From 54c3ef46572015e05537526304b0d22095821a7f Mon Sep 17 00:00:00 2001 From: H Hartley Sweeten Date: Wed, 3 Dec 2014 11:25:32 -0700 Subject: [PATCH] staging: comedi: hwdrv_apci1500: introduce z8536_read() The Z8536 CIO registers are indirectly read by writing the register offset to the control register then reading the control register to get the value. Introduce a helper function to read the Z8536 CIO registers. The registers are read from "normal" code and in the interrupt handler, spinlock the sequence to protect the indirect register access. Signed-off-by: H Hartley Sweeten Reviewed-by: Ian Abbott Signed-off-by: Greg Kroah-Hartman --- .../comedi/drivers/addi-data/hwdrv_apci1500.c | 222 ++++++--------------- 1 file changed, 58 insertions(+), 164 deletions(-) diff --git a/drivers/staging/comedi/drivers/addi-data/hwdrv_apci1500.c b/drivers/staging/comedi/drivers/addi-data/hwdrv_apci1500.c index bfa9228..594f132 100644 --- a/drivers/staging/comedi/drivers/addi-data/hwdrv_apci1500.c +++ b/drivers/staging/comedi/drivers/addi-data/hwdrv_apci1500.c @@ -129,6 +129,20 @@ static int i_InputChannel; static int i_TimerCounter1Enabled, i_TimerCounter2Enabled, i_WatchdogCounter3Enabled; +static unsigned int z8536_read(struct comedi_device *dev, unsigned int reg) +{ + struct apci1500_private *devpriv = dev->private; + unsigned long flags; + unsigned int val; + + spin_lock_irqsave(&dev->spinlock, flags); + outb(reg, devpriv->iobase + APCI1500_Z8536_CONTROL_REGISTER); + val = inb(devpriv->iobase + APCI1500_Z8536_CONTROL_REGISTER); + spin_unlock_irqrestore(&dev->spinlock, flags); + + return val; +} + /* * An event can be generated for each port. The first event is related to the * first 8 channels (port 1) and the second to the following 6 channels (port 2) @@ -311,14 +325,8 @@ static int apci1500_di_config(struct comedi_device *dev, devpriv->iobase + APCI1500_Z8536_CONTROL_REGISTER); - /* Selects the mode specification mask */ - /* register of port 1 */ - outb(APCI1500_RW_PORT_A_SPECIFICATION, - devpriv->iobase + - APCI1500_Z8536_CONTROL_REGISTER); - i_RegValue = - inb(devpriv->iobase + - APCI1500_Z8536_CONTROL_REGISTER); + i_RegValue = z8536_read(dev, + APCI1500_RW_PORT_A_SPECIFICATION); /* Selects the mode specification mask */ /* register of port 1 */ @@ -366,14 +374,8 @@ static int apci1500_di_config(struct comedi_device *dev, outb(0x74, devpriv->iobase + APCI1500_Z8536_CONTROL_REGISTER); - /* Selects the mode specification mask */ - /* register of port B */ - outb(APCI1500_RW_PORT_B_SPECIFICATION, - devpriv->iobase + - APCI1500_Z8536_CONTROL_REGISTER); - i_RegValue = - inb(devpriv->iobase + - APCI1500_Z8536_CONTROL_REGISTER); + i_RegValue = z8536_read(dev, + APCI1500_RW_PORT_B_SPECIFICATION); /* Selects the mode specification mask */ /* register of port B */ @@ -416,14 +418,8 @@ static int apci1500_di_config(struct comedi_device *dev, devpriv->iobase + APCI1500_Z8536_CONTROL_REGISTER); - /* Selects the mode specification mask */ - /* register of