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

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Setup platform devices needed by the Freescale multi-port host
   4  * and/or dual-role USB controller modules based on the description
   5  * in flat device tree.
   6  */
   7
   8 #include <linux/kernel.h>
   9 #include <linux/platform_device.h>
  10 #include <linux/fsl_devices.h>
  11 #include <linux/err.h>
  12 #include <linux/io.h>
  13 #include <linux/of_platform.h>
  14 #include <linux/clk.h>
  15 #include <linux/module.h>
  16 #include <linux/dma-mapping.h>
  17
  18 struct fsl_usb2_dev_data {
  19         char *dr_mode;          /* controller mode */
  20         char *drivers[3];       /* drivers to instantiate for this mode */
  21         enum fsl_usb2_operating_modes op_mode;  /* operating mode */
  22 };
  23
  24 static struct fsl_usb2_dev_data dr_mode_data[] = {
  25         {
  26                 .dr_mode = "host",
  27                 .drivers = { "fsl-ehci", NULL, NULL, },
  28                 .op_mode = FSL_USB2_DR_HOST,
  29         },
  30         {
  31                 .dr_mode = "otg",
  32                 .drivers = { "fsl-usb2-otg", "fsl-ehci", "fsl-usb2-udc", },
  33                 .op_mode = FSL_USB2_DR_OTG,
  34         },
  35         {
  36                 .dr_mode = "peripheral",
  37                 .drivers = { "fsl-usb2-udc", NULL, NULL, },
  38                 .op_mode = FSL_USB2_DR_DEVICE,
  39         },
  40 };
  41
  42 static struct fsl_usb2_dev_data *get_dr_mode_data(struct device_node *np)
  43 {
  44         const unsigned char *prop;
  45         int i;
  46
  47         prop = of_get_property(np, "dr_mode", NULL);
  48         if (prop) {
  49                 for (i = 0; i < ARRAY_SIZE(dr_mode_data); i++) {
  50                         if (!strcmp(prop, dr_mode_data[i].dr_mode))
  51                                 return &dr_mode_data[i];
  52                 }
  53         }
  54         pr_warn("%pOF: Invalid 'dr_mode' property, fallback to host mode\n",
  55                 np);
  56         return &dr_mode_data[0]; /* mode not specified, use host */
  57 }
  58
  59 static enum fsl_usb2_phy_modes determine_usb_phy(const char *phy_type)
  60 {
  61         if (!phy_type)
  62                 return FSL_USB2_PHY_NONE;
  63         if (!strcasecmp(phy_type, "ulpi"))
  64                 return FSL_USB2_PHY_ULPI;
  65         if (!strcasecmp(phy_type, "utmi"))
  66                 return FSL_USB2_PHY_UTMI;
  67         if (!strcasecmp(phy_type, "utmi_wide"))
  68                 return FSL_USB2_PHY_UTMI_WIDE;
  69         if (!strcasecmp(phy_type, "utmi_dual"))
  70                 return FSL_USB2_PHY_UTMI_DUAL;
  71         if (!strcasecmp(phy_type, "serial"))
  72                 return FSL_USB2_PHY_SERIAL;
  73
  74         return FSL_USB2_PHY_NONE;
  75 }
  76
  77 static struct platform_device *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
  97         if (!pdev->dev.dma_mask)
  98                 pdev->dev.dma_mask = &ofdev->dev.coherent_dma_mask;
  99         else
 100                 dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
 101
 102         retval = platform_device_add_data(pdev, pdata, sizeof(*pdata));
 103         if (retval)
 104                 goto error;
 105
 106         if (num) {
 107                 retval = platform_device_add_resources(pdev, res, num);
 108                 if (retval)
 109                         goto error;
 110         }
 111
 112         retval = platform_device_add(pdev);
 113         if (retval)
 114                 goto error;
 115
 116         return pdev;
 117
 118 error:
 119         platform_device_put(pdev);
 120         return ERR_PTR(retval);
 121 }
 122
 123 static const struct of_device_id fsl_usb2_mph_dr_of_match[];
 124
 125 static enum fsl_usb2_controller_ver usb_get_ver_info(struct device_node *np)
 126 {
 127         enum fsl_usb2_controller_ver ver = FSL_USB_VER_NONE;
 128
 129         /*
 130          * returns 1 for usb controller version 1.6
 131          * returns 2 for usb controller version 2.2
 132          * returns 3 for usb controller version 2.4
 133          * returns 4 for usb controller version 2.5
 134          * returns 0 otherwise
 135          */
 136         if (of_device_is_compatible(np, "fsl-usb2-dr")) {
 137                 if (of_device_is_compatible(np, "fsl-usb2-dr-v1.6"))
 138                         ver = FSL_USB_VER_1_6;
 139                 else if (of_device_is_compatible(np, "fsl-usb2-dr-v2.2"))
 140                         ver = FSL_USB_VER_2_2;
