diff options
Diffstat (limited to '')
| -rw-r--r-- | drivers/ata/ahci_imx.c | 1253 |
1 files changed, 1253 insertions, 0 deletions
diff --git a/drivers/ata/ahci_imx.c b/drivers/ata/ahci_imx.c new file mode 100644 index 000000000..b00799d20 --- /dev/null +++ b/drivers/ata/ahci_imx.c @@ -0,0 +1,1253 @@ +/* + * copyright (c) 2013 Freescale Semiconductor, Inc. + * Freescale IMX AHCI SATA platform driver + * + * based on the AHCI SATA platform driver by Jeff Garzik and Anton Vorontsov + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope 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. + * + * You should have received a copy of the GNU General Public License along with + * this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/regmap.h> +#include <linux/ahci_platform.h> +#include <linux/of_device.h> +#include <linux/of_gpio.h> +#include <linux/mfd/syscon.h> +#include <linux/mfd/syscon/imx6q-iomuxc-gpr.h> +#include <linux/libata.h> +#include <linux/hwmon.h> +#include <linux/hwmon-sysfs.h> +#include <linux/thermal.h> +#include "ahci.h" + +#define DRV_NAME "ahci-imx" + +enum { + /* Timer 1-ms Register */ + IMX_TIMER1MS = 0x00e0, + /* Port0 PHY Control Register */ + IMX_P0PHYCR = 0x0178, + IMX_P0PHYCR_TEST_PDDQ = 1 << 20, + IMX_P0PHYCR_CR_READ = 1 << 19, + IMX_P0PHYCR_CR_WRITE = 1 << 18, + IMX_P0PHYCR_CR_CAP_DATA = 1 << 17, + IMX_P0PHYCR_CR_CAP_ADDR = 1 << 16, + /* Port0 PHY Status Register */ + IMX_P0PHYSR = 0x017c, + IMX_P0PHYSR_CR_ACK = 1 << 18, + IMX_P0PHYSR_CR_DATA_OUT = 0xffff << 0, + /* Lane0 Output Status Register */ + IMX_LANE0_OUT_STAT = 0x2003, + IMX_LANE0_OUT_STAT_RX_PLL_STATE = 1 << 1, + /* Clock Reset Register */ + IMX_CLOCK_RESET = 0x7f3f, + IMX_CLOCK_RESET_RESET = 1 << 0, + /* IMX8QM HSIO AHCI definitions */ + IMX8QM_SATA_PHY_RX_IMPED_RATIO_OFFSET = 0x03, + IMX8QM_SATA_PHY_TX_IMPED_RATIO_OFFSET = 0x09, + IMX8QM_SATA_PHY_IMPED_RATIO_85OHM = 0x6c, + IMX8QM_LPCG_PHYX2_OFFSET = 0x00000, + IMX8QM_CSR_PHYX2_OFFSET = 0x90000, + IMX8QM_CSR_PHYX1_OFFSET = 0xa0000, + IMX8QM_CSR_PHYX_STTS0_OFFSET = 0x4, + IMX8QM_CSR_PCIEA_OFFSET = 0xb0000, + IMX8QM_CSR_PCIEB_OFFSET = 0xc0000, + IMX8QM_CSR_SATA_OFFSET = 0xd0000, + IMX8QM_CSR_PCIE_CTRL2_OFFSET = 0x8, + IMX8QM_CSR_MISC_OFFSET = 0xe0000, + + IMX8QM_LPCG_PHYX2_PCLK0_MASK = (0x3 << 16), + IMX8QM_LPCG_PHYX2_PCLK1_MASK = (0x3 << 20), + IMX8QM_PHY_APB_RSTN_0 = BIT(0), + IMX8QM_PHY_MODE_SATA = BIT(19), + IMX8QM_PHY_MODE_MASK = (0xf << 17), + IMX8QM_PHY_PIPE_RSTN_0 = BIT(24), + IMX8QM_PHY_PIPE_RSTN_OVERRIDE_0 = BIT(25), + IMX8QM_PHY_PIPE_RSTN_1 = BIT(26), + IMX8QM_PHY_PIPE_RSTN_OVERRIDE_1 = BIT(27), + IMX8QM_STTS0_LANE0_TX_PLL_LOCK = BIT(4), + IMX8QM_MISC_IOB_RXENA = BIT(0), + IMX8QM_MISC_IOB_TXENA = BIT(1), + IMX8QM_MISC_PHYX1_EPCS_SEL = BIT(12), + IMX8QM_MISC_CLKREQN_OUT_OVERRIDE_1 = BIT(24), + IMX8QM_MISC_CLKREQN_OUT_OVERRIDE_0 = BIT(25), + IMX8QM_MISC_CLKREQN_IN_OVERRIDE_1 = BIT(28), + IMX8QM_MISC_CLKREQN_IN_OVERRIDE_0 = BIT(29), + IMX8QM_SATA_CTRL_RESET_N = BIT(12), + IMX8QM_SATA_CTRL_EPCS_PHYRESET_N = BIT(7), + IMX8QM_CTRL_BUTTON_RST_N = BIT(21), + IMX8QM_CTRL_POWER_UP_RST_N = BIT(23), + IMX8QM_CTRL_LTSSM_ENABLE = BIT(4), +}; + +enum ahci_imx_type { + AHCI_IMX53, + AHCI_IMX6Q, + AHCI_IMX6QP, + AHCI_IMX8QM, +}; + +struct imx_ahci_priv { + struct platform_device *ahci_pdev; + enum ahci_imx_type type; + struct clk *sata_clk; + struct clk *sata_ref_clk; + struct clk *ahb_clk; + struct clk *epcs_tx_clk; + struct clk *epcs_rx_clk; + struct clk *phy_apbclk; + struct clk *phy_pclk0; + struct clk *phy_pclk1; + void __iomem *phy_base; + int clkreq_gpio; + struct regmap *gpr; + bool no_device; + bool first_time; + u32 phy_params; + u32 imped_ratio; +}; + +static int ahci_imx_hotplug; +module_param_named(hotplug, ahci_imx_hotplug, int, 0644); +MODULE_PARM_DESC(hotplug, "AHCI IMX hot-plug support (0=Don't support, 1=support)"); + +static void ahci_imx_host_stop(struct ata_host *host); + +static int imx_phy_crbit_assert(void __iomem *mmio, u32 bit, bool assert) +{ + int timeout = 10; + u32 crval; + u32 srval; + + /* Assert or deassert the bit */ + crval = readl(mmio + IMX_P0PHYCR); + if (assert) + crval |= bit; + else + crval &= ~bit; + writel(crval, mmio + IMX_P0PHYCR); + + /* Wait for the cr_ack signal */ + do { + srval = readl(mmio + IMX_P0PHYSR); + if ((assert ? srval : ~srval) & IMX_P0PHYSR_CR_ACK) + break; + usleep_range(100, 200); + } while (--timeout); + + return timeout ? 