drivers/net/wireless/mediatek/mt7601u/usb.c

   1 /*
   2  * Copyright (C) 2015 Jakub Kicinski <kubakici@wp.pl>
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 2
   6  * as published by the Free Software Foundation
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  11  * GNU General Public License for more details.
  12  */
  13
  14 #include <linux/kernel.h>
  15 #include <linux/module.h>
  16 #include <linux/usb.h>
  17
  18 #include "mt7601u.h"
  19 #include "usb.h"
  20 #include "trace.h"
  21
  22 static struct usb_device_id mt7601u_device_table[] = {
  23         { USB_DEVICE(0x0b05, 0x17d3) },
  24         { USB_DEVICE(0x0e8d, 0x760a) },
  25         { USB_DEVICE(0x0e8d, 0x760b) },
  26         { USB_DEVICE(0x13d3, 0x3431) },
  27         { USB_DEVICE(0x13d3, 0x3434) },
  28         { USB_DEVICE(0x148f, 0x7601) },
  29         { USB_DEVICE(0x148f, 0x760a) },
  30         { USB_DEVICE(0x148f, 0x760b) },
  31         { USB_DEVICE(0x148f, 0x760c) },
  32         { USB_DEVICE(0x148f, 0x760d) },
  33         { USB_DEVICE(0x2001, 0x3d04) },
  34         { USB_DEVICE(0x2717, 0x4106) },
  35         { USB_DEVICE(0x2955, 0x0001) },
  36         { USB_DEVICE(0x2955, 0x1001) },
  37         { USB_DEVICE(0x2a5f, 0x1000) },
  38         { USB_DEVICE(0x7392, 0x7710) },
  39         { 0, }
  40 };
  41
  42 bool mt7601u_usb_alloc_buf(struct mt7601u_dev *dev, size_t len,
  43                            struct mt7601u_dma_buf *buf)
  44 {
  45         struct usb_device *usb_dev = mt7601u_to_usb_dev(dev);
  46
  47         buf->len = len;
  48         buf->urb = usb_alloc_urb(0, GFP_KERNEL);
  49         buf->buf = usb_alloc_coherent(usb_dev, buf->len, GFP_KERNEL, &buf->dma);
  50
  51         return !buf->urb || !buf->buf;
  52 }
  53
  54 void mt7601u_usb_free_buf(struct mt7601u_dev *dev, struct mt7601u_dma_buf *buf)
  55 {
  56         struct usb_device *usb_dev = mt7601u_to_usb_dev(dev);
  57
  58         usb_free_coherent(usb_dev, buf->len, buf->buf, buf->dma);
  59         usb_free_urb(buf->urb);
  60 }
  61
  62 int mt7601u_usb_submit_buf(struct mt7601u_dev *dev, int dir, int ep_idx,
  63                            struct mt7601u_dma_buf *buf, gfp_t gfp,
  64                            usb_complete_t complete_fn, void *context)
  65 {
  66         struct usb_device *usb_dev = mt7601u_to_usb_dev(dev);
  67         unsigned pipe;
  68         int ret;
  69
  70         if (dir == USB_DIR_IN)
  71                 pipe = usb_rcvbulkpipe(usb_dev, dev->in_eps[ep_idx]);
  72         else
  73                 pipe = usb_sndbulkpipe(usb_dev, dev->out_eps[ep_idx]);
  74
  75         usb_fill_bulk_urb(buf->urb, usb_dev, pipe, buf->buf, buf->len,
  76                           complete_fn, context);
  77         buf->urb->transfer_dma = buf->dma;
  78         buf->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
  79
  80         trace_mt_submit_urb(dev, buf->urb);
  81         ret = usb_submit_urb(buf->urb, gfp);
  82         if (ret)
  83                 dev_err(dev->dev, "Error: submit URB dir:%d ep:%d failed:%d\n",
  84                         dir, ep_idx, ret);
  85         return ret;
  86 }
  87
  88 void mt7601u_complete_urb(struct urb *urb)
  89 {
  90         struct completion *cmpl = urb->context;
  91
  92         complete(cmpl);
  93 }
  94
  95 static int
  96 __mt7601u_vendor_request(struct mt7601u_dev *dev, const u8 req,
  97                          const u8 direction, const u16 val, const u16 offset,
  98                          void *buf, const size_t buflen)
  99 {
 100         int i, ret;
 101         struct usb_device *usb_dev = mt7601u_to_usb_dev(dev);
 102         const u8 req_type = direction | USB_TYPE_VENDOR | USB_RECIP_DEVICE;
 103         const unsigned int pipe = (direction == USB_DIR_IN) ?
