sound/soc/sof/imx/imx8m.c

   1 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
   2 //
   3 // Copyright 2020 NXP
   4 //
   5 // Author: Daniel Baluta <daniel.baluta@nxp.com>
   6 //
   7 // Hardware interface for audio DSP on i.MX8M
   8
   9 #include <linux/firmware.h>
  10 #include <linux/of_platform.h>
  11 #include <linux/of_address.h>
  12 #include <linux/of_irq.h>
  13
  14 #include <linux/module.h>
  15 #include <sound/sof.h>
  16 #include <sound/sof/xtensa.h>
  17 #include <linux/firmware/imx/dsp.h>
  18
  19 #include "../ops.h"
  20 #include "imx-common.h"
  21
  22 #define MBOX_OFFSET     0x800000
  23 #define MBOX_SIZE       0x1000
  24
  25 struct imx8m_priv {
  26         struct device *dev;
  27         struct snd_sof_dev *sdev;
  28
  29         /* DSP IPC handler */
  30         struct imx_dsp_ipc *dsp_ipc;
  31         struct platform_device *ipc_dev;
  32 };
  33
  34 static void imx8m_get_reply(struct snd_sof_dev *sdev)
  35 {
  36         struct snd_sof_ipc_msg *msg = sdev->msg;
  37         struct sof_ipc_reply reply;
  38         int ret = 0;
  39
  40         if (!msg) {
  41                 dev_warn(sdev->dev, "unexpected ipc interrupt\n");
  42                 return;
  43         }
  44
  45         /* get reply */
  46         sof_mailbox_read(sdev, sdev->host_box.offset, &reply, sizeof(reply));
  47
  48         if (reply.error < 0) {
  49                 memcpy(msg->reply_data, &reply, sizeof(reply));
  50                 ret = reply.error;
  51         } else {
  52                 /* reply has correct size? */
  53                 if (reply.hdr.size != msg->reply_size) {
  54                         dev_err(sdev->dev, "error: reply expected %zu got %u bytes\n",
  55                                 msg->reply_size, reply.hdr.size);
  56                         ret = -EINVAL;
  57                 }
  58
  59                 /* read the message */
  60                 if (msg->reply_size > 0)
  61                         sof_mailbox_read(sdev, sdev->host_box.offset,
  62                                          msg->reply_data, msg->reply_size);
  63         }
  64
  65         msg->reply_error = ret;
  66 }
  67
  68 static int imx8m_get_mailbox_offset(struct snd_sof_dev *sdev)
  69 {
  70         return MBOX_OFFSET;
  71 }
  72
  73 static int imx8m_get_window_offset(struct snd_sof_dev *sdev, u32 id)
  74 {
  75         return MBOX_OFFSET;
  76 }
  77
  78 static void imx8m_dsp_handle_reply(struct imx_dsp_ipc *ipc)
  79 {
  80         struct imx8m_priv *priv = imx_dsp_get_data(ipc);
  81         unsigned long flags;
  82
  83         spin_lock_irqsave(&priv->sdev->ipc_lock, flags);
  84         imx8m_get_reply(priv->sdev);
  85         snd_sof_ipc_reply(priv->sdev, 0);
  86         spin_unlock_irqrestore(&priv->sdev->ipc_lock, flags);
  87 }
  88
  89 static void imx8m_dsp_handle_request(struct imx_dsp_ipc *ipc)
  90 {
  91         struct imx8m_priv *priv = imx_dsp_get_data(ipc);
  92         u32 p; /* Panic code */
  93
  94         /* Read the message from the debug box. */
  95         sof_mailbox_read(priv->sdev, priv->sdev->debug_box.offset + 4, &p, sizeof(p));
  96
  97         /* Check to see if the message is a panic code (0x0dead***) */
  98         if ((p & SOF_IPC_PANIC_MAGIC_MASK) == SOF_IPC_PANIC_MAGIC)
  99                 snd_sof_dsp_panic(priv->sdev, p);
 100         else
 101                 snd_sof_ipc_msgs_rx(priv->sdev);
 102 }
 103
 104 static struct imx_dsp_ops imx8m_dsp_ops = {
 105         .handle_reply           = imx8m_dsp_handle_reply,
 106         .handle_request         = imx8m_dsp_handle_request,
 107 };
 108
 109 static int imx8m_send_msg(struct snd_sof_dev *sdev, struct snd_sof_ipc_msg *msg)
 110 {
 111         struct imx8m_priv *priv = sdev->pdata->hw_pdata;
 112
 113         sof_mailbox_write(sdev, sdev->host_box.offset, msg->msg_data,
 114                           msg->msg_size);
 115         imx_dsp_ring_doorbell(priv->dsp_ipc, 0);
 116
 117         return 0;
 118 }
 119
 120 /*
 121  * DSP control.
