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|
/*
* 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 <clk.h>
#include <dm.h>
#include <log.h>
#include <dm/device.h>
#include <generic-phy.h>
#include <phy-sun4i-usb.h>
#include <reset.h>
#include <asm/gpio.h>
#include <asm/io.h>
#include <asm/arch/clock.h>
#include <asm/arch/cpu.h>
#include <dm/device_compat.h>
#include <linux/bitops.h>
#include <linux/delay.h>
#include <linux/err.h>
#include <power/regulator.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 PHY_SQUELCH_DETECT 0x3c
#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)
/* A83T specific control bits for PHY0 */
#define PHY_CTL_VBUSVLDEXT BIT(5)
#define PHY_CTL_SIDDQ BIT(3)
/* A83T specific control bits for PHY2 HSIC */
#define SUNXI_EHCI_HS_FORCE BIT(20)
#define SUNXI_HSIC_CONNECT_INT BIT(16)
#define SUNXI_HSIC BIT(1)
#define MAX_PHYS 4
enum sun4i_usb_phy_type {
sun4i_a10_phy,
sun6i_a31_phy,
sun8i_a33_phy,
sun8i_a83t_phy,
sun8i_h3_phy,
sun8i_r40_phy,
sun8i_v3s_phy,
sun50i_a64_phy,
sun50i_h6_phy,
};
struct sun4i_usb_phy_cfg {
int num_phys;
enum sun4i_usb_phy_type type;
u32 disc_thresh;
u8 phyctl_offset;
bool dedicated_clocks;
bool enable_pmu_unk1;
bool phy0_dual_route;
int missing_phys;
};
struct sun4i_usb_phy_info {
const char *gpio_vbus;
const char *gpio_vbus_det;
const char *gpio_id_det;
} phy_info[] = {
{
.gpio_vbus = CONFIG_USB0_VBUS_PIN,
.gpio_vbus_det = CONFIG_USB0_VBUS_DET,
.gpio_id_det = CONFIG_USB0_ID_DET,
},
{
.gpio_vbus = CONFIG_USB1_VBUS_PIN,
.gpio_vbus_det = NULL,
.gpio_id_det = NULL,
},
{
.gpio_vbus = CONFIG_USB2_VBUS_PIN,
.gpio_vbus_det = NULL,
.gpio_id_det = NULL,
},
{
.gpio_vbus = CONFIG_USB3_VBUS_PIN,
.gpio_vbus_det = NULL,
.gpio_id_det = NULL,
},
};
struct sun4i_usb_phy_plat {
void __iomem *pmu;
int power_on_count;
int gpio_vbus;
int gpio_vbus_det;
int gpio_id_det;
struct clk clocks;
struct reset_ctl resets;
int id;
};
struct sun4i_usb_phy_data {
void __iomem *base;
const struct sun4i_usb_phy_cfg *cfg;
struct sun4i_usb_phy_plat *usb_phy;
struct udevice *vbus_power_supply;
};
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 phy *phy, bool enable)
{
struct sun4i_usb_phy_data *data = dev_get_priv(phy->dev);
struct sun4i_usb_phy_plat *usb_phy = &data->usb_phy[phy->id];
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;
/* A83T USB2 is HSIC */
if (data->cfg->type == sun8i_a83t_phy && usb_phy->id == 2)
bits |= SUNXI_EHCI_HS_FORCE | SUNXI_HSIC_CONNECT_INT |
SUNXI_HSIC;
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;
int ret;
ret = clk_enable(&usb_phy->clocks);
if (ret) {
dev_err(phy->dev, "failed to enable usb_%ldphy clock\n",
phy->id);
return ret;
}
ret = reset_deassert(&usb_phy->resets);
if (ret) {
dev_err(phy->dev, "failed to deassert usb_%ldreset reset\n",
phy->id);
return ret;
}
if (data->cfg->type == sun8i_a83t_phy ||
data->cfg->type == sun50i_h6_phy) {
if (phy->id == 0) {
val = readl(data->base + data->cfg->phyctl_offset);
val |= PHY_CTL_VBUSVLDEXT;
val &= ~PHY_CTL_SIDDQ;
writel(val, data->base + data->cfg->phyctl_offset);
}
} else {
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);
}
#ifdef CONFIG_USB_MUSB_SUNXI
/* Needed for HCI and conflicts with MUSB, keep PHY0 on MUSB */
if (usb_phy->id != 0)
sun4i_usb_phy_passby(phy, true);
