| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Swapnil Jakhade | 7232 | 84.66% | 10 | 83.33% |
| Scott Telford | 1309 | 15.32% | 1 | 8.33% |
| Yuti Amonkar | 1 | 0.01% | 1 | 8.33% |
| Total | 8542 | 12 |
// SPDX-License-Identifier: GPL-2.0-only /* * Cadence Torrent SD0801 PHY driver. * * Copyright 2018 Cadence Design Systems, Inc. * */ #include <dt-bindings/phy/phy.h> #include <linux/clk.h> #include <linux/delay.h> #include <linux/err.h> #include <linux/io.h> #include <linux/iopoll.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/of.h> #include <linux/of_address.h> #include <linux/of_device.h> #include <linux/phy/phy.h> #include <linux/platform_device.h> #include <linux/reset.h> #include <linux/regmap.h> #define REF_CLK_19_2MHz 19200000 #define REF_CLK_25MHz 25000000 #define DEFAULT_NUM_LANES 4 #define MAX_NUM_LANES 4 #define DEFAULT_MAX_BIT_RATE 8100 /* in Mbps */ #define POLL_TIMEOUT_US 5000 #define TORRENT_COMMON_CDB_OFFSET 0x0 #define TORRENT_TX_LANE_CDB_OFFSET(ln, block_offset, reg_offset) \ ((0x4000 << (block_offset)) + \ (((ln) << 9) << (reg_offset))) #define TORRENT_RX_LANE_CDB_OFFSET(ln, block_offset, reg_offset) \ ((0x8000 << (block_offset)) + \ (((ln) << 9) << (reg_offset))) #define TORRENT_PHY_PCS_COMMON_OFFSET(block_offset) \ (0xC000 << (block_offset)) #define TORRENT_PHY_PMA_COMMON_OFFSET(block_offset) \ (0xE000 << (block_offset)) #define TORRENT_DPTX_PHY_OFFSET 0x0 /* * register offsets from DPTX PHY register block base (i.e MHDP * register base + 0x30a00) */ #define PHY_AUX_CTRL 0x04 #define PHY_RESET 0x20 #define PMA_TX_ELEC_IDLE_MASK 0xF0U #define PMA_TX_ELEC_IDLE_SHIFT 4 #define PHY_L00_RESET_N_MASK 0x01U #define PHY_PMA_XCVR_PLLCLK_EN 0x24 #define PHY_PMA_XCVR_PLLCLK_EN_ACK 0x28 #define PHY_PMA_XCVR_POWER_STATE_REQ 0x2c #define PHY_POWER_STATE_LN_0 0x0000 #define PHY_POWER_STATE_LN_1 0x0008 #define PHY_POWER_STATE_LN_2 0x0010 #define PHY_POWER_STATE_LN_3 0x0018 #define PMA_XCVR_POWER_STATE_REQ_LN_MASK 0x3FU #define PHY_PMA_XCVR_POWER_STATE_ACK 0x30 #define PHY_PMA_CMN_READY 0x34 /* * register offsets from SD0801 PHY register block base (i.e MHDP * register base + 0x500000) */ #define CMN_SSM_BANDGAP_TMR 0x0021U #define CMN_SSM_BIAS_TMR 0x0022U #define CMN_PLLSM0_PLLPRE_TMR 0x002AU #define CMN_PLLSM0_PLLLOCK_TMR 0x002CU #define CMN_PLLSM1_PLLPRE_TMR 0x0032U #define CMN_PLLSM1_PLLLOCK_TMR 0x0034U #define CMN_BGCAL_INIT_TMR 0x0064U #define CMN_BGCAL_ITER_TMR 0x0065U #define CMN_IBCAL_INIT_TMR 0x0074U #define CMN_PLL0_VCOCAL_TCTRL 0x0082U #define CMN_PLL0_VCOCAL_INIT_TMR 0x0084U #define CMN_PLL0_VCOCAL_ITER_TMR 0x0085U #define CMN_PLL0_VCOCAL_REFTIM_START 0x0086U #define CMN_PLL0_VCOCAL_PLLCNT_START 0x0088U #define CMN_PLL0_INTDIV_M0 0x0090U #define CMN_PLL0_FRACDIVL_M0 0x0091U #define CMN_PLL0_FRACDIVH_M0 0x0092U #define CMN_PLL0_HIGH_THR_M0 0x0093U #define CMN_PLL0_DSM_DIAG_M0 0x0094U #define CMN_PLL0_SS_CTRL1_M0 0x0098U #define CMN_PLL0_SS_CTRL2_M0 0x0099U #define CMN_PLL0_SS_CTRL3_M0 0x009AU #define CMN_PLL0_SS_CTRL4_M0 0x009BU #define CMN_PLL0_LOCK_REFCNT_START 0x009CU #define CMN_PLL0_LOCK_PLLCNT_START 0x009EU #define CMN_PLL0_LOCK_PLLCNT_THR 0x009FU #define CMN_PLL1_VCOCAL_TCTRL 0x00C2U #define CMN_PLL1_VCOCAL_INIT_TMR 0x00C4U #define CMN_PLL1_VCOCAL_ITER_TMR 0x00C5U #define CMN_PLL1_VCOCAL_REFTIM_START 0x00C6U #define CMN_PLL1_VCOCAL_PLLCNT_START 0x00C8U #define CMN_PLL1_INTDIV_M0 0x00D0U #define CMN_PLL1_FRACDIVL_M0 0x00D1U #define CMN_PLL1_FRACDIVH_M0 0x00D2U #define CMN_PLL1_HIGH_THR_M0 0x00D3U #define CMN_PLL1_DSM_DIAG_M0 0x00D4U #define CMN_PLL1_SS_CTRL1_M0 0x00D8U #define CMN_PLL1_SS_CTRL2_M0 0x00D9U #define CMN_PLL1_SS_CTRL3_M0 0x00DAU #define CMN_PLL1_SS_CTRL4_M0 0x00DBU #define CMN_PLL1_LOCK_REFCNT_START 0x00DCU #define CMN_PLL1_LOCK_PLLCNT_START 0x00DEU #define CMN_PLL1_LOCK_PLLCNT_THR 0x00DFU #define CMN_TXPUCAL_INIT_TMR 0x0104U #define CMN_TXPUCAL_ITER_TMR 0x0105U #define CMN_TXPDCAL_INIT_TMR 0x010CU #define CMN_TXPDCAL_ITER_TMR 0x010DU #define CMN_RXCAL_INIT_TMR 0x0114U #define CMN_RXCAL_ITER_TMR 0x0115U #define CMN_SD_CAL_INIT_TMR 0x0124U #define CMN_SD_CAL_ITER_TMR 0x0125U #define CMN_SD_CAL_REFTIM_START 0x0126U #define CMN_SD_CAL_PLLCNT_START 0x0128U #define CMN_PDIAG_PLL0_CTRL_M0 0x01A0U #define CMN_PDIAG_PLL0_CLK_SEL_M0 0x01A1U #define CMN_PDIAG_PLL0_CP_PADJ_M0 0x01A4U #define CMN_PDIAG_PLL0_CP_IADJ_M0 0x01A5U #define CMN_PDIAG_PLL0_FILT_PADJ_M0 0x01A6U #define CMN_PDIAG_PLL0_CP_PADJ_M1 0x01B4U #define CMN_PDIAG_PLL0_CP_IADJ_M1 0x01B5U #define CMN_PDIAG_PLL1_CTRL_M0 0x01C0U #define CMN_PDIAG_PLL1_CLK_SEL_M0 0x01C1U #define CMN_PDIAG_PLL1_CP_PADJ_M0 0x01C4U #define CMN_PDIAG_PLL1_CP_IADJ_M0 0x01C5U #define CMN_PDIAG_PLL1_FILT_PADJ_M0 0x01C6U /* PMA TX Lane registers */ #define TX_TXCC_CTRL 0x0040U #define TX_TXCC_CPOST_MULT_00 0x004CU #define TX_TXCC_MGNFS_MULT_000 0x0050U #define DRV_DIAG_TX_DRV 0x00C6U #define XCVR_DIAG_PLLDRC_CTRL 0x00E5U #define XCVR_DIAG_HSCLK_SEL 0x00E6U #define XCVR_DIAG_HSCLK_DIV 0x00E7U #define XCVR_DIAG_BIDI_CTRL 0x00EAU #define TX_PSC_A0 0x0100U #define TX_PSC_A2 0x0102U #define TX_PSC_A3 0x0103U #define TX_RCVDET_ST_TMR 0x0123U #define TX_DIAG_ACYA 0x01E7U #define TX_DIAG_ACYA_HBDC_MASK 0x0001U /* PMA RX Lane registers */ #define RX_PSC_A0 0x0000U #define RX_PSC_A2 0x0002U #define RX_PSC_A3 0x0003U #define RX_PSC_CAL 0x0006U #define RX_REE_GCSM1_CTRL 0x0108U #define RX_REE_GCSM2_CTRL 0x0110U #define RX_REE_PERGCSM_CTRL 0x0118U /* PHY PCS common registers */ #define PHY_PLL_CFG 0x000EU /* PHY PMA common registers */ #define PHY_PMA_CMN_CTRL2 0x0001U #define PHY_PMA_PLL_RAW_CTRL 0x0003U static const struct reg_field phy_pll_cfg = REG_FIELD(PHY_PLL_CFG, 0, 1); static const struct reg_field phy_pma_cmn_ctrl_2 = REG_FIELD(PHY_PMA_CMN_CTRL2, 0, 7); static const struct reg_field phy_pma_pll_raw_ctrl = REG_FIELD(PHY_PMA_PLL_RAW_CTRL, 0, 1); static const struct reg_field phy_reset_ctrl = REG_FIELD(PHY_RESET, 8, 8); static const struct of_device_id cdns_torrent_phy_of_match[]; struct cdns_torrent_inst { struct phy *phy; u32 mlane; u32 phy_type; u32 num_lanes; struct reset_control *lnk_rst; }; struct cdns_torrent_phy { void __iomem *base; /* DPTX registers base */ void __iomem *sd_base; /* SD0801 registers base */ u32 max_bit_rate; /* Maximum link bit rate to use (in Mbps) */ struct reset_control *phy_rst; struct device *dev; struct clk *clk; unsigned long ref_clk_rate; struct cdns_torrent_inst phys[MAX_NUM_LANES]; int nsubnodes; struct regmap *regmap; struct regmap *regmap_common_cdb; struct regmap *regmap_phy_pcs_common_cdb; struct regmap *regmap_phy_pma_common_cdb; struct regmap *regmap_tx_lane_cdb[MAX_NUM_LANES]; struct regmap *regmap_rx_lane_cdb[MAX_NUM_LANES]; struct regmap *regmap_dptx_phy_reg; struct regmap_field *phy_pll_cfg; struct regmap_field *phy_pma_cmn_ctrl_2; struct regmap_field *phy_pma_pll_raw_ctrl; struct regmap_field *phy_reset_ctrl; }; enum phy_powerstate { POWERSTATE_A0 = 0, /* Powerstate