1/* 2 * drivers/usb/otg/ab8500_usb.c 3 * 4 * USB transceiver driver for AB8500 family chips 5 * 6 * Copyright (C) 2010-2013 ST-Ericsson AB 7 * Mian Yousaf Kaukab <mian.yousaf.kaukab@stericsson.com> 8 * Avinash Kumar <avinash.kumar@stericsson.com> 9 * Thirupathi Chippakurthy <thirupathi.chippakurthy@stericsson.com> 10 * 11 * This program is free software; you can redistribute it and/or modify 12 * it under the terms of the GNU General Public License as published by 13 * the Free Software Foundation; either version 2 of the License, or 14 * (at your option) any later version. 15 * 16 * This program is distributed in the hope that it will be useful, 17 * but WITHOUT ANY WARRANTY; without even the implied warranty of 18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 19 * GNU General Public License for more details. 20 * 21 * You should have received a copy of the GNU General Public License 22 * along with this program; if not, write to the Free Software 23 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 24 * 25 */ 26 27#include <linux/module.h> 28#include <linux/platform_device.h> 29#include <linux/usb/otg.h> 30#include <linux/slab.h> 31#include <linux/notifier.h> 32#include <linux/interrupt.h> 33#include <linux/delay.h> 34#include <linux/clk.h> 35#include <linux/err.h> 36#include <linux/mfd/abx500.h> 37#include <linux/mfd/abx500/ab8500.h> 38#include <linux/usb/musb-ux500.h> 39#include <linux/regulator/consumer.h> 40#include <linux/pinctrl/consumer.h> 41 42/* Bank AB8500_SYS_CTRL2_BLOCK */ 43#define AB8500_MAIN_WD_CTRL_REG 0x01 44 45/* Bank AB8500_USB */ 46#define AB8500_USB_LINE_STAT_REG 0x80 47#define AB8505_USB_LINE_STAT_REG 0x94 48#define AB8540_USB_LINK_STAT_REG 0x94 49#define AB9540_USB_LINK_STAT_REG 0x94 50#define AB8540_USB_OTG_CTL_REG 0x87 51#define AB8500_USB_PHY_CTRL_REG 0x8A 52#define AB8540_VBUS_CTRL_REG 0x82 53 54/* Bank AB8500_DEVELOPMENT */ 55#define AB8500_BANK12_ACCESS 0x00 56 57/* Bank AB8500_DEBUG */ 58#define AB8540_DEBUG 0x32 59#define AB8500_USB_PHY_TUNE1 0x05 60#define AB8500_USB_PHY_TUNE2 0x06 61#define AB8500_USB_PHY_TUNE3 0x07 62 63/* Bank AB8500_INTERRUPT */ 64#define AB8500_IT_SOURCE2_REG 0x01 65 66#define AB8500_BIT_OTG_STAT_ID (1 << 0) 67#define AB8500_BIT_PHY_CTRL_HOST_EN (1 << 0) 68#define AB8500_BIT_PHY_CTRL_DEVICE_EN (1 << 1) 69#define AB8500_BIT_WD_CTRL_ENABLE (1 << 0) 70#define AB8500_BIT_WD_CTRL_KICK (1 << 1) 71#define AB8500_BIT_SOURCE2_VBUSDET (1 << 7) 72#define AB8540_BIT_OTG_CTL_VBUS_VALID_ENA (1 << 0) 73#define AB8540_BIT_OTG_CTL_ID_HOST_ENA (1 << 1) 74#define AB8540_BIT_OTG_CTL_ID_DEV_ENA (1 << 5) 75#define AB8540_BIT_VBUS_CTRL_CHARG_DET_ENA (1 << 0) 76 77#define AB8500_WD_KICK_DELAY_US 100 /* usec */ 78#define AB8500_WD_V11_DISABLE_DELAY_US 100 /* usec */ 79#define AB8500_V20_31952_DISABLE_DELAY_US 100 /* usec */ 80 81/* Usb line status register */ 82enum ab8500_usb_link_status { 83 USB_LINK_NOT_CONFIGURED_8500 = 0, 84 USB_LINK_STD_HOST_NC_8500, 85 USB_LINK_STD_HOST_C_NS_8500, 86 USB_LINK_STD_HOST_C_S_8500, 87 USB_LINK_HOST_CHG_NM_8500, 88 USB_LINK_HOST_CHG_HS_8500, 89 USB_LINK_HOST_CHG_HS_CHIRP_8500, 90 USB_LINK_DEDICATED_CHG_8500, 91 USB_LINK_ACA_RID_A_8500, 92 USB_LINK_ACA_RID_B_8500, 93 USB_LINK_ACA_RID_C_NM_8500, 94 USB_LINK_ACA_RID_C_HS_8500, 95 USB_LINK_ACA_RID_C_HS_CHIRP_8500, 96 USB_LINK_HM_IDGND_8500, 97 USB_LINK_RESERVED_8500, 98 USB_LINK_NOT_VALID_LINK_8500, 99}; 100 101enum ab8505_usb_link_status { 102 USB_LINK_NOT_CONFIGURED_8505 = 0, 103 USB_LINK_STD_HOST_NC_8505, 104 USB_LINK_STD_HOST_C_NS_8505, 105 USB_LINK_STD_HOST_C_S_8505, 106 USB_LINK_CDP_8505, 107 USB_LINK_RESERVED0_8505, 108 USB_LINK_RESERVED1_8505, 109 USB_LINK_DEDICATED_CHG_8505, 110 USB_LINK_ACA_RID_A_8505, 111 USB_LINK_ACA_RID_B_8505, 112 USB_LINK_ACA_RID_C_NM_8505, 113 USB_LINK_RESERVED2_8505, 114 USB_LINK_RESERVED3_8505, 115 USB_LINK_HM_IDGND_8505, 116 USB_LINK_CHARGERPORT_NOT_OK_8505, 117 USB_LINK_CHARGER_DM_HIGH_8505, 118 USB_LINK_PHYEN_NO_VBUS_NO_IDGND_8505, 119 USB_LINK_STD_UPSTREAM_NO_IDGNG_NO_VBUS_8505, 120 USB_LINK_STD_UPSTREAM_8505, 121 USB_LINK_CHARGER_SE1_8505, 122 USB_LINK_CARKIT_CHGR_1_8505, 123 USB_LINK_CARKIT_CHGR_2_8505, 124 USB_LINK_ACA_DOCK_CHGR_8505, 125 USB_LINK_SAMSUNG_BOOT_CBL_PHY_EN_8505, 126 USB_LINK_SAMSUNG_BOOT_CBL_PHY_DISB_8505, 127 USB_LINK_SAMSUNG_UART_CBL_PHY_EN_8505, 128 USB_LINK_SAMSUNG_UART_CBL_PHY_DISB_8505, 129 USB_LINK_MOTOROLA_FACTORY_CBL_PHY_EN_8505, 130}; 131 132enum ab8540_usb_link_status { 133 USB_LINK_NOT_CONFIGURED_8540 = 0, 134 USB_LINK_STD_HOST_NC_8540, 135 USB_LINK_STD_HOST_C_NS_8540, 136 USB_LINK_STD_HOST_C_S_8540, 137 USB_LINK_CDP_8540, 138 USB_LINK_RESERVED0_8540, 139 USB_LINK_RESERVED1_8540, 140 USB_LINK_DEDICATED_CHG_8540, 141 USB_LINK_ACA_RID_A_8540, 142 USB_LINK_ACA_RID_B_8540, 143 USB_LINK_ACA_RID_C_NM_8540, 144 USB_LINK_RESERVED2_8540, 145 USB_LINK_RESERVED3_8540, 146 USB_LINK_HM_IDGND_8540, 147 USB_LINK_CHARGERPORT_NOT_OK_8540, 148 USB_LINK_CHARGER_DM_HIGH_8540, 149 USB_LINK_PHYEN_NO_VBUS_NO_IDGND_8540, 150 USB_LINK_STD_UPSTREAM_NO_IDGNG_VBUS_8540, 151 USB_LINK_STD_UPSTREAM_8540, 152 USB_LINK_CHARGER_SE1_8540, 153 USB_LINK_CARKIT_CHGR_1_8540, 154 USB_LINK_CARKIT_CHGR_2_8540, 155 USB_LINK_ACA_DOCK_CHGR_8540, 156 USB_LINK_SAMSUNG_BOOT_CBL_PHY_EN_8540, 157 USB_LINK_SAMSUNG_BOOT_CBL_PHY_DISB_8540, 158 USB_LINK_SAMSUNG_UART_CBL_PHY_EN_8540, 159 USB_LINK_SAMSUNG_UART_CBL_PHY_DISB_8540, 160 USB_LINK_MOTOROLA_FACTORY_CBL_PHY_EN_8540 161}; 162 163enum ab9540_usb_link_status { 164 USB_LINK_NOT_CONFIGURED_9540 = 0, 165 USB_LINK_STD_HOST_NC_9540, 166 USB_LINK_STD_HOST_C_NS_9540, 167 USB_LINK_STD_HOST_C_S_9540, 168 USB_LINK_CDP_9540, 169 USB_LINK_RESERVED0_9540, 