| // SPDX-License-Identifier: GPL-2.0 |
| // Copyright 2025 Cix Technology Group Co., Ltd. |
| |
| #include <linux/clk.h> |
| #include <linux/interrupt.h> |
| #include <linux/io.h> |
| #include <linux/kernel.h> |
| #include <linux/module.h> |
| #include <linux/mutex.h> |
| #include <linux/of.h> |
| #include <linux/of_reserved_mem.h> |
| #include <linux/platform_device.h> |
| #include <linux/pm_runtime.h> |
| #include <linux/reset.h> |
| #include <linux/string.h> |
| |
| #include <sound/hda_codec.h> |
| #include "hda_controller.h" |
| |
| #define CIX_IPBLOQ_JACKPOLL_DEFAULT_TIME_MS 1000 |
| #define CIX_IPBLOQ_POWER_SAVE_DEFAULT_TIME_MS 100 |
| |
| #define CIX_IPBLOQ_SKY1_ADDR_HOST_TO_HDAC_OFFSET (-0x90000000ULL) |
| |
| struct cix_ipbloq_hda { |
| struct azx chip; |
| struct device *dev; |
| void __iomem *regs; |
| |
| struct reset_control *reset; |
| struct clk_bulk_data clocks[2]; |
| unsigned int nclocks; |
| }; |
| |
| static const struct hda_controller_ops cix_ipbloq_hda_ops; |
| |
| static int cix_ipbloq_hda_dev_disconnect(struct snd_device *device) |
| { |
| struct azx *chip = device->device_data; |
| |
| chip->bus.shutdown = 1; |
| |
| return 0; |
| } |
| |
| static int cix_ipbloq_hda_dev_free(struct snd_device *device) |
| { |
| struct azx *chip = device->device_data; |
| |
| if (azx_bus(chip)->chip_init) { |
| azx_stop_all_streams(chip); |
| azx_stop_chip(chip); |
| } |
| |
| azx_free_stream_pages(chip); |
| azx_free_streams(chip); |
| snd_hdac_bus_exit(azx_bus(chip)); |
| |
| return 0; |
| } |
| |
| static int cix_ipbloq_hda_probe_codec(struct cix_ipbloq_hda *hda) |
| { |
| struct azx *chip = &hda->chip; |
| struct hdac_bus *bus = azx_bus(chip); |
| int err; |
| |
| to_hda_bus(bus)->bus_probing = 1; |
| |
| /* create codec instances */ |
| err = azx_probe_codecs(chip, 8); |
| if (err < 0) { |
| dev_err(hda->dev, "probe codecs failed: %d\n", err); |
| return err; |
| } |
| |
| err = azx_codec_configure(chip); |
| if (err < 0) { |
| dev_err(hda->dev, "codec configure failed: %d\n", err); |
| return err; |
| } |
| |
| err = snd_card_register(chip->card); |
| if (err < 0) { |
| dev_err(hda->dev, "card register failed: %d\n", err); |
| return err; |
| } |
| |
| chip->running = 1; |
| |
| to_hda_bus(bus)->bus_probing = 0; |
| |
| snd_hda_set_power_save(&chip->bus, CIX_IPBLOQ_POWER_SAVE_DEFAULT_TIME_MS); |
| |
| return 0; |
| } |
| |
| static int cix_ipbloq_hda_init(struct cix_ipbloq_hda *hda, |
| struct azx *chip, |
| struct platform_device *pdev) |
| { |
| const char *sname = NULL, *drv_name = "cix-ipbloq-hda"; |
| struct hdac_bus *bus = azx_bus(chip); |
| struct snd_card *card = chip->card; |
| struct resource *res; |
| unsigned short gcap; |
| int irq_id, err; |
| |
| hda->regs = devm_platform_get_and_ioremap_resource(pdev, 0, &res); |
| if (IS_ERR(hda->regs)) { |
| dev_err(hda->dev, "failed to get and ioremap resource\n"); |
| return PTR_ERR(hda->regs); |
| } |
| bus->remap_addr = hda->regs; |
| bus->addr = res->start; |
| |
