/drivers/net/wireless/wl1251/cmd.c

  1#include "cmd.h"
  2
  3#include <linux/module.h>
  4#include <linux/slab.h>
  5#include <linux/crc7.h>
  6
  7#include "wl1251.h"
  8#include "reg.h"
  9#include "io.h"
 10#include "ps.h"
 11#include "acx.h"
 12
 13/**
 14 * send command to firmware
 15 *
 16 * @wl: wl struct
 17 * @id: command id
 18 * @buf: buffer containing the command, must work with dma
 19 * @len: length of the buffer
 20 */
 21int wl1251_cmd_send(struct wl1251 *wl, u16 id, void *buf, size_t len)
 22{
 23	struct wl1251_cmd_header *cmd;
 24	unsigned long timeout;
 25	u32 intr;
 26	int ret = 0;
 27
 28	cmd = buf;
 29	cmd->id = id;
 30	cmd->status = 0;
 31
 32	WARN_ON(len % 4 != 0);
 33
 34	wl1251_mem_write(wl, wl->cmd_box_addr, buf, len);
 35
 36	wl1251_reg_write32(wl, ACX_REG_INTERRUPT_TRIG, INTR_TRIG_CMD);
 37
 38	timeout = jiffies + msecs_to_jiffies(WL1251_COMMAND_TIMEOUT);
 39
 40	intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_NO_CLEAR);
 41	while (!(intr & WL1251_ACX_INTR_CMD_COMPLETE)) {
 42		if (time_after(jiffies, timeout)) {
 43			wl1251_error("command complete timeout");
 44			ret = -ETIMEDOUT;
 45			goto out;
 46		}
 47
 48		msleep(1);
 49
 50		intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_NO_CLEAR);
 51	}
 52
 53	wl1251_reg_write32(wl, ACX_REG_INTERRUPT_ACK,
 54			   WL1251_ACX_INTR_CMD_COMPLETE);
 55
 56out:
 57	return ret;
 58}
 59
 60/**
 61 * send test command to firmware
 62 *
 63 * @wl: wl struct
 64 * @buf: buffer containing the command, with all headers, must work with dma
 65 * @len: length of the buffer
 66 * @answer: is answer needed
 67 */
 68int wl1251_cmd_test(struct wl1251 *wl, void *buf, size_t buf_len, u8 answer)
 69{
 70	int ret;
 71
 72	wl1251_debug(DEBUG_CMD, "cmd test");
 73
 74	ret = wl1251_cmd_send(wl, CMD_TEST, buf, buf_len);
 75
 76	if (ret < 0) {
 77		wl1251_warning("TEST command failed");
 78		return ret;
 79	}
 80
 81	if (answer) {
 82		struct wl1251_command *cmd_answer;
 83
 84		/*
 85		 * The test command got in, we can read the answer.
 86		 * The answer would be a wl1251_command, where the
 87		 * parameter array contains the actual answer.
 88		 */
 89		wl1251_mem_read(wl, wl->cmd_box_addr, buf, buf_len);
 90
 91		cmd_answer = buf;
 92
 93		if (cmd_answer->header.status != CMD_STATUS_SUCCESS)
 94			wl1251_error("TEST command answer error: %d",
 95				     cmd_answer->header.status);
 96	}
 97
 98	return 0;
 99}
100
101/**
102 * read acx from firmware
103 *
104 * @wl: wl struct
105 * @id: acx id
106 * @buf: buffer for the response, including all headers, must work with dma
107 * @len: length of buf
108 */
109int wl1251_cmd_interrogate(struct wl1251 *wl, u16 id, void *buf, size_t len)
110{
111	struct acx_header *acx = buf;
112	int ret;
113
114	wl1251_debug(DEBUG_CMD, "cmd interrogate");
115
116	acx->id = id;
117
118	/* payload length, does not include any headers */
119	acx->len = len - sizeof(*acx);
120
121	ret = wl1251_cmd_send(wl, CMD_INTERROGATE, acx, sizeof(*acx));
122	if (ret < 0) {
123		wl1251_error("INTERROGATE command failed");
124		goto out;
125	}
126
127	/* the interrogate command got in, we can read the answer */
128	wl1251_mem_read(wl, wl->cmd_box_addr, buf, len);
129
130	acx = buf;
131	if (acx->cmd.status != CMD_STATUS_SUCCESS)
132		wl1251_error("INTERROGATE command error: %d",
133			     acx->cmd.status);
134
135out:
136	return ret;
137}
138
139/**
140 * write acx value to firmware
141 *
142 * @wl: wl struct
143 * @id: acx id
144 * @buf: buffer containing acx, including all headers, must work with dma
145 * @len: length of buf
146 */
