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/mod_devicetable.h> 20 #include <linux/err.h> 21 #include <linux/resource.h> 22 #include <linux/regulator/consumer.h> 23 24 #define AMBA_NR_IRQS 2 25 #define AMBA_CID 0xb105f00d 26 27 struct clk; 28 29 struct amba_device { 30 struct device dev; 31 struct resource res; 32 struct clk *pclk; 33 struct regulator *vcore; 34 u64 dma_mask; 35 unsigned int periphid; 36 unsigned int irq[AMBA_NR_IRQS]; 37 }; 38 39 struct amba_driver { 40 struct device_driver drv; 41 int (*probe)(struct amba_device *, const struct amba_id *); 42 int (*remove)(struct amba_device *); 43 void (*shutdown)(struct amba_device *); 44 int (*suspend)(struct amba_device *, pm_message_t); 45 int (*resume)(struct amba_device *); 46 const struct amba_id *id_table; 47 }; 48 49 enum amba_vendor { 50 AMBA_VENDOR_ARM = 0x41, 51 AMBA_VENDOR_ST = 0x80, 52 }; 53 54 extern struct bus_type amba_bustype; 55 56 #define to_amba_device(d) container_of(d, struct amba_device, dev) 57 58 #define amba_get_drvdata(d) dev_get_drvdata(&d->dev) 59 #define amba_set_drvdata(d,p) dev_set_drvdata(&d->dev, p) 60 61 int amba_driver_register(struct amba_driver *); 62 void amba_driver_unregister(struct amba_driver *); 63 int amba_device_register(struct amba_device *, struct resource *); 64 void amba_device_unregister(struct amba_device *); 65 struct amba_device *amba_find_device(const char *, struct device *, unsigned int, unsigned int); 66 int amba_request_regions(struct amba_device *, const char *); 67 void amba_release_regions(struct amba_device *); 68 69 #define amba_pclk_enable(d) \ 70 (IS_ERR((d)->pclk) ? 0 : clk_enable((d)->pclk)) 71 72 #define amba_pclk_disable(d) \ 73 do { if (!IS_ERR((d)->pclk)) clk_disable((d)->pclk); } while (0) 74 75 #define amba_vcore_enable(d) \ 76 (IS_ERR((d)->vcore) ? 0 : regulator_enable((d)->vcore)) 77 78 #define amba_vcore_disable(d) \ 79 do { if (!IS_ERR((d)->vcore)) regulator_disable((d)->vcore); } while (0) 80 81 /* Some drivers don't use the struct amba_device */ 82 #define AMBA_CONFIG_BITS(a) (((a) >> 24) & 0xff) 83 #define AMBA_REV_BITS(a) (((a) >> 20) & 0x0f) 84 #define AMBA_MANF_BITS(a) (((a) >> 12) & 0xff) 85 #define AMBA_PART_BITS(a) ((a) & 0xfff) 86 87 #define amba_config(d) AMBA_CONFIG_BITS((d)->periphid) 88 #define amba_rev(d) AMBA_REV_BITS((d)->periphid) 89 #define amba_manf(d) AMBA_MANF_BITS((d)->periphid) 90 #define amba_part(d) AMBA_PART_BITS((d)->periphid) 91 92 #endif 93