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path: root/drivers/media/video/au0828/au0828-i2c.c
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Diffstat (limited to 'drivers/media/video/au0828/au0828-i2c.c')
-rw-r--r--drivers/media/video/au0828/au0828-i2c.c401
1 files changed, 0 insertions, 401 deletions
diff --git a/drivers/media/video/au0828/au0828-i2c.c b/drivers/media/video/au0828/au0828-i2c.c
deleted file mode 100644
index 4ded17fe1957..000000000000
--- a/drivers/media/video/au0828/au0828-i2c.c
+++ /dev/null
@@ -1,401 +0,0 @@
-/*
- * Driver for the Auvitek AU0828 USB bridge
- *
- * Copyright (c) 2008 Steven Toth <stoth@linuxtv.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.
- *
- * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/init.h>
-#include <linux/delay.h>
-#include <linux/io.h>
-
-#include "au0828.h"
-#include "media/tuner.h"
-#include <media/v4l2-common.h>
-
-static int i2c_scan;
-module_param(i2c_scan, int, 0444);
-MODULE_PARM_DESC(i2c_scan, "scan i2c bus at insmod time");
-
-#define I2C_WAIT_DELAY 25
-#define I2C_WAIT_RETRY 1000
-
-static inline int i2c_slave_did_write_ack(struct i2c_adapter *i2c_adap)
-{
- struct au0828_dev *dev = i2c_adap->algo_data;
- return au0828_read(dev, AU0828_I2C_STATUS_201) &
- AU0828_I2C_STATUS_NO_WRITE_ACK ? 0 : 1;
-}
-
-static inline int i2c_slave_did_read_ack(struct i2c_adapter *i2c_adap)
-{
- struct au0828_dev *dev = i2c_adap->algo_data;
- return au0828_read(dev, AU0828_I2C_STATUS_201) &
- AU0828_I2C_STATUS_NO_READ_ACK ? 0 : 1;
-}
-
-static int i2c_wait_read_ack(struct i2c_adapter *i2c_adap)
-{
- int count;
-
- for (count = 0; count < I2C_WAIT_RETRY; count++) {
- if (!i2c_slave_did_read_ack(i2c_adap))
- break;
- udelay(I2C_WAIT_DELAY);
- }
-
- if (I2C_WAIT_RETRY == count)
- return 0;
-
- return 1;
-}
-
-static inline int i2c_is_read_busy(struct i2c_adapter *i2c_adap)
-{
- struct au0828_dev *dev = i2c_adap->algo_data;
- return au0828_read(dev, AU0828_I2C_STATUS_201) &
- AU0828_I2C_STATUS_READ_DONE ? 0 : 1;
-}
-
-static int i2c_wait_read_done(struct i2c_adapter *i2c_adap)
-{
- int count;
-
- for (count = 0; count < I2C_WAIT_RETRY; count++) {
- if (!i2c_is_read_busy(i2c_adap))
- break;
- udelay(I2C_WAIT_DELAY);
- }
-
- if (I2C_WAIT_RETRY == count)
- return 0;
-
- return 1;
-}
-
-static inline int i2c_is_write_done(struct i2c_adapter *i2c_adap)
-{
- struct au0828_dev *dev = i2c_adap->algo_data;
- return au0828_read(dev, AU0828_I2C_STATUS_201) &
- AU0828_I2C_STATUS_WRITE_DONE ? 1 : 0;
-}
-
-static int i2c_wait_write_done(struct i2c_adapter *i2c_adap)
-{
- int count;
-
- for (count = 0; count < I2C_WAIT_RETRY; count++) {
- if (i2c_is_write_done(i2c_adap))
- break;
- udelay(I2C_WAIT_DELAY);
- }
-
- if (I2C_WAIT_RETRY == count)
- return 0;
-
- return 1;
-}
-
-static inline int i2c_is_busy(struct i2c_adapter *i2c_adap)
-{
- struct au0828_dev *dev = i2c_adap->algo_data;
- return au0828_read(dev, AU0828_I2C_STATUS_201) &
- AU0828_I2C_STATUS_BUSY ? 1 : 0;
-}
-
-static int i2c_wait_done(struct i2c_adapter *i2c_adap)
-{
- int count;
-
- for (count = 0; count < I2C_WAIT_RETRY; count++) {
- if (!i2c_is_busy(i2c_adap))
- break;
- udelay(I2C_WAIT_DELAY);
- }
-
- if (I2C_WAIT_RETRY == count)
- return 0;
-
