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181 lines
5.7 KiB
181 lines
5.7 KiB
/* |
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* linux/include/amba/bus.h |
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* |
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* This device type deals with ARM PrimeCells and anything else that |
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* presents a proper CID (0xB105F00D) at the end of the I/O register |
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* region or that is derived from a PrimeCell. |
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* |
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* Copyright (C) 2003 Deep Blue Solutions Ltd, All Rights Reserved. |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License version 2 as |
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* published by the Free Software Foundation. |
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*/ |
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#ifndef ASMARM_AMBA_H |
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#define ASMARM_AMBA_H |
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#include <linux/clk.h> |
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#include <linux/device.h> |
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#include <linux/mod_devicetable.h> |
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#include <linux/err.h> |
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#include <linux/resource.h> |
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#include <linux/regulator/consumer.h> |
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#define AMBA_NR_IRQS 9 |
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#define AMBA_CID 0xb105f00d |
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#define CORESIGHT_CID 0xb105900d |
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struct clk; |
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struct amba_device { |
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struct device dev; |
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struct resource res; |
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struct clk *pclk; |
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unsigned int periphid; |
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unsigned int irq[AMBA_NR_IRQS]; |
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char *driver_override; |
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}; |
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struct amba_driver { |
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struct device_driver drv; |
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int (*probe)(struct amba_device *, const struct amba_id *); |
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int (*remove)(struct amba_device *); |
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void (*shutdown)(struct amba_device *); |
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const struct amba_id *id_table; |
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}; |
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/* |
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* Constants for the designer field of the Peripheral ID register. When bit 7 |
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* is set to '1', bits [6:0] should be the JEP106 manufacturer identity code. |
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*/ |
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enum amba_vendor { |
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AMBA_VENDOR_ARM = 0x41, |
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AMBA_VENDOR_ST = 0x80, |
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AMBA_VENDOR_QCOM = 0x51, |
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AMBA_VENDOR_LSI = 0xb6, |
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AMBA_VENDOR_LINUX = 0xfe, /* This value is not official */ |
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}; |
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/* This is used to generate pseudo-ID for AMBA device */ |
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#define AMBA_LINUX_ID(conf, rev, part) \ |
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(((conf) & 0xff) << 24 | ((rev) & 0xf) << 20 | \ |
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AMBA_VENDOR_LINUX << 12 | ((part) & 0xfff)) |
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extern struct bus_type amba_bustype; |
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#define to_amba_device(d) container_of(d, struct amba_device, dev) |
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#define amba_get_drvdata(d) dev_get_drvdata(&d->dev) |
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#define amba_set_drvdata(d,p) dev_set_drvdata(&d->dev, p) |
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int amba_driver_register(struct amba_driver *); |
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void amba_driver_unregister(struct amba_driver *); |
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struct amba_device *amba_device_alloc(const char *, resource_size_t, size_t); |
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void amba_device_put(struct amba_device *); |
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int amba_device_add(struct amba_device *, struct resource *); |
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int amba_device_register(struct amba_device *, struct resource *); |
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struct amba_device *amba_apb_device_add(struct device *parent, const char *name, |
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resource_size_t base, size_t size, |
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int irq1, int irq2, void *pdata, |
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unsigned int periphid); |
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struct amba_device *amba_ahb_device_add(struct device *parent, const char *name, |
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resource_size_t base, size_t size, |
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int irq1, int irq2, void *pdata, |
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unsigned int periphid); |
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struct amba_device * |
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amba_apb_device_add_res(struct device *parent, const char *name, |
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resource_size_t base, size_t size, int irq1, |
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int irq2, void *pdata, unsigned int periphid, |
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struct resource *resbase); |
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struct amba_device * |
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amba_ahb_device_add_res(struct device *parent, const char *name, |
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resource_size_t base, size_t size, int irq1, |
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int irq2, void *pdata, unsigned int periphid, |
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struct resource *resbase); |
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void amba_device_unregister(struct amba_device *); |
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struct amba_device *amba_find_device(const char *, struct device *, unsigned int, unsigned int); |
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int amba_request_regions(struct amba_device *, const char *); |
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void amba_release_regions(struct amba_device *); |
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static inline int amba_pclk_enable(struct amba_device *dev) |
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{ |
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return clk_enable(dev->pclk); |
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} |
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static inline void amba_pclk_disable(struct amba_device *dev) |
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{ |
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clk_disable(dev->pclk); |
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} |
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static inline int amba_pclk_prepare(struct amba_device *dev) |
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{ |
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return clk_prepare(dev->pclk); |
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} |
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static inline void amba_pclk_unprepare(struct amba_device *dev) |
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{ |
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clk_unprepare(dev->pclk); |
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} |
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/* Some drivers don't use the struct amba_device */ |
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#define AMBA_CONFIG_BITS(a) (((a) >> 24) & 0xff) |
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#define AMBA_REV_BITS(a) (((a) >> 20) & 0x0f) |
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#define AMBA_MANF_BITS(a) (((a) >> 12) & 0xff) |
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#define AMBA_PART_BITS(a) ((a) & 0xfff) |
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#define amba_config(d) AMBA_CONFIG_BITS((d)->periphid) |
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#define amba_rev(d) AMBA_REV_BITS((d)->periphid) |
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#define amba_manf(d) AMBA_MANF_BITS((d)->periphid) |
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#define amba_part(d) AMBA_PART_BITS((d)->periphid) |
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#define __AMBA_DEV(busid, data, mask) \ |
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{ \ |
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.coherent_dma_mask = mask, \ |
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.init_name = busid, \ |
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.platform_data = data, \ |
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} |
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/* |
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* APB devices do not themselves have the ability to address memory, |
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* so DMA masks should be zero (much like USB peripheral devices.) |
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* The DMA controller DMA masks should be used instead (much like |
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* USB host controllers in conventional PCs.) |
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*/ |
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#define AMBA_APB_DEVICE(name, busid, id, base, irqs, data) \ |
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struct amba_device name##_device = { \ |
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.dev = __AMBA_DEV(busid, data, 0), \ |
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.res = DEFINE_RES_MEM(base, SZ_4K), \ |
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.irq = irqs, \ |
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.periphid = id, \ |
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} |
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/* |
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* AHB devices are DMA capable, so set their DMA masks |
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*/ |
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#define AMBA_AHB_DEVICE(name, busid, id, base, irqs, data) \ |
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struct amba_device name##_device = { \ |
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.dev = __AMBA_DEV(busid, data, ~0ULL), \ |
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.res = DEFINE_RES_MEM(base, SZ_4K), \ |
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.irq = irqs, \ |
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.periphid = id, \ |
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} |
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/* |
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* module_amba_driver() - Helper macro for drivers that don't do anything |
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* special in module init/exit. This eliminates a lot of boilerplate. Each |
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* module may only use this macro once, and calling it replaces module_init() |
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* and module_exit() |
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*/ |
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#define module_amba_driver(__amba_drv) \ |
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module_driver(__amba_drv, amba_driver_register, amba_driver_unregister) |
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/* |
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* builtin_amba_driver() - Helper macro for drivers that don't do anything |
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* special in driver initcall. This eliminates a lot of boilerplate. Each |
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* driver may only use this macro once, and calling it replaces the instance |
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* device_initcall(). |
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*/ |
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#define builtin_amba_driver(__amba_drv) \ |
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builtin_driver(__amba_drv, amba_driver_register) |
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#endif
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