aboutsummaryrefslogtreecommitdiffstats
path: root/sound/oss/btaudio.c
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /sound/oss/btaudio.c
downloadlinux-dev-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.xz
linux-dev-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.zip
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'sound/oss/btaudio.c')
-rw-r--r--sound/oss/btaudio.c1136
1 files changed, 1136 insertions, 0 deletions
diff --git a/sound/oss/btaudio.c b/sound/oss/btaudio.c
new file mode 100644
index 000000000000..a85093fec7be
--- /dev/null
+++ b/sound/oss/btaudio.c
@@ -0,0 +1,1136 @@
+/*
+ btaudio - bt878 audio dma driver for linux 2.4.x
+
+ (c) 2000-2002 Gerd Knorr <kraxel@bytesex.org>
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+
+#include <linux/module.h>
+#include <linux/errno.h>
+#include <linux/pci.h>
+#include <linux/sched.h>
+#include <linux/signal.h>
+#include <linux/types.h>
+#include <linux/interrupt.h>
+#include <linux/init.h>
+#include <linux/poll.h>
+#include <linux/sound.h>
+#include <linux/soundcard.h>
+#include <linux/slab.h>
+#include <linux/kdev_t.h>
+#include <asm/uaccess.h>
+#include <asm/io.h>
+
+
+/* mmio access */
+#define btwrite(dat,adr) writel((dat), (bta->mmio+(adr)))
+#define btread(adr) readl(bta->mmio+(adr))
+
+#define btand(dat,adr) btwrite((dat) & btread(adr), adr)
+#define btor(dat,adr) btwrite((dat) | btread(adr), adr)
+#define btaor(dat,mask,adr) btwrite((dat) | ((mask) & btread(adr)), adr)
+
+/* registers (shifted because bta->mmio is long) */
+#define REG_INT_STAT (0x100 >> 2)
+#define REG_INT_MASK (0x104 >> 2)
+#define REG_GPIO_DMA_CTL (0x10c >> 2)
+#define REG_PACKET_LEN (0x110 >> 2)
+#define REG_RISC_STRT_ADD (0x114 >> 2)
+#define REG_RISC_COUNT (0x120 >> 2)
+
+/* IRQ bits - REG_INT_(STAT|MASK) */
+#define IRQ_SCERR (1 << 19)
+#define IRQ_OCERR (1 << 18)
+#define IRQ_PABORT (1 << 17)
+#define IRQ_RIPERR (1 << 16)
+#define IRQ_PPERR (1 << 15)
+#define IRQ_FDSR (1 << 14)
+#define IRQ_FTRGT (1 << 13)
+#define IRQ_FBUS (1 << 12)
+#define IRQ_RISCI (1 << 11)
+#define IRQ_OFLOW (1 << 3)
+
+#define IRQ_BTAUDIO (IRQ_SCERR | IRQ_OCERR | IRQ_PABORT | IRQ_RIPERR |\
+ IRQ_PPERR | IRQ_FDSR | IRQ_FTRGT | IRQ_FBUS |\
+ IRQ_RISCI)
+
+/* REG_GPIO_DMA_CTL bits */
+#define DMA_CTL_A_PWRDN (1 << 26)
+#define DMA_CTL_DA_SBR (1 << 14)
+#define DMA_CTL_DA_ES2 (1 << 13)
+#define DMA_CTL_ACAP_EN (1 << 4)
+#define DMA_CTL_RISC_EN (1 << 1)
+#define DMA_CTL_FIFO_EN (1 << 0)
+
+/* RISC instructions */
+#define RISC_WRITE (0x01 << 28)
+#define RISC_JUMP (0x07 << 28)
+#define RISC_SYNC (0x08 << 28)
+
+/* RISC bits */
+#define RISC_WR_SOL (1 << 27)
+#define RISC_WR_EOL (1 << 26)
+#define RISC_IRQ (1 << 24)
+#define RISC_SYNC_RESYNC (1 << 15)
+#define RISC_SYNC_FM1 0x06
+#define RISC_SYNC_VRO 0x0c
+
+#define HWBASE_AD (448000)
+
+/* -------------------------------------------------------------- */
+
+struct btaudio {
+ /* linked list */
+ struct btaudio *next;
+
+ /* device info */
+ int dsp_digital;
+ int dsp_analog;
+ int mixer_dev;
+ struct pci_dev *pci;
+ unsigned int irq;
+ unsigned long mem;
+ unsigned long __iomem *mmio;
+
+ /* locking */
+ int users;
+ struct semaphore lock;
+
+ /* risc instructions */
+ unsigned int risc_size;
+ unsigned long *risc_cpu;
+ dma_addr_t risc_dma;
+
+ /* audio data */
+ unsigned int buf_size;
+ unsigned char *buf_cpu;
+ dma_addr_t buf_dma;
+
+ /* buffer setup */
+ int line_bytes;
+ int line_count;
+ int block_bytes;
+ int block_count;
+
