--- /dev/null
+/*
+ * Allwinner sun4i USB PHY driver
+ *
+ * Copyright (C) 2017 Jagan Teki <jagan@amarulasolutions.com>
+ * Copyright (C) 2015 Hans de Goede <hdegoede@redhat.com>
+ * Copyright (C) 2014 Roman Byshko <rbyshko@gmail.com>
+ *
+ * Modelled arch/arm/mach-sunxi/usb_phy.c to compatible with generic-phy.
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <dm/device.h>
+#include <generic-phy.h>
+#include <asm/gpio.h>
+#include <asm/io.h>
+#include <asm/arch/clock.h>
+#include <asm/arch/cpu.h>
+
+#define REG_ISCR 0x00
+#define REG_PHYCTL_A10 0x04
+#define REG_PHYBIST 0x08
+#define REG_PHYTUNE 0x0c
+#define REG_PHYCTL_A33 0x10
+#define REG_PHY_OTGCTL 0x20
+#define REG_PMU_UNK1 0x10
+
+/* Common Control Bits for Both PHYs */
+#define PHY_PLL_BW 0x03
+#define PHY_RES45_CAL_EN 0x0c
+
+/* Private Control Bits for Each PHY */
+#define PHY_TX_AMPLITUDE_TUNE 0x20
+#define PHY_TX_SLEWRATE_TUNE 0x22
+#define PHY_DISCON_TH_SEL 0x2a
+
+#define PHYCTL_DATA BIT(7)
+#define OTGCTL_ROUTE_MUSB BIT(0)
+
+#define PHY_TX_RATE BIT(4)
+#define PHY_TX_MAGNITUDE BIT(2)
+#define PHY_TX_AMPLITUDE_LEN 5
+
+#define PHY_RES45_CAL_DATA BIT(0)
+#define PHY_RES45_CAL_LEN 1
+#define PHY_DISCON_TH_LEN 2
+
+#define SUNXI_AHB_ICHR8_EN BIT(10)
+#define SUNXI_AHB_INCR4_BURST_EN BIT(9)
+#define SUNXI_AHB_INCRX_ALIGN_EN BIT(8)
+#define SUNXI_ULPI_BYPASS_EN BIT(0)
+
+#define MAX_PHYS 4
+
+enum sun4i_usb_phy_type {
+ sun50i_a64_phy,
+};
+
+struct sun4i_usb_phy_cfg {
+ int num_phys;
+ enum sun4i_usb_phy_type type;
+ u32 disc_thresh;
+ u8 phyctl_offset;
+ bool enable_pmu_unk1;
+ bool phy0_dual_route;
+};
+
+struct sun4i_usb_phy_info {
+ const char *gpio_vbus;
+ const char *gpio_vbus_det;
+ const char *gpio_id_det;
+ int rst_mask;
+} phy_info[] = {
+ {
+ .gpio_vbus = CONFIG_USB0_VBUS_PIN,
+ .gpio_vbus_det = CONFIG_USB0_VBUS_DET,
+ .gpio_id_det = CONFIG_USB0_ID_DET,
+ .rst_mask = (CCM_USB_CTRL_PHY0_RST | CCM_USB_CTRL_PHY0_CLK),
+ },
+ {
+ .gpio_vbus = CONFIG_USB1_VBUS_PIN,
+ .gpio_vbus_det = NULL,
+ .gpio_id_det = NULL,
+ .rst_mask = (CCM_USB_CTRL_PHY1_RST | CCM_USB_CTRL_PHY1_CLK),
+ },
+ {
+ .gpio_vbus = CONFIG_USB2_VBUS_PIN,
+ .gpio_vbus_det = NULL,
+ .gpio_id_det = NULL,
+ .rst_mask = (CCM_USB_CTRL_PHY2_RST | CCM_USB_CTRL_PHY2_CLK),
+ },
+ {
+ .gpio_vbus = CONFIG_USB3_VBUS_PIN,
+ .gpio_vbus_det = NULL,
+ .gpio_id_det = NULL,
+ .rst_mask = (CCM_USB_CTRL_PHY3_RST | CCM_USB_CTRL_PHY3_CLK),
+ },
+};
+
+struct sun4i_usb_phy_plat {
+ void __iomem *pmu;
+ int power_on_count;
