sunxi: video: Add cfb console driver for sunxi

This adds a fixed mode hdmi driver for the sunxi platform. The fixed
mode is a relatively safe 1024x768, more complete EDID handling is
currently not provided. Only HDMI is supported today.

This code is enabled when HPD detects an attached monitor.

Current config is such that 8MB is shaved off at the top of the RAM.
This avoids several memory handling issues, most significant is the fact
that on linux on ARM you are not allowed to remap known RAM as IO. A
clued in display driver will be able to recycle this reserved RAM in
future though.

cfbconsole was chosen as it provides the most important functionality: a
working u-boot console, allowing for the debugging of certain issues
without the need for a UART.

Signed-off-by: Luc Verhaegen <libv@skynet.be>
[hdegoede@redhat.com: Major cleanups and some small bugfixes]
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Anatolij Gustschin <agust@denx.de>
Acked-by: Ian Campbell <ijc@hellion.org.uk>

1 files changed, 185 insertions, 0 deletions

diff --git a/arch/arm/include/asm/arch-sunxi/display.h b/arch/arm/include/asm/arch-sunxi/display.h
new file mode 100644
index 0000000..4a4e9f8
--- /dev/null
+++ b/arch/arm/include/asm/arch-sunxi/display.h
@@ -0,0 +1,185 @@
+/*
+ * Sunxi platform display controller register and constant defines
+ *
+ * (C) Copyright 2014 Hans de Goede <hdegoede@redhat.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef _SUNXI_DISPLAY_H
+#define _SUNXI_DISPLAY_H
+
+struct sunxi_de_be_reg {
+	u8 res0[0x800];			/* 0x000 */
+	u32 mode;			/* 0x800 */
+	u32 backcolor;			/* 0x804 */
+	u32 disp_size;			/* 0x808 */
+	u8 res1[0x4];			/* 0x80c */
+	u32 layer0_size;		/* 0x810 */
+	u32 layer1_size;		/* 0x814 */
+	u32 layer2_size;		/* 0x818 */
+	u32 layer3_size;		/* 0x81c */
+	u32 layer0_pos;			/* 0x820 */
+	u32 layer1_pos;			/* 0x824 */
+	u32 layer2_pos;			/* 0x828 */
+	u32 layer3_pos;			/* 0x82c */
+	u8 res2[0x10];			/* 0x830 */
+	u32 layer0_stride;		/* 0x840 */
+	u32 layer1_stride;		/* 0x844 */
+	u32 layer2_stride;		/* 0x848 */
+	u32 layer3_stride;		/* 0x84c */
+	u32 layer0_addr_low32b;		/* 0x850 */
+	u32 layer1_addr_low32b;		/* 0x854 */
+	u32 layer2_addr_low32b;		/* 0x858 */
+	u32 layer3_addr_low32b;		/* 0x85c */
+	u32 layer0_addr_high4b;		/* 0x860 */
+	u32 layer1_addr_high4b;		/* 0x864 */
+	u32 layer2_addr_high4b;		/* 0x868 */
+	u32 layer3_addr_high4b;		/* 0x86c */
