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path: root/drivers/staging/media/omap24xx/tcm825x.c
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Diffstat (limited to 'drivers/staging/media/omap24xx/tcm825x.c')
-rw-r--r--drivers/staging/media/omap24xx/tcm825x.c937
1 files changed, 937 insertions, 0 deletions
diff --git a/drivers/staging/media/omap24xx/tcm825x.c b/drivers/staging/media/omap24xx/tcm825x.c
new file mode 100644
index 000000000000..b1ae8e9c7e14
--- /dev/null
+++ b/drivers/staging/media/omap24xx/tcm825x.c
@@ -0,0 +1,937 @@
+/*
+ * drivers/media/i2c/tcm825x.c
+ *
+ * TCM825X camera sensor driver.
+ *
+ * Copyright (C) 2007 Nokia Corporation.
+ *
+ * Contact: Sakari Ailus <sakari.ailus@nokia.com>
+ *
+ * Based on code from David Cohen <david.cohen@indt.org.br>
+ *
+ * This driver was based on ov9640 sensor driver from MontaVista
+ *
+ * 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/i2c.h>
+#include <linux/module.h>
+#include "v4l2-int-device.h"
+
+#include "tcm825x.h"
+
+/*
+ * The sensor has two fps modes: the lower one just gives half the fps
+ * at the same xclk than the high one.
+ */
+#define MAX_FPS 30
+#define MIN_FPS 8
+#define MAX_HALF_FPS (MAX_FPS / 2)
+#define HIGH_FPS_MODE_LOWER_LIMIT 14
+#define DEFAULT_FPS MAX_HALF_FPS
+
+struct tcm825x_sensor {
+ const struct tcm825x_platform_data *platform_data;
+ struct v4l2_int_device *v4l2_int_device;
+ struct i2c_client *i2c_client;
+ struct v4l2_pix_format pix;
+ struct v4l2_fract timeperframe;
+};
+
+/* list of image formats supported by TCM825X sensor */
+static const struct v4l2_fmtdesc tcm825x_formats[] = {
+ {
+ .description = "YUYV (YUV 4:2:2), packed",
+ .pixelformat = V4L2_PIX_FMT_UYVY,
+ }, {
+ /* Note: V4L2 defines RGB565 as:
+ *
+ * Byte 0 Byte 1
+ * g2 g1 g0 r4 r3 r2 r1 r0 b4 b3 b2 b1 b0 g5 g4 g3
+ *
+ * We interpret RGB565 as:
+ *
+ * Byte 0 Byte 1
+ * g2 g1 g0 b4 b3 b2 b1 b0 r4 r3 r2 r1 r0 g5 g4 g3
+ */
+ .description = "RGB565, le",
+ .pixelformat = V4L2_PIX_FMT_RGB565,
+ },
+};
+
+#define TCM825X_NUM_CAPTURE_FORMATS ARRAY_SIZE(tcm825x_formats)
+
+/*
+ * TCM825X register configuration for all combinations of pixel format and
+ * image size
+ */
+static const struct tcm825x_reg subqcif = { 0x20, TCM825X_PICSIZ };
+static const struct tcm825x_reg qcif = { 0x18, TCM825X_PICSIZ };
+static const struct tcm825x_reg cif = { 0x14, TCM825X_PICSIZ };
+static const struct tcm825x_reg qqvga = { 0x0c, TCM825X_PICSIZ };
+static const struct tcm825x_reg qvga = { 0x04, TCM825X_PICSIZ };
+static const struct tcm825x_reg vga = { 0x00, TCM825X_PICSIZ };
+
+static const struct tcm825x_reg yuv422 = { 0x00, TCM825X_PICFMT };
+static const struct tcm825x_reg rgb565 = { 0x02, TCM825X_PICFMT };
+
+/* Our own specific controls */
+#define V4L2_CID_ALC V4L2_CID_PRIVATE_BASE
+#define V4L2_CID_H_EDGE_EN V4L2_CID_PRIVATE_BASE + 1
+#define V4L2_CID_V_EDGE_EN V4L2_CID_PRIVATE_BASE + 2
+#define V4L2_CID_LENS V4L2_CID_PRIVATE_BASE + 3
+#define V4L2_CID_MAX_EXPOSURE_TIME V4L2_CID_PRIVATE_BASE + 4
