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ppc4xx: Pass PCIe root-complex/endpoint configuration to Linux via the fdt

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The PCIe root-complex/endpoint setup as configured via the "pcie_mode"
environment variable will now get passed to the Linux kernel by setting
the device_type property of the PCIe device tree node. For normal root-
complex configuration it will keep its defaults value of "pci" and for
endpoint configuration it will get changed to "pci-endpoint".

Signed-off-by: Stefan Roese <sr@denx.de>
This commit is contained in:
Stefan Roese 2008-04-22 12:20:32 +02:00
parent 58c5376ba6
commit 24bfedbd0b
2 changed files with 46 additions and 1 deletions
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42
cpu/ppc4xx/fdt.c
View File

@ -31,9 +31,46 @@
#include <libfdt.h>
#include <libfdt_env.h>
#include <fdt_support.h>
#include <asm/4xx_pcie.h>
DECLARE_GLOBAL_DATA_PTR;
/*
* Fixup all PCIe nodes by setting the device_type property
* to "pci-endpoint" instead is "pci" for endpoint ports.
* This property will get checked later by the Linux driver
* to properly configure the PCIe port in Linux (again).
*/
void fdt_pcie_setup(void *blob)
{
const char *compat = "ibm,plb-pciex";
const char *prop = "device_type";
const char *prop_val = "pci-endpoint";
const u32 *port;
int no;
int rc;
/* Search first PCIe node */
no = fdt_node_offset_by_compatible(blob, -1, compat);
while (no != -FDT_ERR_NOTFOUND) {
port = fdt_getprop(blob, no, "port", NULL);
if (port == NULL) {
printf("WARNING: could not find port property\n");
} else {
if (is_end_point(*port)) {
rc = fdt_setprop(blob, no, prop, prop_val,
strlen(prop_val) + 1);
if (rc < 0)
printf("WARNING: could not set %s for %s: %s.\n",
prop, compat, fdt_strerror(rc));
}
}
/* Jump to next PCIe node */
no = fdt_node_offset_by_compatible(blob, no, compat);
}
}
void ft_cpu_setup(void *blob, bd_t *bd)
{
sys_info_t sys_info;
@ -60,5 +97,10 @@ void ft_cpu_setup(void *blob, bd_t *bd)
* Note: aliases in the dts are required for this
*/
fdt_fixup_ethernet(blob, bd);
/*
* Fixup all available PCIe nodes by setting the device_type property
*/
fdt_pcie_setup(blob);
}
#endif /* CONFIG_OF_LIBFDT */

5
include/asm-ppc/4xx_pcie.h
View File

@ -8,10 +8,11 @@
* option) any later version.
*/
#include <ppc4xx.h>
#ifndef __4XX_PCIE_H
#define __4XX_PCIE_H
#include <ppc4xx.h>
#define DCRN_SDR0_CFGADDR 0x00e
#define DCRN_SDR0_CFGDATA 0x00f
@ -395,6 +396,7 @@ static inline void mdelay(int n)
udelay(1000);
}
#if defined(PCIE0_SDR)
static inline u32 sdr_base(int port)
{
switch (port) {
@ -409,5 +411,6 @@ static inline u32 sdr_base(int port)
#endif
}
}
#endif /* defined(PCIE0_SDR) */
#endif /* __4XX_PCIE_H */