+	u32 reg_ctrl;			/* 0x870 */
+	u8 res3[0xc];			/* 0x874 */
+	u32 color_key_max;		/* 0x880 */
+	u32 color_key_min;		/* 0x884 */
+	u32 color_key_config;		/* 0x888 */
+	u8 res4[0x4];			/* 0x88c */
+	u32 layer0_attr0_ctrl;		/* 0x890 */
+	u32 layer1_attr0_ctrl;		/* 0x894 */
+	u32 layer2_attr0_ctrl;		/* 0x898 */
+	u32 layer3_attr0_ctrl;		/* 0x89c */
+	u32 layer0_attr1_ctrl;		/* 0x8a0 */
+	u32 layer1_attr1_ctrl;		/* 0x8a4 */
+	u32 layer2_attr1_ctrl;		/* 0x8a8 */
+	u32 layer3_attr1_ctrl;		/* 0x8ac */
+};
+
+struct sunxi_lcdc_reg {
+	u32 ctrl;			/* 0x00 */
+	u32 int0;			/* 0x04 */
+	u32 int1;			/* 0x08 */
+	u8 res0[0x04];			/* 0x0c */
+	u32 frame_ctrl;			/* 0x10 */
+	u8 res1[0x2c];			/* 0x14 */
+	u32 tcon0_ctrl;			/* 0x40 */
+	u32 tcon0_dclk;			/* 0x44 */
+	u32 tcon0_basic_timing0;	/* 0x48 */
+	u32 tcon0_basic_timing1;	/* 0x4c */
+	u32 tcon0_basic_timing2;	/* 0x50 */
+	u32 tcon0_basic_timing3;	/* 0x54 */
+	u32 tcon0_hv_intf;		/* 0x58 */
+	u8 res2[0x04];			/* 0x5c */
+	u32 tcon0_cpu_intf;		/* 0x60 */
+	u32 tcon0_cpu_wr_dat;		/* 0x64 */
+	u32 tcon0_cpu_rd_dat0;		/* 0x68 */
+	u32 tcon0_cpu_rd_dat1;		/* 0x6c */
+	u32 tcon0_ttl_timing0;		/* 0x70 */
+	u32 tcon0_ttl_timing1;		/* 0x74 */
+	u32 tcon0_ttl_timing2;		/* 0x78 */
+	u32 tcon0_ttl_timing3;		/* 0x7c */
+	u32 tcon0_ttl_timing4;		/* 0x80 */
+	u32 tcon0_lvds_intf;		/* 0x84 */
+	u32 tcon0_io_polarity;		/* 0x88 */
+	u32 tcon0_io_tristate;		/* 0x8c */
+	u32 tcon1_ctrl;			/* 0x90 */
+	u32 tcon1_timing_source;	/* 0x94 */
+	u32 tcon1_timing_scale;		/* 0x98 */
+	u32 tcon1_timing_out;		/* 0x9c */
+	u32 tcon1_timing_h;		/* 0xa0 */
+	u32 tcon1_timing_v;		/* 0xa4 */
+	u32 tcon1_timing_sync;		/* 0xa8 */
+	u8 res3[0x44];			/* 0xac */
+	u32 tcon1_io_polarity;		/* 0xf0 */
+	u32 tcon1_io_tristate;		/* 0xf4 */
+};
+
+struct sunxi_hdmi_reg {
+	u32 version_id;			/* 0x000 */
+	u32 ctrl;			/* 0x004 */
+	u32 irq;			/* 0x008 */
+	u32 hpd;			/* 0x00c */
+	u32 video_ctrl;			/* 0x010 */
+	u32 video_size;			/* 0x014 */
+	u32 video_bp;			/* 0x018 */
+	u32 video_fp;			/* 0x01c */
+	u32 video_spw;			/* 0x020 */
+	u32 video_polarity;		/* 0x024 */
+	u8 res0[0x1d8];			/* 0x028 */
+	u32 pad_ctrl0;			/* 0x200 */
+	u32 pad_ctrl1;			/* 0x204 */
+	u32 pll_ctrl;			/* 0x208 */
+	u32 pll_dbg0;			/* 0x20c */
+};
+
+/*
+ * DE-BE register constants.
+ */
+#define SUNXI_DE_BE_WIDTH(x)			(((x) - 1) << 0)
+#define SUNXI_DE_BE_HEIGHT(y)			(((y) - 1) << 16)
+#define SUNXI_DE_BE_MODE_ENABLE			(1 << 0)
