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Linux 3.15-rc1
[linux/fpc-iii.git] / arch / mips / alchemy / common / irq.c
blob63a71817a00cbc92acdcab670aabb1f97eecf028
1 /*
2 * Copyright 2001, 2007-2008 MontaVista Software Inc.
3 * Author: MontaVista Software, Inc. <source@mvista.com>
4 *
5 * Copyright (C) 2007 Ralf Baechle (ralf@linux-mips.org)
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version.
11 *
12 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
13 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
14 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
15 * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
16 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
17 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
18 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
19 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
20 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
21 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
22 *
23 * You should have received a copy of the GNU General Public License along
24 * with this program; if not, write to the Free Software Foundation, Inc.,
25 * 675 Mass Ave, Cambridge, MA 02139, USA.
26 */
27
28 #include <linux/export.h>
29 #include <linux/init.h>
30 #include <linux/interrupt.h>
31 #include <linux/slab.h>
32 #include <linux/syscore_ops.h>
33
34 #include <asm/irq_cpu.h>
35 #include <asm/mach-au1x00/au1000.h>
36 #include <asm/mach-au1x00/gpio-au1300.h>
37
38 /* Interrupt Controller register offsets */
39 #define IC_CFG0RD 0x40
40 #define IC_CFG0SET 0x40
41 #define IC_CFG0CLR 0x44
42 #define IC_CFG1RD 0x48
43 #define IC_CFG1SET 0x48
44 #define IC_CFG1CLR 0x4C
45 #define IC_CFG2RD 0x50
46 #define IC_CFG2SET 0x50
47 #define IC_CFG2CLR 0x54
48 #define IC_REQ0INT 0x54
49 #define IC_SRCRD 0x58
50 #define IC_SRCSET 0x58
51 #define IC_SRCCLR 0x5C
52 #define IC_REQ1INT 0x5C
53 #define IC_ASSIGNRD 0x60
54 #define IC_ASSIGNSET 0x60
55 #define IC_ASSIGNCLR 0x64
56 #define IC_WAKERD 0x68
57 #define IC_WAKESET 0x68
58 #define IC_WAKECLR 0x6C
59 #define IC_MASKRD 0x70
60 #define IC_MASKSET 0x70
61 #define IC_MASKCLR 0x74
62 #define IC_RISINGRD 0x78
63 #define IC_RISINGCLR 0x78
64 #define IC_FALLINGRD 0x7C
65 #define IC_FALLINGCLR 0x7C
66 #define IC_TESTBIT 0x80
67
68 /* per-processor fixed function irqs */
69 struct alchemy_irqmap {
70 int irq; /* linux IRQ number */
71 int type; /* IRQ_TYPE_ */
72 int prio; /* irq priority, 0 highest, 3 lowest */
73 int internal; /* GPIC: internal source (no ext. pin)? */
74 };
75
76 static int au1x_ic_settype(struct irq_data *d, unsigned int type);
77 static int au1300_gpic_settype(struct irq_data *d, unsigned int type);
78
79
80 /* NOTE on interrupt priorities: The original writers of this code said:
81 *
82 * Because of the tight timing of SETUP token to reply transactions,
83 * the USB devices-side packet complete interrupt (USB_DEV_REQ_INT)
84 * needs the highest priority.
85 */
86 struct alchemy_irqmap au1000_irqmap[] __initdata = {
87 { AU1000_UART0_INT, IRQ_TYPE_LEVEL_HIGH, 1, 0 },
88 { AU1000_UART1_INT, IRQ_TYPE_LEVEL_HIGH, 1, 0 },
89 { AU1000_UART2_INT, IRQ_TYPE_LEVEL_HIGH, 1, 0 },
90 { AU1000_UART3_INT, IRQ_TYPE_LEVEL_HIGH, 1, 0 },
91 { AU1000_SSI0_INT, IRQ_TYPE_LEVEL_HIGH, 1, 0 },
92 { AU1000_SSI1_INT, IRQ_TYPE_LEVEL_HIGH, 1, 0 },
93 { AU1000_DMA_INT_BASE, IRQ_TYPE_LEVEL_HIGH, 1, 0 },
94 { AU1000_DMA_INT_BASE+1, IRQ_TYPE_LEVEL_HIGH, 1, 0 },
95 { AU1000_DMA_INT_BASE+2, IRQ_TYPE_LEVEL_HIGH, 1, 0 },
96 { AU1000_DMA_INT_BASE+3, IRQ_TYPE_LEVEL_HIGH, 1, 0 },
97 { AU1000_DMA_INT_BASE+4, IRQ_TYPE_LEVEL_HIGH, 1, 0 },
98 { AU1000_DMA_INT_BASE+5, IRQ_TYPE_LEVEL_HIGH, 1, 0 },
99 { AU1000_DMA_INT_BASE+6, IRQ_TYPE_LEVEL_HIGH, 1, 0 },
100 { AU1000_DMA_INT_BASE+7, IRQ_TYPE_LEVEL_HIGH, 1, 0 },
101 { AU1000_TOY_INT, IRQ_TYPE_EDGE_RISING, 1, 0 },
102 { AU1000_TOY_MATCH0_INT, IRQ_TYPE_EDGE_RISING, 1, 0 },
103 { AU1000_TOY_MATCH1_INT, IRQ_TYPE_EDGE_RISING, 1, 0 },
104 { AU1000_TOY_MATCH2_INT, IRQ_TYPE_EDGE_RISING, 1, 0 },
105 { AU1000_RTC_INT, IRQ_TYPE_EDGE_RISING, 1, 0 },
106 { AU1000_RTC_MATCH0_INT, IRQ_TYPE_EDGE_RISING, 1, 0 },
