diff options
Diffstat (limited to 'linux/dev')
| -rw-r--r-- | linux/dev/drivers/block/ahci.c | 46 |
1 files changed, 40 insertions, 6 deletions
diff --git a/linux/dev/drivers/block/ahci.c b/linux/dev/drivers/block/ahci.c index 868f8d0..58105a7 100644 --- a/linux/dev/drivers/block/ahci.c +++ b/linux/dev/drivers/block/ahci.c @@ -877,6 +877,7 @@ static void ahci_probe_dev(unsigned char bus, unsigned char device) for (i = 0; i < AHCI_MAX_PORTS; i++) { u32 ssts; + u8 spd, ipm; if (!(port_map & (1U << i))) continue; @@ -884,12 +885,45 @@ static void ahci_probe_dev(unsigned char bus, unsigned char device) ahci_port = &ahci_host->ports[i]; ssts = readl(&ahci_port->ssts); - if ((ssts & 0xf) != 0x3) - /* Device not present */ - continue; - if (((ssts >> 8) & 0xf) != 0x1) - /* Device down */ - continue; + spd = ssts & 0xf; + switch (spd) + { + case 0x0: + /* Device not present */ + continue; + case 0x1: + printk("ahci: %02u:%02u.%u: Port %u communication not established. TODO: power on device\n", bus, dev, fun, i); + continue; + case 0x3: + /* Present and communication established */ + break; + case 0x4: + printk("ahci: %02u:%02u.%u: Phy offline?!\n", bus, dev, fun, i); + continue; + default: + printk("ahci: %02u:%02u.%u: Unknown port %u SPD %x\n", bus, dev, fun, i, spd); + continue; + } + + ipm = (ssts >> 8) & 0xf; + switch (ipm) + { + case 0x0: + /* Device not present */ + continue; + case 0x1: + /* Active */ + break; + case 0x2: + printk("ahci: %02u:%02u.%u: Port %u in Partial power management. TODO: power on device\n", bus, dev, fun, i); + continue; + case 0x6: + printk("ahci: %02u:%02u.%u: Port %u in Slumber power management. TODO: power on device\n", bus, dev, fun, i); + continue; + default: + printk("ahci: %02u:%02u.%u: Unknown port %u IPM %x\n", bus, dev, fun, i, ipm); + continue; + } /* OK! Probe this port */ ahci_probe_port(ahci_host, ahci_port); |