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aspeed/sdmc: Allow writes to unprotected registers 

A subset of registers are not protected by the lock behaviour, so allow
unconditionally writing to those.

Signed-off-by: Joel Stanley <joel@jms.id.au>
Message-Id: <20200819100956.2216690-18-clg@kaod.org>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
This commit is contained in:
Joel Stanley 2020-09-01 14:21:51 +02:00 committed by Cédric Le Goater
parent 14c179541b
commit 57de884d55
1 changed files with 27 additions and 0 deletions
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27
hw/misc/aspeed_sdmc.c
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@ -33,15 +33,28 @@
/* Configuration Register */
#define R_CONF (0x04 / 4)
/* Interrupt control/status */
#define R_ISR (0x50 / 4)
/* Control/Status Register #1 (ast2500) */
#define R_STATUS1 (0x60 / 4)
#define PHY_BUSY_STATE BIT(0)
#define PHY_PLL_LOCK_STATUS BIT(4)
/* Reserved */
#define R_MCR6C (0x6c / 4)
#define R_ECC_TEST_CTRL (0x70 / 4)
#define ECC_TEST_FINISHED BIT(12)
#define ECC_TEST_FAIL BIT(13)
#define R_TEST_START_LEN (0x74 / 4)
#define R_TEST_FAIL_DQ (0x78 / 4)
#define R_TEST_INIT_VAL (0x7c / 4)
#define R_DRAM_SW (0x88 / 4)
#define R_DRAM_TIME (0x8c / 4)
#define R_ECC_ERR_INJECT (0xb4 / 4)
/*
* Configuration register Ox4 (for Aspeed AST2400 SOC)
*
@ -449,6 +462,20 @@ static uint32_t aspeed_2600_sdmc_compute_conf(AspeedSDMCState *s, uint32_t data)
static void aspeed_2600_sdmc_write(AspeedSDMCState *s, uint32_t reg,
uint32_t data)
{
/* Unprotected registers */
switch (reg) {
case R_ISR:
case R_MCR6C:
case R_TEST_START_LEN:
case R_TEST_FAIL_DQ:
case R_TEST_INIT_VAL:
case R_DRAM_SW:
case R_DRAM_TIME:
case R_ECC_ERR_INJECT:
s->regs[reg] = data;
return;
}
if (s->regs[R_PROT] == PROT_HARDLOCKED) {
qemu_log_mask(LOG_GUEST_ERROR, "%s: SDMC is locked until system reset!\n",
__func__);