From patchwork Thu Jun 2 11:36:42 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Javier Martin X-Patchwork-Id: 843402 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter2.kernel.org (8.14.4/8.14.3) with ESMTP id p52Bavrt023880 for ; Thu, 2 Jun 2011 11:36:58 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933492Ab1FBLgz (ORCPT ); Thu, 2 Jun 2011 07:36:55 -0400 Received: from mail-ww0-f44.google.com ([74.125.82.44]:32903 "EHLO mail-ww0-f44.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933268Ab1FBLgy (ORCPT ); Thu, 2 Jun 2011 07:36:54 -0400 Received: by wwa36 with SMTP id 36so796238wwa.1 for ; Thu, 02 Jun 2011 04:36:52 -0700 (PDT) Received: by 10.227.198.17 with SMTP id em17mr679599wbb.4.1307014612389; Thu, 02 Jun 2011 04:36:52 -0700 (PDT) Received: from localhost.localdomain (242.51.18.95.dynamic.jazztel.es [95.18.51.242]) by mx.google.com with ESMTPS id m8sm336346wbh.28.2011.06.02.04.36.50 (version=TLSv1/SSLv3 cipher=OTHER); Thu, 02 Jun 2011 04:36:51 -0700 (PDT) From: Javier Martin To: linux-media@vger.kernel.org Cc: g.liakhovetski@gmx.de, laurent.pinchart@ideasonboard.com, carlighting@yahoo.co.nz, beagleboard@googlegroups.com, mch_kot@yahoo.com.cn, Javier Martin Subject: [PATCH v7 1/2] Add driver for Aptina (Micron) mt9p031 sensor. Date: Thu, 2 Jun 2011 13:36:42 +0200 Message-Id: <1307014603-22944-1-git-send-email-javier.martin@vista-silicon.com> X-Mailer: git-send-email 1.7.0.4 Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.6 (demeter2.kernel.org [140.211.167.43]); Thu, 02 Jun 2011 11:36:58 +0000 (UTC) This version fixes some cosmetic issues pointed out by Guennadi. Signed-off-by: Javier Martin --- drivers/media/video/Kconfig | 7 + drivers/media/video/Makefile | 1 + drivers/media/video/mt9p031.c | 763 +++++++++++++++++++++++++++++++++++++++++ include/media/mt9p031.h | 23 ++ 4 files changed, 794 insertions(+), 0 deletions(-) create mode 100644 drivers/media/video/mt9p031.c create mode 100644 include/media/mt9p031.h diff --git a/drivers/media/video/Kconfig b/drivers/media/video/Kconfig index 00f51dd..5f851f0 100644 --- a/drivers/media/video/Kconfig +++ b/drivers/media/video/Kconfig @@ -329,6 +329,13 @@ config VIDEO_OV7670 OV7670 VGA camera. It currently only works with the M88ALP01 controller. +config VIDEO_MT9P031 + tristate "Aptina MT9P031 support" + depends on I2C && VIDEO_V4L2 + ---help--- + This is a Video4Linux2 sensor-level driver for the Aptina + (Micron) mt9p031 5 Mpixel camera. + config VIDEO_MT9V011 tristate "Micron mt9v011 sensor support" depends on I2C && VIDEO_V4L2 diff --git a/drivers/media/video/Makefile b/drivers/media/video/Makefile index ace5d8b..912b29b 100644 --- a/drivers/media/video/Makefile +++ b/drivers/media/video/Makefile @@ -65,6 +65,7 @@ obj-$(CONFIG_VIDEO_UPD64083) += upd64083.o obj-$(CONFIG_VIDEO_OV7670) += ov7670.o obj-$(CONFIG_VIDEO_TCM825X) += tcm825x.o obj-$(CONFIG_VIDEO_TVEEPROM) += tveeprom.o +obj-$(CONFIG_VIDEO_MT9P031) += mt9p031.o