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/*
* Copyright (C) 2011 ST-Ericsson
* Author: Joakim Axelsson <joakim.axelsson@stericsson.com> for ST-Ericsson
* Author: Rajat Verma <rajat.verma@stericsson.com> for ST-Ericsson.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2, as
* published by the Free Software Foundation.
*/
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/err.h>
#include <linux/gpio.h>
#include <linux/mmio.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/regulator/consumer.h>
#include <linux/vmalloc.h>
#include <plat/pincfg.h>
#include <mach/gpio.h>
#include <mach/devices.h>
#include "board-u5500.h"
struct mmio_board_data{
int number_of_regulators;
struct regulator **mmio_regulators;
/* * Pin configs */
struct mmio_gpio xshutdown_pins[CAMERA_SLOT_END];
/* * Internal clocks */
struct clk *clk_ptr_bml;
struct clk *clk_ptr_ipi2c;
/* * External clocks */
struct clk *clk_ptr_ext[CAMERA_SLOT_END];
};
/*
* Fill names of regulators required for powering up the
* camera sensor in below array
*/
static char *regulator_names[] = {"v-mmio-camera" , "v-ana"};
static int mmio_clock_init(struct mmio_platform_data *pdata)
{
int err;
struct mmio_board_data *extra = pdata->extra;
extra->clk_ptr_ext[PRIMARY_CAMERA] =
clk_get(pdata->dev, "primary-cam");
if (IS_ERR(extra->clk_ptr_ext[PRIMARY_CAMERA])) {
err = PTR_ERR(extra->clk_ptr_ext[PRIMARY_CAMERA]);
dev_err(pdata->dev,
"Error %d clock 'primary-cam'\n", err);
goto err_pri_ext_clk;
}
extra->clk_ptr_ext[SECONDARY_CAMERA] =
clk_get(pdata->dev, "secondary-cam");
if (IS_ERR(extra->clk_ptr_ext[SECONDARY_CAMERA])) {
err = PTR_ERR(extra->clk_ptr_ext[SECONDARY_CAMERA]);
dev_err(pdata->dev,
"Error %d clock 'secondary-cam'\n", err);
goto err_sec_ext_clk;
}
return 0;
err_sec_ext_clk:
clk_put(extra->clk_ptr_ext[PRIMARY_CAMERA]);
err_pri_ext_clk:
return err;
}
static void mmio_clock_exit(struct mmio_platform_data *pdata)
{
struct mmio_board_data *extra = pdata->extra;
clk_put(extra->clk_ptr_ext[PRIMARY_CAMERA]);
clk_put(extra->clk_ptr_ext[SECONDARY_CAMERA]);
}
static int mmio_pin_cfg_init(struct mmio_platform_data *pdata)
{
struct mmio_board_data *extra = pdata->extra;
extra->xshutdown_pins[PRIMARY_CAMERA].gpio =
GPIO_PRIMARY_CAM_XSHUTDOWN;
extra->xshutdown_pins[PRIMARY_CAMERA].active_high = 0;
extra->xshutdown_pins[PRIMARY_CAMERA].udelay = 250;
extra->xshutdown_pins[SECONDARY_CAMERA].gpio =
GPIO_SECONDARY_CAM_XSHUTDOWN;
extra->xshutdown_pins[SECONDARY_CAMERA].active_high = 0;
extra->xshutdown_pins[SECONDARY_CAMERA].udelay = 250;
return 0;
}
static void mmio_pin_cfg_exit(struct mmio_platform_data *pdata)
{
struct mmio_board_data *extra = pdata->extra;
}
/*
* For now, both sensors on B5500/S5500 have some power up sequence. If
* different sequences are needed for primary and secondary sensors, it can
* be implemented easily. Just use camera_slot field of mmio_platform_data
* to determine which camera needs to be powered up
*/
static int mmio_power_init(struct mmio_platform_data *pdata)
{
int err = 0, i = 0;
struct mmio_board_data *extra = pdata->extra;
dev_dbg(pdata->dev , "Board %s() Enter\n", __func__);
extra->number_of_regulators = ARRAY_SIZE(regulator_names);
