X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=kernel%2Fdrivers%2Fi2c%2Fbusses%2Fi2c-i801.c;fp=kernel%2Fdrivers%2Fi2c%2Fbusses%2Fi2c-i801.c;h=27fa0cb09538cebfd0f9388112cfe30abb773edd;hb=e09b41010ba33a20a87472ee821fa407a5b8da36;hp=5ecbb3fdc27ee2c0c8c87e35cc4aa08d9621bb3f;hpb=f93b97fd65072de626c074dbe099a1fff05ce060;p=kvmfornfv.git diff --git a/kernel/drivers/i2c/busses/i2c-i801.c b/kernel/drivers/i2c/busses/i2c-i801.c index 5ecbb3fdc..27fa0cb09 100644 --- a/kernel/drivers/i2c/busses/i2c-i801.c +++ b/kernel/drivers/i2c/busses/i2c-i801.c @@ -60,6 +60,10 @@ * BayTrail (SOC) 0x0f12 32 hard yes yes yes * Sunrise Point-H (PCH) 0xa123 32 hard yes yes yes * Sunrise Point-LP (PCH) 0x9d23 32 hard yes yes yes + * DNV (SOC) 0x19df 32 hard yes yes yes + * Broxton (SOC) 0x5ad4 32 hard yes yes yes + * Lewisburg (PCH) 0xa1a3 32 hard yes yes yes + * Lewisburg Supersku (PCH) 0xa223 32 hard yes yes yes * * Features supported by this driver: * Software PEC no @@ -88,12 +92,13 @@ #include #include #include +#include +#include #if (defined CONFIG_I2C_MUX_GPIO || defined CONFIG_I2C_MUX_GPIO_MODULE) && \ defined CONFIG_DMI #include #include -#include #endif /* I801 SMBus address offsets */ @@ -113,6 +118,16 @@ #define SMBPCICTL 0x004 #define SMBPCISTS 0x006 #define SMBHSTCFG 0x040 +#define TCOBASE 0x050 +#define TCOCTL 0x054 + +#define ACPIBASE 0x040 +#define ACPIBASE_SMI_OFF 0x030 +#define ACPICTRL 0x044 +#define ACPICTRL_EN 0x080 + +#define SBREG_BAR 0x10 +#define SBREG_SMBCTRL 0xc6000c /* Host status bits for SMBPCISTS */ #define SMBPCISTS_INTS 0x08 @@ -125,6 +140,9 @@ #define SMBHSTCFG_SMB_SMI_EN 2 #define SMBHSTCFG_I2C_EN 4 +/* TCO configuration bits for TCOCTL */ +#define TCOCTL_EN 0x0100 + /* Auxiliary control register bits, ICH4+ only */ #define SMBAUXCTL_CRC 1 #define SMBAUXCTL_E32B 2 @@ -188,6 +206,10 @@ #define PCI_DEVICE_ID_INTEL_WILDCATPOINT_LP_SMBUS 0x9ca2 #define PCI_DEVICE_ID_INTEL_SUNRISEPOINT_H_SMBUS 0xa123 #define PCI_DEVICE_ID_INTEL_SUNRISEPOINT_LP_SMBUS 0x9d23 +#define PCI_DEVICE_ID_INTEL_DNV_SMBUS 0x19df +#define PCI_DEVICE_ID_INTEL_BROXTON_SMBUS 0x5ad4 +#define PCI_DEVICE_ID_INTEL_LEWISBURG_SMBUS 0xa1a3 +#define PCI_DEVICE_ID_INTEL_LEWISBURG_SSKU_SMBUS 0xa223 struct i801_mux_config { char *gpio_chip; @@ -221,6 +243,7 @@ struct i801_priv { const struct i801_mux_config *mux_drvdata; struct platform_device *mux_pdev; #endif + struct platform_device *tco_pdev; }; #define FEATURE_SMBUS_PEC (1 << 0) @@ -230,6 +253,7 @@ struct i801_priv { #define FEATURE_IRQ (1 << 4) /* Not really a feature, but it's convenient to handle it as such */ #define FEATURE_IDF (1 << 15) +#define FEATURE_TCO (1 << 16) static const char *i801_feature_names[] = { "SMBus PEC", @@ -847,6 +871,10 @@ static const struct pci_device_id i801_ids[] = { { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BRASWELL_SMBUS) }, { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SUNRISEPOINT_H_SMBUS) }, { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SUNRISEPOINT_LP_SMBUS) }, + { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_DNV_SMBUS) }, + { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BROXTON_SMBUS) }, + { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_LEWISBURG_SMBUS) }, + { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_LEWISBURG_SSKU_SMBUS) }, { 0, } }; @@ -1132,6 +1160,95 @@ static inline unsigned int i801_get_adapter_class(struct i801_priv *priv) } #endif +static const struct itco_wdt_platform_data tco_platform_data = { + .name = "Intel PCH", + .version = 4, +}; + +static DEFINE_SPINLOCK(p2sb_spinlock); + +static void i801_add_tco(struct i801_priv *priv) +{ + struct pci_dev *pci_dev = priv->pci_dev; + struct resource tco_res[3], *res; + struct platform_device *pdev; + unsigned int devfn; + u32 tco_base, tco_ctl; + u32 base_addr, ctrl_val; + u64 base64_addr; + + if (!(priv->features & FEATURE_TCO)) + return; + + pci_read_config_dword(pci_dev, TCOBASE, &tco_base); + pci_read_config_dword(pci_dev, TCOCTL, &tco_ctl); + if (!