--- /dev/null
+/****************************************************************************
+
+ Copyright Echo Digital Audio Corporation (c) 1998 - 2004
+ All rights reserved
+ www.echoaudio.com
+
+ This file is part of Echo Digital Audio's generic driver library.
+
+ Echo Digital Audio's generic driver library is free software;
+ you can redistribute it and/or modify it under the terms of
+ the GNU General Public License 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., 59 Temple Place - Suite 330, Boston,
+ MA 02111-1307, USA.
+
+ ****************************************************************************
+
+ Translation from C++ and adaptation for use in ALSA-Driver
+ were made by Giuliano Pochini <pochini@shiny.it>
+
+ ****************************************************************************
+
+
+ Here's a block diagram of how most of the cards work:
+
+ +-----------+
+ record | |<-------------------- Inputs
+ <-------| | |
+ PCI | Transport | |
+ bus | engine | \|/
+ ------->| | +-------+
+ play | |--->|monitor|-------> Outputs
+ +-----------+ | mixer |
+ +-------+
+
+ The lines going to and from the PCI bus represent "pipes". A pipe performs
+ audio transport - moving audio data to and from buffers on the host via
+ bus mastering.
+
+ The inputs and outputs on the right represent input and output "busses."
+ A bus is a physical, real connection to the outside world. An example
+ of a bus would be the 1/4" analog connectors on the back of Layla or
+ an RCA S/PDIF connector.
+
+ For most cards, there is a one-to-one correspondence between outputs
+ and busses; that is, each individual pipe is hard-wired to a single bus.
+
+ Cards that work this way are Darla20, Gina20, Layla20, Darla24, Gina24,
+ Layla24, Mona, and Indigo.
+
+
+ Mia has a feature called "virtual outputs."
+
+
+ +-----------+
+ record | |<----------------------------- Inputs
+ <-------| | |
+ PCI | Transport | |
+ bus | engine | \|/
+ ------->| | +------+ +-------+
+ play | |-->|vmixer|-->|monitor|-------> Outputs
+ +-----------+ +------+ | mixer |
+ +-------+
+
+
+ Obviously, the difference here is the box labeled "vmixer." Vmixer is
+ short for "virtual output mixer." For Mia, pipes are *not* hard-wired
+ to a single bus; the vmixer lets you mix any pipe to any bus in any
+ combination.
+
+ Note, however, that the left-hand side of the diagram is unchanged.
+ Transport works exactly the same way - the difference is in the mixer stage.
+
+
+ Pipes and busses are numbered starting at zero.
+
+
+
+ Pipe index
+ ==========
+
+ A number of calls in CEchoGals refer to a "pipe index". A pipe index is
+ a unique number for a pipe that unambiguously refers to a playback or record
+ pipe. Pipe indices are numbered starting with analog outputs, followed by
+ digital outputs, then analog inputs, then digital inputs.
+
+ Take Gina24 as an example:
+
+ Pipe index
+
+ 0-7 Analog outputs (0 .. FirstDigitalBusOut-1)
+ 8-15 Digital outputs (FirstDigitalBusOut .. NumBussesOut-1)
+ 16-17 Analog inputs
+ 18-25 Digital inputs
+
+
+ You get the pipe index by calling CEchoGals::OpenAudio; the other transport
+ functions take the pipe index as a parameter. If you need a pipe index for
+ some other reason, use the handy Makepipe_index method.
+
+
+ Some calls take a CChannelMask parameter; CChannelMask is a handy way to
+ group pipe indices.
+
+
+
+ Digital mode switch
+ ===================
+
+ Some cards (right now, Gina24, Layla24, and Mona) have a Digital Mode Switch
+ or DMS. Cards with a DMS can be set to one of three mutually exclusive
+ digital modes: S/PDIF RCA, S/PDIF optical, or ADAT optical.
+
+ This may create some confusion since ADAT optical is 8 channels wide and
+ S/PDIF is only two channels wide. Gina24, Layla24, and Mona handle this
+ by acting as if they always have 8 digital outs and ins. If you are in
+ either S/PDIF mode, the last 6 channels don't do anything - data sent
+ out these channels is thrown away and you will always record zeros.
+
+ Note that with Gina24, Layla24, and Mona, sample rates above 50 kHz are
+ only available if you have the card configured for S/PDIF optical or S/PDIF
+ RCA.
