diff options
Diffstat (limited to 'drivers/media/video/saa7164/saa7164-buffer.c')
| -rw-r--r-- | drivers/media/video/saa7164/saa7164-buffer.c | 155 |
1 files changed, 0 insertions, 155 deletions
diff --git a/drivers/media/video/saa7164/saa7164-buffer.c b/drivers/media/video/saa7164/saa7164-buffer.c deleted file mode 100644 index 9ca5c83d165..00000000000 --- a/drivers/media/video/saa7164/saa7164-buffer.c +++ /dev/null @@ -1,155 +0,0 @@ -/* - * Driver for the NXP SAA7164 PCIe bridge - * - * Copyright (c) 2009 Steven Toth <stoth@kernellabs.com> - * - * 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. - */ - -#include "saa7164.h" - -/* The PCI address space for buffer handling looks like this: - - +-u32 wide-------------+ - | + - +-u64 wide------------------------------------+ - + + - +----------------------+ - | CurrentBufferPtr + Pointer to current PCI buffer >-+ - +----------------------+ | - | Unused + | - +----------------------+ | - | Pitch + = 188 (bytes) | - +----------------------+ | - | PCI buffer size + = pitch * number of lines (312) | - +----------------------+ | - |0| Buf0 Write Offset + | - +----------------------+ v - |1| Buf1 Write Offset + | - +----------------------+ | - |2| Buf2 Write Offset + | - +----------------------+ | - |3| Buf3 Write Offset + | - +----------------------+ | - ... More write offsets | - +---------------------------------------------+ | - +0| set of ptrs to PCI pagetables + | - +---------------------------------------------+ | - +1| set of ptrs to PCI pagetables + <--------+ - +---------------------------------------------+ - +2| set of ptrs to PCI pagetables + - +---------------------------------------------+ - +3| set of ptrs to PCI pagetables + >--+ - +---------------------------------------------+ | - ... More buffer pointers | +----------------+ - +->| pt[0] TS data | - | +----------------+ - | - | +----------------+ - +->| pt[1] TS data | - | +----------------+ - | etc - */ - -/* Allocate a new buffer structure and associated PCI space in bytes. - * len must be a multiple of sizeof(u64) - */ -struct saa7164_buffer *saa7164_buffer_alloc(struct saa7164_tsport *port, - u32 len) -{ - struct saa7164_buffer *buf = 0; - struct saa7164_dev *dev = port->dev; - int i; - - if ((len == 0) || (len >= 65536) || (len % sizeof(u64))) { - log_warn("%s() SAA_ERR_BAD_PARAMETER\n", __func__); - goto ret; - } - - buf = kzalloc(sizeof(struct saa7164_buffer), GFP_KERNEL); - if (buf == NULL) { - log_warn("%s() SAA_ERR_NO_RESOURCES\n", __func__); - goto ret; - } - - buf->port = port; - buf->flags = SAA7164_BUFFER_FREE; - /* TODO: arg len is being ignored */ - buf->pci_size = SAA7164_PT_ENTRIES * 0x1000; - buf->pt_size = (SAA7164_PT_ENTRIES * sizeof(u64)) + 0x1000; - - /* Allocate contiguous memory */ - buf->cpu = pci_alloc_consistent(port->dev->pci, buf->pci_size, - &buf->dma); - if (!buf->cpu) - goto fail1; - - buf->pt_cpu = pci_alloc_consistent(port->dev->pci, buf->pt_size, - &buf->pt_dma); - if (!buf->pt_cpu) - goto fail2; - - /* init the buffers to a known pattern, easier during debugging */ - memset(buf->cpu, 0xff, buf->pci_size); - memset(buf->pt_cpu, 0xff, buf->pt_size); - - dprintk(DBGLVL_BUF, "%s() allocated buffer @ 0x%p\n", __func__, buf); - dprintk(DBGLVL_BUF, " pci_cpu @ 0x%p dma @ 0x%08lx len = 0x%x\n", - buf->cpu, (long)buf->dma, buf->pci_size); - dprintk(DBGLVL_BUF, " pt_cpu @ 0x%p pt_dma @ 0x%08lx len = 0x%x\n", - buf->pt_cpu, (long)buf->pt_dma, buf->pt_size); - - /* Format the Page Table Entries to point into the data buffer */ - for (i = 0 ; i < SAA7164_PT_ENTRIES; i++) { - - *(buf->pt_cpu + i) = buf->dma + (i * 0x1000); /* TODO */ - - } - - goto ret; - -fail2: - pci_free_consistent(port->dev->pci, buf->pci_size, buf->cpu, buf->dma); -fail1: - kfree(buf); - - buf = 0; -ret: - return buf; -} - -int saa7164_buffer_dealloc(struct saa7164_tsport *port, - struct saa7164_buffer *buf) -{ - struct saa7164_dev *dev = port->dev; - - if ((buf == 0) || (port == 0)) - return SAA_ERR_BAD_PARAMETER; - - dprintk(DBGLVL_BUF, "%s() deallocating buffer @ 0x%p\n", __func__, buf); - - if (buf->flags != SAA7164_BUFFER_FREE) - log_warn(" freeing a non-free buffer\n"); - - pci_free_consistent(port->dev->pci, buf->pci_size, buf->cpu, buf->dma); - pci_free_consistent(port->dev->pci, buf->pt_size, buf->pt_cpu, - buf->pt_dma); - - kfree(buf); - - return SAA_OK; -} - |