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usb: host: dwc3: Add support for multiple PHYs

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DWC3 Ips can have more than 1 PHY for USB2 and 1 PHY for USB3, add support
for a generic number of PHYs and adapt the code to handle a generic
number of PHYs.

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
This commit is contained in:
Neil Armstrong 2018-04-11 17:08:01 +02:00 committed by Marek Vasut
parent ca7fdc8b12
commit 7c839ea70c
1 changed files with 66 additions and 47 deletions
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113
drivers/usb/host/xhci-dwc3.c
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@ -22,8 +22,8 @@
DECLARE_GLOBAL_DATA_PTR;
struct xhci_dwc3_platdata {
struct phy usb_phy;
struct phy usb3_phy;
struct phy *usb_phys;
int num_phys;
};
void dwc3_set_mode(struct dwc3 *dwc3_reg, u32 mode)
@ -113,45 +113,82 @@ void dwc3_set_fladj(struct dwc3 *dwc3_reg, u32 val)
}
#ifdef CONFIG_DM_USB
static int xhci_dwc3_setup_phy(struct udevice *dev, int index, struct phy *phy)
static int xhci_dwc3_setup_phy(struct udevice *dev, int count)
{
int ret = 0;
struct xhci_dwc3_platdata *plat = dev_get_platdata(dev);
int i, ret;
ret = generic_phy_get_by_index(dev, index, phy);
if (ret) {
if (ret != -ENOENT) {
pr_err("Failed to get USB PHY for %s\n", dev->name);
if (!count)
return 0;
plat->usb_phys = devm_kcalloc(dev, count, sizeof(struct phy),
GFP_KERNEL);
if (!plat->usb_phys)
return -ENOMEM;
for (i = 0; i < count; i++) {
ret = generic_phy_get_by_index(dev, i, &plat->usb_phys[i]);
if (ret && ret != -ENOENT) {
pr_err("Failed to get USB PHY%d for %s\n",
i, dev->name);
return ret;
}
} else {
ret = generic_phy_init(phy);
++plat->num_phys;
}
for (i = 0; i < plat->num_phys; i++) {
ret = generic_phy_init(&plat->usb_phys[i]);
if (ret) {
pr_err("Can't init USB PHY for %s\n", dev->name);
return ret;
pr_err("Can't init USB PHY%d for %s\n",
i, dev->name);
goto phys_init_err;
}
ret = generic_phy_power_on(phy);
}
for (i = 0; i < plat->num_phys; i++) {
ret = generic_phy_power_on(&plat->usb_phys[i]);
if (ret) {
pr_err("Can't power on USB PHY for %s\n", dev->name);
generic_phy_exit(phy);
return ret;
pr_err("Can't power USB PHY%d for %s\n",
i, dev->name);
goto phys_poweron_err;
}
}
return 0;
phys_poweron_err:
for (; i >= 0; i--)
generic_phy_power_off(&plat->usb_phys[i]);
for (i = 0; i < plat->num_phys; i++)
generic_phy_exit(&plat->usb_phys[i]);
return ret;
phys_init_err:
for (; i >= 0; i--)
generic_phy_exit(&plat->usb_phys[i]);
return ret;
}
static int xhci_dwc3_shutdown_phy(struct phy *phy)
static int xhci_dwc3_shutdown_phy(struct udevice *dev)
{
int ret = 0;
struct xhci_dwc3_platdata *plat = dev_get_platdata(dev);
int i, ret;
if (generic_phy_valid(phy)) {
ret = generic_phy_power_off(phy);
if (ret)
return ret;
for (i = 0; i < plat->num_phys; i++) {
if (!generic_phy_valid(&plat->usb_phys[i]))
continue;
ret = generic_phy_exit(phy);
if (ret)
return ret;
ret = generic_phy_power_off(&plat->usb_phys[i]);
ret |= generic_phy_exit(&plat->usb_phys[i]);
if (ret) {
pr_err("Can't shutdown USB PHY%d for %s\n",
i, dev->name);
}
}
return 0;
@ -159,7 +196,6 @@ static int xhci_dwc3_shutdown_phy(struct phy *phy)
static int xhci_dwc3_probe(struct udevice *dev)
{
struct xhci_dwc3_platdata *plat = dev_get_platdata(dev);
struct xhci_hcor *hcor;
struct xhci_hccr *hccr;
struct dwc3 *dwc3_reg;
@ -170,18 +206,10 @@ static int xhci_dwc3_probe(struct udevice *dev)
hcor = (struct xhci_hcor *)((uintptr_t)hccr +
HC_LENGTH(xhci_readl(&(hccr)->cr_capbase)));
ret = xhci_dwc3_setup_phy(dev, 0, &plat->usb_phy);
if (ret) {
pr_err("Failed to setup USB PHY for %s\n", dev->name);
ret = xhci_dwc3_setup_phy(dev, dev_count_phandle_with_args(
dev, "phys", "#phy-cells"));
if (ret)
return ret;
}
ret = xhci_dwc3_setup_phy(dev, 1, &plat->usb3_phy);
if (ret) {
pr_err("Failed to setup USB3 PHY for %s\n", dev->name);
xhci_dwc3_shutdown_phy(&plat->usb_phy);
return ret;
}
dwc3_reg = (struct dwc3 *)((char *)(hccr) + DWC3_REG_OFFSET);
@ -199,16 +227,7 @@ static int xhci_dwc3_probe(struct udevice *dev)
static int xhci_dwc3_remove(struct udevice *dev)
{
struct xhci_dwc3_platdata *plat = dev_get_platdata(dev);
int ret;
ret = xhci_dwc3_shutdown_phy(&plat->usb_phy);
if (ret)
pr_err("Can't shutdown USB PHY for %s\n", dev->name);
ret = xhci_dwc3_shutdown_phy(&plat->usb3_phy);
if (ret)
pr_err("Can't shutdown USB3 PHY for %s\n", dev->name);
xhci_dwc3_shutdown_phy(dev);
return xhci_deregister(dev);
}