6 * Copyright (C) 2007 OpenWrt.org
7 * Copyright (C) 2007 Gabor Juhos <juhosg at openwrt.org>
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License
11 * as published by the Free Software Foundation; either version 2
12 * of the License, or (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the
21 * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
22 * Boston, MA 02110-1301, USA.
26 #include <linux/autoconf.h>
27 #include <linux/init.h>
28 #include <linux/types.h>
29 #include <linux/module.h>
30 #include <linux/delay.h>
31 #include <linux/platform_device.h>
34 #include <asm/addrspace.h>
37 #include <adm5120_defs.h>
38 #include <adm5120_info.h>
39 #include <adm5120_switch.h>
42 #define GPIO_READ(r) readl((r))
43 #define GPIO_WRITE(v, r) writel((v), (r))
44 #define GPIO_REG(r) (void __iomem *)(KSEG1ADDR(ADM5120_SWITCH_BASE)+r)
46 struct adm5120_gpio_line
{
51 #define GPIO_FLAG_VALID 0x01
52 #define GPIO_FLAG_USED 0x02
55 void __iomem
*reg
; /* LED register address */
56 u8 iv_shift
; /* shift amount for input bit */
57 u8 mode_shift
; /* shift amount for mode bits */
60 #define LED_DESC(p, l) { \
61 .reg = GPIO_REG(SWITCH_REG_PORT0_LED+((p) * 4)), \
62 .iv_shift = LED0_IV_SHIFT + (l), \
63 .mode_shift = (l) * 4 \
66 static struct led_desc led_table
[15] = {
67 LED_DESC(0, 0), LED_DESC(0, 1), LED_DESC(0, 2),
68 LED_DESC(1, 0), LED_DESC(1, 1), LED_DESC(1, 2),
69 LED_DESC(2, 0), LED_DESC(2, 1), LED_DESC(2, 2),
70 LED_DESC(3, 0), LED_DESC(3, 1), LED_DESC(3, 2),
71 LED_DESC(4, 0), LED_DESC(4, 1), LED_DESC(4, 2)
74 static struct adm5120_gpio_line adm5120_gpio_map
[ADM5120_GPIO_COUNT
] = {
75 [ADM5120_GPIO_PIN0
] = {.flags
= GPIO_FLAG_VALID
},
76 [ADM5120_GPIO_PIN1
] = {.flags
= GPIO_FLAG_VALID
},
77 [ADM5120_GPIO_PIN2
] = {.flags
= GPIO_FLAG_VALID
},
78 [ADM5120_GPIO_PIN3
] = {.flags
= GPIO_FLAG_VALID
},
79 [ADM5120_GPIO_PIN4
] = {.flags
= GPIO_FLAG_VALID
},
80 [ADM5120_GPIO_PIN5
] = {.flags
= GPIO_FLAG_VALID
},
81 [ADM5120_GPIO_PIN6
] = {.flags
= GPIO_FLAG_VALID
},
82 [ADM5120_GPIO_PIN7
] = {.flags
= GPIO_FLAG_VALID
},
83 [ADM5120_GPIO_P0L0
] = {.flags
= GPIO_FLAG_VALID
},
84 [ADM5120_GPIO_P0L1
] = {.flags
= GPIO_FLAG_VALID
},
85 [ADM5120_GPIO_P0L2
] = {.flags
= GPIO_FLAG_VALID
},
86 [ADM5120_GPIO_P1L0
] = {.flags
= GPIO_FLAG_VALID
},
87 [ADM5120_GPIO_P1L1
] = {.flags
= GPIO_FLAG_VALID
},
88 [ADM5120_GPIO_P1L2
] = {.flags
= GPIO_FLAG_VALID
},
89 [ADM5120_GPIO_P2L0
] = {.flags
= GPIO_FLAG_VALID
},
90 [ADM5120_GPIO_P2L1
] = {.flags
= GPIO_FLAG_VALID
},
91 [ADM5120_GPIO_P2L2
] = {.flags
= GPIO_FLAG_VALID
},
92 [ADM5120_GPIO_P3L0
] = {.flags
= GPIO_FLAG_VALID
},
93 [ADM5120_GPIO_P3L1
] = {.flags
= GPIO_FLAG_VALID
},
94 [ADM5120_GPIO_P3L2
] = {.flags
= GPIO_FLAG_VALID
},
95 [ADM5120_GPIO_P4L0
] = {.flags
= GPIO_FLAG_VALID
},
96 [ADM5120_GPIO_P4L1
] = {.flags
= GPIO_FLAG_VALID
},
97 [ADM5120_GPIO_P4L2
] = {.flags
= GPIO_FLAG_VALID
}
100 #define gpio_is_invalid(g) ((g) > ADM5120_GPIO_MAX || \
101 ((adm5120_gpio_map[(g)].flags & GPIO_FLAG_VALID) == 0))
103 #define gpio_is_used(g) ((adm5120_gpio_map[(g)].flags & GPIO_FLAG_USED) != 0)
106 * Helpers for GPIO lines in GPIO_CONF0 register
108 #define PIN_IM(p) ((1 << GPIO_CONF0_IM_SHIFT) << p)
109 #define PIN_IV(p) ((1 << GPIO_CONF0_IV_SHIFT) << p)
110 #define PIN_OE(p) ((1 << GPIO_CONF0_OE_SHIFT) << p)
111 #define PIN_OV(p) ((1 << GPIO_CONF0_OV_SHIFT) << p)
113 static inline int pins_direction_input(unsigned pin
)
118 reg
= GPIO_REG(SWITCH_REG_GPIO_CONF0
);
128 static inline int pins_direction_output(unsigned pin
, int value
