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b024043b KK |
1 | /* |
2 | * Copyright (c) 2011 Samsung Electronics Co., Ltd. | |
3 | * http://www.samsung.com | |
80789e79 BD |
4 | * |
5 | * Copyright 2008 Openmoko, Inc. | |
6 | * Copyright 2008 Simtec Electronics | |
b024043b KK |
7 | * Ben Dooks <ben@simtec.co.uk> |
8 | * http://armlinux.simtec.co.uk/ | |
80789e79 | 9 | * |
b024043b | 10 | * Common Codes for S3C64XX machines |
80789e79 BD |
11 | * |
12 | * This program is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License version 2 as | |
14 | * published by the Free Software Foundation. | |
15 | */ | |
16 | ||
17 | #include <linux/kernel.h> | |
b024043b KK |
18 | #include <linux/init.h> |
19 | #include <linux/module.h> | |
80789e79 | 20 | #include <linux/interrupt.h> |
b024043b | 21 | #include <linux/ioport.h> |
b024043b KK |
22 | #include <linux/serial_core.h> |
23 | #include <linux/platform_device.h> | |
80789e79 | 24 | #include <linux/io.h> |
b024043b KK |
25 | #include <linux/dma-mapping.h> |
26 | #include <linux/irq.h> | |
27 | #include <linux/gpio.h> | |
80789e79 | 28 | |
b024043b KK |
29 | #include <asm/mach/arch.h> |
30 | #include <asm/mach/map.h> | |
80789e79 BD |
31 | #include <asm/hardware/vic.h> |
32 | ||
b024043b KK |
33 | #include <mach/map.h> |
34 | #include <mach/hardware.h> | |
3501c9ae | 35 | #include <mach/regs-gpio.h> |
80789e79 | 36 | |
80789e79 | 37 | #include <plat/cpu.h> |
b024043b KK |
38 | #include <plat/clock.h> |
39 | #include <plat/devs.h> | |
bd117bd1 | 40 | #include <plat/pm.h> |
b024043b KK |
41 | #include <plat/gpio-cfg.h> |
42 | #include <plat/irq-uart.h> | |
43 | #include <plat/irq-vic-timer.h> | |
44 | #include <plat/regs-irqtype.h> | |
45 | #include <plat/regs-serial.h> | |
ff84ded2 | 46 | #include <plat/watchdog-reset.h> |
b024043b KK |
47 | |
48 | #include "common.h" | |
49 | ||
50 | /* uart registration process */ | |
51 | ||
52 | void __init s3c64xx_init_uarts(struct s3c2410_uartcfg *cfg, int no) | |
53 | { | |
54 | s3c24xx_init_uartdevs("s3c6400-uart", s3c64xx_uart_resources, cfg, no); | |
55 | } | |
56 | ||
57 | /* table of supported CPUs */ | |
58 | ||
59 | static const char name_s3c6400[] = "S3C6400"; | |
60 | static const char name_s3c6410[] = "S3C6410"; | |
61 | ||
62 | static struct cpu_table cpu_ids[] __initdata = { | |
63 | { | |
64 | .idcode = S3C6400_CPU_ID, | |
65 | .idmask = S3C64XX_CPU_MASK, | |
66 | .map_io = s3c6400_map_io, | |
67 | .init_clocks = s3c6400_init_clocks, | |
68 | .init_uarts = s3c64xx_init_uarts, | |
69 | .init = s3c6400_init, | |
70 | .name = name_s3c6400, | |
71 | }, { | |
72 | .idcode = S3C6410_CPU_ID, | |
73 | .idmask = S3C64XX_CPU_MASK, | |
