--- /dev/null
+/*
+ em28xx-camera.c - driver for Empia EM25xx/27xx/28xx USB video capture devices
+
+ Copyright (C) 2009 Mauro Carvalho Chehab <mchehab@infradead.org>
+ Copyright (C) 2013 Frank Schäfer <fschaefer.oss@googlemail.com>
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include <linux/i2c.h>
+#include <media/soc_camera.h>
+#include <media/mt9v011.h>
+#include <media/v4l2-clk.h>
+#include <media/v4l2-common.h>
+
+#include "em28xx.h"
+
+/* Possible i2c addresses of Micron sensors */
+static unsigned short micron_sensor_addrs[] = {
+ 0xb8 >> 1, /* MT9V111, MT9V403 */
+ 0xba >> 1, /* MT9M001/011/111/112, MT9V011/012/112, MT9D011 */
+ 0x90 >> 1, /* MT9V012/112, MT9D011 (alternative address) */
+ I2C_CLIENT_END
+};
+
+/* Possible i2c addresses of Omnivision sensors */
+static unsigned short omnivision_sensor_addrs[] = {
+ 0x42 >> 1, /* OV7725, OV7670/60/48 */
+ 0x60 >> 1, /* OV2640, OV9650/53/55 */
+ I2C_CLIENT_END
+};
+
+static struct soc_camera_link camlink = {
+ .bus_id = 0,
+ .flags = 0,
+ .module_name = "em28xx",
+ .unbalanced_power = true,
+};
+
+/* FIXME: Should be replaced by a proper mt9m111 driver */
+static int em28xx_initialize_mt9m111(struct em28xx *dev)
+{
+ int i;
+ unsigned char regs[][3] = {
+ { 0x0d, 0x00, 0x01, }, /* reset and use defaults */
+ { 0x0d, 0x00, 0x00, },
+ { 0x0a, 0x00, 0x21, },
+ { 0x21, 0x04, 0x00, }, /* full readout speed, no row/col skipping */
+ };
+
+ for (i = 0; i < ARRAY_SIZE(regs); i++)
+ i2c_master_send(&dev->i2c_client[dev->def_i2c_bus],
+ ®s[i][0], 3);
+
+ return 0;
+}
+
+/* FIXME: Should be replaced by a proper mt9m001 driver */
+static int em28xx_initialize_mt9m001(struct em28xx *dev)
+{
+ int i;
+ unsigned char regs[][3] = {
+ { 0x0d, 0x00, 0x01, },
+ { 0x0d, 0x00, 0x00, },
+ { 0x04, 0x05, 0x00, }, /* hres = 1280 */
+ { 0x03, 0x04, 0x00, }, /* vres = 1024 */
+ { 0x20, 0x11, 0x00, },
+ { 0x06, 0x00, 0x10, },
+ { 0x2b, 0x00, 0x24, },
+ { 0x2e, 0x00, 0x24, },
+ { 0x35, 0x00, 0x24, },
+ { 0x2d, 0x00, 0x20, },
+ { 0x2c, 0x00, 0x20, },
+ { 0x09, 0x0a, 0xd4, },
+ { 0x35, 0x00, 0x57, },
+ };
+
+ for (i = 0; i < ARRAY_SIZE(regs); i++)
+ i2c_master_send(&dev->i2c_client[dev->def_i2c_bus],
+ ®s[i][0], 3);
+
+ return 0;
+}
+
+/*
+ * Probes Micron sensors with 8 bit address and 16 bit register width
+ */
+static int em28xx_probe_sensor_micron(struct em28xx *dev)
+{
+ int ret, i;
+ char *name;
+ u8 reg;
+ __be16 id_be;
+ u16 id;
+
+ struct i2c_client client = dev->i2c_client[dev->def_i2c_bus];
+
+ dev->em28xx_sensor = EM28XX_NOSENSOR;
+ for (i = 0; micron_sensor_addrs[i] != I2C_CLIENT_END; i++) {
+ client.addr = micron_sensor_addrs[i];
+ /* NOTE: i2c_smbus_read_word_data() doesn't work with BE data */
+ /* Read chip ID from register 0x00 */
+ reg = 0x00;
+ ret = i2c_master_send(&client, ®, 1);
+ if (ret < 0) {
+ if (ret != -ENXIO)
+ em28xx_errdev("couldn't read from i2c device 0x%02x: error %i\n",
