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ALSA: asihpi: Add support for stream interrupt.

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Some cards have a so-called low-latency mode, in which they present
a single multichannel stream with no mixing or samplerate conversion.
In this mode the card can generate an interrupt per internal processing
block (typically 32 or 64 frames)

Signed-off-by: Eliot Blennerhassett <eliot@blennerhassett.gen.nz>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Eliot Blennerhassett
2014-11-20 16:22:53 +13:00
committed by Takashi Iwai
parent c1464a8854
commit f9a376c3f6
6 changed files with 321 additions and 50 deletions
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43
sound/pci/asihpi/hpi6205.c
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@@ -1,7 +1,7 @@
/******************************************************************************
AudioScience HPI driver
Copyright (C) 1997-2011 AudioScience Inc. <support@audioscience.com>
Copyright (C) 1997-2014 AudioScience Inc. <support@audioscience.com>
This program is free software; you can redistribute it and/or modify
it under the terms of version 2 of the GNU General Public License as
@@ -163,6 +163,9 @@ static u16 create_adapter_obj(struct hpi_adapter_obj *pao,
static void delete_adapter_obj(struct hpi_adapter_obj *pao);
static int adapter_irq_query_and_clear(struct hpi_adapter_obj *pao,
u32 message);
static void outstream_host_buffer_allocate(struct hpi_adapter_obj *pao,
struct hpi_message *phm, struct hpi_response *phr);
@@ -283,7 +286,6 @@ static void adapter_message(struct hpi_adapter_obj *pao,
case HPI_ADAPTER_DELETE:
adapter_delete(pao, phm, phr);
break;
default:
hw_message(pao, phm, phr);
break;
@@ -673,6 +675,12 @@ static u16 create_adapter_obj(struct hpi_adapter_obj *pao,
HPI_DEBUG_LOG(INFO, "bootload DSP OK\n");
pao->irq_query_and_clear = adapter_irq_query_and_clear;
pao->instream_host_buffer_status =
phw->p_interface_buffer->instream_host_buffer_status;
pao->outstream_host_buffer_status =
phw->p_interface_buffer->outstream_host_buffer_status;
return hpi_add_adapter(pao);
}
@@ -713,6 +721,21 @@ static void delete_adapter_obj(struct hpi_adapter_obj *pao)
/*****************************************************************************/
/* Adapter functions */
static int adapter_irq_query_and_clear(struct hpi_adapter_obj *pao,
u32 message)
{
struct hpi_hw_obj *phw = pao->priv;
u32 hsr = 0;
hsr = ioread32(phw->prHSR);
if (hsr & C6205_HSR_INTSRC) {
/* reset the interrupt from the DSP */
iowrite32(C6205_HSR_INTSRC, phw->prHSR);
return HPI_IRQ_MIXER;
}
return HPI_IRQ_NONE;
}
/*****************************************************************************/
/* OutStream Host buffer functions */
@@ -1331,17 +1354,21 @@ static u16 adapter_boot_load_dsp(struct hpi_adapter_obj *pao,
if (boot_code_id[1] != 0) {
/* DSP 1 is a C6713 */
/* CLKX0 <- '1' release the C6205 bootmode pulldowns */
boot_loader_write_mem32(pao, 0, (0x018C0024L), 0x00002202);
boot_loader_write_mem32(pao, 0, 0x018C0024, 0x00002202);
hpios_delay_micro_seconds(100);
/* Reset the 6713 #1 - revB */
boot_loader_write_mem32(pao, 0, C6205_BAR0_TIMER1_CTL, 0);
/* dummy read every 4 words for 6205 advisory 1.4.4 */
boot_loader_read_mem32(pao, 0, 0);
/* value of bit 3 is unknown after DSP reset, other bits shoudl be 0 */
if (0 != (boot_loader_read_mem32(pao, 0,
(C6205_BAR0_TIMER1_CTL)) & ~8))
return HPI6205_ERROR_6205_REG;
hpios_delay_micro_seconds(100);
/* Release C6713 from reset - revB */
boot_loader_write_mem32(pao, 0, C6205_BAR0_TIMER1_CTL, 4);
if (4 != (boot_loader_read_mem32(pao, 0,
(C6205_BAR0_TIMER1_CTL)) & ~8))
return HPI6205_ERROR_6205_REG;
hpios_delay_micro_seconds(100);
}
@@ -2089,7 +2116,7 @@ static u16 message_response_sequence(struct hpi_adapter_obj *pao,
return 0;
}
/* Assume buffer of type struct bus_master_interface
/* Assume buffer of type struct bus_master_interface_62
is allocated "noncacheable" */
if (!wait_dsp_ack(phw, H620_HIF_IDLE, HPI6205_TIMEOUT)) {