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/* linux/drivers/media/video/samsung/tvout/s5p_tvout_common_lib.c
*
* Copyright (c) 2009 Samsung Electronics
* http://www.samsung.com/
*
* Common library file for SAMSUNG TVOUT driver
*
* 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/io.h>
#include <linux/slab.h>
#include <linux/err.h>
#include <linux/pm_runtime.h>
#include "s5p_tvout_common_lib.h"
#ifdef CONFIG_VCM
#include <plat/s5p-vcm.h>
#endif
#ifdef CONFIG_VCM
static atomic_t s5p_tvout_vcm_usage = ATOMIC_INIT(0);
static void tvout_tlb_invalidator(enum vcm_dev_id id)
{
#if (defined(CONFIG_EXYNOS_DEV_PD) && defined(CONFIG_PM_RUNTIME))
if (atomic_read(&s5p_tvout_vcm_usage) == 0) {
return (void)0;
}
#endif
}
static void tvout_pgd_base_specifier(enum vcm_dev_id id, unsigned long base)
{
#if (defined(CONFIG_EXYNOS_DEV_PD) && defined(CONFIG_PM_RUNTIME))
if (atomic_read(&s5p_tvout_vcm_usage) == 0) {
return (void)0;
}
#endif
}
static struct s5p_vcm_driver s5ptv_vcm_driver = {
.tlb_invalidator = &tvout_tlb_invalidator,
.pgd_base_specifier = &tvout_pgd_base_specifier,
.phys_alloc = NULL,
.phys_free = NULL,
};
#endif
#ifdef CONFIG_VCM
static struct vcm *s5p_vcm;
int s5p_tvout_vcm_create_unified(void)
{
s5p_vcm = vcm_create_unified((SZ_64M), VCM_DEV_TV,
&s5ptv_vcm_driver);
if (IS_ERR(s5p_vcm))
return PTR_ERR(s5p_vcm);
return 0;
}
int s5p_tvout_vcm_init(void)
{
if (vcm_activate(s5p_vcm) < 0)
return -1;
return 0;
}
void s5p_tvout_vcm_activate(void)
{
vcm_set_pgtable_base(VCM_DEV_TV);
}
void s5p_tvout_vcm_deactivate(void)
{
}
#endif
int s5p_tvout_map_resource_mem(
struct platform_device *pdev, char *name,
void __iomem **base, struct resource **res)
{
size_t size;
void __iomem *tmp_base;
struct resource *tmp_res;
tmp_res = platform_get_resource_byname(pdev, IORESOURCE_MEM, name);
if (!tmp_res)
goto not_found;
size = (tmp_res->end - tmp_res->start) + 1;
tmp_res = request_mem_region(tmp_res->start, size, tmp_res->name);
if (!tmp_res) {
tvout_err("%s: fail to get memory region\n", __func__);
goto err_on_request_mem_region;
}
tmp_base = ioremap(tmp_res->start, size);
if (!tmp_base) {
tvout_err("%s: fail to ioremap address region\n", __func__);
goto err_on_ioremap;
}
*res = tmp_res;
*base = tmp_base;
return 0;
err_on_ioremap:
release_resource(tmp_res);
kfree(tmp_res);
err_on_request_mem_region:
return -ENXIO;
not_found:
tvout_err("%s: fail to get IORESOURCE_MEM for %s\n", __func__, name);
return -ENODEV;
}
void s5p_tvout_unmap_resource_mem(
void __iomem *base, struct resource *res)
{
if (base)
iounmap(base);
if (res) {
release_resource(res);
kfree(res);
}
}
/* Libraries for runtime PM */
static struct device *s5p_tvout_dev;
void s5p_tvout_pm_runtime_enable(struct device *dev)
{
pm_runtime_enable(dev);
s5p_tvout_dev = dev;
}
void s5p_tvout_pm_runtime_disable(struct device *dev)
{
pm_runtime_disable(dev);
}
void s5p_tvout_pm_runtime_get(void)
{
pm_runtime_get_sync(s5p_tvout_dev);
#ifdef CONFIG_VCM
atomic_inc(&s5p_tvout_vcm_usage);
if (atomic_read(&s5p_tvout_vcm_usage) == 1)
s5p_tvout_vcm_activate();
#endif
}
void s5p_tvout_pm_runtime_put(void)
{
#ifdef CONFIG_VCM
if (atomic_read(&s5p_tvout_vcm_usage) == 1)
s5p_tvout_vcm_deactivate();
atomic_dec(&s5p_tvout_vcm_usage);
#endif
pm_runtime_put_sync(s5p_tvout_dev);
}
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