1 files changed, 259 insertions, 0 deletions

diff --git a/firmware/target/arm/imx233/sony-nwz/lcd-nwze360.c b/firmware/target/arm/imx233/sony-nwz/lcd-nwze360.c
new file mode 100644
index 0000000000..2a913103c2
--- /dev/null
+++ b/firmware/target/arm/imx233/sony-nwz/lcd-nwze360.c
@@ -0,0 +1,259 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (c) 2013 by Amaury Pouly
+ *
+ * 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 <sys/types.h> /* off_t */
+#include <string.h>
+#include "cpu.h"
+#include "system.h"
+#include "backlight-target.h"
+#include "lcd.h"
+#include "lcdif-imx233.h"
+#include "clkctrl-imx233.h"
+#include "pinctrl-imx233.h"
+#include "logf.h"
+
+#ifdef HAVE_LCD_ENABLE
+static bool lcd_on;
+#endif
+
+static void lcd_write_reg(uint8_t reg, uint8_t data)
+{
+    imx233_lcdif_wait_ready();
+    imx233_lcdif_set_data_swizzle(0);
+    imx233_lcdif_set_word_length(8);
+    imx233_lcdif_pio_send(false, 1, &reg);
+    if(reg != 0x22)
+        imx233_lcdif_pio_send(true, 1, &data);
+}
+
+static void lcd_init_seq(void)
+{
+    lcd_write_reg(0xea, 0);
+    lcd_write_reg(0xeb, 0x20);
+    lcd_write_reg(0xec, 0xc);
+    lcd_write_reg(0xed, 0xc4);
+    lcd_write_reg(0xe8, 0x38);
+    lcd_write_reg(0xe9, 0xe);
+    lcd_write_reg(0xf1, 1);
+    lcd_write_reg(0xf2, 8);
+    lcd_write_reg(0x2e, 0x86);
+    lcd_write_reg(0x29, 0xff);
+    lcd_write_reg(0xe4, 1);
+    lcd_write_reg(0xe5, 0x20);
+    lcd_write_reg(0xe7, 1);
+    lcd_write_reg(0x40, 0);
+    lcd_write_reg(0x41, 0);
+    lcd_write_reg(0x42, 0);
+    lcd_write_reg(0x43, 0x14);
+    lcd_write_reg(0x44, 0x14);
+    lcd_write_reg(0x45, 0x28);
+    lcd_write_reg(0x46, 0x11);
+    lcd_write_reg(0x47, 0x57);
+    lcd_write_reg(0x48, 5);
+    lcd_write_reg(0x49, 0x16);
+    lcd_write_reg(0x4a, 0x19);
+    lcd_write_reg(0x4b, 0x1a);
+    lcd_write_reg(0x4c, 0x1a);
+    lcd_write_reg(0x50, 0x17);
+    lcd_write_reg(0x51, 0x2b);
+    lcd_write_reg(0x52, 0x2b);
+    lcd_write_reg(0x53, 0x3f);
+    lcd_write_reg(0x54, 0x3f);
+    lcd_write_reg(0x55, 0x3f);
+    lcd_write_reg(0x56, 0x28);
+    lcd_write_reg(0x57, 0x6e);
+    lcd_write_reg(0x58, 5);
+    lcd_write_reg(0x59, 5);
+    lcd_write_reg(0x5a, 6);
+    lcd_write_reg(0x5b, 9);
+    lcd_write_reg(0x5c, 0x1a);
+    lcd_write_reg(0x5d, 0xcc);
+    lcd_write_reg(0x1b, 0x1b);
+    lcd_write_reg(0x1A, 1);
+    lcd_write_reg(0x24, 0x2f); // something special here
+    lcd_write_reg(0x25, 0x57); // something special here
+    lcd_write_reg(0x23, 0x8a);
+    lcd_write_reg(0x2f, 1);
+    lcd_write_reg(0x60, 0);
+    lcd_write_reg(0x16, 8);
+    lcd_write_reg(0x18, 0x36); // something special here
+    lcd_write_reg(0x19, 1);
+    udelay(5000);
+    lcd_write_reg(1, 0);
+    lcd_write_reg(0x1f, 0x88);
+    udelay(5000);
+    lcd_write_reg(0x1f, 0x80);
+    udelay(5000);
+    lcd_write_reg(0x1f, 0x90);
+    udelay(5000);
+    lcd_write_reg(0x1f, 0xD0);
+    udelay(5000);
+    lcd_write_reg(0x17, 6);
+    lcd_write_reg(0x37, 0);
+    lcd_write_reg(0x28, 0x38);
+    udelay(40000);
+    lcd_write_reg(0x28, 0x3c);
+}
+
+void lcd_init_device(void)
+{
+    /* the LCD seems to work at 24Mhz, so use the xtal clock with no divider */
+    imx233_clkctrl_enable(CLK_PIX, false);
+    imx233_clkctrl_set_div(CLK_PIX, 1);
+    imx233_clkctrl_set_bypass(CLK_PIX, true); /* use XTAL */
+    imx233_clkctrl_enable(CLK_PIX, true);
+    imx233_lcdif_init();
+    imx233_lcdif_set_lcd_databus_width(8);
+    imx233_lcdif_set_timings(1, 1, 1, 1);
+    imx233_lcdif_enable_underflow_recover(true);
+    imx233_lcdif_setup_system_pins(8);
+    imx233_lcdif_set_byte_packing_format(0xf); /* two pixels per 32-bit word */
+
+    // reset device
+    imx233_lcdif_reset_lcd(true);
+    mdelay(10);
+    imx233_lcdif_reset_lcd(false);
+    mdelay(10);
+    imx233_lcdif_reset_lcd(true);
+    mdelay(150);
+
+    lcd_init_seq();
+#ifdef HAVE_LCD_ENABLE
+    lcd_on = true;
