Move most of the probing code to its own function, and most of the
subdriver-specific init code into subdriver init functions.
This allows us to not define pci_handle unless the dock subdriver is
enabled, as well.
This patch causes a minor userland interface change: if a subdriver doesn't
detect a capability, /proc entries for it are not created anymore (as
opposed to a /proc entry that just returned "unsupported").
Signed-off-by: Henrique de Moraes Holschuh <hmh@xxxxxxxxxx>
---
drivers/misc/thinkpad_acpi.c | 231 +++++++++++++++++++++++++++---------------
drivers/misc/thinkpad_acpi.h | 4 +-
2 files changed, 151 insertions(+), 84 deletions(-)
diff --git a/drivers/misc/thinkpad_acpi.c b/drivers/misc/thinkpad_acpi.c
index 7fa906f..eeab394 100644
--- a/drivers/misc/thinkpad_acpi.c
+++ b/drivers/misc/thinkpad_acpi.c
@@ -277,9 +277,9 @@ static int _sta(acpi_handle handle)
* ACPI device model
*/
-static void __init ibm_handle_init(char *name,
- acpi_handle * handle, acpi_handle parent,
- char **paths, int num_paths, char **path)
+static void ibm_handle_init(char *name,
+ acpi_handle *handle, acpi_handle parent,
+ char **paths, int num_paths, char **path)
{
int i;
acpi_status status;
@@ -351,8 +351,8 @@ static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
ibm->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
if (!ibm->driver) {
- printk(IBM_ERR "kmalloc(ibm->driver) failed\n");
- return -1;
+ printk(IBM_ERR "kzalloc(ibm->driver) failed\n");
+ return -ENOMEM;
}
sprintf(ibm->driver->name, "%s_%s", IBM_NAME, ibm->name);
@@ -364,7 +364,9 @@ static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
printk(IBM_ERR "acpi_bus_register_driver(%s) failed: %d\n",
ibm->hid, ret);
kfree(ibm->driver);
- }
+ ibm->driver = NULL;
+ } else if (!ret)
+ ibm->driver_registered = 1;
return ret;
}
@@ -495,6 +497,8 @@ static int hotkey_orig_mask;
static int hotkey_init(void)
{
+ IBM_HANDLE_INIT(hkey);
+
/* hotkey not supported on 570 */
hotkey_supported = hkey_handle != NULL;
@@ -508,13 +512,14 @@ static int hotkey_init(void)
return -ENODEV;
}
- return 0;
+ return (hotkey_supported)? 0 : 1;
}
static void hotkey_exit(void)
{
- if (hotkey_supported)
+ if (hotkey_supported) {
hotkey_set(hotkey_orig_status, hotkey_orig_mask);
+ }
}
static void hotkey_notify(struct ibm_struct *ibm, u32 event)
@@ -628,12 +633,14 @@ static int bluetooth_supported;
static int bluetooth_init(void)
{
+ IBM_HANDLE_INIT(hkey);
+
/* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
bluetooth_supported = hkey_handle &&
acpi_evalf(hkey_handle, NULL, "GBDC", "qv");
- return 0;
+ return (bluetooth_supported)? 0 : 1;
}
static int bluetooth_status(void)
@@ -697,10 +704,12 @@ static int wan_supported;
static int wan_init(void)
{
+ IBM_HANDLE_INIT(hkey);
+
wan_supported = hkey_handle &&
acpi_evalf(hkey_handle, NULL, "GWAN", "qv");
- return 0;
+ return (wan_supported)? 0 : 1;
}
static int wan_status(void)
@@ -775,6 +784,9 @@ static int video_init(void)
{
int ivga;
+ IBM_HANDLE_INIT(vid);
+ IBM_HANDLE_INIT(vid2);
+
if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
/* G41, assume IVGA doesn't change */
vid_handle = vid2_handle;
@@ -792,7 +804,7 @@ static int video_init(void)
/* all others */
video_supported = TPACPI_VIDEO_NEW;
- return 0;
+ return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
}
static void video_exit(void)
@@ -979,6 +991,10 @@ IBM_HANDLE(ledb, ec, "LEDB"); /* G4x */
static int light_init(void)
{
+ IBM_HANDLE_INIT(ledb);
+ IBM_HANDLE_INIT(lght);
+ IBM_HANDLE_INIT(cmos);
+
/* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
light_supported = (cmos_handle || lght_handle) && !ledb_handle;
@@ -988,7 +1004,7 @@ static int light_init(void)
light_status_supported = acpi_evalf(ec_handle, NULL,
