spi: reorganize drivers

Sort the SPI makefile and enforce the naming convention spi_*.c for
spi drivers.

This change also rolls the contents of atmel_spi.h into the .c file
since there is only one user of that particular include file.

v2: - Use 'spi-' prefix instead of 'spi_' to match what seems to be
      be the predominant pattern for subsystem prefixes.
    - Clean up filenames in Kconfig and header comment blocks

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Wolfram Sang <w.sang@pengutronix.de>
Acked-by: Linus Walleij <linus.walleij@linaro.org>

1 files changed, 200 insertions, 0 deletions

diff --git a/drivers/spi/spi-s3c24xx-gpio.c b/drivers/spi/spi-s3c24xx-gpio.c
new file mode 100644
index 00000000000..2d3c085930f
--- /dev/null
+++ b/drivers/spi/spi-s3c24xx-gpio.c
@@ -0,0 +1,200 @@
+/*
+ * Copyright (c) 2006 Ben Dooks
+ * Copyright (c) 2006 Simtec Electronics
+ *
+ * S3C24XX GPIO based SPI driver
+ *
+ * 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/platform_device.h>
+#include <linux/gpio.h>
+
+#include <linux/spi/spi.h>
+#include <linux/spi/spi_bitbang.h>
+
+#include <mach/regs-gpio.h>
+#include <mach/spi-gpio.h>
+#include <mach/hardware.h>
+
+struct s3c2410_spigpio {
+	struct spi_bitbang		 bitbang;
+
+	struct s3c2410_spigpio_info	*info;
+	struct platform_device		*dev;
+};
+
+static inline struct s3c2410_spigpio *spidev_to_sg(struct spi_device *spi)
+{
+	return spi_master_get_devdata(spi->master);
+}
+
+static inline void setsck(struct spi_device *dev, int on)
+{
+	struct s3c2410_spigpio *sg = spidev_to_sg(dev);
+	s3c2410_gpio_setpin(sg->info->pin_clk, on ? 1 : 0);
+}
+
+static inline void setmosi(struct spi_device *dev, int on)
+{
+	struct s3c2410_spigpio *sg = spidev_to_sg(dev);
+	s3c2410_gpio_setpin(sg->info->pin_mosi, on ? 1 : 0);
+}
+
+static inline u32 getmiso(struct spi_device *dev)
+{
+	struct s3c2410_spigpio *sg = spidev_to_sg(dev);
+	return s3c2410_gpio_getpin(sg->info->pin_miso) ? 1 : 0;
+}
+
+#define spidelay(x) ndelay(x)
+
+#include "spi-bitbang-txrx.h"
+
+
+static u32 s3c2410_spigpio_txrx_mode0(struct spi_device *spi,
+				      unsigned nsecs, u32 word, u8 bits)
+{
+	return bitbang_txrx_be_cpha0(spi, nsecs, 0, 0, word, bits);
+}
+
+static u32 s3c2410_spigpio_txrx_mode1(struct spi_device *spi,
+				      unsigned nsecs, u32 word, u8 bits)
+{
+	return bitbang_txrx_be_cpha1(spi, nsecs, 0, 0, word, bits);
+}
+
+static u32 s3c2410_spigpio_txrx_mode2(struct spi_device *spi,
+				      unsigned nsecs, u32 word, u8 bits)
+{
+	return bitbang_txrx_be_cpha0(spi, nsecs, 1, 0, word, bits);
+}
+
+static u32 s3c2410_spigpio_txrx_mode3(struct spi_device *spi,
+				      unsigned nsecs, u32 word, u8 bits)
+{
+	return bitbang_txrx_be_cpha1(spi, nsecs, 1, 0, word, bits);
+}
+
+
+static void s3c2410_spigpio_chipselect(struct spi_device *dev, int value)
+{
+	struct s3c2410_spigpio *sg = spidev_to_sg(dev);
+
+	if (sg->info && sg->info->chip_select)
+		(sg->info->chip_select)(sg->info, value);
