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1 | /* |
2 | * Copyright (C) 2007 Google, Inc. | |
3 | * Copyright (c) 2009, Code Aurora Forum. All rights reserved. | |
4 | * | |
5 | * This software is licensed under the terms of the GNU General Public | |
6 | * License version 2, as published by the Free Software Foundation, and | |
7 | * may be copied, distributed, and modified under those terms. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | * | |
14 | */ | |
15 | ||
16 | #include <linux/init.h> | |
17 | #include <linux/module.h> | |
18 | #include <linux/sched.h> | |
19 | #include <linux/interrupt.h> | |
20 | #include <linux/ptrace.h> | |
21 | #include <linux/timer.h> | |
22 | #include <linux/irq.h> | |
23 | #include <linux/io.h> | |
24 | ||
25 | #include <asm/cacheflush.h> | |
26 | ||
27 | #include <mach/hardware.h> | |
28 | ||
29 | #include <mach/msm_iomap.h> | |
30 | ||
31 | #include "smd_private.h" | |
32 | ||
33 | enum { | |
34 | IRQ_DEBUG_SLEEP_INT_TRIGGER = 1U << 0, | |
35 | IRQ_DEBUG_SLEEP_INT = 1U << 1, | |
36 | IRQ_DEBUG_SLEEP_ABORT = 1U << 2, | |
37 | IRQ_DEBUG_SLEEP = 1U << 3, | |
38 | IRQ_DEBUG_SLEEP_REQUEST = 1U << 4, | |
39 | }; | |
40 | static int msm_irq_debug_mask; | |
41 | module_param_named(debug_mask, msm_irq_debug_mask, int, | |
42 | S_IRUGO | S_IWUSR | S_IWGRP); | |
43 | ||
44 | #define VIC_REG(off) (MSM_VIC_BASE + (off)) | |
45 | #define VIC_INT_TO_REG_ADDR(base, irq) (base + (irq / 32) * 4) | |
46 | #define VIC_INT_TO_REG_INDEX(irq) ((irq >> 5) & 3) | |
47 | ||
48 | #define VIC_INT_SELECT0 VIC_REG(0x0000) /* 1: FIQ, 0: IRQ */ | |
49 | #define VIC_INT_SELECT1 VIC_REG(0x0004) /* 1: FIQ, 0: IRQ */ | |
50 | #define VIC_INT_SELECT2 VIC_REG(0x0008) /* 1: FIQ, 0: IRQ */ | |
51 | #define VIC_INT_SELECT3 VIC_REG(0x000C) /* 1: FIQ, 0: IRQ */ | |
52 | #define VIC_INT_EN0 VIC_REG(0x0010) | |
53 | #define VIC_INT_EN1 VIC_REG(0x0014) | |
54 | #define VIC_INT_EN2 VIC_REG(0x0018) | |
55 | #define VIC_INT_EN3 VIC_REG(0x001C) | |
56 | #define VIC_INT_ENCLEAR0 VIC_REG(0x0020) | |
57 | #define VIC_INT_ENCLEAR1 VIC_REG(0x0024) | |
58 | #define VIC_INT_ENCLEAR2 VIC_REG(0x0028) | |
59 | #define VIC_INT_ENCLEAR3 VIC_REG(0x002C) | |
60 | #define VIC_INT_ENSET0 VIC_REG(0x0030) | |
61 | #define VIC_INT_ENSET1 VIC_REG(0x0034) | |
62 | #define VIC_INT_ENSET2 VIC_REG(0x0038) | |
63 | #define VIC_INT_ENSET3 VIC_REG(0x003C) | |
64 | #define VIC_INT_TYPE0 VIC_REG(0x0040) /* 1: EDGE, 0: LEVEL */ | |
65 | #define VIC_INT_TYPE1 VIC_REG(0x0044) /* 1: EDGE, 0: LEVEL */ | |
66 | #define VIC_INT_TYPE2 VIC_REG(0x0048) /* 1: EDGE, 0: LEVEL */ | |
67 | #define VIC_INT_TYPE3 VIC_REG(0x004C) /* 1: EDGE, 0: LEVEL */ | |
68 | #define VIC_INT_POLARITY0 VIC_REG(0x0050) /* 1: NEG, 0: POS */ | |
