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es1968.c
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es1968.c
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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Driver for ESS Maestro 1/2/2E Sound Card (started 21.8.99)
* Copyright (c) by Matze Braun <[email protected]>.
* Takashi Iwai <[email protected]>
*
* Most of the driver code comes from Zach Brown([email protected])
* Alan Cox OSS Driver
* Rewritted from card-es1938.c source.
*
* TODO:
* Perhaps Synth
*
* Notes from Zach Brown about the driver code
*
* Hardware Description
*
* A working Maestro setup contains the Maestro chip wired to a
* codec or 2. In the Maestro we have the APUs, the ASSP, and the
* Wavecache. The APUs can be though of as virtual audio routing
* channels. They can take data from a number of sources and perform
* basic encodings of the data. The wavecache is a storehouse for
* PCM data. Typically it deals with PCI and interracts with the
* APUs. The ASSP is a wacky DSP like device that ESS is loth
* to release docs on. Thankfully it isn't required on the Maestro
* until you start doing insane things like FM emulation and surround
* encoding. The codecs are almost always AC-97 compliant codecs,
* but it appears that early Maestros may have had PT101 (an ESS
* part?) wired to them. The only real difference in the Maestro
* families is external goop like docking capability, memory for
* the ASSP, and initialization differences.
*
* Driver Operation
*
* We only drive the APU/Wavecache as typical DACs and drive the
* mixers in the codecs. There are 64 APUs. We assign 6 to each
* /dev/dsp? device. 2 channels for output, and 4 channels for
* input.
*
* Each APU can do a number of things, but we only really use
* 3 basic functions. For playback we use them to convert PCM
* data fetched over PCI by the wavecahche into analog data that
* is handed to the codec. One APU for mono, and a pair for stereo.
* When in stereo, the combination of smarts in the APU and Wavecache
* decide which wavecache gets the left or right channel.
*
* For record we still use the old overly mono system. For each in
* coming channel the data comes in from the codec, through a 'input'
* APU, through another rate converter APU, and then into memory via
* the wavecache and PCI. If its stereo, we mash it back into LRLR in
* software. The pass between the 2 APUs is supposedly what requires us
* to have a 512 byte buffer sitting around in wavecache/memory.
*
* The wavecache makes our life even more fun. First off, it can
* only address the first 28 bits of PCI address space, making it
* useless on quite a few architectures. Secondly, its insane.
* It claims to fetch from 4 regions of PCI space, each 4 meg in length.
* But that doesn't really work. You can only use 1 region. So all our
* allocations have to be in 4meg of each other. Booo. Hiss.
* So we have a module parameter, dsps_order, that is the order of
* the number of dsps to provide. All their buffer space is allocated
* on open time. The sonicvibes OSS routines we inherited really want
* power of 2 buffers, so we have all those next to each other, then
* 512 byte regions for the recording wavecaches. This ends up
* wasting quite a bit of memory. The only fixes I can see would be
* getting a kernel allocator that could work in zones, or figuring out
* just how to coerce the WP into doing what we want.
*
* The indirection of the various registers means we have to spinlock
* nearly all register accesses. We have the main register indirection
* like the wave cache, maestro registers, etc. Then we have beasts
* like the APU interface that is indirect registers gotten at through
* the main maestro indirection. Ouch. We spinlock around the actual
* ports on a per card basis. This means spinlock activity at each IO
* operation, but the only IO operation clusters are in non critical
* paths and it makes the code far easier to follow. Interrupts are
* blocked while holding the locks because the int handler has to
* get at some of them :(. The mixer interface doesn't, however.
* We also have an OSS state lock that is thrown around in a few
* places.
