// SPDX-License-Identifier: GPL-2.0-only /* * Panasonic HotKey and LCD brightness control driver * (C) 2004 Hiroshi Miura * (C) 2004 NTT DATA Intellilink Co. http://www.intellilink.co.jp/ * (C) YOKOTA Hiroshi * (C) 2004 David Bronaugh * (C) 2006-2008 Harald Welte * * derived from toshiba_acpi.c, Copyright (C) 2002-2004 John Belmonte * *--------------------------------------------------------------------------- * * ChangeLog: * Aug.18, 2020 Kenneth Chan * -v0.98 add platform devices for firmware brightness registers * add support for battery charging threshold (eco mode) * resolve hotkey double trigger * add write support to mute * fix sticky_key init bug * fix naming of platform files for consistency with other * modules * split MODULE_AUTHOR() by one author per macro call * replace ACPI prints with pr_*() macros * -v0.97 add support for cdpower hardware switch * -v0.96 merge Lucina's enhancement * Jan.13, 2009 Martin Lucina * - add support for optical driver power in * Y and W series * * Sep.23, 2008 Harald Welte * -v0.95 rename driver from drivers/acpi/pcc_acpi.c to * drivers/misc/panasonic-laptop.c * * Jul.04, 2008 Harald Welte * -v0.94 replace /proc interface with device attributes * support {set,get}keycode on th input device * * Jun.27, 2008 Harald Welte * -v0.92 merge with 2.6.26-rc6 input API changes * remove broken <= 2.6.15 kernel support * resolve all compiler warnings * various coding style fixes (checkpatch.pl) * add support for backlight api * major code restructuring * * Dac.28, 2007 Harald Welte * -v0.91 merge with 2.6.24-rc6 ACPI changes * * Nov.04, 2006 Hiroshi Miura * -v0.9 remove warning about section reference. * remove acpi_os_free * add /proc/acpi/pcc/brightness interface for HAL access * merge dbronaugh's enhancement * Aug.17, 2004 David Bronaugh (dbronaugh) * - Added screen brightness setting interface * Thanks to FreeBSD crew (acpi_panasonic.c) * for the ideas I needed to accomplish it * * May.29, 2006 Hiroshi Miura * -v0.8.4 follow to change keyinput structure * thanks Fabian Yamaguchi , * Jacob Bower and * Hiroshi Yokota for providing solutions. * * Oct.02, 2004 Hiroshi Miura * -v0.8.2 merge code of YOKOTA Hiroshi * . * Add sticky key mode interface. * Refactoring acpi_pcc_generate_keyinput(). * * Sep.15, 2004 Hiroshi Miura * -v0.8 Generate key input event on input subsystem. * This is based on yet another driver written by * Ryuta Nakanishi. * * Sep.10, 2004 Hiroshi Miura * -v0.7 Change proc interface functions using seq_file * facility as same as other ACPI drivers. * * Aug.28, 2004 Hiroshi Miura * -v0.6.4 Fix a silly error with status checking * * Aug.25, 2004 Hiroshi Miura * -v0.6.3 replace read_acpi_int by standard function * acpi_evaluate_integer * some clean up and make smart copyright notice. * fix return value of pcc_acpi_get_key() * fix checking return value of acpi_bus_register_driver() * * Aug.22, 2004 David Bronaugh * -v0.6.2 Add check on ACPI data (num_sifr) * Coding style cleanups, better error messages/handling * Fixed an off-by-one error in memory allocation * * Aug.21, 2004 David Bronaugh * -v0.6.1 Fix a silly error with status checking * * Aug.20, 2004 David Bronaugh * - v0.6 Correct brightness controls to reflect reality * based on information gleaned by Hiroshi Miura * and discussions with Hiroshi Miura * * Aug.10, 2004 Hiroshi Miura * - v0.5 support LCD brightness control * based on the disclosed information by MEI. * * Jul.25, 2004 Hiroshi Miura * - v0.4 first post version * add function to retrive SIFR * * Jul.24, 2004 Hiroshi Miura * - v0.3 get proper status of hotkey * * Jul.22, 2004 Hiroshi Miura * - v0.2 add HotKey handler * * Jul.17, 2004 Hiroshi Miura * - v0.1 start from toshiba_acpi driver written by John Belmonte */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include MODULE_AUTHOR("Hiroshi Miura "); MODULE_AUTHOR("David Bronaugh "); MODULE_AUTHOR("Harald Welte "); MODULE_AUTHOR("Martin Lucina "); MODULE_AUTHOR("Kenneth Chan "); MODULE_DESCRIPTION("ACPI HotKey driver for Panasonic Let's Note laptops"); MODULE_LICENSE("GPL"); #define LOGPREFIX "pcc_acpi: " /* Define ACPI PATHs */ /* Lets note hotkeys */ #define METHOD_HKEY_QUERY "HINF" #define METHOD_HKEY_SQTY "SQTY" #define METHOD_HKEY_SINF "SINF" #define METHOD_HKEY_SSET "SSET" #define METHOD_ECWR "\\_SB.ECWR" #define HKEY_NOTIFY 0x80 #define ECO_MODE_OFF 0x00 #define ECO_MODE_ON 0x80 #define ACPI_PCC_DRIVER_NAME "Panasonic Laptop Support" #define ACPI_PCC_DEVICE_NAME "Hotkey" #define ACPI_PCC_CLASS "pcc" #define ACPI_PCC_INPUT_PHYS "panasonic/hkey0" /* LCD_TYPEs: 0 = Normal, 1 = Semi-transparent ECO_MODEs: 0x03 = off, 0x83 = on */ enum SINF_BITS { SINF_NUM_BATTERIES = 0, SINF_LCD_TYPE, SINF_AC_MAX_BRIGHT, SINF_AC_MIN_BRIGHT, SINF_AC_CUR_BRIGHT, SINF_DC_MAX_BRIGHT, SINF_DC_MIN_BRIGHT, SINF_DC_CUR_BRIGHT, SINF_MUTE, SINF_RESERVED, SINF_ECO_MODE = 0x0A, SINF_CUR_BRIGHT = 0x0D, SINF_STICKY_KEY = 0x80, }; /* R1 handles SINF_AC_CUR_BRIGHT as SINF_CUR_BRIGHT, doesn't know AC state */ static int acpi_pcc_hotkey_add(struct acpi_device *device); static int acpi_pcc_hotkey_remove(struct acpi_device *device); static void acpi_pcc_hotkey_notify(struct acpi_device *device, u32 event); static const struct acpi_device_id pcc_device_ids[] = { { "MAT0012", 0}, { "MAT0013", 0}, { "MAT0018", 0}, { "MAT0019", 0}, { "", 0}, }; MODULE_DEVICE_TABLE(acpi, pcc_device_ids); #ifdef CONFIG_PM_SLEEP static int acpi_pcc_hotkey_resume(struct device *dev); #endif static SIMPLE_DEV_PM_OPS(acpi_pcc_hotkey_pm, NULL, acpi_pcc_hotkey_resume); static struct acpi_driver acpi_pcc_driver = { .name = ACPI_PCC_DRIVER_NAME, .class = ACPI_PCC_CLASS, .ids = pcc_device_ids, .ops = { .add = acpi_pcc_hotkey_add, .remove = acpi_pcc_hotkey_remove, .notify = acpi_pcc_hotkey_notify, }, .drv.pm = &acpi_pcc_hotkey_pm, }; static const struct key_entry panasonic_keymap[] = { { KE_KEY, 0, { KEY_RESERVED } }, { KE_KEY, 1, { KEY_BRIGHTNESSDOWN } }, { KE_KEY, 2, { KEY_BRIGHTNESSUP } }, { KE_KEY, 3, { KEY_DISPLAYTOGGLE } }, { KE_KEY, 4, { KEY_MUTE } }, { KE_KEY, 5, { KEY_VOLUMEDOWN } }, { KE_KEY, 6, { KEY_VOLUMEUP } }, { KE_KEY, 7, { KEY_SLEEP } }, { KE_KEY, 8, { KEY_PROG1 } }, /* Change CPU boost */ { KE_KEY, 9, { KEY_BATTERY } }, { KE_KEY, 10, { KEY_SUSPEND } }, { KE_END, 0 } }; struct pcc_acpi { acpi_handle handle; unsigned long num_sifr; int sticky_key; int eco_mode; int mute; int ac_brightness; int dc_brightness; int current_brightness; u32 *sinf; struct acpi_device *device; struct input_dev *input_dev; struct backlight_device *backlight; struct platform_device *platform; }; /* * On some Panasonic models the volume up / down / mute keys send duplicate * keypress events over the PS/2 kbd interface, filter these out. */ static bool panasonic_i8042_filter(unsigned char data, unsigned char str, struct serio *port) { static bool extended; if (str & I8042_STR_AUXDATA) return false; if (data == 0xe0) { extended = true; return true; } else if (extended) { extended = false; switch (data & 0x7f) { case 0x20: /* e0 20 / e0 a0, Volume Mute press / release */ case 0x2e: /* e0 2e / e0 ae, Volume Down press / release */ case 0x30: /* e0 30 / e0 b0, Volume Up press / release */ return true; default: /* * Report the previously filtered e0 before continuing * with the next non-filtered byte. */ serio_interrupt(port, 0xe0, 0); return false; } } return false; } /* method access functions */ static int acpi_pcc_write_sset(struct pcc_acpi *pcc, int func, int val) { union acpi_object in_objs[] = { { .integer.type = ACPI_TYPE_INTEGER, .integer.value = func, }, { .integer.type = ACPI_TYPE_INTEGER, .integer.value = val, }, }; struct acpi_object_list params = { .count = ARRAY_SIZE(in_objs), .pointer = in_objs, }; acpi_status status = AE_OK; status = acpi_evaluate_object(pcc->handle, METHOD_HKEY_SSET, ¶ms, NULL); return (status == AE_OK) ? 0 : -EIO; } static inline int acpi_pcc_get_sqty(struct acpi_device *device) { unsigned long long s; acpi_status status; status = acpi_evaluate_integer(device->handle, METHOD_HKEY_SQTY, NULL, &s); if (ACPI_SUCCESS(status)) return s; else { pr_err("evaluation error HKEY.SQTY\n"); return -EINVAL; } } static int acpi_pcc_retrieve_biosdata(struct pcc_acpi *pcc) { acpi_status status; struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; union acpi_object *hkey = NULL; int i; status = acpi_evaluate_object(pcc->handle, METHOD_HKEY_SINF, NULL, &buffer); if (ACPI_FAILURE(status)) { pr_err("evaluation error HKEY.SINF\n"); return 0; } hkey = buffer.pointer; if (!hkey || (hkey->type != ACPI_TYPE_PACKAGE)) { pr_err("Invalid HKEY.SINF\n"); status = AE_ERROR; goto end; } if (pcc->num_sifr < hkey->package.count) { pr_err("SQTY reports bad SINF length\n"); status = AE_ERROR; goto end; } for (i = 0; i < hkey->package.count; i++) { union acpi_object *element = &(hkey->package.elements[i]); if (likely(element->type == ACPI_TYPE_INTEGER)) { pcc->sinf[i] = element->integer.value; } else pr_err("Invalid HKEY.SINF data\n"); } pcc->sinf[hkey->package.count] = -1; end: kfree(buffer.pointer); return status == AE_OK; } /* backlight API interface functions */ /* This driver currently treats AC and DC brightness identical, * since we don't need to invent an interface to the core ACPI * logic to receive events in case a power supply is plugged in * or removed */ static int bl_get(struct backlight_device *bd) { struct pcc_acpi *pcc = bl_get_data(bd); if (!acpi_pcc_retrieve_biosdata(pcc)) return -EIO; return pcc->sinf[SINF_AC_CUR_BRIGHT]; } static int bl_set_status(struct backlight_device *bd) { struct pcc_acpi *pcc = bl_get_data(bd); int bright = bd->props.brightness; int rc; if (!acpi_pcc_retrieve_biosdata(pcc)) return -EIO; if (bright < pcc->sinf[SINF_AC_MIN_BRIGHT]) bright = pcc->sinf[SINF_AC_MIN_BRIGHT]; if (bright < pcc->sinf[SINF_DC_MIN_BRIGHT]) bright = pcc->sinf[SINF_DC_MIN_BRIGHT]; if (bright < pcc->sinf[SINF_AC_MIN_BRIGHT] || bright > pcc->sinf[SINF_AC_MAX_BRIGHT]) return -EINVAL; rc = acpi_pcc_write_sset(pcc, SINF_AC_CUR_BRIGHT, bright); if (rc < 0) return rc; return acpi_pcc_write_sset(pcc, SINF_DC_CUR_BRIGHT, bright); } static const struct backlight_ops pcc_backlight_ops = { .get_brightness = bl_get, .update_status = bl_set_status, }; /* returns ACPI_SUCCESS if methods to control optical drive are present */ static acpi_status check_optd_present(void) { acpi_status status = AE_OK; acpi_handle handle; status = acpi_get_handle(NULL, "\\_SB.STAT", &handle); if (ACPI_FAILURE(status)) goto out; status = acpi_get_handle(NULL, "\\_SB.FBAY", &handle); if (ACPI_FAILURE(status)) goto out; status = acpi_get_handle(NULL, "\\_SB.CDDI", &handle); if (ACPI_FAILURE(status)) goto out; out: return status; } /* get optical driver power state */ static int get_optd_power_state(void) { acpi_status status; unsigned long long state; int result; status = acpi_evaluate_integer(NULL, "\\_SB.STAT", NULL, &state); if (ACPI_FAILURE(status)) { pr_err("evaluation error _SB.STAT\n"); result = -EIO; goto out; } switch (state) { case 0: /* power off */ result = 0; break; case 0x0f: /* power on */ result = 1; break; default: result = -EIO; break; } out: return result; } /* set optical drive power state */ static int set_optd_power_state(int new_state) { int result; acpi_status status; result = get_optd_power_state(); if (result < 0) goto out; if (new_state == result) goto out; switch (new_state) { case 0: /* power off */ /* Call CDDR instead, since they both call the same method * while CDDI takes 1 arg and we are not quite sure what it is. */ status = acpi_evaluate_object(NULL, "\\_SB.CDDR", NULL, NULL); if (ACPI_FAILURE(status)) { pr_err("evaluation error _SB.CDDR\n"); result = -EIO; } break; case 1: /* power on */ status = acpi_evaluate_object(NULL, "\\_SB.FBAY", NULL, NULL); if (ACPI_FAILURE(status)) { pr_err("evaluation error _SB.FBAY\n"); result = -EIO; } break; default: result = -EINVAL; break; } out: return result; } /* sysfs user interface functions */ static ssize_t numbatt_show(struct device *dev, struct device_attribute *attr, char *buf) { struct acpi_device *acpi = to_acpi_device(dev); struct pcc_acpi *pcc = acpi_driver_data(acpi); if (!acpi_pcc_retrieve_biosdata(pcc)) return -EIO; return snprintf(buf, PAGE_SIZE, "%u\n", pcc->sinf[SINF_NUM_BATTERIES]); } static ssize_t lcdtype_show(struct device *dev, struct device_attribute *attr, char *buf) { struct acpi_device *acpi = to_acpi_device(dev); struct pcc_acpi *pcc = acpi_driver_data(acpi); if (!acpi_pcc_retrieve_biosdata(pcc)) return -EIO; return snprintf(buf, PAGE_SIZE, "%u\n", pcc->sinf[SINF_LCD_TYPE]); } static ssize_t mute_show(struct