+ int gpio_vbus;
+ int gpio_vbus_det;
+ int gpio_id_det;
+ int rst_mask;
+ int id;
+};
+
+struct sun4i_usb_phy_data {
+ void __iomem *base;
+ struct sunxi_ccm_reg *ccm;
+ const struct sun4i_usb_phy_cfg *cfg;
+ struct sun4i_usb_phy_plat *usb_phy;
+};
+
+static int initial_usb_scan_delay = CONFIG_INITIAL_USB_SCAN_DELAY;
+
+static void sun4i_usb_phy_write(struct phy *phy, u32 addr, u32 data, int len)
+{
+ struct sun4i_usb_phy_data *phy_data = dev_get_priv(phy->dev);
+ struct sun4i_usb_phy_plat *usb_phy = &phy_data->usb_phy[phy->id];
+ u32 temp, usbc_bit = BIT(usb_phy->id * 2);
+ void __iomem *phyctl = phy_data->base + phy_data->cfg->phyctl_offset;
+ int i;
+
+ if (phy_data->cfg->phyctl_offset == REG_PHYCTL_A33) {
+ /* SoCs newer than A33 need us to set phyctl to 0 explicitly */
+ writel(0, phyctl);
+ }
+
+ for (i = 0; i < len; i++) {
+ temp = readl(phyctl);
+
+ /* clear the address portion */
+ temp &= ~(0xff << 8);
+
+ /* set the address */
+ temp |= ((addr + i) << 8);
+ writel(temp, phyctl);
+
+ /* set the data bit and clear usbc bit*/
+ temp = readb(phyctl);
+ if (data & 0x1)
+ temp |= PHYCTL_DATA;
+ else
+ temp &= ~PHYCTL_DATA;
+ temp &= ~usbc_bit;
+ writeb(temp, phyctl);
+
+ /* pulse usbc_bit */
+ temp = readb(phyctl);
+ temp |= usbc_bit;
+ writeb(temp, phyctl);
+
+ temp = readb(phyctl);
+ temp &= ~usbc_bit;
+ writeb(temp, phyctl);
+
+ data >>= 1;
+ }
+}
+
+static void sun4i_usb_phy_passby(struct sun4i_usb_phy_plat *usb_phy,
+ bool enable)
+{
+ u32 bits, reg_value;
+
+ if (!usb_phy->pmu)
+ return;
+
+ bits = SUNXI_AHB_ICHR8_EN | SUNXI_AHB_INCR4_BURST_EN |
+ SUNXI_AHB_INCRX_ALIGN_EN | SUNXI_ULPI_BYPASS_EN;
+ reg_value = readl(usb_phy->pmu);
+
+ if (enable)
+ reg_value |= bits;
+ else
+ reg_value &= ~bits;
+
+ writel(reg_value, usb_phy->pmu);
+}
+
+static int sun4i_usb_phy_power_on(struct phy *phy)
+{
+ struct sun4i_usb_phy_data *data = dev_get_priv(phy->dev);
+ struct sun4i_usb_phy_plat *usb_phy = &data->usb_phy[phy->id];
+
+ if (initial_usb_scan_delay) {
+ mdelay(initial_usb_scan_delay);
+ initial_usb_scan_delay = 0;
+ }
+
+ usb_phy->power_on_count++;
+ if (usb_phy->power_on_count != 1)
+ return 0;
+
+ if (usb_phy->gpio_vbus >= 0)
+ gpio_set_value(usb_phy->gpio_vbus, SUNXI_GPIO_PULL_UP);
+
+ return 0;
+}
+
+static int sun4i_usb_phy_power_off(struct phy *phy)
+{
+ struct sun4i_usb_phy_data *data = dev_get_priv(phy->dev);
+ struct sun4i_usb_phy_plat *usb_phy = &data->usb_phy[phy->id];
+
+ usb_phy->power_on_count--;
+ if (usb_phy->power_on_count != 0)
