hal2.c
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:37k
- /*
- * Driver for HAL2 sound processors
- * Copyright (c) 2001, 2002 Ladislav Michl <ladis@psi.cz>
- *
- * Based on Ulf Carlsson's code.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- * Supported devices:
- * /dev/dsp standard dsp device, (mostly) OSS compatible
- * /dev/mixer standard mixer device, (mostly) OSS compatible
- *
- * BUGS:
- * + Driver currently supports indigo mode only.
- * + Recording doesn't work. I guess that it is caused by PBUS channel
- * misconfiguration, but until I get relevant info I'm unable to fix it.
- */
- #include <linux/module.h>
- #include <linux/sched.h>
- #include <linux/init.h>
- #include <linux/slab.h>
- #include <linux/poll.h>
- #include <linux/sound.h>
- #include <linux/soundcard.h>
- #include <asm/io.h>
- #include <asm/uaccess.h>
- #include <asm/sgi/sgint23.h>
- #include "hal2.h"
- #if 0
- #define DEBUG(args...) printk(args)
- #else
- #define DEBUG(args...)
- #endif
- #if 0
- #define DEBUG_MIX(args...) printk(args)
- #else
- #define DEBUG_MIX(args...)
- #endif
- #define H2_INDIRECT_WAIT(regs) while (regs->isr & H2_ISR_TSTATUS);
- #define H2_READ_ADDR(addr) (addr | (1<<7))
- #define H2_WRITE_ADDR(addr) (addr)
- static char *hal2str = "HAL2 audio";
- static int ibuffers = 32;
- static int obuffers = 32;
- /* I doubt anyone has a machine with two HAL2 cards. It's possible to
- * have two HPC's, so it is probably possible to have two HAL2 cards.
- * Try to deal with it, but note that it is not tested.
- */
- #define MAXCARDS 2
- static hal2_card_t* hal2_card[MAXCARDS];
- static const struct {
- unsigned char idx:4, avail:1;
- } mixtable[SOUND_MIXER_NRDEVICES] = {
- [SOUND_MIXER_PCM] = { H2_MIX_OUTPUT_ATT, 1 }, /* voice */
- [SOUND_MIXER_MIC] = { H2_MIX_INPUT_GAIN, 1 }, /* mic */
- };
- #define H2_SUPPORTED_FORMATS (AFMT_S16_LE | AFMT_S16_BE)
- static inline void hal2_isr_write(hal2_card_t *hal2, u32 val)
- {
- hal2->ctl_regs->isr = val;
- }
- static inline u32 hal2_isr_look(hal2_card_t *hal2)
- {
- return hal2->ctl_regs->isr;
- }
- static inline u32 hal2_rev_look(hal2_card_t *hal2)
- {
- return hal2->ctl_regs->rev;
- }
- #if 0
- static u16 hal2_i_look16(hal2_card_t *hal2, u32 addr)
- {
- hal2_ctl_regs_t *regs = hal2->ctl_regs;
- regs->iar = H2_READ_ADDR(addr);
- H2_INDIRECT_WAIT(regs);
- return (regs->idr0 & 0xffff);
- }
- #endif
- static u32 hal2_i_look32(hal2_card_t *hal2, u32 addr)
- {
- u32 ret;
- hal2_ctl_regs_t *regs = hal2->ctl_regs;
- regs->iar = H2_READ_ADDR(addr);
- H2_INDIRECT_WAIT(regs);
- ret = regs->idr0 & 0xffff;
- regs->iar = H2_READ_ADDR(addr | 0x1);
- H2_INDIRECT_WAIT(regs);
- ret |= (regs->idr0 & 0xffff) << 16;
- return ret;
- }
- static void hal2_i_write16(hal2_card_t *hal2, u32 addr, u16 val)
- {
- hal2_ctl_regs_t *regs = hal2->ctl_regs;
- regs->idr0 = val;
- regs->idr1 = 0;
- regs->idr2 = 0;
- regs->idr3 = 0;
- regs->iar = H2_WRITE_ADDR(addr);
- H2_INDIRECT_WAIT(regs);
- }
- static void hal2_i_write32(hal2_card_t *hal2, u32 addr, u32 val)
- {
- hal2_ctl_regs_t *regs = hal2->ctl_regs;
- regs->idr0 = val & 0xffff;
- regs->idr1 = val >> 16;
- regs->idr2 = 0;
- regs->idr3 = 0;
- regs->iar = H2_WRITE_ADDR(addr);
- H2_INDIRECT_WAIT(regs);
- }
- static void hal2_i_setbit16(hal2_card_t *hal2, u32 addr, u16 bit)
- {
- hal2_ctl_regs_t *regs = hal2->ctl_regs;
- regs->iar = H2_READ_ADDR(addr);
- H2_INDIRECT_WAIT(regs);
- regs->idr0 = regs->idr0 | bit;
- regs->idr1 = 0;
- regs->idr2 = 0;
- regs->idr3 = 0;
- regs->iar = H2_WRITE_ADDR(addr);
- H2_INDIRECT_WAIT(regs);
- }
- static void hal2_i_setbit32(hal2_card_t *hal2, u32 addr, u32 bit)
- {
- u32 tmp;
- hal2_ctl_regs_t *regs = hal2->ctl_regs;
- regs->iar = H2_READ_ADDR(addr);
- H2_INDIRECT_WAIT(regs);
- tmp = regs->idr0 | (regs->idr1 << 16) | bit;
- regs->idr0 = tmp & 0xffff;
- regs->idr1 = tmp >> 16;
- regs->idr2 = 0;
- regs->idr3 = 0;
- regs->iar = H2_WRITE_ADDR(addr);
- H2_INDIRECT_WAIT(regs);
- }
- static void hal2_i_clearbit16(hal2_card_t *hal2, u32 addr, u16 bit)
- {
- hal2_ctl_regs_t *regs = hal2->ctl_regs;
- regs->iar = H2_READ_ADDR(addr);
- H2_INDIRECT_WAIT(regs);
- regs->idr0 = regs->idr0 & ~bit;
- regs->idr1 = 0;
- regs->idr2 = 0;
- regs->idr3 = 0;
- regs->iar = H2_WRITE_ADDR(addr);
- H2_INDIRECT_WAIT(regs);
- }
- #if 0
- static void hal2_i_clearbit32(hal2_card_t *hal2, u32 addr, u32 bit)
- {
- u32 tmp;
- hal2_ctl_regs_t *regs = hal2->ctl_regs;
- regs->iar = H2_READ_ADDR(addr);
- H2_INDIRECT_WAIT(regs);
- tmp = (regs->idr0 | (regs->idr1 << 16)) & ~bit;
- regs->idr0 = tmp & 0xffff;
- regs->idr1 = tmp >> 16;
- regs->idr2 = 0;
- regs->idr3 = 0;
- regs->iar = H2_WRITE_ADDR(addr);
- H2_INDIRECT_WAIT(regs);
- }
- #endif
- #ifdef HAL2_DEBUG
- static void hal2_dump_regs(hal2_card_t *hal2)
- {
- printk("isr: %08hx ", hal2_isr_look(hal2));
- printk("rev: %08hxn", hal2_rev_look(hal2));
- printk("relay: %04hxn", hal2_i_look16(hal2, H2I_RELAY_C));
- printk("port en: %04hx ", hal2_i_look16(hal2, H2I_DMA_PORT_EN));
- printk("dma end: %04hx ", hal2_i_look16(hal2, H2I_DMA_END));
- printk("dma drv: %04hxn", hal2_i_look16(hal2, H2I_DMA_DRV));
