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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.c222
1 files changed, 70 insertions, 152 deletions
diff --git a/drivers/media/pci/cx25821/cx25821-audio-upstream.c b/drivers/media/pci/cx25821/cx25821-audio-upstream.c
index 87491ca05ee5..68dbc2dbc982 100644
--- a/drivers/media/pci/cx25821/cx25821-audio-upstream.c
+++ b/drivers/media/pci/cx25821/cx25821-audio-upstream.c
@@ -45,7 +45,7 @@ static int _intr_msk = FLD_AUD_SRC_RISCI1 | FLD_AUD_SRC_OF |
FLD_AUD_SRC_SYNC | FLD_AUD_SRC_OPC_ERR;
static int cx25821_sram_channel_setup_upstream_audio(struct cx25821_dev *dev,
- struct sram_channel *ch,
+ const struct sram_channel *ch,
unsigned int bpl, u32 risc)
{
unsigned int i, lines;
@@ -106,7 +106,7 @@ static __le32 *cx25821_risc_field_upstream_audio(struct cx25821_dev *dev,
int fifo_enable)
{
unsigned int line;
- struct sram_channel *sram_ch =
+ const struct sram_channel *sram_ch =
dev->channels[dev->_audio_upstream_channel].sram_channels;
int offset = 0;
@@ -215,7 +215,7 @@ static void cx25821_free_memory_audio(struct cx25821_dev *dev)
void cx25821_stop_upstream_audio(struct cx25821_dev *dev)
{
- struct sram_channel *sram_ch =
+ const struct sram_channel *sram_ch =
dev->channels[AUDIO_UPSTREAM_SRAM_CHANNEL_B].sram_channels;
u32 tmp = 0;
@@ -257,81 +257,48 @@ void cx25821_free_mem_upstream_audio(struct cx25821_dev *dev)
}
static int cx25821_get_audio_data(struct cx25821_dev *dev,
- struct sram_channel *sram_ch)
+ const struct sram_channel *sram_ch)
{
- struct file *myfile;
+ struct file *file;
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];
+ char mybuf[AUDIO_LINE_SIZE];
loff_t file_offset = dev->_audioframe_count * frame_size;
- loff_t pos;
- mm_segment_t old_fs;
+ char *p = NULL;
if (dev->_audiofile_status == END_OF_FILE)
return 0;
- myfile = filp_open(dev->_audiofilename, O_RDONLY | O_LARGEFILE, 0);
+ file = filp_open(dev->_audiofilename, O_RDONLY | O_LARGEFILE, 0);
+ if (IS_ERR(file)) {
+ pr_err("%s(): ERROR opening file(%s) with errno = %ld!\n",
+ __func__, dev->_audiofilename, -PTR_ERR(file));
+ return PTR_ERR(file);
+ }
- 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 (dev->_audiodata_buf_virt_addr)
+ p = (char *)dev->_audiodata_buf_virt_addr + frame_offset;
- if (!myfile->f_op->read) {
- pr_err("%s(): File has no READ operations registered!\n",
+ for (i = 0; i < dev->_audio_lines_count; i++) {
+ int n = kernel_read(file, file_offset, mybuf, AUDIO_LINE_SIZE);
+ if (n < AUDIO_LINE_SIZE) {
+ pr_info("Done: exit %s() since no more bytes to read from Audio file\n",
__func__);
- filp_close(myfile, NULL);
- return -EIO;
+ dev->_audiofile_status = END_OF_FILE;
+ fput(file);
+ return 0;
}
-
- 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;
- }
+ dev->_audiofile_status = IN_PROGRESS;
+ if (p) {
+ memcpy(p, mybuf, n);
+ p += n;
}
-
- 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);
+ file_offset += n;
}
+ dev->_audioframe_count++;
+ fput(file);
return 0;
}
@@ -352,88 +319,48 @@ static void cx25821_audioups_handler(struct work_struct *work)
}
static int cx25821_openfile_audio(struct cx25821_dev *dev,
- struct sram_channel *sram_ch)
+ const 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);
- }
+ char *p = (void *)dev->_audiodata_buf_virt_addr;
+ struct file *file;
+ loff_t offset;
