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

   1 /*
   2  * MISC driver for TI MUSB Glue.
   3  *
   4  * (C) Copyright 2016
   5  *     Texas Instruments Incorporated, <www.ti.com>
   6  *
   7  * SPDX-License-Identifier:     GPL-2.0+
   8  */
   9 #include <common.h>
  10 #include <command.h>
  11 #include <console.h>
  12 #include <dm.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 #ifdef CONFIG_DM_USB
  24
  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_USB1_CTRL        0x8
  32
  33 struct ti_musb_platdata {
  34         void *base;
  35         void *ctrl_mod_base;
  36         struct musb_hdrc_platform_data plat;
  37         struct musb_hdrc_config musb_config;
  38         struct omap_musb_board_data otg_board_data;
  39 };
  40
  41 static int ti_musb_get_usb_index(int node)
  42 {
  43         const void *fdt = gd->fdt_blob;
  44         int i = 0;
  45         char path[64];
  46         const char *alias_path;
  47         char alias[16];
  48
  49         fdt_get_path(fdt, node, path, sizeof(path));
  50
  51         do {
  52                 snprintf(alias, sizeof(alias), "usb%d", i);
  53                 alias_path = fdt_get_alias(fdt, alias);
  54                 if (alias_path == NULL) {
  55                         debug("USB index not found\n");
  56                         return -ENOENT;
  57                 }
  58
  59                 if (!strcmp(path, alias_path))
  60                         return i;
  61
  62                 i++;
  63         } while (alias_path);
  64
  65         return -ENOENT;
  66 }
  67
  68 static void ti_musb_set_phy_power(struct udevice *dev, u8 on)
  69 {
  70         struct ti_musb_platdata *platdata = dev_get_platdata(dev);
  71
  72         if (on) {
  73                 clrsetbits_le32(platdata->ctrl_mod_base,
  74                                 CM_PHY_PWRDN | CM_PHY_OTG_PWRDN,
  75                                 OTGVDET_EN | OTGSESSENDEN);
  76         } else {
  77                 clrsetbits_le32(platdata->ctrl_mod_base, 0,
  78                                 CM_PHY_PWRDN | CM_PHY_OTG_PWRDN);
  79         }
  80 }
  81
  82 static int ti_musb_ofdata_to_platdata(struct udevice *dev)
  83 {
  84         struct ti_musb_platdata *platdata = dev_get_platdata(dev);
  85         const void *fdt = gd->fdt_blob;
  86         int node = dev_of_offset(dev);
  87         int phys;
  88         int ctrl_mod;
  89         int usb_index;
  90
  91         platdata->base = (void *)devfdt_get_addr_index(dev, 1);
  92
  93         phys = fdtdec_lookup_phandle(fdt, node, "phys");
  94         ctrl_mod = fdtdec_lookup_phandle(fdt, phys, "ti,ctrl_mod");
  95         platdata->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                 platdata->ctrl_mod_base += AM335X_USB1_CTRL;
 100         case 0:
 101         default:
 102                 break;
 103         }
 104
 105         platdata->musb_config.multipoint = fdtdec_get_int(fdt, node,
 106                                                           "mentor,multipoint",
 107                                                           -1);
 108         if (platdata->musb_config.multipoint < 0) {
 109                 error("MUSB multipoint DT entry missing\n");
 110                 return -ENOENT;
 111         }
 112
 113         platdata->musb_config.dyn_fifo = 1;
 114
 115         platdata->musb_config.num_eps = fdtdec_get_int(fdt, node,
 116                                                        "mentor,num-eps", -1);
 117         if (platdata->musb_config.num_eps < 0) {
 118                 error("MUSB num-eps DT entry missing\n");
 119                 return -ENOENT;
 120         }
 121
 122         platdata->musb_config.ram_bits = fdtdec_get_int(fdt, node,
 123                                                         "mentor,ram-bits", -1);
 124         if (platdata->musb_config.ram_bits < 0) {
 125                 error("MUSB ram-bits DT entry missing\n");
 126                 return -ENOENT;
 127         }
 128
 129         platdata->otg_board_data.set_phy_power = ti_musb_set_phy_power;
 130         platdata->otg_board_data.dev = dev;
