// SPDX-License-Identifier: GPL-2.0+ /* * Copyright (C) 2017 Texas Instruments Incorporated - http://www.ti.com/ * Written by Jean-Jacques Hiblot */ #include #include #include #include #include #include #include #include #include #include #include #include #include /* PLLCTRL Registers */ #define PLL_STATUS 0x00000004 #define PLL_GO 0x00000008 #define PLL_CONFIGURATION1 0x0000000C #define PLL_CONFIGURATION2 0x00000010 #define PLL_CONFIGURATION3 0x00000014 #define PLL_CONFIGURATION4 0x00000020 #define PLL_REGM_MASK 0x001FFE00 #define PLL_REGM_SHIFT 9 #define PLL_REGM_F_MASK 0x0003FFFF #define PLL_REGM_F_SHIFT 0 #define PLL_REGN_MASK 0x000001FE #define PLL_REGN_SHIFT 1 #define PLL_SELFREQDCO_MASK 0x0000000E #define PLL_SELFREQDCO_SHIFT 1 #define PLL_SD_MASK 0x0003FC00 #define PLL_SD_SHIFT 10 #define SET_PLL_GO 0x1 #define PLL_TICOPWDN BIT(16) #define PLL_LDOPWDN BIT(15) #define PLL_LOCK 0x2 #define PLL_IDLE 0x1 /* Software rest for the SATA PLL (in CTRL_CORE_SMA_SW_0 register)*/ #define SATA_PLL_SOFT_RESET (1<<18) /* PHY POWER CONTROL Register */ #define PIPE3_PHY_PWRCTL_CLK_CMD_MASK GENMASK(21, 14) #define PIPE3_PHY_PWRCTL_CLK_CMD_SHIFT 14 #define PIPE3_PHY_PWRCTL_CLK_FREQ_MASK GENMASK(31, 22) #define PIPE3_PHY_PWRCTL_CLK_FREQ_SHIFT 22 #define PIPE3_PHY_RX_POWERON (0x1 << PIPE3_PHY_PWRCTL_CLK_CMD_SHIFT) #define PIPE3_PHY_TX_POWERON (0x2 << PIPE3_PHY_PWRCTL_CLK_CMD_SHIFT) /* PHY RX Registers */ #define PIPE3_PHY_RX_ANA_PROGRAMMABILITY 0x0000000C #define INTERFACE_MASK GENMASK(31, 27) #define INTERFACE_SHIFT 27 #define INTERFACE_MODE_USBSS BIT(4) #define INTERFACE_MODE_SATA_1P5 BIT(3) #define INTERFACE_MODE_SATA_3P0 BIT(2) #define INTERFACE_MODE_PCIE BIT(0) #define LOSD_MASK GENMASK(17, 14) #define LOSD_SHIFT 14 #define MEM_PLLDIV GENMASK(6, 5) #define PIPE3_PHY_RX_TRIM 0x0000001C #define MEM_DLL_TRIM_SEL_MASK GENMASK(31, 30) #define MEM_DLL_TRIM_SHIFT 30 #define PIPE3_PHY_RX_DLL 0x00000024 #define MEM_DLL_PHINT_RATE_MASK GENMASK(31, 30) #define MEM_DLL_PHINT_RATE_SHIFT 30 #define PIPE3_PHY_RX_DIGITAL_MODES 0x00000028 #define MEM_HS_RATE_MASK GENMASK(28, 27) #define MEM_HS_RATE_SHIFT 27 #define MEM_OVRD_HS_RATE BIT(26) #define MEM_OVRD_HS_RATE_SHIFT 26 #define MEM_CDR_FASTLOCK BIT(23) #define MEM_CDR_FASTLOCK_SHIFT 23 #define MEM_CDR_LBW_MASK GENMASK(22, 21) #define MEM_CDR_LBW_SHIFT 21 #define MEM_CDR_STEPCNT_MASK GENMASK(20, 19) #define MEM_CDR_STEPCNT_SHIFT 19 #define MEM_CDR_STL_MASK GENMASK(18, 16) #define MEM_CDR_STL_SHIFT 16 #define MEM_CDR_THR_MASK GENMASK(15, 