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path: root/drivers/media/pci/cx25821/cx25821-audio-upstream.c
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Diffstat (limited to 'drivers/media/pci/cx25821/cx25821-audio-upstream.c')
-rw-r--r--drivers/media/pci/cx25821/cx25821-audio-upstream.c778
1 files changed, 778 insertions, 0 deletions
diff --git a/drivers/media/pci/cx25821/cx25821-audio-upstream.c b/drivers/media/pci/cx25821/cx25821-audio-upstream.c
new file mode 100644
index 000000000000..8b2a99975c23
--- /dev/null
+++ b/drivers/media/pci/cx25821/cx25821-audio-upstream.c
@@ -0,0 +1,778 @@
+/*
+ * Driver for the Conexant CX25821 PCIe bridge
+ *
+ * Copyright (C) 2009 Conexant Systems Inc.
+ * Authors <hiep.huynh@conexant.com>, <shu.lin@conexant.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.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include "cx25821-video.h"
+#include "cx25821-audio-upstream.h"
+
+#include <linux/fs.h>
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/syscalls.h>
+#include <linux/file.h>
+#include <linux/fcntl.h>
+#include <linux/delay.h>
+#include <linux/slab.h>
+#include <linux/uaccess.h>
+
+MODULE_DESCRIPTION("v4l2 driver module for cx25821 based TV cards");
+MODULE_AUTHOR("Hiep Huynh <hiep.huynh@conexant.com>");
+MODULE_LICENSE("GPL");
+
+static int _intr_msk = FLD_AUD_SRC_RISCI1 | FLD_AUD_SRC_OF |
+ FLD_AUD_SRC_SYNC | FLD_AUD_SRC_OPC_ERR;
+
+int cx25821_sram_channel_setup_upstream_audio(struct cx25821_dev *dev,
+ struct sram_channel *ch,
+ unsigned int bpl, u32 risc)
+{
+ unsigned int i, lines;
+ u32 cdt;
+
+ if (ch->cmds_start == 0) {
+ cx_write(ch->ptr1_reg, 0);
+ cx_write(ch->ptr2_reg, 0);
+ cx_write(ch->cnt2_reg, 0);
+ cx_write(ch->cnt1_reg, 0);
+ return 0;
+ }
+
+ bpl = (bpl + 7) & ~7; /* alignment */
+ cdt = ch->cdt;
+ lines = ch->fifo_size / bpl;
+
+ if (lines > 3)
+ lines = 3;
+
+ BUG_ON(lines < 2);
+
+ /* write CDT */
+ for (i = 0; i < lines; i++) {
+ cx_write(cdt + 16 * i, ch->fifo_start + bpl * i);
+ cx_write(cdt + 16 * i + 4, 0);
+ cx_write(cdt + 16 * i + 8, 0);
+ cx_write(cdt + 16 * i + 12, 0);
+ }
+
+ /* write CMDS */
+ cx_write(ch->cmds_start + 0, risc);
+
+ cx_write(ch->cmds_start + 4, 0);
+ cx_write(ch->cmds_start + 8, cdt);
+ cx_write(ch->cmds_start + 12, AUDIO_CDT_SIZE_QW);
+ cx_write(ch->cmds_start + 16, ch->ctrl_start);
+
+ /* IQ size */
+ cx_write(ch->cmds_start + 20, AUDIO_IQ_SIZE_DW);
+
+ for (i = 24; i < 80; i += 4)
+ cx_write(ch->cmds_start + i, 0);
+
+ /* fill registers */
+ cx_write(ch->ptr1_reg, ch->fifo_start);
+ cx_write(ch->ptr2_reg, cdt);
+ cx_write(ch->cnt2_reg, AUDIO_CDT_SIZE_QW);
+ cx_write(ch->cnt1_reg, AUDIO_CLUSTER_SIZE_QW - 1);
+
+ return 0;
+}
+
+static __le32 *cx25821_risc_field_upstream_audio(struct cx25821_dev *dev,
+ __le32 *rp,
+ dma_addr_t databuf_phys_addr,
+ unsigned int bpl,
+ int fifo_enable)
+{
+ unsigned int line;
+ struct sram_channel *sram_ch =
+ dev->channels[dev->_audio_upstream_channel].sram_channels;
+ int offset = 0;
+
+ /* scan lines */
+ for (line = 0; line < LINES_PER_AUDIO_BUFFER; line++) {
+ *(rp++) = cpu_to_le32(RISC_READ | RISC_SOL | RISC_EOL | bpl);
+ *(rp++) = cpu_to_le32(databuf_phys_addr + offset);
+ *(rp++) = cpu_to_le32(0); /* bits 63-32 */
+
+ /* Check if we need to enable the FIFO
+ * after the first 3 lines.
