| /* |
| * DaVinci Voice Codec Core Interface for TI platforms |
| * |
| * Copyright (C) 2010 Texas Instruments, Inc |
| * |
| * Author: Miguel Aguilar <miguel.aguilar@ridgerun.com> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| */ |
| |
| #include <linux/init.h> |
| #include <linux/module.h> |
| #include <linux/device.h> |
| #include <linux/slab.h> |
| #include <linux/delay.h> |
| #include <linux/io.h> |
| #include <linux/clk.h> |
| #include <linux/regmap.h> |
| |
| #include <sound/pcm.h> |
| |
| #include <linux/mfd/davinci_voicecodec.h> |
| #include <mach/hardware.h> |
| |
| static const struct regmap_config davinci_vc_regmap = { |
| .reg_bits = 32, |
| .val_bits = 32, |
| }; |
| |
| static int __init davinci_vc_probe(struct platform_device *pdev) |
| { |
| struct davinci_vc *davinci_vc; |
| struct resource *res; |
| struct mfd_cell *cell = NULL; |
| int ret; |
| |
| davinci_vc = devm_kzalloc(&pdev->dev, |
| sizeof(struct davinci_vc), GFP_KERNEL); |
| if (!davinci_vc) |
| return -ENOMEM; |
| |
| davinci_vc->clk = devm_clk_get(&pdev->dev, NULL); |
| if (IS_ERR(davinci_vc->clk)) { |
| dev_dbg(&pdev->dev, |
| "could not get the clock for voice codec\n"); |
| return -ENODEV; |
| } |
| clk_enable(davinci_vc->clk); |
| |
| res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| |
| davinci_vc->base = devm_ioremap_resource(&pdev->dev, res); |
| if (IS_ERR(davinci_vc->base)) { |
| ret = PTR_ERR(davinci_vc->base); |
| goto fail; |
| } |
| |
| davinci_vc->regmap = devm_regmap_init_mmio(&pdev->dev, |
| davinci_vc->base, |
| &davinci_vc_regmap); |
| if (IS_ERR(davinci_vc->regmap)) { |
| ret = PTR_ERR(davinci_vc->regmap); |
| goto fail; |
| } |
| |
| res = platform_get_resource(pdev, IORESOURCE_DMA, 0); |
| if (!res) { |
| dev_err(&pdev->dev, "no DMA resource\n"); |
| ret = -ENXIO; |
| goto fail; |
| } |
| |
| davinci_vc->davinci_vcif.dma_tx_channel = res->start; |
| davinci_vc->davinci_vcif.dma_tx_addr = |
| (dma_addr_t)(io_v2p(davinci_vc->base) + DAVINCI_VC_WFIFO); |
| |
| res = platform_get_resource(pdev, IORESOURCE_DMA, 1); |
| if (!res) { |
| dev_err(&pdev->dev, "no DMA resource\n"); |
| ret = -ENXIO; |
| goto fail; |
| } |
| |
| davinci_vc->davinci_vcif.dma_rx_channel = res->start; |
| davinci_vc->davinci_vcif.dma_rx_addr = |
| (dma_addr_t)(io_v2p(davinci_vc->base) + DAVINCI_VC_RFIFO); |
| |
| davinci_vc->dev = &pdev->dev; |
| davinci_vc->pdev = pdev; |
| |
| /* Voice codec interface client */ |
| cell = &davinci_vc->cells[DAVINCI_VC_VCIF_CELL]; |
| cell->name = "davinci-vcif"; |
| cell->platform_data = davinci_vc; |
| cell->pdata_size = sizeof(*davinci_vc); |
| |
| /* Voice codec CQ93VC client */ |
| cell = &davinci_vc->cells[DAVINCI_VC_CQ93VC_CELL]; |
| cell->name = "cq93vc-codec"; |
| cell->platform_data = davinci_vc; |
| cell->pdata_size = sizeof(*davinci_vc); |
| |
| ret = mfd_add_devices(&pdev->dev, pdev->id, davinci_vc->cells, |
| DAVINCI_VC_CELLS, NULL, 0, NULL); |
| if (ret != 0) { |
| dev_err(&pdev->dev, "fail to register client devices\n"); |
| goto fail; |
| } |
| |
| return 0; |
| |
| fail: |
| clk_disable(davinci_vc->clk); |
| |
| return ret; |
| } |
| |
| static int davinci_vc_remove(struct platform_device *pdev) |
| { |
| struct davinci_vc *davinci_vc = platform_get_drvdata(pdev); |
| |
| mfd_remove_devices(&pdev->dev); |
| |
| clk_disable(davinci_vc->clk); |
| |
| return 0; |
| } |
| |
| static struct platform_driver davinci_vc_driver = { |
| .driver = { |
| .name = "davinci_voicecodec", |
| }, |
| .remove = davinci_vc_remove, |
| }; |
| |
| module_platform_driver_probe(davinci_vc_driver, davinci_vc_probe); |
| |
| MODULE_AUTHOR("Miguel Aguilar"); |
| MODULE_DESCRIPTION("Texas Instruments DaVinci Voice Codec Core Interface"); |
| MODULE_LICENSE("GPL"); |