1 files changed, 0 insertions, 467 deletions
diff --git a/target/linux/generic-2.6/patches-2.6.28/920-00-spi-gpio.patch b/target/linux/generic-2.6/patches-2.6.28/920-00-spi-gpio.patch
deleted file mode 100644
index 960e05a58e..0000000000
--- a/target/linux/generic-2.6/patches-2.6.28/920-00-spi-gpio.patch
+++ /dev/null
@@ -1,467 +0,0 @@
-Port of the SPI-GPIO driver from 2.6.29-rc4.
-
---mb
-
-
-
---- /dev/null
-+++ b/drivers/spi/spi_gpio.c
-@@ -0,0 +1,360 @@
-+/*
-+ * spi_gpio.c - SPI master driver using generic bitbanged GPIO
-+ *
-+ * Copyright (C) 2006,2008 David Brownell
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-+ */
-+#include <linux/kernel.h>
-+#include <linux/init.h>
-+#include <linux/platform_device.h>
-+#include <linux/gpio.h>
-+
-+#include <linux/spi/spi.h>
-+#include <linux/spi/spi_bitbang.h>
-+#include <linux/spi/spi_gpio.h>
-+
-+
-+/*
-+ * This bitbanging SPI master driver should help make systems usable
-+ * when a native hardware SPI engine is not available, perhaps because
-+ * its driver isn't yet working or because the I/O pins it requires
-+ * are used for other purposes.
-+ *
-+ * platform_device->driver_data ... points to spi_gpio
-+ *
-+ * spi->controller_state ... reserved for bitbang framework code
-+ * spi->controller_data ... holds chipselect GPIO
-+ *
-+ * spi->master->dev.driver_data ... points to spi_gpio->bitbang
-+ */
-+
-+struct spi_gpio {
-+	struct spi_bitbang		bitbang;
-+	struct spi_gpio_platform_data	pdata;
-+	struct platform_device		*pdev;
-+};
-+
-+/*----------------------------------------------------------------------*/
-+
-+/*
-+ * Because the overhead of going through four GPIO procedure calls
-+ * per transferred bit can make performance a problem, this code
-+ * is set up so that you can use it in either of two ways:
-+ *
-+ *   - The slow generic way:  set up platform_data to hold the GPIO
-+ *     numbers used for MISO/MOSI/SCK, and issue procedure calls for
-+ *     each of them.  This driver can handle several such busses.
-+ *
-+ *   - The quicker inlined way:  only helps with platform GPIO code
-+ *     that inlines operations for constant GPIOs.  This can give
-+ *     you tight (fast!) inner loops, but each such bus needs a
-+ *     new driver.  You'll define a new C file, with Makefile and
-+ *     Kconfig support; the C code can be a total of six lines:
-+ *
-+ *		#define DRIVER_NAME	"myboard_spi2"
-+ *		#define	SPI_MISO_GPIO	119
-+ *		#define	SPI_MOSI_GPIO	120
-+ *		#define	SPI_SCK_GPIO	121
-+ *		#define	SPI_N_CHIPSEL	4
-+ *		#include "spi_gpio.c"
-+ */
-+
-+#ifndef DRIVER_NAME
-+#define DRIVER_NAME	"spi_gpio"
-+
-+#define GENERIC_BITBANG	/* vs tight inlines */
-+
-+/* all functions referencing these symbols must define pdata */
-+#define SPI_MISO_GPIO	((pdata)->miso)
-+#define SPI_MOSI_GPIO	((pdata)->mosi)
-+#define SPI_SCK_GPIO	((pdata)->sck)
-+
-+#define SPI_N_CHIPSEL	((pdata)->num_chipselect)
-+
-+#endif
-+
-+/*----------------------------------------------------------------------*/
-+
-+static inline const struct spi_gpio_platform_data * __pure
-+spi_to_pdata(const struct spi_device *spi)
-+{
-+	const struct spi_bitbang	*bang;
-+	const struct spi_gpio		*spi_gpio;
-+
-+	bang = spi_master_get_devdata(spi->master);
-+	spi_gpio = container_of(bang, struct spi_gpio, bitbang);
-+	return &spi_gpio->pdata;
-+}
-+
-+/* this is #defined to avoid unused-variable warnings when inlining */
-+#define pdata		spi_to_pdata(spi)
-+
-+static inline void setsck(const struct spi_device *spi, int is_on)
-+{
-+	gpio_set_value(SPI_SCK_GPIO, is_on);
-+}
-+
-+static inline void setmosi(const struct spi_device *spi, int is_on)
-+{
-+	gpio_set_value(SPI_MOSI_GPIO, is_on);
-+}
-+
-+static inline int getmiso(const struct spi_device *spi)
-+{
-+	return gpio_get_value(SPI_MISO_GPIO);
-+}
-+
-+#undef pdata
-+
-+/*
-+ * NOTE:  this clocks "as fast as we can".  It "should" be a function of the
-+ * requested device clock.  Software overhead means we usually have trouble
-+ * reaching even one Mbit/sec (except when we can inline bitops), so for now
-+ * we'll just assume we never need additional per-bit slowdowns.
