1 files changed, 460 insertions, 0 deletions

diff --git a/drivers/media/video/gspca/m5602/m5602_s5k4aa.c b/drivers/media/video/gspca/m5602/m5602_s5k4aa.c
new file mode 100644
index 00000000000..3a2ae7a2e26
--- /dev/null
+++ b/drivers/media/video/gspca/m5602/m5602_s5k4aa.c
@@ -0,0 +1,460 @@
+/*
+ * Driver for the s5k4aa sensor
+ *
+ * Copyright (C) 2008 Erik Andren
+ * Copyright (C) 2007 Ilyes Gouta. Based on the m5603x Linux Driver Project.
+ * Copyright (C) 2005 m5603x Linux Driver Project <m5602@x3ng.com.br>
+ *
+ * Portions of code to USB interface and ALi driver software,
+ * Copyright (c) 2006 Willem Duinker
+ * v4l2 interface modeled after the V4L2 driver
+ * for SN9C10x PC Camera Controllers
+ *
+ * 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, version 2.
+ *
+ */
+
+#include "m5602_s5k4aa.h"
+
+int s5k4aa_probe(struct sd *sd)
+{
+        u8 prod_id[6] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
+        const u8 expected_prod_id[6] = {0x00, 0x10, 0x00, 0x4b, 0x33, 0x75};
+        int i, err = 0;
+
+        if (force_sensor) {
+                if (force_sensor == S5K4AA_SENSOR) {
+                        info("Forcing a %s sensor", s5k4aa.name);
+                        goto sensor_found;
+                }
+                /* If we want to force another sensor, don't try to probe this
+                 * one */
+                return -ENODEV;
+        }
+
+        info("Probing for a s5k4aa sensor");
+
+        /* Preinit the sensor */
+        for (i = 0; i < ARRAY_SIZE(preinit_s5k4aa) && !err; i++) {
+                u8 data[2] = {0x00, 0x00};
+
+                switch (preinit_s5k4aa[i][0]) {
+                case BRIDGE:
+                        err = m5602_write_bridge(sd,
+                                                 preinit_s5k4aa[i][1],
+                                                 preinit_s5k4aa[i][2]);
+                        break;
+
+                case SENSOR:
+                        data[0] = preinit_s5k4aa[i][2];
+                        err = s5k4aa_write_sensor(sd,
+                                                  preinit_s5k4aa[i][1],
+                                                  data, 1);
+                        break;
+
+                case SENSOR_LONG:
+                        data[0] = preinit_s5k4aa[i][2];
+                        data[1] = preinit_s5k4aa[i][3];
+                        err = s5k4aa_write_sensor(sd,
+                                                  preinit_s5k4aa[i][1],
+                                                  data, 2);
+                        break;
+                default:
+                        info("Invalid stream command, exiting init");
+                        return -EINVAL;
+                }
+        }
+
+        /* Test some registers, but we don't know their exact meaning yet */
+        if (s5k4aa_read_sensor(sd, 0x00, prod_id, sizeof(prod_id)))
+                return -ENODEV;
+
+        if (memcmp(prod_id, expected_prod_id, sizeof(prod_id)))
+                return -ENODEV;
+        else
+                info("Detected a s5k4aa sensor");
+sensor_found:
+        sd->gspca_dev.cam.cam_mode = s5k4aa.modes;
+        sd->gspca_dev.cam.nmodes = s5k4aa.nmodes;
+        return 0;
+}
+
+int s5k4aa_read_sensor(struct sd *sd, const u8 address,
+                       u8 *i2c_data, const u8 len)
+{
+        int err, i;
+
+        do {
+                err = m5602_read_bridge(sd, M5602_XB_I2C_STATUS, i2c_data);
+        } while ((*i2c_data & I2C_BUSY) && !err);
+        if (err < 0)
+                goto out;
+
+        err = m5602_write_bridge(sd, M5602_XB_I2C_DEV_ADDR,
+                                 sd->sensor->i2c_slave_id);
+        if (err < 0)
+                goto out;
+
+        err = m5602_write_bridge(sd, M5602_XB_I2C_REG_ADDR, address);
+        if (err < 0)
+                goto out;
+
+        err = m5602_write_bridge(sd, M5602_XB_I2C_CTRL, 0x18 + len);
+        if (err < 0)
+                goto out;
