From: Luca Lauro <[email protected]> Some AHCI controllers require ATA FLUSH EXT and STANDBY IMMEDIATE to be issued before poweroff to ensure data integrity and proper device shutdown. This patch introduces ahci_port_shutdown(), which sends these commands using ahci_ata_nodata().
Signed-off-by: Luca Lauro <[email protected]> --- drivers/ata/ahci.c | 46 +++++----------------------------------------- 1 file changed, 5 insertions(+), 41 deletions(-) diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c index c78d1953e4..9ac34b15fe 100644 --- a/drivers/ata/ahci.c +++ b/drivers/ata/ahci.c @@ -49,6 +49,11 @@ #define ahci_debug(ahci, fmt, arg...) \ dev_dbg(ahci->dev, fmt, ##arg) +#define ATA_CMD_FLUSH_EXT 0xEA +#define ATA_CMD_STANDBYNOW1 0xE0 + +static LIST_HEAD(ahci_devices); + static const struct pci_device_id ahci_pci_tbl[] = { { PCI_DEVICE(PCI_VENDOR_ID_MARVELL_EXT, 0x9170) }, { 0, } @@ -691,47 +696,6 @@ static void ahci_port_shutdown(struct ahci_port *port) ahci_port_info(port, "STANDBY IMMEDIATE failed\n"); } -/* Full poweroff sequence */ -static void ahci_poweroff(struct poweroff_handler *handler, unsigned long flags) -{ - struct ahci_device *ahci; - int i, n_ports; - - list_for_each_entry(ahci, &ahci_devices, list) { - - if (!ahci->mmio_base) - continue; - - /* FLUSH + STANDBY on all active ports */ - n_ports = max_t(int, ahci->n_ports, fls(ahci->port_map)); - - for (i = 0; i < n_ports; i++) { - struct ahci_port *port = &ahci->ports[i]; - - if (!(ahci->port_map & (1 << i))) - continue; - - ahci_port_shutdown(port); - } - - /* (optional) shutsown controller after commands - * ahci_shutdown_host(ahci); - */ - } -} - -static struct poweroff_handler ahci_po_handler = { - .poweroff = ahci_poweroff, - .priority = 200, /* higher than gpio-poweroff */ -}; - -static int ahci_register_poweroff(void) -{ - poweroff_handler_register(&ahci_po_handler); - return 0; -} -postcore_initcall(ahci_register_poweroff); - static __maybe_unused struct of_device_id ahci_dt_ids[] = { { .compatible = "calxeda,hb-ahci", -- 2.47.3
