/*
- * mcpdm.c -- McPDM interface driver
+ * mcpdm.c -- McPDM interface driver
*
* Author: Jorge Eduardo Candelaria <x0107209@ti.com>
* Copyright (C) 2009 - Texas Instruments, Inc.
static inline void omap_mcpdm_write(u16 reg, u32 val)
{
- __raw_writel(val, mcpdm->io_base + reg);
+ __raw_writel(val, mcpdm->io_base + reg);
}
static inline int omap_mcpdm_read(u16 reg)
{
- return __raw_readl(mcpdm->io_base + 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");
+ 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 void omap_mcpdm_reset_capture(int reset)
{
- int ctrl = omap_mcpdm_read(MCPDM_CTRL);
+ int ctrl = omap_mcpdm_read(MCPDM_CTRL);
- if (reset)
- ctrl |= SW_UP_RST;
- else
- ctrl &= ~SW_UP_RST;
+ if (reset)
+ ctrl |= SW_UP_RST;
+ else
+ ctrl &= ~SW_UP_RST;
- omap_mcpdm_write(MCPDM_CTRL, ctrl);
+ omap_mcpdm_write(MCPDM_CTRL, ctrl);
}
static void omap_mcpdm_reset_playback(int reset)
{
- int ctrl = omap_mcpdm_read(MCPDM_CTRL);
+ int ctrl = omap_mcpdm_read(MCPDM_CTRL);
- if (reset)
- ctrl |= SW_DN_RST;
- else
- ctrl &= ~SW_DN_RST;
+ if (reset)
+ ctrl |= SW_DN_RST;
+ else
+ ctrl &= ~SW_DN_RST;
- omap_mcpdm_write(MCPDM_CTRL, ctrl);
+ omap_mcpdm_write(MCPDM_CTRL, ctrl);
}
/*
*/
void omap_mcpdm_start(int stream)
{
- int ctrl = omap_mcpdm_read(MCPDM_CTRL);
+ int ctrl = omap_mcpdm_read(MCPDM_CTRL);
- if (stream)
- ctrl |= mcpdm->up_channels;
- else
- ctrl |= mcpdm->dn_channels;
+ if (stream)
+ ctrl |= mcpdm->up_channels;
+ else
+ ctrl |= mcpdm->dn_channels;
- omap_mcpdm_write(MCPDM_CTRL, ctrl);
+ omap_mcpdm_write(MCPDM_CTRL, ctrl);
}
/*
*/
void omap_mcpdm_stop(int stream)
{
- int ctrl = omap_mcpdm_read(MCPDM_CTRL);
+ int ctrl = omap_mcpdm_read(MCPDM_CTRL);
- if (stream)
- ctrl &= ~mcpdm->up_channels;
- else
- ctrl &= ~mcpdm->dn_channels;
+ if (stream)
+ ctrl &= ~mcpdm->up_channels;
+ else
+ ctrl &= ~mcpdm->dn_channels;
- omap_mcpdm_write(MCPDM_CTRL, ctrl);
+ omap_mcpdm_write(MCPDM_CTRL, ctrl);
}
/*
*/
int omap_mcpdm_capture_open(struct omap_mcpdm_link *uplink)
{
- int irq_mask = 0;
- int ctrl;
+ int irq_mask = 0;
+ int ctrl;
- if (!uplink)
- return -EINVAL;
+ if (!uplink)
+ return -EINVAL;
- mcpdm->uplink = uplink;
+ mcpdm->uplink = uplink;
- /* Enable irq request generation */
- irq_mask |= uplink->irq_mask & MCPDM_UPLINK_IRQ_MASK;
- omap_mcpdm_write(MCPDM_IRQENABLE_SET, irq_mask);
+ /* 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;
+ /* Configure uplink threshold */
+ if (uplink->threshold > UP_THRES_MAX)
+ uplink->threshold = UP_THRES_MAX;
- omap_mcpdm_write(MCPDM_FIFO_CTRL_UP, uplink->threshold);
+ omap_mcpdm_write(MCPDM_FIFO_CTRL_UP, uplink->threshold);
- /* Configure DMA controller */
- omap_mcpdm_write(MCPDM_DMAENABLE_SET, DMA_UP_ENABLE);
+ /* 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;
+ /* 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);
+ /* Uplink channels */
+ mcpdm->up_channels = uplink->channels & (PDM_UP_MASK | PDM_STATUS_MASK);
- omap_mcpdm_write(MCPDM_CTRL, ctrl);
+ omap_mcpdm_write(MCPDM_CTRL, ctrl);
- return 0;
+ return 0;
}
/*
*/
int omap_mcpdm_playback_open(struct omap_mcpdm_link *downlink)
{
- int irq_mask = 0;
- int ctrl;
+ int irq_mask = 0;
+ int ctrl;
- if (!downlink)
- return -EINVAL;
+ if (!downlink)
+ return -EINVAL;
- mcpdm->downlink = downlink;
+ mcpdm->downlink = downlink;
- /* Enable irq request generation */
- irq_mask |= downlink->irq_mask & MCPDM_DOWNLINK_IRQ_MASK;
- omap_mcpdm_write(MCPDM_IRQENABLE_SET, irq_mask);
+ /* 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;
+ /* Configure uplink threshold */
+ if (downlink->threshold > DN_THRES_MAX)
+ downlink->threshold = DN_THRES_MAX;
- omap_mcpdm_write(MCPDM_FIFO_CTRL_DN, downlink->threshold);
+ omap_mcpdm_write(MCPDM_FIFO_CTRL_DN, downlink->threshold);
- /* Enable DMA request generation */
- omap_mcpdm_write(MCPDM_DMAENABLE_SET, DMA_DN_ENABLE);
+ /* 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;
