phy: Group vendor specific phy drivers

Adding vendor specific directories in phy to group
phy drivers under their respective vendor umbrella.

Also updated the MAINTAINERS file to reflect the correct
directory structure for phy drivers.

Signed-off-by: Vivek Gautam <vivek.gautam@codeaurora.org>
Acked-by: Heiko Stuebner <heiko@sntech.de>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Krzysztof Kozlowski <krzk@kernel.org>
Acked-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
Cc: Kishon Vijay Abraham I <kishon@ti.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: Heiko Stuebner <heiko@sntech.de>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Maxime Ripard <maxime.ripard@free-electrons.com>
Cc: Chen-Yu Tsai <wens@csie.org>
Cc: Sylwester Nawrocki <s.nawrocki@samsung.com>
Cc: Krzysztof Kozlowski <krzk@kernel.org>
Cc: Jaehoon Chung <jh80.chung@samsung.com>
Cc: Stephen Boyd <stephen.boyd@linaro.org>
Cc: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-arm-msm@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: linux-omap@vger.kernel.org
Cc: linux-renesas-soc@vger.kernel.org
Cc: linux-rockchip@lists.infradead.org
Cc: linux-samsung-soc@vger.kernel.org
Cc: linux-usb@vger.kernel.org
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>

1 files changed, 209 insertions, 0 deletions

diff --git a/drivers/phy/qualcomm/phy-qcom-ipq806x-sata.c b/drivers/phy/qualcomm/phy-qcom-ipq806x-sata.c
new file mode 100644
index 000000000000..0ad127cc9298
--- /dev/null
+++ b/drivers/phy/qualcomm/phy-qcom-ipq806x-sata.c
@@ -0,0 +1,209 @@
+/*
+ * Copyright (c) 2014, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/time.h>
+#include <linux/delay.h>
+#include <linux/clk.h>
+#include <linux/slab.h>
+#include <linux/platform_device.h>
+#include <linux/phy/phy.h>
+
+struct qcom_ipq806x_sata_phy {
+	void __iomem *mmio;
+	struct clk *cfg_clk;
+	struct device *dev;
+};
+
+#define __set(v, a, b)	(((v) << (b)) & GENMASK(a, b))
+
+#define SATA_PHY_P0_PARAM0		0x200
+#define SATA_PHY_P0_PARAM0_P0_TX_PREEMPH_GEN3(x)	__set(x, 17, 12)
+#define SATA_PHY_P0_PARAM0_P0_TX_PREEMPH_GEN3_MASK	GENMASK(17, 12)
+#define SATA_PHY_P0_PARAM0_P0_TX_PREEMPH_GEN2(x)	__set(x, 11, 6)
+#define SATA_PHY_P0_PARAM0_P0_TX_PREEMPH_GEN2_MASK	GENMASK(11, 6)
+#define SATA_PHY_P0_PARAM0_P0_TX_PREEMPH_GEN1(x)	__set(x, 5, 0)
+#define SATA_PHY_P0_PARAM0_P0_TX_PREEMPH_GEN1_MASK	GENMASK(5, 0)
+
+#define SATA_PHY_P0_PARAM1		0x204
+#define SATA_PHY_P0_PARAM1_RESERVED_BITS31_21(x)	__set(x, 31, 21)
+#define SATA_PHY_P0_PARAM1_P0_TX_AMPLITUDE_GEN3(x)	__set(x, 20, 14)