+#define SUNXI_DE_BE_MODE_START			(1 << 1)
+#define SUNXI_DE_BE_MODE_LAYER0_ENABLE		(1 << 8)
+#define SUNXI_DE_BE_LAYER_STRIDE(x)		((x) << 5)
+#define SUNXI_DE_BE_REG_CTRL_LOAD_REGS		(1 << 0)
+#define SUNXI_DE_BE_LAYER_ATTR1_FMT_XRGB8888	(0x09 << 8)
+
+/*
+ * LCDC register constants.
+ */
+#define SUNXI_LCDC_X(x)				(((x) - 1) << 16)
+#define SUNXI_LCDC_Y(y)				(((y) - 1) << 0)
+#define SUNXI_LCDC_CTRL_IO_MAP_MASK		(1 << 0)
+#define SUNXI_LCDC_CTRL_IO_MAP_TCON0		(0 << 0)
+#define SUNXI_LCDC_CTRL_IO_MAP_TCON1		(1 << 0)
+#define SUNXI_LCDC_CTRL_TCON_ENABLE		(1 << 31)
+#define SUNXI_LCDC_TCON0_DCLK_ENABLE		(0xf << 28)
+#define SUNXI_LCDC_TCON1_CTRL_CLK_DELAY(n)	(((n) & 0x1f) << 4)
+#define SUNXI_LCDC_TCON1_CTRL_ENABLE		(1 << 31)
+#define SUNXI_LCDC_TCON1_TIMING_H_BP(n)		(((n) - 1) << 0)
+#define SUNXI_LCDC_TCON1_TIMING_H_TOTAL(n)	(((n) - 1) << 16)
+#define SUNXI_LCDC_TCON1_TIMING_V_BP(n)		(((n) - 1) << 0)
+#define SUNXI_LCDC_TCON1_TIMING_V_TOTAL(n)	(((n) * 2) << 16)
+
+/*
+ * HDMI register constants.
+ */
+#define SUNXI_HDMI_X(x)				(((x) - 1) << 0)
+#define SUNXI_HDMI_Y(y)				(((y) - 1) << 16)
+#define SUNXI_HDMI_CTRL_ENABLE			(1 << 31)
+#define SUNXI_HDMI_IRQ_STATUS_FIFO_UF		(1 << 0)
+#define SUNXI_HDMI_IRQ_STATUS_FIFO_OF		(1 << 1)
+#define SUNXI_HDMI_IRQ_STATUS_BITS		0x73
+#define SUNXI_HDMI_HPD_DETECT			(1 << 0)
+#define SUNXI_HDMI_VIDEO_CTRL_ENABLE		(1 << 31)
+#define SUNXI_HDMI_VIDEO_POL_HOR		(1 << 0)
+#define SUNXI_HDMI_VIDEO_POL_VER		(1 << 1)
+#define SUNXI_HDMI_VIDEO_POL_TX_CLK		(0x3e0 << 16)
+
+#ifdef CONFIG_MACH_SUN6I
+#define SUNXI_HDMI_PAD_CTRL0_HDP		0x7e80000f
+#define SUNXI_HDMI_PAD_CTRL0_RUN		0x7e8000ff
+#else
+#define SUNXI_HDMI_PAD_CTRL0_HDP		0xfe800000
+#define SUNXI_HDMI_PAD_CTRL0_RUN		0xfe800000
+#endif
+
+#ifdef CONFIG_MACH_SUN4I
+#define SUNXI_HDMI_PAD_CTRL1			0x00d8c820
+#elif defined CONFIG_MACH_SUN6I
+#define SUNXI_HDMI_PAD_CTRL1			0x01ded030
+#else
+#define SUNXI_HDMI_PAD_CTRL1			0x00d8c830
+#endif
+#define SUNXI_HDMI_PAD_CTRL1_HALVE		(1 << 6)
+
+#ifdef CONFIG_MACH_SUN6I
+#define SUNXI_HDMI_PLL_CTRL			0xba48a308
+#define SUNXI_HDMI_PLL_CTRL_DIV(n)		(((n) - 1) << 4)
+#else
+#define SUNXI_HDMI_PLL_CTRL			0xfa4ef708
+#define SUNXI_HDMI_PLL_CTRL_DIV(n)		((n) << 4)
+#endif
+#define SUNXI_HDMI_PLL_CTRL_DIV_MASK		(0xf << 4)
+
+#define SUNXI_HDMI_PLL_DBG0_PLL3		(0 << 21)
+#define SUNXI_HDMI_PLL_DBG0_PLL7		(1 << 21)
+
+#endif /* _SUNXI_DISPLAY_H */