[people/ms/u-boot.git] / arch / arm / include / asm / arch-bcm2835 / mbox.h

/*
 * (C) Copyright 2012 Stephen Warren
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

#ifndef _BCM2835_MBOX_H
#define _BCM2835_MBOX_H

#include <linux/compiler.h>

/*
 * The BCM2835 SoC contains (at least) two CPUs; the VideoCore (a/k/a "GPU")
 * and the ARM CPU. The ARM CPU is often thought of as the main CPU.
 * However, the VideoCore actually controls the initial SoC boot, and hides
 * much of the hardware behind a protocol. This protocol is transported
 * using the SoC's mailbox hardware module.
 *
 * The mailbox hardware supports passing 32-bit values back and forth.
 * Presumably by software convention of the firmware, the bottom 4 bits of the
 * value are used to indicate a logical channel, and the upper 28 bits are the
 * actual payload. Various channels exist using these simple raw messages. See
 * https://github.com/raspberrypi/firmware/wiki/Mailboxes for a list. As an
 * example, the messages on the power management channel are a bitmask of
 * devices whose power should be enabled.
 *
 * The property mailbox channel passes messages that contain the (16-byte
 * aligned) ARM physical address of a memory buffer. This buffer is passed to
 * the VC for processing, is modified in-place by the VC, and the address then
 * passed back to the ARM CPU as the response mailbox message to indicate
 * request completion. The buffers have a generic and extensible format; each
 * buffer contains a standard header, a list of "tags", and a terminating zero
 * entry. Each tag contains an ID indicating its type, and length fields for
 * generic parsing. With some limitations, an arbitrary set of tags may be
 * combined together into a single message buffer. This file defines structs
 * representing the header and many individual tag layouts and IDs.
 */

/* Raw mailbox HW */

#define BCM2835_MBOX_PHYSADDR	0x2000b880

struct bcm2835_mbox_regs {
	u32 read;
	u32 rsvd0[5];
	u32 status;
	u32 config;
	u32 write;
};

#define BCM2835_MBOX_STATUS_WR_FULL	0x80000000
#define BCM2835_MBOX_STATUS_RD_EMPTY	0x40000000

/* Lower 4-bits are channel ID */
#define BCM2835_CHAN_MASK		0xf
#define BCM2835_MBOX_PACK(chan, data)	(((data) & (~BCM2835_CHAN_MASK)) | \
					 (chan & BCM2835_CHAN_MASK))
#define BCM2835_MBOX_UNPACK_CHAN(val)	((val) & BCM2835_CHAN_MASK)
#define BCM2835_MBOX_UNPACK_DATA(val)	((val) & (~BCM2835_CHAN_MASK))

/* Property mailbox buffer structures */

#define BCM2835_MBOX_PROP_CHAN		8

/* All message buffers must start with this header */
struct bcm2835_mbox_hdr {
	u32 buf_size;
	u32 code;
};

#define BCM2835_MBOX_REQ_CODE		0
#define BCM2835_MBOX_RESP_CODE_SUCCESS	0x80000000

#define BCM2835_MBOX_INIT_HDR(_m_) { \
		memset((_m_), 0, sizeof(*(_m_))); \
		(_m_)->hdr.buf_size = sizeof(*(_m_)); \
		(_m_)->hdr.code = 0; \
		(_m_)->end_tag = 0; \
	}

/*
 * A message buffer contains a list of tags. Each tag must also start with
 * a standardized header.
 */
struct bcm2835_mbox_tag_hdr {
	u32 tag;
	u32 val_buf_size;
	u32 val_len;
};

#define BCM2835_MBOX_INIT_TAG(_t_, _id_) { \
		(_t_)->tag_hdr.tag = BCM2835_MBOX_TAG_##_id_; \
		(_t_)->tag_hdr.val_buf_size = sizeof((_t_)->body); \
		(_t_)->tag_hdr.val_len = sizeof((_t_)->body.req); \
	}

#define BCM2835_MBOX_INIT_TAG_NO_REQ(_t_, _id_) { \
		(_t_)->tag_hdr.tag = BCM2835_MBOX_TAG_##_id_; \
		(_t_)->tag_hdr.val_buf_size = sizeof((_t_)->body); \
		(_t_)->tag_hdr.val_len = 0; \
	}

