diff options
Diffstat (limited to 'package/mmc_over_gpio')
| -rw-r--r-- | package/mmc_over_gpio/Makefile | 11 | ||||
| -rw-r--r-- | package/mmc_over_gpio/src/Makefile | 1 | ||||
| -rw-r--r-- | package/mmc_over_gpio/src/linux/spi/spi_gpio.h | 53 | ||||
| -rw-r--r-- | package/mmc_over_gpio/src/mmc_over_spigpio.c | 2 | ||||
| -rw-r--r-- | package/mmc_over_gpio/src/spi_gpio.c | 242 |
5 files changed, 6 insertions, 303 deletions
diff --git a/package/mmc_over_gpio/Makefile b/package/mmc_over_gpio/Makefile index 46847a50f..42c666cd3 100644 --- a/package/mmc_over_gpio/Makefile +++ b/package/mmc_over_gpio/Makefile @@ -1,4 +1,4 @@ -# +# # Copyright (C) 2008 OpenWrt.org # # This is free software, licensed under the GNU General Public License v2. @@ -10,18 +10,17 @@ include $(TOPDIR)/rules.mk include $(INCLUDE_DIR)/kernel.mk PKG_NAME:=mmc-over-gpio -PKG_RELEASE:=1 +PKG_RELEASE:=2 include $(INCLUDE_DIR)/package.mk define KernelPackage/mmc-over-gpio SUBMENU:=Other modules - DEPENDS:=@LINUX_2_6 +kmod-spi +kmod-spi-bitbang +kmod-mmc +kmod-mmc-spi @!TARGET_x86 + DEPENDS:=@LINUX_2_6 +kmod-mmc-spi +kmod-spi-gpio @!TARGET_x86 TITLE:=MMC/SD card over GPIO support - FILES:=$(PKG_BUILD_DIR)/spi_gpio.$(LINUX_KMOD_SUFFIX) \ - $(PKG_BUILD_DIR)/mmc_over_spigpio.$(LINUX_KMOD_SUFFIX) - AUTOLOAD:=$(call AutoLoad,92,spi_gpio mmc_over_spigpio) + FILES:=$(PKG_BUILD_DIR)/mmc_over_spigpio.$(LINUX_KMOD_SUFFIX) + AUTOLOAD:=$(call AutoLoad,93,spi_gpio mmc_over_spigpio) endef define KernelPackage/mmc-over-gpio/description diff --git a/package/mmc_over_gpio/src/Makefile b/package/mmc_over_gpio/src/Makefile index d2258bb95..b052c405a 100644 --- a/package/mmc_over_gpio/src/Makefile +++ b/package/mmc_over_gpio/src/Makefile @@ -1,2 +1 @@ -obj-m += spi_gpio.o obj-m += mmc_over_spigpio.o diff --git a/package/mmc_over_gpio/src/linux/spi/spi_gpio.h b/package/mmc_over_gpio/src/linux/spi/spi_gpio.h deleted file mode 100644 index 8e7d4b189..000000000 --- a/package/mmc_over_gpio/src/linux/spi/spi_gpio.h +++ /dev/null @@ -1,53 +0,0 @@ -/* - * spi_gpio interface to platform code - * - * Copyright (c) 2008 Piotr Skamruk - * - * 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. - */ -#ifndef _LINUX_SPI_SPI_GPIO -#define _LINUX_SPI_SPI_GPIO - -#include <linux/types.h> -#include <linux/spi/spi.h> - - -/** struct spi_gpio_platform_data - Data definitions for a SPI-GPIO device. - * This structure holds information about a GPIO-based SPI device. - * - * @pin_clk: The GPIO pin number of the CLOCK pin. - * - * @pin_miso: The GPIO pin number of the MISO pin. - * - * @pin_mosi: The GPIO pin number of the MOSI pin. - * - * @pin_cs: The GPIO pin number of the CHIPSELECT pin. - * - * @cs_activelow: If true, the chip is selected when the CS line is low. - * - * @no_spi_delay: If true, no delay is done in the lowlevel bitbanging. - * Note that doing no delay is not standards compliant, - * but it might be needed to speed up transfers on some - * slow embedded machines. - * - * @boardinfo_setup: This callback is called after the - * SPI master device was registered, but before the - * device is registered. - * @boardinfo_setup_data: Data argument passed to boardinfo_setup(). - */ -struct spi_gpio_platform_data { - unsigned int pin_clk; - unsigned int pin_miso; - unsigned int pin_mosi; - unsigned int pin_cs; - bool cs_activelow; - bool