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
  20 struct fsl_usb2_dev_data {
  21         char *dr_mode;          /* controller mode */
  22         char *drivers[3];       /* drivers to instantiate for this mode */
  23         enum fsl_usb2_operating_modes op_mode;  /* operating mode */
  24 };
  25
  26 struct fsl_usb2_dev_data dr_mode_data[] __devinitdata = {
  27         {
  28                 .dr_mode = "host",
  29                 .drivers = { "fsl-ehci", NULL, NULL, },
  30                 .op_mode = FSL_USB2_DR_HOST,
  31         },
  32         {
  33                 .dr_mode = "otg",
  34                 .drivers = { "fsl-usb2-otg", "fsl-ehci", "fsl-usb2-udc", },
  35                 .op_mode = FSL_USB2_DR_OTG,
  36         },
  37         {
  38                 .dr_mode = "peripheral",
  39                 .drivers = { "fsl-usb2-udc", NULL, NULL, },
  40                 .op_mode = FSL_USB2_DR_DEVICE,
  41         },
  42 };
  43
  44 struct fsl_usb2_dev_data * __devinit get_dr_mode_data(struct device_node *np)
  45 {
  46         const unsigned char *prop;
  47         int i;
  48
  49         prop = of_get_property(np, "dr_mode", NULL);
  50         if (prop) {
  51                 for (i = 0; i < ARRAY_SIZE(dr_mode_data); i++) {
  52                         if (!strcmp(prop, dr_mode_data[i].dr_mode))
  53                                 return &dr_mode_data[i];
  54                 }
  55         }
  56         pr_warn("%s: Invalid 'dr_mode' property, fallback to host mode\n",
  57                 np->full_name);
  58         return &dr_mode_data[0]; /* mode not specified, use host */
  59 }
  60
  61 static enum fsl_usb2_phy_modes __devinit determine_usb_phy(const char *phy_type)
  62 {
  63         if (!phy_type)
  64                 return FSL_USB2_PHY_NONE;
  65         if (!strcasecmp(phy_type, "ulpi"))
  66                 return FSL_USB2_PHY_ULPI;
  67         if (!strcasecmp(phy_type, "utmi"))
  68                 return FSL_USB2_PHY_UTMI;
  69         if (!strcasecmp(phy_type, "utmi_wide"))
  70                 return FSL_USB2_PHY_UTMI_WIDE;
  71         if (!strcasecmp(phy_type, "serial"))
  72                 return FSL_USB2_PHY_SERIAL;
  73
  74         return FSL_USB2_PHY_NONE;
  75 }
  76
  77 struct platform_device * __devinit 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         pdev->dev.dma_mask = &pdev->archdata.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 __devinit fsl_usb2_mph_dr_of_probe(struct platform_device *ofdev)
 123 {
 124         struct device_node *np = ofdev->dev.of_node;
 125         struct platform_device *usb_dev;
 126         struct fsl_usb2_platform_data data, *pdata;
 127         struct fsl_usb2_dev_data *dev_data;
 128         const struct of_device_id *match;
 129         const unsigned char *prop;
 130         static unsigned int idx;
 131         int i;
 132
 133         if (!of_device_is_available(np))
 134                 return -ENODEV;
 135
 136         match = of_match_device(fsl_usb2_mph_dr_of_match, &ofdev->dev);
 137         if (!match)
 138                 return -ENODEV;
 139
 140         pdata = &data;
 141         if (match->data)
 142                 memcpy(pdata, match->data, sizeof(data));
 143         else
 144                 memset(pdata, 0, sizeof(data));
 145
 146         dev_data = get_dr_mode_data(np);
 147
 148         if (of_device_is_compatible(np, "fsl-usb2-mph")) {
 149                 if (of_get_property(np, "port0", NULL))
 150                         pdata->port_enables |= FSL_USB2_PORT0_ENABLED;
 151
 152                 if (of_get_property(np, "port1", NULL))
 153                         pdata->port_enables |= FSL_USB2_PORT1_ENABLED;
 154
 155                 pdata->operating_mode = FSL_USB2_MPH_HOST;
 156         } else {
 157                 if (of_get_property(np, "fsl,invert-drvvbus", NULL))
 158                         pdata->invert_drvvbus = 1;
 159
 160                 if (of_get_property(np, "fsl,invert-pwr-fault", NULL))
 161                         pdata->invert_pwr_fault = 1;
 162
 163                 /* setup mode selected in the device tree */
 164                 pdata->operating_mode = dev_data->op_mode;
 165         }
 166
 167         prop = of_get_property(np, "phy_type", NULL);
 168         pdata->phy_mode = determine_usb_phy(prop);
 169
 170         for (i = 0; i < ARRAY_SIZE(dev_data->drivers); i++) {
 171                 if (!dev_data->drivers[i])
 172                         continue;
 173                 usb_dev = fsl_usb2_device_register(ofdev, pdata,
 174                                         dev_data->drivers[i], idx);
 175                 if (IS_ERR(usb_dev)) {
 176                         dev_err(&ofdev->dev, "Can't register usb device\n");
 177                         return PTR_ERR(usb_dev);
