1 /* 2 * Sunxi usb-phy code 3 * 4 * Copyright (C) 2015 Hans de Goede <hdegoede@redhat.com> 5 * Copyright (C) 2014 Roman Byshko <rbyshko@gmail.com> 6 * 7 * Based on code from 8 * Allwinner Technology Co., Ltd. <www.allwinnertech.com> 9 * 10 * SPDX-License-Identifier: GPL-2.0+ 11 */ 12 13 #include <common.h> 14 #include <asm/arch/clock.h> 15 #include <asm/arch/cpu.h> 16 #include <asm/arch/usb_phy.h> 17 #include <asm/gpio.h> 18 #include <asm/io.h> 19 #include <errno.h> 20 21 #define SUNXI_USB_PMU_IRQ_ENABLE 0x800 22 #ifdef CONFIG_MACH_SUN8I_A33 23 #define SUNXI_USB_CSR 0x410 24 #else 25 #define SUNXI_USB_CSR 0x404 26 #endif 27 #define SUNXI_USB_PASSBY_EN 1 28 29 #define SUNXI_EHCI_AHB_ICHR8_EN (1 << 10) 30 #define SUNXI_EHCI_AHB_INCR4_BURST_EN (1 << 9) 31 #define SUNXI_EHCI_AHB_INCRX_ALIGN_EN (1 << 8) 32 #define SUNXI_EHCI_ULPI_BYPASS_EN (1 << 0) 33 34 #define REG_PHY_UNK_H3 0x420 35 #define REG_PMU_UNK_H3 0x810 36 37 /* A83T specific control bits for PHY0 */ 38 #define SUNXI_PHY_CTL_VBUSVLDEXT BIT(5) 39 #define SUNXI_PHY_CTL_SIDDQ BIT(3) 40 41 /* A83T HSIC specific bits */ 42 #define SUNXI_EHCI_HS_FORCE BIT(20) 43 #define SUNXI_EHCI_CONNECT_DET BIT(17) 44 #define SUNXI_EHCI_CONNECT_INT BIT(16) 45 #define SUNXI_EHCI_HSIC BIT(1) 46 47 static struct sunxi_usb_phy { 48 int usb_rst_mask; 49 int gpio_vbus; 50 int gpio_vbus_det; 51 int gpio_id_det; 52 int id; 53 int init_count; 54 int power_on_count; 55 ulong base; 56 } sunxi_usb_phy[] = { 57 { 58 .usb_rst_mask = CCM_USB_CTRL_PHY0_RST | CCM_USB_CTRL_PHY0_CLK, 59 .id = 0, 60 .base = SUNXI_USB0_BASE, 61 }, 62 { 63 .usb_rst_mask = CCM_USB_CTRL_PHY1_RST | CCM_USB_CTRL_PHY1_CLK, 64 .id = 1, 65 .base = SUNXI_USB1_BASE, 66 }, 67 #if CONFIG_SUNXI_USB_PHYS >= 3 68 { 69 #ifdef CONFIG_MACH_SUN8I_A83T 70 .usb_rst_mask = CCM_USB_CTRL_HSIC_RST | CCM_USB_CTRL_HSIC_CLK | 71 CCM_USB_CTRL_12M_CLK, 72 #else 73 .usb_rst_mask = CCM_USB_CTRL_PHY2_RST | CCM_USB_CTRL_PHY2_CLK, 74 #endif 75 .id = 2, 76 .base = SUNXI_USB2_BASE, 77 }, 78 #endif 79 #if CONFIG_SUNXI_USB_PHYS >= 4 80 { 81 .usb_rst_mask = CCM_USB_CTRL_PHY3_RST | CCM_USB_CTRL_PHY3_CLK, 82 .id = 3, 83 .base = SUNXI_USB3_BASE, 84 } 85 #endif 86 }; 87 88 static int initial_usb_scan_delay = CONFIG_INITIAL_USB_SCAN_DELAY; 89 90 static int get_vbus_gpio(int index) 91 { 92 switch (index) { 93 case 0: return sunxi_name_to_gpio(CONFIG_USB0_VBUS_PIN); 94 case 1: return sunxi_name_to_gpio(CONFIG_USB1_VBUS_PIN); 95 case 2: return sunxi_name_to_gpio(CONFIG_USB2_VBUS_PIN); 96 case 3: return sunxi_name_to_gpio(CONFIG_USB3_VBUS_PIN); 97 } 98 return -EINVAL; 99 } 100 101 static int get_vbus_detect_gpio(int index) 102 { 103 switch (index) { 104 case 0: return sunxi_name_to_gpio(CONFIG_USB0_VBUS_DET); 105 } 106 return -EINVAL; 107 } 108 109 static int get_id_detect_gpio(int index) 110 { 111 switch (index) { 112 case 0: return sunxi_name_to_gpio(CONFIG_USB0_ID_DET); 113 } 114 return -EINVAL; 115 } 116 117 __maybe_unused static void usb_phy_write(struct sunxi_usb_phy *phy, int addr, 118 int data, int len) 119 { 120 int j = 0, usbc_bit = 0; 121 void *dest = (void *)SUNXI_USB0_BASE + SUNXI_USB_CSR; 122 123 #ifdef CONFIG_MACH_SUN8I_A33 124 /* CSR needs to be explicitly initialized to 0 on A33 */ 125 writel(0, dest); 126 #endif 127 128 usbc_bit = 1 << (phy->id * 2); 129 for (j = 0; j < len; j++) { 130 /* set the bit address to be written */ 131 