1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * (c) Copyright 2002-2010, Ralink Technology, Inc. 4 * Copyright (C) 2014 Felix Fietkau <nbd@openwrt.org> 5 * Copyright (C) 2015 Jakub Kicinski <kubakici@wp.pl> 6 */ 7 8 #include <linux/kernel.h> 9 #include <linux/firmware.h> 10 #include <linux/delay.h> 11 #include <linux/usb.h> 12 #include <linux/skbuff.h> 13 14 #include "mt7601u.h" 15 #include "dma.h" 16 #include "mcu.h" 17 #include "usb.h" 18 #include "trace.h" 19 20 #define MCU_FW_URB_MAX_PAYLOAD 0x3800 21 #define MCU_FW_URB_SIZE (MCU_FW_URB_MAX_PAYLOAD + 12) 22 #define MCU_RESP_URB_SIZE 1024 23 24 static inline int firmware_running(struct mt7601u_dev *dev) 25 { 26 return mt7601u_rr(dev, MT_MCU_COM_REG0) == 1; 27 } 28 29 static inline void skb_put_le32(struct sk_buff *skb, u32 val) 30 { 31 put_unaligned_le32(val, skb_put(skb, 4)); 32 } 33 34 static inline void mt7601u_dma_skb_wrap_cmd(struct sk_buff *skb, 35 u8 seq, enum mcu_cmd cmd) 36 { 37 WARN_ON(mt7601u_dma_skb_wrap(skb, CPU_TX_PORT, DMA_COMMAND, 38 FIELD_PREP(MT_TXD_CMD_INFO_SEQ, seq) | 39 FIELD_PREP(MT_TXD_CMD_INFO_TYPE, cmd))); 40 } 41 42 static inline void trace_mt_mcu_msg_send_cs(struct mt7601u_dev *dev, 43 struct sk_buff *skb, bool need_resp) 44 { 45 u32 i, csum = 0; 46 47 for (i = 0; i < skb->len / 4; i++) 48 csum ^= get_unaligned_le32(skb->data + i * 4); 49 50 trace_mt_mcu_msg_send(dev, skb, csum, need_resp); 51 } 52 53 static struct sk_buff *mt7601u_mcu_msg_alloc(const void *data, int len) 54 { 55 struct sk_buff *skb; 56 57 WARN_ON(len % 4); /* if length is not divisible by 4 we need to pad */ 58 59 skb = alloc_skb(len + MT_DMA_HDR_LEN + 4, GFP_KERNEL); 60 if (skb) { 61 skb_reserve(skb, MT_DMA_HDR_LEN); 62 skb_put_data(skb, data, len); 63 } 64 65 return skb; 66 } 67 68 static int mt7601u_mcu_wait_resp(struct mt7601u_dev *dev, u8 seq) 69 { 70 struct urb *urb = dev->mcu.resp.urb; 71 u32 rxfce; 72 int urb_status, ret, i = 5; 73 74 while (i--) { 75 if (!wait_for_completion_timeout(&dev->mcu.resp_cmpl, 76 msecs_to_jiffies(300))) { 77 dev_warn(dev->dev, "Warning: %s retrying\n", __func__); 78 continue; 79 } 80 81 /* Make copies of important data before reusing the urb */ 82 rxfce = get_unaligned_le32(dev->mcu.resp.buf); 83 urb_status = urb->status * mt7601u_urb_has_error(urb); 84 85 ret = mt7601u_usb_submit_buf(dev, USB_DIR_IN, MT_EP_IN_CMD_RESP, 86 &dev->mcu.resp, GFP_KERNEL, 87 mt7601u_complete_urb, 88 &dev->mcu.resp_cmpl); 89 if (ret) 90 return ret; 91 92 if (urb_status) 93 dev_err(dev->dev, "Error: MCU resp urb failed:%d\n", 94 urb_status); 95 96 if (FIELD_GET(MT_RXD_CMD_INFO_CMD_SEQ, rxfce) == seq && 97 FIELD_GET(MT_RXD_CMD_INFO_EVT_TYPE, rxfce) == CMD_DONE) 98 return 0; 99 100 dev_err(dev->dev, "Error: MCU resp evt:%lx seq:%hhx-%lx!