[PATCH 2/4] phy: socionext: add USB3 PHY driver for UniPhier SoC

Kunihiko Hayashi
2018-06-29T08:38:59Z

Add a driver for PHY interface built into USB3 controller
implemented in UniPhier SoCs.
This driver supports High-Speed PHY and Super-Speed PHY.

Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
Signed-off-by: Motoya Tanigawa <tanigawa.motoya@socionext.com>
Signed-off-by: Masami Hiramatsu <masami.hiramatsu@linaro.org>
---
drivers/phy/Kconfig | 1 +
drivers/phy/Makefile | 1 +
drivers/phy/socionext/Kconfig | 12 +
drivers/phy/socionext/Makefile | 6 +
drivers/phy/socionext/phy-uniphier-usb3hs.c | 422 ++++++++++++++++++++++++++++
drivers/phy/socionext/phy-uniphier-usb3ss.c | 369 ++++++++++++++++++++++++
6 files changed, 811 insertions(+)
create mode 100644 drivers/phy/socionext/Kconfig
create mode 100644 drivers/phy/socionext/Makefile
create mode 100644 drivers/phy/socionext/phy-uniphier-usb3hs.c
create mode 100644 drivers/phy/socionext/phy-uniphier-usb3ss.c

diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig
index 5c8d452..b752589 100644
--- a/drivers/phy/Kconfig
+++ b/drivers/phy/Kconfig
@@ -53,6 +53,7 @@ source "drivers/phy/ralink/Kconfig"
source "drivers/phy/renesas/Kconfig"
source "drivers/phy/rockchip/Kconfig"
source "drivers/phy/samsung/Kconfig"
+source "drivers/phy/socionext/Kconfig"
source "drivers/phy/st/Kconfig"
source "drivers/phy/tegra/Kconfig"
source "drivers/phy/ti/Kconfig"
diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile
index 84e3bd9..5539cde 100644
--- a/drivers/phy/Makefile
+++ b/drivers/phy/Makefile
@@ -21,5 +21,6 @@ obj-y += broadcom/ \
qualcomm/ \
ralink/ \
samsung/ \
+ socionext/ \
st/ \
ti/
diff --git a/drivers/phy/socionext/Kconfig b/drivers/phy/socionext/Kconfig
new file mode 100644
index 0000000..4a172fc
--- /dev/null
+++ b/drivers/phy/socionext/Kconfig
@@ -0,0 +1,12 @@
+#
+# PHY drivers for Socionext platforms.
+#
+
+config PHY_UNIPHIER_USB3
+ tristate "UniPhier USB3 PHY driver"
+ depends on ARCH_UNIPHIER || COMPILE_TEST
+ depends on OF && HAS_IOMEM
+ select GENERIC_PHY
+ help
+ Enable this to support USB PHY implemented in USB3 controller
+ on UniPhier SoCs. This controller supports USB3.0 and lower speed.
diff --git a/drivers/phy/socionext/Makefile b/drivers/phy/socionext/Makefile
new file mode 100644
index 0000000..dfa5cec
--- /dev/null
+++ b/drivers/phy/socionext/Makefile
@@ -0,0 +1,6 @@
+# SPDX-identifier: GPL-2.0
+#
+# Makefile for the phy drivers.
+#
+
+obj-$(CONFIG_PHY_UNIPHIER_USB3) += phy-uniphier-usb3hs.o phy-uniphier-usb3ss.o
diff --git a/drivers/phy/socionext/phy-uniphier-usb3hs.c b/drivers/phy/socionext/phy-uniphier-usb3hs.c
new file mode 100644
index 0000000..cea8983
--- /dev/null
+++ b/drivers/phy/socionext/phy-uniphier-usb3hs.c
@@ -0,0 +1,422 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * phy-uniphier-usb3hs.c - HS-PHY driver for Socionext UniPhier USB3 controller
+ * Copyright 2015-2018 Socionext Inc.
