diff options
Diffstat (limited to 'drivers/sound/hal2.c')
| -rw-r--r-- | drivers/sound/hal2.c | 1529 |
1 files changed, 1529 insertions, 0 deletions
diff --git a/drivers/sound/hal2.c b/drivers/sound/hal2.c new file mode 100644 index 000000000..6a70267cc --- /dev/null +++ b/drivers/sound/hal2.c @@ -0,0 +1,1529 @@ +/* $Id: hal2.c,v 1.13 1999/02/07 22:18:37 ulfc Exp $ + * + * drivers/sgi/audio/hal2.c + * + * Copyright (C) 1998-1999 Ulf Carlsson (ulfc@bun.falkenberg.se) + * + */ + +#include <linux/kernel.h> +#include <linux/sched.h> +#include <linux/errno.h> +#include <linux/types.h> +#include <linux/interrupt.h> +#include <linux/malloc.h> +#include <linux/string.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/delay.h> +#include <linux/poll.h> +#include <linux/soundcard.h> +#include <linux/sound.h> + +#include <asm/uaccess.h> +#include <asm/system.h> +#include <asm/page.h> +#include <asm/io.h> +#include <asm/sgihpc.h> + +#include "hal2.h" + +#define DEBUG + +static const unsigned sample_size[] = { 2, 4 }; +static const unsigned sample_shift[] = { 1, 2 }; + +struct hal2_ring_buf { + struct hpc_dma_desc desc; + + struct hal2_ring_buf *next; + unsigned long buf; /* pointer in KSEG1 address space */ +}; + +/* As you might know, dma descriptors must be 8 byte aligned, that's why we have + * them in this special way. + */ + +struct hal2_state { + /* soundcore stuff */ + int dev_audio; + int dev_mixer; + int dev_dac; + + int irq; + + unsigned int dacrate, adcrate; + + spinlock_t lock; + struct semaphore open_sem; + mode_t open_mode; + struct wait_queue *open_wait; + + struct dmabuf { + void *rawbuf; + unsigned int buforder; + struct hal2_ring_buf *ringbuf; + + struct hpc3_pbus_dmacregs *pbus; + int pbusnr; + + unsigned int numfrag; + unsigned int fragshift; + int swptr; + int hwptr; + + unsigned int total_bytes; + + int count; + unsigned int error; /* over/underrun */ + struct wait_queue *wait; + + + /* Internal flags */ + unsigned little_end:1; + unsigned stereo:1; + unsigned receive:1; + unsigned pbus_setup:1; + unsigned pbus_en:1; + unsigned port_en:1; + + /* redundant, but makes calculations easier */ + unsigned fragsize; + unsigned dmasize; + unsigned fragsamples; + + /* OSS stuff */ + unsigned mapped:1; + unsigned ready:1; + unsigned endcleared:1; + unsigned ossfragshift; + int ossmaxfrags; + unsigned subdivision; + } dma_dac, dma_adc; +}; + +struct hal2_state *dev; + +/* ------------------------------------------------------------------------ */ + +extern 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; +} + +/* ------------------------------------------------------------------ */ + +#define INDIRECT_WAIT(regs) while(regs->isr & H2_ISR_TSTATUS); + +#if 0 +#define INDIRECT_WAIT(regs) \ +{ \ + int cnt = 1000; \ + printk("hal2: waiting isr:%04hx ", regs->isr); \ + printk("idr0:%04hx idr1:%04hx idr2:%04hx idr3:%04hx\n", \ + regs->idr0, regs->idr1, regs->idr2, regs->idr3); \ + \ + while(regs->isr & H2_ISR_TSTATUS && --cnt) \ + udelay(5); \ + if (!cnt) \ + printk("hal2: failed waiting for indirect trans.\n"); \ + \ + printk("hal2: finished waiting at cnt:%d isr:%04hx ", \ + cnt, regs->isr); \ + printk("idr0:%04hx idr1:%04hx idr2:%04hx idr3:%04hx\n", \ + regs->idr0, regs->idr1, regs->idr2, regs->idr3); \ +} +#endif + +#define READ_ADDR(addr) (addr | (1<<7)) +#define WRITE_ADDR(addr) (addr) + +static unsigned short ireg_read16(unsigned short address) +{ + + h2_ctrl->iar = READ_ADDR(address); + INDIRECT_WAIT(h2_ctrl); + return h2_ctrl->idr0; +} + +static unsigned long ireg_read32(unsigned short address) +{ + unsigned long ret; + + h2_ctrl->iar = READ_ADDR(address); + INDIRECT_WAIT(h2_ctrl); + ret = h2_ctrl->idr0; + h2_ctrl->iar = READ_ADDR(address | 0x1); + INDIRECT_WAIT(h2_ctrl); + ret |= h2_ctrl->idr0 << 16; + return ret; +} + +static void ireg_write16(unsigned short address, unsigned short val) +{ + h2_ctrl->idr0 = val; + h2_ctrl->iar = WRITE_ADDR(address); + INDIRECT_WAIT(h2_ctrl) +} + +static void ireg_write32(unsigned short address, unsigned long val) +{ + h2_ctrl->idr0 = val & 0xffff; + h2_ctrl->idr1 = val >> 16; + h2_ctrl->iar = WRITE_ADDR(address); + INDIRECT_WAIT(h2_ctrl) +} + +static void ireg_write64(unsigned short address, unsigned long long val) +{ + h2_ctrl->idr0 = val & 0xffff; + h2_ctrl->idr1 = (val >> 16) & 0xffff; + h2_ctrl->idr2 = (val >> 32) & 0xffff; + h2_ctrl->idr3 = (val >> 48); + h2_ctrl->iar = WRITE_ADDR(address); + INDIRECT_WAIT(h2_ctrl) +} + +static void ireg_setbit16(unsigned short address, unsigned short bit) +{ + h2_ctrl->iar = READ_ADDR(address); + INDIRECT_WAIT(h2_ctrl); + h2_ctrl->idr0 = h2_ctrl->idr0 | bit; + h2_ctrl->iar = WRITE_ADDR(address); + INDIRECT_WAIT(h2_ctrl); +} + +static void ireg_setbit32(unsigned short address, unsigned long bit) +{ + unsigned long tmp; + + h2_ctrl->iar = READ_ADDR(address); + INDIRECT_WAIT(h2_ctrl); + tmp = h2_ctrl->idr0 | (h2_ctrl->idr1 << 16) | bit; + h2_ctrl->idr0 = tmp & 0xffff; + h2_ctrl->idr1 = (tmp >> 16) & 0xffff; + h2_ctrl->iar = WRITE_ADDR(address); + INDIRECT_WAIT(h2_ctrl); +} + +static void ireg_clearbit16(unsigned long address, unsigned short bit) +{ + h2_ctrl->iar = READ_ADDR(address); + INDIRECT_WAIT(h2_ctrl); + h2_ctrl->idr0 = h2_ctrl->idr0 & ~bit; + h2_ctrl->iar = address; + INDIRECT_WAIT(h2_ctrl); +} + +static void ireg_clearbit32(unsigned short address, unsigned long bit) +{ + unsigned long tmp; + + h2_ctrl->iar = READ_ADDR(address); + INDIRECT_WAIT(h2_ctrl); + tmp = (h2_ctrl->idr0 | (h2_ctrl->idr1 << 16)) & ~bit; + h2_ctrl->idr0 = tmp & 0xffff; + h2_ctrl->idr1 = (tmp >> 16) & 0xffff; + h2_ctrl->iar = WRITE_ADDR(address); + INDIRECT_WAIT(h2_ctrl); +} + +static void ireg_setmask16(unsigned short address, int shift, + unsigned short mask, unsigned short bits) +{ + h2_ctrl->iar = READ_ADDR(address); + INDIRECT_WAIT(h2_ctrl); + h2_ctrl->idr0 = (h2_ctrl->idr0 & ~mask) | (bits << shift); + h2_ctrl->iar = WRITE_ADDR(address); + INDIRECT_WAIT(h2_ctrl); +} + +static void ireg_setmask32(unsigned long address, int shift, + unsigned long mask, unsigned long bits) +{ + unsigned long tmp; + + h2_ctrl->iar = READ_ADDR(address); + INDIRECT_WAIT(h2_ctrl); + tmp = ((h2_ctrl->idr1 | h2_ctrl->idr0) & ~mask) | (bits << shift); + h2_ctrl->idr0 = tmp & 0xffff; + h2_ctrl->idr1 = tmp >> 16; + h2_ctrl->iar = WRITE_ADDR(address); + INDIRECT_WAIT(h2_ctrl); +} + +/* -----------------------------------------------------------------------*/ + +/* enable/disable a specific PBUS dma channel */ +static __inline__ void hpcpbus_enable(struct hpc3_pbus_dmacregs *pbus, + struct hpc_dma_desc *desc) +{ + pbus->pbdma_dptr = PHYSADDR(desc); + pbus->pbdma_ctrl |= HPC3_PDMACTRL_ACT; +} + +static __inline__ void hpcpbus_disable(struct hpc3_pbus_dmacregs *pbus) +{ + pbus->pbdma_ctrl &= ~HPC3_PDMACTRL_ACT; +} + +static __inline__ int hpcpbus_int(struct hpc3_pbus_dmacregs *pbus) +{ + /* When we read pbdma_ctrl, bit 0 indicates interrupt signal. + * The interrupt signal is also cleared after read + */ + + return (pbus->pbdma_ctrl & 0x01); +} + +/* ---------------------------------------------------------------------- */ + +/* We have three bresenham clock generators, which we can use independantly. + * + * There is one 44.1k and one 48.0k master clock for each of them. We can + * adjust the inc and the mod values for those clocks, and thus reduce the + * frequency. + * + * freq = master * (inc / mod) + * freq * mod = master * inc + * mod = (master * inc) / freq + * + * where (inc / mod) is a positive fraction in range [0,1]. Inc should always be + * set to 4 for codecs + * + */ + +#define __BUILD_SET_BRESN_CLOCK(clock) \ +static __inline__ void hal2_set_bres##clock(unsigned short master, \ + unsigned long mod) \ +{ \ + unsigned long incmod = (4 << 16) | mod; \ + ireg_write16(H2I_BRES##clock##_C1 , master); \ + ireg_write32(H2I_BRES##clock##_C2 , incmod); \ +} + +__BUILD_SET_BRESN_CLOCK(1) +__BUILD_SET_BRESN_CLOCK(2) +__BUILD_SET_BRESN_CLOCK(3) + +static int hal2_set_adc_rate(struct hal2_state *s, unsigned int rate) +{ + /* XXX how do i set this one? */ + + /* Try both 44.1k master and 48.0k master .. */ + + if ((48000 << 2) % rate == 0) + hal2_set_bres1(0, (48000 << 2) % rate); + else if ((44100 << 2) % rate == 0) + hal2_set_bres1(1, (44100 << 2) % rate); + else + /* this was no valid rate */ + return -EINVAL; + + return 0; +} + +static int hal2_set_dac_rate(struct hal2_state *s, unsigned int rate) +{ + /* Try both 44.1k master and 48.0k master .. */ + + if ((48000 << 2) % rate == 0) { + hal2_set_bres1(0, (48000 << 2) % rate); + s->dacrate = rate; + } else if ((44100 << 2) % rate == 0) { + hal2_set_bres1(1, (44100 << 2) % rate); + s->dacrate = rate; + } else + /* this was no valid rate */ + return -EINVAL; + + return 0; +} + +/* --------------------------------------------------------------------- */ + +static void hal2_stop(struct dmabuf *db) +{ + if (db->pbus_en) { + hpcpbus_disable(db->pbus); + db->pbus_en = 0; + } +#ifdef DEBUG + else + printk("Trying to stop already stopped DMA channel\n"); +#endif +} + +static void hal2_stop_adc(struct hal2_state *s) +{ + struct dmabuf *db = &s->dma_adc; + + hal2_stop(db); +} + +static void hal2_stop_dac(struct hal2_state *s) +{ + struct dmabuf *db = &s->dma_dac; + + hal2_stop(db); +} + + +static void hal2_start_adc(struct hal2_state *s) +{ + unsigned long flags; + + spin_lock_irqsave(&s->lock, flags); + if (!s->dma_adc.port_en && (s->dma_adc.mapped || s->dma_adc.count < (signed)(s->dma_adc.dmasize - 2*s->dma_adc.fragsize)) && s->dma_adc.ready) { + hpcpbus_enable(s->dma_adc.pbus, &s->dma_adc.ringbuf->desc); + s->dma_adc.port_en = 1; + } + spin_unlock_irqrestore(&s->lock, flags); +} + +static void hal2_start_dac(struct hal2_state *s) +{ + unsigned long flags; + + spin_lock_irqsave(&s->lock, flags); + if (!s->dma_dac.port_en && (s->dma_dac.mapped || s->dma_dac.count > 0) + && s->dma_dac.ready) { + hpcpbus_enable(s->dma_dac.pbus, &s->dma_dac.ringbuf->desc); + s->dma_dac.port_en = 1; + } + spin_unlock_irqrestore(&s->lock, flags); + +} + +/* ----------------------------------------------------------------------- */ + +#define DMABUF_DEFAULTORDER (17-PAGE_SHIFT) +#define DMABUF_MINORDER 1 + +static void hal2_dealloc_dmabuf(struct dmabuf *db) +{ + unsigned long map, mapend; + + if (db->rawbuf) { + /* undo marking the pages as reserved */ + mapend = MAP_NR(db->rawbuf + (PAGE_SIZE << db->buforder) -1); + for (map = MAP_NR(db->rawbuf); map <= mapend; map++) + clear_bit(PG_reserved, &mem_map[map].flags); + free_pages((unsigned long)db->rawbuf, db->buforder); + } + db->rawbuf = NULL; + db->mapped = db->ready = 0; +} + +static int hal2_setup_ring(struct dmabuf *db) +{ + int order; + unsigned long buffer; + unsigned long map, mapend; + struct hal2_ring_buf *rbuf; + int i = 0; + + /* FIXME: Clear up the memory leaks here */ + + for (order = DMABUF_DEFAULTORDER; order >= DMABUF_MINORDER; order--) { + buffer = __get_free_pages(GFP_KERNEL, db->buforder); + if (buffer) + break; + } + + if (!buffer) + return -ENOMEM; + + db->buforder = order; + db->rawbuf = (void *) buffer; + + /* we have to mark the pages as reserver, otherwise remap_page_range + * doesn't do what we want for some */ + + mapend = MAP_NR(db->rawbuf + (PAGE_SIZE << db->buforder) - 1); + for (map = MAP_NR(db->rawbuf); map <= mapend; map++) + set_bit(PG_reserved, &mem_map[map].flags); + + db->ringbuf = kmalloc(sizeof (struct hal2_ring_buf), GFP_KERNEL); + if (!db->ringbuf) + return -ENOMEM; + + rbuf = db->ringbuf; + rbuf->desc.pbuf = PHYSADDR(buffer + i * PAGE_SIZE); + rbuf->buf = KSEG1ADDR(buffer + i * PAGE_SIZE); + i++; + + while (i++ < (1 << db->buforder)) { + rbuf->next = kmalloc(sizeof (struct hal2_ring_buf), GFP_KERNEL); + if (!db->ringbuf) + return -ENOMEM; + + buffer = get_free_page(GFP_KERNEL); + if (!buffer) + return -ENOMEM; + + /* we have to link the physical DMA buffers with phyical + * addresses first so that the HPC3 knows what to do */ + + rbuf->desc.pnext = PHYSADDR(buffer + i * PAGE_SIZE); + + rbuf = rbuf->next; + rbuf->buf = KSEG1ADDR(buffer + i * PAGE_SIZE); + rbuf->desc.pbuf = PHYSADDR(buffer + i * PAGE_SIZE); + } + + rbuf->next = db->ringbuf; + rbuf->desc.pnext = db->ringbuf->desc.pbuf; /* make it a ring! */ + + return 0; +} + +static void hal2_reset_adc_ring(struct hal2_state *s) + +{ + struct hal2_ring_buf *first, *rbuf; + + first = s->dma_adc.ringbuf; + + for (rbuf = first; rbuf->next != first; rbuf = rbuf->next) + rbuf->desc.cntinfo = HPCDMA_XIE | PAGE_SIZE; + + rbuf->desc.cntinfo = HPCDMA_XIE | PAGE_SIZE; +} + +static void hal2_reset_dac_ring(struct hal2_state *s) + +{ + struct hal2_ring_buf *first, *rbuf; + + first = s->dma_dac.ringbuf; + + for (rbuf = first; rbuf->next != first; rbuf = rbuf->next) + rbuf->desc.cntinfo = HPCDMA_XIE | PAGE_SIZE; + + rbuf->desc.cntinfo = HPCDMA_XIE | PAGE_SIZE; +} + +static int hal2_setup_pbus(struct hal2_state *s, struct dmabuf *db, int pbusnr) +{ + struct hpc3_pbus_dmacregs *pbus = &hpc3c0->pbdma0; + int sampsz, highwater, fifosize; + unsigned long ctrl; + unsigned long fifobeg, fifoend; + + db->pbusnr = pbusnr; + db->pbus = &pbus[pbusnr]; + + sampsz = (db->stereo ? 4 : 2); + + /* an audio fifo should be 4 samples long and doubleword aligned, + highwater should be half the fifo size */ + + fifosize = (sampsz * 4) >> 3; /* doublewords */ + highwater = (sampsz * 2) >> 1; /* halfwords */ + + /* DAC is always before ADC in our PBUS DMA FIFO. Reserve space for the + * maximum fifo length, we might change to stereo later if we're in mono + * now + */ + + fifobeg = (db->pbusnr == 1) ? 