0 : -ETIMEDOUT; +} + +static int imx_phy_reg_addressing(u16 addr, void __iomem *mmio) +{ + u32 crval = addr; + int ret; + + /* Supply the address on cr_data_in */ + writel(crval, mmio + IMX_P0PHYCR); + + /* Assert the cr_cap_addr signal */ + ret = imx_phy_crbit_assert(mmio, IMX_P0PHYCR_CR_CAP_ADDR, true); + if (ret) + return ret; + + /* Deassert cr_cap_addr */ + ret = imx_phy_crbit_assert(mmio, IMX_P0PHYCR_CR_CAP_ADDR, false); + if (ret) + return ret; + + return 0; +} + +static int imx_phy_reg_write(u16 val, void __iomem *mmio) +{ + u32 crval = val; + int ret; + + /* Supply the data on cr_data_in */ + writel(crval, mmio + IMX_P0PHYCR); + + /* Assert the cr_cap_data signal */ + ret = imx_phy_crbit_assert(mmio, IMX_P0PHYCR_CR_CAP_DATA, true); + if (ret) + return ret; + + /* Deassert cr_cap_data */ + ret = imx_phy_crbit_assert(mmio, IMX_P0PHYCR_CR_CAP_DATA, false); + if (ret) + return ret; + + if (val & IMX_CLOCK_RESET_RESET) { + /* + * In case we're resetting the phy, it's unable to acknowledge, + * so we return immediately here. + */ + crval |= IMX_P0PHYCR_CR_WRITE; + writel(crval, mmio + IMX_P0PHYCR); + goto out; + } + + /* Assert the cr_write signal */ + ret = imx_phy_crbit_assert(mmio, IMX_P0PHYCR_CR_WRITE, true); + if (ret) + return ret; + + /* Deassert cr_write */ + ret = imx_phy_crbit_assert(mmio, IMX_P0PHYCR_CR_WRITE, false); + if (ret) + return ret; + +out: + return 0; +} + +static int imx_phy_reg_read(u16 *val, void __iomem *mmio) +{ + int ret; + + /* Assert the cr_read signal */ + ret = imx_phy_crbit_assert(mmio, IMX_P0PHYCR_CR_READ, true); + if (ret) + return ret; + + /* Capture the data from cr_data_out[] */ + *val = readl(mmio + IMX_P0PHYSR) & IMX_P0PHYSR_CR_DATA_OUT; + + /* Deassert cr_read */ + ret = imx_phy_crbit_assert(mmio, IMX_P0PHYCR_CR_READ, false); + if (ret) + return ret; + + return 0; +} + +static int imx_sata_phy_reset(struct ahci_host_priv *hpriv) +{ + struct imx_ahci_priv *imxpriv = hpriv->plat_data; + void __iomem *mmio = hpriv->mmio; + int timeout = 10; + u16 val; + int ret; + + if (imxpriv->type == AHCI_IMX6QP) { + /* 6qp adds the sata reset mechanism, use it for 6qp sata */ + regmap_update_bits(imxpriv->gpr, IOMUXC_GPR5, + IMX6Q_GPR5_SATA_SW_PD, 0); + + regmap_update_bits(imxpriv->gpr, IOMUXC_GPR5, + IMX6Q_GPR5_SATA_SW_RST, 0); + udelay(50); + regmap_update_bits(imxpriv->gpr, IOMUXC_GPR5, + IMX6Q_GPR5_SATA_SW_RST, + IMX6Q_GPR5_SATA_SW_RST); + return 0; + } + + /* Reset SATA PHY by setting RESET bit of PHY register CLOCK_RESET */ + ret = imx_phy_reg_addressing(IMX_CLOCK_RESET, mmio); + if (ret) + return ret; + ret = imx_phy_reg_write(IMX_CLOCK_RESET_RESET, mmio); + if (ret) + return ret; + + /* Wait for PHY RX_PLL to be stable */ + do { + usleep_range(100, 200); + ret = imx_phy_reg_addressing(IMX_LANE0_OUT_STAT, mmio); + if (ret) + return ret; + ret = imx_phy_reg_read(&val, mmio); + if (ret) + return ret; + if (val & IMX_LANE0_OUT_STAT_RX_PLL_STATE) + break; + } while (--timeout); + + return timeout ? 0 : -ETIMEDOUT; +} + +enum { + /* SATA PHY Register */ + SATA_PHY_CR_CLOCK_CRCMP_LT_LIMIT = 0x0001, + SATA_PHY_CR_CLOCK_DAC_CTL = 0x0008, + SATA_PHY_CR_CLOCK_RTUNE_CTL = 0x0009, + SATA_PHY_CR_CLOCK_ADC_OUT = 0x000A, + SATA_PHY_CR_CLOCK_MPLL_TST = 0x0017, +}; + +static int read_adc_sum(void *dev, u16 rtune_ctl_reg, void __iomem * mmio) +{ + u16 adc_out_reg, read_sum; + u32 index, read_attempt; + const u32 attempt_limit = 200; + + imx_phy_reg_addressing(SATA_PHY_CR_CLOCK_RTUNE_CTL, mmio); + imx_phy_reg_write(rtune_ctl_reg, mmio); + + /* two dummy read */ + index = 0; + read_attempt = 0; + adc_out_reg = 0; + imx_phy_reg_addressing(SATA_PHY_CR_CLOCK_ADC_OUT, mmio); + while (index < 2) { + imx_phy_reg_read(&adc_out_reg, mmio); + /* check if valid */ + if (adc_out_reg & 0x400) + index++; + + read_attempt++; + if (read_attempt > attempt_limit) { + dev_err(dev, "Read REG more than %d times!\n", + attempt_limit); + break; + } + } + + index = 0; + read_attempt = 0; + read_sum = 0; + while (index < 80) { + imx_phy_reg_read(&adc_out_reg, mmio); + if (adc_out_reg & 0x400) { + read_sum = read_sum + (adc_out_reg & 0x3FF); + index++; + } + read_attempt++; + if (read_attempt > attempt_limit) { + dev_err(dev, "Read REG more than %d times!