+++ /dev/null
-/*
- * Driver for A2 audio system used in SGI machines
- * Copyright (c) 2001, 2002, 2003 Ladislav Michl <ladis@linux-mips.org>
- *
- * 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
- *
- */
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/sched.h>
-#include <linux/init.h>
-#include <linux/slab.h>
-#include <linux/poll.h>
-#include <linux/interrupt.h>
-#include <linux/dma-mapping.h>
-#include <linux/sound.h>
-#include <linux/soundcard.h>
-#include <linux/mutex.h>
-
-
-#include <asm/io.h>
-#include <asm/sgi/hpc3.h>
-#include <asm/sgi/ip22.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
-
-/*
- * Before touching these look how it works. It is a bit unusual I know,
- * but it helps to keep things simple. This driver is considered complete
- * and I won't add any new features although hardware has many cool
- * capabilities.
- * (Historical note: HAL2 driver was first written by Ulf Carlsson - ALSA
- * 0.3 running with 2.2.x kernel. Then ALSA changed completely and it
- * seemed easier to me to write OSS driver from scratch - this one. Now
- * when ALSA is official part of 2.6 kernel it's time to write ALSA driver
- * using (hopefully) final version of ALSA interface)
- */
-#define H2_BLOCK_SIZE 1024
-#define H2_ADC_BUFSIZE 8192
-#define H2_DAC_BUFSIZE 16834
-
-struct hal2_pbus {
- struct hpc3_pbus_dmacregs *pbus;
- int pbusnr;
- unsigned int ctrl; /* Current state of pbus->pbdma_ctrl */
-};
-
-struct hal2_desc {
- struct hpc_dma_desc desc;
- u32 cnt; /* don't touch, it is also padding */
-};
-
-struct hal2_codec {
- unsigned char *buffer;
- struct hal2_desc *desc;
- int desc_count;
- int tail, head; /* tail index, head index */
- struct hal2_pbus pbus;
- unsigned int format; /* Audio data format */
- int voices; /* mono/stereo */
- unsigned int sample_rate;
- unsigned int master; /* Master frequency */
- unsigned short mod; /* MOD value */
- unsigned short inc; /* INC value */
-
- wait_queue_head_t dma_wait;
- spinlock_t lock;
- struct mutex sem;
-
- int usecount; /* recording and playback are
- * independent */
-};
-
-#define H2_MIX_OUTPUT_ATT 0
-#define H2_MIX_INPUT_GAIN 1
-#define H2_MIXERS 2
-struct hal2_mixer {
- int modcnt;
- unsigned int master;
- unsigned int volume[H2_MIXERS];
-};
-
-struct hal2_card {
- int dev_dsp; /* audio device */
- int dev_mixer; /* mixer device */
- int dev_midi; /* midi device */
-
- struct hal2_ctl_regs *ctl_regs; /* HAL2 ctl registers */
- struct hal2_aes_regs *aes_regs; /* HAL2 aes registers */
- struct hal2_vol_regs *vol_regs; /* HAL2 vol registers */
- struct hal2_syn_regs *syn_regs; /* HAL2 syn registers */
-
- struct hal2_codec dac;
- struct hal2_codec adc;
- struct hal2_mixer mixer;
-};
-
-#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";
-
-/*
- * 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 struct hal2_card* 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(struct hal2_card *hal2, u16 val)
-{
- hal2->ctl_regs->isr = val;
-}
-
-static inline u16 hal2_isr_look(struct hal2_card *hal2)
-{
- return hal2->ctl_regs->isr;
-}
-
-static inline u16 hal2_rev_look(struct hal2_card *hal2)
-{
- return hal2->ctl_regs->rev;
-}
-
-#ifdef HAL2_DUMP_REGS
-static u16 hal2_i_look16(struct hal2_card *hal2, u16 addr)
-{
- struct hal2_ctl_regs *regs = hal2->ctl_regs;
-
- regs->iar = H2_READ_ADDR(addr);
- H2_INDIRECT_WAIT(regs);
- return regs->idr0;
-}
-#endif
-
-static u32 hal2_i_look32(struct hal2_card *hal2, u16 addr)
-{
- u32 ret;
- struct hal2_ctl_regs *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(struct hal2_card *hal2, u16 addr, u16 val)
