video: tegra: Rename tegra2.c to tegra.c

Enables common LCD support for Tegra2 and Tegra3

BUG=chromium-os:23496
TEST=Built ok for Cardhu, Waluigi and Seaboard.

Change-Id: I39af6a01956a3f1545e7cccfa9c23a3f81d3dc0c
Signed-off-by: Puneet Saxena <puneets@nvidia.com>
Reviewed-on: https://gerrit.chromium.org/gerrit/14693

1 files changed, 351 insertions, 0 deletions

diff --git a/drivers/video/tegra.c b/drivers/video/tegra.c
new file mode 100644
index 0000000000..2bdb392a7a
--- /dev/null
+++ b/drivers/video/tegra.c
@@ -0,0 +1,351 @@
+/*
+ * Copyright (c) 2011 The Chromium OS Authors.
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <lcd.h>
+#include <fdt_decode.h>
+#include <asm/clocks.h>
+#include <asm/arch/clock.h>
+#include <asm/arch/gpio.h>
+#include <asm/arch/pinmux.h>
+#include <asm/arch-tegra/power.h>
+#include <asm/arch-tegra/pwfm.h>
+#include <asm/arch-tegra/display.h>
+#include <asm/system.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+/* These are the stages we go throuh in enabling the LCD */
+enum stage_t {
+	STAGE_START,
+	STAGE_LVDS,
+	STAGE_BACKLIGHT_VDD,
+	STAGE_PWFM,
+	STAGE_BACKLIGHT_EN,
+	STAGE_DONE,
+};
+
+static enum stage_t stage;	/* Current stage we are at */
+static unsigned long timer_next; /* Time we can move onto next stage */
+static struct fdt_lcd config;	/* Our LCD config, set up in handle_stage() */
+
+enum {
+	/* Maximum LCD size we support */
+	LCD_MAX_WIDTH		= 1366,
+	LCD_MAX_HEIGHT		= 768,
+	LCD_MAX_LOG2_BPP	= 4,		/* 16 bpp */
+};
+
+int lcd_line_length;
+int lcd_color_fg;
+int lcd_color_bg;
+
+void *lcd_base;			/* Start of framebuffer memory	*/
+void *lcd_console_address;	/* Start of console buffer	*/
+
+short console_col;
+short console_row;
+
+vidinfo_t panel_info = {
+	/* Insert a value here so that we don't end up in the BSS */
+	.vl_col = -1,
+};
+
+char lcd_cursor_enabled;	/* set initial value to false */
+
+ushort lcd_cursor_width;
+ushort lcd_cursor_height;
+
+
+static void clk_init(void)
+{
+	/* TODO: Put this into the FDT when we have clock support there */
+	clock_start_periph_pll(PERIPH_ID_3D, CLOCK_ID_MEMORY, CLK_300M);
+	clock_start_periph_pll(PERIPH_ID_2D, CLOCK_ID_MEMORY, CLK_300M);
+	clock_start_periph_pll(PERIPH_ID_HOST1X, CLOCK_ID_PERIPH, CLK_144M);
+	clock_start_periph_pll(PERIPH_ID_DISP1, CLOCK_ID_CGENERAL, CLK_600M);
+	clock_start_periph_pll(PERIPH_ID_PWM, CLOCK_ID_SFROM32KHZ, CLK_32768);
+}
+
+/*
+ * The PINMUX macro is used per board to setup the pinmux configuration.
+ */
+#define PINMUX(grp, mux, pupd, tri)                   \
+	{PINGRP_##grp, PMUX_FUNC_##mux, PMUX_PULL_##pupd, PMUX_TRI_##tri}
+
+struct pingroup_config pinmux_cros_1[] = {
+	PINMUX(GPU,   PWM,        NORMAL,    NORMAL),
+	PINMUX(LD0,   DISPA,      NORMAL,    NORMAL),
+	PINMUX(LD1,   DISPA,      NORMAL,    NORMAL),
+	PINMUX(LD10,  DISPA,      NORMAL,    NORMAL),
+	PINMUX(LD11,  DISPA,      NORMAL,    NORMAL),
+	PINMUX(LD12,  DISPA,      NORMAL,    NORMAL),
+	PINMUX(LD13,  DISPA,      NORMAL,    NORMAL),
+	PINMUX(LD14,  DISPA,      NORMAL,    NORMAL),
+	PINMUX(LD15,  DISPA,      NORMAL,    NORMAL),
+	PINMUX(LD16,  DISPA,      NORMAL,    NORMAL),
+	PINMUX(LD17,  DISPA,      NORMAL,    NORMAL),
