/*
- em2820-i2c.c - driver for Empia EM2820/2840 USB video capture devices
+ em28xx-i2c.c - driver for Empia EM2800/EM2820/2840 USB video capture devices
- Copyright (C) 2005 Markus Rechberger <mrechberger@gmail.com>
- Ludovico Cavedon <cavedon@sssup.it>
- Mauro Carvalho Chehab <mchehab@brturbo.com.br>
-
- Based on the em2800 driver from Sascha Sommer <saschasommer@freenet.de>
+ Copyright (C) 2005 Ludovico Cavedon <cavedon@sssup.it>
+ Markus Rechberger <mrechberger@gmail.com>
+ Mauro Carvalho Chehab <mchehab@brturbo.com.br>
+ Sascha Sommer <saschasommer@freenet.de>
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
#include <linux/kernel.h>
#include <linux/usb.h>
#include <linux/i2c.h>
-#include <linux/videodev.h>
-#include <media/tuner.h>
#include <linux/video_decoder.h>
-/* To be moved to compat.h */
-#if !defined(I2C_HW_B_EM2820)
-#define I2C_HW_B_EM2820 I2C_HW_B_BT848
-#endif
-
-#include "em2820.h"
+#include "em28xx.h"
+#include <media/v4l2-common.h>
+#include <media/tuner.h>
/* ----------------------------------------------------------- */
module_param(i2c_debug, int, 0644);
MODULE_PARM_DESC(i2c_debug, "enable debug messages [i2c]");
-#define dprintk(fmt, args...) if (i2c_debug) do {\
- printk(KERN_DEBUG "%s: %s: " fmt "\n",\
- dev->name, __FUNCTION__ , ##args); } while (0)
-#define dprintk1(fmt, args...) if (i2c_debug) do{ \
- printk(KERN_DEBUG "%s: %s: " fmt, \
+#define dprintk1(lvl,fmt, args...) if (i2c_debug>=lvl) do {\
+ printk(fmt, ##args); } while (0)
+#define dprintk2(lvl,fmt, args...) if (i2c_debug>=lvl) do{ \
+ printk(KERN_DEBUG "%s at %s: " fmt, \
dev->name, __FUNCTION__ , ##args); } while (0)
-#define dprintk2(fmt, args...) if (i2c_debug) do {\
- printk(fmt , ##args); } while (0)
/*
- * i2c_send_bytes()
+ * em2800_i2c_send_max4()
+ * send up to 4 bytes to the i2c device
+ */
+static int em2800_i2c_send_max4(struct em28xx *dev, unsigned char addr,
+ char *buf, int len)
+{
+ int ret;
+ int write_timeout;
+ unsigned char b2[6];
+ BUG_ON(len < 1 || len > 4);
+ b2[5] = 0x80 + len - 1;
+ b2[4] = addr;
+ b2[3] = buf[0];
+ if (len > 1)
+ b2[2] = buf[1];
+ if (len > 2)
+ b2[1] = buf[2];
+ if (len > 3)
+ b2[0] = buf[3];
+
+ ret = dev->em28xx_write_regs(dev, 4 - len, &b2[4 - len], 2 + len);
+ if (ret != 2 + len) {
+ em28xx_warn("writting to i2c device failed (error=%i)\n", ret);
+ return -EIO;
+ }
+ for (write_timeout = EM2800_I2C_WRITE_TIMEOUT; write_timeout > 0;
+ write_timeout -= 5) {
+ ret = dev->em28xx_read_reg(dev, 0x05);
+ if (ret == 0x80 + len - 1)
+ return len;
+ mdelay(5);
+ }
+ em28xx_warn("i2c write timed out\n");
+ return -EIO;
+}
+
+/*
+ * em2800_i2c_send_bytes()
+ */
+static int em2800_i2c_send_bytes(void *data, unsigned char addr, char *buf,
+ short len)
+{
+ char *bufPtr = buf;
+ int ret;
+ int wrcount = 0;
+ int count;
+ int maxLen = 4;