+ client.addr << 1, ret);
+ continue;
+ }
+ ret = i2c_master_recv(&client, (u8 *)&id_be, 2);
+ if (ret < 0) {
+ em28xx_errdev("couldn't read from i2c device 0x%02x: error %i\n",
+ client.addr << 1, ret);
+ continue;
+ }
+ id = be16_to_cpu(id_be);
+ /* Read chip ID from register 0xff */
+ reg = 0xff;
+ ret = i2c_master_send(&client, ®, 1);
+ if (ret < 0) {
+ em28xx_errdev("couldn't read from i2c device 0x%02x: error %i\n",
+ client.addr << 1, ret);
+ continue;
+ }
+ ret = i2c_master_recv(&client, (u8 *)&id_be, 2);
+ if (ret < 0) {
+ em28xx_errdev("couldn't read from i2c device 0x%02x: error %i\n",
+ client.addr << 1, ret);
+ continue;
+ }
+ /* Validate chip ID to be sure we have a Micron device */
+ if (id != be16_to_cpu(id_be))
+ continue;
+ /* Check chip ID */
+ id = be16_to_cpu(id_be);
+ switch (id) {
+ case 0x1222:
+ name = "MT9V012"; /* MI370 */ /* 640x480 */
+ break;
+ case 0x1229:
+ name = "MT9V112"; /* 640x480 */
+ break;
+ case 0x1433:
+ name = "MT9M011"; /* 1280x1024 */
+ break;
+ case 0x143a: /* found in the ECS G200 */
+ name = "MT9M111"; /* MI1310 */ /* 1280x1024 */
+ dev->em28xx_sensor = EM28XX_MT9M111;
+ break;
+ case 0x148c:
+ name = "MT9M112"; /* MI1320 */ /* 1280x1024 */
+ break;
+ case 0x1511:
+ name = "MT9D011"; /* MI2010 */ /* 1600x1200 */
+ break;
+ case 0x8232:
+ case 0x8243: /* rev B */
+ name = "MT9V011"; /* MI360 */ /* 640x480 */
+ dev->em28xx_sensor = EM28XX_MT9V011;
+ break;
+ case 0x8431:
+ name = "MT9M001"; /* 1280x1024 */
+ dev->em28xx_sensor = EM28XX_MT9M001;
+ break;
+ default:
+ em28xx_info("unknown Micron sensor detected: 0x%04x\n",
+ id);
+ return 0;
+ }
+
+ if (dev->em28xx_sensor == EM28XX_NOSENSOR)
+ em28xx_info("unsupported sensor detected: %s\n", name);
+ else
+ em28xx_info("sensor %s detected\n", name);
+
+ dev->i2c_client[dev->def_i2c_bus].addr = client.addr;
+ return 0;
+ }
+
+ return -ENODEV;
+}
+
+/*
+ * Probes Omnivision sensors with 8 bit address and register width
+ */
+static int em28xx_probe_sensor_omnivision(struct em28xx *dev)
+{
+ int ret, i;
+ char *name;
+ u8 reg;
+ u16 id;
+ struct i2c_client client = dev->i2c_client[dev->def_i2c_bus];
+
+ dev->em28xx_sensor = EM28XX_NOSENSOR;
+ /* NOTE: these devices have the register auto incrementation disabled
+ * by default, so we have to use single byte reads ! */
+ for (i = 0; omnivision_sensor_addrs[i] != I2C_CLIENT_END; i++) {
+ client.addr = omnivision_sensor_addrs[i];
+ /* Read manufacturer ID from registers 0x1c-0x1d (BE) */
+ reg = 0x1c;
+ ret = i2c_smbus_read_byte_data(&client, reg);
+ if (ret < 0) {
+ if (ret != -ENXIO)
+ em28xx_errdev("couldn't read from i2c device 0x%02x: error %i\n",
+ client.addr << 1, ret);
+ continue;
+ }
+ id = ret << 8;
+ reg = 0x1d;
+ ret = i2c_smbus_read_byte_data(&client, reg);
+ if (ret < 0) {
+ em28xx_errdev("couldn't read from i2c device 0x%02x: error %i\n",
+ client.addr << 1, ret);
+ continue;
+ }
