1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (C) 2015 Jakub Kicinski <kubakici@wp.pl> 4 */ 5 6 #include <linux/kernel.h> 7 #include <linux/module.h> 8 #include <linux/usb.h> 9 10 #include "mt7601u.h" 11 #include "usb.h" 12 #include "trace.h" 13 14 static const struct usb_device_id mt7601u_device_table[] = { 15 { USB_DEVICE(0x0b05, 0x17d3) }, 16 { USB_DEVICE(0x0e8d, 0x760a) }, 17 { USB_DEVICE(0x0e8d, 0x760b) }, 18 { USB_DEVICE(0x13d3, 0x3431) }, 19 { USB_DEVICE(0x13d3, 0x3434) }, 20 { USB_DEVICE(0x148f, 0x7601) }, 21 { USB_DEVICE(0x148f, 0x760a) }, 22 { USB_DEVICE(0x148f, 0x760b) }, 23 { USB_DEVICE(0x148f, 0x760c) }, 24 { USB_DEVICE(0x148f, 0x760d) }, 25 { USB_DEVICE(0x2001, 0x3d04) }, 26 { USB_DEVICE(0x2717, 0x4106) }, 27 { USB_DEVICE(0x2955, 0x0001) }, 28 { USB_DEVICE(0x2955, 0x1001) }, 29 { USB_DEVICE(0x2955, 0x1003) }, 30 { USB_DEVICE(0x2a5f, 0x1000) }, 31 { USB_DEVICE(0x7392, 0x7710) }, 32 { 0, } 33 }; 34 35 bool mt7601u_usb_alloc_buf(struct mt7601u_dev *dev, size_t len, 36 struct mt7601u_dma_buf *buf) 37 { 38 struct usb_device *usb_dev = mt7601u_to_usb_dev(dev); 39 40 buf->len = len; 41 buf->urb = usb_alloc_urb(0, GFP_KERNEL); 42 buf->buf = usb_alloc_coherent(usb_dev, buf->len, GFP_KERNEL, &buf->dma); 43 44 return !buf->urb || !buf->buf; 45 } 46 47 void mt7601u_usb_free_buf(struct mt7601u_dev *dev, struct mt7601u_dma_buf *buf) 48 { 49 struct usb_device *usb_dev = mt7601u_to_usb_dev(dev); 50 51 usb_free_coherent(usb_dev, buf->len, buf->buf, buf->dma); 52 usb_free_urb(buf->urb); 53 } 54 55 int mt7601u_usb_submit_buf(struct mt7601u_dev *dev, int dir, int ep_idx, 56 struct mt7601u_dma_buf *buf, gfp_t gfp, 57 usb_complete_t complete_fn, void *context) 58 { 59 struct usb_device *usb_dev = mt7601u_to_usb_dev(dev); 60 unsigned pipe; 61 int ret; 62 63 if (dir == USB_DIR_IN) 64 pipe = usb_rcvbulkpipe(usb_dev, dev->in_eps[ep_idx]); 65 else 66 pipe = usb_sndbulkpipe(usb_dev, dev->out_eps[ep_idx]); 67 68 usb_fill_bulk_urb(buf->urb, usb_dev, pipe, buf->buf, buf->len, 69 complete_fn, context); 70 buf->urb->transfer_dma = buf->dma; 71 buf->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 72 73 trace_mt_submit_urb(dev, buf->urb); 74 ret = usb_submit_urb(buf->urb, gfp); 75 if (ret) 76 dev_err(dev->dev, "Error: submit URB dir:%d ep:%d failed:%d\n", 77 dir, ep_idx, ret); 78 return ret; 79 } 80 81 void mt7601u_complete_urb(struct urb *urb) 82 { 83 struct completion *cmpl = urb->context; 84 85 complete(cmpl); 86 } 87 88 int mt7601u_vendor_request(struct mt7601u_dev *dev, const u8 req, 89 const u8 direction, const u16 val, const u16 offset, 90 void *buf, const size_t buflen) 91 { 92 int i, ret; 93 struct usb_device *usb_dev = mt7601u_to_usb_dev(dev); 94 const u8 req_type = direction | USB_TYPE_VENDOR | USB_RECIP_DEVICE; 95 const unsigned int pipe = (direction == USB_DIR_IN) ? 