diff --git a/sound/soc/sof/imx/Makefile b/sound/soc/sof/imx/Makefile
new file mode 100644
index 000000000000..c69237971da5
--- /dev/null
+++ b/sound/soc/sof/imx/Makefile
@@ -0,0 +1,7 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)
+
+ccflags-y += -DDEBUG
this should be removed or in a separate patch.
+struct imx8_priv {
+ struct device *dev;
+ struct snd_sof_dev *sdev;
+ struct imx_dsp_ipc *dsp_ipc;
+ struct imx_sc_ipc *sc_ipc;
maybe a comment to explain what 'sc' stands for?
+};
+
+static void imx8_get_windows(struct snd_sof_dev *sdev)
+{
+ struct sof_ipc_window_elem *elem;
+ u32 outbox_offset = 0;
+ u32 stream_offset = 0;
+ u32 inbox_offset = 0;
+ u32 outbox_size = 0;
+ u32 stream_size = 0;
+ u32 inbox_size = 0;
+ int i;
+
+ if (!sdev->info_window) {
+ dev_err(sdev->dev, "error: have no window info\n");
+ return;
+ }
+
+ for (i = 0; i < sdev->info_window->num_windows; i++) {
+ elem = &sdev->info_window->window[i];
+
+ switch (elem->type) {
+ case SOF_IPC_REGION_UPBOX:
+ inbox_offset = elem->offset + MBOX_OFFSET;
+ inbox_size = elem->size;
+ snd_sof_debugfs_io_item(sdev,
+ sdev->bar[SOF_FW_BLK_TYPE_SRAM]
+ + inbox_offset,
+ elem->size, "inbox",
+ SOF_DEBUGFS_ACCESS_D0_ONLY);
+ break;
+ case SOF_IPC_REGION_DOWNBOX:
+ outbox_offset = elem->offset + MBOX_OFFSET;
+ outbox_size = elem->size;
+ snd_sof_debugfs_io_item(sdev,
+ sdev->bar[SOF_FW_BLK_TYPE_SRAM]
+ + outbox_offset,
+ elem->size, "outbox",
+ SOF_DEBUGFS_ACCESS_D0_ONLY);
+ break;
+ case SOF_IPC_REGION_TRACE:
+ snd_sof_debugfs_io_item(sdev,
+ sdev->bar[SOF_FW_BLK_TYPE_SRAM]
+ + elem->offset + MBOX_OFFSET,
+ elem->size, "etrace",
+ SOF_DEBUGFS_ACCESS_D0_ONLY);
+ break;
+ case SOF_IPC_REGION_DEBUG:
+ snd_sof_debugfs_io_item(sdev,
+ sdev->bar[SOF_FW_BLK_TYPE_SRAM]
+ + elem->offset + MBOX_OFFSET,
+ elem->size, "debug",
+ SOF_DEBUGFS_ACCESS_D0_ONLY);
+ break;
+ case SOF_IPC_REGION_STREAM:
+ stream_offset = elem->offset + MBOX_OFFSET;
+ stream_size = elem->size;
+ snd_sof_debugfs_io_item(sdev,
+ sdev->bar[SOF_FW_BLK_TYPE_SRAM]
+ + stream_offset,
+ elem->size, "stream",
+ SOF_DEBUGFS_ACCESS_D0_ONLY);
+ break;
+ case SOF_IPC_REGION_REGS:
+ snd_sof_debugfs_io_item(sdev,
+ sdev->bar[SOF_FW_BLK_TYPE_SRAM]
+ + elem->offset + MBOX_OFFSET,
+ elem->size, "regs",
+ SOF_DEBUGFS_ACCESS_D0_ONLY);
+ break;
+ case SOF_IPC_REGION_EXCEPTION:
+ sdev->dsp_oops_offset = elem->offset + MBOX_OFFSET;
+ snd_sof_debugfs_io_item(sdev,
+ sdev->bar[SOF_FW_BLK_TYPE_SRAM]
+ + elem->offset + MBOX_OFFSET,
+ elem->size, "exception",
+ SOF_DEBUGFS_ACCESS_D0_ONLY);
+ break;
+ default:
+ dev_err(sdev->dev, "error: get illegal window info\n");
+ return;
+ }
+ }
+
+ if (outbox_size == 0 || inbox_size == 0) {
+ dev_err(sdev->dev, "error: get illegal mailbox window\n");
+ return;
+ }
+
+ snd_sof_dsp_mailbox_init(sdev, inbox_offset, inbox_size,
+ outbox_offset, outbox_size);
+ sdev->stream_box.offset = stream_offset;
+ sdev->stream_box.size = stream_size;
+
+ dev_dbg(sdev->dev, " mailbox upstream 0x%x - size 0x%x\n",
+ inbox_offset, inbox_size);
+ dev_dbg(sdev->dev, " mailbox downstream 0x%x - size 0x%x\n",
+ outbox_offset, outbox_size);
+ dev_dbg(sdev->dev, " stream region 0x%x - size 0x%x\n",
+ stream_offset, stream_size);
+}
This looks 100% similar to Baytrail?
