On Wednesday 09 July 2014 03:06 PM, Srinivas Kandagatla wrote: > Hi Kishon, > > Could you please consider this for v3.17? > sure.. please send the dt binding docs along with this patch. Cheers Kishon > > Thanks, > srini > > On 23/06/14 19:00, Srinivas Kandagatla wrote: >> 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 <sthumma@xxxxxxxxxxxxxx> >> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@xxxxxxxxxx> >> --- >> 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"); >> -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html