drivers/usb/host/fsl-mph-dr-of.c

   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, "utmi_dual"))
  73                 return FSL_USB2_PHY_UTMI_DUAL;
  74         if (!strcasecmp(phy_type, "serial"))
  75                 return FSL_USB2_PHY_SERIAL;
  76
  77         return FSL_USB2_PHY_NONE;
  78 }
  79
  80 static struct platform_device *fsl_usb2_device_register(
  81                                         struct platform_device *ofdev,
  82                                         struct fsl_usb2_platform_data *pdata,
  83                                         const char *name, int id)
  84 {
  85         struct platform_device *pdev;
  86         const struct resource *res = ofdev->resource;
  87         unsigned int num = ofdev->num_resources;
  88         int retval;
  89
  90         pdev = platform_device_alloc(name, id);
  91         if (!pdev) {
  92                 retval = -ENOMEM;
  93                 goto error;
  94         }
  95
  96         pdev->dev.parent = &ofdev->dev;
  97
  98         pdev->dev.coherent_dma_mask = ofdev->dev.coherent_dma_mask;
  99         *pdev->dev.dma_mask = *ofdev->dev.dma_mask;
 100
 101         retval = platform_device_add_data(pdev, pdata, sizeof(*pdata));
 102         if (retval)
 103                 goto error;
 104
 105         if (num) {
 106                 retval = platform_device_add_resources(pdev, res, num);
 107                 if (retval)
 108                         goto error;
 109         }
 110
 111         retval = platform_device_add(pdev);
 112         if (retval)
 113                 goto error;
 114
 115         return pdev;
 116
 117 error:
 118         platform_device_put(pdev);
 119         return ERR_PTR(retval);
 120 }
 121
 122 static const struct of_device_id fsl_usb2_mph_dr_of_match[];
 123
 124 static enum fsl_usb2_controller_ver usb_get_ver_info(struct device_node *np)
 125 {
 126         enum fsl_usb2_controller_ver ver = FSL_USB_VER_NONE;
 127
 128         /*
 129          * returns 1 for usb controller version 1.6
 130          * returns 2 for usb controller version 2.2
 131          * returns 3 for usb controller version 2.4
 132          * returns 4 for usb controller version 2.5
 133          * returns 0 otherwise
 134          */
 135         if (of_device_is_compatible(np, "fsl-usb2-dr")) {
 136                 if (of_device_is_compatible(np, "fsl-usb2-dr-v1.6"))
 137                         ver = FSL_USB_VER_1_6;
 138                 else if (of_device_is_compatible(np, "fsl-usb2-dr-v2.2"))
 139                         ver = FSL_USB_VER_2_2;
 140                 else if (of_device_is_compatible(np, "fsl-usb2-dr-v2.4"))
 141                         ver = FSL_USB_VER_2_4;
 142                 else if (of_device_is_compatible(np, "fsl-usb2-dr-v2.5"))
 143                         ver = FSL_USB_VER_2_5;
 144                 else /* for previous controller versions */
 145                         ver = FSL_USB_VER_OLD;
 146
 147                 if (ver > FSL_USB_VER_NONE)
 148                         return ver;
 149         }
 150
 151         if (of_device_is_compatible(np, "fsl,mpc5121-usb2-dr"))
 152                 return FSL_USB_VER_OLD;
 153
 154         if (of_device_is_compatible(np, "fsl-usb2-mph")) {
 155                 if (of_device_is_compatible(np, "fsl-usb2-mph-v1.6"))
 156                         ver = FSL_USB_VER_1_6;
 157                 else if (of_device_is_compatible(np, "fsl-usb2-mph-v2.2"))
 158                         ver = FSL_USB_VER_2_2;
 159                 else if (of_device_is_compatible(np, "fsl-usb2-mph-v2.4"))
 160                         ver = FSL_USB_VER_2_4;
 161                 else if (of_device_is_compatible(np, "fsl-usb2-mph-v2.5"))
 162                         ver = FSL_USB_VER_2_5;
 163                 else /* for previous controller versions */
 164                         ver = FSL_USB_VER_OLD;
 165         }
 166
 167         return ver;
 168 }
 169