(tco_ctl & TCOCTL_EN)) + return; + + memset(tco_res, 0, sizeof(tco_res)); + + res = &tco_res[ICH_RES_IO_TCO]; + res->start = tco_base & ~1; + res->end = res->start + 32 - 1; + res->flags = IORESOURCE_IO; + + /* + * Power Management registers. + */ + devfn = PCI_DEVFN(PCI_SLOT(pci_dev->devfn), 2); + pci_bus_read_config_dword(pci_dev->bus, devfn, ACPIBASE, &base_addr); + + res = &tco_res[ICH_RES_IO_SMI]; + res->start = (base_addr & ~1) + ACPIBASE_SMI_OFF; + res->end = res->start + 3; + res->flags = IORESOURCE_IO; + + /* + * Enable the ACPI I/O space. + */ + pci_bus_read_config_dword(pci_dev->bus, devfn, ACPICTRL, &ctrl_val); + ctrl_val |= ACPICTRL_EN; + pci_bus_write_config_dword(pci_dev->bus, devfn, ACPICTRL, ctrl_val); + + /* + * We must access the NO_REBOOT bit over the Primary to Sideband + * bridge (P2SB). The BIOS prevents the P2SB device from being + * enumerated by the PCI subsystem, so we need to unhide/hide it + * to lookup the P2SB BAR. + */ + spin_lock(&p2sb_spinlock); + + devfn = PCI_DEVFN(PCI_SLOT(pci_dev->devfn), 1); + + /* Unhide the P2SB device */ + pci_bus_write_config_byte(pci_dev->bus, devfn, 0xe1, 0x0); + + pci_bus_read_config_dword(pci_dev->bus, devfn, SBREG_BAR, &base_addr); + base64_addr = base_addr & 0xfffffff0; + + pci_bus_read_config_dword(pci_dev->bus, devfn, SBREG_BAR + 0x4, &base_addr); + base64_addr |= (u64)base_addr << 32; + + /* Hide the P2SB device */ + pci_bus_write_config_byte(pci_dev->bus, devfn, 0xe1, 0x1); + spin_unlock(&p2sb_spinlock); + + res = &tco_res[ICH_RES_MEM_OFF]; + res->start = (resource_size_t)base64_addr + SBREG_SMBCTRL; + res->end = res->start + 3; + res->flags = IORESOURCE_MEM; + + pdev = platform_device_register_resndata(&pci_dev->dev, "iTCO_wdt", -1, + tco_res, 3, &tco_platform_data, + sizeof(tco_platform_data)); + if (IS_ERR(pdev)) { + dev_warn(&pci_dev->dev, "failed to create iTCO device\n"); + return; + } + + priv->tco_pdev = pdev; +} + static int i801_probe(struct pci_dev *dev, const struct pci_device_id *id) { unsigned char temp; @@ -1146,9 +1263,24 @@ static int i801_probe(struct pci_dev *dev, const struct pci_device_id *id) priv->adapter.owner = THIS_MODULE; priv->adapter.class = i801_get_adapter_class(priv); priv->adapter.algo = &smbus_algorithm; + priv->adapter.dev.parent = &dev->dev; + ACPI_COMPANION_SET(&priv->adapter.dev, ACPI_COMPANION(&dev->dev)); + priv->adapter.retries = 3; priv->pci_dev = dev; switch (dev->device) { + case PCI_DEVICE_ID_INTEL_SUNRISEPOINT_H_SMBUS: + case PCI_DEVICE_ID_INTEL_SUNRISEPOINT_LP_SMBUS: + case PCI_DEVICE_ID_INTEL_LEWISBURG_SMBUS: + case PCI_DEVICE_ID_INTEL_LEWISBURG_SSKU_SMBUS: + case PCI_DEVICE_ID_INTEL_DNV_SMBUS: + priv->features |= FEATURE_I2C_BLOCK_READ; + priv->features |= FEATURE_IRQ; + priv->features |= FEATURE_SMBUS_PEC; + priv->features |= FEATURE_BLOCK_BUFFER; + priv->features |= FEATURE_TCO; + break; + case PCI_DEVICE_ID_INTEL_PATSBURG_SMBUS_IDF0: case PCI_DEVICE_ID_INTEL_PATSBURG_SMBUS_IDF1: case PCI_DEVICE_ID_INTEL_PATSBURG_SMBUS_IDF2: @@ -1265,11 +1397,7 @@ static int i801_probe(struct pci_dev *dev, const struct pci_device_id *id) dev_info(&dev->dev, "SMBus using %s\n", priv->features & FEATURE_IRQ ? "PCI interrupt" : "polling"); - /* set up the sysfs linkage to our parent device */ - priv->adapter.dev.parent = &dev->dev; - - /* Retry up to 3 times on lost arbitration */ - priv->adapter.retries = 3; + i801_add_tco(priv); snprintf(priv->adapter.name, sizeof(priv->adapter.name), "SMBus I801 adapter at %04lx", priv->smba); @@ -1296,6 +1424,8 @@ static void i801_remove(struct pci_dev *dev) i2c_del_adapter(&priv->adapter); pci_write_config_byte(dev, SMBHSTCFG, priv->original_hstcfg); + platform_device_unregister(priv->tco_pdev); + /* * do not call pci_disable_device(dev) since it can cause hard hangs on * some systems during power-off (eg. Fujitsu-Siemens Lifebook E8010)