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-rw-r--r--sound/soc/intel/common/sst-dsp.c250
1 files changed, 250 insertions, 0 deletions
diff --git a/sound/soc/intel/common/sst-dsp.c b/sound/soc/intel/common/sst-dsp.c
new file mode 100644
index 000000000..229d09d61
--- /dev/null
+++ b/sound/soc/intel/common/sst-dsp.c
@@ -0,0 +1,250 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Intel Smart Sound Technology (SST) DSP Core Driver
+ *
+ * Copyright (C) 2013, Intel Corporation. All rights reserved.
+ */
+
+#include <linux/slab.h>
+#include <linux/export.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/io-64-nonatomic-lo-hi.h>
+#include <linux/delay.h>
+
+#include "sst-dsp.h"
+#include "sst-dsp-priv.h"
+
+#define CREATE_TRACE_POINTS
+#include <trace/events/intel-sst.h>
+
+/* Internal generic low-level SST IO functions - can be overidden */
+void sst_shim32_write(void __iomem *addr, u32 offset, u32 value)
+{
+ writel(value, addr + offset);
+}
+EXPORT_SYMBOL_GPL(sst_shim32_write);
+
+u32 sst_shim32_read(void __iomem *addr, u32 offset)
+{
+ return readl(addr + offset);
+}
+EXPORT_SYMBOL_GPL(sst_shim32_read);
+
+void sst_shim32_write64(void __iomem *addr, u32 offset, u64 value)
+{
+ writeq(value, addr + offset);
+}
+EXPORT_SYMBOL_GPL(sst_shim32_write64);
+
+u64 sst_shim32_read64(void __iomem *addr, u32 offset)
+{
+ return readq(addr + offset);
+}
+EXPORT_SYMBOL_GPL(sst_shim32_read64);
+
+/* Public API */
+void sst_dsp_shim_write(struct sst_dsp *sst, u32 offset, u32 value)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&sst->spinlock, flags);
+ sst->ops->write(sst->addr.shim, offset, value);
+ spin_unlock_irqrestore(&sst->spinlock, flags);
+}
+EXPORT_SYMBOL_GPL(sst_dsp_shim_write);
+
+u32 sst_dsp_shim_read(struct sst_dsp *sst, u32 offset)
+{
+ unsigned long flags;
+ u32 val;
+
+ spin_lock_irqsave(&sst->spinlock, flags);
+ val = sst->ops->read(sst->addr.shim, offset);
+ spin_unlock_irqrestore(&sst->spinlock, flags);
+
+ return val;
+}
+EXPORT_SYMBOL_GPL(sst_dsp_shim_read);
+
+void sst_dsp_shim_write_unlocked(struct sst_dsp *sst, u32 offset, u32 value)
+{
+ sst->ops->write(sst->addr.shim, offset, value);
+}
+EXPORT_SYMBOL_GPL(sst_dsp_shim_write_unlocked);
+
+u32 sst_dsp_shim_read_unlocked(struct sst_dsp *sst, u32 offset)
+{
+ return sst->ops->read(sst->addr.shim, offset);
+}
+EXPORT_SYMBOL_GPL(sst_dsp_shim_read_unlocked);
+
+int sst_dsp_shim_update_bits_unlocked(struct sst_dsp *sst, u32 offset,
+ u32 mask, u32 value)
+{
+ bool change;
+ unsigned int old, new;
+ u32 ret;
+
+ ret = sst_dsp_shim_read_unlocked(sst, offset);
+
+ old = ret;
+ new = (old & (~mask)) | (value & mask);
+
+ change = (old != new);
+ if (change)
+ sst_dsp_shim_write_unlocked(sst, offset, new);
+
+ return change;
+}
+EXPORT_SYMBOL_GPL(sst_dsp_shim_update_bits_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)
+{
+ unsigned long flags;
+ bool change;
+
+ spin_lock_irqsave(&sst->spinlock, flags);
+ change = sst_dsp_shim_update_bits_unlocked(sst, offset, mask, value);
+ spin_unlock_irqrestore(&sst->spinlock, flags);
+ return change;
+}
+EXPORT_SYMBOL_GPL(sst_dsp_shim_update_bits);
+
+/* 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 time, char *operation)
+{
+ u32 reg;
+ unsigned long timeout;
+ int k = 0, s = 500;
+
+ /*
+ * split the loop into sleeps of varying resolution. more accurately,
+ * the range of wakeups are:
+ * Phase 1(first 5ms): min sleep 0.5ms; max sleep 1ms.
