[PATCH] ide: CS5535 driver
authorJaya Kumar <jayakumar.ide@gmail.com>
Wed, 9 Nov 2005 22:58:16 +0000 (23:58 +0100)
committerBartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Wed, 9 Nov 2005 22:58:16 +0000 (23:58 +0100)
Signed-off-by: Jaya Kumar <jayakumar.ide@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
drivers/ide/Kconfig
drivers/ide/pci/Makefile
drivers/ide/pci/cs5535.c [new file with mode: 0644]
include/linux/pci_ids.h

index a737886..42e5b81 100644 (file)
@@ -539,6 +539,15 @@ config BLK_DEV_CS5530
 
          It is safe to say Y to this question.
 
+config BLK_DEV_CS5535
+       tristate "AMD CS5535 chipset support"
+       depends on X86 && !X86_64
+       help
+         Include support for UDMA on the NSC/AMD CS5535 companion chipset.
+         This will automatically be detected and configured if found.
+
+         It is safe to say Y to this question.
+
 config BLK_DEV_HPT34X
        tristate "HPT34X chipset support"
        help
index af46226..f35d684 100644 (file)
@@ -6,6 +6,7 @@ obj-$(CONFIG_BLK_DEV_ATIIXP)            += atiixp.o
 obj-$(CONFIG_BLK_DEV_CMD64X)           += cmd64x.o
 obj-$(CONFIG_BLK_DEV_CS5520)           += cs5520.o
 obj-$(CONFIG_BLK_DEV_CS5530)           += cs5530.o
+obj-$(CONFIG_BLK_DEV_CS5535)           += cs5535.o
 obj-$(CONFIG_BLK_DEV_SC1200)           += sc1200.o
 obj-$(CONFIG_BLK_DEV_CY82C693)         += cy82c693.o
 obj-$(CONFIG_BLK_DEV_HPT34X)           += hpt34x.o
diff --git a/drivers/ide/pci/cs5535.c b/drivers/ide/pci/cs5535.c
new file mode 100644 (file)
index 0000000..6eb3051
--- /dev/null
@@ -0,0 +1,305 @@
+/*
+ * linux/drivers/ide/pci/cs5535.c
+ *
+ * Copyright (C) 2004-2005 Advanced Micro Devices, Inc.
+ *
+ * History:
+ * 09/20/2005 - Jaya Kumar <jayakumar.ide@gmail.com>
+ * - Reworked tuneproc, set_drive, misc mods to prep for mainline
+ * - Work was sponsored by CIS (M) Sdn Bhd.
+ * Ported to Kernel 2.6.11 on June 26, 2005 by
+ *   Wolfgang Zuleger <wolfgang.zuleger@gmx.de>
+ *   Alexander Kiausch <alex.kiausch@t-online.de>
+ * Originally developed by AMD for 2.4/2.6
+ *
+ * Development of this chipset driver was funded
+ * by the nice folks at National Semiconductor/AMD.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * Documentation:
+ *  CS5535 documentation available from AMD
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/ide.h>
+
+#include "ide-timing.h"
+
+#define MSR_ATAC_BASE          0x51300000
+#define ATAC_GLD_MSR_CAP       (MSR_ATAC_BASE+0)
+#define ATAC_GLD_MSR_CONFIG    (MSR_ATAC_BASE+0x01)
+#define ATAC_GLD_MSR_SMI       (MSR_ATAC_BASE+0x02)
+#define ATAC_GLD_MSR_ERROR     (MSR_ATAC_BASE+0x03)
+#define ATAC_GLD_MSR_PM                (MSR_ATAC_BASE+0x04)
+#define ATAC_GLD_MSR_DIAG      (MSR_ATAC_BASE+0x05)
+#define ATAC_IO_BAR            (MSR_ATAC_BASE+0x08)
+#define ATAC_RESET             (MSR_ATAC_BASE+0x10)
+#define ATAC_CH0D0_PIO         (MSR_ATAC_BASE+0x20)
+#define ATAC_CH0D0_DMA         (MSR_ATAC_BASE+0x21)
+#define ATAC_CH0D1_PIO         (MSR_ATAC_BASE+0x22)
+#define ATAC_CH0D1_DMA         (MSR_ATAC_BASE+0x23)
+#define ATAC_PCI_ABRTERR       (MSR_ATAC_BASE+0x24)
+#define ATAC_BM0_CMD_PRIM      0x00
+#define ATAC_BM0_STS_PRIM      0x02
+#define ATAC_BM0_PRD           0x04
+#define CS5535_CABLE_DETECT    0x48
+
+/* Format I PIO settings. We seperate out cmd and data for safer timings */
+
+static unsigned int cs5535_pio_cmd_timings[5] =
+{ 0xF7F4, 0x53F3, 0x13F1, 0x5131, 0x1131 };
+static unsigned int cs5535_pio_dta_timings[5] =
+{ 0xF7F4, 0xF173, 0x8141, 0x5131, 0x1131 };
+
+static unsigned int cs5535_mwdma_timings[3] =
+{ 0x7F0FFFF3, 0x7F035352, 0x7f024241 };
+
+static unsigned int cs5535_udma_timings[5] =
+{ 0x7F7436A1, 0x7F733481, 0x7F723261, 0x7F713161, 0x7F703061 };
+
+/* Macros to check if the register is the reset value -  reset value is an
+   invalid timing and indicates the register has not been set previously */
+
+#define CS5535_BAD_PIO(timings) ( (timings&~0x80000000UL) == 0x00009172 )
+#define CS5535_BAD_DMA(timings) ( (timings & 0x000FFFFF) == 0x00077771 )
+
+/****
+ *     cs5535_set_speed         -     Configure the chipset to the new speed
+ *     @drive: Drive to set up
+ *     @speed: desired speed
+ *
+ *     cs5535_set_speed() configures the chipset to a new speed.