/* When responding, the VC sets this bit in val_len to indicate a response */
#define BCM2835_MBOX_TAG_VAL_LEN_RESPONSE	0x80000000

/*
 * Below we define the ID and struct for many possible tags. This header only
 * defines individual tag structs, not entire message structs, since in
 * general an arbitrary set of tags may be combined into a single message.
 * Clients of the mbox API are expected to define their own overall message
 * structures by combining the header, a set of tags, and a terminating
 * entry. For example,
 *
 * struct msg {
 *     struct bcm2835_mbox_hdr hdr;
 *     struct bcm2835_mbox_tag_get_arm_mem get_arm_mem;
 *     ... perhaps other tags here ...
 *     u32 end_tag;
 * };
 */

#define BCM2835_MBOX_TAG_GET_ARM_MEMORY		0x00010005

struct bcm2835_mbox_tag_get_arm_mem {
	struct bcm2835_mbox_tag_hdr tag_hdr;
	union {
		struct {
		} req;
		struct {
			u32 mem_base;
			u32 mem_size;
		} resp;
	} body;
};

#define BCM2835_MBOX_TAG_GET_CLOCK_RATE	0x00030002

#define BCM2835_MBOX_CLOCK_ID_EMMC	1
#define BCM2835_MBOX_CLOCK_ID_UART	2
#define BCM2835_MBOX_CLOCK_ID_ARM	3
#define BCM2835_MBOX_CLOCK_ID_CORE	4
#define BCM2835_MBOX_CLOCK_ID_V3D	5
#define BCM2835_MBOX_CLOCK_ID_H264	6
#define BCM2835_MBOX_CLOCK_ID_ISP	7
#define BCM2835_MBOX_CLOCK_ID_SDRAM	8
#define BCM2835_MBOX_CLOCK_ID_PIXEL	9
#define BCM2835_MBOX_CLOCK_ID_PWM	10

struct bcm2835_mbox_tag_get_clock_rate {
	struct bcm2835_mbox_tag_hdr tag_hdr;
	union {
		struct {
			u32 clock_id;
		} req;
		struct {
			u32 clock_id;
			u32 rate_hz;
		} resp;
	} body;
};

#define BCM2835_MBOX_TAG_ALLOCATE_BUFFER	0x00040001

struct bcm2835_mbox_tag_allocate_buffer {
	struct bcm2835_mbox_tag_hdr tag_hdr;
	union {
		struct {
			u32 alignment;
		} req;
		struct {
			u32 fb_address;
			u32 fb_size;
		} resp;
	} body;
};

#define BCM2835_MBOX_TAG_RELEASE_BUFFER		0x00048001

struct bcm2835_mbox_tag_release_buffer {
	struct bcm2835_mbox_tag_hdr tag_hdr;
	union {
		struct {
		} req;
		struct {
		} resp;
	} body;
};

#define BCM2835_MBOX_TAG_BLANK_SCREEN		0x00040002

struct bcm2835_mbox_tag_blank_screen {
	struct bcm2835_mbox_tag_hdr tag_hdr;
	union {
		struct {
			/* bit 0 means on, other bots reserved */
			u32 state;
		} req;
		struct {
			u32 state;
		} resp;
	} body;
};

/* Physical means output signal */
#define BCM2835_MBOX_TAG_GET_PHYSICAL_W_H	0x00040003
#define BCM2835_MBOX_TAG_TEST_PHYSICAL_W_H	0x00044003
#define BCM2835_MBOX_TAG_SET_PHYSICAL_W_H	0x00048003

struct bcm2835_mbox_tag_physical_w_h {
	struct bcm2835_mbox_tag_hdr tag_hdr;
	union {
		/* req not used for get */
		struct {
			u32 width;
			u32 height;
		} req;
		struct {
			u32 width;
			u32 height;
		} resp;
	} body;
};

/* Virtual means display buffer */
#define BCM2835_MBOX_TAG_GET_VIRTUAL_W_H	0x00040004
#define BCM2835_MBOX_TAG_TEST_VIRTUAL_W_H	0x00044004
#define BCM2835_MBOX_TAG_SET_VIRTUAL_W_H	0x00048004

struct bcm2835_mbox_tag_virtual_w_h {
	struct bcm2835_mbox_tag_hdr tag_hdr;
	union {
		/* req not used for get */
		struct {
			u32 width;
			u32 height;
		} req;
		struct {
			u32 width;
			u32 height;
		} resp;
	} body;
};