+#endif
+}
+
+#ifdef HAVE_LCD_ENABLE
+bool lcd_active(void)
+{
+    return lcd_on;
+}
+
+static void lcd_enable_seq(bool enable)
+{
+    if(!enable)
+    {
+        lcd_write_reg(0x1f, 0xd1);
+        lcd_write_reg(1, 0x40);
+        lcd_write_reg(1, 0xc0);
+        lcd_write_reg(0x19, 1);
+    }
+    else
+    {
+        lcd_write_reg(0x19, 0x81);
+        udelay(5000);
+        lcd_write_reg(1, 0x40);
+        udelay(20000);
+        lcd_write_reg(1, 0);
+        lcd_write_reg(0x1f, 0xd0);
+    }
+}
+
+void lcd_enable(bool enable)
+{
+    if(lcd_on == enable)
+        return;
+
+    lcd_on = enable;
+
+    if(enable)
+        imx233_lcdif_enable(true);
+    lcd_enable_seq(enable);
+    if(!enable)
+        imx233_lcdif_enable(false);
+    else
+        send_event(LCD_EVENT_ACTIVATION, NULL);
+}
+#endif
+
+void lcd_update(void)
+{
+    lcd_update_rect(0, 0, LCD_WIDTH, LCD_HEIGHT);
+}
+
+void lcd_update_rect(int x, int y, int w, int h)
+{
+#ifdef HAVE_LCD_ENABLE
+    if(!lcd_on)
+        return;
+#endif
+    /* make sure the rectangle is included in the screen */
+    x = MIN(x, LCD_WIDTH);
+    y = MIN(y, LCD_HEIGHT);
+    w = MIN(w, LCD_WIDTH - x);
+    h = MIN(h, LCD_HEIGHT - y);
+
+    imx233_lcdif_wait_ready();
+    lcd_write_reg(2, x >> 8);
+    lcd_write_reg(3, x & 0xff);
+    lcd_write_reg(4, (x + w - 1) >> 8);
+    lcd_write_reg(5, (x + w - 1) & 0xff);
+    lcd_write_reg(6, y >> 8);
+    lcd_write_reg(7, y & 0xff);
+    lcd_write_reg(8, (y + h - 1) >> 8);
+    lcd_write_reg(9, (y + h - 1) & 0xff);
+    lcd_write_reg(0x22, 0);
+
+    imx233_lcdif_wait_ready();
+    imx233_lcdif_set_word_length(16);
+    /* there are two cases here:
+     * - either width = LCD_WIDTH and we can directly memcopy a part of lcd_framebuffer to FRAME
+     *   and send it
+     * - either width != LCD_WIDTH and we have to build a contiguous copy of the rectangular area
+     *   into FRAME before sending it (which is slower and doesn't use the hardware)
+     * In all cases, FRAME just acts as a temporary buffer.
+     * NOTE It's more interesting to do a copy to FRAME in all cases since in system mode
+     * the clock runs at 24MHz which provides barely 10MB/s bandwidth compared to >100MB/s
+     * for memcopy operations
+     */
+    if(w == LCD_WIDTH)
+    {
+        memcpy((void *)FRAME, FBADDR(x,y), w * h * sizeof(fb_data));
+    }
+    else
+    {
+        for(int i = 0; i < h; i++)
+            memcpy((fb_data *)FRAME + i * w, FBADDR(x,y + i), w * sizeof(fb_data));
+    }
+    /* WARNING The LCDIF has a limitation on the vertical count ! In 16-bit packed mode
+     * (which we used, ie 16-bit per pixel, 2 pixels per 32-bit words), the v_count
+     * field must be a multiple of 2. Furthermore, it seems the lcd controller doesn't
+     * really like when both w and h are even, probably because the writes to the GRAM
+     * are done on several words and the controller requires dummy writes.
+     * The workaround is to always make sure that we send a number of pixels which is
+     * a multiple of 4 so that both the lcdif and the controller are happy. If any
+     * of w or h is odd, we will send a copy of the first pixels as dummy writes. We will
+     * send at most 3 bytes. We then send (w * h + 3) / 4 x 4 bytes.
+     */
+    if(w % 2 == 1 || h % 2 == 1)
+    {
+        /* copy three pixel after the last one */
+        for(int i = 0; i < 3; i++)
+            *((fb_data *)FRAME + w * h + i) = *((fb_data *)FRAME + i);
+        /* WARNING we need to update w and h to reflect the pixel count BUT it
+         * has no relation to w * h (it can even be 2 * prime). Hopefully, w <= 240 and
+         * h <= 320 so w * h <= 76800 and (w * h + 3) / 4 <= 38400 which fits into
+         * a 16-bit integer (horizontal count). */
+        h = (w * h + 3) / 4;
+        w = 4;
+    }
+    imx233_lcdif_dma_send((void *)FRAME_PHYS_ADDR, w, h);
+}
+