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powerpc/85xx: Fix booting for P1021MDS boards 

P1021 processors have no dedicated ROM to store the QE microcode,
so the fimrware is stored externally, and it is U-Boot responsibility
to load it. It might be that the board is booting without QE, e.g.
currently U-Boot doesn't support QE for P1021MDS boards, which means
that QE isn't initialized, and so the board hangs early at boot.

This patch fixes the issue by marking QE as disabled and checking the
state in the probing code. U-Boot should fixup the state if it
initialized the QE.

Signed-off-by: Anton Vorontsov <avorontsov@mvista.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
This commit is contained in:
Anton Vorontsov 2010-06-08 09:55:50 +00:00 committed by Kumar Gala
parent bb863e85a7
commit dee9ad718b
2 changed files with 38 additions and 6 deletions
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1
arch/powerpc/boot/dts/p1021mds.dts
View File

@ -617,6 +617,7 @@
bus-frequency = <0>;
fsl,qe-num-riscs = <1>;
fsl,qe-num-snums = <28>;
status = "disabled"; /* no firmware loaded */
qeic: interrupt-controller@80 {
interrupt-controller;

43
arch/powerpc/platforms/85xx/mpc85xx_mds.c
View File

@ -158,6 +158,29 @@ static int mpc8568_mds_phy_fixups(struct phy_device *phydev)
extern void __init mpc85xx_smp_init(void);
#endif
#ifdef CONFIG_QUICC_ENGINE
static struct of_device_id mpc85xx_qe_ids[] __initdata = {
{ .type = "qe", },
{ .compatible = "fsl,qe", },
{ },
};
static void __init mpc85xx_publish_qe_devices(void)
{
struct device_node *np;
np = of_find_compatible_node(NULL, NULL, "fsl,qe");
if (!of_device_is_available(np)) {
of_node_put(np);
return;
}
of_platform_bus_probe(NULL, mpc85xx_qe_ids, NULL);
}
#else
static void __init mpc85xx_publish_qe_devices(void) { }
#endif /* CONFIG_QUICC_ENGINE */
static void __init mpc85xx_mds_setup_arch(void)
{
struct device_node *np;
@ -218,6 +241,11 @@ static void __init mpc85xx_mds_setup_arch(void)
return;
}
if (!of_device_is_available(np)) {
of_node_put(np);
return;
}
qe_reset();
of_node_put(np);
@ -369,8 +397,6 @@ static struct of_device_id mpc85xx_ids[] = {
{ .type = "soc", },
{ .compatible = "soc", },
{ .compatible = "simple-bus", },
{ .type = "qe", },
{ .compatible = "fsl,qe", },
{ .compatible = "gianfar", },
{ .compatible = "fsl,rapidio-delta", },
{ .compatible = "fsl,mpc8548-guts", },
@ -382,8 +408,6 @@ static struct of_device_id p1021_ids[] = {
{ .type = "soc", },
{ .compatible = "soc", },
{ .compatible = "simple-bus", },
{ .type = "qe", },
{ .compatible = "fsl,qe", },
{ .compatible = "gianfar", },
{},
};
@ -395,16 +419,16 @@ static int __init mpc85xx_publish_devices(void)
if (machine_is(mpc8569_mds))
simple_gpiochip_init("fsl,mpc8569mds-bcsr-gpio");
/* Publish the QE devices */
of_platform_bus_probe(NULL, mpc85xx_ids, NULL);
mpc85xx_publish_qe_devices();
return 0;
}
static int __init p1021_publish_devices(void)
{
/* Publish the QE devices */
of_platform_bus_probe(NULL, p1021_ids, NULL);
mpc85xx_publish_qe_devices();
return 0;
}
@ -443,12 +467,19 @@ static void __init mpc85xx_mds_pic_init(void)
mpic_init(mpic);
#ifdef CONFIG_QUICC_ENGINE
np = of_find_compatible_node(NULL, NULL, "fsl,qe");
if (!of_device_is_available(np)) {
of_node_put(np);
return;
}
np = of_find_compatible_node(NULL, NULL, "fsl,qe-ic");
if (!np) {
np = of_find_node_by_type(NULL, "qeic");
if (!np)
return;
}
if (machine_is(p1021_mds))
qe_ic_init(np, 0, qe_ic_cascade_low_mpic,
qe_ic_cascade_high_mpic);