+ * For the upstream audio channel,
+ * the risc engine will enable the FIFO */
+ if (fifo_enable && line == 2) {
+ *(rp++) = RISC_WRITECR;
+ *(rp++) = sram_ch->dma_ctl;
+ *(rp++) = sram_ch->fld_aud_fifo_en;
+ *(rp++) = 0x00000020;
+ }
+
+ offset += AUDIO_LINE_SIZE;
+ }
+
+ return rp;
+}
+
+int cx25821_risc_buffer_upstream_audio(struct cx25821_dev *dev,
+ struct pci_dev *pci,
+ unsigned int bpl, unsigned int lines)
+{
+ __le32 *rp;
+ int fifo_enable = 0;
+ int frame = 0, i = 0;
+ int frame_size = AUDIO_DATA_BUF_SZ;
+ int databuf_offset = 0;
+ int risc_flag = RISC_CNT_INC;
+ dma_addr_t risc_phys_jump_addr;
+
+ /* Virtual address of Risc buffer program */
+ rp = dev->_risc_virt_addr;
+
+ /* sync instruction */
+ *(rp++) = cpu_to_le32(RISC_RESYNC | AUDIO_SYNC_LINE);
+
+ for (frame = 0; frame < NUM_AUDIO_FRAMES; frame++) {
+ databuf_offset = frame_size * frame;
+
+ if (frame == 0) {
+ fifo_enable = 1;
+ risc_flag = RISC_CNT_RESET;
+ } else {
+ fifo_enable = 0;
+ risc_flag = RISC_CNT_INC;
+ }
+
+ /* Calculate physical jump address */
+ if ((frame + 1) == NUM_AUDIO_FRAMES) {
+ risc_phys_jump_addr =
+ dev->_risc_phys_start_addr +
+ RISC_SYNC_INSTRUCTION_SIZE;
+ } else {
+ risc_phys_jump_addr =
+ dev->_risc_phys_start_addr +
+ RISC_SYNC_INSTRUCTION_SIZE +
+ AUDIO_RISC_DMA_BUF_SIZE * (frame + 1);
+ }
+
+ rp = cx25821_risc_field_upstream_audio(dev, rp,
+ dev->_audiodata_buf_phys_addr + databuf_offset,
+ bpl, fifo_enable);
+
+ if (USE_RISC_NOOP_AUDIO) {
+ for (i = 0; i < NUM_NO_OPS; i++)
+ *(rp++) = cpu_to_le32(RISC_NOOP);
+ }
+
+ /* Loop to (Nth)FrameRISC or to Start of Risc program &
+ * generate IRQ */
+ *(rp++) = cpu_to_le32(RISC_JUMP | RISC_IRQ1 | risc_flag);
+ *(rp++) = cpu_to_le32(risc_phys_jump_addr);
+ *(rp++) = cpu_to_le32(0);
+
+ /* Recalculate virtual address based on frame index */
+ rp = dev->_risc_virt_addr + RISC_SYNC_INSTRUCTION_SIZE / 4 +
+ (AUDIO_RISC_DMA_BUF_SIZE * (frame + 1) / 4);
+ }
+
+ return 0;
+}
+
+void cx25821_free_memory_audio(struct cx25821_dev *dev)
+{
+ if (dev->_risc_virt_addr) {
+ pci_free_consistent(dev->pci, dev->_audiorisc_size,
+ dev->_risc_virt_addr, dev->_risc_phys_addr);
+ dev->_risc_virt_addr = NULL;
+ }
+
+ if (dev->_audiodata_buf_virt_addr) {
+ pci_free_consistent(dev->pci, dev->_audiodata_buf_size,
+ dev->_audiodata_buf_virt_addr,
+ dev->_audiodata_buf_phys_addr);
+ dev->_audiodata_buf_virt_addr = NULL;
+ }
+}
+
+void cx25821_stop_upstream_audio(struct cx25821_dev *dev)
+{
+ struct sram_channel *sram_ch =
+ dev->channels[AUDIO_UPSTREAM_SRAM_CHANNEL_B].sram_channels;
+ u32 tmp = 0;
+
+ if (!dev->_audio_is_running) {
+ printk(KERN_DEBUG
+ pr_fmt("No audio file is currently running so return!\n"));
