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ubuntu-linux-kernel/drivers/media/i2c/adv748x/adv748x-core.c

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2024-04-01 15:06:58 +00:00
/*
* Driver for Analog Devices ADV748X HDMI receiver with AFE
*
* Copyright (C) 2017 Renesas Electronics Corp.
*
* 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.
*
* Authors:
* Koji Matsuoka <koji.matsuoka.xm@renesas.com>
* Niklas Söderlund <niklas.soderlund@ragnatech.se>
* Kieran Bingham <kieran.bingham@ideasonboard.com>
*/
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/of_graph.h>
#include <linux/regmap.h>
#include <linux/slab.h>
#include <linux/v4l2-dv-timings.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-device.h>
#include <media/v4l2-dv-timings.h>
#include <media/v4l2-ioctl.h>
#include "adv748x.h"
/* -----------------------------------------------------------------------------
* Register manipulation
*/
static const struct regmap_config adv748x_regmap_cnf[] = {
{
.name = "io",
.reg_bits = 8,
.val_bits = 8,
.max_register = 0xff,
.cache_type = REGCACHE_NONE,
},
{
.name = "dpll",
.reg_bits = 8,
.val_bits = 8,
.max_register = 0xff,
.cache_type = REGCACHE_NONE,
},
{
.name = "cp",
.reg_bits = 8,
.val_bits = 8,
.max_register = 0xff,
.cache_type = REGCACHE_NONE,
},
{
.name = "hdmi",
.reg_bits = 8,
.val_bits = 8,
.max_register = 0xff,
.cache_type = REGCACHE_NONE,
},
{
.name = "edid",
.reg_bits = 8,
.val_bits = 8,
.max_register = 0xff,
.cache_type = REGCACHE_NONE,
},
{
.name = "repeater",
.reg_bits = 8,
.val_bits = 8,
.max_register = 0xff,
.cache_type = REGCACHE_NONE,
},
{
.name = "infoframe",
.reg_bits = 8,
.val_bits = 8,
.max_register = 0xff,
.cache_type = REGCACHE_NONE,
},
{
.name = "cec",
.reg_bits = 8,
.val_bits = 8,
.max_register = 0xff,
.cache_type = REGCACHE_NONE,
},
{
.name = "sdp",
.reg_bits = 8,
.val_bits = 8,
.max_register = 0xff,
.cache_type = REGCACHE_NONE,
},
{
.name = "txb",
.reg_bits = 8,
.val_bits = 8,
.max_register = 0xff,
.cache_type = REGCACHE_NONE,
},
{
.name = "txa",
.reg_bits = 8,
.val_bits = 8,
.max_register = 0xff,
.cache_type = REGCACHE_NONE,
},
};
static int adv748x_configure_regmap(struct adv748x_state *state, int region)
{
int err;
if (!state->i2c_clients[region])
return -ENODEV;
state->regmap[region] =
devm_regmap_init_i2c(state->i2c_clients[region],
&adv748x_regmap_cnf[region]);
if (IS_ERR(state->regmap[region])) {
err = PTR_ERR(state->regmap[region]);
adv_err(state,
"Error initializing regmap %d with error %d\n",
region, err);
return -EINVAL;
}
return 0;
}
/* Default addresses for the I2C pages */
static int adv748x_i2c_addresses[ADV748X_PAGE_MAX] = {
ADV748X_I2C_IO,
ADV748X_I2C_DPLL,
ADV748X_I2C_CP,
ADV748X_I2C_HDMI,
ADV748X_I2C_EDID,
ADV748X_I2C_REPEATER,
ADV748X_I2C_INFOFRAME,
ADV748X_I2C_CEC,
ADV748X_I2C_SDP,
ADV748X_I2C_TXB,
ADV748X_I2C_TXA,
};
static int adv748x_read_check(struct adv748x_state *state,
int client_page, u8 reg)
{
struct i2c_client *client = state->i2c_clients[client_page];
int err;
unsigned int val;
err = regmap_read(state->regmap[client_page], reg, &val);
if (err) {
adv_err(state, "error reading %02x, %02x\n",
client->addr, reg);
return err;
}
return val;
}
int adv748x_read(struct adv748x_state *state, u8 page, u8 reg)
{
return adv748x_read_check(state, page, reg);
}
int adv748x_write(struct adv748x_state *state, u8 page, u8 reg, u8 value)
{
return regmap_write(state->regmap[page], reg, value);
}
/* adv748x_write_block(): Write raw data with a maximum of I2C_SMBUS_BLOCK_MAX
* size to one or more registers.
