diff options
Diffstat (limited to 'ANDROID_3.4.5/sound/soc/omap/omap-mcpdm.c')
| -rw-r--r-- | ANDROID_3.4.5/sound/soc/omap/omap-mcpdm.c | 524 |
1 files changed, 0 insertions, 524 deletions
diff --git a/ANDROID_3.4.5/sound/soc/omap/omap-mcpdm.c b/ANDROID_3.4.5/sound/soc/omap/omap-mcpdm.c deleted file mode 100644 index 39705561..00000000 --- a/ANDROID_3.4.5/sound/soc/omap/omap-mcpdm.c +++ /dev/null @@ -1,524 +0,0 @@ -/* - * omap-mcpdm.c -- OMAP ALSA SoC DAI driver using McPDM port - * - * Copyright (C) 2009 - 2011 Texas Instruments - * - * Author: Misael Lopez Cruz <misael.lopez@ti.com> - * Contact: Jorge Eduardo Candelaria <x0107209@ti.com> - * Margarita Olaya <magi.olaya@ti.com> - * Peter Ujfalusi <peter.ujfalusi@ti.com> - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * version 2 as published by the Free Software Foundation. - * - * 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., 51 Franklin St, Fifth Floor, Boston, MA - * 02110-1301 USA - * - */ - -#include <linux/init.h> -#include <linux/module.h> -#include <linux/platform_device.h> -#include <linux/interrupt.h> -#include <linux/err.h> -#include <linux/io.h> -#include <linux/irq.h> -#include <linux/slab.h> -#include <linux/pm_runtime.h> - -#include <sound/core.h> -#include <sound/pcm.h> -#include <sound/pcm_params.h> -#include <sound/soc.h> - -#include <plat/dma.h> -#include <plat/omap_hwmod.h> -#include "omap-mcpdm.h" -#include "omap-pcm.h" - -struct omap_mcpdm { - struct device *dev; - unsigned long phys_base; - void __iomem *io_base; - int irq; - - struct mutex mutex; - - /* channel data */ - u32 dn_channels; - u32 up_channels; - - /* McPDM FIFO thresholds */ - u32 dn_threshold; - u32 up_threshold; - - /* McPDM dn offsets for rx1, and 2 channels */ - u32 dn_rx_offset; -}; - -/* - * Stream DMA parameters - */ -static struct omap_pcm_dma_data omap_mcpdm_dai_dma_params[] = { - { - .name = "Audio playback", - .dma_req = OMAP44XX_DMA_MCPDM_DL, - .data_type = OMAP_DMA_DATA_TYPE_S32, - .sync_mode = OMAP_DMA_SYNC_PACKET, - .port_addr = OMAP44XX_MCPDM_L3_BASE + MCPDM_REG_DN_DATA, - }, - { - .name = "Audio capture", - .dma_req = OMAP44XX_DMA_MCPDM_UP, - .data_type = OMAP_DMA_DATA_TYPE_S32, - .sync_mode = OMAP_DMA_SYNC_PACKET, - .port_addr = OMAP44XX_MCPDM_L3_BASE + MCPDM_REG_UP_DATA, - }, -}; - -static inline void omap_mcpdm_write(struct omap_mcpdm *mcpdm, u16 reg, u32 val) -{ - __raw_writel(val, mcpdm->io_base + reg); -} - -static inline int omap_mcpdm_read(struct omap_mcpdm *mcpdm, u16 reg) -{ - return __raw_readl(mcpdm->io_base + reg); -} - -#ifdef DEBUG -static void omap_mcpdm_reg_dump(struct omap_mcpdm *mcpdm) -{ - dev_dbg(mcpdm->dev, "***********************\n"); - dev_dbg(mcpdm->dev, "IRQSTATUS_RAW: 0x%04x\n", - omap_mcpdm_read(mcpdm, MCPDM_REG_IRQSTATUS_RAW)); - dev_dbg(mcpdm->dev, "IRQSTATUS: 