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path: root/drivers/media/video/saa7164/saa7164-buffer.c
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Diffstat (limited to 'drivers/media/video/saa7164/saa7164-buffer.c')
-rw-r--r--drivers/media/video/saa7164/saa7164-buffer.c322
1 files changed, 0 insertions, 322 deletions
diff --git a/drivers/media/video/saa7164/saa7164-buffer.c b/drivers/media/video/saa7164/saa7164-buffer.c
deleted file mode 100644
index 66696fa8341d..000000000000
--- a/drivers/media/video/saa7164/saa7164-buffer.c
+++ /dev/null
@@ -1,322 +0,0 @@
-/*
- * Driver for the NXP SAA7164 PCIe bridge
- *
- * Copyright (c) 2010 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 <linux/slab.h>
-
-#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
- */
-
-void saa7164_buffer_display(struct saa7164_buffer *buf)
-{
- struct saa7164_dev *dev = buf->port->dev;
- int i;
-
- dprintk(DBGLVL_BUF, "%s() buffer @ 0x%p nr=%d\n",
- __func__, buf, buf->idx);
- dprintk(DBGLVL_BUF, " pci_cpu @ 0x%p dma @ 0x%08llx len = 0x%x\n",
- buf->cpu, (long long)buf->dma, buf->pci_size);
- dprintk(DBGLVL_BUF, " pt_cpu @ 0x%p pt_dma @ 0x%08llx len = 0x%x\n",
- buf->pt_cpu, (long 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++) {
-
- dprintk(DBGLVL_BUF, " pt[%02d] = 0x%p -> 0x%llx\n",
- i, buf->pt_cpu, (u64)*(buf->pt_cpu));
-
- }
-}
-/* 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_port *port,
- u32 len)
-{
- struct tmHWStreamParameters *params = &port->hw_streamingparams;
- struct saa7164_buffer *buf = NULL;
- 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) {
- log_warn("%s() SAA_ERR_NO_RESOURCES\n", __func__);
- goto ret;
- }
-
- buf->idx = -1;
- buf->port = port;
- buf->flags = SAA7164_BUFFER_FREE;
- buf->pos = 0;
- buf->actual_size = params->pitch * params->numberoflines;
- buf->crc = 0;
- /* 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_io(buf->cpu, 0xff, buf->pci_size);
- buf->crc = crc32(0, buf->cpu, buf->actual_size);
- memset_io(buf->pt_cpu, 0xff, buf->pt_size);
-
- dprintk(DBGLVL_BUF, "%s() allocated buffer @ 0x%p (%d pageptrs)\n",
- __func__, buf, params->numpagetables);
- 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 < params->numpagetables; i++) {
-
- *(buf->pt_cpu + i) = buf->dma + (i * 0x1000); /* TODO */
- dprintk(DBGLVL_BUF, " pt[%02d] = 0x%p -> 0x%llx\n",
- i, buf->pt_cpu, (u64)*(buf->pt_cpu));
-
- }
-
- goto ret;
-
-fail2:
- pci_free_consistent(port->dev->pci, buf->pci_size, buf->cpu, buf->dma);
-fail1:
- kfree(buf);
-
- buf = NULL;
-ret:
- return buf;
-}
-
-int saa7164_buffer_dealloc(struct saa7164_buffer *buf)
-{
- struct saa7164_dev *dev;
-
- if (!buf || !buf->port)
- return SAA_ERR_BAD_PARAMETER;
- dev = buf->port->dev;
-
- 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(dev->pci, buf->pci_size, buf->cpu, buf->dma);
- pci_free_consistent(dev->pci, buf->pt_size, buf->pt_cpu, buf->pt_dma);
-
- kfree(buf);
-
- return SAA_OK;
-}
-
-int saa7164_buffer_zero_offsets(struct saa7164_port *port, int i)
-{
- struct saa7164_dev *dev = port->dev;
-
- if ((i < 0) || (i >= port->hwcfg.buffercount))
- return -EINVAL;
-
- dprintk(DBGLVL_BUF, "%s(idx = %d)\n", __func__, i);
-
- saa7164_writel(port->bufoffset + (sizeof(u32) * i), 0);
-
- return 0;
-}
-
-/* Write a buffer into the hardware */
-int saa7164_buffer_activate(struct saa7164_buffer *buf, int i)
