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0d3d8be84a
A platform_driver does not need to set an owner, it will be populated by the driver core. Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
936 lines
25 KiB
C
936 lines
25 KiB
C
/*
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* Driver for A2 audio system used in SGI machines
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* Copyright (c) 2008 Thomas Bogendoerfer <tsbogend@alpha.fanken.de>
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*
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* Based on OSS code from Ladislav Michl <ladis@linux-mips.org>, which
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* was based on code from Ulf Carlsson
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/dma-mapping.h>
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#include <linux/platform_device.h>
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#include <linux/io.h>
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#include <linux/slab.h>
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#include <linux/module.h>
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#include <asm/sgi/hpc3.h>
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#include <asm/sgi/ip22.h>
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#include <sound/core.h>
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#include <sound/control.h>
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#include <sound/pcm.h>
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#include <sound/pcm-indirect.h>
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#include <sound/initval.h>
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#include "hal2.h"
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static int index = SNDRV_DEFAULT_IDX1; /* Index 0-MAX */
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static char *id = SNDRV_DEFAULT_STR1; /* ID for this card */
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module_param(index, int, 0444);
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MODULE_PARM_DESC(index, "Index value for SGI HAL2 soundcard.");
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module_param(id, charp, 0444);
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MODULE_PARM_DESC(id, "ID string for SGI HAL2 soundcard.");
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MODULE_DESCRIPTION("ALSA driver for SGI HAL2 audio");
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MODULE_AUTHOR("Thomas Bogendoerfer");
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MODULE_LICENSE("GPL");
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#define H2_BLOCK_SIZE 1024
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#define H2_BUF_SIZE 16384
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struct hal2_pbus {
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struct hpc3_pbus_dmacregs *pbus;
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int pbusnr;
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unsigned int ctrl; /* Current state of pbus->pbdma_ctrl */
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};
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struct hal2_desc {
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struct hpc_dma_desc desc;
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u32 pad; /* padding */
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};
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struct hal2_codec {
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struct snd_pcm_indirect pcm_indirect;
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struct snd_pcm_substream *substream;
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unsigned char *buffer;
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dma_addr_t buffer_dma;
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struct hal2_desc *desc;
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dma_addr_t desc_dma;
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int desc_count;
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struct hal2_pbus pbus;
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int voices; /* mono/stereo */
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unsigned int sample_rate;
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unsigned int master; /* Master frequency */
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unsigned short mod; /* MOD value */
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unsigned short inc; /* INC value */
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};
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#define H2_MIX_OUTPUT_ATT 0
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#define H2_MIX_INPUT_GAIN 1
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struct snd_hal2 {
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struct snd_card *card;
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struct hal2_ctl_regs *ctl_regs; /* HAL2 ctl registers */
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struct hal2_aes_regs *aes_regs; /* HAL2 aes registers */
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struct hal2_vol_regs *vol_regs; /* HAL2 vol registers */
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struct hal2_syn_regs *syn_regs; /* HAL2 syn registers */
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struct hal2_codec dac;
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struct hal2_codec adc;
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};
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#define H2_INDIRECT_WAIT(regs) while (hal2_read(®s->isr) & H2_ISR_TSTATUS);
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#define H2_READ_ADDR(addr) (addr | (1<<7))
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#define H2_WRITE_ADDR(addr) (addr)
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static inline u32 hal2_read(u32 *reg)
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{
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return __raw_readl(reg);
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}
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static inline void hal2_write(u32 val, u32 *reg)
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{
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__raw_writel(val, reg);
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}
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static u32 hal2_i_read32(struct snd_hal2 *hal2, u16 addr)
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{
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u32 ret;
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struct hal2_ctl_regs *regs = hal2->ctl_regs;
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hal2_write(H2_READ_ADDR(addr), ®s->iar);
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H2_INDIRECT_WAIT(regs);
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ret = hal2_read(®s->idr0) & 0xffff;
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hal2_write(H2_READ_ADDR(addr) | 0x1, ®s->iar);
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H2_INDIRECT_WAIT(regs);
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ret |= (hal2_read(®s->idr0) & 0xffff) << 16;
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return ret;
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}
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static void hal2_i_write16(struct snd_hal2 *hal2, u16 addr, u16 val)
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{
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struct hal2_ctl_regs *regs = hal2->ctl_regs;
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hal2_write(val, ®s->idr0);
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hal2_write(0, ®s->idr1);
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hal2_write(0, ®s->idr2);
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hal2_write(0, ®s->idr3);
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hal2_write(H2_WRITE_ADDR(addr), ®s->iar);
