
-       unsigned int clk;
-
-       clk = dio200_read32(dev, DIO200_TS_CONFIG) & TS_CONFIG_CLK_SRC_MASK;
-       *src = clk;
-       *period = (clk < ARRAY_SIZE(ts_clock_period)) ?
-                 ts_clock_period[clk] : 0;
-}
-
-/*
- * Set timer subdevice clock source.
- */
-static int dio200_subdev_timer_set_clock_src(struct comedi_device *dev,
-                                            struct comedi_subdevice *s,
-                                            unsigned int src)
-{
-       if (src > TS_CONFIG_MAX_CLK_SRC)
-               return -EINVAL;
-       dio200_write32(dev, DIO200_TS_CONFIG, src);
-       return 0;
-}
-
-/*
- * Handle 'insn_config' for a timer subdevice.
- */
-static int dio200_subdev_timer_config(struct comedi_device *dev,
-                                     struct comedi_subdevice *s,
-                                     struct comedi_insn *insn,
-                                     unsigned int *data)
-{
-       int ret = 0;
-
-       switch (data[0]) {
-       case INSN_CONFIG_RESET:
-               dio200_subdev_timer_reset(dev, s);
-               break;
-       case INSN_CONFIG_SET_CLOCK_SRC:
-               ret = dio200_subdev_timer_set_clock_src(dev, s, data[1]);
-               if (ret < 0)
-                       ret = -EINVAL;
-               break;
-       case INSN_CONFIG_GET_CLOCK_SRC:
-               dio200_subdev_timer_get_clock_src(dev, s, &data[1], &data[2]);
-               break;
-       default:
-               ret = -EINVAL;
-               break;
-       }
-       return ret < 0 ? ret : insn->n;
-}
-
-/*
- * This function initializes a timer subdevice.
- *
- * Uses the timestamp timer registers.  There is only one timestamp timer.
- */
-static int dio200_subdev_timer_init(struct comedi_device *dev,
-                                   struct comedi_subdevice *s)
-{
-       s->type = COMEDI_SUBD_TIMER;
-       s->subdev_flags = SDF_READABLE | SDF_LSAMPL;
-       s->n_chan = 1;
-       s->maxdata = 0xFFFFFFFF;
-       s->insn_read = dio200_subdev_timer_read;
-       s->insn_config = dio200_subdev_timer_config;
-       return 0;
-}
-
-/*
- * This function cleans up a timer subdevice.
- */
-static void dio200_subdev_timer_cleanup(struct comedi_device *dev,
-                                       struct comedi_subdevice *s)
-{
-       /* Nothing to do. */
-}
-
-/*
- * This function does some special set-up for the PCIe boards
- * PCIe215, PCIe236, PCIe296.
- */
-static int dio200_pcie_board_setup(struct comedi_device *dev)
-{
-       struct pci_dev *pcidev = comedi_to_pci_dev(dev);
-       void __iomem *brbase;
-       resource_size_t brlen;
-
-       /*
-        * The board uses Altera Cyclone IV with PCI-Express hard IP.
-        * The FPGA configuration has the PCI-Express Avalon-MM Bridge
-        * Control registers in PCI BAR 0, offset 0, and the length of
-        * these registers is 0x4000.
-        *
-        * We need to write 0x80 to the "Avalon-MM to PCI-Express Interrupt
-        * Enable" register at offset 0x50 to allow generation of PCIe
-        * interrupts when RXmlrq_i is asserted in the SOPC Builder system.
-        */
-       brlen = pci_resource_len(pcidev, 0);
-       if (brlen < 0x4000 ||
-                       !(pci_resource_flags(pcidev, 0) & IORESOURCE_MEM)) {
-               dev_err(dev->class_dev, "error! bad PCI region!\n");
-               return -EINVAL;
-       }
-       brbase = ioremap_nocache(pci_resource_start(pcidev, 0), brlen);
-       if (!brbase) {
-               dev_err(dev->class_dev, "error! failed to map registers!\n");
-               return -ENOMEM;
-       }
-       writel(0x80, brbase + 0x50);
-       iounmap(brbase);
-       /* Enable "enhanced" features of board. */
-       dio200_write8(dev, DIO200_ENHANCE, 1);
-       return 0;
-}
-
-static int dio200_common_attach(struct comedi_device *dev, unsigned int irq,
-                               unsigned long req_irq_flags)
-{
-       const struct dio200_board *thisboard = comedi_board(dev);
-       struct dio200_private *devpriv = dev->private;
-       const struct dio200_layout *layout = dio200_board_layout(thisboard);
-       struct comedi_subdevice *s;
-       int sdx;
-       unsigned int n;
-       int ret;
-
-       devpriv->intr_sd = -1;
-
-       ret = comedi_alloc_subdevices(dev, layout->n_subdevs);
-       if (ret)
-               return ret;
-
-       for (n = 0; n < dev->n_subdevices; n++) {
-               s = &dev->subdevices[n];
-               switch (layout->sdtype[n]) {
-               case sd_8254:
-                       /* counter subdevice (8254) */
-                       ret = dio200_subdev_8254_init(dev, s,
-                                                     layout->sdinfo[n]);
-                       if (ret < 0)
-                               return ret;
-                       break;
-               case sd_8255:
-                       /* digital i/o subdevice (8255) */
-                       ret = dio200_subdev_8255_init(dev, s,
-                                                     layout->sdinfo[n]);
-                       if (ret < 0)
-                               return ret;
-                       break;
-               case sd_intr:
-                       /* 'INTERRUPT' subdevice */
-                       if (irq) {
-                               ret = dio200_subdev_intr_init(dev, s,
-                                                             DIO200_INT_SCE,
-                                                             layout->sdinfo[n]
-                                                            );
-                               if (ret < 0)
-                                       return ret;
-                               devpriv->intr_sd = n;
-                       } else {
-                               s->type = COMEDI_SUBD_UNUSED;
-                       }
-                       break;
-               case sd_timer:
-                       ret = dio200_subdev_timer_init(dev, s);
-                       if (ret < 0)
-                               return ret;
-                       break;
-               default:
-                       s->type = COMEDI_SUBD_UNUSED;
-                       break;
-               }
-       }
-       sdx = devpriv->intr_sd;
-       if (sdx >= 0 && sdx < dev->n_subdevices)
-               dev->read_subdev = &dev->subdevices[sdx];
-       if (irq) {
-               if (request_irq(irq, dio200_interrupt, req_irq_flags,
-                               dev->board_name, dev) >= 0) {
-                       dev->irq = irq;
-               } else {
-                       dev_warn(dev->class_dev,
-                                "warning! irq %u unavailable!\n", irq);
-               }
-       }
-       dev_info(dev->class_dev, "attached\n");
-       return 0;
-}
-
-/* Only called for ISA boards. */
-static int dio200_attach(struct comedi_device *dev, struct comedi_devconfig *it)
-{
-       const struct dio200_board *thisboard = comedi_board(dev);
-       struct dio200_private *devpriv;
-       unsigned long iobase;
-       unsigned int irq;
-       int ret;
-
-       if (!DO_ISA)
-               return -EINVAL;
-
-       dev->board_name = thisboard->name;
-       iobase = it->options[0];
-       irq = it->options[1];
-       dev_info(dev->class_dev, "%s: attach %s 0x%lX,%u\n",
-                dev->driver->driver_name, dev->board_name, iobase, irq);
-
-       devpriv = kzalloc(sizeof(*devpriv), GFP_KERNEL);
-       if (!devpriv)
-               return -ENOMEM;
-       dev->private = devpriv;
-
-       ret = dio200_request_region(dev, iobase, thisboard->mainsize);
-       if (ret < 0)
-               return ret;
-       devpriv->io.u.iobase = iobase;
-       devpriv->io.regtype = io_regtype;
-       return dio200_common_attach(dev, irq, 0);
-}
-
-/*
- * The auto_attach hook is called at PCI probe time via
- * comedi_pci_auto_config().  dev->board_ptr is NULL on entry.
- * The context should be an index into dio200_pci_boards[].
- */
-static int dio200_auto_attach(struct comedi_device *dev,
-                             unsigned long context_model)
-{
-       struct pci_dev *pci_dev = comedi_to_pci_dev(dev);
-       const struct dio200_board *thisboard = NULL;
-       struct dio200_private *devpriv;
-       resource_size_t base, len;
-       unsigned int bar;
-       int ret;
-
-       if (!DO_PCI)
-               return -EINVAL;
-
-       if (context_model < ARRAY_SIZE(dio200_pci_boards))
-               thisboard = &dio200_pci_boards[context_model];
-       if (!thisboard)
-               return -EINVAL;
-       dev->board_ptr = thisboard;
-       dev->board_name = thisboard->name;
-
-       dev_info(dev->class_dev, "%s: attach pci %s (%s)\n",
-                dev->driver->driver_name, pci_name(pci_dev), dev->board_name);
-
-       devpriv = kzalloc(sizeof(*devpriv), GFP_KERNEL);
-       if (!devpriv)
-               return -ENOMEM;
-       dev->private = devpriv;
-
-       ret = comedi_pci_enable(dev);
-       if (ret)
-               return ret;
-
-       bar = thisboard->mainbar;
-       base = pci_resource_start(pci_dev, bar);
-       len = pci_resource_len(pci_dev, bar);
-       if (len < thisboard->mainsize) {
-               dev_err(dev->class_dev, "error! PCI region size too small!\n");
-               return -EINVAL;
-       }
-       if ((pci_resource_flags(pci_dev, bar) & IORESOURCE_MEM) != 0) {
-               devpriv->io.u.membase = ioremap_nocache(base, len);
-               if (!devpriv->io.u.membase) {
-                       dev_err(dev->class_dev,
-                               "error! cannot remap registers\n");
-                       return -ENOMEM;
-               }
-               devpriv->io.regtype = mmio_regtype;
-       } else {
-               devpriv->io.u.iobase = (unsigned long)base;
-               devpriv->io.regtype = io_regtype;
-       }
-       switch (context_model) {
-       case pcie215_model:
-       case pcie236_model:
-       case pcie296_model:
-               ret = dio200_pcie_board_setup(dev);
-               if (ret < 0)
-                       return ret;
-               break;
-       default:
-               break;
-       }
-       return dio200_common_attach(dev, pci_dev->irq, IRQF_SHARED);
-}
-
-static void dio200_detach(struct comedi_device *dev)
-{
-       const struct dio200_board *thisboard = comedi_board(dev);
-       struct dio200_private *devpriv = dev->private;
-       const struct dio200_layout *layout;
-       unsigned n;
-
-       if (!thisboard || !devpriv)
-               return;
-       if (dev->irq)
-               free_irq(dev->irq, dev);
-       if (dev->subdevices) {
-               layout = dio200_board_layout(thisboard);
-               for (n = 0; n < dev->n_subdevices; n++) {
-                       struct comedi_subdevice *s = &dev->subdevices[n];
-                       switch (layout->sdtype[n]) {
-                       case sd_8254:
-                               dio200_subdev_8254_cleanup(dev, s);
-                               break;
-                       case sd_8255:
-                               dio200_subdev_8255_cleanup(dev, s);
-                               break;
-                       case sd_intr:
-                               dio200_subdev_intr_cleanup(dev, s);
-                               break;
-                       case sd_timer:
-                               dio200_subdev_timer_cleanup(dev, s);
-                               break;
-                       default:
-                               break;
-                       }
-               }
-       }
-       if (is_isa_board(thisboard)) {
-               if (devpriv->io.regtype == io_regtype)
-                       release_region(devpriv->io.u.iobase,
-                                      thisboard->mainsize);
-       } else if (is_pci_board(thisboard)) {
-               if (devpriv->io.regtype == mmio_regtype)
-                       iounmap(devpriv->io.u.membase);
-               comedi_pci_disable(dev);
-       }
-}
-
-/*
- * The struct comedi_driver structure tells the Comedi core module
- * which functions to call to configure/deconfigure (attach/detach)
- * the board, and also about the kernel module that contains
- * the device code.
