/*
* cx18 I2C functions
*
* Derived from ivtv-i2c.c
*
* Copyright (C) 2007 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., 59 Temple Place, Suite 330, Boston, MA
* 02111-1307 USA
*/
#include "cx18-driver.h"
#include "cx18-cards.h"
#include "cx18-gpio.h"
#include "cx18-av-core.h"
#include "cx18-i2c.h"
#include <media/ir-kbd-i2c.h>
#define CX18_REG_I2C_1_WR 0xf15000
#define CX18_REG_I2C_1_RD 0xf15008
#define CX18_REG_I2C_2_WR 0xf25100
#define CX18_REG_I2C_2_RD 0xf25108
#define SETSCL_BIT 0x0001
#define SETSDL_BIT 0x0002
#define GETSCL_BIT 0x0004
#define GETSDL_BIT 0x0008
#ifndef I2C_ADAP_CLASS_TV_ANALOG
#define I2C_ADAP_CLASS_TV_ANALOG I2C_CLASS_TV_ANALOG
#endif
#define CX18_CS5345_I2C_ADDR 0x4c
/* This array should match the CX18_HW_ defines */
static const u8 hw_driverids[] = {
I2C_DRIVERID_TUNER,
I2C_DRIVERID_TVEEPROM,
I2C_DRIVERID_CS5345,
0, /* CX18_HW_GPIO dummy driver ID */
0 /* CX18_HW_CX23418 dummy driver ID */
};
/* This array should match the CX18_HW_ defines */
static const u8 hw_addrs[] = {
0,
0,
CX18_CS5345_I2C_ADDR,
0, /* CX18_HW_GPIO dummy driver ID */
0, /* CX18_HW_CX23418 dummy driver ID */
};
/* This array should match the CX18_HW_ defines */
/* This might well become a card-specific array */
static const u8 hw_bus[] = {
0,
0,
0,
0, /* CX18_HW_GPIO dummy driver ID */
0, /* CX18_HW_CX23418 dummy driver ID */
};
/* This array should match the CX18_HW_ defines */
static const char * const hw_devicenames[] = {
"tuner",
"tveeprom",
"cs5345",
"gpio",
"cx23418",
};
int cx18_i2c_register(struct cx18 *cx, unsigned idx)
{
struct i2c_board_info info;
struct i2c_client *c;
u8 id, bus;
int i;
CX18_DEBUG_I2C("i2c client register\n");
if (idx >= ARRAY_SIZE(hw_driverids) || hw_driverids[idx] == 0)
return -1;
id = hw_driverids[idx];
bus = hw_bus[idx];
memset(&info, 0, sizeof(info));
strlcpy(info.type, hw_devicenames[idx], sizeof(info.type));
info.addr = hw_addrs[idx];
for (i = 0; i < I2C_CLIENTS_MAX; i++)
if (cx->i2c_clients[i] == NULL)
break;
if (i == I2C_CLIENTS_MAX) {
CX18_ERR("insufficient room for new I2C client!\n");
return -ENOMEM;
}
if (id != I2C_DRIVERID_TUNER) {
c = i2c_new_device(&cx->i2c_adap[bus], &info);
if (c->driver == NULL)
i2c_unregister_device(c);
else
cx->i2c_clients[i] = c;
return cx->i2c_clients[i] ? 0 : -ENODEV;
}
/* special tuner handling */
c = i2c_new_probed_device(&cx->i2c_adap[1], &info, cx->card_i2c->radio);
if (c && c->driver == NULL)
i2c_unregister_device(c);
else if (c)
cx->i2c_clients[i++] = c;
c = i2c_new_probed_device(&cx->i2c_adap[1], &info, cx->card_i2c->demod);
if (c && c->driver == NULL)
i2c_unregister_device(c);
else if (c)
cx->i2c_clients[i++] = c;
c = i2c_new_probed_device(&cx->i2c_adap[1], &info, cx->card_i2c->tv);
if (c && c->driver == NULL)
i2c_unregister_device(c);
else if (c)
cx->i2c_clients[i++] = c;
return 0;
}
static int attach_inform(struct i2c_client *client)
{
return 0;
}
static int detach_inform(struct i2c_client *client)
{
int i;
struct cx18 *cx = (struct cx18 *)i2c_get_adapdata(client->adapter);
CX18_DEBUG_I2C("i2c client detach\n");
for (i = 0; i < I2C_CLIENTS_MAX; i++) {
if (cx->i2c_clients[i] == client) {
cx->i2c_clients[i] = NULL;
break;
}
}
CX18_DEBUG_I2C("i2c detach [client=%s,%s]\n",
client->name, (i < I2C_CLIENTS_MAX) ? "ok" : "failed");
return 0;
}
static void cx18_setscl(void *data, int state)
{
struct cx18 *cx = ((struct cx18_i2c_algo_callback_data *)data)->cx;
int bus_index = ((struct cx18_i2c_algo_callback_data *)data)->bus_index;
u32 addr = bus_index ? CX18_REG_I2C_2_WR : CX18_REG_I2C_1_WR;
u32 r = read_reg(addr);
if (state)
write_reg_sync(r | SETSCL_BIT, addr);
