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Message-Id: <1452157616-10702-1-git-send-email-souvik.k.chakravarty@intel.com>
Date: Thu, 7 Jan 2016 14:36:56 +0530
From: Souvik Kumar Chakravarty <souvik.k.chakravarty@...el.com>
To: platform-driver-x86@...r.kernel.org
Cc: dvhart@...radead.org, rjw@...ysocki.net,
linux-kernel@...r.kernel.org, srinidhi.kasagar@...el.com,
qipeng.zha@...el.com, rajeev.d.muralidhar@...el.com,
sukumar.ghorai@...el.com, ong.hock.yu@...el.com,
aubrey.li@...el.com, david.ginat@...el.com,
Souvik Kumar Chakravarty <souvik.k.chakravarty@...el.com>
Subject: [PATCH v4 3/5] platform:x86: Add Intel telemetry platform device
Telemetry Device is created by the pmc_ipc driver. Resources
are populated according SSRAM region as indicated by the BIOS tables.
Signed-off-by: Souvik Kumar Chakravarty <souvik.k.chakravarty@...el.com>
---
drivers/platform/x86/intel_pmc_ipc.c | 96 ++++++++++++++++++++++++++++++++++
1 file changed, 96 insertions(+)
diff --git a/drivers/platform/x86/intel_pmc_ipc.c b/drivers/platform/x86/intel_pmc_ipc.c
index ca69135..092519e 100644
--- a/drivers/platform/x86/intel_pmc_ipc.c
+++ b/drivers/platform/x86/intel_pmc_ipc.c
@@ -70,6 +70,7 @@
#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
#define PLAT_RESOURCE_ISP_DATA_INDEX 4
#define PLAT_RESOURCE_ISP_IFACE_INDEX 5
#define PLAT_RESOURCE_GTD_DATA_INDEX 6
@@ -88,6 +89,10 @@
#define TCO_BASE_OFFSET 0x60
#define TCO_REGS_SIZE 16
#define PUNIT_DEVICE_NAME "intel_punit_ipc"
+#define TELEMETRY_DEVICE_NAME "intel_telemetry"
+#define TELEM_SSRAM_SIZE 240
+#define TELEM_PMC_SSRAM_OFFSET 0x1B00
+#define TELEM_PUNIT_SSRAM_OFFSET 0x1A00
static const int iTCO_version = 3;
@@ -110,6 +115,14 @@ static struct intel_pmc_ipc_dev {
/* punit */
struct platform_device *punit_dev;
+
+ /* Telemetry */
+ resource_size_t telem_pmc_ssram_base;
+ resource_size_t telem_punit_ssram_base;
+ int telem_pmc_ssram_size;
+ int telem_punit_ssram_size;
+ u8 telem_res_inval;
+ struct platform_device *telemetry_dev;
} ipcdev;
static char *ipc_err_sources[] = {
@@ -491,6 +504,18 @@ static struct itco_wdt_platform_data tco_info = {
.version = 3,
};
+#define TELEMETRY_RESOURCE_PUNIT_SSRAM 0
+#define TELEMETRY_RESOURCE_PMC_SSRAM 1
+static struct resource telemetry_res[] = {
+ /*Telemetry*/
+ {
+ .flags = IORESOURCE_MEM,
+ },
+ {
+ .flags = IORESOURCE_MEM,
+ },
+};
+
static int ipc_create_punit_device(void)
{
struct platform_device *pdev;
@@ -574,6 +599,51 @@ err:
return ret;
}
+static int ipc_create_telemetry_device(void)
+{
+ struct platform_device *pdev;
+ struct resource *res;
+ int ret;
+
+ pdev = platform_device_alloc(TELEMETRY_DEVICE_NAME, -1);
+ if (!pdev) {
+ dev_err(ipcdev.dev,
+ "Failed to allocate telemetry platform device\n");
+ return -ENOMEM;
+ }
+
+ pdev->dev.parent = ipcdev.dev;
+
+ res = telemetry_res + TELEMETRY_RESOURCE_PUNIT_SSRAM;
+ res->start = ipcdev.telem_punit_ssram_base;
+ res->end = res->start + ipcdev.telem_punit_ssram_size - 1;
+
+ res = telemetry_res + TELEMETRY_RESOURCE_PMC_SSRAM;
+ res->start = ipcdev.telem_pmc_ssram_base;
+ res->end = res->start + ipcdev.telem_pmc_ssram_size - 1;
+
+ ret = platform_device_add_resources(pdev, telemetry_res,
+ ARRAY_SIZE(telemetry_res));
+ if (ret) {
+ dev_err(ipcdev.dev,
+ "Failed to add telemetry platform resources\n");
+ goto err;
+ }
+
+ ret = platform_device_add(pdev);
+ if (ret) {
+ dev_err(ipcdev.dev,
+ "Failed to add telemetry platform device\n");
+ goto err;
+ }
+ ipcdev.telemetry_dev = pdev;
+
+ return 0;
+err:
+ platform_device_put(pdev);
+ return ret;
+}
+
static int ipc_create_pmc_devices(void)
{
int ret;
@@ -588,6 +658,14 @@ static int ipc_create_pmc_devices(void)
dev_err(ipcdev.dev, "Failed to add punit platform device\n");
platform_device_unregister(ipcdev.tco_dev);
}
+
+ if (!ipcdev.telem_res_inval) {
+ ret = ipc_create_telemetry_device();
+ if (ret)
+ dev_warn(ipcdev.dev,
+ "Failed to add telemetry platform device\n");
+ }
+
return ret;
}
@@ -692,6 +770,22 @@ static int ipc_plat_get_res(struct platform_device *pdev)
ipcdev.gcr_size = PLAT_RESOURCE_GCR_SIZE;
dev_info(&pdev->dev, "ipc res: %pR\n", res);
+ ipcdev.telem_res_inval = 0;
+ res = platform_get_resource(pdev, IORESOURCE_MEM,
+ PLAT_RESOURCE_TELEM_SSRAM_INDEX);
+ if (!res) {
+ dev_err(&pdev->dev, "Failed to get telemetry ssram resource\n");
+ ipcdev.telem_res_inval = 1;
+ } else {
+ ipcdev.telem_punit_ssram_base = res->start +
+ TELEM_PUNIT_SSRAM_OFFSET;
+ ipcdev.telem_punit_ssram_size = TELEM_SSRAM_SIZE;
+ ipcdev.telem_pmc_ssram_base = res->start +
+ TELEM_PMC_SSRAM_OFFSET;
+ ipcdev.telem_pmc_ssram_size = TELEM_SSRAM_SIZE;
+ dev_info(&pdev->dev, "telemetry ssram res: %pR\n", res);
+ }
+
return 0;
}
@@ -749,6 +843,7 @@ err_sys:
err_irq:
platform_device_unregister(ipcdev.tco_dev);
platform_device_unregister(ipcdev.punit_dev);
+ platform_device_unregister(ipcdev.telemetry_dev);
err_device:
iounmap(ipcdev.ipc_base);
res = platform_get_resource(pdev, IORESOURCE_MEM,
@@ -766,6 +861,7 @@ static int ipc_plat_remove(struct platform_device *pdev)
free_irq(ipcdev.irq, &ipcdev);
platform_device_unregister(ipcdev.tco_dev);
platform_device_unregister(ipcdev.punit_dev);
+ platform_device_unregister(ipcdev.telemetry_dev);
iounmap(ipcdev.ipc_base);
res = platform_get_resource(pdev, IORESOURCE_MEM,
PLAT_RESOURCE_IPC_INDEX);
--
1.7.9.5
--
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