ppc32: Fix MPC52xx PCI init in cas the bootloader didn't do it
We were counting on the bootloader to init some stuff, like get
the bus out of reset and enable accesses.
Signed-off-by: Sylvain Munaut <tnt at 246tNt.com>
---
commit ebf0598ce7564d4c1db16d995e609923bbb2eba8
tree 3ba738b8bf64ebe609c5f8301f87b55d25c2d9fd
parent 20734ce8dc6fafd40c421bd275712d7bb6124d20
author Sylvain Munaut <tnt at 246tNt.com> Sun, 18 Dec 2005 20:09:13 +0100
committer Sylvain Munaut <tnt at 246tNt.com> Sun, 18 Dec 2005 20:09:13 +0100
arch/ppc/syslib/mpc52xx_pci.c | 10 ++++++----
1 files changed, 6 insertions(+), 4 deletions(-)
diff --git a/arch/ppc/syslib/mpc52xx_pci.c b/arch/ppc/syslib/mpc52xx_pci.c
index 2c5e6dd..313c96e 100644
--- a/arch/ppc/syslib/mpc52xx_pci.c
+++ b/arch/ppc/syslib/mpc52xx_pci.c
@@ -154,9 +154,12 @@ static struct pci_ops mpc52xx_pci_ops =
static void __init
mpc52xx_pci_setup(struct mpc52xx_pci __iomem *pci_regs)
{
+ u32 tmp;
/* Setup control regs */
- /* Nothing to do afaik */
+ tmp = in_be32(&pci_regs->scr);
+ tmp |= PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
+ out_be32(&pci_regs->scr, tmp);
/* Setup windows */
out_be32(&pci_regs->iw0btar, MPC52xx_PCI_IWBTAR_TRANSLATION(
@@ -197,13 +200,12 @@ mpc52xx_pci_setup(struct mpc52xx_pci __i
/* Not necessary and can be a bad thing if for example the bootloader
is displaying a splash screen or ... Just left here for
documentation purpose if anyone need it */
-#if 0
- u32 tmp;
tmp = in_be32(&pci_regs->gscr);
+#if 0
out_be32(&pci_regs->gscr, tmp | MPC52xx_PCI_GSCR_PR);
udelay(50);
- out_be32(&pci_regs->gscr, tmp);
#endif
+ out_be32(&pci_regs->gscr, tmp & ~MPC52xx_PCI_GSCR_PR);
}
static void
