X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=drivers%2Fmedia%2Fcommon%2Fsaa7146_core.c;h=8cdd4d265ffa235bb69a57f7a57679b6e0827e72;hb=43bc926fffd92024b46cafaf7350d669ba9ca884;hp=369d949fded45d8e1e60f1288cb00f3e8f433a79;hpb=5273a3df6485dc2ad6aa7ddd441b9a21970f003b;p=linux-2.6.git

diff --git a/drivers/media/common/saa7146_core.c b/drivers/media/common/saa7146_core.c
index 369d949fd..8cdd4d265 100644
--- a/drivers/media/common/saa7146_core.c
+++ b/drivers/media/common/saa7146_core.c
@@ -20,16 +20,14 @@
 
 #include <media/saa7146.h>
 
-/* global variables */
-struct list_head saa7146_devices;
-struct semaphore saa7146_devices_lock;
+LIST_HEAD(saa7146_devices);
+DEFINE_MUTEX(saa7146_devices_lock);
 
-static int initialized = 0;
-int saa7146_num = 0;
+static int saa7146_num;
 
-unsigned int saa7146_debug = 0;
+unsigned int saa7146_debug;
 
-MODULE_PARM(saa7146_debug,"i");
+module_param(saa7146_debug, int, 0644);
 MODULE_PARM_DESC(saa7146_debug, "debug level (default: 0)");
 
 #if 0
@@ -48,50 +46,51 @@ static void dump_registers(struct saa7146_dev* dev)
  * gpio and debi helper functions
  ****************************************************************************/
 
-/* write "data" to the gpio-pin "pin" */
-void saa7146_set_gpio(struct saa7146_dev *dev, u8 pin, u8 data)
+void saa7146_setgpio(struct saa7146_dev *dev, int port, u32 data)
 {
 	u32 value = 0;
 
-	/* sanity check */
-	if(pin > 3)
-		return;
-
-	/* read old register contents */
-	value = saa7146_read(dev, GPIO_CTRL );
-	
-	value &= ~(0xff << (8*pin));
-	value |= (data << (8*pin));
+	BUG_ON(port > 3);
 
+	value = saa7146_read(dev, GPIO_CTRL);
+	value &= ~(0xff << (8*port));
+	value |= (data << (8*port));
 	saa7146_write(dev, GPIO_CTRL, value);
 }
 
 /* This DEBI code is based on the saa7146 Stradis driver by Nathan Laredo */
-int saa7146_wait_for_debi_done(struct saa7146_dev *dev)
+int saa7146_wait_for_debi_done(struct saa7146_dev *dev, int nobusyloop)
 {
 	unsigned long start;
+	int err;
 
 	/* wait for registers to be programmed */
 	start = jiffies;
 	while (1) {
-                if (saa7146_read(dev, MC2) & 2)
-                        break;
-		if (time_after(jiffies, start + HZ/20)) {
+		err = time_after(jiffies, start + HZ/20);
+		if (saa7146_read(dev, MC2) & 2)
+			break;
+		if (err) {
 			DEB_S(("timed out while waiting for registers getting programmed\n"));
 			return -ETIMEDOUT;
 		}
+		if (nobusyloop)
+			msleep(1);
 	}
 
 	/* wait for transfer to complete */
 	start = jiffies;
 	while (1) {
+		err = time_after(jiffies, start + HZ/4);
 		if (!(saa7146_read(dev, PSR) & SPCI_DEBI_S))
 			break;
 		saa7146_read(dev, MC2);
-		if (time_after(jiffies, start + HZ/4)) {
+		if (err) {
 			DEB_S(("timed out while waiting for transfer completion\n"));
 			return -ETIMEDOUT;
 		}
+		if (nobusyloop)
+			msleep(1);
 	}
 
 	return 0;
@@ -101,7 +100,7 @@ int saa7146_wait_for_debi_done(struct saa7146_dev *dev)
  * general helper functions
  ****************************************************************************/
 
-/* this is videobuf_vmalloc_to_sg() from video-buf.c 
+/* this is videobuf_vmalloc_to_sg() from video-buf.c
    make sure virt has been allocated with vmalloc_32(), otherwise the BUG()
    may be triggered on highmem machines */
 static struct scatterlist* vmalloc_to_sg(unsigned char *virt, int nr_pages)
@@ -110,21 +109,19 @@ static struct scatterlist* vmalloc_to_sg(unsigned char *virt, int nr_pages)
 	struct page *pg;
 	int i;
 