+ /* read fifo management */
+ int recording;
+ int dma_block;
+ int read_offset;
+ int read_count;
+ wait_queue_head_t readq;
+
+ /* settings */
+ int gain[3];
+ int source;
+ int bits;
+ int decimation;
+ int mixcount;
+ int sampleshift;
+ int channels;
+ int analog;
+ int rate;
+};
+
+struct cardinfo {
+ char *name;
+ int rate;
+};
+
+static struct btaudio *btaudios;
+static unsigned int debug;
+static unsigned int irq_debug;
+
+/* -------------------------------------------------------------- */
+
+#define BUF_DEFAULT 128*1024
+#define BUF_MIN 8192
+
+static int alloc_buffer(struct btaudio *bta)
+{
+ if (NULL == bta->buf_cpu) {
+ for (bta->buf_size = BUF_DEFAULT; bta->buf_size >= BUF_MIN;
+ bta->buf_size = bta->buf_size >> 1) {
+ bta->buf_cpu = pci_alloc_consistent
+ (bta->pci, bta->buf_size, &bta->buf_dma);
+ if (NULL != bta->buf_cpu)
+ break;
+ }
+ if (NULL == bta->buf_cpu)
+ return -ENOMEM;
+ memset(bta->buf_cpu,0,bta->buf_size);
+ }
+ if (NULL == bta->risc_cpu) {
+ bta->risc_size = PAGE_SIZE;
+ bta->risc_cpu = pci_alloc_consistent
+ (bta->pci, bta->risc_size, &bta->risc_dma);
+ if (NULL == bta->risc_cpu) {
+ pci_free_consistent(bta->pci, bta->buf_size, bta->buf_cpu, bta->buf_dma);
+ bta->buf_cpu = NULL;
+ return -ENOMEM;
+ }
+ }
+ return 0;
+}
+
+static void free_buffer(struct btaudio *bta)
+{
+ if (NULL != bta->buf_cpu) {
+ pci_free_consistent(bta->pci, bta->buf_size,
+ bta->buf_cpu, bta->buf_dma);
+ bta->buf_cpu = NULL;
+ }
+ if (NULL != bta->risc_cpu) {
+ pci_free_consistent(bta->pci, bta->risc_size,
+ bta->risc_cpu, bta->risc_dma);
+ bta->risc_cpu = NULL;
+ }
+}
+
+static int make_risc(struct btaudio *bta)
+{
+ int rp, bp, line, block;
+ unsigned long risc;
+
+ bta->block_bytes = bta->buf_size >> 4;
+ bta->block_count = 1 << 4;
+ bta->line_bytes = bta->block_bytes;
+ bta->line_count = bta->block_count;
+ while (bta->line_bytes > 4095) {
+ bta->line_bytes >>= 1;
+ bta->line_count <<= 1;
+ }
+ if (bta->line_count > 255)
+ return -EINVAL;
+ if (debug)
+ printk(KERN_DEBUG
+ "btaudio: bufsize=%d - bs=%d bc=%d - ls=%d, lc=%d\n",
+ bta->buf_size,bta->block_bytes,bta->block_count,
+ bta->line_bytes,bta->line_count);
+ rp = 0; bp = 0;
+ block = 0;
+ bta->risc_cpu[rp++] = cpu_to_le32(RISC_SYNC|RISC_SYNC_FM1);
+ bta->risc_cpu[rp++] = cpu_to_le32(0);
+ for (line = 0; line < bta->line_count; line++) {
+ risc = RISC_WRITE | RISC_WR_SOL | RISC_WR_EOL;
+ risc |= bta->line_bytes;
+ if (0 == (bp & (bta->block_bytes-1))) {
+ risc |= RISC_IRQ;
+ risc |= (block & 0x0f) << 16;
+ risc |= (~block & 0x0f) << 20;
+ block++;
+ }
+ bta->risc_cpu[rp++] = cpu_to_le32(risc);
+ bta->risc_cpu[rp++] = cpu_to_le32(bta->buf_dma + bp);
+ bp += bta->line_bytes;
+ }
+ bta->risc_cpu[rp++] = cpu_to_le32(RISC_SYNC|RISC_SYNC_VRO);
+ bta->risc_cpu[rp++] = cpu_to_le32(0);
+ bta->risc_cpu[rp++] = cpu_to_le32(RISC_JUMP);
+ bta->risc_cpu[rp++] = cpu_to_le32(bta->risc_dma);
+ return 0;
+}
+
+static int start_recording(struct btaudio *bta)
+{
+ int ret;
+
+ if (0 != (ret = alloc_buffer(bta)))
+ return ret;
+ if (0 != (ret = make_risc(bta)))
+ return ret;
+
+ btwrite(bta->risc_dma, REG_RISC_STRT_ADD);
+ btwrite((bta->line_count << 16) | bta->line_bytes,
+ REG_PACKET_LEN);
+ btwrite(IRQ_BTAUDIO, REG_INT_MASK);
+ if (bta->analog) {
+ btwrite(DMA_CTL_ACAP_EN |
+ DMA_CTL_RISC_EN |
+ DMA_CTL_FIFO_EN |
+ DMA_CTL_DA_ES2 |
+ ((bta->bits == 8) ? DMA_CTL_DA_SBR : 0) |
+ (bta->gain[bta->source] << 28) |
+ (bta->source << 24) |
+ (bta->decimation << 8),
+ REG_GPIO_DMA_CTL);
+ } else {
