// SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
//
// Copyright 2020 NXP
//
// Author: Daniel Baluta <[email protected]>
//
// Hardware interface for audio DSP on i.MX8M
#include <linux/bits.h>
#include <linux/firmware.h>
#include <linux/mfd/syscon.h>
#include <linux/of_platform.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <linux/regmap.h>
#include <linux/module.h>
#include <sound/sof.h>
#include <sound/sof/xtensa.h>
#include <linux/firmware/imx/dsp.h>
#include "../ops.h"
#include "../sof-of-dev.h"
#include "imx-common.h"
#define MBOX_OFFSET 0x800000
#define MBOX_SIZE 0x1000
/* DAP registers */
#define IMX8M_DAP_DEBUG 0x28800000
#define IMX8M_DAP_DEBUG_SIZE (64 * 1024)
#define IMX8M_DAP_PWRCTL (0x4000 + 0x3020)
#define IMX8M_PWRCTL_CORERESET BIT(16)
/* DSP audio mix registers */
#define AudioDSP_REG0 0x100
#define AudioDSP_REG1 0x104
#define AudioDSP_REG2 0x108
#define AudioDSP_REG3 0x10c
#define AudioDSP_REG2_RUNSTALL BIT(5)
struct imx8m_priv {
struct device *dev;
struct snd_sof_dev *sdev;
/* DSP IPC handler */
struct imx_dsp_ipc *dsp_ipc;
struct platform_device *ipc_dev;
struct clk_bulk_data *clks;
int clk_num;
void __iomem *dap;
struct regmap *regmap;
};
static int imx8m_get_mailbox_offset(struct snd_sof_dev *sdev)
{
return MBOX_OFFSET;
}
static int imx8m_get_window_offset(struct snd_sof_dev *sdev, u32 id)
{
return MBOX_OFFSET;
}
static void imx8m_dsp_handle_reply(struct imx_dsp_ipc *ipc)
{
struct imx8m_priv *priv = imx_dsp_get_data(ipc);
unsigned long flags;
spin_lock_irqsave(&priv->sdev->ipc_lock, flags);
snd_sof_ipc_process_reply(priv->sdev, 0);
spin_unlock_irqrestore(&priv->sdev->ipc_lock, flags);
}
static void imx8m_dsp_handle_request(struct imx_dsp_ipc *ipc)
{
struct imx8m_priv *priv = imx_dsp_get_data(ipc);
u32 p; /* Panic code */
/* Read the message from the debug box. */
sof_mailbox_read(priv->sdev, priv->sdev->debug_box.offset + 4, &p, sizeof(p));
/* Check to see if the message is a panic code (0x0dead***) */
if ((p & SOF_IPC_PANIC_MAGIC_MASK) == SOF_IPC_PANIC_MAGIC)
snd_sof_dsp_panic(priv->sdev, p, true);
else
snd_sof_ipc_msgs_rx(priv->sdev);
}
static struct imx_dsp_ops imx8m_dsp_ops = {
.handle_reply = imx8m_dsp_handle_reply,
.handle_request = imx8m_dsp_handle_request,
};
static int imx8m_send_msg(struct snd_sof_dev *sdev, struct snd_sof_ipc_msg *msg)
{
struct imx8m_priv *priv = sdev->pdata->hw_pdata;
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 imx8m_run(struct snd_sof_dev *sdev)
{
struct imx8m_priv *priv = (struct imx8m_priv *)sdev->pdata->hw_pdata;
regmap_update_bits(priv->regmap, AudioDSP_REG2, AudioDSP_REG2_RUNSTALL, 0);
return 0;
}
static int imx8m_reset(struct snd_sof_dev *sdev)
{
struct imx8m_priv *priv = (struct imx8m_priv *)sdev->pdata->hw_pdata;
u32 pwrctl;
/* put DSP into reset and stall */
pwrctl = readl(priv->dap + IMX8M_DAP_PWRCTL);
pwrctl |= IMX8M_PWRCTL_CORERESET;