+ return;
+ }
+ /* Disable RISC interrupts */
+ cx_write(sram_ch->int_msk, 0);
+
+ /* Turn OFF risc and fifo enable in AUD_DMA_CNTRL */
+ tmp = cx_read(sram_ch->dma_ctl);
+ cx_write(sram_ch->dma_ctl,
+ tmp & ~(sram_ch->fld_aud_fifo_en | sram_ch->fld_aud_risc_en));
+
+ /* Clear data buffer memory */
+ if (dev->_audiodata_buf_virt_addr)
+ memset(dev->_audiodata_buf_virt_addr, 0,
+ dev->_audiodata_buf_size);
+
+ dev->_audio_is_running = 0;
+ dev->_is_first_audio_frame = 0;
+ dev->_audioframe_count = 0;
+ dev->_audiofile_status = END_OF_FILE;
+
+ kfree(dev->_irq_audio_queues);
+ dev->_irq_audio_queues = NULL;
+
+ kfree(dev->_audiofilename);
+}
+
+void cx25821_free_mem_upstream_audio(struct cx25821_dev *dev)
+{
+ if (dev->_audio_is_running)
+ cx25821_stop_upstream_audio(dev);
+
+ cx25821_free_memory_audio(dev);
+}
+
+int cx25821_get_audio_data(struct cx25821_dev *dev,
+ struct sram_channel *sram_ch)
+{
+ struct file *myfile;
+ int frame_index_temp = dev->_audioframe_index;
+ int i = 0;
+ int line_size = AUDIO_LINE_SIZE;
+ int frame_size = AUDIO_DATA_BUF_SZ;
+ int frame_offset = frame_size * frame_index_temp;
+ ssize_t vfs_read_retval = 0;
+ char mybuf[line_size];
+ loff_t file_offset = dev->_audioframe_count * frame_size;
+ loff_t pos;
+ mm_segment_t old_fs;
+
+ if (dev->_audiofile_status == END_OF_FILE)
+ return 0;
+
+ myfile = filp_open(dev->_audiofilename, O_RDONLY | O_LARGEFILE, 0);
+
+ if (IS_ERR(myfile)) {
+ const int open_errno = -PTR_ERR(myfile);
+ pr_err("%s(): ERROR opening file(%s) with errno = %d!\n",
+ __func__, dev->_audiofilename, open_errno);
+ return PTR_ERR(myfile);
+ } else {
+ if (!(myfile->f_op)) {
+ pr_err("%s(): File has no file operations registered!\n",
+ __func__);
+ filp_close(myfile, NULL);
+ return -EIO;
+ }
+
+ if (!myfile->f_op->read) {
+ pr_err("%s(): File has no READ operations registered!\n",
+ __func__);
+ filp_close(myfile, NULL);
+ return -EIO;
+ }
+
+ pos = myfile->f_pos;
+ old_fs = get_fs();
+ set_fs(KERNEL_DS);
+
+ for (i = 0; i < dev->_audio_lines_count; i++) {
+ pos = file_offset;
+
+ vfs_read_retval = vfs_read(myfile, mybuf, line_size,
+ &pos);
+
+ if (vfs_read_retval > 0 && vfs_read_retval == line_size
+ && dev->_audiodata_buf_virt_addr != NULL) {
+ memcpy((void *)(dev->_audiodata_buf_virt_addr +
+ frame_offset / 4), mybuf,
+ vfs_read_retval);
+ }
+
+ file_offset += vfs_read_retval;
+ frame_offset += vfs_read_retval;
+
+ if (vfs_read_retval < line_size) {
+ pr_info("Done: exit %s() since no more bytes to read from Audio file\n",
+ __func__);
+ break;
+ }
+ }
+
+ if (i > 0)
+ dev->_audioframe_count++;
+
+ dev->_audiofile_status = (vfs_read_retval == line_size) ?
