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 struct fsl_usb2_dev_data dr_mode_data[] __devinitdata = {
  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 struct fsl_usb2_dev_data * __devinit 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 __devinit 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 struct platform_device * __devinit 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 = &pdev->archdata.dma_mask;
  98         *pdev->dev.dma_mask = *ofdev->dev.dma_mask;
  99
 100         retval = platform_device_add_data(pdev, pdata, sizeof(*pdata));
 101         if (retval)
 102                 goto error;
 103
 104         if (num) {
 105                 retval = platform_device_add_resources(pdev, res, num);
 106                 if (retval)
 107                         goto error;
 108         }
 109
 110         retval = platform_device_add(pdev);
 111         if (retval)
 112                 goto error;
 113
 114         return pdev;
 115
 116 error:
 117         platform_device_put(pdev);
 118         return ERR_PTR(retval);
 119 }
 120
 121 static const struct of_device_id fsl_usb2_mph_dr_of_match[];
 122
 123 static int __devinit fsl_usb2_mph_dr_of_probe(struct platform_device *ofdev)
 124 {
 125         struct device_node *np = ofdev->dev.of_node;
 126         struct platform_device *usb_dev;
 127         struct fsl_usb2_platform_data data, *pdata;
 128         struct fsl_usb2_dev_data *dev_data;
 129         const struct of_device_id *match;
 130         const unsigned char *prop;
 131         static unsigned int idx;
 132         int i;
 133
 134         if (!of_device_is_available(np))
 135                 return -ENODEV;
 136
 137         match = of_match_device(fsl_usb2_mph_dr_of_match, &ofdev->dev);
 138         if (!match)
 139                 return -ENODEV;
 140
 141         pdata = &data;
 142         if (match->data)
 143                 memcpy(pdata, match->data, sizeof(data));
 144         else
 145                 memset(pdata, 0, sizeof(data));
 146
 147         dev_data = get_dr_mode_data(np);
 148
 149         if (of_device_is_compatible(np, "fsl-usb2-mph")) {
 150                 if (of_get_property(np, "port0", NULL))
 151                         pdata->port_enables |= FSL_USB2_PORT0_ENABLED;
 152
 153                 if (of_get_property(np, "port1", NULL))
 154                         pdata->port_enables |= FSL_USB2_PORT1_ENABLED;
 155
 156                 pdata->operating_mode = FSL_USB2_MPH_HOST;
 157         } else {
 158                 if (of_get_property(np, "fsl,invert-drvvbus", NULL))
 159                         pdata->invert_drvvbus = 1;
 160
 161                 if (of_get_property(np, "fsl,invert-pwr-fault", NULL))
 162                         pdata->invert_pwr_fault = 1;
 163
 164                 /* setup mode selected in the device tree */
 165                 pdata->operating_mode = dev_data->op_mode;
 166         }
 167
 168         prop = of_get_property(np, "phy_type", NULL);
 169         pdata->phy_mode = determine_usb_phy(prop);
 170
 171         for (i = 0; i < ARRAY_SIZE(dev_data->drivers); i++) {
 172                 if (!dev_data->drivers[i])
 173                         continue;
 174                 usb_dev = fsl_usb2_device_register(ofdev, pdata,
 175                                         dev_data->drivers[i], idx);
 176                 if (IS_ERR(usb_dev)) {
 177                         dev_err(&ofdev->dev, "Can't register usb device\n");
 178                         return PTR_ERR(usb_dev);
 179                 }
 180         }
 181         idx++;
 182         return 0;
 183 }
 184
 185 static int __devexit __unregister_subdev(struct device *dev, void *d)
 186 {
 187         platform_device_unregister(to_platform_device(dev));
 188         return 0;
 189 }
 190
 191 static int __devexit fsl_usb2_mph_dr_of_remove(struct platform_device *ofdev)
 192 {
 193         device_for_each_child(&ofdev->dev, NULL, __unregister_subdev);
 194         return 0;
 195 }
 196
 197 #ifdef CONFIG_PPC_MPC512x
 198
 199 #define USBGENCTRL              0x200           /* NOTE: big endian */