A1 is unused */ POWERSTATE_A2 = 2, POWERSTATE_A3 = 3, }; static int cdns_torrent_dp_init(struct phy *phy); static int cdns_torrent_dp_exit(struct phy *phy); static int cdns_torrent_dp_run(struct cdns_torrent_phy *cdns_phy, u32 num_lanes); static int cdns_torrent_dp_wait_pma_cmn_ready(struct cdns_torrent_phy *cdns_phy); static void cdns_torrent_dp_pma_cfg(struct cdns_torrent_phy *cdns_phy, struct cdns_torrent_inst *inst); static void cdns_torrent_dp_pma_cmn_cfg_19_2mhz(struct cdns_torrent_phy *cdns_phy); static void cdns_torrent_dp_pma_cmn_vco_cfg_19_2mhz(struct cdns_torrent_phy *cdns_phy, u32 rate, bool ssc); static void cdns_torrent_dp_pma_cmn_cfg_25mhz(struct cdns_torrent_phy *cdns_phy); static void cdns_torrent_dp_pma_cmn_vco_cfg_25mhz(struct cdns_torrent_phy *cdns_phy, u32 rate, bool ssc); static void cdns_torrent_dp_pma_lane_cfg(struct cdns_torrent_phy *cdns_phy, unsigned int lane); static void cdns_torrent_dp_pma_cmn_rate(struct cdns_torrent_phy *cdns_phy, u32 rate, u32 num_lanes); static int cdns_torrent_dp_configure(struct phy *phy, union phy_configure_opts *opts); static int cdns_torrent_dp_set_power_state(struct cdns_torrent_phy *cdns_phy, u32 num_lanes, enum phy_powerstate powerstate); static int cdns_torrent_phy_on(struct phy *phy); static int cdns_torrent_phy_off(struct phy *phy); static const struct phy_ops cdns_torrent_phy_ops = { .init = cdns_torrent_dp_init, .exit = cdns_torrent_dp_exit, .configure = cdns_torrent_dp_configure, .power_on = cdns_torrent_phy_on, .power_off = cdns_torrent_phy_off, .owner = THIS_MODULE, }; struct cdns_torrent_data { u8 block_offset_shift; u8 reg_offset_shift; }; struct cdns_regmap_cdb_context { struct device *dev; void __iomem *base; u8 reg_offset_shift; }; static int cdns_regmap_write(void *context, unsigned int reg, unsigned int val) { struct cdns_regmap_cdb_context *ctx = context; u32 offset = reg << ctx->reg_offset_shift; writew(val, ctx->base + offset); return 0; } static int cdns_regmap_read(void *context, unsigned int reg, unsigned int *val) { struct cdns_regmap_cdb_context *ctx = context; u32 offset = reg << ctx->reg_offset_shift; *val = readw(ctx->base + offset); return 0; } static int cdns_regmap_dptx_write(void *context, unsigned int reg, unsigned int val) { struct cdns_regmap_cdb_context *ctx = context; u32 offset = reg; writel(val, ctx->base + offset); return 0; } static int cdns_regmap_dptx_read(void *context, unsigned int reg, unsigned int *val) { struct cdns_regmap_cdb_context *ctx = context; u32 offset = reg; *val = readl(ctx->base + offset); return 0; } #define TORRENT_TX_LANE_CDB_REGMAP_CONF(n) \ { \ .name = "torrent_tx_lane" n "_cdb", \ .reg_stride = 1, \ .fast_io = true, \ .reg_write = cdns_regmap_write, \ .reg_read = cdns_regmap_read, \ } #define TORRENT_RX_LANE_CDB_REGMAP_CONF(n) \ { \ .name = "torrent_rx_lane" n "_cdb", \ .reg_stride = 1, \ .fast_io = true, \ .reg_write = cdns_regmap_write, \ .reg_read = cdns_regmap_read, \ } static struct regmap_config cdns_torrent_tx_lane_cdb_config[] = { TORRENT_TX_LANE_CDB_REGMAP_CONF("0"), TORRENT_TX_LANE_CDB_REGMAP_CONF("1"), TORRENT_TX_LANE_CDB_REGMAP_CONF("2"), TORRENT_TX_LANE_CDB_REGMAP_CONF("3"), }; static struct regmap_config cdns_torrent_rx_lane_cdb_config[] = { TORRENT_RX_LANE_CDB_REGMAP_CONF("0"), TORRENT_RX_LANE_CDB_REGMAP_CONF("1"), TORRENT_RX_LANE_CDB_REGMAP_CONF("2"), TORRENT_RX_LANE_CDB_REGMAP_CONF("3"), }; static struct regmap_config cdns_torrent_common_cdb_config = { .name = "torrent_common_cdb", .reg_stride = 1, .fast_io = true, .reg_write = cdns_regmap_write, .reg_read = cdns_regmap_read, }; static struct regmap_config cdns_torrent_phy_pcs_cmn_cdb_config = { .name = "torrent_phy_pcs_cmn_cdb", .reg_stride = 1, .fast_io = true, .reg_write = cdns_regmap_write, .reg_read = cdns_regmap_read, }; static struct regmap_config cdns_torrent_phy_pma_cmn_cdb_config = { .name = "torrent_phy_pma_cmn_cdb", .reg_stride = 1, .fast_io = true, .reg_write = cdns_regmap_write, .reg_read = cdns_regmap_read, }; static struct regmap_config cdns_torrent_dptx_phy_config = { .name = "torrent_dptx_phy", .reg_stride = 1, .fast_io = true, .reg_write = cdns_regmap_dptx_write, .reg_read = cdns_regmap_dptx_read, }; /* PHY mmr access functions */ static void cdns_torrent_phy_write(struct regmap *regmap, u32 offset, u32 val) { regmap_write(regmap, offset, val); } static u32 cdns_torrent_phy_read(struct regmap *regmap, u32 offset) { unsigned int val; regmap_read(regmap, offset, &val); return val; } /* DPTX mmr access functions */ static void cdns_torrent_dp_write(struct regmap *regmap, u32 offset, u32 val) { regmap_write(regmap, offset, val); } static u32 cdns_torrent_dp_read(struct regmap *regmap, u32 offset) { u32 val; regmap_read(regmap, offset, &val); return val; } /* * Structure used to store values of PHY registers for voltage-related * coefficients, for particular voltage swing and pre-emphasis level. Values * are shared across all physical lanes. */ struct coefficients { /* Value of DRV_DIAG_TX_DRV register to use */ u16 diag_tx_drv; /* Value of TX_TXCC_MGNFS_MULT_000 register to use */ u16 mgnfs_mult; /* Value of TX_TXCC_CPOST_MULT_00 register to use */ u16 cpost_mult; }; /* * Array consists of values of voltage-related registers for sd0801 PHY. A value * of 0xFFFF is a placeholder for invalid combination, and will never be used. */ static const struct coefficients vltg_coeff[4][4] = { /* voltage swing 0, pre-emphasis 0->3 */ { {.diag_tx_drv = 0x0003, .mgnfs_mult = 0x002A, .cpost_mult = 0x0000}, {.diag_tx_drv = 0x0003, .mgnfs_mult = 0x001F, .cpost_mult = 0x0014}, {.diag_tx_drv = 0x0003, .mgnfs_mult = 0x0012, .cpost_mult = 0x0020}, {.diag_tx_drv = 0x0003, .mgnfs_mult = 0x0000, .cpost_mult = 0x002A} }, /* voltage swing 1, pre-emphasis 0->3 */ { {.diag_tx_drv = 0x0003, .mgnfs_mult = 0x001F, .cpost_mult = 0x0000}, {.diag_tx_drv = 0x0003, .mgnfs_mult = 0x0013, .cpost_mult = 0x0012}, {.diag_tx_drv = 0x0003, .mgnfs_mult = 0x0000, .cpost_mult = 0x001F}, {.diag_tx_drv = 0xFFFF, .mgnfs_mult = 0xFFFF, .cpost_mult = 0xFFFF} }, /* voltage swing 2, pre-emphasis 0->3 */ { {.diag_tx_drv = 0x0003, .mgnfs_mult = 0x0013, .cpost_mult = 0x0000}, {.diag_tx_drv = 0x0003, .mgnfs_mult = 0x0000, .cpost_mult = 0x0013}, {.diag_tx_drv = 0xFFFF, .mgnfs_mult = 0xFFFF, .cpost_mult = 0xFFFF}, {.diag_tx_drv = 0xFFFF, .mgnfs_mult = 0xFFFF, .cpost_mult = 0xFFFF} }, /* voltage swing 3, pre-emphasis 0->3 */ { {.diag_tx_drv = 0x0003, .mgnfs_mult = 0x0000, .cpost_mult = 0x0000}, {.diag_tx_drv = 0xFFFF, .mgnfs_mult = 0xFFFF, .cpost_mult = 0xFFFF}, {.diag_tx_drv = 0xFFFF, .mgnfs_mult = 0xFFFF, .cpost_mult = 0xFFFF}, {.diag_tx_drv = 0xFFFF, .mgnfs_mult = 0xFFFF, .cpost_mult = 0xFFFF} } }; /* * Enable or disable PLL for selected lanes. */ static int cdns_torrent_dp_set_pll_en(struct cdns_torrent_phy *cdns_phy, struct phy_configure_opts_dp *dp, bool enable) { u32 rd_val; u32 ret; struct regmap *regmap = cdns_phy->regmap_dptx_phy_reg; /* * Used to determine, which bits to check for or enable in * PHY_PMA_XCVR_PLLCLK_EN register. */ u32 pll_bits; /* Used to enable or disable lanes. */ u32 pll_val; /* Select values of registers and mask, depending on enabled lane * count. */ switch (dp->lanes) { /* lane 0 */ case (1): pll_bits = 0x00000001; break; /* lanes 0-1 */ case (2): pll_bits = 0x00000003; break; /* lanes 0-3, all */ default: pll_bits = 0x0000000F; break; } if (enable) pll_val = pll_bits; else pll_val = 0x00000000; cdns_torrent_dp_write(regmap, PHY_PMA_XCVR_PLLCLK_EN, pll_val); /* Wait for acknowledgment from PHY. */ ret = regmap_read_poll_timeout(regmap, PHY_PMA_XCVR_PLLCLK_EN_ACK, rd_val, (rd_val & pll_bits) == pll_val, 0, POLL_TIMEOUT_US); ndelay(100); return ret; } /* * Perform register operations related to setting link rate, once powerstate is * set and PLL disable request was processed. */ static int cdns_torrent_dp_configure_rate(struct cdns_torrent_phy *cdns_phy, struct phy_configure_opts_dp *dp) { u32 ret; u32 read_val; /* Disable the cmn_pll0_en before re-programming the new data rate. */ regmap_field_write(cdns_phy->phy_pma_pll_raw_ctrl, 0x0); /* * Wait for PLL ready de-assertion. * For PLL0 - PHY_PMA_CMN_CTRL2[2] == 1 */ ret = regmap_field_read_poll_timeout(cdns_phy->phy_pma_cmn_ctrl_2, read_val, ((read_val >> 2) & 0x01) != 0, 0, POLL_TIMEOUT_US); if (ret) return ret; ndelay(200); /* DP Rate Change - VCO Output settings. */ if (cdns_phy->ref_clk_rate == REF_CLK_19_2MHz) { /* PMA common configuration 19.2MHz */ cdns_torrent_dp_pma_cmn_vco_cfg_19_2mhz(cdns_phy, dp->link_rate, dp->ssc); cdns_torrent_dp_pma_cmn_cfg_19_2mhz(cdns_phy); } else if (cdns_phy->ref_clk_rate == REF_CLK_25MHz) { /* PMA common configuration 25MHz */ cdns_torrent_dp_pma_cmn_vco_cfg_25mhz(cdns_phy, dp->link_rate, dp->ssc); cdns_torrent_dp_pma_cmn_cfg_25mhz(cdns_phy); } cdns_torrent_dp_pma_cmn_rate(cdns_phy, dp->link_rate, dp->lanes); /* Enable the cmn_pll0_en. */ regmap_field_write(cdns_phy->phy_pma_pll_raw_ctrl, 0x3); /* * Wait for PLL ready assertion. * For PLL0 - PHY_PMA_CMN_CTRL2[0] == 1 */ ret = regmap_field_read_poll_timeout(cdns_phy->phy_pma_cmn_ctrl_2, read_val, (read_val & 0x01) != 0, 0, POLL_TIMEOUT_US); return ret; } /* * Verify, that parameters to configure PHY with are correct. */ static int cdns_torrent_dp_verify_config(struct cdns_torrent_inst *inst, struct phy_configure_opts_dp *dp) { u8 i; /* If changing link rate was required, verify it's supported. */ if (dp->set_rate) { switch (dp->link_rate) { case 1620: case 2160: case 2430: case 2700: case 3240: case 4320: case 5400: case 8100: /* valid bit rate */ break; default: return -EINVAL; } } /* Verify lane count. */ switch (dp->lanes) { case 1: case 2: case 4: /* valid lane count. */ break; default: return -EINVAL; } /* Check against actual number of PHY's lanes. */ if (dp->lanes > inst->num_lanes) return -EINVAL; /* * If changing voltages is required, check swing and pre-emphasis * levels, per-lane. */ if (dp->set_voltages) { /* Lane count verified previously. */ for (i = 0; i < dp->lanes; i++) { if (dp->voltage[i] > 3 || dp->pre[i] > 3) return -EINVAL; /* Sum of voltage swing and pre-emphasis levels cannot * exceed 3. */ if (dp->voltage[i] + dp->pre[i] > 3) return -EINVAL; } } return 0; } /* Set power state A0 and PLL clock enable to 0 on enabled lanes. */ static void cdns_torrent_dp_set_a0_pll(struct cdns_torrent_phy *cdns_phy, u32 num_lanes) { struct regmap *regmap = cdns_phy->regmap_dptx_phy_reg; u32 pwr_state = cdns_torrent_dp_read(regmap, PHY_PMA_XCVR_POWER_STATE_REQ); u32 pll_clk_en = cdns_torrent_dp_read(regmap, PHY_PMA_XCVR_PLLCLK_EN); /* Lane 0 is always enabled. */ pwr_state &= ~(PMA_XCVR_POWER_STATE_REQ_LN_MASK << PHY_POWER_STATE_LN_0); pll_clk_en &= ~0x01U; if (num_lanes > 1) { /* lane 1 */ pwr_state &= ~(PMA_XCVR_POWER_STATE_REQ_LN_MASK << PHY_POWER_STATE_LN_1); pll_clk_en &= ~(0x01U << 1); } if (num_lanes > 2) { /* lanes 2 and 3 */ pwr_state &= ~(PMA_XCVR_POWER_STATE_REQ_LN_MASK << PHY_POWER_STATE_LN_2); pwr_state &= ~(PMA_XCVR_POWER_STATE_REQ_LN_MASK << PHY_POWER_STATE_LN_3); pll_clk_en &= ~(0x01U << 2); pll_clk_en &= ~(0x01U << 3); } cdns_torrent_dp_write(regmap, PHY_PMA_XCVR_POWER_STATE_REQ, pwr_state); cdns_torrent_dp_write(regmap, PHY_PMA_XCVR_PLLCLK_EN, pll_clk_en); } /* Configure lane count as required. */ static int cdns_torrent_dp_set_lanes(struct cdns_torrent_phy *cdns_phy, struct phy_configure_opts_dp *dp) { u32 value; u32 ret; struct regmap *regmap = cdns_phy->regmap_dptx_phy_reg; u8 lane_mask = (1 << dp->lanes) - 1; value = cdns_torrent_dp_read(regmap, PHY_RESET); /* clear pma_tx_elec_idle_ln_* bits. */ value &= ~PMA_TX_ELEC_IDLE_MASK; /* Assert pma_tx_elec_idle_ln_* for disabled lanes. */ value |= ((~lane_mask) << PMA_TX_ELEC_IDLE_SHIFT) & PMA_TX_ELEC_IDLE_MASK; cdns_torrent_dp_write(regmap, PHY_RESET, value); /* reset the link by asserting phy_l00_reset_n low */ cdns_torrent_dp_write(regmap, PHY_RESET, value & (~PHY_L00_RESET_N_MASK)); /* * Assert lane reset on unused lanes and lane 0 so they remain in reset * and powered down when re-enabling the link */ value = (value & 0x0000FFF0) | (0x0000000E & lane_mask); cdns_torrent_dp_write(regmap, PHY_RESET, value); cdns_torrent_dp_set_a0_pll(cdns_phy, dp->lanes); /* release phy_l0*_reset_n based on used laneCount */ value = (value & 0x0000FFF0) | (0x0000000F & lane_mask); cdns_torrent_dp_write(regmap, PHY_RESET, value); /* Wait, until PHY gets ready after releasing PHY reset signal. */ ret = cdns_torrent_dp_wait_pma_cmn_ready(cdns_phy); if (ret) return ret; ndelay(100); /* release pma_xcvr_pllclk_en_ln_*, only for the master lane */ cdns_torrent_dp_write(regmap, PHY_PMA_XCVR_PLLCLK_EN, 0x0001); ret = cdns_torrent_dp_run(cdns_phy, dp->lanes); return ret; } /* Configure link rate as required. */ static int cdns_torrent_dp_set_rate(struct cdns_torrent_phy *cdns_phy, struct phy_configure_opts_dp *dp) { u32 ret; ret = cdns_torrent_dp_set_power_state(cdns_phy, dp->lanes, POWERSTATE_A3); if (ret) return ret; ret = cdns_torrent_dp_set_pll_en(cdns_phy, dp, false); if (ret) return ret; ndelay(200); ret = cdns_torrent_dp_configure_rate(cdns_phy, dp); if (ret) return ret; ndelay(200); ret = cdns_torrent_dp_set_pll_en(cdns_phy, dp, true); if (ret) return ret; ret = cdns_torrent_dp_set_power_state(cdns_phy, dp->lanes, POWERSTATE_A2); if (ret) return ret; ret = cdns_torrent_dp_set_power_state(cdns_phy, dp->lanes, POWERSTATE_A0); if (ret) return ret; ndelay(900); return ret; } /* Configure voltage swing and pre-emphasis for all enabled lanes. */ static void cdns_torrent_dp_set_voltages(struct cdns_torrent_phy *cdns_phy, struct phy_configure_opts_dp *dp) { u8 lane; u16 val; for (lane = 0; lane < dp->lanes; lane++) { val = cdns_torrent_phy_read(cdns_phy->regmap_tx_lane_cdb[lane], TX_DIAG_ACYA); /* * Write 1 to register bit TX_DIAG_ACYA[0] to freeze the * current state of the analog