+ IN_PROGRESS : END_OF_FILE;
+
+ set_fs(old_fs);
+ filp_close(myfile, NULL);
+ }
+
+ return 0;
+}
+
+static void cx25821_audioups_handler(struct work_struct *work)
+{
+ struct cx25821_dev *dev = container_of(work, struct cx25821_dev,
+ _audio_work_entry);
+
+ if (!dev) {
+ pr_err("ERROR %s(): since container_of(work_struct) FAILED!\n",
+ __func__);
+ return;
+ }
+
+ cx25821_get_audio_data(dev, dev->channels[dev->_audio_upstream_channel].
+ sram_channels);
+}
+
+int cx25821_openfile_audio(struct cx25821_dev *dev,
+ struct sram_channel *sram_ch)
+{
+ struct file *myfile;
+ int i = 0, j = 0;
+ int line_size = AUDIO_LINE_SIZE;
+ ssize_t vfs_read_retval = 0;
+ char mybuf[line_size];
+ loff_t pos;
+ loff_t offset = (unsigned long)0;
+ mm_segment_t old_fs;
+
+ myfile = filp_open(dev->_audiofilename, O_RDONLY | O_LARGEFILE, 0);
+
+ if (IS_ERR(myfile)) {
+ const int open_errno = -PTR_ERR(myfile);
+ pr_err("%s(): ERROR opening file(%s) with errno = %d!\n",
+ __func__, dev->_audiofilename, open_errno);
+ return PTR_ERR(myfile);
+ } else {
+ if (!(myfile->f_op)) {
+ pr_err("%s(): File has no file operations registered!\n",
+ __func__);
+ filp_close(myfile, NULL);
+ return -EIO;
+ }
+
+ if (!myfile->f_op->read) {
+ pr_err("%s(): File has no READ operations registered!\n",
+ __func__);
+ filp_close(myfile, NULL);
+ return -EIO;
+ }
+
+ pos = myfile->f_pos;
+ old_fs = get_fs();
+ set_fs(KERNEL_DS);
+
+ for (j = 0; j < NUM_AUDIO_FRAMES; j++) {
+ for (i = 0; i < dev->_audio_lines_count; i++) {
+ pos = offset;
+
+ vfs_read_retval = vfs_read(myfile, mybuf,
+ line_size, &pos);
+
+ if (vfs_read_retval > 0 &&
+ vfs_read_retval == line_size &&
+ dev->_audiodata_buf_virt_addr != NULL) {
+ memcpy((void *)(dev->
+ _audiodata_buf_virt_addr
+ + offset / 4), mybuf,
+ vfs_read_retval);
+ }
+
+ offset += vfs_read_retval;
+
+ if (vfs_read_retval < line_size) {
+ pr_info("Done: exit %s() since no more bytes to read from Audio file\n",
+ __func__);
+ break;
+ }
+ }
+
+ if (i > 0)
+ dev->_audioframe_count++;
+
+ if (vfs_read_retval < line_size)
+ break;
+ }
+
+ dev->_audiofile_status = (vfs_read_retval == line_size) ?
