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1/*
2 * Copyright (c) 2014 Redpine Signals Inc.
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
18#include <linux/firmware.h>
19#include <net/rsi_91x.h>
20#include "rsi_sdio.h"
21#include "rsi_common.h"
22
23/**
24 * rsi_sdio_master_access_msword() - This function sets the AHB master access
25 * MS word in the SDIO slave registers.
26 * @adapter: Pointer to the adapter structure.
27 * @ms_word: ms word need to be initialized.
28 *
29 * Return: status: 0 on success, -1 on failure.
30 */
31int rsi_sdio_master_access_msword(struct rsi_hw *adapter, u16 ms_word)
32{
33 u8 byte;
34 u8 function = 0;
35 int status = 0;
36
37 byte = (u8)(ms_word & 0x00FF);
38
39 rsi_dbg(INIT_ZONE,
40 "%s: MASTER_ACCESS_MSBYTE:0x%x\n", __func__, byte);
41
42 status = rsi_sdio_write_register(adapter,
43 function,
44 SDIO_MASTER_ACCESS_MSBYTE,
45 &byte);
46 if (status) {
47 rsi_dbg(ERR_ZONE,
48 "%s: fail to access MASTER_ACCESS_MSBYTE\n",
49 __func__);
50 return -1;
51 }
52
53 byte = (u8)(ms_word >> 8);
54
55 rsi_dbg(INIT_ZONE, "%s:MASTER_ACCESS_LSBYTE:0x%x\n", __func__, byte);
56 status = rsi_sdio_write_register(adapter,
57 function,
58 SDIO_MASTER_ACCESS_LSBYTE,
59 &byte);
60 return status;
61}
62
63static void rsi_rx_handler(struct rsi_hw *adapter);
64
65void rsi_sdio_rx_thread(struct rsi_common *common)
66{
67 struct rsi_hw *adapter = common->priv;
68 struct rsi_91x_sdiodev *sdev = adapter->rsi_dev;
69
70 do {
71 rsi_wait_event(&sdev->rx_thread.event, EVENT_WAIT_FOREVER);
72 rsi_reset_event(&sdev->rx_thread.event);
73 rsi_rx_handler(adapter);
74 } while (!atomic_read(&sdev->rx_thread.thread_done));
75
76 rsi_dbg(INFO_ZONE, "%s: Terminated SDIO RX thread\n", __func__);
77 atomic_inc(&sdev->rx_thread.thread_done);
78 kthread_complete_and_exit(&sdev->rx_thread.completion, 0);
79}
80
81/**
82 * rsi_process_pkt() - This Function reads rx_blocks register and figures out
83 * the size of the rx pkt.
84 * @common: Pointer to the driver private structure.
85 *
86 * Return: 0 on success, -1 on failure.
87 */
88static int rsi_process_pkt(struct rsi_common *common)
89{
90 struct rsi_hw *adapter = common->priv;
91 struct rsi_91x_sdiodev *dev = adapter->rsi_dev;
92 u8 num_blks = 0;
93 u32 rcv_pkt_len = 0;
94 int status = 0;
95 u8 value = 0;
96
97 num_blks = ((adapter->interrupt_status & 1) |
98 ((adapter->interrupt_status >> RECV_NUM_BLOCKS) << 1));
99
100 if (!num_blks) {
101 status = rsi_sdio_read_register(adapter,
102 SDIO_RX_NUM_BLOCKS_REG,
103 &value);
104 if (status) {
105 rsi_dbg(ERR_ZONE,
106 "%s: Failed to read pkt length from the card:\n",
107 __func__);
108 return status;
109 }
110 num_blks = value & 0x1f;
111 }
112
113 if (dev->write_fail == 2)
114 rsi_sdio_ack_intr(common->priv, (1 << MSDU_PKT_PENDING));
115
116 if (unlikely(!num_blks)) {
117 dev->write_fail = 2;
118 return -1;
119 }
120
121 rcv_pkt_len = (num_blks * 256);
122
123 status = rsi_sdio_host_intf_read_pkt(adapter, dev->pktbuffer,
124 rcv_pkt_len);
125 if (status) {
126 rsi_dbg(ERR_ZONE, "%s: Failed to read packet from card\n",
127 __func__);
128 return status;
129 }
130
131 status = rsi_read_pkt(common, dev->pktbuffer, rcv_pkt_len);
132 if (status) {
133 rsi_dbg(ERR_ZONE, "Failed to read the packet\n");
134 return status;
135 }
136
137 return 0;
138}
139
140/**
141 * rsi_init_sdio_slave_regs() - This function does the actual initialization
142 * of SDBUS slave registers.