+ struct em28xx *dev = (struct em28xx *)data;
+ while (len > 0) {
+ count = (len > maxLen) ? maxLen : len;
+ ret = em2800_i2c_send_max4(dev, addr, bufPtr, count);
+ if (ret > 0) {
+ len -= count;
+ bufPtr += count;
+ wrcount += count;
+ } else
+ return (ret < 0) ? ret : -EFAULT;
+ }
+ return wrcount;
+}
+
+/*
+ * em2800_i2c_check_for_device()
+ * check if there is a i2c_device at the supplied address
+ */
+static int em2800_i2c_check_for_device(struct em28xx *dev, unsigned char addr)
+{
+ char msg;
+ int ret;
+ int write_timeout;
+ msg = addr;
+ ret = dev->em28xx_write_regs(dev, 0x04, &msg, 1);
+ if (ret < 0) {
+ em28xx_warn("setting i2c device address failed (error=%i)\n",
+ ret);
+ return ret;
+ }
+ msg = 0x84;
+ ret = dev->em28xx_write_regs(dev, 0x05, &msg, 1);
+ if (ret < 0) {
+ em28xx_warn("preparing i2c read failed (error=%i)\n", ret);
+ return ret;
+ }
+ for (write_timeout = EM2800_I2C_WRITE_TIMEOUT; write_timeout > 0;
+ write_timeout -= 5) {
+ unsigned msg = dev->em28xx_read_reg(dev, 0x5);
+ if (msg == 0x94)
+ return -ENODEV;
+ else if (msg == 0x84)
+ return 0;
+ mdelay(5);
+ }
+ return -ENODEV;
+}
+
+/*
+ * em2800_i2c_recv_bytes()
+ * read from the i2c device
+ */
+static int em2800_i2c_recv_bytes(struct em28xx *dev, unsigned char addr,
+ char *buf, int len)
+{
+ int ret;
+ /* check for the device and set i2c read address */
+ ret = em2800_i2c_check_for_device(dev, addr);
+ if (ret) {
+ em28xx_warn
+ ("preparing read at i2c address 0x%x failed (error=%i)\n",
+ addr, ret);
+ return ret;
+ }
+ ret = dev->em28xx_read_reg_req_len(dev, 0x0, 0x3, buf, len);
+ if (ret < 0) {
+ em28xx_warn("reading from i2c device at 0x%x failed (error=%i)",
+ addr, ret);
+ return ret;
+ }
+ return ret;
+}
+
+/*
+ * em28xx_i2c_send_bytes()
* untested for more than 4 bytes
*/
-static int i2c_send_bytes(void *data, unsigned char addr, char *buf, short len,
- int stop)
+static int em28xx_i2c_send_bytes(void *data, unsigned char addr, char *buf,
+ short len, int stop)
{
int wrcount = 0;
- struct em2820 *dev = (struct em2820 *)data;
+ struct em28xx *dev = (struct em28xx *)data;
- wrcount = dev->em2820_write_regs_req(dev, stop ? 2 : 3, addr, buf, len);
+ wrcount = dev->em28xx_write_regs_req(dev, stop ? 2 : 3, addr, buf, len);
return wrcount;
}
/*
- * i2c_recv_byte()
+ * em28xx_i2c_recv_bytes()
* read a byte from the i2c device
*/
-static int i2c_recv_bytes(struct em2820 *dev, unsigned char addr, char *buf,
- int len)
+static int em28xx_i2c_recv_bytes(struct em28xx *dev, unsigned char addr,
+ char *buf, int len)
{
int ret;
- ret = dev->em2820_read_reg_req_len(dev, 2, addr, buf, len);
+ ret = dev->em28xx_read_reg_req_len(dev, 2, addr, buf, len);
if (ret < 0) {
- em2820_warn("reading i2c device failed (error=%i)\n", ret);
+ em28xx_warn("reading i2c device failed (error=%i)\n", ret);
return ret;
}