 122  */
 123 static int imx8m_run(struct snd_sof_dev *sdev)
 124 {
 125         /* TODO: start DSP using Audio MIX bits */
 126         return 0;
 127 }
 128
 129 static int imx8m_probe(struct snd_sof_dev *sdev)
 130 {
 131         struct platform_device *pdev =
 132                 container_of(sdev->dev, struct platform_device, dev);
 133         struct device_node *np = pdev->dev.of_node;
 134         struct device_node *res_node;
 135         struct resource *mmio;
 136         struct imx8m_priv *priv;
 137         struct resource res;
 138         u32 base, size;
 139         int ret = 0;
 140
 141         priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
 142         if (!priv)
 143                 return -ENOMEM;
 144
 145         sdev->pdata->hw_pdata = priv;
 146         priv->dev = sdev->dev;
 147         priv->sdev = sdev;
 148
 149         priv->ipc_dev = platform_device_register_data(sdev->dev, "imx-dsp",
 150                                                       PLATFORM_DEVID_NONE,
 151                                                       pdev, sizeof(*pdev));
 152         if (IS_ERR(priv->ipc_dev))
 153                 return PTR_ERR(priv->ipc_dev);
 154
 155         priv->dsp_ipc = dev_get_drvdata(&priv->ipc_dev->dev);
 156         if (!priv->dsp_ipc) {
 157                 /* DSP IPC driver not probed yet, try later */
 158                 ret = -EPROBE_DEFER;
 159                 dev_err(sdev->dev, "Failed to get drvdata\n");
 160                 goto exit_pdev_unregister;
 161         }
 162
 163         imx_dsp_set_data(priv->dsp_ipc, priv);
 164         priv->dsp_ipc->ops = &imx8m_dsp_ops;
 165
 166         /* DSP base */
 167         mmio = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 168         if (mmio) {
 169                 base = mmio->start;
 170                 size = resource_size(mmio);
 171         } else {
 172                 dev_err(sdev->dev, "error: failed to get DSP base at idx 0\n");
 173                 ret = -EINVAL;
 174                 goto exit_pdev_unregister;
 175         }
 176
 177         sdev->bar[SOF_FW_BLK_TYPE_IRAM] = devm_ioremap(sdev->dev, base, size);
 178         if (!sdev->bar[SOF_FW_BLK_TYPE_IRAM]) {
 179                 dev_err(sdev->dev, "failed to ioremap base 0x%x size 0x%x\n",
 180                         base, size);
 181                 ret = -ENODEV;
 182                 goto exit_pdev_unregister;
 183         }
 184         sdev->mmio_bar = SOF_FW_BLK_TYPE_IRAM;
 185
 186         res_node = of_parse_phandle(np, "memory-region", 0);
 187         if (!res_node) {
 188                 dev_err(&pdev->dev, "failed to get memory region node\n");
 189                 ret = -ENODEV;
 190                 goto exit_pdev_unregister;
 191         }
 192
 193         ret = of_address_to_resource(res_node, 0, &res);
 194         if (ret) {
 195                 dev_err(&pdev->dev, "failed to get reserved region address\n");
 196                 goto exit_pdev_unregister;
 197         }
 198
 199         sdev->bar[SOF_FW_BLK_TYPE_SRAM] = devm_ioremap_wc(sdev->dev, res.start,
 200                                                           resource_size(&res));
 201         if (!sdev->bar[SOF_FW_BLK_TYPE_SRAM]) {
 202                 dev_err(sdev->dev, "failed to ioremap mem 0x%x size 0x%x\n",
 203                         base, size);
 204                 ret = -ENOMEM;
