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 20 struct fsl_usb2_dev_data { 21 char *dr_mode; /* controller mode */ 22 char *drivers[3]; /* drivers to instantiate for this mode */ 23 enum fsl_usb2_operating_modes op_mode; /* operating mode */ 24 }; 25 26 struct fsl_usb2_dev_data dr_mode_data[] __devinitdata = { 27 { 28 .dr_mode = "host", 29 .drivers = { "fsl-ehci", NULL, NULL, }, 30 .op_mode = FSL_USB2_DR_HOST, 31 }, 32 { 33 .dr_mode = "otg", 34 .drivers = { "fsl-usb2-otg", "fsl-ehci", "fsl-usb2-udc", }, 35 .op_mode = FSL_USB2_DR_OTG, 36 }, 37 { 38 .dr_mode = "peripheral", 39 .drivers = { "fsl-usb2-udc", NULL, NULL, }, 40 .op_mode = FSL_USB2_DR_DEVICE, 41 }, 42 }; 43 44 struct fsl_usb2_dev_data * __devinit get_dr_mode_data(struct device_node *np) 45 { 46 const unsigned char *prop; 47 int i; 48 49 prop = of_get_property(np, "dr_mode", NULL); 50 if (prop) { 51 for (i = 0; i < ARRAY_SIZE(dr_mode_data); i++) { 52 if (!strcmp(prop, dr_mode_data[i].dr_mode)) 53 return &dr_mode_data[i]; 54 } 55 } 56 pr_warn("%s: Invalid 'dr_mode' property, fallback to host mode\n", 57 np->full_name); 58 return &dr_mode_data[0]; /* mode not specified, use host */ 59 } 60 61 static enum fsl_usb2_phy_modes __devinit determine_usb_phy(const char *phy_type) 62 { 63 if (!phy_type) 64 return FSL_USB2_PHY_NONE; 65 if (!strcasecmp(phy_type, "ulpi")) 66 return FSL_USB2_PHY_ULPI; 67 if (!strcasecmp(phy_type, "utmi")) 68 return FSL_USB2_PHY_UTMI; 69 if (!strcasecmp(phy_type, "utmi_wide")) 70 return FSL_USB2_PHY_UTMI_WIDE; 71 if (!strcasecmp(phy_type, "serial")) 72 return FSL_USB2_PHY_SERIAL; 73 74 return FSL_USB2_PHY_NONE; 75 } 76 77 struct platform_device * __devinit fsl_usb2_device_register( 78 struct platform_device *ofdev, 79 struct fsl_usb2_platform_data *pdata, 80 const char *name, int id) 81 { 82 struct platform_device *pdev; 83 const struct resource *res = ofdev->resource; 84 unsigned int num = ofdev->num_resources; 85 int retval; 86 87 pdev = platform_device_alloc(name, id); 88 if (!pdev) { 89 retval = -ENOMEM; 90 goto error; 91 } 92 93 pdev->dev.parent = &ofdev->dev; 94 95 pdev->dev.coherent_dma_mask = ofdev->dev.coherent_dma_mask; 96 pdev->dev.dma_mask = &pdev->archdata.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 __devinit fsl_usb2_mph_dr_of_probe(struct platform_device *ofdev) 123 { 124 struct device_node *np = ofdev->dev.of_node; 125 struct platform_device *usb_dev; 126 struct fsl_usb2_platform_data data, *pdata; 127 struct fsl_usb2_dev_data *dev_data; 128 const struct of_device_id *match; 129 const unsigned char *prop; 130 static unsigned int idx; 131 int i; 132 133 if (!of_device_is_available(np)) 134 return -ENODEV; 135 136 match = of_match_device(fsl_usb2_mph_dr_of_match, &ofdev->dev); 137 if (!match) 138 return -ENODEV; 139 140 pdata = &data; 141 if (match->data) 142 memcpy(pdata, match->data, sizeof(data)); 143 else 144 memset(pdata, 0, sizeof(data)); 145 146 dev_data = get_dr_mode_data(np); 147 148 if (of_device_is_compatible(np, "fsl-usb2-mph")) { 149 if (of_get_property(np, "port0", NULL)) 150 pdata->port_enables |= FSL_USB2_PORT0_ENABLED; 151 152 if (of_get_property(np, "port1", NULL)) 153 pdata->port_enables |= FSL_USB2_PORT1_ENABLED; 154 155 pdata->operating_mode = FSL_USB2_MPH_HOST; 156 } else { 157 if (of_get_property(np, "fsl,invert-drvvbus", NULL)) 158 pdata->invert_drvvbus = 1; 159 160 if (of_get_property(np, "fsl,invert-pwr-fault", NULL)) 161 pdata->invert_pwr_fault = 1; 162 163 /* setup mode selected in the device tree */ 164 pdata->operating_mode = dev_data->op_mode; 165 } 166 167 prop = of_get_property(np, "phy_type", NULL); 168 pdata->phy_mode = determine_usb_phy(prop); 169 170 for (i = 0; i < ARRAY_SIZE(dev_data->drivers); i++) { 171 if (!dev_data->drivers[i]) 172 continue; 173 usb_dev = fsl_usb2_device_register(ofdev, pdata, 174 dev_data->drivers[i], idx); 175 if (IS_ERR(usb_dev)) { 176 dev_err(&ofdev->dev, "Can't register usb device\n"); 177 return