diff options
Diffstat (limited to 'sound/pci/echoaudio/echoaudio_dsp.c')
| -rw-r--r-- | sound/pci/echoaudio/echoaudio_dsp.c | 1130 |
1 files changed, 1130 insertions, 0 deletions
diff --git a/sound/pci/echoaudio/echoaudio_dsp.c b/sound/pci/echoaudio/echoaudio_dsp.c new file mode 100644 index 0000000..be0e181 --- /dev/null +++ b/sound/pci/echoaudio/echoaudio_dsp.c @@ -0,0 +1,1130 @@ +/**************************************************************************** + + 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> + +****************************************************************************/ + +#if PAGE_SIZE < 4096 +#error PAGE_SIZE is < 4k +#endif + +static int restore_dsp_rettings(struct echoaudio *chip); + + +/* Some vector commands involve the DSP reading or writing data to and from the +comm page; if you send one of these commands to the DSP, it will complete the +command and then write a non-zero value to the Handshake field in the +comm page. This function waits for the handshake to show up. */ +static int wait_handshake(struct echoaudio *chip) +{ + int i; + + /* Wait up to 20ms for the handshake from the DSP */ + for (i = 0; i < HANDSHAKE_TIMEOUT; i++) { + /* Look for the handshake value */ + barrier(); + if (chip->comm_page->handshake) { + return 0; + } + udelay(1); + } + + snd_printk(KERN_ERR "wait_handshake(): Timeout waiting for DSP\n"); + return -EBUSY; +} + + + +/* Much of the interaction between the DSP and the driver is done via vector +commands; send_vector writes a vector command to the DSP. Typically, this +causes the DSP to read or write fields in the comm page. +PCI posting is not required thanks to the handshake logic. */ +static int send_vector(struct echoaudio *chip, u32 command) +{ + int i; + + wmb(); /* Flush all pending writes before sending the command */ + + /* Wait up to 100ms for the "vector busy" bit to be off */ + for (i = 0; i < VECTOR_BUSY_TIMEOUT; i++) { + if (!(get_dsp_register(chip, CHI32_VECTOR_REG) & + CHI32_VECTOR_BUSY)) { + set_dsp_register(chip, CHI32_VECTOR_REG, command); + /*if (i) DE_ACT(("send_vector time: %d\n", i));*/ + return 0; + } + udelay(1); + } + + DE_ACT((KERN_ERR "timeout on send_vector\n")); + return -EBUSY; +} + + + +/* write_dsp writes a 32-bit value to the DSP; this is used almost +exclusively for loading the DSP. */ +static int write_dsp(struct echoaudio *chip, u32 data) +{ + u32 status, i; + + for (i = 0; i < 10000000; i++) { /* timeout = 10s */ + status = get_dsp_register(chip, CHI32_STATUS_REG); + if ((status & CHI32_STATUS_HOST_WRITE_EMPTY) != 0) { + set_dsp_register(chip, CHI32_DATA_REG, data); + wmb(); /* write it immediately */ + return 0; + } + udelay(1); + cond_resched(); + } + + chip->bad_board = TRUE; /* Set TRUE until DSP re-loaded */ + DE_ACT((KERN_ERR "write_dsp: Set bad_board to TRUE\n")); + return -EIO; +} + + + +/* read_dsp reads a 32-bit value from the DSP; this is used almost +exclusively for loading the DSP and checking the status of the ASIC. */ +static int read_dsp(struct echoaudio *chip, u32 *data) +{ + u32 status, i; + + for (i = 0; i < READ_DSP_TIMEOUT; i++) { + status = get_dsp_register(chip, CHI32_STATUS_REG); + if ((status & CHI32_STATUS_HOST_READ_FULL) != 0) { + *data = get_dsp_register(chip, CHI32_DATA_REG); + return 0; + } + udelay(1); + cond_resched(); + } + + chip->bad_board = TRUE; /* Set TRUE until DSP re-loaded */ + DE_INIT((KERN_ERR "read_dsp: Set bad_board to TRUE\n")); + return -EIO; +} + + + +/**************************************************************************** + Firmware loading functions + ****************************************************************************/ + +/* This function is used to read back the serial number from the DSP; +this is triggered by the SET_COMMPAGE_ADDR