-{
- struct hal2_ctl_regs *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(struct hal2_card *hal2, u16 addr, u32 val)
-{
- struct hal2_ctl_regs *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(struct hal2_card *hal2, u16 addr, u16 bit)
-{
- struct hal2_ctl_regs *regs = hal2->ctl_regs;
-
- regs->iar = H2_READ_ADDR(addr);
- H2_INDIRECT_WAIT(regs);
- regs->idr0 = (regs->idr0 & 0xffff) | 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(struct hal2_card *hal2, u16 addr, u32 bit)
-{
- u32 tmp;
- struct hal2_ctl_regs *regs = hal2->ctl_regs;
-
- regs->iar = H2_READ_ADDR(addr);
- H2_INDIRECT_WAIT(regs);
- tmp = (regs->idr0 & 0xffff) | (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(struct hal2_card *hal2, u16 addr, u16 bit)
-{
- struct hal2_ctl_regs *regs = hal2->ctl_regs;
-
- regs->iar = H2_READ_ADDR(addr);
- H2_INDIRECT_WAIT(regs);
- regs->idr0 = (regs->idr0 & 0xffff) & ~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(struct hal2_card *hal2, u16 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 & 0xffff) | (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_DUMP_REGS
-static void hal2_dump_regs(struct hal2_card *hal2)
-{
- DEBUG("isr: %08hx ", hal2_isr_look(hal2));
- DEBUG("rev: %08hx\n", hal2_rev_look(hal2));
- DEBUG("relay: %04hx\n", hal2_i_look16(hal2, H2I_RELAY_C));
- DEBUG("port en: %04hx ", hal2_i_look16(hal2, H2I_DMA_PORT_EN));
- DEBUG("dma end: %04hx ", hal2_i_look16(hal2, H2I_DMA_END));
- DEBUG("dma drv: %04hx\n", hal2_i_look16(hal2, H2I_DMA_DRV));
- DEBUG("syn ctl: %04hx ", hal2_i_look16(hal2, H2I_SYNTH_C));
- DEBUG("aesrx ctl: %04hx ", hal2_i_look16(hal2, H2I_AESRX_C));
- DEBUG("aestx ctl: %04hx ", hal2_i_look16(hal2, H2I_AESTX_C));
- DEBUG("dac ctl1: %04hx ", hal2_i_look16(hal2, H2I_ADC_C1));
- DEBUG("dac ctl2: %08x ", hal2_i_look32(hal2, H2I_ADC_C2));
- DEBUG("adc ctl1: %04hx ", hal2_i_look16(hal2, H2I_DAC_C1));
- DEBUG("adc ctl2: %08x ", hal2_i_look32(hal2, H2I_DAC_C2));
- DEBUG("syn map: %04hx\n", hal2_i_look16(hal2, H2I_SYNTH_MAP_C));
- DEBUG("bres1 ctl1: %04hx ", hal2_i_look16(hal2, H2I_BRES1_C1));
- DEBUG("bres1 ctl2: %04x ", hal2_i_look32(hal2, H2I_BRES1_C2));
- DEBUG("bres2 ctl1: %04hx ", hal2_i_look16(hal2, H2I_BRES2_C1));
- DEBUG("bres2 ctl2: %04x ", hal2_i_look32(hal2, H2I_BRES2_C2));
- DEBUG("bres3 ctl1: %04hx ", hal2_i_look16(hal2, H2I_BRES3_C1));
- DEBUG("bres3 ctl2: %04x\n", hal2_i_look32(hal2, H2I_BRES3_C2));
-}
-#endif
-
-static struct hal2_card* 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 struct hal2_card* 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_inc_head(struct hal2_codec *codec)
-{
- codec->head++;
- if (codec->head == codec->desc_count)
- codec->head = 0;
-}
-
-static void hal2_inc_tail(struct hal2_codec *codec)
-{
- codec->tail++;
- if (codec->tail == codec->desc_count)
- codec->tail = 0;
-}
-
-static void hal2_dac_interrupt(struct hal2_codec *dac)
-{
- int running;
-
- spin_lock(&dac->lock);
- /* if tail buffer contains zero samples DMA stream was already
- * stopped */
- running = dac->desc[dac->tail].cnt;
- dac->desc[dac->tail].cnt = 0;
- dac->desc[dac->tail].desc.cntinfo = HPCDMA_XIE | HPCDMA_EOX;
- /* we just proccessed empty buffer, don't update tail pointer */
- if (running)
- hal2_inc_tail(dac);
- spin_unlock(&dac->lock);
-
- wake_up(&dac->dma_wait);
-}
-
-static void hal2_adc_interrupt(struct hal2_codec *adc)
-{
- int running;
-
- spin_lock(&adc->lock);
- /* if head buffer contains nonzero samples DMA stream was already
- * stopped */
