From 6e877fedb1cff0f4a0988d30418ad87abaefafcb Mon Sep 17 00:00:00 2001 From: Lee Jones Date: Wed, 9 Jul 2014 12:41:12 +0100 Subject: phy: miphy365x: Provide support for the MiPHY356x Generic PHY The MiPHY365x is a Generic PHY which can serve various SATA or PCIe devices. It has 2 ports which it can use for either; both SATA, both PCIe or one of each in any configuration. Acked-by: Mark Rutland Signed-off-by: Alexandre Torgue Signed-off-by: Lee Jones Signed-off-by: Kishon Vijay Abraham I --- drivers/phy/phy-miphy365x.c | 616 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 616 insertions(+) create mode 100644 drivers/phy/phy-miphy365x.c (limited to 'drivers/phy/phy-miphy365x.c') diff --git a/drivers/phy/phy-miphy365x.c b/drivers/phy/phy-miphy365x.c new file mode 100644 index 000000000000..65ecd04da9bc --- /dev/null +++ b/drivers/phy/phy-miphy365x.c @@ -0,0 +1,616 @@ +/* + * Copyright (C) 2014 STMicroelectronics – All Rights Reserved + * + * STMicroelectronics PHY driver MiPHY365 (for SoC STiH416). + * + * Authors: Alexandre Torgue + * Lee Jones + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2, as + * published by the Free Software Foundation. + * + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +#define HFC_TIMEOUT 100 + +#define SYSCFG_2521 0x824 +#define SYSCFG_2522 0x828 +#define SYSCFG_PCIE_SATA_MASK BIT(1) +#define SYSCFG_PCIE_SATA_POS 1 + +/* MiPHY365x register definitions */ +#define RESET_REG 0x00 +#define RST_PLL BIT(1) +#define RST_PLL_CAL BIT(2) +#define RST_RX BIT(4) +#define RST_MACRO BIT(7) + +#define STATUS_REG 0x01 +#define IDLL_RDY BIT(0) +#define PLL_RDY BIT(1) +#define DES_BIT_LOCK BIT(2) +#define DES_SYMBOL_LOCK BIT(3) + +#define CTRL_REG 0x02 +#define TERM_EN BIT(0) +#define PCI_EN BIT(2) +#define DES_BIT_LOCK_EN BIT(3) +#define TX_POL BIT(5) + +#define INT_CTRL_REG 0x03 + +#define BOUNDARY1_REG 0x10 +#define SPDSEL_SEL BIT(0) + +#define BOUNDARY3_REG 0x12 +#define TX_SPDSEL_GEN1_VAL 0 +#define TX_SPDSEL_GEN2_VAL 0x01 +#define TX_SPDSEL_GEN3_VAL 0x02 +#define RX_SPDSEL_GEN1_VAL 0 +#define RX_SPDSEL_GEN2_VAL (0x01 << 3) +#define RX_SPDSEL_GEN3_VAL (0x02 << 3) + +#define PCIE_REG 0x16 + +#define BUF_SEL_REG 0x20 +#define CONF_GEN_SEL_GEN3 0x02 +#define CONF_GEN_SEL_GEN2 0x01 +#define PD_VDDTFILTER BIT(4) + +#define TXBUF1_REG 0x21 +#define SWING_VAL 0x04 +#define SWING_VAL_GEN1 0x03 +#define PREEMPH_VAL (0x3 << 5) + +#define TXBUF2_REG 0x22 +#define TXSLEW_VAL 0x2 +#define TXSLEW_VAL_GEN1 0x4 + +#define RXBUF_OFFSET_CTRL_REG 0x23 + +#define RXBUF_REG 0x25 +#define SDTHRES_VAL 0x01 +#define EQ_ON3 (0x03 << 4) +#define EQ_ON1 (0x01 << 4) + +#define COMP_CTRL1_REG 0x40 +#define START_COMSR BIT(0) +#define START_COMZC BIT(1) +#define COMSR_DONE BIT(2) +#define COMZC_DONE BIT(3) +#define COMP_AUTO_LOAD BIT(4) + +#define COMP_CTRL2_REG 0x41 +#define COMP_2MHZ_RAT_GEN1 0x1e +#define COMP_2MHZ_RAT 0xf + +#define COMP_CTRL3_REG 0x42 +#define COMSR_COMP_REF 0x33 + +#define COMP_IDLL_REG 0x47 +#define COMZC_IDLL 0x2a + +#define PLL_CTRL1_REG 0x50 +#define PLL_START_CAL BIT(0) +#define BUF_EN BIT(2) +#define SYNCHRO_TX BIT(3) +#define SSC_EN BIT(6) +#define CONFIG_PLL BIT(7) + +#define PLL_CTRL2_REG 0x51 +#define BYPASS_PLL_CAL BIT(1) + +#define PLL_RAT_REG 0x52 + +#define PLL_SSC_STEP_MSB_REG 0x56 +#define PLL_SSC_STEP_MSB_VAL 0x03 + +#define PLL_SSC_STEP_LSB_REG 0x57 +#define PLL_SSC_STEP_LSB_VAL 0x63 + +#define PLL_SSC_PER_MSB_REG 0x58 +#define PLL_SSC_PER_MSB_VAL 0 + +#define PLL_SSC_PER_LSB_REG 0x59 +#define PLL_SSC_PER_LSB_VAL 0xf1 + +#define