+	PINMUX(LD2,   DISPA,      NORMAL,    NORMAL),
+	PINMUX(LD3,   DISPA,      NORMAL,    NORMAL),
+	PINMUX(LD4,   DISPA,      NORMAL,    NORMAL),
+	PINMUX(LD5,   DISPA,      NORMAL,    NORMAL),
+	PINMUX(LD6,   DISPA,      NORMAL,    NORMAL),
+	PINMUX(LD7,   DISPA,      NORMAL,    NORMAL),
+	PINMUX(LD8,   DISPA,      NORMAL,    NORMAL),
+	PINMUX(LD9,   DISPA,      NORMAL,    NORMAL),
+	PINMUX(LDI,   DISPA,      NORMAL,    NORMAL),
+	PINMUX(LHP0,  DISPA,      NORMAL,    NORMAL),
+	PINMUX(LHP1,  DISPA,      NORMAL,    NORMAL),
+	PINMUX(LHP2,  DISPA,      NORMAL,    NORMAL),
+	PINMUX(LHS,   DISPA,      NORMAL,    NORMAL),
+	PINMUX(LM0,   RSVD4,      NORMAL,    NORMAL),
+	PINMUX(LPP,   DISPA,      NORMAL,    NORMAL),
+	PINMUX(LPW0,  RSVD4,      NORMAL,    NORMAL),
+	PINMUX(LPW1,  RSVD4,      NORMAL,    TRISTATE),
+	PINMUX(LPW2,  RSVD4,      NORMAL,    NORMAL),
+	PINMUX(LSC0,  DISPA,      NORMAL,    NORMAL),
+	PINMUX(LSPI,  DISPA,      NORMAL,    NORMAL),
+	PINMUX(LVP1,  DISPA,      NORMAL,    NORMAL),
+	PINMUX(LVS,   DISPA,      NORMAL,    NORMAL),
+	PINMUX(SLXD,  SPDIF,      NORMAL,    NORMAL),
+};
+
+/* Initialize the Tegra LCD panel and controller */
+void init_lcd(struct fdt_lcd *config)
+{
+	clk_init();
+	power_enable_partition(POWERP_3D);
+	tegra2_display_register(config);
+}
+
+void lcd_cursor_size(ushort width, ushort height)
+{
+	lcd_cursor_width = width;
+	lcd_cursor_height = height;
+}
+
+void lcd_toggle_cursor(void)
+{
+	ushort x, y;
+	uchar *dest;
+	ushort row;
+
+	x = console_col * lcd_cursor_width;
+	y = console_row * lcd_cursor_height;
+	dest = (uchar *)(lcd_base + y * lcd_line_length + x * (1 << LCD_BPP) /
+			8);
+
+	for (row = 0; row < lcd_cursor_height; ++row, dest += lcd_line_length) {
+		ushort *d = (ushort *)dest;
+		ushort color;
+		int i;
+
+		for (i = 0; i < lcd_cursor_width; ++i) {
+			color = *d;
+			color ^= lcd_color_fg;
+			*d = color;
+			++d;
+		}
+	}
+}
+
+void lcd_cursor_on(void)
+{
+	lcd_cursor_enabled = 1;
+	lcd_toggle_cursor();
+}
+void lcd_cursor_off(void)
+{
+	lcd_cursor_enabled = 0;
+	lcd_toggle_cursor();
+}
+
+char lcd_is_cursor_enabled(void)
+{
+	return lcd_cursor_enabled;
+}
+
+static void update_panel_size(struct fdt_lcd *config)
+{
+	panel_info.vl_col = config->width;
+	panel_info.vl_row = config->height;
+	panel_info.vl_bpix = config->log2_bpp;
+}
+
+/*
+ *  Main init function called by lcd driver.
+ *  Inits and then prints test pattern if required.
+ */
+
+void lcd_ctrl_init(void *lcdbase)
+{
+	int line_length, size;
+
+	/*
+	 * The framebuffer address should be specified in the device tree.
+	 * This FDT value should be the same as the one defined in Linux kernel;
+	 * otherwise, it causes screen flicker. The FDT value overrides the
+	 * framebuffer allocated at the top of memory by board_init_f().
+	 *
+	 * If the framebuffer address is not defined in the FDT, falls back to
+	 * use the address allocated by board_init_f().
+	 */
+	if (config.frame_buffer != ADDR_T_NONE) {
+		gd->fb_base = config.frame_buffer;
+		lcd_base = (void *)(gd->fb_base);
+	} else {
+		config.frame_buffer = (u32)lcd_base;
+	}
+
+	/* Make sure that we can acommodate the selected LCD */
+	assert(config.width <= LCD_MAX_WIDTH);