- running = !adc->desc[adc->head].cnt;
- adc->desc[adc->head].cnt = H2_BLOCK_SIZE;
- adc->desc[adc->head].desc.cntinfo = HPCDMA_XIE | HPCDMA_EOR;
- /* we just proccessed empty buffer, don't update head pointer */
- if (running)
- hal2_inc_head(adc);
- spin_unlock(&adc->lock);
-
- wake_up(&adc->dma_wait);
-}
-
-static irqreturn_t hal2_interrupt(int irq, void *dev_id)
-{
- struct hal2_card *hal2 = dev_id;
- irqreturn_t ret = IRQ_NONE;
-
- /* decide what caused this interrupt */
- if (hal2->dac.pbus.pbus->pbdma_ctrl & HPC3_PDMACTRL_INT) {
- hal2_dac_interrupt(&hal2->dac);
- ret = IRQ_HANDLED;
- }
- if (hal2->adc.pbus.pbus->pbdma_ctrl & HPC3_PDMACTRL_INT) {
- hal2_adc_interrupt(&hal2->adc);
- ret = IRQ_HANDLED;
- }
- return ret;
-}
-
-static int hal2_compute_rate(struct hal2_codec *codec, unsigned int rate)
-{
- unsigned short mod;
-
- DEBUG("rate: %d\n", rate);
-
- if (rate < 4000) rate = 4000;
- else if (rate > 48000) rate = 48000;
-
- if (44100 % rate < 48000 % rate) {
- mod = 4 * 44100 / rate;
- codec->master = 44100;
- } else {
- mod = 4 * 48000 / rate;
- codec->master = 48000;
- }
-
- codec->inc = 4;
- codec->mod = mod;
- rate = 4 * codec->master / mod;
-
- DEBUG("real_rate: %d\n", rate);
-
- return rate;
-}
-
-static void hal2_set_dac_rate(struct hal2_card *hal2)
-{
- unsigned int master = hal2->dac.master;
- int inc = hal2->dac.inc;
- int mod = hal2->dac.mod;
-
- DEBUG("master: %d inc: %d mod: %d\n", master, inc, mod);
-
- hal2_i_write16(hal2, H2I_BRES1_C1, (master == 44100) ? 1 : 0);
- hal2_i_write32(hal2, H2I_BRES1_C2, ((0xffff & (inc - mod - 1)) << 16) | inc);
-}
-
-static void hal2_set_adc_rate(struct hal2_card *hal2)
-{
- unsigned int master = hal2->adc.master;
- int inc = hal2->adc.inc;
- int mod = hal2->adc.mod;
-
- DEBUG("master: %d inc: %d mod: %d\n", master, inc, mod);
-
- hal2_i_write16(hal2, H2I_BRES2_C1, (master == 44100) ? 1 : 0);
- hal2_i_write32(hal2, H2I_BRES2_C2, ((0xffff & (inc - mod - 1)) << 16) | inc);
-}
-
-static void hal2_setup_dac(struct hal2_card *hal2)
-{
- unsigned int fifobeg, fifoend, highwater, sample_size;
- struct hal2_pbus *pbus = &hal2->dac.pbus;
-
- DEBUG("hal2_setup_dac\n");
-
- /* 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) |
- (hal2->dac.format & AFMT_S16_LE ? HPC3_PDMACTRL_SEL : 0);
- /* 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);
- /* Setup the HAL2 for playback */
- hal2_set_dac_rate(hal2);
- /* 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));
- /* 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(struct hal2_card *hal2)
-{
- unsigned int fifobeg, fifoend, highwater, sample_size;
- struct hal2_pbus *pbus = &hal2->adc.pbus;
-
- DEBUG("hal2_setup_adc\n");
-
- 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) |
- (hal2->adc.format & AFMT_S16_LE ? HPC3_PDMACTRL_SEL : 0);
- pbus->pbus->pbdma_ctrl = HPC3_PDMACTRL_LD;
- hal2_i_clearbit16(hal2, H2I_DMA_PORT_EN, H2I_DMA_PORT_EN_CODECR);
- /* Setup the HAL2 for record */
- hal2_set_adc_rate(hal2);
- /* 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));
- /* 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 dma_addr_t hal2_desc_addr(struct hal2_codec *codec, int i)
-{
- if (--i < 0)
- i = codec->desc_count - 1;
- return codec->desc[i].desc.pnext;
-}
-
-static void hal2_start_dac(struct hal2_card *hal2)
-{
- struct hal2_codec *dac = &hal2->dac;
- struct hal2_pbus *pbus = &dac->pbus;
-
- pbus->pbus->pbdma_dptr = hal2_desc_addr(dac, dac->tail);
- pbus->pbus->pbdma_ctrl = pbus->ctrl | HPC3_PDMACTRL_ACT;
- /* enable DAC */
- hal2_i_setbit16(hal2, H2I_DMA_PORT_EN, H2I_DMA_PORT_EN_CODECTX);
