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-rw-r--r--drivers/acpi/ibm_acpi.c1242
1 files changed, 1242 insertions, 0 deletions
diff --git a/drivers/acpi/ibm_acpi.c b/drivers/acpi/ibm_acpi.c
new file mode 100644
index 000000000000..0fb731a470dc
--- /dev/null
+++ b/drivers/acpi/ibm_acpi.c
@@ -0,0 +1,1242 @@
+/*
+ * ibm_acpi.c - IBM ThinkPad ACPI Extras
+ *
+ *
+ * Copyright (C) 2004 Borislav Deianov
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * Changelog:
+ *
+ * 2004-08-09 0.1 initial release, support for X series
+ * 2004-08-14 0.2 support for T series, X20
+ * bluetooth enable/disable
+ * hotkey events disabled by default
+ * removed fan control, currently useless
+ * 2004-08-17 0.3 support for R40
+ * lcd off, brightness control
+ * thinklight on/off
+ * 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
+ * 2004-10-18 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
+ * 2004-10-19 0.6 use acpi_bus_register_driver() to claim HKEY device
+ * 2004-10-23 0.7 fix module loading on A21e, A22p, T20, T21, X20
+ * fix LED control on A21e
+ * 2004-11-08 0.8 fix init error case, don't return from a macro
+ * thanks to Chris Wright <chrisw@osdl.org>
+ */
+
+#define IBM_VERSION "0.8"
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/proc_fs.h>
+#include <asm/uaccess.h>
+
+#include <acpi/acpi_drivers.h>
+#include <acpi/acnamesp.h>
+
+#define IBM_NAME "ibm"
+#define IBM_DESC "IBM ThinkPad ACPI Extras"
+#define IBM_FILE "ibm_acpi"
+#define IBM_URL "http://ibm-acpi.sf.net/"
+
+#define IBM_DIR IBM_NAME
+
+#define IBM_LOG IBM_FILE ": "
+#define IBM_ERR KERN_ERR IBM_LOG
+#define IBM_NOTICE KERN_NOTICE IBM_LOG
+#define IBM_INFO KERN_INFO IBM_LOG
+#define IBM_DEBUG KERN_DEBUG IBM_LOG
+
+#define IBM_MAX_ACPI_ARGS 3
+
+#define __unused __attribute__ ((unused))
+
+static int experimental;
+module_param(experimental, int, 0);
+
+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##_paths[] = { paths }
+
+IBM_HANDLE(ec, root,
+ "\\_SB.PCI0.ISA.EC", /* A21e, A22p, T20, T21, X20 */
+ "\\_SB.PCI0.LPC.EC", /* all others */
+);
+
+IBM_HANDLE(vid, root,
+ "\\_SB.PCI0.VID", /* A21e, G40, X30, X40 */
+ "\\_SB.PCI0.AGP.VID", /* all others */
+);
+
+IBM_HANDLE(cmos, root,
+ "\\UCMS", /* R50, R50p, R51, T4x, X31, X40 */
+ "\\CMOS", /* A3x, G40, R32, T23, T30, X22, X24, X30 */
+ "\\CMS", /* R40, R40e */
+); /* A21e, A22p, T20, T21, X20 */
+
+IBM_HANDLE(dock, root,
+ "\\_SB.GDCK", /* X30, X31, X40 */
+ "\\_SB.PCI0.DOCK", /* A22p, T20, T21, X20 */
+ "\\_SB.PCI0.PCI1.DOCK", /* all others */
+); /* A21e, G40, R32, R40, R40e */
+
+IBM_HANDLE(bay, root,
+ "\\_SB.PCI0.IDE0.SCND.MSTR"); /* all except A21e */
+IBM_HANDLE(bayej, root,
+ "\\_SB.PCI0.IDE0.SCND.MSTR._EJ0"); /* all except A2x, A3x */
+
+IBM_HANDLE(lght, root, "\\LGHT"); /* A21e, A22p, T20, T21, X20 */
+IBM_HANDLE(hkey, ec, "HKEY"); /* all */
+IBM_HANDLE(led, ec, "LED"); /* all except A21e, A22p, T20, T21, X20 */
+IBM_HANDLE(sysl, ec, "SYSL"); /* A21e, A22p, T20, T21, X20 */
+IBM_HANDLE(bled, ec, "BLED"); /* A22p, T20, T21, X20 */
+IBM_HANDLE(beep, ec, "BEEP"); /* all models */
+
+struct ibm_struct {
+ char *name;
+
+ char *hid;
+ struct acpi_driver *driver;
+
+ int (*init) (struct ibm_struct *);
+ int (*read) (struct ibm_struct *, char *);
+ int (*write) (struct ibm_struct *, char *);
+ void (*exit) (struct ibm_struct *);
