V4L/DVB (6271): V4L: Add basic support for suspend/resume for saa7134

This adds support for suspend/resume for core of saa7134

Should fix bug#7220

Signed-off-by: Maxim Levitsky <maximlevitsky@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 144 insertions, 31 deletions

diff --git a/drivers/media/video/saa7134/saa7134-core.c b/drivers/media/video/saa7134/saa7134-core.c
index a1d986e..7f5df32 100644
--- a/drivers/media/video/saa7134/saa7134-core.c
+++ b/drivers/media/video/saa7134/saa7134-core.c
@@ -31,6 +31,7 @@
 #include <linux/delay.h>
 #include <linux/mutex.h>
 #include <linux/dma-mapping.h>
+#include <linux/pm.h>
 
 #include "saa7134-reg.h"
 #include "saa7134.h"
@@ -392,6 +393,38 @@ void saa7134_buffer_timeout(unsigned long data)
 	spin_unlock_irqrestore(&dev->slock,flags);
 }
 
+/* resends a current buffer in queue after resume */
+
+int saa7134_buffer_requeue(struct saa7134_dev *dev,
+			 struct saa7134_dmaqueue *q)
+{
+	struct saa7134_buf *buf , *next;
+	unsigned long flags;
+
+	spin_lock_irqsave(&dev->slock, flags);
+
+	buf  = q->curr;
+	next = buf;
+
+	dprintk("buffer_requeue\n");
+
+	if (!buf) {
+		spin_unlock_irqrestore(&dev->slock, flags);
+		return 0;
+	}
+
+	dprintk("buffer_requeue : resending active buffers \n");
+
+	if (!list_empty(&q->queue))
+		next = list_entry(q->queue.next, struct saa7134_buf,
+					  vb.queue);
+
+	buf->activate(dev, buf, next);
+	spin_unlock_irqrestore(&dev->slock, flags);
+
+	return 0;
+}
+
 /* ------------------------------------------------------------------ */
 
 int saa7134_set_dmabits(struct saa7134_dev *dev)
@@ -647,6 +680,39 @@ static irqreturn_t saa7134_irq(int irq, void *dev_id)
 /* ------------------------------------------------------------------ */
 
 /* early init (no i2c, no irq) */
+
+static int saa7134_hw_enable1(struct saa7134_dev *dev)
+{
+	/* RAM FIFO config */
+	saa_writel(SAA7134_FIFO_SIZE, 0x08070503);
+	saa_writel(SAA7134_THRESHOULD, 0x02020202);
+
+	/* enable audio + video processing */
+	saa_writel(SAA7134_MAIN_CTRL,
+			SAA7134_MAIN_CTRL_VPLLE |
+			SAA7134_MAIN_CTRL_APLLE |
+			SAA7134_MAIN_CTRL_EXOSC |
+			SAA7134_MAIN_CTRL_EVFE1 |
+			SAA7134_MAIN_CTRL_EVFE2 |
+			SAA7134_MAIN_CTRL_ESFE  |
+			SAA7134_MAIN_CTRL_EBDAC);
+
+	/*
+	* Initialize OSS _after_ enabling audio clock PLL and audio processing.
+	* OSS initialization writes to registers via the audio DSP; these
+	* writes will fail unless the audio clock has been started.  At worst,
+	* audio will not work.
+	*/
+
+	/* enable peripheral devices */
+	saa_writeb(SAA7134_SPECIAL_MODE, 0x01);
+
+	/* set vertical line numbering start (vbi needs this) */
+	saa_writeb(SAA7134_SOURCE_TIMING2, 0x20);
+
+	return 0;
+}
+
 static int saa7134_hwinit1(struct saa7134_dev *dev)
 {
 	dprintk("hwinit1\n");
@@ -663,44 +729,16 @@ static int saa7134_hwinit1(struct saa7134_dev *dev)
 		saa7134_ts_init1(dev);
 	saa7134_input_init1(dev);
 
