![Linus Torvalds](/assets/img/avatar_default.png)
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!
1137 lines
28 KiB
C
1137 lines
28 KiB
C
/*
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btaudio - bt878 audio dma driver for linux 2.4.x
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(c) 2000-2002 Gerd Knorr <kraxel@bytesex.org>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <linux/module.h>
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#include <linux/errno.h>
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#include <linux/pci.h>
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#include <linux/sched.h>
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#include <linux/signal.h>
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#include <linux/types.h>
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#include <linux/interrupt.h>
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#include <linux/init.h>
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#include <linux/poll.h>
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#include <linux/sound.h>
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#include <linux/soundcard.h>
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#include <linux/slab.h>
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#include <linux/kdev_t.h>
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#include <asm/uaccess.h>
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#include <asm/io.h>
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/* mmio access */
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#define btwrite(dat,adr) writel((dat), (bta->mmio+(adr)))
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#define btread(adr) readl(bta->mmio+(adr))
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#define btand(dat,adr) btwrite((dat) & btread(adr), adr)
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#define btor(dat,adr) btwrite((dat) | btread(adr), adr)
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#define btaor(dat,mask,adr) btwrite((dat) | ((mask) & btread(adr)), adr)
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/* registers (shifted because bta->mmio is long) */
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#define REG_INT_STAT (0x100 >> 2)
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#define REG_INT_MASK (0x104 >> 2)
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#define REG_GPIO_DMA_CTL (0x10c >> 2)
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#define REG_PACKET_LEN (0x110 >> 2)
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#define REG_RISC_STRT_ADD (0x114 >> 2)
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#define REG_RISC_COUNT (0x120 >> 2)
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/* IRQ bits - REG_INT_(STAT|MASK) */
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#define IRQ_SCERR (1 << 19)
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#define IRQ_OCERR (1 << 18)
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#define IRQ_PABORT (1 << 17)
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#define IRQ_RIPERR (1 << 16)
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#define IRQ_PPERR (1 << 15)
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#define IRQ_FDSR (1 << 14)
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#define IRQ_FTRGT (1 << 13)
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#define IRQ_FBUS (1 << 12)
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#define IRQ_RISCI (1 << 11)
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#define IRQ_OFLOW (1 << 3)
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#define IRQ_BTAUDIO (IRQ_SCERR | IRQ_OCERR | IRQ_PABORT | IRQ_RIPERR |\
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IRQ_PPERR | IRQ_FDSR | IRQ_FTRGT | IRQ_FBUS |\
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IRQ_RISCI)
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/* REG_GPIO_DMA_CTL bits */
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#define DMA_CTL_A_PWRDN (1 << 26)
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#define DMA_CTL_DA_SBR (1 << 14)
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#define DMA_CTL_DA_ES2 (1 << 13)
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#define DMA_CTL_ACAP_EN (1 << 4)
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#define DMA_CTL_RISC_EN (1 << 1)
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#define DMA_CTL_FIFO_EN (1 << 0)
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/* RISC instructions */
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#define RISC_WRITE (0x01 << 28)
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#define RISC_JUMP (0x07 << 28)
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#define RISC_SYNC (0x08 << 28)
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/* RISC bits */
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#define RISC_WR_SOL (1 << 27)
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#define RISC_WR_EOL (1 << 26)
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#define RISC_IRQ (1 << 24)
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#define RISC_SYNC_RESYNC (1 << 15)
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#define RISC_SYNC_FM1 0x06
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#define RISC_SYNC_VRO 0x0c
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#define HWBASE_AD (448000)
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/* -------------------------------------------------------------- */
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struct btaudio {
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/* linked list */
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struct btaudio *next;
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/* device info */
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int dsp_digital;
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int dsp_analog;
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int mixer_dev;
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struct pci_dev *pci;
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unsigned int irq;
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unsigned long mem;
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unsigned long __iomem *mmio;
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/* locking */
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int users;
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struct semaphore lock;
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/* risc instructions */
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unsigned int risc_size;
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unsigned long *risc_cpu;
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dma_addr_t risc_dma;
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/* audio data */
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unsigned int buf_size;
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unsigned char *buf_cpu;
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dma_addr_t buf_dma;
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/* buffer setup */
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int line_bytes;
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int line_count;
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int block_bytes;
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int block_count;
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/* read fifo management */
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int recording;
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int dma_block;
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int read_offset;
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int read_count;
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wait_queue_head_t readq;
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/* settings */