- printk("syn ctl: %04hx ", hal2_i_look16(hal2, H2I_SYNTH_C));
- printk("aesrx ctl: %04hx ", hal2_i_look16(hal2, H2I_AESRX_C));
- printk("aestx ctl: %04hx ", hal2_i_look16(hal2, H2I_AESTX_C));
- printk("dac ctl1: %04hx ", hal2_i_look16(hal2, H2I_ADC_C1));
- printk("dac ctl2: %08lx ", hal2_i_look32(hal2, H2I_ADC_C2));
- printk("adc ctl1: %04hx ", hal2_i_look16(hal2, H2I_DAC_C1));
- printk("adc ctl2: %08lx ", hal2_i_look32(hal2, H2I_DAC_C2));
- printk("syn map: %04hxn", hal2_i_look16(hal2, H2I_SYNTH_MAP_C));
- printk("bres1 ctl1: %04hx ", hal2_i_look16(hal2, H2I_BRES1_C1));
- printk("bres1 ctl2: %04lx ", hal2_i_look32(hal2, H2I_BRES1_C2));
- printk("bres2 ctl1: %04hx ", hal2_i_look16(hal2, H2I_BRES2_C1));
- printk("bres2 ctl2: %04lx ", hal2_i_look32(hal2, H2I_BRES2_C2));
- printk("bres3 ctl1: %04hx ", hal2_i_look16(hal2, H2I_BRES3_C1));
- printk("bres3 ctl2: %04lxn", hal2_i_look32(hal2, H2I_BRES3_C2));
- }
- #endif
- static hal2_card_t* hal2_dsp_find_card(int minor)
- {
- int i;
- for (i = 0; i < MAXCARDS; i++)
- if (hal2_card[i] != NULL && hal2_card[i]->dev_dsp == minor)
- return hal2_card[i];
- return NULL;
- }
- static hal2_card_t* hal2_mixer_find_card(int minor)
- {
- int i;
- for (i = 0; i < MAXCARDS; i++)
- if (hal2_card[i] != NULL && hal2_card[i]->dev_mixer == minor)
- return hal2_card[i];
- return NULL;
- }
- static void hal2_dac_interrupt(hal2_codec_t *dac)
- {
- int running;
- spin_lock(&dac->lock);
-
- /* if tail buffer contains zero samples DMA stream was already
- * stopped */
- running = dac->tail->info.cnt;
- dac->tail->info.cnt = 0;
- dac->tail->info.desc.cntinfo = HPCDMA_XIE | HPCDMA_EOX;
- dma_cache_wback_inv((unsigned long) dac->tail,
- sizeof(struct hpc_dma_desc));
- /* we just proccessed empty buffer, don't update tail pointer */
- if (running)
- dac->tail = dac->tail->info.next;
- spin_unlock(&dac->lock);
- wake_up(&dac->dma_wait);
- }
- static void hal2_adc_interrupt(hal2_codec_t *adc)
- {
- int running;
-
- spin_lock(&adc->lock);
- /* if head buffer contains nonzero samples DMA stream was already
- * stopped */
- running = !adc->head->info.cnt;
- adc->head->info.cnt = H2_BUFFER_SIZE;
- adc->head->info.desc.cntinfo = HPCDMA_XIE | HPCDMA_EOX;
- dma_cache_wback_inv((unsigned long) adc->head,
- sizeof(struct hpc_dma_desc));
- /* we just proccessed empty buffer, don't update head pointer */
- if (running) {
- dma_cache_inv((unsigned long) adc->head->data, H2_BUFFER_SIZE);
- adc->head = adc->head->info.next;
- }
- spin_unlock(&adc->lock);
- wake_up(&adc->dma_wait);
- }
- static void hal2_interrupt(int irq, void *dev_id, struct pt_regs *regs)
- {
- hal2_card_t *hal2 = (hal2_card_t*)dev_id;
- /* decide what caused this interrupt */
- if (hal2->dac.pbus.pbus->pbdma_ctrl & HPC3_PDMACTRL_INT)
- hal2_dac_interrupt(&hal2->dac);
- if (hal2->adc.pbus.pbus->pbdma_ctrl & HPC3_PDMACTRL_INT)
- hal2_adc_interrupt(&hal2->adc);
- }
- static int hal2_compute_rate(hal2_codec_t *codec, unsigned int rate)
- {
- unsigned short inc;
-
- /* We default to 44.1 kHz and if it isn't possible to fall back to
- * 48.0 kHz with the needed adjustments of real_rate.
- */
- DEBUG("rate: %dn", rate);
-
- /* Refer to CS4216 data sheet */
- if (rate < 4000)
- rate = 4000;
- if (rate > 50000)
- rate = 50000;
- /* Note: This is NOT the way they set up the bresenham clock generators
- * in the specification. I've tried to implement that method but it
- * doesn't work. It's probably another silly bug in the spec.
- *
- * I accidently discovered this method while I was testing and it seems
- * to work very well with all frequencies, and thee shall follow rule #1
- * of programming :-)
- */
-
- if (44100 % rate == 0) {
- inc = 44100 / rate;
- if (inc < 1) inc = 1;
- codec->master = 44100;
- } else {
- inc = 48000 / rate;
- if (inc < 1) inc = 1;
- rate = 48000 / inc;
- codec->master = 48000;
- }
- codec->inc = inc;
- codec->mod = 1;
-
- DEBUG("real_rate: %dn", rate);
- return rate;
- }
- static void hal2_set_dac_rate(hal2_card_t *hal2)
- {
- unsigned int master = hal2->dac.master;
- int inc = hal2->dac.inc;
- int mod = hal2->dac.mod;
- DEBUG("master: %d inc: %d mod: %dn", master, inc, mod);
-
- hal2_i_write16(hal2, H2I_BRES1_C1, (master == 44100) ? 1 : 0);
- hal2_i_write32(hal2, H2I_BRES1_C2, ((0xffff & (mod - inc - 1)) << 16) | 1);
- }
- static void hal2_set_adc_rate(hal2_card_t *hal2)
- {
- unsigned int master = hal2->adc.master;
- int inc = hal2->adc.inc;
- int mod = hal2->adc.mod;
- DEBUG("master: %d inc: %d mod: %dn", master, inc, mod);
-
- hal2_i_write16(hal2, H2I_BRES2_C1, (master == 44100) ? 1 : 0);
- hal2_i_write32(hal2, H2I_BRES2_C2, ((0xffff & (mod - inc - 1)) << 16) | 1);
- }
- static void hal2_setup_dac(hal2_card_t *hal2)
- {
- unsigned int fifobeg, fifoend, highwater, sample_size;
- hal2_pbus_t *pbus = &hal2->dac.pbus;
- DEBUG("hal2_setup_dacn");
-
- /* Now we set up some PBUS information. The PBUS needs information about
- * what portion of the fifo it will use. If it's receiving or
- * transmitting, and finally whether the stream is little endian or big
- * endian. The information is written later, on the start call.
