[Sound-open-firmware] [PATCH v2 1/5] ASoC: SOF: imx: Add i.MX8 HW support
Pierre-Louis Bossart
pierre-louis.bossart at linux.intel.com
Tue Jul 23 17:01:22 CEST 2019
> 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");
>
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