diff options
Diffstat (limited to 'drivers/media/i2c/smiapp/smiapp-core.c')
| -rw-r--r-- | drivers/media/i2c/smiapp/smiapp-core.c | 2898 |
1 files changed, 2898 insertions, 0 deletions
diff --git a/drivers/media/i2c/smiapp/smiapp-core.c b/drivers/media/i2c/smiapp/smiapp-core.c new file mode 100644 index 00000000000..e08e588ad24 --- /dev/null +++ b/drivers/media/i2c/smiapp/smiapp-core.c @@ -0,0 +1,2898 @@ +/* + * drivers/media/i2c/smiapp/smiapp-core.c + * + * Generic driver for SMIA/SMIA++ compliant camera modules + * + * Copyright (C) 2010--2012 Nokia Corporation + * Contact: Sakari Ailus <sakari.ailus@maxwell.research.nokia.com> + * + * Based on smiapp driver by Vimarsh Zutshi + * Based on jt8ev1.c by Vimarsh Zutshi + * Based on smia-sensor.c by Tuukka Toivonen <tuukkat76@gmail.com> + * + * 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. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA + * 02110-1301 USA + * + */ + +#include <linux/clk.h> +#include <linux/delay.h> +#include <linux/device.h> +#include <linux/gpio.h> +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/regulator/consumer.h> +#include <linux/v4l2-mediabus.h> +#include <media/v4l2-device.h> + +#include "smiapp.h" + +#define SMIAPP_ALIGN_DIM(dim, flags) \ + ((flags) & V4L2_SEL_FLAG_GE \ + ? ALIGN((dim), 2) \ + : (dim) & ~1) + +/* + * smiapp_module_idents - supported camera modules + */ +static const struct smiapp_module_ident smiapp_module_idents[] = { + SMIAPP_IDENT_L(0x01, 0x022b, -1, "vs6555"), + SMIAPP_IDENT_L(0x01, 0x022e, -1, "vw6558"), + SMIAPP_IDENT_L(0x07, 0x7698, -1, "ovm7698"), + SMIAPP_IDENT_L(0x0b, 0x4242, -1, "smiapp-003"), + SMIAPP_IDENT_L(0x0c, 0x208a, -1, "tcm8330md"), + SMIAPP_IDENT_LQ(0x0c, 0x2134, -1, "tcm8500md", &smiapp_tcm8500md_quirk), + SMIAPP_IDENT_L(0x0c, 0x213e, -1, "et8en2"), + SMIAPP_IDENT_L(0x0c, 0x2184, -1, "tcm8580md"), + SMIAPP_IDENT_LQ(0x0c, 0x560f, -1, "jt8ew9", &smiapp_jt8ew9_quirk), + SMIAPP_IDENT_LQ(0x10, 0x4141, -1, "jt8ev1", &smiapp_jt8ev1_quirk), + SMIAPP_IDENT_LQ(0x10, 0x4241, -1, "imx125es", &smiapp_imx125es_quirk), +}; + +/* + * + * Dynamic Capability Identification + * + */ + +static int smiapp_read_frame_fmt(struct smiapp_sensor *sensor) +{ + struct i2c_client *client = v4l2_get_subdevdata(&sensor->src->sd); + u32 fmt_model_type, fmt_model_subtype, ncol_desc, nrow_desc; + unsigned int i; + int rval; + int line_count = 0; + int embedded_start = -1, embedded_end = -1; + int image_start = 0; + + rval = smiapp_read(sensor, SMIAPP_REG_U8_FRAME_FORMAT_MODEL_TYPE, + &fmt_model_type); + if (rval) + return rval; + + rval = smiapp_read(sensor, SMIAPP_REG_U8_FRAME_FORMAT_MODEL_SUBTYPE, + &fmt_model_subtype); + if (rval) + return rval; + + ncol_desc = (fmt_model_subtype + & SMIAPP_FRAME_FORMAT_MODEL_SUBTYPE_NCOLS_MASK) + >> SMIAPP_FRAME_FORMAT_MODEL_SUBTYPE_NCOLS_SHIFT; + nrow_desc = fmt_model_subtype + & SMIAPP_FRAME_FORMAT_MODEL_SUBTYPE_NROWS_MASK; + + dev_dbg(&client->dev, "format_model_type %s\n", + fmt_model_type == SMIAPP_FRAME_FORMAT_MODEL_TYPE_2BYTE + ? "2 byte" : + fmt_model_type == SMIAPP_FRAME_FORMAT_MODEL_TYPE_4BYTE + ? "4 byte" : "is simply bad"); + + for (i = 0; i < ncol_desc + nrow_desc; i++) { + u32 desc; + u32 pixelcode; + u32 pixels; + char *which; + char *what; + + if (fmt_model_type == SMIAPP_FRAME_FORMAT_MODEL_TYPE_2BYTE) { + rval = smiapp_read( + sensor, + SMIAPP_REG_U16_FRAME_FORMAT_DESCRIPTOR_2(i), + &desc); + if (rval) + return rval; + + pixelcode = + (desc + & SMIAPP_FRAME_FORMAT_DESC_2_PIXELCODE_MASK) + >> SMIAPP_FRAME_FORMAT_DESC_2_PIXELCODE_SHIFT; + pixels = desc & SMIAPP_FRAME_FORMAT_DESC_2_PIXELS_MASK; + } else if (fmt_model_type + == SMIAPP_FRAME_FORMAT_MODEL_TYPE_4BYTE) { + rval = smiapp_read( + sensor, + SMIAPP_REG_U32_FRAME_FORMAT_DESCRIPTOR_4(i), + &desc); + if (rval) + return rval; + + pixelcode = + (desc + & SMIAPP_FRAME_FORMAT_DESC_4_PIXELCODE_MASK) + >> SMIAPP_FRAME_FORMAT_DESC_4_PIXELCODE_SHIFT; + pixels = desc & SMIAPP_FRAME_FORMAT_DESC_4_PIXELS_MASK; + } else { + dev_dbg(&client->dev, + "invalid frame format model type %d\n", + fmt_model_type); + return -EINVAL; + } + + if (i < ncol_desc) + which = "columns"; + else + which = "rows"; + + switch (pixelcode) { + case SMIAPP_FRAME_FORMAT_DESC_PIXELCODE_EMBEDDED: + what = "embedded"; + break; + case SMIAPP_FRAME_FORMAT_DESC_PIXELCODE_DUMMY: + what = "dummy"; + break; + case SMIAPP_FRAME_FORMAT_DESC_PIXELCODE_BLACK: + what = "black"; + break; + case SMIAPP_FRAME_FORMAT_DESC_PIXELCODE_DARK: + what = "dark"; + break; + case SMIAPP_FRAME_FORMAT_DESC_PIXELCODE_VISIBLE: + what = "visible"; + break; + default: + what = "invalid"; + dev_dbg(&client->dev, "pixelcode %d\n", pixelcode); + break; + } + + dev_dbg(&client->dev, "%s pixels: %d %s\n", + what, pixels, which); + + if (i < ncol_desc) + continue; + + /* Handle row descriptors */ + if (pixelcode + == SMIAPP_FRAME_FORMAT_DESC_PIXELCODE_EMBEDDED) { + embedded_start = line_count; + } else { + if (pixelcode == SMIAPP_FRAME_FORMAT_DESC_PIXELCODE_VISIBLE + || pixels >= sensor->limits[SMIAPP_LIMIT_MIN_FRAME_LENGTH_LINES] / 2) + image_start = line_count; + if (embedded_start != -1 && embedded_end == -1) + embedded_end = line_count; + } + line_count += pixels; + } + + if (embedded_start == -1 || embedded_end == -1) { + embedded_start = 0; + embedded_end = 0; + } + + dev_dbg(&client->dev, "embedded data from lines %d to %d\n", + embedded_start, embedded_end); + dev_dbg(&client->dev, "image data starts at line %d\n", image_start); + + return 0; +} + +static int smiapp_pll_configure(struct smiapp_sensor *sensor) +{ + struct smiapp_pll *pll = &sensor->pll; + int rval; + + rval = smiapp_write( + sensor, SMIAPP_REG_U16_VT_PIX_CLK_DIV, pll->vt_pix_clk_div); + if (rval < 0) + return rval; + + rval = smiapp_write( + sensor, SMIAPP_REG_U16_VT_SYS_CLK_DIV, pll->vt_sys_clk_div); + if (rval < 0) + return rval; + + rval = smiapp_write( + sensor, SMIAPP_REG_U16_PRE_PLL_CLK_DIV, pll->pre_pll_clk_div); + if (rval < 0) + return rval; + + rval = smiapp_write( + sensor, SMIAPP_REG_U16_PLL_MULTIPLIER, pll->pll_multiplier); + if (rval < 0) + return rval; + + /* Lane op clock ratio does not apply here. */ + rval = smiapp_write( + sensor, SMIAPP_REG_U32_REQUESTED_LINK_BIT_RATE_MBPS, + DIV_ROUND_UP(pll->op_sys_clk_freq_hz, 1000000 / 256 / 256)); + if (rval < 0 || sensor->minfo.smiapp_profile == SMIAPP_PROFILE_0) + return rval; + + rval = smiapp_write( + sensor, SMIAPP_REG_U16_OP_PIX_CLK_DIV, pll->op_pix_clk_div); + if (rval < 0) + return rval; + + return smiapp_write( + sensor, SMIAPP_REG_U16_OP_SYS_CLK_DIV, pll->op_sys_clk_div); +} + +static int smiapp_pll_update(struct smiapp_sensor *sensor) +{ + struct i2c_client *client = v4l2_get_subdevdata(&sensor->src->sd); + struct smiapp_pll_limits lim = { + .min_pre_pll_clk_div = sensor->limits[SMIAPP_LIMIT_MIN_PRE_PLL_CLK_DIV], + .max_pre_pll_clk_div = sensor->limits[SMIAPP_LIMIT_MAX_PRE_PLL_CLK_DIV], + .min_pll_ip_freq_hz = sensor->limits[SMIAPP_LIMIT_MIN_PLL_IP_FREQ_HZ], + .max_pll_ip_freq_hz = sensor->limits[SMIAPP_LIMIT_MAX_PLL_IP_FREQ_HZ], + .min_pll_multiplier = sensor->limits[SMIAPP_LIMIT_MIN_PLL_MULTIPLIER], + .max_pll_multiplier = sensor->limits[SMIAPP_LIMIT_MAX_PLL_MULTIPLIER], + .min_pll_op_freq_hz = sensor->limits[SMIAPP_LIMIT_MIN_PLL_OP_FREQ_HZ], + .max_pll_op_freq_hz = sensor->limits[SMIAPP_LIMIT_MAX_PLL_OP_FREQ_HZ], + + .min_op_sys_clk_div = sensor->limits[SMIAPP_LIMIT_MIN_OP_SYS_CLK_DIV], + .max_op_sys_clk_div = sensor->limits[SMIAPP_LIMIT_MAX_OP_SYS_CLK_DIV], + .min_op_pix_clk_div = sensor->limits[SMIAPP_LIMIT_MIN_OP_PIX_CLK_DIV], + .max_op_pix_clk_div = sensor->limits[SMIAPP_LIMIT_MAX_OP_PIX_CLK_DIV], + .min_op_sys_clk_freq_hz = sensor->limits[SMIAPP_LIMIT_MIN_OP_SYS_CLK_FREQ_HZ], + .max_op_sys_clk_freq_hz = sensor->limits[SMIAPP_LIMIT_MAX_OP_SYS_CLK_FREQ_HZ], + .min_op_pix_clk_freq_hz = sensor->limits[SMIAPP_LIMIT_MIN_OP_PIX_CLK_FREQ_HZ], + .max_op_pix_clk_freq_hz = sensor->limits[SMIAPP_LIMIT_MAX_OP_PIX_CLK_FREQ_HZ], + + .min_vt_sys_clk_div = sensor->limits[SMIAPP_LIMIT_MIN_VT_SYS_CLK_DIV], + .max_vt_sys_clk_div = sensor->limits[SMIAPP_LIMIT_MAX_VT_SYS_CLK_DIV], + .min_vt_pix_clk_div = sensor->limits[SMIAPP_LIMIT_MIN_VT_PIX_CLK_DIV], + .max_vt_pix_clk_div = sensor->limits[SMIAPP_LIMIT_MAX_VT_PIX_CLK_DIV], + .min_vt_sys_clk_freq_hz = sensor->limits[SMIAPP_LIMIT_MIN_VT_SYS_CLK_FREQ_HZ], + .max_vt_sys_clk_freq_hz = sensor->limits[SMIAPP_LIMIT_MAX_VT_SYS_CLK_FREQ_HZ], + .min_vt_pix_clk_freq_hz = sensor->limits[SMIAPP_LIMIT_MIN_VT_PIX_CLK_FREQ_HZ], + .max_vt_pix_clk_freq_hz = sensor->limits[SMIAPP_LIMIT_MAX_VT_PIX_CLK_FREQ_HZ], + + .min_line_length_pck_bin = sensor->limits[SMIAPP_LIMIT_MIN_LINE_LENGTH_PCK_BIN], + .min_line_length_pck = sensor->limits[SMIAPP_LIMIT_MIN_LINE_LENGTH_PCK], + }; + struct smiapp_pll *pll = &sensor->pll; + int rval; + + memset(&sensor->pll, 0, sizeof(sensor->pll)); + + pll->lanes = sensor->platform_data->lanes; + pll->ext_clk_freq_hz = sensor->platform_data->ext_clk; + + if (sensor->minfo.smiapp_profile == SMIAPP_PROFILE_0) { + /* + * Fill in operational clock divisors limits from the + * video timing ones. On profile 0 sensors the + * requirements regarding them are essentially the + * same as on VT ones. + */ + lim.min_op_sys_clk_div = lim.min_vt_sys_clk_div; + lim.max_op_sys_clk_div = lim.max_vt_sys_clk_div; + lim.min_op_pix_clk_div = lim.min_vt_pix_clk_div; + lim.max_op_pix_clk_div = lim.max_vt_pix_clk_div; + lim.min_op_sys_clk_freq_hz = lim.min_vt_sys_clk_freq_hz; + lim.max_op_sys_clk_freq_hz = lim.max_vt_sys_clk_freq_hz; + lim.min_op_pix_clk_freq_hz = lim.min_vt_pix_clk_freq_hz; + lim.max_op_pix_clk_freq_hz = lim.max_vt_pix_clk_freq_hz; + /* Profile 0 sensors have no separate OP clock branch. */ + pll->flags |= SMIAPP_PLL_FLAG_NO_OP_CLOCKS; + } + + if (smiapp_needs_quirk(sensor, + SMIAPP_QUIRK_FLAG_OP_PIX_CLOCK_PER_LANE)) + pll->flags |= SMIAPP_PLL_FLAG_OP_PIX_CLOCK_PER_LANE; + + pll->binning_horizontal = sensor->binning_horizontal; + pll->binning_vertical = sensor->binning_vertical; + pll->link_freq = + sensor->link_freq->qmenu_int[sensor->link_freq->val]; + pll->scale_m = sensor->scale_m; + pll->scale_n = sensor->limits[SMIAPP_LIMIT_SCALER_N_MIN]; + pll->bits_per_pixel = sensor->csi_format->compressed; + + rval = smiapp_pll_calculate(&client->dev, &lim, pll); + if (rval < 0) + return rval; + + sensor->pixel_rate_parray->cur.val64 = pll->vt_pix_clk_freq_hz; + sensor->pixel_rate_csi->cur.val64 = pll->pixel_rate_csi; + + return 0; +} + + +/* + * + * V4L2 Controls handling + * + */ + +static void __smiapp_update_exposure_limits(struct smiapp_sensor *sensor) +{ + struct v4l2_ctrl *ctrl = sensor->exposure; + int max; + + max = sensor->pixel_array->crop[SMIAPP_PA_PAD_SRC].height + + sensor->vblank->val + - sensor->limits[SMIAPP_LIMIT_COARSE_INTEGRATION_TIME_MAX_MARGIN]; + + ctrl->maximum = max; + if (ctrl->default_value > max) + ctrl->default_value = max; + if (ctrl->val > max) + ctrl->val = max; + if (ctrl->cur.val > max) + ctrl->cur.val = max; +} + +/* + * Order matters. + * + * 1. Bits-per-pixel, descending. + * 2. Bits-per-pixel compressed, descending. + * 3. Pixel order, same as in pixel_order_str. Formats for all four pixel + * orders must be defined. + */ +static const struct smiapp_csi_data_format smiapp_csi_data_formats[] = { + { V4L2_MBUS_FMT_SGRBG12_1X12, 12, 12, SMIAPP_PIXEL_ORDER_GRBG, }, + { V4L2_MBUS_FMT_SRGGB12_1X12, 12, 12, SMIAPP_PIXEL_ORDER_RGGB, }, + { V4L2_MBUS_FMT_SBGGR12_1X12, 12, 12, SMIAPP_PIXEL_ORDER_BGGR, }, + { V4L2_MBUS_FMT_SGBRG12_1X12, 12, 12, SMIAPP_PIXEL_ORDER_GBRG, }, + { V4L2_MBUS_FMT_SGRBG10_1X10, 10, 10, SMIAPP_PIXEL_ORDER_GRBG, }, + { V4L2_MBUS_FMT_SRGGB10_1X10, 10, 10, SMIAPP_PIXEL_ORDER_RGGB, }, + { V4L2_MBUS_FMT_SBGGR10_1X10, 10, 10, SMIAPP_PIXEL_ORDER_BGGR, }, + { V4L2_MBUS_FMT_SGBRG10_1X10, 10, 10, SMIAPP_PIXEL_ORDER_GBRG, }, + { V4L2_MBUS_FMT_SGRBG10_DPCM8_1X8, 10, 8, SMIAPP_PIXEL_ORDER_GRBG, }, + { V4L2_MBUS_FMT_SRGGB10_DPCM8_1X8, 10, 8, SMIAPP_PIXEL_ORDER_RGGB, }, + { V4L2_MBUS_FMT_SBGGR10_DPCM8_1X8, 10, 8, SMIAPP_PIXEL_ORDER_BGGR, }, + { V4L2_MBUS_FMT_SGBRG10_DPCM8_1X8, 10, 8, SMIAPP_PIXEL_ORDER_GBRG, }, + { V4L2_MBUS_FMT_SGRBG8_1X8, 8, 8, SMIAPP_PIXEL_ORDER_GRBG, }, + { V4L2_MBUS_FMT_SRGGB8_1X8, 8, 8, SMIAPP_PIXEL_ORDER_RGGB, }, + { V4L2_MBUS_FMT_SBGGR8_1X8, 8, 8, SMIAPP_PIXEL_ORDER_BGGR, }, + { V4L2_MBUS_FMT_SGBRG8_1X8, 8, 8, SMIAPP_PIXEL_ORDER_GBRG, }, +}; + +const char *pixel_order_str[] = { "GRBG", "RGGB", "BGGR", "GBRG" }; + +#define to_csi_format_idx(fmt) (((unsigned long)(fmt) \ + - (unsigned long)smiapp_csi_data_formats) \ + / sizeof(*smiapp_csi_data_formats)) + +static u32 smiapp_pixel_order(struct smiapp_sensor *sensor) +{ + struct i2c_client *client = v4l2_get_subdevdata(&sensor->src->sd); + int flip = 0; + + if (sensor->hflip) { + if (sensor->hflip->val) + flip |= SMIAPP_IMAGE_ORIENTATION_HFLIP; + + if (sensor->vflip->val) + flip |= SMIAPP_IMAGE_ORIENTATION_VFLIP; + } + + flip ^= sensor->hvflip_inv_mask; + + dev_dbg(&client->dev, "flip %d\n", flip); + return sensor->default_pixel_order ^ flip; +} + +static void smiapp_update_mbus_formats(struct smiapp_sensor *sensor) +{ + struct i2c_client *client = v4l2_get_subdevdata(&sensor->src->sd); + unsigned int csi_format_idx = + to_csi_format_idx(sensor->csi_format) & ~3; + unsigned int internal_csi_format_idx = + to_csi_format_idx(sensor->internal_csi_format) & ~3; + unsigned int pixel_order = smiapp_pixel_order(sensor); + + sensor->mbus_frame_fmts = + sensor->default_mbus_frame_fmts << pixel_order; + sensor->csi_format = + &smiapp_csi_data_formats[csi_format_idx + pixel_order]; + sensor->internal_csi_format = + &smiapp_csi_data_formats[internal_csi_format_idx + + pixel_order]; + + BUG_ON(max(internal_csi_format_idx, csi_format_idx) + pixel_order + >= ARRAY_SIZE(smiapp_csi_data_formats)); + BUG_ON(min(internal_csi_format_idx, csi_format_idx) < 0); + + dev_dbg(&client->dev, "new pixel order %s\n", + pixel_order_str[pixel_order]); +} + +static int smiapp_set_ctrl(struct v4l2_ctrl *ctrl) +{ + struct smiapp_sensor *sensor = + container_of(ctrl->handler, struct smiapp_subdev, ctrl_handler) + ->sensor; + u32 orient = 0; + int exposure; + int rval; + + switch (ctrl->id) { + case V4L2_CID_ANALOGUE_GAIN: + return smiapp_write( + sensor, + SMIAPP_REG_U16_ANALOGUE_GAIN_CODE_GLOBAL, ctrl->val); + + case V4L2_CID_EXPOSURE: + return smiapp_write( + sensor, + SMIAPP_REG_U16_COARSE_INTEGRATION_TIME, ctrl->val); + + case V4L2_CID_HFLIP: + case V4L2_CID_VFLIP: + if (sensor->streaming) + return -EBUSY; + + if (sensor->hflip->val) + orient |= SMIAPP_IMAGE_ORIENTATION_HFLIP; + + if (sensor->vflip->val) + orient |= SMIAPP_IMAGE_ORIENTATION_VFLIP; + + orient ^= sensor->hvflip_inv_mask; + rval = smiapp_write(sensor, + SMIAPP_REG_U8_IMAGE_ORIENTATION, + orient); + if (rval < 0) + return rval; + + smiapp_update_mbus_formats(sensor); + + return 0; + + case V4L2_CID_VBLANK: + exposure = sensor->exposure->val; + + __smiapp_update_exposure_limits(sensor); + + if (exposure > sensor->exposure->maximum) { + sensor->exposure->val = + sensor->exposure->maximum; + rval = smiapp_set_ctrl( + sensor->exposure); + if (rval < 0) + return rval; + } + + return smiapp_write( + sensor, SMIAPP_REG_U16_FRAME_LENGTH_LINES, + sensor->pixel_array->crop[SMIAPP_PA_PAD_SRC].height + + ctrl->val); + + case V4L2_CID_HBLANK: + return smiapp_write( + sensor, SMIAPP_REG_U16_LINE_LENGTH_PCK, + sensor->pixel_array->crop[SMIAPP_PA_PAD_SRC].width + + ctrl->val); + + case V4L2_CID_LINK_FREQ: + if (sensor->streaming) + return -EBUSY; + + return smiapp_pll_update(sensor); + + default: + return -EINVAL; + } +} + +static const struct v4l2_ctrl_ops smiapp_ctrl_ops = { + .s_ctrl = smiapp_set_ctrl, +}; + +static int smiapp_init_controls(struct smiapp_sensor *sensor) +{ + struct i2c_client *client = v4l2_get_subdevdata(&sensor->src->sd); + unsigned int max; + int rval; + + rval = v4l2_ctrl_handler_init(&sensor->pixel_array->ctrl_handler, 7); + if (rval) + return rval; + sensor->pixel_array->ctrl_handler.lock = &sensor->mutex; + + sensor->analog_gain = v4l2_ctrl_new_std( + &sensor->pixel_array->ctrl_handler, &smiapp_ctrl_ops, + V4L2_CID_ANALOGUE_GAIN, + sensor->limits[SMIAPP_LIMIT_ANALOGUE_GAIN_CODE_MIN], + sensor->limits[SMIAPP_LIMIT_ANALOGUE_GAIN_CODE_MAX], + max(sensor->limits[SMIAPP_LIMIT_ANALOGUE_GAIN_CODE_STEP], 1U), + sensor->limits[SMIAPP_LIMIT_ANALOGUE_GAIN_CODE_MIN]); + + /* Exposure limits will be updated soon, use just something here. */ + sensor->exposure = v4l2_ctrl_new_std( + &sensor->pixel_array->ctrl_handler, &smiapp_ctrl_ops, + V4L2_CID_EXPOSURE, 0, 0, 1, 0); + + sensor->hflip = v4l2_ctrl_new_std( + &sensor->pixel_array->ctrl_handler, &smiapp_ctrl_ops, + V4L2_CID_HFLIP, 0, 1, 1, 0); + sensor->vflip = v4l2_ctrl_new_std( + &sensor->pixel_array->ctrl_handler, &smiapp_ctrl_ops, + V4L2_CID_VFLIP, 0, 1, 1, 0); + + sensor->vblank = v4l2_ctrl_new_std( + &sensor->pixel_array->ctrl_handler, &smiapp_ctrl_ops, + V4L2_CID_VBLANK, 0, 1, 1, 0); + + if (sensor->vblank) + sensor->vblank->flags |= V4L2_CTRL_FLAG_UPDATE; + + sensor->hblank = v4l2_ctrl_new_std( + &sensor->pixel_array->ctrl_handler, &smiapp_ctrl_ops, + V4L2_CID_HBLANK, 0, 1, 1, 0); + + if (sensor->hblank) + sensor->hblank->flags |= V4L2_CTRL_FLAG_UPDATE; + + sensor->pixel_rate_parray = v4l2_ctrl_new_std( + &sensor->pixel_array->ctrl_handler, &smiapp_ctrl_ops, + V4L2_CID_PIXEL_RATE, 0, 0, 1, 0); + + if (sensor->pixel_array->ctrl_handler.error) { + dev_err(&client->dev, + "pixel array controls initialization failed (%d)\n", + sensor->pixel_array->ctrl_handler.error); + rval = sensor->pixel_array->ctrl_handler.error; + goto error; + } + + sensor->pixel_array->sd.ctrl_handler = + &sensor->pixel_array->ctrl_handler; + + v4l2_ctrl_cluster(2, &sensor->hflip); + + rval = v4l2_ctrl_handler_init(&sensor->src->ctrl_handler, 0); + if (rval) + goto error; + sensor->src->ctrl_handler.lock = &sensor->mutex; + + for (max = 0; sensor->platform_data->op_sys_clock[max + 1]; max++); + + sensor->link_freq = v4l2_ctrl_new_int_menu( + &sensor->src->ctrl_handler, &smiapp_ctrl_ops, + V4L2_CID_LINK_FREQ, max, 0, + sensor->platform_data->op_sys_clock); + + sensor->pixel_rate_csi = v4l2_ctrl_new_std( + &sensor->src->ctrl_handler, &smiapp_ctrl_ops, + V4L2_CID_PIXEL_RATE, 0, 0, 1, 0); + + if (sensor->src->ctrl_handler.error) { + dev_err(&client->dev, + "src controls initialization failed (%d)\n", + sensor->src->ctrl_handler.error); + rval = sensor->src->ctrl_handler.error; + goto error; + } + + sensor->src->sd.ctrl_handler = + &sensor->src->ctrl_handler; + + return 0; + +error: + v4l2_ctrl_handler_free(&sensor->pixel_array->ctrl_handler); + v4l2_ctrl_handler_free(&sensor->src->ctrl_handler); + + return rval; +} + +static void smiapp_free_controls(struct smiapp_sensor *sensor) +{ + unsigned int i; + + for (i = 0; i < sensor->ssds_used; i++) + v4l2_ctrl_handler_free(&sensor->ssds[i].ctrl_handler); +} + +static int smiapp_get_limits(struct smiapp_sensor *sensor, int const *limit, + unsigned int n) +{ + struct i2c_client *client = v4l2_get_subdevdata(&sensor->src->sd); + unsigned int i; + u32 val; + int rval; + + for (i = 0; i < n; i++) { + rval = smiapp_read( + sensor, smiapp_reg_limits[limit[i]].addr, &val); + if (rval) + return rval; + sensor->limits[limit[i]] = val; + dev_dbg(&client->dev, "0x%8.8x \"%s\" = %d, 0x%x\n", + smiapp_reg_limits[limit[i]].addr, + smiapp_reg_limits[limit[i]].what, val, val); + } + + return 0; +} + +static int smiapp_get_all_limits(struct smiapp_sensor *sensor) +{ + unsigned int i; + int rval; + + for (i = 0; i < SMIAPP_LIMIT_LAST; i++) { + rval = smiapp_get_limits(sensor, &i, 1); + if (rval < 0) + return rval; + } + + if (sensor->limits[SMIAPP_LIMIT_SCALER_N_MIN] == 0) + smiapp_replace_limit(sensor, SMIAPP_LIMIT_SCALER_N_MIN, 16); + + return 0; +} + +static int smiapp_get_limits_binning(struct smiapp_sensor *sensor) +{ + struct i2c_client *client = v4l2_get_subdevdata(&sensor->src->sd); + static