- */
 static struct comedi_driver amplc_dio200_driver = {
        .driver_name = "amplc_dio200",
        .module = THIS_MODULE,
        .attach = dio200_attach,
-       .auto_attach = dio200_auto_attach,
        .detach = dio200_detach,
-#if DO_ISA
        .board_name = &dio200_isa_boards[0].name,
        .offset = sizeof(struct dio200_board),
        .num_names = ARRAY_SIZE(dio200_isa_boards),
-#endif
-};
-
-#if DO_PCI
-static DEFINE_PCI_DEVICE_TABLE(dio200_pci_table) = {
-       {
-               PCI_VDEVICE(AMPLICON, PCI_DEVICE_ID_AMPLICON_PCI215),
-               pci215_model
-       }, {
-               PCI_VDEVICE(AMPLICON, PCI_DEVICE_ID_AMPLICON_PCI272),
-               pci272_model
-       }, {
-               PCI_VDEVICE(AMPLICON, PCI_DEVICE_ID_AMPLICON_PCIE236),
-               pcie236_model
-       }, {
-               PCI_VDEVICE(AMPLICON, PCI_DEVICE_ID_AMPLICON_PCIE215),
-               pcie215_model
-       }, {
-               PCI_VDEVICE(AMPLICON, PCI_DEVICE_ID_AMPLICON_PCIE296),
-               pcie296_model
-       },
-       {0}
-};
-
-MODULE_DEVICE_TABLE(pci, dio200_pci_table);
-
-static int amplc_dio200_pci_probe(struct pci_dev *dev,
-                                 const struct pci_device_id *id)
-{
-       return comedi_pci_auto_config(dev, &amplc_dio200_driver,
-                                     id->driver_data);
-}
-
-static struct pci_driver amplc_dio200_pci_driver = {
-       .name = "amplc_dio200",
-       .id_table = dio200_pci_table,
-       .probe = &amplc_dio200_pci_probe,
-       .remove = comedi_pci_auto_unconfig,
 };
-module_comedi_pci_driver(amplc_dio200_driver, amplc_dio200_pci_driver);
-#else
 module_comedi_driver(amplc_dio200_driver);
-#endif
 
 MODULE_AUTHOR("Comedi http://www.comedi.org");
-MODULE_DESCRIPTION("Comedi low-level driver");
+MODULE_DESCRIPTION("Comedi driver for Amplicon 200 Series ISA DIO boards");
 MODULE_LICENSE("GPL");
diff --git a/drivers/staging/comedi/drivers/amplc_dio200.h b/drivers/staging/comedi/drivers/amplc_dio200.h
new file mode 100644 (file)
index 0000000..cf2e726
--- /dev/null
@@ -0,0 +1,95 @@
+/*
+    comedi/drivers/amplc_dio.h
+
+    Header for amplc_dio200.c, amplc_dio200_common.c and
+    amplc_dio200_pci.c.
+
+    Copyright (C) 2005-2013 MEV Ltd. <http://www.mev.co.uk/>
+
+    COMEDI - Linux Control and Measurement Device Interface
+    Copyright (C) 1998,2000 David A. Schleef <ds@schleef.org>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+
+#ifndef AMPLC_DIO200_H_INCLUDED
+#define AMPLC_DIO200_H_INCLUDED
+
+/* 200 series register area sizes */
+#define DIO200_IO_SIZE         0x20
+#define DIO200_PCIE_IO_SIZE    0x4000
+
+/*
+ * Register region.
+ */
+enum dio200_regtype { no_regtype = 0, io_regtype, mmio_regtype };
+struct dio200_region {
+       union {
+               unsigned long iobase;           /* I/O base address */
+               unsigned char __iomem *membase; /* mapped MMIO base address */
+       } u;
+       enum dio200_regtype regtype;
+};
+
+/*
+ * Subdevice types.
+ */
+enum dio200_sdtype { sd_none, sd_intr, sd_8255, sd_8254, sd_timer };
+
+#define DIO200_MAX_SUBDEVS     8
+#define DIO200_MAX_ISNS                6
+
+/*
+ * Board descriptions.
+ */
+
+struct dio200_layout {
+       unsigned short n_subdevs;       /* number of subdevices */
+       unsigned char sdtype[DIO200_MAX_SUBDEVS];       /* enum dio200_sdtype */
+       unsigned char sdinfo[DIO200_MAX_SUBDEVS];       /* depends on sdtype */
+       bool has_int_sce:1;             /* has interrupt enable/status reg */
+       bool has_clk_gat_sce:1;         /* has clock/gate selection registers */
+       bool has_enhancements:1;        /* has enhanced features */
+};
+
+enum dio200_bustype { isa_bustype, pci_bustype };
+
+struct dio200_board {
+       const char *name;
+       struct dio200_layout layout;
+       enum dio200_bustype bustype;
+       unsigned char mainbar;
+       unsigned char mainshift;
+       unsigned int mainsize;
+};
+
+/*
+ * Comedi device private data.
+ */
+struct dio200_private {
+       struct dio200_region io;        /* Register region */
+       int intr_sd;
+};
+
+int amplc_dio200_common_attach(struct comedi_device *dev, unsigned int irq,
+                              unsigned long req_irq_flags);
+
+void amplc_dio200_common_detach(struct comedi_device *dev);
+
+/* Used by initialization of PCIe boards. */
+void amplc_dio200_set_enhance(struct comedi_device *dev, unsigned char val);
+
+#endif
diff --git a/drivers/staging/comedi/drivers/amplc_dio200_common.c b/drivers/staging/comedi/drivers/amplc_dio200_common.c
new file mode 100644 (file)
index 0000000..04a798e
--- /dev/null
@@ -0,0 +1,1320 @@
+/*
+    comedi/drivers/amplc_dio200_common.c
+
+    Common support code for "amplc_dio200" and "amplc_dio200_pci".
+
+    Copyright (C) 2005-2013 MEV Ltd. <http://www.mev.co.uk/>
+
+    COMEDI - Linux Control and Measurement Device Interface
+    Copyright (C) 1998,2000 David A. Schleef <ds@schleef.org>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+
+#include <linux/interrupt.h>
+#include <linux/slab.h>
+
+#include "../comedidev.h"
+
+#include "amplc_dio200.h"
+#include "comedi_fc.h"
+#include "8253.h"
+
+/* 8255 control register bits */
+#define CR_C_LO_IO     0x01
+#define CR_B_IO                0x02
+#define CR_B_MODE      0x04
+#define CR_C_HI_IO     0x08
+#define CR_A_IO                0x10
+#define CR_A_MODE(a)   ((a)<<5)
+#define CR_CW          0x80
+
+/* 200 series registers */
+#define DIO200_IO_SIZE         0x20
+#define DIO200_PCIE_IO_SIZE    0x4000
+#define DIO200_XCLK_SCE                0x18    /* Group X clock selection register */
+#define DIO200_YCLK_SCE                0x19    /* Group Y clock selection register */
+#define DIO200_ZCLK_SCE                0x1a    /* Group Z clock selection register */
+#define DIO200_XGAT_SCE                0x1b    /* Group X gate selection register */
+#define DIO200_YGAT_SCE                0x1c    /* Group Y gate selection register */
+#define DIO200_ZGAT_SCE                0x1d    /* Group Z gate selection register */
+#define DIO200_INT_SCE         0x1e    /* Interrupt enable/status register */
+/* Extra registers for new PCIe boards */
+#define DIO200_ENHANCE         0x20    /* 1 to enable enhanced features */
+#define DIO200_VERSION         0x24    /* Hardware version register */
+#define DIO200_TS_CONFIG       0x600   /* Timestamp timer config register */
+#define DIO200_TS_COUNT                0x602   /* Timestamp timer count register */
+
+/*
+ * Functions for constructing value for DIO_200_?CLK_SCE and
+ * DIO_200_?GAT_SCE registers:
+ *
+ * 'which' is: 0 for CTR-X1, CTR-Y1, CTR-Z1; 1 for CTR-X2, CTR-Y2 or CTR-Z2.
+ * 'chan' is the channel: 0, 1 or 2.
+ * 'source' is the signal source: 0 to 7, or 0 to 31 for "enhanced" boards.
+ */
+static unsigned char clk_gat_sce(unsigned int which, unsigned int chan,
+                                unsigned int source)
+{
+       return (which << 5) | (chan << 3) |
+              ((source & 030) << 3) | (source & 007);
+}
+
+static unsigned char clk_sce(unsigned int which, unsigned int chan,
+                            unsigned int source)
+{
+       return clk_gat_sce(which, chan, source);
+}
+
+static unsigned char gat_sce(unsigned int which, unsigned int chan,
+                            unsigned int source)
+{
+       return clk_gat_sce(which, chan, source);
+}
+
+/*
+ * Periods of the internal clock sources in nanoseconds.
+ */
+static const unsigned int clock_period[32] = {
+       [1] = 100,              /* 10 MHz */
+       [2] = 1000,             /* 1 MHz */
+       [3] = 10000,            /* 100 kHz */
+       [4] = 100000,           /* 10 kHz */
+       [5] = 1000000,          /* 1 kHz */
+       [11] = 50,              /* 20 MHz (enhanced boards) */
+       /* clock sources 12 and later reserved for enhanced boards */
+};
+
+/*
+ * Timestamp timer configuration register (for new PCIe boards).