obj-$(CONFIG_VIDEO_MT9V011) += mt9v011.o obj-$(CONFIG_VIDEO_SR030PC30) += sr030pc30.o obj-$(CONFIG_VIDEO_NOON010PC30) += noon010pc30.o diff --git a/drivers/media/video/mt9p031.c b/drivers/media/video/mt9p031.c new file mode 100644 index 0000000..36c47df --- /dev/null +++ b/drivers/media/video/mt9p031.c @@ -0,0 +1,763 @@ +/* + * Driver for MT9P031 CMOS Image Sensor from Aptina + * + * Copyright (C) 2011, Javier Martin + * + * Copyright (C) 2011, Guennadi Liakhovetski + * + * Based on the MT9V032 driver and Bastian Hecht's code. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include + +#define MT9P031_EXTCLK_FREQ 20000000 + +#define MT9P031_CHIP_VERSION 0x00 +#define MT9P031_CHIP_VERSION_VALUE 0x1801 +#define MT9P031_ROW_START 0x01 +#define MT9P031_ROW_START_MIN 1 +#define MT9P031_ROW_START_MAX 2004 +#define MT9P031_ROW_START_DEF 54 +#define MT9P031_COLUMN_START 0x02 +#define MT9P031_COLUMN_START_MIN 1 +#define MT9P031_COLUMN_START_MAX 2750 +#define MT9P031_COLUMN_START_DEF 16 +#define MT9P031_WINDOW_HEIGHT 0x03 +#define MT9P031_WINDOW_HEIGHT_MIN 2 +#define MT9P031_WINDOW_HEIGHT_MAX 2003 +#define MT9P031_WINDOW_HEIGHT_DEF 2003 +#define MT9P031_WINDOW_WIDTH 0x04 +#define MT9P031_WINDOW_WIDTH_MIN 18 +#define MT9P031_WINDOW_WIDTH_MAX 2751 +#define MT9P031_WINDOW_WIDTH_DEF 2751 +#define MT9P031_H_BLANKING 0x05 +#define MT9P031_H_BLANKING_VALUE 0 +#define MT9P031_V_BLANKING 0x06 +#define MT9P031_V_BLANKING_VALUE 25 +#define MT9P031_OUTPUT_CONTROL 0x07 +#define MT9P031_OUTPUT_CONTROL_CEN 2 +#define MT9P031_OUTPUT_CONTROL_SYN 1 +#define MT9P031_SHUTTER_WIDTH_UPPER 0x08 +#define MT9P031_SHUTTER_WIDTH 0x09 +#define MT9P031_PLL_CONTROL 0x10 +#define MT9P031_PLL_CONTROL_PWROFF 0x0050 +#define MT9P031_PLL_CONTROL_PWRON 0x0051 +#define MT9P031_PLL_CONTROL_USEPLL 0x0052 +#define MT9P031_PLL_CONFIG_1 0x11 +#define MT9P031_PLL_CONFIG_1_M_48MHZ 0x5000 +#define MT9P031_PLL_CONFIG_1_N_48MHZ 0x05 +#define MT9P031_PLL_CONFIG_1_M_96MHZ 0x3600 +#define MT9P031_PLL_CONFIG_1_N_96MHZ 0x05 +#define MT9P031_PLL_CONFIG_2 0x12 +#define MT9P031_PLL_CONFIG_2_P1_48MHZ 5 +#define MT9P031_PLL_CONFIG_2_P1_96MHZ 2 +#define MT9P031_PIXEL_CLOCK_CONTROL 0x0a +#define MT9P031_FRAME_RESTART 0x0b +#define MT9P031_SHUTTER_DELAY 0x0c +#define MT9P031_RST 0x0d +#define MT9P031_RST_ENABLE 1 +#define MT9P031_RST_DISABLE 0 +#define MT9P031_READ_MODE_1 0x1e +#define MT9P031_READ_MODE_2 0x20 +#define MT9P031_READ_MODE_2_ROW_MIR 0x8000 +#define MT9P031_READ_MODE_2_COL_MIR 0x4000 +#define MT9P031_ROW_ADDRESS_MODE 0x22 +#define MT9P031_COLUMN_ADDRESS_MODE 0x23 +#define MT9P031_GLOBAL_GAIN 0x35 + +struct mt9p031 { + struct v4l2_subdev subdev; + struct media_pad pad; + struct v4l2_rect rect; /* Sensor window */ + struct v4l2_mbus_framefmt format; + struct mt9p031_platform_data *pdata; + struct mutex power_lock; /* lock to protect power_count */ + int power_count; + u16 xskip; + u16 yskip; + /* cache register values */ + u16 