*/
#include <linux/io.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/dma-mapping.h>
#include <linux/slab.h>
#include <linux/gameport.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/input.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/mpu401.h>
#include <sound/ac97_codec.h>
#include <sound/initval.h>
#ifdef CONFIG_SND_ES1968_RADIO
#include <media/drv-intf/tea575x.h>
#endif
#define CARD_NAME "ESS Maestro1/2"
#define DRIVER_NAME "ES1968"
MODULE_DESCRIPTION("ESS Maestro");
MODULE_LICENSE("GPL");
#if IS_REACHABLE(CONFIG_GAMEPORT)
#define SUPPORT_JOYSTICK 1
#endif
static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 1-MAX */
static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */
static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP; /* Enable this card */
static int total_bufsize[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 1024 };
static int pcm_substreams_p[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 4 };
static int pcm_substreams_c[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 1 };
static int clock[SNDRV_CARDS];
static int use_pm[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 2};
static int enable_mpu[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 2};
#ifdef SUPPORT_JOYSTICK
static bool joystick[SNDRV_CARDS];
#endif
static int radio_nr[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = -1};
module_param_array(index, int, NULL, 0444);
MODULE_PARM_DESC(index, "Index value for " CARD_NAME " soundcard.");
module_param_array(id, charp, NULL, 0444);
MODULE_PARM_DESC(id, "ID string for " CARD_NAME " soundcard.");
module_param_array(enable, bool, NULL, 0444);
MODULE_PARM_DESC(enable, "Enable " CARD_NAME " soundcard.");
module_param_array(total_bufsize, int, NULL, 0444);
MODULE_PARM_DESC(total_bufsize, "Total buffer size in kB.");
module_param_array(pcm_substreams_p, int, NULL, 0444);
MODULE_PARM_DESC(pcm_substreams_p, "PCM Playback substreams for " CARD_NAME " soundcard.");
module_param_array(pcm_substreams_c, int, NULL, 0444);
MODULE_PARM_DESC(pcm_substreams_c, "PCM Capture substreams for " CARD_NAME " soundcard.");
module_param_array(clock, int, NULL, 0444);
MODULE_PARM_DESC(clock, "Clock on " CARD_NAME " soundcard. (0 = auto-detect)");
module_param_array(use_pm, int, NULL, 0444);
MODULE_PARM_DESC(use_pm, "Toggle power-management. (0 = off, 1 = on, 2 = auto)");
module_param_array(enable_mpu, int, NULL, 0444);
MODULE_PARM_DESC(enable_mpu, "Enable MPU401. (0 = off, 1 = on, 2 = auto)");
#ifdef SUPPORT_JOYSTICK
module_param_array(joystick, bool, NULL, 0444);
MODULE_PARM_DESC(joystick, "Enable joystick.");
#endif
module_param_array(radio_nr, int, NULL, 0444);
MODULE_PARM_DESC(radio_nr, "Radio device numbers");
#define NR_APUS 64
#define NR_APU_REGS 16
/* NEC Versas ? */
#define NEC_VERSA_SUBID1 0x80581033
#define NEC_VERSA_SUBID2 0x803c1033
/* Mode Flags */
#define ESS_FMT_STEREO 0x01
#define ESS_FMT_16BIT 0x02
#define DAC_RUNNING 1
#define ADC_RUNNING 2
/* Values for the ESM_LEGACY_AUDIO_CONTROL */
#define ESS_DISABLE_AUDIO 0x8000
#define ESS_ENABLE_SERIAL_IRQ 0x4000
#define IO_ADRESS_ALIAS 0x0020
#define MPU401_IRQ_ENABLE 0x0010
#define MPU401_IO_ENABLE 0x0008
#define GAME_IO_ENABLE 0x0004
#define FM_IO_ENABLE 0x0002
#define SB_IO_ENABLE 0x0001
/* Values for the ESM_CONFIG_A */
#define PIC_SNOOP1 0x4000
#define PIC_SNOOP2 0x2000
