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 /*-------------------------------------------------------------------------*/
79 static inline int gpio_is_invalid(unsigned gpio
)
81 if ((gpio
> ADM5120_GPIO_MAX
) ||
82 (adm5120_gpio_map
[gpio
].flags
& GPIO_FLAG_VALID
) == 0);
88 static inline int gpio_is_used(unsigned gpio
)
90 return ((adm5120_gpio_map
[gpio
].flags
& GPIO_FLAG_USED
) != 0);
93 /*-------------------------------------------------------------------------*/
96 * Helpers for GPIO lines in GPIO_CONF0 register
98 #define PIN_IM(p) ((1 << GPIO_CONF0_IM_SHIFT) << p)
99 #define PIN_IV(p) ((1 << GPIO_CONF0_IV_SHIFT) << p)
100 #define PIN_OE(p) ((1 << GPIO_CONF0_OE_SHIFT) << p)
101 #define PIN_OV(p) ((1 << GPIO_CONF0_OV_SHIFT) << p)
103 static inline int pins_direction_input(unsigned pin
)
108 reg
= GPIO_REG(SWITCH_REG_GPIO_CONF0
);
118 static inline int pins_direction_output(unsigned pin
, int value
)
123 reg
= GPIO_REG(SWITCH_REG_GPIO_CONF0
);
126 t
&= ~(PIN_IM(pin
) | PIN_OV(pin
));
137 static inline int pins_get_value(unsigned pin
)
142 reg
= GPIO_REG(SWITCH_REG_GPIO_CONF0
);
145 if ((t
& PIN_IM(pin
)) != 0)
153 static inline void pins_set_value(unsigned pin
, int value
)
158 reg
= GPIO_REG(SWITCH_REG_GPIO_CONF0
);
170 * Helpers for GPIO lines in PORTx_LED registers
172 static inline int leds_direction_input(unsigned led
)
177 reg
= led_table
[led
].reg
;
179 t
&= ~(LED_MODE_MASK
<< led_table
[led
].mode_shift
);
185 static inline int leds_direction_output(unsigned led
, int value
)
190 reg
= led_table
[led
].reg
;
191 s
= led_table
[led
].mode_shift
;
194 t
&= ~(LED_MODE_MASK
<< s
);
197 case ADM5120_GPIO_LOW
:
198 t
|= (LED_MODE_OUT_LOW
<< s
);
200 case ADM5120_GPIO_FLASH
:
201 case ADM5120_GPIO_LINK
:
202 case ADM5120_GPIO_SPEED
:
203 case ADM5120_GPIO_DUPLEX
:
204 case ADM5120_GPIO_ACT
:
205 case ADM5120_GPIO_COLL
:
206 case ADM5120_GPIO_LINK_ACT
:
207 case ADM5120_GPIO_DUPLEX_COLL
:
208 case ADM5120_GPIO_10M_ACT
:
209 case ADM5120_GPIO_100M_ACT
:
210 t
|= ((value
& LED_MODE_MASK
) << s
);
213 t
|= (LED_MODE_OUT_HIGH
<< s
);
222 static inline int leds_get_value(unsigned led
)
227 reg
= led_table
[led
].reg
;
230 m
= (t
>> led_table
[led
].mode_shift
) & LED_MODE_MASK
;
231 if (m
== LED_MODE_INPUT
)
232 return (t
>> led_table
[led
].iv_shift
) & 1;
234 if (m
== LED_MODE_OUT_LOW
)
240 /*-------------------------------------------------------------------------*/
243 * Main GPIO support routines
245 int adm5120_gpio_direction_input(unsigned gpio
)
247 if (gpio_is_invalid(gpio
))
250 if (gpio
< ADM5120_GPIO_P0L0
)
251 return pins_direction_input(gpio
);
253 gpio
-= ADM5120_GPIO_P0L0
;
254 return leds_direction_input(gpio
);
256 EXPORT_SYMBOL(adm5120_gpio_direction_input
);
258 int adm5120_gpio_direction_output(unsigned gpio
, int value
)
