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hw: m25p80: add tests for write protect (WP# and SRWD bit)

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Signed-off-by: Iris Chen <irischenlj@fb.com>
Message-Id: <20220624183016.2125264-1-irischenlj@fb.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
This commit is contained in:
Iris Chen 2022-06-30 09:21:13 +02:00 committed by Cédric Le Goater
parent 2fa22a0f60
commit 1de51272bf
1 changed files with 62 additions and 0 deletions
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62
tests/qtest/aspeed_smc-test.c
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@ -56,7 +56,9 @@ enum {
BULK_ERASE = 0xc7,
READ = 0x03,
PP = 0x02,
WRSR = 0x1,
WREN = 0x6,
SRWD = 0x80,
RESET_ENABLE = 0x66,
RESET_MEMORY = 0x99,
EN_4BYTE_ADDR = 0xB7,
@ -441,6 +443,64 @@ static void test_read_status_reg(void)
flash_reset();
}
static void test_status_reg_write_protection(void)
{
uint8_t r;
spi_conf(CONF_ENABLE_W0);
/* default case: WP# is high and SRWD is low -> status register writable */
spi_ctrl_start_user();
writeb(ASPEED_FLASH_BASE, WREN);
/* test ability to write SRWD */
writeb(ASPEED_FLASH_BASE, WRSR);
writeb(ASPEED_FLASH_BASE, SRWD);
writeb(ASPEED_FLASH_BASE, RDSR);
r = readb(ASPEED_FLASH_BASE);
spi_ctrl_stop_user();
g_assert_cmphex(r & SRWD, ==, SRWD);
/* WP# high and SRWD high -> status register writable */
spi_ctrl_start_user();
writeb(ASPEED_FLASH_BASE, WREN);
/* test ability to write SRWD */
writeb(ASPEED_FLASH_BASE, WRSR);
writeb(ASPEED_FLASH_BASE, 0);
writeb(ASPEED_FLASH_BASE, RDSR);
r = readb(ASPEED_FLASH_BASE);
spi_ctrl_stop_user();
g_assert_cmphex(r & SRWD, ==, 0);
/* WP# low and SRWD low -> status register writable */
qtest_set_irq_in(global_qtest,
"/machine/soc/fmc/ssi.0/child[0]", "WP#", 0, 0);
spi_ctrl_start_user();
writeb(ASPEED_FLASH_BASE, WREN);
/* test ability to write SRWD */
writeb(ASPEED_FLASH_BASE, WRSR);
writeb(ASPEED_FLASH_BASE, SRWD);
writeb(ASPEED_FLASH_BASE, RDSR);
r = readb(ASPEED_FLASH_BASE);
spi_ctrl_stop_user();
g_assert_cmphex(r & SRWD, ==, SRWD);
/* WP# low and SRWD high -> status register NOT writable */
spi_ctrl_start_user();
writeb(ASPEED_FLASH_BASE, WREN);
/* test ability to write SRWD */
writeb(ASPEED_FLASH_BASE, WRSR);
writeb(ASPEED_FLASH_BASE, 0);
writeb(ASPEED_FLASH_BASE, RDSR);
r = readb(ASPEED_FLASH_BASE);
spi_ctrl_stop_user();
/* write is not successful */
g_assert_cmphex(r & SRWD, ==, SRWD);
qtest_set_irq_in(global_qtest,
"/machine/soc/fmc/ssi.0/child[0]", "WP#", 0, 1);
flash_reset();
}
static char tmp_path[] = "/tmp/qtest.m25p80.XXXXXX";
int main(int argc, char **argv)
@ -467,6 +527,8 @@ int main(int argc, char **argv)
qtest_add_func("/ast2400/smc/read_page_mem", test_read_page_mem);
qtest_add_func("/ast2400/smc/write_page_mem", test_write_page_mem);
qtest_add_func("/ast2400/smc/read_status_reg", test_read_status_reg);
qtest_add_func("/ast2400/smc/status_reg_write_protection",
test_status_reg_write_protection);
flash_reset();
ret = g_test_run();