1 // SPDX-License-Identifier: GPL-2.0
3 // loongson_i2s_pci.c -- Loongson I2S controller driver
12 #include <linux/dma-mapping.h>
76 	const struct fwnode_handle *fwnode = pdev->dev.fwnode;  in loongson_i2s_pci_probe()
78 	struct device *dev = &pdev->dev;  in loongson_i2s_pci_probe()
79 	struct loongson_i2s *i2s;  in loongson_i2s_pci_probe()  local
84 		return -ENODEV;  in loongson_i2s_pci_probe()
87 	i2s = devm_kzalloc(dev, sizeof(*i2s), GFP_KERNEL);  in loongson_i2s_pci_probe()
88 	if (!i2s)  in loongson_i2s_pci_probe()
89 		return -ENOMEM;  in loongson_i2s_pci_probe()
91 	i2s->rev_id = pdev->revision;  in loongson_i2s_pci_probe()
92 	i2s->dev = dev;  in loongson_i2s_pci_probe()
93 	pci_set_drvdata(pdev, i2s);  in loongson_i2s_pci_probe()
101 	i2s->reg_base = pcim_iomap_table(pdev)[0];  in loongson_i2s_pci_probe()
102 	i2s->regmap = devm_regmap_init_mmio(dev, i2s->reg_base,  in loongson_i2s_pci_probe()
104 	if (IS_ERR(i2s->regmap))  in loongson_i2s_pci_probe()
105 		return dev_err_probe(dev, PTR_ERR(i2s->regmap), "regmap_init_mmio failed\n");  in loongson_i2s_pci_probe()
107 	tx_data = &i2s->tx_dma_data;  in loongson_i2s_pci_probe()
108 	rx_data = &i2s->rx_dma_data;  in loongson_i2s_pci_probe()
110 	tx_data->dev_addr = pci_resource_start(pdev, 0) + LS_I2S_TX_DATA;  in loongson_i2s_pci_probe()
111 	tx_data->order_addr = i2s->reg_base + LS_I2S_TX_ORDER;  in loongson_i2s_pci_probe()
113 	rx_data->dev_addr = pci_resource_start(pdev, 0) + LS_I2S_RX_DATA;  in loongson_i2s_pci_probe()
114 	rx_data->order_addr = i2s->reg_base + LS_I2S_RX_ORDER;  in loongson_i2s_pci_probe()
116 	tx_data->irq = fwnode_irq_get_byname(fwnode, "tx");  in loongson_i2s_pci_probe()
117 	if (tx_data->irq < 0)  in loongson_i2s_pci_probe()
118 		return dev_err_probe(dev, tx_data->irq, "dma tx irq invalid\n");  in loongson_i2s_pci_probe()
120 	rx_data->irq = fwnode_irq_get_byname(fwnode, "rx");  in loongson_i2s_pci_probe()
121 	if (rx_data->irq < 0)  in loongson_i2s_pci_probe()
122 		return dev_err_probe(dev, rx_data->irq, "dma rx irq invalid\n");  in loongson_i2s_pci_probe()
124 	ret = device_property_read_u32(dev, "clock-frequency", &i2s->clk_rate);  in loongson_i2s_pci_probe()
126 		return dev_err_probe(dev, ret, "clock-frequency property invalid\n");  in loongson_i2s_pci_probe()
130 	if (i2s->rev_id == 1) {  in loongson_i2s_pci_probe()
131 		regmap_write(i2s->regmap, LS_I2S_CTRL, I2S_CTRL_RESET);  in loongson_i2s_pci_probe()
150 	.name = "loongson-i2s-pci",
159 MODULE_DESCRIPTION("Loongson I2S Master Mode ASoC Driver");