drivers/usb/musb-new/ti-musb.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * MISC driver for TI MUSB Glue.
   4  *
   5  * (C) Copyright 2016
   6  *     Texas Instruments Incorporated, <www.ti.com>
   7  */
   8 #include <common.h>
   9 #include <command.h>
  10 #include <console.h>
  11 #include <dm.h>
  12 #include <log.h>
  13 #include <malloc.h>
  14 #include <linux/usb/otg.h>
  15 #include <dm/device-internal.h>
  16 #include <dm/lists.h>
  17
  18 #include <asm/io.h>
  19 #include <asm/omap_musb.h>
  20 #include "musb_uboot.h"
  21
  22 DECLARE_GLOBAL_DATA_PTR;
  23
  24 #if CONFIG_IS_ENABLED(DM_USB)
  25 /* USB 2.0 PHY Control */
  26 #define CM_PHY_PWRDN                    (1 << 0)
  27 #define CM_PHY_OTG_PWRDN                (1 << 1)
  28 #define OTGVDET_EN                      (1 << 19)
  29 #define OTGSESSENDEN                    (1 << 20)
  30
  31 #define AM335X_USB0_CTRL        0x0
  32 #define AM335X_USB1_CTRL        0x8
  33
  34 static void ti_musb_set_phy_power(struct udevice *dev, u8 on)
  35 {
  36         struct ti_musb_plat *plat = dev_get_plat(dev);
  37
  38         if (!plat->ctrl_mod_base)
  39                 return;
  40
  41         if (on) {
  42                 clrsetbits_le32(plat->ctrl_mod_base,
  43                                 CM_PHY_PWRDN | CM_PHY_OTG_PWRDN,
  44                                 OTGVDET_EN | OTGSESSENDEN);
  45         } else {
  46                 clrsetbits_le32(plat->ctrl_mod_base, 0,
  47                                 CM_PHY_PWRDN | CM_PHY_OTG_PWRDN);
  48         }
  49 }
  50
  51 #if CONFIG_IS_ENABLED(OF_CONTROL)
  52
  53 static int ti_musb_get_usb_index(int node)
  54 {
  55         const void *fdt = gd->fdt_blob;
  56         int i = 0;
  57         char path[64];
  58         const char *alias_path;
  59         char alias[16];
  60
  61         fdt_get_path(fdt, node, path, sizeof(path));
  62
  63         do {
  64                 snprintf(alias, sizeof(alias), "usb%d", i);
  65                 alias_path = fdt_get_alias(fdt, alias);
  66                 if (alias_path == NULL) {
  67                         debug("USB index not found\n");
  68                         return -ENOENT;
  69                 }
  70
  71                 if (!strcmp(path, alias_path))
  72                         return i;
  73
  74                 i++;
  75         } while (alias_path);
  76
  77         return -ENOENT;
  78 }
  79
  80 static int ti_musb_of_to_plat(struct udevice *dev)
  81 {
  82         struct ti_musb_plat *plat = dev_get_plat(dev);
  83         const void *fdt = gd->fdt_blob;
  84         int node = dev_of_offset(dev);
  85         int phys;
  86         int ctrl_mod;
  87         int usb_index;
  88         struct musb_hdrc_config *musb_config;
  89
  90         plat->base = (void *)devfdt_get_addr_index(dev, 1);
  91
  92         phys = fdtdec_lookup_phandle(fdt, node, "phys");
  93         ctrl_mod = fdtdec_lookup_phandle(fdt, phys, "ti,ctrl_mod");
  94         plat->ctrl_mod_base = (void *)fdtdec_get_addr(fdt, ctrl_mod, "reg");
  95         usb_index = ti_musb_get_usb_index(node);
  96         switch (usb_index) {
  97         case 1:
  98                 plat->ctrl_mod_base += AM335X_USB1_CTRL;
  99                 break;
 100         case 0:
 101                 plat->ctrl_mod_base += AM335X_USB0_CTRL;
 102                 break;
 103         default:
 104                 break;
 105         }
 106
 107         musb_config = malloc(sizeof(struct musb_hdrc_config));
 108         memset(musb_config, 0, sizeof(struct musb_hdrc_config));
 109
 110         musb_config->multipoint = fdtdec_get_int(fdt, node,
 111                                                  "mentor,multipoint", -1);
 112         if (musb_config->multipoint < 0) {
 113                 pr_err("MUSB multipoint DT entry missing\n");
 114                 return -ENOENT;
 115         }
 116
 117         musb_config->dyn_fifo = 1;
