[U-Boot] [PATCH v4 09/34] phy: Add Allwinner A64 USB PHY driver
Jagan Teki
jagannadh.teki at gmail.com
Tue Feb 6 14:25:39 UTC 2018
USB PHY implementation for Allwinner SOC's can be handling
in to single driver with different phy configs.
This driver handle all Allwinner USB PHY's start from 4I to
50I(except 9I). Currently added A64 compatibility more will
add in next coming patches.
Current implementation is unable to get pinctrl, clock and reset
details from DT since the dm code on these will add it future.
Driver named as phy-sun4i-usb.c since the same PHY logic
work for all Allwinner SOC's start from 4I to A64 except 9I
with different phy configurations.
Signed-off-by: Jagan Teki <jagan at amarulasolutions.com>
---
drivers/Kconfig | 2 +
drivers/Makefile | 1 +
drivers/phy/allwinner/Kconfig | 13 ++
drivers/phy/allwinner/Makefile | 6 +
drivers/phy/allwinner/phy-sun4i-usb.c | 400 ++++++++++++++++++++++++++++++++++
5 files changed, 422 insertions(+)
create mode 100644 drivers/phy/allwinner/Kconfig
create mode 100644 drivers/phy/allwinner/Makefile
create mode 100644 drivers/phy/allwinner/phy-sun4i-usb.c
diff --git a/drivers/Kconfig b/drivers/Kconfig
index c2e813f..9af8835 100644
--- a/drivers/Kconfig
+++ b/drivers/Kconfig
@@ -60,6 +60,8 @@ source "drivers/pcmcia/Kconfig"
source "drivers/phy/Kconfig"
+source "drivers/phy/allwinner/Kconfig"
+
source "drivers/phy/marvell/Kconfig"
source "drivers/pinctrl/Kconfig"
diff --git a/drivers/Makefile b/drivers/Makefile
index e6062a5..6862a44 100644
--- a/drivers/Makefile
+++ b/drivers/Makefile
@@ -79,6 +79,7 @@ obj-$(CONFIG_NVME) += nvme/
obj-y += pcmcia/
obj-y += dfu/
obj-$(CONFIG_X86) += pch/
+obj-y += phy/allwinner/
obj-y += phy/marvell/
obj-y += rtc/
obj-y += scsi/
diff --git a/drivers/phy/allwinner/Kconfig b/drivers/phy/allwinner/Kconfig
new file mode 100644
index 0000000..dba3bae
--- /dev/null
+++ b/drivers/phy/allwinner/Kconfig
@@ -0,0 +1,13 @@
+#
+# Phy drivers for Allwinner platforms
+#
+config PHY_SUN4I_USB
+ bool "Allwinner Sun4I USB PHY driver"
+ depends on ARCH_SUNXI
+ select PHY
+ help
+ Enable this to support the transceiver that is part of Allwinner
+ sunxi SoCs.
+
+ This driver controls the entire USB PHY block, both the USB OTG
+ parts, as well as the 2 regular USB 2 host PHYs.
diff --git a/drivers/phy/allwinner/Makefile b/drivers/phy/allwinner/Makefile
new file mode 100644
index 0000000..5ed2702
--- /dev/null
+++ b/drivers/phy/allwinner/Makefile
@@ -0,0 +1,6 @@
+# Copyright (C) 2016 Amarula Solutions
+#
+# SPDX-License-Identifier: GPL-2.0+
+#
+
+obj-$(CONFIG_PHY_SUN4I_USB) += phy-sun4i-usb.o
diff --git a/drivers/phy/allwinner/phy-sun4i-usb.c b/drivers/phy/allwinner/phy-sun4i-usb.c
new file mode 100644
index 0000000..78304c1
--- /dev/null
+++ b/drivers/phy/allwinner/phy-sun4i-usb.c
@@ -0,0 +1,400 @@
+/*
+ * Allwinner sun4i USB PHY driver
+ *
+ * Copyright (C) 2017 Jagan Teki <jagan at amarulasolutions.com>
+ * Copyright (C) 2015 Hans de Goede <hdegoede at redhat.com>
+ * Copyright (C) 2014 Roman Byshko <rbyshko at 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),
+};
--
2.7.4
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