diff options
Diffstat (limited to 'drivers/platform')
| -rw-r--r-- | drivers/platform/chrome/Kconfig | 14 | ||||
| -rw-r--r-- | drivers/platform/chrome/Makefile | 7 | ||||
| -rw-r--r-- | drivers/platform/chrome/cros_ec_debugfs.c | 401 | ||||
| -rw-r--r-- | drivers/platform/chrome/cros_ec_debugfs.h | 27 | ||||
| -rw-r--r-- | drivers/platform/chrome/cros_ec_dev.c | 40 | ||||
| -rw-r--r-- | drivers/platform/chrome/cros_ec_dev.h | 6 | ||||
| -rw-r--r-- | drivers/platform/chrome/cros_ec_lightbar.c | 197 | ||||
| -rw-r--r-- | drivers/platform/chrome/cros_ec_lpc.c | 168 | ||||
| -rw-r--r-- | drivers/platform/chrome/cros_ec_lpc_mec.c | 140 | ||||
| -rw-r--r-- | drivers/platform/chrome/cros_ec_lpc_reg.c | 133 | ||||
| -rw-r--r-- | drivers/platform/chrome/cros_ec_proto.c | 116 | ||||
| -rw-r--r-- | drivers/platform/goldfish/goldfish_pipe.c | 4 | ||||
| -rw-r--r-- | drivers/platform/x86/Kconfig | 19 | ||||
| -rw-r--r-- | drivers/platform/x86/Makefile | 1 | ||||
| -rw-r--r-- | drivers/platform/x86/intel-hid.c | 40 | ||||
| -rw-r--r-- | drivers/platform/x86/intel-vbtn.c | 39 | ||||
| -rw-r--r-- | drivers/platform/x86/intel_bxtwc_tmu.c | 4 | ||||
| -rw-r--r-- | drivers/platform/x86/intel_int0002_vgpio.c | 219 | ||||
| -rw-r--r-- | drivers/platform/x86/thinkpad_acpi.c | 91 |
19 files changed, 1513 insertions, 153 deletions
diff --git a/drivers/platform/chrome/Kconfig b/drivers/platform/chrome/Kconfig index 76bdae1a93bb..0ad6e290bbda 100644 --- a/drivers/platform/chrome/Kconfig +++ b/drivers/platform/chrome/Kconfig @@ -49,7 +49,7 @@ config CROS_EC_CHARDEV config CROS_EC_LPC tristate "ChromeOS Embedded Controller (LPC)" - depends on MFD_CROS_EC && (X86 || COMPILE_TEST) + depends on MFD_CROS_EC && ACPI && (X86 || COMPILE_TEST) help If you say Y here, you get support for talking to the ChromeOS EC over an LPC bus. This uses a simple byte-level protocol with a @@ -59,6 +59,18 @@ config CROS_EC_LPC To compile this driver as a module, choose M here: the module will be called cros_ec_lpc. +config CROS_EC_LPC_MEC + bool "ChromeOS Embedded Controller LPC Microchip EC (MEC) variant" + depends on CROS_EC_LPC + default n + help + If you say Y here, a variant LPC protocol for the Microchip EC + will be used. Note that this variant is not backward compatible + with non-Microchip ECs. + + If you have a ChromeOS Embedded Controller Microchip EC variant + choose Y here. + config CROS_EC_PROTO bool help diff --git a/drivers/platform/chrome/Makefile b/drivers/platform/chrome/Makefile index 4f3462783a3c..66c345ca35fc 100644 --- a/drivers/platform/chrome/Makefile +++ b/drivers/platform/chrome/Makefile @@ -2,8 +2,11 @@ obj-$(CONFIG_CHROMEOS_LAPTOP) += chromeos_laptop.o obj-$(CONFIG_CHROMEOS_PSTORE) += chromeos_pstore.o cros_ec_devs-objs := cros_ec_dev.o cros_ec_sysfs.o \ - cros_ec_lightbar.o cros_ec_vbc.o + cros_ec_lightbar.o cros_ec_vbc.o \ + cros_ec_debugfs.o obj-$(CONFIG_CROS_EC_CHARDEV) += cros_ec_devs.o -obj-$(CONFIG_CROS_EC_LPC) += cros_ec_lpc.o +cros_ec_lpcs-objs := cros_ec_lpc.o cros_ec_lpc_reg.o +cros_ec_lpcs-$(CONFIG_CROS_EC_LPC_MEC) += cros_ec_lpc_mec.o +obj-$(CONFIG_CROS_EC_LPC) += cros_ec_lpcs.o obj-$(CONFIG_CROS_EC_PROTO) += cros_ec_proto.o obj-$(CONFIG_CROS_KBD_LED_BACKLIGHT) += cros_kbd_led_backlight.o diff --git a/drivers/platform/chrome/cros_ec_debugfs.c b/drivers/platform/chrome/cros_ec_debugfs.c new file mode 100644 index 000000000000..4cc66f405760 --- /dev/null +++ b/drivers/platform/chrome/cros_ec_debugfs.c @@ -0,0 +1,401 @@ +/* + * cros_ec_debugfs - debug logs for Chrome OS EC + * + * Copyright 2015 Google, Inc. + * + * 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, see <http://www.gnu.org/licenses/>. + */ + +#include <linux/circ_buf.h> +#include <linux/debugfs.h> +#include <linux/delay.h> +#include <linux/fs.h> +#include <linux/mfd/cros_ec.h> +#include <linux/mfd/cros_ec_commands.h> +#include <linux/mutex.h> +#include <linux/poll.h> +#include <linux/sched.h> +#include <linux/slab.h> +#include <linux/wait.h> + +#include "cros_ec_dev.h" +#include "cros_ec_debugfs.h" + +#define LOG_SHIFT 14 +#define LOG_SIZE (1 << LOG_SHIFT) +#define LOG_POLL_SEC 10 + +#define CIRC_ADD(idx, size, value) (((idx) + (value)) & ((size) - 1)) + +/* struct cros_ec_debugfs - ChromeOS EC debugging information + * + * @ec: EC device this debugfs information belongs to + * @dir: dentry for debugfs files + * @log_buffer: circular buffer for console log information + * @read_msg: preallocated EC command and buffer to read console log + * @log_mutex: mutex to protect circular buffer + * @log_wq: waitqueue for log readers + * @log_poll_work: recurring task to poll EC for new console log data + * @panicinfo_blob: panicinfo debugfs blob + */ +struct cros_ec_debugfs { + struct cros_ec_dev *ec; + struct dentry *dir; + /* EC log */ + struct circ_buf log_buffer; + struct cros_ec_command *read_msg; + struct mutex log_mutex; + wait_queue_head_t log_wq; + struct delayed_work log_poll_work; + /* EC panicinfo */ + struct debugfs_blob_wrapper panicinfo_blob; +}; + +/* + * We need to make sure that the EC log buffer on the UART is large enough, + * so that it is unlikely enough to overlow within LOG_POLL_SEC. + */ +static void cros_ec_console_log_work(struct work_struct *__work) +{ + struct cros_ec_debugfs *debug_info = + container_of(to_delayed_work(__work), + struct cros_ec_debugfs, + log_poll_work); + struct cros_ec_dev *ec = debug_info->ec; + struct circ_buf *cb = &debug_info->log_buffer; + struct cros_ec_command snapshot_msg = { + .command = EC_CMD_CONSOLE_SNAPSHOT + ec->cmd_offset, + }; + + struct ec_params_console_read_v1 *read_params = + (struct ec_params_console_read_v1 *)debug_info->read_msg->data; + uint8_t *ec_buffer = (uint8_t *)debug_info->read_msg->data; + int idx; + int buf_space; + int ret; + + ret = cros_ec_cmd_xfer(ec->ec_dev, &snapshot_msg); + if (ret < 0) { + dev_err(ec->dev, "EC communication failed\n"); + goto resched; + } + if (snapshot_msg.result != EC_RES_SUCCESS) { + dev_err(ec->dev, "EC failed to snapshot the console log\n"); + goto resched; + } + + /* Loop until we have read everything, or there's an error. */ + mutex_lock(&debug_info->log_mutex); + buf_space = CIRC_SPACE(cb->head, cb->tail, LOG_SIZE); + + while (1) { + if (!buf_space) { + dev_info_once(ec->dev, + "Some logs may have been dropped...\n"); + break; + } + + memset(read_params, '\0', sizeof(*read_params)); + read_params->subcmd = CONSOLE_READ_RECENT; + ret = cros_ec_cmd_xfer(ec->ec_dev, debug_info->read_msg); + if (ret < 0) { + dev_err(ec->dev, "EC communication failed\n"); + break; + } + if (debug_info->read_msg->result != EC_RES_SUCCESS) { + dev_err(ec->dev, + "EC failed to read the console log\n"); + break; + } + + /* If the buffer is empty, we're done here. */ + if (ret == 0 || ec_buffer[0] == '\0') + break; + + idx = 0; + while (idx < ret && ec_buffer[idx] != '\0' && buf_space > 0) { + cb->buf[cb->head] = ec_buffer[idx]; + cb->head = CIRC_ADD(cb->head, LOG_SIZE, 1); + idx++; + buf_space--; + } + + wake_up(&debug_info->log_wq); + } + + mutex_unlock(&debug_info->log_mutex); + +resched: + schedule_delayed_work(&debug_info->log_poll_work, + msecs_to_jiffies(LOG_POLL_SEC * 1000)); +} + +static int cros_ec_console_log_open(struct inode *inode, struct file *file) +{ + file->private_data = inode->i_private; + + return nonseekable_open(inode, file); +} + +static ssize_t cros_ec_console_log_read(struct file *file, char __user *buf, + size_t count, loff_t *ppos) +{ + struct cros_ec_debugfs *debug_info = file->private_data; + struct circ_buf *cb = &debug_info->log_buffer; + ssize_t ret; + + mutex_lock(&debug_info->log_mutex); + + while (!CIRC_CNT(cb->head, cb->tail, LOG_SIZE)) { + if (file->f_flags & O_NONBLOCK) { + ret = -EAGAIN; + goto error; + } + + mutex_unlock(&debug_info->log_mutex); + + ret = wait_event_interruptible(debug_info->log_wq, + CIRC_CNT(cb->head, cb->tail, LOG_SIZE)); + if (ret < 0) + return ret; + + mutex_lock(&debug_info->log_mutex); + } + + /* Only copy until the end of the circular buffer, and let userspace + * retry to get the