#define BCM2835_MBOX_TAG_GET_DEPTH		0x00040005
#define BCM2835_MBOX_TAG_TEST_DEPTH		0x00044005
#define BCM2835_MBOX_TAG_SET_DEPTH		0x00048005

struct bcm2835_mbox_tag_depth {
	struct bcm2835_mbox_tag_hdr tag_hdr;
	union {
		/* req not used for get */
		struct {
			u32 bpp;
		} req;
		struct {
			u32 bpp;
		} resp;
	} body;
};

#define BCM2835_MBOX_TAG_GET_PIXEL_ORDER	0x00040006
#define BCM2835_MBOX_TAG_TEST_PIXEL_ORDER	0x00044005
#define BCM2835_MBOX_TAG_SET_PIXEL_ORDER	0x00048006

#define BCM2835_MBOX_PIXEL_ORDER_BGR		0
#define BCM2835_MBOX_PIXEL_ORDER_RGB		1

struct bcm2835_mbox_tag_pixel_order {
	struct bcm2835_mbox_tag_hdr tag_hdr;
	union {
		/* req not used for get */
		struct {
			u32 order;
		} req;
		struct {
			u32 order;
		} resp;
	} body;
};

#define BCM2835_MBOX_TAG_GET_ALPHA_MODE		0x00040007
#define BCM2835_MBOX_TAG_TEST_ALPHA_MODE	0x00044007
#define BCM2835_MBOX_TAG_SET_ALPHA_MODE		0x00048007

#define BCM2835_MBOX_ALPHA_MODE_0_OPAQUE	0
#define BCM2835_MBOX_ALPHA_MODE_0_TRANSPARENT	1
#define BCM2835_MBOX_ALPHA_MODE_IGNORED		2

struct bcm2835_mbox_tag_alpha_mode {
	struct bcm2835_mbox_tag_hdr tag_hdr;
	union {
		/* req not used for get */
		struct {
			u32 alpha;
		} req;
		struct {
			u32 alpha;
		} resp;
	} body;
};

#define BCM2835_MBOX_TAG_GET_PITCH		0x00040008

struct bcm2835_mbox_tag_pitch {
	struct bcm2835_mbox_tag_hdr tag_hdr;
	union {
		struct {
		} req;
		struct {
			u32 pitch;
		} resp;
	} body;
};

/* Offset of display window within buffer */
#define BCM2835_MBOX_TAG_GET_VIRTUAL_OFFSET	0x00040009
#define BCM2835_MBOX_TAG_TEST_VIRTUAL_OFFSET	0x00044009
#define BCM2835_MBOX_TAG_SET_VIRTUAL_OFFSET	0x00048009

struct bcm2835_mbox_tag_virtual_offset {
	struct bcm2835_mbox_tag_hdr tag_hdr;
	union {
		/* req not used for get */
		struct {
			u32 x;
			u32 y;
		} req;
		struct {
			u32 x;
			u32 y;
		} resp;
	} body;
};

#define BCM2835_MBOX_TAG_GET_OVERSCAN		0x0004000a
#define BCM2835_MBOX_TAG_TEST_OVERSCAN		0x0004400a
#define BCM2835_MBOX_TAG_SET_OVERSCAN		0x0004800a

struct bcm2835_mbox_tag_overscan {
	struct bcm2835_mbox_tag_hdr tag_hdr;
	union {
		/* req not used for get */
		struct {
			u32 top;
			u32 bottom;
			u32 left;
			u32 right;
		} req;
		struct {
			u32 top;
			u32 bottom;
			u32 left;
			u32 right;
		} resp;
	} body;
};

#define BCM2835_MBOX_TAG_GET_PALETTE		0x0004000b

struct bcm2835_mbox_tag_get_palette {
	struct bcm2835_mbox_tag_hdr tag_hdr;
	union {
		struct {
		} req;
		struct {
			u32 data[1024];
		} resp;
	} body;
};

#define BCM2835_MBOX_TAG_TEST_PALETTE		0x0004400b

struct bcm2835_mbox_tag_test_palette {
	struct bcm2835_mbox_tag_hdr tag_hdr;
	union {
		struct {
			u32 offset;
			u32 num_entries;
			u32 data[256];
		} req;
		struct {
			u32 is_invalid;
		} resp;
	} body;
};