\n", + attempt_limit); + break; + } + } + + /* Use the U32 to make 1000 precision */ + return (read_sum * 1000) / 80; +} + +/* SATA AHCI temperature monitor */ +static int sata_ahci_read_temperature(void *dev, int *temp) +{ + u16 mpll_test_reg, rtune_ctl_reg, dac_ctl_reg, read_sum; + u32 str1, str2, str3, str4; + int m1, m2, a; + struct ahci_host_priv *hpriv = dev_get_drvdata(dev); + void __iomem *mmio = hpriv->mmio; + + /* check rd-wr to reg */ + read_sum = 0; + imx_phy_reg_addressing(SATA_PHY_CR_CLOCK_CRCMP_LT_LIMIT, mmio); + imx_phy_reg_write(read_sum, mmio); + imx_phy_reg_read(&read_sum, mmio); + if ((read_sum & 0xffff) != 0) + dev_err(dev, "Read/Write REG error, 0x%x!\n", read_sum); + + imx_phy_reg_write(0x5A5A, mmio); + imx_phy_reg_read(&read_sum, mmio); + if ((read_sum & 0xffff) != 0x5A5A) + dev_err(dev, "Read/Write REG error, 0x%x!\n", read_sum); + + imx_phy_reg_write(0x1234, mmio); + imx_phy_reg_read(&read_sum, mmio); + if ((read_sum & 0xffff) != 0x1234) + dev_err(dev, "Read/Write REG error, 0x%x!\n", read_sum); + + /* start temperature test */ + imx_phy_reg_addressing(SATA_PHY_CR_CLOCK_MPLL_TST, mmio); + imx_phy_reg_read(&mpll_test_reg, mmio); + imx_phy_reg_addressing(SATA_PHY_CR_CLOCK_RTUNE_CTL, mmio); + imx_phy_reg_read(&rtune_ctl_reg, mmio); + imx_phy_reg_addressing(SATA_PHY_CR_CLOCK_DAC_CTL, mmio); + imx_phy_reg_read(&dac_ctl_reg, mmio); + + /* mpll_tst.meas_iv ([12:2]) */ + str1 = (mpll_test_reg >> 2) & 0x7FF; + /* rtune_ctl.mode ([1:0]) */ + str2 = (rtune_ctl_reg) & 0x3; + /* dac_ctl.dac_mode ([14:12]) */ + str3 = (dac_ctl_reg >> 12) & 0x7; + /* rtune_ctl.sel_atbp ([4]) */ + str4 = (rtune_ctl_reg >> 4); + + /* Calculate the m1 */ + /* mpll_tst.meas_iv */ + mpll_test_reg = (mpll_test_reg & 0xE03) | (512) << 2; + /* rtune_ctl.mode */ + rtune_ctl_reg = (rtune_ctl_reg & 0xFFC) | (1); + /* dac_ctl.dac_mode */ + dac_ctl_reg = (dac_ctl_reg & 0x8FF) | (4) << 12; + /* rtune_ctl.sel_atbp */ + rtune_ctl_reg = (rtune_ctl_reg & 0xFEF) | (0) << 4; + imx_phy_reg_addressing(SATA_PHY_CR_CLOCK_MPLL_TST, mmio); + imx_phy_reg_write(mpll_test_reg, mmio); + imx_phy_reg_addressing(SATA_PHY_CR_CLOCK_DAC_CTL, mmio); + imx_phy_reg_write(dac_ctl_reg, mmio); + m1 = read_adc_sum(dev, rtune_ctl_reg, mmio); + + /* Calculate the m2 */ + /* rtune_ctl.sel_atbp */ + rtune_ctl_reg = (rtune_ctl_reg & 0xFEF) | (1) << 4; + m2 = read_adc_sum(dev, rtune_ctl_reg, mmio); + + /* restore the status */ + /* mpll_tst.meas_iv */ + mpll_test_reg = (mpll_test_reg & 0xE03) | (str1) << 2; + /* rtune_ctl.mode */ + rtune_ctl_reg = (rtune_ctl_reg & 0xFFC) | (str2); + /* dac_ctl.dac_mode */ + dac_ctl_reg = (dac_ctl_reg & 0x8FF) | (str3) << 12; + /* rtune_ctl.sel_atbp */ + rtune_ctl_reg = (rtune_ctl_reg & 0xFEF) | (str4) << 4; + + imx_phy_reg_addressing(SATA_PHY_CR_CLOCK_MPLL_TST, mmio); + imx_phy_reg_write(mpll_test_reg, mmio); + imx_phy_reg_addressing(SATA_PHY_CR_CLOCK_DAC_CTL, mmio); + imx_phy_reg_write(dac_ctl_reg, mmio); + imx_phy_reg_addressing(SATA_PHY_CR_CLOCK_RTUNE_CTL, mmio); + imx_phy_reg_write(rtune_ctl_reg, mmio); + + /* Compute temperature */ + if (!(m2 / 1000)) + m2 = 1000; + a = (m2 - m1) / (m2/1000); + *temp = ((-559) * a * a) / 1000 + (1379) * a + (-458000); + + return 0; +} + +static ssize_t sata_ahci_show_temp(struct device *dev, + struct device_attribute *da, + char *buf) +{ + unsigned int temp = 0; + int err; + + err = sata_ahci_read_temperature(dev, &temp); + if (err < 0) + return err; + + return sprintf(buf, "%u\n", temp); +} + +static const struct thermal_zone_of_device_ops fsl_sata_ahci_of_thermal_ops = { + .get_temp = sata_ahci_read_temperature, +}; + +static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, sata_ahci_show_temp, NULL, 0); + +static struct attribute *fsl_sata_ahci_attrs[] = { + &sensor_dev_attr_temp1_input.dev_attr.attr, + NULL +}; +ATTRIBUTE_GROUPS(fsl_sata_ahci); + +static int imx8_sata_enable(struct ahci_host_priv *hpriv) +{ + u32 val, reg; + int i, ret; + struct imx_ahci_priv *imxpriv = hpriv->plat_data; + struct device *dev = &imxpriv->ahci_pdev->dev; + + /* configure the hsio for sata */ + ret = clk_prepare_enable(imxpriv->phy_pclk0); + if (ret < 0) { + dev_err(dev, "can't enable phy_pclk0.\n"); + return ret; + } + ret = clk_prepare_enable(imxpriv->phy_pclk1); + if (ret < 0) { + dev_err(dev, "can't enable phy_pclk1.\n"); + goto disable_phy_pclk0; + } + ret = clk_prepare_enable(imxpriv->epcs_tx_clk); + if (ret < 0) { + dev_err(dev, "can't enable epcs_tx_clk.\n"); + goto disable_phy_pclk1; + } + ret = clk_prepare_enable(imxpriv->epcs_rx_clk); + if (ret < 0) { + dev_err(dev, "can't enable epcs_rx_clk.