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Diffstat (limited to 'sound/oss/au1000.c')
| -rw-r--r-- | sound/oss/au1000.c | 2216 |
1 files changed, 0 insertions, 2216 deletions
diff --git a/sound/oss/au1000.c b/sound/oss/au1000.c deleted file mode 100644 index e3796231452a..000000000000 --- a/sound/oss/au1000.c +++ /dev/null @@ -1,2216 +0,0 @@ -/* - * au1000.c -- Sound driver for Alchemy Au1000 MIPS Internet Edge - * Processor. - * - * Copyright 2001 MontaVista Software Inc. - * Author: MontaVista Software, Inc. - * stevel@mvista.com or source@mvista.com - * - * 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 SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED - * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF - * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN - * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, - * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT - * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF - * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON - * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF - * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - * - * 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. - * - * - * Module command line parameters: - * - * Supported devices: - * /dev/dsp standard OSS /dev/dsp device - * /dev/mixer standard OSS /dev/mixer device - * - * Notes: - * - * 1. Much of the OSS buffer allocation, ioctl's, and mmap'ing are - * taken, slightly modified or not at all, from the ES1371 driver, - * so refer to the credits in es1371.c for those. The rest of the - * code (probe, open, read, write, the ISR, etc.) is new. - * - * Revision history - * 06.27.2001 Initial version - * 03.20.2002 Added mutex locks around read/write methods, to prevent - * simultaneous access on SMP or preemptible kernels. Also - * removed the counter/pointer fragment aligning at the end - * of read/write methods [stevel]. - * 03.21.2002 Add support for coherent DMA on the audio read/write DMA - * channels [stevel]. - * - */ -#include <linux/module.h> -#include <linux/string.h> -#include <linux/ioport.h> -#include <linux/sched.h> -#include <linux/delay.h> -#include <linux/sound.h> -#include <linux/slab.h> -#include <linux/soundcard.h> -#include <linux/init.h> -#include <linux/page-flags.h> -#include <linux/poll.h> -#include <linux/pci.h> -#include <linux/bitops.h> -#include <linux/proc_fs.h> -#include <linux/spinlock.h> -#include <linux/smp_lock.h> -#include <linux/ac97_codec.h> -#include <linux/interrupt.h> -#include <linux/mutex.h> - -#include <asm/io.h> -#include <asm/uaccess.h> -#include <asm/mach-au1x00/au1000.h> -#include <asm/mach-au1x00/au1000_dma.h> - -/* --------------------------------------------------------------------- */ - -#undef OSS_DOCUMENTED_MIXER_SEMANTICS -#undef AU1000_DEBUG -#undef AU1000_VERBOSE_DEBUG - -#define AU1000_MODULE_NAME "Au1000 audio" -#define PFX AU1000_MODULE_NAME - -#ifdef AU1000_DEBUG -#define dbg(format, arg...) printk(KERN_DEBUG PFX ": " format "\n" , ## arg) -#else -#define dbg(format, arg...) do {} while (0) -#endif -#define err(format, arg...) printk(KERN_ERR PFX ": " format "\n" , ## arg) -#define info(format, arg...) printk(KERN_INFO PFX ": " format "\n" , ## arg) -#define warn(format, arg...) printk(KERN_WARNING PFX ": " format "\n" , ## arg) - - -/* misc stuff */ -#define POLL_COUNT 0x5000 -#define AC97_EXT_DACS (AC97_EXTID_SDAC | AC97_EXTID_CDAC | AC97_EXTID_LDAC) - -/* Boot options */ -static int vra = 0; // 0 = no VRA, 1 = use VRA if codec supports it -module_param(vra, bool, 0); -MODULE_PARM_DESC(vra, "if 1 use VRA if codec supports it"); - - -/* --------------------------------------------------------------------- */ - -struct au1000_state { - /* soundcore stuff */ - int dev_audio; - -#ifdef AU1000_DEBUG - /* debug /proc entry */ - struct proc_dir_entry *ps; - struct proc_dir_entry *ac97_ps; -#endif /* AU1000_DEBUG */ - - struct ac97_codec codec; - unsigned codec_base_caps;// AC'97 reg 00h, "Reset Register" - unsigned codec_ext_caps; // AC'97 reg 28h, "Extended Audio ID" - int no_vra; // do not use VRA - - spinlock_t lock; - struct mutex open_mutex; - struct mutex sem; - mode_t open_mode; - wait_queue_head_t open_wait; - - struct dmabuf { - unsigned int dmanr; // DMA Channel number - unsigned sample_rate; // Hz - unsigned src_factor; // SRC interp/decimation (no vra) - unsigned sample_size; // 8 or 16 - int num_channels; // 1 = mono, 2 = stereo, 4, 6 - int dma_bytes_per_sample;// DMA bytes per audio sample frame - int user_bytes_per_sample;// User bytes per audio sample frame - int cnt_factor; // user-to-DMA bytes per audio - // sample frame - void *rawbuf; - dma_addr_t dmaaddr; - unsigned buforder; - unsigned numfrag; // # of DMA fragments in DMA buffer - unsigned fragshift; - void *nextIn; // ptr to next-in to DMA buffer - void *nextOut;// ptr to next-out from DMA buffer - int count; // current byte count in DMA buffer - unsigned total_bytes; // total bytes written or read - unsigned error; // over/underrun - wait_queue_head_t wait; - /* redundant, but makes calculations easier */ - unsigned fragsize; // user perception of fragment size - unsigned dma_fragsize; // DMA (real) fragment size - unsigned dmasize; // Total DMA buffer size - // (mult. of DMA fragsize) - /* OSS stuff */ - unsigned mapped:1; - unsigned ready:1; - unsigned stopped:1; - unsigned ossfragshift; - int ossmaxfrags; - unsigned subdivision; - } dma_dac , dma_adc; -} au1000_state; - -/* --------------------------------------------------------------------- */ - - -static inline unsigned ld2(unsigned int x) -{ - unsigned r = 0; - - if (x >= 0x10000) { - x >>= 16; - r += 16; - } - if (x >= 0x100) { - x >>= 8; - r += 8; - } - if (x >= 0x10) { - x >>= 4; - r += 4; - } - if (x >= 4) { - x >>= 2; - r += 2; - } - if (x >= 2) - r++; - return r; -} - -/* --------------------------------------------------------------------- */ - -static void au1000_delay(int msec) -{ - unsigned long tmo; - signed long tmo2; - - if (in_interrupt()) - return; - - tmo = jiffies + (msec * HZ) / 1000; - for (;;) { - tmo2 = tmo - jiffies; - if (tmo2 <= 0) - break; - schedule_timeout(tmo2); - } -} - - -/* --------------------------------------------------------------------- */ - -static u16 rdcodec(struct ac97_codec *codec, u8 addr) -{ - struct au1000_state *s = (struct au1000_state *)codec->private_data; - unsigned long flags; - u32 cmd; - u16 data; - int i; - - spin_lock_irqsave(&s->lock, flags); - - for (i = 0; i < POLL_COUNT; i++) - if (!(au_readl(AC97C_STATUS) & AC97C_CP)) - break; - if (i == POLL_COUNT) - err("rdcodec: codec cmd pending expired!"); - - cmd = (u32) addr & AC97C_INDEX_MASK; - cmd |= AC97C_READ; // read command - au_writel(cmd, AC97C_CMD); - - /* now wait for the data */ - for (i = 0; i < POLL_COUNT; i++) - if (!(au_readl(AC97C_STATUS) & AC97C_CP)) - break; - if (i == POLL_COUNT) { - err("rdcodec: read poll expired!"); - return 0; - } - - data = au_readl(AC97C_CMD) & 0xffff; - - spin_unlock_irqrestore(&s->lock, flags); - - return data; -} - - -static void wrcodec(struct ac97_codec *codec, u8 addr, u16 data) -{ - struct au1000_state *s = (struct au1000_state *)codec->private_data; - unsigned long flags; - u32 cmd; - int i; - - spin_lock_irqsave(&s->lock, flags); - - for (i = 0; i < POLL_COUNT; i++) - if (!