260 if (gpio_is_invalid(gpio
))
263 if (gpio
< ADM5120_GPIO_P0L0
)
264 return pins_direction_output(gpio
, value
);
266 gpio
-= ADM5120_GPIO_P0L0
;
267 return leds_direction_output(gpio
, value
);
269 EXPORT_SYMBOL(adm5120_gpio_direction_output
);
271 int adm5120_gpio_get_value(unsigned gpio
)
273 if (gpio
< ADM5120_GPIO_P0L0
)
274 return pins_get_value(gpio
);
276 gpio
-= ADM5120_GPIO_P0L0
;
277 return leds_get_value(gpio
);
279 EXPORT_SYMBOL(adm5120_gpio_get_value
);
281 void adm5120_gpio_set_value(unsigned gpio
, int value
)
283 if (gpio
< ADM5120_GPIO_P0L0
) {
284 pins_set_value(gpio
, value
);
288 gpio
-= ADM5120_GPIO_P0L0
;
289 leds_direction_output(gpio
, value
);
291 EXPORT_SYMBOL(adm5120_gpio_set_value
);
293 int adm5120_gpio_request(unsigned gpio
, const char *label
)
295 if (gpio_is_invalid(gpio
))
298 if (gpio_is_used(gpio
))
301 adm5120_gpio_map
[gpio
].flags
|= GPIO_FLAG_USED
;
302 adm5120_gpio_map
[gpio
].label
= label
;
306 EXPORT_SYMBOL(adm5120_gpio_request
);
308 void adm5120_gpio_free(unsigned gpio
)
310 if (gpio_is_invalid(gpio
))
313 adm5120_gpio_map
[gpio
].flags
&= ~GPIO_FLAG_USED
;
314 adm5120_gpio_map
[gpio
].label
= NULL
;
316 EXPORT_SYMBOL(adm5120_gpio_free
);
318 int adm5120_gpio_to_irq(unsigned gpio
)
320 if (gpio
> ADM5120_GPIO_MAX
)
323 return adm5120_gpio_map
[gpio
].irq
;
325 EXPORT_SYMBOL(adm5120_gpio_to_irq
);
327 int adm5120_irq_to_gpio(unsigned irq
)
331 for (i
= 0; i
< ADM5120_GPIO_COUNT
; i
++)
332 if (adm5120_gpio_map
[i
].irq
== irq
)
337 EXPORT_SYMBOL(adm5120_irq_to_gpio
);
339 /*-------------------------------------------------------------------------*/
341 void __init
adm5120_gpio_csx0_enable(void)
345 t
= SW_READ_REG(GPIO_CONF2
);
346 t
|= GPIO_CONF2_CSX0
;
347 SW_WRITE_REG(GPIO_CONF2
, t
);
349 adm5120_gpio_map
[ADM5120_GPIO_PIN1
].flags
&= ~GPIO_FLAG_VALID
;
350 adm5120_gpio_map
[ADM5120_GPIO_PIN2
].irq
= ADM5120_IRQ_GPIO2
;
353 void __init
adm5120_gpio_csx1_enable(void)
357 t
= SW_READ_REG(GPIO_CONF2
);
358 t
|= GPIO_CONF2_CSX1
;
359 SW_WRITE_REG(GPIO_CONF2
, t
);
361 adm5120_gpio_map
[ADM5120_GPIO_PIN3
].flags
&= ~GPIO_FLAG_VALID
;
362 if (adm5120_package_bga())
363 adm5120_gpio_map
[ADM5120_GPIO_PIN4
].irq
= ADM5120_IRQ_GPIO4
;
366 void __init
adm5120_gpio_ew_enable(void)
370 t
= SW_READ_REG(GPIO_CONF2
);
372 SW_WRITE_REG(GPIO_CONF2
, t
);
375 void __init
adm5120_gpio_init(void)
379 SW_WRITE_REG(GPIO_CONF2
, 0);
381 for (i
= 0; i
< ADM5120_GPIO_COUNT
; i
++)
382 adm5120_gpio_map
[i
].flags
= GPIO_FLAG_VALID
;
384 if (adm5120_package_pqfp()) {
385 adm5120_gpio_map
[ADM5120_GPIO_PIN4
].flags
&= ~GPIO_FLAG_VALID
;
386 adm5120_gpio_map
[ADM5120_GPIO_PIN5
].flags
&= ~GPIO_FLAG_VALID
;
387 adm5120_gpio_map
[ADM5120_GPIO_PIN6
].flags
&= ~GPIO_FLAG_VALID
;
388 adm5120_gpio_map
[ADM5120_GPIO_PIN7
].flags
&= ~GPIO_FLAG_VALID
;