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H2_INDIRECT_WAIT(regs);
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}
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static void hal2_i_write32(struct snd_hal2 *hal2, u16 addr, u32 val)
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{
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struct hal2_ctl_regs *regs = hal2->ctl_regs;
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hal2_write(val & 0xffff, ®s->idr0);
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hal2_write(val >> 16, ®s->idr1);
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hal2_write(0, ®s->idr2);
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hal2_write(0, ®s->idr3);
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hal2_write(H2_WRITE_ADDR(addr), ®s->iar);
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H2_INDIRECT_WAIT(regs);
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}
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static void hal2_i_setbit16(struct snd_hal2 *hal2, u16 addr, u16 bit)
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{
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struct hal2_ctl_regs *regs = hal2->ctl_regs;
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hal2_write(H2_READ_ADDR(addr), ®s->iar);
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H2_INDIRECT_WAIT(regs);
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hal2_write((hal2_read(®s->idr0) & 0xffff) | bit, ®s->idr0);
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hal2_write(0, ®s->idr1);
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hal2_write(0, ®s->idr2);
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hal2_write(0, ®s->idr3);
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hal2_write(H2_WRITE_ADDR(addr), ®s->iar);
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H2_INDIRECT_WAIT(regs);
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}
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static void hal2_i_clearbit16(struct snd_hal2 *hal2, u16 addr, u16 bit)
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{
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struct hal2_ctl_regs *regs = hal2->ctl_regs;
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hal2_write(H2_READ_ADDR(addr), ®s->iar);
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H2_INDIRECT_WAIT(regs);
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hal2_write((hal2_read(®s->idr0) & 0xffff) & ~bit, ®s->idr0);
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hal2_write(0, ®s->idr1);
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hal2_write(0, ®s->idr2);
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hal2_write(0, ®s->idr3);
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hal2_write(H2_WRITE_ADDR(addr), ®s->iar);
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H2_INDIRECT_WAIT(regs);
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}
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static int hal2_gain_info(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_info *uinfo)
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{
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uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
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uinfo->count = 2;
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uinfo->value.integer.min = 0;
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switch ((int)kcontrol->private_value) {
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case H2_MIX_OUTPUT_ATT:
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uinfo->value.integer.max = 31;
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break;
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case H2_MIX_INPUT_GAIN:
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uinfo->value.integer.max = 15;
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break;
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}
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return 0;
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}
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static int hal2_gain_get(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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{
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struct snd_hal2 *hal2 = snd_kcontrol_chip(kcontrol);
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u32 tmp;
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int l, r;
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switch ((int)kcontrol->private_value) {
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case H2_MIX_OUTPUT_ATT:
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tmp = hal2_i_read32(hal2, H2I_DAC_C2);
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if (tmp & H2I_C2_MUTE) {
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l = 0;
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r = 0;
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} else {
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l = 31 - ((tmp >> H2I_C2_L_ATT_SHIFT) & 31);
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r = 31 - ((tmp >> H2I_C2_R_ATT_SHIFT) & 31);
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}
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break;
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case H2_MIX_INPUT_GAIN:
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tmp = hal2_i_read32(hal2, H2I_ADC_C2);
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l = (tmp >> H2I_C2_L_GAIN_SHIFT) & 15;
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r = (tmp >> H2I_C2_R_GAIN_SHIFT) & 15;
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break;
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}
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ucontrol->value.integer.value[0] = l;
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ucontrol->value.integer.value[1] = r;
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return 0;
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}
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static int hal2_gain_put(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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{
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struct snd_hal2 *hal2 = snd_kcontrol_chip(kcontrol);
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u32 old, new;
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int l, r;
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l = ucontrol->value.integer.value[0];
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r = ucontrol->value.integer.value[1];
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switch ((int)kcontrol->private_value) {
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case H2_MIX_OUTPUT_ATT:
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old = hal2_i_read32(hal2, H2I_DAC_C2);
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new = old & ~(H2I_C2_L_ATT_M | H2I_C2_R_ATT_M | H2I_C2_MUTE);
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if (l | r) {
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l = 31 - l;
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r = 31 - r;
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new |= (l << H2I_C2_L_ATT_SHIFT);
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new |= (r << H2I_C2_R_ATT_SHIFT);
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} else
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new |= H2I_C2_L_ATT_M | H2I_C2_R_ATT_M | H2I_C2_MUTE;
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hal2_i_write32(hal2, H2I_DAC_C2, new);
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break;
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case H2_MIX_INPUT_GAIN:
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old = hal2_i_read32(hal2, H2I_ADC_C2);
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new = old & ~(H2I_C2_L_GAIN_M | H2I_C2_R_GAIN_M);
