2 * (C) Copyright 2012 Stephen Warren
4 * See file CREDITS for list of people who contributed to this
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License as
9 * published by the Free Software Foundation; either version 2 of
10 * the License, or (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
20 #include <asm/arch/mbox.h>
21 #include <asm/global_data.h>
23 DECLARE_GLOBAL_DATA_PTR
;
25 /* Global variables that lcd.c expects to exist */
30 void *lcd_console_address
;
34 char lcd_cursor_enabled
;
35 ushort lcd_cursor_width
;
36 ushort lcd_cursor_height
;
39 struct bcm2835_mbox_hdr hdr
;
40 struct bcm2835_mbox_tag_physical_w_h physical_w_h
;
45 struct bcm2835_mbox_hdr hdr
;
46 struct bcm2835_mbox_tag_physical_w_h physical_w_h
;
47 struct bcm2835_mbox_tag_virtual_w_h virtual_w_h
;
48 struct bcm2835_mbox_tag_depth depth
;
49 struct bcm2835_mbox_tag_pixel_order pixel_order
;
50 struct bcm2835_mbox_tag_alpha_mode alpha_mode
;
51 struct bcm2835_mbox_tag_virtual_offset virtual_offset
;
52 struct bcm2835_mbox_tag_overscan overscan
;
53 struct bcm2835_mbox_tag_allocate_buffer allocate_buffer
;
57 void lcd_ctrl_init(void *lcdbase
)
59 ALLOC_ALIGN_BUFFER(struct msg_query
, msg_query
, 1, 16);
60 ALLOC_ALIGN_BUFFER(struct msg_setup
, msg_setup
, 1, 16);
64 debug("bcm2835: Query resolution...\n");
66 BCM2835_MBOX_INIT_HDR(msg_query
);
67 BCM2835_MBOX_INIT_TAG_NO_REQ(&msg_query
->physical_w_h
,
69 ret
= bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN
, &msg_query
->hdr
);
71 printf("bcm2835: Could not query display resolution\n");
72 /* FIXME: How to disable the LCD to prevent errors? hang()? */
76 w
= msg_query
->physical_w_h
.body
.resp
.width
;
77 h
= msg_query
->physical_w_h
.body
.resp
.height
;
79 debug("bcm2835: Setting up display for %d x %d\n", w
, h
);
81 BCM2835_MBOX_INIT_HDR(msg_setup
);
82 BCM2835_MBOX_INIT_TAG(&msg_setup
->physical_w_h
, SET_PHYSICAL_W_H
);
83 msg_setup
->physical_w_h
.body
.req
.width
= w
;
84 msg_setup
->physical_w_h
.body
.req
.height
= h
;
85 BCM2835_MBOX_INIT_TAG(&msg_setup
->virtual_w_h
, SET_VIRTUAL_W_H
);
86 msg_setup
->virtual_w_h
.body
.req
.width
= w
;
87 msg_setup
->virtual_w_h
.body
.req
.height
= h
;
88 BCM2835_MBOX_INIT_TAG(&msg_setup
->depth
, SET_DEPTH
);
89 msg_setup
->depth
.body
.req
.bpp
= 16;
90 BCM2835_MBOX_INIT_TAG(&msg_setup
->pixel_order
, SET_PIXEL_ORDER
);
91 msg_setup
->pixel_order
.body
.req
.order
= BCM2835_MBOX_PIXEL_ORDER_BGR
;
92 BCM2835_MBOX_INIT_TAG(&msg_setup
->alpha_mode
, SET_ALPHA_MODE
);
93 msg_setup
->alpha_mode
.body
.req
.alpha
= BCM2835_MBOX_ALPHA_MODE_IGNORED
;
94 BCM2835_MBOX_INIT_TAG(&msg_setup
->virtual_offset
, SET_VIRTUAL_OFFSET
);
95 msg_setup
->virtual_offset
.body
.req
.x
= 0;
96 msg_setup
->virtual_offset
.body
.req
.y
= 0;
97 BCM2835_MBOX_INIT_TAG(&msg_setup
->overscan
, SET_OVERSCAN
);
98 msg_setup
->overscan
.body
.req
.top
= 0;
99 msg_setup
->overscan
.body
.req
.bottom
= 0;
100 msg_setup
->overscan
.body
.req
.left
= 0;
101 msg_setup
->overscan
.body
.req
.right
= 0;
102 BCM2835_MBOX_INIT_TAG(&msg_setup
->allocate_buffer
, ALLOCATE_BUFFER
);
103 msg_setup
->allocate_buffer
.body
.req
.alignment
= 0x100;
105 ret
= bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN
, &msg_setup
->hdr
);
107 printf("bcm2835: Could not configure display\n");
108 /* FIXME: How to disable the LCD to prevent errors? hang()? */
112 w
= msg_setup
->physical_w_h
.body
.resp
.width
;
113 h
= msg_setup
->physical_w_h
.body
.resp
.height
;
115 debug("bcm2835: Final resolution is %d x %d\n", w
, h
);
117 panel_info
.vl_col
= w
;
118 panel_info
.vl_row
= h
;
119 panel_info
.vl_bpix
= LCD_COLOR16
;
121 gd
->fb_base
= msg_setup
->allocate_buffer
.body
.resp
.fb_address
;
122 lcd_base
= (void *)gd
->fb_base
;
125 void lcd_enable(void)