"KBLT", "qv");
- return 0;
+ return (light_supported)? 0 : 1;
}
static int light_read(char *p)
@@ -1044,9 +1060,6 @@ static int light_write(char *buf)
* Dock subdriver
*/
-/* don't list other alternatives as we install a notify handler on the 570 */
-IBM_HANDLE(pci, root, "\\_SB.PCI"); /* 570 */
-
#ifdef CONFIG_THINKPAD_ACPI_DOCK
IBM_HANDLE(dock, root, "\\_SB.GDCK", /* X30, X31, X40 */
@@ -1055,8 +1068,19 @@ IBM_HANDLE(dock, root, "\\_SB.GDCK", /* X30, X31, X40 */
"\\_SB.PCI.ISA.SLCE", /* 570 */
); /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
+/* don't list other alternatives as we install a notify handler on the 570 */
+IBM_HANDLE(pci, root, "\\_SB.PCI"); /* 570 */
+
#define dock_docked() (_sta(dock_handle) & 1)
+static int dock_init(void)
+{
+ IBM_HANDLE_INIT(dock);
+ IBM_HANDLE_INIT(pci);
+
+ return (dock_handle)? 0 : 1;
+}
+
static void dock_notify(struct ibm_struct *ibm, u32 event)
{
int docked = dock_docked();
@@ -1147,6 +1171,13 @@ IBM_HANDLE(bay2_ej, bay2, "_EJ3", /* 600e/x, 770e, A3x */
static int bay_init(void)
{
+ IBM_HANDLE_INIT(bay);
+ if (bay_handle)
+ IBM_HANDLE_INIT(bay_ej);
+ IBM_HANDLE_INIT(bay2);
+ if (bay2_handle)
+ IBM_HANDLE_INIT(bay2_ej);
+
bay_status_supported = bay_handle &&
acpi_evalf(bay_handle, NULL, "_STA", "qv");
bay_status2_supported = bay2_handle &&
@@ -1157,7 +1188,8 @@ static int bay_init(void)
bay_eject2_supported = bay2_handle && bay2_ej_handle &&
(strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
- return 0;
+ return (bay_status_supported || bay_eject_supported ||
+ bay_status2_supported || bay_eject2_supported)? 0 : 1;
}
static void bay_notify(struct ibm_struct *ibm, u32 event)
@@ -1221,6 +1253,13 @@ static int bay_write(char *buf)
* CMOS subdriver
*/
+static int cmos_init(void)
+{
+ IBM_HANDLE_INIT(cmos);
+
+ return (cmos_handle)? 0 : 1;
+}
+
static int cmos_eval(int cmos_cmd)
{
if (cmos_handle)
@@ -1281,6 +1320,8 @@ IBM_HANDLE(led, ec, "SLED", /* 570 */
static int led_init(void)
{
+ IBM_HANDLE_INIT(led);
+
if (!led_handle)
/* led not supported on R30, R31 */
led_supported = TPACPI_LED_NONE;
@@ -1294,7 +1335,7 @@ static int led_init(void)
/* all others */
led_supported = TPACPI_LED_NEW;
- return 0;
+ return (led_supported != TPACPI_LED_NONE)? 0 : 1;
}
#define led_status(s) ((s) == 0 ? "off" : ((s) == 1 ? "on" : "blinking"))
@@ -1391,6 +1432,13 @@ static int led_write(char *buf)
IBM_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */
+static int beep_init(void)
+{
+ IBM_HANDLE_INIT(beep);
+
+ return (beep_handle)? 0 : 1;
+}
+
static int beep_read(char *p)
{
int len = 0;
@@ -1436,7 +1484,9 @@ static int thermal_init(void)
{
u8 t, ta1, ta2;
int i;
- int acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
+ int acpi_tmp7;
+
+ acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
if (ibm_thinkpad_ec_found && experimental) {
/*
@@ -1492,7 +1542,7 @@ static int thermal_init(void)
thermal_read_mode = TPACPI_THERMAL_NONE;
}
- return 0;
+ return (thermal_read_mode != TPACPI_THERMAL_NONE)? 0 : 1;
}
static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
@@ -1973,6 +2023,10 @@ static int fan_init(void)
fan_control_status_known = 1;
fan_watchdog_maxinterval = 0;
+ IBM_HANDLE_INIT(fans);
+ IBM_HANDLE_INIT(gfan);
+ IBM_HANDLE_INIT(sfan);
+
if (gfan_handle) {
/* 570, 600e/x, 770e, 770x */
fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
@@ -2010,7 +2064,7 @@ static int fan_init(void)
printk(IBM_ERR
"ThinkPad ACPI EC access misbehaving, "
"fan status and control unavailable\n");
- return 0;
+ return 1;
}
}
@@ -2041,7 +2095,9 @@ static int fan_init(void)
}
}
- return 0;
+ return (fan_status_access_mode != TPACPI_FAN_NONE ||
+ fan_control_access_mode != TPACPI_FAN_WR_NONE)?
