davinci_voicecodec.c
3.24 KB
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// 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);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
fifo_base = (dma_addr_t)res->start;
davinci_vc->base = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(davinci_vc->base)) {
ret = PTR_ERR(davinci_vc->base);
goto fail;
}
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");