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path: root/sound/soc/amd/vangogh/pci-acp5x.c
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Diffstat (limited to 'sound/soc/amd/vangogh/pci-acp5x.c')
-rw-r--r--sound/soc/amd/vangogh/pci-acp5x.c326
1 files changed, 326 insertions, 0 deletions
diff --git a/sound/soc/amd/vangogh/pci-acp5x.c b/sound/soc/amd/vangogh/pci-acp5x.c
new file mode 100644
index 000000000000..a57b762d9f2e
--- /dev/null
+++ b/sound/soc/amd/vangogh/pci-acp5x.c
@@ -0,0 +1,326 @@
+// SPDX-License-Identifier: GPL-2.0+
+//
+// AMD Vangogh ACP PCI Driver
+//
+// Copyright (C) 2021 Advanced Micro Devices, Inc. All rights reserved.
+
+#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 <linux/pm_runtime.h>
+
+#include "acp5x.h"
+
+struct acp5x_dev_data {
+ void __iomem *acp5x_base;
+ bool acp5x_audio_mode;
+ struct resource *res;
+ struct platform_device *pdev[ACP5x_DEVS];
+};
+
+static int acp5x_power_on(void __iomem *acp5x_base)
+{
+ u32 val;
+ int timeout;
+
+ val = acp_readl(acp5x_base + ACP_PGFSM_STATUS);
+
+ if (val == 0)
+ return val;
+
+ if ((val & ACP_PGFSM_STATUS_MASK) !=
+ ACP_POWER_ON_IN_PROGRESS)
+ acp_writel(ACP_PGFSM_CNTL_POWER_ON_MASK,
+ acp5x_base + ACP_PGFSM_CONTROL);
+ timeout = 0;
+ while (++timeout < 500) {
+ val = acp_readl(acp5x_base + ACP_PGFSM_STATUS);
+ if ((val & ACP_PGFSM_STATUS_MASK) == ACP_POWERED_ON)
+ return 0;
+ udelay(1);
+ }
+ return -ETIMEDOUT;
+}
+
+static int acp5x_reset(void __iomem *acp5x_base)
+{
+ u32 val;
+ int timeout;
+
+ acp_writel(1, acp5x_base + ACP_SOFT_RESET);
+ timeout = 0;
+ while (++timeout < 500) {
+ val = acp_readl(acp5x_base + ACP_SOFT_RESET);
+ if (val & ACP_SOFT_RESET_SOFTRESET_AUDDONE_MASK)
+ break;
+ cpu_relax();
+ }
+ acp_writel(0, acp5x_base + ACP_SOFT_RESET);
+ timeout = 0;
+ while (++timeout < 500) {
+ val = acp_readl(acp5x_base + ACP_SOFT_RESET);
+ if (!val)
+ return 0;
+ cpu_relax();
+ }
+ return -ETIMEDOUT;
+}
+
+static void acp5x_enable_interrupts(void __iomem *acp5x_base)
+{
+ acp_writel(0x01, acp5x_base + ACP_EXTERNAL_INTR_ENB);
+}
+
+static void acp5x_disable_interrupts(void __iomem *acp5x_base)
+{
+ acp_writel(ACP_EXT_INTR_STAT_CLEAR_MASK, acp5x_base +
+ ACP_EXTERNAL_INTR_STAT);
+ acp_writel(0x00, acp5x_base + ACP_EXTERNAL_INTR_CNTL);
+ acp_writel(0x00, acp5x_base + ACP_EXTERNAL_INTR_ENB);
+}
+
+static int acp5x_init(void __iomem *acp5x_base)
+{
+ int ret;
+
+ /* power on */
+ ret = acp5x_power_on(acp5x_base);
+ if (ret) {
+ pr_err("ACP5x power on failed\n");
+ return ret;
+ }
+ /* Reset */
+ ret = acp5x_reset(acp5x_base);
+ if (ret) {
+ pr_err("ACP5x reset failed\n");
