Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) // Copyright (C) 2013,2019 Intel Corporation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4) #include <linux/acpi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) #include <linux/acpi_dma.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) #include "internal.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) static bool dw_dma_acpi_filter(struct dma_chan *chan, void *param)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) 	struct acpi_dma_spec *dma_spec = param;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) 	struct dw_dma_slave slave = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) 		.dma_dev = dma_spec->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) 		.src_id = dma_spec->slave_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 		.dst_id = dma_spec->slave_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 		.m_master = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 		.p_master = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 	};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 	return dw_dma_filter(chan, &slave);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) void dw_dma_acpi_controller_register(struct dw_dma *dw)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 	struct device *dev = dw->dma.dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 	struct acpi_dma_filter_info *info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 	if (!has_acpi_companion(dev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 	info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 	if (!info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 	dma_cap_zero(info->dma_cap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 	dma_cap_set(DMA_SLAVE, info->dma_cap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 	info->filter_fn = dw_dma_acpi_filter;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 	ret = acpi_dma_controller_register(dev, acpi_dma_simple_xlate, info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 		dev_err(dev, "could not register acpi_dma_controller\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) EXPORT_SYMBOL_GPL(dw_dma_acpi_controller_register);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) void dw_dma_acpi_controller_free(struct dw_dma *dw)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 	struct device *dev = dw->dma.dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 	if (!has_acpi_companion(dev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 	acpi_dma_controller_free(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) EXPORT_SYMBOL_GPL(dw_dma_acpi_controller_free);