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Message-Id: <1402991881-27676-3-git-send-email-zhangfei.gao@linaro.org>
Date: Tue, 17 Jun 2014 15:58:01 +0800
From: Zhangfei Gao <zhangfei.gao@...aro.org>
To: Kishon Vijay Abraham I <kishon@...com>, arnd@...db.de,
mark.rutland@....com, haifeng.yan@...aro.org, jchxue@...il.com,
zhangfei.gao@...aro.org
Cc: linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
devicetree@...r.kernel.org, Jiancheng Xue <xuejiancheng@...wei.com>
Subject: [PATCH 2/2] phy: add hix5hd2-sata-phy driver
From: Jiancheng Xue <xuejiancheng@...wei.com>
Add hix5hd2-sata-phy driver on Hisilicon hix5hd2 soc.
Signed-off-by: Jiancheng Xue <xuejiancheng@...wei.com>
Signed-off-by: Zhangfei Gao <zhangfei.gao@...aro.org>
---
drivers/phy/Kconfig | 8 ++
drivers/phy/Makefile | 1 +
drivers/phy/phy-hix5hd2-sata.c | 192 ++++++++++++++++++++++++++++++++++++++++
3 files changed, 201 insertions(+)
create mode 100644 drivers/phy/phy-hix5hd2-sata.c
diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig
index 16a2f06..782953d 100644
--- a/drivers/phy/Kconfig
+++ b/drivers/phy/Kconfig
@@ -109,6 +109,14 @@ config PHY_EXYNOS5250_SATA
SATA 3.0 Gb/s, SATA 6.0 Gb/s speeds. It supports one SATA host
port to accept one SATA device.
+config PHY_HIX5HD2_SATA
+ tristate "HIX5HD2 SATA PHY Driver"
+ depends on ARCH_HIX5HD2 && OF
+ select GENERIC_PHY
+ select MFD_SYSCON
+ help
+ Support for SATA PHY on Hisilicon hix5hd2 Soc.
+
config PHY_SUN4I_USB
tristate "Allwinner sunxi SoC USB PHY driver"
depends on ARCH_SUNXI && HAS_IOMEM && OF
diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile
index b4f1d57..54f04d0 100644
--- a/drivers/phy/Makefile
+++ b/drivers/phy/Makefile
@@ -12,6 +12,7 @@ obj-$(CONFIG_OMAP_USB2) += phy-omap-usb2.o
obj-$(CONFIG_TI_PIPE3) += phy-ti-pipe3.o
obj-$(CONFIG_TWL4030_USB) += phy-twl4030-usb.o
obj-$(CONFIG_PHY_EXYNOS5250_SATA) += phy-exynos5250-sata.o
+obj-$(CONFIG_PHY_HIX5HD2_SATA) += phy-hix5hd2-sata.o
obj-$(CONFIG_PHY_SUN4I_USB) += phy-sun4i-usb.o
obj-$(CONFIG_PHY_SAMSUNG_USB2) += phy-exynos-usb2.o
phy-exynos-usb2-y += phy-samsung-usb2.o
diff --git a/drivers/phy/phy-hix5hd2-sata.c b/drivers/phy/phy-hix5hd2-sata.c
new file mode 100644
index 0000000..107804b4
--- /dev/null
+++ b/drivers/phy/phy-hix5hd2-sata.c
@@ -0,0 +1,192 @@
+/*
+ * Copyright (c) 2014 Linaro Ltd.
+ * Copyright (c) 2014 Hisilicon Limited.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/module.h>
+#include <linux/mfd/syscon.h>
+#include <linux/regmap.h>
+#include <linux/phy/phy.h>
+#include <linux/io.h>
+#include <linux/platform_device.h>
+#include <linux/delay.h>
+
+#define SATA_PHY0_CTLL 0xa0
+#define MPLL_MULTIPLIER_SHIFT 1
+#define MPLL_MULTIPLIER_WIDTH 7
+#define MPLL_MULTIPLIER_50M 0x3c
+#define MPLL_MULTIPLIER_100M 0x1e
+#define PHY_RESET BIT(0)
+#define REF_SSP_EN BIT(9)
+#define SSC_EN BIT(10)
+#define REF_USE_PAD BIT(23)
+
+#define SATA_PORT_PHYCTL 0x174
+#define HALF_RATE_SHIFT 16
+#define HALF_RATE_WIDTH 2
+#define PHY_CONFIG_SHIFT 18
+#define PHY_CONFIG_WIDTH 2
+#define GEN2_EN_SHIFT 21
+#define GEN2_EN_WIDTH 2
+#define SPEED_CTRL BIT(20)
+
+struct hix5hd2_priv {
+ void __iomem *base;
+ struct regmap *peri_ctrl;
+ struct phy *phy;
+};
+
+enum phy_speed_mode {
+ SPEED_MODE_GEN1 = 0,
+ SPEED_MODE_GEN2 = 1,
+ SPEED_MODE_GEN3 = 2,
+};
+
+static void hix5hd2_sata_phy_write(void __iomem *addr, int shift,
+ int width, int value)
+{
+ int reg, mask;
+
+ mask = BIT(width) - 1;
+ reg = readl_relaxed(addr);
+ reg &= ~(mask << shift);
+ reg |= (value & mask) << shift;
+ writel_relaxed(reg, addr);
+}
+
+static void hix5hd2_sata_phy_setspeed(struct hix5hd2_priv *priv,
+ enum phy_speed_mode mode)
+{
+ hix5hd2_sata_phy_write(priv->base + SATA_PORT_PHYCTL, HALF_RATE_SHIFT,
