diff options
Diffstat (limited to '')
| -rw-r--r-- | sound/firewire/dice/dice-extension.c | 175 |
1 files changed, 175 insertions, 0 deletions
diff --git a/sound/firewire/dice/dice-extension.c b/sound/firewire/dice/dice-extension.c new file mode 100644 index 000000000..02f4a8318 --- /dev/null +++ b/sound/firewire/dice/dice-extension.c @@ -0,0 +1,175 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * dice-extension.c - a part of driver for DICE based devices + * + * Copyright (c) 2018 Takashi Sakamoto + */ + +#include "dice.h" + +/* For TCD2210/2220, TCAT defines extension of application protocol. */ + +#define DICE_EXT_APP_SPACE 0xffffe0200000uLL + +#define DICE_EXT_APP_CAPS_OFFSET 0x00 +#define DICE_EXT_APP_CAPS_SIZE 0x04 +#define DICE_EXT_APP_CMD_OFFSET 0x08 +#define DICE_EXT_APP_CMD_SIZE 0x0c +#define DICE_EXT_APP_MIXER_OFFSET 0x10 +#define DICE_EXT_APP_MIXER_SIZE 0x14 +#define DICE_EXT_APP_PEAK_OFFSET 0x18 +#define DICE_EXT_APP_PEAK_SIZE 0x1c +#define DICE_EXT_APP_ROUTER_OFFSET 0x20 +#define DICE_EXT_APP_ROUTER_SIZE 0x24 +#define DICE_EXT_APP_STREAM_OFFSET 0x28 +#define DICE_EXT_APP_STREAM_SIZE 0x2c +#define DICE_EXT_APP_CURRENT_OFFSET 0x30 +#define DICE_EXT_APP_CURRENT_SIZE 0x34 +#define DICE_EXT_APP_STANDALONE_OFFSET 0x38 +#define DICE_EXT_APP_STANDALONE_SIZE 0x3c +#define DICE_EXT_APP_APPLICATION_OFFSET 0x40 +#define DICE_EXT_APP_APPLICATION_SIZE 0x44 + +#define EXT_APP_STREAM_TX_NUMBER 0x0000 +#define EXT_APP_STREAM_RX_NUMBER 0x0004 +#define EXT_APP_STREAM_ENTRIES 0x0008 +#define EXT_APP_STREAM_ENTRY_SIZE 0x010c +#define EXT_APP_NUMBER_AUDIO 0x0000 +#define EXT_APP_NUMBER_MIDI 0x0004 +#define EXT_APP_NAMES 0x0008 +#define EXT_APP_NAMES_SIZE 256 +#define EXT_APP_AC3 0x0108 + +#define EXT_APP_CONFIG_LOW_ROUTER 0x0000 +#define EXT_APP_CONFIG_LOW_STREAM 0x1000 +#define EXT_APP_CONFIG_MIDDLE_ROUTER 0x2000 +#define EXT_APP_CONFIG_MIDDLE_STREAM 0x3000 +#define EXT_APP_CONFIG_HIGH_ROUTER 0x4000 +#define EXT_APP_CONFIG_HIGH_STREAM 0x5000 + +static inline int read_transaction(struct snd_dice *dice, u64 section_addr, + u32 offset, void *buf, size_t len) +{ + return snd_fw_transaction(dice->unit, + len == 4 ? TCODE_READ_QUADLET_REQUEST : + TCODE_READ_BLOCK_REQUEST, + section_addr + offset, buf, len, 0); +} + +static int read_stream_entries(struct snd_dice *dice, u64 section_addr, + u32 base_offset, unsigned int stream_count, + unsigned int mode, + unsigned int pcm_channels[MAX_STREAMS][3], + unsigned int midi_ports[MAX_STREAMS]) +{ + u32 entry_offset; + __be32 reg[2]; + int err; + int i; + + for (i = 0; i < stream_count; ++i) { + entry_offset = base_offset + i * EXT_APP_STREAM_ENTRY_SIZE; + err = read_transaction(dice, section_addr, + entry_offset + EXT_APP_NUMBER_AUDIO, + reg, sizeof(reg)); + if (err < 0) + return err; + pcm_channels[i][mode] = be32_to_cpu(reg[0]); + midi_ports[i] = max(midi_ports[i], be32_to_cpu(reg[1])); + } + + return 0; +} + +static int detect_stream_formats(struct snd_dice *dice, u64 section_addr) +{ + u32 base_offset; + __be32 reg[2]; + unsigned int stream_count; + int mode; + int err = 0; + + for (mode = 0; mode < SND_DICE_RATE_MODE_COUNT; ++mode) { + unsigned int cap; + + /* + * Some models report stream formats at highest mode, however + * they don't support the mode. Check clock capabilities. + */ + if (mode == 2) { + cap = CLOCK_CAP_RATE_176400 | CLOCK_CAP_RATE_192000; + } else if (mode == 1) { + cap = CLOCK_CAP_RATE_88200 | CLOCK_CAP_RATE_96000; + } else { + cap = CLOCK_CAP_RATE_32000 | CLOCK_CAP_RATE_44100 | + CLOCK_CAP_RATE_48000; + } + if (!(cap & dice->clock_caps)) + continue; + + base_offset = 0x2000 * mode + 0x1000; + + err = read_transaction(dice, section_addr, + base_offset + EXT_APP_STREAM_TX_NUMBER, + ®, sizeof(reg)); + if (err < 0) + break; + + base_offset += EXT_APP_STREAM_ENTRIES; + stream_count = be32_to_cpu(reg[0]); + err = read_stream_entries(dice, section_addr, base_offset, + stream_count, mode, + dice->tx_pcm_chs, + dice->tx_midi_ports); + if (err < 0) + break; + + base_offset += stream_count * EXT_APP_STREAM_ENTRY_SIZE; + stream_count = be32_to_cpu(reg[1]); + err = read_stream_entries(dice, section_addr, base_offset, + stream_count, + mode, dice->rx_pcm_chs, + dice->rx_midi_ports); + if (err < 0) + break; + } + + return err; +} + +int snd_dice_detect_extension_formats(struct snd_dice *dice) +{ + __be32 *pointers; + unsigned int i; + u64 section_addr; + int err; + + pointers = kmalloc_array(9, sizeof(__be32) * 2, GFP_KERNEL); + if (pointers == NULL) + return -ENOMEM; + + err = snd_fw_transaction(dice->unit, TCODE_READ_BLOCK_REQUEST, + DICE_EXT_APP_SPACE, pointers, + 9 * sizeof(__be32) * 2, 0); + if (err < 0) + goto end; + + /* Check two of them for offset have the same value or not. */ + for (i = 0; i < 9; ++i) { + int j; + + for (j = i + 1; j < 9; ++j) { + if (pointers[i * 2] == pointers[j * 2]) { + // Fallback to limited functionality. + err = -ENXIO; + goto end; + } + } + } + + section_addr = DICE_EXT_APP_SPACE + be32_to_cpu(pointers[12]) * 4; + err = detect_stream_formats(dice, section_addr); +end: + kfree(pointers); + return err; +} |