Re: [alsa-devel] [PATCHv2 5/6] ASoC: OMAP4: Add support for McPDM

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On Fri, 2010-01-22 at 17:15 -0600, Candelaria Villareal, Jorge wrote:
> McPDM is the interface between Phoenix audio codec
> and the OMAP4430 processor. It enables data to be transfered
> to/from Phoenix at sample rates of 88.4 or 96 KHz.
> 
> Signed-off-by: Jorge Eduardo Candelaria <x0107209@xxxxxx>
> Signed-off-by: Margarita Olaya <x0080101@xxxxxx>

It initially looks like a some of this can be called directly as DAI ops
rather than by the machine driver.

> ---
>  sound/soc/omap/Kconfig  |    3 +
>  sound/soc/omap/Makefile |    2 +
>  sound/soc/omap/mcpdm.c  |  474 +++++++++++++++++++++++++++++++++++++++++++++++
>  sound/soc/omap/mcpdm.h  |  152 +++++++++++++++
>  4 files changed, 631 insertions(+), 0 deletions(-)
>  create mode 100644 sound/soc/omap/mcpdm.c
>  create mode 100644 sound/soc/omap/mcpdm.h
> 
> diff --git a/sound/soc/omap/Kconfig b/sound/soc/omap/Kconfig
> index 61952aa..b96e9d8 100644
> --- a/sound/soc/omap/Kconfig
> +++ b/sound/soc/omap/Kconfig
> @@ -6,6 +6,9 @@ config SND_OMAP_SOC_MCBSP
>         tristate
>         select OMAP_MCBSP
> 
> +config SND_OMAP_SOC_MCPDM
> +       tristate
> +
>  config SND_OMAP_SOC_N810
>         tristate "SoC Audio support for Nokia N810"
>         depends on SND_OMAP_SOC && MACH_NOKIA_N810 && I2C
> diff --git a/sound/soc/omap/Makefile b/sound/soc/omap/Makefile
> index 3db8a6c..bf8b388 100644
> --- a/sound/soc/omap/Makefile
> +++ b/sound/soc/omap/Makefile
> @@ -1,9 +1,11 @@
>  # OMAP Platform Support
>  snd-soc-omap-objs := omap-pcm.o
>  snd-soc-omap-mcbsp-objs := omap-mcbsp.o
> +snd-soc-omap-mcpdm-objs := mcpdm.o
> 
>  obj-$(CONFIG_SND_OMAP_SOC) += snd-soc-omap.o
>  obj-$(CONFIG_SND_OMAP_SOC_MCBSP) += snd-soc-omap-mcbsp.o
> +obj-$(CONFIG_SND_OMAP_SOC_MCPDM) += snd-soc-omap-mcpdm.o
> 
>  # OMAP Machine Support
>  snd-soc-n810-objs := n810.o
> diff --git a/sound/soc/omap/mcpdm.c b/sound/soc/omap/mcpdm.c
> new file mode 100644
> index 0000000..2bc5acd
> --- /dev/null
> +++ b/sound/soc/omap/mcpdm.c
> @@ -0,0 +1,474 @@
> +/*
> + * mcpdm.c  --  McPDM interface driver
> + *
> + * Author: Jorge Eduardo Candelaria <x0107209@xxxxxx>
> + * Copyright (C) 2009 - Texas Instruments, Inc.
