redonkable
/
alistair23-linux
1
0
Fork 0
Code Releases Activity

[PATCH] i2c: scx200_acb add support for the CS5535/CS5536 

scx200_acb: Add support for the CS5535/CS5536

Signed-off-by: Ben Gardner <bgardner@wabtec.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
hifive-unleashed-5.1
Ben Gardner 2006-01-18 22:48:26 +01:00 committed by Greg Kroah-Hartman
parent 8a05940d74
commit 16ffc5c995
1 changed files with 43 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

57
drivers/i2c/busses/scx200_acb.c
View File

@ -2,6 +2,7 @@
Copyright (c) 2001,2002 Christer Weinigel <wingel@nano-system.com>
National Semiconductor SCx200 ACCESS.bus support
Also supports the AMD CS5535 and AMD CS5536
Based on i2c-keywest.c which is:
Copyright (c) 2001 Benjamin Herrenschmidt <benh@kernel.crashing.org>
@ -31,6 +32,7 @@
#include <linux/pci.h>
#include <linux/delay.h>
#include <asm/io.h>
#include <asm/msr.h>
#include <linux/scx200.h>
@ -416,7 +418,7 @@ static int scx200_acb_probe(struct scx200_acb_iface *iface)
return 0;
}
static int __init scx200_acb_create(int base, int index)
static int __init scx200_acb_create(const char *text, int base, int index)
{
struct scx200_acb_iface *iface;
struct i2c_adapter *adapter;
@ -432,7 +434,7 @@ static int __init scx200_acb_create(int base, int index)
adapter = &iface->adapter;
i2c_set_adapdata(adapter, iface);
snprintf(adapter->name, I2C_NAME_SIZE, "SCx200 ACB%d", index);
snprintf(adapter->name, I2C_NAME_SIZE, "%s ACB%d", text, index);
adapter->owner = THIS_MODULE;
adapter->id = I2C_HW_SMBUS_SCX200;
adapter->algo = &scx200_acb_algorithm;
@ -440,8 +442,9 @@ static int __init scx200_acb_create(int base, int index)
init_MUTEX(&iface->sem);
snprintf(description, sizeof(description),
"NatSemi SCx200 ACCESS.bus [%s]", adapter->name);
snprintf(description, sizeof(description), "%s ACCESS.bus [%s]",
text, adapter->name);
if (request_region(base, 8, description) == 0) {
printk(KERN_ERR NAME ": can't allocate io 0x%x-0x%x\n",
base, base + 8-1);
@ -485,24 +488,50 @@ static struct pci_device_id scx200[] = {
{ },
};
static struct pci_device_id divil_pci[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_CS5535_ISA) },
{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_ISA) },
{ } /* NULL entry */
};
#define MSR_LBAR_SMB 0x5140000B
static int scx200_add_cs553x(void)
{
u32 low, hi;
u32 smb_base;
/* Grab & reserve the SMB I/O range */
rdmsr(MSR_LBAR_SMB, low, hi);
/* Check the IO mask and whether SMB is enabled */
if (hi != 0x0000F001) {
printk(KERN_WARNING NAME ": SMBus not enabled\n");
return -ENODEV;
}
/* SMBus IO size is 8 bytes */
smb_base = low & 0x0000FFF8;
return scx200_acb_create("CS5535", smb_base, 0);
}
static int __init scx200_acb_init(void)
{
int i;
int rc;
int rc = -ENODEV;
pr_debug(NAME ": NatSemi SCx200 ACCESS.bus Driver\n");
/* Verify that this really is a SCx200 processor */
if (pci_dev_present(scx200) == 0)
return -ENODEV;
if (pci_dev_present(scx200)) {
for (i = 0; i < MAX_DEVICES; ++i) {
if (base[i] > 0)
rc = scx200_acb_create("SCx200", base[i], i);
}
} else if (pci_dev_present(divil_pci))
rc = scx200_add_cs553x();
rc = -ENXIO;
for (i = 0; i < MAX_DEVICES; ++i) {
if (base[i] > 0)
rc = scx200_acb_create(base[i], i);
}
if (scx200_acb_list)
return 0;
return rc;
}