TX driver. */ val |= TX_DIAG_ACYA_HBDC_MASK; cdns_torrent_phy_write(cdns_phy->regmap_tx_lane_cdb[lane], TX_DIAG_ACYA, val); cdns_torrent_phy_write(cdns_phy->regmap_tx_lane_cdb[lane], TX_TXCC_CTRL, 0x08A4); val = vltg_coeff[dp->voltage[lane]][dp->pre[lane]].diag_tx_drv; cdns_torrent_phy_write(cdns_phy->regmap_tx_lane_cdb[lane], DRV_DIAG_TX_DRV, val); val = vltg_coeff[dp->voltage[lane]][dp->pre[lane]].mgnfs_mult; cdns_torrent_phy_write(cdns_phy->regmap_tx_lane_cdb[lane], TX_TXCC_MGNFS_MULT_000, val); val = vltg_coeff[dp->voltage[lane]][dp->pre[lane]].cpost_mult; cdns_torrent_phy_write(cdns_phy->regmap_tx_lane_cdb[lane], TX_TXCC_CPOST_MULT_00, val); val = cdns_torrent_phy_read(cdns_phy->regmap_tx_lane_cdb[lane], TX_DIAG_ACYA); /* * Write 0 to register bit TX_DIAG_ACYA[0] to allow the state of * analog TX driver to reflect the new programmed one. */ val &= ~TX_DIAG_ACYA_HBDC_MASK; cdns_torrent_phy_write(cdns_phy->regmap_tx_lane_cdb[lane], TX_DIAG_ACYA, val); } }; static int cdns_torrent_dp_configure(struct phy *phy, union phy_configure_opts *opts) { struct cdns_torrent_inst *inst = phy_get_drvdata(phy); struct cdns_torrent_phy *cdns_phy = dev_get_drvdata(phy->dev.parent); int ret; ret = cdns_torrent_dp_verify_config(inst, &opts->dp); if (ret) { dev_err(&phy->dev, "invalid params for phy configure\n"); return ret; } if (opts->dp.set_lanes) { ret = cdns_torrent_dp_set_lanes(cdns_phy, &opts->dp); if (ret) { dev_err(&phy->dev, "cdns_torrent_dp_set_lanes failed\n"); return ret; } } if (opts->dp.set_rate) { ret = cdns_torrent_dp_set_rate(cdns_phy, &opts->dp); if (ret) { dev_err(&phy->dev, "cdns_torrent_dp_set_rate failed\n"); return ret; } } if (opts->dp.set_voltages) cdns_torrent_dp_set_voltages(cdns_phy, &opts->dp); return ret; } static int cdns_torrent_dp_init(struct phy *phy) { unsigned char lane_bits; int ret; struct cdns_torrent_inst *inst = phy_get_drvdata(phy); struct cdns_torrent_phy *cdns_phy = dev_get_drvdata(phy->dev.parent); struct regmap *regmap = cdns_phy->regmap_dptx_phy_reg; ret = clk_prepare_enable(cdns_phy->clk); if (ret) { dev_err(cdns_phy->dev, "Failed to prepare ref clock\n"); return ret; } cdns_phy->ref_clk_rate = clk_get_rate(cdns_phy->clk); if (!(cdns_phy->ref_clk_rate)) { dev_err(cdns_phy->dev, "Failed to get ref clock rate\n"); clk_disable_unprepare(cdns_phy->clk); return -EINVAL; } switch (cdns_phy->ref_clk_rate) { case REF_CLK_19_2MHz: case REF_CLK_25MHz: /* Valid Ref Clock Rate */ break; default: dev_err(cdns_phy->dev, "Unsupported Ref Clock Rate\n"); return -EINVAL; } cdns_torrent_dp_write(regmap, PHY_AUX_CTRL, 0x0003); /* enable AUX */ /* PHY PMA registers configuration function */ cdns_torrent_dp_pma_cfg(cdns_phy, inst); /* * Set lines power state to A0 * Set lines pll clk enable to 0 */ cdns_torrent_dp_set_a0_pll(cdns_phy, inst->num_lanes); /* * release phy_l0*_reset_n and pma_tx_elec_idle_ln_* based on * used lanes */ lane_bits = (1 << inst->num_lanes) - 1; cdns_torrent_dp_write(regmap, PHY_RESET, ((0xF & ~lane_bits) << 4) | (0xF & lane_bits)); /* release pma_xcvr_pllclk_en_ln_*, only for the master lane */ cdns_torrent_dp_write(regmap, PHY_PMA_XCVR_PLLCLK_EN, 0x0001); /* PHY PMA registers configuration functions */ /* Initialize PHY with max supported link rate, without SSC. */ if (cdns_phy->ref_clk_rate == REF_CLK_19_2MHz) cdns_torrent_dp_pma_cmn_vco_cfg_19_2mhz(cdns_phy, cdns_phy->max_bit_rate, false); else if (cdns_phy->ref_clk_rate == REF_CLK_25MHz) cdns_torrent_dp_pma_cmn_vco_cfg_25mhz(cdns_phy, cdns_phy->max_bit_rate, false); cdns_torrent_dp_pma_cmn_rate(cdns_phy, cdns_phy->max_bit_rate, inst->num_lanes); /* take out of reset */ regmap_field_write(cdns_phy->phy_reset_ctrl, 0x1); cdns_torrent_phy_on(phy); ret = cdns_torrent_dp_wait_pma_cmn_ready(cdns_phy); if (ret) return ret; ret = cdns_torrent_dp_run(cdns_phy, inst->num_lanes); return ret; } static int cdns_torrent_dp_exit(struct phy *phy) { struct cdns_torrent_phy *cdns_phy = dev_get_drvdata(phy->dev.parent); clk_disable_unprepare(cdns_phy->clk); return 0; } static int cdns_torrent_dp_wait_pma_cmn_ready(struct cdns_torrent_phy *cdns_phy) { unsigned int reg; int ret; struct regmap *regmap = cdns_phy->regmap_dptx_phy_reg; ret = regmap_read_poll_timeout(regmap, PHY_PMA_CMN_READY, reg, reg & 1, 0, POLL_TIMEOUT_US); if (ret == -ETIMEDOUT) { dev_err(cdns_phy->dev, "timeout waiting for PMA common ready\n"); return -ETIMEDOUT; } return 0; } static void cdns_torrent_dp_pma_cfg(struct cdns_torrent_phy *cdns_phy, struct cdns_torrent_inst *inst) { unsigned int i; if (cdns_phy->ref_clk_rate == REF_CLK_19_2MHz) /* PMA common configuration 19.2MHz */ cdns_torrent_dp_pma_cmn_cfg_19_2mhz(cdns_phy); else if (cdns_phy->ref_clk_rate == REF_CLK_25MHz) /* PMA common configuration 25MHz */ cdns_torrent_dp_pma_cmn_cfg_25mhz(cdns_phy); /* PMA lane configuration to deal with multi-link operation */ for (i = 0; i < inst->num_lanes; i++) cdns_torrent_dp_pma_lane_cfg(cdns_phy, i); } static void cdns_torrent_dp_pma_cmn_cfg_19_2mhz(struct cdns_torrent_phy *cdns_phy) { struct regmap *regmap = cdns_phy->regmap_common_cdb; /* refclock registers - assumes 19.2 MHz refclock */ cdns_torrent_phy_write(regmap, CMN_SSM_BIAS_TMR, 0x0014); cdns_torrent_phy_write(regmap, CMN_PLLSM0_PLLPRE_TMR, 0x0027); cdns_torrent_phy_write(regmap, CMN_PLLSM0_PLLLOCK_TMR, 0x00A1); cdns_torrent_phy_write(regmap, CMN_PLLSM1_PLLPRE_TMR, 0x0027); cdns_torrent_phy_write(regmap, CMN_PLLSM1_PLLLOCK_TMR, 0x00A1); cdns_torrent_phy_write(regmap, CMN_BGCAL_INIT_TMR, 0x0060); cdns_torrent_phy_write(regmap, CMN_BGCAL_ITER_TMR, 0x0060); cdns_torrent_phy_write(regmap, CMN_IBCAL_INIT_TMR, 0x0014); cdns_torrent_phy_write(regmap, CMN_TXPUCAL_INIT_TMR, 0x0018); cdns_torrent_phy_write(regmap, CMN_TXPUCAL_ITER_TMR, 0x0005); cdns_torrent_phy_write(regmap, CMN_TXPDCAL_INIT_TMR, 0x0018); cdns_torrent_phy_write(regmap, CMN_TXPDCAL_ITER_TMR, 0x0005); cdns_torrent_phy_write(regmap, CMN_RXCAL_INIT_TMR, 0x0240); cdns_torrent_phy_write(regmap, CMN_RXCAL_ITER_TMR, 0x0005); cdns_torrent_phy_write(regmap, CMN_SD_CAL_INIT_TMR, 0x0002); cdns_torrent_phy_write(regmap, CMN_SD_CAL_ITER_TMR, 0x0002); cdns_torrent_phy_write(regmap, CMN_SD_CAL_REFTIM_START, 0x000B); cdns_torrent_phy_write(regmap, CMN_SD_CAL_PLLCNT_START, 0x0137); /* PLL registers */ cdns_torrent_phy_write(regmap, CMN_PDIAG_PLL0_CP_PADJ_M0, 0x0509); cdns_torrent_phy_write(regmap, CMN_PDIAG_PLL0_CP_IADJ_M0, 0x0F00); cdns_torrent_phy_write(regmap, CMN_PDIAG_PLL0_FILT_PADJ_M0, 0x0F08); cdns_torrent_phy_write(regmap, CMN_PLL0_DSM_DIAG_M0, 0x0004); cdns_torrent_phy_write(regmap, CMN_PDIAG_PLL1_CP_PADJ_M0, 0x0509); cdns_torrent_phy_write(regmap, CMN_PDIAG_PLL1_CP_IADJ_M0, 0x0F00); cdns_torrent_phy_write(regmap, CMN_PDIAG_PLL1_FILT_PADJ_M0, 0x0F08); cdns_torrent_phy_write(regmap, CMN_PLL1_DSM_DIAG_M0, 0x0004); cdns_torrent_phy_write(regmap, CMN_PLL0_VCOCAL_INIT_TMR, 0x00C0); cdns_torrent_phy_write(regmap, CMN_PLL0_VCOCAL_ITER_TMR, 