170 USB_LINK_RESERVED1_9540, 171 USB_LINK_DEDICATED_CHG_9540, 172 USB_LINK_ACA_RID_A_9540, 173 USB_LINK_ACA_RID_B_9540, 174 USB_LINK_ACA_RID_C_NM_9540, 175 USB_LINK_RESERVED2_9540, 176 USB_LINK_RESERVED3_9540, 177 USB_LINK_HM_IDGND_9540, 178 USB_LINK_CHARGERPORT_NOT_OK_9540, 179 USB_LINK_CHARGER_DM_HIGH_9540, 180 USB_LINK_PHYEN_NO_VBUS_NO_IDGND_9540, 181 USB_LINK_STD_UPSTREAM_NO_IDGNG_VBUS_9540, 182 USB_LINK_STD_UPSTREAM_9540, 183 USB_LINK_CHARGER_SE1_9540, 184 USB_LINK_CARKIT_CHGR_1_9540, 185 USB_LINK_CARKIT_CHGR_2_9540, 186 USB_LINK_ACA_DOCK_CHGR_9540, 187 USB_LINK_SAMSUNG_BOOT_CBL_PHY_EN_9540, 188 USB_LINK_SAMSUNG_BOOT_CBL_PHY_DISB_9540, 189 USB_LINK_SAMSUNG_UART_CBL_PHY_EN_9540, 190 USB_LINK_SAMSUNG_UART_CBL_PHY_DISB_9540, 191 USB_LINK_MOTOROLA_FACTORY_CBL_PHY_EN_9540 192}; 193 194enum ab8500_usb_mode { 195 USB_IDLE = 0, 196 USB_PERIPHERAL, 197 USB_HOST, 198 USB_DEDICATED_CHG 199}; 200 201/* Register USB_LINK_STATUS interrupt */ 202#define AB8500_USB_FLAG_USE_LINK_STATUS_IRQ (1 << 0) 203/* Register ID_WAKEUP_F interrupt */ 204#define AB8500_USB_FLAG_USE_ID_WAKEUP_IRQ (1 << 1) 205/* Register VBUS_DET_F interrupt */ 206#define AB8500_USB_FLAG_USE_VBUS_DET_IRQ (1 << 2) 207/* Driver is using the ab-iddet driver*/ 208#define AB8500_USB_FLAG_USE_AB_IDDET (1 << 3) 209/* Enable setting regulators voltage */ 210#define AB8500_USB_FLAG_REGULATOR_SET_VOLTAGE (1 << 4) 211/* Enable the check_vbus_status workaround */ 212#define AB8500_USB_FLAG_USE_CHECK_VBUS_STATUS (1 << 5) 213/* Enable the vbus host workaround */ 214#define AB8500_USB_FLAG_USE_VBUS_HOST_QUIRK (1 << 6) 215 216struct ab8500_usb { 217 struct usb_phy phy; 218 struct device *dev; 219 struct ab8500 *ab8500; 220 unsigned vbus_draw; 221 struct work_struct phy_dis_work; 222 struct work_struct vbus_event_work; 223 enum ab8500_usb_mode mode; 224 struct clk *sysclk; 225 struct regulator *v_ape; 226 struct regulator *v_musb; 227 struct regulator *v_ulpi; 228 int saved_v_ulpi; 229 int previous_link_status_state; 230 struct pinctrl *pinctrl; 231 struct pinctrl_state *pins_sleep; 232 bool enabled_charging_detection; 233 unsigned int flags; 234}; 235 236static inline struct ab8500_usb *phy_to_ab(struct usb_phy *x) 237{ 238 return container_of(x, struct ab8500_usb, phy); 239} 240 241static void ab8500_usb_wd_workaround(struct ab8500_usb *ab) 242{ 243 abx500_set_register_interruptible(ab->dev, 244 AB8500_SYS_CTRL2_BLOCK, 245 AB8500_MAIN_WD_CTRL_REG, 246 AB8500_BIT_WD_CTRL_ENABLE); 247 248 udelay(AB8500_WD_KICK_DELAY_US); 249 250 abx500_set_register_interruptible(ab->dev, 251 AB8500_SYS_CTRL2_BLOCK, 252 AB8500_MAIN_WD_CTRL_REG, 253 (AB8500_BIT_WD_CTRL_ENABLE 254 | AB8500_BIT_WD_CTRL_KICK)); 255 256 udelay(AB8500_WD_V11_DISABLE_DELAY_US); 257 258 abx500_set_register_interruptible(ab->dev, 259 AB8500_SYS_CTRL2_BLOCK, 260 AB8500_MAIN_WD_CTRL_REG, 261 0); 262} 263 264static void ab8500_usb_regulator_enable(struct ab8500_usb *ab) 265{ 266 int ret, volt; 267 268 ret = regulator_enable(ab->v_ape); 269 if (ret) 270 dev_err(ab->dev, "Failed to enable v-ape\n"); 271 272 if (ab->flags & AB8500_USB_FLAG_REGULATOR_SET_VOLTAGE) { 273 ab->saved_v_ulpi = regulator_get_voltage(ab->v_ulpi); 274 if (ab->saved_v_ulpi < 0) 275 dev_err(ab->dev, "Failed to get v_ulpi voltage\n"); 276 277 ret = regulator_set_voltage(ab->v_ulpi, 1300000, 1350000); 278 if (ret < 0) 279 dev_err(ab->dev, "Failed to set the Vintcore to 1.3V, ret=%d\n", 280 ret); 281 282 ret = regulator_set_optimum_mode(ab->v_ulpi, 28000); 283 if (ret < 0) 284 dev_err(ab->dev, "Failed to set optimum mode (ret=%d)\n", 285 ret); 286 } 287 288 ret = regulator_enable(ab->v_ulpi); 289 if (ret) 290 dev_err(ab->dev, "Failed to enable vddulpivio18\n"); 291 292 if (ab->flags & AB8500_USB_FLAG_REGULATOR_SET_VOLTAGE) { 293 volt = regulator_get_voltage(ab->v_ulpi); 294 if ((volt != 1300000) && (volt != 1350000)) 295 dev_err(ab->dev, "Vintcore is not set to 1.3V volt=%d\n", 296 volt); 297 } 298 299 ret = regulator_enable(ab->v_musb); 300 if (ret) 301 dev_err(ab->dev, "Failed to enable musb_1v8\n"); 302} 303 304static void ab8500_usb_regulator_disable(struct ab8500_usb *ab) 305{ 306 int ret; 307 308 regulator_disable(ab->v_musb); 309 310 regulator_disable(ab->v_ulpi); 311 312 /* USB is not the only consumer of Vintcore, restore old settings */ 313 if (ab->flags & AB8500_USB_FLAG_REGULATOR_SET_VOLTAGE) { 314 if (ab->saved_v_ulpi > 0) { 315 ret = regulator_set_voltage(ab->v_ulpi, 316 ab->saved_v_ulpi, ab->saved_v_ulpi); 317 if (ret < 0) 318 dev_err(ab->dev, "Failed to set the Vintcore to %duV, ret=%d\n", 319 ab->saved_v_ulpi, ret); 320 } 321 322 ret = regulator_set_optimum_mode(ab->v_ulpi, 0); 323 if (ret < 0) 324 dev_err(ab->dev, "Failed to set optimum mode (ret=%d)\n", 325 ret); 326 } 327 328 regulator_disable(ab->v_ape); 329} 330 331static void ab8500_usb_wd_linkstatus(struct ab8500_usb *ab, u8 bit) 332{ 333 /* Workaround for v2.0 bug # 31952 */ 334 if (is_ab8500_2p0(ab->ab8500)) { 335 abx500_mask_and_set_register_interruptible(ab->dev, 336 AB8500_USB, AB8500_USB_PHY_CTRL_REG, 337 bit, bit); 338 udelay(AB8500_V20_31952_DISABLE_DELAY_US); 339 } 340} 341 342static void ab8500_usb_phy_enable(struct ab8500_usb *ab, bool sel_host) 343{ 344 u8 bit; 345 bit = sel_host ? AB8500_BIT_PHY_CTRL_HOST_EN : 346 AB8500_BIT_PHY_CTRL_DEVICE_EN; 347 348 /* mux and configure USB pins to DEFAULT state */ 349 ab->pinctrl = pinctrl_get_select(ab->dev, PINCTRL_STATE_DEFAULT); 350 if (IS_ERR(ab->pinctrl)) 351 dev_err(ab->dev, "could not get/set default pinstate\n"); 352 353 if (clk_prepare_enable(ab->sysclk)) 354 dev_err(ab->dev, "can't prepare/enable clock\n"); 355 356 ab8500_usb_regulator_enable(ab); 357 358 abx500_mask_and_set_register_interruptible(ab->dev, 359 AB8500_USB, AB8500_USB_PHY_CTRL_REG, 360 bit, bit); 361 362 if (ab->flags & AB8500_USB_FLAG_USE_VBUS_HOST_QUIRK) { 363 if (sel_host) 364 abx500_set_register_interruptible(ab->dev, 365 AB8500_USB, AB8540_USB_OTG_CTL_REG, 366 AB8540_BIT_OTG_CTL_VBUS_VALID_ENA | 367 AB8540_BIT_OTG_CTL_ID_HOST_ENA | 368 AB8540_BIT_OTG_CTL_ID_DEV_ENA); 369 } 370} 371 372static void ab8500_usb_phy_disable(struct ab8500_usb *ab, bool sel_host) 373{ 374 u8 bit; 375 bit = sel_host ? AB8500_BIT_PHY_CTRL_HOST_EN : 376 AB8500_BIT_PHY_CTRL_DEVICE_EN; 377 378 ab8500_usb_wd_linkstatus(ab, bit); 379 380 abx500_mask_and_set_register_interruptible(ab->dev, 381 AB8500_USB, AB8500_USB_PHY_CTRL_REG, 382 bit, 0); 383 384 /* Needed to disable the phy.