tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Copyright (C) 2018 Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
3 *
4 * Permission to use, copy, modify, and/or distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
7 *
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15 */
16
17#include <linux/module.h>
18#include <linux/firmware.h>
19
20#include "mt76x02.h"
21#include "mt76x02_mcu.h"
22#include "mt76x02_usb.h"
23
24#define MT_CMD_HDR_LEN 4
25
26#define MT_FCE_DMA_ADDR 0x0230
27#define MT_FCE_DMA_LEN 0x0234
28
29#define MT_TX_CPU_FROM_FCE_CPU_DESC_IDX 0x09a8
30
31static struct sk_buff *
32mt76x02u_mcu_msg_alloc(const void *data, int len)
33{
34 struct sk_buff *skb;
35
36 skb = alloc_skb(MT_CMD_HDR_LEN + len + 8, GFP_KERNEL);
37 if (!skb)
38 return NULL;
39
40 skb_reserve(skb, MT_CMD_HDR_LEN);
41 skb_put_data(skb, data, len);
42
43 return skb;
44}
45
46static void
47mt76x02u_multiple_mcu_reads(struct mt76_dev *dev, u8 *data, int len)
48{
49 struct mt76_usb *usb = &dev->usb;
50 u32 reg, val;
51 int i;
52
53 if (usb->mcu.burst) {
54 WARN_ON_ONCE(len / 4 != usb->mcu.rp_len);
55
56 reg = usb->mcu.rp[0].reg - usb->mcu.base;
57 for (i = 0; i < usb->mcu.rp_len; i++) {
58 val = get_unaligned_le32(data + 4 * i);
59 usb->mcu.rp[i].reg = reg++;
60 usb->mcu.rp[i].value = val;
61 }
62 } else {
63 WARN_ON_ONCE(len / 8 != usb->mcu.rp_len);
64
65 for (i = 0; i < usb->mcu.rp_len; i++) {
66 reg = get_unaligned_le32(data + 8 * i) -
67 usb->mcu.base;
68 val = get_unaligned_le32(data + 8 * i + 4);
69
70 WARN_ON_ONCE(usb->mcu.rp[i].reg != reg);
71 usb->mcu.rp[i].value = val;
72 }
73 }
74}
75
76static int mt76x02u_mcu_wait_resp(struct mt76_dev *dev, u8 seq)
77{
78 struct mt76_usb *usb = &dev->usb;
79 struct mt76u_buf *buf = &usb->mcu.res;
80 struct urb *urb = buf->urb;
81 int i, ret;
82 u32 rxfce;
83 u8 *data;
84
85 for (i = 0; i < 5; i++) {
86 if (!wait_for_completion_timeout(&usb->mcu.cmpl,
87 msecs_to_jiffies(300)))
88 continue;
89
90 if (urb->status)
91 return -EIO;
92
93 data = sg_virt(&urb->sg[0]);
94 if (usb->mcu.rp)
95 mt76x02u_multiple_mcu_reads(dev, data + 4,
96 urb->actual_length - 8);
97
98 rxfce = get_unaligned_le32(data);
99 ret = mt76u_submit_buf(dev, USB_DIR_IN,
100 MT_EP_IN_CMD_RESP,
101 buf, GFP_KERNEL,
102 mt76u_mcu_complete_urb,
103 &usb->mcu.cmpl);
104 if (ret)
105 return ret;
106
107 if (seq == FIELD_GET(MT_RX_FCE_INFO_CMD_SEQ, rxfce) &&
108 FIELD_GET(MT_RX_FCE_INFO_EVT_TYPE, rxfce) == EVT_CMD_DONE)
109 return 0;
110
111 dev_err(dev->dev, "error: MCU resp evt:%lx seq:%hhx-%lx\n",
112 FIELD_GET(MT_RX_FCE_INFO_EVT_TYPE, rxfce),
113 seq, FIELD_GET(MT_RX_FCE_INFO_CMD_SEQ, rxfce));
114 }
115
116 dev_err(dev->dev, "error: %s timed out\n", __func__);
117 return -ETIMEDOUT;
118}
119
120static int
121__mt76x02u_mcu_send_msg(struct mt76_dev *dev, struct sk_buff *skb,
122 int cmd, bool wait_resp)
123{
124 struct usb_interface *intf = to_usb_interface(dev->dev);
125 struct usb_device *udev = interface_to_usbdev(intf);