else
write_reg_sync(r & ~SETSCL_BIT, addr);
}
static void cx18_setsda(void *data, int state)
{
struct cx18 *cx = ((struct cx18_i2c_algo_callback_data *)data)->cx;
int bus_index = ((struct cx18_i2c_algo_callback_data *)data)->bus_index;
u32 addr = bus_index ? CX18_REG_I2C_2_WR : CX18_REG_I2C_1_WR;
u32 r = read_reg(addr);
if (state)
write_reg_sync(r | SETSDL_BIT, addr);
else
write_reg_sync(r & ~SETSDL_BIT, addr);
}
static int cx18_getscl(void *data)
{
struct cx18 *cx = ((struct cx18_i2c_algo_callback_data *)data)->cx;
int bus_index = ((struct cx18_i2c_algo_callback_data *)data)->bus_index;
u32 addr = bus_index ? CX18_REG_I2C_2_RD : CX18_REG_I2C_1_RD;
return read_reg(addr) & GETSCL_BIT;
}
static int cx18_getsda(void *data)
{
struct cx18 *cx = ((struct cx18_i2c_algo_callback_data *)data)->cx;
int bus_index = ((struct cx18_i2c_algo_callback_data *)data)->bus_index;
u32 addr = bus_index ? CX18_REG_I2C_2_RD : CX18_REG_I2C_1_RD;
return read_reg(addr) & GETSDL_BIT;
}
/* template for i2c-bit-algo */
static struct i2c_adapter cx18_i2c_adap_template = {
.name = "cx18 i2c driver",
.id = I2C_HW_B_CX2341X,
.algo = NULL, /* set by i2c-algo-bit */
.algo_data = NULL, /* filled from template */
.client_register = attach_inform,
.client_unregister = detach_inform,
.owner = THIS_MODULE,
};
#define CX18_SCL_PERIOD (10) /* usecs. 10 usec is period for a 100 KHz clock */
#define CX18_ALGO_BIT_TIMEOUT (2) /* seconds */
static struct i2c_algo_bit_data cx18_i2c_algo_template = {
.setsda = cx18_setsda,
.setscl = cx18_setscl,
.getsda = cx18_getsda,
.getscl = cx18_getscl,
.udelay = CX18_SCL_PERIOD/2, /* 1/2 clock period in usec*/
.timeout = CX18_ALGO_BIT_TIMEOUT*HZ /* jiffies */
};
static struct i2c_client cx18_i2c_client_template = {
.name = "cx18 internal",
};
int cx18_call_i2c_client(struct cx18 *cx, int addr, unsigned cmd, void *arg)
{
struct i2c_client *client;
int retval;
int i;
CX18_DEBUG_I2C("call_i2c_client addr=%02x\n", addr);
for (i = 0; i < I2C_CLIENTS_MAX; i++) {
client = cx->i2c_clients[i];
if (client == NULL || client->driver == NULL ||
client->driver->command == NULL)
continue;
if (addr == client->addr) {
retval = client->driver->command(client, cmd, arg);
return retval;
}
}
if (cmd != VIDIOC_G_CHIP_IDENT)
CX18_ERR("i2c addr 0x%02x not found for cmd 0x%x!\n",
addr, cmd);
return -ENODEV;
}
/* Find the i2c device based on the driver ID and return
its i2c address or -ENODEV if no matching device was found. */
static int cx18_i2c_id_addr(struct cx18 *cx, u32 id)
{
struct i2c_client *client;
int retval = -ENODEV;
int i;
for (i = 0; i < I2C_CLIENTS_MAX; i++) {
client = cx->i2c_clients[i];
if (client == NULL || client->driver == NULL)
continue;
if (id == client->driver->id) {
retval = client->addr;
break;
}
}
return retval;
}
/* Find the i2c device name matching the DRIVERID */
static const char *cx18_i2c_id_name(u32 id)
{
int i;
for (i = 0; i < ARRAY_SIZE(hw_driverids); i++)
if (hw_driverids[i] == id)
return hw_devicenames[i];
return "unknown device";
}
/* Find the i2c device name matching the CX18_HW_ flag */
static const char *cx18_i2c_hw_name(u32 hw)
{
int i;
for (i = 0; i < ARRAY_SIZE(hw_driverids); i++)
if (1 << i == hw)
return hw_devicenames[i];
return "unknown device";
}
/* Find the i2c device matching the CX18_HW_ flag and return
its i2c address or -ENODEV if no matching device was found. */
int cx18_i2c_hw_addr(struct cx18 *cx, u32 hw)
{
int i;
for (i = 0; i < ARRAY_SIZE(hw_driverids); i++)
if (1 << i == hw)
return cx18_i2c_id_addr(cx, hw_driverids[i]);
return -ENODEV;
}
/* Calls i2c device based on CX18_HW_ flag. If hw == 0, then do nothing.
