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-rw-r--r--drivers/ata/libata-eh.c14
-rw-r--r--drivers/ata/libata-zpodd.c75
-rw-r--r--drivers/ata/libata.h5
3 files changed, 92 insertions, 2 deletions
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index bcf4437214f5..a0dddc3b4924 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 9a0d90d09d81..71dd48c94f2c 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 a21740b4ee11..b9b2bb1d5dc6 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__ */