51 lines
1.7 KiB
Diff
51 lines
1.7 KiB
Diff
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From 11c5ff65fbdbea4d4839b9bc34467ebcb2bbf72c Mon Sep 17 00:00:00 2001
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From: Hans de Goede <hdegoede@redhat.com>
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Date: Tue, 30 Sep 2014 18:45:32 +0200
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Subject: [PATCH 10/13] sunxi: Fix gmac not working reliable on the Bananapi
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In order for the gmac nic to work reliable on the Bananapi, we need to set
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bits 10-12 GTXDC "GMAC Transmit Clock Delay Chain" of the GMAC clk register
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(0x01c20164) to 3.
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Without this about 9 out of 10 ethernet packets get lost, with this setting
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there is no packet loss.
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So far setting these bits is only necessary on the Bananapi, so this commit
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solves this with a bit of #ifdef CONFIG_BANANAPI code. If in the future we
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need to do something similar for other boards, we can create a specific
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CONFIG_FOO option for this then.
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Reported-by: Karsten Merker <merker@debian.org>
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Signed-off-by: Hans de Goede <hdegoede@redhat.com>
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Tested-by: Karsten Merker <merker@debian.org>
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Tested-by: Zoltan HERPAI <wigyori@openwrt.org>
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Tested-by: Tony Zhang <tony.zhang@lemaker.org>
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Acked-by: Ian Campbell <ijc@hellion.org.uk>
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---
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board/sunxi/gmac.c | 9 +++++++++
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1 file changed, 9 insertions(+)
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diff --git a/board/sunxi/gmac.c b/board/sunxi/gmac.c
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index e7ff952..6348d27 100644
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--- a/board/sunxi/gmac.c
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+++ b/board/sunxi/gmac.c
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@@ -24,6 +24,15 @@ int sunxi_gmac_initialize(bd_t *bis)
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CCM_GMAC_CTRL_GPIT_MII);
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#endif
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+ /*
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+ * In order for the gmac nic to work reliable on the Bananapi, we
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+ * need to set bits 10-12 GTXDC "GMAC Transmit Clock Delay Chain"
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+ * of the GMAC clk register to 3.
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+ */
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+#ifdef CONFIG_BANANAPI
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+ setbits_le32(&ccm->gmac_clk_cfg, 0x3 << 10);
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+#endif
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+
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/* Configure pin mux settings for GMAC */
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for (pin = SUNXI_GPA(0); pin <= SUNXI_GPA(16); pin++) {
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#ifdef CONFIG_RGMII
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--
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2.1.0
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