Miguel Aguilar | ca26308 | 2010-03-11 09:32:21 -0600 | [diff] [blame] | 1 | /* |
| 2 | * DaVinci Voice Codec Core Interface for TI platforms |
| 3 | * |
| 4 | * Copyright (C) 2010 Texas Instruments, Inc |
| 5 | * |
| 6 | * Author: Miguel Aguilar <miguel.aguilar@ridgerun.com> |
| 7 | * |
| 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. |
| 12 | * |
| 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. |
| 17 | * |
| 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 |
| 21 | */ |
| 22 | |
| 23 | #include <linux/init.h> |
| 24 | #include <linux/module.h> |
| 25 | #include <linux/device.h> |
Tejun Heo | 8c0d8fa | 2010-03-30 02:52:40 +0900 | [diff] [blame] | 26 | #include <linux/slab.h> |
Miguel Aguilar | ca26308 | 2010-03-11 09:32:21 -0600 | [diff] [blame] | 27 | #include <linux/delay.h> |
| 28 | #include <linux/io.h> |
| 29 | #include <linux/clk.h> |
| 30 | |
| 31 | #include <sound/pcm.h> |
| 32 | |
| 33 | #include <linux/mfd/davinci_voicecodec.h> |
| 34 | |
Miguel Aguilar | ca26308 | 2010-03-11 09:32:21 -0600 | [diff] [blame] | 35 | static int __init davinci_vc_probe(struct platform_device *pdev) |
| 36 | { |
| 37 | struct davinci_vc *davinci_vc; |
Sachin Kamat | c8eaed4 | 2013-06-18 15:35:40 +0530 | [diff] [blame] | 38 | struct resource *res; |
Miguel Aguilar | ca26308 | 2010-03-11 09:32:21 -0600 | [diff] [blame] | 39 | struct mfd_cell *cell = NULL; |
| 40 | int ret; |
| 41 | |
Lee Jones | 099053a | 2013-05-23 16:25:11 +0100 | [diff] [blame] | 42 | davinci_vc = devm_kzalloc(&pdev->dev, |
| 43 | sizeof(struct davinci_vc), GFP_KERNEL); |
Miguel Aguilar | ca26308 | 2010-03-11 09:32:21 -0600 | [diff] [blame] | 44 | if (!davinci_vc) { |
| 45 | dev_dbg(&pdev->dev, |
| 46 | "could not allocate memory for private data\n"); |
| 47 | return -ENOMEM; |
| 48 | } |
| 49 | |
Sachin Kamat | c8eaed4 | 2013-06-18 15:35:40 +0530 | [diff] [blame] | 50 | davinci_vc->clk = devm_clk_get(&pdev->dev, NULL); |
Miguel Aguilar | ca26308 | 2010-03-11 09:32:21 -0600 | [diff] [blame] | 51 | if (IS_ERR(davinci_vc->clk)) { |
| 52 | dev_dbg(&pdev->dev, |
| 53 | "could not get the clock for voice codec\n"); |
Lee Jones | 099053a | 2013-05-23 16:25:11 +0100 | [diff] [blame] | 54 | return -ENODEV; |
Miguel Aguilar | ca26308 | 2010-03-11 09:32:21 -0600 | [diff] [blame] | 55 | } |
| 56 | clk_enable(davinci_vc->clk); |
| 57 | |
| 58 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
Miguel Aguilar | ca26308 | 2010-03-11 09:32:21 -0600 | [diff] [blame] | 59 | |
Sachin Kamat | c8eaed4 | 2013-06-18 15:35:40 +0530 | [diff] [blame] | 60 | davinci_vc->base = devm_ioremap_resource(&pdev->dev, res); |
| 61 | if (IS_ERR(davinci_vc->base)) { |
| 62 | ret = PTR_ERR(davinci_vc->base); |
| 63 | goto fail; |
Miguel Aguilar | ca26308 | 2010-03-11 09:32:21 -0600 | [diff] [blame] | 64 | } |
| 65 | |
| 66 | res = platform_get_resource(pdev, IORESOURCE_DMA, 0); |
| 67 | if (!res) { |
| 68 | dev_err(&pdev->dev, "no DMA resource\n"); |
Julia Lawall | e2bde787 | 2010-06-01 16:34:38 +0200 | [diff] [blame] | 69 | ret = -ENXIO; |
Sachin Kamat | c8eaed4 | 2013-06-18 15:35:40 +0530 | [diff] [blame] | 70 | goto fail; |
Miguel Aguilar | ca26308 | 2010-03-11 09:32:21 -0600 | [diff] [blame] | 71 | } |
| 72 | |
| 73 | davinci_vc->davinci_vcif.dma_tx_channel = res->start; |
| 74 | davinci_vc->davinci_vcif.dma_tx_addr = |
| 75 | (dma_addr_t)(io_v2p(davinci_vc->base) + DAVINCI_VC_WFIFO); |
| 76 | |
| 77 | res = platform_get_resource(pdev, IORESOURCE_DMA, 1); |
| 78 | if (!res) { |
| 79 | dev_err(&pdev->dev, "no DMA resource\n"); |
Julia Lawall | e2bde787 | 2010-06-01 16:34:38 +0200 | [diff] [blame] | 80 | ret = -ENXIO; |