+#define V4L2_CID_LAST_PRIV V4L2_CID_MAX_EXPOSURE_TIME
+
+/* Video controls */
+static struct vcontrol {
+ struct v4l2_queryctrl qc;
+ u16 reg;
+ u16 start_bit;
+} video_control[] = {
+ {
+ {
+ .id = V4L2_CID_GAIN,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .name = "Gain",
+ .minimum = 0,
+ .maximum = 63,
+ .step = 1,
+ },
+ .reg = TCM825X_AG,
+ .start_bit = 0,
+ },
+ {
+ {
+ .id = V4L2_CID_RED_BALANCE,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .name = "Red Balance",
+ .minimum = 0,
+ .maximum = 255,
+ .step = 1,
+ },
+ .reg = TCM825X_MRG,
+ .start_bit = 0,
+ },
+ {
+ {
+ .id = V4L2_CID_BLUE_BALANCE,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .name = "Blue Balance",
+ .minimum = 0,
+ .maximum = 255,
+ .step = 1,
+ },
+ .reg = TCM825X_MBG,
+ .start_bit = 0,
+ },
+ {
+ {
+ .id = V4L2_CID_AUTO_WHITE_BALANCE,
+ .type = V4L2_CTRL_TYPE_BOOLEAN,
+ .name = "Auto White Balance",
+ .minimum = 0,
+ .maximum = 1,
+ .step = 0,
+ },
+ .reg = TCM825X_AWBSW,
+ .start_bit = 7,
+ },
+ {
+ {
+ .id = V4L2_CID_EXPOSURE,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .name = "Exposure Time",
+ .minimum = 0,
+ .maximum = 0x1fff,
+ .step = 1,
+ },
+ .reg = TCM825X_ESRSPD_U,
+ .start_bit = 0,
+ },
+ {
+ {
+ .id = V4L2_CID_HFLIP,
+ .type = V4L2_CTRL_TYPE_BOOLEAN,
+ .name = "Mirror Image",
+ .minimum = 0,
+ .maximum = 1,
+ .step = 0,
+ },
+ .reg = TCM825X_H_INV,
+ .start_bit = 6,
+ },
+ {
+ {
+ .id = V4L2_CID_VFLIP,
+ .type = V4L2_CTRL_TYPE_BOOLEAN,
+ .name = "Vertical Flip",
+ .minimum = 0,
+ .maximum = 1,
+ .step = 0,
+ },
+ .reg = TCM825X_V_INV,
+ .start_bit = 7,
+ },
+ /* Private controls */
+ {
+ {
+ .id = V4L2_CID_ALC,
+ .type = V4L2_CTRL_TYPE_BOOLEAN,
+ .name = "Auto Luminance Control",
+ .minimum = 0,
+ .maximum = 1,
+ .step = 0,
+ },
+ .reg = TCM825X_ALCSW,
+ .start_bit = 7,
+ },
+ {
+ {
+ .id = V4L2_CID_H_EDGE_EN,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .name = "Horizontal Edge Enhancement",
+ .minimum = 0,
+ .maximum = 0xff,
+ .step = 1,
+ },
+ .reg = TCM825X_HDTG,
+ .start_bit = 0,
+ },
+ {
+ {
+ .id = V4L2_CID_V_EDGE_EN,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .name = "Vertical Edge Enhancement",
+ .minimum = 0,
+ .maximum = 0xff,
+ .step = 1,
+ },
+ .reg = TCM825X_VDTG,
+ .start_bit = 0,
+ },
+ {
+ {
+ .id = V4L2_CID_LENS,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .name = "Lens Shading Compensation",
+ .minimum = 0,
+ .maximum = 0x3f,
+ .step = 1,
+ },
+ .reg = TCM825X_LENS,
+ .start_bit = 0,
+ },
+ {
+ {
+ .id = V4L2_CID_MAX_EXPOSURE_TIME,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .name = "Maximum Exposure Time",
+ .minimum = 0,
+ .maximum = 0x3,
+ .step = 1,
+ },
+ .reg = TCM825X_ESRLIM,
+ .start_bit = 5,
+ },
+};
+
+
+static const struct tcm825x_reg *tcm825x_siz_reg[NUM_IMAGE_SIZES] =
+{ &subqcif, &qqvga, &qcif, &qvga, &cif, &vga };
+
+static const struct tcm825x_reg *tcm825x_fmt_reg[NUM_PIXEL_FORMATS] =
+{ &yuv422, &rgb565 };
+
+/*
+ * Read a value from a register in an TCM825X sensor device. The value is
+ * returned in 'val'.
