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authoreric miao <eric.miao@marvell.com>2008-03-03 22:42:26 -0500
committerRussell King <rmk+kernel@arm.linux.org.uk>2008-04-19 06:29:03 -0400
commite3630db1fa7677b350fd5a1ac5498cc48448ae28 (patch)
tree13fb517ac69a7a7a34851a0c4019d65f0b1bab8c /arch/arm/mach-pxa
parent0e037bbb4a639fff01cebf552db19237ec688678 (diff)
[ARM] pxa: move GPIO IRQ specific code out of irq.c into gpio.c
Signed-off-by: eric miao <eric.miao@marvell.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/mach-pxa')
-rw-r--r--arch/arm/mach-pxa/generic.h1
-rw-r--r--arch/arm/mach-pxa/gpio.c183
-rw-r--r--arch/arm/mach-pxa/irq.c184
3 files changed, 185 insertions, 183 deletions
diff --git a/arch/arm/mach-pxa/generic.h b/arch/arm/mach-pxa/generic.h
index b3d10b0e52a0..cbe6693b1b6f 100644
--- a/arch/arm/mach-pxa/generic.h
+++ b/arch/arm/mach-pxa/generic.h
@@ -16,6 +16,7 @@ extern void __init pxa_init_irq_low(void);
16extern void __init pxa_init_irq_high(void); 16extern void __init pxa_init_irq_high(void);
17extern void __init pxa_init_irq_gpio(int gpio_nr); 17extern void __init pxa_init_irq_gpio(int gpio_nr);
18extern void __init pxa_init_irq_set_wake(int (*set_wake)(unsigned int, unsigned int)); 18extern void __init pxa_init_irq_set_wake(int (*set_wake)(unsigned int, unsigned int));
19extern void __init pxa_init_gpio_set_wake(int (*set_wake)(unsigned int, unsigned int));
19extern void __init pxa_init_gpio(int gpio_nr); 20extern void __init pxa_init_gpio(int gpio_nr);
20extern void __init pxa25x_init_irq(void); 21extern void __init pxa25x_init_irq(void);
21extern void __init pxa27x_init_irq(void); 22extern void __init pxa27x_init_irq(void);
diff --git a/arch/arm/mach-pxa/gpio.c b/arch/arm/mach-pxa/gpio.c
index 37b5b83fe240..a64227254151 100644
--- a/arch/arm/mach-pxa/gpio.c
+++ b/arch/arm/mach-pxa/gpio.c
@@ -14,6 +14,7 @@
14 14
15#include <linux/init.h> 15#include <linux/init.h>
16#include <linux/module.h> 16#include <linux/module.h>
17#include <linux/irq.h>
17 18
18#include <asm/gpio.h> 19#include <asm/gpio.h>
19#include <asm/hardware.h> 20#include <asm/hardware.h>
@@ -165,3 +166,185 @@ void __init pxa_init_gpio(int gpio_nr)
165 gpiochip_add(&pxa_gpio_chip[i/32].chip); 166 gpiochip_add(&pxa_gpio_chip[i/32].chip);
166 } 167 }
167} 168}
169
170/*
171 * PXA GPIO edge detection for IRQs:
172 * IRQs are generated on Falling-Edge, Rising-Edge, or both.
173 * Use this instead of directly setting GRER/GFER.
174 */
175
176static long GPIO_IRQ_rising_edge[4];
177static long GPIO_IRQ_falling_edge[4];
178static long GPIO_IRQ_mask[4];
179
180static int pxa_gpio_irq_type(unsigned int irq, unsigned int type)
181{
182 int gpio, idx;
183
184 gpio = IRQ_TO_GPIO(irq);
185 idx = gpio >> 5;
186
187 if (type == IRQ_TYPE_PROBE) {
188 /* Don't mess with enabled GPIOs using preconfigured edges or
189 * GPIOs set to alternate function or to output during probe
190 */
191 if ((GPIO_IRQ_rising_edge[idx] |
192 GPIO_IRQ_falling_edge[idx] |
193 GPDR(gpio)) & GPIO_bit(gpio))
194 return 0;
195 if (GAFR(gpio) & (0x3 << (((gpio) & 0xf)*2)))
196 return 0;
197 type = IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING;
198 }
199
200 pxa_gpio_mode(gpio | GPIO_IN);
201
202 if (type & IRQ_TYPE_EDGE_RISING)
203 __set_bit(gpio, GPIO_IRQ_rising_edge);
204 else
205 __clear_bit(gpio, GPIO_IRQ_rising_edge);
206
207 if (type & IRQ_TYPE_EDGE_FALLING)
208 __set_bit(gpio, GPIO_IRQ_falling_edge);
209 else
210 __clear_bit(gpio, GPIO_IRQ_falling_edge);
211
212 GRER(gpio) = GPIO_IRQ_rising_edge[idx] & GPIO_IRQ_mask[idx];
213 GFER(gpio) = GPIO_IRQ_falling_edge[idx] & GPIO_IRQ_mask[idx];
214
215 pr_debug("%s: IRQ%d (GPIO%d) - edge%s%s\n", __func__, irq, gpio,
216 ((type & IRQ_TYPE_EDGE_RISING) ? " rising" : ""),
217 ((type & IRQ_TYPE_EDGE_FALLING) ? " falling" : ""));
218 return 0;
219}
220
221/*
222 * GPIO IRQs must be acknowledged. This is for GPIO 0 and 1.
