Attachment 299809 Details for Bug 438471 – Kernel: IBM RTL driver

Kernel: IBM RTL driver

patch-rtl-rh-v2 (text/plain), 7.15 KB, created by IBM Bug Proxy on 2008-04-01 02:40:46 UTC

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Creator: IBM Bug Proxy

Created: 2008-04-01 02:40:46 UTC

Size: 7.15 KB

patch

obsolete

>diff -urN kernel-2.6.24.3-work.orig/configs/kernel-2.6.24.3-x86_64-rt.config linux-2.6.24.3.x86_64/configs/kernel-2.6.24.3-x86_64-rt.config
>--- kernel-2.6.24.3-work.orig/configs/kernel-2.6.24.3-x86_64-rt.config	2008-03-15 15:59:10.000000000 -0700
>+++ linux-2.6.24.3.x86_64/configs/kernel-2.6.24.3-x86_64-rt.config	2008-03-15 12:46:32.000000000 -0700
>@@ -1031,6 +1031,7 @@
> # CONFIG_CDROM_PKTCDVD_WCACHE is not set
> CONFIG_ATA_OVER_ETH=m
> CONFIG_MISC_DEVICES=y
>+CONFIG_IBM_RTL=m
> # CONFIG_IBM_ASM is not set
> CONFIG_PHANTOM=m
> CONFIG_EEPROM_93CX6=m
>diff -urN kernel-2.6.24.3-work.orig/drivers/misc/ibmrtl/ibm_rtl.c linux-2.6.24.3.x86_64/drivers/misc/ibmrtl/ibm_rtl.c
>--- kernel-2.6.24.3-work.orig/drivers/misc/ibmrtl/ibm_rtl.c	1969-12-31 16:00:00.000000000 -0800
>+++ linux-2.6.24.3.x86_64/drivers/misc/ibmrtl/ibm_rtl.c	2008-03-31 08:33:25.000000000 -0700
>@@ -0,0 +1,181 @@
>+#include <linux/kernel.h>
>+#include <linux/delay.h>
>+#include <linux/module.h>
>+#include <linux/io.h>
>+#include <linux/sysdev.h>
>+
>+#include "rtl.h"
>+static unsigned int table_addr;
>+
>+int ibm_rtl_write(u8 value) 
>+{
>+	int ret = 0;
>+	void __iomem *rtl;
>+
>+	/* only valid value is 0 and 1 */
>+	if (value > 1) {
>+		ret = -EINVAL;
>+		goto err_out;
>+	}
>+
>+	rtl = ioremap(table_addr,RTL_TABLE_SIZE);
>+
>+	if (!rtl) {
>+		printk ("could not map table\n");
>+		ret = -ENOMEM;
>+		goto err_out;
>+	}
>+
>+	if (readb(rtl+RTL_STATE) != value) {
>+		if (value == 1)
>+			writeb(1,(rtl+RTL_CMD));
>+		else
>+			writeb(2,(rtl+RTL_CMD));
>+
>+		/*write special command*/
>+		outb(bios_to_value(rtl, RTL_CMD_PORT_VALUE), 
>+			bios_to_value(rtl, RTL_CMD_PORT_ADDR));
>+
>+		while (readb(rtl+RTL_CMD)) {
>+			msleep(10);
>+		}
>+		
>+		if (readb(rtl+RTL_CMD_STATUS)) 
>+			ret = -EIO;
>+	}
>+		
>+	iounmap(rtl);
>+err_out:
>+	return ret;
>+}
>+
>+static ssize_t rtl_show_version (struct sysdev_class * dev, char * buf)
>+{
>+	int ret;
>+	void  __iomem *rtl;
>+
>+	rtl = ioremap(table_addr,RTL_TABLE_SIZE);
>+		
>+	if (!rtl) {
>+		ret = -ENOMEM;
>+		goto err_out;
>+	}
>+	ret = sprintf(buf, "%d\n",(int)readb(rtl+RTL_VERSION));
>+	
>+	iounmap(rtl);
>+err_out:
>+	return ret;
>+}
>+
>+static ssize_t rtl_show_state (struct sysdev_class * dev, char * buf)
>+{
>+	int ret;
>+	void __iomem *rtl;
>+
>+	rtl = ioremap(table_addr,RTL_TABLE_SIZE);
>+		
>+	if (!rtl) {
