| Message ID | 1722581213-15221-3-git-send-email-hongxing.zhu@nxp.com (mailing list archive) |
|---|---|
| State | Handled Elsewhere |
| Headers | show |
| Series | Refine i.MX8QM SATA based on generic PHY callbacks | expand |
On Fri, Aug 02, 2024 at 02:46:50PM +0800, Richard Zhu wrote: > Clean up code by using PHY interface provided by the PHY driver under > PHY subsystem(drivers/phy/freescale/phy-fsl-imx8qm-hsio.c). > > Signed-off-by: Richard Zhu <hongxing.zhu@nxp.com> Reviewed-by: Frank Li <Frank.Li@nxp.com> > --- > drivers/ata/ahci_imx.c | 365 +++++++++-------------------------------- > 1 file changed, 80 insertions(+), 285 deletions(-) > > diff --git a/drivers/ata/ahci_imx.c b/drivers/ata/ahci_imx.c > index cb768f66f0a70..75258ed42d2ee 100644 > --- a/drivers/ata/ahci_imx.c > +++ b/drivers/ata/ahci_imx.c > @@ -19,6 +19,7 @@ > #include <linux/libata.h> > #include <linux/hwmon.h> > #include <linux/hwmon-sysfs.h> > +#include <linux/phy/phy.h> > #include <linux/thermal.h> > #include "ahci.h" > > @@ -44,42 +45,6 @@ enum { > /* 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 { > @@ -95,14 +60,10 @@ struct imx_ahci_priv { > 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; > - struct gpio_desc *clkreq_gpiod; > struct regmap *gpr; > + struct phy *sata_phy; > + struct phy *cali_phy0; > + struct phy *cali_phy1; > bool no_device; > bool first_time; > u32 phy_params; > @@ -450,201 +411,73 @@ ATTRIBUTE_GROUPS(fsl_sata_ahci); > > static int imx8_sata_enable(struct ahci_host_priv *hpriv) > { > - u32 val, reg; > - int i, ret; > + u32 val; > + int 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"); > + /* > + * Since "REXT" pin is only present for first lane of i.MX8QM > + * PHY, its calibration results will be stored, passed through > + * to the second lane PHY, and shared with all three lane PHYs. > + * > + * Initialize the first two lane PHYs here, although only the > + * third lane PHY is used by SATA. > + */ > + ret = phy_init(imxpriv->cali_phy0); > + if (ret) { > + dev_err(dev, "cali PHY init failed\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 = phy_power_on(imxpriv->cali_phy0); > + if (ret) { > + dev_err(dev, "cali PHY power on failed\n"); > + goto err_cali_phy0_exit; > } > - 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 = phy_init(imxpriv->cali_phy1); > + if (ret) { > + dev_err(dev, "cali PHY1 init failed\n"); > + goto err_cali_phy0_off; > } > - 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 = phy_power_on(imxpriv->cali_phy1); > + if (ret) { > + dev_err(dev, "cali PHY1 power on failed\n"); > + goto err_cali_phy1_exit; > } > - ret = clk_prepare_enable(imxpriv->phy_apbclk); > - if (ret < 0) { > - dev_err(dev, "can't enable phy_apbclk.\n"); > - goto disable_epcs_rx_clk; > + ret = phy_init(imxpriv->sata_phy); > + if (ret) { > + dev_err(dev, "sata PHY init failed\n"); > + goto err_cali_phy1_off; > } > - /* 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); > + ret = phy_set_mode(imxpriv->sata_phy, PHY_MODE_SATA); > + if (ret) { > + dev_err(dev, "unable to set SATA PHY mode\n"); > + goto err_sata_phy_exit; > } > - 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); > + ret = phy_power_on(imxpriv->sata_phy); > + if (ret) { > + dev_err(dev, "sata PHY power up failed\n"); > + goto err_sata_phy_exit; > } > > - /* 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); > + /* The cali_phy# can be turned off after SATA PHY is initialized. */ > + phy_power_off(imxpriv->cali_phy1); > + phy_exit(imxpriv->cali_phy1); > + phy_power_off(imxpriv->cali_phy0); > + phy_exit(imxpriv->cali_phy0); > > - /* > - * 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; > - } > + return 0; > > - 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); > +err_sata_phy_exit: > + phy_exit(imxpriv->sata_phy); > +err_cali_phy1_off: > + phy_power_off(imxpriv->cali_phy1); > +err_cali_phy1_exit: > + phy_exit(imxpriv->cali_phy1); > +err_cali_phy0_off: > + phy_power_off(imxpriv->cali_phy0); > +err_cali_phy0_exit: > + phy_exit(imxpriv->cali_phy0); > > return ret; > } > @@ -698,6 +531,9 @@ static int imx_sata_enable(struct ahci_host_priv *hpriv) > } > } else if (imxpriv->type == AHCI_IMX8QM) { > ret = imx8_sata_enable(hpriv); > + if (ret) > + goto disable_clk; > + > } > > usleep_range(1000, 2000); > @@ -736,8 +572,10 @@ static void imx_sata_disable(struct ahci_host_priv *hpriv) > break; > > case AHCI_IMX8QM: > - clk_disable_unprepare(imxpriv->epcs_rx_clk); > - clk_disable_unprepare(imxpriv->epcs_tx_clk); > + if (imxpriv->sata_phy) { > + phy_power_off(imxpriv->sata_phy); > + phy_exit(imxpriv->sata_phy); > + } > break; > > default: > @@ -760,6 +598,9 @@ static void ahci_imx_error_handler(struct ata_port *ap) > > ahci_error_handler(ap); > > + if (imxpriv->type == AHCI_IMX8QM) > + return; > + > if (!(imxpriv->first_time) || ahci_imx_hotplug) > return; > > @@ -986,65 +827,19 @@ static const struct scsi_host_template ahci_platform_sht = { > > static int imx8_sata_probe(struct device *dev, struct imx_ahci_priv *imxpriv) > { > - 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_gpiod = devm_gpiod_get_optional(dev, "clkreq", > - GPIOD_OUT_LOW | GPIOD_FLAGS_BIT_NONEXCLUSIVE); > - if (IS_ERR(imxpriv->clkreq_gpiod)) > - return PTR_ERR(imxpriv->clkreq_gpiod); > - if (imxpriv->clkreq_gpiod) > - gpiod_set_consumer_name(imxpriv->clkreq_gpiod, "SATA CLKREQ"); > - > + imxpriv->sata_phy = devm_phy_get(dev, "sata-phy"); > + if (IS_ERR(imxpriv->sata_phy)) > + return dev_err_probe(dev, PTR_ERR(imxpriv->sata_phy), > + "Failed to get sata_phy\n"); > + > + imxpriv->cali_phy0 = devm_phy_get(dev, "cali-phy0"); > + if (IS_ERR(imxpriv->cali_phy0)) > + return dev_err_probe(dev, PTR_ERR(imxpriv->cali_phy0), > + "Failed to get cali_phy0\n"); > + imxpriv->cali_phy1 = devm_phy_get(dev, "cali-phy1"); > + if (IS_ERR(imxpriv->cali_phy1)) > + return dev_err_probe(dev, PTR_ERR(imxpriv->cali_phy1), > + "Failed to get cali_phy1\n"); > return 0; > } > > -- > 2.37.1 >
diff --git a/drivers/ata/ahci_imx.c b/drivers/ata/ahci_imx.c index cb768f66f0a70..75258ed42d2ee 100644 --- a/drivers/ata/ahci_imx.c +++ b/drivers/ata/ahci_imx.c @@ -19,6 +19,7 @@ #include <linux/libata.h> #include <linux/hwmon.h> #include <linux/hwmon-sysfs.h> +#include <linux/phy/phy.h> #include <linux/thermal.h> #include "ahci.h" @@ -44,42 +45,6 @@ enum { /* 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 { @@ -95,14 +60,10 @@ struct imx_ahci_priv { 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; - struct gpio_desc *clkreq_gpiod; struct regmap *gpr; + struct phy *sata_phy; + struct phy *cali_phy0; + struct phy *cali_phy1; bool no_device; bool first_time; u32 phy_params; @@ -450,201 +411,73 @@ ATTRIBUTE_GROUPS(fsl_sata_ahci); static int imx8_sata_enable(struct ahci_host_priv *hpriv) { - u32 val, reg; - int i, ret; + u32 val; + int 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"); + /* + * Since "REXT" pin is only present for first lane of i.MX8QM + * PHY, its calibration results will be stored, passed through + * to the second lane PHY, and shared with all three lane PHYs. + * + * Initialize the first two lane PHYs here, although only the + * third lane PHY is used by SATA. + */ + ret = phy_init(imxpriv->cali_phy0); + if (ret) { + dev_err(dev, "cali PHY init failed\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 = phy_power_on(imxpriv->cali_phy0); + if (ret) { + dev_err(dev, "cali PHY power on failed\n"); + goto err_cali_phy0_exit; } - 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 = phy_init(imxpriv->cali_phy1); + if (ret) { + dev_err(dev, "cali PHY1 init failed\n"); + goto err_cali_phy0_off; } - 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 = phy_power_on(imxpriv->cali_phy1); + if (ret) { + dev_err(dev, "cali PHY1 power on failed\n"); + goto err_cali_phy1_exit; } - ret = clk_prepare_enable(imxpriv->phy_apbclk); - if (ret < 0) { - dev_err(dev, "can't enable phy_apbclk.