- return 1;
-}
-
-/* FIXME: Implement join handling correctly */
-static int i2c_sendbytes(struct i2c_adapter *i2c_adap,
- const struct i2c_msg *msg, int joined_rlen)
-{
- int i, strobe = 0;
- struct au0828_dev *dev = i2c_adap->algo_data;
-
- dprintk(4, "%s()\n", __func__);
-
- au0828_write(dev, AU0828_I2C_MULTIBYTE_MODE_2FF, 0x01);
-
- /* Set the I2C clock */
- if (((dev->board.tuner_type == TUNER_XC5000) ||
- (dev->board.tuner_type == TUNER_XC5000C)) &&
- (dev->board.tuner_addr == msg->addr) &&
- (msg->len == 64)) {
- /* Hack to speed up firmware load. The xc5000 lets us do up
- to 400 KHz when in firmware download mode */
- au0828_write(dev, AU0828_I2C_CLK_DIVIDER_202,
- AU0828_I2C_CLK_250KHZ);
- } else {
- /* Use the i2c clock speed in the board configuration */
- au0828_write(dev, AU0828_I2C_CLK_DIVIDER_202,
- dev->board.i2c_clk_divider);
- }
-
- /* Hardware needs 8 bit addresses */
- au0828_write(dev, AU0828_I2C_DEST_ADDR_203, msg->addr << 1);
-
- dprintk(4, "SEND: %02x\n", msg->addr);
-
- /* Deal with i2c_scan */
- if (msg->len == 0) {
- /* The analog tuner detection code makes use of the SMBUS_QUICK
- message (which involves a zero length i2c write). To avoid
- checking the status register when we didn't strobe out any
- actual bytes to the bus, just do a read check. This is
- consistent with how I saw i2c device checking done in the
- USB trace of the Windows driver */
- au0828_write(dev, AU0828_I2C_TRIGGER_200,
- AU0828_I2C_TRIGGER_READ);
-
- if (!i2c_wait_done(i2c_adap))
- return -EIO;
-
- if (i2c_wait_read_ack(i2c_adap))
- return -EIO;
-
- return 0;
- }
-
- for (i = 0; i < msg->len;) {
-
- dprintk(4, " %02x\n", msg->buf[i]);
-
- au0828_write(dev, AU0828_I2C_WRITE_FIFO_205, msg->buf[i]);
-
- strobe++;
- i++;
-
- if ((strobe >= 4) || (i >= msg->len)) {
-
- /* Strobe the byte into the bus */
- if (i < msg->len)
- au0828_write(dev, AU0828_I2C_TRIGGER_200,
- AU0828_I2C_TRIGGER_WRITE |
- AU0828_I2C_TRIGGER_HOLD);
- else
- au0828_write(dev, AU0828_I2C_TRIGGER_200,
- AU0828_I2C_TRIGGER_WRITE);
-
- /* Reset strobe trigger */
- strobe = 0;
-
- if (!i2c_wait_write_done(i2c_adap))
- return -EIO;
-
- }
-
- }
- if (!i2c_wait_done(i2c_adap))
- return -EIO;
-
- dprintk(4, "\n");
-
- return msg->len;
-}
-
-/* FIXME: Implement join handling correctly */
-static int i2c_readbytes(struct i2c_adapter *i2c_adap,
- const struct i2c_msg *msg, int joined)
-{
- struct au0828_dev *dev = i2c_adap->algo_data;
- int i;
-
- dprintk(4, "%s()\n", __func__);
-
- au0828_write(dev, AU0828_I2C_MULTIBYTE_MODE_2FF, 0x01);
-
- /* Set the I2C clock */
- au0828_write(dev, AU0828_I2C_CLK_DIVIDER_202,
- dev->board.i2c_clk_divider);
-
- /* Hardware needs 8 bit addresses */
- au0828_write(dev, AU0828_I2C_DEST_ADDR_203, msg->addr << 1);
-
- dprintk(4, " RECV:\n");
-
- /* Deal with i2c_scan */
- if (msg->len == 0) {
- au0828_write(dev, AU0828_I2C_TRIGGER_200,
- AU0828_I2C_TRIGGER_READ);
-
- if (i2c_wait_read_ack(i2c_adap))
- return -EIO;
- return 0;
- }
-
- for (i = 0; i < msg->len;) {
-
- i++;
-
- if (i < msg->len)
- au0828_write(dev, AU0828_I2C_TRIGGER_200,
- AU0828_I2C_TRIGGER_READ |
- AU0828_I2C_TRIGGER_HOLD);
- else
- au0828_write(dev, AU0828_I2C_TRIGGER_200,
- AU0828_I2C_TRIGGER_READ);
-
