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, 287 insertions, 0 deletions

diff --git a/drivers/phy/qualcomm/phy-qcom-apq8064-sata.c b/drivers/phy/qualcomm/phy-qcom-apq8064-sata.c
new file mode 100644
index 000000000000..69ce2afac015
--- /dev/null
+++ b/drivers/phy/qualcomm/phy-qcom-apq8064-sata.c
@@ -0,0 +1,287 @@
+/*
+ * 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/time.h>
+#include <linux/delay.h>
+#include <linux/clk.h>
+#include <linux/slab.h>
+#include <linux/platform_device.h>
+#include <linux/phy/phy.h>
+
+/* PHY registers */
+#define UNIPHY_PLL_REFCLK_CFG		0x000
+#define UNIPHY_PLL_PWRGEN_CFG		0x014
+#define UNIPHY_PLL_GLB_CFG		0x020
+#define UNIPHY_PLL_SDM_CFG0		0x038
+#define UNIPHY_PLL_SDM_CFG1		0x03C
+#define UNIPHY_PLL_SDM_CFG2		0x040
+#define UNIPHY_PLL_SDM_CFG3		0x044
+#define UNIPHY_PLL_SDM_CFG4		0x048
+#define UNIPHY_PLL_SSC_CFG0		0x04C
+#define UNIPHY_PLL_SSC_CFG1		0x050
+#define UNIPHY_PLL_SSC_CFG2		0x054
+#define UNIPHY_PLL_SSC_CFG3		0x058
+#define UNIPHY_PLL_LKDET_CFG0		0x05C
+#define UNIPHY_PLL_LKDET_CFG1		0x060
+#define UNIPHY_PLL_LKDET_CFG2		0x064
+#define UNIPHY_PLL_CAL_CFG0		0x06C
+#define UNIPHY_PLL_CAL_CFG8		0x08C
+#define UNIPHY_PLL_CAL_CFG9		0x090
+#define UNIPHY_PLL_CAL_CFG10		0x094
+#define UNIPHY_PLL_CAL_CFG11		0x098
+#define UNIPHY_PLL_STATUS		0x0C0
+
+#define SATA_PHY_SER_CTRL		0x100
+#define SATA_PHY_TX_DRIV_CTRL0		0x104
+#define SATA_PHY_TX_DRIV_CTRL1		0x108
+#define SATA_PHY_TX_IMCAL0		0x11C
+#define SATA_PHY_TX_IMCAL2		0x124
+#define SATA_PHY_RX_IMCAL0		0x128
+#define SATA_PHY_EQUAL			0x13C
+#define SATA_PHY_OOB_TERM		0x144
+#define SATA_PHY_CDR_CTRL0		0x148
+#define SATA_PHY_CDR_CTRL1		0x14C
+#define SATA_PHY_CDR_CTRL2		0x150
+#define SATA_PHY_CDR_CTRL3		0x154
+#define SATA_PHY_PI_CTRL0		0x168
+#define SATA_PHY_POW_DWN_CTRL0		0x180
+#define SATA_PHY_POW_DWN_CTRL1		0x184
+#define SATA_PHY_TX_DATA_CTRL		0x188
+#define SATA_PHY_ALIGNP			0x1A4
+#define SATA_PHY_TX_IMCAL_STAT		0x1E4
+#define SATA_PHY_RX_IMCAL_STAT		0x1E8
+
+#define UNIPHY_PLL_LOCK		BIT(0)
+#define SATA_PHY_TX_CAL		BIT(0)
+#define SATA_PHY_RX_CAL		BIT(0)
+
+/* default timeout set to 1 sec */
+#define TIMEOUT_MS		10000
+#define DELAY_INTERVAL_US	100
+
+struct qcom_apq8064_sata_phy {
+	void __iomem *mmio;
+	struct clk *cfg_clk;
+	struct device *dev;
+};
+
+/* Helper function to do poll and timeout */
+static int read_poll_timeout(void __iomem *addr, u32 mask)
+{
+	unsigned long timeout = jiffies + msecs_to_jiffies(TIMEOUT_MS);
+
+	do {
+		if (readl_relaxed(addr) & mask)
+			return 0;
+