+ btwrite(DMA_CTL_ACAP_EN |
+ DMA_CTL_RISC_EN |
+ DMA_CTL_FIFO_EN |
+ DMA_CTL_DA_ES2 |
+ DMA_CTL_A_PWRDN |
+ (1 << 6) |
+ ((bta->bits == 8) ? DMA_CTL_DA_SBR : 0) |
+ (bta->gain[bta->source] << 28) |
+ (bta->source << 24) |
+ (bta->decimation << 8),
+ REG_GPIO_DMA_CTL);
+ }
+ bta->dma_block = 0;
+ bta->read_offset = 0;
+ bta->read_count = 0;
+ bta->recording = 1;
+ if (debug)
+ printk(KERN_DEBUG "btaudio: recording started\n");
+ return 0;
+}
+
+static void stop_recording(struct btaudio *bta)
+{
+ btand(~15, REG_GPIO_DMA_CTL);
+ bta->recording = 0;
+ if (debug)
+ printk(KERN_DEBUG "btaudio: recording stopped\n");
+}
+
+
+/* -------------------------------------------------------------- */
+
+static int btaudio_mixer_open(struct inode *inode, struct file *file)
+{
+ int minor = iminor(inode);
+ struct btaudio *bta;
+
+ for (bta = btaudios; bta != NULL; bta = bta->next)
+ if (bta->mixer_dev == minor)
+ break;
+ if (NULL == bta)
+ return -ENODEV;
+
+ if (debug)
+ printk("btaudio: open mixer [%d]\n",minor);
+ file->private_data = bta;
+ return 0;
+}
+
+static int btaudio_mixer_release(struct inode *inode, struct file *file)
+{
+ return 0;
+}
+
+static int btaudio_mixer_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ struct btaudio *bta = file->private_data;
+ int ret,val=0,i=0;
+ void __user *argp = (void __user *)arg;
+
+ if (cmd == SOUND_MIXER_INFO) {
+ mixer_info info;
+ memset(&info,0,sizeof(info));
+ strlcpy(info.id,"bt878",sizeof(info.id));
+ strlcpy(info.name,"Brooktree Bt878 audio",sizeof(info.name));
+ info.modify_counter = bta->mixcount;
+ if (copy_to_user(argp, &info, sizeof(info)))
+ return -EFAULT;
+ return 0;
+ }
+ if (cmd == SOUND_OLD_MIXER_INFO) {
+ _old_mixer_info info;
+ memset(&info,0,sizeof(info));
+ strlcpy(info.id,"bt878",sizeof(info.id)-1);
+ strlcpy(info.name,"Brooktree Bt878 audio",sizeof(info.name));
+ if (copy_to_user(argp, &info, sizeof(info)))
+ return -EFAULT;
+ return 0;
+ }
+ if (cmd == OSS_GETVERSION)
+ return put_user(SOUND_VERSION, (int __user *)argp);
+
+ /* read */
+ if (_SIOC_DIR(cmd) & _SIOC_WRITE)
+ if (get_user(val, (int __user *)argp))
+ return -EFAULT;
+
+ switch (cmd) {
+ case MIXER_READ(SOUND_MIXER_CAPS):
+ ret = SOUND_CAP_EXCL_INPUT;
+ break;
+ case MIXER_READ(SOUND_MIXER_STEREODEVS):
+ ret = 0;
+ break;
+ case MIXER_READ(SOUND_MIXER_RECMASK):
+ case MIXER_READ(SOUND_MIXER_DEVMASK):
+ ret = SOUND_MASK_LINE1|SOUND_MASK_LINE2|SOUND_MASK_LINE3;
+ break;
+
+ case MIXER_WRITE(SOUND_MIXER_RECSRC):
+ if (val & SOUND_MASK_LINE1 && bta->source != 0)
+ bta->source = 0;
+ else if (val & SOUND_MASK_LINE2 && bta->source != 1)
+ bta->source = 1;
+ else if (val & SOUND_MASK_LINE3 && bta->source != 2)
+ bta->source = 2;
+ btaor((bta->gain[bta->source] << 28) |
+ (bta->source << 24),
+ 0x0cffffff, REG_GPIO_DMA_CTL);
+ case MIXER_READ(SOUND_MIXER_RECSRC):
+ switch (bta->source) {
+ case 0: ret = SOUND_MASK_LINE1; break;
+ case 1: ret = SOUND_MASK_LINE2; break;
+ case 2: ret = SOUND_MASK_LINE3; break;
+ default: ret = 0;
+ }
+ break;
+
+ case MIXER_WRITE(SOUND_MIXER_LINE1):
+ case MIXER_WRITE(SOUND_MIXER_LINE2):
+ case MIXER_WRITE(SOUND_MIXER_LINE3):
+ if (MIXER_WRITE(SOUND_MIXER_LINE1) == cmd)
+ i = 0;
+ if (MIXER_WRITE(SOUND_MIXER_LINE2) == cmd)
+ i = 1;
+ if (MIXER_WRITE(SOUND_MIXER_LINE3) == cmd)
+ i = 2;
+ bta->gain[i] = (val & 0xff) * 15 / 100;
+ if (bta->gain[i] > 15) bta->gain[i] = 15;
+ if (bta->gain[i] < 0) bta->gain[i] = 0;
+ if (i == bta->source)
+ btaor((bta->gain[bta->source]<<28),
