summaryrefslogtreecommitdiffstats
path: root/drivers/media/video/stk1160/stk1160-i2c.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/media/video/stk1160/stk1160-i2c.c')
-rw-r--r--drivers/media/video/stk1160/stk1160-i2c.c294
1 files changed, 0 insertions, 294 deletions
diff --git a/drivers/media/video/stk1160/stk1160-i2c.c b/drivers/media/video/stk1160/stk1160-i2c.c
deleted file mode 100644
index 176ac937306b..000000000000
--- a/drivers/media/video/stk1160/stk1160-i2c.c
+++ /dev/null
@@ -1,294 +0,0 @@
-/*
- * STK1160 driver
- *
- * Copyright (C) 2012 Ezequiel Garcia
- * <elezegarcia--a.t--gmail.com>
- *
- * Based on Easycap driver by R.M. Thomas
- * Copyright (C) 2010 R.M. Thomas
- * <rmthomas--a.t--sciolus.org>
- *
- * 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.
- *
- */
-
-#include <linux/module.h>
-#include <linux/usb.h>
-#include <linux/i2c.h>
-
-#include "stk1160.h"
-#include "stk1160-reg.h"
-
-static unsigned int i2c_debug;
-module_param(i2c_debug, int, 0644);
-MODULE_PARM_DESC(i2c_debug, "enable debug messages [i2c]");
-
-#define dprintk_i2c(fmt, args...) \
-do { \
- if (i2c_debug) \
- printk(KERN_DEBUG fmt, ##args); \
-} while (0)
-
-static int stk1160_i2c_busy_wait(struct stk1160 *dev, u8 wait_bit_mask)
-{
- unsigned long end;
- u8 flag;
-
- /* Wait until read/write finish bit is set */
- end = jiffies + msecs_to_jiffies(STK1160_I2C_TIMEOUT);
- while (time_is_after_jiffies(end)) {
-
- stk1160_read_reg(dev, STK1160_SICTL+1, &flag);
- /* read/write done? */
- if (flag & wait_bit_mask)
- goto done;
-
- usleep_range(10 * USEC_PER_MSEC, 20 * USEC_PER_MSEC);
- }
-
- return -ETIMEDOUT;
-
-done:
- return 0;
-}
-
-static int stk1160_i2c_write_reg(struct stk1160 *dev, u8 addr,
- u8 reg, u8 value)
-{
- int rc;
-
- /* Set serial device address */
- rc = stk1160_write_reg(dev, STK1160_SICTL_SDA, addr);
- if (rc < 0)
- return rc;
-
- /* Set i2c device register sub-address */
- rc = stk1160_write_reg(dev, STK1160_SBUSW_WA, reg);
- if (rc < 0)
- return rc;
-
- /* Set i2c device register value */
- rc = stk1160_write_reg(dev, STK1160_SBUSW_WD, value);
- if (rc < 0)
- return rc;
-
- /* Start write now */
- rc = stk1160_write_reg(dev, STK1160_SICTL, 0x01);
- if (rc < 0)
- return rc;
-
- rc = stk1160_i2c_busy_wait(dev, 0x04);
- if (rc < 0)
- return rc;
-
- return 0;
-}
-
-static int stk1160_i2c_read_reg(struct stk1160 *dev, u8 addr,
- u8 reg, u8 *value)
-{
- int rc;
-
- /* Set serial device address */
- rc = stk1160_write_reg(dev, STK1160_SICTL_SDA, addr);
- if (rc < 0)
- return rc;
-
- /* Set i2c device register sub-address */
- rc = stk1160_write_reg(dev, STK1160_SBUSR_RA, reg);
- if (rc < 0)
- return rc;
-
- /* Start read now */
- rc = stk1160_write_reg(dev, STK1160_SICTL, 0x20);
- if (rc < 0)
- return rc;
-
- rc = stk1160_i2c_busy_wait(dev, 0x01);
- if (rc < 0)
- return rc;
-
- stk1160_read_reg(dev, STK1160_SBUSR_RD, value);
- if (rc < 0)
- return rc;
-
- return 0;
-}
-
-/*
- * stk1160_i2c_check_for_device()
- * check if there is a i2c_device at the supplied address
- */
-static int stk1160_i2c_check_for_device(struct stk1160 *dev,
- unsigned char addr)
-{
- int rc;
-
- /* Set serial device address */
- rc = stk1160_write_reg(dev, STK1160_SICTL_SDA, addr);
- if (rc < 0)
- return rc;
-
