diff options
Diffstat (limited to 'sound/soc/loongson/loongson_i2s_pci.c')
| -rw-r--r-- | sound/soc/loongson/loongson_i2s_pci.c | 171 |
1 files changed, 171 insertions, 0 deletions
diff --git a/sound/soc/loongson/loongson_i2s_pci.c b/sound/soc/loongson/loongson_i2s_pci.c new file mode 100644 index 000000000000..fa90361865c6 --- /dev/null +++ b/sound/soc/loongson/loongson_i2s_pci.c @@ -0,0 +1,171 @@ +// SPDX-License-Identifier: GPL-2.0 +// +// loongson_i2s_pci.c -- Loongson I2S controller driver +// +// Copyright (C) 2023 Loongson Technology Corporation Limited +// Author: Yingkun Meng <mengyingkun@loongson.cn> +// + +#include <linux/module.h> +#include <linux/delay.h> +#include <linux/pm_runtime.h> +#include <linux/dma-mapping.h> +#include <linux/acpi.h> +#include <linux/pci.h> +#include <sound/soc.h> +#include "loongson_i2s.h" +#include "loongson_dma.h" + +static bool loongson_i2s_wr_reg(struct device *dev, unsigned int reg) +{ + switch (reg) { + case LS_I2S_CFG: + case LS_I2S_CTRL: + case LS_I2S_RX_DATA: + case LS_I2S_TX_DATA: + case LS_I2S_CFG1: + return true; + default: + return false; + }; +} + +static bool loongson_i2s_rd_reg(struct device *dev, unsigned int reg) +{ + switch (reg) { + case LS_I2S_VER: + case LS_I2S_CFG: + case LS_I2S_CTRL: + case LS_I2S_RX_DATA: + case LS_I2S_TX_DATA: + case LS_I2S_CFG1: + return true; + default: + return false; + }; +} + +static bool loongson_i2s_volatile_reg(struct device *dev, unsigned int reg) +{ + switch (reg) { + case LS_I2S_CFG: + case LS_I2S_CTRL: + case LS_I2S_RX_DATA: + case LS_I2S_TX_DATA: + case LS_I2S_CFG1: + return true; + default: + return false; + }; +} + +static const struct regmap_config loongson_i2s_regmap_config = { + .reg_bits = 32, + .reg_stride = 4, + .val_bits = 32, + .max_register = LS_I2S_CFG1, + .writeable_reg = loongson_i2s_wr_reg, + .readable_reg = loongson_i2s_rd_reg, + .volatile_reg = loongson_i2s_volatile_reg, + .cache_type = REGCACHE_FLAT, +}; + +static int loongson_i2s_pci_probe(struct pci_dev *pdev, + const struct pci_device_id *pid) +{ + const struct fwnode_handle *fwnode = pdev->dev.fwnode; + struct loongson_dma_data *tx_data, *rx_data; + struct loongson_i2s *i2s; + int ret; + + if (pcim_enable_device(pdev)) { + dev_err(&pdev->dev, "pci_enable_device failed\n"); + return -ENODEV; + } + + i2s = devm_kzalloc(&pdev->dev, sizeof(*i2s), GFP_KERNEL); + if (!i2s) + return -ENOMEM; + + i2s->rev_id = pdev->revision; + i2s->dev = &pdev->dev; + pci_set_drvdata(pdev, i2s); + + ret = pcim_iomap_regions(pdev, 1 << 0, dev_name(&pdev->dev)); + if (ret < 0) { + dev_err(&pdev->dev, "iomap_regions failed\n"); + return ret; + } + i2s->reg_base = pcim_iomap_table(pdev)[0]; + i2s->regmap = devm_regmap_init_mmio(&pdev->dev, i2s->reg_base, + &loongson_i2s_regmap_config); + if (IS_ERR(i2s->regmap)) { + dev_err(&pdev->dev, "regmap_init_mmio failed\n"); + return PTR_ERR(i2s->regmap); + } + + tx_data = &i2s->tx_dma_data; + rx_data = &i2s->rx_dma_data; + + tx_data->dev_addr = pci_resource_start(pdev, 0) + LS_I2S_TX_DATA; + tx_data->order_addr = i2s->reg_base + LS_I2S_TX_ORDER; + + rx_data->dev_addr = pci_resource_start(pdev, 0) + LS_I2S_RX_DATA; + rx_data->order_addr = i2s->reg_base + LS_I2S_RX_ORDER; + + tx_data->irq = fwnode_irq_get_byname(fwnode, "tx"); + if (tx_data->irq < 0) { + dev_err(&pdev->dev, "dma tx irq invalid\n"); + return tx_data->irq; + } + + rx_data->irq = fwnode_irq_get_byname(fwnode, "rx"); + if (rx_data->irq < 0) { + dev_err(&pdev->dev, "dma rx irq invalid\n"); + return rx_data->irq; + } + + device_property_read_u32(&pdev->dev, "clock-frequency", &i2s->clk_rate); + if (!i2s->clk_rate) { + dev_err(&pdev->dev, "clock-frequency property invalid\n"); + return -EINVAL; + } + + dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); + + if (i2s->rev_id == 1) { + regmap_write(i2s->regmap, LS_I2S_CTRL, I2S_CTRL_RESET); + udelay(200); + } + + ret = devm_snd_soc_register_component(&pdev->dev, + &loongson_i2s_component, + &loongson_i2s_dai, 1); + if (ret) { + dev_err(&pdev->dev, "register DAI failed %d\n", ret); + return ret; + } + + return 0; +} + +static const struct pci_device_id loongson_i2s_ids[] = { + { PCI_DEVICE(PCI_VENDOR_ID_LOONGSON, 0x7a27) }, + { }, +}; +MODULE_DEVICE_TABLE(pci, loongson_i2s_ids); + +static struct pci_driver loongson_i2s_driver = { + .name = "loongson-i2s-pci", + .id_table = loongson_i2s_ids, + .probe = loongson_i2s_pci_probe, + .driver = { + .owner = THIS_MODULE, + .pm = pm_sleep_ptr(&loongson_i2s_pm), + }, +}; +module_pci_driver(loongson_i2s_driver); + +MODULE_DESCRIPTION("Loongson I2S Master Mode ASoC Driver"); +MODULE_AUTHOR("Loongson Technology Corporation Limited"); +MODULE_LICENSE("GPL"); |