diff options
Diffstat (limited to 'drivers/staging/wilc1000/linux_wlan_spi.c')
| -rw-r--r-- | drivers/staging/wilc1000/linux_wlan_spi.c | 479 |
1 files changed, 479 insertions, 0 deletions
diff --git a/drivers/staging/wilc1000/linux_wlan_spi.c b/drivers/staging/wilc1000/linux_wlan_spi.c new file mode 100644 index 000000000..236669cfc --- /dev/null +++ b/drivers/staging/wilc1000/linux_wlan_spi.c @@ -0,0 +1,479 @@ +#include <linux/module.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/fs.h> +#include <linux/slab.h> +#include <linux/types.h> +#include <linux/cdev.h> +#include <asm/uaccess.h> +#include <linux/device.h> +#include <linux/spi/spi.h> + +#include "linux_wlan_common.h" + +#define USE_SPI_DMA 0 /* johnny add */ + +#ifdef WILC_ASIC_A0 + #if defined(PLAT_PANDA_ES_OMAP4460) + #define MIN_SPEED 12000000 + #define MAX_SPEED 24000000 + #elif defined(PLAT_WMS8304) + #define MIN_SPEED 12000000 + #define MAX_SPEED 24000000 /* 4000000 */ + #elif defined(CUSTOMER_PLATFORM) +/* + TODO : define Clock speed under 48M. + * + * ex) + * #define MIN_SPEED 24000000 + * #define MAX_SPEED 48000000 + */ + #else + #define MIN_SPEED 24000000 + #define MAX_SPEED 48000000 + #endif +#else /* WILC_ASIC_A0 */ +/* Limit clk to 6MHz on FPGA. */ + #define MIN_SPEED 6000000 + #define MAX_SPEED 6000000 +#endif /* WILC_ASIC_A0 */ + +static uint32_t SPEED = MIN_SPEED; + +struct spi_device *wilc_spi_dev; +void linux_spi_deinit(void *vp); + +static int __init wilc_bus_probe(struct spi_device *spi) +{ + + PRINT_D(BUS_DBG, "spiModalias: %s\n", spi->modalias); + PRINT_D(BUS_DBG, "spiMax-Speed: %d\n", spi->max_speed_hz); + wilc_spi_dev = spi; + + printk("Driver Initializing success\n"); + return 0; +} + +static int __exit wilc_bus_remove(struct spi_device *spi) +{ + + return 0; +} + +#ifdef CONFIG_OF +static const struct of_device_id wilc1000_of_match[] = { + { .compatible = "atmel,wilc_spi", }, + {} +}; +MODULE_DEVICE_TABLE(of, wilc1000_of_match); +#endif + +struct spi_driver wilc_bus __refdata = { + .driver = { + .name = MODALIAS, +#ifdef CONFIG_OF + .of_match_table = wilc1000_of_match, +#endif + }, + .probe = wilc_bus_probe, + .remove = __exit_p(wilc_bus_remove), +}; + + +void linux_spi_deinit(void *vp) +{ + + spi_unregister_driver(&wilc_bus); + + SPEED = MIN_SPEED; + PRINT_ER("@@@@@@@@@@@@ restore SPI speed to %d @@@@@@@@@\n", SPEED); + +} + + + +int linux_spi_init(void *vp) +{ + int ret = 1; + static int called; + + + if (called == 0) { + called++; + ret = spi_register_driver(&wilc_bus); + } + + /* change return value to match WILC interface */ + (ret < 0) ? (ret = 0) : (ret = 1); + + return ret; +} + +#if defined(PLAT_WMS8304) +#define TXRX_PHASE_SIZE (4096) +#endif + +#if defined (NM73131_0_BOARD) + +int linux_spi_write(uint8_t *b, uint32_t len) +{ + + int ret; + + if (len > 0 && b != NULL) { + struct spi_message msg; + PRINT_D(BUS_DBG, "Request writing %d bytes\n", len); + struct spi_transfer tr = { + .tx_buf = b, + .len = len, + .speed_hz = SPEED, + .delay_usecs = 0, + }; + + spi_message_init(&msg); + spi_message_add_tail(&tr, &msg); + ret = spi_sync(wilc_spi_dev, &msg); + if (ret < 0) { + PRINT_ER("SPI transaction failed\n"); + } + + } else { + PRINT_ER("can't write data with the following length: %d\n", len); + PRINT_ER("FAILED due to NULL buffer or ZERO length check the following length: %d\n", len); + ret = -1; + } + + /* change return value to match WILC interface */ + (ret < 0) ? (ret = 0) : (ret = 1); + + + return ret; +} + +#elif defined(TXRX_PHASE_SIZE) + +int linux_spi_write(uint8_t *b, uint32_t len) +{ + int ret; + if (len > 0 && b != NULL) { + int i = 0; + int blk = len / TXRX_PHASE_SIZE; + int remainder = len % TXRX_PHASE_SIZE; + + char *r_buffer = kzalloc(TXRX_PHASE_SIZE, GFP_KERNEL); + if (!r_buffer) { + PRINT_ER("Failed to allocate memory for r_buffer\n"); + } + + if (blk) { + while (i < blk) { + struct spi_message msg; + struct spi_transfer tr = { + .tx_buf = b + (i * TXRX_PHASE_SIZE), + .len = TXRX_PHASE_SIZE, + .speed_hz = SPEED, + .bits_per_word = 8, + .delay_usecs = 0, + }; + + tr.rx_buf = r_buffer; + + memset(&msg, 0, sizeof(msg)); + spi_message_init(&msg); + msg.spi = wilc_spi_dev; + msg.is_dma_mapped = USE_SPI_DMA; + + spi_message_add_tail(&tr, &msg); + ret = spi_sync(wilc_spi_dev, &msg); + if (ret < 0) { + PRINT_ER("SPI transaction failed\n"); + } + i++; + + } + } + if (remainder) { + struct spi_message msg; + struct spi_transfer tr = { + .tx_buf = b + (blk * TXRX_PHASE_SIZE), + .len = remainder, + .speed_hz = SPEED, + .bits_per_word = 8, + .delay_usecs = 0, + }; + tr.rx_buf = r_buffer; + + memset(&msg, 0, sizeof(msg)); + spi_message_init(&msg); + msg.spi = wilc_spi_dev; + msg.is_dma_mapped = USE_SPI_DMA; /* rachel */ + + spi_message_add_tail(&tr, &msg); + ret = spi_sync(wilc_spi_dev, &msg); + if (ret < 0) { + PRINT_ER("SPI transaction failed\n"); + } + } + kfree(r_buffer); + } else { + PRINT_ER("can't write data with the following length: %d\n", len); + PRINT_ER("FAILED due to NULL buffer or ZERO length check the following length: %d\n", len); + ret = -1; + } + + /* change return value to match WILC interface */ + (ret < 0) ? (ret = 0) : (ret = 1); + + return ret; + +} + +#else +int linux_spi_write(uint8_t *b, uint32_t len) +{ + + int ret; + struct spi_message msg; + + if (len > 0 && b != NULL) { + struct spi_transfer tr = { + .tx_buf = b, + .len = len, + .speed_hz = SPEED, + .delay_usecs = 0, + }; + char *r_buffer = kzalloc(len, GFP_KERNEL); + if (!r_buffer) { + PRINT_ER("Failed to allocate memory for r_buffer\n"); + } + tr.rx_buf = r_buffer; + PRINT_D(BUS_DBG, "Request writing %d bytes\n", len); + + memset(&msg, 0, sizeof(msg)); + spi_message_init(&msg); +/* [[johnny add */ + msg.spi = wilc_spi_dev; + msg.is_dma_mapped = USE_SPI_DMA; +/* ]] */ + spi_message_add_tail(&tr, &msg); + + ret = spi_sync(wilc_spi_dev, &msg); + if (ret < 0) { + PRINT_ER("SPI transaction failed\n"); + } + + kfree(r_buffer); + } else { + PRINT_ER("can't write data with the following length: %d\n", len); + PRINT_ER("FAILED due to NULL buffer or ZERO length check the following length: %d\n", len); + ret = -1; + } + + /* change return value to match WILC interface */ + (ret < 0) ? (ret = 0) : (ret = 1); + + + return ret; +} + +#endif + +#if defined (NM73131_0_BOARD) + +int linux_spi_read(unsigned char *rb, unsigned long rlen) +{ + + int ret; + + if (rlen > 0) { + struct spi_message msg; + struct spi_transfer tr = { + .rx_buf = rb, + .len = rlen, + .speed_hz = SPEED, + .delay_usecs = 0, + + }; + + spi_message_init(&msg); + spi_message_add_tail(&tr, &msg); + ret = spi_sync(wilc_spi_dev, &msg); + if (ret < 0) { + PRINT_ER("SPI transaction failed\n"); + } + } else { + PRINT_ER("can't read data with the following length: %ld\n", rlen); + ret = -1; + } + /* change return value to match WILC interface */ + (ret < 0) ? (ret = 0) : (ret = 1); + + return ret; +} + +#elif