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 = &pdev->archdata.dma_mask; 98 *pdev->dev.dma_mask = *ofdev->dev.dma_mask; 99 100 retval = platform_device_add_data(pdev, pdata, sizeof(*pdata)); 101 if (retval) 102 goto error; 103 104 if (num) { 105 retval = platform_device_add_resources(pdev, res, num); 106 if (retval) 107 goto error; 108 } 109 110 retval = platform_device_add(pdev); 111 if (retval) 112 goto error; 113 114 return pdev; 115 116 error: 117 platform_device_put(pdev); 118 return ERR_PTR(retval); 119 } 120 121 static const struct of_device_id fsl_usb2_mph_dr_of_match[]; 122 123 static int __devinit fsl_usb2_mph_dr_of_probe(struct platform_device *ofdev) 124 { 125 struct device_node *np = ofdev->dev.of_node; 126 struct platform_device *usb_dev; 127 struct fsl_usb2_platform_data data, *pdata; 128 struct fsl_usb2_dev_data *dev_data; 129 const struct of_device_id *match; 130 const unsigned char *prop; 131 static unsigned int idx; 132 int i; 133 134 if (!of_device_is_available(np)) 135 return -ENODEV; 136 137 match = of_match_device(fsl_usb2_mph_dr_of_match, &ofdev->dev); 138 if (!match) 139 return -ENODEV; 140 141 pdata = &data; 142 if (match->data) 143 memcpy(pdata, match->data, sizeof(data)); 144 else 145 memset(pdata, 0, sizeof(data)); 146 147 dev_data = get_dr_mode_data(np); 148 149 if (of_device_is_compatible(np, "fsl-usb2-mph")) { 150 if (of_get_property(np, "port0", NULL)) 151 pdata->port_enables |= FSL_USB2_PORT0_ENABLED; 152 153 if (of_get_property(np, "port1", NULL)) 154 pdata->port_enables |= FSL_USB2_PORT1_ENABLED; 155 156 pdata->operating_mode = FSL_USB2_MPH_HOST; 157 } else { 158 if (of_get_property(np, "fsl,invert-drvvbus", NULL)) 159 pdata->invert_drvvbus = 1; 160 161 if (of_get_property(np, "fsl,invert-pwr-fault", NULL)) 162 pdata->invert_pwr_fault = 1; 163 164 /* setup mode selected in the device tree */ 165 pdata->operating_mode = dev_data->op_mode; 166 } 167 168 prop = of_get_property(np, "phy_type", NULL); 169 pdata->phy_mode = determine_usb_phy(prop); 170 171 for (i = 0; i < ARRAY_SIZE(dev_data->drivers); i++) { 172 if (!dev_data->drivers[i]) 173 continue; 174 usb_dev = fsl_usb2_device_register(ofdev, pdata, 175 dev_data->drivers[i], idx); 176 if (IS_ERR(usb_dev)) { 177 dev_err(&ofdev->dev, "Can't register usb device\n"); 178 return PTR_ERR(usb_dev); 179 } 180 } 181 idx++; 182 return 0; 183 } 184 185 static int __devexit __unregister_subdev(struct device *dev, void *d) 186 { 187 platform_device_unregister(to_platform_device(dev)); 188 return 0; 189 } 190 191 static int __devexit fsl_usb2_mph_dr_of_remove(struct platform_device *ofdev) 192 { 193 device_for_each_child(&ofdev->dev, NULL, __unregister_subdev); 194 return 0; 195 } 196 197 #ifdef CONFIG_PPC_MPC512x 198 199 #define USBGENCTRL 0x200 /* NOTE: big endian */ 200 #define GC_WU_INT_CLR (1 << 5) /* Wakeup int clear */ 201 #define GC_ULPI_SEL (1 << 4) /* ULPI i/f select (usb0 only)*/ 202 #define GC_PPP (1 << 3) /* Inv. Port Power Polarity */ 203 #define