aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/net/wireless/iwmc3200wifi/fw.c
blob: c58f614ce6d84dc1ef1dabfeae7a93d5d5d656a0 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
/*
 * Intel Wireless Multicomm 3200 WiFi driver
 *
 * Copyright (C) 2009 Intel Corporation. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   * Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *   * Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in
 *     the documentation and/or other materials provided with the
 *     distribution.
 *   * Neither the name of Intel Corporation nor the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 *
 * Intel Corporation <ilw@linux.intel.com>
 * Samuel Ortiz <samuel.ortiz@intel.com>
 * Zhu Yi <yi.zhu@intel.com>
 *
 */

#include <linux/kernel.h>
#include <linux/firmware.h>

#include "iwm.h"
#include "bus.h"
#include "hal.h"
#include "umac.h"
#include "debug.h"
#include "fw.h"
#include "commands.h"

static const char fw_barker[] = "*WESTOPFORNOONE*";

/*
 * @op_code: Op code we're looking for.
 * @index: There can be several instances of the same opcode within
 *         the firmware. Index specifies which one we're looking for.
 */
static int iwm_fw_op_offset(struct iwm_priv *iwm, const struct firmware *fw,
			    u16 op_code, u32 index)
{
	int offset = -EINVAL, fw_offset;
	u32 op_index = 0;
	const u8 *fw_ptr;
	struct iwm_fw_hdr_rec *rec;

	fw_offset = 0;
	fw_ptr = fw->data;

	/* We first need to look for the firmware barker */
	if (memcmp(fw_ptr, fw_barker, IWM_HDR_BARKER_LEN)) {
		IWM_ERR(iwm, "No barker string in this FW\n");
		return -EINVAL;
	}

	if (fw->size < IWM_HDR_LEN) {
		IWM_ERR(iwm, "FW is too small (%zu)\n", fw->size);
		return -EINVAL;
	}

	fw_offset += IWM_HDR_BARKER_LEN;

	while (fw_offset < fw->size) {
		rec = (struct iwm_fw_hdr_rec *)(fw_ptr + fw_offset);

		IWM_DBG_FW(iwm, DBG, "FW: op_code: 0x%x, len: %d @ 0x%x\n",
			   rec->op_code, rec->len, fw_offset);

		if (rec->op_code == IWM_HDR_REC_OP_INVALID) {
			IWM_DBG_FW(iwm, DBG, "Reached INVALID op code\n");
			break;
		}

		if (rec->op_code == op_code) {
			if (op_index == index) {
				fw_offset += sizeof(struct iwm_fw_hdr_rec);
				offset = fw_offset;
				goto out;
			}
			op_index++;
		}

		fw_offset += sizeof(struct iwm_fw_hdr_rec) + rec->len;
	}

 out:
	return offset;
}

static int iwm_load_firmware_chunk(struct iwm_priv *iwm,
				   const struct firmware *fw,
				   struct iwm_fw_img_desc *img_desc)
{
	struct iwm_udma_nonwifi_cmd target_cmd;
	u32 chunk_size;
	const u8 *chunk_ptr;
	int ret = 0;

	IWM_DBG_FW(iwm, INFO, "Loading FW chunk: %d bytes @ 0x%x\n",
		   img_desc->length, img_desc->address);

	target_cmd.opcode = UMAC_HDI_OUT_OPCODE_WRITE;
	target_cmd.handle_by_hw = 1;
	target_cmd.op2 = 0;
	target_cmd.resp = 0;
	target_cmd.eop = 1;

	chunk_size = img_desc->length;
	chunk_ptr = fw->data + img_desc->offset;

	while (chunk_size > 0) {
		u32 tmp_chunk_size;

		tmp_chunk_size = min_t(u32, chunk_size,
				       IWM_MAX_NONWIFI_CMD_BUFF_SIZE);

		target_cmd.addr = cpu_to_le32(img_desc->address +
				    (chunk_ptr - fw->data - img_desc->offset));
		target_cmd.op1_sz = cpu_to_le32(tmp_chunk_size);

		IWM_DBG_FW(iwm, DBG, "\t%d bytes @ 0x%x\n",
			   tmp_chunk_size, target_cmd.addr);

		ret = iwm_hal_send_target_cmd(iwm, &target_cmd, chunk_ptr);
		if (ret < 0) {
			IWM_ERR(iwm, "Couldn't load FW chunk\n");
			break;
		}

		chunk_size -= tmp_chunk_size;
		chunk_ptr += tmp_chunk_size;
	}

	return ret;
}
/*
 * To load a fw image to the target, we basically go through the
 * fw, looking for OP_MEM_DESC records. Once we found one, we
 * pass it to iwm_load_firmware_chunk().
 * The OP_MEM_DESC records contain the actuall memory chunk to be
 * sent, but also the destination address.
 */
static int iwm_load_img(struct iwm_priv *iwm, const char *img_name)
{
	const struct firmware *fw;
	struct iwm_fw_img_desc *img_desc;
	struct iwm_fw_img_ver *ver;
	int ret = 0, fw_offset;
	u32 opcode_idx = 0, build_date;
	char *build_tag;

	ret = request_firmware(&fw, img_name, iwm_to_dev(iwm));
	if (ret) {
		IWM_ERR(iwm, "Request firmware failed");
		return ret;
	}