- */
- sample_size = 2 * hal2->dac.voices;
- /* Fifo should be set to hold exactly four samples. Highwater mark
- * should be set to two samples. */
- highwater = (sample_size * 2) >> 1; /* halfwords */
- fifobeg = 0; /* playback is first */
- fifoend = (sample_size * 4) >> 3; /* doublewords */
- pbus->ctrl = HPC3_PDMACTRL_RT | HPC3_PDMACTRL_LD |
- (highwater << 8) | (fifobeg << 16) | (fifoend << 24);
- /* We disable everything before we do anything at all */
- pbus->pbus->pbdma_ctrl = HPC3_PDMACTRL_LD;
- hal2_i_clearbit16(hal2, H2I_DMA_PORT_EN, H2I_DMA_PORT_EN_CODECTX);
- hal2_i_clearbit16(hal2, H2I_DMA_DRV, (1 << pbus->pbusnr));
- /* Setup the HAL2 for playback */
- hal2_set_dac_rate(hal2);
- /* We are using 1st Bresenham clock generator for playback */
- hal2_i_write16(hal2, H2I_DAC_C1, (pbus->pbusnr << H2I_C1_DMA_SHIFT)
- | (1 << H2I_C1_CLKID_SHIFT)
- | (hal2->dac.voices << H2I_C1_DATAT_SHIFT));
- }
- static void hal2_setup_adc(hal2_card_t *hal2)
- {
- unsigned int fifobeg, fifoend, highwater, sample_size;
- hal2_pbus_t *pbus = &hal2->adc.pbus;
- DEBUG("hal2_setup_adcn");
-
- sample_size = 2 * hal2->adc.voices;
- highwater = (sample_size * 2) >> 1; /* halfwords */
- fifobeg = (4 * 4) >> 3; /* record is second */
- fifoend = (4 * 4 + sample_size * 4) >> 3; /* doublewords */
- pbus->ctrl = HPC3_PDMACTRL_RT | HPC3_PDMACTRL_RCV | HPC3_PDMACTRL_LD |
- (highwater << 8) | (fifobeg << 16) | (fifoend << 24);
- pbus->pbus->pbdma_ctrl = HPC3_PDMACTRL_LD;
- hal2_i_clearbit16(hal2, H2I_DMA_PORT_EN, H2I_DMA_PORT_EN_CODECR);
- hal2_i_clearbit16(hal2, H2I_DMA_DRV, (1 << pbus->pbusnr));
- /* Setup the HAL2 for record */
- hal2_set_adc_rate(hal2);
- /* We are using 2nd Bresenham clock generator for record */
- hal2_i_write16(hal2, H2I_ADC_C1, (pbus->pbusnr << H2I_C1_DMA_SHIFT)
- | (2 << H2I_C1_CLKID_SHIFT)
- | (hal2->adc.voices << H2I_C1_DATAT_SHIFT));
- }
- static void hal2_start_dac(hal2_card_t *hal2)
- {
- hal2_pbus_t *pbus = &hal2->dac.pbus;
- DEBUG("hal2_start_dacn");
-
- pbus->pbus->pbdma_dptr = PHYSADDR(hal2->dac.tail);
- pbus->pbus->pbdma_ctrl = pbus->ctrl | HPC3_PDMACTRL_ACT;
- /* set endianess */
- if (hal2->dac.format & AFMT_S16_LE)
- hal2_i_setbit16(hal2, H2I_DMA_END, H2I_DMA_END_CODECTX);
- else
- hal2_i_clearbit16(hal2, H2I_DMA_END, H2I_DMA_END_CODECTX);
- /* set DMA bus */
- hal2_i_setbit16(hal2, H2I_DMA_DRV, (1 << pbus->pbusnr));
- /* enable DAC */
- hal2_i_setbit16(hal2, H2I_DMA_PORT_EN, H2I_DMA_PORT_EN_CODECTX);
- }
- static void hal2_start_adc(hal2_card_t *hal2)
- {
- hal2_pbus_t *pbus = &hal2->adc.pbus;
- DEBUG("hal2_start_adcn");
-
- pbus->pbus->pbdma_dptr = PHYSADDR(hal2->adc.head);
- pbus->pbus->pbdma_ctrl = pbus->ctrl | HPC3_PDMACTRL_ACT;
-
- /* set endianess */
- if (hal2->adc.format & AFMT_S16_LE)
- hal2_i_setbit16(hal2, H2I_DMA_END, H2I_DMA_END_CODECR);
- else
- hal2_i_clearbit16(hal2, H2I_DMA_END, H2I_DMA_END_CODECR);
- /* set DMA bus */
- hal2_i_setbit16(hal2, H2I_DMA_DRV, (1 << pbus->pbusnr));
- /* enable ADC */
- hal2_i_setbit16(hal2, H2I_DMA_PORT_EN, H2I_DMA_PORT_EN_CODECR);
- }
- static inline void hal2_stop_dac(hal2_card_t *hal2)
- {
- DEBUG("hal2_stop_dacn");
-
- hal2->dac.pbus.pbus->pbdma_ctrl = HPC3_PDMACTRL_LD;
- /* The HAL2 itself may remain enabled safely */
- }
- static inline void hal2_stop_adc(hal2_card_t *hal2)
- {
- DEBUG("hal2_stop_adcn");
-
- hal2->adc.pbus.pbus->pbdma_ctrl = HPC3_PDMACTRL_LD;
- }
- #define hal2_alloc_dac_dmabuf(hal2) hal2_alloc_dmabuf(hal2, 1)
- #define hal2_alloc_adc_dmabuf(hal2) hal2_alloc_dmabuf(hal2, 0)
- static int hal2_alloc_dmabuf(hal2_card_t *hal2, int is_dac)
- {
- int buffers, cntinfo;
- hal2_buf_t *buf, *prev;
- hal2_codec_t *codec;
- if (is_dac) {
- codec = &hal2->dac;
- buffers = obuffers;
- cntinfo = HPCDMA_XIE | HPCDMA_EOX;
- } else {
- codec = &hal2->adc;
- buffers = ibuffers;
- cntinfo = HPCDMA_XIE | H2_BUFFER_SIZE;
- }
-
- DEBUG("allocating %d DMA buffers.n", buffers);
-
- buf = (hal2_buf_t*) get_zeroed_page(GFP_KERNEL);
- if (!buf)
- return -ENOMEM;
- codec->head = buf;
- codec->tail = buf;
-
- while (--buffers) {
- buf->info.desc.pbuf = PHYSADDR(&buf->data);
- buf->info.desc.cntinfo = cntinfo;
- buf->info.cnt = 0;
- prev = buf;
