--- /dev/null
+
+/*
+
+ 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>
+
+ (c) 2005 Mauro Carvalho Chehab <mchehab@infradead.org>
+ - Multituner support and i2c address binding
+
+ 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/module.h>
+#include <linux/init.h>
+
+#include <asm/io.h>
+
+#include "cx88.h"
+#include <media/v4l2-common.h>
+
+static unsigned int i2c_debug;
+module_param(i2c_debug, int, 0644);
+MODULE_PARM_DESC(i2c_debug,"enable debug messages [i2c]");
+
+static unsigned int i2c_scan;
+module_param(i2c_scan, int, 0444);
+MODULE_PARM_DESC(i2c_scan,"scan i2c bus at insmod time");
+
+static unsigned int i2c_udelay = 5;
+module_param(i2c_udelay, int, 0644);
+MODULE_PARM_DESC(i2c_udelay,"i2c delay at insmod time, in usecs "
+ "(should be 5 or higher). Lower value means higher bus speed.");
+
+#define dprintk(level,fmt, arg...) if (i2c_debug >= level) \
+ printk(KERN_DEBUG "%s: " fmt, core->name , ## arg)
+
+/* ----------------------------------------------------------------------- */
+
+static void cx8800_bit_setscl(void *data, int state)
+{
+ struct cx88_core *core = data;
+
+ if (state)
+ core->i2c_state |= 0x02;
+ else
+ core->i2c_state &= ~0x02;
+ cx_write(MO_I2C, core->i2c_state);
+ cx_read(MO_I2C);
+}
+
+static void cx8800_bit_setsda(void *data, int state)
+{
+ struct cx88_core *core = data;
+
+ if (state)
+ core->i2c_state |= 0x01;
+ else
+ core->i2c_state &= ~0x01;
+ cx_write(MO_I2C, core->i2c_state);
+ cx_read(MO_I2C);
+}
+
+static int cx8800_bit_getscl(void *data)
+{
+ struct cx88_core *core = data;
+ u32 state;
+
+ state = cx_read(MO_I2C);
+ return state & 0x02 ? 1 : 0;
+}
+
+static int cx8800_bit_getsda(void *data)
+{
+ struct cx88_core *core = data;
+ u32 state;
+
+ state = cx_read(MO_I2C);
+ return state & 0x01;
+}
+
+/* ----------------------------------------------------------------------- */
+
+static const 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,
+ .timeout = 200,
+};
+
+/* ----------------------------------------------------------------------- */
+
+static const char * const i2c_devs[128] = {
+ [ 0x1c >> 1 ] = "lgdt330x",
+ [ 0x86 >> 1 ] = "tda9887/cx22702",
+ [ 0xa0 >> 1 ] = "eeprom",
+ [ 0xc0 >> 1 ] = "tuner (analog)",
+ [ 0xc2 >> 1 ] = "tuner (analog/dvb)",
+ [ 0xc8 >> 1 ] = "xc5000",
+};
+
+static void do_i2c_scan(const char *name, struct i2c_client *c)
+{
+ unsigned char buf;
+ int i,rc;
+
+ for (i = 0; i < ARRAY_SIZE(i2c_devs); i++) {
+ c->addr = i;
+ rc = i2c_master_recv(c,&buf,0);
+ if (rc < 0)
+ continue;
+ printk("%s: i2c scan: found device @ 0x%x [%s]\n",
+ name, i << 1, i2c_devs[i] ? i2c_devs[i] : "???");
+ }
+}
+
+/* init + register i2c adapter */
+int cx88_i2c_init(struct cx88_core *core, struct pci_dev *pci)
+{
+ /* Prevents usage of invalid delay values */
+ if (i2c_udelay<5)
+ i2c_udelay=5;
+
+ core->i2c_algo = cx8800_i2c_algo_template;
+
+
+ core->i2c_adap.dev.parent = &pci->dev;
+ strlcpy(core->i2c_adap.name,core->name,sizeof(core->i2c_adap.name));
+ core->i2c_adap.owner = THIS_MODULE;
+ core->i2c_algo.udelay = i2c_udelay;
+ core->i2c_algo.data = core;
+ i2c_set_adapdata(&core->i2c_adap, &core->v4l2_dev);
+ core->i2c_adap.algo_data = &core->i2c_algo;
+ core->i2c_client.adapter = &core->i2c_adap;
+ strlcpy(core->i2c_client.name, "cx88xx internal", I2C_NAME_SIZE);
+
+ cx8800_bit_setscl(core,1);
+ cx8800_bit_setsda(core,1);
+
+ core->i2c_rc = i2c_bit_add_bus(&core->i2c_adap);
+ if (0 == core->i2c_rc) {
+ static u8 tuner_data[] =
+ { 0x0b, 0xdc, 0x86, 0x52 };
+ static struct i2c_msg tuner_msg =
+ { .flags = 0, .addr = 0xc2 >> 1, .buf = tuner_data, .len = 4 };
+
+ dprintk(1, "i2c register ok\n");
+ switch( core->boardnr ) {
+ case CX88_BOARD_HAUPPAUGE_HVR1300:
+ case CX88_BOARD_HAUPPAUGE_HVR3000:
+ case CX88_BOARD_HAUPPAUGE_HVR4000:
+ printk("%s: i2c init: enabling analog demod on HVR1300/3000/4000 tuner\n",
+ core->name);
+ i2c_transfer(core->i2c_client.adapter, &tuner_msg, 1);
+ break;
+ default:
+ break;
+ }
+ if (i2c_scan)
+ do_i2c_scan(core->name,&core->i2c_client);
+ } else
+ printk("%s: i2c register FAILED\n", core->name);
+
+ return core->i2c_rc;
+}
Code Review / kvmfornfv.git / blobdiff