[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>
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 @@
*/
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 @@
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 @@
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 @@
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_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 @@
* 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 @@
* 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 @@
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) {