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sysfs: Remove support for tagged directories with untagged members (again)
[linux-btrfs-devel.git] / arch / arm / mach-realview / realview_eb.c
blob7a4e3b18cb3e72efc3c7f0834814d636c56e9d67
1 /*
2 * linux/arch/arm/mach-realview/realview_eb.c
3 *
4 * Copyright (C) 2004 ARM Limited
5 * Copyright (C) 2000 Deep Blue Solutions Ltd
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 as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 */
21
22 #include <linux/init.h>
23 #include <linux/platform_device.h>
24 #include <linux/sysdev.h>
25 #include <linux/amba/bus.h>
26 #include <linux/amba/pl061.h>
27 #include <linux/amba/mmci.h>
28 #include <linux/amba/pl022.h>
29 #include <linux/io.h>
30
31 #include <mach/hardware.h>
32 #include <asm/irq.h>
33 #include <asm/leds.h>
34 #include <asm/mach-types.h>
35 #include <asm/pmu.h>
36 #include <asm/pgtable.h>
37 #include <asm/hardware/gic.h>
38 #include <asm/hardware/cache-l2x0.h>
39 #include <asm/localtimer.h>
40
41 #include <asm/mach/arch.h>
42 #include <asm/mach/map.h>
43 #include <asm/mach/time.h>
44
45 #include <mach/board-eb.h>
46 #include <mach/irqs.h>
47
48 #include "core.h"
49
50 static struct map_desc realview_eb_io_desc[] __initdata = {
51 {
52 .virtual = IO_ADDRESS(REALVIEW_SYS_BASE),
53 .pfn = __phys_to_pfn(REALVIEW_SYS_BASE),
54 .length = SZ_4K,
55 .type = MT_DEVICE,
56 }, {
57 .virtual = IO_ADDRESS(REALVIEW_EB_GIC_CPU_BASE),
58 .pfn = __phys_to_pfn(REALVIEW_EB_GIC_CPU_BASE),
59 .length = SZ_4K,
60 .type = MT_DEVICE,
61 }, {
62 .virtual = IO_ADDRESS(REALVIEW_EB_GIC_DIST_BASE),
63 .pfn = __phys_to_pfn(REALVIEW_EB_GIC_DIST_BASE),
64 .length = SZ_4K,
65 .type = MT_DEVICE,
66 }, {
67 .virtual = IO_ADDRESS(REALVIEW_SCTL_BASE),
68 .pfn = __phys_to_pfn(REALVIEW_SCTL_BASE),
69 .length = SZ_4K,
70 .type = MT_DEVICE,
71 }, {
72 .virtual = IO_ADDRESS(REALVIEW_EB_TIMER0_1_BASE),
73 .pfn = __phys_to_pfn(REALVIEW_EB_TIMER0_1_BASE),
74 .length = SZ_4K,
75 .type = MT_DEVICE,
76 }, {
77 .virtual = IO_ADDRESS(REALVIEW_EB_TIMER2_3_BASE),
78 .pfn = __phys_to_pfn(REALVIEW_EB_TIMER2_3_BASE),
79 .length = SZ_4K,
80 .type = MT_DEVICE,
81 },
82 #ifdef CONFIG_DEBUG_LL
83 {
84 .virtual = IO_ADDRESS(REALVIEW_EB_UART0_BASE),
85 .pfn = __phys_to_pfn(REALVIEW_EB_UART0_BASE),
86 .length = SZ_4K,
87 .type = MT_DEVICE,
88 }
89 #endif
90 };
91
92 static struct map_desc realview_eb11mp_io_desc[] __initdata = {
93 {
94 .virtual = IO_ADDRESS(REALVIEW_EB11MP_GIC_CPU_BASE),
95 .pfn = __phys_to_pfn(REALVIEW_EB11MP_GIC_CPU_BASE),
96 .length = SZ_4K,
97 .type = MT_DEVICE,
98 }, {
99 .virtual = IO_ADDRESS(REALVIEW_EB11MP_GIC_DIST_BASE),
100 .pfn = __phys_to_pfn(REALVIEW_EB11MP_GIC_DIST_BASE),
101 .length = SZ_4K,
102 .type = MT_DEVICE,
103 }, {
104 .virtual = IO_ADDRESS(REALVIEW_EB11MP_L220_BASE),
