diff options
| -rw-r--r-- | drivers/media/usb/em28xx/em28xx-cards.c | 4 | ||||
| -rw-r--r-- | drivers/media/usb/em28xx/em28xx-i2c.c | 69 | ||||
| -rw-r--r-- | drivers/media/usb/em28xx/em28xx.h | 1 |
3 files changed, 49 insertions, 25 deletions
diff --git a/drivers/media/usb/em28xx/em28xx-cards.c b/drivers/media/usb/em28xx/em28xx-cards.c index 9332d051bde9..f371dbede27e 100644 --- a/drivers/media/usb/em28xx/em28xx-cards.c +++ b/drivers/media/usb/em28xx/em28xx-cards.c @@ -2183,6 +2183,7 @@ static struct em28xx_hash_table em28xx_i2c_hash[] = { {0x4ba50080, EM2861_BOARD_GADMEI_UTV330PLUS, TUNER_TNF_5335MF}, {0x6b800080, EM2874_BOARD_LEADERSHIP_ISDBT, TUNER_ABSENT}, }; +/* NOTE: introduce a separate hash table for devices with 16 bit eeproms */ /* I2C possible address to saa7115, tvp5150, msp3400, tvaudio */ static unsigned short saa711x_addrs[] = { @@ -3019,11 +3020,13 @@ static int em28xx_init_dev(struct em28xx *dev, struct usb_device *udev, chip_name = "em2874"; dev->reg_gpio_num = EM2874_R80_GPIO; dev->wait_after_write = 0; + dev->eeprom_addrwidth_16bit = 1; break; case CHIP_ID_EM28174: chip_name = "em28174"; dev->reg_gpio_num = EM2874_R80_GPIO; dev->wait_after_write = 0; + dev->eeprom_addrwidth_16bit = 1; break; case CHIP_ID_EM2883: chip_name = "em2882/3"; @@ -3033,6 +3036,7 @@ static int em28xx_init_dev(struct em28xx *dev, struct usb_device *udev, chip_name = "em2884"; dev->reg_gpio_num = EM2874_R80_GPIO; dev->wait_after_write = 0; + dev->eeprom_addrwidth_16bit = 1; break; default: printk(KERN_INFO DRIVER_NAME diff --git a/drivers/media/usb/em28xx/em28xx-i2c.c b/drivers/media/usb/em28xx/em28xx-i2c.c index 1b90e7536aa5..3f0012c9cf25 100644 --- a/drivers/media/usb/em28xx/em28xx-i2c.c +++ b/drivers/media/usb/em28xx/em28xx-i2c.c @@ -372,46 +372,34 @@ static inline unsigned long em28xx_hash_mem(char *buf, int length, int bits) static int em28xx_i2c_eeprom(struct em28xx *dev, unsigned char *eedata, int len) { - unsigned char buf, *p = eedata; + unsigned char buf[2], *p = eedata; struct em28xx_eeprom *em_eeprom = (void *)eedata; int i, err, size = len, block, block_max; - if (dev->chip_id == CHIP_ID_EM2874 || - dev->chip_id == CHIP_ID_EM28174 || - dev->chip_id == CHIP_ID_EM2884) { - /* 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); + err = i2c_master_recv(&dev->i2c_client, buf, 0); if (err < 0) { em28xx_info("board has no eeprom\n"); memset(eedata, 0, len); return -ENODEV; } - buf = 0; - - err = i2c_master_send(&dev->i2c_client, &buf, 1); - if (err != 1) { + /* Select address memory address 0x00(00) */ + buf[0] = 0; + buf[1] = 0; + err = i2c_master_send(&dev->i2c_client, buf, 1 + dev->eeprom_addrwidth_16bit); + if (err != 1 + dev->eeprom_addrwidth_16bit) { em28xx_errdev("failed to read eeprom (err=%d)\n", err); return err; } + /* Read eeprom content */ if (dev->board.is_em2800) block_max = 4; else block_max = 64; - while (size > 0) { if (size > block_max) block = block_max; @@ -426,17 +414,48 @@ static int em28xx_i2c_eeprom(struct em28xx *dev, unsigned char *eedata, int len) size -= block; p += block; } + + /* Display eeprom content */ for (i = 0; i < len; i++) { - if (0 == (i % 16)) - em28xx_info("i2c eeprom %02x:", i); + if (0 == (i % 16)) { + if (dev->eeprom_addrwidth_16bit) + em28xx_info("i2c eeprom %04x:", i); + else + em28xx_info("i2c eeprom %02x:", i); + } printk(" %02x", eedata[i]); if (15 == (i % 16)) printk("\n"); } - if (em_eeprom->id[0] != 0x1a || em_eeprom->id[1] != 0xeb || - em_eeprom->id[2] != 0x67 || em_eeprom->id[3] != 0x95) { - em28xx_errdev("Unknown eeprom type or eeprom corrupted !"); + if (dev->eeprom_addrwidth_16bit && + eedata[0] == 0x26 && eedata[3] == 0x00) { + /* new eeprom format; size 4-64kb */ + dev->hash = em28xx_hash_mem(eedata, len, 32); + em28xx_info("EEPROM hash = 0x%08lx\n", dev->hash); + em28xx_info("EEPROM info: boot page address = 0x%02x04, " + "boot configuration = 0x%02x\n", + eedata[1], eedata[2]); + /* boot configuration (address 0x0002): + * [0] microcode download speed: 1 = 400 kHz; 0 = 100 kHz + * [1] always selects 12 kb RAM + * [2] USB device speed: 1 = force Full Speed; 0 = auto detect + * [4] 1 = force fast mode and no suspend for device testing + * [5:7] USB PHY tuning registers; determined by device + * characterization + */ + + /* FIXME: + * - read more than 256 bytes / addresses above 0x00ff + * - find offset for device config dataset and extract it + * - decrypt eeprom data for camera bridges (em25xx, em276x+) + * - use separate/different eeprom hashes (not yet used) + */ + + return 0; + } else if (em_eeprom->id[0] != 0x1a || em_eeprom->id[1] != 0xeb || + em_eeprom->id[2] != 0x67 || em_eeprom->id[3] != 0x95) { + em28xx_info("unknown eeprom format or eeprom corrupted !\n"); return -ENODEV; } diff --git a/drivers/media/usb/em28xx/em28xx.h b/drivers/media/usb/em28xx/em28xx.h index 90266a1e7957..139dfe54a057 100644 --- a/drivers/media/usb/em28xx/em28xx.h +++ b/drivers/media/usb/em28xx/em28xx.h @@ -510,6 +510,7 @@ struct em28xx { /* i2c i/o */ struct i2c_adapter i2c_adap; struct i2c_client i2c_client; + unsigned char eeprom_addrwidth_16bit:1; /* video for linux */ int users; /* user count for exclusive use */ int streaming_users; /* Number of actively streaming users */ |