143 * @adapter: Pointer to the adapter structure.
144 *
145 * Return: status: 0 on success, -1 on failure.
146 */
147int rsi_init_sdio_slave_regs(struct rsi_hw *adapter)
148{
149 struct rsi_91x_sdiodev *dev = adapter->rsi_dev;
150 u8 function = 0;
151 u8 byte;
152 int status = 0;
153
154 if (dev->next_read_delay) {
155 byte = dev->next_read_delay;
156 status = rsi_sdio_write_register(adapter,
157 function,
158 SDIO_NXT_RD_DELAY2,
159 &byte);
160 if (status) {
161 rsi_dbg(ERR_ZONE,
162 "%s: Failed to write SDIO_NXT_RD_DELAY2\n",
163 __func__);
164 return -1;
165 }
166 }
167
168 if (dev->sdio_high_speed_enable) {
169 rsi_dbg(INIT_ZONE, "%s: Enabling SDIO High speed\n", __func__);
170 byte = 0x3;
171
172 status = rsi_sdio_write_register(adapter,
173 function,
174 SDIO_REG_HIGH_SPEED,
175 &byte);
176 if (status) {
177 rsi_dbg(ERR_ZONE,
178 "%s: Failed to enable SDIO high speed\n",
179 __func__);
180 return -1;
181 }
182 }
183
184 /* This tells SDIO FIFO when to start read to host */
185 rsi_dbg(INIT_ZONE, "%s: Initializing SDIO read start level\n", __func__);
186 byte = 0x24;
187
188 status = rsi_sdio_write_register(adapter,
189 function,
190 SDIO_READ_START_LVL,
191 &byte);
192 if (status) {
193 rsi_dbg(ERR_ZONE,
194 "%s: Failed to write SDIO_READ_START_LVL\n", __func__);
195 return -1;
196 }
197
198 rsi_dbg(INIT_ZONE, "%s: Initializing FIFO ctrl registers\n", __func__);
199 byte = (128 - 32);
200
201 status = rsi_sdio_write_register(adapter,
202 function,
203 SDIO_READ_FIFO_CTL,
204 &byte);
205 if (status) {
206 rsi_dbg(ERR_ZONE,
207 "%s: Failed to write SDIO_READ_FIFO_CTL\n", __func__);
208 return -1;
209 }
210
211 byte = 32;
212 status = rsi_sdio_write_register(adapter,
213 function,
214 SDIO_WRITE_FIFO_CTL,
215 &byte);
216 if (status) {
217 rsi_dbg(ERR_ZONE,
218 "%s: Failed to write SDIO_WRITE_FIFO_CTL\n", __func__);
219 return -1;
220 }
221
222 return 0;
223}
224
225/**
226 * rsi_rx_handler() - Read and process SDIO interrupts.
227 * @adapter: Pointer to the adapter structure.
228 *
229 * Return: None.
