[alsa-devel] [PATCH 3/7] ASoC: Intel: Skylake: add code loader DMA operations
Vinod Koul
vinod.koul at intel.com
Fri Jul 10 18:48:41 CEST 2015
This patch starts adding code loader DMA handling internal operations for
setting up bdle, controller, spb, cleanup routines and buffer filling
Signed-off-by: Subhransu S. Prusty <subhransu.s.prusty at intel.com>
Signed-off-by: Jeeja KP <jeeja.kp at intel.com>
Signed-off-by: Vinod Koul <vinod.koul at intel.com>
---
sound/soc/intel/skylake/skl-sst-cldma.c | 194 ++++++++++++++++++++++++++++++++
sound/soc/intel/skylake/skl-sst-cldma.h | 60 ++++++++++
2 files changed, 254 insertions(+)
create mode 100644 sound/soc/intel/skylake/skl-sst-cldma.c
diff --git a/sound/soc/intel/skylake/skl-sst-cldma.c b/sound/soc/intel/skylake/skl-sst-cldma.c
new file mode 100644
index 000000000000..44019eef6114
--- /dev/null
+++ b/sound/soc/intel/skylake/skl-sst-cldma.c
@@ -0,0 +1,194 @@
+/*
+ * skl-sst-cldma.c - Code Loader DMA handler
+ *
+ * Copyright (C) 2015, Intel Corporation.
+ * Author: Subhransu S. Prusty <subhransu.s.prusty at intel.com>
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as version 2, as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ */
+
+#include <linux/device.h>
+#include <linux/mm.h>
+#include <linux/kthread.h>
+#include "../common/sst-dsp.h"
+#include "../common/sst-dsp-priv.h"
+
+static void skl_cldma_int_enable(struct sst_dsp *ctx)
+{
+ sst_dsp_shim_update_bits_unlocked(ctx, SKL_ADSP_REG_ADSPIC,
+ SKL_ADSPIC_CL_DMA, SKL_ADSPIC_CL_DMA);
+}
+
+void skl_cldma_int_disable(struct sst_dsp *ctx)
+{
+ sst_dsp_shim_update_bits_unlocked(ctx,
+ SKL_ADSP_REG_ADSPIC, SKL_ADSPIC_CL_DMA, 0);
+}
+
+/* Code loader helper APIs */
+static void skl_cldma_setup_bdle(struct sst_dsp *ctx,
+ struct snd_dma_buffer *dmab_data,
+ u32 **bdlp, int size, int with_ioc)
+{
+ u32 *bdl = *bdlp;
+
+ ctx->cl_dev.frags = 0;
+ while (size > 0) {
+ phys_addr_t addr = virt_to_phys(dmab_data->area +
+ (ctx->cl_dev.frags * ctx->cl_dev.bufsize));
+
+ bdl[0] = cpu_to_le32(lower_32_bits(addr));
+ bdl[1] = cpu_to_le32(upper_32_bits(addr));
+
+ bdl[2] = cpu_to_le32(ctx->cl_dev.bufsize);
+
+ size -= ctx->cl_dev.bufsize;
+ bdl[3] = (size || !with_ioc) ? 0 : cpu_to_le32(0x01);
+
+ bdl += 4;
+ ctx->cl_dev.frags++;
+ }
+}
+
+/*
+ * Setup controller
+ * Configure the registers to update the dma buffer address and
+ * enable interrupts.
