[J-u-boot.git] / drivers / video / bcm2835.c

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

#include <common.h>
#include <lcd.h>
#include <memalign.h>
#include <phys2bus.h>
#include <asm/arch/mbox.h>
#include <asm/global_data.h>

DECLARE_GLOBAL_DATA_PTR;

/* Global variables that lcd.c expects to exist */
vidinfo_t panel_info;

static u32 bcm2835_pitch;

struct msg_query {
	struct bcm2835_mbox_hdr hdr;
	struct bcm2835_mbox_tag_physical_w_h physical_w_h;
	u32 end_tag;
};

struct msg_setup {
	struct bcm2835_mbox_hdr hdr;
	struct bcm2835_mbox_tag_physical_w_h physical_w_h;
	struct bcm2835_mbox_tag_virtual_w_h virtual_w_h;
	struct bcm2835_mbox_tag_depth depth;
	struct bcm2835_mbox_tag_pixel_order pixel_order;
	struct bcm2835_mbox_tag_alpha_mode alpha_mode;
	struct bcm2835_mbox_tag_virtual_offset virtual_offset;
	struct bcm2835_mbox_tag_overscan overscan;
	struct bcm2835_mbox_tag_allocate_buffer allocate_buffer;
	struct bcm2835_mbox_tag_pitch pitch;
	u32 end_tag;
};

void lcd_ctrl_init(void *lcdbase)
{
	ALLOC_CACHE_ALIGN_BUFFER(struct msg_query, msg_query, 1);
	ALLOC_CACHE_ALIGN_BUFFER(struct msg_setup, msg_setup, 1);
	int ret;
	u32 w, h;
	u32 fb_start, fb_end;

	debug("bcm2835: Query resolution...\n");

	BCM2835_MBOX_INIT_HDR(msg_query);
	BCM2835_MBOX_INIT_TAG_NO_REQ(&msg_query->physical_w_h,
					GET_PHYSICAL_W_H);
	ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg_query->hdr);
	if (ret) {
		printf("bcm2835: Could not query display resolution\n");
		/* FIXME: How to disable the LCD to prevent errors? hang()? */
		return;
	}

	w = msg_query->physical_w_h.body.resp.width;
	h = msg_query->physical_w_h.body.resp.height;

	debug("bcm2835: Setting up display for %d x %d\n", w, h);

	BCM2835_MBOX_INIT_HDR(msg_setup);
	BCM2835_MBOX_INIT_TAG(&msg_setup->physical_w_h, SET_PHYSICAL_W_H);
	msg_setup->physical_w_h.body.req.width = w;
	msg_setup->physical_w_h.body.req.height = h;
	BCM2835_MBOX_INIT_TAG(&msg_setup->virtual_w_h, SET_VIRTUAL_W_H);
	msg_setup->virtual_w_h.body.req.width = w;
	msg_setup->virtual_w_h.body.req.height = h;
	BCM2835_MBOX_INIT_TAG(&msg_setup->depth, SET_DEPTH);
	msg_setup->depth.body.req.bpp = 32;
	BCM2835_MBOX_INIT_TAG(&msg_setup->pixel_order, SET_PIXEL_ORDER);
	msg_setup->pixel_order.body.req.order = BCM2835_MBOX_PIXEL_ORDER_RGB;
	BCM2835_MBOX_INIT_TAG(&msg_setup->alpha_mode, SET_ALPHA_MODE);
	msg_setup->alpha_mode.body.req.alpha = BCM2835_MBOX_ALPHA_MODE_IGNORED;
	BCM2835_MBOX_INIT_TAG(&msg_setup->virtual_offset, SET_VIRTUAL_OFFSET);
	msg_setup->virtual_offset.body.req.x = 0;
	msg_setup->virtual_offset.body.req.y = 0;
	BCM2835_MBOX_INIT_TAG(&msg_setup->overscan, SET_OVERSCAN);
	msg_setup->overscan.body.req.top = 0;
	msg_setup->overscan.body.req.bottom = 0;
	msg_setup->overscan.body.req.left = 0;
	msg_setup->overscan.body.req.right = 0;
	BCM2835_MBOX_INIT_TAG(&msg_setup->allocate_buffer, ALLOCATE_BUFFER);
	msg_setup->allocate_buffer.body.req.alignment = 0x100;
	BCM2835_MBOX_INIT_TAG_NO_REQ(&msg_setup->pitch, GET_PITCH);

	ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg_setup->hdr);
	if (ret) {
		printf("bcm2835: Could not configure display\n");
		/* FIXME: How to disable the LCD to prevent errors? hang()? */
		return;
	}

	w = msg_setup->physical_w_h.body.resp.width;
	h = msg_setup->physical_w_h.body.resp.height;
	bcm2835_pitch = msg_setup->pitch.body.resp.pitch;

	debug("bcm2835: Final resolution is %d x %d\n", w, h);

	panel_info.vl_col = w;
	panel_info.vl_row = h;
	panel_info.vl_bpix = LCD_COLOR32;

	gd->fb_base = bus_to_phys(
		msg_setup->allocate_buffer.body.resp.fb_address);

	/* Enable dcache for the frame buffer */
	fb_start = gd->fb_base & ~(MMU_SECTION_SIZE - 1);
	fb_end = gd->fb_base + msg_setup->allocate_buffer.body.resp.fb_size;
	fb_end = ALIGN(fb_end, 1 << MMU_SECTION_SHIFT);
	mmu_set_region_dcache_behaviour(fb_start, fb_end - fb_start,
		DCACHE_WRITEBACK);
	lcd_set_flush_dcache(1);
}

void lcd_enable(void)
{
}

int lcd_get_size(int *line_length)
{
	*line_length = bcm2835_pitch;
	return *line_length * panel_info.vl_row;
}
Commit	Line	Data
6be3c9fc SW	1	/*
	2	* (C) Copyright 2012 Stephen Warren
	3	*
1a459660	4	* SPDX-License-Identifier: GPL-2.0+
6be3c9fc SW	5	*/
	6
	7	#include <common.h>
	8	#include <lcd.h>
cf92e05c	9	#include <memalign.h>
1382648b	10	#include <phys2bus.h>
6be3c9fc SW	11	#include <asm/arch/mbox.h>
	12	#include <asm/global_data.h>
	13
	14	DECLARE_GLOBAL_DATA_PTR;
	15
	16	/* Global variables that lcd.c expects to exist */
6be3c9fc	17	vidinfo_t panel_info;
6be3c9fc	18
44376eff AH	19	static u32 bcm2835_pitch;
44376eff AH	20
6be3c9fc SW	21	struct msg_query {
	22	struct bcm2835_mbox_hdr hdr;
	23	struct bcm2835_mbox_tag_physical_w_h physical_w_h;
	24	u32 end_tag;
	25	};
	26
	27	struct msg_setup {
	28	struct bcm2835_mbox_hdr hdr;
	29	struct bcm2835_mbox_tag_physical_w_h physical_w_h;
	30	struct bcm2835_mbox_tag_virtual_w_h virtual_w_h;
	31	struct bcm2835_mbox_tag_depth depth;
	32	struct bcm2835_mbox_tag_pixel_order pixel_order;
	33	struct bcm2835_mbox_tag_alpha_mode alpha_mode;
	34	struct bcm2835_mbox_tag_virtual_offset virtual_offset;
	35	struct bcm2835_mbox_tag_overscan overscan;
	36	struct bcm2835_mbox_tag_allocate_buffer allocate_buffer;
44376eff	37	struct bcm2835_mbox_tag_pitch pitch;
6be3c9fc SW	38	u32 end_tag;
	39	};
	40
	41	void lcd_ctrl_init(void *lcdbase)
	42	{
927753ae AS	43	ALLOC_CACHE_ALIGN_BUFFER(struct msg_query, msg_query, 1);
927753ae AS	44	ALLOC_CACHE_ALIGN_BUFFER(struct msg_setup, msg_setup, 1);
6be3c9fc SW	45	int ret;
6be3c9fc SW	46	u32 w, h;
99de254e	47	u32 fb_start, fb_end;
6be3c9fc SW	48
	49	debug("bcm2835: Query resolution...\n");
	50
	51	BCM2835_MBOX_INIT_HDR(msg_query);
	52	BCM2835_MBOX_INIT_TAG_NO_REQ(&msg_query->physical_w_h,
	53	GET_PHYSICAL_W_H);
	54	ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg_query->hdr);
	55	if (ret) {
	56	printf("bcm2835: Could not query display resolution\n");
