cmd.c

  1// SPDX-License-Identifier: GPL-2.0
  2#include "cmd.h"
  3
  4#include <linux/module.h>
  5#include <linux/slab.h>
  6#include <linux/etherdevice.h>
  7
  8#include "wl1251.h"
  9#include "reg.h"
 10#include "io.h"
 11#include "ps.h"
 12#include "acx.h"
 13
 14/**
 15 * wl1251_cmd_send - Send command to firmware
 16 *
 17 * @wl: wl struct
 18 * @id: command id
 19 * @buf: buffer containing the command, must work with dma
 20 * @len: length of the buffer
 21 */
 22int wl1251_cmd_send(struct wl1251 *wl, u16 id, void *buf, size_t len)
 23{
 24	struct wl1251_cmd_header *cmd;
 25	unsigned long timeout;
 26	u32 intr;
 27	int ret = 0;
 28
 29	cmd = buf;
 30	cmd->id = id;
 31	cmd->status = 0;
 32
 33	WARN_ON(len % 4 != 0);
 34
 35	wl1251_mem_write(wl, wl->cmd_box_addr, buf, len);
 36
 37	wl1251_reg_write32(wl, ACX_REG_INTERRUPT_TRIG, INTR_TRIG_CMD);
 38
 39	timeout = jiffies + msecs_to_jiffies(WL1251_COMMAND_TIMEOUT);
 40
 41	intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_NO_CLEAR);
 42	while (!(intr & WL1251_ACX_INTR_CMD_COMPLETE)) {
 43		if (time_after(jiffies, timeout)) {
 44			wl1251_error("command complete timeout");
 45			ret = -ETIMEDOUT;
 46			goto out;
 47		}
 48
 49		msleep(1);
 50
 51		intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_NO_CLEAR);
 52	}
 53
 54	wl1251_reg_write32(wl, ACX_REG_INTERRUPT_ACK,
 55			   WL1251_ACX_INTR_CMD_COMPLETE);
 56
 57out:
 58	return ret;
 59}
 60
 61/**
 62 * wl1251_cmd_interrogate - Read acx from firmware
 63 *
 64 * @wl: wl struct
 65 * @id: acx id
 66 * @buf: buffer for the response, including all headers, must work with dma
 67 * @len: length of buf
 68 */
 69int wl1251_cmd_interrogate(struct wl1251 *wl, u16 id, void *buf, size_t len)
 70{
 71	struct acx_header *acx = buf;
 72	int ret;
 73
 74	wl1251_debug(DEBUG_CMD, "cmd interrogate");
 75
 76	acx->id = id;
 77
 78	/* payload length, does not include any headers */
 79	acx->len = len - sizeof(*acx);
 80
 81	ret = wl1251_cmd_send(wl, CMD_INTERROGATE, acx, sizeof(*acx));
 82	if (ret < 0) {
 83		wl1251_error("INTERROGATE command failed");
 84		goto out;
 85	}
 86
 87	/* the interrogate command got in, we can read the answer */
 88	wl1251_mem_read(wl, wl->cmd_box_addr, buf, len);
 89
 90	acx = buf;
 91	if (acx->cmd.status != CMD_STATUS_SUCCESS)
 92		wl1251_error("INTERROGATE command error: %d",
 93			     acx->cmd.status);
 94
 95out:
 96	return ret;
 97}
 98
 99/**
100 * wl1251_cmd_configure - Write acx value to firmware
101 *
102 * @wl: wl struct
103 * @id: acx id
104 * @buf: buffer containing acx, including all headers, must work with dma
105 * @len: length of buf
106 */
107int wl1251_cmd_configure(struct wl1251 *wl, u16 id, void *buf, size_t len)
108{
109	struct acx_header *acx = buf;
110	int ret;
111
112	wl1251_debug(DEBUG_CMD, "cmd configure");
113
114	acx->id = id;
115
116	/* payload length, does not include any headers */
117	acx->len = len - sizeof(*acx);
118
119	ret = wl1251_cmd_send(wl, CMD_CONFIGURE, acx, len);
120	if (ret < 0) {
121		wl1251_warning("CONFIGURE command NOK");
122		return ret;
123	}
124
125	return 0;
126}
127
128int wl1251_cmd_vbm(struct wl1251 *wl, u8 identity,
129		   void *bitmap, u16 bitmap_len, u8 bitmap_control)
130{
131	struct wl1251_cmd_vbm_update *vbm;
132	int ret;
133
134	wl1251_debug(DEBUG_CMD, "cmd vbm");
135
136	vbm = kzalloc(sizeof(*vbm), GFP_KERNEL);
137	if (!vbm)
138		return -ENOMEM;
139
140	/* Count and period will be filled by the target */
141	vbm->tim.bitmap_ctrl = bitmap_control;
142	if (bitmap_len > PARTIAL_VBM_MAX) {
143		wl1251_warning("cmd vbm len is %d B, truncating to %d",
144			       bitmap_len, PARTIAL_VBM_MAX);
145		bitmap_len = PARTIAL_VBM_MAX;
146	}