extra->mmio_regulators =
kzalloc(sizeof(struct regulator *) * extra->number_of_regulators,
GFP_KERNEL);
if (!extra->mmio_regulators) {
dev_err(pdata->dev
, "Error allocating memory for mmio regulators\n");
err = -ENOMEM;
goto err_no_mem_reg;
}
for (i = 0; i <
extra->number_of_regulators; i++) {
extra->mmio_regulators[i] =
regulator_get(pdata->dev, regulator_names[i]);
if (IS_ERR(extra->mmio_regulators[i])) {
err = PTR_ERR(extra->mmio_regulators[i]);
dev_err(pdata->dev
, "Error %d getting regulator '%s'\n"
, err, regulator_names[i]);
goto err_regulator;
}
}
dev_dbg(pdata->dev , "Board %s() Exit\n", __func__);
return 0;
err_regulator:
/*
* Return regulators we have already requested
*/
while (i--)
regulator_put(extra->mmio_regulators[i]);
kfree(extra->mmio_regulators);
err_no_mem_reg:
return err;
}
static void mmio_power_exit(struct mmio_platform_data *pdata)
{
int i = 0;
struct mmio_board_data *extra = pdata->extra;;
for (i = 0; i < extra->number_of_regulators; i++)
regulator_put(extra->mmio_regulators[i]);
kfree(extra->mmio_regulators);
}
static int mmio_platform_init(struct mmio_platform_data *pdata)
{
int err = 0;
struct mmio_board_data *extra = NULL;
dev_dbg(pdata->dev , "Board %s() Enter\n", __func__);
/*
* Alloc memory for our own extra data
*/
extra = kzalloc(sizeof(struct mmio_board_data), GFP_KERNEL);
if (!extra) {
dev_err(pdata->dev, "%s: memory alloc failed for "
"mmio_board_data\n", __func__);
err = -ENOMEM;
goto err_no_mem_extra;
}
/*
* Hook the data for other callbacks to use
*/
pdata->extra = extra;
pdata->camera_slot = -1;
err = mmio_power_init(pdata);
if (err)
goto err_regulator;
err = mmio_clock_init(pdata);
if (err)
goto err_clock;
err = mmio_pin_cfg_init(pdata);
if (err)
goto err_pin_cfg;
dev_dbg(pdata->dev , "Board %s() Exit\n", __func__);
return 0;
err_pin_cfg:
mmio_clock_exit(pdata);
err_clock:
mmio_power_exit(pdata);
err_regulator:
kfree(extra);
err_no_mem_extra:
return err;
}
static void mmio_platform_exit(struct mmio_platform_data *pdata)
{
struct mmio_board_data *extra = pdata->extra;
mmio_power_exit(pdata);
mmio_clock_exit(pdata);
mmio_pin_cfg_exit(pdata);
kfree(extra);
pdata->extra = NULL;
}
static int mmio_power_enable(struct mmio_platform_data *pdata)
{
int err = 0, i = 0;
struct mmio_board_data *extra = pdata->extra;
dev_dbg(pdata->dev , "Board %s() Enter\n", __func__);
/*
* Enable the regulators
*/
for (i = 0; i < extra->number_of_regulators; i++) {
err = regulator_enable(extra->mmio_regulators[i]);
if (IS_ERR(extra->mmio_regulators[i])) {
err = PTR_ERR(extra->mmio_regulators[i]);
dev_err(pdata->dev , "Error %d enabling regulator '%s'"
"\n", err, regulator_names[i]);
goto err_regulator;
}
}
dev_dbg(pdata->dev , "Board %s() Exit\n", __func__);
return 0;
err_regulator:
/*
* Disable regulators we already enabled
*/
while (i--)
regulator_disable(extra->mmio_regulators[i]);
return err;
}
static void mmio_power_disable(struct mmio_platform_data *pdata)
{
int i;
struct mmio_board_data *extra = pdata->extra;
/*
* Disable the regulators
*/
for (i = 0; i < extra->number_of_regulators; i++)
regulator_disable(extra->mmio_regulators[i]);
}
static int mmio_clock_enable(struct mmio_platform_data *pdata)
