--- /dev/null
+/*
+ * Wistron laptop button driver
+ * Copyright (C) 2005 Miloslav Trmac <mitr@volny.cz>
+ *
+ * You can redistribute and/or modify this program under the terms of the
+ * GNU General Public License version 2 as published by the Free Software
+ * Foundation.
+ *
+ * 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.
+ */
+#include <asm/io.h>
+#include <linux/dmi.h>
+#include <linux/init.h>
+#include <linux/input.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/mc146818rtc.h>
+#include <linux/module.h>
+#include <linux/preempt.h>
+#include <linux/string.h>
+#include <linux/timer.h>
+#include <linux/types.h>
+
+/*
+ * Number of attempts to read data from queue per poll;
+ * the queue can hold up to 31 entries
+ */
+#define MAX_POLL_ITERATIONS 64
+
+#define POLL_FREQUENCY 10 /* Number of polls per second */
+
+#if POLL_FREQUENCY > HZ
+#error "POLL_FREQUENCY too high"
+#endif
+
+MODULE_AUTHOR("Miloslav Trmac <mitr@volny.cz>");
+MODULE_DESCRIPTION("Wistron laptop button driver");
+MODULE_LICENSE("GPL v2");
+MODULE_VERSION("0.1");
+
+static int force; /* = 0; */
+module_param(force, bool, 0);
+MODULE_PARM_DESC(force, "Load even if computer is not in database");
+
+static char *keymap_name; /* = NULL; */
+module_param_named(keymap, keymap_name, charp, 0);
+MODULE_PARM_DESC(keymap, "Keymap name, if it can't be autodetected");
+
+ /* BIOS interface implementation */
+
+static void __iomem *bios_entry_point; /* BIOS routine entry point */
+static void __iomem *bios_code_map_base;
+static void __iomem *bios_data_map_base;
+
+static u8 cmos_address;
+
+struct regs {
+ u32 eax, ebx, ecx;
+};
+
+static void call_bios(struct regs *regs)
+{
+ unsigned long flags;
+
+ preempt_disable();
+ local_irq_save(flags);
+ asm volatile ("pushl %%ebp;"
+ "movl %7, %%ebp;"
+ "call *%6;"
+ "popl %%ebp"
+ : "=a" (regs->eax), "=b" (regs->ebx), "=c" (regs->ecx)
+ : "0" (regs->eax), "1" (regs->ebx), "2" (regs->ecx),
+ "m" (bios_entry_point), "m" (bios_data_map_base)
+ : "edx", "edi", "esi", "memory");
+ local_irq_restore(flags);
+ preempt_enable();
+}
+
+static size_t __init locate_wistron_bios(void __iomem *base)
+{
+ static const unsigned char __initdata signature[] =
+ { 0x42, 0x21, 0x55, 0x30 };
+ size_t offset;
+
+ for (offset = 0; offset < 0x10000; offset += 0x10) {
+ if (check_signature(base + offset, signature,
+ sizeof(signature)) != 0)
+ return offset;
+ }
+ return -1;
+}
+
+static int __init map_bios(void)
+{
+ void __iomem *base;
+ size_t offset;
+ u32 entry_point;
+
+ base = ioremap(0xF0000, 0x10000); /* Can't fail */
+ offset = locate_wistron_bios(base);
+ if (offset < 0) {
+ printk(KERN_ERR "wistron_btns: BIOS entry point not found\n");
+ iounmap(base);
+ return -ENODEV;
+ }
+
+ entry_point = readl(base + offset + 5);
+ printk(KERN_DEBUG
+ "wistron_btns: BIOS signature found at %p, entry point %08X\n",
+ base + offset, entry_point);
+
+ if (entry_point >= 0xF0000) {
+ bios_code_map_base = base;
+ bios_entry_point = bios_code_map_base + (entry_point & 0xFFFF);
+ } else {
+ iounmap(base);
+ bios_code_map_base = ioremap(entry_point & ~0x3FFF, 0x4000);
+ if (bios_code_map_base == NULL) {
