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- /*
- * XRP: Linux device driver for Xtensa Remote Processing
- *
- * Copyright (c) 2015 - 2017 Cadence Design Systems, Inc.
- *
- * 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 you can use and distribute this file under the terms of
- * the GNU General Public License version 2 or later.
- */
- #include <linux/version.h>
- #include <linux/atomic.h>
- #include <linux/acpi.h>
- #include <linux/completion.h>
- #include <linux/delay.h>
- #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 16, 0)
- #include <linux/dma-mapping.h>
- #else
- #include <linux/dma-direct.h>
- #endif
- #include <linux/firmware.h>
- #include <linux/fs.h>
- #include <linux/hashtable.h>
- #include <linux/highmem.h>
- #include <linux/idr.h>
- #include <linux/interrupt.h>
- #include <linux/io.h>
- #include <linux/kernel.h>
- #include <linux/module.h>
- #include <linux/of.h>
- #include <linux/of_address.h>
- #include <linux/of_device.h>
- #include <linux/of_reserved_mem.h>
- #include <linux/platform_device.h>
- #include <linux/pm_runtime.h>
- #include <linux/property.h>
- #include <linux/sched.h>
- #include <linux/slab.h>
- #include <linux/sort.h>
- #include <asm/mman.h>
- #include <linux/mman.h>
- #include <asm/uaccess.h>
- #include "xrp_cma_alloc.h"
- #include "xrp_firmware.h"
- #include "xrp_hw.h"
- #include "xrp_internal.h"
- #include "xrp_kernel_defs.h"
- #include "xrp_kernel_dsp_interface.h"
- #include "xrp_private_alloc.h"
- #define DRIVER_NAME "xrp_hw_com"
- struct xrp_hw_common_drvdata {
- phys_addr_t sys_reg_phys;
- void __iomem *sys_regs;
- size_t sys_reg_size;
- struct mutex lock;
- };
- static struct xrp_hw_common_drvdata *hw_drvdata = NULL;
- #define XRP_REG_RESET (0x28)
- #define DSP0_RESET_BIT_MASK (0x1<<8)
- #define DSP1_RESET_BIT_MASK (0x1<<12)
- int xrp_set_reset_reg(int dsp_id)
- {
- uint32_t bit_mask = dsp_id==0?DSP0_RESET_BIT_MASK
- :DSP1_RESET_BIT_MASK;
- pr_debug("%s,reset\n", __func__);
- if(!hw_drvdata)
- {
- pr_debug("%s hw_drvdata is NULL \n",__func__);
- return -1;
- }
- mutex_lock(&hw_drvdata->lock);
- uint32_t old_value = __raw_readl(hw_drvdata->sys_regs+XRP_REG_RESET);
- pr_debug("%s,reset reg:%x\n",__func__,old_value);
- __raw_writel(old_value^bit_mask,hw_drvdata->sys_regs+XRP_REG_RESET);
- udelay(10000);
- __raw_writel(old_value,hw_drvdata->sys_regs+XRP_REG_RESET);
- mutex_unlock(&hw_drvdata->lock);
- return 0;
- }
- EXPORT_SYMBOL(xrp_set_reset_reg);
- static const struct of_device_id xrp_hw_common_of_match[] = {
- {
- .compatible = "thead,dsp-hw-common",
- }, {},
- };
- // MODULE_DEVICE_TABLE(of, xrp_hw_common_of_match);
- static int xrp_hw_common_probe(struct platform_device *pdev)
- {
- long ret = -EINVAL;
- struct resource *mem;
- hw_drvdata =
- devm_kzalloc(&pdev->dev, sizeof(*hw_drvdata), GFP_KERNEL);
- if (!hw_drvdata)
- return -ENOMEM;
- mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!mem) {
- return -ENODEV;
- }
- hw_drvdata->sys_reg_phys = mem->start;
- hw_drvdata->sys_reg_size =mem->end-mem->start;
- hw_drvdata->sys_regs = devm_ioremap_resource(&pdev->dev, mem);
- pr_debug("%s,sys_reg_phys:%lx,sys_regs:%lx,size:%x\n", __func__,
- hw_drvdata->sys_reg_phys,hw_drvdata->sys_regs,hw_drvdata->sys_reg_size);
- mutex_init(&hw_drvdata->lock);
- return 0;
- }
- static int xrp_hw_common_remove(struct platform_device *pdev)
- {
- return 0;
- }
- static struct platform_driver xrp_hw_common_driver = {
- .probe = xrp_hw_common_probe,
- .remove = xrp_hw_common_remove,
- .driver = {
- .name = DRIVER_NAME,
- .of_match_table = of_match_ptr( xrp_hw_common_of_match),
- },
- };
- module_platform_driver(xrp_hw_common_driver);
- MODULE_AUTHOR("T-HEAD");
- MODULE_DESCRIPTION("XRP: Linux device driver for Xtensa Remote Processing");
- MODULE_LICENSE("Dual MIT/GPL");
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