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int gain[3];
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int source;
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int bits;
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int decimation;
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int mixcount;
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int sampleshift;
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int channels;
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int analog;
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int rate;
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};
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struct cardinfo {
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char *name;
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int rate;
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};
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static struct btaudio *btaudios;
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static unsigned int debug;
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static unsigned int irq_debug;
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/* -------------------------------------------------------------- */
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#define BUF_DEFAULT 128*1024
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#define BUF_MIN 8192
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static int alloc_buffer(struct btaudio *bta)
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{
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if (NULL == bta->buf_cpu) {
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for (bta->buf_size = BUF_DEFAULT; bta->buf_size >= BUF_MIN;
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bta->buf_size = bta->buf_size >> 1) {
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bta->buf_cpu = pci_alloc_consistent
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(bta->pci, bta->buf_size, &bta->buf_dma);
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if (NULL != bta->buf_cpu)
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break;
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}
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if (NULL == bta->buf_cpu)
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return -ENOMEM;
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memset(bta->buf_cpu,0,bta->buf_size);
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}
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if (NULL == bta->risc_cpu) {
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bta->risc_size = PAGE_SIZE;
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bta->risc_cpu = pci_alloc_consistent
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(bta->pci, bta->risc_size, &bta->risc_dma);
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if (NULL == bta->risc_cpu) {
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pci_free_consistent(bta->pci, bta->buf_size, bta->buf_cpu, bta->buf_dma);
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bta->buf_cpu = NULL;
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return -ENOMEM;
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}
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}
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return 0;
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}
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static void free_buffer(struct btaudio *bta)
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{
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if (NULL != bta->buf_cpu) {
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pci_free_consistent(bta->pci, bta->buf_size,
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bta->buf_cpu, bta->buf_dma);
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bta->buf_cpu = NULL;
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}
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if (NULL != bta->risc_cpu) {
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pci_free_consistent(bta->pci, bta->risc_size,
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bta->risc_cpu, bta->risc_dma);
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bta->risc_cpu = NULL;
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}
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}
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static int make_risc(struct btaudio *bta)
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{
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int rp, bp, line, block;
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unsigned long risc;
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bta->block_bytes = bta->buf_size >> 4;
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bta->block_count = 1 << 4;
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bta->line_bytes = bta->block_bytes;
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bta->line_count = bta->block_count;
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while (bta->line_bytes > 4095) {
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bta->line_bytes >>= 1;
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bta->line_count <<= 1;
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}
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if (bta->line_count > 255)
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return -EINVAL;
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if (debug)
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printk(KERN_DEBUG
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"btaudio: bufsize=%d - bs=%d bc=%d - ls=%d, lc=%d\n",
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bta->buf_size,bta->block_bytes,bta->block_count,
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bta->line_bytes,bta->line_count);
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rp = 0; bp = 0;
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block = 0;
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bta->risc_cpu[rp++] = cpu_to_le32(RISC_SYNC|RISC_SYNC_FM1);
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bta->risc_cpu[rp++] = cpu_to_le32(0);
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for (line = 0; line < bta->line_count; line++) {
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risc = RISC_WRITE | RISC_WR_SOL | RISC_WR_EOL;
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risc |= bta->line_bytes;
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if (0 == (bp & (bta->block_bytes-1))) {
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risc |= RISC_IRQ;
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risc |= (block & 0x0f) << 16;
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risc |= (~block & 0x0f) << 20;
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block++;
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}
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bta->risc_cpu[rp++] = cpu_to_le32(risc);
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bta->risc_cpu[rp++] = cpu_to_le32(bta->buf_dma + bp);
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bp += bta->line_bytes;
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}
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bta->risc_cpu[rp++] = cpu_to_le32(RISC_SYNC|RISC_SYNC_VRO);
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bta->risc_cpu[rp++] = cpu_to_le32(0);
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bta->risc_cpu[rp++] = cpu_to_le32(RISC_JUMP);
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bta->risc_cpu[rp++] = cpu_to_le32(bta->risc_dma);
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return 0;
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}
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static int start_recording(struct btaudio *bta)
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{