74 | .map_io = s3c6410_map_io, | |
75 | .init_clocks = s3c6410_init_clocks, | |
76 | .init_uarts = s3c64xx_init_uarts, | |
77 | .init = s3c6410_init, | |
78 | .name = name_s3c6410, | |
79 | }, | |
80 | }; | |
81 | ||
82 | /* minimal IO mapping */ | |
83 | ||
84 | /* see notes on uart map in arch/arm/mach-s3c64xx/include/mach/debug-macro.S */ | |
85 | #define UART_OFFS (S3C_PA_UART & 0xfffff) | |
86 | ||
87 | static struct map_desc s3c_iodesc[] __initdata = { | |
88 | { | |
89 | .virtual = (unsigned long)S3C_VA_SYS, | |
90 | .pfn = __phys_to_pfn(S3C64XX_PA_SYSCON), | |
91 | .length = SZ_4K, | |
92 | .type = MT_DEVICE, | |
93 | }, { | |
94 | .virtual = (unsigned long)S3C_VA_MEM, | |
95 | .pfn = __phys_to_pfn(S3C64XX_PA_SROM), | |
96 | .length = SZ_4K, | |
97 | .type = MT_DEVICE, | |
98 | }, { | |
99 | .virtual = (unsigned long)(S3C_VA_UART + UART_OFFS), | |
100 | .pfn = __phys_to_pfn(S3C_PA_UART), | |
101 | .length = SZ_4K, | |
102 | .type = MT_DEVICE, | |
103 | }, { | |
104 | .virtual = (unsigned long)VA_VIC0, | |
105 | .pfn = __phys_to_pfn(S3C64XX_PA_VIC0), | |
106 | .length = SZ_16K, | |
107 | .type = MT_DEVICE, | |
108 | }, { | |
109 | .virtual = (unsigned long)VA_VIC1, | |
110 | .pfn = __phys_to_pfn(S3C64XX_PA_VIC1), | |
111 | .length = SZ_16K, | |
112 | .type = MT_DEVICE, | |
113 | }, { | |
114 | .virtual = (unsigned long)S3C_VA_TIMER, | |
115 | .pfn = __phys_to_pfn(S3C_PA_TIMER), | |
116 | .length = SZ_16K, | |
117 | .type = MT_DEVICE, | |
118 | }, { | |
119 | .virtual = (unsigned long)S3C64XX_VA_GPIO, | |
120 | .pfn = __phys_to_pfn(S3C64XX_PA_GPIO), | |
121 | .length = SZ_4K, | |
122 | .type = MT_DEVICE, | |
123 | }, { | |
124 | .virtual = (unsigned long)S3C64XX_VA_MODEM, | |
125 | .pfn = __phys_to_pfn(S3C64XX_PA_MODEM), | |
126 | .length = SZ_4K, | |
127 | .type = MT_DEVICE, | |
128 | }, { | |
129 | .virtual = (unsigned long)S3C_VA_WATCHDOG, | |
130 | .pfn = __phys_to_pfn(S3C64XX_PA_WATCHDOG), | |
131 | .length = SZ_4K, | |
132 | .type = MT_DEVICE, | |
133 | }, { | |
134 | .virtual = (unsigned long)S3C_VA_USB_HSPHY, | |
135 | .pfn = __phys_to_pfn(S3C64XX_PA_USB_HSPHY), | |
136 | .length = SZ_1K, | |
137 | .type = MT_DEVICE, | |
138 | }, | |
139 | }; | |
140 | ||
7affca35 LT |
141 | static struct bus_type s3c64xx_subsys = { |
142 | .name = "s3c64xx-core", | |
143 | .dev_name = "s3c64xx-core", | |
b024043b KK |
144 | }; |
145 | ||
7affca35 LT |
146 | static struct device s3c64xx_dev = { |
147 | .bus = &s3c64xx_subsys, | |
b024043b KK |
148 | }; |
149 | ||
150 | /* read cpu identification code */ | |
151 | ||
152 | void __init s3c64xx_init_io(struct map_desc *mach_desc, int size) | |
153 | { | |
154 | /* initialise the io descriptors we need for initialisation */ | |