+ return 0;
+
+ if (usb_phy->gpio_vbus >= 0)
+ gpio_set_value(usb_phy->gpio_vbus, SUNXI_GPIO_PULL_DISABLE);
+
+ return 0;
+}
+
+static void sun4i_usb_phy0_reroute(struct sun4i_usb_phy_data *data, bool id_det)
+{
+ u32 regval;
+
+ regval = readl(data->base + REG_PHY_OTGCTL);
+ if (!id_det) {
+ /* Host mode. Route phy0 to EHCI/OHCI */
+ regval &= ~OTGCTL_ROUTE_MUSB;
+ } else {
+ /* Peripheral mode. Route phy0 to MUSB */
+ regval |= OTGCTL_ROUTE_MUSB;
+ }
+ writel(regval, data->base + REG_PHY_OTGCTL);
+}
+
+static int sun4i_usb_phy_init(struct phy *phy)
+{
+ struct sun4i_usb_phy_data *data = dev_get_priv(phy->dev);
+ struct sun4i_usb_phy_plat *usb_phy = &data->usb_phy[phy->id];
+ u32 val;
+
+ setbits_le32(&data->ccm->usb_clk_cfg, usb_phy->rst_mask);
+
+ if (usb_phy->pmu && data->cfg->enable_pmu_unk1) {
+ val = readl(usb_phy->pmu + REG_PMU_UNK1);
+ writel(val & ~2, usb_phy->pmu + REG_PMU_UNK1);
+ }
+
+ if (usb_phy->id == 0)
+ sun4i_usb_phy_write(phy, PHY_RES45_CAL_EN, PHY_RES45_CAL_DATA,
+ PHY_RES45_CAL_LEN);
+
+ /* Adjust PHY's magnitude and rate */
+ sun4i_usb_phy_write(phy, PHY_TX_AMPLITUDE_TUNE, PHY_TX_MAGNITUDE |
+ PHY_TX_RATE, PHY_TX_AMPLITUDE_LEN);
+
+ /* Disconnect threshold adjustment */
+ sun4i_usb_phy_write(phy, PHY_DISCON_TH_SEL, data->cfg->disc_thresh,
+ PHY_DISCON_TH_LEN);
+
+ if (usb_phy->id != 0)
+ sun4i_usb_phy_passby(usb_phy, true);
+
+ sun4i_usb_phy0_reroute(data, true);
+
+ return 0;
+}
+
+static int sun4i_usb_phy_exit(struct phy *phy)
+{
+ struct sun4i_usb_phy_data *data = dev_get_priv(phy->dev);
+ struct sun4i_usb_phy_plat *usb_phy = &data->usb_phy[phy->id];
+
+ sun4i_usb_phy_passby(usb_phy, false);
+
+ clrbits_le32(&data->ccm->usb_clk_cfg, usb_phy->rst_mask);
+
+ return 0;
+}
+
+static int sun4i_usb_phy_xlate(struct phy *phy,
+ struct ofnode_phandle_args *args)
+{
+ struct sun4i_usb_phy_data *data = dev_get_priv(phy->dev);
+
+ if (args->args_count >= data->cfg->num_phys)
+ return -EINVAL;
+
+ if (args->args_count)
+ phy->id = args->args[0];
+ else
+ phy->id = 0;
+
+ debug("%s: phy_id = %ld\n", __func__, phy->id);
+ return 0;
+}
+
+static struct phy_ops sun4i_usb_phy_ops = {
+ .of_xlate = sun4i_usb_phy_xlate,
+ .init = sun4i_usb_phy_init,
+ .power_on = sun4i_usb_phy_power_on,
+ .power_off = sun4i_usb_phy_power_off,
+ .exit = sun4i_usb_phy_exit,
+};
+
+static int sun4i_usb_phy_probe(struct udevice *dev)
+{
+ struct sun4i_usb_phy_plat *plat = dev_get_platdata(dev);
+ struct sun4i_usb_phy_data *data = dev_get_priv(dev);
