freebsd-dev/sys/dev/drm2/drm_platform.c
Michal Meloun 02fe53a49f Import drm_patform.c, an implementation of non-PCI based attachment
for graphics drivers.
It will be used in upcoming driver for Nvidia Tegra boards.

MFC after: 1 month
2016-12-26 14:28:23 +00:00

184 lines
4.6 KiB
C

/*
* Derived from drm_pci.c
*
* Copyright 2003 José Fonseca.
* Copyright 2003 Leif Delgass.
* Copyright (c) 2009, Code Aurora Forum.
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <dev/drm2/drmP.h>
static void drm_platform_free_irq(struct drm_device *dev)
{
if (dev->irqr == NULL)
return;
bus_release_resource(dev->dev, SYS_RES_IRQ,
dev->irqrid, dev->irqr);
dev->irqr = NULL;
dev->irq = 0;
}
static const char *drm_platform_get_name(struct drm_device *dev)
{
return dev->driver->name;
}
static int drm_platform_set_busid(struct drm_device *dev, struct drm_master *master)
{
int len, ret, id;
master->unique_len = 13 + strlen(dev->driver->name);
master->unique_size = master->unique_len;
master->unique = malloc(master->unique_len + 1, DRM_MEM_DRIVER, M_NOWAIT);
if (master->unique == NULL)
return -ENOMEM;
id = 0; // XXX dev->driver->id;
/* if only a single instance of the platform device, id will be
* set to -1.. use 0 instead to avoid a funny looking bus-id:
*/
if (id == -1)
id = 0;
len = snprintf(master->unique, master->unique_len,
"platform:%s:%02d", dev->driver->name, id);
if (len > master->unique_len) {
DRM_ERROR("Unique buffer overflowed\n");
ret = -EINVAL;
goto err;
}
return 0;
err:
return ret;
}
static int drm_platform_get_irq(struct drm_device *dev)
{
if (dev->irqr)
return (dev->irq);
dev->irqr = bus_alloc_resource_any(dev->dev, SYS_RES_IRQ,
&dev->irqrid, RF_SHAREABLE);
if (!dev->irqr) {
dev_err(dev->dev, "Failed to allocate IRQ\n");
return (0);
}
dev->irq = (int) rman_get_start(dev->irqr);
return (dev->irq);
}
static struct drm_bus drm_platform_bus = {
.bus_type = DRIVER_BUS_PLATFORM,
.get_irq = drm_platform_get_irq,
.free_irq = drm_platform_free_irq,
.get_name = drm_platform_get_name,
.set_busid = drm_platform_set_busid,
};
/**
* Register.
*
* \param platdev - Platform device struture
* \return zero on success or a negative number on failure.
*
* Attempt to gets inter module "drm" information. If we are first
* then register the character device and inter module information.
* Try and register, if we fail to register, backout previous work.
*/
int drm_get_platform_dev(device_t kdev, struct drm_device *dev,
struct drm_driver *driver)
{
int ret;
DRM_DEBUG("\n");
driver->bus = &drm_platform_bus;
dev->dev = kdev;
sx_xlock(&drm_global_mutex);
ret = drm_fill_in_dev(dev, driver);
if (ret) {
printf("DRM: Fill_in_dev failed.\n");
goto err_g1;
}
if (drm_core_check_feature(dev, DRIVER_MODESET)) {
ret = drm_get_minor(dev, &dev->control, DRM_MINOR_CONTROL);
if (ret)
goto err_g1;
}
ret = drm_get_minor(dev, &dev->primary, DRM_MINOR_LEGACY);
if (ret)
goto err_g2;
if (dev->driver->load) {
ret = dev->driver->load(dev, 0);
if (ret)
goto err_g3;
}
/* setup the grouping for the legacy output */
if (drm_core_check_feature(dev, DRIVER_MODESET)) {
ret = drm_mode_group_init_legacy_group(dev,
&dev->primary->mode_group);
if (ret)
goto err_g3;
}
#ifdef FREEBSD_NOTYET
list_add_tail(&dev->driver_item, &driver->device_list);
#endif /* FREEBSD_NOTYET */
sx_xunlock(&drm_global_mutex);
DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n",
driver->name, driver->major, driver->minor, driver->patchlevel,
driver->date, dev->primary->index);
return 0;
err_g3:
drm_put_minor(&dev->primary);
err_g2:
if (drm_core_check_feature(dev, DRIVER_MODESET))
drm_put_minor(&dev->control);
err_g1:
sx_xunlock(&drm_global_mutex);
return ret;
}
EXPORT_SYMBOL(drm_get_platform_dev);