Changeset b9cc81c6 in mainline

Timestamp:

2025-03-06T17:35:07Z (2 days ago)

Author:

Jiri Svoboda <jiri@…>

Branches:

master

Children:

797ab95

Parents:

870841cf

Message:

Implement quiesce in NS8250 and PC-LPT.

Location:

uspace/drv/char

Files:

• ns8250/ns8250.c (modified) (4 diffs)
• pc-lpt/main.c (modified) (4 diffs)
• pc-lpt/pc-lpt.c (modified) (2 diffs)
• pc-lpt/pc-lpt.h (modified) (2 diffs)

uspace/drv/char/ns8250/ns8250.c

@@ -1 +1 @@
 /*
+ * Copyright (c) 2025 Jiri Svoboda
  * Copyright (c) 2010 Lenka Trochtova
- * Copyright (c) 2017 Jiri Svoboda
  * All rights reserved.
  *
@@ -327 +327 @@
 
 static errno_t ns8250_dev_add(ddf_dev_t *dev);
+static errno_t ns8250_dev_quiesce(ddf_dev_t *dev);
 static errno_t ns8250_dev_remove(ddf_dev_t *dev);
 
@@ -332 +333 @@
 static driver_ops_t ns8250_ops = {
         .dev_add = &ns8250_dev_add,
-        .dev_remove = &ns8250_dev_remove
+        .dev_remove = &ns8250_dev_remove,
+        .dev_quiesce = &ns8250_dev_quiesce
 };
 
@@ -966 +968 @@
 }
 
+static errno_t ns8250_dev_quiesce(ddf_dev_t *dev)
+{
+        ns8250_t *ns = dev_ns8250(dev);
+
+        ns8250_port_interrupts_disable(ns->regs);
+        return EOK;
+}
+
 /** Open the device.
  *

uspace/drv/char/pc-lpt/main.c

@@ -1 +1 @@
 /*
- * Copyright (c) 2018 Jiri Svoboda
+ * Copyright (c) 2025 Jiri Svoboda
  * All rights reserved.
  *
@@ -46 +46 @@
 static errno_t pc_lpt_dev_remove(ddf_dev_t *dev);
 static errno_t pc_lpt_dev_gone(ddf_dev_t *dev);
+static errno_t pc_lpt_dev_quiesce(ddf_dev_t *dev);
 static errno_t pc_lpt_fun_online(ddf_fun_t *fun);
 static errno_t pc_lpt_fun_offline(ddf_fun_t *fun);
@@ -53 +54 @@
         .dev_remove = pc_lpt_dev_remove,
         .dev_gone = pc_lpt_dev_gone,
+        .dev_quiesce = pc_lpt_dev_quiesce,
         .fun_online = pc_lpt_fun_online,
         .fun_offline = pc_lpt_fun_offline
@@ -140 +142 @@
 }
 
+static errno_t pc_lpt_dev_quiesce(ddf_dev_t *dev)
+{
+        pc_lpt_t *pc_lpt = (pc_lpt_t *)ddf_dev_data_get(dev);
+
+        ddf_msg(LVL_DEBUG, "pc_lpt_dev_quiesce(%p)", dev);
+
+        pc_lpt_quiesce(pc_lpt);
+        return EOK;
+}
+
 static errno_t pc_lpt_fun_online(ddf_fun_t *fun)
 {

uspace/drv/char/pc-lpt/pc-lpt.c

@@ -1 +1 @@
 /*
- * Copyright (c) 2018 Jiri Svoboda
+ * Copyright (c) 2025 Jiri Svoboda
  * All rights reserved.
  *
@@ -196 +196 @@
 }
 
+/** Quiesce pc-lpt device */
+void pc_lpt_quiesce(pc_lpt_t *lpt)
+{
+        uint8_t control;
+
+        control = 0; /* nINIT=0, IRQ_ENABLE=0 */
+        pio_write_8(&lpt->regs->control, control);
+}
+
 /** Write a single byte to the parallel port.
  *

uspace/drv/char/pc-lpt/pc-lpt.h

@@ -1 +1 @@
 /*
- * Copyright (c) 2018 Jiri Svoboda
+ * Copyright (c) 2025 Jiri Svoboda
  * All rights reserved.
  *
@@ -74 +74 @@
 extern errno_t pc_lpt_remove(pc_lpt_t *);
 extern errno_t pc_lpt_gone(pc_lpt_t *);
+extern void pc_lpt_quiesce(pc_lpt_t *);
 
 #endif