diff options
Diffstat (limited to 'sound/soc/amd/raven/pci-acp3x.c')
| -rw-r--r-- | sound/soc/amd/raven/pci-acp3x.c | 358 |
1 files changed, 358 insertions, 0 deletions
diff --git a/sound/soc/amd/raven/pci-acp3x.c b/sound/soc/amd/raven/pci-acp3x.c new file mode 100644 index 000000000..df83d2ce7 --- /dev/null +++ b/sound/soc/amd/raven/pci-acp3x.c @@ -0,0 +1,358 @@ +// SPDX-License-Identifier: GPL-2.0+ +// +// AMD ACP PCI Driver +// +//Copyright 2016 Advanced Micro Devices, Inc. + +#include <linux/pci.h> +#include <linux/module.h> +#include <linux/io.h> +#include <linux/platform_device.h> +#include <linux/interrupt.h> +#include <linux/pm_runtime.h> +#include <linux/delay.h> + +#include "acp3x.h" + +struct acp3x_dev_data { + void __iomem *acp3x_base; + bool acp3x_audio_mode; + struct resource *res; + struct platform_device *pdev[ACP3x_DEVS]; + u32 pme_en; +}; + +static int acp3x_power_on(struct acp3x_dev_data *adata) +{ + void __iomem *acp3x_base = adata->acp3x_base; + u32 val; + int timeout; + + val = rv_readl(acp3x_base + mmACP_PGFSM_STATUS); + + if (val == 0) + return val; + + if (!((val & ACP_PGFSM_STATUS_MASK) == + ACP_POWER_ON_IN_PROGRESS)) + rv_writel(ACP_PGFSM_CNTL_POWER_ON_MASK, + acp3x_base + mmACP_PGFSM_CONTROL); + timeout = 0; + while (++timeout < 500) { + val = rv_readl(acp3x_base + mmACP_PGFSM_STATUS); + if (!val) { + /* ACP power On clears PME_EN. + * Restore the value to its prior state + */ + rv_writel(adata->pme_en, acp3x_base + mmACP_PME_EN); + return 0; + } + udelay(1); + } + return -ETIMEDOUT; +} + +static int acp3x_reset(void __iomem *acp3x_base) +{ + u32 val; + int timeout; + + rv_writel(1, acp3x_base + mmACP_SOFT_RESET); + timeout = 0; + while (++timeout < 500) { + val = rv_readl(acp3x_base + mmACP_SOFT_RESET); + if (val & ACP3x_SOFT_RESET__SoftResetAudDone_MASK) + break; + cpu_relax(); + } + rv_writel(0, acp3x_base + mmACP_SOFT_RESET); + timeout = 0; + while (++timeout < 500) { + val = rv_readl(acp3x_base + mmACP_SOFT_RESET); + if (!val) + return 0; + cpu_relax(); + } + return -ETIMEDOUT; +} + +static void acp3x_enable_interrupts(void __iomem *acp_base) +{ + rv_writel(0x01, acp_base + mmACP_EXTERNAL_INTR_ENB); +} + +static void acp3x_disable_interrupts(void __iomem *acp_base) +{ + rv_writel(ACP_EXT_INTR_STAT_CLEAR_MASK, acp_base + + mmACP_EXTERNAL_INTR_STAT); + rv_writel(0x00, acp_base + mmACP_EXTERNAL_INTR_CNTL); + rv_writel(0x00, acp_base + mmACP_EXTERNAL_INTR_ENB); +} + +static int acp3x_init(struct acp3x_dev_data *adata) +{ + void __iomem *acp3x_base = adata->acp3x_base; + int ret; + + /* power on */ + ret = acp3x_power_on(adata); + if (ret) { + pr_err("ACP3x power on failed\n"); + return ret; + } + /* Reset */ + ret = acp3x_reset(acp3x_base); + if (ret) { + pr_err("ACP3x reset failed\n"); + return ret; + } + acp3x_enable_interrupts(acp3x_base); + return 0; +} + +static int acp3x_deinit(void __iomem *acp3x_base) +{ + int ret; + + acp3x_disable_interrupts(acp3x_base); + /* Reset */ + ret = acp3x_reset(acp3x_base); + if (ret) { + pr_err("ACP3x reset failed\n"); + return ret; + } + return 0; +} + +static int snd_acp3x_probe(struct pci_dev *pci, + const struct pci_device_id *pci_id) +{ + struct acp3x_dev_data *adata; + struct platform_device_info pdevinfo[ACP3x_DEVS]; + unsigned int irqflags; + int ret, i; + u32 addr, val; + + /* Raven device detection */ + if (pci->revision != 0x00) + 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 acp3x_dev_data), + GFP_KERNEL); + if (!adata) { + ret = -ENOMEM; + goto release_regions; + } + + /* check for msi interrupt support */ + ret = pci_enable_msi(pci); + if (ret) + /* msi is not enabled */ + irqflags = IRQF_SHARED; + else + /* msi is enabled */ + irqflags = 0; + + addr = pci_resource_start(pci, 0); + adata->acp3x_base = devm_ioremap(&pci->dev, addr, + pci_resource_len(pci, 0)); + if (!adata->acp3x_base) { + ret = -ENOMEM; + goto disable_msi; + } + pci_set_master(pci); + pci_set_drvdata(pci, adata); + /* Save ACP_PME_EN state */ + adata->pme_en = rv_readl(adata->acp3x_base + mmACP_PME_EN); + ret = acp3x_init(adata); + if (ret) + goto disable_msi; + + val = rv_readl(adata->acp3x_base + mmACP_I2S_PIN_CONFIG); + switch (val) { + case I2S_MODE: + adata->res = devm_kzalloc(&pci->dev, + sizeof(struct resource) * 4, + GFP_KERNEL); + if (!adata->res) { + ret = -ENOMEM; + goto de_init; + } + + adata->res[0].name = "acp3x_i2s_iomem"; + adata->res[0].flags = IORESOURCE_MEM; + adata->res[0].start = addr; + adata->res[0].end = addr + (ACP3x_REG_END - ACP3x_REG_START); + + adata->res[1].name = "acp3x_i2s_sp"; + adata->res[1].flags = IORESOURCE_MEM; + adata->res[1].start = addr + ACP3x_I2STDM_REG_START; + adata->res[1].end = addr + ACP3x_I2STDM_REG_END; + + adata->res[2].name = "acp3x_i2s_bt"; + adata->res[2].flags = IORESOURCE_MEM; + adata->res[2].start = addr + ACP3x_BT_TDM_REG_START; + adata->res[2].end = addr + ACP3x_BT_TDM_REG_END; + + adata->res[3].name = "acp3x_i2s_irq"; + adata->res[3].flags = IORESOURCE_IRQ; + adata->res[3].start = pci->irq; + adata->res[3].end = adata->res[3].start; + + adata->acp3x_audio_mode = ACP3x_I2S_MODE; + + memset(&pdevinfo, 0, sizeof(pdevinfo)); + pdevinfo[0].name = "acp3x_rv_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 = "acp3x_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 = "acp3x_i2s_playcap"; + pdevinfo[2].id = 1; + pdevinfo[2].parent = &pci->dev; + pdevinfo[2].num_res = 1; + pdevinfo[2].res = &adata->res[1]; + + pdevinfo[3].name = "acp3x_i2s_playcap"; + pdevinfo[3].id = 2; + pdevinfo[3].parent = &pci->dev; + pdevinfo[3].num_res = 1; + pdevinfo[3].res = &adata->res[2]; + for (i = 0; i < ACP3x_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_err(&pci->dev, "Invalid ACP audio mode : %d\n", val); + ret = -ENODEV; + goto disable_msi; + } + 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: + if (val == I2S_MODE) + for (i = 0; i < ACP3x_DEVS; i++) + platform_device_unregister(adata->pdev[i]); +de_init: + if (acp3x_deinit(adata->acp3x_base)) + dev_err(&pci->dev, "ACP de-init failed\n"); +disable_msi: + pci_disable_msi(pci); +release_regions: + pci_release_regions(pci); +disable_pci: + pci_disable_device(pci); + + return ret; +} + +static int snd_acp3x_suspend(struct device *dev) +{ + int ret; + struct acp3x_dev_data *adata; + + adata = dev_get_drvdata(dev); + ret = acp3x_deinit(adata->acp3x_base); + if (ret) + dev_err(dev, "ACP de-init failed\n"); + else + dev_dbg(dev, "ACP de-initialized\n"); + + return 0; +} + +static int snd_acp3x_resume(struct device *dev) +{ + int ret; + struct acp3x_dev_data *adata; + + adata = dev_get_drvdata(dev); + ret = acp3x_init(adata); + if (ret) { + dev_err(dev, "ACP init failed\n"); + return ret; + } + return 0; +} + +static const struct dev_pm_ops acp3x_pm = { + .runtime_suspend = snd_acp3x_suspend, + .runtime_resume = snd_acp3x_resume, + .resume = snd_acp3x_resume, +}; + +static void snd_acp3x_remove(struct pci_dev *pci) +{ + struct acp3x_dev_data *adata; + int i, ret; + + adata = pci_get_drvdata(pci); + if (adata->acp3x_audio_mode == ACP3x_I2S_MODE) { + for (i = 0; i < ACP3x_DEVS; i++) + platform_device_unregister(adata->pdev[i]); + } + ret = acp3x_deinit(adata->acp3x_base); + if (ret) + dev_err(&pci->dev, "ACP de-init failed\n"); + pm_runtime_forbid(&pci->dev); + pm_runtime_get_noresume(&pci->dev); + pci_disable_msi(pci); + pci_release_regions(pci); + pci_disable_device(pci); +} + +static const struct pci_device_id snd_acp3x_ids[] = { + { PCI_DEVICE(PCI_VENDOR_ID_AMD, 0x15e2), + .class = PCI_CLASS_MULTIMEDIA_OTHER << 8, + .class_mask = 0xffffff }, + { 0, }, +}; +MODULE_DEVICE_TABLE(pci, snd_acp3x_ids); + +static struct pci_driver acp3x_driver = { + .name = KBUILD_MODNAME, + .id_table = snd_acp3x_ids, + .probe = snd_acp3x_probe, + .remove = snd_acp3x_remove, + .driver = { + .pm = &acp3x_pm, + } +}; + +module_pci_driver(acp3x_driver); + +MODULE_AUTHOR("Vishnuvardhanrao.Ravulapati@amd.com"); +MODULE_AUTHOR("Maruthi.Bayyavarapu@amd.com"); +MODULE_DESCRIPTION("AMD ACP3x PCI driver"); +MODULE_LICENSE("GPL v2"); |