230 */
231static void rsi_rx_handler(struct rsi_hw *adapter)
232{
233 struct rsi_common *common = adapter->priv;
234 struct rsi_91x_sdiodev *dev = adapter->rsi_dev;
235 int status;
236 u8 isr_status = 0;
237 u8 fw_status = 0;
238
239 dev->rx_info.sdio_int_counter++;
240
241 do {
242 mutex_lock(&common->rx_lock);
243 status = rsi_sdio_read_register(common->priv,
244 RSI_FN1_INT_REGISTER,
245 &isr_status);
246 if (status) {
247 rsi_dbg(ERR_ZONE,
248 "%s: Failed to Read Intr Status Register\n",
249 __func__);
250 mutex_unlock(&common->rx_lock);
251 return;
252 }
253 adapter->interrupt_status = isr_status;
254
255 if (isr_status == 0) {
256 rsi_set_event(&common->tx_thread.event);
257 dev->rx_info.sdio_intr_status_zero++;
258 mutex_unlock(&common->rx_lock);
259 return;
260 }
261
262 rsi_dbg(ISR_ZONE, "%s: Intr_status = %x %d %d\n",
263 __func__, isr_status, (1 << MSDU_PKT_PENDING),
264 (1 << FW_ASSERT_IND));
265
266 if (isr_status & BIT(PKT_BUFF_AVAILABLE)) {
267 status = rsi_sdio_check_buffer_status(adapter, 0);
268 if (status < 0)
269 rsi_dbg(ERR_ZONE,
270 "%s: Failed to check buffer status\n",
271 __func__);
272 rsi_sdio_ack_intr(common->priv,
273 BIT(PKT_BUFF_AVAILABLE));
274 rsi_set_event(&common->tx_thread.event);
275
276 rsi_dbg(ISR_ZONE, "%s: ==> BUFFER_AVAILABLE <==\n",
277 __func__);
278 dev->buff_status_updated = true;
279
280 isr_status &= ~BIT(PKT_BUFF_AVAILABLE);
281 }
282
283 if (isr_status & BIT(FW_ASSERT_IND)) {
284 rsi_dbg(ERR_ZONE, "%s: ==> FIRMWARE Assert <==\n",
285 __func__);
286 status = rsi_sdio_read_register(common->priv,
287 SDIO_FW_STATUS_REG,
288 &fw_status);
289 if (status) {
290 rsi_dbg(ERR_ZONE,
291 "%s: Failed to read f/w reg\n",
292 __func__);
293 } else {
294 rsi_dbg(ERR_ZONE,
295 "%s: Firmware Status is 0x%x\n",
296 __func__, fw_status);
297 rsi_sdio_ack_intr(common->priv,
298 BIT(FW_ASSERT_IND));
299 }
300
301 common->fsm_state = FSM_CARD_NOT_READY;
302
303 isr_status &= ~BIT(FW_ASSERT_IND);
304 }
305
306 if (isr_status & BIT(MSDU_PKT_PENDING)) {
307 rsi_dbg(ISR_ZONE, "Pkt pending interrupt\n");
308 dev->rx_info.total_sdio_msdu_pending_intr++;
309
310 status = rsi_process_pkt(common);
311 if (status) {
312 rsi_dbg(ERR_ZONE, "%s: Failed to read pkt\n",
313 __func__);
314 mutex_unlock(&common->rx_lock);
315 return;
316 }
317
318 isr_status &= ~BIT(MSDU_PKT_PENDING);
319 }
320
321 if (isr_status) {
322 rsi_sdio_ack_intr(common->priv, isr_status);
323 dev->rx_info.total_sdio_unknown_intr++;
324 isr_status = 0;
325 rsi_dbg(ISR_ZONE, "Unknown Interrupt %x\n",
326 isr_status);
327 }
328
329 mutex_unlock(&common->rx_lock);
330 } while (1);
331}
332
333/* This function is used to read buffer status register and
334 * set relevant fields in rsi_91x_sdiodev struct.
335 */
336int rsi_sdio_check_buffer_status(struct rsi_hw *adapter, u8 q_num)
337{
338 struct rsi_common *common = adapter->priv;
339 struct rsi_91x_sdiodev *dev = adapter->rsi_dev;
340 u8 buf_status = 0;
341 int status = 0;
342 static int counter = 4;
343
344 if (!dev->buff_status_updated && counter) {
345 counter--;
346 goto out;
347 }
348
349 dev->buff_status_updated = false;
350 status = rsi_sdio_read_register(common->priv,
351 RSI_DEVICE_BUFFER_STATUS_REGISTER,
352 &buf_status);
353
354 if (status) {
355 rsi_dbg(ERR_ZONE,
356 "%s: Failed to read status register\n", __func__);
357 return -1;
358 }
359
360 if (buf_status & (BIT(PKT_MGMT_BUFF_FULL))) {
361 if (!dev->rx_info.mgmt_buffer_full)
362 dev->rx_info.mgmt_buf_full_counter++;
363 dev->rx_info.mgmt_buffer_full = true;
364 } else {
365 dev->rx_info.mgmt_buffer_full = false;
366 }
367
368 if (buf_status & (BIT(PKT_BUFF_FULL))) {
369 if (!dev->rx_info.buffer_full)
370 dev->rx_info.buf_full_counter++;
371 dev->rx_info.buffer_full = true;
372 } else {
373 dev->rx_info.buffer_full = false;
374 }
375
376 if (buf_status & (BIT(PKT_BUFF_SEMI_FULL))) {
377 if (!dev->rx_info.semi_buffer_full)
378 dev->rx_info.buf_semi_full_counter++;
379 dev->rx_info.semi_buffer_full = true;
380 } else {
381 dev->rx_info.semi_buffer_full = false;
382 }
383
384 if (dev->rx_info.mgmt_buffer_full || dev->rx_info.buf_full_counter)
385 counter = 1;
386 else
387 counter = 4;
388
389out:
390 if ((q_num == MGMT_SOFT_Q) && (dev->rx_info.mgmt_buffer_full))
391 return QUEUE_FULL;
392
393 if ((q_num < MGMT_SOFT_Q) && (dev->rx_info.buffer_full))
394 return QUEUE_FULL;
395
396 return QUEUE_NOT_FULL;
397}
398
399/**
400 * rsi_sdio_determine_event_timeout() - This Function determines the event
401 * timeout duration.
