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Merge tag 'dt-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / arch / arm / mach-exynos / common.c
1 /*
2 * Copyright (c) 2010-2011 Samsung Electronics Co., Ltd.
3 * http://www.samsung.com
4 *
5 * Common Codes for EXYNOS
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 */
11
12 #include <linux/kernel.h>
13 #include <linux/interrupt.h>
14 #include <linux/irq.h>
15 #include <linux/irqchip.h>
16 #include <linux/io.h>
17 #include <linux/device.h>
18 #include <linux/gpio.h>
19 #include <linux/sched.h>
20 #include <linux/serial_core.h>
21 #include <linux/of.h>
22 #include <linux/of_fdt.h>
23 #include <linux/of_irq.h>
24 #include <linux/export.h>
25 #include <linux/irqdomain.h>
26 #include <linux/of_address.h>
27 #include <linux/irqchip/arm-gic.h>
28 #include <linux/irqchip/chained_irq.h>
29
30 #include <asm/proc-fns.h>
31 #include <asm/exception.h>
32 #include <asm/hardware/cache-l2x0.h>
33 #include <asm/mach/map.h>
34 #include <asm/mach/irq.h>
35 #include <asm/cacheflush.h>
36
37 #include <mach/regs-irq.h>
38 #include <mach/regs-pmu.h>
39 #include <mach/regs-gpio.h>
40
41 #include <plat/cpu.h>
42 #include <plat/clock.h>
43 #include <plat/devs.h>
44 #include <plat/pm.h>
45 #include <plat/sdhci.h>
46 #include <plat/gpio-cfg.h>
47 #include <plat/adc-core.h>
48 #include <plat/fb-core.h>
49 #include <plat/fimc-core.h>
50 #include <plat/iic-core.h>
51 #include <plat/tv-core.h>
52 #include <plat/spi-core.h>
53 #include <plat/regs-serial.h>
54
55 #include "common.h"
56 #define L2_AUX_VAL 0x7C470001
57 #define L2_AUX_MASK 0xC200ffff
58
59 static const char name_exynos4210[] = "EXYNOS4210";
60 static const char name_exynos4212[] = "EXYNOS4212";
61 static const char name_exynos4412[] = "EXYNOS4412";
62 static const char name_exynos5250[] = "EXYNOS5250";
63 static const char name_exynos5440[] = "EXYNOS5440";
64
65 static void exynos4_map_io(void);
66 static void exynos5_map_io(void);
67 static void exynos5440_map_io(void);
68 static void exynos4_init_clocks(int xtal);
69 static void exynos5_init_clocks(int xtal);
70 static void exynos4_init_uarts(struct s3c2410_uartcfg *cfg, int no);
71 static int exynos_init(void);
72
73 static struct cpu_table cpu_ids[] __initdata = {
74 {
75 .idcode = EXYNOS4210_CPU_ID,
76 .idmask = EXYNOS4_CPU_MASK,
77 .map_io = exynos4_map_io,
78 .init_clocks = exynos4_init_clocks,
79 .init_uarts = exynos4_init_uarts,
80 .init = exynos_init,
81 .name = name_exynos4210,
82 }, {
83 .idcode = EXYNOS4212_CPU_ID,
84 .idmask = EXYNOS4_CPU_MASK,
85 .map_io = exynos4_map_io,
86 .init_clocks = exynos4_init_clocks,
87 .init_uarts = exynos4_init_uarts,
88 .init = exynos_init,
89 .name = name_exynos4212,
90 }, {
91 .idcode = EXYNOS4412_CPU_ID,
92 .idmask = EXYNOS4_CPU_MASK,
93 .map_io = exynos4_map_io,
94 .init_clocks = exynos4_init_clocks,
95 .init_uarts = exynos4_init_uarts,
96 .init = exynos_init,
97 .name = name_exynos4412,
98 }, {
99 .idcode = EXYNOS5250_SOC_ID,
100 .idmask = EXYNOS5_SOC_MASK,
101 .map_io = exynos5_map_io,
102 .init_clocks = exynos5_init_clocks,
103 .init = exynos_init,
104 .name = name_exynos5250,
105 }, {
106 .idcode = EXYNOS5440_SOC_ID,