- /* Set device sub-address, we'll chip version reg */
- rc = stk1160_write_reg(dev, STK1160_SBUSR_RA, 0x00);
- if (rc < 0)
- return rc;
-
- /* Start read now */
- rc = stk1160_write_reg(dev, STK1160_SICTL, 0x20);
- if (rc < 0)
- return rc;
-
- rc = stk1160_i2c_busy_wait(dev, 0x01);
- if (rc < 0)
- return -ENODEV;
-
- return 0;
-}
-
-/*
- * stk1160_i2c_xfer()
- * the main i2c transfer function
- */
-static int stk1160_i2c_xfer(struct i2c_adapter *i2c_adap,
- struct i2c_msg msgs[], int num)
-{
- struct stk1160 *dev = i2c_adap->algo_data;
- int addr, rc, i;
-
- for (i = 0; i < num; i++) {
- addr = msgs[i].addr << 1;
- dprintk_i2c("%s: addr=%x", __func__, addr);
-
- if (!msgs[i].len) {
- /* no len: check only for device presence */
- rc = stk1160_i2c_check_for_device(dev, addr);
- if (rc < 0) {
- dprintk_i2c(" no device\n");
- return rc;
- }
-
- } else if (msgs[i].flags & I2C_M_RD) {
- /* read request without preceding register selection */
- dprintk_i2c(" subaddr not selected");
- rc = -EOPNOTSUPP;
- goto err;
-
- } else if (i + 1 < num && msgs[i].len <= 2 &&
- (msgs[i + 1].flags & I2C_M_RD) &&
- msgs[i].addr == msgs[i + 1].addr) {
-
- if (msgs[i].len != 1 || msgs[i + 1].len != 1) {
- dprintk_i2c(" len not supported");
- rc = -EOPNOTSUPP;
- goto err;
- }
-
- dprintk_i2c(" subaddr=%x", msgs[i].buf[0]);
-
- rc = stk1160_i2c_read_reg(dev, addr, msgs[i].buf[0],
- msgs[i + 1].buf);
-
- dprintk_i2c(" read=%x", *msgs[i + 1].buf);
-
- /* consumed two msgs, so we skip one of them */
- i++;
-
- } else {
- if (msgs[i].len != 2) {
- dprintk_i2c(" len not supported");
- rc = -EOPNOTSUPP;
- goto err;
- }
-
- dprintk_i2c(" subaddr=%x write=%x",
- msgs[i].buf[0], msgs[i].buf[1]);
-
- rc = stk1160_i2c_write_reg(dev, addr, msgs[i].buf[0],
- msgs[i].buf[1]);
- }
-
- if (rc < 0)
- goto err;
- dprintk_i2c(" OK\n");
- }
-
- return num;
-err:
- dprintk_i2c(" ERROR: %d\n", rc);
- return num;
-}
-
-/*
- * functionality(), what da heck is this?
- */
-static u32 functionality(struct i2c_adapter *adap)
-{
- return I2C_FUNC_SMBUS_EMUL;
-}
-
-static struct i2c_algorithm algo = {
- .master_xfer = stk1160_i2c_xfer,
- .functionality = functionality,
-};
-
-static struct i2c_adapter adap_template = {
- .owner = THIS_MODULE,
- .name = "stk1160",
- .algo = &algo,
-};
-
-static struct i2c_client client_template = {
- .name = "stk1160 internal",
-};
-
-/*
- * stk1160_i2c_register()
- * register i2c bus
- */
-int stk1160_i2c_register(struct stk1160 *dev)
-{
- int rc;
-
- dev->i2c_adap = adap_template;
- dev->i2c_adap.dev.parent = dev->dev;
- strcpy(dev->i2c_adap.name, "stk1160");
- dev->i2c_adap.algo_data = dev;
-
- i2c_set_adapdata(&dev->i2c_adap, &dev->v4l2_dev);
-
- rc = i2c_add_adapter(&dev->i2c_adap);
- if (rc < 0) {
- stk1160_err("cannot add i2c adapter (%d)\n", rc);
- return rc;
- }
-
- dev->i2c_client = client_template;
- dev->i2c_client.adapter = &dev->i2c_adap;
-
- /* Set i2c clock divider device address */
- stk1160_write_reg(dev, STK1160_SICTL_CD, 0x0f);
-
- /* ??? */
- stk1160_write_reg(dev, STK1160_ASIC + 3, 0x00);
-
- return 0;
-}
-
-/*
- * stk1160_i2c_unregister()
- * unregister i2c_bus
- */
-int stk1160_i2c_unregister(struct stk1160 *dev)
-{
- i2c_del_adapter(&dev->i2c_adap);
- return 0;
-}
generated by cgit v1.2.3 (git 2.39.1) at 2025-01-26 19:47:06 +0100