+		 usleep_range(DELAY_INTERVAL_US, DELAY_INTERVAL_US + 50);
+	} while (!time_after(jiffies, timeout));
+
+	return (readl_relaxed(addr) & mask) ? 0 : -ETIMEDOUT;
+}
+
+static int qcom_apq8064_sata_phy_init(struct phy *generic_phy)
+{
+	struct qcom_apq8064_sata_phy *phy = phy_get_drvdata(generic_phy);
+	void __iomem *base = phy->mmio;
+	int ret = 0;
+
+	/* SATA phy initialization */
+	writel_relaxed(0x01, base + SATA_PHY_SER_CTRL);
+	writel_relaxed(0xB1, base + SATA_PHY_POW_DWN_CTRL0);
+	/* Make sure the power down happens before power up */
+	mb();
+	usleep_range(10, 60);
+
+	writel_relaxed(0x01, base + SATA_PHY_POW_DWN_CTRL0);
+	writel_relaxed(0x3E, base + SATA_PHY_POW_DWN_CTRL1);
+	writel_relaxed(0x01, base + SATA_PHY_RX_IMCAL0);
+	writel_relaxed(0x01, base + SATA_PHY_TX_IMCAL0);
+	writel_relaxed(0x02, base + SATA_PHY_TX_IMCAL2);
+
+	/* Write UNIPHYPLL registers to configure PLL */
+	writel_relaxed(0x04, base + UNIPHY_PLL_REFCLK_CFG);
+	writel_relaxed(0x00, base + UNIPHY_PLL_PWRGEN_CFG);
+
+	writel_relaxed(0x0A, base + UNIPHY_PLL_CAL_CFG0);
+	writel_relaxed(0xF3, base + UNIPHY_PLL_CAL_CFG8);
+	writel_relaxed(0x01, base + UNIPHY_PLL_CAL_CFG9);
+	writel_relaxed(0xED, base + UNIPHY_PLL_CAL_CFG10);
+	writel_relaxed(0x02, base + UNIPHY_PLL_CAL_CFG11);
+
+	writel_relaxed(0x36, base + UNIPHY_PLL_SDM_CFG0);
+	writel_relaxed(0x0D, base + UNIPHY_PLL_SDM_CFG1);
+	writel_relaxed(0xA3, base + UNIPHY_PLL_SDM_CFG2);
+	writel_relaxed(0xF0, base + UNIPHY_PLL_SDM_CFG3);
+	writel_relaxed(0x00, base + UNIPHY_PLL_SDM_CFG4);
+
+	writel_relaxed(0x19, base + UNIPHY_PLL_SSC_CFG0);
+	writel_relaxed(0xE1, base + UNIPHY_PLL_SSC_CFG1);
+	writel_relaxed(0x00, base + UNIPHY_PLL_SSC_CFG2);
+	writel_relaxed(0x11, base + UNIPHY_PLL_SSC_CFG3);
+
+	writel_relaxed(0x04, base + UNIPHY_PLL_LKDET_CFG0);
+	writel_relaxed(0xFF, base + UNIPHY_PLL_LKDET_CFG1);
+
+	writel_relaxed(0x02, base + UNIPHY_PLL_GLB_CFG);
+	/* make sure global config LDO power down happens before power up */
+	mb();
+
+	writel_relaxed(0x03, base + UNIPHY_PLL_GLB_CFG);
+	writel_relaxed(0x05, base + UNIPHY_PLL_LKDET_CFG2);
+
+	/* PLL Lock wait */
+	ret = read_poll_timeout(base + UNIPHY_PLL_STATUS, UNIPHY_PLL_LOCK);
+	if (ret) {
+		dev_err(phy->dev, "poll timeout UNIPHY_PLL_STATUS\n");
+		return ret;
+	}
+
+	/* TX Calibration */
+	ret = read_poll_timeout(base + SATA_PHY_TX_IMCAL_STAT, SATA_PHY_TX_CAL);
+	if (ret) {
+		dev_err(phy->dev, "poll timeout SATA_PHY_TX_IMCAL_STAT\n");
+		return ret;
+	}
+
+	/* RX Calibration */
+	ret = read_poll_timeout(base + SATA_PHY_RX_IMCAL_STAT, SATA_PHY_RX_CAL);