+
+        do {
+                err = m5602_read_bridge(sd, M5602_XB_I2C_STATUS, i2c_data);
+        } while ((*i2c_data & I2C_BUSY) && !err);
+        if (err < 0)
+                goto out;
+
+        for (i = 0; (i < len) & !err; i++) {
+                err = m5602_read_bridge(sd, M5602_XB_I2C_DATA, &(i2c_data[i]));
+
+                PDEBUG(DBG_TRACE, "Reading sensor register "
+                                  "0x%x containing 0x%x ", address, *i2c_data);
+        }
+out:
+        return (err < 0) ? err : 0;
+}
+
+int s5k4aa_write_sensor(struct sd *sd, const u8 address,
+                        u8 *i2c_data, const u8 len)
+{
+        int err, i;
+        u8 *p;
+        struct usb_device *udev = sd->gspca_dev.dev;
+        __u8 *buf = sd->gspca_dev.usb_buf;
+
+        /* No sensor with a data width larger than 16 bits has yet been seen */
+        if (len > 2 || !len)
+                return -EINVAL;
+
+        memcpy(buf, sensor_urb_skeleton,
+               sizeof(sensor_urb_skeleton));
+
+        buf[11] = sd->sensor->i2c_slave_id;
+        buf[15] = address;
+
+        /* Special case larger sensor writes */
+        p = buf + 16;
+
+        /* Copy a four byte write sequence for each byte to be written to */
+        for (i = 0; i < len; i++) {
+                memcpy(p, sensor_urb_skeleton + 16, 4);
+                p[3] = i2c_data[i];
+                p += 4;
+                PDEBUG(DBG_TRACE, "Writing sensor register 0x%x with 0x%x",
+                       address, i2c_data[i]);
+        }
+
+        /* Copy the tailer */
+        memcpy(p, sensor_urb_skeleton + 20, 4);
+
+        /* Set the total length */
+        p[3] = 0x10 + len;
+
+        err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
+                              0x04, 0x40, 0x19,
+                              0x0000, buf,
+                              20 + len * 4, M5602_URB_MSG_TIMEOUT);
+
+        return (err < 0) ? err : 0;
+}
+
+int s5k4aa_init(struct sd *sd)
+{
+        int i, err = 0;
+
+        for (i = 0; i < ARRAY_SIZE(init_s5k4aa) && !err; i++) {
+                u8 data[2] = {0x00, 0x00};
+
+                switch (init_s5k4aa[i][0]) {
+                case BRIDGE:
+                        err = m5602_write_bridge(sd,
+                                init_s5k4aa[i][1],
+                                init_s5k4aa[i][2]);
+                        break;
+
+                case SENSOR:
+                        data[0] = init_s5k4aa[i][2];
+                        err = s5k4aa_write_sensor(sd,
+                                init_s5k4aa[i][1], data, 1);
+                        break;
+
+                case SENSOR_LONG:
+                        data[0] = init_s5k4aa[i][2];
+                        data[1] = init_s5k4aa[i][3];
+                        err = s5k4aa_write_sensor(sd,
+                                init_s5k4aa[i][1], data, 2);
+                        break;
+                default:
+                        info("Invalid stream command, exiting init");
+                        return -EINVAL;
+                }
+        }
+
+        if (dump_sensor)
+                s5k4aa_dump_registers(sd);
+
+        if (!err && dmi_check_system(s5k4aa_vflip_dmi_table)) {
+                u8 data = 0x02;
+                info("vertical flip quirk active");
+                s5k4aa_write_sensor(sd, S5K4AA_PAGE_MAP, &data, 1);
+                s5k4aa_read_sensor(sd, S5K4AA_READ_MODE, &data, 1);
+                data |= S5K4AA_RM_V_FLIP;
+                data &= ~S5K4AA_RM_H_FLIP;
+                s5k4aa_write_sensor(sd, S5K4AA_READ_MODE, &data, 1);
+
+                /* Decrement COLSTART to preserve color order (BGGR) */
+                s5k4aa_read_sensor(sd, S5K4AA_COLSTART_LO, &data, 1);
+                data--;
+                s5k4aa_write_sensor(sd, S5K4AA_COLSTART_LO, &data, 1);
+
+                /* Increment ROWSTART to preserve color order (BGGR) */
+                s5k4aa_read_sensor(sd, S5K4AA_ROWSTART_LO, &data, 1);