147int wl1251_cmd_configure(struct wl1251 *wl, u16 id, void *buf, size_t len)
148{
149	struct acx_header *acx = buf;
150	int ret;
151
152	wl1251_debug(DEBUG_CMD, "cmd configure");
153
154	acx->id = id;
155
156	/* payload length, does not include any headers */
157	acx->len = len - sizeof(*acx);
158
159	ret = wl1251_cmd_send(wl, CMD_CONFIGURE, acx, len);
160	if (ret < 0) {
161		wl1251_warning("CONFIGURE command NOK");
162		return ret;
163	}
164
165	return 0;
166}
167
168int wl1251_cmd_vbm(struct wl1251 *wl, u8 identity,
169		   void *bitmap, u16 bitmap_len, u8 bitmap_control)
170{
171	struct wl1251_cmd_vbm_update *vbm;
172	int ret;
173
174	wl1251_debug(DEBUG_CMD, "cmd vbm");
175
176	vbm = kzalloc(sizeof(*vbm), GFP_KERNEL);
177	if (!vbm) {
178		ret = -ENOMEM;
179		goto out;
180	}
181
182	/* Count and period will be filled by the target */
183	vbm->tim.bitmap_ctrl = bitmap_control;
184	if (bitmap_len > PARTIAL_VBM_MAX) {
185		wl1251_warning("cmd vbm len is %d B, truncating to %d",
186			       bitmap_len, PARTIAL_VBM_MAX);
187		bitmap_len = PARTIAL_VBM_MAX;
188	}
189	memcpy(vbm->tim.pvb_field, bitmap, bitmap_len);
190	vbm->tim.identity = identity;
191	vbm->tim.length = bitmap_len + 3;
192
193	vbm->len = cpu_to_le16(bitmap_len + 5);
194
195	ret = wl1251_cmd_send(wl, CMD_VBM, vbm, sizeof(*vbm));
196	if (ret < 0) {
197		wl1251_error("VBM command failed");
198		goto out;
199	}
200
201out:
202	kfree(vbm);
203	return ret;
204}
205
206int wl1251_cmd_data_path(struct wl1251 *wl, u8 channel, bool enable)
207{
208	struct cmd_enabledisable_path *cmd;
209	int ret;
210	u16 cmd_rx, cmd_tx;
211
212	wl1251_debug(DEBUG_CMD, "cmd data path");
213
214	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
215	if (!cmd) {
216		ret = -ENOMEM;
217		goto out;
218	}
219
220	cmd->channel = channel;
221
222	if (enable) {
223		cmd_rx = CMD_ENABLE_RX;
224		cmd_tx = CMD_ENABLE_TX;
225	} else {
226		cmd_rx = CMD_DISABLE_RX;
227		cmd_tx = CMD_DISABLE_TX;
228	}
229
230	ret = wl1251_cmd_send(wl, cmd_rx, cmd, sizeof(*cmd));
231	if (ret < 0) {
232		wl1251_error("rx %s cmd for channel %d failed",
233			     enable ? "start" : "stop", channel);
234		goto out;
235	}
236
237	wl1251_debug(DEBUG_BOOT, "rx %s cmd channel %d",
238		     enable ? "start" : "stop", channel);
239
240	ret = wl1251_cmd_send(wl, cmd_tx, cmd, sizeof(*cmd));
241	if (ret < 0) {
242		wl1251_error("tx %s cmd for channel %d failed",
243			     enable ? "start" : "stop", channel);
244		goto out;
245	}
246
247	wl1251_debug(DEBUG_BOOT, "tx %s cmd channel %d",
248		     enable ? "start" : "stop", channel);
249
250out:
251	kfree(cmd);
252	return ret;
253}
254
255int wl1251_cmd_join(struct wl1251 *wl, u8 bss_type, u8 channel,
256		    u16 beacon_interval, u8 dtim_interval)
257{
258	struct cmd_join *join;
259	int ret, i;
260	u8 *bssid;
261
262	join = kzalloc(sizeof(*join), GFP_KERNEL);
263	if (!join) {
264		ret = -ENOMEM;
265		goto out;
266	}
267
268	wl1251_debug(DEBUG_CMD, "cmd join%s ch %d %d/%d",
269		     bss_type == BSS_TYPE_IBSS ? " ibss" : "",
270		     channel, beacon_interval, dtim_interval);
271
272	/* Reverse order BSSID */
273	bssid = (u8 *) &join->bssid_lsb;
274	for (i = 0; i < ETH_ALEN; i++)
275		bssid[i] = wl->bssid[ETH_ALEN - i - 1];
276
277	join->rx_config_options = wl->rx_config;
278	join->rx_filter_options = wl->rx_filter;
279
280	/*
281	 * FIXME: disable temporarily all filters because after commit
282	 * 9cef8737 "mac80211: fix managed mode BSSID handling" broke
283	 * association. The filter logic needs to be implemented properly
284	 * and once that is done, this hack can be removed.