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new |= (l << H2I_C2_L_GAIN_SHIFT);
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new |= (r << H2I_C2_R_GAIN_SHIFT);
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hal2_i_write32(hal2, H2I_ADC_C2, new);
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break;
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}
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return old != new;
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}
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static struct snd_kcontrol_new hal2_ctrl_headphone = {
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.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
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.name = "Headphone Playback Volume",
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.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
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.private_value = H2_MIX_OUTPUT_ATT,
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.info = hal2_gain_info,
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.get = hal2_gain_get,
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.put = hal2_gain_put,
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};
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static struct snd_kcontrol_new hal2_ctrl_mic = {
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.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
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.name = "Mic Capture Volume",
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.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
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.private_value = H2_MIX_INPUT_GAIN,
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.info = hal2_gain_info,
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.get = hal2_gain_get,
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.put = hal2_gain_put,
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};
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static int hal2_mixer_create(struct snd_hal2 *hal2)
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{
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int err;
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/* mute DAC */
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hal2_i_write32(hal2, H2I_DAC_C2,
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H2I_C2_L_ATT_M | H2I_C2_R_ATT_M | H2I_C2_MUTE);
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/* mute ADC */
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hal2_i_write32(hal2, H2I_ADC_C2, 0);
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err = snd_ctl_add(hal2->card,
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snd_ctl_new1(&hal2_ctrl_headphone, hal2));
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if (err < 0)
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return err;
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err = snd_ctl_add(hal2->card,
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snd_ctl_new1(&hal2_ctrl_mic, hal2));
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if (err < 0)
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return err;
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return 0;
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}
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static irqreturn_t hal2_interrupt(int irq, void *dev_id)
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{
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struct snd_hal2 *hal2 = dev_id;
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irqreturn_t ret = IRQ_NONE;
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/* decide what caused this interrupt */
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if (hal2->dac.pbus.pbus->pbdma_ctrl & HPC3_PDMACTRL_INT) {
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snd_pcm_period_elapsed(hal2->dac.substream);
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ret = IRQ_HANDLED;
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}
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if (hal2->adc.pbus.pbus->pbdma_ctrl & HPC3_PDMACTRL_INT) {
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snd_pcm_period_elapsed(hal2->adc.substream);
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ret = IRQ_HANDLED;
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}
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return ret;
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}
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static int hal2_compute_rate(struct hal2_codec *codec, unsigned int rate)
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{
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unsigned short mod;
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if (44100 % rate < 48000 % rate) {
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mod = 4 * 44100 / rate;
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codec->master = 44100;
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} else {
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mod = 4 * 48000 / rate;
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codec->master = 48000;
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}
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codec->inc = 4;
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codec->mod = mod;
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rate = 4 * codec->master / mod;
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return rate;
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}
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static void hal2_set_dac_rate(struct snd_hal2 *hal2)
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{
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unsigned int master = hal2->dac.master;
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int inc = hal2->dac.inc;
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int mod = hal2->dac.mod;
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hal2_i_write16(hal2, H2I_BRES1_C1, (master == 44100) ? 1 : 0);
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hal2_i_write32(hal2, H2I_BRES1_C2,
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((0xffff & (inc - mod - 1)) << 16) | inc);
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}
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static void hal2_set_adc_rate(struct snd_hal2 *hal2)
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{
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unsigned int master = hal2->adc.master;
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int inc = hal2->adc.inc;
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int mod = hal2->adc.mod;
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hal2_i_write16(hal2, H2I_BRES2_C1, (master == 44100) ? 1 : 0);
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hal2_i_write32(hal2, H2I_BRES2_C2,
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((0xffff & (inc - mod - 1)) << 16) | inc);
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}
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static void hal2_setup_dac(struct snd_hal2 *hal2)
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{
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unsigned int fifobeg, fifoend, highwater, sample_size;
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struct hal2_pbus *pbus = &hal2->dac.pbus;
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/* Now we set up some PBUS information. The PBUS needs information about
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* what portion of the fifo it will use. If it's receiving or
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* transmitting, and finally whether the stream is little endian or big
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* endian. The information is written later, on the start call.
