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 #include <linux/dma-mapping.h>
  21
  22 struct fsl_usb2_dev_data {
  23         char *dr_mode;          /* controller mode */
  24         char *drivers[3];       /* drivers to instantiate for this mode */
  25         enum fsl_usb2_operating_modes op_mode;  /* operating mode */
  26 };
  27
  28 static struct fsl_usb2_dev_data dr_mode_data[] = {
  29         {
  30                 .dr_mode = "host",
  31                 .drivers = { "fsl-ehci", NULL, NULL, },
  32                 .op_mode = FSL_USB2_DR_HOST,
  33         },
  34         {
  35                 .dr_mode = "otg",
  36                 .drivers = { "fsl-usb2-otg", "fsl-ehci", "fsl-usb2-udc", },
  37                 .op_mode = FSL_USB2_DR_OTG,
  38         },
  39         {
  40                 .dr_mode = "peripheral",
  41                 .drivers = { "fsl-usb2-udc", NULL, NULL, },
  42                 .op_mode = FSL_USB2_DR_DEVICE,
  43         },
  44 };
  45
  46 static struct fsl_usb2_dev_data *get_dr_mode_data(struct device_node *np)
  47 {
  48         const unsigned char *prop;
  49         int i;
  50
  51         prop = of_get_property(np, "dr_mode", NULL);
  52         if (prop) {
  53                 for (i = 0; i < ARRAY_SIZE(dr_mode_data); i++) {
  54                         if (!strcmp(prop, dr_mode_data[i].dr_mode))
  55                                 return &dr_mode_data[i];
  56                 }
  57         }
  58         pr_warn("%s: Invalid 'dr_mode' property, fallback to host mode\n",
  59                 np->full_name);
  60         return &dr_mode_data[0]; /* mode not specified, use host */
  61 }
  62
  63 static enum fsl_usb2_phy_modes determine_usb_phy(const char *phy_type)
  64 {
  65         if (!phy_type)
  66                 return FSL_USB2_PHY_NONE;
  67         if (!strcasecmp(phy_type, "ulpi"))
  68                 return FSL_USB2_PHY_ULPI;
  69         if (!strcasecmp(phy_type, "utmi"))
  70                 return FSL_USB2_PHY_UTMI;
  71         if (!strcasecmp(phy_type, "utmi_wide"))
  72                 return FSL_USB2_PHY_UTMI_WIDE;
  73         if (!strcasecmp(phy_type, "utmi_dual"))
  74                 return FSL_USB2_PHY_UTMI_DUAL;
  75         if (!strcasecmp(phy_type, "serial"))
  76                 return FSL_USB2_PHY_SERIAL;
  77
  78         return FSL_USB2_PHY_NONE;
  79 }
  80
  81 static struct platform_device *fsl_usb2_device_register(
  82                                         struct platform_device *ofdev,
  83                                         struct fsl_usb2_platform_data *pdata,
  84                                         const char *name, int id)
  85 {
  86         struct platform_device *pdev;
  87         const struct resource *res = ofdev->resource;
  88         unsigned int num = ofdev->num_resources;
  89         int retval;
  90
  91         pdev = platform_device_alloc(name, id);
  92         if (!pdev) {
  93                 retval = -ENOMEM;
  94                 goto error;
  95         }
  96
  97         pdev->dev.parent = &ofdev->dev;
  98
  99         pdev->dev.coherent_dma_mask = ofdev->dev.coherent_dma_mask;
 100
 101         if (!pdev->dev.dma_mask)
 102                 pdev->dev.dma_mask = &ofdev->dev.coherent_dma_mask;
 103         else
 104                 dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
 105
 106         retval = platform_device_add_data(pdev, pdata, sizeof(*pdata));
 107         if (retval)