-	sglist = kmalloc(sizeof(struct scatterlist)*nr_pages, GFP_KERNEL);
+	sglist = kcalloc(nr_pages, sizeof(struct scatterlist), GFP_KERNEL);
 	if (NULL == sglist)
 		return NULL;
-	memset(sglist,0,sizeof(struct scatterlist)*nr_pages);
 	for (i = 0; i < nr_pages; i++, virt += PAGE_SIZE) {
 		pg = vmalloc_to_page(virt);
 		if (NULL == pg)
 			goto err;
-		if (PageHighMem(pg))
-			BUG();
+		BUG_ON(PageHighMem(pg));
 		sglist[i].page   = pg;
 		sglist[i].length = PAGE_SIZE;
 	}
 	return sglist;
-	
+
  err:
 	kfree(sglist);
 	return NULL;
@@ -133,8 +130,6 @@ static struct scatterlist* vmalloc_to_sg(unsigned char *virt, int nr_pages)
 /********************************************************************************/
 /* common page table functions */
 
-#define SAA7146_PGTABLE_SIZE 4096
-
 char *saa7146_vmalloc_build_pgtable(struct pci_dev *pci, long length, struct saa7146_pgtable *pt)
 {
 	int pages = (length+PAGE_SIZE-1)/PAGE_SIZE;
@@ -156,7 +151,7 @@ char *saa7146_vmalloc_build_pgtable(struct pci_dev *pci, long length, struct saa
 		vfree(mem);
 		return NULL;
 	}
-	
+
 	slen = pci_map_sg(pci,pt->slist,pages,PCI_DMA_FROMDEVICE);
 	if (0 != saa7146_pgtable_build_single(pci, pt, pt->slist, slen)) {
 		return NULL;
@@ -171,22 +166,20 @@ void saa7146_pgtable_free(struct pci_dev *pci, struct saa7146_pgtable *pt)
 		return;
 	pci_free_consistent(pci, pt->size, pt->cpu, pt->dma);
 	pt->cpu = NULL;
-	if (NULL != pt->slist) {
-		kfree(pt->slist);
-		pt->slist = NULL;
-	}
+	kfree(pt->slist);
+	pt->slist = NULL;
 }
 
 int saa7146_pgtable_alloc(struct pci_dev *pci, struct saa7146_pgtable *pt)
 {
-        u32          *cpu;
-        dma_addr_t   dma_addr;
+	u32          *cpu;
+	dma_addr_t   dma_addr;
 
-	cpu = pci_alloc_consistent(pci, SAA7146_PGTABLE_SIZE, &dma_addr);
+	cpu = pci_alloc_consistent(pci, PAGE_SIZE, &dma_addr);
 	if (NULL == cpu) {
 		return -ENOMEM;
 	}
-	pt->size = SAA7146_PGTABLE_SIZE;
+	pt->size = PAGE_SIZE;
 	pt->cpu  = cpu;
 	pt->dma  = dma_addr;
 
@@ -196,17 +189,13 @@ int saa7146_pgtable_alloc(struct pci_dev *pci, struct saa7146_pgtable *pt)
 int saa7146_pgtable_build_single(struct pci_dev *pci, struct saa7146_pgtable *pt,
 	struct scatterlist *list, int sglen  )
 {
-	u32   *ptr, fill;
+	u32 *ptr, fill;
 	int nr_pages = 0;
-	int   i,p;
+	int i,p;
 
-	BUG_ON( 0 == sglen);
+	BUG_ON(0 == sglen);
+	BUG_ON(list->offset > PAGE_SIZE);
 