-}
-
-static void hal2_start_adc(struct hal2_card *hal2)
-{
- struct hal2_codec *adc = &hal2->adc;
- struct hal2_pbus *pbus = &adc->pbus;
-
- pbus->pbus->pbdma_dptr = hal2_desc_addr(adc, adc->head);
- pbus->pbus->pbdma_ctrl = pbus->ctrl | HPC3_PDMACTRL_ACT;
- /* enable ADC */
- hal2_i_setbit16(hal2, H2I_DMA_PORT_EN, H2I_DMA_PORT_EN_CODECR);
-}
-
-static inline void hal2_stop_dac(struct hal2_card *hal2)
-{
- hal2->dac.pbus.pbus->pbdma_ctrl = HPC3_PDMACTRL_LD;
- /* The HAL2 itself may remain enabled safely */
-}
-
-static inline void hal2_stop_adc(struct hal2_card *hal2)
-{
- hal2->adc.pbus.pbus->pbdma_ctrl = HPC3_PDMACTRL_LD;
-}
-
-static int hal2_alloc_dmabuf(struct hal2_codec *codec, int size,
- int count, int cntinfo, int dir)
-{
- struct hal2_desc *desc, *dma_addr;
- int i;
-
- DEBUG("allocating %dk DMA buffer.\n", size / 1024);
-
- codec->buffer = (unsigned char *)__get_free_pages(GFP_KERNEL | GFP_DMA,
- get_order(size));
- if (!codec->buffer)
- return -ENOMEM;
- desc = dma_alloc_coherent(NULL, count * sizeof(struct hal2_desc),
- (dma_addr_t *)&dma_addr, GFP_KERNEL);
- if (!desc) {
- free_pages((unsigned long)codec->buffer, get_order(size));
- return -ENOMEM;
- }
- codec->desc = desc;
- for (i = 0; i < count; i++) {
- desc->desc.pbuf = dma_map_single(NULL,
- (void *)(codec->buffer + i * H2_BLOCK_SIZE),
- H2_BLOCK_SIZE, dir);
- desc->desc.cntinfo = cntinfo;
- desc->desc.pnext = (i == count - 1) ?
- (u32)dma_addr : (u32)(dma_addr + i + 1);
- desc->cnt = 0;
- desc++;
- }
- codec->desc_count = count;
- codec->head = codec->tail = 0;
- return 0;
-}
-
-static int hal2_alloc_dac_dmabuf(struct hal2_codec *codec)
-{
- return hal2_alloc_dmabuf(codec, H2_DAC_BUFSIZE,
- H2_DAC_BUFSIZE / H2_BLOCK_SIZE,
- HPCDMA_XIE | HPCDMA_EOX,
- DMA_TO_DEVICE);
-}
-
-static int hal2_alloc_adc_dmabuf(struct hal2_codec *codec)
-{
- return hal2_alloc_dmabuf(codec, H2_ADC_BUFSIZE,
- H2_ADC_BUFSIZE / H2_BLOCK_SIZE,
- HPCDMA_XIE | H2_BLOCK_SIZE,
- DMA_TO_DEVICE);
-}
-
-static void hal2_free_dmabuf(struct hal2_codec *codec, int size, int dir)
-{
- dma_addr_t dma_addr;
- int i;
-
- dma_addr = codec->desc[codec->desc_count - 1].desc.pnext;
- for (i = 0; i < codec->desc_count; i++)
- dma_unmap_single(NULL, codec->desc[i].desc.pbuf,
- H2_BLOCK_SIZE, dir);
- dma_free_coherent(NULL, codec->desc_count * sizeof(struct hal2_desc),
- (void *)codec->desc, dma_addr);
- free_pages((unsigned long)codec->buffer, get_order(size));
-}
-
-static void hal2_free_dac_dmabuf(struct hal2_codec *codec)
-{
- return hal2_free_dmabuf(codec, H2_DAC_BUFSIZE, DMA_TO_DEVICE);
-}
-
-static void hal2_free_adc_dmabuf(struct hal2_codec *codec)
-{
- return hal2_free_dmabuf(codec, H2_ADC_BUFSIZE, DMA_FROM_DEVICE);
-}
-
-/*
- * 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(struct hal2_card *hal2, char *buffer, int count)
-{
- unsigned long flags;
- int size, ret = 0;
- unsigned char *buf;
- struct hal2_desc *tail;
- struct hal2_codec *adc = &hal2->adc;
-
- DEBUG("getting %d bytes ", count);
-
- spin_lock_irqsave(&adc->lock, flags);
- tail = &adc->desc[adc->tail];
- /* enable DMA stream if there are no data */
- if (!tail->cnt && !(adc->pbus.pbus->pbdma_ctrl & HPC3_PDMACTRL_ISACT))
- hal2_start_adc(hal2);
- while (tail->cnt > 0 && count > 0) {
- size = min((int)tail->cnt, count);
- buf = &adc->buffer[(adc->tail + 1) * H2_BLOCK_SIZE - tail->cnt];
- spin_unlock_irqrestore(&adc->lock, flags);
- dma_sync_single(NULL, tail->desc.pbuf, size, DMA_FROM_DEVICE);
- if (copy_to_user(buffer, buf, size)) {
- ret = -EFAULT;
