6 * Copyright (C) 2007-2008 OpenWrt.org
7 * Copyright (C) 2007-2008 Gabor Juhos <juhosg at openwrt.org>
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License version 2 as published
11 * by the Free Software Foundation.
15 #include <linux/autoconf.h>
16 #include <linux/init.h>
17 #include <linux/types.h>
18 #include <linux/module.h>
19 #include <linux/delay.h>
20 #include <linux/platform_device.h>
23 #include <asm/addrspace.h>
26 #include <adm5120_defs.h>
27 #include <adm5120_info.h>
28 #include <adm5120_switch.h>
29 #include <adm5120_irq.h>
31 #define GPIO_READ(r) __raw_readl((r))
32 #define GPIO_WRITE(v, r) __raw_writel((v), (r))
33 #define GPIO_REG(r) (void __iomem *)(KSEG1ADDR(ADM5120_SWITCH_BASE)+r)
35 struct adm5120_gpio_line
{
41 #define GPIO_FLAG_VALID 0x01
42 #define GPIO_FLAG_USED 0x02
45 void __iomem
*reg
; /* LED register address */
46 u8 iv_shift
; /* shift amount for input bit */
47 u8 mode_shift
; /* shift amount for mode bits */
50 #define LED_DESC(p, l) { \
51 .reg = GPIO_REG(SWITCH_REG_PORT0_LED+((p) * 4)), \
52 .iv_shift = LED0_IV_SHIFT + (l), \
53 .mode_shift = (l) * 4 \
56 static struct led_desc led_table
[15] = {
57 LED_DESC(0, 0), LED_DESC(0, 1), LED_DESC(0, 2),
58 LED_DESC(1, 0), LED_DESC(1, 1), LED_DESC(1, 2),
59 LED_DESC(2, 0), LED_DESC(2, 1), LED_DESC(2, 2),
60 LED_DESC(3, 0), LED_DESC(3, 1), LED_DESC(3, 2),
61 LED_DESC(4, 0), LED_DESC(4, 1), LED_DESC(4, 2)
64 static struct adm5120_gpio_line adm5120_gpio_map
[ADM5120_GPIO_COUNT
];
66 static u32 gpio_conf2
;
68 /*-------------------------------------------------------------------------*/
70 static inline int gpio_is_invalid(unsigned gpio
)
72 if ((gpio
> ADM5120_GPIO_MAX
) ||
73 (adm5120_gpio_map
[gpio
].flags
& GPIO_FLAG_VALID
) == 0)
79 static inline int gpio_is_used(unsigned gpio
)
81 return ((adm5120_gpio_map
[gpio
].flags
& GPIO_FLAG_USED
) != 0);
84 /*-------------------------------------------------------------------------*/
87 * Helpers for GPIO lines in GPIO_CONF0 register
89 #define PIN_IM(p) ((1 << GPIO_CONF0_IM_SHIFT) << p)
90 #define PIN_IV(p) ((1 << GPIO_CONF0_IV_SHIFT) << p)
91 #define PIN_OE(p) ((1 << GPIO_CONF0_OE_SHIFT) << p)
92 #define PIN_OV(p) ((1 << GPIO_CONF0_OV_SHIFT) << p)
94 static inline int pins_direction_input(unsigned pin
)
99 reg
= GPIO_REG(SWITCH_REG_GPIO_CONF0
);
109 static inline int pins_direction_output(unsigned pin
, int value
)
114 reg
= GPIO_REG(SWITCH_REG_GPIO_CONF0
);
117 t
&= ~(PIN_IM(pin
) | PIN_OV(pin
));
128 static inline int pins_get_value(unsigned pin
)
133 reg
= GPIO_REG(SWITCH_REG_GPIO_CONF0
);
136 if ((t
& PIN_IM(pin
)) != 0)
144 static inline void pins_set_value(unsigned pin
, int value
)
149 reg
= GPIO_REG(SWITCH_REG_GPIO_CONF0
);
161 * Helpers for GPIO lines in PORTx_LED registers
163 static inline int leds_direction_input(unsigned led
)
168 reg
= led_table
[led
].reg
;
170 t
&= ~(LED_MODE_MASK
<< led_table
[led
].mode_shift
);
176 static inline int leds_direction_output(unsigned led
, int value
)
181 reg
= led_table
[led
].reg
;
182 s
= led_table
[led
].mode_shift
;
185 t
&= ~(LED_MODE_MASK
<< s
);
188 case ADM5120_GPIO_LOW
:
189 t
|= (LED_MODE_OUT_LOW
<< s
);
191 case ADM5120_GPIO_FLASH
:
192 case ADM5120_GPIO_LINK
:
193 case ADM5120_GPIO_SPEED
:
194 case ADM5120_GPIO_DUPLEX
:
195 case ADM5120_GPIO_ACT
:
196 case ADM5120_GPIO_COLL
:
197 case ADM5120_GPIO_LINK_ACT
:
198 case ADM5120_GPIO_DUPLEX_COLL
:
199 case ADM5120_GPIO_10M_ACT
:
200 case ADM5120_GPIO_100M_ACT
:
201 t
|= ((value
& LED_MODE_MASK
) << s
);
204 t
|= (LED_MODE_OUT_HIGH
<< s
);
213 static inline int leds_get_value(unsigned led
