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/*
* linux/arch/arm/mach-tegra/audio_manager.c
*
* Audio Manager for tegra soc
*
* Copyright (C) 2010-2011 NVIDIA Corporation
*
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/io.h>
#include <linux/slab.h>
#include <linux/mutex.h>
#include <linux/clk.h>
#include <linux/err.h>
#include "clock.h"
#include <mach/iomap.h>
#include <mach/pinmux.h>
#include <mach/tegra_das.h>
struct audio_manager_context {
struct clk *mclk;
struct clk *pmc_clk;
int mclk_refcnt;
int mclk_rate;
int mclk_parent;
};
struct audio_manager_context *aud_manager;
int tegra_das_set_connection(enum tegra_das_port_con_id new_con_id)
{
return 0;
}
EXPORT_SYMBOL_GPL(tegra_das_set_connection);
int tegra_das_get_connection(void)
{
return 0;
}
EXPORT_SYMBOL_GPL(tegra_das_get_connection);
/* if is_normal is true then power mode is normal else tristated */
int tegra_das_power_mode(bool is_normal)
{
int err = 0;
/*
if (is_normal == true) {
err = tegra_das_enable_mclk();
} else {
err = tegra_das_disable_mclk();
}*/
return err;
}
EXPORT_SYMBOL_GPL(tegra_das_power_mode);
int tegra_das_open(void)
{
int err = 0;
aud_manager = kzalloc(sizeof(struct audio_manager_context), GFP_KERNEL);
if (!aud_manager)
return -ENOMEM;
aud_manager->mclk = tegra_get_clock_by_name("extern1");
if (!aud_manager->mclk) {
pr_err(" err in getting mclk \n");
err = -ENODEV;
goto fail_clock;
}
aud_manager->pmc_clk = clk_get_sys("clk_out_1", "extern1");
if (IS_ERR_OR_NULL(aud_manager->pmc_clk))
{
pr_err("%s can't get pmc clock\n", __func__);
err = -ENODEV;
aud_manager->pmc_clk = 0;
goto fail_clock;
}
return err;
fail_clock:
tegra_das_close();
return err;
}
EXPORT_SYMBOL_GPL(tegra_das_open);
int tegra_das_close(void)
{
if (aud_manager->mclk)
clk_put(aud_manager->mclk);
if (aud_manager->pmc_clk)
clk_put(aud_manager->pmc_clk);
kfree(aud_manager);
return 0;
}
EXPORT_SYMBOL_GPL(tegra_das_close);
void tegra_das_get_all_regs(struct das_regs_cache* regs)
{
}
EXPORT_SYMBOL_GPL(tegra_das_get_all_regs);
void tegra_das_set_all_regs(struct das_regs_cache* regs)
{
}
EXPORT_SYMBOL_GPL(tegra_das_set_all_regs);
int tegra_das_set_mclk_parent(int parent)
{
/* FIXME ; set parent based on need */
struct clk *mclk_source = clk_get_sys(NULL, "pll_a_out0");
clk_set_parent(aud_manager->mclk, mclk_source);
return 0;
}
EXPORT_SYMBOL_GPL(tegra_das_set_mclk_parent);
int tegra_das_enable_mclk(void)
{
int err = 0;
if (!aud_manager->mclk_refcnt) {
if (aud_manager->mclk && aud_manager->pmc_clk) {
tegra_das_set_mclk_parent(0);
if (clk_enable(aud_manager->mclk)) {
err = PTR_ERR(aud_manager->mclk);
return err;
}
if (clk_enable(aud_manager->pmc_clk)) {
clk_disable(aud_manager->mclk);
err = PTR_ERR(aud_manager->pmc_clk);
return err;
}
}
}
aud_manager->mclk_refcnt++;
return err;
}
EXPORT_SYMBOL_GPL(tegra_das_enable_mclk);
int tegra_das_disable_mclk(void)
{
int err = 0;
if (aud_manager->mclk_refcnt > 0) {
aud_manager->mclk_refcnt--;
if (aud_manager->mclk_refcnt == 0) {
if (aud_manager->mclk)
clk_disable(aud_manager->mclk);
if (aud_manager->pmc_clk)
clk_disable(aud_manager->pmc_clk);
}
}
return err;
}
EXPORT_SYMBOL_GPL(tegra_das_disable_mclk);
int tegra_das_set_mclk_rate(int rate)
{
/* FIXME: change the clock after disabling it if needed */
aud_manager->mclk_rate = rate;
clk_set_rate(aud_manager->mclk, rate);
return 0;
}
EXPORT_SYMBOL_GPL(tegra_das_set_mclk_rate);
MODULE_LICENSE("GPL");
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