FILE
phy-ti-pipe3.c
File preview with syntax highlighting.
linux-6.19.14/drivers/phy/ti/phy-ti-pipe3.c
1// SPDX-License-Identifier: GPL-2.0-or-later 2/* 3 * phy-ti-pipe3 - PIPE3 PHY driver. 4 * 5 * Copyright (C) 2013 Texas Instruments Incorporated - http://www.ti.com 6 * Author: Kishon Vijay Abraham I <kishon@ti.com> 7 */ 8 9#include <linux/module.h> 10#include <linux/platform_device.h> 11#include <linux/property.h> 12#include <linux/slab.h> 13#include <linux/phy/phy.h> 14#include <linux/of.h> 15#include <linux/clk.h> 16#include <linux/err.h> 17#include <linux/io.h> 18#include <linux/pm_runtime.h> 19#include <linux/delay.h> 20#include <linux/phy/omap_control_phy.h> 21#include <linux/of_platform.h> 22#include <linux/mfd/syscon.h> 23#include <linux/regmap.h> 24 25#define PLL_STATUS 0x00000004 26#define PLL_GO 0x00000008 27#define PLL_CONFIGURATION1 0x0000000C 28#define PLL_CONFIGURATION2 0x00000010 29#define PLL_CONFIGURATION3 0x00000014 30#define PLL_CONFIGURATION4 0x00000020 31 32#define PLL_REGM_MASK 0x001FFE00 33#define PLL_REGM_SHIFT 0x9 34#define PLL_REGM_F_MASK 0x0003FFFF 35#define PLL_REGM_F_SHIFT 0x0 36#define PLL_REGN_MASK 0x000001FE 37#define PLL_REGN_SHIFT 0x1 38#define PLL_SELFREQDCO_MASK 0x0000000E 39#define PLL_SELFREQDCO_SHIFT 0x1 40#define PLL_SD_MASK 0x0003FC00 41#define PLL_SD_SHIFT 10 42#define SET_PLL_GO 0x1 43#define PLL_LDOPWDN BIT(15) 44#define PLL_TICOPWDN BIT(16) 45#define PLL_LOCK 0x2 46#define PLL_IDLE 0x1 47 48#define SATA_PLL_SOFT_RESET BIT(18) 49 50#define PIPE3_PHY_PWRCTL_CLK_CMD_MASK GENMASK(21, 14) 51#define PIPE3_PHY_PWRCTL_CLK_CMD_SHIFT 14 52 53#define PIPE3_PHY_PWRCTL_CLK_FREQ_MASK GENMASK(31, 22) 54#define PIPE3_PHY_PWRCTL_CLK_FREQ_SHIFT 22 55 56#define PIPE3_PHY_RX_POWERON (0x1 << PIPE3_PHY_PWRCTL_CLK_CMD_SHIFT) 57#define PIPE3_PHY_TX_POWERON (0x2 << PIPE3_PHY_PWRCTL_CLK_CMD_SHIFT) 58 59#define PCIE_PCS_MASK 0xFF0000 60#define PCIE_PCS_DELAY_COUNT_SHIFT 0x10 61 62#define PIPE3_PHY_RX_ANA_PROGRAMMABILITY 0x0000000C 63#define INTERFACE_MASK GENMASK(31, 27) 64#define INTERFACE_SHIFT 27 65#define INTERFACE_MODE_USBSS BIT(4) 66#define INTERFACE_MODE_SATA_1P5 BIT(3) 67#define INTERFACE_MODE_SATA_3P0 BIT(2) 68#define INTERFACE_MODE_PCIE BIT(0) 69 70#define LOSD_MASK GENMASK(17, 14) 71#define LOSD_SHIFT 14 72#define MEM_PLLDIV GENMASK(6, 5) 73 74#define PIPE3_PHY_RX_TRIM 0x0000001C 75#define MEM_DLL_TRIM_SEL_MASK GENMASK(31, 30) 76#define MEM_DLL_TRIM_SHIFT 30 77 78#define PIPE3_PHY_RX_DLL 0x00000024 79#define MEM_DLL_PHINT_RATE_MASK GENMASK(31, 30) 80#define MEM_DLL_PHINT_RATE_SHIFT 30 81 82#define PIPE3_PHY_RX_DIGITAL_MODES 0x00000028 83#define MEM_HS_RATE_MASK GENMASK(28, 27) 84#define MEM_HS_RATE_SHIFT 27 85#define MEM_OVRD_HS_RATE BIT(26) 86#define MEM_OVRD_HS_RATE_SHIFT 26 87#define MEM_CDR_FASTLOCK BIT(23) 88#define MEM_CDR_FASTLOCK_SHIFT 23 89#define MEM_CDR_LBW_MASK GENMASK(22, 21) 90#define MEM_CDR_LBW_SHIFT 21 91#define MEM_CDR_STEPCNT_MASK GENMASK(20, 19) 92#define MEM_CDR_STEPCNT_SHIFT 19 93#define MEM_CDR_STL_MASK GENMASK(18, 16) 94#define MEM_CDR_STL_SHIFT 16 95#define MEM_CDR_THR_MASK GENMASK(15, 13) 96#define MEM_CDR_THR_SHIFT 13 97#define MEM_CDR_THR_MODE BIT(12) 98#define MEM_CDR_THR_MODE_SHIFT 12 99#define MEM_CDR_2NDO_SDM_MODE BIT(11) 100#define MEM_CDR_2NDO_SDM_MODE_SHIFT 11 101 102#define PIPE3_PHY_RX_EQUALIZER 0x00000038 103#define