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 | |
| 35 | u32 davinci_vc_read(struct davinci_vc *davinci_vc, int reg) |
| 36 | { |
| 37 | return __raw_readl(davinci_vc->base + reg); |
| 38 | } |
| 39 | |
| 40 | void davinci_vc_write(struct davinci_vc *davinci_vc, |
| 41 | int reg, u32 val) |
| 42 | { |
| 43 | __raw_writel(val, davinci_vc->base + reg); |
| 44 | } |
| 45 | |
| 46 | static int __init davinci_vc_probe(struct platform_device *pdev) |
| 47 | { |
| 48 | struct davinci_vc *davinci_vc; |
| 49 | struct resource *res, *mem; |
| 50 | struct mfd_cell *cell = NULL; |
| 51 | int ret; |
| 52 | |
| 53 | davinci_vc = kzalloc(sizeof(struct davinci_vc), GFP_KERNEL); |
| 54 | if (!davinci_vc) { |
| 55 | dev_dbg(&pdev->dev, |
| 56 | "could not allocate memory for private data\n"); |
| 57 | return -ENOMEM; |
| 58 | } |
| 59 | |
| 60 | davinci_vc->clk = clk_get(&pdev->dev, NULL); |
| 61 | if (IS_ERR(davinci_vc->clk)) { |
| 62 | dev_dbg(&pdev->dev, |
| 63 | "could not get the clock for voice codec\n"); |
| 64 | ret = -ENODEV; |
| 65 | goto fail1; |
| 66 | } |
| 67 | clk_enable(davinci_vc->clk); |
| 68 | |
| 69 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| 70 | if (!res) { |
| 71 | dev_err(&pdev->dev, "no mem resource\n"); |
| 72 | ret = -ENODEV; |
| 73 | goto fail2; |
| 74 | } |
| 75 | |
| 76 | davinci_vc->pbase = res->start; |
| 77 | davinci_vc->base_size = resource_size(res); |
| 78 | |
| 79 | mem = request_mem_region(davinci_vc->pbase, davinci_vc->base_size, |
| 80 | pdev->name); |
| 81 | if (!mem) { |
| 82 | dev_err(&pdev->dev, "VCIF region already claimed\n"); |
| 83 | ret = -EBUSY; |
| 84 | goto fail2; |
| 85 | } |
| 86 | |
| 87 | davinci_vc->base = ioremap(davinci_vc->pbase, davinci_vc->base_size); |
| 88 | if (!davinci_vc->base) { |
| 89 | dev_err(&pdev->dev, "can't ioremap mem resource.\n"); |
| 90 | ret = -ENOMEM; |
| 91 | goto fail3; |
| 92 | } |
| 93 | |
| 94 | res = platform_get_resource(pdev, IORESOURCE_DMA, 0); |
| 95 | if (!res) { |
| 96 | dev_err(&pdev->dev, "no DMA resource\n"); |
Julia Lawall | e2bde787 | 2010-06-01 16:34:38 +0200 | [diff] [blame] | 97 | ret = -ENXIO; |
| 98 | goto fail4; |
Miguel Aguilar | ca26308 | 2010-03-11 09:32:21 -0600 | [diff] [blame] | 99 | } |
| 100 | |
| 101 | davinci_vc->davinci_vcif.dma_tx_channel = res->start; |
| 102 | davinci_vc->davinci_vcif.dma_tx_addr = |
| 103 | (dma_addr_t)(io_v2p(davinci_vc->base) + DAVINCI_VC_WFIFO); |
| 104 | |
| 105 | res = platform_get_resource(pdev, IORESOURCE_DMA, 1); |
| 106 | if (!res) { |
| 107 | dev_err(&pdev->dev, "no DMA resource\n"); |
Julia Lawall | e2bde787 | 2010-06-01 16:34:38 +0200 | [diff] [blame] | 108 | ret = -ENXIO; |
| 109 | goto fail4; |
Miguel Aguilar | ca26308 | 2010-03-11 09:32:21 -0600 | [diff] [blame] | 110 | } |
| 111 | |
| 112 | davinci_vc->davinci_vcif.dma_rx_channel = res->start; |
