From 70ed869ea5f6b1d13d7b140c83ec0dcd8a127ddc Mon Sep 17 00:00:00 2001 From: Vivek Mahajan Date: Tue, 27 Oct 2009 12:18:55 +0530 Subject: ppc/85xx/pci: fsl_pci_init: pcie agent mode support 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 Signed-off-by: Kumar Gala --- drivers/pci/fsl_pci_init.c | 18 ++++++++++++++++-- 1 file changed, 16 insertions(+), 2 deletions(-) (limited to 'drivers') diff --git a/drivers/pci/fsl_pci_init.c b/drivers/pci/fsl_pci_init.c index 87944bfad5..8fbab68a20 100644 --- a/drivers/pci/fsl_pci_init.c +++ b/drivers/pci/fsl_pci_init.c @@ -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 */ -- cgit v1.2.3