 104                 usb_rcvctrlpipe(usb_dev, 0) : usb_sndctrlpipe(usb_dev, 0);
 105
 106         for (i = 0; i < MT_VEND_REQ_MAX_RETRY; i++) {
 107                 ret = usb_control_msg(usb_dev, pipe, req, req_type,
 108                                       val, offset, buf, buflen,
 109                                       MT_VEND_REQ_TOUT_MS);
 110                 trace_mt_vend_req(dev, pipe, req, req_type, val, offset,
 111                                   buf, buflen, ret);
 112
 113                 if (ret >= 0 || ret == -ENODEV)
 114                         return ret;
 115
 116                 msleep(5);
 117         }
 118
 119         dev_err(dev->dev, "Vendor request req:%02x off:%04x failed:%d\n",
 120                 req, offset, ret);
 121
 122         return ret;
 123 }
 124
 125 int
 126 mt7601u_vendor_request(struct mt7601u_dev *dev, const u8 req,
 127                        const u8 direction, const u16 val, const u16 offset,
 128                        void *buf, const size_t buflen)
 129 {
 130         int ret;
 131
 132         mutex_lock(&dev->vendor_req_mutex);
 133
 134         ret = __mt7601u_vendor_request(dev, req, direction, val, offset,
 135                                        buf, buflen);
 136         if (ret == -ENODEV)
 137                 set_bit(MT7601U_STATE_REMOVED, &dev->state);
 138
 139         mutex_unlock(&dev->vendor_req_mutex);
 140
 141         return ret;
 142 }
 143
 144 void mt7601u_vendor_reset(struct mt7601u_dev *dev)
 145 {
 146         mt7601u_vendor_request(dev, MT_VEND_DEV_MODE, USB_DIR_OUT,
 147                                MT_VEND_DEV_MODE_RESET, 0, NULL, 0);
 148 }
 149
 150 u32 mt7601u_rr(struct mt7601u_dev *dev, u32 offset)
 151 {
 152         int ret;
 153         __le32 reg;
 154         u32 val;
 155
 156         WARN_ONCE(offset > USHRT_MAX, "read high off:%08x", offset);
 157
 158         ret = mt7601u_vendor_request(dev, MT_VEND_MULTI_READ, USB_DIR_IN,
 159                                      0, offset, &reg, sizeof(reg));
 160         val = le32_to_cpu(reg);
 161         if (ret > 0 && ret != sizeof(reg)) {
 162                 dev_err(dev->dev, "Error: wrong size read:%d off:%08x\n",
 163                         ret, offset);
 164                 val = ~0;
 165         }
 166
 167         trace_reg_read(dev, offset, val);
 168         return val;
 169 }
 170
 171 int mt7601u_vendor_single_wr(struct mt7601u_dev *dev, const u8 req,
 172                              const u16 offset, const u32 val)
 173 {
 174         int ret;
 175
 176         ret = mt7601u_vendor_request(dev, req, USB_DIR_OUT,
 177                                      val & 0xffff, offset, NULL, 0);