)
133 reg
= GPIO_REG(SWITCH_REG_GPIO_CONF0
);
136 t
&= ~(PIN_IM(pin
) | PIN_OV(pin
));
147 static inline int pins_get_value(unsigned pin
)
152 reg
= GPIO_REG(SWITCH_REG_GPIO_CONF0
);
155 if ((t
& PIN_IM(pin
)) != 0)
163 static inline void pins_set_value(unsigned pin
, int value
)
168 reg
= GPIO_REG(SWITCH_REG_GPIO_CONF0
);
180 * Helpers for GPIO lines in PORTx_LED registers
182 static inline int leds_direction_input(unsigned led
)
187 reg
= led_table
[led
].reg
;
189 t
&= ~(LED_MODE_MASK
<< led_table
[led
].mode_shift
);
195 static inline int leds_direction_output(unsigned led
, int value
)
200 reg
= led_table
[led
].reg
;
201 s
= led_table
[led
].mode_shift
;
204 t
&= ~(LED_MODE_MASK
<< s
);
207 case ADM5120_GPIO_LOW
:
208 t
|= (LED_MODE_OUT_LOW
<< s
);
210 case ADM5120_GPIO_FLASH
:
211 case ADM5120_GPIO_LINK
:
212 case ADM5120_GPIO_SPEED
:
213 case ADM5120_GPIO_DUPLEX
:
214 case ADM5120_GPIO_ACT
:
215 case ADM5120_GPIO_COLL
:
216 case ADM5120_GPIO_LINK_ACT
:
217 case ADM5120_GPIO_DUPLEX_COLL
:
218 case ADM5120_GPIO_10M_ACT
:
219 case ADM5120_GPIO_100M_ACT
:
220 t
|= ((value
& LED_MODE_MASK
) << s
);
223 t
|= (LED_MODE_OUT_HIGH
<< s
);
232 static inline int leds_get_value(unsigned led
)
237 reg
= led_table
[led
].reg
;
240 m
= (t
>> led_table
[led
].mode_shift
) & LED_MODE_MASK
;
241 if (m
== LED_MODE_INPUT
)
242 return (t
>> led_table
[led
].iv_shift
) & 1;
244 if (m
== LED_MODE_OUT_LOW
)
251 * Main GPIO support routines
253 int adm5120_gpio_direction_input(unsigned gpio
)
255 if (gpio_is_invalid(gpio
))
258 if (gpio
< ADM5120_GPIO_P0L0
)
259 return pins_direction_input(gpio
);
261 gpio
-= ADM5120_GPIO_P0L0
;
262 return leds_direction_input(gpio
);
264 EXPORT_SYMBOL(adm5120_gpio_direction_input
);
266 int adm5120_gpio_direction_output(unsigned gpio
, int value
)
268 if (gpio_is_invalid(gpio
))
271 if (gpio
< ADM5120_GPIO_P0L0
)
272 return pins_direction_output(gpio
, value
);
274 gpio
-= ADM5120_GPIO_P0L0
;
275 return leds_direction_output(gpio
, value
);
277 EXPORT_SYMBOL(adm5120_gpio_direction_output
);
279 int adm5120_gpio_get_value(unsigned gpio
)
281 if (gpio
< ADM5120_GPIO_P0L0
)
282 return pins_get_value(gpio
);
284 gpio
-= ADM5120_GPIO_P0L0
;
285 return leds_get_value(gpio
);
287 EXPORT_SYMBOL(adm5120_gpio_get_value
);
289 void adm5120_gpio_set_value(unsigned gpio
, int value
)
291 if (gpio
< ADM5120_GPIO_P0L0
) {
292 pins_set_value(gpio
, value
);
296 gpio
-= ADM5120_GPIO_P0L0
;
297 leds_direction_output(gpio
, value
);
299 EXPORT_SYMBOL(adm5120_gpio_set_value
);
301 int adm5120_gpio_request(unsigned gpio
, const char *label
)
303 if (gpio_is_invalid(gpio
))
306 if (gpio_is_used(gpio
))
309 adm5120_gpio_map
[gpio
].flags
|= GPIO_FLAG_USED
;
310 adm5120_gpio_map
[gpio
].label
= label
;
314 EXPORT_SYMBOL(adm5120_gpio_request
);
316 void adm5120_gpio_free(unsigned gpio
)
318 if (gpio_is_invalid(gpio
))
321 adm5120_gpio_map
[gpio
].flags
&= ~GPIO_FLAG_USED
;
322 adm5120_gpio_map
[gpio
].label
= NULL
;
324 EXPORT_SYMBOL(adm5120_gpio_free
);
326 int adm5120_gpio_to_irq(unsigned gpio
)
328 /* FIXME: not yet implemented */
331 EXPORT_SYMBOL(adm5120_gpio_to_irq
);
333 int adm5120_irq_to_gpio(unsigned irq
)
335 /* FIXME: not yet implemented */
338 EXPORT_SYMBOL(adm5120_irq_to_gpio
);
340 static int __init
adm5120_gpio_init(void)
344 if (adm5120_package_pqfp()) {
345 /* GPIO pins 4-7 are unavailable in ADM5120P */
346 for (i
= ADM5120_GPIO_PIN4
; i
<= ADM5120_GPIO_PIN7
; i
++)
347 adm5120_gpio_map
[i
].flags
&= ~GPIO_FLAG_VALID
;
353 pure_initcall(adm5120_gpio_init
);