\n", 101 FIELD_GET(MT_RXD_CMD_INFO_EVT_TYPE, rxfce), 102 seq, FIELD_GET(MT_RXD_CMD_INFO_CMD_SEQ, rxfce)); 103 } 104 105 dev_err(dev->dev, "Error: %s timed out\n", __func__); 106 return -ETIMEDOUT; 107 } 108 109 static int 110 mt7601u_mcu_msg_send(struct mt7601u_dev *dev, struct sk_buff *skb, 111 enum mcu_cmd cmd, bool wait_resp) 112 { 113 struct usb_device *usb_dev = mt7601u_to_usb_dev(dev); 114 unsigned cmd_pipe = usb_sndbulkpipe(usb_dev, 115 dev->out_eps[MT_EP_OUT_INBAND_CMD]); 116 int sent, ret; 117 u8 seq = 0; 118 119 if (test_bit(MT7601U_STATE_REMOVED, &dev->state)) 120 return 0; 121 122 mutex_lock(&dev->mcu.mutex); 123 124 if (wait_resp) 125 while (!seq) 126 seq = ++dev->mcu.msg_seq & 0xf; 127 128 mt7601u_dma_skb_wrap_cmd(skb, seq, cmd); 129 130 if (dev->mcu.resp_cmpl.done) 131 dev_err(dev->dev, "Error: MCU response pre-completed!\n"); 132 133 trace_mt_mcu_msg_send_cs(dev, skb, wait_resp); 134 trace_mt_submit_urb_sync(dev, cmd_pipe, skb->len); 135 ret = usb_bulk_msg(usb_dev, cmd_pipe, skb->data, skb->len, &sent, 500); 136 if (ret) { 137 dev_err(dev->dev, "Error: send MCU cmd failed:%d\n", ret); 138 goto out; 139 } 140 if (sent != skb->len) 141 dev_err(dev->dev, "Error: %s sent != skb->len\n", __func__); 142 143 if (wait_resp) 144 ret = mt7601u_mcu_wait_resp(dev, seq); 145 out: 146 mutex_unlock(&dev->mcu.mutex); 147 148 consume_skb(skb); 149 150 return ret; 151 } 152 153 static int mt7601u_mcu_function_select(struct mt7601u_dev *dev, 154 enum mcu_function func, u32 val) 155 { 156 struct sk_buff *skb; 157 struct { 158 __le32 id; 159 __le32 value; 160 } __packed __aligned(4) msg = { 161 .id = cpu_to_le32(func), 162 .value = cpu_to_le32(val), 163 }; 164 165 skb = mt7601u_mcu_msg_alloc(&msg, sizeof(msg)); 166 if (!skb) 167 return -ENOMEM; 168 return mt7601u_mcu_msg_send(dev, skb, CMD_FUN_SET_OP, func == 5); 169 } 170 171 int mt7601u_mcu_tssi_read_kick(struct mt7601u_dev *dev, int use_hvga) 172 { 173 int ret; 174 175 if (!test_bit(MT7601U_STATE_MCU_RUNNING, &dev->state)) 176 return 0; 177 178 ret = mt7601u_mcu_function_select(dev, ATOMIC_TSSI_SETTING, 179 use_hvga); 180 if (ret) { 181 dev_warn(dev->dev, "Warning: MCU TSSI read kick failed\n"); 182 return ret; 183 } 184 185 dev->tssi_read_trig = true; 186 187 return 0; 188 } 189 190 int 191 mt7601u_mcu_calibrate(struct mt7601u_dev *dev, enum mcu_calibrate cal, u32 val) 192 { 193 struct sk_buff *skb; 194 struct { 195 __le32 id; 196 __le32 value; 197 } __packed __aligned(4) msg = { 198 .id = cpu_to_le32(cal), 199 .value = cpu_to_le32(val), 200 }; 201 202 skb = mt7601u_mcu_msg_alloc(&msg, sizeof(msg)); 203 if (!skb) 204 return -ENOMEM; 205 return mt7601u_mcu_msg_send(dev, skb, CMD_CALIBRATION_OP, true); 206 } 207 208 int mt7601u_write_reg_pairs(struct mt7601u_dev *dev, u32 base, 209 const struct mt76_reg_pair *data, int n) 210 { 211 const int max_vals_per_cmd = INBAND_PACKET_MAX_LEN / 8; 212 struct sk_buff *skb; 213 int cnt, i, ret; 214 215 if (!n) 216 return 0; 217 218 cnt = min(max_vals_per_cmd, n); 219 220 skb = alloc_skb(cnt * 8 + MT_DMA_HDR_LEN + 4, GFP_KERNEL); 221 if (!skb) 222 return -ENOMEM; 223 skb_reserve(skb, MT_DMA_HDR_LEN); 224 225 for (i = 0; i < cnt; i++) { 226 skb_put_le32(skb, base + data[i].reg); 227 skb_put_le32(skb, data[i].value); 228 } 229 230 ret = mt7601u_mcu_msg_send(dev, skb, CMD_RANDOM_WRITE, cnt == n); 231 if (ret) 232 return ret; 233 234 return mt7601u_write_reg_pairs(dev, base, data + cnt, n - cnt); 235 } 236 237 int mt7601u_burst_write_regs(struct mt7601u_dev *dev, u32 offset, 238 const u32 *data, int n) 239 { 240 const int max_regs_per_cmd = INBAND_PACKET_MAX_LEN / 4 - 1; 241 struct sk_buff *skb; 242 int cnt, i, ret; 243 244 if (!n) 245 return 0; 246 247 cnt = min(max_regs_per_cmd, n); 248 249 skb = alloc_skb(cnt * 4 + MT_DMA_HDR_LEN + 4, GFP_KERNEL); 250 if (!skb) 251 return -ENOMEM; 252 skb_reserve(skb, MT_DMA_HDR_LEN); 253 254 skb_put_le32(skb, MT_MCU_MEMMAP_WLAN + offset); 255 for (i = 0; i < cnt; i++) 256 skb_put_le32(skb, data[i]); 257 258 ret = mt7601u_mcu_msg_send(dev, skb, CMD_BURST_WRITE, cnt == n); 259 if (ret) 260 return ret; 261 262 return mt7601u_burst_write_regs(dev, offset + cnt * 4, 263 data + cnt, n - cnt); 264 } 265 266 struct mt76_fw_header { 267 __le32 ilm_len; 268 __le32 dlm_len; 269 __le16 build_ver; 270 __le16 fw_ver; 271 u8 pad[4]; 272 char build_time[16]; 273 }; 274 275 struct mt76_fw { 276 struct mt76_fw_header hdr; 277 u8 ivb[MT_MCU_IVB_SIZE]; 278 u8 ilm[]; 279 }; 280 281 static int __mt7601u_dma_fw(struct mt7601u_dev *dev, 282 const struct mt7601u_dma_buf *dma_buf, 283 const void *data, u32 len, u32 dst_addr) 284 { 285 DECLARE_COMPLETION_ONSTACK(cmpl); 286 struct mt7601u_dma_buf buf = *dma_buf; /* we need to fake length */ 287 __le32 reg; 288 u32 val; 289 int ret; 290 291 reg = cpu_to_le32(FIELD_PREP(MT_TXD_INFO_TYPE, DMA_PACKET) | 292 FIELD_PREP(MT_TXD_INFO_D_PORT, CPU_TX_PORT) | 293 FIELD_PREP(MT_TXD_INFO_LEN, len)); 294 memcpy(buf.buf, ®, sizeof(reg)); 295 memcpy(buf.buf + sizeof(reg), data, len); 296 memset(buf.buf + sizeof(reg) + len, 0, 8); 297 298 ret = mt7601u_vendor_single_wr(dev, MT_VEND_WRITE_FCE, 299 MT_FCE_DMA_ADDR, dst_addr); 300 if (ret) 301 return ret; 302 len = roundup(len, 4); 303 ret = mt7601u_vendor_single_wr(dev, MT_VEND_WRITE_FCE, 304 MT_FCE_DMA_LEN, len << 16); 305 if (ret) 306 return ret; 307 308 buf.len = MT_DMA_HDR_LEN + len + 4; 309 ret = mt7601u_usb_submit_buf(dev, USB_DIR_OUT, MT_EP_OUT_INBAND_CMD, 310 &buf, GFP_KERNEL, 311 mt7601u_complete_urb, &cmpl); 312 if (ret) 313 return ret; 314 315 if (!wait_for_completion_timeout(&cmpl, msecs_to_jiffies(1000))) { 316 dev_err(dev->dev, "Error: firmware upload timed out\n"); 317 