writel(pwrctl, priv->dap + IMX8M_DAP_PWRCTL);
/* keep reset asserted for 10 cycles */
usleep_range(1, 2);
regmap_update_bits(priv->regmap, AudioDSP_REG2,
AudioDSP_REG2_RUNSTALL, AudioDSP_REG2_RUNSTALL);
/* take the DSP out of reset and keep stalled for FW loading */
pwrctl = readl(priv->dap + IMX8M_DAP_PWRCTL);
pwrctl &= ~IMX8M_PWRCTL_CORERESET;
writel(pwrctl, priv->dap + IMX8M_DAP_PWRCTL);
return 0;
}
static int imx8m_probe(struct snd_sof_dev *sdev)
{
struct platform_device *pdev =
container_of(sdev->dev, struct platform_device, dev);
struct device_node *np = pdev->dev.of_node;
struct device_node *res_node;
struct resource *mmio;
struct imx8m_priv *priv;
struct resource res;
u32 base, size;
int ret = 0;
priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
sdev->num_cores = 1;
sdev->pdata->hw_pdata = priv;
priv->dev = sdev->dev;
priv->sdev = sdev;
priv->ipc_dev = platform_device_register_data(sdev->dev, "imx-dsp",
PLATFORM_DEVID_NONE,
pdev, sizeof(*pdev));
if (IS_ERR(priv->ipc_dev))
return PTR_ERR(priv->ipc_dev);
priv->dsp_ipc = dev_get_drvdata(&priv->ipc_dev->dev);
if (!priv->dsp_ipc) {
/* DSP IPC driver not probed yet, try later */
ret = -EPROBE_DEFER;
dev_err(sdev->dev, "Failed to get drvdata\n");
goto exit_pdev_unregister;
}
imx_dsp_set_data(priv->dsp_ipc, priv);
priv->dsp_ipc->ops = &imx8m_dsp_ops;
/* 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");
ret = -EINVAL;
goto exit_pdev_unregister;
}
priv->dap = devm_ioremap(sdev->dev, IMX8M_DAP_DEBUG, IMX8M_DAP_DEBUG_SIZE);
if (!priv->dap) {
dev_err(sdev->dev, "error: failed to map DAP debug memory area");
ret = -ENODEV;
goto exit_pdev_unregister;
}
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);
ret = -ENODEV;
goto exit_pdev_unregister;
}
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");
ret = -ENODEV;
goto exit_pdev_unregister;
}
ret = of_address_to_resource(res_node, 0, &res);
of_node_put(res_node);
if (ret) {
dev_err(&pdev->dev, "failed to get reserved region address\n");
goto exit_pdev_unregister;
}
sdev->bar[SOF_FW_BLK_TYPE_SRAM] = devm_ioremap_wc(sdev->dev, res.start,
resource_size(&res));
if (!sdev->bar[SOF_FW_BLK_TYPE_SRAM]) {
dev_err(sdev->dev, "failed to ioremap mem 0x%x size 0x%x\n",
base, size);
ret = -ENOMEM;
goto exit_pdev_unregister;
}
sdev->mailbox_bar = SOF_FW_BLK_TYPE_SRAM;
/* set default mailbox offset for FW ready message */
sdev->dsp_box.offset = MBOX_OFFSET;
priv->regmap = syscon_regmap_lookup_by_phandle(np, "fsl,dsp-ctrl");
if (IS_ERR(priv->regmap)) {
dev_err(sdev->dev, "cannot find dsp-ctrl registers");
ret = PTR_ERR(priv->regmap);
goto exit_pdev_unregister;
}
ret = devm_clk_bulk_get_all(sdev->dev, &priv->clks);
if (ret < 0) {
dev_err(sdev->dev, "failed to fetch clocks: %d\n", ret);
goto exit_pdev_unregister;
}
priv->clk_num = ret;
ret = clk_bulk_prepare_enable(priv->clk_num, priv->clks);
if (ret < 0) {