+ IN_PROGRESS : END_OF_FILE;
+
+ set_fs(old_fs);
+ myfile->f_pos = 0;
+ filp_close(myfile, NULL);
+ }
+
+ return 0;
+}
+
+static int cx25821_audio_upstream_buffer_prepare(struct cx25821_dev *dev,
+ struct sram_channel *sram_ch,
+ int bpl)
+{
+ int ret = 0;
+ dma_addr_t dma_addr;
+ dma_addr_t data_dma_addr;
+
+ cx25821_free_memory_audio(dev);
+
+ dev->_risc_virt_addr = pci_alloc_consistent(dev->pci,
+ dev->audio_upstream_riscbuf_size, &dma_addr);
+ dev->_risc_virt_start_addr = dev->_risc_virt_addr;
+ dev->_risc_phys_start_addr = dma_addr;
+ dev->_risc_phys_addr = dma_addr;
+ dev->_audiorisc_size = dev->audio_upstream_riscbuf_size;
+
+ if (!dev->_risc_virt_addr) {
+ printk(KERN_DEBUG
+ pr_fmt("ERROR: pci_alloc_consistent() FAILED to allocate memory for RISC program! Returning\n"));
+ return -ENOMEM;
+ }
+ /* Clear out memory at address */
+ memset(dev->_risc_virt_addr, 0, dev->_audiorisc_size);
+
+ /* For Audio Data buffer allocation */
+ dev->_audiodata_buf_virt_addr = pci_alloc_consistent(dev->pci,
+ dev->audio_upstream_databuf_size, &data_dma_addr);
+ dev->_audiodata_buf_phys_addr = data_dma_addr;
+ dev->_audiodata_buf_size = dev->audio_upstream_databuf_size;
+
+ if (!dev->_audiodata_buf_virt_addr) {
+ printk(KERN_DEBUG
+ pr_fmt("ERROR: pci_alloc_consistent() FAILED to allocate memory for data buffer! Returning\n"));
+ return -ENOMEM;
+ }
+ /* Clear out memory at address */
+ memset(dev->_audiodata_buf_virt_addr, 0, dev->_audiodata_buf_size);
+
+ ret = cx25821_openfile_audio(dev, sram_ch);
+ if (ret < 0)
+ return ret;
+
+ /* Creating RISC programs */
+ ret = cx25821_risc_buffer_upstream_audio(dev, dev->pci, bpl,
+ dev->_audio_lines_count);
+ if (ret < 0) {
+ printk(KERN_DEBUG
+ pr_fmt("ERROR creating audio upstream RISC programs!\n"));
+ goto error;
+ }
+
+ return 0;
+
+error:
+ return ret;
+}
+
+int cx25821_audio_upstream_irq(struct cx25821_dev *dev, int chan_num,
+ u32 status)
+{
+ int i = 0;
+ u32 int_msk_tmp;
+ struct sram_channel *channel = dev->channels[chan_num].sram_channels;
+ dma_addr_t risc_phys_jump_addr;
+ __le32 *rp;
+
+ if (status & FLD_AUD_SRC_RISCI1) {
+ /* Get interrupt_index of the program that interrupted */
+ u32 prog_cnt = cx_read(channel->gpcnt);
+
+ /* Since we've identified our IRQ, clear our bits from the
+ * interrupt mask and interrupt status registers */
+ cx_write(channel->int_msk, 0);
+ cx_write(channel->int_stat, cx_read(channel->int_stat));
+
+ spin_lock(&dev->slock);
+
+ while (prog_cnt != dev->_last_index_irq) {
+ /* Update _last_index_irq */
+ if (dev->_last_index_irq < (NUMBER_OF_PROGRAMS - 1))
+ dev->_last_index_irq++;
+ else
+ dev->_last_index_irq = 0;
+
+ dev->_audioframe_index = dev->_last_index_irq;
+
+ queue_work(dev->_irq_audio_queues,
+ &dev->_audio_work_entry);
+ }
+
+ if (dev->_is_first_audio_frame) {
+ dev->_is_first_audio_frame = 0;
+
+ if (dev->_risc_virt_start_addr != NULL) {
+ risc_phys_jump_addr =
+ dev->_risc_phys_start_addr +
+ RISC_SYNC_INSTRUCTION_SIZE +
+ AUDIO_RISC_DMA_BUF_SIZE;
+
+ rp = cx25821_risc_field_upstream_audio(dev,
+ dev->_risc_virt_start_addr + 1,
+ dev->_audiodata_buf_phys_addr,
+ AUDIO_LINE_SIZE, FIFO_DISABLE);