#define BCM2835_MBOX_TAG_SET_PALETTE		0x0004800b

struct bcm2835_mbox_tag_set_palette {
	struct bcm2835_mbox_tag_hdr tag_hdr;
	union {
		struct {
			u32 offset;
			u32 num_entries;
			u32 data[256];
		} req;
		struct {
			u32 is_invalid;
		} resp;
	} body;
};

/*
 * Pass a raw u32 message to the VC, and receive a raw u32 back.
 *
 * Returns 0 for success, any other value for error.
 */
int bcm2835_mbox_call_raw(u32 chan, u32 send, u32 *recv);

/*
 * Pass a complete property-style buffer to the VC, and wait until it has
 * been processed.
 *
 * This function expects a pointer to the mbox_hdr structure in an attempt
 * to ensure some degree of type safety. However, some number of tags and
 * a termination value are expected to immediately follow the header in
 * memory, as required by the property protocol.
 *
 * Returns 0 for success, any other value for error.
 */
int bcm2835_mbox_call_prop(u32 chan, struct bcm2835_mbox_hdr *buffer);

#endif
Commit	Line	Data
88077280 SW	1	/*
	2	* (C) Copyright 2012 Stephen Warren
	3	*
1a459660	4	* SPDX-License-Identifier: GPL-2.0+
88077280 SW	5	*/
	6
	7	#ifndef _BCM2835_MBOX_H
	8	#define _BCM2835_MBOX_H
	9
	10	#include <linux/compiler.h>
	11
	12	/*
	13	* The BCM2835 SoC contains (at least) two CPUs; the VideoCore (a/k/a "GPU")
	14	* and the ARM CPU. The ARM CPU is often thought of as the main CPU.
	15	* However, the VideoCore actually controls the initial SoC boot, and hides
	16	* much of the hardware behind a protocol. This protocol is transported
	17	* using the SoC's mailbox hardware module.
	18	*
	19	* The mailbox hardware supports passing 32-bit values back and forth.
	20	* Presumably by software convention of the firmware, the bottom 4 bits of the
	21	* value are used to indicate a logical channel, and the upper 28 bits are the
	22	* actual payload. Various channels exist using these simple raw messages. See
	23	* https://github.com/raspberrypi/firmware/wiki/Mailboxes for a list. As an
	24	* example, the messages on the power management channel are a bitmask of
	25	* devices whose power should be enabled.
	26	*
	27	* The property mailbox channel passes messages that contain the (16-byte
	28	* aligned) ARM physical address of a memory buffer. This buffer is passed to
	29	* the VC for processing, is modified in-place by the VC, and the address then
	30	* passed back to the ARM CPU as the response mailbox message to indicate
	31	* request completion. The buffers have a generic and extensible format; each
	32	* buffer contains a standard header, a list of "tags", and a terminating zero
	33	* entry. Each tag contains an ID indicating its type, and length fields for
	34	* generic parsing. With some limitations, an arbitrary set of tags may be
	35	* combined together into a single message buffer. This file defines structs
	36	* representing the header and many individual tag layouts and IDs.
	37	*/
	38
	39	/* Raw mailbox HW */
	40
	41	#define BCM2835_MBOX_PHYSADDR 0x2000b880
	42
	43	struct bcm2835_mbox_regs {
	44	u32 read;
	45	u32 rsvd0[5];
	46	u32 status;
	47	u32 config;
	48	u32 write;
	49	};
	50
	51	#define BCM2835_MBOX_STATUS_WR_FULL 0x80000000
