mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-23 19:43:33 +00:00
51050ff0a2
Currently both pirq_reg_to_linkno() and pirq_linkno_to_reg() assume consecutive PIRQ routing control registers. But this is not always the case on some platforms. Introduce a new device tree property intel,pirq-regmap to describe how the PIRQ routing register offset is mapped to the link number and adjust the irq router driver to utilize the mapping. Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Simon Glass <sjg@chromium.org>
67 lines
1.6 KiB
C
67 lines
1.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
|
|
/*
|
|
* Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com>
|
|
*/
|
|
|
|
#ifndef _ARCH_IRQ_H_
|
|
#define _ARCH_IRQ_H_
|
|
|
|
#include <dt-bindings/interrupt-router/intel-irq.h>
|
|
|
|
/**
|
|
* Intel interrupt router configuration mechanism
|
|
*
|
|
* There are two known ways of Intel interrupt router configuration mechanism
|
|
* so far. On most cases, the IRQ routing configuraiton is controlled by PCI
|
|
* configuraiton registers on the legacy bridge, normally PCI BDF(0, 31, 0).
|
|
* On some newer platforms like BayTrail and Braswell, the IRQ routing is now
|
|
* in the IBASE register block where IBASE is memory-mapped.
|
|
*/
|
|
enum pirq_config {
|
|
PIRQ_VIA_PCI,
|
|
PIRQ_VIA_IBASE
|
|
};
|
|
|
|
struct pirq_regmap {
|
|
int link;
|
|
int offset;
|
|
};
|
|
|
|
/**
|
|
* Intel interrupt router control block
|
|
*
|
|
* Its members' value will be filled in based on device tree's input.
|
|
*
|
|
* @config: PIRQ_VIA_PCI or PIRQ_VIA_IBASE
|
|
* @link_base: link value base number
|
|
* @link_num: number of PIRQ links supported
|
|
* @has_regmap: has mapping table between PIRQ link and routing register offset
|
|
* @irq_mask: IRQ mask reprenting the 16 IRQs in 8259, bit N is 1 means
|
|
* IRQ N is available to be routed
|
|
* @lb_bdf: irq router's PCI bus/device/function number encoding
|
|
* @ibase: IBASE register block base address
|
|
* @actl_8bit: ACTL register width is 8-bit (for ICH series chipset)
|
|
* @actl_addr: ACTL register offset
|
|
*/
|
|
struct irq_router {
|
|
int config;
|
|
u32 link_base;
|
|
int link_num;
|
|
bool has_regmap;
|
|
struct pirq_regmap *regmap;
|
|
u16 irq_mask;
|
|
u32 bdf;
|
|
u32 ibase;
|
|
bool actl_8bit;
|
|
int actl_addr;
|
|
};
|
|
|
|
struct pirq_routing {
|
|
int bdf;
|
|
int pin;
|
|
int pirq;
|
|
};
|
|
|
|
#define PIRQ_BITMAP 0xdef8
|
|
|
|
#endif /* _ARCH_IRQ_H_ */
|