1 /* 2 * Copyright (c) 2011 The Chromium OS Authors. 3 * Copyright (c) 2009-2013 NVIDIA Corporation 4 * Copyright (c) 2013 Lucas Stach 5 * 6 * SPDX-License-Identifier: GPL-2.0+ 7 */ 8 9 #include <common.h> 10 #include <asm/errno.h> 11 #include <asm/io.h> 12 #include <asm-generic/gpio.h> 13 #include <asm/arch/clock.h> 14 #include <asm/arch-tegra/usb.h> 15 #include <asm/arch-tegra/clk_rst.h> 16 #include <usb.h> 17 #include <usb/ulpi.h> 18 #include <libfdt.h> 19 #include <fdtdec.h> 20 21 #include "ehci.h" 22 23 #define USB1_ADDR_MASK 0xFFFF0000 24 25 #define HOSTPC1_DEVLC 0x84 26 #define HOSTPC1_PSPD(x) (((x) >> 25) & 0x3) 27 28 #ifdef CONFIG_USB_ULPI 29 #ifndef CONFIG_USB_ULPI_VIEWPORT 30 #error "To use CONFIG_USB_ULPI on Tegra Boards you have to also \ 31 define CONFIG_USB_ULPI_VIEWPORT" 32 #endif 33 #endif 34 35 enum { 36 USB_PORTS_MAX = 3, /* Maximum ports we allow */ 37 }; 38 39 /* Parameters we need for USB */ 40 enum { 41 PARAM_DIVN, /* PLL FEEDBACK DIVIDer */ 42 PARAM_DIVM, /* PLL INPUT DIVIDER */ 43 PARAM_DIVP, /* POST DIVIDER (2^N) */ 44 PARAM_CPCON, /* BASE PLLC CHARGE Pump setup ctrl */ 45 PARAM_LFCON, /* BASE PLLC LOOP FILter setup ctrl */ 46 PARAM_ENABLE_DELAY_COUNT, /* PLL-U Enable Delay Count */ 47 PARAM_STABLE_COUNT, /* PLL-U STABLE count */ 48 PARAM_ACTIVE_DELAY_COUNT, /* PLL-U Active delay count */ 49 PARAM_XTAL_FREQ_COUNT, /* PLL-U XTAL frequency count */ 50 PARAM_DEBOUNCE_A_TIME, /* 10MS DELAY for BIAS_DEBOUNCE_A */ 51 PARAM_BIAS_TIME, /* 20US DELAY AFter bias cell op */ 52 53 PARAM_COUNT 54 }; 55 56 /* Possible port types (dual role mode) */ 57 enum dr_mode { 58 DR_MODE_NONE = 0, 59 DR_MODE_HOST, /* supports host operation */ 60 DR_MODE_DEVICE, /* supports device operation */ 61 DR_MODE_OTG, /* supports both */ 62 }; 63 64 /* Information about a USB port */ 65 struct fdt_usb { 66 struct usb_ctlr *reg; /* address of registers in physical memory */ 67 unsigned utmi:1; /* 1 if port has external tranceiver, else 0 */ 68 unsigned ulpi:1; /* 1 if port has external ULPI transceiver */ 69 unsigned enabled:1; /* 1 to enable, 0 to disable */ 70 unsigned has_legacy_mode:1; /* 1 if this port has legacy mode */ 71 unsigned initialized:1; /* has this port already been initialized? */ 72 enum usb_init_type init_type; 73 enum dr_mode dr_mode; /* dual role mode */ 74 enum periph_id periph_id;/* peripheral id */ 75 struct fdt_gpio_state vbus_gpio; /* GPIO for vbus enable */ 76 struct fdt_gpio_state phy_reset_gpio; /* GPIO to reset ULPI phy */ 77 }; 78 79 static struct fdt_usb port[USB_PORTS_MAX]; /* List of valid USB ports */ 80 static unsigned port_count; /* Number of available ports */ 81 /* Port that needs to clear CSC after Port Reset */ 82 static u32 port_addr_clear_csc; 83 84 /* 85 * This table has USB timing parameters for each Oscillator frequency we 86 * support. There are four sets of values: 87 * 88 * 1. PLLU configuration information (reference clock is osc/clk_m and 89 * PLLU-FOs are fixed at 12MHz/60MHz/480MHz). 90 * 91 * Reference frequency 13.0MHz 19.2MHz 12.0MHz 26.0MHz 92 * ---------------------------------------------------------------------- 93 * DIVN 960 (0x3c0) 200 (0c8) 960 (3c0h) 960 (3c0) 94 * DIVM 13 (0d) 4 (04) 12 (0c) 26 (1a) 95 * Filter frequency (MHz) 1 4.8 6 2 96 * CPCON 1100b 0011b 1100b 1100b 97 * LFCON0 0 0 0 0 98 * 99 * 2. PLL CONFIGURATION & PARAMETERS for different clock generators: 100 * 101 * Reference frequency 13.0MHz 19.2MHz 12.0MHz 26.0MHz 102 * --------------------------------------------------------------------------- 103 * PLLU_ENABLE_DLY_COUNT 02 (0x02) 03 (03) 02 (02) 04 (04) 104 * PLLU_STABLE_COUNT 51 (33) 75 (4B) 47 (2F) 102 (66) 105 * PLL_ACTIVE_DLY_COUNT 05 (05) 06 (06) 04 (04) 09 (09) 106 * XTAL_FREQ_COUNT 127 (7F) 187 (BB) 118 (76) 254 (FE) 107 * 108 * 3. Debounce values IdDig, Avalid, Bvalid, VbusValid, VbusWakeUp, and 109 * SessEnd. Each of these signals have their own debouncer and for each of 110 * those one out of two debouncing times can be chosen (BIAS_DEBOUNCE_A or 111 * BIAS_DEBOUNCE_B). 