+ */
+#define TS_CONFIG_RESET                0x100   /* Reset counter to zero. */
+#define TS_CONFIG_CLK_SRC_MASK 0x0FF   /* Clock source. */
+#define TS_CONFIG_MAX_CLK_SRC  2       /* Maximum clock source value. */
+
+/*
+ * Periods of the timestamp timer clock sources in nanoseconds.
+ */
+static const unsigned int ts_clock_period[TS_CONFIG_MAX_CLK_SRC + 1] = {
+       1,                      /* 1 nanosecond (but with 20 ns granularity). */
+       1000,                   /* 1 microsecond. */
+       1000000,                /* 1 millisecond. */
+};
+
+struct dio200_subdev_8254 {
+       unsigned int ofs;               /* Counter base offset */
+       unsigned int clk_sce_ofs;       /* CLK_SCE base address */
+       unsigned int gat_sce_ofs;       /* GAT_SCE base address */
+       int which;                      /* Bit 5 of CLK_SCE or GAT_SCE */
+       unsigned int clock_src[3];      /* Current clock sources */
+       unsigned int gate_src[3];       /* Current gate sources */
+       spinlock_t spinlock;
+};
+
+struct dio200_subdev_8255 {
+       unsigned int ofs;               /* DIO base offset */
+};
+
+struct dio200_subdev_intr {
+       spinlock_t spinlock;
+       unsigned int ofs;
+       unsigned int valid_isns;
+       unsigned int enabled_isns;
+       unsigned int stopcount;
+       bool active:1;
+       bool continuous:1;
+};
+
+static inline const struct dio200_layout *
+dio200_board_layout(const struct dio200_board *board)
+{
+       return &board->layout;
+}
+
+static inline const struct dio200_layout *
+dio200_dev_layout(struct comedi_device *dev)
+{
+       return dio200_board_layout(comedi_board(dev));
+}
+
+/*
+ * Read 8-bit register.
+ */
+static unsigned char dio200_read8(struct comedi_device *dev,
+                                 unsigned int offset)
+{
+       const struct dio200_board *thisboard = comedi_board(dev);
+       struct dio200_private *devpriv = dev->private;
+
+       offset <<= thisboard->mainshift;
+       if (devpriv->io.regtype == io_regtype)
+               return inb(devpriv->io.u.iobase + offset);
+       else
+               return readb(devpriv->io.u.membase + offset);
+}
+
+/*
+ * Write 8-bit register.
+ */
+static void dio200_write8(struct comedi_device *dev, unsigned int offset,
+                         unsigned char val)
+{
+       const struct dio200_board *thisboard = comedi_board(dev);
+       struct dio200_private *devpriv = dev->private;
+
+       offset <<= thisboard->mainshift;
+       if (devpriv->io.regtype == io_regtype)
+               outb(val, devpriv->io.u.iobase + offset);
+       else
+               writeb(val, devpriv->io.u.membase + offset);
+}
+
+/*
+ * Read 32-bit register.
+ */
+static unsigned int dio200_read32(struct comedi_device *dev,
+                                 unsigned int offset)
+{
+       const struct dio200_board *thisboard = comedi_board(dev);
+       struct dio200_private *devpriv = dev->private;
+
+       offset <<= thisboard->mainshift;
+       if (devpriv->io.regtype == io_regtype)
+               return inl(devpriv->io.u.iobase + offset);
+       else
+               return readl(devpriv->io.u.membase + offset);
+}
+
+/*
+ * Write 32-bit register.
+ */
+static void dio200_write32(struct comedi_device *dev, unsigned int offset,
+                          unsigned int val)
+{
+       const struct dio200_board *thisboard = comedi_board(dev);
+       struct dio200_private *devpriv = dev->private;
+
+       offset <<= thisboard->mainshift;
+       if (devpriv->io.regtype == io_regtype)
+               outl(val, devpriv->io.u.iobase + offset);
+       else
+               writel(val, devpriv->io.u.membase + offset);
+}
+
+/*
+ * 'insn_bits' function for an 'INTERRUPT' subdevice.
+ */
+static int
+dio200_subdev_intr_insn_bits(struct comedi_device *dev,
+                            struct comedi_subdevice *s,
+                            struct comedi_insn *insn, unsigned int *data)
+{
+       const struct dio200_layout *layout = dio200_dev_layout(dev);
+       struct dio200_subdev_intr *subpriv = s->private;
+
+       if (layout->has_int_sce) {
+               /* Just read the interrupt status register.  */
+               data[1] = dio200_read8(dev, subpriv->ofs) & subpriv->valid_isns;
+       } else {
+               /* No interrupt status register. */
+               data[0] = 0;
+       }
+
+       return insn->n;
+}
+
+/*
+ * Called to stop acquisition for an 'INTERRUPT' subdevice.
+ */
+static void dio200_stop_intr(struct comedi_device *dev,
+                            struct comedi_subdevice *s)
+{
+       const struct dio200_layout *layout = dio200_dev_layout(dev);
+       struct dio200_subdev_intr *subpriv = s->private;
+
+       subpriv->active = false;
+       subpriv->enabled_isns = 0;
+       if (layout->has_int_sce)
+               dio200_write8(dev, subpriv->ofs, 0);
+}
+
+/*
+ * Called to start acquisition for an 'INTERRUPT' subdevice.
+ */
+static int dio200_start_intr(struct comedi_device *dev,
+                            struct comedi_subdevice *s)
+{
+       unsigned int n;
+       unsigned isn_bits;
+       const struct dio200_layout *layout = dio200_dev_layout(dev);
+       struct dio200_subdev_intr *subpriv = s->private;
+       struct comedi_cmd *cmd = &s->async->cmd;
+       int retval = 0;
+
+       if (!subpriv->continuous && subpriv->stopcount == 0) {
+               /* An empty acquisition! */
+               s->async->events |= COMEDI_CB_EOA;
+               subpriv->active = false;
+               retval = 1;
+       } else {
+               /* Determine interrupt sources to enable. */
+               isn_bits = 0;
+               if (cmd->chanlist) {
+                       for (n = 0; n < cmd->chanlist_len; n++)
+                               isn_bits |= (1U << CR_CHAN(cmd->chanlist[n]));
+               }
+               isn_bits &= subpriv->valid_isns;
+               /* Enable interrupt sources. */
+               subpriv->enabled_isns = isn_bits;
+               if (layout->has_int_sce)
+                       dio200_write8(dev, subpriv->ofs, isn_bits);
+       }
+
+       return retval;
+}
+
+/*
+ * Internal trigger function to start acquisition for an 'INTERRUPT' subdevice.
+ */
+static int
+dio200_inttrig_start_intr(struct comedi_device *dev, struct comedi_subdevice *s,
+                         unsigned int trignum)
+{
+       struct dio200_subdev_intr *subpriv;
+       unsigned long flags;
+       int event = 0;
+
+       if (trignum != 0)
+               return -EINVAL;
+
+       subpriv = s->private;
+
+       spin_lock_irqsave(&subpriv->spinlock, flags);
+       s->async->inttrig = NULL;
+       if (subpriv->active)
+               event = dio200_start_intr(dev, s);
+
+       spin_unlock_irqrestore(&subpriv->spinlock, flags);
+
+       if (event)
+               comedi_event(dev, s);
+
+       return 1;
+}
+
+static void dio200_read_scan_intr(struct comedi_device *dev,
+                                 struct comedi_subdevice *s,
+                                 unsigned int triggered)
+{
+       struct dio200_subdev_intr *subpriv = s->private;
+       unsigned short val;
+       unsigned int n, ch, len;
+
+       val = 0;
+       len = s->async->cmd.chanlist_len;
+       for (n = 0; n < len; n++) {
+               ch = CR_CHAN(s->async->cmd.chanlist[n]);
+               if (triggered & (1U << ch))
+                       val |= (1U << n);
+       }
+       /* Write the scan to the buffer. */
+       if (comedi_buf_put(s->async, val)) {
+               s->async->events |= (COMEDI_CB_BLOCK | COMEDI_CB_EOS);
+       } else {
+               /* Error!  Stop acquisition.  */
+               dio200_stop_intr(dev, s);
+               s->async->events |= COMEDI_CB_ERROR | COMEDI_CB_OVERFLOW;
+               comedi_error(dev, "buffer overflow");
+       }
+
+       /* Check for end of acquisition. */
+       if (!subpriv->continuous) {
+               /* stop_src == TRIG_COUNT */
+               if (subpriv->stopcount > 0) {
+                       subpriv->stopcount--;
+                       if (subpriv->stopcount == 0) {
+                               s->async->events |= COMEDI_CB_EOA;
+                               dio200_stop_intr(dev, s);
+                       }
+               }
+       }
+}
+
+/*
+ * This is called from the interrupt service routine to handle a read
+ * scan on an 'INTERRUPT' subdevice.
+ */
+static int dio200_handle_read_intr(struct comedi_device *dev,
+                                  struct comedi_subdevice *s)
+{
+       const struct dio200_layout *layout = dio200_dev_layout(dev);
+       struct dio200_subdev_intr *subpriv = s->private;
+       unsigned triggered;
+       unsigned intstat;
+       unsigned cur_enabled;
+       unsigned int oldevents;
+       unsigned long flags;
+
+       triggered = 0;
+
+       spin_lock_irqsave(&subpriv->spinlock, flags);
+       oldevents = s->async->events;
+       if (layout->has_int_sce) {
+               /*
+                * Collect interrupt sources that have triggered and disable
+                * them temporarily.  Loop around until no extra interrupt
+                * sources have triggered, at which point, the valid part of
+                * the interrupt status register will read zero, clearing the
+                * cause of the interrupt.
+                *
+                * Mask off interrupt sources already seen to avoid infinite
+                * loop in case of misconfiguration.
+                */
+               cur_enabled = subpriv->enabled_isns;
+               while ((intstat = (dio200_read8(dev, subpriv->ofs) &
+                                  subpriv->valid_isns & ~triggered)) != 0) {
+                       triggered |= intstat;
+                       cur_enabled &= ~triggered;
+                       dio200_write8(dev, subpriv->ofs, cur_enabled);
+               }
+       } else {
+               /*
+                * No interrupt status register.  Assume the single interrupt
+                * source has triggered.