-	if (list->offset > PAGE_SIZE) {
-		DEB_D(("offset > PAGE_SIZE. this should not happen."));
-		return -EINVAL;
-	}
-	
 	/* if we have a user buffer, the first page may not be
 	   aligned to a page boundary. */
 	pt->offset = list->offset;
@@ -217,7 +206,7 @@ int saa7146_pgtable_build_single(struct pci_dev *pci, struct saa7146_pgtable *pt
 		printk("i:%d, adr:0x%08x, len:%d, offset:%d\n", i,sg_dma_address(list), sg_dma_len(list), list->offset);
 */
 		for (p = 0; p * 4096 < list->length; p++, ptr++) {
-			*ptr = sg_dma_address(list) + p * 4096;
+			*ptr = cpu_to_le32(sg_dma_address(list) + p * 4096);
 			nr_pages++;
 		}
 	}
@@ -239,25 +228,11 @@ int saa7146_pgtable_build_single(struct pci_dev *pci, struct saa7146_pgtable *pt
 	return 0;
 }
 
-/********************************************************************************/
-/* gpio functions */
-
-void saa7146_setgpio(struct saa7146_dev *dev, int port, u32 data)
-{
-	u32 val = 0;
-
-        val=saa7146_read(dev,GPIO_CTRL);
-        val&=~(0xff << (8*(port)));
-        val|=(data)<<(8*(port));
-        saa7146_write(dev, GPIO_CTRL, val);
-}
-
 /********************************************************************************/
 /* interrupt handler */
-
 static irqreturn_t interrupt_hw(int irq, void *dev_id, struct pt_regs *regs)
 {
-	struct saa7146_dev *dev = (struct saa7146_dev*)dev_id;
+	struct saa7146_dev *dev = dev_id;
 	u32 isr = 0;
 
 	/* read out the interrupt status register */
@@ -295,7 +270,7 @@ static irqreturn_t interrupt_hw(int irq, void *dev_id, struct pt_regs *regs)
 	if (0 != (isr & (MASK_16|MASK_17))) {
 		u32 status = saa7146_read(dev, I2C_STATUS);
 		if( (0x3 == (status & 0x3)) || (0 == (status & 0x1)) ) {
-			IER_DISABLE(dev, MASK_16|MASK_17);
+			SAA7146_IER_DISABLE(dev, MASK_16|MASK_17);
 			/* only wake up if we expect something */
 			if( 0 != dev->i2c_op ) {
 				u32 psr = (saa7146_read(dev, PSR) >> 16) & 0x2;
@@ -314,7 +289,7 @@ static irqreturn_t interrupt_hw(int irq, void *dev_id, struct pt_regs *regs)
 	if( 0 != isr ) {
 		ERR(("warning: interrupt enabled, but not handled properly.(0x%08x)\n",isr));
 		ERR(("disabling interrupt source(s)!\n"));
-		IER_DISABLE(dev,isr);
+		SAA7146_IER_DISABLE(dev,isr);
 	}
 	return IRQ_HANDLED;
 }
@@ -324,55 +299,51 @@ static irqreturn_t interrupt_hw(int irq, void *dev_id, struct pt_regs *regs)
 
 static int saa7146_init_one(struct pci_dev *pci, const struct pci_device_id *ent)
 {
-	unsigned long adr = 0, len = 0;
-	struct saa7146_dev* dev = kmalloc (sizeof(struct saa7146_dev),GFP_KERNEL);
-	
 	struct saa7146_pci_extension_data *pci_ext = (struct saa7146_pci_extension_data *)ent->driver_data;
-	struct saa7146_extension* ext = pci_ext->ext;
-	int err = 0;
-	
-	if (!(dev = kmalloc (sizeof(struct saa7146_dev),GFP_KERNEL))) {
-		ERR(("out of memory.\n"));
-		return -ENOMEM;
-	}
+	struct saa7146_extension *ext = pci_ext->ext;
+	struct saa7146_dev *dev;
+	int err = -ENOMEM;
 
 	/* clear out mem for sure */
-	memset(dev, 0x0, sizeof(struct saa7146_dev));
+	dev = kzalloc(sizeof(struct saa7146_dev), GFP_KERNEL);
+	if (!dev) {
+		ERR(("out of memory.\n"));
+		goto out;
+	}
 
 	DEB_EE(("pci:%p\n",pci));
 
-	if (pci_enable_device(pci)) {
+	err = pci_enable_device(pci);
+	if (err < 0) {
 		ERR(("pci_enable_device() failed.\n"));
-		err = -EIO;
-		goto pci_error;
+		goto err_free;
 	}
 
