diff options
| -rw-r--r-- | drivers/scsi/NCR5380.c | 77 | ||||
| -rw-r--r-- | drivers/scsi/NCR5380.h | 11 | ||||
| -rw-r--r-- | drivers/scsi/g_NCR5380.c | 52 | ||||
| -rw-r--r-- | drivers/scsi/g_NCR5380.h | 2 |
4 files changed, 54 insertions, 88 deletions
diff --git a/drivers/scsi/NCR5380.c b/drivers/scsi/NCR5380.c index d849ffa378b1..4f5ca794bb71 100644 --- a/drivers/scsi/NCR5380.c +++ b/drivers/scsi/NCR5380.c @@ -97,9 +97,6 @@ * and macros and include this file in your driver. * * These macros control options : - * AUTOPROBE_IRQ - if defined, the NCR5380_probe_irq() function will be - * defined. - * * AUTOSENSE - if defined, REQUEST SENSE will be performed automatically * for commands that return with a CHECK CONDITION status. * @@ -127,9 +124,7 @@ * NCR5380_dma_residual - residual byte count * * The generic driver is initialized by calling NCR5380_init(instance), - * after setting the appropriate host specific fields and ID. If the - * driver wishes to autoprobe for an IRQ line, the NCR5380_probe_irq(instance, - * possible) function may be used. + * after setting the appropriate host specific fields and ID. */ #ifndef NCR5380_io_delay @@ -351,76 +346,6 @@ static void NCR5380_print_phase(struct Scsi_Host *instance) } #endif - -static int probe_irq; - -/** - * probe_intr - helper for IRQ autoprobe - * @irq: interrupt number - * @dev_id: unused - * @regs: unused - * - * Set a flag to indicate the IRQ in question was received. This is - * used by the IRQ probe code. - */ - -static irqreturn_t probe_intr(int irq, void *dev_id) -{ - probe_irq = irq; - return IRQ_HANDLED; -} - -/** - * NCR5380_probe_irq - find the IRQ of an NCR5380 - * @instance: NCR5380 controller - * @possible: bitmask of ISA IRQ lines - * - * Autoprobe for the IRQ line used by the NCR5380 by triggering an IRQ - * and then looking to see what interrupt actually turned up. - */ - -static int __maybe_unused NCR5380_probe_irq(struct Scsi_Host *instance, - int possible) -{ - struct NCR5380_hostdata *hostdata = shost_priv(instance); - unsigned long timeout; - int trying_irqs, i, mask; - - for (trying_irqs = 0, i = 1, mask = 2; i < 16; ++i, mask <<= 1) - if ((mask & possible) && (request_irq(i, &probe_intr, 0, "NCR-probe", NULL) == 0)) - trying_irqs |= mask; - - timeout = jiffies + msecs_to_jiffies(250); - probe_irq = NO_IRQ; - - /* - * A interrupt is triggered whenever BSY = false, SEL = true - * and a bit set in the SELECT_ENABLE_REG is asserted on the - * SCSI bus. - * - * Note that the bus is only driven when the phase control signals - * (I/O, C/D, and MSG) match those in the TCR, so we must reset that - * to zero. - */ - - NCR5380_write(TARGET_COMMAND_REG, 0); - NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask); - NCR5380_write(OUTPUT_DATA_REG, hostdata->id_mask); - NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_DATA | ICR_ASSERT_SEL); - - while (probe_irq == NO_IRQ && time_before(jiffies, timeout)) - schedule_timeout_uninterruptible(1); - - NCR5380_write(SELECT_ENABLE_REG, 0); - NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE); - - for (i = 1, mask = 2; i < 16; ++i, mask <<= 1) - if (trying_irqs & mask) - free_irq(i, NULL); - - return probe_irq; -} - /** * NCR58380_info - report driver and host information * @instance: relevant scsi host instance diff --git a/drivers/scsi/NCR5380.h b/drivers/scsi/NCR5380.h