	52	#define BCM2835_MBOX_STATUS_RD_EMPTY 0x40000000
	53
	54	/* Lower 4-bits are channel ID */
	55	#define BCM2835_CHAN_MASK 0xf
	56	#define BCM2835_MBOX_PACK(chan, data) (((data) & (~BCM2835_CHAN_MASK)) \| \
	57	(chan & BCM2835_CHAN_MASK))
	58	#define BCM2835_MBOX_UNPACK_CHAN(val) ((val) & BCM2835_CHAN_MASK)
	59	#define BCM2835_MBOX_UNPACK_DATA(val) ((val) & (~BCM2835_CHAN_MASK))
	60
	61	/* Property mailbox buffer structures */
	62
	63	#define BCM2835_MBOX_PROP_CHAN 8
	64
	65	/* All message buffers must start with this header */
	66	struct bcm2835_mbox_hdr {
	67	u32 buf_size;
	68	u32 code;
69	};
70
71	#define BCM2835_MBOX_REQ_CODE 0
72	#define BCM2835_MBOX_RESP_CODE_SUCCESS 0x80000000
73
74	#define BCM2835_MBOX_INIT_HDR(_m_) { \
75	memset((_m_), 0, sizeof(*(_m_))); \
76	(_m_)->hdr.buf_size = sizeof(*(_m_)); \
77	(_m_)->hdr.code = 0; \
78	(_m_)->end_tag = 0; \
79	}
80
81	/*
82	* A message buffer contains a list of tags. Each tag must also start with
83	* a standardized header.
84	*/
85	struct bcm2835_mbox_tag_hdr {
86	u32 tag;
87	u32 val_buf_size;
88	u32 val_len;
89	};
90
91	#define BCM2835_MBOX_INIT_TAG(_t_, _id_) { \
92	(_t_)->tag_hdr.tag = BCM2835_MBOX_TAG_##_id_; \
93	(_t_)->tag_hdr.val_buf_size = sizeof((_t_)->body); \
94	(_t_)->tag_hdr.val_len = sizeof((_t_)->body.req); \
95	}
96
97	#define BCM2835_MBOX_INIT_TAG_NO_REQ(_t_, _id_) { \
98	(_t_)->tag_hdr.tag = BCM2835_MBOX_TAG_##_id_; \
99	(_t_)->tag_hdr.val_buf_size = sizeof((_t_)->body); \
100	(_t_)->tag_hdr.val_len = 0; \
101	}
102
103	/* When responding, the VC sets this bit in val_len to indicate a response */
104	#define BCM2835_MBOX_TAG_VAL_LEN_RESPONSE 0x80000000
105
106	/*
107	* Below we define the ID and struct for many possible tags. This header only
108	* defines individual tag structs, not entire message structs, since in
109	* general an arbitrary set of tags may be combined into a single message.
110	* Clients of the mbox API are expected to define their own overall message
111	* structures by combining the header, a set of tags, and a terminating
112	* entry. For example,
113	*
114	* struct msg {
115	* struct bcm2835_mbox_hdr hdr;
116	* struct bcm2835_mbox_tag_get_arm_mem get_arm_mem;
117	* ... perhaps other tags here ...
118	* u32 end_tag;
119	* };
120	*/
121
122	#define BCM2835_MBOX_TAG_GET_ARM_MEMORY 0x00010005
123
124	struct bcm2835_mbox_tag_get_arm_mem {
125	struct bcm2835_mbox_tag_hdr tag_hdr;
126	union {
127	struct {
128	} req;
129	struct {
130	u32 mem_base;
131	u32 mem_size;
132	} resp;
133	} body;
134	};
135
131a1e60 SW	136	#define BCM2835_MBOX_TAG_GET_CLOCK_RATE 0x00030002
	137
	138	#define BCM2835_MBOX_CLOCK_ID_EMMC 1
	139	#define BCM2835_MBOX_CLOCK_ID_UART 2
	140	#define BCM2835_MBOX_CLOCK_ID_ARM 3
	141	#define BCM2835_MBOX_CLOCK_ID_CORE 4
	142	#define BCM2835_MBOX_CLOCK_ID_V3D 5
	143	#define BCM2835_MBOX_CLOCK_ID_H264 6
	144	#define BCM2835_MBOX_CLOCK_ID_ISP 7
	145	#define BCM2835_MBOX_CLOCK_ID_SDRAM 8
	146	#define BCM2835_MBOX_CLOCK_ID_PIXEL 9
	147	#define BCM2835_MBOX_CLOCK_ID_PWM 10
	148
	149	struct bcm2835_mbox_tag_get_clock_rate {
	150	struct bcm2835_mbox_tag_hdr tag_hdr;
	151	union {
