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>, Marco Felsch <m.felsch@pengutronix.de>, Tomasz Figa <tfiga@chromium.org>, Maxime Ripard <maxime@cerno.tech>, 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 v4 3/3] media: ov8856: Implement sensor module revision identification Date: Wed, 8 Apr 2020 13:08:16 +0200 [thread overview] Message-ID: <20200408110816.2712841-4-robert.foss@linaro.org> (raw) In-Reply-To: <20200408110816.2712841-1-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 v3: * Actually add module revision 2A - Changes since v2: * Add module revision 2A * Sakari: Remove ov8856_check_revision() * Sakari: Stop EEPROM streaming mode drivers/media/i2c/ov8856.c | 53 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 53 insertions(+) diff --git a/drivers/media/i2c/ov8856.c b/drivers/media/i2c/ov8856.c index 473d3245344a..de0b484b85d0 100644 --- a/drivers/media/i2c/ov8856.c +++ b/drivers/media/i2c/ov8856.c @@ -32,6 +32,19 @@ #define OV8856_MODE_STANDBY 0x00 #define OV8856_MODE_STREAMING 0x01 +/* module revisions */ +#define OV8856_2A_MODULE 0x01 +#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 +1165,46 @@ 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_2A_MODULE ? "2A" : + 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>, Marco Felsch <m.felsch@pengutronix.de>, Tomasz Figa <tfiga@chromium.org>, Maxime Ripard <maxime@cerno.tech>, 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 v4 3/3] media: ov8856: Implement sensor module revision identification Date: Wed, 8 Apr 2020 13:08:16 +0200 [thread overview] Message-ID: <20200408110816.2712841-4-robert.foss@linaro.org> (raw) In-Reply-To: <20200408110816.2712841-1-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 v3: * Actually add module revision 2A - Changes since v2: * Add module revision 2A * Sakari: Remove ov8856_check_revision() * Sakari: Stop EEPROM streaming mode drivers/media/i2c/ov8856.c | 53 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 53 insertions(+) diff --git a/drivers/media/i2c/ov8856.c b/drivers/media/i2c/ov8856.c index 473d3245344a..de0b484b85d0 100644 --- a/drivers/media/i2c/ov8856.c +++ b/drivers/media/i2c/ov8856.c @@ -32,6 +32,19 @@ #define OV8856_MODE_STANDBY 0x00 #define OV8856_MODE_STREAMING 0x01 +/* module revisions */ +#define OV8856_2A_MODULE 0x01 +#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 +1165,46 @@ 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_2A_MODULE ? "2A" : + 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:[~2020-04-08 11:08 UTC|newest] Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-04-08 11:08 [PATCH v4 0/3] media: ov8856: Add devicetree support Robert Foss 2020-04-08 11:08 ` Robert Foss 2020-04-08 11:08 ` [PATCH v7 1/3] media: dt-bindings: ov8856: Document YAML bindings Robert Foss 2020-04-08 11:08 ` Robert Foss 2020-04-15 16:07 ` Rob Herring 2020-04-15 16:07 ` Rob Herring 2020-04-15 16:21 ` Marco Felsch 2020-04-15 16:21 ` Marco Felsch 2020-04-27 15:13 ` Robert Foss 2020-04-27 15:13 ` Robert Foss 2020-04-28 7:55 ` Maxime Ripard 2020-04-28 7:55 ` Maxime Ripard 2020-04-28 8:25 ` Marco Felsch 2020-04-28 8:25 ` Marco Felsch 2020-04-28 11:51 ` Robert Foss 2020-04-28 11:51 ` Robert Foss 2020-04-27 15:12 ` Robert Foss 2020-04-27 15:12 ` Robert Foss 2020-04-08 11:08 ` [PATCH v4 2/3] media: ov8856: Add devicetree support Robert Foss 2020-04-08 11:08 ` Robert Foss 2020-04-08 11:08 ` Robert Foss [this message] 2020-04-08 11:08 ` [PATCH v4 3/3] media: ov8856: Implement sensor module revision identification Robert Foss
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