ASoC: Intel: Add helper to update register bits with attr RWC

For SKL IPC, we have some register bits with attribute RWC. So we need to
force update them. Add helper to force update this type of registers bits.

Signed-off-by: Subhransu S. Prusty <subhransu.s.prusty@intel.com>
Signed-off-by: Jeeja KP <jeeja.kp@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/intel/common/sst-dsp.c

@@ -197,6 +197,22 @@ int sst_dsp_shim_update_bits64_unlocked(struct sst_dsp *sst, u32 offset,
 }
 EXPORT_SYMBOL_GPL(sst_dsp_shim_update_bits64_unlocked);
 
+/* This is for registers bits with attribute RWC */
+void sst_dsp_shim_update_bits_forced_unlocked(struct sst_dsp *sst, u32 offset,
+				u32 mask, u32 value)
+{
+	unsigned int old, new;
+	u32 ret;
+
+	ret = sst_dsp_shim_read_unlocked(sst, offset);
+
+	old = ret;
+	new = (old & (~mask)) | (value & mask);
+
+	sst_dsp_shim_write_unlocked(sst, offset, new);
+}
+EXPORT_SYMBOL_GPL(sst_dsp_shim_update_bits_forced_unlocked);
+
 int sst_dsp_shim_update_bits(struct sst_dsp *sst, u32 offset,
 				u32 mask, u32 value)
 {
@@ -223,6 +239,18 @@ int sst_dsp_shim_update_bits64(struct sst_dsp *sst, u32 offset,
 }
 EXPORT_SYMBOL_GPL(sst_dsp_shim_update_bits64);
 
+/* This is for registers bits with attribute RWC */
+void sst_dsp_shim_update_bits_forced(struct sst_dsp *sst, u32 offset,
+				u32 mask, u32 value)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&sst->spinlock, flags);
+	sst_dsp_shim_update_bits_forced_unlocked(sst, offset, mask, value);
+	spin_unlock_irqrestore(&sst->spinlock, flags);
+}
+EXPORT_SYMBOL_GPL(sst_dsp_shim_update_bits_forced);
+
 int sst_dsp_register_poll(struct sst_dsp *ctx, u32 offset, u32 mask,
 			 u32 target, u32 timeout, char *operation)
 {

sound/soc/intel/common/sst-dsp.h

@@ -230,6 +230,8 @@ void sst_dsp_shim_write64(struct sst_dsp *sst, u32 offset, u64 value);
 u64 sst_dsp_shim_read64(struct sst_dsp *sst, u32 offset);
 int sst_dsp_shim_update_bits64(struct sst_dsp *sst, u32 offset,
 				u64 mask, u64 value);
+void sst_dsp_shim_update_bits_forced(struct sst_dsp *sst, u32 offset,
+				u32 mask, u32 value);
 
 /* SHIM Read / Write Unlocked for callers already holding sst lock */
 void sst_dsp_shim_write_unlocked(struct sst_dsp *sst, u32 offset, u32 value);
@@ -240,6 +242,8 @@ void sst_dsp_shim_write64_unlocked(struct sst_dsp *sst, u32 offset, u64 value);
 u64 sst_dsp_shim_read64_unlocked(struct sst_dsp *sst, u32 offset);
 int sst_dsp_shim_update_bits64_unlocked(struct sst_dsp *sst, u32 offset,
 					u64 mask, u64 value);
+void sst_dsp_shim_update_bits_forced_unlocked(struct sst_dsp *sst, u32 offset,
+				u32 mask, u32 value);
 
 /* Internal generic low-level SST IO functions - can be overidden */
 void sst_shim32_write(void __iomem *addr, u32 offset, u32 value);