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From bb5a3717068ec667d316a051354b4edff069bf33 Mon Sep 17 00:00:00 2001
From: Vladimir Barinov <vladimir.barinov@cogentembedded.com>
Date: Fri, 5 Jul 2019 14:04:11 +0300
Subject: [PATCH] media: i2c: ap0101-ar014x: get OTP more complex
Involve more OTP bytes for ID to reduce the chance of similar OTP_IDs
Signed-off-by: Vladimir Barinov <vladimir.barinov@cogentembedded.com>
---
drivers/media/i2c/soc_camera/ap0101_ar014x.c | 20 ++++++++++----------
1 file changed, 10 insertions(+), 10 deletions(-)
diff --git a/drivers/media/i2c/soc_camera/ap0101_ar014x.c b/drivers/media/i2c/soc_camera/ap0101_ar014x.c
index 03b50e9..74e6e51 100644
--- a/drivers/media/i2c/soc_camera/ap0101_ar014x.c
+++ b/drivers/media/i2c/soc_camera/ap0101_ar014x.c
@@ -97,16 +97,16 @@ static u16 ap0101_ar014x_read(struct i2c_client *client, u16 addr)
u16 reg_val = 0;
reg16_write16(client, 0x0040, 0x8d00);
- usleep_range(100, 150); /* wait 100 us */
+ usleep_range(1000, 1500); /* wait 1000 us */
reg16_write16(client, 0xfc00, addr);
reg16_write16(client, 0xfc02, 0x0200); /* 2 bytes */
reg16_write16(client, 0x0040, 0x8d05);
- usleep_range(100, 150); /* wait 100 us */
+ usleep_range(1000, 1500); /* wait 1000 us */
reg16_write16(client, 0x0040, 0x8d08);
- usleep_range(100, 150); /* wait 100 us */
+ usleep_range(1000, 1500); /* wait 1000 us */
reg16_read16(client, 0xfc00, ®_val);
reg16_write16(client, 0x0040, 0x8d02);
- usleep_range(100, 150); /* wait 100 us */
+ usleep_range(1000, 1500); /* wait 1000 us */
return reg_val;
}
@@ -114,16 +114,16 @@ static u16 ap0101_ar014x_read(struct i2c_client *client, u16 addr)
static void ap0101_ar014x_write(struct i2c_client *client, u16 addr, u16 val)
{
reg16_write16(client, 0x0040, 0x8d00);
- usleep_range(100, 150); /* wait 100 us */
+ usleep_range(1000, 1500); /* wait 1000 us */
reg16_write16(client, 0xfc00, addr);
reg16_write16(client, 0xfc02, 0x0200 | (val >> 8)); /* 2 bytes */
reg16_write16(client, 0xfc04, (val & 0xff) << 8);
reg16_write16(client, 0x0040, 0x8d06);
- usleep_range(100, 150); /* wait 100 us */
+ usleep_range(1000, 1500); /* wait 1000 us */
reg16_write16(client, 0x0040, 0x8d08);
- usleep_range(100, 150); /* wait 100 us */
+ usleep_range(1000, 1500); /* wait 1000 us */
reg16_write16(client, 0x0040, 0x8d02);
- usleep_range(100, 150); /* wait 100 us */
+ usleep_range(1000, 1500); /* wait 1000 us */
}
static int ap0101_s_stream(struct v4l2_subdev *sd, int enable)
@@ -383,8 +383,8 @@ static void ap0101_otp_id_read(struct i2c_client *client)
for (i = 0; i < 6; i += 2) {
/* first 4 bytes are equal on all ar014x */
- priv->id[i] = ap0101_ar014x_read(client, 0x3800 + i + 4) >> 8;
- priv->id[i + 1] = ap0101_ar014x_read(client, 0x3800 + i + 4) & 0xff;
+ priv->id[i] = (ap0101_ar014x_read(client, 0x3800 + i + 4) >> 8) ^ (ap0101_ar014x_read(client, 0x3800 + i + 16) >> 8);
+ priv->id[i + 1] = (ap0101_ar014x_read(client, 0x3800 + i + 4) & 0xff) ^ (ap0101_ar014x_read(client, 0x3800 + i + 16) & 0xff);
}
}
--
2.7.4
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