+ * Returns zero if successful, or non-zero otherwise.
+ */
+static int tcm825x_read_reg(struct i2c_client *client, int reg)
+{
+ int err;
+ struct i2c_msg msg[2];
+ u8 reg_buf, data_buf = 0;
+
+ if (!client->adapter)
+ return -ENODEV;
+
+ msg[0].addr = client->addr;
+ msg[0].flags = 0;
+ msg[0].len = 1;
+ msg[0].buf = &reg_buf;
+ msg[1].addr = client->addr;
+ msg[1].flags = I2C_M_RD;
+ msg[1].len = 1;
+ msg[1].buf = &data_buf;
+
+ reg_buf = reg;
+
+ err = i2c_transfer(client->adapter, msg, 2);
+ if (err < 0)
+ return err;
+ return data_buf;
+}
+
+/*
+ * Write a value to a register in an TCM825X sensor device.
+ * Returns zero if successful, or non-zero otherwise.
+ */
+static int tcm825x_write_reg(struct i2c_client *client, u8 reg, u8 val)
+{
+ int err;
+ struct i2c_msg msg[1];
+ unsigned char data[2];
+
+ if (!client->adapter)
+ return -ENODEV;
+
+ msg->addr = client->addr;
+ msg->flags = 0;
+ msg->len = 2;
+ msg->buf = data;
+ data[0] = reg;
+ data[1] = val;
+ err = i2c_transfer(client->adapter, msg, 1);
+ if (err >= 0)
+ return 0;
+ return err;
+}
+
+static int __tcm825x_write_reg_mask(struct i2c_client *client,
+ u8 reg, u8 val, u8 mask)
+{
+ int rc;
+
+ /* need to do read - modify - write */
+ rc = tcm825x_read_reg(client, reg);
+ if (rc < 0)
+ return rc;
+
+ rc &= (~mask); /* Clear the masked bits */
+ val &= mask; /* Enforce mask on value */
+ val |= rc;
+
+ /* write the new value to the register */
+ rc = tcm825x_write_reg(client, reg, val);
+ if (rc)
+ return rc;
+
+ return 0;
+}
+
+#define tcm825x_write_reg_mask(client, regmask, val) \
+ __tcm825x_write_reg_mask(client, TCM825X_ADDR((regmask)), val, \
+ TCM825X_MASK((regmask)))
+
+
+/*
+ * Initialize a list of TCM825X registers.
+ * The list of registers is terminated by the pair of values
+ * { TCM825X_REG_TERM, TCM825X_VAL_TERM }.
+ * Returns zero if successful, or non-zero otherwise.
+ */
+static int tcm825x_write_default_regs(struct i2c_client *client,
+ const struct tcm825x_reg *reglist)
+{
+ int err;
+ const struct tcm825x_reg *next = reglist;
+
+ while (!((next->reg == TCM825X_REG_TERM)
+ && (next->val == TCM825X_VAL_TERM))) {
+ err = tcm825x_write_reg(client, next->reg, next->val);
+ if (err) {
+ dev_err(&client->dev, "register writing failed\n");
+ return err;
+ }
+ next++;
+ }
+
+ return 0;
+}
+
+static struct vcontrol *find_vctrl(int id)
+{
+ int i;
+
+ if (id < V4L2_CID_BASE)
+ return NULL;
+
+ for (i = 0; i < ARRAY_SIZE(video_control); i++)
+ if (video_control[i].qc.id == id)
+ return &video_control[i];
+
+ return NULL;
+}
+
+/*
+ * Find the best match for a requested image capture size. The best match
+ * is chosen as the nearest match that has the same number or fewer pixels
+ * as the requested size, or the smallest image size if the requested size
+ * has fewer pixels than the smallest image.
