mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-28 11:18:45 +07:00
da607e1969
Based on 1 normalized pattern(s): licensed under the terms of the gnu general public license version 2 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 88 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Alexios Zavras <alexios.zavras@intel.com> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190530000437.521539229@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
137 lines
3.5 KiB
C
137 lines
3.5 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* motu-transaction.c - a part of driver for MOTU FireWire series
|
|
*
|
|
* Copyright (c) 2015-2017 Takashi Sakamoto <o-takashi@sakamocchi.jp>
|
|
*/
|
|
|
|
|
|
#include "motu.h"
|
|
|
|
#define SND_MOTU_ADDR_BASE 0xfffff0000000ULL
|
|
#define ASYNC_ADDR_HI 0x0b04
|
|
#define ASYNC_ADDR_LO 0x0b08
|
|
|
|
int snd_motu_transaction_read(struct snd_motu *motu, u32 offset, __be32 *reg,
|
|
size_t size)
|
|
{
|
|
int tcode;
|
|
|
|
if (size % sizeof(__be32) > 0 || size <= 0)
|
|
return -EINVAL;
|
|
if (size == sizeof(__be32))
|
|
tcode = TCODE_READ_QUADLET_REQUEST;
|
|
else
|
|
tcode = TCODE_READ_BLOCK_REQUEST;
|
|
|
|
return snd_fw_transaction(motu->unit, tcode,
|
|
SND_MOTU_ADDR_BASE + offset, reg, size, 0);
|
|
}
|
|
|
|
int snd_motu_transaction_write(struct snd_motu *motu, u32 offset, __be32 *reg,
|
|
size_t size)
|
|
{
|
|
int tcode;
|
|
|
|
if (size % sizeof(__be32) > 0 || size <= 0)
|
|
return -EINVAL;
|
|
if (size == sizeof(__be32))
|
|
tcode = TCODE_WRITE_QUADLET_REQUEST;
|
|
else
|
|
tcode = TCODE_WRITE_BLOCK_REQUEST;
|
|
|
|
return snd_fw_transaction(motu->unit, tcode,
|
|
SND_MOTU_ADDR_BASE + offset, reg, size, 0);
|
|
}
|
|
|
|
static void handle_message(struct fw_card *card, struct fw_request *request,
|
|
int tcode, int destination, int source,
|
|
int generation, unsigned long long offset,
|
|
void *data, size_t length, void *callback_data)
|
|
{
|
|
struct snd_motu *motu = callback_data;
|
|
__be32 *buf = (__be32 *)data;
|
|
unsigned long flags;
|
|
|
|
if (tcode != TCODE_WRITE_QUADLET_REQUEST) {
|
|
fw_send_response(card, request, RCODE_COMPLETE);
|
|
return;
|
|
}
|
|
|
|
if (offset != motu->async_handler.offset || length != 4) {
|
|
fw_send_response(card, request, RCODE_ADDRESS_ERROR);
|
|
return;
|
|
}
|
|
|
|
spin_lock_irqsave(&motu->lock, flags);
|
|
motu->msg = be32_to_cpu(*buf);
|
|
spin_unlock_irqrestore(&motu->lock, flags);
|
|
|
|
fw_send_response(card, request, RCODE_COMPLETE);
|
|
|
|
wake_up(&motu->hwdep_wait);
|
|
}
|
|
|
|
int snd_motu_transaction_reregister(struct snd_motu *motu)
|
|
{
|
|
struct fw_device *device = fw_parent_device(motu->unit);
|
|
__be32 data;
|
|
int err;
|
|
|
|
if (motu->async_handler.callback_data == NULL)
|
|
return -EINVAL;
|
|
|
|
/* Register messaging address. Block transaction is not allowed. */
|
|
data = cpu_to_be32((device->card->node_id << 16) |
|
|
(motu->async_handler.offset >> 32));
|
|
err = snd_motu_transaction_write(motu, ASYNC_ADDR_HI, &data,
|
|
sizeof(data));
|
|
if (err < 0)
|
|
return err;
|
|
|
|
data = cpu_to_be32(motu->async_handler.offset);
|
|
return snd_motu_transaction_write(motu, ASYNC_ADDR_LO, &data,
|
|
sizeof(data));
|
|
}
|
|
|
|
int snd_motu_transaction_register(struct snd_motu *motu)
|
|
{
|
|
static const struct fw_address_region resp_register_region = {
|
|
.start = 0xffffe0000000ull,
|
|
.end = 0xffffe000ffffull,
|
|
};
|
|
int err;
|
|
|
|
/* Perhaps, 4 byte messages are transferred. */
|
|
motu->async_handler.length = 4;
|
|
motu->async_handler.address_callback = handle_message;
|
|
motu->async_handler.callback_data = motu;
|
|
|
|
err = fw_core_add_address_handler(&motu->async_handler,
|
|
&resp_register_region);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
err = snd_motu_transaction_reregister(motu);
|
|
if (err < 0) {
|
|
fw_core_remove_address_handler(&motu->async_handler);
|
|
motu->async_handler.address_callback = NULL;
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
void snd_motu_transaction_unregister(struct snd_motu *motu)
|
|
{
|
|
__be32 data;
|
|
|
|
if (motu->async_handler.address_callback != NULL)
|
|
fw_core_remove_address_handler(&motu->async_handler);
|
|
motu->async_handler.address_callback = NULL;
|
|
|
|
/* Unregister the address. */
|
|
data = cpu_to_be32(0x00000000);
|
|
snd_motu_transaction_write(motu, ASYNC_ADDR_HI, &data, sizeof(data));
|
|
snd_motu_transaction_write(motu, ASYNC_ADDR_LO, &data, sizeof(data));
|
|
}
|