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*/
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sample_size = 2 * hal2->dac.voices;
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/* Fifo should be set to hold exactly four samples. Highwater mark
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* should be set to two samples. */
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highwater = (sample_size * 2) >> 1; /* halfwords */
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fifobeg = 0; /* playback is first */
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fifoend = (sample_size * 4) >> 3; /* doublewords */
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pbus->ctrl = HPC3_PDMACTRL_RT | HPC3_PDMACTRL_LD |
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(highwater << 8) | (fifobeg << 16) | (fifoend << 24);
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/* We disable everything before we do anything at all */
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pbus->pbus->pbdma_ctrl = HPC3_PDMACTRL_LD;
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hal2_i_clearbit16(hal2, H2I_DMA_PORT_EN, H2I_DMA_PORT_EN_CODECTX);
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/* Setup the HAL2 for playback */
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hal2_set_dac_rate(hal2);
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/* Set endianess */
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hal2_i_clearbit16(hal2, H2I_DMA_END, H2I_DMA_END_CODECTX);
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/* Set DMA bus */
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hal2_i_setbit16(hal2, H2I_DMA_DRV, (1 << pbus->pbusnr));
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/* We are using 1st Bresenham clock generator for playback */
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hal2_i_write16(hal2, H2I_DAC_C1, (pbus->pbusnr << H2I_C1_DMA_SHIFT)
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| (1 << H2I_C1_CLKID_SHIFT)
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| (hal2->dac.voices << H2I_C1_DATAT_SHIFT));
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}
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static void hal2_setup_adc(struct snd_hal2 *hal2)
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{
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unsigned int fifobeg, fifoend, highwater, sample_size;
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struct hal2_pbus *pbus = &hal2->adc.pbus;
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sample_size = 2 * hal2->adc.voices;
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highwater = (sample_size * 2) >> 1; /* halfwords */
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fifobeg = (4 * 4) >> 3; /* record is second */
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fifoend = (4 * 4 + sample_size * 4) >> 3; /* doublewords */
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pbus->ctrl = HPC3_PDMACTRL_RT | HPC3_PDMACTRL_RCV | HPC3_PDMACTRL_LD |
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(highwater << 8) | (fifobeg << 16) | (fifoend << 24);
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pbus->pbus->pbdma_ctrl = HPC3_PDMACTRL_LD;
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hal2_i_clearbit16(hal2, H2I_DMA_PORT_EN, H2I_DMA_PORT_EN_CODECR);
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/* Setup the HAL2 for record */
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hal2_set_adc_rate(hal2);
