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Diffstat (limited to 'sound/soc/omap/mcpdm.c')
-rw-r--r--sound/soc/omap/mcpdm.c470
1 files changed, 0 insertions, 470 deletions
diff --git a/sound/soc/omap/mcpdm.c b/sound/soc/omap/mcpdm.c
deleted file mode 100644
index 50e59194ad81..000000000000
--- a/sound/soc/omap/mcpdm.c
+++ /dev/null
@@ -1,470 +0,0 @@
-/*
- * mcpdm.c -- McPDM interface driver
- *
- * Author: Jorge Eduardo Candelaria <x0107209@ti.com>
- * 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/slab.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);
-}
-
-static 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");
-}
-
-/*
- * Takes the McPDM module in and out of reset state.
- * Uplink and downlink can be reset individually.
- */
-static void omap_mcpdm_reset_capture(int reset)
-{
- int ctrl = omap_mcpdm_read(MCPDM_CTRL);
-
- if (reset)
- ctrl |= SW_UP_RST;
- else
- ctrl &= ~SW_UP_RST;
-
- omap_mcpdm_write(MCPDM_CTRL, ctrl);
-}
-
-static void omap_mcpdm_reset_playback(int reset)
-{
- int ctrl = omap_mcpdm_read(MCPDM_CTRL);
-
- if (reset)
- ctrl |= SW_DN_RST;
- else
- ctrl &= ~SW_DN_RST;
-
- omap_mcpdm_write(MCPDM_CTRL, ctrl);
-}
-
-/*
- * 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_capture_open(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_playback_open(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;
-}
-
-/*
- * Cleans McPDM uplink configuration.
- * This function should be called when the stream is closed.
- */
-int omap_mcpdm_capture_close(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_playback_close(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_playback(1);
- omap_mcpdm_playback_open(mcpdm_irq->downlink);
- omap_mcpdm_reset_playback(0);
- }
-
- if (irq & MCPDM_DN_IRQ_EMPTY) {
- dev_err(mcpdm_irq->dev, "DN FIFO error %x\n", irq_status);
- omap_mcpdm_reset_playback(1);
- omap_mcpdm_playback_open(mcpdm_irq->downlink);
- omap_mcpdm_reset_playback(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_capture(1);
- omap_mcpdm_capture_open(mcpdm_irq->uplink);
- omap_mcpdm_reset_capture(0);
- }
-
- if (irq & MCPDM_UP_IRQ_EMPTY) {
- dev_err(mcpdm_irq->dev, "UP FIFO error %x\n", irq_status);
- omap_mcpdm_reset_capture(1);
- omap_mcpdm_capture_open(mcpdm_irq->uplink);
- omap_mcpdm_reset_capture(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);
- ret = -EBUSY;
- goto err;
- }
- 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");
- goto err;
- }
-
- return 0;
-
-err:
- clk_disable(mcpdm->clk);
- return ret;
-}
-
-void omap_mcpdm_free(void)
-{
- 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);
-
- clk_disable(mcpdm->clk);
-
- free_irq(mcpdm->irq, (void *)mcpdm);
-}
-
-/* Enable/disable DC offset cancelation for the analog
- * headset path (PDM channels 1 and 2).
- */
-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);
-
- /* offset cancellation for channel 1 */
- if (offset1)
- offset |= DN_OFST_RX1_EN;
- else
- offset &= ~DN_OFST_RX1_EN;
-
- /* offset cancellation for channel 2 */
- if (offset2)
- offset |= DN_OFST_RX2_EN;
- else
- offset &= ~DN_OFST_RX2_EN;
-
- omap_mcpdm_write(MCPDM_DN_OFFSET, offset);
-
- return 0;
-}
-
-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 err_resource;
- }
-
- 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_resource;
- }
-
- mcpdm->irq = platform_get_irq(pdev, 0);
-
- mcpdm->clk = clk_get(&pdev->dev, "pdm_ck");
- if (IS_ERR(mcpdm->clk)) {
- ret = PTR_ERR(mcpdm->clk);
- dev_err(&pdev->dev, "unable to get pdm_ck: %d\n", ret);
- goto err_clk;
- }
-
- mcpdm->dev = &pdev->dev;
- platform_set_drvdata(pdev, mcpdm);
-
- return 0;
-
-err_clk:
- iounmap(mcpdm->io_base);
-err_resource:
- kfree(mcpdm);
-exit:
- return ret;
-}
-
-int omap_mcpdm_remove(struct platform_device *pdev)
-{
- struct omap_mcpdm *mcpdm_ptr = platform_get_drvdata(pdev);
-
- platform_set_drvdata(pdev, NULL);
-
- 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;
-}
-