bcma: add bcma_core_pci_fixcfg()

This code is based on code from pcicore_fixcfg() in brcmsmac. This
patch is part of the move of pci specific code from brcmsmac to bcma.
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Tested-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/bcma/driver_pci.c

@@ -168,12 +168,31 @@ static void bcma_pcicore_serdes_workaround(struct bcma_drv_pci *pc)
 		                     tmp & ~BCMA_CORE_PCI_PLL_CTRL_FREQDET_EN);
 }
 
+static void bcma_core_pci_fixcfg(struct bcma_drv_pci *pc)
+{
+	struct bcma_device *core = pc->core;
+	u16 val16, core_index;
+	uint regoff;
+
+	regoff = BCMA_CORE_PCI_SPROM(BCMA_CORE_PCI_SPROM_PI_OFFSET);
+	core_index = (u16)core->core_index;
+
+	val16 = pcicore_read16(pc, regoff);
+	if (((val16 & BCMA_CORE_PCI_SPROM_PI_MASK) >> BCMA_CORE_PCI_SPROM_PI_SHIFT)
+	     != core_index) {
+		val16 = (core_index << BCMA_CORE_PCI_SPROM_PI_SHIFT) |
+			(val16 & ~BCMA_CORE_PCI_SPROM_PI_MASK);
+		pcicore_write16(pc, regoff, val16);
+	}
+}
+
 /**************************************************
  * Init.
  **************************************************/
 
 static void __devinit bcma_core_pci_clientmode_init(struct bcma_drv_pci *pc)
 {
+	bcma_core_pci_fixcfg(pc);
 	bcma_pcicore_serdes_workaround(pc);
 }
 

include/linux/bcma/bcma_driver_pci.h

@@ -87,6 +87,9 @@ struct pci_dev;
 #define BCMA_CORE_PCI_PCICFG2			0x0600	/* PCI config space 2 (rev >= 8) */
 #define BCMA_CORE_PCI_PCICFG3			0x0700	/* PCI config space 3 (rev >= 8) */
 #define BCMA_CORE_PCI_SPROM(wordoffset)		(0x0800 + ((wordoffset) * 2)) /* SPROM shadow area (72 bytes) */
+#define  BCMA_CORE_PCI_SPROM_PI_OFFSET		0	/* first word */
+#define   BCMA_CORE_PCI_SPROM_PI_MASK		0xf000	/* bit 15:12 */
+#define   BCMA_CORE_PCI_SPROM_PI_SHIFT		12	/* bit 15:12 */
 
 /* SBtoPCIx */
 #define BCMA_CORE_PCI_SBTOPCI_MEM		0x00000000
@@ -202,7 +205,9 @@ struct bcma_drv_pci {
 };
 
 /* Register access */
+#define pcicore_read16(pc, offset)		bcma_read16((pc)->core, offset)
 #define pcicore_read32(pc, offset)		bcma_read32((pc)->core, offset)
+#define pcicore_write16(pc, offset, val)	bcma_write16((pc)->core, offset, val)
 #define pcicore_write32(pc, offset, val)	bcma_write32((pc)->core, offset, val)
 
 extern void __devinit bcma_core_pci_init(struct bcma_drv_pci *pc);