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14#include <linux/firmware.h>
15#include <linux/module.h>
16#include <linux/slab.h>
17#include <linux/soc/qcom/smd.h>
18#include <linux/io.h>
19#include <linux/of_platform.h>
20#include <linux/platform_device.h>
21#include <linux/soc/qcom/wcnss_ctrl.h>
22
23#define WCNSS_REQUEST_TIMEOUT (5 * HZ)
24#define WCNSS_CBC_TIMEOUT (10 * HZ)
25
26#define WCNSS_ACK_DONE_BOOTING 1
27#define WCNSS_ACK_COLD_BOOTING 2
28
29#define NV_FRAGMENT_SIZE 3072
30#define NVBIN_FILE "wlan/prima/WCNSS_qcom_wlan_nv.bin"
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40
41struct wcnss_ctrl {
42 struct device *dev;
43 struct qcom_smd_channel *channel;
44
45 struct completion ack;
46 struct completion cbc;
47 int ack_status;
48
49 struct work_struct probe_work;
50};
51
52
53enum {
54 WCNSS_VERSION_REQ = 0x01000000,
55 WCNSS_VERSION_RESP,
56 WCNSS_DOWNLOAD_NV_REQ,
57 WCNSS_DOWNLOAD_NV_RESP,
58 WCNSS_UPLOAD_CAL_REQ,
59 WCNSS_UPLOAD_CAL_RESP,
60 WCNSS_DOWNLOAD_CAL_REQ,
61 WCNSS_DOWNLOAD_CAL_RESP,
62 WCNSS_VBAT_LEVEL_IND,
63 WCNSS_BUILD_VERSION_REQ,
64 WCNSS_BUILD_VERSION_RESP,
65 WCNSS_PM_CONFIG_REQ,
66 WCNSS_CBC_COMPLETE_IND,
67};
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72
73
74struct wcnss_msg_hdr {
75 u32 type;
76 u32 len;
77} __packed;
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82
83struct wcnss_version_resp {
84 struct wcnss_msg_hdr hdr;
85 u8 major;
86 u8 minor;
87 u8 version;
88 u8 revision;
89} __packed;
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98
99struct wcnss_download_nv_req {
100 struct wcnss_msg_hdr hdr;
101 u16 seq;
102 u16 last;
103 u32 frag_size;
104 u8 fragment[];
105} __packed;
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111
112struct wcnss_download_nv_resp {
113 struct wcnss_msg_hdr hdr;
114 u8 status;
115} __packed;
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123
124
125static int wcnss_ctrl_smd_callback(struct qcom_smd_channel *channel,
126 const void *data,
127 size_t count)
128{
129 struct wcnss_ctrl *wcnss = qcom_smd_get_drvdata(channel);
130 const struct wcnss_download_nv_resp *nvresp;
131 const struct wcnss_version_resp *version;
132 const struct wcnss_msg_hdr *hdr = data;
133
134 switch (hdr->type) {
135 case WCNSS_VERSION_RESP:
136 if (count != sizeof(*version)) {
137 dev_err(wcnss->dev,
138 "invalid size of version response\n");
139 break;
140 }
141
142 version = data;
143 dev_info(wcnss->dev, "WCNSS Version %d.%d %d.%d\n",
144 version->major, version->minor,
145 version->version, version->revision);
146
147 complete(&wcnss->ack);
148 break;
149 case WCNSS_DOWNLOAD_NV_RESP:
150 if (count != sizeof(*nvresp)) {
151 dev_err(wcnss->dev,
152 "invalid size of download response\n");
153 break;
154 }
155
156 nvresp = data;
157 wcnss->ack_status = nvresp->status;
158 complete(&wcnss->ack);
159 break;
160 case WCNSS_CBC_COMPLETE_IND:
161 dev_dbg(wcnss->dev, "cold boot complete\n");
162 complete(&wcnss->cbc);
163 break;
164 default:
165 dev_info(wcnss->dev, "unknown message type %d\n", hdr->type);
166 break;
167 }
168
169 return 0;
170}
171
172
173
174
175
176static int wcnss_request_version(struct wcnss_ctrl *wcnss)
177{
178 struct wcnss_msg_hdr msg;
179 int ret;
180
181 msg.type = WCNSS_VERSION_REQ;
182 msg.len = sizeof(msg);
183 ret = qcom_smd_send(wcnss->channel, &msg, sizeof(msg));
184 if (ret < 0)
185 return ret;
186
187 ret = wait_for_completion_timeout(&wcnss->ack, WCNSS_CBC_TIMEOUT);
188 if (!ret) {
189 dev_err(wcnss->dev, "timeout waiting for version response\n");
190 return -ETIMEDOUT;
191 }
192
193 return 0;
194}
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201
202
203static int wcnss_download_nv(struct wcnss_ctrl *wcnss, bool *expect_cbc)
204{
