Changes in uspace/drv/char/ski-con/ski-con.c [676e833:7a6065c] in mainline

File:

• uspace/drv/char/ski-con/ski-con.c (modified) (8 diffs)

uspace/drv/char/ski-con/ski-con.c

@@ -1 +1 @@
 /*
  * Copyright (c) 2005 Jakub Jermar
- * Copyright (c) 2011 Jiri Svoboda
+ * Copyright (c) 2017 Jiri Svoboda
  * All rights reserved.
  *
@@ -34 +34 @@
 #include <ddf/log.h>
 #include <errno.h>
-#include <ipc/char.h>
+#include <fibril.h>
+#include <io/chardev.h>
 #include <stdint.h>
 #include <stdlib.h>
-#include <thread.h>
 #include <stdbool.h>
 
@@ -46 +46 @@
 #define POLL_INTERVAL           10000
 
-static void ski_con_thread_impl(void *arg);
+static int ski_con_fibril(void *arg);
 static int32_t ski_con_getchar(void);
 static void ski_con_connection(ipc_callid_t, ipc_call_t *, void *);
 
+static int ski_con_read(chardev_srv_t *, void *, size_t, size_t *);
+static int ski_con_write(chardev_srv_t *, const void *, size_t, size_t *);
+
+static chardev_ops_t ski_con_chardev_ops = {
+        .read = ski_con_read,
+        .write = ski_con_write
+};
+
 /** Add ski console device. */
 int ski_con_add(ski_con_t *con)
 {
-        thread_id_t tid;
+        fid_t fid;
         ddf_fun_t *fun = NULL;
         bool bound = false;
         int rc;
+
+        circ_buf_init(&con->cbuf, con->buf, ski_con_buf_size, 1);
+        fibril_mutex_initialize(&con->buf_lock);
+        fibril_condvar_initialize(&con->buf_cv);
 
         fun = ddf_fun_create(con->dev, fun_exposed, "a");
@@ -67 +79 @@
         ddf_fun_set_conn_handler(fun, ski_con_connection);
 
+        chardev_srvs_init(&con->cds);
+        con->cds.ops = &ski_con_chardev_ops;
+        con->cds.sarg = con;
+
         rc = ddf_fun_bind(fun);
         if (rc != EOK) {
@@ -75 +91 @@
         bound = true;
 
-        rc = thread_create(ski_con_thread_impl, con, "kbd_poll", &tid);
-        if (rc != 0) {
-                return rc;
-        }
-
+        fid = fibril_create(ski_con_fibril, con);
+        if (fid == 0) {
+                ddf_msg(LVL_ERROR, "Error creating fibril.");
+                rc = ENOMEM;
+                goto error;
+        }
+
+        fibril_add_ready(fid);
         return EOK;
 error:
@@ -102 +121 @@
 }
 
-/** Thread to poll Ski for keypresses. */
-static void ski_con_thread_impl(void *arg)
+/** Poll Ski for keypresses. */
+static int ski_con_fibril(void *arg)
 {
         int32_t c;
         ski_con_t *con = (ski_con_t *) arg;
+        int rc;
 
         while (1) {
@@ -114 +134 @@
                                 break;
 
-                        if (con->client_sess != NULL) {
-                                async_exch_t *exch = async_exchange_begin(con->client_sess);
-                                async_msg_1(exch, CHAR_NOTIF_BYTE, c);
-                                async_exchange_end(exch);
-                        }
+                        fibril_mutex_lock(&con->buf_lock);
+
+                        rc = circ_buf_push(&con->cbuf, &c);
+                        if (rc != EOK)
+                                ddf_msg(LVL_ERROR, "Buffer overrun");
+
+                        fibril_mutex_unlock(&con->buf_lock);
+                        fibril_condvar_broadcast(&con->buf_cv);
                 }
 
-                thread_usleep(POLL_INTERVAL);
-        }
+                fibril_usleep(POLL_INTERVAL);
+        }
+
+        return 0;
 }
 
@@ -157 +182 @@
 }
 
+/** Read from Ski console device */
+static int ski_con_read(chardev_srv_t *srv, void *buf, size_t size,
+    size_t *nread)
+{
+        ski_con_t *con = (ski_con_t *) srv->srvs->sarg;
+        size_t p;
+        uint8_t *bp = (uint8_t *) buf;
+        int rc;
+
+        fibril_mutex_lock(&con->buf_lock);
+
+        while (circ_buf_nused(&con->cbuf) == 0)
+                fibril_condvar_wait(&con->buf_cv, &con->buf_lock);
+
+        p = 0;
+        while (p < size) {
+                rc = circ_buf_pop(&con->cbuf, &bp[p]);
+                if (rc != EOK)
+                        break;
+                ++p;
+        }
+
+        fibril_mutex_unlock(&con->buf_lock);
+
+        *nread = p;
+        return EOK;
+}
+
+/** Write to Ski console device */
+static int ski_con_write(chardev_srv_t *srv, const void *data, size_t size,
+    size_t *nwr)
+{
+        ski_con_t *con = (ski_con_t *) srv->srvs->sarg;
+        size_t i;
+        uint8_t *dp = (uint8_t *) data;
+
+        for (i = 0; i < size; i++)
+                ski_con_putchar(con, dp[i]); 
+
+        *nwr = size;
+        return EOK;
+}
+
 /** Character device connection handler. */
 static void ski_con_connection(ipc_callid_t iid, ipc_call_t *icall,
     void *arg)
 {
-        ski_con_t *con;
-
-        /* Answer the IPC_M_CONNECT_ME_TO call. */
-        async_answer_0(iid, EOK);
-
-        con = (ski_con_t *)ddf_dev_data_get(ddf_fun_get_dev((ddf_fun_t *)arg));
-
-        while (true) {
-                ipc_call_t call;
-                ipc_callid_t callid = async_get_call(&call);
-                sysarg_t method = IPC_GET_IMETHOD(call);
-
-                if (!method) {
-                        /* The other side has hung up. */
-                        async_answer_0(callid, EOK);
-                        return;
-                }
-
-                async_sess_t *sess =
-                    async_callback_receive_start(EXCHANGE_SERIALIZE, &call);
-                if (sess != NULL) {
-                        if (con->client_sess == NULL) {
-                                con->client_sess = sess;
-                                async_answer_0(callid, EOK);
-                        } else
-                                async_answer_0(callid, ELIMIT);
-                } else {
-                        switch (method) {
-                        case CHAR_WRITE_BYTE:
-                                ddf_msg(LVL_DEBUG, "Write %" PRIun " to device\n",
-                                    IPC_GET_ARG1(call));
-                                ski_con_putchar(con, (uint8_t) IPC_GET_ARG1(call));
-                                async_answer_0(callid, EOK);
-                                break;
-                        default:
-                                async_answer_0(callid, EINVAL);
-                        }
-                }
-        }
+        ski_con_t *con = (ski_con_t *) ddf_dev_data_get(
+            ddf_fun_get_dev((ddf_fun_t *) arg));
+
+        chardev_conn(iid, icall, &con->cds);
 }