rest of the data. + */ + ret = min_t(size_t, CIRC_CNT_TO_END(cb->head, cb->tail, LOG_SIZE), + count); + + if (copy_to_user(buf, cb->buf + cb->tail, ret)) { + ret = -EFAULT; + goto error; + } + + cb->tail = CIRC_ADD(cb->tail, LOG_SIZE, ret); + +error: + mutex_unlock(&debug_info->log_mutex); + return ret; +} + +static unsigned int cros_ec_console_log_poll(struct file *file, + poll_table *wait) +{ + struct cros_ec_debugfs *debug_info = file->private_data; + unsigned int mask = 0; + + poll_wait(file, &debug_info->log_wq, wait); + + mutex_lock(&debug_info->log_mutex); + if (CIRC_CNT(debug_info->log_buffer.head, + debug_info->log_buffer.tail, + LOG_SIZE)) + mask |= POLLIN | POLLRDNORM; + mutex_unlock(&debug_info->log_mutex); + + return mask; +} + +static int cros_ec_console_log_release(struct inode *inode, struct file *file) +{ + return 0; +} + +const struct file_operations cros_ec_console_log_fops = { + .owner = THIS_MODULE, + .open = cros_ec_console_log_open, + .read = cros_ec_console_log_read, + .llseek = no_llseek, + .poll = cros_ec_console_log_poll, + .release = cros_ec_console_log_release, +}; + +static int ec_read_version_supported(struct cros_ec_dev *ec) +{ + struct ec_params_get_cmd_versions_v1 *params; + struct ec_response_get_cmd_versions *response; + int ret; + + struct cros_ec_command *msg; + + msg = kzalloc(sizeof(*msg) + max(sizeof(*params), sizeof(*response)), + GFP_KERNEL); + if (!msg) + return 0; + + msg->command = EC_CMD_GET_CMD_VERSIONS + ec->cmd_offset; + msg->outsize = sizeof(*params); + msg->insize = sizeof(*response); + + params = (struct ec_params_get_cmd_versions_v1 *)msg->data; + params->cmd = EC_CMD_CONSOLE_READ; + response = (struct ec_response_get_cmd_versions *)msg->data; + + ret = cros_ec_cmd_xfer(ec->ec_dev, msg) >= 0 && + msg->result == EC_RES_SUCCESS && + (response->version_mask & EC_VER_MASK(1)); + + kfree(msg); + + return ret; +} + +static int cros_ec_create_console_log(struct cros_ec_debugfs *debug_info) +{ + struct cros_ec_dev *ec = debug_info->ec; + char *buf; + int read_params_size; + int read_response_size; + + if (!ec_read_version_supported(ec)) { + dev_warn(ec->dev, + "device does not support reading the console log\n"); + return 0; + } + + buf = devm_kzalloc(ec->dev, LOG_SIZE, GFP_KERNEL); + if (!buf) + return -ENOMEM; + + read_params_size = sizeof(struct ec_params_console_read_v1); + read_response_size = ec->ec_dev->max_response; + debug_info->read_msg = devm_kzalloc(ec->dev, + sizeof(*debug_info->read_msg) + + max(read_params_size, read_response_size), GFP_KERNEL); + if (!debug_info->read_msg) + return -ENOMEM; + + debug_info->read_msg->version = 1; + debug_info->read_msg->command = EC_CMD_CONSOLE_READ + ec->cmd_offset; + debug_info->read_msg->outsize = read_params_size; + debug_info->read_msg->insize = read_response_size; + + debug_info->log_buffer.buf = buf; + debug_info->log_buffer.head = 0; + debug_info->log_buffer.tail = 0; + + mutex_init(&debug_info->log_mutex); + init_waitqueue_head(&debug_info->log_wq); + + if (!debugfs_create_file("console_log", + S_IFREG | S_IRUGO, + debug_info->dir, + debug_info, + &cros_ec_console_log_fops)) + return -ENOMEM; + + INIT_DELAYED_WORK(&debug_info->log_poll_work, + cros_ec_console_log_work); + schedule_delayed_work(&debug_info->log_poll_work, 0); + + return 0; +} + +static void cros_ec_cleanup_console_log(struct cros_ec_debugfs *debug_info) +{ + if (debug_info->log_buffer.buf) { + cancel_delayed_work_sync(&debug_info->log_poll_work); + mutex_destroy(&debug_info->log_mutex); + } +} + +static int cros_ec_create_panicinfo(struct cros_ec_debugfs *debug_info) +{ + struct cros_ec_device *ec_dev = debug_info->ec->ec_dev; + int ret; + struct cros_ec_command *msg; + int insize; + + insize = ec_dev->max_response; + + msg = devm_kzalloc(debug_info->ec->dev, + sizeof(*msg) + insize, GFP_KERNEL); + if (!msg) + return -ENOMEM; + + msg->command = EC_CMD_GET_PANIC_INFO; + msg->insize = insize; + + ret = cros_ec_cmd_xfer(ec_dev, msg); + if (ret < 0) { + dev_warn(debug_info->ec->dev, "Cannot read panicinfo.\n"); + ret = 0; + goto free; + } + + /* No panic data */ + if (ret == 0) + goto free; + + debug_info->panicinfo_blob.data = msg->data; + debug_info->panicinfo_blob.size = ret; + + if (!debugfs_create_blob("panicinfo", + S_IFREG | S_IRUGO, + debug_info->dir, + &debug_info->panicinfo_blob)) { + ret = -ENOMEM; + goto free; + } + + return 0; + +free: + devm_kfree(debug_info->ec->dev, msg); + return ret; +} + +int cros_ec_debugfs_init(struct cros_ec_dev *ec) +{ + struct cros_ec_platform *ec_platform = dev_get_platdata(ec->dev); + const char *name = ec_platform->ec_name; + struct cros_ec_debugfs *debug_info; + int ret; + + debug_info = devm_kzalloc(ec->dev, sizeof(*debug_info), GFP_KERNEL); + if (!debug_info) + return -ENOMEM; + + debug_info->ec = ec; + debug_info->dir = debugfs_create_dir(name, NULL); + if (!debug_info->dir) + return -ENOMEM; + + ret = cros_ec_create_panicinfo(debug_info); + if (ret) + goto remove_debugfs; + + ret = cros_ec_create_console_log(debug_info); + if (ret) + goto remove_debugfs; + + ec->debug_info = debug_info; + + return 0; + +remove_debugfs: + debugfs_remove_recursive(debug_info->dir); + return ret; +} + +void cros_ec_debugfs_remove(struct cros_ec_dev *ec) +{ + if (!ec->debug_info) + return; + + debugfs_remove_recursive(ec->debug_info->dir); + cros_ec_cleanup_console_log(ec->debug_info); +} diff --git a/drivers/platform/chrome/cros_ec_debugfs.h b/drivers/platform/chrome/cros_ec_debugfs.h new file mode 100644 index 000000000000..1ff3a50aa1b8 --- /dev/null +++ b/drivers/platform/chrome/cros_ec_debugfs.h @@ -0,0 +1,27 @@ +/* + * Copyright 2015 Google, Inc. + * + * 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, see <http://www.gnu.org/licenses/>. + */ + +#ifndef _DRV_CROS_EC_DEBUGFS_H_ +#define _DRV_CROS_EC_DEBUGFS_H_ + +#include "cros_ec_dev.h" + +/* debugfs stuff */ +int cros_ec_debugfs_init(struct cros_ec_dev *ec); +void cros_ec_debugfs_remove(struct cros_ec_dev *ec); + +#endif /* _DRV_CROS_EC_DEBUGFS_H_ */ diff --git a/drivers/platform/chrome/cros_ec_dev.c b/drivers/platform/chrome/cros_ec_dev.c index 6aa120cd0574..cf6c4f0846b8 100644 --- a/drivers/platform/chrome/cros_ec_dev.c +++ b/drivers/platform/chrome/cros_ec_dev.c @@ -21,9 +21,11 @@ #include <linux/mfd/core.h> #include <linux/module.h> #include <linux/platform_device.h> +#include <linux/pm.h> #include <linux/slab.h> #include <linux/uaccess.h> +#include "cros_ec_debugfs.h" #include "cros_ec_dev.h" /* Device variables */ @@ -427,10 +429,16 @@ static int ec_device_probe(struct platform_device *pdev) goto failed; } + if (cros_ec_debugfs_init(ec)) + dev_warn(dev, "failed to create debugfs directory\n"); + /* check whether this EC is a sensor hub. */ if (cros_ec_check_features(ec, EC_FEATURE_MOTION_SENSE)) cros_ec_sensors_register(ec); + /* Take control of the lightbar from the EC. */ + lb_manual_suspend_ctrl(ec, 1); + return 0; failed: @@ -441,6 +449,12 @@ failed: static int ec_device_remove(struct platform_device *pdev) { struct cros_ec_dev *ec = dev_get_drvdata(&pdev->dev); + + /* Let the EC take over the lightbar again. */ + lb_manual_suspend_ctrl(ec, 0); + + cros_ec_debugfs_remove(ec); + cdev_del(&ec->cdev); device_unregister(&ec->class_dev); return 0; @@ -452,9 +466,35 @@ static const struct platform_device_id cros_ec_id[] = { }; MODULE_DEVICE_TABLE(platform, cros_ec_id); +static __maybe_unused int ec_device_suspend(struct device *dev) +{ + struct cros_ec_dev *ec = dev_get_drvdata(dev); + + lb_suspend(ec); + + return 0; +} + +static __maybe_unused int ec_device_resume(struct device *dev) +{ + struct cros_ec_dev *ec = dev_get_drvdata(dev); + + lb_resume(ec); + + return 0; +} + +static const struct dev_pm_ops cros_ec_dev_pm_ops = { +#ifdef CONFIG_PM_SLEEP + .suspend = ec_device_suspend, + .resume = ec_device_resume, +#endif +}; + static struct platform_driver cros_ec_dev_driver = { .driver = { .name = "cros-ec-ctl", + .pm = &cros_ec_dev_pm_ops, }, .probe = ec_device_probe, .remove = ec_device_remove, diff --git