01840bbe5f
Fixes the following sparse warnings: sound/soc/tegra/tegra_das.c:215:8: warning: Using plain integer as NULL pointer sound/soc/tegra/tegra_das.c:237:8: warning: Using plain integer as NULL pointer sound/soc/tegra/tegra_pcm.c:370:32: warning: symbol 'tegra_pcm_platform' was not declared. Should it be static? Signed-off-by: Olof Johansson <olof@lixom.net> Acked-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
265 lines
5.8 KiB
C
265 lines
5.8 KiB
C
/*
|
|
* tegra_das.c - Tegra DAS driver
|
|
*
|
|
* Author: Stephen Warren <swarren@nvidia.com>
|
|
* Copyright (C) 2010 - NVIDIA, Inc.
|
|
*
|
|
* 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.
|
|
*
|
|
* 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 St, Fifth Floor, Boston, MA
|
|
* 02110-1301 USA
|
|
*
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/debugfs.h>
|
|
#include <linux/device.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/seq_file.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/io.h>
|
|
#include <mach/iomap.h>
|
|
#include <sound/soc.h>
|
|
#include "tegra_das.h"
|
|
|
|
#define DRV_NAME "tegra-das"
|
|
|
|
static struct tegra_das *das;
|
|
|
|
static inline void tegra_das_write(u32 reg, u32 val)
|
|
{
|
|
__raw_writel(val, das->regs + reg);
|
|
}
|
|
|
|
static inline u32 tegra_das_read(u32 reg)
|
|
{
|
|
return __raw_readl(das->regs + reg);
|
|
}
|
|
|
|
int tegra_das_connect_dap_to_dac(int dap, int dac)
|
|
{
|
|
u32 addr;
|
|
u32 reg;
|
|
|
|
if (!das)
|
|
return -ENODEV;
|
|
|
|
addr = TEGRA_DAS_DAP_CTRL_SEL +
|
|
(dap * TEGRA_DAS_DAP_CTRL_SEL_STRIDE);
|
|
reg = dac << TEGRA_DAS_DAP_CTRL_SEL_DAP_CTRL_SEL_P;
|
|
|
|
tegra_das_write(addr, reg);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(tegra_das_connect_dap_to_dac);
|
|
|
|
int tegra_das_connect_dap_to_dap(int dap, int otherdap, int master,
|
|
int sdata1rx, int sdata2rx)
|
|
{
|
|
u32 addr;
|
|
u32 reg;
|
|
|
|
if (!das)
|
|
return -ENODEV;
|
|
|
|
addr = TEGRA_DAS_DAP_CTRL_SEL +
|
|
(dap * TEGRA_DAS_DAP_CTRL_SEL_STRIDE);
|
|
reg = otherdap << TEGRA_DAS_DAP_CTRL_SEL_DAP_CTRL_SEL_P |
|
|
!!sdata2rx << TEGRA_DAS_DAP_CTRL_SEL_DAP_SDATA2_TX_RX_P |
|
|
!!sdata1rx << TEGRA_DAS_DAP_CTRL_SEL_DAP_SDATA1_TX_RX_P |
|
|
!!master << TEGRA_DAS_DAP_CTRL_SEL_DAP_MS_SEL_P;
|
|
|
|
tegra_das_write(addr, reg);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(tegra_das_connect_dap_to_dap);
|
|
|
|
int tegra_das_connect_dac_to_dap(int dac, int dap)
|
|
{
|
|
u32 addr;
|
|
u32 reg;
|
|
|
|
if (!das)
|
|
return -ENODEV;
|
|
|
|
addr = TEGRA_DAS_DAC_INPUT_DATA_CLK_SEL +
|
|
(dac * TEGRA_DAS_DAC_INPUT_DATA_CLK_SEL_STRIDE);
|
|
reg = dap << TEGRA_DAS_DAC_INPUT_DATA_CLK_SEL_DAC_CLK_SEL_P |
|
|
dap << TEGRA_DAS_DAC_INPUT_DATA_CLK_SEL_DAC_SDATA1_SEL_P |
|
|
dap << TEGRA_DAS_DAC_INPUT_DATA_CLK_SEL_DAC_SDATA2_SEL_P;
|
|
|
|
tegra_das_write(addr, reg);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(tegra_das_connect_dac_to_dap);
|
|
|
|
#ifdef CONFIG_DEBUG_FS
|
|
static int tegra_das_show(struct seq_file *s, void *unused)
|
|
{
|
|
int i;
|
|
u32 addr;
|
|
u32 reg;
|
|
|
|
for (i = 0; i < TEGRA_DAS_DAP_CTRL_SEL_COUNT; i++) {
|
|
addr = TEGRA_DAS_DAP_CTRL_SEL +
|
|
(i * TEGRA_DAS_DAP_CTRL_SEL_STRIDE);
|
|
reg = tegra_das_read(addr);
|
|
seq_printf(s, "TEGRA_DAS_DAP_CTRL_SEL[%d] = %08x\n", i, reg);
|
|
}
|
|
|
|
for (i = 0; i < TEGRA_DAS_DAC_INPUT_DATA_CLK_SEL_COUNT; i++) {
