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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
commit | 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 (patch) | |
tree | a94efe259b9009378be6d90eb30d2b019d95c194 /sound/pci/asihpi/hpios.c | |
parent | Initial commit. (diff) | |
download | linux-5d1646d90e1f2cceb9f0828f4b28318cd0ec7744.tar.xz linux-5d1646d90e1f2cceb9f0828f4b28318cd0ec7744.zip |
Adding upstream version 5.10.209.upstream/5.10.209
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'sound/pci/asihpi/hpios.c')
-rw-r--r-- | sound/pci/asihpi/hpios.c | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/sound/pci/asihpi/hpios.c b/sound/pci/asihpi/hpios.c new file mode 100644 index 000000000..6fe60d13e --- /dev/null +++ b/sound/pci/asihpi/hpios.c @@ -0,0 +1,72 @@ +// SPDX-License-Identifier: GPL-2.0-only +/****************************************************************************** + + AudioScience HPI driver + Copyright (C) 1997-2012 AudioScience Inc. <support@audioscience.com> + + +HPI Operating System function implementation for Linux + +(C) Copyright AudioScience Inc. 1997-2003 +******************************************************************************/ +#define SOURCEFILE_NAME "hpios.c" +#include "hpi_internal.h" +#include "hpidebug.h" +#include <linux/delay.h> +#include <linux/sched.h> + +void hpios_delay_micro_seconds(u32 num_micro_sec) +{ + if ((usecs_to_jiffies(num_micro_sec) > 1) && !in_interrupt()) { + /* MUST NOT SCHEDULE IN INTERRUPT CONTEXT! */ + schedule_timeout_uninterruptible(usecs_to_jiffies + (num_micro_sec)); + } else if (num_micro_sec <= 2000) + udelay(num_micro_sec); + else + mdelay(num_micro_sec / 1000); + +} + +/** Allocate an area of locked memory for bus master DMA operations. + +If allocation fails, return 1, and *pMemArea.size = 0 +*/ +u16 hpios_locked_mem_alloc(struct consistent_dma_area *p_mem_area, u32 size, + struct pci_dev *pdev) +{ + /*?? any benefit in using managed dmam_alloc_coherent? */ + p_mem_area->vaddr = + dma_alloc_coherent(&pdev->dev, size, &p_mem_area->dma_handle, + GFP_KERNEL); + + if (p_mem_area->vaddr) { + HPI_DEBUG_LOG(DEBUG, "allocated %d bytes, dma 0x%x vma %p\n", + size, (unsigned int)p_mem_area->dma_handle, + p_mem_area->vaddr); + p_mem_area->pdev = &pdev->dev; + p_mem_area->size = size; + return 0; + } else { + HPI_DEBUG_LOG(WARNING, + "failed to allocate %d bytes locked memory\n", size); + p_mem_area->size = 0; + return 1; + } +} + +u16 hpios_locked_mem_free(struct consistent_dma_area *p_mem_area) +{ + if (p_mem_area->size) { + dma_free_coherent(p_mem_area->pdev, p_mem_area->size, + p_mem_area->vaddr, p_mem_area->dma_handle); + HPI_DEBUG_LOG(DEBUG, "freed %lu bytes, dma 0x%x vma %p\n", + (unsigned long)p_mem_area->size, + (unsigned int)p_mem_area->dma_handle, + p_mem_area->vaddr); + p_mem_area->size = 0; + return 0; + } else { + return 1; + } +} |