107 { AU1000_RTC_MATCH1_INT, IRQ_TYPE_EDGE_RISING, 1, 0 },
108 { AU1000_RTC_MATCH2_INT, IRQ_TYPE_EDGE_RISING, 0, 0 },
109 { AU1000_IRDA_TX_INT, IRQ_TYPE_LEVEL_HIGH, 1, 0 },
110 { AU1000_IRDA_RX_INT, IRQ_TYPE_LEVEL_HIGH, 1, 0 },
111 { AU1000_USB_DEV_REQ_INT, IRQ_TYPE_LEVEL_HIGH, 0, 0 },
112 { AU1000_USB_DEV_SUS_INT, IRQ_TYPE_EDGE_RISING, 1, 0 },
113 { AU1000_USB_HOST_INT, IRQ_TYPE_LEVEL_LOW, 1, 0 },
114 { AU1000_ACSYNC_INT, IRQ_TYPE_EDGE_RISING, 1, 0 },
115 { AU1000_MAC0_DMA_INT, IRQ_TYPE_LEVEL_HIGH, 1, 0 },
116 { AU1000_MAC1_DMA_INT, IRQ_TYPE_LEVEL_HIGH, 1, 0 },
117 { AU1000_AC97C_INT, IRQ_TYPE_EDGE_RISING, 1, 0 },
118 { -1, },
119 };
120
121 struct alchemy_irqmap au1500_irqmap[] __initdata = {
122 { AU1500_UART0_INT, IRQ_TYPE_LEVEL_HIGH, 1, 0 },
123 { AU1500_PCI_INTA, IRQ_TYPE_LEVEL_LOW, 1, 0 },
124 { AU1500_PCI_INTB, IRQ_TYPE_LEVEL_LOW, 1, 0 },
125 { AU1500_UART3_INT, IRQ_TYPE_LEVEL_HIGH, 1, 0 },
126 { AU1500_PCI_INTC, IRQ_TYPE_LEVEL_LOW, 1, 0 },
127 { AU1500_PCI_INTD, IRQ_TYPE_LEVEL_LOW, 1, 0 },
128 { AU1500_DMA_INT_BASE, IRQ_TYPE_LEVEL_HIGH, 1, 0 },
129 { AU1500_DMA_INT_BASE+1, IRQ_TYPE_LEVEL_HIGH, 1, 0 },
130 { AU1500_DMA_INT_BASE+2, IRQ_TYPE_LEVEL_HIGH, 1, 0 },
131 { AU1500_DMA_INT_BASE+3, IRQ_TYPE_LEVEL_HIGH, 1, 0 },
132 { AU1500_DMA_INT_BASE+4, IRQ_TYPE_LEVEL_HIGH, 1, 0 },
133 { AU1500_DMA_INT_BASE+5, IRQ_TYPE_LEVEL_HIGH, 1, 0 },
134 { AU1500_DMA_INT_BASE+6, IRQ_TYPE_LEVEL_HIGH, 1, 0 },
135 { AU1500_DMA_INT_BASE+7, IRQ_TYPE_LEVEL_HIGH, 1, 0 },
136 { AU1500_TOY_INT, IRQ_TYPE_EDGE_RISING, 1, 0 },
137 { AU1500_TOY_MATCH0_INT, IRQ_TYPE_EDGE_RISING, 1, 0 },
138 { AU1500_TOY_MATCH1_INT, IRQ_TYPE_EDGE_RISING, 1, 0 },
139 { AU1500_TOY_MATCH2_INT, IRQ_TYPE_EDGE_RISING, 1, 0 },
140 { AU1500_RTC_INT, IRQ_TYPE_EDGE_RISING, 1, 0 },
141 { AU1500_RTC_MATCH0_INT, IRQ_TYPE_EDGE_RISING, 1, 0 },
142 { AU1500_RTC_MATCH1_INT, IRQ_TYPE_EDGE_RISING, 1, 0 },
143 { AU1500_RTC_MATCH2_INT, IRQ_TYPE_EDGE_RISING, 0, 0 },
144 { AU1500_USB_DEV_REQ_INT, IRQ_TYPE_LEVEL_HIGH, 0, 0 },
145 { AU1500_USB_DEV_SUS_INT, IRQ_TYPE_EDGE_RISING, 1, 0 },
146 { AU1500_USB_HOST_INT, IRQ_TYPE_LEVEL_LOW, 1, 0 },
147 { AU1500_ACSYNC_INT, IRQ_TYPE_EDGE_RISING, 1, 0 },
148 { AU1500_MAC0_DMA_INT, IRQ_TYPE_LEVEL_HIGH, 1, 0 },
149 { AU1500_MAC1_DMA_INT, IRQ_TYPE_LEVEL_HIGH, 1, 0 },
150 { AU1500_AC97C_INT, IRQ_TYPE_EDGE_RISING, 1, 0 },
151 { -1, },
152 };
153
154 struct alchemy_irqmap au1100_irqmap[] __initdata = {
155 { AU1100_UART0_INT, IRQ_TYPE_LEVEL_HIGH, 1, 0 },
156 { AU1100_UART1_INT, IRQ_TYPE_LEVEL_HIGH, 1, 0 },
157 { AU1100_SD_INT, IRQ_TYPE_LEVEL_HIGH, 1, 0 },
158 { AU1100_UART3_INT, IRQ_TYPE_LEVEL_HIGH, 1, 0 },
159 { AU1100_SSI0_INT, IRQ_TYPE_LEVEL_HIGH, 1, 0 },
160 { AU1100_SSI1_INT, IRQ_TYPE_LEVEL_HIGH, 1, 0 },
161 { AU1100_DMA_INT_BASE, IRQ_TYPE_LEVEL_HIGH, 1, 0 },
162 { AU1100_DMA_INT_BASE+1, IRQ_TYPE_LEVEL_HIGH, 1, 0 },
163 { AU1100_DMA_INT_BASE+2, IRQ_TYPE_LEVEL_HIGH, 1, 0 },
164 { AU1100_DMA_INT_BASE+3, IRQ_TYPE_LEVEL_HIGH, 1, 0 },
165 { AU1100_DMA_INT_BASE+4, IRQ_TYPE_LEVEL_HIGH, 1, 0 },
166 { AU1100_DMA_INT_BASE+5, IRQ_TYPE_LEVEL_HIGH, 1, 0 },
167 { AU1100_DMA_INT_BASE+6, IRQ_TYPE_LEVEL_HIGH, 1, 0 },
168 { AU1100_DMA_INT_BASE+7, IRQ_TYPE_LEVEL_HIGH, 1, 0 },
169 { AU1100_TOY_INT, IRQ_TYPE_EDGE_RISING, 1, 0 },
170 { AU1100_TOY_MATCH0_INT, IRQ_TYPE_EDGE_RISING, 1, 0 },
171 { AU1100_TOY_MATCH1_INT, IRQ_TYPE_EDGE_RISING, 1, 0 },
172 { AU1100_TOY_MATCH2_INT, IRQ_TYPE_EDGE_RISING, 1, 0 },
173 { AU1100_RTC_INT, IRQ_TYPE_EDGE_RISING, 1, 0 },
174 { AU1100_RTC_MATCH0_INT, IRQ_TYPE_EDGE_RISING, 1, 0 },
175 { AU1100_RTC_MATCH1_INT, IRQ_TYPE_EDGE_RISING, 1, 0 },
176 { AU1100_RTC_MATCH2_INT, IRQ_TYPE_EDGE_RISING, 0, 0 },
177 { AU1100_IRDA_TX_INT, IRQ_TYPE_LEVEL_HIGH, 1, 0 },
178 { AU1100_IRDA_RX_INT, IRQ_TYPE_LEVEL_HIGH, 1, 0 },
179 { AU1100_USB_DEV_REQ_INT, IRQ_TYPE_LEVEL_HIGH, 0, 0 },
180 { AU1100_USB_DEV_SUS_INT, IRQ_TYPE_EDGE_RISING, 1, 0 },
181 { AU1100_USB_HOST_INT, IRQ_TYPE_LEVEL_LOW, 1, 0 },
182 { AU1100_ACSYNC_INT, IRQ_TYPE_EDGE_RISING, 1, 0 },
183 { AU1100_MAC0_DMA_INT, IRQ_TYPE_LEVEL_HIGH, 1, 0 },
184 { AU1100_LCD_INT, IRQ_TYPE_LEVEL_HIGH, 1, 0 },
