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, "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         char clk_name[10];
 265         int base, clk_num;
 266
 267         base = pdev->resource->start & 0xf000;
 268         if (base == 0x3000)
 269                 clk_num = 1;
 270         else if (base == 0x4000)
 271                 clk_num = 2;
 272         else
 273                 return -ENODEV;
 274
 275         snprintf(clk_name, sizeof(clk_name), "usb%d_clk", clk_num);
 276         clk = devm_clk_get(pdev->dev.parent, clk_name);
 277         if (IS_ERR(clk)) {
 278                 dev_err(&pdev->dev, "failed to get clk\n");
 279                 return PTR_ERR(clk);
 280         }
 281         err = clk_prepare_enable(clk);
 282         if (err) {
 283                 dev_err(&pdev->dev, "failed to enable clk\n");
 284                 return err;
 285         }
 286         pdata->clk = clk;
 287
 288         if (pdata->phy_mode == FSL_USB2_PHY_UTMI_WIDE) {
 289                 u32 reg = 0;
 290
 291                 if (pdata->invert_drvvbus)
 292                         reg |= GC_PPP;
 293
 294                 if (pdata->invert_pwr_fault)
 295                         reg |= GC_PFP;
 296
 297                 out_be32(pdata->regs + ISIPHYCTRL, PHYCTRL_PHYE | PHYCTRL_PXE);
 298                 out_be32(pdata->regs + USBGENCTRL, reg);
 299         }
 300         return 0;
 301 }
 302
 303 static void fsl_usb2_mpc5121_exit(struct platform_device *pdev)
 304 {
 305         struct fsl_usb2_platform_data *pdata = dev_get_platdata(&pdev->dev);
 306
 307         pdata->regs = NULL;
 308
 309         if (pdata->clk)
 310                 clk_disable_unprepare(pdata->clk);
 311 }
 312
 313 static struct fsl_usb2_platform_data fsl_usb2_mpc5121_pd = {
 314         .big_endian_desc = 1,
 315         .big_endian_mmio = 1,
 316         .es = 1,
 317         .have_sysif_regs = 0,
 318         .le_setup_buf = 1,
 319         .init = fsl_usb2_mpc5121_init,
 320         .exit = fsl_usb2_mpc5121_exit,
 321 };
 322 #endif /* CONFIG_PPC_MPC512x */
 323
 324 static struct fsl_usb2_platform_data fsl_usb2_mpc8xxx_pd = {
 325         .have_sysif_regs = 1,
 326 };
 327
 328 static const struct of_device_id fsl_usb2_mph_dr_of_match[] = {
 329         { .compatible = "fsl-usb2-mph", .data = &fsl_usb2_mpc8xxx_pd, },
 330         { .compatible = "fsl-usb2-dr", .data = &fsl_usb2_mpc8xxx_pd, },
 331 #ifdef CONFIG_PPC_MPC512x
 332         { .compatible = "fsl,mpc5121-usb2-dr", .data = &fsl_usb2_mpc5121_pd, },
 333 #endif
 334         {},
 335 };
 336
 337 static struct platform_driver fsl_usb2_mph_dr_driver = {
 338         .driver = {
 339                 .name = "fsl-usb2-mph-dr",
 340                 .owner = THIS_MODULE,
 341                 .of_match_table = fsl_usb2_mph_dr_of_match,
 342         },
 343         .probe  = fsl_usb2_mph_dr_of_probe,
 344         .remove = fsl_usb2_mph_dr_of_remove,
 345 };
 346
 347 module_platform_driver(fsl_usb2_mph_dr_driver);
 348
 349 MODULE_DESCRIPTION("FSL MPH DR OF devices driver");
 350 MODULE_AUTHOR("Anatolij Gustschin <agust@denx.de>");
 351 MODULE_LICENSE("GPL");