+	assert(config.height <= LCD_MAX_HEIGHT);
+	assert(config.log2_bpp <= LCD_MAX_LOG2_BPP);
+	if (config.width <= LCD_MAX_WIDTH && config.height <= LCD_MAX_HEIGHT &&
+			config.log2_bpp <= LCD_MAX_LOG2_BPP)
+		update_panel_size(&config);
+	size = lcd_get_size(&line_length),
+
+	/* call board specific hw init */
+	init_lcd(&config);
+
+	/* For write-through or cache off, change the LCD memory region */
+	if (!(config.cache_type & FDT_LCD_CACHE_WRITE_BACK))
+		mmu_set_region_dcache(config.frame_buffer, size,
+			config.cache_type & FDT_LCD_CACHE_WRITE_THROUGH ?
+				DCACHE_WRITETHROUGH : DCACHE_OFF);
+
+	/* Enable flushing after LCD writes if requested */
+	lcd_set_flush_dcache(config.cache_type & FDT_LCD_CACHE_FLUSH);
+
+	debug("LCD frame buffer at %p\n", lcd_base);
+}
+
+ulong calc_fbsize(void)
+{
+	return (panel_info.vl_col * panel_info.vl_row *
+		NBITS(panel_info.vl_bpix)) / 8;
+}
+
+void lcd_setcolreg(ushort regno, ushort red, ushort green, ushort blue)
+{
+}
+
+void lcd_early_init(const void *blob)
+{
+	/*
+	 * Go with the maximum size for now. We will fix this up after
+	 * relocation. These values are only used for memory alocation.
+	 */
+	panel_info.vl_col = LCD_MAX_WIDTH;
+	panel_info.vl_row = LCD_MAX_HEIGHT;
+	panel_info.vl_bpix = LCD_MAX_LOG2_BPP;
+}
+
+static int handle_stage(const void *blob)
+{
+	/* do the things for this stage */
+	switch (stage) {
+	case STAGE_START:
+		/* get panel details */
+		if (fdt_decode_lcd(blob, &config)) {
+			printf("No LCD information in device tree\n");
+			return -1;
+		}
+
+		/* TODO: put pinmux into the FDT */
+		pinmux_config_table(pinmux_cros_1, ARRAY_SIZE(pinmux_cros_1));
+
+		fdt_setup_gpio(&config.panel_vdd);
+		fdt_setup_gpio(&config.lvds_shutdown);
+		fdt_setup_gpio(&config.backlight_vdd);
+		fdt_setup_gpio(&config.backlight_en);
+
+		gpio_set_value(config.panel_vdd.gpio, 1);
+		break;
+
+	case STAGE_LVDS:
+		gpio_set_value(config.lvds_shutdown.gpio, 1);
+		break;
+
+	case STAGE_BACKLIGHT_VDD:
+		if (fdt_gpio_isvalid(&config.backlight_vdd))
+			gpio_set_value(config.backlight_vdd.gpio, 1);
+		break;
+
+	case STAGE_PWFM:
+		/* Enable PWM at 15/16 high, divider 1 */
+		pwfm_setup(config.pwfm, 1, 0xdf, 1);
+		break;
+
+	case STAGE_BACKLIGHT_EN:
+		gpio_set_value(config.backlight_en.gpio, 1);
+		break;
+
+	case STAGE_DONE:
+		break;
+	}
+
+	/* set up timer for next stage */
+	timer_next = timer_get_us() + config.panel_timings[stage] * 1000;
+
+	/* move to next stage */
+	stage++;
+	return 0;
+}
+
+int tegra_lcd_check_next_stage(const void *blob, int wait)
+{
+	int err = 0;
+
+	if (stage == STAGE_DONE)
+		return 0;
+
+	bootstage_start(BOOTSTAGE_LCD_WAIT, "lcd_wait");
+	do {
+		/* wait if we need to */
+		debug("%s: stage %d\n", __func__, stage);
+		if (stage != STAGE_START) {
+			int delay = timer_next - timer_get_us();
+
+			if (delay > 0) {
+				if (wait)
+					udelay(delay);
+				else
+					return 0;
+			}
+		}
+
+		if (handle_stage(blob))
+			err = -1;
+
+	} while (wait && !err && stage != STAGE_DONE);
+	bootstage_accum(BOOTSTAGE_LCD_WAIT);
+	return err;
+}
+
+void lcd_enable(void)
+{
+	/*
+	 * This will be done when tegra_lcd_check_next_stage() is called
+	 * board_late_init().
+	 */
+}