806 lines
20 KiB
C
806 lines
20 KiB
C
/*
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* Driver for the Conexant CX25821 PCIe bridge
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*
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* Copyright (C) 2009 Conexant Systems Inc.
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* Authors <hiep.huynh@conexant.com>, <shu.lin@conexant.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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*
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include "cx25821-video.h"
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#include "cx25821-audio-upstream.h"
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#include <linux/fs.h>
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#include <linux/errno.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/syscalls.h>
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#include <linux/file.h>
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#include <linux/fcntl.h>
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#include <linux/delay.h>
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#include <linux/slab.h>
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#include <linux/uaccess.h>
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MODULE_DESCRIPTION("v4l2 driver module for cx25821 based TV cards");
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MODULE_AUTHOR("Hiep Huynh <hiep.huynh@conexant.com>");
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MODULE_LICENSE("GPL");
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static int _intr_msk =
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FLD_AUD_SRC_RISCI1 | FLD_AUD_SRC_OF | FLD_AUD_SRC_SYNC |
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FLD_AUD_SRC_OPC_ERR;
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int cx25821_sram_channel_setup_upstream_audio(struct cx25821_dev *dev,
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struct sram_channel *ch,
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unsigned int bpl, u32 risc)
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{
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unsigned int i, lines;
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u32 cdt;
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if (ch->cmds_start == 0) {
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cx_write(ch->ptr1_reg, 0);
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cx_write(ch->ptr2_reg, 0);
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cx_write(ch->cnt2_reg, 0);
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cx_write(ch->cnt1_reg, 0);
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return 0;
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}
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bpl = (bpl + 7) & ~7; /* alignment */
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cdt = ch->cdt;
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lines = ch->fifo_size / bpl;
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if (lines > 3)
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lines = 3;
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BUG_ON(lines < 2);
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/* write CDT */
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for (i = 0; i < lines; i++) {
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cx_write(cdt + 16 * i, ch->fifo_start + bpl * i);
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cx_write(cdt + 16 * i + 4, 0);
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cx_write(cdt + 16 * i + 8, 0);
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cx_write(cdt + 16 * i + 12, 0);
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}
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/* write CMDS */
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cx_write(ch->cmds_start + 0, risc);
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cx_write(ch->cmds_start + 4, 0);
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cx_write(ch->cmds_start + 8, cdt);
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cx_write(ch->cmds_start + 12, AUDIO_CDT_SIZE_QW);
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cx_write(ch->cmds_start + 16, ch->ctrl_start);
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/* IQ size */
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cx_write(ch->cmds_start + 20, AUDIO_IQ_SIZE_DW);
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for (i = 24; i < 80; i += 4)
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cx_write(ch->cmds_start + i, 0);
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/* fill registers */
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cx_write(ch->ptr1_reg, ch->fifo_start);
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cx_write(ch->ptr2_reg, cdt);
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cx_write(ch->cnt2_reg, AUDIO_CDT_SIZE_QW);
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cx_write(ch->cnt1_reg, AUDIO_CLUSTER_SIZE_QW - 1);
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return 0;
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}
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static __le32 *cx25821_risc_field_upstream_audio(struct cx25821_dev *dev,
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__le32 *rp,
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dma_addr_t databuf_phys_addr,
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unsigned int bpl,
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int fifo_enable)
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{
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unsigned int line;
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struct sram_channel *sram_ch =
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&dev->sram_channels[dev->_audio_upstream_channel_select];
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int offset = 0;
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/* scan lines */
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for (line = 0; line < LINES_PER_AUDIO_BUFFER; line++) {
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*(rp++) = cpu_to_le32(RISC_READ | RISC_SOL | RISC_EOL | bpl);
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*(rp++) = cpu_to_le32(databuf_phys_addr + offset);
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*(rp++) = cpu_to_le32(0); /* bits 63-32 */
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/* Check if we need to enable the FIFO
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* after the first 3 lines.