(au_readl(AC97C_STATUS) & AC97C_CP)) - break; - if (i == POLL_COUNT) - err("wrcodec: codec cmd pending expired!"); - - cmd = (u32) addr & AC97C_INDEX_MASK; - cmd &= ~AC97C_READ; // write command - cmd |= ((u32) data << AC97C_WD_BIT); // OR in the data word - au_writel(cmd, AC97C_CMD); - - spin_unlock_irqrestore(&s->lock, flags); -} - -static void waitcodec(struct ac97_codec *codec) -{ - u16 temp; - int i; - - /* codec_wait is used to wait for a ready state after - an AC97C_RESET. */ - au1000_delay(10); - - // first poll the CODEC_READY tag bit - for (i = 0; i < POLL_COUNT; i++) - if (au_readl(AC97C_STATUS) & AC97C_READY) - break; - if (i == POLL_COUNT) { - err("waitcodec: CODEC_READY poll expired!"); - return; - } - // get AC'97 powerdown control/status register - temp = rdcodec(codec, AC97_POWER_CONTROL); - - // If anything is powered down, power'em up - if (temp & 0x7f00) { - // Power on - wrcodec(codec, AC97_POWER_CONTROL, 0); - au1000_delay(100); - // Reread - temp = rdcodec(codec, AC97_POWER_CONTROL); - } - - // Check if Codec REF,ANL,DAC,ADC ready - if ((temp & 0x7f0f) != 0x000f) - err("codec reg 26 status (0x%x) not ready!!", temp); -} - - -/* --------------------------------------------------------------------- */ - -/* stop the ADC before calling */ -static void set_adc_rate(struct au1000_state *s, unsigned rate) -{ - struct dmabuf *adc = &s->dma_adc; - struct dmabuf *dac = &s->dma_dac; - unsigned adc_rate, dac_rate; - u16 ac97_extstat; - - if (s->no_vra) { - // calc SRC factor - adc->src_factor = ((96000 / rate) + 1) >> 1; - adc->sample_rate = 48000 / adc->src_factor; - return; - } - - adc->src_factor = 1; - - ac97_extstat = rdcodec(&s->codec, AC97_EXTENDED_STATUS); - - rate = rate > 48000 ? 48000 : rate; - - // enable VRA - wrcodec(&s->codec, AC97_EXTENDED_STATUS, - ac97_extstat | AC97_EXTSTAT_VRA); - // now write the sample rate - wrcodec(&s->codec, AC97_PCM_LR_ADC_RATE, (u16) rate); - // read it back for actual supported rate - adc_rate = rdcodec(&s->codec, AC97_PCM_LR_ADC_RATE); - -#ifdef AU1000_VERBOSE_DEBUG - dbg("%s: set to %d Hz", __FUNCTION__, adc_rate); -#endif - - // some codec's don't allow unequal DAC and ADC rates, in which case - // writing one rate reg actually changes both. - dac_rate = rdcodec(&s->codec, AC97_PCM_FRONT_DAC_RATE); - if (dac->num_channels > 2) - wrcodec(&s->codec, AC97_PCM_SURR_DAC_RATE, dac_rate); - if (dac->num_channels > 4) - wrcodec(&s->codec, AC97_PCM_LFE_DAC_RATE, dac_rate); - - adc->sample_rate = adc_rate; - dac->sample_rate = dac_rate; -} - -/* stop the DAC before calling */ -static void set_dac_rate(struct au1000_state *s, unsigned rate) -{ - struct dmabuf *dac = &s->dma_dac; - struct dmabuf *adc = &s->dma_adc; - unsigned adc_rate, dac_rate; - u16 ac97_extstat; - - if (s->no_vra) { - // calc SRC factor - dac->src_factor = ((96000 / rate) + 1) >> 1; - dac->sample_rate = 48000 / dac->src_factor; - return; - } - - dac->src_factor = 1; - - ac97_extstat = rdcodec(&s->codec, AC97_EXTENDED_STATUS); - - rate = rate > 48000 ? 48000 : rate; - - // enable VRA - wrcodec(&s->codec, AC97_EXTENDED_STATUS, - ac97_extstat | AC97_EXTSTAT_VRA); - // now write the sample rate - wrcodec(&s->codec, AC97_PCM_FRONT_DAC_RATE, (u16) rate); - // I don't support different sample rates for multichannel, - // so make these channels the same. - if (dac->num_channels > 2) - wrcodec(&s->codec, AC97_PCM_SURR_DAC_RATE, (u16) rate); - if (dac->num_channels > 4) - wrcodec(&s->codec, AC97_PCM_LFE_DAC_RATE, (u16) rate); - // read it back for actual supported rate - dac_rate = rdcodec(&s->codec, AC97_PCM_FRONT_DAC_RATE); - -#ifdef AU1000_VERBOSE_DEBUG - dbg("%s: set to %d Hz", __FUNCTION__, dac_rate); -#endif - - // some codec's don't allow unequal DAC and ADC rates, in which case - // writing one rate reg actually changes both. - adc_rate = rdcodec(&s->codec, AC97_PCM_LR_ADC_RATE); - - dac->sample_rate = dac_rate; - adc->sample_rate = adc_rate; -} - -static void stop_dac(struct au1000_state *s) -{ - struct dmabuf *db = &s->dma_dac; - unsigned long flags; - - if (db->stopped) - return; - - spin_lock_irqsave(&s->lock, flags); - - disable_dma(db->dmanr); - - db->stopped = 1; - - spin_unlock_irqrestore(&s->lock, flags); -} - -static void stop_adc(struct au1000_state *s) -{ - struct dmabuf *db = &s->dma_adc; - unsigned long flags; - - if (db->stopped) - return; - - spin_lock_irqsave(&s->lock, flags); - - disable_dma(db->dmanr); - - db->stopped = 1; - - spin_unlock_irqrestore(&s->lock, flags); -} - - -static void set_xmit_slots(int num_channels) -{ - u32 ac97_config = au_readl(AC97C_CONFIG) & ~AC97C_XMIT_SLOTS_MASK; - - switch (num_channels) { - case 1: // mono - case 2: // stereo, slots 3,4 - ac97_config |= (0x3 << AC97C_XMIT_SLOTS_BIT); - break; - case 4: // stereo with surround, slots 3,4,7,8 - ac97_config |= (0x33 << AC97C_XMIT_SLOTS_BIT); - break; - case 6: // stereo with surround and center/LFE, slots 3,4,6,7,8,9 - ac97_config |= (0x7b << AC97C_XMIT_SLOTS_BIT); - break; - } - - au_writel(ac97_config, AC97C_CONFIG); -} - -static void set_recv_slots(int num_channels) -{ - u32 ac97_config = au_readl(AC97C_CONFIG) & ~AC97C_RECV_SLOTS_MASK; - - /* - * Always enable slots 3 and 4 (stereo). Slot 6 is - * optional Mic ADC, which I don't support yet. - */ - ac97_config |= (0x3 << AC97C_RECV_SLOTS_BIT); - - au_writel(ac97_config, AC97C_CONFIG); -} - -static void start_dac(struct au1000_state *s) -{ - struct dmabuf *db = &s->dma_dac; - unsigned long flags; - unsigned long buf1, buf2; - - if (!db->stopped) - return; - - spin_lock_irqsave(&s->lock, flags); - - au_readl(AC97C_STATUS); // read status to clear sticky bits - - // reset Buffer 1 and 2 pointers to nextOut and nextOut+dma_fragsize - buf1 = virt_to_phys(db->nextOut); - buf2 = buf1 + db->dma_fragsize; - if (buf2 >= db->dmaaddr + db->dmasize) - buf2 -= db->dmasize; - - set_xmit_slots(db->num_channels); - - init_dma(db->dmanr); - if (get_dma_active_buffer(db->dmanr) == 0) { - clear_dma_done0(db->dmanr); // clear DMA done bit - set_dma_addr0(db->dmanr, buf1); - set_dma_addr1(db->dmanr, buf2); - } else { - clear_dma_done1(db->dmanr); // clear DMA done bit - set_dma_addr1(db->dmanr, buf1); - set_dma_addr0(db->dmanr, buf2); - } - set_dma_count(db->dmanr, db->dma_fragsize>>1); - enable_dma_buffers(db->dmanr); - - start_dma(db->dmanr); - -#ifdef AU1000_VERBOSE_DEBUG - dump_au1000_dma_channel(db->dmanr); -#endif - - db->stopped = 0; - - spin_unlock_irqrestore(&s->lock, flags); -} - -static void start_adc(struct au1000_state *s) -{ - struct dmabuf *db = &s->dma_adc; - unsigned long flags; - unsigned long buf1, buf2; - - if (!db->stopped) - return; - - spin_lock_irqsave(&s->lock, flags); - - au_readl(AC97C_STATUS); // read status to clear sticky bits - - // reset Buffer 1 and 2 pointers to nextIn and nextIn+dma_fragsize - buf1 = virt_to_phys(db->nextIn); - buf2 = buf1 + db->dma_fragsize; - if (buf2 >= db->dmaaddr + db->dmasize) - buf2 -= db->dmasize; - - set_recv_slots(db->num_channels); - - init_dma(db->dmanr); - if (get_dma_active_buffer(db->dmanr) == 0) { - clear_dma_done0(db->dmanr); // clear