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Diffstat (limited to 'drivers/staging/go7007/wis-uda1342.c')
-rw-r--r--drivers/staging/go7007/wis-uda1342.c136
1 files changed, 136 insertions, 0 deletions
diff --git a/drivers/staging/go7007/wis-uda1342.c b/drivers/staging/go7007/wis-uda1342.c
new file mode 100644
index 00000000000..a0894e3cb8c
--- /dev/null
+++ b/drivers/staging/go7007/wis-uda1342.c
@@ -0,0 +1,136 @@
+/*
+ * Copyright (C) 2005-2006 Micronas USA Inc.
+ *
+ * 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., 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/version.h>
+#include <linux/i2c.h>
+#include <linux/videodev2.h>
+#include <media/tvaudio.h>
+#include <media/v4l2-common.h>
+
+#include "wis-i2c.h"
+
+static int write_reg(struct i2c_client *client, int reg, int value)
+{
+ /* UDA1342 wants MSB first, but SMBus sends LSB first */
+ i2c_smbus_write_word_data(client, reg, swab16(value));
+ return 0;
+}
+
+static int wis_uda1342_command(struct i2c_client *client,
+ unsigned int cmd, void *arg)
+{
+ switch (cmd) {
+ case VIDIOC_S_AUDIO:
+ {
+ int *inp = arg;
+
+ switch (*inp) {
+ case TVAUDIO_INPUT_TUNER:
+ write_reg(client, 0x00, 0x1441); /* select input 2 */
+ break;
+ case TVAUDIO_INPUT_EXTERN:
+ write_reg(client, 0x00, 0x1241); /* select input 1 */
+ break;
+ default:
+ printk(KERN_ERR "wis-uda1342: input %d not supported\n",
+ *inp);
+ break;
+ }
+ break;
+ }
+ default:
+ break;
+ }
+ return 0;
+}
+
+static struct i2c_driver wis_uda1342_driver;
+
+static struct i2c_client wis_uda1342_client_templ = {
+ .name = "UDA1342 (WIS)",
+ .driver = &wis_uda1342_driver,
+};
+
+static int wis_uda1342_detect(struct i2c_adapter *adapter, int addr, int kind)
+{
+ struct i2c_client *client;
+
+ if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA))
+ return 0;
+
+ client = kmalloc(sizeof(struct i2c_client), GFP_KERNEL);
+ if (client == NULL)
+ return -ENOMEM;
+ memcpy(client, &wis_uda1342_client_templ,
+ sizeof(wis_uda1342_client_templ));
+ client->adapter = adapter;
+ client->addr = addr;
+
+ printk(KERN_DEBUG
+ "wis-uda1342: initializing UDA1342 at address %d on %s\n",
+ addr, adapter->name);
+
+ write_reg(client, 0x00, 0x8000); /* reset registers */
+ write_reg(client, 0x00, 0x1241); /* select input 1 */
+
+ i2c_attach_client(client);
+ return 0;
+}
+
+static int wis_uda1342_detach(struct i2c_client *client)
+{
+ int r;
+
+ r = i2c_detach_client(client);
+ if (r < 0)
+ return r;
+
+ kfree(client);
+ return 0;
+}
+
+static struct i2c_driver wis_uda1342_driver = {
+ .driver = {
+ .name = "WIS UDA1342 I2C driver",
+ },
+ .id = I2C_DRIVERID_WIS_UDA1342,
+ .detach_client = wis_uda1342_detach,
+ .command = wis_uda1342_command,
+};
+
+static int __init wis_uda1342_init(void)
+{
+ int r;
+
+ r = i2c_add_driver(&wis_uda1342_driver);
+ if (r < 0)
+ return r;
+ return wis_i2c_add_driver(wis_uda1342_driver.id, wis_uda1342_detect);
+}
+
+static void __exit wis_uda1342_cleanup(void)
+{
+ wis_i2c_del_driver(wis_uda1342_detect);
+ i2c_del_driver(&wis_uda1342_driver);
+}
+
+module_init(wis_uda1342_init);
+module_exit(wis_uda1342_cleanup);
+
+MODULE_LICENSE("GPL v2");