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drivers: usb: fsl: Add USB device-tree errata framework

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Add a new framework for fsl usb erratum handling to standardize
erratum checking only inside Uboot. Information to kernel is passed
via a boolean property corresponding to erratum, hence eliminating
need for code duplication inside kernel

Signed-off-by: Ramneek Mehresh <ramneek.mehresh@freescale.com>
Signed-off-by: Nikhil Badola <nikhil.badola@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>
This commit is contained in:
Nikhil Badola 2014-09-30 11:24:07 +05:30 committed by York Sun
parent a1c04e2785
commit ecfc19f31f
1 changed files with 64 additions and 0 deletions
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64
drivers/usb/host/ehci-fsl.c
View file

@ -211,10 +211,57 @@ static int fdt_fixup_usb_mode_phy_type(void *blob, const char *mode,
return node_offset;
}
static const char *fdt_usb_get_node_type(void *blob, int start_offset,
int *node_offset)
{
const char *compat_dr = "fsl-usb2-dr";
const char *compat_mph = "fsl-usb2-mph";
const char *node_type = NULL;
*node_offset = fdt_node_offset_by_compatible(blob, start_offset,
compat_mph);
if (*node_offset < 0) {
*node_offset = fdt_node_offset_by_compatible(blob,
start_offset,
compat_dr);
if (*node_offset < 0) {
printf("ERROR: could not find compatible node: %s\n",
fdt_strerror(*node_offset));
} else {
node_type = compat_dr;
}
} else {
node_type = compat_mph;
}
return node_type;
}
static int fdt_fixup_usb_erratum(void *blob, const char *prop_erratum,
int start_offset)
{
int node_offset, err;
const char *node_type = NULL;
node_type = fdt_usb_get_node_type(blob, start_offset, &node_offset);
if (!node_type)
return -1;
err = fdt_setprop(blob, node_offset, prop_erratum, NULL, 0);
if (err < 0) {
printf("ERROR: could not set %s for %s: %s.\n",
prop_erratum, node_type, fdt_strerror(err));
}
return node_offset;
}
void fdt_fixup_dr_usb(void *blob, bd_t *bd)
{
static const char * const modes[] = { "host", "peripheral", "otg" };
static const char * const phys[] = { "ulpi", "utmi" };
int usb_erratum_a006261_off = -1;
int usb_erratum_a007075_off = -1;
int usb_mode_off = -1;
int usb_phy_off = -1;
char str[5];
@ -268,6 +315,23 @@ void fdt_fixup_dr_usb(void *blob, bd_t *bd)
if (usb_phy_off < 0)
return;
if (has_erratum_a006261()) {
usb_erratum_a006261_off = fdt_fixup_usb_erratum
(blob,
"fsl,usb-erratum-a006261",
usb_erratum_a006261_off);
if (usb_erratum_a006261_off < 0)
return;
}
if (has_erratum_a007075()) {
usb_erratum_a007075_off = fdt_fixup_usb_erratum
(blob,
"fsl,usb-erratum-a007075",
usb_erratum_a007075_off);
if (usb_erratum_a007075_off < 0)
return;
}
}
}
#endif