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* For the upstream audio channel,
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* the risc engine will enable the FIFO */
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if (fifo_enable && line == 2) {
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*(rp++) = RISC_WRITECR;
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*(rp++) = sram_ch->dma_ctl;
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*(rp++) = sram_ch->fld_aud_fifo_en;
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*(rp++) = 0x00000020;
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}
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offset += AUDIO_LINE_SIZE;
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}
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return rp;
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}
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int cx25821_risc_buffer_upstream_audio(struct cx25821_dev *dev,
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struct pci_dev *pci,
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unsigned int bpl, unsigned int lines)
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{
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__le32 *rp;
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int fifo_enable = 0;
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int frame = 0, i = 0;
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int frame_size = AUDIO_DATA_BUF_SZ;
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int databuf_offset = 0;
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int risc_flag = RISC_CNT_INC;
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dma_addr_t risc_phys_jump_addr;
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/* Virtual address of Risc buffer program */
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rp = dev->_risc_virt_addr;
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/* sync instruction */
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*(rp++) = cpu_to_le32(RISC_RESYNC | AUDIO_SYNC_LINE);
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for (frame = 0; frame < NUM_AUDIO_FRAMES; frame++) {
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databuf_offset = frame_size * frame;
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if (frame == 0) {
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fifo_enable = 1;
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risc_flag = RISC_CNT_RESET;
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} else {
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fifo_enable = 0;
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risc_flag = RISC_CNT_INC;
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}
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/* Calculate physical jump address */
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if ((frame + 1) == NUM_AUDIO_FRAMES) {
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risc_phys_jump_addr =
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dev->_risc_phys_start_addr +
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RISC_SYNC_INSTRUCTION_SIZE;
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} else {
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risc_phys_jump_addr =
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dev->_risc_phys_start_addr +
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RISC_SYNC_INSTRUCTION_SIZE +
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AUDIO_RISC_DMA_BUF_SIZE * (frame + 1);
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}
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rp = cx25821_risc_field_upstream_audio(dev, rp,
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dev->
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_audiodata_buf_phys_addr
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+ databuf_offset, bpl,
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fifo_enable);
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if (USE_RISC_NOOP_AUDIO) {
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for (i = 0; i < NUM_NO_OPS; i++)
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*(rp++) = cpu_to_le32(RISC_NOOP);
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}
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/* Loop to (Nth)FrameRISC or to Start of Risc program &
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* generate IRQ */
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*(rp++) = cpu_to_le32(RISC_JUMP | RISC_IRQ1 | risc_flag);
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*(rp++) = cpu_to_le32(risc_phys_jump_addr);
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*(rp++) = cpu_to_le32(0);
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/* Recalculate virtual address based on frame index */
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rp = dev->_risc_virt_addr + RISC_SYNC_INSTRUCTION_SIZE / 4 +
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(AUDIO_RISC_DMA_BUF_SIZE * (frame + 1) / 4);
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}
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return 0;
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}
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void cx25821_free_memory_audio(struct cx25821_dev *dev)
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{
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if (dev->_risc_virt_addr) {
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pci_free_consistent(dev->pci, dev->_audiorisc_size,
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dev->_risc_virt_addr, dev->_risc_phys_addr);
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dev->_risc_virt_addr = NULL;
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}
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if (dev->_audiodata_buf_virt_addr) {
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pci_free_consistent(dev->pci, dev->_audiodata_buf_size,
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dev->_audiodata_buf_virt_addr,
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dev->_audiodata_buf_phys_addr);
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dev->_audiodata_buf_virt_addr = NULL;
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}
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}
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void cx25821_stop_upstream_audio(struct cx25821_dev *dev)
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{
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struct sram_channel *sram_ch =
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&dev->sram_channels[AUDIO_UPSTREAM_SRAM_CHANNEL_B];
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u32 tmp = 0;
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if (!dev->_audio_is_running) {
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printk(KERN_DEBUG
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"cx25821: No audio file is currently running so return!\n");
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return;
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}
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/* Disable RISC interrupts */
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cx_write(sram_ch->int_msk, 0);
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/* Turn OFF risc and fifo enable in AUD_DMA_CNTRL */