output_control; +}; + +static struct mt9p031 *to_mt9p031(const struct i2c_client *client) +{ + return container_of(i2c_get_clientdata(client), struct mt9p031, subdev); +} + +static int reg_read(struct i2c_client *client, const u8 reg) +{ + s32 data = i2c_smbus_read_word_data(client, reg); + return data < 0 ? data : swab16(data); +} + +static int reg_write(struct i2c_client *client, const u8 reg, + const u16 data) +{ + return i2c_smbus_write_word_data(client, reg, swab16(data)); +} + +static int mt9p031_set_output_control(struct mt9p031 *mt9p031, u16 clear, + u16 set) +{ + struct i2c_client *client = v4l2_get_subdevdata(&mt9p031->subdev); + u16 value = (mt9p031->output_control & ~clear) | set; + int ret; + + ret = reg_write(client, MT9P031_OUTPUT_CONTROL, value); + if (ret < 0) + return ret; + mt9p031->output_control = value; + return 0; +} + +static int mt9p031_reset(struct i2c_client *client) +{ + struct mt9p031 *mt9p031 = to_mt9p031(client); + int ret; + + /* Disable chip output, synchronous option update */ + ret = reg_write(client, MT9P031_RST, MT9P031_RST_ENABLE); + if (ret < 0) + return ret; + ret = reg_write(client, MT9P031_RST, MT9P031_RST_DISABLE); + if (ret < 0) + return ret; + return mt9p031_set_output_control(mt9p031, + MT9P031_OUTPUT_CONTROL_CEN, 0); +} + +static int mt9p031_power_on(struct mt9p031 *mt9p031) +{ + struct i2c_client *client = v4l2_get_subdevdata(&mt9p031->subdev); + int ret; + + /* Ensure RESET_BAR is low */ + if (mt9p031->pdata->reset) { + mt9p031->pdata->reset(&mt9p031->subdev, 1); + msleep(1); + } + /* Emable clock */ + if (mt9p031->pdata->set_xclk) + mt9p031->pdata->set_xclk(&mt9p031->subdev, MT9P031_EXTCLK_FREQ); + /* Now RESET_BAR must be high */ + if (mt9p031->pdata->reset) { + mt9p031->pdata->reset(&mt9p031->subdev, 0); + msleep(1); + } + /* soft reset */ + ret = mt9p031_reset(client); + if (ret < 0) { + dev_err(&client->dev, "Failed to reset the camera\n"); + return ret; + } + return 0; +} + +static void mt9p031_power_off(struct mt9p031 *mt9p031) +{ + if (mt9p031->pdata->reset) { + mt9p031->pdata->reset(&mt9p031->subdev, 1); + msleep(1); + } + if (mt9p031->pdata->set_xclk) + mt9p031->pdata->set_xclk(&mt9p031->subdev, 0); +} + +static int mt9p031_enum_mbus_code(struct v4l2_subdev *sd, + struct v4l2_subdev_fh *fh, + struct v4l2_subdev_mbus_code_enum *code) +{ + struct mt9p031 *mt9p031 = container_of(sd, struct mt9p031, subdev); + + if (code->pad || code->index) + return -EINVAL; + + code->code = mt9p031->format.code; + return 0; +} + +static struct v4l2_mbus_framefmt *mt9p031_get_pad_format( + struct mt9p031 *mt9p031, + struct v4l2_subdev_fh *fh, + unsigned int pad, u32 which) +{ + switch (which) { + case V4L2_SUBDEV_FORMAT_TRY: + return v4l2_subdev_get_try_format(fh, pad); + case V4L2_SUBDEV_FORMAT_ACTIVE: + return &mt9p031->format; + default: + return NULL; + } +} + +static struct v4l2_rect *mt9p031_get_pad_crop(struct mt9p031 *mt9p031, + struct v4l2_subdev_fh *fh, unsigned int pad, u32 which) +{ + switch (which) { + case V4L2_SUBDEV_FORMAT_TRY: + return v4l2_subdev_get_try_crop(fh, pad); + case V4L2_SUBDEV_FORMAT_ACTIVE: + return &mt9p031->rect; + default: + return NULL; + } +} + +static int mt9p031_get_crop(struct v4l2_subdev *sd, + struct v4l2_subdev_fh *fh, + struct v4l2_subdev_crop *crop) +{ + struct mt9p031 *mt9p031 = container_of(sd, struct mt9p031, subdev); + struct v4l2_rect *rect = mt9p031_get_pad_crop(mt9p031, fh, crop->pad, + crop->which); + if (!rect) + return -EINVAL; + + crop->rect = *rect; + + return 0; +} + +static u16 mt9p031_skip_for_crop(s32 source, s32 *target, s32 max_skip) +{ + unsigned int skip; + + if (source - source / 4 < *target) { + *target = source; + return 1; + } + + skip = DIV_ROUND_CLOSEST(source, *target); + if (skip > max_skip) + skip = max_skip; + *target = 2 * DIV_ROUND_UP(source, 2 * skip); + + return skip; +} + +static int mt9p031_set_params(struct i2c_client *client, + struct v4l2_rect *rect, u16 xskip, u16 yskip) +{ + struct mt9p031 *mt9p031 = to_mt9p031(client); + int ret; + u16 xbin, ybin; + const u16 hblank = MT9P031_H_BLANKING_VALUE, + vblank = MT9P031_V_BLANKING_VALUE; + __s32 left; + + /* + * TODO: Attention! When implementing horizontal flipping, adjust + * alignment according to R2 "Column Start" description in the datasheet + */ + if (xskip & 1) { + xbin = 1; + left = rect->left & ~3; + } else if (xskip & 2) { + xbin = 2; + left = rect->left & ~7; + } else { + xbin = 4; + left = rect->left & ~15; + } + ybin = min(yskip, (u16)4); + + /* Disable register update, reconfigure atomically */ + ret = mt9p031_set_output_control(mt9p031, 0, + MT9P031_OUTPUT_CONTROL_SYN); + if (ret < 0) + return ret; + + dev_dbg(&client->dev, "skip %u:%u, rect %ux%u@%u:%u\n", + xskip, yskip, rect->width, rect->height, rect->left, rect->top); + + /* Blanking and start values - default... */ + ret = reg_write(client, MT9P031_H_BLANKING, hblank); + if (ret < 0) + return ret; + ret = reg_write(client, MT9P031_V_BLANKING, vblank); + if (ret < 0) + return ret; + + ret = reg_write(client, MT9P031_COLUMN_ADDRESS_MODE, + ((xbin - 1) << 4) | (xskip - 1)); + if (ret < 0) + return ret; + ret = reg_write(client, MT9P031_ROW_ADDRESS_MODE, + ((ybin - 1) << 4) | (yskip - 1)); + if (ret < 0) + return ret; + + dev_dbg(&client->dev, "new physical left %u, top %u\n", + rect->left, rect->top); + + ret = reg_write(client, MT9P031_COLUMN_START, + rect->left); + if (ret < 0) + return ret; + ret = reg_write(client, MT9P031_ROW_START, + rect->top); + if (ret < 0) + return ret; + + ret = reg_write(client, MT9P031_WINDOW_WIDTH, + rect->width - 1); + if (ret < 0) + return ret; + ret = reg_write(client, MT9P031_WINDOW_HEIGHT, + rect->height - 1); + if (ret < 0) + return ret; + + /* Re-enable register update, commit all changes */ + ret = mt9p031_set_output_control(mt9p031, + MT9P031_OUTPUT_CONTROL_SYN, 0); + if (ret < 0) + return ret; + + mt9p031->xskip = xskip; + mt9p031->yskip = yskip; + return ret; +} + +static int mt9p031_set_crop(struct v4l2_subdev *sd, + struct v4l2_subdev_fh *fh, + struct v4l2_subdev_crop *crop) +{ + struct mt9p031 *mt9p031 = container_of(sd, struct mt9p031, subdev); + struct v4l2_mbus_framefmt *f; + struct v4l2_rect *c; + struct v4l2_rect rect; + u16 xskip, yskip; + s32 width, height; + + dev_dbg(mt9p031->subdev.v4l2_dev->dev, "%s(%ux%u@%u:%u : %u)\n", + __func__, crop->rect.width, crop->rect.height, + crop->rect.left, crop->rect.top, crop->which); + + /* + * Clamp the crop rectangle boundaries and align them to a multiple of 2 + * pixels. + */ + rect.width = ALIGN(clamp(crop->rect.width, + MT9P031_WINDOW_WIDTH_MIN, + MT9P031_WINDOW_WIDTH_MAX), 2); + rect.height = ALIGN(clamp(crop->rect.height, + MT9P031_WINDOW_HEIGHT_MIN, + MT9P031_WINDOW_HEIGHT_MAX), 2); + rect.left = ALIGN(clamp(crop->rect.left, + MT9P031_COLUMN_START_MIN, + MT9P031_COLUMN_START_MAX), 2); + rect.top = ALIGN(clamp(crop->rect.top, + MT9P031_ROW_START_MIN, + MT9P031_ROW_START_MAX), 2); + + c = mt9p031_get_pad_crop(mt9p031, fh, crop->pad, crop->which); + + if (rect.width != c->width || rect.height != c->height) { + /* + * Reset the output image size if the crop rectangle size has + * been modified. + */ + f = mt9p031_get_pad_format(mt9p031, fh, crop->pad, + crop->which); + width = f->width; + height = f->height; + + xskip = mt9p031_skip_for_crop(rect.width, &width, 7); + yskip = mt9p031_skip_for_crop(rect.height, &height, 8); + } else { + xskip = mt9p031->xskip; + yskip = mt9p031->yskip; + f = NULL; + } + if (f) { + f->width = width; + f->height = height; + } + + *c = rect; + crop->rect = rect; + + mt9p031->xskip = xskip; + mt9p031->yskip = yskip; + mt9p031->rect = *c; + return 0; +} + +static int mt9p031_get_format(struct v4l2_subdev *sd, + struct v4l2_subdev_fh *fh, + struct v4l2_subdev_format *fmt) +{ + struct mt9p031 *mt9p031 = container_of(sd, struct mt9p031, subdev); + + fmt->format = + *mt9p031_get_pad_format(mt9p031, fh, fmt->pad, fmt->which); + return 0; +} + +static u16 mt9p031_skip_for_scale(s32 *source, s32 target, + s32 max_skip, s32 max) +{ + unsigned int skip; + + if (*source - *source / 4 < target) { + *source = target; + return 1; + } + + skip = min(max, *source + target / 2) / target; + if (skip > max_skip) + skip = max_skip; + *source = target * skip; + + return skip; +} + +static int mt9p031_set_format(struct v4l2_subdev *sd, + struct v4l2_subdev_fh *fh, + struct v4l2_subdev_format *format) +{ + struct v4l2_mbus_framefmt *__format; + struct v4l2_rect *__crop, rect; + struct mt9p031 *mt9p031 = container_of(sd, struct mt9p031, subdev); + unsigned int width; + unsigned int height; + u16 xskip, yskip; + + __crop = mt9p031_get_pad_crop(mt9p031, fh, format->pad, format->which); + + width = clamp_t(int, ALIGN(format->format.width, 2), 2, + MT9P031_WINDOW_WIDTH_MAX); + height = clamp_t(int, ALIGN(format->format.height, 2), 