no_spi_delay; - int (*boardinfo_setup)(struct spi_board_info *bi, - struct spi_master *master, - void *data); - void *boardinfo_setup_data; -}; - -#endif /* _LINUX_SPI_SPI_GPIO */ diff --git a/package/mmc_over_gpio/src/mmc_over_spigpio.c b/package/mmc_over_gpio/src/mmc_over_spigpio.c index 36dbd0f6a..113b518a5 100644 --- a/package/mmc_over_gpio/src/mmc_over_spigpio.c +++ b/package/mmc_over_gpio/src/mmc_over_spigpio.c @@ -9,7 +9,7 @@ #include <linux/platform_device.h> #include <linux/list.h> #include <linux/mutex.h> -#include "linux/spi/spi_gpio.h" //XXX +#include <linux/spi/spi_gpio.h> /* This is the maximum speed in Hz */ diff --git a/package/mmc_over_gpio/src/spi_gpio.c b/package/mmc_over_gpio/src/spi_gpio.c deleted file mode 100644 index 31048acc3..000000000 --- a/package/mmc_over_gpio/src/spi_gpio.c +++ /dev/null @@ -1,242 +0,0 @@ -/* - * Bitbanging SPI bus driver using GPIO API - * - * Copyright (c) 2008 Piotr Skamruk - * Copyright (c) 2008 Michael Buesch - * - * based on spi_s3c2410_gpio.c - * Copyright (c) 2006 Ben Dooks - * Copyright (c) 2006 Simtec Electronics - * and on i2c-gpio.c - * Copyright (C) 2007 Atmel Corporation - * - * 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 <linux/kernel.h> -#include <linux/init.h> -#include <linux/delay.h> -#include <linux/spinlock.h> -#include <linux/workqueue.h> -#include <linux/module.h> -#include <linux/platform_device.h> -#include <linux/spi/spi.h> -#include <linux/spi/spi_bitbang.h> -#include "linux/spi/spi_gpio.h" //XXX -#include <asm/gpio.h> - - -struct spi_gpio { - struct spi_bitbang bitbang; - struct spi_gpio_platform_data *info; - struct platform_device *pdev; - struct spi_board_info bi; -}; - - -static inline struct spi_gpio *spidev_to_sg(struct spi_device *dev) -{ - return dev->controller_data; -} - -static inline void setsck(struct spi_device *dev, int val) -{ - struct spi_gpio *sp = spidev_to_sg(dev); - gpio_set_value(sp->info->pin_clk, val ? 1 : 0); -} - -static inline void setmosi(struct spi_device *dev, int val ) -{ - struct spi_gpio *sp = spidev_to_sg(dev); - gpio_set_value(sp->info->pin_mosi, val ? 1 : 0); -} - -static inline u32 getmiso(struct spi_device *dev) -{ - struct spi_gpio *sp = spidev_to_sg(dev); - return gpio_get_value(sp->info->pin_miso) ? 1 : 0; -} - -static inline void do_spidelay(struct spi_device *dev, unsigned nsecs) -{ - struct spi_gpio *sp = spidev_to_sg(dev); - - if (!sp->info->no_spi_delay) - ndelay(nsecs); -} - -#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 <linux/spi/spi_bitbang.h> - -static u32 spi_gpio_txrx_mode0(struct spi_device *spi, - unsigned nsecs, u32 word, u8 bits) -{ - return bitbang_txrx_be_cpha0(spi, nsecs, 0, word, bits); -} - -static u32 spi_gpio_txrx_mode1(struct spi_device *spi, - unsigned nsecs, u32 word, u8 bits) -{ - return bitbang_txrx_be_cpha1(spi, nsecs, 0, word, bits); -} - -static u32 spi_gpio_txrx_mode2(struct spi_device *spi, - unsigned nsecs, u32 word, u8 bits) -{ - return bitbang_txrx_be_cpha0(spi, nsecs, 1, word, bits); -} - -static u32 spi_gpio_txrx_mode3(struct spi_device *spi, - unsigned nsecs, u32 word, u8 bits) -{ - return bitbang_txrx_be_cpha1(spi, nsecs, 1, word, bits); -} - -static void spi_gpio_chipselect(struct spi_device *dev, int on) -{ - struct spi_gpio *sp = spidev_to_sg(dev); - - if (sp->info->cs_activelow) - on = !on; - gpio_set_value(sp->info->pin_cs, on ? 