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tmp = cx_read(sram_ch->dma_ctl);
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cx_write(sram_ch->dma_ctl,
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tmp & ~(sram_ch->fld_aud_fifo_en | sram_ch->fld_aud_risc_en));
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/* Clear data buffer memory */
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if (dev->_audiodata_buf_virt_addr)
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memset(dev->_audiodata_buf_virt_addr, 0,
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dev->_audiodata_buf_size);
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dev->_audio_is_running = 0;
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dev->_is_first_audio_frame = 0;
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dev->_audioframe_count = 0;
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dev->_audiofile_status = END_OF_FILE;
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if (dev->_irq_audio_queues) {
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kfree(dev->_irq_audio_queues);
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dev->_irq_audio_queues = NULL;
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}
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if (dev->_audiofilename != NULL)
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kfree(dev->_audiofilename);
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}
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void cx25821_free_mem_upstream_audio(struct cx25821_dev *dev)
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{
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if (dev->_audio_is_running)
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cx25821_stop_upstream_audio(dev);
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cx25821_free_memory_audio(dev);
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}
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int cx25821_get_audio_data(struct cx25821_dev *dev,
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struct sram_channel *sram_ch)
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{
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struct file *myfile;
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int frame_index_temp = dev->_audioframe_index;
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int i = 0;
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int line_size = AUDIO_LINE_SIZE;
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int frame_size = AUDIO_DATA_BUF_SZ;
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int frame_offset = frame_size * frame_index_temp;
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ssize_t vfs_read_retval = 0;
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char mybuf[line_size];
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loff_t file_offset = dev->_audioframe_count * frame_size;
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loff_t pos;
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mm_segment_t old_fs;
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if (dev->_audiofile_status == END_OF_FILE)
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return 0;
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myfile = filp_open(dev->_audiofilename, O_RDONLY | O_LARGEFILE, 0);
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if (IS_ERR(myfile)) {
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const int open_errno = -PTR_ERR(myfile);
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printk(KERN_ERR "%s(): ERROR opening file(%s) with errno = %d!\n",
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__func__, dev->_audiofilename, open_errno);
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return PTR_ERR(myfile);
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} else {
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if (!(myfile->f_op)) {
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printk("%s: File has no file operations registered!\n",
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__func__);
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filp_close(myfile, NULL);
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return -EIO;
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}
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if (!myfile->f_op->read) {
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printk("%s: File has no READ operations registered!\n",
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__func__);
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filp_close(myfile, NULL);
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return -EIO;
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}
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pos = myfile->f_pos;
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old_fs = get_fs();
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set_fs(KERNEL_DS);
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for (i = 0; i < dev->_audio_lines_count; i++) {
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pos = file_offset;
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vfs_read_retval =
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vfs_read(myfile, mybuf, line_size, &pos);
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if (vfs_read_retval > 0 && vfs_read_retval == line_size
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&& dev->_audiodata_buf_virt_addr != NULL) {
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memcpy((void *)(dev->_audiodata_buf_virt_addr +
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frame_offset / 4), mybuf,
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vfs_read_retval);
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}
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file_offset += vfs_read_retval;
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frame_offset += vfs_read_retval;
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if (vfs_read_retval < line_size) {
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printk(KERN_INFO
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"Done: exit %s() since no more bytes to read from Audio file.\n",
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__func__);
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break;
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}
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}
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if (i > 0)
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dev->_audioframe_count++;
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dev->_audiofile_status =
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(vfs_read_retval == line_size) ? IN_PROGRESS : END_OF_FILE;
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set_fs(old_fs);
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filp_close(myfile, NULL);
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}
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return 0;
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}
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static void cx25821_audioups_handler(struct work_struct *work)
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{
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struct cx25821_dev *dev =