+                */
+               triggered = subpriv->enabled_isns;
+       }
+
+       if (triggered) {
+               /*
+                * Some interrupt sources have triggered and have been
+                * temporarily disabled to clear the cause of the interrupt.
+                *
+                * Reenable them NOW to minimize the time they are disabled.
+                */
+               cur_enabled = subpriv->enabled_isns;
+               if (layout->has_int_sce)
+                       dio200_write8(dev, subpriv->ofs, cur_enabled);
+
+               if (subpriv->active) {
+                       /*
+                        * The command is still active.
+                        *
+                        * Ignore interrupt sources that the command isn't
+                        * interested in (just in case there's a race
+                        * condition).
+                        */
+                       if (triggered & subpriv->enabled_isns)
+                               /* Collect scan data. */
+                               dio200_read_scan_intr(dev, s, triggered);
+               }
+       }
+       spin_unlock_irqrestore(&subpriv->spinlock, flags);
+
+       if (oldevents != s->async->events)
+               comedi_event(dev, s);
+
+       return (triggered != 0);
+}
+
+/*
+ * 'cancel' function for an 'INTERRUPT' subdevice.
+ */
+static int dio200_subdev_intr_cancel(struct comedi_device *dev,
+                                    struct comedi_subdevice *s)
+{
+       struct dio200_subdev_intr *subpriv = s->private;
+       unsigned long flags;
+
+       spin_lock_irqsave(&subpriv->spinlock, flags);
+       if (subpriv->active)
+               dio200_stop_intr(dev, s);
+
+       spin_unlock_irqrestore(&subpriv->spinlock, flags);
+
+       return 0;
+}
+
+/*
+ * 'do_cmdtest' function for an 'INTERRUPT' subdevice.
+ */
+static int
+dio200_subdev_intr_cmdtest(struct comedi_device *dev,
+                          struct comedi_subdevice *s, struct comedi_cmd *cmd)
+{
+       int err = 0;
+
+       /* Step 1 : check if triggers are trivially valid */
+
+       err |= cfc_check_trigger_src(&cmd->start_src, TRIG_NOW | TRIG_INT);
+       err |= cfc_check_trigger_src(&cmd->scan_begin_src, TRIG_EXT);
+       err |= cfc_check_trigger_src(&cmd->convert_src, TRIG_NOW);
+       err |= cfc_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT);
+       err |= cfc_check_trigger_src(&cmd->stop_src, TRIG_COUNT | TRIG_NONE);
+
+       if (err)
+               return 1;
+
+       /* Step 2a : make sure trigger sources are unique */
+
+       err |= cfc_check_trigger_is_unique(cmd->start_src);
+       err |= cfc_check_trigger_is_unique(cmd->stop_src);
+
+       /* Step 2b : and mutually compatible */
+
+       if (err)
+               return 2;
+
+       /* Step 3: check if arguments are trivially valid */
+
+       err |= cfc_check_trigger_arg_is(&cmd->start_arg, 0);
+       err |= cfc_check_trigger_arg_is(&cmd->scan_begin_arg, 0);
+       err |= cfc_check_trigger_arg_is(&cmd->convert_arg, 0);
+       err |= cfc_check_trigger_arg_is(&cmd->scan_end_arg, cmd->chanlist_len);
+
+       switch (cmd->stop_src) {
+       case TRIG_COUNT:
+               /* any count allowed */
+               break;
+       case TRIG_NONE:
+               err |= cfc_check_trigger_arg_is(&cmd->stop_arg, 0);
+               break;
+       default:
+               break;
+       }
+
+       if (err)
+               return 3;
+
+       /* step 4: fix up any arguments */
+
+       /* if (err) return 4; */
+
+       return 0;
+}
+
+/*
+ * 'do_cmd' function for an 'INTERRUPT' subdevice.
+ */
+static int dio200_subdev_intr_cmd(struct comedi_device *dev,
+                                 struct comedi_subdevice *s)
+{
+       struct comedi_cmd *cmd = &s->async->cmd;
+       struct dio200_subdev_intr *subpriv = s->private;
+       unsigned long flags;
+       int event = 0;
+
+       spin_lock_irqsave(&subpriv->spinlock, flags);
+       subpriv->active = 1;
+
+       /* Set up end of acquisition. */
+       switch (cmd->stop_src) {
+       case TRIG_COUNT:
+               subpriv->continuous = false;
+               subpriv->stopcount = cmd->stop_arg;
+               break;
+       default:
+               /* TRIG_NONE */
+               subpriv->continuous = true;
+               subpriv->stopcount = 0;
+               break;
+       }
+
+       /* Set up start of acquisition. */
+       switch (cmd->start_src) {
+       case TRIG_INT:
+               s->async->inttrig = dio200_inttrig_start_intr;
+               break;
+       default:
+               /* TRIG_NOW */
+               event = dio200_start_intr(dev, s);
+               break;
+       }
+       spin_unlock_irqrestore(&subpriv->spinlock, flags);
+
+       if (event)
+               comedi_event(dev, s);
+
+       return 0;
+}
+
+/*
+ * This function initializes an 'INTERRUPT' subdevice.
+ */
+static int
+dio200_subdev_intr_init(struct comedi_device *dev, struct comedi_subdevice *s,
+                       unsigned int offset, unsigned valid_isns)
+{
+       const struct dio200_layout *layout = dio200_dev_layout(dev);
+       struct dio200_subdev_intr *subpriv;
+
+       subpriv = kzalloc(sizeof(*subpriv), GFP_KERNEL);
+       if (!subpriv)
+               return -ENOMEM;
+
+       subpriv->ofs = offset;
+       subpriv->valid_isns = valid_isns;
+       spin_lock_init(&subpriv->spinlock);
+
+       if (layout->has_int_sce)
+               /* Disable interrupt sources. */
+               dio200_write8(dev, subpriv->ofs, 0);
+
+       s->private = subpriv;
+       s->type = COMEDI_SUBD_DI;
+       s->subdev_flags = SDF_READABLE | SDF_CMD_READ;
+       if (layout->has_int_sce) {
+               s->n_chan = DIO200_MAX_ISNS;
+               s->len_chanlist = DIO200_MAX_ISNS;
+       } else {
+               /* No interrupt source register.  Support single channel. */
+               s->n_chan = 1;
+               s->len_chanlist = 1;
+       }
+       s->range_table = &range_digital;
+       s->maxdata = 1;
+       s->insn_bits = dio200_subdev_intr_insn_bits;
+       s->do_cmdtest = dio200_subdev_intr_cmdtest;
+       s->do_cmd = dio200_subdev_intr_cmd;
+       s->cancel = dio200_subdev_intr_cancel;
+
+       return 0;
+}
+
+/*
+ * This function cleans up an 'INTERRUPT' subdevice.
+ */
+static void
+dio200_subdev_intr_cleanup(struct comedi_device *dev,
+                          struct comedi_subdevice *s)
+{
+       struct dio200_subdev_intr *subpriv = s->private;
+       kfree(subpriv);
+}
+
+/*
+ * Interrupt service routine.
+ */
+static irqreturn_t dio200_interrupt(int irq, void *d)
+{
+       struct comedi_device *dev = d;
+       struct dio200_private *devpriv = dev->private;
+       struct comedi_subdevice *s;
+       int handled;
+
+       if (!dev->attached)
+               return IRQ_NONE;
+
+       if (devpriv->intr_sd >= 0) {
+               s = &dev->subdevices[devpriv->intr_sd];
+               handled = dio200_handle_read_intr(dev, s);
+       } else {
+               handled = 0;
+       }
+
+       return IRQ_RETVAL(handled);
+}
+
+/*
+ * Read an '8254' counter subdevice channel.
+ */
+static unsigned int
+dio200_subdev_8254_read_chan(struct comedi_device *dev,
+                            struct comedi_subdevice *s, unsigned int chan)
+{
+       struct dio200_subdev_8254 *subpriv = s->private;
+       unsigned int val;
+
+       /* latch counter */
+       val = chan << 6;
+       dio200_write8(dev, subpriv->ofs + i8254_control_reg, val);
+       /* read lsb, msb */
+       val = dio200_read8(dev, subpriv->ofs + chan);
+       val += dio200_read8(dev, subpriv->ofs + chan) << 8;
+       return val;
+}
+
+/*
+ * Write an '8254' subdevice channel.
+ */
+static void
+dio200_subdev_8254_write_chan(struct comedi_device *dev,
+                             struct comedi_subdevice *s, unsigned int chan,
+                             unsigned int count)
+{
+       struct dio200_subdev_8254 *subpriv = s->private;
+
+       /* write lsb, msb */
+       dio200_write8(dev, subpriv->ofs + chan, count & 0xff);
+       dio200_write8(dev, subpriv->ofs + chan, (count >> 8) & 0xff);
+}
+
+/*
+ * Set mode of an '8254' subdevice channel.
+ */
+static void
+dio200_subdev_8254_set_mode(struct comedi_device *dev,
+                           struct comedi_subdevice *s, unsigned int chan,
+                           unsigned int mode)
+{
+       struct dio200_subdev_8254 *subpriv = s->private;
+       unsigned int byte;
+
+       byte = chan << 6;
+       byte |= 0x30;           /* access order: lsb, msb */
+       byte |= (mode & 0xf);   /* counter mode and BCD|binary */
+       dio200_write8(dev, subpriv->ofs + i8254_control_reg, byte);
+}
+
+/*
+ * Read status byte of an '8254' counter subdevice channel.
+ */
+static unsigned int
+dio200_subdev_8254_status(struct comedi_device *dev,
+                         struct comedi_subdevice *s, unsigned int chan)
+{
+       struct dio200_subdev_8254 *subpriv = s->private;
+
+       /* latch status */
+       dio200_write8(dev, subpriv->ofs + i8254_control_reg,
+                     0xe0 | (2 << chan));
+       /* read status */
+       return dio200_read8(dev, subpriv->ofs + chan);
+}
+
+/*
+ * Handle 'insn_read' for an '8254' counter subdevice.
+ */
+static int
+dio200_subdev_8254_read(struct comedi_device *dev, struct comedi_subdevice *s,
+                       struct comedi_insn *insn, unsigned int *data)
+{
+       struct dio200_subdev_8254 *subpriv = s->private;
+       int chan = CR_CHAN(insn->chanspec);
+       unsigned int n;
+       unsigned long flags;
+
+       for (n = 0; n < insn->n; n++) {
+               spin_lock_irqsave(&subpriv->spinlock, flags);
+               data[n] = dio200_subdev_8254_read_chan(dev, s, chan);
+               spin_unlock_irqrestore(&subpriv->spinlock, flags);
+       }
+       return insn->n;
+}
+
+/*
+ * Handle 'insn_write' for an '8254' counter subdevice.
