1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Copyright 2012-2014 Freescale Semiconductor, Inc. 4 * Copyright (C) 2012 Marek Vasut <marex@denx.de> 5 * on behalf of DENX Software Engineering GmbH 6 */ 7 8 #include <linux/module.h> 9 #include <linux/kernel.h> 10 #include <linux/platform_device.h> 11 #include <linux/clk.h> 12 #include <linux/usb/otg.h> 13 #include <linux/stmp_device.h> 14 #include <linux/delay.h> 15 #include <linux/err.h> 16 #include <linux/io.h> 17 #include <linux/of.h> 18 #include <linux/regmap.h> 19 #include <linux/mfd/syscon.h> 20 #include <linux/iopoll.h> 21 22 #define DRIVER_NAME "mxs_phy" 23 24 /* Register Macro */ 25 #define HW_USBPHY_PWD 0x00 26 #define HW_USBPHY_TX 0x10 27 #define HW_USBPHY_CTRL 0x30 28 #define HW_USBPHY_CTRL_SET 0x34 29 #define HW_USBPHY_CTRL_CLR 0x38 30 31 #define HW_USBPHY_DEBUG_SET 0x54 32 #define HW_USBPHY_DEBUG_CLR 0x58 33 34 #define HW_USBPHY_IP 0x90 35 #define HW_USBPHY_IP_SET 0x94 36 #define HW_USBPHY_IP_CLR 0x98 37 38 #define GM_USBPHY_TX_TXCAL45DP(x) (((x) & 0xf) << 16) 39 #define GM_USBPHY_TX_TXCAL45DN(x) (((x) & 0xf) << 8) 40 #define GM_USBPHY_TX_D_CAL(x) (((x) & 0xf) << 0) 41 42 /* imx7ulp */ 43 #define HW_USBPHY_PLL_SIC 0xa0 44 #define HW_USBPHY_PLL_SIC_SET 0xa4 45 #define HW_USBPHY_PLL_SIC_CLR 0xa8 46 47 #define BM_USBPHY_CTRL_SFTRST BIT(31) 48 #define BM_USBPHY_CTRL_CLKGATE BIT(30) 49 #define BM_USBPHY_CTRL_OTG_ID_VALUE BIT(27) 50 #define BM_USBPHY_CTRL_ENAUTOSET_USBCLKS BIT(26) 51 #define BM_USBPHY_CTRL_ENAUTOCLR_USBCLKGATE BIT(25) 52 #define BM_USBPHY_CTRL_ENVBUSCHG_WKUP BIT(23) 53 #define BM_USBPHY_CTRL_ENIDCHG_WKUP BIT(22) 54 #define BM_USBPHY_CTRL_ENDPDMCHG_WKUP BIT(21) 55 #define BM_USBPHY_CTRL_ENAUTOCLR_PHY_PWD BIT(20) 56 #define BM_USBPHY_CTRL_ENAUTOCLR_CLKGATE BIT(19) 57 #define BM_USBPHY_CTRL_ENAUTO_PWRON_PLL BIT(18) 58 #define BM_USBPHY_CTRL_ENUTMILEVEL3 BIT(15) 59 #define BM_USBPHY_CTRL_ENUTMILEVEL2 BIT(14) 60 #define BM_USBPHY_CTRL_ENHOSTDISCONDETECT BIT(1) 61 62 #define BM_USBPHY_IP_FIX (BIT(17) | BIT(18)) 63 64 #define BM_USBPHY_DEBUG_CLKGATE BIT(30) 65 /* imx7ulp */ 66 #define BM_USBPHY_PLL_LOCK BIT(31) 67 #define BM_USBPHY_PLL_REG_ENABLE BIT(21) 68 #define BM_USBPHY_PLL_BYPASS BIT(16) 69 #define BM_USBPHY_PLL_POWER BIT(12) 70 #define BM_USBPHY_PLL_EN_USB_CLKS BIT(6) 71 72 /* Anatop Registers */ 73 #define ANADIG_ANA_MISC0 0x150 74 #define ANADIG_ANA_MISC0_SET 0x154 75 #define ANADIG_ANA_MISC0_CLR 0x158 76 77 #define ANADIG_USB1_CHRG_DETECT_SET 0x1b4 78 #define ANADIG_USB1_CHRG_DETECT_CLR 0x1b8 79 #define ANADIG_USB2_CHRG_DETECT_SET 0x214 80 #define ANADIG_USB1_CHRG_DETECT_EN_B BIT(20) 81 #define ANADIG_USB1_CHRG_DETECT_CHK_CHRG_B BIT(19) 82 #define ANADIG_USB1_CHRG_DETECT_CHK_CONTACT BIT(18) 83 84 #define ANADIG_USB1_VBUS_DET_STAT 0x1c0 85 #define ANADIG_USB1_VBUS_DET_STAT_VBUS_VALID BIT(3) 86 87 #define ANADIG_USB1_CHRG_DET_STAT 0x1d0 88 #define ANADIG_USB1_CHRG_DET_STAT_DM_STATE BIT(2) 89 #define ANADIG_USB1_CHRG_DET_STAT_CHRG_DETECTED BIT(1) 90 #define ANADIG_USB1_CHRG_DET_STAT_PLUG_CONTACT BIT(0) 91 92 #define ANADIG_USB2_VBUS_DET_STAT 0x220 93 94 #define ANADIG_USB1_LOOPBACK_SET 0x1e4 95 #define ANADIG_USB1_LOOPBACK_CLR 0x1e8 96 #define ANADIG_USB1_LOOPBACK_UTMI_TESTSTART BIT(0) 97 98 #define ANADIG_USB2_LOOPBACK_SET 0x244 99 #define ANADIG_USB2_LOOPBACK_CLR 0x248 