+
+
+
+ Double speed mode
+ =================
+
+ Some of the cards support 88.2 kHz and 96 kHz sampling (Darla24, Gina24,
+ Layla24, Mona, Mia, and Indigo). For these cards, the driver sometimes has
+ to worry about "double speed mode"; double speed mode applies whenever the
+ sampling rate is above 50 kHz.
+
+ For instance, Mona and Layla24 support word clock sync. However, they
+ actually support two different word clock modes - single speed (below
+ 50 kHz) and double speed (above 50 kHz). The hardware detects if a single
+ or double speed word clock signal is present; the generic code uses that
+ information to determine which mode to use.
+
+ The generic code takes care of all this for you.
+*/
+
+
+#ifndef _ECHOAUDIO_H_
+#define _ECHOAUDIO_H_
+
+
+#define TRUE 1
+#define FALSE 0
+
+#include "echoaudio_dsp.h"
+
+
+
+/***********************************************************************
+
+ PCI configuration space
+
+***********************************************************************/
+
+/*
+ * PCI vendor ID and device IDs for the hardware
+ */
+#define VENDOR_ID 0x1057
+#define DEVICE_ID_56301 0x1801
+#define DEVICE_ID_56361 0x3410
+#define SUBVENDOR_ID 0xECC0
+
+
+/*
+ * Valid Echo PCI subsystem card IDs
+ */
+#define DARLA20 0x0010
+#define GINA20 0x0020
+#define LAYLA20 0x0030
+#define DARLA24 0x0040
+#define GINA24 0x0050
+#define LAYLA24 0x0060
+#define MONA 0x0070
+#define MIA 0x0080
+#define INDIGO 0x0090
+#define INDIGO_IO 0x00a0
+#define INDIGO_DJ 0x00b0
+#define ECHO3G 0x0100
+
+
+/************************************************************************
+
+ Array sizes and so forth
+
+***********************************************************************/
+
+/*
+ * Sizes
+ */
+#define ECHO_MAXAUDIOINPUTS 32 /* Max audio input channels */
+#define ECHO_MAXAUDIOOUTPUTS 32 /* Max audio output channels */
+#define ECHO_MAXAUDIOPIPES 32 /* Max number of input and output
+ * pipes */
+#define E3G_MAX_OUTPUTS 16
+#define ECHO_MAXMIDIJACKS 1 /* Max MIDI ports */
+#define ECHO_MIDI_QUEUE_SZ 512 /* Max MIDI input queue entries */
+#define ECHO_MTC_QUEUE_SZ 32 /* Max MIDI time code input queue
+ * entries */
+
+/*
+ * MIDI activity indicator timeout
+ */
+#define MIDI_ACTIVITY_TIMEOUT_USEC 200000
+
+
+/****************************************************************************
+
+ Clocks
+
+*****************************************************************************/
+
+/*
+ * Clock numbers
+ */
+#define ECHO_CLOCK_INTERNAL 0
+#define ECHO_CLOCK_WORD 1
+#define ECHO_CLOCK_SUPER 2
+#define ECHO_CLOCK_SPDIF 3
+#define ECHO_CLOCK_ADAT 4
+#define ECHO_CLOCK_ESYNC 5
+#define ECHO_CLOCK_ESYNC96 6
+#define ECHO_CLOCK_MTC 7
+#define ECHO_CLOCK_NUMBER 8
+#define ECHO_CLOCKS 0xffff
+
+/*
+ * Clock bit numbers - used to report capabilities and whatever clocks
+ * are being detected dynamically.