+ id += ret;
+ /* Check manufacturer ID */
+ if (id != 0x7fa2)
+ continue;
+ /* Read product ID from registers 0x0a-0x0b (BE) */
+ reg = 0x0a;
+ ret = i2c_smbus_read_byte_data(&client, reg);
+ if (ret < 0) {
+ em28xx_errdev("couldn't read from i2c device 0x%02x: error %i\n",
+ client.addr << 1, ret);
+ continue;
+ }
+ id = ret << 8;
+ reg = 0x0b;
+ ret = i2c_smbus_read_byte_data(&client, reg);
+ if (ret < 0) {
+ em28xx_errdev("couldn't read from i2c device 0x%02x: error %i\n",
+ client.addr << 1, ret);
+ continue;
+ }
+ id += ret;
+ /* Check product ID */
+ switch (id) {
+ case 0x2642:
+ name = "OV2640";
+ dev->em28xx_sensor = EM28XX_OV2640;
+ break;
+ case 0x7648:
+ name = "OV7648";
+ break;
+ case 0x7660:
+ name = "OV7660";
+ break;
+ case 0x7673:
+ name = "OV7670";
+ break;
+ case 0x7720:
+ name = "OV7720";
+ break;
+ case 0x7721:
+ name = "OV7725";
+ break;
+ case 0x9648: /* Rev 2 */
+ case 0x9649: /* Rev 3 */
+ name = "OV9640";
+ break;
+ case 0x9650:
+ case 0x9652: /* OV9653 */
+ name = "OV9650";
+ break;
+ case 0x9656: /* Rev 4 */
+ case 0x9657: /* Rev 5 */
+ name = "OV9655";
+ break;
+ default:
+ em28xx_info("unknown OmniVision sensor detected: 0x%04x\n",
+ id);
+ return 0;
+ }
+
+ if (dev->em28xx_sensor == EM28XX_NOSENSOR)
+ em28xx_info("unsupported sensor detected: %s\n", name);
+ else
+ em28xx_info("sensor %s detected\n", name);
+
+ dev->i2c_client[dev->def_i2c_bus].addr = client.addr;
+ return 0;
+ }
+
+ return -ENODEV;
+}
+
+int em28xx_detect_sensor(struct em28xx *dev)
+{
+ int ret;
+
+ ret = em28xx_probe_sensor_micron(dev);
+
+ if (dev->em28xx_sensor == EM28XX_NOSENSOR && ret < 0)
+ ret = em28xx_probe_sensor_omnivision(dev);
+
+ /*
+ * NOTE: the Windows driver also probes i2c addresses
+ * 0x22 (Samsung ?) and 0x66 (Kodak ?)
+ */
+
+ if (dev->em28xx_sensor == EM28XX_NOSENSOR && ret < 0) {
+ em28xx_info("No sensor detected\n");
+ return -ENODEV;
+ }
+
+ return 0;
+}
+
+int em28xx_init_camera(struct em28xx *dev)
+{
+ char clk_name[V4L2_SUBDEV_NAME_SIZE];
+ struct i2c_client *client = &dev->i2c_client[dev->def_i2c_bus];
+ struct i2c_adapter *adap = &dev->i2c_adap[dev->def_i2c_bus];
+ struct em28xx_v4l2 *v4l2 = dev->v4l2;
+ int ret = 0;
+
+ v4l2_clk_name_i2c(clk_name, sizeof(clk_name),
+ i2c_adapter_id(adap), client->addr);
+ v4l2->clk = v4l2_clk_register_fixed(clk_name, -EINVAL);
+ if (IS_ERR(v4l2->clk))
+ return PTR_ERR(v4l2->clk);
+
+ switch (dev->em28xx_sensor) {
+ case EM28XX_MT9V011:
+ {
+ struct mt9v011_platform_data pdata;
+ struct i2c_board_info mt9v011_info = {
+ .type = "mt9v011",
+ .addr = client->addr,
+ .platform_data = &pdata,
+ };
+
+ v4l2->sensor_xres = 640;
+ v4l2->sensor_yres = 480;
+
+ /*
+ * FIXME: mt9v011 uses I2S speed as xtal clk - at least with
+ * the Silvercrest cam I have here for testing - for higher
+ * resolutions, a high clock cause horizontal artifacts, so we
+ * need to use a lower xclk frequency.