u32 const limits[] = { + SMIAPP_LIMIT_MIN_FRAME_LENGTH_LINES_BIN, + SMIAPP_LIMIT_MAX_FRAME_LENGTH_LINES_BIN, + SMIAPP_LIMIT_MIN_LINE_LENGTH_PCK_BIN, + SMIAPP_LIMIT_MAX_LINE_LENGTH_PCK_BIN, + SMIAPP_LIMIT_MIN_LINE_BLANKING_PCK_BIN, + SMIAPP_LIMIT_FINE_INTEGRATION_TIME_MIN_BIN, + SMIAPP_LIMIT_FINE_INTEGRATION_TIME_MAX_MARGIN_BIN, + }; + static u32 const limits_replace[] = { + SMIAPP_LIMIT_MIN_FRAME_LENGTH_LINES, + SMIAPP_LIMIT_MAX_FRAME_LENGTH_LINES, + SMIAPP_LIMIT_MIN_LINE_LENGTH_PCK, + SMIAPP_LIMIT_MAX_LINE_LENGTH_PCK, + SMIAPP_LIMIT_MIN_LINE_BLANKING_PCK, + SMIAPP_LIMIT_FINE_INTEGRATION_TIME_MIN, + SMIAPP_LIMIT_FINE_INTEGRATION_TIME_MAX_MARGIN, + }; + unsigned int i; + int rval; + + if (sensor->limits[SMIAPP_LIMIT_BINNING_CAPABILITY] == + SMIAPP_BINNING_CAPABILITY_NO) { + for (i = 0; i < ARRAY_SIZE(limits); i++) + sensor->limits[limits[i]] = + sensor->limits[limits_replace[i]]; + + return 0; + } + + rval = smiapp_get_limits(sensor, limits, ARRAY_SIZE(limits)); + if (rval < 0) + return rval; + + /* + * Sanity check whether the binning limits are valid. If not, + * use the non-binning ones. + */ + if (sensor->limits[SMIAPP_LIMIT_MIN_FRAME_LENGTH_LINES_BIN] + && sensor->limits[SMIAPP_LIMIT_MIN_LINE_LENGTH_PCK_BIN] + && sensor->limits[SMIAPP_LIMIT_MIN_LINE_BLANKING_PCK_BIN]) + return 0; + + for (i = 0; i < ARRAY_SIZE(limits); i++) { + dev_dbg(&client->dev, + "replace limit 0x%8.8x \"%s\" = %d, 0x%x\n", + smiapp_reg_limits[limits[i]].addr, + smiapp_reg_limits[limits[i]].what, + sensor->limits[limits_replace[i]], + sensor->limits[limits_replace[i]]); + sensor->limits[limits[i]] = + sensor->limits[limits_replace[i]]; + } + + return 0; +} + +static int smiapp_get_mbus_formats(struct smiapp_sensor *sensor) +{ + struct i2c_client *client = v4l2_get_subdevdata(&sensor->src->sd); + unsigned int type, n; + unsigned int i, pixel_order; + int rval; + + rval = smiapp_read( + sensor, SMIAPP_REG_U8_DATA_FORMAT_MODEL_TYPE, &type); + if (rval) + return rval; + + dev_dbg(&client->dev, "data_format_model_type %d\n", type); + + rval = smiapp_read(sensor, SMIAPP_REG_U8_PIXEL_ORDER, + &pixel_order); + if (rval) + return rval; + + if (pixel_order >= ARRAY_SIZE(pixel_order_str)) { + dev_dbg(&client->dev, "bad pixel order %d\n", pixel_order); + return -EINVAL; + } + + dev_dbg(&client->dev, "pixel order %d (%s)\n", pixel_order, + pixel_order_str[pixel_order]); + + switch (type) { + case SMIAPP_DATA_FORMAT_MODEL_TYPE_NORMAL: + n = SMIAPP_DATA_FORMAT_MODEL_TYPE_NORMAL_N; + break; + case SMIAPP_DATA_FORMAT_MODEL_TYPE_EXTENDED: + n = SMIAPP_DATA_FORMAT_MODEL_TYPE_EXTENDED_N; + break; + default: + return -EINVAL; + } + + sensor->default_pixel_order = pixel_order; + sensor->mbus_frame_fmts = 0; + + for (i = 0; i < n; i++) { + unsigned int fmt, j; + + rval = smiapp_read( + sensor, + SMIAPP_REG_U16_DATA_FORMAT_DESCRIPTOR(i), &fmt); + if (rval) + return rval; + + dev_dbg(&client->dev, "bpp %d, compressed %d\n", + fmt >> 8, (u8)fmt); + + for (j = 0; j < ARRAY_SIZE(smiapp_csi_data_formats); j++) { + const struct smiapp_csi_data_format *f = + &smiapp_csi_data_formats[j]; + + if (f->pixel_order != SMIAPP_PIXEL_ORDER_GRBG) + continue; + + if (f->width != fmt >> 8 || f->compressed != (u8)fmt) + continue; + + dev_dbg(&client->dev, "jolly good! %d\n", j); + + sensor->default_mbus_frame_fmts |= 1 << j; + if (!sensor->csi_format + || f->width > sensor->csi_format->width + || (f->width == sensor->csi_format->width + && f->compressed + > sensor->csi_format->compressed)) { + sensor->csi_format = f; + sensor->internal_csi_format = f; + } + } + } + + if (!sensor->csi_format) { + dev_err(&client->dev, "no supported mbus code found\n"); + return -EINVAL; + } + + smiapp_update_mbus_formats(sensor); + + return 0; +} + +static void smiapp_update_blanking(struct smiapp_sensor *sensor) +{ + struct v4l2_ctrl *vblank = sensor->vblank; + struct v4l2_ctrl *hblank = sensor->hblank; + + vblank->minimum = + max_t(int, + sensor->limits[SMIAPP_LIMIT_MIN_FRAME_BLANKING_LINES], + sensor->limits[SMIAPP_LIMIT_MIN_FRAME_LENGTH_LINES_BIN] - + sensor->pixel_array->crop[SMIAPP_PA_PAD_SRC].height); + vblank->maximum = + sensor->limits[SMIAPP_LIMIT_MAX_FRAME_LENGTH_LINES_BIN] - + sensor->pixel_array->crop[SMIAPP_PA_PAD_SRC].height; + + vblank->val = clamp_t(int, vblank->val, + vblank->minimum, vblank->maximum); + vblank->default_value = vblank->minimum; + vblank->val = vblank->val; + vblank->cur.val = vblank->val; + + hblank->minimum = + max_t(int, + sensor->limits[SMIAPP_LIMIT_MIN_LINE_LENGTH_PCK_BIN] - + sensor->pixel_array->crop[SMIAPP_PA_PAD_SRC].width, + sensor->limits[SMIAPP_LIMIT_MIN_LINE_BLANKING_PCK_BIN]); + hblank->maximum = + sensor->limits[SMIAPP_LIMIT_MAX_LINE_LENGTH_PCK_BIN] - + sensor->pixel_array->crop[SMIAPP_PA_PAD_SRC].width; + + hblank->val = clamp_t(int, hblank->val, + hblank->minimum, hblank->maximum); + hblank->default_value = hblank->minimum; + hblank->val = hblank->val; + hblank->cur.val = hblank->val; + + __smiapp_update_exposure_limits(sensor); +} + +static int smiapp_update_mode(struct smiapp_sensor *sensor) +{ + struct i2c_client *client = v4l2_get_subdevdata(&sensor->src->sd); + unsigned int binning_mode; + int rval; + + dev_dbg(&client->dev, "frame size: %dx%d\n", + sensor->src->crop[SMIAPP_PAD_SRC].width, + sensor->src->crop[SMIAPP_PAD_SRC].height); + dev_dbg(&client->dev, "csi format width: %d\n", + sensor->csi_format->width); + + /* Binning has to be set up here; it affects limits */ + if (sensor->binning_horizontal == 1 && + sensor->binning_vertical == 1) { + binning_mode = 0; + } else { + u8 binning_type = + (sensor->binning_horizontal << 4) + | sensor->binning_vertical; + + rval = smiapp_write( + sensor, SMIAPP_REG_U8_BINNING_TYPE, binning_type); + if (rval < 0) + return rval; + + binning_mode = 1; + } + rval = smiapp_write(sensor, SMIAPP_REG_U8_BINNING_MODE, binning_mode); + if (rval < 0) + return rval; + + /* Get updated limits due to binning */ + rval = smiapp_get_limits_binning(sensor); + if (rval < 0) + return rval; + + rval = smiapp_pll_update(sensor); + if (rval < 0) + return rval; + + /* Output from pixel array, including blanking */ + smiapp_update_blanking(sensor); + + dev_dbg(&client->dev, "vblank\t\t%d\n", sensor->vblank->val); + dev_dbg(&client->dev, "hblank\t\t%d\n", sensor->hblank->val); + + dev_dbg(&client->dev, "real timeperframe\t100/%d\n", + sensor->pll.vt_pix_clk_freq_hz / + ((sensor->pixel_array->crop[SMIAPP_PA_PAD_SRC].width + + sensor->hblank->val) * + (sensor->pixel_array->crop[SMIAPP_PA_PAD_SRC].height + + sensor->vblank->val) / 100)); + + return 0; +} + +/* + * + * SMIA++ NVM handling + * + */ +static int smiapp_read_nvm(struct smiapp_sensor *sensor, + unsigned char *nvm) +{ + u32 i, s, p, np, v; + int rval = 0, rval2; + + np = sensor->nvm_size / SMIAPP_NVM_PAGE_SIZE; + for (p = 0; p < np; p++) { + rval = smiapp_write( + sensor, + SMIAPP_REG_U8_DATA_TRANSFER_IF_1_PAGE_SELECT, p); + if (rval) + goto out; + + rval = smiapp_write(sensor, + SMIAPP_REG_U8_DATA_TRANSFER_IF_1_CTRL, + SMIAPP_DATA_TRANSFER_IF_1_CTRL_EN | + SMIAPP_DATA_TRANSFER_IF_1_CTRL_RD_EN); + if (rval) + goto out; + + for (i = 0; i < 1000; i++) { + rval = smiapp_read( + sensor, + SMIAPP_REG_U8_DATA_TRANSFER_IF_1_STATUS, &s); + + if (rval) + goto out; + + if (s & SMIAPP_DATA_TRANSFER_IF_1_STATUS_RD_READY) + break; + + if (--i == 0) { + rval = -ETIMEDOUT; + goto out; + } + + } + + for (i = 0; i < SMIAPP_NVM_PAGE_SIZE; i++) { + rval = smiapp_read( + sensor, + SMIAPP_REG_U8_DATA_TRANSFER_IF_1_DATA_0 + i, + &v); + if (rval) + goto out; + + *nvm++ = v; + } + } + +out: + rval2 = smiapp_write(sensor, SMIAPP_REG_U8_DATA_TRANSFER_IF_1_CTRL, 0); + if (rval < 0) + return rval; + else + return rval2; +} + +/* + * + * SMIA++ CCI address control + * + */ +static int smiapp_change_cci_addr(struct smiapp_sensor *sensor) +{ + struct i2c_client *client = v4l2_get_subdevdata(&sensor->src->sd); + int rval; + u32 val; + + client->addr = sensor->platform_data->i2c_addr_dfl; + + rval = smiapp_write(sensor, + SMIAPP_REG_U8_CCI_ADDRESS_CONTROL, + sensor->platform_data->i2c_addr_alt << 1); + if (rval) + return rval; + + client->addr = sensor->platform_data->i2c_addr_alt; + + /* verify addr change went ok */ + rval = smiapp_read(sensor, SMIAPP_REG_U8_CCI_ADDRESS_CONTROL, &val); + if (rval) + return rval; + + if (val != sensor->platform_data->i2c_addr_alt << 1) + return -ENODEV; + + return 0; +} + +/* + * + * SMIA++ Mode Control + * + */ +static int smiapp_setup_flash_strobe(struct smiapp_sensor *sensor) +{ + struct smiapp_flash_strobe_parms *strobe_setup; + unsigned int ext_freq = sensor->platform_data->ext_clk; + u32 tmp; + u32 strobe_adjustment; + u32 strobe_width_high_rs; + int rval; + + strobe_setup = sensor->platform_data->strobe_setup; + + /* + * How to calculate registers related to strobe length. Please + * do not change, or if you do at least know what you're + * doing. :-) + * + * Sakari Ailus <sakari.ailus@maxwell.research.nokia.com> 2010-10-25 + * + * flash_strobe_length [us] / 10^6 = (tFlash_strobe_width_ctrl + * / EXTCLK freq [Hz]) * flash_strobe_adjustment + * + * tFlash_strobe_width_ctrl E N, [1 - 0xffff] + * flash_strobe_adjustment E N, [1 - 0xff] + * + * The formula above is written as below to keep it on one + * line: + * + * l / 10^6 = w / e * a + * + * Let's mark w * a by x: + * + * x = w * a + * + * Thus, we get: + * + * x = l * e / 10^6 + * + * The strobe width must be at least as long as requested, + * thus rounding upwards is needed. + * + * x = (l * e + 10^6 - 1) / 10^6 + * ----------------------------- + * + * Maximum possible accuracy is wanted at all times. Thus keep + * a as small as possible. + * + * Calculate a, assuming maximum w, with rounding upwards: + * + * a = (x + (2^16 - 1) - 1) / (2^16 - 1) + * ------------------------------------- + * + * Thus, we also get w, with that a, with rounding upwards: + * + * w = (x + a - 1) / a + * ------------------- + * + * To get limits: + * + * x E [1, (2^16 - 1) * (2^8 - 1)] + * + * Substituting maximum x to the original formula (with rounding), + * the maximum l is thus + * + * (2^16 - 1) * (2^8 - 1) * 10^6 = l * e + 10^6 - 1 + * + * l = (10^6 * (2^16 - 1) * (2^8 - 1) - 10^6 + 1) / e + * -------------------------------------------------- + * + * flash_strobe_length must be clamped between 1 and + * (10^6 * (2^16 - 1) * (2^8 - 1) - 10^6 + 1) / EXTCLK freq. + * + * Then, + * + * flash_strobe_adjustment = ((flash_strobe_length * + * EXTCLK freq + 10^6 - 1) / 10^6 + (2^16 - 1) - 1) / (2^16 - 1) + * + * tFlash_strobe_width_ctrl = ((flash_strobe_length * + * EXTCLK freq + 10^6 - 1) / 10^6 + + * flash_strobe_adjustment - 1) / flash_strobe_adjustment + */ + tmp = div_u64(1000000ULL * ((1 << 16) - 1) * ((1 << 8) - 1) - + 1000000 + 1, ext_freq); + strobe_setup->strobe_width_high_us = + clamp_t(u32, strobe_setup->strobe_width_high_us, 1, tmp); + + tmp = div_u64(((u64)strobe_setup->strobe_width_high_us * (u64)ext_freq + + 1000000 - 1), 1000000ULL); + strobe_adjustment = (tmp + (1 << 16) - 1 - 1) / ((1 << 16) - 1); + strobe_width_high_rs = (tmp + strobe_adjustment - 1) / + strobe_adjustment; + + rval = smiapp_write(sensor, SMIAPP_REG_U8_FLASH_MODE_RS, + strobe_setup->mode); + if (rval < 0) + goto out; + + rval = smiapp_write(sensor, SMIAPP_REG_U8_FLASH_STROBE_ADJUSTMENT, + strobe_adjustment); + if (rval < 0) + goto out; + + rval = smiapp_write( + sensor, SMIAPP_REG_U16_TFLASH_STROBE_WIDTH_HIGH_RS_CTRL, + strobe_width_high_rs); + if (rval < 0) + goto out; + + rval = smiapp_write(sensor, SMIAPP_REG_U16_TFLASH_STROBE_DELAY_RS_CTRL, + strobe_setup->strobe_delay); + if (rval < 0) + goto out; + + rval = smiapp_write(sensor, SMIAPP_REG_U16_FLASH_STROBE_START_POINT, + strobe_setup->stobe_start_point); + if (rval < 0) + goto out; + + rval = smiapp_write(sensor, SMIAPP_REG_U8_FLASH_TRIGGER_RS, + strobe_setup->trigger); + +out: + sensor->platform_data->strobe_setup->trigger = 0; + + return rval; +} + +/* ----------------------------------------------------------------------------- + * Power management + */ + +static int smiapp_power_on(struct smiapp_sensor *sensor) +{ + struct i2c_client *client = v4l2_get_subdevdata(&sensor->src->sd); + unsigned int sleep; + int rval; + + rval = regulator_enable(sensor->vana); + if (rval) { + dev_err(&client->dev, "failed to enable vana regulator\n"); + return rval; + } + usleep_range(1000, 1000); + + if (sensor->platform_data->set_xclk) + rval = sensor->platform_data->set_xclk( + &sensor->src->sd, sensor->platform_data->ext_clk); + else + rval = clk_enable(sensor->ext_clk); + if (rval < 0) { + dev_dbg(&client->dev, "failed to set xclk\n"); + goto out_xclk_fail; + } + usleep_range(1000, 1000); + + if (sensor->platform_data->xshutdown != SMIAPP_NO_XSHUTDOWN) + gpio_set_value(sensor->platform_data->xshutdown, 1); + + sleep = SMIAPP_RESET_DELAY(sensor->platform_data->ext_clk); + usleep_range(sleep, sleep); + + /* + * Failures to respond to the address change command have been noticed. + * Those failures seem to be caused by the sensor requiring a longer + * boot time than advertised. An additional 10ms delay seems to work + * around the issue, but the SMIA++ I2C write retry hack makes the delay + * unnecessary. The failures need to be investigated to find a proper + * fix, and a delay will likely need to be added here if the I2C write + * retry hack is reverted before the root cause of the boot time issue + * is found. + */ + + if (sensor->platform_data->i2c_addr_alt) { + rval = smiapp_change_cci_addr(sensor); + if (rval) { + dev_err(&client->dev, "cci address change error\n"); + goto out_cci_addr_fail; + } + } + + rval = smiapp_write(sensor, SMIAPP_REG_U8_SOFTWARE_RESET, + SMIAPP_SOFTWARE_RESET); + if (rval < 0) { + dev_err(&client->dev, "software reset failed\n"); + goto out_cci_addr_fail; + } + + if (sensor->platform_data->i2c_addr_alt) { + rval = smiapp_change_cci_addr(sensor); + if (rval) { + dev_err(&client->dev, "cci address change error\n"); + goto out_cci_addr_fail; + } + } + + rval = smiapp_write(sensor, SMIAPP_REG_U16_COMPRESSION_MODE, + SMIAPP_COMPRESSION_MODE_SIMPLE_PREDICTOR); + if (rval) { + dev_err(&client->dev, "compression mode set failed\n"); + goto out_cci_addr_fail; + } + + rval = smiapp_write( + sensor, SMIAPP_REG_U16_EXTCLK_FREQUENCY_MHZ, + sensor->platform_data->ext_clk / (1000000 / (1 << 8))); + if (rval) { + dev_err(&client->dev, "extclk frequency set failed\n"); + goto out_cci_addr_fail; + } + + rval = smiapp_write(sensor, SMIAPP_REG_U8_CSI_LANE_MODE, + sensor->platform_data->lanes - 1); + if (rval) { + dev_err(&client->dev, "csi lane mode set failed\n"); + goto out_cci_addr_fail; + } + + rval = smiapp_write(sensor, SMIAPP_REG_U8_FAST_STANDBY_CTRL, + SMIAPP_FAST_STANDBY_CTRL_IMMEDIATE); + if (rval) { + dev_err(&client->dev, "fast standby set failed\n"); + goto out_cci_addr_fail; + } + + rval = smiapp_write(sensor, SMIAPP_REG_U8_CSI_SIGNALLING_MODE, + sensor->platform_data->csi_signalling_mode); + if (rval) { + dev_err(&client->dev, "csi signalling mode set failed\n"); + goto out_cci_addr_fail; + } + + /* DPHY control done by sensor based on requested link rate */ + rval = smiapp_write(sensor, SMIAPP_REG_U8_DPHY_CTRL, + SMIAPP_DPHY_CTRL_UI); + if (rval < 0) + return rval; + + rval = smiapp_call_quirk(sensor, post_poweron); + if (rval) { + dev_err(&client->dev, "post_poweron quirks failed\n"); + goto out_cci_addr_fail; + } + + /* Are we still initialising...? If yes, return here. */ + if (!sensor->pixel_array) + return 0; + + rval = v4l2_ctrl_handler_setup( + &sensor->pixel_array->ctrl_handler); + if (rval) + goto out_cci_addr_fail; + + rval = v4l2_ctrl_handler_setup(&sensor->src->ctrl_handler); + if (rval) + goto out_cci_addr_fail; + + mutex_lock(&sensor->mutex); + rval = smiapp_update_mode(sensor); + mutex_unlock(&sensor->mutex); + if (rval < 0) + goto out_cci_addr_fail; + + return 0; + +out_cci_addr_fail: + if (sensor->platform_data->xshutdown != SMIAPP_NO_XSHUTDOWN) + gpio_set_value(sensor->platform_data->xshutdown, 0); + if (sensor->platform_data->set_xclk) + sensor->platform_data->set_xclk(&sensor->src->sd, 0); + else + clk_disable(sensor->ext_clk); + +out_xclk_fail: + regulator_disable(sensor->vana); + return rval; +} + +static void smiapp_power_off(struct smiapp_sensor *sensor) +{ + /* + * Currently power/clock to lens are enable/disabled separately + * but they are essentially the same signals. So if the sensor is + * powered off while the lens is powered on the sensor does not + * really see a power off and next time the cci address change + * will fail. So do a soft reset explicitly here. + */ + if (sensor->platform_data->i2c_addr_alt) + smiapp_write(sensor, + SMIAPP_REG_U8_SOFTWARE_RESET, + SMIAPP_SOFTWARE_RESET); + + if (sensor->platform_data->xshutdown != SMIAPP_NO_XSHUTDOWN) + gpio_set_value(sensor->platform_data->xshutdown, 0); + if (sensor->platform_data->set_xclk) + sensor->platform_data->set_xclk(&sensor->src->sd, 0); + else + clk_disable(sensor->ext_clk); + usleep_range(5000, 5000); + regulator_disable(sensor->vana); + sensor->streaming = 0; +} + +static int smiapp_set_power(struct v4l2_subdev *subdev, int on) +{ + struct smiapp_sensor *sensor = to_smiapp_sensor(subdev); + int ret = 0; + + mutex_lock(&sensor->power_mutex); + + /* + * If the power count is modified from 0 to != 0 or from != 0 + * to 0, update the power state. + */ + if (!sensor->power_count == !on) + goto out; + + if (on) { + /* Power on and perform initialisation. */ + ret = smiapp_power_on(sensor); + if (ret < 0) + goto out; + } else { + smiapp_power_off(sensor); + } + + /* Update the power count. */ + sensor->power_count += on ? 1 : -1; + WARN_ON(sensor->power_count < 0); + +out: + mutex_unlock(&sensor->power_mutex); + return ret; +} + +/* ----------------------------------------------------------------------------- + * Video stream management + */ + +static int smiapp_start_streaming(struct smiapp_sensor *sensor) +{ + struct i2c_client *client = v4l2_get_subdevdata(&sensor->src->sd); + int rval; + + mutex_lock(&sensor->mutex); + + rval = smiapp_write(sensor, SMIAPP_REG_U16_CSI_DATA_FORMAT, + (sensor->csi_format->width << 8) | + sensor->csi_format->compressed); + if (rval) + goto out; + + rval = smiapp_pll_configure(sensor); + if (rval) + goto out; + + /* Analog crop start coordinates */ + rval = smiapp_write(sensor, SMIAPP_REG_U16_X_ADDR_START, + sensor->pixel_array->crop[SMIAPP_PA_PAD_SRC].left); + if (rval < 0) + goto out; + + rval = smiapp_write(sensor, SMIAPP_REG_U16_Y_ADDR_START, + sensor->pixel_array->crop[SMIAPP_PA_PAD_SRC].top); + if (rval < 0) + goto out; + + /* Analog crop end coordinates */ + rval = smiapp_write( + sensor, SMIAPP_REG_U16_X_ADDR_END, + sensor->pixel_array->crop[SMIAPP_PA_PAD_SRC].left + + sensor->pixel_array->crop[SMIAPP_PA_PAD_SRC].width - 1); + if (rval < 0) + goto out; + + rval = smiapp_write( + sensor, SMIAPP_REG_U16_Y_ADDR_END, + sensor->pixel_array->crop[SMIAPP_PA_PAD_SRC].top + + sensor->pixel_array->crop[SMIAPP_PA_PAD_SRC].height - 1); + if (rval < 0) + goto out; + + /* + * Output from pixel array, including blanking, is set using + * controls below. No need to set here. + */ + + /* Digital crop */ + if (sensor->limits[SMIAPP_LIMIT_DIGITAL_CROP_CAPABILITY] + == SMIAPP_DIGITAL_CROP_CAPABILITY_INPUT_CROP) { + rval = smiapp_write( + sensor, SMIAPP_REG_U16_DIGITAL_CROP_X_OFFSET, + sensor->scaler->crop[SMIAPP_PAD_SINK].left); + if (rval < 0) + goto out; + + rval = smiapp_write( + sensor, SMIAPP_REG_U16_DIGITAL_CROP_Y_OFFSET, + sensor->scaler->crop[SMIAPP_PAD_SINK].top); + if (rval < 0) + goto out; + + rval = smiapp_write( + sensor, SMIAPP_REG_U16_DIGITAL_CROP_IMAGE_WIDTH, + sensor->scaler->crop[SMIAPP_PAD_SINK].width); + if (rval < 0) + goto out; + + rval = smiapp_write( + sensor, SMIAPP_REG_U16_DIGITAL_CROP_IMAGE_HEIGHT, + sensor->scaler->crop[SMIAPP_PAD_SINK].height); + if (rval < 0) + goto out; + } + + /* Scaling */ + if (sensor->limits[SMIAPP_LIMIT_SCALING_CAPABILITY] + != SMIAPP_SCALING_CAPABILITY_NONE) { + rval = smiapp_write(sensor, SMIAPP_REG_U16_SCALING_MODE, + sensor->scaling_mode); + if (rval < 0) + goto out; + + rval = smiapp_write(sensor, SMIAPP_REG_U16_SCALE_M, + sensor->scale_m); + if (rval < 0) + goto out; + } + + /* Output size from sensor */ + rval = smiapp_write(sensor, SMIAPP_REG_U16_X_OUTPUT_SIZE, + sensor->src->crop[SMIAPP_PAD_SRC].width); + if (rval < 0) + goto out; + rval = smiapp_write(sensor, SMIAPP_REG_U16_Y_OUTPUT_SIZE, + sensor->src->crop[SMIAPP_PAD_SRC].height); + if (rval < 0) + goto out; + + if ((sensor->flash_capability & + (SMIAPP_FLASH_MODE_CAPABILITY_SINGLE_STROBE | + SMIAPP_FLASH_MODE_CAPABILITY_MULTIPLE_STROBE)) && + sensor->platform_data->strobe_setup != NULL && + sensor->platform_data->strobe_setup->trigger != 0) { + rval = smiapp_setup_flash_strobe(sensor); + if (rval) + goto out; + } + + rval = smiapp_call_quirk(sensor, pre_streamon); + if (rval) { + dev_err(&client->dev, "pre_streamon quirks failed\n"); + goto out; + } + + rval = smiapp_write(sensor, SMIAPP_REG_U8_MODE_SELECT, + SMIAPP_MODE_SELECT_STREAMING); + +out: + mutex_unlock(&sensor->mutex); + + return rval; +} + +static int smiapp_stop_streaming(struct smiapp_sensor *sensor) +{ + struct i2c_client *client = v4l2_get_subdevdata(&sensor->src->sd); + int rval; + + mutex_lock(&sensor->mutex); + rval = smiapp_write(sensor, SMIAPP_REG_U8_MODE_SELECT, + SMIAPP_MODE_SELECT_SOFTWARE_STANDBY); + if (rval) + goto out; + + rval = smiapp_call_quirk(sensor, post_streamoff); + if (rval) + dev_err(&client->dev, "post_streamoff quirks failed\n"); + +out: + mutex_unlock(&sensor->mutex); + return rval; +} + +/* ----------------------------------------------------------------------------- + * V4L2 subdev video operations + */ + +static int smiapp_set_stream(struct v4l2_subdev *subdev, int enable) +{ + struct smiapp_sensor *sensor = to_smiapp_sensor(subdev); + int rval; + + if (sensor->streaming == enable) + return 0; + + if (enable) { + sensor->streaming = 1; + rval = smiapp_start_streaming(sensor); + if (rval < 0) + sensor->streaming = 0; + } else { + rval = smiapp_stop_streaming(sensor); + sensor->streaming = 0; + } + + return rval; +} + +static int smiapp_enum_mbus_code(struct v4l2_subdev *subdev, + struct v4l2_subdev_fh *fh, + struct v4l2_subdev_mbus_code_enum *code) +{ + struct i2c_client *client = v4l2_get_subdevdata(subdev); + struct smiapp_sensor *sensor = to_smiapp_sensor(subdev); + unsigned int i; + int idx = -1; + int rval = -EINVAL; + + mutex_lock(&sensor->mutex); + + dev_err(&client->dev, "subdev %s, pad %d, index %d\n", + subdev->name, code->pad, code->index); + + if (subdev != &sensor->src->sd || code->pad != SMIAPP_PAD_SRC) { + if (code->index) + goto out; + + code->code = sensor->internal_csi_format->code; + rval = 0; + goto out; + } + + for (i = 0; i < ARRAY_SIZE(smiapp_csi_data_formats); i++) { + if (sensor->mbus_frame_fmts & (1 << i)) + idx++; + + if (idx == code->index) { + code->code = smiapp_csi_data_formats[i].code; + dev_err(&client->dev, "found index %d, i %d, code %x\n", + code->index, i, code->code); + rval = 0; + break; + } + } + +out: + mutex_unlock(&sensor->mutex); + + return rval; +} + +static u32 __smiapp_get_mbus_code(struct v4l2_subdev *subdev, + unsigned int pad) +{ + struct smiapp_sensor *sensor = to_smiapp_sensor(subdev); + + if (subdev == &sensor->src->sd && pad == SMIAPP_PAD_SRC) + return sensor->csi_format->code; + else + return sensor->internal_csi_format->code; +} + +static int __smiapp_get_format(struct v4l2_subdev *subdev, + struct v4l2_subdev_fh *fh, + struct v4l2_subdev_format *fmt) +{ + struct smiapp_subdev *ssd = to_smiapp_subdev(subdev); + + if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) { + fmt->format = *v4l2_subdev_get_try_format(fh, fmt->pad); + } else { + struct v4l2_rect *r; + + if (fmt->pad == ssd->source_pad) + r = &ssd->crop[ssd->source_pad]; + else + r = &ssd->sink_fmt; + + fmt->format.code = __smiapp_get_mbus_code(subdev, fmt->pad); + fmt->format.width = r->width; + fmt->format.height = r->height; + } + + return 0; +} + +static int smiapp_get_format(struct v4l2_subdev *subdev, + struct v4l2_subdev_fh *fh, + struct v4l2_subdev_format *fmt) +{ + struct smiapp_sensor *sensor = to_smiapp_sensor(subdev); + int rval; + + mutex_lock(&sensor->mutex); + rval = __smiapp_get_format(subdev, fh, fmt); + mutex_unlock(&sensor->mutex); + + return rval; +} + +static void smiapp_get_crop_compose(struct v4l2_subdev *subdev, + struct v4l2_subdev_fh *fh, + struct v4l2_rect **crops, + struct v4l2_rect **comps, int which) +{ + struct smiapp_subdev *ssd = to_smiapp_subdev(subdev); + unsigned int i; + + if (which == V4L2_SUBDEV_FORMAT_ACTIVE) { + if (crops) + for (i = 0; i < subdev->entity.num_pads; i++) + crops[i] = &ssd->crop[i]; + if (comps) + *comps = &ssd->compose; + } else { + if (crops) { + for (i = 0; i < subdev->entity.num_pads; i++) { + crops[i] = v4l2_subdev_get_try_crop(fh, i); + BUG_ON(!crops[i]); + } + } + if (comps) { + *comps = v4l2_subdev_get_try_compose(fh, + SMIAPP_PAD_SINK); + BUG_ON(!*comps); + } + } +} + +/* Changes require propagation only on sink pad. */ +static void smiapp_propagate(struct v4l2_subdev *subdev, + struct v4l2_subdev_fh *fh, int which, + int target) +{ + struct smiapp_sensor *sensor = to_smiapp_sensor(subdev); + struct smiapp_subdev *ssd = to_smiapp_subdev(subdev); + struct v4l2_rect *comp, *crops[SMIAPP_PADS]; + + smiapp_get_crop_compose(subdev, fh, crops, &comp, which); + + switch (target) { + case V4L2_SEL_TGT_CROP: + comp->width = crops[SMIAPP_PAD_SINK]->width; + comp->height = crops[SMIAPP_PAD_SINK]->height; + if (which == V4L2_SUBDEV_FORMAT_ACTIVE) { + if (ssd == sensor->scaler) { + sensor->scale_m = + sensor->limits[ + SMIAPP_LIMIT_SCALER_N_MIN]; + sensor->scaling_mode = + SMIAPP_SCALING_MODE_NONE; + } else if (ssd == sensor->binner) { + sensor->binning_horizontal = 1; + sensor->binning_vertical = 1; + } + } + /* Fall through */ + case V4L2_SEL_TGT_COMPOSE: + *crops[SMIAPP_PAD_SRC] = *comp; + break; + default: + BUG(); + } +} + +static const struct smiapp_csi_data_format +*smiapp_validate_csi_data_format(struct smiapp_sensor *sensor, u32 code) +{ + const struct smiapp_csi_data_format *csi_format = sensor->csi_format; + unsigned int i; + + for (i = 0; i < ARRAY_SIZE(smiapp_csi_data_formats); i++) { + if (sensor->mbus_frame_fmts & (1 << i) + && smiapp_csi_data_formats[i].code == code) + return &smiapp_csi_data_formats[i]; + } + + return csi_format; +} + +static int smiapp_set_format(struct v4l2_subdev *subdev, + struct v4l2_subdev_fh *fh, + struct v4l2_subdev_format *fmt) +{ + struct smiapp_sensor *sensor = to_smiapp_sensor(subdev); + struct smiapp_subdev *ssd = to_smiapp_subdev(subdev); + struct v4l2_rect *crops[SMIAPP_PADS]; + + mutex_lock(&sensor->mutex); + + /* + * Media bus code is changeable on src subdev's source pad. On + * other source pads we just get format here. + */ + if (fmt->pad == ssd->source_pad) { + u32 code = fmt->format.code; + int rval = __smiapp_get_format(subdev, fh, fmt); + + if (!rval && subdev == &sensor->src->sd) { + const struct smiapp_csi_data_format *csi_format = + smiapp_validate_csi_data_format(sensor, code); + if (fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE) + sensor->csi_format = csi_format; + fmt->format.code = csi_format->code; + } + + mutex_unlock(&sensor->mutex); + return rval; + } + + /* Sink pad. Width and height are changeable here. */ + fmt->format.code = __smiapp_get_mbus_code(subdev, fmt->pad); + fmt->format.width &= ~1; + fmt->format.height &= ~1; + + fmt->format.width = + clamp(fmt->format.width, + sensor->limits[SMIAPP_LIMIT_MIN_X_OUTPUT_SIZE], + sensor->limits[SMIAPP_LIMIT_MAX_X_OUTPUT_SIZE]); + fmt->format.height = + clamp(fmt->format.height, + sensor->limits[SMIAPP_LIMIT_MIN_Y_OUTPUT_SIZE], + sensor->limits[SMIAPP_LIMIT_MAX_Y_OUTPUT_SIZE]); + + smiapp_get_crop_compose(subdev, fh, crops, NULL, fmt->which); + + crops[ssd->sink_pad]->left = 0; + crops[ssd->sink_pad]->top = 0; + crops[ssd->sink_pad]->width = fmt->format.width; + crops[ssd->sink_pad]->height = fmt->format.height; + if (fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE) + ssd->sink_fmt = *crops[ssd->sink_pad]; + smiapp_propagate(subdev, fh, fmt->which, + V4L2_SEL_TGT_CROP); + + mutex_unlock(&sensor->mutex); + + return 0; +} + +/* + * Calculate goodness of scaled image size compared to expected image + * size and flags provided. + */ +#define SCALING_GOODNESS 100000 +#define SCALING_GOODNESS_EXTREME 100000000 +static int scaling_goodness(struct v4l2_subdev *subdev, int w, int ask_w, + int h, int ask_h, u32 flags) +{ + struct smiapp_sensor *sensor = to_smiapp_sensor(subdev); + struct i2c_client *client = v4l2_get_subdevdata(subdev); + int val = 0; + + w &= ~1; + ask_w &= ~1; + h &= ~1; + ask_h &= ~1; + + if (flags & V4L2_SEL_FLAG_GE) { + if (w < ask_w) + val -= SCALING_GOODNESS; + if (h < ask_h) + val -= SCALING_GOODNESS; + } + + if (flags & V4L2_SEL_FLAG_LE) { + if (w > ask_w) + val -= SCALING_GOODNESS; + if (h > ask_h) + val -= SCALING_GOODNESS; + } + + val -= abs(w - ask_w); + val -= abs(h - ask_h); + + if (w < sensor->limits[SMIAPP_LIMIT_MIN_X_OUTPUT_SIZE]) + val -= SCALING_GOODNESS_EXTREME; + + dev_dbg(&client->dev, "w %d ask_w %d h %d ask_h %d goodness %d\n", + w, ask_h, h, ask_h, val); + + return val; +} + +static void smiapp_set_compose_binner(struct v4l2_subdev *subdev, + struct v4l2_subdev_fh *fh, + struct v4l2_subdev_selection *sel, + struct v4l2_rect **crops, + struct v4l2_rect *comp) +{ + struct smiapp_sensor *sensor = to_smiapp_sensor(subdev); + unsigned int i; + unsigned int binh = 1, binv = 1; + unsigned int best = scaling_goodness( + subdev, + crops[SMIAPP_PAD_SINK]->width, sel->r.width, + crops[SMIAPP_PAD_SINK]->height, sel->r.height, sel->flags); + + for (i = 0; i < sensor->nbinning_subtypes; i++) { + int this = scaling_goodness( + subdev, + crops[SMIAPP_PAD_SINK]->width + / sensor->binning_subtypes[i].horizontal, + sel->r.width, + crops[SMIAPP_PAD_SINK]->height + / sensor->binning_subtypes[i].vertical, + sel->r.height, sel->flags); + + if (this > best) { + binh = sensor->binning_subtypes[i].horizontal; + binv = sensor->binning_subtypes[i].vertical; + best = this; + } + } + if (sel->which == V4L2_SUBDEV_FORMAT_ACTIVE) { + sensor->binning_vertical = binv; + sensor->binning_horizontal = binh; + } + + sel->r.width = (crops[SMIAPP_PAD_SINK]->width / binh) & ~1; + sel->r.height = (crops[SMIAPP_PAD_SINK]->height / binv) & ~1; +} + +/* + * Calculate best scaling ratio and mode for given output resolution. + * + * Try all of these: horizontal ratio, vertical ratio and smallest + * size possible (horizontally). + * + * Also try whether horizontal scaler or full scaler gives a better + * result. + */ +static void smiapp_set_compose_scaler(struct v4l2_subdev *subdev, + struct v4l2_subdev_fh *fh, + struct v4l2_subdev_selection *sel, + struct v4l2_rect **crops, + struct v4l2_rect *comp) +{ + struct i2c_client *client = v4l2_get_subdevdata(subdev); + struct smiapp_sensor *sensor = to_smiapp_sensor(subdev); + u32 min, max, a, b, max_m; + u32 scale_m = sensor->limits[SMIAPP_LIMIT_SCALER_N_MIN]; + int mode = SMIAPP_SCALING_MODE_HORIZONTAL; + u32 try[4]; + u32 ntry = 0; + unsigned int i; + int best = INT_MIN; + + sel->r.width = min_t(unsigned int, sel->r.width, + crops[SMIAPP_PAD_SINK]->width); + sel->r.height = min_t(unsigned int, sel->r.height, + crops[SMIAPP_PAD_SINK]->height); + + a = crops[SMIAPP_PAD_SINK]->width + * sensor->limits[SMIAPP_LIMIT_SCALER_N_MIN] / sel->r.width; + b = crops[SMIAPP_PAD_SINK]->height + * sensor->limits[SMIAPP_LIMIT_SCALER_N_MIN] / sel->r.height; + max_m = crops[SMIAPP_PAD_SINK]->width + * sensor->limits[SMIAPP_LIMIT_SCALER_N_MIN] + / sensor->limits[SMIAPP_LIMIT_MIN_X_OUTPUT_SIZE]; + + a = min(sensor->limits[SMIAPP_LIMIT_SCALER_M_MAX], + max(a, sensor->limits[SMIAPP_LIMIT_SCALER_M_MIN])); + b = min(sensor->limits[SMIAPP_LIMIT_SCALER_M_MAX], + max(b, sensor->limits[SMIAPP_LIMIT_SCALER_M_MIN])); + max_m = min(sensor->limits[SMIAPP_LIMIT_SCALER_M_MAX], + max(max_m, sensor->limits[SMIAPP_LIMIT_SCALER_M_MIN])); + + dev_dbg(&client->dev, "scaling: a %d b %d max_m %d\n", a, b, max_m); + + min = min(max_m, min(a, b)); + max = min(max_m, max(a, b)); + + try[ntry] = min; + ntry++; + if (min != max) { + try[ntry] = max; + ntry++; + } + if (max != max_m) { + try[ntry] = min + 1; + ntry++; + if (min != max) { + try[ntry] = max + 1; + ntry++; + } + } + + for (i = 0; i < ntry; i++) { + int this = scaling_goodness( + subdev, + crops[SMIAPP_PAD_SINK]->width + / try[i] + * sensor->limits[SMIAPP_LIMIT_SCALER_N_MIN], + sel->r.width, + crops[SMIAPP_PAD_SINK]->height, + sel->r.height, + sel->flags); + + dev_dbg(&client->dev, "trying factor %d (%d)\n", try[i], i); + + if (this > best) { + scale_m = try[i]; + mode = SMIAPP_SCALING_MODE_HORIZONTAL; + best = this; + } + + if (sensor->limits[SMIAPP_LIMIT_SCALING_CAPABILITY] + == SMIAPP_SCALING_CAPABILITY_HORIZONTAL) + continue; + + this = scaling_goodness( + subdev, crops[SMIAPP_PAD_SINK]->width + / try[i] + * sensor->limits[SMIAPP_LIMIT_SCALER_N_MIN], + sel->r.width, + crops[SMIAPP_PAD_SINK]->height + / try[i] + * sensor->limits[SMIAPP_LIMIT_SCALER_N_MIN], + sel->r.height, + sel->flags); + + if (this > best) { + scale_m = try[i]; + mode = SMIAPP_SCALING_MODE_BOTH; + best = this; + } + } + + sel->r.width = + (crops[SMIAPP_PAD_SINK]->width + / scale_m + * sensor->limits[SMIAPP_LIMIT_SCALER_N_MIN]) & ~1; + if (mode == SMIAPP_SCALING_MODE_BOTH) + sel->r.height = + (crops[SMIAPP_PAD_SINK]->height + / scale_m + * sensor->limits[SMIAPP_LIMIT_SCALER_N_MIN]) + & ~1; + else + sel->r.height = crops[SMIAPP_PAD_SINK]->height; + + if (sel->which == V4L2_SUBDEV_FORMAT_ACTIVE) { + sensor->scale_m = scale_m; + sensor->scaling_mode = mode; + } +} +/* We're only called on source pads. This function sets scaling. */ +static int smiapp_set_compose(struct v4l2_subdev *subdev, + struct v4l2_subdev_fh *fh, + struct v4l2_subdev_selection *sel) +{ + struct smiapp_sensor *sensor = to_smiapp_sensor(subdev); + struct smiapp_subdev *ssd = to_smiapp_subdev(subdev); + struct v4l2_rect *comp, *crops[SMIAPP_PADS]; + + smiapp_get_crop_compose(subdev, fh, crops, &comp, sel->which); + + sel->r.top = 0; + sel->r.left = 0; + + if (ssd == sensor->binner) + smiapp_set_compose_binner(subdev, fh, sel, crops, comp); + else + smiapp_set_compose_scaler(subdev, fh, sel, crops, comp); + + *comp = sel->r; + smiapp_propagate(subdev, fh, sel->which, + V4L2_SEL_TGT_COMPOSE); + + if (sel->which == V4L2_SUBDEV_FORMAT_ACTIVE) + return smiapp_update_mode(sensor); + + return 0; +} + +static int __smiapp_sel_supported(struct v4l2_subdev *subdev, + struct v4l2_subdev_selection *sel) +{ + struct smiapp_sensor *sensor = to_smiapp_sensor(subdev); + struct smiapp_subdev *ssd = to_smiapp_subdev(subdev); + + /* We only implement crop in three places. */ + switch (sel->target) { + case V4L2_SEL_TGT_CROP: + case V4L2_SEL_TGT_CROP_BOUNDS: + if (ssd == sensor->pixel_array + && sel->pad == SMIAPP_PA_PAD_SRC) + return 0; + if (ssd == sensor->src + && sel->pad == SMIAPP_PAD_SRC) + return 0; + if (ssd == sensor->scaler + && sel->pad == SMIAPP_PAD_SINK + && sensor->limits[SMIAPP_LIMIT_DIGITAL_CROP_CAPABILITY] + == SMIAPP_DIGITAL_CROP_CAPABILITY_INPUT_CROP) + return 0; + return -EINVAL; + case V4L2_SEL_TGT_COMPOSE: + case V4L2_SEL_TGT_COMPOSE_BOUNDS: + if (sel->pad == ssd->source_pad) + return -EINVAL; + if (ssd == sensor->binner) + return 0; + if (ssd == sensor->scaler + && sensor->limits[SMIAPP_LIMIT_SCALING_CAPABILITY] + != SMIAPP_SCALING_CAPABILITY_NONE) + return 0; + /* Fall through */ + default: + return -EINVAL; + } +} + +static int smiapp_set_crop(struct v4l2_subdev *subdev, + struct v4l2_subdev_fh *fh, + struct v4l2_subdev_selection *sel) +{ + struct smiapp_sensor *sensor = to_smiapp_sensor(subdev); + struct smiapp_subdev *ssd = to_smiapp_subdev(subdev); + struct v4l2_rect *src_size, *crops[SMIAPP_PADS]; + struct v4l2_rect _r; + + smiapp_get_crop_compose(subdev, fh, crops, NULL, sel->which); + + if (sel->which == V4L2_SUBDEV_FORMAT_ACTIVE) { + if (sel->pad == ssd->sink_pad) + src_size = &ssd->sink_fmt; + else + src_size = &ssd->compose; + } else { + if (sel->pad == ssd->sink_pad) { + _r.left = 0; + _r.top = 0; + _r.width = v4l2_subdev_get_try_format(fh, sel->pad) + ->width; + _r.height = v4l2_subdev_get_try_format(fh, sel->pad) + ->height; + src_size = &_r; + } else { + src_size = + v4l2_subdev_get_try_compose( + fh, ssd->sink_pad); + } + } + + if (ssd == sensor->src && sel->pad == SMIAPP_PAD_SRC) { + sel->r.left = 0; + sel->r.top = 0; + } + + sel->r.width = min(sel->r.width, src_size->width); + sel->r.height = min(sel->r.height, src_size->height); + + sel->r.left = min(sel->r.left, src_size->width - sel->r.width); + sel->r.top = min(sel->r.top, src_size->height - sel->r.height); + + *crops[sel->pad] = sel->r; + + if (ssd != sensor->pixel_array && sel->pad == SMIAPP_PAD_SINK) + smiapp_propagate(subdev, fh, sel->which, + V4L2_SEL_TGT_CROP); + + return 0; +} + +static int __smiapp_get_selection(struct v4l2_subdev *subdev, + struct v4l2_subdev_fh *fh, + struct v4l2_subdev_selection *sel) +{ + struct smiapp_sensor *sensor = to_smiapp_sensor(subdev); + struct smiapp_subdev *ssd = to_smiapp_subdev(subdev); + struct v4l2_rect *comp, *crops[SMIAPP_PADS]; + struct v4l2_rect sink_fmt; + int ret; + + ret = __smiapp_sel_supported(subdev, sel); + if (ret) + return ret; + + smiapp_get_crop_compose(subdev, fh, crops, &comp, sel->which); + + if (sel->which == V4L2_SUBDEV_FORMAT_ACTIVE) { + sink_fmt = ssd->sink_fmt; + } else { + struct v4l2_mbus_framefmt *fmt = + v4l2_subdev_get_try_format(fh, ssd->sink_pad); + + sink_fmt.left = 0; + sink_fmt.top = 0; + sink_fmt.width = fmt->width; + sink_fmt.height = fmt->height; + } + + switch (sel->target) { + case V4L2_SEL_TGT_CROP_BOUNDS: + if (ssd == sensor->pixel_array) { + sel->r.width = + sensor->limits[SMIAPP_LIMIT_X_ADDR_MAX] + 1; + sel->r.height = + sensor->limits[SMIAPP_LIMIT_Y_ADDR_MAX] + 1; + } else if (sel->pad == ssd->sink_pad) { + sel->r = sink_fmt; + } else { + sel->r = *comp; + } + break; + case V4L2_SEL_TGT_CROP: + case V4L2_SEL_TGT_COMPOSE_BOUNDS: + sel->r = *crops[sel->pad]; + break; + case V4L2_SEL_TGT_COMPOSE: + sel->r = *comp; + break; + } + + return 0; +} + +static int smiapp_get_selection(struct v4l2_subdev *subdev, + struct v4l2_subdev_fh *fh, + struct v4l2_subdev_selection *sel) +{ + struct smiapp_sensor *sensor = to_smiapp_sensor(subdev); + int rval; + + mutex_lock(&sensor->mutex); + rval = __smiapp_get_selection(subdev, fh, sel); + mutex_unlock(&sensor->mutex); + + return rval; +} +static int smiapp_set_selection(struct v4l2_subdev *subdev, + struct v4l2_subdev_fh *fh, + struct v4l2_subdev_selection *sel) +{ + struct smiapp_sensor *sensor = to_smiapp_sensor(subdev); + int ret; + + ret = __smiapp_sel_supported(subdev, sel); + if (ret) + return ret; + + mutex_lock(&sensor->mutex); + + sel->r.left = max(0, sel->r.left & ~1); + sel->r.top = max(0, sel->r.top & ~1); + sel->r.width = max(0, SMIAPP_ALIGN_DIM(sel->r.width, sel->flags)); + sel->r.height = max(0, SMIAPP_ALIGN_DIM(sel->r.height, sel->flags)); + + sel->r.width = max_t(unsigned int, + sensor->limits[SMIAPP_LIMIT_MIN_X_OUTPUT_SIZE], + sel->r.width); + sel->r.height = max_t(unsigned int, + sensor->limits[SMIAPP_LIMIT_MIN_Y_OUTPUT_SIZE], + sel->r.height); + + switch (sel->target) { + case V4L2_SEL_TGT_CROP: + ret = smiapp_set_crop(subdev, fh, sel); + break; + case V4L2_SEL_TGT_COMPOSE: + ret = smiapp_set_compose(subdev, fh, sel); + break; + default: + BUG(); + } + + mutex_unlock(&sensor->mutex); + return ret; +} + +static int smiapp_get_skip_frames(struct v4l2_subdev *subdev, u32 *frames) +{ + struct smiapp_sensor *sensor = to_smiapp_sensor(subdev); + + *frames = sensor->frame_skip; + return 0; +} + +/* ----------------------------------------------------------------------------- + * sysfs