112 * 113 * The values of DEBOUNCE_A and DEBOUNCE_B are calculated as follows: 114 * 0xffff -> No debouncing at all 115 * <n> ms = <n> *1000 / (1/19.2MHz) / 4 116 * 117 * So to program a 1 ms debounce for BIAS_DEBOUNCE_A, we have: 118 * BIAS_DEBOUNCE_A[15:0] = 1000 * 19.2 / 4 = 4800 = 0x12c0 119 * 120 * We need to use only DebounceA for BOOTROM. We don't need the DebounceB 121 * values, so we can keep those to default. 122 * 123 * 4. The 20 microsecond delay after bias cell operation. 124 */ 125 static const unsigned T20_usb_pll[CLOCK_OSC_FREQ_COUNT][PARAM_COUNT] = { 126 /* DivN, DivM, DivP, CPCON, LFCON, Delays Debounce, Bias */ 127 { 0x3C0, 0x0D, 0x00, 0xC, 0, 0x02, 0x33, 0x05, 0x7F, 0x7EF4, 5 }, 128 { 0x0C8, 0x04, 0x00, 0x3, 0, 0x03, 0x4B, 0x06, 0xBB, 0xBB80, 7 }, 129 { 0x3C0, 0x0C, 0x00, 0xC, 0, 0x02, 0x2F, 0x04, 0x76, 0x7530, 5 }, 130 { 0x3C0, 0x1A, 0x00, 0xC, 0, 0x04, 0x66, 0x09, 0xFE, 0xFDE8, 9 } 131 }; 132 133 static const unsigned T30_usb_pll[CLOCK_OSC_FREQ_COUNT][PARAM_COUNT] = { 134 /* DivN, DivM, DivP, CPCON, LFCON, Delays Debounce, Bias */ 135 { 0x3C0, 0x0D, 0x00, 0xC, 1, 0x02, 0x33, 0x09, 0x7F, 0x7EF4, 5 }, 136 { 0x0C8, 0x04, 0x00, 0x3, 0, 0x03, 0x4B, 0x0C, 0xBB, 0xBB80, 7 }, 137 { 0x3C0, 0x0C, 0x00, 0xC, 1, 0x02, 0x2F, 0x08, 0x76, 0x7530, 5 }, 138 { 0x3C0, 0x1A, 0x00, 0xC, 1, 0x04, 0x66, 0x09, 0xFE, 0xFDE8, 9 } 139 }; 140 141 static const unsigned T114_usb_pll[CLOCK_OSC_FREQ_COUNT][PARAM_COUNT] = { 142 /* DivN, DivM, DivP, CPCON, LFCON, Delays Debounce, Bias */ 143 { 0x3C0, 0x0D, 0x00, 0xC, 2, 0x02, 0x33, 0x09, 0x7F, 0x7EF4, 6 }, 144 { 0x0C8, 0x04, 0x00, 0x3, 2, 0x03, 0x4B, 0x0C, 0xBB, 0xBB80, 8 }, 145 { 0x3C0, 0x0C, 0x00, 0xC, 2, 0x02, 0x2F, 0x08, 0x76, 0x7530, 5 }, 146 { 0x3C0, 0x1A, 0x00, 0xC, 2, 0x04, 0x66, 0x09, 0xFE, 0xFDE8, 0xB } 147 }; 148 149 /* UTMIP Idle Wait Delay */ 150 static const u8 utmip_idle_wait_delay = 17; 151 152 /* UTMIP Elastic limit */ 153 static const u8 utmip_elastic_limit = 16; 154 155 /* UTMIP High Speed Sync Start Delay */ 156 static const u8 utmip_hs_sync_start_delay = 9; 157 158 struct fdt_usb_controller { 159 int compat; 160 /* flag to determine whether controller supports hostpc register */ 161 u32 has_hostpc:1; 162 const unsigned *pll_parameter; 163 }; 164 165 static struct fdt_usb_controller fdt_usb_controllers[] = { 166 { 167 .compat = COMPAT_NVIDIA_TEGRA20_USB, 168 .has_hostpc = 0, 169 .pll_parameter = (const unsigned *)T20_usb_pll, 170 }, 171 { 172 .compat = COMPAT_NVIDIA_TEGRA30_USB, 173 .has_hostpc = 1, 174 .pll_parameter = (const unsigned *)T30_usb_pll, 175 }, 176 { 177 .compat = COMPAT_NVIDIA_TEGRA114_USB, 178 .has_hostpc = 1, 179 .pll_parameter = (const unsigned *)T114_usb_pll, 180 }, 181 }; 182 183 static struct fdt_usb_controller *controller; 184 185 /* 186 * A known hardware issue where Connect Status Change bit of PORTSC register 187 * of USB1 controller will be set after Port Reset. 188 * We have to clear it in order for later device enumeration to proceed. 189 * This ehci_powerup_fixup overrides the weak function ehci_powerup_fixup 190 * in "ehci-hcd.c". 