This is an RFC on a simpler and less intrusive way of setting
up port flags on the mixed SATA/PATA Promise TX2plus chips.
The #promise-sata-pata branch requires libata core to be updated
with a per-port flags array in the ata_probe_ent structure. I
guess you don't approve of that solution.
This alternative patch is based on the observation that ap->flags
isn't really used until after ->port_start() has been invoked.
So this patch places the "exceptional" per-port flags array in
the driver's private host structure, and uses it in ->port_start()
to finalise the flags.
This patch also eliminates #promise-sata-pata's redundant code
formatting changes, and eliminates the redundant port_flags[]
assignments for the SATA-only TX4 chips.
Signed-off-by: Mikael Pettersson <mikpe@xxxxxxxx>
--- linux-2.6.20-rc4/drivers/ata/sata_promise.c.~1~ 2007-01-07 18:17:02.000000000 +0100
+++ linux-2.6.20-rc4/drivers/ata/sata_promise.c 2007-01-07 18:25:33.000000000 +0100
@@ -92,6 +92,7 @@ struct pdc_port_priv {
struct pdc_host_priv {
unsigned long flags;
+ unsigned long port_flags[ATA_MAX_PORTS];
};
static u32 pdc_sata_scr_read (struct ata_port *ap, unsigned int sc_reg);
@@ -183,7 +184,7 @@ static const struct ata_port_info pdc_po
/* board_2037x */
{
.sht = &pdc_ata_sht,
- .flags = PDC_COMMON_FLAGS | ATA_FLAG_SATA,
+ .flags = PDC_COMMON_FLAGS,
.pio_mask = 0x1f, /* pio0-4 */
.mwdma_mask = 0x07, /* mwdma0-2 */
.udma_mask = 0x7f, /* udma0-6 ; FIXME */
@@ -213,7 +214,7 @@ static const struct ata_port_info pdc_po
/* board_2057x */
{
.sht = &pdc_ata_sht,
- .flags = PDC_COMMON_FLAGS | ATA_FLAG_SATA,
+ .flags = PDC_COMMON_FLAGS,
.pio_mask = 0x1f, /* pio0-4 */
.mwdma_mask = 0x07, /* mwdma0-2 */
.udma_mask = 0x7f, /* udma0-6 ; FIXME */
@@ -271,6 +272,11 @@ static int pdc_port_start(struct ata_por
struct pdc_port_priv *pp;
int rc;
+ /* fix up port flags and cable type for heterogeneous chips like TX2plus */
+ ap->flags |= hp->port_flags[ap->port_no];
+ if (ap->flags & ATA_FLAG_SATA)
+ ap->cbl = ATA_CBL_SATA;
+
rc = ata_port_start(ap);
if (rc)
return rc;
@@ -377,7 +383,7 @@ static void pdc_pata_phy_reset(struct at
static u32 pdc_sata_scr_read (struct ata_port *ap, unsigned int sc_reg)
{
- if (sc_reg > SCR_CONTROL)
+ if ((sc_reg > SCR_CONTROL) || (ap->flags & ATA_FLAG_SLAVE_POSS))
return 0xffffffffU;
return readl((void __iomem *) ap->ioaddr.scr_addr + (sc_reg * 4));
}
@@ -386,7 +392,7 @@ static u32 pdc_sata_scr_read (struct ata
static void pdc_sata_scr_write (struct ata_port *ap, unsigned int sc_reg,
u32 val)
{
- if (sc_reg > SCR_CONTROL)
+ if ((sc_reg > SCR_CONTROL) || (ap->flags & ATA_FLAG_SLAVE_POSS))
return;
writel(val, (void __iomem *) ap->ioaddr.scr_addr + (sc_reg * 4));
}
@@ -740,6 +746,7 @@ static int pdc_ata_init_one (struct pci_
unsigned int board_idx = (unsigned int) ent->driver_data;
int pci_dev_busy = 0;
int rc;
+ u8 tmp;
if (!printed_version++)
dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
@@ -820,7 +827,17 @@ static int pdc_ata_init_one (struct pci_
hp->flags |= PDC_FLAG_GEN_II;
/* Fall through */
case board_2037x:
- probe_ent->n_ports = 2;
+ /* TX2plus boards also have a PATA port */
+ tmp = readb(mmio_base + PDC_FLASH_CTL+1);
+ if (!(tmp & 0x80)) {
+ probe_ent->n_ports = 3;
+ pdc_ata_setup_port(&probe_ent->port[2], base + 0x300);
+ hp->port_flags[2] = ATA_FLAG_SLAVE_POSS;
+ printk(KERN_INFO DRV_NAME " PATA port found\n");
+ } else
+ probe_ent->n_ports = 2;
+ hp->port_flags[0] = ATA_FLAG_SATA;
+ hp->port_flags[1] = ATA_FLAG_SATA;
break;
case board_20619:
probe_ent->n_ports = 4;
-
To unsubscribe from this list: send the line "unsubscribe linux-ide" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