+ 0x0fffffff, REG_GPIO_DMA_CTL);
+ ret = bta->gain[i] * 100 / 15;
+ ret |= ret << 8;
+ break;
+
+ case MIXER_READ(SOUND_MIXER_LINE1):
+ case MIXER_READ(SOUND_MIXER_LINE2):
+ case MIXER_READ(SOUND_MIXER_LINE3):
+ if (MIXER_READ(SOUND_MIXER_LINE1) == cmd)
+ i = 0;
+ if (MIXER_READ(SOUND_MIXER_LINE2) == cmd)
+ i = 1;
+ if (MIXER_READ(SOUND_MIXER_LINE3) == cmd)
+ i = 2;
+ ret = bta->gain[i] * 100 / 15;
+ ret |= ret << 8;
+ break;
+
+ default:
+ return -EINVAL;
+ }
+ if (put_user(ret, (int __user *)argp))
+ return -EFAULT;
+ return 0;
+}
+
+static struct file_operations btaudio_mixer_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .open = btaudio_mixer_open,
+ .release = btaudio_mixer_release,
+ .ioctl = btaudio_mixer_ioctl,
+};
+
+/* -------------------------------------------------------------- */
+
+static int btaudio_dsp_open(struct inode *inode, struct file *file,
+ struct btaudio *bta, int analog)
+{
+ down(&bta->lock);
+ if (bta->users)
+ goto busy;
+ bta->users++;
+ file->private_data = bta;
+
+ bta->analog = analog;
+ bta->dma_block = 0;
+ bta->read_offset = 0;
+ bta->read_count = 0;
+ bta->sampleshift = 0;
+
+ up(&bta->lock);
+ return 0;
+
+ busy:
+ up(&bta->lock);
+ return -EBUSY;
+}
+
+static int btaudio_dsp_open_digital(struct inode *inode, struct file *file)
+{
+ int minor = iminor(inode);
+ struct btaudio *bta;
+
+ for (bta = btaudios; bta != NULL; bta = bta->next)
+ if (bta->dsp_digital == minor)
+ break;
+ if (NULL == bta)
+ return -ENODEV;
+
+ if (debug)
+ printk("btaudio: open digital dsp [%d]\n",minor);
+ return btaudio_dsp_open(inode,file,bta,0);
+}
+
+static int btaudio_dsp_open_analog(struct inode *inode, struct file *file)
+{
+ int minor = iminor(inode);
+ struct btaudio *bta;
+
+ for (bta = btaudios; bta != NULL; bta = bta->next)
+ if (bta->dsp_analog == minor)
+ break;
+ if (NULL == bta)
+ return -ENODEV;
+
+ if (debug)
+ printk("btaudio: open analog dsp [%d]\n",minor);
+ return btaudio_dsp_open(inode,file,bta,1);
+}
+
+static int btaudio_dsp_release(struct inode *inode, struct file *file)
+{
+ struct btaudio *bta = file->private_data;
+
+ down(&bta->lock);
+ if (bta->recording)
+ stop_recording(bta);
+ bta->users--;
+ up(&bta->lock);
+ return 0;
+}
+
+static ssize_t btaudio_dsp_read(struct file *file, char __user *buffer,
+ size_t swcount, loff_t *ppos)
+{
+ struct btaudio *bta = file->private_data;
+ int hwcount = swcount << bta->sampleshift;
+ int nsrc, ndst, err, ret = 0;
+ DECLARE_WAITQUEUE(wait, current);
+
+ add_wait_queue(&bta->readq, &wait);
+ down(&bta->lock);
+ while (swcount > 0) {
+ if (0 == bta->read_count) {
+ if (!bta->recording) {
+ if (0 != (err = start_recording(bta))) {
+ if (0 == ret)
+ ret = err;
+ break;
+ }
+ }
+ if (file->f_flags & O_NONBLOCK) {
+ if (0 == ret)
+ ret = -EAGAIN;
+ break;
+ }
+ up(&bta->lock);
+ current->state = TASK_INTERRUPTIBLE;
+ schedule();
+ down(&bta->lock);
+ if(signal_pending(current)) {
+ if (0 == ret)
+ ret = -EINTR;
+ break;
+ }
+ }
+ nsrc = (bta->read_count < hwcount) ? bta->read_count : hwcount;
+ if (nsrc > bta->buf_size - bta->read_offset)
+ nsrc = bta->buf_size - bta->read_offset;
+ ndst = nsrc >> bta->sampleshift;
+
+ if ((bta->analog && 0 == bta->sampleshift) ||
+ (!bta->analog && 2 == bta->channels)) {
+ /* just copy */
+ if (copy_to_user(buffer + ret, bta->buf_cpu + bta->read_offset, nsrc)) {
+ if (0 == ret)
+ ret = -EFAULT;
+ break;
+ }
+
+ } else if (!bta->analog) {
+ /* stereo => mono (digital audio) */