#define SAFEGUARD 0x0800
#define DMA_CLEAR 0x0700
#define DMA_DDMA 0x0000
#define DMA_TDMA 0x0100
#define DMA_PCPCI 0x0200
#define POST_WRITE 0x0080
#define PCI_TIMING 0x0040
#define SWAP_LR 0x0020
#define SUBTR_DECODE 0x0002
/* Values for the ESM_CONFIG_B */
#define SPDIF_CONFB 0x0100
#define HWV_CONFB 0x0080
#define DEBOUNCE 0x0040
#define GPIO_CONFB 0x0020
#define CHI_CONFB 0x0010
#define IDMA_CONFB 0x0008 /*undoc */
#define MIDI_FIX 0x0004 /*undoc */
#define IRQ_TO_ISA 0x0001 /*undoc */
/* Values for Ring Bus Control B */
#define RINGB_2CODEC_ID_MASK 0x0003
#define RINGB_DIS_VALIDATION 0x0008
#define RINGB_EN_SPDIF 0x0010
#define RINGB_EN_2CODEC 0x0020
#define RINGB_SING_BIT_DUAL 0x0040
/* ****Port Addresses**** */
/* Write & Read */
#define ESM_INDEX 0x02
#define ESM_DATA 0x00
/* AC97 + RingBus */
#define ESM_AC97_INDEX 0x30
#define ESM_AC97_DATA 0x32
#define ESM_RING_BUS_DEST 0x34
#define ESM_RING_BUS_CONTR_A 0x36
#define ESM_RING_BUS_CONTR_B 0x38
#define ESM_RING_BUS_SDO 0x3A
/* WaveCache*/
#define WC_INDEX 0x10
#define WC_DATA 0x12
#define WC_CONTROL 0x14
/* ASSP*/
#define ASSP_INDEX 0x80
#define ASSP_MEMORY 0x82
#define ASSP_DATA 0x84
#define ASSP_CONTROL_A 0xA2
#define ASSP_CONTROL_B 0xA4
#define ASSP_CONTROL_C 0xA6
#define ASSP_HOSTW_INDEX 0xA8
#define ASSP_HOSTW_DATA 0xAA
#define ASSP_HOSTW_IRQ 0xAC
/* Midi */
#define ESM_MPU401_PORT 0x98
/* Others */
#define ESM_PORT_HOST_IRQ 0x18
#define IDR0_DATA_PORT 0x00
#define IDR1_CRAM_POINTER 0x01
#define IDR2_CRAM_DATA 0x02
#define IDR3_WAVE_DATA 0x03
#define IDR4_WAVE_PTR_LOW 0x04
#define IDR5_WAVE_PTR_HI 0x05
#define IDR6_TIMER_CTRL 0x06
#define IDR7_WAVE_ROMRAM 0x07
#define WRITEABLE_MAP 0xEFFFFF
#define READABLE_MAP 0x64003F
/* PCI Register */
#define ESM_LEGACY_AUDIO_CONTROL 0x40
#define ESM_ACPI_COMMAND 0x54
#define ESM_CONFIG_A 0x50
#define ESM_CONFIG_B 0x52
#define ESM_DDMA 0x60
/* Bob Bits */
#define ESM_BOB_ENABLE 0x0001
#define ESM_BOB_START 0x0001
/* Host IRQ Control Bits */
#define ESM_RESET_MAESTRO 0x8000
#define ESM_RESET_DIRECTSOUND 0x4000
#define ESM_HIRQ_ClkRun 0x0100
#define ESM_HIRQ_HW_VOLUME 0x0040
#define ESM_HIRQ_HARPO 0x0030 /* What's that? */
#define ESM_HIRQ_ASSP 0x0010
#define ESM_HIRQ_DSIE 0x0004
#define ESM_HIRQ_MPU401 0x0002
#define ESM_HIRQ_SB 0x0001
/* Host IRQ Status Bits */
#define ESM_MPU401_IRQ 0x02
#define ESM_SB_IRQ 0x01
#define ESM_SOUND_IRQ 0x04
#define ESM_ASSP_IRQ 0x10
#define ESM_HWVOL_IRQ 0x40
#define ESS_SYSCLK 50000000
#define ESM_BOB_FREQ 200
#define ESM_BOB_FREQ_MAX 800
#define ESM_FREQ_ESM1 (49152000L / 1024L) /* default rate 48000 */
#define ESM_FREQ_ESM2 (50000000L / 1024L)
/* APU Modes: reg 0x00, bit 4-7 */
#define ESM_APU_MODE_SHIFT 4
#define ESM_APU_MODE_MASK (0xf << 4)
#define ESM_APU_OFF 0x00
#define ESM_APU_16BITLINEAR 0x01 /* 16-Bit Linear Sample Player */
#define ESM_APU_16BITSTEREO 0x02 /* 16-Bit Stereo Sample Player */
#define ESM_APU_8BITLINEAR 0x03 /* 8-Bit Linear Sample Player */
#define ESM_APU_8BITSTEREO 0x04 /* 8-Bit Stereo Sample Player */
#define ESM_APU_8BITDIFF 0x05 /* 8-Bit Differential Sample Playrer */
#define ESM_APU_DIGITALDELAY 0x06 /* Digital Delay Line */
#define ESM_APU_DUALTAP 0x07 /* Dual Tap Reader */
#define ESM_APU_CORRELATOR 0x08 /* Correlator */
#define ESM_APU_INPUTMIXER 0x09 /* Input Mixer */
#define ESM_APU_WAVETABLE 0x0A /* Wave Table Mode */
