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ppc/85xx/pci: fsl_pci_init: pcie agent mode support

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Originally written by Jason Jin and Mingkai Hu for mpc8536.

When QorIQ based board is configured as a PCIe agent, then unlock/enable
inbound PCI configuration cycles and init a 4K inbound memory window;
so that a PCIe host can access the PCIe agents SDRAM at address 0x0

* Supported in fsl_pci_init_port() after adding pcie_ep as a param
* Revamped copyright in drivers/pci/fsl_pci_init.c
* Mods in 85xx based board specific pci init after this change

Signed-off-by: Vivek Mahajan <vivek.mahajan@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
This commit is contained in:
Vivek Mahajan
2009-10-27 12:18:55 +05:30
committed by Kumar Gala
parent 273a28ad9e
commit 70ed869ea5
6 changed files with 28 additions and 13 deletions
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18
drivers/pci/fsl_pci_init.c
View File

@@ -1,5 +1,5 @@
/*
* Copyright 2007 Freescale Semiconductor, Inc.
* Copyright 2007-2009 Freescale Semiconductor, Inc.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
@@ -413,13 +413,27 @@ void fsl_pci_init(struct pci_controller *hose, u32 cfg_addr, u32 cfg_data)
}
int fsl_pci_init_port(struct fsl_pci_info *pci_info,
struct pci_controller *hose, int busno)
struct pci_controller *hose, int busno, int pcie_ep)
{
volatile ccsr_fsl_pci_t *pci;
struct pci_region *r;
pci = (ccsr_fsl_pci_t *) pci_info->regs;
if (pcie_ep) {
volatile pit_t *pi = &pci->pit[2];
pci_setup_indirect(hose, (u32)&pci->cfg_addr,
(u32)&pci->cfg_data);
out_be32(&pi->pitar, 0);
out_be32(&pi->piwbar, 0);
out_be32(&pi->piwar, PIWAR_EN | PIWAR_LOCAL |
PIWAR_READ_SNOOP | PIWAR_WRITE_SNOOP | PIWAR_IWS_4K);
fsl_pci_config_unlock(hose);
return 0;
}
/* on non-PCIe controllers we don't have pme_msg_det so this code
* should do nothing since the read will return 0
*/