+ * Author:
+ * Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
+ * Contributors:
+ * Motoya Tanigawa <tanigawa.motoya@socionext.com>
+ * Masami Hiramatsu <masami.hiramatsu@linaro.org>
+ */
+
+#include <linux/bitfield.h>
+#include <linux/bitops.h>
+#include <linux/clk.h>
+#include <linux/io.h>
+#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/nvmem-consumer.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/phy/phy.h>
+#include <linux/platform_device.h>
+#include <linux/reset.h>
+#include <linux/slab.h>
+
+#define HSPHY_CFG0 0x0
+#define HSPHY_CFG0_HS_I_MASK GENMASK(31, 28)
+#define HSPHY_CFG0_HSDISC_MASK GENMASK(27, 26)
+#define HSPHY_CFG0_SWING_MASK GENMASK(17, 16)
+#define HSPHY_CFG0_SEL_T_MASK GENMASK(15, 12)
+#define HSPHY_CFG0_RTERM_MASK GENMASK(7, 6)
+#define HSPHY_CFG0_TRIMMASK (HSPHY_CFG0_HS_I_MASK \
+ | HSPHY_CFG0_SEL_T_MASK \
+ | HSPHY_CFG0_RTERM_MASK)
+
+#define HSPHY_CFG1 0x4
+#define HSPHY_CFG1_DAT_EN BIT(29)
+#define HSPHY_CFG1_ADR_EN BIT(28)
+#define HSPHY_CFG1_ADR_MASK GENMASK(27, 16)
+#define HSPHY_CFG1_DAT_MASK GENMASK(23, 16)
+
+#define MAX_CLKS 3
+#define MAX_RSTS 2
+#define MAX_PHY_PARAMS 1
+
+struct uniphier_u3hsphy_param {
+ u32 addr;
+ u32 mask;
+ u32 val;
+};
+
+struct uniphier_u3hsphy_trim_param {
+ unsigned int rterm;
+ unsigned int sel_t;
+ unsigned int hs_i;
+};
+
+#define trim_param_is_valid(p) ((p)->rterm || (p)->sel_t || (p)->hs_i)
+
+struct uniphier_u3hsphy_priv {
+ struct device *dev;
+ void __iomem *base;
+ int nclks;
+ struct clk *clk[MAX_CLKS], *clk_phy, *clk_phy_ext;
+ int nrsts;
+ struct reset_control *rst[MAX_RSTS], *rst_phy;
+ const struct uniphier_u3hsphy_soc_data *data;
+};
+
+struct uniphier_u3hsphy_soc_data {
+ const char *clock_names[MAX_CLKS];
+ const char *reset_names[MAX_RSTS];
+ int nparams;
+ const struct uniphier_u3hsphy_param param[MAX_PHY_PARAMS];
+ u32 config0;
+ u32 config1;
+ void (*trim_func)(struct uniphier_u3hsphy_priv *priv, u32 *pconfig,
+ struct uniphier_u3hsphy_trim_param *pt);
+};
+
+static void uniphier_u3hsphy_trim_ld20(struct uniphier_u3hsphy_priv *priv,
+ u32 *pconfig,
+ struct uniphier_u3hsphy_trim_param *pt)
+{
+ *pconfig &= ~HSPHY_CFG0_RTERM_MASK;
+ *pconfig |= FIELD_PREP(HSPHY_CFG0_RTERM_MASK, pt->rterm);
+
+ *pconfig &= ~HSPHY_CFG0_SEL_T_MASK;
+ *pconfig |= FIELD_PREP(HSPHY_CFG0_SEL_T_MASK, pt->sel_t);
+
+ *pconfig &= ~HSPHY_CFG0_HS_I_MASK;
+ *pconfig |= FIELD_PREP(HSPHY_CFG0_HS_I_MASK, pt->hs_i);
+}
+
+static int uniphier_u3hsphy_get_nvparam(struct uniphier_u3hsphy_priv *priv,
+ const char *name, unsigned int *val)
+{
+ struct nvmem_cell *cell;
+ u8 *buf;
+
+ cell = devm_nvmem_cell_get(priv->dev, name);
+ if (IS_ERR(cell))
+ return PTR_ERR(cell);
