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1// SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)2//3// This file is provided under a dual BSD/GPLv2 license. When using or4// redistributing this file, you may do so under either license.5//6// Copyright(c) 2018-2021 Intel Corporation7//8// Author: Liam Girdwood <liam.r.girdwood@linux.intel.com>9//10 11/*12 * Hardware interface for audio DSP on Atom devices13 */14 15#include <linux/module.h>16#include <sound/sof.h>17#include <sound/sof/xtensa.h>18#include <sound/soc-acpi.h>19#include <sound/soc-acpi-intel-match.h>20#include <sound/intel-dsp-config.h>21#include "../ops.h"22#include "shim.h"23#include "atom.h"24#include "../sof-acpi-dev.h"25#include "../sof-audio.h"26#include "../../intel/common/soc-intel-quirks.h"27 28static void atom_host_done(struct snd_sof_dev *sdev);29static void atom_dsp_done(struct snd_sof_dev *sdev);30 31/*32 * Debug33 */34 35static void atom_get_registers(struct snd_sof_dev *sdev,36 struct sof_ipc_dsp_oops_xtensa *xoops,37 struct sof_ipc_panic_info *panic_info,38 u32 *stack, size_t stack_words)39{40 u32 offset = sdev->dsp_oops_offset;41 42 /* first read regsisters */43 sof_mailbox_read(sdev, offset, xoops, sizeof(*xoops));44 45 /* note: variable AR register array is not read */46 47 /* then get panic info */48 if (xoops->arch_hdr.totalsize > EXCEPT_MAX_HDR_SIZE) {49 dev_err(sdev->dev, "invalid header size 0x%x. FW oops is bogus\n",50 xoops->arch_hdr.totalsize);51 return;52 }53 offset += xoops->arch_hdr.totalsize;54 sof_mailbox_read(sdev, offset, panic_info, sizeof(*panic_info));55 56 /* then get the stack */57 offset += sizeof(*panic_info);58 sof_mailbox_read(sdev, offset, stack, stack_words * sizeof(u32));59}60 61void atom_dump(struct snd_sof_dev *sdev, u32 flags)62{63 struct sof_ipc_dsp_oops_xtensa xoops;64 struct sof_ipc_panic_info panic_info;65 u32 stack[STACK_DUMP_SIZE];66 u64 status, panic, imrd, imrx;67 68 /* now try generic SOF status messages */69 status = snd_sof_dsp_read64(sdev, DSP_BAR, SHIM_IPCD);70 panic = snd_sof_dsp_read64(sdev, DSP_BAR, SHIM_IPCX);71 atom_get_registers(sdev, &xoops, &panic_info, stack,72 STACK_DUMP_SIZE);73 sof_print_oops_and_stack(sdev, KERN_ERR, status, panic, &xoops,74 &panic_info, stack, STACK_DUMP_SIZE);75 76 /* provide some context for firmware debug */77 imrx = snd_sof_dsp_read64(sdev, DSP_BAR, SHIM_IMRX);78 imrd = snd_sof_dsp_read64(sdev, DSP_BAR, SHIM_IMRD);79 dev_err(sdev->dev,80 "error: ipc host -> DSP: pending %s complete %s raw 0x%llx\n",81 (panic & SHIM_IPCX_BUSY) ? "yes" : "no",82 (panic & SHIM_IPCX_DONE) ? "yes" : "no", panic);83 dev_err(sdev->dev,84 "error: mask host: pending %s complete %s raw 0x%llx\n",85 (imrx & SHIM_IMRX_BUSY) ? "yes" : "no",86 (imrx & SHIM_IMRX_DONE) ? "yes" : "no", imrx);87 dev_err(sdev->dev,88 "error: ipc DSP -> host: pending %s complete %s raw 0x%llx\n",89 (status & SHIM_IPCD_BUSY) ? "yes" : "no",90 (status & SHIM_IPCD_DONE) ? "yes" : "no", status);91 dev_err(sdev->dev,92 "error: mask DSP: pending %s complete %s raw 0x%llx\n",93 (imrd & SHIM_IMRD_BUSY) ? "yes" : "no",94 (imrd & SHIM_IMRD_DONE) ? "yes" : "no", imrd);95 96}97EXPORT_SYMBOL_NS(atom_dump, SND_SOC_SOF_INTEL_ATOM_HIFI_EP);98 99/*100 * IPC Doorbell IRQ handler and thread.101 */102 103irqreturn_t atom_irq_handler(int irq, void *context)104{105 struct snd_sof_dev *sdev = context;106 u64 ipcx, ipcd;107 int ret = IRQ_NONE;108 109 ipcx = snd_sof_dsp_read64(sdev, DSP_BAR, SHIM_IPCX);110 ipcd = snd_sof_dsp_read64(sdev, DSP_BAR, SHIM_IPCD);111 112 if (ipcx & SHIM_BYT_IPCX_DONE) {113 114 /* reply message from DSP, Mask Done interrupt first */115 snd_sof_dsp_update_bits64_unlocked(sdev, DSP_BAR,116 SHIM_IMRX,117 SHIM_IMRX_DONE,118 SHIM_IMRX_DONE);119 ret = IRQ_WAKE_THREAD;120 }121 122 if (ipcd & SHIM_BYT_IPCD_BUSY) {123 124 /* new message from DSP, Mask Busy interrupt first */125 snd_sof_dsp_update_bits64_unlocked(sdev, DSP_BAR,126 SHIM_IMRX,127 SHIM_IMRX_BUSY,128 SHIM_IMRX_BUSY);129 ret = IRQ_WAKE_THREAD;130 }131 132 return ret;133}134EXPORT_SYMBOL_NS(atom_irq_handler, SND_SOC_SOF_INTEL_ATOM_HIFI_EP);135 136irqreturn_t atom_irq_thread(int irq, void *context)137{138 struct snd_sof_dev *sdev = context;139 u64 ipcx, ipcd;140 141 ipcx = snd_sof_dsp_read64(sdev, DSP_BAR, SHIM_IPCX);142 ipcd = snd_sof_dsp_read64(sdev, DSP_BAR, SHIM_IPCD);143 144 /* reply message from DSP */145 if (ipcx & SHIM_BYT_IPCX_DONE) {146 147 spin_lock_irq(&sdev->ipc_lock);148 149 /*150 * handle immediate reply from DSP core. If the msg is151 * found, set done bit in cmd_done which is called at the152 * end of message processing function, else set it here153 * because the done bit can't be set in cmd_done function154 * which is triggered by msg155 */156 snd_sof_ipc_process_reply(sdev, ipcx);157 158 atom_dsp_done(sdev);159 160 spin_unlock_irq(&sdev->ipc_lock);161 }162 163 /* new message from DSP */164 if (ipcd & SHIM_BYT_IPCD_BUSY) {165 166 /* Handle messages from DSP Core */167 if ((ipcd & SOF_IPC_PANIC_MAGIC_MASK) == SOF_IPC_PANIC_MAGIC) {168 snd_sof_dsp_panic(sdev, PANIC_OFFSET(ipcd) + MBOX_OFFSET,169 true);170 } else {171 snd_sof_ipc_msgs_rx(sdev);172 }173 174 atom_host_done(sdev);175 }176 177 return IRQ_HANDLED;178}179EXPORT_SYMBOL_NS(atom_irq_thread, SND_SOC_SOF_INTEL_ATOM_HIFI_EP);180 181int atom_send_msg(struct snd_sof_dev *sdev, struct snd_sof_ipc_msg *msg)182{183 /* unmask and prepare to receive Done interrupt */184 snd_sof_dsp_update_bits64_unlocked(sdev, DSP_BAR, SHIM_IMRX,185 SHIM_IMRX_DONE, 0);186 187 /* send the message */188 sof_mailbox_write(sdev, sdev->host_box.offset, msg->msg_data,189 