>+		printk ("could not map table\n");
>+		ret = -ENOMEM;
>+		goto err_out;
>+	}
>+	ret = sprintf(buf, "%d\n",readb(rtl+RTL_STATE));
>+	
>+	iounmap(rtl);
>+err_out:
>+	return ret;
>+}
>+
>+static ssize_t rtl_set_state(struct sysdev_class * dev, const char * buf, size_t size)
>+{
>+	ssize_t ret;
>+	switch (buf[0]) {
>+	case '0':
>+		ret = ibm_rtl_write(0);
>+		break;
>+	case '1':
>+		ret = ibm_rtl_write(1);
>+		break; 
>+	default:
>+		ret = -EINVAL;
>+	} 
>+	if (ret >= 0)
>+		ret = size;
>+
>+	return ret;
>+}
>+
>+static struct sysdev_class class_rtl = {
>+	set_kset_name("ibm_rtl"),
>+};
>+
>+static SYSDEV_CLASS_ATTR(version, S_IRUGO, rtl_show_version, NULL); 
>+static SYSDEV_CLASS_ATTR(state, 0600, rtl_show_state, rtl_set_state);
>+
>+static struct sysdev_class_attribute *rtl_attributes[] = {
>+	&attr_version,
>+	&attr_state,
>+	NULL
>+};
>+
>+
>+static int rtl_setup_sysfs(void) {
>+	int ret,i;
>+	ret = sysdev_class_register(&class_rtl);
>+	
>+	if (!ret) {
>+		for (i = 0; rtl_attributes[i]; i ++)
>+			sysdev_class_create_file(&class_rtl, rtl_attributes[i]);
>+	}
>+	return ret;
>+}
>+
>+static void rtl_teardown_sysfs(void) {
>+	int i;
>+	for (i = 0; rtl_attributes[i]; i ++)
>+		sysdev_class_remove_file(&class_rtl, rtl_attributes[i]);
>+	sysdev_class_unregister(&class_rtl);
>+	return;;
>+}
>+
>+/* only allow the modules to load if the _RTL_ table can be found*/
>+int init_module(void) {
>+	unsigned long ebda_addr,ebda_size;
>+	void __iomem *data, *d;
>+	int ret,i;
>+	
>+	/*get the address for the RTL table from the EBDA */
>+	ebda_addr = *(unsigned short *)phys_to_virt(0x40E);
>+	ebda_addr <<= 4;
>+	ebda_size = 64*1024;
>+	
>+	data = ioremap(ebda_addr,ebda_size);
>+	d = data;	
>+	if (!data) {
>+		ret = -ENOMEM;
>+		goto exit;
>+	}
>+
>+	for (i = 0 ; i < ebda_size/4; i ++) {
>+		unsigned int *tmp = (unsigned int *) data++;
>+		if (*tmp == RTL_MAGIC_IDENT) {
>+			table_addr = ebda_addr + i;
>+			ret = rtl_setup_sysfs();
>+			goto exit; 
>+		}
>+	}
>+
>+	ret = -ENODEV;	
>+
>+exit:	
>+	iounmap(d);
>+	return ret;
>+}
>+
>+void cleanup_module(void)
>+{
>+	rtl_teardown_sysfs();
>+}
>+
>+MODULE_LICENSE("GPL");
>+
>diff -urN kernel-2.6.24.3-work.orig/drivers/misc/ibmrtl/Makefile linux-2.6.24.3.x86_64/drivers/misc/ibmrtl/Makefile
>--- kernel-2.6.24.3-work.orig/drivers/misc/ibmrtl/Makefile	1969-12-31 16:00:00.000000000 -0800
>+++ linux-2.6.24.3.x86_64/drivers/misc/ibmrtl/Makefile	2008-03-15 12:46:32.000000000 -0700
>@@ -0,0 +1 @@
>+obj-$(CONFIG_IBM_RTL) := ibm_rtl.o
>diff -urN kernel-2.6.24.3-work.orig/drivers/misc/ibmrtl/rtl.h linux-2.6.24.3.x86_64/drivers/misc/ibmrtl/rtl.h
>--- kernel-2.6.24.3-work.orig/drivers/misc/ibmrtl/rtl.h	1969-12-31 16:00:00.000000000 -0800
