diff options
Diffstat (limited to 'drivers/platform/x86/intel_pmc_ipc.c')
| -rw-r--r-- | drivers/platform/x86/intel_pmc_ipc.c | 67 |
1 files changed, 59 insertions, 8 deletions
diff --git a/drivers/platform/x86/intel_pmc_ipc.c b/drivers/platform/x86/intel_pmc_ipc.c index 0bf51d574fa9..0651d47b8eeb 100644 --- a/drivers/platform/x86/intel_pmc_ipc.c +++ b/drivers/platform/x86/intel_pmc_ipc.c @@ -32,7 +32,10 @@ #include <linux/notifier.h> #include <linux/suspend.h> #include <linux/acpi.h> +#include <linux/io-64-nonatomic-lo-hi.h> + #include <asm/intel_pmc_ipc.h> + #include <linux/platform_data/itco_wdt.h> /* @@ -54,6 +57,18 @@ #define IPC_WRITE_BUFFER 0x80 #define IPC_READ_BUFFER 0x90 +/* PMC Global Control Registers */ +#define GCR_TELEM_DEEP_S0IX_OFFSET 0x1078 +#define GCR_TELEM_SHLW_S0IX_OFFSET 0x1080 + +/* Residency with clock rate at 19.2MHz to usecs */ +#define S0IX_RESIDENCY_IN_USECS(d, s) \ +({ \ + u64 result = 10ull * ((d) + (s)); \ + do_div(result, 192); \ + result; \ +}) + /* * 16-byte buffer for sending data associated with IPC command. */ @@ -68,7 +83,7 @@ #define PLAT_RESOURCE_IPC_INDEX 0 #define PLAT_RESOURCE_IPC_SIZE 0x1000 #define PLAT_RESOURCE_GCR_OFFSET 0x1008 -#define PLAT_RESOURCE_GCR_SIZE 0x4 +#define PLAT_RESOURCE_GCR_SIZE 0x1000 #define PLAT_RESOURCE_BIOS_DATA_INDEX 1 #define PLAT_RESOURCE_BIOS_IFACE_INDEX 2 #define PLAT_RESOURCE_TELEM_SSRAM_INDEX 3 @@ -97,8 +112,6 @@ #define TCO_PMC_OFFSET 0x8 #define TCO_PMC_SIZE 0x4 -static const int iTCO_version = 3; - static struct intel_pmc_ipc_dev { struct device *dev; void __iomem *ipc_base; @@ -115,6 +128,7 @@ static struct intel_pmc_ipc_dev { /* gcr */ resource_size_t gcr_base; int gcr_size; + bool has_gcr_regs; /* punit */ struct platform_device *punit_dev; @@ -180,6 +194,11 @@ static inline u32 ipc_data_readl(u32 offset) return readl(ipcdev.ipc_base + IPC_READ_BUFFER + offset); } +static inline u64 gcr_data_readq(u32 offset) +{ + return readq(ipcdev.ipc_base + offset); +} + static int intel_pmc_ipc_check_status(void) { int status; @@ -389,6 +408,7 @@ static void ipc_pci_remove(struct pci_dev *pdev) static const struct pci_device_id ipc_pci_ids[] = { {PCI_VDEVICE(INTEL, 0x0a94), 0}, {PCI_VDEVICE(INTEL, 0x1a94), 0}, + {PCI_VDEVICE(INTEL, 0x5a94), 0}, { 0,} }; MODULE_DEVICE_TABLE(pci, ipc_pci_ids); @@ -712,7 +732,8 @@ static int ipc_plat_get_res(struct platform_device *pdev) dev_err(&pdev->dev, "Failed to get ipc resource\n"); return -ENXIO; } - size = PLAT_RESOURCE_IPC_SIZE; + size = PLAT_RESOURCE_IPC_SIZE + PLAT_RESOURCE_GCR_SIZE; + if (!request_mem_region(res->start, size, pdev->name)) { dev_err(&pdev->dev, "Failed to request ipc resource\n"); return -EBUSY; @@ -748,6 +769,28 @@ static int ipc_plat_get_res(struct platform_device *pdev) return 0; } +/** + * intel_pmc_s0ix_counter_read() - Read S0ix residency. + * @data: Out param that contains current S0ix residency count. + * + * Return: an error code or 0 on success. + */ +int intel_pmc_s0ix_counter_read(u64 *data) +{ + u64 deep, shlw; + + if (!ipcdev.has_gcr_regs) + return -EACCES; + + deep = gcr_data_readq(GCR_TELEM_DEEP_S0IX_OFFSET); + shlw = gcr_data_readq(GCR_TELEM_SHLW_S0IX_OFFSET); + + *data = S0IX_RESIDENCY_IN_USECS(deep, shlw); + + return 0; +} +EXPORT_SYMBOL_GPL(intel_pmc_s0ix_counter_read); + #ifdef CONFIG_ACPI static const struct acpi_device_id ipc_acpi_ids[] = { { "INT34D2", 0}, @@ -797,6 +840,8 @@ static int ipc_plat_probe(struct platform_device *pdev) goto err_sys; } + ipcdev.has_gcr_regs = true; + return 0; err_sys: free_irq(ipcdev.irq, &ipcdev); @@ -808,8 +853,11 @@ err_device: iounmap(ipcdev.ipc_base); res = platform_get_resource(pdev, IORESOURCE_MEM, PLAT_RESOURCE_IPC_INDEX); - if (res) - release_mem_region(res->start, PLAT_RESOURCE_IPC_SIZE); + if (res) { + release_mem_region(res->start, + PLAT_RESOURCE_IPC_SIZE + + PLAT_RESOURCE_GCR_SIZE); + } return ret; } @@ -825,8 +873,11 @@ static int ipc_plat_remove(struct platform_device *pdev) iounmap(ipcdev.ipc_base); res = platform_get_resource(pdev, IORESOURCE_MEM, PLAT_RESOURCE_IPC_INDEX); - if (res) - release_mem_region(res->start, PLAT_RESOURCE_IPC_SIZE); + if (res) { + release_mem_region(res->start, + PLAT_RESOURCE_IPC_SIZE + + PLAT_RESOURCE_GCR_SIZE); + } ipcdev.dev = NULL; return 0; } |
