Changeset 5d50c419 in mainline for uspace/drv/hid/ps2mouse/ps2mouse.c

Timestamp:

2017-11-19T21:14:19Z (8 years ago)

Author:

Jiri Svoboda <jiri@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

c657bd7

Parents:

75fcf9b

Message:

Chardev API should separate error code from number of bytes transferred. This is cleaner, allows the code to be more independent of Exxx sign and allows for partial success (some bytes successfully transferred and then an error occurred.)

File:

• uspace/drv/hid/ps2mouse/ps2mouse.c (modified) (6 diffs)

uspace/drv/hid/ps2mouse/ps2mouse.c

@@ -75 +75 @@
         uint8_t value = (value_); \
         uint8_t data = 0; \
-        const ssize_t size = chardev_read((mouse)->chardev, &data, 1); \
-        if (size != 1) { \
-                ddf_msg(LVL_ERROR, "Failed reading byte: %zd)", size);\
-                return size < 0 ? size : EIO; \
+        size_t nread; \
+        const int rc = chardev_read((mouse)->chardev, &data, 1, &nread); \
+        if (rc != EOK) { \
+                ddf_msg(LVL_ERROR, "Failed reading byte: %d", rc);\
+                return rc; \
         } \
         if (data != value) { \
@@ -91 +92 @@
         uint8_t value = (value_); \
         uint8_t data = (value); \
-        const ssize_t size = chardev_write((mouse)->chardev, &data, 1); \
-        if (size < 0 ) { \
-                ddf_msg(LVL_ERROR, "Failed writing byte: %hhx", value); \
-                return size; \
+        size_t nwr; \
+        const int rc = chardev_write((mouse)->chardev, &data, 1, &nwr); \
+        if (rc != EOK) { \
+                ddf_msg(LVL_ERROR, "Failed writing byte: %d", rc); \
+                return rc; \
         } \
 } while (0)
@@ -172 +174 @@
         /* Enable mouse data reporting. */
         uint8_t report = PS2_MOUSE_ENABLE_DATA_REPORT;
-        ssize_t size = chardev_write(mouse->chardev, &report, 1);
-        if (size != 1) {
+        size_t nwr;
+        rc = chardev_write(mouse->chardev, &report, 1, &nwr);
+        if (rc != EOK) {
                 ddf_msg(LVL_ERROR, "Failed to enable data reporting.");
                 rc = EIO;
@@ -179 +182 @@
         }
 
-        size = chardev_read(mouse->chardev, &report, 1);
-        if (size != 1 || report != PS2_MOUSE_ACK) {
+        size_t nread;
+        rc = chardev_read(mouse->chardev, &report, 1, &nread);
+        if (rc != EOK || report != PS2_MOUSE_ACK) {
                 ddf_msg(LVL_ERROR, "Failed to confirm data reporting: %hhx.",
                     report);
@@ -215 +219 @@
 {
         ps2_mouse_t *mouse = (ps2_mouse_t *) arg;
+        size_t nread;
+        int rc;
 
         bool buttons[PS2_BUTTON_COUNT] = {};
         while (1) {
                 uint8_t packet[PS2_BUFSIZE] = {};
-                const ssize_t size =
-                    chardev_read(mouse->chardev, packet, PS2_BUFSIZE);
-
-                if (size != PS2_BUFSIZE) {
-                        ddf_msg(LVL_WARN, "Incorrect packet size: %zd.", size);
+                rc = chardev_read(mouse->chardev, packet, PS2_BUFSIZE, &nread);
+                if (rc != EOK || nread != PS2_BUFSIZE) {
+                        ddf_msg(LVL_WARN, "Incorrect packet size: %zd.", nread);
                         continue;
                 }
+
                 ddf_msg(LVL_DEBUG2, "Got packet: %hhx:%hhx:%hhx.",
                     packet[0], packet[1], packet[2]);
@@ -269 +274 @@
 {
         ps2_mouse_t *mouse = (ps2_mouse_t *) arg;
+        size_t nread;
+        int rc;
 
         bool buttons[INTELLIMOUSE_BUTTON_COUNT] = {};
         while (1) {
                 uint8_t packet[INTELLIMOUSE_BUFSIZE] = {};
-                const ssize_t size = chardev_read(
-                    mouse->chardev, packet, INTELLIMOUSE_BUFSIZE);
-
-                if (size != INTELLIMOUSE_BUFSIZE) {
-                        ddf_msg(LVL_WARN, "Incorrect packet size: %zd.", size);
+                rc = chardev_read(mouse->chardev, packet, INTELLIMOUSE_BUFSIZE,
+                    &nread);
+                if (rc != EOK || nread != INTELLIMOUSE_BUFSIZE) {
+                        ddf_msg(LVL_WARN, "Incorrect packet size: %zd.", nread);
                         continue;
                 }