*/ 385 ab8500_usb_wd_workaround(ab); 386 387 clk_disable_unprepare(ab->sysclk); 388 389 ab8500_usb_regulator_disable(ab); 390 391 if (!IS_ERR(ab->pinctrl)) { 392 /* configure USB pins to SLEEP state */ 393 ab->pins_sleep = pinctrl_lookup_state(ab->pinctrl, 394 PINCTRL_STATE_SLEEP); 395 396 if (IS_ERR(ab->pins_sleep)) 397 dev_dbg(ab->dev, "could not get sleep pinstate\n"); 398 else if (pinctrl_select_state(ab->pinctrl, ab->pins_sleep)) 399 dev_err(ab->dev, "could not set pins to sleep state\n"); 400 401 /* 402 * as USB pins are shared with iddet, release them to allow 403 * iddet to request them 404 */ 405 pinctrl_put(ab->pinctrl); 406 } 407} 408 409#define ab8500_usb_host_phy_en(ab) ab8500_usb_phy_enable(ab, true) 410#define ab8500_usb_host_phy_dis(ab) ab8500_usb_phy_disable(ab, true) 411#define ab8500_usb_peri_phy_en(ab) ab8500_usb_phy_enable(ab, false) 412#define ab8500_usb_peri_phy_dis(ab) ab8500_usb_phy_disable(ab, false) 413 414static int ab9540_usb_link_status_update(struct ab8500_usb *ab, 415 enum ab9540_usb_link_status lsts) 416{ 417 enum ux500_musb_vbus_id_status event = 0; 418 419 dev_dbg(ab->dev, "ab9540_usb_link_status_update %d\n", lsts); 420 421 if (ab->previous_link_status_state == USB_LINK_HM_IDGND_9540 && 422 (lsts == USB_LINK_STD_HOST_C_NS_9540 || 423 lsts == USB_LINK_STD_HOST_NC_9540)) 424 return 0; 425 426 if (ab->previous_link_status_state == USB_LINK_ACA_RID_A_9540 && 427 (lsts == USB_LINK_STD_HOST_NC_9540)) 428 return 0; 429 430 ab->previous_link_status_state = lsts; 431 432 switch (lsts) { 433 case USB_LINK_ACA_RID_B_9540: 434 event = UX500_MUSB_RIDB; 435 case USB_LINK_NOT_CONFIGURED_9540: 436 case USB_LINK_RESERVED0_9540: 437 case USB_LINK_RESERVED1_9540: 438 case USB_LINK_RESERVED2_9540: 439 case USB_LINK_RESERVED3_9540: 440 if (ab->mode == USB_PERIPHERAL) 441 atomic_notifier_call_chain(&ab->phy.notifier, 442 UX500_MUSB_CLEAN, &ab->vbus_draw); 443 ab->mode = USB_IDLE; 444 ab->phy.otg->default_a = false; 445 ab->vbus_draw = 0; 446 if (event != UX500_MUSB_RIDB) 447 event = UX500_MUSB_NONE; 448 /* Fallback to default B_IDLE as nothing is connected. */ 449 ab->phy.state = OTG_STATE_B_IDLE; 450 break; 451 452 case USB_LINK_ACA_RID_C_NM_9540: 453 event = UX500_MUSB_RIDC; 454 case USB_LINK_STD_HOST_NC_9540: 455 case USB_LINK_STD_HOST_C_NS_9540: 456 case USB_LINK_STD_HOST_C_S_9540: 457 case USB_LINK_CDP_9540: 458 if (ab->mode == USB_HOST) { 459 ab->mode = USB_PERIPHERAL; 460 ab8500_usb_host_phy_dis(ab); 461 ab8500_usb_peri_phy_en(ab); 462 atomic_notifier_call_chain(&ab->phy.notifier, 463 UX500_MUSB_PREPARE, &ab->vbus_draw); 464 } 465 if (ab->mode == USB_IDLE) { 466 ab->mode = USB_PERIPHERAL; 467 ab8500_usb_peri_phy_en(ab); 468 atomic_notifier_call_chain(&ab->phy.notifier, 469 UX500_MUSB_PREPARE, &ab->vbus_draw); 470 } 471 if (event != UX500_MUSB_RIDC) 472 event = UX500_MUSB_VBUS; 473 break; 474 475 case USB_LINK_ACA_RID_A_9540: 476 event = UX500_MUSB_RIDA; 477 case USB_LINK_HM_IDGND_9540: 478 case USB_LINK_STD_UPSTREAM_9540: 479 if (ab->mode == USB_PERIPHERAL) { 480 ab->mode = USB_HOST; 481 ab8500_usb_peri_phy_dis(ab); 482 ab8500_usb_host_phy_en(ab); 483 atomic_notifier_call_chain(&ab->phy.notifier, 484 UX500_MUSB_PREPARE, &ab->vbus_draw); 485 } 486 if (ab->mode == USB_IDLE) { 487 ab->mode = USB_HOST; 488 ab8500_usb_host_phy_en(ab); 489 atomic_notifier_call_chain(&ab->phy.notifier, 490 UX500_MUSB_PREPARE, &ab->vbus_draw); 491 } 492 ab->phy.otg->default_a = true; 493 if (event != UX500_MUSB_RIDA) 494 event = UX500_MUSB_ID; 495 496 atomic_notifier_call_chain(&ab->phy.notifier, 497 event, &ab->vbus_draw); 498 break; 499 500 case USB_LINK_DEDICATED_CHG_9540: 501 ab->mode = USB_DEDICATED_CHG; 502 event = UX500_MUSB_CHARGER; 503 atomic_notifier_call_chain(&ab->phy.notifier, 504 event, &ab->vbus_draw); 505 break; 506 507 case USB_LINK_PHYEN_NO_VBUS_NO_IDGND_9540: 508 case USB_LINK_STD_UPSTREAM_NO_IDGNG_VBUS_9540: 509 if (!(is_ab9540_2p0_or_earlier(ab->ab8500))) { 510 event = UX500_MUSB_NONE; 511 if (ab->mode == USB_HOST) { 512 ab->phy.otg->default_a = false; 513 ab->vbus_draw = 0; 514 atomic_notifier_call_chain(&ab->phy.notifier, 515 event, &ab->vbus_draw); 516 ab8500_usb_host_phy_dis(ab); 517 ab->mode = USB_IDLE; 518 } 519 if (ab->mode == USB_PERIPHERAL) { 520 atomic_notifier_call_chain(&ab->phy.notifier, 521 event, &ab->vbus_draw); 522 ab8500_usb_peri_phy_dis(ab); 523 atomic_notifier_call_chain(&ab->phy.notifier, 524 UX500_MUSB_CLEAN, 525 &ab->vbus_draw); 526 ab->mode = USB_IDLE; 527 ab->phy.otg->default_a = false; 528 ab->vbus_draw = 0; 529 } 530 } 531 break; 532 533 default: 534 break; 535 } 536 537 return 0; 538} 539 540static int ab8540_usb_link_status_update(struct ab8500_usb *ab, 541 enum ab8540_usb_link_status lsts) 542{ 543 enum ux500_musb_vbus_id_status event = 0; 544 545 dev_dbg(ab->dev, "ab8540_usb_link_status_update %d\n", lsts); 546 547 if (ab->enabled_charging_detection) { 548 /* Disable USB Charger detection */ 549 abx500_mask_and_set_register_interruptible(ab->dev, 550 AB8500_USB, AB8540_VBUS_CTRL_REG, 551 AB8540_BIT_VBUS_CTRL_CHARG_DET_ENA, 0x00); 552 ab->enabled_charging_detection = false; 553 } 554 555 /* 556 * Spurious link_status interrupts are seen in case of a 557 * disconnection of a device in IDGND and RIDA stage 558 */ 559 if (ab->previous_link_status_state == USB_LINK_HM_IDGND_8540 && 560 (lsts == USB_LINK_STD_HOST_C_NS_8540 || 561 lsts == USB_LINK_STD_HOST_NC_8540)) 562 return 0; 563 564 if (ab->previous_link_status_state == USB_LINK_ACA_RID_A_8540 && 565 (lsts == USB_LINK_STD_HOST_NC_8540)) 566 return 0; 567 568 ab->previous_link_status_state = lsts; 569 570 switch (lsts) { 571 case USB_LINK_ACA_RID_B_8540: 572 event = UX500_MUSB_RIDB; 573 case USB_LINK_NOT_CONFIGURED_8540: 574 case USB_LINK_RESERVED0_8540: 575 case USB_LINK_RESERVED1_8540: 576 case USB_LINK_RESERVED2_8540: 577 case USB_LINK_RESERVED3_8540: 578 ab->mode = USB_IDLE; 579 ab->phy.otg->default_a = false; 580 ab->vbus_draw = 0; 581 if (event != UX500_MUSB_RIDB) 582 event = UX500_MUSB_NONE; 583 /* 584 * Fallback to default B_IDLE as nothing 585 * is connected 586 */ 587 ab->phy.state = OTG_STATE_B_IDLE; 588 break; 589 590 case USB_LINK_ACA_RID_C_NM_8540: 591 event = UX500_MUSB_RIDC; 592 case USB_LINK_STD_HOST_NC_8540: 593 case USB_LINK_STD_HOST_C_NS_8540: 594 case USB_LINK_STD_HOST_C_S_8540: 595 case USB_LINK_CDP_8540: 596 if (ab->mode == USB_IDLE) { 597 ab->mode = USB_PERIPHERAL; 598 ab8500_usb_peri_phy_en(ab); 599 atomic_notifier_call_chain(&ab->phy.notifier, 600 UX500_MUSB_PREPARE, &ab->vbus_draw); 601 } 602 if (event != UX500_MUSB_RIDC) 603 event = UX500_MUSB_VBUS; 604 break; 605 606 case USB_LINK_ACA_RID_A_8540: 607 case USB_LINK_ACA_DOCK_CHGR_8540: 608 event = UX500_MUSB_RIDA; 609 case USB_LINK_HM_IDGND_8540: 610 case USB_LINK_STD_UPSTREAM_8540: 611 if (ab->mode == USB_IDLE) { 612 ab->mode = USB_HOST; 613 ab8500_usb_host_phy_en(ab); 614 atomic_notifier_call_chain(&ab->phy.notifier, 615 UX500_MUSB_PREPARE, &ab->vbus_draw); 616 } 617 ab->phy.otg->default_a = true; 618 if (event != UX500_MUSB_RIDA) 619 event = UX500_MUSB_ID; 620 atomic_notifier_call_chain(&ab->phy.notifier, 621 event, &ab->vbus_draw); 622 break; 623 624 case USB_LINK_DEDICATED_CHG_8540: 625 ab->mode = USB_DEDICATED_CHG; 626 event = UX500_MUSB_CHARGER; 627 atomic_notifier_call_chain(&ab->phy.notifier, 628 event, &ab->vbus_draw); 629 break; 630 631 case USB_LINK_PHYEN_NO_VBUS_NO_IDGND_8540: 632 case USB_LINK_STD_UPSTREAM_NO_IDGNG_VBUS_8540: 633 event = UX500_MUSB_NONE; 634 if (ab->mode == USB_HOST) { 635 ab->phy.otg->default_a = false; 636 ab->vbus_draw = 0; 637 atomic_notifier_call_chain(&ab->phy.notifier, 638 event, &ab->vbus_draw); 639 ab8500_usb_host_phy_dis(ab); 640 ab->mode = USB_IDLE; 641 } 642 if (ab->mode == USB_PERIPHERAL) { 643 atomic_notifier_call_chain(&ab->phy.notifier, 644 event, &ab->vbus_draw); 645 ab8500_usb_peri_phy_dis(ab); 646 atomic_notifier_call_chain(&ab->phy.notifier, 647 UX500_MUSB_CLEAN, &ab->vbus_draw); 648 ab->mode = USB_IDLE; 649 ab->phy.otg->default_a = false; 650 ab->vbus_draw = 0; 651 } 652 break; 653 654 default: 655 event = UX500_MUSB_NONE; 656 break; 657 } 658 659 return 0; 660} 661 662static int ab8505_usb_link_status_update(struct ab8500_usb *ab, 663 enum ab8505_usb_link_status lsts) 664{ 665 enum ux500_musb_vbus_id_status event = 0; 666 667 dev_dbg(ab->dev, "ab8505_usb_link_status_update %d\n", lsts); 668 669 /* 670 * Spurious link_status interrupts are seen at the time of 671 * disconnection of a device in RIDA state 672 */ 673 if (ab->previous_link_status_state == USB_LINK_ACA_RID_A_8505 && 674 (lsts == USB_LINK_STD_HOST_NC_8505)) 675 return 0; 676 677 ab->previous_link_status_state = lsts; 678 679 switch (lsts) { 680 case USB_LINK_ACA_RID_B_8505: 681 event = UX500_MUSB_RIDB; 682 case USB_LINK_NOT_CONFIGURED_8505: 683 case USB_LINK_RESERVED0_8505: 684 case USB_LINK_RESERVED1_8505: 685 case USB_LINK_RESERVED2_8505: 686 case USB_LINK_RESERVED3_8505: 687 ab->mode = USB_IDLE; 688 ab->phy.otg->default_a = false; 689 ab->vbus_draw = 0; 690 if (event != UX500_MUSB_RIDB) 691 event = UX500_MUSB_NONE; 692 /* 693 * Fallback to default B_IDLE as nothing 694 * is connected 695 */ 696 ab->phy.state = OTG_STATE_B_IDLE; 697 break; 698 699 case USB_LINK_ACA_RID_C_NM_8505: 700 event = UX500_MUSB_RIDC; 701 case USB_LINK_STD_HOST_NC_8505: 702 case USB_LINK_STD_HOST_C_NS_8505: 703 case USB_LINK_STD_HOST_C_S_8505: 704 case USB_LINK_CDP_8505: 705 if (ab->mode == USB_IDLE) { 706 ab->mode = USB_PERIPHERAL; 707 ab8500_usb_peri_phy_en(ab); 708 atomic_notifier_call_chain(&ab->phy.notifier, 709 UX500_MUSB_PREPARE, &ab->vbus_draw); 710 } 711 if (event != UX500_MUSB_RIDC) 712 event = UX500_MUSB_VBUS; 713 break; 714 715 case USB_LINK_ACA_RID_A_8505: 716 case USB_LINK_ACA_DOCK_CHGR_8505: 717 event = UX500_MUSB_RIDA; 718 case USB_LINK_HM_IDGND_8505: 719 if (ab->mode == USB_IDLE) { 720 ab->mode = USB_HOST; 721 ab8500_usb_host_phy_en(ab); 722 atomic_notifier_call_chain(&ab->phy.notifier, 723 UX500_MUSB_PREPARE, &ab->vbus_draw); 724 } 725 ab->phy.otg->default_a = true; 726 if (event != UX500_MUSB_RIDA) 727 event = UX500_MUSB_ID; 728 atomic_notifier_call_chain(&ab->phy.notifier, 729 event, &ab->vbus_draw); 730 break; 731 732 case USB_LINK_DEDICATED_CHG_8505: 733 ab->mode = USB_DEDICATED_CHG; 734 event = UX500_MUSB_CHARGER; 735 atomic_notifier_call_chain(&ab->phy.notifier, 736 event, &ab->vbus_draw); 737 break; 738 739 default: 740 break; 741 } 742 743 return 0; 744} 745 746static int