*
* A value of zero will be returned on success, a negative errno will
* be returned in error cases.
*/
int adv748x_write_block(struct adv748x_state *state, int client_page,
unsigned int init_reg, const void *val,
size_t val_len)
{
struct regmap *regmap = state->regmap[client_page];
if (val_len > I2C_SMBUS_BLOCK_MAX)
val_len = I2C_SMBUS_BLOCK_MAX;
return regmap_raw_write(regmap, init_reg, val, val_len);
}
static struct i2c_client *adv748x_dummy_client(struct adv748x_state *state,
u8 addr, u8 io_reg)
{
struct i2c_client *client = state->client;
if (addr)
io_write(state, io_reg, addr << 1);
return i2c_new_dummy(client->adapter, io_read(state, io_reg) >> 1);
}
static void adv748x_unregister_clients(struct adv748x_state *state)
{
unsigned int i;
for (i = 1; i < ARRAY_SIZE(state->i2c_clients); ++i) {
if (state->i2c_clients[i])
i2c_unregister_device(state->i2c_clients[i]);
}
}
static int adv748x_initialise_clients(struct adv748x_state *state)
{
int i;
int ret;
for (i = ADV748X_PAGE_DPLL; i < ADV748X_PAGE_MAX; ++i) {
state->i2c_clients[i] =
adv748x_dummy_client(state, adv748x_i2c_addresses[i],
ADV748X_IO_SLAVE_ADDR_BASE + i);
if (state->i2c_clients[i] == NULL) {
adv_err(state, "failed to create i2c client %u\n", i);
return -ENOMEM;
}
ret = adv748x_configure_regmap(state, i);
if (ret)
return ret;
}
return 0;
}
/**
* struct adv748x_reg_value - Register write instruction
* @page: Regmap page identifier
* @reg: I2C register
* @value: value to write to @page at @reg
*/
struct adv748x_reg_value {
u8 page;
u8 reg;
u8 value;
};
static int adv748x_write_regs(struct adv748x_state *state,
const struct adv748x_reg_value *regs)
{
int ret;
while (regs->page != ADV748X_PAGE_EOR) {
if (regs->page == ADV748X_PAGE_WAIT) {
msleep(regs->value);
} else {
ret = adv748x_write(state, regs->page, regs->reg,
regs->value);
if (ret < 0) {
adv_err(state,
"Error regs page: 0x%02x reg: 0x%02x\n",
regs->page, regs->reg);
return ret;
}
}
regs++;
}
return 0;
}
/* -----------------------------------------------------------------------------
* TXA and TXB
*/
static const struct adv748x_reg_value adv748x_power_up_txa_4lane[] = {
{ADV748X_PAGE_TXA, 0x00, 0x84}, /* Enable 4-lane MIPI */
{ADV748X_PAGE_TXA, 0x00, 0xa4}, /* Set Auto DPHY Timing */
{ADV748X_PAGE_TXA, 0x31, 0x82}, /* ADI Required Write */
{ADV748X_PAGE_TXA, 0x1e, 0x40}, /* ADI Required Write */
{ADV748X_PAGE_TXA, 0xda, 0x01}, /* i2c_mipi_pll_en - 1'b1 */
{ADV748X_PAGE_WAIT, 0x00, 0x02},/* delay 2 */
{ADV748X_PAGE_TXA, 0x00, 0x24 },/* Power-up CSI-TX */
{ADV748X_PAGE_WAIT, 0x00, 0x01},/* delay 1 */