msg->msg_size);190 snd_sof_dsp_write64(sdev, DSP_BAR, SHIM_IPCX, SHIM_BYT_IPCX_BUSY);191 192 return 0;193}194EXPORT_SYMBOL_NS(atom_send_msg, SND_SOC_SOF_INTEL_ATOM_HIFI_EP);195 196int atom_get_mailbox_offset(struct snd_sof_dev *sdev)197{198 return MBOX_OFFSET;199}200EXPORT_SYMBOL_NS(atom_get_mailbox_offset, SND_SOC_SOF_INTEL_ATOM_HIFI_EP);201 202int atom_get_window_offset(struct snd_sof_dev *sdev, u32 id)203{204 return MBOX_OFFSET;205}206EXPORT_SYMBOL_NS(atom_get_window_offset, SND_SOC_SOF_INTEL_ATOM_HIFI_EP);207 208static void atom_host_done(struct snd_sof_dev *sdev)209{210 /* clear BUSY bit and set DONE bit - accept new messages */211 snd_sof_dsp_update_bits64_unlocked(sdev, DSP_BAR, SHIM_IPCD,212 SHIM_BYT_IPCD_BUSY |213 SHIM_BYT_IPCD_DONE,214 SHIM_BYT_IPCD_DONE);215 216 /* unmask and prepare to receive next new message */217 snd_sof_dsp_update_bits64_unlocked(sdev, DSP_BAR, SHIM_IMRX,218 SHIM_IMRX_BUSY, 0);219}220 221static void atom_dsp_done(struct snd_sof_dev *sdev)222{223 /* clear DONE bit - tell DSP we have completed */224 snd_sof_dsp_update_bits64_unlocked(sdev, DSP_BAR, SHIM_IPCX,225 SHIM_BYT_IPCX_DONE, 0);226}227 228/*229 * DSP control.230 */231 232int atom_run(struct snd_sof_dev *sdev)233{234 int tries = 10;235 236 /* release stall and wait to unstall */237 snd_sof_dsp_update_bits64(sdev, DSP_BAR, SHIM_CSR,238 SHIM_BYT_CSR_STALL, 0x0);239 while (tries--) {240 if (!(snd_sof_dsp_read64(sdev, DSP_BAR, SHIM_CSR) &241 SHIM_BYT_CSR_PWAITMODE))242 break;243 msleep(100);244 }245 if (tries < 0)246 return -ENODEV;247 248 /* return init core mask */249 return 1;250}251EXPORT_SYMBOL_NS(atom_run, SND_SOC_SOF_INTEL_ATOM_HIFI_EP);252 253int atom_reset(struct snd_sof_dev *sdev)254{255 /* put DSP into reset, set reset vector and stall */256 snd_sof_dsp_update_bits64(sdev, DSP_BAR, SHIM_CSR,257 SHIM_BYT_CSR_RST | SHIM_BYT_CSR_VECTOR_SEL |258 SHIM_BYT_CSR_STALL,259 SHIM_BYT_CSR_RST | SHIM_BYT_CSR_VECTOR_SEL |260 SHIM_BYT_CSR_STALL);261 262 usleep_range(10, 15);263 264 /* take DSP out of reset and keep stalled for FW loading */265 snd_sof_dsp_update_bits64(sdev, DSP_BAR, SHIM_CSR,266 SHIM_BYT_CSR_RST, 0);267 268 return 0;269}270EXPORT_SYMBOL_NS(atom_reset, SND_SOC_SOF_INTEL_ATOM_HIFI_EP);271 272static const char *fixup_tplg_name(struct snd_sof_dev *sdev,273 const char *sof_tplg_filename,274 const char *ssp_str)275{276 const char *tplg_filename = NULL;277 const char *split_ext;278 char *filename, *tmp;279 280 filename = kstrdup(sof_tplg_filename, GFP_KERNEL);281 if (!filename)282 return NULL;283 284 /* this assumes a .tplg extension */285 tmp = filename;286 split_ext = strsep(&tmp, ".");287 if (split_ext)288 tplg_filename = devm_kasprintf(sdev->dev, GFP_KERNEL,289 "%s-%s.tplg",290 split_ext, ssp_str);291 kfree(filename);292 293 return tplg_filename;294}295 296struct