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>
40 #include <adm5120_irq.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
{
52 #define GPIO_FLAG_VALID 0x01
53 #define GPIO_FLAG_USED 0x02
56 void __iomem
*reg
; /* LED register address */
57 u8 iv_shift
; /* shift amount for input bit */
58 u8 mode_shift
; /* shift amount for mode bits */
61 #define LED_DESC(p, l) { \
62 .reg = GPIO_REG(SWITCH_REG_PORT0_LED+((p) * 4)), \
63 .iv_shift = LED0_IV_SHIFT + (l), \
64 .mode_shift = (l) * 4 \
67 static struct led_desc led_table
[15] = {
68 LED_DESC(0, 0), LED_DESC(0, 1), LED_DESC(0, 2),
69 LED_DESC(1, 0), LED_DESC(1, 1), LED_DESC(1, 2),
70 LED_DESC(2, 0), LED_DESC(2, 1), LED_DESC(2, 2),
71 LED_DESC(3, 0), LED_DESC(3, 1), LED_DESC(3, 2),
72 LED_DESC(4, 0), LED_DESC(4, 1), LED_DESC(4, 2)
75 static struct adm5120_gpio_line adm5120_gpio_map
[ADM5120_GPIO_COUNT
];
77 static u32 gpio_conf2
;
79 /*-------------------------------------------------------------------------*/
81 static inline int gpio_is_invalid(unsigned gpio
)
83 if ((gpio
> ADM5120_GPIO_MAX
) ||
84 (adm5120_gpio_map
[gpio
].flags
& GPIO_FLAG_VALID
) == 0);
90 static inline int gpio_is_used(unsigned gpio
)
92 return ((adm5120_gpio_map
[gpio
].flags
& GPIO_FLAG_USED
) != 0);
95 /*-------------------------------------------------------------------------*/
98 * Helpers for GPIO lines in GPIO_CONF0 register
100 #define PIN_IM(p) ((1 << GPIO_CONF0_IM_SHIFT) << p)
101 #define PIN_IV(p) ((1 << GPIO_CONF0_IV_SHIFT) << p)
102 #define PIN_OE(p) ((1 << GPIO_CONF0_OE_SHIFT) << p)
103 #define PIN_OV(p) ((1 << GPIO_CONF0_OV_SHIFT) << p)
105 static inline int pins_direction_input(unsigned pin
)
110 reg
= GPIO_REG(SWITCH_REG_GPIO_CONF0
);
120 static inline int pins_direction_output(unsigned pin
, int value
)
125 reg
= GPIO_REG(SWITCH_REG_GPIO_CONF0
);
128 t
&= ~(PIN_IM(pin
) | PIN_OV(pin
));
139 static inline int pins_get_value(unsigned pin
)
144 reg
= GPIO_REG(SWITCH_REG_GPIO_CONF0
);
147 if ((t
& PIN_IM(pin
)) != 0)
155 static inline void pins_set_value(unsigned pin
, int value
)
160 reg
= GPIO_REG(SWITCH_REG_GPIO_CONF0
);
172 * Helpers for GPIO lines in PORTx_LED registers
174 static inline int leds_direction_input(unsigned led
)
179 reg
= led_table
[led
].reg
;
181 t
&= ~(LED_MODE_MASK
<< led_table
[led
].mode_shift
);
187 static inline int leds_direction_output(unsigned led
, int value
)
192 reg
= led_table
[led
].reg
;
193 s
= led_table
[led
].mode_shift
;
196 t
&= ~(LED_MODE_MASK
<< s
);
199 case ADM5120_GPIO_LOW
:
200 t
|= (LED_MODE_OUT_LOW
<< s
);
202 case ADM5120_GPIO_FLASH
:
203 case ADM5120_GPIO_LINK
:
204 case ADM5120_GPIO_SPEED
:
205 case ADM5120_GPIO_DUPLEX
:
206 case ADM5120_GPIO_ACT
:
207 case ADM5120_GPIO_COLL
:
208 case ADM5120_GPIO_LINK_ACT
:
209 case ADM5120_GPIO_DUPLEX_COLL
:
210 case ADM5120_GPIO_10M_ACT
:
211 case ADM5120_GPIO_100M_ACT
:
212 t
|= ((value
& LED_MODE_MASK
) << s
);
215 t
|= (LED_MODE_OUT_HIGH
<< s
);
224 static inline int leds_get_value(unsigned led
)
229 reg
= led_table
[led
].reg
;
232 m
= (t
>> led_table
[led
].mode_shift
) & LED_MODE_MASK
;
233 if (m
== LED_MODE_INPUT
)
234 return (t
>> led_table
[led
].iv_shift
) & 1;
236 if (m
== LED_MODE_OUT_LOW
)
242 /*-------------------------------------------------------------------------*/
