18c2ecf20Sopenharmony_ci// SPDX-License-Identifier: GPL-2.0-or-later
28c2ecf20Sopenharmony_ci/*
38c2ecf20Sopenharmony_ci * DaVinci Voice Codec Core Interface for TI platforms
48c2ecf20Sopenharmony_ci *
58c2ecf20Sopenharmony_ci * Copyright (C) 2010 Texas Instruments, Inc
68c2ecf20Sopenharmony_ci *
78c2ecf20Sopenharmony_ci * Author: Miguel Aguilar <miguel.aguilar@ridgerun.com>
88c2ecf20Sopenharmony_ci */
98c2ecf20Sopenharmony_ci
108c2ecf20Sopenharmony_ci#include <linux/init.h>
118c2ecf20Sopenharmony_ci#include <linux/module.h>
128c2ecf20Sopenharmony_ci#include <linux/device.h>
138c2ecf20Sopenharmony_ci#include <linux/slab.h>
148c2ecf20Sopenharmony_ci#include <linux/delay.h>
158c2ecf20Sopenharmony_ci#include <linux/io.h>
168c2ecf20Sopenharmony_ci#include <linux/clk.h>
178c2ecf20Sopenharmony_ci#include <linux/regmap.h>
188c2ecf20Sopenharmony_ci
198c2ecf20Sopenharmony_ci#include <sound/pcm.h>
208c2ecf20Sopenharmony_ci
218c2ecf20Sopenharmony_ci#include <linux/mfd/davinci_voicecodec.h>
228c2ecf20Sopenharmony_ci
238c2ecf20Sopenharmony_cistatic const struct regmap_config davinci_vc_regmap = {
248c2ecf20Sopenharmony_ci	.reg_bits = 32,
258c2ecf20Sopenharmony_ci	.val_bits = 32,
268c2ecf20Sopenharmony_ci};
278c2ecf20Sopenharmony_ci
288c2ecf20Sopenharmony_cistatic int __init davinci_vc_probe(struct platform_device *pdev)
298c2ecf20Sopenharmony_ci{
308c2ecf20Sopenharmony_ci	struct davinci_vc *davinci_vc;
318c2ecf20Sopenharmony_ci	struct resource *res;
328c2ecf20Sopenharmony_ci	struct mfd_cell *cell = NULL;
338c2ecf20Sopenharmony_ci	dma_addr_t fifo_base;
348c2ecf20Sopenharmony_ci	int ret;
358c2ecf20Sopenharmony_ci
368c2ecf20Sopenharmony_ci	davinci_vc = devm_kzalloc(&pdev->dev,
378c2ecf20Sopenharmony_ci				  sizeof(struct davinci_vc), GFP_KERNEL);
388c2ecf20Sopenharmony_ci	if (!davinci_vc)
398c2ecf20Sopenharmony_ci		return -ENOMEM;
408c2ecf20Sopenharmony_ci
418c2ecf20Sopenharmony_ci	davinci_vc->clk = devm_clk_get(&pdev->dev, NULL);
428c2ecf20Sopenharmony_ci	if (IS_ERR(davinci_vc->clk)) {
438c2ecf20Sopenharmony_ci		dev_dbg(&pdev->dev,
448c2ecf20Sopenharmony_ci			    "could not get the clock for voice codec\n");
458c2ecf20Sopenharmony_ci		return -ENODEV;
468c2ecf20Sopenharmony_ci	}
478c2ecf20Sopenharmony_ci	clk_enable(davinci_vc->clk);
488c2ecf20Sopenharmony_ci
498c2ecf20Sopenharmony_ci	davinci_vc->base = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
508c2ecf20Sopenharmony_ci	if (IS_ERR(davinci_vc->base)) {
518c2ecf20Sopenharmony_ci		ret = PTR_ERR(davinci_vc->base);
528c2ecf20Sopenharmony_ci		goto fail;
538c2ecf20Sopenharmony_ci	}
548c2ecf20Sopenharmony_ci	fifo_base = (dma_addr_t)res->start;
558c2ecf20Sopenharmony_ci
568c2ecf20Sopenharmony_ci	davinci_vc->regmap = devm_regmap_init_mmio(&pdev->dev,
578c2ecf20Sopenharmony_ci						   davinci_vc->base,
588c2ecf20Sopenharmony_ci						   &davinci_vc_regmap);
598c2ecf20Sopenharmony_ci	if (IS_ERR(davinci_vc->regmap)) {
608c2ecf20Sopenharmony_ci		ret = PTR_ERR(davinci_vc->regmap);
618c2ecf20Sopenharmony_ci		goto fail;
628c2ecf20Sopenharmony_ci	}
638c2ecf20Sopenharmony_ci
648c2ecf20Sopenharmony_ci	res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
658c2ecf20Sopenharmony_ci	if (!res) {
668c2ecf20Sopenharmony_ci		dev_err(&pdev->dev, "no DMA resource\n");
678c2ecf20Sopenharmony_ci		ret = -ENXIO;
688c2ecf20Sopenharmony_ci		goto fail;
698c2ecf20Sopenharmony_ci	}
708c2ecf20Sopenharmony_ci
