From af2a3b74f49e25446aeeeddb613ba53d85996532 Mon Sep 17 00:00:00 2001
From: Vencislav Atanasov <user890104@freemyipod.org>
Date: Tue, 22 Sep 2026 23:24:46 +0300
Subject: [PATCH] ipodnano3g: Show a QR code if the NAND is not supported

Currently, the link points to the unofficial bootloader builds and installation instructions by freemyipod.org, but it can be changed at any time by the rockbox.org website maintainer.

Co-authored-by: ChatGPT-5.6 Luna
Change-Id: I05a78a6540ebcc0e03a1f12f5d765e69e68af00c
---
 bootloader/ipod-s5l87xx.c | 74 +++++++++++++++++++++++++++++++++++++--
 1 file changed, 72 insertions(+), 2 deletions(-)

diff --git a/bootloader/ipod-s5l87xx.c b/bootloader/ipod-s5l87xx.c
index c484ae97d8..2ff2206a57 100644
--- a/bootloader/ipod-s5l87xx.c
+++ b/bootloader/ipod-s5l87xx.c
@@ -887,6 +887,74 @@ static void devel_menu(void)
 }
 #endif /* S5L87XX_DEVELOPMENT_BOOTLOADER */
 
+static void lcd_qr_code(const char *data, unsigned int row_stride,
+    int x, int y, unsigned int qr_cols, unsigned int qr_rows,
+    unsigned int modules_scale, unsigned int margin_thickness)
+{
+    const unsigned int margin_size = margin_thickness * 2;
+    const unsigned int width = qr_cols * modules_scale + margin_size;
+    const unsigned int height = qr_rows * modules_scale + margin_size;
+
+    // -1 = align right, -2 = align center
+    const unsigned int x0 = x >= 0 ? (unsigned int)x : (LCD_WIDTH - width) / abs(x);
+    const unsigned int y0 = y >= 0 ? (unsigned int)y : (LCD_HEIGHT - height) / abs(y);
+
+    lcd_set_foreground(LCD_WHITE);
+    lcd_fillrect(x0, y0, width, height);
+
+    lcd_set_foreground(LCD_BLACK);
+    for (unsigned int row = 0; row < qr_rows; row++) {
+        for (unsigned int col = 0; col < qr_cols; col++) {
+            if (data[row * row_stride + col] != ' ') {
+                lcd_fillrect(
+                    x0 + margin_thickness + col * modules_scale,
+                    y0 + margin_thickness + row * modules_scale,
+                    modules_scale,
+                    modules_scale
+                );
+            }
+        }
+    }
+
+    lcd_update();
+}
+
+static const char qr_code_data[][22] = {
+    /*
+     * qrencode -o - -t ascii -s 1 -m 0 -i 'https://rockbox.org/IPNBL' | \
+     * cut -c 1,3,5,7,9,11,13,15,17,19,21,23,25,27,29,31,33,35,37,39,41 | \
+     * awk '{ print "\"" $0 "\"," }'
+     */
+
+    "#######  #    #######",
+    "#     # ## #  #     #",
+    "# ### #  ## # # ### #",
+    "# ### # # # # # ### #",
+    "# ### #  # ## # ### #",
+    "#     # ####  #     #",
+    "####### # # # #######",
+    "         ##          ",
+    "##### ######## # # # ",
+    "#   #   #### # #    #",
+    "      #    #  #     #",
+    "## # # # # ##   #### ",
+    "# ### ##  ###        ",
+    "        ## #  #  ####",
+    "####### ##  #   ### #",
+    "#     #   ###  # ##  ",
+    "# ### # # ####    ###",
+    "# ### # ### ###  ##  ",
+    "# ### # ####  # #    ",
+    "#     # # ## ##   # #",
+    "####### #    ## ##   ",
+};
+
+enum {
+    QR_COLS = sizeof(qr_code_data[0]) - 1,
+    QR_ROWS = sizeof(qr_code_data) / sizeof(qr_code_data[0]),
+    QR_STRIDE = sizeof(qr_code_data[0]),
+};
+
 void main(void)
 {
     int rc = 0;
@@ -1013,8 +1081,10 @@ void main(void)
             printf("Rockbox does not write to");
             printf("chips it has not been");
             printf("tested on.");
-            printf("Starting Apple firmware...");
-            sleep(8 * HZ);      /* long enough to read the message */
+            printf("Starting Apple firmware in 60s...");
+            lcd_qr_code(&qr_code_data[0][0], QR_STRIDE, -2, LCD_HEIGHT / 2, QR_COLS, QR_ROWS, 4, 8);
+            sleep(60 * HZ);      /* long enough to read the message and scan the QR code */
+            lcd_set_foreground(LCD_WHITE);
             rc = kernel_launch_onb();
             /* Only reached if the ONB could not be read from NOR */
             printf("Apple firmware failed: %d", rc);