+ 0 : 1;
}
static int fan_get_status(u8 *status)
@@ -2485,6 +2541,7 @@ static struct ibm_struct ibms[] = {
#ifdef CONFIG_THINKPAD_ACPI_DOCK
{
.name = "dock",
+ .init = dock_init,
.read = dock_read,
.write = dock_write,
.notify = dock_notify,
@@ -2512,6 +2569,7 @@ static struct ibm_struct ibms[] = {
#endif /* CONFIG_THINKPAD_ACPI_BAY */
{
.name = "cmos",
+ .init = cmos_init,
.read = cmos_read,
.write = cmos_write,
},
@@ -2523,6 +2581,7 @@ static struct ibm_struct ibms[] = {
},
{
.name = "beep",
+ .init = beep_init,
.read = beep_read,
.write = beep_write,
},
@@ -2571,20 +2630,33 @@ static int __init ibm_init(struct ibm_struct *ibm)
if (ibm->experimental && !experimental)
return 0;
- if (ibm->hid) {
- ret = register_tpacpi_subdriver(ibm);
- if (ret < 0)
- return ret;
- ibm->driver_registered = 1;
- }
-
if (ibm->init) {
ret = ibm->init();
- if (ret != 0)
+ if (ret > 0)
+ return 0; /* probe failed */
+ if (ret)
return ret;
ibm->init_called = 1;
}
+ if (ibm->hid) {
+ ret = register_tpacpi_subdriver(ibm);
+ if (ret)
+ goto err_out;
+ }
+
+ if (ibm->notify) {
+ ret = setup_notify(ibm);
+ if (ret == -ENODEV) {
+ printk(IBM_NOTICE "disabling subdriver %s\n",
+ ibm->name);
+ ret = 0;
+ goto err_out;
+ }
+ if (ret < 0)
+ goto err_out;
+ }
+
if (ibm->read) {
entry = create_proc_entry(ibm->name,
S_IFREG | S_IRUGO | S_IWUSR,
@@ -2592,7 +2664,8 @@ static int __init ibm_init(struct ibm_struct *ibm)
if (!entry) {
printk(IBM_ERR "unable to create proc entry %s\n",
ibm->name);
- return -ENODEV;
+ ret = -ENODEV;
+ goto err_out;
}
entry->owner = THIS_MODULE;
entry->data = ibm;
@@ -2602,36 +2675,36 @@ static int __init ibm_init(struct ibm_struct *ibm)
ibm->proc_created = 1;
}
- if (ibm->notify) {
- ret = setup_notify(ibm);
- if (ret == -ENODEV) {
- printk(IBM_NOTICE "disabling subdriver %s\n",
- ibm->name);
- ibm_exit(ibm);
- return 0;
- }
- if (ret < 0)
- return ret;
- }
-
return 0;
+
+err_out:
+ ibm_exit(ibm);
+ return (ret < 0)? ret : 0;
}
static void ibm_exit(struct ibm_struct *ibm)
{
- if (ibm->notify_installed)
+ if (ibm->notify_installed) {
acpi_remove_notify_handler(*ibm->handle, ibm->type,
dispatch_notify);
+ ibm->notify_installed = 0;
+ }
- if (ibm->proc_created)
+ if (ibm->proc_created) {
remove_proc_entry(ibm->name, proc_dir);
-
- if (ibm->init_called && ibm->exit)
- ibm->exit();
+ ibm->proc_created = 0;
+ }
if (ibm->driver_registered) {
acpi_bus_unregister_driver(ibm->driver);
kfree(ibm->driver);
+ ibm->driver = NULL;
+ ibm->driver_registered = 0;
+ }
+
+ if (ibm->init_called && ibm->exit) {
+ ibm->exit();
+ ibm->init_called = 0;
}
}
@@ -2663,6 +2736,32 @@ static char* __init check_dmi_for_ec(void)
return NULL;
}
+static int __init probe_for_thinkpad(void)
+{
+ int is_thinkpad;
+
+ if (acpi_disabled)
+ return -ENODEV;
+
+ /*
+ * Non-ancient models have better DMI tagging, but very old models
+ * don't.