+ __s16 *src = (__s16*)(bta->buf_cpu + bta->read_offset);
+ __s16 __user *dst = (__s16 __user *)(buffer + ret);
+ __s16 avg;
+ int n = ndst>>1;
+ if (!access_ok(VERIFY_WRITE, dst, ndst)) {
+ if (0 == ret)
+ ret = -EFAULT;
+ break;
+ }
+ for (; n; n--, dst++) {
+ avg = (__s16)le16_to_cpu(*src) / 2; src++;
+ avg += (__s16)le16_to_cpu(*src) / 2; src++;
+ __put_user(cpu_to_le16(avg),dst);
+ }
+
+ } else if (8 == bta->bits) {
+ /* copy + byte downsampling (audio A/D) */
+ __u8 *src = bta->buf_cpu + bta->read_offset;
+ __u8 __user *dst = buffer + ret;
+ int n = ndst;
+ if (!access_ok(VERIFY_WRITE, dst, ndst)) {
+ if (0 == ret)
+ ret = -EFAULT;
+ break;
+ }
+ for (; n; n--, src += (1 << bta->sampleshift), dst++)
+ __put_user(*src, dst);
+
+ } else {
+ /* copy + word downsampling (audio A/D) */
+ __u16 *src = (__u16*)(bta->buf_cpu + bta->read_offset);
+ __u16 __user *dst = (__u16 __user *)(buffer + ret);
+ int n = ndst>>1;
+ if (!access_ok(VERIFY_WRITE,dst,ndst)) {
+ if (0 == ret)
+ ret = -EFAULT;
+ break;
+ }
+ for (; n; n--, src += (1 << bta->sampleshift), dst++)
+ __put_user(*src, dst);
+ }
+
+ ret += ndst;
+ swcount -= ndst;
+ hwcount -= nsrc;
+ bta->read_count -= nsrc;
+ bta->read_offset += nsrc;
+ if (bta->read_offset == bta->buf_size)
+ bta->read_offset = 0;
+ }
+ up(&bta->lock);
+ remove_wait_queue(&bta->readq, &wait);
+ current->state = TASK_RUNNING;
+ return ret;
+}
+
+static ssize_t btaudio_dsp_write(struct file *file, const char __user *buffer,
+ size_t count, loff_t *ppos)
+{
+ return -EINVAL;
+}
+
+static int btaudio_dsp_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ struct btaudio *bta = file->private_data;
+ int s, i, ret, val = 0;
+ void __user *argp = (void __user *)arg;
+ int __user *p = argp;
+
+ switch (cmd) {
+ case OSS_GETVERSION:
+ return put_user(SOUND_VERSION, p);
+ case SNDCTL_DSP_GETCAPS:
+ return 0;
+
+ case SNDCTL_DSP_SPEED:
+ if (get_user(val, p))
+ return -EFAULT;
+ if (bta->analog) {
+ for (s = 0; s < 16; s++)
+ if (val << s >= HWBASE_AD*4/15)
+ break;
+ for (i = 15; i >= 5; i--)
+ if (val << s <= HWBASE_AD*4/i)
+ break;
+ bta->sampleshift = s;
+ bta->decimation = i;
+ if (debug)
+ printk(KERN_DEBUG "btaudio: rate: req=%d "
+ "dec=%d shift=%d hwrate=%d swrate=%d\n",
+ val,i,s,(HWBASE_AD*4/i),(HWBASE_AD*4/i)>>s);
+ } else {
+ bta->sampleshift = (bta->channels == 2) ? 0 : 1;
+ bta->decimation = 0;
+ }
+ if (bta->recording) {
+ down(&bta->lock);
+ stop_recording(bta);
+ start_recording(bta);
+ up(&bta->lock);
+ }
+ /* fall through */
+ case SOUND_PCM_READ_RATE:
+ if (bta->analog) {
+ return put_user(HWBASE_AD*4/bta->decimation>>bta->sampleshift, p);
+ } else {
+ return put_user(bta->rate, p);
+ }
+
+ case SNDCTL_DSP_STEREO:
+ if (!bta->analog) {
+ if (get_user(val, p))
+ return -EFAULT;
+ bta->channels = (val > 0) ? 2 : 1;
+ bta->sampleshift = (bta->channels == 2) ? 0 : 1;
+ if (debug)
+ printk(KERN_INFO
+ "btaudio: stereo=%d channels=%d\n",
+ val,bta->channels);
+ } else {
+ if (val == 1)
+ return -EFAULT;
+ else {
+ bta->channels = 1;
+ if (debug)
+ printk(KERN_INFO
+ "btaudio: stereo=0 channels=1\n");
+ }
+ }
+ return put_user((bta->channels)-1, p);
+
+ case SNDCTL_DSP_CHANNELS:
+ if (!bta->analog) {
+ if (get_user(val, p))
+ return -EFAULT;
+ bta->channels = (val > 1) ? 2 : 1;
+ bta->sampleshift = (bta->channels == 2) ? 0 : 1;
+ if (debug)
+ printk(KERN_DEBUG
+ "btaudio: val=%d channels=%d\n",
+ val,bta->channels);
+ }
+ /* fall through */
+ case SOUND_PCM_READ_CHANNELS:
+ return put_user(bta->channels, p);