+ * Note: Using the channel 1 for transfer
+ */
+static void skl_cldma_setup_controller(struct sst_dsp *ctx,
+ struct snd_dma_buffer *dmab_bdl, unsigned int max_size,
+ u32 count)
+{
+ sst_dsp_shim_write(ctx, SKL_ADSP_REG_CL_SD_BDLPL,
+ CL_SD_BDLPLBA(dmab_bdl->addr));
+ sst_dsp_shim_write(ctx, SKL_ADSP_REG_CL_SD_BDLPU,
+ CL_SD_BDLPUBA(dmab_bdl->addr));
+
+ sst_dsp_shim_write(ctx, SKL_ADSP_REG_CL_SD_CBL, max_size);
+ sst_dsp_shim_write(ctx, SKL_ADSP_REG_CL_SD_LVI, count - 1);
+ sst_dsp_shim_update_bits(ctx, SKL_ADSP_REG_CL_SD_CTL,
+ CL_SD_CTL_IOCE_MASK, CL_SD_CTL_IOCE(1));
+ sst_dsp_shim_update_bits(ctx, SKL_ADSP_REG_CL_SD_CTL,
+ CL_SD_CTL_FEIE_MASK, CL_SD_CTL_FEIE(1));
+ sst_dsp_shim_update_bits(ctx, SKL_ADSP_REG_CL_SD_CTL,
+ CL_SD_CTL_DEIE_MASK, CL_SD_CTL_DEIE(1));
+ sst_dsp_shim_update_bits(ctx, SKL_ADSP_REG_CL_SD_CTL,
+ CL_SD_CTL_STRM_MASK, CL_SD_CTL_STRM(FW_CL_STREAM_NUMBER));
+}
+
+static void skl_cldma_setup_spb(struct sst_dsp *ctx,
+ unsigned int size, bool enable)
+{
+ if (enable)
+ sst_dsp_shim_update_bits_unlocked(ctx,
+ SKL_ADSP_REG_CL_SPBFIFO_SPBFCCTL,
+ CL_SPBFIFO_SPBFCCTL_SPIBE_MASK,
+ CL_SPBFIFO_SPBFCCTL_SPIBE(1));
+
+ sst_dsp_shim_write_unlocked(ctx, SKL_ADSP_REG_CL_SPBFIFO_SPIB, size);
+}
+
+static void skl_cldma_cleanup_spb(struct sst_dsp *ctx)
+{
+ sst_dsp_shim_update_bits_unlocked(ctx,
+ SKL_ADSP_REG_CL_SPBFIFO_SPBFCCTL,
+ CL_SPBFIFO_SPBFCCTL_SPIBE_MASK,
+ CL_SPBFIFO_SPBFCCTL_SPIBE(0));
+
+ sst_dsp_shim_write_unlocked(ctx, SKL_ADSP_REG_CL_SPBFIFO_SPIB, 0);
+}
+
+static void skl_cldma_trigger(struct sst_dsp *ctx, bool enable)
+{
+ if (enable)
+ sst_dsp_shim_update_bits_unlocked(ctx,
+ SKL_ADSP_REG_CL_SD_CTL,
+ CL_SD_CTL_RUN_MASK, CL_SD_CTL_RUN(1));
+ else
+ sst_dsp_shim_update_bits_unlocked(ctx,
+ SKL_ADSP_REG_CL_SD_CTL,
+ CL_SD_CTL_RUN_MASK, CL_SD_CTL_RUN(0));
+}
+
+static void skl_cldma_cleanup(struct sst_dsp *ctx)
+{
+ skl_cldma_cleanup_spb(ctx);
+
+ sst_dsp_shim_update_bits(ctx, SKL_ADSP_REG_CL_SD_CTL,
+ CL_SD_CTL_IOCE_MASK, CL_SD_CTL_IOCE(0));
+ sst_dsp_shim_update_bits(ctx, SKL_ADSP_REG_CL_SD_CTL,
+ CL_SD_CTL_FEIE_MASK, CL_SD_CTL_FEIE(0));
+ sst_dsp_shim_update_bits(ctx, SKL_ADSP_REG_CL_SD_CTL,
+ CL_SD_CTL_DEIE_MASK, CL_SD_CTL_DEIE(0));
+ sst_dsp_shim_update_bits(ctx, SKL_ADSP_REG_CL_SD_CTL,
+ CL_SD_CTL_STRM_MASK, CL_SD_CTL_STRM(0));
+
+ sst_dsp_shim_write(ctx, SKL_ADSP_REG_CL_SD_BDLPL, CL_SD_BDLPLBA(0));
+ sst_dsp_shim_write(ctx, SKL_ADSP_REG_CL_SD_BDLPU, 0);
+
+ sst_dsp_shim_write(ctx, SKL_ADSP_REG_CL_SD_CBL, 0);
+ sst_dsp_shim_write(ctx, SKL_ADSP_REG_CL_SD_LVI, 0);
+}
+
+static int skl_cldma_wait_interruptible(struct sst_dsp *ctx)
+{
+ int ret = 0;
+
+ if (!wait_event_timeout(ctx->cl_dev.wait_queue,
+ ctx->cl_dev.wait_condition,
+ msecs_to_jiffies(SKL_WAIT_TIMEOUT))) {
+ dev_err(ctx->dev, "%s: Wait timeout\n", __func__);
+ ret = -EIO;
+ goto cleanup;
+ }
+
+ dev_dbg(ctx->dev, "%s: Event wake\n", __func__);
+ if (ctx->cl_dev.wake_status != SKL_CL_DMA_BUF_COMPLETE) {
+ dev_err(ctx->dev, "%s: DMA Error\n", __func__);
+ ret = -EIO;
+ }
+
+cleanup:
+ ctx->cl_dev.wake_status = SKL_CL_DMA_STATUS_NONE;
+ return ret;
+}
+
+static void skl_cldma_stop(struct sst_dsp *ctx)
+{