| 113 | davinci_vc->davinci_vcif.dma_rx_addr = |
| 114 | (dma_addr_t)(io_v2p(davinci_vc->base) + DAVINCI_VC_RFIFO); |
| 115 | |
| 116 | davinci_vc->dev = &pdev->dev; |
| 117 | davinci_vc->pdev = pdev; |
| 118 | |
| 119 | /* Voice codec interface client */ |
| 120 | cell = &davinci_vc->cells[DAVINCI_VC_VCIF_CELL]; |
Manjunathappa, Prakash | 73ee652 | 2011-01-27 18:58:36 +0530 | [diff] [blame] | 121 | cell->name = "davinci-vcif"; |
Miguel Aguilar | ca26308 | 2010-03-11 09:32:21 -0600 | [diff] [blame] | 122 | cell->driver_data = davinci_vc; |
| 123 | |
| 124 | /* Voice codec CQ93VC client */ |
| 125 | cell = &davinci_vc->cells[DAVINCI_VC_CQ93VC_CELL]; |
Manjunathappa, Prakash | 73ee652 | 2011-01-27 18:58:36 +0530 | [diff] [blame] | 126 | cell->name = "cq93vc-codec"; |
Miguel Aguilar | ca26308 | 2010-03-11 09:32:21 -0600 | [diff] [blame] | 127 | cell->driver_data = davinci_vc; |
| 128 | |
| 129 | ret = mfd_add_devices(&pdev->dev, pdev->id, davinci_vc->cells, |
| 130 | DAVINCI_VC_CELLS, NULL, 0); |
| 131 | if (ret != 0) { |
| 132 | dev_err(&pdev->dev, "fail to register client devices\n"); |
| 133 | goto fail4; |
| 134 | } |
| 135 | |
| 136 | return 0; |
| 137 | |
| 138 | fail4: |
| 139 | iounmap(davinci_vc->base); |
| 140 | fail3: |
| 141 | release_mem_region(davinci_vc->pbase, davinci_vc->base_size); |
| 142 | fail2: |
| 143 | clk_disable(davinci_vc->clk); |
| 144 | clk_put(davinci_vc->clk); |
| 145 | davinci_vc->clk = NULL; |
| 146 | fail1: |
| 147 | kfree(davinci_vc); |
| 148 | |
| 149 | return ret; |
| 150 | } |
| 151 | |
| 152 | static int __devexit davinci_vc_remove(struct platform_device *pdev) |
| 153 | { |
| 154 | struct davinci_vc *davinci_vc = platform_get_drvdata(pdev); |
| 155 | |
| 156 | mfd_remove_devices(&pdev->dev); |
| 157 | |
| 158 | iounmap(davinci_vc->base); |
| 159 | release_mem_region(davinci_vc->pbase, davinci_vc->base_size); |
| 160 | |
| 161 | clk_disable(davinci_vc->clk); |
| 162 | clk_put(davinci_vc->clk); |
| 163 | davinci_vc->clk = NULL; |
| 164 | |
| 165 | kfree(davinci_vc); |
| 166 | |
| 167 | return 0; |
| 168 | } |
| 169 | |
| 170 | static struct platform_driver davinci_vc_driver = { |
| 171 | .driver = { |
| 172 | .name = "davinci_voicecodec", |
| 173 | .owner = THIS_MODULE, |
| 174 | }, |
| 175 | .remove = __devexit_p(davinci_vc_remove), |
| 176 | }; |
| 177 | |
| 178 | static int __init davinci_vc_init(void) |
| 179 | { |
| 180 | return platform_driver_probe(&davinci_vc_driver, davinci_vc_probe); |
| 181 | } |
| 182 | module_init(davinci_vc_init); |
| 183 | |
| 184 | static void __exit davinci_vc_exit(void) |
| 185 | { |
| 186 | platform_driver_unregister(&davinci_vc_driver); |
| 187 | } |
| 188 | module_exit(davinci_vc_exit); |
| 189 | |
| 190 | MODULE_AUTHOR("Miguel Aguilar"); |
| 191 | MODULE_DESCRIPTION("Texas Instruments DaVinci Voice Codec Core Interface"); |
| 192 | MODULE_LICENSE("GPL"); |