command. +Only some early Echogals products have serial numbers in the ROM; +the serial number is not used, but you still need to do this as +part of the DSP load process. */ +static int read_sn(struct echoaudio *chip) +{ + int i; + u32 sn[6]; + + for (i = 0; i < 5; i++) { + if (read_dsp(chip, &sn[i])) { + snd_printk(KERN_ERR "Failed to read serial number\n"); + return -EIO; + } + } + DE_INIT(("Read serial number %08x %08x %08x %08x %08x\n", + sn[0], sn[1], sn[2], sn[3], sn[4])); + return 0; +} + + + +#ifndef ECHOCARD_HAS_ASIC +/* This card has no ASIC, just return ok */ +static inline int check_asic_status(struct echoaudio *chip) +{ + chip->asic_loaded = TRUE; + return 0; +} + +#endif /* !ECHOCARD_HAS_ASIC */ + + + +#ifdef ECHOCARD_HAS_ASIC + +/* Load ASIC code - done after the DSP is loaded */ +static int load_asic_generic(struct echoaudio *chip, u32 cmd, + const struct firmware *asic) +{ + const struct firmware *fw; + int err; + u32 i, size; + u8 *code; + + if ((err = get_firmware(&fw, asic, chip)) < 0) { + snd_printk(KERN_WARNING "Firmware not found !\n"); + return err; + } + + code = (u8 *)fw->data; + size = fw->size; + + /* Send the "Here comes the ASIC" command */ + if (write_dsp(chip, cmd) < 0) + goto la_error; + + /* Write length of ASIC file in bytes */ + if (write_dsp(chip, size) < 0) + goto la_error; + + for (i = 0; i < size; i++) { + if (write_dsp(chip, code[i]) < 0) + goto la_error; + } + + DE_INIT(("ASIC loaded\n")); + free_firmware(fw); + return 0; + +la_error: + DE_INIT(("failed on write_dsp\n")); + free_firmware(fw); + return -EIO; +} + +#endif /* ECHOCARD_HAS_ASIC */ + + + +#ifdef DSP_56361 + +/* Install the resident loader for 56361 DSPs; The resident loader is on +the EPROM on the board for 56301 DSP. The resident loader is a tiny little +program that is used to load the real DSP code. */ +static int install_resident_loader(struct echoaudio *chip) +{ + u32 address; + int index, words, i; + u16 *code; + u32 status; + const struct firmware *fw; + + /* 56361 cards only! This check is required by the old 56301-based + Mona and Gina24 */ + if (chip->device_id != DEVICE_ID_56361) + return 0; + + /* Look to see if the resident loader is present. If the resident + loader is already installed, host flag 5 will be on. */ + status = get_dsp_register(chip, CHI32_STATUS_REG); + if (status & CHI32_STATUS_REG_HF5) { + DE_INIT(("Resident loader already installed; status is 0x%x\n", + status)); + return 0; + } + + if ((i = get_firmware(&fw, &card_fw[FW_361_LOADER], chip)) < 0) { + snd_printk(KERN_WARNING "Firmware not found !\n"); + return i; + } + + /* The DSP code is an array of 16 bit words. The array is divided up + into sections. The first word of each section is the size in words, + followed by the section type. + Since DSP addresses and data are 24 bits wide, they each take up two + 16 bit words in the array. + This is a lot like the other loader loop, but it's not a loop, you + don't write the memory type, and you don't write a zero at the end. */ + + /* Set DSP format bits for 24 bit mode */ + set_dsp_register(chip, CHI32_CONTROL_REG, + get_dsp_register(chip, CHI32_CONTROL_REG) | 0x900); + + code = (u16 *)fw->data; + + /* Skip the header section; the first word in the array is the size + of the first section, so the first real section of code is pointed + to by Code[0]. */ + index = code[0]; + + /* Skip the section size, LRS block type, and DSP memory type */ + index += 3; + + /* Get the number of DSP words to write */ + words = code[index++]; + + /* Get the DSP address for this block; 24 bits, so build from two words */ + address = ((u32)code[index] << 16) + code[index + 1]; + index += 2; + + /* Write the count to the DSP */ + if (write_dsp(chip, words)) { + DE_INIT(("install_resident_loader: Failed to write word count!