+
+ buf = nvmem_cell_read(cell, NULL);
+ if (IS_ERR(buf))
+ return PTR_ERR(buf);
+
+ *val = *buf;
+
+ kfree(buf);
+
+ return 0;
+}
+
+static int uniphier_u3hsphy_get_nvparams(struct uniphier_u3hsphy_priv *priv,
+ struct uniphier_u3hsphy_trim_param *pt)
+{
+ int ret;
+
+ ret = uniphier_u3hsphy_get_nvparam(priv, "rterm", &pt->rterm);
+ if (ret)
+ return ret;
+
+ ret = uniphier_u3hsphy_get_nvparam(priv, "sel_t", &pt->sel_t);
+ if (ret)
+ return ret;
+
+ ret = uniphier_u3hsphy_get_nvparam(priv, "hs_i", &pt->hs_i);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static int uniphier_u3hsphy_update_config(struct uniphier_u3hsphy_priv *priv,
+ u32 *pconfig)
+{
+ struct uniphier_u3hsphy_trim_param trim;
+ int ret, trimmed = 0;
+
+ if (priv->data->trim_func) {
+ ret = uniphier_u3hsphy_get_nvparams(priv, &trim);
+ if (ret == -EPROBE_DEFER)
+ return ret;
+
+ /*
+ * call trim_func only when trimming parameters that aren't
+ * all-zero can be acquired. All-zero parameters mean nothing
+ * has been written to nvmem.
+ */
+ if (!ret && trim_param_is_valid(&trim)) {
+ priv->data->trim_func(priv, pconfig, &trim);
+ trimmed = 1;
+ } else {
+ dev_dbg(priv->dev, "can't get parameter from nvmem\n");
+ }
+ }
+
+ /* use default parameters without trimming values */
+ if (!trimmed) {
+ *pconfig &= ~HSPHY_CFG0_HSDISC_MASK;
+ *pconfig |= FIELD_PREP(HSPHY_CFG0_HSDISC_MASK, 3);
+ }
+
+ return 0;
+}
+
+static void uniphier_u3hsphy_set_param(struct uniphier_u3hsphy_priv *priv,
+ const struct uniphier_u3hsphy_param *p)
+{
+ u32 val;
+
+ val = readl(priv->base + HSPHY_CFG1);
+ val &= ~HSPHY_CFG1_ADR_MASK;
+ val |= FIELD_PREP(HSPHY_CFG1_ADR_MASK, p->addr) | HSPHY_CFG1_ADR_EN;
+ writel(val, priv->base + HSPHY_CFG1);
+
+ val = readl(priv->base + HSPHY_CFG1);
+ val &= ~HSPHY_CFG1_ADR_EN;
+ writel(val, priv->base + HSPHY_CFG1);
+
+ val = readl(priv->base + HSPHY_CFG1);
+ val &= ~FIELD_PREP(HSPHY_CFG1_DAT_MASK, p->mask);
+ val |= FIELD_PREP(HSPHY_CFG1_DAT_MASK, p->val) | HSPHY_CFG1_DAT_EN;
+ writel(val, priv->base + HSPHY_CFG1);
+
+ val = readl(priv->base + HSPHY_CFG1);
+ val &= ~HSPHY_CFG1_DAT_EN;
+ writel(val, priv->base + HSPHY_CFG1);
+}
+
+static int uniphier_u3hsphy_init(struct phy *phy)
+{
+ struct uniphier_u3hsphy_priv *priv = phy_get_drvdata(phy);
+ u32 config0, config1;
+ int i, ret;
+
+ ret = clk_prepare_enable(priv->clk_phy_ext);
+ if (ret)
+ return ret;
+
+ ret = clk_prepare_enable(priv->clk_phy);
+ if (ret)
+ goto out_clk_ext_disable;
+
+ ret = reset_control_deassert(priv->rst_phy);
+ if (ret)
+ goto out_clk_disable;
+
+ if (!priv->data->config0 && !priv->data->config1)
+ return 0;
+
+ config0 = priv->data->config0;
+ config1 = priv->data->config1;