155 | iotable_init(s3c_iodesc, ARRAY_SIZE(s3c_iodesc)); | |
156 | iotable_init(mach_desc, size); | |
157 | init_consistent_dma_size(SZ_8M); | |
158 | ||
159 | /* detect cpu id */ | |
160 | s3c64xx_init_cpu(); | |
161 | ||
162 | s3c_init_cpu(samsung_cpu_id, cpu_ids, ARRAY_SIZE(cpu_ids)); | |
163 | } | |
164 | ||
7affca35 | 165 | static __init int s3c64xx_dev_init(void) |
b024043b | 166 | { |
7affca35 LT |
167 | subsys_system_register(&s3c64xx_subsys, NULL); |
168 | return device_register(&s3c64xx_dev); | |
b024043b | 169 | } |
7affca35 | 170 | core_initcall(s3c64xx_dev_init); |
b024043b KK |
171 | |
172 | /* | |
173 | * setup the sources the vic should advertise resume | |
174 | * for, even though it is not doing the wake | |
175 | * (set_irq_wake needs to be valid) | |
176 | */ | |
177 | #define IRQ_VIC0_RESUME (1 << (IRQ_RTC_TIC - IRQ_VIC0_BASE)) | |
178 | #define IRQ_VIC1_RESUME (1 << (IRQ_RTC_ALARM - IRQ_VIC1_BASE) | \ | |
179 | 1 << (IRQ_PENDN - IRQ_VIC1_BASE) | \ | |
180 | 1 << (IRQ_HSMMC0 - IRQ_VIC1_BASE) | \ | |
181 | 1 << (IRQ_HSMMC1 - IRQ_VIC1_BASE) | \ | |
182 | 1 << (IRQ_HSMMC2 - IRQ_VIC1_BASE)) | |
183 | ||
184 | void __init s3c64xx_init_irq(u32 vic0_valid, u32 vic1_valid) | |
185 | { | |
186 | printk(KERN_DEBUG "%s: initialising interrupts\n", __func__); | |
187 | ||
188 | /* initialise the pair of VICs */ | |
189 | vic_init(VA_VIC0, IRQ_VIC0_BASE, vic0_valid, IRQ_VIC0_RESUME); | |
190 | vic_init(VA_VIC1, IRQ_VIC1_BASE, vic1_valid, IRQ_VIC1_RESUME); | |
191 | ||
192 | /* add the timer sub-irqs */ | |
193 | s3c_init_vic_timer_irq(5, IRQ_TIMER0); | |
194 | } | |
80789e79 | 195 | |
80789e79 | 196 | #define eint_offset(irq) ((irq) - IRQ_EINT(0)) |
3c916975 | 197 | #define eint_irq_to_bit(irq) ((u32)(1 << eint_offset(irq))) |
80789e79 | 198 | |
c35cd6ec | 199 | static inline void s3c_irq_eint_mask(struct irq_data *data) |
80789e79 BD |
200 | { |
201 | u32 mask; | |
202 | ||
203 | mask = __raw_readl(S3C64XX_EINT0MASK); | |
3c916975 | 204 | mask |= (u32)data->chip_data; |
80789e79 BD |
205 | __raw_writel(mask, S3C64XX_EINT0MASK); |
206 | } | |
207 | ||
c35cd6ec | 208 | static void s3c_irq_eint_unmask(struct irq_data *data) |
80789e79 BD |
209 | { |
210 | u32 mask; | |
211 | ||
212 | mask = __raw_readl(S3C64XX_EINT0MASK); | |
3c916975 | 213 | mask &= ~((u32)data->chip_data); |
80789e79 BD |
214 | __raw_writel(mask, S3C64XX_EINT0MASK); |
215 | } | |
216 | ||
c35cd6ec | 217 | static inline void s3c_irq_eint_ack(struct irq_data *data) |
80789e79 | 218 | { |
3c916975 | 219 | __raw_writel((u32)data->chip_data, S3C64XX_EINT0PEND); |
80789e79 BD |
220 | } |
221 | ||
c35cd6ec | 222 | static void s3c_irq_eint_maskack(struct irq_data *data) |