\n"); + goto disable_epcs_tx_clk; + } + ret = clk_prepare_enable(imxpriv->phy_apbclk); + if (ret < 0) { + dev_err(dev, "can't enable phy_apbclk.\n"); + goto disable_epcs_rx_clk; + } + /* Configure PHYx2 PIPE_RSTN */ + regmap_read(imxpriv->gpr, IMX8QM_CSR_PCIEA_OFFSET + + IMX8QM_CSR_PCIE_CTRL2_OFFSET, &val); + if ((val & IMX8QM_CTRL_LTSSM_ENABLE) == 0) { + /* The link of the PCIEA of HSIO is down */ + regmap_update_bits(imxpriv->gpr, + IMX8QM_CSR_PHYX2_OFFSET, + IMX8QM_PHY_PIPE_RSTN_0 | + IMX8QM_PHY_PIPE_RSTN_OVERRIDE_0, + IMX8QM_PHY_PIPE_RSTN_0 | + IMX8QM_PHY_PIPE_RSTN_OVERRIDE_0); + } + regmap_read(imxpriv->gpr, IMX8QM_CSR_PCIEB_OFFSET + + IMX8QM_CSR_PCIE_CTRL2_OFFSET, ®); + if ((reg & IMX8QM_CTRL_LTSSM_ENABLE) == 0) { + /* The link of the PCIEB of HSIO is down */ + regmap_update_bits(imxpriv->gpr, + IMX8QM_CSR_PHYX2_OFFSET, + IMX8QM_PHY_PIPE_RSTN_1 | + IMX8QM_PHY_PIPE_RSTN_OVERRIDE_1, + IMX8QM_PHY_PIPE_RSTN_1 | + IMX8QM_PHY_PIPE_RSTN_OVERRIDE_1); + } + if (((reg | val) & IMX8QM_CTRL_LTSSM_ENABLE) == 0) { + /* The links of both PCIA and PCIEB of HSIO are down */ + regmap_update_bits(imxpriv->gpr, + IMX8QM_LPCG_PHYX2_OFFSET, + IMX8QM_LPCG_PHYX2_PCLK0_MASK | + IMX8QM_LPCG_PHYX2_PCLK1_MASK, + 0); + } + + /* set PWR_RST and BT_RST of csr_pciea */ + val = IMX8QM_CSR_PCIEA_OFFSET + IMX8QM_CSR_PCIE_CTRL2_OFFSET; + regmap_update_bits(imxpriv->gpr, + val, + IMX8QM_CTRL_BUTTON_RST_N, + IMX8QM_CTRL_BUTTON_RST_N); + regmap_update_bits(imxpriv->gpr, + val, + IMX8QM_CTRL_POWER_UP_RST_N, + IMX8QM_CTRL_POWER_UP_RST_N); + + /* PHYX1_MODE to SATA */ + regmap_update_bits(imxpriv->gpr, + IMX8QM_CSR_PHYX1_OFFSET, + IMX8QM_PHY_MODE_MASK, + IMX8QM_PHY_MODE_SATA); + + /* + * BIT0 RXENA 1, BIT1 TXENA 0 + * BIT12 PHY_X1_EPCS_SEL 1. + */ + regmap_update_bits(imxpriv->gpr, + IMX8QM_CSR_MISC_OFFSET, + IMX8QM_MISC_IOB_RXENA, + IMX8QM_MISC_IOB_RXENA); + regmap_update_bits(imxpriv->gpr, + IMX8QM_CSR_MISC_OFFSET, + IMX8QM_MISC_IOB_TXENA, + 0); + regmap_update_bits(imxpriv->gpr, + IMX8QM_CSR_MISC_OFFSET, + IMX8QM_MISC_PHYX1_EPCS_SEL, + IMX8QM_MISC_PHYX1_EPCS_SEL); + /* + * It is possible, for PCIe and SATA are sharing + * the same clock source, HPLL or external oscillator. + * When PCIe is in low power modes (L1.X or L2 etc), + * the clock source can be turned off. In this case, + * if this clock source is required to be toggling by + * SATA, then SATA functions will be abnormal. + * Set the override here to avoid it. + */ + regmap_update_bits(imxpriv->gpr, + IMX8QM_CSR_MISC_OFFSET, + IMX8QM_MISC_CLKREQN_OUT_OVERRIDE_1 | + IMX8QM_MISC_CLKREQN_OUT_OVERRIDE_0 | + IMX8QM_MISC_CLKREQN_IN_OVERRIDE_1 | + IMX8QM_MISC_CLKREQN_IN_OVERRIDE_0, + IMX8QM_MISC_CLKREQN_OUT_OVERRIDE_1 | + IMX8QM_MISC_CLKREQN_OUT_OVERRIDE_0 | + IMX8QM_MISC_CLKREQN_IN_OVERRIDE_1 | + IMX8QM_MISC_CLKREQN_IN_OVERRIDE_0); + + /* clear PHY RST, then set it */ + regmap_update_bits(imxpriv->gpr, + IMX8QM_CSR_SATA_OFFSET, + IMX8QM_SATA_CTRL_EPCS_PHYRESET_N, + 0); + + regmap_update_bits(imxpriv->gpr, + IMX8QM_CSR_SATA_OFFSET, + IMX8QM_SATA_CTRL_EPCS_PHYRESET_N, + IMX8QM_SATA_CTRL_EPCS_PHYRESET_N); + + /* CTRL RST: SET -> delay 1 us -> CLEAR -> SET */ + regmap_update_bits(imxpriv->gpr, + IMX8QM_CSR_SATA_OFFSET, + IMX8QM_SATA_CTRL_RESET_N, + IMX8QM_SATA_CTRL_RESET_N); + udelay(1); + regmap_update_bits(imxpriv->gpr, + IMX8QM_CSR_SATA_OFFSET, + IMX8QM_SATA_CTRL_RESET_N, + 0); + regmap_update_bits(imxpriv->gpr, + IMX8QM_CSR_SATA_OFFSET, + IMX8QM_SATA_CTRL_RESET_N, + IMX8QM_SATA_CTRL_RESET_N); + + /* APB reset */ + regmap_update_bits(imxpriv->gpr, + IMX8QM_CSR_PHYX1_OFFSET, + IMX8QM_PHY_APB_RSTN_0, + IMX8QM_PHY_APB_RSTN_0); + + for (i = 0; i < 100; i++) { + reg = IMX8QM_CSR_PHYX1_OFFSET + + IMX8QM_CSR_PHYX_STTS0_OFFSET; + regmap_read(imxpriv->gpr, reg, &val); + val &= IMX8QM_STTS0_LANE0_TX_PLL_LOCK; + if (val == IMX8QM_STTS0_LANE0_TX_PLL_LOCK) + break; + udelay(1); + } + + if (val != IMX8QM_STTS0_LANE0_TX_PLL_LOCK) { + dev_err(dev, "TX PLL of the PHY is not locked\n"); + ret = -ENODEV; + } else { + writeb(imxpriv->imped_ratio, imxpriv->phy_base + + IMX8QM_SATA_PHY_RX_IMPED_RATIO_OFFSET); + writeb(imxpriv->imped_ratio, imxpriv->phy_base + + IMX8QM_SATA_PHY_TX_IMPED_RATIO_OFFSET); + reg = readb(imxpriv->phy_base + + IMX8QM_SATA_PHY_RX_IMPED_RATIO_OFFSET); + if (unlikely(reg != imxpriv->imped_ratio)) + dev_info(dev, "Can't set PHY RX impedance ratio.