+ int i, ret;
+
+ data->cfg = (const struct sun4i_usb_phy_cfg *)dev_get_driver_data(dev);
+ if (!data->cfg)
+ return -EINVAL;
+
+ data->base = (void __iomem *)devfdt_get_addr_name(dev, "phy_ctrl");
+ if (IS_ERR(data->base))
+ return PTR_ERR(data->base);
+
+ data->ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
+ if (IS_ERR(data->ccm))
+ return PTR_ERR(data->ccm);
+
+ data->usb_phy = plat;
+ for (i = 0; i < data->cfg->num_phys; i++) {
+ struct sun4i_usb_phy_plat *phy = &plat[i];
+ struct sun4i_usb_phy_info *info = &phy_info[i];
+ char name[16];
+
+ phy->gpio_vbus = sunxi_name_to_gpio(info->gpio_vbus);
+ if (phy->gpio_vbus >= 0) {
+ ret = gpio_request(phy->gpio_vbus, "usb_vbus");
+ if (ret)
+ return ret;
+ ret = gpio_direction_output(phy->gpio_vbus, 0);
+ if (ret)
+ return ret;
+ }
+
+ phy->gpio_vbus_det = sunxi_name_to_gpio(info->gpio_vbus_det);
+ if (phy->gpio_vbus_det >= 0) {
+ ret = gpio_request(phy->gpio_vbus_det, "usb_vbus_det");
+ if (ret)
+ return ret;
+ ret = gpio_direction_input(phy->gpio_vbus_det);
+ if (ret)
+ return ret;
+ }
+
+ phy->gpio_id_det = sunxi_name_to_gpio(info->gpio_id_det);
+ if (phy->gpio_id_det >= 0) {
+ ret = gpio_request(phy->gpio_id_det, "usb_id_det");
+ if (ret)
+ return ret;
+ ret = gpio_direction_input(phy->gpio_id_det);
+ if (ret)
+ return ret;
+ sunxi_gpio_set_pull(phy->gpio_id_det, SUNXI_GPIO_PULL_UP);
+ }
+
+ if (i || data->cfg->phy0_dual_route) {
+ snprintf(name, sizeof(name), "pmu%d", i);
+ phy->pmu = (void __iomem *)devfdt_get_addr_name(dev, name);
+ if (IS_ERR(phy->pmu))
+ return PTR_ERR(phy->pmu);
+ }
+
+ phy->id = i;
+ phy->rst_mask = info->rst_mask;
+ };
+
+ setbits_le32(&data->ccm->usb_clk_cfg, CCM_USB_CTRL_PHYGATE);
+
+ debug("Allwinner Sun4I USB PHY driver loaded\n");
+ return 0;
+}
+
+static const struct sun4i_usb_phy_cfg sun50i_a64_cfg = {
+ .num_phys = 2,
+ .type = sun50i_a64_phy,
+ .disc_thresh = 3,
+ .phyctl_offset = REG_PHYCTL_A33,
+ .enable_pmu_unk1 = true,
+ .phy0_dual_route = true,
+};
+
+static const struct udevice_id sun4i_usb_phy_ids[] = {
+ { .compatible = "allwinner,sun50i-a64-usb-phy", .data = (ulong)&sun50i_a64_cfg},
+ { }
+};
+
+U_BOOT_DRIVER(sun4i_usb_phy) = {
+ .name = "sun4i_usb_phy",
+ .id = UCLASS_PHY,
+ .of_match = sun4i_usb_phy_ids,
+ .ops = &sun4i_usb_phy_ops,
+ .probe = sun4i_usb_phy_probe,
+ .platdata_auto_alloc_size = sizeof(struct sun4i_usb_phy_plat[MAX_PHYS]),
+ .priv_auto_alloc_size = sizeof(struct sun4i_usb_phy_data),
+};
projects / oweals / u-boot.git / commitdiff