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1/*
2 * (c) Copyright 2002-2010, Ralink Technology, Inc.
3 * Copyright (C) 2014 Felix Fietkau <nbd@openwrt.org>
4 * Copyright (C) 2015 Jakub Kicinski <kubakici@wp.pl>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2
8 * as published by the Free Software Foundation
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 */
15
16#include <linux/kernel.h>
17#include <linux/firmware.h>
18#include <linux/delay.h>
19#include <linux/usb.h>
20#include <linux/skbuff.h>
21
22#include "mt7601u.h"
23#include "dma.h"
24#include "mcu.h"
25#include "usb.h"
26#include "trace.h"
27
28#define MCU_FW_URB_MAX_PAYLOAD 0x3800
29#define MCU_FW_URB_SIZE (MCU_FW_URB_MAX_PAYLOAD + 12)
30#define MCU_RESP_URB_SIZE 1024
31
32static inline int firmware_running(struct mt7601u_dev *dev)
33{
34 return mt7601u_rr(dev, MT_MCU_COM_REG0) == 1;
35}
36
37static inline void skb_put_le32(struct sk_buff *skb, u32 val)
38{
39 put_unaligned_le32(val, skb_put(skb, 4));
40}
41
42static inline void mt7601u_dma_skb_wrap_cmd(struct sk_buff *skb,
43 u8 seq, enum mcu_cmd cmd)
44{
45 WARN_ON(mt7601u_dma_skb_wrap(skb, CPU_TX_PORT, DMA_COMMAND,
46 FIELD_PREP(MT_TXD_CMD_INFO_SEQ, seq) |
47 FIELD_PREP(MT_TXD_CMD_INFO_TYPE, cmd)));
48}
49
50static inline void trace_mt_mcu_msg_send_cs(struct mt7601u_dev *dev,
51 struct sk_buff *skb, bool need_resp)
52{
53 u32 i, csum = 0;
54
55 for (i = 0; i < skb->len / 4; i++)
56 csum ^= get_unaligned_le32(skb->data + i * 4);
57
58 trace_mt_mcu_msg_send(dev, skb, csum, need_resp);
59}
60
61static struct sk_buff *
62mt7601u_mcu_msg_alloc(struct mt7601u_dev *dev, const void *data, int len)
63{
64 struct sk_buff *skb;
65
66 WARN_ON(len % 4); /* if length is not divisible by 4 we need to pad */
67
68 skb = alloc_skb(len + MT_DMA_HDR_LEN + 4, GFP_KERNEL);
69 skb_reserve(skb, MT_DMA_HDR_LEN);
70 memcpy(skb_put(skb, len), data, len);
71
72 return skb;
73}
74
75static int mt7601u_mcu_wait_resp(struct mt7601u_dev *dev, u8 seq)
76{
77 struct urb *urb = dev->mcu.resp.urb;
78 u32 rxfce;
79 int urb_status, ret, i = 5;
80
81 while (i--) {
82 if (!wait_for_completion_timeout(&dev->mcu.resp_cmpl,
83 msecs_to_jiffies(300))) {
84 dev_warn(dev->dev, "Warning: %s retrying\n", __func__);
85 continue;
86 }
87
88 /* Make copies of important data before reusing the urb */
89 rxfce = get_unaligned_le32(dev->mcu.resp.buf);
90 urb_status = urb->status * mt7601u_urb_has_error(urb);
91
92 ret = mt7601u_usb_submit_buf(dev, USB_DIR_IN, MT_EP_IN_CMD_RESP,
93 &dev->mcu.resp, GFP_KERNEL,
94 mt7601u_complete_urb,
95 &dev->mcu.resp_cmpl);
96 if (ret)
97 return ret;
98
99 if (urb_status)
100 dev_err(dev->dev, "Error: MCU resp urb failed:%d\n",
101 urb_status);
102
103 if (FIELD_GET(MT_RXD_CMD_INFO_CMD_SEQ, rxfce) == seq &&
104 FIELD_GET(MT_RXD_CMD_INFO_EVT_TYPE, rxfce) == CMD_DONE)
