diff options
Diffstat (limited to 'nicintel_spi.c')
| -rw-r--r-- | nicintel_spi.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/nicintel_spi.c b/nicintel_spi.c index 3882e81..28d332e 100644 --- a/nicintel_spi.c +++ b/nicintel_spi.c @@ -148,6 +148,11 @@ int nicintel_spi_init(void) nicintel_spibar = physmap("Intel Gigabit NIC w/ SPI flash", io_base_addr, 4096); + /* Automatic restore of EECD on shutdown is not possible because EECD + * does not only contain FLASH_WRITES_DISABLED|FLASH_WRITES_ENABLED, + * but other bits with side effects as well. Those other bits must be + * left untouched. + */ tmp = pci_mmio_readl(nicintel_spibar + EECD); tmp &= ~FLASH_WRITES_DISABLED; tmp |= FLASH_WRITES_ENABLED; @@ -167,6 +172,9 @@ int nicintel_spi_shutdown(void) { uint32_t tmp; + /* Disable writes manually. See the comment about EECD in + * nicintel_spi_init() for details. + */ tmp = pci_mmio_readl(nicintel_spibar + EECD); tmp &= ~FLASH_WRITES_ENABLED; tmp |= FLASH_WRITES_DISABLED; |
