From: Alexey Galakhov <agalakhov@gmail.com>
To: barebox@lists.infradead.org
Cc: Alexey Galakhov <agalakhov@gmail.com>
Subject: [PATCH 2/3] friendlyarm-tiny210: use LEDs for boot errors
Date: Tue, 9 Jul 2013 21:23:16 +0600 [thread overview]
Message-ID: <1373383397-13205-3-git-send-email-agalakhov@gmail.com> (raw)
In-Reply-To: <1373383397-13205-1-git-send-email-agalakhov@gmail.com>
Signed-off-by: Alexey Galakhov <agalakhov@gmail.com>
---
arch/arm/boards/friendlyarm-tiny210/lowlevel.c | 28 +++++++++++++++++++++++-
1 file changed, 27 insertions(+), 1 deletion(-)
diff --git a/arch/arm/boards/friendlyarm-tiny210/lowlevel.c b/arch/arm/boards/friendlyarm-tiny210/lowlevel.c
index 0c7fbf3..9676094 100644
--- a/arch/arm/boards/friendlyarm-tiny210/lowlevel.c
+++ b/arch/arm/boards/friendlyarm-tiny210/lowlevel.c
@@ -33,6 +33,22 @@
#define IRAM_CODE_BASE 0xD0020010
+/* Tiny210 has 4 leds numbered from 0 to 3 at GPJ2 */
+static inline void __bare_init debug_led(int led, bool state)
+{
+ uint32_t r;
+ /* GPJ2CON: mode 0001=output */
+ r = readl(0xE0200280);
+ r &= ~(0xF << (4 * led));
+ r |= (0x1 << (4 * led));
+ writel(r, 0xE0200280);
+ /* GPJ2DAT: active low */
+ r = readl(0xE0200284);
+ r &= ~(1 << led);
+ r |= (state ? 0 : 1) << led;
+ writel(r, 0xE0200284);
+}
+
/*
* iROM boot from MMC
* TODO: replace this by native boot
@@ -76,18 +92,28 @@ void __bare_init barebox_arm_reset_vector(void)
s5p_init_pll();
#endif
+ debug_led(0, 1);
+
if (get_pc() < IRAM_CODE_BASE) /* Are we running from iRAM? */
/* No, we don't. */
goto boot;
s5p_init_dram_bank_ddr2(S5P_DMC0_BASE, 0x20E00323, 0, 0);
+ debug_led(1, 1);
+
if (! load_stage2((void*)(ld_var(_text) - 16),
- ld_var(_barebox_image_size) + 16))
+ ld_var(_barebox_image_size) + 16)) {
+ debug_led(3, 1);
while (1) { } /* hang */
+ }
+
+ debug_led(2, 1);
jump_sdram(IRAM_CODE_BASE - ld_var(_text));
+ debug_led(1, 0);
+
boot:
barebox_arm_entry(S3C_SDRAM_BASE, SZ_256M, 0);
}
--
1.7.10.4
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next prev parent reply other threads:[~2013-07-09 15:24 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-09 15:23 [PATCH 0/3] Fix friendlyarm-tiny210 regression Alexey Galakhov
2013-07-09 15:23 ` [PATCH 1/3] friendlyarm-tiny210: do not restart barebox twice Alexey Galakhov
2013-07-09 15:23 ` Alexey Galakhov [this message]
2013-07-09 15:23 ` [PATCH 3/3] friendlyarm-tiny210: add heartbeat LED Alexey Galakhov
2013-07-09 17:50 ` [PATCH 0/3] Fix friendlyarm-tiny210 regression Sascha Hauer
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