{ADV748X_PAGE_TXA, 0xc1, 0x2b}, /* ADI Required Write */
{ADV748X_PAGE_WAIT, 0x00, 0x01},/* delay 1 */
{ADV748X_PAGE_TXA, 0x31, 0x80}, /* ADI Required Write */
{ADV748X_PAGE_EOR, 0xff, 0xff} /* End of register table */
};
static const struct adv748x_reg_value adv748x_power_down_txa_4lane[] = {
{ADV748X_PAGE_TXA, 0x31, 0x82}, /* ADI Required Write */
{ADV748X_PAGE_TXA, 0x1e, 0x00}, /* ADI Required Write */
{ADV748X_PAGE_TXA, 0x00, 0x84}, /* Enable 4-lane MIPI */
{ADV748X_PAGE_TXA, 0xda, 0x01}, /* i2c_mipi_pll_en - 1'b1 */
{ADV748X_PAGE_TXA, 0xc1, 0x3b}, /* ADI Required Write */
{ADV748X_PAGE_EOR, 0xff, 0xff} /* End of register table */
};
static const struct adv748x_reg_value adv748x_power_up_txb_1lane[] = {
{ADV748X_PAGE_TXB, 0x00, 0x81}, /* Enable 1-lane MIPI */
{ADV748X_PAGE_TXB, 0x00, 0xa1}, /* Set Auto DPHY Timing */
{ADV748X_PAGE_TXB, 0x31, 0x82}, /* ADI Required Write */
{ADV748X_PAGE_TXB, 0x1e, 0x40}, /* ADI Required Write */
{ADV748X_PAGE_TXB, 0xda, 0x01}, /* i2c_mipi_pll_en - 1'b1 */
{ADV748X_PAGE_WAIT, 0x00, 0x02},/* delay 2 */
{ADV748X_PAGE_TXB, 0x00, 0x21 },/* Power-up CSI-TX */
{ADV748X_PAGE_WAIT, 0x00, 0x01},/* delay 1 */
{ADV748X_PAGE_TXB, 0xc1, 0x2b}, /* ADI Required Write */
{ADV748X_PAGE_WAIT, 0x00, 0x01},/* delay 1 */
{ADV748X_PAGE_TXB, 0x31, 0x80}, /* ADI Required Write */
{ADV748X_PAGE_EOR, 0xff, 0xff} /* End of register table */
};
static const struct adv748x_reg_value adv748x_power_down_txb_1lane[] = {
{ADV748X_PAGE_TXB, 0x31, 0x82}, /* ADI Required Write */
{ADV748X_PAGE_TXB, 0x1e, 0x00}, /* ADI Required Write */
{ADV748X_PAGE_TXB, 0x00, 0x81}, /* Enable 4-lane MIPI */
{ADV748X_PAGE_TXB, 0xda, 0x01}, /* i2c_mipi_pll_en - 1'b1 */
{ADV748X_PAGE_TXB, 0xc1, 0x3b}, /* ADI Required Write */
{ADV748X_PAGE_EOR, 0xff, 0xff} /* End of register table */
};
int adv748x_txa_power(struct adv748x_state *state, bool on)
{
int val;
val = txa_read(state, ADV748X_CSI_FS_AS_LS);
if (val < 0)
return val;
/*
* This test against BIT(6) is not documented by the datasheet, but was
* specified in the downstream driver.
* Track with a WARN_ONCE to determine if it is ever set by HW.
*/
WARN_ONCE((on && val & ADV748X_CSI_FS_AS_LS_UNKNOWN),
"Enabling with unknown bit set");
if (on)
return adv748x_write_regs(state, adv748x_power_up_txa_4lane);
return adv748x_write_regs(state, adv748x_power_down_txa_4lane);
}
int adv748x_txb_power(struct adv748x_state *state, bool on)
{
int val;
val = txb_read(state, ADV748X_CSI_FS_AS_LS);
if (val < 0)
return val;
/*
* This test against BIT(6) is not documented by the datasheet, but was
* specified in the downstream driver.