ab8500_usb_link_status_update(struct ab8500_usb *ab, 747 enum ab8500_usb_link_status lsts) 748{ 749 enum ux500_musb_vbus_id_status event = 0; 750 751 dev_dbg(ab->dev, "ab8500_usb_link_status_update %d\n", lsts); 752 753 /* 754 * Spurious link_status interrupts are seen in case of a 755 * disconnection of a device in IDGND and RIDA stage 756 */ 757 if (ab->previous_link_status_state == USB_LINK_HM_IDGND_8500 && 758 (lsts == USB_LINK_STD_HOST_C_NS_8500 || 759 lsts == USB_LINK_STD_HOST_NC_8500)) 760 return 0; 761 762 if (ab->previous_link_status_state == USB_LINK_ACA_RID_A_8500 && 763 lsts == USB_LINK_STD_HOST_NC_8500) 764 return 0; 765 766 ab->previous_link_status_state = lsts; 767 768 switch (lsts) { 769 case USB_LINK_ACA_RID_B_8500: 770 event = UX500_MUSB_RIDB; 771 case USB_LINK_NOT_CONFIGURED_8500: 772 case USB_LINK_NOT_VALID_LINK_8500: 773 ab->mode = USB_IDLE; 774 ab->phy.otg->default_a = false; 775 ab->vbus_draw = 0; 776 if (event != UX500_MUSB_RIDB) 777 event = UX500_MUSB_NONE; 778 /* Fallback to default B_IDLE as nothing is connected */ 779 ab->phy.state = OTG_STATE_B_IDLE; 780 break; 781 782 case USB_LINK_ACA_RID_C_NM_8500: 783 case USB_LINK_ACA_RID_C_HS_8500: 784 case USB_LINK_ACA_RID_C_HS_CHIRP_8500: 785 event = UX500_MUSB_RIDC; 786 case USB_LINK_STD_HOST_NC_8500: 787 case USB_LINK_STD_HOST_C_NS_8500: 788 case USB_LINK_STD_HOST_C_S_8500: 789 case USB_LINK_HOST_CHG_NM_8500: 790 case USB_LINK_HOST_CHG_HS_8500: 791 case USB_LINK_HOST_CHG_HS_CHIRP_8500: 792 if (ab->mode == USB_IDLE) { 793 ab->mode = USB_PERIPHERAL; 794 ab8500_usb_peri_phy_en(ab); 795 atomic_notifier_call_chain(&ab->phy.notifier, 796 UX500_MUSB_PREPARE, &ab->vbus_draw); 797 } 798 if (event != UX500_MUSB_RIDC) 799 event = UX500_MUSB_VBUS; 800 break; 801 802 case USB_LINK_ACA_RID_A_8500: 803 event = UX500_MUSB_RIDA; 804 case USB_LINK_HM_IDGND_8500: 805 if (ab->mode == USB_IDLE) { 806 ab->mode = USB_HOST; 807 ab8500_usb_host_phy_en(ab); 808 atomic_notifier_call_chain(&ab->phy.notifier, 809 UX500_MUSB_PREPARE, &ab->vbus_draw); 810 } 811 ab->phy.otg->default_a = true; 812 if (event != UX500_MUSB_RIDA) 813 event = UX500_MUSB_ID; 814 atomic_notifier_call_chain(&ab->phy.notifier, 815 event, &ab->vbus_draw); 816 break; 817 818 case USB_LINK_DEDICATED_CHG_8500: 819 ab->mode = USB_DEDICATED_CHG; 820 event = UX500_MUSB_CHARGER; 821 atomic_notifier_call_chain(&ab->phy.notifier, 822 event, &ab->vbus_draw); 823 break; 824 825 case USB_LINK_RESERVED_8500: 826 break; 827 } 828 829 return 0; 830} 831 832/* 833 * Connection Sequence: 834 * 1. Link Status Interrupt 835 * 2. Enable AB clock 836 * 3. Enable AB regulators 837 * 4. Enable USB phy 838 * 5. Reset the musb controller 839 * 6. Switch the ULPI GPIO pins to fucntion mode 840 * 7. Enable the musb Peripheral5 clock 841 * 8. Restore MUSB context 842 */ 843static int abx500_usb_link_status_update(struct ab8500_usb *ab) 844{ 845 u8 reg; 846 int ret = 0; 847 848 if (is_ab8500(ab->ab8500)) { 849 enum ab8500_usb_link_status lsts; 850 851 abx500_get_register_interruptible(ab->dev, 852 AB8500_USB, AB8500_USB_LINE_STAT_REG, ®); 853 lsts = (reg >> 3) & 0x0F; 854 ret = ab8500_usb_link_status_update(ab, lsts); 855 } else if (is_ab8505(ab->ab8500)) { 856 enum ab8505_usb_link_status lsts; 857 858 abx500_get_register_interruptible(ab->dev, 859 AB8500_USB, AB8505_USB_LINE_STAT_REG, ®); 860 lsts = (reg >> 3) & 0x1F; 861 ret = ab8505_usb_link_status_update(ab, lsts); 862 } else if (is_ab8540(ab->ab8500)) { 863 enum ab8540_usb_link_status lsts; 864 865 abx500_get_register_interruptible(ab->dev, 866 AB8500_USB, AB8540_USB_LINK_STAT_REG, ®); 867 lsts = (reg >> 3) & 0xFF; 868 ret = ab8540_usb_link_status_update(ab, lsts); 869 } else if (is_ab9540(ab->ab8500)) { 870 enum ab9540_usb_link_status lsts; 871 872 abx500_get_register_interruptible(ab->dev, 873 AB8500_USB, AB9540_USB_LINK_STAT_REG, ®); 874 lsts = (reg >> 3) & 0xFF; 875 ret = ab9540_usb_link_status_update(ab, lsts); 876 } 877 878 return ret; 879} 880 881/* 882 * Disconnection Sequence: 883 * 1. Disconect Interrupt 884 * 2. Disable regulators 885 * 3. Disable AB clock 886 * 4. Disable the Phy 887 * 5. Link Status Interrupt 888 * 6. Disable Musb Clock 889 */ 890static irqreturn_t ab8500_usb_disconnect_irq(int irq, void *data) 891{ 892 struct ab8500_usb *ab = (struct ab8500_usb *) data; 893 enum usb_phy_events event = UX500_MUSB_NONE; 894 895 /* Link status will not be updated till phy is disabled. */ 896 if (ab->mode == USB_HOST) { 897 ab->phy.otg->default_a = false; 898 ab->vbus_draw = 0; 899 atomic_notifier_call_chain(&ab->phy.notifier, 900 event, &ab->vbus_draw); 901 ab8500_usb_host_phy_dis(ab); 902 ab->mode = USB_IDLE; 903 } 904 905 if (ab->mode == USB_PERIPHERAL) { 906 atomic_notifier_call_chain(&ab->phy.notifier, 907 event, &ab->vbus_draw); 908 ab8500_usb_peri_phy_dis(ab); 909 atomic_notifier_call_chain(&ab->phy.notifier, 910 UX500_MUSB_CLEAN, &ab->vbus_draw); 911 ab->mode = USB_IDLE; 912 ab->phy.otg->default_a = false; 913 ab->vbus_draw = 0; 914 } 915 916 if (is_ab8500_2p0(ab->ab8500)) { 917 if (ab->mode == USB_DEDICATED_CHG) { 918 ab8500_usb_wd_linkstatus(ab, 919 AB8500_BIT_PHY_CTRL_DEVICE_EN); 920 abx500_mask_and_set_register_interruptible(ab->dev, 921 AB8500_USB, AB8500_USB_PHY_CTRL_REG, 922 AB8500_BIT_PHY_CTRL_DEVICE_EN, 0); 923 } 924 } 925 926 return IRQ_HANDLED; 927} 928 929static irqreturn_t ab8500_usb_link_status_irq(int irq, void *data) 930{ 931 struct ab8500_usb *ab = (struct ab8500_usb *)data; 932 933 abx500_usb_link_status_update(ab); 934 935 return IRQ_HANDLED; 936} 937 938static void ab8500_usb_phy_disable_work(struct work_struct *work) 939{ 940 struct ab8500_usb *ab = container_of(work, struct ab8500_usb, 941 phy_dis_work); 942 943 if (!ab->phy.otg->host) 944 ab8500_usb_host_phy_dis(ab); 945 946 if (!ab->phy.otg->gadget) 947 ab8500_usb_peri_phy_dis(ab); 948} 949 950/* Check if VBUS is set and linkstatus has not detected a cable. */ 951static bool ab8500_usb_check_vbus_status(struct ab8500_usb *ab) 952{ 953 u8 isource2; 954 u8 reg; 955 enum ab8540_usb_link_status lsts; 956 957 abx500_get_register_interruptible(ab->dev, 958 AB8500_INTERRUPT, AB8500_IT_SOURCE2_REG, 959 &isource2); 960 961 /* If Vbus is below 3.6V abort */ 962 if (!