+ */
+#define ECHO_CLOCK_BIT_INTERNAL (1 << ECHO_CLOCK_INTERNAL)
+#define ECHO_CLOCK_BIT_WORD (1 << ECHO_CLOCK_WORD)
+#define ECHO_CLOCK_BIT_SUPER (1 << ECHO_CLOCK_SUPER)
+#define ECHO_CLOCK_BIT_SPDIF (1 << ECHO_CLOCK_SPDIF)
+#define ECHO_CLOCK_BIT_ADAT (1 << ECHO_CLOCK_ADAT)
+#define ECHO_CLOCK_BIT_ESYNC (1 << ECHO_CLOCK_ESYNC)
+#define ECHO_CLOCK_BIT_ESYNC96 (1 << ECHO_CLOCK_ESYNC96)
+#define ECHO_CLOCK_BIT_MTC (1<<ECHO_CLOCK_MTC)
+
+
+/***************************************************************************
+
+ Digital modes
+
+****************************************************************************/
+
+/*
+ * Digital modes for Mona, Layla24, and Gina24
+ */
+#define DIGITAL_MODE_NONE 0xFF
+#define DIGITAL_MODE_SPDIF_RCA 0
+#define DIGITAL_MODE_SPDIF_OPTICAL 1
+#define DIGITAL_MODE_ADAT 2
+#define DIGITAL_MODE_SPDIF_CDROM 3
+#define DIGITAL_MODES 4
+
+/*
+ * Digital mode capability masks
+ */
+#define ECHOCAPS_HAS_DIGITAL_MODE_SPDIF_RCA (1 << DIGITAL_MODE_SPDIF_RCA)
+#define ECHOCAPS_HAS_DIGITAL_MODE_SPDIF_OPTICAL (1 << DIGITAL_MODE_SPDIF_OPTICAL)
+#define ECHOCAPS_HAS_DIGITAL_MODE_ADAT (1 << DIGITAL_MODE_ADAT)
+#define ECHOCAPS_HAS_DIGITAL_MODE_SPDIF_CDROM (1 << DIGITAL_MODE_SPDIF_CDROM)
+
+
+#define EXT_3GBOX_NC 0x01 /* 3G box not connected */
+#define EXT_3GBOX_NOT_SET 0x02 /* 3G box not detected yet */
+
+
+#define ECHOGAIN_MUTED (-128) /* Minimum possible gain */
+#define ECHOGAIN_MINOUT (-128) /* Min output gain (dB) */
+#define ECHOGAIN_MAXOUT (6) /* Max output gain (dB) */
+#define ECHOGAIN_MININP (-50) /* Min input gain (0.5 dB) */
+#define ECHOGAIN_MAXINP (50) /* Max input gain (0.5 dB) */
+
+#define PIPE_STATE_STOPPED 0 /* Pipe has been reset */
+#define PIPE_STATE_PAUSED 1 /* Pipe has been stopped */
+#define PIPE_STATE_STARTED 2 /* Pipe has been started */
+#define PIPE_STATE_PENDING 3 /* Pipe has pending start */
+
+
+/* Debug initialization */
+#ifdef CONFIG_SND_DEBUG
+#define DE_INIT(x) snd_printk x
+#else
+#define DE_INIT(x)
+#endif
+
+/* Debug hw_params callbacks */
+#ifdef CONFIG_SND_DEBUG
+#define DE_HWP(x) snd_printk x
+#else
+#define DE_HWP(x)
+#endif
+
+/* Debug normal activity (open, start, stop...) */
+#ifdef CONFIG_SND_DEBUG
+#define DE_ACT(x) snd_printk x
+#else
+#define DE_ACT(x)
+#endif
+
+/* Debug midi activity */
+#ifdef CONFIG_SND_DEBUG
+#define DE_MID(x) snd_printk x
+#else
+#define DE_MID(x)
+#endif
+
+
+struct audiopipe {
+ volatile u32 *dma_counter; /* Commpage register that contains
+ * the current dma position
+ * (lower 32 bits only)
+ */
+ u32 last_counter; /* The last position, which is used
+ * to compute...
+ */
+ u32 position; /* ...the number of bytes tranferred
+ * by the DMA engine, modulo the
+ * buffer size
+ */
+ short index; /* Index of the first channel or <0
+ * if hw is not configured yet
+ */
+ short interleave;
+ struct snd_dma_buffer sgpage; /* Room for the scatter-gather list */
+ struct snd_pcm_hardware hw;
+ struct snd_pcm_hw_constraint_list constr;
+ short sglist_head;
+ char state; /* pipe state */
+};
+
+
+struct audioformat {
+ u8 interleave; /* How the data is arranged in memory:
+ * mono = 1, stereo = 2, ...
+ */
+ u8 bits_per_sample; /* 8, 16, 24, 32 (24 bits left aligned) */
+ char mono_to_stereo; /* Only used if interleave is 1 and
+ * if this is an output pipe.