+ */
+static enum image_size tcm825x_find_size(struct v4l2_int_device *s,
+ unsigned int width,
+ unsigned int height)
+{
+ enum image_size isize;
+ unsigned long pixels = width * height;
+ struct tcm825x_sensor *sensor = s->priv;
+
+ for (isize = subQCIF; isize < VGA; isize++) {
+ if (tcm825x_sizes[isize + 1].height
+ * tcm825x_sizes[isize + 1].width > pixels) {
+ dev_dbg(&sensor->i2c_client->dev, "size %d\n", isize);
+
+ return isize;
+ }
+ }
+
+ dev_dbg(&sensor->i2c_client->dev, "format default VGA\n");
+
+ return VGA;
+}
+
+/*
+ * Configure the TCM825X for current image size, pixel format, and
+ * frame period. fper is the frame period (in seconds) expressed as a
+ * fraction. Returns zero if successful, or non-zero otherwise. The
+ * actual frame period is returned in fper.
+ */
+static int tcm825x_configure(struct v4l2_int_device *s)
+{
+ struct tcm825x_sensor *sensor = s->priv;
+ struct v4l2_pix_format *pix = &sensor->pix;
+ enum image_size isize = tcm825x_find_size(s, pix->width, pix->height);
+ struct v4l2_fract *fper = &sensor->timeperframe;
+ enum pixel_format pfmt;
+ int err;
+ u32 tgt_fps;
+ u8 val;
+
+ /* common register initialization */
+ err = tcm825x_write_default_regs(
+ sensor->i2c_client, sensor->platform_data->default_regs());
+ if (err)
+ return err;
+
+ /* configure image size */
+ val = tcm825x_siz_reg[isize]->val;
+ dev_dbg(&sensor->i2c_client->dev,
+ "configuring image size %d\n", isize);
+ err = tcm825x_write_reg_mask(sensor->i2c_client,
+ tcm825x_siz_reg[isize]->reg, val);
+ if (err)
+ return err;
+
+ /* configure pixel format */
+ switch (pix->pixelformat) {
+ default:
+ case V4L2_PIX_FMT_RGB565:
+ pfmt = RGB565;
+ break;
+ case V4L2_PIX_FMT_UYVY:
+ pfmt = YUV422;
+ break;
+ }
+
+ dev_dbg(&sensor->i2c_client->dev,
+ "configuring pixel format %d\n", pfmt);
+ val = tcm825x_fmt_reg[pfmt]->val;
+
+ err = tcm825x_write_reg_mask(sensor->i2c_client,
+ tcm825x_fmt_reg[pfmt]->reg, val);
+ if (err)
+ return err;
+
+ /*
+ * For frame rate < 15, the FPS reg (addr 0x02, bit 7) must be
+ * set. Frame rate will be halved from the normal.