+
+ case SNDCTL_DSP_GETFMTS: /* Returns a mask */
+ if (bta->analog)
+ return put_user(AFMT_S16_LE|AFMT_S8, p);
+ else
+ return put_user(AFMT_S16_LE, p);
+
+ case SNDCTL_DSP_SETFMT: /* Selects ONE fmt*/
+ if (get_user(val, p))
+ return -EFAULT;
+ if (val != AFMT_QUERY) {
+ if (bta->analog)
+ bta->bits = (val == AFMT_S8) ? 8 : 16;
+ else
+ bta->bits = 16;
+ if (bta->recording) {
+ down(&bta->lock);
+ stop_recording(bta);
+ start_recording(bta);
+ up(&bta->lock);
+ }
+ }
+ if (debug)
+ printk(KERN_DEBUG "btaudio: fmt: bits=%d\n",bta->bits);
+ return put_user((bta->bits==16) ? AFMT_S16_LE : AFMT_S8,
+ p);
+ break;
+ case SOUND_PCM_READ_BITS:
+ return put_user(bta->bits, p);
+
+ case SNDCTL_DSP_NONBLOCK:
+ file->f_flags |= O_NONBLOCK;
+ return 0;
+
+ case SNDCTL_DSP_RESET:
+ if (bta->recording) {
+ down(&bta->lock);
+ stop_recording(bta);
+ up(&bta->lock);
+ }
+ return 0;
+ case SNDCTL_DSP_GETBLKSIZE:
+ if (!bta->recording) {
+ if (0 != (ret = alloc_buffer(bta)))
+ return ret;
+ if (0 != (ret = make_risc(bta)))
+ return ret;
+ }
+ return put_user(bta->block_bytes>>bta->sampleshift,p);
+
+ case SNDCTL_DSP_SYNC:
+ /* NOP */
+ return 0;
+ case SNDCTL_DSP_GETISPACE:
+ {
+ audio_buf_info info;
+ if (!bta->recording)
+ return -EINVAL;
+ info.fragsize = bta->block_bytes>>bta->sampleshift;
+ info.fragstotal = bta->block_count;
+ info.bytes = bta->read_count;
+ info.fragments = info.bytes / info.fragsize;
+ if (debug)
+ printk(KERN_DEBUG "btaudio: SNDCTL_DSP_GETISPACE "
+ "returns %d/%d/%d/%d\n",
+ info.fragsize, info.fragstotal,
+ info.bytes, info.fragments);
+ if (copy_to_user(argp, &info, sizeof(info)))
+ return -EFAULT;
+ return 0;
+ }
+#if 0 /* TODO */
+ case SNDCTL_DSP_GETTRIGGER:
+ case SNDCTL_DSP_SETTRIGGER:
+ case SNDCTL_DSP_SETFRAGMENT:
+#endif
+ default:
+ return -EINVAL;
+ }
+}
+
+static unsigned int btaudio_dsp_poll(struct file *file, struct poll_table_struct *wait)
+{
+ struct btaudio *bta = file->private_data;
+ unsigned int mask = 0;
+
+ poll_wait(file, &bta->readq, wait);
+
+ if (0 != bta->read_count)
+ mask |= (POLLIN | POLLRDNORM);
+
+ return mask;
+}
+
+static struct file_operations btaudio_digital_dsp_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .open = btaudio_dsp_open_digital,
+ .release = btaudio_dsp_release,
+ .read = btaudio_dsp_read,
+ .write = btaudio_dsp_write,
+ .ioctl = btaudio_dsp_ioctl,
+ .poll = btaudio_dsp_poll,
+};
+
+static struct file_operations btaudio_analog_dsp_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .open = btaudio_dsp_open_analog,
+ .release = btaudio_dsp_release,
+ .read = btaudio_dsp_read,
+ .write = btaudio_dsp_write,
+ .ioctl = btaudio_dsp_ioctl,
+ .poll = btaudio_dsp_poll,
+};
+
+/* -------------------------------------------------------------- */
+
+static char *irq_name[] = { "", "", "", "OFLOW", "", "", "", "", "", "", "",
+ "RISCI", "FBUS", "FTRGT", "FDSR", "PPERR",
+ "RIPERR", "PABORT", "OCERR", "SCERR" };
+
+static irqreturn_t btaudio_irq(int irq, void *dev_id, struct pt_regs * regs)
+{
+ int count = 0;
+ u32 stat,astat;
+ struct btaudio *bta = dev_id;
+ int handled = 0;
+
+ for (;;) {
+ count++;
+ stat = btread(REG_INT_STAT);
+ astat = stat & btread(REG_INT_MASK);
+ if (!astat)
+ return IRQ_RETVAL(handled);
+ handled = 1;
+ btwrite(astat,REG_INT_STAT);
+
+ if (irq_debug) {
+ int i;
+ printk(KERN_DEBUG "btaudio: irq loop=%d risc=%x, bits:",
+ count, stat>>28);
+ for (i = 0; i < (sizeof(irq_name)/sizeof(char*)); i++) {
+ if (stat & (1 << i))
+ printk(" %s",irq_name[i]);
