310 lines
8.5 KiB
C
310 lines
8.5 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* cx18 I2C functions
|
|
*
|
|
* Derived from ivtv-i2c.c
|
|
*
|
|
* Copyright (C) 2007 Hans Verkuil <hverkuil@xs4all.nl>
|
|
* Copyright (C) 2008 Andy Walls <awalls@md.metrocast.net>
|
|
*/
|
|
|
|
#include "cx18-driver.h"
|
|
#include "cx18-io.h"
|
|
#include "cx18-cards.h"
|
|
#include "cx18-gpio.h"
|
|
#include "cx18-i2c.h"
|
|
#include "cx18-irq.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
|
|
|
|
#define CX18_CS5345_I2C_ADDR 0x4c
|
|
#define CX18_Z8F0811_IR_TX_I2C_ADDR 0x70
|
|
#define CX18_Z8F0811_IR_RX_I2C_ADDR 0x71
|
|
|
|
/* This array should match the CX18_HW_ defines */
|
|
static const u8 hw_addrs[] = {
|
|
0, /* CX18_HW_TUNER */
|
|
0, /* CX18_HW_TVEEPROM */
|
|
CX18_CS5345_I2C_ADDR, /* CX18_HW_CS5345 */
|
|
0, /* CX18_HW_DVB */
|
|
0, /* CX18_HW_418_AV */
|
|
0, /* CX18_HW_GPIO_MUX */
|
|
0, /* CX18_HW_GPIO_RESET_CTRL */
|
|
CX18_Z8F0811_IR_RX_I2C_ADDR, /* CX18_HW_Z8F0811_IR_HAUP */
|
|
};
|
|
|
|
/* This array should match the CX18_HW_ defines */
|
|
/* This might well become a card-specific array */
|
|
static const u8 hw_bus[] = {
|
|
1, /* CX18_HW_TUNER */
|
|
0, /* CX18_HW_TVEEPROM */
|
|
0, /* CX18_HW_CS5345 */
|
|
0, /* CX18_HW_DVB */
|
|
0, /* CX18_HW_418_AV */
|
|
0, /* CX18_HW_GPIO_MUX */
|
|
0, /* CX18_HW_GPIO_RESET_CTRL */
|
|
0, /* CX18_HW_Z8F0811_IR_HAUP */
|
|
};
|
|
|
|
/* This array should match the CX18_HW_ defines */
|
|
static const char * const hw_devicenames[] = {
|
|
"tuner",
|
|
"tveeprom",
|
|
"cs5345",
|
|
"cx23418_DTV",
|
|
"cx23418_AV",
|
|
"gpio_mux",
|
|
"gpio_reset_ctrl",
|
|
"ir_z8f0811_haup",
|
|
};
|
|
|
|
static int cx18_i2c_new_ir(struct cx18 *cx, struct i2c_adapter *adap, u32 hw,
|
|
const char *type, u8 addr)
|
|
{
|
|
struct i2c_board_info info;
|
|
struct IR_i2c_init_data *init_data = &cx->ir_i2c_init_data;
|
|
unsigned short addr_list[2] = { addr, I2C_CLIENT_END };
|
|
|
|
memset(&info, 0, sizeof(struct i2c_board_info));
|
|
strscpy(info.type, type, I2C_NAME_SIZE);
|
|
|
|
/* Our default information for ir-kbd-i2c.c to use */
|
|
switch (hw) {
|
|
case CX18_HW_Z8F0811_IR_HAUP:
|
|
init_data->ir_codes = RC_MAP_HAUPPAUGE;
|
|
init_data->internal_get_key_func = IR_KBD_GET_KEY_HAUP_XVR;
|
|
init_data->type = RC_PROTO_BIT_RC5 | RC_PROTO_BIT_RC6_MCE |
|
|
RC_PROTO_BIT_RC6_6A_32;
|
|
init_data->name = cx->card_name;
|
|
info.platform_data = init_data;
|
|
break;
|
|
}
|
|
|
|
return IS_ERR(i2c_new_scanned_device(adap, &info, addr_list, NULL)) ?
