348 lines
7.9 KiB
C
348 lines
7.9 KiB
C
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// SPDX-License-Identifier: GPL-2.0+
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//
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// AMD ACP PCI Driver
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//
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//Copyright 2016 Advanced Micro Devices, Inc.
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#include <linux/pci.h>
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#include <linux/module.h>
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#include <linux/io.h>
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#include <linux/platform_device.h>
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#include <linux/interrupt.h>
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#include <linux/pm_runtime.h>
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#include <linux/delay.h>
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#include "acp3x.h"
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struct acp3x_dev_data {
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void __iomem *acp3x_base;
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bool acp3x_audio_mode;
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struct resource *res;
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struct platform_device *pdev[ACP3x_DEVS];
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u32 pme_en;
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};
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static int acp3x_power_on(struct acp3x_dev_data *adata)
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{
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void __iomem *acp3x_base = adata->acp3x_base;
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u32 val;
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int timeout;
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val = rv_readl(acp3x_base + mmACP_PGFSM_STATUS);
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if (val == 0)
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return val;
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if (!((val & ACP_PGFSM_STATUS_MASK) ==
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ACP_POWER_ON_IN_PROGRESS))
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rv_writel(ACP_PGFSM_CNTL_POWER_ON_MASK,
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acp3x_base + mmACP_PGFSM_CONTROL);
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timeout = 0;
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while (++timeout < 500) {
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val = rv_readl(acp3x_base + mmACP_PGFSM_STATUS);
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if (!val) {
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/* ACP power On clears PME_EN.
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* Restore the value to its prior state
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*/
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rv_writel(adata->pme_en, acp3x_base + mmACP_PME_EN);
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return 0;
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}
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udelay(1);
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}
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return -ETIMEDOUT;
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}
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static int acp3x_reset(void __iomem *acp3x_base)
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{
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u32 val;
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int timeout;
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rv_writel(1, acp3x_base + mmACP_SOFT_RESET);
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timeout = 0;
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while (++timeout < 500) {
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val = rv_readl(acp3x_base + mmACP_SOFT_RESET);
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if (val & ACP3x_SOFT_RESET__SoftResetAudDone_MASK)
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break;
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cpu_relax();
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}
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rv_writel(0, acp3x_base + mmACP_SOFT_RESET);
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timeout = 0;
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while (++timeout < 500) {
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val = rv_readl(acp3x_base + mmACP_SOFT_RESET);
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if (!val)
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return 0;
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cpu_relax();
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}
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return -ETIMEDOUT;
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}
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static void acp3x_enable_interrupts(void __iomem *acp_base)
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{
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rv_writel(0x01, acp_base + mmACP_EXTERNAL_INTR_ENB);
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}
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static void acp3x_disable_interrupts(void __iomem *acp_base)
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{
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rv_writel(ACP_EXT_INTR_STAT_CLEAR_MASK, acp_base +
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mmACP_EXTERNAL_INTR_STAT);
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rv_writel(0x00, acp_base + mmACP_EXTERNAL_INTR_CNTL);
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rv_writel(0x00, acp_base + mmACP_EXTERNAL_INTR_ENB);
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}
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static int acp3x_init(struct acp3x_dev_data *adata)
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{
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void __iomem *acp3x_base = adata->acp3x_base;
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int ret;
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/* power on */
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ret = acp3x_power_on(adata);
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if (ret) {
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pr_err("ACP3x power on failed\n");
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return ret;
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}
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/* Reset */
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ret = acp3x_reset(acp3x_base);
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if (ret) {
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pr_err("ACP3x reset failed\n");
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return ret;
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}
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acp3x_enable_interrupts(acp3x_base);
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return 0;
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}
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static int acp3x_deinit(void __iomem *acp3x_base)
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{
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int ret;
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acp3x_disable_interrupts(acp3x_base);
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/* Reset */