dev_err(sdev->dev, "failed to enable clocks: %d\n", ret);
goto exit_pdev_unregister;
}
return 0;
exit_pdev_unregister:
platform_device_unregister(priv->ipc_dev);
return ret;
}
static void imx8m_remove(struct snd_sof_dev *sdev)
{
struct imx8m_priv *priv = sdev->pdata->hw_pdata;
clk_bulk_disable_unprepare(priv->clk_num, priv->clks);
platform_device_unregister(priv->ipc_dev);
}
/* on i.MX8 there is 1 to 1 match between type and BAR idx */
static int imx8m_get_bar_index(struct snd_sof_dev *sdev, u32 type)
{
/* Only IRAM and SRAM bars are valid */
switch (type) {
case SOF_FW_BLK_TYPE_IRAM:
case SOF_FW_BLK_TYPE_SRAM:
return type;
default:
return -EINVAL;
}
}
static struct snd_soc_dai_driver imx8m_dai[] = {
{
.name = "sai1",
.playback = {
.channels_min = 1,
.channels_max = 32,
},
.capture = {
.channels_min = 1,
.channels_max = 32,
},
},
{
.name = "sai3",
.playback = {
.channels_min = 1,
.channels_max = 32,
},
.capture = {
.channels_min = 1,
.channels_max = 32,
},
},
{
.name = "micfil",
.capture = {
.channels_min = 1,
.channels_max = 8,
},
},
};
static int imx8m_dsp_set_power_state(struct snd_sof_dev *sdev,
const struct sof_dsp_power_state *target_state)
{
sdev->dsp_power_state = *target_state;
return 0;
}
static int imx8m_resume(struct snd_sof_dev *sdev)
{
struct imx8m_priv *priv = (struct imx8m_priv *)sdev->pdata->hw_pdata;
int ret;
int i;
ret = clk_bulk_prepare_enable(priv->clk_num, priv->clks);
if (ret < 0) {
dev_err(sdev->dev, "failed to enable clocks: %d\n", ret);
return ret;
}
for (i = 0; i < DSP_MU_CHAN_NUM; i++)
imx_dsp_request_channel(priv->dsp_ipc, i);
return 0;
}
static void imx8m_suspend(struct snd_sof_dev *sdev)
{
struct imx8m_priv *priv = (struct imx8m_priv *)sdev->pdata->hw_pdata;
int i;
for (i = 0; i < DSP_MU_CHAN_NUM; i++)
imx_dsp_free_channel(priv->dsp_ipc, i);
clk_bulk_disable_unprepare(priv->clk_num, priv->clks);
}
static int imx8m_dsp_runtime_resume(struct snd_sof_dev *sdev)
{
int ret;
const struct sof_dsp_power_state target_dsp_state = {
.state = SOF_DSP_PM_D0,
};
ret = imx8m_resume(sdev);
if (ret < 0)
return ret;
return snd_sof_dsp_set_power_state(sdev, &target_dsp_state);
}
static int imx8m_dsp_runtime_suspend(struct snd_sof_dev *sdev)
{
const struct sof_dsp_power_state target_dsp_state = {
.state = SOF_DSP_PM_D3,
};
imx8m_suspend(sdev);
return snd_sof_dsp_set_power_state(sdev, &target_dsp_state);
}
static int imx8m_dsp_resume(struct snd_sof_dev *sdev)
{
int ret;
const struct sof_dsp_power_state target_dsp_state = {
.state = SOF_DSP_PM_D0,
};
ret = imx8m_resume(sdev);
if (ret < 0)
return ret;
if (pm_runtime_suspended(sdev->dev)) {
pm_runtime_disable(sdev->dev);
pm_runtime_set_active(sdev->dev);
pm_runtime_mark_last_busy(sdev->dev);
pm_runtime_enable(sdev->dev);
pm_runtime_idle(sdev->dev);
}
return snd_sof_dsp_set_power_state(sdev, &target_dsp_state);
}
static int imx8m_dsp_suspend(struct snd_sof_dev *sdev, unsigned int target_state)