2, + MT9P031_WINDOW_HEIGHT_MAX); + + rect.width = __crop->width; + rect.height = __crop->height; + + xskip = mt9p031_skip_for_scale(&rect.width, width, 7, + MT9P031_WINDOW_WIDTH_MAX); + if (rect.width + __crop->left > MT9P031_WINDOW_WIDTH_MAX) + rect.left = (MT9P031_WINDOW_WIDTH_MAX - rect.width) / 2; + else + rect.left = __crop->left; + yskip = mt9p031_skip_for_scale(&rect.height, height, 8, + MT9P031_WINDOW_HEIGHT_MAX); + if (rect.height + __crop->top > MT9P031_WINDOW_HEIGHT_MAX) + rect.top = (MT9P031_WINDOW_HEIGHT_MAX - rect.height) / 2; + else + rect.top = __crop->top; + + dev_dbg(mt9p031->subdev.v4l2_dev->dev, "%s(%ux%u : %u)\n", __func__, + width, height, format->which); + if (__crop) + *__crop = rect; + + __format = mt9p031_get_pad_format(mt9p031, fh, format->pad, + format->which); + __format->width = width; + __format->height = height; + format->format = *__format; + + mt9p031->xskip = xskip; + mt9p031->yskip = yskip; + mt9p031->rect = *__crop; + return 0; +} + +static int mt9p031_pll_enable(struct i2c_client *client) +{ + struct mt9p031 *mt9p031 = to_mt9p031(client); + int ret; + + ret = reg_write(client, MT9P031_PLL_CONTROL, MT9P031_PLL_CONTROL_PWRON); + if (ret < 0) + return ret; + + /* Always set the maximum frequency allowed by VDD_IO */ + if (mt9p031->pdata->vdd_io == MT9P031_VDD_IO_2V8) { + ret = reg_write(client, MT9P031_PLL_CONFIG_1, + MT9P031_PLL_CONFIG_1_M_96MHZ | + MT9P031_PLL_CONFIG_1_N_96MHZ); + if (ret < 0) + return ret; + ret = reg_write(client, MT9P031_PLL_CONFIG_2, + MT9P031_PLL_CONFIG_2_P1_96MHZ); + if (ret < 0) + return ret; + } else { + ret = reg_write(client, MT9P031_PLL_CONFIG_1, + MT9P031_PLL_CONFIG_1_M_48MHZ | + MT9P031_PLL_CONFIG_1_N_48MHZ); + if (ret < 0) + return ret; + ret = reg_write(client, MT9P031_PLL_CONFIG_2, + MT9P031_PLL_CONFIG_2_P1_48MHZ); + if (ret < 0) + return ret; + } + mdelay(1); + ret = reg_write(client, MT9P031_PLL_CONTROL, + MT9P031_PLL_CONTROL_PWRON | + MT9P031_PLL_CONTROL_USEPLL); + mdelay(1); + return ret; +} + +static inline int mt9p031_pll_disable(struct i2c_client *client) +{ + return reg_write(client, MT9P031_PLL_CONTROL, + MT9P031_PLL_CONTROL_PWROFF); +} + +static int mt9p031_s_stream(struct v4l2_subdev *sd, int enable) +{ + struct mt9p031 *mt9p031 = container_of(sd, struct mt9p031, subdev); + struct i2c_client *client = v4l2_get_subdevdata(&mt9p031->subdev); + struct v4l2_rect rect = mt9p031->rect; + u16 xskip = mt9p031->xskip; + u16 yskip = mt9p031->yskip; + int ret; + + if (enable) { + ret = mt9p031_set_params(client, &rect, xskip, yskip); + if (ret < 0) + return ret; + /* Switch to master "normal" mode */ + ret = mt9p031_set_output_control(mt9p031, 0, + MT9P031_OUTPUT_CONTROL_CEN); + if (ret < 0) + return ret; + ret = mt9p031_pll_enable(client); + } else { + /* Stop sensor readout */ + ret = mt9p031_set_output_control(mt9p031, + MT9P031_OUTPUT_CONTROL_CEN, 0); + if (ret < 0) + return ret; + ret = mt9p031_pll_disable(client); + } + return