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int ret;
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if (0 != (ret = alloc_buffer(bta)))
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return ret;
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if (0 != (ret = make_risc(bta)))
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return ret;
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btwrite(bta->risc_dma, REG_RISC_STRT_ADD);
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btwrite((bta->line_count << 16) | bta->line_bytes,
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REG_PACKET_LEN);
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btwrite(IRQ_BTAUDIO, REG_INT_MASK);
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if (bta->analog) {
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btwrite(DMA_CTL_ACAP_EN |
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DMA_CTL_RISC_EN |
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DMA_CTL_FIFO_EN |
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DMA_CTL_DA_ES2 |
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((bta->bits == 8) ? DMA_CTL_DA_SBR : 0) |
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(bta->gain[bta->source] << 28) |
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(bta->source << 24) |
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(bta->decimation << 8),
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REG_GPIO_DMA_CTL);
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} else {
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btwrite(DMA_CTL_ACAP_EN |
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DMA_CTL_RISC_EN |
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DMA_CTL_FIFO_EN |
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DMA_CTL_DA_ES2 |
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DMA_CTL_A_PWRDN |
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(1 << 6) |
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((bta->bits == 8) ? DMA_CTL_DA_SBR : 0) |
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(bta->gain[bta->source] << 28) |
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(bta->source << 24) |
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(bta->decimation << 8),
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REG_GPIO_DMA_CTL);
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}
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bta->dma_block = 0;
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bta->read_offset = 0;
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bta->read_count = 0;
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bta->recording = 1;
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if (debug)
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printk(KERN_DEBUG "btaudio: recording started\n");
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return 0;
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}
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static void stop_recording(struct btaudio *bta)
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{
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btand(~15, REG_GPIO_DMA_CTL);
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bta->recording = 0;
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if (debug)
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printk(KERN_DEBUG "btaudio: recording stopped\n");
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}
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/* -------------------------------------------------------------- */
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static int btaudio_mixer_open(struct inode *inode, struct file *file)
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{
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int minor = iminor(inode);
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struct btaudio *bta;
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for (bta = btaudios; bta != NULL; bta = bta->next)
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if (bta->mixer_dev == minor)
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break;
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if (NULL == bta)
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return -ENODEV;
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if (debug)
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printk("btaudio: open mixer [%d]\n",minor);
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file->private_data = bta;
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return 0;
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}
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static int btaudio_mixer_release(struct inode *inode, struct file *file)
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{
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return 0;
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}
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static int btaudio_mixer_ioctl(struct inode *inode, struct file *file,
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unsigned int cmd, unsigned long arg)
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{
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struct btaudio *bta = file->private_data;
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int ret,val=0,i=0;
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void __user *argp = (void __user *)arg;
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if (cmd == SOUND_MIXER_INFO) {
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mixer_info info;
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memset(&info,0,sizeof(info));
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strlcpy(info.id,"bt878",sizeof(info.id));
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strlcpy(info.name,"Brooktree Bt878 audio",sizeof(info.name));
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info.modify_counter = bta->mixcount;
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if (copy_to_user(argp, &info, sizeof(info)))
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return -EFAULT;
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return 0;
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}
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if (cmd == SOUND_OLD_MIXER_INFO) {
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_old_mixer_info info;
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memset(&info,0,sizeof(info));
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strlcpy(info.id,"bt878",sizeof(info.id)-1);
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strlcpy(info.name,"Brooktree Bt878 audio",sizeof(info.name));
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if (copy_to_user(argp, &info, sizeof(info)))
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return -EFAULT;
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return 0;
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}
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if (cmd == OSS_GETVERSION)
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return put_user(SOUND_VERSION, (int __user *)argp);
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/* read */
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if (_SIOC_DIR(cmd) & _SIOC_WRITE)
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if (get_user(val, (int __user *)argp))
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return -EFAULT;
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switch (cmd) {
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case MIXER_READ(SOUND_MIXER_CAPS):
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ret = SOUND_CAP_EXCL_INPUT;
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break;
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case MIXER_READ(SOUND_MIXER_STEREODEVS):
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ret = 0;
