1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * DWC3 glue for Cavium Octeon III SOCs. 4 * 5 * Copyright (C) 2010-2017 Cavium Networks 6 * Copyright (C) 2023 RACOM s.r.o. 7 */ 8 9 #include <linux/bitfield.h> 10 #include <linux/bits.h> 11 #include <linux/device.h> 12 #include <linux/delay.h> 13 #include <linux/io.h> 14 #include <linux/module.h> 15 #include <linux/mutex.h> 16 #include <linux/of.h> 17 #include <linux/of_platform.h> 18 #include <linux/platform_device.h> 19 20 /* 21 * USB Control Register 22 */ 23 #define USBDRD_UCTL_CTL 0x00 24 /* BIST fast-clear mode select. A BIST run with this bit set 25 * clears all entries in USBH RAMs to 0x0. 26 */ 27 # define USBDRD_UCTL_CTL_CLEAR_BIST BIT_ULL(63) 28 /* 1 = Start BIST and cleared by hardware */ 29 # define USBDRD_UCTL_CTL_START_BIST BIT_ULL(62) 30 /* Reference clock select for SuperSpeed and HighSpeed PLLs: 31 * 0x0 = Both PLLs use DLMC_REF_CLK0 for reference clock 32 * 0x1 = Both PLLs use DLMC_REF_CLK1 for reference clock 33 * 0x2 = SuperSpeed PLL uses DLMC_REF_CLK0 for reference clock & 34 * HighSpeed PLL uses PLL_REF_CLK for reference clck 35 * 0x3 = SuperSpeed PLL uses DLMC_REF_CLK1 for reference clock & 36 * HighSpeed PLL uses PLL_REF_CLK for reference clck 37 */ 38 # define USBDRD_UCTL_CTL_REF_CLK_SEL GENMASK_ULL(61, 60) 39 /* 1 = Spread-spectrum clock enable, 0 = SS clock disable */ 40 # define USBDRD_UCTL_CTL_SSC_EN BIT_ULL(59) 41 /* Spread-spectrum clock modulation range: 42 * 0x0 = -4980 ppm downspread 43 * 0x1 = -4492 ppm downspread 44 * 0x2 = -4003 ppm downspread 45 * 0x3 - 0x7 = Reserved 46 */ 47 # define USBDRD_UCTL_CTL_SSC_RANGE GENMASK_ULL(58, 56) 48 /* Enable non-standard oscillator frequencies: 49 * [55:53] = modules -1 50 * [52:47] = 2's complement push amount, 0 = Feature disabled 51 */ 52 # define USBDRD_UCTL_CTL_SSC_REF_CLK_SEL GENMASK_ULL(55, 47) 53 /* Reference clock multiplier for non-standard frequencies: 54 * 0x19 = 100MHz on DLMC_REF_CLK* if REF_CLK_SEL = 0x0 or 0x1 55 * 0x28 = 125MHz on DLMC_REF_CLK* if REF_CLK_SEL = 0x0 or 0x1 56 * 0x32 = 50MHz on DLMC_REF_CLK* if REF_CLK_SEL = 0x0 or 0x1 57 * Other Values = Reserved 58 */ 59 # define USBDRD_UCTL_CTL_MPLL_MULTIPLIER GENMASK_ULL(46, 40) 60 /* Enable reference clock to prescaler for SuperSpeed functionality. 