#define ESM_APU_SRCONVERTOR 0x0B /* Sample Rate Convertor */
#define ESM_APU_16BITPINGPONG 0x0C /* 16-Bit Ping-Pong Sample Player */
#define ESM_APU_RESERVED1 0x0D /* Reserved 1 */
#define ESM_APU_RESERVED2 0x0E /* Reserved 2 */
#define ESM_APU_RESERVED3 0x0F /* Reserved 3 */
/* reg 0x00 */
#define ESM_APU_FILTER_Q_SHIFT 0
#define ESM_APU_FILTER_Q_MASK (3 << 0)
/* APU Filtey Q Control */
#define ESM_APU_FILTER_LESSQ 0x00
#define ESM_APU_FILTER_MOREQ 0x03
#define ESM_APU_FILTER_TYPE_SHIFT 2
#define ESM_APU_FILTER_TYPE_MASK (3 << 2)
#define ESM_APU_ENV_TYPE_SHIFT 8
#define ESM_APU_ENV_TYPE_MASK (3 << 8)
#define ESM_APU_ENV_STATE_SHIFT 10
#define ESM_APU_ENV_STATE_MASK (3 << 10)
#define ESM_APU_END_CURVE (1 << 12)
#define ESM_APU_INT_ON_LOOP (1 << 13)
#define ESM_APU_DMA_ENABLE (1 << 14)
/* reg 0x02 */
#define ESM_APU_SUBMIX_GROUP_SHIRT 0
#define ESM_APU_SUBMIX_GROUP_MASK (7 << 0)
#define ESM_APU_SUBMIX_MODE (1 << 3)
#define ESM_APU_6dB (1 << 4)
#define ESM_APU_DUAL_EFFECT (1 << 5)
#define ESM_APU_EFFECT_CHANNELS_SHIFT 6
#define ESM_APU_EFFECT_CHANNELS_MASK (3 << 6)
/* reg 0x03 */
#define ESM_APU_STEP_SIZE_MASK 0x0fff
/* reg 0x04 */
#define ESM_APU_PHASE_SHIFT 0
#define ESM_APU_PHASE_MASK (0xff << 0)
#define ESM_APU_WAVE64K_PAGE_SHIFT 8 /* most 8bit of wave start offset */
#define ESM_APU_WAVE64K_PAGE_MASK (0xff << 8)
/* reg 0x05 - wave start offset */
/* reg 0x06 - wave end offset */
/* reg 0x07 - wave loop length */
/* reg 0x08 */
#define ESM_APU_EFFECT_GAIN_SHIFT 0
#define ESM_APU_EFFECT_GAIN_MASK (0xff << 0)
#define ESM_APU_TREMOLO_DEPTH_SHIFT 8
#define ESM_APU_TREMOLO_DEPTH_MASK (0xf << 8)
#define ESM_APU_TREMOLO_RATE_SHIFT 12
#define ESM_APU_TREMOLO_RATE_MASK (0xf << 12)
/* reg 0x09 */
/* bit 0-7 amplitude dest? */
#define ESM_APU_AMPLITUDE_NOW_SHIFT 8
#define ESM_APU_AMPLITUDE_NOW_MASK (0xff << 8)
/* reg 0x0a */
#define ESM_APU_POLAR_PAN_SHIFT 0
#define ESM_APU_POLAR_PAN_MASK (0x3f << 0)
/* Polar Pan Control */
#define ESM_APU_PAN_CENTER_CIRCLE 0x00
#define ESM_APU_PAN_MIDDLE_RADIUS 0x01
#define ESM_APU_PAN_OUTSIDE_RADIUS 0x02
#define ESM_APU_FILTER_TUNING_SHIFT 8
#define ESM_APU_FILTER_TUNING_MASK (0xff << 8)
/* reg 0x0b */
#define ESM_APU_DATA_SRC_A_SHIFT 0
#define ESM_APU_DATA_SRC_A_MASK (0x7f << 0)
#define ESM_APU_INV_POL_A (1 << 7)
#define ESM_APU_DATA_SRC_B_SHIFT 8
#define ESM_APU_DATA_SRC_B_MASK (0x7f << 8)
#define ESM_APU_INV_POL_B (1 << 15)
#define ESM_APU_VIBRATO_RATE_SHIFT 0
#define ESM_APU_VIBRATO_RATE_MASK (0xf << 0)
#define ESM_APU_VIBRATO_DEPTH_SHIFT 4
#define ESM_APU_VIBRATO_DEPTH_MASK (0xf << 4)
#define ESM_APU_VIBRATO_PHASE_SHIFT 8
#define ESM_APU_VIBRATO_PHASE_MASK (0xff << 8)
/* reg 0x0c */
#define ESM_APU_RADIUS_SELECT (1 << 6)
/* APU Filter Control */
#define ESM_APU_FILTER_2POLE_LOPASS 0x00
#define ESM_APU_FILTER_2POLE_BANDPASS 0x01
#define ESM_APU_FILTER_2POLE_HIPASS 0x02
#define ESM_APU_FILTER_1POLE_LOPASS 0x03
#define ESM_APU_FILTER_1POLE_HIPASS 0x04
#define ESM_APU_FILTER_OFF 0x05
/* APU ATFP Type */
#define ESM_APU_ATFP_AMPLITUDE 0x00
#define ESM_APU_ATFP_TREMELO 0x01
#define ESM_APU_ATFP_FILTER 0x02
#define ESM_APU_ATFP_PAN 0x03
/* APU ATFP Flags */
#define ESM_APU_ATFP_FLG_OFF 0x00
#define ESM_APU_ATFP_FLG_WAIT 0x01
#define ESM_APU_ATFP_FLG_DONE 0x02
#define ESM_APU_ATFP_FLG_INPROCESS 0x03
/* capture mixing buffer size */
#define ESM_MEM_ALIGN 0x1000
#define ESM_MIXBUF_SIZE 0x400
