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path: root/drivers/media/dvb/mantis/mantis_dma.c
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Diffstat (limited to 'drivers/media/dvb/mantis/mantis_dma.c')
-rw-r--r--drivers/media/dvb/mantis/mantis_dma.c256
1 files changed, 0 insertions, 256 deletions
diff --git a/drivers/media/dvb/mantis/mantis_dma.c b/drivers/media/dvb/mantis/mantis_dma.c
deleted file mode 100644
index 46202a4012a..00000000000
--- a/drivers/media/dvb/mantis/mantis_dma.c
+++ /dev/null
@@ -1,256 +0,0 @@
-/*
- Mantis PCI bridge driver
-
- Copyright (C) Manu Abraham (abraham.manu@gmail.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/kernel.h>
-#include <asm/page.h>
-#include <linux/vmalloc.h>
-#include <linux/pci.h>
-
-#include <asm/irq.h>
-#include <linux/signal.h>
-#include <linux/sched.h>
-#include <linux/interrupt.h>
-
-#include "dmxdev.h"
-#include "dvbdev.h"
-#include "dvb_demux.h"
-#include "dvb_frontend.h"
-#include "dvb_net.h"
-
-#include "mantis_common.h"
-#include "mantis_reg.h"
-#include "mantis_dma.h"
-
-#define RISC_WRITE (0x01 << 28)
-#define RISC_JUMP (0x07 << 28)
-#define RISC_IRQ (0x01 << 24)
-
-#define RISC_STATUS(status) ((((~status) & 0x0f) << 20) | ((status & 0x0f) << 16))
-#define RISC_FLUSH() (mantis->risc_pos = 0)
-#define RISC_INSTR(opcode) (mantis->risc_cpu[mantis->risc_pos++] = cpu_to_le32(opcode))
-
-#define MANTIS_BUF_SIZE (64 * 1024)
-#define MANTIS_BLOCK_BYTES (MANTIS_BUF_SIZE >> 4)
-#define MANTIS_BLOCK_COUNT (1 << 4)
-#define MANTIS_RISC_SIZE PAGE_SIZE
-
-int mantis_dma_exit(struct mantis_pci *mantis)
-{
- if (mantis->buf_cpu) {
- dprintk(MANTIS_ERROR, 1,
- "DMA=0x%lx cpu=0x%p size=%d",
- (unsigned long) mantis->buf_dma,
- mantis->buf_cpu,
- MANTIS_BUF_SIZE);
-
- pci_free_consistent(mantis->pdev, MANTIS_BUF_SIZE,
- mantis->buf_cpu, mantis->buf_dma);
-
- mantis->buf_cpu = NULL;
- }
- if (mantis->risc_cpu) {
- dprintk(MANTIS_ERROR, 1,
- "RISC=0x%lx cpu=0x%p size=%lx",
- (unsigned long) mantis->risc_dma,
- mantis->risc_cpu,
- MANTIS_RISC_SIZE);
-
- pci_free_consistent(mantis->pdev, MANTIS_RISC_SIZE,
- mantis->risc_cpu, mantis->risc_dma);
-
- mantis->risc_cpu = NULL;
- }
-
- return 0;
-}
-EXPORT_SYMBOL_GPL(mantis_dma_exit);
-
-static inline int mantis_alloc_buffers(struct mantis_pci *mantis)
-{
- if (!mantis->buf_cpu) {
- mantis->buf_cpu = pci_alloc_consistent(mantis->pdev,
- MANTIS_BUF_SIZE,
- &mantis->buf_dma);
- if (!mantis->buf_cpu) {
- dprintk(MANTIS_ERROR, 1,
- "DMA buffer allocation failed");
-
- goto err;
- }
- dprintk(MANTIS_ERROR, 1,
- "DMA=0x%lx cpu=0x%p size=%d",
- (unsigned long) mantis->buf_dma,
- mantis->buf_cpu, MANTIS_BUF_SIZE);
- }
- if (!mantis->risc_cpu) {
- mantis->risc_cpu = pci_alloc_consistent(mantis->pdev,
- MANTIS_RISC_SIZE,
- &mantis->risc_dma);
-
- if (!mantis->risc_cpu) {
- dprintk(MANTIS_ERROR, 1,
- "RISC program allocation failed");
-
- mantis_dma_exit(mantis);
-
- goto err;
- }
- dprintk(MANTIS_ERROR, 1,
- "RISC=0x%lx cpu=0x%p size=%lx",
- (unsigned long) mantis->risc_dma,
- mantis->risc_cpu, MANTIS_RISC_SIZE);
- }
-
- return 0;
-err:
- dprintk(MANTIS_ERROR, 1, "Out of memory (?) .....");
- return -ENOMEM;
-}
-
-static inline int mantis_calc_lines(struct mantis_pci *mantis)
-{
- mantis->line_bytes = MANTIS_BLOCK_BYTES;
- mantis->line_count = MANTIS_BLOCK_COUNT;
-
- while (mantis->line_bytes > 4095) {