Sachin Kamat | c8eaed4 | 2013-06-18 15:35:40 +0530 | [diff] [blame] | 81 | goto fail; |
Miguel Aguilar | ca26308 | 2010-03-11 09:32:21 -0600 | [diff] [blame] | 82 | } |
| 83 | |
| 84 | davinci_vc->davinci_vcif.dma_rx_channel = res->start; |
| 85 | davinci_vc->davinci_vcif.dma_rx_addr = |
| 86 | (dma_addr_t)(io_v2p(davinci_vc->base) + DAVINCI_VC_RFIFO); |
| 87 | |
| 88 | davinci_vc->dev = &pdev->dev; |
| 89 | davinci_vc->pdev = pdev; |
| 90 | |
| 91 | /* Voice codec interface client */ |
| 92 | cell = &davinci_vc->cells[DAVINCI_VC_VCIF_CELL]; |
Manjunathappa, Prakash | 73ee652 | 2011-01-27 18:58:36 +0530 | [diff] [blame] | 93 | cell->name = "davinci-vcif"; |
Samuel Ortiz | cb5811c | 2011-04-06 16:39:45 +0200 | [diff] [blame] | 94 | cell->platform_data = davinci_vc; |
| 95 | cell->pdata_size = sizeof(*davinci_vc); |
Miguel Aguilar | ca26308 | 2010-03-11 09:32:21 -0600 | [diff] [blame] | 96 | |
| 97 | /* Voice codec CQ93VC client */ |
| 98 | cell = &davinci_vc->cells[DAVINCI_VC_CQ93VC_CELL]; |
Manjunathappa, Prakash | 73ee652 | 2011-01-27 18:58:36 +0530 | [diff] [blame] | 99 | cell->name = "cq93vc-codec"; |
Samuel Ortiz | cb5811c | 2011-04-06 16:39:45 +0200 | [diff] [blame] | 100 | cell->platform_data = davinci_vc; |
| 101 | cell->pdata_size = sizeof(*davinci_vc); |
Miguel Aguilar | ca26308 | 2010-03-11 09:32:21 -0600 | [diff] [blame] | 102 | |
| 103 | ret = mfd_add_devices(&pdev->dev, pdev->id, davinci_vc->cells, |
Mark Brown | 0848c94 | 2012-09-11 15:16:36 +0800 | [diff] [blame] | 104 | DAVINCI_VC_CELLS, NULL, 0, NULL); |
Miguel Aguilar | ca26308 | 2010-03-11 09:32:21 -0600 | [diff] [blame] | 105 | if (ret != 0) { |
| 106 | dev_err(&pdev->dev, "fail to register client devices\n"); |
Sachin Kamat | c8eaed4 | 2013-06-18 15:35:40 +0530 | [diff] [blame] | 107 | goto fail; |
Miguel Aguilar | ca26308 | 2010-03-11 09:32:21 -0600 | [diff] [blame] | 108 | } |
| 109 | |
| 110 | return 0; |
| 111 | |
Sachin Kamat | c8eaed4 | 2013-06-18 15:35:40 +0530 | [diff] [blame] | 112 | fail: |
Miguel Aguilar | ca26308 | 2010-03-11 09:32:21 -0600 | [diff] [blame] | 113 | clk_disable(davinci_vc->clk); |
Miguel Aguilar | ca26308 | 2010-03-11 09:32:21 -0600 | [diff] [blame] | 114 | |
| 115 | return ret; |
| 116 | } |
| 117 | |
Bill Pemberton | 4740f73 | 2012-11-19 13:26:01 -0500 | [diff] [blame] | 118 | static int davinci_vc_remove(struct platform_device *pdev) |
Miguel Aguilar | ca26308 | 2010-03-11 09:32:21 -0600 | [diff] [blame] | 119 | { |
| 120 | struct davinci_vc *davinci_vc = platform_get_drvdata(pdev); |
| 121 | |
| 122 | mfd_remove_devices(&pdev->dev); |
| 123 | |
Miguel Aguilar | ca26308 | 2010-03-11 09:32:21 -0600 | [diff] [blame] | 124 | clk_disable(davinci_vc->clk); |
Miguel Aguilar | ca26308 | 2010-03-11 09:32:21 -0600 | [diff] [blame] | 125 | |
Miguel Aguilar | ca26308 | 2010-03-11 09:32:21 -0600 | [diff] [blame] | 126 | return 0; |
| 127 | } |
| 128 | |
| 129 | static struct platform_driver davinci_vc_driver = { |
| 130 | .driver = { |
| 131 | .name = "davinci_voicecodec", |
| 132 | .owner = THIS_MODULE, |
| 133 | }, |
Bill Pemberton | 8444921 | 2012-11-19 13:20:24 -0500 | [diff] [blame] | 134 | .remove = davinci_vc_remove, |
Miguel Aguilar | ca26308 | 2010-03-11 09:32:21 -0600 | [diff] [blame] | 135 | }; |
| 136 | |
Jingoo Han | 3de764d | 2013-03-05 13:48:28 +0900 | [diff] [blame] | 137 | module_platform_driver_probe(davinci_vc_driver, davinci_vc_probe); |
Miguel Aguilar | ca26308 | 2010-03-11 09:32:21 -0600 | [diff] [blame] | 138 | |
| 139 | MODULE_AUTHOR("Miguel Aguilar"); |
| 140 | MODULE_DESCRIPTION("Texas Instruments DaVinci Voice Codec Core Interface"); |
| 141 | MODULE_LICENSE("GPL"); |