69 | #define VIC_INT_POLARITY1 VIC_REG(0x0054) /* 1: NEG, 0: POS */ | |
70 | #define VIC_INT_POLARITY2 VIC_REG(0x0058) /* 1: NEG, 0: POS */ | |
71 | #define VIC_INT_POLARITY3 VIC_REG(0x005C) /* 1: NEG, 0: POS */ | |
72 | #define VIC_NO_PEND_VAL VIC_REG(0x0060) | |
73 | ||
74 | #if defined(CONFIG_ARCH_MSM_SCORPION) | |
75 | #define VIC_NO_PEND_VAL_FIQ VIC_REG(0x0064) | |
76 | #define VIC_INT_MASTEREN VIC_REG(0x0068) /* 1: IRQ, 2: FIQ */ | |
77 | #define VIC_CONFIG VIC_REG(0x006C) /* 1: USE SC VIC */ | |
78 | #else | |
79 | #define VIC_INT_MASTEREN VIC_REG(0x0064) /* 1: IRQ, 2: FIQ */ | |
80 | #define VIC_PROTECTION VIC_REG(0x006C) /* 1: ENABLE */ | |
81 | #define VIC_CONFIG VIC_REG(0x0068) /* 1: USE ARM1136 VIC */ | |
82 | #endif | |
83 | ||
84 | #define VIC_IRQ_STATUS0 VIC_REG(0x0080) | |
85 | #define VIC_IRQ_STATUS1 VIC_REG(0x0084) | |
86 | #define VIC_IRQ_STATUS2 VIC_REG(0x0088) | |
87 | #define VIC_IRQ_STATUS3 VIC_REG(0x008C) | |
88 | #define VIC_FIQ_STATUS0 VIC_REG(0x0090) | |
89 | #define VIC_FIQ_STATUS1 VIC_REG(0x0094) | |
90 | #define VIC_FIQ_STATUS2 VIC_REG(0x0098) | |
91 | #define VIC_FIQ_STATUS3 VIC_REG(0x009C) | |
92 | #define VIC_RAW_STATUS0 VIC_REG(0x00A0) | |
93 | #define VIC_RAW_STATUS1 VIC_REG(0x00A4) | |
94 | #define VIC_RAW_STATUS2 VIC_REG(0x00A8) | |
95 | #define VIC_RAW_STATUS3 VIC_REG(0x00AC) | |
96 | #define VIC_INT_CLEAR0 VIC_REG(0x00B0) | |
97 | #define VIC_INT_CLEAR1 VIC_REG(0x00B4) | |
98 | #define VIC_INT_CLEAR2 VIC_REG(0x00B8) | |
99 | #define VIC_INT_CLEAR3 VIC_REG(0x00BC) | |
100 | #define VIC_SOFTINT0 VIC_REG(0x00C0) | |
101 | #define VIC_SOFTINT1 VIC_REG(0x00C4) | |
102 | #define VIC_SOFTINT2 VIC_REG(0x00C8) | |
103 | #define VIC_SOFTINT3 VIC_REG(0x00CC) | |
104 | #define VIC_IRQ_VEC_RD VIC_REG(0x00D0) /* pending int # */ | |
105 | #define VIC_IRQ_VEC_PEND_RD VIC_REG(0x00D4) /* pending vector addr */ | |
106 | #define VIC_IRQ_VEC_WR VIC_REG(0x00D8) | |
107 | ||
108 | #if defined(CONFIG_ARCH_MSM_SCORPION) | |
109 | #define VIC_FIQ_VEC_RD VIC_REG(0x00DC) | |
110 | #define VIC_FIQ_VEC_PEND_RD VIC_REG(0x00E0) | |
111 | #define VIC_FIQ_VEC_WR VIC_REG(0x00E4) | |
112 | #define VIC_IRQ_IN_SERVICE VIC_REG(0x00E8) | |
113 | #define VIC_IRQ_IN_STACK VIC_REG(0x00EC) | |
114 | #define VIC_FIQ_IN_SERVICE VIC_REG(0x00F0) | |
115 | #define VIC_FIQ_IN_STACK VIC_REG(0x00F4) | |
116 | #define VIC_TEST_BUS_SEL VIC_REG(0x00F8) | |
117 | #define VIC_IRQ_CTRL_CONFIG VIC_REG(0x00FC) | |
118 | #else | |
119 | #define VIC_IRQ_IN_SERVICE VIC_REG(0x00E0) | |
120 | #define VIC_IRQ_IN_STACK VIC_REG(0x00E4) | |
121 | #define VIC_TEST_BUS_SEL VIC_REG(0x00E8) | |
122 | #endif | |
123 | ||
