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path: root/packages/linux/linux-ezx-2.6.23/patches/mux-remove-flipbuffers.patch
blob: d4781f9fc7b06a081e36b228e02bbe92d7f87071 (plain)
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Index: linux-2.6.16/drivers/char/ts0710_mux_usb.c
===================================================================
--- linux-2.6.16.orig/drivers/char/ts0710_mux_usb.c	2007-01-17 00:52:25.000000000 +0100
+++ linux-2.6.16/drivers/char/ts0710_mux_usb.c	2007-01-17 00:52:26.000000000 +0100
@@ -133,6 +133,7 @@

 	struct circ_buf		xmit;		/* write cric bufffer */
   	struct list_head 	in_buf_list;
+	spinlock_t		in_buf_lock;
 	char 			bulk_in_ep_mux,
 				bulk_out_ep_mux,
 				bulk_in_ep_dsplog;
@@ -204,9 +205,39 @@
 		return;
 	}
 	memcpy(inbuf->body, (unsigned char*)urb->transfer_buffer, count);
+	spin_lock(&bvd_ipc->in_buf_lock);
 	list_add_tail(&inbuf->list, &bvd_ipc->in_buf_list);
+	spin_unlock(&bvd_ipc->in_buf_lock);
 }

+int get_from_inbuf_list(const unsigned char *buf, int dst_count)
+{
+	int ret = 0;
+	spin_lock(&bvd_ipc->in_buf_lock);
+	if (!(list_empty(&bvd_ipc->in_buf_list))) {
+		int src_count;
+		buf_list_t *inbuf;
+		struct list_head *ptr;
+
+		ptr = bvd_ipc->in_buf_list.next;
+		inbuf = list_entry(ptr, buf_list_t, list);
+		src_count = inbuf->size;
+		if (dst_count >= src_count) {
+			memcpy(buf, inbuf->body, src_count);
+			ret = src_count;
+			list_del(ptr);
+			kfree(inbuf->body);
+			kfree(inbuf);
+		} else {
+			bvd_dbg("get_from_inbuf_list: not enough space in destination buffer");
+		}
+	}
+	spin_unlock(&bvd_ipc->in_buf_lock);
+
+	return ret;
+}
+EXPORT_SYMBOL(get_from_inbuf_list);
+
 static void ipcusb_timeout(unsigned long data)
 {
 	struct tty_struct *tty = &ipcusb_tty;
@@ -214,13 +245,14 @@

 	bvd_dbg("ipcusb_timeout***");

+	spin_lock(&bvd_ipc->in_buf_lock);
 	while (!(list_empty(&bvd_ipc->in_buf_list))) {
 		int count;
 		buf_list_t *inbuf;
 		struct list_head *ptr = NULL;

 		ptr = bvd_ipc->in_buf_list.next;
-		inbuf = list_entry (ptr, buf_list_t, list);
+		inbuf = list_entry(ptr, buf_list_t, list);
 		count = inbuf->size;
 		if (tty_insert_flip_string(tty, inbuf->body, count) >= count) {
 			list_del(ptr);
@@ -232,10 +264,12 @@
 			break;
 		}
 	}
+	spin_unlock(&bvd_ipc->in_buf_lock);

 	if (usb_mux_dispatcher)
 		usb_mux_dispatcher(tty);	/**call Liu changhui's func.**/

+	spin_lock(&bvd_ipc->in_buf_lock);
 	if (list_empty(&bvd_ipc->in_buf_list)) {
 		urb->actual_length = 0;
 		urb->dev = bvd_ipc->ipc_dev;
@@ -246,6 +280,7 @@
 		ipcusb_timer.data = (unsigned long)urb;
 		mod_timer(&ipcusb_timer, jiffies+(10*HZ/1000));
 	}
+	spin_unlock(&bvd_ipc->in_buf_lock);
 }

 static void usb_ipc_read_bulk(struct urb *urb, struct pt_regs *regs)
@@ -266,69 +301,11 @@
 	if (count > 0 && ((*ipcusb_bp_to_ap) != NULL))
 		(*ipcusb_bp_to_ap)(urb->transfer_buffer, urb->actual_length);