 170 static int fsl_usb2_mph_dr_of_probe(struct platform_device *ofdev)
 171 {
 172         struct device_node *np = ofdev->dev.of_node;
 173         struct platform_device *usb_dev;
 174         struct fsl_usb2_platform_data data, *pdata;
 175         struct fsl_usb2_dev_data *dev_data;
 176         const struct of_device_id *match;
 177         const unsigned char *prop;
 178         static unsigned int idx;
 179         int i;
 180
 181         if (!of_device_is_available(np))
 182                 return -ENODEV;
 183
 184         match = of_match_device(fsl_usb2_mph_dr_of_match, &ofdev->dev);
 185         if (!match)
 186                 return -ENODEV;
 187
 188         pdata = &data;
 189         if (match->data)
 190                 memcpy(pdata, match->data, sizeof(data));
 191         else
 192                 memset(pdata, 0, sizeof(data));
 193
 194         dev_data = get_dr_mode_data(np);
 195
 196         if (of_device_is_compatible(np, "fsl-usb2-mph")) {
 197                 if (of_get_property(np, "port0", NULL))
 198                         pdata->port_enables |= FSL_USB2_PORT0_ENABLED;
 199
 200                 if (of_get_property(np, "port1", NULL))
 201                         pdata->port_enables |= FSL_USB2_PORT1_ENABLED;
 202
 203                 pdata->operating_mode = FSL_USB2_MPH_HOST;
 204         } else {
 205                 if (of_get_property(np, "fsl,invert-drvvbus", NULL))
 206                         pdata->invert_drvvbus = 1;
 207
 208                 if (of_get_property(np, "fsl,invert-pwr-fault", NULL))
 209                         pdata->invert_pwr_fault = 1;
 210
 211                 /* setup mode selected in the device tree */
 212                 pdata->operating_mode = dev_data->op_mode;
 213         }
 214
 215         prop = of_get_property(np, "phy_type", NULL);
 216         pdata->phy_mode = determine_usb_phy(prop);
 217         pdata->controller_ver = usb_get_ver_info(np);
 218
 219         /* Activate Erratum by reading property in device tree */
 220         if (of_get_property(np, "fsl,usb-erratum-a007792", NULL))
 221                 pdata->has_fsl_erratum_a007792 = 1;
 222         else
 223                 pdata->has_fsl_erratum_a007792 = 0;
 224         if (of_get_property(np, "fsl,usb-erratum-a005275", NULL))
 225                 pdata->has_fsl_erratum_a005275 = 1;
 226         else
 227                 pdata->has_fsl_erratum_a005275 = 0;
 228
 229         /*
 230          * Determine whether phy_clk_valid needs to be checked
 231          * by reading property in device tree
 232          */
 233         if (of_get_property(np, "phy-clk-valid", NULL))
 234                 pdata->check_phy_clk_valid = 1;
 235         else
 236                 pdata->check_phy_clk_valid = 0;
 237
 238         if (pdata->have_sysif_regs) {
 239                 if (pdata->controller_ver == FSL_USB_VER_NONE) {
 240                         dev_warn(&ofdev->dev, "Could not get controller version\n");
 241                         return -ENODEV;
 242                 }
 243         }
 244
 245         for (i = 0; i < ARRAY_SIZE(dev_data->drivers); i++) {
 246                 if (!dev_data->drivers[i])
 247                         continue;
 248                 usb_dev = fsl_usb2_device_register(ofdev, pdata,
 249                                         dev_data->drivers[i], idx);
 250                 if (IS_ERR(usb_dev)) {
 251                         dev_err(&ofdev->dev, "Can't register usb device\n");
 252                         return PTR_ERR(usb_dev);
 253                 }
 254         }
 255         idx++;
 256         return 0;
 257 }
 258
 259 static int __unregister_subdev(struct device *dev, void *d)
 260 {
 261         platform_device_unregister(to_platform_device(dev));
 262         return 0;
 263 }
 264
 265 static int fsl_usb2_mph_dr_of_remove(struct platform_device *ofdev)
 266 {
 267         device_for_each_child(&ofdev->dev, NULL, __unregister_subdev);
 268         return 0;
 269 }