61 * Should always be set to "1" 62 */ 63 # define USBDRD_UCTL_CTL_REF_SSP_EN BIT_ULL(39) 64 /* Divide the reference clock by 2 before entering the 65 * REF_CLK_FSEL divider: 66 * If REF_CLK_SEL = 0x0 or 0x1, then only 0x0 is legal 67 * If REF_CLK_SEL = 0x2 or 0x3, then: 68 * 0x1 = DLMC_REF_CLK* is 125MHz 69 * 0x0 = DLMC_REF_CLK* is another supported frequency 70 */ 71 # define USBDRD_UCTL_CTL_REF_CLK_DIV2 BIT_ULL(38) 72 /* Select reference clock freqnuency for both PLL blocks: 73 * 0x27 = REF_CLK_SEL is 0x0 or 0x1 74 * 0x07 = REF_CLK_SEL is 0x2 or 0x3 75 */ 76 # define USBDRD_UCTL_CTL_REF_CLK_FSEL GENMASK_ULL(37, 32) 77 /* Controller clock enable. */ 78 # define USBDRD_UCTL_CTL_H_CLK_EN BIT_ULL(30) 79 /* Select bypass input to controller clock divider: 80 * 0x0 = Use divided coprocessor clock from H_CLKDIV 81 * 0x1 = Use clock from GPIO pins 82 */ 83 # define USBDRD_UCTL_CTL_H_CLK_BYP_SEL BIT_ULL(29) 84 /* Reset controller clock divider. */ 85 # define USBDRD_UCTL_CTL_H_CLKDIV_RST BIT_ULL(28) 86 /* Clock divider select: 87 * 0x0 = divide by 1 88 * 0x1 = divide by 2 89 * 0x2 = divide by 4 90 * 0x3 = divide by 6 91 * 0x4 = divide by 8 92 * 0x5 = divide by 16 93 * 0x6 = divide by 24 94 * 0x7 = divide by 32 95 */ 96 # define USBDRD_UCTL_CTL_H_CLKDIV_SEL GENMASK_ULL(26, 24) 97 /* USB3 port permanently attached: 0x0 = No, 0x1 = Yes */ 98 # define USBDRD_UCTL_CTL_USB3_PORT_PERM_ATTACH BIT_ULL(21) 99 /* USB2 port permanently attached: 0x0 = No, 0x1 = Yes */ 100 # define USBDRD_UCTL_CTL_USB2_PORT_PERM_ATTACH BIT_ULL(20) 101 /* Disable SuperSpeed PHY: 0x0 = No, 0x1 = Yes */ 102 # define USBDRD_UCTL_CTL_USB3_PORT_DISABLE BIT_ULL(18) 103 /* Disable HighSpeed PHY: 0x0 = No, 0x1 = Yes */ 104 # define USBDRD_UCTL_CTL_USB2_PORT_DISABLE BIT_ULL(16) 105 /* Enable PHY SuperSpeed block power: 0x0 = No, 0x1 = Yes */ 106 # define USBDRD_UCTL_CTL_SS_POWER_EN BIT_ULL(14) 107 /* Enable PHY HighSpeed block power: 0x0 = No, 0x1 = Yes */ 108 # define USBDRD_UCTL_CTL_HS_POWER_EN BIT_ULL(12) 109 /* Enable USB UCTL interface clock: 0xx = No, 0x1 = Yes */ 110 # define USBDRD_UCTL_CTL_CSCLK_EN BIT_ULL(4) 111 /* Controller mode: 0x0 = Host, 0x1 = Device */ 112 # define USBDRD_UCTL_CTL_DRD_MODE BIT_ULL(3) 113 /* PHY reset */ 114 # define USBDRD_UCTL_CTL_UPHY_RST BIT_ULL(2) 115 /* Software reset UAHC */ 116 # define USBDRD_UCTL_CTL_UAHC_RST BIT_ULL(1) 117 /* Software resets UCTL */ 118 # define USBDRD_UCTL_CTL_UCTL_RST BIT_ULL(0) 119 120 #define USBDRD_UCTL_BIST_STATUS 0x08 121 #define USBDRD_UCTL_SPARE0 0x10 122 #define USBDRD_UCTL_INTSTAT 0x30 123 #define USBDRD_UCTL_PORT_CFG_HS(port) (0x40 + (0x20 * port)) 124 #define USBDRD_UCTL_PORT_CFG_SS(port) (0x48 + (0x20 * port)) 125 #define USBDRD_UCTL_PORT_CR_DBG_CFG(port) (0x50 + (0x20 * port)) 126 #define USBDRD_UCTL_PORT_CR_DBG_STATUS(port) (0x58 + (0x20 * port)) 127 128 /* 129 * UCTL Configuration Register 130 */ 131 #define USBDRD_UCTL_HOST_CFG 0xe0 132 /* Indicates minimum value of all received BELT values */ 133 # define USBDRD_UCTL_HOST_CFG_HOST_CURRENT_BELT