185 { AU1100_AC97C_INT, IRQ_TYPE_EDGE_RISING, 1, 0 },
186 { -1, },
187 };
188
189 struct alchemy_irqmap au1550_irqmap[] __initdata = {
190 { AU1550_UART0_INT, IRQ_TYPE_LEVEL_HIGH, 1, 0 },
191 { AU1550_PCI_INTA, IRQ_TYPE_LEVEL_LOW, 1, 0 },
192 { AU1550_PCI_INTB, IRQ_TYPE_LEVEL_LOW, 1, 0 },
193 { AU1550_DDMA_INT, IRQ_TYPE_LEVEL_HIGH, 1, 0 },
194 { AU1550_CRYPTO_INT, IRQ_TYPE_LEVEL_HIGH, 1, 0 },
195 { AU1550_PCI_INTC, IRQ_TYPE_LEVEL_LOW, 1, 0 },
196 { AU1550_PCI_INTD, IRQ_TYPE_LEVEL_LOW, 1, 0 },
197 { AU1550_PCI_RST_INT, IRQ_TYPE_LEVEL_LOW, 1, 0 },
198 { AU1550_UART1_INT, IRQ_TYPE_LEVEL_HIGH, 1, 0 },
199 { AU1550_UART3_INT, IRQ_TYPE_LEVEL_HIGH, 1, 0 },
200 { AU1550_PSC0_INT, IRQ_TYPE_LEVEL_HIGH, 1, 0 },
201 { AU1550_PSC1_INT, IRQ_TYPE_LEVEL_HIGH, 1, 0 },
202 { AU1550_PSC2_INT, IRQ_TYPE_LEVEL_HIGH, 1, 0 },
203 { AU1550_PSC3_INT, IRQ_TYPE_LEVEL_HIGH, 1, 0 },
204 { AU1550_TOY_INT, IRQ_TYPE_EDGE_RISING, 1, 0 },
205 { AU1550_TOY_MATCH0_INT, IRQ_TYPE_EDGE_RISING, 1, 0 },
206 { AU1550_TOY_MATCH1_INT, IRQ_TYPE_EDGE_RISING, 1, 0 },
207 { AU1550_TOY_MATCH2_INT, IRQ_TYPE_EDGE_RISING, 1, 0 },
208 { AU1550_RTC_INT, IRQ_TYPE_EDGE_RISING, 1, 0 },
209 { AU1550_RTC_MATCH0_INT, IRQ_TYPE_EDGE_RISING, 1, 0 },
210 { AU1550_RTC_MATCH1_INT, IRQ_TYPE_EDGE_RISING, 1, 0 },
211 { AU1550_RTC_MATCH2_INT, IRQ_TYPE_EDGE_RISING, 0, 0 },
212 { AU1550_NAND_INT, IRQ_TYPE_EDGE_RISING, 1, 0 },
213 { AU1550_USB_DEV_REQ_INT, IRQ_TYPE_LEVEL_HIGH, 0, 0 },
214 { AU1550_USB_DEV_SUS_INT, IRQ_TYPE_EDGE_RISING, 1, 0 },
215 { AU1550_USB_HOST_INT, IRQ_TYPE_LEVEL_LOW, 1, 0 },
216 { AU1550_MAC0_DMA_INT, IRQ_TYPE_LEVEL_HIGH, 1, 0 },
217 { AU1550_MAC1_DMA_INT, IRQ_TYPE_LEVEL_HIGH, 1, 0 },
218 { -1, },
219 };
220
221 struct alchemy_irqmap au1200_irqmap[] __initdata = {
222 { AU1200_UART0_INT, IRQ_TYPE_LEVEL_HIGH, 1, 0 },
223 { AU1200_SWT_INT, IRQ_TYPE_EDGE_RISING, 1, 0 },
224 { AU1200_SD_INT, IRQ_TYPE_LEVEL_HIGH, 1, 0 },
225 { AU1200_DDMA_INT, IRQ_TYPE_LEVEL_HIGH, 1, 0 },
226 { AU1200_MAE_BE_INT, IRQ_TYPE_LEVEL_HIGH, 1, 0 },
227 { AU1200_UART1_INT, IRQ_TYPE_LEVEL_HIGH, 1, 0 },
228 { AU1200_MAE_FE_INT, IRQ_TYPE_LEVEL_HIGH, 1, 0 },
229 { AU1200_PSC0_INT, IRQ_TYPE_LEVEL_HIGH, 1, 0 },
230 { AU1200_PSC1_INT, IRQ_TYPE_LEVEL_HIGH, 1, 0 },
231 { AU1200_AES_INT, IRQ_TYPE_LEVEL_HIGH, 1, 0 },
232 { AU1200_CAMERA_INT, IRQ_TYPE_LEVEL_HIGH, 1, 0 },
233 { AU1200_TOY_INT, IRQ_TYPE_EDGE_RISING, 1, 0 },
234 { AU1200_TOY_MATCH0_INT, IRQ_TYPE_EDGE_RISING, 1, 0 },
235 { AU1200_TOY_MATCH1_INT, IRQ_TYPE_EDGE_RISING, 1, 0 },
236 { AU1200_TOY_MATCH2_INT, IRQ_TYPE_EDGE_RISING, 1, 0 },
237 { AU1200_RTC_INT, IRQ_TYPE_EDGE_RISING, 1, 0 },
238 { AU1200_RTC_MATCH0_INT, IRQ_TYPE_EDGE_RISING, 1, 0 },
239 { AU1200_RTC_MATCH1_INT, IRQ_TYPE_EDGE_RISING, 1, 0 },
240 { AU1200_RTC_MATCH2_INT, IRQ_TYPE_EDGE_RISING, 0, 0 },
241 { AU1200_NAND_INT, IRQ_TYPE_EDGE_RISING, 1, 0 },
242 { AU1200_USB_INT, IRQ_TYPE_LEVEL_HIGH, 1, 0 },
243 { AU1200_LCD_INT, IRQ_TYPE_LEVEL_HIGH, 1, 0 },
244 { AU1200_MAE_BOTH_INT, IRQ_TYPE_LEVEL_HIGH, 1, 0 },
245 { -1, },
246 };
247
248 static struct alchemy_irqmap au1300_irqmap[] __initdata = {
249 /* multifunction: gpio pin or device */
250 { AU1300_UART1_INT, IRQ_TYPE_LEVEL_HIGH, 1, 0, },
251 { AU1300_UART2_INT, IRQ_TYPE_LEVEL_HIGH, 1, 0, },
252 { AU1300_UART3_INT, IRQ_TYPE_LEVEL_HIGH, 1, 0, },
253 { AU1300_SD1_INT, IRQ_TYPE_LEVEL_HIGH, 1, 0, },
254 { AU1300_SD2_INT, IRQ_TYPE_LEVEL_HIGH, 1, 0, },
255 { AU1300_PSC0_INT, IRQ_TYPE_LEVEL_HIGH, 1, 0, },
256 { AU1300_PSC1_INT, IRQ_TYPE_LEVEL_HIGH, 1, 0, },
257 { AU1300_PSC2_INT, IRQ_TYPE_LEVEL_HIGH, 1, 0, },
258 { AU1300_PSC3_INT, IRQ_TYPE_LEVEL_HIGH, 1, 0, },
259 { AU1300_NAND_INT, IRQ_TYPE_LEVEL_HIGH, 1, 0, },
260 /* au1300 internal */
261 { AU1300_DDMA_INT, IRQ_TYPE_LEVEL_HIGH, 1, 1, },
262 { AU1300_MMU_INT, IRQ_TYPE_LEVEL_HIGH, 1, 1, },
263 { AU1300_MPU_INT, IRQ_TYPE_LEVEL_HIGH, 1, 1, },
264 { AU1300_GPU_INT, IRQ_TYPE_LEVEL_HIGH, 1, 1, },
265 { AU1300_UDMA_INT, IRQ_TYPE_LEVEL_HIGH, 1, 1, },
266 { AU1300_TOY_INT, IRQ_TYPE_EDGE_RISING, 1, 1, },
267 { AU1300_TOY_MATCH0_INT, IRQ_TYPE_EDGE_RISING, 1, 1, },
268 { AU1300_TOY_MATCH1_INT, IRQ_TYPE_EDGE_RISING, 1, 1, },
