1 files changed, 447 insertions, 0 deletions

diff --git a/firmware/target/arm/as3525/sansa-fuzev2/lcd-fuzev2.c b/firmware/target/arm/as3525/sansa-fuzev2/lcd-fuzev2.c
new file mode 100644
index 0000000000..bdf1c704e0
--- /dev/null
+++ b/firmware/target/arm/as3525/sansa-fuzev2/lcd-fuzev2.c
@@ -0,0 +1,447 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2008 by Dave Chapman
+ *
+ * LCD driver for the Sansa Fuze - controller unknown
+ *
+ * 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 software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+#include "config.h"
+
+#include "cpu.h"
+#include "lcd.h"
+#include "file.h"
+#include "debug.h"
+#include "system.h"
+#include "clock-target.h"
+#include "dbop-as3525.h"
+
+/* The controller is unknown, but some registers appear to be the same as the
+   HD66789R */
+static bool display_on = false; /* is the display turned on? */
+
+/* register defines */
+#define R_START_OSC             0x00
+#define R_DRV_OUTPUT_CONTROL    0x01
+#define R_DRV_WAVEFORM_CONTROL  0x02
+#define R_ENTRY_MODE            0x03
+#define R_COMPARE_REG1          0x04
+#define R_COMPARE_REG2          0x05
+
+#define R_DISP_CONTROL1     0x07
+#define R_DISP_CONTROL2     0x08
+#define R_DISP_CONTROL3     0x09
+
+#define R_FRAME_CYCLE_CONTROL 0x0b
+#define R_EXT_DISP_IF_CONTROL 0x0c
+
+#define R_POWER_CONTROL1    0x10
+#define R_POWER_CONTROL2    0x11
+#define R_POWER_CONTROL3    0x12
+#define R_POWER_CONTROL4    0x13
+
+#define R_RAM_ADDR_SET  0x21
+#define R_WRITE_DATA_2_GRAM 0x22
+
+#define R_GAMMA_FINE_ADJ_POS1   0x30
+#define R_GAMMA_FINE_ADJ_POS2   0x31
+#define R_GAMMA_FINE_ADJ_POS3   0x32
+#define R_GAMMA_GRAD_ADJ_POS    0x33
+
+#define R_GAMMA_FINE_ADJ_NEG1   0x34
+#define R_GAMMA_FINE_ADJ_NEG2   0x35
+#define R_GAMMA_FINE_ADJ_NEG3   0x36
+#define R_GAMMA_GRAD_ADJ_NEG    0x37
+
+#define R_GAMMA_AMP_ADJ_RES_POS     0x38
+#define R_GAMMA_AMP_AVG_ADJ_RES_NEG 0x39
+
+#define R_GATE_SCAN_POS         0x40
+#define R_VERT_SCROLL_CONTROL   0x41
+#define R_1ST_SCR_DRV_POS       0x42
+#define R_2ND_SCR_DRV_POS       0x43
+#define R_HORIZ_RAM_ADDR_POS    0x44
+#define R_VERT_RAM_ADDR_POS     0x45
+
+/* Flip Flag */
+#define R_ENTRY_MODE_HORZ_NORMAL 0x7030
+#define R_ENTRY_MODE_HORZ_FLIPPED 0x7000
+static unsigned short r_entry_mode = R_ENTRY_MODE_HORZ_NORMAL;
+#define R_ENTRY_MODE_VERT 0x7038
+#define R_ENTRY_MODE_SOLID_VERT  0x1038
+/* FIXME */
+#define R_ENTRY_MODE_VIDEO_NORMAL 0x7038
+#define R_ENTRY_MODE_VIDEO_FLIPPED 0x7018
+
+/* Reverse Flag */
+#define R_DISP_CONTROL_NORMAL 0x0004
+#define R_DISP_CONTROL_REV    0x0000
+static unsigned short r_disp_control_rev = R_DISP_CONTROL_NORMAL;
+
+static const int xoffset = 20;
+
+static inline void lcd_delay(int x)
+{
+    do {
+        asm volatile ("nop\n");
+    } while (x--);
+}
+
+static void as3525_dbop_init(void)
+{
+    CGU_DBOP = (1<<3) | AS3525_DBOP_DIV;
+
+    DBOP_TIMPOL_01 = 0xe167e167;
+    DBOP_TIMPOL_23 = 0xe167006e;
+
+    /* short count: 16 | output data width: 16 | readstrobe line */
+    DBOP_CTRL = (1<<18|1<<12|1<<3);
+
