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 struct fsl_usb2_dev_data dr_mode_data[] __devinitdata = { 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 struct fsl_usb2_dev_data * __devinit 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 __devinit 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 struct platform_device * __devinit 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 0 otherwise 130 */ 131 if (of_device_is_compatible(np, "fsl-usb2-dr")) { 132 if (of_device_is_compatible(np, "fsl-usb2-dr-v1.6")) 133 ver = FSL_USB_VER_1_6; 134 else if (of_device_is_compatible(np, "fsl-usb2-dr-v2.2")) 135 ver = FSL_USB_VER_2_2; 136 else /* for previous controller versions */ 137 ver = FSL_USB_VER_OLD; 138 139 if (ver > -1) 140 return ver; 141 } 142 143 if (of_device_is_compatible(np, "fsl-usb2-mph")) { 144 if (of_device_is_compatible(np, "fsl-usb2-mph-v1.6")) 145 ver = FSL_USB_VER_1_6; 146 else if (of_device_is_compatible(np, "fsl-usb2-mph-v2.2")) 147 ver = FSL_USB_VER_2_2; 148 else /* for previous controller versions */ 149 ver = FSL_USB_VER_OLD; 150 } 151 152 return ver; 153 } 154 155 static int __devinit fsl_usb2_mph_dr_of_probe(struct platform_device *ofdev) 156 { 157 struct device_node *np = ofdev->dev.of_node; 158 struct platform_device *usb_dev; 159 struct fsl_usb2_platform_data data, *pdata; 160 struct fsl_usb2_dev_data *dev_data; 161 const struct of_device_id *match; 162 const unsigned char *prop; 163 static unsigned int idx; 164 int i; 165 166 if (!of_device_is_available(np)) 167 return -ENODEV; 168 169 match = of_match_device(fsl_usb2_mph_dr_of_match, &ofdev->dev); 170 if (!match) 171 return -ENODEV; 172 173 pdata = &data; 174 if (match->data) 175 memcpy(pdata, match->data, sizeof(data)); 176 else 177 memset(pdata, 0, sizeof(data)); 178 179 dev_data = get_dr_mode_data(np); 180 181 if (of_device_is_compatible(np, "fsl-usb2-mph")) { 182 if (of_get_property(np, "port0", NULL)) 183 pdata->port_enables |= FSL_USB2_PORT0_ENABLED; 184 185 if (of_get_property(np, "port1", NULL)) 186 pdata->port_enables |= FSL_USB2_PORT1_ENABLED; 187 188 pdata->operating_mode = FSL_USB2_MPH_HOST; 189 } else { 190 if (of_get_property(np, "fsl,invert-drvvbus", NULL)) 191 pdata->invert_drvvbus = 1; 192 193 if (of_get_property(np, "fsl,invert-pwr-fault", NULL)) 194 pdata->invert_pwr_fault = 1; 195 196 /* setup mode selected in the device tree */ 197 pdata->operating_mode = dev_data->op_mode; 198 } 199 200 prop = of_get_property(np, "phy_type", NULL); 201 pdata->phy_mode = determine_usb_phy(prop); 202 pdata->controller_ver = usb_get_ver_info(np); 203 204 if (pdata->have_sysif_regs) { 205 if (pdata->controller_ver < 0) { 206 dev_warn(&ofdev->dev, "Could not get controller version\n"); 207 return -ENODEV; 208 } 209 } 210 211 for (i = 0; i < ARRAY_SIZE(dev_data->drivers); i++) { 212 if (!dev_data->drivers[i]) 213 continue; 214 usb_dev = fsl_usb2_device_register(ofdev, pdata, 215 dev_data->drivers[i], idx); 216 if (IS_ERR(usb_dev)) { 217 dev_err(&ofdev->dev, "Can't register usb device\n"); 218 return PTR_ERR(usb_dev); 219 } 220 } 221 idx++; 222 return 0; 223 } 224 225 static int __devexit __unregister_subdev(struct device *dev, void *d) 226 { 227 platform_device_unregister(to_platform_device(dev)); 228 return 0; 229 } 230 231 static int __devexit fsl_usb2_mph_dr_of_remove(struct platform_device *ofdev) 232 { 233 device_for_each_child(&ofdev->dev, NULL, __unregister_subdev); 234 return 0; 235 } 236 237 #ifdef CONFIG_PPC_MPC512x 238 239 #define USBGENCTRL 0x200 /* NOTE: big endian */ 240 #define GC_WU_INT_CLR (1 << 5) /* Wakeup int clear */ 241 #define GC_ULPI_SEL (1 << 4) /* ULPI i/f select (usb0 only)*/ 242 #define GC_PPP (1 << 3) /* Inv. Port Power Polarity */ 243 #define GC_PFP (1 << 2) /* Inv. Power Fault Polarity */ 244 #define GC_WU_ULPI_EN (1 << 1) /* Wakeup on ULPI event */ 245 #define GC_WU_IE (1 << 1) /* Wakeup interrupt enable */ 246 247 #define ISIPHYCTRL 0x204 /* NOTE: big endian */ 248 #define PHYCTRL_PHYE (1 << 4) /* On-chip UTMI PHY enable */ 249 #define PHYCTRL_BSENH (1 << 3) /* Bit Stuff Enable High */ 250 #define PHYCTRL_BSEN (1 << 2) /* Bit Stuff Enable */ 251 #define PHYCTRL_LSFE (1 << 1) /* Line State Filter Enable */ 252 #define PHYCTRL_PXE (1 << 0) /* PHY oscillator enable */ 253 254 int fsl_usb2_mpc5121_init(struct platform_device *pdev) 255 { 256 struct fsl_usb2_platform_data *pdata = pdev->dev.platform_data; 257 struct clk *clk; 258 char clk_name[10]; 259 int base, clk_num; 260 261 base = pdev->resource->start & 0xf000; 262 if (base == 0x3000) 263 clk_num = 1; 264 else if (base == 0x4000) 265 clk_num = 2; 266 else 267 return -ENODEV; 268 269 snprintf(clk_name, sizeof(clk_name), "usb%d_clk", clk_num); 270 clk = clk_get(&pdev->dev, clk_name); 271 if (IS_ERR(clk)) { 272 dev_err(&pdev->dev, "failed to get clk\n"); 273 return PTR_ERR(clk); 274 } 275 276 clk_enable(clk); 277 pdata->clk = clk; 278 279 if (pdata->phy_mode == FSL_USB2_PHY_UTMI_WIDE) { 280 u32 reg = 0; 281 282 if (pdata->invert_drvvbus) 283 reg |= GC_PPP; 284 285 if (pdata->invert_pwr_fault) 286 reg |= GC_PFP; 287 288 out_be32(pdata->regs + ISIPHYCTRL, PHYCTRL_PHYE | PHYCTRL_PXE); 289 out_be32(pdata->regs + USBGENCTRL, reg); 290 } 291 return 0; 292 } 293 294 static void fsl_usb2_mpc5121_exit(struct platform_device *pdev) 295 { 296 struct fsl_usb2_platform_data *pdata = pdev->dev.platform_data; 297 298 pdata->regs = NULL; 299 300 if (pdata->clk) { 301 clk_disable(pdata->clk); 302 clk_put(pdata->clk); 303 } 304 } 305 306 static struct fsl_usb2_platform_data fsl_usb2_mpc5121_pd = { 307 .big_endian_desc = 1, 308 .big_endian_mmio = 1, 309 .es = 1, 310 .have_sysif_regs = 0, 311 .le_setup_buf = 1, 312 .init = fsl_usb2_mpc5121_init, 313 .exit = fsl_usb2_mpc5121_exit, 314 }; 315 #endif /* CONFIG_PPC_MPC512x */ 316 317 static struct fsl_usb2_platform_data fsl_usb2_mpc8xxx_pd = { 318 .have_sysif_regs = 1, 319 }; 320 321 static const struct of_device_id fsl_usb2_mph_dr_of_match[] = { 322 { .compatible = "fsl-usb2-mph", .data = &fsl_usb2_mpc8xxx_pd, }, 323 { .compatible = "fsl-usb2-dr", .data = &fsl_usb2_mpc8xxx_pd, }, 324 #ifdef CONFIG_PPC_MPC512x 325 { .compatible = "fsl,mpc5121-usb2-dr", .data = &fsl_usb2_mpc5121_pd, }, 326 #endif 327 {}, 328 }; 329 330 static struct platform_driver fsl_usb2_mph_dr_driver = { 331 .driver = { 332 .name = "fsl-usb2-mph-dr", 333 .owner = THIS_MODULE, 334 .of_match_table = fsl_usb2_mph_dr_of_match, 335 }, 336 .probe = fsl_usb2_mph_dr_of_probe, 337 .remove = __devexit_p(fsl_usb2_mph_dr_of_remove), 338 }; 339 340 module_platform_driver(fsl_usb2_mph_dr_driver); 341 342 MODULE_DESCRIPTION("FSL MPH DR OF devices driver"); 343 MODULE_AUTHOR("Anatolij Gustschin <agust@denx.de>"); 344 MODULE_LICENSE("GPL"); 345