107 .idmask = EXYNOS5_SOC_MASK,
108 .map_io = exynos5440_map_io,
109 .init = exynos_init,
110 .name = name_exynos5440,
111 },
112 };
113
114 /* Initial IO mappings */
115
116 static struct map_desc exynos_iodesc[] __initdata = {
117 {
118 .virtual = (unsigned long)S5P_VA_CHIPID,
119 .pfn = __phys_to_pfn(EXYNOS_PA_CHIPID),
120 .length = SZ_4K,
121 .type = MT_DEVICE,
122 },
123 };
124
125 #ifdef CONFIG_ARCH_EXYNOS5
126 static struct map_desc exynos5440_iodesc[] __initdata = {
127 {
128 .virtual = (unsigned long)S5P_VA_CHIPID,
129 .pfn = __phys_to_pfn(EXYNOS5440_PA_CHIPID),
130 .length = SZ_4K,
131 .type = MT_DEVICE,
132 },
133 };
134 #endif
135
136 static struct map_desc exynos4_iodesc[] __initdata = {
137 {
138 .virtual = (unsigned long)S3C_VA_SYS,
139 .pfn = __phys_to_pfn(EXYNOS4_PA_SYSCON),
140 .length = SZ_64K,
141 .type = MT_DEVICE,
142 }, {
143 .virtual = (unsigned long)S3C_VA_TIMER,
144 .pfn = __phys_to_pfn(EXYNOS4_PA_TIMER),
145 .length = SZ_16K,
146 .type = MT_DEVICE,
147 }, {
148 .virtual = (unsigned long)S3C_VA_WATCHDOG,
149 .pfn = __phys_to_pfn(EXYNOS4_PA_WATCHDOG),
150 .length = SZ_4K,
151 .type = MT_DEVICE,
152 }, {
153 .virtual = (unsigned long)S5P_VA_SROMC,
154 .pfn = __phys_to_pfn(EXYNOS4_PA_SROMC),
155 .length = SZ_4K,
156 .type = MT_DEVICE,
157 }, {
158 .virtual = (unsigned long)S5P_VA_SYSTIMER,
159 .pfn = __phys_to_pfn(EXYNOS4_PA_SYSTIMER),
160 .length = SZ_4K,
161 .type = MT_DEVICE,
162 }, {
163 .virtual = (unsigned long)S5P_VA_PMU,
164 .pfn = __phys_to_pfn(EXYNOS4_PA_PMU),
165 .length = SZ_64K,
166 .type = MT_DEVICE,
167 }, {
168 .virtual = (unsigned long)S5P_VA_COMBINER_BASE,
169 .pfn = __phys_to_pfn(EXYNOS4_PA_COMBINER),
170 .length = SZ_4K,
171 .type = MT_DEVICE,
172 }, {
173 .virtual = (unsigned long)S5P_VA_GIC_CPU,
174 .pfn = __phys_to_pfn(EXYNOS4_PA_GIC_CPU),
175 .length = SZ_64K,
176 .type = MT_DEVICE,
177 }, {
178 .virtual = (unsigned long)S5P_VA_GIC_DIST,
179 .pfn = __phys_to_pfn(EXYNOS4_PA_GIC_DIST),
180 .length = SZ_64K,
181 .type = MT_DEVICE,
182 }, {
183 .virtual = (unsigned long)S3C_VA_UART,
184 .pfn = __phys_to_pfn(EXYNOS4_PA_UART),
185 .length = SZ_512K,
186 .type = MT_DEVICE,
187 }, {
188 .virtual = (unsigned long)S5P_VA_CMU,
189 .pfn = __phys_to_pfn(EXYNOS4_PA_CMU),
190 .length = SZ_128K,
191 .type = MT_DEVICE,
192 }, {
193 .virtual = (unsigned long)S5P_VA_COREPERI_BASE,
194 .pfn = __phys_to_pfn(EXYNOS4_PA_COREPERI),
195 .length = SZ_8K,
196 .type = MT_DEVICE,
197 }, {
198 .virtual = (unsigned long)S5P_VA_L2CC,
199 .pfn = __phys_to_pfn(EXYNOS4_PA_L2CC),
200 .length = SZ_4K,
201 .type = MT_DEVICE,
202 }, {
203 .virtual = (unsigned long)S5P_VA_DMC0,
204 .pfn = __phys_to_pfn(EXYNOS4_PA_DMC0),
205 .length = SZ_64K,
206 .type = MT_DEVICE,
207 }, {
208 .virtual = (unsigned long)S5P_VA_DMC1,
209 .pfn = __phys_to_pfn(EXYNOS4_PA_DMC1),
210 .length = SZ_64K,
211 .type = MT_DEVICE,
212 }, {
213 .virtual = (unsigned long)S3C_VA_USB_HSPHY,
214 .pfn = __phys_to_pfn(EXYNOS4_PA_HSPHY),
215 .length = SZ_4K,
216 .type = MT_DEVICE,
217 },
218 };
219
220 static struct map_desc exynos4_iodesc0[] __initdata = {
221 {
222 .virtual = (unsigned long)S5P_VA_SYSRAM,
223 .pfn = __phys_to_pfn(EXYNOS4_PA_SYSRAM0),