port 2 */ - outb(APCI1500_RW_PORT_B_SPECIFICATION, - devpriv->iobase + - APCI1500_Z8536_CONTROL_REGISTER); - i_RegValue = - inb(devpriv->iobase + - APCI1500_Z8536_CONTROL_REGISTER); + i_RegValue = z8536_read(dev, + APCI1500_RW_PORT_B_SPECIFICATION); /* Selects the mode specification mask */ /* register of port 2 */ outb(APCI1500_RW_PORT_B_SPECIFICATION, @@ -500,12 +496,8 @@ static int apci1500_di_write(struct comedi_device *dev, devpriv->iobase + APCI1500_Z8536_CONTROL_REGISTER); i_Event1InterruptStatus = 1; - outb(APCI1500_RW_PORT_A_SPECIFICATION, - devpriv->iobase + - APCI1500_Z8536_CONTROL_REGISTER); - i_RegValue = - inb(devpriv->iobase + - APCI1500_Z8536_CONTROL_REGISTER); + i_RegValue = z8536_read(dev, + APCI1500_RW_PORT_A_SPECIFICATION); /* Selects the master interrupt control register */ outb(APCI1500_RW_MASTER_INTERRUPT_CONTROL, devpriv->iobase + APCI1500_Z8536_CONTROL_REGISTER); @@ -1068,17 +1060,8 @@ static int apci1500_timer_config(struct comedi_device *dev, devpriv->iobase + APCI1500_Z8536_CONTROL_REGISTER); - /* Selects the master configuration register */ - - outb(APCI1500_RW_MASTER_CONFIGURATION_CONTROL, - devpriv->iobase + - APCI1500_Z8536_CONTROL_REGISTER); - - /* Reads the register */ - - i_MasterConfiguration = - inb(devpriv->iobase + - APCI1500_Z8536_CONTROL_REGISTER); + i_MasterConfiguration = z8536_read(dev, + APCI1500_RW_MASTER_CONFIGURATION_CONTROL); /* Enables timer/counter 1 and triggers timer/counter 1 */ @@ -1228,17 +1211,8 @@ static int apci1500_timer_config(struct comedi_device *dev, devpriv->iobase + APCI1500_Z8536_CONTROL_REGISTER); - /* Selects the master configuration register */ - - outb(APCI1500_RW_MASTER_CONFIGURATION_CONTROL, - devpriv->iobase + - APCI1500_Z8536_CONTROL_REGISTER); - - /* Reads the register */ - - i_MasterConfiguration = - inb(devpriv->iobase + - APCI1500_Z8536_CONTROL_REGISTER); + i_MasterConfiguration = z8536_read(dev, + APCI1500_RW_MASTER_CONFIGURATION_CONTROL); /* Enables timer/counter 2 and triggers timer/counter 2 */ @@ -1382,17 +1356,8 @@ static int apci1500_timer_config(struct comedi_device *dev, devpriv->iobase + APCI1500_Z8536_CONTROL_REGISTER); - /* Selects the master configuration register */ - - outb(APCI1500_RW_MASTER_CONFIGURATION_CONTROL, - devpriv->iobase + - APCI1500_Z8536_CONTROL_REGISTER); - - /* Reads the register */ - - i_MasterConfiguration = - inb(devpriv->iobase + - APCI1500_Z8536_CONTROL_REGISTER); + i_MasterConfiguration = z8536_read(dev, + APCI1500_RW_MASTER_CONFIGURATION_CONTROL); /* Enables watchdog/counter 3 and triggers watchdog/counter 3 */ @@ -1756,21 +1721,12 @@ static int apci1500_timer_bits(struct comedi_device *dev, devpriv->iobase + APCI1500_Z8536_CONTROL_REGISTER); - /* Selects the counter register (high) */ - outb(APCI1500_R_CPT_TMR1_VALUE_HIGH, - devpriv->iobase + - APCI1500_Z8536_CONTROL_REGISTER); - data[0] = - inb(devpriv->iobase + - APCI1500_Z8536_CONTROL_REGISTER); + data[0] = z8536_read(dev, + APCI1500_R_CPT_TMR1_VALUE_HIGH); data[0] = data[0] << 