diff options
Diffstat (limited to 'drivers/staging/ccree/ssi_pm_ext.c')
| -rw-r--r-- | drivers/staging/ccree/ssi_pm_ext.c | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/drivers/staging/ccree/ssi_pm_ext.c b/drivers/staging/ccree/ssi_pm_ext.c new file mode 100644 index 0000000..f86bbab --- /dev/null +++ b/drivers/staging/ccree/ssi_pm_ext.c @@ -0,0 +1,60 @@ +/* + * 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; +} + |