+ */
+static void cs5535_set_speed(ide_drive_t *drive, u8 speed)
+{
+
+       u32 reg = 0, dummy;
+       int unit = drive->select.b.unit;
+
+
+       /* Set the PIO timings */
+       if ((speed & XFER_MODE) == XFER_PIO) {
+               u8 pioa;
+               u8 piob;
+               u8 cmd;
+
+               pioa = speed - XFER_PIO_0;
+               piob = ide_get_best_pio_mode(&(drive->hwif->drives[!unit]),
+                                               255, 4, NULL);
+               cmd = pioa < piob ? pioa : piob;
+
+               /* Write the speed of the current drive */
+               reg = (cs5535_pio_cmd_timings[cmd] << 16) |
+                       cs5535_pio_dta_timings[pioa];
+               wrmsr(unit ? ATAC_CH0D1_PIO : ATAC_CH0D0_PIO, reg, 0);
+
+               /* And if nessesary - change the speed of the other drive */
+               rdmsr(unit ?  ATAC_CH0D0_PIO : ATAC_CH0D1_PIO, reg, dummy);
+
+               if (((reg >> 16) & cs5535_pio_cmd_timings[cmd]) !=
+                       cs5535_pio_cmd_timings[cmd]) {
+                       reg &= 0x0000FFFF;
+                       reg |= cs5535_pio_cmd_timings[cmd] << 16;
+                       wrmsr(unit ? ATAC_CH0D0_PIO : ATAC_CH0D1_PIO, reg, 0);
+               }
+
+               /* Set bit 31 of the DMA register for PIO format 1 timings */
+               rdmsr(unit ?  ATAC_CH0D1_DMA : ATAC_CH0D0_DMA, reg, dummy);
+               wrmsr(unit ? ATAC_CH0D1_DMA : ATAC_CH0D0_DMA,
+                                       reg | 0x80000000UL, 0);
+       } else {
+               rdmsr(unit ? ATAC_CH0D1_DMA : ATAC_CH0D0_DMA, reg, dummy);
+
+               reg &= 0x80000000UL;  /* Preserve the PIO format bit */
+
+               if (speed >= XFER_UDMA_0 && speed <= XFER_UDMA_7)
+                       reg |= cs5535_udma_timings[speed - XFER_UDMA_0];
+               else if (speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2)
+                       reg |= cs5535_mwdma_timings[speed - XFER_MW_DMA_0];
+               else
+                       return;
+
+               wrmsr(unit ? ATAC_CH0D1_DMA : ATAC_CH0D0_DMA, reg, 0);
+       }
+}
+
+static u8 cs5535_ratemask(ide_drive_t *drive)
+{
+       /* eighty93 will return 1 if it's 80core and capable of
+       exceeding udma2, 0 otherwise. we need ratemask to set
+       the max speed and if we can > udma2 then we return 2
+       which selects speed_max as udma4 which is the 5535's max
+       speed, and 1 selects udma2 which is the max for 40c */
+       if (!eighty_ninty_three(drive))
+               return 1;
+
+       return 2;
+}
+
+
+/****
+ *     cs5535_set_drive         -     Configure the drive to the new speed
+ *     @drive: Drive to set up
+ *     @speed: desired speed
+ *
+ *     cs5535_set_drive() configures the drive and the chipset to a
+ *     new speed. It also can be called by upper layers.
+ */
+static int cs5535_set_drive(ide_drive_t *drive, u8 speed)
+{
+       speed = ide_rate_filter(cs5535_ratemask(drive), speed);
+       ide_config_drive_speed(drive, speed);
+       cs5535_set_speed(drive, speed);
+
+       return 0;
+}
+
+/****
+ *     cs5535_tuneproc    -       PIO setup
+ *     @drive: drive to set up
+ *     @pio: mode to use (255 for 'best possible')
+ *
+ *     A callback from the upper layers for PIO-only tuning.
+ */
+static void cs5535_tuneproc(ide_drive_t *drive, u8 xferspeed)
+{
+       u8 modes[] = {  XFER_PIO_0, XFER_PIO_1, XFER_PIO_2, XFER_PIO_3,
+                       XFER_PIO_4 };
+
+       /* cs5535 max pio is pio 4, best_pio will check the blacklist.
