ALSA: Add support of AudioScience ASI boards

Added the support of AudioScience ASI boards.
The driver has been tested for years on alsa-driver external tree,
now finally got merged to the kernel.

Signed-off-by: Eliot Blennerhassett <eblennerhassett@audioscience.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 178 insertions, 0 deletions

diff --git a/sound/pci/asihpi/hpios.h b/sound/pci/asihpi/hpios.h
new file mode 100644
index 000000000000..a62c3f1e5f09
--- /dev/null
+++ b/sound/pci/asihpi/hpios.h
@@ -0,0 +1,178 @@
+/******************************************************************************
+
+    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 Specific macros for Linux Kernel driver
+
+(C) Copyright AudioScience Inc. 1997-2003
+******************************************************************************/
+#ifndef _HPIOS_H_
+#define _HPIOS_H_
+
+#undef HPI_OS_LINUX_KERNEL
+#define HPI_OS_LINUX_KERNEL
+
+#define HPI_OS_DEFINED
+#define HPI_KERNEL_MODE
+
+#define HPI_REASSIGN_DUPLICATE_ADAPTER_IDX
+
+#include <linux/io.h>
+#include <asm/system.h>
+#include <linux/ioctl.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/device.h>
+#include <linux/firmware.h>
+#include <linux/interrupt.h>
+#include <linux/pci.h>
+
+#define HPI_NO_OS_FILE_OPS
+
+#ifdef CONFIG_64BIT
+#define HPI64BIT
+#endif
+
+/** Details of a memory area allocated with  pci_alloc_consistent
+Need all info for parameters to pci_free_consistent
+*/
+struct consistent_dma_area {
+        struct device *pdev;
+        /* looks like dma-mapping dma_devres ?! */
+        size_t size;
+        void *vaddr;
+        dma_addr_t dma_handle;
+};
+
+static inline u16 hpios_locked_mem_get_phys_addr(struct consistent_dma_area
+        *locked_mem_handle, u32 *p_physical_addr)
+{
+        *p_physical_addr = locked_mem_handle->dma_handle;
+        return 0;
+}
+
+static inline u16 hpios_locked_mem_get_virt_addr(struct consistent_dma_area
+        *locked_mem_handle, void **pp_virtual_addr)
+{
+        *pp_virtual_addr = locked_mem_handle->vaddr;
+        return 0;
+}
+
+static inline u16 hpios_locked_mem_valid(struct consistent_dma_area
+        *locked_mem_handle)
+{
+        return locked_mem_handle->size != 0;
+}
+
+struct hpi_ioctl_linux {
+        void __user *phm;
+        void __user *phr;
+};
+
+/* Conflict?: H is already used by a number of drivers hid, bluetooth hci,
+   and some sound drivers sb16, hdsp, emu10k. AFAIK 0xFC is ununsed command
+*/
+#define HPI_IOCTL_LINUX _IOWR('H', 0xFC, struct hpi_ioctl_linux)
+
+#define HPI_DEBUG_FLAG_ERROR   KERN_ERR
+#define HPI_DEBUG_FLAG_WARNING KERN_WARNING
+#define HPI_DEBUG_FLAG_NOTICE  KERN_NOTICE
+#define HPI_DEBUG_FLAG_INFO    KERN_INFO
+#define HPI_DEBUG_FLAG_DEBUG   KERN_DEBUG
+#define HPI_DEBUG_FLAG_VERBOSE KERN_DEBUG       /* kernel has no verbose */
+
+#include <linux/spinlock.h>
+
+#define HPI_LOCKING
+
+struct hpios_spinlock {
+        spinlock_t lock;        /* SEE hpios_spinlock */
+        int lock_context;
+};
+
+/* The reason for all this evilness is that ALSA calls some of a drivers
+ * operators in atomic context, and some not.  But all our functions channel
+ * through the HPI_Message conduit, so we can't handle the different context
+ * per function
+ */
+#define IN_LOCK_BH 1
+#define IN_LOCK_IRQ 0
+static inline void cond_lock(struct hpios_spinlock *l)
+{
+        if (irqs_disabled()) {
+                /* NO bh or isr can execute on this processor,
+                   so ordinary lock will do
+                 */
+                spin_lock(&((l)->lock));
+                l->lock_context = IN_LOCK_IRQ;
+        } else {
+                spin_lock_bh(&((l)->lock));
+                l->lock_context = IN_LOCK_BH;
+        }
+}
+
+static inline void cond_unlock(struct hpios_spinlock *l)
+{
+        if (l->lock_context == IN_LOCK_BH)
+                spin_unlock_bh(&((l)->lock));
+        else
+                spin_unlock(&((l)->lock));
+}
+
+#define hpios_msgxlock_init(obj)      spin_lock_init(&(obj)->lock)
+#define hpios_msgxlock_lock(obj)   cond_lock(obj)
+#define hpios_msgxlock_un_lock(obj) cond_unlock(obj)
+
+#define hpios_dsplock_init(obj)       spin_lock_init(&(obj)->dsp_lock.lock)
+#define hpios_dsplock_lock(obj)    cond_lock(&(obj)->dsp_lock)
+#define hpios_dsplock_unlock(obj)  cond_unlock(&(obj)->dsp_lock)
+
+#ifdef CONFIG_SND_DEBUG
+#define HPI_DEBUG
+#endif
+
+#define HPI_ALIST_LOCKING
+#define hpios_alistlock_init(obj)    spin_lock_init(&((obj)->list_lock.lock))
+#define hpios_alistlock_lock(obj) spin_lock(&((obj)->list_lock.lock))
+#define hpios_alistlock_un_lock(obj) spin_unlock(&((obj)->list_lock.lock))
+
+struct hpi_adapter {
+        /* mutex prevents contention for one card
+           between multiple user programs (via ioctl) */
+        struct mutex mutex;
+        u16 index;
+        u16 type;
+
+        /* ALSA card structure */
+        void *snd_card_asihpi;
+
+        char *p_buffer;
+        size_t buffer_size;
+        struct pci_dev *pci;
+        void __iomem *ap_remapped_mem_base[HPI_MAX_ADAPTER_MEM_SPACES];
+};
+
+static inline void hpios_unmap_io(void __iomem *addr,
+        unsigned long size)
+{
+        iounmap(addr);
+}
+
+void __iomem *hpios_map_io(struct pci_dev *pci_dev, int idx,
+        unsigned int length);
+
+#endif