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container_of(work, struct cx25821_dev, _audio_work_entry);
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if (!dev) {
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printk(KERN_ERR "ERROR %s(): since container_of(work_struct) FAILED!\n",
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__func__);
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return;
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}
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cx25821_get_audio_data(dev,
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&dev->sram_channels[dev->
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_audio_upstream_channel_select]);
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}
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int cx25821_openfile_audio(struct cx25821_dev *dev,
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struct sram_channel *sram_ch)
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{
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struct file *myfile;
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int i = 0, j = 0;
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int line_size = AUDIO_LINE_SIZE;
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ssize_t vfs_read_retval = 0;
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char mybuf[line_size];
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loff_t pos;
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loff_t offset = (unsigned long)0;
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mm_segment_t old_fs;
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myfile = filp_open(dev->_audiofilename, O_RDONLY | O_LARGEFILE, 0);
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if (IS_ERR(myfile)) {
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const int open_errno = -PTR_ERR(myfile);
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printk(KERN_ERR "%s(): ERROR opening file(%s) with errno = %d!\n",
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__func__, dev->_audiofilename, open_errno);
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return PTR_ERR(myfile);
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} else {
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if (!(myfile->f_op)) {
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printk("%s: File has no file operations registered!\n",
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__func__);
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filp_close(myfile, NULL);
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return -EIO;
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}
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if (!myfile->f_op->read) {
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printk("%s: File has no READ operations registered!\n",
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__func__);
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filp_close(myfile, NULL);
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return -EIO;
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}
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pos = myfile->f_pos;
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old_fs = get_fs();
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set_fs(KERNEL_DS);
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for (j = 0; j < NUM_AUDIO_FRAMES; j++) {
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for (i = 0; i < dev->_audio_lines_count; i++) {
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pos = offset;
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vfs_read_retval =
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vfs_read(myfile, mybuf, line_size, &pos);
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if (vfs_read_retval > 0
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&& vfs_read_retval == line_size
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&& dev->_audiodata_buf_virt_addr != NULL) {
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memcpy((void *)(dev->
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_audiodata_buf_virt_addr
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+ offset / 4), mybuf,
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vfs_read_retval);
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}
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offset += vfs_read_retval;
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if (vfs_read_retval < line_size) {
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printk(KERN_INFO
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"Done: exit %s() since no more bytes to read from Audio file.\n",
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__func__);
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break;
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}
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}
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if (i > 0)
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dev->_audioframe_count++;
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if (vfs_read_retval < line_size)
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break;
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}
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dev->_audiofile_status =
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(vfs_read_retval == line_size) ? IN_PROGRESS : END_OF_FILE;
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set_fs(old_fs);
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myfile->f_pos = 0;
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filp_close(myfile, NULL);
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}
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return 0;
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}
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static int cx25821_audio_upstream_buffer_prepare(struct cx25821_dev *dev,
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struct sram_channel *sram_ch,
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int bpl)
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{
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int ret = 0;
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dma_addr_t dma_addr;
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dma_addr_t data_dma_addr;
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cx25821_free_memory_audio(dev);
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dev->_risc_virt_addr =
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pci_alloc_consistent(dev->pci, dev->audio_upstream_riscbuf_size,
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&dma_addr);
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dev->_risc_virt_start_addr = dev->_risc_virt_addr;
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dev->_risc_phys_start_addr = dma_addr;
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dev->_risc_phys_addr = dma_addr;
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dev->_audiorisc_size = dev->audio_upstream_riscbuf_size;
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if (!dev->_risc_virt_addr) {
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printk(KERN_DEBUG
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"cx25821 ERROR: pci_alloc_consistent() FAILED to allocate memory for RISC program! Returning.\n");
