From e958e27adeade7fa085dd396a8a0dfaef7e338c1 Mon Sep 17 00:00:00 2001 From: Sascha Hauer Date: Fri, 13 Mar 2009 06:08:20 -0300 Subject: [PATCH] V4L/DVB (11033): mt9v022: allow setting of bus width from board code This patch removes the phytec specific setting of the bus width and switches to the more generic query_bus_param/set_bus_param hooks Signed-off-by: Sascha Hauer Signed-off-by: Guennadi Liakhovetski Signed-off-by: Mauro Carvalho Chehab --- drivers/media/video/Kconfig | 7 -- drivers/media/video/mt9v022.c | 141 ++++++++++------------------------ 2 files changed, 42 insertions(+), 106 deletions(-) diff --git a/drivers/media/video/Kconfig b/drivers/media/video/Kconfig index 24dfb39a6ccb..d5ddb819a961 100644 --- a/drivers/media/video/Kconfig +++ b/drivers/media/video/Kconfig @@ -726,13 +726,6 @@ config SOC_CAMERA_MT9V022 help This driver supports MT9V022 cameras from Micron -config MT9V022_PCA9536_SWITCH - bool "pca9536 datawidth switch for mt9v022" - depends on SOC_CAMERA_MT9V022 && GENERIC_GPIO - help - Select this if your MT9V022 camera uses a PCA9536 I2C GPIO - extender to switch between 8 and 10 bit datawidth modes - config SOC_CAMERA_TW9910 tristate "tw9910 support" depends on SOC_CAMERA && I2C diff --git a/drivers/media/video/mt9v022.c b/drivers/media/video/mt9v022.c index 3871d4a2d8ff..4d3b4813c322 100644 --- a/drivers/media/video/mt9v022.c +++ b/drivers/media/video/mt9v022.c @@ -13,7 +13,6 @@ #include #include #include -#include #include #include @@ -89,9 +88,7 @@ struct mt9v022 { struct i2c_client *client; struct soc_camera_device icd; int model; /* V4L2_IDENT_MT9V022* codes from v4l2-chip-ident.h */ - int switch_gpio; u16 chip_control; - unsigned char datawidth; }; static int reg_read(struct soc_camera_device *icd, const u8 reg) @@ -209,66 +206,6 @@ static int mt9v022_stop_capture(struct soc_camera_device *icd) return 0; } -static int bus_switch_request(struct mt9v022 *mt9v022, struct soc_camera_link *icl) -{ -#ifdef CONFIG_MT9V022_PCA9536_SWITCH - int ret; - unsigned int gpio = icl->gpio; - - if (gpio_is_valid(gpio)) { - /* We have a data bus switch. */ - ret = gpio_request(gpio, "mt9v022"); - if (ret < 0) { - dev_err(&mt9v022->client->dev, "Cannot get GPIO %u\n", gpio); - return ret; - } - - ret = gpio_direction_output(gpio, 0); - if (ret < 0) { - dev_err(&mt9v022->client->dev, - "Cannot set GPIO %u to output\n", gpio); - gpio_free(gpio); - return ret; - } - } - - mt9v022->switch_gpio = gpio; -#else - mt9v022->switch_gpio = -EINVAL; -#endif - return 0; -} - -static void bus_switch_release(struct mt9v022 *mt9v022) -{ -#ifdef CONFIG_MT9V022_PCA9536_SWITCH - if (gpio_is_valid(mt9v022->switch_gpio)) - gpio_free(mt9v022->switch_gpio); -#endif -} - -static int bus_switch_act(struct mt9v022 *mt9v022, int go8bit) -{ -#ifdef CONFIG_MT9V022_PCA9536_SWITCH - if (!gpio_is_valid(mt9v022->switch_gpio)) - return -ENODEV; - - gpio_set_value_cansleep(mt9v022->switch_gpio, go8bit); - return 0; -#else - return -ENODEV; -#endif -} - -static int bus_switch_possible(struct mt9v022 *mt9v022) -{ -#ifdef CONFIG_MT9V022_PCA9536_SWITCH - return gpio_is_valid(mt9v022->switch_gpio); -#else - return 0; -#endif -} - static int mt9v022_set_bus_param(struct soc_camera_device *icd, unsigned long flags) { @@ -282,19 +219,17 @@ static int mt9v022_set_bus_param(struct soc_camera_device *icd, if (!is_power_of_2(width_flag)) return -EINVAL; - if ((mt9v022->datawidth != 10 && (width_flag == SOCAM_DATAWIDTH_10)) || - (mt9v022->datawidth != 9 && (width_flag == SOCAM_DATAWIDTH_9)) || - (mt9v022->datawidth != 8 && (width_flag == SOCAM_DATAWIDTH_8))) { - /* Well, we actually only can do 10 or 8 bits... */ - if (width_flag == SOCAM_DATAWIDTH_9) - return -EINVAL; - - ret = bus_switch_act(mt9v022, - width_flag == SOCAM_DATAWIDTH_8); - if (ret < 0) + if (icl->set_bus_param) { + ret = icl->set_bus_param(icl, width_flag); + if (ret) return ret; - - mt9v022->datawidth = width_flag == SOCAM_DATAWIDTH_8 ? 