+       i think we don't need to rate_filter the incoming xferspeed
+       since we know we're only going to choose pio */
+       xferspeed = ide_get_best_pio_mode(drive, xferspeed, 4, NULL);
+       ide_config_drive_speed(drive, modes[xferspeed]);
+       cs5535_set_speed(drive, xferspeed);
+}
+
+static int cs5535_config_drive_for_dma(ide_drive_t *drive)
+{
+       u8 speed;
+
+       speed = ide_dma_speed(drive, cs5535_ratemask(drive));
+
+       /* If no DMA speed was available then let dma_check hit pio */
+       if (!speed) {
+               return 0;
+       }
+
+       cs5535_set_drive(drive, speed);
+       return ide_dma_enable(drive);
+}
+
+static int cs5535_dma_check(ide_drive_t *drive)
+{
+       ide_hwif_t *hwif        = drive->hwif;
+       struct hd_driveid *id   = drive->id;
+       u8 speed;
+
+       drive->init_speed = 0;
+
+       if ((id->capability & 1) && drive->autodma) {
+               if (ide_use_dma(drive)) {
+                       if (cs5535_config_drive_for_dma(drive))
+                               return hwif->ide_dma_on(drive);
+               }
+
+               goto fast_ata_pio;
+
+       } else if ((id->capability & 8) || (id->field_valid & 2)) {
+fast_ata_pio:
+               speed = ide_get_best_pio_mode(drive, 255, 4, NULL);
+               cs5535_set_drive(drive, speed);
+               return hwif->ide_dma_off_quietly(drive);
+       }
+       /* IORDY not supported */
+       return 0;
+}
+
+static u8 __devinit cs5535_cable_detect(struct pci_dev *dev)
+{
+       u8 bit;
+
+       /* if a 80 wire cable was detected */
+       pci_read_config_byte(dev, CS5535_CABLE_DETECT, &bit);
+       return (bit & 1);
+}
+
+/****
+ *     init_hwif_cs5535        -       Initialize one ide cannel
+ *     @hwif: Channel descriptor
+ *
+ *     This gets invoked by the IDE driver once for each channel. It
+ *     performs channel-specific pre-initialization before drive probing.
+ *
+ */
+static void __devinit init_hwif_cs5535(ide_hwif_t *hwif)
+{
+       int i;
+
+       hwif->autodma = 0;
+
+       hwif->tuneproc = &cs5535_tuneproc;
+       hwif->speedproc = &cs5535_set_drive;
+       hwif->ide_dma_check = &cs5535_dma_check;
+
+       hwif->atapi_dma = 1;
+       hwif->ultra_mask = 0x1F;
+       hwif->mwdma_mask = 0x07;
+
+
+       hwif->udma_four = cs5535_cable_detect(hwif->pci_dev);
+
+       if (!noautodma)
+               hwif->autodma = 1;
+
+       /* just setting autotune and not worrying about bios timings */
+       for (i = 0; i < 2; i++) {
+               hwif->drives[i].autotune = 1;
+               hwif->drives[i].autodma = hwif->autodma;
+       }
+}
+
+static ide_pci_device_t cs5535_chipset __devinitdata = {
+       .name           = "CS5535",
+       .init_hwif      = init_hwif_cs5535,
+       .channels       = 1,
+       .autodma        = AUTODMA,
+       .bootable       = ON_BOARD,
+};
+
+static int __devinit cs5535_init_one(struct pci_dev *dev,
+                                       const struct pci_device_id *id)
+{
+       return ide_setup_pci_device(dev, &cs5535_chipset);
+}
+
+static struct pci_device_id cs5535_pci_tbl[] =
+{
+       { PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_CS5535_IDE, PCI_ANY_ID,
+               PCI_ANY_ID, 0, 0, 0},
+       { 0, },
+};
+
+MODULE_DEVICE_TABLE(pci, cs5535_pci_tbl);
+
+static struct pci_driver driver = {
+       .name       = "CS5535_IDE",
+       .id_table   = cs5535_pci_tbl,
+       .probe      = cs5535_init_one,
+};
+
+static int __init cs5535_ide_init(void)
+{
+       return ide_pci_register_driver(&driver);
+}
+
+module_init(cs5535_ide_init);
+
+MODULE_AUTHOR("AMD");
+MODULE_DESCRIPTION("PCI driver module for AMD/NS CS5535 IDE");
+MODULE_LICENSE("GPL");
index 63dd184..4e06eb0 100644 (file)
 #define PCI_DEVICE_ID_NS_SC1100_SMI    0x0511
 #define PCI_DEVICE_ID_NS_SC1100_XBUS   0x0515
 #define PCI_DEVICE_ID_NS_87410         0xd001
+#define PCI_DEVICE_ID_NS_CS5535_IDE    0x002d
 
 #define PCI_VENDOR_ID_TSENG            0x100c
 #define PCI_DEVICE_ID_TSENG_W32P_2     0x3202