phy: Add support for phy-da8xx-usb
In preparation for supporting the musb driver, this patch
adds support for the usb phy associated with the musb driver.
Signed-off-by: Adam Ford <aford173@gmail.com>
diff --git a/drivers/phy/phy-da8xx-usb.c b/drivers/phy/phy-da8xx-usb.c
new file mode 100644
index 0000000..034b479
--- /dev/null
+++ b/drivers/phy/phy-da8xx-usb.c
@@ -0,0 +1,64 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Based on the DA8xx "glue layer" code.
+ * Copyright (c) 2008-2019, MontaVista Software, Inc. <source@mvista.com>
+ *
+ * DT support added by: Adam Ford <aford173@gmail.com>
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <dm/device-internal.h>
+#include <dm/lists.h>
+#include <asm/arch/hardware.h>
+#include <asm/arch/da8xx-usb.h>
+#include <asm/io.h>
+#include <generic-phy.h>
+
+static int da8xx_usb_phy_power_on(struct phy *phy)
+{
+ unsigned long timeout;
+
+ clrsetbits_le32(&davinci_syscfg_regs->cfgchip2,
+ CFGCHIP2_RESET | CFGCHIP2_PHYPWRDN | CFGCHIP2_OTGPWRDN |
+ CFGCHIP2_OTGMODE | CFGCHIP2_REFFREQ,
+ CFGCHIP2_SESENDEN | CFGCHIP2_VBDTCTEN |
+ CFGCHIP2_PHY_PLLON | CFGCHIP2_REFFREQ_24MHZ);
+
+ /* wait until the usb phy pll locks */
+ timeout = get_timer(0);
+ while (get_timer(timeout) < 10) {
+ if (readl(&davinci_syscfg_regs->cfgchip2) & CFGCHIP2_PHYCLKGD)
+ return 0;
+ }
+
+ debug("Phy was not turned on\n");
+
+ return -ENODEV;
+}
+
+static int da8xx_usb_phy_power_off(struct phy *phy)
+{
+ clrsetbits_le32(&davinci_syscfg_regs->cfgchip2,
+ CFGCHIP2_PHY_PLLON,
+ CFGCHIP2_PHYPWRDN | CFGCHIP2_OTGPWRDN);
+
+ return 0;
+}
+
+static const struct udevice_id da8xx_phy_ids[] = {
+ { .compatible = "ti,da830-usb-phy" },
+ { }
+};
+
+static struct phy_ops da8xx_phy_ops = {
+ .power_on = da8xx_usb_phy_power_on,
+ .power_off = da8xx_usb_phy_power_off,
+};
+
+U_BOOT_DRIVER(da8xx_phy) = {
+ .name = "da8xx-usb-phy",
+ .id = UCLASS_PHY,
+ .of_match = da8xx_phy_ids,
+ .ops = &da8xx_phy_ops,
+};