100 101 #define ANADIG_USB1_MISC 0x1f0 102 #define ANADIG_USB2_MISC 0x250 103 104 #define BM_ANADIG_ANA_MISC0_STOP_MODE_CONFIG BIT(12) 105 #define BM_ANADIG_ANA_MISC0_STOP_MODE_CONFIG_SL BIT(11) 106 107 #define BM_ANADIG_USB1_VBUS_DET_STAT_VBUS_VALID BIT(3) 108 #define BM_ANADIG_USB2_VBUS_DET_STAT_VBUS_VALID BIT(3) 109 110 #define BM_ANADIG_USB1_LOOPBACK_UTMI_DIG_TST1 BIT(2) 111 #define BM_ANADIG_USB1_LOOPBACK_TSTI_TX_EN BIT(5) 112 #define BM_ANADIG_USB2_LOOPBACK_UTMI_DIG_TST1 BIT(2) 113 #define BM_ANADIG_USB2_LOOPBACK_TSTI_TX_EN BIT(5) 114 115 #define BM_ANADIG_USB1_MISC_RX_VPIN_FS BIT(29) 116 #define BM_ANADIG_USB1_MISC_RX_VMIN_FS BIT(28) 117 #define BM_ANADIG_USB2_MISC_RX_VPIN_FS BIT(29) 118 #define BM_ANADIG_USB2_MISC_RX_VMIN_FS BIT(28) 119 120 #define to_mxs_phy(p) container_of((p), struct mxs_phy, phy) 121 122 /* Do disconnection between PHY and controller without vbus */ 123 #define MXS_PHY_DISCONNECT_LINE_WITHOUT_VBUS BIT(0) 124 125 /* 126 * The PHY will be in messy if there is a wakeup after putting 127 * bus to suspend (set portsc.suspendM) but before setting PHY to low 128 * power mode (set portsc.phcd). 129 */ 130 #define MXS_PHY_ABNORMAL_IN_SUSPEND BIT(1) 131 132 /* 133 * The SOF sends too fast after resuming, it will cause disconnection 134 * between host and high speed device. 135 */ 136 #define MXS_PHY_SENDING_SOF_TOO_FAST BIT(2) 137 138 /* 139 * IC has bug fixes logic, they include 140 * MXS_PHY_ABNORMAL_IN_SUSPEND and MXS_PHY_SENDING_SOF_TOO_FAST 141 * which are described at above flags, the RTL will handle it 142 * according to different versions. 143 */ 144 #define MXS_PHY_NEED_IP_FIX BIT(3) 145 146 /* Minimum and maximum values for device tree entries */ 147 #define MXS_PHY_TX_CAL45_MIN 35 148 #define MXS_PHY_TX_CAL45_MAX 54 149 #define MXS_PHY_TX_D_CAL_MIN 79 150 #define MXS_PHY_TX_D_CAL_MAX 119 151 152 struct mxs_phy_data { 153 unsigned int flags; 154 }; 155 156 static const struct mxs_phy_data imx23_phy_data = { 157 .flags = MXS_PHY_ABNORMAL_IN_SUSPEND | MXS_PHY_SENDING_SOF_TOO_FAST, 158 }; 159 160 static const struct mxs_phy_data imx6q_phy_data = { 161 .flags = MXS_PHY_SENDING_SOF_TOO_FAST | 162 MXS_PHY_DISCONNECT_LINE_WITHOUT_VBUS | 163 MXS_PHY_NEED_IP_FIX, 164 }; 165 166 static const struct mxs_phy_data imx6sl_phy_data = { 167 .flags = MXS_PHY_DISCONNECT_LINE_WITHOUT_VBUS | 168 MXS_PHY_NEED_IP_FIX, 169 }; 170 171 static const struct mxs_phy_data vf610_phy_data = { 172 .flags = MXS_PHY_DISCONNECT_LINE_WITHOUT_VBUS | 173 MXS_PHY_NEED_IP_FIX, 174 }; 175 176 static const struct mxs_phy_data imx6sx_phy_data = { 177 .flags = MXS_PHY_DISCONNECT_LINE_WITHOUT_VBUS, 178 }; 179 180 static const struct mxs_phy_data imx6ul_phy_data = { 181 .flags = MXS_PHY_DISCONNECT_LINE_WITHOUT_VBUS, 182 }; 183 184 static const struct mxs_phy_data imx7ulp_phy_data = { 185 }; 186 187 static const struct of_device_id mxs_phy_dt_ids[] = { 188 { .compatible = "fsl,imx6sx-usbphy", .data = &imx6sx_phy_data, }, 189 { .compatible = "fsl,imx6sl-usbphy", .data = &imx6sl_phy_data, }, 190 { .compatible = "fsl,imx6q-usbphy", .data = &imx6q_phy_data, }, 191 { .compatible = "fsl,imx23-usbphy", .data = &imx23_phy_data, }, 192 { .compatible = "fsl,vf610-usbphy", .data = &vf610_phy_data, }, 193 { .compatible = "fsl,imx6ul-usbphy", .data = &imx6ul_phy_data, }, 194 { .compatible = "fsl,imx7ulp-usbphy", .data = &imx7ulp_phy_data, }, 195 { /* sentinel */ } 196 }; 197 MODULE_DEVICE_TABLE(of, mxs_phy_dt_ids); 198 199 struct mxs_phy { 200 struct usb_phy phy; 201 struct clk *clk; 202 const struct mxs_phy_data *data; 203 struct regmap *regmap_anatop; 204 int port_id; 205 u32 tx_reg_set; 206 u32 tx_reg_mask; 207 }; 208 209 static inline bool is_imx6q_phy(struct mxs_phy *mxs_phy) 210 { 211 return mxs_phy->data == &imx6q_phy_data; 212 } 213 214 static inline bool is_imx6sl_phy(struct mxs_phy *mxs_phy) 215 { 216 return mxs_phy->data == &imx6sl_phy_data; 217 } 218 219 static inline bool is_imx7ulp_phy(struct mxs_phy *mxs_phy) 220 { 221 return mxs_phy->data == &imx7ulp_phy_data; 222 } 223 224 /* 225 * PHY needs some 32K cycles to switch from 32K clock to 226 * bus (such as AHB/AXI, etc) clock. 227 */ 228 static void mxs_phy_clock_switch_delay(void) 229 { 230 usleep_range(300, 400); 231 } 232 233 static void mxs_phy_tx_init(struct mxs_phy *mxs_phy) 234 { 235 void __iomem *base = mxs_phy->phy.io_priv; 236 u32 phytx; 237 238 /* Update TX register if there is anything to write */ 239 if (mxs_phy->tx_reg_mask) { 240 phytx = readl(base + HW_USBPHY_TX); 241 phytx &= ~mxs_phy->tx_reg_mask; 242 phytx |= mxs_phy->tx_reg_set; 243 writel(phytx, base + HW_USBPHY_TX); 244 } 245 } 246 247 static int mxs_phy_pll_enable(void __iomem *base, bool enable) 248 { 249 int ret = 0; 250 251 if (enable) { 252 u32 value; 253 254 writel(BM_USBPHY_PLL_REG_ENABLE, base + HW_USBPHY_PLL_SIC_SET); 255 writel(BM_USBPHY_PLL_BYPASS, base + HW_USBPHY_PLL_SIC_CLR); 256 writel(BM_USBPHY_PLL_POWER, base + HW_USBPHY_PLL_SIC_SET); 257 ret = readl_poll_timeout(base + HW_USBPHY_PLL_SIC, 258 value, (value & BM_USBPHY_PLL_LOCK) != 0, 259 100, 10000); 260 if (ret) 261 return ret; 262 263 writel(BM_USBPHY_PLL_EN_USB_CLKS, base + 264 HW_USBPHY_PLL_SIC_SET); 265 } else { 266 writel(BM_USBPHY_PLL_EN_USB_CLKS, base + 267 HW_USBPHY_PLL_SIC_CLR); 268 writel(BM_USBPHY_PLL_POWER, base + HW_USBPHY_PLL_SIC_CLR); 269 writel(BM_USBPHY_PLL_BYPASS, base + HW_USBPHY_PLL_SIC_SET); 270 writel(BM_USBPHY_PLL_REG_ENABLE, base + HW_USBPHY_PLL_SIC_CLR); 271 } 272 273 return ret; 274 } 275 276 static int mxs_phy_hw_init(struct mxs_phy *mxs_phy) 277 { 278 int ret; 279 void __iomem *base = mxs_phy->phy.io_priv; 280 281 if (is_imx7ulp_phy(mxs_phy)) { 282 ret = mxs_phy_pll_enable(base, true); 283 if (ret) 284 return ret; 285 } 286 287 ret = stmp_reset_block(base + HW_USBPHY_CTRL); 288 if (ret) 289 goto disable_pll; 290 291 /* Power up the PHY */ 292 writel(0, base + HW_USBPHY_PWD); 293 294 /* 295 * USB PHY Ctrl Setting 296 * - Auto clock/power on 297 * - Enable full/low speed support 298 */ 299 writel(BM_USBPHY_CTRL_ENAUTOSET_USBCLKS | 300 BM_USBPHY_CTRL_ENAUTOCLR_USBCLKGATE | 301 BM_USBPHY_CTRL_ENAUTOCLR_PHY_PWD | 302 BM_USBPHY_CTRL_ENAUTOCLR_CLKGATE | 303 BM_USBPHY_CTRL_ENAUTO_PWRON_PLL | 304 BM_USBPHY_CTRL_ENUTMILEVEL2 | 305 BM_USBPHY_CTRL_ENUTMILEVEL3, 306 base + HW_USBPHY_CTRL_SET); 307 308 if (mxs_phy->data->flags & MXS_PHY_NEED_IP_FIX) 309 writel(BM_USBPHY_IP_FIX, base + HW_USBPHY_IP_SET); 310 311 if (mxs_phy->regmap_anatop) { 312 unsigned int reg = mxs_phy->port_id ? 