-{
- struct saa7164_port *port = buf->port;
- struct saa7164_dev *dev = port->dev;
-
- if ((i < 0) || (i >= port->hwcfg.buffercount))
- return -EINVAL;
-
- dprintk(DBGLVL_BUF, "%s(idx = %d)\n", __func__, i);
-
- buf->idx = i; /* Note of which buffer list index position we occupy */
- buf->flags = SAA7164_BUFFER_BUSY;
- buf->pos = 0;
-
- /* TODO: Review this in light of 32v64 assignments */
- saa7164_writel(port->bufoffset + (sizeof(u32) * i), 0);
- saa7164_writel(port->bufptr32h + ((sizeof(u32) * 2) * i), buf->pt_dma);
- saa7164_writel(port->bufptr32l + ((sizeof(u32) * 2) * i), 0);
-
- dprintk(DBGLVL_BUF, " buf[%d] offset 0x%llx (0x%x) "
- "buf 0x%llx/%llx (0x%x/%x) nr=%d\n",
- buf->idx,
- (u64)port->bufoffset + (i * sizeof(u32)),
- saa7164_readl(port->bufoffset + (sizeof(u32) * i)),
- (u64)port->bufptr32h + ((sizeof(u32) * 2) * i),
- (u64)port->bufptr32l + ((sizeof(u32) * 2) * i),
- saa7164_readl(port->bufptr32h + ((sizeof(u32) * i) * 2)),
- saa7164_readl(port->bufptr32l + ((sizeof(u32) * i) * 2)),
- buf->idx);
-
- return 0;
-}
-
-int saa7164_buffer_cfg_port(struct saa7164_port *port)
-{
- struct tmHWStreamParameters *params = &port->hw_streamingparams;
- struct saa7164_dev *dev = port->dev;
- struct saa7164_buffer *buf;
- struct list_head *c, *n;
- int i = 0;
-
- dprintk(DBGLVL_BUF, "%s(port=%d)\n", __func__, port->nr);
-
- saa7164_writel(port->bufcounter, 0);
- saa7164_writel(port->pitch, params->pitch);
- saa7164_writel(port->bufsize, params->pitch * params->numberoflines);
-
- dprintk(DBGLVL_BUF, " configured:\n");
- dprintk(DBGLVL_BUF, " lmmio 0x%p\n", dev->lmmio);
- dprintk(DBGLVL_BUF, " bufcounter 0x%x = 0x%x\n", port->bufcounter,
- saa7164_readl(port->bufcounter));
-
- dprintk(DBGLVL_BUF, " pitch 0x%x = %d\n", port->pitch,
- saa7164_readl(port->pitch));
-
- dprintk(DBGLVL_BUF, " bufsize 0x%x = %d\n", port->bufsize,
- saa7164_readl(port->bufsize));
-
- dprintk(DBGLVL_BUF, " buffercount = %d\n", port->hwcfg.buffercount);
- dprintk(DBGLVL_BUF, " bufoffset = 0x%x\n", port->bufoffset);
- dprintk(DBGLVL_BUF, " bufptr32h = 0x%x\n", port->bufptr32h);
- dprintk(DBGLVL_BUF, " bufptr32l = 0x%x\n", port->bufptr32l);
-
- /* Poke the buffers and offsets into PCI space */
- mutex_lock(&port->dmaqueue_lock);
- list_for_each_safe(c, n, &port->dmaqueue.list) {
- buf = list_entry(c, struct saa7164_buffer, list);
-
- if (buf->flags != SAA7164_BUFFER_FREE)
- BUG();
-
- /* Place the buffer in the h/w queue */
- saa7164_buffer_activate(buf, i);
-
- /* Don't exceed the device maximum # bufs */
- if (i++ > port->hwcfg.buffercount)
- BUG();
-
- }
- mutex_unlock(&port->dmaqueue_lock);
-
- return 0;
-}
-
-struct saa7164_user_buffer *saa7164_buffer_alloc_user(struct saa7164_dev *dev,
- u32 len)
-{
- struct saa7164_user_buffer *buf;
-
- buf = kzalloc(sizeof(struct saa7164_user_buffer), GFP_KERNEL);
- if (!buf)
- return NULL;
-
- buf->data = kzalloc(len, GFP_KERNEL);
-
- if (!buf->data) {
- kfree(buf);
- return NULL;
- }
-
- buf->actual_size = len;
- buf->pos = 0;
- buf->crc = 0;
-
- dprintk(DBGLVL_BUF, "%s() allocated user buffer @ 0x%p\n",
- __func__, buf);
-
- return buf;
-}
-
-void saa7164_buffer_dealloc_user(struct saa7164_user_buffer *buf)
-{
- if (!buf)
- return;
-
- kfree(buf->data);
- buf->data = NULL;
-
- kfree(buf);
-}
-
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-31 18:39:18 +0000