8; data[0] = data[0] & 0xff00; - outb(APCI1500_R_CPT_TMR1_VALUE_LOW, - devpriv->iobase + - APCI1500_Z8536_CONTROL_REGISTER); - data[0] = - data[0] | inb(devpriv->iobase + - APCI1500_Z8536_CONTROL_REGISTER); + data[0] |= z8536_read(dev, + APCI1500_R_CPT_TMR1_VALUE_LOW); } else { dev_warn(dev->class_dev, "Timer/Counter1 not configured\n"); @@ -1798,21 +1754,12 @@ static int apci1500_timer_bits(struct comedi_device *dev, devpriv->iobase + APCI1500_Z8536_CONTROL_REGISTER); - /* Selects the counter register (high) */ - outb(APCI1500_R_CPT_TMR2_VALUE_HIGH, - devpriv->iobase + - APCI1500_Z8536_CONTROL_REGISTER); - data[0] = - inb(devpriv->iobase + - APCI1500_Z8536_CONTROL_REGISTER); + data[0] = z8536_read(dev, + APCI1500_R_CPT_TMR2_VALUE_HIGH); data[0] = data[0] << 8; data[0] = data[0] & 0xff00; - outb(APCI1500_R_CPT_TMR2_VALUE_LOW, - devpriv->iobase + - APCI1500_Z8536_CONTROL_REGISTER); - data[0] = - data[0] | inb(devpriv->iobase + - APCI1500_Z8536_CONTROL_REGISTER); + data[0] |= z8536_read(dev, + APCI1500_R_CPT_TMR2_VALUE_LOW); } else { dev_warn(dev->class_dev, "Timer/Counter2 not configured\n"); @@ -1840,21 +1787,12 @@ static int apci1500_timer_bits(struct comedi_device *dev, devpriv->iobase + APCI1500_Z8536_CONTROL_REGISTER); - /* Selects the counter register (high) */ - outb(APCI1500_R_CPT_TMR3_VALUE_HIGH, - devpriv->iobase + - APCI1500_Z8536_CONTROL_REGISTER); - data[0] = - inb(devpriv->iobase + - APCI1500_Z8536_CONTROL_REGISTER); + data[0] = z8536_read(dev, + APCI1500_R_CPT_TMR3_VALUE_HIGH); data[0] = data[0] << 8; data[0] = data[0] & 0xff00; - outb(APCI1500_R_CPT_TMR3_VALUE_LOW, - devpriv->iobase + - APCI1500_Z8536_CONTROL_REGISTER); - data[0] = - data[0] | inb(devpriv->iobase + - APCI1500_Z8536_CONTROL_REGISTER); + data[0] |= z8536_read(dev, + APCI1500_R_CPT_TMR3_VALUE_LOW); } else { dev_warn(dev->class_dev, "WatchdogCounter3 not configured\n"); @@ -1914,10 +1852,7 @@ static int apci1500_do_bits(struct comedi_device *dev, } } - /* Selects the mode specification register of port B */ - outb(APCI1500_RW_PORT_B_SPECIFICATION, - devpriv->iobase + APCI1500_Z8536_CONTROL_REGISTER); - i_RegValue = inb(devpriv->iobase + APCI1500_Z8536_CONTROL_REGISTER); + i_RegValue = z8536_read(dev, APCI1500_RW_PORT_B_SPECIFICATION); outb(APCI1500_RW_PORT_B_SPECIFICATION, devpriv->iobase + APCI1500_Z8536_CONTROL_REGISTER); /* Writes the new configuration (APCI1500_OR) */ @@ -1942,20 +1877,14 @@ static int apci1500_do_bits(struct comedi_device *dev, devpriv->iobase + APCI1500_Z8536_CONTROL_REGISTER); outb(i_Constant, devpriv->iobase + APCI1500_Z8536_CONTROL_REGISTER); - /* Selects the command and status register of port A */ - outb(APCI1500_RW_PORT_A_COMMAND_AND_STATUS, - devpriv->iobase + APCI1500_Z8536_CONTROL_REGISTER); - i_RegValue = inb(devpriv->iobase + APCI1500_Z8536_CONTROL_REGISTER); + i_RegValue = z8536_read(dev, APCI1500_RW_PORT_A_COMMAND_AND_STATUS); outb(APCI1500_RW_PORT_A_COMMAND_AND_STATUS, devpriv->iobase + APCI1500_Z8536_CONTROL_REGISTER); /* Deletes