diff options
author | Bjorn Helgaas <bjorn.helgaas@hp.com> | 2007-05-08 03:36:00 -0400 |
---|---|---|
committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-05-08 14:15:23 -0400 |
commit | a1e7e636fe9fff531a4fc42e65c8e8416fde5220 (patch) | |
tree | dcc11bc52b2a6be8b1da53d9a7b22b37595a209b /drivers | |
parent | 8f81dd149806bc53c68c92f34d61f88427079039 (diff) |
PNP: workaround HP BIOS defect that leaves SMCF010 device partly enabled
Some HP/Compaq firmware reports via ACPI that the SMCF010 IR device is
enabled, but in fact, it leaves the device partly disabled.
HP nw8240 BIOS 68DTV Ver. F.0F, released 9/15/2005 is one BIOS that has this
problem.
Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Cc: Keith Owens <kaos@ocs.com.au>
Cc: Len Brown <lenb@kernel.org>
Cc: Adam Belay <ambx1@neo.rr.com>
Cc: Matthieu CASTET <castet.matthieu@free.fr>
Cc: Jean Tourrilhes <jt@hpl.hp.com>
Cc: Matthew Garrett <mjg59@srcf.ucam.org>
Cc: Ville Syrjala <syrjala@sci.fi>
Cc: Russell King <rmk+serial@arm.linux.org.uk>
Cc: Samuel Ortiz <samuel@sortiz.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/pnp/quirks.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/drivers/pnp/quirks.c b/drivers/pnp/quirks.c index e97ecefe8584..277df50c89ae 100644 --- a/drivers/pnp/quirks.c +++ b/drivers/pnp/quirks.c | |||
@@ -16,6 +16,7 @@ | |||
16 | #include <linux/string.h> | 16 | #include <linux/string.h> |
17 | #include <linux/slab.h> | 17 | #include <linux/slab.h> |
18 | #include <linux/pnp.h> | 18 | #include <linux/pnp.h> |
19 | #include <linux/io.h> | ||
19 | #include "base.h" | 20 | #include "base.h" |
20 | 21 | ||
21 | 22 | ||
@@ -106,6 +107,34 @@ static void quirk_sb16audio_resources(struct pnp_dev *dev) | |||
106 | return; | 107 | return; |
107 | } | 108 | } |
108 | 109 | ||
110 | static void quirk_smc_enable(struct pnp_dev *dev) | ||
111 | { | ||
112 | unsigned int firbase; | ||
113 | |||
114 | if (!dev->active || !pnp_port_valid(dev, 1)) | ||
115 | return; | ||
116 | |||
117 | /* | ||
118 | * On the HP/Compaq nw8240 (and probably other similar machines), | ||
119 | * there is an SMCF010 device with two I/O port regions: | ||
120 | * | ||
121 | * 0x3e8-0x3ef SIR | ||
122 | * 0x100-0x10f FIR | ||
123 | * | ||
124 | * _STA reports the device is enabled, but in fact, the BIOS | ||
125 | * neglects to enable the FIR range. Fortunately, it does fully | ||
126 | * enable the device if we call _SRS. | ||
127 | */ | ||
128 | firbase = pnp_port_start(dev, 1); | ||
129 | if (inb(firbase + 0x7 /* IRCC_MASTER */) == 0xff) { | ||
130 | pnp_err("%s (%s) enabled but not responding, disabling and " | ||
131 | "re-enabling", dev->dev.bus_id, pnp_dev_name(dev)); | ||
132 | pnp_disable_dev(dev); | ||
133 | pnp_activate_dev(dev); | ||
134 | } | ||
135 | } | ||
136 | |||
137 | |||
109 | /* | 138 | /* |
110 | * PnP Quirks | 139 | * PnP Quirks |
111 | * Cards or devices that need some tweaking due to incomplete resource info | 140 | * Cards or devices that need some tweaking due to incomplete resource info |
@@ -126,6 +155,7 @@ static struct pnp_fixup pnp_fixups[] = { | |||
126 | { "CTL0043", quirk_sb16audio_resources }, | 155 | { "CTL0043", quirk_sb16audio_resources }, |
127 | { "CTL0044", quirk_sb16audio_resources }, | 156 | { "CTL0044", quirk_sb16audio_resources }, |
128 | { "CTL0045", quirk_sb16audio_resources }, | 157 | { "CTL0045", quirk_sb16audio_resources }, |
158 | { "SMCf010", quirk_smc_enable }, | ||
129 | { "" } | 159 | { "" } |
130 | }; | 160 | }; |
131 | 161 | ||