diff options
Diffstat (limited to 'drivers/mfd/davinci_voicecodec.c')
| -rw-r--r-- | drivers/mfd/davinci_voicecodec.c | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/drivers/mfd/davinci_voicecodec.c b/drivers/mfd/davinci_voicecodec.c new file mode 100644 index 000000000..4d0a5f380 --- /dev/null +++ b/drivers/mfd/davinci_voicecodec.c @@ -0,0 +1,152 @@ +/* + * 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"); |