// 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;
}
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