+                data++;
+                s5k4aa_write_sensor(sd, S5K4AA_ROWSTART_LO, &data, 1);
+        }
+
+        return (err < 0) ? err : 0;
+}
+
+int s5k4aa_power_down(struct sd *sd)
+{
+        return 0;
+}
+
+int s5k4aa_get_exposure(struct gspca_dev *gspca_dev, __s32 *val)
+{
+        struct sd *sd = (struct sd *) gspca_dev;
+        u8 data = S5K4AA_PAGE_MAP_2;
+        int err;
+
+        err = s5k4aa_write_sensor(sd, S5K4AA_PAGE_MAP, &data, 1);
+        if (err < 0)
+                goto out;
+
+        err = s5k4aa_read_sensor(sd, S5K4AA_EXPOSURE_HI, &data, 1);
+        if (err < 0)
+                goto out;
+
+        *val = data << 8;
+        err = s5k4aa_read_sensor(sd, S5K4AA_EXPOSURE_LO, &data, 1);
+        *val |= data;
+        PDEBUG(DBG_V4L2_CID, "Read exposure %d", *val);
+out:
+        return (err < 0) ? err : 0;
+}
+
+int s5k4aa_set_exposure(struct gspca_dev *gspca_dev, __s32 val)
+{
+        struct sd *sd = (struct sd *) gspca_dev;
+        u8 data = S5K4AA_PAGE_MAP_2;
+        int err;
+
+        PDEBUG(DBG_V4L2_CID, "Set exposure to %d", val);
+        err = s5k4aa_write_sensor(sd, S5K4AA_PAGE_MAP, &data, 1);
+        if (err < 0)
+                goto out;
+        data = (val >> 8) & 0xff;
+        err = s5k4aa_write_sensor(sd, S5K4AA_EXPOSURE_HI, &data, 1);
+        if (err < 0)
+                goto out;
+        data = val & 0xff;
+        err = s5k4aa_write_sensor(sd, S5K4AA_EXPOSURE_LO, &data, 1);
+out:
+        return (err < 0) ? err : 0;
+}
+
+int s5k4aa_get_vflip(struct gspca_dev *gspca_dev, __s32 *val)
+{
+        struct sd *sd = (struct sd *) gspca_dev;
+        u8 data = S5K4AA_PAGE_MAP_2;
+        int err;
+
+        err = s5k4aa_write_sensor(sd, S5K4AA_PAGE_MAP, &data, 1);
+        if (err < 0)
+                goto out;
+
+        err = s5k4aa_read_sensor(sd, S5K4AA_PAGE_MAP, &data, 1);
+        *val = (data & S5K4AA_RM_V_FLIP) >> 7;
+        PDEBUG(DBG_V4L2_CID, "Read vertical flip %d", *val);
+
+out:
+        return (err < 0) ? err : 0;
+}
+
+int s5k4aa_set_vflip(struct gspca_dev *gspca_dev, __s32 val)
+{
+        struct sd *sd = (struct sd *) gspca_dev;
+        u8 data = S5K4AA_PAGE_MAP_2;
+        int err;
+
+        PDEBUG(DBG_V4L2_CID, "Set vertical flip to %d", val);
+        err = s5k4aa_write_sensor(sd, S5K4AA_PAGE_MAP, &data, 1);
+        if (err < 0)
+                goto out;
+        err = s5k4aa_write_sensor(sd, S5K4AA_READ_MODE, &data, 1);
+        if (err < 0)
+                goto out;
+        data = ((data & ~S5K4AA_RM_V_FLIP)
+                        | ((val & 0x01) << 7));
+        err = s5k4aa_write_sensor(sd, S5K4AA_READ_MODE, &data, 1);
+        if (err < 0)
+                goto out;
+
+        if (val) {
+                err = s5k4aa_read_sensor(sd, S5K4AA_ROWSTART_LO, &data, 1);
+                if (err < 0)
+                        goto out;
+
+                data++;
+                err = s5k4aa_write_sensor(sd, S5K4AA_ROWSTART_LO, &data, 1);
+        } else {
+                err = s5k4aa_read_sensor(sd, S5K4AA_ROWSTART_LO, &data, 1);
+                if (err < 0)
+                        goto out;
+
+                data--;
+                err = s5k4aa_write_sensor(sd, S5K4AA_ROWSTART_LO, &data, 1);
+        }
+out:
+        return (err < 0) ? err : 0;
+}
+
+int s5k4aa_get_hflip(struct gspca_dev *gspca_dev, __s32 *val)
+{
+        struct sd *sd = (struct sd *) gspca_dev;
+        u8 data = S5K4AA_PAGE_MAP_2;
+        int err;
+
+        err = s5k4aa_write_sensor(sd, S5K4AA_PAGE_MAP, &data, 1);
+        if (err < 0)
+                goto out;
+
+        err = s5k4aa_read_sensor(sd, S5K4AA_PAGE_MAP, &data, 1);
+        *val = (data & S5K4AA_RM_H_FLIP) >> 6;
+        PDEBUG(DBG_V4L2_CID, "Read horizontal flip %d", *val);
+out:
+        return (err < 0) ? err : 0;
+}
+
+int s5k4aa_set_hflip(struct gspca_dev *gspca_dev, __s32 val)
+{
+        struct sd *sd = (struct sd *) gspca_dev;
+        u8 data = S5K4AA_PAGE_MAP_2;