GC_PFP (1 << 2) /* Inv. Power Fault Polarity */ 204 #define GC_WU_ULPI_EN (1 << 1) /* Wakeup on ULPI event */ 205 #define GC_WU_IE (1 << 1) /* Wakeup interrupt enable */ 206 207 #define ISIPHYCTRL 0x204 /* NOTE: big endian */ 208 #define PHYCTRL_PHYE (1 << 4) /* On-chip UTMI PHY enable */ 209 #define PHYCTRL_BSENH (1 << 3) /* Bit Stuff Enable High */ 210 #define PHYCTRL_BSEN (1 << 2) /* Bit Stuff Enable */ 211 #define PHYCTRL_LSFE (1 << 1) /* Line State Filter Enable */ 212 #define PHYCTRL_PXE (1 << 0) /* PHY oscillator enable */ 213 214 int fsl_usb2_mpc5121_init(struct platform_device *pdev) 215 { 216 struct fsl_usb2_platform_data *pdata = pdev->dev.platform_data; 217 struct clk *clk; 218 char clk_name[10]; 219 int base, clk_num; 220 221 base = pdev->resource->start & 0xf000; 222 if (base == 0x3000) 223 clk_num = 1; 224 else if (base == 0x4000) 225 clk_num = 2; 226 else 227 return -ENODEV; 228 229 snprintf(clk_name, sizeof(clk_name), "usb%d_clk", clk_num); 230 clk = clk_get(&pdev->dev, clk_name); 231 if (IS_ERR(clk)) { 232 dev_err(&pdev->dev, "failed to get clk\n"); 233 return PTR_ERR(clk); 234 } 235 236 clk_enable(clk); 237 pdata->clk = clk; 238 239 if (pdata->phy_mode == FSL_USB2_PHY_UTMI_WIDE) { 240 u32 reg = 0; 241 242 if (pdata->invert_drvvbus) 243 reg |= GC_PPP; 244 245 if (pdata->invert_pwr_fault) 246 reg |= GC_PFP; 247 248 out_be32(pdata->regs + ISIPHYCTRL, PHYCTRL_PHYE | PHYCTRL_PXE); 249 out_be32(pdata->regs + USBGENCTRL, reg); 250 } 251 return 0; 252 } 253 254 static void fsl_usb2_mpc5121_exit(struct platform_device *pdev) 255 { 256 struct fsl_usb2_platform_data *pdata = pdev->dev.platform_data; 257 258 pdata->regs = NULL; 259 260 if (pdata->clk) { 261 clk_disable(pdata->clk); 262 clk_put(pdata->clk); 263 } 264 } 265 266 static struct fsl_usb2_platform_data fsl_usb2_mpc5121_pd = { 267 .big_endian_desc = 1, 268 .big_endian_mmio = 1, 269 .es = 1, 270 .have_sysif_regs = 0, 271 .le_setup_buf = 1, 272 .init = fsl_usb2_mpc5121_init, 273 .exit = fsl_usb2_mpc5121_exit, 274 }; 275 #endif /* CONFIG_PPC_MPC512x */ 276 277 static struct fsl_usb2_platform_data fsl_usb2_mpc8xxx_pd = { 278 .have_sysif_regs = 1, 279 }; 280 281 static const struct of_device_id fsl_usb2_mph_dr_of_match[] = { 282 { .compatible = "fsl-usb2-mph", .data = &fsl_usb2_mpc8xxx_pd, }, 283 { .compatible = "fsl-usb2-dr", .data = &fsl_usb2_mpc8xxx_pd, }, 284 #ifdef CONFIG_PPC_MPC512x 285 { .compatible = "fsl,mpc5121-usb2-dr", .data = &fsl_usb2_mpc5121_pd, }, 286 #endif 287 {}, 288 }; 289 290 static struct platform_driver fsl_usb2_mph_dr_driver = { 291 .driver = { 292 .name = "fsl-usb2-mph-dr", 293 .owner = THIS_MODULE, 294 .of_match_table = fsl_usb2_mph_dr_of_match, 295 }, 296 .probe = fsl_usb2_mph_dr_of_probe, 297 .remove = __devexit_p(fsl_usb2_mph_dr_of_remove), 298 }; 299 300 module_platform_driver(fsl_usb2_mph_dr_driver); 301 302 MODULE_DESCRIPTION("FSL MPH DR OF devices driver"); 303 MODULE_AUTHOR("Anatolij Gustschin <agust@denx.de>"); 304 MODULE_LICENSE("GPL"); 305