+ * Phase 2:( 5ms to 10ms) : min sleep 0.5ms; max sleep 10ms
+ * (usleep_range (500, 1000) and usleep_range(5000, 10000) are
+ * both possible in this phase depending on whether k > 10 or not).
+ * Phase 3: (beyond 10 ms) min sleep 5ms; max sleep 10ms.
+ */
+
+ timeout = jiffies + msecs_to_jiffies(time);
+ while ((((reg = sst_dsp_shim_read_unlocked(ctx, offset)) & mask) != target)
+ && time_before(jiffies, timeout)) {
+ k++;
+ if (k > 10)
+ s = 5000;
+
+ usleep_range(s, 2*s);
+ }
+
+ if ((reg & mask) == target) {
+ dev_dbg(ctx->dev, "FW Poll Status: reg=%#x %s successful\n",
+ reg, operation);
+
+ return 0;
+ }
+
+ dev_dbg(ctx->dev, "FW Poll Status: reg=%#x %s timedout\n",
+ reg, operation);
+ return -ETIME;
+}
+EXPORT_SYMBOL_GPL(sst_dsp_register_poll);
+
+int sst_dsp_mailbox_init(struct sst_dsp *sst, u32 inbox_offset, size_t inbox_size,
+ u32 outbox_offset, size_t outbox_size)
+{
+ sst->mailbox.in_base = sst->addr.lpe + inbox_offset;
+ sst->mailbox.out_base = sst->addr.lpe + outbox_offset;
+ sst->mailbox.in_size = inbox_size;
+ sst->mailbox.out_size = outbox_size;
+ return 0;
+}
+EXPORT_SYMBOL_GPL(sst_dsp_mailbox_init);
+
+void sst_dsp_outbox_write(struct sst_dsp *sst, void *message, size_t bytes)
+{
+ u32 i;
+
+ trace_sst_ipc_outbox_write(bytes);
+
+ memcpy_toio(sst->mailbox.out_base, message, bytes);
+
+ for (i = 0; i < bytes; i += 4)
+ trace_sst_ipc_outbox_wdata(i, *(u32 *)(message + i));
+}
+EXPORT_SYMBOL_GPL(sst_dsp_outbox_write);
+
+void sst_dsp_outbox_read(struct sst_dsp *sst, void *message, size_t bytes)
+{
+ u32 i;
+
+ trace_sst_ipc_outbox_read(bytes);
+
+ memcpy_fromio(message, sst->mailbox.out_base, bytes);
+
+ for (i = 0; i < bytes; i += 4)
+ trace_sst_ipc_outbox_rdata(i, *(u32 *)(message + i));
+}
+EXPORT_SYMBOL_GPL(sst_dsp_outbox_read);
+
+void sst_dsp_inbox_write(struct sst_dsp *sst, void *message, size_t bytes)
+{
+ u32 i;
+
+ trace_sst_ipc_inbox_write(bytes);
+
+ memcpy_toio(sst->mailbox.in_base, message, bytes);
+
+ for (i = 0; i < bytes; i += 4)
+ trace_sst_ipc_inbox_wdata(i, *(u32 *)(message + i));
+}
+EXPORT_SYMBOL_GPL(sst_dsp_inbox_write);
+
+void sst_dsp_inbox_read(struct sst_dsp *sst, void *message, size_t bytes)
+{
+ u32 i;
+
+ trace_sst_ipc_inbox_read(bytes);
+
+ memcpy_fromio(message, sst->mailbox.in_base, bytes);
+
+ for (i = 0; i < bytes; i += 4)
+ trace_sst_ipc_inbox_rdata(i, *(u32 *)(message + i));
+}
+EXPORT_SYMBOL_GPL(sst_dsp_inbox_read);
+
+/* Module information */
+MODULE_AUTHOR("Liam Girdwood");
+MODULE_DESCRIPTION("Intel SST Core");
+MODULE_LICENSE("GPL v2");