From 7d98f8c500de452277e2700a950b23bf4685ed64 Mon Sep 17 00:00:00 2001
From: Charles <charles.chiou@xxxxxxxxxxxxxx>
Date: Wed, 2 Sep 2015 20:54:45 +0800
Subject: [PATCH 3/3] scsi:stex.c Add S3/S4 support
Add S3/S4 support, add .suspend and .resume function in pci_driver.
In .suspend handler, driver send S3/S4 signal to the device.
Signed-off-by: Charles Chiou <charles.chiou@xxxxxxxxxxxxxx>
---
drivers/scsi/stex.c | 65
++++++++++++++++++++++++++++++++++++++++++++++++++---
1 file changed, 62 insertions(+), 3 deletions(-)
diff --git a/drivers/scsi/stex.c b/drivers/scsi/stex.c
index 6578f3d..45482d5 100644
--- a/drivers/scsi/stex.c
+++ b/drivers/scsi/stex.c
@@ -166,6 +166,13 @@ enum {
ST_ADDITIONAL_MEM = 0x200000,
ST_ADDITIONAL_MEM_MIN = 0x80000,
+ PMIC_SHUTDOWN = 0x0D,
+ PMIC_REUMSE = 0x10,
+ ST_IGNORED = -1,
+ ST_S3 = 3,
+ ST_S4 = 4,
+ ST_S5 = 5,
+ ST_S6 = 6,
};
struct st_sgitem {
@@ -360,6 +367,8 @@ static const char console_inq_page[] =
0x0C,0x20,0x20,0x20,0x20,0x20,0x20,0x20
};
+
+
MODULE_AUTHOR("Ed Lin");
MODULE_DESCRIPTION("Promise Technology SuperTrak EX Controllers");
MODULE_LICENSE("GPL");
@@ -1359,6 +1368,9 @@ static void stex_reset_work(struct work_struct *work)
stex_do_reset(hba);
}
+
+
+
static int stex_biosparam(struct scsi_device *sdev,
struct block_device *bdev, sector_t capacity, int geom[])
{
@@ -1736,7 +1748,7 @@ out_disable:
return err;
}
-static void stex_hba_stop(struct st_hba *hba)
+static void stex_hba_stop(struct st_hba *hba, int st_sleep_mic)
{
struct req_msg *req;
struct st_msg_header *msg_h;
@@ -1752,11 +1764,18 @@ static void stex_hba_stop(struct st_hba *hba)
} else
memset(req, 0, hba->rq_size);
- if (hba->cardtype == st_yosemite || hba->cardtype == st_yel) {
+ if ((hba->cardtype == st_yosemite || hba->cardtype == st_yel)
+ && st_sleep_mic == ST_IGNORED) {
req->cdb[0] = MGT_CMD;
req->cdb[1] = MGT_CMD_SIGNATURE;
req->cdb[2] = CTLR_CONFIG_CMD;
req->cdb[3] = CTLR_SHUTDOWN;
+ } else if (hba->cardtype == st_yel && st_sleep_mic != ST_IGNORED) {
+ req->cdb[0] = MGT_CMD;
+ req->cdb[1] = MGT_CMD_SIGNATURE;
+ req->cdb[2] = CTLR_CONFIG_CMD;
+ req->cdb[3] = PMIC_SHUTDOWN;
+ req->cdb[4] = st_sleep_mic;
} else {
req->cdb[0] = CONTROLLER_CMD;
req->cdb[1] = CTLR_POWER_STATE_CHANGE;
@@ -1776,10 +1795,12 @@ static void stex_hba_stop(struct st_hba *hba)
while (hba->ccb[tag].req_type & PASSTHRU_REQ_TYPE) {
if (time_after(jiffies, before + ST_INTERNAL_TIMEOUT * HZ)) {
hba->ccb[tag].req_type = 0;
+ hba->mu_status = MU_STATE_STOP;
return;
}
msleep(1);
}
+ hba->mu_status = MU_STATE_STOP;
}
static void stex_hba_free(struct st_hba *hba)
@@ -1819,9 +1840,45 @@ static void stex_shutdown(struct pci_dev *pdev)
{
struct st_hba *hba = pci_get_drvdata(pdev);
- stex_hba_stop(hba);
+ if (hba->supports_pm == 0)
+ stex_hba_stop(hba, ST_IGNORED);
+ else
+ stex_hba_stop(hba, ST_S5);
+}
+
+static int stex_choice_sleep_mic(pm_message_t state)
+{
+ switch (state.event) {
+ case PM_EVENT_SUSPEND:
+ return ST_S3;
+ case PM_EVENT_FREEZE:
+ case PM_EVENT_HIBERNATE:
+ return ST_S4;
+ default:
+ return ST_S4;
+ }
+}
+
+static int stex_suspend(struct pci_dev *pdev, pm_message_t state)
+{
+ struct st_hba *hba = pci_get_drvdata(pdev);
+
+ if (hba->cardtype == st_yel && hba->supports_pm == 1)
+ stex_hba_stop(hba, stex_choice_sleep_mic(state));
+ else
+ stex_hba_stop(hba, ST_IGNORED);
+ return 0;
}
+
+static int stex_resume(struct pci_dev *pdev)
+{
+ struct st_hba *hba = pci_get_drvdata(pdev);
+
+ hba->mu_status = MU_STATE_STARTING;
+ stex_handshake(hba);
+ return 0;
+}
MODULE_DEVICE_TABLE(pci, stex_pci_tbl);
static struct pci_driver stex_pci_driver = {
@@ -1830,6 +1887,8 @@ static struct pci_driver stex_pci_driver = {
.probe = stex_probe,
.remove = stex_remove,
.shutdown = stex_shutdown,
+ .suspend = stex_suspend,
+ .resume = stex_resume,
};
static int __init stex_init(void)
--
1.9.1
--
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