1 /* 2 * Setup platform devices needed by the Freescale multi-port host 3 * and/or dual-role USB controller modules based on the description 4 * in flat device tree. 5 * 6 * This program is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License as published by the 8 * Free Software Foundation; either version 2 of the License, or (at your 9 * option) any later version. 10 */ 11 12 #include <linux/kernel.h> 13 #include <linux/platform_device.h> 14 #include <linux/fsl_devices.h> 15 #include <linux/err.h> 16 #include <linux/io.h> 17 #include <linux/of_platform.h> 18 #include <linux/clk.h> 19 #include <linux/module.h> 20 #include <linux/dma-mapping.h> 21 22 struct fsl_usb2_dev_data { 23 char *dr_mode; /* controller mode */ 24 char *drivers[3]; /* drivers to instantiate for this mode */ 25 enum fsl_usb2_operating_modes op_mode; /* operating mode */ 26 }; 27 28 static struct fsl_usb2_dev_data dr_mode_data[] = { 29 { 30 .dr_mode = "host", 31 .drivers = { "fsl-ehci", NULL, NULL, }, 32 .op_mode = FSL_USB2_DR_HOST, 33 }, 34 { 35 .dr_mode = "otg", 36 .drivers = { "fsl-usb2-otg", "fsl-ehci", "fsl-usb2-udc", }, 37 .op_mode = FSL_USB2_DR_OTG, 38 }, 39 { 40 .dr_mode = "peripheral", 41 .drivers = { "fsl-usb2-udc", NULL, NULL, }, 42 .op_mode = FSL_USB2_DR_DEVICE, 43 }, 44 }; 45 46 static struct fsl_usb2_dev_data *get_dr_mode_data(struct device_node *np) 47 { 48 const unsigned char *prop; 49 int i; 50 51 prop = of_get_property(np, "dr_mode", NULL); 52 if (prop) { 53 for (i = 0; i < ARRAY_SIZE(dr_mode_data); i++) { 54 if (!strcmp(prop, dr_mode_data[i].dr_mode)) 55 return &dr_mode_data[i]; 56 } 57 } 58 pr_warn("%pOF: Invalid 'dr_mode' property, fallback to host mode\n", 59 np); 60 return &dr_mode_data[0]; /* mode not specified, use host */ 61 } 62 63 static enum fsl_usb2_phy_modes determine_usb_phy(const char *phy_type) 64 { 65 if (!phy_type) 66 return FSL_USB2_PHY_NONE; 67 if (!strcasecmp(phy_type, "ulpi")) 68 return FSL_USB2_PHY_ULPI; 69 if (!strcasecmp(phy_type, "utmi")) 70 return FSL_USB2_PHY_UTMI; 71 if (!strcasecmp(phy_type, "utmi_wide")) 72 return FSL_USB2_PHY_UTMI_WIDE; 73 if (!strcasecmp(phy_type, "utmi_dual")) 74 return FSL_USB2_PHY_UTMI_DUAL; 75 if (!strcasecmp(phy_type, "serial")) 76 return FSL_USB2_PHY_SERIAL; 77 78 return FSL_USB2_PHY_NONE; 79 } 80 81 static struct platform_device *fsl_usb2_device_register( 82 struct platform_device *ofdev, 83 struct fsl_usb2_platform_data *pdata, 84 const char *name, int id) 85 { 86 struct platform_device *pdev; 87 const struct resource *res = ofdev->resource; 88 unsigned int num = ofdev->num_resources; 89 int retval; 90 91 pdev = platform_device_alloc(name, id); 92 if (!pdev) { 93 retval = -ENOMEM; 94 goto error; 95 } 96 97 pdev->dev.parent = &ofdev->dev; 98 99 pdev->dev.coherent_dma_mask = ofdev->dev.coherent_dma_mask; 100 101 if (!pdev->dev.dma_mask) 102 pdev->dev.dma_mask = &ofdev->dev.coherent_dma_mask; 103 else 104 dma_set_mask(&pdev->dev, DMA_BIT_MASK(32)); 105 106 retval = platform_device_add_data(pdev, pdata, sizeof(*pdata)); 107 if (retval) 108 goto error; 109 110 if (num) { 111 retval = platform_device_add_resources(pdev, res, num); 112 if (retval) 113 goto error; 114 } 115 116 retval = platform_device_add(pdev); 117 if (retval) 118 goto error; 119 120 return pdev; 121 122 error: 123 platform_device_put(pdev); 124 return ERR_PTR(retval); 125 } 126 127 static const struct of_device_id fsl_usb2_mph_dr_of_match[]; 128 129 static enum fsl_usb2_controller_ver usb_get_ver_info(struct device_node *np) 130 { 131 enum fsl_usb2_controller_ver ver = FSL_USB_VER_NONE; 132 133 /* 134 * returns 1 for usb controller version 1.6 135 * returns 2 for usb