ACPI: ibm-acpi: rename driver to thinkpad-acpi
Rename the ibm-acpi driver to thinkpad-acpi. ThinkPads are not even made
by IBM anymore, so it is high time to rename the driver...
The name thinkpad-acpi was used sometime ago by a thinkpad-specific hotkey
driver by Erik Rigtorp, around the 2.6.8-2.6.10 time frame. The driver
apparently never got merged into mainline (it did make some trips through
-mm). ibm-acpi was merged soon after, making its debut in 2.6.10.
The reuse of the thinkpad-acpi name shouldn't be a problem as far as user
confusion goes, as Erik's thinkpad-acpi apparently didn't get widespread
use in the Linux ThinkPad community and most hits for thinkpad-acpi in
google point to ibm-acpi anyway.
Erik, if you read this, please consider the reuse of the thinkpad-acpi name
as a compliment to your effort to make ThinkPads more useful to all of us.
Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Len Brown <len.brown@intel.com>
diff --git a/drivers/misc/thinkpad_acpi.c b/drivers/misc/thinkpad_acpi.c
new file mode 100644
index 0000000..2836516
--- /dev/null
+++ b/drivers/misc/thinkpad_acpi.c
@@ -0,0 +1,2783 @@
+/*
+ * ibm_acpi.c - IBM ThinkPad ACPI Extras
+ *
+ *
+ * Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net>
+ * Copyright (C) 2006-2007 Henrique de Moraes Holschuh <hmh@hmh.eng.br>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+#define IBM_VERSION "0.13"
+
+/*
+ * Changelog:
+ *
+ * 2006-11-22 0.13 new maintainer
+ * changelog now lives in git commit history, and will
+ * not be updated further in-file.
+ *
+ * 2005-08-17 0.12 fix compilation on 2.6.13-rc kernels
+ * 2005-03-17 0.11 support for 600e, 770x
+ * thanks to Jamie Lentin <lentinj@dial.pipex.com>
+ * support for 770e, G41
+ * G40 and G41 don't have a thinklight
+ * temperatures no longer experimental
+ * experimental brightness control
+ * experimental volume control
+ * experimental fan enable/disable
+ * 2005-01-16 0.10 fix module loading on R30, R31
+ * 2005-01-16 0.9 support for 570, R30, R31
+ * ultrabay support on A22p, A3x
+ * limit arg for cmos, led, beep, drop experimental status
+ * more capable led control on A21e, A22p, T20-22, X20
+ * experimental temperatures and fan speed
+ * experimental embedded controller register dump
+ * mark more functions as __init, drop incorrect __exit
+ * use MODULE_VERSION
+ * thanks to Henrik Brix Andersen <brix@gentoo.org>
+ * fix parameter passing on module loading
+ * thanks to Rusty Russell <rusty@rustcorp.com.au>
+ * thanks to Jim Radford <radford@blackbean.org>
+ * 2004-11-08 0.8 fix init error case, don't return from a macro
+ * thanks to Chris Wright <chrisw@osdl.org>
+ * 2004-10-23 0.7 fix module loading on A21e, A22p, T20, T21, X20
+ * fix led control on A21e
+ * 2004-10-19 0.6 use acpi_bus_register_driver() to claim HKEY device
+ * 2004-10-18 0.5 thinklight support on A21e, G40, R32, T20, T21, X20
+ * proc file format changed
+ * video_switch command
+ * experimental cmos control
+ * experimental led control
+ * experimental acpi sounds
+ * 2004-09-16 0.4 support for module parameters
+ * hotkey mask can be prefixed by 0x
+ * video output switching
+ * video expansion control
+ * ultrabay eject support
+ * removed lcd brightness/on/off control, didn't work
+ * 2004-08-17 0.3 support for R40
+ * lcd off, brightness control
+ * thinklight on/off
+ * 2004-08-14 0.2 support for T series, X20
+ * bluetooth enable/disable
+ * hotkey events disabled by default
+ * removed fan control, currently useless
+ * 2004-08-09 0.1 initial release, support for X series
+ */
+
+#include "thinkpad_acpi.h"
+
+MODULE_AUTHOR("Borislav Deianov, Henrique de Moraes Holschuh");
+MODULE_DESCRIPTION(IBM_DESC);
+MODULE_VERSION(IBM_VERSION);
+MODULE_LICENSE("GPL");
+
+#define __unused __attribute__ ((unused))
+
+/****************************************************************************
+ ****************************************************************************
+ *
+ * ACPI Helpers and device model
+ *
+ ****************************************************************************
+ ****************************************************************************/
+
+/*************************************************************************
+ * ACPI basic handles
+ */
+
+static acpi_handle root_handle = NULL;
+
+#define IBM_HANDLE(object, parent, paths...) \
+ static acpi_handle object##_handle; \
+ static acpi_handle *object##_parent = &parent##_handle; \
+ static char *object##_path; \
+ static char *object##_paths[] = { paths }
+
+IBM_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0", /* 240, 240x */
+ "\\_SB.PCI.ISA.EC", /* 570 */
+ "\\_SB.PCI0.ISA0.EC0", /* 600e/x, 770e, 770x */
+ "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
+ "\\_SB.PCI0.AD4S.EC0", /* i1400, R30 */
+ "\\_SB.PCI0.ICH3.EC0", /* R31 */
+ "\\_SB.PCI0.LPC.EC", /* all others */
+ );
+
+IBM_HANDLE(ecrd, ec, "ECRD"); /* 570 */
+IBM_HANDLE(ecwr, ec, "ECWR"); /* 570 */
+
+
+/*************************************************************************
+ * Misc ACPI handles
+ */
+
+IBM_HANDLE(cmos, root, "\\UCMS", /* R50, R50e, R50p, R51, T4x, X31, X40 */
+ "\\CMOS", /* A3x, G4x, R32, T23, T30, X22-24, X30 */
+ "\\CMS", /* R40, R40e */
+ ); /* all others */
+
+IBM_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */
+ "^HKEY", /* R30, R31 */
+ "HKEY", /* all others */
+ ); /* 570 */
+
+
+/*************************************************************************
+ * ACPI helpers
+ */
+
+static int acpi_evalf(acpi_handle handle,
+ void *res, char *method, char *fmt, ...)
+{
+ char *fmt0 = fmt;
+ struct acpi_object_list params;
+ union acpi_object in_objs[IBM_MAX_ACPI_ARGS];
+ struct acpi_buffer result, *resultp;
+ union acpi_object out_obj;
+ acpi_status status;
+ va_list ap;
+ char res_type;
+ int success;
+ int quiet;
+
+ if (!*fmt) {
+ printk(IBM_ERR "acpi_evalf() called with empty format\n");
+ return 0;
+ }
+
+ if (*fmt == 'q') {
+ quiet = 1;
+ fmt++;
+ } else
+ quiet = 0;
+
+ res_type = *(fmt++);
+
+ params.count = 0;
+ params.pointer = &in_objs[0];
+
+ va_start(ap, fmt);
+ while (*fmt) {
+ char c = *(fmt++);
+ switch (c) {
+ case 'd': /* int */
+ in_objs[params.count].integer.value = va_arg(ap, int);
+ in_objs[params.count++].type = ACPI_TYPE_INTEGER;
+ break;
+ /* add more types as needed */
+ default:
+ printk(IBM_ERR "acpi_evalf() called "
+ "with invalid format character '%c'\n", c);
+ return 0;
+ }
+ }
+ va_end(ap);
+
+ if (res_type != 'v') {
+ result.length = sizeof(out_obj);
+ result.pointer = &out_obj;
+ resultp = &result;
+ } else
+ resultp = NULL;
+
+ status = acpi_evaluate_object(handle, method, ¶ms, resultp);
+
+ switch (res_type) {
+ case 'd': /* int */
+ if (res)
+ *(int *)res = out_obj.integer.value;
+ success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
+ break;
+ case 'v': /* void */
+ success = status == AE_OK;
+ break;
+ /* add more types as needed */
+ default:
+ printk(IBM_ERR "acpi_evalf() called "
+ "with invalid format character '%c'\n", res_type);
+ return 0;
+ }
+
+ if (!success && !quiet)
+ printk(IBM_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
+ method, fmt0, status);
+
+ return success;
+}
+
+static void __unused acpi_print_int(acpi_handle handle, char *method)
+{
+ int i;
+
+ if (acpi_evalf(handle, &i, method, "d"))
+ printk(IBM_INFO "%s = 0x%x\n", method, i);
+ else
+ printk(IBM_ERR "error calling %s\n", method);
+}
+
+static int acpi_ec_read(int i, u8 * p)
+{
+ int v;
+
+ if (ecrd_handle) {
+ if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
+ return 0;
+ *p = v;
+ } else {
+ if (ec_read(i, p) < 0)
+ return 0;
+ }
+
+ return 1;
+}
+
+static int acpi_ec_write(int i, u8 v)
+{
+ if (ecwr_handle) {
+ if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
+ return 0;
+ } else {
+ if (ec_write(i, v) < 0)
+ return 0;
+ }
+
+ return 1;
+}
+
+static int _sta(acpi_handle handle)
+{
+ int status;
+
+ if (!handle || !acpi_evalf(handle, &status, "_STA", "d"))
+ status = 0;
+
+ return status;
+}
+
+/*************************************************************************
+ * ACPI device model
+ */
+
+static void __init ibm_handle_init(char *name,
+ acpi_handle * handle, acpi_handle parent,
+ char **paths, int num_paths, char **path)
+{
+ int i;
+ acpi_status status;
+
+ for (i = 0; i < num_paths; i++) {
+ status = acpi_get_handle(parent, paths[i], handle);
+ if (ACPI_SUCCESS(status)) {
+ *path = paths[i];
+ return;
+ }
+ }
+
+ *handle = NULL;
+}
+