+#define SATA_PHY_P0_PARAM1_P0_TX_AMPLITUDE_GEN3_MASK	GENMASK(20, 14)
+#define SATA_PHY_P0_PARAM1_P0_TX_AMPLITUDE_GEN2(x)	__set(x, 13, 7)
+#define SATA_PHY_P0_PARAM1_P0_TX_AMPLITUDE_GEN2_MASK	GENMASK(13, 7)
+#define SATA_PHY_P0_PARAM1_P0_TX_AMPLITUDE_GEN1(x)	__set(x, 6, 0)
+#define SATA_PHY_P0_PARAM1_P0_TX_AMPLITUDE_GEN1_MASK	GENMASK(6, 0)
+
+#define SATA_PHY_P0_PARAM2		0x208
+#define SATA_PHY_P0_PARAM2_RX_EQ(x)	__set(x, 20, 18)
+#define SATA_PHY_P0_PARAM2_RX_EQ_MASK	GENMASK(20, 18)
+
+#define SATA_PHY_P0_PARAM3		0x20C
+#define SATA_PHY_SSC_EN			0x8
+#define SATA_PHY_P0_PARAM4		0x210
+#define SATA_PHY_REF_SSP_EN		0x2
+#define SATA_PHY_RESET			0x1
+
+static int qcom_ipq806x_sata_phy_init(struct phy *generic_phy)
+{
+	struct qcom_ipq806x_sata_phy *phy = phy_get_drvdata(generic_phy);
+	u32 reg;
+
+	/* Setting SSC_EN to 1 */
+	reg = readl_relaxed(phy->mmio + SATA_PHY_P0_PARAM3);
+	reg = reg | SATA_PHY_SSC_EN;
+	writel_relaxed(reg, phy->mmio + SATA_PHY_P0_PARAM3);
+
+	reg = readl_relaxed(phy->mmio + SATA_PHY_P0_PARAM0) &
+			~(SATA_PHY_P0_PARAM0_P0_TX_PREEMPH_GEN3_MASK |
+			  SATA_PHY_P0_PARAM0_P0_TX_PREEMPH_GEN2_MASK |
+			  SATA_PHY_P0_PARAM0_P0_TX_PREEMPH_GEN1_MASK);
+	reg |= SATA_PHY_P0_PARAM0_P0_TX_PREEMPH_GEN3(0xf);
+	writel_relaxed(reg, phy->mmio + SATA_PHY_P0_PARAM0);
+
+	reg = readl_relaxed(phy->mmio + SATA_PHY_P0_PARAM1) &
+			~(SATA_PHY_P0_PARAM1_P0_TX_AMPLITUDE_GEN3_MASK |
+			  SATA_PHY_P0_PARAM1_P0_TX_AMPLITUDE_GEN2_MASK |
+			  SATA_PHY_P0_PARAM1_P0_TX_AMPLITUDE_GEN1_MASK);
+	reg |= SATA_PHY_P0_PARAM1_P0_TX_AMPLITUDE_GEN3(0x55) |
+		SATA_PHY_P0_PARAM1_P0_TX_AMPLITUDE_GEN2(0x55) |
+		SATA_PHY_P0_PARAM1_P0_TX_AMPLITUDE_GEN1(0x55);
+	writel_relaxed(reg, phy->mmio + SATA_PHY_P0_PARAM1);
+
+	reg = readl_relaxed(phy->mmio + SATA_PHY_P0_PARAM2) &
+		~SATA_PHY_P0_PARAM2_RX_EQ_MASK;
+	reg |= SATA_PHY_P0_PARAM2_RX_EQ(0x3);
+	writel_relaxed(reg, phy->mmio + SATA_PHY_P0_PARAM2);
+
+	/* Setting PHY_RESET to 1 */
+	reg = readl_relaxed(phy->mmio + SATA_PHY_P0_PARAM4);
+	reg = reg | SATA_PHY_RESET;
+	writel_relaxed(reg, phy->mmio + SATA_PHY_P0_PARAM4);
+
+	/* Setting REF_SSP_EN to 1 */
+	reg = readl_relaxed(phy->mmio + SATA_PHY_P0_PARAM4);
+	reg = reg | SATA_PHY_REF_SSP_EN | SATA_PHY_RESET;
+	writel_relaxed(reg, phy->mmio + SATA_PHY_P0_PARAM4);
+
+	/* make sure all changes complete before we let the PHY out of reset */
+	mb();
+
+	/* sleep for max. 50us more to combine processor wakeups */
+	usleep_range(20, 20 + 50);
+
+	/* Clearing PHY_RESET to 0 */
+	reg = readl_relaxed(phy->mmio + SATA_PHY_P0_PARAM4);
+	reg = reg & ~SATA_PHY_RESET;