\n")); + goto irl_error; + } + /* Write the DSP address */ + if (write_dsp(chip, address)) { + DE_INIT(("install_resident_loader: Failed to write DSP address!\n")); + goto irl_error; + } + /* Write out this block of code to the DSP */ + for (i = 0; i < words; i++) { + u32 data; + + data = ((u32)code[index] << 16) + code[index + 1]; + if (write_dsp(chip, data)) { + DE_INIT(("install_resident_loader: Failed to write DSP code\n")); + goto irl_error; + } + index += 2; + } + + /* Wait for flag 5 to come up */ + for (i = 0; i < 200; i++) { /* Timeout is 50us * 200 = 10ms */ + udelay(50); + status = get_dsp_register(chip, CHI32_STATUS_REG); + if (status & CHI32_STATUS_REG_HF5) + break; + } + + if (i == 200) { + DE_INIT(("Resident loader failed to set HF5\n")); + goto irl_error; + } + + DE_INIT(("Resident loader successfully installed\n")); + free_firmware(fw); + return 0; + +irl_error: + free_firmware(fw); + return -EIO; +} + +#endif /* DSP_56361 */ + + +static int load_dsp(struct echoaudio *chip, u16 *code) +{ + u32 address, data; + int index, words, i; + + if (chip->dsp_code == code) { + DE_INIT(("DSP is already loaded!\n")); + return 0; + } + chip->bad_board = TRUE; /* Set TRUE until DSP loaded */ + chip->dsp_code = NULL; /* Current DSP code not loaded */ + chip->asic_loaded = FALSE; /* Loading the DSP code will reset the ASIC */ + + DE_INIT(("load_dsp: Set bad_board to TRUE\n")); + + /* If this board requires a resident loader, install it. */ +#ifdef DSP_56361 + if ((i = install_resident_loader(chip)) < 0) + return i; +#endif + + /* Send software reset command */ + if (send_vector(chip, DSP_VC_RESET) < 0) { + DE_INIT(("LoadDsp: send_vector DSP_VC_RESET failed, Critical Failure\n")); + return -EIO; + } + /* Delay 10us */ + udelay(10); + + /* Wait 10ms for HF3 to indicate that software reset is complete */ + for (i = 0; i < 1000; i++) { /* Timeout is 10us * 1000 = 10ms */ + if (get_dsp_register(chip, CHI32_STATUS_REG) & + CHI32_STATUS_REG_HF3) + break; + udelay(10); + } + + if (i == 1000) { + DE_INIT(("load_dsp: Timeout waiting for CHI32_STATUS_REG_HF3\n")); + return -EIO; + } + + /* Set DSP format bits for 24 bit mode now that soft reset is done */ + set_dsp_register(chip, CHI32_CONTROL_REG, + get_dsp_register(chip, CHI32_CONTROL_REG) | 0x900); + + /* Main loader loop */ + + index = code[0]; + for (;;) { + int block_type, mem_type; + + /* Total Block Size */ + index++; + + /* Block Type */ + block_type = code[index]; + if (block_type == 4) /* We're finished */ + break; + + index++; + + /* Memory Type P=0,X=1,Y=2 */ + mem_type = code[index++]; + + /* Block Code Size */ + words = code[index++]; + if (words == 0) /* We're finished */ + break; + + /* Start Address */ + address = ((u32)code[index] << 16) + code[index + 1]; + index += 2; + + if (write_dsp(chip, words) < 0) { + DE_INIT(("load_dsp: failed to write number of DSP words\n")); + return -EIO; + } + if (write_dsp(chip, address) < 0) { + DE_INIT(("load_dsp: failed to write DSP address\n")); + return -EIO; + } + if (write_dsp(chip, mem_type) < 0) { + DE_INIT(("load_dsp: failed to write DSP memory type\n")); + return -EIO; + } + /* Code */ + for (i = 0; i < words; i++, index+=2) { + data = ((u32)code[index] << 16) + code[index + 1]; + if (write_dsp(chip, data) < 0) { + DE_INIT(("load_dsp: failed to write DSP data\n")); + return -EIO; + } + } + } + + if (write_dsp(chip, 0) < 0) { /* We're done!!! */ + DE_INIT(("load_dsp: Failed to write final zero\n")); + return -EIO; + } + udelay(10); + + for (i = 0; i < 5000; i++) { /* Timeout is 100us * 5000 = 500ms */ + /* Wait for flag 4 - indicates that the DSP loaded OK */ + if (get_dsp_register(chip, CHI32_STATUS_REG) & + CHI32_STATUS_REG_HF4) { + set_dsp_register(chip, CHI32_CONTROL_REG, + get_dsp_register(chip, CHI32_CONTROL_REG) & ~0x1b00); + + if (write_dsp(chip, DSP_FNC_SET_COMMPAGE_ADDR) < 0) { + DE_INIT(("load_dsp: Failed to write DSP_FNC_SET_COMMPAGE_ADDR\n")); + return -EIO; + } + + if (write_dsp(chip, chip->comm_page_phys) < 0) { + DE_INIT(("load_dsp: Failed to write comm page address\n")); + return -EIO; + } + + /* Get the serial number via slave mode. + This is triggered by the SET_COMMPAGE_ADDR command. + We don't actually use the serial number but we have to + get it as part of the DSP init voodoo. */ + if (read_sn(chip) < 0) { + DE_INIT(("load_dsp: Failed to read serial number\n")); + return -EIO; + } + + chip->dsp_code = code; /* Show which DSP code loaded */ + chip->bad_board = FALSE; /* DSP OK */ + DE_INIT(("load_dsp: OK!\n")); + return 0; + } + udelay(100); + } + + DE_INIT(("load_dsp: DSP load timed out waiting for HF4\n")); + return -EIO; +} + + + +/* load_firmware takes care of loading the DSP and any ASIC code. */ +static int load_firmware(struct echoaudio *chip) +{ + const struct firmware *fw; + int box_type, err; + + if (snd_BUG_ON(!chip->dsp_code_to_load || !chip->comm_page)) + return -EPERM; + + /* See if the ASIC is present and working - only if the DSP is already loaded */ + if (chip->dsp_code) { + if ((box_type = check_asic_status(chip)) >= 0) + return box_type; + /* ASIC check failed; force the DSP to reload */ + chip->dsp_code = NULL; + } + + if ((err = get_firmware(&fw, chip->dsp_code_to_load, chip)) < 0) + return err; + err = load_dsp(chip, (u16 *)fw->data); + free_firmware(fw); + if (err < 0) + return err; + + if ((box_type = load_asic(chip)) < 0) + return box_type; /* error */ + + if ((err = restore_dsp_rettings(chip)) < 0) + return err; + + return box_type; +} + + + +/**************************************************************************** + Mixer functions + ****************************************************************************/ + +#if defined(ECHOCARD_HAS_INPUT_NOMINAL_LEVEL) || \ + defined(ECHOCARD_HAS_OUTPUT_NOMINAL_LEVEL) + +/* Set the nominal level for an input or output bus (true = -10dBV, false = +4dBu) */ +static int set_nominal_level(struct echoaudio *chip, u16 index, char consumer) +{ + if (snd_BUG_ON(index >= num_busses_out(chip) + num_busses_in(chip))) + return -EINVAL; + + /* Wait for the handshake (OK even if ASIC is not loaded) */ + if (wait_handshake(chip)) + return -EIO; + + chip->nominal_level[index] = consumer; + + if (consumer) + chip->comm_page->nominal_level_mask |= cpu_to_le32(1 << index); + else + chip->comm_page->nominal_level_mask &= ~cpu_to_le32(1 << index); + + return 0; +} + +#endif /* ECHOCARD_HAS_*_NOMINAL_LEVEL */ + + + +/* Set the gain for a single physical output channel (dB). */ +static int set_output_gain(struct echoaudio *chip, u16 channel, s8 gain) +{ + if (snd_BUG_ON(channel >= num_busses_out(chip))) + return -EINVAL; + + if (wait_handshake(chip)) + return -EIO; + + /* Save the new value */ + chip->output_gain[channel] = gain; + chip->comm_page->line_out_level[channel] = gain; + return 0; +} + + + +#ifdef ECHOCARD_HAS_MONITOR +/* Set the monitor level from an input bus to an output bus. */ +static int set_monitor_gain(struct echoaudio *chip, u16 output, u16 input, + s8 gain) +{ + if (snd_BUG_ON(output >= num_busses_out(chip) || + input >= num_busses_in(chip))) + return -EINVAL; + + if (wait_handshake(chip)) + return -EIO; + + chip->monitor_gain[output][input] = gain; + chip->comm_page->monitors[monitor_index(chip, output, input)] = gain; + return 0; +} +#endif /* ECHOCARD_HAS_MONITOR */ + + +/* Tell the DSP to read and update output, nominal & monitor levels in comm page. */ +static int update_output_line_level(struct echoaudio *chip) +{ + if (wait_handshake(chip)) + return -EIO; + clear_handshake(chip); + return send_vector(chip, DSP_VC_UPDATE_OUTVOL); +} + + + +/* Tell the DSP to read and update input levels in comm page */ +static int update_input_line_level(struct echoaudio *chip) +{ + if (wait_handshake(chip)) + return -EIO; + clear_handshake(chip); + return send_vector(chip, DSP_VC_UPDATE_INGAIN); +} + + + +/* set_meters_on turns the meters on or off. If meters are turned on, the DSP +will write the meter and clock detect values to the comm page at about 30Hz */ +static void set_meters_on(struct echoaudio *chip, char on) +{ + if (on && !chip->meters_enabled) { + send_vector(chip, DSP_VC_METERS_ON); + chip->meters_enabled = 1; + } else if (!on && chip->meters_enabled) { + send_vector(chip, DSP_VC_METERS_OFF); + chip->meters_enabled = 0; + memset((s8 *)chip->comm_page->vu_meter, ECHOGAIN_MUTED, + DSP_MAXPIPES); + memset((s8 *)chip->comm_page->peak_meter, ECHOGAIN_MUTED, + DSP_MAXPIPES); + } +} + + + +/* Fill out an the given array using the current values in the comm page. +Meters are written in the comm page by the DSP in this order: + Output busses + Input busses + Output pipes (vmixer cards only) + +This function assumes there are no more than 16 in/out busses or pipes +Meters is an array [3][16][2] of long. */ +static void get_audio_meters(struct echoaudio *chip, long *meters) +{ + int i, m, n; + + m = 0; + n = 0; + for (i = 0; i < num_busses_out(chip); i++, m++) { + meters[n++] = chip->comm_page->vu_meter[m]; + meters[n++] = chip->comm_page->peak_meter[m]; + } + for (; n < 32; n++) + meters[n] = 0; + +#ifdef ECHOCARD_ECHO3G + m = E3G_MAX_OUTPUTS; /* Skip unused meters */ +#endif + + for (i = 0; i < num_busses_in(chip); i++, m++) { + meters[n++] = chip->comm_page->vu_meter[m]; + meters[n++] = chip->comm_page->peak_meter[m]; + } + for (; n < 64; n++) + meters[n] = 0; + +#ifdef ECHOCARD_HAS_VMIXER + for (i = 0; i < num_pipes_out(chip); i++, m++) { + meters[n++] = chip->comm_page->vu_meter[m]; + meters[n++] = chip->comm_page->peak_meter[m]; + } +#endif + for (; n < 96; n++) + meters[n] = 0; +} + + + +static int restore_dsp_rettings(struct echoaudio *chip) +{ + int err; + DE_INIT(("restore_dsp_settings\n")); + + if ((err = check_asic_status(chip)) < 0) + return err; + + /* @ Gina20/Darla20 only. Should be harmless for other cards. */ + chip->comm_page->gd_clock_state = GD_CLOCK_UNDEF; + chip->comm_page->gd_spdif_status = GD_SPDIF_STATUS_UNDEF; + chip->comm_page->handshake = 0xffffffff; + + if ((err = set_sample_rate(chip, chip->sample_rate)) < 0) + return err; + + if (chip->meters_enabled) + if (send_vector(chip, DSP_VC_METERS_ON) < 0) + return -EIO; + +#ifdef ECHOCARD_HAS_EXTERNAL_CLOCK + if (set_input_clock(chip, chip->input_clock) < 0) + return -EIO; +#endif + +#ifdef ECHOCARD_HAS_OUTPUT_CLOCK_SWITCH + if (set_output_clock(chip, chip->output_clock) < 0) + return -EIO; +#endif + + if (update_output_line_level(chip) < 0) + return -EIO; + + if (update_input_line_level(chip) < 0) + return -EIO; + +#ifdef ECHOCARD_HAS_VMIXER + if (update_vmixer_level(chip) < 0) + return -EIO; +#endif + + if (wait_handshake(chip) < 0) + return -EIO; + clear_handshake(chip); + + DE_INIT(("restore_dsp_rettings done\n")); + return send_vector(chip, DSP_VC_UPDATE_FLAGS); +} + + + +/**************************************************************************** + Transport functions + ****************************************************************************/ + +/* set_audio_format() sets the format of the audio data in host memory for +this pipe. Note that _MS_ (mono-to-stereo) playback modes are not used by ALSA +but they are here because they are just mono while capturing */ +static void set_audio_format(struct echoaudio *chip, u16 pipe_index, + const struct audioformat *format) +{ + u16 