clrbits_le32(dest, 0xff << 8); 132 setbits_le32(dest, (addr + j) << 8); 133 134 clrbits_le32(dest, usbc_bit); 135 /* set data bit */ 136 if (data & 0x1) 137 setbits_le32(dest, 1 << 7); 138 else 139 clrbits_le32(dest, 1 << 7); 140 141 setbits_le32(dest, usbc_bit); 142 143 clrbits_le32(dest, usbc_bit); 144 145 data >>= 1; 146 } 147 } 148 149 #if defined CONFIG_MACH_SUN8I_H3 150 static void sunxi_usb_phy_config(struct sunxi_usb_phy *phy) 151 { 152 if (phy->id == 0) 153 clrbits_le32(SUNXI_USBPHY_BASE + REG_PHY_UNK_H3, 0x01); 154 155 clrbits_le32(phy->base + REG_PMU_UNK_H3, 0x02); 156 } 157 #elif defined CONFIG_MACH_SUN8I_A83T 158 static void sunxi_usb_phy_config(struct sunxi_usb_phy *phy) 159 { 160 } 161 #else 162 static void sunxi_usb_phy_config(struct sunxi_usb_phy *phy) 163 { 164 /* The following comments are machine 165 * translated from Chinese, you have been warned! 166 */ 167 168 /* Regulation 45 ohms */ 169 if (phy->id == 0) 170 usb_phy_write(phy, 0x0c, 0x01, 1); 171 172 /* adjust PHY's magnitude and rate */ 173 usb_phy_write(phy, 0x20, 0x14, 5); 174 175 /* threshold adjustment disconnect */ 176 #if defined CONFIG_MACH_SUN5I || defined CONFIG_MACH_SUN7I 177 usb_phy_write(phy, 0x2a, 2, 2); 178 #else 179 usb_phy_write(phy, 0x2a, 3, 2); 180 #endif 181 182 return; 183 } 184 #endif 185 186 static void sunxi_usb_phy_passby(struct sunxi_usb_phy *phy, int enable) 187 { 188 unsigned long bits = 0; 189 void *addr; 190 191 addr = (void *)phy->base + SUNXI_USB_PMU_IRQ_ENABLE; 192 193 bits = SUNXI_EHCI_AHB_ICHR8_EN | 194 SUNXI_EHCI_AHB_INCR4_BURST_EN | 195 SUNXI_EHCI_AHB_INCRX_ALIGN_EN | 196 SUNXI_EHCI_ULPI_BYPASS_EN; 197 198 #ifdef CONFIG_MACH_SUN8I_A83T 199 if (phy->id == 2) 200 bits |= SUNXI_EHCI_HS_FORCE | 201 SUNXI_EHCI_CONNECT_INT | 202 SUNXI_EHCI_HSIC; 203 #endif 204 205 if (enable) 206 setbits_le32(addr, bits); 207 else 208 clrbits_le32(addr, bits); 209 210 return; 211 } 212 213 void sunxi_usb_phy_enable_squelch_detect(int index, int enable) 214 { 215 #ifndef CONFIG_MACH_SUN8I_A83T 216 struct sunxi_usb_phy *phy = &sunxi_usb_phy[index]; 217 218 usb_phy_write(phy, 0x3c, enable ? 0 : 2, 2); 219 #endif 220 } 221 222 void sunxi_usb_phy_init(int index) 223 { 224 struct sunxi_usb_phy *phy = &sunxi_usb_phy[index]; 225 struct sunxi_ccm_reg *ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE; 226 227 phy->init_count++; 228 if (phy->init_count != 1) 229 return; 230 231 setbits_le32(&ccm->usb_clk_cfg, phy->usb_rst_mask); 232 233 sunxi_usb_phy_config(phy); 234 235 if (phy->id != 0) 236 sunxi_usb_phy_passby(phy, SUNXI_USB_PASSBY_EN); 237 238 #ifdef CONFIG_MACH_SUN8I_A83T 239 if (phy->id == 0) { 240 setbits_le32(SUNXI_USB0_BASE + SUNXI_USB_CSR, 241 SUNXI_PHY_CTL_VBUSVLDEXT); 242 clrbits_le32(SUNXI_USB0_BASE + SUNXI_USB_CSR, 243 SUNXI_PHY_CTL_SIDDQ); 244 } 245 #endif 246 } 247 248 void sunxi_usb_phy_exit(int index) 249 { 250 struct sunxi_usb_phy *phy = &sunxi_usb_phy[index]; 251 struct sunxi_ccm_reg *ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE; 252 253 phy->init_count--; 254 if (phy->init_count != 0) 255 return; 256 257 if (phy->id != 0) 258 sunxi_usb_phy_passby(phy, !SUNXI_USB_PASSBY_EN); 259 260 #ifdef CONFIG_MACH_SUN8I_A83T 261 if (phy->id == 0) { 262 setbits_le32(SUNXI_USB0_BASE + SUNXI_USB_CSR, 263 SUNXI_PHY_CTL_SIDDQ); 264 } 265 #endif 266 267 clrbits_le32(&ccm->usb_clk_cfg, phy->usb_rst_mask); 