MEM_EQLEV_MASK GENMASK(31, 16) 104#define MEM_EQLEV_SHIFT 16 105#define MEM_EQFTC_MASK GENMASK(15, 11) 106#define MEM_EQFTC_SHIFT 11 107#define MEM_EQCTL_MASK GENMASK(10, 7) 108#define MEM_EQCTL_SHIFT 7 109#define MEM_OVRD_EQLEV BIT(2) 110#define MEM_OVRD_EQLEV_SHIFT 2 111#define MEM_OVRD_EQFTC BIT(1) 112#define MEM_OVRD_EQFTC_SHIFT 1 113 114#define SATA_PHY_RX_IO_AND_A2D_OVERRIDES 0x44 115#define MEM_CDR_LOS_SOURCE_MASK GENMASK(10, 9) 116#define MEM_CDR_LOS_SOURCE_SHIFT 9 117 118/* 119 * This is an Empirical value that works, need to confirm the actual 120 * value required for the PIPE3PHY_PLL_CONFIGURATION2.PLL_IDLE status 121 * to be correctly reflected in the PIPE3PHY_PLL_STATUS register. 122 */ 123#define PLL_IDLE_TIME 100 /* in milliseconds */ 124#define PLL_LOCK_TIME 100 /* in milliseconds */ 125 126enum pipe3_mode { PIPE3_MODE_PCIE = 1, 127 PIPE3_MODE_SATA, 128 PIPE3_MODE_USBSS }; 129 130struct pipe3_dpll_params { 131 u16 m; 132 u8 n; 133 u8 freq:3; 134 u8 sd; 135 u32 mf; 136}; 137 138struct pipe3_dpll_map { 139 unsigned long rate; 140 struct pipe3_dpll_params params; 141}; 142 143struct pipe3_settings { 144 u8 ana_interface; 145 u8 ana_losd; 146 u8 dig_fastlock; 147 u8 dig_lbw; 148 u8 dig_stepcnt; 149 u8 dig_stl; 150 u8 dig_thr; 151 u8 dig_thr_mode; 152 u8 dig_2ndo_sdm_mode; 153 u8 dig_hs_rate; 154 u8 dig_ovrd_hs_rate; 155 u8 dll_trim_sel; 156 u8 dll_phint_rate; 157 u8 eq_lev; 158 u8 eq_ftc; 159 u8 eq_ctl; 160 u8 eq_ovrd_lev; 161 u8 eq_ovrd_ftc; 162}; 163 164struct ti_pipe3 { 165 void __iomem *pll_ctrl_base; 166 void __iomem *phy_rx; 167 void __iomem *phy_tx; 168 struct device *dev; 169 struct device *control_dev; 170 struct clk *wkupclk; 171 struct clk *sys_clk; 172 struct clk *refclk; 173 struct clk *div_clk; 174 struct pipe3_dpll_map *dpll_map; 175 struct regmap *phy_power_syscon; /* ctrl. reg. acces */ 176 struct regmap *pcs_syscon; /* ctrl. reg. acces */ 177 struct regmap *dpll_reset_syscon; /* ctrl. reg. acces */ 178 unsigned int dpll_reset_reg; /* reg. index within syscon */ 179 unsigned int power_reg; /* power reg. index within syscon */ 180 unsigned int pcie_pcs_reg; /* pcs reg. index in syscon */ 181 bool sata_refclk_enabled; 182 enum pipe3_mode mode; 183 struct pipe3_settings settings; 184}; 185 186static struct pipe3_dpll_map dpll_map_usb[] = { 187 {12000000, {1250, 5, 4, 20, 0} }, /* 12 MHz */ 188 {16800000, {3125, 20, 4, 20, 0} }, /* 16.8 MHz */ 189 {19200000, {1172, 8, 4, 20, 65537} }, /* 19.2 MHz */ 190 {20000000, {1000, 7, 4, 10, 0} }, /* 20 MHz */ 191 {26000000, {1250, 12, 4, 20, 0} }, /* 26 MHz */ 192 {38400000, {3125, 47, 4, 20, 92843} }, /* 38.4 MHz */ 193 { }, /* Terminator */ 194}; 195 196static struct pipe3_dpll_map dpll_map_sata[] = { 197 {12000000, {625, 4, 4, 6, 0} }, /* 12 MHz */ 198 {16800000, {625, 6, 4, 7, 0} }, /* 16.8 MHz */ 199 {19200000, {625, 7, 4, 6, 0} }, /* 19.2 MHz */ 200 {20000000, {750, 9, 4, 6, 0} }, /* 20 MHz */ 201 {26000000, {750, 12, 4, 6, 0} }, /* 26 MHz */ 202 {38400000, {625, 15, 4, 6, 0} }, /* 38.4 MHz */ 203 { }, /* Terminator */ 204}; 205 206struct pipe3_data { 207 enum pipe3_mode mode; 208 struct pipe3_dpll_map *dpll_map; 209 struct pipe3_settings settings; 210}; 211 212static struct pipe3_data data_usb = { 213 .mode = PIPE3_MODE_USBSS, 214 .dpll_map = dpll_map_usb, 215 .settings = { 216 /* DRA75x TRM Table 26-17 Preferred USB3_PHY_RX