0 : (4 * 4) >> 3; + + fifoend = fifobeg + fifosize; + + ctrl = HPC3_PDMACTRL_RT | (db->receive ? HPC3_PDMACTRL_RCV : 0) | + (db->little_end ? HPC3_PDMACTRL_SEL : 0); + + pbus->pbdma_ctrl = (highwater << 8) | (fifobeg << 16) | + (fifoend << 24) | ctrl; + + /* Realtime, 16-bit, cycles to spend and more default settings for + * soundcards, taken directly from the spec. */ + hpc3c0->pbus_dmacfgs[db->pbusnr][0] = 0x8248844; + + return 0; +} + +static int hal2_prog_dmabuf(struct hal2_state *s, struct dmabuf *db, + unsigned rate) +{ + unsigned bytespersec; + unsigned bufs; + int err; + + db->hwptr = db->swptr = db->total_bytes = db->count = db->error = + db->endcleared = 0; + + if (!db->rawbuf) { + db->ready = db->mapped = 0; + err = hal2_setup_ring(db); + if (err) + return err; + } + + bytespersec = rate << sample_shift[db->stereo]; + bufs = PAGE_SIZE << db->buforder; + if (db->ossfragshift) { + if ((1000 << db->ossfragshift) < bytespersec) + db->fragshift = ld2(bytespersec/1000); + else + db->fragshift = db->ossfragshift; + } else { + db->fragshift = ld2(bytespersec/100/(db->subdivision ? db->subdivision : 1)); + if (db->fragshift < 3) + db->fragshift = 3; + } + db->numfrag = bufs >> db->fragshift; + while (db->numfrag < 4 && db->fragshift > 3) { + db->fragshift--; + db->numfrag = bufs >> db->fragshift; + } + db->fragsize = 1 << db->fragshift; + if (db->ossmaxfrags >= 4 && db->ossmaxfrags < db->numfrag) + db->numfrag = db->ossmaxfrags; + db->fragsamples = db->fragsize >> sample_shift[db->stereo]; + db->dmasize = db->numfrag << db->fragshift; + memset(db->rawbuf, 0, db->dmasize); + return 0; +} + +static __inline__ int hal2_prog_dmabuf_adc(struct hal2_state *s) +{ + int err; + + hal2_stop_adc(s); + + err = hal2_setup_pbus(s, &s->dma_adc, 1); + if (err) + return err; + + err = hal2_prog_dmabuf(s, &s->dma_adc, s->adcrate); + if (err) + return err; + + hal2_reset_adc_ring(s); + + hal2_set_adc_rate(s, s->adcrate); + + ireg_write16(H2I_ADC_C1, + (0 << H2I_ADC_C1_DMA_SHIFT) | + (1 << H2I_ADC_C1_CLKID_SHIFT) | + (s->dma_adc.stereo << H2I_ADC_C1_DATAT_SHIFT)); + ireg_setbit16(H2I_DMA_PORT_EN, H2I_DMA_PORT_EN_CODECR); + + ireg_setbit16(H2I_DMA_DRV, (1 << 0)); + + s->dma_adc.ready = 1; + + return 0; +} + +static __inline__ int hal2_prog_dmabuf_dac(struct hal2_state *s) +{ + int err; + + hal2_stop_adc(s); + + err = hal2_setup_pbus(s, &s->dma_dac, 2); + if (err) + return err; + + err = hal2_prog_dmabuf(s, &s->dma_dac, s->dacrate); + if (err) + return err; + + hal2_reset_dac_ring(s); + + hal2_set_dac_rate(s, s->dacrate); + + ireg_write32(H2I_DAC_C1, + (1 << H2I_DAC_C1_DMA_SHIFT) | + (2 << H2I_DAC_C1_CLKID_SHIFT) | + (s->dma_dac.stereo << H2I_ADC_C1_DATAT_SHIFT)); + + ireg_setbit16(H2I_DMA_PORT_EN, H2I_DMA_PORT_EN_CODECR); + + ireg_setbit16(H2I_DMA_DRV, (1 << 1)); + + s->dma_dac.ready = 1; + + return 0; +} + +static __inline__ unsigned int hal2_get_hwptr(struct hal2_state *s, + struct dmabuf *db) +{ + return db->pbus->pbdma_bptr; +} + +extern __inline__ void clear_advance(void *buf, unsigned bsize, unsigned bptr, + unsigned len, unsigned char c) +{ + if (bptr + len > bsize) { + unsigned x = bsize - bptr; + memset(((char *)buf) + bptr, c, x); + bptr = 0; + len -= x; + } + memset(((char *)buf) + bptr, c, len); +} + +static void hal2_update_ptr(struct hal2_state *s) +{ + int diff; + + /* update ADC pointer */ + if (s->dma_adc.port_en) { + diff = hal2_get_hwptr(s, &s->dma_adc); + s->dma_adc.total_bytes += diff; + s->dma_adc.count += diff; + if (s->dma_adc.mapped) { + if (s->dma_adc.count >= s->dma_adc.fragsize) + wake_up(&s->dma_adc.wait); + } else { + if (s->dma_adc.count > (signed)(s->dma_adc.dmasize - ((3 * s->dma_adc.fragsize) >> 1))) { + hal2_stop_adc(s); + s->dma_adc.error++; + } + if (s->dma_adc.count > 0) + wake_up(&s->dma_adc.wait); + } + } + + /* update DAC1 pointer */ + if (s->dma_dac.port_en) { + diff = hal2_get_hwptr(s, &s->dma_dac); + s->dma_dac.total_bytes += diff; + if (s->dma_dac.mapped) { + s->dma_dac.count += diff; + if (s->dma_dac.count >= (signed)s->dma_dac.fragsize) + wake_up(&s->dma_dac.wait); + } else { + s->dma_dac.count -= diff; + if (s->dma_dac.count <= 0) { + hal2_stop_dac(s); + s->dma_dac.error++; + } else if (s->dma_dac.count <= + (signed)s->dma_dac.fragsize && + !s->dma_dac.endcleared) { + clear_advance(s->dma_dac.rawbuf, + s->dma_dac.dmasize, + s->dma_dac.swptr, + s->dma_dac.fragsize, 0); + s->dma_dac.endcleared = 1; + } + if (s->dma_dac.count < (signed)s->dma_dac.dmasize) + wake_up(&s->dma_dac.wait); + } + } +} + +void hal2_interrupt(int irq, void *dev_id, struct pt_regs *regs) +{ + struct hal2_state *s = (struct hal2_state *) dev_id; + + spin_lock(&s->lock); + + if ((s->dma_adc.pbus_en && hpcpbus_int(s->dma_adc.pbus))|| + (s->dma_dac.pbus_en && hpcpbus_int(s->dma_dac.pbus))) + hal2_update_ptr(s); + + spin_unlock(&s->lock); +} + + +static __inline__ void hal2_clear_advance(void *buf, unsigned long bsize, + unsigned long bptr, unsigned int len, + unsigned char c) +{ + if (bptr + len > bsize) { + unsigned long x = bsize - bptr; + memset(((char *)buf) + bptr, c, x); + bptr = 0; + len -= x; + } + memset(((char *)buf) + bptr, c, len); +} + + +/* ----------------------------------------------------------------------- */ + +static int hal2_drain_dac(struct hal2_state *s, int nonblock) +{ + struct wait_queue wait = { current, NULL }; + unsigned long flags; + int count, tmo; + + if (s->dma_dac.mapped) + return 0; + current->state = TASK_INTERRUPTIBLE; + add_wait_queue(&s->dma_dac.wait, &wait); + 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) { + remove_wait_queue(&s->dma_dac.wait, &wait); + current->state = TASK_RUNNING; + return -EBUSY; + } + tmo = (count * HZ) / s->dacrate; + tmo >>= sample_shift[(s->dma_dac.stereo)?0:1]; + + if (!schedule_timeout(tmo ? : 1) && tmo) + printk(KERN_DEBUG ": dma timed out??\n"); + } + remove_wait_queue(&s->dma_dac.wait, &wait); + current->state = TASK_RUNNING; + if (signal_pending(current)) + return -ERESTARTSYS; + return 0; +} + +static ssize_t hal2_read(struct file *file, char *buffer, size_t count, + loff_t *ppos) +{ + struct hal2_state *s = (struct hal2_state *)file->private_data; + ssize_t ret; + unsigned long flags; + unsigned swptr; + int cnt; + + if (!s) + return -ENXIO; + if (ppos != &file->f_pos) + return -ESPIPE; + if (s->dma_adc.mapped) + return -ENXIO; + if (!s->dma_adc.ready && (ret = hal2_prog_dmabuf_adc(s))) + return ret; + if (!access_ok(VERIFY_WRITE, buffer, count)) + return -EFAULT; + ret = 0; + while (count > 0) { + spin_lock_irqsave(&s->lock, flags); + swptr = s->dma_adc.swptr; + cnt = s->dma_adc.dmasize-swptr; + if (s->dma_adc.count < cnt) + cnt = s->dma_adc.count; + spin_unlock_irqrestore(&s->lock, flags); + if (cnt > count) + cnt = count; + if (cnt <= 0) { + hal2_start_adc(s); + if (file->f_flags & O_NONBLOCK) + return ret ? ret : -EBUSY; + interruptible_sleep_on(&s->dma_adc.wait); + if (signal_pending(current)) + return ret ? ret : -ERESTARTSYS; + continue; + } + if (copy_to_user(buffer, s->dma_adc.rawbuf + swptr, cnt)) + return ret ? ret : -EFAULT; + swptr = (swptr + cnt) % s->dma_adc.dmasize; + spin_lock_irqsave(&s->lock, flags); + s->dma_adc.swptr = swptr; + s->dma_adc.count -= cnt; + spin_unlock_irqrestore(&s->lock, flags); + count -= cnt; + buffer += cnt; + ret += cnt; + hal2_start_adc(s); + } + return ret; +} + +static ssize_t hal2_write(struct file *file, const char *buffer, size_t count, + loff_t *ppos) +{ + struct hal2_state *s = (struct hal2_state *)file->private_data; + ssize_t ret; + unsigned long flags; + unsigned swptr; + int cnt; + + if (!s) + return -ENXIO; + if (ppos != &file->f_pos) + return -ESPIPE; + if (s->dma_dac.mapped) + return -ENXIO; + if (!s->dma_dac.ready && (ret = hal2_prog_dmabuf_dac(s))) + return ret; + if (!access_ok(VERIFY_READ, buffer, count)) + return -EFAULT; + ret = 0; + while (count > 0) { + spin_lock_irqsave(&s->lock, flags); + if (s->dma_dac.count < 0) { + s->dma_dac.count = 0; + s->dma_dac.swptr = s->dma_dac.hwptr; + } + swptr = s->dma_dac.swptr; + cnt = s->dma_dac.dmasize-swptr; + if (s->dma_dac.count + cnt > s->dma_dac.dmasize) + cnt = s->dma_dac.dmasize - s->dma_dac.count; + spin_unlock_irqrestore(&s->lock, flags); + if (cnt > count) + cnt = count; + if (cnt <= 0) { + hal2_start_dac(s); + if (file->f_flags & O_NONBLOCK) + return ret ? ret : -EBUSY; + interruptible_sleep_on(&s->dma_dac.wait); + if (signal_pending(current)) + return ret ? ret : -ERESTARTSYS; + continue; + } + if (copy_from_user(s->dma_dac.rawbuf + swptr, buffer, cnt)) + return ret ? ret : -EFAULT; + swptr = (swptr + cnt) % s->dma_dac.dmasize; + spin_lock_irqsave(&s->lock, flags); + s->dma_dac.swptr = swptr; + s->dma_dac.count += cnt; + s->dma_dac.endcleared = 0; + spin_unlock_irqrestore(&s->lock, flags); + count -= cnt; + buffer += cnt; + ret += cnt; + hal2_start_dac(s); + } + return ret; +} + + +static unsigned int hal2_poll(struct file *file, struct poll_table_struct *wait) +{ + struct hal2_state *s = (struct hal2_state *)file->private_data; + unsigned long flags; + unsigned int mask = 0; + + if (!s) + return -EINVAL; + if (file->f_flags & FMODE_WRITE) + poll_wait(file, &s->dma_dac.wait, wait); + if (file->f_flags & FMODE_READ) + poll_wait(file, &s->dma_adc.wait, wait); + spin_lock_irqsave(&s->lock, flags); + hal2_update_ptr(s); + if (file->f_flags & FMODE_READ) { + if (s->dma_adc.mapped) { + if (s->dma_adc.count >= (signed)s->dma_adc.fragsize) + mask |= POLLIN | POLLRDNORM; + } else { + if (s->dma_adc.count > 0) + mask |= POLLIN | POLLRDNORM; + } + } + if (file->f_flags & FMODE_WRITE) { + if (s->dma_dac.mapped) { + if (s->dma_dac.count >= (signed)s->dma_dac.fragsize) + mask |= POLLOUT | POLLWRNORM; + } else { + if ((signed)s->dma_dac.dmasize > s->dma_dac.count) + mask |= POLLOUT | POLLWRNORM; + } + } + spin_unlock_irqrestore(&s->lock, flags); + return mask; +} + +static int hal2_mmap(struct file *file, struct vm_area_struct *vma) +{ + struct hal2_state *s = (struct hal2_state *)file->private_data; + struct dmabuf *db; + int ret; + unsigned long size; + + if (!s) + return -EINVAL; + if (vma->vm_flags & VM_WRITE) { + if ((ret = hal2_prog_dmabuf_dac(s)) != 0) + return ret; + db = &s->dma_dac; + } else if (vma->vm_flags & VM_READ) { + if ((ret = hal2_prog_dmabuf_adc(s)) != 0) + return ret; + db = &s->dma_adc; + } else + return -EINVAL; + if (vma->vm_offset != 0) + return -EINVAL; + size = vma->vm_end - vma->vm_start; + if (size > (PAGE_SIZE << db->buforder)) + return -EINVAL; + if (remap_page_range(vma->vm_start, PHYSADDR(db->rawbuf), size, vma->vm_page_prot)) + return -EAGAIN; + db->mapped = 1; + vma->vm_file = file; + file->f_count++; + return 0; +} + +static int hal2_ioctl(struct inode *inode, struct file *file, unsigned int cmd, + unsigned long arg) +{ + struct hal2_state *s = (struct hal2_state *)file->private_data; + unsigned long flags; + audio_buf_info abinfo; + count_info cinfo; + int val, mapped, ret; + + if (!s) + return -EINVAL; + mapped = ((file->f_mode & FMODE_WRITE) && s->dma_dac.mapped) || + ((file->f_mode & FMODE_READ) && s->dma_adc.mapped); + switch (cmd) { + case OSS_GETVERSION: + return put_user(SOUND_VERSION, (int *)arg); + + case SNDCTL_DSP_SYNC: + if (file->f_mode & FMODE_WRITE) + /* XXX check what drain really should do */ + return hal2_drain_dac(s, 0/*file->f_flags & O_NONBLOCK*/); + return 0; + + case SNDCTL_DSP_SETDUPLEX: + return 0; + + case SNDCTL_DSP_GETCAPS: + /* XXX do we really support trigger? */ + 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) { + hal2_stop_dac(s); + synchronize_irq(); + s->dma_dac.swptr = s->dma_dac.hwptr = s->dma_dac.count = s->dma_dac.total_bytes = 0; + } + if (file->f_mode & FMODE_READ) { + hal2_stop_adc(s); + synchronize_irq(); + s->dma_adc.swptr = s->dma_adc.hwptr = s->dma_adc.count = s->dma_adc.total_bytes = 0; + } + return 0; + + case SNDCTL_DSP_SPEED: + get_user_ret(val, (int *)arg, -EFAULT); + if (val >= 0) { + if (file->f_mode & FMODE_READ) { + hal2_stop_adc(s); + s->dma_adc.ready = 0; + hal2_set_adc_rate(s, val); + } + if (file->f_mode & FMODE_WRITE) { + hal2_stop_dac(s); + s->dma_dac.ready = 0; + hal2_set_dac_rate(s, val); + } + } + return put_user((file->f_mode & FMODE_READ) ? s->adcrate : s->dacrate, (int *)arg); + + case SNDCTL_DSP_STEREO: + get_user_ret(val, (int *)arg, -EFAULT); + if (file->f_mode & FMODE_READ) { + hal2_stop_adc(s); + s->dma_adc.ready = 0; + spin_lock_irqsave(&s->lock, flags); + if (val) { + ireg_setmask16(H2I_ADC_C1, + H2I_ADC_C1_DATAT_SHIFT, + H2I_ADC_C1_DATAT_M, 2); + s->dma_adc.stereo = 1; + } else { + ireg_setmask16(H2I_ADC_C1, + H2I_ADC_C1_DATAT_SHIFT, + H2I_ADC_C1_DATAT_M, 1); + s->dma_adc.stereo = 0; + } + spin_unlock_irqrestore(&s->lock, flags); + } + if (file->f_mode & FMODE_WRITE) { + hal2_stop_dac(s); + s->dma_dac.ready = 0; + spin_lock_irqsave(&s->lock, flags); + if (val) { + ireg_setmask16(H2I_DAC_C1, + H2I_DAC_C1_DATAT_SHIFT, + H2I_DAC_C1_DATAT_M, 2); + s->dma_dac.stereo = 1; + } else { + ireg_setmask16(H2I_DAC_C1, + H2I_DAC_C1_DATAT_SHIFT, + H2I_DAC_C1_DATAT_M, 1); + s->dma_dac.stereo = 0; + } + spin_unlock_irqrestore(&s->lock, flags); + } + return 0; + + case SNDCTL_DSP_CHANNELS: + get_user_ret(val, (int *)arg, -EFAULT); + if (val != 0) { + if (file->f_mode & FMODE_READ) { + hal2_stop_adc(s); + s->dma_adc.ready = 0; + spin_lock_irqsave(&s->lock, flags); + if (val >= 2) { + ireg_setmask16(H2I_ADC_C1, + H2I_ADC_C1_DATAT_SHIFT, + H2I_ADC_C1_DATAT_M, 2); + s->dma_dac.stereo = 1; + } else { + ireg_setmask16(H2I_ADC_C1, + H2I_ADC_C1_DATAT_SHIFT, + H2I_ADC_C1_DATAT_M, 1); + s->dma_adc.stereo = 0; + } + spin_unlock_irqrestore(&s->lock, flags); + } + if (file->f_mode & FMODE_WRITE) { + hal2_stop_dac(s); + s->dma_dac.ready = 0; + spin_lock_irqsave(&s->lock, flags); + if (val >= 2) { + ireg_setmask16(H2I_DAC_C1, + H2I_DAC_C1_DATAT_SHIFT, + H2I_DAC_C1_DATAT_M, 2); + s->dma_dac.stereo = 1; + } else { + ireg_setmask16(H2I_DAC_C1, + H2I_DAC_C1_DATAT_SHIFT, + H2I_DAC_C1_DATAT_M, 1); + s->dma_dac.stereo = 0; + } + spin_unlock_irqrestore(&s->lock, flags); + } + } + return put_user(s->dma_dac.stereo ? 