1 /*
2 * linux/arch/arm/mach-clps7500/core.c
3 *
4 * Copyright (C) 1998 Russell King
5 * Copyright (C) 1999 Nexus Electronics Ltd
6 *
7 * Extra MM routines for CL7500 architecture
8 */
9 #include <linux/kernel.h>
10 #include <linux/types.h>
11 #include <linux/interrupt.h>
12 #include <linux/irq.h>
13 #include <linux/list.h>
14 #include <linux/sched.h>
15 #include <linux/init.h>
16 #include <linux/device.h>
17 #include <linux/serial_8250.h>
18
19 #include <asm/mach/arch.h>
20 #include <asm/mach/map.h>
21 #include <asm/mach/irq.h>
22 #include <asm/mach/time.h>
23
24 #include <asm/hardware.h>
25 #include <asm/hardware/iomd.h>
26 #include <asm/io.h>
27 #include <asm/irq.h>
28 #include <asm/mach-types.h>
29
30 unsigned int vram_size;
31
32 static void cl7500_ack_irq_a(unsigned int irq)
33 {
34 unsigned int val, mask;
35
36 mask = 1 << irq;
37 val = iomd_readb(IOMD_IRQMASKA);
38 iomd_writeb(val & ~mask, IOMD_IRQMASKA);
39 iomd_writeb(mask, IOMD_IRQCLRA);
40 }
41
42 static void cl7500_mask_irq_a(unsigned int irq)
43 {
44 unsigned int val, mask;
45
46 mask = 1 << irq;
47 val = iomd_readb(IOMD_IRQMASKA);
48 iomd_writeb(val & ~mask, IOMD_IRQMASKA);
49 }
50
51 static void cl7500_unmask_irq_a(unsigned int irq)
52 {
53 unsigned int val, mask;
54
55 mask = 1 << irq;
56 val = iomd_readb(IOMD_IRQMASKA);
57 iomd_writeb(val | mask, IOMD_IRQMASKA);
58 }
59
60 static struct irq_chip clps7500_a_chip = {
61 .ack = cl7500_ack_irq_a,
62 .mask = cl7500_mask_irq_a,
63 .unmask = cl7500_unmask_irq_a,
64 };
65
66 static void cl7500_mask_irq_b(unsigned int irq)
67 {
68 unsigned int val, mask;
69
70 mask = 1 << (irq & 7);
71 val = iomd_readb(IOMD_IRQMASKB);
72 iomd_writeb(val & ~mask, IOMD_IRQMASKB);
73 }
74
75 static void cl7500_unmask_irq_b(unsigned int irq)
76 {
77 unsigned int val, mask;
78
79 mask = 1 << (irq & 7);
80 val = iomd_readb(IOMD_IRQMASKB);
81 iomd_writeb(val | mask, IOMD_IRQMASKB);
82 }
83
84 static struct irq_chip clps7500_b_chip = {
85 .ack = cl7500_mask_irq_b,
86 .mask = cl7500_mask_irq_b,
87 .unmask = cl7500_unmask_irq_b,
88 };
89
90 static void cl7500_mask_irq_c(unsigned int irq)
91 {
92 unsigned int val, mask;
93
94 mask = 1 << (irq & 7);
95 val = iomd_readb(IOMD_IRQMASKC);
96 iomd_writeb(val & ~mask, IOMD_IRQMASKC);
97 }
98
99 static void cl7500_unmask_irq_c(unsigned int irq)
100 {
101 unsigned int val, mask;
102
103 mask = 1 << (irq & 7);
104 val = iomd_readb(IOMD_IRQMASKC);
105 iomd_writeb(val | mask, IOMD_IRQMASKC);
106 }
107
108 static struct irq_chip clps7500_c_chip = {
109 .ack = cl7500_mask_irq_c,
110 .mask = cl7500_mask_irq_c,
111 .unmask = cl7500_unmask_irq_c,
112 };
113
114 static void cl7500_mask_irq_d(unsigned int irq)
115 {
116 unsigned int val, mask;
117
118 mask = 1 << (irq & 7);
119 val = iomd_readb(IOMD_IRQMASKD);
120 iomd_writeb(val & ~mask, IOMD_IRQMASKD);
121 }
122
123 static void cl7500_unmask_irq_d(unsigned int irq)
124 {
125 unsigned int val, mask;
126
127 mask = 1 << (irq & 7);
128 val = iomd_readb(IOMD_IRQMASKD);
129 iomd_writeb(val | mask, IOMD_IRQMASKD);
130 }
131
132 static struct irq_chip clps7500_d_chip = {
133 .ack = cl7500_mask_irq_d,
134 .mask = cl7500_mask_irq_d,