269 { AU1300_TOY_MATCH2_INT, IRQ_TYPE_EDGE_RISING, 1, 1, },
270 { AU1300_RTC_INT, IRQ_TYPE_EDGE_RISING, 1, 1, },
271 { AU1300_RTC_MATCH0_INT, IRQ_TYPE_EDGE_RISING, 1, 1, },
272 { AU1300_RTC_MATCH1_INT, IRQ_TYPE_EDGE_RISING, 1, 1, },
273 { AU1300_RTC_MATCH2_INT, IRQ_TYPE_EDGE_RISING, 0, 1, },
274 { AU1300_UART0_INT, IRQ_TYPE_LEVEL_HIGH, 1, 1, },
275 { AU1300_SD0_INT, IRQ_TYPE_LEVEL_HIGH, 1, 1, },
276 { AU1300_USB_INT, IRQ_TYPE_LEVEL_HIGH, 1, 1, },
277 { AU1300_LCD_INT, IRQ_TYPE_LEVEL_HIGH, 1, 1, },
278 { AU1300_BSA_INT, IRQ_TYPE_LEVEL_HIGH, 1, 1, },
279 { AU1300_MPE_INT, IRQ_TYPE_EDGE_RISING, 1, 1, },
280 { AU1300_ITE_INT, IRQ_TYPE_LEVEL_HIGH, 1, 1, },
281 { AU1300_AES_INT, IRQ_TYPE_LEVEL_HIGH, 1, 1, },
282 { AU1300_CIM_INT, IRQ_TYPE_LEVEL_HIGH, 1, 1, },
283 { -1, }, /* terminator */
284 };
285
286 /******************************************************************************/
287
288 static void au1x_ic0_unmask(struct irq_data *d)
289 {
290 unsigned int bit = d->irq - AU1000_INTC0_INT_BASE;
291 void __iomem *base = (void __iomem *)KSEG1ADDR(AU1000_IC0_PHYS_ADDR);
292
293 __raw_writel(1 << bit, base + IC_MASKSET);
294 __raw_writel(1 << bit, base + IC_WAKESET);
295 wmb();
296 }
297
298 static void au1x_ic1_unmask(struct irq_data *d)
299 {
300 unsigned int bit = d->irq - AU1000_INTC1_INT_BASE;
301 void __iomem *base = (void __iomem *)KSEG1ADDR(AU1000_IC1_PHYS_ADDR);
302
303 __raw_writel(1 << bit, base + IC_MASKSET);
304 __raw_writel(1 << bit, base + IC_WAKESET);
305 wmb();
306 }
307
308 static void au1x_ic0_mask(struct irq_data *d)
309 {
310 unsigned int bit = d->irq - AU1000_INTC0_INT_BASE;
311 void __iomem *base = (void __iomem *)KSEG1ADDR(AU1000_IC0_PHYS_ADDR);
312
313 __raw_writel(1 << bit, base + IC_MASKCLR);
314 __raw_writel(1 << bit, base + IC_WAKECLR);
315 wmb();
316 }
317
318 static void au1x_ic1_mask(struct irq_data *d)
319 {
320 unsigned int bit = d->irq - AU1000_INTC1_INT_BASE;
321 void __iomem *base = (void __iomem *)KSEG1ADDR(AU1000_IC1_PHYS_ADDR);
322
323 __raw_writel(1 << bit, base + IC_MASKCLR);
324 __raw_writel(1 << bit, base + IC_WAKECLR);
325 wmb();
326 }
327
328 static void au1x_ic0_ack(struct irq_data *d)
329 {
330 unsigned int bit = d->irq - AU1000_INTC0_INT_BASE;
331 void __iomem *base = (void __iomem *)KSEG1ADDR(AU1000_IC0_PHYS_ADDR);
332
333 /*
334 * This may assume that we don't get interrupts from
335 * both edges at once, or if we do, that we don't care.
336 */
337 __raw_writel(1 << bit, base + IC_FALLINGCLR);
338 __raw_writel(1 << bit, base + IC_RISINGCLR);
339 wmb();
340 }
341
342 static void au1x_ic1_ack(struct irq_data *d)
343 {
344 unsigned int bit = d->irq - AU1000_INTC1_INT_BASE;
345 void __iomem *base = (void __iomem *)KSEG1ADDR(AU1000_IC1_PHYS_ADDR);
346
347 /*
348 * This may assume that we don't get interrupts from
349 * both edges at once, or if we do, that we don't care.
350 */
351 __raw_writel(1 << bit, base + IC_FALLINGCLR);
352 __raw_writel(1 << bit, base + IC_RISINGCLR);
353 wmb();
354 }
355
356 static void au1x_ic0_maskack(struct irq_data *d)
357 {
358 unsigned int bit = d->irq - AU1000_INTC0_INT_BASE;
359 void __iomem *base = (void __iomem *)KSEG1ADDR(AU1000_IC0_PHYS_ADDR);
360
361 __raw_writel(1 << bit, base + IC_WAKECLR);
362 __raw_writel(1 << bit, base + IC_MASKCLR);
363 __raw_writel(1 << bit, base + IC_RISINGCLR);
364 __raw_writel(1 << bit, base + IC_FALLINGCLR);
365 wmb();
366 }
367
368 static void au1x_ic1_maskack(struct irq_data *d)
369 {
370 unsigned int bit = d->irq - AU1000_INTC1_INT_BASE;
371 void __iomem *base = (void __iomem *)KSEG1ADDR(AU1000_IC1_PHYS_ADDR);
372
373 __raw_writel(1 << bit, base + IC_WAKECLR);
374 __raw_writel(1 << bit, base + IC_MASKCLR);
375 __raw_writel(1 << bit, base + IC_RISINGCLR);
376 __raw_writel(1 << bit, base + IC_FALLINGCLR);
377 wmb();
378 }
379
380 static int au1x_ic1_setwake(struct irq_data *d, unsigned int on)
381 {
382 int bit = d->irq - AU1000_INTC1_INT_BASE;
383 unsigned long wakemsk, flags;
384
385 /* only GPIO 0-7 can act as wakeup source. Fortunately these
386 * are wired up identically on all supported variants.