 	/* enable bus-mastering */
 	pci_set_master(pci);
 
 	dev->pci = pci;
+
 	/* get chip-revision; this is needed to enable bug-fixes */
-	if( 0 > pci_read_config_dword(dev->pci, PCI_CLASS_REVISION, &dev->revision)) {
+	err = pci_read_config_dword(pci, PCI_CLASS_REVISION, &dev->revision);
+	if (err < 0) {
 		ERR(("pci_read_config_dword() failed.\n"));
-		err = -ENODEV;
-		goto pci_error;
+		goto err_disable;
 	}
 	dev->revision &= 0xf;
 
 	/* remap the memory from virtual to physical adress */
-	adr = pci_resource_start(pci,0);
-	len = pci_resource_len(pci,0);
 
-	if (!request_mem_region(pci_resource_start(pci,0), pci_resource_len(pci,0), "saa7146")) {
-		ERR(("request_mem_region() failed.\n"));
-		err = -ENODEV;
-		goto pci_error;
-	}
+	err = pci_request_region(pci, 0, "saa7146");
+	if (err < 0)
+		goto err_disable;
 
-	if (!(dev->mem = ioremap(adr,len))) {
+	dev->mem = ioremap(pci_resource_start(pci, 0),
+			   pci_resource_len(pci, 0));
+	if (!dev->mem) {
 		ERR(("ioremap() failed.\n"));
 		err = -ENODEV;
-		goto ioremap_error;
+		goto err_release;
 	}
 
 	/* we don't do a master reset here anymore, it screws up
@@ -385,77 +356,75 @@ static int saa7146_init_one(struct pci_dev *pci, const struct pci_device_id *ent
 	/* disable all irqs */
 	saa7146_write(dev, IER, 0);
 
-	/* shut down all dma transfers */
-	saa7146_write(dev, MC1, 0x00ff0000);
+	/* shut down all dma transfers and rps tasks */
+	saa7146_write(dev, MC1, 0x30ff0000);
 
 	/* clear out any rps-signals pending */
 	saa7146_write(dev, MC2, 0xf8000000);
 
 	/* request an interrupt for the saa7146 */
-	if (request_irq(dev->pci->irq, interrupt_hw, SA_SHIRQ | SA_INTERRUPT,
-			dev->name, dev))
-	{
+	err = request_irq(pci->irq, interrupt_hw, SA_SHIRQ | SA_INTERRUPT,
+			  dev->name, dev);
+	if (err < 0) {
 		ERR(("request_irq() failed.\n"));
-		err = -ENODEV;
-		goto irq_error;
+		goto err_unmap;
 	}
 
+	err = -ENOMEM;
+
 	/* get memory for various stuff */
-	dev->d_rps0.cpu_addr = pci_alloc_consistent(dev->pci, SAA7146_RPS_MEM, &dev->d_rps0.dma_handle);	
-	if( NULL == dev->d_rps0.cpu_addr ) {
-		err = -ENOMEM;
-		goto kmalloc_error_1;
-	}
+	dev->d_rps0.cpu_addr = pci_alloc_consistent(pci, SAA7146_RPS_MEM,
+						    &dev->d_rps0.dma_handle);
+	if (!dev->d_rps0.cpu_addr)
+		goto err_free_irq;
 	memset(dev->d_rps0.cpu_addr, 0x0, SAA7146_RPS_MEM);
 
-	dev->d_rps1.cpu_addr = pci_alloc_consistent(dev->pci, SAA7146_RPS_MEM, &dev->d_rps1.dma_handle);	
-	if( NULL == dev->d_rps1.cpu_addr ) {
-		err = -ENOMEM;
-		goto kmalloc_error_2;
-	}
+	dev->d_rps1.cpu_addr = pci_alloc_consistent(pci, SAA7146_RPS_MEM,
+						    &dev->d_rps1.dma_handle);
+	if (!dev->d_rps1.cpu_addr)
+		goto err_free_rps0;
 	memset(dev->d_rps1.cpu_addr, 0x0, SAA7146_RPS_MEM);
 