+	writel_relaxed(reg, phy->mmio + SATA_PHY_P0_PARAM4);
+
+	return 0;
+}
+
+static int qcom_ipq806x_sata_phy_exit(struct phy *generic_phy)
+{
+	struct qcom_ipq806x_sata_phy *phy = phy_get_drvdata(generic_phy);
+	u32 reg;
+
+	/* Setting PHY_RESET to 1 */
+	reg = readl_relaxed(phy->mmio + SATA_PHY_P0_PARAM4);
+	reg = reg | SATA_PHY_RESET;
+	writel_relaxed(reg, phy->mmio + SATA_PHY_P0_PARAM4);
+
+	return 0;
+}
+
+static const struct phy_ops qcom_ipq806x_sata_phy_ops = {
+	.init		= qcom_ipq806x_sata_phy_init,
+	.exit		= qcom_ipq806x_sata_phy_exit,
+	.owner		= THIS_MODULE,
+};
+
+static int qcom_ipq806x_sata_phy_probe(struct platform_device *pdev)
+{
+	struct qcom_ipq806x_sata_phy *phy;
+	struct device *dev = &pdev->dev;
+	struct resource *res;
+	struct phy_provider *phy_provider;
+	struct phy *generic_phy;
+	int ret;
+
+	phy = devm_kzalloc(dev, sizeof(*phy), GFP_KERNEL);
+	if (!phy)
+		return -ENOMEM;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	phy->mmio = devm_ioremap_resource(dev, res);
+	if (IS_ERR(phy->mmio))
+		return PTR_ERR(phy->mmio);
+
+	generic_phy = devm_phy_create(dev, NULL, &qcom_ipq806x_sata_phy_ops);
+	if (IS_ERR(generic_phy)) {
+		dev_err(dev, "%s: failed to create phy\n", __func__);
+		return PTR_ERR(generic_phy);
+	}
+
+	phy->dev = dev;
+	phy_set_drvdata(generic_phy, phy);
+	platform_set_drvdata(pdev, phy);
+
+	phy->cfg_clk = devm_clk_get(dev, "cfg");
+	if (IS_ERR(phy->cfg_clk)) {
+		dev_err(dev, "Failed to get sata cfg clock\n");
+		return PTR_ERR(phy->cfg_clk);
+	}
+
+	ret = clk_prepare_enable(phy->cfg_clk);
+	if (ret)
+		return ret;
+
+	phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
+	if (IS_ERR(phy_provider)) {
+		clk_disable_unprepare(phy->cfg_clk);
+		dev_err(dev, "%s: failed to register phy\n", __func__);
+		return PTR_ERR(phy_provider);
+	}
+
+	return 0;
+}
+
+static int qcom_ipq806x_sata_phy_remove(struct platform_device *pdev)
+{
+	struct qcom_ipq806x_sata_phy *phy = platform_get_drvdata(pdev);
+
+	clk_disable_unprepare(phy->cfg_clk);
+
+	return 0;
+}
+
+static const struct of_device_id qcom_ipq806x_sata_phy_of_match[] = {
+	{ .compatible = "qcom,ipq806x-sata-phy" },
+	{ },
+};
+MODULE_DEVICE_TABLE(of, qcom_ipq806x_sata_phy_of_match);
+
+static struct platform_driver qcom_ipq806x_sata_phy_driver = {
+	.probe	= qcom_ipq806x_sata_phy_probe,
+	.remove	= qcom_ipq806x_sata_phy_remove,
+	.driver = {
+		.name	= "qcom-ipq806x-sata-phy",
+		.of_match_table	= qcom_ipq806x_sata_phy_of_match,
+	}
+};
+module_platform_driver(qcom_ipq806x_sata_phy_driver);
+
+MODULE_DESCRIPTION("QCOM IPQ806x SATA PHY driver");
+MODULE_LICENSE("GPL v2");