224 .length = SZ_4K,
225 .type = MT_DEVICE,
226 },
227 };
228
229 static struct map_desc exynos4_iodesc1[] __initdata = {
230 {
231 .virtual = (unsigned long)S5P_VA_SYSRAM,
232 .pfn = __phys_to_pfn(EXYNOS4_PA_SYSRAM1),
233 .length = SZ_4K,
234 .type = MT_DEVICE,
235 },
236 };
237
238 static struct map_desc exynos5_iodesc[] __initdata = {
239 {
240 .virtual = (unsigned long)S3C_VA_SYS,
241 .pfn = __phys_to_pfn(EXYNOS5_PA_SYSCON),
242 .length = SZ_64K,
243 .type = MT_DEVICE,
244 }, {
245 .virtual = (unsigned long)S3C_VA_TIMER,
246 .pfn = __phys_to_pfn(EXYNOS5_PA_TIMER),
247 .length = SZ_16K,
248 .type = MT_DEVICE,
249 }, {
250 .virtual = (unsigned long)S3C_VA_WATCHDOG,
251 .pfn = __phys_to_pfn(EXYNOS5_PA_WATCHDOG),
252 .length = SZ_4K,
253 .type = MT_DEVICE,
254 }, {
255 .virtual = (unsigned long)S5P_VA_SROMC,
256 .pfn = __phys_to_pfn(EXYNOS5_PA_SROMC),
257 .length = SZ_4K,
258 .type = MT_DEVICE,
259 }, {
260 .virtual = (unsigned long)S5P_VA_SYSTIMER,
261 .pfn = __phys_to_pfn(EXYNOS5_PA_SYSTIMER),
262 .length = SZ_4K,
263 .type = MT_DEVICE,
264 }, {
265 .virtual = (unsigned long)S5P_VA_SYSRAM,
266 .pfn = __phys_to_pfn(EXYNOS5_PA_SYSRAM),
267 .length = SZ_4K,
268 .type = MT_DEVICE,
269 }, {
270 .virtual = (unsigned long)S5P_VA_CMU,
271 .pfn = __phys_to_pfn(EXYNOS5_PA_CMU),
272 .length = 144 * SZ_1K,
273 .type = MT_DEVICE,
274 }, {
275 .virtual = (unsigned long)S5P_VA_PMU,
276 .pfn = __phys_to_pfn(EXYNOS5_PA_PMU),
277 .length = SZ_64K,
278 .type = MT_DEVICE,
279 }, {
280 .virtual = (unsigned long)S3C_VA_UART,
281 .pfn = __phys_to_pfn(EXYNOS5_PA_UART),
282 .length = SZ_512K,
283 .type = MT_DEVICE,
284 },
285 };
286
287 static struct map_desc exynos5440_iodesc0[] __initdata = {
288 {
289 .virtual = (unsigned long)S3C_VA_UART,
290 .pfn = __phys_to_pfn(EXYNOS5440_PA_UART0),
291 .length = SZ_512K,
292 .type = MT_DEVICE,
293 },
294 };
295
296 void exynos4_restart(char mode, const char *cmd)
297 {
298 __raw_writel(0x1, S5P_SWRESET);
299 }
300
301 void exynos5_restart(char mode, const char *cmd)
302 {
303 struct device_node *np;
304 u32 val;
305 void __iomem *addr;
306
307 if (of_machine_is_compatible("samsung,exynos5250")) {
308 val = 0x1;
309 addr = EXYNOS_SWRESET;
310 } else if (of_machine_is_compatible("samsung,exynos5440")) {
311 np = of_find_compatible_node(NULL, NULL, "samsung,exynos5440-clock");
312 addr = of_iomap(np, 0) + 0xcc;
313 val = (0xfff << 20) | (0x1 << 16);
314 } else {
315 pr_err("%s: cannot support non-DT\n", __func__);
316 return;
317 }
318
319 __raw_writel(val, addr);
320 }
321
322 void __init exynos_init_late(void)
323 {
324 if (of_machine_is_compatible("samsung,exynos5440"))
325 /* to be supported later */
326 return;
327
328 exynos_pm_late_initcall();
329 }
330
331 /*
332 * exynos_map_io
333 *
334 * register the standard cpu IO areas
335 */
336
337 void __init exynos_init_io(struct map_desc *mach_desc, int size)
338 {
339 struct map_desc *iodesc = exynos_iodesc;
340 int iodesc_sz = ARRAY_SIZE(exynos_iodesc);
341 #if defined(CONFIG_OF) && defined(CONFIG_ARCH_EXYNOS5)
342 unsigned long root = of_get_flat_dt_root();
343
344 /* initialize the io descriptors we need for initialization */