device *dev, struct device_attribute *attr, char *buf) { struct acpi_device *acpi = to_acpi_device(dev); struct pcc_acpi *pcc = acpi_driver_data(acpi); if (!acpi_pcc_retrieve_biosdata(pcc)) return -EIO; return snprintf(buf, PAGE_SIZE, "%u\n", pcc->sinf[SINF_MUTE]); } static ssize_t mute_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct acpi_device *acpi = to_acpi_device(dev); struct pcc_acpi *pcc = acpi_driver_data(acpi); int err, val; err = kstrtoint(buf, 0, &val); if (err) return err; if (val == 0 || val == 1) { acpi_pcc_write_sset(pcc, SINF_MUTE, val); pcc->mute = val; } return count; } static ssize_t sticky_key_show(struct device *dev, struct device_attribute *attr, char *buf) { struct acpi_device *acpi = to_acpi_device(dev); struct pcc_acpi *pcc = acpi_driver_data(acpi); if (!acpi_pcc_retrieve_biosdata(pcc)) return -EIO; return snprintf(buf, PAGE_SIZE, "%u\n", pcc->sticky_key); } static ssize_t sticky_key_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct acpi_device *acpi = to_acpi_device(dev); struct pcc_acpi *pcc = acpi_driver_data(acpi); int err, val; err = kstrtoint(buf, 0, &val); if (err) return err; if (val == 0 || val == 1) { acpi_pcc_write_sset(pcc, SINF_STICKY_KEY, val); pcc->sticky_key = val; } return count; } static ssize_t eco_mode_show(struct device *dev, struct device_attribute *attr, char *buf) { struct acpi_device *acpi = to_acpi_device(dev); struct pcc_acpi *pcc = acpi_driver_data(acpi); int result; if (!acpi_pcc_retrieve_biosdata(pcc)) return -EIO; switch (pcc->sinf[SINF_ECO_MODE]) { case (ECO_MODE_OFF + 3): result = 0; break; case (ECO_MODE_ON + 3): result = 1; break; default: result = -EIO; break; } return snprintf(buf, PAGE_SIZE, "%u\n", result); } static ssize_t eco_mode_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct acpi_device *acpi = to_acpi_device(dev); struct pcc_acpi *pcc = acpi_driver_data(acpi); int err, state; union acpi_object param[2]; struct acpi_object_list input; acpi_status status; param[0].type = ACPI_TYPE_INTEGER; param[0].integer.value = 0x15; param[1].type = ACPI_TYPE_INTEGER; input.count = 2; input.pointer = param; err = kstrtoint(buf, 0, &state); if (err) return err; switch (state) { case 0: param[1].integer.value = ECO_MODE_OFF; pcc->sinf[SINF_ECO_MODE] = 0; pcc->eco_mode = 0; break; case 1: param[1].integer.value = ECO_MODE_ON; pcc->sinf[SINF_ECO_MODE] = 1; pcc->eco_mode = 1; break; default: /* nothing to do */ return count; } status = acpi_evaluate_object(NULL, METHOD_ECWR, &input, NULL); if (ACPI_FAILURE(status)) { pr_err("%s evaluation failed\n", METHOD_ECWR); return -EINVAL; } return count; } static ssize_t ac_brightness_show(struct device *dev, struct device_attribute *attr, char *buf) { struct acpi_device *acpi = to_acpi_device(dev); struct pcc_acpi *pcc = acpi_driver_data(acpi); if (!acpi_pcc_retrieve_biosdata(pcc)) return -EIO; return snprintf(buf, PAGE_SIZE, "%u\n", pcc->sinf[SINF_AC_CUR_BRIGHT]); } static ssize_t ac_brightness_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct acpi_device *acpi = to_acpi_device(dev); struct pcc_acpi *pcc = acpi_driver_data(acpi); int err, val; err = kstrtoint(buf, 