controller version 2.2 136 * returns 3 for usb controller version 2.4 137 * returns 4 for usb controller version 2.5 138 * returns 0 otherwise 139 */ 140 if (of_device_is_compatible(np, "fsl-usb2-dr")) { 141 if (of_device_is_compatible(np, "fsl-usb2-dr-v1.6")) 142 ver = FSL_USB_VER_1_6; 143 else if (of_device_is_compatible(np, "fsl-usb2-dr-v2.2")) 144 ver = FSL_USB_VER_2_2; 145 else if (of_device_is_compatible(np, "fsl-usb2-dr-v2.4")) 146 ver = FSL_USB_VER_2_4; 147 else if (of_device_is_compatible(np, "fsl-usb2-dr-v2.5")) 148 ver = FSL_USB_VER_2_5; 149 else /* for previous controller versions */ 150 ver = FSL_USB_VER_OLD; 151 152 if (ver > FSL_USB_VER_NONE) 153 return ver; 154 } 155 156 if (of_device_is_compatible(np, "fsl,mpc5121-usb2-dr")) 157 return FSL_USB_VER_OLD; 158 159 if (of_device_is_compatible(np, "fsl-usb2-mph")) { 160 if (of_device_is_compatible(np, "fsl-usb2-mph-v1.6")) 161 ver = FSL_USB_VER_1_6; 162 else if (of_device_is_compatible(np, "fsl-usb2-mph-v2.2")) 163 ver = FSL_USB_VER_2_2; 164 else if (of_device_is_compatible(np, "fsl-usb2-mph-v2.4")) 165 ver = FSL_USB_VER_2_4; 166 else if (of_device_is_compatible(np, "fsl-usb2-mph-v2.5")) 167 ver = FSL_USB_VER_2_5; 168 else /* for previous controller versions */ 169 ver = FSL_USB_VER_OLD; 170 } 171 172 return ver; 173 } 174 175 static int fsl_usb2_mph_dr_of_probe(struct platform_device *ofdev) 176 { 177 struct device_node *np = ofdev->dev.of_node; 178 struct platform_device *usb_dev; 179 struct fsl_usb2_platform_data data, *pdata; 180 struct fsl_usb2_dev_data *dev_data; 181 const struct of_device_id *match; 182 const unsigned char *prop; 183 static unsigned int idx; 184 int i; 185 186 if (!of_device_is_available(np)) 187 return -ENODEV; 188 189 match = of_match_device(fsl_usb2_mph_dr_of_match, &ofdev->dev); 190 if (!match) 191 return -ENODEV; 192 193 pdata = &data; 194 if (match->data) 195 memcpy(pdata, match->data, sizeof(data)); 196 else 197 memset(pdata, 0, sizeof(data)); 198 199 dev_data = get_dr_mode_data(np); 200 201 if (of_device_is_compatible(np, "fsl-usb2-mph")) { 202 if (of_get_property(np, "port0", NULL)) 203 pdata->port_enables |= FSL_USB2_PORT0_ENABLED; 204 205 if (of_get_property(np, "port1", NULL)) 206 pdata->port_enables |= FSL_USB2_PORT1_ENABLED; 207 208 pdata->operating_mode = FSL_USB2_MPH_HOST; 209 } else { 210 if (of_get_property(np, "fsl,invert-drvvbus", NULL)) 211 pdata->invert_drvvbus = 1; 212 213 if (of_get_property(np, "fsl,invert-pwr-fault", NULL)) 214 pdata->invert_pwr_fault = 1; 215 216 /* setup mode selected in the device tree */ 217 pdata->operating_mode = dev_data->op_mode; 218 } 219 220 prop = of_get_property(np, "phy_type", NULL); 221 pdata->phy_mode = determine_usb_phy(prop); 222 pdata->controller_ver = usb_get_ver_info(np); 223 224 /* Activate Erratum by reading property in device tree */ 225 pdata->has_fsl_erratum_a007792 = 226 of_property_read_bool(np, "fsl,usb-erratum-a007792"); 227 pdata->has_fsl_erratum_a005275 = 228 of_property_read_bool(np, "fsl,usb-erratum-a005275"); 229 pdata->has_fsl_erratum_a005697 = 230 of_property_read_bool(np, "fsl,usb_erratum-a005697"); 231 232 /* 233 * Determine whether phy_clk_valid needs to be checked 234 * by reading property in device tree 235 */ 236 pdata->check_phy_clk_valid = 237 of_property_read_bool(np, "phy-clk-valid"); 238 239 if (pdata->have_sysif_regs) { 240 if (pdata->controller_ver == FSL_USB_VER_NONE) { 241 dev_warn(&ofdev->dev, "Could not get controller version\n"); 242 return -ENODEV; 243 } 244 } 245 246 for (i = 0; i < ARRAY_SIZE(dev_data->drivers); i++) { 247 if (!dev_data->drivers[i]) 248 continue; 249 usb_dev = fsl_usb2_device_register(ofdev, pdata, 