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
23 static const struct regmap_config davinci_vc_regmap = {
24 .reg_bits = 32,
25 .val_bits = 32,
26 };
27
davinci_vc_probe(struct platform_device * pdev)28 static 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 davinci_vc->base = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
50 if (IS_ERR(davinci_vc->base)) {
51 ret = PTR_ERR(davinci_vc->base);
52 goto fail;
53 }
54 fifo_base = (dma_addr_t)res->start;
55
56 davinci_vc->regmap = devm_regmap_init_mmio(&pdev->dev,
57 davinci_vc->base,
58 &davinci_vc_regmap);
59 if (IS_ERR(davinci_vc->regmap)) {
60 ret = PTR_ERR(davinci_vc->regmap);
61 goto fail;
62 }
63
64 res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
65 if (!res) {
66 dev_err(&pdev->dev, "no DMA resource\n");
67 ret = -ENXIO;
68 goto fail;
69 }
70
71 davinci_vc->davinci_vcif.dma_tx_channel = res->start;
72 davinci_vc->davinci_vcif.dma_tx_addr = fifo_base + DAVINCI_VC_WFIFO;
73
74 res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
75 if (!res) {
76 dev_err(&pdev->dev, "no DMA resource\n");
77 ret = -ENXIO;
78 goto fail;
79 }
80
81 davinci_vc->davinci_vcif.dma_rx_channel = res->start;
82 davinci_vc->davinci_vcif.dma_rx_addr = fifo_base + DAVINCI_VC_RFIFO;
83
84 davinci_vc->dev = &pdev->dev;
85 davinci_vc->pdev = pdev;
86
87 /* Voice codec interface client */
88 cell = &davinci_vc->cells[DAVINCI_VC_VCIF_CELL];
89 cell->name = "davinci-vcif";
90 cell->platform_data = davinci_vc;
91 cell->pdata_size = sizeof(*davinci_vc);
92
93 /* Voice codec CQ93VC client */
94 cell = &davinci_vc->cells[DAVINCI_VC_CQ93VC_CELL];
95 cell->name = "cq93vc-codec";
96 cell->platform_data = davinci_vc;
97 cell->pdata_size = sizeof(*davinci_vc);
98
99 ret = mfd_add_devices(&pdev->dev, pdev->id, davinci_vc->cells,
100 DAVINCI_VC_CELLS, NULL, 0, NULL);
101 if (ret != 0) {
102 dev_err(&pdev->dev, "fail to register client devices\n");
103 goto fail;
104 }
105
106 return 0;
107
108 fail:
109 clk_disable(davinci_vc->clk);
110
111 return ret;
112 }
113
davinci_vc_remove(struct platform_device * pdev)114 static int davinci_vc_remove(struct platform_device *pdev)
115 {
116 struct davinci_vc *davinci_vc = platform_get_drvdata(pdev);
117
118 mfd_remove_devices(&pdev->dev);
119
120 clk_disable(davinci_vc->clk);
121
122 return 0;
123 }
124
125 static struct platform_driver davinci_vc_driver = {
126 .driver = {
127 .name = "davinci_voicecodec",
128 },
129 .remove = davinci_vc_remove,
130 };
131
132 module_platform_driver_probe(davinci_vc_driver, davinci_vc_probe);
133
134 MODULE_AUTHOR("Miguel Aguilar");
135 MODULE_DESCRIPTION("Texas Instruments DaVinci Voice Codec Core Interface");
136 MODULE_LICENSE("GPL");
137