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-rw-r--r--sound/soc/amd/yc/pci-acp6x.c350
1 files changed, 350 insertions, 0 deletions
diff --git a/sound/soc/amd/yc/pci-acp6x.c b/sound/soc/amd/yc/pci-acp6x.c
new file mode 100644
index 0000000000..7af6a349b1
--- /dev/null
+++ b/sound/soc/amd/yc/pci-acp6x.c
@@ -0,0 +1,350 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * AMD Yellow Carp ACP PCI Driver
+ *
+ * Copyright 2021 Advanced Micro Devices, Inc.
+ */
+
+#include <linux/pci.h>
+#include <linux/module.h>
+#include <linux/io.h>
+#include <linux/delay.h>
+#include <linux/platform_device.h>
+#include <linux/interrupt.h>
+#include <sound/pcm_params.h>
+#include <linux/pm_runtime.h>
+
+#include "acp6x.h"
+
+struct acp6x_dev_data {
+ void __iomem *acp6x_base;
+ struct resource *res;
+ bool acp6x_audio_mode;
+ struct platform_device *pdev[ACP6x_DEVS];
+};
+
+static int acp6x_power_on(void __iomem *acp_base)
+{
+ u32 val;
+ int timeout;
+
+ val = acp6x_readl(acp_base + ACP_PGFSM_STATUS);
+
+ if (!val)
+ return val;
+
+ if ((val & ACP_PGFSM_STATUS_MASK) != ACP_POWER_ON_IN_PROGRESS)
+ acp6x_writel(ACP_PGFSM_CNTL_POWER_ON_MASK, acp_base + ACP_PGFSM_CONTROL);
+ timeout = 0;
+ while (++timeout < 500) {
+ val = acp6x_readl(acp_base + ACP_PGFSM_STATUS);
+ if (!val)
+ return 0;
+ udelay(1);
+ }
+ return -ETIMEDOUT;
+}
+
+static int acp6x_reset(void __iomem *acp_base)
+{
+ u32 val;
+ int timeout;
+
+ acp6x_writel(1, acp_base + ACP_SOFT_RESET);
+ timeout = 0;
+ while (++timeout < 500) {
+ val = acp6x_readl(acp_base + ACP_SOFT_RESET);
+ if (val & ACP_SOFT_RESET_SOFTRESET_AUDDONE_MASK)
+ break;
+ cpu_relax();
+ }
+ acp6x_writel(0, acp_base + ACP_SOFT_RESET);
+ timeout = 0;
+ while (++timeout < 500) {
+ val = acp6x_readl(acp_base + ACP_SOFT_RESET);
+ if (!val)
+ return 0;
+ cpu_relax();
+ }
+ return -ETIMEDOUT;
+}
+
+static void acp6x_enable_interrupts(void __iomem *acp_base)
+{
+ acp6x_writel(0x01, acp_base + ACP_EXTERNAL_INTR_ENB);
+}
+
+static void acp6x_disable_interrupts(void __iomem *acp_base)
+{
+ acp6x_writel(ACP_EXT_INTR_STAT_CLEAR_MASK, acp_base +
+ ACP_EXTERNAL_INTR_STAT);
+ acp6x_writel(0x00, acp_base + ACP_EXTERNAL_INTR_CNTL);
+ acp6x_writel(0x00, acp_base + ACP_EXTERNAL_INTR_ENB);
+}
+
+static int acp6x_init(void __iomem *acp_base)
+{
+ int ret;
+
+ /* power on */
+ ret = acp6x_power_on(acp_base);
+ if (ret) {
+ pr_err("ACP power on failed\n");
+ return ret;
+ }
+ acp6x_writel(0x01, acp_base + ACP_CONTROL);
+ /* Reset */
+ ret = acp6x_reset(acp_base);
+ if (ret) {
+ pr_err("ACP reset failed\n");
+ return ret;
+ }
+ acp6x_writel(0x03, acp_base + ACP_CLKMUX_SEL);
+ acp6x_enable_interrupts(acp_base);
+ return 0;
+}
+
+static int acp6x_deinit(void __iomem *acp_base)
+{
+ int ret;
+
+ acp6x_disable_interrupts(acp_base);
+ /* Reset */
+ ret = acp6x_reset(acp_base);
+ if (ret) {
+ pr_err("ACP reset failed\n");
+ return ret;
+ }