* Track with a WARN_ONCE to determine if it is ever set by HW.
*/
WARN_ONCE((on && val & ADV748X_CSI_FS_AS_LS_UNKNOWN),
"Enabling with unknown bit set");
if (on)
return adv748x_write_regs(state, adv748x_power_up_txb_1lane);
return adv748x_write_regs(state, adv748x_power_down_txb_1lane);
}
/* -----------------------------------------------------------------------------
* Media Operations
*/
static const struct media_entity_operations adv748x_media_ops = {
.link_validate = v4l2_subdev_link_validate,
};
/* -----------------------------------------------------------------------------
* HW setup
*/
static const struct adv748x_reg_value adv748x_sw_reset[] = {
{ADV748X_PAGE_IO, 0xff, 0xff}, /* SW reset */
{ADV748X_PAGE_WAIT, 0x00, 0x05},/* delay 5 */
{ADV748X_PAGE_IO, 0x01, 0x76}, /* ADI Required Write */
{ADV748X_PAGE_IO, 0xf2, 0x01}, /* Enable I2C Read Auto-Increment */
{ADV748X_PAGE_EOR, 0xff, 0xff} /* End of register table */
};
static const struct adv748x_reg_value adv748x_set_slave_address[] = {
{ADV748X_PAGE_IO, 0xf3, ADV748X_I2C_DPLL << 1},
{ADV748X_PAGE_IO, 0xf4, ADV748X_I2C_CP << 1},
{ADV748X_PAGE_IO, 0xf5, ADV748X_I2C_HDMI << 1},
{ADV748X_PAGE_IO, 0xf6, ADV748X_I2C_EDID << 1},
{ADV748X_PAGE_IO, 0xf7, ADV748X_I2C_REPEATER << 1},
{ADV748X_PAGE_IO, 0xf8, ADV748X_I2C_INFOFRAME << 1},
{ADV748X_PAGE_IO, 0xfa, ADV748X_I2C_CEC << 1},
{ADV748X_PAGE_IO, 0xfb, ADV748X_I2C_SDP << 1},
{ADV748X_PAGE_IO, 0xfc, ADV748X_I2C_TXB << 1},
{ADV748X_PAGE_IO, 0xfd, ADV748X_I2C_TXA << 1},
{ADV748X_PAGE_EOR, 0xff, 0xff} /* End of register table */
};
/* Supported Formats For Script Below */
/* - 01-29 HDMI to MIPI TxA CSI 4-Lane - RGB888: */
static const struct adv748x_reg_value adv748x_init_txa_4lane[] = {
/* Disable chip powerdown & Enable HDMI Rx block */
{ADV748X_PAGE_IO, 0x00, 0x40},
{ADV748X_PAGE_REPEATER, 0x40, 0x83}, /* Enable HDCP 1.1 */
{ADV748X_PAGE_HDMI, 0x00, 0x08},/* Foreground Channel = A */
{ADV748X_PAGE_HDMI, 0x98, 0xff},/* ADI Required Write */
{ADV748X_PAGE_HDMI, 0x99, 0xa3},/* ADI Required Write */
{ADV748X_PAGE_HDMI, 0x9a, 0x00},/* ADI Required Write */
{ADV748X_PAGE_HDMI, 0x9b, 0x0a},/* ADI Required Write */
{ADV748X_PAGE_HDMI, 0x9d, 0x40},/* ADI Required Write */
{ADV748X_PAGE_HDMI, 0xcb, 0x09},/* ADI Required Write */
{ADV748X_PAGE_HDMI, 0x3d, 0x10},/* ADI Required Write */
{ADV748X_PAGE_HDMI, 0x3e, 0x7b},/* ADI Required Write */
{ADV748X_PAGE_HDMI, 0x3f, 0x5e},/* ADI Required Write */
{ADV748X_PAGE_HDMI, 0x4e, 0xfe},/* ADI Required Write */
{ADV748X_PAGE_HDMI, 0x4f, 0x18},/* ADI Required Write */
{ADV748X_PAGE_HDMI, 0x57, 0xa3},/* ADI Required Write */