\n"); + reg = readb(imxpriv->phy_base + + IMX8QM_SATA_PHY_TX_IMPED_RATIO_OFFSET); + if (unlikely(reg != imxpriv->imped_ratio)) + dev_info(dev, "Can't set PHY TX impedance ratio.\n"); + usleep_range(50, 100); + + /* + * To reduce the power consumption, gate off + * the PHY clks + */ + clk_disable_unprepare(imxpriv->phy_apbclk); + clk_disable_unprepare(imxpriv->phy_pclk1); + clk_disable_unprepare(imxpriv->phy_pclk0); + return ret; + } + + clk_disable_unprepare(imxpriv->phy_apbclk); +disable_epcs_rx_clk: + clk_disable_unprepare(imxpriv->epcs_rx_clk); +disable_epcs_tx_clk: + clk_disable_unprepare(imxpriv->epcs_tx_clk); +disable_phy_pclk1: + clk_disable_unprepare(imxpriv->phy_pclk1); +disable_phy_pclk0: + clk_disable_unprepare(imxpriv->phy_pclk0); + + return ret; +} + +static int imx_sata_enable(struct ahci_host_priv *hpriv) +{ + struct imx_ahci_priv *imxpriv = hpriv->plat_data; + struct device *dev = &imxpriv->ahci_pdev->dev; + int ret; + + if (imxpriv->no_device) + return 0; + + ret = ahci_platform_enable_regulators(hpriv); + if (ret) + return ret; + + ret = clk_prepare_enable(imxpriv->sata_ref_clk); + if (ret < 0) + goto disable_regulator; + + if (imxpriv->type == AHCI_IMX6Q || imxpriv->type == AHCI_IMX6QP) { + /* + * set PHY Paremeters, two steps to configure the GPR13, + * one write for rest of parameters, mask of first write + * is 0x07ffffff, and the other one write for setting + * the mpll_clk_en. + */ + regmap_update_bits(imxpriv->gpr, IOMUXC_GPR13, + IMX6Q_GPR13_SATA_RX_EQ_VAL_MASK | + IMX6Q_GPR13_SATA_RX_LOS_LVL_MASK | + IMX6Q_GPR13_SATA_RX_DPLL_MODE_MASK | + IMX6Q_GPR13_SATA_SPD_MODE_MASK | + IMX6Q_GPR13_SATA_MPLL_SS_EN | + IMX6Q_GPR13_SATA_TX_ATTEN_MASK | + IMX6Q_GPR13_SATA_TX_BOOST_MASK | + IMX6Q_GPR13_SATA_TX_LVL_MASK | + IMX6Q_GPR13_SATA_MPLL_CLK_EN | + IMX6Q_GPR13_SATA_TX_EDGE_RATE, + imxpriv->phy_params); + regmap_update_bits(imxpriv->gpr, IOMUXC_GPR13, + IMX6Q_GPR13_SATA_MPLL_CLK_EN, + IMX6Q_GPR13_SATA_MPLL_CLK_EN); + + usleep_range(100, 200); + + ret = imx_sata_phy_reset(hpriv); + if (ret) { + dev_err(dev, "failed to reset phy: %d\n", ret); + goto disable_clk; + } + } else if (imxpriv->type == AHCI_IMX8QM) { + ret = imx8_sata_enable(hpriv); + } + + usleep_range(1000, 2000); + + return 0; + +disable_clk: + clk_disable_unprepare(imxpriv->sata_ref_clk); +disable_regulator: + ahci_platform_disable_regulators(hpriv); + + return ret; +} + +static void imx_sata_disable(struct ahci_host_priv *hpriv) +{ + struct imx_ahci_priv *imxpriv = hpriv->plat_data; + + if (imxpriv->no_device) + return; + + switch (imxpriv->type) { + case AHCI_IMX6QP: + regmap_update_bits(imxpriv->gpr, IOMUXC_GPR5, + IMX6Q_GPR5_SATA_SW_PD, + IMX6Q_GPR5_SATA_SW_PD); + regmap_update_bits(imxpriv->gpr, IOMUXC_GPR13, + IMX6Q_GPR13_SATA_MPLL_CLK_EN, + !IMX6Q_GPR13_SATA_MPLL_CLK_EN); + break; + + case AHCI_IMX6Q: + regmap_update_bits(imxpriv->gpr, IOMUXC_GPR13, + IMX6Q_GPR13_SATA_MPLL_CLK_EN, + !IMX6Q_GPR13_SATA_MPLL_CLK_EN); + break; + + case AHCI_IMX8QM: + clk_disable_unprepare(imxpriv->epcs_rx_clk); + clk_disable_unprepare(imxpriv->epcs_tx_clk); + break; + + default: + break; + } + + clk_disable_unprepare(imxpriv->sata_ref_clk); + + ahci_platform_disable_regulators(hpriv); +} + +static void ahci_imx_error_handler(struct ata_port *ap) +{ + u32 reg_val; + struct ata_device *dev; + struct ata_host *host = dev_get_drvdata(ap->dev); + struct ahci_host_priv *hpriv = host->private_data; + void __iomem *mmio = hpriv->mmio; + struct imx_ahci_priv *imxpriv = hpriv->plat_data; + + ahci_error_handler(ap); + + if (!(imxpriv->first_time) || ahci_imx_hotplug) + return; + + imxpriv->first_time = false; + + ata_for_each_dev(dev, &ap->link, ENABLED) + return; + /* + * Disable link to save power. An imx ahci port can't be recovered + * without full reset once the pddq mode is enabled making it + * impossible to use as part of libata LPM. + */ + reg_val = readl(mmio + IMX_P0PHYCR); + writel(reg_val | IMX_P0PHYCR_TEST_PDDQ, mmio + IMX_P0PHYCR); + imx_sata_disable(hpriv); + imxpriv->no_device = true; + + dev_info(ap->dev, "no device found, disabling link.