 205                 goto exit_pdev_unregister;
 206         }
 207         sdev->mailbox_bar = SOF_FW_BLK_TYPE_SRAM;
 208
 209         /* set default mailbox offset for FW ready message */
 210         sdev->dsp_box.offset = MBOX_OFFSET;
 211
 212         return 0;
 213
 214 exit_pdev_unregister:
 215         platform_device_unregister(priv->ipc_dev);
 216         return ret;
 217 }
 218
 219 static int imx8m_remove(struct snd_sof_dev *sdev)
 220 {
 221         struct imx8m_priv *priv = sdev->pdata->hw_pdata;
 222
 223         platform_device_unregister(priv->ipc_dev);
 224
 225         return 0;
 226 }
 227
 228 /* on i.MX8 there is 1 to 1 match between type and BAR idx */
 229 static int imx8m_get_bar_index(struct snd_sof_dev *sdev, u32 type)
 230 {
 231         return type;
 232 }
 233
 234 static void imx8m_ipc_msg_data(struct snd_sof_dev *sdev,
 235                                struct snd_pcm_substream *substream,
 236                                void *p, size_t sz)
 237 {
 238         sof_mailbox_read(sdev, sdev->dsp_box.offset, p, sz);
 239 }
 240
 241 static int imx8m_ipc_pcm_params(struct snd_sof_dev *sdev,
 242                                 struct snd_pcm_substream *substream,
 243                                 const struct sof_ipc_pcm_params_reply *reply)
 244 {
 245         return 0;
 246 }
 247
 248 static struct snd_soc_dai_driver imx8m_dai[] = {
 249 {
 250         .name = "sai3",
 251         .playback = {
 252                 .channels_min = 1,
 253                 .channels_max = 32,
 254         },
 255         .capture = {
 256                 .channels_min = 1,
 257                 .channels_max = 32,
 258         },
 259 },
 260 };
 261
 262 /* i.MX8 ops */
 263 struct snd_sof_dsp_ops sof_imx8m_ops = {
 264         /* probe and remove */
 265         .probe          = imx8m_probe,
 266         .remove         = imx8m_remove,
 267         /* DSP core boot */
 268         .run            = imx8m_run,
 269
 270         /* Block IO */
 271         .block_read     = sof_block_read,
 272         .block_write    = sof_block_write,
 273
 274         /* Module IO */
 275         .read64 = sof_io_read64,
 276
 277         /* ipc */
 278         .send_msg       = imx8m_send_msg,
 279         .fw_ready       = sof_fw_ready,
 280         .get_mailbox_offset     = imx8m_get_mailbox_offset,
 281         .get_window_offset      = imx8m_get_window_offset,
 282
 283         .ipc_msg_data   = imx8m_ipc_msg_data,
 284         .ipc_pcm_params = imx8m_ipc_pcm_params,
 285
 286         /* module loading */
 287         .load_module    = snd_sof_parse_module_memcpy,
 288         .get_bar_index  = imx8m_get_bar_index,
 289         /* firmware loading */
 290         .load_firmware  = snd_sof_load_firmware_memcpy,
 291
 292         /* Debug information */
 293         .dbg_dump = imx8_dump,
 294
 295         /* Firmware ops */
 296         .arch_ops = &sof_xtensa_arch_ops,
 297
 298         /* DAI drivers */
 299         .drv = imx8m_dai,
 300         .num_drv = ARRAY_SIZE(imx8m_dai),
 301
 302         .hw_info = SNDRV_PCM_INFO_MMAP |
 303                 SNDRV_PCM_INFO_MMAP_VALID |
 304                 SNDRV_PCM_INFO_INTERLEAVED |
 305                 SNDRV_PCM_INFO_PAUSE |
 306                 SNDRV_PCM_INFO_NO_PERIOD_WAKEUP,
 307 };
 308 EXPORT_SYMBOL(sof_imx8m_ops);
 309
 310 MODULE_IMPORT_NS(SND_SOC_SOF_XTENSA);
 311 MODULE_LICENSE("Dual BSD/GPL");