2 : 1, (int *)arg); + + case SNDCTL_DSP_GETFMTS: /* Returns a mask */ + return put_user(AFMT_S16_BE, (int *)arg); + + case SNDCTL_DSP_SETFMT: /* Maybe Little endian too */ + return put_user(AFMT_S16_BE, (int *)arg); + + case SNDCTL_DSP_POST: + return 0; + + case SNDCTL_DSP_GETTRIGGER: + val = 0; + if (file->f_mode & FMODE_READ && s->dma_adc.port_en) + val |= PCM_ENABLE_INPUT; + if (file->f_mode & FMODE_WRITE && s->dma_dac.port_en) + val |= PCM_ENABLE_OUTPUT; + return put_user(val, (int *)arg); + + case SNDCTL_DSP_SETTRIGGER: + get_user_ret(val, (int *)arg, -EFAULT); + if (file->f_mode & FMODE_READ) { + if (val & PCM_ENABLE_INPUT) { + if (!s->dma_adc.ready && (ret = hal2_prog_dmabuf_adc(s))) + return ret; + hal2_start_adc(s); + } else + hal2_stop_adc(s); + } + if (file->f_mode & FMODE_WRITE) { + if (val & PCM_ENABLE_OUTPUT) { + if (!s->dma_dac.ready && (ret = hal2_prog_dmabuf_dac(s))) + return ret; + hal2_start_dac(s); + } else + hal2_stop_dac(s); + } + return 0; + + case SNDCTL_DSP_GETOSPACE: + if (!(file->f_mode & FMODE_WRITE)) + return -EINVAL; + if (!s->dma_dac.port_en && (val = hal2_prog_dmabuf_dac(s)) != 0) + return val; + spin_lock_irqsave(&s->lock, flags); + hal2_update_ptr(s); + abinfo.fragsize = s->dma_dac.fragsize; + abinfo.bytes = s->dma_dac.dmasize - s->dma_dac.count; + abinfo.fragstotal = s->dma_dac.numfrag; + abinfo.fragments = abinfo.bytes >> s->dma_dac.fragshift; + spin_unlock_irqrestore(&s->lock, flags); + return copy_to_user((void *)arg, &abinfo, sizeof(abinfo)) ? -EFAULT : 0; + + case SNDCTL_DSP_GETISPACE: + if (!(file->f_mode & FMODE_READ)) + return -EINVAL; + if (!(s->dma_adc.port_en) && (val = hal2_prog_dmabuf_adc(s)) != 0) + return val; + spin_lock_irqsave(&s->lock, flags); + hal2_update_ptr(s); + abinfo.fragsize = s->dma_adc.fragsize; + abinfo.bytes = s->dma_adc.count; + abinfo.fragstotal = s->dma_adc.numfrag; + abinfo.fragments = abinfo.bytes >> s->dma_adc.fragshift; + spin_unlock_irqrestore(&s->lock, flags); + 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); + hal2_update_ptr(s); + val = s->dma_dac.count; + spin_unlock_irqrestore(&s->lock, flags); + return put_user(val, (int *)arg); + + case SNDCTL_DSP_GETIPTR: + if (!(file->f_mode & FMODE_READ)) + return -EINVAL; + spin_lock_irqsave(&s->lock, flags); + hal2_update_ptr(s); + cinfo.bytes = s->dma_adc.total_bytes; + cinfo.blocks = s->dma_adc.total_bytes >> s->dma_adc.fragshift; + cinfo.ptr = s->dma_adc.hwptr; + if (s->dma_adc.mapped) + s->dma_adc.count &= s->dma_adc.fragsize-1; + spin_unlock_irqrestore(&s->lock, flags); + return copy_to_user((void *)arg, &cinfo, sizeof(cinfo)); + + case SNDCTL_DSP_GETOPTR: + if (!(file->f_mode & FMODE_WRITE)) + return -EINVAL; + spin_lock_irqsave(&s->lock, flags); + hal2_update_ptr(s); + cinfo.bytes = s->dma_dac.total_bytes; + cinfo.blocks = s->dma_dac.total_bytes >> s->dma_dac.fragshift; + cinfo.ptr = s->dma_dac.hwptr; + if (s->dma_dac.mapped) + s->dma_dac.count &= s->dma_dac.fragsize-1; + spin_unlock_irqrestore(&s->lock, flags); + return copy_to_user((void *)arg, &cinfo, sizeof(cinfo)); + + case SNDCTL_DSP_GETBLKSIZE: + if (file->f_mode & FMODE_WRITE) { + if ((val = hal2_prog_dmabuf_dac(s))) + return val; + return put_user(s->dma_dac.fragsize, (int *)arg); + } + if ((val = hal2_prog_dmabuf_adc(s))) + return val; + return put_user(s->dma_adc.fragsize, (int *)arg); + + case SNDCTL_DSP_SETFRAGMENT: + get_user_ret(val, (int *)arg, -EFAULT); + if (file->f_mode & FMODE_READ) { + 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 (file->f_mode & FMODE_WRITE) { + 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; + } + 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; + get_user_ret(val, (int *)arg, -EFAULT); + if (val != 1 && val != 2 && val != 4) + return -EINVAL; + if (file->f_mode & FMODE_READ) + s->dma_adc.subdivision = val; + if (file->f_mode & FMODE_WRITE) + s->dma_dac.subdivision = val; + return 0; + + case SOUND_PCM_WRITE_FILTER: + case SNDCTL_DSP_SETSYNCRO: + case SOUND_PCM_READ_RATE: + case SOUND_PCM_READ_CHANNELS: + case SOUND_PCM_READ_BITS: + case SOUND_PCM_READ_FILTER: + return -EINVAL; + + } + return -EINVAL; +} + +static int hal2_open(struct inode *inode, struct file *file) +{ + struct hal2_state *s = dev; + + if (!s) + return -ENODEV; + file->private_data = s; + /* wait for device to become free */ + down(&s->open_sem); + while (s->open_mode & file->f_mode) { + if (file->f_flags & O_NONBLOCK) { + up(&s->open_sem); + return -EBUSY; + } + up(&s->open_sem); + interruptible_sleep_on(&s->open_wait); + if (signal_pending(current)) + return -ERESTARTSYS; + down(&s->open_sem); + } + if (file->f_mode & FMODE_READ) { + s->dma_adc.ossfragshift = s->dma_adc.ossmaxfrags = s->dma_adc.subdivision = 0; + hal2_set_adc_rate(s, 8000); + } + if (file->f_mode & FMODE_WRITE) { + s->dma_dac.ossfragshift = s->dma_dac.ossmaxfrags = s->dma_dac.subdivision = 0; + hal2_set_dac_rate(s, 8000); + } + s->open_mode |= file->f_mode & (FMODE_READ | FMODE_WRITE); + up(&s->open_sem); + MOD_INC_USE_COUNT; + return 0; +} + +static int hal2_release(struct inode *inode, struct file *file) +{ + struct hal2_state *s = (struct hal2_state *)file->private_data; + + if (!s) + return -ENODEV; + if (file->f_mode & FMODE_WRITE) + hal2_drain_dac(s, file->f_flags & O_NONBLOCK); + down(&s->open_sem); + if (file->f_flags & FMODE_WRITE) { + hal2_stop_dac(s); + hal2_dealloc_dmabuf(&s->dma_dac); + } + if (file->f_flags & FMODE_READ) { + hal2_stop_adc(s); + hal2_dealloc_dmabuf(&s->dma_adc); + } + s->open_mode &= (~file->f_mode) & (FMODE_READ|FMODE_WRITE); + up(&s->open_sem); + wake_up(&s->open_wait); + MOD_DEC_USE_COUNT; + return 0; +} + +static struct file_operations hal2_audio_fops = { + NULL, /* hal2_llseek */ + hal2_read, + hal2_write, + NULL, /* hal2_readdir */ + hal2_poll, + hal2_ioctl, + hal2_mmap, + hal2_open, + NULL, /* hal2_flush */ + hal2_release, + NULL, /* hal2_fsync */ + NULL, /* hal2_fasync */ + NULL, /* hal2_check_media_change */ + NULL, /* hal2_revalidate */ + NULL, /* hal2_lock */ +}; + +/* ----------------------------------------------------------------------- */ + +static void hal2_reset(void) +{ + printk("resetting global isr:%04hx\n", h2_ctrl->isr); +#if 0 + /* try to leave the card in the bootup state so that the mixer stuff + * isn't gone */ + h2_ctrl->isr = 0; /* reset the card */ +#endif + printk("reset done isr:%04hx\n", h2_ctrl->isr); + h2_ctrl->isr = H2_ISR_GLOBAL_RESET_N | H2_ISR_CODEC_RESET_N; + printk("reactivation done isr:%04hx\n", h2_ctrl->isr); +} + +static int hal2_probe(void) +{ + unsigned short board, major, minor; + + unsigned long tmp; + + hal2_reset(); + + if (h2_ctrl->rev & H2_REV_AUDIO_PRESENT) { + + printk("hal2: there was no device?\n"); + return -ENODEV; + } + + board = (h2_ctrl->rev & H2_REV_BOARD_M) >> 12; + major = (h2_ctrl->rev & H2_REV_MAJOR_CHIP_M) >> 4; + minor = (h2_ctrl->rev & H2_REV_MINOR_CHIP_M); + + printk("SGI H2 Processor, Revision %i.%i.%i\n", + board, major, minor); + + if (board != 4 || major != 1 || minor != 0) { + printk("hal2: Other revision than 4.1.0 detected\n"); + printk("hal2: Your card is probably not supported\n"); + } + +#ifdef DEBUG + printk("hal2: probing card\n"); +#endif + + /* check that the indirect registers are working by writing some bogus + * stuff and then reading it back */ + + ireg_write16(H2I_DAC_C1, 0x4084); /* 16 bit register */ + ireg_write32(H2I_BRES2_C2, 0x20C0084); /* 32 bit register */ + +#ifdef DEBUG + printk("hal2: write done\n"); +#endif + + if ((tmp = ireg_read16(H2I_DAC_C1)) != 0x4084) { + printk("hal2: Didn't pass register check #1 (%04lx)\n", tmp); + return -ENODEV; + } + if ((tmp = ireg_read32(H2I_BRES2_C2)) != 0x20C0084) { + printk("hal2: Didn't pass register check #2 (%08lx)\n", tmp); + return -ENODEV; + } + +#ifdef DEBUG + printk("hal2: read done\n"); +#endif + printk("hal2: card found\n"); + + return 0; +} + +static int hal2_init(void) +{ + static int initialized = 0; + + if (initialized) { + printk("hal2: already initialized?\n"); + return 0; + } + + if (!dev) { +#ifdef DEBUG + printk("hal2: allocating hal2 device pointer\n"); +#endif + dev = kmalloc(sizeof(struct hal2_state), GFP_KERNEL); + if (!dev) + return -ENOMEM; + memset(dev, 0, sizeof(struct hal2_state)); + } + +#ifdef DEBUG + printk("hal2: resetting chip\n"); +#endif + hal2_reset(); + + /* setup indigo codec mode */ + +#ifdef DEBUG + printk("hal2: init done\n"); +#endif + + initialized = 1; + + return 0; +} + + +#ifdef MODULE +__initfunc(int init_module(void)) +#else +__initfunc(int init_hal2(void)) +#endif +{ + struct hal2_state *s; + int err; + + err = hal2_probe(); + if (err) + return err; + + err = hal2_init(); + if (err) + return err; + + s = dev; + + memset(s, 0, sizeof(struct hal2_state)); + init_waitqueue(&s->dma_adc.wait); + init_waitqueue(&s->dma_dac.wait); + init_waitqueue(&s->open_wait); + s->open_sem = MUTEX; + + /* Indigo CODEC mode (!QUAD) */ + h2_ctrl->isr &= ~H2_ISR_QUAD_MODE; + + s->irq = 12; /* wild guess! */ + err = request_irq(s->irq, hal2_interrupt, SA_INTERRUPT, "hal2", s); + if (err) { + printk(KERN_ERR "hal2: irq %u in use\n", s->irq); + return err; + } + s->dev_audio = register_sound_dsp(&hal2_audio_fops); + if (s->dev_audio < 0) + printk(KERN_ERR "hal2: cannot register misc device\n"); + + hal2_set_adc_rate(s, 22050); + hal2_set_dac_rate(s, 22050); + + return 0; +} + +#ifdef MODULE + +void cleanup_module(void) +{ + struct hal2_state *s = dev; + + synchronize_irq(); + free_irq(s->irq, s); + unregister_sound_dsp(s->dev_audio); + kfree_s(s, sizeof(struct hal2_state)); + printk(KERN_INFO "hal2: unloading\n"); +} + +#endif |