dsp_format; + + dsp_format = DSP_AUDIOFORM_SS_16LE; + + /* Look for super-interleave (no big-endian and 8 bits) */ + if (format->interleave > 2) { + switch (format->bits_per_sample) { + case 16: + dsp_format = DSP_AUDIOFORM_SUPER_INTERLEAVE_16LE; + break; + case 24: + dsp_format = DSP_AUDIOFORM_SUPER_INTERLEAVE_24LE; + break; + case 32: + dsp_format = DSP_AUDIOFORM_SUPER_INTERLEAVE_32LE; + break; + } + dsp_format |= format->interleave; + } else if (format->data_are_bigendian) { + /* For big-endian data, only 32 bit samples are supported */ + switch (format->interleave) { + case 1: + dsp_format = DSP_AUDIOFORM_MM_32BE; + break; +#ifdef ECHOCARD_HAS_STEREO_BIG_ENDIAN32 + case 2: + dsp_format = DSP_AUDIOFORM_SS_32BE; + break; +#endif + } + } else if (format->interleave == 1 && + format->bits_per_sample == 32 && !format->mono_to_stereo) { + /* 32 bit little-endian mono->mono case */ + dsp_format = DSP_AUDIOFORM_MM_32LE; + } else { + /* Handle the other little-endian formats */ + switch (format->bits_per_sample) { + case 8: + if (format->interleave == 2) + dsp_format = DSP_AUDIOFORM_SS_8; + else + dsp_format = DSP_AUDIOFORM_MS_8; + break; + default: + case 16: + if (format->interleave == 2) + dsp_format = DSP_AUDIOFORM_SS_16LE; + else + dsp_format = DSP_AUDIOFORM_MS_16LE; + break; + case 24: + if (format->interleave == 2) + dsp_format = DSP_AUDIOFORM_SS_24LE; + else + dsp_format = DSP_AUDIOFORM_MS_24LE; + break; + case 32: + if (format->interleave == 2) + dsp_format = DSP_AUDIOFORM_SS_32LE; + else + dsp_format = DSP_AUDIOFORM_MS_32LE; + break; + } + } + DE_ACT(("set_audio_format[%d] = %x\n", pipe_index, dsp_format)); + chip->comm_page->audio_format[pipe_index] = cpu_to_le16(dsp_format); +} + + + +/* start_transport starts transport for a set of pipes. +The bits 1 in channel_mask specify what pipes to start. Only the bit of the +first channel must be set, regardless its interleave. +Same thing for pause_ and stop_ -trasport below. */ +static int start_transport(struct echoaudio *chip, u32 channel_mask, + u32 cyclic_mask) +{ + DE_ACT(("start_transport %x\n", channel_mask)); + + if (wait_handshake(chip)) + return -EIO; + + chip->comm_page->cmd_start |= cpu_to_le32(channel_mask); + + if (chip->comm_page->cmd_start) { + clear_handshake(chip); + send_vector(chip, DSP_VC_START_TRANSFER); + if (wait_handshake(chip)) + return -EIO; + /* Keep track of which pipes are transporting */ + chip->active_mask |= channel_mask; + chip->comm_page->cmd_start = 0; + return 0; + } + + DE_ACT(("start_transport: No pipes to start!\n")); + return -EINVAL; +} + + + +static int pause_transport(struct echoaudio *chip, u32 channel_mask) +{ + DE_ACT(("pause_transport %x\n", channel_mask)); + + if (wait_handshake(chip)) + return -EIO; + + chip->comm_page->cmd_stop |= cpu_to_le32(channel_mask); + chip->comm_page->cmd_reset = 0; + if (chip->comm_page->cmd_stop) { + clear_handshake(chip); + send_vector(chip, DSP_VC_STOP_TRANSFER); + if (wait_handshake(chip)) + return -EIO; + /* Keep track of which pipes are transporting */ + chip->active_mask &= ~channel_mask; + chip->comm_page->cmd_stop = 0; + chip->comm_page->cmd_reset = 0; + return 0; + } + + DE_ACT(("pause_transport: No pipes to stop!\n")); + return 0; +} + + + +static int stop_transport(struct echoaudio *chip, u32 channel_mask) +{ + DE_ACT(("stop_transport %x\n", channel_mask)); + + if (wait_handshake(chip)) + return -EIO; + + chip->comm_page->cmd_stop |= cpu_to_le32(channel_mask); + chip->comm_page->cmd_reset |= cpu_to_le32(channel_mask); + if (chip->comm_page->cmd_reset) { + clear_handshake(chip); + send_vector(chip, DSP_VC_STOP_TRANSFER); + if (wait_handshake(chip)) + return -EIO; + /* Keep track of which pipes are transporting */ + chip->active_mask &= ~channel_mask; + chip->comm_page->cmd_stop = 0; + chip->comm_page->cmd_reset = 0; + return 0; + } + + DE_ACT(("stop_transport: No pipes to stop!