/* Route PHY0 to MUSB to allow USB gadget */
if (data->cfg->phy0_dual_route)
sun4i_usb_phy0_reroute(data, true);
#else
sun4i_usb_phy_passby(phy, true);
/* Route PHY0 to HCI to allow USB host */
if (data->cfg->phy0_dual_route)
sun4i_usb_phy0_reroute(data, false);
#endif
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];
int ret;
if (phy->id == 0) {
if (data->cfg->type == sun8i_a83t_phy ||
data->cfg->type == sun50i_h6_phy) {
void __iomem *phyctl = data->base +
data->cfg->phyctl_offset;
writel(readl(phyctl) | PHY_CTL_SIDDQ, phyctl);
}
}
sun4i_usb_phy_passby(phy, false);
ret = clk_disable(&usb_phy->clocks);
if (ret) {
dev_err(phy->dev, "failed to disable usb_%ldphy clock\n",
phy->id);
return ret;
}
ret = reset_assert(&usb_phy->resets);
if (ret) {
dev_err(phy->dev, "failed to assert usb_%ldreset reset\n",
phy->id);
return ret;
}
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 (data->cfg->missing_phys & BIT(args->args[0]))
return -ENODEV;
if (args->args_count)
phy->id = args->args[0];
else
phy->id = 0;
debug("%s: phy_id = %ld\n", __func__, phy->id);
return 0;
}
int sun4i_usb_phy_vbus_detect(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];
int err = 1, retries = 3;
if (usb_phy->gpio_vbus_det >= 0) {
err = gpio_get_value(usb_phy->gpio_vbus_det);
/*
* Vbus may have been provided by the board and just turned off
* some milliseconds ago on reset. What we're measuring then is
* a residual charge on Vbus. Sleep a bit and try again.
*/
while (err > 0 && retries--) {
mdelay(100);
err = gpio_get_value(usb_phy->gpio_vbus_det);
}
} else if (data->vbus_power_supply) {
err = regulator_get_enable(data->vbus_power_supply);
}
return err;
}
int sun4i_usb_phy_id_detect(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 (usb_phy->gpio_id_det < 0)
return usb_phy->gpio_id_det;
return gpio_get_value(usb_phy->gpio_id_det);
}
void sun4i_usb_phy_set_squelch_detect(struct phy *phy, bool enabled)
{
sun4i_usb_phy_write(phy, PHY_SQUELCH_DETECT, enabled ? 0 : 2, 2);
}
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_plat(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);
device_get_supply_regulator(dev, "usb0_vbus_power-supply",
&data->vbus_power_supply);
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];
if (data->cfg->missing_phys & BIT(i))
continue;
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 (data->cfg->dedicated_clocks)
snprintf(name, sizeof(name), "usb%d_phy", i);
else
strlcpy(name, "usb_phy", sizeof(name));
ret = clk_get_by_name(dev, name, &phy->clocks);
if (ret) {
dev_err(dev, "failed to get usb%d_phy clock phandle\n", i);
return ret;
}
snprintf(name, sizeof(name), "usb%d_reset", i);
ret = reset_get_by_name(dev, name, &phy->resets);
if (ret) {
dev_err(dev, "failed to get usb%d_reset reset phandle\n", i);
return ret;
}
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;
};
debug("Allwinner Sun4I USB PHY driver loaded\n");
return 0;
}
static const struct sun4i_usb_phy_cfg sun4i_a10_cfg = {
.num_phys = 3,
.type = sun4i_a10_phy,
.disc_thresh = 3,
.phyctl_offset = REG_PHYCTL_A10,
.dedicated_clocks = false,
.enable_pmu_unk1 = false,
};
static const struct sun4i_usb_phy_cfg sun5i_a13_cfg = {
.num_phys = 2,
.type = sun4i_a10_phy,
.disc_thresh = 2,
.phyctl_offset = REG_PHYCTL_A10,
.dedicated_clocks = false,
