From 6fe07aaffbf086a0ce9134ef27ce4a8921ff5947 Mon Sep 17 00:00:00 2001 From: Finn Thain Date: Fri, 25 Apr 2008 10:06:05 -0500 Subject: [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 Acked-by: David S. Miller Signed-off-by: Geert Uytterhoeven Signed-off-by: James Bottomley --- drivers/scsi/esp_scsi.c | 35 ++++++++++++++++++++++++----------- 1 file changed, 24 insertions(+), 11 deletions(-) (limited to 'drivers/scsi/esp_scsi.c') diff --git a/drivers/scsi/esp_scsi.c b/drivers/scsi/esp_scsi.c index bfdee596889..a0b6d414953 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) { -- cgit v1.2.3