| irq_id = platform_get_irq(pdev, 0); |
| if (irq_id < 0) |
| return irq_id; |
| |
| err = devm_request_irq(hda->dev, irq_id, azx_interrupt, |
| 0, KBUILD_MODNAME, chip); |
| if (err < 0) |
| return dev_err_probe(hda->dev, err, |
| "unable to request IRQ %d : err = %d\n", irq_id, err); |
| bus->irq = irq_id; |
| card->sync_irq = bus->irq; |
| |
| gcap = azx_readw(chip, GCAP); |
| chip->capture_streams = (gcap >> 8) & 0x0f; |
| chip->playback_streams = (gcap >> 12) & 0x0f; |
| chip->capture_index_offset = 0; |
| chip->playback_index_offset = chip->capture_streams; |
| chip->num_streams = chip->playback_streams + chip->capture_streams; |
| |
| /* initialize streams */ |
| err = azx_init_streams(chip); |
| if (err < 0) { |
| dev_err(hda->dev, "failed to initialize streams: %d\n", err); |
| return err; |
| } |
| |
| err = azx_alloc_stream_pages(chip); |
| if (err < 0) { |
| dev_err(hda->dev, "failed to allocate stream pages: %d\n", err); |
| return err; |
| } |
| |
| /* initialize chip */ |
| azx_init_chip(chip, 1); |
| |
| /* codec detection */ |
| if (!bus->codec_mask) { |
| dev_err(hda->dev, "no codecs found\n"); |
| return -ENODEV; |
| } |
| dev_dbg(card->dev, "codec detection mask = 0x%lx\n", bus->codec_mask); |
| |
| /* driver name */ |
| strscpy(card->driver, drv_name, sizeof(card->driver)); |
| |
| /* shortname for card */ |
| sname = of_get_property(pdev->dev.of_node, "model", NULL); |
| if (!sname) |
| sname = drv_name; |
| if (strlen(sname) > sizeof(card->shortname)) |
| dev_dbg(card->dev, "truncating shortname for card\n"); |
| strscpy(card->shortname, sname, sizeof(card->shortname)); |
| |
| /* longname for card */ |
| snprintf(card->longname, sizeof(card->longname), |
| "%s at 0x%lx irq %i", |
| card->shortname, bus->addr, bus->irq); |
| |
| return 0; |
| } |
| |
| static int cix_ipbloq_hda_create(struct cix_ipbloq_hda *hda, |
| struct snd_card *card, |
| unsigned int driver_caps) |
| { |
| static const struct snd_device_ops ops = { |
| .dev_disconnect = cix_ipbloq_hda_dev_disconnect, |
| .dev_free = cix_ipbloq_hda_dev_free, |
| }; |
| struct azx *chip; |
| int err; |
| |
| chip = &hda->chip; |
| chip->card = card; |
| chip->ops = &cix_ipbloq_hda_ops; |
| chip->driver_caps = driver_caps; |
| chip->driver_type = driver_caps & 0xff; |
| chip->dev_index = 0; |
| chip->single_cmd = 0; |
| chip->codec_probe_mask = -1; |
| chip->align_buffer_size = 1; |
| chip->jackpoll_interval = msecs_to_jiffies(CIX_IPBLOQ_JACKPOLL_DEFAULT_TIME_MS); |
| mutex_init(&chip->open_mutex); |
| INIT_LIST_HEAD(&chip->pcm_list); |
| |
| /* |
| * HD-audio controllers appear pretty inaccurate about the update-IRQ timing. |
| * The IRQ is issued before actually the data is processed. So use stream |
| * link position by default instead of dma position buffer. |
| */ |
| chip->get_position[0] = chip->get_position[1] = azx_get_pos_lpib; |
| |
| err = azx_bus_init(chip, NULL); |
| if (err < 0) { |
| dev_err(hda->dev, "failed to init bus, err = %d\n", err); |
| return err; |
| } |
| |
