diff options
Diffstat (limited to 'pvr-source/services4/system/omap4/sgxfreq_onoff.c')
| -rw-r--r-- | pvr-source/services4/system/omap4/sgxfreq_onoff.c | 180 |
1 files changed, 180 insertions, 0 deletions
diff --git a/pvr-source/services4/system/omap4/sgxfreq_onoff.c b/pvr-source/services4/system/omap4/sgxfreq_onoff.c new file mode 100644 index 0000000..39dd3fc --- /dev/null +++ b/pvr-source/services4/system/omap4/sgxfreq_onoff.c @@ -0,0 +1,180 @@ +/* + * Copyright (C) 2012 Texas Instruments, Inc + * + * 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. + * + * 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/sysfs.h> +#include "sgxfreq.h" + +static int onoff_start(struct sgxfreq_sgx_data *data); +static void onoff_stop(void); +static void onoff_sgx_clk_on(void); +static void onoff_sgx_clk_off(void); + +static struct onoff_data { + unsigned long freq_off; + unsigned long freq_on; + struct mutex mutex; + bool sgx_clk_on; +} ood; + +static struct sgxfreq_governor onoff_gov = { + .name = "onoff", + .gov_start = onoff_start, + .gov_stop = onoff_stop, + .sgx_clk_on = onoff_sgx_clk_on, + .sgx_clk_off = onoff_sgx_clk_off, +}; + +/*********************** begin sysfs interface ***********************/ + +extern struct kobject *sgxfreq_kobj; + +static ssize_t show_freq_on(struct device *dev, struct device_attribute *attr, + char *buf) +{ + return sprintf(buf, "%lu\n", ood.freq_on); +} + +static ssize_t store_freq_on(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + int ret; + unsigned long freq; + + ret = sscanf(buf, "%lu", &freq); + if (ret != 1) + return -EINVAL; + + freq = sgxfreq_get_freq_ceil(freq); + + mutex_lock(&ood.mutex); + + ood.freq_on = freq; + if (ood.sgx_clk_on) + sgxfreq_set_freq_request(ood.freq_on); + + mutex_unlock(&ood.mutex); + + return count; +} + +static ssize_t show_freq_off(struct device *dev, struct device_attribute *attr, + char *buf) +{ + return sprintf(buf, "%lu\n", ood.freq_off); +} + +static ssize_t store_freq_off(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + int ret; + unsigned long freq; + + ret = sscanf(buf, "%lu", &freq); + if (ret != 1) + return -EINVAL; + + freq = sgxfreq_get_freq_floor(freq); + + mutex_lock(&ood.mutex); + + ood.freq_off = freq; + if (!ood.sgx_clk_on) + sgxfreq_set_freq_request(ood.freq_off); + + mutex_unlock(&ood.mutex); + + return count; +} +static DEVICE_ATTR(freq_on, 0644, show_freq_on, store_freq_on); +static DEVICE_ATTR(freq_off, 0644, show_freq_off, store_freq_off); + +static struct attribute *onoff_attributes[] = { + &dev_attr_freq_on.attr, + &dev_attr_freq_off.attr, + NULL +}; + +static struct attribute_group onoff_attr_group = { + .attrs = onoff_attributes, + .name = "onoff", +}; + +/************************ end sysfs interface ************************/ + +int onoff_init(void) +{ + int ret; + + mutex_init(&ood.mutex); + + ret = sgxfreq_register_governor(&onoff_gov); + if (ret) + return ret; + + ood.freq_off = sgxfreq_get_freq_min(); + ood.freq_on = sgxfreq_get_freq_max(); + + return 0; +} + +int onoff_deinit(void) +{ + return 0; +} + +static int onoff_start(struct sgxfreq_sgx_data *data) +{ + int ret; + + ood.sgx_clk_on = data->clk_on; + + ret = sysfs_create_group(sgxfreq_kobj, &onoff_attr_group); + if (ret) + return ret; + + if (ood.sgx_clk_on) + sgxfreq_set_freq_request(ood.freq_on); + else + sgxfreq_set_freq_request(ood.freq_off); + + return 0; +} + +static void onoff_stop(void) +{ + sysfs_remove_group(sgxfreq_kobj, &onoff_attr_group); +} + +static void onoff_sgx_clk_on(void) +{ + mutex_lock(&ood.mutex); + + ood.sgx_clk_on = true; + sgxfreq_set_freq_request(ood.freq_on); + + mutex_unlock(&ood.mutex); +} + +static void onoff_sgx_clk_off(void) +{ + mutex_lock(&ood.mutex); + + ood.sgx_clk_on = false; + sgxfreq_set_freq_request(ood.freq_off); + + mutex_unlock(&ood.mutex); +} + |