sata_promise: alternative PATA support on pdc2037x without libata interface changes

Add support for detecting the cable bit for PATA ports in the sata_promise driver.

---
Notes:
* Use together with alternative PATA support patch. (2/2)
* Based on current libata development branch and PATA support patch by Erik Benada from early 2005 (?)

phil

@@ -96,6 +96,7 @@ static void pdc_tf_load_mmio(struct ata_
 static void pdc_exec_command_mmio(struct ata_port *ap, const struct

ata_taskfile *tf);
static void pdc_irq_clear(struct ata_port *ap); static int pdc_qc_issue_prot(struct ata_queued_cmd *qc);
+static void pdc_pata_cbl_detect(struct ata_port *ap);

static struct scsi_host_template pdc_ata_sht = {
@@ -326,11 +339,25 @@ static void pdc_sata_phy_reset(struct at
sata_phy_reset(ap);
}

+static void pdc_pata_cbl_detect(struct ata_port *ap) +{
+ u8 tmp;
+ void *mmio = (void *) ap->ioaddr.cmd_addr + PDC_CTLSTAT + 0x03;
+
+ tmp = readb(mmio);
+
+ if (tmp & 0x01) {
+ ap->cbl = ATA_CBL_PATA40;
+ ap->udma_mask &= ATA_UDMA_MASK_40C;
+ } else {
+ ap->cbl = ATA_CBL_PATA80;
+ }
+}
+
static void pdc_pata_phy_reset(struct ata_port *ap) {
- /* FIXME: add cable detect. Don't assume 40-pin cable */
- ap->cbl = ATA_CBL_PATA40;
- ap->udma_mask &= ATA_UDMA_MASK_40C;
+ /* FIX: added cable detect. Don't assume 40-pin cable */
+ pdc_pata_cbl_detect(ap);

pdc_reset_port(ap);
ata_port_probe(ap);