{ADV748X_PAGE_HDMI, 0x58, 0x04},/* ADI Required Write */
{ADV748X_PAGE_HDMI, 0x85, 0x10},/* ADI Required Write */
{ADV748X_PAGE_HDMI, 0x83, 0x00},/* Enable All Terminations */
{ADV748X_PAGE_HDMI, 0xa3, 0x01},/* ADI Required Write */
{ADV748X_PAGE_HDMI, 0xbe, 0x00},/* ADI Required Write */
{ADV748X_PAGE_HDMI, 0x6c, 0x01},/* HPA Manual Enable */
{ADV748X_PAGE_HDMI, 0xf8, 0x01},/* HPA Asserted */
{ADV748X_PAGE_HDMI, 0x0f, 0x00},/* Audio Mute Speed Set to Fastest */
/* (Smallest Step Size) */
{ADV748X_PAGE_IO, 0x04, 0x02}, /* RGB Out of CP */
{ADV748X_PAGE_IO, 0x12, 0xf0}, /* CSC Depends on ip Packets, SDR 444 */
{ADV748X_PAGE_IO, 0x17, 0x80}, /* Luma & Chroma can reach 254d */
{ADV748X_PAGE_IO, 0x03, 0x86}, /* CP-Insert_AV_Code */
{ADV748X_PAGE_CP, 0x7c, 0x00}, /* ADI Required Write */
{ADV748X_PAGE_IO, 0x0c, 0xe0}, /* Enable LLC_DLL & Double LLC Timing */
{ADV748X_PAGE_IO, 0x0e, 0xdd}, /* LLC/PIX/SPI PINS TRISTATED AUD */
/* Outputs Enabled */
{ADV748X_PAGE_IO, 0x10, 0xa0}, /* Enable 4-lane CSI Tx & Pixel Port */
{ADV748X_PAGE_TXA, 0x00, 0x84}, /* Enable 4-lane MIPI */
{ADV748X_PAGE_TXA, 0x00, 0xa4}, /* Set Auto DPHY Timing */
{ADV748X_PAGE_TXA, 0xdb, 0x10}, /* ADI Required Write */
{ADV748X_PAGE_TXA, 0xd6, 0x07}, /* ADI Required Write */
{ADV748X_PAGE_TXA, 0xc4, 0x0a}, /* ADI Required Write */
{ADV748X_PAGE_TXA, 0x71, 0x33}, /* ADI Required Write */
{ADV748X_PAGE_TXA, 0x72, 0x11}, /* ADI Required Write */
{ADV748X_PAGE_TXA, 0xf0, 0x00}, /* i2c_dphy_pwdn - 1'b0 */
{ADV748X_PAGE_TXA, 0x31, 0x82}, /* ADI Required Write */
{ADV748X_PAGE_TXA, 0x1e, 0x40}, /* ADI Required Write */
{ADV748X_PAGE_TXA, 0xda, 0x01}, /* i2c_mipi_pll_en - 1'b1 */
{ADV748X_PAGE_WAIT, 0x00, 0x02},/* delay 2 */
{ADV748X_PAGE_TXA, 0x00, 0x24 },/* Power-up CSI-TX */
{ADV748X_PAGE_WAIT, 0x00, 0x01},/* delay 1 */
{ADV748X_PAGE_TXA, 0xc1, 0x2b}, /* ADI Required Write */
{ADV748X_PAGE_WAIT, 0x00, 0x01},/* delay 1 */
{ADV748X_PAGE_TXA, 0x31, 0x80}, /* ADI Required Write */
{ADV748X_PAGE_EOR, 0xff, 0xff} /* End of register table */
};
/* 02-01 Analog CVBS to MIPI TX-B CSI 1-Lane - */
/* Autodetect CVBS Single Ended In Ain 1 - MIPI Out */
static const struct adv748x_reg_value adv748x_init_txb_1lane[] = {
{ADV748X_PAGE_IO, 0x00, 0x30}, /* Disable chip powerdown Rx */
{ADV748X_PAGE_IO, 0xf2, 0x01}, /* Enable I2C Read Auto-Increment */
{ADV748X_PAGE_IO, 0x0e, 0xff}, /* LLC/PIX/AUD/SPI PINS TRISTATED */
{ADV748X_PAGE_SDP, 0x0f, 0x00}, /* Exit Power Down Mode */
{ADV748X_PAGE_SDP, 0x52, 0xcd}, /* ADI Required Write */
{ADV748X_PAGE_SDP, 0x0e, 0x80}, /* ADI Required Write */
{ADV748X_PAGE_SDP, 0x9c, 0x00}, /* ADI Required Write */