+ * Yet, it would be possible to adjust xclk depending on the
+ * desired resolution, since this affects directly the
+ * frame rate.
+ */
+ dev->board.xclk = EM28XX_XCLK_FREQUENCY_4_3MHZ;
+ em28xx_write_reg(dev, EM28XX_R0F_XCLK, dev->board.xclk);
+ v4l2->sensor_xtal = 4300000;
+ pdata.xtal = v4l2->sensor_xtal;
+ if (NULL ==
+ v4l2_i2c_new_subdev_board(&v4l2->v4l2_dev, adap,
+ &mt9v011_info, NULL)) {
+ ret = -ENODEV;
+ break;
+ }
+ /* probably means GRGB 16 bit bayer */
+ v4l2->vinmode = 0x0d;
+ v4l2->vinctl = 0x00;
+
+ break;
+ }
+ case EM28XX_MT9M001:
+ v4l2->sensor_xres = 1280;
+ v4l2->sensor_yres = 1024;
+
+ em28xx_initialize_mt9m001(dev);
+
+ /* probably means BGGR 16 bit bayer */
+ v4l2->vinmode = 0x0c;
+ v4l2->vinctl = 0x00;
+
+ break;
+ case EM28XX_MT9M111:
+ v4l2->sensor_xres = 640;
+ v4l2->sensor_yres = 512;
+
+ dev->board.xclk = EM28XX_XCLK_FREQUENCY_48MHZ;
+ em28xx_write_reg(dev, EM28XX_R0F_XCLK, dev->board.xclk);
+ em28xx_initialize_mt9m111(dev);
+
+ v4l2->vinmode = 0x0a;
+ v4l2->vinctl = 0x00;
+
+ break;
+ case EM28XX_OV2640:
+ {
+ struct v4l2_subdev *subdev;
+ struct i2c_board_info ov2640_info = {
+ .type = "ov2640",
+ .flags = I2C_CLIENT_SCCB,
+ .addr = client->addr,
+ .platform_data = &camlink,
+ };
+ struct v4l2_mbus_framefmt fmt;
+
+ /*
+ * FIXME: sensor supports resolutions up to 1600x1200, but
+ * resolution setting/switching needs to be modified to
+ * - switch sensor output resolution (including further
+ * configuration changes)
+ * - adjust bridge xclk
+ * - disable 16 bit (12 bit) output formats on high resolutions
+ */
+ v4l2->sensor_xres = 640;
+ v4l2->sensor_yres = 480;
+
+ subdev =
+ v4l2_i2c_new_subdev_board(&v4l2->v4l2_dev, adap,
+ &ov2640_info, NULL);
+ if (NULL == subdev) {
+ ret = -ENODEV;
+ break;
+ }
+
+ fmt.code = MEDIA_BUS_FMT_YUYV8_2X8;
+ fmt.width = 640;
+ fmt.height = 480;
+ v4l2_subdev_call(subdev, video, s_mbus_fmt, &fmt);
+
+ /* NOTE: for UXGA=1600x1200 switch to 12MHz */
+ dev->board.xclk = EM28XX_XCLK_FREQUENCY_24MHZ;
+ em28xx_write_reg(dev, EM28XX_R0F_XCLK, dev->board.xclk);
+ v4l2->vinmode = 0x08;
+ v4l2->vinctl = 0x00;
+
+ break;
+ }
+ case EM28XX_NOSENSOR:
+ default:
+ ret = -EINVAL;
+ }
+
+ if (ret < 0) {
+ v4l2_clk_unregister_fixed(v4l2->clk);
+ v4l2->clk = NULL;
+ }
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(em28xx_init_camera);
Code Review / kvmfornfv.git / blobdiff