(isource2 & AB8500_BIT_SOURCE2_VBUSDET)) 963 return false; 964 965 abx500_get_register_interruptible(ab->dev, 966 AB8500_USB, AB8540_USB_LINK_STAT_REG, 967 ®); 968 969 lsts = (reg >> 3) & 0xFF; 970 971 /* Check if linkstatus has detected a cable */ 972 if (lsts) 973 return false; 974 975 return true; 976} 977 978/* re-trigger charger detection again with watchdog re-kick. */ 979static void ab8500_usb_vbus_turn_on_event_work(struct work_struct *work) 980{ 981 struct ab8500_usb *ab = container_of(work, struct ab8500_usb, 982 vbus_event_work); 983 984 if (ab->mode != USB_IDLE) 985 return; 986 987 abx500_set_register_interruptible(ab->dev, 988 AB8500_SYS_CTRL2_BLOCK, AB8500_MAIN_WD_CTRL_REG, 989 AB8500_BIT_WD_CTRL_ENABLE); 990 991 udelay(100); 992 993 abx500_set_register_interruptible(ab->dev, 994 AB8500_SYS_CTRL2_BLOCK, AB8500_MAIN_WD_CTRL_REG, 995 AB8500_BIT_WD_CTRL_ENABLE | AB8500_BIT_WD_CTRL_KICK); 996 997 udelay(100); 998 999 /* Disable Main watchdog */ 1000 abx500_set_register_interruptible(ab->dev, 1001 AB8500_SYS_CTRL2_BLOCK, AB8500_MAIN_WD_CTRL_REG, 1002 0x0); 1003 1004 /* Enable USB Charger detection */ 1005 abx500_mask_and_set_register_interruptible(ab->dev, 1006 AB8500_USB, AB8540_VBUS_CTRL_REG, 1007 AB8540_BIT_VBUS_CTRL_CHARG_DET_ENA, 1008 AB8540_BIT_VBUS_CTRL_CHARG_DET_ENA); 1009 1010 ab->enabled_charging_detection = true; 1011} 1012 1013static unsigned ab8500_eyediagram_workaroud(struct ab8500_usb *ab, unsigned mA) 1014{ 1015 /* 1016 * AB8500 V2 has eye diagram issues when drawing more than 100mA from 1017 * VBUS. Set charging current to 100mA in case of standard host 1018 */ 1019 if (is_ab8500_2p0_or_earlier(ab->ab8500)) 1020 if (mA > 100) 1021 mA = 100; 1022 1023 return mA; 1024} 1025 1026static int ab8500_usb_set_power(struct usb_phy *phy, unsigned mA) 1027{ 1028 struct ab8500_usb *ab; 1029 1030 if (!phy) 1031 return -ENODEV; 1032 1033 ab = phy_to_ab(phy); 1034 1035 mA = ab8500_eyediagram_workaroud(ab, mA); 1036 1037 ab->vbus_draw = mA; 1038 1039 atomic_notifier_call_chain(&ab->phy.notifier, 1040 UX500_MUSB_VBUS, &ab->vbus_draw); 1041 1042 return 0; 1043} 1044 1045static int ab8500_usb_set_suspend(struct usb_phy *x, int suspend) 1046{ 1047 /* TODO */ 1048 return 0; 1049} 1050 1051static int ab8500_usb_set_peripheral(struct usb_otg *otg, 1052 struct usb_gadget *gadget) 1053{ 1054 struct ab8500_usb *ab; 1055 1056 if (!otg) 1057 return -ENODEV; 1058 1059 ab = phy_to_ab(otg->phy); 1060 1061 ab->phy.otg->gadget = gadget; 1062 1063 /* Some drivers call this function in atomic context. 1064 * Do not update ab8500 registers directly till this 1065 * is fixed. 1066 */ 1067 1068 if ((ab->mode != USB_IDLE) && !gadget) { 1069 ab->mode = USB_IDLE; 1070 schedule_work(&ab->phy_dis_work); 1071 } 1072 1073 return 0; 1074} 1075 1076static int ab8500_usb_set_host(struct usb_otg *otg, struct usb_bus *host) 1077{ 1078 struct ab8500_usb *ab; 1079 1080 if (!otg) 1081 return -ENODEV; 1082 1083 ab = phy_to_ab(otg->phy); 1084 1085 ab->phy.otg->host = host; 1086 1087 /* Some drivers call this function in atomic context. 1088 * Do not update ab8500 registers directly till this 1089 * is fixed. 1090 */ 1091 1092 if ((ab->mode != USB_IDLE) && !host) { 1093 ab->mode = USB_IDLE; 1094 schedule_work(&ab->phy_dis_work); 1095 } 1096 1097 return 0; 1098} 1099 1100static void ab8500_usb_restart_phy(struct ab8500_usb *ab) 1101{ 1102 abx500_mask_and_set_register_interruptible(ab->dev, 1103 AB8500_USB, AB8500_USB_PHY_CTRL_REG, 1104 AB8500_BIT_PHY_CTRL_DEVICE_EN, 1105 AB8500_BIT_PHY_CTRL_DEVICE_EN); 1106 1107 udelay(100); 1108 1109 abx500_mask_and_set_register_interruptible(ab->dev, 1110 AB8500_USB, AB8500_USB_PHY_CTRL_REG, 1111 AB8500_BIT_PHY_CTRL_DEVICE_EN, 1112 0); 1113 1114 abx500_mask_and_set_register_interruptible(ab->dev, 1115 AB8500_USB, AB8500_USB_PHY_CTRL_REG, 1116 AB8500_BIT_PHY_CTRL_HOST_EN, 1117 AB8500_BIT_PHY_CTRL_HOST_EN); 1118 1119 udelay(100); 1120 1121 abx500_mask_and_set_register_interruptible(ab->dev, 1122 AB8500_USB, AB8500_USB_PHY_CTRL_REG, 1123 AB8500_BIT_PHY_CTRL_HOST_EN, 1124 0); 1125} 1126 1127static int ab8500_usb_regulator_get(struct ab8500_usb *ab) 1128{ 1129 int err; 1130 1131 ab->v_ape = devm_regulator_get(ab->dev, "v-ape"); 1132 if (IS_ERR(ab->v_ape)) { 1133 dev_err(ab->dev, "Could not get v-ape supply\n"); 1134 err = PTR_ERR(ab->v_ape); 1135 return err; 1136 } 1137 1138 ab->v_ulpi = devm_regulator_get(ab->dev, "vddulpivio18"); 1139 if (IS_ERR(ab->v_ulpi)) { 1140 dev_err(ab->dev, "Could not get vddulpivio18 supply\n"); 1141 err = PTR_ERR(ab->v_ulpi); 1142 return err; 1143 } 1144 1145 ab->v_musb = devm_regulator_get(ab->dev, "musb_1v8"); 1146 if (IS_ERR(ab->v_musb)) { 1147 dev_err(ab->dev, "Could not get musb_1v8 supply\n"); 1148 err = PTR_ERR(ab->v_musb); 1149 return err; 1150 } 1151 1152 return 0; 1153} 1154 1155static int ab8500_usb_irq_setup(struct platform_device *pdev, 1156 struct ab8500_usb *ab) 1157{ 1158 int err; 1159 int irq; 1160 1161 if (ab->flags & AB8500_USB_FLAG_USE_LINK_STATUS_IRQ) { 1162 irq = platform_get_irq_byname(pdev, "USB_LINK_STATUS"); 1163 if (irq < 0) { 1164 dev_err(&pdev->dev, "Link status irq not found\n"); 1165 return irq; 1166 } 1167 err = devm_request_threaded_irq(&pdev->dev, irq, NULL, 1168 ab8500_usb_link_status_irq, 1169 IRQF_NO_SUSPEND | IRQF_SHARED, 1170 "usb-link-status", ab); 1171 if (err < 0) { 1172 dev_err(ab->dev, "request_irq failed for link status irq\n"); 1173 return err; 1174 } 1175 } 1176 1177 if (ab->flags & AB8500_USB_FLAG_USE_ID_WAKEUP_IRQ) { 1178 irq = platform_get_irq_byname(pdev, "ID_WAKEUP_F"); 1179 if (irq < 0) { 1180 dev_err(&pdev->dev, "ID fall irq not found\n"); 1181 return irq; 1182 } 1183 err = devm_request_threaded_irq(&pdev->dev, irq, NULL, 1184 ab8500_usb_disconnect_irq, 1185 IRQF_NO_SUSPEND | IRQF_SHARED, 1186 "usb-id-fall", ab); 1187 if (err < 0) { 1188 dev_err(ab->dev, "request_irq failed for ID fall irq\n"); 1189 return err; 1190 } 1191 } 1192 1193 if (ab->flags & AB8500_USB_FLAG_USE_VBUS_DET_IRQ) { 1194 irq = platform_get_irq_byname(pdev, "VBUS_DET_F"); 1195 if (irq < 0) { 1196 dev_err(&pdev->dev, "VBUS fall irq not found\n"); 1197 return irq; 1198 } 1199 err = devm_request_threaded_irq(&pdev->dev, irq, NULL, 1200 ab8500_usb_disconnect_irq, 1201 IRQF_NO_SUSPEND | IRQF_SHARED, 1202 "usb-vbus-fall", ab); 1203 if (err < 0) { 1204 dev_err(ab->dev, "request_irq failed for Vbus fall irq\n"); 1205 return err; 1206 } 1207 } 1208 1209 return 0; 1210} 1211 1212static void ab8500_usb_set_ab8500_tuning_values(struct ab8500_usb *ab) 1213{ 1214 int err; 1215 1216 /* Enable the PBT/Bank 0x12 access */ 1217 err = abx500_set_register_interruptible(ab->dev, 1218 AB8500_DEVELOPMENT, AB8500_BANK12_ACCESS, 0x01); 1219 if (err < 0) 1220 dev_err(ab->dev, "Failed to enable bank12 access err=%d\n", 1221 err); 1222 1223 err = abx500_set_register_interruptible(ab->dev, 1224 AB8500_DEBUG, AB8500_USB_PHY_TUNE1, 0xC8); 1225 if (err < 0) 1226 dev_err(ab->dev, "Failed to set PHY_TUNE1 register err=%d\n", 1227 err); 1228 1229 err = abx500_set_register_interruptible(ab->dev, 1230 AB8500_DEBUG, AB8500_USB_PHY_TUNE2, 0x00); 1231 if (err < 0) 1232 dev_err(ab->dev, "Failed to set PHY_TUNE2 register err=%d\n", 1233 err); 1234 1235 err = abx500_set_register_interruptible(ab->dev, 1236 AB8500_DEBUG, AB8500_USB_PHY_TUNE3, 0x78); 1237 if (err < 0) 1238 dev_err(ab->dev, "Failed to set PHY_TUNE3 regester err=%d\n", 1239 err); 1240 1241 /* Switch to normal mode/disable Bank 0x12 access */ 1242 err = abx500_set_register_interruptible(ab->dev, 1243 AB8500_DEVELOPMENT, AB8500_BANK12_ACCESS, 0x00); 1244 if (err < 0) 1245 dev_err(ab->dev, "Failed to switch bank12 access err=%d\n", 1246 err); 1247} 1248 1249static void ab8500_usb_set_ab8505_tuning_values(struct ab8500_usb *ab) 1250{ 1251 int err; 1252 1253 /* Enable the PBT/Bank 0x12 access */ 1254 err = abx500_mask_and_set_register_interruptible(ab->dev, 1255 AB8500_DEVELOPMENT, AB8500_BANK12_ACCESS, 1256 0x01, 0x01); 1257 if (err < 0) 1258 dev_err(ab->dev, "Failed to enable bank12 access err=%d\n", 1259 err); 1260 1261 err = abx500_mask_and_set_register_interruptible(ab->dev, 1262 AB8500_DEBUG, AB8500_USB_PHY_TUNE1, 1263 0xC8, 0xC8); 1264 if (err < 0) 1265 dev_err(ab->dev, "Failed to set PHY_TUNE1 register err=%d\n", 1266 err); 1267 1268 err = abx500_mask_and_set_register_interruptible(ab->dev, 1269 AB8500_DEBUG, AB8500_USB_PHY_TUNE2, 1270 0x60, 0x60); 1271 if (err < 0) 1272 dev_err(ab->dev, "Failed to set PHY_TUNE2 register err=%d\n", 1273 err); 1274 1275 err = abx500_mask_and_set_register_interruptible(ab->dev, 1276 AB8500_DEBUG, AB8500_USB_PHY_TUNE3, 1277 0xFC, 0x80); 1278 1279 if (err < 0) 1280 dev_err(ab->dev, "Failed to set PHY_TUNE3 regester err=%d\n", 1281 err); 1282 1283 /* Switch to normal mode/disable Bank 0x12 access */ 1284 err = abx500_mask_and_set_register_interruptible(ab->dev, 1285 AB8500_DEVELOPMENT, AB8500_BANK12_ACCESS, 1286 0x00, 0x00); 1287 if (err < 0) 1288 dev_err(ab->dev, "Failed to switch bank12 access err=%d\n", 1289 err); 1290} 1291 1292static void ab8500_usb_set_ab8540_tuning_values(struct ab8500_usb *ab) 1293{ 1294 int err; 1295 1296 err = abx500_set_register_interruptible(ab->dev, 1297 AB8540_DEBUG, AB8500_USB_PHY_TUNE1, 0xCC); 1298 if (err < 0) 1299 dev_err(ab->dev, "Failed to set PHY_TUNE1 register ret=%d\n", 1300 err); 1301 1302 err = abx500_set_register_interruptible(ab->dev, 1303 AB8540_DEBUG, AB8500_USB_PHY_TUNE2, 0x60); 1304 if (err < 0) 1305 dev_err(ab->dev, "Failed to set PHY_TUNE2 register ret=%d\n", 1306 err); 1307 1308 err = abx500_set_register_interruptible(ab->dev, 1309 AB8540_DEBUG, AB8500_USB_PHY_TUNE3, 0x90); 1310 if (err < 0) 1311 dev_err(ab->dev, "Failed to set PHY_TUNE3 regester ret=%d\n", 1312 err); 1313} 1314 1315static void ab8500_usb_set_ab9540_tuning_values(struct ab8500_usb *ab) 1316{ 1317 int err; 1318 1319 /* Enable the PBT/Bank 0x12 access */ 1320 err = abx500_set_register_interruptible(ab->dev, 1321 AB8500_DEVELOPMENT, AB8500_BANK12_ACCESS, 0x01); 1322 if (err < 0) 1323 dev_err(ab->dev, "Failed to enable bank12 access err=%d\n", 1324 err); 1325 1326 err = abx500_set_register_interruptible(ab->dev, 1327 AB8500_DEBUG, AB8500_USB_PHY_TUNE1, 0xC8); 1328 if (err < 0) 1329 dev_err(ab->dev, "Failed to set PHY_TUNE1 register err=%d\n", 1330 err); 1331 1332 err = abx500_set_register_interruptible(ab->dev, 1333 AB8500_DEBUG, AB8500_USB_PHY_TUNE2, 0x60); 1334 if (err < 0) 1335 dev_err(ab->dev, "Failed to set PHY_TUNE2 register err=%d\n", 1336 err); 1337 1338 err = abx500_set_register_interruptible(ab->dev, 1339 AB8500_DEBUG, AB8500_USB_PHY_TUNE3, 0x80); 1340 if (err < 0) 1341 dev_err(ab->dev, "Failed to set PHY_TUNE3 regester err=%d\n", 1342 err); 1343 1344 /* Switch to normal