\n"); - goto disable_epcs_rx_clk; + ret = phy_init(imxpriv->sata_phy); + if (ret) { + dev_err(dev, "sata PHY init failed\n"); + goto err_cali_phy1_off; } - /* 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); + ret = phy_set_mode(imxpriv->sata_phy, PHY_MODE_SATA); + if (ret) { + dev_err(dev, "unable to set SATA PHY mode\n"); + goto err_sata_phy_exit; } - 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); + ret = phy_power_on(imxpriv->sata_phy); + if (ret) { + dev_err(dev, "sata PHY power up failed\n"); + goto err_sata_phy_exit; } - /* 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); + /* The cali_phy# can be turned off after SATA PHY is initialized. */ + phy_power_off(imxpriv->cali_phy1); + phy_exit(imxpriv->cali_phy1); + phy_power_off(imxpriv->cali_phy0); + phy_exit(imxpriv->cali_phy0); - /* - * 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; - } + return 0; - 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); +err_sata_phy_exit: + phy_exit(imxpriv->sata_phy); +err_cali_phy1_off: + phy_power_off(imxpriv->cali_phy1); +err_cali_phy1_exit: + phy_exit(imxpriv->cali_phy1); +err_cali_phy0_off: + phy_power_off(imxpriv->cali_phy0); +err_cali_phy0_exit: + phy_exit(imxpriv->cali_phy0); return ret; } @@ -698,6 +531,9 @@ static int imx_sata_enable(struct ahci_host_priv *hpriv) } } else if (imxpriv->type == AHCI_IMX8QM) { ret = imx8_sata_enable(hpriv); + if (ret) + goto disable_clk; + } usleep_range(1000, 2000); @@ -736,8 +572,10 @@ static void imx_sata_disable(struct ahci_host_priv *hpriv) break; case AHCI_IMX8QM: - clk_disable_unprepare(imxpriv->epcs_rx_clk); - clk_disable_unprepare(imxpriv->epcs_tx_clk); + if (imxpriv->sata_phy) { + phy_power_off(imxpriv->sata_phy); + phy_exit(imxpriv->sata_phy); + } break; default: @@ -760,6 +598,9 @@ static void ahci_imx_error_handler(struct ata_port *ap) ahci_error_handler(ap); + if (imxpriv->type == AHCI_IMX8QM) + return; + if (!(imxpriv->first_time) || ahci_imx_hotplug) return; @@ -986,65 +827,19 @@ static const struct scsi_host_template ahci_platform_sht = { static int imx8_sata_probe(struct device *dev, struct imx_ahci_priv *imxpriv) { - 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_gpiod = devm_gpiod_get_optional(dev, "clkreq", - GPIOD_OUT_LOW | GPIOD_FLAGS_BIT_NONEXCLUSIVE); - if (IS_ERR(imxpriv->clkreq_gpiod)) - return PTR_ERR(imxpriv->clkreq_gpiod); - if (imxpriv->clkreq_gpiod) - gpiod_set_consumer_name(imxpriv->clkreq_gpiod, "SATA CLKREQ"); - + imxpriv->sata_phy = devm_phy_get(dev, "sata-phy"); + if (IS_ERR(imxpriv->sata_phy)) + return dev_err_probe(dev, PTR_ERR(imxpriv->sata_phy), + "Failed to get sata_phy\n"); + + imxpriv->cali_phy0 = devm_phy_get(dev, "cali-phy0"); + if (IS_ERR(imxpriv->cali_phy0)) + return dev_err_probe(dev, PTR_ERR(imxpriv->cali_phy0), + "Failed to get cali_phy0\n"); + imxpriv->cali_phy1 = devm_phy_get(dev, "cali-phy1"); + if (IS_ERR(imxpriv->cali_phy1)) + return dev_err_probe(dev, PTR_ERR(imxpriv->cali_phy1), + "Failed to get cali_phy1\n"); return 0; }
Clean up code by using PHY interface provided by the PHY driver under PHY subsystem(drivers/phy/freescale/phy-fsl-imx8qm-hsio.c). Signed-off-by: Richard Zhu <hongxing.zhu@nxp.com> --- drivers/ata/ahci_imx.c | 365 +++++++++-------------------------------- 1 file changed, 80 insertions(+), 285 deletions(-)