345 if (of_flat_dt_is_compatible(root, "samsung,exynos5440")) {
346 iodesc = exynos5440_iodesc;
347 iodesc_sz = ARRAY_SIZE(exynos5440_iodesc);
348 }
349 #endif
350
351 iotable_init(iodesc, iodesc_sz);
352
353 if (mach_desc)
354 iotable_init(mach_desc, size);
355
356 /* detect cpu id and rev. */
357 s5p_init_cpu(S5P_VA_CHIPID);
358
359 s3c_init_cpu(samsung_cpu_id, cpu_ids, ARRAY_SIZE(cpu_ids));
360 }
361
362 static void __init exynos4_map_io(void)
363 {
364 iotable_init(exynos4_iodesc, ARRAY_SIZE(exynos4_iodesc));
365
366 if (soc_is_exynos4210() && samsung_rev() == EXYNOS4210_REV_0)
367 iotable_init(exynos4_iodesc0, ARRAY_SIZE(exynos4_iodesc0));
368 else
369 iotable_init(exynos4_iodesc1, ARRAY_SIZE(exynos4_iodesc1));
370
371 /* initialize device information early */
372 exynos4_default_sdhci0();
373 exynos4_default_sdhci1();
374 exynos4_default_sdhci2();
375 exynos4_default_sdhci3();
376
377 s3c_adc_setname("samsung-adc-v3");
378
379 s3c_fimc_setname(0, "exynos4-fimc");
380 s3c_fimc_setname(1, "exynos4-fimc");
381 s3c_fimc_setname(2, "exynos4-fimc");
382 s3c_fimc_setname(3, "exynos4-fimc");
383
384 s3c_sdhci_setname(0, "exynos4-sdhci");
385 s3c_sdhci_setname(1, "exynos4-sdhci");
386 s3c_sdhci_setname(2, "exynos4-sdhci");
387 s3c_sdhci_setname(3, "exynos4-sdhci");
388
389 /* The I2C bus controllers are directly compatible with s3c2440 */
390 s3c_i2c0_setname("s3c2440-i2c");
391 s3c_i2c1_setname("s3c2440-i2c");
392 s3c_i2c2_setname("s3c2440-i2c");
393
394 s5p_fb_setname(0, "exynos4-fb");
395 s5p_hdmi_setname("exynos4-hdmi");
396
397 s3c64xx_spi_setname("exynos4210-spi");
398 }
399
400 static void __init exynos5_map_io(void)
401 {
402 iotable_init(exynos5_iodesc, ARRAY_SIZE(exynos5_iodesc));
403 }
404
405 static void __init exynos4_init_clocks(int xtal)
406 {
407 printk(KERN_DEBUG "%s: initializing clocks\n", __func__);
408
409 s3c24xx_register_baseclocks(xtal);
410 s5p_register_clocks(xtal);
411
412 if (soc_is_exynos4210())
413 exynos4210_register_clocks();
414 else if (soc_is_exynos4212() || soc_is_exynos4412())
415 exynos4212_register_clocks();
416
417 exynos4_register_clocks();
418 exynos4_setup_clocks();
419 }
420
421 static void __init exynos5440_map_io(void)
422 {
423 iotable_init(exynos5440_iodesc0, ARRAY_SIZE(exynos5440_iodesc0));
424 }
425
426 static void __init exynos5_init_clocks(int xtal)
427 {
428 printk(KERN_DEBUG "%s: initializing clocks\n", __func__);
429
430 /* EXYNOS5440 can support only common clock framework */
431
432 if (soc_is_exynos5440())
433 return;
434
435 #ifdef CONFIG_SOC_EXYNOS5250
436 s3c24xx_register_baseclocks(xtal);
437 s5p_register_clocks(xtal);
438
439 exynos5_register_clocks();
440 exynos5_setup_clocks();
441 #endif
442 }
443
444 void __init exynos4_init_irq(void)
445 {
446 unsigned int gic_bank_offset;
447
448 gic_bank_offset = soc_is_exynos4412() ? 0x4000 : 0x8000;
449
450 if (!of_have_populated_dt())
451 gic_init_bases(0, IRQ_PPI(0), S5P_VA_GIC_DIST, S5P_VA_GIC_CPU, gic_bank_offset, NULL);
452 #ifdef CONFIG_OF
453 else
454 irqchip_init();
455 #endif
456
457 if (!of_have_populated_dt())
458 combiner_init(S5P_VA_COMBINER_BASE, NULL);
459
460 /*
461 * The parameters of s5p_init_irq() are for VIC init.