- mantis->line_bytes >>= 1;
- mantis->line_count <<= 1;
- }
-
- dprintk(MANTIS_DEBUG, 1, "Mantis RISC block bytes=[%d], line bytes=[%d], line count=[%d]",
- MANTIS_BLOCK_BYTES, mantis->line_bytes, mantis->line_count);
-
- if (mantis->line_count > 255) {
- dprintk(MANTIS_ERROR, 1, "Buffer size error");
- return -EINVAL;
- }
-
- return 0;
-}
-
-int mantis_dma_init(struct mantis_pci *mantis)
-{
- int err = 0;
-
- dprintk(MANTIS_DEBUG, 1, "Mantis DMA init");
- if (mantis_alloc_buffers(mantis) < 0) {
- dprintk(MANTIS_ERROR, 1, "Error allocating DMA buffer");
-
- /* Stop RISC Engine */
- mmwrite(0, MANTIS_DMA_CTL);
-
- goto err;
- }
- err = mantis_calc_lines(mantis);
- if (err < 0) {
- dprintk(MANTIS_ERROR, 1, "Mantis calc lines failed");
-
- goto err;
- }
-
- return 0;
-err:
- return err;
-}
-EXPORT_SYMBOL_GPL(mantis_dma_init);
-
-static inline void mantis_risc_program(struct mantis_pci *mantis)
-{
- u32 buf_pos = 0;
- u32 line;
-
- dprintk(MANTIS_DEBUG, 1, "Mantis create RISC program");
- RISC_FLUSH();
-
- dprintk(MANTIS_DEBUG, 1, "risc len lines %u, bytes per line %u",
- mantis->line_count, mantis->line_bytes);
-
- for (line = 0; line < mantis->line_count; line++) {
- dprintk(MANTIS_DEBUG, 1, "RISC PROG line=[%d]", line);
- if (!(buf_pos % MANTIS_BLOCK_BYTES)) {
- RISC_INSTR(RISC_WRITE |
- RISC_IRQ |
- RISC_STATUS(((buf_pos / MANTIS_BLOCK_BYTES) +
- (MANTIS_BLOCK_COUNT - 1)) %
- MANTIS_BLOCK_COUNT) |
- mantis->line_bytes);
- } else {
- RISC_INSTR(RISC_WRITE | mantis->line_bytes);
- }
- RISC_INSTR(mantis->buf_dma + buf_pos);
- buf_pos += mantis->line_bytes;
- }
- RISC_INSTR(RISC_JUMP);
- RISC_INSTR(mantis->risc_dma);
-}
-
-void mantis_dma_start(struct mantis_pci *mantis)
-{
- dprintk(MANTIS_DEBUG, 1, "Mantis Start DMA engine");
-
- mantis_risc_program(mantis);
- mmwrite(mantis->risc_dma, MANTIS_RISC_START);
- mmwrite(mmread(MANTIS_GPIF_ADDR) | MANTIS_GPIF_HIFRDWRN, MANTIS_GPIF_ADDR);
-
- mmwrite(0, MANTIS_DMA_CTL);
- mantis->last_block = mantis->finished_block = 0;
-
- mmwrite(mmread(MANTIS_INT_MASK) | MANTIS_INT_RISCI, MANTIS_INT_MASK);
-
- mmwrite(MANTIS_FIFO_EN | MANTIS_DCAP_EN
- | MANTIS_RISC_EN, MANTIS_DMA_CTL);
-
-}
-
-void mantis_dma_stop(struct mantis_pci *mantis)
-{
- u32 stat = 0, mask = 0;
-
- stat = mmread(MANTIS_INT_STAT);
- mask = mmread(MANTIS_INT_MASK);
- dprintk(MANTIS_DEBUG, 1, "Mantis Stop DMA engine");
-
- mmwrite((mmread(MANTIS_GPIF_ADDR) & (~(MANTIS_GPIF_HIFRDWRN))), MANTIS_GPIF_ADDR);
-
- mmwrite((mmread(MANTIS_DMA_CTL) & ~(MANTIS_FIFO_EN |
- MANTIS_DCAP_EN |
- MANTIS_RISC_EN)), MANTIS_DMA_CTL);
-
- mmwrite(mmread(MANTIS_INT_STAT), MANTIS_INT_STAT);
-
- mmwrite(mmread(MANTIS_INT_MASK) & ~(MANTIS_INT_RISCI |
- MANTIS_INT_RISCEN), MANTIS_INT_MASK);
-}
-
-
-void mantis_dma_xfer(unsigned long data)
-{
- struct mantis_pci *mantis = (struct mantis_pci *) data;
- struct mantis_hwconfig *config = mantis->hwconfig;
-
- while (mantis->last_block != mantis->finished_block) {
- dprintk(MANTIS_DEBUG, 1, "last block=[%d] finished block=[%d]",
- mantis->last_block, mantis->finished_block);
-
- (config->ts_size ? dvb_dmx_swfilter_204 : dvb_dmx_swfilter)
- (&mantis->demux, &mantis->buf_cpu[mantis->last_block * MANTIS_BLOCK_BYTES], MANTIS_BLOCK_BYTES);
- mantis->last_block = (mantis->last_block + 1) % MANTIS_BLOCK_COUNT;
- }
-}
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