147	memcpy(vbm->tim.pvb_field, bitmap, bitmap_len);
148	vbm->tim.identity = identity;
149	vbm->tim.length = bitmap_len + 3;
150
151	vbm->len = cpu_to_le16(bitmap_len + 5);
152
153	ret = wl1251_cmd_send(wl, CMD_VBM, vbm, sizeof(*vbm));
154	if (ret < 0) {
155		wl1251_error("VBM command failed");
156		goto out;
157	}
158
159out:
160	kfree(vbm);
161	return ret;
162}
163
164int wl1251_cmd_data_path_rx(struct wl1251 *wl, u8 channel, bool enable)
165{
166	struct cmd_enabledisable_path *cmd;
167	int ret;
168	u16 cmd_rx;
169
170	wl1251_debug(DEBUG_CMD, "cmd data path");
171
172	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
173	if (!cmd)
174		return -ENOMEM;
175
176	cmd->channel = channel;
177
178	if (enable)
179		cmd_rx = CMD_ENABLE_RX;
180	else
181		cmd_rx = CMD_DISABLE_RX;
182
183	ret = wl1251_cmd_send(wl, cmd_rx, cmd, sizeof(*cmd));
184	if (ret < 0) {
185		wl1251_error("rx %s cmd for channel %d failed",
186			     enable ? "start" : "stop", channel);
187		goto out;
188	}
189
190	wl1251_debug(DEBUG_BOOT, "rx %s cmd channel %d",
191		     enable ? "start" : "stop", channel);
192
193out:
194	kfree(cmd);
195	return ret;
196}
197
198int wl1251_cmd_data_path_tx(struct wl1251 *wl, u8 channel, bool enable)
199{
200	struct cmd_enabledisable_path *cmd;
201	int ret;
202	u16 cmd_tx;
203
204	wl1251_debug(DEBUG_CMD, "cmd data path");
205
206	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
207	if (!cmd)
208		return -ENOMEM;
209
210	cmd->channel = channel;
211
212	if (enable)
213		cmd_tx = CMD_ENABLE_TX;
214	else
215		cmd_tx = CMD_DISABLE_TX;
216
217	ret = wl1251_cmd_send(wl, cmd_tx, cmd, sizeof(*cmd));
218	if (ret < 0)
219		wl1251_error("tx %s cmd for channel %d failed",
220			     enable ? "start" : "stop", channel);
221	else
222		wl1251_debug(DEBUG_BOOT, "tx %s cmd channel %d",
223			     enable ? "start" : "stop", channel);
224
225	kfree(cmd);
226	return ret;
227}
228
229int wl1251_cmd_join(struct wl1251 *wl, u8 bss_type, u8 channel,
230		    u16 beacon_interval, u8 dtim_interval)
231{
232	struct cmd_join *join;
233	int ret, i;
234	u8 *bssid;
235
236	join = kzalloc(sizeof(*join), GFP_KERNEL);
237	if (!join)
238		return -ENOMEM;
239
240	wl1251_debug(DEBUG_CMD, "cmd join%s ch %d %d/%d",
241		     bss_type == BSS_TYPE_IBSS ? " ibss" : "",
242		     channel, beacon_interval, dtim_interval);
243
244	/* Reverse order BSSID */
245	bssid = (u8 *) &join->bssid_lsb;
246	for (i = 0; i < ETH_ALEN; i++)
247		bssid[i] = wl->bssid[ETH_ALEN - i - 1];
248
249	join->rx_config_options = wl->rx_config;
250	join->rx_filter_options = wl->rx_filter;
251
252	join->basic_rate_set = RATE_MASK_1MBPS | RATE_MASK_2MBPS |
253		RATE_MASK_5_5MBPS | RATE_MASK_11MBPS;
254
255	join->beacon_interval = beacon_interval;
256	join->dtim_interval = dtim_interval;
257	join->bss_type = bss_type;
258	join->channel = channel;
259	join->ctrl = JOIN_CMD_CTRL_TX_FLUSH;
260
261	ret = wl1251_cmd_send(wl, CMD_START_JOIN, join, sizeof(*join));
262	if (ret < 0) {
263		wl1251_error("failed to initiate cmd join");
264		goto out;
265	}
266
267out:
268	kfree(join);
269	return ret;
270}
271
272int wl1251_cmd_ps_mode(struct wl1251 *wl, u8 ps_mode)
273{
274	struct wl1251_cmd_ps_params *ps_params = NULL;
275	int ret = 0;
276
277	wl1251_debug(DEBUG_CMD, "cmd set ps mode");
278
279	ps_params = kzalloc(sizeof(*ps_params), GFP_KERNEL);
280	if (!ps_params)
281		return -ENOMEM;
282
283	ps_params->ps_mode = ps_mode;
284	ps_params->send_null_data = 1;
285	ps_params->retries = 5;
286	ps_params->hang_over_period = 128;
287	ps_params->null_data_rate = 1; /* 1 Mbps */
288
289	ret = wl1251_cmd_send(wl, CMD_SET_PS_MODE, ps_params,
290			      sizeof(*ps_params));
291	if (ret < 0) {