+ HALF_RATE_WIDTH, mode);
+ hix5hd2_sata_phy_write(priv->base + SATA_PORT_PHYCTL, PHY_CONFIG_SHIFT,
+ PHY_CONFIG_WIDTH, mode);
+ hix5hd2_sata_phy_write(priv->base + SATA_PORT_PHYCTL, GEN2_EN_SHIFT,
+ GEN2_EN_WIDTH, mode);
+}
+
+static int hix5hd2_sata_phy_init(struct phy *phy)
+{
+ struct hix5hd2_priv *priv = phy_get_drvdata(phy);
+ u32 offset, shift, width, value, data[2];
+ const __be32 *paddr;
+ int i, lenp, ret;
+
+ if (priv->peri_ctrl) {
+ ret = of_property_read_u32_array(phy->dev.of_node,
+ "hisilicon,power-reg",
+ &data[0], 2);
+ if (ret)
+ dev_warn(&phy->dev, "Fail read hisilicon,power-reg\n");
+
+ regmap_update_bits(priv->peri_ctrl, data[0],
+ BIT(data[1]), BIT(data[1]));
+ }
+
+ /* reset phy */
+ hix5hd2_sata_phy_write(priv->base + SATA_PHY0_CTLL,
+ MPLL_MULTIPLIER_SHIFT, MPLL_MULTIPLIER_WIDTH,
+ MPLL_MULTIPLIER_50M);
+ value = readl_relaxed(priv->base + SATA_PHY0_CTLL);
+ value &= ~(REF_USE_PAD);
+ value |= (REF_SSP_EN | PHY_RESET);
+ writel_relaxed(value, priv->base + SATA_PHY0_CTLL);
+ msleep(20);
+ value &= ~(PHY_RESET);
+ writel_relaxed(value, priv->base + SATA_PHY0_CTLL);
+
+ paddr = of_get_property(phy->dev.of_node, "hisilicon,reg-init", &lenp);
+ if (!paddr || lenp < 4 * sizeof(*paddr))
+ return 0;
+
+ lenp /= sizeof(*paddr);
+ for (i = 0; i < lenp - 3; i += 4) {
+ offset = be32_to_cpup(paddr + i);
+ shift = be32_to_cpup(paddr + i + 1);
+ width = be32_to_cpup(paddr + i + 2);
+ value = be32_to_cpup(paddr + i + 3);
+ hix5hd2_sata_phy_write(priv->base + offset,
+ shift, width, value);
+ }
+
+ /* ensure reg-init takes effect */
+ value = readl_relaxed(priv->base + SATA_PORT_PHYCTL);
+ value |= SPEED_CTRL;
+ writel_relaxed(value, priv->base + SATA_PORT_PHYCTL);
+ hix5hd2_sata_phy_setspeed(priv, SPEED_MODE_GEN1);
+ msleep(20);
+ hix5hd2_sata_phy_setspeed(priv, SPEED_MODE_GEN3);
+ value = readl_relaxed(priv->base + SATA_PORT_PHYCTL);
+ value &= ~(SPEED_CTRL);
+ writel_relaxed(value, priv->base + SATA_PORT_PHYCTL);
+ hix5hd2_sata_phy_setspeed(priv, SPEED_MODE_GEN2);
+
+ return 0;
+}
+
+static struct phy_ops hix5hd2_sata_phy_ops = {
+ .init = hix5hd2_sata_phy_init,
+ .owner = THIS_MODULE,
+};
+
+static int hix5hd2_sata_phy_probe(struct platform_device *pdev)
+{
+ struct phy_provider *phy_provider;
+ struct device *dev = &pdev->dev;
+ struct resource *res;
+ struct hix5hd2_priv *priv;
+
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ priv->base = devm_ioremap(dev, res->start, resource_size(res));
+ if (!priv->base)
+ return -ENOMEM;
+
+ priv->peri_ctrl = syscon_regmap_lookup_by_phandle(dev->of_node,
+ "hisilicon,peri-syscon");
+ if (IS_ERR(priv->peri_ctrl))
+ priv->peri_ctrl = NULL;
+
+ priv->phy = devm_phy_create(dev, &hix5hd2_sata_phy_ops, NULL);
+ if (IS_ERR(priv->phy)) {
+ dev_err(dev, "failed to create PHY\n");
+ return PTR_ERR(priv->phy);
+ }
+
+ phy_set_drvdata(priv->phy, priv);
+
+ phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
+ if (IS_ERR(phy_provider))
+ return PTR_ERR(phy_provider);
+
+ return 0;
+}
+
+static const struct of_device_id hix5hd2_sata_phy_of_match[] = {
+ {.compatible = "hisilicon,hix5hd2-sata-phy",},
+ { },
+};
+MODULE_DEVICE_TABLE(of, hix5hd2_sata_phy_of_match);
+
+static struct platform_driver hix5hd2_sata_phy_driver = {
+ .probe = hix5hd2_sata_phy_probe,
+ .driver = {
+ .name = "hix5hd2-sata-phy",
+ .owner = THIS_MODULE,
+ .of_match_table = hix5hd2_sata_phy_of_match,
+ }
+};
+module_platform_driver(hix5hd2_sata_phy_driver);
+
+MODULE_AUTHOR("Jiancheng Xue <xuejiancheng@...wei.com>");
+MODULE_DESCRIPTION("HISILICON HIX5HD2 SATA PHY driver");
+MODULE_ALIAS("platform:hix5hd2-sata-phy");
+MODULE_LICENSE("GPL v2");
--
1.7.9.5
--
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