From: Magnus Damm <magnus.damm@gmail.com>
To: linux-sh@vger.kernel.org
Subject: [PATCH] sh: reduce Migo-R smc91x overruns
Date: Thu, 09 Oct 2008 09:41:34 +0000 [thread overview]
Message-ID: <20081009094134.6468.88563.sendpatchset@rx1.opensource.se> (raw)
From: Magnus Damm <damm@igel.co.jp>
Improve Migo-R ethernet performance by reducing smc91x overruns.
This is done by enabling SMC91X_NOWAIT and optimizing CS4 setup.
Signed-off-by: Magnus Damm <damm@igel.co.jp>
---
arch/sh/boards/mach-migor/setup.c | 6 ++++--
arch/sh/include/asm/migor.h | 2 ++
2 files changed, 6 insertions(+), 2 deletions(-)
--- 0004/arch/sh/boards/mach-migor/setup.c
+++ work/arch/sh/boards/mach-migor/setup.c 2008-10-09 16:53:01.000000000 +0900
@@ -37,7 +37,7 @@
*/
static struct smc91x_platdata smc91x_info = {
- .flags = SMC91X_USE_16BIT,
+ .flags = SMC91X_USE_16BIT | SMC91X_NOWAIT,
};
static struct resource smc91x_eth_resources[] = {
@@ -463,8 +463,10 @@ static int __init migor_devices_setup(vo
gpio_direction_output(GPIO_PTJ5, 1);
gpio_export(GPIO_PTJ5, 0);
- /* SMC91C111 */
+ /* SMC91C111 - Enable IRQ0, Setup CS4 for 16-bit fast access */
gpio_request(GPIO_FN_IRQ0, NULL);
+ ctrl_outl(0x00003400, BSC_CS4BCR);
+ ctrl_outl(0x00110080, BSC_CS4WCR);
/* KEYSC */
clk_always_enable("mstp214"); /* KEYSC */
--- 0001/arch/sh/include/asm/migor.h
+++ work/arch/sh/include/asm/migor.h 2008-10-09 16:44:46.000000000 +0900
@@ -52,7 +52,9 @@
#define PORT_HIZCRB 0xa405015a
#define PORT_HIZCRC 0xa405015c
+#define BSC_CS4BCR 0xfec10010
#define BSC_CS6ABCR 0xfec1001c
+#define BSC_CS4WCR 0xfec10030
#include <video/sh_mobile_lcdc.h>
reply other threads:[~2008-10-09 9:41 UTC|newest]
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