\n")); + return 0; +} + + + +static inline int is_pipe_allocated(struct echoaudio *chip, u16 pipe_index) +{ + return (chip->pipe_alloc_mask & (1 << pipe_index)); +} + + + +/* Stops everything and turns off the DSP. All pipes should be already +stopped and unallocated. */ +static int rest_in_peace(struct echoaudio *chip) +{ + DE_ACT(("rest_in_peace() open=%x\n", chip->pipe_alloc_mask)); + + /* Stops all active pipes (just to be sure) */ + stop_transport(chip, chip->active_mask); + + set_meters_on(chip, FALSE); + +#ifdef ECHOCARD_HAS_MIDI + enable_midi_input(chip, FALSE); +#endif + + /* Go to sleep */ + if (chip->dsp_code) { + /* Make load_firmware do a complete reload */ + chip->dsp_code = NULL; + /* Put the DSP to sleep */ + return send_vector(chip, DSP_VC_GO_COMATOSE); + } + return 0; +} + + + +/* Fills the comm page with default values */ +static int init_dsp_comm_page(struct echoaudio *chip) +{ + /* Check if the compiler added extra padding inside the structure */ + if (offsetof(struct comm_page, midi_output) != 0xbe0) { + DE_INIT(("init_dsp_comm_page() - Invalid struct comm_page structure\n")); + return -EPERM; + } + + /* Init all the basic stuff */ + chip->card_name = ECHOCARD_NAME; + chip->bad_board = TRUE; /* Set TRUE until DSP loaded */ + chip->dsp_code = NULL; /* Current DSP code not loaded */ + chip->digital_mode = DIGITAL_MODE_NONE; + chip->input_clock = ECHO_CLOCK_INTERNAL; + chip->output_clock = ECHO_CLOCK_WORD; + chip->asic_loaded = FALSE; + memset(chip->comm_page, 0, sizeof(struct comm_page)); + + /* Init the comm page */ + chip->comm_page->comm_size = + __constant_cpu_to_le32(sizeof(struct comm_page)); + chip->comm_page->handshake = 0xffffffff; + chip->comm_page->midi_out_free_count = + __constant_cpu_to_le32(DSP_MIDI_OUT_FIFO_SIZE); + chip->comm_page->sample_rate = __constant_cpu_to_le32(44100); + chip->sample_rate = 44100; + + /* Set line levels so we don't blast any inputs on startup */ + memset(chip->comm_page->monitors, ECHOGAIN_MUTED, MONITOR_ARRAY_SIZE); + memset(chip->comm_page->vmixer, ECHOGAIN_MUTED, VMIXER_ARRAY_SIZE); + + return 0; +} + + + +/* This function initializes the several volume controls for busses and pipes. +This MUST be called after the DSP is up and running ! */ +static int init_line_levels(struct echoaudio *chip) +{ + int st, i, o; + + DE_INIT(("init_line_levels\n")); + + /* Mute output busses */ + for (i = 0; i < num_busses_out(chip); i++) + if ((st = set_output_gain(chip, i, ECHOGAIN_MUTED))) + return st; + if ((st = update_output_line_level(chip))) + return st; + +#ifdef ECHOCARD_HAS_VMIXER + /* Mute the Vmixer */ + for (i = 0; i < num_pipes_out(chip); i++) + for (o = 0; o < num_busses_out(chip); o++) + if ((st = set_vmixer_gain(chip, o, i, ECHOGAIN_MUTED))) + return st; + if ((st = update_vmixer_level(chip))) + return st; +#endif /* ECHOCARD_HAS_VMIXER */ + +#ifdef ECHOCARD_HAS_MONITOR + /* Mute the monitor mixer */ + for (o = 0; o < num_busses_out(chip); o++) + for (i = 0; i < num_busses_in(chip); i++) + if ((st = set_monitor_gain(chip, o, i, ECHOGAIN_MUTED))) + return st; + if ((st = update_output_line_level(chip))) + return st; +#endif /* ECHOCARD_HAS_MONITOR */ + +#ifdef ECHOCARD_HAS_INPUT_GAIN + for (i = 0; i < num_busses_in(chip); i++) + if ((st = set_input_gain(chip, i, ECHOGAIN_MUTED))) + return st; + if ((st = update_input_line_level(chip))) + return st; +#endif /* ECHOCARD_HAS_INPUT_GAIN */ + + return 0; +} + + + +/* This is low level part of the interrupt handler. +It returns -1 if the IRQ is not ours, or N>=0 if it is, where N is the number +of midi data in the input queue. */ +static int service_irq(struct echoaudio *chip) +{ + int st; + + /* Read the DSP status register and see if this DSP generated this interrupt */ + if (get_dsp_register(chip, CHI32_STATUS_REG) & CHI32_STATUS_IRQ) { + st = 0; +#ifdef ECHOCARD_HAS_MIDI + /* Get and parse midi data if present */ + if (chip->comm_page->midi_input[0]) /* The count is at index 0 */ + st = midi_service_irq(chip); /* Returns how many midi bytes we received */ +#endif + /* Clear the hardware interrupt */ + chip->comm_page->midi_input[0] = 0; + send_vector(chip, DSP_VC_ACK_INT); + return st; + } + return -1; +} + + + + +/****************************************************************************** + Functions for opening and closing pipes + ******************************************************************************/ + +/* allocate_pipes is used to reserve audio pipes for your exclusive use. +The call will fail if some pipes are already allocated. */ +static int allocate_pipes(struct echoaudio *chip, struct audiopipe *pipe, + int pipe_index, int interleave) +{ + int i; + u32 channel_mask; + char is_cyclic; + + DE_ACT(("allocate_pipes: ch=%d int=%d\n", pipe_index, interleave)); + + if (chip->bad_board) + return -EIO; + + is_cyclic = 1; /* This driver uses cyclic buffers only */ + + for (channel_mask = i = 0; i < interleave; i++) + channel_mask |= 1 << (pipe_index + i); + if (chip->pipe_alloc_mask & channel_mask) { + DE_ACT(("allocate_pipes: channel already open\n")); + return -EAGAIN; + } + + chip->comm_page->position[pipe_index] = 0; + chip->pipe_alloc_mask |= channel_mask; + if (is_cyclic) + chip->pipe_cyclic_mask |= channel_mask; + pipe->index = pipe_index; + pipe->interleave = interleave; + pipe->state = PIPE_STATE_STOPPED; + + /* The counter register is where the DSP writes the 32 bit DMA + position for a pipe. The DSP is constantly updating this value as + it moves data. The DMA counter is in units of bytes, not samples. */ + pipe->dma_counter = &chip->comm_page->position[pipe_index]; + *pipe->dma_counter = 0; + DE_ACT(("allocate_pipes: ok\n")); + return pipe_index; +} + + + +static int free_pipes(struct echoaudio *chip, struct audiopipe *pipe) +{ + u32 channel_mask; + int i; + + DE_ACT(("free_pipes: Pipe %d\n", pipe->index)); + if (snd_BUG_ON(!is_pipe_allocated(chip, pipe->index))) + return -EINVAL; + if (snd_BUG_ON(pipe->state != PIPE_STATE_STOPPED)) + return -EINVAL; + + for (channel_mask = i = 0; i < pipe->interleave; i++) + channel_mask |= 1 << (pipe->index + i); + + chip->pipe_alloc_mask &= ~channel_mask; + chip->pipe_cyclic_mask &= ~channel_mask; + return 0; +} + + + +/****************************************************************************** + Functions for managing the scatter-gather list +******************************************************************************/ + +static int sglist_init(struct echoaudio *chip, struct audiopipe *pipe) +{ + pipe->sglist_head = 0; + memset(pipe->sgpage.area, 0, PAGE_SIZE); + chip->comm_page->sglist_addr[pipe->index].addr = + cpu_to_le32(pipe->sgpage.addr); + return 0; +} + + + +static int sglist_add_mapping(struct echoaudio *chip, struct audiopipe *pipe, + dma_addr_t address, size_t length) +{ + int head = pipe->sglist_head; + struct sg_entry *list = (struct sg_entry *)pipe->sgpage.area; + + if (head < MAX_SGLIST_ENTRIES - 1) { + list[head].addr = cpu_to_le32(address); + list[head].size = cpu_to_le32(length); + pipe->sglist_head++; + } else { + DE_ACT(("SGlist: too many fragments\n")); + return -ENOMEM; + } + return 0; +} + + + +static inline int sglist_add_irq(struct echoaudio *chip, struct audiopipe *pipe) +{ + return sglist_add_mapping(chip, pipe, 0, 0); +} + + + +static inline int sglist_wrap(struct echoaudio *chip, struct audiopipe *pipe) +{ + return sglist_add_mapping(chip, pipe, pipe->sgpage.addr, 0); +} |