GENMASK_ULL(59, 48) 134 /* HS jitter adjustment */ 135 # define USBDRD_UCTL_HOST_CFG_FLA GENMASK_ULL(37, 32) 136 /* Bus-master enable: 0x0 = Disabled (stall DMAs), 0x1 = enabled */ 137 # define USBDRD_UCTL_HOST_CFG_BME BIT_ULL(28) 138 /* Overcurrent protection enable: 0x0 = unavailable, 0x1 = available */ 139 # define USBDRD_UCTL_HOST_OCI_EN BIT_ULL(27) 140 /* Overcurrent sene selection: 141 * 0x0 = Overcurrent indication from off-chip is active-low 142 * 0x1 = Overcurrent indication from off-chip is active-high 143 */ 144 # define USBDRD_UCTL_HOST_OCI_ACTIVE_HIGH_EN BIT_ULL(26) 145 /* Port power control enable: 0x0 = unavailable, 0x1 = available */ 146 # define USBDRD_UCTL_HOST_PPC_EN BIT_ULL(25) 147 /* Port power control sense selection: 148 * 0x0 = Port power to off-chip is active-low 149 * 0x1 = Port power to off-chip is active-high 150 */ 151 # define USBDRD_UCTL_HOST_PPC_ACTIVE_HIGH_EN BIT_ULL(24) 152 153 /* 154 * UCTL Shim Features Register 155 */ 156 #define USBDRD_UCTL_SHIM_CFG 0xe8 157 /* Out-of-bound UAHC register access: 0 = read, 1 = write */ 158 # define USBDRD_UCTL_SHIM_CFG_XS_NCB_OOB_WRN BIT_ULL(63) 159 /* SRCID error log for out-of-bound UAHC register access: 160 * [59:58] = chipID 161 * [57] = Request source: 0 = core, 1 = NCB-device 162 * [56:51] = Core/NCB-device number, [56] always 0 for NCB devices 163 * [50:48] = SubID 164 */ 165 # define USBDRD_UCTL_SHIM_CFG_XS_NCB_OOB_OSRC GENMASK_ULL(59, 48) 166 /* Error log for bad UAHC DMA access: 0 = Read log, 1 = Write log */ 167 # define USBDRD_UCTL_SHIM_CFG_XM_BAD_DMA_WRN BIT_ULL(47) 168 /* Encoded error type for bad UAHC DMA */ 169 # define USBDRD_UCTL_SHIM_CFG_XM_BAD_DMA_TYPE GENMASK_ULL(43, 40) 170 /* Select the IOI read command used by DMA accesses */ 171 # define USBDRD_UCTL_SHIM_CFG_DMA_READ_CMD BIT_ULL(12) 172 /* Select endian format for DMA accesses to the L2C: 173 * 0x0 = Little endian 174 * 0x1 = Big endian 175 * 0x2 = Reserved 176 * 0x3 = Reserved 177 */ 178 # define USBDRD_UCTL_SHIM_CFG_DMA_ENDIAN_MODE GENMASK_ULL(9, 8) 179 /* Select endian format for IOI CSR access to UAHC: 180 * 0x0 = Little endian 181 * 0x1 = Big endian 182 * 0x2 = Reserved 183 * 0x3 = Reserved 184 */ 185 # define USBDRD_UCTL_SHIM_CFG_CSR_ENDIAN_MODE GENMASK_ULL(1, 0) 186 187 #define USBDRD_UCTL_ECC 0xf0 188 #define USBDRD_UCTL_SPARE1 0xf8 189 190 struct dwc3_octeon { 191 struct device *dev; 192 void __iomem *base; 193 }; 194 195 #define DWC3_GPIO_POWER_NONE (-1) 196 197 #ifdef CONFIG_CAVIUM_OCTEON_SOC 198 #include <asm/octeon/octeon.h> 199 static inline uint64_t dwc3_octeon_readq(void __iomem *addr) 200 { 201 return cvmx_readq_csr(addr); 202 } 203 204 static