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authorGiuliano Pochini <pochini@shiny.it>2006-06-28 13:53:41 +0200
committerJaroslav Kysela <perex@suse.cz>2006-06-28 19:31:20 +0200
commitdd7b254d8dd3a9528f423ac3bf875e6f0c8da561 (patch)
tree923ac13451c796b730f21c7260beba9f74acff63 /sound/pci/echoaudio/echoaudio_dsp.c
parentcb9d24e4349013628259b5fee97e692173731b07 (diff)
downloadlinux-dd7b254d8dd3a9528f423ac3bf875e6f0c8da561.tar.gz
[ALSA] Add echoaudio sound drivers
From: Giuliano Pochini <pochini@shiny.it>Add echoaudio sound drivers (darla20, darla24, echo3g, gina20, gina24, indigo, indigodj, indigoio, layla20, lala24, mia, mona) Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@suse.cz>
Diffstat (limited to 'sound/pci/echoaudio/echoaudio_dsp.c')
-rw-r--r--sound/pci/echoaudio/echoaudio_dsp.c1125
1 files changed, 1125 insertions, 0 deletions
diff --git a/sound/pci/echoaudio/echoaudio_dsp.c b/sound/pci/echoaudio/echoaudio_dsp.c
new file mode 100644
index 000000000000..42afa837d9b4
--- /dev/null
+++ b/sound/pci/echoaudio/echoaudio_dsp.c
@@ -0,0 +1,1125 @@
+/****************************************************************************
+
+ 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 10ms for the handshake from the DSP */
+ for (i = 0; i < HANDSHAKE_TIMEOUT; i++) {
+ /* Look for the handshake value */
+ if (chip->comm_page->handshake) {
+ /*if (i) DE_ACT(("Handshake time: %d\n", i));*/
+ 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;
+
+ snd_assert(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)
+{
+ snd_assert(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)
+{
+ snd_assert(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)
+{
+ snd_assert(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));
+ snd_assert(is_pipe_allocated(chip, pipe->index), return -EINVAL);
+ snd_assert(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);
+}