Add a PHY driver for uses with AHCI based SATA controller driver on the APQ8064 family of SoCs.
This patch is a forward port plus separating PHY code of SATA driver from Qualcomm's v3.4 andriod kernel. Tested on IFC6410 board. CC: Sujit Reddy Thumma <[email protected]> Signed-off-by: Srinivas Kandagatla <[email protected]> --- drivers/phy/Kconfig | 7 + drivers/phy/Makefile | 1 + drivers/phy/phy-qcom-apq8064-sata.c | 358 ++++++++++++++++++++++++++++++++++++ 3 files changed, 366 insertions(+) create mode 100644 drivers/phy/phy-qcom-apq8064-sata.c diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig index b7b6bce..39083c7 100644 --- a/drivers/phy/Kconfig +++ b/drivers/phy/Kconfig @@ -178,6 +178,13 @@ config PHY_XGENE help This option enables support for APM X-Gene SoC multi-purpose PHY. +config PHY_QCOM_APQ8064_SATA + tristate "Qualcomm APQ8064 SATA SerDes/PHY driver" + depends on ARCH_QCOM + depends on HAS_IOMEM + depends on OF + select GENERIC_PHY + config PHY_QCOM_IPQ806X_SATA tristate "Qualcomm IPQ806x SATA SerDes/PHY driver" depends on ARCH_QCOM diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile index d950317..8782088 100644 --- a/drivers/phy/Makefile +++ b/drivers/phy/Makefile @@ -20,4 +20,5 @@ phy-exynos-usb2-$(CONFIG_PHY_EXYNOS4X12_USB2) += phy-exynos4x12-usb2.o phy-exynos-usb2-$(CONFIG_PHY_EXYNOS5250_USB2) += phy-exynos5250-usb2.o obj-$(CONFIG_PHY_EXYNOS5_USBDRD) += phy-exynos5-usbdrd.o obj-$(CONFIG_PHY_XGENE) += phy-xgene.o +obj-$(CONFIG_PHY_QCOM_APQ8064_SATA) += phy-qcom-apq8064-sata.o obj-$(CONFIG_PHY_QCOM_IPQ806X_SATA) += phy-qcom-ipq806x-sata.o diff --git a/drivers/phy/phy-qcom-apq8064-sata.c b/drivers/phy/phy-qcom-apq8064-sata.c new file mode 100644 index 0000000..e9e59e2 --- /dev/null +++ b/drivers/phy/phy-qcom-apq8064-sata.c @@ -0,0 +1,358 @@ +/* + * 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_POSTDIV1_CFG 0x004 +#define UNIPHY_PLL_CHGPUMP_CFG 0x008 +#define UNIPHY_PLL_VCOLPF_CFG 0x00C +#define UNIPHY_PLL_VREG_CFG 0x010 +#define UNIPHY_PLL_PWRGEN_CFG 0x014 +#define UNIPHY_PLL_DMUX_CFG 0x018 +#define UNIPHY_PLL_AMUX_CFG 0x01C +#define UNIPHY_PLL_GLB_CFG 0x020 +#define UNIPHY_PLL_POSTDIV2_CFG 0x024 +#define UNIPHY_PLL_POSTDIV3_CFG 0x028 +#define UNIPHY_PLL_LPFR_CFG 0x02C +#define UNIPHY_PLL_LPFC1_CFG 0x030 +#define UNIPHY_PLL_LPFC2_CFG 0x034 +#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_TEST_CFG 0x068 +#define UNIPHY_PLL_CAL_CFG0 0x06C +#define UNIPHY_PLL_CAL_CFG1 0x070 +#define UNIPHY_PLL_CAL_CFG2 0x074 +#define UNIPHY_PLL_CAL_CFG3 0x078 +#define UNIPHY_PLL_CAL_CFG4 0x07C +#define UNIPHY_PLL_CAL_CFG5 0x080 +#define UNIPHY_PLL_CAL_CFG6 0x084 +#define UNIPHY_PLL_CAL_CFG7 0x088 +#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_EFUSE_CFG 0x09C +#define UNIPHY_PLL_DEBUG_BUS_SEL 0x0A0 +#define UNIPHY_PLL_CTRL_42 0x0A4 +#define UNIPHY_PLL_CTRL_43 0x0A8 +#define UNIPHY_PLL_CTRL_44 