{ADV748X_PAGE_SDP, 0x9c, 0xff}, /* ADI Required Write */
{ADV748X_PAGE_SDP, 0x0e, 0x00}, /* ADI Required Write */
/* ADI recommended writes for improved video quality */
{ADV748X_PAGE_SDP, 0x80, 0x51}, /* ADI Required Write */
{ADV748X_PAGE_SDP, 0x81, 0x51}, /* ADI Required Write */
{ADV748X_PAGE_SDP, 0x82, 0x68}, /* ADI Required Write */
{ADV748X_PAGE_SDP, 0x03, 0x42}, /* Tri-S Output , PwrDwn 656 pads */
{ADV748X_PAGE_SDP, 0x04, 0xb5}, /* ITU-R BT.656-4 compatible */
{ADV748X_PAGE_SDP, 0x13, 0x00}, /* ADI Required Write */
{ADV748X_PAGE_SDP, 0x17, 0x41}, /* Select SH1 */
{ADV748X_PAGE_SDP, 0x31, 0x12}, /* ADI Required Write */
{ADV748X_PAGE_SDP, 0xe6, 0x4f}, /* V bit end pos manually in NTSC */
/* Enable 1-Lane MIPI Tx, */
/* enable pixel output and route SD through Pixel port */
{ADV748X_PAGE_IO, 0x10, 0x70},
{ADV748X_PAGE_TXB, 0x00, 0x81}, /* Enable 1-lane MIPI */
{ADV748X_PAGE_TXB, 0x00, 0xa1}, /* Set Auto DPHY Timing */
{ADV748X_PAGE_TXB, 0xd2, 0x40}, /* ADI Required Write */
{ADV748X_PAGE_TXB, 0xc4, 0x0a}, /* ADI Required Write */
{ADV748X_PAGE_TXB, 0x71, 0x33}, /* ADI Required Write */
{ADV748X_PAGE_TXB, 0x72, 0x11}, /* ADI Required Write */
{ADV748X_PAGE_TXB, 0xf0, 0x00}, /* i2c_dphy_pwdn - 1'b0 */
{ADV748X_PAGE_TXB, 0x31, 0x82}, /* ADI Required Write */
{ADV748X_PAGE_TXB, 0x1e, 0x40}, /* ADI Required Write */
{ADV748X_PAGE_TXB, 0xda, 0x01}, /* i2c_mipi_pll_en - 1'b1 */
{ADV748X_PAGE_WAIT, 0x00, 0x02},/* delay 2 */
{ADV748X_PAGE_TXB, 0x00, 0x21 },/* Power-up CSI-TX */
{ADV748X_PAGE_WAIT, 0x00, 0x01},/* delay 1 */
{ADV748X_PAGE_TXB, 0xc1, 0x2b}, /* ADI Required Write */
{ADV748X_PAGE_WAIT, 0x00, 0x01},/* delay 1 */
{ADV748X_PAGE_TXB, 0x31, 0x80}, /* ADI Required Write */
{ADV748X_PAGE_EOR, 0xff, 0xff} /* End of register table */
};
static int adv748x_reset(struct adv748x_state *state)
{
int ret;
ret = adv748x_write_regs(state, adv748x_sw_reset);
if (ret < 0)
return ret;
ret = adv748x_write_regs(state, adv748x_set_slave_address);
if (ret < 0)
return ret;
/* Init and power down TXA */
ret = adv748x_write_regs(state, adv748x_init_txa_4lane);
if (ret)
return ret;
adv748x_txa_power(state, 0);
/* Init and power down TXB */
ret = adv748x_write_regs(state, adv748x_init_txb_1lane);
if (ret)
return ret;
adv748x_txb_power(state, 0);
/* Disable chip powerdown & Enable HDMI Rx block */
io_write(state, ADV748X_IO_PD, ADV748X_IO_PD_RX_EN);
/* Enable 4-lane CSI Tx & Pixel Port */
io_write(state, ADV748X_IO_10, ADV748X_IO_10_CSI4_EN |
ADV748X_IO_10_CSI1_EN |
ADV748X_IO_10_PIX_OUT_EN);
/* Use vid_std and v_freq as freerun resolution for CP */
cp_clrset(state, ADV748X_CP_CLMP_POS, ADV748X_CP_CLMP_POS_DIS_AUTO,