- 	if (!(list_empty(&bvd_ipc->in_buf_list))) {
-		int need_mux = 0;
-
- 		bvd_dbg("usb_ipc_read_bulk: some urbs in_buf_list");
-		if (count > 0) {
-			bvd_ipc->suspend_flag = 1;
-			append_to_inbuf_list(urb); /* append the current received urb */
-#if 0
-			if(jiffies - last_jiff > ICL_EVENT_INTERVAL)
-			{
-				last_jiff = jiffies;
-				queue_apm_event(KRNL_ICL, NULL);
-			}
-#endif
-		}
-
-		while (!(list_empty(&bvd_ipc->in_buf_list))) {
-			struct list_head* ptr = NULL;
-			ptr = bvd_ipc->in_buf_list.next;
-			inbuf = list_entry(ptr, buf_list_t, list);
-			count = inbuf->size;
-			need_mux = 1;
-
-			tty_insert_flip_string(tty, inbuf->body, count);
-
-			list_del(ptr);
-			kfree(inbuf->body);
-			inbuf->body = NULL;
-			kfree(inbuf);
-		}
-
-		if (usb_mux_dispatcher && need_mux)
-			usb_mux_dispatcher(tty); /* call Liu changhui's func. */
-
-		if (list_empty(&bvd_ipc->in_buf_list)) {
-			urb->actual_length = 0;
-			urb->dev = bvd_ipc->ipc_dev;
-			if (usb_submit_urb(urb, GFP_ATOMIC))
-				bvd_dbg("usb_ipc_read_bulk: "
-					"failed resubmitting read urb");
-			bvd_dbg("usb_ipc_read_bulk: resubmited read urb");
-		} else {
-			ipcusb_timer.data = (unsigned long)urb;
-			mod_timer(&ipcusb_timer, jiffies+(10*HZ/1000));
-		}
-	} else if (count > 0) {
- 		bvd_dbg("usb_ipc_read_bulk: no urbs in_buf_list");
+ 	if (count > 0) {
+ 		bvd_dbg("usb_ipc_read_bulk: inserting buffer into in_buf_list");
 		bvd_ipc->suspend_flag = 1;

-		if (tty_insert_flip_string(tty, urb->transfer_buffer,
-					   count) < count) {
-			bvd_ipc->suspend_flag = 1;
-			append_to_inbuf_list(urb);
-			ipcusb_timer.data = (unsigned long)urb;
-			mod_timer(&ipcusb_timer, jiffies+(10*HZ/1000));
-#if 0
-			if(jiffies - last_jiff > ICL_EVENT_INTERVAL)
-			{
-				last_jiff = jiffies;
-				queue_apm_event(KRNL_ICL, NULL);
-			}
-#endif
-		}
+		append_to_inbuf_list(urb);

 		if (usb_mux_dispatcher)
 			usb_mux_dispatcher(tty); /* call Liu changhui's func. */
@@ -337,13 +314,6 @@
 		urb->dev = bvd_ipc->ipc_dev;
 		if (usb_submit_urb(urb, GFP_ATOMIC))
 			bvd_dbg("failed resubmitting read urb");
-#if 0
-		if(jiffies - last_jiff > ICL_EVENT_INTERVAL)
-		{
-			last_jiff = jiffies;
-			queue_apm_event(KRNL_ICL, NULL);
-		}
-#endif
 		bvd_dbg("usb_ipc_read_bulk: resubmited read urb");
 	}