> + *
> + * 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/module.h>
> +#include <linux/init.h>
> +#include <linux/device.h>
> +#include <linux/platform_device.h>
> +#include <linux/wait.h>
> +#include <linux/interrupt.h>
> +#include <linux/err.h>
> +#include <linux/clk.h>
> +#include <linux/delay.h>
> +#include <linux/io.h>
> +#include <linux/irq.h>
> +
> +#include "mcpdm.h"
> +
> +static struct omap_mcpdm *mcpdm;
> +
> +static inline void omap_mcpdm_write(u16 reg, u32 val)
> +{
> +       __raw_writel(val, mcpdm->io_base + reg);
> +}
> +
> +static inline int omap_mcpdm_read(u16 reg)
> +{
> +       return __raw_readl(mcpdm->io_base + reg);
> +}
> +
> +void omap_mcpdm_reg_dump(void)
> +{
> +       dev_dbg(mcpdm->dev, "***********************\n");
> +       dev_dbg(mcpdm->dev, "IRQSTATUS_RAW:  0x%04x\n",
> +                       omap_mcpdm_read(MCPDM_IRQSTATUS_RAW));
> +       dev_dbg(mcpdm->dev, "IRQSTATUS:  0x%04x\n",
> +                       omap_mcpdm_read(MCPDM_IRQSTATUS));
> +       dev_dbg(mcpdm->dev, "IRQENABLE_SET:  0x%04x\n",
> +                       omap_mcpdm_read(MCPDM_IRQENABLE_SET));
> +       dev_dbg(mcpdm->dev, "IRQENABLE_CLR:  0x%04x\n",
> +                       omap_mcpdm_read(MCPDM_IRQENABLE_CLR));
> +       dev_dbg(mcpdm->dev, "IRQWAKE_EN: 0x%04x\n",
> +                       omap_mcpdm_read(MCPDM_IRQWAKE_EN));
> +       dev_dbg(mcpdm->dev, "DMAENABLE_SET: 0x%04x\n",
> +                       omap_mcpdm_read(MCPDM_DMAENABLE_SET));
> +       dev_dbg(mcpdm->dev, "DMAENABLE_CLR:  0x%04x\n",
> +                       omap_mcpdm_read(MCPDM_DMAENABLE_CLR));
> +       dev_dbg(mcpdm->dev, "DMAWAKEEN:  0x%04x\n",
> +                       omap_mcpdm_read(MCPDM_DMAWAKEEN));
> +       dev_dbg(mcpdm->dev, "CTRL:  0x%04x\n",
> +                       omap_mcpdm_read(MCPDM_CTRL));
> +       dev_dbg(mcpdm->dev, "DN_DATA:  0x%04x\n",
> +                       omap_mcpdm_read(MCPDM_DN_DATA));
> +       dev_dbg(mcpdm->dev, "UP_DATA: 0x%04x\n",
> +                       omap_mcpdm_read(MCPDM_UP_DATA));
> +       dev_dbg(mcpdm->dev, "FIFO_CTRL_DN: 0x%04x\n",
> +                       omap_mcpdm_read(MCPDM_FIFO_CTRL_DN));
> +       dev_dbg(mcpdm->dev, "FIFO_CTRL_UP:  0x%04x\n",
> +                       omap_mcpdm_read(MCPDM_FIFO_CTRL_UP));
> +       dev_dbg(mcpdm->dev, "DN_OFFSET:  0x%04x\n",
> +                       omap_mcpdm_read(MCPDM_DN_OFFSET));
> +       dev_dbg(mcpdm->dev, "***********************\n");
> +}
> +

static ?

> +/*
> + * Takes the McPDM module in and out of reset state.
> + * Uplink and downlink can be reset individually.
> + */
> +static void omap_mcpdm_reset(int links, int reset)
> +{
> +       int ctrl = omap_mcpdm_read(MCPDM_CTRL);
> +
> +       if (links & MCPDM_UPLINK) {
> +               if (reset)
> +                       ctrl |= SW_UP_RST;
> +               else
> +                       ctrl &= ~SW_UP_RST;
> +       }
> +
> +       if (links & MCPDM_DOWNLINK) {
> +               if (reset)
> +                       ctrl |= SW_DN_RST;
> +               else
> +                       ctrl &= ~SW_DN_RST;
> +       }
> +
> +       omap_mcpdm_write(MCPDM_CTRL, ctrl);
> +}
> +

Would it not be better to rename uplink/downlink as playback and capture
for ALSA ? If so, you could have an inline playback and capture version
of this function.

> +/*
> + * Enables the transfer through the PDM interface to/from the Phoenix
> + * codec by enabling the corresponding UP or DN channels.
