153 lines
3.9 KiB
C
153 lines
3.9 KiB
C
/*
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* DaVinci Voice Codec Core Interface for TI platforms
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*
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* Copyright (C) 2010 Texas Instruments, Inc
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*
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* Author: Miguel Aguilar <miguel.aguilar@ridgerun.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/device.h>
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#include <linux/slab.h>
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#include <linux/delay.h>
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#include <linux/io.h>
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#include <linux/clk.h>
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#include <linux/regmap.h>
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#include <sound/pcm.h>
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#include <linux/mfd/davinci_voicecodec.h>
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#include <mach/hardware.h>
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static const struct regmap_config davinci_vc_regmap = {
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.reg_bits = 32,
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.val_bits = 32,
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};
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static int __init davinci_vc_probe(struct platform_device *pdev)
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{
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struct davinci_vc *davinci_vc;
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struct resource *res;
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struct mfd_cell *cell = NULL;
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int ret;
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davinci_vc = devm_kzalloc(&pdev->dev,
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sizeof(struct davinci_vc), GFP_KERNEL);
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if (!davinci_vc)
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return -ENOMEM;
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davinci_vc->clk = devm_clk_get(&pdev->dev, NULL);
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if (IS_ERR(davinci_vc->clk)) {
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dev_dbg(&pdev->dev,
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"could not get the clock for voice codec\n");
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return -ENODEV;
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}
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clk_enable(davinci_vc->clk);
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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davinci_vc->base = devm_ioremap_resource(&pdev->dev, res);
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if (IS_ERR(davinci_vc->base)) {
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ret = PTR_ERR(davinci_vc->base);
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goto fail;
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}
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davinci_vc->regmap = devm_regmap_init_mmio(&pdev->dev,
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davinci_vc->base,
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&davinci_vc_regmap);
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if (IS_ERR(davinci_vc->regmap)) {
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ret = PTR_ERR(davinci_vc->regmap);
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goto fail;
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}
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res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
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if (!res) {
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dev_err(&pdev->dev, "no DMA resource\n");
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ret = -ENXIO;
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goto fail;
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}
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davinci_vc->davinci_vcif.dma_tx_channel = res->start;
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davinci_vc->davinci_vcif.dma_tx_addr =
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(dma_addr_t)(io_v2p(davinci_vc->base) + DAVINCI_VC_WFIFO);
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res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
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if (!res) {
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dev_err(&pdev->dev, "no DMA resource\n");
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ret = -ENXIO;
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goto fail;
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}
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davinci_vc->davinci_vcif.dma_rx_channel = res->start;
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davinci_vc->davinci_vcif.dma_rx_addr =
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(dma_addr_t)(io_v2p(davinci_vc->base) + DAVINCI_VC_RFIFO);
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davinci_vc->dev = &pdev->dev;
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davinci_vc->pdev = pdev;
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/* Voice codec interface client */
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cell = &davinci_vc->cells[DAVINCI_VC_VCIF_CELL];
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cell->name = "davinci-vcif";
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cell->platform_data = davinci_vc;
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cell->pdata_size = sizeof(*davinci_vc);
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/* Voice codec CQ93VC client */
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cell = &davinci_vc->cells[DAVINCI_VC_CQ93VC_CELL];
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cell->name = "cq93vc-codec";
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cell->platform_data = davinci_vc;
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cell->pdata_size = sizeof(*davinci_vc);
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ret = mfd_add_devices(&pdev->dev, pdev->id, davinci_vc->cells,
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DAVINCI_VC_CELLS, NULL, 0, NULL);
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if (ret != 0) {
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dev_err(&pdev->dev, "fail to register client devices\n");
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goto fail;
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}
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return 0;
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fail:
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clk_disable(davinci_vc->clk);
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return ret;
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}
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static int davinci_vc_remove(struct platform_device *pdev)
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{
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struct davinci_vc *davinci_vc = platform_get_drvdata(pdev);
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mfd_remove_devices(&pdev->dev);
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clk_disable(davinci_vc->clk);
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return 0;
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}
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static struct platform_driver davinci_vc_driver = {
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.driver = {
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.name = "davinci_voicecodec",
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},
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.remove = davinci_vc_remove,
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};
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module_platform_driver_probe(davinci_vc_driver, davinci_vc_probe);
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MODULE_AUTHOR("Miguel Aguilar");
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MODULE_DESCRIPTION("Texas Instruments DaVinci Voice Codec Core Interface");
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MODULE_LICENSE("GPL");
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