1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-or-later
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * DaVinci Voice Codec Core Interface for TI platforms
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Copyright (C) 2010 Texas Instruments, Inc
6*4882a593Smuzhiyun *
7*4882a593Smuzhiyun * Author: Miguel Aguilar <miguel.aguilar@ridgerun.com>
8*4882a593Smuzhiyun */
9*4882a593Smuzhiyun
10*4882a593Smuzhiyun #include <linux/init.h>
11*4882a593Smuzhiyun #include <linux/module.h>
12*4882a593Smuzhiyun #include <linux/device.h>
13*4882a593Smuzhiyun #include <linux/slab.h>
14*4882a593Smuzhiyun #include <linux/delay.h>
15*4882a593Smuzhiyun #include <linux/io.h>
16*4882a593Smuzhiyun #include <linux/clk.h>
17*4882a593Smuzhiyun #include <linux/regmap.h>
18*4882a593Smuzhiyun
19*4882a593Smuzhiyun #include <sound/pcm.h>
20*4882a593Smuzhiyun
21*4882a593Smuzhiyun #include <linux/mfd/davinci_voicecodec.h>
22*4882a593Smuzhiyun
23*4882a593Smuzhiyun static const struct regmap_config davinci_vc_regmap = {
24*4882a593Smuzhiyun .reg_bits = 32,
25*4882a593Smuzhiyun .val_bits = 32,
26*4882a593Smuzhiyun };
27*4882a593Smuzhiyun
davinci_vc_probe(struct platform_device * pdev)28*4882a593Smuzhiyun static int __init davinci_vc_probe(struct platform_device *pdev)
29*4882a593Smuzhiyun {
30*4882a593Smuzhiyun struct davinci_vc *davinci_vc;
31*4882a593Smuzhiyun struct resource *res;
32*4882a593Smuzhiyun struct mfd_cell *cell = NULL;
33*4882a593Smuzhiyun dma_addr_t fifo_base;
34*4882a593Smuzhiyun int ret;
35*4882a593Smuzhiyun
36*4882a593Smuzhiyun davinci_vc = devm_kzalloc(&pdev->dev,
37*4882a593Smuzhiyun sizeof(struct davinci_vc), GFP_KERNEL);
38*4882a593Smuzhiyun if (!davinci_vc)
39*4882a593Smuzhiyun return -ENOMEM;
40*4882a593Smuzhiyun
41*4882a593Smuzhiyun davinci_vc->clk = devm_clk_get(&pdev->dev, NULL);
42*4882a593Smuzhiyun if (IS_ERR(davinci_vc->clk)) {
43*4882a593Smuzhiyun dev_dbg(&pdev->dev,
44*4882a593Smuzhiyun "could not get the clock for voice codec\n");
45*4882a593Smuzhiyun return -ENODEV;
46*4882a593Smuzhiyun }
47*4882a593Smuzhiyun clk_enable(davinci_vc->clk);
48*4882a593Smuzhiyun
49*4882a593Smuzhiyun davinci_vc->base = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
50*4882a593Smuzhiyun if (IS_ERR(davinci_vc->base)) {
51*4882a593Smuzhiyun ret = PTR_ERR(davinci_vc->base);
52*4882a593Smuzhiyun goto fail;
53*4882a593Smuzhiyun }
54*4882a593Smuzhiyun fifo_base = (dma_addr_t)res->start;
55*4882a593Smuzhiyun
56*4882a593Smuzhiyun davinci_vc->regmap = devm_regmap_init_mmio(&pdev->dev,
57*4882a593Smuzhiyun davinci_vc->base,
58*4882a593Smuzhiyun &davinci_vc_regmap);
59*4882a593Smuzhiyun if (IS_ERR(davinci_vc->regmap)) {
60*4882a593Smuzhiyun ret = PTR_ERR(davinci_vc->regmap);
61*4882a593Smuzhiyun goto fail;
62*4882a593Smuzhiyun }
63*4882a593Smuzhiyun
64*4882a593Smuzhiyun res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
65*4882a593Smuzhiyun if (!res) {
66*4882a593Smuzhiyun dev_err(&pdev->dev, "no DMA resource\n");
67*4882a593Smuzhiyun ret = -ENXIO;
68*4882a593Smuzhiyun goto fail;
69*4882a593Smuzhiyun }
70*4882a593Smuzhiyun
