diff options
| author | Paul Mundt <lethal@linux-sh.org> | 2009-04-17 16:38:00 +0900 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2009-04-17 16:38:00 +0900 |
| commit | c66c1d79a94a7a302e2dc6c93da40902423eac3e (patch) | |
| tree | e29bf59d813f623b3a71f5ccb2d0f8ac16fec051 /arch | |
| parent | ab78cbcf6877334fc20868b7df7887349e2e01c8 (diff) | |
sh: pci: Set pci_cache_line_size on SH7780 via the PCICLS register.
The SH7780 PCIC contains a read-only cache line size register that we can
derive pci_cache_line_size from. So, make sure that the software idea of
the cache line size actually matches the host controller's idea.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/sh/drivers/pci/pci-sh7780.c | 21 |
1 files changed, 12 insertions, 9 deletions
diff --git a/arch/sh/drivers/pci/pci-sh7780.c b/arch/sh/drivers/pci/pci-sh7780.c index 19bac2168f4..fa73b0d1588 100644 --- a/arch/sh/drivers/pci/pci-sh7780.c +++ b/arch/sh/drivers/pci/pci-sh7780.c @@ -22,15 +22,6 @@ #include <linux/delay.h> #include "pci-sh4.h" -/* - * Initialization. Try all known PCI access methods. Note that we support - * using both PCI BIOS and direct access: in such cases, we use I/O ports - * to access config space. - * - * Note that the platform specific initialization (BSC registers, and memory - * space mapping) will be called via the platform defined function - * pcibios_init_platform(). - */ int __init sh7780_pci_init(struct pci_channel *chan) { unsigned int id; @@ -70,19 +61,31 @@ int __init sh7780_pci_init(struct pci_channel *chan) if ((ret = sh4_pci_check_direct(chan)) != 0) return ret; + /* + * Platform specific initialization (BSC registers, and memory space + * mapping) will be called via the platform defined function + * pcibios_init_platform(). + */ return pcibios_init_platform(); } +extern u8 pci_cache_line_size; + int __init sh7780_pcic_init(struct pci_channel *chan, struct sh4_pci_address_map *map) { u32 word; + /* + * Set the class and sub-class codes. + */ __raw_writeb(PCI_CLASS_BRIDGE_HOST >> 8, chan->reg_base + SH7780_PCIBCC); __raw_writeb(PCI_CLASS_BRIDGE_HOST & 0xff, chan->reg_base + SH7780_PCISUB); + pci_cache_line_size = pci_read_reg(chan, SH7780_PCICLS) / 4; + /* set the command/status bits to: * Wait Cycle Control + Parity Enable + Bus Master + * Mem space enable |