+
+ ret = uniphier_u3hsphy_update_config(priv, &config0);
+ if (ret)
+ goto out_rst_assert;
+
+ writel(config0, priv->base + HSPHY_CFG0);
+ writel(config1, priv->base + HSPHY_CFG1);
+
+ for (i = 0; i < priv->data->nparams; i++)
+ uniphier_u3hsphy_set_param(priv, &priv->data->param[i]);
+
+ return 0;
+
+out_rst_assert:
+ reset_control_assert(priv->rst_phy);
+out_clk_disable:
+ clk_disable_unprepare(priv->clk_phy);
+out_clk_ext_disable:
+ clk_disable_unprepare(priv->clk_phy_ext);
+
+ return ret;
+}
+
+static int uniphier_u3hsphy_exit(struct phy *phy)
+{
+ struct uniphier_u3hsphy_priv *priv = phy_get_drvdata(phy);
+
+ reset_control_assert(priv->rst_phy);
+ clk_disable_unprepare(priv->clk_phy);
+ clk_disable_unprepare(priv->clk_phy_ext);
+
+ return 0;
+}
+
+static const struct phy_ops uniphier_u3hsphy_ops = {
+ .init = uniphier_u3hsphy_init,
+ .exit = uniphier_u3hsphy_exit,
+ .owner = THIS_MODULE,
+};
+
+static int uniphier_u3hsphy_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct uniphier_u3hsphy_priv *priv;
+ struct phy_provider *phy_provider;
+ struct resource *res;
+ struct phy *phy;
+ struct clk *clk;
+ struct reset_control *rst;
+ const char *name;
+ int i, ret, nc, nr;
+
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ priv->dev = dev;
+ priv->data = of_device_get_match_data(dev);
+ if (WARN_ON(!priv->data ||
+ priv->data->nparams > MAX_PHY_PARAMS))
+ return -EINVAL;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ priv->base = devm_ioremap_resource(dev, res);
+ if (IS_ERR(priv->base))
+ return PTR_ERR(priv->base);
+
+ for (i = 0; i < MAX_CLKS; i++) {
+ name = priv->data->clock_names[i];
+ if (!name)
+ break;
+ clk = devm_clk_get(dev, name);
+ /* "phy-ext" is optional */
+ if (!strcmp(name, "phy-ext")) {
+ if (PTR_ERR(clk) == -ENOENT)
+ clk = NULL;
+ priv->clk_phy_ext = clk;
+ } else if (!strcmp(name, "phy")) {
+ priv->clk_phy = clk;
+ } else {
+ priv->clk[priv->nclks++] = clk;
+ }
+ if (IS_ERR(clk))
+ return PTR_ERR(clk);
+ }
+
+ for (i = 0; i < MAX_RSTS; i++) {
+ name = priv->data->reset_names[i];
+ if (!name)
+ break;
+ rst = devm_reset_control_get_shared(dev, name);
+ if (IS_ERR(rst))
+ return PTR_ERR(rst);
+
+ if (!strcmp(name, "phy"))
+ priv->rst_phy = rst;
+ else
+ priv->rst[priv->nrsts++] = rst;
+ }
+
+ phy = devm_phy_create(dev, dev->of_node, &uniphier_u3hsphy_ops);
+ if (IS_ERR(phy))
+ return PTR_ERR(phy);
+
+ for (nc = 0; nc < priv->nclks; nc++) {
+ ret = clk_prepare_enable(priv->clk[nc]);
+ if (ret)
+ goto out_clk_disable;
+ }
+
+ for (nr = 0; nr < priv->nrsts; nr++) {
+ ret = reset_control_deassert(priv->rst[nr]);
+ if (ret)
+ goto out_rst_assert;
+ }
+
+ platform_set_drvdata(pdev, priv);