	152	struct {
	153	u32 clock_id;
	154	} req;
	155	struct {
	156	u32 clock_id;
	157	u32 rate_hz;
	158	} resp;
	159	} body;
	160	};
	161
88077280 SW	162	#define BCM2835_MBOX_TAG_ALLOCATE_BUFFER 0x00040001
	163
	164	struct bcm2835_mbox_tag_allocate_buffer {
	165	struct bcm2835_mbox_tag_hdr tag_hdr;
	166	union {
	167	struct {
	168	u32 alignment;
	169	} req;
	170	struct {
	171	u32 fb_address;
	172	u32 fb_size;
	173	} resp;
	174	} body;
	175	};
	176
	177	#define BCM2835_MBOX_TAG_RELEASE_BUFFER 0x00048001
	178
	179	struct bcm2835_mbox_tag_release_buffer {
	180	struct bcm2835_mbox_tag_hdr tag_hdr;
	181	union {
	182	struct {
	183	} req;
	184	struct {
	185	} resp;
	186	} body;
	187	};
	188
	189	#define BCM2835_MBOX_TAG_BLANK_SCREEN 0x00040002
	190
	191	struct bcm2835_mbox_tag_blank_screen {
	192	struct bcm2835_mbox_tag_hdr tag_hdr;
	193	union {
	194	struct {
	195	/* bit 0 means on, other bots reserved */
	196	u32 state;
	197	} req;
	198	struct {
	199	u32 state;
	200	} resp;
	201	} body;
	202	};
	203
	204	/* Physical means output signal */
	205	#define BCM2835_MBOX_TAG_GET_PHYSICAL_W_H 0x00040003
	206	#define BCM2835_MBOX_TAG_TEST_PHYSICAL_W_H 0x00044003
	207	#define BCM2835_MBOX_TAG_SET_PHYSICAL_W_H 0x00048003
	208
	209	struct bcm2835_mbox_tag_physical_w_h {
	210	struct bcm2835_mbox_tag_hdr tag_hdr;
	211	union {
	212	/* req not used for get */
	213	struct {
	214	u32 width;
	215	u32 height;
	216	} req;
	217	struct {
	218	u32 width;
	219	u32 height;
	220	} resp;
	221	} body;
	222	};
	223
	224	/* Virtual means display buffer */
	225	#define BCM2835_MBOX_TAG_GET_VIRTUAL_W_H 0x00040004
226	#define BCM2835_MBOX_TAG_TEST_VIRTUAL_W_H 0x00044004
227	#define BCM2835_MBOX_TAG_SET_VIRTUAL_W_H 0x00048004
228
229	struct bcm2835_mbox_tag_virtual_w_h {
230	struct bcm2835_mbox_tag_hdr tag_hdr;
231	union {
232	/* req not used for get */
233	struct {
234	u32 width;
235	u32 height;
236	} req;
237	struct {
238	u32 width;
239	u32 height;
240	} resp;
241	} body;
242	};
243
244	#define BCM2835_MBOX_TAG_GET_DEPTH 0x00040005
245	#define BCM2835_MBOX_TAG_TEST_DEPTH 0x00044005
246	#define BCM2835_MBOX_TAG_SET_DEPTH 0x00048005
247
248	struct bcm2835_mbox_tag_depth {
249	struct bcm2835_mbox_tag_hdr tag_hdr;
250	union {
251	/* req not used for get */
252	struct {
253	u32 bpp;
254	} req;
255	struct {
256	u32 bpp;
257	} resp;
258	} body;
259	};
260
261	#define BCM2835_MBOX_TAG_GET_PIXEL_ORDER 0x00040006
262	#define BCM2835_MBOX_TAG_TEST_PIXEL_ORDER 0x00044005
263	#define BCM2835_MBOX_TAG_SET_PIXEL_ORDER 0x00048006
264
265	#define BCM2835_MBOX_PIXEL_ORDER_BGR 0
266	#define BCM2835_MBOX_PIXEL_ORDER_RGB 1
267
268	struct bcm2835_mbox_tag_pixel_order {
269	struct bcm2835_mbox_tag_hdr tag_hdr;
270	union {
271	/* req not used for get */
272	struct {
273	u32 order;
274	} req;
275	struct {
276	u32 order;
277	} resp;
278	} body;
279	};
280
281	#define BCM2835_MBOX_TAG_GET_ALPHA_MODE 0x00040007
282	#define BCM2835_MBOX_TAG_TEST_ALPHA_MODE 0x00044007
283	#define BCM2835_MBOX_TAG_SET_ALPHA_MODE 0x00048007
284
285	#define BCM2835_MBOX_ALPHA_MODE_0_OPAQUE 0
286	#define BCM2835_MBOX_ALPHA_MODE_0_TRANSPARENT 1