+ /* 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);
+ /* Downlink channels */
+ mcpdm->dn_channels = downlink->channels & (PDM_DN_MASK | PDM_CMD_MASK);
- omap_mcpdm_write(MCPDM_CTRL, ctrl);
+ omap_mcpdm_write(MCPDM_CTRL, ctrl);
- return 0;
+ return 0;
}
/*
*/
int omap_mcpdm_capture_close(struct omap_mcpdm_link *uplink)
{
- int irq_mask = 0;
+ int irq_mask = 0;
- if (!uplink)
- return -EINVAL;
+ 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 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);
+ /* Disable DMA request generation */
+ omap_mcpdm_write(MCPDM_DMAENABLE_CLR, DMA_UP_ENABLE);
- /* Clear Downlink channels */
- mcpdm->up_channels = 0;
+ /* Clear Downlink channels */
+ mcpdm->up_channels = 0;
- mcpdm->uplink = NULL;
+ mcpdm->uplink = NULL;
- return 0;
+ return 0;
}
/*
*/
int omap_mcpdm_playback_close(struct omap_mcpdm_link *downlink)
{
- int irq_mask = 0;
+ int irq_mask = 0;
- if (!downlink)
- return -EINVAL;
+ 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 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);
+ /* Disable DMA request generation */
+ omap_mcpdm_write(MCPDM_DMAENABLE_CLR, DMA_DN_ENABLE);
- /* clear Downlink channels */
- mcpdm->dn_channels = 0;
+ /* clear Downlink channels */
+ mcpdm->dn_channels = 0;
- mcpdm->downlink = NULL;
+ mcpdm->downlink = NULL;
- return 0;
+ 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;
+ 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;
+ int ret;
- clk_enable(mcpdm->clk);
+ clk_enable(mcpdm->clk);
- spin_lock(&mcpdm->lock);
+ 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;
+ 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);
+ spin_unlock(&mcpdm->lock);
- /* Disable lines while request is ongoing */
- omap_mcpdm_write(MCPDM_CTRL, 0x00);
+ /* 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;
- }
+ 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;
+ return 0;
err:
- clk_disable(mcpdm->clk);
- return ret;
+ 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);
+ 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
*/
int omap_mcpdm_set_offset(int offset1, int offset2)
{
- int offset;
+ int offset;
- if ((offset1 > DN_OFST_MAX) || (offset2 > DN_OFST_MAX))
- return -EINVAL;
+ if ((offset1 > DN_OFST_MAX) || (offset2 > DN_OFST_MAX))
+ return -EINVAL;
- offset = (offset1 << DN_OFST_RX1) | (offset2 << DN_OFST_RX2);
+ 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 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;
+ /* 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);
+ omap_mcpdm_write(MCPDM_DN_OFFSET, offset);
- return 0;
+ return 0;
}
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 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;
+ 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);
+ iounmap(mcpdm->io_base);
err_resource:
- kfree(mcpdm);
+ kfree(mcpdm);
exit:
- return ret;
+ return ret;
}
static int __devexit omap_mcpdm_remove(struct platform_device *pdev)
{
- struct omap_mcpdm *mcpdm_ptr = platform_get_drvdata(pdev);
+ struct omap_mcpdm *mcpdm_ptr = platform_get_drvdata(pdev);
- platform_set_drvdata(pdev, NULL);
+ platform_set_drvdata(pdev, NULL);
- clk_put(mcpdm_ptr->clk);
+ clk_put(mcpdm_ptr->clk);
- iounmap(mcpdm_ptr->io_base);
+ iounmap(mcpdm_ptr->io_base);
- mcpdm_ptr->clk = NULL;
- mcpdm_ptr->free = 0;
- mcpdm_ptr->dev = NULL;
+ mcpdm_ptr->clk = NULL;
+ mcpdm_ptr->free = 0;
+ mcpdm_ptr->dev = NULL;
- kfree(mcpdm_ptr);
+ kfree(mcpdm_ptr);
- return 0;
+ return 0;
}
static struct platform_driver omap_mcpdm_driver = {
- .probe = omap_mcpdm_probe,
- .remove = __devexit_p(omap_mcpdm_remove),
- .driver = {
- .name = "omap-mcpdm",
- },
+ .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)
{
- return platform_driver_register(&omap_mcpdm_driver);
+ return platform_driver_register(&omap_mcpdm_driver);
}
arch_initcall(omap_mcpdm_init);
git.openpandora.org / pandora-kernel.git / blobdiff