462 * Theses parameters should be NULL and 0 because EXYNOS4
463 * uses GIC instead of VIC.
464 */
465 s5p_init_irq(NULL, 0);
466 }
467
468 void __init exynos5_init_irq(void)
469 {
470 #ifdef CONFIG_OF
471 irqchip_init();
472 #endif
473 /*
474 * The parameters of s5p_init_irq() are for VIC init.
475 * Theses parameters should be NULL and 0 because EXYNOS4
476 * uses GIC instead of VIC.
477 */
478 if (!of_machine_is_compatible("samsung,exynos5440"))
479 s5p_init_irq(NULL, 0);
480
481 gic_arch_extn.irq_set_wake = s3c_irq_wake;
482 }
483
484 struct bus_type exynos_subsys = {
485 .name = "exynos-core",
486 .dev_name = "exynos-core",
487 };
488
489 static struct device exynos4_dev = {
490 .bus = &exynos_subsys,
491 };
492
493 static int __init exynos_core_init(void)
494 {
495 return subsys_system_register(&exynos_subsys, NULL);
496 }
497 core_initcall(exynos_core_init);
498
499 #ifdef CONFIG_CACHE_L2X0
500 static int __init exynos4_l2x0_cache_init(void)
501 {
502 int ret;
503
504 if (soc_is_exynos5250() || soc_is_exynos5440())
505 return 0;
506
507 ret = l2x0_of_init(L2_AUX_VAL, L2_AUX_MASK);
508 if (!ret) {
509 l2x0_regs_phys = virt_to_phys(&l2x0_saved_regs);
510 clean_dcache_area(&l2x0_regs_phys, sizeof(unsigned long));
511 return 0;
512 }
513
514 if (!(__raw_readl(S5P_VA_L2CC + L2X0_CTRL) & 0x1)) {
515 l2x0_saved_regs.phy_base = EXYNOS4_PA_L2CC;
516 /* TAG, Data Latency Control: 2 cycles */
517 l2x0_saved_regs.tag_latency = 0x110;
518
519 if (soc_is_exynos4212() || soc_is_exynos4412())
520 l2x0_saved_regs.data_latency = 0x120;
521 else
522 l2x0_saved_regs.data_latency = 0x110;
523
524 l2x0_saved_regs.prefetch_ctrl = 0x30000007;
525 l2x0_saved_regs.pwr_ctrl =
526 (L2X0_DYNAMIC_CLK_GATING_EN | L2X0_STNDBY_MODE_EN);
527
528 l2x0_regs_phys = virt_to_phys(&l2x0_saved_regs);
529
530 __raw_writel(l2x0_saved_regs.tag_latency,
531 S5P_VA_L2CC + L2X0_TAG_LATENCY_CTRL);
532 __raw_writel(l2x0_saved_regs.data_latency,
533 S5P_VA_L2CC + L2X0_DATA_LATENCY_CTRL);
534
535 /* L2X0 Prefetch Control */
536 __raw_writel(l2x0_saved_regs.prefetch_ctrl,
537 S5P_VA_L2CC + L2X0_PREFETCH_CTRL);
538
539 /* L2X0 Power Control */
540 __raw_writel(l2x0_saved_regs.pwr_ctrl,
541 S5P_VA_L2CC + L2X0_POWER_CTRL);
542
543 clean_dcache_area(&l2x0_regs_phys, sizeof(unsigned long));
544 clean_dcache_area(&l2x0_saved_regs, sizeof(struct l2x0_regs));
545 }
546
547 l2x0_init(S5P_VA_L2CC, L2_AUX_VAL, L2_AUX_MASK);
548 return 0;
549 }
550 early_initcall(exynos4_l2x0_cache_init);
551 #endif
552
553 static int __init exynos_init(void)
554 {
