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-rw-r--r--u-boot/board/davinci/sonata/board_init.S100
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diff --git a/u-boot/board/davinci/sonata/board_init.S b/u-boot/board/davinci/sonata/board_init.S
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+++ b/u-boot/board/davinci/sonata/board_init.S
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+/*
+ * Copyright (C) 2007 Sergey Kubushyn <ksi@koi8.net>
+ *
+ * Board-specific low level initialization code. Called at the very end
+ * of arch/arm/cpu/arm926ejs/davinci/lowlevel_init.S. Just returns if there is no
+ * initialization required.
+ *
+ * For _OLDER_ Sonata boards sets up GPIO4 to control NAND WP line. Newer
+ * Sonata boards, AFAIK, don't use this so it's just return by default. Ask
+ * Visioneering if they reinvented the wheel once again to make sure :)
+ *
+ * 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 <config.h>
+
+.globl dv_board_init
+dv_board_init:
+#ifdef SONATA_BOARD_GPIOWP
+ /* Set PINMUX0 to enable GPIO4 */
+ ldr r0, _PINMUX0
+ ldr r1, GPIO4_EN_MASK
+ ldr r2, [r0]
+ and r2, r2, r1
+ str r2, [r0]
+
+ /* Enable GPIO LPSC module */
+ ldr r0, PTSTAT
+
+gpio_ptstat_loop1:
+ ldr r2, [r0]
+ tst r2, $0x00000001
+ bne gpio_ptstat_loop1
+
+ ldr r1, MDCTL_GPIO
+ ldr r2, [r1]
+ and r2, r2, $0xfffffff8
+ orr r2, r2, $0x00000003
+ str r2, [r1]
+
+ orr r2, r2, $0x00000200
+ str r2, [r1]
+
+ ldr r1, PTCMD
+ mov r2, $0x00000001
+ str r2, [r1]
+
+gpio_ptstat_loop2:
+ ldr r2, [r0]
+ tst r2, $0x00000001
+ bne gpio_ptstat_loop2
+
+ ldr r0, MDSTAT_GPIO
+gpio_mdstat_loop:
+ ldr r2, [r0]
+ and r2, r2, $0x0000001f
+ teq r2, $0x00000003
+ bne gpio_mdstat_loop
+
+ /* GPIO4 -> output */
+ ldr r0, GPIO_DIR01
+ mov r1, $0x10
+ ldr r2, [r0]
+ bic r2, r2, r0
+ str r2, [r0]
+
+ /* Set it to 0 (Write Protect) */
+ ldr r0, GPIO_CLR_DATA01
+ str r1, [r0]
+#endif
+
+ mov pc, lr
+
+#ifdef SONATA_BOARD_GPIOWP
+.ltorg
+
+GPIO4_EN_MASK:
+ .word 0xf77fffff
+MDCTL_GPIO:
+ .word 0x01c41a68
+MDSTAT_GPIO:
+ .word 0x01c41868
+GPIO_DIR01:
+ .word 0x01c67010
+GPIO_CLR_DATA01:
+ .word 0x01c6701c
+#endif