135 .unmask = cl7500_unmask_irq_d,
136 };
137
138 static void cl7500_mask_irq_dma(unsigned int irq)
139 {
140 unsigned int val, mask;
141
142 mask = 1 << (irq & 7);
143 val = iomd_readb(IOMD_DMAMASK);
144 iomd_writeb(val & ~mask, IOMD_DMAMASK);
145 }
146
147 static void cl7500_unmask_irq_dma(unsigned int irq)
148 {
149 unsigned int val, mask;
150
151 mask = 1 << (irq & 7);
152 val = iomd_readb(IOMD_DMAMASK);
153 iomd_writeb(val | mask, IOMD_DMAMASK);
154 }
155
156 static struct irq_chip clps7500_dma_chip = {
157 .ack = cl7500_mask_irq_dma,
158 .mask = cl7500_mask_irq_dma,
159 .unmask = cl7500_unmask_irq_dma,
160 };
161
162 static void cl7500_mask_irq_fiq(unsigned int irq)
163 {
164 unsigned int val, mask;
165
166 mask = 1 << (irq & 7);
167 val = iomd_readb(IOMD_FIQMASK);
168 iomd_writeb(val & ~mask, IOMD_FIQMASK);
169 }
170
171 static void cl7500_unmask_irq_fiq(unsigned int irq)
172 {
173 unsigned int val, mask;
174
175 mask = 1 << (irq & 7);
176 val = iomd_readb(IOMD_FIQMASK);
177 iomd_writeb(val | mask, IOMD_FIQMASK);
178 }
179
180 static struct irq_chip clps7500_fiq_chip = {
181 .ack = cl7500_mask_irq_fiq,
182 .mask = cl7500_mask_irq_fiq,
183 .unmask = cl7500_unmask_irq_fiq,
184 };
185
186 static void cl7500_no_action(unsigned int irq)
187 {
188 }
189
190 static struct irq_chip clps7500_no_chip = {
191 .ack = cl7500_no_action,
192 .mask = cl7500_no_action,
193 .unmask = cl7500_no_action,
194 };
195
196 static struct irqaction irq_isa = {
197 .handler = no_action,
198 .mask = CPU_MASK_NONE,
199 .name = "isa",
200 };
201
202 static void __init clps7500_init_irq(void)
203 {
204 unsigned int irq, flags;
205
206 iomd_writeb(0, IOMD_IRQMASKA);
207 iomd_writeb(0, IOMD_IRQMASKB);
208 iomd_writeb(0, IOMD_FIQMASK);
209 iomd_writeb(0, IOMD_DMAMASK);
210
211 for (irq = 0; irq < NR_IRQS; irq++) {
212 flags = IRQF_VALID;
213
214 if (irq <= 6 || (irq >= 9 && irq <= 15) ||
215 (irq >= 48 && irq <= 55))
216 flags |= IRQF_PROBE;
217
218 switch (irq) {
219 case 0 ... 7:
220 set_irq_chip(irq, &clps7500_a_chip);
221 set_irq_handler(irq, handle_level_irq);
222 set_irq_flags(irq, flags);
223 break;
224
225 case 8 ... 15:
226 set_irq_chip(irq, &clps7500_b_chip);
227 set_irq_handler(irq, handle_level_irq);
228 set_irq_flags(irq, flags);
229 break;
230
231 case 16 ... 22:
232 set_irq_chip(irq, &clps7500_dma_chip);
233 set_irq_handler(irq, handle_level_irq);
234 set_irq_flags(irq, flags);
235 break;
236
237 case 24 ... 31:
238 set_irq_chip(irq, &clps7500_c_chip);
239 set_irq_handler(irq, handle_level_irq);
240 set_irq_flags(irq, flags);
241 break;
242
243 case 40 ... 47:
244 set_irq_chip(irq, &clps7500_d_chip);
245 set_irq_handler(irq, handle_level_irq);
246 set_irq_flags(irq, flags);
247 break;
248
249 case 48 ... 55:
250 set_irq_chip(irq, &clps7500_no_chip);
251 set_irq_handler(irq, handle_level_irq);
252 set_irq_flags(irq, flags);
253 break;
254
255 case 64 ... 72:
256 set_irq_chip(irq, &clps7500_fiq_chip);
257 set_irq_handler(irq, handle_level_irq);
258 set_irq_flags(irq, flags);
259 break;
260 }
261 }
262
263 setup_irq(IRQ_ISA, &irq_isa);
264 }
265
266 static struct map_desc cl7500_io_desc[] __initdata = {
