| 1 | |
| 2 | |
| 3 | * Functions for setting up and using a MPC106 northbridge
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| 4 | * Extracted from arch/powerpc/platforms/powermac/pci.c.
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| 5 | *
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| 6 | * Copyright (C) 2003 Benjamin Herrenschmuidt ([email protected])
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| 7 | * Copyright (C) 1997 Paul Mackerras ([email protected])
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| 8 |
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| 9 | #include <linux/kernel.h>
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| 10 | #include <linux/pci.h>
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| 11 | #include <linux/init.h>
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| 12 | #include <linux/of.h>
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| 13 |
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| 14 | #include <asm/io.h>
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| 15 | #include <asm/pci-bridge.h>
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| 16 | #include <asm/grackle.h>
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| 17 |
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| 18 | #define GRACKLE_CFA(b, d, o) (0x80 | ((b) << 8) | ((d) << 16) \
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| 19 | | (((o) & ~3) << 24))
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| 20 |
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| 21 | #define GRACKLE_PICR1_LOOPSNOOP 0x00000010
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| 22 |
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| 23 | static inline void grackle_set_loop_snoop(struct pci_controller *bp, int enable)
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| 24 | {
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| 25 | unsigned int val;
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| 26 |
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| 27 | out_be32(bp->cfg_addr, GRACKLE_CFA(0, 0, 0xa8));
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| 28 | val = in_le32(bp->cfg_data);
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| 29 | val = enable? (val | GRACKLE_PICR1_LOOPSNOOP) :
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| 30 | (val & ~GRACKLE_PICR1_LOOPSNOOP);
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| 31 | out_be32(bp->cfg_addr, GRACKLE_CFA(0, 0, 0xa8));
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| 32 | out_le32(bp->cfg_data, val);
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| 33 | (void)in_le32(bp->cfg_data);
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| 34 | }
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| 35 |
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| 36 | void __init setup_grackle(struct pci_controller *hose)
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| 37 | {
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| 38 | setup_indirect_pci(hose, 0xfec00000, 0xfee00000, 0);
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| 39 | if (of_machine_is_compatible("PowerMac1,1"))
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| 40 | pci_add_flags(PCI_REASSIGN_ALL_BUS);
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| 41 | if (of_machine_is_compatible("AAPL,PowerBook1998"))
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| 42 | grackle_set_loop_snoop(hose, 1);
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| 43 | }
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