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9#include <linux/module.h>
10#include <linux/delay.h>
11#include <linux/pm_runtime.h>
12#include <linux/dma-mapping.h>
13#include <linux/acpi.h>
14#include <linux/pci.h>
15#include <sound/soc.h>
16#include "loongson_i2s.h"
17#include "loongson_dma.h"
18
19#define DRIVER_NAME "loongson-i2s-pci"
20
21static bool loongson_i2s_wr_reg(struct device *dev, unsigned int reg)
22{
23 switch (reg) {
24 case LS_I2S_CFG:
25 case LS_I2S_CTRL:
26 case LS_I2S_RX_DATA:
27 case LS_I2S_TX_DATA:
28 case LS_I2S_CFG1:
29 return true;
30 default:
31 return false;
32 };
33}
34
35static bool loongson_i2s_rd_reg(struct device *dev, unsigned int reg)
36{
37 switch (reg) {
38 case LS_I2S_VER:
39 case LS_I2S_CFG:
40 case LS_I2S_CTRL:
41 case LS_I2S_RX_DATA:
42 case LS_I2S_TX_DATA:
43 case LS_I2S_CFG1:
44 return true;
45 default:
46 return false;
47 };
48}
49
50static bool loongson_i2s_volatile_reg(struct device *dev, unsigned int reg)
51{
52 switch (reg) {
53 case LS_I2S_CFG:
54 case LS_I2S_CTRL:
55 case LS_I2S_RX_DATA:
56 case LS_I2S_TX_DATA:
57 case LS_I2S_CFG1:
58 return true;
59 default:
60 return false;
61 };
62}
63
64static const struct regmap_config loongson_i2s_regmap_config = {
65 .reg_bits = 32,
66 .reg_stride = 4,
67 .val_bits = 32,
68 .max_register = LS_I2S_CFG1,
69 .writeable_reg = loongson_i2s_wr_reg,
70 .readable_reg = loongson_i2s_rd_reg,
71 .volatile_reg = loongson_i2s_volatile_reg,
72 .cache_type = REGCACHE_FLAT,
73};
74
75static int loongson_i2s_pci_probe(struct pci_dev *pdev,
76 const struct pci_device_id *pid)
77{
78 const struct fwnode_handle *fwnode = pdev->dev.fwnode;
79 struct loongson_dma_data *tx_data, *rx_data;
80 struct device *dev = &pdev->dev;
81 struct loongson_i2s *i2s;
82 int ret;
83
84 if (pcim_enable_device(pdev)) {
85 dev_err(dev, "pci_enable_device failed\n");
86 return -ENODEV;
87 }
88
89 i2s = devm_kzalloc(dev, sizeof(*i2s), GFP_KERNEL);
90 if (!i2s)
91 return -ENOMEM;
92
93 i2s->rev_id = pdev->revision;
94 i2s->dev = dev;
95 pci_set_drvdata(pdev, i2s);
96
97 i2s->reg_base = pcim_iomap_region(pdev, 0, DRIVER_NAME);
98 if (IS_ERR(i2s->reg_base)) {
99 dev_err(dev, "iomap_region failed\n");
100 return PTR_ERR(i2s->reg_base);
101 }
102
103 i2s->regmap = devm_regmap_init_mmio(dev, i2s->reg_base,
104 &loongson_i2s_regmap_config);
105 if (IS_ERR(i2s->regmap))
106 return dev_err_probe(dev, PTR_ERR(i2s->regmap), "regmap_init_mmio failed\n");
107
108 tx_data = &i2s->tx_dma_data;
109 rx_data = &i2s->rx_dma_data;
110
111 tx_data->dev_addr = pci_resource_start(pdev, 0) + LS_I2S_TX_DATA;
112 tx_data->order_addr = i2s->reg_base + LS_I2S_TX_ORDER;
113
114 rx_data->dev_addr = pci_resource_start(pdev, 0) + LS_I2S_RX_DATA;
115 rx_data->order_addr = i2s->reg_base + LS_I2S_RX_ORDER;
116
117 tx_data->irq = fwnode_irq_get_byname(fwnode, "tx");
118 if (tx_data->irq < 0)
119 return dev_err_probe(dev, tx_data->irq, "dma tx irq invalid\n");
120
121 rx_data->irq = fwnode_irq_get_byname(fwnode, "rx");
122 if (rx_data->irq < 0)
123 return dev_err_probe(dev, rx_data->irq, "dma rx irq invalid\n");
124
125 ret = device_property_read_u32(dev, "clock-frequency", &i2s->clk_rate);
126 if (ret)
127 return dev_err_probe(dev, ret, "clock-frequency property invalid\n");
128
129 dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64));
130
131 if (i2s->rev_id == 1) {
132 regmap_write(i2s->regmap, LS_I2S_CTRL, I2S_CTRL_RESET);
133 udelay(200);
134 }
135
136 ret = devm_snd_soc_register_component(dev, &loongson_i2s_component,
137 &loongson_i2s_dai, 1);
138 if (ret)
139 return dev_err_probe(dev, ret, "register DAI failed\n");
140
141 return 0;
142}
143
144static const struct pci_device_id loongson_i2s_ids[] = {
145 { PCI_DEVICE(PCI_VENDOR_ID_LOONGSON, 0x7a27) },
146 { },
147};
148MODULE_DEVICE_TABLE(pci, loongson_i2s_ids);
149
150static struct pci_driver loongson_i2s_driver = {
151 .name = DRIVER_NAME,
152 .id_table = loongson_i2s_ids,
153 .probe = loongson_i2s_pci_probe,
154 .driver = {
155 .pm = pm_sleep_ptr(&loongson_i2s_pm),
156 },
157};
158module_pci_driver(loongson_i2s_driver);
159
160MODULE_DESCRIPTION("Loongson I2S Master Mode ASoC Driver");
161MODULE_AUTHOR("Loongson Technology Corporation Limited");
162MODULE_LICENSE("GPL");
163