+ */
+ is_thinkpad = dmi_name_in_vendors("ThinkPad");
+
+ /* ec is required because many other handles are relative to it */
+ IBM_HANDLE_INIT(ec);
+ if (!ec_handle) {
+ if (is_thinkpad)
+ printk(IBM_ERR
+ "Not yet supported ThinkPad detected!\n");
+ return -ENODEV;
+ }
+
+ return 0;
+}
+
+
/* Module init, exit, parameters */
static int __init set_ibm_param(const char *val, struct kernel_param *kp)
@@ -2712,45 +2811,13 @@ static int __init thinkpad_acpi_module_init(void)
{
int ret, i;
- if (acpi_disabled)
- return -ENODEV;
+ ret = probe_for_thinkpad();
+ if (ret)
+ return ret;
- /* ec is required because many other handles are relative to it */
- IBM_HANDLE_INIT(ec);
- if (!ec_handle) {
- printk(IBM_ERR "ec object not found\n");
- return -ENODEV;
- }
-
- /* Models with newer firmware report the EC in DMI */
ibm_thinkpad_ec_found = check_dmi_for_ec();
-
- /* these handles are not required */
- IBM_HANDLE_INIT(vid);
- IBM_HANDLE_INIT(vid2);
- IBM_HANDLE_INIT(ledb);
- IBM_HANDLE_INIT(led);
- IBM_HANDLE_INIT(hkey);
- IBM_HANDLE_INIT(lght);
- IBM_HANDLE_INIT(cmos);
-#ifdef CONFIG_THINKPAD_ACPI_DOCK
- IBM_HANDLE_INIT(dock);
-#endif
- IBM_HANDLE_INIT(pci);
-#ifdef CONFIG_THINKPAD_ACPI_BAY
- IBM_HANDLE_INIT(bay);
- if (bay_handle)
- IBM_HANDLE_INIT(bay_ej);
- IBM_HANDLE_INIT(bay2);
- if (bay2_handle)
- IBM_HANDLE_INIT(bay2_ej);
-#endif /* CONFIG_THINKPAD_ACPI_BAY */
- IBM_HANDLE_INIT(beep);
IBM_HANDLE_INIT(ecrd);
IBM_HANDLE_INIT(ecwr);
- IBM_HANDLE_INIT(fans);
- IBM_HANDLE_INIT(gfan);
- IBM_HANDLE_INIT(sfan);
proc_dir = proc_mkdir(IBM_DIR, acpi_root_dir);
if (!proc_dir) {
diff --git a/drivers/misc/thinkpad_acpi.h b/drivers/misc/thinkpad_acpi.h
index b2348d7..06d4c38 100644
--- a/drivers/misc/thinkpad_acpi.h
+++ b/drivers/misc/thinkpad_acpi.h
@@ -104,7 +104,7 @@ static acpi_handle ecrd_handle, ecwr_handle; /* 570 EC access */
static acpi_handle cmos_handle, hkey_handle; /* basic thinkpad handles */
static void ibm_handle_init(char *name,
- acpi_handle * handle, acpi_handle parent,
+ acpi_handle *handle, acpi_handle parent,
char **paths, int num_paths, char **path);
#define IBM_HANDLE_INIT(object) \
ibm_handle_init(#object, &object##_handle, *object##_parent, \
@@ -242,8 +242,8 @@ static int cmos_write(char *buf);
* Dock subdriver
*/
-static acpi_handle pci_handle;
#ifdef CONFIG_THINKPAD_ACPI_DOCK
+static acpi_handle pci_handle;
static acpi_handle dock_handle;
static void dock_notify(struct ibm_struct *ibm, u32 event);
--
1.5.1
-
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