0x0004); cdns_torrent_phy_write(regmap, CMN_PLL1_VCOCAL_INIT_TMR, 0x00C0); cdns_torrent_phy_write(regmap, CMN_PLL1_VCOCAL_ITER_TMR, 0x0004); cdns_torrent_phy_write(regmap, CMN_PLL0_VCOCAL_REFTIM_START, 0x0260); cdns_torrent_phy_write(regmap, CMN_PLL0_VCOCAL_TCTRL, 0x0003); cdns_torrent_phy_write(regmap, CMN_PLL1_VCOCAL_REFTIM_START, 0x0260); cdns_torrent_phy_write(regmap, CMN_PLL1_VCOCAL_TCTRL, 0x0003); } /* * Set registers responsible for enabling and configuring SSC, with second and * third register values provided by parameters. */ static void cdns_torrent_dp_enable_ssc_19_2mhz(struct cdns_torrent_phy *cdns_phy, u32 ctrl2_val, u32 ctrl3_val) { struct regmap *regmap = cdns_phy->regmap_common_cdb; cdns_torrent_phy_write(regmap, CMN_PLL0_SS_CTRL1_M0, 0x0001); cdns_torrent_phy_write(regmap, CMN_PLL0_SS_CTRL1_M0, ctrl2_val); cdns_torrent_phy_write(regmap, CMN_PLL0_SS_CTRL1_M0, ctrl3_val); cdns_torrent_phy_write(regmap, CMN_PLL0_SS_CTRL4_M0, 0x0003); cdns_torrent_phy_write(regmap, CMN_PLL1_SS_CTRL1_M0, 0x0001); cdns_torrent_phy_write(regmap, CMN_PLL1_SS_CTRL1_M0, ctrl2_val); cdns_torrent_phy_write(regmap, CMN_PLL1_SS_CTRL1_M0, ctrl3_val); cdns_torrent_phy_write(regmap, CMN_PLL1_SS_CTRL4_M0, 0x0003); } static void cdns_torrent_dp_pma_cmn_vco_cfg_19_2mhz(struct cdns_torrent_phy *cdns_phy, u32 rate, bool ssc) { struct regmap *regmap = cdns_phy->regmap_common_cdb; /* Assumes 19.2 MHz refclock */ switch (rate) { /* Setting VCO for 10.8GHz */ case 2700: case 5400: cdns_torrent_phy_write(regmap, CMN_PLL0_INTDIV_M0, 0x0119); cdns_torrent_phy_write(regmap, CMN_PLL0_FRACDIVL_M0, 0x4000); cdns_torrent_phy_write(regmap, CMN_PLL0_FRACDIVH_M0, 0x0002); cdns_torrent_phy_write(regmap, CMN_PLL0_HIGH_THR_M0, 0x00BC); cdns_torrent_phy_write(regmap, CMN_PDIAG_PLL0_CTRL_M0, 0x0012); cdns_torrent_phy_write(regmap, CMN_PLL1_INTDIV_M0, 0x0119); cdns_torrent_phy_write(regmap, CMN_PLL1_FRACDIVL_M0, 0x4000); cdns_torrent_phy_write(regmap, CMN_PLL1_FRACDIVH_M0, 0x0002); cdns_torrent_phy_write(regmap, CMN_PLL1_HIGH_THR_M0, 0x00BC); cdns_torrent_phy_write(regmap, CMN_PDIAG_PLL1_CTRL_M0, 0x0012); if (ssc) cdns_torrent_dp_enable_ssc_19_2mhz(cdns_phy, 0x033A, 0x006A); break; /* Setting VCO for 9.72GHz */ case 1620: case 2430: case 3240: cdns_torrent_phy_write(regmap, CMN_PLL0_INTDIV_M0, 0x01FA); cdns_torrent_phy_write(regmap, CMN_PLL0_FRACDIVL_M0, 0x4000); cdns_torrent_phy_write(regmap, CMN_PLL0_FRACDIVH_M0, 0x0002); cdns_torrent_phy_write(regmap, CMN_PLL0_HIGH_THR_M0, 0x0152); cdns_torrent_phy_write(regmap, CMN_PDIAG_PLL0_CTRL_M0, 0x0002); cdns_torrent_phy_write(regmap, CMN_PLL1_INTDIV_M0, 0x01FA); cdns_torrent_phy_write(regmap, CMN_PLL1_FRACDIVL_M0, 0x4000); cdns_torrent_phy_write(regmap, CMN_PLL1_FRACDIVH_M0, 0x0002); cdns_torrent_phy_write(regmap, CMN_PLL1_HIGH_THR_M0, 0x0152); cdns_torrent_phy_write(regmap, CMN_PDIAG_PLL1_CTRL_M0, 0x0002); if (ssc) cdns_torrent_dp_enable_ssc_19_2mhz(cdns_phy, 0x05DD, 0x0069); break; /* Setting VCO for 8.64GHz */ case 2160: case 4320: cdns_torrent_phy_write(regmap, CMN_PLL0_INTDIV_M0, 0x01C2); cdns_torrent_phy_write(regmap, CMN_PLL0_FRACDIVL_M0, 0x0000); cdns_torrent_phy_write(regmap, CMN_PLL0_FRACDIVH_M0, 0x0002); cdns_torrent_phy_write(regmap, CMN_PLL0_HIGH_THR_M0, 0x012C); cdns_torrent_phy_write(regmap, CMN_PDIAG_PLL0_CTRL_M0, 0x0002); cdns_torrent_phy_write(regmap, CMN_PLL1_INTDIV_M0, 0x01C2); cdns_torrent_phy_write(regmap, CMN_PLL1_FRACDIVL_M0, 0x0000); cdns_torrent_phy_write(regmap, CMN_PLL1_FRACDIVH_M0, 0x0002); cdns_torrent_phy_write(regmap, CMN_PLL1_HIGH_THR_M0, 0x012C); cdns_torrent_phy_write(regmap, CMN_PDIAG_PLL1_CTRL_M0, 0x0002); if (ssc) cdns_torrent_dp_enable_ssc_19_2mhz(cdns_phy, 0x0536, 0x0069); break; /* Setting VCO for 8.1GHz */ case 8100: cdns_torrent_phy_write(regmap, CMN_PLL0_INTDIV_M0, 0x01A5); cdns_torrent_phy_write(regmap, CMN_PLL0_FRACDIVL_M0, 0xE000); cdns_torrent_phy_write(regmap, CMN_PLL0_FRACDIVH_M0, 0x0002); cdns_torrent_phy_write(regmap, CMN_PLL0_HIGH_THR_M0, 0x011A); cdns_torrent_phy_write(regmap, CMN_PDIAG_PLL0_CTRL_M0, 0x0002); cdns_torrent_phy_write(regmap, CMN_PLL1_INTDIV_M0, 0x01A5); cdns_torrent_phy_write(regmap, CMN_PLL1_FRACDIVL_M0, 0xE000); cdns_torrent_phy_write(regmap, CMN_PLL1_FRACDIVH_M0, 0x0002); cdns_torrent_phy_write(regmap, CMN_PLL1_HIGH_THR_M0, 0x011A); cdns_torrent_phy_write(regmap, CMN_PDIAG_PLL1_CTRL_M0, 0x0002); if (ssc) cdns_torrent_dp_enable_ssc_19_2mhz(cdns_phy, 0x04D7, 0x006A); break; } if (ssc) { cdns_torrent_phy_write(regmap, CMN_PLL0_VCOCAL_PLLCNT_START, 0x025E); cdns_torrent_phy_write(regmap, CMN_PLL0_LOCK_PLLCNT_THR, 0x0005); cdns_torrent_phy_write(regmap, CMN_PLL1_VCOCAL_PLLCNT_START, 0x025E); cdns_torrent_phy_write(regmap, CMN_PLL1_LOCK_PLLCNT_THR, 0x0005); } else { cdns_torrent_phy_write(regmap, CMN_PLL0_VCOCAL_PLLCNT_START, 0x0260); cdns_torrent_phy_write(regmap, CMN_PLL1_VCOCAL_PLLCNT_START, 0x0260); /* Set reset register values to disable SSC */ cdns_torrent_phy_write(regmap, CMN_PLL0_SS_CTRL1_M0, 0x0002); cdns_torrent_phy_write(regmap, CMN_PLL0_SS_CTRL2_M0, 0x0000); cdns_torrent_phy_write(regmap, CMN_PLL0_SS_CTRL3_M0, 0x0000); cdns_torrent_phy_write(regmap, CMN_PLL0_SS_CTRL4_M0, 0x0000); cdns_torrent_phy_write(regmap, CMN_PLL0_LOCK_PLLCNT_THR, 0x0003); cdns_torrent_phy_write(regmap, CMN_PLL1_SS_CTRL1_M0, 0x0002); cdns_torrent_phy_write(regmap, CMN_PLL1_SS_CTRL2_M0, 0x0000); cdns_torrent_phy_write(regmap, CMN_PLL1_SS_CTRL3_M0, 0x0000); cdns_torrent_phy_write(regmap, CMN_PLL1_SS_CTRL4_M0, 0x0000); cdns_torrent_phy_write(regmap, CMN_PLL1_LOCK_PLLCNT_THR, 0x0003); } cdns_torrent_phy_write(regmap, CMN_PLL0_LOCK_REFCNT_START, 0x0099); cdns_torrent_phy_write(regmap, CMN_PLL0_LOCK_PLLCNT_START, 0x0099); cdns_torrent_phy_write(regmap, CMN_PLL1_LOCK_REFCNT_START, 0x0099); cdns_torrent_phy_write(regmap, CMN_PLL1_LOCK_PLLCNT_START, 0x0099); } static void cdns_torrent_dp_pma_cmn_cfg_25mhz(struct cdns_torrent_phy *cdns_phy) { struct regmap *regmap = cdns_phy->regmap_common_cdb; /* refclock registers - assumes 25 MHz refclock */ cdns_torrent_phy_write(regmap, CMN_SSM_BIAS_TMR, 0x0019); cdns_torrent_phy_write(regmap, CMN_PLLSM0_PLLPRE_TMR, 0x0032); cdns_torrent_phy_write(regmap, CMN_PLLSM0_PLLLOCK_TMR, 0x00D1); cdns_torrent_phy_write(regmap, CMN_PLLSM1_PLLPRE_TMR, 0x0032); cdns_torrent_phy_write(regmap, CMN_PLLSM1_PLLLOCK_TMR, 0x00D1); cdns_torrent_phy_write(regmap, CMN_BGCAL_INIT_TMR, 0x007D); cdns_torrent_phy_write(regmap, CMN_BGCAL_ITER_TMR, 0x007D); cdns_torrent_phy_write(regmap, CMN_IBCAL_INIT_TMR, 0x0019); cdns_torrent_phy_write(regmap, CMN_TXPUCAL_INIT_TMR, 0x001E); cdns_torrent_phy_write(regmap, CMN_TXPUCAL_ITER_TMR, 0x0006); cdns_torrent_phy_write(regmap, CMN_TXPDCAL_INIT_TMR, 0x001E); cdns_torrent_phy_write(regmap, CMN_TXPDCAL_ITER_TMR, 0x0006); cdns_torrent_phy_write(regmap, CMN_RXCAL_INIT_TMR, 0x02EE); cdns_torrent_phy_write(regmap, CMN_RXCAL_ITER_TMR, 0x0006); cdns_torrent_phy_write(regmap, CMN_SD_CAL_INIT_TMR, 