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[TG3]: 5784 / 5764 DMA engine lockup fix

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5784 and 5764 devices lock up when the link speed is 10Mbps, the CPMU
link speed mode is enabled, and the MAC clock is running at 1.5Mhz.  The
fix is to run the MAC clock at faster speeds.

Signed-off-by: Matt Carlson <mcarlson@broadcom.com>
Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Matt Carlson 2007-11-12 21:10:06 -08:00 committed by David S. Miller
parent 84af67fdf0
commit 9acb961e7d
2 changed files with 28 additions and 2 deletions
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15
drivers/net/tg3.c
View file

@ -6369,6 +6369,21 @@ static int tg3_reset_hw(struct tg3 *tp, int reset_phy)
val = tr32(TG3_CPMU_CTRL);
val &= ~(CPMU_CTRL_LINK_AWARE_MODE | CPMU_CTRL_LINK_IDLE_MODE);
tw32(TG3_CPMU_CTRL, val);
val = tr32(TG3_CPMU_LSPD_10MB_CLK);
val &= ~CPMU_LSPD_10MB_MACCLK_MASK;
val |= CPMU_LSPD_10MB_MACCLK_6_25;
tw32(TG3_CPMU_LSPD_10MB_CLK, val);
val = tr32(TG3_CPMU_LNK_AWARE_PWRMD);
val &= ~CPMU_LNK_AWARE_MACCLK_MASK;
val |= CPMU_LNK_AWARE_MACCLK_6_25;
tw32(TG3_CPMU_LNK_AWARE_PWRMD, val);
val = tr32(TG3_CPMU_HST_ACC);
val &= ~CPMU_HST_ACC_MACCLK_MASK;
val |= CPMU_HST_ACC_MACCLK_6_25;
tw32(TG3_CPMU_HST_ACC, val);
}
/* This works around an issue with Athlon chipsets on

15
drivers/net/tg3.h
View file

@ -857,13 +857,24 @@
#define CPMU_CTRL_LINK_IDLE_MODE 0x00000200
#define CPMU_CTRL_LINK_AWARE_MODE 0x00000400
#define CPMU_CTRL_LINK_SPEED_MODE 0x00004000
/* 0x3604 --> 0x360c unused */
#define TG3_CPMU_LSPD_10MB_CLK 0x00003604
#define CPMU_LSPD_10MB_MACCLK_MASK 0x001f0000
#define CPMU_LSPD_10MB_MACCLK_6_25 0x00130000
/* 0x3608 --> 0x360c unused */
#define TG3_CPMU_LSPD_1000MB_CLK 0x0000360c
#define CPMU_LSPD_1000MB_MACCLK_62_5 0x00000000
#define CPMU_LSPD_1000MB_MACCLK_12_5 0x00110000
#define CPMU_LSPD_1000MB_MACCLK_MASK 0x001f0000
/* 0x3610 --> 0x365c unused */
#define TG3_CPMU_LNK_AWARE_PWRMD 0x00003610
#define CPMU_LNK_AWARE_MACCLK_MASK 0x001f0000
#define CPMU_LNK_AWARE_MACCLK_6_25 0x00130000
/* 0x3614 --> 0x361c unused */
#define TG3_CPMU_HST_ACC 0x0000361c
#define CPMU_HST_ACC_MACCLK_MASK 0x001f0000
#define CPMU_HST_ACC_MACCLK_6_25 0x00130000
/* 0x3620 --> 0x365c unused */
#define TG3_CPMU_MUTEX_REQ 0x0000365c
#define CPMU_MUTEX_REQ_DRIVER 0x00001000