SCP Register Settings */ 217 .ana_interface = INTERFACE_MODE_USBSS, 218 .ana_losd = 0xa, 219 .dig_fastlock = 1, 220 .dig_lbw = 3, 221 .dig_stepcnt = 0, 222 .dig_stl = 0x3, 223 .dig_thr = 1, 224 .dig_thr_mode = 1, 225 .dig_2ndo_sdm_mode = 0, 226 .dig_hs_rate = 0, 227 .dig_ovrd_hs_rate = 1, 228 .dll_trim_sel = 0x2, 229 .dll_phint_rate = 0x3, 230 .eq_lev = 0, 231 .eq_ftc = 0, 232 .eq_ctl = 0x9, 233 .eq_ovrd_lev = 0, 234 .eq_ovrd_ftc = 0, 235 }, 236}; 237 238static struct pipe3_data data_sata = { 239 .mode = PIPE3_MODE_SATA, 240 .dpll_map = dpll_map_sata, 241 .settings = { 242 /* DRA75x TRM Table 26-9 Preferred SATA_PHY_RX SCP Register Settings */ 243 .ana_interface = INTERFACE_MODE_SATA_3P0, 244 .ana_losd = 0x5, 245 .dig_fastlock = 1, 246 .dig_lbw = 3, 247 .dig_stepcnt = 0, 248 .dig_stl = 0x3, 249 .dig_thr = 1, 250 .dig_thr_mode = 1, 251 .dig_2ndo_sdm_mode = 0, 252 .dig_hs_rate = 0, /* Not in TRM preferred settings */ 253 .dig_ovrd_hs_rate = 0, /* Not in TRM preferred settings */ 254 .dll_trim_sel = 0x1, 255 .dll_phint_rate = 0x2, /* for 1.5 GHz DPLL clock */ 256 .eq_lev = 0, 257 .eq_ftc = 0x1f, 258 .eq_ctl = 0, 259 .eq_ovrd_lev = 1, 260 .eq_ovrd_ftc = 1, 261 }, 262}; 263 264static struct pipe3_data data_pcie = { 265 .mode = PIPE3_MODE_PCIE, 266 .settings = { 267 /* DRA75x TRM Table 26-62 Preferred PCIe_PHY_RX SCP Register Settings */ 268 .ana_interface = INTERFACE_MODE_PCIE, 269 .ana_losd = 0xa, 270 .dig_fastlock = 1, 271 .dig_lbw = 3, 272 .dig_stepcnt = 0, 273 .dig_stl = 0x3, 274 .dig_thr = 1, 275 .dig_thr_mode = 1, 276 .dig_2ndo_sdm_mode = 0, 277 .dig_hs_rate = 0, 278 .dig_ovrd_hs_rate = 0, 279 .dll_trim_sel = 0x2, 280 .dll_phint_rate = 0x3, 281 .eq_lev = 0, 282 .eq_ftc = 0x1f, 283 .eq_ctl = 1, 284 .eq_ovrd_lev = 0, 285 .eq_ovrd_ftc = 0, 286 }, 287}; 288 289static inline u32 ti_pipe3_readl(void __iomem *addr, unsigned offset) 290{ 291 return __raw_readl(addr + offset); 292} 293 294static inline void ti_pipe3_writel(void __iomem *addr, unsigned offset, 295 u32 data) 296{ 297 __raw_writel(data, addr + offset); 298} 299 300static struct pipe3_dpll_params *ti_pipe3_get_dpll_params(struct ti_pipe3 *phy) 301{ 302 unsigned long rate; 303 struct pipe3_dpll_map *dpll_map = phy->dpll_map; 304 305 rate = clk_get_rate(phy->sys_clk); 306 307 for (; dpll_map->rate; dpll_map++) { 308 if (rate == dpll_map->rate) 309 return &dpll_map->params; 310 } 311 312 dev_err(phy->dev, "No DPLL configuration for %lu Hz SYS CLK\n", rate); 313 314 return NULL; 315} 316 317static int ti_pipe3_enable_clocks(struct ti_pipe3 *phy); 318static void ti_pipe3_disable_clocks(struct ti_pipe3 *phy); 319 320static int ti_pipe3_power_off(struct phy *x) 321{ 322 int ret; 323 struct ti_pipe3 *phy = phy_get_drvdata(x); 324 325 if (!phy->phy_power_syscon) { 326 omap_control_phy_power(phy->control_dev, 0); 327 return 0; 328 } 329 330 ret = regmap_update_bits(phy->phy_power_syscon, phy->power_reg, 331 PIPE3_PHY_PWRCTL_CLK_CMD_MASK, 0); 332 return ret; 333} 334 335static void ti_pipe3_calibrate(struct ti_pipe3 *phy); 336 337static int ti_pipe3_power_on(struct phy *x) 338{ 339 u32 val; 340 u32 mask; 341 unsigned long rate; 342 struct ti_pipe3 *phy = phy_get_drvdata(x); 343 bool rx_pending = false; 344 345 if (!phy->phy_power_syscon) { 346 omap_control_phy_power(phy->control_dev, 1); 347 return 0; 348 } 349 350 rate = clk_get_rate(phy->sys_clk); 351 if (!rate) { 352 dev_err(phy->dev, "Invalid clock rate\n"); 353 return -EINVAL; 354 } 355 rate = rate / 1000000; 356 mask = OMAP_CTRL_PIPE3_PHY_PWRCTL_CLK_FREQ_MASK; 357 val = rate << OMAP_CTRL_PIPE3_PHY_PWRCTL_CLK_FREQ_SHIFT; 358 regmap_update_bits(phy->phy_power_syscon, phy->power_reg, 359 mask, val); 360 /* 361 * For PCIe, TX and RX must be powered on simultaneously. 