+ */
+ tgt_fps = fper->denominator / fper->numerator;
+ if (tgt_fps <= HIGH_FPS_MODE_LOWER_LIMIT) {
+ val = tcm825x_read_reg(sensor->i2c_client, 0x02);
+ val |= 0x80;
+ tcm825x_write_reg(sensor->i2c_client, 0x02, val);
+ }
+
+ return 0;
+}
+
+static int ioctl_queryctrl(struct v4l2_int_device *s,
+ struct v4l2_queryctrl *qc)
+{
+ struct vcontrol *control;
+
+ control = find_vctrl(qc->id);
+
+ if (control == NULL)
+ return -EINVAL;
+
+ *qc = control->qc;
+
+ return 0;
+}
+
+static int ioctl_g_ctrl(struct v4l2_int_device *s,
+ struct v4l2_control *vc)
+{
+ struct tcm825x_sensor *sensor = s->priv;
+ struct i2c_client *client = sensor->i2c_client;
+ int val, r;
+ struct vcontrol *lvc;
+
+ /* exposure time is special, spread across 2 registers */
+ if (vc->id == V4L2_CID_EXPOSURE) {
+ int val_lower, val_upper;
+
+ val_upper = tcm825x_read_reg(client,
+ TCM825X_ADDR(TCM825X_ESRSPD_U));
+ if (val_upper < 0)
+ return val_upper;
+ val_lower = tcm825x_read_reg(client,
+ TCM825X_ADDR(TCM825X_ESRSPD_L));
+ if (val_lower < 0)
+ return val_lower;
+
+ vc->value = ((val_upper & 0x1f) << 8) | (val_lower);
+ return 0;
+ }
+
+ lvc = find_vctrl(vc->id);
+ if (lvc == NULL)
+ return -EINVAL;
+
+ r = tcm825x_read_reg(client, TCM825X_ADDR(lvc->reg));
+ if (r < 0)
+ return r;
+ val = r & TCM825X_MASK(lvc->reg);
+ val >>= lvc->start_bit;
+
+ if (val < 0)
+ return val;
+
+ if (vc->id == V4L2_CID_HFLIP || vc->id == V4L2_CID_VFLIP)
+ val ^= sensor->platform_data->is_upside_down();
+
+ vc->value = val;
+ return 0;
+}
+
+static int ioctl_s_ctrl(struct v4l2_int_device *s,
+ struct v4l2_control *vc)
+{
+ struct tcm825x_sensor *sensor = s->priv;
+ struct i2c_client *client = sensor->i2c_client;
+ struct vcontrol *lvc;
+ int val = vc->value;
+
+ /* exposure time is special, spread across 2 registers */
+ if (vc->id == V4L2_CID_EXPOSURE) {
+ int val_lower, val_upper;
+ val_lower = val & TCM825X_MASK(TCM825X_ESRSPD_L);
+ val_upper = (val >> 8) & TCM825X_MASK(TCM825X_ESRSPD_U);
+
+ if (tcm825x_write_reg_mask(client,
+ TCM825X_ESRSPD_U, val_upper))
+ return -EIO;
+
+ if (tcm825x_write_reg_mask(client,
+ TCM825X_ESRSPD_L, val_lower))
+ return -EIO;
+
+ return 0;
+ }
+
+ lvc = find_vctrl(vc->id);
+ if (lvc == NULL)
+ return -EINVAL;
+
+ if (vc->id == V4L2_CID_HFLIP || vc->id == V4L2_CID_VFLIP)
+ val ^= sensor->platform_data->is_upside_down();
+
+ val = val << lvc->start_bit;
+ if (tcm825x_write_reg_mask(client, lvc->reg, val))
+ return -EIO;
+
+ return 0;
+}
+
+static int ioctl_enum_fmt_cap(struct v4l2_int_device *s,
+ struct v4l2_fmtdesc *fmt)
+{
+ int index = fmt->index;
+
+ switch (fmt->type) {
+ case V4L2_BUF_TYPE_VIDEO_CAPTURE:
+ if (index >= TCM825X_NUM_CAPTURE_FORMATS)
+ return -EINVAL;
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ fmt->flags = tcm825x_formats[index].flags;
+ strlcpy(fmt->description, tcm825x_formats[index].description,
+ sizeof(fmt->description));
+ fmt->pixelformat = tcm825x_formats[index].pixelformat;
+
+ return 0;
+}
+
+static int ioctl_try_fmt_cap(struct v4l2_int_device *s,
+ struct v4l2_format *f)
+{
+ struct tcm825x_sensor *sensor = s->priv;
+ enum image_size isize;
+ int ifmt;