96 usb_rcvctrlpipe(usb_dev, 0) : usb_sndctrlpipe(usb_dev, 0); 97 98 for (i = 0; i < MT_VEND_REQ_MAX_RETRY; i++) { 99 ret = usb_control_msg(usb_dev, pipe, req, req_type, 100 val, offset, buf, buflen, 101 MT_VEND_REQ_TOUT_MS); 102 trace_mt_vend_req(dev, pipe, req, req_type, val, offset, 103 buf, buflen, ret); 104 105 if (ret == -ENODEV) 106 set_bit(MT7601U_STATE_REMOVED, &dev->state); 107 if (ret >= 0 || ret == -ENODEV) 108 return ret; 109 110 msleep(5); 111 } 112 113 dev_err(dev->dev, "Vendor request req:%02x off:%04x failed:%d\n", 114 req, offset, ret); 115 116 return ret; 117 } 118 119 void mt7601u_vendor_reset(struct mt7601u_dev *dev) 120 { 121 mt7601u_vendor_request(dev, MT_VEND_DEV_MODE, USB_DIR_OUT, 122 MT_VEND_DEV_MODE_RESET, 0, NULL, 0); 123 } 124 125 /* should be called with vendor_req_mutex held */ 126 static u32 __mt7601u_rr(struct mt7601u_dev *dev, u32 offset) 127 { 128 int ret; 129 u32 val = ~0; 130 131 WARN_ONCE(offset > USHRT_MAX, "read high off:%08x", offset); 132 133 ret = mt7601u_vendor_request(dev, MT_VEND_MULTI_READ, USB_DIR_IN, 134 0, offset, dev->vend_buf, MT_VEND_BUF); 135 if (ret == MT_VEND_BUF) 136 val = get_unaligned_le32(dev->vend_buf); 137 else if (ret > 0) 138 dev_err(dev->dev, "Error: wrong size read:%d off:%08x\n", 139 ret, offset); 140 141 trace_reg_read(dev, offset, val); 142 return val; 143 } 144 145 u32 mt7601u_rr(struct mt7601u_dev *dev, u32 offset) 146 { 147 u32 ret; 148 149 mutex_lock(&dev->vendor_req_mutex); 150 ret = __mt7601u_rr(dev, offset); 151 mutex_unlock(&dev->vendor_req_mutex); 152 153 return ret; 154 } 155 156 /* should be called with vendor_req_mutex held */ 157 static int __mt7601u_vendor_single_wr(struct mt7601u_dev *dev, const u8 req, 158 const u16 offset, const u32 val) 159 { 160 int ret = mt7601u_vendor_request(dev, req, USB_DIR_OUT, 161 val & 0xffff, offset, NULL, 0); 162 if (!ret) 163 ret = mt7601u_vendor_request(dev, req, USB_DIR_OUT, 164 val >> 16, offset + 2, NULL, 0); 165 trace_reg_write(dev, offset, val); 166 return ret; 167 } 168 169 int mt7601u_vendor_single_wr(struct mt7601u_dev *dev, const u8 req, 170 const u16 offset, const u32 val) 171 { 172 int ret; 173 174 mutex_lock(&dev->vendor_req_mutex); 175 ret = __mt7601u_vendor_single_wr(dev, req, offset, val); 176 mutex_unlock(&dev->vendor_req_mutex); 177 178 return ret; 179 } 180 181 void mt7601u_wr(struct mt7601u_dev *dev, u32 offset, u32 val) 182 { 183 WARN_ONCE(offset > USHRT_MAX, "write high off:%08x", offset); 184 185 mt7601u_vendor_single_wr(dev, MT_VEND_WRITE, offset, val); 186 } 187 188 u32 mt7601u_rmw(struct mt7601u_dev *dev, u32 