> + */
> +void omap_mcpdm_start(int stream)
> +{
> +       int ctrl = omap_mcpdm_read(MCPDM_CTRL);
> +
> +       if (stream)
> +               ctrl |= mcpdm->up_channels;
> +       else
> +               ctrl |= mcpdm->dn_channels;
> +
> +       omap_mcpdm_write(MCPDM_CTRL, ctrl);
> +}
> +
> +/*
> + * Disables the transfer through the PDM interface to/from the Phoenix
> + * codec by disabling the corresponding UP or DN channels.
> + */
> +void omap_mcpdm_stop(int stream)
> +{
> +       int ctrl = omap_mcpdm_read(MCPDM_CTRL);
> +
> +       if (stream)
> +               ctrl &= ~mcpdm->up_channels;
> +       else
> +               ctrl &= ~mcpdm->dn_channels;
> +
> +       omap_mcpdm_write(MCPDM_CTRL, ctrl);
> +}
> +
> +/*
> + * Configures McPDM uplink for audio recording.
> + * This function should be called before omap_mcpdm_start.
> + */
> +int omap_mcpdm_set_uplink(struct omap_mcpdm_link *uplink)
> +{
> +       int irq_mask = 0;
> +       int ctrl;
> +
> +       if (!uplink)
> +               return -EINVAL;
> +
> +       mcpdm->uplink = uplink;
> +
> +       /* Enable irq request generation */
> +       irq_mask |= uplink->irq_mask & MCPDM_UPLINK_IRQ_MASK;
> +       omap_mcpdm_write(MCPDM_IRQENABLE_SET, irq_mask);
> +
> +       /* Configure uplink threshold */
> +       if (uplink->threshold > UP_THRES_MAX)
> +               uplink->threshold = UP_THRES_MAX;
> +
> +       omap_mcpdm_write(MCPDM_FIFO_CTRL_UP, uplink->threshold);
> +
> +       /* Configure DMA controller */
> +       omap_mcpdm_write(MCPDM_DMAENABLE_SET, DMA_UP_ENABLE);
> +
> +       /* Set pdm out format */
> +       ctrl = omap_mcpdm_read(MCPDM_CTRL);
> +       ctrl &= ~PDMOUTFORMAT;
> +       ctrl |= uplink->format & PDMOUTFORMAT;
> +
> +       /* Uplink channels */
> +       mcpdm->up_channels = uplink->channels & (PDM_UP_MASK | PDM_STATUS_MASK);
> +
> +       omap_mcpdm_write(MCPDM_CTRL, ctrl);
> +
> +       return 0;
> +}
> +
> +/*
> + * Configures McPDM downlink for audio playback.
> + * This function should be called before omap_mcpdm_start.
> + */
> +int omap_mcpdm_set_downlink(struct omap_mcpdm_link *downlink)
> +{
> +       int irq_mask = 0;
> +       int ctrl;
> +
> +       if (!downlink)
> +               return -EINVAL;
> +
> +       mcpdm->downlink = downlink;
> +
> +       /* Enable irq request generation */
> +       irq_mask |= downlink->irq_mask & MCPDM_DOWNLINK_IRQ_MASK;
> +       omap_mcpdm_write(MCPDM_IRQENABLE_SET, irq_mask);
> +
> +       /* Configure uplink threshold */
> +       if (downlink->threshold > DN_THRES_MAX)
> +               downlink->threshold = DN_THRES_MAX;
> +
> +       omap_mcpdm_write(MCPDM_FIFO_CTRL_DN, downlink->threshold);
> +
> +       /* Enable DMA request generation */
> +       omap_mcpdm_write(MCPDM_DMAENABLE_SET, DMA_DN_ENABLE);
> +
> +       /* Set pdm out format */
> +       ctrl = omap_mcpdm_read(MCPDM_CTRL);
> +       ctrl &= ~PDMOUTFORMAT;
> +       ctrl |= downlink->format & PDMOUTFORMAT;
> +
> +       /* Downlink channels */
> +       mcpdm->dn_channels = downlink->channels & (PDM_DN_MASK | PDM_CMD_MASK);
> +
> +       omap_mcpdm_write(MCPDM_CTRL, ctrl);
> +
> +       return 0;
> +}
> +]

It would be better if the naming here was more aligned with ALSA pcm
convention.