718c2ecf20Sopenharmony_ci	davinci_vc->davinci_vcif.dma_tx_channel = res->start;
728c2ecf20Sopenharmony_ci	davinci_vc->davinci_vcif.dma_tx_addr = fifo_base + DAVINCI_VC_WFIFO;
738c2ecf20Sopenharmony_ci
748c2ecf20Sopenharmony_ci	res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
758c2ecf20Sopenharmony_ci	if (!res) {
768c2ecf20Sopenharmony_ci		dev_err(&pdev->dev, "no DMA resource\n");
778c2ecf20Sopenharmony_ci		ret = -ENXIO;
788c2ecf20Sopenharmony_ci		goto fail;
798c2ecf20Sopenharmony_ci	}
808c2ecf20Sopenharmony_ci
818c2ecf20Sopenharmony_ci	davinci_vc->davinci_vcif.dma_rx_channel = res->start;
828c2ecf20Sopenharmony_ci	davinci_vc->davinci_vcif.dma_rx_addr = fifo_base + DAVINCI_VC_RFIFO;
838c2ecf20Sopenharmony_ci
848c2ecf20Sopenharmony_ci	davinci_vc->dev = &pdev->dev;
858c2ecf20Sopenharmony_ci	davinci_vc->pdev = pdev;
868c2ecf20Sopenharmony_ci
878c2ecf20Sopenharmony_ci	/* Voice codec interface client */
888c2ecf20Sopenharmony_ci	cell = &davinci_vc->cells[DAVINCI_VC_VCIF_CELL];
898c2ecf20Sopenharmony_ci	cell->name = "davinci-vcif";
908c2ecf20Sopenharmony_ci	cell->platform_data = davinci_vc;
918c2ecf20Sopenharmony_ci	cell->pdata_size = sizeof(*davinci_vc);
928c2ecf20Sopenharmony_ci
938c2ecf20Sopenharmony_ci	/* Voice codec CQ93VC client */
948c2ecf20Sopenharmony_ci	cell = &davinci_vc->cells[DAVINCI_VC_CQ93VC_CELL];
958c2ecf20Sopenharmony_ci	cell->name = "cq93vc-codec";
968c2ecf20Sopenharmony_ci	cell->platform_data = davinci_vc;
978c2ecf20Sopenharmony_ci	cell->pdata_size = sizeof(*davinci_vc);
988c2ecf20Sopenharmony_ci
998c2ecf20Sopenharmony_ci	ret = mfd_add_devices(&pdev->dev, pdev->id, davinci_vc->cells,
1008c2ecf20Sopenharmony_ci			      DAVINCI_VC_CELLS, NULL, 0, NULL);
1018c2ecf20Sopenharmony_ci	if (ret != 0) {
1028c2ecf20Sopenharmony_ci		dev_err(&pdev->dev, "fail to register client devices\n");
1038c2ecf20Sopenharmony_ci		goto fail;
1048c2ecf20Sopenharmony_ci	}
1058c2ecf20Sopenharmony_ci
1068c2ecf20Sopenharmony_ci	return 0;
1078c2ecf20Sopenharmony_ci
1088c2ecf20Sopenharmony_cifail:
1098c2ecf20Sopenharmony_ci	clk_disable(davinci_vc->clk);
1108c2ecf20Sopenharmony_ci
1118c2ecf20Sopenharmony_ci	return ret;
1128c2ecf20Sopenharmony_ci}
1138c2ecf20Sopenharmony_ci
1148c2ecf20Sopenharmony_cistatic int davinci_vc_remove(struct platform_device *pdev)
1158c2ecf20Sopenharmony_ci{
1168c2ecf20Sopenharmony_ci	struct davinci_vc *davinci_vc = platform_get_drvdata(pdev);
1178c2ecf20Sopenharmony_ci
1188c2ecf20Sopenharmony_ci	mfd_remove_devices(&pdev->dev);
1198c2ecf20Sopenharmony_ci
1208c2ecf20Sopenharmony_ci	clk_disable(davinci_vc->clk);
1218c2ecf20Sopenharmony_ci
1228c2ecf20Sopenharmony_ci	return 0;
1238c2ecf20Sopenharmony_ci}
1248c2ecf20Sopenharmony_ci
1258c2ecf20Sopenharmony_cistatic struct platform_driver davinci_vc_driver = {
1268c2ecf20Sopenharmony_ci	.driver	= {
1278c2ecf20Sopenharmony_ci		.name = "davinci_voicecodec",
1288c2ecf20Sopenharmony_ci	},
1298c2ecf20Sopenharmony_ci	.remove	= davinci_vc_remove,
1308c2ecf20Sopenharmony_ci};
1318c2ecf20Sopenharmony_ci
1328c2ecf20Sopenharmony_cimodule_platform_driver_probe(davinci_vc_driver, davinci_vc_probe);
1338c2ecf20Sopenharmony_ci
1348c2ecf20Sopenharmony_ciMODULE_AUTHOR("Miguel Aguilar");
1358c2ecf20Sopenharmony_ciMODULE_DESCRIPTION("Texas Instruments DaVinci Voice Codec Core Interface");
1368c2ecf20Sopenharmony_ciMODULE_LICENSE("GPL");
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