1 /* 2 * linux/include/amba/bus.h 3 * 4 * This device type deals with ARM PrimeCells and anything else that 5 * presents a proper CID (0xB105F00D) at the end of the I/O register 6 * region or that is derived from a PrimeCell. 7 * 8 * Copyright (C) 2003 Deep Blue Solutions Ltd, All Rights Reserved. 9 * 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License version 2 as 12 * published by the Free Software Foundation. 13 */ 14 #ifndef ASMARM_AMBA_H 15 #define ASMARM_AMBA_H 16 17 #include <linux/clk.h> 18 #include <linux/device.h> 19 #include <linux/err.h> 20 #include <linux/resource.h> 21 22 #define AMBA_NR_IRQS 2 23 #define AMBA_CID 0xb105f00d 24 25 struct clk; 26 27 struct amba_device { 28 struct device dev; 29 struct resource res; 30 struct clk *pclk; 31 u64 dma_mask; 32 unsigned int periphid; 33 unsigned int irq[AMBA_NR_IRQS]; 34 }; 35 36 struct amba_id { 37 unsigned int id; 38 unsigned int mask; 39 void *data; 40 }; 41 42 struct amba_driver { 43 struct device_driver drv; 44 int (*probe)(struct amba_device *, struct amba_id *); 45 int (*remove)(struct amba_device *); 46 void (*shutdown)(struct amba_device *); 47 int (*suspend)(struct amba_device *, pm_message_t); 48 int (*resume)(struct amba_device *); 49 struct amba_id *id_table; 50 }; 51 52 enum amba_vendor { 53 AMBA_VENDOR_ARM = 0x41, 54 AMBA_VENDOR_ST = 0x80, 55 }; 56 57 #define amba_get_drvdata(d) dev_get_drvdata(&d->dev) 58 #define amba_set_drvdata(d,p) dev_set_drvdata(&d->dev, p) 59 60 int amba_driver_register(struct amba_driver *); 61 void amba_driver_unregister(struct amba_driver *); 62 int amba_device_register(struct amba_device *, struct resource *); 63 void amba_device_unregister(struct amba_device *); 64 struct amba_device *amba_find_device(const char *, struct device *, unsigned int, unsigned int); 65 int amba_request_regions(struct amba_device *, const char *); 66 void amba_release_regions(struct amba_device *); 67 68 #define amba_pclk_enable(d) \ 69 (IS_ERR((d)->pclk) ? 0 : clk_enable((d)->pclk)) 70 71 #define amba_pclk_disable(d) \ 72 do { if (!IS_ERR((d)->pclk)) clk_disable((d)->pclk); } while (0) 73 74 /* Some drivers don't use the struct amba_device */ 75 #define AMBA_CONFIG_BITS(a) (((a) >> 24) & 0xff) 76 #define AMBA_REV_BITS(a) (((a) >> 20) & 0x0f) 77 #define AMBA_MANF_BITS(a) (((a) >> 12) & 0xff) 78 #define AMBA_PART_BITS(a) ((a) & 0xfff) 79 80 #define amba_config(d) AMBA_CONFIG_BITS((d)->periphid) 81 #define amba_rev(d) AMBA_REV_BITS((d)->periphid) 82 #define amba_manf(d) AMBA_MANF_BITS((d)->periphid) 83 #define amba_part(d) AMBA_PART_BITS((d)->periphid) 84 85 #endif 86