+
+ void (*notify) (struct ibm_struct *, u32);
+ acpi_handle *handle;
+ int type;
+ struct acpi_device *device;
+
+ int driver_registered;
+ int proc_created;
+ int init_called;
+ int notify_installed;
+
+ int supported;
+ union {
+ struct {
+ int status;
+ int mask;
+ } hotkey;
+ struct {
+ int autoswitch;
+ } video;
+ } state;
+
+ int experimental;
+};
+
+static struct proc_dir_entry *proc_dir = NULL;
+
+#define onoff(status,bit) ((status) & (1 << (bit)) ? "on" : "off")
+#define enabled(status,bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
+#define strlencmp(a,b) (strncmp((a), (b), strlen(b)))
+
+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;
+ 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);
+
+ result.length = sizeof(out_obj);
+ result.pointer = &out_obj;
+
+ status = acpi_evaluate_object(handle, method, &params, &result);
+
+ 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 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;
+}
+
+static int driver_init(struct ibm_struct *ibm)
+{
+ printk(IBM_INFO "%s v%s\n", IBM_DESC, IBM_VERSION);
+ printk(IBM_INFO "%s\n", IBM_URL);
+
+ return 0;
+}
+
+static int driver_read(struct ibm_struct *ibm, 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;
+}
+
+static int hotkey_get(struct ibm_struct *ibm, int *status, int *mask)
+{
+ if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
+ return -EIO;
+ if (ibm->supported) {
+ if (!acpi_evalf(hkey_handle, mask, "DHKN", "qd"))
+ return -EIO;
+ } else {
+ *mask = ibm->state.hotkey.mask;
+ }
+ return 0;
+}
+
+static int hotkey_set(struct ibm_struct *ibm, int status, int mask)
+{
+ int i;
+
+ if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", status))
+ return -EIO;
+
+ if (!ibm->supported)
+ return 0;
+
+ for (i=0; i<32; i++) {
+ int bit = ((1 << i) & mask) != 0;
+ if (!acpi_evalf(hkey_handle, NULL, "MHKM", "vdd", i+1, bit))
+ return -EIO;
+ }
+
+ return 0;
+}
+
+static int hotkey_init(struct ibm_struct *ibm)
+{
+ int ret;
+
+ ibm->supported = 1;
+ ret = hotkey_get(ibm,
+ &ibm->state.hotkey.status,
+ &ibm->state.hotkey.mask);
+ if (ret < 0) {
+ /* mask not supported on A21e, A22p, T20, T21, X20, X22, X24 */
+ ibm->supported = 0;
+ ret = hotkey_get(ibm,
+ &ibm->state.hotkey.status,
+ &ibm->state.hotkey.mask);
+ }
+
+ return ret;
+}
+
+static int hotkey_read(struct ibm_struct *ibm, char *p)
+{
+ int status, mask;
+ int len = 0;
+
+ if (hotkey_get(ibm, &status, &mask) < 0)
+ return -EIO;
+
+ len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
+ if (ibm->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(struct ibm_struct *ibm, char *buf)
+{
+ int status, mask;
+ char *cmd;
+ int do_cmd = 0;
+
+ if (hotkey_get(ibm, &status, &mask) < 0)
+ return -ENODEV;
+
+ 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 = ibm->state.hotkey.status;
+ mask = ibm->state.hotkey.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(ibm, status, mask) < 0)
+ return -EIO;
+
+ return 0;
+}
+
+static void hotkey_exit(struct ibm_struct *ibm)
+{
+ hotkey_set(ibm, ibm->state.hotkey.status, ibm->state.hotkey.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 bluetooth_init(struct ibm_struct *ibm)
+{
+ /* bluetooth not supported on A21e, G40, T20, T21, X20 */
+ ibm->supported = acpi_evalf(hkey_handle, NULL, "GBDC", "qv");
+
+ return 0;
+}
+
