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authorJan Andersson <jan@gaisler.com>2011-05-03 20:11:57 +0200
committerGreg Kroah-Hartman <gregkh@suse.de>2011-05-03 11:43:21 -0700
commitc430131a02d677aa708f56342c1565edfdacb3c0 (patch)
tree15e9930a2512e4b05b7cfd4684f36dd26b0b990f /drivers/usb/early
parent2ce2c3ac8852cfc8f74f4b7b9a2c4cdff007f96a (diff)
downloadop-kernel-dev-c430131a02d677aa708f56342c1565edfdacb3c0.zip
op-kernel-dev-c430131a02d677aa708f56342c1565edfdacb3c0.tar.gz
USB: EHCI: Support controllers with big endian capability regs
The two first HC capability registers (CAPLENGTH and HCIVERSION) are defined as one 8-bit and one 16-bit register. Most HC implementations have selected to treat these registers as part of a 32-bit register, giving the same layout for both big and small endian systems. This patch adds a new quirk, big_endian_capbase, to support controllers with big endian register interfaces that treat HCIVERSION and CAPLENGTH as individual registers. Signed-off-by: Jan Andersson <jan@gaisler.com> Acked-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/early')
-rw-r--r--drivers/usb/early/ehci-dbgp.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/usb/early/ehci-dbgp.c b/drivers/usb/early/ehci-dbgp.c
index a6a350f..1fc8f12 100644
--- a/drivers/usb/early/ehci-dbgp.c
+++ b/drivers/usb/early/ehci-dbgp.c
@@ -102,6 +102,9 @@ static struct kgdb_io kgdbdbgp_io_ops;
#define dbgp_kgdb_mode (0)
#endif
+/* Local version of HC_LENGTH macro as ehci struct is not available here */
+#define EARLY_HC_LENGTH(p) (0x00ff & (p)) /* bits 7 : 0 */
+
/*
* USB Packet IDs (PIDs)
*/
@@ -892,7 +895,7 @@ int __init early_dbgp_init(char *s)
dbgp_printk("ehci_bar: %p\n", ehci_bar);
ehci_caps = ehci_bar;
- ehci_regs = ehci_bar + HC_LENGTH(readl(&ehci_caps->hc_capbase));
+ ehci_regs = ehci_bar + EARLY_HC_LENGTH(readl(&ehci_caps->hc_capbase));
ehci_debug = ehci_bar + offset;
ehci_dev.bus = bus;
ehci_dev.slot = slot;
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