> +/*
> + * Cleans McPDM uplink configuration.
> + * This function should be called when the stream is closed.
> + */
> +int omap_mcpdm_clr_uplink(struct omap_mcpdm_link *uplink)
> +{
> +       int irq_mask = 0;
> +
> +       if (!uplink)
> +               return -EINVAL;
> +
> +       /* Disable irq request generation */
> +       irq_mask |= uplink->irq_mask & MCPDM_UPLINK_IRQ_MASK;
> +       omap_mcpdm_write(MCPDM_IRQENABLE_CLR, irq_mask);
> +
> +       /* Disable DMA request generation */
> +       omap_mcpdm_write(MCPDM_DMAENABLE_CLR, DMA_UP_ENABLE);
> +
> +       /* Clear Downlink channels */
> +       mcpdm->up_channels = 0;
> +
> +       mcpdm->uplink = NULL;
> +
> +       return 0;
> +}
> +
> +/*
> + * Cleans McPDM downlink configuration.
> + * This function should be called when the stream is closed.
> + */
> +int omap_mcpdm_clr_downlink(struct omap_mcpdm_link *downlink)
> +{
> +       int irq_mask = 0;
> +
> +       if (!downlink)
> +               return -EINVAL;
> +
> +       /* Disable irq request generation */
> +       irq_mask |= downlink->irq_mask & MCPDM_DOWNLINK_IRQ_MASK;
> +       omap_mcpdm_write(MCPDM_IRQENABLE_CLR, irq_mask);
> +
> +       /* Disable DMA request generation */
> +       omap_mcpdm_write(MCPDM_DMAENABLE_CLR, DMA_DN_ENABLE);
> +
> +       /* clear Downlink channels */
> +       mcpdm->dn_channels = 0;
> +
> +       mcpdm->downlink = NULL;
> +
> +       return 0;
> +}
> +
> +static irqreturn_t omap_mcpdm_irq_handler(int irq, void *dev_id)
> +{
> +       struct omap_mcpdm *mcpdm_irq = dev_id;
> +       int irq_status;
> +
> +       irq_status = omap_mcpdm_read(MCPDM_IRQSTATUS);
> +
> +       /* Acknowledge irq event */
> +       omap_mcpdm_write(MCPDM_IRQSTATUS, irq_status);
> +
> +       if (irq & MCPDM_DN_IRQ_FULL) {
> +               dev_err(mcpdm_irq->dev, "DN FIFO error %x\n", irq_status);
> +               omap_mcpdm_reset(MCPDM_DOWNLINK, 1);
> +               omap_mcpdm_set_downlink(mcpdm_irq->downlink);
> +               omap_mcpdm_reset(MCPDM_DOWNLINK, 0);
> +       }
> +
> +       if (irq & MCPDM_DN_IRQ_EMPTY) {
> +               dev_err(mcpdm_irq->dev, "DN FIFO error %x\n", irq_status);
> +               omap_mcpdm_reset(MCPDM_DOWNLINK, 1);
> +               omap_mcpdm_set_downlink(mcpdm_irq->downlink);
> +               omap_mcpdm_reset(MCPDM_DOWNLINK, 0);
> +       }
> +
> +       if (irq & MCPDM_DN_IRQ) {
> +               dev_dbg(mcpdm_irq->dev, "DN write request\n");
> +       }
> +
> +       if (irq & MCPDM_UP_IRQ_FULL) {
> +               dev_err(mcpdm_irq->dev, "UP FIFO error %x\n", irq_status);
> +               omap_mcpdm_reset(MCPDM_UPLINK, 1);