105 .pfn = __phys_to_pfn(REALVIEW_EB11MP_L220_BASE),
106 .length = SZ_8K,
107 .type = MT_DEVICE,
108 }
109 };
110
111 static void __init realview_eb_map_io(void)
112 {
113 iotable_init(realview_eb_io_desc, ARRAY_SIZE(realview_eb_io_desc));
114 if (core_tile_eb11mp() || core_tile_a9mp())
115 iotable_init(realview_eb11mp_io_desc, ARRAY_SIZE(realview_eb11mp_io_desc));
116 }
117
118 static struct pl061_platform_data gpio0_plat_data = {
119 .gpio_base = 0,
120 .irq_base = -1,
121 };
122
123 static struct pl061_platform_data gpio1_plat_data = {
124 .gpio_base = 8,
125 .irq_base = -1,
126 };
127
128 static struct pl061_platform_data gpio2_plat_data = {
129 .gpio_base = 16,
130 .irq_base = -1,
131 };
132
133 static struct pl022_ssp_controller ssp0_plat_data = {
134 .bus_id = 0,
135 .enable_dma = 0,
136 .num_chipselect = 1,
137 };
138
139 /*
140 * RealView EB AMBA devices
141 */
142
143 /*
144 * These devices are connected via the core APB bridge
145 */
146 #define GPIO2_IRQ { IRQ_EB_GPIO2, NO_IRQ }
147 #define GPIO3_IRQ { IRQ_EB_GPIO3, NO_IRQ }
148
149 #define AACI_IRQ { IRQ_EB_AACI, NO_IRQ }
150 #define MMCI0_IRQ { IRQ_EB_MMCI0A, IRQ_EB_MMCI0B }
151 #define KMI0_IRQ { IRQ_EB_KMI0, NO_IRQ }
152 #define KMI1_IRQ { IRQ_EB_KMI1, NO_IRQ }
153
154 /*
155 * These devices are connected directly to the multi-layer AHB switch
156 */
157 #define EB_SMC_IRQ { NO_IRQ, NO_IRQ }
158 #define MPMC_IRQ { NO_IRQ, NO_IRQ }
159 #define EB_CLCD_IRQ { IRQ_EB_CLCD, NO_IRQ }
160 #define DMAC_IRQ { IRQ_EB_DMA, NO_IRQ }
161
162 /*
163 * These devices are connected via the core APB bridge
164 */
165 #define SCTL_IRQ { NO_IRQ, NO_IRQ }
166 #define EB_WATCHDOG_IRQ { IRQ_EB_WDOG, NO_IRQ }
167 #define EB_GPIO0_IRQ { IRQ_EB_GPIO0, NO_IRQ }
168 #define GPIO1_IRQ { IRQ_EB_GPIO1, NO_IRQ }
169 #define EB_RTC_IRQ { IRQ_EB_RTC, NO_IRQ }
170
171 /*
172 * These devices are connected via the DMA APB bridge
173 */
174 #define SCI_IRQ { IRQ_EB_SCI, NO_IRQ }
175 #define EB_UART0_IRQ { IRQ_EB_UART0, NO_IRQ }
176 #define EB_UART1_IRQ { IRQ_EB_UART1, NO_IRQ }
177 #define EB_UART2_IRQ { IRQ_EB_UART2, NO_IRQ }
178 #define EB_UART3_IRQ { IRQ_EB_UART3, NO_IRQ }
179 #define EB_SSP_IRQ { IRQ_EB_SSP, NO_IRQ }
180
181 /* FPGA Primecells */
182 AMBA_DEVICE(aaci, "fpga:aaci", AACI, NULL);
183 AMBA_DEVICE(mmc0, "fpga:mmc0", MMCI0, &realview_mmc0_plat_data);
184 AMBA_DEVICE(kmi0, "fpga:kmi0", KMI0, NULL);
185 AMBA_DEVICE(kmi1, "fpga:kmi1", KMI1, NULL);
186 AMBA_DEVICE(uart3, "fpga:uart3", EB_UART3, NULL);
187
188 /* DevChip Primecells */
189 AMBA_DEVICE(smc, "dev:smc", EB_SMC, NULL);
190 AMBA_DEVICE(clcd, "dev:clcd", EB_CLCD, &clcd_plat_data);
191 AMBA_DEVICE(dmac, "dev:dmac", DMAC, NULL);
192 AMBA_DEVICE(sctl, "dev:sctl", SCTL, NULL);
193 AMBA_DEVICE(wdog, "dev:wdog", EB_WATCHDOG, NULL);
