This source file includes following definitions.
- tusb1210_power_on
- tusb1210_power_off
- tusb1210_set_mode
- tusb1210_probe
- tusb1210_remove
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8
9 #include <linux/module.h>
10 #include <linux/ulpi/driver.h>
11 #include <linux/ulpi/regs.h>
12 #include <linux/gpio/consumer.h>
13 #include <linux/phy/ulpi_phy.h>
14
15 #define TUSB1210_VENDOR_SPECIFIC2 0x80
16 #define TUSB1210_VENDOR_SPECIFIC2_IHSTX_SHIFT 0
17 #define TUSB1210_VENDOR_SPECIFIC2_ZHSDRV_SHIFT 4
18 #define TUSB1210_VENDOR_SPECIFIC2_DP_SHIFT 6
19
20 struct tusb1210 {
21 struct ulpi *ulpi;
22 struct phy *phy;
23 struct gpio_desc *gpio_reset;
24 struct gpio_desc *gpio_cs;
25 u8 vendor_specific2;
26 };
27
28 static int tusb1210_power_on(struct phy *phy)
29 {
30 struct tusb1210 *tusb = phy_get_drvdata(phy);
31
32 gpiod_set_value_cansleep(tusb->gpio_reset, 1);
33 gpiod_set_value_cansleep(tusb->gpio_cs, 1);
34
35
36 if (tusb->vendor_specific2)
37 ulpi_write(tusb->ulpi, TUSB1210_VENDOR_SPECIFIC2,
38 tusb->vendor_specific2);
39
40 return 0;
41 }
42
43 static int tusb1210_power_off(struct phy *phy)
44 {
45 struct tusb1210 *tusb = phy_get_drvdata(phy);
46
47 gpiod_set_value_cansleep(tusb->gpio_reset, 0);
48 gpiod_set_value_cansleep(tusb->gpio_cs, 0);
49
50 return 0;
51 }
52
53 static int tusb1210_set_mode(struct phy *phy, enum phy_mode mode, int submode)
54 {
55 struct tusb1210 *tusb = phy_get_drvdata(phy);
56 int ret;
57
58 ret = ulpi_read(tusb->ulpi, ULPI_OTG_CTRL);
59 if (ret < 0)
60 return ret;
61
62 switch (mode) {
63 case PHY_MODE_USB_HOST:
64 ret |= (ULPI_OTG_CTRL_DRVVBUS_EXT
65 | ULPI_OTG_CTRL_ID_PULLUP
66 | ULPI_OTG_CTRL_DP_PULLDOWN
67 | ULPI_OTG_CTRL_DM_PULLDOWN);
68 ulpi_write(tusb->ulpi, ULPI_OTG_CTRL, ret);
69 ret |= ULPI_OTG_CTRL_DRVVBUS;
70 break;
71 case PHY_MODE_USB_DEVICE:
72 ret &= ~(ULPI_OTG_CTRL_DRVVBUS
73 | ULPI_OTG_CTRL_DP_PULLDOWN
74 | ULPI_OTG_CTRL_DM_PULLDOWN);
75 ulpi_write(tusb->ulpi, ULPI_OTG_CTRL, ret);
76 ret &= ~ULPI_OTG_CTRL_DRVVBUS_EXT;
77 break;
78 default:
79
80 return 0;
81 }
82
83 return ulpi_write(tusb->ulpi, ULPI_OTG_CTRL, ret);
84 }
85
86 static const struct phy_ops phy_ops = {
87 .power_on = tusb1210_power_on,
88 .power_off = tusb1210_power_off,
89 .set_mode = tusb1210_set_mode,
90 .owner = THIS_MODULE,
91 };
92
93 static int tusb1210_probe(struct ulpi *ulpi)
94 {
95 struct tusb1210 *tusb;
96 u8 val, reg;
97
98 tusb = devm_kzalloc(&ulpi->dev, sizeof(*tusb), GFP_KERNEL);
99 if (!tusb)
100 return -ENOMEM;
101
102 tusb->gpio_reset = devm_gpiod_get_optional(&ulpi->dev, "reset",
103 GPIOD_OUT_LOW);
104 if (IS_ERR(tusb->gpio_reset))
105 return PTR_ERR(tusb->gpio_reset);
106
107 gpiod_set_value_cansleep(tusb->gpio_reset, 1);
108
109 tusb->gpio_cs = devm_gpiod_get_optional(&ulpi->dev, "cs",
110 GPIOD_OUT_LOW);
111 if (IS_ERR(tusb->gpio_cs))
112 return PTR_ERR(tusb->gpio_cs);
113
114 gpiod_set_value_cansleep(tusb->gpio_cs, 1);
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122 device_property_read_u8(&ulpi->dev, "ihstx", &val);
123 reg = val << TUSB1210_VENDOR_SPECIFIC2_IHSTX_SHIFT;
124
125
126 device_property_read_u8(&ulpi->dev, "zhsdrv", &val);
127 reg |= val << TUSB1210_VENDOR_SPECIFIC2_ZHSDRV_SHIFT;
128
129
130 device_property_read_u8(&ulpi->dev, "datapolarity", &val);
131 reg |= val << TUSB1210_VENDOR_SPECIFIC2_DP_SHIFT;
132
133 if (reg) {
134 ulpi_write(ulpi, TUSB1210_VENDOR_SPECIFIC2, reg);
135 tusb->vendor_specific2 = reg;
136 }
137
138 tusb->phy = ulpi_phy_create(ulpi, &phy_ops);
139 if (IS_ERR(tusb->phy))
140 return PTR_ERR(tusb->phy);
141
142 tusb->ulpi = ulpi;
143
144 phy_set_drvdata(tusb->phy, tusb);
145 ulpi_set_drvdata(ulpi, tusb);
146 return 0;
147 }
148
149 static void tusb1210_remove(struct ulpi *ulpi)
150 {
151 struct tusb1210 *tusb = ulpi_get_drvdata(ulpi);
152
153 ulpi_phy_destroy(ulpi, tusb->phy);
154 }
155
156 #define TI_VENDOR_ID 0x0451
157
158 static const struct ulpi_device_id tusb1210_ulpi_id[] = {
159 { TI_VENDOR_ID, 0x1507, },
160 { TI_VENDOR_ID, 0x1508, },
161 { },
162 };
163 MODULE_DEVICE_TABLE(ulpi, tusb1210_ulpi_id);
164
165 static struct ulpi_driver tusb1210_driver = {
166 .id_table = tusb1210_ulpi_id,
167 .probe = tusb1210_probe,
168 .remove = tusb1210_remove,
169 .driver = {
170 .name = "tusb1210",
171 .owner = THIS_MODULE,
172 },
173 };
174
175 module_ulpi_driver(tusb1210_driver);
176
177 MODULE_AUTHOR("Intel Corporation");
178 MODULE_LICENSE("GPL v2");
179 MODULE_DESCRIPTION("TUSB1210 ULPI PHY driver");