313 ANADIG_USB1_CHRG_DETECT_SET : 314 ANADIG_USB2_CHRG_DETECT_SET; 315 /* 316 * The external charger detector needs to be disabled, 317 * or the signal at DP will be poor 318 */ 319 regmap_write(mxs_phy->regmap_anatop, reg, 320 ANADIG_USB1_CHRG_DETECT_EN_B | 321 ANADIG_USB1_CHRG_DETECT_CHK_CHRG_B); 322 } 323 324 mxs_phy_tx_init(mxs_phy); 325 326 return 0; 327 328 disable_pll: 329 if (is_imx7ulp_phy(mxs_phy)) 330 mxs_phy_pll_enable(base, false); 331 return ret; 332 } 333 334 /* Return true if the vbus is there */ 335 static bool mxs_phy_get_vbus_status(struct mxs_phy *mxs_phy) 336 { 337 unsigned int vbus_value = 0; 338 339 if (!mxs_phy->regmap_anatop) 340 return false; 341 342 if (mxs_phy->port_id == 0) 343 regmap_read(mxs_phy->regmap_anatop, 344 ANADIG_USB1_VBUS_DET_STAT, 345 &vbus_value); 346 else if (mxs_phy->port_id == 1) 347 regmap_read(mxs_phy->regmap_anatop, 348 ANADIG_USB2_VBUS_DET_STAT, 349 &vbus_value); 350 351 if (vbus_value & BM_ANADIG_USB1_VBUS_DET_STAT_VBUS_VALID) 352 return true; 353 else 354 return false; 355 } 356 357 static void __mxs_phy_disconnect_line(struct mxs_phy *mxs_phy, bool disconnect) 358 { 359 void __iomem *base = mxs_phy->phy.io_priv; 360 u32 reg; 361 362 if (disconnect) 363 writel_relaxed(BM_USBPHY_DEBUG_CLKGATE, 364 base + HW_USBPHY_DEBUG_CLR); 365 366 if (mxs_phy->port_id == 0) { 367 reg = disconnect ? ANADIG_USB1_LOOPBACK_SET 368 : ANADIG_USB1_LOOPBACK_CLR; 369 regmap_write(mxs_phy->regmap_anatop, reg, 370 BM_ANADIG_USB1_LOOPBACK_UTMI_DIG_TST1 | 371 BM_ANADIG_USB1_LOOPBACK_TSTI_TX_EN); 372 } else if (mxs_phy->port_id == 1) { 373 reg = disconnect ? ANADIG_USB2_LOOPBACK_SET 374 : ANADIG_USB2_LOOPBACK_CLR; 375 regmap_write(mxs_phy->regmap_anatop, reg, 376 BM_ANADIG_USB2_LOOPBACK_UTMI_DIG_TST1 | 377 BM_ANADIG_USB2_LOOPBACK_TSTI_TX_EN); 378 } 379 380 if (!disconnect) 381 writel_relaxed(BM_USBPHY_DEBUG_CLKGATE, 382 base + HW_USBPHY_DEBUG_SET); 383 384 /* Delay some time, and let Linestate be SE0 for controller */ 385 if (disconnect) 386 usleep_range(500, 1000); 387 } 388 389 static bool mxs_phy_is_otg_host(struct mxs_phy *mxs_phy) 390 { 391 return mxs_phy->phy.last_event == USB_EVENT_ID; 392 } 393 394 static void mxs_phy_disconnect_line(struct mxs_phy *mxs_phy, bool on) 395 { 396 bool vbus_is_on = false; 397 enum usb_phy_events last_event = mxs_phy->phy.last_event; 398 399 /* If the SoCs don't need to disconnect line without vbus, quit */ 400 if (!(mxs_phy->data->flags & MXS_PHY_DISCONNECT_LINE_WITHOUT_VBUS)) 401 return; 402 403 /* If the SoCs don't have anatop, quit */ 404 if (!mxs_phy->regmap_anatop) 405 return; 406 407 vbus_is_on = mxs_phy_get_vbus_status(mxs_phy); 408 409 if (on && ((!vbus_is_on && !mxs_phy_is_otg_host(mxs_phy)) 410 || (last_event == USB_EVENT_VBUS))) 411 __mxs_phy_disconnect_line(mxs_phy, true); 412 else 413 __mxs_phy_disconnect_line(mxs_phy, false); 414 415 } 416 417 static int mxs_phy_init(struct usb_phy *phy) 418 { 419 int ret; 420 struct mxs_phy *mxs_phy = to_mxs_phy(phy); 421 422 mxs_phy_clock_switch_delay(); 423 ret = clk_prepare_enable(mxs_phy->clk); 424 if (ret) 425 return ret; 426 427 return mxs_phy_hw_init(mxs_phy); 428 } 429 430 static void mxs_phy_shutdown(struct usb_phy *phy) 431 { 432 struct mxs_phy *mxs_phy = to_mxs_phy(phy); 433 u32 value = BM_USBPHY_CTRL_ENVBUSCHG_WKUP | 434 BM_USBPHY_CTRL_ENDPDMCHG_WKUP | 435 BM_USBPHY_CTRL_ENIDCHG_WKUP | 436 BM_USBPHY_CTRL_ENAUTOSET_USBCLKS | 437 BM_USBPHY_CTRL_ENAUTOCLR_USBCLKGATE | 