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/* Set endianess */
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hal2_i_clearbit16(hal2, H2I_DMA_END, H2I_DMA_END_CODECR);
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/* Set DMA bus */
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hal2_i_setbit16(hal2, H2I_DMA_DRV, (1 << pbus->pbusnr));
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/* We are using 2nd Bresenham clock generator for record */
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hal2_i_write16(hal2, H2I_ADC_C1, (pbus->pbusnr << H2I_C1_DMA_SHIFT)
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| (2 << H2I_C1_CLKID_SHIFT)
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| (hal2->adc.voices << H2I_C1_DATAT_SHIFT));
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}
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static void hal2_start_dac(struct snd_hal2 *hal2)
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{
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struct hal2_pbus *pbus = &hal2->dac.pbus;
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pbus->pbus->pbdma_dptr = hal2->dac.desc_dma;
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pbus->pbus->pbdma_ctrl = pbus->ctrl | HPC3_PDMACTRL_ACT;
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/* enable DAC */
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hal2_i_setbit16(hal2, H2I_DMA_PORT_EN, H2I_DMA_PORT_EN_CODECTX);
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}
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static void hal2_start_adc(struct snd_hal2 *hal2)
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{
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struct hal2_pbus *pbus = &hal2->adc.pbus;
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pbus->pbus->pbdma_dptr = hal2->adc.desc_dma;
|
|
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 snd_hal2 *hal2)
|
|
{
|
|
hal2->dac.pbus.pbus->pbdma_ctrl = HPC3_PDMACTRL_LD;
|
|
/* The HAL2 itself may remain enabled safely */
|
|
}
|
|
|
|
static inline void hal2_stop_adc(struct snd_hal2 *hal2)
|
|
{
|
|
hal2->adc.pbus.pbus->pbdma_ctrl = HPC3_PDMACTRL_LD;
|
|
}
|
|
|
|
static int hal2_alloc_dmabuf(struct hal2_codec *codec)
|
|
{
|
|
struct hal2_desc *desc;
|
|
dma_addr_t desc_dma, buffer_dma;
|
|
int count = H2_BUF_SIZE / H2_BLOCK_SIZE;
|
|
int i;
|
|
|
|
codec->buffer = dma_alloc_noncoherent(NULL, H2_BUF_SIZE,
|
|
&buffer_dma, GFP_KERNEL);
|
|
if (!codec->buffer)
|
|
return -ENOMEM;
|
|
desc = dma_alloc_noncoherent(NULL, count * sizeof(struct hal2_desc),
|
|
&desc_dma, GFP_KERNEL);
|
|
if (!desc) {
|
|
dma_free_noncoherent(NULL, H2_BUF_SIZE,
|
|
codec->buffer, buffer_dma);
|
|
return -ENOMEM;
|
|
}
|
|
codec->buffer_dma = buffer_dma;
|
|
codec->desc_dma = desc_dma;
|
|
codec->desc = desc;
|
|
for (i = 0; i < count; i++) {
|
|
desc->desc.pbuf = buffer_dma + i * H2_BLOCK_SIZE;
|
|
desc->desc.cntinfo = HPCDMA_XIE | H2_BLOCK_SIZE;
|
|
desc->desc.pnext = (i == count - 1) ?
|
|
desc_dma : desc_dma + (i + 1) * sizeof(struct hal2_desc);
|
|
desc++;
|
|
}
|
|
dma_cache_sync(NULL, codec->desc, count * sizeof(struct hal2_desc),
|
|
DMA_TO_DEVICE);
|
|
codec->desc_count = count;
|
|
return 0;
|
|
}
|
|
|
|
static void hal2_free_dmabuf(struct hal2_codec *codec)
|
|
{
|
|
dma_free_noncoherent(NULL, codec->desc_count * sizeof(struct hal2_desc),
|
|
codec->desc, codec->desc_dma);
|
|
dma_free_noncoherent(NULL, H2_BUF_SIZE, codec->buffer,
|
|
codec->buffer_dma);
|
|
}
|
|
|
|
static struct snd_pcm_hardware hal2_pcm_hw = {
