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goldfish: 64-bit audio driver for goldfish platform 

Enable the 64-bit goldfish audio driver.
Support 64-bit buffer address and data read/write.

Signed-off-by: Jun Tian <jun.j.tian@intel.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jun Tian 2014-04-28 20:47:03 +01:00 committed by Greg Kroah-Hartman
parent 10f62861b4
commit c3c1ba6640
1 changed files with 33 additions and 0 deletions
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33
drivers/staging/goldfish/goldfish_audio.c
View File

@ -78,11 +78,18 @@ enum {
/* set number of bytes in buffer to write */
AUDIO_WRITE_BUFFER_1 = 0x10,
AUDIO_WRITE_BUFFER_2 = 0x14,
#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
AUDIO_SET_WRITE_BUFFER_1_HIGH = 0x28,
AUDIO_SET_WRITE_BUFFER_2_HIGH = 0x30,
#endif
/* true if audio input is supported */
AUDIO_READ_SUPPORTED = 0x18,
/* buffer to use for audio input */
AUDIO_SET_READ_BUFFER = 0x1C,
#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
AUDIO_SET_READ_BUFFER_HIGH = 0x34,
#endif
/* driver writes number of bytes to read */
AUDIO_START_READ = 0x20,
@ -267,6 +274,9 @@ static int goldfish_audio_probe(struct platform_device *pdev)
struct resource *r;
struct goldfish_audio *data;
dma_addr_t buf_addr;
#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
u32 buf_addr_high, buf_addr_low;
#endif
data = kzalloc(sizeof(*data), GFP_KERNEL);
if (data == NULL) {
@ -322,6 +332,28 @@ static int goldfish_audio_probe(struct platform_device *pdev)
goto err_misc_register_failed;
}
#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
buf_addr_low = (u32)(buf_addr);
buf_addr_high = (u32)((buf_addr) >> 32);
AUDIO_WRITE(data, AUDIO_SET_WRITE_BUFFER_1, buf_addr_low);
AUDIO_WRITE(data, AUDIO_SET_WRITE_BUFFER_1_HIGH, buf_addr_high);
buf_addr_low = (u32)(buf_addr + WRITE_BUFFER_SIZE);
buf_addr_high = (u32)((buf_addr + WRITE_BUFFER_SIZE) >> 32);
AUDIO_WRITE(data, AUDIO_SET_WRITE_BUFFER_2, buf_addr_low);
AUDIO_WRITE(data, AUDIO_SET_WRITE_BUFFER_2_HIGH, buf_addr_high);
buf_addr_low = (u32)(buf_addr + 2 * WRITE_BUFFER_SIZE);
buf_addr_high = (u32)((buf_addr + 2 * WRITE_BUFFER_SIZE) >> 32);
data->read_supported = AUDIO_READ(data, AUDIO_READ_SUPPORTED);
if (data->read_supported){
AUDIO_WRITE(data, AUDIO_SET_READ_BUFFER, buf_addr_low);
AUDIO_WRITE(data, AUDIO_SET_READ_BUFFER_HIGH, buf_addr_high);
}
#else
AUDIO_WRITE(data, AUDIO_SET_WRITE_BUFFER_1, buf_addr);
AUDIO_WRITE(data, AUDIO_SET_WRITE_BUFFER_2,
buf_addr + WRITE_BUFFER_SIZE);
@ -330,6 +362,7 @@ static int goldfish_audio_probe(struct platform_device *pdev)
if (data->read_supported)
AUDIO_WRITE(data, AUDIO_SET_READ_BUFFER,
buf_addr + 2 * WRITE_BUFFER_SIZE);
#endif
audio_data = data;
return 0;