- if (!i2c_wait_read_done(i2c_adap))
- return -EIO;
-
- msg->buf[i-1] = au0828_read(dev, AU0828_I2C_READ_FIFO_209) &
- 0xff;
-
- dprintk(4, " %02x\n", msg->buf[i-1]);
- }
- if (!i2c_wait_done(i2c_adap))
- return -EIO;
-
- dprintk(4, "\n");
-
- return msg->len;
-}
-
-static int i2c_xfer(struct i2c_adapter *i2c_adap,
- struct i2c_msg *msgs, int num)
-{
- int i, retval = 0;
-
- dprintk(4, "%s(num = %d)\n", __func__, num);
-
- for (i = 0; i < num; i++) {
- dprintk(4, "%s(num = %d) addr = 0x%02x len = 0x%x\n",
- __func__, num, msgs[i].addr, msgs[i].len);
- if (msgs[i].flags & I2C_M_RD) {
- /* read */
- retval = i2c_readbytes(i2c_adap, &msgs[i], 0);
- } else if (i + 1 < num && (msgs[i + 1].flags & I2C_M_RD) &&
- msgs[i].addr == msgs[i + 1].addr) {
- /* write then read from same address */
- retval = i2c_sendbytes(i2c_adap, &msgs[i],
- msgs[i + 1].len);
- if (retval < 0)
- goto err;
- i++;
- retval = i2c_readbytes(i2c_adap, &msgs[i], 1);
- } else {
- /* write */
- retval = i2c_sendbytes(i2c_adap, &msgs[i], 0);
- }
- if (retval < 0)
- goto err;
- }
- return num;
-
-err:
- return retval;
-}
-
-static u32 au0828_functionality(struct i2c_adapter *adap)
-{
- return I2C_FUNC_SMBUS_EMUL | I2C_FUNC_I2C;
-}
-
-static struct i2c_algorithm au0828_i2c_algo_template = {
- .master_xfer = i2c_xfer,
- .functionality = au0828_functionality,
-};
-
-/* ----------------------------------------------------------------------- */
-
-static struct i2c_adapter au0828_i2c_adap_template = {
- .name = DRIVER_NAME,
- .owner = THIS_MODULE,
- .algo = &au0828_i2c_algo_template,
-};
-
-static struct i2c_client au0828_i2c_client_template = {
- .name = "au0828 internal",
-};
-
-static char *i2c_devs[128] = {
- [0x8e >> 1] = "au8522",
- [0xa0 >> 1] = "eeprom",
- [0xc2 >> 1] = "tuner/xc5000",
-};
-
-static void do_i2c_scan(char *name, struct i2c_client *c)
-{
- unsigned char buf;
- int i, rc;
-
- for (i = 0; i < 128; i++) {
- c->addr = i;
- rc = i2c_master_recv(c, &buf, 0);
- if (rc < 0)
- continue;
- printk(KERN_INFO "%s: i2c scan: found device @ 0x%x [%s]\n",
- name, i << 1, i2c_devs[i] ? i2c_devs[i] : "???");
- }
-}
-
-/* init + register i2c adapter */
-int au0828_i2c_register(struct au0828_dev *dev)
-{
- dprintk(1, "%s()\n", __func__);
-
- memcpy(&dev->i2c_adap, &au0828_i2c_adap_template,
- sizeof(dev->i2c_adap));
- memcpy(&dev->i2c_algo, &au0828_i2c_algo_template,
- sizeof(dev->i2c_algo));
- memcpy(&dev->i2c_client, &au0828_i2c_client_template,
- sizeof(dev->i2c_client));
-
- dev->i2c_adap.dev.parent = &dev->usbdev->dev;
-
- strlcpy(dev->i2c_adap.name, DRIVER_NAME,
- sizeof(dev->i2c_adap.name));
-
- dev->i2c_adap.algo = &dev->i2c_algo;
- dev->i2c_adap.algo_data = dev;
- i2c_set_adapdata(&dev->i2c_adap, &dev->v4l2_dev);
- i2c_add_adapter(&dev->i2c_adap);
-
- dev->i2c_client.adapter = &dev->i2c_adap;
-
- if (0 == dev->i2c_rc) {
- printk(KERN_INFO "%s: i2c bus registered\n", DRIVER_NAME);
- if (i2c_scan)
- do_i2c_scan(DRIVER_NAME, &dev->i2c_client);
- } else
- printk(KERN_INFO "%s: i2c bus register FAILED\n", DRIVER_NAME);
-
- return dev->i2c_rc;
-}
-
-int au0828_i2c_unregister(struct au0828_dev *dev)
-{
- i2c_del_adapter(&dev->i2c_adap);
- return 0;
-}
-
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