This code is based on code from pcie_misc_config_fixup() in brcmsmac.
This patch is part of the move of pci specific code from brcmsmac to
bcma.
Signed-off-by: Hauke Mehrtens <ha...@hauke-m.de>
---
drivers/bcma/driver_pci.c | 18 ++++++++++++++++++
include/linux/bcma/bcma_driver_pci.h | 4 ++++
2 files changed, 22 insertions(+)
diff --git a/drivers/bcma/driver_pci.c b/drivers/bcma/driver_pci.c
index 472d14f..9a96f14 100644
--- a/drivers/bcma/driver_pci.c
+++ b/drivers/bcma/driver_pci.c
@@ -186,6 +186,23 @@ static void bcma_core_pci_fixcfg(struct bcma_drv_pci *pc)
}
}
+/* Fix MISC config to allow coming out of L2/L3-Ready state w/o PRST */
+/* Needs to happen when coming out of 'standby'/'hibernate' */
+static void bcma_core_pci_config_fixup(struct bcma_drv_pci *pc)
+{
+ u16 val16;
+ uint regoff;
+
+ regoff = BCMA_CORE_PCI_SPROM(BCMA_CORE_PCI_SPROM_MISC_CONFIG);
+
+ val16 = pcicore_read16(pc, regoff);
+
+ if (!(val16 & BCMA_CORE_PCI_SPROM_L23READY_EXIT_NOPERST)) {
+ val16 |= BCMA_CORE_PCI_SPROM_L23READY_EXIT_NOPERST;
+ pcicore_write16(pc, regoff, val16);
+ }
+}
+
/**************************************************
* Init.
**************************************************/
@@ -194,6 +211,7 @@ static void __devinit bcma_core_pci_clientmode_init(struct
bcma_drv_pci *pc)
{
bcma_core_pci_fixcfg(pc);
bcma_pcicore_serdes_workaround(pc);
+ bcma_core_pci_config_fixup(pc);
}
void __devinit bcma_core_pci_init(struct bcma_drv_pci *pc)
diff --git a/include/linux/bcma/bcma_driver_pci.h
b/include/linux/bcma/bcma_driver_pci.h
index 5b0542c..41da581 100644
--- a/include/linux/bcma/bcma_driver_pci.h
+++ b/include/linux/bcma/bcma_driver_pci.h
@@ -90,6 +90,10 @@ struct pci_dev;
#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 */
+#define BCMA_CORE_PCI_SPROM_MISC_CONFIG 5 /* word 5 */
+#define BCMA_CORE_PCI_SPROM_L23READY_EXIT_NOPERST 0x8000 /* bit 15 */
+#define BCMA_CORE_PCI_SPROM_CLKREQ_OFFSET_REV5 20 /* word 20 for
srom rev <= 5 */
+#define BCMA_CORE_PCI_SPROM_CLKREQ_ENB 0x0800 /* bit 11 */
/* SBtoPCIx */
#define BCMA_CORE_PCI_SBTOPCI_MEM 0x00000000
--
1.7.9.5
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