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, 262 insertions, 0 deletions

diff --git a/drivers/media/video/upd64083.c b/drivers/media/video/upd64083.c
new file mode 100644
index 0000000..c3a7ffe
--- /dev/null
+++ b/drivers/media/video/upd64083.c
@@ -0,0 +1,262 @@
+/*
+ * upd6408x - NEC Electronics 3-Dimensional Y/C separation driver
+ *
+ * 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, 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/upd64083.h>
+
+MODULE_DESCRIPTION("uPD64083 driver");
+MODULE_AUTHOR("T. Adachi, Takeru KOMORIYA, Hans Verkuil");
+MODULE_LICENSE("GPL");
+
+static int debug = 0;
+module_param(debug, bool, 0644);
+
+MODULE_PARM_DESC(debug, "Debug level (0-1)");
+
+static unsigned short normal_i2c[] = { 0xb8 >> 1, 0xba >> 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,
+	R10, R11, R12, R13, R14,
+	R15, R16,
+	TOT_REGS
+};
+
+struct upd64083_state {
+	u8 mode;
+	u8 ext_y_adc;
+	u8 regs[TOT_REGS];
+};
+
+/* Initial values when used in combination with the
+   NEC upd64031a ghost reduction chip. */
+static u8 upd64083_init[] = {
+	0x1f, 0x01, 0xa0, 0x2d, 0x29,  /* we use EXCSS=0 */
+	0x36, 0xdd, 0x05, 0x56, 0x48,
+	0x00, 0x3a, 0xa0, 0x05, 0x08,
+	0x44, 0x60, 0x08, 0x52, 0xf8,
+	0x53, 0x60, 0x10
+};
+
+/* ------------------------------------------------------------------------ */
+
+static void upd64083_log_status(struct i2c_client *client)
+{
+	u8 buf[7];
+
+	i2c_master_recv(client, buf, 7);
+	v4l_info(client, "Status: SA00=%02x SA01=%02x SA02=%02x SA03=%02x "
+		      "SA04=%02x SA05=%02x SA06=%02x\n",
+		buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);
+}
+
+/* ------------------------------------------------------------------------ */
+
+static void upd64083_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);
+}
+
+/* ------------------------------------------------------------------------ */
+
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+static u8 upd64083_read(struct i2c_client *client, u8 reg)
+{
+	u8 buf[7];
+
+	if (reg >= sizeof(buf))
+		return 0xff;
+	i2c_master_recv(client, buf, sizeof(buf));
+	return buf[reg];
+}
+#endif
+
+/* ------------------------------------------------------------------------ */
+
+static int upd64083_command(struct i2c_client *client, unsigned int cmd, void *arg)
+{
+	struct upd64083_state *state = i2c_get_clientdata(client);
+	struct v4l2_routing *route = arg;
+
+	switch (cmd) {
+	case VIDIOC_INT_G_VIDEO_ROUTING:
+		route->input = (state->mode >> 6) | (state->ext_y_adc >> 3);
+		route->output = 0;
+		break;
+
+	case VIDIOC_INT_S_VIDEO_ROUTING:
+	{
+		u8 r00, r02;
+
+		if (route->input > 7 || (route->input & 6) == 6)
+			return -EINVAL;
+		state->mode = (route->input & 3) << 6;
+		state->ext_y_adc = (route->input & UPD64083_EXT_Y_ADC) << 3;
+		r00 = (state->regs[R00] & ~(3 << 6)) | state->mode;
+		r02 = (state->regs[R02] & ~(1 << 5)) | state->ext_y_adc;
+		upd64083_write(client, R00, r00);
+		upd64083_write(client, R02, r02);
+		break;
+	}
+
+	case VIDIOC_LOG_STATUS:
+		upd64083_log_status(client);
+		break;
+
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+	case VIDIOC_INT_G_REGISTER:
+	{
+		struct v4l2_register *reg = arg;
+
+		if (reg->i2c_id != I2C_DRIVERID_UPD64083)
+			return -EINVAL;
+		reg->val = upd64083_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_UPD64083)
+			return -EINVAL;
+		if (!capable(CAP_SYS_ADMIN))
+			return -EPERM;
+		upd64083_write(client, addr, val);
+		break;
+	}
+#endif
+	default:
+		break;
+	}
+
+	return 0;
+}
+
+/* ------------------------------------------------------------------------ */
+
+/* i2c implementation */
+
+static struct i2c_driver i2c_driver;
+
+static int upd64083_attach(struct i2c_adapter *adapter, int address, int kind)
+{
+	struct i2c_client *client;
+	struct upd64083_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, "uPD64083");
+
+	v4l_info(client, "chip found @ 0x%x (%s)\n", address << 1, adapter->name);
+
+	state = kmalloc(sizeof(struct upd64083_state), GFP_KERNEL);
+	if (state == NULL) {
+		kfree(client);
+		return -ENOMEM;
+	}
+	i2c_set_clientdata(client, state);
+	/* Initially assume that a ghost reduction chip is present */
+	state->mode = 0;  /* YCS mode */
+	state->ext_y_adc = (1 << 5);
+	memcpy(state->regs, upd64083_init, TOT_REGS);
+	for (i = 0; i < TOT_REGS; i++) {
+		upd64083_write(client, i, state->regs[i]);
+	}
+	i2c_attach_client(client);
+
+	return 0;
+}
+
+static int upd64083_probe(struct i2c_adapter *adapter)
+{
+	if (adapter->class & I2C_CLASS_TV_ANALOG)
+		return i2c_probe(adapter, &addr_data, upd64083_attach);
+	return 0;
+}
+
+static int upd64083_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 = "upd64083",
+	},
+	.id = I2C_DRIVERID_UPD64083,
+	.attach_adapter = upd64083_probe,
+	.detach_client  = upd64083_detach,
+	.command = upd64083_command,
+};
+
+
+static int __init upd64083_init_module(void)
+{
+	return i2c_add_driver(&i2c_driver);
+}
+
+static void __exit upd64083_exit_module(void)
+{
+	i2c_del_driver(&i2c_driver);
+}
+
+module_init(upd64083_init_module);
+module_exit(upd64083_exit_module);