245 * Main GPIO support routines
247 int adm5120_gpio_direction_input(unsigned gpio
)
249 if (gpio_is_invalid(gpio
))
252 if (gpio
< ADM5120_GPIO_P0L0
)
253 return pins_direction_input(gpio
);
255 gpio
-= ADM5120_GPIO_P0L0
;
256 return leds_direction_input(gpio
);
258 EXPORT_SYMBOL(adm5120_gpio_direction_input
);
260 int adm5120_gpio_direction_output(unsigned gpio
, int value
)
262 if (gpio_is_invalid(gpio
))
265 if (gpio
< ADM5120_GPIO_P0L0
)
266 return pins_direction_output(gpio
, value
);
268 gpio
-= ADM5120_GPIO_P0L0
;
269 return leds_direction_output(gpio
, value
);
271 EXPORT_SYMBOL(adm5120_gpio_direction_output
);
273 int adm5120_gpio_get_value(unsigned gpio
)
275 if (gpio
< ADM5120_GPIO_P0L0
)
276 return pins_get_value(gpio
);
278 gpio
-= ADM5120_GPIO_P0L0
;
279 return leds_get_value(gpio
);
281 EXPORT_SYMBOL(adm5120_gpio_get_value
);
283 void adm5120_gpio_set_value(unsigned gpio
, int value
)
285 if (gpio
< ADM5120_GPIO_P0L0
) {
286 pins_set_value(gpio
, value
);
290 gpio
-= ADM5120_GPIO_P0L0
;
291 leds_direction_output(gpio
, value
);
293 EXPORT_SYMBOL(adm5120_gpio_set_value
);
295 int adm5120_gpio_request(unsigned gpio
, const char *label
)
297 if (gpio_is_invalid(gpio
))
300 if (gpio_is_used(gpio
))
303 adm5120_gpio_map
[gpio
].flags
|= GPIO_FLAG_USED
;
304 adm5120_gpio_map
[gpio
].label
= label
;
308 EXPORT_SYMBOL(adm5120_gpio_request
);
310 void adm5120_gpio_free(unsigned gpio
)
312 if (gpio_is_invalid(gpio
))
315 adm5120_gpio_map
[gpio
].flags
&= ~GPIO_FLAG_USED
;
316 adm5120_gpio_map
[gpio
].label
= NULL
;
318 EXPORT_SYMBOL(adm5120_gpio_free
);
320 int adm5120_gpio_to_irq(unsigned gpio
)
322 if (gpio
> ADM5120_GPIO_MAX
)
325 return adm5120_gpio_map
[gpio
].irq
;
327 EXPORT_SYMBOL(adm5120_gpio_to_irq
);
329 int adm5120_irq_to_gpio(unsigned irq
)
333 for (i
= 0; i
< ADM5120_GPIO_COUNT
; i
++)
334 if (adm5120_gpio_map
[i
].irq
== irq
)
339 EXPORT_SYMBOL(adm5120_irq_to_gpio
);
341 /*-------------------------------------------------------------------------*/
343 void __init
adm5120_gpio_csx0_enable(void)
345 gpio_conf2
|= GPIO_CONF2_CSX0
;
346 SW_WRITE_REG(GPIO_CONF2
, gpio_conf2
);
348 adm5120_gpio_map
[ADM5120_GPIO_PIN1
].flags
&= ~GPIO_FLAG_VALID
;
349 adm5120_gpio_map
[ADM5120_GPIO_PIN2
].irq
= ADM5120_IRQ_GPIO2
;
352 void __init
adm5120_gpio_csx1_enable(void)
354 gpio_conf2
|= GPIO_CONF2_CSX1
;
355 SW_WRITE_REG(GPIO_CONF2
, gpio_conf2
);
357 adm5120_gpio_map
[ADM5120_GPIO_PIN3
].flags
&= ~GPIO_FLAG_VALID
;
358 if (adm5120_package_bga())
359 adm5120_gpio_map
[ADM5120_GPIO_PIN4
].irq
= ADM5120_IRQ_GPIO4
;
362 void __init
adm5120_gpio_ew_enable(void)
364 gpio_conf2
|= GPIO_CONF2_EW
;
365 SW_WRITE_REG(GPIO_CONF2
, gpio_conf2
);
367 adm5120_gpio_map
[ADM5120_GPIO_PIN0
].flags
&= ~GPIO_FLAG_VALID
;
370 void __init
adm5120_gpio_init(void)
375 SW_WRITE_REG(GPIO_CONF2
, gpio_conf2
);
377 for (i
= 0; i
< ADM5120_GPIO_COUNT
; i
++)
378 adm5120_gpio_map
[i
].flags
= GPIO_FLAG_VALID
;
380 if (adm5120_package_pqfp()) {
381 adm5120_gpio_map
[ADM5120_GPIO_PIN4
].flags
&= ~GPIO_FLAG_VALID
;
382 adm5120_gpio_map
[ADM5120_GPIO_PIN5
].flags
&= ~GPIO_FLAG_VALID
;
383 adm5120_gpio_map
[ADM5120_GPIO_PIN6
].flags
&= ~GPIO_FLAG_VALID
;
384 adm5120_gpio_map
[ADM5120_GPIO_PIN7
].flags
&= ~GPIO_FLAG_VALID
;