1// SPDX-License-Identifier: GPL-2.0-or-later
  2/*
  3 * DaVinci Voice Codec Core Interface for TI platforms
  4 *
  5 * Copyright (C) 2010 Texas Instruments, Inc
  6 *
  7 * Author: Miguel Aguilar <miguel.aguilar@ridgerun.com>
  8 */
  9
 10#include <linux/init.h>
 11#include <linux/module.h>
 12#include <linux/device.h>
 13#include <linux/slab.h>
 14#include <linux/delay.h>
 15#include <linux/io.h>
 16#include <linux/clk.h>
 17#include <linux/regmap.h>
 18
 19#include <sound/pcm.h>
 20
 21#include <linux/mfd/davinci_voicecodec.h>
 22
 23static const struct regmap_config davinci_vc_regmap = {
 24	.reg_bits = 32,
 25	.val_bits = 32,
 26};
 27
 28static int __init davinci_vc_probe(struct platform_device *pdev)
 29{
 30	struct davinci_vc *davinci_vc;
 31	struct resource *res;
 32	struct mfd_cell *cell = NULL;
 33	dma_addr_t fifo_base;
 34	int ret;
 35
 36	davinci_vc = devm_kzalloc(&pdev->dev,
 37				  sizeof(struct davinci_vc), GFP_KERNEL);
 38	if (!davinci_vc)
 39		return -ENOMEM;
 40
 41	davinci_vc->clk = devm_clk_get(&pdev->dev, NULL);
 42	if (IS_ERR(davinci_vc->clk)) {
 43		dev_dbg(&pdev->dev,
 44			    "could not get the clock for voice codec\n");
 45		return -ENODEV;
 46	}
 47	clk_enable(davinci_vc->clk);
 48
 49	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 50
 51	fifo_base = (dma_addr_t)res->start;
 52	davinci_vc->base = devm_ioremap_resource(&pdev->dev, res);
 53	if (IS_ERR(davinci_vc->base)) {
 54		ret = PTR_ERR(davinci_vc->base);
 55		goto fail;
 56	}
 57
 58	davinci_vc->regmap = devm_regmap_init_mmio(&pdev->dev,
 59						   davinci_vc->base,
 60						   &davinci_vc_regmap);
 61	if (IS_ERR(davinci_vc->regmap)) {
 62		ret = PTR_ERR(davinci_vc->regmap);
 63		goto fail;
 64	}
 65
 66	res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
 67	if (!res) {
 68		dev_err(&pdev->dev, "no DMA resource\n");
 69		ret = -ENXIO;
 70		goto fail;
 71	}
 72
 73	davinci_vc->davinci_vcif.dma_tx_channel = res->start;
 74	davinci_vc->davinci_vcif.dma_tx_addr = fifo_base + DAVINCI_VC_WFIFO;
 75
 76	res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
 77	if (!res) {
 78		dev_err(&pdev->dev, "no DMA resource\n");
 79		ret = -ENXIO;
 80		goto fail;
 81	}
 82
 83	davinci_vc->davinci_vcif.dma_rx_channel = res->start;
 84	davinci_vc->davinci_vcif.dma_rx_addr = fifo_base + DAVINCI_VC_RFIFO;
 85
 86	davinci_vc->dev = &pdev->dev;
 87	davinci_vc->pdev = pdev;
 88
 89	/* Voice codec interface client */
 90	cell = &davinci_vc->cells[DAVINCI_VC_VCIF_CELL];
 91	cell->name = "davinci-vcif";
 92	cell->platform_data = davinci_vc;
 93	cell->pdata_size = sizeof(*davinci_vc);
 94
 95	/* Voice codec CQ93VC client */
 96	cell = &davinci_vc->cells[DAVINCI_VC_CQ93VC_CELL];
 97	cell->name = "cq93vc-codec";
 98	cell->platform_data = davinci_vc;
 99	cell->pdata_size = sizeof(*davinci_vc);
100
101	ret = mfd_add_devices(&pdev->dev, pdev->id, davinci_vc->cells,
102			      DAVINCI_VC_CELLS, NULL, 0, NULL);
103	if (ret != 0) {
104		dev_err(&pdev->dev, "fail to register client devices\n");
105		goto fail;
106	}
107
108	return 0;
109
110fail:
111	clk_disable(davinci_vc->clk);
112
113	return ret;
114}
115
116static int davinci_vc_remove(struct platform_device *pdev)
117{
118	struct davinci_vc *davinci_vc = platform_get_drvdata(pdev);
119
120	mfd_remove_devices(&pdev->dev);
121
122	clk_disable(davinci_vc->clk);
123
124	return 0;
125}
126
127static struct platform_driver davinci_vc_driver = {
128	.driver	= {
129		.name = "davinci_voicecodec",
130	},
131	.remove	= davinci_vc_remove,
132};
133
134module_platform_driver_probe(davinci_vc_driver, davinci_vc_probe);
135
136MODULE_AUTHOR("Miguel Aguilar");
137MODULE_DESCRIPTION("Texas Instruments DaVinci Voice Codec Core Interface");
138MODULE_LICENSE("GPL");