13) #define MEM_CDR_THR_SHIFT 13 #define MEM_CDR_THR_MODE BIT(12) #define MEM_CDR_THR_MODE_SHIFT 12 #define MEM_CDR_2NDO_SDM_MODE BIT(11) #define MEM_CDR_2NDO_SDM_MODE_SHIFT 11 #define PIPE3_PHY_RX_EQUALIZER 0x00000038 #define MEM_EQLEV_MASK GENMASK(31, 16) #define MEM_EQLEV_SHIFT 16 #define MEM_EQFTC_MASK GENMASK(15, 11) #define MEM_EQFTC_SHIFT 11 #define MEM_EQCTL_MASK GENMASK(10, 7) #define MEM_EQCTL_SHIFT 7 #define MEM_OVRD_EQLEV BIT(2) #define MEM_OVRD_EQLEV_SHIFT 2 #define MEM_OVRD_EQFTC BIT(1) #define MEM_OVRD_EQFTC_SHIFT 1 #define SATA_PHY_RX_IO_AND_A2D_OVERRIDES 0x44 #define MEM_CDR_LOS_SOURCE_MASK GENMASK(10, 9) #define MEM_CDR_LOS_SOURCE_SHIFT 9 #define PLL_IDLE_TIME 100 /* in milliseconds */ #define PLL_LOCK_TIME 100 /* in milliseconds */ enum pipe3_mode { PIPE3_MODE_PCIE = 1, PIPE3_MODE_SATA, PIPE3_MODE_USBSS }; struct pipe3_settings { u8 ana_interface; u8 ana_losd; u8 dig_fastlock; u8 dig_lbw; u8 dig_stepcnt; u8 dig_stl; u8 dig_thr; u8 dig_thr_mode; u8 dig_2ndo_sdm_mode; u8 dig_hs_rate; u8 dig_ovrd_hs_rate; u8 dll_trim_sel; u8 dll_phint_rate; u8 eq_lev; u8 eq_ftc; u8 eq_ctl; u8 eq_ovrd_lev; u8 eq_ovrd_ftc; }; struct omap_pipe3 { void __iomem *pll_ctrl_base; void __iomem *phy_rx; void __iomem *power_reg; void __iomem *pll_reset_reg; struct pipe3_dpll_map *dpll_map; enum pipe3_mode mode; struct pipe3_settings settings; }; struct pipe3_dpll_params { u16 m; u8 n; u8 freq:3; u8 sd; u32 mf; }; struct pipe3_dpll_map { unsigned long rate; struct pipe3_dpll_params params; }; struct pipe3_data { enum pipe3_mode mode; struct pipe3_dpll_map *dpll_map; struct pipe3_settings settings; }; static inline u32 omap_pipe3_readl(void __iomem *addr, unsigned offset) { return readl(addr + offset); } static inline void omap_pipe3_writel(void __iomem *addr, unsigned offset, u32 data) { writel(data, addr + offset); } static struct pipe3_dpll_params *omap_pipe3_get_dpll_params(struct omap_pipe3 *pipe3) { u32 rate; struct pipe3_dpll_map *dpll_map = pipe3->dpll_map; rate = get_sys_clk_freq(); for (; dpll_map->rate; dpll_map++) { if (rate == dpll_map->rate) return &dpll_map->params; } printf("%s: No DPLL configuration for %u Hz SYS CLK\n", __func__, rate); return NULL; } static int omap_pipe3_wait_lock(struct omap_pipe3 *pipe3) { u32 val; int timeout = PLL_LOCK_TIME; do { mdelay(1); val = omap_pipe3_readl(pipe3->pll_ctrl_base, PLL_STATUS); if (val & PLL_LOCK) break; } while (--timeout); if (!