ADV748X_CP_CLMP_POS_DIS_AUTO);
return 0;
}
static int adv748x_identify_chip(struct adv748x_state *state)
{
int msb, lsb;
lsb = io_read(state, ADV748X_IO_CHIP_REV_ID_1);
msb = io_read(state, ADV748X_IO_CHIP_REV_ID_2);
if (lsb < 0 || msb < 0) {
adv_err(state, "Failed to read chip revision\n");
return -EIO;
}
adv_info(state, "chip found @ 0x%02x revision %02x%02x\n",
state->client->addr << 1, lsb, msb);
return 0;
}
/* -----------------------------------------------------------------------------
* i2c driver
*/
void adv748x_subdev_init(struct v4l2_subdev *sd, struct adv748x_state *state,
const struct v4l2_subdev_ops *ops, u32 function,
const char *ident)
{
v4l2_subdev_init(sd, ops);
sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
/* the owner is the same as the i2c_client's driver owner */
sd->owner = state->dev->driver->owner;
sd->dev = state->dev;
v4l2_set_subdevdata(sd, state);
/* initialize name */
snprintf(sd->name, sizeof(sd->name), "%s %d-%04x %s",
state->dev->driver->name,
i2c_adapter_id(state->client->adapter),
state->client->addr, ident);
sd->entity.function = function;
sd->entity.ops = &adv748x_media_ops;
}
static int adv748x_parse_dt(struct adv748x_state *state)
{
struct device_node *ep_np = NULL;
struct of_endpoint ep;
bool found = false;
for_each_endpoint_of_node(state->dev->of_node, ep_np) {
of_graph_parse_endpoint(ep_np, &ep);
adv_info(state, "Endpoint %s on port %d",
of_node_full_name(ep.local_node),
ep.port);
if (ep.port >= ADV748X_PORT_MAX) {
adv_err(state, "Invalid endpoint %s on port %d",
of_node_full_name(ep.local_node),
ep.port);
continue;
}
if (state->endpoints[ep.port]) {
adv_err(state,
"Multiple port endpoints are not supported");
continue;
}
of_node_get(ep_np);
state->endpoints[ep.port] = ep_np;
found = true;
}
return found ? 0 : -ENODEV;
}
static void adv748x_dt_cleanup(struct adv748x_state *state)
{
unsigned int i;
for (i = 0; i < ADV748X_PORT_MAX; i++)
of_node_put(state->endpoints[i]);
}
static int adv748x_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct adv748x_state *state;
int ret;
/* Check if the adapter supports the needed features */
if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
return -EIO;
state = kzalloc(sizeof(struct adv748x_state), GFP_KERNEL);
if (!state)
return -ENOMEM;
mutex_init(&state->mutex);
state->dev = &client->dev;
state->client = client;
state->i2c_clients[ADV748X_PAGE_IO] = client;
i2c_set_clientdata(client, state);
/* Discover and process ports declared by the Device tree endpoints */
ret = adv748x_parse_dt(state);
if (ret) {
adv_err(state, "Failed to parse device tree");