-+ */
-+#define spidelay(nsecs)	do {} while (0)
-+
-+#define	EXPAND_BITBANG_TXRX
-+#include <linux/spi/spi_bitbang.h>
-+
-+/*
-+ * These functions can leverage inline expansion of GPIO calls to shrink
-+ * costs for a txrx bit, often by factors of around ten (by instruction
-+ * count).  That is particularly visible for larger word sizes, but helps
-+ * even with default 8-bit words.
-+ *
-+ * REVISIT overheads calling these functions for each word also have
-+ * significant performance costs.  Having txrx_bufs() calls that inline
-+ * the txrx_word() logic would help performance, e.g. on larger blocks
-+ * used with flash storage or MMC/SD.  There should also be ways to make
-+ * GCC be less stupid about reloading registers inside the I/O loops,
-+ * even without inlined GPIO calls; __attribute__((hot)) on GCC 4.3?
-+ */
-+
-+static u32 spi_gpio_txrx_word_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_word_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_word_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_word_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 *spi, int is_active)
-+{
-+	unsigned long cs = (unsigned long) spi->controller_data;
-+
-+	/* set initial clock polarity */
-+	if (is_active)
-+		setsck(spi, spi->mode & SPI_CPOL);
-+
-+	/* SPI is normally active-low */
-+	gpio_set_value(cs, (spi->mode & SPI_CS_HIGH) ? is_active : !is_active);
-+}
-+
-+static int spi_gpio_setup(struct spi_device *spi)
-+{
-+	unsigned long	cs = (unsigned long) spi->controller_data;
-+	int		status = 0;
-+
-+	if (spi->bits_per_word > 32)
-+		return -EINVAL;
-+
-+	if (!spi->controller_state) {
-+		status = gpio_request(cs, spi->dev.bus_id);
-+		if (status)
-+			return status;
-+		status = gpio_direction_output(cs, spi->mode & SPI_CS_HIGH);
-+	}
-+	if (!status)
-+		status = spi_bitbang_setup(spi);
-+	if (status) {
-+		if (!spi->controller_state)
-+			gpio_free(cs);
-+	}
-+	return status;
-+}
-+
-+static void spi_gpio_cleanup(struct spi_device *spi)
-+{
-+	unsigned long	cs = (unsigned long) spi->controller_data;
-+
-+	gpio_free(cs);
-+	spi_bitbang_cleanup(spi);
-+}
-+
-+static int __init spi_gpio_alloc(unsigned pin, const char *label, bool is_in)
-+{
-+	int value;
-+
-+	value = gpio_request(pin, label);
-+	if (value == 0) {
-+		if (is_in)
-+			value = gpio_direction_input(pin);
-+		else
-+			value = gpio_direction_output(pin, 0);
-+	}
-+	return value;
-+}
-+
-+static int __init
-+spi_gpio_request(struct spi_gpio_platform_data *pdata, const char *label)
-+{
-+	int value;
-+
-+	/* NOTE:  SPI_*_GPIO symbols may reference "pdata" */
-+
-+	value = spi_gpio_alloc(SPI_MOSI_GPIO, label, false);
-+	if (value)
-+		goto done;
-+
-+	value = spi_gpio_alloc(SPI_MISO_GPIO, label, true);
-+	if (value)
-+		goto free_mosi;
-+
-+	value = spi_gpio_alloc(SPI_SCK_GPIO, label, false);
-+	if (value)
-+		goto free_miso;
-+
-+	goto done;
-+
-+free_miso:
-+	gpio_free(SPI_MISO_GPIO);
-+free_mosi:
-+	gpio_free(SPI_MOSI_GPIO);
-+done:
-+	return value;
-+}
-+
-+static int __init spi_gpio_probe(struct platform_device *pdev)
-+{
-+	int				status;
-+	struct spi_master		*master;
-+	struct spi_gpio			*spi_gpio;
-+	struct spi_gpio_platform_data	*pdata;