DMA done bit - set_dma_addr0(db->dmanr, buf1); - set_dma_addr1(db->dmanr, buf2); - } else { - clear_dma_done1(db->dmanr); // clear DMA done bit - set_dma_addr1(db->dmanr, buf1); - set_dma_addr0(db->dmanr, buf2); - } - set_dma_count(db->dmanr, db->dma_fragsize>>1); - enable_dma_buffers(db->dmanr); - - start_dma(db->dmanr); - -#ifdef AU1000_VERBOSE_DEBUG - dump_au1000_dma_channel(db->dmanr); -#endif - - db->stopped = 0; - - spin_unlock_irqrestore(&s->lock, flags); -} - -/* --------------------------------------------------------------------- */ - -#define DMABUF_DEFAULTORDER (17-PAGE_SHIFT) -#define DMABUF_MINORDER 1 - -static inline void dealloc_dmabuf(struct au1000_state *s, struct dmabuf *db) -{ - struct page *page, *pend; - - if (db->rawbuf) { - /* undo marking the pages as reserved */ - pend = virt_to_page(db->rawbuf + - (PAGE_SIZE << db->buforder) - 1); - for (page = virt_to_page(db->rawbuf); page <= pend; page++) - ClearPageReserved(page); - dma_free_noncoherent(NULL, - PAGE_SIZE << db->buforder, - db->rawbuf, - db->dmaaddr); - } - db->rawbuf = db->nextIn = db->nextOut = NULL; - db->mapped = db->ready = 0; -} - -static int prog_dmabuf(struct au1000_state *s, struct dmabuf *db) -{ - int order; - unsigned user_bytes_per_sec; - unsigned bufs; - struct page *page, *pend; - unsigned rate = db->sample_rate; - - if (!db->rawbuf) { - db->ready = db->mapped = 0; - for (order = DMABUF_DEFAULTORDER; - order >= DMABUF_MINORDER; order--) - if ((db->rawbuf = dma_alloc_noncoherent(NULL, - PAGE_SIZE << order, - &db->dmaaddr, - 0))) - break; - if (!db->rawbuf) - return -ENOMEM; - db->buforder = order; - /* now mark the pages as reserved; - otherwise remap_pfn_range doesn't do what we want */ - pend = virt_to_page(db->rawbuf + - (PAGE_SIZE << db->buforder) - 1); - for (page = virt_to_page(db->rawbuf); page <= pend; page++) - SetPageReserved(page); - } - - db->cnt_factor = 1; - if (db->sample_size == 8) - db->cnt_factor *= 2; - if (db->num_channels == 1) - db->cnt_factor *= 2; - db->cnt_factor *= db->src_factor; - - db->count = 0; - db->nextIn = db->nextOut = db->rawbuf; - - db->user_bytes_per_sample = (db->sample_size>>3) * db->num_channels; - db->dma_bytes_per_sample = 2 * ((db->num_channels == 1) ? - 2 : db->num_channels); - - user_bytes_per_sec = rate * db->user_bytes_per_sample; - bufs = PAGE_SIZE << db->buforder; - if (db->ossfragshift) { - if ((1000 << db->ossfragshift) < user_bytes_per_sec) - db->fragshift = ld2(user_bytes_per_sec/1000); - else - db->fragshift = db->ossfragshift; - } else { - db->fragshift = ld2(user_bytes_per_sec / 100 / - (db->subdivision ? db->subdivision : 1)); - if (db->fragshift < 3) - db->fragshift = 3; - } - - db->fragsize = 1 << db->fragshift; - db->dma_fragsize = db->fragsize * db->cnt_factor; - db->numfrag = bufs / db->dma_fragsize; - - while (db->numfrag < 4 && db->fragshift > 3) { - db->fragshift--; - db->fragsize = 1 << db->fragshift; - db->dma_fragsize = db->fragsize * db->cnt_factor; - db->numfrag = bufs / db->dma_fragsize; - } - - if (db->ossmaxfrags >= 4 && db->ossmaxfrags < db->numfrag) - db->numfrag = db->ossmaxfrags; - - db->dmasize = db->dma_fragsize * db->numfrag; - memset(db->rawbuf, 0, bufs); - -#ifdef AU1000_VERBOSE_DEBUG - dbg("rate=%d, samplesize=%d, channels=%d", - rate, db->sample_size, db->num_channels); - dbg("fragsize=%d, cnt_factor=%d, dma_fragsize=%d", - db->fragsize, db->cnt_factor, db->dma_fragsize); - dbg("numfrag=%d, dmasize=%d", db->numfrag, db->dmasize); -#endif - - db->ready = 1; - return 0; -} - -static inline int prog_dmabuf_adc(struct au1000_state *s) -{ - stop_adc(s); - return prog_dmabuf(s, &s->dma_adc); - -} - -static inline int prog_dmabuf_dac(struct au1000_state *s) -{ - stop_dac(s); - return prog_dmabuf(s, &s->dma_dac); -} - - -/* hold spinlock for the following */ -static irqreturn_t dac_dma_interrupt(int irq, void *dev_id, struct pt_regs *regs) -{ - struct au1000_state *s = (struct au1000_state *) dev_id; - struct dmabuf *dac = &s->dma_dac; - unsigned long newptr; - u32 ac97c_stat, buff_done; - - ac97c_stat = au_readl(AC97C_STATUS); -#ifdef AU1000_VERBOSE_DEBUG - if (ac97c_stat & (AC97C_XU | AC97C_XO | AC97C_TE)) - dbg("AC97C status = 0x%08x", ac97c_stat); -#endif - - if ((buff_done = get_dma_buffer_done(dac->dmanr)) == 0) { - /* fastpath out, to ease interrupt sharing */ - return IRQ_HANDLED; - } - - spin_lock(&s->lock); - - if (buff_done != (DMA_D0 | DMA_D1)) { - dac->nextOut += dac->dma_fragsize; - if (dac->nextOut >= dac->rawbuf + dac->dmasize) - dac->nextOut -= dac->dmasize; - - /* update playback pointers */ - newptr = virt_to_phys(dac->nextOut) + dac->dma_fragsize; - if (newptr >= dac->dmaaddr + dac->dmasize) - newptr -= dac->dmasize; - - dac->count -= dac->dma_fragsize; - dac->total_bytes += dac->dma_fragsize; - - if (dac->count <= 0) { -#ifdef AU1000_VERBOSE_DEBUG - dbg("dac underrun"); -#endif - spin_unlock(&s->lock); - stop_dac(s); - spin_lock(&s->lock); - dac->count = 0; - dac->nextIn = dac->nextOut; - } else if (buff_done == DMA_D0) { - clear_dma_done0(dac->dmanr); // clear DMA done bit - set_dma_count0(dac->dmanr, dac->dma_fragsize>>1); - set_dma_addr0(dac->dmanr, newptr); - enable_dma_buffer0(dac->dmanr); // reenable - } else { - clear_dma_done1(dac->dmanr); // clear DMA done bit - set_dma_count1(dac->dmanr, dac->dma_fragsize>>1); - set_dma_addr1(dac->dmanr, newptr); - enable_dma_buffer1(dac->dmanr); // reenable - } - } else { - // both done bits set, we missed an interrupt - spin_unlock(&s->lock); - stop_dac(s); - spin_lock(&s->lock); - - dac->nextOut += 2*dac->dma_fragsize; - if (dac->nextOut >= dac->rawbuf + dac->dmasize) - dac->nextOut -= dac->dmasize; - - dac->count -= 2*dac->dma_fragsize; - dac->total_bytes += 2*dac->dma_fragsize; - - if (dac->count > 0) { - spin_unlock(&s->lock); - start_dac(s); - spin_lock(&s->lock); - } - } - - /* wake up anybody listening */ - if (waitqueue_active(&dac->wait)) - wake_up(&dac->wait); - - spin_unlock(&s->lock); - - return IRQ_HANDLED; -} - - -static irqreturn_t adc_dma_interrupt(int irq, void *dev_id, struct pt_regs *regs) -{ - struct au1000_state *s = (struct au1000_state *) dev_id; - struct dmabuf *adc = &s->dma_adc; - unsigned long newptr; - u32 ac97c_stat, buff_done; - - ac97c_stat = au_readl(AC97C_STATUS); -#ifdef AU1000_VERBOSE_DEBUG - if (ac97c_stat & (AC97C_RU | AC97C_RO)) - dbg("AC97C status = 0x%08x", ac97c_stat); -#endif - - if ((buff_done = get_dma_buffer_done(adc->dmanr)) == 0) { - /* fastpath out, to ease interrupt sharing */ - return IRQ_HANDLED; - } - - spin_lock(&s->lock); - - if (buff_done != (DMA_D0 | DMA_D1)) { - if (adc->count + adc->dma_fragsize > adc->dmasize) { - // Overrun. Stop ADC and log the error - spin_unlock(&s->lock); - stop_adc(s); - adc->error++; - err("adc overrun"); - return IRQ_NONE; - } - - adc->nextIn += adc->dma_fragsize; - if (adc->nextIn >= adc->rawbuf + adc->dmasize) - adc->nextIn -= adc->dmasize; - - /* update capture pointers */ - newptr = virt_to_phys(adc->nextIn) + adc->dma_fragsize; - if (newptr >= adc->dmaaddr + adc->dmasize) - newptr -= adc->dmasize; - - adc->count += adc->dma_fragsize; - adc->total_bytes += adc->dma_fragsize; - - if (buff_done == DMA_D0) { - clear_dma_done0(adc->dmanr); // clear