-	dev->d_i2c.cpu_addr = pci_alloc_consistent(dev->pci, SAA7146_RPS_MEM, &dev->d_i2c.dma_handle);	
-	if( NULL == dev->d_i2c.cpu_addr ) {
-		err = -ENOMEM;
-		goto kmalloc_error_3;
-	}
+	dev->d_i2c.cpu_addr = pci_alloc_consistent(pci, SAA7146_RPS_MEM,
+						   &dev->d_i2c.dma_handle);
+	if (!dev->d_i2c.cpu_addr)
+		goto err_free_rps1;
 	memset(dev->d_i2c.cpu_addr, 0x0, SAA7146_RPS_MEM);
 
 	/* the rest + print status message */
 
 	/* create a nice device name */
-	sprintf(&dev->name[0], "saa7146 (%d)",saa7146_num);
+	sprintf(dev->name, "saa7146 (%d)", saa7146_num);
 
-	INFO(("found saa7146 @ mem %p (revision %d, irq %d) (0x%04x,0x%04x).\n", dev->mem, dev->revision,dev->pci->irq,dev->pci->subsystem_vendor,dev->pci->subsystem_device));
+	INFO(("found saa7146 @ mem %p (revision %d, irq %d) (0x%04x,0x%04x).\n", dev->mem, dev->revision, pci->irq, pci->subsystem_vendor, pci->subsystem_device));
 	dev->ext = ext;
 
-	pci_set_drvdata(pci,dev);
+	pci_set_drvdata(pci, dev);
 
-        init_MUTEX(&dev->lock);
-	dev->int_slock = SPIN_LOCK_UNLOCKED;
-	dev->slock = SPIN_LOCK_UNLOCKED;
+	mutex_init(&dev->lock);
+	spin_lock_init(&dev->int_slock);
+	spin_lock_init(&dev->slock);
 
-	init_MUTEX(&dev->i2c_lock);
+	mutex_init(&dev->i2c_lock);
 
 	dev->module = THIS_MODULE;
 	init_waitqueue_head(&dev->i2c_wq);
 
 	/* set some sane pci arbitrition values */
-	saa7146_write(dev, PCI_BT_V1, 0x1c00101f); 
+	saa7146_write(dev, PCI_BT_V1, 0x1c00101f);
 
-	if( 0 != ext->probe) {
-		if( 0 != ext->probe(dev) ) {
-			DEB_D(("ext->probe() failed for %p. skipping device.\n",dev));
-			err = -ENODEV;
-			goto probe_error;
-		}
+	/* TODO: use the status code of the callback */
+
+	err = -ENODEV;
+
+	if (ext->probe && ext->probe(dev)) {
+		DEB_D(("ext->probe() failed for %p. skipping device.\n",dev));
+		goto err_free_i2c;
 	}
 
-	if( 0 != ext->attach(dev,pci_ext) ) {
+	if (ext->attach(dev, pci_ext)) {
 		DEB_D(("ext->attach() failed for %p. skipping device.\n",dev));
-			err = -ENODEV;
-			goto attach_error;
+		goto err_unprobe;
 	}
 
 	INIT_LIST_HEAD(&dev->item);
@@ -463,30 +432,46 @@ static int saa7146_init_one(struct pci_dev *pci, const struct pci_device_id *ent
 	saa7146_num++;
 
 	err = 0;
-	goto out;
-attach_error:
-probe_error:
-	pci_set_drvdata(pci,NULL);
-	pci_free_consistent(dev->pci, SAA7146_RPS_MEM, dev->d_i2c.cpu_addr, dev->d_i2c.dma_handle);
-kmalloc_error_3:
-	pci_free_consistent(dev->pci, SAA7146_RPS_MEM, dev->d_rps1.cpu_addr, dev->d_rps1.dma_handle);
-kmalloc_error_2:
-	pci_free_consistent(dev->pci, SAA7146_RPS_MEM, dev->d_rps0.cpu_addr, dev->d_rps0.dma_handle);
-kmalloc_error_1:
-	free_irq(dev->pci->irq, (void *)dev);
-irq_error:
-	iounmap(dev->mem);
-ioremap_error:
-        release_mem_region(adr,len);
-pci_error:
-	kfree(dev);
 out:
 	return err;
+
+err_unprobe:
+	pci_set_drvdata(pci, NULL);
+err_free_i2c:
+	pci_free_consistent(pci, SAA7146_RPS_MEM, dev->d_i2c.cpu_addr,
+			    dev->d_i2c.dma_handle);
+err_free_rps1:
+	pci_free_consistent(pci, SAA7146_RPS_MEM, dev->d_rps1.cpu_addr,
+			    dev->d_rps1.dma_handle);
+err_free_rps0:
+	pci_free_consistent(pci, SAA7146_RPS_MEM, dev->d_rps0.cpu_addr,
+			    dev->d_rps0.dma_handle);
+err_free_irq:
+	free_irq(pci->irq, (void *)dev);
+err_unmap:
+	iounmap(dev->mem);
+err_release:
+	pci_release_region(pci, 0);
+err_disable:
+	pci_disable_device(pci);
+err_free:
+	kfree(dev);
+	goto out;
 }
 