|
|
.info = (SNDRV_PCM_INFO_MMAP |
|
|
SNDRV_PCM_INFO_MMAP_VALID |
|
|
SNDRV_PCM_INFO_INTERLEAVED |
|
|
SNDRV_PCM_INFO_BLOCK_TRANSFER),
|
|
.formats = SNDRV_PCM_FMTBIT_S16_BE,
|
|
.rates = SNDRV_PCM_RATE_8000_48000,
|
|
.rate_min = 8000,
|
|
.rate_max = 48000,
|
|
.channels_min = 2,
|
|
.channels_max = 2,
|
|
.buffer_bytes_max = 65536,
|
|
.period_bytes_min = 1024,
|
|
.period_bytes_max = 65536,
|
|
.periods_min = 2,
|
|
.periods_max = 1024,
|
|
};
|
|
|
|
static int hal2_pcm_hw_params(struct snd_pcm_substream *substream,
|
|
struct snd_pcm_hw_params *params)
|
|
{
|
|
int err;
|
|
|
|
err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));
|
|
if (err < 0)
|
|
return err;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int hal2_pcm_hw_free(struct snd_pcm_substream *substream)
|
|
{
|
|
return snd_pcm_lib_free_pages(substream);
|
|
}
|
|
|
|
static int hal2_playback_open(struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
|
struct snd_hal2 *hal2 = snd_pcm_substream_chip(substream);
|
|
int err;
|
|
|
|
runtime->hw = hal2_pcm_hw;
|
|
|
|
err = hal2_alloc_dmabuf(&hal2->dac);
|
|
if (err)
|
|
return err;
|
|
return 0;
|
|
}
|
|
|
|
static int hal2_playback_close(struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_hal2 *hal2 = snd_pcm_substream_chip(substream);
|
|
|
|
hal2_free_dmabuf(&hal2->dac);
|
|
return 0;
|
|
}
|
|
|
|
static int hal2_playback_prepare(struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_hal2 *hal2 = snd_pcm_substream_chip(substream);
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
|
struct hal2_codec *dac = &hal2->dac;
|
|
|
|
dac->voices = runtime->channels;
|
|
dac->sample_rate = hal2_compute_rate(dac, runtime->rate);
|
|
memset(&dac->pcm_indirect, 0, sizeof(dac->pcm_indirect));
|
|
dac->pcm_indirect.hw_buffer_size = H2_BUF_SIZE;
|
|
dac->pcm_indirect.sw_buffer_size = snd_pcm_lib_buffer_bytes(substream);
|
|
dac->substream = substream;
|
|
hal2_setup_dac(hal2);
|
|
return 0;
|
|
}
|
|
|
|
static int hal2_playback_trigger(struct snd_pcm_substream *substream, int cmd)
|
|
{
|
|
struct snd_hal2 *hal2 = snd_pcm_substream_chip(substream);
|
|
|
|
switch (cmd) {
|
|
case SNDRV_PCM_TRIGGER_START:
|
|
hal2->dac.pcm_indirect.hw_io = hal2->dac.buffer_dma;
|
|
hal2->dac.pcm_indirect.hw_data = 0;
|
|
substream->ops->ack(substream);
|
|
hal2_start_dac(hal2);
|
|
break;
|
|
case SNDRV_PCM_TRIGGER_STOP:
|
|
hal2_stop_dac(hal2);
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static snd_pcm_uframes_t
|
|
hal2_playback_pointer(struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_hal2 *hal2 = snd_pcm_substream_chip(substream);
|
|
struct hal2_codec *dac = &hal2->dac;
|
|
|
|
return snd_pcm_indirect_playback_pointer(substream, &dac->pcm_indirect,
|
|
dac->pbus.pbus->pbdma_bptr);
|
|
}
|
|
|
|
static void hal2_playback_transfer(struct snd_pcm_substream *substream,
|
|
struct snd_pcm_indirect *rec, size_t bytes)
|
|
{
|
|
struct snd_hal2 *hal2 = snd_pcm_substream_chip(substream);
|
|
unsigned char *buf = hal2->dac.buffer + rec->hw_data;
|
|
|
|
memcpy(buf, substream->runtime->dma_area + rec->sw_data, bytes);
|
|
dma_cache_sync(NULL, buf, bytes, DMA_TO_DEVICE);
|
|
|
|
}
|
|
|
|
static int hal2_playback_ack(struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_hal2 *hal2 = snd_pcm_substream_chip(substream);
|
|
struct hal2_codec *dac = &hal2->dac;
|
|
|
|
dac->pcm_indirect.hw_queue_size = H2_BUF_SIZE / 2;
|
|
snd_pcm_indirect_playback_transfer(substream,
|
|
&dac->pcm_indirect,
|
|
hal2_playback_transfer);
|
|
return 0;
|
|
}
|
|
|
|