- buf = (hal2_buf_t*) get_zeroed_page(GFP_KERNEL);
- if (!buf) {
- printk("HAL2: Not enough memory for DMA buffer.n");
- buf = codec->head;
- while (buf) {
- prev = buf;
- free_page((unsigned long) buf);
- buf = prev->info.next;
- }
- return -ENOMEM;
- }
- prev->info.next = buf;
- prev->info.desc.pnext = PHYSADDR(buf);
- /* The PBUS can prolly not read this stuff when it's in
- * the cache so we have to flush it back to main memory
- */
- dma_cache_wback_inv((unsigned long) prev, PAGE_SIZE);
- }
- buf->info.desc.pbuf = PHYSADDR(&buf->data);
- buf->info.desc.cntinfo = cntinfo;
- buf->info.cnt = 0;
- buf->info.next = codec->head;
- buf->info.desc.pnext = PHYSADDR(codec->head);
- dma_cache_wback_inv((unsigned long) buf, PAGE_SIZE);
-
- return 0;
- }
- #define hal2_free_dac_dmabuf(hal2) hal2_free_dmabuf(hal2, 1)
- #define hal2_free_adc_dmabuf(hal2) hal2_free_dmabuf(hal2, 0)
- static void hal2_free_dmabuf(hal2_card_t *hal2, int is_dac)
- {
- hal2_buf_t *buf, *next;
- hal2_codec_t *codec = (is_dac) ? &hal2->dac : &hal2->adc;
- if (!codec->head)
- return;
-
- buf = codec->head->info.next;
- codec->head->info.next = NULL;
- while (buf) {
- next = buf->info.next;
- free_page((unsigned long) buf);
- buf = next;
- }
- codec->head = codec->tail = NULL;
- }
- /*
- * Add 'count' bytes to 'buffer' from DMA ring buffers. Return number of
- * bytes added or -EFAULT if copy_from_user failed.
- */
- static int hal2_get_buffer(hal2_card_t *hal2, char *buffer, int count)
- {
- unsigned long flags;
- int size, ret = 0;
- hal2_codec_t *adc = &hal2->adc;
-
- spin_lock_irqsave(&adc->lock, flags);
-
- DEBUG("getting %d bytes ", count);
- /* enable DMA stream if there are no data */
- if (!(adc->pbus.pbus->pbdma_ctrl & HPC3_PDMACTRL_ISACT) &&
- adc->tail->info.cnt == 0)
- hal2_start_adc(hal2);
- DEBUG("... ");
- while (adc->tail->info.cnt > 0 && count > 0) {
- size = min(adc->tail->info.cnt, count);
- spin_unlock_irqrestore(&adc->lock, flags);
- if (copy_to_user(buffer, &adc->tail->data[H2_BUFFER_SIZE-size],
- size)) {
- ret = -EFAULT;
- goto out;
- }
- spin_lock_irqsave(&adc->lock, flags);
-
- adc->tail->info.cnt -= size;
- /* buffer is empty, update tail pointer */
- if (adc->tail->info.cnt == 0) {
- adc->tail->info.desc.cntinfo = HPCDMA_XIE |
- H2_BUFFER_SIZE;
- dma_cache_wback_inv((unsigned long) adc->tail,
- sizeof(struct hpc_dma_desc));
- adc->tail = adc->tail->info.next;
- /* enable DMA stream again if needed */
- if (!(adc->pbus.pbus->pbdma_ctrl & HPC3_PDMACTRL_ISACT))
- hal2_start_adc(hal2);
- }
- buffer += size;
- ret += size;
- count -= size;
- DEBUG("(%d) ", size);
- }
- spin_unlock_irqrestore(&adc->lock, flags);
- out:
- DEBUG("n");
-
- return ret;
- }
- /*
- * Add 'count' bytes from 'buffer' to DMA ring buffers. Return number of
- * bytes added or -EFAULT if copy_from_user failed.
- */
- static int hal2_add_buffer(hal2_card_t *hal2, char *buffer, int count)
- {
- unsigned long flags;
- int size, ret = 0;
- hal2_codec_t *dac = &hal2->dac;
-
- spin_lock_irqsave(&dac->lock, flags);
-
- DEBUG("adding %d bytes ", count);
- while (dac->head->info.cnt == 0 && count > 0) {
- size = min((int)H2_BUFFER_SIZE, count);
- spin_unlock_irqrestore(&dac->lock, flags);
-
- if (copy_from_user(dac->head->data, buffer, size)) {
- ret = -EFAULT;
- goto out;
- }
- spin_lock_irqsave(&dac->lock, flags);
- dac->head->info.desc.cntinfo = size | HPCDMA_XIE;
- dac->head->info.cnt = size;
- dma_cache_wback_inv((unsigned long) dac->head,
- size + PAGE_SIZE - H2_BUFFER_SIZE);
- buffer += size;
- ret += size;
- count -= size;
- dac->head = dac->head->info.next;
- DEBUG("(%d) ", size);
- }
- if (!(dac->pbus.pbus->pbdma_ctrl & HPC3_PDMACTRL_ISACT) && ret > 0)
- hal2_start_dac(hal2);
-
- spin_unlock_irqrestore(&dac->lock, flags);
- out:
- DEBUG("n");
-
- return ret;
- }
- #define hal2_reset_dac_pointer(hal2) hal2_reset_pointer(hal2, 1)
- #define hal2_reset_adc_pointer(hal2) hal2_reset_pointer(hal2, 0)
- static void hal2_reset_pointer(hal2_card_t *hal2, int is_dac)
- {
- hal2_codec_t *codec = (is_dac) ? &hal2->dac : &hal2->adc;
-
- DEBUG("hal2_reset_pointern");
- codec->tail = codec->head;
- do {
- codec->tail->info.desc.cntinfo = HPCDMA_XIE | (is_dac) ?