194 AMBA_DEVICE(gpio0, "dev:gpio0", EB_GPIO0, &gpio0_plat_data);
195 AMBA_DEVICE(gpio1, "dev:gpio1", GPIO1, &gpio1_plat_data);
196 AMBA_DEVICE(gpio2, "dev:gpio2", GPIO2, &gpio2_plat_data);
197 AMBA_DEVICE(rtc, "dev:rtc", EB_RTC, NULL);
198 AMBA_DEVICE(sci0, "dev:sci0", SCI, NULL);
199 AMBA_DEVICE(uart0, "dev:uart0", EB_UART0, NULL);
200 AMBA_DEVICE(uart1, "dev:uart1", EB_UART1, NULL);
201 AMBA_DEVICE(uart2, "dev:uart2", EB_UART2, NULL);
202 AMBA_DEVICE(ssp0, "dev:ssp0", EB_SSP, &ssp0_plat_data);
203
204 static struct amba_device *amba_devs[] __initdata = {
205 &dmac_device,
206 &uart0_device,
207 &uart1_device,
208 &uart2_device,
209 &uart3_device,
210 &smc_device,
211 &clcd_device,
212 &sctl_device,
213 &wdog_device,
214 &gpio0_device,
215 &gpio1_device,
216 &gpio2_device,
217 &rtc_device,
218 &sci0_device,
219 &ssp0_device,
220 &aaci_device,
221 &mmc0_device,
222 &kmi0_device,
223 &kmi1_device,
224 };
225
226 /*
227 * RealView EB platform devices
228 */
229 static struct resource realview_eb_flash_resource = {
230 .start = REALVIEW_EB_FLASH_BASE,
231 .end = REALVIEW_EB_FLASH_BASE + REALVIEW_EB_FLASH_SIZE - 1,
232 .flags = IORESOURCE_MEM,
233 };
234
235 static struct resource realview_eb_eth_resources[] = {
236 [0] = {
237 .start = REALVIEW_EB_ETH_BASE,
238 .end = REALVIEW_EB_ETH_BASE + SZ_64K - 1,
239 .flags = IORESOURCE_MEM,
240 },
241 [1] = {
242 .start = IRQ_EB_ETH,
243 .end = IRQ_EB_ETH,
244 .flags = IORESOURCE_IRQ,
245 },
246 };
247
248 /*
249 * Detect and register the correct Ethernet device. RealView/EB rev D
250 * platforms use the newer SMSC LAN9118 Ethernet chip
251 */
252 static int eth_device_register(void)
253 {
254 void __iomem *eth_addr = ioremap(REALVIEW_EB_ETH_BASE, SZ_4K);
255 const char *name = NULL;
256 u32 idrev;
257
258 if (!eth_addr)
259 return -ENOMEM;
260
261 idrev = readl(eth_addr + 0x50);
262 if ((idrev & 0xFFFF0000) != 0x01180000)
263 /* SMSC LAN9118 not present, use LAN91C111 instead */
264 name = "smc91x";
265
266 iounmap(eth_addr);
267 return realview_eth_register(name, realview_eb_eth_resources);
268 }
269
270 static struct resource realview_eb_isp1761_resources[] = {
271 [0] = {
272 .start = REALVIEW_EB_USB_BASE,
273 .end = REALVIEW_EB_USB_BASE + SZ_128K - 1,
274 .flags = IORESOURCE_MEM,
275 },
276 [1] = {
277 .start = IRQ_EB_USB,
278 .end = IRQ_EB_USB,
279 .flags = IORESOURCE_IRQ,
280 },
281 };
282
283 static struct resource pmu_resources[] = {
284 [0] = {
285 .start = IRQ_EB11MP_PMU_CPU0,
286 .end = IRQ_EB11MP_PMU_CPU0,
287 .flags = IORESOURCE_IRQ,
288 },
289 [1] = {
290 .start = IRQ_EB11MP_PMU_CPU1,
291 .end = IRQ_EB11MP_PMU_CPU1,
292 .flags = IORESOURCE_IRQ,
293 },
294 [2] = {
295 .start = IRQ_EB11MP_PMU_CPU2,
296 .end = IRQ_EB11MP_PMU_CPU2,
297 .flags = IORESOURCE_IRQ,
298 },
299 [3] = {
300 .start = IRQ_EB11MP_PMU_CPU3,