287	#define BCM2835_MBOX_ALPHA_MODE_IGNORED 2
288
289	struct bcm2835_mbox_tag_alpha_mode {
290	struct bcm2835_mbox_tag_hdr tag_hdr;
291	union {
292	/* req not used for get */
293	struct {
294	u32 alpha;
295	} req;
296	struct {
297	u32 alpha;
298	} resp;
299	} body;
300	};
301
302	#define BCM2835_MBOX_TAG_GET_PITCH 0x00040008
303
304	struct bcm2835_mbox_tag_pitch {
305	struct bcm2835_mbox_tag_hdr tag_hdr;
306	union {
307	struct {
308	} req;
309	struct {
310	u32 pitch;
311	} resp;
312	} body;
313	};
314
315	/* Offset of display window within buffer */
316	#define BCM2835_MBOX_TAG_GET_VIRTUAL_OFFSET 0x00040009
317	#define BCM2835_MBOX_TAG_TEST_VIRTUAL_OFFSET 0x00044009
318	#define BCM2835_MBOX_TAG_SET_VIRTUAL_OFFSET 0x00048009
319
320	struct bcm2835_mbox_tag_virtual_offset {
321	struct bcm2835_mbox_tag_hdr tag_hdr;
322	union {
323	/* req not used for get */
324	struct {
325	u32 x;
326	u32 y;
327	} req;
328	struct {
329	u32 x;
330	u32 y;
331	} resp;
332	} body;
333	};
334
335	#define BCM2835_MBOX_TAG_GET_OVERSCAN 0x0004000a
336	#define BCM2835_MBOX_TAG_TEST_OVERSCAN 0x0004400a
337	#define BCM2835_MBOX_TAG_SET_OVERSCAN 0x0004800a
338
339	struct bcm2835_mbox_tag_overscan {
340	struct bcm2835_mbox_tag_hdr tag_hdr;
341	union {
342	/* req not used for get */
343	struct {
344	u32 top;
345	u32 bottom;
346	u32 left;
347	u32 right;
348	} req;
349	struct {
350	u32 top;
351	u32 bottom;
352	u32 left;
e2788afe	353	u32 right;
88077280 SW	354	} resp;
	355	} body;
	356	};
	357
	358	#define BCM2835_MBOX_TAG_GET_PALETTE 0x0004000b
	359
	360	struct bcm2835_mbox_tag_get_palette {
	361	struct bcm2835_mbox_tag_hdr tag_hdr;
	362	union {
	363	struct {
	364	} req;
	365	struct {
	366	u32 data[1024];
	367	} resp;
	368	} body;
	369	};
	370
	371	#define BCM2835_MBOX_TAG_TEST_PALETTE 0x0004400b
	372
	373	struct bcm2835_mbox_tag_test_palette {
	374	struct bcm2835_mbox_tag_hdr tag_hdr;
	375	union {
	376	struct {
	377	u32 offset;
	378	u32 num_entries;
	379	u32 data[256];
	380	} req;
	381	struct {
	382	u32 is_invalid;
	383	} resp;
	384	} body;
	385	};
	386
	387	#define BCM2835_MBOX_TAG_SET_PALETTE 0x0004800b
	388
	389	struct bcm2835_mbox_tag_set_palette {
	390	struct bcm2835_mbox_tag_hdr tag_hdr;
	391	union {
	392	struct {
	393	u32 offset;
	394	u32 num_entries;
	395	u32 data[256];
	396	} req;
	397	struct {
	398	u32 is_invalid;
	399	} resp;
	400	} body;
	401	};
	402
	403	/*
	404	* Pass a raw u32 message to the VC, and receive a raw u32 back.
	405	*
	406	* Returns 0 for success, any other value for error.
	407	*/
	408	int bcm2835_mbox_call_raw(u32 chan, u32 send, u32 *recv);
	409
	410	/*
	411	* Pass a complete property-style buffer to the VC, and wait until it has
	412	* been processed.
	413	*
	414	* This function expects a pointer to the mbox_hdr structure in an attempt
	415	* to ensure some degree of type safety. However, some number of tags and
	416	* a termination value are expected to immediately follow the header in
	417	* memory, as required by the property protocol.
418	*
419	* Returns 0 for success, any other value for error.
420	*/
421	int bcm2835_mbox_call_prop(u32 chan, struct bcm2835_mbox_hdr *buffer);
422
423	#endif