+    GPIOB_AFSEL = 0xfc;
+    GPIOC_AFSEL = 0xff;
+
+    DBOP_TIMPOL_23 = 0x6000e;
+
+    /* short count: 16|enable write|output data width: 16|read strobe line */
+    DBOP_CTRL = (1<<18|1<<16|1<<12|1<<3);
+    DBOP_TIMPOL_01 = 0x6e167;
+    DBOP_TIMPOL_23 = 0xa167e06f;
+
+    /* TODO: The OF calls some other functions here, but maybe not important */
+}
+
+static void lcd_write_cmd(short cmd)
+{
+    /* Write register */
+    DBOP_TIMPOL_23 = 0xa167006e;
+    dbop_write_data(&cmd, 1);
+
+    lcd_delay(4);
+
+    DBOP_TIMPOL_23 = 0xa167e06f;
+}
+
+static void lcd_write_reg(int reg, int value)
+{
+    int16_t data = value;
+
+    lcd_write_cmd(reg);
+    dbop_write_data(&data, 1);
+}
+
+/*** hardware configuration ***/
+
+void lcd_set_contrast(int val)
+{
+    (void)val;
+}
+
+void lcd_set_invert_display(bool yesno)
+{
+    r_disp_control_rev = yesno ? R_DISP_CONTROL_REV :
+                                 R_DISP_CONTROL_NORMAL;
+
+    if (display_on)
+    {
+        lcd_write_reg(R_DISP_CONTROL1, 0x0013 | r_disp_control_rev);
+    }
+
+}
+
+#ifdef HAVE_LCD_FLIP
+static bool display_flipped = false;
+
+/* turn the display upside down  */
+void lcd_set_flip(bool yesno)
+{
+    display_flipped = yesno;
+
+    r_entry_mode = yesno ? R_ENTRY_MODE_HORZ_FLIPPED :
+                           R_ENTRY_MODE_HORZ_NORMAL;
+}
+#endif
+
+static void _display_on(void)
+{
+    /* Initialise in the same way as the original firmare */
+
+    lcd_write_reg(R_DISP_CONTROL1, 0);
+    lcd_write_reg(R_POWER_CONTROL4, 0);
+
+    lcd_write_reg(R_POWER_CONTROL2, 0x3704);
+    lcd_write_reg(0x14, 0x1a1b);
+    lcd_write_reg(R_POWER_CONTROL1, 0x3860);
+    lcd_write_reg(R_POWER_CONTROL4, 0x40);
+
+    lcd_write_reg(R_POWER_CONTROL4, 0x60);
+
+    lcd_write_reg(R_POWER_CONTROL4, 0x70);
+    lcd_write_reg(R_DRV_OUTPUT_CONTROL, 277);
+    lcd_write_reg(R_DRV_WAVEFORM_CONTROL, (7<<8));
+    lcd_write_reg(R_ENTRY_MODE, r_entry_mode);
+    lcd_write_reg(R_DISP_CONTROL2, 0x01);
+    lcd_write_reg(R_FRAME_CYCLE_CONTROL, (1<<10));
+    lcd_write_reg(R_EXT_DISP_IF_CONTROL, 0);
+
+    lcd_write_reg(R_GAMMA_FINE_ADJ_POS1, 0x40);
+    lcd_write_reg(R_GAMMA_FINE_ADJ_POS2, 0x0687);
+    lcd_write_reg(R_GAMMA_FINE_ADJ_POS3, 0x0306);
+    lcd_write_reg(R_GAMMA_GRAD_ADJ_POS, 0x104);
+    lcd_write_reg(R_GAMMA_FINE_ADJ_NEG1, 0x0585);
+    lcd_write_reg(R_GAMMA_FINE_ADJ_NEG2, 255+66);
+    lcd_write_reg(R_GAMMA_FINE_ADJ_NEG3, 0x0687+128);
+    lcd_write_reg(R_GAMMA_GRAD_ADJ_NEG, 259);
+    lcd_write_reg(R_GAMMA_AMP_ADJ_RES_POS, 0);
+    lcd_write_reg(R_GAMMA_AMP_AVG_ADJ_RES_NEG, 0);
+
+    lcd_write_reg(R_1ST_SCR_DRV_POS, (LCD_WIDTH - 1));
+    lcd_write_reg(R_2ND_SCR_DRV_POS, 0);
+    lcd_write_reg(R_HORIZ_RAM_ADDR_POS, (LCD_WIDTH - 1));
+    lcd_write_reg(R_VERT_RAM_ADDR_POS, 0);
+    lcd_write_reg(0x46, (((LCD_WIDTH - 1) + xoffset) << 8) | xoffset);
+    lcd_write_reg(0x47, (LCD_HEIGHT - 1));
+    lcd_write_reg(0x48, 0x0);
+
+    lcd_write_reg(R_DISP_CONTROL1, 0x11);
+    lcd_write_reg(R_DISP_CONTROL1, 0x13 | r_disp_control_rev);
+