0, &val); if (err) return err; if (val >= 0 && val <= 255) { acpi_pcc_write_sset(pcc, SINF_AC_CUR_BRIGHT, val); pcc->ac_brightness = val; } return count; } static ssize_t dc_brightness_show(struct device *dev, struct device_attribute *attr, char *buf) { struct acpi_device *acpi = to_acpi_device(dev); struct pcc_acpi *pcc = acpi_driver_data(acpi); if (!acpi_pcc_retrieve_biosdata(pcc)) return -EIO; return snprintf(buf, PAGE_SIZE, "%u\n", pcc->sinf[SINF_DC_CUR_BRIGHT]); } static ssize_t dc_brightness_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct acpi_device *acpi = to_acpi_device(dev); struct pcc_acpi *pcc = acpi_driver_data(acpi); int err, val; err = kstrtoint(buf, 0, &val); if (err) return err; if (val >= 0 && val <= 255) { acpi_pcc_write_sset(pcc, SINF_DC_CUR_BRIGHT, val); pcc->dc_brightness = val; } return count; } static ssize_t current_brightness_show(struct device *dev, struct device_attribute *attr, char *buf) { struct acpi_device *acpi = to_acpi_device(dev); struct pcc_acpi *pcc = acpi_driver_data(acpi); if (!acpi_pcc_retrieve_biosdata(pcc)) return -EIO; return snprintf(buf, PAGE_SIZE, "%u\n", pcc->sinf[SINF_CUR_BRIGHT]); } static ssize_t current_brightness_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct acpi_device *acpi = to_acpi_device(dev); struct pcc_acpi *pcc = acpi_driver_data(acpi); int err, val; err = kstrtoint(buf, 0, &val); if (err) return err; if (val >= 0 && val <= 255) { err = acpi_pcc_write_sset(pcc, SINF_CUR_BRIGHT, val); pcc->current_brightness = val; } return count; } static ssize_t cdpower_show(struct device *dev, struct device_attribute *attr, char *buf) { return snprintf(buf, PAGE_SIZE, "%d\n", get_optd_power_state()); } static ssize_t cdpower_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { int err, val; err = kstrtoint(buf, 10, &val); if (err) return err; set_optd_power_state(val); return count; } static DEVICE_ATTR_RO(numbatt); static DEVICE_ATTR_RO(lcdtype); static DEVICE_ATTR_RW(mute); static DEVICE_ATTR_RW(sticky_key); static DEVICE_ATTR_RW(eco_mode); static DEVICE_ATTR_RW(ac_brightness); static DEVICE_ATTR_RW(dc_brightness); static DEVICE_ATTR_RW(current_brightness); static DEVICE_ATTR_RW(cdpower); static struct attribute *pcc_sysfs_entries[] = { &dev_attr_numbatt.attr, &dev_attr_lcdtype.attr, &dev_attr_mute.attr, &dev_attr_sticky_key.attr, &dev_attr_eco_mode.attr, &dev_attr_ac_brightness.attr, &dev_attr_dc_brightness.attr, &dev_attr_current_brightness.attr, &dev_attr_cdpower.attr, NULL, }; static const struct attribute_group pcc_attr_group = { .name = NULL, /* put in device directory */ .attrs = pcc_sysfs_entries, }; /* hotkey input device driver */ static int sleep_keydown_seen; static void acpi_pcc_generate_keyinput(struct pcc_acpi *pcc) { struct input_dev *hotk_input_dev = pcc->input_dev; int rc; unsigned long long result; unsigned int key; unsigned int updown; rc = acpi_evaluate_integer(pcc->handle, METHOD_HKEY_QUERY, NULL, &result); if (ACPI_FAILURE(rc)) { pr_err("error getting hotkey status\n"); return; } key = result & 0xf; updown = result & 0x80; /* 0x80 == key down; 0x00 = key up */ /* hack: some firmware sends