#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
* 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;
* 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)
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;
/********************************************************************************/
/* 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;
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;
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;
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;
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++;
}
}
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 */
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;
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;
}
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
/* 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);
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);
/* 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--;
{
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)
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);
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