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Subject[PATCH v1 1/3] ipc: Added platform data structure
Date
Since the same ipc driver can be used by many platforms, using
macros for defining ipc_base and i2c_base addresses is not
a scalable approach. So added a platform data structure to pass
this information.

Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
---
drivers/platform/x86/intel_scu_ipc.c | 37 ++++++++++++++++++++++++++--------
1 file changed, 29 insertions(+), 8 deletions(-)

diff --git a/drivers/platform/x86/intel_scu_ipc.c b/drivers/platform/x86/intel_scu_ipc.c
index 9215ed7..93c1b57 100644
--- a/drivers/platform/x86/intel_scu_ipc.c
+++ b/drivers/platform/x86/intel_scu_ipc.c
@@ -58,12 +58,29 @@
* message handler is called within firmware.
*/

-#define IPC_BASE_ADDR 0xFF11C000 /* IPC1 base register address */
-#define IPC_MAX_ADDR 0x100 /* Maximum IPC regisers */
#define IPC_WWBUF_SIZE 20 /* IPC Write buffer Size */
#define IPC_RWBUF_SIZE 20 /* IPC Read buffer Size */
-#define IPC_I2C_BASE 0xFF12B000 /* I2C control register base address */
-#define IPC_I2C_MAX_ADDR 0x10 /* Maximum I2C regisers */
+
+enum {
+ SCU_IPC_LINCROFT,
+};
+
+/* intel scu ipc driver data*/
+struct intel_scu_ipc_pdata_t {
+ u32 ipc_base;
+ u32 i2c_base;
+ u32 ipc_len;
+ u32 i2c_len;
+};
+
+static struct intel_scu_ipc_pdata_t intel_scu_ipc_pdata[] = {
+ [SCU_IPC_LINCROFT] = {
+ .ipc_base = 0xff11c000,
+ .i2c_base = 0xff12b000,
+ .ipc_len = 0x100,
+ .i2c_len = 0x10,
+ },
+};

static int ipc_probe(struct pci_dev *dev, const struct pci_device_id *id);
static void ipc_remove(struct pci_dev *pdev);
@@ -504,12 +521,16 @@ static irqreturn_t ioc(int irq, void *dev_id)
*/
static int ipc_probe(struct pci_dev *dev, const struct pci_device_id *id)
{
- int err;
+ int err, pid;
+ struct intel_scu_ipc_pdata_t *pdata;
resource_size_t pci_resource;

if (ipcdev.pdev) /* We support only one SCU */
return -EBUSY;

+ pid = id->driver_data;
+ pdata = &intel_scu_ipc_pdata[pid];
+
ipcdev.pdev = pci_dev_get(dev);

err = pci_enable_device(dev);
@@ -527,11 +548,11 @@ 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(IPC_BASE_ADDR, IPC_MAX_ADDR);
+ ipcdev.ipc_base = ioremap_nocache(pdata->ipc_base, pdata->ipc_len);
if (!ipcdev.ipc_base)
return -ENOMEM;

- ipcdev.i2c_base = ioremap_nocache(IPC_I2C_BASE, IPC_I2C_MAX_ADDR);
+ ipcdev.i2c_base = ioremap_nocache(pdata->i2c_base, pdata->i2c_len);
if (!ipcdev.i2c_base) {
iounmap(ipcdev.ipc_base);
return -ENOMEM;
@@ -564,7 +585,7 @@ static void ipc_remove(struct pci_dev *pdev)
}

static DEFINE_PCI_DEVICE_TABLE(pci_ids) = {
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x082a)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x082a), SCU_IPC_LINCROFT},
{ 0,}
};
MODULE_DEVICE_TABLE(pci, pci_ids);
--
1.7.9.5


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