 131         platdata->plat.config = &platdata->musb_config;
 132
 133         platdata->plat.power = fdtdec_get_int(fdt, node, "mentor,power", -1);
 134         if (platdata->plat.power < 0) {
 135                 error("MUSB mentor,power DT entry missing\n");
 136                 return -ENOENT;
 137         }
 138
 139         platdata->plat.platform_ops = &musb_dsps_ops;
 140         platdata->plat.board_data = &platdata->otg_board_data;
 141
 142         return 0;
 143 }
 144
 145 static int ti_musb_host_probe(struct udevice *dev)
 146 {
 147         struct musb_host_data *host = dev_get_priv(dev);
 148         struct ti_musb_platdata *platdata = dev_get_platdata(dev);
 149         struct usb_bus_priv *priv = dev_get_uclass_priv(dev);
 150         struct omap_musb_board_data *otg_board_data;
 151         int ret;
 152
 153         priv->desc_before_addr = true;
 154
 155         otg_board_data = &platdata->otg_board_data;
 156
 157         host->host = musb_init_controller(&platdata->plat,
 158                                           (struct device *)otg_board_data,
 159                                           platdata->base);
 160         if (!host->host)
 161                 return -EIO;
 162
 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
 174         return 0;
 175 }
 176
 177 static int ti_musb_host_ofdata_to_platdata(struct udevice *dev)
 178 {
 179         struct ti_musb_platdata *platdata = dev_get_platdata(dev);
 180         const void *fdt = gd->fdt_blob;
 181         int node = dev_of_offset(dev);
 182         int ret;
 183
 184         ret = ti_musb_ofdata_to_platdata(dev);
 185         if (ret) {
 186                 error("platdata dt parse error\n");
 187                 return ret;
 188         }
 189
 190         platdata->plat.mode = MUSB_HOST;
 191
 192         return 0;
 193 }
 194
 195 U_BOOT_DRIVER(ti_musb_host) = {
 196         .name   = "ti-musb-host",
 197         .id     = UCLASS_USB,
 198         .ofdata_to_platdata = ti_musb_host_ofdata_to_platdata,
 199         .probe = ti_musb_host_probe,
 200         .remove = ti_musb_host_remove,
 201         .ops    = &musb_usb_ops,
 202         .platdata_auto_alloc_size = sizeof(struct ti_musb_platdata),
 203         .priv_auto_alloc_size = sizeof(struct musb_host_data),
 204 };
 205
 206 static int ti_musb_wrapper_bind(struct udevice *parent)
 207 {
 208         const void *fdt = gd->fdt_blob;
 209         int node;
 210         int ret;
 211
 212         for (node = fdt_first_subnode(fdt, dev_of_offset(parent)); node > 0;
 213              node = fdt_next_subnode(fdt, node)) {
 214                 struct udevice *dev;
 215                 const char *name = fdt_get_name(fdt, node, NULL);
 216                 enum usb_dr_mode dr_mode;
 217                 struct driver *drv;
 218
 219                 if (strncmp(name, "usb@", 4))
 220                         continue;
 221
 222                 dr_mode = usb_get_dr_mode(node);
 223                 switch (dr_mode) {
 224                 case USB_DR_MODE_PERIPHERAL:
 225                         /* Bind MUSB device */
 226                         break;
 227                 case USB_DR_MODE_HOST:
 228                         /* Bind MUSB host */
 229                         ret = device_bind_driver_to_node(parent, "ti-musb-host",
 230                                                          name, node, &dev);
 231                         if (ret) {
 232                                 error("musb - not able to bind usb host node\n");
 233                                 return ret;
 234                         }
 235                         break;
 236                 default:
 237                         break;
 238                 };
 239         }
 240         return 0;
 241 }
 242
 243 static const struct udevice_id ti_musb_ids[] = {
 244         { .compatible = "ti,am33xx-usb" },
 245         { }
 246 };
 247
 248 U_BOOT_DRIVER(ti_musb_wrapper) = {
 249         .name   = "ti-musb-wrapper",
 250         .id     = UCLASS_MISC,
 251         .of_match = ti_musb_ids,
 252         .bind = ti_musb_wrapper_bind,
 253 };
 254
 255 #endif /* CONFIG_DM_USB */