 178         if (ret)
 179                 return ret;
 180         return mt7601u_vendor_request(dev, req, USB_DIR_OUT,
 181                                       val >> 16, offset + 2, NULL, 0);
 182 }
 183
 184 void mt7601u_wr(struct mt7601u_dev *dev, u32 offset, u32 val)
 185 {
 186         WARN_ONCE(offset > USHRT_MAX, "write high off:%08x", offset);
 187
 188         mt7601u_vendor_single_wr(dev, MT_VEND_WRITE, offset, val);
 189         trace_reg_write(dev, offset, val);
 190 }
 191
 192 u32 mt7601u_rmw(struct mt7601u_dev *dev, u32 offset, u32 mask, u32 val)
 193 {
 194         val |= mt7601u_rr(dev, offset) & ~mask;
 195         mt7601u_wr(dev, offset, val);
 196         return val;
 197 }
 198
 199 u32 mt7601u_rmc(struct mt7601u_dev *dev, u32 offset, u32 mask, u32 val)
 200 {
 201         u32 reg = mt7601u_rr(dev, offset);
 202
 203         val |= reg & ~mask;
 204         if (reg != val)
 205                 mt7601u_wr(dev, offset, val);
 206         return val;
 207 }
 208
 209 void mt7601u_wr_copy(struct mt7601u_dev *dev, u32 offset,
 210                      const void *data, int len)
 211 {
 212         WARN_ONCE(offset & 3, "unaligned write copy off:%08x", offset);
 213         WARN_ONCE(len & 3, "short write copy off:%08x", offset);
 214
 215         mt7601u_burst_write_regs(dev, offset, data, len / 4);
 216 }
 217
 218 void mt7601u_addr_wr(struct mt7601u_dev *dev, const u32 offset, const u8 *addr)
 219 {
 220         mt7601u_wr(dev, offset, get_unaligned_le32(addr));
 221         mt7601u_wr(dev, offset + 4, addr[4] | addr[5] << 8);
 222 }
 223
 224 static int mt7601u_assign_pipes(struct usb_interface *usb_intf,
 225                                 struct mt7601u_dev *dev)
 226 {
 227         struct usb_endpoint_descriptor *ep_desc;
 228         struct usb_host_interface *intf_desc = usb_intf->cur_altsetting;
 229         unsigned i, ep_i = 0, ep_o = 0;
 230
 231         BUILD_BUG_ON(sizeof(dev->in_eps) < __MT_EP_IN_MAX);
 232         BUILD_BUG_ON(sizeof(dev->out_eps) < __MT_EP_OUT_MAX);
 233
 234         for (i = 0; i < intf_desc->desc.bNumEndpoints; i++) {
 235                 ep_desc = &intf_desc->endpoint[i].desc;
 236
 237                 if (usb_endpoint_is_bulk_in(ep_desc) &&
 238                     ep_i++ < __MT_EP_IN_MAX) {
 239                         dev->in_eps[ep_i - 1] = usb_endpoint_num(ep_desc);
 240                         dev->in_max_packet = usb_endpoint_maxp(ep_desc);
 241                         /* Note: this is ignored by usb sub-system but vendor
 242                          *       code does it. We can drop this at some point.