-+
-+	pdata = pdev->dev.platform_data;
-+#ifdef GENERIC_BITBANG
-+	if (!pdata || !pdata->num_chipselect)
-+		return -ENODEV;
-+#endif
-+
-+	status = spi_gpio_request(pdata, dev_name(&pdev->dev));
-+	if (status < 0)
-+		return status;
-+
-+	master = spi_alloc_master(&pdev->dev, sizeof *spi_gpio);
-+	if (!master) {
-+		status = -ENOMEM;
-+		goto gpio_free;
-+	}
-+	spi_gpio = spi_master_get_devdata(master);
-+	platform_set_drvdata(pdev, spi_gpio);
-+
-+	spi_gpio->pdev = pdev;
-+	if (pdata)
-+		spi_gpio->pdata = *pdata;
-+
-+	master->bus_num = pdev->id;
-+	master->num_chipselect = SPI_N_CHIPSEL;
-+	master->setup = spi_gpio_setup;
-+	master->cleanup = spi_gpio_cleanup;
-+
-+	spi_gpio->bitbang.master = spi_master_get(master);
-+	spi_gpio->bitbang.chipselect = spi_gpio_chipselect;
-+	spi_gpio->bitbang.txrx_word[SPI_MODE_0] = spi_gpio_txrx_word_mode0;
-+	spi_gpio->bitbang.txrx_word[SPI_MODE_1] = spi_gpio_txrx_word_mode1;
-+	spi_gpio->bitbang.txrx_word[SPI_MODE_2] = spi_gpio_txrx_word_mode2;
-+	spi_gpio->bitbang.txrx_word[SPI_MODE_3] = spi_gpio_txrx_word_mode3;
-+	spi_gpio->bitbang.setup_transfer = spi_bitbang_setup_transfer;
-+	spi_gpio->bitbang.flags = SPI_CS_HIGH;
-+
-+	status = spi_bitbang_start(&spi_gpio->bitbang);
-+	if (status < 0) {
-+		spi_master_put(spi_gpio->bitbang.master);
-+gpio_free:
-+		gpio_free(SPI_MISO_GPIO);
-+		gpio_free(SPI_MOSI_GPIO);
-+		gpio_free(SPI_SCK_GPIO);
-+		spi_master_put(master);
-+	}
-+
-+	return status;
-+}
-+
-+static int __exit spi_gpio_remove(struct platform_device *pdev)
-+{
-+	struct spi_gpio			*spi_gpio;
-+	struct spi_gpio_platform_data	*pdata;
-+	int				status;
-+
-+	spi_gpio = platform_get_drvdata(pdev);
-+	pdata = pdev->dev.platform_data;
-+
-+	/* stop() unregisters child devices too */
-+	status = spi_bitbang_stop(&spi_gpio->bitbang);
-+	spi_master_put(spi_gpio->bitbang.master);
-+
-+	platform_set_drvdata(pdev, NULL);
-+
-+	gpio_free(SPI_MISO_GPIO);
-+	gpio_free(SPI_MOSI_GPIO);
-+	gpio_free(SPI_SCK_GPIO);
-+
-+	return status;
-+}
-+
-+MODULE_ALIAS("platform:" DRIVER_NAME);
-+
-+static struct platform_driver spi_gpio_driver = {
-+	.driver.name	= DRIVER_NAME,
-+	.driver.owner	= THIS_MODULE,
-+	.remove		= __exit_p(spi_gpio_remove),
-+};
-+
-+static int __init spi_gpio_init(void)
-+{
-+	return platform_driver_probe(&spi_gpio_driver, spi_gpio_probe);
-+}
-+module_init(spi_gpio_init);
-+
-+static void __exit spi_gpio_exit(void)
-+{
-+	platform_driver_unregister(&spi_gpio_driver);
-+}
-+module_exit(spi_gpio_exit);
-+
-+
-+MODULE_DESCRIPTION("SPI master driver using generic bitbanged GPIO ");
-+MODULE_AUTHOR("David Brownell");
-+MODULE_LICENSE("GPL");
---- /dev/null
-+++ b/include/linux/spi/spi_gpio.h
-@@ -0,0 +1,60 @@
-+#ifndef __LINUX_SPI_GPIO_H
-+#define __LINUX_SPI_GPIO_H
-+
-+/*
-+ * For each bitbanged SPI bus, set up a platform_device node with:
-+ *   - name "spi_gpio"
-+ *   - id the same as the SPI bus number it implements
-+ *   - dev.platform data pointing to a struct spi_gpio_platform_data
-+ *
-+ * Or, see the driver code for information about speedups that are
-+ * possible on platforms that support inlined access for GPIOs (no
-+ * spi_gpio_platform_data is used).