 118
 119         musb_config->num_eps = fdtdec_get_int(fdt, node, "mentor,num-eps",
 120                                               -1);
 121         if (musb_config->num_eps < 0) {
 122                 pr_err("MUSB num-eps DT entry missing\n");
 123                 return -ENOENT;
 124         }
 125
 126         musb_config->ram_bits = fdtdec_get_int(fdt, node, "mentor,ram-bits",
 127                                                -1);
 128         if (musb_config->ram_bits < 0) {
 129                 pr_err("MUSB ram-bits DT entry missing\n");
 130                 return -ENOENT;
 131         }
 132
 133         plat->plat.config = musb_config;
 134
 135         plat->plat.power = fdtdec_get_int(fdt, node, "mentor,power", -1);
 136         if (plat->plat.power < 0) {
 137                 pr_err("MUSB mentor,power DT entry missing\n");
 138                 return -ENOENT;
 139         }
 140
 141         plat->plat.platform_ops = &musb_dsps_ops;
 142
 143         return 0;
 144 }
 145 #endif
 146
 147 static int ti_musb_host_probe(struct udevice *dev)
 148 {
 149         struct musb_host_data *host = dev_get_priv(dev);
 150         struct ti_musb_plat *plat = dev_get_plat(dev);
 151         struct usb_bus_priv *priv = dev_get_uclass_priv(dev);
 152         int ret;
 153
 154         priv->desc_before_addr = true;
 155
 156         host->host = musb_init_controller(&plat->plat,
 157                                           NULL,
 158                                           plat->base);
 159         if (!host->host)
 160                 return -EIO;
 161
 162         ti_musb_set_phy_power(dev, 1);
 163         ret = musb_lowlevel_init(host);
 164
 165         return ret;
 166 }
 167
 168 static int ti_musb_host_remove(struct udevice *dev)
 169 {
 170         struct musb_host_data *host = dev_get_priv(dev);
 171
 172         musb_stop(host->host);
 173         ti_musb_set_phy_power(dev, 0);
 174
 175         return 0;
 176 }
 177
 178 #if CONFIG_IS_ENABLED(OF_CONTROL)
 179 static int ti_musb_host_of_to_plat(struct udevice *dev)
 180 {
 181         struct ti_musb_plat *plat = dev_get_plat(dev);
 182         const void *fdt = gd->fdt_blob;
 183         int node = dev_of_offset(dev);
 184         int ret;
 185
 186         ret = ti_musb_of_to_plat(dev);
 187         if (ret) {
 188                 pr_err("plat dt parse error\n");
 189                 return ret;
 190         }
 191
 192         plat->plat.mode = MUSB_HOST;
 193
 194         return 0;
 195 }
 196 #endif
 197
 198 U_BOOT_DRIVER(ti_musb_host) = {
 199         .name   = "ti-musb-host",
 200         .id     = UCLASS_USB,
 201 #if CONFIG_IS_ENABLED(OF_CONTROL)
 202         .of_to_plat = ti_musb_host_of_to_plat,
 203 #endif
 204         .probe = ti_musb_host_probe,
 205         .remove = ti_musb_host_remove,
 206         .ops    = &musb_usb_ops,
 207         .plat_auto      = sizeof(struct ti_musb_plat),
 208         .priv_auto      = sizeof(struct musb_host_data),
 209 };
 210
 211 #if CONFIG_IS_ENABLED(DM_USB_GADGET)
 212 struct ti_musb_peripheral {
 213         struct musb *periph;
 214 };
 215
 216 #if CONFIG_IS_ENABLED(OF_CONTROL)
 217 static int ti_musb_peripheral_of_to_plat(struct udevice *dev)
 218 {
 219         struct ti_musb_plat *plat = dev_get_plat(dev);
 220         const void *fdt = gd->fdt_blob;
 221         int node = dev_of_offset(dev);
 222         int ret;
 223
 224         ret = ti_musb_of_to_plat(dev);
 225         if (ret) {
 226                 pr_err("plat dt parse error\n");
 227                 return ret;
 228         }
 229         plat->plat.mode = MUSB_PERIPHERAL;
 230
 231         return 0;
 232 }
 233 #endif
 234
 235 int dm_usb_gadget_handle_interrupts(struct udevice *dev)
 236 {
 237         struct ti_musb_peripheral *priv = dev_get_priv(dev);
 238
 239         priv->periph->isr(0, priv->periph);
 240
 241         return 0;
 242 }
 243