402 * @adapter: Pointer to the adapter structure.
403 *
404 * Return: timeout duration is returned.
405 */
406int rsi_sdio_determine_event_timeout(struct rsi_hw *adapter)
407{
408 struct rsi_91x_sdiodev *dev = adapter->rsi_dev;
409
410 /* Once buffer full is seen, event timeout to occur every 2 msecs */
411 if (dev->rx_info.buffer_full)
412 return 2;
413
414 return EVENT_WAIT_FOREVER;
415}
1/**
2 * Copyright (c) 2014 Redpine Signals Inc.
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
18#include <linux/firmware.h>
19#include "rsi_sdio.h"
20#include "rsi_common.h"
21
22/**
23 * rsi_sdio_master_access_msword() - This function sets the AHB master access
24 * MS word in the SDIO slave registers.
25 * @adapter: Pointer to the adapter structure.
26 * @ms_word: ms word need to be initialized.
27 *
28 * Return: status: 0 on success, -1 on failure.
29 */
30static int rsi_sdio_master_access_msword(struct rsi_hw *adapter,
31 u16 ms_word)
32{
33 u8 byte;
34 u8 function = 0;
35 int status = 0;
36
37 byte = (u8)(ms_word & 0x00FF);
38
39 rsi_dbg(INIT_ZONE,
40 "%s: MASTER_ACCESS_MSBYTE:0x%x\n", __func__, byte);
41
42 status = rsi_sdio_write_register(adapter,
43 function,
44 SDIO_MASTER_ACCESS_MSBYTE,
45 &byte);
46 if (status) {
47 rsi_dbg(ERR_ZONE,
48 "%s: fail to access MASTER_ACCESS_MSBYTE\n",
49 __func__);
50 return -1;
51 }
52
53 byte = (u8)(ms_word >> 8);
54
55 rsi_dbg(INIT_ZONE, "%s:MASTER_ACCESS_LSBYTE:0x%x\n", __func__, byte);
56 status = rsi_sdio_write_register(adapter,
57 function,
58 SDIO_MASTER_ACCESS_LSBYTE,
59 &byte);
60 return status;
61}
62
63/**
64 * rsi_copy_to_card() - This function includes the actual funtionality of
65 * copying the TA firmware to the card.Basically this
66 * function includes opening the TA file,reading the
67 * TA file and writing their values in blocks of data.
68 * @common: Pointer to the driver private structure.
69 * @fw: Pointer to the firmware value to be written.
70 * @len: length of firmware file.
71 * @num_blocks: Number of blocks to be written to the card.
72 *
73 * Return: 0 on success and -1 on failure.