+static int bluetooth_status(struct ibm_struct *ibm)
+{
+ int status;
+
+ if (!ibm->supported || !acpi_evalf(hkey_handle, &status, "GBDC", "d"))
+ status = 0;
+
+ return status;
+}
+
+static int bluetooth_read(struct ibm_struct *ibm, char *p)
+{
+ int len = 0;
+ int status = bluetooth_status(ibm);
+
+ if (!ibm->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(struct ibm_struct *ibm, char *buf)
+{
+ int status = bluetooth_status(ibm);
+ char *cmd;
+ int do_cmd = 0;
+
+ if (!ibm->supported)
+ return -EINVAL;
+
+ 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;
+}
+
+static int video_init(struct ibm_struct *ibm)
+{
+ if (!acpi_evalf(vid_handle,
+ &ibm->state.video.autoswitch, "^VDEE", "d"))
+ return -ENODEV;
+
+ return 0;
+}
+
+static int video_status(struct ibm_struct *ibm)
+{
+ int status = 0;
+ int i;
+
+ 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;
+
+ if (acpi_evalf(vid_handle, &i, "^VDEE", "d"))
+ status |= 0x10 * (i & 1);
+
+ return status;
+}
+
+static int video_read(struct ibm_struct *ibm, char *p)
+{
+ int status = video_status(ibm);
+ int len = 0;
+
+ len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
+ len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
+ len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
+ len += sprintf(p + len, "auto:\t\t%s\n", enabled(status, 4));
+ len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable, "
+ "crt_enable, crt_disable\n");
+ len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable, "
+ "auto_enable, auto_disable\n");
+ len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
+
+ return len;
+}
+
+static int video_write(struct ibm_struct *ibm, char *buf)
+{
+ char *cmd;
+ int enable, disable, status;
+
+ 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 (strlencmp(cmd, "dvi_enable") == 0) {
+ enable |= 0x08;
+ } else if (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) {
+ int autoswitch;
+ if (!acpi_evalf(vid_handle, &autoswitch, "^VDEE", "d"))
+ return -EIO;
+ if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", 1))
+ return -EIO;
+ if (!acpi_evalf(vid_handle, NULL, "VSWT", "v"))
+ return -EIO;
+ if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd",
+ autoswitch))
+ return -EIO;
+ } else if (strlencmp(cmd, "expand_toggle") == 0) {
+ if (!acpi_evalf(NULL, NULL, "\\VEXP", "v"))
+ return -EIO;
+ } else
+ return -EINVAL;
+ }
+
+ if (enable || disable) {
+ status = (video_status(ibm) & 0x0f & ~disable) | enable;
+ if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80))
+ return -EIO;
+ if (!acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1))
+ return -EIO;
+ }
+
+ return 0;
+}
+
+static void video_exit(struct ibm_struct *ibm)
+{
+ acpi_evalf(vid_handle, NULL, "_DOS", "vd",
+ ibm->state.video.autoswitch);
+}
+
+static int light_init(struct ibm_struct *ibm)
+{
+ /* kblt not supported on G40, R32, X20 */
+ ibm->supported = acpi_evalf(ec_handle, NULL, "KBLT", "qv");
+
+ return 0;
+}
+
+static int light_read(struct ibm_struct *ibm, char *p)
+{
+ int len = 0;
+ int status = 0;
+
+ if (ibm->supported) {
+ if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
+ return -EIO;
+ len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
+ } else
+ len += sprintf(p + len, "status:\t\tunknown\n");
+
+ len += sprintf(p + len, "commands:\ton, off\n");
+
+ return len;
+}
+