DMA done bit - set_dma_count0(adc->dmanr, adc->dma_fragsize>>1); - set_dma_addr0(adc->dmanr, newptr); - enable_dma_buffer0(adc->dmanr); // reenable - } else { - clear_dma_done1(adc->dmanr); // clear DMA done bit - set_dma_count1(adc->dmanr, adc->dma_fragsize>>1); - set_dma_addr1(adc->dmanr, newptr); - enable_dma_buffer1(adc->dmanr); // reenable - } - } else { - // both done bits set, we missed an interrupt - spin_unlock(&s->lock); - stop_adc(s); - spin_lock(&s->lock); - - if (adc->count + 2*adc->dma_fragsize > adc->dmasize) { - // Overrun. Log the error - adc->error++; - err("adc overrun"); - spin_unlock(&s->lock); - return IRQ_NONE; - } - - adc->nextIn += 2*adc->dma_fragsize; - if (adc->nextIn >= adc->rawbuf + adc->dmasize) - adc->nextIn -= adc->dmasize; - - adc->count += 2*adc->dma_fragsize; - adc->total_bytes += 2*adc->dma_fragsize; - - spin_unlock(&s->lock); - start_adc(s); - spin_lock(&s->lock); - } - - /* wake up anybody listening */ - if (waitqueue_active(&adc->wait)) - wake_up(&adc->wait); - - spin_unlock(&s->lock); - - return IRQ_HANDLED; -} - -/* --------------------------------------------------------------------- */ - -static loff_t au1000_llseek(struct file *file, loff_t offset, int origin) -{ - return -ESPIPE; -} - - -static int au1000_open_mixdev(struct inode *inode, struct file *file) -{ - file->private_data = &au1000_state; - return nonseekable_open(inode, file); -} - -static int au1000_release_mixdev(struct inode *inode, struct file *file) -{ - return 0; -} - -static int mixdev_ioctl(struct ac97_codec *codec, unsigned int cmd, - unsigned long arg) -{ - return codec->mixer_ioctl(codec, cmd, arg); -} - -static int au1000_ioctl_mixdev(struct inode *inode, struct file *file, - unsigned int cmd, unsigned long arg) -{ - struct au1000_state *s = (struct au1000_state *)file->private_data; - struct ac97_codec *codec = &s->codec; - - return mixdev_ioctl(codec, cmd, arg); -} - -static /*const */ struct file_operations au1000_mixer_fops = { - .owner = THIS_MODULE, - .llseek = au1000_llseek, - .ioctl = au1000_ioctl_mixdev, - .open = au1000_open_mixdev, - .release = au1000_release_mixdev, -}; - -/* --------------------------------------------------------------------- */ - -static int drain_dac(struct au1000_state *s, int nonblock) -{ - unsigned long flags; - int count, tmo; - - if (s->dma_dac.mapped || !s->dma_dac.ready || s->dma_dac.stopped) - return 0; - - for (;;) { - spin_lock_irqsave(&s->lock, flags); - count = s->dma_dac.count; - spin_unlock_irqrestore(&s->lock, flags); - if (count <= 0) - break; - if (signal_pending(current)) - break; - if (nonblock) - return -EBUSY; - tmo = 1000 * count / (s->no_vra ? - 48000 : s->dma_dac.sample_rate); - tmo /= s->dma_dac.dma_bytes_per_sample; - au1000_delay(tmo); - } - if (signal_pending(current)) - return -ERESTARTSYS; - return 0; -} - -/* --------------------------------------------------------------------- */ - -static inline u8 S16_TO_U8(s16 ch) -{ - return (u8) (ch >> 8) + 0x80; -} -static inline s16 U8_TO_S16(u8 ch) -{ - return (s16) (ch - 0x80) << 8; -} - -/* - * Translates user samples to dma buffer suitable for AC'97 DAC data: - * If mono, copy left channel to right channel in dma buffer. - * If 8 bit samples, cvt to 16-bit before writing to dma buffer. - * If interpolating (no VRA), duplicate every audio frame src_factor times. - */ -static int translate_from_user(struct dmabuf *db, - char* dmabuf, - char* userbuf, - int dmacount) -{ - int sample, i; - int interp_bytes_per_sample; - int num_samples; - int mono = (db->num_channels == 1); - char usersample[12]; - s16 ch, dmasample[6]; - - if (db->sample_size == 16 && !mono && db->src_factor == 1) { - // no translation necessary, just copy - if (copy_from_user(dmabuf, userbuf, dmacount)) - return -EFAULT; - return dmacount; - } - - interp_bytes_per_sample = db->dma_bytes_per_sample * db->src_factor; - num_samples = dmacount / interp_bytes_per_sample; - - for (sample = 0; sample < num_samples; sample++) { - if (copy_from_user(usersample, userbuf, - db->user_bytes_per_sample)) { - dbg("%s: fault", __FUNCTION__); - return -EFAULT; - } - - for (i = 0; i < db->num_channels; i++) { - if (db->sample_size == 8) - ch = U8_TO_S16(usersample[i]); - else - ch = *((s16 *) (&usersample[i * 2])); - dmasample[i] = ch; - if (mono) - dmasample[i + 1] = ch; // right channel - } - - // duplicate every audio frame src_factor times - for (i = 0; i < db->src_factor; i++) - memcpy(dmabuf, dmasample, db->dma_bytes_per_sample); - - userbuf += db->user_bytes_per_sample; - dmabuf += interp_bytes_per_sample; - } - - return num_samples * interp_bytes_per_sample; -} - -/* - * Translates AC'97 ADC samples to user buffer: - * If mono, send only left channel to user buffer. - * If 8 bit samples, cvt from 16 to 8 bit before writing to user buffer. - * If decimating (no VRA), skip over src_factor audio frames. - */ -static int translate_to_user(struct dmabuf *db, - char* userbuf, - char* dmabuf, - int dmacount) -{ - int sample, i; - int interp_bytes_per_sample; - int num_samples; - int mono = (db->num_channels == 1); - char usersample[12]; - - if (db->sample_size == 16 && !mono && db->src_factor == 1) { - // no translation necessary, just copy - if (copy_to_user(userbuf, dmabuf, dmacount)) - return -EFAULT; - return dmacount; - } - - interp_bytes_per_sample = db->dma_bytes_per_sample * db->src_factor; - num_samples = dmacount / interp_bytes_per_sample; - - for (sample = 0; sample < num_samples; sample++) { - for (i = 0; i < db->num_channels; i++) { - if (db->sample_size == 8) - usersample[i] = - S16_TO_U8(*((s16 *) (&dmabuf[i * 2]))); - else - *((s16 *) (&usersample[i * 2])) = - *((s16 *) (&dmabuf[i * 2])); - } - - if (copy_to_user(userbuf, usersample, - db->user_bytes_per_sample)) { - dbg("%s: fault", __FUNCTION__); - return -EFAULT; - } - - userbuf += db->user_bytes_per_sample; - dmabuf += interp_bytes_per_sample; - } - - return num_samples * interp_bytes_per_sample; -} - -/* - * Copy audio data to/from user buffer from/to dma buffer, taking care - * that we wrap when reading/writing the dma buffer. Returns actual byte - * count written to or read from the dma buffer. - */ -static int copy_dmabuf_user(struct dmabuf *db, char* userbuf, - int count, int to_user) -{ - char *bufptr = to_user ? db->nextOut : db->nextIn; - char *bufend = db->rawbuf + db->dmasize; - int cnt, ret; - - if (bufptr + count > bufend) { - int partial = (int) (bufend - bufptr); - if (to_user) { - if ((cnt = translate_to_user(db, userbuf, - bufptr, partial)) < 0) - return cnt; - ret = cnt; - if ((cnt = translate_to_user(db, userbuf + partial, - db->rawbuf, - count - partial)) < 0) - return cnt; - ret += cnt; - } else { - if ((cnt = translate_from_user(db, bufptr, userbuf, - partial)) < 0) - return cnt; - ret = cnt; - if ((cnt = translate_from_user(db, db->rawbuf, - userbuf + partial, - count - partial)) < 0) - return cnt; - ret += cnt; - } - } else { - if (to_user) - ret = translate_to_user(db, userbuf, bufptr, count); - else - ret = translate_from_user(db, bufptr, userbuf, count); - } - - return ret; -} - - -static ssize_t au1000_read(struct file *file, char *buffer, - size_t count, loff_t *ppos) -{ - struct au1000_state *s = (struct au1000_state *)file->private_data; - struct dmabuf *db = &s->dma_adc; - DECLARE_WAITQUEUE(wait, current); - ssize_t ret; - unsigned long flags; - int cnt, usercnt, avail; - - if (db->mapped) - return -ENXIO; - if (!access_ok(VERIFY_WRITE, buffer, count)) - return -EFAULT; - ret = 0; - - count *= db->cnt_factor; - - mutex_lock(&s->sem); - add_wait_queue(&db->wait, &wait); - - while (count > 0) { - // wait for samples in ADC dma buffer - do { - if (db->stopped) - start_adc(s); - spin_lock_irqsave(&s->lock, flags); - avail = db->count; - if (avail <= 0) - __set_current_state(TASK_INTERRUPTIBLE); - spin_unlock_irqrestore(&s->lock, flags); - if (avail <= 0) { - if (file->f_flags & O_NONBLOCK) { - if (!ret) - ret = -EAGAIN; - goto out; - } - mutex_unlock(&s->sem); - schedule(); - if (signal_pending(current)) { - if (!ret) - ret = -ERESTARTSYS; - goto out2; - } - mutex_lock(&s->sem); - } - } while (avail <= 0); - - // copy from nextOut to user - if ((cnt = copy_dmabuf_user(db, buffer, - count > avail ? - avail : count, 1)) < 0) { - if (!ret) - ret = -EFAULT; - goto out; - } - - spin_lock_irqsave(&s->lock, flags); - db->count -= cnt; - db->nextOut += cnt; - if (db->nextOut >= db->rawbuf + db->dmasize) - db->nextOut -= db->dmasize; - spin_unlock_irqrestore(&s->lock, flags); - - count -= cnt; - usercnt = cnt / db->cnt_factor; - buffer += usercnt; - ret += usercnt; - } // while (count > 0) - -out: - mutex_unlock(&s->sem); -out2: - remove_wait_queue(&db->wait, &wait); - set_current_state(TASK_RUNNING); - return ret; -} - -static ssize_t au1000_write(struct file *file, const char *buffer, - size_t count, loff_t * ppos) -{ - struct au1000_state *s = (struct au1000_state *)file->private_data; - struct dmabuf *db = &s->dma_dac; - DECLARE_WAITQUEUE(wait, current); - ssize_t ret = 0; - unsigned long flags; - int cnt, usercnt, avail; - -#ifdef AU1000_VERBOSE_DEBUG - dbg("write: count=%d", count); -#endif - - if (db->mapped) - return -ENXIO; - if (!access_ok(VERIFY_READ, buffer, count)) - return -EFAULT; - - count *= db->cnt_factor; - - mutex_lock(&s->sem); - add_wait_queue(&db->wait, &wait); - - while (count > 0) { - // wait for space in playback buffer - do { - spin_lock_irqsave(&s->lock, flags); - avail = (int) db->dmasize - db->count; - if (avail <= 0) - __set_current_state(TASK_INTERRUPTIBLE); - spin_unlock_irqrestore(&s->lock, flags); - if (avail <= 0) { - if (file->f_flags & O_NONBLOCK) { - if (!ret) - ret = -EAGAIN; - goto out; - } - mutex_unlock(&s->sem); - schedule(); - if (signal_pending(current)) { - if (!ret) - ret = -ERESTARTSYS; - goto out2; - } - mutex_lock(&s->sem); - } - } while (avail <= 0); - - // copy from user to nextIn - if ((cnt = copy_dmabuf_user(db, (char *) buffer, - count > avail ? - avail : count, 0)) < 0) { - if (!ret) - ret = -EFAULT; - goto out; - } - - spin_lock_irqsave(&s->lock, flags); - db->count += cnt; - db->nextIn += cnt; - if (db->nextIn >= db->rawbuf + db->dmasize) - db->nextIn -= db->dmasize; - spin_unlock_irqrestore(&s->lock, flags); - if (db->stopped) - start_dac(s); - - count -= cnt; - usercnt = cnt / db->cnt_factor; - buffer += usercnt; - ret += usercnt; - } // while (count > 0) - -out: - mutex_unlock(&s->sem); -out2: - remove_wait_queue(&db->wait, &wait); - set_current_state(TASK_RUNNING); - return ret; -} - - -/* No kernel lock - we have our own spinlock */ -static unsigned int au1000_poll(struct file *file, - struct poll_table_struct *wait) -{ - struct au1000_state *s = (struct au1000_state *)file->private_data; - unsigned long flags; - unsigned int mask = 0; - - if (file->f_mode & FMODE_WRITE) { - if (!s->dma_dac.ready) - return 0; - poll_wait(file, &s->dma_dac.wait, wait); - } - if (file->f_mode & FMODE_READ) { - if (!s->dma_adc.ready) - return 0; - poll_wait(file, &s->dma_adc.wait, wait); - } - - spin_lock_irqsave(&s->lock, flags); - - if (file->f_mode & FMODE_READ) { - if (s->dma_adc.count >= (signed)s->dma_adc.dma_fragsize) - mask |= POLLIN | POLLRDNORM; - } - if (file->f_mode & FMODE_WRITE) { - if (s->dma_dac.mapped) { - if (s->dma_dac.count >= - (signed)s->dma_dac.dma_fragsize) - mask |= POLLOUT | POLLWRNORM; - } else { - if ((signed) s->dma_dac.dmasize >= - s->dma_dac.count + (signed)s->dma_dac.dma_fragsize) - mask |= POLLOUT | POLLWRNORM; - } - } - spin_unlock_irqrestore(&s->lock, flags); - return mask; -} - -static int au1000_mmap(struct file *file, struct vm_area_struct *vma) -{ - struct au1000_state *s = (struct au1000_state *)file->private_data; - struct dmabuf *db; - unsigned long size; - int ret = 0; - - dbg("%s", __FUNCTION__); - - lock_kernel(); - mutex_lock(&s->sem); - if (vma->vm_flags & VM_WRITE) - db = &s->dma_dac; - else if (vma->vm_flags & VM_READ) - db = &s->dma_adc; - else { - ret = -EINVAL; - goto out; - } - if (vma->vm_pgoff != 0) { - ret = -EINVAL; - goto out; - } - size = vma->vm_end - vma->vm_start; - if (size > (PAGE_SIZE << db->buforder)) { - ret = -EINVAL; - goto out; - } - if (remap_pfn_range(vma, vma->vm_start, virt_to_phys(db->rawbuf), - size, vma->vm_page_prot)) { - ret = -EAGAIN; - goto out; - } - vma->vm_flags &= ~VM_IO; - db->mapped = 1; -out: - mutex_unlock(&s->sem); - unlock_kernel(); - return ret; -} - - -#ifdef AU1000_VERBOSE_DEBUG -static struct ioctl_str_t { - unsigned int cmd; - const char *str; -} ioctl_str[] = { - {SNDCTL_DSP_RESET, "SNDCTL_DSP_RESET"}, - {SNDCTL_DSP_SYNC, "SNDCTL_DSP_SYNC"}, - {SNDCTL_DSP_SPEED, "SNDCTL_DSP_SPEED"}, - {SNDCTL_DSP_STEREO, "SNDCTL_DSP_STEREO"}, - {SNDCTL_DSP_GETBLKSIZE, "SNDCTL_DSP_GETBLKSIZE"}, - {SNDCTL_DSP_SAMPLESIZE, "SNDCTL_DSP_SAMPLESIZE"}, - {SNDCTL_DSP_CHANNELS, "SNDCTL_DSP_CHANNELS"}, - {SOUND_PCM_WRITE_CHANNELS, "SOUND_PCM_WRITE_CHANNELS"}, - {SOUND_PCM_WRITE_FILTER, "SOUND_PCM_WRITE_FILTER"}, - {SNDCTL_DSP_POST, "SNDCTL_DSP_POST"}, - {SNDCTL_DSP_SUBDIVIDE, "SNDCTL_DSP_SUBDIVIDE"}, - {SNDCTL_DSP_SETFRAGMENT, "SNDCTL_DSP_SETFRAGMENT"}, - {SNDCTL_DSP_GETFMTS, "SNDCTL_DSP_GETFMTS"}, - {SNDCTL_DSP_SETFMT, "SNDCTL_DSP_SETFMT"}, - {SNDCTL_DSP_GETOSPACE, "SNDCTL_DSP_GETOSPACE"}, - {SNDCTL_DSP_GETISPACE, "SNDCTL_DSP_GETISPACE"}, - {SNDCTL_DSP_NONBLOCK, "SNDCTL_DSP_NONBLOCK"}, - {SNDCTL_DSP_GETCAPS, "SNDCTL_DSP_GETCAPS"}, - {SNDCTL_DSP_GETTRIGGER, "SNDCTL_DSP_GETTRIGGER"}, - {SNDCTL_DSP_SETTRIGGER, "SNDCTL_DSP_SETTRIGGER"}, - {SNDCTL_DSP_GETIPTR, "SNDCTL_DSP_GETIPTR"}, - {SNDCTL_DSP_GETOPTR, "SNDCTL_DSP_GETOPTR"}, - {SNDCTL_DSP_MAPINBUF, "SNDCTL_DSP_MAPINBUF"}, - {SNDCTL_DSP_MAPOUTBUF, "SNDCTL_DSP_MAPOUTBUF"}, - {SNDCTL_DSP_SETSYNCRO, "SNDCTL_DSP_SETSYNCRO"}, - {SNDCTL_DSP_SETDUPLEX, "SNDCTL_DSP_SETDUPLEX"}, - {SNDCTL_DSP_GETODELAY, "SNDCTL_DSP_GETODELAY"}, - {SNDCTL_DSP_GETCHANNELMASK, "SNDCTL_DSP_GETCHANNELMASK"}, - {SNDCTL_DSP_BIND_CHANNEL, "SNDCTL_DSP_BIND_CHANNEL"}, - {OSS_GETVERSION, "OSS_GETVERSION"}, - {SOUND_PCM_READ_RATE, "SOUND_PCM_READ_RATE"}, - {SOUND_PCM_READ_CHANNELS, "SOUND_PCM_READ_CHANNELS"}, - {SOUND_PCM_READ_BITS, "SOUND_PCM_READ_BITS"}, - {SOUND_PCM_READ_FILTER, "SOUND_PCM_READ_FILTER"} -}; -#endif - -// Need to hold a spin-lock before calling this! -static int dma_count_done(struct dmabuf *db) -{ - if (db->stopped) - return 0; - - return db->dma_fragsize - get_dma_residue(db->dmanr); -} - - -static