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path: root/drivers/media/video/cx231xx/cx231xx-i2c.c
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Diffstat (limited to 'drivers/media/video/cx231xx/cx231xx-i2c.c')
-rw-r--r--drivers/media/video/cx231xx/cx231xx-i2c.c532
1 files changed, 0 insertions, 532 deletions
diff --git a/drivers/media/video/cx231xx/cx231xx-i2c.c b/drivers/media/video/cx231xx/cx231xx-i2c.c
deleted file mode 100644
index 781feed406f7..000000000000
--- a/drivers/media/video/cx231xx/cx231xx-i2c.c
+++ /dev/null
@@ -1,532 +0,0 @@
-/*
- cx231xx-i2c.c - driver for Conexant Cx23100/101/102 USB video capture devices
-
- Copyright (C) 2008 <srinivasa.deevi at conexant dot com>
- Based on em28xx driver
- Based on Cx23885 driver
-
- 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/kernel.h>
-#include <linux/usb.h>
-#include <linux/i2c.h>
-#include <media/v4l2-common.h>
-#include <media/tuner.h>
-
-#include "cx231xx.h"
-
-/* ----------------------------------------------------------- */
-
-static unsigned int i2c_scan;
-module_param(i2c_scan, int, 0444);
-MODULE_PARM_DESC(i2c_scan, "scan i2c bus at insmod time");
-
-static unsigned int i2c_debug;
-module_param(i2c_debug, int, 0644);
-MODULE_PARM_DESC(i2c_debug, "enable debug messages [i2c]");
-
-#define dprintk1(lvl, fmt, args...) \
-do { \
- if (i2c_debug >= lvl) { \
- printk(fmt, ##args); \
- } \
-} while (0)
-
-#define dprintk2(lvl, fmt, args...) \
-do { \
- if (i2c_debug >= lvl) { \
- printk(KERN_DEBUG "%s at %s: " fmt, \
- dev->name, __func__ , ##args); \
- } \
-} while (0)
-
-static inline bool is_tuner(struct cx231xx *dev, struct cx231xx_i2c *bus,
- const struct i2c_msg *msg, int tuner_type)
-{
- if (bus->nr != dev->board.tuner_i2c_master)
- return false;
-
- if (msg->addr != dev->board.tuner_addr)
- return false;
-
- if (dev->tuner_type != tuner_type)
- return false;
-
- return true;
-}
-
-/*
- * cx231xx_i2c_send_bytes()
- */
-int cx231xx_i2c_send_bytes(struct i2c_adapter *i2c_adap,
- const struct i2c_msg *msg)
-{
- struct cx231xx_i2c *bus = i2c_adap->algo_data;
- struct cx231xx *dev = bus->dev;
- struct cx231xx_i2c_xfer_data req_data;
- int status = 0;
- u16 size = 0;
- u8 loop = 0;
- u8 saddr_len = 1;
- u8 *buf_ptr = NULL;
- u16 saddr = 0;
- u8 need_gpio = 0;
-
- if (is_tuner(dev, bus, msg, TUNER_XC5000)) {
- size = msg->len;
-
- if (size == 2) { /* register write sub addr */
- /* Just writing sub address will cause problem
- * to XC5000. So ignore the request */
- return 0;
- } else if (size == 4) { /* register write with sub addr */
- if (msg->len >= 2)
- saddr = msg->buf[0] << 8 | msg->buf[1];
- else if (msg->len == 1)
- saddr = msg->buf[0];
-
- switch (saddr) {
- case 0x0000: /* start tuner calibration mode */
- need_gpio = 1;
- /* FW Loading is done */
- dev->xc_fw_load_done = 1;
- break;
- case 0x000D: /* Set signal source */
- case 0x0001: /* Set TV standard - Video */
- case 0x0002: /* Set TV standard - Audio */
- case 0x0003: /* Set RF Frequency */
- need_gpio = 1;
- break;
- default:
- if (dev->xc_fw_load_done)
- need_gpio = 1;
- break;
- }
-
- if (need_gpio) {
- dprintk1(1,
- "GPIO WRITE: addr 0x%x, len %d, saddr 0x%x\n",
