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1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * (C) Copyright 2012 Stephen Warren
4  */
5 
6 #include <common.h>
7 #include <memalign.h>
8 #include <phys2bus.h>
9 #include <asm/arch/mbox.h>
10 
11 struct msg_set_power_state {
12 	struct bcm2835_mbox_hdr hdr;
13 	struct bcm2835_mbox_tag_set_power_state set_power_state;
14 	u32 end_tag;
15 };
16 
17 struct msg_get_clock_rate {
18 	struct bcm2835_mbox_hdr hdr;
19 	struct bcm2835_mbox_tag_get_clock_rate get_clock_rate;
20 	u32 end_tag;
21 };
22 
23 struct msg_query {
24 	struct bcm2835_mbox_hdr hdr;
25 	struct bcm2835_mbox_tag_physical_w_h physical_w_h;
26 	u32 end_tag;
27 };
28 
29 struct msg_setup {
30 	struct bcm2835_mbox_hdr hdr;
31 	struct bcm2835_mbox_tag_physical_w_h physical_w_h;
32 	struct bcm2835_mbox_tag_virtual_w_h virtual_w_h;
33 	struct bcm2835_mbox_tag_depth depth;
34 	struct bcm2835_mbox_tag_pixel_order pixel_order;
35 	struct bcm2835_mbox_tag_alpha_mode alpha_mode;
36 	struct bcm2835_mbox_tag_virtual_offset virtual_offset;
37 	struct bcm2835_mbox_tag_overscan overscan;
38 	struct bcm2835_mbox_tag_allocate_buffer allocate_buffer;
39 	struct bcm2835_mbox_tag_pitch pitch;
40 	u32 end_tag;
41 };
42 
bcm2835_power_on_module(u32 module)43 int bcm2835_power_on_module(u32 module)
44 {
45 	ALLOC_CACHE_ALIGN_BUFFER(struct msg_set_power_state, msg_pwr, 1);
46 	int ret;
47 
48 	BCM2835_MBOX_INIT_HDR(msg_pwr);
49 	BCM2835_MBOX_INIT_TAG(&msg_pwr->set_power_state,
50 			      SET_POWER_STATE);
51 	msg_pwr->set_power_state.body.req.device_id = module;
52 	msg_pwr->set_power_state.body.req.state =
53 		BCM2835_MBOX_SET_POWER_STATE_REQ_ON |
54 		BCM2835_MBOX_SET_POWER_STATE_REQ_WAIT;
55 
56 	ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN,
57 				     &msg_pwr->hdr);
58 	if (ret) {
59 		printf("bcm2835: Could not set module %u power state\n",
60 		       module);
61 		return -EIO;
62 	}
63 
64 	return 0;
65 }
66 
bcm2835_get_mmc_clock(u32 clock_id)67 int bcm2835_get_mmc_clock(u32 clock_id)
68 {
69 	ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_clock_rate, msg_clk, 1);
70 	int ret;
71 
72 	ret = bcm2835_power_on_module(BCM2835_MBOX_POWER_DEVID_SDHCI);
73 	if (ret)
74 		return ret;
75 
76 	BCM2835_MBOX_INIT_HDR(msg_clk);
77 	BCM2835_MBOX_INIT_TAG(&msg_clk->get_clock_rate, GET_CLOCK_RATE);
78 	msg_clk->get_clock_rate.body.req.clock_id = clock_id;
79 
80 	ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg_clk->hdr);
81 	if (ret) {
82 		printf("bcm2835: Could not query eMMC clock rate\n");
83 		return -EIO;
84 	}
85 
86 	return msg_clk->get_clock_rate.body.resp.rate_hz;
87 }
88 
bcm2835_get_video_size(int * widthp,int * heightp)89 int bcm2835_get_video_size(int *widthp, int *heightp)
90 {