 static void saa7146_remove_one(struct pci_dev *pdev)
 {
-	struct saa7146_dev* dev = (struct saa7146_dev*) pci_get_drvdata(pdev);
+	struct saa7146_dev* dev = pci_get_drvdata(pdev);
+	struct {
+		void *addr;
+		dma_addr_t dma;
+	} dev_map[] = {
+		{ dev->d_i2c.cpu_addr, dev->d_i2c.dma_handle },
+		{ dev->d_rps1.cpu_addr, dev->d_rps1.dma_handle },
+		{ dev->d_rps0.cpu_addr, dev->d_rps0.dma_handle },
+		{ NULL, 0 }
+	}, *p;
+
 	DEB_EE(("dev:%p\n",dev));
 
 	dev->ext->detach(dev);
@@ -497,17 +482,15 @@ static void saa7146_remove_one(struct pci_dev *pdev)
 	/* disable all irqs, release irq-routine */
 	saa7146_write(dev, IER, 0);
 
-	free_irq(dev->pci->irq, (void *)dev);
+	free_irq(pdev->irq, dev);
 
-	/* free kernel memory */
-	pci_free_consistent(dev->pci, SAA7146_RPS_MEM, dev->d_i2c.cpu_addr, dev->d_i2c.dma_handle);
-	pci_free_consistent(dev->pci, SAA7146_RPS_MEM, dev->d_rps1.cpu_addr, dev->d_rps1.dma_handle);
-	pci_free_consistent(dev->pci, SAA7146_RPS_MEM, dev->d_rps0.cpu_addr, dev->d_rps0.dma_handle);
+	for (p = dev_map; p->addr; p++)
+		pci_free_consistent(pdev, SAA7146_RPS_MEM, p->addr, p->dma);
 
 	iounmap(dev->mem);
-	release_mem_region(pci_resource_start(dev->pci,0), pci_resource_len(dev->pci,0));
-
+	pci_release_region(pdev, 0);
 	list_del(&dev->item);
+	pci_disable_device(pdev);
 	kfree(dev);
 
 	saa7146_num--;
@@ -520,19 +503,13 @@ int saa7146_register_extension(struct saa7146_extension* ext)
 {
 	DEB_EE(("ext:%p\n",ext));
 
-	if( 0 == initialized ) {
-		INIT_LIST_HEAD(&saa7146_devices);
-		init_MUTEX(&saa7146_devices_lock);
-		initialized = 1;
-	}
-
 	ext->driver.name = ext->name;
 	ext->driver.id_table = ext->pci_tbl;
 	ext->driver.probe = saa7146_init_one;
 	ext->driver.remove = saa7146_remove_one;
 
 	printk("saa7146: register extension '%s'.\n",ext->name);
-	return pci_module_init(&ext->driver);
+	return pci_register_driver(&ext->driver);
 }
 
 int saa7146_unregister_extension(struct saa7146_extension* ext)
@@ -543,23 +520,6 @@ int saa7146_unregister_extension(struct saa7146_extension* ext)
 	return 0;
 }
 
-static int __init saa7146_init_module(void)
-{
-	if( 0 == initialized ) {
-		INIT_LIST_HEAD(&saa7146_devices);
-		init_MUTEX(&saa7146_devices_lock);
-		initialized = 1;
-	}
-	return 0;
-}
-
-static void __exit saa7146_cleanup_module(void)
-{
-}
-
-module_init(saa7146_init_module);
-module_exit(saa7146_cleanup_module);
-
 EXPORT_SYMBOL_GPL(saa7146_register_extension);
 EXPORT_SYMBOL_GPL(saa7146_unregister_extension);