- msg->addr, msg->len, saddr);
-
- return dev->cx231xx_gpio_i2c_write(dev,
- msg->addr,
- msg->buf,
- msg->len);
- }
- }
-
- /* special case for Xc5000 tuner case */
- saddr_len = 1;
-
- /* adjust the length to correct length */
- size -= saddr_len;
- buf_ptr = (u8 *) (msg->buf + 1);
-
- do {
- /* prepare xfer_data struct */
- req_data.dev_addr = msg->addr;
- req_data.direction = msg->flags;
- req_data.saddr_len = saddr_len;
- req_data.saddr_dat = msg->buf[0];
- req_data.buf_size = size > 16 ? 16 : size;
- req_data.p_buffer = (u8 *) (buf_ptr + loop * 16);
-
- bus->i2c_nostop = (size > 16) ? 1 : 0;
- bus->i2c_reserve = (loop == 0) ? 0 : 1;
-
- /* usb send command */
- status = dev->cx231xx_send_usb_command(bus, &req_data);
- loop++;
-
- if (size >= 16)
- size -= 16;
- else
- size = 0;
-
- } while (size > 0);
-
- bus->i2c_nostop = 0;
- bus->i2c_reserve = 0;
-
- } else { /* regular case */
-
- /* prepare xfer_data struct */
- req_data.dev_addr = msg->addr;
- req_data.direction = msg->flags;
- req_data.saddr_len = 0;
- req_data.saddr_dat = 0;
- req_data.buf_size = msg->len;
- req_data.p_buffer = msg->buf;
-
- /* usb send command */
- status = dev->cx231xx_send_usb_command(bus, &req_data);
- }
-
- return status < 0 ? status : 0;
-}
-
-/*
- * cx231xx_i2c_recv_bytes()
- * read a byte from the i2c device
- */
-static int cx231xx_i2c_recv_bytes(struct i2c_adapter *i2c_adap,
- const struct i2c_msg *msg)
-{
- struct cx231xx_i2c *bus = i2c_adap->algo_data;
- struct cx231xx *dev = bus->dev;
- struct cx231xx_i2c_xfer_data req_data;
- int status = 0;
- u16 saddr = 0;
- u8 need_gpio = 0;
-
- if (is_tuner(dev, bus, msg, TUNER_XC5000)) {
- if (msg->len == 2)
- saddr = msg->buf[0] << 8 | msg->buf[1];
- else if (msg->len == 1)
- saddr = msg->buf[0];
-
- if (dev->xc_fw_load_done) {
-
- switch (saddr) {
- case 0x0009: /* BUSY check */
- dprintk1(1,
- "GPIO R E A D: Special case BUSY check \n");
- /*Try read BUSY register, just set it to zero*/
- msg->buf[0] = 0;
- if (msg->len == 2)
- msg->buf[1] = 0;
- return 0;
- case 0x0004: /* read Lock status */
- need_gpio = 1;
- break;
-
- }
-
- if (need_gpio) {
- /* this is a special case to handle Xceive tuner
- clock stretch issue with gpio based I2C */
-
- dprintk1(1,
- "GPIO R E A D: addr 0x%x, len %d, saddr 0x%x\n",
- msg->addr, msg->len,
- msg->buf[0] << 8 | msg->buf[1]);
-
- status =
- dev->cx231xx_gpio_i2c_write(dev, msg->addr,
- msg->buf,
- msg->len);
- status =
- dev->cx231xx_gpio_i2c_read(dev, msg->addr,
- msg->buf,
- msg->len);
- return status;
- }
- }
-
- /* prepare xfer_data struct */
- req_data.dev_addr = msg->addr;
- req_data.direction = msg->flags;
- req_data.saddr_len = msg->len;
- req_data.saddr_dat = msg->buf[0] << 8 | msg->buf[1];
- req_data.buf_size = msg->len;
- req_data.p_buffer = msg->buf;
-
- /* usb send command */
- status = dev->cx231xx_send_usb_command(bus, &req_data);
-
- } else {
-
- /* prepare xfer_data struct */
- req_data.dev_addr = msg->addr;
- req_data.direction = msg->flags;
- req_data.saddr_len = 0;
- req_data.saddr_dat = 0;
- req_data.buf_size = msg->len;
- req_data.p_buffer = msg->buf;
-
- /* usb send command */
- status = dev->cx231xx_send_usb_command(bus, &req_data);
