bcma: support bringing up bus hosted on PCIe Gen 2

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

3 files changed, 30 insertions, 3 deletions

diff --git a/drivers/bcma/bcma_private.h b/drivers/bcma/bcma_private.h
index 351f4afdad25..36929126a206 100644
--- a/drivers/bcma/bcma_private.h
+++ b/drivers/bcma/bcma_private.h
@@ -104,6 +104,9 @@ u32 bcma_pcie_read(struct bcma_drv_pci *pc, u32 address);
 void bcma_core_pci_up(struct bcma_drv_pci *pc);
 void bcma_core_pci_down(struct bcma_drv_pci *pc);
 
+/* driver_pcie2.c */
+void bcma_core_pcie2_up(struct bcma_drv_pcie2 *pcie2);
+
 extern int bcma_chipco_watchdog_register(struct bcma_drv_cc *cc);
 
 #ifdef CONFIG_BCMA_DRIVER_PCI_HOSTMODE
diff --git a/drivers/bcma/driver_pcie2.c b/drivers/bcma/driver_pcie2.c
index e4be537b0c66..4568bc7bd54a 100644
--- a/drivers/bcma/driver_pcie2.c
+++ b/drivers/bcma/driver_pcie2.c
@@ -156,14 +156,23 @@ static void pciedev_reg_pm_clk_period(struct bcma_drv_pcie2 *pcie2)
 
 void bcma_core_pcie2_init(struct bcma_drv_pcie2 *pcie2)
 {
-        struct bcma_chipinfo *ci = &pcie2->core->bus->chipinfo;
+        struct bcma_bus *bus = pcie2->core->bus;
+        struct bcma_chipinfo *ci = &bus->chipinfo;
         u32 tmp;
 
         tmp = pcie2_read32(pcie2, BCMA_CORE_PCIE2_SPROM(54));
         if ((tmp & 0xe) >> 1 == 2)
                 bcma_core_pcie2_cfg_write(pcie2, 0x4e0, 0x17);
 
-        /* TODO: Do we need pcie_reqsize? */
+        switch (bus->chipinfo.id) {
+        case BCMA_CHIP_ID_BCM4360:
+        case BCMA_CHIP_ID_BCM4352:
+                pcie2->reqsize = 1024;
+                break;
+        default:
+                pcie2->reqsize = 128;
+                break;
+        }
 
         if (ci->id == BCMA_CHIP_ID_BCM4360 && ci->rev > 3)
                 bcma_core_pcie2_war_delay_perst_enab(pcie2, true);
@@ -173,3 +182,18 @@ void bcma_core_pcie2_init(struct bcma_drv_pcie2 *pcie2)
         pciedev_crwlpciegen2_180(pcie2);
         pciedev_crwlpciegen2_182(pcie2);
 }
+
+/**************************************************
+ * Runtime ops.
+ **************************************************/
+
+void bcma_core_pcie2_up(struct bcma_drv_pcie2 *pcie2)
+{
+        struct bcma_bus *bus = pcie2->core->bus;
+        struct pci_dev *dev = bus->host_pci;
+        int err;
+
+        err = pcie_set_readrq(dev, pcie2->reqsize);
+        if (err)
+                bcma_err(bus, "Error setting PCI_EXP_DEVCTL_READRQ: %d\n", err);
+}
diff --git a/drivers/bcma/host_pci.c b/drivers/bcma/host_pci.c
index 8dd37dc94cae..5fb87a899a24 100644
--- a/drivers/bcma/host_pci.c
+++ b/drivers/bcma/host_pci.c
@@ -322,7 +322,7 @@ void bcma_host_pci_up(struct bcma_bus *bus)
                 return;
 
         if (bus->host_is_pcie2)
-                pr_warn("Bringing up bus with PCIe Gen 2 host is unsupported yet\n");
+                bcma_core_pcie2_up(&bus->drv_pcie2);
         else
                 bcma_core_pci_up(&bus->drv_pci[0]);
 }