438 BM_USBPHY_CTRL_ENAUTOCLR_PHY_PWD | 439 BM_USBPHY_CTRL_ENAUTOCLR_CLKGATE | 440 BM_USBPHY_CTRL_ENAUTO_PWRON_PLL; 441 442 writel(value, phy->io_priv + HW_USBPHY_CTRL_CLR); 443 writel(0xffffffff, phy->io_priv + HW_USBPHY_PWD); 444 445 writel(BM_USBPHY_CTRL_CLKGATE, 446 phy->io_priv + HW_USBPHY_CTRL_SET); 447 448 if (is_imx7ulp_phy(mxs_phy)) 449 mxs_phy_pll_enable(phy->io_priv, false); 450 451 clk_disable_unprepare(mxs_phy->clk); 452 } 453 454 static bool mxs_phy_is_low_speed_connection(struct mxs_phy *mxs_phy) 455 { 456 unsigned int line_state; 457 /* bit definition is the same for all controllers */ 458 unsigned int dp_bit = BM_ANADIG_USB1_MISC_RX_VPIN_FS, 459 dm_bit = BM_ANADIG_USB1_MISC_RX_VMIN_FS; 460 unsigned int reg = ANADIG_USB1_MISC; 461 462 /* If the SoCs don't have anatop, quit */ 463 if (!mxs_phy->regmap_anatop) 464 return false; 465 466 if (mxs_phy->port_id == 0) 467 reg = ANADIG_USB1_MISC; 468 else if (mxs_phy->port_id == 1) 469 reg = ANADIG_USB2_MISC; 470 471 regmap_read(mxs_phy->regmap_anatop, reg, &line_state); 472 473 if ((line_state & (dp_bit | dm_bit)) == dm_bit) 474 return true; 475 else 476 return false; 477 } 478 479 static int mxs_phy_suspend(struct usb_phy *x, int suspend) 480 { 481 int ret; 482 struct mxs_phy *mxs_phy = to_mxs_phy(x); 483 bool low_speed_connection, vbus_is_on; 484 485 low_speed_connection = mxs_phy_is_low_speed_connection(mxs_phy); 486 vbus_is_on = mxs_phy_get_vbus_status(mxs_phy); 487 488 if (suspend) { 489 /* 490 * FIXME: Do not power down RXPWD1PT1 bit for low speed 491 * connect. The low speed connection will have problem at 492 * very rare cases during usb suspend and resume process. 493 */ 494 if (low_speed_connection & vbus_is_on) { 495 /* 496 * If value to be set as pwd value is not 0xffffffff, 497 * several 32Khz cycles are needed. 498 */ 499 mxs_phy_clock_switch_delay(); 500 writel(0xffbfffff, x->io_priv + HW_USBPHY_PWD); 501 } else { 502 writel(0xffffffff, x->io_priv + HW_USBPHY_PWD); 503 } 504 writel(BM_USBPHY_CTRL_CLKGATE, 505 x->io_priv + HW_USBPHY_CTRL_SET); 506 clk_disable_unprepare(mxs_phy->clk); 507 } else { 508 mxs_phy_clock_switch_delay(); 509 ret = clk_prepare_enable(mxs_phy->clk); 510 if (ret) 511 return ret; 512 writel(BM_USBPHY_CTRL_CLKGATE, 513 x->io_priv + HW_USBPHY_CTRL_CLR); 514 writel(0, x->io_priv + HW_USBPHY_PWD); 515 } 516 517 return 0; 518 } 519 520 static int mxs_phy_set_wakeup(struct usb_phy *x, bool enabled) 521 { 522 struct mxs_phy *mxs_phy = to_mxs_phy(x); 523 u32 value = BM_USBPHY_CTRL_ENVBUSCHG_WKUP | 524 BM_USBPHY_CTRL_ENDPDMCHG_WKUP | 525 BM_USBPHY_CTRL_ENIDCHG_WKUP; 526 if (enabled) { 527 mxs_phy_disconnect_line(mxs_phy, true); 528 writel_relaxed(value, x->io_priv + HW_USBPHY_CTRL_SET); 529 } else { 530 writel_relaxed(value, x->io_priv + HW_USBPHY_CTRL_CLR); 531 mxs_phy_disconnect_line(mxs_phy, false); 532 } 533 534 return 0; 535 } 536 537 static int mxs_phy_on_connect(struct usb_phy *phy, 538 enum usb_device_speed speed) 539 { 540 dev_dbg(phy->dev, "%s device has connected\n", 541 (speed == USB_SPEED_HIGH) ? "HS" : "FS/LS"); 542 543 if (speed == USB_SPEED_HIGH) 544 writel(BM_USBPHY_CTRL_ENHOSTDISCONDETECT, 545 phy->io_priv + HW_USBPHY_CTRL_SET); 546 547 return 0; 548 } 549 550 static int mxs_phy_on_disconnect(struct usb_phy *phy, 551 enum usb_device_speed speed) 552 { 