This is based on the idea from the "Make satasii driver more robust" patch Signed-off-by: Carl-Daniel Hailfinger <[email protected]>
It is missing the BAR access changes, but factors out the wait loop and replaces all endless loops instead of just a few. Signed-off-by: Stefan Tauner <[email protected]> --- i am not sure if we really want to ignore the hung status register. Normally, i would have really aborted on timeouts, but since this was not part of the original patch i kept the ignoring behavior. --- satasii.c | 27 +++++++++++++++++++-------- 1 file changed, 19 insertions(+), 8 deletions(-) diff --git a/satasii.c b/satasii.c index e210e10..a68a0c4 100644 --- a/satasii.c +++ b/satasii.c @@ -61,6 +61,20 @@ static int satasii_shutdown(void *data) return 0; } +static uint32_t satasii_wait_done(void) +{ + uint32_t ctrl_reg; + int i = 0; + while ((ctrl_reg = pci_mmio_readl(sii_bar)) & (1 << 25)) { + if (++i > 10000) { + msg_perr("%s: control register stuck at %08x, ignoring.\n", + __func__, pci_mmio_readl(sii_bar)); + break; + } + } + return ctrl_reg; +} + int satasii_init(void) { uint32_t addr; @@ -97,9 +111,8 @@ int satasii_init(void) static void satasii_chip_writeb(const struct flashctx *flash, uint8_t val, chipaddr addr) { - uint32_t ctrl_reg, data_reg; - - while ((ctrl_reg = pci_mmio_readl(sii_bar)) & (1 << 25)) ; + uint32_t data_reg; + uint32_t ctrl_reg = satasii_wait_done(); /* Mask out unused/reserved bits, set writes and start transaction. */ ctrl_reg &= 0xfcf80000; @@ -109,14 +122,12 @@ static void satasii_chip_writeb(const struct flashctx *flash, uint8_t val, chipa pci_mmio_writel(data_reg, (sii_bar + 4)); pci_mmio_writel(ctrl_reg, sii_bar); - while (pci_mmio_readl(sii_bar) & (1 << 25)) ; + satasii_wait_done(); } static uint8_t satasii_chip_readb(const struct flashctx *flash, const chipaddr addr) { - uint32_t ctrl_reg; - - while ((ctrl_reg = pci_mmio_readl(sii_bar)) & (1 << 25)) ; + uint32_t ctrl_reg = satasii_wait_done(); /* Mask out unused/reserved bits, set reads and start transaction. */ ctrl_reg &= 0xfcf80000; @@ -124,7 +135,7 @@ static uint8_t satasii_chip_readb(const struct flashctx *flash, const chipaddr a pci_mmio_writel(ctrl_reg, sii_bar); - while (pci_mmio_readl(sii_bar) & (1 << 25)) ; + satasii_wait_done(); return (pci_mmio_readl(sii_bar + 4)) & 0xff; } -- Kind regards, Stefan Tauner _______________________________________________ flashrom mailing list [email protected] http://www.flashrom.org/mailman/listinfo/flashrom