IDLL_TEST_REG 0x72 +#define START_CLK_HF BIT(6) + +#define DES_BITLOCK_REG 0x86 +#define BIT_LOCK_LEVEL 0x01 +#define BIT_LOCK_CNT_512 (0x03 << 5) + +static u8 ports[] = { MIPHY_PORT_0, MIPHY_PORT_1 }; + +struct miphy365x_phy { + struct phy *phy; + void __iomem *base; + void __iomem *sata; + void __iomem *pcie; + u8 type; + u8 port; +}; + +struct miphy365x_dev { + struct device *dev; + struct regmap *regmap; + struct mutex miphy_mutex; + struct miphy365x phys[ARRAY_SIZE(ports)]; + bool pcie_tx_pol_inv; + bool sata_tx_pol_inv; + u32 sata_gen; +}; + +/* + * These values are represented in Device tree. They are considered to be ABI + * and although they can be extended any existing values must not change. + */ +enum miphy_sata_gen { + SATA_GEN1 = 1, + SATA_GEN2, + SATA_GEN3 +}; + +static u8 rx_tx_spd[] = { + TX_SPDSEL_GEN1_VAL | RX_SPDSEL_GEN1_VAL, + TX_SPDSEL_GEN2_VAL | RX_SPDSEL_GEN2_VAL, + TX_SPDSEL_GEN3_VAL | RX_SPDSEL_GEN3_VAL +}; + +/* + * This function selects the system configuration, + * either two SATA, one SATA and one PCIe, or two PCIe lanes. + */ +static int miphy365x_set_path(struct miphy365x_phy *miphy_phy, + struct miphy365x_dev *miphy_dev) +{ + u8 config = miphy_phy->type | miphy_phy->port; + u32 mask = SYSCFG_PCIE_SATA_MASK; + u32 reg; + bool sata; + + switch (config) { + case MIPHY_SATA_PORT0: + reg = SYSCFG_2521; + sata = true; + break; + case MIPHY_PCIE_PORT1: + reg = SYSCFG_2522; + sata = false; + break; + default: + dev_err(miphy_dev->dev, "Configuration not supported\n"); + return -EINVAL; + } + + return regmap_update_bits(miphy_dev->regmap, reg, mask, + sata << SYSCFG_PCIE_SATA_POS); +} + +static int miphy365x_init_pcie_port(struct miphy365x_phy *miphy_phy, + struct miphy365x_dev *miphy_dev) +{ + u8 val; + + if (miphy_phy->pcie_tx_pol_inv) { + /* Invert Tx polarity and clear pci_txdetect_pol bit */ + val = TERM_EN | PCI_EN | DES_BIT_LOCK_EN | TX_POL; + writeb_relaxed(val, miphy_phy->base + CTRL_REG); + writeb_relaxed(0x00, miphy_phy->base + PCIE_REG); + } + + return 0; +} + +static inline int miphy365x_hfc_not_rdy(struct miphy365x_phy *miphy_phy, + struct miphy365x_dev *miphy_dev) +{ + unsigned long timeout = jiffies + msecs_to_jiffies(HFC_TIMEOUT); + u8 mask = IDLL_RDY | PLL_RDY; + u8 regval; + + do { + regval = readb_relaxed(miphy_phy->base + STATUS_REG); + if (!(regval & mask)) + return 0; + + usleep_range(2000, 2500); + } while (time_before(jiffies, timeout)); + + dev_err(miphy_dev->dev, "HFC ready timeout!\n"); + return -EBUSY; +} + +static inline int miphy365x_rdy(struct miphy365x_phy *miphy_phy, + struct miphy365x_dev *miphy_dev) +{ + unsigned long timeout = jiffies + msecs_to_jiffies(HFC_TIMEOUT); + u8 mask = IDLL_RDY | PLL_RDY; + u8 regval; + + do { + regval = readb_relaxed(miphy_phy->base + STATUS_REG); + if ((regval & mask) == mask) + return 0; + + usleep_range(2000, 2500); + } while (time_before(jiffies, timeout)); + + dev_err(miphy_dev->dev, "PHY not ready timeout!\n"); + return -EBUSY; +} + +static inline void miphy365x_set_comp(struct miphy365x_phy *miphy_phy, + struct miphy365x_dev *miphy_dev) +{ + u8 val, mask; + + if (miphy_dev->sata_gen == SATA_GEN1) + writeb_relaxed(COMP_2MHZ_RAT_GEN1, + miphy_phy->base + COMP_CTRL2_REG); + else + writeb_relaxed(COMP_2MHZ_RAT, + miphy_phy->base + COMP_CTRL2_REG); + + if (miphy_dev->sata_gen != SATA_GEN3) { + writeb_relaxed(COMSR_COMP_REF, + miphy_phy->base + COMP_CTRL3_REG); + /* + * Force VCO current to value defined by address 0x5A + * and disable PCIe100Mref bit + * Enable auto load