223 */
224
225static void pxa_ack_low_gpio(unsigned int irq)
226{
227 GEDR0 = (1 << (irq - IRQ_GPIO0));
228}
229
230static void pxa_mask_low_gpio(unsigned int irq)
231{
232 ICMR &= ~(1 << (irq - PXA_IRQ(0)));
233}
234
235static void pxa_unmask_low_gpio(unsigned int irq)
236{
237 ICMR |= 1 << (irq - PXA_IRQ(0));
238}
239
240static struct irq_chip pxa_low_gpio_chip = {
241 .name = "GPIO-l",
242 .ack = pxa_ack_low_gpio,
243 .mask = pxa_mask_low_gpio,
244 .unmask = pxa_unmask_low_gpio,
245 .set_type = pxa_gpio_irq_type,
246};
247
248/*
249 * Demux handler for GPIO>=2 edge detect interrupts
250 */
251
252#define GEDR_BITS (sizeof(gedr) * BITS_PER_BYTE)
253
254static void pxa_gpio_demux_handler(unsigned int irq, struct irq_desc *desc)
255{
256 int loop, bit, n;
257 unsigned long gedr[4];
258
259 do {
260 gedr[0] = GEDR0 & GPIO_IRQ_mask[0] & ~3;
261 gedr[1] = GEDR1 & GPIO_IRQ_mask[1];
262 gedr[2] = GEDR2 & GPIO_IRQ_mask[2];
263 gedr[3] = GEDR3 & GPIO_IRQ_mask[3];
264
265 GEDR0 = gedr[0]; GEDR1 = gedr[1];
266 GEDR2 = gedr[2]; GEDR3 = gedr[3];
267
268 loop = 0;
269 bit = find_first_bit(gedr, GEDR_BITS);
270 while (bit < GEDR_BITS) {
271 loop = 1;
272
273 n = PXA_GPIO_IRQ_BASE + bit;
274 desc_handle_irq(n, irq_desc + n);
275
276 bit = find_next_bit(gedr, GEDR_BITS, bit + 1);
277 }
278 } while (loop);
279}
280
281static void pxa_ack_muxed_gpio(unsigned int irq)
282{
283 int gpio = irq - IRQ_GPIO(2) + 2;
284 GEDR(gpio) = GPIO_bit(gpio);
285}
286
287static void pxa_mask_muxed_gpio(unsigned int irq)
288{
289 int gpio = irq - IRQ_GPIO(2) + 2;
290 __clear_bit(gpio, GPIO_IRQ_mask);
291 GRER(gpio) &= ~GPIO_bit(gpio);
292 GFER(gpio) &= ~GPIO_bit(gpio);
293}
294
295static void pxa_unmask_muxed_gpio(unsigned int irq)
296{
297 int gpio = irq - IRQ_GPIO(2) + 2;
298 int idx = gpio >> 5;
299 __set_bit(gpio, GPIO_IRQ_mask);
300 GRER(gpio) = GPIO_IRQ_rising_edge[idx] & GPIO_IRQ_mask[idx];
301 GFER(gpio) = GPIO_IRQ_falling_edge[idx] & GPIO_IRQ_mask[idx];
302}
303
304static struct irq_chip pxa_muxed_gpio_chip = {
305 .name = "GPIO",
306 .ack = pxa_ack_muxed_gpio,
307 .mask = pxa_mask_muxed_gpio,
308 .unmask = pxa_unmask_muxed_gpio,
309 .set_type = pxa_gpio_irq_type,
310};
311
312void __init pxa_init_irq_gpio(int gpio_nr)
313{
314 int irq, i;
315
316 pxa_last_gpio = gpio_nr - 1;
317
318 /* clear all GPIO edge detects */
319 for (i = 0; i < gpio_nr; i += 32) {
320 GFER(i) = 0;
321 GRER(i) = 0;
322 GEDR(i) = GEDR(i);
323 }
324
325 /* GPIO 0 and 1 must have their mask bit always set */
326 GPIO_IRQ_mask[0] = 3;
327
328 for (irq = IRQ_GPIO0; irq <= IRQ_GPIO1; irq++) {
329 set_irq_chip(irq, &pxa_low_gpio_chip);
330 set_irq_handler(irq, handle_edge_irq);
331 set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
332 }