| /* RIRBSTS.RINTFL cannot be cleared, cause interrupt storm */ |
| chip->bus.core.polling_mode = 1; |
| chip->bus.core.not_use_interrupts = 1; |
| |
| chip->bus.core.aligned_mmio = 1; |
| chip->bus.core.dma_stop_delay = 100; |
| chip->bus.core.addr_offset = (dma_addr_t)CIX_IPBLOQ_SKY1_ADDR_HOST_TO_HDAC_OFFSET; |
| |
| chip->bus.jackpoll_in_suspend = 1; |
| |
| err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops); |
| if (err < 0) { |
| dev_err(card->dev, "failed to create device, err = %d\n", err); |
| return err; |
| } |
| |
| return 0; |
| } |
| |
| static int cix_ipbloq_hda_probe(struct platform_device *pdev) |
| { |
| const unsigned int driver_flags = AZX_DCAPS_PM_RUNTIME; |
| struct cix_ipbloq_hda *hda; |
| struct snd_card *card; |
| struct azx *chip; |
| int err; |
| |
| hda = devm_kzalloc(&pdev->dev, sizeof(*hda), GFP_KERNEL); |
| if (!hda) |
| return -ENOMEM; |
| hda->dev = &pdev->dev; |
| |
| hda->reset = devm_reset_control_get(hda->dev, NULL); |
| if (IS_ERR(hda->reset)) |
| return dev_err_probe(hda->dev, PTR_ERR(hda->reset), |
| "failed to get reset, err = %ld\n", PTR_ERR(hda->reset)); |
| |
| hda->clocks[hda->nclocks++].id = "ipg"; |
| hda->clocks[hda->nclocks++].id = "per"; |
| err = devm_clk_bulk_get(hda->dev, hda->nclocks, hda->clocks); |
| if (err < 0) |
| return dev_err_probe(hda->dev, err, "failed to get clk, err = %d\n", err); |
| |
| dma_set_mask_and_coherent(hda->dev, DMA_BIT_MASK(32)); |
| |
| err = of_reserved_mem_device_init(hda->dev); |
| if (err < 0 && err != -ENODEV) { |
| dev_err(hda->dev, |
| "failed to init reserved mem for DMA, err = %d\n", err); |
| return err; |
| } |
| |
| err = snd_card_new(hda->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1, |
| THIS_MODULE, 0, &card); |
| if (err < 0) |
| return dev_err_probe(hda->dev, err, "failed to crate card, err = %d\n", err); |
| |
| err = cix_ipbloq_hda_create(hda, card, driver_flags); |
| if (err < 0) |
| goto out_free_card; |
| |
| chip = &hda->chip; |
| card->private_data = chip; |
| dev_set_drvdata(hda->dev, card); |
| |
| pm_runtime_enable(hda->dev); |
| if (!azx_has_pm_runtime(chip)) |
| pm_runtime_forbid(hda->dev); |
| |
| err = pm_runtime_resume_and_get(hda->dev); |
| if (err < 0) { |
| dev_err(hda->dev, "runtime resume and get failed, err = %d\n", err); |
| goto out_free_device; |
| } |
| |
| err = cix_ipbloq_hda_init(hda, chip, pdev); |
| if (err < 0) |
| goto out_free_device; |
| |
| err = cix_ipbloq_hda_probe_codec(hda); |
| if (err < 0) |
| goto out_free_device; |
| |
| pm_runtime_put(hda->dev); |
| |
| return 0; |
| |
| out_free_device: |
| snd_device_free(card, chip); |
| out_free_card: |
| snd_card_free(card); |
| |
| return err; |
| } |
| |
| static void cix_ipbloq_hda_remove(struct platform_device *pdev) |
| { |
| struct snd_card *card = dev_get_drvdata(&pdev->dev); |
| struct azx *chip = card->private_data; |
| |
| snd_device_free(card, chip); |
| snd_card_free(card); |
| |
| pm_runtime_disable(&pdev->dev); |
| } |
| |
