From: Robert Foss <robert.foss@linaro.org> To: Dongchun Zhu <dongchun.zhu@mediatek.com>, Fabio Estevam <festevam@gmail.com>, Andy Shevchenko <andriy.shevchenko@linux.intel.com>, Sakari Ailus <sakari.ailus@iki.fi>, Tomasz Figa <tfiga@chromium.org>, linux-media@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: Robert Foss <robert.foss@linaro.org> Subject: [PATCH v3 3/3] media: ov8856: Implement sensor module revision identification Date: Tue, 31 Mar 2020 15:33:46 +0200 [thread overview] Message-ID: <20200331133346.372517-4-robert.foss@linaro.org> (raw) In-Reply-To: <20200331133346.372517-1-robert.foss@linaro.org> Query the sensor for its module revision, and compare it to known revisions. Currently only the '1B' revision has been added. Signed-off-by: Robert Foss <robert.foss@linaro.org> --- - Changes since v2: * Add module revision 2A * Sakari: Remove ov8856_check_revision() * Sakari: Stop EEPROM streaming mode drivers/media/i2c/ov8856.c | 51 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 51 insertions(+) diff --git a/drivers/media/i2c/ov8856.c b/drivers/media/i2c/ov8856.c index 260aaf332631..c7551cee2bb0 100644 --- a/drivers/media/i2c/ov8856.c +++ b/drivers/media/i2c/ov8856.c @@ -32,6 +32,18 @@ #define OV8856_MODE_STANDBY 0x00 #define OV8856_MODE_STREAMING 0x01 +/* define 1B module revision */ +#define OV8856_1B_MODULE 0x02 + +/* the OTP read-out buffer is at 0x7000 and 0xf is the offset + * of the byte in the OTP that means the module revision + */ +#define OV8856_MODULE_REVISION 0x700f +#define OV8856_OTP_MODE_CTRL 0x3d84 +#define OV8856_OTP_LOAD_CTRL 0x3d81 +#define OV8856_OTP_MODE_AUTO 0x00 +#define OV8856_OTP_LOAD_CTRL_ENABLE BIT(0) + /* vertical-timings from sensor */ #define OV8856_REG_VTS 0x380e #define OV8856_VTS_MAX 0x7fff @@ -1152,6 +1164,45 @@ static int ov8856_identify_module(struct ov8856 *ov8856) return -ENXIO; } + ret = ov8856_write_reg(ov8856, OV8856_REG_MODE_SELECT, + OV8856_REG_VALUE_08BIT, OV8856_MODE_STREAMING); + if (ret) + return ret; + + ret = ov8856_write_reg(ov8856, OV8856_OTP_MODE_CTRL, + OV8856_REG_VALUE_08BIT, OV8856_OTP_MODE_AUTO); + if (ret) { + dev_err(&client->dev, "failed to set otp mode"); + return ret; + } + + ret = ov8856_write_reg(ov8856, OV8856_OTP_LOAD_CTRL, + OV8856_REG_VALUE_08BIT, + OV8856_OTP_LOAD_CTRL_ENABLE); + if (ret) { + dev_err(&client->dev, "failed to enable load control"); + return ret; + } + + ret = ov8856_read_reg(ov8856, OV8856_MODULE_REVISION, + OV8856_REG_VALUE_08BIT, &val); + if (ret) { + dev_err(&client->dev, "failed to read module revision"); + return ret; + } + + dev_info(&client->dev, "OV8856 revision %x (%s) at address 0x%02x\n", + val, + val == OV8856_1B_MODULE ? "1B" : "unknown revision", + client->addr); + + ret = ov8856_write_reg(ov8856, OV8856_REG_MODE_SELECT, + OV8856_REG_VALUE_08BIT, OV8856_MODE_STANDBY); + if (ret) { + dev_err(&client->dev, "failed to exit streaming mode"); + return ret; + } + return 0; } -- 2.25.1