+ */
+static int
+dio200_subdev_8254_write(struct comedi_device *dev, struct comedi_subdevice *s,
+                        struct comedi_insn *insn, unsigned int *data)
+{
+       struct dio200_subdev_8254 *subpriv = s->private;
+       int chan = CR_CHAN(insn->chanspec);
+       unsigned int n;
+       unsigned long flags;
+
+       for (n = 0; n < insn->n; n++) {
+               spin_lock_irqsave(&subpriv->spinlock, flags);
+               dio200_subdev_8254_write_chan(dev, s, chan, data[n]);
+               spin_unlock_irqrestore(&subpriv->spinlock, flags);
+       }
+       return insn->n;
+}
+
+/*
+ * Set gate source for an '8254' counter subdevice channel.
+ */
+static int
+dio200_subdev_8254_set_gate_src(struct comedi_device *dev,
+                               struct comedi_subdevice *s,
+                               unsigned int counter_number,
+                               unsigned int gate_src)
+{
+       const struct dio200_layout *layout = dio200_dev_layout(dev);
+       struct dio200_subdev_8254 *subpriv = s->private;
+       unsigned char byte;
+
+       if (!layout->has_clk_gat_sce)
+               return -1;
+       if (counter_number > 2)
+               return -1;
+       if (gate_src > (layout->has_enhancements ? 31 : 7))
+               return -1;
+
+       subpriv->gate_src[counter_number] = gate_src;
+       byte = gat_sce(subpriv->which, counter_number, gate_src);
+       dio200_write8(dev, subpriv->gat_sce_ofs, byte);
+
+       return 0;
+}
+
+/*
+ * Get gate source for an '8254' counter subdevice channel.
+ */
+static int
+dio200_subdev_8254_get_gate_src(struct comedi_device *dev,
+                               struct comedi_subdevice *s,
+                               unsigned int counter_number)
+{
+       const struct dio200_layout *layout = dio200_dev_layout(dev);
+       struct dio200_subdev_8254 *subpriv = s->private;
+
+       if (!layout->has_clk_gat_sce)
+               return -1;
+       if (counter_number > 2)
+               return -1;
+
+       return subpriv->gate_src[counter_number];
+}
+
+/*
+ * Set clock source for an '8254' counter subdevice channel.
+ */
+static int
+dio200_subdev_8254_set_clock_src(struct comedi_device *dev,
+                                struct comedi_subdevice *s,
+                                unsigned int counter_number,
+                                unsigned int clock_src)
+{
+       const struct dio200_layout *layout = dio200_dev_layout(dev);
+       struct dio200_subdev_8254 *subpriv = s->private;
+       unsigned char byte;
+
+       if (!layout->has_clk_gat_sce)
+               return -1;
+       if (counter_number > 2)
+               return -1;
+       if (clock_src > (layout->has_enhancements ? 31 : 7))
+               return -1;
+
+       subpriv->clock_src[counter_number] = clock_src;
+       byte = clk_sce(subpriv->which, counter_number, clock_src);
+       dio200_write8(dev, subpriv->clk_sce_ofs, byte);
+
+       return 0;
+}
+
+/*
+ * Get clock source for an '8254' counter subdevice channel.
+ */
+static int
+dio200_subdev_8254_get_clock_src(struct comedi_device *dev,
+                                struct comedi_subdevice *s,
+                                unsigned int counter_number,
+                                unsigned int *period_ns)
+{
+       const struct dio200_layout *layout = dio200_dev_layout(dev);
+       struct dio200_subdev_8254 *subpriv = s->private;
+       unsigned clock_src;
+
+       if (!layout->has_clk_gat_sce)
+               return -1;
+       if (counter_number > 2)
+               return -1;
+
+       clock_src = subpriv->clock_src[counter_number];
+       *period_ns = clock_period[clock_src];
+       return clock_src;
+}
+
+/*
+ * Handle 'insn_config' for an '8254' counter subdevice.
+ */
+static int
+dio200_subdev_8254_config(struct comedi_device *dev, struct comedi_subdevice *s,
+                         struct comedi_insn *insn, unsigned int *data)
+{
+       struct dio200_subdev_8254 *subpriv = s->private;
+       int ret = 0;
+       int chan = CR_CHAN(insn->chanspec);
+       unsigned long flags;
+
+       spin_lock_irqsave(&subpriv->spinlock, flags);
+       switch (data[0]) {
+       case INSN_CONFIG_SET_COUNTER_MODE:
+               if (data[1] > (I8254_MODE5 | I8254_BINARY))
+                       ret = -EINVAL;
+               else
+                       dio200_subdev_8254_set_mode(dev, s, chan, data[1]);
+               break;
+       case INSN_CONFIG_8254_READ_STATUS:
+               data[1] = dio200_subdev_8254_status(dev, s, chan);
+               break;
+       case INSN_CONFIG_SET_GATE_SRC:
+               ret = dio200_subdev_8254_set_gate_src(dev, s, chan, data[2]);
+               if (ret < 0)
+                       ret = -EINVAL;
+               break;
+       case INSN_CONFIG_GET_GATE_SRC:
+               ret = dio200_subdev_8254_get_gate_src(dev, s, chan);
+               if (ret < 0) {
+                       ret = -EINVAL;
+                       break;
+               }
+               data[2] = ret;
+               break;
+       case INSN_CONFIG_SET_CLOCK_SRC:
+               ret = dio200_subdev_8254_set_clock_src(dev, s, chan, data[1]);
+               if (ret < 0)
+                       ret = -EINVAL;
+               break;
+       case INSN_CONFIG_GET_CLOCK_SRC:
+               ret = dio200_subdev_8254_get_clock_src(dev, s, chan, &data[2]);
+               if (ret < 0) {
+                       ret = -EINVAL;
+                       break;
+               }
+               data[1] = ret;
+               break;
+       default:
+               ret = -EINVAL;
+               break;
+       }
+       spin_unlock_irqrestore(&subpriv->spinlock, flags);
+       return ret < 0 ? ret : insn->n;
+}
+
+/*
+ * This function initializes an '8254' counter subdevice.
+ */
+static int
+dio200_subdev_8254_init(struct comedi_device *dev, struct comedi_subdevice *s,
+                       unsigned int offset)
+{
+       const struct dio200_layout *layout = dio200_dev_layout(dev);
+       struct dio200_subdev_8254 *subpriv;
+       unsigned int chan;
+
+       subpriv = kzalloc(sizeof(*subpriv), GFP_KERNEL);
+       if (!subpriv)
+               return -ENOMEM;
+
+       s->private = subpriv;
+       s->type = COMEDI_SUBD_COUNTER;
+       s->subdev_flags = SDF_WRITABLE | SDF_READABLE;
+       s->n_chan = 3;
+       s->maxdata = 0xFFFF;
+       s->insn_read = dio200_subdev_8254_read;
+       s->insn_write = dio200_subdev_8254_write;
+       s->insn_config = dio200_subdev_8254_config;
+
+       spin_lock_init(&subpriv->spinlock);
+       subpriv->ofs = offset;
+       if (layout->has_clk_gat_sce) {
+               /* Derive CLK_SCE and GAT_SCE register offsets from
+                * 8254 offset. */
+               subpriv->clk_sce_ofs = DIO200_XCLK_SCE + (offset >> 3);
+               subpriv->gat_sce_ofs = DIO200_XGAT_SCE + (offset >> 3);
+               subpriv->which = (offset >> 2) & 1;
+       }
+
+       /* Initialize channels. */
+       for (chan = 0; chan < 3; chan++) {
+               dio200_subdev_8254_set_mode(dev, s, chan,
+                                           I8254_MODE0 | I8254_BINARY);
+               if (layout->has_clk_gat_sce) {
+                       /* Gate source 0 is VCC (logic 1). */
+                       dio200_subdev_8254_set_gate_src(dev, s, chan, 0);
+                       /* Clock source 0 is the dedicated clock input. */
+                       dio200_subdev_8254_set_clock_src(dev, s, chan, 0);
+               }
+       }
+
+       return 0;
+}
+
+/*
+ * This function cleans up an '8254' counter subdevice.
+ */
+static void
+dio200_subdev_8254_cleanup(struct comedi_device *dev,
+                          struct comedi_subdevice *s)
+{
+       struct dio200_subdev_intr *subpriv = s->private;
+       kfree(subpriv);
+}
+
+/*
+ * This function sets I/O directions for an '8255' DIO subdevice.
+ */
+static void dio200_subdev_8255_set_dir(struct comedi_device *dev,
+                                      struct comedi_subdevice *s)
+{
+       struct dio200_subdev_8255 *subpriv = s->private;
+       int config;
+
+       config = CR_CW;
+       /* 1 in io_bits indicates output, 1 in config indicates input */
+       if (!(s->io_bits & 0x0000ff))
+               config |= CR_A_IO;
+       if (!(s->io_bits & 0x00ff00))
+               config |= CR_B_IO;
+       if (!(s->io_bits & 0x0f0000))
+               config |= CR_C_LO_IO;
+       if (!(s->io_bits & 0xf00000))
+               config |= CR_C_HI_IO;
+       dio200_write8(dev, subpriv->ofs + 3, config);
+}
+
+/*
+ * Handle 'insn_bits' for an '8255' DIO subdevice.
+ */
+static int dio200_subdev_8255_bits(struct comedi_device *dev,
+                                  struct comedi_subdevice *s,
+                                  struct comedi_insn *insn, unsigned int *data)
+{
+       struct dio200_subdev_8255 *subpriv = s->private;
+
+       if (data[0]) {
+               s->state &= ~data[0];
+               s->state |= (data[0] & data[1]);
+               if (data[0] & 0xff)
+                       dio200_write8(dev, subpriv->ofs, s->state & 0xff);
+               if (data[0] & 0xff00)
+                       dio200_write8(dev, subpriv->ofs + 1,
+                                     (s->state >> 8) & 0xff);
+               if (data[0] & 0xff0000)
+                       dio200_write8(dev, subpriv->ofs + 2,
+                                     (s->state >> 16) & 0xff);
+       }
+       data[1] = dio200_read8(dev, subpriv->ofs);
+       data[1] |= dio200_read8(dev, subpriv->ofs + 1) << 8;
+       data[1] |= dio200_read8(dev, subpriv->ofs + 2) << 16;
+       return 2;
+}
+
+/*
+ * Handle 'insn_config' for an '8255' DIO subdevice.