126 struct mt76_usb *usb = &dev->usb;
127 unsigned int pipe;
128 int ret, sent;
129 u8 seq = 0;
130 u32 info;
131
132 if (!skb)
133 return -EINVAL;
134
135 if (test_bit(MT76_REMOVED, &dev->state))
136 return 0;
137
138 pipe = usb_sndbulkpipe(udev, usb->out_ep[MT_EP_OUT_INBAND_CMD]);
139 if (wait_resp) {
140 seq = ++usb->mcu.msg_seq & 0xf;
141 if (!seq)
142 seq = ++usb->mcu.msg_seq & 0xf;
143 }
144
145 info = FIELD_PREP(MT_MCU_MSG_CMD_SEQ, seq) |
146 FIELD_PREP(MT_MCU_MSG_CMD_TYPE, cmd) |
147 MT_MCU_MSG_TYPE_CMD;
148 ret = mt76x02u_skb_dma_info(skb, CPU_TX_PORT, info);
149 if (ret)
150 return ret;
151
152 ret = usb_bulk_msg(udev, pipe, skb->data, skb->len, &sent, 500);
153 if (ret)
154 return ret;
155
156 if (wait_resp)
157 ret = mt76x02u_mcu_wait_resp(dev, seq);
158
159 consume_skb(skb);
160
161 return ret;
162}
163
164static int
165mt76x02u_mcu_send_msg(struct mt76_dev *dev, struct sk_buff *skb,
166 int cmd, bool wait_resp)
167{
168 struct mt76_usb *usb = &dev->usb;
169 int err;
170
171 mutex_lock(&usb->mcu.mutex);
172 err = __mt76x02u_mcu_send_msg(dev, skb, cmd, wait_resp);
173 mutex_unlock(&usb->mcu.mutex);
174
175 return err;
176}
177
178static inline void skb_put_le32(struct sk_buff *skb, u32 val)
179{
180 put_unaligned_le32(val, skb_put(skb, 4));
181}
182
183static int
184mt76x02u_mcu_wr_rp(struct mt76_dev *dev, u32 base,
185 const struct mt76_reg_pair *data, int n)
186{
187 const int CMD_RANDOM_WRITE = 12;
188 const int max_vals_per_cmd = MT_INBAND_PACKET_MAX_LEN / 8;
189 struct sk_buff *skb;
190 int cnt, i, ret;
191
192 if (!n)
193 return 0;
194
195 cnt = min(max_vals_per_cmd, n);
196
197 skb = alloc_skb(cnt * 8 + MT_DMA_HDR_LEN + 4, GFP_KERNEL);
198 if (!skb)
199 return -ENOMEM;
200 skb_reserve(skb, MT_DMA_HDR_LEN);
201
202 for (i = 0; i < cnt; i++) {
203 skb_put_le32(skb, base + data[i].reg);
204 skb_put_le32(skb, data[i].value);
205 }
206
207 ret = mt76x02u_mcu_send_msg(dev, skb, CMD_RANDOM_WRITE, cnt == n);
208 if (ret)
209 return ret;
210
211 return mt76x02u_mcu_wr_rp(dev, base, data + cnt, n - cnt);
212}
213
214static int
215mt76x02u_mcu_rd_rp(struct mt76_dev *dev, u32 base,
216 struct mt76_reg_pair *data, int n)
217{
218 const int CMD_RANDOM_READ = 10;
219 const int max_vals_per_cmd = MT_INBAND_PACKET_MAX_LEN / 8;
220 struct mt76_usb *usb = &dev->usb;
221 struct sk_buff *skb;
222 int cnt, i, ret;
223
224 if (!n)
225 return 0;
226
227 cnt = min(max_vals_per_cmd, n);
228 if (cnt != n)
229 return -EINVAL;
230
231 skb = alloc_skb(cnt * 8 + MT_DMA_HDR_LEN + 4, GFP_KERNEL);
232 if (!skb)
233 return -ENOMEM;
234 skb_reserve(skb, MT_DMA_HDR_LEN);
235
236 for (i = 0; i < cnt; i++) {
237 skb_put_le32(skb, base + data[i].reg);
238 skb_put_le32(skb, data[i].value);
239 }
240
241 mutex_lock(&usb->mcu.mutex);
242
243 usb->mcu.rp = data;
244 usb->mcu.rp_len = n;
245 usb->mcu.base = base;
246 usb->mcu.burst = false;
247
248 ret = __mt76x02u_mcu_send_msg(dev, skb, CMD_RANDOM_READ, true);
249
