| /* |
| * Copyright (C) 2012-2017 ARM Limited or its affiliates. |
| * |
| * 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 "ssi_config.h" |
| #include <linux/kernel.h> |
| #include <linux/platform_device.h> |
| #include <linux/interrupt.h> |
| #include <crypto/ctr.h> |
| #include <linux/pm_runtime.h> |
| #include "ssi_driver.h" |
| #include "ssi_sram_mgr.h" |
| #include "ssi_pm_ext.h" |
| |
| /* |
| This function should suspend the HW (if possiable), It should be implemented by |
| the driver user. |
| The reference code clears the internal SRAM to imitate lose of state. |
| */ |
| void ssi_pm_ext_hw_suspend(struct device *dev) |
| { |
| struct ssi_drvdata *drvdata = |
| (struct ssi_drvdata *)dev_get_drvdata(dev); |
| unsigned int val; |
| void __iomem *cc_base = drvdata->cc_base; |
| unsigned int sram_addr = 0; |
| |
| CC_HAL_WRITE_REGISTER(CC_REG_OFFSET(HOST_RGF, SRAM_ADDR), sram_addr); |
| |
| for (;sram_addr < SSI_CC_SRAM_SIZE ; sram_addr+=4) { |
| CC_HAL_WRITE_REGISTER(CC_REG_OFFSET(HOST_RGF, SRAM_DATA), 0x0); |
| |
| do { |
| val = CC_HAL_READ_REGISTER(CC_REG_OFFSET(HOST_RGF, SRAM_DATA_READY)); |
| } while (!(val &0x1)); |
| } |
| } |
| |
| /* |
| This function should resume the HW (if possiable).It should be implemented by |
| the driver user. |
| */ |
| void ssi_pm_ext_hw_resume(struct device *dev) |
| { |
| return; |
| } |
| |