[PATCH 15/19] usb: ehci-mx6: Use portnr in DM only if PHY is disabled

[Marek Vasut <marex@denx.de>]

In case of legacy platforms which do not implement PHY support,
determine portnr from PHY node DT aliases, just like Linux does.
This is not necessary in case PHY support is enabled and a PHY
driver is available, so only enable the portnr handling for the
legacy platforms.

Fixes: 4de51cc25b5 ("usb: ehci-mx6: Drop assignment of sequence number")
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: Peng Fan <peng.fan@nxp.com>
Cc: Stefano Babic <sbabic@denx.de>
Cc: Ye Li <ye.li@nxp.com>
Cc: uboot-imx <uboot-imx@nxp.com>
---
 drivers/usb/host/ehci-mx6.c | 54 ++++++-------------------------------
 1 file changed, 8 insertions(+), 46 deletions(-)

diff --git a/drivers/usb/host/ehci-mx6.c b/drivers/usb/host/ehci-mx6.c
index 345be528739..b1cc62fcc37 100644
--- a/drivers/usb/host/ehci-mx6.c
+++ b/drivers/usb/host/ehci-mx6.c
@@ -414,12 +414,12 @@ struct ehci_mx6_priv_data {
 	struct udevice *vbus_supply;
 	struct clk clk;
 	enum usb_init_type init_type;
-	int portnr;
 #if !defined(CONFIG_PHY)
 	/* Legacy iMX6/iMX7/iMX7ULP compat, they do not use PHY framework yet */
 	void __iomem *phy_addr;
 	void __iomem *misc_addr;
 	void __iomem *anatop_addr;
+	int portnr;
 #endif
 };
 
@@ -541,49 +541,6 @@ static int ehci_usb_of_to_plat(struct udevice *dev)
 	return 0;
 }
 
-static int ehci_usb_bind(struct udevice *dev)
-{
-	/*
-	 * TODO:
-	 * This driver is only partly converted to DT probing and still uses
-	 * a tremendous amount of hard-coded addresses. To make things worse,
-	 * the driver depends on specific sequential indexing of controllers,
-	 * from which it derives offsets in the PHY and ANATOP register sets.
-	 *
-	 * Here we attempt to calculate these indexes from DT information as
-	 * well as we can. The USB controllers on all existing iMX6 SoCs
-	 * are placed next to each other, at addresses incremented by 0x200,
-	 * and iMX7 their addresses are shifted by 0x10000.
-	 * Thus, the index is derived from the multiple of 0x200 (0x10000 for
-	 * iMX7) offset from the first controller address.
-	 *
-	 * However, to complete conversion of this driver to DT probing, the
-	 * following has to be done:
-	 * - DM clock framework support for iMX must be implemented
-	 * - usb_power_config() has to be converted to clock framework
-	 *   -> Thus, the ad-hoc "index" variable goes away.
-	 * - USB PHY handling has to be factored out into separate driver
-	 *   -> Thus, the ad-hoc "index" variable goes away from the PHY
-	 *      code, the PHY driver must parse it's address from DT. This
-	 *      USB driver must find the PHY driver via DT phandle.
-	 *   -> usb_power_config() shall be moved to PHY driver
-	 * With these changes in place, the ad-hoc indexing goes away and
-	 * the driver is fully converted to DT probing.
-	 */
-
-	/*
-	 * FIXME: This cannot work with the new sequence numbers.
-	 * Please complete the DM conversion.
-	 *
-	 * u32 controller_spacing = is_mx7() ? 0x10000 : 0x200;
-	 * fdt_addr_t addr = devfdt_get_addr_index(dev, 0);
-	 *
-	 * dev->req_seq = (addr - USB_BASE_ADDR) / controller_spacing;
-	 */
-
-	return 0;
-}
-
 static int mx6_parse_dt_addrs(struct udevice *dev)
 {
 #if !defined(CONFIG_PHY)
@@ -596,11 +553,17 @@ static int mx6_parse_dt_addrs(struct udevice *dev)
 	const void *blob = gd->fdt_blob;
 	int offset = dev_of_offset(dev);
 	void *__iomem addr;
+	int ret, devnump;
 
 	phy_off = fdtdec_lookup_phandle(blob, offset, "fsl,usbphy");
 	if (phy_off < 0)
 		return -EINVAL;
 
+	ret = fdtdec_get_alias_seq(blob, dev->uclass->uc_drv->name,
+				   phy_off, &devnump);
+	if (ret < 0)
+		return ret;
+
 	misc_off = fdtdec_lookup_phandle(blob, offset, "fsl,usbmisc");
 	if (misc_off < 0)
 		return -EINVAL;
@@ -610,6 +573,7 @@ static int mx6_parse_dt_addrs(struct udevice *dev)
 		return -EINVAL;
 
 	priv->phy_addr = addr;
+	priv->portnr = devnump;
 
 	addr = (void __iomem *)fdtdec_get_addr(blob, misc_off, "reg");
 	if ((fdt_addr_t)addr == FDT_ADDR_T_NONE)
@@ -656,7 +620,6 @@ static int ehci_usb_probe(struct udevice *dev)
 		return ret;
 
 	priv->ehci = ehci;
-	priv->portnr = dev_seq(dev);
 	priv->init_type = type;
 
 #if CONFIG_IS_ENABLED(CLK)
@@ -766,7 +729,6 @@ U_BOOT_DRIVER(usb_mx6) = {
 	.id	= UCLASS_USB,
 	.of_match = mx6_usb_ids,
 	.of_to_plat = ehci_usb_of_to_plat,
-	.bind	= ehci_usb_bind,
 	.probe	= ehci_usb_probe,
 	.remove = ehci_usb_remove,
 	.ops	= &ehci_usb_ops,
-- 
2.30.2