 108                 goto error;
 109
 110         if (num) {
 111                 retval = platform_device_add_resources(pdev, res, num);
 112                 if (retval)
 113                         goto error;
 114         }
 115
 116         retval = platform_device_add(pdev);
 117         if (retval)
 118                 goto error;
 119
 120         return pdev;
 121
 122 error:
 123         platform_device_put(pdev);
 124         return ERR_PTR(retval);
 125 }
 126
 127 static const struct of_device_id fsl_usb2_mph_dr_of_match[];
 128
 129 static enum fsl_usb2_controller_ver usb_get_ver_info(struct device_node *np)
 130 {
 131         enum fsl_usb2_controller_ver ver = FSL_USB_VER_NONE;
 132
 133         /*
 134          * returns 1 for usb controller version 1.6
 135          * returns 2 for usb controller version 2.2
 136          * returns 3 for usb controller version 2.4
 137          * returns 4 for usb controller version 2.5
 138          * returns 0 otherwise
 139          */
 140         if (of_device_is_compatible(np, "fsl-usb2-dr")) {
 141                 if (of_device_is_compatible(np, "fsl-usb2-dr-v1.6"))
 142                         ver = FSL_USB_VER_1_6;
 143                 else if (of_device_is_compatible(np, "fsl-usb2-dr-v2.2"))
 144                         ver = FSL_USB_VER_2_2;
 145                 else if (of_device_is_compatible(np, "fsl-usb2-dr-v2.4"))
 146                         ver = FSL_USB_VER_2_4;
 147                 else if (of_device_is_compatible(np, "fsl-usb2-dr-v2.5"))
 148                         ver = FSL_USB_VER_2_5;
 149                 else /* for previous controller versions */
 150                         ver = FSL_USB_VER_OLD;
 151
 152                 if (ver > FSL_USB_VER_NONE)
 153                         return ver;
 154         }
 155
 156         if (of_device_is_compatible(np, "fsl,mpc5121-usb2-dr"))
 157                 return FSL_USB_VER_OLD;
 158
 159         if (of_device_is_compatible(np, "fsl-usb2-mph")) {
 160                 if (of_device_is_compatible(np, "fsl-usb2-mph-v1.6"))
 161                         ver = FSL_USB_VER_1_6;
 162                 else if (of_device_is_compatible(np, "fsl-usb2-mph-v2.2"))
 163                         ver = FSL_USB_VER_2_2;
 164                 else if (of_device_is_compatible(np, "fsl-usb2-mph-v2.4"))
 165                         ver = FSL_USB_VER_2_4;
 166                 else if (of_device_is_compatible(np, "fsl-usb2-mph-v2.5"))
 167                         ver = FSL_USB_VER_2_5;
 168                 else /* for previous controller versions */
 169                         ver = FSL_USB_VER_OLD;
 170         }
 171
 172         return ver;
 173 }
 174
 175 static int fsl_usb2_mph_dr_of_probe(struct platform_device *ofdev)
 176 {
 177         struct device_node *np = ofdev->dev.of_node;
 178         struct platform_device *usb_dev;
 179         struct fsl_usb2_platform_data data, *pdata;
 180         struct fsl_usb2_dev_data *dev_data;
 181         const struct of_device_id *match;
 182         const unsigned char *prop;
 183         static unsigned int idx;
 184         int i;
 185
 186         if (!of_device_is_available(np))
 187                 return -ENODEV;
 188
 189         match = of_match_device(fsl_usb2_mph_dr_of_match, &ofdev->dev);
 190         if (!match)
 191                 return -ENODEV;
 192
 193         pdata = &data;
 194         if (match->data)
 195                 memcpy(pdata, match->data, sizeof(data));
