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