+ ctx->cl_dev.ops.cl_trigger(ctx, false);
+}
+
+static void skl_cldma_fill_buffer(struct sst_dsp *ctx, unsigned int size,
+ const void *curr_pos, bool intr_enable, bool trigger)
+{
+ dev_dbg(ctx->dev, "Size: %x, intr_enable: %d\n", size, intr_enable);
+ dev_dbg(ctx->dev, "buf_pos_index:%d, trigger:%d\n",
+ ctx->cl_dev.dma_buffer_offset, trigger);
+ dev_dbg(ctx->dev, "spib position: %d\n", ctx->cl_dev.curr_spib_pos);
+
+ memcpy(ctx->cl_dev.dmab_data.area + ctx->cl_dev.dma_buffer_offset,
+ curr_pos, size);
+
+ if (ctx->cl_dev.curr_spib_pos == ctx->cl_dev.bufsize)
+ ctx->cl_dev.dma_buffer_offset = 0;
+ else
+ ctx->cl_dev.dma_buffer_offset = ctx->cl_dev.curr_spib_pos;
+
+ ctx->cl_dev.wait_condition = false;
+
+ if (intr_enable)
+ skl_cldma_int_enable(ctx);
+
+ ctx->cl_dev.ops.cl_setup_spb(ctx, ctx->cl_dev.curr_spib_pos, trigger);
+ if (trigger)
+ ctx->cl_dev.ops.cl_trigger(ctx, true);
+}
diff --git a/sound/soc/intel/skylake/skl-sst-cldma.h b/sound/soc/intel/skylake/skl-sst-cldma.h
index 34c366f050ee..99e4c86b6358 100644
--- a/sound/soc/intel/skylake/skl-sst-cldma.h
+++ b/sound/soc/intel/skylake/skl-sst-cldma.h
@@ -188,4 +188,64 @@
#define CL_SPBFIFO_SPBFCCTL_SPIBE(x) \
((x << CL_SPBFIFO_SPBFCCTL_SPIBE_SHIFT) & CL_SPBFIFO_SPBFCCTL_SPIBE_MASK)
+/* SST IPC SKL defines */
+#define SKL_WAIT_TIMEOUT 500 /* 500 msec */
+#define SKL_MAX_BUFFER_SIZE (32 * PAGE_SIZE)
+
+enum skl_cl_dma_wake_states {
+ SKL_CL_DMA_STATUS_NONE = 0,
+ SKL_CL_DMA_BUF_COMPLETE,
+ SKL_CL_DMA_ERR, /* TODO: Expand the error states */
+};
+
+struct sst_dsp;
+
+struct skl_cl_dev_ops {
+ void (*cl_setup_bdle)(struct sst_dsp *ctx,
+ struct snd_dma_buffer *dmab_data,
+ u32 **bdlp, int size, int with_ioc);
+ void (*cl_setup_controller)(struct sst_dsp *ctx,
+ struct snd_dma_buffer *dmab_bdl,
+ unsigned int max_size, u32 page_count);
+ void (*cl_setup_spb)(struct sst_dsp *ctx,
+ unsigned int size, bool enable);
+ void (*cl_cleanup_spb)(struct sst_dsp *ctx);
+ void (*cl_trigger)(struct sst_dsp *ctx, bool enable);
+ void (*cl_cleanup_controller)(struct sst_dsp *ctx);
+ int (*cl_copy_to_dmabuf)(struct sst_dsp *ctx,
+ const void *bin, u32 size);
+ void (*cl_stop_dma)(struct sst_dsp *ctx);
+};
+
+/**
+ * skl_cl_dev - holds information for code loader dma transfer
+ *
+ * @dmab_data: buffer pointer
+ * @dmab_bdl: buffer descriptor list
+ * @bufsize: ring buffer size
+ * @frags: Last valid buffer descriptor index in the BDL
+ * @curr_spib_pos: Current position in ring buffer
+ * @dma_buffer_offset: dma buffer offset
+ * @ops: operations supported on CL dma
+ * @wait_queue: wait queue to wake for wake event
+ * @wake_status: DMA wake status
+ * @wait_condition: condition to wait on wait queue
+ * @cl_dma_lock: for synchronized access to cldma
+ */
+struct skl_cl_dev {
+ struct snd_dma_buffer dmab_data;
+ struct snd_dma_buffer dmab_bdl;
+
+ unsigned int bufsize;
+ unsigned int frags;
+
+ unsigned int curr_spib_pos;
+ unsigned int dma_buffer_offset;
+ struct skl_cl_dev_ops ops;
+
+ wait_queue_head_t wait_queue;
+ int wake_status;
+ bool wait_condition;
+};
+
#endif /* SKL_SST_CLDMA_H_ */
--
1.9.1
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