goto err_free_mutex;
}
/* Configure IO Regmap region */
ret = adv748x_configure_regmap(state, ADV748X_PAGE_IO);
if (ret) {
adv_err(state, "Error configuring IO regmap region");
goto err_cleanup_dt;
}
ret = adv748x_identify_chip(state);
if (ret) {
adv_err(state, "Failed to identify chip");
goto err_cleanup_clients;
}
/* Configure remaining pages as I2C clients with regmap access */
ret = adv748x_initialise_clients(state);
if (ret) {
adv_err(state, "Failed to setup client regmap pages");
goto err_cleanup_clients;
}
/* SW reset ADV748X to its default values */
ret = adv748x_reset(state);
if (ret) {
adv_err(state, "Failed to reset hardware");
goto err_cleanup_clients;
}
/* Initialise HDMI */
ret = adv748x_hdmi_init(&state->hdmi);
if (ret) {
adv_err(state, "Failed to probe HDMI");
goto err_cleanup_clients;
}
/* Initialise AFE */
ret = adv748x_afe_init(&state->afe);
if (ret) {
adv_err(state, "Failed to probe AFE");
goto err_cleanup_hdmi;
}
/* Initialise TXA */
ret = adv748x_csi2_init(state, &state->txa);
if (ret) {
adv_err(state, "Failed to probe TXA");
goto err_cleanup_afe;
}
/* Initialise TXB */
ret = adv748x_csi2_init(state, &state->txb);
if (ret) {
adv_err(state, "Failed to probe TXB");
goto err_cleanup_txa;
}
return 0;
err_cleanup_txa:
adv748x_csi2_cleanup(&state->txa);
err_cleanup_afe:
adv748x_afe_cleanup(&state->afe);
err_cleanup_hdmi:
adv748x_hdmi_cleanup(&state->hdmi);
err_cleanup_clients:
adv748x_unregister_clients(state);
err_cleanup_dt:
adv748x_dt_cleanup(state);
err_free_mutex:
mutex_destroy(&state->mutex);
kfree(state);
return ret;
}
static int adv748x_remove(struct i2c_client *client)
{
struct adv748x_state *state = i2c_get_clientdata(client);
adv748x_afe_cleanup(&state->afe);
adv748x_hdmi_cleanup(&state->hdmi);
adv748x_csi2_cleanup(&state->txa);
adv748x_csi2_cleanup(&state->txb);
adv748x_unregister_clients(state);
adv748x_dt_cleanup(state);
mutex_destroy(&state->mutex);
kfree(state);
return 0;
}
static const struct i2c_device_id adv748x_id[] = {
{ "adv7481", 0 },
{ "adv7482", 0 },
{ },
};
MODULE_DEVICE_TABLE(i2c, adv748x_id);
static const struct of_device_id adv748x_of_table[] = {
{ .compatible = "adi,adv7481", },
{ .compatible = "adi,adv7482", },
{ }
};
MODULE_DEVICE_TABLE(of, adv748x_of_table);
static struct i2c_driver adv748x_driver = {
.driver = {
.name = "adv748x",
.of_match_table = adv748x_of_table,
},
.probe = adv748x_probe,
.remove = adv748x_remove,
.id_table = adv748x_id,
};
module_i2c_driver(adv748x_driver);
MODULE_AUTHOR("Kieran Bingham <kieran.bingham@ideasonboard.com>");
MODULE_DESCRIPTION("ADV748X video decoder");
MODULE_LICENSE("GPL v2");