387 */
388 if ((bit < 0) || (bit > 7))
389 return -EINVAL;
390
391 local_irq_save(flags);
392 wakemsk = __raw_readl((void __iomem *)SYS_WAKEMSK);
393 if (on)
394 wakemsk |= 1 << bit;
395 else
396 wakemsk &= ~(1 << bit);
397 __raw_writel(wakemsk, (void __iomem *)SYS_WAKEMSK);
398 wmb();
399 local_irq_restore(flags);
400
401 return 0;
402 }
403
404 /*
405 * irq_chips for both ICs; this way the mask handlers can be
406 * as short as possible.
407 */
408 static struct irq_chip au1x_ic0_chip = {
409 .name = "Alchemy-IC0",
410 .irq_ack = au1x_ic0_ack,
411 .irq_mask = au1x_ic0_mask,
412 .irq_mask_ack = au1x_ic0_maskack,
413 .irq_unmask = au1x_ic0_unmask,
414 .irq_set_type = au1x_ic_settype,
415 };
416
417 static struct irq_chip au1x_ic1_chip = {
418 .name = "Alchemy-IC1",
419 .irq_ack = au1x_ic1_ack,
420 .irq_mask = au1x_ic1_mask,
421 .irq_mask_ack = au1x_ic1_maskack,
422 .irq_unmask = au1x_ic1_unmask,
423 .irq_set_type = au1x_ic_settype,
424 .irq_set_wake = au1x_ic1_setwake,
425 };
426
427 static int au1x_ic_settype(struct irq_data *d, unsigned int flow_type)
428 {
429 struct irq_chip *chip;
430 unsigned int bit, irq = d->irq;
431 irq_flow_handler_t handler = NULL;
432 unsigned char *name = NULL;
433 void __iomem *base;
434 int ret;
435
436 if (irq >= AU1000_INTC1_INT_BASE) {
437 bit = irq - AU1000_INTC1_INT_BASE;
438 chip = &au1x_ic1_chip;
439 base = (void __iomem *)KSEG1ADDR(AU1000_IC1_PHYS_ADDR);
440 } else {
441 bit = irq - AU1000_INTC0_INT_BASE;
442 chip = &au1x_ic0_chip;
443 base = (void __iomem *)KSEG1ADDR(AU1000_IC0_PHYS_ADDR);
444 }
445
446 if (bit > 31)
447 return -EINVAL;
448
449 ret = 0;
450
451 switch (flow_type) { /* cfgregs 2:1:0 */
452 case IRQ_TYPE_EDGE_RISING: /* 0:0:1 */
453 __raw_writel(1 << bit, base + IC_CFG2CLR);
454 __raw_writel(1 << bit, base + IC_CFG1CLR);
455 __raw_writel(1 << bit, base + IC_CFG0SET);
456 handler = handle_edge_irq;
457 name = "riseedge";
458 break;
459 case IRQ_TYPE_EDGE_FALLING: /* 0:1:0 */
460 __raw_writel(1 << bit, base + IC_CFG2CLR);
461 __raw_writel(1 << bit, base + IC_CFG1SET);
462 __raw_writel(1 << bit, base + IC_CFG0CLR);
463 handler = handle_edge_irq;
464 name = "falledge";
465 break;
466 case IRQ_TYPE_EDGE_BOTH: /* 0:1:1 */
467 __raw_writel(1 << bit, base + IC_CFG2CLR);
468 __raw_writel(1 << bit, base + IC_CFG1SET);
469 __raw_writel(1 << bit, base + IC_CFG0SET);
470 handler = handle_edge_irq;
471 name = "bothedge";
472 break;
473 case IRQ_TYPE_LEVEL_HIGH: /* 1:0:1 */
474 __raw_writel(1 << bit, base + IC_CFG2SET);
475 __raw_writel(1 << bit, base + IC_CFG1CLR);
476 __raw_writel(1 << bit, base + IC_CFG0SET);
477 handler = handle_level_irq;
478 name = "hilevel";
479 break;
480 case IRQ_TYPE_LEVEL_LOW: /* 1:1:0 */
481 __raw_writel(1 << bit, base + IC_CFG2SET);
482 __raw_writel(1 << bit, base + IC_CFG1SET);
483 __raw_writel(1 << bit, base + IC_CFG0CLR);
484 handler = handle_level_irq;
485 name = "lowlevel";
486 break;
487 case IRQ_TYPE_NONE: /* 0:0:0 */
488 __raw_writel(1 << bit, base + IC_CFG2CLR);
489 __raw_writel(1 << bit, base + IC_CFG1CLR);
490 __raw_writel(1 << bit, base + IC_CFG0CLR);
491 break;
492 default:
493 ret = -EINVAL;
494 }
495 __irq_set_chip_handler_name_locked(d->irq, chip, handler, name);
496
497 wmb();
498
499 return ret;
500 }
501
502 /******************************************************************************/
503
504 /*
505 * au1300_gpic_chgcfg - change PIN configuration.
506 * @gpio: pin to change (0-based GPIO number from datasheet).
507 * @clr: clear all bits set in 'clr'.
508 * @set: set these bits.
509 *
510 * modifies a pins' configuration register, bits set in @clr will
511 * be cleared in the register, bits in @set will be set.
512 */
513 static inline void au1300_gpic_chgcfg(unsigned int gpio,
514 unsigned long clr,
515 unsigned long set)
516 {
517 void __iomem *r = AU1300_GPIC_ADDR;
518 unsigned long l;
519
520 r += gpio * 4; /* offset into pin config array */
521 l = __raw_readl(r + AU1300_GPIC_PINCFG);
522 l &= ~clr;
523 l |= set;
524 __raw_writel(l, r + AU1300_GPIC_PINCFG);
525 wmb();
526 }
527
528 /*
529 * au1300_pinfunc_to_gpio - assign a pin as GPIO input (GPIO ctrl).
530 * @pin: pin (0-based GPIO number from datasheet).
531 *
532 * Assigns a GPIO pin to the GPIO controller, so its level can either
533 * be read or set through the generic GPIO functions.
534 * If you need a GPOUT, use au1300_gpio_set_value(pin, 0/1).
535 * REVISIT: is this function really necessary?
536 */
537 void au1300_pinfunc_to_gpio(enum au1300_multifunc_pins gpio)
538 {
539 au1300_gpio_direction_input(gpio + AU1300_GPIO_BASE);
540 }
541 EXPORT_SYMBOL_GPL(au1300_pinfunc_to_gpio);
542
543 /*
544 * au1300_pinfunc_to_dev - assign a pin to the device function.