- goto out;
- }
- spin_lock_irqsave(&adc->lock, flags);
- tail->cnt -= size;
- /* buffer is empty, update tail pointer */
- if (tail->cnt == 0) {
- tail->desc.cntinfo = HPCDMA_XIE | H2_BLOCK_SIZE;
- hal2_inc_tail(adc);
- tail = &adc->desc[adc->tail];
- /* 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(struct hal2_card *hal2, char *buffer, int count)
-{
- unsigned long flags;
- unsigned char *buf;
- int size, ret = 0;
- struct hal2_desc *head;
- struct hal2_codec *dac = &hal2->dac;
-
- DEBUG("adding %d bytes ", count);
-
- spin_lock_irqsave(&dac->lock, flags);
- head = &dac->desc[dac->head];
- while (head->cnt == 0 && count > 0) {
- size = min((int)H2_BLOCK_SIZE, count);
- buf = &dac->buffer[dac->head * H2_BLOCK_SIZE];
- spin_unlock_irqrestore(&dac->lock, flags);
- if (copy_from_user(buf, buffer, size)) {
- ret = -EFAULT;
- goto out;
- }
- dma_sync_single(NULL, head->desc.pbuf, size, DMA_TO_DEVICE);
- spin_lock_irqsave(&dac->lock, flags);
- head->desc.cntinfo = size | HPCDMA_XIE;
- head->cnt = size;
- buffer += size;
- ret += size;
- count -= size;
- hal2_inc_head(dac);
- head = &dac->desc[dac->head];
-
- 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(struct hal2_card *hal2, int is_dac)
-{
- int i;
- struct hal2_codec *codec = (is_dac) ? &hal2->dac : &hal2->adc;
-
- DEBUG("hal2_reset_pointer\n");
-
- for (i = 0; i < codec->desc_count; i++) {
- codec->desc[i].cnt = 0;
- codec->desc[i].desc.cntinfo = HPCDMA_XIE | (is_dac) ?
- HPCDMA_EOX : H2_BLOCK_SIZE;
- }
- codec->head = codec->tail = 0;
-}
-
-static int hal2_sync_dac(struct hal2_card *hal2)
-{
- DECLARE_WAITQUEUE(wait, current);
- struct hal2_codec *dac = &hal2->dac;
- int ret = 0;
- unsigned long flags;
- signed long timeout = 1000 * H2_BLOCK_SIZE * 2 * dac->voices *
- HZ / dac->sample_rate / 900;
-
- while (dac->pbus.pbus->pbdma_ctrl & HPC3_PDMACTRL_ISACT) {
- add_wait_queue(&dac->dma_wait, &wait);
- set_current_state(TASK_INTERRUPTIBLE);
- schedule_timeout(timeout);
- spin_lock_irqsave(&dac->lock, flags);
- if (dac->desc[dac->tail].cnt)
- ret = -ETIME;
- spin_unlock_irqrestore(&dac->lock, flags);
- if (signal_pending(current))
- ret = -ERESTARTSYS;
- if (ret) {
- hal2_stop_dac(hal2);
- hal2_reset_dac_pointer(hal2);
- }
- remove_wait_queue(&dac->dma_wait, &wait);
- }
-
- return ret;
-}
-
-static int hal2_write_mixer(struct hal2_card *hal2, int index, int vol)
-{
- unsigned int l, r, tmp;
-
- DEBUG_MIX("mixer %d write\n", 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,%d\n", l, r);
-
- if (r | l) {
- 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 %d\n", 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);
- break;
- case H2_MIX_INPUT_GAIN:
-
- DEBUG_MIX("input gain %d,%d\n", l, r);
-
- tmp = hal2_i_look32(hal2, H2I_ADC_C2);
- tmp &= ~(H2I_C2_L_GAIN_M | H2I_C2_R_GAIN_M);
-
- /* Gain control has four bits */
- l = 16 * l / 100;
- r = 16 * r / 100;
-
- DEBUG_MIX("left: %d, right %d\n", l, r);
-
- tmp |= (l << H2I_C2_L_GAIN_SHIFT) & H2I_C2_L_GAIN_M;
- tmp |= (r << H2I_C2_R_GAIN_SHIFT) & H2I_C2_R_GAIN_M;
- hal2_i_write32(hal2, H2I_ADC_C2, tmp);
-
- break;
- }
-
- return 0;
-}
-
-static void hal2_init_mixer(struct hal2_card *hal2)
-{
- int i;
-
- for (i = 0; i < SOUND_MIXER_NRDEVICES; i++)
- if (mixtable[i].avail)
- hal2->mixer.volume[mixtable[i].idx] = 100 | (100 << 8);
-
- /* disable attenuator */
- hal2_i_write32(hal2, H2I_DAC_C2, 0);
- /* set max input gain */
- hal2_i_write32(hal2, H2I_ADC_C2, H2I_C2_MUTE |
- (H2I_C2_L_GAIN_M << H2I_C2_L_GAIN_SHIFT) |
- (H2I_C2_R_GAIN_M << H2I_C2_R_GAIN_SHIFT));
