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[POWERPC] 4xx: Add 440SPe revA runtime detection to PCIe 

This patch adds runtime detection of the 440SPe revision A chips. These
chips are equipped with a slighly different PCIe core and need special/
different initialization. The compatible node is changed to
"plb-pciex-440spe" ("A" and "B" dropped). This is needed for boards that
can be equipped with both PPC revisions like the AMCC Yucca.

Signed-off-by: Stefan Roese <sr@denx.de>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
This commit is contained in:
Stefan Roese 2007-12-21 15:39:38 +11:00 committed by Josh Boyer
parent 25c24f3dc7
commit accf5ef254
2 changed files with 20 additions and 11 deletions
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6
arch/powerpc/boot/dts/katmai.dts
View File

@ -267,7 +267,7 @@
#interrupt-cells = <1>;
#size-cells = <2>;
#address-cells = <3>;
compatible = "ibm,plb-pciex-440speB", "ibm,plb-pciex";
compatible = "ibm,plb-pciex-440spe", "ibm,plb-pciex";
primary;
port = <0>; /* port number */
reg = <d 00000000 20000000 /* Config space access */
@ -308,7 +308,7 @@
#interrupt-cells = <1>;
#size-cells = <2>;
#address-cells = <3>;
compatible = "ibm,plb-pciex-440speB", "ibm,plb-pciex";
compatible = "ibm,plb-pciex-440spe", "ibm,plb-pciex";
primary;
port = <1>; /* port number */
reg = <d 20000000 20000000 /* Config space access */
@ -349,7 +349,7 @@
#interrupt-cells = <1>;
#size-cells = <2>;
#address-cells = <3>;
compatible = "ibm,plb-pciex-440speB", "ibm,plb-pciex";
compatible = "ibm,plb-pciex-440spe", "ibm,plb-pciex";
primary;
port = <2>; /* port number */
reg = <d 40000000 20000000 /* Config space access */

25
arch/powerpc/sysdev/ppc4xx_pci.c
View File

@ -49,6 +49,15 @@ extern unsigned long total_memory;
#define RES_TO_U32_HIGH(val) (0)
#endif
static inline int ppc440spe_revA(void)
{
/* Catch both 440SPe variants, with and without RAID6 support */
if ((mfspr(SPRN_PVR) & 0xffefffff) == 0x53421890)
return 1;
else
return 0;
}
static void fixup_ppc4xx_pci_bridge(struct pci_dev *dev)
{
struct pci_controller *hose;
@ -516,8 +525,7 @@ static void __init ppc4xx_probe_pcix_bridge(struct device_node *np)
*
* We support 3 parts currently based on the compatible property:
*
* ibm,plb-pciex-440speA
* ibm,plb-pciex-440speB
* ibm,plb-pciex-440spe
* ibm,plb-pciex-405ex
*
* Anything else will be rejected for now as they are all subtly
@ -688,7 +696,7 @@ static int ppc440spe_pciex_init_port_hw(struct ppc4xx_pciex_port *port)
mtdcri(SDR0, port->sdr_base + PESDRn_DLPSET, val);
mtdcri(SDR0, port->sdr_base + PESDRn_UTLSET1, 0x20222222);
if (of_device_is_compatible(port->node, "ibm,plb-pciex-440speA"))
if (ppc440spe_revA())
mtdcri(SDR0, port->sdr_base + PESDRn_UTLSET2, 0x11000000);
mtdcri(SDR0, port->sdr_base + PESDRn_440SPE_HSSL0SET1, 0x35000000);
mtdcri(SDR0, port->sdr_base + PESDRn_440SPE_HSSL1SET1, 0x35000000);
@ -767,7 +775,6 @@ static struct ppc4xx_pciex_hwops ppc440speB_pcie_hwops __initdata =
.setup_utl = ppc440speB_pciex_init_utl,
};
#endif /* CONFIG_44x */
#ifdef CONFIG_40x
@ -881,10 +888,12 @@ static int __init ppc4xx_pciex_check_core_init(struct device_node *np)
return 0;
#ifdef CONFIG_44x
if (of_device_is_compatible(np, "ibm,plb-pciex-440speA"))
ppc4xx_pciex_hwops = &ppc440speA_pcie_hwops;
else if (of_device_is_compatible(np, "ibm,plb-pciex-440speB"))
ppc4xx_pciex_hwops = &ppc440speB_pcie_hwops;
if (of_device_is_compatible(np, "ibm,plb-pciex-440spe")) {
if (ppc440spe_revA())
ppc4xx_pciex_hwops = &ppc440speA_pcie_hwops;
else
ppc4xx_pciex_hwops = &ppc440speB_pcie_hwops;
}
#endif /* CONFIG_44x */
#ifdef CONFIG_40x
if (of_device_is_compatible(np, "ibm,plb-pciex-405ex"))