545 * @pin: pin (0-based GPIO number from datasheet).
546 *
547 * Assigns a GPIO pin to its associated device function; the pin will be
548 * driven by the device and not through GPIO functions.
549 */
550 void au1300_pinfunc_to_dev(enum au1300_multifunc_pins gpio)
551 {
552 void __iomem *r = AU1300_GPIC_ADDR;
553 unsigned long bit;
554
555 r += GPIC_GPIO_BANKOFF(gpio);
556 bit = GPIC_GPIO_TO_BIT(gpio);
557 __raw_writel(bit, r + AU1300_GPIC_DEVSEL);
558 wmb();
559 }
560 EXPORT_SYMBOL_GPL(au1300_pinfunc_to_dev);
561
562 /*
563 * au1300_set_irq_priority - set internal priority of IRQ.
564 * @irq: irq to set priority (linux irq number).
565 * @p: priority (0 = highest, 3 = lowest).
566 */
567 void au1300_set_irq_priority(unsigned int irq, int p)
568 {
569 irq -= ALCHEMY_GPIC_INT_BASE;
570 au1300_gpic_chgcfg(irq, GPIC_CFG_IL_MASK, GPIC_CFG_IL_SET(p));
571 }
572 EXPORT_SYMBOL_GPL(au1300_set_irq_priority);
573
574 /*
575 * au1300_set_dbdma_gpio - assign a gpio to one of the DBDMA triggers.
576 * @dchan: dbdma trigger select (0, 1).
577 * @gpio: pin to assign as trigger.
578 *
579 * DBDMA controller has 2 external trigger sources; this function
580 * assigns a GPIO to the selected trigger.
581 */
582 void au1300_set_dbdma_gpio(int dchan, unsigned int gpio)
583 {
584 unsigned long r;
585
586 if ((dchan >= 0) && (dchan <= 1)) {
587 r = __raw_readl(AU1300_GPIC_ADDR + AU1300_GPIC_DMASEL);
588 r &= ~(0xff << (8 * dchan));
589 r |= (gpio & 0x7f) << (8 * dchan);
590 __raw_writel(r, AU1300_GPIC_ADDR + AU1300_GPIC_DMASEL);
591 wmb();
592 }
593 }
594
595 static inline void gpic_pin_set_idlewake(unsigned int gpio, int allow)
596 {
597 au1300_gpic_chgcfg(gpio, GPIC_CFG_IDLEWAKE,
598 allow ? GPIC_CFG_IDLEWAKE : 0);
599 }
600
601 static void au1300_gpic_mask(struct irq_data *d)
602 {
603 void __iomem *r = AU1300_GPIC_ADDR;
604 unsigned long bit, irq = d->irq;
605
606 irq -= ALCHEMY_GPIC_INT_BASE;
607 r += GPIC_GPIO_BANKOFF(irq);
608 bit = GPIC_GPIO_TO_BIT(irq);
609 __raw_writel(bit, r + AU1300_GPIC_IDIS);
610 wmb();
611
612 gpic_pin_set_idlewake(irq, 0);
613 }
614
615 static void au1300_gpic_unmask(struct irq_data *d)
616 {
617 void __iomem *r = AU1300_GPIC_ADDR;
618 unsigned long bit, irq = d->irq;
619
620 irq -= ALCHEMY_GPIC_INT_BASE;
621
622 gpic_pin_set_idlewake(irq, 1);
623
624 r += GPIC_GPIO_BANKOFF(irq);
625 bit = GPIC_GPIO_TO_BIT(irq);
626 __raw_writel(bit, r + AU1300_GPIC_IEN);
627 wmb();
628 }
629
630 static void au1300_gpic_maskack(struct irq_data *d)
631 {
632 void __iomem *r = AU1300_GPIC_ADDR;
633 unsigned long bit, irq = d->irq;
634
635 irq -= ALCHEMY_GPIC_INT_BASE;
636 r += GPIC_GPIO_BANKOFF(irq);
637 bit = GPIC_GPIO_TO_BIT(irq);
638 __raw_writel(bit, r + AU1300_GPIC_IPEND); /* ack */
639 __raw_writel(bit, r + AU1300_GPIC_IDIS); /* mask */
640 wmb();
641
642 gpic_pin_set_idlewake(irq, 0);
643 }
644
645 static void au1300_gpic_ack(struct irq_data *d)
646 {
647 void __iomem *r = AU1300_GPIC_ADDR;
648 unsigned long bit, irq = d->irq;
649
650 irq -= ALCHEMY_GPIC_INT_BASE;
651 r += GPIC_GPIO_BANKOFF(irq);
652 bit = GPIC_GPIO_TO_BIT(irq);
653 __raw_writel(bit, r + AU1300_GPIC_IPEND); /* ack */
654 wmb();
655 }
656
657 static struct irq_chip au1300_gpic = {
658 .name = "GPIOINT",
659 .irq_ack = au1300_gpic_ack,
660 .irq_mask = au1300_gpic_mask,
661 .irq_mask_ack = au1300_gpic_maskack,
662 .irq_unmask = au1300_gpic_unmask,
663 .irq_set_type = au1300_gpic_settype,
664 };
665
666 static int au1300_gpic_settype(struct irq_data *d, unsigned int type)
667 {
668 unsigned long s;
669 unsigned char *name = NULL;
670 irq_flow_handler_t hdl = NULL;
671
672 switch (type) {
673 case IRQ_TYPE_LEVEL_HIGH:
674 s = GPIC_CFG_IC_LEVEL_HIGH;
675 name = "high";
676 hdl = handle_level_irq;
677 break;
678 case IRQ_TYPE_LEVEL_LOW:
679 s = GPIC_CFG_IC_LEVEL_LOW;
680 name = "low";
681 hdl = handle_level_irq;
682 break;
683 case IRQ_TYPE_EDGE_RISING:
684 s = GPIC_CFG_IC_EDGE_RISE;
685 name = "posedge";
686 hdl = handle_edge_irq;
687 break;
688 case IRQ_TYPE_EDGE_FALLING:
689 s = GPIC_CFG_IC_EDGE_FALL;
690 name = "negedge";
691 hdl = handle_edge_irq;
692 break;
693 case IRQ_TYPE_EDGE_BOTH:
694 s = GPIC_CFG_IC_EDGE_BOTH;
695 name = "bothedge";
696 hdl = handle_edge_irq;
697 break;
698 case IRQ_TYPE_NONE:
699 s = GPIC_CFG_IC_OFF;
700 name = "disabled";
701 hdl = handle_level_irq;
702 break;
703 default:
704 return -EINVAL;
705 }
706
707 __irq_set_chip_handler_name_locked(d->irq, &au1300_gpic, hdl, name);
708
709 au1300_gpic_chgcfg(d->irq - ALCHEMY_GPIC_INT_BASE, GPIC_CFG_IC_MASK, s);
710
711 return 0;
712 }
713
714 /******************************************************************************/
715
716 static inline void ic_init(void __iomem *base)
717 {
718 /* initialize interrupt controller to a safe state */
719 __raw_writel(0xffffffff, base + IC_CFG0CLR);
720 __raw_writel(0xffffffff, base + IC_CFG1CLR);
721 __raw_writel(0xffffffff, base + IC_CFG2CLR);
722 __raw_writel(0xffffffff, base + IC_MASKCLR);
723 __raw_writel(0xffffffff, base + IC_ASSIGNCLR);
724 __raw_writel(0xffffffff, base + IC_WAKECLR);
725 __raw_writel(0xffffffff, base + IC_SRCSET);
726 __raw_writel(0xffffffff, base + IC_FALLINGCLR);
727 __raw_writel(0xffffffff, base + IC_RISINGCLR);
728 __raw_writel(0x00000000, base + IC_TESTBIT);
729 wmb();
730 }
731
732 static unsigned long alchemy_gpic_pmdata[ALCHEMY_GPIC_INT_NUM + 6];
733