80789e79 BD |
223 | { |
224 | /* compiler should in-line these */ | |
c35cd6ec MB |
225 | s3c_irq_eint_mask(data); |
226 | s3c_irq_eint_ack(data); | |
80789e79 BD |
227 | } |
228 | ||
c35cd6ec | 229 | static int s3c_irq_eint_set_type(struct irq_data *data, unsigned int type) |
80789e79 | 230 | { |
c35cd6ec | 231 | int offs = eint_offset(data->irq); |
6a88e983 | 232 | int pin, pin_val; |
80789e79 BD |
233 | int shift; |
234 | u32 ctrl, mask; | |
235 | u32 newvalue = 0; | |
236 | void __iomem *reg; | |
237 | ||
238 | if (offs > 27) | |
239 | return -EINVAL; | |
240 | ||
a9c5d23a | 241 | if (offs <= 15) |
80789e79 BD |
242 | reg = S3C64XX_EINT0CON0; |
243 | else | |
244 | reg = S3C64XX_EINT0CON1; | |
245 | ||
246 | switch (type) { | |
247 | case IRQ_TYPE_NONE: | |
248 | printk(KERN_WARNING "No edge setting!\n"); | |
249 | break; | |
250 | ||
251 | case IRQ_TYPE_EDGE_RISING: | |
252 | newvalue = S3C2410_EXTINT_RISEEDGE; | |
253 | break; | |
254 | ||
255 | case IRQ_TYPE_EDGE_FALLING: | |
256 | newvalue = S3C2410_EXTINT_FALLEDGE; | |
257 | break; | |
258 | ||
259 | case IRQ_TYPE_EDGE_BOTH: | |
260 | newvalue = S3C2410_EXTINT_BOTHEDGE; | |
261 | break; | |
262 | ||
263 | case IRQ_TYPE_LEVEL_LOW: | |
264 | newvalue = S3C2410_EXTINT_LOWLEV; | |
265 | break; | |
266 | ||
267 | case IRQ_TYPE_LEVEL_HIGH: | |
268 | newvalue = S3C2410_EXTINT_HILEV; | |
269 | break; | |
270 | ||
271 | default: | |
272 | printk(KERN_ERR "No such irq type %d", type); | |
273 | return -1; | |
274 | } | |
275 | ||
6a88e983 MC |
276 | if (offs <= 15) |
277 | shift = (offs / 2) * 4; | |
278 | else | |
279 | shift = ((offs - 16) / 2) * 4; | |
80789e79 BD |
280 | mask = 0x7 << shift; |
281 | ||
282 | ctrl = __raw_readl(reg); | |
283 | ctrl &= ~mask; | |
284 | ctrl |= newvalue << shift; | |
285 | __raw_writel(ctrl, reg); | |
286 | ||
28fd2d39 BD |
287 | /* set the GPIO pin appropriately */ |
288 | ||
6a88e983 | 289 | if (offs < 16) { |
28fd2d39 | 290 | pin = S3C64XX_GPN(offs); |
6a88e983 MC |
291 | pin_val = S3C_GPIO_SFN(2); |
292 | } else if (offs < 23) { | |
293 | pin = S3C64XX_GPL(offs + 8 - 16); | |
294 | pin_val = S3C_GPIO_SFN(3); | |
295 | } else { | |
28fd2d39 | 296 | pin = S3C64XX_GPM(offs - 23); |
6a88e983 MC |
297 | pin_val = S3C_GPIO_SFN(3); |
298 | } | |
28fd2d39 | 299 | |
6a88e983 | 300 | s3c_gpio_cfgpin(pin, pin_val); |
28fd2d39 | 301 | |
80789e79 BD |
302 | return 0; |
303 | } | |
304 | ||
305 | static struct irq_chip s3c_irq_eint = { | |
306 | .name = "s3c-eint", | |
c35cd6ec MB |
307 | .irq_mask = s3c_irq_eint_mask, |
308 | .irq_unmask = s3c_irq_eint_unmask, | |
309 | .irq_mask_ack = s3c_irq_eint_maskack, | |
310 | .irq_ack = s3c_irq_eint_ack, | |