0x%04x\n", - omap_mcpdm_read(mcpdm, MCPDM_REG_IRQSTATUS)); - dev_dbg(mcpdm->dev, "IRQENABLE_SET: 0x%04x\n", - omap_mcpdm_read(mcpdm, MCPDM_REG_IRQENABLE_SET)); - dev_dbg(mcpdm->dev, "IRQENABLE_CLR: 0x%04x\n", - omap_mcpdm_read(mcpdm, MCPDM_REG_IRQENABLE_CLR)); - dev_dbg(mcpdm->dev, "IRQWAKE_EN: 0x%04x\n", - omap_mcpdm_read(mcpdm, MCPDM_REG_IRQWAKE_EN)); - dev_dbg(mcpdm->dev, "DMAENABLE_SET: 0x%04x\n", - omap_mcpdm_read(mcpdm, MCPDM_REG_DMAENABLE_SET)); - dev_dbg(mcpdm->dev, "DMAENABLE_CLR: 0x%04x\n", - omap_mcpdm_read(mcpdm, MCPDM_REG_DMAENABLE_CLR)); - dev_dbg(mcpdm->dev, "DMAWAKEEN: 0x%04x\n", - omap_mcpdm_read(mcpdm, MCPDM_REG_DMAWAKEEN)); - dev_dbg(mcpdm->dev, "CTRL: 0x%04x\n", - omap_mcpdm_read(mcpdm, MCPDM_REG_CTRL)); - dev_dbg(mcpdm->dev, "DN_DATA: 0x%04x\n", - omap_mcpdm_read(mcpdm, MCPDM_REG_DN_DATA)); - dev_dbg(mcpdm->dev, "UP_DATA: 0x%04x\n", - omap_mcpdm_read(mcpdm, MCPDM_REG_UP_DATA)); - dev_dbg(mcpdm->dev, "FIFO_CTRL_DN: 0x%04x\n", - omap_mcpdm_read(mcpdm, MCPDM_REG_FIFO_CTRL_DN)); - dev_dbg(mcpdm->dev, "FIFO_CTRL_UP: 0x%04x\n", - omap_mcpdm_read(mcpdm, MCPDM_REG_FIFO_CTRL_UP)); - dev_dbg(mcpdm->dev, "***********************\n"); -} -#else -static void omap_mcpdm_reg_dump(struct omap_mcpdm *mcpdm) {} -#endif - -/* - * Enables the transfer through the PDM interface to/from the Phoenix - * codec by enabling the corresponding UP or DN channels. - */ -static void omap_mcpdm_start(struct omap_mcpdm *mcpdm) -{ - u32 ctrl = omap_mcpdm_read(mcpdm, MCPDM_REG_CTRL); - - ctrl |= (MCPDM_SW_DN_RST | MCPDM_SW_UP_RST); - omap_mcpdm_write(mcpdm, MCPDM_REG_CTRL, ctrl); - - ctrl |= mcpdm->dn_channels | mcpdm->up_channels; - omap_mcpdm_write(mcpdm, MCPDM_REG_CTRL, ctrl); - - ctrl &= ~(MCPDM_SW_DN_RST | MCPDM_SW_UP_RST); - omap_mcpdm_write(mcpdm, MCPDM_REG_CTRL, ctrl); -} - -/* - * Disables the transfer through the PDM interface to/from the Phoenix - * codec by disabling the corresponding UP or DN channels. - */ -static void omap_mcpdm_stop(struct omap_mcpdm *mcpdm) -{ - u32 ctrl = omap_mcpdm_read(mcpdm, MCPDM_REG_CTRL); - - ctrl |= (MCPDM_SW_DN_RST | MCPDM_SW_UP_RST); - omap_mcpdm_write(mcpdm, MCPDM_REG_CTRL, ctrl); - - ctrl &= ~(mcpdm->dn_channels | mcpdm->up_channels); - omap_mcpdm_write(mcpdm, MCPDM_REG_CTRL, ctrl); - - ctrl &= ~(MCPDM_SW_DN_RST | MCPDM_SW_UP_RST); - omap_mcpdm_write(mcpdm, MCPDM_REG_CTRL, ctrl); - -} - -/* - * Is the physical McPDM interface active. - */ -static inline int omap_mcpdm_active(struct omap_mcpdm *mcpdm) -{ - return omap_mcpdm_read(mcpdm, MCPDM_REG_CTRL) & - (MCPDM_PDM_DN_MASK | MCPDM_PDM_UP_MASK); -} - -/* - * Configures McPDM uplink, and downlink for audio. - * This function should be called before omap_mcpdm_start. - */ -static void omap_mcpdm_open_streams(struct omap_mcpdm *mcpdm) -{ - omap_mcpdm_write(mcpdm, MCPDM_REG_IRQENABLE_SET, - MCPDM_DN_IRQ_EMPTY | MCPDM_DN_IRQ_FULL | - MCPDM_UP_IRQ_EMPTY | MCPDM_UP_IRQ_FULL); - - /* Enable DN RX1/2 offset cancellation feature, if configured */ - if (mcpdm->dn_rx_offset) { - u32 dn_offset = mcpdm->dn_rx_offset; - - omap_mcpdm_write(mcpdm, MCPDM_REG_DN_OFFSET, dn_offset); - dn_offset |= (MCPDM_DN_OFST_RX1_EN | MCPDM_DN_OFST_RX2_EN); - omap_mcpdm_write(mcpdm, MCPDM_REG_DN_OFFSET, dn_offset); - } - - omap_mcpdm_write(mcpdm, MCPDM_REG_FIFO_CTRL_DN, mcpdm->dn_threshold); - omap_mcpdm_write(mcpdm, MCPDM_REG_FIFO_CTRL_UP, mcpdm->up_threshold); - - omap_mcpdm_write(mcpdm, MCPDM_REG_DMAENABLE_SET, - MCPDM_DMA_DN_ENABLE | MCPDM_DMA_UP_ENABLE); -} - -/* - * Cleans McPDM uplink, and downlink configuration. - * This function should be called when the stream is closed. - */ -static void omap_mcpdm_close_streams(struct omap_mcpdm *mcpdm) -{ - /* Disable irq request generation for downlink */ - omap_mcpdm_write(mcpdm, MCPDM_REG_IRQENABLE_CLR, - MCPDM_DN_IRQ_EMPTY | MCPDM_DN_IRQ_FULL); - - /* Disable DMA request generation for downlink */ - omap_mcpdm_write(mcpdm, MCPDM_REG_DMAENABLE_CLR, MCPDM_DMA_DN_ENABLE); - - /* Disable irq request generation for uplink */ - omap_mcpdm_write(mcpdm, MCPDM_REG_IRQENABLE_CLR, - MCPDM_UP_IRQ_EMPTY | MCPDM_UP_IRQ_FULL); - - /* Disable DMA request generation for uplink */ - omap_mcpdm_write(mcpdm, MCPDM_REG_DMAENABLE_CLR, MCPDM_DMA_UP_ENABLE); - - /* Disable RX1/2 offset cancellation */ - if (mcpdm->dn_rx_offset) - omap_mcpdm_write(mcpdm, MCPDM_REG_DN_OFFSET, 0); -} - -static irqreturn_t omap_mcpdm_irq_handler(int irq, void *dev_id) -{ - struct omap_mcpdm *mcpdm = dev_id; - int irq_status; - - irq_status = omap_mcpdm_read(mcpdm, MCPDM_REG_IRQSTATUS); - - /* Acknowledge irq event */ - omap_mcpdm_write(mcpdm, MCPDM_REG_IRQSTATUS, irq_status); - - if (irq_status & MCPDM_DN_IRQ_FULL) - dev_dbg(mcpdm->dev, "DN (playback) FIFO Full\n"); - - if (irq_status & MCPDM_DN_IRQ_EMPTY) - dev_dbg(mcpdm->dev, "DN (playback) FIFO Empty\n"); - - if (irq_status & MCPDM_DN_IRQ) - dev_dbg(mcpdm->dev, "DN (playback) write request\n"); - - if (irq_status & MCPDM_UP_IRQ_FULL) - dev_dbg(mcpdm->dev, "UP (capture) FIFO Full\n"); - - if (irq_status & MCPDM_UP_IRQ_EMPTY) - dev_dbg(mcpdm->dev, "UP (capture) FIFO Empty\n"); - - if (irq_status & MCPDM_UP_IRQ) - dev_dbg(mcpdm->dev, "UP (capture) write request\n"); - - return IRQ_HANDLED; -} - -static int omap_mcpdm_dai_startup(struct snd_pcm_substream *substream, - struct snd_soc_dai *dai) -{ - struct omap_mcpdm *mcpdm = snd_soc_dai_get_drvdata(dai); - - mutex_lock(&mcpdm->mutex); - - if (!dai->active) { - /* Enable watch dog for ES above ES 1.0 to avoid saturation */ - if (omap_rev() != OMAP4430_REV_ES1_0) { - u32 ctrl = omap_mcpdm_read(mcpdm, MCPDM_REG_CTRL); - - omap_mcpdm_write(mcpdm, MCPDM_REG_CTRL, - ctrl | MCPDM_WD_EN); - } - omap_mcpdm_open_streams(mcpdm); - } - - mutex_unlock(&mcpdm->mutex); - - return 0; -} - -static void