(val & PLL_LOCK)) { printf("%s: DPLL failed to lock\n", __func__); return -EBUSY; } return 0; } static int omap_pipe3_dpll_program(struct omap_pipe3 *pipe3) { u32 val; struct pipe3_dpll_params *dpll_params; dpll_params = omap_pipe3_get_dpll_params(pipe3); if (!dpll_params) { printf("%s: Invalid DPLL parameters\n", __func__); return -EINVAL; } val = omap_pipe3_readl(pipe3->pll_ctrl_base, PLL_CONFIGURATION1); val &= ~PLL_REGN_MASK; val |= dpll_params->n << PLL_REGN_SHIFT; omap_pipe3_writel(pipe3->pll_ctrl_base, PLL_CONFIGURATION1, val); val = omap_pipe3_readl(pipe3->pll_ctrl_base, PLL_CONFIGURATION2); val &= ~(PLL_SELFREQDCO_MASK | PLL_IDLE); val |= dpll_params->freq << PLL_SELFREQDCO_SHIFT; omap_pipe3_writel(pipe3->pll_ctrl_base, PLL_CONFIGURATION2, val); val = omap_pipe3_readl(pipe3->pll_ctrl_base, PLL_CONFIGURATION1); val &= ~PLL_REGM_MASK; val |= dpll_params->m << PLL_REGM_SHIFT; omap_pipe3_writel(pipe3->pll_ctrl_base, PLL_CONFIGURATION1, val); val = omap_pipe3_readl(pipe3->pll_ctrl_base, PLL_CONFIGURATION4); val &= ~PLL_REGM_F_MASK; val |= dpll_params->mf << PLL_REGM_F_SHIFT; omap_pipe3_writel(pipe3->pll_ctrl_base, PLL_CONFIGURATION4, val); val = omap_pipe3_readl(pipe3->pll_ctrl_base, PLL_CONFIGURATION3); val &= ~PLL_SD_MASK; val |= dpll_params->sd << PLL_SD_SHIFT; omap_pipe3_writel(pipe3->pll_ctrl_base, PLL_CONFIGURATION3, val); omap_pipe3_writel(pipe3->pll_ctrl_base, PLL_GO, SET_PLL_GO); return omap_pipe3_wait_lock(pipe3); } static void omap_control_pipe3_power(struct omap_pipe3 *pipe3, int on) { u32 val, rate; val = readl(pipe3->power_reg); rate = get_sys_clk_freq(); rate = rate/1000000; if (on) { val &= ~(PIPE3_PHY_PWRCTL_CLK_CMD_MASK | PIPE3_PHY_PWRCTL_CLK_FREQ_MASK); val |= rate << PIPE3_PHY_PWRCTL_CLK_FREQ_SHIFT; writel(val, pipe3->power_reg); /* Power up TX before RX for SATA & USB */ val |= PIPE3_PHY_TX_POWERON; writel(val, pipe3->power_reg); val |= PIPE3_PHY_RX_POWERON; writel(val, pipe3->power_reg); } else { val &= ~PIPE3_PHY_PWRCTL_CLK_CMD_MASK; writel(val, pipe3->power_reg); } } static void ti_pipe3_calibrate(struct omap_pipe3 *phy) { u32 val; struct pipe3_settings *s = &phy->settings; val = omap_pipe3_readl(phy->phy_rx, PIPE3_PHY_RX_ANA_PROGRAMMABILITY); val &= ~(INTERFACE_MASK | LOSD_MASK | MEM_PLLDIV); val = (s->ana_interface << INTERFACE_SHIFT | s->ana_losd << LOSD_SHIFT); omap_pipe3_writel(phy->phy_rx, PIPE3_PHY_RX_ANA_PROGRAMMABILITY, val); val = omap_pipe3_readl(phy->phy_rx, PIPE3_PHY_RX_DIGITAL_MODES); val &= ~(MEM_HS_RATE_MASK | MEM_OVRD_HS_RATE | MEM_CDR_FASTLOCK | MEM_CDR_LBW_MASK | MEM_CDR_STEPCNT_MASK | MEM_CDR_STL_MASK | MEM_CDR_THR_MASK | MEM_CDR_THR_MODE | MEM_CDR_2NDO_SDM_MODE); val |= s->dig_hs_rate << MEM_HS_RATE_SHIFT | s->dig_ovrd_hs_rate << MEM_OVRD_HS_RATE_SHIFT | s->dig_fastlock << MEM_CDR_FASTLOCK_SHIFT | s->dig_lbw << MEM_CDR_LBW_SHIFT | s->dig_stepcnt << MEM_CDR_STEPCNT_SHIFT | s->dig_stl << MEM_CDR_STL_SHIFT | s->dig_thr << MEM_CDR_THR_SHIFT | s->dig_thr_mode << MEM_CDR_THR_MODE_SHIFT | s->dig_2ndo_sdm_mode << MEM_CDR_2NDO_SDM_MODE_SHIFT; omap_pipe3_writel(phy->phy_rx, PIPE3_PHY_RX_DIGITAL_MODES, val); val = omap_pipe3_readl(phy->phy_rx, PIPE3_PHY_RX_TRIM); val &= ~MEM_DLL_TRIM_SEL_MASK; val |= s->dll_trim_sel << MEM_DLL_TRIM_SHIFT; omap_pipe3_writel(phy->phy_rx, PIPE3_PHY_RX_TRIM, val); val = omap_pipe3_readl(phy->phy_rx, PIPE3_PHY_RX_DLL); val &= ~MEM_DLL_PHINT_RATE_MASK; val |= s->dll_phint_rate << MEM_DLL_PHINT_RATE_SHIFT; omap_pipe3_writel(phy->phy_rx, PIPE3_PHY_RX_DLL, val); val = omap_pipe3_readl(phy->phy_rx, PIPE3_PHY_RX_EQUALIZER); val &= ~(MEM_EQLEV_MASK | MEM_EQFTC_MASK | MEM_EQCTL_MASK | MEM_OVRD_EQLEV | MEM_OVRD_EQFTC); val |= s->eq_lev << MEM_EQLEV_SHIFT | s->eq_ftc << MEM_EQFTC_SHIFT | s->eq_ctl << MEM_EQCTL_SHIFT | s->eq_ovrd_lev << MEM_OVRD_EQLEV_SHIFT | s->eq_ovrd_ftc << MEM_OVRD_EQFTC_SHIFT; omap_pipe3_writel(phy->phy_rx, PIPE3_PHY_RX_EQUALIZER, val); if (phy->mode == PIPE3_MODE_SATA) { val = omap_pipe3_readl(phy->phy_rx, SATA_PHY_RX_IO_AND_A2D_OVERRIDES); val &= ~MEM_CDR_LOS_SOURCE_MASK; omap_pipe3_writel(phy->phy_rx, SATA_PHY_RX_IO_AND_A2D_OVERRIDES, val); } } static int pipe3_init(struct phy *phy) { int ret; u32 val; struct omap_pipe3 *pipe3 = dev_get_priv(phy->dev); /* Program the DPLL only if not locked */ val = omap_pipe3_readl(pipe3->pll_ctrl_base, PLL_STATUS); if (!(val & PLL_LOCK)) { ret = omap_pipe3_dpll_program(pipe3); if (ret) return ret; ti_pipe3_calibrate(pipe3); } else { /* else just bring it out of IDLE mode */ val = omap_pipe3_readl(pipe3->pll_ctrl_base, PLL_CONFIGURATION2); if (val & PLL_IDLE) { val &= ~PLL_IDLE; omap_pipe3_writel(pipe3->pll_ctrl_base, PLL_CONFIGURATION2, val); ret = omap_pipe3_wait_lock(pipe3); if (ret) return ret; } } return 0; } static int pipe3_power_on(struct phy *phy) { struct omap_pipe3 *pipe3 = dev_get_priv(phy->dev); /* Power up the PHY */ omap_control_pipe3_power(pipe3, 1); return 0; } static int pipe3_power_off(struct phy *phy) { struct omap_pipe3 *pipe3 = dev_get_priv(phy->dev); /* Power down the PHY */ omap_control_pipe3_power(pipe3, 0); return 0; } static int pipe3_exit(struct phy *phy) { u32 val; int timeout = PLL_IDLE_TIME; struct