X-Git-Url: http://git.openwrt.org/?p=openwrt%2Fsvn-archive%2Farchive.git;a=blobdiff_plain;f=target%2Flinux%2Far71xx%2Ffiles%2Fdrivers%2Fspi%2Fap83_spi.c;fp=target%2Flinux%2Far71xx%2Ffiles%2Fdrivers%2Fspi%2Fap83_spi.c;h=0000000000000000000000000000000000000000;hp=de8780dbbd360896a792301c7843e233f12312aa;hb=38570889d53a39b928a9d3cbfa781cf807ff1a60;hpb=025fd9901a307fec34905d35e65f8d476fa1e6a7 diff --git a/target/linux/ar71xx/files/drivers/spi/ap83_spi.c b/target/linux/ar71xx/files/drivers/spi/ap83_spi.c deleted file mode 100644 index de8780dbbd..0000000000 --- a/target/linux/ar71xx/files/drivers/spi/ap83_spi.c +++ /dev/null @@ -1,283 +0,0 @@ -/* - * Atheros AP83 board specific SPI Controller driver - * - * Copyright (C) 2009 Gabor Juhos - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * - */ - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include -#include - -#define DRV_DESC "Atheros AP83 board SPI Controller driver" -#define DRV_VERSION "0.1.0" -#define DRV_NAME "ap83-spi" - -#define AP83_SPI_CLK_HIGH (1 << 23) -#define AP83_SPI_CLK_LOW 0 -#define AP83_SPI_MOSI_HIGH (1 << 22) -#define AP83_SPI_MOSI_LOW 0 - -#define AP83_SPI_GPIO_CS 1 -#define AP83_SPI_GPIO_MISO 3 - -struct ap83_spi { - struct spi_bitbang bitbang; - void __iomem *base; - u32 addr; - - struct platform_device *pdev; -}; - -static inline u32 ap83_spi_rr(struct ap83_spi *sp, u32 reg) -{ - return __raw_readl(sp->base + reg); -} - -static inline struct ap83_spi *spidev_to_sp(struct spi_device *spi) -{ - return spi_master_get_devdata(spi->master); -} - -static inline void setsck(struct spi_device *spi, int val) -{ - struct ap83_spi *sp = spidev_to_sp(spi); - - if (val) - sp->addr |= AP83_SPI_CLK_HIGH; - else - sp->addr &= ~AP83_SPI_CLK_HIGH; - - dev_dbg(&spi->dev, "addr=%08x, SCK set to %s\n", - sp->addr, (val) ? "HIGH" : "LOW"); - - ap83_spi_rr(sp, sp->addr); -} - -static inline void setmosi(struct spi_device *spi, int val) -{ - struct ap83_spi *sp = spidev_to_sp(spi); - - if (val) - sp->addr |= AP83_SPI_MOSI_HIGH; - else - sp->addr &= ~AP83_SPI_MOSI_HIGH; - - dev_dbg(&spi->dev, "addr=%08x, MOSI set to %s\n", - sp->addr, (val) ? "HIGH" : "LOW"); - - ap83_spi_rr(sp, sp->addr); -} - -static inline u32 getmiso(struct spi_device *spi) -{ - u32 ret; - - ret = gpio_get_value(AP83_SPI_GPIO_MISO) ? 1 : 0; - dev_dbg(&spi->dev, "get MISO: %d\n", ret); - - return ret; -} - -static inline void do_spidelay(struct spi_device *spi, unsigned nsecs) -{ - ndelay(nsecs); -} - -static void ap83_spi_chipselect(struct spi_device *spi, int on) -{ - struct ap83_spi *sp = spidev_to_sp(spi); - - dev_dbg(&spi->dev, "set CS to %d\n", (on) ? 0 : 1); - - if (on) { - ar71xx_flash_acquire(); - - sp->addr = 0; - ap83_spi_rr(sp, sp->addr); - - gpio_set_value(AP83_SPI_GPIO_CS, 0); - } else { - gpio_set_value(AP83_SPI_GPIO_CS, 1); - ar71xx_flash_release(); - } -} - -#define spidelay(nsecs) \ - do { \ - /* Steal the spi_device pointer from our caller. \ - * The bitbang-API should probably get fixed here... */ \ - do_spidelay(spi, nsecs); \ - } while (0) - -#define EXPAND_BITBANG_TXRX -#include -#include "spi_bitbang_txrx.h" - -static u32 ap83_spi_txrx_mode0(struct spi_device *spi, - unsigned nsecs, u32 word, u8 bits) -{ - dev_dbg(&spi->dev, "TXRX0 word=%08x, bits=%u\n", word, bits); - return bitbang_txrx_be_cpha0(spi, nsecs, 0, 0, word, bits); -} - -static u32 ap83_spi_txrx_mode1(struct spi_device *spi, - unsigned nsecs, u32 word, u8 bits) -{ - dev_dbg(&spi->dev, "TXRX1 