- HPCDMA_EOX : H2_BUFFER_SIZE;
- codec->tail->info.cnt = 0;
- dma_cache_wback_inv((unsigned long) codec->tail,
- sizeof(struct hpc_dma_desc));
- codec->tail = codec->tail->info.next;
- } while (codec->tail != codec->head);
- }
- static int hal2_sync_dac(hal2_card_t *hal2)
- {
- DECLARE_WAITQUEUE(wait, current);
- hal2_codec_t *dac = &hal2->dac;
- int ret = 0;
- signed long timeout = 1000 * H2_BUFFER_SIZE * 2 * dac->voices *
- HZ / dac->sample_rate / 900;
- down(&dac->sem);
-
- while (dac->pbus.pbus->pbdma_ctrl & HPC3_PDMACTRL_ISACT) {
- add_wait_queue(&dac->dma_wait, &wait);
- set_current_state(TASK_INTERRUPTIBLE);
- if (!schedule_timeout(timeout))
- /* We may get bogus timeout when system is
- * heavily loaded */
- if (dac->tail->info.cnt) {
- printk("HAL2: timeout...n");
- ret = -ETIME;
- }
- if (signal_pending(current))
- ret = -ERESTARTSYS;
- if (ret) {
- hal2_stop_dac(hal2);
- hal2_reset_dac_pointer(hal2);
- }
- remove_wait_queue(&dac->dma_wait, &wait);
- }
- up(&dac->sem);
-
- return ret;
- }
- static int hal2_write_mixer(hal2_card_t *hal2, int index, int vol)
- {
- unsigned int l, r;
- DEBUG_MIX("mixer %d writen", index);
-
- if (index >= SOUND_MIXER_NRDEVICES || !mixtable[index].avail)
- return -EINVAL;
- r = (vol >> 8) & 0xff;
- if (r > 100)
- r = 100;
- l = vol & 0xff;
- if (l > 100)
- l = 100;
-
- hal2->mixer.volume[mixtable[index].idx] = l | (r << 8);
- switch (mixtable[index].idx) {
- case H2_MIX_OUTPUT_ATT: {
- DEBUG_MIX("output attenuator %d,%dn", l, r);
- if (r | l) {
- unsigned int tmp = hal2_i_look32(hal2, H2I_DAC_C2);
-
- tmp &= ~(H2I_C2_L_ATT_M | H2I_C2_R_ATT_M | H2I_C2_MUTE);
- /* Attenuator has five bits */
- l = (31 * (100 - l) / 99);
- r = (31 * (100 - r) / 99);
-
- DEBUG_MIX("left: %d, right %dn", l, r);
- tmp |= (l << H2I_C2_L_ATT_SHIFT) & H2I_C2_L_ATT_M;
- tmp |= (r << H2I_C2_R_ATT_SHIFT) & H2I_C2_R_ATT_M;
- hal2_i_write32(hal2, H2I_DAC_C2, tmp);
- } else
- hal2_i_setbit32(hal2, H2I_DAC_C2, H2I_C2_MUTE);
- }
- case H2_MIX_INPUT_GAIN: {
- /* TODO */
- }
- }
- return 0;
- }
- static void hal2_init_mixer(hal2_card_t *hal2)
- {
- int i;
- for (i = 0; i < SOUND_MIXER_NRDEVICES; i++)
- hal2_write_mixer(hal2, i, 100 | (100 << 8));
-
- }
- static int hal2_mixer_ioctl(hal2_card_t *hal2, unsigned int cmd,
- unsigned long arg)
- {
- int val;
- if (cmd == SOUND_MIXER_INFO) {
- mixer_info info;
-
- strncpy(info.id, hal2str, sizeof(info.id));
- strncpy(info.name, hal2str, sizeof(info.name));
- info.modify_counter = hal2->mixer.modcnt;
- if (copy_to_user((void *)arg, &info, sizeof(info)))
- return -EFAULT;
- return 0;
- }
- if (cmd == SOUND_OLD_MIXER_INFO) {
- _old_mixer_info info;
-
- strncpy(info.id, hal2str, sizeof(info.id));
- strncpy(info.name, hal2str, sizeof(info.name));
- if (copy_to_user((void *)arg, &info, sizeof(info)))
- return -EFAULT;
- return 0;
- }
- if (cmd == OSS_GETVERSION)
- return put_user(SOUND_VERSION, (int *)arg);
- if (_IOC_TYPE(cmd) != 'M' || _IOC_SIZE(cmd) != sizeof(int))
- return -EINVAL;
- if (_IOC_DIR(cmd) == _IOC_READ) {
- switch (_IOC_NR(cmd)) {
- /* Give the current record source */
- case SOUND_MIXER_RECSRC:
- val = 0; /* FIXME */
- break;
- /* Give the supported mixers, all of them support stereo */
- case SOUND_MIXER_DEVMASK:
- case SOUND_MIXER_STEREODEVS: {
- int i;
-
- for (val = i = 0; i < SOUND_MIXER_NRDEVICES; i++)
- if (mixtable[i].avail)
- val |= 1 << i;
- break;
- }
- /* Arg contains a bit for each supported recording source */
- case SOUND_MIXER_RECMASK:
- val = 0;
- break;
- case SOUND_MIXER_CAPS:
- val = 0;
- break;
- /* Read a specific mixer */
- default: {
- int i = _IOC_NR(cmd);
-
- if (i >= SOUND_MIXER_NRDEVICES || !mixtable[i].avail)
- return -EINVAL;
- val = hal2->mixer.volume[mixtable[i].idx];
- break;
- }
- }
- return put_user(val, (int *)arg);
- }
-
- if (_IOC_DIR(cmd) != (_IOC_WRITE|_IOC_READ))
- return -EINVAL;
-
- hal2->mixer.modcnt++;
- if (get_user(val, (int *)arg))
- return -EFAULT;
- switch (_IOC_NR(cmd)) {
- /* Arg contains a bit for each recording source */
- case SOUND_MIXER_RECSRC:
- return 0; /* FIXME */
- default:
- return hal2_write_mixer(hal2, _IOC_NR(cmd), val);
- }
- return 0;
- }
- static int hal2_open_mixdev(struct inode *inode, struct file *file)
- {
- hal2_card_t *hal2 = hal2_mixer_find_card(MINOR(inode->i_rdev));
- if (hal2) {
- file->private_data = hal2;
- return 0;
- }
- return -ENODEV;
- }
- static int hal2_release_mixdev(struct inode *inode, struct file *file)
- {
- return 0;
- }
- static int hal2_ioctl_mixdev(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
- {
- return hal2_mixer_ioctl((hal2_card_t *)file->private_data, cmd, arg);
- }
- static int hal2_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