+ return ret;
+ }
+ acp5x_enable_interrupts(acp5x_base);
+ return 0;
+}
+
+static int acp5x_deinit(void __iomem *acp5x_base)
+{
+ int ret;
+
+ acp5x_disable_interrupts(acp5x_base);
+ /* Reset */
+ ret = acp5x_reset(acp5x_base);
+ if (ret) {
+ pr_err("ACP5x reset failed\n");
+ return ret;
+ }
+ return 0;
+}
+
+static int snd_acp5x_probe(struct pci_dev *pci,
+ const struct pci_device_id *pci_id)
+{
+ struct acp5x_dev_data *adata;
+ struct platform_device_info pdevinfo[ACP5x_DEVS];
+ unsigned int irqflags;
+ int ret, i;
+ u32 addr, val;
+
+ irqflags = IRQF_SHARED;
+ if (pci->revision != 0x50)
+ return -ENODEV;
+
+ if (pci_enable_device(pci)) {
+ dev_err(&pci->dev, "pci_enable_device failed\n");
+ return -ENODEV;
+ }
+
+ ret = pci_request_regions(pci, "AMD ACP5x audio");
+ if (ret < 0) {
+ dev_err(&pci->dev, "pci_request_regions failed\n");
+ goto disable_pci;
+ }
+
+ adata = devm_kzalloc(&pci->dev, sizeof(struct acp5x_dev_data),
+ GFP_KERNEL);
+ if (!adata) {
+ ret = -ENOMEM;
+ goto release_regions;
+ }
+ addr = pci_resource_start(pci, 0);
+ adata->acp5x_base = devm_ioremap(&pci->dev, addr,
+ pci_resource_len(pci, 0));
+ if (!adata->acp5x_base) {
+ ret = -ENOMEM;
+ goto release_regions;
+ }
+ pci_set_master(pci);
+ pci_set_drvdata(pci, adata);
+ ret = acp5x_init(adata->acp5x_base);
+ if (ret)
+ goto release_regions;
+
+ val = acp_readl(adata->acp5x_base + ACP_PIN_CONFIG);
+ switch (val) {
+ case I2S_MODE:
+ adata->res = devm_kzalloc(&pci->dev,
+ sizeof(struct resource) * ACP5x_RES,
+ GFP_KERNEL);
+ if (!adata->res) {
+ ret = -ENOMEM;
+ goto de_init;
+ }
+
+ adata->res[0].name = "acp5x_i2s_iomem";
+ adata->res[0].flags = IORESOURCE_MEM;
+ adata->res[0].start = addr;
+ adata->res[0].end = addr + (ACP5x_REG_END - ACP5x_REG_START);
+
+ adata->res[1].name = "acp5x_i2s_sp";
+ adata->res[1].flags = IORESOURCE_MEM;
+ adata->res[1].start = addr + ACP5x_I2STDM_REG_START;
+ adata->res[1].end = addr + ACP5x_I2STDM_REG_END;
+
+ adata->res[2].name = "acp5x_i2s_hs";
+ adata->res[2].flags = IORESOURCE_MEM;
+ adata->res[2].start = addr + ACP5x_HS_TDM_REG_START;
+ adata->res[2].end = addr + ACP5x_HS_TDM_REG_END;
+
+ adata->res[3].name = "acp5x_i2s_irq";
+ adata->res[3].flags = IORESOURCE_IRQ;
+ adata->res[3].start = pci->irq;
+ adata->res[3].end = adata->res[3].start;
+
+ adata->acp5x_audio_mode = ACP5x_I2S_MODE;
+
+ memset(&pdevinfo, 0, sizeof(pdevinfo));
+ pdevinfo[0].name = "acp5x_i2s_dma";
+ pdevinfo[0].id = 0;
+ pdevinfo[0].parent = &pci->dev;
+ pdevinfo[0].num_res = 4;
+ pdevinfo[0].res = &adata->res[0];
+ pdevinfo[0].data = &irqflags;
+ pdevinfo[0].size_data = sizeof(irqflags);
+