)
218 reg
= led_table
[led
].reg
;
221 m
= (t
>> led_table
[led
].mode_shift
) & LED_MODE_MASK
;
222 if (m
== LED_MODE_INPUT
)
223 return (t
>> led_table
[led
].iv_shift
) & 1;
225 if (m
== LED_MODE_OUT_LOW
)
231 /*-------------------------------------------------------------------------*/
234 * Main GPIO support routines
236 int adm5120_gpio_direction_input(unsigned gpio
)
238 if (gpio_is_invalid(gpio
))
241 if (gpio
< ADM5120_GPIO_P0L0
)
242 return pins_direction_input(gpio
);
244 gpio
-= ADM5120_GPIO_P0L0
;
245 return leds_direction_input(gpio
);
247 EXPORT_SYMBOL(adm5120_gpio_direction_input
);
249 int adm5120_gpio_direction_output(unsigned gpio
, int value
)
251 if (gpio_is_invalid(gpio
))
254 if (gpio
< ADM5120_GPIO_P0L0
)
255 return pins_direction_output(gpio
, value
);
257 gpio
-= ADM5120_GPIO_P0L0
;
258 return leds_direction_output(gpio
, value
);
260 EXPORT_SYMBOL(adm5120_gpio_direction_output
);
262 int adm5120_gpio_get_value(unsigned gpio
)
264 if (gpio
< ADM5120_GPIO_P0L0
)
265 return pins_get_value(gpio
);
267 gpio
-= ADM5120_GPIO_P0L0
;
268 return leds_get_value(gpio
);
270 EXPORT_SYMBOL(adm5120_gpio_get_value
);
272 void adm5120_gpio_set_value(unsigned gpio
, int value
)
274 if (gpio
< ADM5120_GPIO_P0L0
) {
275 pins_set_value(gpio
, value
);
279 gpio
-= ADM5120_GPIO_P0L0
;
280 leds_direction_output(gpio
, value
);
282 EXPORT_SYMBOL(adm5120_gpio_set_value
);
284 int adm5120_gpio_request(unsigned gpio
, const char *label
)
286 if (gpio_is_invalid(gpio
))
289 if (gpio_is_used(gpio
))
292 adm5120_gpio_map
[gpio
].flags
|= GPIO_FLAG_USED
;
293 adm5120_gpio_map
[gpio
].label
= label
;
297 EXPORT_SYMBOL(adm5120_gpio_request
);
299 void adm5120_gpio_free(unsigned gpio
)
301 if (gpio_is_invalid(gpio
))
304 adm5120_gpio_map
[gpio
].flags
&= ~GPIO_FLAG_USED
;
305 adm5120_gpio_map
[gpio
].label
= NULL
;
307 EXPORT_SYMBOL(adm5120_gpio_free
);
309 int adm5120_gpio_to_irq(unsigned gpio
)
311 if (gpio
> ADM5120_GPIO_MAX
)
314 return adm5120_gpio_map
[gpio
].irq
;
316 EXPORT_SYMBOL(adm5120_gpio_to_irq
);
318 int adm5120_irq_to_gpio(unsigned irq
)
322 for (i
= 0; i
< ADM5120_GPIO_COUNT
; i
++)
323 if (adm5120_gpio_map
[i
].irq
== irq
)
328 EXPORT_SYMBOL(adm5120_irq_to_gpio
);
330 /*-------------------------------------------------------------------------*/
332 void __init
adm5120_gpio_csx0_enable(void)
334 gpio_conf2
|= GPIO_CONF2_CSX0
;
335 SW_WRITE_REG(SWITCH_REG_GPIO_CONF2
, gpio_conf2
);
337 adm5120_gpio_map
[ADM5120_GPIO_PIN1
].flags
&= ~GPIO_FLAG_VALID
;
338 adm5120_gpio_map
[ADM5120_GPIO_PIN2
].irq
= ADM5120_IRQ_GPIO2
;
341 void __init
adm5120_gpio_csx1_enable(void)
343 gpio_conf2
|= GPIO_CONF2_CSX1
;
344 SW_WRITE_REG(SWITCH_REG_GPIO_CONF2
, gpio_conf2
);
346 adm5120_gpio_map
[ADM5120_GPIO_PIN3
].flags
&= ~GPIO_FLAG_VALID
;
347 if (adm5120_package_bga())
348 adm5120_gpio_map
[ADM5120_GPIO_PIN4
].irq
= ADM5120_IRQ_GPIO4
;
351 void __init
adm5120_gpio_ew_enable(void)
353 gpio_conf2
|= GPIO_CONF2_EW
;
354 SW_WRITE_REG(SWITCH_REG_GPIO_CONF2
, gpio_conf2
);
356 adm5120_gpio_map
[ADM5120_GPIO_PIN0
].flags
&= ~GPIO_FLAG_VALID
;
359 void __init
adm5120_gpio_init(void)
364 SW_WRITE_REG(SWITCH_REG_GPIO_CONF2
, gpio_conf2
);
366 for (i
= 0; i
< ADM5120_GPIO_COUNT
; i
++)
367 adm5120_gpio_map
[i
].flags
= GPIO_FLAG_VALID
;
369 if (adm5120_package_pqfp()) {
370 adm5120_gpio_map
[ADM5120_GPIO_PIN4
].flags
&= ~GPIO_FLAG_VALID
;
371 adm5120_gpio_map
[ADM5120_GPIO_PIN5
].flags
&= ~GPIO_FLAG_VALID
;
372 adm5120_gpio_map
[ADM5120_GPIO_PIN6
].flags
&= ~GPIO_FLAG_VALID
;
373 adm5120_gpio_map
[ADM5120_GPIO_PIN7
].flags
&= ~GPIO_FLAG_VALID
;