191 */ 192 void ehci_powerup_fixup(uint32_t *status_reg, uint32_t *reg) 193 { 194 mdelay(50); 195 /* This is to avoid PORT_ENABLE bit to be cleared in "ehci-hcd.c". */ 196 if (controller->has_hostpc) 197 *reg |= EHCI_PS_PE; 198 199 if (((u32)status_reg & TEGRA_USB_ADDR_MASK) != port_addr_clear_csc) 200 return; 201 /* For EHCI_PS_CSC to be cleared in ehci_hcd.c */ 202 if (ehci_readl(status_reg) & EHCI_PS_CSC) 203 *reg |= EHCI_PS_CSC; 204 } 205 206 /* 207 * This ehci_set_usbmode overrides the weak function ehci_set_usbmode 208 * in "ehci-hcd.c". 209 */ 210 void ehci_set_usbmode(int index) 211 { 212 struct fdt_usb *config; 213 struct usb_ctlr *usbctlr; 214 uint32_t tmp; 215 216 config = &port[index]; 217 usbctlr = config->reg; 218 219 tmp = ehci_readl(&usbctlr->usb_mode); 220 tmp |= USBMODE_CM_HC; 221 ehci_writel(&usbctlr->usb_mode, tmp); 222 } 223 224 /* 225 * This ehci_get_port_speed overrides the weak function ehci_get_port_speed 226 * in "ehci-hcd.c". 227 */ 228 int ehci_get_port_speed(struct ehci_hcor *hcor, uint32_t reg) 229 { 230 uint32_t tmp; 231 uint32_t *reg_ptr; 232 233 if (controller->has_hostpc) { 234 reg_ptr = (uint32_t *)((u8 *)&hcor->or_usbcmd + HOSTPC1_DEVLC); 235 tmp = ehci_readl(reg_ptr); 236 return HOSTPC1_PSPD(tmp); 237 } else 238 return PORTSC_PSPD(reg); 239 } 240 241 /* Set up VBUS for host/device mode */ 242 static void set_up_vbus(struct fdt_usb *config, enum usb_init_type init) 243 { 244 /* 245 * If we are an OTG port initializing in host mode, 246 * check if remote host is driving VBus and bail out in this case. 247 */ 248 if (init == USB_INIT_HOST && 249 config->dr_mode == DR_MODE_OTG && 250 (readl(&config->reg->phy_vbus_sensors) & VBUS_VLD_STS)) { 251 printf("tegrausb: VBUS input active; not enabling as host\n"); 252 return; 253 } 254 255 if (fdt_gpio_isvalid(&config->vbus_gpio)) { 256 int vbus_value; 257 258 fdtdec_setup_gpio(&config->vbus_gpio); 259 260 vbus_value = (init == USB_INIT_HOST) ^ 261 !!(config->vbus_gpio.flags & FDT_GPIO_ACTIVE_LOW); 262 gpio_direction_output(config->vbus_gpio.gpio, vbus_value); 263 264 debug("set_up_vbus: GPIO %d %d\n", config->vbus_gpio.gpio, 265 vbus_value); 266 } 267 } 268 269 void usbf_reset_controller(struct fdt_usb *config, struct usb_ctlr *usbctlr) 270 { 271 /* Reset the USB controller with 2us delay */ 272 reset_periph(config->periph_id, 2); 273 274 /* 275 * Set USB1_NO_LEGACY_MODE to 1, Registers are accessible under 276 * base address 277 */ 278 if (config->has_legacy_mode) 279 setbits_le32(&usbctlr->usb1_legacy_ctrl, USB1_NO_LEGACY_MODE); 280 281 /* Put UTMIP1/3 in reset */ 282 setbits_le32(&usbctlr->susp_ctrl, UTMIP_RESET); 283 284 /* Enable the UTMIP PHY */ 285 if (config->utmi) 286 setbits_le32(&usbctlr->susp_ctrl, UTMIP_PHY_ENB); 287 } 288 289 static const unsigned *get_pll_timing(void) 290 { 291 const unsigned *timing; 292 293 timing = controller->pll_parameter + 294 clock_get_osc_freq() * PARAM_COUNT; 295 296 return timing; 297 } 298 299 /* select the PHY to use with a USB controller */ 300 static void init_phy_mux(struct fdt_usb *config, uint pts, 301 enum usb_init_type init) 302 { 303 struct usb_ctlr *usbctlr = config->reg; 304 305 #if defined(CONFIG_TEGRA20) 306 if (config->periph_id == PERIPH_ID_USBD) { 307 clrsetbits_le32(&usbctlr->port_sc1, PTS1_MASK, 308 pts << PTS1_SHIFT); 309 clrbits_le32(&usbctlr->port_sc1, STS1); 310 } else { 311 clrsetbits_le32(&usbctlr->port_sc1, PTS_MASK, 312 pts << PTS_SHIFT); 313 clrbits_le32(&usbctlr->port_sc1, STS); 314 } 315 #else 316 /* Set to Host mode (if applicable) after Controller Reset was done */ 317 clrsetbits_le32(&usbctlr->usb_mode, USBMODE_CM_HC, 