+static void dispatch_notify(acpi_handle handle, u32 event, void *data)
+{
+ struct ibm_struct *ibm = data;
+
+ if (!ibm || !ibm->notify)
+ return;
+
+ ibm->notify(ibm, event);
+}
+
+static int __init setup_notify(struct ibm_struct *ibm)
+{
+ acpi_status status;
+ int ret;
+
+ if (!*ibm->handle)
+ return 0;
+
+ ret = acpi_bus_get_device(*ibm->handle, &ibm->device);
+ if (ret < 0) {
+ printk(IBM_ERR "%s device not present\n", ibm->name);
+ return -ENODEV;
+ }
+
+ acpi_driver_data(ibm->device) = ibm;
+ sprintf(acpi_device_class(ibm->device), "%s/%s", IBM_NAME, ibm->name);
+
+ status = acpi_install_notify_handler(*ibm->handle, ibm->type,
+ dispatch_notify, ibm);
+ if (ACPI_FAILURE(status)) {
+ if (status == AE_ALREADY_EXISTS) {
+ printk(IBM_NOTICE "another device driver is already handling %s events\n",
+ ibm->name);
+ } else {
+ printk(IBM_ERR "acpi_install_notify_handler(%s) failed: %d\n",
+ ibm->name, status);
+ }
+ return -ENODEV;
+ }
+ ibm->notify_installed = 1;
+ return 0;
+}
+
+static int __init ibm_device_add(struct acpi_device *device)
+{
+ return 0;
+}
+
+static int __init register_ibmacpi_subdriver(struct ibm_struct *ibm)
+{
+ int ret;
+
+ ibm->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
+ if (!ibm->driver) {
+ printk(IBM_ERR "kmalloc(ibm->driver) failed\n");
+ return -1;
+ }
+
+ sprintf(ibm->driver->name, "%s_%s", IBM_NAME, ibm->name);
+ ibm->driver->ids = ibm->hid;
+ ibm->driver->ops.add = &ibm_device_add;
+
+ ret = acpi_bus_register_driver(ibm->driver);
+ if (ret < 0) {
+ printk(IBM_ERR "acpi_bus_register_driver(%s) failed: %d\n",
+ ibm->hid, ret);
+ kfree(ibm->driver);
+ }
+
+ return ret;
+}
+
+
+/****************************************************************************
+ ****************************************************************************
+ *
+ * Procfs Helpers
+ *
+ ****************************************************************************
+ ****************************************************************************/
+
+static int dispatch_read(char *page, char **start, off_t off, int count,
+ int *eof, void *data)
+{
+ struct ibm_struct *ibm = data;
+ int len;
+
+ if (!ibm || !ibm->read)
+ return -EINVAL;
+
+ len = ibm->read(page);
+ if (len < 0)
+ return len;
+
+ if (len <= off + count)
+ *eof = 1;
+ *start = page + off;
+ len -= off;
+ if (len > count)
+ len = count;
+ if (len < 0)
+ len = 0;
+
+ return len;
+}
+
+static int dispatch_write(struct file *file, const char __user * userbuf,
+ unsigned long count, void *data)
+{
+ struct ibm_struct *ibm = data;
+ char *kernbuf;
+ int ret;
+
+ if (!ibm || !ibm->write)
+ return -EINVAL;
+
+ kernbuf = kmalloc(count + 2, GFP_KERNEL);
+ if (!kernbuf)
+ return -ENOMEM;
+
+ if (copy_from_user(kernbuf, userbuf, count)) {
+ kfree(kernbuf);
+ return -EFAULT;
+ }
+
+ kernbuf[count] = 0;
+ strcat(kernbuf, ",");
+ ret = ibm->write(kernbuf);
+ if (ret == 0)
+ ret = count;
+
+ kfree(kernbuf);
+
+ return ret;
+}
+
+static char *next_cmd(char **cmds)
+{
+ char *start = *cmds;
+ char *end;
+
+ while ((end = strchr(start, ',')) && end == start)
+ start = end + 1;
+
+ if (!end)
+ return NULL;
+
+ *end = 0;
+ *cmds = end + 1;
+ return start;
+}
+
+
+/****************************************************************************
+ ****************************************************************************
+ *
+ * Subdrivers
+ *
+ ****************************************************************************
+ ****************************************************************************/
+
+/*************************************************************************
+ * ibm-acpi init subdriver
+ */
+
+static int ibm_acpi_driver_init(void)
+{
+ printk(IBM_INFO "%s v%s\n", IBM_DESC, IBM_VERSION);
+ printk(IBM_INFO "%s\n", IBM_URL);
+
+ if (ibm_thinkpad_ec_found)
+ printk(IBM_INFO "ThinkPad EC firmware %s\n",
+ ibm_thinkpad_ec_found);
+
+ return 0;
+}
+
+static int ibm_acpi_driver_read(char *p)
+{
+ int len = 0;
+
+ len += sprintf(p + len, "driver:\t\t%s\n", IBM_DESC);
+ len += sprintf(p + len, "version:\t%s\n", IBM_VERSION);
+
+ return len;
+}
+
+/*************************************************************************
+ * Hotkey subdriver
+ */
+
+static int hotkey_supported;
+static int hotkey_mask_supported;
+static int hotkey_orig_status;
+static int hotkey_orig_mask;
+
+static int hotkey_init(void)
+{
+ /* hotkey not supported on 570 */
+ hotkey_supported = hkey_handle != NULL;
+
+ if (hotkey_supported) {
+ /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
+ A30, R30, R31, T20-22, X20-21, X22-24 */
+ hotkey_mask_supported =
+ acpi_evalf(hkey_handle, NULL, "DHKN", "qv");
+
+ if (!hotkey_get(&hotkey_orig_status, &hotkey_orig_mask))
+ return -ENODEV;
+ }
+
+ return 0;
+}
+
+static void hotkey_exit(void)
+{
+ if (hotkey_supported)
+ hotkey_set(hotkey_orig_status, hotkey_orig_mask);
+}
+
+static void hotkey_notify(struct ibm_struct *ibm, u32 event)
+{
+ int hkey;
+
+ if (acpi_evalf(hkey_handle, &hkey, "MHKP", "d"))
+ acpi_bus_generate_event(ibm->device, event, hkey);
+ else {
+ printk(IBM_ERR "unknown hotkey event %d\n", event);
+ acpi_bus_generate_event(ibm->device, event, 0);
+ }
+}
+
+static int hotkey_get(int *status, int *mask)
+{
+ if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
+ return 0;
+
+ if (hotkey_mask_supported)
+ if (!acpi_evalf(hkey_handle, mask, "DHKN", "d"))
+ return 0;
+
+ return 1;
+}
+
+static int hotkey_set(int status, int mask)
+{
+ int i;
+
+ if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", status))
+ return 0;
+
+ if (hotkey_mask_supported)
+ for (i = 0; i < 32; i++) {
+ int bit = ((1 << i) & mask) != 0;
+ if (!acpi_evalf(hkey_handle,
+ NULL, "MHKM", "vdd", i + 1, bit))
+ return 0;
+ }
+
+ return 1;
+}
+
+static int hotkey_read(char *p)
+{
+ int status, mask;
+ int len = 0;
+
+ if (!hotkey_supported) {
+ len += sprintf(p + len, "status:\t\tnot supported\n");
+ return len;
+ }
+
+ if (!hotkey_get(&status, &mask))
+ return -EIO;
+
+ len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
+ if (hotkey_mask_supported) {
+ len += sprintf(p + len, "mask:\t\t0x%04x\n", mask);
+ len += sprintf(p + len,
+ "commands:\tenable, disable, reset, <mask>\n");
+ } else {
+ len += sprintf(p + len, "mask:\t\tnot supported\n");
+ len += sprintf(p + len, "commands:\tenable, disable, reset\n");
+ }
+
+ return len;
+}
+
+static int hotkey_write(char *buf)
+{
+ int status, mask;
+ char *cmd;
+ int do_cmd = 0;
+
+ if (!hotkey_supported)
+ return -ENODEV;
+
+ if (!hotkey_get(&status, &mask))
+ return -EIO;
+
+ while ((cmd = next_cmd(&buf))) {
+ if (strlencmp(cmd, "enable") == 0) {
+ status = 1;
+ } else if (strlencmp(cmd, "disable") == 0) {
+ status = 0;
+ } else if (strlencmp(cmd, "reset") == 0) {
+ status = hotkey_orig_status;
+ mask = hotkey_orig_mask;
+ } else if (sscanf(cmd, "0x%x", &mask) == 1) {
+ /* mask set */
+ } else if (sscanf(cmd, "%x", &mask) == 1) {
+ /* mask set */
+ } else
+ return -EINVAL;
+ do_cmd = 1;
+ }
+
+ if (do_cmd && !hotkey_set(status, mask))
+ return -EIO;
+
+ return 0;
+}
+
+/*************************************************************************
+ * Bluetooth subdriver
+ */
+
+static int bluetooth_supported;
+
+static int bluetooth_init(void)
+{
+ /* 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;
+}
+
+static int bluetooth_status(void)
+{
+ int status;
+
+ if (!bluetooth_supported ||
+ !acpi_evalf(hkey_handle, &status, "GBDC", "d"))
+ status = 0;
+
+ return status;
+}
+
+static int bluetooth_read(char *p)
+{
+ int len = 0;
+ int status = bluetooth_status();
+
+ if (!bluetooth_supported)
+ len += sprintf(p + len, "status:\t\tnot supported\n");
+ else if (!(status & 1))
+ len += sprintf(p + len, "status:\t\tnot installed\n");
+ else {
+ len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 1));
+ len += sprintf(p + len, "commands:\tenable, disable\n");
+ }
+
+ return len;
+}
+
+static int bluetooth_write(char *buf)
+{
+ int status = bluetooth_status();
+ char *cmd;
+ int do_cmd = 0;
+
+ if (!bluetooth_supported)
+ return -ENODEV;
+
+ while ((cmd = next_cmd(&buf))) {
+ if (strlencmp(cmd, "enable") == 0) {
+ status |= 2;
+ } else if (strlencmp(cmd, "disable") == 0) {
+ status &= ~2;
+ } else
+ return -EINVAL;
+ do_cmd = 1;
+ }
+
+ if (do_cmd && !acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
+ return -EIO;
+
+ return 0;
+}
+
+/*************************************************************************
+ * Wan subdriver
+ */
+
+static int wan_supported;
+
+static int wan_init(void)
+{