+
+/*
+ * IPC Firmware ready.
+ */
+static int imx8_fw_ready(struct snd_sof_dev *sdev, u32 msg_id)
+{
+ struct sof_ipc_fw_ready *fw_ready = &sdev->fw_ready;
+ u32 offset;
+ int ret;
+
+ /* mailbox must be on 4k boundary */
+ offset = MBOX_OFFSET;
+
+ dev_dbg(sdev->dev, "ipc: DSP is ready 0x%8.8x offset 0x%x\n",
+ msg_id, offset);
+
+ /* no need to re-check version/ABI for subsequent boots */
+ if (!sdev->first_boot)
+ return 0;
+
+ /* copy data from the DSP FW ready offset */
+ sof_block_read(sdev, sdev->mailbox_bar, offset, fw_ready,
+ sizeof(*fw_ready));
+ snd_sof_dsp_mailbox_init(sdev, fw_ready->dspbox_offset,
+ fw_ready->dspbox_size,
+ fw_ready->hostbox_offset,
+ fw_ready->hostbox_size);
+
+ /* make sure ABI version is compatible */
+ ret = snd_sof_ipc_valid(sdev);
+ if (ret < 0)
+ return ret;
+
+ /* now check for extended data */
+ snd_sof_fw_parse_ext_data(sdev, SOF_FW_BLK_TYPE_SRAM, MBOX_OFFSET +
+ sizeof(struct sof_ipc_fw_ready));
+
+ imx8_get_windows(sdev);
+
+ return 0;
+}
That code looks nearly similar to the baytrail one except for the last
line, we should look into factoring this.
+
+static void imx8_get_reply(struct snd_sof_dev *sdev)
+{
+ struct snd_sof_ipc_msg *msg = sdev->msg;
+ struct sof_ipc_reply reply;
+ unsigned long flags;
+ int ret = 0;
+
+ if (!msg) {
+ dev_warn(sdev->dev, "unexpected ipc interrupt\n");
+ return;
+ }
+
+ /* get reply */
+ sof_mailbox_read(sdev, sdev->host_box.offset, &reply, sizeof(reply));
+
+ spin_lock_irqsave(&sdev->ipc_lock, flags);
+
+ if (reply.error < 0) {
+ memcpy(msg->reply_data, &reply, sizeof(reply));
+ ret = reply.error;
+ } else {
+ /* reply has correct size? */
+ if (reply.hdr.size != msg->reply_size) {
+ dev_err(sdev->dev, "error: reply expected %zu got %u
bytes\n",
+ msg->reply_size, reply.hdr.size);
+ ret = -EINVAL;
+ }
+
+ /* read the message */
+ if (msg->reply_size > 0)
+ sof_mailbox_read(sdev, sdev->host_box.offset,
+ msg->reply_data, msg->reply_size);
+ }
+
+ msg->reply_error = ret;
+
+ spin_unlock_irqrestore(&sdev->ipc_lock, flags);
I don't see a spin_lock/unlock for the get_reply in the Intel code, is
this necessary?
