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