 141                 else if (of_device_is_compatible(np, "fsl-usb2-dr-v2.4"))
 142                         ver = FSL_USB_VER_2_4;
 143                 else if (of_device_is_compatible(np, "fsl-usb2-dr-v2.5"))
 144                         ver = FSL_USB_VER_2_5;
 145                 else /* for previous controller versions */
 146                         ver = FSL_USB_VER_OLD;
 147
 148                 if (ver > FSL_USB_VER_NONE)
 149                         return ver;
 150         }
 151
 152         if (of_device_is_compatible(np, "fsl,mpc5121-usb2-dr"))
 153                 return FSL_USB_VER_OLD;
 154
 155         if (of_device_is_compatible(np, "fsl-usb2-mph")) {
 156                 if (of_device_is_compatible(np, "fsl-usb2-mph-v1.6"))
 157                         ver = FSL_USB_VER_1_6;
 158                 else if (of_device_is_compatible(np, "fsl-usb2-mph-v2.2"))
 159                         ver = FSL_USB_VER_2_2;
 160                 else if (of_device_is_compatible(np, "fsl-usb2-mph-v2.4"))
 161                         ver = FSL_USB_VER_2_4;
 162                 else if (of_device_is_compatible(np, "fsl-usb2-mph-v2.5"))
 163                         ver = FSL_USB_VER_2_5;
 164                 else /* for previous controller versions */
 165                         ver = FSL_USB_VER_OLD;
 166         }
 167
 168         return ver;
 169 }
 170
 171 static int fsl_usb2_mph_dr_of_probe(struct platform_device *ofdev)
 172 {
 173         struct device_node *np = ofdev->dev.of_node;
 174         struct platform_device *usb_dev;
 175         struct fsl_usb2_platform_data data, *pdata;
 176         struct fsl_usb2_dev_data *dev_data;
 177         const struct of_device_id *match;
 178         const unsigned char *prop;
 179         static unsigned int idx;
 180         int i;
 181
 182         if (!of_device_is_available(np))
 183                 return -ENODEV;
 184
 185         match = of_match_device(fsl_usb2_mph_dr_of_match, &ofdev->dev);
 186         if (!match)
 187                 return -ENODEV;
 188
 189         pdata = &data;
 190         if (match->data)
 191                 memcpy(pdata, match->data, sizeof(data));
 192         else
 193                 memset(pdata, 0, sizeof(data));
 194
 195         dev_data = get_dr_mode_data(np);
 196
 197         if (of_device_is_compatible(np, "fsl-usb2-mph")) {
 198                 if (of_get_property(np, "port0", NULL))
 199                         pdata->port_enables |= FSL_USB2_PORT0_ENABLED;
 200
 201                 if (of_get_property(np, "port1", NULL))
 202                         pdata->port_enables |= FSL_USB2_PORT1_ENABLED;
 203
 204                 pdata->operating_mode = FSL_USB2_MPH_HOST;
 205         } else {
 206                 if (of_get_property(np, "fsl,invert-drvvbus", NULL))
 207                         pdata->invert_drvvbus = 1;
 208
 209                 if (of_get_property(np, "fsl,invert-pwr-fault", NULL))
 210                         pdata->invert_pwr_fault = 1;
 211
 212                 /* setup mode selected in the device tree */
 213                 pdata->operating_mode = dev_data->op_mode;
 214         }
 215
 216         prop = of_get_property(np, "phy_type", NULL);
 217         pdata->phy_mode = determine_usb_phy(prop);
 218         pdata->controller_ver = usb_get_ver_info(np);
 219
 220         /* Activate Erratum by reading property in device tree */
 221         pdata->has_fsl_erratum_a007792 =
 222                 of_property_read_bool(np, "fsl,usb-erratum-a007792");
 223         pdata->has_fsl_erratum_a005275 =
 224                 of_property_read_bool(np, "fsl,usb-erratum-a005275");
 225         pdata->has_fsl_erratum_a005697 =
 226                 of_property_read_bool(np, "fsl,usb_erratum-a005697");
 227
 228         /*
 229          * Determine whether phy_clk_valid needs to be checked
 230          * by reading property in device tree
 231          */
 232         pdata->check_phy_clk_valid =
 233                 of_property_read_bool(np, "phy-clk-valid");
 234
 235         if (pdata->have_sysif_regs) {
 236                 if (pdata->controller_ver == FSL_USB_VER_NONE) {
 237                         dev_warn(&ofdev->dev, "Could not get controller version\n");
 238                         return -ENODEV;
 239                 }
 240         }
 241
 242         for (i = 0; i < ARRAY_SIZE(dev_data->drivers); i++) {
 243                 if (!dev_data->drivers[i])
 244                         continue;
 245                 usb_dev = fsl_usb2_device_register(ofdev, pdata,
 246                                         dev_data->drivers[i], idx);