105 return 0;
106
107 dev_err(dev->dev, "Error: MCU resp evt:%lx seq:%hhx-%lx!\n",
108 FIELD_GET(MT_RXD_CMD_INFO_EVT_TYPE, rxfce),
109 seq, FIELD_GET(MT_RXD_CMD_INFO_CMD_SEQ, rxfce));
110 }
111
112 dev_err(dev->dev, "Error: %s timed out\n", __func__);
113 return -ETIMEDOUT;
114}
115
116static int
117mt7601u_mcu_msg_send(struct mt7601u_dev *dev, struct sk_buff *skb,
118 enum mcu_cmd cmd, bool wait_resp)
119{
120 struct usb_device *usb_dev = mt7601u_to_usb_dev(dev);
121 unsigned cmd_pipe = usb_sndbulkpipe(usb_dev,
122 dev->out_eps[MT_EP_OUT_INBAND_CMD]);
123 int sent, ret;
124 u8 seq = 0;
125
126 if (test_bit(MT7601U_STATE_REMOVED, &dev->state))
127 return 0;
128
129 mutex_lock(&dev->mcu.mutex);
130
131 if (wait_resp)
132 while (!seq)
133 seq = ++dev->mcu.msg_seq & 0xf;
134
135 mt7601u_dma_skb_wrap_cmd(skb, seq, cmd);
136
137 if (dev->mcu.resp_cmpl.done)
138 dev_err(dev->dev, "Error: MCU response pre-completed!\n");
139
140 trace_mt_mcu_msg_send_cs(dev, skb, wait_resp);
141 trace_mt_submit_urb_sync(dev, cmd_pipe, skb->len);
142 ret = usb_bulk_msg(usb_dev, cmd_pipe, skb->data, skb->len, &sent, 500);
143 if (ret) {
144 dev_err(dev->dev, "Error: send MCU cmd failed:%d\n", ret);
145 goto out;
146 }
147 if (sent != skb->len)
148 dev_err(dev->dev, "Error: %s sent != skb->len\n", __func__);
149
150 if (wait_resp)
151 ret = mt7601u_mcu_wait_resp(dev, seq);
152out:
153 mutex_unlock(&dev->mcu.mutex);
154
155 consume_skb(skb);
156
157 return ret;
158}
159
160static int mt7601u_mcu_function_select(struct mt7601u_dev *dev,
161 enum mcu_function func, u32 val)
162{
163 struct sk_buff *skb;
164 struct {
165 __le32 id;
166 __le32 value;
167 } __packed __aligned(4) msg = {
168 .id = cpu_to_le32(func),
169 .value = cpu_to_le32(val),
170 };
171
172 skb = mt7601u_mcu_msg_alloc(dev, &msg, sizeof(msg));
173 return mt7601u_mcu_msg_send(dev, skb, CMD_FUN_SET_OP, func == 5);
174}
175
176int mt7601u_mcu_tssi_read_kick(struct mt7601u_dev *dev, int use_hvga)
177{
178 int ret;
179
180 if (!test_bit(MT7601U_STATE_MCU_RUNNING, &dev->state))
181 return 0;
182
183 ret = mt7601u_mcu_function_select(dev, ATOMIC_TSSI_SETTING,
184 use_hvga);
185 if (ret) {
186 dev_warn(dev->dev, "Warning: MCU TSSI read kick failed\n");
187 return ret;
188 }
189
190 dev->tssi_read_trig = true;
191
192 return 0;
193}
194
195int
196mt7601u_mcu_calibrate(struct mt7601u_dev *dev, enum mcu_calibrate cal, u32 val)
197{
198 struct sk_buff *skb;
199 struct {
200 __le32 id;
201 __le32 value;
202 } __packed __aligned(4) msg = {
203 .id = cpu_to_le32(cal),
204 .value = cpu_to_le32(val),
205 };
206
207 skb = mt7601u_mcu_msg_alloc(dev, &msg, sizeof(msg));
208 return mt7601u_mcu_msg_send(dev, skb, CMD_CALIBRATION_OP, true);
209}
210
211int mt7601u_write_reg_pairs(struct mt7601u_dev *dev, u32 base,