 243                          */
 244                         dev->in_eps[ep_i - 1] |= USB_DIR_IN;
 245                 } else if (usb_endpoint_is_bulk_out(ep_desc) &&
 246                            ep_o++ < __MT_EP_OUT_MAX) {
 247                         dev->out_eps[ep_o - 1] = usb_endpoint_num(ep_desc);
 248                         dev->out_max_packet = usb_endpoint_maxp(ep_desc);
 249                 }
 250         }
 251
 252         if (ep_i != __MT_EP_IN_MAX || ep_o != __MT_EP_OUT_MAX) {
 253                 dev_err(dev->dev, "Error: wrong pipe number in:%d out:%d\n",
 254                         ep_i, ep_o);
 255                 return -EINVAL;
 256         }
 257
 258         return 0;
 259 }
 260
 261 static int mt7601u_probe(struct usb_interface *usb_intf,
 262                          const struct usb_device_id *id)
 263 {
 264         struct usb_device *usb_dev = interface_to_usbdev(usb_intf);
 265         struct mt7601u_dev *dev;
 266         u32 asic_rev, mac_rev;
 267         int ret;
 268
 269         dev = mt7601u_alloc_device(&usb_intf->dev);
 270         if (!dev)
 271                 return -ENOMEM;
 272
 273         usb_dev = usb_get_dev(usb_dev);
 274         usb_reset_device(usb_dev);
 275
 276         usb_set_intfdata(usb_intf, dev);
 277
 278         ret = mt7601u_assign_pipes(usb_intf, dev);
 279         if (ret)
 280                 goto err;
 281         ret = mt7601u_wait_asic_ready(dev);
 282         if (ret)
 283                 goto err;
 284
 285         asic_rev = mt7601u_rr(dev, MT_ASIC_VERSION);
 286         mac_rev = mt7601u_rr(dev, MT_MAC_CSR0);
 287         dev_info(dev->dev, "ASIC revision: %08x MAC revision: %08x\n",
 288                  asic_rev, mac_rev);
 289
 290         /* Note: vendor driver skips this check for MT7601U */
 291         if (!(mt7601u_rr(dev, MT_EFUSE_CTRL) & MT_EFUSE_CTRL_SEL))
 292                 dev_warn(dev->dev, "Warning: eFUSE not present\n");
 293
 294         ret = mt7601u_init_hardware(dev);
 295         if (ret)
 296                 goto err;
 297         ret = mt7601u_register_device(dev);
 298         if (ret)
 299                 goto err_hw;
 300
 301         set_bit(MT7601U_STATE_INITIALIZED, &dev->state);
 302
 303         return 0;
 304 err_hw:
 305         mt7601u_cleanup(dev);
 306 err:
 307         usb_set_intfdata(usb_intf, NULL);
 308         usb_put_dev(interface_to_usbdev(usb_intf));
 309
 310         destroy_workqueue(dev->stat_wq);
 311         ieee80211_free_hw(dev->hw);
 312         return ret;
 313 }
 314
 315 static void mt7601u_disconnect(struct usb_interface *usb_intf)
 316 {
 317         struct mt7601u_dev *dev = usb_get_intfdata(usb_intf);
 318
 319         ieee80211_unregister_hw(dev->hw);
 320         mt7601u_cleanup(dev);
 321
 322         usb_set_intfdata(usb_intf, NULL);
 323         usb_put_dev(interface_to_usbdev(usb_intf));
 324
 325         destroy_workqueue(dev->stat_wq);
 326         ieee80211_free_hw(dev->hw);
 327 }
 328
 329 static int mt7601u_suspend(struct usb_interface *usb_intf, pm_message_t state)
 330 {
 331         struct mt7601u_dev *dev = usb_get_intfdata(usb_intf);
 332
 333         mt7601u_cleanup(dev);
 334
 335         return 0;
 336 }
 337
 338 static int mt7601u_resume(struct usb_interface *usb_intf)
 339 {
 340         struct mt7601u_dev *dev = usb_get_intfdata(usb_intf);
 341
 342         return mt7601u_init_hardware(dev);
 343 }
 344
 345 MODULE_DEVICE_TABLE(usb, mt7601u_device_table);
 346 MODULE_FIRMWARE(MT7601U_FIRMWARE);
 347 MODULE_LICENSE("GPL");
 348
 349 static struct usb_driver mt7601u_driver = {
 350         .name           = KBUILD_MODNAME,
 351         .id_table       = mt7601u_device_table,
 352         .probe          = mt7601u_probe,
 353         .disconnect     = mt7601u_disconnect,
 354         .suspend        = mt7601u_suspend,
 355         .resume         = mt7601u_resume,
 356         .reset_resume   = mt7601u_resume,
 357         .soft_unbind    = 1,
 358         .disable_hub_initiated_lpm = 1,
 359 };
 360 module_usb_driver(mt7601u_driver);