\n"); + dev_info(ap->dev, "pass " MODULE_PARAM_PREFIX ".hotplug=1 to enable hotplug\n"); +} + +static int ahci_imx_softreset(struct ata_link *link, unsigned int *class, + unsigned long deadline) +{ + struct ata_port *ap = link->ap; + struct ata_host *host = dev_get_drvdata(ap->dev); + struct ahci_host_priv *hpriv = host->private_data; + struct imx_ahci_priv *imxpriv = hpriv->plat_data; + int ret = -EIO; + + if (imxpriv->type == AHCI_IMX53) + ret = ahci_pmp_retry_srst_ops.softreset(link, class, deadline); + else + ret = ahci_ops.softreset(link, class, deadline); + + return ret; +} + +static struct ata_port_operations ahci_imx_ops = { + .inherits = &ahci_ops, + .host_stop = ahci_imx_host_stop, + .error_handler = ahci_imx_error_handler, + .softreset = ahci_imx_softreset, +}; + +static const struct ata_port_info ahci_imx_port_info = { + .flags = AHCI_FLAG_COMMON, + .pio_mask = ATA_PIO4, + .udma_mask = ATA_UDMA6, + .port_ops = &ahci_imx_ops, +}; + +static const struct of_device_id imx_ahci_of_match[] = { + { .compatible = "fsl,imx53-ahci", .data = (void *)AHCI_IMX53 }, + { .compatible = "fsl,imx6q-ahci", .data = (void *)AHCI_IMX6Q }, + { .compatible = "fsl,imx6qp-ahci", .data = (void *)AHCI_IMX6QP }, + { .compatible = "fsl,imx8qm-ahci", .data = (void *)AHCI_IMX8QM }, + {}, +}; +MODULE_DEVICE_TABLE(of, imx_ahci_of_match); + +struct reg_value { + u32 of_value; + u32 reg_value; +}; + +struct reg_property { + const char *name; + const struct reg_value *values; + size_t num_values; + u32 def_value; + u32 set_value; +}; + +static const struct reg_value gpr13_tx_level[] = { + { 937, IMX6Q_GPR13_SATA_TX_LVL_0_937_V }, + { 947, IMX6Q_GPR13_SATA_TX_LVL_0_947_V }, + { 957, IMX6Q_GPR13_SATA_TX_LVL_0_957_V }, + { 966, IMX6Q_GPR13_SATA_TX_LVL_0_966_V }, + { 976, IMX6Q_GPR13_SATA_TX_LVL_0_976_V }, + { 986, IMX6Q_GPR13_SATA_TX_LVL_0_986_V }, + { 996, IMX6Q_GPR13_SATA_TX_LVL_0_996_V }, + { 1005, IMX6Q_GPR13_SATA_TX_LVL_1_005_V }, + { 1015, IMX6Q_GPR13_SATA_TX_LVL_1_015_V }, + { 1025, IMX6Q_GPR13_SATA_TX_LVL_1_025_V }, + { 1035, IMX6Q_GPR13_SATA_TX_LVL_1_035_V }, + { 1045, IMX6Q_GPR13_SATA_TX_LVL_1_045_V }, + { 1054, IMX6Q_GPR13_SATA_TX_LVL_1_054_V }, + { 1064, IMX6Q_GPR13_SATA_TX_LVL_1_064_V }, + { 1074, IMX6Q_GPR13_SATA_TX_LVL_1_074_V }, + { 1084, IMX6Q_GPR13_SATA_TX_LVL_1_084_V }, + { 1094, IMX6Q_GPR13_SATA_TX_LVL_1_094_V }, + { 1104, IMX6Q_GPR13_SATA_TX_LVL_1_104_V }, + { 1113, IMX6Q_GPR13_SATA_TX_LVL_1_113_V }, + { 1123, IMX6Q_GPR13_SATA_TX_LVL_1_123_V }, + { 1133, IMX6Q_GPR13_SATA_TX_LVL_1_133_V }, + { 1143, IMX6Q_GPR13_SATA_TX_LVL_1_143_V }, + { 1152, IMX6Q_GPR13_SATA_TX_LVL_1_152_V }, + { 1162, IMX6Q_GPR13_SATA_TX_LVL_1_162_V }, + { 1172, IMX6Q_GPR13_SATA_TX_LVL_1_172_V }, + { 1182, IMX6Q_GPR13_SATA_TX_LVL_1_182_V }, + { 1191, IMX6Q_GPR13_SATA_TX_LVL_1_191_V }, + { 1201, IMX6Q_GPR13_SATA_TX_LVL_1_201_V }, + { 1211, IMX6Q_GPR13_SATA_TX_LVL_1_211_V }, + { 1221, IMX6Q_GPR13_SATA_TX_LVL_1_221_V }, + { 1230, IMX6Q_GPR13_SATA_TX_LVL_1_230_V }, + { 1240, IMX6Q_GPR13_SATA_TX_LVL_1_240_V } +}; + +static const struct reg_value gpr13_tx_boost[] = { + { 0, IMX6Q_GPR13_SATA_TX_BOOST_0_00_DB }, + { 370, IMX6Q_GPR13_SATA_TX_BOOST_0_37_DB }, + { 740, IMX6Q_GPR13_SATA_TX_BOOST_0_74_DB }, + { 1110, IMX6Q_GPR13_SATA_TX_BOOST_1_11_DB }, + { 1480, IMX6Q_GPR13_SATA_TX_BOOST_1_48_DB }, + { 1850, IMX6Q_GPR13_SATA_TX_BOOST_1_85_DB }, + { 2220, IMX6Q_GPR13_SATA_TX_BOOST_2_22_DB }, + { 2590, IMX6Q_GPR13_SATA_TX_BOOST_2_59_DB }, + { 2960, IMX6Q_GPR13_SATA_TX_BOOST_2_96_DB }, + { 3330, IMX6Q_GPR13_SATA_TX_BOOST_3_33_DB }, + { 3700, IMX6Q_GPR13_SATA_TX_BOOST_3_70_DB }, + { 4070, IMX6Q_GPR13_SATA_TX_BOOST_4_07_DB }, + { 4440, IMX6Q_GPR13_SATA_TX_BOOST_4_44_DB }, + { 4810, IMX6Q_GPR13_SATA_TX_BOOST_4_81_DB }, + { 5280, IMX6Q_GPR13_SATA_TX_BOOST_5_28_DB }, + { 5750, IMX6Q_GPR13_SATA_TX_BOOST_5_75_DB } +}; + +static const struct reg_value gpr13_tx_atten[] = { + { 8, IMX6Q_GPR13_SATA_TX_ATTEN_8_16 }, + { 9, IMX6Q_GPR13_SATA_TX_ATTEN_9_16 }, + { 10, IMX6Q_GPR13_SATA_TX_ATTEN_10_16 }, + { 12, IMX6Q_GPR13_SATA_TX_ATTEN_12_16 }, + { 14, IMX6Q_GPR13_SATA_TX_ATTEN_14_16 }, + { 16, IMX6Q_GPR13_SATA_TX_ATTEN_16_16 }, +}; + +static const struct reg_value gpr13_rx_eq[] = { + { 500, IMX6Q_GPR13_SATA_RX_EQ_VAL_0_5_DB }, + { 1000, IMX6Q_GPR13_SATA_RX_EQ_VAL_1_0_DB }, + { 1500, IMX6Q_GPR13_SATA_RX_EQ_VAL_1_5_DB }, + { 2000, IMX6Q_GPR13_SATA_RX_EQ_VAL_2_0_DB }, + { 2500, IMX6Q_GPR13_SATA_RX_EQ_VAL_2_5_DB }, + { 3000, IMX6Q_GPR13_SATA_RX_EQ_VAL_3_0_DB }, + { 3500, IMX6Q_GPR13_SATA_RX_EQ_VAL_3_5_DB }, + { 4000, IMX6Q_GPR13_SATA_RX_EQ_VAL_4_0_DB }, +}; + +static const struct reg_property gpr13_props[] = { + { + .name = "fsl,transmit-level-mV", + .values = gpr13_tx_level, + .num_values = ARRAY_SIZE(gpr13_tx_level), + .def_value = IMX6Q_GPR13_SATA_TX_LVL_1_025_V, + }, { + .name = "fsl,transmit-boost-mdB", + .values = gpr13_tx_boost, + .num_values = ARRAY_SIZE(gpr13_tx_boost), + .def_value = IMX6Q_GPR13_SATA_TX_BOOST_3_33_DB, + }, { + .name = "fsl,transmit-atten-16ths", + .values = gpr13_tx_atten, + .num_values = ARRAY_SIZE(gpr13_tx_atten), + .def_value = IMX6Q_GPR13_SATA_TX_ATTEN_9_16, + }, { + .name = "fsl,receive-eq-mdB", + .values = gpr13_rx_eq, + .num_values = ARRAY_SIZE(gpr13_rx_eq), + .def_value = IMX6Q_GPR13_SATA_RX_EQ_VAL_3_0_DB, + }, { + .name = "fsl,no-spread-spectrum", + .def_value = IMX6Q_GPR13_SATA_MPLL_SS_EN, + .set_value = 0, + }, +}; + +static u32 imx_ahci_parse_props(struct device *dev, + const struct reg_property *prop, size_t num) +{ + struct device_node *np = dev->of_node; + u32 reg_value = 0; + int i, j; + + for (i = 0; i < num; i++, prop++) { + u32 of_val; + + if (prop->num_values == 0) { + if (of_property_read_bool(np, prop->name)) + reg_value |= prop->set_value; + else + reg_value |= prop->def_value; + continue; + } + + if (of_property_read_u32(np, prop->name, &of_val)) { + dev_info(dev, "%s not specified, using %08x\n", + prop->name, prop->def_value); + reg_value |= prop->def_value; + continue; + } + + for (j = 0; j < prop->num_values; j++) { + if (prop->values[j].of_value == of_val) { + dev_info(dev, "%s value %u, using %08x\n", + prop->name, of_val, prop->values[j].reg_value); + reg_value |= prop->values[j].reg_value; + break; + } + } + + if (j == prop->num_values) { + dev_err(dev, "DT property %s is not a valid value\n", + prop->name); + reg_value |= prop->def_value; + } + } + + return reg_value; +} + +static struct scsi_host_template ahci_platform_sht = { + AHCI_SHT(DRV_NAME), +}; + +static int imx8_sata_probe(struct device *dev, struct imx_ahci_priv *imxpriv) +{ + int ret; + struct resource *phy_res; + struct platform_device *pdev = imxpriv->ahci_pdev; + struct device_node *np = dev->of_node; + + if (of_property_read_u32(np, "fsl,phy-imp", &imxpriv->imped_ratio)) + imxpriv->imped_ratio = IMX8QM_SATA_PHY_IMPED_RATIO_85OHM; + phy_res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "phy"); + if (phy_res) { + imxpriv->phy_base = devm_ioremap(dev, phy_res->start, + resource_size(phy_res)); + if (!imxpriv->phy_base) { + dev_err(dev, "error with ioremap\n"); + return -ENOMEM; + } + } else { + dev_err(dev, "missing *phy* reg region.\n"); + return -ENOMEM; + } + imxpriv->gpr = + syscon_regmap_lookup_by_phandle(np, "hsio"); + if (IS_ERR(imxpriv->gpr)) { + dev_err(dev, "unable to find gpr registers\n"); + return PTR_ERR(imxpriv->gpr); + } + + imxpriv->epcs_tx_clk = devm_clk_get(dev, "epcs_tx"); + if (IS_ERR(imxpriv->epcs_tx_clk)) { + dev_err(dev, "can't get epcs_tx_clk clock.\n"); + return PTR_ERR(imxpriv->epcs_tx_clk); + } + imxpriv->epcs_rx_clk = devm_clk_get(dev, "epcs_rx"); + if (IS_ERR(imxpriv->epcs_rx_clk)) { + dev_err(dev, "can't get epcs_rx_clk clock.\n"); + return PTR_ERR(imxpriv->epcs_rx_clk); + } + imxpriv->phy_pclk0 = devm_clk_get(dev, "phy_pclk0"); + if (IS_ERR(imxpriv->phy_pclk0)) { + dev_err(dev, "can't get phy_pclk0 clock.\n"); + return PTR_ERR(imxpriv->phy_pclk0); + } + imxpriv->phy_pclk1 = devm_clk_get(dev, "phy_pclk1"); + if (IS_ERR(imxpriv->phy_pclk1)) { + dev_err(dev, "can't get phy_pclk1 clock.\n"); + return PTR_ERR(imxpriv->phy_pclk1); + } + imxpriv->phy_apbclk = devm_clk_get(dev, "phy_apbclk"); + if (IS_ERR(imxpriv->phy_apbclk)) { + dev_err(dev, "can't get phy_apbclk clock.\n"); + return PTR_ERR(imxpriv->phy_apbclk); + } + + /* Fetch GPIO, then enable the external OSC */ + imxpriv->clkreq_gpio = of_get_named_gpio(np, "clkreq-gpio", 0); + if (gpio_is_valid(imxpriv->clkreq_gpio)) { + ret = devm_gpio_request_one(dev, imxpriv->clkreq_gpio, + GPIOF_OUT_INIT_LOW, + "SATA CLKREQ"); + if (ret == -EBUSY) { + dev_info(dev, "clkreq had been initialized.\n"); + } else if (ret) { + dev_err(dev, "%d unable to get clkreq.\n", ret); + return ret; + } + } else if (imxpriv->clkreq_gpio == -EPROBE_DEFER) { + return imxpriv->clkreq_gpio; + } + + return 0; +} + +static int imx_ahci_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + const struct of_device_id *of_id; + struct ahci_host_priv *hpriv; + struct imx_ahci_priv *imxpriv; + unsigned int reg_val; + int ret; + + of_id = of_match_device(imx_ahci_of_match, dev); + if (!of_id) + return -EINVAL; + + imxpriv = devm_kzalloc(dev, sizeof(*imxpriv), GFP_KERNEL); + if (!imxpriv) + return -ENOMEM; + + imxpriv->ahci_pdev = pdev; + imxpriv->no_device = false; + imxpriv->first_time = true; + imxpriv->type = (enum ahci_imx_type)of_id->data; + + imxpriv->sata_clk = devm_clk_get(dev, "sata"); + if (IS_ERR(imxpriv->sata_clk)) { + dev_err(dev, "can't get sata clock.