+ */
+ char data_are_bigendian; /* 1 = big endian, 0 = little endian */
+};
+
+
+struct echoaudio {
+ spinlock_t lock;
+ struct snd_pcm_substream *substream[DSP_MAXPIPES];
+ int last_period[DSP_MAXPIPES];
+ struct semaphore mode_mutex;
+ u16 num_digital_modes, digital_mode_list[6];
+ u16 num_clock_sources, clock_source_list[10];
+ atomic_t opencount;
+ struct snd_kcontrol *clock_src_ctl;
+ struct snd_pcm *analog_pcm, *digital_pcm;
+ struct snd_card *card;
+ const char *card_name;
+ struct pci_dev *pci;
+ unsigned long dsp_registers_phys;
+ struct resource *iores;
+ struct snd_dma_buffer commpage_dma_buf;
+ int irq;
+#ifdef ECHOCARD_HAS_MIDI
+ struct snd_rawmidi *rmidi;
+ struct snd_rawmidi_substream *midi_in, *midi_out;
+#endif
+ struct timer_list timer;
+ char tinuse; /* Timer in use */
+ char midi_full; /* MIDI output buffer is full */
+ char can_set_rate;
+ char rate_set;
+
+ /* This stuff is used mainly by the lowlevel code */
+ struct comm_page *comm_page; /* Virtual address of the memory
+ * seen by DSP
+ */
+ u32 pipe_alloc_mask; /* Bitmask of allocated pipes */
+ u32 pipe_cyclic_mask; /* Bitmask of pipes with cyclic
+ * buffers
+ */
+ u32 sample_rate; /* Card sample rate in Hz */
+ u8 digital_mode; /* Current digital mode
+ * (see DIGITAL_MODE_*)
+ */
+ u8 spdif_status; /* Gina20, Darla20, Darla24 - only */
+ u8 clock_state; /* Gina20, Darla20, Darla24 - only */
+ u8 input_clock; /* Currently selected sample clock
+ * source
+ */
+ u8 output_clock; /* Layla20 only */
+ char meters_enabled; /* VU-meters status */
+ char asic_loaded; /* Set TRUE when ASIC loaded */
+ char bad_board; /* Set TRUE if DSP won't load */
+ char professional_spdif; /* 0 = consumer; 1 = professional */
+ char non_audio_spdif; /* 3G - only */
+ char digital_in_automute; /* Gina24, Layla24, Mona - only */
+ char has_phantom_power;
+ char hasnt_input_nominal_level; /* Gina3G */
+ char phantom_power; /* Gina3G - only */
+ char has_midi;
+ char midi_input_enabled;
+
+#ifdef ECHOCARD_ECHO3G
+ /* External module -dependent pipe and bus indexes */
+ char px_digital_out, px_analog_in, px_digital_in, px_num;
+ char bx_digital_out, bx_analog_in, bx_digital_in, bx_num;
+#endif
+
+ char nominal_level[ECHO_MAXAUDIOPIPES]; /* True == -10dBV
+ * False == +4dBu */
+ s8 input_gain[ECHO_MAXAUDIOINPUTS]; /* Input level -50..+50
+ * unit is 0.5dB */
+ s8 output_gain[ECHO_MAXAUDIOOUTPUTS]; /* Output level -128..+6 dB
+ * (-128=muted) */
+ s8 monitor_gain[ECHO_MAXAUDIOOUTPUTS][ECHO_MAXAUDIOINPUTS];
+ /* -128..+6 dB */
+ s8 vmixer_gain[ECHO_MAXAUDIOOUTPUTS][ECHO_MAXAUDIOOUTPUTS];
+ /* -128..+6 dB */
+
+ u16 digital_modes; /* Bitmask of supported modes
+ * (see ECHOCAPS_HAS_DIGITAL_MODE_*) */
+ u16 input_clock_types; /* Suppoted input clock types */
+ u16 output_clock_types; /* Suppoted output clock types -
+ * Layla20 only */
+ u16 device_id, subdevice_id;
+ u16 *dsp_code; /* Current DSP code loaded,
+ * NULL if nothing loaded */
+ const struct firmware *dsp_code_to_load;/* DSP code to load */
+ const struct firmware *asic_code; /* Current ASIC code */
+ u32 comm_page_phys; /* Physical address of the
+ * memory seen by DSP */
+ volatile u32 __iomem *dsp_registers; /* DSP's register base */
+ u32 active_mask; /* Chs. active mask or
+ * punks out */
+
+#ifdef ECHOCARD_HAS_MIDI
+ u16 mtc_state; /* State for MIDI input parsing state machine */
+ u8 midi_buffer[MIDI_IN_BUFFER_SIZE];
+#endif
+};
+
+
