[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>

1 files changed, 8 insertions, 1 deletions

diff --git a/drivers/scsi/esp_scsi.h b/drivers/scsi/esp_scsi.h
index 9367a88d3974..bb43a1388188 100644
--- a/drivers/scsi/esp_scsi.h
+++ b/drivers/scsi/esp_scsi.h
@@ -224,7 +224,7 @@
 #define ESP_TIMEO_CONST       8192
 #define ESP_NEG_DEFP(mhz, cfact) \
         ((ESP_BUS_TIMEOUT * ((mhz) / 1000)) / (8192 * (cfact)))
-#define ESP_MHZ_TO_CYCLE(mhertz)  ((1000000000) / ((mhertz) / 1000))
+#define ESP_HZ_TO_CYCLE(hertz)  ((1000000000) / ((hertz) / 1000))
 #define ESP_TICK(ccf, cycle)  ((7682 * (ccf) * (cycle) / 1000))
 
 /* For slow to medium speed input clock rates we shoot for 5mb/s, but for high
@@ -368,6 +368,12 @@ struct esp_driver_ops {
          */
         int (*irq_pending)(struct esp *esp);
 
+        /* Return the maximum allowable size of a DMA transfer for a
+         * given buffer.
+         */
+        u32 (*dma_length_limit)(struct esp *esp, u32 dma_addr,
+                                u32 dma_len);
+
         /* Reset the DMA engine entirely.  On return, ESP interrupts
          * should be enabled.  Often the interrupt enabling is
          * controlled in the DMA engine.
@@ -471,6 +477,7 @@ struct esp {
 #define ESP_FLAG_DOING_SLOWCMD  0x00000004
 #define ESP_FLAG_WIDE_CAPABLE   0x00000008
 #define ESP_FLAG_QUICKIRQ_CHECK 0x00000010
+#define ESP_FLAG_DISABLE_SYNC   0x00000020
 
         u8                      select_state;
 #define ESP_SELECT_NONE         0x00 /* Not selecting */