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crypto: ccree - check that cryptocell reset completed

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In case of driver probe and pm resume we need to check that the cryptocell
hardware reset cycle is completed. during the reset cycle that Cryptocell
provide read only access to the APB interface which allows to verify
through the CC registers that the reset is completed. Until reset
completion we assume that any write/crypto operation is blocked.

Signed-off-by: Ofir Drang <ofir.drang@arm.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Ofir Drang
2019-06-17 11:46:28 +03:00
committed by Herbert Xu
parent 0b970d5477
commit d84f6269ce
4 changed files with 43 additions and 1 deletions
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3
drivers/crypto/ccree/cc_driver.h
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@@ -67,6 +67,8 @@ enum cc_std_body {
#define CC_SECURITY_DISABLED_MASK BIT(CC_SECURITY_DISABLED_VALUE_BIT_SHIFT)
#define CC_NVM_IS_IDLE_MASK BIT(CC_NVM_IS_IDLE_VALUE_BIT_SHIFT)
#define AXIM_MON_COMP_VALUE GENMASK(CC_AXIM_MON_COMP_VALUE_BIT_SIZE + \
CC_AXIM_MON_COMP_VALUE_BIT_SHIFT, \
CC_AXIM_MON_COMP_VALUE_BIT_SHIFT)
@@ -216,6 +218,7 @@ static inline void dump_byte_array(const char *name, const u8 *the_array,
__dump_byte_array(name, the_array, size);
}
bool cc_wait_for_reset_completion(struct cc_drvdata *drvdata);
int init_cc_regs(struct cc_drvdata *drvdata, bool is_probe);
void fini_cc_regs(struct cc_drvdata *drvdata);
int cc_clk_on(struct cc_drvdata *drvdata);