How to use ttyUL0 as input and use VGA as display?

How to use ttyUL0 as input and use VGA as display?

[yanlong wang]
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Re: How to use ttyUL0 as input and use VGA as display?

[Anatolij Gustschin]

Hi,

yanlong wang wrote:

>      I port the linux on my ml300 board , the system is work well. But
> have some small problem.
>     I want use  serial port as input device  and use VGA as display.
>     How i set the console parameter?
>     If i set console like this " console=ttyUL0,9600 console=tty0
> root=/dev/ram". The boot message display on both of  serial port and
> VGA. But when the system come to the "sh".There is no output on ttyUL0
> ,.All message display on the VGA , then Ｉcann't input command by
> serial port .
>     How to slove this probelm?

Did you try to pass ttyUL0 after tty0?
Try "root=/dev/ram console=tty0 console=ttyUL0,9600".

Best regards,
Anatolij

Re: How to use ttyUL0 as input and use VGA as display?

[wangyanlong]

Hi,
   Thanks for all your replies :)
   if  i set console like this " console=tty0 console=ttyUL0,9600 
root=/dev/ram". The boot message display on both of  serial port and VGA.
But when the system come to the "sh", the VGA display no change at all ,and
all message comeout on serial port.The words i type only show on the serial
port , the VGA is no change:(
   regards:)
yanlong
-- 
View this message in context: http://www.nabble.com/How-to-use-ttyUL0-as-input-and-use-VGA-as-display--tp19010756p19012924.html
Sent from the linuxppc-embedded mailing list archive at Nabble.com.

U-boot and Xilinx emaclite, TX_PING_PONG -> stops working

[Philipp Hachtmann]

Hi all,

I use a Xilinx Virtex-4FX (with powerpc) Board (Ml403) with U-boot and
Linux.

I am currently wondering if someone has experience with the emaclite
driver. When I unset the "ping pong" (double buffering) parameters of
the core, I can use it unter Linux and U-boot. But the performance is
near to non-functional (wget tells me about 10kByte/sec).
Then I switched to double buffering. Now it runs very well - but only
under Linux.

I found a driver (xilinx_emaclite.c) in the U-boot git. That completely
refuses to work correctly (of course with parameters corrected). The
other driver I once found "somewhere" (in the Petalinux distribution).
It at least worked without the double buffering. Both drivers talk about
the ping pong options in their source, so I think they *should* know
about it.


Does anyone know that problem? Is there an improved driver around?

Best wishes,

Philipp





-- 
http://www.hachti.de

Re: U-boot and Xilinx emaclite, TX_PING_PONG -> stops working

[jozsef imrek]

[-- Attachment #1: Type: TEXT/PLAIN, Size: 1617 bytes --]


dear philipp,


On Sat, 16 Aug 2008, Philipp Hachtmann wrote:

> I am currently wondering if someone has experience with the emaclite
> driver. When I unset the "ping pong" (double buffering) parameters of
> ...
>
> I found a driver (xilinx_emaclite.c) in the U-boot git. That completely
> refuses to work correctly (of course with parameters corrected). The
> other driver I once found "somewhere" (in the Petalinux distribution).

i don't know what exact versions are you using. for me the following
combination works reasonably both with tx-ping-pong = rx-ping-pong = 0
and with tx-ping-pong = rx-ping-pong = 1, both under u-boot and
linux (i'm normally using ping-pong = 1, i've only made a quick test
with ping-pong = 0):

- edk 9.1, opb_ethernetlite v1.01.b, v4-fx12 (memec/avnet minimodule)
- u-boot: ftp://ftp.denx.de/pub/u-boot/u-boot-1.3.3.tar.bz2
- linux: xilinx's git://git.xilinx.com/linux-2.6-xlnx, 2.6.26-rc6


also, i think there is a bug in the linux driver: the XEmacLite_Config
structure used to set up the device is located on the stack. so
after the init returns, further references to this struct by the
os independent part of the driver are invalid. see the attached
patch. i don't know if it solves your prolem, though..

(the patch also replaces a few calls of dev_kfree_skb() from
interrupt context. thoose can generate lots of warnings on the
console, thus slowing down operation.)


-- 
mazsi

----------------------------------------------------------------
strawberry fields forever!                       mazsi@imrek.org
----------------------------------------------------------------

[-- Attachment #2: Type: TEXT/x-diff, Size: 3339 bytes --]

diff --git a/drivers/net/xilinx_emaclite/adapter.c b/drivers/net/xilinx_emaclite/adapter.c
index ed7a947..2a50e29 100644
--- a/drivers/net/xilinx_emaclite/adapter.c
+++ b/drivers/net/xilinx_emaclite/adapter.c
@@ -100,6 +100,7 @@ struct net_local {
 	 * data as an opaque object in this file (meaning that we never
 	 * reference any of the fields inside of the structure).
 	 */
+	XEmacLite_Config Config;
 	XEmacLite EmacLite;
 
 	void *desc_space;
@@ -168,7 +169,7 @@ static void reset(struct net_device *dev, DUPLEX duplex)
 	XEmacLite_EnableInterrupts(&lp->EmacLite);
 
 	if (lp->deferred_skb) {
-		dev_kfree_skb(lp->deferred_skb);
+		dev_kfree_skb_any(lp->deferred_skb);
 		lp->deferred_skb = NULL;
 		lp->stats.tx_errors++;
 	}
@@ -279,7 +280,7 @@ static int xemaclite_Send(struct sk_buff *orig_skb, struct net_device *dev)
 	spin_unlock_irqrestore(&reset_lock, flags);
 