+}
+
+static int s3c2410_spigpio_probe(struct platform_device *dev)
+{
+	struct s3c2410_spigpio_info *info;
+	struct spi_master	*master;
+	struct s3c2410_spigpio  *sp;
+	int ret;
+
+	master = spi_alloc_master(&dev->dev, sizeof(struct s3c2410_spigpio));
+	if (master == NULL) {
+		dev_err(&dev->dev, "failed to allocate spi master\n");
+		ret = -ENOMEM;
+		goto err;
+	}
+
+	sp = spi_master_get_devdata(master);
+
+	platform_set_drvdata(dev, sp);
+
+	/* copy in the plkatform data */
+	info = sp->info = dev->dev.platform_data;
+
+	/* setup spi bitbang adaptor */
+	sp->bitbang.master = spi_master_get(master);
+	sp->bitbang.master->bus_num = info->bus_num;
+	sp->bitbang.master->num_chipselect = info->num_chipselect;
+	sp->bitbang.chipselect = s3c2410_spigpio_chipselect;
+
+	sp->bitbang.txrx_word[SPI_MODE_0] = s3c2410_spigpio_txrx_mode0;
+	sp->bitbang.txrx_word[SPI_MODE_1] = s3c2410_spigpio_txrx_mode1;
+	sp->bitbang.txrx_word[SPI_MODE_2] = s3c2410_spigpio_txrx_mode2;
+	sp->bitbang.txrx_word[SPI_MODE_3] = s3c2410_spigpio_txrx_mode3;
+
+	/* set state of spi pins, always assume that the clock is
+	 * available, but do check the MOSI and MISO. */
+	s3c2410_gpio_setpin(info->pin_clk, 0);
+	s3c2410_gpio_cfgpin(info->pin_clk, S3C2410_GPIO_OUTPUT);
+
+	if (info->pin_mosi < S3C2410_GPH10) {
+		s3c2410_gpio_setpin(info->pin_mosi, 0);
+		s3c2410_gpio_cfgpin(info->pin_mosi, S3C2410_GPIO_OUTPUT);
+	}
+
+	if (info->pin_miso != S3C2410_GPA0 && info->pin_miso < S3C2410_GPH10)
+		s3c2410_gpio_cfgpin(info->pin_miso, S3C2410_GPIO_INPUT);
+
+	ret = spi_bitbang_start(&sp->bitbang);
+	if (ret)
+		goto err_no_bitbang;
+
+	return 0;
+
+ err_no_bitbang:
+	spi_master_put(sp->bitbang.master);
+ err:
+	return ret;
+
+}
+
+static int s3c2410_spigpio_remove(struct platform_device *dev)
+{
+	struct s3c2410_spigpio *sp = platform_get_drvdata(dev);
+
+	spi_bitbang_stop(&sp->bitbang);
+	spi_master_put(sp->bitbang.master);
+
+	return 0;
+}
+
+/* all gpio should be held over suspend/resume, so we should
+ * not need to deal with this
+*/
+
+#define s3c2410_spigpio_suspend NULL
+#define s3c2410_spigpio_resume NULL
+
+/* work with hotplug and coldplug */
+MODULE_ALIAS("platform:spi_s3c24xx_gpio");
+
+static struct platform_driver s3c2410_spigpio_drv = {
+	.probe		= s3c2410_spigpio_probe,
+        .remove		= s3c2410_spigpio_remove,
+        .suspend	= s3c2410_spigpio_suspend,
+        .resume		= s3c2410_spigpio_resume,
+        .driver		= {
+		.name	= "spi_s3c24xx_gpio",
+		.owner	= THIS_MODULE,
+        },
+};
+
+static int __init s3c2410_spigpio_init(void)
+{
+        return platform_driver_register(&s3c2410_spigpio_drv);
+}
+
+static void __exit s3c2410_spigpio_exit(void)
+{
+        platform_driver_unregister(&s3c2410_spigpio_drv);
+}
+
+module_init(s3c2410_spigpio_init);
+module_exit(s3c2410_spigpio_exit);
+
+MODULE_DESCRIPTION("S3C24XX SPI Driver");
+MODULE_AUTHOR("Ben Dooks, <ben@simtec.co.uk>");
+MODULE_LICENSE("GPL");