a/drivers/platform/chrome/cros_ec_dev.h b/drivers/platform/chrome/cros_ec_dev.h index bfd2c84c3571..45e9453608c5 100644 --- a/drivers/platform/chrome/cros_ec_dev.h +++ b/drivers/platform/chrome/cros_ec_dev.h @@ -43,4 +43,10 @@ struct cros_ec_readmem { #define CROS_EC_DEV_IOCXCMD _IOWR(CROS_EC_DEV_IOC, 0, struct cros_ec_command) #define CROS_EC_DEV_IOCRDMEM _IOWR(CROS_EC_DEV_IOC, 1, struct cros_ec_readmem) +/* Lightbar utilities */ +extern bool ec_has_lightbar(struct cros_ec_dev *ec); +extern int lb_manual_suspend_ctrl(struct cros_ec_dev *ec, uint8_t enable); +extern int lb_suspend(struct cros_ec_dev *ec); +extern int lb_resume(struct cros_ec_dev *ec); + #endif /* _CROS_EC_DEV_H_ */ diff --git a/drivers/platform/chrome/cros_ec_lightbar.c b/drivers/platform/chrome/cros_ec_lightbar.c index 8df3d447cacf..fd2b047a2748 100644 --- a/drivers/platform/chrome/cros_ec_lightbar.c +++ b/drivers/platform/chrome/cros_ec_lightbar.c @@ -38,6 +38,13 @@ /* Rate-limit the lightbar interface to prevent DoS. */ static unsigned long lb_interval_jiffies = 50 * HZ / 1000; +/* + * Whether or not we have given userspace control of the lightbar. + * If this is true, we won't do anything during suspend/resume. + */ +static bool userspace_control; +static struct cros_ec_dev *ec_with_lightbar; + static ssize_t interval_msec_show(struct device *dev, struct device_attribute *attr, char *buf) { @@ -295,7 +302,8 @@ exit: static char const *seqname[] = { "ERROR", "S5", "S3", "S0", "S5S3", "S3S0", - "S0S3", "S3S5", "STOP", "RUN", "PULSE", "TEST", "KONAMI", + "S0S3", "S3S5", "STOP", "RUN", "KONAMI", + "TAP", "PROGRAM", }; static ssize_t sequence_show(struct device *dev, @@ -340,6 +348,89 @@ exit: return ret; } +static int lb_send_empty_cmd(struct cros_ec_dev *ec, uint8_t cmd) +{ + struct ec_params_lightbar *param; + struct cros_ec_command *msg; + int ret; + + msg = alloc_lightbar_cmd_msg(ec); + if (!msg) + return -ENOMEM; + + param = (struct ec_params_lightbar *)msg->data; + param->cmd = cmd; + + ret = lb_throttle(); + if (ret) + goto error; + + ret = cros_ec_cmd_xfer(ec->ec_dev, msg); + if (ret < 0) + goto error; + if (msg->result != EC_RES_SUCCESS) { + ret = -EINVAL; + goto error; + } + ret = 0; +error: + kfree(msg); + + return ret; +} + +int lb_manual_suspend_ctrl(struct cros_ec_dev *ec, uint8_t enable) +{ + struct ec_params_lightbar *param; + struct cros_ec_command *msg; + int ret; + + if (ec != ec_with_lightbar) + return 0; + + msg = alloc_lightbar_cmd_msg(ec); + if (!msg) + return -ENOMEM; + + param = (struct ec_params_lightbar *)msg->data; + + param->cmd = LIGHTBAR_CMD_MANUAL_SUSPEND_CTRL; + param->manual_suspend_ctrl.enable = enable; + + ret = lb_throttle(); + if (ret) + goto error; + + ret = cros_ec_cmd_xfer(ec->ec_dev, msg); + if (ret < 0) + goto error; + if (msg->result != EC_RES_SUCCESS) { + ret = -EINVAL; + goto error; + } + ret = 0; +error: + kfree(msg); + + return ret; +} + +int lb_suspend(struct cros_ec_dev *ec) +{ + if (userspace_control || ec != ec_with_lightbar) + return 0; + + return lb_send_empty_cmd(ec, LIGHTBAR_CMD_SUSPEND); +} + +int lb_resume(struct cros_ec_dev *ec) +{ + if (userspace_control || ec != ec_with_lightbar) + return 0; + + return lb_send_empty_cmd(ec, LIGHTBAR_CMD_RESUME); +} + static ssize_t sequence_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { @@ -390,6 +481,93 @@ exit: return ret; } +static ssize_t program_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + int extra_bytes, max_size, ret; + struct ec_params_lightbar *param; + struct cros_ec_command *msg; + struct cros_ec_dev *ec = container_of(dev, struct cros_ec_dev, + class_dev); + + /* + * We might need to reject the program for size reasons. The EC + * enforces a maximum program size, but we also don't want to try + * and send a program that is too big for the protocol. In order + * to ensure the latter, we also need to ensure we have extra bytes + * to represent the rest of the packet. + */ + extra_bytes = sizeof(*param) - sizeof(param->set_program.data); + max_size = min(EC_LB_PROG_LEN, ec->ec_dev->max_request - extra_bytes); + if (count > max_size) { + dev_err(dev, "Program is %u bytes, too long to send (max: %u)", + (unsigned int)count, max_size); + + return -EINVAL; + } + + msg = alloc_lightbar_cmd_msg(ec); + if (!msg) + return -ENOMEM; + + ret = lb_throttle(); + if (ret) + goto exit; + + dev_info(dev, "Copying %zu byte program to EC", count); + + param = (struct ec_params_lightbar *)msg->data; + param->cmd = LIGHTBAR_CMD_SET_PROGRAM; + + param->set_program.size = count; + memcpy(param->set_program.data, buf, count); + + /* + * We need to set the message size manually or else it will use + * EC_LB_PROG_LEN. This might be too long, and the program + * is unlikely to use all of the space. + */ + msg->outsize = count + extra_bytes; + + ret = cros_ec_cmd_xfer(ec->ec_dev, msg); + if (ret < 0) + goto exit; + if (msg->result != EC_RES_SUCCESS) { + ret = -EINVAL; + goto exit; + } + + ret = count; +exit: + kfree(msg); + + return ret; +} + +static ssize_t userspace_control_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + return scnprintf(buf, PAGE_SIZE, "%d\n", userspace_control); +} + +static ssize_t userspace_control_store(struct device *dev, + struct device_attribute *attr, + const char *buf, + size_t count) +{ + bool enable; + int ret; + + ret = strtobool(buf, &enable); + if (ret < 0) + return ret; + + userspace_control = enable; + + return count; +} + /* Module initialization */ static DEVICE_ATTR_RW(interval_msec); @@ -397,15 +575,25 @@ static DEVICE_ATTR_RO(version); static DEVICE_ATTR_WO(brightness); static DEVICE_ATTR_WO(led_rgb); static DEVICE_ATTR_RW(sequence); +static DEVICE_ATTR_WO(program); +static DEVICE_ATTR_RW(userspace_control); + static struct attribute *__lb_cmds_attrs[] = { &dev_attr_interval_msec.attr, &dev_attr_version.attr, &dev_attr_brightness.attr, &dev_attr_led_rgb.attr, &dev_attr_sequence.attr, + &dev_attr_program.attr, + &dev_attr_userspace_control.attr, NULL, }; +bool ec_has_lightbar(struct cros_ec_dev *ec) +{ + return !!get_lightbar_version(ec, NULL, NULL); +} + static umode_t cros_ec_lightbar_attrs_are_visible(struct kobject *kobj, struct attribute *a, int n) { @@ -422,10 +610,11 @@ static umode_t cros_ec_lightbar_attrs_are_visible(struct kobject *kobj, return 0; /* Only instantiate this stuff if the EC has a lightbar */ - if (get_lightbar_version(ec, NULL, NULL)) + if (ec_has_lightbar(ec)) { + ec_with_lightbar = ec; return a->mode; - else - return 0; + } + return 0; } struct attribute_group cros_ec_lightbar_attr_group = { diff --git a/drivers/platform/chrome/cros_ec_lpc.c b/drivers/platform/chrome/cros_ec_lpc.c index f9a245465fd0..2b6436d1b6a4 100644 --- a/drivers/platform/chrome/cros_ec_lpc.c +++ b/drivers/platform/chrome/cros_ec_lpc.c @@ -21,24 +21,29 @@ * expensive. */ +#include <linux/acpi.h> #include <linux/dmi.h> #include <linux/delay.h> #include <linux/io.h> #include <linux/mfd/cros_ec.h> #include <linux/mfd/cros_ec_commands.h> +#include <linux/mfd/cros_ec_lpc_reg.h> #include <linux/module.h> #include <linux/platform_device.h> #include <linux/printk.h> -#define DRV_NAME "cros_ec_lpc" +#define DRV_NAME "cros_ec_lpcs" +#define ACPI_DRV_NAME "GOOG0004" static int ec_response_timed_out(void) { unsigned long one_second = jiffies + HZ; + u8 data; usleep_range(200, 300); do { - if (!(inb(EC_LPC_ADDR_HOST_CMD) & EC_LPC_STATUS_BUSY_MASK)) + if (!