> +               omap_mcpdm_set_uplink(mcpdm_irq->uplink);
> +               omap_mcpdm_reset(MCPDM_UPLINK, 0);
> +       }
> +
> +       if (irq & MCPDM_UP_IRQ_EMPTY) {
> +               dev_err(mcpdm_irq->dev, "UP FIFO error %x\n", irq_status);
> +               omap_mcpdm_reset(MCPDM_UPLINK, 1);
> +               omap_mcpdm_set_uplink(mcpdm_irq->uplink);
> +               omap_mcpdm_reset(MCPDM_UPLINK, 0);
> +       }
> +
> +       if (irq & MCPDM_UP_IRQ) {
> +               dev_dbg(mcpdm_irq->dev, "UP write request\n");
> +       }
> +
> +       return IRQ_HANDLED;
> +}
> +
> +int omap_mcpdm_request(void)
> +{
> +       int ret;
> +
> +       clk_enable(mcpdm->clk);
> +
> +       spin_lock(&mcpdm->lock);
> +
> +       if (!mcpdm->free) {
> +               dev_err(mcpdm->dev, "McPDM interface is in use\n");
> +               spin_unlock(&mcpdm->lock);
> +               return -EBUSY;
> +       }
> +       mcpdm->free = 0;
> +
> +       spin_unlock(&mcpdm->lock);
> +
> +       /* Disable lines while request is ongoing */
> +       omap_mcpdm_write(MCPDM_CTRL, 0x00);
> +
> +       ret = request_irq(mcpdm->irq, omap_mcpdm_irq_handler,
> +                               0, "McPDM", (void *)mcpdm);
> +       if (ret) {
> +               dev_err(mcpdm->dev, "Request for McPDM IRQ failed\n");
> +               return ret;
> +       }
> +
> +       return 0;
> +}
> +
> +void omap_mcpdm_free(void)
> +{
> +       clk_disable(mcpdm->clk);
> +
> +       spin_lock(&mcpdm->lock);
> +       if (mcpdm->free) {
> +               dev_err(mcpdm->dev, "McPDM interface is already free\n");
> +               spin_unlock(&mcpdm->lock);
> +               return;
> +       }
> +       mcpdm->free = 1;
> +       spin_unlock(&mcpdm->lock);
> +
> +       free_irq(mcpdm->irq, (void *)mcpdm);
> +}
> +
> +int omap_mcpdm_set_offset(int offset1, int offset2)
> +{
> +       int offset;
> +
> +       if ((offset1 > DN_OFST_MAX) || (offset2 > DN_OFST_MAX))
> +               return -EINVAL;
> +
> +       offset = (offset1 << DN_OFST_RX1) | (offset2 << DN_OFST_RX2);
> +
> +       /* Enable/disable offset cancellation for downlink channel 1 */
> +       if (offset1)
> +               offset |= DN_OFST_RX1_EN;
> +       else
> +               offset &= ~DN_OFST_RX1_EN;
> +
> +       /* Enable/disable offset cancellation for downlink channel 2 */
> +       if (offset2)
> +               offset |= DN_OFST_RX2_EN;
> +       else
> +               offset &= ~DN_OFST_RX2_EN;
> +
> +       omap_mcpdm_write(MCPDM_DN_OFFSET, offset);
> +
> +       return 0;
> +}

What does this do and why is it not static ?

