diff options
Diffstat (limited to 'sound/oss/hal2.c')
| -rw-r--r-- | sound/oss/hal2.c | 1558 |
1 files changed, 0 insertions, 1558 deletions
diff --git a/sound/oss/hal2.c b/sound/oss/hal2.c deleted file mode 100644 index a94b9df489dc..000000000000 --- a/sound/oss/hal2.c +++ /dev/null @@ -1,1558 +0,0 @@ -/* - * 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"); |