{
int err = 0;
struct mmio_board_data *extra = pdata->extra;
dev_dbg(pdata->dev , "Board %s() Enter\n", __func__);
/*
* Enable appropriate external clock
*/
err = clk_enable(extra->clk_ptr_ext[pdata->camera_slot]);
if (err) {
dev_err(pdata->dev, "Error activating clock for sensor %d, err"
"%d\n", pdata->camera_slot, err);
goto err_ext_clk;
}
dev_dbg(pdata->dev , "Board %s() Exit\n", __func__);
return 0;
err_ext_clk:
return err;
}
static void mmio_clock_disable(struct mmio_platform_data *pdata)
{
struct mmio_board_data *extra = pdata->extra;
clk_disable(extra->clk_ptr_ext[pdata->camera_slot]);
}
static int mmio_config_xshutdown_pins(struct mmio_platform_data *pdata,
enum mmio_select_xshutdown_t select,
int is_active_high)
{
int err = 0;
struct mmio_board_data *extra = pdata->extra;
dev_dbg(pdata->dev , "Board %s() Enter\n", __func__);
switch (select) {
case MMIO_ENABLE_XSHUTDOWN_HOST:
extra->xshutdown_pins[pdata->camera_slot].active_high =
is_active_high;
dev_dbg(pdata->dev , "Enabling Xshutdown GPIO PIN = %d",
extra->xshutdown_pins[pdata->camera_slot].gpio);
err = gpio_request
(extra->xshutdown_pins[pdata->camera_slot].gpio,
"MMIO GPIO");
if (err) {
dev_err(pdata->dev, "Error %d while requesting"
"Xshutdown MMIO GPIO\n",
err);
return err;
}
err = gpio_direction_output
(extra->xshutdown_pins[pdata->camera_slot].gpio,
0);
if (err) {
dev_err(pdata->dev, "Error %d while setting"
"Xshutdown MMIO GPIO"
"output mode\n", err);
return err;
}
break;
case MMIO_DISABLE_XSHUTDOWN:
dev_dbg(pdata->dev , "Disabling Xshutdown GPIO PIN = %d",
extra->xshutdown_pins[pdata->camera_slot].gpio);
gpio_free(extra->xshutdown_pins[pdata->camera_slot].gpio);
break;
default:
break;
}
if (err)
dev_err(pdata->dev , "Error configuring xshutdown, err = %d\n",
err);
return err;
}
static void mmio_set_xshutdown(struct mmio_platform_data *pdata)
{
struct mmio_board_data *extra = pdata->extra;
gpio_set_value(extra->xshutdown_pins[pdata->camera_slot].gpio ,
(extra->xshutdown_pins[pdata->camera_slot].active_high
? 1 : 0));
udelay(extra->xshutdown_pins[pdata->camera_slot].udelay);
}
/*
* TODO: This function would be removed in futute.
* Since this function is called frequently
* from HSM Camera code , it is kept for Legacy.
*/
static int mmio_config_i2c_pins(struct mmio_platform_data *pdata,
enum mmio_select_i2c_t select)
{
int err = 0;
switch (select) {
case MMIO_ACTIVATE_I2C_HOST:
dev_dbg(pdata->dev , "Activate I2C from Host called\n");
break;
case MMIO_DEACTIVATE_I2C:
dev_dbg(pdata->dev , "DeActivate I2C from Host called\n");
break;
default:
break;
}
return err;
}
static struct mmio_platform_data mmio_config = {
.platform_init = mmio_platform_init,
.platform_exit = mmio_platform_exit,
.power_enable = mmio_power_enable,
.power_disable = mmio_power_disable,
.clock_enable = mmio_clock_enable,
.clock_disable = mmio_clock_disable,
.config_i2c_pins = mmio_config_i2c_pins,
.config_xshutdown_pins = mmio_config_xshutdown_pins,
.set_xshutdown = mmio_set_xshutdown
};
struct platform_device u5500_mmio_device = {
.name = MMIO_NAME,
.id = -1,
.dev = {
.platform_data = &mmio_config,
}
};
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