word=%08x, bits=%u\n", word, bits); - return bitbang_txrx_be_cpha1(spi, nsecs, 0, 0, word, bits); -} - -static u32 ap83_spi_txrx_mode2(struct spi_device *spi, - unsigned nsecs, u32 word, u8 bits) -{ - dev_dbg(&spi->dev, "TXRX2 word=%08x, bits=%u\n", word, bits); - return bitbang_txrx_be_cpha0(spi, nsecs, 1, 0, word, bits); -} - -static u32 ap83_spi_txrx_mode3(struct spi_device *spi, - unsigned nsecs, u32 word, u8 bits) -{ - dev_dbg(&spi->dev, "TXRX3 word=%08x, bits=%u\n", word, bits); - return bitbang_txrx_be_cpha1(spi, nsecs, 1, 0, word, bits); -} - -static int ap83_spi_probe(struct platform_device *pdev) -{ - struct spi_master *master; - struct ap83_spi *sp; - struct ap83_spi_platform_data *pdata; - struct resource *r; - int ret; - - ret = gpio_request(AP83_SPI_GPIO_MISO, "spi-miso"); - if (ret) { - dev_err(&pdev->dev, "gpio request failed for MISO\n"); - return ret; - } - - ret = gpio_request(AP83_SPI_GPIO_CS, "spi-cs"); - if (ret) { - dev_err(&pdev->dev, "gpio request failed for CS\n"); - goto err_free_miso; - } - - ret = gpio_direction_input(AP83_SPI_GPIO_MISO); - if (ret) { - dev_err(&pdev->dev, "unable to set direction of MISO\n"); - goto err_free_cs; - } - - ret = gpio_direction_output(AP83_SPI_GPIO_CS, 0); - if (ret) { - dev_err(&pdev->dev, "unable to set direction of CS\n"); - goto err_free_cs; - } - - master = spi_alloc_master(&pdev->dev, sizeof(*sp)); - if (master == NULL) { - dev_err(&pdev->dev, "failed to allocate spi master\n"); - return -ENOMEM; - } - - sp = spi_master_get_devdata(master); - platform_set_drvdata(pdev, sp); - - pdata = pdev->dev.platform_data; - - sp->bitbang.master = spi_master_get(master); - sp->bitbang.chipselect = ap83_spi_chipselect; - sp->bitbang.txrx_word[SPI_MODE_0] = ap83_spi_txrx_mode0; - sp->bitbang.txrx_word[SPI_MODE_1] = ap83_spi_txrx_mode1; - sp->bitbang.txrx_word[SPI_MODE_2] = ap83_spi_txrx_mode2; - sp->bitbang.txrx_word[SPI_MODE_3] = ap83_spi_txrx_mode3; - - sp->bitbang.master->bus_num = pdev->id; - sp->bitbang.master->num_chipselect = 1; - - r = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (r == NULL) { - ret = -ENOENT; - goto err_spi_put; - } - - sp->base = ioremap_nocache(r->start, r->end - r->start + 1); - if (!sp->base) { - ret = -ENXIO; - goto err_spi_put; - } - - ret = spi_bitbang_start(&sp->bitbang); - if (!ret) - goto err_unmap; - - dev_info(&pdev->dev, "AP83 SPI adapter at %08x\n", r->start); - - return 0; - -err_unmap: - iounmap(sp->base); -err_spi_put: - platform_set_drvdata(pdev, NULL); - spi_master_put(sp->bitbang.master); - -err_free_cs: - gpio_free(AP83_SPI_GPIO_CS); -err_free_miso: - gpio_free(AP83_SPI_GPIO_MISO); - return ret; -} - -static int ap83_spi_remove(struct platform_device *pdev) -{ - struct ap83_spi *sp = platform_get_drvdata(pdev); - - spi_bitbang_stop(&sp->bitbang); - iounmap(sp->base); - platform_set_drvdata(pdev, NULL); - spi_master_put(sp->bitbang.master); - - return 0; -} - -static struct platform_driver ap83_spi_drv = { - .probe = ap83_spi_probe, - .remove = ap83_spi_remove, - .driver = { - .name = DRV_NAME, - .owner = THIS_MODULE, - }, -}; - -static int __init ap83_spi_init(void) -{ - return platform_driver_register(&ap83_spi_drv); -} -module_init(ap83_spi_init); - -static void __exit ap83_spi_exit(void) -{ - platform_driver_unregister(&ap83_spi_drv); -} -module_exit(ap83_spi_exit); - -MODULE_ALIAS("platform:" DRV_NAME); -MODULE_DESCRIPTION(DRV_DESC); -MODULE_VERSION(DRV_VERSION); -MODULE_AUTHOR("Gabor Juhos "); -MODULE_LICENSE("GPL v2");