318 (init == USB_INIT_HOST) ? USBMODE_CM_HC : 0); 319 /* 320 * Select PHY interface after setting host mode. 321 * For device mode, the ordering requirement is not an issue, since 322 * only the first USB controller supports device mode, and that USB 323 * controller can only talk to a UTMI PHY, so the PHY selection is 324 * already made at reset time, so this write is a no-op. 325 */ 326 clrsetbits_le32(&usbctlr->hostpc1_devlc, PTS_MASK, 327 pts << PTS_SHIFT); 328 clrbits_le32(&usbctlr->hostpc1_devlc, STS); 329 #endif 330 } 331 332 /* set up the UTMI USB controller with the parameters provided */ 333 static int init_utmi_usb_controller(struct fdt_usb *config, 334 enum usb_init_type init) 335 { 336 u32 b_sess_valid_mask, val; 337 int loop_count; 338 const unsigned *timing; 339 struct usb_ctlr *usbctlr = config->reg; 340 struct clk_rst_ctlr *clkrst; 341 struct usb_ctlr *usb1ctlr; 342 343 clock_enable(config->periph_id); 344 345 /* Reset the usb controller */ 346 usbf_reset_controller(config, usbctlr); 347 348 /* Stop crystal clock by setting UTMIP_PHY_XTAL_CLOCKEN low */ 349 clrbits_le32(&usbctlr->utmip_misc_cfg1, UTMIP_PHY_XTAL_CLOCKEN); 350 351 /* Follow the crystal clock disable by >100ns delay */ 352 udelay(1); 353 354 b_sess_valid_mask = (VBUS_B_SESS_VLD_SW_VALUE | VBUS_B_SESS_VLD_SW_EN); 355 clrsetbits_le32(&usbctlr->phy_vbus_sensors, b_sess_valid_mask, 356 (init == USB_INIT_DEVICE) ? b_sess_valid_mask : 0); 357 358 /* 359 * To Use the A Session Valid for cable detection logic, VBUS_WAKEUP 360 * mux must be switched to actually use a_sess_vld threshold. 361 */ 362 if (config->dr_mode == DR_MODE_OTG && 363 fdt_gpio_isvalid(&config->vbus_gpio)) 364 clrsetbits_le32(&usbctlr->usb1_legacy_ctrl, 365 VBUS_SENSE_CTL_MASK, 366 VBUS_SENSE_CTL_A_SESS_VLD << VBUS_SENSE_CTL_SHIFT); 367 368 /* 369 * PLL Delay CONFIGURATION settings. The following parameters control 370 * the bring up of the plls. 371 */ 372 timing = get_pll_timing(); 373 374 if (!controller->has_hostpc) { 375 val = readl(&usbctlr->utmip_misc_cfg1); 376 clrsetbits_le32(&val, UTMIP_PLLU_STABLE_COUNT_MASK, 377 timing[PARAM_STABLE_COUNT] << 378 UTMIP_PLLU_STABLE_COUNT_SHIFT); 379 clrsetbits_le32(&val, UTMIP_PLL_ACTIVE_DLY_COUNT_MASK, 380 timing[PARAM_ACTIVE_DELAY_COUNT] << 381 UTMIP_PLL_ACTIVE_DLY_COUNT_SHIFT); 382 writel(val, &usbctlr->utmip_misc_cfg1); 383 384 /* Set PLL enable delay count and crystal frequency count */ 385 val = readl(&usbctlr->utmip_pll_cfg1); 386 clrsetbits_le32(&val, UTMIP_PLLU_ENABLE_DLY_COUNT_MASK, 387 timing[PARAM_ENABLE_DELAY_COUNT] << 388 UTMIP_PLLU_ENABLE_DLY_COUNT_SHIFT); 389 clrsetbits_le32(&val, UTMIP_XTAL_FREQ_COUNT_MASK, 390 timing[PARAM_XTAL_FREQ_COUNT] << 391 UTMIP_XTAL_FREQ_COUNT_SHIFT); 392 writel(val, &usbctlr->utmip_pll_cfg1); 393 } else { 394 clkrst = (struct clk_rst_ctlr *)NV_PA_CLK_RST_BASE; 395 396 val = readl(&clkrst->crc_utmip_pll_cfg2); 397 clrsetbits_le32(&val, UTMIP_PLLU_STABLE_COUNT_MASK, 398 timing[PARAM_STABLE_COUNT] << 399 UTMIP_PLLU_STABLE_COUNT_SHIFT); 400 clrsetbits_le32(&val, UTMIP_PLL_ACTIVE_DLY_COUNT_MASK, 401 timing[PARAM_ACTIVE_DELAY_COUNT] << 402 UTMIP_PLL_ACTIVE_DLY_COUNT_SHIFT); 403 writel(val, &clkrst->crc_utmip_pll_cfg2); 404 405 /* Set PLL enable delay count and crystal frequency count */ 406 val = readl(&clkrst->crc_utmip_pll_cfg1); 407 clrsetbits_le32(&val, UTMIP_PLLU_ENABLE_DLY_COUNT_MASK, 408 timing[PARAM_ENABLE_DELAY_COUNT] << 409 UTMIP_PLLU_ENABLE_DLY_COUNT_SHIFT); 410 clrsetbits_le32(&val, UTMIP_XTAL_FREQ_COUNT_MASK, 411 timing[PARAM_XTAL_FREQ_COUNT] << 412 