Initial revision

1 files changed, 174 insertions, 0 deletions

diff --git a/linux/drivers/media/video/cx88/cx88-i2c.c b/linux/drivers/media/video/cx88/cx88-i2c.c
new file mode 100644
index 000000000..2de607e1f
--- /dev/null
+++ b/linux/drivers/media/video/cx88/cx88-i2c.c
@@ -0,0 +1,174 @@
+/*
+    cx88-i2c.c  --  all the i2c code is here
+
+    Copyright (C) 1996,97,98 Ralph  Metzler (rjkm@thp.uni-koeln.de)
+                           & Marcus Metzler (mocm@thp.uni-koeln.de)
+    (c) 2002 Yurij Sysoev <yurij@naturesoft.net>
+    (c) 1999-2003 Gerd Knorr <kraxel@bytesex.org>
+
+    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.
+    
+*/
+
+#define __NO_VERSION__ 1
+
+#include <linux/module.h>
+#include <linux/init.h>
+
+#include <asm/io.h>
+
+#include "cx88.h"
+
+/* ----------------------------------------------------------------------- */
+
+void cx8800_bit_setscl(void *data, int state)
+{
+	struct cx8800_dev *dev = data;
+
+	if (state)
+		dev->i2c_state |= 0x02;
+	else
+		dev->i2c_state &= ~0x02;
+	cx_write(MO_I2C, dev->i2c_state);
+	cx_read(MO_I2C);
+}
+
+void cx8800_bit_setsda(void *data, int state)
+{
+	struct cx8800_dev *dev = data;
+
+	if (state)
+		dev->i2c_state |= 0x01;
+	else
+		dev->i2c_state &= ~0x01;
+	cx_write(MO_I2C, dev->i2c_state);
+	cx_read(MO_I2C);
+}
+
+static int cx8800_bit_getscl(void *data)
+{
+	struct cx8800_dev *dev = data;
+	u32 state;
+	
+	state = cx_read(MO_I2C);
+	return state & 0x02 ? 1 : 0;
+}
+
+static int cx8800_bit_getsda(void *data)
+{
+	struct cx8800_dev *dev = data;
+	u32 state;
+
+	state = cx_read(MO_I2C);
+	return state & 0x01;
+}
+
+/* ----------------------------------------------------------------------- */
+
+#ifndef I2C_PEC
+static void cx8800_inc_use(struct i2c_adapter *adap)
+{
+	MOD_INC_USE_COUNT;
+}
+
+static void cx8800_dec_use(struct i2c_adapter *adap)
+{
+	MOD_DEC_USE_COUNT;
+}
+#endif
+
+static int attach_inform(struct i2c_client *client)
+{
+        struct cx8800_dev *dev = i2c_get_adapdata(client->adapter);
+
+	if (dev->tuner_type != UNSET)
+		cx8800_call_i2c_clients(dev,TUNER_SET_TYPE,&dev->tuner_type);
+
+        if (1 /* fixme: debug */)
+		printk("%s: i2c attach [client=%s]\n",
+		       dev->name, i2c_clientname(client));
+        return 0;
+}
+
+void cx8800_call_i2c_clients(struct cx8800_dev *dev, unsigned int cmd, void *arg)
+{
+	if (0 != dev->i2c_rc)
+		return;
+	i2c_clients_command(&dev->i2c_adap, cmd, arg);
+}
+
+static struct i2c_algo_bit_data cx8800_i2c_algo_template = {
+	.setsda  = cx8800_bit_setsda,
+	.setscl  = cx8800_bit_setscl,
+	.getsda  = cx8800_bit_getsda,
+	.getscl  = cx8800_bit_getscl,
+	.udelay  = 16,
+	.mdelay  = 10,
+	.timeout = 200,
+};
+
+/* ----------------------------------------------------------------------- */
+
+static struct i2c_adapter cx8800_i2c_adap_template = {
+#ifdef I2C_PEC
+	.owner             = THIS_MODULE,
+#else
+	.inc_use           = cx8800_inc_use,
+	.dec_use           = cx8800_dec_use,
+#endif
+#ifdef I2C_ADAP_CLASS_TV_ANALOG
+	.class             = I2C_ADAP_CLASS_TV_ANALOG,
+#endif
+	I2C_DEVNAME("cx2388x"),
+	.id                = I2C_HW_B_BT848,
+	.client_register   = attach_inform,
+};
+
+static struct i2c_client cx8800_i2c_client_template = {
+        I2C_DEVNAME("cx88xx internal"),
+        .id   = -1,
+};
+
+/* init + register i2c algo-bit adapter */
+int __devinit cx8800_i2c_init(struct cx8800_dev *dev)
+{
+	memcpy(&dev->i2c_adap, &cx8800_i2c_adap_template,
+	       sizeof(dev->i2c_adap));
+	memcpy(&dev->i2c_algo, &cx8800_i2c_algo_template,
+	       sizeof(dev->i2c_algo));
+	memcpy(&dev->i2c_client, &cx8800_i2c_client_template,
+	       sizeof(dev->i2c_client));
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,54)
+	dev->i2c_adap.dev.parent = &dev->pci->dev;
+#endif
+	strcpy(dev->i2c_adap.name,dev->name);
+        dev->i2c_algo.data = dev;
+        i2c_set_adapdata(&dev->i2c_adap,dev);
+        dev->i2c_adap.algo_data = &dev->i2c_algo;
+        dev->i2c_client.adapter = &dev->i2c_adap;
+
+	cx8800_bit_setscl(dev,1);
+	cx8800_bit_setsda(dev,1);
+
+	dev->i2c_rc = i2c_bit_add_bus(&dev->i2c_adap);
+	return dev->i2c_rc;
+}
+
+/*
+ * Local variables:
+ * c-basic-offset: 8
+ * End:
+ */