- /* set max volume */
- hal2->mixer.master = 0xff;
- hal2->vol_regs->left = 0xff;
- hal2->vol_regs->right = 0xff;
-}
-
-/*
- * XXX: later i'll implement mixer for main volume which will be disabled
- * by default. enabling it users will be allowed to have master volume level
- * control on panel in their favourite X desktop
- */
-static void hal2_volume_control(int direction)
-{
- unsigned int master = hal2_card[0]->mixer.master;
- struct hal2_vol_regs *vol = hal2_card[0]->vol_regs;
-
- /* volume up */
- if (direction > 0 && master < 0xff)
- master++;
- /* volume down */
- else if (direction < 0 && master > 0)
- master--;
- /* TODO: mute/unmute */
- vol->left = master;
- vol->right = master;
- hal2_card[0]->mixer.master = master;
-}
-
-static int hal2_mixer_ioctl(struct hal2_card *hal2, unsigned int cmd,
- unsigned long arg)
-{
- int val;
-
- if (cmd == SOUND_MIXER_INFO) {
- mixer_info info;
-
- memset(&info, 0, sizeof(info));
- strlcpy(info.id, hal2str, sizeof(info.id));
- strlcpy(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;
-
- memset(&info, 0, sizeof(info));
- strlcpy(info.id, hal2str, sizeof(info.id));
- strlcpy(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)
-{
- struct hal2_card *hal2 = hal2_mixer_find_card(iminor(inode));
-
- if (hal2) {
- file->private_data = hal2;
- return nonseekable_open(inode, file);
- }
- 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((struct hal2_card *)file->private_data, cmd, arg);
-}
-
-static int hal2_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
-{
- int val;
- struct hal2_card *hal2 = (struct hal2_card *) 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: {
- audio_buf_info info;
- int i;
- unsigned long flags;
- struct hal2_codec *dac = &hal2->dac;
-
- if (!(file->f_mode & FMODE_WRITE))
- return -EINVAL;
- info.fragments = 0;
- spin_lock_irqsave(&dac->lock, flags);
- for (i = 0; i < dac->desc_count; i++)
- if (dac->desc[i].cnt == 0)
- info.fragments++;
- spin_unlock_irqrestore(&dac->lock, flags);
- info.fragstotal = dac->desc_count;
- info.fragsize = H2_BLOCK_SIZE;
- info.bytes = info.fragsize * info.fragments;
-
- return copy_to_user((void *)arg, &info, sizeof(info)) ? -EFAULT : 0;
- }
-
- case SNDCTL_DSP_GETISPACE: {
- audio_buf_info info;
- int i;
- unsigned long flags;
- struct hal2_codec *adc = &hal2->adc;
-
- if (!(file->f_mode & FMODE_READ))
- return -EINVAL;
- info.fragments = 0;
- info.bytes = 0;
- spin_lock_irqsave(&adc->lock, flags);
- for (i = 0; i < adc->desc_count; i++)
- if (adc->desc[i].cnt > 0) {
- info.fragments++;
- info.bytes += adc->desc[i].cnt;
- }
- spin_unlock_irqrestore(&adc->lock, flags);
- info.fragstotal = adc->desc_count;
- info.fragsize = H2_BLOCK_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_BLOCK_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:
- return put_user(16, (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;
- struct hal2_card *hal2 = (struct hal2_card *) file->private_data;
- struct hal2_codec *adc = &hal2->adc;
-
- if (!count)
- return 0;
- if (mutex_lock_interruptible(&adc->sem))
- return -EINTR;
- 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_BLOCK_SIZE *
- 2 * adc->voices * HZ / adc->sample_rate / 900;
- unsigned long flags;
- 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);
- schedule_timeout(timeout);
- spin_lock_irqsave(&adc->lock, flags);
- if (!adc->desc[adc->tail].cnt)
- err = -EAGAIN;
- spin_unlock_irqrestore(&adc->lock, flags);
- if (signal_pending(current))
- err = -ERESTARTSYS;
- remove_wait_queue(&adc->dma_wait, &wait);