311 | .irq_set_type = s3c_irq_eint_set_type, | |
f5aeffb7 | 312 | .irq_set_wake = s3c_irqext_wake, |
80789e79 BD |
313 | }; |
314 | ||
315 | /* s3c_irq_demux_eint | |
316 | * | |
317 | * This function demuxes the IRQ from the group0 external interrupts, | |
318 | * from IRQ_EINT(0) to IRQ_EINT(27). It is designed to be inlined into | |
319 | * the specific handlers s3c_irq_demux_eintX_Y. | |
320 | */ | |
321 | static inline void s3c_irq_demux_eint(unsigned int start, unsigned int end) | |
322 | { | |
323 | u32 status = __raw_readl(S3C64XX_EINT0PEND); | |
324 | u32 mask = __raw_readl(S3C64XX_EINT0MASK); | |
325 | unsigned int irq; | |
326 | ||
327 | status &= ~mask; | |
328 | status >>= start; | |
329 | status &= (1 << (end - start + 1)) - 1; | |
330 | ||
331 | for (irq = IRQ_EINT(start); irq <= IRQ_EINT(end); irq++) { | |
332 | if (status & 1) | |
333 | generic_handle_irq(irq); | |
334 | ||
335 | status >>= 1; | |
336 | } | |
337 | } | |
338 | ||
339 | static void s3c_irq_demux_eint0_3(unsigned int irq, struct irq_desc *desc) | |
340 | { | |
341 | s3c_irq_demux_eint(0, 3); | |
342 | } | |
343 | ||
344 | static void s3c_irq_demux_eint4_11(unsigned int irq, struct irq_desc *desc) | |
345 | { | |
346 | s3c_irq_demux_eint(4, 11); | |
347 | } | |
348 | ||
349 | static void s3c_irq_demux_eint12_19(unsigned int irq, struct irq_desc *desc) | |
350 | { | |
351 | s3c_irq_demux_eint(12, 19); | |
352 | } | |
353 | ||
354 | static void s3c_irq_demux_eint20_27(unsigned int irq, struct irq_desc *desc) | |
355 | { | |
356 | s3c_irq_demux_eint(20, 27); | |
357 | } | |
358 | ||
8bd8dbdf | 359 | static int __init s3c64xx_init_irq_eint(void) |
80789e79 BD |
360 | { |
361 | int irq; | |
362 | ||
363 | for (irq = IRQ_EINT(0); irq <= IRQ_EINT(27); irq++) { | |
f38c02f3 | 364 | irq_set_chip_and_handler(irq, &s3c_irq_eint, handle_level_irq); |
9323f261 | 365 | irq_set_chip_data(irq, (void *)eint_irq_to_bit(irq)); |
80789e79 BD |
366 | set_irq_flags(irq, IRQF_VALID); |
367 | } | |
368 | ||
6845664a TG |
369 | irq_set_chained_handler(IRQ_EINT0_3, s3c_irq_demux_eint0_3); |
370 | irq_set_chained_handler(IRQ_EINT4_11, s3c_irq_demux_eint4_11); | |
371 | irq_set_chained_handler(IRQ_EINT12_19, s3c_irq_demux_eint12_19); | |
372 | irq_set_chained_handler(IRQ_EINT20_27, s3c_irq_demux_eint20_27); | |
80789e79 BD |
373 | |
374 | return 0; | |
375 | } | |
80789e79 | 376 | arch_initcall(s3c64xx_init_irq_eint); |
ff84ded2 KK |
377 | |
378 | void s3c64xx_restart(char mode, const char *cmd) | |
379 | { | |
380 | if (mode != 's') | |
381 | arch_wdt_reset(); | |
382 | ||
383 | /* if all else fails, or mode was for soft, jump to 0 */ | |
384 | soft_restart(0); | |
385 | } |