+ phy_set_drvdata(phy, priv);
+ phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
+ if (IS_ERR(phy_provider)) {
+ ret = PTR_ERR(phy_provider);
+ goto out_rst_assert;
+ }
+
+ return 0;
+
+out_rst_assert:
+ while (nr--)
+ reset_control_assert(priv->rst[nr]);
+out_clk_disable:
+ while (nc--)
+ clk_disable_unprepare(priv->clk[nc]);
+
+ return ret;
+}
+
+static int uniphier_u3hsphy_remove(struct platform_device *pdev)
+{
+ struct uniphier_u3hsphy_priv *priv = platform_get_drvdata(pdev);
+ int i;
+
+ for (i = 0; i < priv->nrsts; i++)
+ reset_control_assert(priv->rst[i]);
+ for (i = 0; i < priv->nclks; i++)
+ clk_disable_unprepare(priv->clk[i]);
+
+ return 0;
+}
+
+static const struct uniphier_u3hsphy_soc_data uniphier_pxs2_data = {
+ .clock_names = { "link", "phy", },
+ .reset_names = { "link", "phy", },
+ .nparams = 0,
+};
+
+static const struct uniphier_u3hsphy_soc_data uniphier_ld20_data = {
+ .clock_names = { "link", "phy", },
+ .reset_names = { "link", "phy", },
+ .nparams = 1,
+ .param = {
+ { 10, 0x60, 0x60 },
+ },
+ .trim_func = uniphier_u3hsphy_trim_ld20,
+ .config0 = 0x92316680,
+ .config1 = 0x00000106,
+};
+
+static const struct uniphier_u3hsphy_soc_data uniphier_pxs3_data = {
+ .clock_names = { "link", "phy", "phy-ext", },
+ .reset_names = { "link", "phy", },
+ .nparams = 0,
+ .trim_func = uniphier_u3hsphy_trim_ld20,
+ .config0 = 0x92316680,
+ .config1 = 0x00000106,
+};
+
+static const struct of_device_id uniphier_u3hsphy_match[] = {
+ {
+ .compatible = "socionext,uniphier-pxs2-usb3-hsphy",
+ .data = &uniphier_pxs2_data,
+ },
+ {
+ .compatible = "socionext,uniphier-ld20-usb3-hsphy",
+ .data = &uniphier_ld20_data,
+ },
+ {
+ .compatible = "socionext,uniphier-pxs3-usb3-hsphy",
+ .data = &uniphier_pxs3_data,
+ },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, uniphier_u3hsphy_match);
+
+static struct platform_driver uniphier_u3hsphy_driver = {
+ .probe = uniphier_u3hsphy_probe,
+ .remove = uniphier_u3hsphy_remove,
+ .driver = {
+ .name = "uniphier-usb3-hsphy",
+ .of_match_table = uniphier_u3hsphy_match,
+ },
+};
+
+module_platform_driver(uniphier_u3hsphy_driver);
+
+MODULE_AUTHOR("Kunihiko Hayashi <hayashi.kunihiko@socionext.com>");
+MODULE_DESCRIPTION("UniPhier HS-PHY driver for USB3 controller");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/phy/socionext/phy-uniphier-usb3ss.c b/drivers/phy/socionext/phy-uniphier-usb3ss.c
new file mode 100644
index 0000000..6c2fc36
--- /dev/null
+++ b/drivers/phy/socionext/phy-uniphier-usb3ss.c
@@ -0,0 +1,369 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * phy-uniphier-usb3ss.c - SS-PHY driver for Socionext UniPhier USB3 controller
+ * Copyright 2015-2018 Socionext Inc.