+}
+
+void imx_dsp_handle_reply(struct imx_dsp_ipc *ipc)
+{
+ struct imx8_priv *priv = imx_dsp_get_data(ipc);
+
+ imx8_get_reply(priv->sdev);
+ snd_sof_ipc_reply(priv->sdev, 0);
+}
+
+void imx_dsp_handle_request(struct imx_dsp_ipc *ipc)
+{
+ struct imx8_priv *priv = imx_dsp_get_data(ipc);
+
+ snd_sof_ipc_msgs_rx(priv->sdev);
+}
+
+struct imx_dsp_ops dsp_ops = {
+ .handle_reply = imx_dsp_handle_reply,
+ .handle_request = imx_dsp_handle_request,
+};
+
+static int imx8_send_msg(struct snd_sof_dev *sdev, struct snd_sof_ipc_msg *msg)
+{
+ struct imx8_priv *priv = (struct imx8_priv *)sdev->private;
+
+ sof_mailbox_write(sdev, sdev->host_box.offset, msg->msg_data,
+ msg->msg_size);
+ imx_dsp_ring_doorbell(priv->dsp_ipc, 0);
+
+ return 0;
+}
+
+/*
+ * DSP control.
+ */
+static int imx8_run(struct snd_sof_dev *sdev)
+{
+ int ret;
+ struct imx8_priv *dsp_priv = (struct imx8_priv *)sdev->private;
+
+ ret = imx_sc_misc_set_control(dsp_priv->sc_ipc, IMX_SC_R_DSP,
+ IMX_SC_C_OFS_SEL, 1);
+ if (ret < 0) {
+ dev_err(sdev->dev, "Error system address offset source
select\n");
+ return ret;
+ }
+
+ ret = imx_sc_misc_set_control(dsp_priv->sc_ipc, IMX_SC_R_DSP,
+ IMX_SC_C_OFS_AUDIO, 0x80);
+ if (ret < 0) {
+ dev_err(sdev->dev, "Error system address offset of AUDIO\n");
+ return ret;
+ }
+
+ ret = imx_sc_misc_set_control(dsp_priv->sc_ipc, IMX_SC_R_DSP,
+ IMX_SC_C_OFS_PERIPH, 0x5A);
+ if (ret < 0) {
+ dev_err(sdev->dev, "Error system address offset of PERIPH %d\n",
+ ret);
+ return ret;
+ }
+
+ ret = imx_sc_misc_set_control(dsp_priv->sc_ipc, IMX_SC_R_DSP,
+ IMX_SC_C_OFS_IRQ, 0x51);
+ if (ret < 0) {
+ dev_err(sdev->dev, "Error system address offset of IRQ\n");
+ return ret;
+ }
+
+ imx_sc_pm_cpu_start(dsp_priv->sc_ipc, IMX_SC_R_DSP, true,
+ RESET_VECTOR_VADDR);
+
+ return 0;
+}
+
+static int imx8_probe(struct snd_sof_dev *sdev)
+{
+ struct imx8_priv *priv;
+ int i;
+ struct platform_device *pdev =
+ container_of(sdev->dev, struct platform_device, dev);
+ struct platform_device *ipc_dev;
+ struct resource *mmio;
+ int num_domains = 0;
+ u32 base, size;
+ int ret = 0;
+ struct device_node *np = pdev->dev.of_node;
+ struct device_node *res_node;
+ struct resource res;
nit-pick: can we reorder so that we have all counters last and a nice
xmas-tree shape.
+
+ priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ sdev->private = priv;
+ priv->dev = sdev->dev;
+ priv->sdev = sdev;
+
+ ret = imx_scu_get_handle(&priv->sc_ipc);
+ if (ret) {
+ dev_err(sdev->dev, "Cannot obtain SCU handle (err = %d)\n",
+ ret);
+ return ret;
+ }
+
+ ipc_dev = platform_device_register_data(sdev->dev, "imx-dsp",
+ PLATFORM_DEVID_NONE,
+ pdev, sizeof(*pdev));
+ if (IS_ERR(ipc_dev)) {
+ dev_err(sdev->dev, "Failed to register platform device\n");
+ return PTR_ERR(ipc_dev);
+ }
+
+ priv->dsp_ipc = dev_get_drvdata(&ipc_dev->dev);
+ if (!priv->dsp_ipc)
+ return -EPROBE_DEFER;
+
+ imx_dsp_set_data(priv->dsp_ipc, priv);
+ priv->dsp_ipc->ops = &dsp_ops;
+
+ num_domains = of_count_phandle_with_args(np, "power-domains",
+ "#power-domain-cells");
+ for (i = 0; i < num_domains; i++) {
+ struct device *pd_dev;
+ struct device_link *link;
+
+ pd_dev = dev_pm_domain_attach_by_id(&pdev->dev, i);
+ if (IS_ERR(pd_dev))
+ return PTR_ERR(pd_dev);
+
+ link = device_link_add(&pdev->dev, pd_dev,
+ DL_FLAG_STATELESS |
+ DL_FLAG_PM_RUNTIME |
+ DL_FLAG_RPM_ACTIVE);
+ if (IS_ERR(link))
+ return PTR_ERR(link);
Question: is the error flow final? Wondering if we release all the
resources/memory/devices on errors?