 178                 }
 179         }
 180         idx++;
 181         return 0;
 182 }
 183
 184 static int __devexit __unregister_subdev(struct device *dev, void *d)
 185 {
 186         platform_device_unregister(to_platform_device(dev));
 187         return 0;
 188 }
 189
 190 static int __devexit fsl_usb2_mph_dr_of_remove(struct platform_device *ofdev)
 191 {
 192         device_for_each_child(&ofdev->dev, NULL, __unregister_subdev);
 193         return 0;
 194 }
 195
 196 #ifdef CONFIG_PPC_MPC512x
 197
 198 #define USBGENCTRL              0x200           /* NOTE: big endian */
 199 #define GC_WU_INT_CLR           (1 << 5)        /* Wakeup int clear */
 200 #define GC_ULPI_SEL             (1 << 4)        /* ULPI i/f select (usb0 only)*/
 201 #define GC_PPP                  (1 << 3)        /* Inv. Port Power Polarity */
 202 #define GC_PFP                  (1 << 2)        /* Inv. Power Fault Polarity */
 203 #define GC_WU_ULPI_EN           (1 << 1)        /* Wakeup on ULPI event */
 204 #define GC_WU_IE                (1 << 1)        /* Wakeup interrupt enable */
 205
 206 #define ISIPHYCTRL              0x204           /* NOTE: big endian */
 207 #define PHYCTRL_PHYE            (1 << 4)        /* On-chip UTMI PHY enable */
 208 #define PHYCTRL_BSENH           (1 << 3)        /* Bit Stuff Enable High */
 209 #define PHYCTRL_BSEN            (1 << 2)        /* Bit Stuff Enable */
 210 #define PHYCTRL_LSFE            (1 << 1)        /* Line State Filter Enable */
 211 #define PHYCTRL_PXE             (1 << 0)        /* PHY oscillator enable */
 212
 213 int fsl_usb2_mpc5121_init(struct platform_device *pdev)
 214 {
 215         struct fsl_usb2_platform_data *pdata = pdev->dev.platform_data;
 216         struct clk *clk;
 217         char clk_name[10];
 218         int base, clk_num;
 219
 220         base = pdev->resource->start & 0xf000;
 221         if (base == 0x3000)
 222                 clk_num = 1;
 223         else if (base == 0x4000)
 224                 clk_num = 2;
 225         else
 226                 return -ENODEV;
 227
 228         snprintf(clk_name, sizeof(clk_name), "usb%d_clk", clk_num);
 229         clk = clk_get(&pdev->dev, clk_name);
 230         if (IS_ERR(clk)) {
 231                 dev_err(&pdev->dev, "failed to get clk\n");
 232                 return PTR_ERR(clk);
 233         }
 234
 235         clk_enable(clk);
 236         pdata->clk = clk;
 237
 238         if (pdata->phy_mode == FSL_USB2_PHY_UTMI_WIDE) {
 239                 u32 reg = 0;
 240
 241                 if (pdata->invert_drvvbus)
 242                         reg |= GC_PPP;
 243
 244                 if (pdata->invert_pwr_fault)
 245                         reg |= GC_PFP;
 246
 247                 out_be32(pdata->regs + ISIPHYCTRL, PHYCTRL_PHYE | PHYCTRL_PXE);
 248                 out_be32(pdata->regs + USBGENCTRL, reg);
 249         }
 250         return 0;
 251 }
 252
 253 static void fsl_usb2_mpc5121_exit(struct platform_device *pdev)
 254 {
 255         struct fsl_usb2_platform_data *pdata = pdev->dev.platform_data;
 256
 257         pdata->regs = NULL;
 258
 259         if (pdata->clk) {
 260                 clk_disable(pdata->clk);
 261                 clk_put(pdata->clk);
 262         }
 263 }
 264
 265 struct fsl_usb2_platform_data fsl_usb2_mpc5121_pd = {
 266         .big_endian_desc = 1,
 267         .big_endian_mmio = 1,
 268         .es = 1,
 269         .le_setup_buf = 1,
 270         .init = fsl_usb2_mpc5121_init,
 271         .exit = fsl_usb2_mpc5121_exit,
 272 };
 273 #endif /* CONFIG_PPC_MPC512x */
 274
 275 static const struct of_device_id fsl_usb2_mph_dr_of_match[] = {
 276         { .compatible = "fsl-usb2-mph", },
 277         { .compatible = "fsl-usb2-dr", },
 278 #ifdef CONFIG_PPC_MPC512x
 279         { .compatible = "fsl,mpc5121-usb2-dr", .data = &fsl_usb2_mpc5121_pd, },
 280 #endif
 281         {},
 282 };
 283
 284 static struct platform_driver fsl_usb2_mph_dr_driver = {
 285         .driver = {
 286                 .name = "fsl-usb2-mph-dr",
 287                 .owner = THIS_MODULE,
 288                 .of_match_table = fsl_usb2_mph_dr_of_match,
 289         },
 290         .probe  = fsl_usb2_mph_dr_of_probe,
 291         .remove = __devexit_p(fsl_usb2_mph_dr_of_remove),
 292 };
 293
 294 static int __init fsl_usb2_mph_dr_init(void)
 295 {
 296         return platform_driver_register(&fsl_usb2_mph_dr_driver);
 297 }
 298 module_init(fsl_usb2_mph_dr_init);
 299
 300 static void __exit fsl_usb2_mph_dr_exit(void)
 301 {
 302         platform_driver_unregister(&fsl_usb2_mph_dr_driver);
 303 }
 304 module_exit(fsl_usb2_mph_dr_exit);
 305
 306 MODULE_DESCRIPTION("FSL MPH DR OF devices driver");
 307 MODULE_AUTHOR("Anatolij Gustschin <agust@denx.de>");
 308 MODULE_LICENSE("GPL");