usb_kill_urb(buf.urb); 318 return -ETIMEDOUT; 319 } 320 if (mt7601u_urb_has_error(buf.urb)) { 321 dev_err(dev->dev, "Error: firmware upload urb failed:%d\n", 322 buf.urb->status); 323 return buf.urb->status; 324 } 325 326 val = mt7601u_rr(dev, MT_TX_CPU_FROM_FCE_CPU_DESC_IDX); 327 val++; 328 mt7601u_wr(dev, MT_TX_CPU_FROM_FCE_CPU_DESC_IDX, val); 329 330 return 0; 331 } 332 333 static int 334 mt7601u_dma_fw(struct mt7601u_dev *dev, struct mt7601u_dma_buf *dma_buf, 335 const void *data, int len, u32 dst_addr) 336 { 337 int n, ret; 338 339 if (len == 0) 340 return 0; 341 342 n = min(MCU_FW_URB_MAX_PAYLOAD, len); 343 ret = __mt7601u_dma_fw(dev, dma_buf, data, n, dst_addr); 344 if (ret) 345 return ret; 346 347 if (!mt76_poll_msec(dev, MT_MCU_COM_REG1, BIT(31), BIT(31), 500)) 348 return -ETIMEDOUT; 349 350 return mt7601u_dma_fw(dev, dma_buf, data + n, len - n, dst_addr + n); 351 } 352 353 static int 354 mt7601u_upload_firmware(struct mt7601u_dev *dev, const struct mt76_fw *fw) 355 { 356 struct mt7601u_dma_buf dma_buf; 357 void *ivb; 358 u32 ilm_len, dlm_len; 359 int i, ret; 360 361 ivb = kmemdup(fw->ivb, sizeof(fw->ivb), GFP_KERNEL); 362 if (!ivb) 363 return -ENOMEM; 364 if (mt7601u_usb_alloc_buf(dev, MCU_FW_URB_SIZE, &dma_buf)) { 365 ret = -ENOMEM; 366 goto error; 367 } 368 369 ilm_len = le32_to_cpu(fw->hdr.ilm_len) - sizeof(fw->ivb); 370 dev_dbg(dev->dev, "loading FW - ILM %u + IVB %zu\n", 371 ilm_len, sizeof(fw->ivb)); 372 ret = mt7601u_dma_fw(dev, &dma_buf, fw->ilm, ilm_len, sizeof(fw->ivb)); 373 if (ret) 374 goto error; 375 376 dlm_len = le32_to_cpu(fw->hdr.dlm_len); 377 dev_dbg(dev->dev, "loading FW - DLM %u\n", dlm_len); 378 ret = mt7601u_dma_fw(dev, &dma_buf, fw->ilm + ilm_len, 379 dlm_len, MT_MCU_DLM_OFFSET); 380 if (ret) 381 goto error; 382 383 ret = mt7601u_vendor_request(dev, MT_VEND_DEV_MODE, USB_DIR_OUT, 384 0x12, 0, ivb, sizeof(fw->ivb)); 385 if (ret < 0) 386 goto error; 387 ret = 0; 388 389 for (i = 100; i && !firmware_running(dev); i--) 390 msleep(10); 391 if (!i) { 392 ret = -ETIMEDOUT; 393 goto error; 394 } 395 396 dev_dbg(dev->dev, "Firmware running!\n"); 397 error: 398 kfree(ivb); 399 mt7601u_usb_free_buf(dev, &dma_buf); 400 401 return ret; 402 } 403 404 static int mt7601u_load_firmware(struct mt7601u_dev *dev) 405 { 406 const struct firmware *fw; 407 const struct mt76_fw_header *hdr; 408 int len, ret; 409 u32 val; 410 411 mt7601u_wr(dev, MT_USB_DMA_CFG, (MT_USB_DMA_CFG_RX_BULK_EN | 412 MT_USB_DMA_CFG_TX_BULK_EN)); 413 414 if (firmware_running(dev)) 415 return firmware_request_cache(dev->dev, MT7601U_FIRMWARE); 416 417 ret = request_firmware(&fw, MT7601U_FIRMWARE, dev->dev); 418 if (ret) 419 return ret; 420 421 if (!fw || !fw->data || fw->size < sizeof(*hdr)) 422 goto err_inv_fw; 423 424 hdr = (const struct mt76_fw_header *) fw->data; 425 426 if (le32_to_cpu(hdr->ilm_len) <= MT_MCU_IVB_SIZE) 427 goto err_inv_fw; 428 429 len = sizeof(*hdr); 430 len += le32_to_cpu(hdr->ilm_len); 431 len += le32_to_cpu(hdr->dlm_len); 432 433 if (fw->size != len) 434 goto err_inv_fw; 435 436 val = le16_to_cpu(hdr->fw_ver); 437 dev_info(dev->dev, 438 "Firmware Version: %d.