 244 static int ti_musb_peripheral_probe(struct udevice *dev)
 245 {
 246         struct ti_musb_peripheral *priv = dev_get_priv(dev);
 247         struct ti_musb_plat *plat = dev_get_plat(dev);
 248         int ret;
 249
 250         priv->periph = musb_init_controller(&plat->plat,
 251                                             NULL,
 252                                             plat->base);
 253         if (!priv->periph)
 254                 return -EIO;
 255
 256         ti_musb_set_phy_power(dev, 1);
 257         musb_gadget_setup(priv->periph);
 258         return usb_add_gadget_udc((struct device *)dev, &priv->periph->g);
 259 }
 260
 261 static int ti_musb_peripheral_remove(struct udevice *dev)
 262 {
 263         struct ti_musb_peripheral *priv = dev_get_priv(dev);
 264
 265         usb_del_gadget_udc(&priv->periph->g);
 266         ti_musb_set_phy_power(dev, 0);
 267
 268         return 0;
 269 }
 270
 271 U_BOOT_DRIVER(ti_musb_peripheral) = {
 272         .name   = "ti-musb-peripheral",
 273         .id     = UCLASS_USB_GADGET_GENERIC,
 274 #if CONFIG_IS_ENABLED(OF_CONTROL)
 275         .of_to_plat = ti_musb_peripheral_of_to_plat,
 276 #endif
 277         .probe = ti_musb_peripheral_probe,
 278         .remove = ti_musb_peripheral_remove,
 279         .ops    = &musb_usb_ops,
 280         .plat_auto      = sizeof(struct ti_musb_plat),
 281         .priv_auto      = sizeof(struct ti_musb_peripheral),
 282         .flags = DM_FLAG_PRE_RELOC,
 283 };
 284 #endif
 285
 286 #if CONFIG_IS_ENABLED(OF_CONTROL)
 287 static int ti_musb_wrapper_bind(struct udevice *parent)
 288 {
 289         ofnode node;
 290         int ret;
 291
 292         ofnode_for_each_subnode(node, dev_ofnode(parent)) {
 293                 struct udevice *dev;
 294                 const char *name = ofnode_get_name(node);
 295                 enum usb_dr_mode dr_mode;
 296                 struct driver *drv;
 297
 298                 if (strncmp(name, "usb@", 4))
 299                         continue;
 300
 301                 dr_mode = usb_get_dr_mode(node);
 302                 switch (dr_mode) {
 303                 case USB_DR_MODE_PERIPHERAL:
 304                         /* Bind MUSB device */
 305                         ret = device_bind_driver_to_node(parent,
 306                                                          "ti-musb-peripheral",
 307                                                          name,
 308                                                          node,
 309                                                          &dev);
 310                         if (ret)
 311                                 pr_err("musb - not able to bind usb peripheral node\n");
 312                         break;
 313                 case USB_DR_MODE_HOST:
 314                         /* Bind MUSB host */
 315                         ret = device_bind_driver_to_node(parent,
 316                                                          "ti-musb-host",
 317                                                          name,
 318                                                          node,
 319                                                          &dev);
 320                         if (ret)
 321                                 pr_err("musb - not able to bind usb host node\n");
 322                         break;
 323                 default:
 324                         break;
 325                 };
 326         }
 327         return 0;
 328 }
 329
 330 static const struct udevice_id ti_musb_ids[] = {
 331         { .compatible = "ti,am33xx-usb" },
 332         { }
 333 };
 334
 335 U_BOOT_DRIVER(ti_musb_wrapper) = {
 336         .name   = "ti-musb-wrapper",
 337         .id     = UCLASS_MISC,
 338         .of_match = ti_musb_ids,
 339         .bind = ti_musb_wrapper_bind,
 340 };
 341 #endif /* CONFIG_IS_ENABLED(OF_CONTROL) */
 342
 343 #endif /* CONFIG_IS_ENABLED(DM_USB) */