Also are all the resources device-managed, I don't see a remove()?
+ }
+
+ /* DSP base */
+ mmio = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (mmio) {
+ base = mmio->start;
+ size = resource_size(mmio);
+ } else {
+ dev_err(sdev->dev, "error: failed to get DSP base at idx 0\n");
+ return -EINVAL;
+ }
+
+ sdev->bar[SOF_FW_BLK_TYPE_IRAM] = devm_ioremap(sdev->dev, base, size);
+ if (!sdev->bar[SOF_FW_BLK_TYPE_IRAM]) {
+ dev_err(sdev->dev, "failed to ioremap base 0x%x size 0x%x\n",
+ base, size);
+ return -ENODEV;
+ }
+ sdev->mmio_bar = SOF_FW_BLK_TYPE_IRAM;
+
+ res_node = of_parse_phandle(np, "memory-region", 0);
+ if (!res_node) {
+ dev_err(&pdev->dev, "failed to get memory region node\n");
+ return -ENODEV;
+ }
+ if (of_address_to_resource(res_node, 0, &res)) {
+ dev_err(&pdev->dev, "failed to get reserved region address\n");
+ return -EINVAL;
+ }
+
+ sdev->bar[SOF_FW_BLK_TYPE_SRAM] = devm_ioremap_wc(sdev->dev, res.start,
+ res.end - res.start +
+ 1);
+ if (!sdev->bar[SOF_FW_BLK_TYPE_SRAM]) {
+ dev_err(sdev->dev, "failed to ioremap mem 0x%x size 0x%x\n",
+ base, size);
+ return -ENODEV;
+ }
+ sdev->mailbox_bar = SOF_FW_BLK_TYPE_SRAM;
+
+ return ret;
+}
+
+/* on i.MX8 there is 1 to 1 match between type and BAR idx */
+int imx8_get_bar_index(struct snd_sof_dev *sdev, u32 type)
+{
+ return type;
+}
+
+void imx8_ipc_msg_data(struct snd_sof_dev *sdev,
+ struct snd_pcm_substream *substream,
+ void *p, size_t sz)
+{
+ sof_mailbox_read(sdev, sdev->dsp_box.offset, p, sz);
+}
+
+int imx8_ipc_pcm_params(struct snd_sof_dev *sdev,
+ struct snd_pcm_substream *substream,
+ const struct sof_ipc_pcm_params_reply *reply)
+{
+ return 0;
+}
+
+static struct snd_soc_dai_driver imx8_dai[] = {
+{
+ .name = "esai-port",
+},
+};
+
+/* i.MX8 ops */
+struct snd_sof_dsp_ops sof_imx8_ops = {
+ /* device init */
+ .probe = imx8_probe,
+
+ /* DSP core boot */
+ .run = imx8_run,
+
+ /* Block IO */
+ .block_read = sof_block_read,
+ .block_write = sof_block_write,
+
+ /* ipc */
+ .send_msg = imx8_send_msg,
+ .fw_ready = imx8_fw_ready,
+
+ .ipc_msg_data = imx8_ipc_msg_data,
+ .ipc_pcm_params = imx8_ipc_pcm_params,
+
+ /* module loading */
+ .load_module = snd_sof_parse_module_memcpy,
+ .get_bar_index = imx8_get_bar_index,
+ /* firmware loading */
+ .load_firmware = snd_sof_load_firmware_memcpy,
+
+ /* DAI drivers */
+ .drv = imx8_dai,
+ .num_drv = 1, /* we have only 1 ESAI interface on i.MX8 */
+};
+EXPORT_SYMBOL(sof_imx8_ops);
+
+MODULE_LICENSE("Dual BSD/GPL");