	IWM_DBG_FW(iwm, INFO, "Start to load FW %s\n", img_name);

	while (1) {
		fw_offset = iwm_fw_op_offset(iwm, fw,
					     IWM_HDR_REC_OP_MEM_DESC,
					     opcode_idx);
		if (fw_offset < 0)
			break;

		img_desc = (struct iwm_fw_img_desc *)(fw->data + fw_offset);
		ret = iwm_load_firmware_chunk(iwm, fw, img_desc);
		if (ret < 0)
			goto err_release_fw;
		opcode_idx++;
	};

	/* Read firmware version */
	fw_offset = iwm_fw_op_offset(iwm, fw, IWM_HDR_REC_OP_SW_VER, 0);
	if (fw_offset < 0)
		goto err_release_fw;

	ver = (struct iwm_fw_img_ver *)(fw->data + fw_offset);

	/* Read build tag */
	fw_offset = iwm_fw_op_offset(iwm, fw, IWM_HDR_REC_OP_BUILD_TAG, 0);
	if (fw_offset < 0)
		goto err_release_fw;

	build_tag = (char *)(fw->data + fw_offset);

	/* Read build date */
	fw_offset = iwm_fw_op_offset(iwm, fw, IWM_HDR_REC_OP_BUILD_DATE, 0);
	if (fw_offset < 0)
		goto err_release_fw;

	build_date = *(u32 *)(fw->data + fw_offset);

	IWM_INFO(iwm, "%s:\n", img_name);
	IWM_INFO(iwm, "\tVersion:    %02X.%02X\n", ver->major, ver->minor);
	IWM_INFO(iwm, "\tBuild tag:  %s\n", build_tag);
	IWM_INFO(iwm, "\tBuild date: %x-%x-%x\n",
		 IWM_BUILD_YEAR(build_date), IWM_BUILD_MONTH(build_date),
		 IWM_BUILD_DAY(build_date));


 err_release_fw:
	release_firmware(fw);

	return ret;
}

static int iwm_load_umac(struct iwm_priv *iwm)
{
	struct iwm_udma_nonwifi_cmd target_cmd;
	int ret;

	ret = iwm_load_img(iwm, iwm->bus_ops->umac_name);
	if (ret < 0)
		return ret;

	/* We've loaded the UMAC, we can tell the target to jump there */
	target_cmd.opcode = UMAC_HDI_OUT_OPCODE_JUMP;
	target_cmd.addr = cpu_to_le32(UMAC_MU_FW_INST_DATA_12_ADDR);
	target_cmd.op1_sz = 0;
	target_cmd.op2 = 0;
	target_cmd.handle_by_hw = 0;
	target_cmd.resp = 1 ;
	target_cmd.eop = 1;

	ret = iwm_hal_send_target_cmd(iwm, &target_cmd, NULL);
	if (ret < 0)
		IWM_ERR(iwm, "Couldn't send JMP command\n");

	return ret;
}

static int iwm_load_lmac(struct iwm_priv *iwm, const char *img_name)
{
	int ret;

	ret = iwm_load_img(iwm, img_name);
	if (ret < 0)
		return ret;

	return iwm_send_umac_reset(iwm,
			cpu_to_le32(UMAC_RST_CTRL_FLG_LARC_CLK_EN), 0);
}

/*
 * We currently have to load 3 FWs:
 * 1) The UMAC (Upper MAC).
 * 2) The calibration LMAC (Lower MAC).
 *    We then send the calibration init command, so that the device can
 *    run a first calibration round.
 * 3) The operational LMAC, which replaces the calibration one when it's
 *    done with the first calibration round.
 *
 * Once those 3 FWs have been loaded, we send the periodic calibration
 * command, and then the device is available for regular 802.11 operations.
 */
int iwm_load_fw(struct iwm_priv *iwm)
{
	unsigned long init_calib_map, periodic_calib_map;
	int ret;

	/* We first start downloading the UMAC */
	ret = iwm_load_umac(iwm);
	if (ret < 0) {
		IWM_ERR(iwm, "UMAC loading failed\n");
		return ret;
	}