+ if (astat & (1 << i))
+ printk("*");
+ }
+ printk("\n");
+ }
+ if (stat & IRQ_RISCI) {
+ int blocks;
+ blocks = (stat >> 28) - bta->dma_block;
+ if (blocks < 0)
+ blocks += bta->block_count;
+ bta->dma_block = stat >> 28;
+ if (bta->read_count + 2*bta->block_bytes > bta->buf_size) {
+ stop_recording(bta);
+ printk(KERN_INFO "btaudio: buffer overrun\n");
+ }
+ if (blocks > 0) {
+ bta->read_count += blocks * bta->block_bytes;
+ wake_up_interruptible(&bta->readq);
+ }
+ }
+ if (count > 10) {
+ printk(KERN_WARNING
+ "btaudio: Oops - irq mask cleared\n");
+ btwrite(0, REG_INT_MASK);
+ }
+ }
+ return IRQ_NONE;
+}
+
+/* -------------------------------------------------------------- */
+
+static unsigned int dsp1 = -1;
+static unsigned int dsp2 = -1;
+static unsigned int mixer = -1;
+static int latency = -1;
+static int digital = 1;
+static int analog = 1;
+static int rate;
+
+#define BTA_OSPREY200 1
+
+static struct cardinfo cards[] = {
+ [0] = {
+ .name = "default",
+ .rate = 32000,
+ },
+ [BTA_OSPREY200] = {
+ .name = "Osprey 200",
+ .rate = 44100,
+ },
+};
+
+static int __devinit btaudio_probe(struct pci_dev *pci_dev,
+ const struct pci_device_id *pci_id)
+{
+ struct btaudio *bta;
+ struct cardinfo *card = &cards[pci_id->driver_data];
+ unsigned char revision,lat;
+ int rc = -EBUSY;
+
+ if (pci_enable_device(pci_dev))
+ return -EIO;
+ if (!request_mem_region(pci_resource_start(pci_dev,0),
+ pci_resource_len(pci_dev,0),
+ "btaudio")) {
+ return -EBUSY;
+ }
+
+ bta = kmalloc(sizeof(*bta),GFP_ATOMIC);
+ if (!bta) {
+ rc = -ENOMEM;
+ goto fail0;
+ }
+ memset(bta,0,sizeof(*bta));
+
+ bta->pci = pci_dev;
+ bta->irq = pci_dev->irq;
+ bta->mem = pci_resource_start(pci_dev,0);
+ bta->mmio = ioremap(pci_resource_start(pci_dev,0),
+ pci_resource_len(pci_dev,0));
+
+ bta->source = 1;
+ bta->bits = 8;
+ bta->channels = 1;
+ if (bta->analog) {
+ bta->decimation = 15;
+ } else {
+ bta->decimation = 0;
+ bta->sampleshift = 1;
+ }
+
+ /* sample rate */
+ bta->rate = card->rate;
+ if (rate)
+ bta->rate = rate;
+
+ init_MUTEX(&bta->lock);
+ init_waitqueue_head(&bta->readq);
+
+ if (-1 != latency) {
+ printk(KERN_INFO "btaudio: setting pci latency timer to %d\n",
+ latency);
+ pci_write_config_byte(pci_dev, PCI_LATENCY_TIMER, latency);
+ }
+ pci_read_config_byte(pci_dev, PCI_CLASS_REVISION, &revision);
+ pci_read_config_byte(pci_dev, PCI_LATENCY_TIMER, &lat);
+ printk(KERN_INFO "btaudio: Bt%x (rev %d) at %02x:%02x.%x, ",
+ pci_dev->device,revision,pci_dev->bus->number,
+ PCI_SLOT(pci_dev->devfn),PCI_FUNC(pci_dev->devfn));
+ printk("irq: %d, latency: %d, mmio: 0x%lx\n",
+ bta->irq, lat, bta->mem);
+ printk("btaudio: using card config \"%s\"\n", card->name);
+
+ /* init hw */
+ btwrite(0, REG_GPIO_DMA_CTL);
+ btwrite(0, REG_INT_MASK);
+ btwrite(~0U, REG_INT_STAT);
+ pci_set_master(pci_dev);
+
+ if ((rc = request_irq(bta->irq, btaudio_irq, SA_SHIRQ|SA_INTERRUPT,
+ "btaudio",(void *)bta)) < 0) {
+ printk(KERN_WARNING
+ "btaudio: can't request irq (rc=%d)\n",rc);
+ goto fail1;
+ }
+
+ /* register devices */
+ if (digital) {
+ rc = bta->dsp_digital =
+ register_sound_dsp(&btaudio_digital_dsp_fops,dsp1);
+ if (rc < 0) {
+ printk(KERN_WARNING
+ "btaudio: can't register digital dsp (rc=%d)\n",rc);
+ goto fail2;
+ }
+ printk(KERN_INFO "btaudio: registered device dsp%d [digital]\n",
+ bta->dsp_digital >> 4);
+ }
+ if (analog) {
+ rc = bta->dsp_analog =
+ register_sound_dsp(&btaudio_analog_dsp_fops,dsp2);
+ if (rc < 0) {
+ printk(KERN_WARNING