@@ -705,7 +675,8 @@
 	bvd_ipc->bulk_out_ep_mux= have_bulk_out_mux;
 	bvd_ipc->ipc_dev = usbdev;
 	bvd_ipc->writesize = writesize;
-	INIT_LIST_HEAD (&bvd_ipc->in_buf_list);
+	INIT_LIST_HEAD(&bvd_ipc->in_buf_list);
+	bvd_ipc->in_buf_lock = SPIN_LOCK_UNLOCKED;

 	bvd_ipc->bh.func = usbipc_bh_func;
 	bvd_ipc->bh.data = (unsigned long) bvd_ipc;
Index: linux-2.6.16/drivers/char/ts0710_mux.c
===================================================================
--- linux-2.6.16.orig/drivers/char/ts0710_mux.c	2007-01-17 00:52:23.000000000 +0100
+++ linux-2.6.16/drivers/char/ts0710_mux.c	2007-01-17 00:52:26.000000000 +0100
@@ -3149,7 +3149,7 @@
 static void receive_worker(void *private_)
 {
 	struct tty_struct *tty = COMM_FOR_MUX_TTY;
-	int i, count;
+	int i, count, tbuf_free, tbuf_read;
 	static unsigned char tbuf[TS0710MUX_MAX_BUF_SIZE];
 	static unsigned char *tbuf_ptr = &tbuf[0];
 	static unsigned char *start_flag = 0;
@@ -3167,29 +3167,39 @@

 	UNUSED_PARAM(private_);

-	if (!tty)
-		return;
+  	if (!tty)
+  		return;
+
+ 	while (1) {
+ 		tbuf_free = TS0710MUX_MAX_BUF_SIZE - (tbuf_ptr - tbuf);
+ 		TS0710_PRINTK("Reading max %i bytes from ts0710_mux_usb inbuf.\n", tbuf_free);
+ 		tbuf_read = get_from_inbuf_list(tbuf_ptr, tbuf_free);
+ 		if (tbuf_read == 0) {
+ 			break;
+ 		} else {
+ 			TS0710_PRINTK("Read %i bytes.\n", tbuf_read);
+ 		};
+ 		tbuf_ptr += tbuf_read;
+ 	};
+
+ 	count = (tbuf_ptr - tbuf);
+
+ 	// Should be impossible?
+ 	//if (count > (TS0710MUX_MAX_BUF_SIZE - (tbuf_ptr - tbuf))) {
+ 	//	TS0710_PRINTK
+ 	//	    ("MUX receive_worker: !!!!! Exceed buffer boundary !!!!!\n");
+ 	//	count = (TS0710MUX_MAX_BUF_SIZE - (tbuf_ptr - tbuf));
+ 	//}

 #ifdef USB_FOR_MUX
-	TS0710_DEBUG("Receive following bytes from IPC-USB");
+ 	TS0710_DEBUG("Received following bytes from IPC-USB");
 #else
-	TS0710_DEBUG("Receive following bytes from UART");
+ 	TS0710_DEBUG("Received following bytes from UART");
 #endif
-
-	TS0710_DEBUGHEX(cp, count);
-
-	if (count > (TS0710MUX_MAX_BUF_SIZE - (tbuf_ptr - tbuf))) {
-		TS0710_PRINTK
-		    ("MUX receive_worker: !!!!! Exceed buffer boundary !!!!!\n");
-		count = (TS0710MUX_MAX_BUF_SIZE - (tbuf_ptr - tbuf));
-	}
-
-	count = tty_buffer_request_room(tty, count);
-
-	for (i = 0; i < count; i++)
-		tty_insert_flip_char(tty, tbuf_ptr[i], TTY_NORMAL);
-
-	tbuf_ptr += count;
+  	TS0710_DEBUGHEX(tbuf, count);
+
+ 	//gets updated above
+ 	//tbuf_ptr += count;
 	search = &tbuf[0];

 	if (test_and_set_bit(RECV_RUNNING, &mux_recv_flags)) {
Index: linux-2.6.16/drivers/char/ts0710_mux_usb.h
===================================================================
--- linux-2.6.16.orig/drivers/char/ts0710_mux_usb.h	2007-01-17 00:52:23.000000000 +0100
+++ linux-2.6.16/drivers/char/ts0710_mux_usb.h	2007-01-17 00:52:26.000000000 +0100
@@ -27,3 +27,6 @@
 extern struct tty_struct *usb_for_mux_tty;
 extern void (*usb_mux_dispatcher)(struct tty_struct *tty);
 extern void (*usb_mux_sender)(void);
+
+extern int get_from_inbuf_list(const unsigned char *buf, int dst_count);
+