>+++ linux-2.6.24.3.x86_64/drivers/misc/ibmrtl/rtl.h	2008-03-31 08:33:40.000000000 -0700
>@@ -0,0 +1,26 @@
>+#include <linux/io.h>
>+
>+/* The RTL table looks something like
>+	u8 signature[5];
>+	u8 version;
>+	u8 RT_Status;
>+	u8 Command;
>+	u8 CommandStatus;
>+	u8 CMDAddressType;
>+	u8 CmdGranularity;
>+	u8 CmdOffset;
>+	u16 Reserve1;
>+	u8 CmdPortAddress[4];
>+	u8 CmdPortValue[4];
>+*/
>+#define RTL_TABLE_SIZE 0x16
>+#define RTL_MAGIC_IDENT (('L'<<24)|('T'<<16)|('R'<<8)|'_')
>+#define RTL_VERSION 0x5
>+#define RTL_STATE 0x6
>+#define RTL_CMD 0x7
>+#define RTL_CMD_STATUS 0x8
>+#define RTL_CMD_PORT_ADDR 0xE
>+#define RTL_CMD_PORT_VALUE 0x12
>+
>+/*needed to decode CmdPortAddress and CmdPortValue*/
>+#define bios_to_value(rtl, offset) (u32)((readb(rtl+(offset+1)) << 8) + readb(rtl+offset)) 
>diff -urN kernel-2.6.24.3-work.orig/drivers/misc/Kconfig linux-2.6.24.3.x86_64/drivers/misc/Kconfig
>--- kernel-2.6.24.3-work.orig/drivers/misc/Kconfig	2008-03-15 15:54:00.000000000 -0700
>+++ linux-2.6.24.3.x86_64/drivers/misc/Kconfig	2008-03-15 12:46:32.000000000 -0700
>@@ -13,6 +13,23 @@
> 
> if MISC_DEVICES
> 
>+config IBM_RTL
>+	tristate "Device driver to enable PRTL support"
>+	depends on X86 && PCI
>+	---help---
>+	  Enable support for IBM Preimium Real Time Mode (PRTM). 
>+	  This module will allow you the enter and exit PRTM in the BIOS via 
>+	  sysfs on platforms that support this feature.  System in PRTM will 
>+	  not recive cpu generated SMIs for recoverable errors.  Use of this 
>+	  feature without proper support may void your hardware warrenty. 
>+	  
>+	  If the proper bios support is found the driver will load and create
>+	  /sys/devices/system/ibm_rtl/.  The "state" varable will indicate 
>+	  weather or not the BIOS is in PRTM. 
>+	  state = 0 (BIOS SMI's on) 
>+	  state = 1 (BIOS SMI's off) 
>+	
>+
> config IBM_ASM
> 	tristate "Device driver for IBM RSA service processor"
> 	depends on X86 && PCI && INPUT && EXPERIMENTAL
>diff -urN kernel-2.6.24.3-work.orig/drivers/misc/Makefile linux-2.6.24.3.x86_64/drivers/misc/Makefile
>--- kernel-2.6.24.3-work.orig/drivers/misc/Makefile	2008-03-15 15:54:00.000000000 -0700
>+++ linux-2.6.24.3.x86_64/drivers/misc/Makefile	2008-03-15 12:46:32.000000000 -0700
>@@ -4,6 +4,7 @@
> obj- := misc.o	# Dummy rule to force built-in.o to be made
> 
> obj-$(CONFIG_IBM_ASM)		+= ibmasm/
>+obj-$(CONFIG_IBM_RTL)		+= ibmrtl/
> obj-$(CONFIG_HDPU_FEATURES)	+= hdpuftrs/
> obj-$(CONFIG_MSI_LAPTOP)     += msi-laptop.o
> obj-$(CONFIG_ASUS_LAPTOP)     += asus-laptop.o

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Attachments on bug 438471: 299808 | 299809 | 299810 | 299811 | 299812