omap_mcpdm_dai_shutdown(struct snd_pcm_substream *substream, - struct snd_soc_dai *dai) -{ - struct omap_mcpdm *mcpdm = snd_soc_dai_get_drvdata(dai); - - mutex_lock(&mcpdm->mutex); - - if (!dai->active) { - if (omap_mcpdm_active(mcpdm)) { - omap_mcpdm_stop(mcpdm); - omap_mcpdm_close_streams(mcpdm); - } - } - - mutex_unlock(&mcpdm->mutex); -} - -static int omap_mcpdm_dai_hw_params(struct snd_pcm_substream *substream, - struct snd_pcm_hw_params *params, - struct snd_soc_dai *dai) -{ - struct omap_mcpdm *mcpdm = snd_soc_dai_get_drvdata(dai); - int stream = substream->stream; - struct omap_pcm_dma_data *dma_data; - int channels; - int link_mask = 0; - - channels = params_channels(params); - switch (channels) { - case 5: - if (stream == SNDRV_PCM_STREAM_CAPTURE) - /* up to 3 channels for capture */ - return -EINVAL; - link_mask |= 1 << 4; - case 4: - if (stream == SNDRV_PCM_STREAM_CAPTURE) - /* up to 3 channels for capture */ - return -EINVAL; - link_mask |= 1 << 3; - case 3: - link_mask |= 1 << 2; - case 2: - link_mask |= 1 << 1; - case 1: - link_mask |= 1 << 0; - break; - default: - /* unsupported number of channels */ - return -EINVAL; - } - - dma_data = &omap_mcpdm_dai_dma_params[stream]; - - /* Configure McPDM channels, and DMA packet size */ - if (stream == SNDRV_PCM_STREAM_PLAYBACK) { - mcpdm->dn_channels = link_mask << 3; - dma_data->packet_size = - (MCPDM_DN_THRES_MAX - mcpdm->dn_threshold) * channels; - } else { - mcpdm->up_channels = link_mask << 0; - dma_data->packet_size = mcpdm->up_threshold * channels; - } - - snd_soc_dai_set_dma_data(dai, substream, dma_data); - - return 0; -} - -static int omap_mcpdm_prepare(struct snd_pcm_substream *substream, - struct snd_soc_dai *dai) -{ - struct omap_mcpdm *mcpdm = snd_soc_dai_get_drvdata(dai); - - if (!omap_mcpdm_active(mcpdm)) { - omap_mcpdm_start(mcpdm); - omap_mcpdm_reg_dump(mcpdm); - } - - return 0; -} - -static const struct snd_soc_dai_ops omap_mcpdm_dai_ops = { - .startup = omap_mcpdm_dai_startup, - .shutdown = omap_mcpdm_dai_shutdown, - .hw_params = omap_mcpdm_dai_hw_params, - .prepare = omap_mcpdm_prepare, -}; - -static int omap_mcpdm_probe(struct snd_soc_dai *dai) -{ - struct omap_mcpdm *mcpdm = snd_soc_dai_get_drvdata(dai); - int ret; - - pm_runtime_enable(mcpdm->dev); - - /* Disable lines while request is ongoing */ - pm_runtime_get_sync(mcpdm->dev); - omap_mcpdm_write(mcpdm, MCPDM_REG_CTRL, 0x00); - - ret = request_irq(mcpdm->irq, omap_mcpdm_irq_handler, - 0, "McPDM", (void *)mcpdm); - - pm_runtime_put_sync(mcpdm->dev); - - if (ret) { - dev_err(mcpdm->dev, "Request for IRQ failed\n"); - pm_runtime_disable(mcpdm->dev); - } - - /* Configure McPDM threshold values */ - mcpdm->dn_threshold = 2; - mcpdm->up_threshold = MCPDM_UP_THRES_MAX - 3; - return ret; -} - -static int omap_mcpdm_remove(struct snd_soc_dai *dai) -{ - struct omap_mcpdm *mcpdm = snd_soc_dai_get_drvdata(dai); - - free_irq(mcpdm->irq, (void *)mcpdm); - pm_runtime_disable(mcpdm->dev); - - return 0; -} - -#define OMAP_MCPDM_RATES (SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000) -#define OMAP_MCPDM_FORMATS SNDRV_PCM_FMTBIT_S32_LE - -static struct snd_soc_dai_driver omap_mcpdm_dai = { - .probe = omap_mcpdm_probe, - .remove = omap_mcpdm_remove, - .probe_order = SND_SOC_COMP_ORDER_LATE, - .remove_order = SND_SOC_COMP_ORDER_EARLY, - .playback = { - .channels_min = 1, - .channels_max = 5, - .rates = OMAP_MCPDM_RATES, - .formats = OMAP_MCPDM_FORMATS, - .sig_bits = 24, - }, - .capture = { - .channels_min = 1, - .channels_max = 3, - .rates = OMAP_MCPDM_RATES, - .formats = OMAP_MCPDM_FORMATS, - .sig_bits = 24, - }, - .ops = &omap_mcpdm_dai_ops, -}; - -void omap_mcpdm_configure_dn_offsets(struct snd_soc_pcm_runtime *rtd, - u8 rx1, u8 rx2) -{ - struct omap_mcpdm *mcpdm = snd_soc_dai_get_drvdata(rtd->cpu_dai); - - mcpdm->dn_rx_offset = MCPDM_DNOFST_RX1(rx1) | MCPDM_DNOFST_RX2(rx2); -} -EXPORT_SYMBOL_GPL(omap_mcpdm_configure_dn_offsets); - -static __devinit int asoc_mcpdm_probe(struct platform_device *pdev) -{ - struct omap_mcpdm *mcpdm; - struct resource *res; - int ret = 0; - - mcpdm = kzalloc(sizeof(struct omap_mcpdm), GFP_KERNEL); - if (!mcpdm) - return -ENOMEM; - - platform_set_drvdata(pdev, mcpdm); - - mutex_init(&mcpdm->mutex); - - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (res == NULL) { - dev_err(&pdev->dev, "no resource\n"); - goto err_res; - } - - if (!request_mem_region(res->start, resource_size(res), "McPDM")) { - ret = -EBUSY; - goto err_res; - } - - mcpdm->io_base = ioremap(res->start, resource_size(res)); - if (!mcpdm->io_base) { - ret = -ENOMEM; - goto err_iomap; - } - - mcpdm->irq = platform_get_irq(pdev, 0); - if (mcpdm->irq < 0) { - ret = mcpdm->irq; - goto err_irq; - } - - mcpdm->dev = &pdev->dev; - - ret = snd_soc_register_dai(&pdev->dev, &omap_mcpdm_dai); - if (!ret) - return 0; - -err_irq: - iounmap(mcpdm->io_base); -err_iomap: - release_mem_region(res->start, resource_size(res)); -err_res: - kfree(mcpdm); - return ret; -} - -static int __devexit asoc_mcpdm_remove(struct platform_device *pdev) -{ - struct omap_mcpdm *mcpdm = platform_get_drvdata(pdev); - struct resource *res; - - snd_soc_unregister_dai(&pdev->dev); - - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - iounmap(mcpdm->io_base); - release_mem_region(res->start, resource_size(res)); - - kfree(mcpdm); - return 0; -} - -static struct platform_driver asoc_mcpdm_driver = { - .driver = { - .name = "omap-mcpdm", - .owner = THIS_MODULE, - }, - - .probe = asoc_mcpdm_probe, - .remove = __devexit_p(asoc_mcpdm_remove), -}; - -module_platform_driver(asoc_mcpdm_driver); - -MODULE_AUTHOR("Misael Lopez Cruz <misael.lopez@ti.com>"); -MODULE_DESCRIPTION("OMAP PDM SoC Interface"); -MODULE_LICENSE("GPL"); |