This source file includes following definitions.
- pcaled_match
- pcaled_attach
- pcaled_gpio_pin_read
- pcaled_gpio_pin_write
- pcaled_gpio_pin_ctl
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18 #include <sys/param.h>
19 #include <sys/systm.h>
20 #include <sys/device.h>
21 #include <sys/kernel.h>
22 #include <sys/fcntl.h>
23 #include <sys/uio.h>
24 #include <sys/conf.h>
25 #include <sys/gpio.h>
26
27
28 #include <dev/i2c/i2cvar.h>
29 #include <dev/gpio/gpiovar.h>
30
31 #include "gpio.h"
32
33
34
35 #define PCALED_ADDR 0x60
36
37 #define PCALED_GPIO_NPINS 16
38
39 struct pcaled_softc {
40 struct device sc_dev;
41 i2c_tag_t sc_tag;
42 int sc_addr;
43 struct gpio_chipset_tag sc_gpio_gc;
44 struct gpio_pin sc_gpio_pin[PCALED_GPIO_NPINS];
45
46 };
47
48 int pcaled_match(struct device *, void *, void *);
49 void pcaled_attach(struct device *, struct device *, void *);
50 int pcaled_gpio_pin_read(void *arg, int pin);
51 void pcaled_gpio_pin_write (void *arg, int pin, int value);
52 void pcaled_gpio_pin_ctl (void *arg, int pin, int flags);
53
54 struct cfattach pcaled_ca = {
55 sizeof(struct pcaled_softc), pcaled_match, pcaled_attach
56 };
57
58 struct cfdriver pcaled_cd = {
59 NULL, "pcaled", DV_DULL
60 };
61
62 int
63 pcaled_match(struct device *parent, void *v, void *arg)
64 {
65 struct i2c_attach_args *ia = arg;
66 int ok = 0;
67 uint8_t cmd, data;
68
69 if (ia->ia_addr != PCALED_ADDR)
70 return (0);
71
72 iic_acquire_bus(ia->ia_tag, I2C_F_POLL);
73 cmd = 0;
74 if (iic_exec(ia->ia_tag, I2C_OP_READ_WITH_STOP, ia->ia_addr,
75 &cmd, 1, &data, 1, I2C_F_POLL))
76 goto fail;
77 cmd = 9;
78 if (iic_exec(ia->ia_tag, I2C_OP_READ_WITH_STOP, ia->ia_addr,
79 &cmd, 1, &data, 1, I2C_F_POLL))
80 goto fail;
81 ok = 1;
82 fail:
83 iic_release_bus(ia->ia_tag, I2C_F_POLL);
84 return (ok);
85 }
86
87 void
88 pcaled_attach(struct device *parent, struct device *self, void *arg)
89 {
90 struct pcaled_softc *sc = (void *)self;
91 struct i2c_attach_args *ia = arg;
92 struct gpiobus_attach_args gba;
93 int i;
94 uint8_t cmd, data;
95
96 sc->sc_tag = ia->ia_tag;
97 sc->sc_addr = ia->ia_addr;
98
99 iic_acquire_bus(sc->sc_tag, I2C_F_POLL);
100
101 for (i = 0; i < PCALED_GPIO_NPINS; i++) {
102 sc->sc_gpio_pin[i].pin_num = i;
103 sc->sc_gpio_pin[i].pin_caps = GPIO_PIN_INOUT;
104 if (i < 8)
105 cmd = 0;
106 else
107 cmd = 1;
108 if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP, sc->sc_addr,
109 &cmd, 1, &data, 1, I2C_F_POLL))
110 goto fail;
111 sc->sc_gpio_pin[i].pin_state = (data >> (i & 3)) & 1;
112 }
113 sc->sc_gpio_gc.gp_cookie = sc;
114 sc->sc_gpio_gc.gp_pin_read = pcaled_gpio_pin_read;
115 sc->sc_gpio_gc.gp_pin_write = pcaled_gpio_pin_write;
116 sc->sc_gpio_gc.gp_pin_ctl = pcaled_gpio_pin_ctl;
117
118 printf(": PCA9532 LED controller\n");
119
120 gba.gba_name = "gpio";
121 gba.gba_gc = &sc->sc_gpio_gc;
122 gba.gba_pins = sc->sc_gpio_pin;
123 gba.gba_npins = PCALED_GPIO_NPINS;
124 #if NGPIO > 0
125 config_found(&sc->sc_dev, &gba, gpiobus_print);
126 #endif
127
128 fail:
129 iic_release_bus(sc->sc_tag, I2C_F_POLL);
130 }
131
132 int
133 pcaled_gpio_pin_read(void *arg, int pin)
134 {
135 struct pcaled_softc *sc = arg;
136 iic_acquire_bus(sc->sc_tag, I2C_F_POLL);
137 uint8_t cmd, data;
138
139 if (pin < 8)
140 cmd = 0;
141 else
142 cmd = 1;
143 if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP, sc->sc_addr,
144 &cmd, 1, &data, 1, I2C_F_POLL))
145 goto fail;
146
147 fail:
148 iic_release_bus(sc->sc_tag, I2C_F_POLL);
149 return (data >> (pin & 3)) & 1;
150 }
151
152 void
153 pcaled_gpio_pin_write (void *arg, int pin, int value)
154 {
155 struct pcaled_softc *sc = arg;
156 uint8_t cmd, data;
157 if (pin < 4)
158 cmd = 6;
159 else if (pin < 8)
160 cmd = 7;
161 else if (pin < 12)
162 cmd = 8;
163 else
164 cmd = 9;
165 if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP, sc->sc_addr,
166 &cmd, 1, &data, 1, I2C_F_POLL))
167 goto fail;
168 data &= ~(0x3 << (2*(pin & 3)));
169 data |= (value << (2*(pin & 3)));
170
171 if (iic_exec(sc->sc_tag, I2C_OP_WRITE_WITH_STOP, sc->sc_addr,
172 &cmd, 1, &data, 1, I2C_F_POLL))
173 goto fail;
174
175 fail:
176 iic_release_bus(sc->sc_tag, I2C_F_POLL);
177 }
178
179 void
180 pcaled_gpio_pin_ctl (void *arg, int pin, int flags)
181 {
182
183 }
184