| static void cix_ipbloq_hda_shutdown(struct platform_device *pdev) |
| { |
| struct snd_card *card = dev_get_drvdata(&pdev->dev); |
| struct azx *chip; |
| |
| if (!card) |
| return; |
| |
| chip = card->private_data; |
| if (chip && chip->running) |
| azx_stop_chip(chip); |
| } |
| |
| static int cix_ipbloq_hda_suspend(struct device *dev) |
| { |
| struct snd_card *card = dev_get_drvdata(dev); |
| int rc; |
| |
| rc = pm_runtime_force_suspend(dev); |
| if (rc < 0) |
| return rc; |
| snd_power_change_state(card, SNDRV_CTL_POWER_D3cold); |
| |
| return 0; |
| } |
| |
| static int cix_ipbloq_hda_resume(struct device *dev) |
| { |
| struct snd_card *card = dev_get_drvdata(dev); |
| int rc; |
| |
| rc = pm_runtime_force_resume(dev); |
| if (rc < 0) |
| return rc; |
| snd_power_change_state(card, SNDRV_CTL_POWER_D0); |
| |
| return 0; |
| } |
| |
| static int cix_ipbloq_hda_runtime_suspend(struct device *dev) |
| { |
| struct snd_card *card = dev_get_drvdata(dev); |
| struct azx *chip = card->private_data; |
| struct cix_ipbloq_hda *hda = container_of(chip, struct cix_ipbloq_hda, chip); |
| |
| if (chip && chip->running) { |
| azx_stop_chip(chip); |
| azx_enter_link_reset(chip); |
| } |
| |
| clk_bulk_disable_unprepare(hda->nclocks, hda->clocks); |
| |
| return 0; |
| } |
| |
| static int cix_ipbloq_hda_runtime_resume(struct device *dev) |
| { |
| struct snd_card *card = dev_get_drvdata(dev); |
| struct azx *chip = card->private_data; |
| struct cix_ipbloq_hda *hda = container_of(chip, struct cix_ipbloq_hda, chip); |
| int rc; |
| |
| rc = clk_bulk_prepare_enable(hda->nclocks, hda->clocks); |
| if (rc) { |
| dev_err(dev, "failed to enable clk bulk, rc: %d\n", rc); |
| return rc; |
| } |
| |
| rc = reset_control_assert(hda->reset); |
| if (rc) { |
| dev_err(dev, "failed to assert reset, rc: %d\n", rc); |
| return rc; |
| } |
| |
| rc = reset_control_deassert(hda->reset); |
| if (rc) { |
| dev_err(dev, "failed to deassert reset, rc: %d\n", rc); |
| return rc; |
| } |
| |
| if (chip && chip->running) |
| azx_init_chip(chip, 1); |
| |
| return 0; |
| } |
| |
| static const struct dev_pm_ops cix_ipbloq_hda_pm = { |
| SYSTEM_SLEEP_PM_OPS(cix_ipbloq_hda_suspend, |
| cix_ipbloq_hda_resume) |
| RUNTIME_PM_OPS(cix_ipbloq_hda_runtime_suspend, |
| cix_ipbloq_hda_runtime_resume, NULL) |
| }; |
| |
| static const struct of_device_id cix_ipbloq_hda_match[] = { |
| { .compatible = "cix,sky1-ipbloq-hda" }, |
| { /* sentinel */ }, |
| }; |
| MODULE_DEVICE_TABLE(of, cix_ipbloq_hda_match); |
| |
| static struct platform_driver cix_ipbloq_hda_driver = { |
| .driver = { |
| .name = "cix-ipbloq-hda", |
| .pm = pm_ptr(&cix_ipbloq_hda_pm), |
| .of_match_table = cix_ipbloq_hda_match, |
| }, |
| .probe = cix_ipbloq_hda_probe, |
| .remove = cix_ipbloq_hda_remove, |
| .shutdown = cix_ipbloq_hda_shutdown, |
| }; |
| module_platform_driver(cix_ipbloq_hda_driver); |
| |
| MODULE_LICENSE("GPL"); |
| MODULE_DESCRIPTION("CIX IPBLOQ HDA bus driver"); |
| MODULE_AUTHOR("Joakim Zhang <joakim.zhang@cixtech.com>"); |