- if (dev->em2820_read_reg(dev, 0x5) != 0)
+ if (dev->em28xx_read_reg(dev, 0x5) != 0)
return -ENODEV;
return ret;
}
/*
- * i2c_check_for_device()
+ * em28xx_i2c_check_for_device()
* check if there is a i2c_device at the supplied address
*/
-static int i2c_check_for_device(struct em2820 *dev, unsigned char addr)
+static int em28xx_i2c_check_for_device(struct em28xx *dev, unsigned char addr)
{
char msg;
int ret;
msg = addr;
- ret = dev->em2820_read_reg_req(dev, 2, addr);
+ ret = dev->em28xx_read_reg_req(dev, 2, addr);
if (ret < 0) {
- em2820_warn("reading from i2c device failed (error=%i)\n", ret);
+ em28xx_warn("reading from i2c device failed (error=%i)\n", ret);
return ret;
}
- if (dev->em2820_read_reg(dev, 0x5) != 0)
+ if (dev->em28xx_read_reg(dev, 0x5) != 0)
return -ENODEV;
return 0;
}
/*
- * em2820_i2c_xfer()
+ * em28xx_i2c_xfer()
* the main i2c transfer function
*/
-static int em2820_i2c_xfer(struct i2c_adapter *i2c_adap,
+static int em28xx_i2c_xfer(struct i2c_adapter *i2c_adap,
struct i2c_msg msgs[], int num)
{
- struct em2820 *dev = i2c_adap->algo_data;
+ struct em28xx *dev = i2c_adap->algo_data;
int addr, rc, i, byte;
if (num <= 0)
return 0;
for (i = 0; i < num; i++) {
addr = msgs[i].addr << 1;
- dprintk1("%s %s addr=%x len=%d:",
+ 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 = i2c_check_for_device(dev, addr);
+ if (dev->is_em2800)
+ rc = em2800_i2c_check_for_device(dev, addr);
+ else
+ rc = em28xx_i2c_check_for_device(dev, addr);
if (rc < 0) {
- dprintk2(" no device\n");
+ dprintk2(2," no device\n");
return rc;
}
- }
- if (msgs[i].flags & I2C_M_RD) {
+ } else if (msgs[i].flags & I2C_M_RD) {
/* read bytes */
-
- rc = i2c_recv_bytes(dev, addr, msgs[i].buf,
- msgs[i].len);
- if (i2c_debug) {
+ if (dev->is_em2800)
+ rc = em2800_i2c_recv_bytes(dev, addr,
+ msgs[i].buf,
+ msgs[i].len);
+ else
+ rc = em28xx_i2c_recv_bytes(dev, addr,
+ msgs[i].buf,
+ msgs[i].len);
+ if (i2c_debug>=2) {
for (byte = 0; byte < msgs[i].len; byte++) {
printk(" %02x", msgs[i].buf[byte]);
}
}
} else {
/* write bytes */
- if (i2c_debug) {
+ if (i2c_debug>=2) {
for (byte = 0; byte < msgs[i].len; byte++)
printk(" %02x", msgs[i].buf[byte]);
}
- rc = i2c_send_bytes(dev, addr, msgs[i].buf, msgs[i].len,
- i == num - 1);
+ if (dev->is_em2800)
+ rc = em2800_i2c_send_bytes(dev, addr,
+ msgs[i].buf,
+ msgs[i].len);
+ else
+ rc = em28xx_i2c_send_bytes(dev, addr,
+ msgs[i].buf,
+ msgs[i].len,
+ i == num - 1);
if (rc < 0)
goto err;
}
- if (i2c_debug)
+ if (i2c_debug>=2)
printk("\n");
}
return num;
err:
- dprintk2(" ERROR: %i\n", rc);
+ dprintk2(2," ERROR: %i\n", rc);
return rc;
}
-static int em2820_i2c_eeprom(struct em2820 *dev, unsigned char *eedata, int len)
+static int em28xx_i2c_eeprom(struct em28xx *dev, unsigned char *eedata, int len)
{
unsigned char buf, *p = eedata;