250 usb->mcu.rp = NULL;
251
252 mutex_unlock(&usb->mcu.mutex);
253
254 return ret;
255}
256
257void mt76x02u_mcu_fw_reset(struct mt76x02_dev *dev)
258{
259 mt76u_vendor_request(&dev->mt76, MT_VEND_DEV_MODE,
260 USB_DIR_OUT | USB_TYPE_VENDOR,
261 0x1, 0, NULL, 0);
262}
263EXPORT_SYMBOL_GPL(mt76x02u_mcu_fw_reset);
264
265static int
266__mt76x02u_mcu_fw_send_data(struct mt76x02_dev *dev, struct mt76u_buf *buf,
267 const void *fw_data, int len, u32 dst_addr)
268{
269 u8 *data = sg_virt(&buf->urb->sg[0]);
270 DECLARE_COMPLETION_ONSTACK(cmpl);
271 __le32 info;
272 u32 val;
273 int err;
274
275 info = cpu_to_le32(FIELD_PREP(MT_MCU_MSG_PORT, CPU_TX_PORT) |
276 FIELD_PREP(MT_MCU_MSG_LEN, len) |
277 MT_MCU_MSG_TYPE_CMD);
278
279 memcpy(data, &info, sizeof(info));
280 memcpy(data + sizeof(info), fw_data, len);
281 memset(data + sizeof(info) + len, 0, 4);
282
283 mt76u_single_wr(&dev->mt76, MT_VEND_WRITE_FCE,
284 MT_FCE_DMA_ADDR, dst_addr);
285 len = roundup(len, 4);
286 mt76u_single_wr(&dev->mt76, MT_VEND_WRITE_FCE,
287 MT_FCE_DMA_LEN, len << 16);
288
289 buf->len = MT_CMD_HDR_LEN + len + sizeof(info);
290 err = mt76u_submit_buf(&dev->mt76, USB_DIR_OUT,
291 MT_EP_OUT_INBAND_CMD,
292 buf, GFP_KERNEL,
293 mt76u_mcu_complete_urb, &cmpl);
294 if (err < 0)
295 return err;
296
297 if (!wait_for_completion_timeout(&cmpl,
298 msecs_to_jiffies(1000))) {
299 dev_err(dev->mt76.dev, "firmware upload timed out\n");
300 usb_kill_urb(buf->urb);
301 return -ETIMEDOUT;
302 }
303
304 if (mt76u_urb_error(buf->urb)) {
305 dev_err(dev->mt76.dev, "firmware upload failed: %d\n",
306 buf->urb->status);
307 return buf->urb->status;
308 }
309
310 val = mt76_rr(dev, MT_TX_CPU_FROM_FCE_CPU_DESC_IDX);
311 val++;
312 mt76_wr(dev, MT_TX_CPU_FROM_FCE_CPU_DESC_IDX, val);
313
314 return 0;
315}
316
317int mt76x02u_mcu_fw_send_data(struct mt76x02_dev *dev, const void *data,
318 int data_len, u32 max_payload, u32 offset)
319{
320 int err, len, pos = 0, max_len = max_payload - 8;
321 struct mt76u_buf buf;
322
323 err = mt76u_buf_alloc(&dev->mt76, &buf, 1, max_payload, max_payload,
324 GFP_KERNEL);
325 if (err < 0)
326 return err;
327
328 while (data_len > 0) {
329 len = min_t(int, data_len, max_len);
330 err = __mt76x02u_mcu_fw_send_data(dev, &buf, data + pos,
331 len, offset + pos);
332 if (err < 0)
333 break;
334
335 data_len -= len;
336 pos += len;
337 usleep_range(5000, 10000);
338 }
339 mt76u_buf_free(&buf);
340
341 return err;
342}
343EXPORT_SYMBOL_GPL(mt76x02u_mcu_fw_send_data);
344
345void mt76x02u_init_mcu(struct mt76_dev *dev)
346{
347 static const struct mt76_mcu_ops mt76x02u_mcu_ops = {
348 .mcu_msg_alloc = mt76x02u_mcu_msg_alloc,
349 .mcu_send_msg = mt76x02u_mcu_send_msg,
350 .mcu_wr_rp = mt76x02u_mcu_wr_rp,
351 .mcu_rd_rp = mt76x02u_mcu_rd_rp,
352 };
353
354 dev->mcu_ops = &mt76x02u_mcu_ops;
355}
356EXPORT_SYMBOL_GPL(mt76x02u_init_mcu);
357
358MODULE_AUTHOR("Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>");
359MODULE_LICENSE("Dual BSD/GPL");