From: Maruthi Srinivas Bayyavarapu Maruthi.Bayyavarapu@amd.com
ACP 3.0 is a PCI audio device. This patch adds PCI driver to bind to this device and get PCI resources.
Signed-off-by: Maruthi Bayyavarapu maruthi.bayyavarapu@amd.com Signed-off-by: Sanju R Mehta sanju.mehta@amd.com Tested-by: Ravulapati Vishnu vardhan Rao Vishnuvardhanrao.Ravulapati@amd.com Signed-off-by: Vijendar Mukunda vijendar.mukunda@amd.com --- sound/soc/amd/raven/acp3x.h | 13 ++++++ sound/soc/amd/raven/pci-acp3x.c | 97 +++++++++++++++++++++++++++++++++++++++++ 2 files changed, 110 insertions(+) create mode 100644 sound/soc/amd/raven/acp3x.h create mode 100644 sound/soc/amd/raven/pci-acp3x.c
diff --git a/sound/soc/amd/raven/acp3x.h b/sound/soc/amd/raven/acp3x.h new file mode 100644 index 0000000..e9b4df0 --- /dev/null +++ b/sound/soc/amd/raven/acp3x.h @@ -0,0 +1,13 @@ +#include "chip_offset_byte.h" + +#define ACP3x_PHY_BASE_ADDRESS 0x1240000 + +static inline u32 rv_readl(void __iomem *base_addr) +{ + return readl(base_addr - ACP3x_PHY_BASE_ADDRESS); +} + +static inline void rv_writel(u32 val, void __iomem *base_addr) +{ + writel(val, base_addr - ACP3x_PHY_BASE_ADDRESS); +} diff --git a/sound/soc/amd/raven/pci-acp3x.c b/sound/soc/amd/raven/pci-acp3x.c new file mode 100644 index 0000000..27588ed --- /dev/null +++ b/sound/soc/amd/raven/pci-acp3x.c @@ -0,0 +1,97 @@ +/* + * AMD ALSA SoC PCM Driver + * + * Copyright 2016 Advanced Micro Devices, Inc. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + */ + +#include <linux/pci.h> +#include <linux/module.h> +#include <linux/io.h> + +#include "acp3x.h" + +struct acp3x_dev_data { + void __iomem *acp3x_base; +}; + +static int snd_acp3x_probe(struct pci_dev *pci, + const struct pci_device_id *pci_id) +{ + int ret; + u32 addr; + struct acp3x_dev_data *adata; + + 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; + } + + addr = pci_resource_start(pci, 0); + adata->acp3x_base = ioremap(addr, pci_resource_len(pci, 0)); + if (!adata->acp3x_base) { + ret = -ENOMEM; + goto release_regions; + } + pci_set_master(pci); + pci_set_drvdata(pci, adata); + return 0; + +release_regions: + pci_release_regions(pci); +disable_pci: + pci_disable_device(pci); + + return ret; +} + +static void snd_acp3x_remove(struct pci_dev *pci) +{ + struct acp3x_dev_data *adata = pci_get_drvdata(pci); + + iounmap(adata->acp3x_base); + 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, +}; + +module_pci_driver(acp3x_driver); + +MODULE_AUTHOR("Maruthi.Bayyavarapu@amd.com"); +MODULE_DESCRIPTION("AMD ACP3x PCI driver"); +MODULE_LICENSE("GPL v2");