- if (err < 0) {
- hal2_stop_adc(hal2);
- hal2_reset_adc_pointer(hal2);
- }
- }
- } while (count > 0 && err >= 0);
- }
- mutex_unlock(&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;
- struct hal2_card *hal2 = (struct hal2_card *) file->private_data;
- struct hal2_codec *dac = &hal2->dac;
-
- if (!count)
- return 0;
- if (mutex_lock_interruptible(&dac->sem))
- return -EINTR;
- 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_BLOCK_SIZE *
- 2 * dac->voices * HZ / dac->sample_rate / 900;
- unsigned long flags;
- 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);
- schedule_timeout(timeout);
- spin_lock_irqsave(&dac->lock, flags);
- if (dac->desc[dac->head].cnt)
- err = -EAGAIN;
- spin_unlock_irqrestore(&dac->lock, flags);
- if (signal_pending(current))
- err = -ERESTARTSYS;
- remove_wait_queue(&dac->dma_wait, &wait);
- if (err < 0) {
- hal2_stop_dac(hal2);
- hal2_reset_dac_pointer(hal2);
- }
- }
- } while (count > 0 && err >= 0);
- }
- mutex_unlock(&dac->sem);
-
- return err;
-}
-
-static unsigned int hal2_poll(struct file *file, struct poll_table_struct *wait)
-{
- unsigned long flags;
- unsigned int mask = 0;
- struct hal2_card *hal2 = (struct hal2_card *) file->private_data;
-
- if (file->f_mode & FMODE_READ) {
- struct hal2_codec *adc = &hal2->adc;
-
- poll_wait(file, &adc->dma_wait, wait);
- spin_lock_irqsave(&adc->lock, flags);
- if (adc->desc[adc->tail].cnt > 0)
- mask |= POLLIN;
- spin_unlock_irqrestore(&adc->lock, flags);
- }
-
- if (file->f_mode & FMODE_WRITE) {
- struct hal2_codec *dac = &hal2->dac;
-
- poll_wait(file, &dac->dma_wait, wait);
- spin_lock_irqsave(&dac->lock, flags);
- if (dac->desc[dac->head].cnt == 0)
- mask |= POLLOUT;
- spin_unlock_irqrestore(&dac->lock, flags);
- }
-
- return mask;
-}
-
-static int hal2_open(struct inode *inode, struct file *file)
-{
- int err;
- struct hal2_card *hal2 = hal2_dsp_find_card(iminor(inode));
-
- if (!hal2)
- return -ENODEV;
- file->private_data = hal2;
- if (file->f_mode & FMODE_READ) {
- struct hal2_codec *adc = &hal2->adc;
-
- if (adc->usecount)
- return -EBUSY;
- /* OSS spec wanted us to use 8 bit, 8 kHz mono by default,
- * but HAL2 can't do 8bit audio */
- adc->format = AFMT_S16_BE;
- adc->voices = 1;
- adc->sample_rate = hal2_compute_rate(adc, 8000);
- hal2_set_adc_rate(hal2);
- err = hal2_alloc_adc_dmabuf(adc);
- if (err)
- return err;
- hal2_setup_adc(hal2);
- adc->usecount++;
- }
- if (file->f_mode & FMODE_WRITE) {
- struct hal2_codec *dac = &hal2->dac;
-
- if (dac->usecount)
- return -EBUSY;
- dac->format = AFMT_S16_BE;
- dac->voices = 1;
- dac->sample_rate = hal2_compute_rate(dac, 8000);
- hal2_set_dac_rate(hal2);
- err = hal2_alloc_dac_dmabuf(dac);
- if (err)
- return err;
- hal2_setup_dac(hal2);
- dac->usecount++;
- }
-
- return nonseekable_open(inode, file);
-}
-
-static int hal2_release(struct inode *inode, struct file *file)
-{
- struct hal2_card *hal2 = (struct hal2_card *) file->private_data;
-
- if (file->f_mode & FMODE_READ) {
- struct hal2_codec *adc = &hal2->adc;
-
- mutex_lock(&adc->sem);
- hal2_stop_adc(hal2);
- hal2_free_adc_dmabuf(adc);
- adc->usecount--;
- mutex_unlock(&adc->sem);
- }
- if (file->f_mode & FMODE_WRITE) {
- struct hal2_codec *dac = &hal2->dac;
-
- mutex_lock(&dac->sem);
- hal2_sync_dac(hal2);
- hal2_free_dac_dmabuf(dac);
- dac->usecount--;
- mutex_unlock(&dac->sem);
- }
-
- return 0;
-}
-
-static const 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 const 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 void hal2_init_codec(struct hal2_codec *codec, struct hpc3_regs *hpc3,