index 3c6ce5434449..51a3567a6fb2 100644 --- a/drivers/scsi/NCR5380.h +++ b/drivers/scsi/NCR5380.h @@ -199,16 +199,6 @@ #define PHASE_SR_TO_TCR(phase) ((phase) >> 2) -/* - * These are "special" values for the irq and dma_channel fields of the - * Scsi_Host structure - */ - -#define DMA_NONE 255 -#define IRQ_AUTO 254 -#define DMA_AUTO 254 -#define PORT_AUTO 0xffff /* autoprobe io port for 53c400a */ - #ifndef NO_IRQ #define NO_IRQ 0 #endif @@ -290,7 +280,6 @@ static void NCR5380_print(struct Scsi_Host *instance); #define NCR5380_dprint_phase(flg, arg) do {} while (0) #endif -static int NCR5380_probe_irq(struct Scsi_Host *instance, int possible); static int NCR5380_init(struct Scsi_Host *instance, int flags); static int NCR5380_maybe_reset_bus(struct Scsi_Host *); static void NCR5380_exit(struct Scsi_Host *instance); diff --git a/drivers/scsi/g_NCR5380.c b/drivers/scsi/g_NCR5380.c index 76e37455480e..6d245a7b9363 100644 --- a/drivers/scsi/g_NCR5380.c +++ b/drivers/scsi/g_NCR5380.c @@ -67,6 +67,56 @@ MODULE_PARM_DESC(card, "card type (0=NCR5380, 1=NCR53C400, 2=NCR53C400A, 3=DTC31 MODULE_ALIAS("g_NCR5380_mmio"); MODULE_LICENSE("GPL"); +static void g_NCR5380_trigger_irq(struct Scsi_Host *instance) +{ + struct NCR5380_hostdata *hostdata = shost_priv(instance); + + /* + * An interrupt is triggered whenever BSY = false, SEL = true + * and a bit set in the SELECT_ENABLE_REG is asserted on the + * SCSI bus. + * + * Note that the bus is only driven when the phase control signals + * (I/O, C/D, and MSG) match those in the TCR. + */ + NCR5380_write(TARGET_COMMAND_REG, + PHASE_SR_TO_TCR(NCR5380_read(STATUS_REG) & PHASE_MASK)); + NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask); + NCR5380_write(OUTPUT_DATA_REG, hostdata->id_mask); + NCR5380_write(INITIATOR_COMMAND_REG, + ICR_BASE | ICR_ASSERT_DATA | ICR_ASSERT_SEL); + + msleep(1); + + NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE); + NCR5380_write(SELECT_ENABLE_REG, 0); + NCR5380_write(TARGET_COMMAND_REG, 0); +} + +/** + * g_NCR5380_probe_irq - find the IRQ of a NCR5380 or equivalent + * @instance: SCSI host instance + * + * Autoprobe for the IRQ line used by the card by triggering an IRQ + * and then looking to see what interrupt actually turned up. + */ + +static int g_NCR5380_probe_irq(struct Scsi_Host *instance) +{ + struct NCR5380_hostdata *hostdata = shost_priv(instance); + int irq_mask, irq; + + NCR5380_read(RESET_PARITY_INTERRUPT_REG); + irq_mask = probe_irq_on(); + g_NCR5380_trigger_irq(instance); + irq = probe_irq_off(irq_mask); + NCR5380_read(RESET_PARITY_INTERRUPT_REG); + + if (irq <= 0) + return NO_IRQ; + return irq; +} + /* * Configure I/O address of 53C400A or DTC436 by writing magic numbers * to ports 0x779 and 0x379. @@ -272,7 +322,7 @@ static int generic_NCR5380_init_one(struct scsi_host_template *tpnt, if (irq != IRQ_AUTO) instance->irq = irq; else - instance->irq = NCR5380_probe_irq(instance, 0xffff); + instance->irq = g_NCR5380_probe_irq(instance); /* Compatibility with documented NCR5380 kernel parameters */ if (instance->irq == 255) diff --git a/drivers/scsi/g_NCR5380.h b/drivers/scsi/g_NCR5380.h index 3ce5b65ccb00..81b22d989648 100644 --- a/drivers/scsi/g_NCR5380.h +++ b/drivers/scsi/g_NCR5380.h @@ -51,4 +51,6 @@ #define BOARD_DTC3181E 3 #define BOARD_HP_C2502 4 +#define IRQ_AUTO 254 + #endif /* GENERIC_NCR5380_H */ |