+
+ if (USE_RISC_NOOP_AUDIO) {
+ for (i = 0; i < NUM_NO_OPS; i++) {
+ *(rp++) =
+ cpu_to_le32(RISC_NOOP);
+ }
+ }
+ /* Jump to 2nd Audio Frame */
+ *(rp++) = cpu_to_le32(RISC_JUMP | RISC_IRQ1 |
+ RISC_CNT_RESET);
+ *(rp++) = cpu_to_le32(risc_phys_jump_addr);
+ *(rp++) = cpu_to_le32(0);
+ }
+ }
+
+ spin_unlock(&dev->slock);
+ } else {
+ if (status & FLD_AUD_SRC_OF)
+ pr_warn("%s(): Audio Received Overflow Error Interrupt!\n",
+ __func__);
+
+ if (status & FLD_AUD_SRC_SYNC)
+ pr_warn("%s(): Audio Received Sync Error Interrupt!\n",
+ __func__);
+
+ if (status & FLD_AUD_SRC_OPC_ERR)
+ pr_warn("%s(): Audio Received OpCode Error Interrupt!\n",
+ __func__);
+
+ /* Read and write back the interrupt status register to clear
+ * our bits */
+ cx_write(channel->int_stat, cx_read(channel->int_stat));
+ }
+
+ if (dev->_audiofile_status == END_OF_FILE) {
+ pr_warn("EOF Channel Audio Framecount = %d\n",
+ dev->_audioframe_count);
+ return -1;
+ }
+ /* ElSE, set the interrupt mask register, re-enable irq. */
+ int_msk_tmp = cx_read(channel->int_msk);
+ cx_write(channel->int_msk, int_msk_tmp |= _intr_msk);
+
+ return 0;
+}
+
+static irqreturn_t cx25821_upstream_irq_audio(int irq, void *dev_id)
+{
+ struct cx25821_dev *dev = dev_id;
+ u32 audio_status;
+ int handled = 0;
+ struct sram_channel *sram_ch;
+
+ if (!dev)
+ return -1;
+
+ sram_ch = dev->channels[dev->_audio_upstream_channel].sram_channels;
+
+ audio_status = cx_read(sram_ch->int_stat);
+
+ /* Only deal with our interrupt */
+ if (audio_status) {
+ handled = cx25821_audio_upstream_irq(dev,
+ dev->_audio_upstream_channel, audio_status);
+ }
+
+ if (handled < 0)
+ cx25821_stop_upstream_audio(dev);
+ else
+ handled += handled;
+
+ return IRQ_RETVAL(handled);
+}
+
+static void cx25821_wait_fifo_enable(struct cx25821_dev *dev,
+ struct sram_channel *sram_ch)
+{
+ int count = 0;
+ u32 tmp;
+
+ do {
+ /* Wait 10 microsecond before checking to see if the FIFO is
+ * turned ON. */
+ udelay(10);
+
+ tmp = cx_read(sram_ch->dma_ctl);
+
+ /* 10 millisecond timeout */
+ if (count++ > 1000) {
+ pr_err("ERROR: %s() fifo is NOT turned on. Timeout!\n",
+ __func__);
+ return;
+ }
+
+ } while (!(tmp & sram_ch->fld_aud_fifo_en));
+
+}
+
+int cx25821_start_audio_dma_upstream(struct cx25821_dev *dev,
+ struct sram_channel *sram_ch)
+{
+ u32 tmp = 0;
+ int err = 0;
+
+ /* Set the physical start address of the RISC program in the initial
+ * program counter(IPC) member of the CMDS. */
+ cx_write(sram_ch->cmds_start + 0, dev->_risc_phys_addr);
+ /* Risc IPC High 64 bits 63-32 */
+ cx_write(sram_ch->cmds_start + 4, 0);
+
+ /* reset counter */
+ cx_write(sram_ch->gpcnt_ctl, 3);
+
+ /* Set the line length (It looks like we do not need to set the
+ * line length) */
+ cx_write(sram_ch->aud_length, AUDIO_LINE_SIZE & FLD_AUD_DST_LN_LNGTH);
+
+ /* Set the input mode to 16-bit */
+ tmp = cx_read(sram_ch->aud_cfg);
+ tmp |= FLD_AUD_SRC_ENABLE | FLD_AUD_DST_PK_MODE | FLD_AUD_CLK_ENABLE |
+ FLD_AUD_MASTER_MODE | FLD_AUD_CLK_SELECT_PLL_D |
+ FLD_AUD_SONY_MODE;
+ cx_write(sram_ch->aud_cfg, tmp);
+
+ /* Read and write back the interrupt status register to clear it */