|
|
-1 : 0;
|
|
}
|
|
|
|
int cx18_i2c_register(struct cx18 *cx, unsigned idx)
|
|
{
|
|
struct v4l2_subdev *sd;
|
|
int bus = hw_bus[idx];
|
|
struct i2c_adapter *adap = &cx->i2c_adap[bus];
|
|
const char *type = hw_devicenames[idx];
|
|
u32 hw = 1 << idx;
|
|
|
|
if (hw == CX18_HW_TUNER) {
|
|
/* special tuner group handling */
|
|
sd = v4l2_i2c_new_subdev(&cx->v4l2_dev,
|
|
adap, type, 0, cx->card_i2c->radio);
|
|
if (sd != NULL)
|
|
sd->grp_id = hw;
|
|
sd = v4l2_i2c_new_subdev(&cx->v4l2_dev,
|
|
adap, type, 0, cx->card_i2c->demod);
|
|
if (sd != NULL)
|
|
sd->grp_id = hw;
|
|
sd = v4l2_i2c_new_subdev(&cx->v4l2_dev,
|
|
adap, type, 0, cx->card_i2c->tv);
|
|
if (sd != NULL)
|
|
sd->grp_id = hw;
|
|
return sd != NULL ? 0 : -1;
|
|
}
|
|
|
|
if (hw == CX18_HW_Z8F0811_IR_HAUP)
|
|
return cx18_i2c_new_ir(cx, adap, hw, type, hw_addrs[idx]);
|
|
|
|
/* Is it not an I2C device or one we do not wish to register? */
|
|
if (!hw_addrs[idx])
|
|
return -1;
|
|
|
|
/* It's an I2C device other than an analog tuner or IR chip */
|
|
sd = v4l2_i2c_new_subdev(&cx->v4l2_dev, adap, type, hw_addrs[idx],
|
|
NULL);
|
|
if (sd != NULL)
|
|
sd->grp_id = hw;
|
|
return sd != NULL ? 0 : -1;
|
|
}
|
|
|
|
/* Find the first member of the subdev group id in hw */
|
|
struct v4l2_subdev *cx18_find_hw(struct cx18 *cx, u32 hw)
|
|
{
|
|
struct v4l2_subdev *result = NULL;
|
|
struct v4l2_subdev *sd;
|
|
|
|
spin_lock(&cx->v4l2_dev.lock);
|
|
v4l2_device_for_each_subdev(sd, &cx->v4l2_dev) {
|
|
if (sd->grp_id == hw) {
|
|
result = sd;
|
|
break;
|
|
}
|
|
}
|
|
spin_unlock(&cx->v4l2_dev.lock);
|
|
return result;
|
|
}
|
|
|
|
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 = cx18_read_reg(cx, addr);
|
|
|
|
if (state)
|
|
cx18_write_reg(cx, r | SETSCL_BIT, addr);
|
|
else
|
|
cx18_write_reg(cx, 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 = cx18_read_reg(cx, addr);
|
|
|
|
if (state)
|
|
cx18_write_reg(cx, r | SETSDL_BIT, addr);
|
|
else
|
|
cx18_write_reg(cx, 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 cx18_read_reg(cx, 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 cx18_read_reg(cx, addr) & GETSDL_BIT;
|
|
}
|
|
|
|
/* template for i2c-bit-algo */
|
|
static const struct i2c_adapter cx18_i2c_adap_template = {
|
|
.name = "cx18 i2c driver",
|
|
.algo = NULL, /* set by i2c-algo-bit */
|
|
.algo_data = NULL, /* filled from template */
|
|
.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 const 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 */
|
|
};
|
|
|
|
/* init + register i2c adapter */
|
|
int init_cx18_i2c(struct cx18 *cx)
|
|
{
|
|
int i, err;
|
|
CX18_DEBUG_I2C("i2c init\n");
|
|
|
|
for (i = 0; i < 2; i++) {
|
|
/* Setup algorithm for adapter */
|
|
cx->i2c_algo[i] = cx18_i2c_algo_template;
|
|
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];
|
|
|
|
/* Setup adapter */
|
|
cx->i2c_adap[i] = cx18_i2c_adap_template;
|
|
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->instance, i);
|
|
i2c_set_adapdata(&cx->i2c_adap[i], &cx->v4l2_dev);
|
|
cx->i2c_adap[i].dev.parent = &cx->pci_dev->dev;
|
|
}
|
|
|
|
if (cx18_read_reg(cx, CX18_REG_I2C_2_WR) != 0x0003c02f) {
|
|
/* Reset/Unreset I2C hardware block */
|
|
/* Clock select 220MHz */
|
|
cx18_write_reg_expect(cx, 0x10000000, 0xc71004,
|
|
0x00000000, 0x10001000);
|
|
/* Clock Enable */
|
|
cx18_write_reg_expect(cx, 0x10001000, 0xc71024,
|
|
0x00001000, 0x10001000);
|
|
}
|
|
/* courtesy of Steven Toth <stoth@hauppauge.com> */
|
|
cx18_write_reg_expect(cx, 0x00c00000, 0xc7001c, 0x00000000, 0x00c000c0);
|
|
mdelay(10);
|
|
cx18_write_reg_expect(cx, 0x00c000c0, 0xc7001c, 0x000000c0, 0x00c000c0);
|
|
mdelay(10);
|
|
cx18_write_reg_expect(cx, 0x00c00000, 0xc7001c, 0x00000000, 0x00c000c0);
|
|
mdelay(10);
|
|
|
|
/* Set to edge-triggered intrs. */
|
|
cx18_write_reg(cx, 0x00c00000, 0xc730c8);
|
|
/* Clear any stale intrs */
|
|
cx18_write_reg_expect(cx, HW2_I2C1_INT|HW2_I2C2_INT, HW2_INT_CLR_STATUS,
|
|
~(HW2_I2C1_INT|HW2_I2C2_INT), HW2_I2C1_INT|HW2_I2C2_INT);
|
|
|
|
/* Hw I2C1 Clock Freq ~100kHz */
|
|
cx18_write_reg(cx, 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 */
|
|
cx18_write_reg(cx, 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_call_hw(cx, CX18_HW_GPIO_RESET_CTRL,
|
|
core, reset, (u32) CX18_GPIO_RESET_I2C);
|
|
|
|
err = i2c_bit_add_bus(&cx->i2c_adap[0]);
|
|
if (err)
|
|
goto err;
|
|
err = i2c_bit_add_bus(&cx->i2c_adap[1]);
|
|
if (err)
|
|
goto err_del_bus_0;
|
|
return 0;
|
|
|
|
err_del_bus_0:
|
|
i2c_del_adapter(&cx->i2c_adap[0]);
|
|
err:
|
|
return err;
|
|
}
|
|
|
|
void exit_cx18_i2c(struct cx18 *cx)
|
|
{
|
|
int i;
|
|
CX18_DEBUG_I2C("i2c exit\n");
|
|
cx18_write_reg(cx, cx18_read_reg(cx, CX18_REG_I2C_1_WR) | 4,
|
|
CX18_REG_I2C_1_WR);
|
|
cx18_write_reg(cx, cx18_read_reg(cx, 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
|
|
*/
|