diff options
| -rw-r--r-- | drivers/ata/libata-eh.c | 14 | ||||
| -rw-r--r-- | drivers/ata/libata-zpodd.c | 75 | ||||
| -rw-r--r-- | drivers/ata/libata.h | 5 |
3 files changed, 92 insertions, 2 deletions
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c index bcf4437214f..a0dddc3b492 100644 --- a/drivers/ata/libata-eh.c +++ b/drivers/ata/libata-eh.c @@ -1591,7 +1591,7 @@ static int ata_eh_read_log_10h(struct ata_device *dev, * RETURNS: * 0 on success, AC_ERR_* mask on failure. */ -static unsigned int atapi_eh_tur(struct ata_device *dev, u8 *r_sense_key) +unsigned int atapi_eh_tur(struct ata_device *dev, u8 *r_sense_key) { u8 cdb[ATAPI_CDB_LEN] = { TEST_UNIT_READY, 0, 0, 0, 0, 0 }; struct ata_taskfile tf; @@ -1624,7 +1624,7 @@ static unsigned int atapi_eh_tur(struct ata_device *dev, u8 *r_sense_key) * RETURNS: * 0 on success, AC_ERR_* mask on failure */ -static unsigned int atapi_eh_request_sense(struct ata_device *dev, +unsigned int atapi_eh_request_sense(struct ata_device *dev, u8 *sense_buf, u8 dfl_sense_key) { u8 cdb[ATAPI_CDB_LEN] = @@ -4022,6 +4022,7 @@ static void ata_eh_handle_port_suspend(struct ata_port *ap) { unsigned long flags; int rc = 0; + struct ata_device *dev; /* are we suspending? */ spin_lock_irqsave(ap->lock, flags); @@ -4034,6 +4035,15 @@ static void ata_eh_handle_port_suspend(struct ata_port *ap) WARN_ON(ap->pflags & ATA_PFLAG_SUSPENDED); + /* + * If we have a ZPODD attached, check its zero + * power ready status before the port is frozen. + */ + ata_for_each_dev(dev, &ap->link, ENABLED) { + if (zpodd_dev_enabled(dev)) + zpodd_on_suspend(dev); + } + /* tell ACPI we're suspending */ rc = ata_acpi_on_suspend(ap); if (rc) diff --git a/drivers/ata/libata-zpodd.c b/drivers/ata/libata-zpodd.c index 9a0d90d09d8..71dd48c94f2 100644 --- a/drivers/ata/libata-zpodd.c +++ b/drivers/ata/libata-zpodd.c @@ -1,10 +1,15 @@ #include <linux/libata.h> #include <linux/cdrom.h> #include <linux/pm_runtime.h> +#include <linux/module.h> #include <scsi/scsi_device.h> #include "libata.h" +static int zpodd_poweroff_delay = 30; /* 30 seconds for power off delay */ +module_param(zpodd_poweroff_delay, int, 0644); +MODULE_PARM_DESC(zpodd_poweroff_delay, "Poweroff delay for ZPODD in seconds"); + enum odd_mech_type { ODD_MECH_TYPE_SLOT, ODD_MECH_TYPE_DRAWER, @@ -18,6 +23,9 @@ struct zpodd { /* The following fields are synchronized by PM core. */ bool from_notify; /* resumed as a result of * acpi wake notification */ + bool zp_ready; /* ZP ready state */ + unsigned long last_ready; /* last ZP ready timestamp */ + bool zp_sampled; /* ZP ready state sampled */ }; /* Per the spec, only slot type and drawer type ODD can be supported */ @@ -74,6 +82,73 @@ static bool odd_can_poweroff(struct ata_device *ata_dev) return acpi_device_can_poweroff(acpi_dev); } +/* Test if ODD is zero power ready by sense code */ +static bool zpready(struct ata_device *dev) +{ + u8 sense_key, *sense_buf; + unsigned int ret, asc, ascq, add_len; + struct zpodd *zpodd = dev->zpodd; + + ret = atapi_eh_tur(dev, &sense_key); + + if (!ret || sense_key != NOT_READY) + return false; + + sense_buf = dev->link->ap->sector_buf; + ret = atapi_eh_request_sense(dev, sense_buf, sense_key); + if (ret) + return false; + + /* sense valid */ + if ((sense_buf[0] & 0x7f) != 0x70) + return false; + + add_len = sense_buf[7]; + /* has asc and ascq */ + if (add_len < 6) + return false; + + asc = sense_buf[12]; + ascq = sense_buf[13]; + + if (zpodd->mech_type == ODD_MECH_TYPE_SLOT) + /* no media inside */ + return asc == 0x3a; + else + /* no media inside and door closed */ + return asc == 0x3a && ascq == 0x01; +} + +/* + * Update the zpodd->zp_ready field. This field will only be set + * if the ODD has stayed in ZP ready state for zpodd_poweroff_delay + * time, and will be used to decide if power off is allowed. If it + * is set, it will be cleared during resume from powered off state. + */ +void zpodd_on_suspend(struct ata_device *dev) +{ + struct zpodd *zpodd = dev->zpodd; + unsigned long expires; + + if (!zpready(dev)) { + zpodd->zp_sampled = false; + return; + } + + if (!zpodd->zp_sampled) { + zpodd->zp_sampled = true; + zpodd->last_ready = jiffies; + return; + } + + expires = zpodd->last_ready + + msecs_to_jiffies(zpodd_poweroff_delay * 1000); + if (time_before(jiffies, expires)) + return; + + zpodd->zp_ready = true; +} + static void zpodd_wake_dev(acpi_handle handle, u32 event, void *context) { struct ata_device *ata_dev = context; diff --git a/drivers/ata/libata.h b/drivers/ata/libata.h index a21740b4ee1..b9b2bb1d5dc 100644 --- a/drivers/ata/libata.h +++ b/drivers/ata/libata.h @@ -182,6 +182,9 @@ extern void ata_eh_finish(struct ata_port *ap); extern int ata_ering_map(struct ata_ering *ering, int (*map_fn)(struct ata_ering_entry *, void *), void *arg); +extern unsigned int atapi_eh_tur(struct ata_device *dev, u8 *r_sense_key); +extern unsigned int atapi_eh_request_sense(struct ata_device *dev, + u8 *sense_buf, u8 dfl_sense_key); /* libata-pmp.c */ #ifdef CONFIG_SATA_PMP @@ -238,10 +241,12 @@ static inline bool zpodd_dev_enabled(struct ata_device *dev) { return dev->zpodd != NULL; } +void zpodd_on_suspend(struct ata_device *dev); #else /* CONFIG_SATA_ZPODD */ static inline void zpodd_init(struct ata_device *dev) {} static inline void zpodd_exit(struct ata_device *dev) {} static inline bool zpodd_dev_enabled(struct ata_device *dev) { return false; } +static inline void zpodd_on_suspend(struct ata_device *dev) {} #endif /* CONFIG_SATA_ZPODD */ #endif /* __LIBATA_H__ */ |