+ wan_supported = hkey_handle &&
+ acpi_evalf(hkey_handle, NULL, "GWAN", "qv");
+
+ return 0;
+}
+
+static int wan_status(void)
+{
+ int status;
+
+ if (!wan_supported || !acpi_evalf(hkey_handle, &status, "GWAN", "d"))
+ status = 0;
+
+ return status;
+}
+
+static int wan_read(char *p)
+{
+ int len = 0;
+ int status = wan_status();
+
+ if (!wan_supported)
+ len += sprintf(p + len, "status:\t\tnot supported\n");
+ else if (!(status & 1))
+ len += sprintf(p + len, "status:\t\tnot installed\n");
+ else {
+ len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 1));
+ len += sprintf(p + len, "commands:\tenable, disable\n");
+ }
+
+ return len;
+}
+
+static int wan_write(char *buf)
+{
+ int status = wan_status();
+ char *cmd;
+ int do_cmd = 0;
+
+ if (!wan_supported)
+ return -ENODEV;
+
+ while ((cmd = next_cmd(&buf))) {
+ if (strlencmp(cmd, "enable") == 0) {
+ status |= 2;
+ } else if (strlencmp(cmd, "disable") == 0) {
+ status &= ~2;
+ } else
+ return -EINVAL;
+ do_cmd = 1;
+ }
+
+ if (do_cmd && !acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
+ return -EIO;
+
+ return 0;
+}
+
+/*************************************************************************
+ * Video subdriver
+ */
+
+static enum video_access_mode video_supported;
+static int video_orig_autosw;
+
+IBM_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA", /* 570 */
+ "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */
+ "\\_SB.PCI0.VID0", /* 770e */
+ "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */
+ "\\_SB.PCI0.AGP.VID", /* all others */
+ ); /* R30, R31 */
+
+IBM_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */
+
+static int video_init(void)
+{
+ int ivga;
+
+ if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
+ /* G41, assume IVGA doesn't change */
+ vid_handle = vid2_handle;
+
+ if (!vid_handle)
+ /* video switching not supported on R30, R31 */
+ video_supported = IBMACPI_VIDEO_NONE;
+ else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
+ /* 570 */
+ video_supported = IBMACPI_VIDEO_570;
+ else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
+ /* 600e/x, 770e, 770x */
+ video_supported = IBMACPI_VIDEO_770;
+ else
+ /* all others */
+ video_supported = IBMACPI_VIDEO_NEW;
+
+ return 0;
+}
+
+static void video_exit(void)
+{
+ acpi_evalf(vid_handle, NULL, "_DOS", "vd", video_orig_autosw);
+}
+
+static int video_status(void)
+{
+ int status = 0;
+ int i;
+
+ if (video_supported == IBMACPI_VIDEO_570) {
+ if (acpi_evalf(NULL, &i, "\\_SB.PHS", "dd", 0x87))
+ status = i & 3;
+ } else if (video_supported == IBMACPI_VIDEO_770) {
+ if (acpi_evalf(NULL, &i, "\\VCDL", "d"))
+ status |= 0x01 * i;
+ if (acpi_evalf(NULL, &i, "\\VCDC", "d"))
+ status |= 0x02 * i;
+ } else if (video_supported == IBMACPI_VIDEO_NEW) {
+ acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1);
+ if (acpi_evalf(NULL, &i, "\\VCDC", "d"))
+ status |= 0x02 * i;
+
+ acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0);
+ if (acpi_evalf(NULL, &i, "\\VCDL", "d"))
+ status |= 0x01 * i;
+ if (acpi_evalf(NULL, &i, "\\VCDD", "d"))
+ status |= 0x08 * i;
+ }
+
+ return status;
+}
+
+static int video_autosw(void)
+{
+ int autosw = 0;
+
+ if (video_supported == IBMACPI_VIDEO_570)
+ acpi_evalf(vid_handle, &autosw, "SWIT", "d");
+ else if (video_supported == IBMACPI_VIDEO_770 ||
+ video_supported == IBMACPI_VIDEO_NEW)
+ acpi_evalf(vid_handle, &autosw, "^VDEE", "d");
+
+ return autosw & 1;
+}
+
+static int video_switch(void)
+{
+ int autosw = video_autosw();
+ int ret;
+
+ if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", 1))
+ return -EIO;
+ ret = video_supported == IBMACPI_VIDEO_570 ?
+ acpi_evalf(ec_handle, NULL, "_Q16", "v") :
+ acpi_evalf(vid_handle, NULL, "VSWT", "v");
+ acpi_evalf(vid_handle, NULL, "_DOS", "vd", autosw);
+
+ return ret;
+}
+
+static int video_expand(void)
+{
+ if (video_supported == IBMACPI_VIDEO_570)
+ return acpi_evalf(ec_handle, NULL, "_Q17", "v");
+ else if (video_supported == IBMACPI_VIDEO_770)
+ return acpi_evalf(vid_handle, NULL, "VEXP", "v");
+ else
+ return acpi_evalf(NULL, NULL, "\\VEXP", "v");
+}
+
+static int video_switch2(int status)
+{
+ int ret;
+
+ if (video_supported == IBMACPI_VIDEO_570) {
+ ret = acpi_evalf(NULL, NULL,
+ "\\_SB.PHS2", "vdd", 0x8b, status | 0x80);
+ } else if (video_supported == IBMACPI_VIDEO_770) {
+ int autosw = video_autosw();
+ if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", 1))
+ return -EIO;
+
+ ret = acpi_evalf(vid_handle, NULL,
+ "ASWT", "vdd", status * 0x100, 0);
+
+ acpi_evalf(vid_handle, NULL, "_DOS", "vd", autosw);
+ } else {
+ ret = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
+ acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
+ }
+
+ return ret;
+}
+
+static int video_read(char *p)
+{
+ int status = video_status();
+ int autosw = video_autosw();
+ int len = 0;
+
+ if (!video_supported) {
+ len += sprintf(p + len, "status:\t\tnot supported\n");
+ return len;
+ }
+
+ len += sprintf(p + len, "status:\t\tsupported\n");
+ len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
+ len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
+ if (video_supported == IBMACPI_VIDEO_NEW)
+ len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
+ len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
+ len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
+ len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
+ if (video_supported == IBMACPI_VIDEO_NEW)
+ len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
+ len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
+ len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
+
+ return len;
+}
+
+static int video_write(char *buf)
+{
+ char *cmd;
+ int enable, disable, status;
+
+ if (!video_supported)
+ return -ENODEV;
+
+ enable = disable = 0;
+
+ while ((cmd = next_cmd(&buf))) {
+ if (strlencmp(cmd, "lcd_enable") == 0) {
+ enable |= 0x01;
+ } else if (strlencmp(cmd, "lcd_disable") == 0) {
+ disable |= 0x01;
+ } else if (strlencmp(cmd, "crt_enable") == 0) {
+ enable |= 0x02;
+ } else if (strlencmp(cmd, "crt_disable") == 0) {
+ disable |= 0x02;
+ } else if (video_supported == IBMACPI_VIDEO_NEW &&
+ strlencmp(cmd, "dvi_enable") == 0) {
+ enable |= 0x08;
+ } else if (video_supported == IBMACPI_VIDEO_NEW &&
+ strlencmp(cmd, "dvi_disable") == 0) {
+ disable |= 0x08;
+ } else if (strlencmp(cmd, "auto_enable") == 0) {
+ if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", 1))
+ return -EIO;
+ } else if (strlencmp(cmd, "auto_disable") == 0) {
+ if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", 0))
+ return -EIO;
+ } else if (strlencmp(cmd, "video_switch") == 0) {
+ if (!video_switch())
+ return -EIO;
+ } else if (strlencmp(cmd, "expand_toggle") == 0) {
+ if (!video_expand())
+ return -EIO;
+ } else
+ return -EINVAL;
+ }
+
+ if (enable || disable) {
+ status = (video_status() & 0x0f & ~disable) | enable;
+ if (!video_switch2(status))
+ return -EIO;
+ }
+
+ return 0;
+}
+
+/*************************************************************************
+ * Light (thinklight) subdriver
+ */
+
+static int light_supported;
+static int light_status_supported;
+
+IBM_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */
+IBM_HANDLE(ledb, ec, "LEDB"); /* G4x */
+
+static int light_init(void)
+{
+ /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
+ light_supported = (cmos_handle || lght_handle) && !ledb_handle;
+
+ if (light_supported)
+ /* light status not supported on
+ 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
+ light_status_supported = acpi_evalf(ec_handle, NULL,
+ "KBLT", "qv");
+
+ return 0;
+}
+
+static int light_read(char *p)
+{
+ int len = 0;
+ int status = 0;
+
+ if (!light_supported) {
+ len += sprintf(p + len, "status:\t\tnot supported\n");
+ } else if (!light_status_supported) {
+ len += sprintf(p + len, "status:\t\tunknown\n");
+ len += sprintf(p + len, "commands:\ton, off\n");
+ } else {
+ if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
+ return -EIO;
+ len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
+ len += sprintf(p + len, "commands:\ton, off\n");
+ }
+
+ return len;
+}
+
+static int light_write(char *buf)
+{
+ int cmos_cmd, lght_cmd;
+ char *cmd;
+ int success;
+
+ if (!light_supported)
+ return -ENODEV;
+
+ while ((cmd = next_cmd(&buf))) {
+ if (strlencmp(cmd, "on") == 0) {
+ cmos_cmd = 0x0c;
+ lght_cmd = 1;
+ } else if (strlencmp(cmd, "off") == 0) {
+ cmos_cmd = 0x0d;
+ lght_cmd = 0;
+ } else
+ return -EINVAL;
+
+ success = cmos_handle ?
+ acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd) :
+ acpi_evalf(lght_handle, NULL, NULL, "vd", lght_cmd);
+ if (!success)
+ return -EIO;
+ }
+
+ return 0;
+}
+
+/*************************************************************************
+ * 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_ACPI_IBM_DOCK
+
+IBM_HANDLE(dock, root, "\\_SB.GDCK", /* X30, X31, X40 */
+ "\\_SB.PCI0.DOCK", /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
+ "\\_SB.PCI0.PCI1.DOCK", /* all others */
+ "\\_SB.PCI.ISA.SLCE", /* 570 */
+ ); /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
+
+#define dock_docked() (_sta(dock_handle) & 1)
+
+static void dock_notify(struct ibm_struct *ibm, u32 event)
+{
+ int docked = dock_docked();
+ int pci = ibm->hid && strstr(ibm->hid, IBM_PCI_HID);
+
+ if (event == 1 && !pci) /* 570 */
+ acpi_bus_generate_event(ibm->device, event, 1); /* button */
+ else if (event == 1 && pci) /* 570 */
+ acpi_bus_generate_event(ibm->device, event, 3); /* dock */
+ else if (event == 3 && docked)
+ acpi_bus_generate_event(ibm->device, event, 1); /* button */
+ else if (event == 3 && !docked)
+ acpi_bus_generate_event(ibm->device, event, 2); /* undock */
+ else if (event == 0 && docked)
+ acpi_bus_generate_event(ibm->device, event, 3); /* dock */
+ else {
+ printk(IBM_ERR "unknown dock event %d, status %d\n",
+ event, _sta(dock_handle));
+ acpi_bus_generate_event(ibm->device, event, 0); /* unknown */
+ }
+}
+
+static int dock_read(char *p)
+{
+ int len = 0;
+ int docked = dock_docked();
+
+ if (!dock_handle)
+ len += sprintf(p + len, "status:\t\tnot supported\n");
+ else if (!docked)
+ len += sprintf(p + len, "status:\t\tundocked\n");
+ else {
+ len += sprintf(p + len, "status:\t\tdocked\n");
+ len += sprintf(p + len, "commands:\tdock, undock\n");
+ }
+
+ return len;
+}
+
+static int dock_write(char *buf)
+{
+ char *cmd;
+
+ if (!dock_docked())
+ return -ENODEV;
+
+ while ((cmd = next_cmd(&buf))) {
+ if (strlencmp(cmd, "undock") == 0) {
+ if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
+ !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
+ return -EIO;
+ } else if (strlencmp(cmd, "dock") == 0) {
+ if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
+ return -EIO;
+ } else
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+#endif /* CONFIG_ACPI_IBM_DOCK */
+
+/*************************************************************************
+ * Bay subdriver
+ */
+
+#ifdef CONFIG_ACPI_IBM_BAY
+static int bay_status_supported;
+static int bay_status2_supported;
+static int bay_eject_supported;
+static int bay_eject2_supported;
+
+IBM_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST", /* 570 */
+ "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
+ "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
+ "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
+ ); /* A21e, R30, R31 */
+IBM_HANDLE(bay_ej, bay, "_EJ3", /* 600e/x, A2xm/p, A3x */
+ "_EJ0", /* all others */
+ ); /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
+IBM_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV", /* A3x, R32 */
+ "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
+ ); /* all others */
+IBM_HANDLE(bay2_ej, bay2, "_EJ3", /* 600e/x, 770e, A3x */
+ "_EJ0", /* 770x */
+ ); /* all others */
+
+static int bay_init(void)
+{
+ bay_status_supported = bay_handle &&
+ acpi_evalf(bay_handle, NULL, "_STA", "qv");
+ bay_status2_supported = bay2_handle &&
+ acpi_evalf(bay2_handle, NULL, "_STA", "qv");
+
+ bay_eject_supported = bay_handle && bay_ej_handle &&
+ (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
+ bay_eject2_supported = bay2_handle && bay2_ej_handle &&
+ (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
+
+ return 0;
+}
+
+static void bay_notify(struct ibm_struct *ibm, u32 event)
+{
+ acpi_bus_generate_event(ibm->device, event, 0);
+}
+
+#define bay_occupied(b) (_sta(b##_handle) & 1)
+
+static int bay_read(char *p)
+{
+ int len = 0;
+ int occupied = bay_occupied(bay);
+ int occupied2 = bay_occupied(bay2);
+ int eject, eject2;
+
+ len += sprintf(p + len, "status:\t\t%s\n", bay_status_supported ?
+ (occupied ? "occupied" : "unoccupied") :
+ "not supported");
+ if (bay_status2_supported)
+ len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
+ "occupied" : "unoccupied");
+
+ eject = bay_eject_supported && occupied;
+ eject2 = bay_eject2_supported && occupied2;
+
+ if (eject && eject2)
+ len += sprintf(p + len, "commands:\teject, eject2\n");
+ else if (eject)
+ len += sprintf(p + len, "commands:\teject\n");
+ else if (eject2)
+ len += sprintf(p + len, "commands:\teject2\n");
+
+ return len;
+}
+
+static int bay_write(char *buf)
+{
+ char *cmd;
+
+ if (!bay_eject_supported && !bay_eject2_supported)
+ return -ENODEV;
+
+ while ((cmd = next_cmd(&buf))) {
+ if (bay_eject_supported && strlencmp(cmd, "eject") == 0) {
+ if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
+ return -EIO;
+ } else if (bay_eject2_supported &&
+ strlencmp(cmd, "eject2") == 0) {
+ if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
+ return -EIO;
+ } else
+ return -EINVAL;
+ }
+
+ return 0;
+}
+#endif /* CONFIG_ACPI_IBM_BAY */
+
+/*************************************************************************
+ * CMOS subdriver
+ */
+
+static int cmos_eval(int cmos_cmd)
+{
+ if (cmos_handle)
+ return acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd);
+ else
+ return 1;
+}
+
+static int cmos_read(char *p)
+{
+ int len = 0;
+
+ /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
+ R30, R31, T20-22, X20-21 */
+ if (!cmos_handle)
+ len += sprintf(p + len, "status:\t\tnot supported\n");
+ else {
+ len += sprintf(p + len, "status:\t\tsupported\n");
+ len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
+ }
+
+ return len;
+}
+
+static int cmos_write(char *buf)
+{
+ char *cmd;
+ int cmos_cmd;
+
+ if (!cmos_handle)
+ return -EINVAL;
+
+ while ((cmd = next_cmd(&buf))) {
+ if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
+ cmos_cmd >= 0 && cmos_cmd <= 21) {
+ /* cmos_cmd set */
+ } else
+ return -EINVAL;
+
+ if (!cmos_eval(cmos_cmd))
+ return -EIO;
+ }
+
+ return 0;
+}
+
+
+/*************************************************************************
+ * LED subdriver
+ */
+
+static enum led_access_mode led_supported;
+
+IBM_HANDLE(led, ec, "SLED", /* 570 */
+ "SYSL", /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
+ "LED", /* all others */
+ ); /* R30, R31 */
+
+static int led_init(void)
+{
+ if (!led_handle)
+ /* led not supported on R30, R31 */
+ led_supported = IBMACPI_LED_NONE;
+ else if (strlencmp(led_path, "SLED") == 0)
+ /* 570 */
+ led_supported = IBMACPI_LED_570;
+ else if (strlencmp(led_path, "SYSL") == 0)
+ /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
+ led_supported = IBMACPI_LED_OLD;
+ else
+ /* all others */
+ led_supported = IBMACPI_LED_NEW;
+
+ return 0;
+}
+
+#define led_status(s) ((s) == 0 ? "off" : ((s) == 1 ? "on" : "blinking"))
+
+static int led_read(char *p)
+{
+ int len = 0;
+
+ if (!led_supported) {
+ len += sprintf(p + len, "status:\t\tnot supported\n");
+ return len;
+ }
+ len += sprintf(p + len, "status:\t\tsupported\n");
+
+ if (led_supported == IBMACPI_LED_570) {
+ /* 570 */
+ int i, status;
+ for (i = 0; i < 8; i++) {
+ if (!acpi_evalf(ec_handle,
+ &status, "GLED", "dd", 1 << i))
+ return -EIO;
+ len += sprintf(p + len, "%d:\t\t%s\n",
+ i, led_status(status));
+ }
+ }
+
+ len += sprintf(p + len, "commands:\t"
+ "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
+
+ return len;
+}
+
+/* off, on, blink */
+static const int led_sled_arg1[] = { 0, 1, 3 };
+static const int led_exp_hlbl[] = { 0, 0, 1 }; /* led# * */
+static const int led_exp_hlcl[] = { 0, 1, 1 }; /* led# * */
+static const int led_led_arg1[] = { 0, 0x80, 0xc0 };
+
+static int led_write(char *buf)
+{
+ char *cmd;
+ int led, ind, ret;
+
+ if (!led_supported)
+ return -ENODEV;
+
+ while ((cmd = next_cmd(&buf))) {
+ if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
+ return -EINVAL;
+
+ if (strstr(cmd, "off")) {
+ ind = 0;
+ } else if (strstr(cmd, "on")) {
+ ind = 1;
+ } else if (strstr(cmd, "blink")) {
+ ind = 2;
+ } else
+ return -EINVAL;
+
+ if (led_supported == IBMACPI_LED_570) {
+ /* 570 */
+ led = 1 << led;
+ if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
+ led, led_sled_arg1[ind]))
+ return -EIO;
+ } else if (led_supported == IBMACPI_LED_OLD) {
+ /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
+ led = 1 << led;
+ ret = ec_write(IBMACPI_LED_EC_HLMS, led);
+ if (ret >= 0)
+ ret =
+ ec_write(IBMACPI_LED_EC_HLBL,
+ led * led_exp_hlbl[ind]);
+ if (ret >= 0)
+ ret =
+ ec_write(IBMACPI_LED_EC_HLCL,
+ led * led_exp_hlcl[ind]);
+ if (ret < 0)
+ return ret;
+ } else {
+ /* all others */
+ if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
+ led, led_led_arg1[ind]))
+ return -EIO;
+ }
+ }
+
+ return 0;
+}
+
+/*************************************************************************
+ * Beep subdriver
+ */
+
+IBM_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */
+
+static int beep_read(char *p)
+{
+ int len = 0;
+
+ if (!beep_handle)
+ len += sprintf(p + len, "status:\t\tnot supported\n");
+ else {
+ len += sprintf(p + len, "status:\t\tsupported\n");
+ len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
+ }
+
+ return len;
+}
+
+static int beep_write(char *buf)
+{
+ char *cmd;
+ int beep_cmd;
+
+ if (!beep_handle)
+ return -ENODEV;
+
+ while ((cmd = next_cmd(&buf))) {
+ if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
+ beep_cmd >= 0 && beep_cmd <= 17) {
+ /* beep_cmd set */
+ } else
+ return -EINVAL;
+ if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
+ return -EIO;
+ }
+
+ return 0;
+}
+
+/*************************************************************************
+ * Thermal subdriver
+ */
+
+static enum thermal_access_mode thermal_read_mode;
+
+static int thermal_init(void)
+{
+ u8 t, ta1, ta2;
+ int i;
+ int acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
+
+ if (ibm_thinkpad_ec_found && experimental) {
+ /*
+ * Direct EC access mode: sensors at registers
+ * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for
+ * non-implemented, thermal sensors return 0x80 when
+ * not available
+ */
+
+ ta1 = ta2 = 0;
+ for (i = 0; i < 8; i++) {
+ if (likely(acpi_ec_read(0x78 + i, &t))) {
+ ta1 |= t;
+ } else {
+ ta1 = 0;
+ break;
+ }
+ if (likely(acpi_ec_read(0xC0 + i, &t))) {
+ ta2 |= t;
+ } else {
+ ta1 = 0;
+ break;
+ }
+ }
+ if (ta1 == 0) {
+ /* This is sheer paranoia, but we handle it anyway */
+ if (acpi_tmp7) {
+ printk(IBM_ERR
+ "ThinkPad ACPI EC access misbehaving, "
+ "falling back to ACPI TMPx access mode\n");
+ thermal_read_mode = IBMACPI_THERMAL_ACPI_TMP07;
+ } else {
+ printk(IBM_ERR
+ "ThinkPad ACPI EC access misbehaving, "
+ "disabling thermal sensors access\n");
+ thermal_read_mode = IBMACPI_THERMAL_NONE;
+ }
+ } else {
+ thermal_read_mode =
+ (ta2 != 0) ?