- }
-
- return status < 0 ? status : 0;
-}
-
-/*
- * cx231xx_i2c_recv_bytes_with_saddr()
- * read a byte from the i2c device
- */
-static int cx231xx_i2c_recv_bytes_with_saddr(struct i2c_adapter *i2c_adap,
- const struct i2c_msg *msg1,
- const struct i2c_msg *msg2)
-{
- struct cx231xx_i2c *bus = i2c_adap->algo_data;
- struct cx231xx *dev = bus->dev;
- struct cx231xx_i2c_xfer_data req_data;
- int status = 0;
- u16 saddr = 0;
- u8 need_gpio = 0;
-
- if (msg1->len == 2)
- saddr = msg1->buf[0] << 8 | msg1->buf[1];
- else if (msg1->len == 1)
- saddr = msg1->buf[0];
-
- if (is_tuner(dev, bus, msg2, TUNER_XC5000)) {
- if ((msg2->len < 16)) {
-
- dprintk1(1,
- "i2c_read: addr 0x%x, len %d, saddr 0x%x, len %d\n",
- msg2->addr, msg2->len, saddr, msg1->len);
-
- switch (saddr) {
- case 0x0008: /* read FW load status */
- need_gpio = 1;
- break;
- case 0x0004: /* read Lock status */
- need_gpio = 1;
- break;
- }
-
- if (need_gpio) {
- status =
- dev->cx231xx_gpio_i2c_write(dev, msg1->addr,
- msg1->buf,
- msg1->len);
- status =
- dev->cx231xx_gpio_i2c_read(dev, msg2->addr,
- msg2->buf,
- msg2->len);
- return status;
- }
- }
- }
-
- /* prepare xfer_data struct */
- req_data.dev_addr = msg2->addr;
- req_data.direction = msg2->flags;
- req_data.saddr_len = msg1->len;
- req_data.saddr_dat = saddr;
- req_data.buf_size = msg2->len;
- req_data.p_buffer = msg2->buf;
-
- /* usb send command */
- status = dev->cx231xx_send_usb_command(bus, &req_data);
-
- return status < 0 ? status : 0;
-}
-
-/*
- * cx231xx_i2c_check_for_device()
- * check if there is a i2c_device at the supplied address
- */
-static int cx231xx_i2c_check_for_device(struct i2c_adapter *i2c_adap,
- const struct i2c_msg *msg)
-{
- struct cx231xx_i2c *bus = i2c_adap->algo_data;
- struct cx231xx *dev = bus->dev;
- struct cx231xx_i2c_xfer_data req_data;
- int status = 0;
-
- /* prepare xfer_data struct */
- req_data.dev_addr = msg->addr;
- req_data.direction = msg->flags;
- req_data.saddr_len = 0;
- req_data.saddr_dat = 0;
- req_data.buf_size = 0;
- req_data.p_buffer = NULL;
-
- /* usb send command */
- status = dev->cx231xx_send_usb_command(bus, &req_data);
-
- return status < 0 ? status : 0;
-}
-
-/*
- * cx231xx_i2c_xfer()
- * the main i2c transfer function
- */
-static int cx231xx_i2c_xfer(struct i2c_adapter *i2c_adap,
- struct i2c_msg msgs[], int num)
-{
- struct cx231xx_i2c *bus = i2c_adap->algo_data;
- struct cx231xx *dev = bus->dev;
- int addr, rc, i, byte;
-
- if (num <= 0)
- return 0;
- mutex_lock(&dev->i2c_lock);
- for (i = 0; i < num; i++) {
-
- addr = msgs[i].addr >> 1;
-
- dprintk2(2, "%s %s addr=%x len=%d:",
- (msgs[i].flags & I2C_M_RD) ? "read" : "write",
- i == num - 1 ? "stop" : "nonstop", addr, msgs[i].len);
- if (!msgs[i].len) {
- /* no len: check only for device presence */
- rc = cx231xx_i2c_check_for_device(i2c_adap, &msgs[i]);
- if (rc < 0) {
- dprintk2(2, " no device\n");
- mutex_unlock(&dev->i2c_lock);
- return rc;
- }
-
- } else if (msgs[i].flags & I2C_M_RD) {
- /* read bytes */
- rc = cx231xx_i2c_recv_bytes(i2c_adap, &msgs[i]);
- if (i2c_debug >= 2) {
- for (byte = 0; byte < msgs[i].len; byte++)
- printk(" %02x", msgs[i].buf[byte]);
- }
