1 files changed, 219 insertions, 0 deletions

diff --git a/firmware/target/arm/imx233/sony-nwz/lcd-nwze370.c b/firmware/target/arm/imx233/sony-nwz/lcd-nwze370.c
new file mode 100644
index 0000000000..999f4ee525
--- /dev/null
+++ b/firmware/target/arm/imx233/sony-nwz/lcd-nwze370.c
@@ -0,0 +1,219 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   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, void *data, int data_len)
+{
+    imx233_lcdif_set_data_swizzle(0);
+    imx233_lcdif_set_word_length(8);
+    imx233_lcdif_pio_send(false, 1, &reg);
+    imx233_lcdif_pio_send(true, data_len, data);
+}
+
+static void lcd_init_seq(void)
+{
+    // seems compatible with ILI9163
+    lcd_write_reg(1, NULL, 0); // software reset
+    lcd_write_reg(0x11, NULL, 0); // sleep out
+    mdelay(150);
+    /* format: (<cmd> <data size> <data0> <dataN>)+ */
+    static uint8_t init_seq[] =
+    {
+    /*  cmd  sz  data... */
+        0x26, 1, 4, /* Gamma Set */
+        0xb1, 2, 9, 0xd, /* Frame Rate */
+        0xc0, 2, 8, 0, /* Power Control 1 */
+        0xc1, 1, 5, /* Power Control 2 */
+        0xc5, 2, 0x31, 0x40, /* VCOM Control 1 */
+        0xc7, 1, 0xc8, /* VCOM Offset Control */
+        0xec, 1, 0xc, /* Unknown */
+        0x3a, 1, 5, /* Interface Pixel Format */
+        0x2a, 4, 0, 0, 0, 0x7f, /* Column Address */
+        0x2b, 4, 0, 0, 0, 0x9f, /* Page Address Set */
+        0x35, 1, 0, /* Tear Effect Line On */
+        0x36, 1, 0xc8, /* Memory access Control */
+        0xb4, 1, 0, /* Display Inversion */
+        0xb7, 1, 0, /* Source Driver Direction Control */
+        0xb8, 1, 0, /* Gate Driver Direction Control */
+        0xf2, 1, 1, /* Gamma Adjustment */
+        0xe0, 15, 0x3f, 0x20, 0x1d, 0x2d, 0x26, 0x0c, 0x4b, 0xb7,
+                  0x39, 0x17, 0x1d, 0x16, 0x16, 0x10, 0x00, /* Positive Gamma */
+        0xe1, 15, 0x00, 0x1f, 0x21, 0x12, 0x18, 0x13, 0x34, 0x48,
+                  0x46, 0x08, 0x21, 0x29, 0x28, 0x2f, 0x3f, /* Negative Gamma */
+        0x29, 0, /* Display On */
+    };
+
+    for(unsigned i = 0; i < sizeof(init_seq); )
+    {
+        lcd_write_reg(init_seq[i], &init_seq[i + 2], init_seq[i + 1]);
+        i += 2 + init_seq[i + 1];
+    }
+}
+
+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(2, 2, 2, 2);
+    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(0x11, NULL, 0);
+        lcd_write_reg(0x29, NULL, 0);
+    }
+    else
+    {
+        lcd_write_reg(0x28, NULL, 0);
+        lcd_write_reg(0x10, NULL, 0);
+    }
+}
+
+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();
+    uint32_t window = x << 8 | (x + w - 1) << 24;
+    lcd_write_reg(0x2a, &window, sizeof(window));
+    window = y << 8 | (y + h - 1) << 24;
+    lcd_write_reg(0x2b, &window, sizeof(window));
+    lcd_write_reg(0x2c, NULL, 0);
+
+    imx233_lcdif_wait_ready();
+    imx233_lcdif_set_data_swizzle(3);
+    imx233_lcdif_set_word_length(8);
+    /* 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 * 2, h);
+}
+