-	/* RAM FIFO config */
-	saa_writel(SAA7134_FIFO_SIZE, 0x08070503);
-	saa_writel(SAA7134_THRESHOULD,0x02020202);
-
-	/* enable audio + video processing */
-	saa_writel(SAA7134_MAIN_CTRL,
-		   SAA7134_MAIN_CTRL_VPLLE |
-		   SAA7134_MAIN_CTRL_APLLE |
-		   SAA7134_MAIN_CTRL_EXOSC |
-		   SAA7134_MAIN_CTRL_EVFE1 |
-		   SAA7134_MAIN_CTRL_EVFE2 |
-		   SAA7134_MAIN_CTRL_ESFE  |
-		   SAA7134_MAIN_CTRL_EBDAC);
-
-	/*
-	 * Initialize OSS _after_ enabling audio clock PLL and audio processing.
-	 * OSS initialization writes to registers via the audio DSP; these
-	 * writes will fail unless the audio clock has been started.  At worst,
-	 * audio will not work.
-	 */
-
-	/* enable peripheral devices */
-	saa_writeb(SAA7134_SPECIAL_MODE, 0x01);
-
-	/* set vertical line numbering start (vbi needs this) */
-	saa_writeb(SAA7134_SOURCE_TIMING2, 0x20);
+	saa7134_hw_enable1(dev);
 
 	return 0;
 }
 
 /* late init (with i2c + irq) */
-static int saa7134_hwinit2(struct saa7134_dev *dev)
+static int saa7134_hw_enable2(struct saa7134_dev *dev)
 {
-	unsigned int irq2_mask;
-	dprintk("hwinit2\n");
 
-	saa7134_video_init2(dev);
-	saa7134_tvaudio_init2(dev);
+	unsigned int irq2_mask;
 
 	/* enable IRQ's */
 	irq2_mask =
@@ -726,6 +764,20 @@ static int saa7134_hwinit2(struct saa7134_dev *dev)
 	return 0;
 }
 
+static int saa7134_hwinit2(struct saa7134_dev *dev)
+{
+
+	dprintk("hwinit2\n");
+
+	saa7134_video_init2(dev);
+	saa7134_tvaudio_init2(dev);
+
+	saa7134_hw_enable2(dev);
+
+	return 0;
+}
+
+
 /* shutdown */
 static int saa7134_hwfini(struct saa7134_dev *dev)
 {
@@ -1118,6 +1170,65 @@ static void __devexit saa7134_finidev(struct pci_dev *pci_dev)
 	kfree(dev);
 }
 
+static int saa7134_suspend(struct pci_dev *pci_dev , pm_message_t state)
+{
+
+	/* Disable card's IRQs to prevent it from resuming computer */
+
+	struct saa7134_dev *dev = pci_get_drvdata(pci_dev);
+
+	saa_writel(SAA7134_IRQ1, 0);
+	saa_writel(SAA7134_IRQ2, 0);
+
+
+	pci_set_power_state(pci_dev, pci_choose_state(pci_dev, state));
+	pci_save_state(pci_dev);
+
+    return 0;
+}
+
+static int saa7134_resume(struct pci_dev *pci_dev)
+{
+
+	struct saa7134_dev *dev = pci_get_drvdata(pci_dev);
+
+	pci_restore_state(pci_dev);
+	pci_set_power_state(pci_dev, PCI_D0);
+
+	/* Do things that are done in saa7134_initdev ,
+		except of initializing memory structures.*/
+
+	saa7134_board_init1(dev);
+
+	if (saa7134_boards[dev->board].video_out)
+		saa7134_videoport_init(dev);
+
+	if (card_has_mpeg(dev))
+		saa7134_ts_init_hw(dev);
+
+	saa7134_hw_enable1(dev);
+
+	saa7134_set_decoder(dev);
+
+	saa7134_i2c_call_clients(dev, VIDIOC_S_STD, &dev->tvnorm->id);
+
+	saa7134_board_init2(dev);
+	saa7134_hw_enable2(dev);
+
+	dev->force_mute_update = 1;
+	saa7134_tvaudio_setmute(dev);
+	dev->force_mute_update = 0;
+	saa7134_tvaudio_setvolume(dev, dev->ctl_volume);
+	saa7134_enable_i2s(dev);
+
+	/*recapture unfinished buffer(s)*/
+	saa7134_buffer_requeue(dev, &dev->video_q);
+	saa7134_buffer_requeue(dev, &dev->vbi_q);
+	saa7134_buffer_requeue(dev, &dev->ts_q);
+
+	return 0;
+}
+
 /* ----------------------------------------------------------- */
 
 int saa7134_ts_register(struct saa7134_mpeg_ops *ops)
@@ -1159,6 +1270,8 @@ static struct pci_driver saa7134_pci_driver = {
 	.id_table = saa7134_pci_tbl,
 	.probe    = saa7134_initdev,
 	.remove   = __devexit_p(saa7134_finidev),
+	.suspend  = saa7134_suspend,
+	.resume   = saa7134_resume
 };
 
 static int saa7134_init(void)