diff options
author | Paul Mackerras <paulus@samba.org> | 2005-10-26 07:16:38 (GMT) |
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committer | Paul Mackerras <paulus@samba.org> | 2005-10-26 07:16:38 (GMT) |
commit | 830825d6c37a28061c0b6ca538a6411001cf3b2a (patch) | |
tree | 99ead002881c53e0eda644175ba43d4a166fa26e /arch/powerpc/sysdev | |
parent | 03501dab035ab7da5e1373f5e130cfd6346d3f21 (diff) | |
download | linux-fsl-qoriq-830825d6c37a28061c0b6ca538a6411001cf3b2a.tar.xz |
powerpc: Pull out MPC106 (grackle) initialization code into its own file
This is so that the 32-bit CHRP code can use it. The MPC106
initialization code is now in arch/powerpc/sysdev/grackle.c and
is controlled by CONFIG_PPC_MPC106.
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/sysdev')
-rw-r--r-- | arch/powerpc/sysdev/Makefile | 1 | ||||
-rw-r--r-- | arch/powerpc/sysdev/grackle.c | 64 |
2 files changed, 65 insertions, 0 deletions
diff --git a/arch/powerpc/sysdev/Makefile b/arch/powerpc/sysdev/Makefile index f3c9e61..97119c0 100644 --- a/arch/powerpc/sysdev/Makefile +++ b/arch/powerpc/sysdev/Makefile @@ -1,3 +1,4 @@ obj-$(CONFIG_MPIC) += mpic.o obj-$(CONFIG_PPC_INDIRECT_PCI) += indirect_pci.o obj-$(CONFIG_PPC_I8259) += i8259.o +obj-$(CONFIG_PPC_MPC106) += grackle.o diff --git a/arch/powerpc/sysdev/grackle.c b/arch/powerpc/sysdev/grackle.c new file mode 100644 index 0000000..b6ec793 --- /dev/null +++ b/arch/powerpc/sysdev/grackle.c @@ -0,0 +1,64 @@ +/* + * Functions for setting up and using a MPC106 northbridge + * Extracted from arch/powerpc/platforms/powermac/pci.c. + * + * Copyright (C) 2003 Benjamin Herrenschmuidt (benh@kernel.crashing.org) + * Copyright (C) 1997 Paul Mackerras (paulus@samba.org) + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + */ +#include <linux/kernel.h> +#include <linux/pci.h> +#include <linux/init.h> + +#include <asm/io.h> +#include <asm/prom.h> +#include <asm/pci-bridge.h> +#include <asm/grackle.h> + +#define GRACKLE_CFA(b, d, o) (0x80 | ((b) << 8) | ((d) << 16) \ + | (((o) & ~3) << 24)) + +#define GRACKLE_PICR1_STG 0x00000040 +#define GRACKLE_PICR1_LOOPSNOOP 0x00000010 + +/* N.B. this is called before bridges is initialized, so we can't + use grackle_pcibios_{read,write}_config_dword. */ +static inline void grackle_set_stg(struct pci_controller* bp, int enable) +{ + unsigned int val; + + out_be32(bp->cfg_addr, GRACKLE_CFA(0, 0, 0xa8)); + val = in_le32(bp->cfg_data); + val = enable? (val | GRACKLE_PICR1_STG) : + (val & ~GRACKLE_PICR1_STG); + out_be32(bp->cfg_addr, GRACKLE_CFA(0, 0, 0xa8)); + out_le32(bp->cfg_data, val); + (void)in_le32(bp->cfg_data); +} + +static inline void grackle_set_loop_snoop(struct pci_controller *bp, int enable) +{ + unsigned int val; + + out_be32(bp->cfg_addr, GRACKLE_CFA(0, 0, 0xa8)); + val = in_le32(bp->cfg_data); + val = enable? (val | GRACKLE_PICR1_LOOPSNOOP) : + (val & ~GRACKLE_PICR1_LOOPSNOOP); + out_be32(bp->cfg_addr, GRACKLE_CFA(0, 0, 0xa8)); + out_le32(bp->cfg_data, val); + (void)in_le32(bp->cfg_data); +} + +void __init setup_grackle(struct pci_controller *hose) +{ + setup_indirect_pci(hose, 0xfec00000, 0xfee00000); + if (machine_is_compatible("AAPL,PowerBook1998")) + grackle_set_loop_snoop(hose, 1); +#if 0 /* Disabled for now, HW problems ??? */ + grackle_set_stg(hose, 1); +#endif +} |