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ret = acp3x_reset(acp3x_base);
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if (ret) {
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pr_err("ACP3x reset failed\n");
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return ret;
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}
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return 0;
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}
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static int snd_acp3x_probe(struct pci_dev *pci,
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const struct pci_device_id *pci_id)
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{
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struct acp3x_dev_data *adata;
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struct platform_device_info pdevinfo[ACP3x_DEVS];
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unsigned int irqflags;
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int ret, i;
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u32 addr, val;
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/* Raven device detection */
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if (pci->revision != 0x00)
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return -ENODEV;
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if (pci_enable_device(pci)) {
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dev_err(&pci->dev, "pci_enable_device failed\n");
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return -ENODEV;
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}
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ret = pci_request_regions(pci, "AMD ACP3x audio");
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if (ret < 0) {
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dev_err(&pci->dev, "pci_request_regions failed\n");
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goto disable_pci;
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}
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adata = devm_kzalloc(&pci->dev, sizeof(struct acp3x_dev_data),
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GFP_KERNEL);
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if (!adata) {
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ret = -ENOMEM;
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goto release_regions;
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}
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irqflags = IRQF_SHARED;
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addr = pci_resource_start(pci, 0);
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adata->acp3x_base = devm_ioremap(&pci->dev, addr,
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pci_resource_len(pci, 0));
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if (!adata->acp3x_base) {
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ret = -ENOMEM;
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goto release_regions;
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}
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pci_set_master(pci);
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pci_set_drvdata(pci, adata);
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/* Save ACP_PME_EN state */
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adata->pme_en = rv_readl(adata->acp3x_base + mmACP_PME_EN);
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ret = acp3x_init(adata);
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if (ret)
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goto release_regions;
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val = rv_readl(adata->acp3x_base + mmACP_I2S_PIN_CONFIG);
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switch (val) {
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case I2S_MODE:
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adata->res = devm_kzalloc(&pci->dev,
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sizeof(struct resource) * 4,
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GFP_KERNEL);
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if (!adata->res) {
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ret = -ENOMEM;
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goto de_init;
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}
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adata->res[0].name = "acp3x_i2s_iomem";
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adata->res[0].flags = IORESOURCE_MEM;
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adata->res[0].start = addr;
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adata->res[0].end = addr + (ACP3x_REG_END - ACP3x_REG_START);
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adata->res[1].name = "acp3x_i2s_sp";
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adata->res[1].flags = IORESOURCE_MEM;
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adata->res[1].start = addr + ACP3x_I2STDM_REG_START;
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adata->res[1].end = addr + ACP3x_I2STDM_REG_END;
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adata->res[2].name = "acp3x_i2s_bt";
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adata->res[2].flags = IORESOURCE_MEM;
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adata->res[2].start = addr + ACP3x_BT_TDM_REG_START;
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adata->res[2].end = addr + ACP3x_BT_TDM_REG_END;
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adata->res[3].name = "acp3x_i2s_irq";
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adata->res[3].flags = IORESOURCE_IRQ;
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adata->res[3].start = pci->irq;
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adata->res[3].end = adata->res[3].start;
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adata->acp3x_audio_mode = ACP3x_I2S_MODE;
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memset(&pdevinfo, 0, sizeof(pdevinfo));
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pdevinfo[0].name = "acp3x_rv_i2s_dma";
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pdevinfo[0].id = 0;
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pdevinfo[0].parent = &pci->dev;
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pdevinfo[0].num_res = 4;
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pdevinfo[0].res = &adata->res[0];
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pdevinfo[0].data = &irqflags;
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pdevinfo[0].size_data = sizeof(irqflags);
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pdevinfo[1].name = "acp3x_i2s_playcap";
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pdevinfo[1].id = 0;
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pdevinfo[1].parent = &pci->dev;
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pdevinfo[1].num_res = 1;
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pdevinfo[1].res = &adata->res[1];
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pdevinfo[2].name = "acp3x_i2s_playcap";
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pdevinfo[2].id = 1;
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pdevinfo[2].parent = &pci->dev;
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pdevinfo[2].num_res = 1;
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pdevinfo[2].res = &adata->res[1];
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pdevinfo[3].name = "acp3x_i2s_playcap";
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pdevinfo[3].id = 2;
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pdevinfo[3].parent = &pci->dev;
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pdevinfo[3].num_res = 1;