#define ESM_MODE_PLAY 0
#define ESM_MODE_CAPTURE 1
/* APU use in the driver */
enum snd_enum_apu_type {
ESM_APU_PCM_PLAY,
ESM_APU_PCM_CAPTURE,
ESM_APU_PCM_RATECONV,
ESM_APU_FREE
};
/* chip type */
enum {
TYPE_MAESTRO, TYPE_MAESTRO2, TYPE_MAESTRO2E
};
/* DMA Hack! */
struct esm_memory {
struct snd_dma_buffer buf;
int empty; /* status */
struct list_head list;
};
/* Playback Channel */
struct esschan {
int running;
u8 apu[4];
u8 apu_mode[4];
/* playback/capture pcm buffer */
struct esm_memory *memory;
/* capture mixer buffer */
struct esm_memory *mixbuf;
unsigned int hwptr; /* current hw pointer in bytes */
unsigned int count; /* sample counter in bytes */
unsigned int dma_size; /* total buffer size in bytes */
unsigned int frag_size; /* period size in bytes */
unsigned int wav_shift;
u16 base[4]; /* offset for ptr */
/* stereo/16bit flag */
unsigned char fmt;
int mode; /* playback / capture */
int bob_freq; /* required timer frequency */
struct snd_pcm_substream *substream;
/* linked list */
struct list_head list;
u16 wc_map[4];
};
struct es1968 {
/* Module Config */
int total_bufsize; /* in bytes */
int playback_streams, capture_streams;
unsigned int clock; /* clock */
/* for clock measurement */
unsigned int in_measurement: 1;
unsigned int measure_apu;
unsigned int measure_lastpos;
unsigned int measure_count;
/* buffer */
struct snd_dma_buffer dma;
/* Resources... */
int irq;
unsigned long io_port;
int type;
struct pci_dev *pci;
struct snd_card *card;
struct snd_pcm *pcm;
int do_pm; /* power-management enabled */
/* DMA memory block */
struct list_head buf_list;
/* ALSA Stuff */
struct snd_ac97 *ac97;
struct snd_rawmidi *rmidi;
spinlock_t reg_lock;
unsigned int in_suspend;
/* Maestro Stuff */
u16 maestro_map[32];
int bobclient; /* active timer instancs */
int bob_freq; /* timer frequency */
struct mutex memory_mutex; /* memory lock */
/* APU states */
unsigned char apu[NR_APUS];
/* active substreams */
struct list_head substream_list;
spinlock_t substream_lock;
u16 apu_map[NR_APUS][NR_APU_REGS];
#ifdef SUPPORT_JOYSTICK
struct gameport *gameport;
#endif
#ifdef CONFIG_SND_ES1968_INPUT
struct input_dev *input_dev;
char phys[64]; /* physical device path */
#else
struct snd_kcontrol *master_switch; /* for h/w volume control */
struct snd_kcontrol *master_volume;
#endif
struct work_struct hwvol_work;
#ifdef CONFIG_SND_ES1968_RADIO
struct v4l2_device v4l2_dev;
struct snd_tea575x tea;
unsigned int tea575x_tuner;
#endif
};
static irqreturn_t snd_es1968_interrupt(int irq, void *dev_id);
static const struct pci_device_id snd_es1968_ids[] = {
/* Maestro 1 */
{ 0x1285, 0x0100, PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_MULTIMEDIA_AUDIO << 8, 0xffff00, TYPE_MAESTRO },
/* Maestro 2 */
{ 0x125d, 0x1968, PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_MULTIMEDIA_AUDIO << 8, 0xffff00, TYPE_MAESTRO2 },
/* Maestro 2E */
{ 0x125d, 0x1978, PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_MULTIMEDIA_AUDIO << 8, 0xffff00, TYPE_MAESTRO2E },
{ 0, }
};
MODULE_DEVICE_TABLE(pci, snd_es1968_ids);
/* *********************
* Low Level Funcs! *
*********************/
/* no spinlock */
static void __maestro_write(struct es1968 *chip, u16 reg, u16 data)
{
outw(reg, chip->io_port + ESM_INDEX);
outw(data, chip->io_port + ESM_DATA);
chip->maestro_map[reg] = data;
}
static inline void maestro_write(struct es1968 *chip, u16 reg, u16 data)
