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authorFinn Thain <fthain@telegraphics.com.au>2016-01-03 16:05:11 +1100
committerMartin K. Petersen <martin.petersen@oracle.com>2016-01-06 21:42:53 -0500
commit9c3f0e2b52ada30fe72beec27b83e91e12566609 (patch)
treeb8b44d2c48773e66374b5de37eefeea52f8b9d36 /drivers/scsi/atari_scsi.c
parent636b1ec8575a60fb305ad6e3ede5e79d287754b6 (diff)
downloadlinux-9c3f0e2b52ada30fe72beec27b83e91e12566609.tar.bz2
atari_NCR5380: Remove RESET_BOOT, CONFIG_ATARI_SCSI_TOSHIBA_DELAY and CONFIG_ATARI_SCSI_RESET_BOOT
The atari_NCR5380.c core driver now takes care of bus reset upon driver initialization if required (same as NCR5380.c). Move the Toshiba CD-ROM support into the core driver, enabled with a host flag, so that all NCR5380 drivers can make use of it. Drop the RESET_BOOT macros and the ATARI_SCSI_RESET_BOOT and ATARI_SCSI_TOSHIBA_DELAY Kconfig symbols, which are now redundant. Remove the atari_scsi_reset_boot(), mac_scsi_reset_boot() and sun3_scsi_reset_boot() routines. None of this duplicated code is needed now that all drivers can use NCR5380_maybe_reset_bus(). This brings atari_scsi, mac_scsi and sun3_scsi into line with all of the other NCR5380 drivers. The bus reset may raise an interrupt. That would be new behaviour for atari_scsi only when CONFIG_ATARI_SCSI_RESET_BOOT=n. The ST DMA interrupt is not assigned to atari_scsi at this stage, so CONFIG_ATARI_SCSI_RESET_BOOT=y may well be problematic already. Regardless, do_reset() now raises and clears the interrupt within local_irq_save/restore which should avoid problems. Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Reviewed-by: Hannes Reinecke <hare@suse.com> Tested-by: Ondrej Zary <linux@rainbow-software.org> Tested-by: Michael Schmitz <schmitzmic@gmail.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/atari_scsi.c')
-rw-r--r--drivers/scsi/atari_scsi.c60
1 files changed, 9 insertions, 51 deletions
diff --git a/drivers/scsi/atari_scsi.c b/drivers/scsi/atari_scsi.c
index 1852ed6e8a48..5b233ccae962 100644
--- a/drivers/scsi/atari_scsi.c
+++ b/drivers/scsi/atari_scsi.c
@@ -164,15 +164,6 @@ static inline unsigned long SCSI_DMA_GETADR(void)
#define HOSTDATA_DMALEN (((struct NCR5380_hostdata *) \
(atari_scsi_host->hostdata))->dma_len)
-/* Time (in jiffies) to wait after a reset; the SCSI standard calls for 250ms,
- * we usually do 0.5s to be on the safe side. But Toshiba CD-ROMs once more
- * need ten times the standard value... */
-#ifndef CONFIG_ATARI_SCSI_TOSHIBA_DELAY
-#define AFTER_RESET_DELAY (HZ/2)
-#else
-#define AFTER_RESET_DELAY (5*HZ/2)
-#endif
-
#ifdef REAL_DMA
static void atari_scsi_fetch_restbytes(void);
#endif
@@ -208,12 +199,12 @@ static int setup_cmd_per_lun = -1;
module_param(setup_cmd_per_lun, int, 0);
static int setup_sg_tablesize = -1;
module_param(setup_sg_tablesize, int, 0);
-#ifdef SUPPORT_TAGS
static int setup_use_tagged_queuing = -1;
module_param(setup_use_tagged_queuing, int, 0);
-#endif
static int setup_hostid = -1;
module_param(setup_hostid, int, 0);
+static int setup_toshiba_delay = -1;
+module_param(setup_toshiba_delay, int, 0);
#if defined(REAL_DMA)
@@ -488,7 +479,7 @@ static int __init atari_scsi_setup(char *str)
* Defaults depend on TT or Falcon, determined at run time.
* Negative values mean don't change.
*/
- int ints[6];
+ int ints[8];
get_options(str, ARRAY_SIZE(ints), ints);
@@ -504,10 +495,11 @@ static int __init atari_scsi_setup(char *str)
setup_sg_tablesize = ints[3];
if (ints[0] >= 4)
setup_hostid = ints[4];
-#ifdef SUPPORT_TAGS
if (ints[0] >= 5)
setup_use_tagged_queuing = ints[5];
-#endif
+ /* ints[6] (use_pdma) is ignored */
+ if (ints[0] >= 7)
+ setup_toshiba_delay = ints[7];
return 1;
}
@@ -516,38 +508,6 @@ __setup("atascsi=", atari_scsi_setup);
#endif /* !MODULE */
-#ifdef CONFIG_ATARI_SCSI_RESET_BOOT
-static void __init atari_scsi_reset_boot(void)
-{
- unsigned long end;
-
- /*
- * Do a SCSI reset to clean up the bus during initialization. No messing
- * with the queues, interrupts, or locks necessary here.
- */
-
- printk("Atari SCSI: resetting the SCSI bus...");
-
- /* get in phase */
- NCR5380_write(TARGET_COMMAND_REG,
- PHASE_SR_TO_TCR(NCR5380_read(STATUS_REG)));
-
- /* assert RST */
- NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_RST);
- /* The min. reset hold time is 25us, so 40us should be enough */
- udelay(50);
- /* reset RST and interrupt */
- NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
- NCR5380_read(RESET_PARITY_INTERRUPT_REG);
-
- end = jiffies + AFTER_RESET_DELAY;
- while (time_before(jiffies, end))
- barrier();
-
- printk(" done\n");
-}
-#endif
-
#if defined(REAL_DMA)
static unsigned long atari_scsi_dma_setup(struct Scsi_Host *instance,
@@ -917,17 +877,13 @@ static int __init atari_scsi_probe(struct platform_device *pdev)
}
atari_scsi_host = instance;
-#ifdef CONFIG_ATARI_SCSI_RESET_BOOT
- atari_scsi_reset_boot();
-#endif
-
instance->irq = irq->start;
host_flags |= IS_A_TT() ? 0 : FLAG_LATE_DMA_SETUP;
-
#ifdef SUPPORT_TAGS
host_flags |= setup_use_tagged_queuing > 0 ? FLAG_TAGGED_QUEUING : 0;
#endif
+ host_flags |= setup_toshiba_delay > 0 ? FLAG_TOSHIBA_DELAY : 0;
NCR5380_init(instance, host_flags);
@@ -975,6 +931,8 @@ static int __init atari_scsi_probe(struct platform_device *pdev)
#endif
}
+ NCR5380_maybe_reset_bus(instance);
+
error = scsi_add_host(instance, NULL);
if (error)
goto fail_host;