+    display_on = true;  /* must be done before calling lcd_update() */
+    lcd_update();
+}
+
+void lcd_init_device(void)
+{
+    as3525_dbop_init();
+
+    GPIOA_DIR |= (1<<5|1<<4|1<<3);
+    GPIOA_PIN(5) = 0;
+    GPIOA_PIN(3) = (1<<3);
+    GPIOA_PIN(4) = 0;
+    GPIOA_PIN(5) = (1<<5);
+
+    _display_on();
+}
+
+#if defined(HAVE_LCD_ENABLE)
+void lcd_enable(bool on)
+{
+    if (display_on == on)
+        return;
+
+    if(on)
+    {
+        lcd_write_reg(R_START_OSC, 1);
+        lcd_write_reg(R_POWER_CONTROL1, 0);
+        lcd_write_reg(R_POWER_CONTROL2, 0x3704);
+        lcd_write_reg(0x14, 0x1a1b);
+        lcd_write_reg(R_POWER_CONTROL1, 0x3860);
+        lcd_write_reg(R_POWER_CONTROL4, 0x40);
+        lcd_write_reg(R_POWER_CONTROL4, 0x60);
+        lcd_write_reg(R_POWER_CONTROL4, 112);
+        lcd_write_reg(R_DISP_CONTROL1, 0x11);
+        lcd_write_reg(R_DISP_CONTROL1, 0x13 | r_disp_control_rev);
+        display_on = true;
+        lcd_update();      /* Resync display */
+        send_event(LCD_EVENT_ACTIVATION, NULL);
+        sleep(0);
+
+    }
+    else
+    {
+        lcd_write_reg(R_DISP_CONTROL1, 0x22);
+        lcd_write_reg(R_DISP_CONTROL1, 0);
+        lcd_write_reg(R_POWER_CONTROL1, 1);
+        display_on = false;
+    }
+}
+#endif
+
+#if defined(HAVE_LCD_ENABLE) || defined(HAVE_LCD_SLEEP)
+bool lcd_active(void)
+{
+    return display_on;
+}
+#endif
+
+/*** update functions ***/
+
+/* FIXME : find the datasheet for this RENESAS controller so we identify the
+ * registers used in windowing code (not present in HD66789R) */
+
+/* Set horizontal window addresses */
+static void lcd_window_x(int xmin, int xmax)
+{
+    xmin += xoffset;
+    xmax += xoffset;
+    lcd_write_reg(R_HORIZ_RAM_ADDR_POS + 2, (xmax << 8) | xmin);
+    lcd_write_reg(R_RAM_ADDR_SET - 1, xmin);
+}
+
+/* Set vertical window addresses */
+static void lcd_window_y(int ymin, int ymax)
+{
+    lcd_write_reg(R_VERT_RAM_ADDR_POS + 2, ymax);
+    lcd_write_reg(R_VERT_RAM_ADDR_POS + 3, ymin);
+    lcd_write_reg(R_RAM_ADDR_SET, ymin);
+}
+
+static unsigned lcd_yuv_options = 0;
+
+void lcd_yuv_set_options(unsigned options)
+{
+    lcd_yuv_options = options;
+}
+
+/* Line write helper function for lcd_yuv_blit. Write two lines of yuv420. */
+extern void lcd_write_yuv420_lines(unsigned char const * const src[3],
+                                   int width,
+                                   int stride);
+extern void lcd_write_yuv420_lines_odither(unsigned char const * const src[3],
+                                   int width,
+                                   int stride,
+                                   int x_screen, /* To align dither pattern */
+                                   int y_screen);
+
+/* Performance function to blit a YUV bitmap directly to the LCD
+ * src_x, src_y, width and height should be even
+ * x, y, width and height have to be within LCD bounds
+ */
+void lcd_blit_yuv(unsigned char * const src[3],
+                  int src_x, int src_y, int stride,
+                  int x, int y, int width, int height)
+{