124 | #define VIC_VECTPRIORITY(n) VIC_REG(0x0200+((n) * 4)) | |
125 | #define VIC_VECTADDR(n) VIC_REG(0x0400+((n) * 4)) | |
126 | ||
127 | #if defined(CONFIG_ARCH_MSM7X30) | |
128 | #define VIC_NUM_REGS 4 | |
129 | #else | |
130 | #define VIC_NUM_REGS 2 | |
131 | #endif | |
132 | ||
133 | #if VIC_NUM_REGS == 2 | |
134 | #define DPRINT_REGS(base_reg, format, ...) \ | |
135 | printk(KERN_INFO format " %x %x\n", ##__VA_ARGS__, \ | |
136 | readl(base_reg ## 0), readl(base_reg ## 1)) | |
137 | #define DPRINT_ARRAY(array, format, ...) \ | |
138 | printk(KERN_INFO format " %x %x\n", ##__VA_ARGS__, \ | |
139 | array[0], array[1]) | |
140 | #elif VIC_NUM_REGS == 4 | |
141 | #define DPRINT_REGS(base_reg, format, ...) \ | |
142 | printk(KERN_INFO format " %x %x %x %x\n", ##__VA_ARGS__, \ | |
143 | readl(base_reg ## 0), readl(base_reg ## 1), \ | |
144 | readl(base_reg ## 2), readl(base_reg ## 3)) | |
145 | #define DPRINT_ARRAY(array, format, ...) \ | |
146 | printk(KERN_INFO format " %x %x %x %x\n", ##__VA_ARGS__, \ | |
147 | array[0], array[1], \ | |
148 | array[2], array[3]) | |
149 | #else | |
150 | #error "VIC_NUM_REGS set to illegal value" | |
151 | #endif | |
152 | ||
153 | static uint32_t msm_irq_smsm_wake_enable[2]; | |
154 | static struct { | |
155 | uint32_t int_en[2]; | |
156 | uint32_t int_type; | |
157 | uint32_t int_polarity; | |
158 | uint32_t int_select; | |
159 | } msm_irq_shadow_reg[VIC_NUM_REGS]; | |
160 | static uint32_t msm_irq_idle_disable[VIC_NUM_REGS]; | |
161 | ||
162 | #define SMSM_FAKE_IRQ (0xff) | |
163 | static uint8_t msm_irq_to_smsm[NR_IRQS] = { | |
164 | [INT_MDDI_EXT] = 1, | |
165 | [INT_MDDI_PRI] = 2, | |
166 | [INT_MDDI_CLIENT] = 3, | |
167 | [INT_USB_OTG] = 4, | |
168 | ||
169 | [INT_PWB_I2C] = 5, | |
170 | [INT_SDC1_0] = 6, | |
171 | [INT_SDC1_1] = 7, | |
172 | [INT_SDC2_0] = 8, | |
173 | ||
174 | [INT_SDC2_1] = 9, | |
175 | [INT_ADSP_A9_A11] = 10, | |
176 | [INT_UART1] = 11, | |
177 | [INT_UART2] = 12, | |
178 | ||
179 | [INT_UART3] = 13, | |
180 | [INT_UART1_RX] = 14, | |
181 | [INT_UART2_RX] = 15, | |
182 | [INT_UART3_RX] = 16, | |
183 | ||
184 | [INT_UART1DM_IRQ] = 17, | |
185 | [INT_UART1DM_RX] = 18, | |
186 | [INT_KEYSENSE] = 19, | |
187 | #if !defined(CONFIG_ARCH_MSM7X30) | |
188 | [INT_AD_HSSD] = 20, | |
189 | #endif | |
190 | ||
191 | [INT_NAND_WR_ER_DONE] = 21, | |
192 | [INT_NAND_OP_DONE] = 22, | |
193 | [INT_TCHSCRN1] = 23, | |
194 | [INT_TCHSCRN2] = 24, | |
195 | ||
196 | [INT_TCHSCRN_SSBI] = 25, | |
197 | [INT_USB_HS] = 26, | |
198 | [INT_UART2DM_RX] = 27, | |
199 | [INT_UART2DM_IRQ] = 28, | |
200 | ||
201 | [INT_SDC4_1] = 29, | |
202 | [INT_SDC4_0] = 30, | |
203 | [INT_SDC3_1] = 31, | |
204 | [INT_SDC3_0] = 32, | |
205 | ||
206 | /* fake wakeup interrupts */ | |