362 * For USB and SATA, TX must be powered on before RX 363 */ 364 mask = OMAP_CTRL_PIPE3_PHY_PWRCTL_CLK_CMD_MASK; 365 if (phy->mode == PIPE3_MODE_SATA || phy->mode == PIPE3_MODE_USBSS) { 366 val = PIPE3_PHY_TX_POWERON; 367 rx_pending = true; 368 } else { 369 val = PIPE3_PHY_TX_POWERON | PIPE3_PHY_RX_POWERON; 370 } 371 372 regmap_update_bits(phy->phy_power_syscon, phy->power_reg, 373 mask, val); 374 375 if (rx_pending) { 376 val = PIPE3_PHY_TX_POWERON | PIPE3_PHY_RX_POWERON; 377 regmap_update_bits(phy->phy_power_syscon, phy->power_reg, 378 mask, val); 379 } 380 381 if (phy->mode == PIPE3_MODE_PCIE) 382 ti_pipe3_calibrate(phy); 383 384 return 0; 385} 386 387static int ti_pipe3_dpll_wait_lock(struct ti_pipe3 *phy) 388{ 389 u32 val; 390 unsigned long timeout; 391 392 timeout = jiffies + msecs_to_jiffies(PLL_LOCK_TIME); 393 do { 394 cpu_relax(); 395 val = ti_pipe3_readl(phy->pll_ctrl_base, PLL_STATUS); 396 if (val & PLL_LOCK) 397 return 0; 398 } while (!time_after(jiffies, timeout)); 399 400 dev_err(phy->dev, "DPLL failed to lock\n"); 401 return -EBUSY; 402} 403 404static int ti_pipe3_dpll_program(struct ti_pipe3 *phy) 405{ 406 u32 val; 407 struct pipe3_dpll_params *dpll_params; 408 409 dpll_params = ti_pipe3_get_dpll_params(phy); 410 if (!dpll_params) 411 return -EINVAL; 412 413 val = ti_pipe3_readl(phy->pll_ctrl_base, PLL_CONFIGURATION1); 414 val &= ~PLL_REGN_MASK; 415 val |= dpll_params->n << PLL_REGN_SHIFT; 416 ti_pipe3_writel(phy->pll_ctrl_base, PLL_CONFIGURATION1, val); 417 418 val = ti_pipe3_readl(phy->pll_ctrl_base, PLL_CONFIGURATION2); 419 val &= ~PLL_SELFREQDCO_MASK; 420 val |= dpll_params->freq << PLL_SELFREQDCO_SHIFT; 421 ti_pipe3_writel(phy->pll_ctrl_base, PLL_CONFIGURATION2, val); 422 423 val = ti_pipe3_readl(phy->pll_ctrl_base, PLL_CONFIGURATION1); 424 val &= ~PLL_REGM_MASK; 425 val |= dpll_params->m << PLL_REGM_SHIFT; 426 ti_pipe3_writel(phy->pll_ctrl_base, PLL_CONFIGURATION1, val); 427 428 val = ti_pipe3_readl(phy->pll_ctrl_base, PLL_CONFIGURATION4); 429 val &= ~PLL_REGM_F_MASK; 430 val |= dpll_params->mf << PLL_REGM_F_SHIFT; 431 ti_pipe3_writel(phy->pll_ctrl_base, PLL_CONFIGURATION4, val); 432 433 val = ti_pipe3_readl(phy->pll_ctrl_base, PLL_CONFIGURATION3); 434 val &= ~PLL_SD_MASK; 435 val |= dpll_params->sd << PLL_SD_SHIFT; 436 ti_pipe3_writel(phy->pll_ctrl_base, PLL_CONFIGURATION3, val); 437 438 ti_pipe3_writel(phy->pll_ctrl_base, PLL_GO, SET_PLL_GO); 439 440 return ti_pipe3_dpll_wait_lock(phy); 441} 442 443static void ti_pipe3_calibrate(struct ti_pipe3 *phy) 444{ 445 u32 val; 446 struct pipe3_settings *s = &phy->settings; 447 448 val = ti_pipe3_readl(phy->phy_rx, PIPE3_PHY_RX_ANA_PROGRAMMABILITY); 449 val &= ~(INTERFACE_MASK | LOSD_MASK | MEM_PLLDIV); 450 val |= (s->ana_interface << INTERFACE_SHIFT | s->ana_losd << LOSD_SHIFT); 451 ti_pipe3_writel(phy->phy_rx, PIPE3_PHY_RX_ANA_PROGRAMMABILITY, val); 452 453 val = ti_pipe3_readl(phy->phy_rx, PIPE3_PHY_RX_DIGITAL_MODES); 454 val &= ~(MEM_HS_RATE_MASK | MEM_OVRD_HS_RATE | MEM_CDR_FASTLOCK | 455 MEM_CDR_LBW_MASK | MEM_CDR_STEPCNT_MASK | MEM_CDR_STL_MASK | 456 MEM_CDR_THR_MASK | MEM_CDR_THR_MODE | MEM_CDR_2NDO_SDM_MODE); 457 val |= s->dig_hs_rate << MEM_HS_RATE_SHIFT | 458 s->dig_ovrd_hs_rate << MEM_OVRD_HS_RATE_SHIFT | 459 s->dig_fastlock << MEM_CDR_FASTLOCK_SHIFT | 460 s->dig_lbw << MEM_CDR_LBW_SHIFT | 461 s->dig_stepcnt << MEM_CDR_STEPCNT_SHIFT | 462 s->dig_stl << MEM_CDR_STL_SHIFT | 463 s->dig_thr << MEM_CDR_THR_SHIFT | 464 s->dig_thr_mode << MEM_CDR_THR_MODE_SHIFT | 465 s->dig_2ndo_sdm_mode << MEM_CDR_2NDO_SDM_MODE_SHIFT; 466 ti_pipe3_writel(phy->phy_rx, PIPE3_PHY_RX_DIGITAL_MODES, val); 467 468 val = ti_pipe3_readl(phy->phy_rx, PIPE3_PHY_RX_TRIM); 469 val &= ~MEM_DLL_TRIM_SEL_MASK; 470 val |= s->dll_trim_sel << MEM_DLL_TRIM_SHIFT; 471 ti_pipe3_writel(phy->phy_rx, PIPE3_PHY_RX_TRIM, val); 472 473 val = ti_pipe3_readl(phy->phy_rx, PIPE3_PHY_RX_DLL); 474 val &= ~MEM_DLL_PHINT_RATE_MASK; 475 val |= s->dll_phint_rate << MEM_DLL_PHINT_RATE_SHIFT; 476 ti_pipe3_writel(phy->phy_rx, PIPE3_PHY_RX_DLL, val); 477 478 val = ti_pipe3_readl(phy->phy_rx, PIPE3_PHY_RX_EQUALIZER); 479 val &= ~(MEM_EQLEV_MASK | MEM_EQFTC_MASK | MEM_EQCTL_MASK | 480 MEM_OVRD_EQLEV | MEM_OVRD_EQFTC); 481 val |= s->eq_lev << MEM_EQLEV_SHIFT | 482 s->eq_ftc << MEM_EQFTC_SHIFT | 483 s->eq_ctl << MEM_EQCTL_SHIFT | 484 s->eq_ovrd_lev << MEM_OVRD_EQLEV_SHIFT | 485 s->eq_ovrd_ftc << MEM_OVRD_EQFTC_SHIFT; 486 ti_pipe3_writel(phy->phy_rx, PIPE3_PHY_RX_EQUALIZER, val); 487 488 if (phy->mode == PIPE3_MODE_SATA) { 489 val = ti_pipe3_readl(phy->phy_rx, 490 SATA_PHY_RX_IO_AND_A2D_OVERRIDES); 491 val &= ~MEM_CDR_LOS_SOURCE_MASK; 492 ti_pipe3_writel(phy->phy_rx, SATA_PHY_RX_IO_AND_A2D_OVERRIDES, 493 val); 494 } 495} 496 497static int ti_pipe3_init(struct phy *x) 498{ 499 struct ti_pipe3 *phy = phy_get_drvdata(x); 500 u32 val; 501 int ret = 0; 502 503 ti_pipe3_enable_clocks(phy); 504 /* 505 * Set pcie_pcs register to 0x96 for proper functioning of phy 506 * as recommended in AM572x TRM SPRUHZ6, section 18.5.2.2, table 507 * 18-1804. 508 */ 509 if (phy->mode == PIPE3_MODE_PCIE) { 510 if (!phy->pcs_syscon) { 511 omap_control_pcie_pcs(phy->control_dev, 0x96); 512 return 0; 513 } 514 515 val = 0x96 << OMAP_CTRL_PCIE_PCS_DELAY_COUNT_SHIFT; 516 ret = regmap_update_bits(phy->pcs_syscon, phy->pcie_pcs_reg, 517 PCIE_PCS_MASK, val); 518 return ret; 519 } 520 521 /* Bring it out of IDLE if it is IDLE */ 522 val = ti_pipe3_readl(phy->pll_ctrl_base, PLL_CONFIGURATION2); 523 if (val & PLL_IDLE) { 524 val &= ~PLL_IDLE; 525 ti_pipe3_writel(phy->pll_ctrl_base, PLL_CONFIGURATION2, val); 526 ret = ti_pipe3_dpll_wait_lock(phy); 527 } 528 529 /* SATA has issues if re-programmed when locked */ 530 val = ti_pipe3_readl(phy->pll_ctrl_base, PLL_STATUS); 531 if ((val & PLL_LOCK) && phy->mode == PIPE3_MODE_SATA) 532 return ret; 533 534 /* Program the DPLL */ 535 ret = ti_pipe3_dpll_program(phy); 536 if (ret) { 537 ti_pipe3_disable_clocks(phy); 538 return -EINVAL; 539 } 540 541 ti_pipe3_calibrate(phy); 542 543 return ret; 544} 545 546static int ti_pipe3_exit(struct phy *x) 547{ 548 struct ti_pipe3 *phy = phy_get_drvdata(x); 549 u32 val; 550 unsigned long timeout; 551 552 /* If dpll_reset_syscon is not present we wont power down SATA DPLL 553 * due to Errata i783 554 */ 555 if (phy->mode == PIPE3_MODE_SATA && !phy->dpll_reset_syscon) 556 return 0; 557 558 /* PCIe doesn't have internal DPLL */ 559 if (phy->mode != PIPE3_MODE_PCIE) { 560 /* Put DPLL in IDLE mode */ 561 val = ti_pipe3_readl(phy->pll_ctrl_base, PLL_CONFIGURATION2); 562 val |= PLL_IDLE; 563 ti_pipe3_writel(phy->pll_ctrl_base, PLL_CONFIGURATION2, val); 564 565 /* wait for LDO and Oscillator to power down */ 566 timeout = jiffies + msecs_to_jiffies(PLL_IDLE_TIME); 567 do { 568 cpu_relax(); 569 val = ti_pipe3_readl(phy->pll_ctrl_base, PLL_STATUS); 570 if ((val & PLL_TICOPWDN) && (val & PLL_LDOPWDN)) 571 break; 572 } while (!time_after(jiffies, timeout)); 573 574 if (!(val & PLL_TICOPWDN) || !(val & PLL_LDOPWDN)) { 575 dev_err(phy->dev, "Failed to power down: PLL_STATUS 0x%x\n", 576 val); 577 return -EBUSY; 578 } 579 } 580 581 /* i783: SATA needs control bit toggle after PLL unlock */ 582 if (phy->mode == PIPE3_MODE_SATA) { 583 regmap_update_bits(phy->dpll_reset_syscon, phy->dpll_reset_reg, 584 SATA_PLL_SOFT_RESET, SATA_PLL_SOFT_RESET); 585 regmap_update_bits(phy->dpll_reset_syscon, phy->dpll_reset_reg, 586 SATA_PLL_SOFT_RESET, 0); 587 } 588 589 ti_pipe3_disable_clocks(phy); 590 591 return 0; 592} 593static const struct phy_ops ops = { 594 .init = ti_pipe3_init, 595 .exit = ti_pipe3_exit, 596 .power_on = ti_pipe3_power_on, 597 .power_off = ti_pipe3_power_off, 598 .owner = THIS_MODULE, 599}; 600 601static const struct of_device_id ti_pipe3_id_table[]; 602 603static int ti_pipe3_get_clk(struct ti_pipe3 *phy) 604{ 605 struct clk *clk; 606 struct device *dev = phy->dev; 607 608 phy->refclk = devm_clk_get(dev, "refclk"); 609 if (IS_ERR(phy->refclk)) { 610 dev_err(dev, "unable to get refclk\n"); 611 /* older DTBs have missing refclk in SATA PHY 612 * so don't bail out in case of SATA PHY. 613 */ 614 if (phy->mode != PIPE3_MODE_SATA) 615 return PTR_ERR(phy->refclk); 616 } 617 618 if (phy->mode != PIPE3_MODE_SATA) { 619 phy->wkupclk = devm_clk_get(dev, "wkupclk"); 620 if (IS_ERR(phy->wkupclk)) { 621 dev_err(dev, "unable to get wkupclk\n"); 622 return PTR_ERR(phy->wkupclk); 623 } 624 } else { 625 phy->wkupclk = ERR_PTR(-ENODEV); 626 } 627 628 if (phy->mode != PIPE3_MODE_PCIE || phy->phy_power_syscon) { 629 phy->sys_clk = devm_clk_get(dev, "sysclk"); 630 if (IS_ERR(phy->sys_clk)) { 631 dev_err(dev, "unable to get sysclk\n"); 632 return -EINVAL; 633 } 634 } 635 636 if (phy->mode == PIPE3_MODE_PCIE) { 637 clk = devm_clk_get(dev, "dpll_ref"); 638 if (IS_ERR(clk)) { 639 dev_err(dev, "unable to get dpll ref clk\n"); 640 return PTR_ERR(clk); 641 } 642 clk_set_rate(clk, 1500000000); 643 644 clk = devm_clk_get(dev, "dpll_ref_m2"); 645 if (IS_ERR(clk)) { 646 dev_err(dev, "unable to get dpll ref m2 clk\n"); 647 return PTR_ERR(clk); 648 } 649 clk_set_rate(clk, 100000000); 650 651 clk = devm_clk_get(dev, "phy-div"); 652 if (IS_ERR(clk)) { 653 dev_err(dev, "unable to get phy-div clk\n"); 654 return PTR_ERR(clk); 655 } 656 clk_set_rate(clk, 100000000); 657 658 phy->div_clk = devm_clk_get(dev, "div-clk"); 659 if (IS_ERR(phy->div_clk)) { 660 dev_err(dev, "unable to get div-clk\n"); 661 return PTR_ERR(phy->div_clk); 662 } 663 } else { 664 phy->div_clk = ERR_PTR(-ENODEV); 665 } 666 667 return 0; 668} 669 670static void ti_pipe3_put_device(void *_dev) 671{ 672 struct device *dev = _dev; 673 674 put_device(dev); 675} 676 677static int ti_pipe3_get_sysctrl(struct ti_pipe3 *phy) 