+ printk(KERN_ERR
+ "wistron_btns: Can't map BIOS code at %08X\n",
+ entry_point & ~0x3FFF);
+ goto err;
+ }
+ bios_entry_point = bios_code_map_base + (entry_point & 0x3FFF);
+ }
+ /* The Windows driver maps 0x10000 bytes, we keep only one page... */
+ bios_data_map_base = ioremap(0x400, 0xc00);
+ if (bios_data_map_base == NULL) {
+ printk(KERN_ERR "wistron_btns: Can't map BIOS data\n");
+ goto err_code;
+ }
+ return 0;
+
+err_code:
+ iounmap(bios_code_map_base);
+err:
+ return -ENOMEM;
+}
+
+static void __exit unmap_bios(void)
+{
+ iounmap(bios_code_map_base);
+ iounmap(bios_data_map_base);
+}
+
+ /* BIOS calls */
+
+static u16 bios_pop_queue(void)
+{
+ struct regs regs;
+
+ memset(®s, 0, sizeof (regs));
+ regs.eax = 0x9610;
+ regs.ebx = 0x061C;
+ regs.ecx = 0x0000;
+ call_bios(®s);
+
+ return regs.eax;
+}
+
+static void __init bios_attach(void)
+{
+ struct regs regs;
+
+ memset(®s, 0, sizeof (regs));
+ regs.eax = 0x9610;
+ regs.ebx = 0x012E;
+ call_bios(®s);
+}
+
+static void __exit bios_detach(void)
+{
+ struct regs regs;
+
+ memset(®s, 0, sizeof (regs));
+ regs.eax = 0x9610;
+ regs.ebx = 0x002E;
+ call_bios(®s);
+}
+
+static u8 __init bios_get_cmos_address(void)
+{
+ struct regs regs;
+
+ memset(®s, 0, sizeof (regs));
+ regs.eax = 0x9610;
+ regs.ebx = 0x051C;
+ call_bios(®s);
+
+ return regs.ecx;
+}
+
+static u16 __init bios_wifi_get_default_setting(void)
+{
+ struct regs regs;
+
+ memset(®s, 0, sizeof (regs));
+ regs.eax = 0x9610;
+ regs.ebx = 0x0235;
+ call_bios(®s);
+
+ return regs.eax;
+}
+
+static void bios_wifi_set_state(int enable)
+{
+ struct regs regs;
+
+ memset(®s, 0, sizeof (regs));
+ regs.eax = 0x9610;
+ regs.ebx = enable ? 0x0135 : 0x0035;
+ call_bios(®s);
+}
+
+ /* Hardware database */
+
+struct key_entry {
+ char type; /* See KE_* below */
+ u8 code;
+ unsigned keycode; /* For KE_KEY */
+};
+
+enum { KE_END, KE_KEY, KE_WIFI };
+
+static const struct key_entry *keymap; /* = NULL; Current key map */
+static int have_wifi;
+
+static int __init dmi_matched(struct dmi_system_id *dmi)
+{
+ const struct key_entry *key;
+
+ keymap = dmi->driver_data;
+ for (key = keymap; key->type != KE_END; key++) {
+ if (key->type == KE_WIFI) {
+ have_wifi = 1;
+ break;
+ }
+ }
+ return 1;
+}
+
+static struct key_entry keymap_empty[] = {
+ { KE_END, 0 }
+};
+
+static struct key_entry keymap_fs_amilo_pro_v2000[] = {
+ { KE_KEY, 0x01, KEY_HELP },
+ { KE_KEY, 0x11, KEY_PROG1 },
+ { KE_KEY, 0x12, KEY_PROG2 },
+ { KE_WIFI, 0x30, 0 },
+ { KE_KEY, 0x31, KEY_MAIL },
+ { KE_KEY, 0x36, KEY_WWW },
+ { KE_END, 0 }
+};
+
+static struct key_entry keymap_wistron_ms2141[] = {
+ { KE_KEY, 0x11, KEY_PROG1 },
+ { KE_KEY, 0x12, KEY_PROG2 },
+ { KE_WIFI, 0x30, 0 },
+ { KE_KEY, 0x22, KEY_REWIND },
+ { KE_KEY, 0x23, KEY_FORWARD },
+ { KE_KEY, 0x24, KEY_PLAYPAUSE },
+ { KE_KEY, 0x25, KEY_STOPCD },
+ { KE_KEY, 0x31, KEY_MAIL },
+ { KE_KEY, 0x36, KEY_WWW },
+ { KE_END, 0 }
+};
+
+/*
+ * If your machine is not here (which is currently rather likely), please send
+ * a list of buttons and their key codes (reported when loading this module
+ * with force=1) and the output of dmidecode to $MODULE_AUTHOR.