250 dev_data->drivers[i], idx); 251 if (IS_ERR(usb_dev)) { 252 dev_err(&ofdev->dev, "Can't register usb device\n"); 253 return PTR_ERR(usb_dev); 254 } 255 } 256 idx++; 257 return 0; 258 } 259 260 static int __unregister_subdev(struct device *dev, void *d) 261 { 262 platform_device_unregister(to_platform_device(dev)); 263 return 0; 264 } 265 266 static int fsl_usb2_mph_dr_of_remove(struct platform_device *ofdev) 267 { 268 device_for_each_child(&ofdev->dev, NULL, __unregister_subdev); 269 return 0; 270 } 271 272 #ifdef CONFIG_PPC_MPC512x 273 274 #define USBGENCTRL 0x200 /* NOTE: big endian */ 275 #define GC_WU_INT_CLR (1 << 5) /* Wakeup int clear */ 276 #define GC_ULPI_SEL (1 << 4) /* ULPI i/f select (usb0 only)*/ 277 #define GC_PPP (1 << 3) /* Inv. Port Power Polarity */ 278 #define GC_PFP (1 << 2) /* Inv. Power Fault Polarity */ 279 #define GC_WU_ULPI_EN (1 << 1) /* Wakeup on ULPI event */ 280 #define GC_WU_IE (1 << 1) /* Wakeup interrupt enable */ 281 282 #define ISIPHYCTRL 0x204 /* NOTE: big endian */ 283 #define PHYCTRL_PHYE (1 << 4) /* On-chip UTMI PHY enable */ 284 #define PHYCTRL_BSENH (1 << 3) /* Bit Stuff Enable High */ 285 #define PHYCTRL_BSEN (1 << 2) /* Bit Stuff Enable */ 286 #define PHYCTRL_LSFE (1 << 1) /* Line State Filter Enable */ 287 #define PHYCTRL_PXE (1 << 0) /* PHY oscillator enable */ 288 289 int fsl_usb2_mpc5121_init(struct platform_device *pdev) 290 { 291 struct fsl_usb2_platform_data *pdata = dev_get_platdata(&pdev->dev); 292 struct clk *clk; 293 int err; 294 295 clk = devm_clk_get(pdev->dev.parent, "ipg"); 296 if (IS_ERR(clk)) { 297 dev_err(&pdev->dev, "failed to get clk\n"); 298 return PTR_ERR(clk); 299 } 300 err = clk_prepare_enable(clk); 301 if (err) { 302 dev_err(&pdev->dev, "failed to enable clk\n"); 303 return err; 304 } 305 pdata->clk = clk; 306 307 if (pdata->phy_mode == FSL_USB2_PHY_UTMI_WIDE) { 308 u32 reg = 0; 309 310 if (pdata->invert_drvvbus) 311 reg |= GC_PPP; 312 313 if (pdata->invert_pwr_fault) 314 reg |= GC_PFP; 315 316 out_be32(pdata->regs + ISIPHYCTRL, PHYCTRL_PHYE | PHYCTRL_PXE); 317 out_be32(pdata->regs + USBGENCTRL, reg); 318 } 319 return 0; 320 } 321 322 static void fsl_usb2_mpc5121_exit(struct platform_device *pdev) 323 { 324 struct fsl_usb2_platform_data *pdata = dev_get_platdata(&pdev->dev); 325 326 pdata->regs = NULL; 327 328 if (pdata->clk) 329 clk_disable_unprepare(pdata->clk); 330 } 331 332 static struct fsl_usb2_platform_data fsl_usb2_mpc5121_pd = { 333 .big_endian_desc = 1, 334 .big_endian_mmio = 1, 335 .es = 1, 336 .have_sysif_regs = 0, 337 .le_setup_buf = 1, 338 .init = fsl_usb2_mpc5121_init, 339 .exit = fsl_usb2_mpc5121_exit, 340 }; 341 #endif /* CONFIG_PPC_MPC512x */ 342 343 static struct fsl_usb2_platform_data fsl_usb2_mpc8xxx_pd = { 344 .have_sysif_regs = 1, 345 }; 346 347 static const struct of_device_id fsl_usb2_mph_dr_of_match[] = { 348 { .compatible = "fsl-usb2-mph", .data = &fsl_usb2_mpc8xxx_pd, }, 349 { .compatible = "fsl-usb2-dr", .data = &fsl_usb2_mpc8xxx_pd, }, 350 #ifdef CONFIG_PPC_MPC512x 351 { .compatible = "fsl,mpc5121-usb2-dr", .data = &fsl_usb2_mpc5121_pd, }, 352 #endif 353 {}, 354 }; 355 MODULE_DEVICE_TABLE(of, fsl_usb2_mph_dr_of_match); 356 357 static struct platform_driver fsl_usb2_mph_dr_driver = { 358 .driver = { 359 .name = "fsl-usb2-mph-dr", 360 .of_match_table = fsl_usb2_mph_dr_of_match, 361 }, 362 .probe = fsl_usb2_mph_dr_of_probe, 363 .remove = fsl_usb2_mph_dr_of_remove, 364 }; 365 366 module_platform_driver(fsl_usb2_mph_dr_driver); 367 368 MODULE_DESCRIPTION("FSL MPH DR OF devices driver"); 369 MODULE_AUTHOR("Anatolij Gustschin <agust@denx.de>"); 370 MODULE_LICENSE("GPL"); 371