+ struct v4l2_pix_format *pix = &f->fmt.pix;
+
+ isize = tcm825x_find_size(s, pix->width, pix->height);
+ dev_dbg(&sensor->i2c_client->dev, "isize = %d num_capture = %lu\n",
+ isize, (unsigned long)TCM825X_NUM_CAPTURE_FORMATS);
+
+ pix->width = tcm825x_sizes[isize].width;
+ pix->height = tcm825x_sizes[isize].height;
+
+ for (ifmt = 0; ifmt < TCM825X_NUM_CAPTURE_FORMATS; ifmt++)
+ if (pix->pixelformat == tcm825x_formats[ifmt].pixelformat)
+ break;
+
+ if (ifmt == TCM825X_NUM_CAPTURE_FORMATS)
+ ifmt = 0; /* Default = YUV 4:2:2 */
+
+ pix->pixelformat = tcm825x_formats[ifmt].pixelformat;
+ pix->field = V4L2_FIELD_NONE;
+ pix->bytesperline = pix->width * TCM825X_BYTES_PER_PIXEL;
+ pix->sizeimage = pix->bytesperline * pix->height;
+ pix->priv = 0;
+ dev_dbg(&sensor->i2c_client->dev, "format = 0x%08x\n",
+ pix->pixelformat);
+
+ switch (pix->pixelformat) {
+ case V4L2_PIX_FMT_UYVY:
+ default:
+ pix->colorspace = V4L2_COLORSPACE_JPEG;
+ break;
+ case V4L2_PIX_FMT_RGB565:
+ pix->colorspace = V4L2_COLORSPACE_SRGB;
+ break;
+ }
+
+ return 0;
+}
+
+static int ioctl_s_fmt_cap(struct v4l2_int_device *s,
+ struct v4l2_format *f)
+{
+ struct tcm825x_sensor *sensor = s->priv;
+ struct v4l2_pix_format *pix = &f->fmt.pix;
+ int rval;
+
+ rval = ioctl_try_fmt_cap(s, f);
+ if (rval)
+ return rval;
+
+ rval = tcm825x_configure(s);
+
+ sensor->pix = *pix;
+
+ return rval;
+}
+
+static int ioctl_g_fmt_cap(struct v4l2_int_device *s,
+ struct v4l2_format *f)
+{
+ struct tcm825x_sensor *sensor = s->priv;
+
+ f->fmt.pix = sensor->pix;
+
+ return 0;
+}
+
+static int ioctl_g_parm(struct v4l2_int_device *s,
+ struct v4l2_streamparm *a)
+{
+ struct tcm825x_sensor *sensor = s->priv;
+ struct v4l2_captureparm *cparm = &a->parm.capture;
+
+ if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+ return -EINVAL;
+
+ memset(a, 0, sizeof(*a));
+ a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+
+ cparm->capability = V4L2_CAP_TIMEPERFRAME;
+ cparm->timeperframe = sensor->timeperframe;
+
+ return 0;
+}
+
+static int ioctl_s_parm(struct v4l2_int_device *s,
+ struct v4l2_streamparm *a)
+{
+ struct tcm825x_sensor *sensor = s->priv;
+ struct v4l2_fract *timeperframe = &a->parm.capture.timeperframe;
+ u32 tgt_fps; /* target frames per secound */
+ int rval;
+
+ if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+ return -EINVAL;
+
+ if ((timeperframe->numerator == 0)
+ || (timeperframe->denominator == 0)) {
+ timeperframe->denominator = DEFAULT_FPS;
+ timeperframe->numerator = 1;
+ }
+
+ tgt_fps = timeperframe->denominator / timeperframe->numerator;
+
+ if (tgt_fps > MAX_FPS) {
+ timeperframe->denominator = MAX_FPS;
+ timeperframe->numerator = 1;
+ } else if (tgt_fps < MIN_FPS) {
+ timeperframe->denominator = MIN_FPS;
+ timeperframe->numerator = 1;
+ }
+
+ sensor->timeperframe = *timeperframe;
+
+ rval = tcm825x_configure(s);
+
+ return rval;
+}
+
+static int ioctl_s_power(struct v4l2_int_device *s, int on)
+{
+ struct tcm825x_sensor *sensor = s->priv;
+
+ return sensor->platform_data->power_set(on);
+}
+
+/*
+ * Given the image capture format in pix, the nominal frame period in
+ * timeperframe, calculate the required xclk frequency.
