1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * DaVinci Voice Codec Core Interface for TI platforms
5 * Copyright (C) 2010 Texas Instruments, Inc
7 * Author: Miguel Aguilar <miguel.aguilar@ridgerun.com>
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>
16 #include <linux/clk.h>
17 #include <linux/regmap.h>
19 #include <sound/pcm.h>
21 #include <linux/mfd/davinci_voicecodec.h>
23 static const struct regmap_config davinci_vc_regmap = {
28 static int __init davinci_vc_probe(struct platform_device *pdev)
30 struct davinci_vc *davinci_vc;
32 struct mfd_cell *cell = NULL;
36 davinci_vc = devm_kzalloc(&pdev->dev,
37 sizeof(struct davinci_vc), GFP_KERNEL);
41 davinci_vc->clk = devm_clk_get(&pdev->dev, NULL);
42 if (IS_ERR(davinci_vc->clk)) {
44 "could not get the clock for voice codec\n");
47 clk_enable(davinci_vc->clk);
49 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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);
58 davinci_vc->regmap = devm_regmap_init_mmio(&pdev->dev,
61 if (IS_ERR(davinci_vc->regmap)) {
62 ret = PTR_ERR(davinci_vc->regmap);
66 res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
68 dev_err(&pdev->dev, "no DMA resource\n");
73 davinci_vc->davinci_vcif.dma_tx_channel = res->start;
74 davinci_vc->davinci_vcif.dma_tx_addr = fifo_base + DAVINCI_VC_WFIFO;
76 res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
78 dev_err(&pdev->dev, "no DMA resource\n");
83 davinci_vc->davinci_vcif.dma_rx_channel = res->start;
84 davinci_vc->davinci_vcif.dma_rx_addr = fifo_base + DAVINCI_VC_RFIFO;
86 davinci_vc->dev = &pdev->dev;
87 davinci_vc->pdev = pdev;
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);
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);
101 ret = mfd_add_devices(&pdev->dev, pdev->id, davinci_vc->cells,
102 DAVINCI_VC_CELLS, NULL, 0, NULL);
104 dev_err(&pdev->dev, "fail to register client devices\n");
111 clk_disable(davinci_vc->clk);
116 static int davinci_vc_remove(struct platform_device *pdev)
118 struct davinci_vc *davinci_vc = platform_get_drvdata(pdev);
120 mfd_remove_devices(&pdev->dev);
122 clk_disable(davinci_vc->clk);
127 static struct platform_driver davinci_vc_driver = {
129 .name = "davinci_voicecodec",
131 .remove = davinci_vc_remove,
134 module_platform_driver_probe(davinci_vc_driver, davinci_vc_probe);
136 MODULE_AUTHOR("Miguel Aguilar");
137 MODULE_DESCRIPTION("Texas Instruments DaVinci Voice Codec Core Interface");
138 MODULE_LICENSE("GPL");