{
unsigned long flags;
spin_lock_irqsave(&chip->reg_lock, flags);
__maestro_write(chip, reg, data);
spin_unlock_irqrestore(&chip->reg_lock, flags);
}
/* no spinlock */
static u16 __maestro_read(struct es1968 *chip, u16 reg)
{
if (READABLE_MAP & (1 << reg)) {
outw(reg, chip->io_port + ESM_INDEX);
chip->maestro_map[reg] = inw(chip->io_port + ESM_DATA);
}
return chip->maestro_map[reg];
}
static inline u16 maestro_read(struct es1968 *chip, u16 reg)
{
unsigned long flags;
u16 result;
spin_lock_irqsave(&chip->reg_lock, flags);
result = __maestro_read(chip, reg);
spin_unlock_irqrestore(&chip->reg_lock, flags);
return result;
}
/* Wait for the codec bus to be free */
static int snd_es1968_ac97_wait(struct es1968 *chip)
{
int timeout = 100000;
while (timeout-- > 0) {
if (!(inb(chip->io_port + ESM_AC97_INDEX) & 1))
return 0;
cond_resched();
}
dev_dbg(chip->card->dev, "ac97 timeout\n");
return 1; /* timeout */
}
static int snd_es1968_ac97_wait_poll(struct es1968 *chip)
{
int timeout = 100000;
while (timeout-- > 0) {
if (!(inb(chip->io_port + ESM_AC97_INDEX) & 1))
return 0;
}
dev_dbg(chip->card->dev, "ac97 timeout\n");
return 1; /* timeout */
}
static void snd_es1968_ac97_write(struct snd_ac97 *ac97, unsigned short reg, unsigned short val)
{
struct es1968 *chip = ac97->private_data;
snd_es1968_ac97_wait(chip);
/* Write the bus */
outw(val, chip->io_port + ESM_AC97_DATA);
/*msleep(1);*/
outb(reg, chip->io_port + ESM_AC97_INDEX);
/*msleep(1);*/
}
static unsigned short snd_es1968_ac97_read(struct snd_ac97 *ac97, unsigned short reg)
{
u16 data = 0;
struct es1968 *chip = ac97->private_data;
snd_es1968_ac97_wait(chip);
outb(reg | 0x80, chip->io_port + ESM_AC97_INDEX);
/*msleep(1);*/
if (!snd_es1968_ac97_wait_poll(chip)) {
data = inw(chip->io_port + ESM_AC97_DATA);
/*msleep(1);*/
}
return data;
}
/* no spinlock */
static void apu_index_set(struct es1968 *chip, u16 index)
{
int i;
__maestro_write(chip, IDR1_CRAM_POINTER, index);
for (i = 0; i < 1000; i++)
if (__maestro_read(chip, IDR1_CRAM_POINTER) == index)
return;
dev_dbg(chip->card->dev, "APU register select failed. (Timeout)\n");
}
/* no spinlock */
static void apu_data_set(struct es1968 *chip, u16 data)
{
int i;
for (i = 0; i < 1000; i++) {
if (__maestro_read(chip, IDR0_DATA_PORT) == data)
return;
__maestro_write(chip, IDR0_DATA_PORT, data);
}
dev_dbg(chip->card->dev, "APU register set probably failed (Timeout)!\n");
}
/* no spinlock */
static void __apu_set_register(struct es1968 *chip, u16 channel, u8 reg, u16 data)
{
if (snd_BUG_ON(channel >= NR_APUS))
return;
chip->apu_map[channel][reg] = data;
reg |= (channel << 4);
apu_index_set(chip, reg);
apu_data_set(chip, data);
}
static void apu_set_register(struct es1968 *chip, u16 channel, u8 reg, u16 data)
{
unsigned long flags;
spin_lock_irqsave(&chip->reg_lock, flags);
__apu_set_register(chip, channel, reg, data);
spin_unlock_irqrestore(&chip->reg_lock, flags);
}
static u16 __apu_get_register(struct es1968 *chip, u16 channel, u8 reg)
{
if (snd_BUG_ON(channel >= NR_APUS))
return 0;
reg |= (channel << 4);
apu_index_set(chip, reg);
return __maestro_read(chip, IDR0_DATA_PORT);
}
static u16 apu_get_register(struct es1968 *chip, u16 channel, u8 reg)
{
unsigned long flags;
u16 v;
spin_lock_irqsave(&chip->reg_lock, flags);
v = __apu_get_register(chip, channel, reg);
spin_unlock_irqrestore(&chip->reg_lock, flags);