mode/disable Bank 0x12 access */ 1345 err = abx500_set_register_interruptible(ab->dev, 1346 AB8500_DEVELOPMENT, AB8500_BANK12_ACCESS, 0x00); 1347 if (err < 0) 1348 dev_err(ab->dev, "Failed to switch bank12 access err=%d\n", 1349 err); 1350} 1351 1352static int ab8500_usb_probe(struct platform_device *pdev) 1353{ 1354 struct ab8500_usb *ab; 1355 struct ab8500 *ab8500; 1356 struct usb_otg *otg; 1357 int err; 1358 int rev; 1359 1360 ab8500 = dev_get_drvdata(pdev->dev.parent); 1361 rev = abx500_get_chip_id(&pdev->dev); 1362 1363 if (is_ab8500_1p1_or_earlier(ab8500)) { 1364 dev_err(&pdev->dev, "Unsupported AB8500 chip rev=%d\n", rev); 1365 return -ENODEV; 1366 } 1367 1368 ab = devm_kzalloc(&pdev->dev, sizeof(*ab), GFP_KERNEL); 1369 if (!ab) 1370 return -ENOMEM; 1371 1372 otg = devm_kzalloc(&pdev->dev, sizeof(*otg), GFP_KERNEL); 1373 if (!otg) 1374 return -ENOMEM; 1375 1376 ab->dev = &pdev->dev; 1377 ab->ab8500 = ab8500; 1378 ab->phy.dev = ab->dev; 1379 ab->phy.otg = otg; 1380 ab->phy.label = "ab8500"; 1381 ab->phy.set_suspend = ab8500_usb_set_suspend; 1382 ab->phy.set_power = ab8500_usb_set_power; 1383 ab->phy.state = OTG_STATE_UNDEFINED; 1384 1385 otg->phy = &ab->phy; 1386 otg->set_host = ab8500_usb_set_host; 1387 otg->set_peripheral = ab8500_usb_set_peripheral; 1388 1389 if (is_ab8500(ab->ab8500)) { 1390 ab->flags |= AB8500_USB_FLAG_USE_LINK_STATUS_IRQ | 1391 AB8500_USB_FLAG_USE_ID_WAKEUP_IRQ | 1392 AB8500_USB_FLAG_USE_VBUS_DET_IRQ | 1393 AB8500_USB_FLAG_REGULATOR_SET_VOLTAGE; 1394 } else if (is_ab8505(ab->ab8500)) { 1395 ab->flags |= AB8500_USB_FLAG_USE_LINK_STATUS_IRQ | 1396 AB8500_USB_FLAG_USE_ID_WAKEUP_IRQ | 1397 AB8500_USB_FLAG_USE_VBUS_DET_IRQ | 1398 AB8500_USB_FLAG_REGULATOR_SET_VOLTAGE; 1399 } else if (is_ab8540(ab->ab8500)) { 1400 ab->flags |= AB8500_USB_FLAG_USE_LINK_STATUS_IRQ | 1401 AB8500_USB_FLAG_USE_CHECK_VBUS_STATUS | 1402 AB8500_USB_FLAG_USE_VBUS_HOST_QUIRK | 1403 AB8500_USB_FLAG_REGULATOR_SET_VOLTAGE; 1404 } else if (is_ab9540(ab->ab8500)) { 1405 ab->flags |= AB8500_USB_FLAG_USE_LINK_STATUS_IRQ | 1406 AB8500_USB_FLAG_REGULATOR_SET_VOLTAGE; 1407 if (is_ab9540_2p0_or_earlier(ab->ab8500)) 1408 ab->flags |= AB8500_USB_FLAG_USE_ID_WAKEUP_IRQ | 1409 AB8500_USB_FLAG_USE_VBUS_DET_IRQ; 1410 } 1411 1412 /* Disable regulator voltage setting for AB8500 <= v2.0 */ 1413 if (is_ab8500_2p0_or_earlier(ab->ab8500)) 1414 ab->flags &= ~AB8500_USB_FLAG_REGULATOR_SET_VOLTAGE; 1415 1416 platform_set_drvdata(pdev, ab); 1417 1418 /* all: Disable phy when called from set_host and set_peripheral */ 1419 INIT_WORK(&ab->phy_dis_work, ab8500_usb_phy_disable_work); 1420 1421 INIT_WORK(&ab->vbus_event_work, ab8500_usb_vbus_turn_on_event_work); 1422 1423 err = ab8500_usb_regulator_get(ab); 1424 if (err) 1425 return err; 1426 1427 ab->sysclk = devm_clk_get(ab->dev, "sysclk"); 1428 if (IS_ERR(ab->sysclk)) { 1429 dev_err(ab->dev, "Could not get sysclk.\n"); 1430 return PTR_ERR(ab->sysclk); 1431 } 1432 1433 err = ab8500_usb_irq_setup(pdev, ab); 1434 if (err < 0) 1435 return err; 1436 1437 err = usb_add_phy(&ab->phy, USB_PHY_TYPE_USB2); 1438 if (err) { 1439 dev_err(&pdev->dev, "Can't register transceiver\n"); 1440 return err; 1441 } 1442 1443 if (is_ab8500(ab->ab8500) && !is_ab8500_2p0_or_earlier(ab->ab8500)) 1444 /* Phy tuning values for AB8500 > v2.0 */ 1445 ab8500_usb_set_ab8500_tuning_values(ab); 1446 else if (is_ab8505(ab->ab8500)) 1447 /* Phy tuning values for AB8505 */ 1448 ab8500_usb_set_ab8505_tuning_values(ab); 1449 else if (is_ab8540(ab->ab8500)) 1450 /* Phy tuning values for AB8540 */ 1451 ab8500_usb_set_ab8540_tuning_values(ab); 1452 else if (is_ab9540(ab->ab8500)) 1453 /* Phy tuning values for AB9540 */ 1454 ab8500_usb_set_ab9540_tuning_values(ab); 1455 1456 /* Needed to enable ID detection. */ 1457 ab8500_usb_wd_workaround(ab); 1458 1459 /* 1460 * This is required for usb-link-status to work properly when a 1461 * cable is connected at boot time. 1462 */ 1463 ab8500_usb_restart_phy(ab); 1464 1465 if (ab->flags & AB8500_USB_FLAG_USE_CHECK_VBUS_STATUS) { 1466 if (ab8500_usb_check_vbus_status(ab)) 1467 schedule_work(&ab->vbus_event_work); 1468 } 1469 1470 abx500_usb_link_status_update(ab); 1471 1472 dev_info(&pdev->dev, "revision 0x%2x driver initialized\n", rev); 1473 1474 return 0; 1475} 1476 1477static int ab8500_usb_remove(struct platform_device *pdev) 1478{ 1479 struct ab8500_usb *ab = platform_get_drvdata(pdev); 1480 1481 cancel_work_sync(&ab->phy_dis_work); 1482 cancel_work_sync(&ab->vbus_event_work); 1483 1484 usb_remove_phy(&ab->phy); 1485 1486 if (ab->mode == USB_HOST) 1487 ab8500_usb_host_phy_dis(ab); 1488 else if (ab->mode == USB_PERIPHERAL) 1489 ab8500_usb_peri_phy_dis(ab); 1490 1491 return 0; 1492} 1493 1494static struct platform_device_id ab8500_usb_devtype[] = { 1495 { .name = "ab8500-usb", }, 1496 { .name = "ab8540-usb", }, 1497 { .name = "ab9540-usb", }, 1498 { /* sentinel */ } 1499}; 1500MODULE_DEVICE_TABLE(platform, ab8500_usb_devtype); 1501 1502static struct platform_driver ab8500_usb_driver = { 1503 .probe = ab8500_usb_probe, 1504 .remove = ab8500_usb_remove, 1505 .id_table = ab8500_usb_devtype, 1506 .driver = { 1507 .name = "abx5x0-usb", 1508 .owner = THIS_MODULE, 1509 }, 1510}; 1511 1512static int __init ab8500_usb_init(void) 1513{ 1514 return platform_driver_register(&ab8500_usb_driver); 1515} 1516subsys_initcall(ab8500_usb_init); 1517 1518static void __exit ab8500_usb_exit(void) 1519{ 1520 platform_driver_unregister(&ab8500_usb_driver); 1521} 1522module_exit(ab8500_usb_exit); 1523 1524MODULE_AUTHOR("ST-Ericsson AB"); 1525MODULE_DESCRIPTION("AB8500 family usb transceiver driver"); 1526MODULE_LICENSE("GPL"); 1527