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return -ENOMEM;
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}
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/* Clear out memory at address */
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memset(dev->_risc_virt_addr, 0, dev->_audiorisc_size);
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/* For Audio Data buffer allocation */
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dev->_audiodata_buf_virt_addr =
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pci_alloc_consistent(dev->pci, dev->audio_upstream_databuf_size,
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&data_dma_addr);
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dev->_audiodata_buf_phys_addr = data_dma_addr;
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dev->_audiodata_buf_size = dev->audio_upstream_databuf_size;
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if (!dev->_audiodata_buf_virt_addr) {
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printk(KERN_DEBUG
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"cx25821 ERROR: pci_alloc_consistent() FAILED to allocate memory for data buffer! Returning.\n");
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return -ENOMEM;
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}
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/* Clear out memory at address */
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memset(dev->_audiodata_buf_virt_addr, 0, dev->_audiodata_buf_size);
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ret = cx25821_openfile_audio(dev, sram_ch);
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if (ret < 0)
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return ret;
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/* Creating RISC programs */
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ret =
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cx25821_risc_buffer_upstream_audio(dev, dev->pci, bpl,
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dev->_audio_lines_count);
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if (ret < 0) {
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printk(KERN_DEBUG
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"cx25821 ERROR creating audio upstream RISC programs!\n");
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goto error;
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}
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return 0;
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error:
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return ret;
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}
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int cx25821_audio_upstream_irq(struct cx25821_dev *dev, int chan_num,
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u32 status)
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{
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int i = 0;
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u32 int_msk_tmp;
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struct sram_channel *channel = &dev->sram_channels[chan_num];
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dma_addr_t risc_phys_jump_addr;
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__le32 *rp;
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if (status & FLD_AUD_SRC_RISCI1) {
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/* Get interrupt_index of the program that interrupted */
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u32 prog_cnt = cx_read(channel->gpcnt);
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/* Since we've identified our IRQ, clear our bits from the
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* interrupt mask and interrupt status registers */
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cx_write(channel->int_msk, 0);
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cx_write(channel->int_stat, cx_read(channel->int_stat));
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spin_lock(&dev->slock);
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while (prog_cnt != dev->_last_index_irq) {
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/* Update _last_index_irq */
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if (dev->_last_index_irq < (NUMBER_OF_PROGRAMS - 1))
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dev->_last_index_irq++;
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else
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dev->_last_index_irq = 0;
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dev->_audioframe_index = dev->_last_index_irq;
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queue_work(dev->_irq_audio_queues,
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&dev->_audio_work_entry);
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}
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if (dev->_is_first_audio_frame) {
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dev->_is_first_audio_frame = 0;
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if (dev->_risc_virt_start_addr != NULL) {
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risc_phys_jump_addr =
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dev->_risc_phys_start_addr +
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RISC_SYNC_INSTRUCTION_SIZE +
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AUDIO_RISC_DMA_BUF_SIZE;
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rp = cx25821_risc_field_upstream_audio(dev,
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dev->
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_risc_virt_start_addr
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+ 1,
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dev->
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_audiodata_buf_phys_addr,
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AUDIO_LINE_SIZE,
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FIFO_DISABLE);
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if (USE_RISC_NOOP_AUDIO) {
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for (i = 0; i < NUM_NO_OPS; i++) {
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*(rp++) =
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cpu_to_le32(RISC_NOOP);
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}
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}
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/* Jump to 2nd Audio Frame */
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*(rp++) =
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cpu_to_le32(RISC_JUMP | RISC_IRQ1 |
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RISC_CNT_RESET);
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*(rp++) = cpu_to_le32(risc_phys_jump_addr);
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*(rp++) = cpu_to_le32(0);
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}
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}
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spin_unlock(&dev->slock);
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} else {
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if (status & FLD_AUD_SRC_OF)
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printk("%s: Audio Received Overflow Error Interrupt!\n",
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__func__);