+static int init_dsp_comm_page(struct echoaudio *chip);
+static int init_line_levels(struct echoaudio *chip);
+static int free_pipes(struct echoaudio *chip, struct audiopipe *pipe);
+static int load_firmware(struct echoaudio *chip);
+static int wait_handshake(struct echoaudio *chip);
+static int send_vector(struct echoaudio *chip, u32 command);
+static int get_firmware(const struct firmware **fw_entry,
+ const struct firmware *frm, struct echoaudio *chip);
+static void free_firmware(const struct firmware *fw_entry);
+
+#ifdef ECHOCARD_HAS_MIDI
+static int enable_midi_input(struct echoaudio *chip, char enable);
+static int midi_service_irq(struct echoaudio *chip);
+static int __devinit snd_echo_midi_create(struct snd_card *card,
+ struct echoaudio *chip);
+#endif
+
+
+static inline void clear_handshake(struct echoaudio *chip)
+{
+ chip->comm_page->handshake = 0;
+}
+
+static inline u32 get_dsp_register(struct echoaudio *chip, u32 index)
+{
+ return readl(&chip->dsp_registers[index]);
+}
+
+static inline void set_dsp_register(struct echoaudio *chip, u32 index,
+ u32 value)
+{
+ writel(value, &chip->dsp_registers[index]);
+}
+
+
+/* Pipe and bus indexes. PX_* and BX_* are defined as chip->px_* and chip->bx_*
+for 3G cards because they depend on the external box. They are integer
+constants for all other cards.
+Never use those defines directly, use the following functions instead. */
+
+static inline int px_digital_out(const struct echoaudio *chip)
+{
+ return PX_DIGITAL_OUT;
+}
+
+static inline int px_analog_in(const struct echoaudio *chip)
+{
+ return PX_ANALOG_IN;
+}
+
+static inline int px_digital_in(const struct echoaudio *chip)
+{
+ return PX_DIGITAL_IN;
+}
+
+static inline int px_num(const struct echoaudio *chip)
+{
+ return PX_NUM;
+}
+
+static inline int bx_digital_out(const struct echoaudio *chip)
+{
+ return BX_DIGITAL_OUT;
+}
+
+static inline int bx_analog_in(const struct echoaudio *chip)
+{
+ return BX_ANALOG_IN;
+}
+
+static inline int bx_digital_in(const struct echoaudio *chip)
+{
+ return BX_DIGITAL_IN;
+}
+
+static inline int bx_num(const struct echoaudio *chip)
+{
+ return BX_NUM;
+}
+
+static inline int num_pipes_out(const struct echoaudio *chip)
+{
+ return px_analog_in(chip);
+}
+
+static inline int num_pipes_in(const struct echoaudio *chip)
+{
+ return px_num(chip) - px_analog_in(chip);
+}
+
+static inline int num_busses_out(const struct echoaudio *chip)
+{
+ return bx_analog_in(chip);
+}
+
+static inline int num_busses_in(const struct echoaudio *chip)
+{
+ return bx_num(chip) - bx_analog_in(chip);
+}
+
+static inline int num_analog_busses_out(const struct echoaudio *chip)
+{
+ return bx_digital_out(chip);
+}
+
+static inline int num_analog_busses_in(const struct echoaudio *chip)
+{
+ return bx_digital_in(chip) - bx_analog_in(chip);
+}
+
+static inline int num_digital_busses_out(const struct echoaudio *chip)
+{
+ return num_busses_out(chip) - num_analog_busses_out(chip);
+}
+
+static inline int num_digital_busses_in(const struct echoaudio *chip)
+{
+ return num_busses_in(chip) - num_analog_busses_in(chip);
+}
+
+/* The monitor array is a one-dimensional array; compute the offset
+ * into the array */
+static inline int monitor_index(const struct echoaudio *chip, int out, int in)
+{
+ return out * num_busses_in(chip) + in;
+}
+
+
+#ifndef pci_device
+#define pci_device(chip) (&chip->pci->dev)
+#endif
+
+
+#endif /* _ECHOAUDIO_H_ */
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