diff options
Diffstat (limited to 'drivers/media/video/tegra/ar0832_main.c')
| -rw-r--r-- | drivers/media/video/tegra/ar0832_main.c | 85 |
1 files changed, 80 insertions, 5 deletions
diff --git a/drivers/media/video/tegra/ar0832_main.c b/drivers/media/video/tegra/ar0832_main.c index c8859acc5929..58d07b53d41f 100644 --- a/drivers/media/video/tegra/ar0832_main.c +++ b/drivers/media/video/tegra/ar0832_main.c @@ -1,7 +1,7 @@ /* * ar0832_main.c - Aptina AR0832 8M Bayer type sensor driver * -* Copyright (c) 2011, NVIDIA, All Rights Reserved. +* Copyright (c) 2011-2013, NVIDIA CORPORATION, All Rights Reserved. * * This file is licensed under the terms of the GNU General Public License * version 2. This program is licensed "as is" without any warranty of any @@ -24,13 +24,14 @@ #include <linux/module.h> #include <media/ar0832_main.h> - +#include <media/nvc.h> #define POS_ACTUAL_LOW 0 #define POS_ACTUAL_HIGH 255 -#define SETTLE_TIME 100 -#define AR0832_SLEW_RATE_DISABLED 0 -#define AR0832_SLEW_RATE_SLOWEST 7 +#define SETTLE_TIME 100 +#define AR0832_SLEW_RATE_DISABLED 0 +#define AR0832_SLEW_RATE_SLOWEST 7 +#define AR0832_FUSE_ID_SIZE 16 struct ar0832_sensor_info { @@ -63,6 +64,7 @@ struct ar0832_dev { int is_stereo; u16 sensor_id_data; struct dentry *debugdir; + struct nvc_fuseid fuse_id; }; #define UpperByte16to8(x) ((u8)((x & 0xFF00) >> 8)) @@ -2116,6 +2118,63 @@ static long ar0832_set_focuser_capabilities(struct ar0832_dev *dev, return 0; } +static int ar0832_get_fuseid(struct ar0832_dev *dev) +{ + int ret = 0; + int i, timeout; + __u16 bak; + struct i2c_client *i2c_client = dev->i2c_client; + + if (dev->fuse_id.size) + return 0; + + ret = ar0832_write_reg16(i2c_client, 0x3052, 0x2704); + ret |= ar0832_read_reg16(i2c_client, 0x3054, &bak); + ret |= ar0832_write_reg16(i2c_client, 0x3054, bak | 0x0100); + ret |= ar0832_read_reg16(i2c_client, 0x3050, &bak); + ret |= ar0832_write_reg16(i2c_client, 0x3050, bak & 0x00ff); + ret |= ar0832_write_reg16(i2c_client, 0x3054, 0x0008); + ret |= ar0832_read_reg16(i2c_client, 0x304a, &bak); + ret |= ar0832_write_reg16(i2c_client, 0x304a, bak | 0x0010); + + timeout = 0; + while (!(bak & 0x0020)) { + ret |= ar0832_read_reg16(i2c_client, 0x304a, &bak); + timeout += 1; + if (timeout >= 100) { + pr_info("ar0832: fuse ID read timed out\n"); + return -EFAULT; + } + } + + if (bak & 0x0040) + pr_info("ar0832: fuse ID read successfully\n"); + else { + pr_info("ar0832: fuse ID read failed\n"); + return -EFAULT; + } + + /* OTP memory on ar0832 is larger than we are checking - may + * may want to change which bytes are read in the future + */ + dev->fuse_id.size = AR0832_FUSE_ID_SIZE; + for (i = 0; i < 8; i++) { + if (i * 2 < dev->fuse_id.size) { + ret |= ar0832_read_reg16(i2c_client, 0x3800 + i, &bak); + dev->fuse_id.data[i * 2] = + (__u8)((bak >> 8) & 0x00ff); + if (i * 2 + 1 < dev->fuse_id.size) + dev->fuse_id.data[i * 2 + 1] = + (__u8)(bak & 0x00ff); + } + } + + if (ret) + dev->fuse_id.size = 0; + + return ret; +} + static long ar0832_ioctl(struct file *file, unsigned int cmd, unsigned long arg) { @@ -2283,6 +2342,22 @@ static long ar0832_ioctl(struct file *file, } return 0; + case AR0832_IOCTL_GET_FUSEID: + { + err = ar0832_get_fuseid(dev); + if (err) { + pr_err("%s %d %d\n", __func__, __LINE__, err); + return err; + } + if (copy_to_user((void __user *)arg, + &dev->fuse_id, + sizeof(struct nvc_fuseid))) { + pr_info("%s %d\n", __func__, __LINE__); + return -EFAULT; + } + return 0; + } + default: dev_err(&i2c_client->dev, "(error) %s NONE IOCTL\n", __func__); |