V4L/DVB (3665): Add new NEC uPD64031A and uPD64083 i2c drivers

- Add support for the uPD64031A NEC Electronics Ghost Reduction i2c device
- Add support for the uPD6408x NEC Electronics 3-Dimensional Y/C separation
  i2c device.

Signed-off-by: Takahiro Adachi <tadachi@tadachi-net.com>
Signed-off-by: Takeru Komoriya <komoriya@paken.org>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 287 insertions, 0 deletions

diff --git a/drivers/media/video/upd64031a.c b/drivers/media/video/upd64031a.c
new file mode 100644
index 000000000000..bab5beadc6ae
--- /dev/null
+++ b/drivers/media/video/upd64031a.c
@@ -0,0 +1,287 @@
+/*
+ * upd64031A - NEC Electronics Ghost Reduction for NTSC in Japan
+ *
+ * 2003 by T.Adachi <tadachi@tadachi-net.com>
+ * 2003 by Takeru KOMORIYA <komoriya@paken.org>
+ * 2006 by Hans Verkuil <hverkuil@xs4all.nl>
+ *
+ * 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/version.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/i2c.h>
+#include <linux/videodev2.h>
+#include <media/v4l2-common.h>
+#include <media/upd64031a.h>
+
+// --------------------- read registers functions define -----------------------
+
+/* bit masks */
+#define GR_MODE_MASK              0xc0
+#define DIRECT_3DYCS_CONNECT_MASK 0xc0
+#define SYNC_CIRCUIT_MASK         0xa0
+
+// -----------------------------------------------------------------------------
+
+MODULE_DESCRIPTION("uPD64031A driver");
+MODULE_AUTHOR("T. Adachi, Takeru KOMORIYA, Hans Verkuil");
+MODULE_LICENSE("GPL");
+
+static int debug = 0;
+module_param(debug, int, 0644);
+
+MODULE_PARM_DESC(debug, "Debug level (0-1)");
+
+static unsigned short normal_i2c[] = { 0x24 >> 1, 0x26 >> 1, I2C_CLIENT_END };
+
+
+I2C_CLIENT_INSMOD;
+
+enum {
+        R00 = 0, R01, R02, R03, R04,
+        R05, R06, R07, R08, R09,
+        R0A, R0B, R0C, R0D, R0E, R0F,
+        /* unused registers
+         R10, R11, R12, R13, R14,
+         R15, R16, R17,
+         */
+        TOT_REGS
+};
+
+struct upd64031a_state {
+        u8 regs[TOT_REGS];
+        u8 gr_mode;
+        u8 direct_3dycs_connect;
+        u8 ext_comp_sync;
+        u8 ext_vert_sync;
+};
+
+static u8 upd64031a_init[] = {
+        0x00, 0xb8, 0x48, 0xd2, 0xe6,
+        0x03, 0x10, 0x0b, 0xaf, 0x7f,
+        0x00, 0x00, 0x1d, 0x5e, 0x00,
+        0xd0
+};
+
+/* ------------------------------------------------------------------------ */
+
+static u8 upd64031a_read(struct i2c_client *client, u8 reg)
+{
+        u8 buf[2];
+
+        if (reg >= sizeof(buf))
+                return 0xff;
+        i2c_master_recv(client, buf, 2);
+        return buf[reg];
+}
+
+/* ------------------------------------------------------------------------ */
+
+static void upd64031a_write(struct i2c_client *client, u8 reg, u8 val)
+{
+        u8 buf[2];
+
+        buf[0] = reg;
+        buf[1] = val;
+        v4l_dbg(1, debug, client, "writing reg addr: %02X val: %02X\n", reg, val);
+        if (i2c_master_send(client, buf, 2) != 2)
+                v4l_err(client, "I/O error write 0x%02x/0x%02x\n", reg, val);
+}
+
+/* ------------------------------------------------------------------------ */
+
+/* The input changed due to new input or channel changed */
+static void upd64031a_change(struct i2c_client *client)
+{
+        struct upd64031a_state *state = i2c_get_clientdata(client);
+        u8 reg = state->regs[R00];
+
+        v4l_dbg(1, debug, client, "changed input or channel\n");
+        upd64031a_write(client, R00, reg | 0x10);
+        upd64031a_write(client, R00, reg & ~0x10);
+}
+
+/* ------------------------------------------------------------------------ */
+
+static int upd64031a_command(struct i2c_client *client, unsigned int cmd, void *arg)
+{
+        struct upd64031a_state *state = i2c_get_clientdata(client);
+        struct v4l2_routing *route = arg;
+
+        switch (cmd) {
+        case VIDIOC_S_FREQUENCY:
+                upd64031a_change(client);
+                break;
+
+        case VIDIOC_INT_G_VIDEO_ROUTING:
+                route->input = (state->gr_mode >> 6) |
+                        (state->direct_3dycs_connect >> 4) |
+                        (state->ext_comp_sync >> 1) |
+                        (state->ext_vert_sync >> 2);
+                route->output = 0;
+                break;
+
+        case VIDIOC_INT_S_VIDEO_ROUTING:
+        {
+                u8 r00, r05, r08;
+
+                state->gr_mode = (route->input & 3) << 6;
+                state->direct_3dycs_connect = (route->input & 0xc) << 4;