{
const struct sof_dsp_power_state target_dsp_state = {
.state = target_state,
};
if (!pm_runtime_suspended(sdev->dev))
imx8m_suspend(sdev);
return snd_sof_dsp_set_power_state(sdev, &target_dsp_state);
}
/* i.MX8 ops */
static const struct snd_sof_dsp_ops sof_imx8m_ops = {
/* probe and remove */
.probe = imx8m_probe,
.remove = imx8m_remove,
/* DSP core boot */
.run = imx8m_run,
.reset = imx8m_reset,
/* Block IO */
.block_read = sof_block_read,
.block_write = sof_block_write,
/* Mailbox IO */
.mailbox_read = sof_mailbox_read,
.mailbox_write = sof_mailbox_write,
/* ipc */
.send_msg = imx8m_send_msg,
.get_mailbox_offset = imx8m_get_mailbox_offset,
.get_window_offset = imx8m_get_window_offset,
.ipc_msg_data = sof_ipc_msg_data,
.set_stream_data_offset = sof_set_stream_data_offset,
.get_bar_index = imx8m_get_bar_index,
/* firmware loading */
.load_firmware = snd_sof_load_firmware_memcpy,
/* Debug information */
.dbg_dump = imx8_dump,
.debugfs_add_region_item = snd_sof_debugfs_add_region_item_iomem,
/* stream callbacks */
.pcm_open = sof_stream_pcm_open,
.pcm_close = sof_stream_pcm_close,
/* Firmware ops */
.dsp_arch_ops = &sof_xtensa_arch_ops,
/* DAI drivers */
.drv = imx8m_dai,
.num_drv = ARRAY_SIZE(imx8m_dai),
.suspend = imx8m_dsp_suspend,
.resume = imx8m_dsp_resume,
.runtime_suspend = imx8m_dsp_runtime_suspend,
.runtime_resume = imx8m_dsp_runtime_resume,
.set_power_state = imx8m_dsp_set_power_state,
.hw_info = SNDRV_PCM_INFO_MMAP |
SNDRV_PCM_INFO_MMAP_VALID |
SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_PAUSE |
SNDRV_PCM_INFO_BATCH |
SNDRV_PCM_INFO_NO_PERIOD_WAKEUP,
};
static struct snd_sof_of_mach sof_imx8mp_machs[] = {
{
.compatible = "fsl,imx8mp-evk",
.sof_tplg_filename = "sof-imx8mp-wm8960.tplg",
.drv_name = "asoc-audio-graph-card2",
},
{}
};
static struct sof_dev_desc sof_of_imx8mp_desc = {
.of_machines = sof_imx8mp_machs,
.ipc_supported_mask = BIT(SOF_IPC_TYPE_3),
.ipc_default = SOF_IPC_TYPE_3,
.default_fw_path = {
[SOF_IPC_TYPE_3] = "imx/sof",
},
.default_tplg_path = {
[SOF_IPC_TYPE_3] = "imx/sof-tplg",
},
.default_fw_filename = {
[SOF_IPC_TYPE_3] = "sof-imx8m.ri",
},
.nocodec_tplg_filename = "sof-imx8-nocodec.tplg",
.ops = &sof_imx8m_ops,
};
static const struct of_device_id sof_of_imx8m_ids[] = {
{ .compatible = "fsl,imx8mp-dsp", .data = &sof_of_imx8mp_desc},
{ }
};
MODULE_DEVICE_TABLE(of, sof_of_imx8m_ids);
/* DT driver definition */
static struct platform_driver snd_sof_of_imx8m_driver = {
.probe = sof_of_probe,
.remove = sof_of_remove,
.driver = {
.name = "sof-audio-of-imx8m",
.pm = &sof_of_pm,
.of_match_table = sof_of_imx8m_ids,
},
};
module_platform_driver(snd_sof_of_imx8m_driver);
MODULE_LICENSE("Dual BSD/GPL");
MODULE_DESCRIPTION("SOF support for IMX8M platforms");
MODULE_IMPORT_NS(SND_SOC_SOF_XTENSA);
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