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