- struct em2820_eeprom *em_eeprom = (void *)eedata;
+ struct em28xx_eeprom *em_eeprom = (void *)eedata;
int i, err, size = len, block;
dev->i2c_client.addr = 0xa0 >> 1;
+
+ /* Check if board has eeprom */
+ err = i2c_master_recv(&dev->i2c_client, &buf, 0);
+ if (err < 0)
+ return -1;
+
buf = 0;
if (1 != (err = i2c_master_send(&dev->i2c_client, &buf, 1))) {
printk(KERN_INFO "%s: Huh, no eeprom present (err=%d)?\n",
printk(KERN_INFO "200mA max power\n");
break;
}
+ printk(KERN_INFO "Table at 0x%02x, strings=0x%04x, 0x%04x, 0x%04x\n",
+ em_eeprom->string_idx_table,em_eeprom->string1,
+ em_eeprom->string2,em_eeprom->string3);
return 0;
}
}
#endif
-static int em2820_set_tuner(int check_eeprom, struct i2c_client *client)
+static int em28xx_set_tuner(int check_eeprom, struct i2c_client *client)
{
- struct em2820 *dev = client->adapter->algo_data;
+ struct em28xx *dev = client->adapter->algo_data;
struct tuner_setup tun_setup;
if (dev->has_tuner) {
tun_setup.type = dev->tuner_type;
tun_setup.addr = dev->tuner_addr;
- em2820_i2c_call_clients(dev, TUNER_SET_TYPE_ADDR, &tun_setup);
+ em28xx_i2c_call_clients(dev, TUNER_SET_TYPE_ADDR, &tun_setup);
}
return (0);
*/
static int attach_inform(struct i2c_client *client)
{
- struct em2820 *dev = client->adapter->algo_data;
+ struct em28xx *dev = client->adapter->algo_data;
- dprintk("address %x", client->addr << 1);
switch (client->addr << 1) {
- case 0x68:
- em2820_i2c_call_clients(dev, TDA9887_SET_CONFIG, &dev->tda9887_conf);
- break;
- case 0x4a:
- dprintk1("attach_inform: saa7113 detected.\n");
- break;
- case 0xa0:
- dprintk1("attach_inform: eeprom detected.\n");
- break;
- case 0x80:
- case 0x88:
- dprintk1("attach_inform: msp34xx detected.\n");
- break;
- case 0xb8:
- case 0xba:
- dprintk1("attach_inform: tvp5150 detected.\n");
- break;
- default:
- dev->tuner_addr = client->addr;
- em2820_set_tuner(-1, client);
+ case 0x86:
+ em28xx_i2c_call_clients(dev, TDA9887_SET_CONFIG, &dev->tda9887_conf);
+ break;
+ case 0x42:
+ dprintk1(1,"attach_inform: saa7114 detected.\n");
+ break;
+ case 0x4a:
+ dprintk1(1,"attach_inform: saa7113 detected.\n");
+ break;
+ case 0xa0:
+ dprintk1(1,"attach_inform: eeprom detected.\n");
+ break;
+ case 0x60:
+ case 0x8e:
+ {
+ struct IR_i2c *ir = i2c_get_clientdata(client);
+ dprintk1(1,"attach_inform: IR detected (%s).\n",ir->phys);
+ em28xx_set_ir(dev,ir);
+ break;
+ }
+ case 0x80:
+ case 0x88:
+ dprintk1(1,"attach_inform: msp34xx detected.\n");
+ break;
+ case 0xb8:
+ case 0xba:
+ dprintk1(1,"attach_inform: tvp5150 detected.\n");
+ break;
+ default:
+ dprintk1(1,"attach inform: detected I2C address %x\n", client->addr << 1);
+ dev->tuner_addr = client->addr;
+ em28xx_set_tuner(-1, client);
}
return 0;
}
-static struct i2c_algorithm em2820_algo = {
- .master_xfer = em2820_i2c_xfer,
+static struct i2c_algorithm em28xx_algo = {