207 | [INT_GPIO_GROUP1] = SMSM_FAKE_IRQ, | |
208 | [INT_GPIO_GROUP2] = SMSM_FAKE_IRQ, | |
209 | [INT_A9_M2A_0] = SMSM_FAKE_IRQ, | |
210 | [INT_A9_M2A_1] = SMSM_FAKE_IRQ, | |
211 | [INT_A9_M2A_5] = SMSM_FAKE_IRQ, | |
212 | [INT_GP_TIMER_EXP] = SMSM_FAKE_IRQ, | |
213 | [INT_DEBUG_TIMER_EXP] = SMSM_FAKE_IRQ, | |
214 | [INT_ADSP_A11] = SMSM_FAKE_IRQ, | |
215 | #ifdef CONFIG_ARCH_QSD8X50 | |
216 | [INT_SIRC_0] = SMSM_FAKE_IRQ, | |
217 | [INT_SIRC_1] = SMSM_FAKE_IRQ, | |
218 | #endif | |
219 | }; | |
220 | ||
221 | static inline void msm_irq_write_all_regs(void __iomem *base, unsigned int val) | |
222 | { | |
223 | int i; | |
224 | ||
225 | for (i = 0; i < VIC_NUM_REGS; i++) | |
226 | writel(val, base + (i * 4)); | |
227 | } | |
228 | ||
229 | static void msm_irq_ack(unsigned int irq) | |
230 | { | |
231 | void __iomem *reg = VIC_INT_TO_REG_ADDR(VIC_INT_CLEAR0, irq); | |
232 | irq = 1 << (irq & 31); | |
233 | writel(irq, reg); | |
234 | } | |
235 | ||
236 | static void msm_irq_mask(unsigned int irq) | |
237 | { | |
238 | void __iomem *reg = VIC_INT_TO_REG_ADDR(VIC_INT_ENCLEAR0, irq); | |
239 | unsigned index = VIC_INT_TO_REG_INDEX(irq); | |
240 | uint32_t mask = 1UL << (irq & 31); | |
241 | int smsm_irq = msm_irq_to_smsm[irq]; | |
242 | ||
243 | msm_irq_shadow_reg[index].int_en[0] &= ~mask; | |
244 | writel(mask, reg); | |
245 | if (smsm_irq == 0) | |
246 | msm_irq_idle_disable[index] &= ~mask; | |
247 | else { | |
248 | mask = 1UL << (smsm_irq - 1); | |
249 | msm_irq_smsm_wake_enable[0] &= ~mask; | |
250 | } | |
251 | } | |
252 | ||
253 | static void msm_irq_unmask(unsigned int irq) | |
254 | { | |
255 | void __iomem *reg = VIC_INT_TO_REG_ADDR(VIC_INT_ENSET0, irq); | |
256 | unsigned index = VIC_INT_TO_REG_INDEX(irq); | |
257 | uint32_t mask = 1UL << (irq & 31); | |
258 | int smsm_irq = msm_irq_to_smsm[irq]; | |
259 | ||
260 | msm_irq_shadow_reg[index].int_en[0] |= mask; | |
261 | writel(mask, reg); | |
262 | ||
263 | if (smsm_irq == 0) | |
264 | msm_irq_idle_disable[index] |= mask; | |
265 | else { | |
266 | mask = 1UL << (smsm_irq - 1); | |
267 | msm_irq_smsm_wake_enable[0] |= mask; | |
268 | } | |
269 | } | |
270 | ||
271 | static int msm_irq_set_wake(unsigned int irq, unsigned int on) | |
272 | { | |
273 | unsigned index = VIC_INT_TO_REG_INDEX(irq); | |
274 | uint32_t mask = 1UL << (irq & 31); | |
275 | int smsm_irq = msm_irq_to_smsm[irq]; | |
276 | ||
277 | if (smsm_irq == 0) { | |
278 | printk(KERN_ERR "msm_irq_set_wake: bad wakeup irq %d\n", irq); | |
279 | return -EINVAL; | |
280 | } | |
281 | if (on) | |
282 | msm_irq_shadow_reg[index].int_en[1] |= mask; | |
283 | else | |
284 | msm_irq_shadow_reg[index].int_en[1] &= ~mask; | |
