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ahci: Support spin-up and link-up separately

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Add HDD handling to the SSD-only AHCI driver, by separately dealing with
spin-up and link-up.

Signed-off-by: Marc Jones <marc.jones@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Marc Jones 2012-10-29 05:24:01 +00:00 • committed by Tom Rini
parent 57847660bb
commit 2a0c61d401
1 changed files with 38 additions and 5 deletions

43
drivers/block/ahci.c
View file

@ -53,6 +53,7 @@ hd_driveid_t *ataid[AHCI_MAX_PORTS];
#endif
/* Maximum timeouts for each event */
#define WAIT_MS_SPINUP 10000
#define WAIT_MS_DATAIO 5000
#define WAIT_MS_LINKUP 4
@ -129,7 +130,7 @@ static int ahci_host_init(struct ahci_probe_ent *probe_ent)
unsigned short vendor;
#endif
volatile u8 *mmio = (volatile u8 *)probe_ent->mmio_base;
u32 tmp, cap_save;
u32 tmp, cap_save, cmd;
int i, j;
volatile u8 *port_mmio;
@ -137,7 +138,7 @@ static int ahci_host_init(struct ahci_probe_ent *probe_ent)
cap_save = readl(mmio + HOST_CAP);
cap_save &= ((1 << 28) | (1 << 17));
cap_save |= (1 << 27);
cap_save |= (1 << 27); /* Staggered Spin-up. Not needed. */
/* global controller reset */
tmp = readl(mmio + HOST_CTL);
@ -201,9 +202,18 @@ static int ahci_host_init(struct ahci_probe_ent *probe_ent)
msleep(500);
}
debug("Spinning up port %d... ", i);
writel(PORT_CMD_SPIN_UP, port_mmio + PORT_CMD);
/* Add the spinup command to whatever mode bits may
* already be on in the command register.
*/
cmd = readl(port_mmio + PORT_CMD);
cmd |= PORT_CMD_FIS_RX;
cmd |= PORT_CMD_SPIN_UP;
writel_with_flush(cmd, port_mmio + PORT_CMD);
/* Bring up SATA link.
* SATA link bringup time is usually less than 1 ms; only very
* rarely has it taken between 1-2 ms. Never seen it above 2 ms.
*/
j = 0;
while (j < WAIT_MS_LINKUP) {
tmp = readl(port_mmio + PORT_SCR_STAT);
@ -212,7 +222,30 @@ static int ahci_host_init(struct ahci_probe_ent *probe_ent)
udelay(1000);
j++;
}
if (j == WAIT_MS_LINKUP)
if (j == WAIT_MS_LINKUP) {
printf("SATA link %d timeout.\n", i);
continue;
} else {
debug("SATA link ok.\n");
}
/* Clear error status */
tmp = readl(port_mmio + PORT_SCR_ERR);
if (tmp)
writel(tmp, port_mmio + PORT_SCR_ERR);
debug("Spinning up device on SATA port %d... ", i);
j = 0;
while (j < WAIT_MS_SPINUP) {
tmp = readl(port_mmio + PORT_TFDATA);
if (!(tmp & (ATA_STAT_BUSY | ATA_STAT_DRQ)))
break;
udelay(1000);
j++;
}
printf("Target spinup took %d ms.\n", j);
if (j == WAIT_MS_SPINUP)
debug("timeout.\n");
else
debug("ok.\n");