%d.%02d Build: %x Build time: %.16s\n", 439 (val >> 12) & 0xf, (val >> 8) & 0xf, val & 0xf, 440 le16_to_cpu(hdr->build_ver), hdr->build_time); 441 442 len = le32_to_cpu(hdr->ilm_len); 443 444 mt7601u_wr(dev, 0x94c, 0); 445 mt7601u_wr(dev, MT_FCE_PSE_CTRL, 0); 446 447 mt7601u_vendor_reset(dev); 448 msleep(5); 449 450 mt7601u_wr(dev, 0xa44, 0); 451 mt7601u_wr(dev, 0x230, 0x84210); 452 mt7601u_wr(dev, 0x400, 0x80c00); 453 mt7601u_wr(dev, 0x800, 1); 454 455 mt7601u_rmw(dev, MT_PBF_CFG, 0, (MT_PBF_CFG_TX0Q_EN | 456 MT_PBF_CFG_TX1Q_EN | 457 MT_PBF_CFG_TX2Q_EN | 458 MT_PBF_CFG_TX3Q_EN)); 459 460 mt7601u_wr(dev, MT_FCE_PSE_CTRL, 1); 461 462 mt7601u_wr(dev, MT_USB_DMA_CFG, (MT_USB_DMA_CFG_RX_BULK_EN | 463 MT_USB_DMA_CFG_TX_BULK_EN)); 464 val = mt76_set(dev, MT_USB_DMA_CFG, MT_USB_DMA_CFG_TX_CLR); 465 val &= ~MT_USB_DMA_CFG_TX_CLR; 466 mt7601u_wr(dev, MT_USB_DMA_CFG, val); 467 468 /* FCE tx_fs_base_ptr */ 469 mt7601u_wr(dev, MT_TX_CPU_FROM_FCE_BASE_PTR, 0x400230); 470 /* FCE tx_fs_max_cnt */ 471 mt7601u_wr(dev, MT_TX_CPU_FROM_FCE_MAX_COUNT, 1); 472 /* FCE pdma enable */ 473 mt7601u_wr(dev, MT_FCE_PDMA_GLOBAL_CONF, 0x44); 474 /* FCE skip_fs_en */ 475 mt7601u_wr(dev, MT_FCE_SKIP_FS, 3); 476 477 ret = mt7601u_upload_firmware(dev, (const struct mt76_fw *)fw->data); 478 479 release_firmware(fw); 480 481 return ret; 482 483 err_inv_fw: 484 dev_err(dev->dev, "Invalid firmware image\n"); 485 release_firmware(fw); 486 return -ENOENT; 487 } 488 489 int mt7601u_mcu_init(struct mt7601u_dev *dev) 490 { 491 int ret; 492 493 mutex_init(&dev->mcu.mutex); 494 495 ret = mt7601u_load_firmware(dev); 496 if (ret) 497 return ret; 498 499 set_bit(MT7601U_STATE_MCU_RUNNING, &dev->state); 500 501 return 0; 502 } 503 504 int mt7601u_mcu_cmd_init(struct mt7601u_dev *dev) 505 { 506 int ret; 507 508 ret = mt7601u_mcu_function_select(dev, Q_SELECT, 1); 509 if (ret) 510 return ret; 511 512 init_completion(&dev->mcu.resp_cmpl); 513 if (mt7601u_usb_alloc_buf(dev, MCU_RESP_URB_SIZE, &dev->mcu.resp)) { 514 mt7601u_usb_free_buf(dev, &dev->mcu.resp); 515 return -ENOMEM; 516 } 517 518 ret = mt7601u_usb_submit_buf(dev, USB_DIR_IN, MT_EP_IN_CMD_RESP, 519 &dev->mcu.resp, GFP_KERNEL, 520 mt7601u_complete_urb, &dev->mcu.resp_cmpl); 521 if (ret) { 522 mt7601u_usb_free_buf(dev, &dev->mcu.resp); 523 return ret; 524 } 525 526 return 0; 527 } 528 529 void mt7601u_mcu_cmd_deinit(struct mt7601u_dev *dev) 530 { 531 usb_kill_urb(dev->mcu.resp.urb); 532 mt7601u_usb_free_buf(dev, &dev->mcu.resp); 533 } 534