+static int light_write(struct ibm_struct *ibm, char *buf)
+{
+ int cmos_cmd, lght_cmd;
+ char *cmd;
+ int success;
+
+ 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;
+}
+
+static int _sta(acpi_handle handle)
+{
+ int status;
+
+ if (!handle || !acpi_evalf(handle, &status, "_STA", "d"))
+ status = 0;
+
+ return status;
+}
+
+#define dock_docked() (_sta(dock_handle) & 1)
+
+static int dock_read(struct ibm_struct *ibm, 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(struct ibm_struct *ibm, char *buf)
+{
+ char *cmd;
+
+ if (!dock_docked())
+ return -EINVAL;
+
+ while ((cmd = next_cmd(&buf))) {
+ if (strlencmp(cmd, "undock") == 0) {
+ if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0))
+ return -EIO;
+ if (!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;
+}
+
+static void dock_notify(struct ibm_struct *ibm, u32 event)
+{
+ int docked = dock_docked();
+
+ 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 */
+ }
+}
+
+#define bay_occupied() (_sta(bay_handle) & 1)
+
+static int bay_init(struct ibm_struct *ibm)
+{
+ /* bay not supported on A21e, A22p, A31, A31p, G40, R32, R40e */
+ ibm->supported = bay_handle && bayej_handle &&
+ acpi_evalf(bay_handle, NULL, "_STA", "qv");
+
+ return 0;
+}
+
+static int bay_read(struct ibm_struct *ibm, char *p)
+{
+ int len = 0;
+ int occupied = bay_occupied();
+
+ if (!ibm->supported)
+ len += sprintf(p + len, "status:\t\tnot supported\n");
+ else if (!occupied)
+ len += sprintf(p + len, "status:\t\tunoccupied\n");
+ else {
+ len += sprintf(p + len, "status:\t\toccupied\n");
+ len += sprintf(p + len, "commands:\teject\n");
+ }
+
+ return len;
+}
+
+static int bay_write(struct ibm_struct *ibm, char *buf)
+{
+ char *cmd;
+
+ while ((cmd = next_cmd(&buf))) {
+ if (strlencmp(cmd, "eject") == 0) {
+ if (!ibm->supported ||
+ !acpi_evalf(bay_handle, NULL, "_EJ0", "vd", 1))
+ return -EIO;
+ } else
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static void bay_notify(struct ibm_struct *ibm, u32 event)
+{
+ acpi_bus_generate_event(ibm->device, event, 0);
+}
+
+static int cmos_read(struct ibm_struct *ibm, char *p)
+{
+ int len = 0;
+
+ /* cmos not supported on A21e, A22p, T20, T21, X20 */
+ 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<int>\n");
+ }
+
+ return len;
+}
+
+static int cmos_write(struct ibm_struct *ibm, 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 set */
+ } else
+ return -EINVAL;
+
+ if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
+ return -EIO;
+ }
+
+ return 0;
+}
+
+static int led_read(struct ibm_struct *ibm, char *p)
+{
+ int len = 0;
+
+ len += sprintf(p + len, "commands:\t"
+ "<int> on, <int> off, <int> blink\n");
+
+ return len;
+}
+
+static int led_write(struct ibm_struct *ibm, char *buf)
+{
+ char *cmd;
+ unsigned int led;
+ int led_cmd, sysl_cmd, bled_a, bled_b;
+
+ while ((cmd = next_cmd(&buf))) {
+ if (sscanf(cmd, "%u", &led) != 1)
+ return -EINVAL;
+
+ if (strstr(cmd, "blink")) {
+ led_cmd = 0xc0;
+ sysl_cmd = 2;
+ bled_a = 2;
+ bled_b = 1;
+ } else if (strstr(cmd, "on")) {
+ led_cmd = 0x80;
+ sysl_cmd = 1;
+ bled_a = 2;
+ bled_b = 0;
+ } else if (strstr(cmd, "off")) {
+ led_cmd = sysl_cmd = bled_a = bled_b = 0;
+ } else
+ return -EINVAL;
+
+ if (led_handle) {
+ if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
+ led, led_cmd))
+ return -EIO;
+ } else if (led < 2) {
