--- /dev/null
+// 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) {
+ dev_err(hda->dev, "failed to get the irq, err = %d\n", irq_id);
+ 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 = {
+ SET_SYSTEM_SLEEP_PM_OPS(cix_ipbloq_hda_suspend,
+ cix_ipbloq_hda_resume)
+ SET_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 = &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>");
projects / thirdparty / kernel / linux.git / commitdiff