678{ 679 struct device *dev = phy->dev; 680 struct device_node *node = dev->of_node; 681 struct device_node *control_node; 682 struct platform_device *control_pdev; 683 int ret; 684 685 phy->phy_power_syscon = syscon_regmap_lookup_by_phandle(node, 686 "syscon-phy-power"); 687 if (IS_ERR(phy->phy_power_syscon)) { 688 dev_dbg(dev, 689 "can't get syscon-phy-power, using control device\n"); 690 phy->phy_power_syscon = NULL; 691 } else { 692 if (of_property_read_u32_index(node, 693 "syscon-phy-power", 1, 694 &phy->power_reg)) { 695 dev_err(dev, "couldn't get power reg. offset\n"); 696 return -EINVAL; 697 } 698 } 699 700 if (!phy->phy_power_syscon) { 701 control_node = of_parse_phandle(node, "ctrl-module", 0); 702 if (!control_node) { 703 dev_err(dev, "Failed to get control device phandle\n"); 704 return -EINVAL; 705 } 706 707 control_pdev = of_find_device_by_node(control_node); 708 of_node_put(control_node); 709 if (!control_pdev) { 710 dev_err(dev, "Failed to get control device\n"); 711 return -EINVAL; 712 } 713 714 phy->control_dev = &control_pdev->dev; 715 716 ret = devm_add_action_or_reset(dev, ti_pipe3_put_device, 717 phy->control_dev); 718 if (ret) 719 return ret; 720 } 721 722 if (phy->mode == PIPE3_MODE_PCIE) { 723 phy->pcs_syscon = syscon_regmap_lookup_by_phandle(node, 724 "syscon-pcs"); 725 if (IS_ERR(phy->pcs_syscon)) { 726 dev_dbg(dev, 727 "can't get syscon-pcs, using omap control\n"); 728 phy->pcs_syscon = NULL; 729 } else { 730 if (of_property_read_u32_index(node, 731 "syscon-pcs", 1, 732 &phy->pcie_pcs_reg)) { 733 dev_err(dev, 734 "couldn't get pcie pcs reg. offset\n"); 735 return -EINVAL; 736 } 737 } 738 } 739 740 if (phy->mode == PIPE3_MODE_SATA) { 741 phy->dpll_reset_syscon = syscon_regmap_lookup_by_phandle(node, 742 "syscon-pllreset"); 743 if (IS_ERR(phy->dpll_reset_syscon)) { 744 dev_info(dev, 745 "can't get syscon-pllreset, sata dpll won't idle\n"); 746 phy->dpll_reset_syscon = NULL; 747 } else { 748 if (of_property_read_u32_index(node, 749 "syscon-pllreset", 1, 750 &phy->dpll_reset_reg)) { 751 dev_err(dev, 752 "couldn't get pllreset reg. offset\n"); 753 return -EINVAL; 754 } 755 } 756 } 757 758 return 0; 759} 760 761static int ti_pipe3_get_tx_rx_base(struct ti_pipe3 *phy) 762{ 763 struct device *dev = phy->dev; 764 struct platform_device *pdev = to_platform_device(dev); 765 766 phy->phy_rx = devm_platform_ioremap_resource_byname(pdev, "phy_rx"); 767 if (IS_ERR(phy->phy_rx)) 768 return PTR_ERR(phy->phy_rx); 769 770 phy->phy_tx = devm_platform_ioremap_resource_byname(pdev, "phy_tx"); 771 772 return PTR_ERR_OR_ZERO(phy->phy_tx); 773} 774 775static int ti_pipe3_get_pll_base(struct ti_pipe3 *phy) 776{ 777 struct device *dev = phy->dev; 778 struct platform_device *pdev = to_platform_device(dev); 779 780 if (phy->mode == PIPE3_MODE_PCIE) 781 return 0; 782 783 phy->pll_ctrl_base = 784 devm_platform_ioremap_resource_byname(pdev, "pll_ctrl"); 785 return PTR_ERR_OR_ZERO(phy->pll_ctrl_base); 786} 787 788static int ti_pipe3_probe(struct platform_device *pdev) 789{ 790 struct ti_pipe3 *phy; 791 struct phy *generic_phy; 792 struct phy_provider *phy_provider; 793 struct device *dev = &pdev->dev; 794 int ret; 795 const struct pipe3_data *data; 796 797 phy = devm_kzalloc(dev, sizeof(*phy), GFP_KERNEL); 798 if (!phy) 799 return -ENOMEM; 800 801 data = device_get_match_data(dev); 802 if (!data) 