1 : 0); -} - -static int spi_gpio_probe(struct platform_device *pdev) -{ - struct spi_master *master; - struct spi_gpio_platform_data *pdata; - struct spi_gpio *sp; - struct spi_device *spidev; - int err; - - pdata = pdev->dev.platform_data; - if (!pdata) - return -ENXIO; - - err = -ENOMEM; - master = spi_alloc_master(&pdev->dev, sizeof(struct spi_gpio)); - if (!master) - goto err_alloc_master; - - sp = spi_master_get_devdata(master); - platform_set_drvdata(pdev, sp); - sp->info = pdata; - - err = gpio_request(pdata->pin_clk, "spi_clock"); - if (err) - goto err_request_clk; - err = gpio_request(pdata->pin_mosi, "spi_mosi"); - if (err) - goto err_request_mosi; - err = gpio_request(pdata->pin_miso, "spi_miso"); - if (err) - goto err_request_miso; - err = gpio_request(pdata->pin_cs, "spi_cs"); - if (err) - goto err_request_cs; - - sp->bitbang.master = spi_master_get(master); - sp->bitbang.master->bus_num = -1; - sp->bitbang.master->num_chipselect = 1; - sp->bitbang.chipselect = spi_gpio_chipselect; - sp->bitbang.txrx_word[SPI_MODE_0] = spi_gpio_txrx_mode0; - sp->bitbang.txrx_word[SPI_MODE_1] = spi_gpio_txrx_mode1; - sp->bitbang.txrx_word[SPI_MODE_2] = spi_gpio_txrx_mode2; - sp->bitbang.txrx_word[SPI_MODE_3] = spi_gpio_txrx_mode3; - - gpio_direction_output(pdata->pin_clk, 0); - gpio_direction_output(pdata->pin_mosi, 0); - gpio_direction_output(pdata->pin_cs, - pdata->cs_activelow ? 1 : 0); - gpio_direction_input(pdata->pin_miso); - - err = spi_bitbang_start(&sp->bitbang); - if (err) - goto err_no_bitbang; - err = pdata->boardinfo_setup(&sp->bi, master, - pdata->boardinfo_setup_data); - if (err) - goto err_bi_setup; - sp->bi.controller_data = sp; - spidev = spi_new_device(master, &sp->bi); - if (!spidev) - goto err_new_dev; - - return 0; - -err_new_dev: -err_bi_setup: - spi_bitbang_stop(&sp->bitbang); -err_no_bitbang: - spi_master_put(sp->bitbang.master); - gpio_free(pdata->pin_cs); -err_request_cs: - gpio_free(pdata->pin_miso); -err_request_miso: - gpio_free(pdata->pin_mosi); -err_request_mosi: - gpio_free(pdata->pin_clk); -err_request_clk: - kfree(master); - -err_alloc_master: - return err; -} - -static int __devexit spi_gpio_remove(struct platform_device *pdev) -{ - struct spi_gpio *sp; - struct spi_gpio_platform_data *pdata; - - pdata = pdev->dev.platform_data; - sp = platform_get_drvdata(pdev); - - gpio_free(pdata->pin_clk); - gpio_free(pdata->pin_mosi); - gpio_free(pdata->pin_miso); - gpio_free(pdata->pin_cs); - spi_bitbang_stop(&sp->bitbang); - spi_master_put(sp->bitbang.master); - - return 0; -} - -static struct platform_driver spi_gpio_driver = { - .driver = { - .name = "spi-gpio", - .owner = THIS_MODULE, - }, - .probe = spi_gpio_probe, - .remove = __devexit_p(spi_gpio_remove), -}; - -static int __init spi_gpio_init(void) -{ - int err; - - err = platform_driver_register(&spi_gpio_driver); - if (err) - printk(KERN_ERR "spi-gpio: register failed: %d\n", err); - - return err; -} -module_init(spi_gpio_init); - -static void __exit spi_gpio_exit(void) -{ - platform_driver_unregister(&spi_gpio_driver); -} -module_exit(spi_gpio_exit); - -MODULE_AUTHOR("Piot Skamruk <piotr.skamruk at gmail.com>"); -MODULE_AUTHOR("Michael Buesch"); -MODULE_DESCRIPTION("Platform independent GPIO bitbangling SPI driver"); -MODULE_LICENSE("GPL v2"); |