 	lp->stats.tx_bytes += len;
-	dev_kfree_skb(new_skb);
+	dev_kfree_skb_any(new_skb);
 	dev->trans_start = jiffies;
 
 	return 0;
@@ -298,7 +299,7 @@ static void SendHandler(void *CallbackRef)
 			return;
 		}
 		else {
-			dev_kfree_skb(lp->deferred_skb);
+			dev_kfree_skb_any(lp->deferred_skb);
 			lp->deferred_skb = NULL;
 			netif_wake_queue(dev);
 		}
@@ -354,7 +355,7 @@ static void RecvHandler(void *CallbackRef)
 	if (!len) {
 
 		lp->stats.rx_errors++;
-		dev_kfree_skb(skb);
+		dev_kfree_skb_any(skb);
 		//printk(KERN_ERR "%s: Could not receive buffer\n",dev->name);
 		spin_lock(&reset_lock);
 		//reset(dev, UNKNOWN_DUPLEX);
@@ -438,8 +439,6 @@ static int xemaclite_setup(
 
 	u32 virt_baddr;		/* virtual base address of emac */
 
-	XEmacLite_Config Config;
-
 	struct net_device *ndev = NULL;
 	struct net_local *lp = NULL;
 
@@ -471,9 +470,9 @@ static int xemaclite_setup(
 	lp->ndev = ndev;
 
 	/* Setup the Config structure for the XEmacLite_CfgInitialize() call. */
-	Config.BaseAddress	= r_mem->start;	/* Physical address */
-	Config.TxPingPong	= pdata->tx_ping_pong;
-	Config.RxPingPong	= pdata->rx_ping_pong;
+	lp->Config.BaseAddress	= r_mem->start;	/* Physical address */
+	lp->Config.TxPingPong	= pdata->tx_ping_pong;
+	lp->Config.RxPingPong	= pdata->rx_ping_pong;
 
 
 	/* Get the virtual base address for the device */
@@ -485,7 +484,7 @@ static int xemaclite_setup(
 	}
 
 
-	if (XEmacLite_CfgInitialize(&lp->EmacLite, &Config, virt_baddr) != XST_SUCCESS) {
+	if (XEmacLite_CfgInitialize(&lp->EmacLite, &lp->Config, virt_baddr) != XST_SUCCESS) {
 		dev_err(dev, "XEmacLite: Could not initialize device.\n");
 		rc = -ENODEV;
 		goto error;
@@ -498,12 +497,12 @@ static int xemaclite_setup(
         XEmacLite_SetMacAddress(&lp->EmacLite, ndev->dev_addr);
 
 	dev_info(dev,
-			"MAC address is now %2x:%2x:%2x:%2x:%2x:%2x\n",
+			"MAC address is now %02x:%02x:%02x:%02x:%02x:%02x\n",
 			pdata->mac_addr[0], pdata->mac_addr[1],
 			pdata->mac_addr[2], pdata->mac_addr[3],
 			pdata->mac_addr[4], pdata->mac_addr[5]);
 
-	dev_err(dev, "using fifo mode.\n");
+	dev_err(dev, "using fifo mode, tx-ping-pong=%d, rx-ping-pong=%d.\n", lp->Config.TxPingPong, lp->Config.RxPingPong);
 	XEmacLite_SetRecvHandler(&lp->EmacLite, ndev, RecvHandler);
 	XEmacLite_SetSendHandler(&lp->EmacLite, ndev, SendHandler);
 	ndev->hard_start_xmit = xemaclite_Send;

Re: How to use ttyUL0 as input and use VGA as display?

[wangyanlong]

Hi,
   Thanks for all your replies :)
   if  i set console like this " console=tty0 console=ttyUL0,9600 
root=/dev/ram". The boot message display on both of  serial port and VGA.
But when the system come to the "sh", the VGA display no change at all ,and
all message comeout on serial port.The words i type only show on the serial
port , the VGA is no change:(
   regards:)
yanlong
-- 
View this message in context: http://www.nabble.com/How-to-use-ttyUL0-as-input-and-use-VGA-as-display--tp19010756p19026472.html
Sent from the linuxppc-embedded mailing list archive at Nabble.com.

Re: U-boot and Xilinx emaclite, TX_PING_PONG -> stops working

[Michal Simek]

Hi Philipp,

I did U-BOOT driver for emaclite. You can set both ping pong mode - all
combination are supported. I tested this driver with Microblaze and works well.
I use this driver almost every day and I have no problem with it. If you have
problem with this driver please send your email to u-boot mailing list.

Regards,
Michal


> Hi all,
> 
> I use a Xilinx Virtex-4FX (with powerpc) Board (Ml403) with U-boot and
> Linux.
> 
> I am currently wondering if someone has experience with the emaclite
> driver. When I unset the "ping pong" (double buffering) parameters of
> the core, I can use it unter Linux and U-boot. But the performance is
> near to non-functional (wget tells me about 10kByte/sec).
> Then I switched to double buffering. Now it runs very well - but only
> under Linux.
> 
> I found a driver (xilinx_emaclite.c) in the U-boot git. That completely
> refuses to work correctly (of course with parameters corrected). The
> other driver I once found "somewhere" (in the Petalinux distribution).
> It at least worked without the double buffering. Both drivers talk about
> the ping pong options in their source, so I think they *should* know
> about it.
> 
> 
> Does anyone know that problem? Is there an improved driver around?
> 
> Best wishes,
> 
> Philipp
> 
> 
> 
> 
>