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pdevinfo[3].res = &adata->res[2];
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for (i = 0; i < ACP3x_DEVS; i++) {
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adata->pdev[i] =
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platform_device_register_full(&pdevinfo[i]);
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if (IS_ERR(adata->pdev[i])) {
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dev_err(&pci->dev, "cannot register %s device\n",
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pdevinfo[i].name);
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ret = PTR_ERR(adata->pdev[i]);
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goto unregister_devs;
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}
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}
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break;
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default:
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dev_info(&pci->dev, "ACP audio mode : %d\n", val);
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break;
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}
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pm_runtime_set_autosuspend_delay(&pci->dev, 2000);
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pm_runtime_use_autosuspend(&pci->dev);
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pm_runtime_put_noidle(&pci->dev);
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pm_runtime_allow(&pci->dev);
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return 0;
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unregister_devs:
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if (val == I2S_MODE)
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for (i = 0; i < ACP3x_DEVS; i++)
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platform_device_unregister(adata->pdev[i]);
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de_init:
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if (acp3x_deinit(adata->acp3x_base))
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dev_err(&pci->dev, "ACP de-init failed\n");
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release_regions:
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pci_release_regions(pci);
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disable_pci:
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pci_disable_device(pci);
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return ret;
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}
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static int snd_acp3x_suspend(struct device *dev)
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{
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int ret;
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struct acp3x_dev_data *adata;
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adata = dev_get_drvdata(dev);
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ret = acp3x_deinit(adata->acp3x_base);
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if (ret)
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dev_err(dev, "ACP de-init failed\n");
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else
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dev_dbg(dev, "ACP de-initialized\n");
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return 0;
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}
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static int snd_acp3x_resume(struct device *dev)
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{
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int ret;
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struct acp3x_dev_data *adata;
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adata = dev_get_drvdata(dev);
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ret = acp3x_init(adata);
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if (ret) {
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dev_err(dev, "ACP init failed\n");
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return ret;
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}
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return 0;
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}
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static const struct dev_pm_ops acp3x_pm = {
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.runtime_suspend = snd_acp3x_suspend,
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.runtime_resume = snd_acp3x_resume,
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.resume = snd_acp3x_resume,
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};
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static void snd_acp3x_remove(struct pci_dev *pci)
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{
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struct acp3x_dev_data *adata;
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int i, ret;
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adata = pci_get_drvdata(pci);
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if (adata->acp3x_audio_mode == ACP3x_I2S_MODE) {
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for (i = 0; i < ACP3x_DEVS; i++)
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platform_device_unregister(adata->pdev[i]);
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}
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ret = acp3x_deinit(adata->acp3x_base);
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if (ret)
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dev_err(&pci->dev, "ACP de-init failed\n");
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pm_runtime_forbid(&pci->dev);
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pm_runtime_get_noresume(&pci->dev);
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pci_release_regions(pci);
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pci_disable_device(pci);
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}
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static const struct pci_device_id snd_acp3x_ids[] = {
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{ PCI_DEVICE(PCI_VENDOR_ID_AMD, 0x15e2),
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.class = PCI_CLASS_MULTIMEDIA_OTHER << 8,
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.class_mask = 0xffffff },
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{ 0, },
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};
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MODULE_DEVICE_TABLE(pci, snd_acp3x_ids);
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static struct pci_driver acp3x_driver = {
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.name = KBUILD_MODNAME,
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.id_table = snd_acp3x_ids,
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.probe = snd_acp3x_probe,
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.remove = snd_acp3x_remove,
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.driver = {
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.pm = &acp3x_pm,
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}
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};
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module_pci_driver(acp3x_driver);
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MODULE_AUTHOR("Vishnuvardhanrao.Ravulapati@amd.com");
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MODULE_AUTHOR("Maruthi.Bayyavarapu@amd.com");
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MODULE_DESCRIPTION("AMD ACP3x PCI driver");
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MODULE_LICENSE("GPL v2");
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