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Diffstat (limited to 'drivers/media/common/saa7146/saa7146_core.c')
-rw-r--r--drivers/media/common/saa7146/saa7146_core.c99
1 files changed, 39 insertions, 60 deletions
diff --git a/drivers/media/common/saa7146/saa7146_core.c b/drivers/media/common/saa7146/saa7146_core.c
index 9f7c5b0a6b45..27c53eed8fe3 100644
--- a/drivers/media/common/saa7146/saa7146_core.c
+++ b/drivers/media/common/saa7146/saa7146_core.c
@@ -1,21 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
saa7146.o - driver for generic saa7146-based hardware
Copyright (C) 1998-2003 Michael Hunold <michael@mihu.de>
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
-
- 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
@@ -49,7 +37,8 @@ void saa7146_setgpio(struct saa7146_dev *dev, int port, u32 data)
{
u32 value = 0;
- BUG_ON(port > 3);
+ if (WARN_ON(port > 3))
+ return;
value = saa7146_read(dev, GPIO_CTRL);
value &= ~(0xff << (8*port));
@@ -144,15 +133,15 @@ int saa7146_wait_for_debi_done(struct saa7146_dev *dev, int nobusyloop)
****************************************************************************/
/* this is videobuf_vmalloc_to_sg() from videobuf-dma-sg.c
- make sure virt has been allocated with vmalloc_32(), otherwise the BUG()
- may be triggered on highmem machines */
+ make sure virt has been allocated with vmalloc_32(), otherwise return NULL
+ on highmem machines */
static struct scatterlist* vmalloc_to_sg(unsigned char *virt, int nr_pages)
{
struct scatterlist *sglist;
struct page *pg;
int i;
- sglist = kcalloc(nr_pages, sizeof(struct scatterlist), GFP_KERNEL);
+ sglist = kmalloc_array(nr_pages, sizeof(struct scatterlist), GFP_KERNEL);
if (NULL == sglist)
return NULL;
sg_init_table(sglist, nr_pages);
@@ -160,7 +149,8 @@ static struct scatterlist* vmalloc_to_sg(unsigned char *virt, int nr_pages)
pg = vmalloc_to_page(virt);
if (NULL == pg)
goto err;
- BUG_ON(PageHighMem(pg));
+ if (WARN_ON(PageHighMem(pg)))
+ goto err;
sg_set_page(&sglist[i], pg, PAGE_SIZE, 0);
}
return sglist;
@@ -189,7 +179,7 @@ void *saa7146_vmalloc_build_pgtable(struct pci_dev *pci, long length, struct saa
goto err_free_slist;
pt->nents = pages;
- slen = pci_map_sg(pci,pt->slist,pt->nents,PCI_DMA_FROMDEVICE);
+ slen = dma_map_sg(&pci->dev, pt->slist, pt->nents, DMA_FROM_DEVICE);
if (0 == slen)
goto err_free_pgtable;
@@ -199,7 +189,7 @@ void *saa7146_vmalloc_build_pgtable(struct pci_dev *pci, long length, struct saa
return mem;
err_unmap_sg:
- pci_unmap_sg(pci, pt->slist, pt->nents, PCI_DMA_FROMDEVICE);
+ dma_unmap_sg(&pci->dev, pt->slist, pt->nents, DMA_FROM_DEVICE);
err_free_pgtable:
saa7146_pgtable_free(pci, pt);
err_free_slist:
@@ -213,7 +203,7 @@ err_null:
void saa7146_vfree_destroy_pgtable(struct pci_dev *pci, void *mem, struct saa7146_pgtable *pt)
{
- pci_unmap_sg(pci, pt->slist, pt->nents, PCI_DMA_FROMDEVICE);
+ dma_unmap_sg(&pci->dev, pt->slist, pt->nents, DMA_FROM_DEVICE);
saa7146_pgtable_free(pci, pt);
kfree(pt->slist);
pt->slist = NULL;
@@ -224,7 +214,7 @@ void saa7146_pgtable_free(struct pci_dev *pci, struct saa7146_pgtable *pt)
{
if (NULL == pt->cpu)
return;
- pci_free_consistent(pci, pt->size, pt->cpu, pt->dma);
