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- // SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
- //
- // This file is provided under a dual BSD/GPLv2 license. When using or
- // redistributing this file, you may do so under either license.
- //
- // Copyright(c) 2018-2021 Intel Corporation. All rights reserved.
- //
- // Author: Liam Girdwood <[email protected]>
- //
- /*
- * Hardware interface for audio DSP on Atom devices
- */
- #include <linux/module.h>
- #include <sound/sof.h>
- #include <sound/sof/xtensa.h>
- #include <sound/soc-acpi.h>
- #include <sound/soc-acpi-intel-match.h>
- #include <sound/intel-dsp-config.h>
- #include "../ops.h"
- #include "shim.h"
- #include "atom.h"
- #include "../sof-acpi-dev.h"
- #include "../sof-audio.h"
- #include "../../intel/common/soc-intel-quirks.h"
- static void atom_host_done(struct snd_sof_dev *sdev);
- static void atom_dsp_done(struct snd_sof_dev *sdev);
- /*
- * Debug
- */
- static void atom_get_registers(struct snd_sof_dev *sdev,
- struct sof_ipc_dsp_oops_xtensa *xoops,
- struct sof_ipc_panic_info *panic_info,
- u32 *stack, size_t stack_words)
- {
- u32 offset = sdev->dsp_oops_offset;
- /* first read regsisters */
- sof_mailbox_read(sdev, offset, xoops, sizeof(*xoops));
- /* note: variable AR register array is not read */
- /* then get panic info */
- if (xoops->arch_hdr.totalsize > EXCEPT_MAX_HDR_SIZE) {
- dev_err(sdev->dev, "invalid header size 0x%x. FW oops is bogus\n",
- xoops->arch_hdr.totalsize);
- return;
- }
- offset += xoops->arch_hdr.totalsize;
- sof_mailbox_read(sdev, offset, panic_info, sizeof(*panic_info));
- /* then get the stack */
- offset += sizeof(*panic_info);
- sof_mailbox_read(sdev, offset, stack, stack_words * sizeof(u32));
- }
- void atom_dump(struct snd_sof_dev *sdev, u32 flags)
- {
- struct sof_ipc_dsp_oops_xtensa xoops;
- struct sof_ipc_panic_info panic_info;
- u32 stack[STACK_DUMP_SIZE];
- u64 status, panic, imrd, imrx;
- /* now try generic SOF status messages */
- status = snd_sof_dsp_read64(sdev, DSP_BAR, SHIM_IPCD);
- panic = snd_sof_dsp_read64(sdev, DSP_BAR, SHIM_IPCX);
- atom_get_registers(sdev, &xoops, &panic_info, stack,
- STACK_DUMP_SIZE);
- sof_print_oops_and_stack(sdev, KERN_ERR, status, panic, &xoops,
- &panic_info, stack, STACK_DUMP_SIZE);
- /* provide some context for firmware debug */
- imrx = snd_sof_dsp_read64(sdev, DSP_BAR, SHIM_IMRX);
- imrd = snd_sof_dsp_read64(sdev, DSP_BAR, SHIM_IMRD);
- dev_err(sdev->dev,
- "error: ipc host -> DSP: pending %s complete %s raw 0x%llx\n",
- (panic & SHIM_IPCX_BUSY) ? "yes" : "no",
- (panic & SHIM_IPCX_DONE) ? "yes" : "no", panic);
- dev_err(sdev->dev,
- "error: mask host: pending %s complete %s raw 0x%llx\n",
- (imrx & SHIM_IMRX_BUSY) ? "yes" : "no",
- (imrx & SHIM_IMRX_DONE) ? "yes" : "no", imrx);
- dev_err(sdev->dev,
- "error: ipc DSP -> host: pending %s complete %s raw 0x%llx\n",
- (status & SHIM_IPCD_BUSY) ? "yes" : "no",
- (status & SHIM_IPCD_DONE) ? "yes" : "no", status);
- dev_err(sdev->dev,
- "error: mask DSP: pending %s complete %s raw 0x%llx\n",
- (imrd & SHIM_IMRD_BUSY) ? "yes" : "no",
- (imrd & SHIM_IMRD_DONE) ? "yes" : "no", imrd);
- }
- EXPORT_SYMBOL_NS(atom_dump, SND_SOC_SOF_INTEL_ATOM_HIFI_EP);
- /*
- * IPC Doorbell IRQ handler and thread.