WARNING: multiple messages have this Message-ID (diff)
From: Robert Foss <robert.foss@linaro.org> To: Dongchun Zhu <dongchun.zhu@mediatek.com>, Fabio Estevam <festevam@gmail.com>, Andy Shevchenko <andriy.shevchenko@linux.intel.com>, Sakari Ailus <sakari.ailus@iki.fi>, Tomasz Figa <tfiga@chromium.org>, linux-media@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: Robert Foss <robert.foss@linaro.org> Subject: [PATCH v3 3/3] media: ov8856: Implement sensor module revision identification Date: Tue, 31 Mar 2020 15:33:46 +0200 [thread overview] Message-ID: <20200331133346.372517-4-robert.foss@linaro.org> (raw) In-Reply-To: <20200331133346.372517-1-robert.foss@linaro.org> Query the sensor for its module revision, and compare it to known revisions. Currently only the '1B' revision has been added. Signed-off-by: Robert Foss <robert.foss@linaro.org> --- - Changes since v2: * Add module revision 2A * Sakari: Remove ov8856_check_revision() * Sakari: Stop EEPROM streaming mode drivers/media/i2c/ov8856.c | 51 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 51 insertions(+) diff --git a/drivers/media/i2c/ov8856.c b/drivers/media/i2c/ov8856.c index 260aaf332631..c7551cee2bb0 100644 --- a/drivers/media/i2c/ov8856.c +++ b/drivers/media/i2c/ov8856.c @@ -32,6 +32,18 @@ #define OV8856_MODE_STANDBY 0x00 #define OV8856_MODE_STREAMING 0x01 +/* define 1B module revision */ +#define OV8856_1B_MODULE 0x02 + +/* the OTP read-out buffer is at 0x7000 and 0xf is the offset + * of the byte in the OTP that means the module revision + */ +#define OV8856_MODULE_REVISION 0x700f +#define OV8856_OTP_MODE_CTRL 0x3d84 +#define OV8856_OTP_LOAD_CTRL 0x3d81 +#define OV8856_OTP_MODE_AUTO 0x00 +#define OV8856_OTP_LOAD_CTRL_ENABLE BIT(0) + /* vertical-timings from sensor */ #define OV8856_REG_VTS 0x380e #define OV8856_VTS_MAX 0x7fff @@ -1152,6 +1164,45 @@ static int ov8856_identify_module(struct ov8856 *ov8856) return -ENXIO; } + ret = ov8856_write_reg(ov8856, OV8856_REG_MODE_SELECT, + OV8856_REG_VALUE_08BIT, OV8856_MODE_STREAMING); + if (ret) + return ret; + + ret = ov8856_write_reg(ov8856, OV8856_OTP_MODE_CTRL, + OV8856_REG_VALUE_08BIT, OV8856_OTP_MODE_AUTO); + if (ret) { + dev_err(&client->dev, "failed to set otp mode"); + return ret; + } + + ret = ov8856_write_reg(ov8856, OV8856_OTP_LOAD_CTRL, + OV8856_REG_VALUE_08BIT, + OV8856_OTP_LOAD_CTRL_ENABLE); + if (ret) { + dev_err(&client->dev, "failed to enable load control"); + return ret; + } + + ret = ov8856_read_reg(ov8856, OV8856_MODULE_REVISION, + OV8856_REG_VALUE_08BIT, &val); + if (ret) { + dev_err(&client->dev, "failed to read module revision"); + return ret; + } + + dev_info(&client->dev, "OV8856 revision %x (%s) at address 0x%02x\n", + val, + val == OV8856_1B_MODULE ? "1B" : "unknown revision", + client->addr); + + ret = ov8856_write_reg(ov8856, OV8856_REG_MODE_SELECT, + OV8856_REG_VALUE_08BIT, OV8856_MODE_STANDBY); + if (ret) { + dev_err(&client->dev, "failed to exit streaming mode"); + return ret; + } + return 0; } -- 2.25.