UTMIP_XTAL_FREQ_COUNT_SHIFT); 413 writel(val, &clkrst->crc_utmip_pll_cfg1); 414 415 /* Disable Power Down state for PLL */ 416 clrbits_le32(&clkrst->crc_utmip_pll_cfg1, 417 PLLU_POWERDOWN | PLL_ENABLE_POWERDOWN | 418 PLL_ACTIVE_POWERDOWN); 419 420 /* Recommended PHY settings for EYE diagram */ 421 val = readl(&usbctlr->utmip_xcvr_cfg0); 422 clrsetbits_le32(&val, UTMIP_XCVR_SETUP_MASK, 423 0x4 << UTMIP_XCVR_SETUP_SHIFT); 424 clrsetbits_le32(&val, UTMIP_XCVR_SETUP_MSB_MASK, 425 0x3 << UTMIP_XCVR_SETUP_MSB_SHIFT); 426 clrsetbits_le32(&val, UTMIP_XCVR_HSSLEW_MSB_MASK, 427 0x8 << UTMIP_XCVR_HSSLEW_MSB_SHIFT); 428 writel(val, &usbctlr->utmip_xcvr_cfg0); 429 clrsetbits_le32(&usbctlr->utmip_xcvr_cfg1, 430 UTMIP_XCVR_TERM_RANGE_ADJ_MASK, 431 0x7 << UTMIP_XCVR_TERM_RANGE_ADJ_SHIFT); 432 433 /* Some registers can be controlled from USB1 only. */ 434 if (config->periph_id != PERIPH_ID_USBD) { 435 clock_enable(PERIPH_ID_USBD); 436 /* Disable Reset if in Reset state */ 437 reset_set_enable(PERIPH_ID_USBD, 0); 438 } 439 usb1ctlr = (struct usb_ctlr *) 440 ((u32)config->reg & USB1_ADDR_MASK); 441 val = readl(&usb1ctlr->utmip_bias_cfg0); 442 setbits_le32(&val, UTMIP_HSDISCON_LEVEL_MSB); 443 clrsetbits_le32(&val, UTMIP_HSDISCON_LEVEL_MASK, 444 0x1 << UTMIP_HSDISCON_LEVEL_SHIFT); 445 clrsetbits_le32(&val, UTMIP_HSSQUELCH_LEVEL_MASK, 446 0x2 << UTMIP_HSSQUELCH_LEVEL_SHIFT); 447 writel(val, &usb1ctlr->utmip_bias_cfg0); 448 449 /* Miscellaneous setting mentioned in Programming Guide */ 450 clrbits_le32(&usbctlr->utmip_misc_cfg0, 451 UTMIP_SUSPEND_EXIT_ON_EDGE); 452 } 453 454 /* Setting the tracking length time */ 455 clrsetbits_le32(&usbctlr->utmip_bias_cfg1, 456 UTMIP_BIAS_PDTRK_COUNT_MASK, 457 timing[PARAM_BIAS_TIME] << UTMIP_BIAS_PDTRK_COUNT_SHIFT); 458 459 /* Program debounce time for VBUS to become valid */ 460 clrsetbits_le32(&usbctlr->utmip_debounce_cfg0, 461 UTMIP_DEBOUNCE_CFG0_MASK, 462 timing[PARAM_DEBOUNCE_A_TIME] << UTMIP_DEBOUNCE_CFG0_SHIFT); 463 464 setbits_le32(&usbctlr->utmip_tx_cfg0, UTMIP_FS_PREAMBLE_J); 465 466 /* Disable battery charge enabling bit */ 467 setbits_le32(&usbctlr->utmip_bat_chrg_cfg0, UTMIP_PD_CHRG); 468 469 clrbits_le32(&usbctlr->utmip_xcvr_cfg0, UTMIP_XCVR_LSBIAS_SE); 470 setbits_le32(&usbctlr->utmip_spare_cfg0, FUSE_SETUP_SEL); 471 472 /* 473 * Configure the UTMIP_IDLE_WAIT and UTMIP_ELASTIC_LIMIT 474 * Setting these fields, together with default values of the 475 * other fields, results in programming the registers below as 476 * follows: 477 * UTMIP_HSRX_CFG0 = 0x9168c000 478 * UTMIP_HSRX_CFG1 = 0x13 479 */ 480 481 /* Set PLL enable delay count and Crystal frequency count */ 482 val = readl(&usbctlr->utmip_hsrx_cfg0); 483 clrsetbits_le32(&val, UTMIP_IDLE_WAIT_MASK, 484 utmip_idle_wait_delay << UTMIP_IDLE_WAIT_SHIFT); 485 clrsetbits_le32(&val, UTMIP_ELASTIC_LIMIT_MASK, 486 utmip_elastic_limit << UTMIP_ELASTIC_LIMIT_SHIFT); 487 writel(val, &usbctlr->utmip_hsrx_cfg0); 488 489 /* Configure the UTMIP_HS_SYNC_START_DLY */ 490 clrsetbits_le32(&usbctlr->utmip_hsrx_cfg1, 491 UTMIP_HS_SYNC_START_DLY_MASK, 492 utmip_hs_sync_start_delay << UTMIP_HS_SYNC_START_DLY_SHIFT); 493 494 /* Preceed the crystal clock disable by >100ns delay. */ 495 udelay(1); 496 497 /* Resuscitate crystal clock by setting UTMIP_PHY_XTAL_CLOCKEN */ 498 setbits_le32(&usbctlr->utmip_misc_cfg1, UTMIP_PHY_XTAL_CLOCKEN); 499 500 if (controller->has_hostpc) { 501 if (config->periph_id == PERIPH_ID_USBD) 502 clrbits_le32(&clkrst->crc_utmip_pll_cfg2, 503 UTMIP_FORCE_PD_SAMP_A_POWERDOWN); 504 if (config->periph_id == PERIPH_ID_USB2) 505 