+ */
+static int dio200_subdev_8255_config(struct comedi_device *dev,
+                                    struct comedi_subdevice *s,
+                                    struct comedi_insn *insn,
+                                    unsigned int *data)
+{
+       unsigned int mask;
+       unsigned int bits;
+
+       mask = 1 << CR_CHAN(insn->chanspec);
+       if (mask & 0x0000ff)
+               bits = 0x0000ff;
+       else if (mask & 0x00ff00)
+               bits = 0x00ff00;
+       else if (mask & 0x0f0000)
+               bits = 0x0f0000;
+       else
+               bits = 0xf00000;
+       switch (data[0]) {
+       case INSN_CONFIG_DIO_INPUT:
+               s->io_bits &= ~bits;
+               break;
+       case INSN_CONFIG_DIO_OUTPUT:
+               s->io_bits |= bits;
+               break;
+       case INSN_CONFIG_DIO_QUERY:
+               data[1] = (s->io_bits & bits) ? COMEDI_OUTPUT : COMEDI_INPUT;
+               return insn->n;
+               break;
+       default:
+               return -EINVAL;
+       }
+       dio200_subdev_8255_set_dir(dev, s);
+       return 1;
+}
+
+/*
+ * This function initializes an '8255' DIO subdevice.
+ *
+ * offset is the offset to the 8255 chip.
+ */
+static int dio200_subdev_8255_init(struct comedi_device *dev,
+                                  struct comedi_subdevice *s,
+                                  unsigned int offset)
+{
+       struct dio200_subdev_8255 *subpriv;
+
+       subpriv = kzalloc(sizeof(*subpriv), GFP_KERNEL);
+       if (!subpriv)
+               return -ENOMEM;
+       subpriv->ofs = offset;
+       s->private = subpriv;
+       s->type = COMEDI_SUBD_DIO;
+       s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
+       s->n_chan = 24;
+       s->range_table = &range_digital;
+       s->maxdata = 1;
+       s->insn_bits = dio200_subdev_8255_bits;
+       s->insn_config = dio200_subdev_8255_config;
+       s->state = 0;
+       s->io_bits = 0;
+       dio200_subdev_8255_set_dir(dev, s);
+       return 0;
+}
+
+/*
+ * This function cleans up an '8255' DIO subdevice.
+ */
+static void dio200_subdev_8255_cleanup(struct comedi_device *dev,
+                                      struct comedi_subdevice *s)
+{
+       struct dio200_subdev_8255 *subpriv = s->private;
+
+       kfree(subpriv);
+}
+
+/*
+ * Handle 'insn_read' for a timer subdevice.
+ */
+static int dio200_subdev_timer_read(struct comedi_device *dev,
+                                   struct comedi_subdevice *s,
+                                   struct comedi_insn *insn,
+                                   unsigned int *data)
+{
+       unsigned int n;
+
+       for (n = 0; n < insn->n; n++)
+               data[n] = dio200_read32(dev, DIO200_TS_COUNT);
+       return n;
+}
+
+/*
+ * Reset timer subdevice.
+ */
+static void dio200_subdev_timer_reset(struct comedi_device *dev,
+                                     struct comedi_subdevice *s)
+{
+       unsigned int clock;
+
+       clock = dio200_read32(dev, DIO200_TS_CONFIG) & TS_CONFIG_CLK_SRC_MASK;
+       dio200_write32(dev, DIO200_TS_CONFIG, clock | TS_CONFIG_RESET);
+       dio200_write32(dev, DIO200_TS_CONFIG, clock);
+}
+
+/*
+ * Get timer subdevice clock source and period.
+ */
+static void dio200_subdev_timer_get_clock_src(struct comedi_device *dev,
+                                             struct comedi_subdevice *s,
+                                             unsigned int *src,
+                                             unsigned int *period)
+{
+       unsigned int clk;
+
+       clk = dio200_read32(dev, DIO200_TS_CONFIG) & TS_CONFIG_CLK_SRC_MASK;
+       *src = clk;
+       *period = (clk < ARRAY_SIZE(ts_clock_period)) ?
+                 ts_clock_period[clk] : 0;
+}
+
+/*
+ * Set timer subdevice clock source.
+ */
+static int dio200_subdev_timer_set_clock_src(struct comedi_device *dev,
+                                            struct comedi_subdevice *s,
+                                            unsigned int src)
+{
+       if (src > TS_CONFIG_MAX_CLK_SRC)
+               return -EINVAL;
+       dio200_write32(dev, DIO200_TS_CONFIG, src);
+       return 0;
+}
+
+/*
+ * Handle 'insn_config' for a timer subdevice.
+ */
+static int dio200_subdev_timer_config(struct comedi_device *dev,
+                                     struct comedi_subdevice *s,
+                                     struct comedi_insn *insn,
+                                     unsigned int *data)
+{
+       int ret = 0;
+
+       switch (data[0]) {
+       case INSN_CONFIG_RESET:
+               dio200_subdev_timer_reset(dev, s);
+               break;
+       case INSN_CONFIG_SET_CLOCK_SRC:
+               ret = dio200_subdev_timer_set_clock_src(dev, s, data[1]);
+               if (ret < 0)
+                       ret = -EINVAL;
+               break;
+       case INSN_CONFIG_GET_CLOCK_SRC:
+               dio200_subdev_timer_get_clock_src(dev, s, &data[1], &data[2]);
+               break;
+       default:
+               ret = -EINVAL;
+               break;
+       }
+       return ret < 0 ? ret : insn->n;
+}
+
+/*
+ * This function initializes a timer subdevice.
+ *
+ * Uses the timestamp timer registers.  There is only one timestamp timer.
+ */
+static int dio200_subdev_timer_init(struct comedi_device *dev,
+                                   struct comedi_subdevice *s)
+{
+       s->type = COMEDI_SUBD_TIMER;
+       s->subdev_flags = SDF_READABLE | SDF_LSAMPL;
+       s->n_chan = 1;
+       s->maxdata = 0xFFFFFFFF;
+       s->insn_read = dio200_subdev_timer_read;
+       s->insn_config = dio200_subdev_timer_config;
+       return 0;
+}
+
+/*
+ * This function cleans up a timer subdevice.
+ */
+static void dio200_subdev_timer_cleanup(struct comedi_device *dev,
+                                       struct comedi_subdevice *s)
+{
+       /* Nothing to do. */
+}
+
+void amplc_dio200_set_enhance(struct comedi_device *dev, unsigned char val)
+{
+       dio200_write8(dev, DIO200_ENHANCE, val);
+}
+EXPORT_SYMBOL_GPL(amplc_dio200_set_enhance);
+
+int amplc_dio200_common_attach(struct comedi_device *dev, unsigned int irq,
+                              unsigned long req_irq_flags)
+{
+       const struct dio200_board *thisboard = comedi_board(dev);
+       struct dio200_private *devpriv = dev->private;
+       const struct dio200_layout *layout = dio200_board_layout(thisboard);
+       struct comedi_subdevice *s;
+       int sdx;
+       unsigned int n;
+       int ret;
+
+       devpriv->intr_sd = -1;
+
+       ret = comedi_alloc_subdevices(dev, layout->n_subdevs);
+       if (ret)
+               return ret;
+
+       for (n = 0; n < dev->n_subdevices; n++) {
+               s = &dev->subdevices[n];
+               switch (layout->sdtype[n]) {
+               case sd_8254:
+                       /* counter subdevice (8254) */
+                       ret = dio200_subdev_8254_init(dev, s,
+                                                     layout->sdinfo[n]);
+                       if (ret < 0)
+                               return ret;
+                       break;
+               case sd_8255:
+                       /* digital i/o subdevice (8255) */
+                       ret = dio200_subdev_8255_init(dev, s,
+                                                     layout->sdinfo[n]);
+                       if (ret < 0)
+                               return ret;
+                       break;
+               case sd_intr:
+                       /* 'INTERRUPT' subdevice */
+                       if (irq) {
+                               ret = dio200_subdev_intr_init(dev, s,
+                                                             DIO200_INT_SCE,
+                                                             layout->sdinfo[n]
+                                                            );
+                               if (ret < 0)
+                                       return ret;
+                               devpriv->intr_sd = n;
+                       } else {
+                               s->type = COMEDI_SUBD_UNUSED;
+                       }
+                       break;
+               case sd_timer:
+                       ret = dio200_subdev_timer_init(dev, s);
+                       if (ret < 0)
+                               return ret;
+                       break;
+               default:
+                       s->type = COMEDI_SUBD_UNUSED;
+                       break;
+               }
+       }
+       sdx = devpriv->intr_sd;
+       if (sdx >= 0 && sdx < dev->n_subdevices)
+               dev->read_subdev = &dev->subdevices[sdx];
+       if (irq) {
+               if (request_irq(irq, dio200_interrupt, req_irq_flags,
+                               dev->board_name, dev) >= 0) {
+                       dev->irq = irq;
+               } else {
+                       dev_warn(dev->class_dev,
+                                "warning! irq %u unavailable!\n", irq);
+               }
+       }
+       dev_info(dev->class_dev, "attached\n");
+       return 0;
+}
+EXPORT_SYMBOL_GPL(amplc_dio200_common_attach);
+
+void amplc_dio200_common_detach(struct comedi_device *dev)
+{
+       const struct dio200_board *thisboard = comedi_board(dev);
+       struct dio200_private *devpriv = dev->private;
+       const struct dio200_layout *layout;
+       unsigned n;
+
+       if (!thisboard || !devpriv)
+               return;
+       if (dev->irq)
+               free_irq(dev->irq, dev);
+       if (dev->subdevices) {
+               layout = dio200_board_layout(thisboard);
+               for (n = 0; n < dev->n_subdevices; n++) {
+                       struct comedi_subdevice *s = &dev->subdevices[n];
+                       switch (layout->sdtype[n]) {
+                       case sd_8254:
+                               dio200_subdev_8254_cleanup(dev, s);
+                               break;
+                       case sd_8255:
+                               dio200_subdev_8255_cleanup(dev, s);
+                               break;
+                       case sd_intr:
+                               dio200_subdev_intr_cleanup(dev, s);
+                               break;
+                       case sd_timer:
+                               dio200_subdev_timer_cleanup(dev, s);
+                               break;
+                       default:
+                               break;
+                       }
+               }
+       }
+}
+EXPORT_SYMBOL_GPL(amplc_dio200_common_detach);
+
+static int __init amplc_dio200_common_init(void)
+{
+       return 0;
+}
+module_init(amplc_dio200_common_init);
+
+static void __exit amplc_dio200_common_exit(void)
+{
+}
+module_exit(amplc_dio200_common_exit);
+
+MODULE_AUTHOR("Comedi http://www.comedi.org");
+MODULE_DESCRIPTION("Comedi helper for amplc_dio200 and amplc_dio200_pci");
+MODULE_LICENSE("GPL");
diff --git a/drivers/staging/comedi/drivers/amplc_dio200_pci.c b/drivers/staging/comedi/drivers/amplc_dio200_pci.c
new file mode 100644 (file)
index 0000000..55b6efd
--- /dev/null
@@ -0,0 +1,492 @@
+/* comedi/drivers/amplc_dio200_pci.c
+
+    Driver for Amplicon PCI215, PCI272, PCIe215, PCIe236, PCIe296.