defined(TXRX_PHASE_SIZE) + +int linux_spi_read(unsigned char *rb, unsigned long rlen) +{ + int ret; + + if (rlen > 0) { + int i = 0; + + int blk = rlen / TXRX_PHASE_SIZE; + int remainder = rlen % TXRX_PHASE_SIZE; + + char *t_buffer = kzalloc(TXRX_PHASE_SIZE, GFP_KERNEL); + if (!t_buffer) { + PRINT_ER("Failed to allocate memory for t_buffer\n"); + } + + if (blk) { + while (i < blk) { + struct spi_message msg; + struct spi_transfer tr = { + .rx_buf = rb + (i * TXRX_PHASE_SIZE), + .len = TXRX_PHASE_SIZE, + .speed_hz = SPEED, + .bits_per_word = 8, + .delay_usecs = 0, + }; + tr.tx_buf = t_buffer; + + memset(&msg, 0, sizeof(msg)); + spi_message_init(&msg); + msg.spi = wilc_spi_dev; + msg.is_dma_mapped = USE_SPI_DMA; + + spi_message_add_tail(&tr, &msg); + ret = spi_sync(wilc_spi_dev, &msg); + if (ret < 0) { + PRINT_ER("SPI transaction failed\n"); + } + i++; + } + } + if (remainder) { + struct spi_message msg; + struct spi_transfer tr = { + .rx_buf = rb + (blk * TXRX_PHASE_SIZE), + .len = remainder, + .speed_hz = SPEED, + .bits_per_word = 8, + .delay_usecs = 0, + }; + tr.tx_buf = t_buffer; + + memset(&msg, 0, sizeof(msg)); + spi_message_init(&msg); + msg.spi = wilc_spi_dev; + msg.is_dma_mapped = USE_SPI_DMA; /* rachel */ + + spi_message_add_tail(&tr, &msg); + ret = spi_sync(wilc_spi_dev, &msg); + if (ret < 0) { + PRINT_ER("SPI transaction failed\n"); + } + } + + kfree(t_buffer); + } else { + PRINT_ER("can't read data with the following length: %ld\n", rlen); + ret = -1; + } + /* change return value to match WILC interface */ + (ret < 0) ? (ret = 0) : (ret = 1); + + return ret; +} + +#else +int linux_spi_read(unsigned char *rb, unsigned long rlen) +{ + + int ret; + + if (rlen > 0) { + struct spi_message msg; + struct spi_transfer tr = { + .rx_buf = rb, + .len = rlen, + .speed_hz = SPEED, + .delay_usecs = 0, + + }; + char *t_buffer = kzalloc(rlen, GFP_KERNEL); + if (!t_buffer) { + PRINT_ER("Failed to allocate memory for t_buffer\n"); + } + tr.tx_buf = t_buffer; + + memset(&msg, 0, sizeof(msg)); + spi_message_init(&msg); +/* [[ johnny add */ + msg.spi = wilc_spi_dev; + msg.is_dma_mapped = USE_SPI_DMA; +/* ]] */ + spi_message_add_tail(&tr, &msg); + + ret = spi_sync(wilc_spi_dev, &msg); + if (ret < 0) { + PRINT_ER("SPI transaction failed\n"); + } + kfree(t_buffer); + } else { + PRINT_ER("can't read data with the following length: %ld\n", rlen); + ret = -1; + } + /* change return value to match WILC interface */ + (ret < 0) ? (ret = 0) : (ret = 1); + + return ret; +} + +#endif + +int linux_spi_write_read(unsigned char *wb, unsigned char *rb, unsigned int rlen) +{ + + int ret; + + if (rlen > 0) { + struct spi_message msg; + struct spi_transfer tr = { + .rx_buf = rb, + .tx_buf = wb, + .len = rlen, + .speed_hz = SPEED, + .bits_per_word = 8, + .delay_usecs = 0, + + }; + + memset(&msg, 0, sizeof(msg)); + spi_message_init(&msg); + msg.spi = wilc_spi_dev; + msg.is_dma_mapped = USE_SPI_DMA; + + spi_message_add_tail(&tr, &msg); + ret = spi_sync(wilc_spi_dev, &msg); + if (ret < 0) { + PRINT_ER("SPI transaction failed\n"); + } + } else { + PRINT_ER("can't read data with the following length: %d\n", rlen); + ret = -1; + } + /* change return value to match WILC interface */ + (ret < 0) ? (ret = 0) : (ret = 1); + + return ret; +} + +int linux_spi_set_max_speed(void) +{ + SPEED = MAX_SPEED; + + PRINT_INFO(BUS_DBG, "@@@@@@@@@@@@ change SPI speed to %d @@@@@@@@@\n", SPEED); + return 1; +} |