205 struct wcnss_download_nv_req *req;
206 const struct firmware *fw;
207 const void *data;
208 ssize_t left;
209 int ret;
210
211 req = kzalloc(sizeof(*req) + NV_FRAGMENT_SIZE, GFP_KERNEL);
212 if (!req)
213 return -ENOMEM;
214
215 ret = request_firmware(&fw, NVBIN_FILE, wcnss->dev);
216 if (ret < 0) {
217 dev_err(wcnss->dev, "Failed to load nv file %s: %d\n",
218 NVBIN_FILE, ret);
219 goto free_req;
220 }
221
222 data = fw->data;
223 left = fw->size;
224
225 req->hdr.type = WCNSS_DOWNLOAD_NV_REQ;
226 req->hdr.len = sizeof(*req) + NV_FRAGMENT_SIZE;
227
228 req->last = 0;
229 req->frag_size = NV_FRAGMENT_SIZE;
230
231 req->seq = 0;
232 do {
233 if (left <= NV_FRAGMENT_SIZE) {
234 req->last = 1;
235 req->frag_size = left;
236 req->hdr.len = sizeof(*req) + left;
237 }
238
239 memcpy(req->fragment, data, req->frag_size);
240
241 ret = qcom_smd_send(wcnss->channel, req, req->hdr.len);
242 if (ret < 0) {
243 dev_err(wcnss->dev, "failed to send smd packet\n");
244 goto release_fw;
245 }
246
247
248 req->seq++;
249
250 data += req->hdr.len;
251 left -= NV_FRAGMENT_SIZE;
252 } while (left > 0);
253
254 ret = wait_for_completion_timeout(&wcnss->ack, WCNSS_REQUEST_TIMEOUT);
255 if (!ret) {
256 dev_err(wcnss->dev, "timeout waiting for nv upload ack\n");
257 ret = -ETIMEDOUT;
258 } else {
259 *expect_cbc = wcnss->ack_status == WCNSS_ACK_COLD_BOOTING;
260 ret = 0;
261 }
262
263release_fw:
264 release_firmware(fw);
265free_req:
266 kfree(req);
267
268 return ret;
269}
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275
276
277struct qcom_smd_channel *qcom_wcnss_open_channel(void *wcnss, const char *name, qcom_smd_cb_t cb)
278{
279 struct wcnss_ctrl *_wcnss = wcnss;
280
281 return qcom_smd_open_channel(_wcnss->channel, name, cb);
282}
283EXPORT_SYMBOL(qcom_wcnss_open_channel);
284
285static void wcnss_async_probe(struct work_struct *work)
286{
287 struct wcnss_ctrl *wcnss = container_of(work, struct wcnss_ctrl, probe_work);
288 bool expect_cbc;
289 int ret;
290
291 ret = wcnss_request_version(wcnss);
292 if (ret < 0)
293 return;
294
295 ret = wcnss_download_nv(wcnss, &expect_cbc);
296 if (ret < 0)
297 return;
298
299
300 if (expect_cbc) {
301 ret = wait_for_completion_timeout(&wcnss->cbc, WCNSS_REQUEST_TIMEOUT);
302 if (!ret)
303 dev_err(wcnss->dev, "expected cold boot completion\n");
304 }
305
306 of_platform_populate(wcnss->dev->of_node, NULL, NULL, wcnss->dev);
307}
308
309static int wcnss_ctrl_probe(struct qcom_smd_device *sdev)
310{
311 struct wcnss_ctrl *wcnss;
312
313 wcnss = devm_kzalloc(&sdev->dev, sizeof(*wcnss), GFP_KERNEL);
314 if (!wcnss)
315 return -ENOMEM;
316
317 wcnss->dev = &sdev->dev;
318 wcnss->channel = sdev->channel;
319
320 init_completion(&wcnss->ack);
321 init_completion(&wcnss->cbc);
322 INIT_WORK(&wcnss->probe_work, wcnss_async_probe);
323
324 qcom_smd_set_drvdata(sdev->channel, wcnss);
325 dev_set_drvdata(&sdev->dev, wcnss);
326
327 schedule_work(&wcnss->probe_work);
328
329 return 0;
330}
331
332static void wcnss_ctrl_remove(struct qcom_smd_device *sdev)
333{
334 struct wcnss_ctrl *wcnss = qcom_smd_get_drvdata(sdev->channel);
335
336 cancel_work_sync(&wcnss->probe_work);
337 of_platform_depopulate(&sdev->dev);
338}
339
340static const struct of_device_id wcnss_ctrl_of_match[] = {
341 { .compatible = "qcom,wcnss", },
342 {}
343};
344
345static struct qcom_smd_driver wcnss_ctrl_driver = {
346 .probe = wcnss_ctrl_probe,
347 .remove = wcnss_ctrl_remove,
348 .callback = wcnss_ctrl_smd_callback,
349 .driver = {
350 .name = "qcom_wcnss_ctrl",
351 .owner = THIS_MODULE,
352 .of_match_table = wcnss_ctrl_of_match,
353 },
354};
355
356module_qcom_smd_driver(wcnss_ctrl_driver);
357
358MODULE_DESCRIPTION("Qualcomm WCNSS control driver");
359MODULE_LICENSE("GPL v2");
360