74 */
75static int rsi_copy_to_card(struct rsi_common *common,
76 const u8 *fw,
77 u32 len,
78 u32 num_blocks)
79{
80 struct rsi_hw *adapter = common->priv;
81 struct rsi_91x_sdiodev *dev =
82 (struct rsi_91x_sdiodev *)adapter->rsi_dev;
83 u32 indx, ii;
84 u32 block_size = dev->tx_blk_size;
85 u32 lsb_address;
86 __le32 data[] = { TA_HOLD_THREAD_VALUE, TA_SOFT_RST_CLR,
87 TA_PC_ZERO, TA_RELEASE_THREAD_VALUE };
88 u32 address[] = { TA_HOLD_THREAD_REG, TA_SOFT_RESET_REG,
89 TA_TH0_PC_REG, TA_RELEASE_THREAD_REG };
90 u32 base_address;
91 u16 msb_address;
92
93 base_address = TA_LOAD_ADDRESS;
94 msb_address = base_address >> 16;
95
96 for (indx = 0, ii = 0; ii < num_blocks; ii++, indx += block_size) {
97 lsb_address = ((u16) base_address | RSI_SD_REQUEST_MASTER);
98 if (rsi_sdio_write_register_multiple(adapter,
99 lsb_address,
100 (u8 *)(fw + indx),
101 block_size)) {
102 rsi_dbg(ERR_ZONE,
103 "%s: Unable to load %s blk\n", __func__,
104 FIRMWARE_RSI9113);
105 return -1;
106 }
107 rsi_dbg(INIT_ZONE, "%s: loading block: %d\n", __func__, ii);
108 base_address += block_size;
109 if ((base_address >> 16) != msb_address) {
110 msb_address += 1;
111 if (rsi_sdio_master_access_msword(adapter,
112 msb_address)) {
113 rsi_dbg(ERR_ZONE,
114 "%s: Unable to set ms word reg\n",
115 __func__);
116 return -1;
117 }
118 }
119 }
120
121 if (len % block_size) {
122 lsb_address = ((u16) base_address | RSI_SD_REQUEST_MASTER);
123 if (rsi_sdio_write_register_multiple(adapter,
124 lsb_address,
125 (u8 *)(fw + indx),
126 len % block_size)) {
127 rsi_dbg(ERR_ZONE,
128 "%s: Unable to load f/w\n", __func__);
129 return -1;
130 }
131 }
132 rsi_dbg(INIT_ZONE,
133 "%s: Succesfully loaded TA instructions\n", __func__);
134
135 if (rsi_sdio_master_access_msword(adapter, TA_BASE_ADDR)) {
136 rsi_dbg(ERR_ZONE,
137 "%s: Unable to set ms word to common reg\n",
138 __func__);
139 return -1;
140 }
141
142 for (ii = 0; ii < ARRAY_SIZE(data); ii++) {
143 /* Bringing TA out of reset */
144 if (rsi_sdio_write_register_multiple(adapter,
145 (address[ii] |
146 RSI_SD_REQUEST_MASTER),
147 (u8 *)&data[ii],
148 4)) {
149 rsi_dbg(ERR_ZONE,
150 "%s: Unable to hold TA threads\n", __func__);
151 return -1;
152 }
153 }
154
155 rsi_dbg(INIT_ZONE, "%s: loaded firmware\n", __func__);
156 return 0;
157}
158
159/**
160 * rsi_load_ta_instructions() - This function includes the actual funtionality
161 * of loading the TA firmware.This function also
162 * includes opening the TA file,reading the TA
163 * file and writing their value in blocks of data.
164 * @common: Pointer to the driver private structure.
165 *
166 * Return: status: 0 on success, -1 on failure.
167 */
168static int rsi_load_ta_instructions(struct rsi_common *common)
169{
170 struct rsi_hw *adapter = common->priv;
171 struct rsi_91x_sdiodev *dev =
172 (struct rsi_91x_sdiodev *)adapter->rsi_dev;
173 u32 len;
174 u32 num_blocks;
175 const u8 *fw;
176 const struct firmware *fw_entry = NULL;
177 u32 block_size = dev->tx_blk_size;
178 int status = 0;
179 u32 base_address;
180 u16 msb_address;
181
182 if (rsi_sdio_master_access_msword(adapter, TA_BASE_ADDR)) {
183 rsi_dbg(ERR_ZONE,
184 "%s: Unable to set ms word to common reg\n",
185 __func__);
186 return -1;
187 }
188 base_address = TA_LOAD_ADDRESS;
189 msb_address = (base_address >> 16);
190
191 if (rsi_sdio_master_access_msword(adapter, msb_address)) {
192 rsi_dbg(ERR_ZONE,
193 "%s: Unable to set ms word reg\n", __func__);
194 return -1;
195 }
196
197 status = request_firmware(&fw_entry, FIRMWARE_RSI9113, adapter->device);
198 if (status < 0) {
199 rsi_dbg(ERR_ZONE, "%s Firmware file %s not found\n",
200 __func__, FIRMWARE_RSI9113);
201 return status;
202 }
203
204 /* Copy firmware into DMA-accessible memory */
205 fw = kmemdup(fw_entry->data, fw_entry->size, GFP_KERNEL);
206 if (!fw) {
207 status = -ENOMEM;
208 goto out;
209 }
210 len = fw_entry->size;
211
212 if (len % 4)
213 len += (4 - (len % 4));
214
215 num_blocks = (len / block_size);
216
217 rsi_dbg(INIT_ZONE, "%s: Instruction size:%d\n", __func__, len);
218 rsi_dbg(INIT_ZONE, "%s: num blocks: %d\n", __func__, num_blocks);
219
220 status = rsi_copy_to_card(common, fw, len, num_blocks);
221 kfree(fw);
222
223out:
224 release_firmware(fw_entry);
225 return status;
226}
227
228/**
229 * rsi_process_pkt() - This Function reads rx_blocks register and figures out
230 * the size of the rx pkt.