0x0AC +#define UNIPHY_PLL_CTRL_45 0x0B0 +#define UNIPHY_PLL_CTRL_46 0x0B4 +#define UNIPHY_PLL_CTRL_47 0x0B8 +#define UNIPHY_PLL_CTRL_48 0x0BC +#define UNIPHY_PLL_STATUS 0x0C0 +#define UNIPHY_PLL_DEBUG_BUS0 0x0C4 +#define UNIPHY_PLL_DEBUG_BUS1 0x0C8 +#define UNIPHY_PLL_DEBUG_BUS2 0x0CC +#define UNIPHY_PLL_DEBUG_BUS3 0x0D0 +#define UNIPHY_PLL_CTRL_54 0x0D4 + +#define SATA_PHY_SER_CTRL 0x100 +#define SATA_PHY_TX_DRIV_CTRL0 0x104 +#define SATA_PHY_TX_DRIV_CTRL1 0x108 +#define SATA_PHY_TX_DRIV_CTRL2 0x10C +#define SATA_PHY_TX_DRIV_CTRL3 0x110 +#define SATA_PHY_TX_IMCAL0 0x11C +#define SATA_PHY_TX_IMCAL1 0x120 +#define SATA_PHY_TX_IMCAL2 0x124 +#define SATA_PHY_RX_IMCAL0 0x128 +#define SATA_PHY_RX_IMCAL1 0x12C +#define SATA_PHY_RX_IMCAL2 0x130 +#define SATA_PHY_RX_TERM 0x134 +#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_CDR_CTRL4 0x158 +#define SATA_PHY_FA_LOAD0 0x15C +#define SATA_PHY_FA_LOAD1 0x160 +#define SATA_PHY_PI_CTRL0 0x168 +#define SATA_PHY_PI_CTRL1 0x16C +#define SATA_PHY_AD_TPA_CTRL 0x178 +#define SATA_PHY_REFCLK_CTRL 0x17C +#define SATA_PHY_POW_DWN_CTRL0 0x180 +#define SATA_PHY_POW_DWN_CTRL1 0x184 +#define SATA_PHY_TX_DATA_CTRL 0x188 +#define SATA_PHY_BIST_GEN0 0x18C +#define SATA_PHY_BIST_GEN1 0x190 +#define SATA_PHY_BIST_GEN2 0x194 +#define SATA_PHY_BIST_GEN3 0x198 +#define SATA_PHY_LBK_CTRL 0x19C +#define SATA_PHY_TEST_DEBUG_CTRL 0x1A0 +#define SATA_PHY_ALIGNP 0x1A4 +#define SATA_PHY_PRBS_CFG0 0x1A8 +#define SATA_PHY_PRBS_CFG1 0x1AC +#define SATA_PHY_PRBS_CFG2 0x1B0 +#define SATA_PHY_PRBS_CFG3 0x1B4 +#define SATA_PHY_CHAN_COMP_CHK_CNT 0x1B8 +#define SATA_PHY_RESET_CTRL 0x1BC +#define SATA_PHY_RX_CLR 0x1C0 +#define SATA_PHY_RX_EBUF_CTRL 0x1C4 +#define SATA_PHY_ID0 0x1C8 +#define SATA_PHY_ID1 0x1CC +#define SATA_PHY_ID2 0x1D0 +#define SATA_PHY_ID3 0x1D4 +#define SATA_PHY_RX_CHK_ERR_CNT0 0x1D8 +#define SATA_PHY_RX_CHK_ERR_CNT1 0x1DC +#define SATA_PHY_RX_CHK_STAT 0x1E0 +#define SATA_PHY_TX_IMCAL_STAT 0x1E4 +#define SATA_PHY_RX_IMCAL_STAT 0x1E8 +#define SATA_PHY_RX_EBUF_STAT 0x1EC +#define SATA_PHY_DEBUG_BUS_STAT0 0x1F0 +#define SATA_PHY_DEBUG_BUS_STAT1 0x1F4 +#define SATA_PHY_DEBUG_BUS_STAT2 0x1F8 +#define SATA_PHY_DEBUG_BUS_STAT3 0x1FC + +#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 + +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); + u32 val; + + do { + cpu_relax(); + val = readl_relaxed(addr); + if (val & mask) + break; + } while (!time_after(jiffies, timeout)); + + return (val & 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 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, &qcom_apq8064_sata_phy_ops, NULL); + 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); + + 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", + .owner = THIS_MODULE, + .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"); -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
