diff options
Diffstat (limited to 'drivers/i2c')
| -rw-r--r-- | drivers/i2c/busses/scx200_acb.c | 57 |
1 files changed, 43 insertions, 14 deletions
diff --git a/drivers/i2c/busses/scx200_acb.c b/drivers/i2c/busses/scx200_acb.c index 02150bb25d43..0ae77f84ffe8 100644 --- a/drivers/i2c/busses/scx200_acb.c +++ b/drivers/i2c/busses/scx200_acb.c @@ -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; } |