+ * Author:
+ * Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
+ * Contributors:
+ * Motoya Tanigawa <tanigawa.motoya@socionext.com>
+ * Masami Hiramatsu <masami.hiramatsu@linaro.org>
+ */
+
+#include <linux/bitfield.h>
+#include <linux/bitops.h>
+#include <linux/clk.h>
+#include <linux/io.h>
+#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/phy/phy.h>
+#include <linux/platform_device.h>
+#include <linux/reset.h>
+
+#define SSPHY_TESTI 0x0
+#define SSPHY_TESTO 0x4
+#define TESTI_DAT_MASK GENMASK(13, 6)
+#define TESTI_ADR_MASK GENMASK(5, 1)
+#define TESTI_WR_EN BIT(0)
+
+#define MAX_CLKS 3
+#define MAX_RSTS 2
+#define MAX_PHY_PARAMS 7
+
+struct uniphier_u3ssphy_param {
+ u32 addr;
+ u32 mask;
+ u32 val;
+};
+
+struct uniphier_u3ssphy_priv {
+ struct device *dev;
+ void __iomem *base;
+ int nclks;
+ struct clk *clk[MAX_CLKS], *clk_phy, *clk_phy_ext;
+ int nrsts;
+ struct reset_control *rst[MAX_RSTS], *rst_phy;
+ const struct uniphier_u3ssphy_soc_data *data;
+};
+
+struct uniphier_u3ssphy_soc_data {
+ const char *clock_names[MAX_CLKS];
+ const char *reset_names[MAX_RSTS];
+ int nparams;
+ const struct uniphier_u3ssphy_param param[MAX_PHY_PARAMS];
+ bool is_legacy;
+};
+
+static void uniphier_u3ssphy_testio_write(struct uniphier_u3ssphy_priv *priv,
+ u32 data)
+{
+ /* need to read TESTO twice after accessing TESTI */
+ writel(data, priv->base + SSPHY_TESTI);
+ readl(priv->base + SSPHY_TESTI);
+ readl(priv->base + SSPHY_TESTI);
+}
+
+static void uniphier_u3ssphy_set_param(struct uniphier_u3ssphy_priv *priv,
+ const struct uniphier_u3ssphy_param *p)
+{
+ u32 val, val_prev;
+
+ /* read previous data */
+ val = FIELD_PREP(TESTI_DAT_MASK, 1);
+ val |= FIELD_PREP(TESTI_ADR_MASK, p->addr);
+ uniphier_u3ssphy_testio_write(priv, val);
+ val_prev = readl(priv->base + SSPHY_TESTO);
+
+ /* update value */
+ val = FIELD_PREP(TESTI_DAT_MASK,
+ (val_prev & ~p->mask) | (p->val & p->mask));
+ val |= FIELD_PREP(TESTI_ADR_MASK, p->addr);
+ uniphier_u3ssphy_testio_write(priv, val);
+ uniphier_u3ssphy_testio_write(priv, val | TESTI_WR_EN);
+ uniphier_u3ssphy_testio_write(priv, val);
+
+ /* read current data as dummy */
+ val = FIELD_PREP(TESTI_DAT_MASK, 1);
+ val |= FIELD_PREP(TESTI_ADR_MASK, p->addr);
+ uniphier_u3ssphy_testio_write(priv, val);
+ readl(priv->base + SSPHY_TESTO);
+}
+
+static void
+uniphier_u3ssphy_legacy_testio_write(struct uniphier_u3ssphy_priv *priv,
+ u32 data)
+{
+ int i;
+
+ /* need to read TESTO 10 times after accessing TESTI */
+ writel(data, priv->base + SSPHY_TESTI);
+ for (i = 0; i < 10; i++)
+ readl(priv->base + SSPHY_TESTO);
+}
+
+static void
+uniphier_u3ssphy_legacy_set_param(struct uniphier_u3ssphy_priv *priv,
+ const struct uniphier_u3ssphy_param *p)
+{
+ u32 val;
+
+ val = FIELD_PREP(TESTI_DAT_MASK, p->val & p->mask);
+ val |= FIELD_PREP(TESTI_ADR_MASK, p->addr);
+ uniphier_u3ssphy_legacy_testio_write(priv, val);
+ uniphier_u3ssphy_legacy_testio_write(priv, val | TESTI_WR_EN);