- */
- irqreturn_t atom_irq_handler(int irq, void *context)
- {
- struct snd_sof_dev *sdev = context;
- u64 ipcx, ipcd;
- int ret = IRQ_NONE;
- ipcx = snd_sof_dsp_read64(sdev, DSP_BAR, SHIM_IPCX);
- ipcd = snd_sof_dsp_read64(sdev, DSP_BAR, SHIM_IPCD);
- if (ipcx & SHIM_BYT_IPCX_DONE) {
- /* reply message from DSP, Mask Done interrupt first */
- snd_sof_dsp_update_bits64_unlocked(sdev, DSP_BAR,
- SHIM_IMRX,
- SHIM_IMRX_DONE,
- SHIM_IMRX_DONE);
- ret = IRQ_WAKE_THREAD;
- }
- if (ipcd & SHIM_BYT_IPCD_BUSY) {
- /* new message from DSP, Mask Busy interrupt first */
- snd_sof_dsp_update_bits64_unlocked(sdev, DSP_BAR,
- SHIM_IMRX,
- SHIM_IMRX_BUSY,
- SHIM_IMRX_BUSY);
- ret = IRQ_WAKE_THREAD;
- }
- return ret;
- }
- EXPORT_SYMBOL_NS(atom_irq_handler, SND_SOC_SOF_INTEL_ATOM_HIFI_EP);
- irqreturn_t atom_irq_thread(int irq, void *context)
- {
- struct snd_sof_dev *sdev = context;
- u64 ipcx, ipcd;
- ipcx = snd_sof_dsp_read64(sdev, DSP_BAR, SHIM_IPCX);
- ipcd = snd_sof_dsp_read64(sdev, DSP_BAR, SHIM_IPCD);
- /* reply message from DSP */
- if (ipcx & SHIM_BYT_IPCX_DONE) {
- spin_lock_irq(&sdev->ipc_lock);
- /*
- * handle immediate reply from DSP core. If the msg is
- * found, set done bit in cmd_done which is called at the
- * end of message processing function, else set it here
- * because the done bit can't be set in cmd_done function
- * which is triggered by msg
- */
- snd_sof_ipc_process_reply(sdev, ipcx);
- atom_dsp_done(sdev);
- spin_unlock_irq(&sdev->ipc_lock);
- }
- /* new message from DSP */
- if (ipcd & SHIM_BYT_IPCD_BUSY) {
- /* Handle messages from DSP Core */
- if ((ipcd & SOF_IPC_PANIC_MAGIC_MASK) == SOF_IPC_PANIC_MAGIC) {
- snd_sof_dsp_panic(sdev, PANIC_OFFSET(ipcd) + MBOX_OFFSET,
- true);
- } else {
- snd_sof_ipc_msgs_rx(sdev);
- }
- atom_host_done(sdev);
- }
- return IRQ_HANDLED;
- }
- EXPORT_SYMBOL_NS(atom_irq_thread, SND_SOC_SOF_INTEL_ATOM_HIFI_EP);
- int atom_send_msg(struct snd_sof_dev *sdev, struct snd_sof_ipc_msg *msg)
- {
- /* unmask and prepare to receive Done interrupt */
- snd_sof_dsp_update_bits64_unlocked(sdev, DSP_BAR, SHIM_IMRX,
- SHIM_IMRX_DONE, 0);
- /* send the message */
- sof_mailbox_write(sdev, sdev->host_box.offset, msg->msg_data,
- msg->msg_size);
- snd_sof_dsp_write64(sdev, DSP_BAR, SHIM_IPCX, SHIM_BYT_IPCX_BUSY);
- return 0;
- }
- EXPORT_SYMBOL_NS(atom_send_msg, SND_SOC_SOF_INTEL_ATOM_HIFI_EP);
- int atom_get_mailbox_offset(struct snd_sof_dev *sdev)
- {
- return MBOX_OFFSET;
- }
- EXPORT_SYMBOL_NS(atom_get_mailbox_offset, SND_SOC_SOF_INTEL_ATOM_HIFI_EP);