 196         else
 197                 memset(pdata, 0, sizeof(data));
 198
 199         dev_data = get_dr_mode_data(np);
 200
 201         if (of_device_is_compatible(np, "fsl-usb2-mph")) {
 202                 if (of_get_property(np, "port0", NULL))
 203                         pdata->port_enables |= FSL_USB2_PORT0_ENABLED;
 204
 205                 if (of_get_property(np, "port1", NULL))
 206                         pdata->port_enables |= FSL_USB2_PORT1_ENABLED;
 207
 208                 pdata->operating_mode = FSL_USB2_MPH_HOST;
 209         } else {
 210                 if (of_get_property(np, "fsl,invert-drvvbus", NULL))
 211                         pdata->invert_drvvbus = 1;
 212
 213                 if (of_get_property(np, "fsl,invert-pwr-fault", NULL))
 214                         pdata->invert_pwr_fault = 1;
 215
 216                 /* setup mode selected in the device tree */
 217                 pdata->operating_mode = dev_data->op_mode;
 218         }
 219
 220         prop = of_get_property(np, "phy_type", NULL);
 221         pdata->phy_mode = determine_usb_phy(prop);
 222         pdata->controller_ver = usb_get_ver_info(np);
 223
 224         /* Activate Erratum by reading property in device tree */
 225         pdata->has_fsl_erratum_a007792 =
 226                 of_property_read_bool(np, "fsl,usb-erratum-a007792");
 227         pdata->has_fsl_erratum_a005275 =
 228                 of_property_read_bool(np, "fsl,usb-erratum-a005275");
 229
 230         /*
 231          * Determine whether phy_clk_valid needs to be checked
 232          * by reading property in device tree
 233          */
 234         pdata->check_phy_clk_valid =
 235                 of_property_read_bool(np, "phy-clk-valid");
 236
 237         if (pdata->have_sysif_regs) {
 238                 if (pdata->controller_ver == FSL_USB_VER_NONE) {
 239                         dev_warn(&ofdev->dev, "Could not get controller version\n");
 240                         return -ENODEV;
 241                 }
 242         }
 243
 244         for (i = 0; i < ARRAY_SIZE(dev_data->drivers); i++) {
 245                 if (!dev_data->drivers[i])
 246                         continue;
 247                 usb_dev = fsl_usb2_device_register(ofdev, pdata,
 248                                         dev_data->drivers[i], idx);
 249                 if (IS_ERR(usb_dev)) {
 250                         dev_err(&ofdev->dev, "Can't register usb device\n");
 251                         return PTR_ERR(usb_dev);
 252                 }
 253         }
 254         idx++;
 255         return 0;
 256 }
 257
 258 static int __unregister_subdev(struct device *dev, void *d)
 259 {
 260         platform_device_unregister(to_platform_device(dev));
 261         return 0;
 262 }
 263
 264 static int fsl_usb2_mph_dr_of_remove(struct platform_device *ofdev)
 265 {
 266         device_for_each_child(&ofdev->dev, NULL, __unregister_subdev);
 267         return 0;
 268 }
 269
 270 #ifdef CONFIG_PPC_MPC512x
 271
 272 #define USBGENCTRL              0x200           /* NOTE: big endian */
 273 #define GC_WU_INT_CLR           (1 << 5)        /* Wakeup int clear */
 274 #define GC_ULPI_SEL             (1 << 4)        /* ULPI i/f select (usb0 only)*/
 275 #define GC_PPP                  (1 << 3)        /* Inv. Port Power Polarity */
 276 #define GC_PFP                  (1 << 2)        /* Inv. Power Fault Polarity */
 277 #define GC_WU_ULPI_EN           (1 << 1)        /* Wakeup on ULPI event */