231 * @common: Pointer to the driver private structure.
232 *
233 * Return: 0 on success, -1 on failure.
234 */
235static int rsi_process_pkt(struct rsi_common *common)
236{
237 struct rsi_hw *adapter = common->priv;
238 u8 num_blks = 0;
239 u32 rcv_pkt_len = 0;
240 int status = 0;
241
242 status = rsi_sdio_read_register(adapter,
243 SDIO_RX_NUM_BLOCKS_REG,
244 &num_blks);
245
246 if (status) {
247 rsi_dbg(ERR_ZONE,
248 "%s: Failed to read pkt length from the card:\n",
249 __func__);
250 return status;
251 }
252 rcv_pkt_len = (num_blks * 256);
253
254 common->rx_data_pkt = kmalloc(rcv_pkt_len, GFP_KERNEL);
255 if (!common->rx_data_pkt) {
256 rsi_dbg(ERR_ZONE, "%s: Failed in memory allocation\n",
257 __func__);
258 return -ENOMEM;
259 }
260
261 status = rsi_sdio_host_intf_read_pkt(adapter,
262 common->rx_data_pkt,
263 rcv_pkt_len);
264 if (status) {
265 rsi_dbg(ERR_ZONE, "%s: Failed to read packet from card\n",
266 __func__);
267 goto fail;
268 }
269
270 status = rsi_read_pkt(common, rcv_pkt_len);
271
272fail:
273 kfree(common->rx_data_pkt);
274 return status;
275}
276
277/**
278 * rsi_init_sdio_slave_regs() - This function does the actual initialization
279 * of SDBUS slave registers.
280 * @adapter: Pointer to the adapter structure.
281 *
282 * Return: status: 0 on success, -1 on failure.
283 */
284int rsi_init_sdio_slave_regs(struct rsi_hw *adapter)
285{
286 struct rsi_91x_sdiodev *dev =
287 (struct rsi_91x_sdiodev *)adapter->rsi_dev;
288 u8 function = 0;
289 u8 byte;
290 int status = 0;
291
292 if (dev->next_read_delay) {
293 byte = dev->next_read_delay;
294 status = rsi_sdio_write_register(adapter,
295 function,
296 SDIO_NXT_RD_DELAY2,
297 &byte);
298 if (status) {
299 rsi_dbg(ERR_ZONE,
300 "%s: Failed to write SDIO_NXT_RD_DELAY2\n",
301 __func__);
302 return -1;
303 }
304 }
305
306 if (dev->sdio_high_speed_enable) {
307 rsi_dbg(INIT_ZONE, "%s: Enabling SDIO High speed\n", __func__);
308 byte = 0x3;
309
310 status = rsi_sdio_write_register(adapter,
311 function,
312 SDIO_REG_HIGH_SPEED,
313 &byte);
314 if (status) {
315 rsi_dbg(ERR_ZONE,
316 "%s: Failed to enable SDIO high speed\n",
317 __func__);
318 return -1;
319 }
320 }
321
322 /* This tells SDIO FIFO when to start read to host */
323 rsi_dbg(INIT_ZONE, "%s: Initialzing SDIO read start level\n", __func__);
324 byte = 0x24;
325
326 status = rsi_sdio_write_register(adapter,
327 function,
328 SDIO_READ_START_LVL,
329 &byte);
330 if (status) {
331 rsi_dbg(ERR_ZONE,
332 "%s: Failed to write SDIO_READ_START_LVL\n", __func__);
333 return -1;
334 }
335
336 rsi_dbg(INIT_ZONE, "%s: Initialzing FIFO ctrl registers\n", __func__);
337 byte = (128 - 32);
338
339 status = rsi_sdio_write_register(adapter,
340 function,
341 SDIO_READ_FIFO_CTL,
342 &byte);
343 if (status) {
344 rsi_dbg(ERR_ZONE,
345 "%s: Failed to write SDIO_READ_FIFO_CTL\n", __func__);
346 return -1;
347 }
348
349 byte = 32;
350 status = rsi_sdio_write_register(adapter,
351 function,
352 SDIO_WRITE_FIFO_CTL,
353 &byte);
354 if (status) {
355 rsi_dbg(ERR_ZONE,
356 "%s: Failed to write SDIO_WRITE_FIFO_CTL\n", __func__);
357 return -1;
358 }
359
360 return 0;
361}
362
363/**
364 * rsi_interrupt_handler() - This function read and process SDIO interrupts.