return v;
}
#if 0 /* ASSP is not supported */
static void assp_set_register(struct es1968 *chip, u32 reg, u32 value)
{
unsigned long flags;
spin_lock_irqsave(&chip->reg_lock, flags);
outl(reg, chip->io_port + ASSP_INDEX);
outl(value, chip->io_port + ASSP_DATA);
spin_unlock_irqrestore(&chip->reg_lock, flags);
}
static u32 assp_get_register(struct es1968 *chip, u32 reg)
{
unsigned long flags;
u32 value;
spin_lock_irqsave(&chip->reg_lock, flags);
outl(reg, chip->io_port + ASSP_INDEX);
value = inl(chip->io_port + ASSP_DATA);
spin_unlock_irqrestore(&chip->reg_lock, flags);
return value;
}
#endif
static void wave_set_register(struct es1968 *chip, u16 reg, u16 value)
{
unsigned long flags;
spin_lock_irqsave(&chip->reg_lock, flags);
outw(reg, chip->io_port + WC_INDEX);
outw(value, chip->io_port + WC_DATA);
spin_unlock_irqrestore(&chip->reg_lock, flags);
}
static u16 wave_get_register(struct es1968 *chip, u16 reg)
{
unsigned long flags;
u16 value;
spin_lock_irqsave(&chip->reg_lock, flags);
outw(reg, chip->io_port + WC_INDEX);
value = inw(chip->io_port + WC_DATA);
spin_unlock_irqrestore(&chip->reg_lock, flags);
return value;
}
/* *******************
* Bob the Timer! *
*******************/
static void snd_es1968_bob_stop(struct es1968 *chip)
{
u16 reg;
reg = __maestro_read(chip, 0x11);
reg &= ~ESM_BOB_ENABLE;
__maestro_write(chip, 0x11, reg);
reg = __maestro_read(chip, 0x17);
reg &= ~ESM_BOB_START;
__maestro_write(chip, 0x17, reg);
}
static void snd_es1968_bob_start(struct es1968 *chip)
{
int prescale;
int divide;
/* compute ideal interrupt frequency for buffer size & play rate */
/* first, find best prescaler value to match freq */
for (prescale = 5; prescale < 12; prescale++)
if (chip->bob_freq > (ESS_SYSCLK >> (prescale + 9)))
break;
/* next, back off prescaler whilst getting divider into optimum range */
divide = 1;
while ((prescale > 5) && (divide < 32)) {
prescale--;
divide <<= 1;
}
divide >>= 1;
/* now fine-tune the divider for best match */
for (; divide < 31; divide++)
if (chip->bob_freq >
((ESS_SYSCLK >> (prescale + 9)) / (divide + 1))) break;
/* divide = 0 is illegal, but don't let prescale = 4! */
if (divide == 0) {
divide++;
if (prescale > 5)
prescale--;
} else if (divide > 1)
divide--;
__maestro_write(chip, 6, 0x9000 | (prescale << 5) | divide); /* set reg */
/* Now set IDR 11/17 */
__maestro_write(chip, 0x11, __maestro_read(chip, 0x11) | 1);
__maestro_write(chip, 0x17, __maestro_read(chip, 0x17) | 1);
}
/* call with substream spinlock */
static void snd_es1968_bob_inc(struct es1968 *chip, int freq)
{
chip->bobclient++;
if (chip->bobclient == 1) {
chip->bob_freq = freq;
snd_es1968_bob_start(chip);
} else if (chip->bob_freq < freq) {
snd_es1968_bob_stop(chip);
chip->bob_freq = freq;
snd_es1968_bob_start(chip);
}
}
/* call with substream spinlock */
static void snd_es1968_bob_dec(struct es1968 *chip)
{
chip->bobclient--;
if (chip->bobclient <= 0)
snd_es1968_bob_stop(chip);
else if (chip->bob_freq > ESM_BOB_FREQ) {
/* check reduction of timer frequency */
int max_freq = ESM_BOB_FREQ;
struct esschan *es;
list_for_each_entry(es, &chip->substream_list, list) {
if (max_freq < es->bob_freq)
max_freq = es->bob_freq;
}
if (max_freq != chip->bob_freq) {
snd_es1968_bob_stop(chip);
chip->bob_freq = max_freq;
snd_es1968_bob_start(chip);
}
}
}
static int
snd_es1968_calc_bob_rate(struct es1968 *chip, struct esschan *es,