+
+    Copyright (C) 2005-2013 MEV Ltd. <http://www.mev.co.uk/>
+
+    COMEDI - Linux Control and Measurement Device Interface
+    Copyright (C) 1998,2000 David A. Schleef <ds@schleef.org>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+/*
+ * Driver: amplc_dio200_pci
+ * Description: Amplicon 200 Series PCI Digital I/O
+ * Author: Ian Abbott <abbotti@mev.co.uk>
+ * Devices: [Amplicon] PCI215 (amplc_dio200_pci), PCIe215, PCIe236,
+ *   PCI272, PCIe296
+ * Updated: Mon, 18 Mar 2013 15:03:50 +0000
+ * Status: works
+ *
+ * Configuration options:
+ *   none
+ *
+ * Manual configuration of PCI(e) cards is not supported; they are configured
+ * automatically.
+ *
+ * SUBDEVICES
+ *
+ *                     PCI215         PCIe215        PCIe236
+ *                  -------------  -------------  -------------
+ *   Subdevices           5              8              8
+ *    0                 PPI-X          PPI-X          PPI-X
+ *    1                 PPI-Y          UNUSED         UNUSED
+ *    2                 CTR-Z1         PPI-Y          UNUSED
+ *    3                 CTR-Z2         UNUSED         UNUSED
+ *    4               INTERRUPT        CTR-Z1         CTR-Z1
+ *    5                                CTR-Z2         CTR-Z2
+ *    6                                TIMER          TIMER
+ *    7                              INTERRUPT      INTERRUPT
+ *
+ *
+ *                     PCI272         PCIe296
+ *                  -------------  -------------
+ *   Subdevices           4              8
+ *    0                 PPI-X          PPI-X1
+ *    1                 PPI-Y          PPI-X2
+ *    2                 PPI-Z          PPI-Y1
+ *    3               INTERRUPT        PPI-Y2
+ *    4                                CTR-Z1
+ *    5                                CTR-Z2
+ *    6                                TIMER
+ *    7                              INTERRUPT
+ *
+ * Each PPI is a 8255 chip providing 24 DIO channels.  The DIO channels
+ * are configurable as inputs or outputs in four groups:
+ *
+ *   Port A  - channels  0 to  7
+ *   Port B  - channels  8 to 15
+ *   Port CL - channels 16 to 19
+ *   Port CH - channels 20 to 23
+ *
+ * Only mode 0 of the 8255 chips is supported.
+ *
+ * Each CTR is a 8254 chip providing 3 16-bit counter channels.  Each
+ * channel is configured individually with INSN_CONFIG instructions.  The
+ * specific type of configuration instruction is specified in data[0].
+ * Some configuration instructions expect an additional parameter in
+ * data[1]; others return a value in data[1].  The following configuration
+ * instructions are supported:
+ *
+ *   INSN_CONFIG_SET_COUNTER_MODE.  Sets the counter channel's mode and
+ *     BCD/binary setting specified in data[1].
+ *
+ *   INSN_CONFIG_8254_READ_STATUS.  Reads the status register value for the
+ *     counter channel into data[1].
+ *
+ *   INSN_CONFIG_SET_CLOCK_SRC.  Sets the counter channel's clock source as
+ *     specified in data[1] (this is a hardware-specific value).  Not
+ *     supported on PC214E.  For the other boards, valid clock sources are
+ *     0 to 7 as follows:
+ *
+ *       0.  CLK n, the counter channel's dedicated CLK input from the SK1
+ *         connector.  (N.B. for other values, the counter channel's CLKn
+ *         pin on the SK1 connector is an output!)
+ *       1.  Internal 10 MHz clock.
+ *       2.  Internal 1 MHz clock.
+ *       3.  Internal 100 kHz clock.
+ *       4.  Internal 10 kHz clock.
+ *       5.  Internal 1 kHz clock.
+ *       6.  OUT n-1, the output of counter channel n-1 (see note 1 below).
+ *       7.  Ext Clock, the counter chip's dedicated Ext Clock input from
+ *         the SK1 connector.  This pin is shared by all three counter
+ *         channels on the chip.
+ *
+ *     For the PCIe boards, clock sources in the range 0 to 31 are allowed
+ *     and the following additional clock sources are defined:
+ *
+ *       8.  HIGH logic level.
+ *       9.  LOW logic level.
+ *      10.  "Pattern present" signal.
+ *      11.  Internal 20 MHz clock.
+ *
+ *   INSN_CONFIG_GET_CLOCK_SRC.  Returns the counter channel's current
+ *     clock source in data[1].  For internal clock sources, data[2] is set
+ *     to the period in ns.
+ *
+ *   INSN_CONFIG_SET_GATE_SRC.  Sets the counter channel's gate source as
+ *     specified in data[2] (this is a hardware-specific value).  Not
+ *     supported on PC214E.  For the other boards, valid gate sources are 0
+ *     to 7 as follows:
+ *
+ *       0.  VCC (internal +5V d.c.), i.e. gate permanently enabled.
+ *       1.  GND (internal 0V d.c.), i.e. gate permanently disabled.
+ *       2.  GAT n, the counter channel's dedicated GAT input from the SK1
+ *         connector.  (N.B. for other values, the counter channel's GATn
+ *         pin on the SK1 connector is an output!)
+ *       3.  /OUT n-2, the inverted output of counter channel n-2 (see note
+ *         2 below).
+ *       4.  Reserved.
+ *       5.  Reserved.
+ *       6.  Reserved.
+ *       7.  Reserved.
+ *
+ *     For the PCIe boards, gate sources in the range 0 to 31 are allowed;
+ *     the following additional clock sources and clock sources 6 and 7 are
+ *     (re)defined:
+ *
+ *       6.  /GAT n, negated version of the counter channel's dedicated
+ *         GAT input (negated version of gate source 2).
+ *       7.  OUT n-2, the non-inverted output of counter channel n-2
+ *         (negated version of gate source 3).
+ *       8.  "Pattern present" signal, HIGH while pattern present.
+ *       9.  "Pattern occurred" latched signal, latches HIGH when pattern
+ *         occurs.
+ *      10.  "Pattern gone away" latched signal, latches LOW when pattern
+ *         goes away after it occurred.
+ *      11.  Negated "pattern present" signal, LOW while pattern present
+ *         (negated version of gate source 8).
+ *      12.  Negated "pattern occurred" latched signal, latches LOW when
+ *         pattern occurs (negated version of gate source 9).
+ *      13.  Negated "pattern gone away" latched signal, latches LOW when
+ *         pattern goes away after it occurred (negated version of gate
+ *         source 10).
+ *
+ *   INSN_CONFIG_GET_GATE_SRC.  Returns the counter channel's current gate
+ *     source in data[2].
+ *
+ * Clock and gate interconnection notes:
+ *
+ *   1.  Clock source OUT n-1 is the output of the preceding channel on the
+ *   same counter subdevice if n > 0, or the output of channel 2 on the
+ *   preceding counter subdevice (see note 3) if n = 0.
+ *
+ *   2.  Gate source /OUT n-2 is the inverted output of channel 0 on the
+ *   same counter subdevice if n = 2, or the inverted output of channel n+1
+ *   on the preceding counter subdevice (see note 3) if n < 2.
+ *
+ *   3.  The counter subdevices are connected in a ring, so the highest
+ *   counter subdevice precedes the lowest.
+ *
+ * The 'TIMER' subdevice is a free-running 32-bit timer subdevice.
+ *
+ * The 'INTERRUPT' subdevice pretends to be a digital input subdevice.  The
+ * digital inputs come from the interrupt status register.  The number of
+ * channels matches the number of interrupt sources.  The PC214E does not
+ * have an interrupt status register; see notes on 'INTERRUPT SOURCES'
+ * below.
+ *
+ * INTERRUPT SOURCES
+ *
+ *                     PCI215         PCIe215        PCIe236
+ *                  -------------  -------------  -------------
+ *   Sources              6              6              6
+ *    0               PPI-X-C0       PPI-X-C0       PPI-X-C0
+ *    1               PPI-X-C3       PPI-X-C3       PPI-X-C3
+ *    2               PPI-Y-C0       PPI-Y-C0        unused
+ *    3               PPI-Y-C3       PPI-Y-C3        unused
+ *    4              CTR-Z1-OUT1    CTR-Z1-OUT1    CTR-Z1-OUT1
+ *    5              CTR-Z2-OUT1    CTR-Z2-OUT1    CTR-Z2-OUT1
+ *
+ *                     PCI272         PCIe296
+ *                  -------------  -------------
+ *   Sources              6              6
+ *    0               PPI-X-C0       PPI-X1-C0
+ *    1               PPI-X-C3       PPI-X1-C3
+ *    2               PPI-Y-C0       PPI-Y1-C0
+ *    3               PPI-Y-C3       PPI-Y1-C3
+ *    4               PPI-Z-C0      CTR-Z1-OUT1
+ *    5               PPI-Z-C3      CTR-Z2-OUT1
+ *
+ * When an interrupt source is enabled in the interrupt source enable
+ * register, a rising edge on the source signal latches the corresponding
+ * bit to 1 in the interrupt status register.
+ *
+ * When the interrupt status register value as a whole (actually, just the
+ * 6 least significant bits) goes from zero to non-zero, the board will
+ * generate an interrupt.  The interrupt will remain asserted until the
+ * interrupt status register is cleared to zero.  To clear a bit to zero in
+ * the interrupt status register, the corresponding interrupt source must
+ * be disabled in the interrupt source enable register (there is no
+ * separate interrupt clear register).
+ *
+ * COMMANDS
+ *
+ * The driver supports a read streaming acquisition command on the
+ * 'INTERRUPT' subdevice.  The channel list selects the interrupt sources
+ * to be enabled.  All channels will be sampled together (convert_src ==
+ * TRIG_NOW).  The scan begins a short time after the hardware interrupt
+ * occurs, subject to interrupt latencies (scan_begin_src == TRIG_EXT,
+ * scan_begin_arg == 0).  The value read from the interrupt status register
+ * is packed into a short value, one bit per requested channel, in the
+ * order they appear in the channel list.