(cros_ec_lpc_read_bytes(EC_LPC_ADDR_HOST_CMD, 1, &data) & + EC_LPC_STATUS_BUSY_MASK)) return 0; usleep_range(100, 200); } while (time_before(jiffies, one_second)); @@ -51,21 +56,20 @@ static int cros_ec_pkt_xfer_lpc(struct cros_ec_device *ec, { struct ec_host_request *request; struct ec_host_response response; - u8 sum = 0; - int i; + u8 sum; int ret = 0; u8 *dout; ret = cros_ec_prepare_tx(ec, msg); /* Write buffer */ - for (i = 0; i < ret; i++) - outb(ec->dout[i], EC_LPC_ADDR_HOST_PACKET + i); + cros_ec_lpc_write_bytes(EC_LPC_ADDR_HOST_PACKET, ret, ec->dout); request = (struct ec_host_request *)ec->dout; /* Here we go */ - outb(EC_COMMAND_PROTOCOL_3, EC_LPC_ADDR_HOST_CMD); + sum = EC_COMMAND_PROTOCOL_3; + cros_ec_lpc_write_bytes(EC_LPC_ADDR_HOST_CMD, 1, &sum); if (ec_response_timed_out()) { dev_warn(ec->dev, "EC responsed timed out\n"); @@ -74,17 +78,15 @@ static int cros_ec_pkt_xfer_lpc(struct cros_ec_device *ec, } /* Check result */ - msg->result = inb(EC_LPC_ADDR_HOST_DATA); + msg->result = cros_ec_lpc_read_bytes(EC_LPC_ADDR_HOST_DATA, 1, &sum); ret = cros_ec_check_result(ec, msg); if (ret) goto done; /* Read back response */ dout = (u8 *)&response; - for (i = 0; i < sizeof(response); i++) { - dout[i] = inb(EC_LPC_ADDR_HOST_PACKET + i); - sum += dout[i]; - } + sum = cros_ec_lpc_read_bytes(EC_LPC_ADDR_HOST_PACKET, sizeof(response), + dout); msg->result = response.result; @@ -97,11 +99,9 @@ static int cros_ec_pkt_xfer_lpc(struct cros_ec_device *ec, } /* Read response and process checksum */ - for (i = 0; i < response.data_len; i++) { - msg->data[i] = - inb(EC_LPC_ADDR_HOST_PACKET + sizeof(response) + i); - sum += msg->data[i]; - } + sum += cros_ec_lpc_read_bytes(EC_LPC_ADDR_HOST_PACKET + + sizeof(response), response.data_len, + msg->data); if (sum) { dev_err(ec->dev, @@ -121,8 +121,7 @@ static int cros_ec_cmd_xfer_lpc(struct cros_ec_device *ec, struct cros_ec_command *msg) { struct ec_lpc_host_args args; - int csum; - int i; + u8 sum; int ret = 0; if (msg->outsize > EC_PROTO2_MAX_PARAM_SIZE || @@ -139,24 +138,20 @@ static int cros_ec_cmd_xfer_lpc(struct cros_ec_device *ec, args.data_size = msg->outsize; /* Initialize checksum */ - csum = msg->command + args.flags + - args.command_version + args.data_size; + sum = msg->command + args.flags + args.command_version + args.data_size; /* Copy data and update checksum */ - for (i = 0; i < msg->outsize; i++) { - outb(msg->data[i], EC_LPC_ADDR_HOST_PARAM + i); - csum += msg->data[i]; - } + sum += cros_ec_lpc_write_bytes(EC_LPC_ADDR_HOST_PARAM, msg->outsize, + msg->data); /* Finalize checksum and write args */ - args.checksum = csum & 0xFF; - outb(args.flags, EC_LPC_ADDR_HOST_ARGS); - outb(args.command_version, EC_LPC_ADDR_HOST_ARGS + 1); - outb(args.data_size, EC_LPC_ADDR_HOST_ARGS + 2); - outb(args.checksum, EC_LPC_ADDR_HOST_ARGS + 3); + args.checksum = sum; + cros_ec_lpc_write_bytes(EC_LPC_ADDR_HOST_ARGS, sizeof(args), + (u8 *)&args); /* Here we go */ - outb(msg->command, EC_LPC_ADDR_HOST_CMD); + sum = msg->command; + cros_ec_lpc_write_bytes(EC_LPC_ADDR_HOST_CMD, 1, &sum); if (ec_response_timed_out()) { dev_warn(ec->dev, "EC responsed timed out\n"); @@ -165,16 +160,14 @@ static int cros_ec_cmd_xfer_lpc(struct cros_ec_device *ec, } /* Check result */ - msg->result = inb(EC_LPC_ADDR_HOST_DATA); + msg->result = cros_ec_lpc_read_bytes(EC_LPC_ADDR_HOST_DATA, 1, &sum); ret = cros_ec_check_result(ec, msg); if (ret) goto done; /* Read back args */ - args.flags = inb(EC_LPC_ADDR_HOST_ARGS); - args.command_version = inb(EC_LPC_ADDR_HOST_ARGS + 1); - args.data_size = inb(EC_LPC_ADDR_HOST_ARGS + 2); - args.checksum = inb(EC_LPC_ADDR_HOST_ARGS + 3); + cros_ec_lpc_read_bytes(EC_LPC_ADDR_HOST_ARGS, sizeof(args), + (u8 *)&args); if (args.data_size > msg->insize) { dev_err(ec->dev, @@ -185,20 +178,17 @@ static int cros_ec_cmd_xfer_lpc(struct cros_ec_device *ec, } /* Start calculating response checksum */ - csum = msg->command + args.flags + - args.command_version + args.data_size; + sum = msg->command + args.flags + args.command_version + args.data_size; /* Read response and update checksum */ - for (i = 0; i < args.data_size; i++) { - msg->data[i] = inb(EC_LPC_ADDR_HOST_PARAM + i); - csum += msg->data[i]; - } + sum += cros_ec_lpc_read_bytes(EC_LPC_ADDR_HOST_PARAM, args.data_size, + msg->data); /* Verify checksum */ - if (args.checksum != (csum & 0xFF)) { + if (args.checksum != sum) { dev_err(ec->dev, "bad packet checksum, expected %02x, got %02x\n", - args.checksum, csum & 0xFF); + args.checksum, sum); ret = -EBADMSG; goto done; } @@ -222,14 +212,13 @@ static int cros_ec_lpc_readmem(struct cros_ec_device *ec, unsigned int offset, /* fixed length */ if (bytes) { - for (; cnt < bytes; i++, s++, cnt++) - *s = inb(EC_LPC_ADDR_MEMMAP + i); - return cnt; + cros_ec_lpc_read_bytes(EC_LPC_ADDR_MEMMAP + offset, bytes, s); + return bytes; } /* string */ for (; i < EC_MEMMAP_SIZE; i++, s++) { - *s = inb(EC_LPC_ADDR_MEMMAP + i); + cros_ec_lpc_read_bytes(EC_LPC_ADDR_MEMMAP + i, 1, s); cnt++; if (!*s) break; @@ -238,10 +227,23 @@ static int cros_ec_lpc_readmem(struct cros_ec_device *ec, unsigned int offset, return cnt; } +static void cros_ec_lpc_acpi_notify(acpi_handle device, u32 value, void *data) +{ + struct cros_ec_device *ec_dev = data; + + if (ec_dev->mkbp_event_supported && + cros_ec_get_next_event(ec_dev, NULL) > 0) + blocking_notifier_call_chain(&ec_dev->event_notifier, 0, + ec_dev); +} + static int cros_ec_lpc_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; + struct acpi_device *adev; + acpi_status status; struct cros_ec_device *ec_dev; + u8 buf[2]; int ret; if (!devm_request_region(dev, EC_LPC_ADDR_MEMMAP, EC_MEMMAP_SIZE, @@ -250,8 +252,8 @@ static int cros_ec_lpc_probe(struct platform_device *pdev) return -EBUSY; } - if ((inb(EC_LPC_ADDR_MEMMAP + EC_MEMMAP_ID) != 'E') || - (inb(EC_LPC_ADDR_MEMMAP + EC_MEMMAP_ID + 1) != 'C')) { + cros_ec_lpc_read_bytes(EC_LPC_ADDR_MEMMAP + EC_MEMMAP_ID, 2, buf); + if (buf[0] != 'E' || buf[1] != 'C') { dev_err(dev, "EC ID not detected\n"); return -ENODEV; } @@ -287,12 +289,33 @@ static int cros_ec_lpc_probe(struct platform_device *pdev) return ret; } + /* + * Connect a notify handler to process MKBP messages if we have a + * companion ACPI device. + */ + adev = ACPI_COMPANION(dev); + if (adev) { + status = acpi_install_notify_handler(adev->handle, + ACPI_ALL_NOTIFY, + cros_ec_lpc_acpi_notify, + ec_dev); + if (ACPI_FAILURE(status)) + dev_warn(dev, "Failed to register notifier %08x\n", + status); + } + return 0; } static int cros_ec_lpc_remove(struct platform_device *pdev) { struct cros_ec_device *ec_dev; + struct acpi_device *adev; + + adev = ACPI_COMPANION(&pdev->dev); + if (adev) + acpi_remove_notify_handler(adev->handle, ACPI_ALL_NOTIFY, + cros_ec_lpc_acpi_notify); ec_dev = platform_get_drvdata(pdev); cros_ec_remove(ec_dev); @@ -300,6 +323,12 @@ static int cros_ec_lpc_remove(struct platform_device *pdev) return 0; } +static const struct acpi_device_id cros_ec_lpc_acpi_device_ids[] = { + { ACPI_DRV_NAME, 0 }, + { } +}; +MODULE_DEVICE_TABLE(acpi, cros_ec_lpc_acpi_device_ids); + static struct dmi_system_id cros_ec_lpc_dmi_table[] __initdata = { { /* @@ -337,18 +366,36 @@ static struct dmi_system_id cros_ec_lpc_dmi_table[] __initdata = { }; MODULE_DEVICE_TABLE(dmi, cros_ec_lpc_dmi_table); +#ifdef CONFIG_PM_SLEEP +static int cros_ec_lpc_suspend(struct device *dev) +{ + struct cros_ec_device *ec_dev = dev_get_drvdata(dev); + + return cros_ec_suspend(ec_dev); +} + +static int cros_ec_lpc_resume(struct device *dev) +{ + struct cros_ec_device *ec_dev = dev_get_drvdata(dev); + + return cros_ec_resume(ec_dev); +} +#endif + +const struct dev_pm_ops cros_ec_lpc_pm_ops = { + SET_LATE_SYSTEM_SLEEP_PM_OPS(cros_ec_lpc_suspend, cros_ec_lpc_resume) +}; + static struct platform_driver cros_ec_lpc_driver = { .driver = { .name = DRV_NAME, + .acpi_match_table = cros_ec_lpc_acpi_device_ids, + .pm = &cros_ec_lpc_pm_ops, }, .probe = cros_ec_lpc_probe, .remove = cros_ec_lpc_remove, }; -static struct platform_device cros_ec_lpc_device = { - .name = DRV_NAME -}; - static int __init cros_ec_lpc_init(void) { int ret; @@ -358,18 +405,13 @@ static int __init cros_ec_lpc_init(void) return -ENODEV; } + cros_ec_lpc_reg_init(); + /* Register the driver */ ret = platform_driver_register(&cros_ec_lpc_driver); if (ret) { pr_err(DRV_NAME ": can't register driver: %d\n", ret); - return ret; - } - - /* Register the device, and it'll get hooked up automatically */ - ret = platform_device_register(&cros_ec_lpc_device); - if (ret) { - pr_err(DRV_NAME ": can't register device: %d\n", ret); - platform_driver_unregister(&cros_ec_lpc_driver); + cros_ec_lpc_reg_destroy(); return ret; } @@ -378,8 +420,8 @@ static int __init cros_ec_lpc_init(void) static void __exit cros_ec_lpc_exit(void) { - platform_device_unregister(&cros_ec_lpc_device); platform_driver_unregister(&cros_ec_lpc_driver); + cros_ec_lpc_reg_destroy(); } module_init(cros_ec_lpc_init); diff --git a/drivers/platform/chrome/cros_ec_lpc_mec.c b/drivers/platform/chrome/cros_ec_lpc_mec.c new file mode 100644 index 000000000000..2eda2c2fc210 --- /dev/null +++ b/drivers/platform/chrome/cros_ec_lpc_mec.c @@ -0,0 +1,140 @@ +/* + * cros_ec_lpc_mec - LPC variant I/O for Microchip EC + * + * Copyright (C) 2016 Google, Inc + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * 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. + * + * This driver uses the Chrome OS EC byte-level message-based protocol for + * communicating the keyboard state (which keys are pressed) from a keyboard EC + * to the AP over some bus (such as i2c, lpc, spi). The EC does debouncing, + * but everything else (including deghosting) is done here. The main + * motivation for this is to keep the EC firmware as simple as possible, since + * it cannot be easily upgraded and EC flash/IRAM space is relatively + * expensive. + */ + +#include <linux/delay.h> +#include <linux/io.h> +#include <linux/mfd/cros_ec_commands.h> +#include <linux/mfd/cros_ec_lpc_mec.h> +#include <linux/mutex.h> +#include <linux/types.h> + +/* + * This mutex must be held while accessing the EMI unit. We can't rely on the + * EC mutex because memmap data may be accessed without it being held. + */ +static struct mutex io_mutex; + +/* + * cros_ec_lpc_mec_emi_write_address + * + * Initialize EMI read / write at a given address. + * + * @addr: Starting read / write address + * @access_type: Type of access, typically 32-bit auto-increment + */ +static void cros_ec_lpc_mec_emi_write_address(u16 addr, + enum cros_ec_lpc_mec_emi_access_mode access_type) +{ + /* Address relative to start of EMI range */ + addr -= MEC_EMI_RANGE_START; + outb((addr & 0xfc) | access_type, MEC_EMI_EC_ADDRESS_B0); + outb((addr >> 8) & 0x7f, MEC_EMI_EC_ADDRESS_B1); +} + +/* + * cros_ec_lpc_io_bytes_mec - Read / write bytes to MEC EMI port + * + * @io_type: MEC_IO_READ or MEC_IO_WRITE, depending on request + * @offset: Base read / write address + * @length: Number of bytes to read / write + * @buf: Destination / source buffer + * + * @return 8-bit checksum of all bytes read / written + */ +u8 cros_ec_lpc_io_bytes_mec(enum cros_ec_lpc_mec_io_type io_type, + unsigned int offset, unsigned int length, + u8 *buf) +{ + int i = 0; + int io_addr; + u8 sum = 0; + enum cros_ec_lpc_mec_emi_access_mode access, new_access; + + /* + * Long access cannot be used on misaligned data since reading B0 loads + * the data register and writing B3 flushes. + */ + if (offset & 0x3 || length < 4) + access = ACCESS_TYPE_BYTE; + else + access = ACCESS_TYPE_LONG_AUTO_INCREMENT; + + mutex_lock(&io_mutex); + + /* Initialize I/O at desired address */ + cros_ec_lpc_mec_emi_write_address(offset, access); + + /* Skip bytes in case of misaligned offset */ + io_addr = MEC_EMI_EC_DATA_B0 + (offset & 0x3); + while (i < length) { + while (io_addr <= MEC_EMI_EC_DATA_B3) { + if (io_type == MEC_IO_READ) + buf[i] = inb(io_addr++); + else + outb(buf[i], io_addr++); + + sum += buf[i++]; + offset++; + + /* Extra bounds check in case of misaligned length */ + if (i == length) + goto done; + } + + /* + * Use long auto-increment access except for misaligned write, + * since writing B3 triggers the flush. + */ + if (length - i < 4 && io_type == MEC_IO_WRITE) + new_access = ACCESS_TYPE_BYTE; + else + new_access = ACCESS_TYPE_LONG_AUTO_INCREMENT; + + if (new_access != access || + access != ACCESS_TYPE_LONG_AUTO_INCREMENT) { + access = new_access; + cros_ec_lpc_mec_emi_write_address(offset, access); + } + + /* Access [B0, B3] on each loop pass */ + io_addr = MEC_EMI_EC_DATA_B0; + } + +done: + mutex_unlock(&io_mutex); + + return sum; +} +EXPORT_SYMBOL(cros_ec_lpc_io_bytes_mec); + +void cros_ec_lpc_mec_init(void) +{ + mutex_init(&io_mutex); +} +EXPORT_SYMBOL(cros_ec_lpc_mec_init); + +void cros_ec_lpc_mec_destroy(void) +{ + mutex_destroy(&io_mutex); +} +EXPORT_SYMBOL(cros_ec_lpc_mec_destroy); diff --git a/drivers/platform/chrome/cros_ec_lpc_reg.c b/drivers/platform/chrome/cros_ec_lpc_reg.c new file mode 100644 index 000000000000..dcc7a3e30604 --- /dev/null +++ b/drivers/platform/chrome/cros_ec_lpc_reg.c @@ -0,0 +1,133 @@ +/* + * cros_ec_lpc_reg - LPC access to the Chrome OS Embedded Controller + * + * Copyright (C) 2016 Google, Inc + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * 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. + * + * This driver uses the Chrome OS EC byte-level message-based protocol for + * communicating the keyboard state (which keys are pressed) from a keyboard EC + * to the AP over some bus (such as i2c, lpc, spi). The EC does debouncing, + * but everything else (including deghosting) is done here. The main + * motivation for this is to keep the EC firmware as simple as possible, since + * it cannot be easily upgraded and EC flash/IRAM space is relatively + * expensive. + */ + +#include <linux/io.h> +#include <linux/mfd/cros_ec.h> +#include <linux/mfd/cros_ec_commands.h> +#include <linux/mfd/cros_ec_lpc_mec.h> + +static u8 lpc_read_bytes(unsigned int offset, unsigned int length, u8 *dest) +{ + int i; + int sum = 0; + + for (i = 0; i < length; ++i) { + dest[i] = inb(offset + i); + sum += dest[i]; + } + + /* Return checksum of all bytes read */ + return sum; +} + +static u8 lpc_write_bytes(unsigned int offset, unsigned int length, u8 *msg) +{ + int i; + int sum = 0; + + for (i = 0; i < length; ++i) { + outb(msg[i], offset + i); + sum += msg[i]; + } + + /* Return checksum of all bytes written */ + return sum; +} + +#ifdef CONFIG_CROS_EC_LPC_MEC + +u8 cros_ec_lpc_read_bytes(unsigned int offset, unsigned int length, u8 *dest) +{ + if (length == 0) + return 0; + + /* Access desired range through EMI interface */ + if (offset >= MEC_EMI_RANGE_START && offset <= MEC_EMI_RANGE_END) { + /* Ensure we don't straddle EMI region */ + if (WARN_ON(offset + length - 1 > MEC_EMI_RANGE_END)) + return 0; + + return cros_ec_lpc_io_bytes_mec(MEC_IO_READ, offset, length, + dest); + } + + if (WARN_ON(offset + length > MEC_EMI_RANGE_START && + offset < MEC_EMI_RANGE_START)) + return 0; + + return lpc_read_bytes(offset, length, dest); +} + +u8 cros_ec_lpc_write_bytes(unsigned int offset, unsigned int length, u8 *msg) +{ + if (length == 0) + return 0; + + /* Access desired range through EMI interface */ + if (offset >= MEC_EMI_RANGE_START && offset <= MEC_EMI_RANGE_END) { + /* Ensure we don't straddle EMI region */ + if (WARN_ON(offset + length - 1 > MEC_EMI_RANGE_END)) + return 0; + + return cros_ec_lpc_io_bytes_mec(MEC_IO_WRITE, offset, length, + msg); + } + + if (WARN_ON(offset + length > MEC_EMI_RANGE_START && + offset < MEC_EMI_RANGE_START)) + return 0; + + return lpc_write_bytes(offset, length, msg); +} + +void cros_ec_lpc_reg_init(void) +{ + cros_ec_lpc_mec_init(); +} + +void cros_ec_lpc_reg_destroy(void) +{ + cros_ec_lpc_mec_destroy(); +} + +#else /* CONFIG_CROS_EC_LPC_MEC */ + +u8 cros_ec_lpc_read_bytes(unsigned int offset, unsigned int length, u8 *dest) +{ + return lpc_read_bytes(offset, length, dest); +} + +u8 cros_ec_lpc_write_bytes(unsigned int offset, unsigned int length, u8 *msg) +{ + return lpc_write_bytes(offset, length, msg); +} + +void cros_ec_lpc_reg_init(void) +{ +} + +void cros_ec_lpc_reg_destroy(void) +{ +} + +#endif /* CONFIG_CROS_EC_LPC_MEC */ diff --git a/drivers/platform/chrome/cros_ec_proto.c b/drivers/platform/chrome/cros_ec_proto.c index ed5dee744c74..8dfa7fcb1248 100644 --- a/drivers/platform/chrome/cros_ec_proto.c +++ b/drivers/platform/chrome/cros_ec_proto.c @@ -150,6 +150,40 @@ int cros_ec_check_result(struct cros_ec_device *ec_dev, } EXPORT_SYMBOL(cros_ec_check_result); +/* + * cros_ec_get_host_event_wake_mask + * + * Get the mask of host events that cause wake from suspend. + * + * @ec_dev: EC device to call + * @msg: message structure to use + * @mask: result when function returns >=0. + * + * LOCKING: + * the caller has ec_dev->lock mutex, or the caller knows there is + * no other command in progress. + */ +static int cros_ec_get_host_event_wake_mask(struct cros_ec_device *ec_dev, + struct cros_ec_command *msg, + uint32_t *mask) +{ + struct ec_response_host_event_mask *r; + int ret; + + msg->command = EC_CMD_HOST_EVENT_GET_WAKE_MASK; + msg->version = 0; + msg->outsize = 0; + msg->insize = sizeof(*r); + + ret = send_command(ec_dev, msg); + if (ret > 0) { + r = (struct ec_response_host_event_mask *)msg->data; + *mask = r->mask; + } + + return ret; +} + static int cros_ec_host_command_proto_query(struct cros_ec_device *ec_dev, int devidx, struct cros_ec_command *msg) @@ -235,6 +269,22 @@ static int cros_ec_host_command_proto_query_v2(struct cros_ec_device *ec_dev) return ret; } +/* + * cros_ec_get_host_command_version_mask + * + * Get the version mask of a given command. + * + * @ec_dev: EC device to call + * @msg: message structure to use + * @cmd: command to get the version of. + * @mask: result when function returns 0. + * + * @return 0 on success, error code otherwise + * + * LOCKING: + * the caller has ec_dev->lock mutex or the caller knows there is + * no other command in progress. + */ static int cros_ec_get_host_command_version_mask(struct cros_ec_device *ec_dev, u16 cmd, u32 *mask) { @@ -256,7 +306,7 @@ static int cros_ec_get_host_command_version_mask(struct cros_ec_device *ec_dev, pver = (struct ec_params_get_cmd_versions *)msg->data; pver->cmd = cmd; - ret = cros_ec_cmd_xfer(ec_dev, msg); + ret = send_command(ec_dev, msg); if (ret > 0) { rver = (struct ec_response_get_cmd_versions *)msg->data; *mask = rver->version_mask; @@ -371,6 +421,17 @@ int cros_ec_query_all(struct cros_ec_device *ec_dev) else ec_dev->mkbp_event_supported = 1; + /* + * Get host event wake mask, assume all events are wake events + * if unavailable. + */ + ret = cros_ec_get_host_event_wake_mask(ec_dev, proto_msg, + &ec_dev->host_event_wake_mask); + if (ret < 0) + ec_dev->host_event_wake_mask = U32_MAX; + + ret = 0; + exit: kfree(proto_msg); return ret; @@ -486,11 +547,54 @@ static int get_keyboard_state_event(struct cros_ec_device *ec_dev) return ec_dev->event_size; } -int cros_ec_get_next_event(struct cros_ec_device *ec_dev) +int cros_ec_get_next_event(struct cros_ec_device *ec_dev, bool *wake_event) { - if (ec_dev->mkbp_event_supported) - return get_next_event(ec_dev); - else - return get_keyboard_state_event(ec_dev); + u32 host_event; + int ret; + + if (!ec_dev->mkbp_event_supported) { + ret = get_keyboard_state_event(ec_dev); + if (ret < 0) + return ret; + + if (wake_event) + *wake_event = true; + + return ret; + } + + ret = get_next_event(ec_dev); + if (ret < 0) + return ret; + + if (wake_event) { + host_event = cros_ec_get_host_event(ec_dev); + + /* Consider non-host_event as wake event */ + *wake_event = !host_event || + !!(host_event & ec_dev->host_event_wake_mask); + } + + return ret; } EXPORT_SYMBOL(cros_ec_get_next_event); + +u32 cros_ec_get_host_event(struct cros_ec_device *ec_dev) +{ + u32 host_event; + + BUG_ON(!ec_dev->mkbp_event_supported); + + if (ec_dev->event_data.event_type != EC_MKBP_EVENT_HOST_EVENT) + return 0; + + if (ec_dev->event_size != sizeof(host_event)) { + dev_warn(ec_dev->dev, "Invalid host event size\n"); + return 0; + } + + host_event = get_unaligned_le32(&ec_dev->event_data.data.host_event); + + return host_event; +} +EXPORT_SYMBOL(cros_ec_get_host_event); diff --git a/drivers/platform/goldfish/goldfish_pipe.c b/drivers/platform/goldfish/goldfish_pipe.c index 2de1e603bd2b..0578d34eec3f 100644 --- a/drivers/platform/goldfish/goldfish_pipe.c +++ b/drivers/platform/goldfish/goldfish_pipe.c @@ -266,7 +266,7 @@ struct goldfish_pipe_dev { unsigned char __iomem *base; }; -struct goldfish_pipe_dev pipe_dev[1] = {}; +static struct goldfish_pipe_dev pipe_dev[1] = {}; static int goldfish_cmd_locked(struct goldfish_pipe *pipe, enum PipeCmdCode cmd) { @@ -704,7 +704,7 @@ static int get_free_pipe_id_locked(struct goldfish_pipe_dev *dev) /* Reallocate the array */ u32 new_capacity = 2 * dev->pipes_capacity; struct goldfish_pipe **pipes = - kcalloc(new_capacity, sizeof(*pipes), GFP_KERNEL); + kcalloc(new_capacity, sizeof(*pipes), GFP_ATOMIC); if (!pipes) return -ENOMEM; memcpy(pipes, dev->pipes, sizeof(*pipes) * dev->pipes_capacity); diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig index c30f159353fd..b04860703740 100644 --- a/drivers/platform/x86/Kconfig +++ b/drivers/platform/x86/Kconfig @@ -803,6 +803,25 @@ config INTEL_CHT_INT33FE This driver instantiates i2c-clients for these, so that standard i2c drivers for these chips can bind to the them. +config INTEL_INT0002_VGPIO + tristate "Intel ACPI INT0002 Virtual GPIO driver" + depends on GPIOLIB && ACPI + select GPIOLIB_IRQCHIP + ---help--- + Some peripherals on Bay Trail and Cherry Trail platforms signal a + Power Management Event (PME) to the Power Management Controller (PMC) + to wakeup the system. When this happens software needs to explicitly + clear the PME bus 0 status bit in the GPE0a_STS register to avoid an + IRQ storm on IRQ 9. + + This is modelled in ACPI through the INT0002 ACPI device, which is + called a "Virtual GPIO controller" in ACPI because it defines the + event handler to call when the PME triggers through _AEI and _L02 + methods as would be done for a real GPIO interrupt in ACPI. + + To compile this driver as a module, choose M here: the module will + be called intel_int0002_vgpio. + config INTEL_HID_EVENT tristate "INTEL HID Event" depends on ACPI diff --git a/drivers/platform/x86/Makefile b/drivers/platform/x86/Makefile index 6a1063edc6dc..91cec1751461 100644 --- a/drivers/platform/x86/Makefile +++ b/drivers/platform/x86/Makefile @@ -48,6 +48,7 @@ obj-$(CONFIG_TOSHIBA_BT_RFKILL) += toshiba_bluetooth.o obj-$(CONFIG_TOSHIBA_HAPS) += toshiba_haps.o obj-$(CONFIG_TOSHIBA_WMI) += toshiba-wmi.o obj-$(CONFIG_INTEL_CHT_INT33FE) += intel_cht_int33fe.o +obj-$(CONFIG_INTEL_INT0002_VGPIO) += intel_int0002_vgpio.o obj-$(CONFIG_INTEL_HID_EVENT) += intel-hid.o obj-$(CONFIG_INTEL_VBTN) += intel-vbtn.o obj-$(CONFIG_INTEL_SCU_IPC) += intel_scu_ipc.o diff --git a/drivers/platform/x86/intel-hid.c b/drivers/platform/x86/intel-hid.c index 63ba2cbd04c2..8519e0f97bdd 100644 --- a/drivers/platform/x86/intel-hid.c +++ b/drivers/platform/x86/intel-hid.c @@ -23,6 +23,7 @@ #include <linux/platform_device.h> #include <linux/input/sparse-keymap.h> #include <linux/acpi.h> +#include <linux/suspend.h> #include <acpi/acpi_bus.h> MODULE_LICENSE("GPL"); @@ -75,6 +76,7 @@ static const struct key_entry intel_array_keymap[] = { struct intel_hid_priv { struct input_dev *input_dev; struct input_dev *array; + bool wakeup_mode; }; static int intel_hid_set_enable(struct device *device, bool enable) @@ -116,23 +118,37 @@ static void intel_button_array_enable(struct device *device, bool enable) dev_warn(device, "failed to set button capability\n"); } -static int intel_hid_pl_suspend_handler(struct device *device) +static int intel_hid_pm_prepare(struct device *device) { - intel_hid_set_enable(device, false); - intel_button_array_enable(device, false); + struct intel_hid_priv *priv = dev_get_drvdata(device); + + priv->wakeup_mode = true; + return 0; +} +static int intel_hid_pl_suspend_handler(struct device *device) +{ + if (pm_suspend_via_firmware()) { + intel_hid_set_enable(device, false); + intel_button_array_enable(device, false); + } return 0; } static int intel_hid_pl_resume_handler(struct device *device) { - intel_hid_set_enable(device, true); - intel_button_array_enable(device, true); + struct intel_hid_priv *priv = dev_get_drvdata(device); + priv->wakeup_mode = false; + if (pm_resume_via_firmware()) { + intel_hid_set_enable(device, true); + intel_button_array_enable(device, true); + } return 0; } static const struct dev_pm_ops intel_hid_pl_pm_ops = { + .prepare = intel_hid_pm_prepare, .freeze = intel_hid_pl_suspend_handler, .thaw = intel_hid_pl_resume_handler, .restore = intel_hid_pl_resume_handler, @@ -186,6 +202,19 @@ static void notify_handler(acpi_handle handle, u32 event, void *context) unsigned long long ev_index; acpi_status status; + if (priv->wakeup_mode) { + /* Wake up on 5-button array events only. */ + if (event == 0xc0 || !priv->array) + return; + + if (sparse_keymap_entry_from_scancode(priv->array, event)) + pm_wakeup_hard_event(&device->dev); + else + dev_info(&device->dev, "unknown event 0x%x\n", event); + + return; + } + /* 0xC0 is for HID events, other values are for 5 button array */ if (event != 0xc0) { if (!priv->array || @@ -270,6 +299,7 @@ static int intel_hid_probe(struct platform_device *device) "failed to enable HID power button\n"); } + device_init_wakeup(&device->dev, true); return 0; err_remove_notify: diff --git a/drivers/platform/x86/intel-vbtn.c b/drivers/platform/x86/intel-vbtn.c index c2035e121ac2..61f106377661 100644 --- a/drivers/platform/x86/intel-vbtn.c +++ b/drivers/platform/x86/intel-vbtn.c @@ -23,6 +23,7 @@ #include <linux/platform_device.h> #include <linux/input/sparse-keymap.h> #include <linux/acpi.h> +#include <linux/suspend.h> #include <acpi/acpi_bus.h> MODULE_LICENSE("GPL"); @@ -46,6 +47,7 @@ static const struct key_entry intel_vbtn_keymap[] = { struct intel_vbtn_priv { struct input_dev *input_dev; + bool wakeup_mode; }; static int intel_vbtn_input_setup(struct platform_device *device) @@ -73,9 +75,15 @@ static void notify_handler(acpi_handle handle, u32 event, void *context) struct platform_device *device = context; struct intel_vbtn_priv *priv = dev_get_drvdata(&device->dev); - if (!sparse_keymap_report_event(priv->input_dev, event, 1, true)) - dev_info(&device->dev, "unknown event index 0x%x\n", - event); + if (priv->wakeup_mode) { + if (sparse_keymap_entry_from_scancode(priv->input_dev, event)) { + pm_wakeup_hard_event(&device->dev); + return; + } + } else if (sparse_keymap_report_event(priv->input_dev, event, 1, true)) { + return; + } + dev_info(&device->dev, "unknown event index 0x%x\n", event); } static int intel_vbtn_probe(struct platform_device *device) @@ -109,6 +117,7 @@ static int intel_vbtn_probe(struct platform_device *device) if (ACPI_FAILURE(status)) return -EBUSY; + device_init_wakeup(&device->dev, true); return 0; } @@ -125,10 +134,34 @@ static int intel_vbtn_remove(struct platform_device *device) return 0; } +static int intel_vbtn_pm_prepare(struct device *dev) +{ + struct intel_vbtn_priv *priv = dev_get_drvdata(dev); + + priv->wakeup_mode = true; + return 0; +} + +static int intel_vbtn_pm_resume(struct device *dev) +{ + struct intel_vbtn_priv *priv = dev_get_drvdata(dev); + + priv->wakeup_mode = false; + return 0; +} + +static const struct dev_pm_ops intel_vbtn_pm_ops = { + .prepare = intel_vbtn_pm_prepare, + .resume = intel_vbtn_pm_resume, + .restore = intel_vbtn_pm_resume, + .thaw = intel_vbtn_pm_resume, +}; + static struct platform_driver intel_vbtn_pl_driver = { .driver = { .name = "intel-vbtn", .acpi_match_table = intel_vbtn_ids, + .pm = &intel_vbtn_pm_ops, }, .probe = intel_vbtn_probe, .remove = intel_vbtn_remove, diff --git a/drivers/platform/x86/intel_bxtwc_tmu.c b/drivers/platform/x86/intel_bxtwc_tmu.c index e202abd5b0df..ea865d4ca220 100644 --- a/drivers/platform/x86/intel_bxtwc_tmu.c +++ b/drivers/platform/x86/intel_bxtwc_tmu.c @@ -92,10 +92,6 @@ static int bxt_wcove_tmu_probe(struct platform_device *pdev) } wctmu->irq = virq; - /* Enable TMU interrupts */ - regmap_update_bits(wctmu->regmap, BXTWC_MIRQLVL1, - BXTWC_MIRQLVL1_MTMU, 0); - /* Unmask TMU second level Wake & System alarm */ regmap_update_bits(wctmu->regmap, BXTWC_MTMUIRQ_REG, BXTWC_TMU_ALRM_MASK, 0); diff --git a/drivers/platform/x86/intel_int0002_vgpio.c b/drivers/platform/x86/intel_int0002_vgpio.c new file mode 100644 index 000000000000..92dc230ef5b2 --- /dev/null +++ b/drivers/platform/x86/intel_int0002_vgpio.c @@ -0,0 +1,219 @@ +/* + * Intel INT0002 "Virtual GPIO" driver + * + * Copyright (C) 2017 Hans de Goede <hdegoede@redhat.com> + * + * Loosely based on android x86 kernel code which is: + * + * Copyright (c) 2014, Intel Corporation. + * + * Author: Dyut Kumar Sil <dyut.k.sil@intel.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * Some peripherals on Bay Trail and Cherry Trail platforms signal a Power + * Management Event (PME) to the Power Management Controller (PMC) to wakeup + * the system. When this happens software needs to clear the PME bus 0 status + * bit in the GPE0a_STS register to avoid an IRQ storm on IRQ 9. + * + * This is modelled in ACPI through the INT0002 ACPI device, which is + * called a "Virtual GPIO controller" in ACPI because it defines the event + * handler to call when the PME triggers through _AEI and _L02 / _E02 + * methods as would be done for a real GPIO interrupt in ACPI. Note this + * is a hack to define an AML event handler for the PME while using existing + * ACPI mechanisms, this is not a real GPIO at all. + * + * This driver will bind to the INT0002 device, and register as a GPIO + * controller, letting gpiolib-acpi.c call the _L02 handler as it would + * for a real GPIO controller. + */ + +#include <linux/acpi.h> +#include <linux/bitmap.h> +#include <linux/gpio/driver.h> +#include <linux/interrupt.h> +#include <linux/io.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/slab.h> +#include <linux/suspend.h> + +#include <asm/cpu_device_id.h> +#include <asm/intel-family.h> + +#define DRV_NAME "INT0002 Virtual GPIO" + +/* For some reason the virtual GPIO pin tied to the GPE is numbered pin 2 */ +#define GPE0A_PME_B0_VIRT_GPIO_PIN 2 + +#define GPE0A_PME_B0_STS_BIT BIT(13) +#define GPE0A_PME_B0_EN_BIT BIT(13) +#define GPE0A_STS_PORT 0x420 +#define GPE0A_EN_PORT 0x428 + +#define ICPU(model) { X86_VENDOR_INTEL, 6, model, X86_FEATURE_ANY, } + +static const struct x86_cpu_id int0002_cpu_ids[] = { +/* + * Limit ourselves to Cherry Trail for now, until testing shows we + * need to handle the INT0002 device on Baytrail too. + * ICPU(INTEL_FAM6_ATOM_SILVERMONT1), * Valleyview, Bay Trail * + */ + ICPU(INTEL_FAM6_ATOM_AIRMONT), /* Braswell, Cherry Trail */ + {} +}; + +/* + * As this is not a real GPIO at all, but just a hack to model an event in + * ACPI the get / set functions are dummy functions. + */ + +static int int0002_gpio_get(struct gpio_chip *chip, unsigned int offset) +{ + return 0; +} + +static void int0002_gpio_set(struct gpio_chip *chip, unsigned int offset, + int value) +{ +} + +static int int0002_gpio_direction_output(struct gpio_chip *chip, + unsigned int offset, int value) +{ + return 0; +} + +static void int0002_irq_ack(struct irq_data *data) +{ + outl(GPE0A_PME_B0_STS_BIT, GPE0A_STS_PORT); +} + +static void int0002_irq_unmask(struct irq_data *data) +{ + u32 gpe_en_reg; + + gpe_en_reg = inl(GPE0A_EN_PORT); + gpe_en_reg |= GPE0A_PME_B0_EN_BIT; + outl(gpe_en_reg, GPE0A_EN_PORT); +} + +static void int0002_irq_mask(struct irq_data *data) +{ + u32 gpe_en_reg; + + gpe_en_reg = inl(GPE0A_EN_PORT); + gpe_en_reg &= ~GPE0A_PME_B0_EN_BIT; + outl(gpe_en_reg, GPE0A_EN_PORT); +} + +static irqreturn_t int0002_irq(int irq, void *data) +{ + struct gpio_chip *chip = data; + u32 gpe_sts_reg; + + gpe_sts_reg = inl(GPE0A_STS_PORT); + if (!