734 static inline void alchemy_ic_suspend_one(void __iomem *base, unsigned long *d)
735 {
736 d[0] = __raw_readl(base + IC_CFG0RD);
737 d[1] = __raw_readl(base + IC_CFG1RD);
738 d[2] = __raw_readl(base + IC_CFG2RD);
739 d[3] = __raw_readl(base + IC_SRCRD);
740 d[4] = __raw_readl(base + IC_ASSIGNRD);
741 d[5] = __raw_readl(base + IC_WAKERD);
742 d[6] = __raw_readl(base + IC_MASKRD);
743 ic_init(base); /* shut it up too while at it */
744 }
745
746 static inline void alchemy_ic_resume_one(void __iomem *base, unsigned long *d)
747 {
748 ic_init(base);
749
750 __raw_writel(d[0], base + IC_CFG0SET);
751 __raw_writel(d[1], base + IC_CFG1SET);
752 __raw_writel(d[2], base + IC_CFG2SET);
753 __raw_writel(d[3], base + IC_SRCSET);
754 __raw_writel(d[4], base + IC_ASSIGNSET);
755 __raw_writel(d[5], base + IC_WAKESET);
756 wmb();
757
758 __raw_writel(d[6], base + IC_MASKSET);
759 wmb();
760 }
761
762 static int alchemy_ic_suspend(void)
763 {
764 alchemy_ic_suspend_one((void __iomem *)KSEG1ADDR(AU1000_IC0_PHYS_ADDR),
765 alchemy_gpic_pmdata);
766 alchemy_ic_suspend_one((void __iomem *)KSEG1ADDR(AU1000_IC1_PHYS_ADDR),
767 &alchemy_gpic_pmdata[7]);
768 return 0;
769 }
770
771 static void alchemy_ic_resume(void)
772 {
773 alchemy_ic_resume_one((void __iomem *)KSEG1ADDR(AU1000_IC1_PHYS_ADDR),
774 &alchemy_gpic_pmdata[7]);
775 alchemy_ic_resume_one((void __iomem *)KSEG1ADDR(AU1000_IC0_PHYS_ADDR),
776 alchemy_gpic_pmdata);
777 }
778
779 static int alchemy_gpic_suspend(void)
780 {
781 void __iomem *base = (void __iomem *)KSEG1ADDR(AU1300_GPIC_PHYS_ADDR);
782 int i;
783
784 /* save 4 interrupt mask status registers */
785 alchemy_gpic_pmdata[0] = __raw_readl(base + AU1300_GPIC_IEN + 0x0);
786 alchemy_gpic_pmdata[1] = __raw_readl(base + AU1300_GPIC_IEN + 0x4);
787 alchemy_gpic_pmdata[2] = __raw_readl(base + AU1300_GPIC_IEN + 0x8);
788 alchemy_gpic_pmdata[3] = __raw_readl(base + AU1300_GPIC_IEN + 0xc);
789
790 /* save misc register(s) */
791 alchemy_gpic_pmdata[4] = __raw_readl(base + AU1300_GPIC_DMASEL);
792
793 /* molto silenzioso */
794 __raw_writel(~0UL, base + AU1300_GPIC_IDIS + 0x0);
795 __raw_writel(~0UL, base + AU1300_GPIC_IDIS + 0x4);
796 __raw_writel(~0UL, base + AU1300_GPIC_IDIS + 0x8);
797 __raw_writel(~0UL, base + AU1300_GPIC_IDIS + 0xc);
798 wmb();
799
800 /* save pin/int-type configuration */
801 base += AU1300_GPIC_PINCFG;
802 for (i = 0; i < ALCHEMY_GPIC_INT_NUM; i++)
803 alchemy_gpic_pmdata[i + 5] = __raw_readl(base + (i << 2));
804
805 wmb();
806
807 return 0;
808 }
809
810 static void alchemy_gpic_resume(void)
811 {
812 void __iomem *base = (void __iomem *)KSEG1ADDR(AU1300_GPIC_PHYS_ADDR);
813 int i;
814
815 /* disable all first */
816 __raw_writel(~0UL, base + AU1300_GPIC_IDIS + 0x0);
817 __raw_writel(~0UL, base + AU1300_GPIC_IDIS + 0x4);
818 __raw_writel(~0UL, base + AU1300_GPIC_IDIS + 0x8);
819 __raw_writel(~0UL, base + AU1300_GPIC_IDIS + 0xc);
820 wmb();
821
822 /* restore pin/int-type configurations */
823 base += AU1300_GPIC_PINCFG;
824 for (i = 0; i < ALCHEMY_GPIC_INT_NUM; i++)
825 __raw_writel(alchemy_gpic_pmdata[i + 5], base + (i << 2));
826 wmb();
827
828 /* restore misc register(s) */
829 base = (void __iomem *)KSEG1ADDR(AU1300_GPIC_PHYS_ADDR);
830 __raw_writel(alchemy_gpic_pmdata[4], base + AU1300_GPIC_DMASEL);
831 wmb();
832
833 /* finally restore masks */
834 __raw_writel(alchemy_gpic_pmdata[0], base + AU1300_GPIC_IEN + 0x0);
835 __raw_writel(alchemy_gpic_pmdata[1], base + AU1300_GPIC_IEN + 0x4);
836 __raw_writel(alchemy_gpic_pmdata[2], base + AU1300_GPIC_IEN + 0x8);
837 __raw_writel(alchemy_gpic_pmdata[3], base + AU1300_GPIC_IEN + 0xc);
838 wmb();
839 }
840
841 static struct syscore_ops alchemy_ic_pmops = {
842 .suspend = alchemy_ic_suspend,
843 .resume = alchemy_ic_resume,
844 };
845
846 static struct syscore_ops alchemy_gpic_pmops = {
847 .suspend = alchemy_gpic_suspend,
848 .resume = alchemy_gpic_resume,
849 };
850
851 /******************************************************************************/
852
853 /* create chained handlers for the 4 IC requests to the MIPS IRQ ctrl */
854 #define DISP(name, base, addr) \
855 static void au1000_##name##_dispatch(unsigned int irq, struct irq_desc *d) \
856 { \
857 unsigned long r = __raw_readl((void __iomem *)KSEG1ADDR(addr)); \
858 if (likely(r)) \
859 generic_handle_irq(base + __ffs(r)); \
860 else \
861 spurious_interrupt(); \
862 }
863
864 DISP(ic0r0, AU1000_INTC0_INT_BASE, AU1000_IC0_PHYS_ADDR + IC_REQ0INT)
865 DISP(ic0r1, AU1000_INTC0_INT_BASE, AU1000_IC0_PHYS_ADDR + IC_REQ1INT)
866 DISP(ic1r0, AU1000_INTC1_INT_BASE, AU1000_IC1_PHYS_ADDR + IC_REQ0INT)
867 DISP(ic1r1, AU1000_INTC1_INT_BASE, AU1000_IC1_PHYS_ADDR + IC_REQ1INT)
868
869 static void alchemy_gpic_dispatch(unsigned int irq, struct irq_desc *d)
870 {
871 int i = __raw_readl(AU1300_GPIC_ADDR + AU1300_GPIC_PRIENC);
872 generic_handle_irq(ALCHEMY_GPIC_INT_BASE + i);
873 }
874
875 /******************************************************************************/
876
877 static void __init au1000_init_irq(struct alchemy_irqmap *map)
878 {
879 unsigned int bit, irq_nr;
880 void __iomem *base;
881
882 ic_init((void __iomem *)KSEG1ADDR(AU1000_IC0_PHYS_ADDR));
883 ic_init((void __iomem *)KSEG1ADDR(AU1000_IC1_PHYS_ADDR));
884 register_syscore_ops(&alchemy_ic_pmops);
885 mips_cpu_irq_init();
886
887 /* register all 64 possible IC0+IC1 irq sources as type "none".
