Merge branch 'omap-pool'

[linux-2.6-omap-h63xx.git] / drivers / i2c / algos / i2c-algo-sgi.c

diff --git a/drivers/i2c/algos/i2c-algo-sgi.c b/drivers/i2c/algos/i2c-algo-sgi.c
deleted file mode 100644 (file)
index 6eaf145..0000000
--- a/drivers/i2c/algos/i2c-algo-sgi.c
+++ /dev/null
@@ -1,179 +0,0 @@
-/*
- * i2c-algo-sgi.c: i2c driver algorithm used by the VINO (SGI Indy) and
- * MACE (SGI O2) chips.
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License version 2 as published by the Free Software Foundation.
- *
- * Copyright (C) 2003 Ladislav Michl <ladis@linux-mips.org>
- */
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/errno.h>
-#include <linux/delay.h>
-
-#include <linux/i2c.h>
-#include <linux/i2c-algo-sgi.h>
-
-
-#define SGI_I2C_FORCE_IDLE     (0 << 0)
-#define SGI_I2C_NOT_IDLE       (1 << 0)
-#define SGI_I2C_WRITE          (0 << 1)
-#define SGI_I2C_READ           (1 << 1)
-#define SGI_I2C_RELEASE_BUS    (0 << 2)
-#define SGI_I2C_HOLD_BUS       (1 << 2)
-#define SGI_I2C_XFER_DONE      (0 << 4)
-#define SGI_I2C_XFER_BUSY      (1 << 4)
-#define SGI_I2C_ACK            (0 << 5)
-#define SGI_I2C_NACK           (1 << 5)
-#define SGI_I2C_BUS_OK         (0 << 7)
-#define SGI_I2C_BUS_ERR                (1 << 7)
-
-#define get_control()          adap->getctrl(adap->data)
-#define set_control(val)       adap->setctrl(adap->data, val)
-#define read_data()            adap->rdata(adap->data)
-#define write_data(val)                adap->wdata(adap->data, val)
-
-
-static int wait_xfer_done(struct i2c_algo_sgi_data *adap)
-{
-       int i;
-
-       for (i = 0; i < adap->xfer_timeout; i++) {
-               if ((get_control() & SGI_I2C_XFER_BUSY) == 0)
-                       return 0;
-               udelay(1);
-       }
-
-       return -ETIMEDOUT;
-}
-
-static int wait_ack(struct i2c_algo_sgi_data *adap)
-{
-       int i;
-
-       if (wait_xfer_done(adap))
-               return -ETIMEDOUT;
-       for (i = 0; i < adap->ack_timeout; i++) {
-               if ((get_control() & SGI_I2C_NACK) == 0)
-                       return 0;
-               udelay(1);
-       }
-
-       return -ETIMEDOUT;
-}
-
-static int force_idle(struct i2c_algo_sgi_data *adap)
-{
-       int i;
-
-       set_control(SGI_I2C_FORCE_IDLE);
-       for (i = 0; i < adap->xfer_timeout; i++) {
-               if ((get_control() & SGI_I2C_NOT_IDLE) == 0)
-                       goto out;
-               udelay(1);
-       }
-       return -ETIMEDOUT;
-out:
-       if (get_control() & SGI_I2C_BUS_ERR)
-               return -EIO;
-       return 0;
-}
-
-static int do_address(struct i2c_algo_sgi_data *adap, unsigned int addr,
-                     int rd)
-{
-       if (rd)
-               set_control(SGI_I2C_NOT_IDLE);
-       /* Check if bus is idle, eventually force it to do so */
-       if (get_control() & SGI_I2C_NOT_IDLE)
-               if (force_idle(adap))
-                       return -EIO;
-       /* Write out the i2c chip address and specify operation */
-       set_control(SGI_I2C_HOLD_BUS | SGI_I2C_WRITE | SGI_I2C_NOT_IDLE);
-       if (rd)
-               addr |= 1;
-       write_data(addr);
-       if (wait_ack(adap))
-               return -EIO;
-       return 0;
-}
-
-static int i2c_read(struct i2c_algo_sgi_data *adap, unsigned char *buf,
-                   unsigned int len)
-{
-       int i;
-
-       set_control(SGI_I2C_HOLD_BUS | SGI_I2C_READ | SGI_I2C_NOT_IDLE);
-       for (i = 0; i < len; i++) {
-               if (wait_xfer_done(adap))
-                       return -EIO;
-               buf[i] = read_data();
-       }
-       set_control(SGI_I2C_RELEASE_BUS | SGI_I2C_FORCE_IDLE);
-
-       return 0;
-
-}
-
-static int i2c_write(struct i2c_algo_sgi_data *adap, unsigned char *buf,
-                    unsigned int len)
-{
-       int i;
-
-       /* We are already in write state */
-       for (i = 0; i < len; i++) {
-               write_data(buf[i]);
-               if (wait_ack(adap))
-                       return -EIO;
-       }
-       return 0;
-}
-
-static int sgi_xfer(struct i2c_adapter *i2c_adap, struct i2c_msg *msgs,
-                   int num)
-{
-       struct i2c_algo_sgi_data *adap = i2c_adap->algo_data;
-       struct i2c_msg *p;
-       int i, err = 0;
-
-       for (i = 0; !err && i < num; i++) {
-               p = &msgs[i];
-               err = do_address(adap, p->addr, p->flags & I2C_M_RD);
-               if (err || !p->len)
-                       continue;
-               if (p->flags & I2C_M_RD)
-                       err = i2c_read(adap, p->buf, p->len);
-               else
-                       err = i2c_write(adap, p->buf, p->len);
-       }
-
-       return (err < 0) ? err : i;
-}
-
-static u32 sgi_func(struct i2c_adapter *adap)
-{
-       return I2C_FUNC_SMBUS_EMUL;
-}
-
-static const struct i2c_algorithm sgi_algo = {
-       .master_xfer    = sgi_xfer,
-       .functionality  = sgi_func,
-};
-
-/*
- * registering functions to load algorithms at runtime
- */
-int i2c_sgi_add_bus(struct i2c_adapter *adap)
-{
-       adap->algo = &sgi_algo;
-
-       return i2c_add_adapter(adap);
-}
-EXPORT_SYMBOL(i2c_sgi_add_bus);
-
-MODULE_AUTHOR("Ladislav Michl <ladis@linux-mips.org>");
-MODULE_DESCRIPTION("I2C-Bus SGI algorithm");
-MODULE_LICENSE("GPL");