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2020-03-31 13:34 UTC|newest] Thread overview: 76+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-03-31 13:33 [PATCH v3 0/3] media: ov8856: Add devicetree support Robert Foss 2020-03-31 13:33 ` Robert Foss 2020-03-31 13:33 ` [PATCH v6 1/3] media: dt-bindings: ov8856: Document YAML bindings Robert Foss 2020-03-31 13:33 ` Robert Foss 2020-03-31 15:12 ` Marco Felsch 2020-03-31 15:12 ` Marco Felsch 2020-04-02 9:57 ` Robert Foss 2020-04-02 9:57 ` Robert Foss 2020-04-03 19:21 ` Marco Felsch 2020-04-03 19:21 ` Marco Felsch 2020-04-01 8:07 ` Maxime Ripard 2020-04-01 8:07 ` Maxime Ripard 2020-04-02 10:10 ` Robert Foss 2020-04-02 10:10 ` Robert Foss 2020-04-03 23:27 ` Sakari Ailus 2020-04-03 23:27 ` Sakari Ailus 2020-04-04 9:34 ` Maxime Ripard 2020-04-04 9:34 ` Maxime Ripard 2020-04-06 8:25 ` Robert Foss 2020-04-06 8:25 ` Robert Foss 2020-04-06 8:35 ` Sakari Ailus 2020-04-06 8:35 ` Sakari Ailus 2020-04-07 8:36 ` Maxime Ripard 2020-04-07 8:36 ` Maxime Ripard 2020-04-07 11:29 ` Robert Foss 2020-04-07 11:29 ` Robert Foss 2020-04-07 12:32 ` Maxime Ripard 2020-04-07 12:32 ` Maxime Ripard 2020-04-07 15:47 ` Robert Foss 2020-04-07 15:47 ` Robert Foss 2020-04-07 16:39 ` Sakari Ailus 2020-04-07 16:39 ` Sakari Ailus 2020-04-07 16:46 ` Tomasz Figa 2020-04-07 16:46 ` Tomasz Figa 2020-04-07 17:20 ` Sakari Ailus 2020-04-07 17:20 ` Sakari Ailus 2020-04-08 12:21 ` Maxime Ripard 2020-04-08 12:21 ` Maxime Ripard 2020-04-08 12:35 ` Tomasz Figa 2020-04-08 12:35 ` Tomasz Figa 2020-04-08 13:43 ` Maxime Ripard 2020-04-08 13:43 ` Maxime Ripard 2020-04-08 15:28 ` Sakari Ailus 2020-04-08 15:28 ` Sakari Ailus 2020-04-08 15:30 ` Sakari Ailus 2020-04-08 15:30 ` Sakari Ailus 2020-04-08 16:34 ` Andy Shevchenko 2020-04-08 16:34 ` Andy Shevchenko 2020-04-15 10:18 ` Maxime Ripard 2020-04-15 10:18 ` Maxime Ripard 2020-04-15 11:10 ` Robert Foss 2020-04-15 11:10 ` Robert Foss 2020-04-15 16:16 ` Sakari Ailus 2020-04-15 16:16 ` Sakari Ailus 2020-04-20 15:02 ` Maxime Ripard 2020-04-20 15:02 ` Maxime Ripard 2020-04-09 8:32 ` Robert Foss 2020-04-09 8:32 ` Robert Foss 2020-04-07 16:20 ` Sakari Ailus 2020-04-07 16:20 ` Sakari Ailus 2020-04-04 9:23 ` Maxime Ripard 2020-04-04 9:23 ` Maxime Ripard 2020-03-31 13:33 ` [PATCH v3 2/3] media: ov8856: Add devicetree support Robert Foss 2020-03-31 13:33 ` Robert Foss 2020-03-31 14:01 ` Andy Shevchenko 2020-03-31 14:01 ` Andy Shevchenko 2020-04-06 13:37 ` Robert Foss 2020-04-06 13:37 ` Robert Foss 2020-04-06 15:06 ` Andy Shevchenko 2020-04-06 15:06 ` Andy Shevchenko 2020-04-06 15:25 ` Robert Foss 2020-04-06 15:25 ` Robert Foss 2020-04-03 23:33 ` Sakari Ailus 2020-04-03 23:33 ` Sakari Ailus 2020-03-31 13:33 ` Robert Foss [this message] 2020-03-31 13:33 ` [PATCH v3 3/3] media: ov8856: Implement sensor module revision identification Robert Foss
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