attributes + */ + +static ssize_t +smiapp_sysfs_nvm_read(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct v4l2_subdev *subdev = i2c_get_clientdata(to_i2c_client(dev)); + struct i2c_client *client = v4l2_get_subdevdata(subdev); + struct smiapp_sensor *sensor = to_smiapp_sensor(subdev); + unsigned int nbytes; + + if (!sensor->dev_init_done) + return -EBUSY; + + if (!sensor->nvm_size) { + /* NVM not read yet - read it now */ + sensor->nvm_size = sensor->platform_data->nvm_size; + if (smiapp_set_power(subdev, 1) < 0) + return -ENODEV; + if (smiapp_read_nvm(sensor, sensor->nvm)) { + dev_err(&client->dev, "nvm read failed\n"); + return -ENODEV; + } + smiapp_set_power(subdev, 0); + } + /* + * NVM is still way below a PAGE_SIZE, so we can safely + * assume this for now. + */ + nbytes = min_t(unsigned int, sensor->nvm_size, PAGE_SIZE); + memcpy(buf, sensor->nvm, nbytes); + + return nbytes; +} +static DEVICE_ATTR(nvm, S_IRUGO, smiapp_sysfs_nvm_read, NULL); + +static ssize_t +smiapp_sysfs_ident_read(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct v4l2_subdev *subdev = i2c_get_clientdata(to_i2c_client(dev)); + struct smiapp_sensor *sensor = to_smiapp_sensor(subdev); + struct smiapp_module_info *minfo = &sensor->minfo; + + return snprintf(buf, PAGE_SIZE, "%2.2x%4.4x%2.2x\n", + minfo->manufacturer_id, minfo->model_id, + minfo->revision_number_major) + 1; +} + +static DEVICE_ATTR(ident, S_IRUGO, smiapp_sysfs_ident_read, NULL); + +/* ----------------------------------------------------------------------------- + * V4L2 subdev core operations + */ + +static int smiapp_identify_module(struct v4l2_subdev *subdev) +{ + struct smiapp_sensor *sensor = to_smiapp_sensor(subdev); + struct i2c_client *client = v4l2_get_subdevdata(subdev); + struct smiapp_module_info *minfo = &sensor->minfo; + unsigned int i; + int rval = 0; + + minfo->name = SMIAPP_NAME; + + /* Module info */ + rval = smiapp_read_8only(sensor, SMIAPP_REG_U8_MANUFACTURER_ID, + &minfo->manufacturer_id); + if (!rval) + rval = smiapp_read_8only(sensor, SMIAPP_REG_U16_MODEL_ID, + &minfo->model_id); + if (!rval) + rval = smiapp_read_8only(sensor, + SMIAPP_REG_U8_REVISION_NUMBER_MAJOR, + &minfo->revision_number_major); + if (!rval) + rval = smiapp_read_8only(sensor, + SMIAPP_REG_U8_REVISION_NUMBER_MINOR, + &minfo->revision_number_minor); + if (!rval) + rval = smiapp_read_8only(sensor, + SMIAPP_REG_U8_MODULE_DATE_YEAR, + &minfo->module_year); + if (!rval) + rval = smiapp_read_8only(sensor, + SMIAPP_REG_U8_MODULE_DATE_MONTH, + &minfo->module_month); + if (!rval) + rval = smiapp_read_8only(sensor, SMIAPP_REG_U8_MODULE_DATE_DAY, + &minfo->module_day); + + /* Sensor info */ + if (!rval) + rval = smiapp_read_8only(sensor, + SMIAPP_REG_U8_SENSOR_MANUFACTURER_ID, + &minfo->sensor_manufacturer_id); + if (!rval) + rval = smiapp_read_8only(sensor, + SMIAPP_REG_U16_SENSOR_MODEL_ID, + &minfo->sensor_model_id); + if (!rval) + rval = smiapp_read_8only(sensor, + SMIAPP_REG_U8_SENSOR_REVISION_NUMBER, + &minfo->sensor_revision_number); + if (!rval) + rval = smiapp_read_8only(sensor, + SMIAPP_REG_U8_SENSOR_FIRMWARE_VERSION, + &minfo->sensor_firmware_version); + + /* SMIA */ + if (!rval) + rval = smiapp_read_8only(sensor, SMIAPP_REG_U8_SMIA_VERSION, + &minfo->smia_version); + if (!rval) + rval = smiapp_read_8only(sensor, SMIAPP_REG_U8_SMIAPP_VERSION, + &minfo->smiapp_version); + + if (rval) { + dev_err(&client->dev, "sensor detection failed\n"); + return -ENODEV; + } + + dev_dbg(&client->dev, "module 0x%2.2x-0x%4.4x\n", + minfo->manufacturer_id, minfo->model_id); + + dev_dbg(&client->dev, + "module revision 0x%2.2x-0x%2.2x date %2.2d-%2.2d-%2.2d\n", + minfo->revision_number_major, minfo->revision_number_minor, + minfo->module_year, minfo->module_month, minfo->module_day); + + dev_dbg(&client->dev, "sensor 0x%2.2x-0x%4.4x\n", + minfo->sensor_manufacturer_id, minfo->sensor_model_id); + + dev_dbg(&client->dev, + "sensor revision 0x%2.2x firmware version 0x%2.2x\n", + minfo->sensor_revision_number, minfo->sensor_firmware_version); + + dev_dbg(&client->dev, "smia version %2.2d smiapp version %2.2d\n", + minfo->smia_version, minfo->smiapp_version); + + /* + * Some modules have bad data in the lvalues below. Hope the + * rvalues have better stuff. The lvalues are module + * parameters whereas the rvalues are sensor parameters. + */ + if (!minfo->manufacturer_id && !minfo->model_id) { + minfo->manufacturer_id = minfo->sensor_manufacturer_id; + minfo->model_id = minfo->sensor_model_id; + minfo->revision_number_major = minfo->sensor_revision_number; + } + + for (i = 0; i < ARRAY_SIZE(smiapp_module_idents); i++) { + if (smiapp_module_idents[i].manufacturer_id + != minfo->manufacturer_id) + continue; + if (smiapp_module_idents[i].model_id != minfo->model_id) + continue; + if (smiapp_module_idents[i].flags + & SMIAPP_MODULE_IDENT_FLAG_REV_LE) { + if (smiapp_module_idents[i].revision_number_major + < minfo->revision_number_major) + continue; + } else { + if (smiapp_module_idents[i].revision_number_major + != minfo->revision_number_major) + continue; + } + + minfo->name = smiapp_module_idents[i].name; + minfo->quirk = smiapp_module_idents[i].quirk; + break; + } + + if (i >= ARRAY_SIZE(smiapp_module_idents)) + dev_warn(&client->dev, + "no quirks for this module; let's hope it's fully compliant\n"); + + dev_dbg(&client->dev, "the sensor is called %s, ident %2.2x%4.4x%2.2x\n", + minfo->name, minfo->manufacturer_id, minfo->model_id, + minfo->revision_number_major); + + strlcpy(subdev->name, sensor->minfo.name, sizeof(subdev->name)); + + return 0; +} + +static const struct v4l2_subdev_ops smiapp_ops; +static const struct v4l2_subdev_internal_ops smiapp_internal_ops; +static const struct media_entity_operations smiapp_entity_ops; + +static int smiapp_registered(struct v4l2_subdev *subdev) +{ + struct smiapp_sensor *sensor = to_smiapp_sensor(subdev); + struct i2c_client *client = v4l2_get_subdevdata(subdev); + struct smiapp_subdev *last = NULL; + u32 tmp; + unsigned int i; + int rval; + + sensor->vana = devm_regulator_get(&client->dev, "VANA"); + if (IS_ERR(sensor->vana)) { + dev_err(&client->dev, "could not get regulator for vana\n"); + return -ENODEV; + } + + if (!sensor->platform_data->set_xclk) { + sensor->ext_clk = devm_clk_get(&client->dev, + sensor->platform_data->ext_clk_name); + if (IS_ERR(sensor->ext_clk)) { + dev_err(&client->dev, "could not get clock %s\n", + sensor->platform_data->ext_clk_name); + return -ENODEV; + } + + rval = clk_set_rate(sensor->ext_clk, + sensor->platform_data->ext_clk); + if (rval < 0) { + dev_err(&client->dev, + "unable to set clock %s freq to %u\n", + sensor->platform_data->ext_clk_name, + sensor->platform_data->ext_clk); + return -ENODEV; + } + } + + if (sensor->platform_data->xshutdown != SMIAPP_NO_XSHUTDOWN) { + if (gpio_request_one(sensor->platform_data->xshutdown, 0, + "SMIA++ xshutdown") != 0) { + dev_err(&client->dev, + "unable to acquire reset gpio %d\n", + sensor->platform_data->xshutdown); + return -ENODEV; + } + } + + rval = smiapp_power_on(sensor); + if (rval) { + rval = -ENODEV; + goto out_smiapp_power_on; + } + + rval = smiapp_identify_module(subdev); + if (rval) { + rval = -ENODEV; + goto out_power_off; + } + + rval = smiapp_get_all_limits(sensor); + if (rval) { + rval = -ENODEV; + goto out_power_off; + } + + /* + * Handle Sensor Module orientation on the board. + * + * The application of H-FLIP and V-FLIP on the sensor is modified by + * the sensor orientation on the board. + * + * For SMIAPP_BOARD_SENSOR_ORIENT_180 the default behaviour is to set + * both H-FLIP and V-FLIP for normal operation which also implies + * that a set/unset operation for user space HFLIP and VFLIP v4l2 + * controls will need to be internally inverted. + * + * Rotation also changes the bayer pattern. + */ + if (sensor->platform_data->module_board_orient == + SMIAPP_MODULE_BOARD_ORIENT_180) + sensor->hvflip_inv_mask = SMIAPP_IMAGE_ORIENTATION_HFLIP | + SMIAPP_IMAGE_ORIENTATION_VFLIP; + + rval = smiapp_get_mbus_formats(sensor); + if (rval) { + rval = -ENODEV; + goto out_power_off; + } + + if (sensor->limits[SMIAPP_LIMIT_BINNING_CAPABILITY]) { + u32 val; + + rval = smiapp_read(sensor, + SMIAPP_REG_U8_BINNING_SUBTYPES, &val); + if (rval < 0) { + rval = -ENODEV; + goto out_power_off; + } + sensor->nbinning_subtypes = min_t(u8, val, + SMIAPP_BINNING_SUBTYPES); + + for (i = 0; i < sensor->nbinning_subtypes; i++) { + rval = smiapp_read( + sensor, SMIAPP_REG_U8_BINNING_TYPE_n(i), &val); + if (rval < 0) { + rval = -ENODEV; + goto out_power_off; + } + sensor->binning_subtypes[i] = + *(struct smiapp_binning_subtype *)&val; + + dev_dbg(&client->dev, "binning %xx%x\n", + sensor->binning_subtypes[i].horizontal, + sensor->binning_subtypes[i].vertical); + } + } + sensor->binning_horizontal = 1; + sensor->binning_vertical = 1; + + if (device_create_file(&client->dev, &dev_attr_ident) != 0) { + dev_err(&client->dev, "sysfs ident entry creation failed\n"); + rval = -ENOENT; + goto out_power_off; + } + /* SMIA++ NVM initialization - it will be read from the sensor + * when it is first requested by userspace. + */ + if (sensor->minfo.smiapp_version && sensor->platform_data->nvm_size) { + sensor->nvm = devm_kzalloc(&client->dev, + sensor->platform_data->nvm_size, GFP_KERNEL); + if (sensor->nvm == NULL) { + dev_err(&client->dev, "nvm buf allocation failed\n"); + rval = -ENOMEM; + goto out_ident_release; + } + + if (device_create_file(&client->dev, &dev_attr_nvm) != 0) { + dev_err(&client->dev, "sysfs nvm entry failed\n"); + rval = -EBUSY; + goto out_ident_release; + } + } + + rval = smiapp_call_quirk(sensor, limits); + if (rval) { + dev_err(&client->dev, "limits quirks failed\n"); + goto out_nvm_release; + } + + /* We consider this as profile 0 sensor if any of these are zero. */ + if (!sensor->limits[SMIAPP_LIMIT_MIN_OP_SYS_CLK_DIV] || + !sensor->limits[SMIAPP_LIMIT_MAX_OP_SYS_CLK_DIV] || + !sensor->limits[SMIAPP_LIMIT_MIN_OP_PIX_CLK_DIV] || + !sensor->limits[SMIAPP_LIMIT_MAX_OP_PIX_CLK_DIV]) { + sensor->minfo.smiapp_profile = SMIAPP_PROFILE_0; + } else if (sensor->limits[SMIAPP_LIMIT_SCALING_CAPABILITY] + != SMIAPP_SCALING_CAPABILITY_NONE) { + if (sensor->limits[SMIAPP_LIMIT_SCALING_CAPABILITY] + == SMIAPP_SCALING_CAPABILITY_HORIZONTAL) + sensor->minfo.smiapp_profile = SMIAPP_PROFILE_1; + else + sensor->minfo.smiapp_profile = SMIAPP_PROFILE_2; + sensor->scaler = &sensor->ssds[sensor->ssds_used]; + sensor->ssds_used++; + } else if (sensor->limits[SMIAPP_LIMIT_DIGITAL_CROP_CAPABILITY] + == SMIAPP_DIGITAL_CROP_CAPABILITY_INPUT_CROP) { + sensor->scaler = &sensor->ssds[sensor->ssds_used]; + sensor->ssds_used++; + } + sensor->binner = &sensor->ssds[sensor->ssds_used]; + sensor->ssds_used++; + sensor->pixel_array = &sensor->ssds[sensor->ssds_used]; + sensor->ssds_used++; + + sensor->scale_m = sensor->limits[SMIAPP_LIMIT_SCALER_N_MIN]; + + for (i = 0; i < SMIAPP_SUBDEVS; i++) { + struct { + struct smiapp_subdev *ssd; + char *name; + } const __this[] = { + { sensor->scaler, "scaler", }, + { sensor->binner, "binner", }, + { sensor->pixel_array, "pixel array", }, + }, *_this = &__this[i]; + struct smiapp_subdev *this = _this->ssd; + + if (!this) + continue; + + if (this != sensor->src) + v4l2_subdev_init(&this->sd, &smiapp_ops); + + this->sensor = sensor; + + if (this == sensor->pixel_array) { + this->npads = 1; + } else { + this->npads = 2; + this->source_pad = 1; + } + + snprintf(this->sd.name, + sizeof(this->sd.name), "%s %s", + sensor->minfo.name, _this->name); + + this->sink_fmt.width = + sensor->limits[SMIAPP_LIMIT_X_ADDR_MAX] + 1; + this->sink_fmt.height = + sensor->limits[SMIAPP_LIMIT_Y_ADDR_MAX] + 1; + this->compose.width = this->sink_fmt.width; + this->compose.height = this->sink_fmt.height; + this->crop[this->source_pad] = this->compose; + this->pads[this->source_pad].flags = MEDIA_PAD_FL_SOURCE; + if (this != sensor->pixel_array) { + this->crop[this->sink_pad] = this->compose; + this->pads[this->sink_pad].flags = MEDIA_PAD_FL_SINK; + } + + this->sd.entity.ops = &smiapp_entity_ops; + + if (last == NULL) { + last = this; + continue; + } + + this->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; + this->sd.internal_ops = &smiapp_internal_ops; + this->sd.owner = NULL; + v4l2_set_subdevdata(&this->sd, client); + + rval = media_entity_init(&this->sd.entity, + this->npads, this->pads, 0); + if (rval) { + dev_err(&client->dev, + "media_entity_init failed\n"); + goto out_nvm_release; + } + + rval = media_entity_create_link(&this->sd.entity, + this->source_pad, + &last->sd.entity, + last->sink_pad, + MEDIA_LNK_FL_ENABLED | + MEDIA_LNK_FL_IMMUTABLE); + if (rval) { + dev_err(&client->dev, + "media_entity_create_link failed\n"); + goto out_nvm_release; + } + + rval = v4l2_device_register_subdev(sensor->src->sd.v4l2_dev, + &this->sd); + if (rval) { + dev_err(&client->dev, + "v4l2_device_register_subdev failed\n"); + goto out_nvm_release; + } + + last = this; + } + + dev_dbg(&client->dev, "profile %d\n", sensor->minfo.smiapp_profile); + + sensor->pixel_array->sd.entity.type = MEDIA_ENT_T_V4L2_SUBDEV_SENSOR; + + /* final steps */ + smiapp_read_frame_fmt(sensor); + rval = smiapp_init_controls(sensor); + if (rval < 0) + goto out_nvm_release; + + rval = smiapp_update_mode(sensor); + if (rval) { + dev_err(&client->dev, "update mode failed\n"); + goto out_nvm_release; + } + + sensor->streaming = false; + sensor->dev_init_done = true; + + /* check flash capability */ + rval = smiapp_read(sensor, SMIAPP_REG_U8_FLASH_MODE_CAPABILITY, &tmp); + sensor->flash_capability = tmp; + if (rval) + goto out_nvm_release; + + smiapp_power_off(sensor); + + return 0; + +out_nvm_release: + device_remove_file(&client->dev, &dev_attr_nvm); + +out_ident_release: + device_remove_file(&client->dev, &dev_attr_ident); + +out_power_off: + smiapp_power_off(sensor); + +out_smiapp_power_on: + if (sensor->platform_data->xshutdown != SMIAPP_NO_XSHUTDOWN) + gpio_free(sensor->platform_data->xshutdown); + + return rval; +} + +static int smiapp_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh) +{ + struct smiapp_subdev *ssd = to_smiapp_subdev(sd); + struct smiapp_sensor *sensor = ssd->sensor; + u32 mbus_code = + smiapp_csi_data_formats[smiapp_pixel_order(sensor)].code; + unsigned int i; + + mutex_lock(&sensor->mutex); + + for (i = 0; i < ssd->npads; i++) { + struct v4l2_mbus_framefmt *try_fmt = + v4l2_subdev_get_try_format(fh, i); + struct v4l2_rect *try_crop = v4l2_subdev_get_try_crop(fh, i); + struct v4l2_rect *try_comp; + + try_fmt->width = sensor->limits[SMIAPP_LIMIT_X_ADDR_MAX] + 1; + try_fmt->height = sensor->limits[SMIAPP_LIMIT_Y_ADDR_MAX] + 1; + try_fmt->code = mbus_code; + + try_crop->top = 0; + try_crop->left = 0; + try_crop->width = try_fmt->width; + try_crop->height = try_fmt->height; + + if (ssd != sensor->pixel_array) + continue; + + try_comp = v4l2_subdev_get_try_compose(fh, i); + *try_comp = *try_crop; + } + + mutex_unlock(&sensor->mutex); + + return smiapp_set_power(sd, 1); +} + +static int smiapp_close(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh) +{ + return smiapp_set_power(sd, 0); +} + +static const struct v4l2_subdev_video_ops smiapp_video_ops = { + .s_stream = smiapp_set_stream, +}; + +static const struct v4l2_subdev_core_ops smiapp_core_ops = { + .s_power = smiapp_set_power, +}; + +static const struct v4l2_subdev_pad_ops smiapp_pad_ops = { + .enum_mbus_code = smiapp_enum_mbus_code, + .get_fmt = smiapp_get_format, + .set_fmt = smiapp_set_format, + .get_selection = smiapp_get_selection, + .set_selection = smiapp_set_selection, +}; + +static const struct v4l2_subdev_sensor_ops smiapp_sensor_ops = { + .g_skip_frames = smiapp_get_skip_frames, +}; + +static const struct v4l2_subdev_ops smiapp_ops = { + .core = &smiapp_core_ops, + .video = &smiapp_video_ops, + .pad = &smiapp_pad_ops, + .sensor = &smiapp_sensor_ops, +}; + +static const struct media_entity_operations smiapp_entity_ops = { + .link_validate = v4l2_subdev_link_validate, +}; + +static const struct v4l2_subdev_internal_ops smiapp_internal_src_ops = { + .registered = smiapp_registered, + .open = smiapp_open, + .close = smiapp_close, +}; + +static const struct v4l2_subdev_internal_ops smiapp_internal_ops = { + .open = smiapp_open, + .close = smiapp_close, +}; + +/* ----------------------------------------------------------------------------- + * I2C Driver + */ + +#ifdef CONFIG_PM + +static int smiapp_suspend(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + struct v4l2_subdev *subdev = i2c_get_clientdata(client); + struct smiapp_sensor *sensor = to_smiapp_sensor(subdev); + bool streaming; + + BUG_ON(mutex_is_locked(&sensor->mutex)); + + if (sensor->power_count == 0) + return 0; + + if (sensor->streaming) + smiapp_stop_streaming(sensor); + + streaming = sensor->streaming; + + smiapp_power_off(sensor); + + /* save state for resume */ + sensor->streaming = streaming; + + return 0; +} + +static int smiapp_resume(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + struct v4l2_subdev *subdev = i2c_get_clientdata(client); + struct smiapp_sensor *sensor = to_smiapp_sensor(subdev); + int rval; + + if (sensor->power_count == 0) + return 0; + + rval = smiapp_power_on(sensor); + if (rval) + return rval; + + if (sensor->streaming) + rval = smiapp_start_streaming(sensor); + + return rval; +} + +#else + +#define smiapp_suspend NULL +#define smiapp_resume NULL + +#endif /* CONFIG_PM */ + +static int smiapp_probe(struct i2c_client *client, + const struct i2c_device_id *devid) +{ + struct smiapp_sensor *sensor; + + if (client->dev.platform_data == NULL) + return -ENODEV; + + sensor = devm_kzalloc(&client->dev, sizeof(*sensor), GFP_KERNEL); + if (sensor == NULL) + return -ENOMEM; + + sensor->platform_data = client->dev.platform_data; + mutex_init(&sensor->mutex); + mutex_init(&sensor->power_mutex); + sensor->src = &sensor->ssds[sensor->ssds_used]; + + v4l2_i2c_subdev_init(&sensor->src->sd, client, &smiapp_ops); + sensor->src->sd.internal_ops = &smiapp_internal_src_ops; + sensor->src->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; + sensor->src->sensor = sensor; + + sensor->src->pads[0].flags = MEDIA_PAD_FL_SOURCE; + return media_entity_init(&sensor->src->sd.entity, 2, + sensor->src->pads, 0); +} + +static int __exit smiapp_remove(struct i2c_client *client) +{ + struct v4l2_subdev *subdev = i2c_get_clientdata(client); + struct smiapp_sensor *sensor = to_smiapp_sensor(subdev); + unsigned int i; + + if (sensor->power_count) { + if (sensor->platform_data->xshutdown != SMIAPP_NO_XSHUTDOWN) + gpio_set_value(sensor->platform_data->xshutdown, 0); + if (sensor->platform_data->set_xclk) + sensor->platform_data->set_xclk(&sensor->src->sd, 0); + else + clk_disable(sensor->ext_clk); + sensor->power_count = 0; + } + + device_remove_file(&client->dev, &dev_attr_ident); + if (sensor->nvm) + device_remove_file(&client->dev, &dev_attr_nvm); + + for (i = 0; i < sensor->ssds_used; i++) { + media_entity_cleanup(&sensor->ssds[i].sd.entity); + v4l2_device_unregister_subdev(&sensor->ssds[i].sd); + } + smiapp_free_controls(sensor); + if (sensor->platform_data->xshutdown != SMIAPP_NO_XSHUTDOWN) + gpio_free(sensor->platform_data->xshutdown); + + return 0; +} + +static const struct i2c_device_id smiapp_id_table[] = { + { SMIAPP_NAME, 0 }, + { }, +}; +MODULE_DEVICE_TABLE(i2c, smiapp_id_table); + +static const struct dev_pm_ops smiapp_pm_ops = { + .suspend = smiapp_suspend, + .resume = smiapp_resume, +}; + +static struct i2c_driver smiapp_i2c_driver = { + .driver = { + .name = SMIAPP_NAME, + .pm = &smiapp_pm_ops, + }, + .probe = smiapp_probe, + .remove = __exit_p(smiapp_remove), + .id_table = smiapp_id_table, +}; + +module_i2c_driver(smiapp_i2c_driver); + +MODULE_AUTHOR("Sakari Ailus <sakari.ailus@maxwell.research.nokia.com>"); +MODULE_DESCRIPTION("Generic SMIA/SMIA++ camera module driver"); +MODULE_LICENSE("GPL"); |