#include <linux/slab.h>
#include <linux/wait.h>
#include <linux/err.h>
+#include <linux/platform_device.h>
+#include <linux/platform_data/itco_wdt.h>
#if (defined CONFIG_I2C_MUX_GPIO || defined CONFIG_I2C_MUX_GPIO_MODULE) && \
defined CONFIG_DMI
#include <linux/gpio.h>
#include <linux/i2c-mux-gpio.h>
-#include <linux/platform_device.h>
#endif
/* I801 SMBus address offsets */
#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
#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
const struct i801_mux_config *mux_drvdata;
struct platform_device *mux_pdev;
#endif
+ struct platform_device *tco_pdev;
};
#define FEATURE_SMBUS_PEC (1 << 0)
#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",
}
#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;
priv->pci_dev = dev;
switch (dev->device) {
+ case PCI_DEVICE_ID_INTEL_SUNRISEPOINT_H_SMBUS:
+ case PCI_DEVICE_ID_INTEL_SUNRISEPOINT_LP_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:
dev_info(&dev->dev, "SMBus using %s\n",
priv->features & FEATURE_IRQ ? "PCI interrupt" : "polling");
+ i801_add_tco(priv);
+
/* set up the sysfs linkage to our parent device */
priv->adapter.dev.parent = &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)
projects / firefly-linux-kernel-4.4.55.git / blobdiff