553 dev_dbg(phy->dev, "%s device has disconnected\n", 554 (speed == USB_SPEED_HIGH) ? "HS" : "FS/LS"); 555 556 /* Sometimes, the speed is not high speed when the error occurs */ 557 if (readl(phy->io_priv + HW_USBPHY_CTRL) & 558 BM_USBPHY_CTRL_ENHOSTDISCONDETECT) 559 writel(BM_USBPHY_CTRL_ENHOSTDISCONDETECT, 560 phy->io_priv + HW_USBPHY_CTRL_CLR); 561 562 return 0; 563 } 564 565 #define MXS_USB_CHARGER_DATA_CONTACT_TIMEOUT 100 566 static int mxs_charger_data_contact_detect(struct mxs_phy *x) 567 { 568 struct regmap *regmap = x->regmap_anatop; 569 int i, stable_contact_count = 0; 570 u32 val; 571 572 /* Check if vbus is valid */ 573 regmap_read(regmap, ANADIG_USB1_VBUS_DET_STAT, &val); 574 if (!(val & ANADIG_USB1_VBUS_DET_STAT_VBUS_VALID)) { 575 dev_err(x->phy.dev, "vbus is not valid\n"); 576 return -EINVAL; 577 } 578 579 /* Enable charger detector */ 580 regmap_write(regmap, ANADIG_USB1_CHRG_DETECT_CLR, 581 ANADIG_USB1_CHRG_DETECT_EN_B); 582 /* 583 * - Do not check whether a charger is connected to the USB port 584 * - Check whether the USB plug has been in contact with each other 585 */ 586 regmap_write(regmap, ANADIG_USB1_CHRG_DETECT_SET, 587 ANADIG_USB1_CHRG_DETECT_CHK_CONTACT | 588 ANADIG_USB1_CHRG_DETECT_CHK_CHRG_B); 589 590 /* Check if plug is connected */ 591 for (i = 0; i < MXS_USB_CHARGER_DATA_CONTACT_TIMEOUT; i++) { 592 regmap_read(regmap, ANADIG_USB1_CHRG_DET_STAT, &val); 593 if (val & ANADIG_USB1_CHRG_DET_STAT_PLUG_CONTACT) { 594 stable_contact_count++; 595 if (stable_contact_count > 5) 596 /* Data pin makes contact */ 597 break; 598 else 599 usleep_range(5000, 10000); 600 } else { 601 stable_contact_count = 0; 602 usleep_range(5000, 6000); 603 } 604 } 605 606 if (i == MXS_USB_CHARGER_DATA_CONTACT_TIMEOUT) { 607 dev_err(x->phy.dev, 608 "Data pin can't make good contact.\n"); 609 /* Disable charger detector */ 610 regmap_write(regmap, ANADIG_USB1_CHRG_DETECT_SET, 611 ANADIG_USB1_CHRG_DETECT_EN_B | 612 ANADIG_USB1_CHRG_DETECT_CHK_CHRG_B); 613 return -ENXIO; 614 } 615 616 return 0; 617 } 618 619 static enum usb_charger_type mxs_charger_primary_detection(struct mxs_phy *x) 620 { 621 struct regmap *regmap = x->regmap_anatop; 622 enum usb_charger_type chgr_type = UNKNOWN_TYPE; 623 u32 val; 624 625 /* 626 * - Do check whether a charger is connected to the USB port 627 * - Do not Check whether the USB plug has been in contact with 628 * each other 629 */ 630 regmap_write(regmap, ANADIG_USB1_CHRG_DETECT_CLR, 631 ANADIG_USB1_CHRG_DETECT_CHK_CONTACT | 632 ANADIG_USB1_CHRG_DETECT_CHK_CHRG_B); 633 634 msleep(100); 635 636 /* Check if it is a charger */ 637 regmap_read(regmap, ANADIG_USB1_CHRG_DET_STAT, &val); 638 if (!(val & ANADIG_USB1_CHRG_DET_STAT_CHRG_DETECTED)) { 639 chgr_type = SDP_TYPE; 640 dev_dbg(x->phy.dev, "It is a standard downstream port\n"); 641 } 642 643 /* Disable charger detector */ 644 regmap_write(regmap, ANADIG_USB1_CHRG_DETECT_SET, 645 ANADIG_USB1_CHRG_DETECT_EN_B | 646 ANADIG_USB1_CHRG_DETECT_CHK_CHRG_B); 647 648 return chgr_type; 649 } 650 651 /* 652 * It must be called after DP is pulled up, which is used to 653 * differentiate DCP and CDP. 654 */ 655 static enum usb_charger_type mxs_charger_secondary_detection(struct mxs_phy *x) 656 { 657 struct regmap *regmap = x->regmap_anatop; 658 int val; 659 660 msleep(80); 661 662 