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 #include <linux/regulator/consumer.h> 22 23 #define AMBA_NR_IRQS 2 24 #define AMBA_CID 0xb105f00d 25 26 struct clk; 27 28 struct amba_device { 29 struct device dev; 30 struct resource res; 31 struct clk *pclk; 32 struct regulator *vcore; 33 u64 dma_mask; 34 unsigned int periphid; 35 unsigned int irq[AMBA_NR_IRQS]; 36 }; 37 38 struct amba_id { 39 unsigned int id; 40 unsigned int mask; 41 void *data; 42 }; 43 44 struct amba_driver { 45 struct device_driver drv; 46 int (*probe)(struct amba_device *, struct amba_id *); 47 int (*remove)(struct amba_device *); 48 void (*shutdown)(struct amba_device *); 49 int (*suspend)(struct amba_device *, pm_message_t); 50 int (*resume)(struct amba_device *); 51 struct amba_id *id_table; 52 }; 53 54 enum amba_vendor { 55 AMBA_VENDOR_ARM = 0x41, 56 AMBA_VENDOR_ST = 0x80, 57 }; 58 59 #define amba_get_drvdata(d) dev_get_drvdata(&d->dev) 60 #define amba_set_drvdata(d,p) dev_set_drvdata(&d->dev, p) 61 62 int amba_driver_register(struct amba_driver *); 63 void amba_driver_unregister(struct amba_driver *); 64 int amba_device_register(struct amba_device *, struct resource *); 65 void amba_device_unregister(struct amba_device *); 66 struct amba_device *amba_find_device(const char *, struct device *, unsigned int, unsigned int); 67 int amba_request_regions(struct amba_device *, const char *); 68 void amba_release_regions(struct amba_device *); 69 70 #define amba_pclk_enable(d) \ 71 (IS_ERR((d)->pclk) ? 0 : clk_enable((d)->pclk)) 72 73 #define amba_pclk_disable(d) \ 74 do { if (!IS_ERR((d)->pclk)) clk_disable((d)->pclk); } while (0) 75 76 #define amba_vcore_enable(d) \ 77 (IS_ERR((d)->vcore) ? 0 : regulator_enable((d)->vcore)) 78 79 #define amba_vcore_disable(d) \ 80 do { if (!IS_ERR((d)->vcore)) regulator_disable((d)->vcore); } while (0) 81 82 /* Some drivers don't use the struct amba_device */ 83 #define AMBA_CONFIG_BITS(a) (((a) >> 24) & 0xff) 84 #define AMBA_REV_BITS(a) (((a) >> 20) & 0x0f) 85 #define AMBA_MANF_BITS(a) (((a) >> 12) & 0xff) 86 #define AMBA_PART_BITS(a) ((a) & 0xfff) 87 88 #define amba_config(d) AMBA_CONFIG_BITS((d)->periphid) 89 #define amba_rev(d) AMBA_REV_BITS((d)->periphid) 90 #define amba_manf(d) AMBA_MANF_BITS((d)->periphid) 91 #define amba_part(d) AMBA_PART_BITS((d)->periphid) 92 93 #endif 94