555 printk(KERN_INFO "EXYNOS: Initializing architecture\n");
556
557 return device_register(&exynos4_dev);
558 }
559
560 /* uart registration process */
561
562 static void __init exynos4_init_uarts(struct s3c2410_uartcfg *cfg, int no)
563 {
564 struct s3c2410_uartcfg *tcfg = cfg;
565 u32 ucnt;
566
567 for (ucnt = 0; ucnt < no; ucnt++, tcfg++)
568 tcfg->has_fracval = 1;
569
570 s3c24xx_init_uartdevs("exynos4210-uart", exynos4_uart_resources, cfg, no);
571 }
572
573 static void __iomem *exynos_eint_base;
574
575 static DEFINE_SPINLOCK(eint_lock);
576
577 static unsigned int eint0_15_data[16];
578
579 static inline int exynos4_irq_to_gpio(unsigned int irq)
580 {
581 if (irq < IRQ_EINT(0))
582 return -EINVAL;
583
584 irq -= IRQ_EINT(0);
585 if (irq < 8)
586 return EXYNOS4_GPX0(irq);
587
588 irq -= 8;
589 if (irq < 8)
590 return EXYNOS4_GPX1(irq);
591
592 irq -= 8;
593 if (irq < 8)
594 return EXYNOS4_GPX2(irq);
595
596 irq -= 8;
597 if (irq < 8)
598 return EXYNOS4_GPX3(irq);
599
600 return -EINVAL;
601 }
602
603 static inline int exynos5_irq_to_gpio(unsigned int irq)
604 {
605 if (irq < IRQ_EINT(0))
606 return -EINVAL;
607
608 irq -= IRQ_EINT(0);
609 if (irq < 8)
610 return EXYNOS5_GPX0(irq);
611
612 irq -= 8;
613 if (irq < 8)
614 return EXYNOS5_GPX1(irq);
615
616 irq -= 8;
617 if (irq < 8)
618 return EXYNOS5_GPX2(irq);
619
620 irq -= 8;
621 if (irq < 8)
622 return EXYNOS5_GPX3(irq);
623
624 return -EINVAL;
625 }
626
627 static unsigned int exynos4_eint0_15_src_int[16] = {
628 EXYNOS4_IRQ_EINT0,
629 EXYNOS4_IRQ_EINT1,
630 EXYNOS4_IRQ_EINT2,
631 EXYNOS4_IRQ_EINT3,
632 EXYNOS4_IRQ_EINT4,
633 EXYNOS4_IRQ_EINT5,
634 EXYNOS4_IRQ_EINT6,
635 EXYNOS4_IRQ_EINT7,
636 EXYNOS4_IRQ_EINT8,
637 EXYNOS4_IRQ_EINT9,
638 EXYNOS4_IRQ_EINT10,
639 EXYNOS4_IRQ_EINT11,
640 EXYNOS4_IRQ_EINT12,
641 EXYNOS4_IRQ_EINT13,
642 EXYNOS4_IRQ_EINT14,
643 EXYNOS4_IRQ_EINT15,
644 };
645
646 static unsigned int exynos5_eint0_15_src_int[16] = {
647 EXYNOS5_IRQ_EINT0,
648 EXYNOS5_IRQ_EINT1,
649 EXYNOS5_IRQ_EINT2,
650 EXYNOS5_IRQ_EINT3,
651 EXYNOS5_IRQ_EINT4,
652 EXYNOS5_IRQ_EINT5,
653 EXYNOS5_IRQ_EINT6,
654 EXYNOS5_IRQ_EINT7,
655 EXYNOS5_IRQ_EINT8,
656 EXYNOS5_IRQ_EINT9,
657 EXYNOS5_IRQ_EINT10,
658 EXYNOS5_IRQ_EINT11,
659 EXYNOS5_IRQ_EINT12,
660 EXYNOS5_IRQ_EINT13,
661 EXYNOS5_IRQ_EINT14,
662 EXYNOS5_IRQ_EINT15,
663 };
664 static inline void exynos_irq_eint_mask(struct irq_data *data)
665 {
666 u32 mask;
667
668 spin_lock(&eint_lock);
669 mask = __raw_readl(EINT_MASK(exynos_eint_base, data->irq));
670 mask |= EINT_OFFSET_BIT(data->irq);
671 __raw_writel(mask, EINT_MASK(exynos_eint_base, data->irq));