+                state->ext_comp_sync = (route->input & UPD64031A_COMPOSITE_EXTERNAL) << 1;
+                state->ext_vert_sync = (route->input & UPD64031A_VERTICAL_EXTERNAL) << 2;
+                r00 = (state->regs[R00] & ~GR_MODE_MASK) | state->gr_mode;
+                r05 = (state->regs[R00] & ~SYNC_CIRCUIT_MASK) |
+                        state->ext_comp_sync | state->ext_vert_sync;
+                r08 = (state->regs[R08] & ~DIRECT_3DYCS_CONNECT_MASK) |
+                        state->direct_3dycs_connect;
+                upd64031a_write(client, R00, r00);
+                upd64031a_write(client, R05, r05);
+                upd64031a_write(client, R08, r08);
+                upd64031a_change(client);
+                break;
+        }
+
+        case VIDIOC_LOG_STATUS:
+                v4l_info(client, "Status: SA00=0x%02x SA01=0x%02x\n",
+                        upd64031a_read(client, 0), upd64031a_read(client, 1));
+                break;
+
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+        case VIDIOC_INT_G_REGISTER:
+        {
+                struct v4l2_register *reg = arg;
+
+                if (reg->i2c_id != I2C_DRIVERID_UPD64031A)
+                        return -EINVAL;
+                reg->val = upd64031a_read(client, reg->reg & 0xff);
+                break;
+        }
+
+        case VIDIOC_INT_S_REGISTER:
+        {
+                struct v4l2_register *reg = arg;
+                u8 addr = reg->reg & 0xff;
+                u8 val = reg->val & 0xff;
+
+                if (reg->i2c_id != I2C_DRIVERID_UPD64031A)
+                        return -EINVAL;
+                if (!capable(CAP_SYS_ADMIN))
+                        return -EPERM;
+                upd64031a_write(client, addr, val);
+                break;
+        }
+#endif
+
+        default:
+                break;
+        }
+        return 0;
+}
+
+/* ------------------------------------------------------------------------ */
+
+/* i2c implementation */
+
+static struct i2c_driver i2c_driver;
+
+static int upd64031a_attach(struct i2c_adapter *adapter, int address, int kind)
+{
+        struct i2c_client *client;
+        struct upd64031a_state *state;
+        int i;
+
+        if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
+                return 0;
+
+        client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
+        if (client == NULL) {
+                return -ENOMEM;
+        }
+
+        client->addr = address;
+        client->adapter = adapter;
+        client->driver = &i2c_driver;
+        snprintf(client->name, sizeof(client->name) - 1, "uPD64031A");
+
+        v4l_info(client, "chip found @ 0x%x (%s)\n", address << 1, adapter->name);
+
+        state = kmalloc(sizeof(struct upd64031a_state), GFP_KERNEL);
+        if (state == NULL) {
+                kfree(client);
+                return -ENOMEM;
+        }
+        i2c_set_clientdata(client, state);
+        memcpy(state->regs, upd64031a_init, sizeof(state->regs));
+        state->gr_mode = UPD64031A_GR_ON << 6;
+        state->direct_3dycs_connect = UPD64031A_3DYCS_COMPOSITE << 4;
+        state->ext_comp_sync = state->ext_vert_sync = 0;
+        for (i = 0; i < TOT_REGS; i++) {
+                upd64031a_write(client, i, state->regs[i]);
+        }
+
+        i2c_attach_client(client);
+
+        return 0;
+}
+
+static int upd64031a_probe(struct i2c_adapter *adapter)
+{
+        if (adapter->class & I2C_CLASS_TV_ANALOG)
+                return i2c_probe(adapter, &addr_data, upd64031a_attach);
+        return 0;
+}
+
+static int upd64031a_detach(struct i2c_client *client)
+{
+        int err;
+
+        err = i2c_detach_client(client);
+        if (err)
+                return err;
+
+        kfree(client);
+        return 0;
+}
+
+/* ----------------------------------------------------------------------- */
+
+/* i2c implementation */
+static struct i2c_driver i2c_driver = {
+        .driver = {
+                .name = "upd64031a",
+        },
+        .id = I2C_DRIVERID_UPD64031A,
+        .attach_adapter = upd64031a_probe,
+        .detach_client  = upd64031a_detach,
+        .command = upd64031a_command,
+};
+
+
+static int __init upd64031a_init_module(void)
+{
+        return i2c_add_driver(&i2c_driver);
+}
+
+static void __exit upd64031a_exit_module(void)
+{
+        i2c_del_driver(&i2c_driver);
+}
+
+module_init(upd64031a_init_module);
+module_exit(upd64031a_exit_module);
+