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if (status & FLD_AUD_SRC_SYNC)
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printk("%s: Audio Received Sync Error Interrupt!\n",
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__func__);
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if (status & FLD_AUD_SRC_OPC_ERR)
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printk("%s: Audio Received OpCode Error Interrupt!\n",
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__func__);
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/* Read and write back the interrupt status register to clear
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* our bits */
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cx_write(channel->int_stat, cx_read(channel->int_stat));
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}
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if (dev->_audiofile_status == END_OF_FILE) {
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printk("cx25821: EOF Channel Audio Framecount = %d\n",
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dev->_audioframe_count);
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return -1;
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}
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/* ElSE, set the interrupt mask register, re-enable irq. */
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int_msk_tmp = cx_read(channel->int_msk);
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cx_write(channel->int_msk, int_msk_tmp |= _intr_msk);
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return 0;
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}
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static irqreturn_t cx25821_upstream_irq_audio(int irq, void *dev_id)
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{
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struct cx25821_dev *dev = dev_id;
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u32 msk_stat, audio_status;
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int handled = 0;
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struct sram_channel *sram_ch;
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if (!dev)
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return -1;
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sram_ch = &dev->sram_channels[dev->_audio_upstream_channel_select];
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msk_stat = cx_read(sram_ch->int_mstat);
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audio_status = cx_read(sram_ch->int_stat);
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/* Only deal with our interrupt */
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if (audio_status) {
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handled =
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cx25821_audio_upstream_irq(dev,
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dev->
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_audio_upstream_channel_select,
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audio_status);
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}
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if (handled < 0)
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cx25821_stop_upstream_audio(dev);
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else
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handled += handled;
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return IRQ_RETVAL(handled);
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}
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static void cx25821_wait_fifo_enable(struct cx25821_dev *dev,
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struct sram_channel *sram_ch)
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{
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int count = 0;
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u32 tmp;
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do {
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/* Wait 10 microsecond before checking to see if the FIFO is
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* turned ON. */
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udelay(10);
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tmp = cx_read(sram_ch->dma_ctl);
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/* 10 millisecond timeout */
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if (count++ > 1000) {
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printk
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("cx25821 ERROR: %s() fifo is NOT turned on. Timeout!\n",
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__func__);
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return;
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}
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} while (!(tmp & sram_ch->fld_aud_fifo_en));
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}
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int cx25821_start_audio_dma_upstream(struct cx25821_dev *dev,
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struct sram_channel *sram_ch)
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{
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u32 tmp = 0;
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int err = 0;
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/* Set the physical start address of the RISC program in the initial
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* program counter(IPC) member of the CMDS. */
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cx_write(sram_ch->cmds_start + 0, dev->_risc_phys_addr);
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/* Risc IPC High 64 bits 63-32 */
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cx_write(sram_ch->cmds_start + 4, 0);
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/* reset counter */
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cx_write(sram_ch->gpcnt_ctl, 3);
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/* Set the line length (It looks like we do not need to set the
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* line length) */
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cx_write(sram_ch->aud_length, AUDIO_LINE_SIZE & FLD_AUD_DST_LN_LNGTH);
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/* Set the input mode to 16-bit */
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tmp = cx_read(sram_ch->aud_cfg);
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tmp |=
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FLD_AUD_SRC_ENABLE | FLD_AUD_DST_PK_MODE | FLD_AUD_CLK_ENABLE |
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FLD_AUD_MASTER_MODE | FLD_AUD_CLK_SELECT_PLL_D | FLD_AUD_SONY_MODE;
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cx_write(sram_ch->aud_cfg, tmp);
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/* Read and write back the interrupt status register to clear it */
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tmp = cx_read(sram_ch->int_stat);
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cx_write(sram_ch->int_stat, tmp);
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/* Clear our bits from the interrupt status register. */
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cx_write(sram_ch->int_stat, _intr_msk);
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/* Set the interrupt mask register, enable irq. */