snd_soc_acpi_mach *atom_machine_select(struct snd_sof_dev *sdev)297{298 struct snd_sof_pdata *sof_pdata = sdev->pdata;299 const struct sof_dev_desc *desc = sof_pdata->desc;300 struct snd_soc_acpi_mach *mach;301 struct platform_device *pdev;302 const char *tplg_filename;303 304 mach = snd_soc_acpi_find_machine(desc->machines);305 if (!mach) {306 dev_warn(sdev->dev, "warning: No matching ASoC machine driver found\n");307 return NULL;308 }309 310 pdev = to_platform_device(sdev->dev);311 if (soc_intel_is_byt_cr(pdev)) {312 dev_dbg(sdev->dev,313 "BYT-CR detected, SSP0 used instead of SSP2\n");314 315 tplg_filename = fixup_tplg_name(sdev,316 mach->sof_tplg_filename,317 "ssp0");318 } else {319 tplg_filename = mach->sof_tplg_filename;320 }321 322 if (!tplg_filename) {323 dev_dbg(sdev->dev,324 "error: no topology filename\n");325 return NULL;326 }327 328 sof_pdata->tplg_filename = tplg_filename;329 mach->mach_params.acpi_ipc_irq_index = desc->irqindex_host_ipc;330 331 return mach;332}333EXPORT_SYMBOL_NS(atom_machine_select, SND_SOC_SOF_INTEL_ATOM_HIFI_EP);334 335/* Atom DAIs */336struct snd_soc_dai_driver atom_dai[] = {337{338 .name = "ssp0-port",339 .playback = {340 .channels_min = 1,341 .channels_max = 8,342 },343 .capture = {344 .channels_min = 1,345 .channels_max = 8,346 },347},348{349 .name = "ssp1-port",350 .playback = {351 .channels_min = 1,352 .channels_max = 8,353 },354 .capture = {355 .channels_min = 1,356 .channels_max = 8,357 },358},359{360 .name = "ssp2-port",361 .playback = {362 .channels_min = 1,363 .channels_max = 8,364 },365 .capture = {366 .channels_min = 1,367 .channels_max = 8,368 }369},370{371 .name = "ssp3-port",372 .playback = {373 .channels_min = 1,374 .channels_max = 8,375 },376 .capture = {377 .channels_min = 1,378 .channels_max = 8,379 },380},381{382 .name = "ssp4-port",383 .playback = {384 .channels_min = 1,385 .channels_max = 8,386 },387 .capture = {388 .channels_min = 1,389 .channels_max = 8,390 },391},392{393 .name = "ssp5-port",394 .playback = {395 .channels_min = 1,396 .channels_max = 8,397 },398 .capture = {399 .channels_min = 1,400 .channels_max = 8,401 },402},403};404EXPORT_SYMBOL_NS(atom_dai, SND_SOC_SOF_INTEL_ATOM_HIFI_EP);405 406void atom_set_mach_params(struct snd_soc_acpi_mach *mach,407 struct snd_sof_dev *sdev)408{409 struct snd_sof_pdata *pdata = sdev->pdata;410 const struct sof_dev_desc *desc = pdata->desc;411 struct snd_soc_acpi_mach_params *mach_params;412 413 mach_params = &mach->mach_params;414 mach_params->platform = dev_name(sdev->dev);415 mach_params->num_dai_drivers = desc->ops->num_drv;416 mach_params->dai_drivers = desc->ops->drv;417}418EXPORT_SYMBOL_NS(atom_set_mach_params, SND_SOC_SOF_INTEL_ATOM_HIFI_EP);419 420MODULE_LICENSE("Dual BSD/GPL");421MODULE_DESCRIPTION("SOF support for Atom platforms");422