inline void dwc3_octeon_writeq(void __iomem *base, uint64_t val) 205 { 206 cvmx_writeq_csr(base, val); 207 } 208 209 static void dwc3_octeon_config_gpio(int index, int gpio) 210 { 211 union cvmx_gpio_bit_cfgx gpio_bit; 212 213 if ((OCTEON_IS_MODEL(OCTEON_CN73XX) || 214 OCTEON_IS_MODEL(OCTEON_CNF75XX)) 215 && gpio <= 31) { 216 gpio_bit.u64 = cvmx_read_csr(CVMX_GPIO_BIT_CFGX(gpio)); 217 gpio_bit.s.tx_oe = 1; 218 gpio_bit.s.output_sel = (index == 0 ? 0x14 : 0x15); 219 cvmx_write_csr(CVMX_GPIO_BIT_CFGX(gpio), gpio_bit.u64); 220 } else if (gpio <= 15) { 221 gpio_bit.u64 = cvmx_read_csr(CVMX_GPIO_BIT_CFGX(gpio)); 222 gpio_bit.s.tx_oe = 1; 223 gpio_bit.s.output_sel = (index == 0 ? 0x14 : 0x19); 224 cvmx_write_csr(CVMX_GPIO_BIT_CFGX(gpio), gpio_bit.u64); 225 } else { 226 gpio_bit.u64 = cvmx_read_csr(CVMX_GPIO_XBIT_CFGX(gpio)); 227 gpio_bit.s.tx_oe = 1; 228 gpio_bit.s.output_sel = (index == 0 ? 0x14 : 0x19); 229 cvmx_write_csr(CVMX_GPIO_XBIT_CFGX(gpio), gpio_bit.u64); 230 } 231 } 232 #else 233 static inline uint64_t dwc3_octeon_readq(void __iomem *addr) 234 { 235 return 0; 236 } 237 238 static inline void dwc3_octeon_writeq(void __iomem *base, uint64_t val) { } 239 240 static inline void dwc3_octeon_config_gpio(int index, int gpio) { } 241 242 static uint64_t octeon_get_io_clock_rate(void) 243 { 244 return 150000000; 245 } 246 #endif 247 248 static int dwc3_octeon_get_divider(void) 249 { 250 static const uint8_t clk_div[] = { 1, 2, 4, 6, 8, 16, 24, 32 }; 251 int div = 0; 252 253 while (div < ARRAY_SIZE(clk_div)) { 254 uint64_t rate = octeon_get_io_clock_rate() / clk_div[div]; 255 if (rate <= 300000000 && rate >= 150000000) 256 return div; 257 div++; 258 } 259 260 return -EINVAL; 261 } 262 263 static int dwc3_octeon_setup(struct dwc3_octeon *octeon, 264 int ref_clk_sel, int ref_clk_fsel, int mpll_mul, 265 int power_gpio, int power_active_low) 266 { 267 u64 val; 268 int div; 269 struct device *dev = octeon->dev; 270 void __iomem *uctl_ctl_reg = octeon->base + USBDRD_UCTL_CTL; 271 void __iomem *uctl_host_cfg_reg = octeon->base + USBDRD_UCTL_HOST_CFG; 272 273 /* 274 * Step 1: Wait for all voltages to be stable...that surely 275 * happened before starting the kernel. SKIP 276 */ 277 278 /* Step 2: Select GPIO for overcurrent indication, if desired. SKIP */ 279 280 /* Step 3: Assert all resets. */ 281 val = dwc3_octeon_readq(uctl_ctl_reg); 282 val |= USBDRD_UCTL_CTL_UPHY_RST | 283 USBDRD_UCTL_CTL_UAHC_RST | 284 USBDRD_UCTL_CTL_UCTL_RST; 285 dwc3_octeon_writeq(uctl_ctl_reg, val); 286 287 /* Step 4a: Reset the clock dividers. */ 288 val = dwc3_octeon_readq(uctl_ctl_reg); 289 val |= USBDRD_UCTL_CTL_H_CLKDIV_RST; 290 