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