.enable_pmu_unk1 = false,
};
static const struct sun4i_usb_phy_cfg sun6i_a31_cfg = {
.num_phys = 3,
.type = sun6i_a31_phy,
.disc_thresh = 3,
.phyctl_offset = REG_PHYCTL_A10,
.dedicated_clocks = true,
.enable_pmu_unk1 = false,
};
static const struct sun4i_usb_phy_cfg sun7i_a20_cfg = {
.num_phys = 3,
.type = sun4i_a10_phy,
.disc_thresh = 2,
.phyctl_offset = REG_PHYCTL_A10,
.dedicated_clocks = false,
.enable_pmu_unk1 = false,
};
static const struct sun4i_usb_phy_cfg sun8i_a23_cfg = {
.num_phys = 2,
.type = sun4i_a10_phy,
.disc_thresh = 3,
.phyctl_offset = REG_PHYCTL_A10,
.dedicated_clocks = true,
.enable_pmu_unk1 = false,
};
static const struct sun4i_usb_phy_cfg sun8i_a33_cfg = {
.num_phys = 2,
.type = sun8i_a33_phy,
.disc_thresh = 3,
.phyctl_offset = REG_PHYCTL_A33,
.dedicated_clocks = true,
.enable_pmu_unk1 = false,
};
static const struct sun4i_usb_phy_cfg sun8i_a83t_cfg = {
.num_phys = 3,
.type = sun8i_a83t_phy,
.phyctl_offset = REG_PHYCTL_A33,
.dedicated_clocks = true,
};
static const struct sun4i_usb_phy_cfg sun8i_h3_cfg = {
.num_phys = 4,
.type = sun8i_h3_phy,
.disc_thresh = 3,
.phyctl_offset = REG_PHYCTL_A33,
.dedicated_clocks = true,
.enable_pmu_unk1 = true,
.phy0_dual_route = true,
};
static const struct sun4i_usb_phy_cfg sun8i_r40_cfg = {
.num_phys = 3,
.type = sun8i_r40_phy,
.disc_thresh = 3,
.phyctl_offset = REG_PHYCTL_A33,
.dedicated_clocks = true,
.enable_pmu_unk1 = true,
.phy0_dual_route = true,
};
static const struct sun4i_usb_phy_cfg sun8i_v3s_cfg = {
.num_phys = 1,
.type = sun8i_v3s_phy,
.disc_thresh = 3,
.phyctl_offset = REG_PHYCTL_A33,
.dedicated_clocks = true,
.enable_pmu_unk1 = true,
.phy0_dual_route = true,
};
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,
.dedicated_clocks = true,
.enable_pmu_unk1 = true,
.phy0_dual_route = true,
};
static const struct sun4i_usb_phy_cfg sun50i_h6_cfg = {
.num_phys = 4,
.type = sun50i_h6_phy,
.disc_thresh = 3,
.phyctl_offset = REG_PHYCTL_A33,
.dedicated_clocks = true,
.enable_pmu_unk1 = true,
.phy0_dual_route = true,
.missing_phys = BIT(1) | BIT(2),
};
static const struct udevice_id sun4i_usb_phy_ids[] = {
{ .compatible = "allwinner,sun4i-a10-usb-phy", .data = (ulong)&sun4i_a10_cfg },
{ .compatible = "allwinner,sun5i-a13-usb-phy", .data = (ulong)&sun5i_a13_cfg },
{ .compatible = "allwinner,sun6i-a31-usb-phy", .data = (ulong)&sun6i_a31_cfg },
{ .compatible = "allwinner,sun7i-a20-usb-phy", .data = (ulong)&sun7i_a20_cfg },
{ .compatible = "allwinner,sun8i-a23-usb-phy", .data = (ulong)&sun8i_a23_cfg },
{ .compatible = "allwinner,sun8i-a33-usb-phy", .data = (ulong)&sun8i_a33_cfg },
{ .compatible = "allwinner,sun8i-a83t-usb-phy", .data = (ulong)&sun8i_a83t_cfg },
{ .compatible = "allwinner,sun8i-h3-usb-phy", .data = (ulong)&sun8i_h3_cfg },
{ .compatible = "allwinner,sun8i-r40-usb-phy", .data = (ulong)&sun8i_r40_cfg },
{ .compatible = "allwinner,sun8i-v3s-usb-phy", .data = (ulong)&sun8i_v3s_cfg },
{ .compatible = "allwinner,sun50i-a64-usb-phy", .data = (ulong)&sun50i_a64_cfg},
{ .compatible = "allwinner,sun50i-h6-usb-phy", .data = (ulong)&sun50i_h6_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,
.plat_auto = sizeof(struct sun4i_usb_phy_plat[MAX_PHYS]),
.priv_auto = sizeof(struct sun4i_usb_phy_data),
};
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