+ "btaudio: can't register analog dsp (rc=%d)\n",rc);
+ goto fail3;
+ }
+ printk(KERN_INFO "btaudio: registered device dsp%d [analog]\n",
+ bta->dsp_analog >> 4);
+ rc = bta->mixer_dev = register_sound_mixer(&btaudio_mixer_fops,mixer);
+ if (rc < 0) {
+ printk(KERN_WARNING
+ "btaudio: can't register mixer (rc=%d)\n",rc);
+ goto fail4;
+ }
+ printk(KERN_INFO "btaudio: registered device mixer%d\n",
+ bta->mixer_dev >> 4);
+ }
+
+ /* hook into linked list */
+ bta->next = btaudios;
+ btaudios = bta;
+
+ pci_set_drvdata(pci_dev,bta);
+ return 0;
+
+ fail4:
+ unregister_sound_dsp(bta->dsp_analog);
+ fail3:
+ if (digital)
+ unregister_sound_dsp(bta->dsp_digital);
+ fail2:
+ free_irq(bta->irq,bta);
+ fail1:
+ kfree(bta);
+ fail0:
+ release_mem_region(pci_resource_start(pci_dev,0),
+ pci_resource_len(pci_dev,0));
+ return rc;
+}
+
+static void __devexit btaudio_remove(struct pci_dev *pci_dev)
+{
+ struct btaudio *bta = pci_get_drvdata(pci_dev);
+ struct btaudio *walk;
+
+ /* turn off all DMA / IRQs */
+ btand(~15, REG_GPIO_DMA_CTL);
+ btwrite(0, REG_INT_MASK);
+ btwrite(~0U, REG_INT_STAT);
+
+ /* unregister devices */
+ if (digital) {
+ unregister_sound_dsp(bta->dsp_digital);
+ }
+ if (analog) {
+ unregister_sound_dsp(bta->dsp_analog);
+ unregister_sound_mixer(bta->mixer_dev);
+ }
+
+ /* free resources */
+ free_buffer(bta);
+ free_irq(bta->irq,bta);
+ release_mem_region(pci_resource_start(pci_dev,0),
+ pci_resource_len(pci_dev,0));
+
+ /* remove from linked list */
+ if (bta == btaudios) {
+ btaudios = NULL;
+ } else {
+ for (walk = btaudios; walk->next != bta; walk = walk->next)
+ ; /* if (NULL == walk->next) BUG(); */
+ walk->next = bta->next;
+ }
+
+ pci_set_drvdata(pci_dev, NULL);
+ kfree(bta);
+ return;
+}
+
+/* -------------------------------------------------------------- */
+
+static struct pci_device_id btaudio_pci_tbl[] = {
+ {
+ .vendor = PCI_VENDOR_ID_BROOKTREE,
+ .device = 0x0878,
+ .subvendor = 0x0070,
+ .subdevice = 0xff01,
+ .driver_data = BTA_OSPREY200,
+ },{
+ .vendor = PCI_VENDOR_ID_BROOKTREE,
+ .device = 0x0878,
+ .subvendor = PCI_ANY_ID,
+ .subdevice = PCI_ANY_ID,
+ },{
+ .vendor = PCI_VENDOR_ID_BROOKTREE,
+ .device = 0x0878,
+ .subvendor = PCI_ANY_ID,
+ .subdevice = PCI_ANY_ID,
+ },{
+ /* --- end of list --- */
+ }
+};
+
+static struct pci_driver btaudio_pci_driver = {
+ .name = "btaudio",
+ .id_table = btaudio_pci_tbl,
+ .probe = btaudio_probe,
+ .remove = __devexit_p(btaudio_remove),
+};
+
+static int btaudio_init_module(void)
+{
+ printk(KERN_INFO "btaudio: driver version 0.7 loaded [%s%s%s]\n",
+ digital ? "digital" : "",
+ analog && digital ? "+" : "",
+ analog ? "analog" : "");
+ return pci_module_init(&btaudio_pci_driver);
+}
+
+static void btaudio_cleanup_module(void)
+{
+ pci_unregister_driver(&btaudio_pci_driver);
+ return;
+}
+
+module_init(btaudio_init_module);
+module_exit(btaudio_cleanup_module);
+
+module_param(dsp1, int, S_IRUGO);
+module_param(dsp2, int, S_IRUGO);
+module_param(mixer, int, S_IRUGO);
+module_param(debug, int, S_IRUGO | S_IWUSR);
+module_param(irq_debug, int, S_IRUGO | S_IWUSR);
+module_param(digital, int, S_IRUGO);
+module_param(analog, int, S_IRUGO);
+module_param(rate, int, S_IRUGO);
+module_param(latency, int, S_IRUGO);
+MODULE_PARM_DESC(latency,"pci latency timer");
+
+MODULE_DEVICE_TABLE(pci, btaudio_pci_tbl);
+MODULE_DESCRIPTION("bt878 audio dma driver");
+MODULE_AUTHOR("Gerd Knorr");
+MODULE_LICENSE("GPL");
+
+/*
+ * Local variables:
+ * c-basic-offset: 8
+ * End:
+ */