/* * 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> 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");