212 const struct mt76_reg_pair *data, int n)
213{
214 const int max_vals_per_cmd = INBAND_PACKET_MAX_LEN / 8;
215 struct sk_buff *skb;
216 int cnt, i, ret;
217
218 if (!n)
219 return 0;
220
221 cnt = min(max_vals_per_cmd, n);
222
223 skb = alloc_skb(cnt * 8 + MT_DMA_HDR_LEN + 4, GFP_KERNEL);
224 if (!skb)
225 return -ENOMEM;
226 skb_reserve(skb, MT_DMA_HDR_LEN);
227
228 for (i = 0; i < cnt; i++) {
229 skb_put_le32(skb, base + data[i].reg);
230 skb_put_le32(skb, data[i].value);
231 }
232
233 ret = mt7601u_mcu_msg_send(dev, skb, CMD_RANDOM_WRITE, cnt == n);
234 if (ret)
235 return ret;
236
237 return mt7601u_write_reg_pairs(dev, base, data + cnt, n - cnt);
238}
239
240int mt7601u_burst_write_regs(struct mt7601u_dev *dev, u32 offset,
241 const u32 *data, int n)
242{
243 const int max_regs_per_cmd = INBAND_PACKET_MAX_LEN / 4 - 1;
244 struct sk_buff *skb;
245 int cnt, i, ret;
246
247 if (!n)
248 return 0;
249
250 cnt = min(max_regs_per_cmd, n);
251
252 skb = alloc_skb(cnt * 4 + MT_DMA_HDR_LEN + 4, GFP_KERNEL);
253 if (!skb)
254 return -ENOMEM;
255 skb_reserve(skb, MT_DMA_HDR_LEN);
256
257 skb_put_le32(skb, MT_MCU_MEMMAP_WLAN + offset);
258 for (i = 0; i < cnt; i++)
259 skb_put_le32(skb, data[i]);
260
261 ret = mt7601u_mcu_msg_send(dev, skb, CMD_BURST_WRITE, cnt == n);
262 if (ret)
263 return ret;
264
265 return mt7601u_burst_write_regs(dev, offset + cnt * 4,
266 data + cnt, n - cnt);
267}
268
269struct mt76_fw_header {
270 __le32 ilm_len;
271 __le32 dlm_len;
272 __le16 build_ver;
273 __le16 fw_ver;
274 u8 pad[4];
275 char build_time[16];
276};
277
278struct mt76_fw {
279 struct mt76_fw_header hdr;
280 u8 ivb[MT_MCU_IVB_SIZE];
281 u8 ilm[];
282};
283
284static int __mt7601u_dma_fw(struct mt7601u_dev *dev,
285 const struct mt7601u_dma_buf *dma_buf,
286 const void *data, u32 len, u32 dst_addr)
287{
288 DECLARE_COMPLETION_ONSTACK(cmpl);
289 struct mt7601u_dma_buf buf = *dma_buf; /* we need to fake length */
290 __le32 reg;
291 u32 val;
292 int ret;
293
294 reg = cpu_to_le32(FIELD_PREP(MT_TXD_INFO_TYPE, DMA_PACKET) |
295 FIELD_PREP(MT_TXD_INFO_D_PORT, CPU_TX_PORT) |
296 FIELD_PREP(MT_TXD_INFO_LEN, len));
297 memcpy(buf.buf, ®, sizeof(reg));
298 memcpy(buf.buf + sizeof(reg), data, len);
299 memset(buf.buf + sizeof(reg) + len, 0, 8);
300
301 ret = mt7601u_vendor_single_wr(dev, MT_VEND_WRITE_FCE,
302 MT_FCE_DMA_ADDR, dst_addr);
303 if (ret)
304 return ret;
305 len = roundup(len, 4);
306 ret = mt7601u_vendor_single_wr(dev, MT_VEND_WRITE_FCE,
307 MT_FCE_DMA_LEN, len << 16);
308 if (ret)
309 return ret;
310
311 buf.len = MT_DMA_HDR_LEN + len + 4;
312 ret = mt7601u_usb_submit_buf(dev, USB_DIR_OUT, MT_EP_OUT_INBAND_CMD,
313 &buf, GFP_KERNEL,
314 mt7601u_complete_urb, &cmpl);
315 if (ret)
316 return ret;
317
318 if (!wait_for_completion_timeout(&cmpl, msecs_to_jiffies(1000))) {