285	 */
286	join->rx_config_options = 0;
287	join->rx_filter_options = WL1251_DEFAULT_RX_FILTER;
288
289	join->basic_rate_set = RATE_MASK_1MBPS | RATE_MASK_2MBPS |
290		RATE_MASK_5_5MBPS | RATE_MASK_11MBPS;
291
292	join->beacon_interval = beacon_interval;
293	join->dtim_interval = dtim_interval;
294	join->bss_type = bss_type;
295	join->channel = channel;
296	join->ctrl = JOIN_CMD_CTRL_TX_FLUSH;
297
298	ret = wl1251_cmd_send(wl, CMD_START_JOIN, join, sizeof(*join));
299	if (ret < 0) {
300		wl1251_error("failed to initiate cmd join");
301		goto out;
302	}
303
304out:
305	kfree(join);
306	return ret;
307}
308
309int wl1251_cmd_ps_mode(struct wl1251 *wl, u8 ps_mode)
310{
311	struct wl1251_cmd_ps_params *ps_params = NULL;
312	int ret = 0;
313
314	wl1251_debug(DEBUG_CMD, "cmd set ps mode");
315
316	ps_params = kzalloc(sizeof(*ps_params), GFP_KERNEL);
317	if (!ps_params) {
318		ret = -ENOMEM;
319		goto out;
320	}
321
322	ps_params->ps_mode = ps_mode;
323	ps_params->send_null_data = 1;
324	ps_params->retries = 5;
325	ps_params->hang_over_period = 128;
326	ps_params->null_data_rate = 1; /* 1 Mbps */
327
328	ret = wl1251_cmd_send(wl, CMD_SET_PS_MODE, ps_params,
329			      sizeof(*ps_params));
330	if (ret < 0) {
331		wl1251_error("cmd set_ps_mode failed");
332		goto out;
333	}
334
335out:
336	kfree(ps_params);
337	return ret;
338}
339
340int wl1251_cmd_read_memory(struct wl1251 *wl, u32 addr, void *answer,
341			   size_t len)
342{
343	struct cmd_read_write_memory *cmd;
344	int ret = 0;
345
346	wl1251_debug(DEBUG_CMD, "cmd read memory");
347
348	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
349	if (!cmd) {
350		ret = -ENOMEM;
351		goto out;
352	}
353
354	WARN_ON(len > MAX_READ_SIZE);
355	len = min_t(size_t, len, MAX_READ_SIZE);
356
357	cmd->addr = addr;
358	cmd->size = len;
359
360	ret = wl1251_cmd_send(wl, CMD_READ_MEMORY, cmd, sizeof(*cmd));
361	if (ret < 0) {
362		wl1251_error("read memory command failed: %d", ret);
363		goto out;
364	}
365
366	/* the read command got in, we can now read the answer */
367	wl1251_mem_read(wl, wl->cmd_box_addr, cmd, sizeof(*cmd));
368
369	if (cmd->header.status != CMD_STATUS_SUCCESS)
370		wl1251_error("error in read command result: %d",
371			     cmd->header.status);
372
373	memcpy(answer, cmd->value, len);
374
375out:
376	kfree(cmd);
377	return ret;
378}
379
380int wl1251_cmd_template_set(struct wl1251 *wl, u16 cmd_id,
381			    void *buf, size_t buf_len)
382{
383	struct wl1251_cmd_packet_template *cmd;
384	size_t cmd_len;
385	int ret = 0;
386
387	wl1251_debug(DEBUG_CMD, "cmd template %d", cmd_id);
388
389	WARN_ON(buf_len > WL1251_MAX_TEMPLATE_SIZE);
390	buf_len = min_t(size_t, buf_len, WL1251_MAX_TEMPLATE_SIZE);
391	cmd_len = ALIGN(sizeof(*cmd) + buf_len, 4);
