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Merge branch 'u-boot/master' into 'u-boot-arm/master'
[karo-tx-uboot.git] / drivers / video / bcm2835.c
1 /*
2  * (C) Copyright 2012 Stephen Warren
3  *
4  * See file CREDITS for list of people who contributed to this
5  * project.
6  *
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.
11  *
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.
16  */
17
18 #include <common.h>
19 #include <lcd.h>
20 #include <asm/arch/mbox.h>
21 #include <asm/global_data.h>
22
23 DECLARE_GLOBAL_DATA_PTR;
24
25 /* Global variables that lcd.c expects to exist */
26 vidinfo_t panel_info;
27
28 struct msg_query {
29         struct bcm2835_mbox_hdr hdr;
30         struct bcm2835_mbox_tag_physical_w_h physical_w_h;
31         u32 end_tag;
32 };
33
34 struct msg_setup {
35         struct bcm2835_mbox_hdr hdr;
36         struct bcm2835_mbox_tag_physical_w_h physical_w_h;
37         struct bcm2835_mbox_tag_virtual_w_h virtual_w_h;
38         struct bcm2835_mbox_tag_depth depth;
39         struct bcm2835_mbox_tag_pixel_order pixel_order;
40         struct bcm2835_mbox_tag_alpha_mode alpha_mode;
41         struct bcm2835_mbox_tag_virtual_offset virtual_offset;
42         struct bcm2835_mbox_tag_overscan overscan;
43         struct bcm2835_mbox_tag_allocate_buffer allocate_buffer;
44         u32 end_tag;
45 };
46
47 void lcd_ctrl_init(void *lcdbase)
48 {
49         ALLOC_ALIGN_BUFFER(struct msg_query, msg_query, 1, 16);
50         ALLOC_ALIGN_BUFFER(struct msg_setup, msg_setup, 1, 16);
51         int ret;
52         u32 w, h;
53
54         debug("bcm2835: Query resolution...\n");
55
56         BCM2835_MBOX_INIT_HDR(msg_query);
57         BCM2835_MBOX_INIT_TAG_NO_REQ(&msg_query->physical_w_h,
58                                         GET_PHYSICAL_W_H);
59         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg_query->hdr);
60         if (ret) {
61                 printf("bcm2835: Could not query display resolution\n");
62                 /* FIXME: How to disable the LCD to prevent errors? hang()? */
63                 return;
64         }
65
66         w = msg_query->physical_w_h.body.resp.width;
67         h = msg_query->physical_w_h.body.resp.height;
68
69         debug("bcm2835: Setting up display for %d x %d\n", w, h);
70
71         BCM2835_MBOX_INIT_HDR(msg_setup);
72         BCM2835_MBOX_INIT_TAG(&msg_setup->physical_w_h, SET_PHYSICAL_W_H);
73         msg_setup->physical_w_h.body.req.width = w;
74         msg_setup->physical_w_h.body.req.height = h;
75         BCM2835_MBOX_INIT_TAG(&msg_setup->virtual_w_h, SET_VIRTUAL_W_H);
76         msg_setup->virtual_w_h.body.req.width = w;
77         msg_setup->virtual_w_h.body.req.height = h;
78         BCM2835_MBOX_INIT_TAG(&msg_setup->depth, SET_DEPTH);
79         msg_setup->depth.body.req.bpp = 16;
80         BCM2835_MBOX_INIT_TAG(&msg_setup->pixel_order, SET_PIXEL_ORDER);
81         msg_setup->pixel_order.body.req.order = BCM2835_MBOX_PIXEL_ORDER_BGR;
82         BCM2835_MBOX_INIT_TAG(&msg_setup->alpha_mode, SET_ALPHA_MODE);
83         msg_setup->alpha_mode.body.req.alpha = BCM2835_MBOX_ALPHA_MODE_IGNORED;
84         BCM2835_MBOX_INIT_TAG(&msg_setup->virtual_offset, SET_VIRTUAL_OFFSET);
85         msg_setup->virtual_offset.body.req.x = 0;
86         msg_setup->virtual_offset.body.req.y = 0;
87         BCM2835_MBOX_INIT_TAG(&msg_setup->overscan, SET_OVERSCAN);
88         msg_setup->overscan.body.req.top = 0;
89         msg_setup->overscan.body.req.bottom = 0;
90         msg_setup->overscan.body.req.left = 0;
91         msg_setup->overscan.body.req.right = 0;
92         BCM2835_MBOX_INIT_TAG(&msg_setup->allocate_buffer, ALLOCATE_BUFFER);
93         msg_setup->allocate_buffer.body.req.alignment = 0x100;
94
95         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg_setup->hdr);
96         if (ret) {
97                 printf("bcm2835: Could not configure display\n");
98                 /* FIXME: How to disable the LCD to prevent errors? hang()? */
99                 return;
100         }
101
102         w = msg_setup->physical_w_h.body.resp.width;
103         h = msg_setup->physical_w_h.body.resp.height;
104
105         debug("bcm2835: Final resolution is %d x %d\n", w, h);
106
107         panel_info.vl_col = w;
108         panel_info.vl_row = h;
109         panel_info.vl_bpix = LCD_COLOR16;
110
111         gd->fb_base = msg_setup->allocate_buffer.body.resp.fb_address;
112 }
113
114 void lcd_enable(void)
115 {
116 }