+ acp6x_writel(0x00, acp_base + ACP_CLKMUX_SEL);
+ acp6x_writel(0x00, acp_base + ACP_CONTROL);
+ return 0;
+}
+
+static irqreturn_t acp6x_irq_handler(int irq, void *dev_id)
+{
+ struct acp6x_dev_data *adata;
+ struct pdm_dev_data *yc_pdm_data;
+ u32 val;
+
+ adata = dev_id;
+ if (!adata)
+ return IRQ_NONE;
+
+ val = acp6x_readl(adata->acp6x_base + ACP_EXTERNAL_INTR_STAT);
+ if (val & BIT(PDM_DMA_STAT)) {
+ yc_pdm_data = dev_get_drvdata(&adata->pdev[0]->dev);
+ acp6x_writel(BIT(PDM_DMA_STAT), adata->acp6x_base + ACP_EXTERNAL_INTR_STAT);
+ if (yc_pdm_data->capture_stream)
+ snd_pcm_period_elapsed(yc_pdm_data->capture_stream);
+ return IRQ_HANDLED;
+ }
+ return IRQ_NONE;
+}
+
+static int snd_acp6x_probe(struct pci_dev *pci,
+ const struct pci_device_id *pci_id)
+{
+ struct acp6x_dev_data *adata;
+ struct platform_device_info pdevinfo[ACP6x_DEVS];
+ int index = 0;
+ int val = 0x00;
+ u32 addr;
+ unsigned int irqflags, flag;
+ int ret;
+
+ irqflags = IRQF_SHARED;
+
+ /* Return if acp config flag is defined */
+ flag = snd_amd_acp_find_config(pci);
+ if (flag)
+ return -ENODEV;
+
+ /* Yellow Carp device check */
+ switch (pci->revision) {
+ case 0x60:
+ case 0x6f:
+ break;
+ default:
+ dev_dbg(&pci->dev, "acp6x pci device not found\n");
+ return -ENODEV;
+ }
+ if (pci_enable_device(pci)) {
+ dev_err(&pci->dev, "pci_enable_device failed\n");
+ return -ENODEV;
+ }
+
+ ret = pci_request_regions(pci, "AMD ACP3x audio");
+ if (ret < 0) {
+ dev_err(&pci->dev, "pci_request_regions failed\n");
+ goto disable_pci;
+ }
+
+ adata = devm_kzalloc(&pci->dev, sizeof(struct acp6x_dev_data),
+ GFP_KERNEL);
+ if (!adata) {
+ ret = -ENOMEM;
+ goto release_regions;
+ }
+
+ addr = pci_resource_start(pci, 0);
+ adata->acp6x_base = devm_ioremap(&pci->dev, addr,
+ pci_resource_len(pci, 0));
+ if (!adata->acp6x_base) {
+ ret = -ENOMEM;
+ goto release_regions;
+ }
+ pci_set_master(pci);
+ pci_set_drvdata(pci, adata);
+ ret = acp6x_init(adata->acp6x_base);
+ if (ret)
+ goto release_regions;
+ val = acp6x_readl(adata->acp6x_base + ACP_PIN_CONFIG);
+ switch (val) {
+ case ACP_CONFIG_0:
+ case ACP_CONFIG_1:
+ case ACP_CONFIG_2:
+ case ACP_CONFIG_3:
+ case ACP_CONFIG_9:
+ case ACP_CONFIG_15:
+ dev_info(&pci->dev, "Audio Mode %d\n", val);
+ break;
+ default:
+ adata->res = devm_kzalloc(&pci->dev,
+ sizeof(struct resource),
+ GFP_KERNEL);
+ if (!adata->res) {
+ ret = -ENOMEM;
+ goto de_init;
+ }
+
+ adata->res->name = "acp_iomem";
+ adata->res->flags = IORESOURCE_MEM;
+ adata->res->start = addr;
+ adata->res->end = addr + (ACP6x_REG_END - ACP6x_REG_START);
+
+ adata->acp6x_audio_mode = ACP6x_PDM_MODE;
+
+ memset(&pdevinfo, 0, sizeof(pdevinfo));
+ pdevinfo[0].name = "acp_yc_pdm_dma";
+ pdevinfo[0].id = 0;
+ pdevinfo[0].parent = &pci->dev;
+ pdevinfo[0].num_res = 1;
+ pdevinfo[0].res = adata->res;
+
+ pdevinfo[1].name = "dmic-codec";
+ pdevinfo[1].id = 0;
+ pdevinfo[1].parent = &pci->dev;
+