+ uniphier_u3ssphy_legacy_testio_write(priv, val);
+}
+
+static int uniphier_u3ssphy_init(struct phy *phy)
+{
+ struct uniphier_u3ssphy_priv *priv = phy_get_drvdata(phy);
+ int i, ret;
+
+ ret = clk_prepare_enable(priv->clk_phy_ext);
+ if (ret)
+ return ret;
+
+ ret = clk_prepare_enable(priv->clk_phy);
+ if (ret)
+ goto out_clk_ext_disable;
+
+ ret = reset_control_deassert(priv->rst_phy);
+ if (ret)
+ goto out_clk_disable;
+
+ for (i = 0; i < priv->data->nparams; i++)
+ if (priv->data->is_legacy)
+ uniphier_u3ssphy_legacy_set_param(priv,
+ &priv->data->param[i]);
+ else
+ uniphier_u3ssphy_set_param(priv,
+ &priv->data->param[i]);
+
+ return 0;
+
+out_clk_disable:
+ clk_disable_unprepare(priv->clk_phy);
+out_clk_ext_disable:
+ clk_disable_unprepare(priv->clk_phy_ext);
+
+ return ret;
+}
+
+static int uniphier_u3ssphy_exit(struct phy *phy)
+{
+ struct uniphier_u3ssphy_priv *priv = phy_get_drvdata(phy);
+
+ reset_control_assert(priv->rst_phy);
+ clk_disable_unprepare(priv->clk_phy);
+ clk_disable_unprepare(priv->clk_phy_ext);
+
+ return 0;
+}
+
+static const struct phy_ops uniphier_u3ssphy_ops = {
+ .init = uniphier_u3ssphy_init,
+ .exit = uniphier_u3ssphy_exit,
+ .owner = THIS_MODULE,
+};
+
+static int uniphier_u3ssphy_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct uniphier_u3ssphy_priv *priv;
+ struct phy_provider *phy_provider;
+ struct resource *res;
+ struct phy *phy;
+ struct clk *clk;
+ struct reset_control *rst;
+ const char *name;
+ int i, ret, nc, nr;
+
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ priv->dev = dev;
+ priv->data = of_device_get_match_data(dev);
+ if (WARN_ON(!priv->data ||
+ priv->data->nparams > MAX_PHY_PARAMS))
+ return -EINVAL;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ priv->base = devm_ioremap_resource(dev, res);
+ if (IS_ERR(priv->base))
+ return PTR_ERR(priv->base);
+
+ for (i = 0; i < MAX_CLKS; i++) {
+ name = priv->data->clock_names[i];
+ if (!name)
+ break;
+ clk = devm_clk_get(dev, name);
+ /* "phy-ext" is optional */
+ if (!strcmp(name, "phy-ext")) {
+ if (PTR_ERR(clk) == -ENOENT)
+ clk = NULL;
+ priv->clk_phy_ext = clk;
+ } else if (!strcmp(name, "phy")) {
+ priv->clk_phy = clk;
+ } else {
+ priv->clk[priv->nclks++] = clk;
+ }
+ if (IS_ERR(clk))
+ return PTR_ERR(clk);
+ }
+
+ for (i = 0; i < MAX_RSTS; i++) {
+ name = priv->data->reset_names[i];
+ if (!name)
+ break;
+ rst = devm_reset_control_get_shared(dev, name);
+ if (IS_ERR(rst))
+ return PTR_ERR(rst);
+
+ if (!strcmp(name, "phy"))
+ priv->rst_phy = rst;
+ else
+ priv->rst[priv->nrsts++] = rst;
+ }
+
+ phy = devm_phy_create(dev, dev->of_node, &uniphier_u3ssphy_ops);
+ if (IS_ERR(phy))
+ return PTR_ERR(phy);
+
+ for (nc = 0; nc < priv->nclks; nc++) {
+ ret = clk_prepare_enable(priv->clk[nc]);
+ if (ret)
+ goto out_clk_disable;
+ }
+
+ for (nr = 0; nr < priv->nrsts; nr++) {
+ ret = reset_control_deassert(priv->rst[nr]);
+ if (ret)
+ goto out_rst_assert;
+ }
+
