1 #include <linux/module.h>
2 #include <linux/init.h>
3 #include <linux/kernel.h>
5 #include <linux/slab.h>
6 #include <linux/types.h>
7 #include <linux/cdev.h>
8 #include <asm/uaccess.h>
9 #include <linux/device.h>
10 #include <linux/spi/spi.h>
12 #include "linux_wlan_common.h"
14 #define USE_SPI_DMA 0 /* johnny add */
17 #if defined(PLAT_PANDA_ES_OMAP4460)
18 #define MIN_SPEED 12000000
19 #define MAX_SPEED 24000000
20 #elif defined(PLAT_WMS8304)
21 #define MIN_SPEED 12000000
22 #define MAX_SPEED 24000000 /* 4000000 */
23 #elif defined(CUSTOMER_PLATFORM)
25 TODO : define Clock speed under 48M.
28 * #define MIN_SPEED 24000000
29 * #define MAX_SPEED 48000000
32 #define MIN_SPEED 24000000
33 #define MAX_SPEED 48000000
35 #else /* WILC_ASIC_A0 */
36 /* Limit clk to 6MHz on FPGA. */
37 #define MIN_SPEED 6000000
38 #define MAX_SPEED 6000000
39 #endif /* WILC_ASIC_A0 */
41 static uint32_t SPEED = MIN_SPEED;
43 struct spi_device *wilc_spi_dev;
44 void linux_spi_deinit(void *vp);
46 static int __init wilc_bus_probe(struct spi_device *spi)
49 PRINT_D(BUS_DBG, "spiModalias: %s\n", spi->modalias);
50 PRINT_D(BUS_DBG, "spiMax-Speed: %d\n", spi->max_speed_hz);
53 printk("Driver Initializing success\n");
57 static int __exit wilc_bus_remove(struct spi_device *spi)
64 static const struct of_device_id wilc1000_of_match[] = {
65 { .compatible = "atmel,wilc_spi", },
68 MODULE_DEVICE_TABLE(of, wilc1000_of_match);
71 struct spi_driver wilc_bus __refdata = {
75 .of_match_table = wilc1000_of_match,
78 .probe = wilc_bus_probe,
79 .remove = __exit_p(wilc_bus_remove),
83 void linux_spi_deinit(void *vp)
86 spi_unregister_driver(&wilc_bus);
89 PRINT_ER("@@@@@@@@@@@@ restore SPI speed to %d @@@@@@@@@\n", SPEED);
95 int linux_spi_init(void *vp)
103 ret = spi_register_driver(&wilc_bus);
106 /* change return value to match WILC interface */
107 (ret < 0) ? (ret = 0) : (ret = 1);
112 #if defined(PLAT_WMS8304)
113 #define TXRX_PHASE_SIZE (4096)
116 #if defined (NM73131_0_BOARD)
118 int linux_spi_write(uint8_t *b, uint32_t len)
123 if (len > 0 && b != NULL) {
124 struct spi_message msg;
125 PRINT_D(BUS_DBG, "Request writing %d bytes\n", len);
126 struct spi_transfer tr = {
133 spi_message_init(&msg);
134 spi_message_add_tail(&tr, &msg);
135 ret = spi_sync(wilc_spi_dev, &msg);
137 PRINT_ER("SPI transaction failed\n");
141 PRINT_ER("can't write data with the following length: %d\n", len);
142 PRINT_ER("FAILED due to NULL buffer or ZERO length check the following length: %d\n", len);
146 /* change return value to match WILC interface */
147 (ret < 0) ? (ret = 0) : (ret = 1);
153 #elif defined(TXRX_PHASE_SIZE)
155 int linux_spi_write(uint8_t *b, uint32_t len)
158 if (len > 0 && b != NULL) {
160 int blk = len / TXRX_PHASE_SIZE;
161 int remainder = len % TXRX_PHASE_SIZE;
163 char *r_buffer = kzalloc(TXRX_PHASE_SIZE, GFP_KERNEL);
165 PRINT_ER("Failed to allocate memory for r_buffer\n");
170 struct spi_message msg;
171 struct spi_transfer tr = {
172 .tx_buf = b + (i * TXRX_PHASE_SIZE),
173 .len = TXRX_PHASE_SIZE,
179 tr.rx_buf = r_buffer;
181 memset(&msg, 0, sizeof(msg));
182 spi_message_init(&msg);
183 msg.spi = wilc_spi_dev;
184 msg.is_dma_mapped = USE_SPI_DMA;
186 spi_message_add_tail(&tr, &msg);
187 ret = spi_sync(wilc_spi_dev, &msg);
189 PRINT_ER("SPI transaction failed\n");
196 struct spi_message msg;
197 struct spi_transfer tr = {
198 .tx_buf = b + (blk * TXRX_PHASE_SIZE),
204 tr.rx_buf = r_buffer;
206 memset(&msg, 0, sizeof(msg));
207 spi_message_init(&msg);
208 msg.spi = wilc_spi_dev;
209 msg.is_dma_mapped = USE_SPI_DMA; /* rachel */
211 spi_message_add_tail(&tr, &msg);
212 ret = spi_sync(wilc_spi_dev, &msg);
214 PRINT_ER("SPI transaction failed\n");
219 PRINT_ER("can't write data with the following length: %d\n", len);
220 PRINT_ER("FAILED due to NULL buffer or ZERO length check the following length: %d\n", len);
224 /* change return value to match WILC interface */