the interrupt of port A */ i_RegValue = (i_RegValue & 0x0F) | 0x20; outb(i_RegValue, devpriv->iobase + APCI1500_Z8536_CONTROL_REGISTER); - /* Selects the command and status register of port B */ - outb(APCI1500_RW_PORT_B_COMMAND_AND_STATUS, - devpriv->iobase + APCI1500_Z8536_CONTROL_REGISTER); - i_RegValue = inb(devpriv->iobase + APCI1500_Z8536_CONTROL_REGISTER); + i_RegValue = z8536_read(dev, APCI1500_RW_PORT_B_COMMAND_AND_STATUS); outb(APCI1500_RW_PORT_B_COMMAND_AND_STATUS, devpriv->iobase + APCI1500_Z8536_CONTROL_REGISTER); /* Deletes the interrupt of port B */ @@ -1963,10 +1892,7 @@ static int apci1500_do_bits(struct comedi_device *dev, i_RegValue = (i_RegValue & 0x0F) | 0x20; outb(i_RegValue, devpriv->iobase + APCI1500_Z8536_CONTROL_REGISTER); - /* Selects the command and status register of timer 1 */ - outb(APCI1500_RW_CPT_TMR1_CMD_STATUS, - devpriv->iobase + APCI1500_Z8536_CONTROL_REGISTER); - i_RegValue = inb(devpriv->iobase + APCI1500_Z8536_CONTROL_REGISTER); + i_RegValue = z8536_read(dev, APCI1500_RW_CPT_TMR1_CMD_STATUS); outb(APCI1500_RW_CPT_TMR1_CMD_STATUS, devpriv->iobase + APCI1500_Z8536_CONTROL_REGISTER); /* Deletes the interrupt of timer 1 */ @@ -1974,10 +1900,7 @@ static int apci1500_do_bits(struct comedi_device *dev, i_RegValue = (i_RegValue & 0x0F) | 0x20; outb(i_RegValue, devpriv->iobase + APCI1500_Z8536_CONTROL_REGISTER); - /* Selects the command and status register of timer 2 */ - outb(APCI1500_RW_CPT_TMR2_CMD_STATUS, - devpriv->iobase + APCI1500_Z8536_CONTROL_REGISTER); - i_RegValue = inb(devpriv->iobase + APCI1500_Z8536_CONTROL_REGISTER); + i_RegValue = z8536_read(dev, APCI1500_RW_CPT_TMR2_CMD_STATUS); outb(APCI1500_RW_CPT_TMR2_CMD_STATUS, devpriv->iobase + APCI1500_Z8536_CONTROL_REGISTER); /* Deletes the interrupt of timer 2 */ @@ -1985,10 +1908,7 @@ static int apci1500_do_bits(struct comedi_device *dev, i_RegValue = (i_RegValue & 0x0F) | 0x20; outb(i_RegValue, devpriv->iobase + APCI1500_Z8536_CONTROL_REGISTER); - /* Selects the command and status register of timer 3 */ - outb(APCI1500_RW_CPT_TMR3_CMD_STATUS, - devpriv->iobase + APCI1500_Z8536_CONTROL_REGISTER); - i_RegValue = inb(devpriv->iobase + APCI1500_Z8536_CONTROL_REGISTER); + i_RegValue = z8536_read(dev, APCI1500_RW_CPT_TMR3_CMD_STATUS); outb(APCI1500_RW_CPT_TMR3_CMD_STATUS, devpriv->iobase + APCI1500_Z8536_CONTROL_REGISTER); /* Deletes the interrupt of timer 3 */ @@ -2030,11 +1950,8 @@ static irqreturn_t apci1500_interrupt(int irq, void *d) /* Disable all Interrupt */ /* Selects the master interrupt control register */ /* Disables the main interrupt on the board */ - /* Selects the command and status register of port A */ - outb(APCI1500_RW_PORT_A_COMMAND_AND_STATUS, - devpriv->iobase + APCI1500_Z8536_CONTROL_REGISTER); - i_RegValue = - inb(devpriv->iobase + APCI1500_Z8536_CONTROL_REGISTER); + i_RegValue = z8536_read(dev, + APCI1500_RW_PORT_A_COMMAND_AND_STATUS); if ((i_RegValue & 0x60) == 0x60) { /* Selects the command and status