PTR_ERR(usb_dev); 178 } 179 } 180 idx++; 181 return 0; 182 } 183 184 static int __devexit __unregister_subdev(struct device *dev, void *d) 185 { 186 platform_device_unregister(to_platform_device(dev)); 187 return 0; 188 } 189 190 static int __devexit fsl_usb2_mph_dr_of_remove(struct platform_device *ofdev) 191 { 192 device_for_each_child(&ofdev->dev, NULL, __unregister_subdev); 193 return 0; 194 } 195 196 #ifdef CONFIG_PPC_MPC512x 197 198 #define USBGENCTRL 0x200 /* NOTE: big endian */ 199 #define GC_WU_INT_CLR (1 << 5) /* Wakeup int clear */ 200 #define GC_ULPI_SEL (1 << 4) /* ULPI i/f select (usb0 only)*/ 201 #define GC_PPP (1 << 3) /* Inv. Port Power Polarity */ 202 #define GC_PFP (1 << 2) /* Inv. Power Fault Polarity */ 203 #define GC_WU_ULPI_EN (1 << 1) /* Wakeup on ULPI event */ 204 #define GC_WU_IE (1 << 1) /* Wakeup interrupt enable */ 205 206 #define ISIPHYCTRL 0x204 /* NOTE: big endian */ 207 #define PHYCTRL_PHYE (1 << 4) /* On-chip UTMI PHY enable */ 208 #define PHYCTRL_BSENH (1 << 3) /* Bit Stuff Enable High */ 209 #define PHYCTRL_BSEN (1 << 2) /* Bit Stuff Enable */ 210 #define PHYCTRL_LSFE (1 << 1) /* Line State Filter Enable */ 211 #define PHYCTRL_PXE (1 << 0) /* PHY oscillator enable */ 212 213 int fsl_usb2_mpc5121_init(struct platform_device *pdev) 214 { 215 struct fsl_usb2_platform_data *pdata = pdev->dev.platform_data; 216 struct clk *clk; 217 char clk_name[10]; 218 int base, clk_num; 219 220 base = pdev->resource->start & 0xf000; 221 if (base == 0x3000) 222 clk_num = 1; 223 else if (base == 0x4000) 224 clk_num = 2; 225 else 226 return -ENODEV; 227 228 snprintf(clk_name, sizeof(clk_name), "usb%d_clk", clk_num); 229 clk = clk_get(&pdev->dev, clk_name); 230 if (IS_ERR(clk)) { 231 dev_err(&pdev->dev, "failed to get clk\n"); 232 return PTR_ERR(clk); 233 } 234 235 clk_enable(clk); 236 pdata->clk = clk; 237 238 if (pdata->phy_mode == FSL_USB2_PHY_UTMI_WIDE) { 239 u32 reg = 0; 240 241 if (pdata->invert_drvvbus) 242 reg |= GC_PPP; 243 244 if (pdata->invert_pwr_fault) 245 reg |= GC_PFP; 246 247 out_be32(pdata->regs + ISIPHYCTRL, PHYCTRL_PHYE | PHYCTRL_PXE); 248 out_be32(pdata->regs + USBGENCTRL, reg); 249 } 250 return 0; 251 } 252 253 static void fsl_usb2_mpc5121_exit(struct platform_device *pdev) 254 { 255 struct fsl_usb2_platform_data *pdata = pdev->dev.platform_data; 256 257 pdata->regs = NULL; 258 259 if (pdata->clk) { 260 clk_disable(pdata->clk); 261 clk_put(pdata->clk); 262 } 263 } 264 265 static struct fsl_usb2_platform_data fsl_usb2_mpc5121_pd = { 266 .big_endian_desc = 1, 267 .big_endian_mmio = 1, 268 .es = 1, 269 .have_sysif_regs = 0, 270 .le_setup_buf = 1, 271 .init = fsl_usb2_mpc5121_init, 272 .exit = fsl_usb2_mpc5121_exit, 273 }; 274 #endif /* CONFIG_PPC_MPC512x */ 275 276 static struct fsl_usb2_platform_data fsl_usb2_mpc8xxx_pd = { 277 .have_sysif_regs = 1, 278 }; 279 280 static const struct of_device_id fsl_usb2_mph_dr_of_match[] = { 281 { .compatible = "fsl-usb2-mph", .data = &fsl_usb2_mpc8xxx_pd, }, 282 { .compatible = "fsl-usb2-dr", .data = &fsl_usb2_mpc8xxx_pd, }, 283 #ifdef CONFIG_PPC_MPC512x 284 { .compatible = "fsl,mpc5121-usb2-dr", .data = &fsl_usb2_mpc5121_pd, }, 285 #endif 286 {}, 287 }; 288 289 static struct platform_driver fsl_usb2_mph_dr_driver = { 290 .driver = { 291 .name = "fsl-usb2-mph-dr", 292 .owner = THIS_MODULE, 293 .of_match_table = fsl_usb2_mph_dr_of_match, 294 }, 295 .probe = fsl_usb2_mph_dr_of_probe, 296 .remove = __devexit_p(fsl_usb2_mph_dr_of_remove), 297 }; 298 299 static int __init fsl_usb2_mph_dr_init(void) 300 { 301 return platform_driver_register(&fsl_usb2_mph_dr_driver); 302 } 303 module_init(fsl_usb2_mph_dr_init); 304 305 static void __exit fsl_usb2_mph_dr_exit(void) 306 { 307 platform_driver_unregister(&fsl_usb2_mph_dr_driver); 308 } 309 module_exit(fsl_usb2_mph_dr_exit); 310 311 MODULE_DESCRIPTION("FSL MPH DR OF devices driver"); 312 MODULE_AUTHOR("Anatolij Gustschin <agust@denx.de>"); 313 MODULE_LICENSE("GPL"); 314