225 (ret < 0) ? (ret = 0) : (ret = 1);
232 int linux_spi_write(uint8_t *b, uint32_t len)
236 struct spi_message msg;
238 if (len > 0 && b != NULL) {
239 struct spi_transfer tr = {
245 char *r_buffer = kzalloc(len, GFP_KERNEL);
247 PRINT_ER("Failed to allocate memory for r_buffer\n");
249 tr.rx_buf = r_buffer;
250 PRINT_D(BUS_DBG, "Request writing %d bytes\n", len);
252 memset(&msg, 0, sizeof(msg));
253 spi_message_init(&msg);
255 msg.spi = wilc_spi_dev;
256 msg.is_dma_mapped = USE_SPI_DMA;
258 spi_message_add_tail(&tr, &msg);
260 ret = spi_sync(wilc_spi_dev, &msg);
262 PRINT_ER("SPI transaction failed\n");
267 PRINT_ER("can't write data with the following length: %d\n", len);
268 PRINT_ER("FAILED due to NULL buffer or ZERO length check the following length: %d\n", len);
272 /* change return value to match WILC interface */
273 (ret < 0) ? (ret = 0) : (ret = 1);
281 #if defined (NM73131_0_BOARD)
283 int linux_spi_read(unsigned char *rb, unsigned long rlen)
289 struct spi_message msg;
290 struct spi_transfer tr = {
298 spi_message_init(&msg);
299 spi_message_add_tail(&tr, &msg);
300 ret = spi_sync(wilc_spi_dev, &msg);
302 PRINT_ER("SPI transaction failed\n");
305 PRINT_ER("can't read data with the following length: %ld\n", rlen);
308 /* change return value to match WILC interface */
309 (ret < 0) ? (ret = 0) : (ret = 1);
314 #elif defined(TXRX_PHASE_SIZE)
316 int linux_spi_read(unsigned char *rb, unsigned long rlen)
323 int blk = rlen / TXRX_PHASE_SIZE;
324 int remainder = rlen % TXRX_PHASE_SIZE;
326 char *t_buffer = kzalloc(TXRX_PHASE_SIZE, GFP_KERNEL);
328 PRINT_ER("Failed to allocate memory for t_buffer\n");
333 struct spi_message msg;
334 struct spi_transfer tr = {
335 .rx_buf = rb + (i * TXRX_PHASE_SIZE),
336 .len = TXRX_PHASE_SIZE,
341 tr.tx_buf = t_buffer;
343 memset(&msg, 0, sizeof(msg));
344 spi_message_init(&msg);
345 msg.spi = wilc_spi_dev;
346 msg.is_dma_mapped = USE_SPI_DMA;
348 spi_message_add_tail(&tr, &msg);
349 ret = spi_sync(wilc_spi_dev, &msg);
351 PRINT_ER("SPI transaction failed\n");
357 struct spi_message msg;
358 struct spi_transfer tr = {
359 .rx_buf = rb + (blk * TXRX_PHASE_SIZE),
365 tr.tx_buf = t_buffer;
367 memset(&msg, 0, sizeof(msg));
368 spi_message_init(&msg);
369 msg.spi = wilc_spi_dev;
370 msg.is_dma_mapped = USE_SPI_DMA; /* rachel */
372 spi_message_add_tail(&tr, &msg);
373 ret = spi_sync(wilc_spi_dev, &msg);
375 PRINT_ER("SPI transaction failed\n");
381 PRINT_ER("can't read data with the following length: %ld\n", rlen);
384 /* change return value to match WILC interface */
385 (ret < 0) ? (ret = 0) : (ret = 1);
391 int linux_spi_read(unsigned char *rb, unsigned long rlen)
397 struct spi_message msg;
398 struct spi_transfer tr = {
405 char *t_buffer = kzalloc(rlen, GFP_KERNEL);
407 PRINT_ER("Failed to allocate memory for t_buffer\n");
409 tr.tx_buf = t_buffer;
411 memset(&msg, 0, sizeof(msg));
412 spi_message_init(&msg);
414 msg.spi = wilc_spi_dev;
415 msg.is_dma_mapped = USE_SPI_DMA;
417 spi_message_add_tail(&tr, &msg);
419 ret = spi_sync(wilc_spi_dev, &msg);
421 PRINT_ER("SPI transaction failed\n");
425 PRINT_ER("can't read data with the following length: %ld\n", rlen);
428 /* change return value to match WILC interface */
429 (ret < 0) ? (ret = 0) : (ret = 1);
436 int linux_spi_write_read(unsigned char *wb, unsigned char *rb, unsigned int rlen)
442 struct spi_message msg;
443 struct spi_transfer tr = {
453 memset(&msg, 0, sizeof(msg));
454 spi_message_init(&msg);
455 msg.spi = wilc_spi_dev;
456 msg.is_dma_mapped = USE_SPI_DMA;
458 spi_message_add_tail(&tr, &msg);
459 ret = spi_sync(wilc_spi_dev, &msg);
461 PRINT_ER("SPI transaction failed\n");
464 PRINT_ER("can't read data with the following length: %d\n", rlen);
467 /* change return value to match WILC interface */
468 (ret < 0) ? (ret = 0) : (ret = 1);
473 int linux_spi_set_max_speed(void)
477 PRINT_INFO(BUS_DBG, "@@@@@@@@@@@@ change SPI speed to %d @@@@@@@@@\n", SPEED);