	57	/* FIXME: How to disable the LCD to prevent errors? hang()? */
	58	return;
	59	}
	60
	61	w = msg_query->physical_w_h.body.resp.width;
	62	h = msg_query->physical_w_h.body.resp.height;
	63
	64	debug("bcm2835: Setting up display for %d x %d\n", w, h);
	65
	66	BCM2835_MBOX_INIT_HDR(msg_setup);
	67	BCM2835_MBOX_INIT_TAG(&msg_setup->physical_w_h, SET_PHYSICAL_W_H);
	68	msg_setup->physical_w_h.body.req.width = w;
	69	msg_setup->physical_w_h.body.req.height = h;
	70	BCM2835_MBOX_INIT_TAG(&msg_setup->virtual_w_h, SET_VIRTUAL_W_H);
	71	msg_setup->virtual_w_h.body.req.width = w;
	72	msg_setup->virtual_w_h.body.req.height = h;
	73	BCM2835_MBOX_INIT_TAG(&msg_setup->depth, SET_DEPTH);
8b82dd9a	74	msg_setup->depth.body.req.bpp = 32;
6be3c9fc	75	BCM2835_MBOX_INIT_TAG(&msg_setup->pixel_order, SET_PIXEL_ORDER);
8b82dd9a	76	msg_setup->pixel_order.body.req.order = BCM2835_MBOX_PIXEL_ORDER_RGB;
6be3c9fc SW	77	BCM2835_MBOX_INIT_TAG(&msg_setup->alpha_mode, SET_ALPHA_MODE);
	78	msg_setup->alpha_mode.body.req.alpha = BCM2835_MBOX_ALPHA_MODE_IGNORED;
	79	BCM2835_MBOX_INIT_TAG(&msg_setup->virtual_offset, SET_VIRTUAL_OFFSET);
	80	msg_setup->virtual_offset.body.req.x = 0;
	81	msg_setup->virtual_offset.body.req.y = 0;
	82	BCM2835_MBOX_INIT_TAG(&msg_setup->overscan, SET_OVERSCAN);
	83	msg_setup->overscan.body.req.top = 0;
	84	msg_setup->overscan.body.req.bottom = 0;
	85	msg_setup->overscan.body.req.left = 0;
	86	msg_setup->overscan.body.req.right = 0;
	87	BCM2835_MBOX_INIT_TAG(&msg_setup->allocate_buffer, ALLOCATE_BUFFER);
	88	msg_setup->allocate_buffer.body.req.alignment = 0x100;
44376eff	89	BCM2835_MBOX_INIT_TAG_NO_REQ(&msg_setup->pitch, GET_PITCH);
6be3c9fc SW	90
	91	ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg_setup->hdr);
	92	if (ret) {
	93	printf("bcm2835: Could not configure display\n");
	94	/* FIXME: How to disable the LCD to prevent errors? hang()? */
	95	return;
	96	}
	97
	98	w = msg_setup->physical_w_h.body.resp.width;
	99	h = msg_setup->physical_w_h.body.resp.height;
44376eff	100	bcm2835_pitch = msg_setup->pitch.body.resp.pitch;
6be3c9fc SW	101
	102	debug("bcm2835: Final resolution is %d x %d\n", w, h);
	103
	104	panel_info.vl_col = w;
	105	panel_info.vl_row = h;
8b82dd9a	106	panel_info.vl_bpix = LCD_COLOR32;
6be3c9fc	107
1382648b SW	108	gd->fb_base = bus_to_phys(
1382648b SW	109	msg_setup->allocate_buffer.body.resp.fb_address);
99de254e AG	110
	111	/* Enable dcache for the frame buffer */
	112	fb_start = gd->fb_base & ~(MMU_SECTION_SIZE - 1);
	113	fb_end = gd->fb_base + msg_setup->allocate_buffer.body.resp.fb_size;
	114	fb_end = ALIGN(fb_end, 1 << MMU_SECTION_SHIFT);
	115	mmu_set_region_dcache_behaviour(fb_start, fb_end - fb_start,
	116	DCACHE_WRITEBACK);
	117	lcd_set_flush_dcache(1);
6be3c9fc SW	118	}
	119
	120	void lcd_enable(void)
	121	{
	122	}
44376eff AH	123
	124	int lcd_get_size(int *line_length)
	125	{
	126	*line_length = bcm2835_pitch;
	127	return line_length panel_info.vl_row;
	128	}