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usb: ulpi: Try more often to detect a phy 

Some boards need some more tries to successfully detect a phy. This
happens for example on the pcm038. Try up to four times to detect a
phy.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Sascha Hauer 2013-06-05 22:13:05 +02:00
parent 0339fe1d37
commit 310cb17470
1 changed files with 25 additions and 11 deletions
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36
drivers/usb/otg/ulpi.c
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@ -146,9 +146,9 @@ static struct ulpi_info ulpi_ids[] = {
ULPI_INFO(ULPI_ID(0x0424, 0x0006), "SMSC USB331x"),
};
int ulpi_probe(void __iomem *view)
static int ulpi_read_id(void __iomem *view, int *vid, int *pid)
{
int i, vid, pid, ret;
int i, ret;
uint32_t ulpi_id = 0;
for (i = 0; i < 4; i++) {
@ -157,20 +157,34 @@ int ulpi_probe(void __iomem *view)
return ret;
ulpi_id = (ulpi_id << 8) | ret;
}
vid = ulpi_id & 0xffff;
pid = ulpi_id >> 16;
for (i = 0; i < ARRAY_SIZE(ulpi_ids); i++) {
if (ulpi_ids[i].id == ULPI_ID(vid, pid)) {
pr_info("Found %s ULPI transceiver (0x%04x:0x%04x).\n",
ulpi_ids[i].name, vid, pid);
return 0;
*vid = ulpi_id & 0xffff;
*pid = (ulpi_id >> 16) & 0xffff;
return 0;
}
int ulpi_probe(void __iomem *view)
{
int i, j, vid, pid, ret;
for (i = 0; i < 4; i++) {
ret = ulpi_read_id(view, &vid, &pid);
if (ret)
return ret;
for (j = 0; j < ARRAY_SIZE(ulpi_ids); j++) {
if (ulpi_ids[j].id == ULPI_ID(vid, pid)) {
pr_info("Found %s ULPI transceiver (0x%04x:0x%04x).\n",
ulpi_ids[j].name, vid, pid);
return 0;
}
}
}
pr_err("No ULPI found.\n");
pr_err("No ULPI found. vid: 0x%04x pid: 0x%04x\n", vid, pid);
return -1;
return -ENODEV;
}
int ulpi_set_vbus(void __iomem *view, int on)