91 	ALLOC_CACHE_ALIGN_BUFFER(struct msg_query, msg_query, 1);
92 	int ret;
93 
94 	BCM2835_MBOX_INIT_HDR(msg_query);
95 	BCM2835_MBOX_INIT_TAG_NO_REQ(&msg_query->physical_w_h,
96 				     GET_PHYSICAL_W_H);
97 	ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg_query->hdr);
98 	if (ret) {
99 		printf("bcm2835: Could not query display resolution\n");
100 		return ret;
101 	}
102 	*widthp = msg_query->physical_w_h.body.resp.width;
103 	*heightp = msg_query->physical_w_h.body.resp.height;
104 
105 	return 0;
106 }
107 
bcm2835_set_video_params(int * widthp,int * heightp,int depth_bpp,int pixel_order,int alpha_mode,ulong * fb_basep,ulong * fb_sizep,int * pitchp)108 int bcm2835_set_video_params(int *widthp, int *heightp, int depth_bpp,
109 			     int pixel_order, int alpha_mode, ulong *fb_basep,
110 			     ulong *fb_sizep, int *pitchp)
111 {
112 	ALLOC_CACHE_ALIGN_BUFFER(struct msg_setup, msg_setup, 1);
113 	int ret;
114 
115 	BCM2835_MBOX_INIT_HDR(msg_setup);
116 	BCM2835_MBOX_INIT_TAG(&msg_setup->physical_w_h, SET_PHYSICAL_W_H);
117 	msg_setup->physical_w_h.body.req.width = *widthp;
118 	msg_setup->physical_w_h.body.req.height = *heightp;
119 	BCM2835_MBOX_INIT_TAG(&msg_setup->virtual_w_h, SET_VIRTUAL_W_H);
120 	msg_setup->virtual_w_h.body.req.width = *widthp;
121 	msg_setup->virtual_w_h.body.req.height = *heightp;
122 	BCM2835_MBOX_INIT_TAG(&msg_setup->depth, SET_DEPTH);
123 	msg_setup->depth.body.req.bpp = 32;
124 	BCM2835_MBOX_INIT_TAG(&msg_setup->pixel_order, SET_PIXEL_ORDER);
125 	msg_setup->pixel_order.body.req.order = pixel_order;
126 	BCM2835_MBOX_INIT_TAG(&msg_setup->alpha_mode, SET_ALPHA_MODE);
127 	msg_setup->alpha_mode.body.req.alpha = alpha_mode;
128 	BCM2835_MBOX_INIT_TAG(&msg_setup->virtual_offset, SET_VIRTUAL_OFFSET);
129 	msg_setup->virtual_offset.body.req.x = 0;
130 	msg_setup->virtual_offset.body.req.y = 0;
131 	BCM2835_MBOX_INIT_TAG(&msg_setup->overscan, SET_OVERSCAN);
132 	msg_setup->overscan.body.req.top = 0;
133 	msg_setup->overscan.body.req.bottom = 0;
134 	msg_setup->overscan.body.req.left = 0;
135 	msg_setup->overscan.body.req.right = 0;
136 	BCM2835_MBOX_INIT_TAG(&msg_setup->allocate_buffer, ALLOCATE_BUFFER);
137 	msg_setup->allocate_buffer.body.req.alignment = 0x100;
138 	BCM2835_MBOX_INIT_TAG_NO_REQ(&msg_setup->pitch, GET_PITCH);
139 
140 	ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg_setup->hdr);
141 	if (ret) {
142 		printf("bcm2835: Could not configure display\n");
143 		return ret;
144 	}
145 	*widthp = msg_setup->physical_w_h.body.resp.width;
146 	*heightp = msg_setup->physical_w_h.body.resp.height;
147 	*pitchp = msg_setup->pitch.body.resp.pitch;
148 	*fb_basep = bus_to_phys(
149 			msg_setup->allocate_buffer.body.resp.fb_address);
150 	*fb_sizep = msg_setup->allocate_buffer.body.resp.fb_size;
151 
152 	return 0;
153 }
154