diff options
| -rw-r--r-- | drivers/media/video/Kconfig | 7 | ||||
| -rw-r--r-- | drivers/media/video/mt9m001.c | 143 |
2 files changed, 40 insertions, 110 deletions
diff --git a/drivers/media/video/Kconfig b/drivers/media/video/Kconfig index 534a022c4d1b..24dfb39a6ccb 100644 --- a/drivers/media/video/Kconfig +++ b/drivers/media/video/Kconfig @@ -707,13 +707,6 @@ config SOC_CAMERA_MT9M001 This driver supports MT9M001 cameras from Micron, monochrome and colour models. -config MT9M001_PCA9536_SWITCH - bool "pca9536 datawidth switch for mt9m001" - depends on SOC_CAMERA_MT9M001 && GENERIC_GPIO - help - Select this if your MT9M001 camera uses a PCA9536 I2C GPIO - extender to switch between 8 and 10 bit datawidth modes - config SOC_CAMERA_MT9M111 tristate "mt9m111 and mt9m112 support" depends on SOC_CAMERA && I2C diff --git a/drivers/media/video/mt9m001.c b/drivers/media/video/mt9m001.c index a6703d25227f..fa7e5093edeb 100644 --- a/drivers/media/video/mt9m001.c +++ b/drivers/media/video/mt9m001.c @@ -12,7 +12,6 @@ #include <linux/slab.h> #include <linux/i2c.h> #include <linux/log2.h> -#include <linux/gpio.h> #include <media/v4l2-common.h> #include <media/v4l2-chip-ident.h> @@ -73,9 +72,7 @@ struct mt9m001 { struct i2c_client *client; struct soc_camera_device icd; int model; /* V4L2_IDENT_MT9M001* codes from v4l2-chip-ident.h */ - int switch_gpio; unsigned char autoexposure; - unsigned char datawidth; }; static int reg_read(struct soc_camera_device *icd, const u8 reg) @@ -181,92 +178,28 @@ static int mt9m001_stop_capture(struct soc_camera_device *icd) return 0; } -static int bus_switch_request(struct mt9m001 *mt9m001, - struct soc_camera_link *icl) -{ -#ifdef CONFIG_MT9M001_PCA9536_SWITCH - int ret; - unsigned int gpio = icl->gpio; - - if (gpio_is_valid(gpio)) { - /* We have a data bus switch. */ - ret = gpio_request(gpio, "mt9m001"); - if (ret < 0) { - dev_err(&mt9m001->client->dev, "Cannot get GPIO %u\n", - gpio); - return ret; - } - - ret = gpio_direction_output(gpio, 0); - if (ret < 0) { - dev_err(&mt9m001->client->dev, - "Cannot set GPIO %u to output\n", gpio); - gpio_free(gpio); - return ret; - } - } - - mt9m001->switch_gpio = gpio; -#else - mt9m001->switch_gpio = -EINVAL; -#endif - return 0; -} - -static void bus_switch_release(struct mt9m001 *mt9m001) -{ -#ifdef CONFIG_MT9M001_PCA9536_SWITCH - if (gpio_is_valid(mt9m001->switch_gpio)) - gpio_free(mt9m001->switch_gpio); -#endif -} - -static int bus_switch_act(struct mt9m001 *mt9m001, int go8bit) -{ -#ifdef CONFIG_MT9M001_PCA9536_SWITCH - if (!gpio_is_valid(mt9m001->switch_gpio)) - return -ENODEV; - - gpio_set_value_cansleep(mt9m001->switch_gpio, go8bit); - return 0; -#else - return -ENODEV; -#endif -} - -static int bus_switch_possible(struct mt9m001 *mt9m001) -{ -#ifdef CONFIG_MT9M001_PCA9536_SWITCH - return gpio_is_valid(mt9m001->switch_gpio); -#else - return 0; -#endif -} - static int mt9m001_set_bus_param(struct soc_camera_device *icd, unsigned long flags) { struct mt9m001 *mt9m001 = container_of(icd, struct mt9m001, icd); - unsigned int width_flag = flags & SOCAM_DATAWIDTH_MASK; - int ret; + struct soc_camera_link *icl = mt9m001->client->dev.platform_data; + unsigned long width_flag = flags & SOCAM_DATAWIDTH_MASK; - /* Flags validity verified in test_bus_param */ + /* Only one width bit may be set */ + if (!is_power_of_2(width_flag)) + return -EINVAL; - if ((mt9m001->datawidth != 10 && (width_flag == SOCAM_DATAWIDTH_10)) || - (mt9m001->datawidth != 9 && (width_flag == SOCAM_DATAWIDTH_9)) || - (mt9m001->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(mt9m001, - width_flag == SOCAM_DATAWIDTH_8); - if (ret < 0) - return ret; + if (icl->set_bus_param) + return icl->set_bus_param(icl, width_flag); - mt9m001->datawidth = width_flag == SOCAM_DATAWIDTH_8 ? 