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authorFinn Thain <fthain@telegraphics.com.au>2008-04-25 10:06:05 -0500
committerJames Bottomley <James.Bottomley@HansenPartnership.com>2008-04-27 12:19:57 -0500
commit6fe07aaffbf086a0ce9134ef27ce4a8921ff5947 (patch)
tree3df572890c012b0a23662141fc4e538a36b66b10 /drivers/scsi/esp_scsi.c
parent6d9d63b9480e1c7ea41845646de803c2d3f0eae2 (diff)
downloadop-kernel-dev-6fe07aaffbf086a0ce9134ef27ce4a8921ff5947.zip
op-kernel-dev-6fe07aaffbf086a0ce9134ef27ce4a8921ff5947.tar.gz
[SCSI] m68k: new mac_esp scsi driver
Replace the mac_esp driver with a new one based on the esp_scsi core. For esp_scsi: add support for sync transfers for the PIO mode, add a new esp_driver_ops method to get the maximum dma transfer size (like the old NCR53C9x driver), and some cleanups. Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Diffstat (limited to 'drivers/scsi/esp_scsi.c')
-rw-r--r--drivers/scsi/esp_scsi.c35
1 files changed, 24 insertions, 11 deletions
diff --git a/drivers/scsi/esp_scsi.c b/drivers/scsi/esp_scsi.c
index bfdee59..a0b6d41 100644
--- a/drivers/scsi/esp_scsi.c
+++ b/drivers/scsi/esp_scsi.c
@@ -978,7 +978,7 @@ static int esp_check_spur_intr(struct esp *esp)
*/
if (!esp->ops->dma_error(esp)) {
printk(KERN_ERR PFX "esp%d: Spurious irq, "
- "sreg=%x.\n",
+ "sreg=%02x.\n",
esp->host->unique_id, esp->sreg);
return -1;
}
@@ -1447,6 +1447,9 @@ static void esp_msgin_sdtr(struct esp *esp, struct esp_target_data *tp)
if (offset > 15)
goto do_reject;
+ if (esp->flags & ESP_FLAG_DISABLE_SYNC)
+ offset = 0;
+
if (offset) {
int rounded_up, one_clock;
@@ -1697,7 +1700,12 @@ again:
else
ent->flags &= ~ESP_CMD_FLAG_WRITE;
- dma_len = esp_dma_length_limit(esp, dma_addr, dma_len);
+ if (esp->ops->dma_length_limit)
+ dma_len = esp->ops->dma_length_limit(esp, dma_addr,
+ dma_len);
+ else
+ dma_len = esp_dma_length_limit(esp, dma_addr, dma_len);
+
esp->data_dma_len = dma_len;
if (!dma_len) {
@@ -1761,7 +1769,6 @@ again:
esp_advance_dma(esp, ent, cmd, bytes_sent);
esp_event(esp, ESP_EVENT_CHECK_PHASE);
goto again;
- break;
}
case ESP_EVENT_STATUS: {
@@ -2235,7 +2242,7 @@ static void esp_bootup_reset(struct esp *esp)
static void esp_set_clock_params(struct esp *esp)
{
- int fmhz;
+ int fhz;
u8 ccf;
/* This is getting messy but it has to be done correctly or else
@@ -2270,9 +2277,9 @@ static void esp_set_clock_params(struct esp *esp)
* This entails the smallest and largest sync period we could ever
* handle on this ESP.
*/
- fmhz = esp->cfreq;
+ fhz = esp->cfreq;
- ccf = ((fmhz / 1000000) + 4) / 5;
+ ccf = ((fhz / 1000000) + 4) / 5;
if (ccf == 1)
ccf = 2;
@@ -2281,16 +2288,16 @@ static void esp_set_clock_params(struct esp *esp)
* been unable to find the clock-frequency PROM property. All
* other machines provide useful values it seems.
*/
- if (fmhz <= 5000000 || ccf < 1 || ccf > 8) {
- fmhz = 20000000;
+ if (fhz <= 5000000 || ccf < 1 || ccf > 8) {
+ fhz = 20000000;
ccf = 4;
}
esp->cfact = (ccf == 8 ? 0 : ccf);
- esp->cfreq = fmhz;
- esp->ccycle = ESP_MHZ_TO_CYCLE(fmhz);
+ esp->cfreq = fhz;
+ esp->ccycle = ESP_HZ_TO_CYCLE(fhz);
esp->ctick = ESP_TICK(ccf, esp->ccycle);
- esp->neg_defp = ESP_NEG_DEFP(fmhz, ccf);
+ esp->neg_defp = ESP_NEG_DEFP(fhz, ccf);
esp->sync_defp = SYNC_DEFP_SLOW;
}
@@ -2382,6 +2389,12 @@ static int esp_slave_configure(struct scsi_device *dev)
struct esp_target_data *tp = &esp->target[dev->id];
int goal_tags, queue_depth;
+ if (esp->flags & ESP_FLAG_DISABLE_SYNC) {
+ /* Bypass async domain validation */
+ dev->ppr = 0;
+ dev->sdtr = 0;
+ }
+
goal_tags = 0;
if (dev->tagged_supported) {
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