PCI: iproc: Add BCMA type

The iProc PCIe driver is currently using type IPROC_PCIE_PAXB for the
following SoCs: NS, NSP, Cygnus, NS2, and Pegasus.  In fact, the BCMA-based
NS uses a legacy PAXB controller that is slightly different from the PAXB
controller used in the rest of SoCs, e.g., some registers are missing and
it does not require software configuration of outbound/inbound address
mapping.

Add a new type, IPROC_PCIE_PAXB_BCMA, to allow us to properly support the
BCMA-based NS along with other iProc-based SoCs going forward.

Signed-off-by: Ray Jui <ray.jui@broadcom.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Scott Branden <scott.branden@broadcom.com>

drivers/pci/host/pcie-iproc-bcma.c

@@ -54,6 +54,7 @@ static int iproc_pcie_bcma_probe(struct bcma_device *bdev)
 
 	pcie->dev = dev;
 
+	pcie->type = IPROC_PCIE_PAXB_BCMA;
 	pcie->base = bdev->io_addr;
 	if (!pcie->base) {
 		dev_err(dev, "no controller registers\n");

drivers/pci/host/pcie-iproc-msi.c

@@ -563,6 +563,7 @@ int iproc_msi_init(struct iproc_pcie *pcie, struct device_node *node)
 	}
 
 	switch (pcie->type) {
+	case IPROC_PCIE_PAXB_BCMA:
 	case IPROC_PCIE_PAXB:
 		msi->reg_offsets = iproc_msi_reg_paxb;
 		msi->nr_eq_region = 1;

drivers/pci/host/pcie-iproc.c

@@ -100,6 +100,17 @@ enum iproc_pcie_reg {
 	IPROC_PCIE_MAX_NUM_REG,
 };
 
+/* iProc PCIe PAXB BCMA registers */
+static const u16 iproc_pcie_reg_paxb_bcma[] = {
+	[IPROC_PCIE_CLK_CTRL]         = 0x000,
+	[IPROC_PCIE_CFG_IND_ADDR]     = 0x120,
+	[IPROC_PCIE_CFG_IND_DATA]     = 0x124,
+	[IPROC_PCIE_CFG_ADDR]         = 0x1f8,
+	[IPROC_PCIE_CFG_DATA]         = 0x1fc,
+	[IPROC_PCIE_INTX_EN]          = 0x330,
+	[IPROC_PCIE_LINK_STATUS]      = 0xf0c,
+};
+
 /* iProc PCIe PAXB registers */
 static const u16 iproc_pcie_reg_paxb[] = {
 	[IPROC_PCIE_CLK_CTRL]     = 0x000,
@@ -469,6 +480,9 @@ static int iproc_pcie_rev_init(struct iproc_pcie *pcie)
 	const u16 *regs;
 
 	switch (pcie->type) {
+	case IPROC_PCIE_PAXB_BCMA:
+		regs = iproc_pcie_reg_paxb_bcma;
+		break;
 	case IPROC_PCIE_PAXB:
 		regs = iproc_pcie_reg_paxb;
 		break;

drivers/pci/host/pcie-iproc.h

@@ -24,7 +24,8 @@
  * endpoint devices.
  */
 enum iproc_pcie_type {
-	IPROC_PCIE_PAXB = 0,
+	IPROC_PCIE_PAXB_BCMA = 0,
+	IPROC_PCIE_PAXB,
 	IPROC_PCIE_PAXC,
 };