compensation for pll_i_bias + */ + writeb_relaxed(BYPASS_PLL_CAL, miphy_phy->base + PLL_CTRL2_REG); + writeb_relaxed(COMZC_IDLL, miphy_phy->base + COMP_IDLL_REG); + } + + /* + * Force restart compensation and enable auto load + * for Comzc_Tx, Comzc_Rx and Comsr on macro + */ + val = START_COMSR | START_COMZC | COMP_AUTO_LOAD; + writeb_relaxed(val, miphy_phy->base + COMP_CTRL1_REG); + + mask = COMSR_DONE | COMZC_DONE; + while ((readb_relaxed(miphy_phy->base + COMP_CTRL1_REG) & mask) != mask) + cpu_relax(); +} + +static inline void miphy365x_set_ssc(struct miphy365x_phy *miphy_phy, + struct miphy365x_dev *miphy_dev) +{ + u8 val; + + /* + * SSC Settings. SSC will be enabled through Link + * SSC Ampl. = 0.4% + * SSC Freq = 31KHz + */ + writeb_relaxed(PLL_SSC_STEP_MSB_VAL, + miphy_phy->base + PLL_SSC_STEP_MSB_REG); + writeb_relaxed(PLL_SSC_STEP_LSB_VAL, + miphy_phy->base + PLL_SSC_STEP_LSB_REG); + writeb_relaxed(PLL_SSC_PER_MSB_VAL, + miphy_phy->base + PLL_SSC_PER_MSB_REG); + writeb_relaxed(PLL_SSC_PER_LSB_VAL, + miphy_phy->base + PLL_SSC_PER_LSB_REG); + + /* SSC Settings complete */ + if (miphy_dev->sata_gen == SATA_GEN1) { + val = PLL_START_CAL | BUF_EN | SYNCHRO_TX | CONFIG_PLL; + writeb_relaxed(val, miphy_phy->base + PLL_CTRL1_REG); + } else { + val = SSC_EN | PLL_START_CAL | BUF_EN | SYNCHRO_TX | CONFIG_PLL; + writeb_relaxed(val, miphy_phy->base + PLL_CTRL1_REG); + } +} + +static int miphy365x_init_sata_port(struct miphy365x_phy *miphy_phy, + struct miphy365x_dev *miphy_dev) +{ + int ret; + u8 val; + + /* + * Force PHY macro reset, PLL calibration reset, PLL reset + * and assert Deserializer Reset + */ + val = RST_PLL | RST_PLL_CAL | RST_RX | RST_MACRO; + writeb_relaxed(val, miphy_phy->base + RESET_REG); + + if (miphy_dev->sata_tx_pol_inv) + writeb_relaxed(TX_POL, miphy_phy->base + CTRL_REG); + + /* + * Force macro1 to use rx_lspd, tx_lspd + * Force Rx_Clock on first I-DLL phase + * Force Des in HP mode on macro, rx_lspd, tx_lspd for Gen2/3 + */ + writeb_relaxed(SPDSEL_SEL, miphy_phy->base + BOUNDARY1_REG); + writeb_relaxed(START_CLK_HF, miphy_phy->base + IDLL_TEST_REG); + val = rx_tx_spd[miphy_dev->sata_gen]; + writeb_relaxed(val, miphy_phy->base + BOUNDARY3_REG); + + /* Wait for HFC_READY = 0 */ + ret = miphy365x_hfc_not_rdy(miphy_phy, miphy_dev); + if (ret) + return ret; + + /* Compensation Recalibration */ + miphy365x_set_comp(miphy_phy, miphy_dev); + + switch (miphy_dev->sata_gen) { + case SATA_GEN3: + /* + * TX Swing target 550-600mv peak to peak diff + * Tx Slew target 90-110ps rising/falling time + * Rx Eq ON3, Sigdet threshold SDTH1 + */ + val = PD_VDDTFILTER | CONF_GEN_SEL_GEN3; + writeb_relaxed(val, miphy_phy->base + BUF_SEL_REG); + val = SWING_VAL | PREEMPH_VAL; + writeb_relaxed(val, miphy_phy->base + TXBUF1_REG); + writeb_relaxed(TXSLEW_VAL, miphy_phy->base + TXBUF2_REG); + writeb_relaxed(0x00, miphy_phy->base + RXBUF_OFFSET_CTRL_REG); + val = SDTHRES_VAL | EQ_ON3; + writeb_relaxed(val, miphy_phy->base + RXBUF_REG); + break; + case SATA_GEN2: + /* + * conf gen sel=0x1 to program Gen2 banked registers + * VDDT filter ON + * Tx Swing target 550-600mV peak-to-peak diff + * Tx Slew target 90-110 ps rising/falling time + * RX Equalization ON1, Sigdet threshold SDTH1 + */ + writeb_relaxed(CONF_GEN_SEL_GEN2, + miphy_phy->base + BUF_SEL_REG); + writeb_relaxed(SWING_VAL, miphy_phy->base + TXBUF1_REG); + writeb_relaxed(TXSLEW_VAL, miphy_phy->base + TXBUF2_REG); + val = SDTHRES_VAL | EQ_ON1; + writeb_relaxed(val, miphy_phy->base + RXBUF_REG); + break; + case SATA_GEN1: + /* + * conf gen sel = 00b to program Gen1 banked registers + * VDDT filter ON + * Tx Swing target 500-550mV peak-to-peak diff + * Tx Slew target120-140 ps rising/falling time + */ + writeb_relaxed(PD_VDDTFILTER, miphy_phy->base + BUF_SEL_REG); + writeb_relaxed(SWING_VAL_GEN1, miphy_phy->base + TXBUF1_REG); + writeb_relaxed(TXSLEW_VAL_GEN1, miphy_phy->base + TXBUF2_REG); + break; + default: + break; + } + + /* Force Macro1 in partial mode & release pll cal reset */ + writeb_relaxed(RST_RX, miphy_phy->base + RESET_REG); + usleep_range(100, 150); + + miphy365x_set_ssc(miphy_phy, miphy_dev); + + /* Wait for phy_ready */ + ret = miphy365x_rdy(miphy_phy, miphy_dev); + if (ret) + return ret; + + /* + * Enable macro1 to use rx_lspd & tx_lspd + * Release Rx_Clock on first I-DLL phase on macro1 + * Assert deserializer reset + * des_bit_lock_en is set + * bit lock detection strength + * Deassert deserializer reset + */ + writeb_relaxed(0x00, miphy_phy->base + BOUNDARY1_REG); + writeb_relaxed(0x00, miphy_phy->base + IDLL_TEST_REG); + writeb_relaxed(RST_RX, miphy_phy->base + RESET_REG); + val = miphy_dev->sata_tx_pol_inv ? + (TX_POL | DES_BIT_LOCK_EN) : DES_BIT_LOCK_EN; + writeb_relaxed(val, miphy_phy->base + CTRL_REG); + + val = BIT_LOCK_CNT_512 | BIT_LOCK_LEVEL; + writeb_relaxed(val, miphy_phy->base + DES_BITLOCK_REG); + writeb_relaxed(0x00, miphy_phy->base + RESET_REG); + + return 0; +} + +static int miphy365x_init(struct phy *phy) +{ + struct miphy365x_phy *miphy_phy = phy_get_drvdata(phy); + struct miphy365x_dev *miphy_dev = dev_get_drvdata(phy->dev.parent); + int ret = 0; + + mutex_lock(&miphy_dev->miphy_mutex); + + ret = miphy365x_set_path(miphy_phy, miphy_dev); + if (ret) { + mutex_unlock(&miphy_dev->miphy_mutex); + return ret; + } + + /* Initialise Miphy for PCIe or SATA */ + if (miphy_phy->type == MIPHY_TYPE_PCIE) + ret = miphy365x_init_pcie_port(miphy_phy, miphy_dev); + else + ret = miphy365x_init_sata_port(miphy_phy, miphy_dev); + + mutex_unlock(&miphy_dev->miphy_mutex); + + return ret; +} + +static struct phy *miphy365x_xlate(struct device *dev, + struct of_phandle_args *args) +{ + struct miphy365x_dev *state = dev_get_drvdata(dev); + u8 port, type; + + if (args->count != 2) { + dev_err(dev, "Invalid number of cells in 'phy' property\n"); + return ERR_PTR(-EINVAL); + } + + if (args->args[0] & 0xFFFFFF00 || args->args[1] & 0xFFFFFF00) { + dev_err(dev, "Unsupported flags set in 'phy' property\n"); + return ERR_PTR(-EINVAL); + } + + port = args->args[0]; + type = args->args[1]; + + if (WARN_ON(port >= ARRAY_SIZE(ports))) + return ERR_PTR(-EINVAL); + + if (type == MIPHY_TYPE_SATA) + state->phys[port].base = state->phys[port].sata; + else if (type == MIPHY_TYPE_PCIE) + state->phys[port].base = state->phys[port].pcie; + else { + WARN(1, "Invalid type specified in DT"); + return ERR_PTR(-EINVAL); + } + + state->phys[port].type = type; + + return state->phys[port].phy; +} + +static struct phy_ops miphy365x_ops = { + .init = miphy365x_init, + .owner = THIS_MODULE, +}; + +static int miphy365x_get_base_addr(struct platform_device *pdev, + struct miphy365x_phy *phy, u8 port) +{ + struct resource *res; + char type[6]; + + sprintf(type, "sata%d", port); + + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, type); + phy->sata = devm_ioremap_resource(&pdev->dev, res)); + if (!phy->sata) + return -ENOMEM; + + sprintf(type, "pcie%d", port); + + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, type); + phy->pcie = devm_ioremap_resource(&pdev->dev, res)); + if (!phy->pcie) + return -ENOMEM; + + return 0; +} + +static int miphy365x_of_probe(struct device_node *np, + struct miphy365x_dev *phy_dev) +{ + phy_dev->regmap = syscon_regmap_lookup_by_phandle(np, "st,syscfg"); + if (IS_ERR(phy_dev->regmap)) { + dev_err(phy_dev->dev, "No syscfg phandle specified\n"); + return PTR_ERR(phy_dev->regmap); + } + + of_property_read_u32(np, "st,sata-gen", &phy_dev->sata_gen); + if (!phy_dev->sata_gen) + phy_dev->sata_gen = SATA_GEN1; + + phy_dev->pcie_tx_pol_inv = + of_property_read_bool(np, "st,pcie-tx-pol-inv"); + + phy_dev->sata_tx_pol_inv = + of_property_read_bool(np, "st,sata-tx-pol-inv"); + + return 0; +} + +static int miphy365x_probe(struct platform_device *pdev) +{ + struct device_node *np = pdev->dev.of_node; + struct miphy365x_dev *phy_dev; + struct device *dev = &pdev->dev; + struct phy_provider *provider; + u8 port; + int ret; + + phy_dev = devm_kzalloc(dev, sizeof(*phy_dev), GFP_KERNEL); + if (!phy_dev) + return -ENOMEM; + + ret = miphy365x_of_probe(np, phy_dev); + if (ret) + return ret; + + phy_dev->dev = dev; + + dev_set_drvdata(dev, phy_dev); + + mutex_init(&phy_dev->miphy_mutex); + + for (port = 0; port < ARRAY_SIZE(ports); port++) { + struct phy *phy; + + phy = devm_phy_create(dev, &miphy365x_ops, NULL); + if (IS_ERR(phy)) { + dev_err(dev, "failed to create PHY on port %d\n", port); + return PTR_ERR(phy); + } + + phy_dev->phys[port].phy = phy; + phy_dev->phys[port].port = port; + + ret = miphy365x_get_base_addr(pdev, + &phy_dev->phys[port], port); + if (ret) + return ret; + + phy_set_drvdata(phy, &phy_dev->phys[port]); + } + + provider = devm_of_phy_provider_register(dev, miphy365x_xlate); + if (IS_ERR(provider)) + return PTR_ERR(provider); + + return 0; +} + +static const struct of_device_id miphy365x_of_match[] = { + { .compatible = "st,miphy365x-phy", }, + { }, +}; +MODULE_DEVICE_TABLE(of, miphy365x_of_match); + +static struct platform_driver miphy365x_driver = { + .probe = miphy365x_probe, + .driver = { + .name = "miphy365x-phy", + .owner = THIS_MODULE, + .of_match_table = miphy365x_of_match, + } +}; +module_platform_driver(miphy365x_driver); + +MODULE_AUTHOR("Alexandre Torgue "); +MODULE_DESCRIPTION("STMicroelectronics miphy365x driver"); +MODULE_LICENSE("GPL v2"); -- cgit v1.2.3-70-g09d2 From 7ebdb52e192c4d496a9b3a87d47eba3eba3e1fd4 Mon Sep 17 00:00:00 2001 From: Lee Jones Date: Wed, 9 Jul 2014 12:41:13 +0100 Subject: phy: miphy365x: Represent each PHY channel as a DT subnode This has the added advantages of being able to enable/disable each of the channels as simply as enabling/disabling the DT node. Suggested-by: Kishon Vijay Abraham I Signed-off-by: Lee Jones Signed-off-by: Kishon Vijay Abraham I --- drivers/phy/phy-miphy365x.c | 256 ++++++++++++++++++++++++-------------------- 1 file changed, 138 insertions(+), 118 deletions(-) (limited to 'drivers/phy/phy-miphy365x.c') diff --git a/drivers/phy/phy-miphy365x.c b/drivers/phy/phy-miphy365x.c index 65ecd04da9bc..e111baf187ce 100644 --- a/drivers/phy/phy-miphy365x.c +++ b/drivers/phy/phy-miphy365x.c @@ -18,6 +18,7 @@ #include #include #include +#include #include #include #include @@ -28,10 +29,8 @@ #define HFC_TIMEOUT 100 -#define SYSCFG_2521 0x824 -#define SYSCFG_2522 0x828 -#define SYSCFG_PCIE_SATA_MASK BIT(1) -#define SYSCFG_PCIE_SATA_POS 1 +#define SYSCFG_SELECT_SATA_MASK BIT(1) +#define SYSCFG_SELECT_SATA_POS 1 /* MiPHY365x register definitions */ #define RESET_REG 0x00 @@ -136,25 +135,21 @@ #define BIT_LOCK_LEVEL 0x01 #define BIT_LOCK_CNT_512 (0x03 << 5) -static u8 