+ dma_free_coherent(&pci->dev, pt->size, pt->cpu, pt->dma);
pt->cpu = NULL;
}
@@ -233,7 +223,7 @@ int saa7146_pgtable_alloc(struct pci_dev *pci, struct saa7146_pgtable *pt)
__le32 *cpu;
dma_addr_t dma_addr = 0;
- cpu = pci_alloc_consistent(pci, PAGE_SIZE, &dma_addr);
+ cpu = dma_alloc_coherent(&pci->dev, PAGE_SIZE, &dma_addr, GFP_KERNEL);
if (NULL == cpu) {
return -ENOMEM;
}
@@ -245,46 +235,32 @@ 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 )
+ struct scatterlist *list, int sglen)
{
+ struct sg_dma_page_iter dma_iter;
__le32 *ptr, fill;
int nr_pages = 0;
- int i,p;
+ int i;
- BUG_ON(0 == sglen);
- BUG_ON(list->offset > PAGE_SIZE);
+ if (WARN_ON(!sglen) ||
+ WARN_ON(list->offset > PAGE_SIZE))
+ return -EIO;
/* if we have a user buffer, the first page may not be
aligned to a page boundary. */
pt->offset = list->offset;
ptr = pt->cpu;
- for (i = 0; i < sglen; i++, list++) {
-/*
- pr_debug("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 = cpu_to_le32(sg_dma_address(list) + p * 4096);
- nr_pages++;
- }
+ for_each_sg_dma_page(list, &dma_iter, sglen, 0) {
+ *ptr++ = cpu_to_le32(sg_page_iter_dma_address(&dma_iter));
+ nr_pages++;
}
/* safety; fill the page table up with the last valid page */
fill = *(ptr-1);
- for(i=nr_pages;i<1024;i++) {
+ for (i = nr_pages; i < 1024; i++)
*ptr++ = fill;
- }
-
-/*
- ptr = pt->cpu;
- pr_debug("offset: %d\n", pt->offset);
- for(i=0;i<5;i++) {
- pr_debug("ptr1 %d: 0x%08x\n", i, ptr[i]);
- }
-*/
return 0;
}
@@ -424,18 +400,20 @@ static int saa7146_init_one(struct pci_dev *pci, const struct pci_device_id *ent
err = -ENOMEM;
/* get memory for various stuff */
- dev->d_rps0.cpu_addr = pci_zalloc_consistent(pci, SAA7146_RPS_MEM,
- &dev->d_rps0.dma_handle);
+ dev->d_rps0.cpu_addr = dma_alloc_coherent(&pci->dev, SAA7146_RPS_MEM,
+ &dev->d_rps0.dma_handle,
+ GFP_KERNEL);
if (!dev->d_rps0.cpu_addr)
goto err_free_irq;
- dev->d_rps1.cpu_addr = pci_zalloc_consistent(pci, SAA7146_RPS_MEM,
- &dev->d_rps1.dma_handle);
+ dev->d_rps1.cpu_addr = dma_alloc_coherent(&pci->dev, SAA7146_RPS_MEM,
+ &dev->d_rps1.dma_handle,
+ GFP_KERNEL);
if (!dev->d_rps1.cpu_addr)
goto err_free_rps0;
- dev->d_i2c.cpu_addr = pci_zalloc_consistent(pci, SAA7146_RPS_MEM,
- &dev->d_i2c.dma_handle);
+ dev->d_i2c.cpu_addr = dma_alloc_coherent(&pci->dev, SAA7146_RPS_MEM,
+ &dev->d_i2c.dma_handle, GFP_KERNEL);
if (!dev->d_i2c.cpu_addr)
goto err_free_rps1;
@@ -483,14 +461,14 @@ out:
return err;
err_free_i2c:
- pci_free_consistent(pci, SAA7146_RPS_MEM, dev->d_i2c.cpu_addr,
- dev->d_i2c.dma_handle);
+ dma_free_coherent(&pci->dev, 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);
+ dma_free_coherent(&pci->dev, 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);
+ dma_free_coherent(&pci->dev, SAA7146_RPS_MEM, dev->d_rps0.cpu_addr,
+ dev->d_rps0.dma_handle);
err_free_irq:
free_irq(pci->irq, (void *)dev);
err_unmap:
@@ -531,7 +509,8 @@ static void saa7146_remove_one(struct pci_dev *pdev)
free_irq(pdev->irq, dev);
for (p = dev_map; p->addr; p++)
- pci_free_consistent(pdev, SAA7146_RPS_MEM, p->addr, p->dma);
+ dma_free_coherent(&pdev->dev, SAA7146_RPS_MEM, p->addr,
+ p->dma);
iounmap(dev->mem);
pci_release_region(pdev, 0);
generated by cgit (git 2.34.1) at 2025-12-25 22:11:34 +0000