268 } 269 270 void sunxi_usb_phy_power_on(int index) 271 { 272 struct sunxi_usb_phy *phy = &sunxi_usb_phy[index]; 273 274 if (initial_usb_scan_delay) { 275 mdelay(initial_usb_scan_delay); 276 initial_usb_scan_delay = 0; 277 } 278 279 phy->power_on_count++; 280 if (phy->power_on_count != 1) 281 return; 282 283 if (phy->gpio_vbus >= 0) 284 gpio_set_value(phy->gpio_vbus, 1); 285 } 286 287 void sunxi_usb_phy_power_off(int index) 288 { 289 struct sunxi_usb_phy *phy = &sunxi_usb_phy[index]; 290 291 phy->power_on_count--; 292 if (phy->power_on_count != 0) 293 return; 294 295 if (phy->gpio_vbus >= 0) 296 gpio_set_value(phy->gpio_vbus, 0); 297 } 298 299 int sunxi_usb_phy_power_is_on(int index) 300 { 301 struct sunxi_usb_phy *phy = &sunxi_usb_phy[index]; 302 303 return phy->power_on_count > 0; 304 } 305 306 int sunxi_usb_phy_vbus_detect(int index) 307 { 308 struct sunxi_usb_phy *phy = &sunxi_usb_phy[index]; 309 int err, retries = 3; 310 311 if (phy->gpio_vbus_det < 0) 312 return phy->gpio_vbus_det; 313 314 err = gpio_get_value(phy->gpio_vbus_det); 315 /* 316 * Vbus may have been provided by the board and just been turned of 317 * some milliseconds ago on reset, what we're measuring then is a 318 * residual charge on Vbus, sleep a bit and try again. 319 */ 320 while (err > 0 && retries--) { 321 mdelay(100); 322 err = gpio_get_value(phy->gpio_vbus_det); 323 } 324 325 return err; 326 } 327 328 int sunxi_usb_phy_id_detect(int index) 329 { 330 struct sunxi_usb_phy *phy = &sunxi_usb_phy[index]; 331 332 if (phy->gpio_id_det < 0) 333 return phy->gpio_id_det; 334 335 return gpio_get_value(phy->gpio_id_det); 336 } 337 338 int sunxi_usb_phy_probe(void) 339 { 340 struct sunxi_ccm_reg *ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE; 341 struct sunxi_usb_phy *phy; 342 int i, ret = 0; 343 344 for (i = 0; i < CONFIG_SUNXI_USB_PHYS; i++) { 345 phy = &sunxi_usb_phy[i]; 346 347 phy->gpio_vbus = get_vbus_gpio(i); 348 if (phy->gpio_vbus >= 0) { 349 ret = gpio_request(phy->gpio_vbus, "usb_vbus"); 350 if (ret) 351 return ret; 352 ret = gpio_direction_output(phy->gpio_vbus, 0); 353 if (ret) 354 return ret; 355 } 356 357 phy->gpio_vbus_det = get_vbus_detect_gpio(i); 358 if (phy->gpio_vbus_det >= 0) { 359 ret = gpio_request(phy->gpio_vbus_det, "usb_vbus_det"); 360 if (ret) 361 return ret; 362 ret = gpio_direction_input(phy->gpio_vbus_det); 363 if (ret) 364 return ret; 365 } 366 367 phy->gpio_id_det = get_id_detect_gpio(i); 368 if (phy->gpio_id_det >= 0) { 369 ret = gpio_request(phy->gpio_id_det, "usb_id_det"); 370 if (ret) 371 return ret; 372 ret = gpio_direction_input(phy->gpio_id_det); 373 if (ret) 374 return ret; 375 sunxi_gpio_set_pull(phy->gpio_id_det, 376 SUNXI_GPIO_PULL_UP); 377 } 378 } 379 380 setbits_le32(&ccm->usb_clk_cfg, CCM_USB_CTRL_PHYGATE); 381 382 return 0; 383 } 384 385 int sunxi_usb_phy_remove(void) 386 { 387 struct sunxi_ccm_reg *ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE; 388 struct sunxi_usb_phy *phy; 389 int i; 390 391 clrbits_le32(&ccm->usb_clk_cfg, CCM_USB_CTRL_PHYGATE); 392 393 for (i = 0; i < CONFIG_SUNXI_USB_PHYS; i++) { 394 phy = &sunxi_usb_phy[i]; 395 396 if (phy->gpio_vbus >= 0) 397 gpio_free(phy->gpio_vbus); 398 399 if (phy->gpio_vbus_det >= 0) 400 gpio_free(phy->gpio_vbus_det); 401 402 if (phy->gpio_id_det >= 0) 403 gpio_free(phy->gpio_id_det); 404 } 405 406 return 0; 407 } 408