+ pdevinfo[1].name = "acp5x_i2s_playcap";
+ pdevinfo[1].id = 0;
+ pdevinfo[1].parent = &pci->dev;
+ pdevinfo[1].num_res = 1;
+ pdevinfo[1].res = &adata->res[1];
+
+ pdevinfo[2].name = "acp5x_i2s_playcap";
+ pdevinfo[2].id = 1;
+ pdevinfo[2].parent = &pci->dev;
+ pdevinfo[2].num_res = 1;
+ pdevinfo[2].res = &adata->res[2];
+
+ for (i = 0; i < ACP5x_DEVS; i++) {
+ adata->pdev[i] =
+ platform_device_register_full(&pdevinfo[i]);
+ if (IS_ERR(adata->pdev[i])) {
+ dev_err(&pci->dev, "cannot register %s device\n",
+ pdevinfo[i].name);
+ ret = PTR_ERR(adata->pdev[i]);
+ goto unregister_devs;
+ }
+ }
+ break;
+ default:
+ dev_info(&pci->dev, "ACP audio mode : %d\n", val);
+ }
+ pm_runtime_set_autosuspend_delay(&pci->dev, 2000);
+ pm_runtime_use_autosuspend(&pci->dev);
+ pm_runtime_put_noidle(&pci->dev);
+ pm_runtime_allow(&pci->dev);
+ return 0;
+
+unregister_devs:
+ for (--i; i >= 0; i--)
+ platform_device_unregister(adata->pdev[i]);
+de_init:
+ if (acp5x_deinit(adata->acp5x_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_acp5x_suspend(struct device *dev)
+{
+ int ret;
+ struct acp5x_dev_data *adata;
+
+ adata = dev_get_drvdata(dev);
+ ret = acp5x_deinit(adata->acp5x_base);
+ if (ret)
+ dev_err(dev, "ACP de-init failed\n");
+ else
+ dev_dbg(dev, "ACP de-initialized\n");
+
+ return ret;
+}
+
+static int __maybe_unused snd_acp5x_resume(struct device *dev)
+{
+ int ret;
+ struct acp5x_dev_data *adata;
+
+ adata = dev_get_drvdata(dev);
+ ret = acp5x_init(adata->acp5x_base);
+ if (ret) {
+ dev_err(dev, "ACP init failed\n");
+ return ret;
+ }
+ return 0;
+}
+
+static const struct dev_pm_ops acp5x_pm = {
+ SET_RUNTIME_PM_OPS(snd_acp5x_suspend,
+ snd_acp5x_resume, NULL)
+ SET_SYSTEM_SLEEP_PM_OPS(snd_acp5x_suspend, snd_acp5x_resume)
+};
+
+static void snd_acp5x_remove(struct pci_dev *pci)
+{
+ struct acp5x_dev_data *adata;
+ int i, ret;
+
+ adata = pci_get_drvdata(pci);
+ if (adata->acp5x_audio_mode == ACP5x_I2S_MODE) {
+ for (i = 0; i < ACP5x_DEVS; i++)
+ platform_device_unregister(adata->pdev[i]);
+ }
+ ret = acp5x_deinit(adata->acp5x_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_acp5x_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_acp5x_ids);
+
+static struct pci_driver acp5x_driver = {
+ .name = KBUILD_MODNAME,
+ .id_table = snd_acp5x_ids,
+ .probe = snd_acp5x_probe,
+ .remove = snd_acp5x_remove,
+ .driver = {
+ .pm = &acp5x_pm,
+ }
+};
+
+module_pci_driver(acp5x_driver);
+
+MODULE_AUTHOR("Vijendar.Mukunda@amd.com");
+MODULE_DESCRIPTION("AMD Vangogh ACP PCI driver");
+MODULE_LICENSE("GPL v2");
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-16 08:44:07 +0000