0x0002); cdns_torrent_phy_write(regmap, CMN_SD_CAL_ITER_TMR, 0x0002); cdns_torrent_phy_write(regmap, CMN_SD_CAL_REFTIM_START, 0x000E); cdns_torrent_phy_write(regmap, CMN_SD_CAL_PLLCNT_START, 0x012B); /* PLL registers */ cdns_torrent_phy_write(regmap, CMN_PDIAG_PLL0_CP_PADJ_M0, 0x0509); cdns_torrent_phy_write(regmap, CMN_PDIAG_PLL0_CP_IADJ_M0, 0x0F00); cdns_torrent_phy_write(regmap, CMN_PDIAG_PLL0_FILT_PADJ_M0, 0x0F08); cdns_torrent_phy_write(regmap, CMN_PLL0_DSM_DIAG_M0, 0x0004); cdns_torrent_phy_write(regmap, CMN_PDIAG_PLL1_CP_PADJ_M0, 0x0509); cdns_torrent_phy_write(regmap, CMN_PDIAG_PLL1_CP_IADJ_M0, 0x0F00); cdns_torrent_phy_write(regmap, CMN_PDIAG_PLL1_FILT_PADJ_M0, 0x0F08); cdns_torrent_phy_write(regmap, CMN_PLL1_DSM_DIAG_M0, 0x0004); cdns_torrent_phy_write(regmap, CMN_PLL0_VCOCAL_INIT_TMR, 0x00FA); cdns_torrent_phy_write(regmap, CMN_PLL0_VCOCAL_ITER_TMR, 0x0004); cdns_torrent_phy_write(regmap, CMN_PLL1_VCOCAL_INIT_TMR, 0x00FA); cdns_torrent_phy_write(regmap, CMN_PLL1_VCOCAL_ITER_TMR, 0x0004); cdns_torrent_phy_write(regmap, CMN_PLL0_VCOCAL_REFTIM_START, 0x0317); cdns_torrent_phy_write(regmap, CMN_PLL0_VCOCAL_TCTRL, 0x0003); cdns_torrent_phy_write(regmap, CMN_PLL1_VCOCAL_REFTIM_START, 0x0317); cdns_torrent_phy_write(regmap, CMN_PLL1_VCOCAL_TCTRL, 0x0003); } /* * Set registers responsible for enabling and configuring SSC, with second * register value provided by a parameter. */ static void cdns_torrent_dp_enable_ssc_25mhz(struct cdns_torrent_phy *cdns_phy, u32 ctrl2_val) { struct regmap *regmap = cdns_phy->regmap_common_cdb; cdns_torrent_phy_write(regmap, CMN_PLL0_SS_CTRL1_M0, 0x0001); cdns_torrent_phy_write(regmap, CMN_PLL0_SS_CTRL1_M0, ctrl2_val); cdns_torrent_phy_write(regmap, CMN_PLL0_SS_CTRL1_M0, 0x007F); cdns_torrent_phy_write(regmap, CMN_PLL0_SS_CTRL4_M0, 0x0003); cdns_torrent_phy_write(regmap, CMN_PLL1_SS_CTRL1_M0, 0x0001); cdns_torrent_phy_write(regmap, CMN_PLL1_SS_CTRL1_M0, ctrl2_val); cdns_torrent_phy_write(regmap, CMN_PLL1_SS_CTRL1_M0, 0x007F); cdns_torrent_phy_write(regmap, CMN_PLL1_SS_CTRL4_M0, 0x0003); } static void cdns_torrent_dp_pma_cmn_vco_cfg_25mhz(struct cdns_torrent_phy *cdns_phy, u32 rate, bool ssc) { struct regmap *regmap = cdns_phy->regmap_common_cdb; /* Assumes 25 MHz refclock */ switch (rate) { /* Setting VCO for 10.8GHz */ case 2700: case 5400: cdns_torrent_phy_write(regmap, CMN_PLL0_INTDIV_M0, 0x01B0); cdns_torrent_phy_write(regmap, CMN_PLL0_FRACDIVL_M0, 0x0000); cdns_torrent_phy_write(regmap, CMN_PLL0_FRACDIVH_M0, 0x0002); cdns_torrent_phy_write(regmap, CMN_PLL0_HIGH_THR_M0, 0x0120); cdns_torrent_phy_write(regmap, CMN_PLL1_INTDIV_M0, 0x01B0); cdns_torrent_phy_write(regmap, CMN_PLL1_FRACDIVL_M0, 0x0000); cdns_torrent_phy_write(regmap, CMN_PLL1_FRACDIVH_M0, 0x0002); cdns_torrent_phy_write(regmap, CMN_PLL1_HIGH_THR_M0, 0x0120); if (ssc) cdns_torrent_dp_enable_ssc_25mhz(cdns_phy, 0x0423); break; /* Setting VCO for 9.72GHz */ case 1620: case 2430: case 3240: cdns_torrent_phy_write(regmap, CMN_PLL0_INTDIV_M0, 0x0184); cdns_torrent_phy_write(regmap, CMN_PLL0_FRACDIVL_M0, 0xCCCD); cdns_torrent_phy_write(regmap, CMN_PLL0_FRACDIVH_M0, 0x0002); cdns_torrent_phy_write(regmap, CMN_PLL0_HIGH_THR_M0, 0x0104); cdns_torrent_phy_write(regmap, CMN_PLL1_INTDIV_M0, 0x0184); cdns_torrent_phy_write(regmap, CMN_PLL1_FRACDIVL_M0, 0xCCCD); cdns_torrent_phy_write(regmap, CMN_PLL1_FRACDIVH_M0, 0x0002); cdns_torrent_phy_write(regmap, CMN_PLL1_HIGH_THR_M0, 0x0104); if (ssc) cdns_torrent_dp_enable_ssc_25mhz(cdns_phy, 0x03B9); break; /* Setting VCO for 8.64GHz */ case 2160: case 4320: cdns_torrent_phy_write(regmap, CMN_PLL0_INTDIV_M0, 0x0159); cdns_torrent_phy_write(regmap, CMN_PLL0_FRACDIVL_M0, 0x999A); cdns_torrent_phy_write(regmap, CMN_PLL0_FRACDIVH_M0, 0x0002); cdns_torrent_phy_write(regmap, CMN_PLL0_HIGH_THR_M0, 0x00E7); cdns_torrent_phy_write(regmap, CMN_PLL1_INTDIV_M0, 0x0159); cdns_torrent_phy_write(regmap, CMN_PLL1_FRACDIVL_M0, 0x999A); cdns_torrent_phy_write(regmap, CMN_PLL1_FRACDIVH_M0, 0x0002); cdns_torrent_phy_write(regmap, CMN_PLL1_HIGH_THR_M0, 0x00E7); if (ssc) cdns_torrent_dp_enable_ssc_25mhz(cdns_phy, 0x034F); break; /* Setting VCO for 8.1GHz */ case 8100: cdns_torrent_phy_write(regmap, CMN_PLL0_INTDIV_M0, 0x0144); cdns_torrent_phy_write(regmap, CMN_PLL0_FRACDIVL_M0, 0x0000); cdns_torrent_phy_write(regmap, CMN_PLL0_FRACDIVH_M0, 0x0002); cdns_torrent_phy_write(regmap, CMN_PLL0_HIGH_THR_M0, 0x00D8); cdns_torrent_phy_write(regmap, CMN_PLL1_INTDIV_M0, 0x0144); cdns_torrent_phy_write(regmap, CMN_PLL1_FRACDIVL_M0, 0x0000); cdns_torrent_phy_write(regmap, CMN_PLL1_FRACDIVH_M0, 0x0002); cdns_torrent_phy_write(regmap, CMN_PLL1_HIGH_THR_M0, 0x00D8); if (ssc) cdns_torrent_dp_enable_ssc_25mhz(cdns_phy, 0x031A); break; } cdns_torrent_phy_write(regmap, CMN_PDIAG_PLL0_CTRL_M0, 0x0002); cdns_torrent_phy_write(regmap, CMN_PDIAG_PLL1_CTRL_M0, 0x0002); if (ssc) { cdns_torrent_phy_write(regmap, CMN_PLL0_VCOCAL_PLLCNT_START, 0x0315); cdns_torrent_phy_write(regmap, CMN_PLL0_LOCK_PLLCNT_THR, 0x0005); cdns_torrent_phy_write(regmap, CMN_PLL1_VCOCAL_PLLCNT_START, 0x0315); cdns_torrent_phy_write(regmap, CMN_PLL1_LOCK_PLLCNT_THR, 0x0005); } else { cdns_torrent_phy_write(regmap, CMN_PLL0_VCOCAL_PLLCNT_START, 0x0317); cdns_torrent_phy_write(regmap, CMN_PLL1_VCOCAL_PLLCNT_START, 0x0317); /* Set reset register values to disable SSC */ cdns_torrent_phy_write(regmap, CMN_PLL0_SS_CTRL1_M0, 0x0002); cdns_torrent_phy_write(regmap, CMN_PLL0_SS_CTRL2_M0, 0x0000); cdns_torrent_phy_write(regmap, CMN_PLL0_SS_CTRL3_M0, 0x0000); cdns_torrent_phy_write(regmap, CMN_PLL0_SS_CTRL4_M0, 0x0000); cdns_torrent_phy_write(regmap, CMN_PLL0_LOCK_PLLCNT_THR, 0x0003); cdns_torrent_phy_write(regmap, CMN_PLL1_SS_CTRL1_M0, 0x0002); cdns_torrent_phy_write(regmap, CMN_PLL1_SS_CTRL2_M0, 0x0000); cdns_torrent_phy_write(regmap, CMN_PLL1_SS_CTRL3_M0, 0x0000); cdns_torrent_phy_write(regmap, CMN_PLL1_SS_CTRL4_M0, 0x0000); cdns_torrent_phy_write(regmap, CMN_PLL1_LOCK_PLLCNT_THR, 0x0003); } cdns_torrent_phy_write(regmap, CMN_PLL0_LOCK_REFCNT_START, 0x00C7); cdns_torrent_phy_write(regmap, CMN_PLL0_LOCK_PLLCNT_START, 0x00C7); cdns_torrent_phy_write(regmap, CMN_PLL1_LOCK_REFCNT_START, 0x00C7); cdns_torrent_phy_write(regmap, CMN_PLL1_LOCK_PLLCNT_START, 0x00C7); } static void cdns_torrent_dp_pma_cmn_rate(struct cdns_torrent_phy *cdns_phy, u32 rate, u32 num_lanes) { unsigned int clk_sel_val = 0; unsigned int hsclk_div_val = 0; unsigned int i; /* 16'h0000 for single DP link configuration */ regmap_field_write(cdns_phy->phy_pll_cfg, 0x0); switch (rate) { case 1620: clk_sel_val = 0x0f01; hsclk_div_val = 2; break; case 2160: case 2430: case 2700: clk_sel_val = 0x0701; hsclk_div_val = 1; break; case 3240: clk_sel_val = 0x0b00; hsclk_div_val = 2; break; case 4320: case 5400: clk_sel_val = 0x0301; hsclk_div_val = 0; break; case 8100: clk_sel_val = 0x0200; hsclk_div_val = 