+ IBMACPI_THERMAL_TPEC_16 : IBMACPI_THERMAL_TPEC_8;
+ }
+ } else if (acpi_tmp7) {
+ if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
+ /* 600e/x, 770e, 770x */
+ thermal_read_mode = IBMACPI_THERMAL_ACPI_UPDT;
+ } else {
+ /* Standard ACPI TMPx access, max 8 sensors */
+ thermal_read_mode = IBMACPI_THERMAL_ACPI_TMP07;
+ }
+ } else {
+ /* temperatures not supported on 570, G4x, R30, R31, R32 */
+ thermal_read_mode = IBMACPI_THERMAL_NONE;
+ }
+
+ return 0;
+}
+
+static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
+{
+ int i, t;
+ s8 tmp;
+ char tmpi[] = "TMPi";
+
+ if (!s)
+ return -EINVAL;
+
+ switch (thermal_read_mode) {
+#if IBMACPI_MAX_THERMAL_SENSORS >= 16
+ case IBMACPI_THERMAL_TPEC_16:
+ for (i = 0; i < 8; i++) {
+ if (!acpi_ec_read(0xC0 + i, &tmp))
+ return -EIO;
+ s->temp[i + 8] = tmp * 1000;
+ }
+ /* fallthrough */
+#endif
+ case IBMACPI_THERMAL_TPEC_8:
+ for (i = 0; i < 8; i++) {
+ if (!acpi_ec_read(0x78 + i, &tmp))
+ return -EIO;
+ s->temp[i] = tmp * 1000;
+ }
+ return (thermal_read_mode == IBMACPI_THERMAL_TPEC_16) ? 16 : 8;
+
+ case IBMACPI_THERMAL_ACPI_UPDT:
+ if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
+ return -EIO;
+ for (i = 0; i < 8; i++) {
+ tmpi[3] = '0' + i;
+ if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
+ return -EIO;
+ s->temp[i] = (t - 2732) * 100;
+ }
+ return 8;
+
+ case IBMACPI_THERMAL_ACPI_TMP07:
+ for (i = 0; i < 8; i++) {
+ tmpi[3] = '0' + i;
+ if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
+ return -EIO;
+ s->temp[i] = t * 1000;
+ }
+ return 8;
+
+ case IBMACPI_THERMAL_NONE:
+ default:
+ return 0;
+ }
+}
+
+static int thermal_read(char *p)
+{
+ int len = 0;
+ int n, i;
+ struct ibm_thermal_sensors_struct t;
+
+ n = thermal_get_sensors(&t);
+ if (unlikely(n < 0))
+ return n;
+
+ len += sprintf(p + len, "temperatures:\t");
+
+ if (n > 0) {
+ for (i = 0; i < (n - 1); i++)
+ len += sprintf(p + len, "%d ", t.temp[i] / 1000);
+ len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
+ } else
+ len += sprintf(p + len, "not supported\n");
+
+ return len;
+}
+
+/*************************************************************************
+ * EC Dump subdriver
+ */
+
+static u8 ecdump_regs[256];
+
+static int ecdump_read(char *p)
+{
+ int len = 0;
+ int i, j;
+ u8 v;
+
+ len += sprintf(p + len, "EC "
+ " +00 +01 +02 +03 +04 +05 +06 +07"
+ " +08 +09 +0a +0b +0c +0d +0e +0f\n");
+ for (i = 0; i < 256; i += 16) {
+ len += sprintf(p + len, "EC 0x%02x:", i);
+ for (j = 0; j < 16; j++) {
+ if (!acpi_ec_read(i + j, &v))
+ break;
+ if (v != ecdump_regs[i + j])
+ len += sprintf(p + len, " *%02x", v);
+ else
+ len += sprintf(p + len, " %02x", v);
+ ecdump_regs[i + j] = v;
+ }
+ len += sprintf(p + len, "\n");
+ if (j != 16)
+ break;
+ }
+
+ /* These are way too dangerous to advertise openly... */
+#if 0
+ len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
+ " (<offset> is 00-ff, <value> is 00-ff)\n");
+ len += sprintf(p + len, "commands:\t0x<offset> <value> "
+ " (<offset> is 00-ff, <value> is 0-255)\n");
+#endif
+ return len;
+}
+
+static int ecdump_write(char *buf)
+{
+ char *cmd;
+ int i, v;
+
+ while ((cmd = next_cmd(&buf))) {
+ if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
+ /* i and v set */
+ } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
+ /* i and v set */
+ } else
+ return -EINVAL;
+ if (i >= 0 && i < 256 && v >= 0 && v < 256) {
+ if (!acpi_ec_write(i, v))
+ return -EIO;
+ } else
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+/*************************************************************************
+ * Backlight/brightness subdriver
+ */
+
+static struct backlight_device *ibm_backlight_device = NULL;
+
+static struct backlight_ops ibm_backlight_data = {
+ .get_brightness = brightness_get,
+ .update_status = brightness_update_status,
+};
+
+static int brightness_init(void)
+{
+ int b;
+
+ b = brightness_get(NULL);
+ if (b < 0)
+ return b;
+
+ ibm_backlight_device = backlight_device_register("ibm", NULL, NULL,
+ &ibm_backlight_data);
+ if (IS_ERR(ibm_backlight_device)) {
+ printk(IBM_ERR "Could not register backlight device\n");
+ return PTR_ERR(ibm_backlight_device);
+ }
+
+ ibm_backlight_device->props.max_brightness = 7;
+ ibm_backlight_device->props.brightness = b;
+ backlight_update_status(ibm_backlight_device);
+
+ return 0;
+}
+
+static void brightness_exit(void)
+{
+ if (ibm_backlight_device) {
+ backlight_device_unregister(ibm_backlight_device);
+ ibm_backlight_device = NULL;
+ }
+}
+
+static int brightness_update_status(struct backlight_device *bd)
+{
+ return brightness_set(
+ (bd->props.fb_blank == FB_BLANK_UNBLANK &&
+ bd->props.power == FB_BLANK_UNBLANK) ?