 247                 if (IS_ERR(usb_dev)) {
 248                         dev_err(&ofdev->dev, "Can't register usb device\n");
 249                         return PTR_ERR(usb_dev);
 250                 }
 251         }
 252         idx++;
 253         return 0;
 254 }
 255
 256 static int __unregister_subdev(struct device *dev, void *d)
 257 {
 258         platform_device_unregister(to_platform_device(dev));
 259         return 0;
 260 }
 261
 262 static int fsl_usb2_mph_dr_of_remove(struct platform_device *ofdev)
 263 {
 264         device_for_each_child(&ofdev->dev, NULL, __unregister_subdev);
 265         return 0;
 266 }
 267
 268 #ifdef CONFIG_PPC_MPC512x
 269
 270 #define USBGENCTRL              0x200           /* NOTE: big endian */
 271 #define GC_WU_INT_CLR           (1 << 5)        /* Wakeup int clear */
 272 #define GC_ULPI_SEL             (1 << 4)        /* ULPI i/f select (usb0 only)*/
 273 #define GC_PPP                  (1 << 3)        /* Inv. Port Power Polarity */
 274 #define GC_PFP                  (1 << 2)        /* Inv. Power Fault Polarity */
 275 #define GC_WU_ULPI_EN           (1 << 1)        /* Wakeup on ULPI event */
 276 #define GC_WU_IE                (1 << 1)        /* Wakeup interrupt enable */
 277
 278 #define ISIPHYCTRL              0x204           /* NOTE: big endian */
 279 #define PHYCTRL_PHYE            (1 << 4)        /* On-chip UTMI PHY enable */
 280 #define PHYCTRL_BSENH           (1 << 3)        /* Bit Stuff Enable High */
 281 #define PHYCTRL_BSEN            (1 << 2)        /* Bit Stuff Enable */
 282 #define PHYCTRL_LSFE            (1 << 1)        /* Line State Filter Enable */
 283 #define PHYCTRL_PXE             (1 << 0)        /* PHY oscillator enable */
 284
 285 int fsl_usb2_mpc5121_init(struct platform_device *pdev)
 286 {
 287         struct fsl_usb2_platform_data *pdata = dev_get_platdata(&pdev->dev);
 288         struct clk *clk;
 289         int err;
 290
 291         clk = devm_clk_get(pdev->dev.parent, "ipg");
 292         if (IS_ERR(clk)) {
 293                 dev_err(&pdev->dev, "failed to get clk\n");
 294                 return PTR_ERR(clk);
 295         }
 296         err = clk_prepare_enable(clk);
 297         if (err) {
 298                 dev_err(&pdev->dev, "failed to enable clk\n");
 299                 return err;
 300         }
 301         pdata->clk = clk;
 302
 303         if (pdata->phy_mode == FSL_USB2_PHY_UTMI_WIDE) {
 304                 u32 reg = 0;
 305
 306                 if (pdata->invert_drvvbus)
 307                         reg |= GC_PPP;
 308
 309                 if (pdata->invert_pwr_fault)
 310                         reg |= GC_PFP;
 311
 312                 out_be32(pdata->regs + ISIPHYCTRL, PHYCTRL_PHYE | PHYCTRL_PXE);
 313                 out_be32(pdata->regs + USBGENCTRL, reg);
 314         }
 315         return 0;
 316 }
 317
 318 static void fsl_usb2_mpc5121_exit(struct platform_device *pdev)
 319 {
 320         struct fsl_usb2_platform_data *pdata = dev_get_platdata(&pdev->dev);
 321
 322         pdata->regs = NULL;
 323
 324         if (pdata->clk)
 325                 clk_disable_unprepare(pdata->clk);
 326 }
 327
 328 static struct fsl_usb2_platform_data fsl_usb2_mpc5121_pd = {
 329         .big_endian_desc = 1,
 330         .big_endian_mmio = 1,
 331         .es = 1,
 332         .have_sysif_regs = 0,
 333         .le_setup_buf = 1,
 334         .init = fsl_usb2_mpc5121_init,
 335         .exit = fsl_usb2_mpc5121_exit,
 336 };
 337 #endif /* CONFIG_PPC_MPC512x */
 338
 339 static struct fsl_usb2_platform_data fsl_usb2_mpc8xxx_pd = {
 340         .have_sysif_regs = 1,
 341 };
 342
 343 static const struct of_device_id fsl_usb2_mph_dr_of_match[] = {
 344         { .compatible = "fsl-usb2-mph", .data = &fsl_usb2_mpc8xxx_pd, },
 345         { .compatible = "fsl-usb2-dr", .data = &fsl_usb2_mpc8xxx_pd, },
 346 #ifdef CONFIG_PPC_MPC512x
 347         { .compatible = "fsl,mpc5121-usb2-dr", .data = &fsl_usb2_mpc5121_pd, },
 348 #endif
 349         {},
 350 };
 351 MODULE_DEVICE_TABLE(of, fsl_usb2_mph_dr_of_match);
 352
 353 static struct platform_driver fsl_usb2_mph_dr_driver = {
 354         .driver = {
 355                 .name = "fsl-usb2-mph-dr",
 356                 .of_match_table = fsl_usb2_mph_dr_of_match,
 357         },
 358         .probe  = fsl_usb2_mph_dr_of_probe,
 359         .remove = fsl_usb2_mph_dr_of_remove,
 360 };
 361
 362 module_platform_driver(fsl_usb2_mph_dr_driver);
 363
 364 MODULE_DESCRIPTION("FSL MPH DR OF devices driver");
 365 MODULE_AUTHOR("Anatolij Gustschin <agust@denx.de>");
 366 MODULE_LICENSE("GPL");