-+ *
-+ * Use spi_board_info with these busses in the usual way, being sure
-+ * that the controller_data being the GPIO used for each device's
-+ * chipselect:
-+ *
-+ *	static struct spi_board_info ... [] = {
-+ *	...
-+ *		// this slave uses GPIO 42 for its chipselect
-+ *		.controller_data = (void *) 42,
-+ *	...
-+ *		// this one uses GPIO 86 for its chipselect
-+ *		.controller_data = (void *) 86,
-+ *	...
-+ *	};
-+ *
-+ * If the bitbanged bus is later switched to a "native" controller,
-+ * that platform_device and controller_data should be removed.
-+ */
-+
-+/**
-+ * struct spi_gpio_platform_data - parameter for bitbanged SPI master
-+ * @sck: number of the GPIO used for clock output
-+ * @mosi: number of the GPIO used for Master Output, Slave In (MOSI) data
-+ * @miso: number of the GPIO used for Master Input, Slave Output (MISO) data
-+ * @num_chipselect: how many slaves to allow
-+ *
-+ * All GPIO signals used with the SPI bus managed through this driver
-+ * (chipselects, MOSI, MISO, SCK) must be configured as GPIOs, instead
-+ * of some alternate function.
-+ *
-+ * It can be convenient to use this driver with pins that have alternate
-+ * functions associated with a "native" SPI controller if a driver for that
-+ * controller is not available, or is missing important functionality.
-+ *
-+ * On platforms which can do so, configure MISO with a weak pullup unless
-+ * there's an external pullup on that signal.  That saves power by avoiding
-+ * floating signals.  (A weak pulldown would save power too, but many
-+ * drivers expect to see all-ones data as the no slave "response".)
-+ */
-+struct spi_gpio_platform_data {
-+	unsigned	sck;
-+	unsigned	mosi;
-+	unsigned	miso;
-+
-+	u16		num_chipselect;
-+};
-+
-+#endif /* __LINUX_SPI_GPIO_H */
---- a/drivers/spi/Kconfig
-+++ b/drivers/spi/Kconfig
-@@ -100,6 +100,22 @@ config SPI_BUTTERFLY
- 	  inexpensive battery powered microcontroller evaluation board.
- 	  This same cable can be used to flash new firmware.
- 
-+config SPI_GPIO
-+	tristate "GPIO-based bitbanging SPI Master"
-+	depends on GENERIC_GPIO
-+	select SPI_BITBANG
-+	help
-+	  This simple GPIO bitbanging SPI master uses the arch-neutral GPIO
-+	  interface to manage MOSI, MISO, SCK, and chipselect signals.  SPI
-+	  slaves connected to a bus using this driver are configured as usual,
-+	  except that the spi_board_info.controller_data holds the GPIO number
-+	  for the chipselect used by this controller driver.
-+
-+	  Note that this driver often won't achieve even 1 Mbit/sec speeds,
-+	  making it unusually slow for SPI.  If your platform can inline
-+	  GPIO operations, you should be able to leverage that for better
-+	  speed with a custom version of this driver; see the source code.
-+
- config SPI_IMX
- 	tristate "Freescale iMX SPI controller"
- 	depends on ARCH_IMX && EXPERIMENTAL
---- a/drivers/spi/Makefile
-+++ b/drivers/spi/Makefile
-@@ -16,6 +16,7 @@ obj-$(CONFIG_SPI_BFIN)			+= spi_bfin5xx.
- obj-$(CONFIG_SPI_BITBANG)		+= spi_bitbang.o
- obj-$(CONFIG_SPI_AU1550)		+= au1550_spi.o
- obj-$(CONFIG_SPI_BUTTERFLY)		+= spi_butterfly.o
-+obj-$(CONFIG_SPI_GPIO)			+= spi_gpio.o
- obj-$(CONFIG_SPI_IMX)			+= spi_imx.o
- obj-$(CONFIG_SPI_LM70_LLP)		+= spi_lm70llp.o
- obj-$(CONFIG_SPI_PXA2XX)		+= pxa2xx_spi.o