365 * @adapter: Pointer to the adapter structure.
366 *
367 * Return: None.
368 */
369void rsi_interrupt_handler(struct rsi_hw *adapter)
370{
371 struct rsi_common *common = adapter->priv;
372 struct rsi_91x_sdiodev *dev =
373 (struct rsi_91x_sdiodev *)adapter->rsi_dev;
374 int status;
375 enum sdio_interrupt_type isr_type;
376 u8 isr_status = 0;
377 u8 fw_status = 0;
378
379 dev->rx_info.sdio_int_counter++;
380
381 do {
382 mutex_lock(&common->tx_rxlock);
383 status = rsi_sdio_read_register(common->priv,
384 RSI_FN1_INT_REGISTER,
385 &isr_status);
386 if (status) {
387 rsi_dbg(ERR_ZONE,
388 "%s: Failed to Read Intr Status Register\n",
389 __func__);
390 mutex_unlock(&common->tx_rxlock);
391 return;
392 }
393
394 if (isr_status == 0) {
395 rsi_set_event(&common->tx_thread.event);
396 dev->rx_info.sdio_intr_status_zero++;
397 mutex_unlock(&common->tx_rxlock);
398 return;
399 }
400
401 rsi_dbg(ISR_ZONE, "%s: Intr_status = %x %d %d\n",
402 __func__, isr_status, (1 << MSDU_PKT_PENDING),
403 (1 << FW_ASSERT_IND));
404
405 do {
406 RSI_GET_SDIO_INTERRUPT_TYPE(isr_status, isr_type);
407
408 switch (isr_type) {
409 case BUFFER_AVAILABLE:
410 dev->rx_info.watch_bufferfull_count = 0;
411 dev->rx_info.buffer_full = false;
412 dev->rx_info.semi_buffer_full = false;
413 dev->rx_info.mgmt_buffer_full = false;
414 rsi_sdio_ack_intr(common->priv,
415 (1 << PKT_BUFF_AVAILABLE));
416 rsi_set_event(&common->tx_thread.event);
417
418 rsi_dbg(ISR_ZONE,
419 "%s: ==> BUFFER_AVAILABLE <==\n",
420 __func__);
421 dev->rx_info.buf_available_counter++;
422 break;
423
424 case FIRMWARE_ASSERT_IND:
425 rsi_dbg(ERR_ZONE,
426 "%s: ==> FIRMWARE Assert <==\n",
427 __func__);
428 status = rsi_sdio_read_register(common->priv,
429 SDIO_FW_STATUS_REG,
430 &fw_status);
431 if (status) {
432 rsi_dbg(ERR_ZONE,
433 "%s: Failed to read f/w reg\n",
434 __func__);
435 } else {
436 rsi_dbg(ERR_ZONE,
437 "%s: Firmware Status is 0x%x\n",
438 __func__ , fw_status);
439 rsi_sdio_ack_intr(common->priv,
440 (1 << FW_ASSERT_IND));
441 }
442
443 common->fsm_state = FSM_CARD_NOT_READY;
444 break;
445
446 case MSDU_PACKET_PENDING:
447 rsi_dbg(ISR_ZONE, "Pkt pending interrupt\n");
448 dev->rx_info.total_sdio_msdu_pending_intr++;
449
450 status = rsi_process_pkt(common);
451 if (status) {
452 rsi_dbg(ERR_ZONE,
453 "%s: Failed to read pkt\n",
454 __func__);
455 mutex_unlock(&common->tx_rxlock);
456 return;
457 }
458 break;
459 default:
460 rsi_sdio_ack_intr(common->priv, isr_status);
461 dev->rx_info.total_sdio_unknown_intr++;
462 isr_status = 0;
463 rsi_dbg(ISR_ZONE,
464 "Unknown Interrupt %x\n",
465 isr_status);
466 break;
467 }
468 isr_status ^= BIT(isr_type - 1);
469 } while (isr_status);
470 mutex_unlock(&common->tx_rxlock);
471 } while (1);
472}
473
474/**
475 * rsi_device_init() - This Function Initializes The HAL.
