3 // loongson_i2s_pci.c -- Loongson I2S controller driver
19 #define DRIVER_NAME "loongson-i2s-pci"
81 	struct loongson_i2s *i2s;  in loongson_i2s_pci_probe()  local
89 	i2s = devm_kzalloc(dev, sizeof(*i2s), GFP_KERNEL);  in loongson_i2s_pci_probe()
90 	if (!i2s)  in loongson_i2s_pci_probe()
93 	i2s->rev_id = pdev->revision;  in loongson_i2s_pci_probe()
94 	i2s->dev = dev;  in loongson_i2s_pci_probe()
95 	pci_set_drvdata(pdev, i2s);  in loongson_i2s_pci_probe()
97 	i2s->reg_base = pcim_iomap_region(pdev, 0, DRIVER_NAME);  in loongson_i2s_pci_probe()
98 	if (IS_ERR(i2s->reg_base)) {  in loongson_i2s_pci_probe()
100 		return PTR_ERR(i2s->reg_base);  in loongson_i2s_pci_probe()
103 	i2s->regmap = devm_regmap_init_mmio(dev, i2s->reg_base,  in loongson_i2s_pci_probe()
105 	if (IS_ERR(i2s->regmap))  in loongson_i2s_pci_probe()
106 		return dev_err_probe(dev, PTR_ERR(i2s->regmap), "regmap_init_mmio failed\n");  in loongson_i2s_pci_probe()
108 	tx_data = &i2s->tx_dma_data;  in loongson_i2s_pci_probe()
109 	rx_data = &i2s->rx_dma_data;  in loongson_i2s_pci_probe()
112 	tx_data->order_addr = i2s->reg_base + LS_I2S_TX_ORDER;  in loongson_i2s_pci_probe()
115 	rx_data->order_addr = i2s->reg_base + LS_I2S_RX_ORDER;  in loongson_i2s_pci_probe()
125 	ret = device_property_read_u32(dev, "clock-frequency", &i2s->clk_rate);  in loongson_i2s_pci_probe()
131 	if (i2s->rev_id == 1) {  in loongson_i2s_pci_probe()
132 		regmap_write(i2s->regmap, LS_I2S_CTRL, I2S_CTRL_RESET);  in loongson_i2s_pci_probe()
160 MODULE_DESCRIPTION("Loongson I2S Master Mode ASoC Driver");