> +
> +static int __devinit omap_mcpdm_probe(struct platform_device *pdev)
> +{
> +       struct resource *res;
> +       int ret = 0;
> +
> +       mcpdm = kzalloc(sizeof(struct omap_mcpdm), GFP_KERNEL);
> +       if (!mcpdm) {
> +               ret = -ENOMEM;
> +               goto exit;
> +       }
> +
> +       res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> +       if (res == NULL) {
> +               dev_err(&pdev->dev, "no resource\n");
> +               goto exit;
> +       }
> +
> +       spin_lock_init(&mcpdm->lock);
> +       mcpdm->free = 1;
> +       mcpdm->io_base = ioremap(res->start, resource_size(res));
> +       if (!mcpdm->io_base) {
> +               ret = -ENOMEM;
> +               goto err_ioremap;
> +       }
> +
> +       mcpdm->irq = platform_get_irq(pdev, 0);
> +       mcpdm->dev = &pdev->dev;
> +       platform_set_drvdata(pdev, mcpdm);
> +
> +       return 0;
> +
> +err_clk:
> +       iounmap(mcpdm->io_base);
> +err_ioremap:
> +       kfree(mcpdm);
> +exit:
> +       return ret;
> +}
> +
> +static int __devexit omap_mcpdm_remove(struct platform_device *pdev)
> +{
> +       struct omap_mcpdm *mcpdm_ptr = platform_get_drvdata(pdev);
> +
> +       platform_set_drvdata(pdev, NULL);
> +
> +       clk_disable(mcpdm_ptr->clk);
> +       clk_put(mcpdm_ptr->clk);
> +
> +       iounmap(mcpdm_ptr->io_base);
> +
> +       mcpdm_ptr->clk = NULL;
> +       mcpdm_ptr->free = 0;
> +       mcpdm_ptr->dev = NULL;
> +
> +       kfree(mcpdm_ptr);
> +
> +       return 0;
> +}
> +
> +static struct platform_driver omap_mcpdm_driver = {
> +       .probe = omap_mcpdm_probe,
> +       .remove = __devexit_p(omap_mcpdm_remove),
> +       .driver = {
> +               .name = "omap-mcpdm",
> +       },
> +};
> +
> +static struct platform_device *omap_mcpdm_device;
> +
> +static int __init omap_mcpdm_init(void)
> +{
> +       int ret;
> +
> +       ret = platform_driver_register(&omap_mcpdm_driver);
> +       if (ret)
> +               goto error;
> +       return 0;
> +
> +error:
> +       return ret;
> +}
> +arch_initcall(omap_mcpdm_init);
> diff --git a/sound/soc/omap/mcpdm.h b/sound/soc/omap/mcpdm.h
> new file mode 100644
> index 0000000..e70f51c
> --- /dev/null
> +++ b/sound/soc/omap/mcpdm.h
> @@ -0,0 +1,152 @@
> +/*
> + * mcpdm.h -- Defines for McPDM driver
> + *
> + * Author: Jorge Eduardo Candelaria <x0107209@xxxxxx>
> + *
> + * 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
> + *
> + */
> +
> +/* McPDM registers */
> +
> +#define MCPDM_REVISION         0x00
> +#define MCPDM_SYSCONFIG                0x10
> +#define MCPDM_IRQSTATUS_RAW    0x24
> +#define MCPDM_IRQSTATUS                0x28
> +#define MCPDM_IRQENABLE_SET    0x2C
> +#define MCPDM_IRQENABLE_CLR    0x30
> +#define MCPDM_IRQWAKE_EN       0x34
> +#define MCPDM_DMAENABLE_SET    0x38
> +#define MCPDM_DMAENABLE_CLR    0x3C
> +#define MCPDM_DMAWAKEEN                0x40
> +#define MCPDM_CTRL             0x44
> +#define MCPDM_DN_DATA          0x48
> +#define MCPDM_UP_DATA          0x4C
> +#define MCPDM_FIFO_CTRL_DN     0x50
> +#define MCPDM_FIFO_CTRL_UP     0x54
> +#define MCPDM_DN_OFFSET                0x58
> +
> +/*
> + * MCPDM_IRQ bit fields
> + * IRQSTATUS_RAW, IRQSTATUS, IRQENABLE_SET, IRQENABLE_CLR
> + */
> +
> +#define MCPDM_DN_IRQ                   (1 << 0)
> +#define MCPDM_DN_IRQ_EMPTY             (1 << 1)