301 .end = IRQ_EB11MP_PMU_CPU3,
302 .flags = IORESOURCE_IRQ,
303 },
304 };
305
306 static struct platform_device pmu_device = {
307 .name = "arm-pmu",
308 .id = ARM_PMU_DEVICE_CPU,
309 .num_resources = ARRAY_SIZE(pmu_resources),
310 .resource = pmu_resources,
311 };
312
313 static struct resource char_lcd_resources[] = {
314 {
315 .start = REALVIEW_CHAR_LCD_BASE,
316 .end = (REALVIEW_CHAR_LCD_BASE + SZ_4K - 1),
317 .flags = IORESOURCE_MEM,
318 },
319 {
320 .start = IRQ_EB_CHARLCD,
321 .end = IRQ_EB_CHARLCD,
322 .flags = IORESOURCE_IRQ,
323 },
324 };
325
326 static struct platform_device char_lcd_device = {
327 .name = "arm-charlcd",
328 .id = -1,
329 .num_resources = ARRAY_SIZE(char_lcd_resources),
330 .resource = char_lcd_resources,
331 };
332
333 static void __init gic_init_irq(void)
334 {
335 if (core_tile_eb11mp() || core_tile_a9mp()) {
336 unsigned int pldctrl;
337
338 /* new irq mode */
339 writel(0x0000a05f, __io_address(REALVIEW_SYS_LOCK));
340 pldctrl = readl(__io_address(REALVIEW_SYS_BASE) + REALVIEW_EB11MP_SYS_PLD_CTRL1);
341 pldctrl |= 0x00800000;
342 writel(pldctrl, __io_address(REALVIEW_SYS_BASE) + REALVIEW_EB11MP_SYS_PLD_CTRL1);
343 writel(0x00000000, __io_address(REALVIEW_SYS_LOCK));
344
345 /* core tile GIC, primary */
346 gic_init(0, 29, __io_address(REALVIEW_EB11MP_GIC_DIST_BASE),
347 __io_address(REALVIEW_EB11MP_GIC_CPU_BASE));
348
349 #ifndef CONFIG_REALVIEW_EB_ARM11MP_REVB
350 /* board GIC, secondary */
351 gic_init(1, 96, __io_address(REALVIEW_EB_GIC_DIST_BASE),
352 __io_address(REALVIEW_EB_GIC_CPU_BASE));
353 gic_cascade_irq(1, IRQ_EB11MP_EB_IRQ1);
354 #endif
355 } else {
356 /* board GIC, primary */
357 gic_init(0, 29, __io_address(REALVIEW_EB_GIC_DIST_BASE),
358 __io_address(REALVIEW_EB_GIC_CPU_BASE));
359 }
360 }
361
362 /*
363 * Fix up the IRQ numbers for the RealView EB/ARM11MPCore tile
364 */
365 static void realview_eb11mp_fixup(void)
366 {
367 /* AMBA devices */
368 dmac_device.irq[0] = IRQ_EB11MP_DMA;
369 uart0_device.irq[0] = IRQ_EB11MP_UART0;
370 uart1_device.irq[0] = IRQ_EB11MP_UART1;
371 uart2_device.irq[0] = IRQ_EB11MP_UART2;
372 uart3_device.irq[0] = IRQ_EB11MP_UART3;
373 clcd_device.irq[0] = IRQ_EB11MP_CLCD;
374 wdog_device.irq[0] = IRQ_EB11MP_WDOG;
375 gpio0_device.irq[0] = IRQ_EB11MP_GPIO0;
376 gpio1_device.irq[0] = IRQ_EB11MP_GPIO1;
377 gpio2_device.irq[0] = IRQ_EB11MP_GPIO2;
378 rtc_device.irq[0] = IRQ_EB11MP_RTC;
379 sci0_device.irq[0] = IRQ_EB11MP_SCI;
380 ssp0_device.irq[0] = IRQ_EB11MP_SSP;
381 aaci_device.irq[0] = IRQ_EB11MP_AACI;
382 mmc0_device.irq[0] = IRQ_EB11MP_MMCI0A;
383 mmc0_device.irq[1] = IRQ_EB11MP_MMCI0B;
384 kmi0_device.irq[0] = IRQ_EB11MP_KMI0;
385 kmi1_device.irq[0] = IRQ_EB11MP_KMI1;
386
387 /* platform devices */
388 realview_eb_eth_resources[1].start = IRQ_EB11MP_ETH;