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cx_set(PCI_INT_MSK, cx_read(PCI_INT_MSK) | (1 << sram_ch->irq_bit));
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tmp = cx_read(sram_ch->int_msk);
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cx_write(sram_ch->int_msk, tmp |= _intr_msk);
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err =
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request_irq(dev->pci->irq, cx25821_upstream_irq_audio,
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IRQF_SHARED | IRQF_DISABLED, dev->name, dev);
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if (err < 0) {
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printk(KERN_ERR "%s: can't get upstream IRQ %d\n", dev->name,
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dev->pci->irq);
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goto fail_irq;
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}
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/* Start the DMA engine */
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tmp = cx_read(sram_ch->dma_ctl);
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cx_set(sram_ch->dma_ctl, tmp | sram_ch->fld_aud_risc_en);
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dev->_audio_is_running = 1;
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dev->_is_first_audio_frame = 1;
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/* The fifo_en bit turns on by the first Risc program */
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cx25821_wait_fifo_enable(dev, sram_ch);
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return 0;
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fail_irq:
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cx25821_dev_unregister(dev);
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return err;
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}
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int cx25821_audio_upstream_init(struct cx25821_dev *dev, int channel_select)
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{
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struct sram_channel *sram_ch;
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int retval = 0;
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int err = 0;
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int str_length = 0;
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if (dev->_audio_is_running) {
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printk("Audio Channel is still running so return!\n");
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return 0;
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}
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dev->_audio_upstream_channel_select = channel_select;
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sram_ch = &dev->sram_channels[channel_select];
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/* Work queue */
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INIT_WORK(&dev->_audio_work_entry, cx25821_audioups_handler);
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dev->_irq_audio_queues =
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create_singlethread_workqueue("cx25821_audioworkqueue");
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if (!dev->_irq_audio_queues) {
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printk(KERN_DEBUG
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"cx25821 ERROR: create_singlethread_workqueue() for Audio FAILED!\n");
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return -ENOMEM;
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}
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dev->_last_index_irq = 0;
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dev->_audio_is_running = 0;
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dev->_audioframe_count = 0;
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dev->_audiofile_status = RESET_STATUS;
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dev->_audio_lines_count = LINES_PER_AUDIO_BUFFER;
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_line_size = AUDIO_LINE_SIZE;
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if (dev->input_audiofilename) {
|
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str_length = strlen(dev->input_audiofilename);
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dev->_audiofilename = kmalloc(str_length + 1, GFP_KERNEL);
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|
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if (!dev->_audiofilename)
|
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goto error;
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|
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memcpy(dev->_audiofilename, dev->input_audiofilename,
|
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str_length + 1);
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/* Default if filename is empty string */
|
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if (strcmp(dev->input_audiofilename, "") == 0) {
|
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dev->_audiofilename = "/root/audioGOOD.wav";
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}
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} else {
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str_length = strlen(_defaultAudioName);
|
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dev->_audiofilename = kmalloc(str_length + 1, GFP_KERNEL);
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|
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if (!dev->_audiofilename)
|
|
goto error;
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|
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memcpy(dev->_audiofilename, _defaultAudioName, str_length + 1);
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}
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|
|
retval =
|
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cx25821_sram_channel_setup_upstream_audio(dev, sram_ch, _line_size,
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0);
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|
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dev->audio_upstream_riscbuf_size =
|
|
AUDIO_RISC_DMA_BUF_SIZE * NUM_AUDIO_PROGS +
|
|
RISC_SYNC_INSTRUCTION_SIZE;
|
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dev->audio_upstream_databuf_size = AUDIO_DATA_BUF_SZ * NUM_AUDIO_PROGS;
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/* Allocating buffers and prepare RISC program */
|
|
retval =
|
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cx25821_audio_upstream_buffer_prepare(dev, sram_ch, _line_size);
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if (retval < 0) {
|
|
printk(KERN_ERR
|
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"%s: Failed to set up Audio upstream buffers!\n",
|
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dev->name);
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goto error;
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}
|
|
/* Start RISC engine */
|
|
cx25821_start_audio_dma_upstream(dev, sram_ch);
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return 0;
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error:
|
|
cx25821_dev_unregister(dev);
|
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|
|
return err;
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|
}
|