struct snd_pcm_runtime *runtime)
{
/* we acquire 4 interrupts per period for precise control.. */
int freq = runtime->rate * 4;
if (es->fmt & ESS_FMT_STEREO)
freq <<= 1;
if (es->fmt & ESS_FMT_16BIT)
freq <<= 1;
freq /= es->frag_size;
if (freq < ESM_BOB_FREQ)
freq = ESM_BOB_FREQ;
else if (freq > ESM_BOB_FREQ_MAX)
freq = ESM_BOB_FREQ_MAX;
return freq;
}
/*************
* PCM Part *
*************/
static u32 snd_es1968_compute_rate(struct es1968 *chip, u32 freq)
{
u32 rate = (freq << 16) / chip->clock;
#if 0 /* XXX: do we need this? */
if (rate > 0x10000)
rate = 0x10000;
#endif
return rate;
}
/* get current pointer */
static inline unsigned int
snd_es1968_get_dma_ptr(struct es1968 *chip, struct esschan *es)
{
unsigned int offset;
offset = apu_get_register(chip, es->apu[0], 5);
offset -= es->base[0];
return (offset & 0xFFFE); /* hardware is in words */
}
static void snd_es1968_apu_set_freq(struct es1968 *chip, int apu, int freq)
{
apu_set_register(chip, apu, 2,
(apu_get_register(chip, apu, 2) & 0x00FF) |
((freq & 0xff) << 8) | 0x10);
apu_set_register(chip, apu, 3, freq >> 8);
}
/* spin lock held */
static inline void snd_es1968_trigger_apu(struct es1968 *esm, int apu, int mode)
{
/* set the APU mode */
__apu_set_register(esm, apu, 0,
(__apu_get_register(esm, apu, 0) & 0xff0f) |
(mode << 4));
}
static void snd_es1968_pcm_start(struct es1968 *chip, struct esschan *es)
{
spin_lock(&chip->reg_lock);
__apu_set_register(chip, es->apu[0], 5, es->base[0]);
snd_es1968_trigger_apu(chip, es->apu[0], es->apu_mode[0]);
if (es->mode == ESM_MODE_CAPTURE) {
__apu_set_register(chip, es->apu[2], 5, es->base[2]);
snd_es1968_trigger_apu(chip, es->apu[2], es->apu_mode[2]);
}
if (es->fmt & ESS_FMT_STEREO) {
__apu_set_register(chip, es->apu[1], 5, es->base[1]);
snd_es1968_trigger_apu(chip, es->apu[1], es->apu_mode[1]);
if (es->mode == ESM_MODE_CAPTURE) {
__apu_set_register(chip, es->apu[3], 5, es->base[3]);
snd_es1968_trigger_apu(chip, es->apu[3], es->apu_mode[3]);
}
}
spin_unlock(&chip->reg_lock);
}
static void snd_es1968_pcm_stop(struct es1968 *chip, struct esschan *es)
{
spin_lock(&chip->reg_lock);
snd_es1968_trigger_apu(chip, es->apu[0], 0);
snd_es1968_trigger_apu(chip, es->apu[1], 0);
if (es->mode == ESM_MODE_CAPTURE) {
snd_es1968_trigger_apu(chip, es->apu[2], 0);
snd_es1968_trigger_apu(chip, es->apu[3], 0);
}
spin_unlock(&chip->reg_lock);
}
/* set the wavecache control reg */
static void snd_es1968_program_wavecache(struct es1968 *chip, struct esschan *es,
int channel, u32 addr, int capture)
{
u32 tmpval = (addr - 0x10) & 0xFFF8;
if (! capture) {
if (!(es->fmt & ESS_FMT_16BIT))
tmpval |= 4; /* 8bit */
if (es->fmt & ESS_FMT_STEREO)
tmpval |= 2; /* stereo */
}
/* set the wavecache control reg */
wave_set_register(chip, es->apu[channel] << 3, tmpval);
es->wc_map[channel] = tmpval;
}
static void snd_es1968_playback_setup(struct es1968 *chip, struct esschan *es,
struct snd_pcm_runtime *runtime)
{
u32 pa;
int high_apu = 0;
int channel, apu;
int i, size;
unsigned long flags;
u32 freq;
size = es->dma_size >> es->wav_shift;
if (es->fmt & ESS_FMT_STEREO)
high_apu++;
for (channel = 0; channel <= high_apu; channel++) {
apu = es->apu[channel];
snd_es1968_program_wavecache(chip, es, channel, es->memory->buf.addr, 0);
/* Offset to PCMBAR */
pa = es->memory->buf.addr;
pa -= chip->dma.addr;
pa >>= 1; /* words */