> +#define MCPDM_DN_IRQ_ALMST_EMPTY       (1 << 2)
> +#define MCPDM_DN_IRQ_FULL              (1 << 3)
> +
> +#define MCPDM_UP_IRQ                   (1 << 8)
> +#define MCPDM_UP_IRQ_EMPTY             (1 << 9)
> +#define MCPDM_UP_IRQ_ALMST_FULL                (1 << 10)
> +#define MCPDM_UP_IRQ_FULL              (1 << 11)
> +
> +#define MCPDM_DOWNLINK_IRQ_MASK                0x00F
> +#define MCPDM_UPLINK_IRQ_MASK          0xF00
> +
> +/*
> + * MCPDM_DMAENABLE bit fields
> + */
> +
> +#define DMA_DN_ENABLE          0x1
> +#define DMA_UP_ENABLE          0x2
> +
> +/*
> + * MCPDM_CTRL bit fields
> + */
> +
> +#define PDM_UP1_EN             0x0001
> +#define PDM_UP2_EN             0x0002
> +#define PDM_UP3_EN             0x0004
> +#define PDM_DN1_EN             0x0008
> +#define PDM_DN2_EN             0x0010
> +#define PDM_DN3_EN             0x0020
> +#define PDM_DN4_EN             0x0040
> +#define PDM_DN5_EN             0x0080
> +#define PDMOUTFORMAT           0x0100
> +#define CMD_INT                        0x0200
> +#define STATUS_INT             0x0400
> +#define SW_UP_RST              0x0800
> +#define SW_DN_RST              0x1000
> +#define PDM_UP_MASK            0x007
> +#define PDM_DN_MASK            0x0F8
> +#define PDM_CMD_MASK           0x200
> +#define PDM_STATUS_MASK                0x400
> +
> +
> +#define PDMOUTFORMAT_LJUST     (0 << 8)
> +#define PDMOUTFORMAT_RJUST     (1 << 8)
> +
> +/*
> + * MCPDM_FIFO_CTRL bit fields
> + */
> +
> +#define UP_THRES_MAX           0xF
> +#define DN_THRES_MAX           0xF
> +
> +/*
> + * MCPDM_DN_OFFSET bit fields
> + */
> +
> +#define DN_OFST_RX1_EN         0x0001
> +#define DN_OFST_RX2_EN         0x0100
> +
> +#define DN_OFST_RX1            1
> +#define DN_OFST_RX2            9
> +#define DN_OFST_MAX            0x1F
> +
> +#define MCPDM_UPLINK           1
> +#define MCPDM_DOWNLINK         2
> +
> +struct omap_mcpdm_link {
> +       int irq_mask;
> +       int threshold;
> +       int format;
> +       int channels;
> +};
> +
> +struct omap_mcpdm_platform_data {
> +       unsigned long phys_base;
> +       u16 irq;
> +};
> +
> +struct omap_mcpdm {
> +       struct device *dev;
> +       unsigned long phys_base;
> +       void __iomem *io_base;
> +       u8 free;
> +       int irq;
> +
> +       spinlock_t lock;
> +       struct omap_mcpdm_platform_data *pdata;
> +       struct clk *clk;
> +       struct omap_mcpdm_link *downlink;
> +       struct omap_mcpdm_link *uplink;
> +       struct completion irq_completion;
> +
> +       int dn_channels;
> +       int up_channels;
> +};
> +
> +extern void omap_mcpdm_reg_dump(void);
> +extern void omap_mcpdm_start(int stream);
> +extern void omap_mcpdm_stop(int stream);
> +extern int omap_mcpdm_set_uplink(struct omap_mcpdm_link *uplink);
> +extern int omap_mcpdm_set_downlink(struct omap_mcpdm_link *downlink);
> +extern int omap_mcpdm_clr_uplink(struct omap_mcpdm_link *uplink);
> +extern int omap_mcpdm_clr_downlink(struct omap_mcpdm_link *downlink);
> +extern int omap_mcpdm_request(void);
> +extern void omap_mcpdm_free(void);
> +extern int omap_mcpdm_set_offset(int offset1, int offset2);
> --
> 1.6.0.4
> _______________________________________________
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> http://mailman.alsa-project.org/mailman/listinfo/alsa-devel


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