 278 #define GC_WU_IE                (1 << 1)        /* Wakeup interrupt enable */
 279
 280 #define ISIPHYCTRL              0x204           /* NOTE: big endian */
 281 #define PHYCTRL_PHYE            (1 << 4)        /* On-chip UTMI PHY enable */
 282 #define PHYCTRL_BSENH           (1 << 3)        /* Bit Stuff Enable High */
 283 #define PHYCTRL_BSEN            (1 << 2)        /* Bit Stuff Enable */
 284 #define PHYCTRL_LSFE            (1 << 1)        /* Line State Filter Enable */
 285 #define PHYCTRL_PXE             (1 << 0)        /* PHY oscillator enable */
 286
 287 int fsl_usb2_mpc5121_init(struct platform_device *pdev)
 288 {
 289         struct fsl_usb2_platform_data *pdata = dev_get_platdata(&pdev->dev);
 290         struct clk *clk;
 291         int err;
 292
 293         clk = devm_clk_get(pdev->dev.parent, "ipg");
 294         if (IS_ERR(clk)) {
 295                 dev_err(&pdev->dev, "failed to get clk\n");
 296                 return PTR_ERR(clk);
 297         }
 298         err = clk_prepare_enable(clk);
 299         if (err) {
 300                 dev_err(&pdev->dev, "failed to enable clk\n");
 301                 return err;
 302         }
 303         pdata->clk = clk;
 304
 305         if (pdata->phy_mode == FSL_USB2_PHY_UTMI_WIDE) {
 306                 u32 reg = 0;
 307
 308                 if (pdata->invert_drvvbus)
 309                         reg |= GC_PPP;
 310
 311                 if (pdata->invert_pwr_fault)
 312                         reg |= GC_PFP;
 313
 314                 out_be32(pdata->regs + ISIPHYCTRL, PHYCTRL_PHYE | PHYCTRL_PXE);
 315                 out_be32(pdata->regs + USBGENCTRL, reg);
 316         }
 317         return 0;
 318 }
 319
 320 static void fsl_usb2_mpc5121_exit(struct platform_device *pdev)
 321 {
 322         struct fsl_usb2_platform_data *pdata = dev_get_platdata(&pdev->dev);
 323
 324         pdata->regs = NULL;
 325
 326         if (pdata->clk)
 327                 clk_disable_unprepare(pdata->clk);
 328 }
 329
 330 static struct fsl_usb2_platform_data fsl_usb2_mpc5121_pd = {
 331         .big_endian_desc = 1,
 332         .big_endian_mmio = 1,
 333         .es = 1,
 334         .have_sysif_regs = 0,
 335         .le_setup_buf = 1,
 336         .init = fsl_usb2_mpc5121_init,
 337         .exit = fsl_usb2_mpc5121_exit,
 338 };
 339 #endif /* CONFIG_PPC_MPC512x */
 340
 341 static struct fsl_usb2_platform_data fsl_usb2_mpc8xxx_pd = {
 342         .have_sysif_regs = 1,
 343 };
 344
 345 static const struct of_device_id fsl_usb2_mph_dr_of_match[] = {
 346         { .compatible = "fsl-usb2-mph", .data = &fsl_usb2_mpc8xxx_pd, },
 347         { .compatible = "fsl-usb2-dr", .data = &fsl_usb2_mpc8xxx_pd, },
 348 #ifdef CONFIG_PPC_MPC512x
 349         { .compatible = "fsl,mpc5121-usb2-dr", .data = &fsl_usb2_mpc5121_pd, },
 350 #endif
 351         {},
 352 };
 353 MODULE_DEVICE_TABLE(of, fsl_usb2_mph_dr_of_match);
 354
 355 static struct platform_driver fsl_usb2_mph_dr_driver = {
 356         .driver = {
 357                 .name = "fsl-usb2-mph-dr",
 358                 .of_match_table = fsl_usb2_mph_dr_of_match,
 359         },
 360         .probe  = fsl_usb2_mph_dr_of_probe,
 361         .remove = fsl_usb2_mph_dr_of_remove,
 362 };
 363
 364 module_platform_driver(fsl_usb2_mph_dr_driver);
 365
 366 MODULE_DESCRIPTION("FSL MPH DR OF devices driver");
 367 MODULE_AUTHOR("Anatolij Gustschin <agust@denx.de>");
 368 MODULE_LICENSE("GPL");