+ bd->props.brightness : 0);
+}
+
+static int brightness_get(struct backlight_device *bd)
+{
+ u8 level;
+ if (!acpi_ec_read(brightness_offset, &level))
+ return -EIO;
+
+ level &= 0x7;
+
+ return level;
+}
+
+static int brightness_set(int value)
+{
+ int cmos_cmd, inc, i;
+ int current_value = brightness_get(NULL);
+
+ value &= 7;
+
+ cmos_cmd = value > current_value ? TP_CMOS_BRIGHTNESS_UP : TP_CMOS_BRIGHTNESS_DOWN;
+ inc = value > current_value ? 1 : -1;
+ for (i = current_value; i != value; i += inc) {
+ if (!cmos_eval(cmos_cmd))
+ return -EIO;
+ if (!acpi_ec_write(brightness_offset, i + inc))
+ return -EIO;
+ }
+
+ return 0;
+}
+
+static int brightness_read(char *p)
+{
+ int len = 0;
+ int level;
+
+ if ((level = brightness_get(NULL)) < 0) {
+ len += sprintf(p + len, "level:\t\tunreadable\n");
+ } else {
+ len += sprintf(p + len, "level:\t\t%d\n", level & 0x7);
+ len += sprintf(p + len, "commands:\tup, down\n");
+ len += sprintf(p + len, "commands:\tlevel <level>"
+ " (<level> is 0-7)\n");
+ }
+
+ return len;
+}
+
+static int brightness_write(char *buf)
+{
+ int level;
+ int new_level;
+ char *cmd;
+
+ while ((cmd = next_cmd(&buf))) {
+ if ((level = brightness_get(NULL)) < 0)
+ return level;
+ level &= 7;
+
+ if (strlencmp(cmd, "up") == 0) {
+ new_level = level == 7 ? 7 : level + 1;
+ } else if (strlencmp(cmd, "down") == 0) {
+ new_level = level == 0 ? 0 : level - 1;
+ } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
+ new_level >= 0 && new_level <= 7) {
+ /* new_level set */
+ } else
+ return -EINVAL;
+
+ brightness_set(new_level);
+ }
+
+ return 0;
+}
+
+/*************************************************************************
+ * Volume subdriver
+ */
+
+static int volume_read(char *p)
+{
+ int len = 0;
+ u8 level;
+
+ if (!acpi_ec_read(volume_offset, &level)) {
+ len += sprintf(p + len, "level:\t\tunreadable\n");
+ } else {
+ len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
+ len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
+ len += sprintf(p + len, "commands:\tup, down, mute\n");
+ len += sprintf(p + len, "commands:\tlevel <level>"
+ " (<level> is 0-15)\n");
+ }
+
+ return len;
+}
+
+static int volume_write(char *buf)
+{
+ int cmos_cmd, inc, i;
+ u8 level, mute;
+ int new_level, new_mute;
+ char *cmd;
+
+ while ((cmd = next_cmd(&buf))) {
+ if (!acpi_ec_read(volume_offset, &level))
+ return -EIO;
+ new_mute = mute = level & 0x40;
+ new_level = level = level & 0xf;
+
+ if (strlencmp(cmd, "up") == 0) {
+ if (mute)
+ new_mute = 0;
+ else
+ new_level = level == 15 ? 15 : level + 1;
+ } else if (strlencmp(cmd, "down") == 0) {
+ if (mute)
+ new_mute = 0;
+ else
+ new_level = level == 0 ? 0 : level - 1;
+ } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
+ new_level >= 0 && new_level <= 15) {
+ /* new_level set */
+ } else if (strlencmp(cmd, "mute") == 0) {
+ new_mute = 0x40;
+ } else
+ return -EINVAL;
+
+ if (new_level != level) { /* mute doesn't change */
+ cmos_cmd = new_level > level ? TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
+ inc = new_level > level ? 1 : -1;
+
+ if (mute && (!cmos_eval(cmos_cmd) ||
+ !acpi_ec_write(volume_offset, level)))
+ return -EIO;
+
+ for (i = level; i != new_level; i += inc)
+ if (!cmos_eval(cmos_cmd) ||
+ !acpi_ec_write(volume_offset, i + inc))
+ return -EIO;
+
+ if (mute && (!cmos_eval(TP_CMOS_VOLUME_MUTE) ||
+ !acpi_ec_write(volume_offset,
+ new_level + mute)))
+ return -EIO;
+ }
+
+ if (new_mute != mute) { /* level doesn't change */
+ cmos_cmd = new_mute ? TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
+
+ if (!cmos_eval(cmos_cmd) ||
+ !acpi_ec_write(volume_offset, level + new_mute))
+ return -EIO;
+ }
+ }
+
+ return 0;
+}
+
+
+/*************************************************************************
+ * Fan subdriver
+ */
+
+/*
+ * FAN ACCESS MODES
+ *
+ * IBMACPI_FAN_RD_ACPI_GFAN:
+ * ACPI GFAN method: returns fan level
+ *
+ * see IBMACPI_FAN_WR_ACPI_SFAN
+ * EC 0x2f not available if GFAN exists
+ *
+ * IBMACPI_FAN_WR_ACPI_SFAN:
+ * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
+ *
+ * EC 0x2f might be available *for reading*, but never for writing.
+ *
+ * IBMACPI_FAN_WR_TPEC:
+ * ThinkPad EC register 0x2f (HFSP): fan control loop mode Supported
+ * on almost all ThinkPads
+ *
+ * Fan speed changes of any sort (including those caused by the
+ * disengaged mode) are usually done slowly by the firmware as the
+ * maximum ammount of fan duty cycle change per second seems to be
+ * limited.
+ *
+ * Reading is not available if GFAN exists.
+ * Writing is not available if SFAN exists.
+ *
+ * Bits
+ * 7 automatic mode engaged;
+ * (default operation mode of the ThinkPad)
+ * fan level is ignored in this mode.
+ * 6 disengage mode (takes precedence over bit 7);
+ * not available on all thinkpads. May disable
+ * the tachometer, and speeds up fan to 100% duty-cycle,
+ * which speeds it up far above the standard RPM
+ * levels. It is not impossible that it could cause
+ * hardware damage.
+ * 5-3 unused in some models. Extra bits for fan level
+ * in others, but still useless as all values above
+ * 7 map to the same speed as level 7 in these models.
+ * 2-0 fan level (0..7 usually)
+ * 0x00 = stop
+ * 0x07 = max (set when temperatures critical)
+ * Some ThinkPads may have other levels, see
+ * IBMACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
+ *
+ * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
+ * boot. Apparently the EC does not intialize it, so unless ACPI DSDT
+ * does so, its initial value is meaningless (0x07).
+ *
+ * For firmware bugs, refer to:
+ * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
+ *
+ * ----
+ *
+ * ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
+ * Main fan tachometer reading (in RPM)
+ *
+ * This register is present on all ThinkPads with a new-style EC, and
+ * it is known not to be present on the A21m/e, and T22, as there is
+ * something else in offset 0x84 according to the ACPI DSDT. Other
+ * ThinkPads from this same time period (and earlier) probably lack the
+ * tachometer as well.
+ *
+ * Unfortunately a lot of ThinkPads with new-style ECs but whose firwmare
+ * was never fixed by IBM to report the EC firmware version string
+ * probably support the tachometer (like the early X models), so
+ * detecting it is quite hard. We need more data to know for sure.
+ *
+ * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
+ * might result.
+ *
+ * FIRMWARE BUG: when EC 0x2f bit 6 is set (disengaged mode), this
+ * register is not invalidated in ThinkPads that disable tachometer
+ * readings. Thus, the tachometer readings go stale.
+ *
+ * For firmware bugs, refer to:
+ * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
+ *
+ * IBMACPI_FAN_WR_ACPI_FANS:
+ * ThinkPad X31, X40, X41. Not available in the X60.
+ *
+ * FANS ACPI handle: takes three arguments: low speed, medium speed,
+ * high speed. ACPI DSDT seems to map these three speeds to levels
+ * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
+ * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
+ *
+ * The speeds are stored on handles
+ * (FANA:FAN9), (FANC:FANB), (FANE:FAND).
+ *
+ * There are three default speed sets, acessible as handles:
+ * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
+ *
+ * ACPI DSDT switches which set is in use depending on various
+ * factors.
+ *
+ * IBMACPI_FAN_WR_TPEC is also available and should be used to
+ * command the fan. The X31/X40/X41 seems to have 8 fan levels,
+ * but the ACPI tables just mention level 7.
+ */
+
+static enum fan_status_access_mode fan_status_access_mode;
+static enum fan_control_access_mode fan_control_access_mode;
+static enum fan_control_commands fan_control_commands;
+
+static int fan_control_status_known;
+static u8 fan_control_initial_status;
+
+static void fan_watchdog_fire(struct work_struct *ignored);
+static int fan_watchdog_maxinterval;
+static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
+
+IBM_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */
+IBM_HANDLE(gfan, ec, "GFAN", /* 570 */
+ "\\FSPD", /* 600e/x, 770e, 770x */
+ ); /* all others */
+IBM_HANDLE(sfan, ec, "SFAN", /* 570 */
+ "JFNS", /* 770x-JL */
+ ); /* all others */
+
+static int fan_init(void)
+{
+ fan_status_access_mode = IBMACPI_FAN_NONE;
+ fan_control_access_mode = IBMACPI_FAN_WR_NONE;
+ fan_control_commands = 0;
+ fan_control_status_known = 1;
+ fan_watchdog_maxinterval = 0;
+
+ if (gfan_handle) {
+ /* 570, 600e/x, 770e, 770x */
+ fan_status_access_mode = IBMACPI_FAN_RD_ACPI_GFAN;
+ } else {
+ /* all other ThinkPads: note that even old-style
+ * ThinkPad ECs supports the fan control register */
+ if (likely(acpi_ec_read(fan_status_offset,
+ &fan_control_initial_status))) {
+ fan_status_access_mode = IBMACPI_FAN_RD_TPEC;
+
+ /* In some ThinkPads, neither the EC nor the ACPI
+ * DSDT initialize the fan status, and it ends up
+ * being set to 0x07 when it *could* be either
+ * 0x07 or 0x80.