285 | ||
286 | if (smsm_irq == SMSM_FAKE_IRQ) | |
287 | return 0; | |
288 | ||
289 | mask = 1UL << (smsm_irq - 1); | |
290 | if (on) | |
291 | msm_irq_smsm_wake_enable[1] |= mask; | |
292 | else | |
293 | msm_irq_smsm_wake_enable[1] &= ~mask; | |
294 | return 0; | |
295 | } | |
296 | ||
297 | static int msm_irq_set_type(unsigned int irq, unsigned int flow_type) | |
298 | { | |
299 | void __iomem *treg = VIC_INT_TO_REG_ADDR(VIC_INT_TYPE0, irq); | |
300 | void __iomem *preg = VIC_INT_TO_REG_ADDR(VIC_INT_POLARITY0, irq); | |
301 | unsigned index = VIC_INT_TO_REG_INDEX(irq); | |
302 | int b = 1 << (irq & 31); | |
303 | uint32_t polarity; | |
304 | uint32_t type; | |
305 | ||
306 | polarity = msm_irq_shadow_reg[index].int_polarity; | |
307 | if (flow_type & (IRQF_TRIGGER_FALLING | IRQF_TRIGGER_LOW)) | |
308 | polarity |= b; | |
309 | if (flow_type & (IRQF_TRIGGER_RISING | IRQF_TRIGGER_HIGH)) | |
310 | polarity &= ~b; | |
311 | writel(polarity, preg); | |
312 | msm_irq_shadow_reg[index].int_polarity = polarity; | |
313 | ||
314 | type = msm_irq_shadow_reg[index].int_type; | |
315 | if (flow_type & (IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING)) { | |
316 | type |= b; | |
317 | irq_desc[irq].handle_irq = handle_edge_irq; | |
318 | } | |
319 | if (flow_type & (IRQF_TRIGGER_HIGH | IRQF_TRIGGER_LOW)) { | |
320 | type &= ~b; | |
321 | irq_desc[irq].handle_irq = handle_level_irq; | |
322 | } | |
323 | writel(type, treg); | |
324 | msm_irq_shadow_reg[index].int_type = type; | |
325 | return 0; | |
326 | } | |
327 | ||
328 | static struct irq_chip msm_irq_chip = { | |
329 | .name = "msm", | |
330 | .disable = msm_irq_mask, | |
331 | .ack = msm_irq_ack, | |
332 | .mask = msm_irq_mask, | |
333 | .unmask = msm_irq_unmask, | |
334 | .set_wake = msm_irq_set_wake, | |
335 | .set_type = msm_irq_set_type, | |
336 | }; | |
337 | ||
338 | void __init msm_init_irq(void) | |
339 | { | |
340 | unsigned n; | |
341 | ||
342 | /* select level interrupts */ | |
343 | msm_irq_write_all_regs(VIC_INT_TYPE0, 0); | |
344 | ||
345 | /* select highlevel interrupts */ | |
346 | msm_irq_write_all_regs(VIC_INT_POLARITY0, 0); | |
347 | ||
348 | /* select IRQ for all INTs */ | |
349 | msm_irq_write_all_regs(VIC_INT_SELECT0, 0); | |
350 | ||
351 | /* disable all INTs */ | |
352 | msm_irq_write_all_regs(VIC_INT_EN0, 0); | |
353 | ||
354 | /* don't use vic */ | |
355 | writel(0, VIC_CONFIG); | |
356 | ||
357 | /* enable interrupt controller */ | |
358 | writel(3, VIC_INT_MASTEREN); | |
359 | ||
360 | for (n = 0; n < NR_MSM_IRQS; n++) { | |
361 | set_irq_chip(n, &msm_irq_chip); | |
362 | set_irq_handler(n, handle_level_irq); | |
363 | set_irq_flags(n, IRQF_VALID); | |
364 | } | |
365 | } |