dwc3_octeon_writeq(uctl_ctl_reg, val); 291 292 /* Step 4b: Select controller clock frequency. */ 293 div = dwc3_octeon_get_divider(); 294 if (div < 0) { 295 dev_err(dev, "clock divider invalid\n"); 296 return div; 297 } 298 val = dwc3_octeon_readq(uctl_ctl_reg); 299 val &= ~USBDRD_UCTL_CTL_H_CLKDIV_SEL; 300 val |= FIELD_PREP(USBDRD_UCTL_CTL_H_CLKDIV_SEL, div); 301 val |= USBDRD_UCTL_CTL_H_CLK_EN; 302 dwc3_octeon_writeq(uctl_ctl_reg, val); 303 val = dwc3_octeon_readq(uctl_ctl_reg); 304 if ((div != FIELD_GET(USBDRD_UCTL_CTL_H_CLKDIV_SEL, val)) || 305 (!(FIELD_GET(USBDRD_UCTL_CTL_H_CLK_EN, val)))) { 306 dev_err(dev, "clock init failure (UCTL_CTL=%016llx)\n", val); 307 return -EINVAL; 308 } 309 310 /* Step 4c: Deassert the controller clock divider reset. */ 311 val &= ~USBDRD_UCTL_CTL_H_CLKDIV_RST; 312 dwc3_octeon_writeq(uctl_ctl_reg, val); 313 314 /* Step 5a: Reference clock configuration. */ 315 val = dwc3_octeon_readq(uctl_ctl_reg); 316 val &= ~USBDRD_UCTL_CTL_REF_CLK_DIV2; 317 val &= ~USBDRD_UCTL_CTL_REF_CLK_SEL; 318 val |= FIELD_PREP(USBDRD_UCTL_CTL_REF_CLK_SEL, ref_clk_sel); 319 320 val &= ~USBDRD_UCTL_CTL_REF_CLK_FSEL; 321 val |= FIELD_PREP(USBDRD_UCTL_CTL_REF_CLK_FSEL, ref_clk_fsel); 322 323 val &= ~USBDRD_UCTL_CTL_MPLL_MULTIPLIER; 324 val |= FIELD_PREP(USBDRD_UCTL_CTL_MPLL_MULTIPLIER, mpll_mul); 325 326 /* Step 5b: Configure and enable spread-spectrum for SuperSpeed. */ 327 val |= USBDRD_UCTL_CTL_SSC_EN; 328 329 /* Step 5c: Enable SuperSpeed. */ 330 val |= USBDRD_UCTL_CTL_REF_SSP_EN; 331 332 /* Step 5d: Configure PHYs. SKIP */ 333 334 /* Step 6a & 6b: Power up PHYs. */ 335 val |= USBDRD_UCTL_CTL_HS_POWER_EN; 336 val |= USBDRD_UCTL_CTL_SS_POWER_EN; 337 dwc3_octeon_writeq(uctl_ctl_reg, val); 338 339 /* Step 7: Wait 10 controller-clock cycles to take effect. */ 340 udelay(10); 341 342 /* Step 8a: Deassert UCTL reset signal. */ 343 val = dwc3_octeon_readq(uctl_ctl_reg); 344 val &= ~USBDRD_UCTL_CTL_UCTL_RST; 345 dwc3_octeon_writeq(uctl_ctl_reg, val); 346 347 /* Step 8b: Wait 10 controller-clock cycles. */ 348 udelay(10); 349 350 /* Step 8c: Setup power control. */ 351 val = dwc3_octeon_readq(uctl_host_cfg_reg); 352 val |= USBDRD_UCTL_HOST_PPC_EN; 353 if (power_gpio == DWC3_GPIO_POWER_NONE) { 354 val &= ~USBDRD_UCTL_HOST_PPC_EN; 355 } else { 356 val |= USBDRD_UCTL_HOST_PPC_EN; 357 dwc3_octeon_config_gpio(((__force uintptr_t)octeon->base >> 24) & 1, 358 power_gpio); 359 dev_dbg(dev, "power control is using gpio%d\n", power_gpio); 360 } 361 if (power_active_low) 362 val &= ~USBDRD_UCTL_HOST_PPC_ACTIVE_HIGH_EN; 363 else 364 val |= USBDRD_UCTL_HOST_PPC_ACTIVE_HIGH_EN; 365 dwc3_octeon_writeq(uctl_host_cfg_reg, val); 366 367 /* Step 8d: Deassert UAHC reset signal. */ 368 val = dwc3_octeon_readq(uctl_ctl_reg); 369 val &= ~USBDRD_UCTL_CTL_UAHC_RST; 370 dwc3_octeon_writeq(uctl_ctl_reg, val); 371 372 /* Step 8e: Wait 10 controller-clock cycles. */ 373 udelay(10); 374 375 /* Step 9: Enable conditional coprocessor clock of UCTL. */ 376 val = dwc3_octeon_readq(uctl_ctl_reg); 377 val |= USBDRD_UCTL_CTL_CSCLK_EN; 378 dwc3_octeon_writeq(uctl_ctl_reg, val); 379 380 /*Step 10: Set for host mode only. */ 381 val = dwc3_octeon_readq(uctl_ctl_reg); 382 val &= ~USBDRD_UCTL_CTL_DRD_MODE; 383 dwc3_octeon_writeq(uctl_ctl_reg, val); 384 385 return 0; 386 } 387 388 static void dwc3_octeon_set_endian_mode(struct dwc3_octeon *octeon) 389 { 390 u64 val; 391 void __iomem *uctl_shim_cfg_reg = octeon->base + USBDRD_UCTL_SHIM_CFG; 392 393 val = dwc3_octeon_readq(uctl_shim_cfg_reg); 394 val &= ~USBDRD_UCTL_SHIM_CFG_DMA_ENDIAN_MODE; 395 val &= ~USBDRD_UCTL_SHIM_CFG_CSR_ENDIAN_MODE; 396 #ifdef __BIG_ENDIAN 397 val |= FIELD_PREP(USBDRD_UCTL_SHIM_CFG_DMA_ENDIAN_MODE, 1); 398 val |= FIELD_PREP(USBDRD_UCTL_SHIM_CFG_CSR_ENDIAN_MODE, 1); 399 #endif 400 dwc3_octeon_writeq(uctl_shim_cfg_reg, val); 401 } 402 403 static void dwc3_octeon_phy_reset(struct dwc3_octeon *octeon) 404 { 405 u64 val; 406 void __iomem *uctl_ctl_reg = octeon->base + USBDRD_UCTL_CTL; 407 408 val = dwc3_octeon_readq(uctl_ctl_reg); 409 val &= ~USBDRD_UCTL_CTL_UPHY_RST; 410 dwc3_octeon_writeq(uctl_ctl_reg, val); 411 } 412 413 static int dwc3_octeon_probe(struct platform_device *pdev) 414 { 415 struct device *dev = &pdev->dev; 416 struct device_node *node = dev->of_node; 417 struct dwc3_octeon *octeon; 418 const char *hs_clock_type, *ss_clock_type; 419 int ref_clk_sel, ref_clk_fsel, mpll_mul; 420 int power_active_low, power_gpio; 421 int err, len; 422 u32 clock_rate; 423 424 if (of_property_read_u32(node, "refclk-frequency", &clock_rate)) { 425 dev_err(dev, "No UCTL \"refclk-frequency\"\n"); 426 return -EINVAL; 427 } 428 if (of_property_read_string(node, "refclk-type-ss", &ss_clock_type)) { 429 dev_err(dev, "No UCTL \"refclk-type-ss\"\n"); 430 return -EINVAL; 431 } 432 if (of_property_read_string(node, "refclk-type-hs", &hs_clock_type)) { 433 dev_err(dev, "No UCTL \"refclk-type-hs\"\n"); 434 return -EINVAL; 435 } 436 437 ref_clk_sel = 2; 438 if (strcmp("dlmc_ref_clk0", ss_clock_type) == 0) { 439 if (strcmp(hs_clock_type, "dlmc_ref_clk0") == 0) 440 ref_clk_sel = 0; 441 else if (strcmp(hs_clock_type, "pll_ref_clk")) 442 dev_warn(dev, "Invalid HS clock type %s, using pll_ref_clk instead\n", 443 hs_clock_type); 444 } else if (strcmp(ss_clock_type, "dlmc_ref_clk1") == 0) { 445 if (strcmp(hs_clock_type, "dlmc_ref_clk1") == 