[OMAPZOOM][PATCH] DSPBRIDGE Wakeup IVA before accessing IVA MMU Registers

[Ramirez Luna, Omar]

From: Ramesh Gupta <grgu...@ti.com>
Date: Wed, 14 Jan 2009 17:39:20 +0530
Subject: [PATCH] DSPBRIDGE Wakeup IVA before accessing IVA MMU Registers

Wakeup IVA before accessing IVA MMU Registers

Signed-off-by: Ramesh Gupta G <grgu...@ti.com>

---
 drivers/dsp/bridge/wmd/tiomap3430.c |   21 +++++++++++++++++++--
 1 files changed, 19 insertions(+), 2 deletions(-)

diff --git a/drivers/dsp/bridge/wmd/tiomap3430.c 
b/drivers/dsp/bridge/wmd/tiomap3430.c
index c05383e..d838169 100644
--- a/drivers/dsp/bridge/wmd/tiomap3430.c
+++ b/drivers/dsp/bridge/wmd/tiomap3430.c
@@ -1289,6 +1290,7 @@ static DSP_STATUS WMD_BRD_MemMap(struct WMD_DEV_CONTEXT 
*hDevContext,
        struct HW_MMUMapAttrs_t hwAttrs;
        u32 numOfActualTabEntries = 0;
        u32 temp = 0;
+       struct CFG_HOSTRES resources;
        u32 *pPhysAddrPageTbl = NULL;
        struct vm_area_struct *vma;
        struct mm_struct *mm = current->mm;
@@ -1296,6 +1298,10 @@ static DSP_STATUS WMD_BRD_MemMap(struct WMD_DEV_CONTEXT 
*hDevContext,
        DBG_Trace(DBG_ENTER, "> WMD_BRD_MemMap hDevContext %x, pa %x, va %x, "
                 "size %x, ulMapAttr %x\n", hDevContext, ulMpuAddr, ulVirtAddr,
                 ulNumBytes, ulMapAttr);
+       status = CFG_GetHostResources(
+                       (struct CFG_DEVNODE *)DRV_GetFirstDevExtension(),
+                                       &resources);
+
        if (ulNumBytes == 0)
                return DSP_EINVALIDARG;
 
@@ -1423,7 +1429,16 @@ func_cont:
         * This is called from here instead from PteUpdate to avoid unnecessary
         * repetition while mapping non-contiguous physical regions of a virtual
         * region */
-       HW_MMU_TLBFlushAll(pDevContext->dwDSPMmuBase);
+       HW_PWRST_IVA2RegGet(resources.dwPrmBase, &temp);
+       if ((temp & HW_PWR_STATE_ON) == HW_PWR_STATE_OFF) {
+               /* IVA domain is not in ON state*/
+               DBG_Trace(DBG_LEVEL7, "temp value is 0x%x\n", temp);
+               CLK_Enable(SERVICESCLK_iva2_ck);
+               WakeDSP(pDevContext, NULL);
+               HW_MMU_TLBFlushAll(pDevContext->dwDSPMmuBase);
+               CLK_Disable(SERVICESCLK_iva2_ck);
+       } else
+               HW_MMU_TLBFlushAll(pDevContext->dwDSPMmuBase);
        DBG_Trace(DBG_ENTER, "< WMD_BRD_MemMap status %x\n", status);
        return status;
 }
@@ -1564,6 +1579,7 @@ static DSP_STATUS WMD_BRD_MemUnMap(struct WMD_DEV_CONTEXT 
*hDevContext,
         /* It is better to flush the TLB here, so that any stale old entries
         * get flushed */
 EXIT_LOOP:
+       IO_InterruptDSP2(pDevContext, MBX_PM_DSPWAKEUP);
        HW_MMU_TLBFlushAll(pDevContext->dwDSPMmuBase);
        DBG_Trace(DBG_LEVEL1, "WMD_BRD_MemUnMap vaCurr %x, pteAddrL1 %x "
                  "pteAddrL2 %x\n", vaCurr, pteAddrL1, pteAddrL2);
@@ -2048,6 +2064,7 @@ func_cont:
         * repetition while mapping non-contiguous physical regions of a virtual
         * region */
        /* Waking up DSP before calling TLB Flush */
+       IO_InterruptDSP2(pDevContext, MBX_PM_DSPWAKEUP);
        HW_MMU_TLBFlushAll(pDevContext->dwDSPMmuBase);
        DBG_Trace(DBG_LEVEL7, "< WMD_BRD_MemMap  at end status %x\n", status);
        return status;
-- 
1.5.3.2

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