2 * DaVinci Voice Codec Core Interface for TI platforms
4 * Copyright (C) 2010 Texas Instruments, Inc
6 * Author: Miguel Aguilar <miguel.aguilar@ridgerun.com>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 #include <linux/init.h>
24 #include <linux/module.h>
25 #include <linux/device.h>
26 #include <linux/slab.h>
27 #include <linux/delay.h>
29 #include <linux/clk.h>
31 #include <sound/pcm.h>
33 #include <linux/mfd/davinci_voicecodec.h>
35 u32 davinci_vc_read(struct davinci_vc *davinci_vc, int reg)
37 return __raw_readl(davinci_vc->base + reg);
40 void davinci_vc_write(struct davinci_vc *davinci_vc,
43 __raw_writel(val, davinci_vc->base + reg);
46 static int __init davinci_vc_probe(struct platform_device *pdev)
48 struct davinci_vc *davinci_vc;
50 struct mfd_cell *cell = NULL;
53 davinci_vc = devm_kzalloc(&pdev->dev,
54 sizeof(struct davinci_vc), GFP_KERNEL);
57 "could not allocate memory for private data\n");
61 davinci_vc->clk = devm_clk_get(&pdev->dev, NULL);
62 if (IS_ERR(davinci_vc->clk)) {
64 "could not get the clock for voice codec\n");
67 clk_enable(davinci_vc->clk);
69 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
71 davinci_vc->base = devm_ioremap_resource(&pdev->dev, res);
72 if (IS_ERR(davinci_vc->base)) {
73 ret = PTR_ERR(davinci_vc->base);
77 res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
79 dev_err(&pdev->dev, "no DMA resource\n");
84 davinci_vc->davinci_vcif.dma_tx_channel = res->start;
85 davinci_vc->davinci_vcif.dma_tx_addr =
86 (dma_addr_t)(io_v2p(davinci_vc->base) + DAVINCI_VC_WFIFO);
88 res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
90 dev_err(&pdev->dev, "no DMA resource\n");
95 davinci_vc->davinci_vcif.dma_rx_channel = res->start;
96 davinci_vc->davinci_vcif.dma_rx_addr =
97 (dma_addr_t)(io_v2p(davinci_vc->base) + DAVINCI_VC_RFIFO);
99 davinci_vc->dev = &pdev->dev;
100 davinci_vc->pdev = pdev;
102 /* Voice codec interface client */
103 cell = &davinci_vc->cells[DAVINCI_VC_VCIF_CELL];
104 cell->name = "davinci-vcif";
105 cell->platform_data = davinci_vc;
106 cell->pdata_size = sizeof(*davinci_vc);
108 /* Voice codec CQ93VC client */
109 cell = &davinci_vc->cells[DAVINCI_VC_CQ93VC_CELL];
110 cell->name = "cq93vc-codec";
111 cell->platform_data = davinci_vc;
112 cell->pdata_size = sizeof(*davinci_vc);
114 ret = mfd_add_devices(&pdev->dev, pdev->id, davinci_vc->cells,
115 DAVINCI_VC_CELLS, NULL, 0, NULL);
117 dev_err(&pdev->dev, "fail to register client devices\n");
124 clk_disable(davinci_vc->clk);
129 static int davinci_vc_remove(struct platform_device *pdev)
131 struct davinci_vc *davinci_vc = platform_get_drvdata(pdev);
133 mfd_remove_devices(&pdev->dev);
135 clk_disable(davinci_vc->clk);
140 static struct platform_driver davinci_vc_driver = {
142 .name = "davinci_voicecodec",
143 .owner = THIS_MODULE,
145 .remove = davinci_vc_remove,
148 module_platform_driver_probe(davinci_vc_driver, davinci_vc_probe);
150 MODULE_AUTHOR("Miguel Aguilar");
151 MODULE_DESCRIPTION("Texas Instruments DaVinci Voice Codec Core Interface");
152 MODULE_LICENSE("GPL");