netdev - [PATCH 2/3]: sky2: disable ASF on Yukon Supreme

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Message-ID: <20100207082450.736d8170@nehalam>
Date:	Sun, 7 Feb 2010 08:24:50 -0800
From:	Stephen Hemminger <shemminger@...tta.com>
To:	David Miller <davem@...emloft.net>
Cc:	netdev@...r.kernel.org
Subject: [PATCH 2/3]: sky2: disable ASF on Yukon Supreme

Clone of vendor code to disable ASF on Extreme and Supreme chips.

Signed-off-by: Stephen Hemminger <shemminger@...tta.com>


--- a/drivers/net/sky2.c	2010-02-03 09:24:17.943679463 -0800
+++ b/drivers/net/sky2.c	2010-02-03 09:24:19.203992300 -0800
@@ -3035,11 +3035,20 @@ static void sky2_reset(struct sky2_hw *h
 	u32 hwe_mask = Y2_HWE_ALL_MASK;
 
 	/* disable ASF */
-	if (hw->chip_id == CHIP_ID_YUKON_EX) {
+	if (hw->chip_id == CHIP_ID_YUKON_EX
+	    || hw->chip_id == CHIP_ID_YUKON_SUPR) {
+		sky2_write32(hw, CPU_WDOG, 0);
 		status = sky2_read16(hw, HCU_CCSR);
 		status &= ~(HCU_CCSR_AHB_RST | HCU_CCSR_CPU_RST_MODE |
 			    HCU_CCSR_UC_STATE_MSK);
+		/*
+		 * CPU clock divider shouldn't be used because
+		 * - ASF firmware may malfunction
+		 * - Yukon-Supreme: Parallel FLASH doesn't support divided clocks
+		 */
+		status &= ~HCU_CCSR_CPU_CLK_DIVIDE_MSK;
 		sky2_write16(hw, HCU_CCSR, status);
+		sky2_write32(hw, CPU_WDOG, 0);
 	} else
 		sky2_write8(hw, B28_Y2_ASF_STAT_CMD, Y2_ASF_RESET);
 	sky2_write16(hw, B0_CTST, Y2_ASF_DISABLE);
--
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