ports[] = { MIPHY_PORT_0, MIPHY_PORT_1 }; - struct miphy365x_phy { struct phy *phy; void __iomem *base; - void __iomem *sata; - void __iomem *pcie; + bool pcie_tx_pol_inv; + bool sata_tx_pol_inv; + u32 sata_gen; + u64 ctrlreg; u8 type; - u8 port; }; struct miphy365x_dev { struct device *dev; struct regmap *regmap; struct mutex miphy_mutex; - struct miphy365x phys[ARRAY_SIZE(ports)]; - bool pcie_tx_pol_inv; - bool sata_tx_pol_inv; - u32 sata_gen; + struct miphy365x_phy **phys; }; /* @@ -180,27 +175,12 @@ static u8 rx_tx_spd[] = { static int miphy365x_set_path(struct miphy365x_phy *miphy_phy, struct miphy365x_dev *miphy_dev) { - u8 config = miphy_phy->type | miphy_phy->port; - u32 mask = SYSCFG_PCIE_SATA_MASK; - u32 reg; - bool sata; - - switch (config) { - case MIPHY_SATA_PORT0: - reg = SYSCFG_2521; - sata = true; - break; - case MIPHY_PCIE_PORT1: - reg = SYSCFG_2522; - sata = false; - break; - default: - dev_err(miphy_dev->dev, "Configuration not supported\n"); - return -EINVAL; - } + bool sata = (miphy_phy->type == MIPHY_TYPE_SATA); - return regmap_update_bits(miphy_dev->regmap, reg, mask, - sata << SYSCFG_PCIE_SATA_POS); + return regmap_update_bits(miphy_dev->regmap, + (unsigned int)miphy_phy->ctrlreg, + SYSCFG_SELECT_SATA_MASK, + sata << SYSCFG_SELECT_SATA_POS); } static int miphy365x_init_pcie_port(struct miphy365x_phy *miphy_phy, @@ -261,14 +241,14 @@ static inline void miphy365x_set_comp(struct miphy365x_phy *miphy_phy, { u8 val, mask; - if (miphy_dev->sata_gen == SATA_GEN1) + if (miphy_phy->sata_gen == SATA_GEN1) writeb_relaxed(COMP_2MHZ_RAT_GEN1, miphy_phy->base + COMP_CTRL2_REG); else writeb_relaxed(COMP_2MHZ_RAT, miphy_phy->base + COMP_CTRL2_REG); - if (miphy_dev->sata_gen != SATA_GEN3) { + if (miphy_phy->sata_gen != SATA_GEN3) { writeb_relaxed(COMSR_COMP_REF, miphy_phy->base + COMP_CTRL3_REG); /* @@ -312,7 +292,7 @@ static inline void miphy365x_set_ssc(struct miphy365x_phy *miphy_phy, miphy_phy->base + PLL_SSC_PER_LSB_REG); /* SSC Settings complete */ - if (miphy_dev->sata_gen == SATA_GEN1) { + if (miphy_phy->sata_gen == SATA_GEN1) { val = PLL_START_CAL | BUF_EN | SYNCHRO_TX | CONFIG_PLL; writeb_relaxed(val, miphy_phy->base + PLL_CTRL1_REG); } else { @@ -334,7 +314,7 @@ static int miphy365x_init_sata_port(struct miphy365x_phy *miphy_phy, val = RST_PLL | RST_PLL_CAL | RST_RX | RST_MACRO; writeb_relaxed(val, miphy_phy->base + RESET_REG); - if (miphy_dev->sata_tx_pol_inv) + if (miphy_phy->sata_tx_pol_inv) writeb_relaxed(TX_POL, miphy_phy->base + CTRL_REG); /* @@ -344,7 +324,7 @@ static int miphy365x_init_sata_port(struct miphy365x_phy *miphy_phy, */ writeb_relaxed(SPDSEL_SEL, miphy_phy->base + BOUNDARY1_REG); writeb_relaxed(START_CLK_HF, miphy_phy->base + IDLL_TEST_REG); - val = rx_tx_spd[miphy_dev->sata_gen]; + val = rx_tx_spd[miphy_phy->sata_gen]; writeb_relaxed(val, miphy_phy->base + BOUNDARY3_REG); /* Wait for HFC_READY = 0 */ @@ -355,7 +335,7 @@ static int miphy365x_init_sata_port(struct miphy365x_phy *miphy_phy, /* Compensation Recalibration */ miphy365x_set_comp(miphy_phy, miphy_dev); - switch (miphy_dev->sata_gen) { + switch (miphy_phy->sata_gen) { case SATA_GEN3: /* * TX Swing target 550-600mv peak to peak diff @@ -423,7 +403,7 @@ static int miphy365x_init_sata_port(struct miphy365x_phy *miphy_phy, writeb_relaxed(0x00, miphy_phy->base + BOUNDARY1_REG); writeb_relaxed(0x00, miphy_phy->base + IDLL_TEST_REG); writeb_relaxed(RST_RX, miphy_phy->base + RESET_REG); - val = miphy_dev->sata_tx_pol_inv ? + val = miphy_phy->sata_tx_pol_inv ? (TX_POL | DES_BIT_LOCK_EN) : DES_BIT_LOCK_EN; writeb_relaxed(val, miphy_phy->base + CTRL_REG); @@ -459,40 +439,95 @@ static int miphy365x_init(struct phy *phy) return ret; } +int miphy365x_get_addr(struct device *dev, struct miphy365x_phy *miphy_phy, + int index) +{ + struct device_node *phynode = miphy_phy->phy->dev.of_node; + const char *name; + const __be32 *taddr; + int type = miphy_phy->type; + int ret; + + ret = of_property_read_string_index(phynode, "reg-names", index, &name); + if (ret) { + dev_err(dev, "no reg-names property not found\n"); + return ret; + } + + if (!strncmp(name, "syscfg", 6)) { + taddr = of_get_address(phynode, index, NULL, NULL); + if (!taddr) { + dev_err(dev, "failed to fetch syscfg address\n"); + return -EINVAL; + } + + miphy_phy->ctrlreg = of_translate_address(phynode, taddr); + if (miphy_phy->ctrlreg == OF_BAD_ADDR) { + dev_err(dev, "failed to translate syscfg address\n"); + return -EINVAL; + } + + return 0; + } + + if (!((!strncmp(name, "sata", 4) && type == MIPHY_TYPE_SATA) || + (!strncmp(name, "pcie", 4) && type == MIPHY_TYPE_PCIE))) + return 0; + + miphy_phy->base = of_iomap(phynode, index); + if (!miphy_phy->base) { + dev_err(dev, "Failed to map %s\n", phynode->full_name); + return -EINVAL; + } + + return 0; +} + static struct phy *miphy365x_xlate(struct device *dev, struct of_phandle_args *args) { - struct miphy365x_dev *state = dev_get_drvdata(dev); - u8 port, type; + struct miphy365x_dev *miphy_dev = dev_get_drvdata(dev); + struct miphy365x_phy *miphy_phy = NULL; + struct device_node *phynode = args->np; + int ret, index; + + if (!of_device_is_available(phynode)) { + dev_warn(dev, "Requested PHY is disabled\n"); + return ERR_PTR(-ENODEV); + } - if (args->count != 2) { + if (args->args_count != 1) { dev_err(dev, "Invalid number of cells in 'phy' property\n"); return ERR_PTR(-EINVAL); } - if (args->args[0] & 0xFFFFFF00 || args->args[1] & 0xFFFFFF00) { - dev_err(dev, "Unsupported flags set in 'phy' property\n"); + for (index = 0; index < of_get_child_count(dev->of_node); index++) + if (phynode == miphy_dev->phys[index]->phy->dev.of_node) { + miphy_phy = miphy_dev->phys[index]; + break; + } + + if (!miphy_phy) { + dev_err(dev, "Failed to find appropriate phy\n"); return ERR_PTR(-EINVAL); } - port = args->args[0]; - type = args->args[1]; - - if (WARN_ON(port >= ARRAY_SIZE(ports))) - return ERR_PTR(-EINVAL); + miphy_phy->type = args->args[0]; - if (type == MIPHY_TYPE_SATA) - state->phys[port].base = state->phys[port].sata; - else if (type == MIPHY_TYPE_PCIE) - state->phys[port].base = state->phys[port].pcie; - else { - WARN(1, "Invalid type specified in DT"); + if (!(miphy_phy->type == MIPHY_TYPE_SATA || + miphy_phy->type == MIPHY_TYPE_PCIE)) { + dev_err(dev, "Unsupported device type: %d\n", miphy_phy->type); return ERR_PTR(-EINVAL); } - state->phys[port].type = type; + /* Each port handles SATA and PCIE - third entry is always sysconf. */ + for (index = 0; index < 3; index++) { + ret = miphy365x_get_addr(dev, miphy_phy, index); + if (ret < 0) + return ERR_PTR(ret); + } - return state->phys[port].phy; + return miphy_phy->phy; } static struct phy_ops miphy365x_ops = { @@ -500,95 +535,80 @@ static struct phy_ops miphy365x_ops = { .owner = THIS_MODULE, }; -static int miphy365x_get_base_addr(struct platform_device *pdev, - struct miphy365x_phy *phy, u8 port) +static int miphy365x_of_probe(struct device_node *phynode, + struct miphy365x_phy *miphy_phy) { - struct resource *res; - char type[6]; + of_property_read_u32(phynode, "st,sata-gen", &miphy_phy->sata_gen); + if (!miphy_phy->sata_gen) + miphy_phy->sata_gen = SATA_GEN1; - sprintf(type, "sata%d", port); + miphy_phy->pcie_tx_pol_inv = + of_property_read_bool(phynode, "st,pcie-tx-pol-inv"); - res = platform_get_resource_byname(pdev, IORESOURCE_MEM, type); - phy->sata = devm_ioremap_resource(&pdev->dev, res)); - if (!phy->sata) - return -ENOMEM; - - sprintf(type, "pcie%d", port); - - res = platform_get_resource_byname(pdev, IORESOURCE_MEM, type); - phy->pcie = devm_ioremap_resource(&pdev->dev, res)); - if (!phy->pcie) - return -ENOMEM; - - return 0; -} - -static int miphy365x_of_probe(struct device_node *np, - struct miphy365x_dev *phy_dev) -{ - phy_dev->regmap = syscon_regmap_lookup_by_phandle(np, "st,syscfg"); - if (IS_ERR(phy_dev->regmap)) { - dev_err(phy_dev->dev, "No syscfg phandle specified\n"); - return PTR_ERR(phy_dev->regmap); - } - - of_property_read_u32(np, "st,sata-gen", &phy_dev->sata_gen); - if (!phy_dev->sata_gen) - phy_dev->sata_gen = SATA_GEN1; - - phy_dev->pcie_tx_pol_inv = - of_property_read_bool(np, "st,pcie-tx-pol-inv"); - - phy_dev->sata_tx_pol_inv = - of_property_read_bool(np, "st,sata-tx-pol-inv"); + miphy_phy->sata_tx_pol_inv = + of_property_read_bool(phynode, "st,sata-tx-pol-inv"); return 0; } static int miphy365x_probe(struct platform_device *pdev) { - struct device_node *np = pdev->dev.of_node; - struct miphy365x_dev *phy_dev; - struct device *dev = &pdev->dev; + struct device_node *child, *np = pdev->dev.of_node; + struct miphy365x_dev *miphy_dev; struct phy_provider *provider; - u8 port; + struct phy *phy; + int chancount, port = 0; int ret; - phy_dev = devm_kzalloc(dev, sizeof(*phy_dev), GFP_KERNEL); - if (!phy_dev) + miphy_dev = devm_kzalloc(&pdev->dev, sizeof(*miphy_dev), GFP_KERNEL); + if (!miphy_dev) return -ENOMEM; - ret = miphy365x_of_probe(np, phy_dev); - if (ret) - return ret; + chancount = of_get_child_count(np); + miphy_dev->phys = devm_kzalloc(&pdev->dev, sizeof(phy) * chancount, + GFP_KERNEL); + if (!miphy_dev->phys) + return -ENOMEM; + + miphy_dev->regmap = syscon_regmap_lookup_by_phandle(np, "st,syscfg"); + if (IS_ERR(miphy_dev->regmap)) { + dev_err(miphy_dev->dev, "No syscfg phandle specified\n"); + return PTR_ERR(miphy_dev->regmap); + } + + miphy_dev->dev = &pdev->dev; + + dev_set_drvdata(&pdev->dev, miphy_dev); - phy_dev->dev = dev; + mutex_init(&miphy_dev->miphy_mutex); - dev_set_drvdata(dev, phy_dev); + for_each_child_of_node(np, child) { + struct miphy365x_phy *miphy_phy; - mutex_init(&phy_dev->miphy_mutex); + miphy_phy = devm_kzalloc(&pdev->dev, sizeof(*miphy_phy), + GFP_KERNEL); + if (!miphy_phy) + return -ENOMEM; - for (port = 0; port < ARRAY_SIZE(ports); port++) { - struct phy *phy; + miphy_dev->phys[port] = miphy_phy; - phy = devm_phy_create(dev, &miphy365x_ops, NULL); + phy = devm_phy_create(&pdev->dev, child, &miphy365x_ops, NULL); if (IS_ERR(phy)) { - dev_err(dev, "failed to create PHY on port %d\n", port); + dev_err(&pdev->dev, "failed to create PHY\n"); return PTR_ERR(phy); } - phy_dev->phys[port].phy = phy; - phy_dev->phys[port].port = port; + miphy_dev->phys[port]->phy = phy; - ret = miphy365x_get_base_addr(pdev, - &phy_dev->phys[port], port); + ret = miphy365x_of_probe(child, miphy_phy); if (ret) return ret; - phy_set_drvdata(phy, &phy_dev->phys[port]); + phy_set_drvdata(phy, miphy_dev->phys[port]); + port++; } - provider = devm_of_phy_provider_register(dev, miphy365x_xlate); + provider = devm_of_phy_provider_register(&pdev->dev, miphy365x_xlate); if (IS_ERR(provider)) return PTR_ERR(provider); -- cgit v1.2.3-70-g09d2