+    unsigned char const * yuv_src[3];
+    off_t z;
+
+    /* Sorry, but width and height must be >= 2 or else */
+    width &= ~1;
+    height >>= 1;
+
+    z = stride*src_y;
+    yuv_src[0] = src[0] + z + src_x;
+    yuv_src[1] = src[1] + (z >> 2) + (src_x >> 1);
+    yuv_src[2] = src[2] + (yuv_src[1] - src[1]);
+
+#ifdef HAVE_LCD_FLIP
+    lcd_write_reg(R_ENTRY_MODE,
+        display_flipped ? R_ENTRY_MODE_VIDEO_FLIPPED : R_ENTRY_MODE_VIDEO_NORMAL
+    );
+#else
+    lcd_write_reg(R_ENTRY_MODE, R_ENTRY_MODE_VIDEO_NORMAL);
+#endif
+
+    lcd_window_x(x, x + width - 1);
+
+    if (lcd_yuv_options & LCD_YUV_DITHER)
+    {
+        do
+        {
+            lcd_window_y(y, y + 1);
+
+            lcd_write_cmd(R_WRITE_DATA_2_GRAM);
+
+            lcd_write_yuv420_lines_odither(yuv_src, width, stride, x, y);
+            yuv_src[0] += stride << 1; /* Skip down two luma lines */
+            yuv_src[1] += stride >> 1; /* Skip down one chroma line */
+            yuv_src[2] += stride >> 1;
+            y += 2;
+        }
+        while (--height > 0);
+    }
+    else
+    {
+        do
+        {
+            lcd_window_y(y, y + 1);
+
+            lcd_write_cmd(R_WRITE_DATA_2_GRAM);
+
+            lcd_write_yuv420_lines(yuv_src, width, stride);
+            yuv_src[0] += stride << 1; /* Skip down two luma lines */
+            yuv_src[1] += stride >> 1; /* Skip down one chroma line */
+            yuv_src[2] += stride >> 1;
+            y += 2;
+        }
+        while (--height > 0);
+    }
+}
+
+/* Update the display.
+   This must be called after all other LCD functions that change the display. */
+void lcd_update(void)
+{
+    if (!display_on)
+        return;
+
+    lcd_write_reg(R_ENTRY_MODE, r_entry_mode);
+
+    lcd_window_x(0, LCD_WIDTH - 1);
+    lcd_window_y(0, LCD_HEIGHT - 1);
+
+    lcd_write_cmd(R_WRITE_DATA_2_GRAM);
+
+    dbop_write_data((fb_data*)lcd_framebuffer, LCD_WIDTH*LCD_HEIGHT);
+}
+
+/* Update a fraction of the display. */
+void lcd_update_rect(int x, int y, int width, int height)
+{
+    const fb_data *ptr;
+
+    if (!display_on)
+        return;
+
+    /* nothing to draw? */
+    if ((width <= 0) || (height <= 0) || (x >= LCD_WIDTH) || 
+        (y >= LCD_HEIGHT) || (x + width <= 0) || (y + height <= 0))
+        return;
+
+    if (x < 0)
+    {   /* clip left */
+        width += x;
+        x = 0;
+    }
+    if (y < 0)
+    {   /* clip top */
+        height += y;
+        y = 0;
+    }
+    if (x + width > LCD_WIDTH)
+        width = LCD_WIDTH - x; /* clip right */
+    if (y + height > LCD_HEIGHT)
+        height = LCD_HEIGHT - y; /* clip bottom */
+
+    lcd_write_reg(R_ENTRY_MODE, r_entry_mode);
+
+    /* we need to make x and width even to enable 32bit transfers */
+    width = (width + (x & 1) + 1) & ~1;
+    x &= ~1;
+
+    lcd_window_x(x, x + width - 1);
+    lcd_window_y(y, y + height -1);
+
+    lcd_write_cmd(R_WRITE_DATA_2_GRAM);
+
+    ptr = &lcd_framebuffer[y][x];
+
+    do
+    {
+        dbop_write_data(ptr, width);
+        ptr += LCD_WIDTH;
+    }
+    while (--height > 0);
+}