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authorAndy Shevchenko <andriy.shevchenko@linux.intel.com>2015-01-21 21:38:11 +0200
committerDarren Hart <dvhart@linux.intel.com>2015-01-28 21:21:11 -0800
commit32d0e4a33773ad68c582999a5b945cc47bb02809 (patch)
tree64cb04413891a528523e1efe268ebb71f3124769 /drivers/platform
parentf0295a36dc31774019be278468e22c254f9626e4 (diff)
downloadop-kernel-dev-32d0e4a33773ad68c582999a5b945cc47bb02809.zip
op-kernel-dev-32d0e4a33773ad68c582999a5b945cc47bb02809.tar.gz
intel_scu_ipc: Read resources from PCI configuration
Read the resources from PCI BAR0 instead of using hardcoded values. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Darren Hart <dvhart@linux.intel.com>
Diffstat (limited to 'drivers/platform')
-rw-r--r--drivers/platform/x86/intel_scu_ipc.c21
1 files changed, 6 insertions, 15 deletions
diff --git a/drivers/platform/x86/intel_scu_ipc.c b/drivers/platform/x86/intel_scu_ipc.c
index e6430a3..001b199 100644
--- a/drivers/platform/x86/intel_scu_ipc.c
+++ b/drivers/platform/x86/intel_scu_ipc.c
@@ -43,10 +43,9 @@
/*
* IPC register summary
*
- * IPC register blocks are memory mapped at fixed address of 0xFF11C000
+ * IPC register blocks are memory mapped at fixed address of PCI BAR 0.
* To read or write information to the SCU, driver writes to IPC-1 memory
- * mapped registers (base address 0xFF11C000). The following is the IPC
- * mechanism
+ * mapped registers. The following is the IPC mechanism
*
* 1. IA core cDMI interface claims this transaction and converts it to a
* Transaction Layer Packet (TLP) message which is sent across the cDMI.
@@ -69,34 +68,26 @@
/* intel scu ipc driver data */
struct intel_scu_ipc_pdata_t {
- u32 ipc_base;
u32 i2c_base;
- u32 ipc_len;
u32 i2c_len;
u8 irq_mode;
};
static struct intel_scu_ipc_pdata_t intel_scu_ipc_lincroft_pdata = {
- .ipc_base = 0xff11c000,
.i2c_base = 0xff12b000,
- .ipc_len = 0x100,
.i2c_len = 0x10,
.irq_mode = 0,
};
/* Penwell and Cloverview */
static struct intel_scu_ipc_pdata_t intel_scu_ipc_penwell_pdata = {
- .ipc_base = 0xff11c000,
.i2c_base = 0xff12b000,
- .ipc_len = 0x100,
.i2c_len = 0x10,
.irq_mode = 1,
};
static struct intel_scu_ipc_pdata_t intel_scu_ipc_tangier_pdata = {
- .ipc_base = 0xff009000,
.i2c_base = 0xff00d000,
- .ipc_len = 0x100,
.i2c_len = 0x10,
.irq_mode = 0,
};
@@ -572,7 +563,7 @@ static int ipc_probe(struct pci_dev *dev, const struct pci_device_id *id)
{
int err;
struct intel_scu_ipc_pdata_t *pdata;
- resource_size_t pci_resource;
+ resource_size_t base;
if (ipcdev.pdev) /* We support only one SCU */
return -EBUSY;
@@ -590,8 +581,8 @@ static int ipc_probe(struct pci_dev *dev, const struct pci_device_id *id)
if (err)
return err;
- pci_resource = pci_resource_start(dev, 0);
- if (!pci_resource)
+ base = pci_resource_start(dev, 0);
+ if (!base)
return -ENOMEM;
init_completion(&ipcdev.cmd_complete);
@@ -599,7 +590,7 @@ static int ipc_probe(struct pci_dev *dev, const struct pci_device_id *id)
if (request_irq(dev->irq, ioc, 0, "intel_scu_ipc", &ipcdev))
return -EBUSY;
- ipcdev.ipc_base = ioremap_nocache(pdata->ipc_base, pdata->ipc_len);
+ ipcdev.ipc_base = ioremap_nocache(base, pci_resource_len(dev, 0));
if (!ipcdev.ipc_base)
return -ENOMEM;
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