From 0f8cbc1829d9c7d9616fd29b366a99d037facdcd Mon Sep 17 00:00:00 2001 From: Jason Jin Date: Fri, 10 Oct 2008 11:41:01 +0800 Subject: [PATCH] Do not init SATA when disabled on 8536DS. SGMII and SATA share the serdes on MPC8536 CPU, When SATA disabled and the driver still try to access the SATA registers, the cpu will hangup. This patch try to fix this by reading the serdes status before the SATA initialize. Signed-off-by: Jason Jin Acked-by: Andy Fleming --- board/freescale/mpc8536ds/mpc8536ds.c | 12 ++++++++++++ lib_ppc/board.c | 16 ++++++++++++++-- 2 files changed, 26 insertions(+), 2 deletions(-) diff --git a/board/freescale/mpc8536ds/mpc8536ds.c b/board/freescale/mpc8536ds/mpc8536ds.c index 8216c70cae..3cf12fda56 100644 --- a/board/freescale/mpc8536ds/mpc8536ds.c +++ b/board/freescale/mpc8536ds/mpc8536ds.c @@ -608,6 +608,18 @@ get_board_ddr_clk(ulong dummy) } #endif +int is_sata_supported() +{ + volatile ccsr_gur_t *gur = (void *)(CFG_MPC85xx_GUTS_ADDR); + uint devdisr = gur->devdisr; + uint sdrs2_io_sel = + (gur->pordevsr & MPC85xx_PORDEVSR_SRDS2_IO_SEL) >> 27; + if (sdrs2_io_sel & 0x04) + return 0; + + return 1; +} + #if defined(CONFIG_OF_BOARD_SETUP) void ft_board_setup(void *blob, bd_t *bd) diff --git a/lib_ppc/board.c b/lib_ppc/board.c index c02ac62b37..564faf2c65 100644 --- a/lib_ppc/board.c +++ b/lib_ppc/board.c @@ -635,6 +635,16 @@ void board_init_f (ulong bootflag) /* NOTREACHED - relocate_code() does not return */ } +int __is_sata_supported() +{ + /* For some boards, when sata disabled by the switch, and the + * driver still access the sata registers, the cpu will hangup. + * please define platform specific is_sata_supported() if your + * board have such issue.*/ + return 1; +} +int is_sata_supported() __attribute__((weak, alias("__is_sata_supported"))); + /************************************************************************ * * This is the next part if the initialization sequence: we are now @@ -1105,8 +1115,10 @@ void board_init_r (gd_t *id, ulong dest_addr) #endif #if defined(CONFIG_CMD_SATA) - puts ("SATA: "); - sata_initialize (); + if (is_sata_supported()) { + puts("SATA: "); + sata_initialize(); + } #endif #ifdef CONFIG_LAST_STAGE_INIT -- 2.30.2