clrbits_le32(&clkrst->crc_utmip_pll_cfg2, 506 UTMIP_FORCE_PD_SAMP_B_POWERDOWN); 507 if (config->periph_id == PERIPH_ID_USB3) 508 clrbits_le32(&clkrst->crc_utmip_pll_cfg2, 509 UTMIP_FORCE_PD_SAMP_C_POWERDOWN); 510 } 511 /* Finished the per-controller init. */ 512 513 /* De-assert UTMIP_RESET to bring out of reset. */ 514 clrbits_le32(&usbctlr->susp_ctrl, UTMIP_RESET); 515 516 /* Wait for the phy clock to become valid in 100 ms */ 517 for (loop_count = 100000; loop_count != 0; loop_count--) { 518 if (readl(&usbctlr->susp_ctrl) & USB_PHY_CLK_VALID) 519 break; 520 udelay(1); 521 } 522 if (!loop_count) 523 return -1; 524 525 /* Disable ICUSB FS/LS transceiver */ 526 clrbits_le32(&usbctlr->icusb_ctrl, IC_ENB1); 527 528 /* Select UTMI parallel interface */ 529 init_phy_mux(config, PTS_UTMI, init); 530 531 /* Deassert power down state */ 532 clrbits_le32(&usbctlr->utmip_xcvr_cfg0, UTMIP_FORCE_PD_POWERDOWN | 533 UTMIP_FORCE_PD2_POWERDOWN | UTMIP_FORCE_PDZI_POWERDOWN); 534 clrbits_le32(&usbctlr->utmip_xcvr_cfg1, UTMIP_FORCE_PDDISC_POWERDOWN | 535 UTMIP_FORCE_PDCHRP_POWERDOWN | UTMIP_FORCE_PDDR_POWERDOWN); 536 537 if (controller->has_hostpc) { 538 /* 539 * BIAS Pad Power Down is common among all 3 USB 540 * controllers and can be controlled from USB1 only. 541 */ 542 usb1ctlr = (struct usb_ctlr *) 543 ((u32)config->reg & USB1_ADDR_MASK); 544 clrbits_le32(&usb1ctlr->utmip_bias_cfg0, UTMIP_BIASPD); 545 udelay(25); 546 clrbits_le32(&usb1ctlr->utmip_bias_cfg1, 547 UTMIP_FORCE_PDTRK_POWERDOWN); 548 } 549 return 0; 550 } 551 552 #ifdef CONFIG_USB_ULPI 553 /* if board file does not set a ULPI reference frequency we default to 24MHz */ 554 #ifndef CONFIG_ULPI_REF_CLK 555 #define CONFIG_ULPI_REF_CLK 24000000 556 #endif 557 558 /* set up the ULPI USB controller with the parameters provided */ 559 static int init_ulpi_usb_controller(struct fdt_usb *config, 560 enum usb_init_type init) 561 { 562 u32 val; 563 int loop_count; 564 struct ulpi_viewport ulpi_vp; 565 struct usb_ctlr *usbctlr = config->reg; 566 567 /* set up ULPI reference clock on pllp_out4 */ 568 clock_enable(PERIPH_ID_DEV2_OUT); 569 clock_set_pllout(CLOCK_ID_PERIPH, PLL_OUT4, CONFIG_ULPI_REF_CLK); 570 571 /* reset ULPI phy */ 572 if (fdt_gpio_isvalid(&config->phy_reset_gpio)) { 573 fdtdec_setup_gpio(&config->phy_reset_gpio); 574 gpio_direction_output(config->phy_reset_gpio.gpio, 0); 575 mdelay(5); 576 gpio_set_value(config->phy_reset_gpio.gpio, 1); 577 } 578 579 /* Reset the usb controller */ 580 clock_enable(config->periph_id); 581 usbf_reset_controller(config, usbctlr); 582 583 /* enable pinmux bypass */ 584 setbits_le32(&usbctlr->ulpi_timing_ctrl_0, 585 ULPI_CLKOUT_PINMUX_BYP | ULPI_OUTPUT_PINMUX_BYP); 586 587 /* Select ULPI parallel interface */ 588 init_phy_mux(config, PTS_ULPI, init); 589 590 /* enable ULPI transceiver */ 591 setbits_le32(&usbctlr->susp_ctrl, ULPI_PHY_ENB); 592 593 /* configure ULPI transceiver timings */ 594 val = 0; 595 writel(val, &usbctlr->ulpi_timing_ctrl_1); 596 597 val |= ULPI_DATA_TRIMMER_SEL(4); 598 val |= ULPI_STPDIRNXT_TRIMMER_SEL(4); 599 val |= ULPI_DIR_TRIMMER_SEL(4); 600 writel(val, &usbctlr->ulpi_timing_ctrl_1); 601 udelay(10); 602 603 val |= ULPI_DATA_TRIMMER_LOAD; 604 val |= ULPI_STPDIRNXT_TRIMMER_LOAD; 605 val |= ULPI_DIR_TRIMMER_LOAD; 606 writel(val, &usbctlr->ulpi_timing_ctrl_1); 607 608 /* set up phy for host operation with external vbus supply */ 609 ulpi_vp.port_num = 0; 610 ulpi_vp.viewport_addr = (u32)&usbctlr->ulpi_viewport; 611 612 if (ulpi_init(&ulpi_vp)) { 613 printf("Tegra ULPI viewport init failed\n"); 614 return -1; 615 } 616 617 ulpi_set_vbus(&ulpi_vp, 1, 1); 618 ulpi_set_vbus_indicator(&ulpi_vp, 1, 1, 0); 619 620 /* enable wakeup events */ 621 setbits_le32(&usbctlr->port_sc1, WKCN | WKDS | WKOC); 622 623 /* Enable and wait for the phy clock to become valid in 100 ms */ 624 setbits_le32(&usbctlr->susp_ctrl, USB_SUSP_CLR); 625 for (loop_count = 100000; loop_count != 0; loop_count--) { 626 if (readl(&usbctlr->susp_ctrl) & USB_PHY_CLK_VALID) 627 break; 628 udelay(1); 629 } 630 if (!loop_count) 631 return -1; 632 clrbits_le32(&usbctlr->susp_ctrl, USB_SUSP_CLR); 633 634 return 0; 635 } 636 #else 637 static int init_ulpi_usb_controller(struct fdt_usb *config, 638 enum usb_init_type init) 639 { 640 printf("No code to set up ULPI controller, please enable" 641 "CONFIG_USB_ULPI and CONFIG_USB_ULPI_VIEWPORT"); 642 return -1; 643 } 644 #endif 645 646 static void config_clock(const u32 timing[]) 647 { 648 clock_start_pll(CLOCK_ID_USB, 649 timing[PARAM_DIVM], timing[PARAM_DIVN], timing[PARAM_DIVP], 650 timing[PARAM_CPCON], timing[PARAM_LFCON]); 651 } 652 653 static int fdt_decode_usb(const void *blob, int node, struct fdt_usb *config) 654 { 655 const char *phy, *mode; 656 657 config->reg = (struct usb_ctlr *)fdtdec_get_addr(blob, node, "reg"); 658 mode = fdt_getprop(blob, node, "dr_mode", NULL); 659 if (mode) { 660 if (0 == strcmp(mode, "host")) 661 config->dr_mode = DR_MODE_HOST; 662 else if (0 == strcmp(mode, "peripheral")) 663 config->dr_mode = DR_MODE_DEVICE; 664 else if (0 == strcmp(mode, "otg")) 665 config->dr_mode = DR_MODE_OTG; 666 else { 667 debug("%s: Cannot decode dr_mode '%s'\n", __func__, 668 mode); 669 return -FDT_ERR_NOTFOUND; 670 } 671 } else { 672 config->dr_mode = DR_MODE_HOST; 673 } 674 675 phy = fdt_getprop(blob, node, "phy_type", NULL); 676 config->utmi = phy && 0 == strcmp("utmi", phy); 677 config->ulpi = phy && 0 == strcmp("ulpi", phy); 678 config->enabled = fdtdec_get_is_enabled(blob, node); 679 config->has_legacy_mode = fdtdec_get_bool(blob, node, 680 "nvidia,has-legacy-mode"); 681 if (config->has_legacy_mode) 682 port_addr_clear_csc = (u32) config->reg; 683 config->periph_id = clock_decode_periph_id(blob, node); 684 if (config->periph_id == PERIPH_ID_NONE) { 685 debug("%s: Missing/invalid peripheral ID\n", __func__); 686 return -FDT_ERR_NOTFOUND; 687 } 688 fdtdec_decode_gpio(blob, node, "nvidia,vbus-gpio", &config->vbus_gpio); 689 fdtdec_decode_gpio(blob, node, "nvidia,phy-reset-gpio", 690 &config->phy_reset_gpio); 691 debug("enabled=%d, legacy_mode=%d, utmi=%d, ulpi=%d, periph_id=%d, " 692 "vbus=%d, phy_reset=%d, dr_mode=%d\n", 693 config->enabled, config->has_legacy_mode, config->utmi, 694 config->ulpi, config->periph_id, config->vbus_gpio.gpio, 695 config->phy_reset_gpio.gpio, config->dr_mode); 696 697 return 0; 698 } 699 700 /* 701 * process_usb_nodes() - Process a list of USB nodes, adding them to our list 702 * of USB ports. 703 * @blob: fdt blob 704 * @node_list: list of nodes to process (any <=0 are ignored) 705 * @count: number of nodes to process 706 * 707 * Return: 0 - ok, -1 - error 708 */ 709 static int process_usb_nodes(const void *blob, int node_list[], int count) 710 { 711 struct fdt_usb config; 712 int node, i; 713 int clk_done = 0; 714 715 port_count = 0; 716 for (i = 0; i < count; i++) { 717 if (port_count == USB_PORTS_MAX) { 718 printf("tegrausb: Cannot register more than %d ports\n", 719 USB_PORTS_MAX); 720 return -1; 721 } 722 723 debug("USB %d: ", i); 724 node = node_list[i]; 725 if (!node) 726 continue; 727 if (fdt_decode_usb(blob, node, &config)) { 728 debug("Cannot decode USB