- } else if (i + 1 < num && (msgs[i + 1].flags & I2C_M_RD) &&
- msgs[i].addr == msgs[i + 1].addr
- && (msgs[i].len <= 2) && (bus->nr < 3)) {
- /* read bytes */
- rc = cx231xx_i2c_recv_bytes_with_saddr(i2c_adap,
- &msgs[i],
- &msgs[i + 1]);
- if (i2c_debug >= 2) {
- for (byte = 0; byte < msgs[i].len; byte++)
- printk(" %02x", msgs[i].buf[byte]);
- }
- i++;
- } else {
- /* write bytes */
- if (i2c_debug >= 2) {
- for (byte = 0; byte < msgs[i].len; byte++)
- printk(" %02x", msgs[i].buf[byte]);
- }
- rc = cx231xx_i2c_send_bytes(i2c_adap, &msgs[i]);
- }
- if (rc < 0)
- goto err;
- if (i2c_debug >= 2)
- printk("\n");
- }
- mutex_unlock(&dev->i2c_lock);
- return num;
-err:
- dprintk2(2, " ERROR: %i\n", rc);
- mutex_unlock(&dev->i2c_lock);
- return rc;
-}
-
-/* ----------------------------------------------------------- */
-
-/*
- * functionality()
- */
-static u32 functionality(struct i2c_adapter *adap)
-{
- return I2C_FUNC_SMBUS_EMUL | I2C_FUNC_I2C;
-}
-
-static struct i2c_algorithm cx231xx_algo = {
- .master_xfer = cx231xx_i2c_xfer,
- .functionality = functionality,
-};
-
-static struct i2c_adapter cx231xx_adap_template = {
- .owner = THIS_MODULE,
- .name = "cx231xx",
- .algo = &cx231xx_algo,
-};
-
-static struct i2c_client cx231xx_client_template = {
- .name = "cx231xx internal",
-};
-
-/* ----------------------------------------------------------- */
-
-/*
- * i2c_devs
- * incomplete list of known devices
- */
-static char *i2c_devs[128] = {
- [0x60 >> 1] = "colibri",
- [0x88 >> 1] = "hammerhead",
- [0x8e >> 1] = "CIR",
- [0x32 >> 1] = "GeminiIII",
- [0x02 >> 1] = "Aquarius",
- [0xa0 >> 1] = "eeprom",
- [0xc0 >> 1] = "tuner",
- [0xc2 >> 1] = "tuner",
-};
-
-/*
- * cx231xx_do_i2c_scan()
- * check i2c address range for devices
- */
-void cx231xx_do_i2c_scan(struct cx231xx *dev, struct i2c_client *c)
-{
- unsigned char buf;
- int i, rc;
-
- cx231xx_info(": Checking for I2C devices ..\n");
- for (i = 0; i < 128; i++) {
- c->addr = i;
- rc = i2c_master_recv(c, &buf, 0);
- if (rc < 0)
- continue;
- cx231xx_info("%s: i2c scan: found device @ 0x%x [%s]\n",
- dev->name, i << 1,
- i2c_devs[i] ? i2c_devs[i] : "???");
- }
- cx231xx_info(": Completed Checking for I2C devices.\n");
-}
-
-/*
- * cx231xx_i2c_register()
- * register i2c bus
- */
-int cx231xx_i2c_register(struct cx231xx_i2c *bus)
-{
- struct cx231xx *dev = bus->dev;
-
- BUG_ON(!dev->cx231xx_send_usb_command);
-
- bus->i2c_adap = cx231xx_adap_template;
- bus->i2c_client = cx231xx_client_template;
- bus->i2c_adap.dev.parent = &dev->udev->dev;
-
- strlcpy(bus->i2c_adap.name, bus->dev->name, sizeof(bus->i2c_adap.name));
-
- bus->i2c_adap.algo_data = bus;
- i2c_set_adapdata(&bus->i2c_adap, &dev->v4l2_dev);
- i2c_add_adapter(&bus->i2c_adap);
-
- bus->i2c_client.adapter = &bus->i2c_adap;
-
- if (0 == bus->i2c_rc) {
- if (i2c_scan)
- cx231xx_do_i2c_scan(dev, &bus->i2c_client);
- } else
- cx231xx_warn("%s: i2c bus %d register FAILED\n",
- dev->name, bus->nr);
-
- return bus->i2c_rc;
-}
-
-/*
- * cx231xx_i2c_unregister()
- * unregister i2c_bus
- */
-int cx231xx_i2c_unregister(struct cx231xx_i2c *bus)
-{
- i2c_del_adapter(&bus->i2c_adap);
- return 0;
-}
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