389 realview_eb_eth_resources[1].end = IRQ_EB11MP_ETH;
390 realview_eb_isp1761_resources[1].start = IRQ_EB11MP_USB;
391 realview_eb_isp1761_resources[1].end = IRQ_EB11MP_USB;
392 }
393
394 static void __init realview_eb_timer_init(void)
395 {
396 unsigned int timer_irq;
397
398 timer0_va_base = __io_address(REALVIEW_EB_TIMER0_1_BASE);
399 timer1_va_base = __io_address(REALVIEW_EB_TIMER0_1_BASE) + 0x20;
400 timer2_va_base = __io_address(REALVIEW_EB_TIMER2_3_BASE);
401 timer3_va_base = __io_address(REALVIEW_EB_TIMER2_3_BASE) + 0x20;
402
403 if (core_tile_eb11mp() || core_tile_a9mp()) {
404 #ifdef CONFIG_LOCAL_TIMERS
405 twd_base = __io_address(REALVIEW_EB11MP_TWD_BASE);
406 #endif
407 timer_irq = IRQ_EB11MP_TIMER0_1;
408 } else
409 timer_irq = IRQ_EB_TIMER0_1;
410
411 realview_timer_init(timer_irq);
412 }
413
414 static struct sys_timer realview_eb_timer = {
415 .init = realview_eb_timer_init,
416 };
417
418 static void realview_eb_reset(char mode)
419 {
420 void __iomem *reset_ctrl = __io_address(REALVIEW_SYS_RESETCTL);
421 void __iomem *lock_ctrl = __io_address(REALVIEW_SYS_LOCK);
422
423 /*
424 * To reset, we hit the on-board reset register
425 * in the system FPGA
426 */
427 __raw_writel(REALVIEW_SYS_LOCK_VAL, lock_ctrl);
428 if (core_tile_eb11mp())
429 __raw_writel(0x0008, reset_ctrl);
430 }
431
432 static void __init realview_eb_init(void)
433 {
434 int i;
435
436 if (core_tile_eb11mp() || core_tile_a9mp()) {
437 realview_eb11mp_fixup();
438
439 #ifdef CONFIG_CACHE_L2X0
440 /* 1MB (128KB/way), 8-way associativity, evmon/parity/share enabled
441 * Bits: .... ...0 0111 1001 0000 .... .... .... */
442 l2x0_init(__io_address(REALVIEW_EB11MP_L220_BASE), 0x00790000, 0xfe000fff);
443 #endif
444 platform_device_register(&pmu_device);
445 }
446
447 realview_flash_register(&realview_eb_flash_resource, 1);
448 platform_device_register(&realview_i2c_device);
449 platform_device_register(&char_lcd_device);
450 eth_device_register();
451 realview_usb_register(realview_eb_isp1761_resources);
452
453 for (i = 0; i < ARRAY_SIZE(amba_devs); i++) {
454 struct amba_device *d = amba_devs[i];
455 amba_device_register(d, &iomem_resource);
456 }
457
458 #ifdef CONFIG_LEDS
459 leds_event = realview_leds_event;
460 #endif
461 realview_reset = realview_eb_reset;
462 }
463
464 MACHINE_START(REALVIEW_EB, "ARM-RealView EB")
465 /* Maintainer: ARM Ltd/Deep Blue Solutions Ltd */
466 .boot_params = PLAT_PHYS_OFFSET + 0x00000100,
467 .fixup = realview_fixup,
468 .map_io = realview_eb_map_io,
469 .init_early = realview_init_early,
470 .init_irq = gic_init_irq,
471 .timer = &realview_eb_timer,
472 .init_machine = realview_eb_init,
473 #ifdef CONFIG_ZONE_DMA
474 .dma_zone_size = SZ_256M,
475 #endif
476 MACHINE_END
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