#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;
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;
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;
}
azx_init_chip(chip, 1);
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);
strscpy(card->driver, drv_name, sizeof(card->driver));
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));
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);
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;
}
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" },
{ },
};
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>");