omap_pipe3 *pipe3 = dev_get_priv(phy->dev); pipe3_power_off(phy); /* Put DPLL in IDLE mode */ val = omap_pipe3_readl(pipe3->pll_ctrl_base, PLL_CONFIGURATION2); val |= PLL_IDLE; omap_pipe3_writel(pipe3->pll_ctrl_base, PLL_CONFIGURATION2, val); /* wait for LDO and Oscillator to power down */ do { mdelay(1); val = omap_pipe3_readl(pipe3->pll_ctrl_base, PLL_STATUS); if ((val & PLL_TICOPWDN) && (val & PLL_LDOPWDN)) break; } while (--timeout); if (!(val & PLL_TICOPWDN) || !(val & PLL_LDOPWDN)) { pr_err("%s: Failed to power down DPLL: PLL_STATUS 0x%x\n", __func__, val); return -EBUSY; } if (pipe3->pll_reset_reg) { val = readl(pipe3->pll_reset_reg); writel(val | SATA_PLL_SOFT_RESET, pipe3->pll_reset_reg); mdelay(1); writel(val & ~SATA_PLL_SOFT_RESET, pipe3->pll_reset_reg); } return 0; } static void *get_reg(struct udevice *dev, const char *name) { struct udevice *syscon; struct regmap *regmap; const fdt32_t *cell; int len, err; void *base; err = uclass_get_device_by_phandle(UCLASS_SYSCON, dev, name, &syscon); if (err) { pr_err("unable to find syscon device for %s (%d)\n", name, err); return NULL; } regmap = syscon_get_regmap(syscon); if (IS_ERR(regmap)) { pr_err("unable to find regmap for %s (%ld)\n", name, PTR_ERR(regmap)); return NULL; } cell = fdt_getprop(gd->fdt_blob, dev_of_offset(dev), name, &len); if (len < 2*sizeof(fdt32_t)) { pr_err("offset not available for %s\n", name); return NULL; } base = regmap_get_range(regmap, 0); if (!base) return NULL; return fdtdec_get_number(cell + 1, 1) + base; } static int pipe3_phy_probe(struct udevice *dev) { fdt_addr_t addr; fdt_size_t sz; struct omap_pipe3 *pipe3 = dev_get_priv(dev); struct pipe3_data *data; /* PHY_RX */ addr = devfdt_get_addr_size_index(dev, 0, &sz); if (addr == FDT_ADDR_T_NONE) { pr_err("missing phy_rx address\n"); return -EINVAL; } pipe3->phy_rx = map_physmem(addr, sz, MAP_NOCACHE); if (!pipe3->phy_rx) { pr_err("unable to remap phy_rx\n"); return -EINVAL; } /* PLLCTRL */ addr = devfdt_get_addr_size_index(dev, 2, &sz); if (addr == FDT_ADDR_T_NONE) { pr_err("missing pll ctrl address\n"); return -EINVAL; } pipe3->pll_ctrl_base = map_physmem(addr, sz, MAP_NOCACHE); if (!pipe3->pll_ctrl_base) { pr_err("unable to remap pll ctrl\n"); return -EINVAL; } pipe3->power_reg = get_reg(dev, "syscon-phy-power"); if (!pipe3->power_reg) return -EINVAL; data = (struct pipe3_data *)dev_get_driver_data(dev); pipe3->mode = data->mode; pipe3->dpll_map = data->dpll_map; pipe3->settings = data->settings; if (pipe3->mode == PIPE3_MODE_SATA) { pipe3->pll_reset_reg = get_reg(dev, "syscon-pllreset"); if (!pipe3->pll_reset_reg) return -EINVAL; } return 0; } static struct pipe3_dpll_map dpll_map_sata[] = { {12000000, {625, 4, 4, 6, 0} }, /* 12 MHz */ {16800000, {625, 6, 4, 7, 0} }, /* 16.8 MHz */ {19200000, {625, 7, 4, 6, 0} }, /* 19.2 MHz */ {20000000, {750, 9, 4, 6, 0} }, /* 20 MHz */ {26000000, {750, 12, 4, 6, 0} }, /* 26 MHz */ {38400000, {625, 15, 4, 6, 0} }, /* 38.4 MHz */ { }, /* Terminator */ }; static struct pipe3_dpll_map dpll_map_usb[] = { {12000000, {1250, 5, 4, 20, 0} }, /* 12 MHz */ {16800000, {3125, 20, 4, 20, 0} }, /* 16.8 MHz */ {19200000, {1172, 8, 4, 20, 65537} }, /* 19.2 MHz */ {20000000, {1000, 7, 4, 10, 0} }, /* 20 MHz */ {26000000, {1250, 12, 4, 20, 0} }, /* 26 MHz */ {38400000, {3125, 47, 4, 20, 92843} }, /* 38.4 MHz */ { }, /* Terminator */ }; static struct pipe3_data data_usb = { .mode = PIPE3_MODE_USBSS, .dpll_map = dpll_map_usb, .settings = { /* DRA75x TRM Table 26-17. Preferred USB3_PHY_RX SCP Register Settings */ .ana_interface = INTERFACE_MODE_USBSS, .ana_losd = 0xa, .dig_fastlock = 1, .dig_lbw = 3, .dig_stepcnt = 0, .dig_stl = 0x3, .dig_thr = 1, .dig_thr_mode = 1, .dig_2ndo_sdm_mode = 0, .dig_hs_rate = 0, .dig_ovrd_hs_rate = 1, .dll_trim_sel = 0x2, .dll_phint_rate = 0x3, .eq_lev = 0, .eq_ftc = 0, .eq_ctl = 0x9, .eq_ovrd_lev = 0, .eq_ovrd_ftc = 0, }, }; static struct pipe3_data data_sata = { .mode = PIPE3_MODE_SATA, .dpll_map = dpll_map_sata, .settings = { /* DRA75x TRM Table 26-9. Preferred SATA_PHY_RX SCP Register Settings */ .ana_interface = INTERFACE_MODE_SATA_3P0, .ana_losd = 0x5, .dig_fastlock = 1, .dig_lbw = 3, .dig_stepcnt = 0, .dig_stl = 0x3, .dig_thr = 1, .dig_thr_mode = 1, .dig_2ndo_sdm_mode = 0, .dig_hs_rate = 0, /* Not in TRM preferred settings */ .dig_ovrd_hs_rate = 0, /* Not in TRM preferred settings */ .dll_trim_sel = 0x1, .dll_phint_rate = 0x2, /* for 1.5 GHz DPLL clock */ .eq_lev = 0, .eq_ftc = 0x1f, .eq_ctl = 0, .eq_ovrd_lev = 1, .eq_ovrd_ftc = 1, }, }; static const struct udevice_id pipe3_phy_ids[] = { { .compatible = "ti,phy-pipe3-sata", .data = (ulong)&data_sata }, { .compatible = "ti,omap-usb3", .data = (ulong)&data_usb}, { } }; static struct phy_ops pipe3_phy_ops = { .init = pipe3_init, .power_on = pipe3_power_on, .power_off = pipe3_power_off, .exit = pipe3_exit, }; U_BOOT_DRIVER(pipe3_phy) = { .name = "pipe3_phy", .id = UCLASS_PHY, .of_match = pipe3_phy_ids, .ops = &pipe3_phy_ops, .probe = pipe3_phy_probe, .priv_auto = sizeof(struct omap_pipe3), };