+	if (ret) {
+		dev_err(phy->dev, "poll timeout SATA_PHY_RX_IMCAL_STAT\n");
+		return ret;
+	}
+
+	/* SATA phy calibrated succesfully, power up to functional mode */
+	writel_relaxed(0x3E, base + SATA_PHY_POW_DWN_CTRL1);
+	writel_relaxed(0x01, base + SATA_PHY_RX_IMCAL0);
+	writel_relaxed(0x01, base + SATA_PHY_TX_IMCAL0);
+
+	writel_relaxed(0x00, base + SATA_PHY_POW_DWN_CTRL1);
+	writel_relaxed(0x59, base + SATA_PHY_CDR_CTRL0);
+	writel_relaxed(0x04, base + SATA_PHY_CDR_CTRL1);
+	writel_relaxed(0x00, base + SATA_PHY_CDR_CTRL2);
+	writel_relaxed(0x00, base + SATA_PHY_PI_CTRL0);
+	writel_relaxed(0x00, base + SATA_PHY_CDR_CTRL3);
+	writel_relaxed(0x01, base + SATA_PHY_POW_DWN_CTRL0);
+
+	writel_relaxed(0x11, base + SATA_PHY_TX_DATA_CTRL);
+	writel_relaxed(0x43, base + SATA_PHY_ALIGNP);
+	writel_relaxed(0x04, base + SATA_PHY_OOB_TERM);
+
+	writel_relaxed(0x01, base + SATA_PHY_EQUAL);
+	writel_relaxed(0x09, base + SATA_PHY_TX_DRIV_CTRL0);
+	writel_relaxed(0x09, base + SATA_PHY_TX_DRIV_CTRL1);
+
+	return 0;
+}
+
+static int qcom_apq8064_sata_phy_exit(struct phy *generic_phy)
+{
+	struct qcom_apq8064_sata_phy *phy = phy_get_drvdata(generic_phy);
+	void __iomem *base = phy->mmio;
+
+	/* Power down PHY */
+	writel_relaxed(0xF8, base + SATA_PHY_POW_DWN_CTRL0);
+	writel_relaxed(0xFE, base + SATA_PHY_POW_DWN_CTRL1);
+
+	/* Power down PLL block */
+	writel_relaxed(0x00, base + UNIPHY_PLL_GLB_CFG);
+
+	return 0;
+}
+
+static const struct phy_ops qcom_apq8064_sata_phy_ops = {
+	.init		= qcom_apq8064_sata_phy_init,
+	.exit		= qcom_apq8064_sata_phy_exit,
+	.owner		= THIS_MODULE,
+};
+
+static int qcom_apq8064_sata_phy_probe(struct platform_device *pdev)
+{
+	struct qcom_apq8064_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_apq8064_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_apq8064_sata_phy_remove(struct platform_device *pdev)
+{
+	struct qcom_apq8064_sata_phy *phy = platform_get_drvdata(pdev);
+
+	clk_disable_unprepare(phy->cfg_clk);
+
+	return 0;
+}
+
+static const struct of_device_id qcom_apq8064_sata_phy_of_match[] = {
+	{ .compatible = "qcom,apq8064-sata-phy" },
+	{ },
+};
+MODULE_DEVICE_TABLE(of, qcom_apq8064_sata_phy_of_match);
+
+static struct platform_driver qcom_apq8064_sata_phy_driver = {
+	.probe	= qcom_apq8064_sata_phy_probe,
+	.remove	= qcom_apq8064_sata_phy_remove,
+	.driver = {
+		.name	= "qcom-apq8064-sata-phy",
+		.of_match_table	= qcom_apq8064_sata_phy_of_match,
+	}
+};
+module_platform_driver(qcom_apq8064_sata_phy_driver);
+
+MODULE_DESCRIPTION("QCOM apq8064 SATA PHY driver");
+MODULE_LICENSE("GPL v2");