- {
- int val;
- hal2_card_t *hal2 = (hal2_card_t *) file->private_data;
- switch (cmd) {
- case OSS_GETVERSION:
- return put_user(SOUND_VERSION, (int *)arg);
-
- case SNDCTL_DSP_SYNC:
- if (file->f_mode & FMODE_WRITE)
- return hal2_sync_dac(hal2);
- return 0;
-
- case SNDCTL_DSP_SETDUPLEX:
- return 0;
- case SNDCTL_DSP_GETCAPS:
- return put_user(DSP_CAP_DUPLEX | DSP_CAP_MULTI, (int *)arg);
-
- case SNDCTL_DSP_RESET:
- if (file->f_mode & FMODE_READ) {
- hal2_stop_adc(hal2);
- hal2_reset_adc_pointer(hal2);
- }
- if (file->f_mode & FMODE_WRITE) {
- hal2_stop_dac(hal2);
- hal2_reset_dac_pointer(hal2);
- }
- return 0;
- case SNDCTL_DSP_SPEED:
- if (get_user(val, (int *)arg))
- return -EFAULT;
- if (file->f_mode & FMODE_READ) {
- hal2_stop_adc(hal2);
- val = hal2_compute_rate(&hal2->adc, val);
- hal2->adc.sample_rate = val;
- hal2_set_adc_rate(hal2);
- }
- if (file->f_mode & FMODE_WRITE) {
- hal2_stop_dac(hal2);
- val = hal2_compute_rate(&hal2->dac, val);
- hal2->dac.sample_rate = val;
- hal2_set_dac_rate(hal2);
- }
- return put_user(val, (int *)arg);
-
- case SNDCTL_DSP_STEREO:
- if (get_user(val, (int *)arg))
- return -EFAULT;
- if (file->f_mode & FMODE_READ) {
- hal2_stop_adc(hal2);
- hal2->adc.voices = (val) ? 2 : 1;
- hal2_setup_adc(hal2);
- }
- if (file->f_mode & FMODE_WRITE) {
- hal2_stop_dac(hal2);
- hal2->dac.voices = (val) ? 2 : 1;
- hal2_setup_dac(hal2);
- }
- return 0;
- case SNDCTL_DSP_CHANNELS:
- if (get_user(val, (int *)arg))
- return -EFAULT;
- if (val != 0) {
- if (file->f_mode & FMODE_READ) {
- hal2_stop_adc(hal2);
- hal2->adc.voices = (val == 1) ? 1 : 2;
- hal2_setup_adc(hal2);
- }
- if (file->f_mode & FMODE_WRITE) {
- hal2_stop_dac(hal2);
- hal2->dac.voices = (val == 1) ? 1 : 2;
- hal2_setup_dac(hal2);
- }
- }
- val = -EINVAL;
- if (file->f_mode & FMODE_READ)
- val = hal2->adc.voices;
- if (file->f_mode & FMODE_WRITE)
- val = hal2->dac.voices;
- return put_user(val, (int *)arg);
-
- case SNDCTL_DSP_GETFMTS: /* Returns a mask */
- return put_user(H2_SUPPORTED_FORMATS, (int *)arg);
-
- case SNDCTL_DSP_SETFMT: /* Selects ONE fmt*/
- if (get_user(val, (int *)arg))
- return -EFAULT;
- if (val != AFMT_QUERY) {
- if (!(val & H2_SUPPORTED_FORMATS))
- return -EINVAL;
- if (file->f_mode & FMODE_READ) {
- hal2_stop_adc(hal2);
- hal2->adc.format = val;
- hal2_setup_adc(hal2);
- }
- if (file->f_mode & FMODE_WRITE) {
- hal2_stop_dac(hal2);
- hal2->dac.format = val;
- hal2_setup_dac(hal2);
- }
- } else {
- val = -EINVAL;
- if (file->f_mode & FMODE_READ)
- val = hal2->adc.format;
- if (file->f_mode & FMODE_WRITE)
- val = hal2->dac.format;
- }
- return put_user(val, (int *)arg);
-
- case SNDCTL_DSP_POST:
- return 0;
- case SNDCTL_DSP_GETOSPACE: {
- unsigned long flags;
- audio_buf_info info;
- hal2_buf_t *buf;
- hal2_codec_t *dac = &hal2->dac;
-
- if (!(file->f_mode & FMODE_WRITE))
- return -EINVAL;
-
- spin_lock_irqsave(&dac->lock, flags);
- info.fragments = 0;
- buf = dac->head;
- while (buf->info.cnt == 0 && buf != dac->tail) {
- info.fragments++;
- buf = buf->info.next;
- }
- spin_unlock_irqrestore(&dac->lock, flags);
-
- info.fragstotal = obuffers;
- info.fragsize = H2_BUFFER_SIZE;
- info.bytes = info.fragsize * info.fragments;
- return copy_to_user((void *)arg, &info, sizeof(info)) ? -EFAULT : 0;
- }
-
- case SNDCTL_DSP_GETISPACE: {
- unsigned long flags;
- audio_buf_info info;
- hal2_buf_t *buf;
- hal2_codec_t *adc = &hal2->adc;
-
- if (!(file->f_mode & FMODE_READ))
- return -EINVAL;
-
- spin_lock_irqsave(&adc->lock, flags);
- info.fragments = 0;
- info.bytes = 0;
- buf = adc->tail;
- while (buf->info.cnt > 0 && buf != adc->head) {
- info.fragments++;
- info.bytes += buf->info.cnt;
- buf = buf->info.next;
- }
- spin_unlock_irqrestore(&adc->lock, flags);
- info.fragstotal = ibuffers;
- info.fragsize = H2_BUFFER_SIZE;
-
- return copy_to_user((void *)arg, &info, sizeof(info)) ? -EFAULT : 0;
- }
- case SNDCTL_DSP_NONBLOCK:
- file->f_flags |= O_NONBLOCK;
- return 0;
-
- case SNDCTL_DSP_GETBLKSIZE:
- return put_user(H2_BUFFER_SIZE, (int *)arg);
-
- case SNDCTL_DSP_SETFRAGMENT:
- return 0;
- case SOUND_PCM_READ_RATE:
- val = -EINVAL;
- if (file->f_mode & FMODE_READ)
- val = hal2->adc.sample_rate;
- if (file->f_mode & FMODE_WRITE)
- val = hal2->dac.sample_rate;
- return put_user(val, (int *)arg);
- case SOUND_PCM_READ_CHANNELS:
- val = -EINVAL;
- if (file->f_mode & FMODE_READ)
- val = hal2->adc.voices;
- if (file->f_mode & FMODE_WRITE)
- val = hal2->dac.voices;
- return put_user(val, (int *)arg);
- case SOUND_PCM_READ_BITS:
- val = 16;
- return put_user(val, (int *)arg);
- }
-
- return hal2_mixer_ioctl(hal2, cmd, arg);
- }
- static ssize_t hal2_read(struct file *file, char *buffer,
- size_t count, loff_t *ppos)