+ *
+ * TCM825X input frequency characteristics are:
+ * Minimum 11.9 MHz, Typical 24.57 MHz and maximum 25/27 MHz
+ */
+
+static int ioctl_g_ifparm(struct v4l2_int_device *s, struct v4l2_ifparm *p)
+{
+ struct tcm825x_sensor *sensor = s->priv;
+ struct v4l2_fract *timeperframe = &sensor->timeperframe;
+ u32 tgt_xclk; /* target xclk */
+ u32 tgt_fps; /* target frames per secound */
+ int rval;
+
+ rval = sensor->platform_data->ifparm(p);
+ if (rval)
+ return rval;
+
+ tgt_fps = timeperframe->denominator / timeperframe->numerator;
+
+ tgt_xclk = (tgt_fps <= HIGH_FPS_MODE_LOWER_LIMIT) ?
+ (2457 * tgt_fps) / MAX_HALF_FPS :
+ (2457 * tgt_fps) / MAX_FPS;
+ tgt_xclk *= 10000;
+
+ tgt_xclk = min(tgt_xclk, (u32)TCM825X_XCLK_MAX);
+ tgt_xclk = max(tgt_xclk, (u32)TCM825X_XCLK_MIN);
+
+ p->u.bt656.clock_curr = tgt_xclk;
+
+ return 0;
+}
+
+static int ioctl_g_needs_reset(struct v4l2_int_device *s, void *buf)
+{
+ struct tcm825x_sensor *sensor = s->priv;
+
+ return sensor->platform_data->needs_reset(s, buf, &sensor->pix);
+}
+
+static int ioctl_reset(struct v4l2_int_device *s)
+{
+ return -EBUSY;
+}
+
+static int ioctl_init(struct v4l2_int_device *s)
+{
+ return tcm825x_configure(s);
+}
+
+static int ioctl_dev_exit(struct v4l2_int_device *s)
+{
+ return 0;
+}
+
+static int ioctl_dev_init(struct v4l2_int_device *s)
+{
+ struct tcm825x_sensor *sensor = s->priv;
+ int r;
+
+ r = tcm825x_read_reg(sensor->i2c_client, 0x01);
+ if (r < 0)
+ return r;
+ if (r == 0) {
+ dev_err(&sensor->i2c_client->dev, "device not detected\n");
+ return -EIO;
+ }
+ return 0;
+}
+
+static struct v4l2_int_ioctl_desc tcm825x_ioctl_desc[] = {
+ { vidioc_int_dev_init_num,
+ (v4l2_int_ioctl_func *)ioctl_dev_init },
+ { vidioc_int_dev_exit_num,
+ (v4l2_int_ioctl_func *)ioctl_dev_exit },
+ { vidioc_int_s_power_num,
+ (v4l2_int_ioctl_func *)ioctl_s_power },
+ { vidioc_int_g_ifparm_num,
+ (v4l2_int_ioctl_func *)ioctl_g_ifparm },
+ { vidioc_int_g_needs_reset_num,
+ (v4l2_int_ioctl_func *)ioctl_g_needs_reset },
+ { vidioc_int_reset_num,
+ (v4l2_int_ioctl_func *)ioctl_reset },
+ { vidioc_int_init_num,
+ (v4l2_int_ioctl_func *)ioctl_init },
+ { vidioc_int_enum_fmt_cap_num,
+ (v4l2_int_ioctl_func *)ioctl_enum_fmt_cap },
+ { vidioc_int_try_fmt_cap_num,
+ (v4l2_int_ioctl_func *)ioctl_try_fmt_cap },
+ { vidioc_int_g_fmt_cap_num,
+ (v4l2_int_ioctl_func *)ioctl_g_fmt_cap },
+ { vidioc_int_s_fmt_cap_num,
+ (v4l2_int_ioctl_func *)ioctl_s_fmt_cap },
+ { vidioc_int_g_parm_num,
+ (v4l2_int_ioctl_func *)ioctl_g_parm },
+ { vidioc_int_s_parm_num,
+ (v4l2_int_ioctl_func *)ioctl_s_parm },
+ { vidioc_int_queryctrl_num,
+ (v4l2_int_ioctl_func *)ioctl_queryctrl },
