Initial import

1 files changed, 168 insertions, 0 deletions

diff --git a/include/linux/amba/bus.h b/include/linux/amba/bus.h
new file mode 100644
index 000000000..50fc66868
--- /dev/null
+++ b/include/linux/amba/bus.h
@@ -0,0 +1,168 @@
+/*
+ *  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	9
+#define AMBA_CID	0xb105f00d
+#define CORESIGHT_CID	0xb105900d
+
+struct clk;
+
+struct amba_device {
+	struct device		dev;
+	struct resource		res;
+	struct clk		*pclk;
+	unsigned int		periphid;
+	unsigned int		irq[AMBA_NR_IRQS];
+	char			*driver_override;
+};
+
+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;
+};
+
+/*
+ * Constants for the designer field of the Peripheral ID register. When bit 7
+ * is set to '1', bits [6:0] should be the JEP106 manufacturer identity code.
+ */
+enum amba_vendor {
+	AMBA_VENDOR_ARM = 0x41,
+	AMBA_VENDOR_ST = 0x80,
+	AMBA_VENDOR_QCOM = 0x51,
+	AMBA_VENDOR_LSI = 0xb6,
+};
+
+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);
+struct amba_device *
+amba_apb_device_add_res(struct device *parent, const char *name,
+			resource_size_t base, size_t size, int irq1,
+			int irq2, void *pdata, unsigned int periphid,
+			struct resource *resbase);
+struct amba_device *
+amba_ahb_device_add_res(struct device *parent, const char *name,
+			resource_size_t base, size_t size, int irq1,
+			int irq2, void *pdata, unsigned int periphid,
+			struct resource *resbase);
+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 *);
+
+static inline int amba_pclk_enable(struct amba_device *dev)
+{
+	return clk_enable(dev->pclk);
+}
+
+static inline void amba_pclk_disable(struct amba_device *dev)
+{
+	clk_disable(dev->pclk);
+}
+
+static inline int amba_pclk_prepare(struct amba_device *dev)
+{
+	return clk_prepare(dev->pclk);
+}
+
+static inline void amba_pclk_unprepare(struct amba_device *dev)
+{
+	clk_unprepare(dev->pclk);
+}
+
+/* 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),			\
+	.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