319 dev_err(dev->dev, "Error: firmware upload timed out\n");
320 usb_kill_urb(buf.urb);
321 return -ETIMEDOUT;
322 }
323 if (mt7601u_urb_has_error(buf.urb)) {
324 dev_err(dev->dev, "Error: firmware upload urb failed:%d\n",
325 buf.urb->status);
326 return buf.urb->status;
327 }
328
329 val = mt7601u_rr(dev, MT_TX_CPU_FROM_FCE_CPU_DESC_IDX);
330 val++;
331 mt7601u_wr(dev, MT_TX_CPU_FROM_FCE_CPU_DESC_IDX, val);
332
333 return 0;
334}
335
336static int
337mt7601u_dma_fw(struct mt7601u_dev *dev, struct mt7601u_dma_buf *dma_buf,
338 const void *data, int len, u32 dst_addr)
339{
340 int n, ret;
341
342 if (len == 0)
343 return 0;
344
345 n = min(MCU_FW_URB_MAX_PAYLOAD, len);
346 ret = __mt7601u_dma_fw(dev, dma_buf, data, n, dst_addr);
347 if (ret)
348 return ret;
349
350 if (!mt76_poll_msec(dev, MT_MCU_COM_REG1, BIT(31), BIT(31), 500))
351 return -ETIMEDOUT;
352
353 return mt7601u_dma_fw(dev, dma_buf, data + n, len - n, dst_addr + n);
354}
355
356static int
357mt7601u_upload_firmware(struct mt7601u_dev *dev, const struct mt76_fw *fw)
358{
359 struct mt7601u_dma_buf dma_buf;
360 void *ivb;
361 u32 ilm_len, dlm_len;
362 int i, ret;
363
364 ivb = kmemdup(fw->ivb, sizeof(fw->ivb), GFP_KERNEL);
365 if (!ivb)
366 return -ENOMEM;
367 if (mt7601u_usb_alloc_buf(dev, MCU_FW_URB_SIZE, &dma_buf)) {
368 ret = -ENOMEM;
369 goto error;
370 }
371
372 ilm_len = le32_to_cpu(fw->hdr.ilm_len) - sizeof(fw->ivb);
373 dev_dbg(dev->dev, "loading FW - ILM %u + IVB %zu\n",
374 ilm_len, sizeof(fw->ivb));
375 ret = mt7601u_dma_fw(dev, &dma_buf, fw->ilm, ilm_len, sizeof(fw->ivb));
376 if (ret)
377 goto error;
378
379 dlm_len = le32_to_cpu(fw->hdr.dlm_len);
380 dev_dbg(dev->dev, "loading FW - DLM %u\n", dlm_len);
381 ret = mt7601u_dma_fw(dev, &dma_buf, fw->ilm + ilm_len,
382 dlm_len, MT_MCU_DLM_OFFSET);
383 if (ret)
384 goto error;
385
386 ret = mt7601u_vendor_request(dev, MT_VEND_DEV_MODE, USB_DIR_OUT,
387 0x12, 0, ivb, sizeof(fw->ivb));
388 if (ret < 0)
389 goto error;
390 ret = 0;
391
392 for (i = 100; i && !firmware_running(dev); i--)
393 msleep(10);
394 if (!i) {
395 ret = -ETIMEDOUT;
396 goto error;
397 }
398
399 dev_dbg(dev->dev, "Firmware running!\n");
400error:
401 kfree(ivb);
402 mt7601u_usb_free_buf(dev, &dma_buf);
403
404 return ret;
405}
406
407static int mt7601u_load_firmware(struct mt7601u_dev *dev)
408{
409 const struct firmware *fw;
410 const struct mt76_fw_header *hdr;
411 int len, ret;
412 u32 val;
413
414 mt7601u_wr(dev, MT_USB_DMA_CFG, (MT_USB_DMA_CFG_RX_BULK_EN |
415 MT_USB_DMA_CFG_TX_BULK_EN));
416
417 if (firmware_running(dev))
418 return 0;
419
420 ret = request_firmware(&fw, MT7601U_FIRMWARE, dev->dev);
421 if (ret)
422 return ret;
423
424 if (!fw || !fw->data || fw->size < sizeof(*hdr))
425 goto err_inv_fw;
426
427 hdr = (const struct mt76_fw_header *) fw->data;