+ { vidioc_int_g_ctrl_num,
+ (v4l2_int_ioctl_func *)ioctl_g_ctrl },
+ { vidioc_int_s_ctrl_num,
+ (v4l2_int_ioctl_func *)ioctl_s_ctrl },
+};
+
+static struct v4l2_int_slave tcm825x_slave = {
+ .ioctls = tcm825x_ioctl_desc,
+ .num_ioctls = ARRAY_SIZE(tcm825x_ioctl_desc),
+};
+
+static struct tcm825x_sensor tcm825x;
+
+static struct v4l2_int_device tcm825x_int_device = {
+ .module = THIS_MODULE,
+ .name = TCM825X_NAME,
+ .priv = &tcm825x,
+ .type = v4l2_int_type_slave,
+ .u = {
+ .slave = &tcm825x_slave,
+ },
+};
+
+static int tcm825x_probe(struct i2c_client *client,
+ const struct i2c_device_id *did)
+{
+ struct tcm825x_sensor *sensor = &tcm825x;
+
+ if (i2c_get_clientdata(client))
+ return -EBUSY;
+
+ sensor->platform_data = client->dev.platform_data;
+
+ if (sensor->platform_data == NULL
+ || !sensor->platform_data->is_okay())
+ return -ENODEV;
+
+ sensor->v4l2_int_device = &tcm825x_int_device;
+
+ sensor->i2c_client = client;
+ i2c_set_clientdata(client, sensor);
+
+ /* Make the default capture format QVGA RGB565 */
+ sensor->pix.width = tcm825x_sizes[QVGA].width;
+ sensor->pix.height = tcm825x_sizes[QVGA].height;
+ sensor->pix.pixelformat = V4L2_PIX_FMT_RGB565;
+
+ return v4l2_int_device_register(sensor->v4l2_int_device);
+}
+
+static int tcm825x_remove(struct i2c_client *client)
+{
+ struct tcm825x_sensor *sensor = i2c_get_clientdata(client);
+
+ if (!client->adapter)
+ return -ENODEV; /* our client isn't attached */
+
+ v4l2_int_device_unregister(sensor->v4l2_int_device);
+
+ return 0;
+}
+
+static const struct i2c_device_id tcm825x_id[] = {
+ { "tcm825x", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, tcm825x_id);
+
+static struct i2c_driver tcm825x_i2c_driver = {
+ .driver = {
+ .name = TCM825X_NAME,
+ },
+ .probe = tcm825x_probe,
+ .remove = tcm825x_remove,
+ .id_table = tcm825x_id,
+};
+
+static struct tcm825x_sensor tcm825x = {
+ .timeperframe = {
+ .numerator = 1,
+ .denominator = DEFAULT_FPS,
+ },
+};
+
+static int __init tcm825x_init(void)
+{
+ int rval;
+
+ rval = i2c_add_driver(&tcm825x_i2c_driver);
+ if (rval)
+ printk(KERN_INFO "%s: failed registering " TCM825X_NAME "\n",
+ __func__);
+
+ return rval;
+}
+
+static void __exit tcm825x_exit(void)
+{
+ i2c_del_driver(&tcm825x_i2c_driver);
+}
+
+/*
+ * FIXME: Menelaus isn't ready (?) at module_init stage, so use
+ * late_initcall for now.
+ */
+late_initcall(tcm825x_init);
+module_exit(tcm825x_exit);
+
+MODULE_AUTHOR("Sakari Ailus <sakari.ailus@nokia.com>");
+MODULE_DESCRIPTION("TCM825x camera sensor driver");
+MODULE_LICENSE("GPL");
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.