- {
- ssize_t err;
- hal2_card_t *hal2 = (hal2_card_t *) file->private_data;
- hal2_codec_t *adc = &hal2->adc;
- if (count == 0)
- return 0;
- if (ppos != &file->f_pos)
- return -ESPIPE;
-
- down(&adc->sem);
-
- if (file->f_flags & O_NONBLOCK) {
- err = hal2_get_buffer(hal2, buffer, count);
- err = err == 0 ? -EAGAIN : err;
- } else {
- do {
- /* ~10% longer */
- signed long timeout = 1000 * H2_BUFFER_SIZE *
- 2 * adc->voices * HZ / adc->sample_rate / 900;
- DECLARE_WAITQUEUE(wait, current);
- ssize_t cnt = 0;
-
- err = hal2_get_buffer(hal2, buffer, count);
- if (err > 0) {
- count -= err;
- cnt += err;
- buffer += err;
- err = cnt;
- }
- if (count > 0 && err >= 0) {
- add_wait_queue(&adc->dma_wait, &wait);
- set_current_state(TASK_INTERRUPTIBLE);
- /* Well, it is possible, that interrupt already
- * arrived. Hmm, shit happens, we have one more
- * buffer filled ;) */
- if (!schedule_timeout(timeout))
- /* We may get bogus timeout when system
- * is heavily loaded */
- if (!adc->tail->info.cnt) {
- printk("HAL2: timeout...n");
- hal2_stop_adc(hal2);
- hal2_reset_adc_pointer(hal2);
- err = -EAGAIN;
- }
- if (signal_pending(current))
- err = -ERESTARTSYS;
- remove_wait_queue(&adc->dma_wait, &wait);
- }
- } while (count > 0 && err >= 0);
-
- }
-
- up(&adc->sem);
-
- return err;
- }
- static ssize_t hal2_write(struct file *file, const char *buffer,
- size_t count, loff_t *ppos)
- {
- ssize_t err;
- char *buf = (char*) buffer;
- hal2_card_t *hal2 = (hal2_card_t *) file->private_data;
- hal2_codec_t *dac = &hal2->dac;
- if (count == 0)
- return 0;
- if (ppos != &file->f_pos)
- return -ESPIPE;
- down(&dac->sem);
- if (file->f_flags & O_NONBLOCK) {
- err = hal2_add_buffer(hal2, buf, count);
- err = err == 0 ? -EAGAIN : err;
- } else {
- do {
- /* ~10% longer */
- signed long timeout = 1000 * H2_BUFFER_SIZE *
- 2 * dac->voices * HZ / dac->sample_rate / 900;
- DECLARE_WAITQUEUE(wait, current);
- ssize_t cnt = 0;
-
- err = hal2_add_buffer(hal2, buf, count);
- if (err > 0) {
- count -= err;
- cnt += err;
- buf += err;
- err = cnt;
- }
- if (count > 0 && err >= 0) {
- add_wait_queue(&dac->dma_wait, &wait);
- set_current_state(TASK_INTERRUPTIBLE);
- /* Well, it is possible, that interrupt already
- * arrived. Hmm, shit happens, we have one more
- * buffer free ;) */
- if (!schedule_timeout(timeout))
- /* We may get bogus timeout when system
- * is heavily loaded */
- if (dac->head->info.cnt) {
- printk("HAL2: timeout...n");
- hal2_stop_dac(hal2);
- hal2_reset_dac_pointer(hal2);
- err = -EAGAIN;
- }
- if (signal_pending(current))
- err = -ERESTARTSYS;
- remove_wait_queue(&dac->dma_wait, &wait);
- }
- } while (count > 0 && err >= 0);
- }
-
- up(&dac->sem);
- return err;
- }
- static unsigned int hal2_poll(struct file *file, struct poll_table_struct *wait)
- {
- unsigned long flags;
- unsigned int mask = 0;
- hal2_card_t *hal2 = (hal2_card_t *) file->private_data;
- if (file->f_mode & FMODE_READ) {
- hal2_codec_t *adc = &hal2->adc;
-
- poll_wait(file, &hal2->adc.dma_wait, wait);
- spin_lock_irqsave(&adc->lock, flags);
- if (adc->tail->info.cnt > 0)
- mask |= POLLIN;
- spin_unlock_irqrestore(&adc->lock, flags);
- }
-
- if (file->f_mode & FMODE_WRITE) {
- hal2_codec_t *dac = &hal2->dac;
-
- poll_wait(file, &dac->dma_wait, wait);
- spin_lock_irqsave(&dac->lock, flags);
- if (dac->head->info.cnt == 0)
- mask |= POLLOUT;
- spin_unlock_irqrestore(&dac->lock, flags);
- }
-
- return mask;
- }
- static int hal2_open(struct inode *inode, struct file *file)
- {
- int err;
- hal2_card_t *hal2 = hal2_dsp_find_card(MINOR(inode->i_rdev));
- DEBUG("opening audio device.n");
- if (!hal2) {
- printk("HAL2: Whee?! Open door and go away!n");
- return -ENODEV;
- }
- file->private_data = hal2;
- if (file->f_mode & FMODE_READ) {
- if (hal2->adc.usecount)
- return -EBUSY;
-
- /* OSS spec wanted us to use 8 bit, 8 kHz mono by default,
- * but HAL2 can't do 8bit audio */
- hal2->adc.format = AFMT_S16_BE;
- hal2->adc.voices = 1;
- hal2->adc.sample_rate = hal2_compute_rate(&hal2->adc, 8000);
- hal2_set_adc_rate(hal2);
- /* alloc DMA buffers */
- err = hal2_alloc_adc_dmabuf(hal2);
- if (err)
- return err;
- hal2_setup_adc(hal2);
- hal2->adc.usecount++;
- }
- if (file->f_mode & FMODE_WRITE) {
- if (hal2->dac.usecount)
- return -EBUSY;
- hal2->dac.format = AFMT_S16_BE;
- hal2->dac.voices = 1;
- hal2->dac.sample_rate = hal2_compute_rate(&hal2->dac, 8000);
- hal2_set_dac_rate(hal2);
- /* alloc DMA buffers */
- err = hal2_alloc_dac_dmabuf(hal2);
- if (err)
- return err;
- hal2_setup_dac(hal2);
-
- hal2->dac.usecount++;
- }
-
- return 0;
- }
- static int hal2_release(struct inode *inode, struct file *file)
- {
- hal2_card_t *hal2 = (hal2_card_t *) file->private_data;