|
|
addr = TEGRA_DAS_DAC_INPUT_DATA_CLK_SEL +
|
|
(i * TEGRA_DAS_DAC_INPUT_DATA_CLK_SEL_STRIDE);
|
|
reg = tegra_das_read(addr);
|
|
seq_printf(s, "TEGRA_DAS_DAC_INPUT_DATA_CLK_SEL[%d] = %08x\n",
|
|
i, reg);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int tegra_das_debug_open(struct inode *inode, struct file *file)
|
|
{
|
|
return single_open(file, tegra_das_show, inode->i_private);
|
|
}
|
|
|
|
static const struct file_operations tegra_das_debug_fops = {
|
|
.open = tegra_das_debug_open,
|
|
.read = seq_read,
|
|
.llseek = seq_lseek,
|
|
.release = single_release,
|
|
};
|
|
|
|
static void tegra_das_debug_add(struct tegra_das *das)
|
|
{
|
|
das->debug = debugfs_create_file(DRV_NAME, S_IRUGO,
|
|
snd_soc_debugfs_root, das,
|
|
&tegra_das_debug_fops);
|
|
}
|
|
|
|
static void tegra_das_debug_remove(struct tegra_das *das)
|
|
{
|
|
if (das->debug)
|
|
debugfs_remove(das->debug);
|
|
}
|
|
#else
|
|
static inline void tegra_das_debug_add(struct tegra_das *das)
|
|
{
|
|
}
|
|
|
|
static inline void tegra_das_debug_remove(struct tegra_das *das)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
static int __devinit tegra_das_probe(struct platform_device *pdev)
|
|
{
|
|
struct resource *res, *region;
|
|
int ret = 0;
|
|
|
|
if (das)
|
|
return -ENODEV;
|
|
|
|
das = kzalloc(sizeof(struct tegra_das), GFP_KERNEL);
|
|
if (!das) {
|
|
dev_err(&pdev->dev, "Can't allocate tegra_das\n");
|
|
ret = -ENOMEM;
|
|
goto exit;
|
|
}
|
|
das->dev = &pdev->dev;
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
if (!res) {
|
|
dev_err(&pdev->dev, "No memory resource\n");
|
|
ret = -ENODEV;
|
|
goto err_free;
|
|
}
|
|
|
|
region = request_mem_region(res->start, resource_size(res),
|
|
pdev->name);
|
|
if (!region) {
|
|
dev_err(&pdev->dev, "Memory region already claimed\n");
|
|
ret = -EBUSY;
|
|
goto err_free;
|
|
}
|
|
|
|
das->regs = ioremap(res->start, resource_size(res));
|
|
if (!das->regs) {
|
|
dev_err(&pdev->dev, "ioremap failed\n");
|
|
ret = -ENOMEM;
|
|
goto err_release;
|
|
}
|
|
|
|
tegra_das_debug_add(das);
|
|
|
|
platform_set_drvdata(pdev, das);
|
|
|
|
return 0;
|
|
|
|
err_release:
|
|
release_mem_region(res->start, resource_size(res));
|
|
err_free:
|
|
kfree(das);
|
|
das = NULL;
|
|
exit:
|
|
return ret;
|
|
}
|
|
|
|
static int __devexit tegra_das_remove(struct platform_device *pdev)
|
|
{
|
|
struct resource *res;
|
|
|
|
if (!das)
|
|
return -ENODEV;
|
|
|
|
platform_set_drvdata(pdev, NULL);
|
|
|
|
tegra_das_debug_remove(das);
|
|
|
|
iounmap(das->regs);
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
release_mem_region(res->start, resource_size(res));
|
|
|
|
kfree(das);
|
|
das = NULL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver tegra_das_driver = {
|
|
.probe = tegra_das_probe,
|
|
.remove = __devexit_p(tegra_das_remove),
|
|
.driver = {
|
|
.name = DRV_NAME,
|
|
},
|
|
};
|
|
|
|
static int __init tegra_das_modinit(void)
|
|
{
|
|
return platform_driver_register(&tegra_das_driver);
|
|
}
|
|
module_init(tegra_das_modinit);
|
|
|
|
static void __exit tegra_das_modexit(void)
|
|
{
|
|
platform_driver_unregister(&tegra_das_driver);
|
|
}
|
|
module_exit(tegra_das_modexit);
|
|
|
|
MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>");
|
|
MODULE_DESCRIPTION("Tegra DAS driver");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS("platform:" DRV_NAME);
|