\n"); + return PTR_ERR(imxpriv->sata_clk); + } + + imxpriv->sata_ref_clk = devm_clk_get(dev, "sata_ref"); + if (IS_ERR(imxpriv->sata_ref_clk)) { + dev_err(dev, "can't get sata_ref clock.\n"); + return PTR_ERR(imxpriv->sata_ref_clk); + } + + imxpriv->ahb_clk = devm_clk_get(dev, "ahb"); + if (IS_ERR(imxpriv->ahb_clk)) { + dev_err(dev, "can't get ahb clock.\n"); + return PTR_ERR(imxpriv->ahb_clk); + } + + if (imxpriv->type == AHCI_IMX6Q || imxpriv->type == AHCI_IMX6QP) { + u32 reg_value; + + imxpriv->gpr = syscon_regmap_lookup_by_compatible( + "fsl,imx6q-iomuxc-gpr"); + if (IS_ERR(imxpriv->gpr)) { + dev_err(dev, + "failed to find fsl,imx6q-iomux-gpr regmap\n"); + return PTR_ERR(imxpriv->gpr); + } + + reg_value = imx_ahci_parse_props(dev, gpr13_props, + ARRAY_SIZE(gpr13_props)); + + imxpriv->phy_params = + IMX6Q_GPR13_SATA_RX_LOS_LVL_SATA2M | + IMX6Q_GPR13_SATA_RX_DPLL_MODE_2P_4F | + IMX6Q_GPR13_SATA_SPD_MODE_3P0G | + reg_value; + } else if (imxpriv->type == AHCI_IMX8QM) { + ret = imx8_sata_probe(dev, imxpriv); + if (ret) + return ret; + } + + hpriv = ahci_platform_get_resources(pdev, 0); + if (IS_ERR(hpriv)) + return PTR_ERR(hpriv); + + hpriv->plat_data = imxpriv; + + ret = clk_prepare_enable(imxpriv->sata_clk); + if (ret) + return ret; + + if (imxpriv->type == AHCI_IMX53 && + IS_ENABLED(CONFIG_HWMON)) { + /* Add the temperature monitor */ + struct device *hwmon_dev; + + hwmon_dev = + devm_hwmon_device_register_with_groups(dev, + "sata_ahci", + hpriv, + fsl_sata_ahci_groups); + if (IS_ERR(hwmon_dev)) { + ret = PTR_ERR(hwmon_dev); + goto disable_clk; + } + devm_thermal_zone_of_sensor_register(hwmon_dev, 0, hwmon_dev, + &fsl_sata_ahci_of_thermal_ops); + dev_info(dev, "%s: sensor 'sata_ahci'\n", dev_name(hwmon_dev)); + } + + ret = imx_sata_enable(hpriv); + if (ret) + goto disable_clk; + + /* + * Configure the HWINIT bits of the HOST_CAP and HOST_PORTS_IMPL, + * and IP vendor specific register IMX_TIMER1MS. + * Configure CAP_SSS (support stagered spin up). + * Implement the port0. + * Get the ahb clock rate, and configure the TIMER1MS register. + */ + reg_val = readl(hpriv->mmio + HOST_CAP); + if (!(reg_val & HOST_CAP_SSS)) { + reg_val |= HOST_CAP_SSS; + writel(reg_val, hpriv->mmio + HOST_CAP); + } + reg_val = readl(hpriv->mmio + HOST_PORTS_IMPL); + if (!(reg_val & 0x1)) { + reg_val |= 0x1; + writel(reg_val, hpriv->mmio + HOST_PORTS_IMPL); + } + + reg_val = clk_get_rate(imxpriv->ahb_clk) / 1000; + writel(reg_val, hpriv->mmio + IMX_TIMER1MS); + + ret = ahci_platform_init_host(pdev, hpriv, &ahci_imx_port_info, + &ahci_platform_sht); + if (ret) + goto disable_sata; + + return 0; + +disable_sata: + imx_sata_disable(hpriv); +disable_clk: + clk_disable_unprepare(imxpriv->sata_clk); + return ret; +} + +static void ahci_imx_host_stop(struct ata_host *host) +{ + struct ahci_host_priv *hpriv = host->private_data; + struct imx_ahci_priv *imxpriv = hpriv->plat_data; + + imx_sata_disable(hpriv); + clk_disable_unprepare(imxpriv->sata_clk); +} + +#ifdef CONFIG_PM_SLEEP +static int imx_ahci_suspend(struct device *dev) +{ + struct ata_host *host = dev_get_drvdata(dev); + struct ahci_host_priv *hpriv = host->private_data; + int ret; + + ret = ahci_platform_suspend_host(dev); + if (ret) + return ret; + + imx_sata_disable(hpriv); + + return 0; +} + +static int imx_ahci_resume(struct device *dev) +{ + struct ata_host *host = dev_get_drvdata(dev); + struct ahci_host_priv *hpriv = host->private_data; + int ret; + + ret = imx_sata_enable(hpriv); + if (ret) + return ret; + + return ahci_platform_resume_host(dev); +} +#endif + +static SIMPLE_DEV_PM_OPS(ahci_imx_pm_ops, imx_ahci_suspend, imx_ahci_resume); + +static struct platform_driver imx_ahci_driver = { + .probe = imx_ahci_probe, + .remove = ata_platform_remove_one, + .driver = { + .name = DRV_NAME, + .of_match_table = imx_ahci_of_match, + .pm = &ahci_imx_pm_ops, + }, +}; +module_platform_driver(imx_ahci_driver); + +MODULE_DESCRIPTION("Freescale i.MX AHCI SATA platform driver"); +MODULE_AUTHOR("Richard Zhu <Hong-Xing.Zhu@freescale.com>"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("ahci:imx"); |