+        int err;
+
+        PDEBUG(DBG_V4L2_CID, "Set horizontal flip to %d",
+               val);
+        err = s5k4aa_write_sensor(sd, S5K4AA_PAGE_MAP, &data, 1);
+        if (err < 0)
+                goto out;
+        err = s5k4aa_write_sensor(sd, S5K4AA_READ_MODE, &data, 1);
+        if (err < 0)
+                goto out;
+
+        data = ((data & ~S5K4AA_RM_H_FLIP) | ((val & 0x01) << 6));
+        err = s5k4aa_write_sensor(sd, S5K4AA_READ_MODE, &data, 1);
+        if (err < 0)
+                goto out;
+
+        if (val) {
+                err = s5k4aa_read_sensor(sd, S5K4AA_COLSTART_LO, &data, 1);
+                if (err < 0)
+                        goto out;
+                data++;
+                err = s5k4aa_write_sensor(sd, S5K4AA_COLSTART_LO, &data, 1);
+                if (err < 0)
+                        goto out;
+        } else {
+                err = s5k4aa_read_sensor(sd, S5K4AA_COLSTART_LO, &data, 1);
+                if (err < 0)
+                        goto out;
+                data--;
+                err = s5k4aa_write_sensor(sd, S5K4AA_COLSTART_LO, &data, 1);
+        }
+out:
+        return (err < 0) ? err : 0;
+}
+
+int s5k4aa_get_gain(struct gspca_dev *gspca_dev, __s32 *val)
+{
+        struct sd *sd = (struct sd *) gspca_dev;
+        u8 data = S5K4AA_PAGE_MAP_2;
+        int err;
+
+        err = s5k4aa_write_sensor(sd, S5K4AA_PAGE_MAP, &data, 1);
+        if (err < 0)
+                goto out;
+
+        err = s5k4aa_read_sensor(sd, S5K4AA_GAIN_2, &data, 1);
+        *val = data;
+        PDEBUG(DBG_V4L2_CID, "Read gain %d", *val);
+
+out:
+        return (err < 0) ? err : 0;
+}
+
+int s5k4aa_set_gain(struct gspca_dev *gspca_dev, __s32 val)
+{
+        struct sd *sd = (struct sd *) gspca_dev;
+        u8 data = S5K4AA_PAGE_MAP_2;
+        int err;
+
+        PDEBUG(DBG_V4L2_CID, "Set gain to %d", val);
+        err = s5k4aa_write_sensor(sd, S5K4AA_PAGE_MAP, &data, 1);
+        if (err < 0)
+                goto out;
+
+        data = val & 0xff;
+        err = s5k4aa_write_sensor(sd, S5K4AA_GAIN_2, &data, 1);
+
+out:
+        return (err < 0) ? err : 0;
+}
+
+void s5k4aa_dump_registers(struct sd *sd)
+{
+        int address;
+        u8 page, old_page;
+        s5k4aa_read_sensor(sd, S5K4AA_PAGE_MAP, &old_page, 1);
+        for (page = 0; page < 16; page++) {
+                s5k4aa_write_sensor(sd, S5K4AA_PAGE_MAP, &page, 1);
+                info("Dumping the s5k4aa register state for page 0x%x", page);
+                for (address = 0; address <= 0xff; address++) {
+                        u8 value = 0;
+                        s5k4aa_read_sensor(sd, address, &value, 1);
+                        info("register 0x%x contains 0x%x",
+                             address, value);
+                }
+        }
+        info("s5k4aa register state dump complete");
+
+        for (page = 0; page < 16; page++) {
+                s5k4aa_write_sensor(sd, S5K4AA_PAGE_MAP, &page, 1);
+                info("Probing for which registers that are "
+                     "read/write for page 0x%x", page);
+                for (address = 0; address <= 0xff; address++) {
+                        u8 old_value, ctrl_value, test_value = 0xff;
+
+                        s5k4aa_read_sensor(sd, address, &old_value, 1);
+                        s5k4aa_write_sensor(sd, address, &test_value, 1);
+                        s5k4aa_read_sensor(sd, address, &ctrl_value, 1);
+
+                        if (ctrl_value == test_value)
+                                info("register 0x%x is writeable", address);
+                        else
+                                info("register 0x%x is read only", address);
+
+                        /* Restore original value */
+                        s5k4aa_write_sensor(sd, address, &old_value, 1);
+                }
+        }
+        info("Read/write register probing complete");
+        s5k4aa_write_sensor(sd, S5K4AA_PAGE_MAP, &old_page, 1);
+}