- int index)
-{
- codec->pbus.pbusnr = index;
- codec->pbus.pbus = &hpc3->pbdma[index];
- init_waitqueue_head(&codec->dma_wait);
- mutex_init(&codec->sem);
- spin_lock_init(&codec->lock);
-}
-
-static int hal2_detect(struct hal2_card *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)
- 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(KERN_INFO "SGI HAL2 revision %i.%i.%i\n",
- board, major, minor);
-
- return 0;
-}
-
-static int hal2_init_card(struct hal2_card **phal2, struct hpc3_regs *hpc3)
-{
- int ret = 0;
- struct hal2_card *hal2;
-
- hal2 = kzalloc(sizeof(struct hal2_card), GFP_KERNEL);
- if (!hal2)
- return -ENOMEM;
-
- hal2->ctl_regs = (struct hal2_ctl_regs *)hpc3->pbus_extregs[0];
- hal2->aes_regs = (struct hal2_aes_regs *)hpc3->pbus_extregs[1];
- hal2->vol_regs = (struct hal2_vol_regs *)hpc3->pbus_extregs[2];
- hal2->syn_regs = (struct hal2_syn_regs *)hpc3->pbus_extregs[3];
-
- if (hal2_detect(hal2) < 0) {
- ret = -ENODEV;
- goto free_card;
- }
-
- hal2_init_codec(&hal2->dac, hpc3, 0);
- hal2_init_codec(&hal2->adc, hpc3, 1);
-
- /*
- * All DMA channel interfaces in HAL2 are designed to operate with
- * PBUS programmed for 2 cycles in D3, 2 cycles in D4 and 2 cycles
- * in D5. HAL2 is a 16-bit device which can accept both big and little
- * endian format. It assumes that even address bytes are on high
- * portion of PBUS (15:8) and assumes that HPC3 is programmed to
- * accept a live (unsynchronized) version of P_DREQ_N from HAL2.
- */
-#define HAL2_PBUS_DMACFG ((0 << HPC3_DMACFG_D3R_SHIFT) | \
- (2 << HPC3_DMACFG_D4R_SHIFT) | \
- (2 << HPC3_DMACFG_D5R_SHIFT) | \
- (0 << HPC3_DMACFG_D3W_SHIFT) | \
- (2 << HPC3_DMACFG_D4W_SHIFT) | \
- (2 << HPC3_DMACFG_D5W_SHIFT) | \
- HPC3_DMACFG_DS16 | \
- HPC3_DMACFG_EVENHI | \
- HPC3_DMACFG_RTIME | \
- (8 << HPC3_DMACFG_BURST_SHIFT) | \
- HPC3_DMACFG_DRQLIVE)
- /*
- * Ignore what's mentioned in the specification and write value which
- * works in The Real World (TM)
- */
- hpc3->pbus_dmacfg[hal2->dac.pbus.pbusnr][0] = 0x8208844;
- hpc3->pbus_dmacfg[hal2->adc.pbus.pbusnr][0] = 0x8208844;
-
- if (request_irq(SGI_HPCDMA_IRQ, hal2_interrupt, IRQF_SHARED,
- hal2str, hal2)) {
- printk(KERN_ERR "HAL2: Can't get irq %d\n", SGI_HPCDMA_IRQ);
- ret = -EAGAIN;
- goto free_card;
- }
-
- hal2->dev_dsp = register_sound_dsp(&hal2_audio_fops, -1);
- if (hal2->dev_dsp < 0) {
- ret = hal2->dev_dsp;
- goto free_irq;
- }
-
- hal2->dev_mixer = register_sound_mixer(&hal2_mixer_fops, -1);
- if (hal2->dev_mixer < 0) {
- ret = hal2->dev_mixer;
- goto unregister_dsp;
- }
-
- hal2_init_mixer(hal2);
-
- *phal2 = hal2;
- return 0;
-unregister_dsp:
- unregister_sound_dsp(hal2->dev_dsp);
-free_irq:
- free_irq(SGI_HPCDMA_IRQ, hal2);
-free_card:
- kfree(hal2);
-
- return ret;
-}
-
-extern void (*indy_volume_button)(int);
-
-/*
- * Assuming only one HAL2 card. Mail me if you ever meet machine with
- * more than one.
- */
-static int __init init_hal2(void)
-{
- int i, error;
-
- for (i = 0; i < MAXCARDS; i++)
- hal2_card[i] = NULL;
-
- error = hal2_init_card(&hal2_card[0], hpc3c0);
-
- /* let Indy's volume buttons work */
- if (!error && !ip22_is_fullhouse())
- indy_volume_button = hal2_volume_control;
-
- return error;
-
-}
-
-static void __exit exit_hal2(void)
-{
- int i;
-
- /* unregister volume butons callback function */
- indy_volume_button = NULL;
-
- for (i = 0; i < MAXCARDS; i++)
- if (hal2_card[i]) {
- free_irq(SGI_HPCDMA_IRQ, 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");
git://ftp.safe.ca / safe / jmp / linux-2.6 / commitdiff