move lots of kernel related packages to the new system/ folder

[openwrt/staging/yousong.git] / package / system / wrt55agv2-spidevs / src / wrt55agv2_spidevs.c

diff --git a/package/system/wrt55agv2-spidevs/src/wrt55agv2_spidevs.c b/package/system/wrt55agv2-spidevs/src/wrt55agv2_spidevs.c
new file mode 100644 (file)
index 0000000..dfb7f6a
--- /dev/null
+++ b/package/system/wrt55agv2-spidevs/src/wrt55agv2_spidevs.c
@@ -0,0 +1,114 @@
+/*
+ * SPI driver for the Linksys WRT55AG v2 board.
+ *
+ * Copyright (C) 2008 Gabor Juhos <juhosg at openwrt.org>
+ *
+ * This file was based on the mmc_over_gpio driver:
+ *     Copyright 2008 Michael Buesch <mb@bu3sch.de>
+ *
+ * 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/platform_device.h>
+#include <linux/spi/spi_gpio_old.h>
+#include <linux/module.h>
+
+#define DRV_NAME       "wrt55agv2-spidevs"
+#define DRV_DESC       "SPI driver for the WRT55AG v2 board"
+#define DRV_VERSION    "0.1.0"
+#define PFX            DRV_NAME ": "
+
+#define GPIO_PIN_MISO  1
+#define GPIO_PIN_CS    2
+#define GPIO_PIN_CLK   3
+#define GPIO_PIN_MOSI  4
+
+static struct platform_device *spi_gpio_dev;
+
+static int __init boardinfo_setup(struct spi_board_info *bi,
+               struct spi_master *master, void *data)
+{
+
+       strlcpy(bi->modalias, "spi-ks8995", sizeof(bi->modalias));
+
+       bi->max_speed_hz = 5000000 /* Hz */;
+       bi->bus_num = master->bus_num;
+       bi->mode = SPI_MODE_0;
+
+       return 0;
+}
+
+static int __init wrt55agv2_spidevs_init(void)
+{
+       struct spi_gpio_platform_data pdata;
+       int err;
+
+       spi_gpio_dev = platform_device_alloc("spi-gpio", 0);
+       if (!spi_gpio_dev) {
+               printk(KERN_ERR PFX "no memory for spi-gpio device\n");
+               return -ENOMEM;
+       }
+
+       memset(&pdata, 0, sizeof(pdata));
+       pdata.pin_miso = GPIO_PIN_MISO;
+       pdata.pin_cs = GPIO_PIN_CS;
+       pdata.pin_clk = GPIO_PIN_CLK;
+       pdata.pin_mosi = GPIO_PIN_MOSI;
+       pdata.cs_activelow = 1;
+       pdata.no_spi_delay = 1;
+       pdata.boardinfo_setup = boardinfo_setup;
+       pdata.boardinfo_setup_data = NULL;
+
+       err = platform_device_add_data(spi_gpio_dev, &pdata, sizeof(pdata));
+       if (err)
+               goto err_free_dev;
+
+       err = platform_device_register(spi_gpio_dev);
+       if (err) {
+               printk(KERN_ERR PFX "unable to register device\n");
+               goto err_free_pdata;
+       }
+
+       return 0;
+
+err_free_pdata:
+       kfree(spi_gpio_dev->dev.platform_data);
+       spi_gpio_dev->dev.platform_data = NULL;
+
+err_free_dev:
+       platform_device_put(spi_gpio_dev);
+       return err;
+}
+
+static void __exit wrt55agv2_spidevs_cleanup(void)
+{
+       if (!spi_gpio_dev)
+               return;
+
+       platform_device_unregister(spi_gpio_dev);
+
+       kfree(spi_gpio_dev->dev.platform_data);
+       spi_gpio_dev->dev.platform_data = NULL;
+       platform_device_put(spi_gpio_dev);
+}
+
+static int __init wrt55agv2_spidevs_modinit(void)
+{
+       printk(KERN_INFO DRV_DESC " version " DRV_VERSION "\n");
+       return wrt55agv2_spidevs_init();
+}
+module_init(wrt55agv2_spidevs_modinit);
+
+static void __exit wrt55agv2_spidevs_modexit(void)
+{
+       wrt55agv2_spidevs_cleanup();
+}
+module_exit(wrt55agv2_spidevs_modexit);
+
+MODULE_DESCRIPTION(DRV_DESC);
+MODULE_VERSION(DRV_VERSION);
+MODULE_AUTHOR("Gabor Juhos <juhosg at openwrt.org>");
+MODULE_LICENSE("GPL v2");
+