0; break; } cdns_torrent_phy_write(cdns_phy->regmap_common_cdb, CMN_PDIAG_PLL0_CLK_SEL_M0, clk_sel_val); cdns_torrent_phy_write(cdns_phy->regmap_common_cdb, CMN_PDIAG_PLL1_CLK_SEL_M0, clk_sel_val); /* PMA lane configuration to deal with multi-link operation */ for (i = 0; i < num_lanes; i++) cdns_torrent_phy_write(cdns_phy->regmap_tx_lane_cdb[i], XCVR_DIAG_HSCLK_DIV, hsclk_div_val); } static void cdns_torrent_dp_pma_lane_cfg(struct cdns_torrent_phy *cdns_phy, unsigned int lane) { /* Per lane, refclock-dependent receiver detection setting */ if (cdns_phy->ref_clk_rate == REF_CLK_19_2MHz) cdns_torrent_phy_write(cdns_phy->regmap_tx_lane_cdb[lane], TX_RCVDET_ST_TMR, 0x0780); else if (cdns_phy->ref_clk_rate == REF_CLK_25MHz) cdns_torrent_phy_write(cdns_phy->regmap_tx_lane_cdb[lane], TX_RCVDET_ST_TMR, 0x09C4); /* Writing Tx/Rx Power State Controllers registers */ cdns_torrent_phy_write(cdns_phy->regmap_tx_lane_cdb[lane], TX_PSC_A0, 0x00FB); cdns_torrent_phy_write(cdns_phy->regmap_tx_lane_cdb[lane], TX_PSC_A2, 0x04AA); cdns_torrent_phy_write(cdns_phy->regmap_tx_lane_cdb[lane], TX_PSC_A3, 0x04AA); cdns_torrent_phy_write(cdns_phy->regmap_rx_lane_cdb[lane], RX_PSC_A0, 0x0000); cdns_torrent_phy_write(cdns_phy->regmap_rx_lane_cdb[lane], RX_PSC_A2, 0x0000); cdns_torrent_phy_write(cdns_phy->regmap_rx_lane_cdb[lane], RX_PSC_A3, 0x0000); cdns_torrent_phy_write(cdns_phy->regmap_rx_lane_cdb[lane], RX_PSC_CAL, 0x0000); cdns_torrent_phy_write(cdns_phy->regmap_rx_lane_cdb[lane], RX_REE_GCSM1_CTRL, 0x0000); cdns_torrent_phy_write(cdns_phy->regmap_rx_lane_cdb[lane], RX_REE_GCSM2_CTRL, 0x0000); cdns_torrent_phy_write(cdns_phy->regmap_rx_lane_cdb[lane], RX_REE_PERGCSM_CTRL, 0x0000); cdns_torrent_phy_write(cdns_phy->regmap_tx_lane_cdb[lane], XCVR_DIAG_BIDI_CTRL, 0x000F); cdns_torrent_phy_write(cdns_phy->regmap_tx_lane_cdb[lane], XCVR_DIAG_PLLDRC_CTRL, 0x0001); cdns_torrent_phy_write(cdns_phy->regmap_tx_lane_cdb[lane], XCVR_DIAG_HSCLK_SEL, 0x0000); } static int cdns_torrent_dp_set_power_state(struct cdns_torrent_phy *cdns_phy, u32 num_lanes, enum phy_powerstate powerstate) { /* Register value for power state for a single byte. */ u32 value_part; u32 value; u32 mask; u32 read_val; u32 ret; struct regmap *regmap = cdns_phy->regmap_dptx_phy_reg; switch (powerstate) { case (POWERSTATE_A0): value_part = 0x01U; break; case (POWERSTATE_A2): value_part = 0x04U; break; default: /* Powerstate A3 */ value_part = 0x08U; break; } /* Select values of registers and mask, depending on enabled * lane count. */ switch (num_lanes) { /* lane 0 */ case (1): value = value_part; mask = 0x0000003FU; break; /* lanes 0-1 */ case (2): value = (value_part | (value_part << 8)); mask = 0x00003F3FU; break; /* lanes 0-3, all */ default: value = (value_part | (value_part << 8) | (value_part << 16) | (value_part << 24)); mask = 0x3F3F3F3FU; break; } /* Set power state A<n>. */ cdns_torrent_dp_write(regmap, PHY_PMA_XCVR_POWER_STATE_REQ, value); /* Wait, until PHY acknowledges power state completion. */ ret = regmap_read_poll_timeout(regmap, PHY_PMA_XCVR_POWER_STATE_ACK, read_val, (read_val & mask) == value, 0, POLL_TIMEOUT_US); cdns_torrent_dp_write(regmap, PHY_PMA_XCVR_POWER_STATE_REQ, 0x00000000); ndelay(100); return ret; } static int cdns_torrent_dp_run(struct cdns_torrent_phy *cdns_phy, u32 num_lanes) { unsigned int read_val; int ret; struct regmap *regmap = cdns_phy->regmap_dptx_phy_reg; /* * waiting for ACK of pma_xcvr_pllclk_en_ln_*, only for the * master lane */ ret = regmap_read_poll_timeout(regmap, PHY_PMA_XCVR_PLLCLK_EN_ACK, read_val, read_val & 1, 0, POLL_TIMEOUT_US); if (ret == -ETIMEDOUT) { dev_err(cdns_phy->dev, "timeout waiting for link PLL clock enable ack\n"); return ret; } ndelay(100); ret = cdns_torrent_dp_set_power_state(cdns_phy, num_lanes, POWERSTATE_A2); if (ret) return ret; ret = cdns_torrent_dp_set_power_state(cdns_phy, num_lanes, POWERSTATE_A0); return ret; } static int cdns_torrent_phy_on(struct phy *phy) { struct cdns_torrent_inst *inst = phy_get_drvdata(phy); struct cdns_torrent_phy *cdns_phy = dev_get_drvdata(phy->dev.parent); int ret; /* Take the PHY out of reset */ ret = reset_control_deassert(cdns_phy->phy_rst); if (ret) return ret; /* Take the PHY lane group out of reset */ return reset_control_deassert(inst->lnk_rst); } static int cdns_torrent_phy_off(struct phy *phy) { struct cdns_torrent_inst *inst = phy_get_drvdata(phy); struct cdns_torrent_phy *cdns_phy = dev_get_drvdata(phy->dev.parent); int ret; ret = reset_control_assert(cdns_phy->phy_rst); if (ret) return ret; return reset_control_assert(inst->lnk_rst); } static struct regmap *cdns_regmap_init(struct device *dev, void __iomem *base, u32 block_offset, u8 reg_offset_shift, const struct regmap_config *config) { struct cdns_regmap_cdb_context *ctx; ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL); if (!ctx) return ERR_PTR(-ENOMEM); ctx->dev = dev; ctx->base = base + block_offset; ctx->reg_offset_shift = reg_offset_shift; return devm_regmap_init(dev, NULL, ctx, config); } static int cdns_regfield_init(struct cdns_torrent_phy *cdns_phy) { struct device *dev = cdns_phy->dev; struct regmap_field *field; struct regmap *regmap; regmap = cdns_phy->regmap_phy_pcs_common_cdb; field = devm_regmap_field_alloc(dev, regmap, phy_pll_cfg); if (IS_ERR(field)) { dev_err(dev, "PHY_PLL_CFG reg field init failed\n"); return PTR_ERR(field); } cdns_phy->phy_pll_cfg = field; regmap = cdns_phy->regmap_phy_pma_common_cdb; field = devm_regmap_field_alloc(dev, regmap, phy_pma_cmn_ctrl_2); if (IS_ERR(field)) { dev_err(dev, "PHY_PMA_CMN_CTRL2 reg field init failed\n"); return PTR_ERR(field); } cdns_phy->phy_pma_cmn_ctrl_2 = field; regmap = cdns_phy->regmap_phy_pma_common_cdb; field = devm_regmap_field_alloc(dev, regmap, phy_pma_pll_raw_ctrl); if (IS_ERR(field)) { dev_err(dev, "PHY_PMA_PLL_RAW_CTRL reg field init failed\n"); return PTR_ERR(field); } cdns_phy->phy_pma_pll_raw_ctrl = field; regmap = cdns_phy->regmap_dptx_phy_reg; field = devm_regmap_field_alloc(dev, regmap, phy_reset_ctrl); if (IS_ERR(field)) { dev_err(dev, "PHY_RESET reg field init failed\n"); return PTR_ERR(field); } cdns_phy->phy_reset_ctrl = field; return 0; } static int cdns_regmap_init_torrent_dp(struct cdns_torrent_phy *cdns_phy, void __iomem *sd_base, void __iomem *base, u8 block_offset_shift, u8 reg_offset_shift) { struct device *dev = cdns_phy->dev; struct regmap *regmap; u32 block_offset; int i; for (i = 0; i < MAX_NUM_LANES; i++) { block_offset = TORRENT_TX_LANE_CDB_OFFSET(i, block_offset_shift, reg_offset_shift); regmap = cdns_regmap_init(dev, sd_base, block_offset, reg_offset_shift, &cdns_torrent_tx_lane_cdb_config[i]); if (IS_ERR(regmap)) { dev_err(dev, "Failed to init tx lane CDB regmap\n"); return PTR_ERR(regmap); } cdns_phy->regmap_tx_lane_cdb[i] = regmap; block_offset = TORRENT_RX_LANE_CDB_OFFSET(i, block_offset_shift, reg_offset_shift); regmap = cdns_regmap_init(dev, sd_base, block_offset, reg_offset_shift, &cdns_torrent_rx_lane_cdb_config[i]); if (IS_ERR(regmap)) { dev_err(dev, "Failed to init rx lane CDB regmap\n"); return PTR_ERR(regmap); } cdns_phy->regmap_rx_lane_cdb[i] = regmap; } block_offset = TORRENT_COMMON_CDB_OFFSET; regmap = cdns_regmap_init(dev, sd_base, block_offset, reg_offset_shift, &cdns_torrent_common_cdb_config); if (IS_ERR(regmap)) { dev_err(dev, "Failed to init common CDB regmap\n"); return PTR_ERR(regmap); } cdns_phy->regmap_common_cdb = regmap; block_offset = TORRENT_PHY_PCS_COMMON_OFFSET(block_offset_shift); regmap = cdns_regmap_init(dev, sd_base, block_offset, reg_offset_shift, &cdns_torrent_phy_pcs_cmn_cdb_config); if (IS_ERR(regmap)) { dev_err(dev, "Failed to init PHY PCS common CDB regmap\n"); return PTR_ERR(regmap); } cdns_phy->regmap_phy_pcs_common_cdb = regmap; block_offset = TORRENT_PHY_PMA_COMMON_OFFSET(block_offset_shift); regmap = cdns_regmap_init(dev, sd_base, block_offset, reg_offset_shift, &cdns_torrent_phy_pma_cmn_cdb_config); if (IS_ERR(regmap)) { dev_err(dev, "Failed to init PHY PMA common CDB regmap\n"); return PTR_ERR(regmap); } cdns_phy->regmap_phy_pma_common_cdb = regmap; block_offset = TORRENT_DPTX_PHY_OFFSET; regmap = cdns_regmap_init(dev, base, block_offset, reg_offset_shift, &cdns_torrent_dptx_phy_config); if (IS_ERR(regmap)) { dev_err(dev, "Failed to init DPTX PHY regmap\n"); return PTR_ERR(regmap); } cdns_phy->regmap_dptx_phy_reg = regmap; return 0; } static int cdns_torrent_phy_probe(struct platform_device *pdev) { struct resource *regs; struct cdns_torrent_phy *cdns_phy; struct device *dev = &pdev->dev; struct phy_provider *phy_provider; const struct of_device_id *match; struct cdns_torrent_data *data; struct device_node *child; int ret, subnodes, node = 0, i; /* Get init data for this PHY */ match = of_match_device(cdns_torrent_phy_of_match, dev); if (!match) return -EINVAL; data = (struct cdns_torrent_data *)match->data; cdns_phy = devm_kzalloc(dev, sizeof(*cdns_phy), GFP_KERNEL); if (!cdns_phy) return -ENOMEM; dev_set_drvdata(dev, cdns_phy); cdns_phy->dev = dev; cdns_phy->phy_rst = devm_reset_control_get_exclusive_by_index(dev, 0); if (IS_ERR(cdns_phy->phy_rst)) { dev_err(dev, "%s: failed to get reset\n", dev->of_node->full_name); return PTR_ERR(cdns_phy->phy_rst); } cdns_phy->clk = devm_clk_get(dev, "refclk"); if (IS_ERR(cdns_phy->clk)) { dev_err(dev, "phy ref clock not found\n"); return PTR_ERR(cdns_phy->clk); } regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); cdns_phy->sd_base = devm_ioremap_resource(&pdev->dev, regs); if (IS_ERR(cdns_phy->sd_base)) return PTR_ERR(cdns_phy->sd_base); subnodes = of_get_available_child_count(dev->of_node); if (subnodes == 0) { dev_err(dev, "No available link subnodes found\n"); return -EINVAL; } else if (subnodes != 1) { dev_err(dev, "Driver supports only one link subnode.\n"); return -EINVAL; } for_each_available_child_of_node(dev->of_node, child) { struct phy *gphy; cdns_phy->phys[node].lnk_rst = of_reset_control_array_get_exclusive(child); if (IS_ERR(cdns_phy->phys[node].lnk_rst)) { dev_err(dev, "%s: failed to get reset\n", child->full_name); ret = PTR_ERR(cdns_phy->phys[node].lnk_rst); goto put_lnk_rst; } if (of_property_read_u32(child, "reg", &cdns_phy->phys[node].mlane)) { dev_err(dev, "%s: No \"reg\"-property.\n", child->full_name); ret = -EINVAL; goto put_child; } if (cdns_phy->phys[node].mlane != 0) { dev_err(dev, "%s: Driver supports only lane-0 as master lane.\n", child->full_name); ret = -EINVAL; goto put_child; } if (of_property_read_u32(child, "cdns,phy-type", &cdns_phy->phys[node].phy_type)) { dev_err(dev, "%s: No \"cdns,phy-type\"-property.\n", child->full_name); ret = -EINVAL; goto put_child; } cdns_phy->phys[node].num_lanes = DEFAULT_NUM_LANES; of_property_read_u32(child, "cdns,num-lanes", &cdns_phy->phys[node].num_lanes); if (cdns_phy->phys[node].phy_type == PHY_TYPE_DP) { switch (cdns_phy->phys[node].num_lanes) { case 1: case 2: case 4: /* valid number of lanes */ break; default: dev_err(dev, "unsupported number of lanes: %d\n", cdns_phy->phys[node].num_lanes); ret = -EINVAL; goto put_child; } cdns_phy->max_bit_rate = DEFAULT_MAX_BIT_RATE; of_property_read_u32(child, "cdns,max-bit-rate", &cdns_phy->max_bit_rate); switch (cdns_phy->max_bit_rate) { case 1620: case 2160: case 2430: case 2700: case 3240: case 4320: case 5400: case 8100: /* valid bit rate */ break; default: dev_err(dev, "unsupported max bit rate: %dMbps\n", cdns_phy->max_bit_rate); ret = -EINVAL; goto put_child; } /* DPTX registers */ regs = platform_get_resource(pdev, IORESOURCE_MEM, 1); cdns_phy->base = devm_ioremap_resource(&pdev->dev, regs); if (IS_ERR(cdns_phy->base)) { ret = PTR_ERR(cdns_phy->base); goto put_child; } gphy = devm_phy_create(dev, child, &cdns_torrent_phy_ops); if (IS_ERR(gphy)) { ret = PTR_ERR(gphy); goto put_child; } dev_info(dev, "%d lanes, max bit rate %d.%03d Gbps\n", cdns_phy->phys[node].num_lanes, cdns_phy->max_bit_rate / 1000, cdns_phy->max_bit_rate % 1000); } else { dev_err(dev, "Driver supports only PHY_TYPE_DP\n"); ret = -ENOTSUPP; goto put_child; } cdns_phy->phys[node].phy = gphy; phy_set_drvdata(gphy, &cdns_phy->phys[node]); node++; } cdns_phy->nsubnodes = node; ret = cdns_regmap_init_torrent_dp(cdns_phy, cdns_phy->sd_base, cdns_phy->base, data->block_offset_shift, data->reg_offset_shift); if (ret) goto put_lnk_rst; ret = cdns_regfield_init(cdns_phy); if (ret) goto put_lnk_rst; phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate); if (IS_ERR(phy_provider)) { ret = PTR_ERR(phy_provider); goto put_lnk_rst; } return 0; put_child: node++; put_lnk_rst: for (i = 0; i < node; i++) reset_control_put(cdns_phy->phys[i].lnk_rst); of_node_put(child); return ret; } static int cdns_torrent_phy_remove(struct platform_device *pdev) { struct cdns_torrent_phy *cdns_phy = platform_get_drvdata(pdev); int i; reset_control_assert(cdns_phy->phy_rst); for (i = 0; i < cdns_phy->nsubnodes; i++) { reset_control_assert(cdns_phy->phys[i].lnk_rst); reset_control_put(cdns_phy->phys[i].lnk_rst); } return 0; } static const struct cdns_torrent_data cdns_map_torrent = { .block_offset_shift = 0x2, .reg_offset_shift = 0x2, }; static const struct cdns_torrent_data ti_j721e_map_torrent = { .block_offset_shift = 0x0, .reg_offset_shift = 0x1, }; static const struct of_device_id cdns_torrent_phy_of_match[] = { { .compatible = "cdns,torrent-phy", .data = &cdns_map_torrent, }, { .compatible = "ti,j721e-serdes-10g", .data = &ti_j721e_map_torrent, }, {} }; MODULE_DEVICE_TABLE(of, cdns_torrent_phy_of_match); static struct platform_driver cdns_torrent_phy_driver = { .probe = cdns_torrent_phy_probe, .remove = cdns_torrent_phy_remove, .driver = { .name = "cdns-torrent-phy", .of_match_table = cdns_torrent_phy_of_match, } }; module_platform_driver(cdns_torrent_phy_driver); MODULE_AUTHOR("Cadence Design Systems, Inc."); MODULE_DESCRIPTION("Cadence Torrent PHY driver"); MODULE_LICENSE("GPL v2");
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