428
429 if (le32_to_cpu(hdr->ilm_len) <= MT_MCU_IVB_SIZE)
430 goto err_inv_fw;
431
432 len = sizeof(*hdr);
433 len += le32_to_cpu(hdr->ilm_len);
434 len += le32_to_cpu(hdr->dlm_len);
435
436 if (fw->size != len)
437 goto err_inv_fw;
438
439 val = le16_to_cpu(hdr->fw_ver);
440 dev_info(dev->dev,
441 "Firmware Version: %d.%d.%02d Build: %x Build time: %.16s\n",
442 (val >> 12) & 0xf, (val >> 8) & 0xf, val & 0xf,
443 le16_to_cpu(hdr->build_ver), hdr->build_time);
444
445 len = le32_to_cpu(hdr->ilm_len);
446
447 mt7601u_wr(dev, 0x94c, 0);
448 mt7601u_wr(dev, MT_FCE_PSE_CTRL, 0);
449
450 mt7601u_vendor_reset(dev);
451 msleep(5);
452
453 mt7601u_wr(dev, 0xa44, 0);
454 mt7601u_wr(dev, 0x230, 0x84210);
455 mt7601u_wr(dev, 0x400, 0x80c00);
456 mt7601u_wr(dev, 0x800, 1);
457
458 mt7601u_rmw(dev, MT_PBF_CFG, 0, (MT_PBF_CFG_TX0Q_EN |
459 MT_PBF_CFG_TX1Q_EN |
460 MT_PBF_CFG_TX2Q_EN |
461 MT_PBF_CFG_TX3Q_EN));
462
463 mt7601u_wr(dev, MT_FCE_PSE_CTRL, 1);
464
465 mt7601u_wr(dev, MT_USB_DMA_CFG, (MT_USB_DMA_CFG_RX_BULK_EN |
466 MT_USB_DMA_CFG_TX_BULK_EN));
467 val = mt76_set(dev, MT_USB_DMA_CFG, MT_USB_DMA_CFG_TX_CLR);
468 val &= ~MT_USB_DMA_CFG_TX_CLR;
469 mt7601u_wr(dev, MT_USB_DMA_CFG, val);
470
471 /* FCE tx_fs_base_ptr */
472 mt7601u_wr(dev, MT_TX_CPU_FROM_FCE_BASE_PTR, 0x400230);
473 /* FCE tx_fs_max_cnt */
474 mt7601u_wr(dev, MT_TX_CPU_FROM_FCE_MAX_COUNT, 1);
475 /* FCE pdma enable */
476 mt7601u_wr(dev, MT_FCE_PDMA_GLOBAL_CONF, 0x44);
477 /* FCE skip_fs_en */
478 mt7601u_wr(dev, MT_FCE_SKIP_FS, 3);
479
480 ret = mt7601u_upload_firmware(dev, (const struct mt76_fw *)fw->data);
481
482 release_firmware(fw);
483
484 return ret;
485
486err_inv_fw:
487 dev_err(dev->dev, "Invalid firmware image\n");
488 release_firmware(fw);
489 return -ENOENT;
490}
491
492int mt7601u_mcu_init(struct mt7601u_dev *dev)
493{
494 int ret;
495
496 mutex_init(&dev->mcu.mutex);
497
498 ret = mt7601u_load_firmware(dev);
499 if (ret)
500 return ret;
501
502 set_bit(MT7601U_STATE_MCU_RUNNING, &dev->state);
503
504 return 0;
505}
506
507int mt7601u_mcu_cmd_init(struct mt7601u_dev *dev)
508{
509 int ret;
510
511 ret = mt7601u_mcu_function_select(dev, Q_SELECT, 1);
512 if (ret)
513 return ret;
514
515 init_completion(&dev->mcu.resp_cmpl);
516 if (mt7601u_usb_alloc_buf(dev, MCU_RESP_URB_SIZE, &dev->mcu.resp)) {
517 mt7601u_usb_free_buf(dev, &dev->mcu.resp);
518 return -ENOMEM;
519 }
520
521 ret = mt7601u_usb_submit_buf(dev, USB_DIR_IN, MT_EP_IN_CMD_RESP,
522 &dev->mcu.resp, GFP_KERNEL,
523 mt7601u_complete_urb, &dev->mcu.resp_cmpl);
524 if (ret) {
525 mt7601u_usb_free_buf(dev, &dev->mcu.resp);
526 return ret;
527 }
528
529 return 0;
530}
531
532void mt7601u_mcu_cmd_deinit(struct mt7601u_dev *dev)
533{
534 usb_kill_urb(dev->mcu.resp.urb);
535 mt7601u_usb_free_buf(dev, &dev->mcu.resp);
536}