0) { 446 ref_clk_sel = 1; 447 } else { 448 ref_clk_sel = 3; 449 if (strcmp(hs_clock_type, "pll_ref_clk")) 450 dev_warn(dev, "Invalid HS clock type %s, using pll_ref_clk instead\n", 451 hs_clock_type); 452 } 453 } else { 454 dev_warn(dev, "Invalid SS clock type %s, using dlmc_ref_clk0 instead\n", 455 ss_clock_type); 456 } 457 458 ref_clk_fsel = 0x07; 459 switch (clock_rate) { 460 default: 461 dev_warn(dev, "Invalid ref_clk %u, using 100000000 instead\n", 462 clock_rate); 463 fallthrough; 464 case 100000000: 465 mpll_mul = 0x19; 466 if (ref_clk_sel < 2) 467 ref_clk_fsel = 0x27; 468 break; 469 case 50000000: 470 mpll_mul = 0x32; 471 break; 472 case 125000000: 473 mpll_mul = 0x28; 474 break; 475 } 476 477 power_gpio = DWC3_GPIO_POWER_NONE; 478 power_active_low = 0; 479 if (of_find_property(node, "power", &len)) { 480 u32 gpio_pwr[3]; 481 482 switch (len) { 483 case 8: 484 of_property_read_u32_array(node, "power", gpio_pwr, 2); 485 break; 486 case 12: 487 of_property_read_u32_array(node, "power", gpio_pwr, 3); 488 power_active_low = gpio_pwr[2] & 0x01; 489 break; 490 default: 491 dev_err(dev, "invalid power configuration\n"); 492 return -EINVAL; 493 } 494 power_gpio = gpio_pwr[1]; 495 } 496 497 octeon = devm_kzalloc(dev, sizeof(*octeon), GFP_KERNEL); 498 if (!octeon) 499 return -ENOMEM; 500 501 octeon->dev = dev; 502 octeon->base = devm_platform_ioremap_resource(pdev, 0); 503 if (IS_ERR(octeon->base)) 504 return PTR_ERR(octeon->base); 505 506 err = dwc3_octeon_setup(octeon, ref_clk_sel, ref_clk_fsel, mpll_mul, 507 power_gpio, power_active_low); 508 if (err) 509 return err; 510 511 dwc3_octeon_set_endian_mode(octeon); 512 dwc3_octeon_phy_reset(octeon); 513 514 platform_set_drvdata(pdev, octeon); 515 516 return of_platform_populate(node, NULL, NULL, dev); 517 } 518 519 static void dwc3_octeon_remove(struct platform_device *pdev) 520 { 521 struct dwc3_octeon *octeon = platform_get_drvdata(pdev); 522 523 of_platform_depopulate(octeon->dev); 524 } 525 526 static const struct of_device_id dwc3_octeon_of_match[] = { 527 { .compatible = "cavium,octeon-7130-usb-uctl" }, 528 { }, 529 }; 530 MODULE_DEVICE_TABLE(of, dwc3_octeon_of_match); 531 532 static struct platform_driver dwc3_octeon_driver = { 533 .probe = dwc3_octeon_probe, 534 .remove_new = dwc3_octeon_remove, 535 .driver = { 536 .name = "dwc3-octeon", 537 .of_match_table = dwc3_octeon_of_match, 538 }, 539 }; 540 module_platform_driver(dwc3_octeon_driver); 541 542 MODULE_ALIAS("platform:dwc3-octeon"); 543 MODULE_AUTHOR("Ladislav Michl <ladis@linux-mips.org>"); 544 MODULE_LICENSE("GPL"); 545 MODULE_DESCRIPTION("DesignWare USB3 OCTEON III Glue Layer"); 546