register of port A */ outb(APCI1500_RW_PORT_A_COMMAND_AND_STATUS, @@ -2047,20 +1964,11 @@ static irqreturn_t apci1500_interrupt(int irq, void *d) APCI1500_Z8536_CONTROL_REGISTER); i_InterruptMask = i_InterruptMask | 1; if (i_Logic == APCI1500_OR_PRIORITY) { - outb(APCI1500_RW_PORT_A_SPECIFICATION, - devpriv->iobase + - APCI1500_Z8536_CONTROL_REGISTER); - i_RegValue = - inb(devpriv->iobase + - APCI1500_Z8536_CONTROL_REGISTER); + i_RegValue = z8536_read(dev, + APCI1500_RW_PORT_A_SPECIFICATION); - /* Selects the interrupt vector register of port A */ - outb(APCI1500_RW_PORT_A_INTERRUPT_CONTROL, - devpriv->iobase + - APCI1500_Z8536_CONTROL_REGISTER); - i_RegValue = - inb(devpriv->iobase + - APCI1500_Z8536_CONTROL_REGISTER); + i_RegValue = z8536_read(dev, + APCI1500_RW_PORT_A_INTERRUPT_CONTROL); i_InputChannel = 1 + (i_RegValue >> 1); @@ -2069,11 +1977,8 @@ static irqreturn_t apci1500_interrupt(int irq, void *d) } } - /* Selects the command and status register of port B */ - outb(APCI1500_RW_PORT_B_COMMAND_AND_STATUS, - devpriv->iobase + APCI1500_Z8536_CONTROL_REGISTER); - i_RegValue = - inb(devpriv->iobase + APCI1500_Z8536_CONTROL_REGISTER); + i_RegValue = z8536_read(dev, + APCI1500_RW_PORT_B_COMMAND_AND_STATUS); if ((i_RegValue & 0x60) == 0x60) { /* Selects the command and status register of port B */ outb(APCI1500_RW_PORT_B_COMMAND_AND_STATUS, @@ -2111,11 +2016,7 @@ static irqreturn_t apci1500_interrupt(int irq, void *d) } } - /* Selects the command and status register of timer 1 */ - outb(APCI1500_RW_CPT_TMR1_CMD_STATUS, - devpriv->iobase + APCI1500_Z8536_CONTROL_REGISTER); - i_RegValue = - inb(devpriv->iobase + APCI1500_Z8536_CONTROL_REGISTER); + i_RegValue = z8536_read(dev, APCI1500_RW_CPT_TMR1_CMD_STATUS); if ((i_RegValue & 0x60) == 0x60) { /* Selects the command and status register of timer 1 */ outb(APCI1500_RW_CPT_TMR1_CMD_STATUS, @@ -2128,11 +2029,8 @@ static irqreturn_t apci1500_interrupt(int irq, void *d) APCI1500_Z8536_CONTROL_REGISTER); i_InterruptMask = i_InterruptMask | 4; } - /* Selects the command and status register of timer 2 */ - outb(APCI1500_RW_CPT_TMR2_CMD_STATUS, - devpriv->iobase + APCI1500_Z8536_CONTROL_REGISTER); - i_RegValue = - inb(devpriv->iobase + APCI1500_Z8536_CONTROL_REGISTER); + + i_RegValue = z8536_read(dev, APCI1500_RW_CPT_TMR2_CMD_STATUS); if ((i_RegValue & 0x60) == 0x60) { /* Selects the command and status register of timer 2 */ outb(APCI1500_RW_CPT_TMR2_CMD_STATUS, @@ -2146,11 +2044,7 @@ static irqreturn_t apci1500_interrupt(int irq, void *d) i_InterruptMask = i_InterruptMask | 8; } - /* Selects the command and status register of timer 3 */ - outb(APCI1500_RW_CPT_TMR3_CMD_STATUS, - devpriv->iobase + APCI1500_Z8536_CONTROL_REGISTER); - i_RegValue = - inb(devpriv->iobase + APCI1500_Z8536_CONTROL_REGISTER); + i_RegValue = z8536_read(dev, APCI1500_RW_CPT_TMR3_CMD_STATUS); if ((i_RegValue & 0x60) == 0x60) { /* Selects the command and status register of timer 3 */ outb(APCI1500_RW_CPT_TMR3_CMD_STATUS, -- 2.7.4