8 : 10; + } else { + /* + * Without board specific bus width settings we only support the + * sensors native bus width + */ + if (width_flag != SOCAM_DATAWIDTH_10) + return -EINVAL; } flags = soc_camera_apply_sensor_flags(icl, flags); @@ -328,10 +263,14 @@ static int mt9v022_set_bus_param(struct soc_camera_device *icd, static unsigned long mt9v022_query_bus_param(struct soc_camera_device *icd) { struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd); - unsigned int width_flag = SOCAM_DATAWIDTH_10; + struct soc_camera_link *icl = mt9v022->client->dev.platform_data; + unsigned int width_flag; - if (bus_switch_possible(mt9v022)) - width_flag |= SOCAM_DATAWIDTH_8; + if (icl->query_bus_param) + width_flag = icl->query_bus_param(icl) & + SOCAM_DATAWIDTH_MASK; + else + width_flag = SOCAM_DATAWIDTH_10; return SOCAM_PCLK_SAMPLE_RISING | SOCAM_PCLK_SAMPLE_FALLING | SOCAM_HSYNC_ACTIVE_HIGH | SOCAM_HSYNC_ACTIVE_LOW | @@ -715,6 +654,7 @@ static int mt9v022_video_probe(struct soc_camera_device *icd) struct soc_camera_link *icl = mt9v022->client->dev.platform_data; s32 data; int ret; + unsigned long flags; if (!icd->dev.parent || to_soc_camera_host(icd->dev.parent)->nr != icd->iface) @@ -748,22 +688,36 @@ static int mt9v022_video_probe(struct soc_camera_device *icd) ret = reg_write(icd, MT9V022_PIXEL_OPERATION_MODE, 4 | 0x11); mt9v022->model = V4L2_IDENT_MT9V022IX7ATC; icd->formats = mt9v022_colour_formats; - if (gpio_is_valid(icl->gpio)) - icd->num_formats = ARRAY_SIZE(mt9v022_colour_formats); - else - icd->num_formats = 1; } else { ret = reg_write(icd, MT9V022_PIXEL_OPERATION_MODE, 0x11); mt9v022->model = V4L2_IDENT_MT9V022IX7ATM; icd->formats = mt9v022_monochrome_formats; - if (gpio_is_valid(icl->gpio)) - icd->num_formats = ARRAY_SIZE(mt9v022_monochrome_formats); - else - icd->num_formats = 1; } - if (!ret) - ret = soc_camera_video_start(icd); + if (ret < 0) + goto eisis; + + icd->num_formats = 0; + + /* + * This is a 10bit sensor, so by default we only allow 10bit. + * The platform may support different bus widths due to + * different routing of the data lines. + */ + if (icl->query_bus_param) + flags = icl->query_bus_param(icl); + else + flags = SOCAM_DATAWIDTH_10; + + if (flags & SOCAM_DATAWIDTH_10) + icd->num_formats++; + else + icd->formats++; + + if (flags & SOCAM_DATAWIDTH_8) + icd->num_formats++; + + ret = soc_camera_video_start(icd); if (ret < 0) goto eisis; @@ -828,14 +782,6 @@ static int mt9v022_probe(struct i2c_client *client, icd->height_max = 480; icd->y_skip_top = 1; icd->iface = icl->bus_id; - /* Default datawidth - this is the only width this camera (normally) - * supports. It is only with extra logic that it can support - * other widths. Therefore it seems to be a sensible default. */ - mt9v022->datawidth = 10; - - ret = bus_switch_request(mt9v022, icl); - if (ret) - goto eswinit; ret = soc_camera_device_register(icd); if (ret) @@ -844,8 +790,6 @@ static int mt9v022_probe(struct i2c_client *client, return 0; eisdr: - bus_switch_release(mt9v022); -eswinit: kfree(mt9v022); return ret; } @@ -855,7 +799,6 @@ static int mt9v022_remove(struct i2c_client *client) struct mt9v022 *mt9v022 = i2c_get_clientdata(client); soc_camera_device_unregister(&mt9v022->icd); - bus_switch_release(mt9v022); kfree(mt9v022); return 0; -- 2.20.1