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;