+ tmp = cx_read(sram_ch->int_stat);
+ cx_write(sram_ch->int_stat, tmp);
+
+ /* Clear our bits from the interrupt status register. */
+ cx_write(sram_ch->int_stat, _intr_msk);
+
+ /* Set the interrupt mask register, enable irq. */
+ cx_set(PCI_INT_MSK, cx_read(PCI_INT_MSK) | (1 << sram_ch->irq_bit));
+ tmp = cx_read(sram_ch->int_msk);
+ cx_write(sram_ch->int_msk, tmp |= _intr_msk);
+
+ err = request_irq(dev->pci->irq, cx25821_upstream_irq_audio,
+ IRQF_SHARED, dev->name, dev);
+ if (err < 0) {
+ pr_err("%s: can't get upstream IRQ %d\n", dev->name,
+ dev->pci->irq);
+ goto fail_irq;
+ }
+
+ /* Start the DMA engine */
+ tmp = cx_read(sram_ch->dma_ctl);
+ cx_set(sram_ch->dma_ctl, tmp | sram_ch->fld_aud_risc_en);
+
+ dev->_audio_is_running = 1;
+ dev->_is_first_audio_frame = 1;
+
+ /* The fifo_en bit turns on by the first Risc program */
+ cx25821_wait_fifo_enable(dev, sram_ch);
+
+ return 0;
+
+fail_irq:
+ cx25821_dev_unregister(dev);
+ return err;
+}
+
+int cx25821_audio_upstream_init(struct cx25821_dev *dev, int channel_select)
+{
+ struct sram_channel *sram_ch;
+ int retval = 0;
+ int err = 0;
+ int str_length = 0;
+
+ if (dev->_audio_is_running) {
+ pr_warn("Audio Channel is still running so return!\n");
+ return 0;
+ }
+
+ dev->_audio_upstream_channel = channel_select;
+ sram_ch = dev->channels[channel_select].sram_channels;
+
+ /* Work queue */
+ INIT_WORK(&dev->_audio_work_entry, cx25821_audioups_handler);
+ dev->_irq_audio_queues =
+ create_singlethread_workqueue("cx25821_audioworkqueue");
+
+ if (!dev->_irq_audio_queues) {
+ printk(KERN_DEBUG
+ pr_fmt("ERROR: create_singlethread_workqueue() for Audio FAILED!\n"));
+ return -ENOMEM;
+ }
+
+ dev->_last_index_irq = 0;
+ dev->_audio_is_running = 0;
+ dev->_audioframe_count = 0;
+ dev->_audiofile_status = RESET_STATUS;
+ dev->_audio_lines_count = LINES_PER_AUDIO_BUFFER;
+ _line_size = AUDIO_LINE_SIZE;
+
+ if (dev->input_audiofilename) {
+ str_length = strlen(dev->input_audiofilename);
+ dev->_audiofilename = kmemdup(dev->input_audiofilename,
+ str_length + 1, GFP_KERNEL);
+
+ if (!dev->_audiofilename)
+ goto error;
+
+ /* Default if filename is empty string */
+ if (strcmp(dev->input_audiofilename, "") == 0)
+ dev->_audiofilename = "/root/audioGOOD.wav";
+ } else {
+ str_length = strlen(_defaultAudioName);
+ dev->_audiofilename = kmemdup(_defaultAudioName,
+ str_length + 1, GFP_KERNEL);
+
+ if (!dev->_audiofilename)
+ goto error;
+ }
+
+ retval = cx25821_sram_channel_setup_upstream_audio(dev, sram_ch,
+ _line_size, 0);
+
+ dev->audio_upstream_riscbuf_size =
+ AUDIO_RISC_DMA_BUF_SIZE * NUM_AUDIO_PROGS +
+ RISC_SYNC_INSTRUCTION_SIZE;
+ dev->audio_upstream_databuf_size = AUDIO_DATA_BUF_SZ * NUM_AUDIO_PROGS;
+
+ /* Allocating buffers and prepare RISC program */
+ retval = cx25821_audio_upstream_buffer_prepare(dev, sram_ch,
+ _line_size);
+ if (retval < 0) {
+ pr_err("%s: Failed to set up Audio upstream buffers!\n",
+ dev->name);
+ goto error;
+ }
+ /* Start RISC engine */
+ cx25821_start_audio_dma_upstream(dev, sram_ch);
+
+ return 0;
+
+error:
+ cx25821_dev_unregister(dev);
+
+ return err;
+}

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