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