offset, u32 mask, u32 val) 189 { 190 mutex_lock(&dev->vendor_req_mutex); 191 val |= __mt7601u_rr(dev, offset) & ~mask; 192 __mt7601u_vendor_single_wr(dev, MT_VEND_WRITE, offset, val); 193 mutex_unlock(&dev->vendor_req_mutex); 194 195 return val; 196 } 197 198 u32 mt7601u_rmc(struct mt7601u_dev *dev, u32 offset, u32 mask, u32 val) 199 { 200 u32 reg; 201 202 mutex_lock(&dev->vendor_req_mutex); 203 reg = __mt7601u_rr(dev, offset); 204 val |= reg & ~mask; 205 if (reg != val) 206 __mt7601u_vendor_single_wr(dev, MT_VEND_WRITE, 207 offset, val); 208 mutex_unlock(&dev->vendor_req_mutex); 209 210 return val; 211 } 212 213 void mt7601u_wr_copy(struct mt7601u_dev *dev, u32 offset, 214 const void *data, int len) 215 { 216 WARN_ONCE(offset & 3, "unaligned write copy off:%08x", offset); 217 WARN_ONCE(len & 3, "short write copy off:%08x", offset); 218 219 mt7601u_burst_write_regs(dev, offset, data, len / 4); 220 } 221 222 void mt7601u_addr_wr(struct mt7601u_dev *dev, const u32 offset, const u8 *addr) 223 { 224 mt7601u_wr(dev, offset, get_unaligned_le32(addr)); 225 mt7601u_wr(dev, offset + 4, addr[4] | addr[5] << 8); 226 } 227 228 static int mt7601u_assign_pipes(struct usb_interface *usb_intf, 229 struct mt7601u_dev *dev) 230 { 231 struct usb_endpoint_descriptor *ep_desc; 232 struct usb_host_interface *intf_desc = usb_intf->cur_altsetting; 233 unsigned i, ep_i = 0, ep_o = 0; 234 235 BUILD_BUG_ON(sizeof(dev->in_eps) < __MT_EP_IN_MAX); 236 BUILD_BUG_ON(sizeof(dev->out_eps) < __MT_EP_OUT_MAX); 237 238 for (i = 0; i < intf_desc->desc.bNumEndpoints; i++) { 239 ep_desc = &intf_desc->endpoint[i].desc; 240 241 if (usb_endpoint_is_bulk_in(ep_desc) && 242 ep_i++ < __MT_EP_IN_MAX) { 243 dev->in_eps[ep_i - 1] = usb_endpoint_num(ep_desc); 244 dev->in_max_packet = usb_endpoint_maxp(ep_desc); 245 /* Note: this is ignored by usb sub-system but vendor 246 * code does it. We can drop this at some point. 247 */ 248 dev->in_eps[ep_i - 1] |= USB_DIR_IN; 249 } else if (usb_endpoint_is_bulk_out(ep_desc) && 250 ep_o++ < __MT_EP_OUT_MAX) { 251 dev->out_eps[ep_o - 1] = usb_endpoint_num(ep_desc); 252 dev->out_max_packet = usb_endpoint_maxp(ep_desc); 253 } 254 } 255 256 if (ep_i != __MT_EP_IN_MAX || ep_o != __MT_EP_OUT_MAX) { 257 dev_err(dev->dev, "Error: wrong pipe number in:%d out:%d\n", 258 ep_i, ep_o); 259 return -EINVAL; 260 } 261 262 return 0; 263 } 264 265 static int mt7601u_probe(struct usb_interface *usb_intf, 266 const struct usb_device_id *id) 267 { 268 struct usb_device *usb_dev = interface_to_usbdev(usb_intf); 269 struct mt7601u_dev *dev; 270 u32 asic_rev, mac_rev; 271 int ret; 272 273 dev = mt7601u_alloc_device(&usb_intf->dev); 274 if (!dev) 275 return -ENOMEM; 276 277 usb_dev = usb_get_dev(usb_dev); 278 usb_reset_device(usb_dev); 279 280 usb_set_intfdata(usb_intf, dev); 281 282 dev->vend_buf = devm_kmalloc(dev->dev, MT_VEND_BUF, GFP_KERNEL); 283 if (!dev->vend_buf) { 284 ret = -ENOMEM; 285 goto err; 286 } 287 288 ret = mt7601u_assign_pipes(usb_intf, dev); 289 if (ret) 290 goto err; 291 ret = mt7601u_wait_asic_ready(dev); 292 if (ret) 293 goto err; 294 295 asic_rev = mt7601u_rr(dev, MT_ASIC_VERSION); 296 mac_rev = mt7601u_rr(dev, MT_MAC_CSR0); 297 dev_info(dev->dev, "ASIC revision: %08x MAC revision: %08x\n", 298 asic_rev, mac_rev); 299 if ((asic_rev >> 16) != 0x7601) { 300 ret = -ENODEV; 301 goto err; 302 } 303 304 /* Note: vendor driver skips this check for MT7601U */ 305 if (!(mt7601u_rr(dev, MT_EFUSE_CTRL) & MT_EFUSE_CTRL_SEL)) 306 dev_warn(dev->dev, "Warning: eFUSE not present\n"); 307 308 ret = mt7601u_init_hardware(dev); 309 if (ret) 310 goto err; 311 ret = mt7601u_register_device(dev); 312 if (ret) 313 goto err_hw; 314 315 set_bit(MT7601U_STATE_INITIALIZED, &dev->state); 316 317 return 0; 318 err_hw: 319 mt7601u_cleanup(dev); 320 err: 321 usb_set_intfdata(usb_intf, NULL); 322 usb_put_dev(interface_to_usbdev(usb_intf)); 323 324 destroy_workqueue(dev->stat_wq); 325 ieee80211_free_hw(dev->hw); 326 return ret; 327 } 328 329 static void mt7601u_disconnect(struct usb_interface *usb_intf) 330 { 331 struct mt7601u_dev *dev = usb_get_intfdata(usb_intf); 332 333 ieee80211_unregister_hw(dev->hw); 334 mt7601u_cleanup(dev); 335 336 usb_set_intfdata(usb_intf, NULL); 337 usb_put_dev(interface_to_usbdev(usb_intf)); 338 339 destroy_workqueue(dev->stat_wq); 340 ieee80211_free_hw(dev->hw); 341 } 342 343 static int mt7601u_suspend(struct usb_interface *usb_intf, pm_message_t state) 344 { 345 struct mt7601u_dev *dev = usb_get_intfdata(usb_intf); 346 347 mt7601u_cleanup(dev); 348 349 return 0; 350 } 351 352 static int mt7601u_resume(struct usb_interface *usb_intf) 353 { 354 struct mt7601u_dev *dev = usb_get_intfdata(usb_intf); 355 int ret; 356 357 ret = mt7601u_init_hardware(dev); 358 if (ret) 359 return ret; 360 361 set_bit(MT7601U_STATE_INITIALIZED, &dev->state); 362 363 return 0; 364 } 365 366 MODULE_DEVICE_TABLE(usb, mt7601u_device_table); 367 MODULE_FIRMWARE(MT7601U_FIRMWARE); 368 MODULE_DESCRIPTION("MediaTek MT7601U USB Wireless LAN driver"); 369 MODULE_LICENSE("GPL"); 370 371 static struct usb_driver mt7601u_driver = { 372 .name = KBUILD_MODNAME, 373 .id_table = mt7601u_device_table, 374 .probe = mt7601u_probe, 375 .disconnect = mt7601u_disconnect, 376 .suspend = mt7601u_suspend, 377 .resume = mt7601u_resume, 378 .reset_resume = mt7601u_resume, 379 .soft_unbind = 1, 380 .disable_hub_initiated_lpm = 1, 381 }; 382 module_usb_driver(mt7601u_driver); 383