A userspace app to easily read/write the EC can be found here: ftp://ftp.suse.com/pub/people/trenn/sources/ec/ec_access.c Multiple ECs are not supported, but shouldn't be hard to add as soon as the ec driver itself will support them. Signed-off-by: Thomas Renninger <trenn@xxxxxxx> CC: Alexey Starikovskiy <astarikovskiy@xxxxxxx> CC: Len Brown <lenb@xxxxxxxxxx> CC: linux-kernel@xxxxxxxxxxxxxxx CC: linux-acpi@xxxxxxxxxxxxxxx CC: platform-driver-x86@xxxxxxxxxxxxxxx --- drivers/acpi/ec_sys.c | 86 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 86 insertions(+), 0 deletions(-) diff --git a/drivers/acpi/ec_sys.c b/drivers/acpi/ec_sys.c index 834c21a..3ef9781 100644 --- a/drivers/acpi/ec_sys.c +++ b/drivers/acpi/ec_sys.c @@ -1,3 +1,13 @@ +/* + * ec_sys.c + * + * Copyright (C) 2010 SUSE Products GmbH/Novell + * Author: + * Thomas Renninger <trenn@xxxxxxx> + * + * This work is licensed under the terms of the GNU GPL, version 2. + */ + #include <linux/kernel.h> #include <linux/acpi.h> #include <linux/debugfs.h> @@ -7,12 +17,87 @@ MODULE_AUTHOR("Thomas Renninger <trenn@xxxxxxx>"); MODULE_DESCRIPTION("ACPI EC sysfs access driver"); MODULE_LICENSE("GPL"); +#define EC_SPACE_SIZE 256 + struct sysdev_class acpi_ec_sysdev_class = { .name = "ec", }; static struct dentry *acpi_ec_debugfs_dir; +static int acpi_ec_open_io(struct inode *i, struct file *f) +{ + f->private_data = i->i_private; + return 0; +} + +static ssize_t acpi_ec_read_io(struct file *f, char __user *buf, + size_t count, loff_t *off) +{ + /* Use this if support reading/writing multiple ECs exists in ec.c: + * struct acpi_ec *ec = ((struct seq_file *)f->private_data)->private; + */ + unsigned int size = EC_SPACE_SIZE; + u8 *data = (u8 *) buf; + loff_t init_off = *off; + int err = 0; + + if (*off >= size) + return 0; + if (*off + count >= size) { + size -= *off; + count = size; + } else + size = count; + + while (size) { + err = ec_read(*off, &data[*off - init_off]); + if (err) + return err; + *off += 1; + size--; + } + return count; +} + +static ssize_t acpi_ec_write_io(struct file *f, const char __user *buf, + size_t count, loff_t *off) +{ + /* Use this if support reading/writing multiple ECs exists in ec.c: + * struct acpi_ec *ec = ((struct seq_file *)f->private_data)->private; + */ + + unsigned int size = count; + loff_t init_off = *off; + u8 *data = (u8 *) buf; + int err = 0; + + if (*off >= EC_SPACE_SIZE) + return 0; + if (*off + count >= EC_SPACE_SIZE) { + size = EC_SPACE_SIZE - *off; + count = size; + } + + while (size) { + u8 byte_write = data[*off - init_off]; + err = ec_write(*off, byte_write); + if (err) + return err; + + *off += 1; + size--; + } + return count; +} + +static struct file_operations acpi_ec_io_ops = { + .owner = THIS_MODULE, + .open = acpi_ec_open_io, + .read = acpi_ec_read_io, + .write = acpi_ec_write_io, +}; + int acpi_ec_add_debugfs(struct acpi_ec *ec, unsigned int ec_device_count) { struct dentry *dev_dir; @@ -35,6 +120,7 @@ int acpi_ec_add_debugfs(struct acpi_ec *ec, unsigned int ec_device_count) debugfs_create_x32("gpe", 0444, dev_dir, (u32 *)&first_ec->gpe); debugfs_create_bool("use_global_lock", 0444, dev_dir, (u32 *)&first_ec->global_lock); + debugfs_create_file("io", 0666, dev_dir, ec, &acpi_ec_io_ops); return 0; } -- 1.6.3 -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