672 spin_unlock(&eint_lock);
673 }
674
675 static void exynos_irq_eint_unmask(struct irq_data *data)
676 {
677 u32 mask;
678
679 spin_lock(&eint_lock);
680 mask = __raw_readl(EINT_MASK(exynos_eint_base, data->irq));
681 mask &= ~(EINT_OFFSET_BIT(data->irq));
682 __raw_writel(mask, EINT_MASK(exynos_eint_base, data->irq));
683 spin_unlock(&eint_lock);
684 }
685
686 static inline void exynos_irq_eint_ack(struct irq_data *data)
687 {
688 __raw_writel(EINT_OFFSET_BIT(data->irq),
689 EINT_PEND(exynos_eint_base, data->irq));
690 }
691
692 static void exynos_irq_eint_maskack(struct irq_data *data)
693 {
694 exynos_irq_eint_mask(data);
695 exynos_irq_eint_ack(data);
696 }
697
698 static int exynos_irq_eint_set_type(struct irq_data *data, unsigned int type)
699 {
700 int offs = EINT_OFFSET(data->irq);
701 int shift;
702 u32 ctrl, mask;
703 u32 newvalue = 0;
704
705 switch (type) {
706 case IRQ_TYPE_EDGE_RISING:
707 newvalue = S5P_IRQ_TYPE_EDGE_RISING;
708 break;
709
710 case IRQ_TYPE_EDGE_FALLING:
711 newvalue = S5P_IRQ_TYPE_EDGE_FALLING;
712 break;
713
714 case IRQ_TYPE_EDGE_BOTH:
715 newvalue = S5P_IRQ_TYPE_EDGE_BOTH;
716 break;
717
718 case IRQ_TYPE_LEVEL_LOW:
719 newvalue = S5P_IRQ_TYPE_LEVEL_LOW;
720 break;
721
722 case IRQ_TYPE_LEVEL_HIGH:
723 newvalue = S5P_IRQ_TYPE_LEVEL_HIGH;
724 break;
725
726 default:
727 printk(KERN_ERR "No such irq type %d", type);
728 return -EINVAL;
729 }
730
731 shift = (offs & 0x7) * 4;
732 mask = 0x7 << shift;
733
734 spin_lock(&eint_lock);
735 ctrl = __raw_readl(EINT_CON(exynos_eint_base, data->irq));
736 ctrl &= ~mask;
737 ctrl |= newvalue << shift;
738 __raw_writel(ctrl, EINT_CON(exynos_eint_base, data->irq));
739 spin_unlock(&eint_lock);
740
741 if (soc_is_exynos5250())
742 s3c_gpio_cfgpin(exynos5_irq_to_gpio(data->irq), S3C_GPIO_SFN(0xf));
743 else
744 s3c_gpio_cfgpin(exynos4_irq_to_gpio(data->irq), S3C_GPIO_SFN(0xf));
745
746 return 0;
747 }
748
749 static struct irq_chip exynos_irq_eint = {
750 .name = "exynos-eint",
751 .irq_mask = exynos_irq_eint_mask,
752 .irq_unmask = exynos_irq_eint_unmask,
753 .irq_mask_ack = exynos_irq_eint_maskack,
754 .irq_ack = exynos_irq_eint_ack,
755 .irq_set_type = exynos_irq_eint_set_type,
756 #ifdef CONFIG_PM
757 .irq_set_wake = s3c_irqext_wake,
758 #endif
759 };
760
761 /*
762 * exynos4_irq_demux_eint
763 *
764 * This function demuxes the IRQ from from EINTs 16 to 31.
765 * It is designed to be inlined into the specific handler
766 * s5p_irq_demux_eintX_Y.
767 *
768 * Each EINT pend/mask registers handle eight of them.