333
334 for (irq = IRQ_GPIO(2); irq < IRQ_GPIO(gpio_nr); irq++) {
335 set_irq_chip(irq, &pxa_muxed_gpio_chip);
336 set_irq_handler(irq, handle_edge_irq);
337 set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
338 }
339
340 /* Install handler for GPIO>=2 edge detect interrupts */
341 set_irq_chained_handler(IRQ_GPIO_2_x, pxa_gpio_demux_handler);
342
343 pxa_init_gpio(gpio_nr);
344}
345
346void __init pxa_init_gpio_set_wake(int (*set_wake)(unsigned int, unsigned int))
347{
348 pxa_low_gpio_chip.set_wake = set_wake;
349 pxa_muxed_gpio_chip.set_wake = set_wake;
350}
diff --git a/arch/arm/mach-pxa/irq.c b/arch/arm/mach-pxa/irq.c
index 4fd4560dd3ad..da3a44a4249a 100644
--- a/arch/arm/mach-pxa/irq.c
+++ b/arch/arm/mach-pxa/irq.c
@@ -1,7 +1,7 @@
1/* 1/*
2 * linux/arch/arm/mach-pxa/irq.c 2 * linux/arch/arm/mach-pxa/irq.c
3 * 3 *
4 * Generic PXA IRQ handling, GPIO IRQ demultiplexing, etc. 4 * Generic PXA IRQ handling
5 * 5 *
6 * Author: Nicolas Pitre 6 * Author: Nicolas Pitre
7 * Created: Jun 15, 2001 7 * Created: Jun 15, 2001
@@ -104,188 +104,6 @@ void __init pxa_init_irq_high(void)
104} 104}
105#endif 105#endif
106 106
107/*
108 * PXA GPIO edge detection for IRQs:
109 * IRQs are generated on Falling-Edge, Rising-Edge, or both.
110 * Use this instead of directly setting GRER/GFER.
111 */
112
113static long GPIO_IRQ_rising_edge[4];
114static long GPIO_IRQ_falling_edge[4];
115static long GPIO_IRQ_mask[4];
116
117static int pxa_gpio_irq_type(unsigned int irq, unsigned int type)
118{
119 int gpio, idx;
120
121 gpio = IRQ_TO_GPIO(irq);
122 idx = gpio >> 5;
123
124 if (type == IRQ_TYPE_PROBE) {
125 /* Don't mess with enabled GPIOs using preconfigured edges or
126 * GPIOs set to alternate function or to output during probe
127 */
128 if ((GPIO_IRQ_rising_edge[idx] |
129 GPIO_IRQ_falling_edge[idx] |
130 GPDR(gpio)) & GPIO_bit(gpio))
131 return 0;
132 if (GAFR(gpio) & (0x3 << (((gpio) & 0xf)*2)))
133 return 0;
134 type = IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING;
135 }
136
137 pxa_gpio_mode(gpio | GPIO_IN);
138
139 if (type & IRQ_TYPE_EDGE_RISING)
140 __set_bit(gpio, GPIO_IRQ_rising_edge);
141 else
142 __clear_bit(gpio, GPIO_IRQ_rising_edge);
143
144 if (type & IRQ_TYPE_EDGE_FALLING)
145 __set_bit(gpio, GPIO_IRQ_falling_edge);
146 else
147 __clear_bit(gpio, GPIO_IRQ_falling_edge);
148
149 GRER(gpio) = GPIO_IRQ_rising_edge[idx] & GPIO_IRQ_mask[idx];
150 GFER(gpio) = GPIO_IRQ_falling_edge[idx] & GPIO_IRQ_mask[idx];
151
152 pr_debug("%s: IRQ%d (GPIO%d) - edge%s%s\n", __func__, irq, gpio,
153 ((type & IRQ_TYPE_EDGE_RISING) ? " rising" : ""),
154 ((type & IRQ_TYPE_EDGE_FALLING) ? " falling" : ""));
155 return 0;
156}
157
158/*
159 * GPIO IRQs must be acknowledged. This is for GPIO 0 and 1.