292		wl1251_error("cmd set_ps_mode failed");
293		goto out;
294	}
295
296out:
297	kfree(ps_params);
298	return ret;
299}
300
301int wl1251_cmd_template_set(struct wl1251 *wl, u16 cmd_id,
302			    void *buf, size_t buf_len)
303{
304	struct wl1251_cmd_packet_template *cmd;
305	size_t cmd_len;
306	int ret = 0;
307
308	wl1251_debug(DEBUG_CMD, "cmd template %d", cmd_id);
309
310	WARN_ON(buf_len > WL1251_MAX_TEMPLATE_SIZE);
311	buf_len = min_t(size_t, buf_len, WL1251_MAX_TEMPLATE_SIZE);
312	cmd_len = ALIGN(sizeof(*cmd) + buf_len, 4);
313
314	cmd = kzalloc(cmd_len, GFP_KERNEL);
315	if (!cmd)
316		return -ENOMEM;
317
318	cmd->size = cpu_to_le16(buf_len);
319
320	if (buf)
321		memcpy(cmd->data, buf, buf_len);
322
323	ret = wl1251_cmd_send(wl, cmd_id, cmd, cmd_len);
324	if (ret < 0) {
325		wl1251_warning("cmd set_template failed: %d", ret);
326		goto out;
327	}
328
329out:
330	kfree(cmd);
331	return ret;
332}
333
334int wl1251_cmd_scan(struct wl1251 *wl, u8 *ssid, size_t ssid_len,
335		    struct ieee80211_channel *channels[],
336		    unsigned int n_channels, unsigned int n_probes)
337{
338	struct wl1251_cmd_scan *cmd;
339	int i, ret = 0;
340
341	wl1251_debug(DEBUG_CMD, "cmd scan channels %d", n_channels);
342
343	WARN_ON(n_channels > SCAN_MAX_NUM_OF_CHANNELS);
344
345	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
346	if (!cmd)
347		return -ENOMEM;
348
349	cmd->params.rx_config_options = cpu_to_le32(CFG_RX_ALL_GOOD);
350	cmd->params.rx_filter_options = cpu_to_le32(CFG_RX_PRSP_EN |
351						    CFG_RX_MGMT_EN |
352						    CFG_RX_BCN_EN);
353	cmd->params.scan_options = 0;
354	/*
355	 * Use high priority scan when not associated to prevent fw issue
356	 * causing never-ending scans (sometimes 20+ minutes).
357	 * Note: This bug may be caused by the fw's DTIM handling.
358	 */
359	if (is_zero_ether_addr(wl->bssid))
360		cmd->params.scan_options |= cpu_to_le16(WL1251_SCAN_OPT_PRIORITY_HIGH);
361	cmd->params.num_channels = n_channels;
362	cmd->params.num_probe_requests = n_probes;
363	cmd->params.tx_rate = cpu_to_le16(1 << 1); /* 2 Mbps */
364	cmd->params.tid_trigger = 0;
365
366	for (i = 0; i < n_channels; i++) {
367		cmd->channels[i].min_duration =
368			cpu_to_le32(WL1251_SCAN_MIN_DURATION);
369		cmd->channels[i].max_duration =
370			cpu_to_le32(WL1251_SCAN_MAX_DURATION);
371		memset(&cmd->channels[i].bssid_lsb, 0xff, 4);
372		memset(&cmd->channels[i].bssid_msb, 0xff, 2);
373		cmd->channels[i].early_termination = 0;
374		cmd->channels[i].tx_power_att = 0;
375		cmd->channels[i].channel = channels[i]->hw_value;
376	}
377
378	if (ssid) {
379		int len = clamp_val(ssid_len, 0, IEEE80211_MAX_SSID_LEN);
380
381		cmd->params.ssid_len = len;
382		memcpy(cmd->params.ssid, ssid, len);
383	}
384
385	ret = wl1251_cmd_send(wl, CMD_SCAN, cmd, sizeof(*cmd));
386	if (ret < 0) {
387		wl1251_error("cmd scan failed: %d", ret);
388		goto out;
389	}
390
391	wl1251_mem_read(wl, wl->cmd_box_addr, cmd, sizeof(*cmd));
392
393	if (cmd->header.status != CMD_STATUS_SUCCESS) {
394		wl1251_error("cmd scan status wasn't success: %d",
395			     cmd->header.status);
396		ret = -EIO;
397		goto out;
398	}
399
400out:
401	kfree(cmd);
402	return ret;
403}
404
405int wl1251_cmd_trigger_scan_to(struct wl1251 *wl, u32 timeout)
406{
407	struct wl1251_cmd_trigger_scan_to *cmd;
408	int ret;
409
410	wl1251_debug(DEBUG_CMD, "cmd trigger scan to");
411
412	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
413	if (!cmd)
414		return -ENOMEM;
415
416	cmd->timeout = timeout;
417
418	ret = wl1251_cmd_send(wl, CMD_TRIGGER_SCAN_TO, cmd, sizeof(*cmd));
419	if (ret < 0) {
420		wl1251_error("cmd trigger scan to failed: %d", ret);
421		goto out;
422	}
423
424out:
425	kfree(cmd);
426	return ret;
427}