static int hal2_capture_open(struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
|
struct snd_hal2 *hal2 = snd_pcm_substream_chip(substream);
|
|
struct hal2_codec *adc = &hal2->adc;
|
|
int err;
|
|
|
|
runtime->hw = hal2_pcm_hw;
|
|
|
|
err = hal2_alloc_dmabuf(adc);
|
|
if (err)
|
|
return err;
|
|
return 0;
|
|
}
|
|
|
|
static int hal2_capture_close(struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_hal2 *hal2 = snd_pcm_substream_chip(substream);
|
|
|
|
hal2_free_dmabuf(&hal2->adc);
|
|
return 0;
|
|
}
|
|
|
|
static int hal2_capture_prepare(struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_hal2 *hal2 = snd_pcm_substream_chip(substream);
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
|
struct hal2_codec *adc = &hal2->adc;
|
|
|
|
adc->voices = runtime->channels;
|
|
adc->sample_rate = hal2_compute_rate(adc, runtime->rate);
|
|
memset(&adc->pcm_indirect, 0, sizeof(adc->pcm_indirect));
|
|
adc->pcm_indirect.hw_buffer_size = H2_BUF_SIZE;
|
|
adc->pcm_indirect.hw_queue_size = H2_BUF_SIZE / 2;
|
|
adc->pcm_indirect.sw_buffer_size = snd_pcm_lib_buffer_bytes(substream);
|
|
adc->substream = substream;
|
|
hal2_setup_adc(hal2);
|
|
return 0;
|
|
}
|
|
|
|
static int hal2_capture_trigger(struct snd_pcm_substream *substream, int cmd)
|
|
{
|
|
struct snd_hal2 *hal2 = snd_pcm_substream_chip(substream);
|
|
|
|
switch (cmd) {
|
|
case SNDRV_PCM_TRIGGER_START:
|
|
hal2->adc.pcm_indirect.hw_io = hal2->adc.buffer_dma;
|
|
hal2->adc.pcm_indirect.hw_data = 0;
|
|
printk(KERN_DEBUG "buffer_dma %x\n", hal2->adc.buffer_dma);
|
|
hal2_start_adc(hal2);
|
|
break;
|
|
case SNDRV_PCM_TRIGGER_STOP:
|
|
hal2_stop_adc(hal2);
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static snd_pcm_uframes_t
|
|
hal2_capture_pointer(struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_hal2 *hal2 = snd_pcm_substream_chip(substream);
|
|
struct hal2_codec *adc = &hal2->adc;
|
|
|
|
return snd_pcm_indirect_capture_pointer(substream, &adc->pcm_indirect,
|
|
adc->pbus.pbus->pbdma_bptr);
|
|
}
|
|
|
|
static void hal2_capture_transfer(struct snd_pcm_substream *substream,
|
|
struct snd_pcm_indirect *rec, size_t bytes)
|
|
{
|
|
struct snd_hal2 *hal2 = snd_pcm_substream_chip(substream);
|
|
unsigned char *buf = hal2->adc.buffer + rec->hw_data;
|
|
|
|
dma_cache_sync(NULL, buf, bytes, DMA_FROM_DEVICE);
|
|
memcpy(substream->runtime->dma_area + rec->sw_data, buf, bytes);
|
|
}
|
|
|
|
static int hal2_capture_ack(struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_hal2 *hal2 = snd_pcm_substream_chip(substream);
|
|
struct hal2_codec *adc = &hal2->adc;
|
|
|
|
snd_pcm_indirect_capture_transfer(substream,
|
|
&adc->pcm_indirect,
|
|
hal2_capture_transfer);
|
|
return 0;
|
|
}
|
|
|
|
static struct snd_pcm_ops hal2_playback_ops = {
|
|
.open = hal2_playback_open,
|
|
.close = hal2_playback_close,
|
|
.ioctl = snd_pcm_lib_ioctl,
|
|
.hw_params = hal2_pcm_hw_params,
|
|
.hw_free = hal2_pcm_hw_free,
|
|
.prepare = hal2_playback_prepare,
|
|
.trigger = hal2_playback_trigger,
|
|
.pointer = hal2_playback_pointer,
|
|
.ack = hal2_playback_ack,
|
|
};
|
|
|
|
static struct snd_pcm_ops hal2_capture_ops = {
|
|
.open = hal2_capture_open,
|
|
.close = hal2_capture_close,
|
|
.ioctl = snd_pcm_lib_ioctl,
|
|
.hw_params = hal2_pcm_hw_params,
|
|
.hw_free = hal2_pcm_hw_free,
|
|
.prepare = hal2_capture_prepare,
|
|
.trigger = hal2_capture_trigger,
|
|
.pointer = hal2_capture_pointer,
|
|
.ack = hal2_capture_ack,
|
|
};
|
|
|
|
static int hal2_pcm_create(struct snd_hal2 *hal2)
|
|
{
|
|
struct snd_pcm *pcm;
|
|
int err;