160 */
161
162static void pxa_ack_low_gpio(unsigned int irq)
163{
164 GEDR0 = (1 << (irq - IRQ_GPIO0));
165}
166
167static void pxa_mask_low_gpio(unsigned int irq)
168{
169 ICMR &= ~(1 << (irq - PXA_IRQ(0)));
170}
171
172static void pxa_unmask_low_gpio(unsigned int irq)
173{
174 ICMR |= 1 << (irq - PXA_IRQ(0));
175}
176
177static struct irq_chip pxa_low_gpio_chip = {
178 .name = "GPIO-l",
179 .ack = pxa_ack_low_gpio,
180 .mask = pxa_mask_low_gpio,
181 .unmask = pxa_unmask_low_gpio,
182 .set_type = pxa_gpio_irq_type,
183};
184
185/*
186 * Demux handler for GPIO>=2 edge detect interrupts
187 */
188
189#define GEDR_BITS (sizeof(gedr) * BITS_PER_BYTE)
190
191static void pxa_gpio_demux_handler(unsigned int irq, struct irq_desc *desc)
192{
193 int loop, bit, n;
194 unsigned long gedr[4];
195
196 do {
197 gedr[0] = GEDR0 & GPIO_IRQ_mask[0] & ~3;
198 gedr[1] = GEDR1 & GPIO_IRQ_mask[1];
199 gedr[2] = GEDR2 & GPIO_IRQ_mask[2];
200 gedr[3] = GEDR3 & GPIO_IRQ_mask[3];
201
202 GEDR0 = gedr[0]; GEDR1 = gedr[1];
203 GEDR2 = gedr[2]; GEDR3 = gedr[3];
204
205 loop = 0;
206 bit = find_first_bit(gedr, GEDR_BITS);
207 while (bit < GEDR_BITS) {
208 loop = 1;
209
210 n = PXA_GPIO_IRQ_BASE + bit;
211 desc_handle_irq(n, irq_desc + n);
212
213 bit = find_next_bit(gedr, GEDR_BITS, bit + 1);
214 }
215 } while (loop);
216}
217
218static void pxa_ack_muxed_gpio(unsigned int irq)
219{
220 int gpio = irq - IRQ_GPIO(2) + 2;
221 GEDR(gpio) = GPIO_bit(gpio);
222}
223
224static void pxa_mask_muxed_gpio(unsigned int irq)
225{
226 int gpio = irq - IRQ_GPIO(2) + 2;
227 __clear_bit(gpio, GPIO_IRQ_mask);
228 GRER(gpio) &= ~GPIO_bit(gpio);
229 GFER(gpio) &= ~GPIO_bit(gpio);
230}
231
232static void pxa_unmask_muxed_gpio(unsigned int irq)
233{
234 int gpio = irq - IRQ_GPIO(2) + 2;
235 int idx = gpio >> 5;
236 __set_bit(gpio, GPIO_IRQ_mask);
237 GRER(gpio) = GPIO_IRQ_rising_edge[idx] & GPIO_IRQ_mask[idx];
238 GFER(gpio) = GPIO_IRQ_falling_edge[idx] & GPIO_IRQ_mask[idx];
239}
240
241static struct irq_chip pxa_muxed_gpio_chip = {
242 .name = "GPIO",
243 .ack = pxa_ack_muxed_gpio,
244 .mask = pxa_mask_muxed_gpio,
245 .unmask = pxa_unmask_muxed_gpio,
246 .set_type = pxa_gpio_irq_type,
247};
248
249void __init pxa_init_irq_gpio(int gpio_nr)
250{
251 int irq, i;
252
253 pxa_last_gpio = gpio_nr - 1;
254
255 /* clear all GPIO edge detects */
256 for (i = 0; i < gpio_nr; i += 32) {
257 GFER(i) = 0;
258 GRER(i) = 0;
259 GEDR(i) = GEDR(i);
260 }
261
262 /* GPIO 0 and 1 must have their mask bit always set */
263 GPIO_IRQ_mask[0] = 3;
264
265 for (irq = IRQ_GPIO0; irq <= IRQ_GPIO1; irq++) {
266 set_irq_chip(irq, &pxa_low_gpio_chip);
267 set_irq_handler(irq, handle_edge_irq);
268 set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
269 }
270
271 for (irq = IRQ_GPIO(2); irq < IRQ_GPIO(gpio_nr); irq++) {
272 set_irq_chip(irq, &pxa_muxed_gpio_chip);
273 set_irq_handler(irq, handle_edge_irq);
274 set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
275 }
276
277 /* Install handler for GPIO>=2 edge detect interrupts */
278 set_irq_chained_handler(IRQ_GPIO_2_x, pxa_gpio_demux_handler);
279
280 pxa_init_gpio(gpio_nr);
281}
282
283void __init pxa_init_gpio_set_wake(int (*set_wake)(unsigned int, unsigned int))
284{
285 pxa_low_gpio_chip.set_wake = set_wake;
286 pxa_muxed_gpio_chip.set_wake = set_wake;
287}
288
289void __init pxa_init_irq_set_wake(int (*set_wake)(unsigned int, unsigned int)) 107void __init pxa_init_irq_set_wake(int (*set_wake)(unsigned int, unsigned int))
290{ 108{
291 pxa_internal_chip_low.set_wake = set_wake; 109 pxa_internal_chip_low.set_wake = set_wake;
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