 200 #define GC_WU_INT_CLR           (1 << 5)        /* Wakeup int clear */
 201 #define GC_ULPI_SEL             (1 << 4)        /* ULPI i/f select (usb0 only)*/
 202 #define GC_PPP                  (1 << 3)        /* Inv. Port Power Polarity */
 203 #define GC_PFP                  (1 << 2)        /* Inv. Power Fault Polarity */
 204 #define GC_WU_ULPI_EN           (1 << 1)        /* Wakeup on ULPI event */
 205 #define GC_WU_IE                (1 << 1)        /* Wakeup interrupt enable */
 206
 207 #define ISIPHYCTRL              0x204           /* NOTE: big endian */
 208 #define PHYCTRL_PHYE            (1 << 4)        /* On-chip UTMI PHY enable */
 209 #define PHYCTRL_BSENH           (1 << 3)        /* Bit Stuff Enable High */
 210 #define PHYCTRL_BSEN            (1 << 2)        /* Bit Stuff Enable */
 211 #define PHYCTRL_LSFE            (1 << 1)        /* Line State Filter Enable */
 212 #define PHYCTRL_PXE             (1 << 0)        /* PHY oscillator enable */
 213
 214 int fsl_usb2_mpc5121_init(struct platform_device *pdev)
 215 {
 216         struct fsl_usb2_platform_data *pdata = pdev->dev.platform_data;
 217         struct clk *clk;
 218         char clk_name[10];
 219         int base, clk_num;
 220
 221         base = pdev->resource->start & 0xf000;
 222         if (base == 0x3000)
 223                 clk_num = 1;
 224         else if (base == 0x4000)
 225                 clk_num = 2;
 226         else
 227                 return -ENODEV;
 228
 229         snprintf(clk_name, sizeof(clk_name), "usb%d_clk", clk_num);
 230         clk = clk_get(&pdev->dev, clk_name);
 231         if (IS_ERR(clk)) {
 232                 dev_err(&pdev->dev, "failed to get clk\n");
 233                 return PTR_ERR(clk);
 234         }
 235
 236         clk_enable(clk);
 237         pdata->clk = clk;
 238
 239         if (pdata->phy_mode == FSL_USB2_PHY_UTMI_WIDE) {
 240                 u32 reg = 0;
 241
 242                 if (pdata->invert_drvvbus)
 243                         reg |= GC_PPP;
 244
 245                 if (pdata->invert_pwr_fault)
 246                         reg |= GC_PFP;
 247
 248                 out_be32(pdata->regs + ISIPHYCTRL, PHYCTRL_PHYE | PHYCTRL_PXE);
 249                 out_be32(pdata->regs + USBGENCTRL, reg);
 250         }
 251         return 0;
 252 }
 253
 254 static void fsl_usb2_mpc5121_exit(struct platform_device *pdev)
 255 {
 256         struct fsl_usb2_platform_data *pdata = pdev->dev.platform_data;
 257
 258         pdata->regs = NULL;
 259
 260         if (pdata->clk) {
 261                 clk_disable(pdata->clk);
 262                 clk_put(pdata->clk);
 263         }
 264 }
 265
 266 static struct fsl_usb2_platform_data fsl_usb2_mpc5121_pd = {
 267         .big_endian_desc = 1,
 268         .big_endian_mmio = 1,
 269         .es = 1,
 270         .have_sysif_regs = 0,
 271         .le_setup_buf = 1,
 272         .init = fsl_usb2_mpc5121_init,
 273         .exit = fsl_usb2_mpc5121_exit,
 274 };
 275 #endif /* CONFIG_PPC_MPC512x */
 276
 277 static struct fsl_usb2_platform_data fsl_usb2_mpc8xxx_pd = {
 278         .have_sysif_regs = 1,
 279 };
 280
 281 static const struct of_device_id fsl_usb2_mph_dr_of_match[] = {
 282         { .compatible = "fsl-usb2-mph", .data = &fsl_usb2_mpc8xxx_pd, },
 283         { .compatible = "fsl-usb2-dr", .data = &fsl_usb2_mpc8xxx_pd, },
 284 #ifdef CONFIG_PPC_MPC512x
 285         { .compatible = "fsl,mpc5121-usb2-dr", .data = &fsl_usb2_mpc5121_pd, },
 286 #endif
 287         {},
 288 };
 289
 290 static struct platform_driver fsl_usb2_mph_dr_driver = {
 291         .driver = {
 292                 .name = "fsl-usb2-mph-dr",
 293                 .owner = THIS_MODULE,
 294                 .of_match_table = fsl_usb2_mph_dr_of_match,
 295         },
 296         .probe  = fsl_usb2_mph_dr_of_probe,
 297         .remove = __devexit_p(fsl_usb2_mph_dr_of_remove),
 298 };
 299
 300 module_platform_driver(fsl_usb2_mph_dr_driver);
 301
 302 MODULE_DESCRIPTION("FSL MPH DR OF devices driver");
 303 MODULE_AUTHOR("Anatolij Gustschin <agust@denx.de>");
 304 MODULE_LICENSE("GPL");