392
393	cmd = kzalloc(cmd_len, GFP_KERNEL);
394	if (!cmd) {
395		ret = -ENOMEM;
396		goto out;
397	}
398
399	cmd->size = cpu_to_le16(buf_len);
400
401	if (buf)
402		memcpy(cmd->data, buf, buf_len);
403
404	ret = wl1251_cmd_send(wl, cmd_id, cmd, cmd_len);
405	if (ret < 0) {
406		wl1251_warning("cmd set_template failed: %d", ret);
407		goto out;
408	}
409
410out:
411	kfree(cmd);
412	return ret;
413}
414
415int wl1251_cmd_scan(struct wl1251 *wl, u8 *ssid, size_t ssid_len,
416		    struct ieee80211_channel *channels[],
417		    unsigned int n_channels, unsigned int n_probes)
418{
419	struct wl1251_cmd_scan *cmd;
420	int i, ret = 0;
421
422	wl1251_debug(DEBUG_CMD, "cmd scan");
423
424	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
425	if (!cmd)
426		return -ENOMEM;
427
428	cmd->params.rx_config_options = cpu_to_le32(CFG_RX_ALL_GOOD);
429	cmd->params.rx_filter_options = cpu_to_le32(CFG_RX_PRSP_EN |
430						    CFG_RX_MGMT_EN |
431						    CFG_RX_BCN_EN);
432	cmd->params.scan_options = 0;
433	cmd->params.num_channels = n_channels;
434	cmd->params.num_probe_requests = n_probes;
435	cmd->params.tx_rate = cpu_to_le16(1 << 1); /* 2 Mbps */
436	cmd->params.tid_trigger = 0;
437
438	for (i = 0; i < n_channels; i++) {
439		cmd->channels[i].min_duration =
440			cpu_to_le32(WL1251_SCAN_MIN_DURATION);
441		cmd->channels[i].max_duration =
442			cpu_to_le32(WL1251_SCAN_MAX_DURATION);
443		memset(&cmd->channels[i].bssid_lsb, 0xff, 4);
444		memset(&cmd->channels[i].bssid_msb, 0xff, 2);
445		cmd->channels[i].early_termination = 0;
446		cmd->channels[i].tx_power_att = 0;
447		cmd->channels[i].channel = channels[i]->hw_value;
448	}
449
450	cmd->params.ssid_len = ssid_len;
451	if (ssid)
452		memcpy(cmd->params.ssid, ssid, ssid_len);
453
454	ret = wl1251_cmd_send(wl, CMD_SCAN, cmd, sizeof(*cmd));
455	if (ret < 0) {
456		wl1251_error("cmd scan failed: %d", ret);
457		goto out;
458	}
459
460	wl1251_mem_read(wl, wl->cmd_box_addr, cmd, sizeof(*cmd));
461
462	if (cmd->header.status != CMD_STATUS_SUCCESS) {
463		wl1251_error("cmd scan status wasn't success: %d",
464			     cmd->header.status);
465		ret = -EIO;
466		goto out;
467	}
468
469out:
470	kfree(cmd);
471	return ret;
472}
473
474int wl1251_cmd_trigger_scan_to(struct wl1251 *wl, u32 timeout)
475{
476	struct wl1251_cmd_trigger_scan_to *cmd;
477	int ret;
478
479	wl1251_debug(DEBUG_CMD, "cmd trigger scan to");
480
481	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
482	if (!cmd)
483		return -ENOMEM;
484
485	cmd->timeout = timeout;
486
487	ret = wl1251_cmd_send(wl, CMD_TRIGGER_SCAN_TO, cmd, sizeof(*cmd));
488	if (ret < 0) {
489		wl1251_error("cmd trigger scan to failed: %d", ret);
490		goto out;
491	}
492
493out:
494	kfree(cmd);
495	return ret;
496}