(gpe_sts_reg & GPE0A_PME_B0_STS_BIT)) + return IRQ_NONE; + + generic_handle_irq(irq_find_mapping(chip->irqdomain, + GPE0A_PME_B0_VIRT_GPIO_PIN)); + + pm_system_wakeup(); + + return IRQ_HANDLED; +} + +static struct irq_chip int0002_irqchip = { + .name = DRV_NAME, + .irq_ack = int0002_irq_ack, + .irq_mask = int0002_irq_mask, + .irq_unmask = int0002_irq_unmask, +}; + +static int int0002_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + const struct x86_cpu_id *cpu_id; + struct gpio_chip *chip; + int irq, ret; + + /* Menlow has a different INT0002 device? <sigh> */ + cpu_id = x86_match_cpu(int0002_cpu_ids); + if (!cpu_id) + return -ENODEV; + + irq = platform_get_irq(pdev, 0); + if (irq < 0) { + dev_err(dev, "Error getting IRQ: %d\n", irq); + return irq; + } + + chip = devm_kzalloc(dev, sizeof(*chip), GFP_KERNEL); + if (!chip) + return -ENOMEM; + + chip->label = DRV_NAME; + chip->parent = dev; + chip->owner = THIS_MODULE; + chip->get = int0002_gpio_get; + chip->set = int0002_gpio_set; + chip->direction_input = int0002_gpio_get; + chip->direction_output = int0002_gpio_direction_output; + chip->base = -1; + chip->ngpio = GPE0A_PME_B0_VIRT_GPIO_PIN + 1; + chip->irq_need_valid_mask = true; + + ret = devm_gpiochip_add_data(&pdev->dev, chip, NULL); + if (ret) { + dev_err(dev, "Error adding gpio chip: %d\n", ret); + return ret; + } + + bitmap_clear(chip->irq_valid_mask, 0, GPE0A_PME_B0_VIRT_GPIO_PIN); + + /* + * We manually request the irq here instead of passing a flow-handler + * to gpiochip_set_chained_irqchip, because the irq is shared. + */ + ret = devm_request_irq(dev, irq, int0002_irq, + IRQF_SHARED | IRQF_NO_THREAD, "INT0002", chip); + if (ret) { + dev_err(dev, "Error requesting IRQ %d: %d\n", irq, ret); + return ret; + } + + ret = gpiochip_irqchip_add(chip, &int0002_irqchip, 0, handle_edge_irq, + IRQ_TYPE_NONE); + if (ret) { + dev_err(dev, "Error adding irqchip: %d\n", ret); + return ret; + } + + gpiochip_set_chained_irqchip(chip, &int0002_irqchip, irq, NULL); + + return 0; +} + +static const struct acpi_device_id int0002_acpi_ids[] = { + { "INT0002", 0 }, + { }, +}; +MODULE_DEVICE_TABLE(acpi, int0002_acpi_ids); + +static struct platform_driver int0002_driver = { + .driver = { + .name = DRV_NAME, + .acpi_match_table = int0002_acpi_ids, + }, + .probe = int0002_probe, +}; + +module_platform_driver(int0002_driver); + +MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>"); +MODULE_DESCRIPTION("Intel INT0002 Virtual GPIO driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c index cab115bece15..b22573131e53 100644 --- a/drivers/platform/x86/thinkpad_acpi.c +++ b/drivers/platform/x86/thinkpad_acpi.c @@ -1437,25 +1437,20 @@ static int tpacpi_rfk_procfs_write(const enum tpacpi_rfk_id id, char *buf) */ /* interface_version --------------------------------------------------- */ -static ssize_t tpacpi_driver_interface_version_show( - struct device_driver *drv, - char *buf) +static ssize_t interface_version_show(struct device_driver *drv, char *buf) { return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION); } - -static DRIVER_ATTR(interface_version, S_IRUGO, - tpacpi_driver_interface_version_show, NULL); +static DRIVER_ATTR_RO(interface_version); /* debug_level --------------------------------------------------------- */ -static ssize_t tpacpi_driver_debug_show(struct device_driver *drv, - char *buf) +static ssize_t debug_level_show(struct device_driver *drv, char *buf) { return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level); } -static ssize_t tpacpi_driver_debug_store(struct device_driver *drv, - const char *buf, size_t count) +static ssize_t debug_level_store(struct device_driver *drv, const char *buf, + size_t count) { unsigned long t; @@ -1466,34 +1461,28 @@ static ssize_t tpacpi_driver_debug_store(struct device_driver *drv, return count; } - -static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO, - tpacpi_driver_debug_show, tpacpi_driver_debug_store); +static DRIVER_ATTR_RW(debug_level); /* version ------------------------------------------------------------- */ -static ssize_t tpacpi_driver_version_show(struct device_driver *drv, - char *buf) +static ssize_t version_show(struct device_driver *drv, char *buf) { return snprintf(buf, PAGE_SIZE, "%s v%s\n", TPACPI_DESC, TPACPI_VERSION); } - -static DRIVER_ATTR(version, S_IRUGO, - tpacpi_driver_version_show, NULL); +static DRIVER_ATTR_RO(version); /* --------------------------------------------------------------------- */ #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES /* wlsw_emulstate ------------------------------------------------------ */ -static ssize_t tpacpi_driver_wlsw_emulstate_show(struct device_driver *drv, - char *buf) +static ssize_t wlsw_emulstate_show(struct device_driver *drv, char *buf) { return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate); } -static ssize_t tpacpi_driver_wlsw_emulstate_store(struct device_driver *drv, - const char *buf, size_t count) +static ssize_t wlsw_emulstate_store(struct device_driver *drv, const char *buf, + size_t count) { unsigned long t; @@ -1507,22 +1496,16 @@ static ssize_t tpacpi_driver_wlsw_emulstate_store(struct device_driver *drv, return count; } - -static DRIVER_ATTR(wlsw_emulstate, S_IWUSR | S_IRUGO, - tpacpi_driver_wlsw_emulstate_show, - tpacpi_driver_wlsw_emulstate_store); +static DRIVER_ATTR_RW(wlsw_emulstate); /* bluetooth_emulstate ------------------------------------------------- */ -static ssize_t tpacpi_driver_bluetooth_emulstate_show( - struct device_driver *drv, - char *buf) +static ssize_t bluetooth_emulstate_show(struct device_driver *drv, char *buf) { return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate); } -static ssize_t tpacpi_driver_bluetooth_emulstate_store( - struct device_driver *drv, - const char *buf, size_t count) +static ssize_t bluetooth_emulstate_store(struct device_driver *drv, + const char *buf, size_t count) { unsigned long t; @@ -1533,22 +1516,16 @@ static ssize_t tpacpi_driver_bluetooth_emulstate_store( return count; } - -static DRIVER_ATTR(bluetooth_emulstate, S_IWUSR | S_IRUGO, - tpacpi_driver_bluetooth_emulstate_show, - tpacpi_driver_bluetooth_emulstate_store); +static DRIVER_ATTR_RW(bluetooth_emulstate); /* wwan_emulstate ------------------------------------------------- */ -static ssize_t tpacpi_driver_wwan_emulstate_show( - struct device_driver *drv, - char *buf) +static ssize_t wwan_emulstate_show(struct device_driver *drv, char *buf) { return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate); } -static ssize_t tpacpi_driver_wwan_emulstate_store( - struct device_driver *drv, - const char *buf, size_t count) +static ssize_t wwan_emulstate_store(struct device_driver *drv, const char *buf, + size_t count) { unsigned long t; @@ -1559,22 +1536,16 @@ static ssize_t tpacpi_driver_wwan_emulstate_store( return count; } - -static DRIVER_ATTR(wwan_emulstate, S_IWUSR | S_IRUGO, - tpacpi_driver_wwan_emulstate_show, - tpacpi_driver_wwan_emulstate_store); +static DRIVER_ATTR_RW(wwan_emulstate); /* uwb_emulstate ------------------------------------------------- */ -static ssize_t tpacpi_driver_uwb_emulstate_show( - struct device_driver *drv, - char *buf) +static ssize_t uwb_emulstate_show(struct device_driver *drv, char *buf) { return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate); } -static ssize_t tpacpi_driver_uwb_emulstate_store( - struct device_driver *drv, - const char *buf, size_t count) +static ssize_t uwb_emulstate_store(struct device_driver *drv, const char *buf, + size_t count) { unsigned long t; @@ -1585,10 +1556,7 @@ static ssize_t tpacpi_driver_uwb_emulstate_store( return count; } - -static DRIVER_ATTR(uwb_emulstate, S_IWUSR | S_IRUGO, - tpacpi_driver_uwb_emulstate_show, - tpacpi_driver_uwb_emulstate_store); +static DRIVER_ATTR_RW(uwb_emulstate); #endif /* --------------------------------------------------------------------- */ @@ -8565,14 +8533,13 @@ static ssize_t fan_fan2_input_show(struct device *dev, static DEVICE_ATTR(fan2_input, S_IRUGO, fan_fan2_input_show, NULL); /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */ -static ssize_t fan_fan_watchdog_show(struct device_driver *drv, - char *buf) +static ssize_t fan_watchdog_show(struct device_driver *drv, char *buf) { return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval); } -static ssize_t fan_fan_watchdog_store(struct device_driver *drv, - const char *buf, size_t count) +static ssize_t fan_watchdog_store(struct device_driver *drv, const char *buf, + size_t count) { unsigned long t; @@ -8589,9 +8556,7 @@ static ssize_t fan_fan_watchdog_store(struct device_driver *drv, return count; } - -static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO, - fan_fan_watchdog_show, fan_fan_watchdog_store); +static DRIVER_ATTR_RW(fan_watchdog); /* --------------------------------------------------------------------- */ static struct attribute *fan_attributes[] = { |