- int atom_get_window_offset(struct snd_sof_dev *sdev, u32 id)
- {
- return MBOX_OFFSET;
- }
- EXPORT_SYMBOL_NS(atom_get_window_offset, SND_SOC_SOF_INTEL_ATOM_HIFI_EP);
- static void atom_host_done(struct snd_sof_dev *sdev)
- {
- /* clear BUSY bit and set DONE bit - accept new messages */
- snd_sof_dsp_update_bits64_unlocked(sdev, DSP_BAR, SHIM_IPCD,
- SHIM_BYT_IPCD_BUSY |
- SHIM_BYT_IPCD_DONE,
- SHIM_BYT_IPCD_DONE);
- /* unmask and prepare to receive next new message */
- snd_sof_dsp_update_bits64_unlocked(sdev, DSP_BAR, SHIM_IMRX,
- SHIM_IMRX_BUSY, 0);
- }
- static void atom_dsp_done(struct snd_sof_dev *sdev)
- {
- /* clear DONE bit - tell DSP we have completed */
- snd_sof_dsp_update_bits64_unlocked(sdev, DSP_BAR, SHIM_IPCX,
- SHIM_BYT_IPCX_DONE, 0);
- }
- /*
- * DSP control.
- */
- int atom_run(struct snd_sof_dev *sdev)
- {
- int tries = 10;
- /* release stall and wait to unstall */
- snd_sof_dsp_update_bits64(sdev, DSP_BAR, SHIM_CSR,
- SHIM_BYT_CSR_STALL, 0x0);
- while (tries--) {
- if (!(snd_sof_dsp_read64(sdev, DSP_BAR, SHIM_CSR) &
- SHIM_BYT_CSR_PWAITMODE))
- break;
- msleep(100);
- }
- if (tries < 0)
- return -ENODEV;
- /* return init core mask */
- return 1;
- }
- EXPORT_SYMBOL_NS(atom_run, SND_SOC_SOF_INTEL_ATOM_HIFI_EP);
- int atom_reset(struct snd_sof_dev *sdev)
- {
- /* put DSP into reset, set reset vector and stall */
- snd_sof_dsp_update_bits64(sdev, DSP_BAR, SHIM_CSR,
- SHIM_BYT_CSR_RST | SHIM_BYT_CSR_VECTOR_SEL |
- SHIM_BYT_CSR_STALL,
- SHIM_BYT_CSR_RST | SHIM_BYT_CSR_VECTOR_SEL |
- SHIM_BYT_CSR_STALL);
- usleep_range(10, 15);
- /* take DSP out of reset and keep stalled for FW loading */
- snd_sof_dsp_update_bits64(sdev, DSP_BAR, SHIM_CSR,
- SHIM_BYT_CSR_RST, 0);
- return 0;
- }
- EXPORT_SYMBOL_NS(atom_reset, SND_SOC_SOF_INTEL_ATOM_HIFI_EP);
- static const char *fixup_tplg_name(struct snd_sof_dev *sdev,
- const char *sof_tplg_filename,
- const char *ssp_str)
- {
- const char *tplg_filename = NULL;
- const char *split_ext;
- char *filename, *tmp;
- filename = kstrdup(sof_tplg_filename, GFP_KERNEL);
- if (!filename)
- return NULL;
- /* this assumes a .tplg extension */
- tmp = filename;
- split_ext = strsep(&tmp, ".");
- if (split_ext)
- tplg_filename = devm_kasprintf(sdev->dev, GFP_KERNEL,
- "%s-%s.tplg",
- split_ext, ssp_str);
- kfree(filename);
- return tplg_filename;
- }
- struct snd_soc_acpi_mach *atom_machine_select(struct snd_sof_dev *sdev)
- {
- struct snd_sof_pdata *sof_pdata = sdev->pdata;
- const struct sof_dev_desc *desc = sof_pdata->desc;