int au1000_ioctl(struct inode *inode, struct file *file, - unsigned int cmd, unsigned long arg) -{ - struct au1000_state *s = (struct au1000_state *)file->private_data; - unsigned long flags; - audio_buf_info abinfo; - count_info cinfo; - int count; - int val, mapped, ret, diff; - - mapped = ((file->f_mode & FMODE_WRITE) && s->dma_dac.mapped) || - ((file->f_mode & FMODE_READ) && s->dma_adc.mapped); - -#ifdef AU1000_VERBOSE_DEBUG - for (count=0; count<sizeof(ioctl_str)/sizeof(ioctl_str[0]); count++) { - if (ioctl_str[count].cmd == cmd) - break; - } - if (count < sizeof(ioctl_str) / sizeof(ioctl_str[0])) - dbg("ioctl %s, arg=0x%lx", ioctl_str[count].str, arg); - else - dbg("ioctl 0x%x unknown, arg=0x%lx", cmd, arg); -#endif - - switch (cmd) { - case OSS_GETVERSION: - return put_user(SOUND_VERSION, (int *) arg); - - case SNDCTL_DSP_SYNC: - if (file->f_mode & FMODE_WRITE) - return drain_dac(s, file->f_flags & O_NONBLOCK); - return 0; - - case SNDCTL_DSP_SETDUPLEX: - return 0; - - case SNDCTL_DSP_GETCAPS: - return put_user(DSP_CAP_DUPLEX | DSP_CAP_REALTIME | - DSP_CAP_TRIGGER | DSP_CAP_MMAP, (int *)arg); - - case SNDCTL_DSP_RESET: - if (file->f_mode & FMODE_WRITE) { - stop_dac(s); - synchronize_irq(); - s->dma_dac.count = s->dma_dac.total_bytes = 0; - s->dma_dac.nextIn = s->dma_dac.nextOut = - s->dma_dac.rawbuf; - } - if (file->f_mode & FMODE_READ) { - stop_adc(s); - synchronize_irq(); - s->dma_adc.count = s->dma_adc.total_bytes = 0; - s->dma_adc.nextIn = s->dma_adc.nextOut = - s->dma_adc.rawbuf; - } - return 0; - - case SNDCTL_DSP_SPEED: - if (get_user(val, (int *) arg)) - return -EFAULT; - if (val >= 0) { - if (file->f_mode & FMODE_READ) { - stop_adc(s); - set_adc_rate(s, val); - } - if (file->f_mode & FMODE_WRITE) { - stop_dac(s); - set_dac_rate(s, val); - } - if (s->open_mode & FMODE_READ) - if ((ret = prog_dmabuf_adc(s))) - return ret; - if (s->open_mode & FMODE_WRITE) - if ((ret = prog_dmabuf_dac(s))) - return ret; - } - return put_user((file->f_mode & FMODE_READ) ? - s->dma_adc.sample_rate : - s->dma_dac.sample_rate, - (int *)arg); - - case SNDCTL_DSP_STEREO: - if (get_user(val, (int *) arg)) - return -EFAULT; - if (file->f_mode & FMODE_READ) { - stop_adc(s); - s->dma_adc.num_channels = val ? 2 : 1; - if ((ret = prog_dmabuf_adc(s))) - return ret; - } - if (file->f_mode & FMODE_WRITE) { - stop_dac(s); - s->dma_dac.num_channels = val ? 2 : 1; - if (s->codec_ext_caps & AC97_EXT_DACS) { - // disable surround and center/lfe in AC'97 - u16 ext_stat = rdcodec(&s->codec, - AC97_EXTENDED_STATUS); - wrcodec(&s->codec, AC97_EXTENDED_STATUS, - ext_stat | (AC97_EXTSTAT_PRI | - AC97_EXTSTAT_PRJ | - AC97_EXTSTAT_PRK)); - } - if ((ret = prog_dmabuf_dac(s))) - return ret; - } - return 0; - - case SNDCTL_DSP_CHANNELS: - if (get_user(val, (int *) arg)) - return -EFAULT; - if (val != 0) { - if (file->f_mode & FMODE_READ) { - if (val < 0 || val > 2) - return -EINVAL; - stop_adc(s); - s->dma_adc.num_channels = val; - if ((ret = prog_dmabuf_adc(s))) - return ret; - } - if (file->f_mode & FMODE_WRITE) { - switch (val) { - case 1: - case 2: - break; - case 3: - case 5: - return -EINVAL; - case 4: - if (!(s->codec_ext_caps & - AC97_EXTID_SDAC)) - return -EINVAL; - break; - case 6: - if ((s->codec_ext_caps & - AC97_EXT_DACS) != AC97_EXT_DACS) - return -EINVAL; - break; - default: - return -EINVAL; - } - - stop_dac(s); - if (val <= 2 && - (s->codec_ext_caps & AC97_EXT_DACS)) { - // disable surround and center/lfe - // channels in AC'97 - u16 ext_stat = - rdcodec(&s->codec, - AC97_EXTENDED_STATUS); - wrcodec(&s->codec, - AC97_EXTENDED_STATUS, - ext_stat | (AC97_EXTSTAT_PRI | - AC97_EXTSTAT_PRJ | - AC97_EXTSTAT_PRK)); - } else if (val >= 4) { - // enable surround, center/lfe - // channels in AC'97 - u16 ext_stat = - rdcodec(&s->codec, - AC97_EXTENDED_STATUS); - ext_stat &= ~AC97_EXTSTAT_PRJ; - if (val == 6) - ext_stat &= - ~(AC97_EXTSTAT_PRI | - AC97_EXTSTAT_PRK); - wrcodec(&s->codec, - AC97_EXTENDED_STATUS, - ext_stat); - } - - s->dma_dac.num_channels = val; - if ((ret = prog_dmabuf_dac(s))) - return ret; - } - } - return put_user(val, (int *) arg); - - case SNDCTL_DSP_GETFMTS: /* Returns a mask */ - return put_user(AFMT_S16_LE | AFMT_U8, (int *) arg); - - case SNDCTL_DSP_SETFMT: /* Selects ONE fmt */ - if (get_user(val, (int *) arg)) - return -EFAULT; - if (val != AFMT_QUERY) { - if (file->f_mode & FMODE_READ) { - stop_adc(s); - if (val == AFMT_S16_LE) - s->dma_adc.sample_size = 16; - else { - val = AFMT_U8; - s->dma_adc.sample_size = 8; - } - if ((ret = prog_dmabuf_adc(s))) - return ret; - } - if (file->f_mode & FMODE_WRITE) { - stop_dac(s); - if (val == AFMT_S16_LE) - s->dma_dac.sample_size = 16; - else { - val = AFMT_U8; - s->dma_dac.sample_size = 8; - } - if ((ret = prog_dmabuf_dac(s))) - return ret; - } - } else { - if (file->f_mode & FMODE_READ) - val = (s->dma_adc.sample_size == 16) ? - AFMT_S16_LE : AFMT_U8; - else - val = (s->dma_dac.sample_size == 16) ? - AFMT_S16_LE : AFMT_U8; - } - return put_user(val, (int *) arg); - - case SNDCTL_DSP_POST: - return 0; - - case SNDCTL_DSP_GETTRIGGER: - val = 0; - spin_lock_irqsave(&s->lock, flags); - if (file->f_mode & FMODE_READ && !s->dma_adc.stopped) - val |= PCM_ENABLE_INPUT; - if (file->f_mode & FMODE_WRITE && !s->dma_dac.stopped) - val |= PCM_ENABLE_OUTPUT; - spin_unlock_irqrestore(&s->lock, flags); - return put_user(val, (int *) arg); - - case SNDCTL_DSP_SETTRIGGER: - if (get_user(val, (int *) arg)) - return -EFAULT; - if (file->f_mode & FMODE_READ) { - if (val & PCM_ENABLE_INPUT) - start_adc(s); - else - stop_adc(s); - } - if (file->f_mode & FMODE_WRITE) { - if (val & PCM_ENABLE_OUTPUT) - start_dac(s); - else - stop_dac(s); - } - return 0; - - case SNDCTL_DSP_GETOSPACE: - if (!(file->f_mode & FMODE_WRITE)) - return -EINVAL; - abinfo.fragsize = s->dma_dac.fragsize; - spin_lock_irqsave(&s->lock, flags); - count = s->dma_dac.count; - count -= dma_count_done(&s->dma_dac); - spin_unlock_irqrestore(&s->lock, flags); - if (count < 0) - count = 0; - abinfo.bytes = (s->dma_dac.dmasize - count) / - s->dma_dac.cnt_factor; - abinfo.fragstotal = s->dma_dac.numfrag; - abinfo.fragments = abinfo.bytes >> s->dma_dac.fragshift; -#ifdef AU1000_VERBOSE_DEBUG - dbg("bytes=%d, fragments=%d", abinfo.bytes, abinfo.fragments); -#endif - return copy_to_user((void *) arg, &abinfo, - sizeof(abinfo)) ? -EFAULT : 0; - - case SNDCTL_DSP_GETISPACE: - if (!(file->f_mode & FMODE_READ)) - return -EINVAL; - abinfo.fragsize = s->dma_adc.fragsize; - spin_lock_irqsave(&s->lock, flags); - count = s->dma_adc.count; - count += dma_count_done(&s->dma_adc); - spin_unlock_irqrestore(&s->lock, flags); - if (count < 0) - count = 0; - abinfo.bytes = count / s->dma_adc.cnt_factor; - abinfo.fragstotal = s->dma_adc.numfrag; - abinfo.fragments = abinfo.bytes >> s->dma_adc.fragshift; - return copy_to_user((void *) arg, &abinfo, - sizeof(abinfo)) ? -EFAULT : 0; - - case SNDCTL_DSP_NONBLOCK: - file->f_flags |= O_NONBLOCK; - return 0; - - case SNDCTL_DSP_GETODELAY: - if (!(file->f_mode & FMODE_WRITE)) - return -EINVAL; - spin_lock_irqsave(&s->lock, flags); - count = s->dma_dac.count; - count -= dma_count_done(&s->dma_dac); - spin_unlock_irqrestore(&s->lock, flags); - if (count < 0) - count = 0; - count /= s->dma_dac.cnt_factor; - return put_user(count, (int *) arg); - - case SNDCTL_DSP_GETIPTR: - if (!