 270
 271 #ifdef CONFIG_PPC_MPC512x
 272
 273 #define USBGENCTRL              0x200           /* NOTE: big endian */
 274 #define GC_WU_INT_CLR           (1 << 5)        /* Wakeup int clear */
 275 #define GC_ULPI_SEL             (1 << 4)        /* ULPI i/f select (usb0 only)*/
 276 #define GC_PPP                  (1 << 3)        /* Inv. Port Power Polarity */
 277 #define GC_PFP                  (1 << 2)        /* Inv. Power Fault Polarity */
 278 #define GC_WU_ULPI_EN           (1 << 1)        /* Wakeup on ULPI event */
 279 #define GC_WU_IE                (1 << 1)        /* Wakeup interrupt enable */
 280
 281 #define ISIPHYCTRL              0x204           /* NOTE: big endian */
 282 #define PHYCTRL_PHYE            (1 << 4)        /* On-chip UTMI PHY enable */
 283 #define PHYCTRL_BSENH           (1 << 3)        /* Bit Stuff Enable High */
 284 #define PHYCTRL_BSEN            (1 << 2)        /* Bit Stuff Enable */
 285 #define PHYCTRL_LSFE            (1 << 1)        /* Line State Filter Enable */
 286 #define PHYCTRL_PXE             (1 << 0)        /* PHY oscillator enable */
 287
 288 int fsl_usb2_mpc5121_init(struct platform_device *pdev)
 289 {
 290         struct fsl_usb2_platform_data *pdata = dev_get_platdata(&pdev->dev);
 291         struct clk *clk;
 292         int err;
 293
 294         clk = devm_clk_get(pdev->dev.parent, "ipg");
 295         if (IS_ERR(clk)) {
 296                 dev_err(&pdev->dev, "failed to get clk\n");
 297                 return PTR_ERR(clk);
 298         }
 299         err = clk_prepare_enable(clk);
 300         if (err) {
 301                 dev_err(&pdev->dev, "failed to enable clk\n");
 302                 return err;
 303         }
 304         pdata->clk = clk;
 305
 306         if (pdata->phy_mode == FSL_USB2_PHY_UTMI_WIDE) {
 307                 u32 reg = 0;
 308
 309                 if (pdata->invert_drvvbus)
 310                         reg |= GC_PPP;
 311
 312                 if (pdata->invert_pwr_fault)
 313                         reg |= GC_PFP;
 314
 315                 out_be32(pdata->regs + ISIPHYCTRL, PHYCTRL_PHYE | PHYCTRL_PXE);
 316                 out_be32(pdata->regs + USBGENCTRL, reg);
 317         }
 318         return 0;
 319 }
 320
 321 static void fsl_usb2_mpc5121_exit(struct platform_device *pdev)
 322 {
 323         struct fsl_usb2_platform_data *pdata = dev_get_platdata(&pdev->dev);
 324
 325         pdata->regs = NULL;
 326
 327         if (pdata->clk)
 328                 clk_disable_unprepare(pdata->clk);
 329 }
 330
 331 static struct fsl_usb2_platform_data fsl_usb2_mpc5121_pd = {
 332         .big_endian_desc = 1,
 333         .big_endian_mmio = 1,
 334         .es = 1,
 335         .have_sysif_regs = 0,
 336         .le_setup_buf = 1,
 337         .init = fsl_usb2_mpc5121_init,
 338         .exit = fsl_usb2_mpc5121_exit,
 339 };
 340 #endif /* CONFIG_PPC_MPC512x */
 341
 342 static struct fsl_usb2_platform_data fsl_usb2_mpc8xxx_pd = {
 343         .have_sysif_regs = 1,
 344 };
 345
 346 static const struct of_device_id fsl_usb2_mph_dr_of_match[] = {
 347         { .compatible = "fsl-usb2-mph", .data = &fsl_usb2_mpc8xxx_pd, },
 348         { .compatible = "fsl-usb2-dr", .data = &fsl_usb2_mpc8xxx_pd, },
 349 #ifdef CONFIG_PPC_MPC512x
 350         { .compatible = "fsl,mpc5121-usb2-dr", .data = &fsl_usb2_mpc5121_pd, },
 351 #endif
 352         {},
 353 };
 354 MODULE_DEVICE_TABLE(of, fsl_usb2_mph_dr_of_match);
 355
 356 static struct platform_driver fsl_usb2_mph_dr_driver = {
 357         .driver = {
 358                 .name = "fsl-usb2-mph-dr",
 359                 .of_match_table = fsl_usb2_mph_dr_of_match,
 360         },
 361         .probe  = fsl_usb2_mph_dr_of_probe,
 362         .remove = fsl_usb2_mph_dr_of_remove,
 363 };
 364
 365 module_platform_driver(fsl_usb2_mph_dr_driver);
 366
 367 MODULE_DESCRIPTION("FSL MPH DR OF devices driver");
 368 MODULE_AUTHOR("Anatolij Gustschin <agust@denx.de>");
 369 MODULE_LICENSE("GPL");