regmap_read(regmap, ANADIG_USB1_CHRG_DET_STAT, &val); 663 if (val & ANADIG_USB1_CHRG_DET_STAT_DM_STATE) { 664 dev_dbg(x->phy.dev, "It is a dedicate charging port\n"); 665 return DCP_TYPE; 666 } else { 667 dev_dbg(x->phy.dev, "It is a charging downstream port\n"); 668 return CDP_TYPE; 669 } 670 } 671 672 static enum usb_charger_type mxs_phy_charger_detect(struct usb_phy *phy) 673 { 674 struct mxs_phy *mxs_phy = to_mxs_phy(phy); 675 struct regmap *regmap = mxs_phy->regmap_anatop; 676 void __iomem *base = phy->io_priv; 677 enum usb_charger_type chgr_type = UNKNOWN_TYPE; 678 679 if (!regmap) 680 return UNKNOWN_TYPE; 681 682 if (mxs_charger_data_contact_detect(mxs_phy)) 683 return chgr_type; 684 685 chgr_type = mxs_charger_primary_detection(mxs_phy); 686 687 if (chgr_type != SDP_TYPE) { 688 /* Pull up DP via test */ 689 writel_relaxed(BM_USBPHY_DEBUG_CLKGATE, 690 base + HW_USBPHY_DEBUG_CLR); 691 regmap_write(regmap, ANADIG_USB1_LOOPBACK_SET, 692 ANADIG_USB1_LOOPBACK_UTMI_TESTSTART); 693 694 chgr_type = mxs_charger_secondary_detection(mxs_phy); 695 696 /* Stop the test */ 697 regmap_write(regmap, ANADIG_USB1_LOOPBACK_CLR, 698 ANADIG_USB1_LOOPBACK_UTMI_TESTSTART); 699 writel_relaxed(BM_USBPHY_DEBUG_CLKGATE, 700 base + HW_USBPHY_DEBUG_SET); 701 } 702 703 return chgr_type; 704 } 705 706 static int mxs_phy_probe(struct platform_device *pdev) 707 { 708 void __iomem *base; 709 struct clk *clk; 710 struct mxs_phy *mxs_phy; 711 int ret; 712 struct device_node *np = pdev->dev.of_node; 713 u32 val; 714 715 base = devm_platform_ioremap_resource(pdev, 0); 716 if (IS_ERR(base)) 717 return PTR_ERR(base); 718 719 clk = devm_clk_get(&pdev->dev, NULL); 720 if (IS_ERR(clk)) { 721 dev_err(&pdev->dev, 722 "can't get the clock, err=%ld", PTR_ERR(clk)); 723 return PTR_ERR(clk); 724 } 725 726 mxs_phy = devm_kzalloc(&pdev->dev, sizeof(*mxs_phy), GFP_KERNEL); 727 if (!mxs_phy) 728 return -ENOMEM; 729 730 /* Some SoCs don't have anatop registers */ 731 if (of_property_present(np, "fsl,anatop")) { 732 mxs_phy->regmap_anatop = syscon_regmap_lookup_by_phandle 733 (np, "fsl,anatop"); 734 if (IS_ERR(mxs_phy->regmap_anatop)) { 735 dev_dbg(&pdev->dev, 736 "failed to find regmap for anatop\n"); 737 return PTR_ERR(mxs_phy->regmap_anatop); 738 } 739 } 740 741 /* Precompute which bits of the TX register are to be updated, if any */ 742 if (!of_property_read_u32(np, "fsl,tx-cal-45-dn-ohms", &val) && 743 val >= MXS_PHY_TX_CAL45_MIN && val <= MXS_PHY_TX_CAL45_MAX) { 744 /* Scale to a 4-bit value */ 745 val = (MXS_PHY_TX_CAL45_MAX - val) * 0xF 746 / (MXS_PHY_TX_CAL45_MAX - MXS_PHY_TX_CAL45_MIN); 747 mxs_phy->tx_reg_mask |= GM_USBPHY_TX_TXCAL45DN(~0); 748 mxs_phy->tx_reg_set |= GM_USBPHY_TX_TXCAL45DN(val); 749 } 750 751 if (!of_property_read_u32(np, "fsl,tx-cal-45-dp-ohms", &val) && 752 val >= MXS_PHY_TX_CAL45_MIN && val <= MXS_PHY_TX_CAL45_MAX) { 753 /* Scale to a 4-bit value. */ 754 val = (MXS_PHY_TX_CAL45_MAX - val) * 0xF 755 / (MXS_PHY_TX_CAL45_MAX - MXS_PHY_TX_CAL45_MIN); 756 mxs_phy->tx_reg_mask |= GM_USBPHY_TX_TXCAL45DP(~0); 757 mxs_phy->tx_reg_set |= GM_USBPHY_TX_TXCAL45DP(val); 758 } 759 760 if (!of_property_read_u32(np, "fsl,tx-d-cal", &val) && 761 val >= MXS_PHY_TX_D_CAL_MIN && val <= MXS_PHY_TX_D_CAL_MAX) { 762 /* Scale to a 4-bit value. Round up the values and heavily 763 * weight the rounding by adding 2/3 of the denominator. 