(file->f_mode & FMODE_READ)) - return -EINVAL; - spin_lock_irqsave(&s->lock, flags); - cinfo.bytes = s->dma_adc.total_bytes; - count = s->dma_adc.count; - if (!s->dma_adc.stopped) { - diff = dma_count_done(&s->dma_adc); - count += diff; - cinfo.bytes += diff; - cinfo.ptr = virt_to_phys(s->dma_adc.nextIn) + diff - - s->dma_adc.dmaaddr; - } else - cinfo.ptr = virt_to_phys(s->dma_adc.nextIn) - - s->dma_adc.dmaaddr; - if (s->dma_adc.mapped) - s->dma_adc.count &= (s->dma_adc.dma_fragsize-1); - spin_unlock_irqrestore(&s->lock, flags); - if (count < 0) - count = 0; - cinfo.blocks = count >> s->dma_adc.fragshift; - return copy_to_user((void *) arg, &cinfo, sizeof(cinfo)) ? -EFAULT : 0; - - case SNDCTL_DSP_GETOPTR: - if (!(file->f_mode & FMODE_READ)) - return -EINVAL; - spin_lock_irqsave(&s->lock, flags); - cinfo.bytes = s->dma_dac.total_bytes; - count = s->dma_dac.count; - if (!s->dma_dac.stopped) { - diff = dma_count_done(&s->dma_dac); - count -= diff; - cinfo.bytes += diff; - cinfo.ptr = virt_to_phys(s->dma_dac.nextOut) + diff - - s->dma_dac.dmaaddr; - } else - cinfo.ptr = virt_to_phys(s->dma_dac.nextOut) - - s->dma_dac.dmaaddr; - if (s->dma_dac.mapped) - s->dma_dac.count &= (s->dma_dac.dma_fragsize-1); - spin_unlock_irqrestore(&s->lock, flags); - if (count < 0) - count = 0; - cinfo.blocks = count >> s->dma_dac.fragshift; - return copy_to_user((void *) arg, &cinfo, sizeof(cinfo)) ? -EFAULT : 0; - - case SNDCTL_DSP_GETBLKSIZE: - if (file->f_mode & FMODE_WRITE) - return put_user(s->dma_dac.fragsize, (int *) arg); - else - return put_user(s->dma_adc.fragsize, (int *) arg); - - case SNDCTL_DSP_SETFRAGMENT: - if (get_user(val, (int *) arg)) - return -EFAULT; - if (file->f_mode & FMODE_READ) { - stop_adc(s); - s->dma_adc.ossfragshift = val & 0xffff; - s->dma_adc.ossmaxfrags = (val >> 16) & 0xffff; - if (s->dma_adc.ossfragshift < 4) - s->dma_adc.ossfragshift = 4; - if (s->dma_adc.ossfragshift > 15) - s->dma_adc.ossfragshift = 15; - if (s->dma_adc.ossmaxfrags < 4) - s->dma_adc.ossmaxfrags = 4; - if ((ret = prog_dmabuf_adc(s))) - return ret; - } - if (file->f_mode & FMODE_WRITE) { - stop_dac(s); - s->dma_dac.ossfragshift = val & 0xffff; - s->dma_dac.ossmaxfrags = (val >> 16) & 0xffff; - if (s->dma_dac.ossfragshift < 4) - s->dma_dac.ossfragshift = 4; - if (s->dma_dac.ossfragshift > 15) - s->dma_dac.ossfragshift = 15; - if (s->dma_dac.ossmaxfrags < 4) - s->dma_dac.ossmaxfrags = 4; - if ((ret = prog_dmabuf_dac(s))) - return ret; - } - return 0; - - case SNDCTL_DSP_SUBDIVIDE: - if ((file->f_mode & FMODE_READ && s->dma_adc.subdivision) || - (file->f_mode & FMODE_WRITE && s->dma_dac.subdivision)) - return -EINVAL; - if (get_user(val, (int *) arg)) - return -EFAULT; - if (val != 1 && val != 2 && val != 4) - return -EINVAL; - if (file->f_mode & FMODE_READ) { - stop_adc(s); - s->dma_adc.subdivision = val; - if ((ret = prog_dmabuf_adc(s))) - return ret; - } - if (file->f_mode & FMODE_WRITE) { - stop_dac(s); - s->dma_dac.subdivision = val; - if ((ret = prog_dmabuf_dac(s))) - return ret; - } - return 0; - - case SOUND_PCM_READ_RATE: - return put_user((file->f_mode & FMODE_READ) ? - s->dma_adc.sample_rate : - s->dma_dac.sample_rate, - (int *)arg); - - case SOUND_PCM_READ_CHANNELS: - if (file->f_mode & FMODE_READ) - return put_user(s->dma_adc.num_channels, (int *)arg); - else - return put_user(s->dma_dac.num_channels, (int *)arg); - - case SOUND_PCM_READ_BITS: - if (file->f_mode & FMODE_READ) - return put_user(s->dma_adc.sample_size, (int *)arg); - else - return put_user(s->dma_dac.sample_size, (int *)arg); - - case SOUND_PCM_WRITE_FILTER: - case SNDCTL_DSP_SETSYNCRO: - case SOUND_PCM_READ_FILTER: - return -EINVAL; - } - - return mixdev_ioctl(&s->codec, cmd, arg); -} - - -static int au1000_open(struct inode *inode, struct file *file) -{ - int minor = iminor(inode); - DECLARE_WAITQUEUE(wait, current); - struct au1000_state *s = &au1000_state; - int ret; - -#ifdef AU1000_VERBOSE_DEBUG - if (file->f_flags & O_NONBLOCK) - dbg("%s: non-blocking", __FUNCTION__); - else - dbg("%s: blocking", __FUNCTION__); -#endif - - file->private_data = s; - /* wait for device to become free */ - mutex_lock(&s->open_mutex); - while (s->open_mode & file->f_mode) { - if (file->f_flags & O_NONBLOCK) { - mutex_unlock(&s->open_mutex); - return -EBUSY; - } - add_wait_queue(&s->open_wait, &wait); - __set_current_state(TASK_INTERRUPTIBLE); - mutex_unlock(&s->open_mutex); - schedule(); - remove_wait_queue(&s->open_wait, &wait); - set_current_state(TASK_RUNNING); - if (signal_pending(current)) - return -ERESTARTSYS; - mutex_lock(&s->open_mutex); - } - - stop_dac(s); - stop_adc(s); - - if (file->f_mode & FMODE_READ) { - s->dma_adc.ossfragshift = s->dma_adc.ossmaxfrags = - s->dma_adc.subdivision = s->dma_adc.total_bytes = 0; - s->dma_adc.num_channels = 1; - s->dma_adc.sample_size = 8; - set_adc_rate(s, 8000); - if ((minor & 0xf) == SND_DEV_DSP16) - s->dma_adc.sample_size = 16; - } - - if (file->f_mode & FMODE_WRITE) { - s->dma_dac.ossfragshift = s->dma_dac.ossmaxfrags = - s->dma_dac.subdivision = s->dma_dac.total_bytes = 0; - s->dma_dac.num_channels = 1; - s->dma_dac.sample_size = 8; - set_dac_rate(s, 8000); - if ((minor & 0xf) == SND_DEV_DSP16) - s->dma_dac.sample_size = 16; - } - - if (file->f_mode & FMODE_READ) { - if ((ret = prog_dmabuf_adc(s))) - return ret; - } - if (file->f_mode & FMODE_WRITE) { - if ((ret = prog_dmabuf_dac(s))) - return ret; - } - - s->open_mode |= file->f_mode & (FMODE_READ | FMODE_WRITE); - mutex_unlock(&s->open_mutex); - mutex_init(&s->sem); - return nonseekable_open(inode, file); -} - -static int au1000_release(struct inode *inode, struct file *file) -{ - struct au1000_state *s = (struct au1000_state *)file->private_data; - - lock_kernel(); - - if (file->f_mode & FMODE_WRITE) { - unlock_kernel(); - drain_dac(s, file->f_flags & O_NONBLOCK); - lock_kernel(); - } - - mutex_lock(&s->open_mutex); - if (file->f_mode & FMODE_WRITE) { - stop_dac(s); - dealloc_dmabuf(s, &s->dma_dac); - } - if (file->f_mode & FMODE_READ) { - stop_adc(s); - dealloc_dmabuf(s, &s->dma_adc); - } - s->open_mode &= ((~file->f_mode) & (FMODE_READ|FMODE_WRITE)); - mutex_unlock(&s->open_mutex); - wake_up(&s->open_wait); - unlock_kernel(); - return 0; -} - -static /*const */ struct file_operations au1000_audio_fops = { - .owner = THIS_MODULE, - .llseek = au1000_llseek, - .read = au1000_read, - .write = au1000_write, - .poll = au1000_poll, - .ioctl = au1000_ioctl, - .mmap = au1000_mmap, - .open = au1000_open, - .release = au1000_release, -}; - - -/* --------------------------------------------------------------------- */ - - -/* --------------------------------------------------------------------- */ - -/* - * for debugging purposes, we'll create a proc device that dumps the - * CODEC chipstate - */ - -#ifdef AU1000_DEBUG -static int proc_au1000_dump(char *buf, char **start, off_t fpos, - int length, int *eof, void *data) -{ - struct au1000_state *s = &au1000_state; - int cnt, len = 0; - - /* print out header */ - len += sprintf(buf + len, "\n\t\tAU1000 Audio Debug\n\n"); - - // print out digital controller state - len += sprintf(buf + len, "AU1000 Audio Controller registers\n"); - len += sprintf(buf + len, "---------------------------------\n"); - len += sprintf (buf + len, "AC97C_CONFIG = %08x\n", - au_readl(AC97C_CONFIG)); - len += sprintf (buf + len, "AC97C_STATUS = %08x\n", - au_readl(AC97C_STATUS)); - len += sprintf (buf + len, "AC97C_CNTRL = %08x\n", - au_readl(AC97C_CNTRL)); - - /* print out CODEC state */ - len += sprintf(buf + len, "\nAC97 CODEC registers\n"); - len += sprintf(buf + len, "----------------------\n"); - for (cnt = 0; cnt <= 0x7e; cnt += 2) - len += sprintf(buf + len, "reg %02x = %04x\n", - cnt, rdcodec(&s->codec, cnt)); - - if (fpos >= len) { - *start = buf; - *eof = 1; - return 0; - } - *start = buf + fpos; - if ((len -= fpos) > length) - return length; - *eof = 1; - return len; - -} -#endif /* AU1000_DEBUG */ - -/* --------------------------------------------------------------------- */ - -MODULE_AUTHOR("Monta Vista Software, stevel@mvista.com"); -MODULE_DESCRIPTION("Au1000 Audio Driver"); - -/* --------------------------------------------------------------------- */ - -static int __devinit au1000_probe(void) -{ - struct au1000_state *s = &au1000_state; - int val; -#ifdef AU1000_DEBUG - char proc_str[80]; -#endif - - memset(s, 0, sizeof(struct au1000_state)); - - init_waitqueue_head(&s->dma_adc.wait); - init_waitqueue_head(&s->dma_dac.wait); - init_waitqueue_head(&s->open_wait); - mutex_init(&s->open_mutex); - spin_lock_init(&s->lock); - s->codec.private_data = s; - s->codec.id = 0; - s->codec.codec_read = rdcodec; - s->codec.codec_write = wrcodec; - s->codec.codec_wait = waitcodec; - - if (!request_mem_region(CPHYSADDR(AC97C_CONFIG), - 0x14, AU1000_MODULE_NAME)) { - err("AC'97 ports in use"); - return -1; - } - // Allocate the DMA Channels - if ((s->dma_dac.dmanr = request_au1000_dma(DMA_ID_AC97C_TX, - "audio DAC", - dac_dma_interrupt, - IRQF_DISABLED, s)) < 0) { - err("Can't get DAC DMA"); - goto err_dma1; - } - if ((s->dma_adc.dmanr = request_au1000_dma(DMA_ID_AC97C_RX, - "audio ADC", - adc_dma_interrupt, - IRQF_DISABLED, s)) < 0) { - err("Can't get ADC DMA"); - goto err_dma2; - } - - info("DAC: DMA%d/IRQ%d, ADC: DMA%d/IRQ%d", - s->dma_dac.dmanr, get_dma_done_irq(s->dma_dac.dmanr), - s->dma_adc.dmanr, get_dma_done_irq(s->dma_adc.dmanr)); - - // enable DMA coherency in read/write DMA channels - set_dma_mode(s->dma_dac.dmanr, - get_dma_mode(s->dma_dac.dmanr) & ~DMA_NC); - set_dma_mode(s->dma_adc.dmanr, - get_dma_mode(s->dma_adc.dmanr) & ~DMA_NC); - - /* register devices */ - - if ((s->dev_audio = register_sound_dsp(&au1000_audio_fops, -1)) < 0) - goto err_dev1; - if ((s->codec.dev_mixer = - register_sound_mixer(&au1000_mixer_fops, -1)) < 0) - goto err_dev2; - -#ifdef AU1000_DEBUG - /* intialize the debug proc device */ - s->ps = create_proc_read_entry(AU1000_MODULE_NAME, 0, NULL, - proc_au1000_dump, NULL); -#endif /* AU1000_DEBUG */ - - // configure pins for AC'97 - au_writel(au_readl(SYS_PINFUNC) & ~0x02, SYS_PINFUNC); - - // Assert reset for 10msec to the AC'97 controller, and enable clock - au_writel(AC97C_RS | AC97C_CE, AC97C_CNTRL); - au1000_delay(10); - au_writel(AC97C_CE, AC97C_CNTRL); - au1000_delay(10); // wait for clock to stabilize - - /* cold reset the AC'97 */ - au_writel(AC97C_RESET, AC97C_CONFIG); - au1000_delay(10); - au_writel(0, AC97C_CONFIG); - /* need to delay around 500msec(bleech) to give - some CODECs enough time to wakeup */ - au1000_delay(500); - - /* warm reset the AC'97 to start the bitclk */ - au_writel(AC97C_SG | AC97C_SYNC, AC97C_CONFIG); - udelay(100); - au_writel(0, AC97C_CONFIG); - - /* codec init */ - if (!ac97_probe_codec(&s->codec)) - goto err_dev3; - - s->codec_base_caps = rdcodec(&s->codec, AC97_RESET); - s->codec_ext_caps = rdcodec(&s->codec, AC97_EXTENDED_ID); - info("AC'97 Base/Extended ID = %04x/%04x", - s->codec_base_caps, s->codec_ext_caps); - - /* - * On the Pb1000, audio playback is on the AUX_OUT - * channel (which defaults to LNLVL_OUT in AC'97 - * rev 2.2) so make sure this channel is listed - * as supported (soundcard.h calls this channel - * ALTPCM). ac97_codec.c does not handle detection - * of this channel correctly. - */ - s->codec.supported_mixers |= SOUND_MASK_ALTPCM; - /* - * Now set AUX_OUT's default volume. - */ - val = 0x4343; - mixdev_ioctl(&s->codec, SOUND_MIXER_WRITE_ALTPCM, - (unsigned long) &val); - - if (!(s->codec_ext_caps & AC97_EXTID_VRA)) { - // codec does not support VRA - s->no_vra = 1; - } else if (!vra) { - // Boot option says disable VRA - u16 ac97_extstat = rdcodec(&s->codec, AC97_EXTENDED_STATUS); - wrcodec(&s->codec, AC97_EXTENDED_STATUS, - ac97_extstat & ~AC97_EXTSTAT_VRA); - s->no_vra = 1; - } - if (s->no_vra) - info("no VRA, interpolating and decimating"); - - /* set mic to be the recording source */ - val = SOUND_MASK_MIC; - mixdev_ioctl(&s->codec, SOUND_MIXER_WRITE_RECSRC, - (unsigned long) &val); - -#ifdef AU1000_DEBUG - sprintf(proc_str, "driver/%s/%d/ac97", AU1000_MODULE_NAME, - s->codec.id); - s->ac97_ps = create_proc_read_entry (proc_str, 0, NULL, - ac97_read_proc, &s->codec); -#endif - -#ifdef CONFIG_MIPS_XXS1500 - /* deassert eapd */ - wrcodec(&s->codec, AC97_POWER_CONTROL, - rdcodec(&s->codec, AC97_POWER_CONTROL) & ~0x8000); - /* mute a number of signals which seem to be causing problems - * if not muted. - */ - wrcodec(&s->codec, AC97_PCBEEP_VOL, 0x8000); - wrcodec(&s->codec, AC97_PHONE_VOL, 0x8008); - wrcodec(&s->codec, AC97_MIC_VOL, 0x8008); - wrcodec(&s->codec, AC97_LINEIN_VOL, 0x8808); - wrcodec(&s->codec, AC97_CD_VOL, 0x8808); - wrcodec(&s->codec, AC97_VIDEO_VOL, 0x8808); - wrcodec(&s->codec, AC97_AUX_VOL, 0x8808); - wrcodec(&s->codec, AC97_PCMOUT_VOL, 0x0808); - wrcodec(&s->codec, AC97_GENERAL_PURPOSE, 0x2000); -#endif - - return 0; - - err_dev3: - unregister_sound_mixer(s->codec.dev_mixer); - err_dev2: - unregister_sound_dsp(s->dev_audio); - err_dev1: - free_au1000_dma(s->dma_adc.dmanr); - err_dma2: - free_au1000_dma(s->dma_dac.dmanr); - err_dma1: - release_mem_region(CPHYSADDR(AC97C_CONFIG), 0x14); - return -1; -} - -static void au1000_remove(void) -{ - struct au1000_state *s = &au1000_state; - - if (!s) - return; -#ifdef AU1000_DEBUG - if (s->ps) - remove_proc_entry(AU1000_MODULE_NAME, NULL); -#endif /* AU1000_DEBUG */ - synchronize_irq(); - free_au1000_dma(s->dma_adc.dmanr); - free_au1000_dma(s->dma_dac.dmanr); - release_mem_region(CPHYSADDR(AC97C_CONFIG), 0x14); - unregister_sound_dsp(s->dev_audio); - unregister_sound_mixer(s->codec.dev_mixer); -} - -static int __init init_au1000(void) -{ - info("stevel@mvista.com, built " __TIME__ " on " __DATE__); - return au1000_probe(); -} - -static void __exit cleanup_au1000(void) -{ - info("unloading"); - au1000_remove(); -} - -module_init(init_au1000); -module_exit(cleanup_au1000); - -/* --------------------------------------------------------------------- */ - -#ifndef MODULE - -static int __init au1000_setup(char *options) -{ - char *this_opt; - - if (!options || !*options) - return 0; - - while ((this_opt = strsep(&options, ","))) { - if (!*this_opt) - continue; - if (!strncmp(this_opt, "vra", 3)) { - vra = 1; - } - } - - return 1; -} - -__setup("au1000_audio=", au1000_setup); - -#endif /* MODULE */ |