+ */
+static struct dmi_system_id dmi_ids[] = {
+ {
+ .callback = dmi_matched,
+ .ident = "Fujitsu-Siemens Amilo Pro V2000",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "AMILO Pro V2000"),
+ },
+ .driver_data = keymap_fs_amilo_pro_v2000
+ },
+ { 0, }
+};
+
+static int __init select_keymap(void)
+{
+ if (keymap_name != NULL) {
+ if (strcmp (keymap_name, "1557/MS2141") == 0)
+ keymap = keymap_wistron_ms2141;
+ else {
+ printk(KERN_ERR "wistron_btns: Keymap unknown\n");
+ return -EINVAL;
+ }
+ }
+ dmi_check_system(dmi_ids);
+ if (keymap == NULL) {
+ if (!force) {
+ printk(KERN_ERR "wistron_btns: System unknown\n");
+ return -ENODEV;
+ }
+ keymap = keymap_empty;
+ }
+ return 0;
+}
+
+ /* Input layer interface */
+
+static struct input_dev input_dev = {
+ .name = "Wistron laptop buttons",
+};
+
+static void __init setup_input_dev(void)
+{
+ const struct key_entry *key;
+
+ for (key = keymap; key->type != KE_END; key++) {
+ if (key->type == KE_KEY) {
+ input_dev.evbit[LONG(EV_KEY)] = BIT(EV_KEY);
+ input_dev.keybit[LONG(key->keycode)]
+ |= BIT(key->keycode);
+ }
+ }
+
+ input_register_device(&input_dev);
+}
+
+static void report_key(unsigned keycode)
+{
+ input_report_key(&input_dev, keycode, 1);
+ input_sync(&input_dev);
+ input_report_key(&input_dev, keycode, 0);
+ input_sync(&input_dev);
+}
+
+ /* Driver core */
+
+static int wifi_enabled;
+
+static void poll_bios(unsigned long);
+
+static struct timer_list poll_timer = TIMER_INITIALIZER(poll_bios, 0, 0);
+
+static void handle_key(u8 code)
+{
+ const struct key_entry *key;
+
+ for (key = keymap; key->type != KE_END; key++) {
+ if (code == key->code) {
+ switch (key->type) {
+ case KE_KEY:
+ report_key(key->keycode);
+ break;
+
+ case KE_WIFI:
+ if (have_wifi) {
+ wifi_enabled = !wifi_enabled;
+ bios_wifi_set_state(wifi_enabled);
+ }
+ break;
+
+ case KE_END:
+ default:
+ BUG();
+ }
+ return;
+ }
+ }
+ printk(KERN_NOTICE "wistron_btns: Unknown key code %02X\n", code);
+}
+
+static void poll_bios(unsigned long discard)
+{
+ u8 qlen;
+ u16 val;
+
+ for (;;) {
+ qlen = CMOS_READ(cmos_address);
+ if (qlen == 0)
+ break;
+ val = bios_pop_queue();
+ if (val != 0 && !discard)
+ handle_key((u8)val);
+ }
+
+ mod_timer(&poll_timer, jiffies + HZ / POLL_FREQUENCY);
+}
+
+static int __init wb_module_init(void)
+{
+ int err;
+
+ err = select_keymap();
+ if (err)
+ return err;
+ err = map_bios();
+ if (err)
+ return err;
+ bios_attach();
+ cmos_address = bios_get_cmos_address();
+ if (have_wifi) {
+ switch (bios_wifi_get_default_setting()) {
+ case 0x01:
+ wifi_enabled = 0;
+ break;
+
+ case 0x03:
+ wifi_enabled = 1;
+ break;
+
+ default:
+ have_wifi = 0;
+ break;
+ }
+ if (have_wifi)
+ bios_wifi_set_state(wifi_enabled);
+ }
+
+ setup_input_dev();
+
+ poll_bios(1); /* Flush stale event queue and arm timer */
+
+ return 0;
+}
+
+static void __exit wb_module_exit(void)
+{
+ del_timer_sync(&poll_timer);
+ input_unregister_device(&input_dev);
+ bios_detach();
+ unmap_bios();
+}
+
+module_init(wb_module_init);
+module_exit(wb_module_exit);
projects / GitHub / LineageOS / android_kernel_motorola_exynos9610.git / commitdiff