+ if (acpi_evalf(sysl_handle, NULL, NULL, "vdd",
+ led, sysl_cmd))
+ return -EIO;
+ } else if (led == 2 && bled_handle) {
+ if (acpi_evalf(bled_handle, NULL, NULL, "vdd",
+ bled_a, bled_b))
+ return -EIO;
+ } else
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int beep_read(struct ibm_struct *ibm, char *p)
+{
+ int len = 0;
+
+ len += sprintf(p + len, "commands:\t<int>\n");
+
+ return len;
+}
+
+static int beep_write(struct ibm_struct *ibm, char *buf)
+{
+ char *cmd;
+ int beep_cmd;
+
+ while ((cmd = next_cmd(&buf))) {
+ if (sscanf(cmd, "%u", &beep_cmd) == 1) {
+ /* beep_cmd set */
+ } else
+ return -EINVAL;
+
+ if (!acpi_evalf(beep_handle, NULL, NULL, "vd", beep_cmd))
+ return -EIO;
+ }
+
+ return 0;
+}
+
+static struct ibm_struct ibms[] = {
+ {
+ .name = "driver",
+ .init = driver_init,
+ .read = driver_read,
+ },
+ {
+ .name = "hotkey",
+ .hid = "IBM0068",
+ .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 = "video",
+ .init = video_init,
+ .read = video_read,
+ .write = video_write,
+ .exit = video_exit,
+ },
+ {
+ .name = "light",
+ .init = light_init,
+ .read = light_read,
+ .write = light_write,
+ },
+ {
+ .name = "dock",
+ .read = dock_read,
+ .write = dock_write,
+ .notify = dock_notify,
+ .handle = &dock_handle,
+ .type = ACPI_SYSTEM_NOTIFY,
+ },
+ {
+ .name = "bay",
+ .init = bay_init,
+ .read = bay_read,
+ .write = bay_write,
+ .notify = bay_notify,
+ .handle = &bay_handle,
+ .type = ACPI_SYSTEM_NOTIFY,
+ },
+ {
+ .name = "cmos",
+ .read = cmos_read,
+ .write = cmos_write,
+ .experimental = 1,
+ },
+ {
+ .name = "led",
+ .read = led_read,
+ .write = led_write,
+ .experimental = 1,
+ },
+ {
+ .name = "beep",
+ .read = beep_read,
+ .write = beep_write,
+ .experimental = 1,
+ },
+};
+#define NUM_IBMS (sizeof(ibms)/sizeof(ibms[0]))
+
+static int dispatch_read(char *page, char **start, off_t off, int count,
+ int *eof, void *data)
+{
+ struct ibm_struct *ibm = (struct ibm_struct *)data;
+ int len;
+
+ if (!ibm || !ibm->read)
+ return -EINVAL;
+
+ len = ibm->read(ibm, 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 = (struct ibm_struct *)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(ibm, kernbuf);
+ if (ret == 0)
+ ret = count;
+
+ kfree(kernbuf);
+
+ return ret;
+}
+
+static void dispatch_notify(acpi_handle handle, u32 event, void *data)
+{
+ struct ibm_struct *ibm = (struct ibm_struct *)data;
+
+ if (!ibm || !ibm->notify)
+ return;
+
+ ibm->notify(ibm, event);
+}
+
+static int 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 0;
+ }
+
+ 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)) {
+ printk(IBM_ERR "acpi_install_notify_handler(%s) failed: %d\n",
+ ibm->name, status);
+ return -ENODEV;
+ }
+
+ ibm->notify_installed = 1;
+
+ return 0;
+}
+
+static int device_add(struct acpi_device *device)
+{
+ return 0;
+}
+
+static int register_driver(struct ibm_struct *ibm)
+{
+ int ret;
+
+ ibm->driver = kmalloc(sizeof(struct acpi_driver), GFP_KERNEL);
+ if (!ibm->driver) {
+ printk(IBM_ERR "kmalloc(ibm->driver) failed\n");
+ return -1;
+ }
+
+ memset(ibm->driver, 0, sizeof(struct acpi_driver));
+ sprintf(ibm->driver->name, "%s/%s", IBM_NAME, ibm->name);
+ ibm->driver->ids = ibm->hid;
+ ibm->driver->ops.add = &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;
+}
+
+static int ibm_init(struct ibm_struct *ibm)
+{
+ int ret;
+ struct proc_dir_entry *entry;