+ platform_set_drvdata(pdev, priv);
+ phy_set_drvdata(phy, priv);
+ phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
+ if (IS_ERR(phy_provider)) {
+ ret = PTR_ERR(phy_provider);
+ goto out_rst_assert;
+ }
+
+ return 0;
+
+out_rst_assert:
+ while (nr--)
+ reset_control_assert(priv->rst[nr]);
+out_clk_disable:
+ while (nc--)
+ clk_disable_unprepare(priv->clk[nc]);
+
+ return ret;
+}
+
+static int uniphier_u3ssphy_remove(struct platform_device *pdev)
+{
+ struct uniphier_u3ssphy_priv *priv = platform_get_drvdata(pdev);
+ int i;
+
+ for (i = 0; i < priv->nrsts; i++)
+ reset_control_assert(priv->rst[i]);
+ for (i = 0; i < priv->nclks; i++)
+ clk_disable_unprepare(priv->clk[i]);
+
+ return 0;
+}
+
+static const struct uniphier_u3ssphy_soc_data uniphier_pro4_data = {
+ .clock_names = { "gio", "link", },
+ .reset_names = { "gio", "link", },
+ .nparams = 7,
+ .param = {
+ { 0, 0x0f, 0x04 },
+ { 3, 0x0f, 0x08 },
+ { 5, 0x0f, 0x08 },
+ { 6, 0x0f, 0x07 },
+ { 7, 0x0f, 0x02 },
+ { 28, 0x0f, 0x0a },
+ { 30, 0x0f, 0x09 },
+ },
+ .is_legacy = true,
+};
+
+static const struct uniphier_u3ssphy_soc_data uniphier_pxs2_data = {
+ .clock_names = { "link", "phy", },
+ .reset_names = { "link", "phy", },
+ .nparams = 7,
+ .param = {
+ { 7, 0x0f, 0x0a },
+ { 8, 0x0f, 0x03 },
+ { 9, 0x0f, 0x05 },
+ { 11, 0x0f, 0x09 },
+ { 13, 0x60, 0x40 },
+ { 27, 0x07, 0x07 },
+ { 28, 0x03, 0x01 },
+ },
+ .is_legacy = false,
+};
+
+static const struct uniphier_u3ssphy_soc_data uniphier_ld20_data = {
+ .clock_names = { "link", "phy", },
+ .reset_names = { "link", "phy", },
+ .nparams = 3,
+ .param = {
+ { 7, 0x0f, 0x06 },
+ { 13, 0xff, 0xcc },
+ { 26, 0xf0, 0x50 },
+ },
+ .is_legacy = false,
+};
+
+static const struct uniphier_u3ssphy_soc_data uniphier_pxs3_data = {
+ .clock_names = { "link", "phy", "phy-ext", },
+ .reset_names = { "link", "phy", },
+ .nparams = 3,
+ .param = {
+ { 7, 0x0f, 0x06 },
+ { 13, 0xff, 0xcc },
+ { 26, 0xf0, 0x50 },
+ },
+ .is_legacy = false,
+};
+
+static const struct of_device_id uniphier_u3ssphy_match[] = {
+ {
+ .compatible = "socionext,uniphier-pro4-usb3-ssphy",
+ .data = &uniphier_pro4_data,
+ },
+ {
+ .compatible = "socionext,uniphier-pxs2-usb3-ssphy",
+ .data = &uniphier_pxs2_data,
+ },
+ {
+ .compatible = "socionext,uniphier-ld20-usb3-ssphy",
+ .data = &uniphier_ld20_data,
+ },
+ {
+ .compatible = "socionext,uniphier-pxs3-usb3-ssphy",
+ .data = &uniphier_pxs3_data,
+ },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, uniphier_u3ssphy_match);
+
+static struct platform_driver uniphier_u3ssphy_driver = {
+ .probe = uniphier_u3ssphy_probe,
+ .remove = uniphier_u3ssphy_remove,
+ .driver = {
+ .name = "uniphier-usb3-ssphy",
+ .of_match_table = uniphier_u3ssphy_match,
+ },
+};
+
+module_platform_driver(uniphier_u3ssphy_driver);
+
+MODULE_AUTHOR("Kunihiko Hayashi <hayashi.kunihiko@socionext.com>");
+MODULE_DESCRIPTION("UniPhier SS-PHY driver for USB3 controller");
+MODULE_LICENSE("GPL v2");
--
2.7.4