+ *
+ * Enable for TP-1Y (T43), TP-78 (R51e),
+ * TP-76 (R52), TP-70 (T43, R52), which are known
+ * to be buggy. */
+ if (fan_control_initial_status == 0x07 &&
+ ibm_thinkpad_ec_found &&
+ ((ibm_thinkpad_ec_found[0] == '1' &&
+ ibm_thinkpad_ec_found[1] == 'Y') ||
+ (ibm_thinkpad_ec_found[0] == '7' &&
+ (ibm_thinkpad_ec_found[1] == '6' ||
+ ibm_thinkpad_ec_found[1] == '8' ||
+ ibm_thinkpad_ec_found[1] == '0'))
+ )) {
+ printk(IBM_NOTICE
+ "fan_init: initial fan status is "
+ "unknown, assuming it is in auto "
+ "mode\n");
+ fan_control_status_known = 0;
+ }
+ } else {
+ printk(IBM_ERR
+ "ThinkPad ACPI EC access misbehaving, "
+ "fan status and control unavailable\n");
+ return 0;
+ }
+ }
+
+ if (sfan_handle) {
+ /* 570, 770x-JL */
+ fan_control_access_mode = IBMACPI_FAN_WR_ACPI_SFAN;
+ fan_control_commands |=
+ IBMACPI_FAN_CMD_LEVEL | IBMACPI_FAN_CMD_ENABLE;
+ } else {
+ if (!gfan_handle) {
+ /* gfan without sfan means no fan control */
+ /* all other models implement TP EC 0x2f control */
+
+ if (fans_handle) {
+ /* X31, X40, X41 */
+ fan_control_access_mode =
+ IBMACPI_FAN_WR_ACPI_FANS;
+ fan_control_commands |=
+ IBMACPI_FAN_CMD_SPEED |
+ IBMACPI_FAN_CMD_LEVEL |
+ IBMACPI_FAN_CMD_ENABLE;
+ } else {
+ fan_control_access_mode = IBMACPI_FAN_WR_TPEC;
+ fan_control_commands |=
+ IBMACPI_FAN_CMD_LEVEL |
+ IBMACPI_FAN_CMD_ENABLE;
+ }
+ }
+ }
+
+ return 0;
+}
+
+static int fan_get_status(u8 *status)
+{
+ u8 s;
+
+ /* TODO:
+ * Add IBMACPI_FAN_RD_ACPI_FANS ? */
+
+ switch (fan_status_access_mode) {
+ case IBMACPI_FAN_RD_ACPI_GFAN:
+ /* 570, 600e/x, 770e, 770x */
+
+ if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
+ return -EIO;
+
+ if (likely(status))
+ *status = s & 0x07;
+
+ break;
+
+ case IBMACPI_FAN_RD_TPEC:
+ /* all except 570, 600e/x, 770e, 770x */
+ if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
+ return -EIO;
+
+ if (likely(status))
+ *status = s;
+
+ break;
+
+ default:
+ return -ENXIO;
+ }
+
+ return 0;
+}
+
+static void fan_exit(void)
+{
+ cancel_delayed_work(&fan_watchdog_task);
+ flush_scheduled_work();
+}
+
+static int fan_get_speed(unsigned int *speed)
+{
+ u8 hi, lo;
+
+ switch (fan_status_access_mode) {
+ case IBMACPI_FAN_RD_TPEC:
+ /* all except 570, 600e/x, 770e, 770x */
+ if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
+ !acpi_ec_read(fan_rpm_offset + 1, &hi)))
+ return -EIO;
+
+ if (likely(speed))
+ *speed = (hi << 8) | lo;
+
+ break;
+
+ default:
+ return -ENXIO;
+ }
+
+ return 0;
+}
+
+static void fan_watchdog_fire(struct work_struct *ignored)
+{
+ printk(IBM_NOTICE "fan watchdog: enabling fan\n");
+ if (fan_set_enable()) {
+ printk(IBM_ERR "fan watchdog: error while enabling fan\n");
+ /* reschedule for later */
+ fan_watchdog_reset();
+ }
+}
+
+static void fan_watchdog_reset(void)
+{
+ static int fan_watchdog_active = 0;
+
+ if (fan_watchdog_active)
+ cancel_delayed_work(&fan_watchdog_task);
+
+ if (fan_watchdog_maxinterval > 0) {
+ fan_watchdog_active = 1;
+ if (!schedule_delayed_work(&fan_watchdog_task,
+ msecs_to_jiffies(fan_watchdog_maxinterval
+ * 1000))) {
+ printk(IBM_ERR "failed to schedule the fan watchdog, "
+ "watchdog will not trigger\n");
+ }
+ } else
+ fan_watchdog_active = 0;
+}
+
+static int fan_set_level(int level)
+{
+ switch (fan_control_access_mode) {
+ case IBMACPI_FAN_WR_ACPI_SFAN:
+ if (level >= 0 && level <= 7) {
+ if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
+ return -EIO;
+ } else
+ return -EINVAL;
+ break;
+
+ case IBMACPI_FAN_WR_ACPI_FANS:
+ case IBMACPI_FAN_WR_TPEC:
+ if ((level != IBMACPI_FAN_EC_AUTO) &&
+ (level != IBMACPI_FAN_EC_DISENGAGED) &&
+ ((level < 0) || (level > 7)))
+ return -EINVAL;
+
+ if (!acpi_ec_write(fan_status_offset, level))
+ return -EIO;
+ else
+ fan_control_status_known = 1;
+ break;
+
+ default:
+ return -ENXIO;
+ }
+ return 0;
+}
+
+static int fan_set_enable(void)
+{
+ u8 s;
+ int rc;
+
+ switch (fan_control_access_mode) {
+ case IBMACPI_FAN_WR_ACPI_FANS:
+ case IBMACPI_FAN_WR_TPEC:
+ if ((rc = fan_get_status(&s)) < 0)
+ return rc;
+
+ /* Don't go out of emergency fan mode */
+ if (s != 7)
+ s = IBMACPI_FAN_EC_AUTO;
+
+ if (!acpi_ec_write(fan_status_offset, s))
+ return -EIO;
+ else
+ fan_control_status_known = 1;
+ break;
+
+ case IBMACPI_FAN_WR_ACPI_SFAN:
+ if ((rc = fan_get_status(&s)) < 0)
+ return rc;
+
+ s &= 0x07;
+
+ /* Set fan to at least level 4 */
+ if (s < 4)
+ s = 4;
+
+ if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
+ return -EIO;
+ break;
+
+ default:
+ return -ENXIO;
+ }
+ return 0;
+}
+
+static int fan_set_disable(void)
+{
+ switch (fan_control_access_mode) {
+ case IBMACPI_FAN_WR_ACPI_FANS:
+ case IBMACPI_FAN_WR_TPEC:
+ if (!acpi_ec_write(fan_status_offset, 0x00))
+ return -EIO;
+ else
+ fan_control_status_known = 1;
+ break;
+
+ case IBMACPI_FAN_WR_ACPI_SFAN:
+ if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
+ return -EIO;
+ break;
+
+ default:
+ return -ENXIO;
+ }
+ return 0;
+}
+
+static int fan_set_speed(int speed)
+{
+ switch (fan_control_access_mode) {
+ case IBMACPI_FAN_WR_ACPI_FANS:
+ if (speed >= 0 && speed <= 65535) {
+ if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
+ speed, speed, speed))
+ return -EIO;
+ } else
+ return -EINVAL;
+ break;
+
+ default:
+ return -ENXIO;
+ }
+ return 0;
+}
+
+static int fan_read(char *p)
+{
+ int len = 0;
+ int rc;
+ u8 status;
+ unsigned int speed = 0;
+
+ switch (fan_status_access_mode) {
+ case IBMACPI_FAN_RD_ACPI_GFAN:
+ /* 570, 600e/x, 770e, 770x */
+ if ((rc = fan_get_status(&status)) < 0)
+ return rc;
+
+ len += sprintf(p + len, "status:\t\t%s\n"
+ "level:\t\t%d\n",
+ (status != 0) ? "enabled" : "disabled", status);
+ break;
+
+ case IBMACPI_FAN_RD_TPEC:
+ /* all except 570, 600e/x, 770e, 770x */
+ if ((rc = fan_get_status(&status)) < 0)
+ return rc;
+
+ if (unlikely(!fan_control_status_known)) {
+ if (status != fan_control_initial_status)
+ fan_control_status_known = 1;
+ else
+ /* Return most likely status. In fact, it
+ * might be the only possible status */
+ status = IBMACPI_FAN_EC_AUTO;
+ }
+
+ len += sprintf(p + len, "status:\t\t%s\n",
+ (status != 0) ? "enabled" : "disabled");
+
+ /* No ThinkPad boots on disengaged mode, we can safely
+ * assume the tachometer is online if fan control status
+ * was unknown */
+ if ((rc = fan_get_speed(&speed)) < 0)
+ return rc;
+
+ len += sprintf(p + len, "speed:\t\t%d\n", speed);
+
+ if (status & IBMACPI_FAN_EC_DISENGAGED)
+ /* Disengaged mode takes precedence */
+ len += sprintf(p + len, "level:\t\tdisengaged\n");
+ else if (status & IBMACPI_FAN_EC_AUTO)
+ len += sprintf(p + len, "level:\t\tauto\n");
+ else
+ len += sprintf(p + len, "level:\t\t%d\n", status);
+ break;
+
+ case IBMACPI_FAN_NONE:
+ default:
+ len += sprintf(p + len, "status:\t\tnot supported\n");
+ }
+
+ if (fan_control_commands & IBMACPI_FAN_CMD_LEVEL) {
+ len += sprintf(p + len, "commands:\tlevel <level>");
+
+ switch (fan_control_access_mode) {
+ case IBMACPI_FAN_WR_ACPI_SFAN:
+ len += sprintf(p + len, " (<level> is 0-7)\n");
+ break;
+
+ default:
+ len += sprintf(p + len, " (<level> is 0-7, "
+ "auto, disengaged)\n");
+ break;
+ }
+ }
+
+ if (fan_control_commands & IBMACPI_FAN_CMD_ENABLE)
+ len += sprintf(p + len, "commands:\tenable, disable\n"
+ "commands:\twatchdog <timeout> (<timeout> is 0 (off), "
+ "1-120 (seconds))\n");
+
+ if (fan_control_commands & IBMACPI_FAN_CMD_SPEED)
+ len += sprintf(p + len, "commands:\tspeed <speed>"
+ " (<speed> is 0-65535)\n");
+
+ return len;
+}
+
+static int fan_write_cmd_level(const char *cmd, int *rc)
+{
+ int level;
+
+ if (strlencmp(cmd, "level auto") == 0)
+ level = IBMACPI_FAN_EC_AUTO;
+ else if (strlencmp(cmd, "level disengaged") == 0)
+ level = IBMACPI_FAN_EC_DISENGAGED;
+ else if (sscanf(cmd, "level %d", &level) != 1)
+ return 0;
+
+ if ((*rc = fan_set_level(level)) == -ENXIO)
+ printk(IBM_ERR "level command accepted for unsupported "
+ "access mode %d", fan_control_access_mode);
+
+ return 1;
+}
+
+static int fan_write_cmd_enable(const char *cmd, int *rc)
+{
+ if (strlencmp(cmd, "enable") != 0)
+ return 0;
+
+ if ((*rc = fan_set_enable()) == -ENXIO)
