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

Browse source 
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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6
board/freescale/mpc8572ds/mpc8572ds.c
View file

@ -199,7 +199,7 @@ void pci_init_board(void)
pcie_ep ? "End Point" : "Root Complex", pcie_ep ? "End Point" : "Root Complex",
pci_info[num].regs); pci_info[num].regs);
first_free_busno = fsl_pci_init_port(&pci_info[num++], first_free_busno = fsl_pci_init_port(&pci_info[num++],
&pcie3_hose, first_free_busno); &pcie3_hose, first_free_busno, pcie_ep);
/* /*
* Activate ULI1575 legacy chip by performing a fake * Activate ULI1575 legacy chip by performing a fake
* memory access. Needed to make ULI RTC work. * memory access. Needed to make ULI RTC work.
@ -231,7 +231,7 @@ void pci_init_board(void)
pcie_ep ? "End Point" : "Root Complex", pcie_ep ? "End Point" : "Root Complex",
pci_info[num].regs); pci_info[num].regs);
first_free_busno = fsl_pci_init_port(&pci_info[num++], first_free_busno = fsl_pci_init_port(&pci_info[num++],
&pcie2_hose, first_free_busno); &pcie2_hose, first_free_busno, pcie_ep);
} else { } else {
printf (" PCIE2: disabled\n"); printf (" PCIE2: disabled\n");
} }
@ -251,7 +251,7 @@ void pci_init_board(void)
pcie_ep ? "End Point" : "Root Complex", pcie_ep ? "End Point" : "Root Complex",
pci_info[num].regs); pci_info[num].regs);
first_free_busno = fsl_pci_init_port(&pci_info[num++], first_free_busno = fsl_pci_init_port(&pci_info[num++],
&pcie1_hose, first_free_busno); &pcie1_hose, first_free_busno, pcie_ep);
} else { } else {
printf (" PCIE1: disabled\n"); printf (" PCIE1: disabled\n");
} }

4
board/freescale/p1_p2_rdb/pci.c
View file

@ -71,7 +71,7 @@ void pci_init_board(void)
pcie_ep ? "End Point" : "Root Complex", pcie_ep ? "End Point" : "Root Complex",
pci_info[num].regs); pci_info[num].regs);
first_free_busno = fsl_pci_init_port(&pci_info[num++], first_free_busno = fsl_pci_init_port(&pci_info[num++],
&pcie2_hose, first_free_busno); &pcie2_hose, first_free_busno, pcie_ep);
} else { } else {
printf (" PCIE2: disabled\n"); printf (" PCIE2: disabled\n");
} }
@ -90,7 +90,7 @@ void pci_init_board(void)
pcie_ep ? "End Point" : "Root Complex", pcie_ep ? "End Point" : "Root Complex",
pci_info[num].regs); pci_info[num].regs);
first_free_busno = fsl_pci_init_port(&pci_info[num++], first_free_busno = fsl_pci_init_port(&pci_info[num++],
&pcie1_hose, first_free_busno); &pcie1_hose, first_free_busno, pcie_ep);
} else { } else {
printf (" PCIE1: disabled\n"); printf (" PCIE1: disabled\n");
} }

6
board/freescale/p2020ds/p2020ds.c
View file

@ -227,7 +227,7 @@ void pci_init_board(void)
pcie_ep ? "End Point" : "Root Complex", pcie_ep ? "End Point" : "Root Complex",
pci_info[num].regs); pci_info[num].regs);
first_free_busno = fsl_pci_init_port(&pci_info[num++], first_free_busno = fsl_pci_init_port(&pci_info[num++],
&pcie2_hose, first_free_busno); &pcie2_hose, first_free_busno, pcie_ep);
/* /*
* The workaround doesn't work on p2020 because the location * The workaround doesn't work on p2020 because the location
@ -267,7 +267,7 @@ void pci_init_board(void)
pcie_ep ? "End Point" : "Root Complex", pcie_ep ? "End Point" : "Root Complex",
pci_info[num].regs); pci_info[num].regs);
first_free_busno = fsl_pci_init_port(&pci_info[num++], first_free_busno = fsl_pci_init_port(&pci_info[num++],
&pcie3_hose, first_free_busno); &pcie3_hose, first_free_busno, pcie_ep);
} else { } else {
printf(" PCIE3: disabled\n"); printf(" PCIE3: disabled\n");
} }
@ -286,7 +286,7 @@ void pci_init_board(void)
pcie_ep ? "End Point" : "Root Complex", pcie_ep ? "End Point" : "Root Complex",
pci_info[num].regs); pci_info[num].regs);
first_free_busno = fsl_pci_init_port(&pci_info[num++], first_free_busno = fsl_pci_init_port(&pci_info[num++],
&pcie1_hose, first_free_busno); &pcie1_hose, first_free_busno, pcie_ep);
} else { } else {
printf(" PCIE1: disabled\n"); printf(" PCIE1: disabled\n");
} }

4
board/sbc8548/sbc8548.c
View file

@ -359,7 +359,7 @@ pci_init_board(void)
SET_STD_PCI_INFO(pci_info[num], 1); SET_STD_PCI_INFO(pci_info[num], 1);
first_free_busno = fsl_pci_init_port(&pci_info[num++], first_free_busno = fsl_pci_init_port(&pci_info[num++],
&pci1_hose, first_free_busno); &pci1_hose, first_free_busno, 0);
} else { } else {
printf (" PCI: disabled\n"); printf (" PCI: disabled\n");
} }
@ -378,7 +378,7 @@ pci_init_board(void)
SET_STD_PCIE_INFO(pci_info[num], 1); SET_STD_PCIE_INFO(pci_info[num], 1);
printf (" PCIE at base address %lx\n", pci_info[num].regs); printf (" PCIE at base address %lx\n", pci_info[num].regs);
first_free_busno = fsl_pci_init_port(&pci_info[num++], first_free_busno = fsl_pci_init_port(&pci_info[num++],
&pcie1_hose, first_free_busno); &pcie1_hose, first_free_busno, 0);
} else { } else {
printf (" PCIE: disabled\n"); printf (" PCIE: disabled\n");
} }

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 * This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License * 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, 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; volatile ccsr_fsl_pci_t *pci;
struct pci_region *r; struct pci_region *r;
pci = (ccsr_fsl_pci_t *) pci_info->regs; 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 /* on non-PCIe controllers we don't have pme_msg_det so this code
* should do nothing since the read will return 0 * should do nothing since the read will return 0
*/ */

3
include/asm-ppc/fsl_pci.h
View file

@ -62,6 +62,7 @@ typedef struct pci_inbound_window {
#define PIWAR_LOCAL 0x00f00000 #define PIWAR_LOCAL 0x00f00000
#define PIWAR_READ_SNOOP 0x00050000 #define PIWAR_READ_SNOOP 0x00050000
#define PIWAR_WRITE_SNOOP 0x00005000 #define PIWAR_WRITE_SNOOP 0x00005000
#define PIWAR_IWS_4K 0x0000000b
u32 res2[3]; u32 res2[3];
} pit_t; } pit_t;
@ -171,7 +172,7 @@ struct fsl_pci_info {
}; };
int fsl_pci_init_port(struct fsl_pci_info *pci_info, 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);
#define SET_STD_PCI_INFO(x, num) \ #define SET_STD_PCI_INFO(x, num) \
{ \ { \