71*4882a593Smuzhiyun davinci_vc->davinci_vcif.dma_tx_channel = res->start;
72*4882a593Smuzhiyun davinci_vc->davinci_vcif.dma_tx_addr = fifo_base + DAVINCI_VC_WFIFO;
73*4882a593Smuzhiyun
74*4882a593Smuzhiyun res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
75*4882a593Smuzhiyun if (!res) {
76*4882a593Smuzhiyun dev_err(&pdev->dev, "no DMA resource\n");
77*4882a593Smuzhiyun ret = -ENXIO;
78*4882a593Smuzhiyun goto fail;
79*4882a593Smuzhiyun }
80*4882a593Smuzhiyun
81*4882a593Smuzhiyun davinci_vc->davinci_vcif.dma_rx_channel = res->start;
82*4882a593Smuzhiyun davinci_vc->davinci_vcif.dma_rx_addr = fifo_base + DAVINCI_VC_RFIFO;
83*4882a593Smuzhiyun
84*4882a593Smuzhiyun davinci_vc->dev = &pdev->dev;
85*4882a593Smuzhiyun davinci_vc->pdev = pdev;
86*4882a593Smuzhiyun
87*4882a593Smuzhiyun /* Voice codec interface client */
88*4882a593Smuzhiyun cell = &davinci_vc->cells[DAVINCI_VC_VCIF_CELL];
89*4882a593Smuzhiyun cell->name = "davinci-vcif";
90*4882a593Smuzhiyun cell->platform_data = davinci_vc;
91*4882a593Smuzhiyun cell->pdata_size = sizeof(*davinci_vc);
92*4882a593Smuzhiyun
93*4882a593Smuzhiyun /* Voice codec CQ93VC client */
94*4882a593Smuzhiyun cell = &davinci_vc->cells[DAVINCI_VC_CQ93VC_CELL];
95*4882a593Smuzhiyun cell->name = "cq93vc-codec";
96*4882a593Smuzhiyun cell->platform_data = davinci_vc;
97*4882a593Smuzhiyun cell->pdata_size = sizeof(*davinci_vc);
98*4882a593Smuzhiyun
99*4882a593Smuzhiyun ret = mfd_add_devices(&pdev->dev, pdev->id, davinci_vc->cells,
100*4882a593Smuzhiyun DAVINCI_VC_CELLS, NULL, 0, NULL);
101*4882a593Smuzhiyun if (ret != 0) {
102*4882a593Smuzhiyun dev_err(&pdev->dev, "fail to register client devices\n");
103*4882a593Smuzhiyun goto fail;
104*4882a593Smuzhiyun }
105*4882a593Smuzhiyun
106*4882a593Smuzhiyun return 0;
107*4882a593Smuzhiyun
108*4882a593Smuzhiyun fail:
109*4882a593Smuzhiyun clk_disable(davinci_vc->clk);
110*4882a593Smuzhiyun
111*4882a593Smuzhiyun return ret;
112*4882a593Smuzhiyun }
113*4882a593Smuzhiyun
davinci_vc_remove(struct platform_device * pdev)114*4882a593Smuzhiyun static int davinci_vc_remove(struct platform_device *pdev)
115*4882a593Smuzhiyun {
116*4882a593Smuzhiyun struct davinci_vc *davinci_vc = platform_get_drvdata(pdev);
117*4882a593Smuzhiyun
118*4882a593Smuzhiyun mfd_remove_devices(&pdev->dev);
119*4882a593Smuzhiyun
120*4882a593Smuzhiyun clk_disable(davinci_vc->clk);
121*4882a593Smuzhiyun
122*4882a593Smuzhiyun return 0;
123*4882a593Smuzhiyun }
124*4882a593Smuzhiyun
125*4882a593Smuzhiyun static struct platform_driver davinci_vc_driver = {
126*4882a593Smuzhiyun .driver = {
127*4882a593Smuzhiyun .name = "davinci_voicecodec",
128*4882a593Smuzhiyun },
129*4882a593Smuzhiyun .remove = davinci_vc_remove,
130*4882a593Smuzhiyun };
131*4882a593Smuzhiyun
132*4882a593Smuzhiyun module_platform_driver_probe(davinci_vc_driver, davinci_vc_probe);
133*4882a593Smuzhiyun
134*4882a593Smuzhiyun MODULE_AUTHOR("Miguel Aguilar");
135*4882a593Smuzhiyun MODULE_DESCRIPTION("Texas Instruments DaVinci Voice Codec Core Interface");
136*4882a593Smuzhiyun MODULE_LICENSE("GPL");
137