diff options
author | Glen Lee <glen.lee@atmel.com> | 2015-12-21 14:18:33 +0900 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-12-21 13:21:09 -0800 |
commit | 43a7622935c72a6724d62d7fb5da35fbe7328f0e (patch) | |
tree | fffd75bc8f7755e373aed6fe904a08193b84b925 /drivers/staging/wilc1000/wilc_spi.c | |
parent | 2769d9422e631559bc672dda9cdb7a5916db4527 (diff) | |
download | op-kernel-dev-43a7622935c72a6724d62d7fb5da35fbe7328f0e.zip op-kernel-dev-43a7622935c72a6724d62d7fb5da35fbe7328f0e.tar.gz |
staging: wilc1000: linux_wlan_spi.c: move all the codes to wilc_spi.c
This patch moves all the codes in linux_wlan_spi.c to wilc_spi.c to make
one spi module. Make wilc_spi_tx, wilc_spi_rx and wilc_spi_tx_rx static
functions. Remove function declaration in linux_wlan_spi.h, which is unnedded
now. No modification has been made inside the codes.
linux_wlan_spi.[ch] will be remove in the next patch.
Signed-off-by: Glen Lee <glen.lee@atmel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/staging/wilc1000/wilc_spi.c')
-rw-r--r-- | drivers/staging/wilc1000/wilc_spi.c | 180 |
1 files changed, 178 insertions, 2 deletions
diff --git a/drivers/staging/wilc1000/wilc_spi.c b/drivers/staging/wilc1000/wilc_spi.c index 0f730cd..86de50c 100644 --- a/drivers/staging/wilc1000/wilc_spi.c +++ b/drivers/staging/wilc1000/wilc_spi.c @@ -6,11 +6,22 @@ /* */ /* */ /* //////////////////////////////////////////////////////////////////////////// */ - +#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 <linux/uaccess.h> +#include <linux/device.h> +#include <linux/spi/spi.h> +#include <linux/of_gpio.h> + +#include "linux_wlan_common.h" #include <linux/string.h> #include "wilc_wlan_if.h" #include "wilc_wlan.h" -#include "linux_wlan_spi.h" #include "wilc_wfi_netdevice.h" typedef struct { @@ -107,6 +118,171 @@ static u8 crc7(u8 crc, const u8 *buffer, u32 len) #define DATA_PKT_SZ_8K (8 * 1024) #define DATA_PKT_SZ DATA_PKT_SZ_8K +#define USE_SPI_DMA 0 + +static const struct wilc1000_ops wilc1000_spi_ops; + +static int wilc_bus_probe(struct spi_device *spi) +{ + int ret, gpio; + struct wilc *wilc; + + gpio = of_get_gpio(spi->dev.of_node, 0); + if (gpio < 0) + gpio = GPIO_NUM; + + ret = wilc_netdev_init(&wilc, NULL, HIF_SPI, GPIO_NUM, &wilc_hif_spi); + if (ret) + return ret; + + spi_set_drvdata(spi, wilc); + wilc->dev = &spi->dev; + + return 0; +} + +static int wilc_bus_remove(struct spi_device *spi) +{ + wilc_netdev_cleanup(spi_get_drvdata(spi)); + return 0; +} + +static const struct of_device_id wilc1000_of_match[] = { + { .compatible = "atmel,wilc_spi", }, + {} +}; +MODULE_DEVICE_TABLE(of, wilc1000_of_match); + +struct spi_driver wilc1000_spi_driver = { + .driver = { + .name = MODALIAS, + .of_match_table = wilc1000_of_match, + }, + .probe = wilc_bus_probe, + .remove = wilc_bus_remove, +}; +module_spi_driver(wilc1000_spi_driver); +MODULE_LICENSE("GPL"); + +static int wilc_spi_tx(struct wilc *wilc, u8 *b, u32 len) +{ + struct spi_device *spi = to_spi_device(wilc->dev); + int ret; + struct spi_message msg; + + if (len > 0 && b) { + struct spi_transfer tr = { + .tx_buf = b, + .len = len, + .delay_usecs = 0, + }; + char *r_buffer = kzalloc(len, GFP_KERNEL); + + if (!r_buffer) + return -ENOMEM; + + tr.rx_buf = r_buffer; + dev_dbg(&spi->dev, "Request writing %d bytes\n", len); + + memset(&msg, 0, sizeof(msg)); + spi_message_init(&msg); + msg.spi = spi; + msg.is_dma_mapped = USE_SPI_DMA; + spi_message_add_tail(&tr, &msg); + + ret = spi_sync(spi, &msg); + if (ret < 0) + dev_err(&spi->dev, "SPI transaction failed\n"); + + kfree(r_buffer); + } else { + dev_err(&spi->dev, + "can't write data with the following length: %d\n", + len); + dev_err(&spi->dev, + "FAILED due to NULL buffer or ZERO length check the following length: %d\n", + len); + ret = -EINVAL; + } + + return ret; +} + +static int wilc_spi_rx(struct wilc *wilc, u8 *rb, u32 rlen) +{ + struct spi_device *spi = to_spi_device(wilc->dev); + int ret; + + if (rlen > 0) { + struct spi_message msg; + struct spi_transfer tr = { + .rx_buf = rb, + .len = rlen, + .delay_usecs = 0, + + }; + char *t_buffer = kzalloc(rlen, GFP_KERNEL); + + if (!t_buffer) + return -ENOMEM; + + tr.tx_buf = t_buffer; + + memset(&msg, 0, sizeof(msg)); + spi_message_init(&msg); + msg.spi = spi; + msg.is_dma_mapped = USE_SPI_DMA; + spi_message_add_tail(&tr, &msg); + + ret = spi_sync(spi, &msg); + if (ret < 0) + dev_err(&spi->dev, "SPI transaction failed\n"); + kfree(t_buffer); + } else { + dev_err(&spi->dev, + "can't read data with the following length: %u\n", + rlen); + ret = -EINVAL; + } + + return ret; +} + +static int wilc_spi_tx_rx(struct wilc *wilc, u8 *wb, u8 *rb, u32 rlen) +{ + struct spi_device *spi = to_spi_device(wilc->dev); + int ret; + + if (rlen > 0) { + struct spi_message msg; + struct spi_transfer tr = { + .rx_buf = rb, + .tx_buf = wb, + .len = rlen, + .bits_per_word = 8, + .delay_usecs = 0, + + }; + + memset(&msg, 0, sizeof(msg)); + spi_message_init(&msg); + msg.spi = spi; + msg.is_dma_mapped = USE_SPI_DMA; + + spi_message_add_tail(&tr, &msg); + ret = spi_sync(spi, &msg); + if (ret < 0) + dev_err(&spi->dev, "SPI transaction failed\n"); + } else { + dev_err(&spi->dev, + "can't read data with the following length: %u\n", + rlen); + ret = -EINVAL; + } + + return ret; +} + static int spi_cmd_complete(struct wilc *wilc, u8 cmd, u32 adr, u8 *b, u32 sz, u8 clockless) { |