476 * @common: Pointer to the driver private structure.
477 *
478 * Return: 0 on success, -1 on failure.
479 */
480int rsi_sdio_device_init(struct rsi_common *common)
481{
482 if (rsi_load_ta_instructions(common))
483 return -1;
484
485 if (rsi_sdio_master_access_msword(common->priv, MISC_CFG_BASE_ADDR)) {
486 rsi_dbg(ERR_ZONE, "%s: Unable to set ms word reg\n",
487 __func__);
488 return -1;
489 }
490 rsi_dbg(INIT_ZONE,
491 "%s: Setting ms word to 0x41050000\n", __func__);
492
493 return 0;
494}
495
496/**
497 * rsi_sdio_read_buffer_status_register() - This function is used to the read
498 * buffer status register and set
499 * relevant fields in
500 * rsi_91x_sdiodev struct.
501 * @adapter: Pointer to the driver hw structure.
502 * @q_num: The Q number whose status is to be found.
503 *
504 * Return: status: -1 on failure or else queue full/stop is indicated.
505 */
506int rsi_sdio_read_buffer_status_register(struct rsi_hw *adapter, u8 q_num)
507{
508 struct rsi_common *common = adapter->priv;
509 struct rsi_91x_sdiodev *dev =
510 (struct rsi_91x_sdiodev *)adapter->rsi_dev;
511 u8 buf_status = 0;
512 int status = 0;
513
514 status = rsi_sdio_read_register(common->priv,
515 RSI_DEVICE_BUFFER_STATUS_REGISTER,
516 &buf_status);
517
518 if (status) {
519 rsi_dbg(ERR_ZONE,
520 "%s: Failed to read status register\n", __func__);
521 return -1;
522 }
523
524 if (buf_status & (BIT(PKT_MGMT_BUFF_FULL))) {
525 if (!dev->rx_info.mgmt_buffer_full)
526 dev->rx_info.mgmt_buf_full_counter++;
527 dev->rx_info.mgmt_buffer_full = true;
528 } else {
529 dev->rx_info.mgmt_buffer_full = false;
530 }
531
532 if (buf_status & (BIT(PKT_BUFF_FULL))) {
533 if (!dev->rx_info.buffer_full)
534 dev->rx_info.buf_full_counter++;
535 dev->rx_info.buffer_full = true;
536 } else {
537 dev->rx_info.buffer_full = false;
538 }
539
540 if (buf_status & (BIT(PKT_BUFF_SEMI_FULL))) {
541 if (!dev->rx_info.semi_buffer_full)
542 dev->rx_info.buf_semi_full_counter++;
543 dev->rx_info.semi_buffer_full = true;
544 } else {
545 dev->rx_info.semi_buffer_full = false;
546 }
547
548 if ((q_num == MGMT_SOFT_Q) && (dev->rx_info.mgmt_buffer_full))
549 return QUEUE_FULL;
550
551 if (dev->rx_info.buffer_full)
552 return QUEUE_FULL;
553
554 return QUEUE_NOT_FULL;
555}
556
557/**
558 * rsi_sdio_determine_event_timeout() - This Function determines the event
559 * timeout duration.
560 * @adapter: Pointer to the adapter structure.
561 *
562 * Return: timeout duration is returned.
563 */
564int rsi_sdio_determine_event_timeout(struct rsi_hw *adapter)
565{
566 struct rsi_91x_sdiodev *dev =
567 (struct rsi_91x_sdiodev *)adapter->rsi_dev;
568
569 /* Once buffer full is seen, event timeout to occur every 2 msecs */
570 if (dev->rx_info.buffer_full)
571 return 2;
572
573 return EVENT_WAIT_FOREVER;
574}