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/*
* Remote Processor machine-specific module for OMAP3
*
* Copyright (C) 2010 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, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*
*/
#include <linux/kernel.h>
#include <linux/clk.h>
#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/io.h>
#include <plat/remoteproc.h>
#include <plat/dmtimer.h>
#include <plat/omap_device.h>
#include <plat/omap_hwmod.h>
static inline int proc44x_start(struct device *dev, u32 start_addr)
{
struct platform_device *pdev = to_platform_device(dev);
struct omap_rproc *obj = (struct omap_rproc *)platform_get_drvdata(
to_platform_device(dev));
int ret = 0;
/* Enable the Timer that would be used by co-processor for HIB/WD*/
if (obj->timer_hib_id >= 0) {
obj->dmtimer =
omap_dm_timer_request_specific(obj->timer_hib_id);
if (!obj->dmtimer) {
ret = -EBUSY;
goto err_start;
}
omap_dm_timer_set_int_enable(obj->dmtimer,
OMAP_TIMER_INT_OVERFLOW);
omap_dm_timer_set_source(obj->dmtimer, OMAP_TIMER_SRC_SYS_CLK);
}
/* Enable the Timer that would be used by co-processor as Clock*/
if (obj->timer_clk_id >= 0) {
obj->dmtimer_clk =
omap_dm_timer_request_specific(obj->timer_clk_id);
if (!obj->dmtimer_clk) {
ret = -EBUSY;
goto err_start;
}
omap_dm_timer_set_source(obj->dmtimer_clk,
OMAP_TIMER_SRC_SYS_CLK);
}
ret = omap_device_enable(pdev);
if (ret)
goto err_start;
obj->state = OMAP_RPROC_RUNNING;
return 0;
err_start:
dev_err(dev, "%s error 0x%x\n", __func__, ret);
return ret;
}
static inline int proc44x_stop(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct omap_rproc *obj = (struct omap_rproc *)platform_get_drvdata(
to_platform_device(dev));
int ret = 0;
if (obj->state == OMAP_RPROC_RUNNING) {
ret = omap_device_shutdown(pdev);
if (ret)
dev_err(dev, "%s err 0x%x\n", __func__, ret);
}
if (obj->dmtimer) {
omap_dm_timer_free(obj->dmtimer);
obj->dmtimer = NULL;
}
if (obj->dmtimer_clk) {
omap_dm_timer_free(obj->dmtimer_clk);
obj->dmtimer_clk = NULL;
}
obj->state = OMAP_RPROC_STOPPED;
return ret;
}
static inline int proc44x_sleep(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct omap_rproc *obj = (struct omap_rproc *)platform_get_drvdata(
to_platform_device(dev));
int ret = 0;
if (obj->state == OMAP_RPROC_RUNNING) {
ret = omap_device_shutdown(pdev);
if (ret)
dev_err(dev, "%s err 0x%x\n", __func__, ret);
if (obj->dmtimer)
omap_dm_timer_stop(obj->dmtimer);
if (obj->dmtimer_clk)
omap_dm_timer_stop(obj->dmtimer_clk);
}
obj->state = OMAP_RPROC_HIBERNATING;
return ret;
}
static inline int proc44x_wakeup(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct omap_rproc *obj = (struct omap_rproc *)platform_get_drvdata(
to_platform_device(dev));
int ret = 0;
if (obj->dmtimer)
omap_dm_timer_start(obj->dmtimer);
if (obj->dmtimer_clk)
omap_dm_timer_start(obj->dmtimer_clk);
ret = omap_device_enable(pdev);
if (ret)
goto err_start;
obj->state = OMAP_RPROC_RUNNING;
return 0;
err_start:
dev_err(dev, "%s error 0x%x\n", __func__, ret);
return ret;
}
static inline int omap4_rproc_get_state(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct omap_device *odev = to_omap_device(pdev);
return odev->_state;
}
static struct omap_rproc_ops omap4_ducati0_ops = {
.start = proc44x_start,
.stop = proc44x_stop,
.sleep = proc44x_sleep,
.wakeup = proc44x_wakeup,
.get_state = omap4_rproc_get_state,
};
static struct omap_rproc_ops omap4_ducati1_ops = {
.start = proc44x_start,
.stop = proc44x_stop,
.sleep = proc44x_sleep,
.wakeup = proc44x_wakeup,
.get_state = omap4_rproc_get_state,
};
static struct omap_rproc_ops omap4_tesla_ops = {
.start = proc44x_start,
.stop = proc44x_stop,
.sleep = proc44x_sleep,
.wakeup = proc44x_wakeup,
.get_state = omap4_rproc_get_state,
};
static struct omap_rproc_platform_data omap4_rproc_data[] = {
{
.name = "tesla",
.ops = &omap4_tesla_ops,
.oh_name = "dsp_c0",
.timer_clk_id = 5,
.timer_hib_id = -1,
},
{
.name = "ducati-proc0",
.ops = &omap4_ducati0_ops,
.oh_name = "ipu_c0",
.timer_clk_id = 4,
#ifdef CONFIG_SYSLINK_IPU_SELF_HIBERNATION
.timer_hib_id = 3,
#else
.timer_hib_id = -1,
#endif
},
{
.name = "ducati-proc1",
.ops = &omap4_ducati1_ops,
.oh_name = "ipu_c1",
.timer_clk_id = 9,
.timer_hib_id = -1,
},
};
static struct omap_device_pm_latency omap_rproc_latency[] = {
{
.deactivate_func = omap_device_idle_hwmods,
.activate_func = omap_device_enable_hwmods,
.deactivate_lat = 1,
.activate_lat = 1,
},
};
struct omap_rproc_platform_data *omap4_get_rproc_data(void)
{
return omap4_rproc_data;
}
#define NR_RPROC_DEVICES ARRAY_SIZE(omap4_rproc_data)
static struct omap_device *omap4_rproc_pdev[NR_RPROC_OMAP4_DEVICES];
static int __init omap4_rproc_init(void)
{
struct omap_hwmod *oh;
struct omap_device_pm_latency *ohl;
char *oh_name, *pdev_name;
int ohl_cnt = 0, i;
int rproc_data_size;
struct omap_rproc_platform_data *rproc_data;
pdev_name = "omap-remoteproc";
ohl = omap_rproc_latency;
ohl_cnt = ARRAY_SIZE(omap_rproc_latency);
rproc_data = omap4_get_rproc_data();
rproc_data_size = NR_RPROC_OMAP4_DEVICES;
for (i = 0; i < rproc_data_size; i++) {
oh_name = rproc_data[i].oh_name;
oh = omap_hwmod_lookup(oh_name);
if (!oh) {
pr_err("%s: could not look up %s\n", __func__, oh_name);
continue;
}
omap4_rproc_pdev[i] = omap_device_build(pdev_name, i, oh,
&rproc_data[i],
sizeof(struct omap_rproc_platform_data),
ohl, ohl_cnt, false);
WARN(IS_ERR(omap4_rproc_pdev[i]), "Could not build omap_device"
"for %s %s\n", pdev_name, oh_name);
}
return 0;
}
module_init(omap4_rproc_init);
static void __exit omap4_rproc_exit(void)
{
}
module_exit(omap4_rproc_exit);
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("OMAP4 Remote Processor module");
MODULE_AUTHOR("Ohad Ben-Cohen <ohad@wizery.com>");
MODULE_AUTHOR("Hari Kanigeri <h-kanigeri2@ti.com>");
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