If hw == CX18_HW_GPIO then call the gpio handler. */
int cx18_i2c_hw(struct cx18 *cx, u32 hw, unsigned int cmd, void *arg)
{
int addr;
if (hw == CX18_HW_GPIO || hw == 0)
return 0;
if (hw == CX18_HW_CX23418)
return cx18_av_cmd(cx, cmd, arg);
addr = cx18_i2c_hw_addr(cx, hw);
if (addr < 0) {
CX18_ERR("i2c hardware 0x%08x (%s) not found for cmd 0x%x!\n",
hw, cx18_i2c_hw_name(hw), cmd);
return addr;
}
return cx18_call_i2c_client(cx, addr, cmd, arg);
}
/* Calls i2c device based on I2C driver ID. */
int cx18_i2c_id(struct cx18 *cx, u32 id, unsigned int cmd, void *arg)
{
int addr;
addr = cx18_i2c_id_addr(cx, id);
if (addr < 0) {
if (cmd != VIDIOC_G_CHIP_IDENT)
CX18_ERR("i2c ID 0x%08x (%s) not found for cmd 0x%x!\n",
id, cx18_i2c_id_name(id), cmd);
return addr;
}
return cx18_call_i2c_client(cx, addr, cmd, arg);
}
/* broadcast cmd for all I2C clients and for the gpio subsystem */
void cx18_call_i2c_clients(struct cx18 *cx, unsigned int cmd, void *arg)
{
if (cx->i2c_adap[0].algo == NULL || cx->i2c_adap[1].algo == NULL) {
CX18_ERR("adapter is not set\n");
return;
}
cx18_av_cmd(cx, cmd, arg);
i2c_clients_command(&cx->i2c_adap[0], cmd, arg);
i2c_clients_command(&cx->i2c_adap[1], cmd, arg);
}
/* init + register i2c algo-bit adapter */
int init_cx18_i2c(struct cx18 *cx)
{
int i;
CX18_DEBUG_I2C("i2c init\n");
for (i = 0; i < 2; i++) {
memcpy(&cx->i2c_adap[i], &cx18_i2c_adap_template,
sizeof(struct i2c_adapter));
memcpy(&cx->i2c_algo[i], &cx18_i2c_algo_template,
sizeof(struct i2c_algo_bit_data));
cx->i2c_algo_cb_data[i].cx = cx;
cx->i2c_algo_cb_data[i].bus_index = i;
cx->i2c_algo[i].data = &cx->i2c_algo_cb_data[i];
cx->i2c_adap[i].algo_data = &cx->i2c_algo[i];
sprintf(cx->i2c_adap[i].name + strlen(cx->i2c_adap[i].name),
" #%d-%d", cx->num, i);
i2c_set_adapdata(&cx->i2c_adap[i], cx);
memcpy(&cx->i2c_client[i], &cx18_i2c_client_template,
sizeof(struct i2c_client));
sprintf(cx->i2c_client[i].name +
strlen(cx->i2c_client[i].name), "%d", i);
cx->i2c_client[i].adapter = &cx->i2c_adap[i];
cx->i2c_adap[i].dev.parent = &cx->dev->dev;
}
if (read_reg(CX18_REG_I2C_2_WR) != 0x0003c02f) {
/* Reset/Unreset I2C hardware block */
write_reg(0x10000000, 0xc71004); /* Clock select 220MHz */
write_reg_sync(0x10001000, 0xc71024); /* Clock Enable */
}
/* courtesy of Steven Toth <stoth@hauppauge.com> */
write_reg_sync(0x00c00000, 0xc7001c);
mdelay(10);
write_reg_sync(0x00c000c0, 0xc7001c);
mdelay(10);
write_reg_sync(0x00c00000, 0xc7001c);
write_reg_sync(0x00c00000, 0xc730c8); /* Set to edge-triggered intrs. */
write_reg_sync(0x00c00000, 0xc730c4); /* Clear any stale intrs */
/* Hw I2C1 Clock Freq ~100kHz */
write_reg_sync(0x00021c0f & ~4, CX18_REG_I2C_1_WR);
cx18_setscl(&cx->i2c_algo_cb_data[0], 1);
cx18_setsda(&cx->i2c_algo_cb_data[0], 1);
/* Hw I2C2 Clock Freq ~100kHz */
write_reg_sync(0x00021c0f & ~4, CX18_REG_I2C_2_WR);
cx18_setscl(&cx->i2c_algo_cb_data[1], 1);
cx18_setsda(&cx->i2c_algo_cb_data[1], 1);
cx18_reset_i2c_slaves_gpio(cx);
return i2c_bit_add_bus(&cx->i2c_adap[0]) ||
i2c_bit_add_bus(&cx->i2c_adap[1]);
}
void exit_cx18_i2c(struct cx18 *cx)
{
int i;
CX18_DEBUG_I2C("i2c exit\n");
write_reg(read_reg(CX18_REG_I2C_1_WR) | 4, CX18_REG_I2C_1_WR);
write_reg(read_reg(CX18_REG_I2C_2_WR) | 4, CX18_REG_I2C_2_WR);
for (i = 0; i < 2; i++) {
i2c_del_adapter(&cx->i2c_adap[i]);
}
}
/*
Hauppauge HVR1600 should have:
32 cx24227
98 unknown
a0 eeprom
c2 tuner
e? zilog ir
*/