803 return -EINVAL; 804 805 phy->dev = dev; 806 phy->mode = data->mode; 807 phy->dpll_map = data->dpll_map; 808 phy->settings = data->settings; 809 810 ret = ti_pipe3_get_pll_base(phy); 811 if (ret) 812 return ret; 813 814 ret = ti_pipe3_get_tx_rx_base(phy); 815 if (ret) 816 return ret; 817 818 ret = ti_pipe3_get_sysctrl(phy); 819 if (ret) 820 return ret; 821 822 ret = ti_pipe3_get_clk(phy); 823 if (ret) 824 return ret; 825 826 platform_set_drvdata(pdev, phy); 827 pm_runtime_enable(dev); 828 829 /* 830 * Prevent auto-disable of refclk for SATA PHY due to Errata i783 831 */ 832 if (phy->mode == PIPE3_MODE_SATA) { 833 if (!IS_ERR(phy->refclk)) { 834 clk_prepare_enable(phy->refclk); 835 phy->sata_refclk_enabled = true; 836 } 837 } 838 839 generic_phy = devm_phy_create(dev, NULL, &ops); 840 if (IS_ERR(generic_phy)) 841 return PTR_ERR(generic_phy); 842 843 phy_set_drvdata(generic_phy, phy); 844 845 ti_pipe3_power_off(generic_phy); 846 847 phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate); 848 return PTR_ERR_OR_ZERO(phy_provider); 849} 850 851static void ti_pipe3_remove(struct platform_device *pdev) 852{ 853 struct ti_pipe3 *phy = platform_get_drvdata(pdev); 854 855 if (phy->mode == PIPE3_MODE_SATA) { 856 clk_disable_unprepare(phy->refclk); 857 phy->sata_refclk_enabled = false; 858 } 859 pm_runtime_disable(&pdev->dev); 860} 861 862static int ti_pipe3_enable_clocks(struct ti_pipe3 *phy) 863{ 864 int ret = 0; 865 866 if (!IS_ERR(phy->refclk)) { 867 ret = clk_prepare_enable(phy->refclk); 868 if (ret) { 869 dev_err(phy->dev, "Failed to enable refclk %d\n", ret); 870 return ret; 871 } 872 } 873 874 if (!IS_ERR(phy->wkupclk)) { 875 ret = clk_prepare_enable(phy->wkupclk); 876 if (ret) { 877 dev_err(phy->dev, "Failed to enable wkupclk %d\n", ret); 878 goto disable_refclk; 879 } 880 } 881 882 if (!IS_ERR(phy->div_clk)) { 883 ret = clk_prepare_enable(phy->div_clk); 884 if (ret) { 885 dev_err(phy->dev, "Failed to enable div_clk %d\n", ret); 886 goto disable_wkupclk; 887 } 888 } 889 890 return 0; 891 892disable_wkupclk: 893 if (!IS_ERR(phy->wkupclk)) 894 clk_disable_unprepare(phy->wkupclk); 895 896disable_refclk: 897 if (!IS_ERR(phy->refclk)) 898 clk_disable_unprepare(phy->refclk); 899 900 return ret; 901} 902 903static void ti_pipe3_disable_clocks(struct ti_pipe3 *phy) 904{ 905 if (!IS_ERR(phy->wkupclk)) 906 clk_disable_unprepare(phy->wkupclk); 907 if (!IS_ERR(phy->refclk)) 908 clk_disable_unprepare(phy->refclk); 909 if (!IS_ERR(phy->div_clk)) 910 clk_disable_unprepare(phy->div_clk); 911} 912 913static const struct of_device_id ti_pipe3_id_table[] = { 914 { 915 .compatible = "ti,phy-usb3", 916 .data = &data_usb, 917 }, 918 { 919 .compatible = "ti,omap-usb3", 920 .data = &data_usb, 921 }, 922 { 923 .compatible = "ti,phy-pipe3-sata", 924 .data = &data_sata, 925 }, 926 { 927 .compatible = "ti,phy-pipe3-pcie", 928 .data = &data_pcie, 929 }, 930 {} 931}; 932MODULE_DEVICE_TABLE(of, ti_pipe3_id_table); 933 934static struct platform_driver ti_pipe3_driver = { 935 .probe = ti_pipe3_probe, 936 .remove = ti_pipe3_remove, 937 .driver = { 938 .name = "ti-pipe3", 939 .of_match_table = ti_pipe3_id_table, 940 }, 941}; 942 943module_platform_driver(ti_pipe3_driver); 944 945MODULE_AUTHOR("Texas Instruments Inc."); 946MODULE_DESCRIPTION("TI PIPE3 phy driver"); 947MODULE_LICENSE("GPL v2");
~/
Read-only file preview.