+
+ if (ibm->experimental && !experimental)
+ return 0;
+
+ if (ibm->hid) {
+ ret = register_driver(ibm);
+ if (ret < 0)
+ return ret;
+ ibm->driver_registered = 1;
+ }
+
+ if (ibm->init) {
+ ret = ibm->init(ibm);
+ if (ret != 0)
+ return ret;
+ ibm->init_called = 1;
+ }
+
+ 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;
+ ibm->proc_created = 1;
+
+ entry->data = ibm;
+ if (ibm->read)
+ entry->read_proc = &dispatch_read;
+ if (ibm->write)
+ entry->write_proc = &dispatch_write;
+
+ if (ibm->notify) {
+ ret = setup_notify(ibm);
+ 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(ibm);
+
+ if (ibm->driver_registered) {
+ acpi_bus_unregister_driver(ibm->driver);
+ kfree(ibm->driver);
+ }
+}
+
+static int ibm_handle_init(char *name,
+ acpi_handle *handle, acpi_handle parent,
+ char **paths, int num_paths, int required)
+{
+ int i;
+ acpi_status status;
+
+ for (i=0; i<num_paths; i++) {
+ status = acpi_get_handle(parent, paths[i], handle);
+ if (ACPI_SUCCESS(status))
+ return 0;
+ }
+
+ *handle = NULL;
+
+ if (required) {
+ printk(IBM_ERR "%s object not found\n", name);
+ return -1;
+ }
+
+ return 0;
+}
+
+#define IBM_HANDLE_INIT(object, required) \
+ ibm_handle_init(#object, &object##_handle, *object##_parent, \
+ object##_paths, sizeof(object##_paths)/sizeof(char*), required)
+
+
+static int set_ibm_param(const char *val, struct kernel_param *kp)
+{
+ unsigned int i;
+ char arg_with_comma[32];
+
+ if (strlen(val) > 30)
+ return -ENOSPC;
+
+ strcpy(arg_with_comma, val);
+ strcat(arg_with_comma, ",");
+
+ for (i=0; i<NUM_IBMS; i++)
+ if (strcmp(ibms[i].name, kp->name) == 0)
+ return ibms[i].write(&ibms[i], arg_with_comma);
+ BUG();
+ return -EINVAL;
+}
+
+#define IBM_PARAM(feature) \
+ module_param_call(feature, set_ibm_param, NULL, NULL, 0)
+
+static void acpi_ibm_exit(void)
+{
+ int i;
+
+ for (i=NUM_IBMS-1; i>=0; i--)
+ ibm_exit(&ibms[i]);
+
+ remove_proc_entry(IBM_DIR, acpi_root_dir);
+}
+
+static int __init acpi_ibm_init(void)
+{
+ int ret, i;
+
+ if (acpi_disabled)
+ return -ENODEV;
+
+ /* these handles are required */
+ if (IBM_HANDLE_INIT(ec, 1) < 0 ||
+ IBM_HANDLE_INIT(hkey, 1) < 0 ||
+ IBM_HANDLE_INIT(vid, 1) < 0 ||
+ IBM_HANDLE_INIT(beep, 1) < 0)
+ return -ENODEV;
+
+ /* these handles have alternatives */
+ IBM_HANDLE_INIT(lght, 0);
+ if (IBM_HANDLE_INIT(cmos, !lght_handle) < 0)
+ return -ENODEV;
+ IBM_HANDLE_INIT(sysl, 0);
+ if (IBM_HANDLE_INIT(led, !sysl_handle) < 0)
+ return -ENODEV;
+
+ /* these handles are not required */
+ IBM_HANDLE_INIT(dock, 0);
+ IBM_HANDLE_INIT(bay, 0);
+ IBM_HANDLE_INIT(bayej, 0);
+ IBM_HANDLE_INIT(bled, 0);
+
+ proc_dir = proc_mkdir(IBM_DIR, acpi_root_dir);
+ if (!proc_dir) {
+ printk(IBM_ERR "unable to create proc dir %s", IBM_DIR);
+ return -ENODEV;
+ }
+ proc_dir->owner = THIS_MODULE;
+
+ for (i=0; i<NUM_IBMS; i++) {
+ ret = ibm_init(&ibms[i]);
+ if (ret < 0) {
+ acpi_ibm_exit();
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+module_init(acpi_ibm_init);
+module_exit(acpi_ibm_exit);
+
+MODULE_AUTHOR("Borislav Deianov");
+MODULE_DESCRIPTION(IBM_DESC);
+MODULE_LICENSE("GPL");
+
+IBM_PARAM(hotkey);
+IBM_PARAM(bluetooth);
+IBM_PARAM(video);
+IBM_PARAM(light);
+IBM_PARAM(dock);
+IBM_PARAM(bay);
+IBM_PARAM(cmos);
+IBM_PARAM(led);
+IBM_PARAM(beep);
generated by cgit v1.2.3-55-g7522 (git 2.39.0) at 2024-06-03 23:47:04 +0200