+ int i, j;
+
+ file = filp_open(dev->_audiofilename, O_RDONLY | O_LARGEFILE, 0);
+ if (IS_ERR(file)) {
+ pr_err("%s(): ERROR opening file(%s) with errno = %ld!\n",
+ __func__, dev->_audiofilename, PTR_ERR(file));
+ return PTR_ERR(file);
+ }
- offset += vfs_read_retval;
+ for (j = 0, offset = 0; j < NUM_AUDIO_FRAMES; j++) {
+ for (i = 0; i < dev->_audio_lines_count; i++) {
+ char buf[AUDIO_LINE_SIZE];
+ int n = kernel_read(file, offset, buf,
+ AUDIO_LINE_SIZE);
- if (vfs_read_retval < line_size) {
- pr_info("Done: exit %s() since no more bytes to read from Audio file\n",
- __func__);
- break;
- }
+ if (n < AUDIO_LINE_SIZE) {
+ pr_info("Done: exit %s() since no more bytes to read from Audio file\n",
+ __func__);
+ dev->_audiofile_status = END_OF_FILE;
+ fput(file);
+ return 0;
}
- if (i > 0)
- dev->_audioframe_count++;
+ if (p)
+ memcpy(p + offset, buf, n);
- if (vfs_read_retval < line_size)
- break;
+ offset += n;
}
-
- 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);
+ dev->_audioframe_count++;
}
-
+ dev->_audiofile_status = IN_PROGRESS;
+ fput(file);
return 0;
}
static int cx25821_audio_upstream_buffer_prepare(struct cx25821_dev *dev,
- struct sram_channel *sram_ch,
+ const struct sram_channel *sram_ch,
int bpl)
{
int ret = 0;
@@ -495,7 +422,7 @@ static int cx25821_audio_upstream_irq(struct cx25821_dev *dev, int chan_num,
{
int i = 0;
u32 int_msk_tmp;
- struct sram_channel *channel = dev->channels[chan_num].sram_channels;
+ const struct sram_channel *channel = dev->channels[chan_num].sram_channels;
dma_addr_t risc_phys_jump_addr;
__le32 *rp;
@@ -587,7 +514,7 @@ 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;
+ const struct sram_channel *sram_ch;
if (!dev)
return -1;
@@ -611,7 +538,7 @@ static irqreturn_t cx25821_upstream_irq_audio(int irq, void *dev_id)
}
static void cx25821_wait_fifo_enable(struct cx25821_dev *dev,
- struct sram_channel *sram_ch)
+ const struct sram_channel *sram_ch)
{
int count = 0;
u32 tmp;
@@ -635,7 +562,7 @@ static void cx25821_wait_fifo_enable(struct cx25821_dev *dev,
}
static int cx25821_start_audio_dma_upstream(struct cx25821_dev *dev,
- struct sram_channel *sram_ch)
+ const struct sram_channel *sram_ch)
{
u32 tmp = 0;
int err = 0;
@@ -699,7 +626,7 @@ fail_irq:
int cx25821_audio_upstream_init(struct cx25821_dev *dev, int channel_select)
{
- struct sram_channel *sram_ch;
+ const struct sram_channel *sram_ch;
int err = 0;
if (dev->_audio_is_running) {
@@ -728,26 +655,17 @@ int cx25821_audio_upstream_init(struct cx25821_dev *dev, int channel_select)
dev->_audio_lines_count = LINES_PER_AUDIO_BUFFER;
_line_size = AUDIO_LINE_SIZE;
- if (dev->input_audiofilename) {
+ if ((dev->input_audiofilename) &&
+ (strcmp(dev->input_audiofilename, "") != 0))
dev->_audiofilename = kstrdup(dev->input_audiofilename,
GFP_KERNEL);
-
- if (!dev->_audiofilename) {
- err = -ENOMEM;
- goto error;
- }
-
- /* Default if filename is empty string */
- if (strcmp(dev->input_audiofilename, "") == 0)
- dev->_audiofilename = "/root/audioGOOD.wav";
- } else {
+ else
dev->_audiofilename = kstrdup(_defaultAudioName,
GFP_KERNEL);
- if (!dev->_audiofilename) {
- err = -ENOMEM;
- goto error;
- }
+ if (!dev->_audiofilename) {
+ err = -ENOMEM;
+ goto error;
}
cx25821_sram_channel_setup_upstream_audio(dev, sram_ch,
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.