764 */ 765 val = ((MXS_PHY_TX_D_CAL_MAX - val) * 0xF 766 + (MXS_PHY_TX_D_CAL_MAX - MXS_PHY_TX_D_CAL_MIN) * 2/3) 767 / (MXS_PHY_TX_D_CAL_MAX - MXS_PHY_TX_D_CAL_MIN); 768 mxs_phy->tx_reg_mask |= GM_USBPHY_TX_D_CAL(~0); 769 mxs_phy->tx_reg_set |= GM_USBPHY_TX_D_CAL(val); 770 } 771 772 ret = of_alias_get_id(np, "usbphy"); 773 if (ret < 0) 774 dev_dbg(&pdev->dev, "failed to get alias id, errno %d\n", ret); 775 mxs_phy->port_id = ret; 776 777 mxs_phy->phy.io_priv = base; 778 mxs_phy->phy.dev = &pdev->dev; 779 mxs_phy->phy.label = DRIVER_NAME; 780 mxs_phy->phy.init = mxs_phy_init; 781 mxs_phy->phy.shutdown = mxs_phy_shutdown; 782 mxs_phy->phy.set_suspend = mxs_phy_suspend; 783 mxs_phy->phy.notify_connect = mxs_phy_on_connect; 784 mxs_phy->phy.notify_disconnect = mxs_phy_on_disconnect; 785 mxs_phy->phy.type = USB_PHY_TYPE_USB2; 786 mxs_phy->phy.set_wakeup = mxs_phy_set_wakeup; 787 mxs_phy->phy.charger_detect = mxs_phy_charger_detect; 788 789 mxs_phy->clk = clk; 790 mxs_phy->data = of_device_get_match_data(&pdev->dev); 791 792 platform_set_drvdata(pdev, mxs_phy); 793 794 device_set_wakeup_capable(&pdev->dev, true); 795 796 return usb_add_phy_dev(&mxs_phy->phy); 797 } 798 799 static void mxs_phy_remove(struct platform_device *pdev) 800 { 801 struct mxs_phy *mxs_phy = platform_get_drvdata(pdev); 802 803 usb_remove_phy(&mxs_phy->phy); 804 } 805 806 #ifdef CONFIG_PM_SLEEP 807 static void mxs_phy_enable_ldo_in_suspend(struct mxs_phy *mxs_phy, bool on) 808 { 809 unsigned int reg = on ? ANADIG_ANA_MISC0_SET : ANADIG_ANA_MISC0_CLR; 810 811 /* If the SoCs don't have anatop, quit */ 812 if (!mxs_phy->regmap_anatop) 813 return; 814 815 if (is_imx6q_phy(mxs_phy)) 816 regmap_write(mxs_phy->regmap_anatop, reg, 817 BM_ANADIG_ANA_MISC0_STOP_MODE_CONFIG); 818 else if (is_imx6sl_phy(mxs_phy)) 819 regmap_write(mxs_phy->regmap_anatop, 820 reg, BM_ANADIG_ANA_MISC0_STOP_MODE_CONFIG_SL); 821 } 822 823 static int mxs_phy_system_suspend(struct device *dev) 824 { 825 struct mxs_phy *mxs_phy = dev_get_drvdata(dev); 826 827 if (device_may_wakeup(dev)) 828 mxs_phy_enable_ldo_in_suspend(mxs_phy, true); 829 830 return 0; 831 } 832 833 static int mxs_phy_system_resume(struct device *dev) 834 { 835 struct mxs_phy *mxs_phy = dev_get_drvdata(dev); 836 837 if (device_may_wakeup(dev)) 838 mxs_phy_enable_ldo_in_suspend(mxs_phy, false); 839 840 return 0; 841 } 842 #endif /* CONFIG_PM_SLEEP */ 843 844 static SIMPLE_DEV_PM_OPS(mxs_phy_pm, mxs_phy_system_suspend, 845 mxs_phy_system_resume); 846 847 static struct platform_driver mxs_phy_driver = { 848 .probe = mxs_phy_probe, 849 .remove_new = mxs_phy_remove, 850 .driver = { 851 .name = DRIVER_NAME, 852 .of_match_table = mxs_phy_dt_ids, 853 .pm = &mxs_phy_pm, 854 }, 855 }; 856 857 static int __init mxs_phy_module_init(void) 858 { 859 return platform_driver_register(&mxs_phy_driver); 860 } 861 postcore_initcall(mxs_phy_module_init); 862 863 static void __exit mxs_phy_module_exit(void) 864 { 865 platform_driver_unregister(&mxs_phy_driver); 866 } 867 module_exit(mxs_phy_module_exit); 868 869 MODULE_ALIAS("platform:mxs-usb-phy"); 870 MODULE_AUTHOR("Marek Vasut <marex@denx.de>"); 871 MODULE_AUTHOR("Richard Zhao <richard.zhao@freescale.com>"); 872 MODULE_DESCRIPTION("Freescale MXS USB PHY driver"); 873 MODULE_LICENSE("GPL"); 874