node %s\n", 729 fdt_get_name(blob, node, NULL)); 730 return -1; 731 } 732 if (!clk_done) { 733 config_clock(get_pll_timing()); 734 clk_done = 1; 735 } 736 config.initialized = 0; 737 738 /* add new USB port to the list of available ports */ 739 port[port_count++] = config; 740 } 741 742 return 0; 743 } 744 745 int usb_process_devicetree(const void *blob) 746 { 747 int node_list[USB_PORTS_MAX]; 748 int count, err = 0; 749 int i; 750 751 for (i = 0; i < ARRAY_SIZE(fdt_usb_controllers); i++) { 752 controller = &fdt_usb_controllers[i]; 753 754 count = fdtdec_find_aliases_for_id(blob, "usb", 755 controller->compat, node_list, USB_PORTS_MAX); 756 if (count) { 757 err = process_usb_nodes(blob, node_list, count); 758 if (err) 759 printf("%s: Error processing USB node!\n", 760 __func__); 761 return err; 762 } 763 } 764 if (i == ARRAY_SIZE(fdt_usb_controllers)) 765 controller = NULL; 766 767 return err; 768 } 769 770 /** 771 * Start up the given port number (ports are numbered from 0 on each board). 772 * This returns values for the appropriate hccr and hcor addresses to use for 773 * USB EHCI operations. 774 * 775 * @param index port number to start 776 * @param hccr returns start address of EHCI HCCR registers 777 * @param hcor returns start address of EHCI HCOR registers 778 * @return 0 if ok, -1 on error (generally invalid port number) 779 */ 780 int ehci_hcd_init(int index, enum usb_init_type init, 781 struct ehci_hccr **hccr, struct ehci_hcor **hcor) 782 { 783 struct fdt_usb *config; 784 struct usb_ctlr *usbctlr; 785 786 if (index >= port_count) 787 return -1; 788 789 config = &port[index]; 790 791 switch (init) { 792 case USB_INIT_HOST: 793 switch (config->dr_mode) { 794 case DR_MODE_HOST: 795 case DR_MODE_OTG: 796 break; 797 default: 798 printf("tegrausb: Invalid dr_mode %d for host mode\n", 799 config->dr_mode); 800 return -1; 801 } 802 break; 803 case USB_INIT_DEVICE: 804 if (config->periph_id != PERIPH_ID_USBD) { 805 printf("tegrausb: Device mode only supported on first USB controller\n"); 806 return -1; 807 } 808 if (!config->utmi) { 809 printf("tegrausb: Device mode only supported with UTMI PHY\n"); 810 return -1; 811 } 812 switch (config->dr_mode) { 813 case DR_MODE_DEVICE: 814 case DR_MODE_OTG: 815 break; 816 default: 817 printf("tegrausb: Invalid dr_mode %d for device mode\n", 818 config->dr_mode); 819 return -1; 820 } 821 break; 822 default: 823 printf("tegrausb: Unknown USB_INIT_* %d\n", init); 824 return -1; 825 } 826 827 /* skip init, if the port is already initialized */ 828 if (config->initialized && config->init_type == init) 829 goto success; 830 831 if (config->utmi && init_utmi_usb_controller(config, init)) { 832 printf("tegrausb: Cannot init port %d\n", index); 833 return -1; 834 } 835 836 if (config->ulpi && init_ulpi_usb_controller(config, init)) { 837 printf("tegrausb: Cannot init port %d\n", index); 838 return -1; 839 } 840 841 set_up_vbus(config, init); 842 843 config->initialized = 1; 844 config->init_type = init; 845 846 success: 847 usbctlr = config->reg; 848 *hccr = (struct ehci_hccr *)&usbctlr->cap_length; 849 *hcor = (struct ehci_hcor *)&usbctlr->usb_cmd; 850 851 return 0; 852 } 853 854 /* 855 * Bring down the specified USB controller 856 */ 857 int ehci_hcd_stop(int index) 858 { 859 struct usb_ctlr *usbctlr; 860 861 usbctlr = port[index].reg; 862 863 /* Stop controller */ 864 writel(0, &usbctlr->usb_cmd); 865 udelay(1000); 866 867 /* Initiate controller reset */ 868 writel(2, &usbctlr->usb_cmd); 869 udelay(1000); 870 871 port[index].initialized = 0; 872 873 return 0; 874 } 875