267 { /* IO space */
268 .virtual = (unsigned long)IO_BASE,
269 .pfn = __phys_to_pfn(IO_START),
270 .length = IO_SIZE,
271 .type = MT_DEVICE
272 }, { /* ISA space */
273 .virtual = ISA_BASE,
274 .pfn = __phys_to_pfn(ISA_START),
275 .length = ISA_SIZE,
276 .type = MT_DEVICE
277 }, { /* Flash */
278 .virtual = FLASH_BASE,
279 .pfn = __phys_to_pfn(FLASH_START),
280 .length = FLASH_SIZE,
281 .type = MT_DEVICE
282 }, { /* LED */
283 .virtual = LED_BASE,
284 .pfn = __phys_to_pfn(LED_START),
285 .length = LED_SIZE,
286 .type = MT_DEVICE
287 }
288 };
289
290 static void __init clps7500_map_io(void)
291 {
292 iotable_init(cl7500_io_desc, ARRAY_SIZE(cl7500_io_desc));
293 }
294
295 extern void ioctime_init(void);
296 extern unsigned long ioc_timer_gettimeoffset(void);
297
298 static irqreturn_t
299 clps7500_timer_interrupt(int irq, void *dev_id)
300 {
301 timer_tick();
302
303 /* Why not using do_leds interface?? */
304 {
305 /* Twinkle the lights. */
306 static int count, state = 0xff00;
307 if (count-- == 0) {
308 state ^= 0x100;
309 count = 25;
310 *((volatile unsigned int *)LED_ADDRESS) = state;
311 }
312 }
313
314 return IRQ_HANDLED;
315 }
316
317 static struct irqaction clps7500_timer_irq = {
318 .name = "CLPS7500 Timer Tick",
319 .flags = IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL,
320 .handler = clps7500_timer_interrupt,
321 };
322
323 /*
324 * Set up timer interrupt.
325 */
326 static void __init clps7500_timer_init(void)
327 {
328 ioctime_init();
329 setup_irq(IRQ_TIMER, &clps7500_timer_irq);
330 }
331
332 static struct sys_timer clps7500_timer = {
333 .init = clps7500_timer_init,
334 .offset = ioc_timer_gettimeoffset,
335 };
336
337 static struct plat_serial8250_port serial_platform_data[] = {
338 {
339 .mapbase = 0x03010fe0,
340 .irq = 10,
341 .uartclk = 1843200,
342 .regshift = 2,
343 .iotype = UPIO_MEM,
344 .flags = UPF_BOOT_AUTOCONF | UPF_IOREMAP | UPF_SKIP_TEST,
345 },
346 {
347 .mapbase = 0x03010be0,
348 .irq = 0,
349 .uartclk = 1843200,
350 .regshift = 2,
351 .iotype = UPIO_MEM,
352 .flags = UPF_BOOT_AUTOCONF | UPF_IOREMAP | UPF_SKIP_TEST,
353 },
354 {
355 .iobase = ISASLOT_IO + 0x2e8,
356 .irq = 41,
357 .uartclk = 1843200,
358 .regshift = 0,
359 .iotype = UPIO_PORT,
360 .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
361 },
362 {
363 .iobase = ISASLOT_IO + 0x3e8,
364 .irq = 40,
365 .uartclk = 1843200,
366 .regshift = 0,
367 .iotype = UPIO_PORT,
368 .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
369 },
370 { },
371 };
372
373 static struct platform_device serial_device = {
374 .name = "serial8250",
375 .id = PLAT8250_DEV_PLATFORM,
376 .dev = {
377 .platform_data = serial_platform_data,
378 },
379 };
380
381 static void __init clps7500_init(void)
382 {
383 platform_device_register(&serial_device);
384 }
385
386 MACHINE_START(CLPS7500, "CL-PS7500")
387 /* Maintainer: Philip Blundell */
388 .phys_io = 0x03000000,
389 .io_pg_offst = ((0xe0000000) >> 18) & 0xfffc,
390 .map_io = clps7500_map_io,
391 .init_irq = clps7500_init_irq,
392 .init_machine = clps7500_init,
393 .timer = &clps7500_timer,
394 MACHINE_END
395
396
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