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ACPI: thinkpad-acpi: check version of hot key firmware

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Check the HKEY firmware version (HKEY.MHKV handler), and refuse to load if
it is unknown.  Use this instead of the presence of HKEY.DHKV to detect hot
key mask capability.

Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Henrique de Moraes Holschuh 2007-09-23 11:39:03 -03:00 committed by Len Brown
parent 8fef502e5a
commit 1b6521dc84
1 changed files with 23 additions and 5 deletions
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28
drivers/misc/thinkpad_acpi.c
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@ -999,6 +999,7 @@ static int __init hotkey_init(struct ibm_init_struct *iibm)
int res, i;
int status;
int hkeyv;
vdbg_printk(TPACPI_DBG_INIT, "initializing hotkey subdriver\n");
@ -1024,18 +1025,35 @@ static int __init hotkey_init(struct ibm_init_struct *iibm)
return res;
/* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
A30, R30, R31, T20-22, X20-21, X22-24 */
tp_features.hotkey_mask =
acpi_evalf(hkey_handle, NULL, "DHKN", "qv");
A30, R30, R31, T20-22, X20-21, X22-24. Detected by checking
for HKEY interface version 0x100 */
if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
if ((hkeyv >> 8) != 1) {
printk(IBM_ERR "unknown version of the "
"HKEY interface: 0x%x\n", hkeyv);
printk(IBM_ERR "please report this to %s\n",
IBM_MAIL);
} else {
/*
* MHKV 0x100 in A31, R40, R40e,
* T4x, X31, and later
* */
tp_features.hotkey_mask = 1;
}
}
vdbg_printk(TPACPI_DBG_INIT, "hotkey masks are %s\n",
str_supported(tp_features.hotkey_mask));
if (tp_features.hotkey_mask) {
/* MHKA available in A31, R40, R40e, T4x, X31, and later */
if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
"MHKA", "qd"))
"MHKA", "qd")) {
printk(IBM_ERR
"missing MHKA handler, "
"please report this to %s\n",
IBM_MAIL);
hotkey_all_mask = 0x080cU; /* FN+F12, FN+F4, FN+F3 */
}
}
res = hotkey_get(&hotkey_orig_status, &hotkey_orig_mask);