- if (file->f_mode & FMODE_READ) {
- hal2_stop_adc(hal2);
- hal2_free_adc_dmabuf(hal2);
- hal2->adc.usecount--;
- }
- if (file->f_mode & FMODE_WRITE) {
- hal2_sync_dac(hal2);
- hal2_free_dac_dmabuf(hal2);
- hal2->dac.usecount--;
- }
- return 0;
- }
- static struct file_operations hal2_audio_fops = {
- owner: THIS_MODULE,
- llseek: no_llseek,
- read: hal2_read,
- write: hal2_write,
- poll: hal2_poll,
- ioctl: hal2_ioctl,
- open: hal2_open,
- release: hal2_release,
- };
- static struct file_operations hal2_mixer_fops = {
- owner: THIS_MODULE,
- llseek: no_llseek,
- ioctl: hal2_ioctl_mixdev,
- open: hal2_open_mixdev,
- release: hal2_release_mixdev,
- };
- static int hal2_request_irq(hal2_card_t *hal2, int irq)
- {
- unsigned long flags;
- int ret = 0;
- save_and_cli(flags);
- if (request_irq(irq, hal2_interrupt, SA_SHIRQ, hal2str, hal2)) {
- printk(KERN_ERR "HAL2: Can't get irq %dn", irq);
- ret = -EAGAIN;
- }
- restore_flags(flags);
- return ret;
- }
- static int hal2_alloc_resources(hal2_card_t *hal2, struct hpc3_regs *hpc3)
- {
- hal2_pbus_t *pbus;
- pbus = &hal2->dac.pbus;
- pbus->pbusnr = 0;
- pbus->pbus = &hpc3->pbdma[pbus->pbusnr];
- /* The spec says that we should write 0x08248844 but that's WRONG. HAL2
- * does 8 bit DMA, not 16 bit even if it generates 16 bit audio. */
- hpc3->pbus_dmacfgs[pbus->pbusnr][0] = 0x08208844; /* Magic :-) */
- pbus = &hal2->adc.pbus;
- pbus->pbusnr = 1;
- pbus->pbus = &hpc3->pbdma[pbus->pbusnr];
- hpc3->pbus_dmacfgs[pbus->pbusnr][0] = 0x08208844; /* Magic :-) */
- return hal2_request_irq(hal2, SGI_HPCDMA_IRQ);
- }
- static void hal2_init_codec(hal2_codec_t *codec)
- {
- init_waitqueue_head(&codec->dma_wait);
- init_MUTEX(&codec->sem);
- spin_lock_init(&codec->lock);
- }
- static void hal2_free_resources(hal2_card_t *hal2)
- {
- free_irq(SGI_HPCDMA_IRQ, hal2);
- }
- static int hal2_detect(hal2_card_t *hal2)
- {
- unsigned short board, major, minor;
- unsigned short rev;
- /* reset HAL2 */
- hal2_isr_write(hal2, 0);
- /* release reset */
- hal2_isr_write(hal2, H2_ISR_GLOBAL_RESET_N | H2_ISR_CODEC_RESET_N);
- hal2_i_write16(hal2, H2I_RELAY_C, H2I_RELAY_C_STATE);
- if ((rev = hal2_rev_look(hal2)) & H2_REV_AUDIO_PRESENT) {
- DEBUG("HAL2: no device detected, rev: 0x%04hxn", rev);
- return -ENODEV;
- }
- board = (rev & H2_REV_BOARD_M) >> 12;
- major = (rev & H2_REV_MAJOR_CHIP_M) >> 4;
- minor = (rev & H2_REV_MINOR_CHIP_M);
- printk("SGI HAL2 Processor revision %i.%i.%i detectedn",
- board, major, minor);
- if (board != 4 || major != 1 || minor != 0)
- printk( "Other revision than 4.1.0 detected. "
- "Your card is probably unsupportedn");
- return 0;
- }
- static int hal2_init_card(hal2_card_t **phal2, struct hpc3_regs *hpc3,
- unsigned long hpc3_base)
- {
- int ret = 0;
- hal2_card_t *hal2;
-
- hal2 = (hal2_card_t *) kmalloc(sizeof(hal2_card_t), GFP_KERNEL);
- if (!hal2)
- return -ENOMEM;
- memset(hal2, 0, sizeof(hal2_card_t));
- hal2->ctl_regs = (hal2_ctl_regs_t *) KSEG1ADDR(hpc3_base + H2_CTL_PIO);
- hal2->aes_regs = (hal2_aes_regs_t *) KSEG1ADDR(hpc3_base + H2_AES_PIO);
- hal2->vol_regs = (hal2_vol_regs_t *) KSEG1ADDR(hpc3_base + H2_VOL_PIO);
- hal2->syn_regs = (hal2_syn_regs_t *) KSEG1ADDR(hpc3_base + H2_SYN_PIO);
- if (hal2_detect(hal2) < 0) {
- printk("HAL2 audio processor not foundn");
- ret = -ENODEV;
- goto fail1;
- }
- hal2_init_codec(&hal2->dac);
- hal2_init_codec(&hal2->adc);
- ret = hal2_alloc_resources(hal2, hpc3);
- if (ret)
- goto fail1;
-
- hal2_init_mixer(hal2);
- hal2->dev_dsp = register_sound_dsp(&hal2_audio_fops, -1);
- if (hal2->dev_dsp < 0) {
- ret = hal2->dev_dsp;
- goto fail2;
- }
- hal2->dev_mixer = register_sound_mixer(&hal2_mixer_fops, -1);
- if (hal2->dev_mixer < 0) {
- ret = hal2->dev_mixer;
- goto fail3;
- }
-
- *phal2 = hal2;
- return 0;
- fail3:
- unregister_sound_dsp(hal2->dev_dsp);
- fail2:
- hal2_free_resources(hal2);
- fail1:
- kfree(hal2);
-
- return ret;
- }
- /*
- * We are assuming only one HAL2 card. If you ever meet machine with more than
- * one, tell immediately about it to someone. Preferably to me. --ladis
- */
- static int __init init_hal2(void)
- {
- int i;
- for (i = 0; i < MAXCARDS; i++)
- hal2_card[i] = NULL;
- return hal2_init_card(&hal2_card[0], hpc3c0, HPC3_CHIP0_PBASE);
- }
- static void __exit exit_hal2(void)
- {
- int i;
-
- for (i = 0; i < MAXCARDS; i++)
- if (hal2_card[i]) {
- hal2_free_resources(hal2_card[i]);
- unregister_sound_dsp(hal2_card[i]->dev_dsp);
- unregister_sound_mixer(hal2_card[i]->dev_mixer);
- kfree(hal2_card[i]);
- }
- }
- module_init(init_hal2);
- module_exit(exit_hal2);
- MODULE_DESCRIPTION("OSS compatible driver for SGI HAL2 audio");
- MODULE_AUTHOR("Ladislav Michl");
- MODULE_LICENSE("GPL");