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author | Vivek Gautam <vivek.gautam@codeaurora.org> | 2017-05-11 12:17:42 +0530 |
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committer | Kishon Vijay Abraham I <kishon@ti.com> | 2017-06-01 15:28:33 +0530 |
commit | 0b56e9a7e8358e59b21d8a425e463072bfae523c (patch) | |
tree | a1bd94fb04cd66967e7d2a0f620a37c87da61cf9 /drivers/phy/hisilicon/phy-hix5hd2-sata.c | |
parent | 858edde001e14f070d0fff347fb56c6c79e15312 (diff) | |
download | linux-0b56e9a7e8358e59b21d8a425e463072bfae523c.tar.bz2 |
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>
Diffstat (limited to 'drivers/phy/hisilicon/phy-hix5hd2-sata.c')
-rw-r--r-- | drivers/phy/hisilicon/phy-hix5hd2-sata.c | 191 |
1 files changed, 191 insertions, 0 deletions
diff --git a/drivers/phy/hisilicon/phy-hix5hd2-sata.c b/drivers/phy/hisilicon/phy-hix5hd2-sata.c new file mode 100644 index 000000000000..e5ab3aa78b9d --- /dev/null +++ b/drivers/phy/hisilicon/phy-hix5hd2-sata.c @@ -0,0 +1,191 @@ +/* + * 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/delay.h> +#include <linux/io.h> +#include <linux/mfd/syscon.h> +#include <linux/module.h> +#include <linux/phy/phy.h> +#include <linux/platform_device.h> +#include <linux/regmap.h> + +#define SATA_PHY0_CTLL 0xa0 +#define MPLL_MULTIPLIER_SHIFT 1 +#define MPLL_MULTIPLIER_MASK 0xfe +#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 SPEED_MODE_MASK 0x6f0000 +#define HALF_RATE_SHIFT 16 +#define PHY_CONFIG_SHIFT 18 +#define GEN2_EN_SHIFT 21 +#define SPEED_CTRL BIT(20) + +#define SATA_PORT_PHYCTL1 0x148 +#define AMPLITUDE_MASK 0x3ffffe +#define AMPLITUDE_GEN3 0x68 +#define AMPLITUDE_GEN3_SHIFT 15 +#define AMPLITUDE_GEN2 0x56 +#define AMPLITUDE_GEN2_SHIFT 8 +#define AMPLITUDE_GEN1 0x56 +#define AMPLITUDE_GEN1_SHIFT 1 + +#define SATA_PORT_PHYCTL2 0x14c +#define PREEMPH_MASK 0x3ffff +#define PREEMPH_GEN3 0x20 +#define PREEMPH_GEN3_SHIFT 12 +#define PREEMPH_GEN2 0x15 +#define PREEMPH_GEN2_SHIFT 6 +#define PREEMPH_GEN1 0x5 +#define PREEMPH_GEN1_SHIFT 0 + +struct hix5hd2_priv { + void __iomem *base; + struct regmap *peri_ctrl; +}; + +enum phy_speed_mode { + SPEED_MODE_GEN1 = 0, + SPEED_MODE_GEN2 = 1, + SPEED_MODE_GEN3 = 2, +}; + +static int hix5hd2_sata_phy_init(struct phy *phy) +{ + struct hix5hd2_priv *priv = phy_get_drvdata(phy); + u32 val, data[2]; + int ret; + + if (priv->peri_ctrl) { + ret = of_property_read_u32_array(phy->dev.of_node, + "hisilicon,power-reg", + &data[0], 2); + if (ret) { + dev_err(&phy->dev, "Fail read hisilicon,power-reg\n"); + return ret; + } + + regmap_update_bits(priv->peri_ctrl, data[0], + BIT(data[1]), BIT(data[1])); + } + + /* reset phy */ + val = readl_relaxed(priv->base + SATA_PHY0_CTLL); + val &= ~(MPLL_MULTIPLIER_MASK | REF_USE_PAD); + val |= MPLL_MULTIPLIER_50M << MPLL_MULTIPLIER_SHIFT | + REF_SSP_EN | PHY_RESET; + writel_relaxed(val, priv->base + SATA_PHY0_CTLL); + msleep(20); + val &= ~PHY_RESET; + writel_relaxed(val, priv->base + SATA_PHY0_CTLL); + + val = readl_relaxed(priv->base + SATA_PORT_PHYCTL1); + val &= ~AMPLITUDE_MASK; + val |= AMPLITUDE_GEN3 << AMPLITUDE_GEN3_SHIFT | + AMPLITUDE_GEN2 << AMPLITUDE_GEN2_SHIFT | + AMPLITUDE_GEN1 << AMPLITUDE_GEN1_SHIFT; + writel_relaxed(val, priv->base + SATA_PORT_PHYCTL1); + + val = readl_relaxed(priv->base + SATA_PORT_PHYCTL2); + val &= ~PREEMPH_MASK; + val |= PREEMPH_GEN3 << PREEMPH_GEN3_SHIFT | + PREEMPH_GEN2 << PREEMPH_GEN2_SHIFT | + PREEMPH_GEN1 << PREEMPH_GEN1_SHIFT; + writel_relaxed(val, priv->base + SATA_PORT_PHYCTL2); + + /* ensure PHYCTRL setting takes effect */ + val = readl_relaxed(priv->base + SATA_PORT_PHYCTL); + val &= ~SPEED_MODE_MASK; + val |= SPEED_MODE_GEN1 << HALF_RATE_SHIFT | + SPEED_MODE_GEN1 << PHY_CONFIG_SHIFT | + SPEED_MODE_GEN1 << GEN2_EN_SHIFT | SPEED_CTRL; + writel_relaxed(val, priv->base + SATA_PORT_PHYCTL); + + msleep(20); + val &= ~SPEED_MODE_MASK; + val |= SPEED_MODE_GEN3 << HALF_RATE_SHIFT | + SPEED_MODE_GEN3 << PHY_CONFIG_SHIFT | + SPEED_MODE_GEN3 << GEN2_EN_SHIFT | SPEED_CTRL; + writel_relaxed(val, priv->base + SATA_PORT_PHYCTL); + + val &= ~(SPEED_MODE_MASK | SPEED_CTRL); + val |= SPEED_MODE_GEN2 << HALF_RATE_SHIFT | + SPEED_MODE_GEN2 << PHY_CONFIG_SHIFT | + SPEED_MODE_GEN2 << GEN2_EN_SHIFT; + writel_relaxed(val, priv->base + SATA_PORT_PHYCTL); + + return 0; +} + +static const 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 phy *phy; + struct hix5hd2_priv *priv; + + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) + return -EINVAL; + + 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,peripheral-syscon"); + if (IS_ERR(priv->peri_ctrl)) + priv->peri_ctrl = NULL; + + phy = devm_phy_create(dev, NULL, &hix5hd2_sata_phy_ops); + if (IS_ERR(phy)) { + dev_err(dev, "failed to create PHY\n"); + return PTR_ERR(phy); + } + + phy_set_drvdata(phy, priv); + phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate); + return PTR_ERR_OR_ZERO(phy_provider); +} + +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", + .of_match_table = hix5hd2_sata_phy_of_match, + } +}; +module_platform_driver(hix5hd2_sata_phy_driver); + +MODULE_AUTHOR("Jiancheng Xue <xuejiancheng@huawei.com>"); +MODULE_DESCRIPTION("HISILICON HIX5HD2 SATA PHY driver"); +MODULE_ALIAS("platform:hix5hd2-sata-phy"); +MODULE_LICENSE("GPL v2"); |