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