	/* Handle UMAC_ALIVE notification */
	ret = iwm_notif_handle(iwm, UMAC_NOTIFY_OPCODE_ALIVE, IWM_SRC_UMAC,
			       WAIT_NOTIF_TIMEOUT);
	if (ret) {
		IWM_ERR(iwm, "Handle UMAC_ALIVE failed: %d\n", ret);
		return ret;
	}

	/* UMAC is alive, we can download the calibration LMAC */
	ret = iwm_load_lmac(iwm, iwm->bus_ops->calib_lmac_name);
	if (ret) {
		IWM_ERR(iwm, "Calibration LMAC loading failed\n");
		return ret;
	}

	/* Handle UMAC_INIT_COMPLETE notification */
	ret = iwm_notif_handle(iwm, UMAC_NOTIFY_OPCODE_INIT_COMPLETE,
			       IWM_SRC_UMAC, WAIT_NOTIF_TIMEOUT);
	if (ret) {
		IWM_ERR(iwm, "Handle INIT_COMPLETE failed for calibration "
			"LMAC: %d\n", ret);
		return ret;
	}

	/* Read EEPROM data */
	ret = iwm_eeprom_init(iwm);
	if (ret < 0) {
		IWM_ERR(iwm, "Couldn't init eeprom array\n");
		return ret;
	}

	init_calib_map = iwm->conf.calib_map & IWM_CALIB_MAP_INIT_MSK;
	periodic_calib_map = IWM_CALIB_MAP_PER_LMAC(iwm->conf.calib_map);

#ifdef CONFIG_IWM_B0_HW_SUPPORT
	if (iwm->conf.hw_b0) {
		clear_bit(PHY_CALIBRATE_RX_IQ_CMD, &init_calib_map);
		clear_bit(PHY_CALIBRATE_RX_IQ_CMD, &periodic_calib_map);
	}
#endif
	/* Read RX IQ calibration result from EEPROM */
	if (test_bit(PHY_CALIBRATE_RX_IQ_CMD, &init_calib_map)) {
		iwm_store_rxiq_calib_result(iwm);
		set_bit(PHY_CALIBRATE_RX_IQ_CMD, &iwm->calib_done_map);
	}

	iwm_send_prio_table(iwm);
	iwm_send_init_calib_cfg(iwm, init_calib_map);

	while (iwm->calib_done_map != init_calib_map) {
		ret = iwm_notif_handle(iwm, CALIBRATION_RES_NOTIFICATION,
				       IWM_SRC_LMAC, WAIT_NOTIF_TIMEOUT);
		if (ret) {
			IWM_ERR(iwm, "Wait for calibration result timeout\n");
			goto out;
		}
		IWM_DBG_FW(iwm, DBG, "Got calibration result. calib_done_map: "
			   "0x%lx, requested calibrations: 0x%lx\n",
			   iwm->calib_done_map, init_calib_map);
	}

	/* Handle LMAC CALIBRATION_COMPLETE notification */
	ret = iwm_notif_handle(iwm, CALIBRATION_COMPLETE_NOTIFICATION,
			       IWM_SRC_LMAC, WAIT_NOTIF_TIMEOUT);
	if (ret) {
		IWM_ERR(iwm, "Wait for CALIBRATION_COMPLETE timeout\n");
		goto out;
	}

	IWM_INFO(iwm, "LMAC calibration done: 0x%lx\n", iwm->calib_done_map);

	iwm_send_umac_reset(iwm, cpu_to_le32(UMAC_RST_CTRL_FLG_LARC_RESET), 1);

	ret = iwm_notif_handle(iwm, UMAC_CMD_OPCODE_RESET, IWM_SRC_UMAC,
			       WAIT_NOTIF_TIMEOUT);
	if (ret) {
		IWM_ERR(iwm, "Wait for UMAC RESET timeout\n");
		goto out;
	}

	/* Download the operational LMAC */
	ret = iwm_load_lmac(iwm, iwm->bus_ops->lmac_name);
	if (ret) {
		IWM_ERR(iwm, "LMAC loading failed\n");
		goto out;
	}

	ret = iwm_notif_handle(iwm, UMAC_NOTIFY_OPCODE_INIT_COMPLETE,
			       IWM_SRC_UMAC, WAIT_NOTIF_TIMEOUT);
	if (ret) {
		IWM_ERR(iwm, "Handle INIT_COMPLETE failed for LMAC: %d\n", ret);
		goto out;
	}

	iwm_send_prio_table(iwm);
	iwm_send_calib_results(iwm);
	iwm_send_periodic_calib_cfg(iwm, periodic_calib_map);

	return 0;

 out:
	iwm_eeprom_exit(iwm);
	return ret;
}