888 * Use set_irq_type() to set edge/level behaviour at runtime.
889 */
890 for (irq_nr = AU1000_INTC0_INT_BASE;
891 (irq_nr < AU1000_INTC0_INT_BASE + 32); irq_nr++)
892 au1x_ic_settype(irq_get_irq_data(irq_nr), IRQ_TYPE_NONE);
893
894 for (irq_nr = AU1000_INTC1_INT_BASE;
895 (irq_nr < AU1000_INTC1_INT_BASE + 32); irq_nr++)
896 au1x_ic_settype(irq_get_irq_data(irq_nr), IRQ_TYPE_NONE);
897
898 /*
899 * Initialize IC0, which is fixed per processor.
900 */
901 while (map->irq != -1) {
902 irq_nr = map->irq;
903
904 if (irq_nr >= AU1000_INTC1_INT_BASE) {
905 bit = irq_nr - AU1000_INTC1_INT_BASE;
906 base = (void __iomem *)KSEG1ADDR(AU1000_IC1_PHYS_ADDR);
907 } else {
908 bit = irq_nr - AU1000_INTC0_INT_BASE;
909 base = (void __iomem *)KSEG1ADDR(AU1000_IC0_PHYS_ADDR);
910 }
911 if (map->prio == 0)
912 __raw_writel(1 << bit, base + IC_ASSIGNSET);
913
914 au1x_ic_settype(irq_get_irq_data(irq_nr), map->type);
915 ++map;
916 }
917
918 irq_set_chained_handler(MIPS_CPU_IRQ_BASE + 2, au1000_ic0r0_dispatch);
919 irq_set_chained_handler(MIPS_CPU_IRQ_BASE + 3, au1000_ic0r1_dispatch);
920 irq_set_chained_handler(MIPS_CPU_IRQ_BASE + 4, au1000_ic1r0_dispatch);
921 irq_set_chained_handler(MIPS_CPU_IRQ_BASE + 5, au1000_ic1r1_dispatch);
922 }
923
924 static void __init alchemy_gpic_init_irq(const struct alchemy_irqmap *dints)
925 {
926 int i;
927 void __iomem *bank_base;
928
929 register_syscore_ops(&alchemy_gpic_pmops);
930 mips_cpu_irq_init();
931
932 /* disable & ack all possible interrupt sources */
933 for (i = 0; i < 4; i++) {
934 bank_base = AU1300_GPIC_ADDR + (i * 4);
935 __raw_writel(~0UL, bank_base + AU1300_GPIC_IDIS);
936 wmb();
937 __raw_writel(~0UL, bank_base + AU1300_GPIC_IPEND);
938 wmb();
939 }
940
941 /* register an irq_chip for them, with 2nd highest priority */
942 for (i = ALCHEMY_GPIC_INT_BASE; i <= ALCHEMY_GPIC_INT_LAST; i++) {
943 au1300_set_irq_priority(i, 1);
944 au1300_gpic_settype(irq_get_irq_data(i), IRQ_TYPE_NONE);
945 }
946
947 /* setup known on-chip sources */
948 while ((i = dints->irq) != -1) {
949 au1300_gpic_settype(irq_get_irq_data(i), dints->type);
950 au1300_set_irq_priority(i, dints->prio);
951
952 if (dints->internal)
953 au1300_pinfunc_to_dev(i - ALCHEMY_GPIC_INT_BASE);
954
955 dints++;
956 }
957
958 irq_set_chained_handler(MIPS_CPU_IRQ_BASE + 2, alchemy_gpic_dispatch);
959 irq_set_chained_handler(MIPS_CPU_IRQ_BASE + 3, alchemy_gpic_dispatch);
960 irq_set_chained_handler(MIPS_CPU_IRQ_BASE + 4, alchemy_gpic_dispatch);
961 irq_set_chained_handler(MIPS_CPU_IRQ_BASE + 5, alchemy_gpic_dispatch);
962 }
963
964 /******************************************************************************/
965
966 void __init arch_init_irq(void)
967 {
968 switch (alchemy_get_cputype()) {
969 case ALCHEMY_CPU_AU1000:
970 au1000_init_irq(au1000_irqmap);
971 break;
972 case ALCHEMY_CPU_AU1500:
973 au1000_init_irq(au1500_irqmap);
974 break;
975 case ALCHEMY_CPU_AU1100:
976 au1000_init_irq(au1100_irqmap);
977 break;
978 case ALCHEMY_CPU_AU1550:
979 au1000_init_irq(au1550_irqmap);
980 break;
981 case ALCHEMY_CPU_AU1200:
982 au1000_init_irq(au1200_irqmap);
983 break;
984 case ALCHEMY_CPU_AU1300:
985 alchemy_gpic_init_irq(au1300_irqmap);
986 break;
987 default:
988 pr_err("unknown Alchemy IRQ core\n");
989 break;
990 }
991 }
992
993 asmlinkage void plat_irq_dispatch(void)
994 {
995 unsigned long r = (read_c0_status() & read_c0_cause()) >> 8;
996 do_IRQ(MIPS_CPU_IRQ_BASE + __ffs(r & 0xff));
997 }
Linux with added FPC-III support