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break;
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case MIXER_READ(SOUND_MIXER_RECMASK):
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case MIXER_READ(SOUND_MIXER_DEVMASK):
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ret = SOUND_MASK_LINE1|SOUND_MASK_LINE2|SOUND_MASK_LINE3;
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break;
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case MIXER_WRITE(SOUND_MIXER_RECSRC):
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if (val & SOUND_MASK_LINE1 && bta->source != 0)
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bta->source = 0;
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else if (val & SOUND_MASK_LINE2 && bta->source != 1)
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bta->source = 1;
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else if (val & SOUND_MASK_LINE3 && bta->source != 2)
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bta->source = 2;
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btaor((bta->gain[bta->source] << 28) |
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(bta->source << 24),
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0x0cffffff, REG_GPIO_DMA_CTL);
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case MIXER_READ(SOUND_MIXER_RECSRC):
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switch (bta->source) {
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case 0: ret = SOUND_MASK_LINE1; break;
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case 1: ret = SOUND_MASK_LINE2; break;
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case 2: ret = SOUND_MASK_LINE3; break;
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default: ret = 0;
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}
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break;
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case MIXER_WRITE(SOUND_MIXER_LINE1):
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case MIXER_WRITE(SOUND_MIXER_LINE2):
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case MIXER_WRITE(SOUND_MIXER_LINE3):
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if (MIXER_WRITE(SOUND_MIXER_LINE1) == cmd)
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i = 0;
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if (MIXER_WRITE(SOUND_MIXER_LINE2) == cmd)
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i = 1;
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if (MIXER_WRITE(SOUND_MIXER_LINE3) == cmd)
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i = 2;
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bta->gain[i] = (val & 0xff) * 15 / 100;
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if (bta->gain[i] > 15) bta->gain[i] = 15;
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if (bta->gain[i] < 0) bta->gain[i] = 0;
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if (i == bta->source)
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btaor((bta->gain[bta->source]<<28),
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0x0fffffff, REG_GPIO_DMA_CTL);
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ret = bta->gain[i] * 100 / 15;
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ret |= ret << 8;
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break;
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case MIXER_READ(SOUND_MIXER_LINE1):
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case MIXER_READ(SOUND_MIXER_LINE2):
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case MIXER_READ(SOUND_MIXER_LINE3):
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if (MIXER_READ(SOUND_MIXER_LINE1) == cmd)
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i = 0;
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if (MIXER_READ(SOUND_MIXER_LINE2) == cmd)
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i = 1;
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if (MIXER_READ(SOUND_MIXER_LINE3) == cmd)
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i = 2;
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ret = bta->gain[i] * 100 / 15;
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ret |= ret << 8;
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break;
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default:
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return -EINVAL;
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}
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if (put_user(ret, (int __user *)argp))
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return -EFAULT;
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return 0;
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}
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static struct file_operations btaudio_mixer_fops = {
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.owner = THIS_MODULE,
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.llseek = no_llseek,
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.open = btaudio_mixer_open,
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.release = btaudio_mixer_release,
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.ioctl = btaudio_mixer_ioctl,
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};
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/* -------------------------------------------------------------- */
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static int btaudio_dsp_open(struct inode *inode, struct file *file,
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struct btaudio *bta, int analog)
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{
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down(&bta->lock);
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if (bta->users)
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goto busy;
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bta->users++;
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file->private_data = bta;
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bta->analog = analog;
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bta->dma_block = 0;
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bta->read_offset = 0;
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bta->read_count = 0;
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bta->sampleshift = 0;
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up(&bta->lock);
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return 0;
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busy:
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up(&bta->lock);
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return -EBUSY;
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}
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static int btaudio_dsp_open_digital(struct inode *inode, struct file *file)
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{
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int minor = iminor(inode);
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struct btaudio *bta;
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for (bta = btaudios; bta != NULL; bta = bta->next)
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if (bta->dsp_digital == minor)
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break;
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if (NULL == bta)
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return -ENODEV;
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|
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if (debug)
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printk("btaudio: open digital dsp [%d]\n",minor);
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return btaudio_dsp_open(inode,file,bta,0);
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}
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|
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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:
|
|
*/
|