Merge branch 'printk-rework' into for-linus
[linux-2.6-microblaze.git] / drivers / mfd / davinci_voicecodec.c
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
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         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
110 fail:
111         clk_disable(davinci_vc->clk);
112
113         return ret;
114 }
115
116 static 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
127 static struct platform_driver davinci_vc_driver = {
128         .driver = {
129                 .name = "davinci_voicecodec",
130         },
131         .remove = davinci_vc_remove,
132 };
133
134 module_platform_driver_probe(davinci_vc_driver, davinci_vc_probe);
135
136 MODULE_AUTHOR("Miguel Aguilar");
137 MODULE_DESCRIPTION("Texas Instruments DaVinci Voice Codec Core Interface");
138 MODULE_LICENSE("GPL");