769 */
770 static inline void exynos_irq_demux_eint(unsigned int start)
771 {
772 unsigned int irq;
773
774 u32 status = __raw_readl(EINT_PEND(exynos_eint_base, start));
775 u32 mask = __raw_readl(EINT_MASK(exynos_eint_base, start));
776
777 status &= ~mask;
778 status &= 0xff;
779
780 while (status) {
781 irq = fls(status) - 1;
782 generic_handle_irq(irq + start);
783 status &= ~(1 << irq);
784 }
785 }
786
787 static void exynos_irq_demux_eint16_31(unsigned int irq, struct irq_desc *desc)
788 {
789 struct irq_chip *chip = irq_get_chip(irq);
790 chained_irq_enter(chip, desc);
791 exynos_irq_demux_eint(IRQ_EINT(16));
792 exynos_irq_demux_eint(IRQ_EINT(24));
793 chained_irq_exit(chip, desc);
794 }
795
796 static void exynos_irq_eint0_15(unsigned int irq, struct irq_desc *desc)
797 {
798 u32 *irq_data = irq_get_handler_data(irq);
799 struct irq_chip *chip = irq_get_chip(irq);
800
801 chained_irq_enter(chip, desc);
802 generic_handle_irq(*irq_data);
803 chained_irq_exit(chip, desc);
804 }
805
806 static int __init exynos_init_irq_eint(void)
807 {
808 int irq;
809
810 #ifdef CONFIG_PINCTRL_SAMSUNG
811 /*
812 * The Samsung pinctrl driver provides an integrated gpio/pinmux/pinconf
813 * functionality along with support for external gpio and wakeup
814 * interrupts. If the samsung pinctrl driver is enabled and includes
815 * the wakeup interrupt support, then the setting up external wakeup
816 * interrupts here can be skipped. This check here is temporary to
817 * allow exynos4 platforms that do not use Samsung pinctrl driver to
818 * co-exist with platforms that do. When all of the Samsung Exynos4
819 * platforms switch over to using the pinctrl driver, the wakeup
820 * interrupt support code here can be completely removed.
821 */
822 static const struct of_device_id exynos_pinctrl_ids[] = {
823 { .compatible = "samsung,exynos4210-pinctrl", },
824 { .compatible = "samsung,exynos4x12-pinctrl", },
825 };
826 struct device_node *pctrl_np, *wkup_np;
827 const char *wkup_compat = "samsung,exynos4210-wakeup-eint";
828
829 for_each_matching_node(pctrl_np, exynos_pinctrl_ids) {
830 if (of_device_is_available(pctrl_np)) {
831 wkup_np = of_find_compatible_node(pctrl_np, NULL,
832 wkup_compat);
833 if (wkup_np)
834 return -ENODEV;
835 }
836 }
837 #endif
838 if (soc_is_exynos5440())
839 return 0;
840
841 if (soc_is_exynos5250())
842 exynos_eint_base = ioremap(EXYNOS5_PA_GPIO1, SZ_4K);
843 else
844 exynos_eint_base = ioremap(EXYNOS4_PA_GPIO2, SZ_4K);
845
846 if (exynos_eint_base == NULL) {
847 pr_err("unable to ioremap for EINT base address\n");
848 return -ENOMEM;
849 }
850
851 for (irq = 0 ; irq <= 31 ; irq++) {
852 irq_set_chip_and_handler(IRQ_EINT(irq), &exynos_irq_eint,
853 handle_level_irq);
854 set_irq_flags(IRQ_EINT(irq), IRQF_VALID);
855 }
856
857 irq_set_chained_handler(EXYNOS_IRQ_EINT16_31, exynos_irq_demux_eint16_31);
858
859 for (irq = 0 ; irq <= 15 ; irq++) {
860 eint0_15_data[irq] = IRQ_EINT(irq);
861
862 if (soc_is_exynos5250()) {
863 irq_set_handler_data(exynos5_eint0_15_src_int[irq],
864 &eint0_15_data[irq]);
865 irq_set_chained_handler(exynos5_eint0_15_src_int[irq],
866 exynos_irq_eint0_15);
867 } else {
868 irq_set_handler_data(exynos4_eint0_15_src_int[irq],
869 &eint0_15_data[irq]);
870 irq_set_chained_handler(exynos4_eint0_15_src_int[irq],
871 exynos_irq_eint0_15);
872 }
873 }
874
875 return 0;
876 }
877 arch_initcall(exynos_init_irq_eint);
kernel source for telekom puls (alcatel/mediatek)