123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156 |
- /*!
- *****************************************************************************
- *
- * @File vha_plat_dt_example.c
- * ---------------------------------------------------------------------------
- *
- * Copyright (c) Imagination Technologies Ltd.
- *
- * The contents of this file are subject to the MIT license as set out below.
- *
- * 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 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 OR COPYRIGHT HOLDERS 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.
- *
- * Alternatively, the contents of this file may be used under the terms of the
- * GNU General Public License Version 2 ("GPL")in which case the provisions of
- * GPL are applicable instead of those above.
- *
- * If you wish to allow use of your version of this file only under the terms
- * of GPL, and not to allow others to use your version of this file under the
- * terms of the MIT license, indicate your decision by deleting the provisions
- * above and replace them with the notice and other provisions required by GPL
- * as set out in the file called "GPLHEADER" included in this distribution. If
- * you do not delete the provisions above, a recipient may use your version of
- * this file under the terms of either the MIT license or GPL.
- *
- * This License is also included in this distribution in the file called
- * "MIT_COPYING".
- *
- *****************************************************************************/
- #include <linux/module.h>
- #include <linux/gfp.h>
- #include <linux/device.h>
- #include <linux/dma-mapping.h>
- #include <linux/of.h>
- #include <img_mem_man.h>
- #include "vha_plat.h"
- #include "vha_plat_dt.h"
- const struct of_device_id vha_plat_dt_of_ids[] = {
- { .compatible = VHA_PLAT_DT_OF_ID },
- { }
- };
- static struct heap_config example_heap_configs[] = {
- {
- .type = IMG_MEM_HEAP_TYPE_UNIFIED,
- .options.unified = {
- .gfp_type = GFP_KERNEL | __GFP_ZERO,
- },
- .to_dev_addr = NULL,
- },
- {
- .type = IMG_MEM_HEAP_TYPE_DMABUF,
- .to_dev_addr = NULL,
- },
- {
- .type = IMG_MEM_HEAP_TYPE_ANONYMOUS,
- .to_dev_addr = NULL,
- },
- };
- /*
- * IO hooks.
- * NOTE: customer may want to use spinlock to avoid
- * problems with multi threaded IO access
- */
- uint64_t vha_plat_read64(void *addr)
- {
- return readq((volatile void __iomem *)addr);
- }
- void vha_plat_write64(void *addr, uint64_t val)
- {
- writeq(val, (volatile void __iomem *)addr);
- }
- int vha_plat_dt_hw_init(struct platform_device *pdev)
- {
- struct device *dev = &pdev->dev;
- int ret;
- uint64_t dma_mask;
- dev_dbg(dev, "%s dma_get_mask : %#llx\n", __func__, dma_get_mask(dev));
- if (dev->dma_mask) {
- dev_info(dev, "%s dev->dma_mask : %p : %#llx\n",
- __func__, dev->dma_mask, *dev->dma_mask);
- } else {
- dev_info(dev, "%s mask unset, setting coherent\n", __func__);
- dev->dma_mask = &dev->coherent_dma_mask;
- }
- /* Try alternative dma_mask setting from device tree */
- if (!of_property_read_u64(pdev->dev.of_node, "dma-mask",
- (uint64_t *)&dma_mask)) {
- dev_info(dev, "%s forcing custom mask from DT : %#llx\n",
- __func__, dma_mask);
- } else {
- /* If alternative mask not defined in
- * DT -> "dma-mask" property, use the default one (32bit) */
- dma_mask = dma_get_mask(dev);
- }
- ret = dma_set_mask(dev, dma_mask);
- if (ret) {
- dev_err(dev, "%s failed to set dma mask\n", __func__);
- return ret;
- }
- /* Put any vendor related code:
- * get clock domain, voltage regulator, set clock rate, etc */
- return 0;
- }
- /* return platform global heaps */
- void vha_plat_dt_get_heaps(struct heap_config **heap_configs, int *num_heaps)
- {
- *heap_configs = example_heap_configs;
- *num_heaps = sizeof(example_heap_configs)/sizeof(struct heap_config);
- }
- void vha_plat_dt_hw_destroy(struct platform_device *pdev)
- {
- /* Put any vendor related code:
- * put clock domain, voltage regulator, etc */
- }
- int vha_plat_dt_hw_suspend(struct platform_device *pdev)
- {
- /* This is the place where vendor specific code shall be called:
- * eg. turn off voltage regulator/disable power domain */
- return 0;
- }
- int vha_plat_dt_hw_resume(struct platform_device *pdev)
- {
- /* This is the place where vendor specific code shall be called:
- * eg. turn on voltage regulator/enable power domain */
- return 0;
- }
- MODULE_DEVICE_TABLE(of, vha_plat_dt_of_ids);
|