8 : 10; - } + /* + * Without board specific bus width settings we only support the + * sensors native bus width + */ + if (width_flag == SOCAM_DATAWIDTH_10) + return 0; - return 0; + return -EINVAL; } static unsigned long mt9m001_query_bus_param(struct soc_camera_device *icd) @@ -274,12 +207,14 @@ static unsigned long mt9m001_query_bus_param(struct soc_camera_device *icd) struct mt9m001 *mt9m001 = container_of(icd, struct mt9m001, icd); struct soc_camera_link *icl = mt9m001->client->dev.platform_data; /* MT9M001 has all capture_format parameters fixed */ - unsigned long flags = SOCAM_DATAWIDTH_10 | SOCAM_PCLK_SAMPLE_RISING | + unsigned long flags = SOCAM_PCLK_SAMPLE_RISING | SOCAM_HSYNC_ACTIVE_HIGH | SOCAM_VSYNC_ACTIVE_HIGH | SOCAM_DATA_ACTIVE_HIGH | SOCAM_MASTER; - if (bus_switch_possible(mt9m001)) - flags |= SOCAM_DATAWIDTH_8; + if (icl->query_bus_param) + flags |= icl->query_bus_param(icl) & SOCAM_DATAWIDTH_MASK; + else + flags |= SOCAM_DATAWIDTH_10; return soc_camera_apply_sensor_flags(icl, flags); } @@ -598,6 +533,7 @@ static int mt9m001_video_probe(struct soc_camera_device *icd) struct soc_camera_link *icl = mt9m001->client->dev.platform_data; s32 data; int ret; + unsigned long flags; /* We must have a parent by now. And it cannot be a wrong one. * So this entire test is completely redundant. */ @@ -618,18 +554,10 @@ static int mt9m001_video_probe(struct soc_camera_device *icd) case 0x8421: mt9m001->model = V4L2_IDENT_MT9M001C12ST; icd->formats = mt9m001_colour_formats; - if (gpio_is_valid(icl->gpio)) - icd->num_formats = ARRAY_SIZE(mt9m001_colour_formats); - else - icd->num_formats = 1; break; case 0x8431: mt9m001->model = V4L2_IDENT_MT9M001C12STM; icd->formats = mt9m001_monochrome_formats; - if (gpio_is_valid(icl->gpio)) - icd->num_formats = ARRAY_SIZE(mt9m001_monochrome_formats); - else - icd->num_formats = 1; break; default: ret = -ENODEV; @@ -638,6 +566,26 @@ static int mt9m001_video_probe(struct soc_camera_device *icd) goto ei2c; } + 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++; + dev_info(&icd->dev, "Detected a MT9M001 chip ID %x (%s)\n", data, data == 0x8431 ? "C12STM" : "C12ST"); @@ -703,18 +651,10 @@ static int mt9m001_probe(struct i2c_client *client, icd->height_max = 1024; 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. */ - mt9m001->datawidth = 10; /* Simulated autoexposure. If enabled, we calculate shutter width * ourselves in the driver based on vertical blanking and frame width */ mt9m001->autoexposure = 1; - ret = bus_switch_request(mt9m001, icl); - if (ret) - goto eswinit; - ret = soc_camera_device_register(icd); if (ret) goto eisdr; @@ -722,8 +662,6 @@ static int mt9m001_probe(struct i2c_client *client, return 0; eisdr: - bus_switch_release(mt9m001); -eswinit: kfree(mt9m001); return ret; } @@ -733,7 +671,6 @@ static int mt9m001_remove(struct i2c_client *client) struct mt9m001 *mt9m001 = i2c_get_clientdata(client); soc_camera_device_unregister(&mt9m001->icd); - bus_switch_release(mt9m001); kfree(mt9m001); return 0; |