mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-29 14:05:19 +08:00
5289795824
[ Upstream commit311242c770] It will cause null-ptr-deref when using 'res', if platform_get_resource() returns NULL, so move using 'res' after devm_ioremap_resource() that will check it to avoid null-ptr-deref. And use devm_platform_get_and_ioremap_resource() to simplify code. Fixes:b5e29aa880("mfd: davinci_voicecodec: Remove pointless #include") Signed-off-by: Yang Yingliang <yangyingliang@huawei.com> Signed-off-by: Lee Jones <lee.jones@linaro.org> Link: https://lore.kernel.org/r/20220426030857.3539336-1-yangyingliang@huawei.com Signed-off-by: Sasha Levin <sashal@kernel.org>
137 lines
3.2 KiB
C
137 lines
3.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* DaVinci Voice Codec Core Interface for TI platforms
|
|
*
|
|
* Copyright (C) 2010 Texas Instruments, Inc
|
|
*
|
|
* Author: Miguel Aguilar <miguel.aguilar@ridgerun.com>
|
|
*/
|
|
|
|
#include <linux/init.h>
|
|
#include <linux/module.h>
|
|
#include <linux/device.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/io.h>
|
|
#include <linux/clk.h>
|
|
#include <linux/regmap.h>
|
|
|
|
#include <sound/pcm.h>
|
|
|
|
#include <linux/mfd/davinci_voicecodec.h>
|
|
|
|
static const struct regmap_config davinci_vc_regmap = {
|
|
.reg_bits = 32,
|
|
.val_bits = 32,
|
|
};
|
|
|
|
static int __init davinci_vc_probe(struct platform_device *pdev)
|
|
{
|
|
struct davinci_vc *davinci_vc;
|
|
struct resource *res;
|
|
struct mfd_cell *cell = NULL;
|
|
dma_addr_t fifo_base;
|
|
int ret;
|
|
|
|
davinci_vc = devm_kzalloc(&pdev->dev,
|
|
sizeof(struct davinci_vc), GFP_KERNEL);
|
|
if (!davinci_vc)
|
|
return -ENOMEM;
|
|
|
|
davinci_vc->clk = devm_clk_get(&pdev->dev, NULL);
|
|
if (IS_ERR(davinci_vc->clk)) {
|
|
dev_dbg(&pdev->dev,
|
|
"could not get the clock for voice codec\n");
|
|
return -ENODEV;
|
|
}
|
|
clk_enable(davinci_vc->clk);
|
|
|
|
davinci_vc->base = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
|
|
if (IS_ERR(davinci_vc->base)) {
|
|
ret = PTR_ERR(davinci_vc->base);
|
|
goto fail;
|
|
}
|
|
fifo_base = (dma_addr_t)res->start;
|
|
|
|
davinci_vc->regmap = devm_regmap_init_mmio(&pdev->dev,
|
|
davinci_vc->base,
|
|
&davinci_vc_regmap);
|
|
if (IS_ERR(davinci_vc->regmap)) {
|
|
ret = PTR_ERR(davinci_vc->regmap);
|
|
goto fail;
|
|
}
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
|
|
if (!res) {
|
|
dev_err(&pdev->dev, "no DMA resource\n");
|
|
ret = -ENXIO;
|
|
goto fail;
|
|
}
|
|
|
|
davinci_vc->davinci_vcif.dma_tx_channel = res->start;
|
|
davinci_vc->davinci_vcif.dma_tx_addr = fifo_base + DAVINCI_VC_WFIFO;
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
|
|
if (!res) {
|
|
dev_err(&pdev->dev, "no DMA resource\n");
|
|
ret = -ENXIO;
|
|
goto fail;
|
|
}
|
|
|
|
davinci_vc->davinci_vcif.dma_rx_channel = res->start;
|
|
davinci_vc->davinci_vcif.dma_rx_addr = fifo_base + DAVINCI_VC_RFIFO;
|
|
|
|
davinci_vc->dev = &pdev->dev;
|
|
davinci_vc->pdev = pdev;
|
|
|
|
/* Voice codec interface client */
|
|
cell = &davinci_vc->cells[DAVINCI_VC_VCIF_CELL];
|
|
cell->name = "davinci-vcif";
|
|
cell->platform_data = davinci_vc;
|
|
cell->pdata_size = sizeof(*davinci_vc);
|
|
|
|
/* Voice codec CQ93VC client */
|
|
cell = &davinci_vc->cells[DAVINCI_VC_CQ93VC_CELL];
|
|
cell->name = "cq93vc-codec";
|
|
cell->platform_data = davinci_vc;
|
|
cell->pdata_size = sizeof(*davinci_vc);
|
|
|
|
ret = mfd_add_devices(&pdev->dev, pdev->id, davinci_vc->cells,
|
|
DAVINCI_VC_CELLS, NULL, 0, NULL);
|
|
if (ret != 0) {
|
|
dev_err(&pdev->dev, "fail to register client devices\n");
|
|
goto fail;
|
|
}
|
|
|
|
return 0;
|
|
|
|
fail:
|
|
clk_disable(davinci_vc->clk);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int davinci_vc_remove(struct platform_device *pdev)
|
|
{
|
|
struct davinci_vc *davinci_vc = platform_get_drvdata(pdev);
|
|
|
|
mfd_remove_devices(&pdev->dev);
|
|
|
|
clk_disable(davinci_vc->clk);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver davinci_vc_driver = {
|
|
.driver = {
|
|
.name = "davinci_voicecodec",
|
|
},
|
|
.remove = davinci_vc_remove,
|
|
};
|
|
|
|
module_platform_driver_probe(davinci_vc_driver, davinci_vc_probe);
|
|
|
|
MODULE_AUTHOR("Miguel Aguilar");
|
|
MODULE_DESCRIPTION("Texas Instruments DaVinci Voice Codec Core Interface");
|
|
MODULE_LICENSE("GPL");
|