ret; +} + +static int mt9p031_video_probe(struct i2c_client *client) +{ + s32 data; + + /* Read out the chip version register */ + data = reg_read(client, MT9P031_CHIP_VERSION); + if (data != MT9P031_CHIP_VERSION_VALUE) { + dev_err(&client->dev, + "No MT9P031 chip detected, register read %x\n", data); + return -ENODEV; + } + + dev_info(&client->dev, "Detected a MT9P031 chip ID %x\n", data); + + return 0; +} + +static int mt9p031_set_power(struct v4l2_subdev *sd, int on) +{ + struct mt9p031 *mt9p031 = container_of(sd, struct mt9p031, subdev); + int ret = 0; + + mutex_lock(&mt9p031->power_lock); + + /* + * If the power count is modified from 0 to != 0 or from != 0 to 0, + * update the power state. + */ + if (mt9p031->power_count == !on) { + if (on) { + ret = mt9p031_power_on(mt9p031); + if (ret) { + dev_err(mt9p031->subdev.v4l2_dev->dev, + "Failed to power on: %d\n", ret); + goto out; + } + } else { + mt9p031_power_off(mt9p031); + } + } + + /* Update the power count. */ + mt9p031->power_count += on ? 1 : -1; + WARN_ON(mt9p031->power_count < 0); + +out: + mutex_unlock(&mt9p031->power_lock); + return ret; +} + +static int mt9p031_registered(struct v4l2_subdev *sd) +{ + struct mt9p031 *mt9p031 = container_of(sd, struct mt9p031, subdev); + struct i2c_client *client = v4l2_get_subdevdata(&mt9p031->subdev); + int ret; + + ret = mt9p031_set_power(&mt9p031->subdev, 1); + if (ret) { + dev_err(&client->dev, + "Failed to power on device: %d\n", ret); + return ret; + } + + ret = mt9p031_video_probe(client); + + mt9p031_set_power(&mt9p031->subdev, 0); + + return ret; +} + +static int mt9p031_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh) +{ + struct mt9p031 *mt9p031; + mt9p031 = container_of(sd, struct mt9p031, subdev); + + mt9p031->rect.width = MT9P031_WINDOW_WIDTH_DEF; + mt9p031->rect.height = MT9P031_WINDOW_HEIGHT_DEF; + mt9p031->rect.left = MT9P031_COLUMN_START_DEF; + mt9p031->rect.top = MT9P031_ROW_START_DEF; + + if (mt9p031->pdata->version == MT9P031_MONOCHROME_VERSION) + mt9p031->format.code = V4L2_MBUS_FMT_Y12_1X12; + else + mt9p031->format.code = V4L2_MBUS_FMT_SGRBG12_1X12; + + mt9p031->format.width = MT9P031_WINDOW_WIDTH_DEF; + mt9p031->format.height = MT9P031_WINDOW_HEIGHT_DEF; + mt9p031->format.field = V4L2_FIELD_NONE; + mt9p031->format.colorspace = V4L2_COLORSPACE_SRGB; + + mt9p031->xskip = 1; + mt9p031->yskip = 1; + return mt9p031_set_power(sd, 1); +} + +static int mt9p031_close(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh) +{ + return mt9p031_set_power(sd, 0); +} + +static struct v4l2_subdev_core_ops mt9p031_subdev_core_ops = { + .s_power = mt9p031_set_power, +}; + +static struct v4l2_subdev_video_ops mt9p031_subdev_video_ops = { + .s_stream = mt9p031_s_stream, +}; + +static struct v4l2_subdev_pad_ops mt9p031_subdev_pad_ops = { + .enum_mbus_code = mt9p031_enum_mbus_code, + .get_fmt = mt9p031_get_format, + .set_fmt = mt9p031_set_format, + .get_crop = mt9p031_get_crop, + .set_crop = mt9p031_set_crop, +}; + +static struct v4l2_subdev_ops mt9p031_subdev_ops = { + .core = &mt9p031_subdev_core_ops, + .video = &mt9p031_subdev_video_ops, + .pad = &mt9p031_subdev_pad_ops, +}; + +static const struct v4l2_subdev_internal_ops mt9p031_subdev_internal_ops = { + .registered = mt9p031_registered, + .open = mt9p031_open, + .close = mt9p031_close, +}; + +static int mt9p031_probe(struct i2c_client *client, + const struct i2c_device_id *did) +{ + int ret; + struct mt9p031 *mt9p031; + struct mt9p031_platform_data *pdata = client->dev.platform_data; + struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent); + + if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) { + dev_warn(&adapter->dev, + "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n"); + return -EIO; + } + + mt9p031 = kzalloc(sizeof(struct mt9p031), GFP_KERNEL); + if (!mt9p031) + return -ENOMEM; + + mutex_init(&mt9p031->power_lock); + v4l2_i2c_subdev_init(&mt9p031->subdev, client, &mt9p031_subdev_ops); + mt9p031->subdev.internal_ops = &mt9p031_subdev_internal_ops; + + mt9p031->pdata = pdata; + + mt9p031->pad.flags = MEDIA_PAD_FL_SOURCE; + ret = media_entity_init(&mt9p031->subdev.entity, 1, &mt9p031->pad, 0); + if (ret) + return ret; + + mt9p031->subdev.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; + + return 0; +} + +static int mt9p031_remove(struct i2c_client *client) +{ + struct v4l2_subdev *sd = i2c_get_clientdata(client); + struct mt9p031 *mt9p031 = container_of(sd, struct mt9p031, subdev); + + v4l2_device_unregister_subdev(sd); + media_entity_cleanup(&sd->entity); + kfree(mt9p031); + + return 0; +} + +static const struct i2c_device_id mt9p031_id[] = { + { "mt9p031", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, mt9p031_id); + +static struct i2c_driver mt9p031_i2c_driver = { + .driver = { + .name = "mt9p031", + }, + .probe = mt9p031_probe, + .remove = mt9p031_remove, + .id_table = mt9p031_id, +}; + +static int __init mt9p031_mod_init(void) +{ + return i2c_add_driver(&mt9p031_i2c_driver); +} + +static void __exit mt9p031_mod_exit(void) +{ + i2c_del_driver(&mt9p031_i2c_driver); +} + +module_init(mt9p031_mod_init); +module_exit(mt9p031_mod_exit); + +MODULE_DESCRIPTION("Aptina MT9P031 Camera driver"); +MODULE_AUTHOR("Bastian Hecht "); +MODULE_LICENSE("GPL v2"); diff --git a/include/media/mt9p031.h b/include/media/mt9p031.h new file mode 100644 index 0000000..2026b83 --- /dev/null +++ b/include/media/mt9p031.h @@ -0,0 +1,23 @@ +#ifndef MT9P031_H +#define MT9P031_H + +struct v4l2_subdev; + +enum { + MT9P031_COLOR_VERSION, + MT9P031_MONOCHROME_VERSION, +}; + +enum { + MT9P031_VDD_IO_1V8, + MT9P031_VDD_IO_2V8, +}; + +struct mt9p031_platform_data { + int (*set_xclk)(struct v4l2_subdev *subdev, int hz); + int (*reset)(struct v4l2_subdev *subdev, int active); + int vdd_io; /* MT9P031_VDD_IO_1V8 or MT9P031_VDD_IO_2V8 */ + int version; /* MT9P031_COLOR_VERSION or MT9P031_MONOCHROME_VERSION */ +}; + +#endif