1 files changed, 114 insertions, 0 deletions

diff --git a/sound/pci/asihpi/hpios.c b/sound/pci/asihpi/hpios.c
new file mode 100644
index 000000000000..de615cfdb950
--- /dev/null
+++ b/sound/pci/asihpi/hpios.c
@@ -0,0 +1,114 @@
+/******************************************************************************
+
+    AudioScience HPI driver
+    Copyright (C) 1997-2010  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
+    published by the Free Software Foundation;
+
+    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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+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);
+
+}
+
+void hpios_locked_mem_init(void)
+{
+}
+
+/** Allocated an area of locked memory for bus master DMA operations.
+
+On error, return -ENOMEM, 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_DMA32 | 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 -ENOMEM;
+        }
+}
+
+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;
+        }
+}
+
+void hpios_locked_mem_free_all(void)
+{
+}
+
+void __iomem *hpios_map_io(struct pci_dev *pci_dev, int idx,
+        unsigned int length)
+{
+        HPI_DEBUG_LOG(DEBUG, "mapping %d %s %08llx-%08llx %04llx len 0x%x\n",
+                idx, pci_dev->resource[idx].name,
+                (unsigned long long)pci_resource_start(pci_dev, idx),
+                (unsigned long long)pci_resource_end(pci_dev, idx),
+                (unsigned long long)pci_resource_flags(pci_dev, idx), length);
+
+        if (!(pci_resource_flags(pci_dev, idx) & IORESOURCE_MEM)) {
+                HPI_DEBUG_LOG(ERROR, "not an io memory resource\n");
+                return NULL;
+        }
+
+        if (length > pci_resource_len(pci_dev, idx)) {
+                HPI_DEBUG_LOG(ERROR, "resource too small for requested %d \n",
+                        length);
+                return NULL;
+        }
+
+        return ioremap(pci_resource_start(pci_dev, idx), length);
+}