no key down for sleep / hibernate */ if (key == 7 || key == 10) { if (updown) sleep_keydown_seen = 1; if (!sleep_keydown_seen) sparse_keymap_report_event(hotk_input_dev, key, 0x80, false); } /* * Don't report brightness key-presses if they are also reported * by the ACPI video bus. */ if ((key == 1 || key == 2) && acpi_video_handles_brightness_key_presses()) return; if (!sparse_keymap_report_event(hotk_input_dev, key, updown, false)) pr_err("Unknown hotkey event: 0x%04llx\n", result); } static void acpi_pcc_hotkey_notify(struct acpi_device *device, u32 event) { struct pcc_acpi *pcc = acpi_driver_data(device); switch (event) { case HKEY_NOTIFY: acpi_pcc_generate_keyinput(pcc); break; default: /* nothing to do */ break; } } static void pcc_optd_notify(acpi_handle handle, u32 event, void *data) { if (event != ACPI_NOTIFY_EJECT_REQUEST) return; set_optd_power_state(0); } static int pcc_register_optd_notifier(struct pcc_acpi *pcc, char *node) { acpi_status status; acpi_handle handle; status = acpi_get_handle(NULL, node, &handle); if (ACPI_SUCCESS(status)) { status = acpi_install_notify_handler(handle, ACPI_SYSTEM_NOTIFY, pcc_optd_notify, pcc); if (ACPI_FAILURE(status)) pr_err("Failed to register notify on %s\n", node); } else return -ENODEV; return 0; } static void pcc_unregister_optd_notifier(struct pcc_acpi *pcc, char *node) { acpi_status status = AE_OK; acpi_handle handle; status = acpi_get_handle(NULL, node, &handle); if (ACPI_SUCCESS(status)) { status = acpi_remove_notify_handler(handle, ACPI_SYSTEM_NOTIFY, pcc_optd_notify); if (ACPI_FAILURE(status)) pr_err("Error removing optd notify handler %s\n", node); } } static int acpi_pcc_init_input(struct pcc_acpi *pcc) { struct input_dev *input_dev; int error; input_dev = input_allocate_device(); if (!input_dev) return -ENOMEM; input_dev->name = ACPI_PCC_DRIVER_NAME; input_dev->phys = ACPI_PCC_INPUT_PHYS; input_dev->id.bustype = BUS_HOST; input_dev->id.vendor = 0x0001; input_dev->id.product = 0x0001; input_dev->id.version = 0x0100; error = sparse_keymap_setup(input_dev, panasonic_keymap, NULL); if (error) { pr_err("Unable to setup input device keymap\n"); goto err_free_dev; } error = input_register_device(input_dev); if (error) { pr_err("Unable to register input device\n"); goto err_free_dev; } pcc->input_dev = input_dev; return 0; err_free_dev: input_free_device(input_dev); return error; } /* kernel module interface */ #ifdef CONFIG_PM_SLEEP static int acpi_pcc_hotkey_resume(struct device *dev) { struct pcc_acpi *pcc; if (!dev) return -EINVAL; pcc = acpi_driver_data(to_acpi_device(dev)); if (!pcc) return -EINVAL; acpi_pcc_write_sset(pcc, SINF_MUTE, pcc->mute); acpi_pcc_write_sset(pcc, SINF_ECO_MODE, pcc->eco_mode); acpi_pcc_write_sset(pcc, SINF_STICKY_KEY, pcc->sticky_key); acpi_pcc_write_sset(pcc, SINF_AC_CUR_BRIGHT, pcc->ac_brightness); acpi_pcc_write_sset(pcc, SINF_DC_CUR_BRIGHT, pcc->dc_brightness); acpi_pcc_write_sset(pcc, SINF_CUR_BRIGHT, pcc->current_brightness); return 0; } #endif static int acpi_pcc_hotkey_add(struct acpi_device *device) { struct backlight_properties props; struct pcc_acpi *pcc; int num_sifr, result; if (!device) return -EINVAL; num_sifr = acpi_pcc_get_sqty(device); if (num_sifr < 0 || num_sifr > 255) { pr_err("num_sifr out of range"); return -ENODEV; } pcc = kzalloc(sizeof(struct pcc_acpi), GFP_KERNEL); if (!pcc) { pr_err("Couldn't allocate mem for pcc"); return -ENOMEM; } pcc->sinf = kcalloc(num_sifr + 1, sizeof(u32), GFP_KERNEL); if (!pcc->sinf) { result = -ENOMEM; goto out_hotkey; } pcc->device = device; pcc->handle = device->handle; pcc->num_sifr = num_sifr; device->driver_data = pcc; strcpy(acpi_device_name(device), ACPI_PCC_DEVICE_NAME); strcpy(acpi_device_class(device), ACPI_PCC_CLASS); result = acpi_pcc_init_input(pcc); if (result) { pr_err("Error installing keyinput handler\n"); goto out_sinf; } if (!acpi_pcc_retrieve_biosdata(pcc)) { result = -EIO; pr_err("Couldn't retrieve BIOS data\n"); goto out_input; } /* initialize backlight */ memset(&props, 0, sizeof(struct backlight_properties)); props.type = BACKLIGHT_PLATFORM; props.max_brightness = pcc->sinf[SINF_AC_MAX_BRIGHT]; pcc->backlight = backlight_device_register("panasonic", NULL, pcc, &pcc_backlight_ops, &props); if (IS_ERR(pcc->backlight)) { result = PTR_ERR(pcc->backlight); goto out_input; } /* read the initial brightness setting from the hardware */ pcc->backlight->props.brightness = pcc->sinf[SINF_AC_CUR_BRIGHT]; /* Reset initial sticky key mode since the hardware register state is not consistent */ acpi_pcc_write_sset(pcc, SINF_STICKY_KEY, 0); pcc->sticky_key = 0; pcc->eco_mode = pcc->sinf[SINF_ECO_MODE]; pcc->mute = pcc->sinf[SINF_MUTE]; pcc->ac_brightness = pcc->sinf[SINF_AC_CUR_BRIGHT]; pcc->dc_brightness = pcc->sinf[SINF_DC_CUR_BRIGHT]; pcc->current_brightness = pcc->sinf[SINF_CUR_BRIGHT]; /* add sysfs attributes */ result = sysfs_create_group(&device->dev.kobj, &pcc_attr_group); if (result) goto out_backlight; /* optical drive initialization */ if (ACPI_SUCCESS(check_optd_present())) { pcc->platform = platform_device_register_simple("panasonic", -1, NULL, 0); if (IS_ERR(pcc->platform)) { result = PTR_ERR(pcc->platform); goto out_backlight; } result = device_create_file(&pcc->platform->dev, &dev_attr_cdpower); pcc_register_optd_notifier(pcc, "\\_SB.PCI0.EHCI.ERHB.OPTD"); if (result) goto out_platform; } else { pcc->platform = NULL; } i8042_install_filter(panasonic_i8042_filter); return 0; out_platform: platform_device_unregister(pcc->platform); out_backlight: backlight_device_unregister(pcc->backlight); out_input: input_unregister_device(pcc->input_dev); out_sinf: kfree(pcc->sinf); out_hotkey: kfree(pcc); return result; } static int acpi_pcc_hotkey_remove(struct acpi_device *device) { struct pcc_acpi *pcc = acpi_driver_data(device); if (!device || !pcc) return -EINVAL; i8042_remove_filter(panasonic_i8042_filter); if (pcc->platform) { device_remove_file(&pcc->platform->dev, &dev_attr_cdpower); platform_device_unregister(pcc->platform); } pcc_unregister_optd_notifier(pcc, "\\_SB.PCI0.EHCI.ERHB.OPTD"); sysfs_remove_group(&device->dev.kobj, &pcc_attr_group); backlight_device_unregister(pcc->backlight); input_unregister_device(pcc->input_dev); kfree(pcc->sinf); kfree(pcc); return 0; } module_acpi_driver(acpi_pcc_driver);