+ */
+
+#include <linux/pci.h>
+#include <linux/interrupt.h>
+#include <linux/slab.h>
+
+#include "../comedidev.h"
+
+#include "amplc_dio200.h"
+
+/* PCI IDs */
+#define PCI_DEVICE_ID_AMPLICON_PCI272 0x000a
+#define PCI_DEVICE_ID_AMPLICON_PCI215 0x000b
+#define PCI_DEVICE_ID_AMPLICON_PCIE236 0x0011
+#define PCI_DEVICE_ID_AMPLICON_PCIE215 0x0012
+#define PCI_DEVICE_ID_AMPLICON_PCIE296 0x0014
+
+/*
+ * Board descriptions.
+ */
+
+enum dio200_pci_model {
+       pci215_model,
+       pci272_model,
+       pcie215_model,
+       pcie236_model,
+       pcie296_model
+};
+
+static const struct dio200_board dio200_pci_boards[] = {
+       [pci215_model] {
+               .name = "pci215",
+               .bustype = pci_bustype,
+               .mainbar = 2,
+               .mainsize = DIO200_IO_SIZE,
+               .layout = {
+                       .n_subdevs = 5,
+                       .sdtype = {sd_8255, sd_8255, sd_8254, sd_8254, sd_intr},
+                       .sdinfo = {0x00, 0x08, 0x10, 0x14, 0x3F},
+                       .has_int_sce = true,
+                       .has_clk_gat_sce = true,
+               },
+       },
+       [pci272_model] {
+               .name = "pci272",
+               .bustype = pci_bustype,
+               .mainbar = 2,
+               .mainsize = DIO200_IO_SIZE,
+               .layout = {
+                       .n_subdevs = 4,
+                       .sdtype = {sd_8255, sd_8255, sd_8255, sd_intr},
+                       .sdinfo = {0x00, 0x08, 0x10, 0x3F},
+                       .has_int_sce = true,
+               },
+       },
+       [pcie215_model] {
+               .name = "pcie215",
+               .bustype = pci_bustype,
+               .mainbar = 1,
+               .mainshift = 3,
+               .mainsize = DIO200_PCIE_IO_SIZE,
+               .layout = {
+                       .n_subdevs = 8,
+                       .sdtype = {sd_8255, sd_none, sd_8255, sd_none,
+                                  sd_8254, sd_8254, sd_timer, sd_intr},
+                       .sdinfo = {0x00, 0x00, 0x08, 0x00,
+                                  0x10, 0x14, 0x00, 0x3F},
+                       .has_int_sce = true,
+                       .has_clk_gat_sce = true,
+                       .has_enhancements = true,
+               },
+       },
+       [pcie236_model] {
+               .name = "pcie236",
+               .bustype = pci_bustype,
+               .mainbar = 1,
+               .mainshift = 3,
+               .mainsize = DIO200_PCIE_IO_SIZE,
+               .layout = {
+                       .n_subdevs = 8,
+                       .sdtype = {sd_8255, sd_none, sd_none, sd_none,
+                                  sd_8254, sd_8254, sd_timer, sd_intr},
+                       .sdinfo = {0x00, 0x00, 0x00, 0x00,
+                                  0x10, 0x14, 0x00, 0x3F},
+                       .has_int_sce = true,
+                       .has_clk_gat_sce = true,
+                       .has_enhancements = true,
+               },
+       },
+       [pcie296_model] {
+               .name = "pcie296",
+               .bustype = pci_bustype,
+               .mainbar = 1,
+               .mainshift = 3,
+               .mainsize = DIO200_PCIE_IO_SIZE,
+               .layout = {
+                       .n_subdevs = 8,
+                       .sdtype = {sd_8255, sd_8255, sd_8255, sd_8255,
+                                  sd_8254, sd_8254, sd_timer, sd_intr},
+                       .sdinfo = {0x00, 0x04, 0x08, 0x0C,
+                                  0x10, 0x14, 0x00, 0x3F},
+                       .has_int_sce = true,
+                       .has_clk_gat_sce = true,
+                       .has_enhancements = true,
+               },
+       },
+};
+
+/*
+ * This function does some special set-up for the PCIe boards
+ * PCIe215, PCIe236, PCIe296.
+ */
+static int dio200_pcie_board_setup(struct comedi_device *dev)
+{
+       struct pci_dev *pcidev = comedi_to_pci_dev(dev);
+       void __iomem *brbase;
+       resource_size_t brlen;
+
+       /*
+        * The board uses Altera Cyclone IV with PCI-Express hard IP.
+        * The FPGA configuration has the PCI-Express Avalon-MM Bridge
+        * Control registers in PCI BAR 0, offset 0, and the length of
+        * these registers is 0x4000.
+        *
+        * We need to write 0x80 to the "Avalon-MM to PCI-Express Interrupt
+        * Enable" register at offset 0x50 to allow generation of PCIe
+        * interrupts when RXmlrq_i is asserted in the SOPC Builder system.
+        */
+       brlen = pci_resource_len(pcidev, 0);
+       if (brlen < 0x4000 ||
+                       !(pci_resource_flags(pcidev, 0) & IORESOURCE_MEM)) {
+               dev_err(dev->class_dev, "error! bad PCI region!\n");
+               return -EINVAL;
+       }
+       brbase = ioremap_nocache(pci_resource_start(pcidev, 0), brlen);
+       if (!brbase) {
+               dev_err(dev->class_dev, "error! failed to map registers!\n");
+               return -ENOMEM;
+       }
+       writel(0x80, brbase + 0x50);
+       iounmap(brbase);
+       /* Enable "enhanced" features of board. */
+       amplc_dio200_set_enhance(dev, 1);
+       return 0;
+}
+
+static int dio200_pci_auto_attach(struct comedi_device *dev,
+                                 unsigned long context_model)
+{
+       struct pci_dev *pci_dev = comedi_to_pci_dev(dev);
+       const struct dio200_board *thisboard = NULL;
+       struct dio200_private *devpriv;
+       resource_size_t base, len;
+       unsigned int bar;
+       int ret;
+
+       if (context_model < ARRAY_SIZE(dio200_pci_boards))
+               thisboard = &dio200_pci_boards[context_model];
+       if (!thisboard)
+               return -EINVAL;
+       dev->board_ptr = thisboard;
+       dev->board_name = thisboard->name;
+
+       dev_info(dev->class_dev, "%s: attach pci %s (%s)\n",
+                dev->driver->driver_name, pci_name(pci_dev), dev->board_name);
+
+       devpriv = kzalloc(sizeof(*devpriv), GFP_KERNEL);
+       if (!devpriv)
+               return -ENOMEM;
+       dev->private = devpriv;
+
+       ret = comedi_pci_enable(dev);
+       if (ret)
+               return ret;
+
+       bar = thisboard->mainbar;
+       base = pci_resource_start(pci_dev, bar);
+       len = pci_resource_len(pci_dev, bar);
+       if (len < thisboard->mainsize) {
+               dev_err(dev->class_dev, "error! PCI region size too small!\n");
+               return -EINVAL;
+       }
+       if (pci_resource_flags(pci_dev, bar) & IORESOURCE_MEM) {
+               devpriv->io.u.membase = ioremap_nocache(base, len);
+               if (!devpriv->io.u.membase) {
+                       dev_err(dev->class_dev,
+                               "error! cannot remap registers\n");
+                       return -ENOMEM;
+               }
+               devpriv->io.regtype = mmio_regtype;
+       } else {
+               devpriv->io.u.iobase = (unsigned long)base;
+               devpriv->io.regtype = io_regtype;
+       }
+       switch (context_model) {
+       case pcie215_model:
+       case pcie236_model:
+       case pcie296_model:
+               ret = dio200_pcie_board_setup(dev);
+               if (ret < 0)
+                       return ret;
+               break;
+       default:
+               break;
+       }
+       return amplc_dio200_common_attach(dev, pci_dev->irq, IRQF_SHARED);
+}
+
+static void dio200_pci_detach(struct comedi_device *dev)
+{
+       const struct dio200_board *thisboard = comedi_board(dev);
+       struct dio200_private *devpriv = dev->private;
+
+       if (!thisboard || !devpriv)
+               return;
+       amplc_dio200_common_detach(dev);
+       if (devpriv->io.regtype == mmio_regtype)
+               iounmap(devpriv->io.u.membase);
+       comedi_pci_disable(dev);
+}
+
+static struct comedi_driver dio200_pci_comedi_driver = {
+       .driver_name = "amplc_dio200_pci",
+       .module = THIS_MODULE,
+       .auto_attach = dio200_pci_auto_attach,
+       .detach = dio200_pci_detach,
+};
+
+static DEFINE_PCI_DEVICE_TABLE(dio200_pci_table) = {
+       {
+               PCI_VDEVICE(AMPLICON, PCI_DEVICE_ID_AMPLICON_PCI215),
+               pci215_model
+       }, {
+               PCI_VDEVICE(AMPLICON, PCI_DEVICE_ID_AMPLICON_PCI272),
+               pci272_model
+       }, {
+               PCI_VDEVICE(AMPLICON, PCI_DEVICE_ID_AMPLICON_PCIE236),
+               pcie236_model
+       }, {
+               PCI_VDEVICE(AMPLICON, PCI_DEVICE_ID_AMPLICON_PCIE215),
+               pcie215_model
+       }, {
+               PCI_VDEVICE(AMPLICON, PCI_DEVICE_ID_AMPLICON_PCIE296),
+               pcie296_model
+       },
+       {0}
+};
+
+MODULE_DEVICE_TABLE(pci, dio200_pci_table);
+
+static int dio200_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
+{
+       return comedi_pci_auto_config(dev, &dio200_pci_comedi_driver,
+                                     id->driver_data);
+}
+
+static struct pci_driver dio200_pci_pci_driver = {
+       .name = "amplc_dio200_pci",
+       .id_table = dio200_pci_table,
+       .probe = dio200_pci_probe,
+       .remove = comedi_pci_auto_unconfig,
+};
+module_comedi_pci_driver(dio200_pci_comedi_driver, dio200_pci_pci_driver);
+
+MODULE_AUTHOR("Comedi http://www.comedi.org");
+MODULE_DESCRIPTION("Comedi driver for Amplicon 200 Series PCI(e) DIO boards");
+MODULE_LICENSE("GPL");