+ .master_xfer = em28xx_i2c_xfer,
.algo_control = algo_control,
.functionality = functionality,
};
-static struct i2c_adapter em2820_adap_template = {
+static struct i2c_adapter em28xx_adap_template = {
#ifdef I2C_PEC
.owner = THIS_MODULE,
#else
.inc_use = inc_use,
.dec_use = dec_use,
#endif
-#ifdef I2C_CLASS_TV_ANALOG
.class = I2C_CLASS_TV_ANALOG,
-#endif
- .name = "em2820",
- .id = I2C_HW_B_EM2820,
- .algo = &em2820_algo,
+ .name = "em28xx",
+ .id = I2C_HW_B_EM28XX,
+ .algo = &em28xx_algo,
.client_register = attach_inform,
};
-static struct i2c_client em2820_client_template = {
- .name = "em2820 internal",
- .flags = I2C_CLIENT_ALLOW_USE,
+static struct i2c_client em28xx_client_template = {
+ .name = "em28xx internal",
};
/* ----------------------------------------------------------- */
static char *i2c_devs[128] = {
[0x4a >> 1] = "saa7113h",
[0x60 >> 1] = "remote IR sensor",
+ [0x8e >> 1] = "remote IR sensor",
[0x86 >> 1] = "tda9887",
[0x80 >> 1] = "msp34xx",
[0x88 >> 1] = "msp34xx",
rc = i2c_master_recv(c, &buf, 0);
if (rc < 0)
continue;
- printk(KERN_INFO "%s: found device @ 0x%x [%s]", name,
+ printk(KERN_INFO "%s: found i2c device @ 0x%x [%s]\n", name,
i << 1, i2c_devs[i] ? i2c_devs[i] : "???");
}
}
/*
- * em2820_i2c_call_clients()
+ * em28xx_i2c_call_clients()
* send commands to all attached i2c devices
*/
-void em2820_i2c_call_clients(struct em2820 *dev, unsigned int cmd, void *arg)
+void em28xx_i2c_call_clients(struct em28xx *dev, unsigned int cmd, void *arg)
{
BUG_ON(NULL == dev->i2c_adap.algo_data);
i2c_clients_command(&dev->i2c_adap, cmd, arg);
}
/*
- * em2820_i2c_register()
+ * em28xx_i2c_register()
* register i2c bus
*/
-int em2820_i2c_register(struct em2820 *dev)
+int em28xx_i2c_register(struct em28xx *dev)
{
- BUG_ON(!dev->em2820_write_regs || !dev->em2820_read_reg);
- BUG_ON(!dev->em2820_write_regs_req || !dev->em2820_read_reg_req);
- dev->i2c_adap = em2820_adap_template;
+ BUG_ON(!dev->em28xx_write_regs || !dev->em28xx_read_reg);
+ BUG_ON(!dev->em28xx_write_regs_req || !dev->em28xx_read_reg_req);
+ dev->i2c_adap = em28xx_adap_template;
dev->i2c_adap.dev.parent = &dev->udev->dev;
strcpy(dev->i2c_adap.name, dev->name);
dev->i2c_adap.algo_data = dev;
i2c_add_adapter(&dev->i2c_adap);
- dev->i2c_client = em2820_client_template;
+ dev->i2c_client = em28xx_client_template;
dev->i2c_client.adapter = &dev->i2c_adap;
- em2820_i2c_eeprom(dev, dev->eedata, sizeof(dev->eedata));
+ em28xx_i2c_eeprom(dev, dev->eedata, sizeof(dev->eedata));
if (i2c_scan)
do_i2c_scan(dev->name, &dev->i2c_client);
}
/*
- * em2820_i2c_unregister()
+ * em28xx_i2c_unregister()
* unregister i2c_bus
*/
-int em2820_i2c_unregister(struct em2820 *dev)
+int em28xx_i2c_unregister(struct em28xx *dev)
{
i2c_del_adapter(&dev->i2c_adap);
return 0;
git.openpandora.org / pandora-kernel.git / blobdiff