+ pdevinfo[2].name = "acp_yc_mach";
+ pdevinfo[2].id = 0;
+ pdevinfo[2].parent = &pci->dev;
+
+ for (index = 0; index < ACP6x_DEVS; index++) {
+ adata->pdev[index] =
+ platform_device_register_full(&pdevinfo[index]);
+ if (IS_ERR(adata->pdev[index])) {
+ dev_err(&pci->dev, "cannot register %s device\n",
+ pdevinfo[index].name);
+ ret = PTR_ERR(adata->pdev[index]);
+ goto unregister_devs;
+ }
+ }
+ break;
+ }
+ ret = devm_request_irq(&pci->dev, pci->irq, acp6x_irq_handler,
+ irqflags, "ACP_PCI_IRQ", adata);
+ if (ret) {
+ dev_err(&pci->dev, "ACP PCI IRQ request failed\n");
+ goto unregister_devs;
+ }
+ pm_runtime_set_autosuspend_delay(&pci->dev, ACP_SUSPEND_DELAY_MS);
+ pm_runtime_use_autosuspend(&pci->dev);
+ pm_runtime_put_noidle(&pci->dev);
+ pm_runtime_allow(&pci->dev);
+
+ return 0;
+unregister_devs:
+ for (--index; index >= 0; index--)
+ platform_device_unregister(adata->pdev[index]);
+de_init:
+ if (acp6x_deinit(adata->acp6x_base))
+ dev_err(&pci->dev, "ACP de-init failed\n");
+release_regions:
+ pci_release_regions(pci);
+disable_pci:
+ pci_disable_device(pci);
+
+ return ret;
+}
+
+static int __maybe_unused snd_acp6x_suspend(struct device *dev)
+{
+ struct acp6x_dev_data *adata;
+ int ret;
+
+ adata = dev_get_drvdata(dev);
+ ret = acp6x_deinit(adata->acp6x_base);
+ if (ret)
+ dev_err(dev, "ACP de-init failed\n");
+ return ret;
+}
+
+static int __maybe_unused snd_acp6x_resume(struct device *dev)
+{
+ struct acp6x_dev_data *adata;
+ int ret;
+
+ adata = dev_get_drvdata(dev);
+ ret = acp6x_init(adata->acp6x_base);
+ if (ret)
+ dev_err(dev, "ACP init failed\n");
+ return ret;
+}
+
+static const struct dev_pm_ops acp6x_pm = {
+ SET_RUNTIME_PM_OPS(snd_acp6x_suspend, snd_acp6x_resume, NULL)
+ SET_SYSTEM_SLEEP_PM_OPS(snd_acp6x_suspend, snd_acp6x_resume)
+};
+
+static void snd_acp6x_remove(struct pci_dev *pci)
+{
+ struct acp6x_dev_data *adata;
+ int ret, index;
+
+ adata = pci_get_drvdata(pci);
+ if (adata->acp6x_audio_mode == ACP6x_PDM_MODE) {
+ for (index = 0; index < ACP6x_DEVS; index++)
+ platform_device_unregister(adata->pdev[index]);
+ }
+ ret = acp6x_deinit(adata->acp6x_base);
+ if (ret)
+ dev_err(&pci->dev, "ACP de-init failed\n");
+ pm_runtime_forbid(&pci->dev);
+ pm_runtime_get_noresume(&pci->dev);
+ pci_release_regions(pci);
+ pci_disable_device(pci);
+}
+
+static const struct pci_device_id snd_acp6x_ids[] = {
+ { PCI_DEVICE(PCI_VENDOR_ID_AMD, ACP_DEVICE_ID),
+ .class = PCI_CLASS_MULTIMEDIA_OTHER << 8,
+ .class_mask = 0xffffff },
+ { 0, },
+};
+MODULE_DEVICE_TABLE(pci, snd_acp6x_ids);
+
+static struct pci_driver yc_acp6x_driver = {
+ .name = KBUILD_MODNAME,
+ .id_table = snd_acp6x_ids,
+ .probe = snd_acp6x_probe,
+ .remove = snd_acp6x_remove,
+ .driver = {
+ .pm = &acp6x_pm,
+ }
+};
+
+module_pci_driver(yc_acp6x_driver);
+
+MODULE_AUTHOR("Vijendar.Mukunda@amd.com");
+MODULE_DESCRIPTION("AMD ACP Yellow Carp PCI driver");
+MODULE_LICENSE("GPL v2");