mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-01 17:56:50 +07:00
6026aa907b
Add two functions to add APB and AHB devices to the amba (PrimeCell) bus dynamically. This is modeled after the static definition macros recently introduced into <linux/amba/bus.h> and can help us in factoring out a bunch of code across the kernel. Since a lot of call sites seem to be using a returned struct amba device* pointer, let's use that. Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
139 lines
4.4 KiB
C
139 lines
4.4 KiB
C
/*
|
|
* linux/include/amba/bus.h
|
|
*
|
|
* This device type deals with ARM PrimeCells and anything else that
|
|
* presents a proper CID (0xB105F00D) at the end of the I/O register
|
|
* region or that is derived from a PrimeCell.
|
|
*
|
|
* Copyright (C) 2003 Deep Blue Solutions Ltd, All Rights Reserved.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
#ifndef ASMARM_AMBA_H
|
|
#define ASMARM_AMBA_H
|
|
|
|
#include <linux/clk.h>
|
|
#include <linux/device.h>
|
|
#include <linux/mod_devicetable.h>
|
|
#include <linux/err.h>
|
|
#include <linux/resource.h>
|
|
#include <linux/regulator/consumer.h>
|
|
|
|
#define AMBA_NR_IRQS 2
|
|
#define AMBA_CID 0xb105f00d
|
|
|
|
struct clk;
|
|
|
|
struct amba_device {
|
|
struct device dev;
|
|
struct resource res;
|
|
struct clk *pclk;
|
|
u64 dma_mask;
|
|
unsigned int periphid;
|
|
unsigned int irq[AMBA_NR_IRQS];
|
|
};
|
|
|
|
struct amba_driver {
|
|
struct device_driver drv;
|
|
int (*probe)(struct amba_device *, const struct amba_id *);
|
|
int (*remove)(struct amba_device *);
|
|
void (*shutdown)(struct amba_device *);
|
|
int (*suspend)(struct amba_device *, pm_message_t);
|
|
int (*resume)(struct amba_device *);
|
|
const struct amba_id *id_table;
|
|
};
|
|
|
|
enum amba_vendor {
|
|
AMBA_VENDOR_ARM = 0x41,
|
|
AMBA_VENDOR_ST = 0x80,
|
|
};
|
|
|
|
extern struct bus_type amba_bustype;
|
|
|
|
#define to_amba_device(d) container_of(d, struct amba_device, dev)
|
|
|
|
#define amba_get_drvdata(d) dev_get_drvdata(&d->dev)
|
|
#define amba_set_drvdata(d,p) dev_set_drvdata(&d->dev, p)
|
|
|
|
int amba_driver_register(struct amba_driver *);
|
|
void amba_driver_unregister(struct amba_driver *);
|
|
struct amba_device *amba_device_alloc(const char *, resource_size_t, size_t);
|
|
void amba_device_put(struct amba_device *);
|
|
int amba_device_add(struct amba_device *, struct resource *);
|
|
int amba_device_register(struct amba_device *, struct resource *);
|
|
struct amba_device *amba_apb_device_add(struct device *parent, const char *name,
|
|
resource_size_t base, size_t size,
|
|
int irq1, int irq2, void *pdata,
|
|
unsigned int periphid);
|
|
struct amba_device *amba_ahb_device_add(struct device *parent, const char *name,
|
|
resource_size_t base, size_t size,
|
|
int irq1, int irq2, void *pdata,
|
|
unsigned int periphid);
|
|
void amba_device_unregister(struct amba_device *);
|
|
struct amba_device *amba_find_device(const char *, struct device *, unsigned int, unsigned int);
|
|
int amba_request_regions(struct amba_device *, const char *);
|
|
void amba_release_regions(struct amba_device *);
|
|
|
|
#define amba_pclk_enable(d) \
|
|
(IS_ERR((d)->pclk) ? 0 : clk_enable((d)->pclk))
|
|
|
|
#define amba_pclk_disable(d) \
|
|
do { if (!IS_ERR((d)->pclk)) clk_disable((d)->pclk); } while (0)
|
|
|
|
/* Some drivers don't use the struct amba_device */
|
|
#define AMBA_CONFIG_BITS(a) (((a) >> 24) & 0xff)
|
|
#define AMBA_REV_BITS(a) (((a) >> 20) & 0x0f)
|
|
#define AMBA_MANF_BITS(a) (((a) >> 12) & 0xff)
|
|
#define AMBA_PART_BITS(a) ((a) & 0xfff)
|
|
|
|
#define amba_config(d) AMBA_CONFIG_BITS((d)->periphid)
|
|
#define amba_rev(d) AMBA_REV_BITS((d)->periphid)
|
|
#define amba_manf(d) AMBA_MANF_BITS((d)->periphid)
|
|
#define amba_part(d) AMBA_PART_BITS((d)->periphid)
|
|
|
|
#define __AMBA_DEV(busid, data, mask) \
|
|
{ \
|
|
.coherent_dma_mask = mask, \
|
|
.init_name = busid, \
|
|
.platform_data = data, \
|
|
}
|
|
|
|
/*
|
|
* APB devices do not themselves have the ability to address memory,
|
|
* so DMA masks should be zero (much like USB peripheral devices.)
|
|
* The DMA controller DMA masks should be used instead (much like
|
|
* USB host controllers in conventional PCs.)
|
|
*/
|
|
#define AMBA_APB_DEVICE(name, busid, id, base, irqs, data) \
|
|
struct amba_device name##_device = { \
|
|
.dev = __AMBA_DEV(busid, data, 0), \
|
|
.res = DEFINE_RES_MEM(base, SZ_4K), \
|
|
.irq = irqs, \
|
|
.periphid = id, \
|
|
}
|
|
|
|
/*
|
|
* AHB devices are DMA capable, so set their DMA masks
|
|
*/
|
|
#define AMBA_AHB_DEVICE(name, busid, id, base, irqs, data) \
|
|
struct amba_device name##_device = { \
|
|
.dev = __AMBA_DEV(busid, data, ~0ULL), \
|
|
.res = DEFINE_RES_MEM(base, SZ_4K), \
|
|
.dma_mask = ~0ULL, \
|
|
.irq = irqs, \
|
|
.periphid = id, \
|
|
}
|
|
|
|
/*
|
|
* module_amba_driver() - Helper macro for drivers that don't do anything
|
|
* special in module init/exit. This eliminates a lot of boilerplate. Each
|
|
* module may only use this macro once, and calling it replaces module_init()
|
|
* and module_exit()
|
|
*/
|
|
#define module_amba_driver(__amba_drv) \
|
|
module_driver(__amba_drv, amba_driver_register, amba_driver_unregister)
|
|
|
|
#endif
|