- struct snd_soc_acpi_mach *mach;
- struct platform_device *pdev;
- const char *tplg_filename;
- mach = snd_soc_acpi_find_machine(desc->machines);
- if (!mach) {
- dev_warn(sdev->dev, "warning: No matching ASoC machine driver found\n");
- return NULL;
- }
- pdev = to_platform_device(sdev->dev);
- if (soc_intel_is_byt_cr(pdev)) {
- dev_dbg(sdev->dev,
- "BYT-CR detected, SSP0 used instead of SSP2\n");
- tplg_filename = fixup_tplg_name(sdev,
- mach->sof_tplg_filename,
- "ssp0");
- } else {
- tplg_filename = mach->sof_tplg_filename;
- }
- if (!tplg_filename) {
- dev_dbg(sdev->dev,
- "error: no topology filename\n");
- return NULL;
- }
- sof_pdata->tplg_filename = tplg_filename;
- mach->mach_params.acpi_ipc_irq_index = desc->irqindex_host_ipc;
- return mach;
- }
- EXPORT_SYMBOL_NS(atom_machine_select, SND_SOC_SOF_INTEL_ATOM_HIFI_EP);
- /* Atom DAIs */
- struct snd_soc_dai_driver atom_dai[] = {
- {
- .name = "ssp0-port",
- .playback = {
- .channels_min = 1,
- .channels_max = 8,
- },
- .capture = {
- .channels_min = 1,
- .channels_max = 8,
- },
- },
- {
- .name = "ssp1-port",
- .playback = {
- .channels_min = 1,
- .channels_max = 8,
- },
- .capture = {
- .channels_min = 1,
- .channels_max = 8,
- },
- },
- {
- .name = "ssp2-port",
- .playback = {
- .channels_min = 1,
- .channels_max = 8,
- },
- .capture = {
- .channels_min = 1,
- .channels_max = 8,
- }
- },
- {
- .name = "ssp3-port",
- .playback = {
- .channels_min = 1,
- .channels_max = 8,
- },
- .capture = {
- .channels_min = 1,
- .channels_max = 8,
- },
- },
- {
- .name = "ssp4-port",
- .playback = {
- .channels_min = 1,
- .channels_max = 8,
- },
- .capture = {
- .channels_min = 1,
- .channels_max = 8,
- },
- },
- {
- .name = "ssp5-port",
- .playback = {
- .channels_min = 1,
- .channels_max = 8,
- },
- .capture = {
- .channels_min = 1,
- .channels_max = 8,
- },
- },
- };
- EXPORT_SYMBOL_NS(atom_dai, SND_SOC_SOF_INTEL_ATOM_HIFI_EP);
- void atom_set_mach_params(struct snd_soc_acpi_mach *mach,
- struct snd_sof_dev *sdev)
- {
- struct snd_sof_pdata *pdata = sdev->pdata;
- const struct sof_dev_desc *desc = pdata->desc;
- struct snd_soc_acpi_mach_params *mach_params;
- mach_params = &mach->mach_params;
- mach_params->platform = dev_name(sdev->dev);
- mach_params->num_dai_drivers = desc->ops->num_drv;
- mach_params->dai_drivers = desc->ops->drv;
- }
- EXPORT_SYMBOL_NS(atom_set_mach_params, SND_SOC_SOF_INTEL_ATOM_HIFI_EP);
- MODULE_LICENSE("Dual BSD/GPL");
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