diff options
Diffstat (limited to 'ANDROID_3.4.5/drivers/i2c/busses/i2c-simtec.c')
| -rw-r--r-- | ANDROID_3.4.5/drivers/i2c/busses/i2c-simtec.c | 175 |
1 files changed, 0 insertions, 175 deletions
diff --git a/ANDROID_3.4.5/drivers/i2c/busses/i2c-simtec.c b/ANDROID_3.4.5/drivers/i2c/busses/i2c-simtec.c deleted file mode 100644 index 4fc87e7c..00000000 --- a/ANDROID_3.4.5/drivers/i2c/busses/i2c-simtec.c +++ /dev/null @@ -1,175 +0,0 @@ -/* - * Copyright (C) 2005 Simtec Electronics - * Ben Dooks <ben@simtec.co.uk> - * - * Simtec Generic I2C Controller - * - * 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 - * - * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA -*/ - -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/init.h> -#include <linux/delay.h> -#include <linux/platform_device.h> -#include <linux/slab.h> -#include <linux/io.h> - -#include <linux/i2c.h> -#include <linux/i2c-algo-bit.h> - -struct simtec_i2c_data { - struct resource *ioarea; - void __iomem *reg; - struct i2c_adapter adap; - struct i2c_algo_bit_data bit; -}; - -#define CMD_SET_SDA (1<<2) -#define CMD_SET_SCL (1<<3) - -#define STATE_SDA (1<<0) -#define STATE_SCL (1<<1) - -/* i2c bit-bus functions */ - -static void simtec_i2c_setsda(void *pw, int state) -{ - struct simtec_i2c_data *pd = pw; - writeb(CMD_SET_SDA | (state ? STATE_SDA : 0), pd->reg); -} - -static void simtec_i2c_setscl(void *pw, int state) -{ - struct simtec_i2c_data *pd = pw; - writeb(CMD_SET_SCL | (state ? STATE_SCL : 0), pd->reg); -} - -static int simtec_i2c_getsda(void *pw) -{ - struct simtec_i2c_data *pd = pw; - return readb(pd->reg) & STATE_SDA ? 1 : 0; -} - -static int simtec_i2c_getscl(void *pw) -{ - struct simtec_i2c_data *pd = pw; - return readb(pd->reg) & STATE_SCL ? 1 : 0; -} - -/* device registration */ - -static int simtec_i2c_probe(struct platform_device *dev) -{ - struct simtec_i2c_data *pd; - struct resource *res; - int size; - int ret; - - pd = kzalloc(sizeof(struct simtec_i2c_data), GFP_KERNEL); - if (pd == NULL) { - dev_err(&dev->dev, "cannot allocate private data\n"); - return -ENOMEM; - } - - platform_set_drvdata(dev, pd); - - res = platform_get_resource(dev, IORESOURCE_MEM, 0); - if (res == NULL) { - dev_err(&dev->dev, "cannot find IO resource\n"); - ret = -ENOENT; - goto err; - } - - size = resource_size(res); - - pd->ioarea = request_mem_region(res->start, size, dev->name); - if (pd->ioarea == NULL) { - dev_err(&dev->dev, "cannot request IO\n"); - ret = -ENXIO; - goto err; - } - - pd->reg = ioremap(res->start, size); - if (pd->reg == NULL) { - dev_err(&dev->dev, "cannot map IO\n"); - ret = -ENXIO; - goto err_res; - } - - /* setup the private data */ - - pd->adap.owner = THIS_MODULE; - pd->adap.algo_data = &pd->bit; - pd->adap.dev.parent = &dev->dev; - - strlcpy(pd->adap.name, "Simtec I2C", sizeof(pd->adap.name)); - - pd->bit.data = pd; - pd->bit.setsda = simtec_i2c_setsda; - pd->bit.setscl = simtec_i2c_setscl; - pd->bit.getsda = simtec_i2c_getsda; - pd->bit.getscl = simtec_i2c_getscl; - pd->bit.timeout = HZ; - pd->bit.udelay = 20; - - ret = i2c_bit_add_bus(&pd->adap); - if (ret) - goto err_all; - - return 0; - - err_all: - iounmap(pd->reg); - - err_res: - release_resource(pd->ioarea); - kfree(pd->ioarea); - - err: - kfree(pd); - return ret; -} - -static int simtec_i2c_remove(struct platform_device *dev) -{ - struct simtec_i2c_data *pd = platform_get_drvdata(dev); - - i2c_del_adapter(&pd->adap); - - iounmap(pd->reg); - release_resource(pd->ioarea); - kfree(pd->ioarea); - kfree(pd); - - return 0; -} - -/* device driver */ - -static struct platform_driver simtec_i2c_driver = { - .driver = { - .name = "simtec-i2c", - .owner = THIS_MODULE, - }, - .probe = simtec_i2c_probe, - .remove = simtec_i2c_remove, -}; - -module_platform_driver(simtec_i2c_driver); - -MODULE_DESCRIPTION("Simtec Generic I2C Bus driver"); -MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>"); -MODULE_LICENSE("GPL"); -MODULE_ALIAS("platform:simtec-i2c"); |