diff options
Diffstat (limited to 'drivers/media/video/em28xx/em28xx-i2c.c')
| -rw-r--r-- | drivers/media/video/em28xx/em28xx-i2c.c | 59 |
1 files changed, 37 insertions, 22 deletions
diff --git a/drivers/media/video/em28xx/em28xx-i2c.c b/drivers/media/video/em28xx/em28xx-i2c.c index 3bab56b997f..d69f0efcc9a 100644 --- a/drivers/media/video/em28xx/em28xx-i2c.c +++ b/drivers/media/video/em28xx/em28xx-i2c.c @@ -250,7 +250,7 @@ static int em28xx_i2c_xfer(struct i2c_adapter *i2c_adap, (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 */ - if (dev->is_em2800) + if (dev->board.is_em2800) rc = em2800_i2c_check_for_device(dev, addr); else rc = em28xx_i2c_check_for_device(dev, addr); @@ -261,7 +261,7 @@ static int em28xx_i2c_xfer(struct i2c_adapter *i2c_adap, } else if (msgs[i].flags & I2C_M_RD) { /* read bytes */ - if (dev->is_em2800) + if (dev->board.is_em2800) rc = em2800_i2c_recv_bytes(dev, addr, msgs[i].buf, msgs[i].len); @@ -279,7 +279,7 @@ static int em28xx_i2c_xfer(struct i2c_adapter *i2c_adap, for (byte = 0; byte < msgs[i].len; byte++) printk(" %02x", msgs[i].buf[byte]); } - if (dev->is_em2800) + if (dev->board.is_em2800) rc = em2800_i2c_send_bytes(dev, addr, msgs[i].buf, msgs[i].len); @@ -332,14 +332,25 @@ static int em28xx_i2c_eeprom(struct em28xx *dev, unsigned char *eedata, int len) struct em28xx_eeprom *em_eeprom = (void *)eedata; int i, err, size = len, block; + if (dev->chip_id == CHIP_ID_EM2874) { + /* Empia switched to a 16-bit addressable eeprom in newer + devices. While we could certainly write a routine to read + the eeprom, there is nothing of use in there that cannot be + accessed through registers, and there is the risk that we + could corrupt the eeprom (since a 16-bit read call is + interpreted as a write call by 8-bit eeproms). + */ + return 0; + } + dev->i2c_client.addr = 0xa0 >> 1; /* Check if board has eeprom */ err = i2c_master_recv(&dev->i2c_client, &buf, 0); if (err < 0) { - em28xx_errdev("%s: i2c_master_recv failed! err [%d]\n", - __func__, err); - return err; + em28xx_errdev("board has no eeprom\n"); + memset(eedata, 0, len); + return -ENODEV; } buf = 0; @@ -377,47 +388,49 @@ static int em28xx_i2c_eeprom(struct em28xx *dev, unsigned char *eedata, int len) if (em_eeprom->id == 0x9567eb1a) dev->hash = em28xx_hash_mem(eedata, len, 32); - printk(KERN_INFO "EEPROM ID= 0x%08x, hash = 0x%08lx\n", - em_eeprom->id, dev->hash); - printk(KERN_INFO "Vendor/Product ID= %04x:%04x\n", em_eeprom->vendor_ID, - em_eeprom->product_ID); + printk(KERN_INFO "%s: EEPROM ID= 0x%08x, EEPROM hash = 0x%08lx\n", + dev->name, em_eeprom->id, dev->hash); + + printk(KERN_INFO "%s: EEPROM info:\n", dev->name); switch (em_eeprom->chip_conf >> 4 & 0x3) { case 0: - printk(KERN_INFO "No audio on board.\n"); + printk(KERN_INFO "%s:\tNo audio on board.\n", dev->name); break; case 1: - printk(KERN_INFO "AC97 audio (5 sample rates)\n"); + printk(KERN_INFO "%s:\tAC97 audio (5 sample rates)\n", + dev->name); break; case 2: - printk(KERN_INFO "I2S audio, sample rate=32k\n"); + printk(KERN_INFO "%s:\tI2S audio, sample rate=32k\n", dev->name); break; case 3: - printk(KERN_INFO "I2S audio, 3 sample rates\n"); + printk(KERN_INFO "%s:\tI2S audio, 3 sample rates\n", dev->name); break; } if (em_eeprom->chip_conf & 1 << 3) - printk(KERN_INFO "USB Remote wakeup capable\n"); + printk(KERN_INFO "%s:\tUSB Remote wakeup capable\n", dev->name); if (em_eeprom->chip_conf & 1 << 2) - printk(KERN_INFO "USB Self power capable\n"); + printk(KERN_INFO "%s:\tUSB Self power capable\n", dev->name); switch (em_eeprom->chip_conf & 0x3) { case 0: - printk(KERN_INFO "500mA max power\n"); + printk(KERN_INFO "%s:\t500mA max power\n", dev->name); break; case 1: - printk(KERN_INFO "400mA max power\n"); + printk(KERN_INFO "%s:\t400mA max power\n", dev->name); break; case 2: - printk(KERN_INFO "300mA max power\n"); + printk(KERN_INFO "%s:\t300mA max power\n", dev->name); break; case 3: - printk(KERN_INFO "200mA max power\n"); + printk(KERN_INFO "%s:\t200mA max power\n", dev->name); break; } - printk(KERN_INFO "Table at 0x%02x, strings=0x%04x, 0x%04x, 0x%04x\n", + printk(KERN_INFO "%s:\tTable at 0x%02x, strings=0x%04x, 0x%04x, 0x%04x\n", + dev->name, em_eeprom->string_idx_table, em_eeprom->string1, em_eeprom->string2, @@ -609,14 +622,16 @@ int em28xx_i2c_register(struct em28xx *dev) dev->i2c_client.adapter = &dev->i2c_adap; retval = em28xx_i2c_eeprom(dev, dev->eedata, sizeof(dev->eedata)); - if (retval < 0) { + if ((retval < 0) && (retval != -ENODEV)) { em28xx_errdev("%s: em28xx_i2_eeprom failed! retval [%d]\n", __func__, retval); + return retval; } if (i2c_scan) em28xx_do_i2c_scan(dev); + return 0; } |