|
|
|
|
/* create first pcm device with one outputs and one input */
|
|
err = snd_pcm_new(hal2->card, "SGI HAL2 Audio", 0, 1, 1, &pcm);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
pcm->private_data = hal2;
|
|
strcpy(pcm->name, "SGI HAL2");
|
|
|
|
/* set operators */
|
|
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
|
|
&hal2_playback_ops);
|
|
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
|
|
&hal2_capture_ops);
|
|
snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS,
|
|
snd_dma_continuous_data(GFP_KERNEL),
|
|
0, 1024 * 1024);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int hal2_dev_free(struct snd_device *device)
|
|
{
|
|
struct snd_hal2 *hal2 = device->device_data;
|
|
|
|
free_irq(SGI_HPCDMA_IRQ, hal2);
|
|
kfree(hal2);
|
|
return 0;
|
|
}
|
|
|
|
static struct snd_device_ops hal2_ops = {
|
|
.dev_free = hal2_dev_free,
|
|
};
|
|
|
|
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];
|
|
}
|
|
|
|
static int hal2_detect(struct snd_hal2 *hal2)
|
|
{
|
|
unsigned short board, major, minor;
|
|
unsigned short rev;
|
|
|
|
/* reset HAL2 */
|
|
hal2_write(0, &hal2->ctl_regs->isr);
|
|
|
|
/* release reset */
|
|
hal2_write(H2_ISR_GLOBAL_RESET_N | H2_ISR_CODEC_RESET_N,
|
|
&hal2->ctl_regs->isr);
|
|
|
|
|
|
hal2_i_write16(hal2, H2I_RELAY_C, H2I_RELAY_C_STATE);
|
|
rev = hal2_read(&hal2->ctl_regs->rev);
|
|
if (rev & 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_create(struct snd_card *card, struct snd_hal2 **rchip)
|
|
{
|
|
struct snd_hal2 *hal2;
|
|
struct hpc3_regs *hpc3 = hpc3c0;
|
|
int err;
|
|
|
|
hal2 = kzalloc(sizeof(struct snd_hal2), GFP_KERNEL);
|
|
if (!hal2)
|
|
return -ENOMEM;
|
|
|
|
hal2->card = card;
|
|
|
|
if (request_irq(SGI_HPCDMA_IRQ, hal2_interrupt, IRQF_SHARED,
|
|
"SGI HAL2", hal2)) {
|
|
printk(KERN_ERR "HAL2: Can't get irq %d\n", SGI_HPCDMA_IRQ);
|
|
kfree(hal2);
|
|
return -EAGAIN;
|
|
}
|
|
|
|
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) {
|
|
kfree(hal2);
|
|
return -ENODEV;
|
|
}
|
|
|
|
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;
|
|
|
|
err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, hal2, &hal2_ops);
|
|
if (err < 0) {
|
|
free_irq(SGI_HPCDMA_IRQ, hal2);
|
|
kfree(hal2);
|
|
return err;
|
|
}
|
|
*rchip = hal2;
|
|
return 0;
|
|
}
|
|
|
|
static int hal2_probe(struct platform_device *pdev)
|
|
{
|
|
struct snd_card *card;
|
|
struct snd_hal2 *chip;
|
|
int err;
|
|
|
|
err = snd_card_new(&pdev->dev, index, id, THIS_MODULE, 0, &card);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
err = hal2_create(card, &chip);
|
|
if (err < 0) {
|
|
snd_card_free(card);
|
|
return err;
|
|
}
|
|
|
|
err = hal2_pcm_create(chip);
|
|
if (err < 0) {
|
|
snd_card_free(card);
|
|
return err;
|
|
}
|
|
err = hal2_mixer_create(chip);
|
|
if (err < 0) {
|
|
snd_card_free(card);
|
|
return err;
|
|
}
|
|
|
|
strcpy(card->driver, "SGI HAL2 Audio");
|
|
strcpy(card->shortname, "SGI HAL2 Audio");
|
|
sprintf(card->longname, "%s irq %i",
|
|
card->shortname,
|
|
SGI_HPCDMA_IRQ);
|
|
|
|
err = snd_card_register(card);
|
|
if (err < 0) {
|
|
snd_card_free(card);
|
|
return err;
|
|
}
|
|
platform_set_drvdata(pdev, card);
|
|
return 0;
|
|
}
|
|
|
|
static int hal2_remove(struct platform_device *pdev)
|
|
{
|
|
struct snd_card *card = platform_get_drvdata(pdev);
|
|
|
|
snd_card_free(card);
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver hal2_driver = {
|
|
.probe = hal2_probe,
|
|
.remove = hal2_remove,
|
|
.driver = {
|
|
.name = "sgihal2",
|
|
}
|
|
};
|
|
|
|
module_platform_driver(hal2_driver);
|