+ printk(IBM_ERR "enable command accepted for unsupported "
+ "access mode %d", fan_control_access_mode);
+
+ return 1;
+}
+
+static int fan_write_cmd_disable(const char *cmd, int *rc)
+{
+ if (strlencmp(cmd, "disable") != 0)
+ return 0;
+
+ if ((*rc = fan_set_disable()) == -ENXIO)
+ printk(IBM_ERR "disable command accepted for unsupported "
+ "access mode %d", fan_control_access_mode);
+
+ return 1;
+}
+
+static int fan_write_cmd_speed(const char *cmd, int *rc)
+{
+ int speed;
+
+ /* TODO:
+ * Support speed <low> <medium> <high> ? */
+
+ if (sscanf(cmd, "speed %d", &speed) != 1)
+ return 0;
+
+ if ((*rc = fan_set_speed(speed)) == -ENXIO)
+ printk(IBM_ERR "speed command accepted for unsupported "
+ "access mode %d", fan_control_access_mode);
+
+ return 1;
+}
+
+static int fan_write_cmd_watchdog(const char *cmd, int *rc)
+{
+ int interval;
+
+ if (sscanf(cmd, "watchdog %d", &interval) != 1)
+ return 0;
+
+ if (interval < 0 || interval > 120)
+ *rc = -EINVAL;
+ else
+ fan_watchdog_maxinterval = interval;
+
+ return 1;
+}
+
+static int fan_write(char *buf)
+{
+ char *cmd;
+ int rc = 0;
+
+ while (!rc && (cmd = next_cmd(&buf))) {
+ if (!((fan_control_commands & IBMACPI_FAN_CMD_LEVEL) &&
+ fan_write_cmd_level(cmd, &rc)) &&
+ !((fan_control_commands & IBMACPI_FAN_CMD_ENABLE) &&
+ (fan_write_cmd_enable(cmd, &rc) ||
+ fan_write_cmd_disable(cmd, &rc) ||
+ fan_write_cmd_watchdog(cmd, &rc))) &&
+ !((fan_control_commands & IBMACPI_FAN_CMD_SPEED) &&
+ fan_write_cmd_speed(cmd, &rc))
+ )
+ rc = -EINVAL;
+ else if (!rc)
+ fan_watchdog_reset();
+ }
+
+ return rc;
+}
+
+/****************************************************************************
+ ****************************************************************************
+ *
+ * Infrastructure
+ *
+ ****************************************************************************
+ ****************************************************************************/
+
+/* /proc support */
+static struct proc_dir_entry *proc_dir = NULL;
+
+/* Subdriver registry */
+static struct ibm_struct ibms[] = {
+ {
+ .name = "driver",
+ .init = ibm_acpi_driver_init,
+ .read = ibm_acpi_driver_read,
+ },
+ {
+ .name = "hotkey",
+ .hid = IBM_HKEY_HID,
+ .init = hotkey_init,
+ .read = hotkey_read,
+ .write = hotkey_write,
+ .exit = hotkey_exit,
+ .notify = hotkey_notify,
+ .handle = &hkey_handle,
+ .type = ACPI_DEVICE_NOTIFY,
+ },
+ {
+ .name = "bluetooth",
+ .init = bluetooth_init,
+ .read = bluetooth_read,
+ .write = bluetooth_write,
+ },
+ {
+ .name = "wan",
+ .init = wan_init,
+ .read = wan_read,
+ .write = wan_write,
+ .experimental = 1,
+ },
+ {
+ .name = "video",
+ .init = video_init,
+ .read = video_read,
+ .write = video_write,
+ .exit = video_exit,
+ },
+ {
+ .name = "light",
+ .init = light_init,
+ .read = light_read,
+ .write = light_write,
+ },
+#ifdef CONFIG_ACPI_IBM_DOCK
+ {
+ .name = "dock",
+ .read = dock_read,
+ .write = dock_write,
+ .notify = dock_notify,
+ .handle = &dock_handle,
+ .type = ACPI_SYSTEM_NOTIFY,
+ },
+ {
+ .name = "dock",
+ .hid = IBM_PCI_HID,
+ .notify = dock_notify,
+ .handle = &pci_handle,
+ .type = ACPI_SYSTEM_NOTIFY,
+ },
+#endif
+#ifdef CONFIG_ACPI_IBM_BAY
+ {
+ .name = "bay",
+ .init = bay_init,
+ .read = bay_read,
+ .write = bay_write,
+ .notify = bay_notify,
+ .handle = &bay_handle,
+ .type = ACPI_SYSTEM_NOTIFY,
+ },
+#endif /* CONFIG_ACPI_IBM_BAY */
+ {
+ .name = "cmos",
+ .read = cmos_read,
+ .write = cmos_write,
+ },
+ {
+ .name = "led",
+ .init = led_init,
+ .read = led_read,
+ .write = led_write,
+ },
+ {
+ .name = "beep",
+ .read = beep_read,
+ .write = beep_write,
+ },
+ {
+ .name = "thermal",
+ .init = thermal_init,
+ .read = thermal_read,
+ },
+ {
+ .name = "ecdump",
+ .read = ecdump_read,
+ .write = ecdump_write,
+ .experimental = 1,
+ },
+ {
+ .name = "brightness",
+ .read = brightness_read,
+ .write = brightness_write,
+ .init = brightness_init,
+ .exit = brightness_exit,
+ },
+ {
+ .name = "volume",
+ .read = volume_read,
+ .write = volume_write,
+ },
+ {
+ .name = "fan",
+ .read = fan_read,
+ .write = fan_write,
+ .init = fan_init,
+ .exit = fan_exit,
+ .experimental = 1,
+ },
+};
+
+/*
+ * Module and infrastructure proble, init and exit handling
+ */
+
+static int __init ibm_init(struct ibm_struct *ibm)
+{
+ int ret;
+ struct proc_dir_entry *entry;
+
+ if (ibm->experimental && !experimental)
+ return 0;
+
+ if (ibm->hid) {
+ ret = register_ibmacpi_subdriver(ibm);
+ if (ret < 0)
+ return ret;
+ ibm->driver_registered = 1;
+ }
+
+ if (ibm->init) {
+ ret = ibm->init();
+ if (ret != 0)
+ return ret;
+ ibm->init_called = 1;
+ }
+
+ if (ibm->read) {
+ entry = create_proc_entry(ibm->name,
+ S_IFREG | S_IRUGO | S_IWUSR,
+ proc_dir);
+ if (!entry) {
+ printk(IBM_ERR "unable to create proc entry %s\n",
+ ibm->name);
+ return -ENODEV;
+ }
+ entry->owner = THIS_MODULE;
+ entry->data = ibm;
+ entry->read_proc = &dispatch_read;
+ if (ibm->write)
+ entry->write_proc = &dispatch_write;
+ 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;
+}
+
+static void ibm_exit(struct ibm_struct *ibm)
+{
+ if (ibm->notify_installed)
+ acpi_remove_notify_handler(*ibm->handle, ibm->type,
+ dispatch_notify);
+
+ if (ibm->proc_created)
+ remove_proc_entry(ibm->name, proc_dir);
+
+ if (ibm->init_called && ibm->exit)
+ ibm->exit();
+
+ if (ibm->driver_registered) {
+ acpi_bus_unregister_driver(ibm->driver);
+ kfree(ibm->driver);
+ }
+}
+
+/* Probing */
+
+static char *ibm_thinkpad_ec_found = NULL;
+
+static char* __init check_dmi_for_ec(void)
+{
+ struct dmi_device *dev = NULL;
+ char ec_fw_string[18];
+
+ /*
+ * ThinkPad T23 or newer, A31 or newer, R50e or newer,
+ * X32 or newer, all Z series; Some models must have an
+ * up-to-date BIOS or they will not be detected.
+ *
+ * See http://thinkwiki.org/wiki/List_of_DMI_IDs
+ */
+ while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
+ if (sscanf(dev->name,
+ "IBM ThinkPad Embedded Controller -[%17c",
+ ec_fw_string) == 1) {
+ ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
+ ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
+ return kstrdup(ec_fw_string, GFP_KERNEL);
+ }
+ }
+ return NULL;
+}
+
+/* Module init, exit, parameters */
+
+static int __init set_ibm_param(const char *val, struct kernel_param *kp)
+{
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(ibms); i++)
+ if (strcmp(ibms[i].name, kp->name) == 0 && ibms[i].write) {
+ if (strlen(val) > sizeof(ibms[i].param) - 2)
+ return -ENOSPC;
+ strcpy(ibms[i].param, val);
+ strcat(ibms[i].param, ",");
+ return 0;
+ }
+
+ return -EINVAL;
+}
+
+static int experimental;
+module_param(experimental, int, 0);
+
+#define IBM_PARAM(feature) \
+ module_param_call(feature, set_ibm_param, NULL, NULL, 0)
+
+IBM_PARAM(hotkey);
+IBM_PARAM(bluetooth);
+IBM_PARAM(video);
+IBM_PARAM(light);
+#ifdef CONFIG_ACPI_IBM_DOCK
+IBM_PARAM(dock);
+#endif
+#ifdef CONFIG_ACPI_IBM_BAY
+IBM_PARAM(bay);
+#endif /* CONFIG_ACPI_IBM_BAY */
+IBM_PARAM(cmos);
+IBM_PARAM(led);
+IBM_PARAM(beep);
+IBM_PARAM(ecdump);
+IBM_PARAM(brightness);
+IBM_PARAM(volume);
+IBM_PARAM(fan);
+
+static int __init acpi_ibm_init(void)
+{
+ int ret, i;
+
+ if (acpi_disabled)
+ return -ENODEV;
+
+ /* 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_ACPI_IBM_DOCK
+ IBM_HANDLE_INIT(dock);
+#endif
+ IBM_HANDLE_INIT(pci);
+#ifdef CONFIG_ACPI_IBM_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_ACPI_IBM_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) {
+ printk(IBM_ERR "unable to create proc dir %s", IBM_DIR);
+ acpi_ibm_exit();
+ return -ENODEV;
+ }
+ proc_dir->owner = THIS_MODULE;
+
+ for (i = 0; i < ARRAY_SIZE(ibms); i++) {
+ ret = ibm_init(&ibms[i]);
+ if (ret >= 0 && *ibms[i].param)
+ ret = ibms[i].write(ibms[i].param);
+ if (ret < 0) {
+ acpi_ibm_exit();
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+static void acpi_ibm_exit(void)
+{
+ int i;
+
+ for (i = ARRAY_SIZE(ibms) - 1; i >= 0; i--)
+ ibm_exit(&ibms[i]);
+
+ if (proc_dir)
+ remove_proc_entry(IBM_DIR, acpi_root_dir);
+
+ if (ibm_thinkpad_ec_found)
+ kfree(ibm_thinkpad_ec_found);
+}
+
+module_init(acpi_ibm_init);
+module_exit(acpi_ibm_exit);