move spi_gpio driver into the kernel, clean-up SPI modules

SVN-Revision: 10844

6 files changed, 46 insertions, 322 deletions

diff --git a/package/kernel/modules/other.mk b/package/kernel/modules/other.mk
index b1f3c50..3872b3c 100644
--- a/package/kernel/modules/other.mk
+++ b/package/kernel/modules/other.mk
@@ -535,7 +535,7 @@ $(eval $(call KernelPackage,input-gpio-buttons))
 define KernelPackage/mmc-spi
   SUBMENU:=$(OTHER_MENU)
   TITLE:=MMC/SD over SPI Support
-  DEPENDS:=@LINUX_2_6
+  DEPENDS:=@LINUX_2_6 +kmod-mmc +kmod-spi +kmod-crc-itu-t +kmod-crc7
   KCONFIG:=CONFIG_MMC_SPI
   FILES:=$(LINUX_DIR)/drivers/mmc/host/mmc_spi.$(LINUX_KMOD_SUFFIX)
   AUTOLOAD:=$(call AutoLoad,90,mmc_spi)
@@ -564,32 +564,22 @@ $(eval $(call KernelPackage,mmc-atmelmci))
 
 define KernelPackage/spi
   SUBMENU:=$(OTHER_MENU)
-  TITLE:=Serial Peripheral Interface
-  DEPENDS:=@LINUX_2_6 +kmod-crc-itu-t +kmod-crc7
-  KCONFIG:=CONFIG_SPI=y \
-	CONFIG_MTD_DATAFLASH \
-	CONFIG_MTD_M25P80 \
-	CONFIG_SPI_AT25 \
-	CONFIG_SPI_SPIDEV \
-	CONFIG_SPI_TLE62X0
-  FILES:= \
-	$(LINUX_DIR)/drivers/spi/at25.$(LINUX_KMOD_SUFFIX) \
-	$(LINUX_DIR)/drivers/spi/spidev.$(LINUX_KMOD_SUFFIX) \
-	$(LINUX_DIR)/drivers/spi/tle62x0.$(LINUX_KMOD_SUFFIX) \
-	$(LINUX_DIR)/drivers/mtd/devices/m25p80.$(LINUX_KMOD_SUFFIX) \
-	$(LINUX_DIR)/drivers/mtd/devices/mtd_dataflash.$(LINUX_KMOD_SUFFIX)
-  AUTOLOAD:=$(call AutoLoad,90,spi)
+  TITLE:=Serial Peripheral Interface support
+  DEPENDS:=@LINUX_2_6
+  KCONFIG:=\
+	CONFIG_SPI=y \
+	CONFIG_SPI_MASTER=y
 endef
 
 define KernelPackage/spi/description
- This package contains the Serial Peripheral Interface driver
+ This package contains the Serial Peripheral Interface Master driver
 endef
 
 $(eval $(call KernelPackage,spi))
 
 define KernelPackage/spi-bitbang
   SUBMENU:=$(OTHER_MENU)
-  TITLE:=Serial Peripheral Interface bitbanging
+  TITLE:=Serial Peripheral Interface bitbanging library
   DEPENDS:=@LINUX_2_6 +kmod-spi
   KCONFIG:=CONFIG_SPI_BITBANG
   FILES:=$(LINUX_DIR)/drivers/spi/spi_bitbang.$(LINUX_KMOD_SUFFIX)
@@ -597,7 +587,38 @@ define KernelPackage/spi-bitbang
 endef
 
 define KernelPackage/spi-bitbang/description
- This package contains the Serial Peripheral Interface bitbanging library
+ This package contains the SPI bitbanging library
 endef
 
 $(eval $(call KernelPackage,spi-bitbang))
+
+define KernelPackage/spi-gpio
+  SUBMENU:=$(OTHER_MENU)
+  TITLE:=GPIO based bitbanging SPI controller
+  DEPENDS:=@LINUX_2_6 +kmod-spi-bitbang
+  KCONFIG:=CONFIG_SPI_GPIO
+  FILES:=$(LINUX_DIR)/drivers/spi/spi_gpio.$(LINUX_KMOD_SUFFIX)
+  AUTOLOAD:=$(call AutoLoad,92,spi_gpio)
+endef
+
+define KernelPackage/spi-gpio/description
+ This package contains the GPIO based bitbanging SPI controller driver
+endef
+
+$(eval $(call KernelPackage,spi-gpio))
+
+define KernelPackage/spi-dev
+  SUBMENU:=$(OTHER_MENU)
+  TITLE:=User mode SPI device driver
+  DEPENDS:=@LINUX_2_6 +kmod-spi
+  KCONFIG:=CONFIG_SPI_SPIDEV
+  FILES:=$(LINUX_DIR)/drivers/spi/spidev.$(LINUX_KMOD_SUFFIX)
+  AUTOLOAD:=$(call AutoLoad,91,spidev)
+endef
+
+define KernelPackage/spi-dev/description
+ This package contains the user mode SPI device driver
+endef
+
+$(eval $(call KernelPackage,spi-dev))
+
diff --git a/package/mmc_over_gpio/Makefile b/package/mmc_over_gpio/Makefile
index 46847a5..42c666c 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 d2258bb..b052c40 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 8e7d4b1..0000000
--- 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 36dbd0f..113b518 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 31048ac..0000000
--- 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");