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1 /*
2  *  arch/arm/mach-realview/realview_pbx.c
3  *
4  *  Copyright (C) 2009 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 version 2 as
9  * published by the Free Software Foundation.
10  *
11  * This program is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  * GNU General Public License for more details.
15  *
16  * You should have received a copy of the GNU General Public License
17  * along with this program; if not, write to the Free Software
18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
19  */
20 
21 #include <linux/init.h>
22 #include <linux/platform_device.h>
23 #include <linux/device.h>
24 #include <linux/amba/bus.h>
25 #include <linux/amba/pl061.h>
26 #include <linux/amba/mmci.h>
27 #include <linux/amba/pl022.h>
28 #include <linux/io.h>
29 #include <linux/irqchip/arm-gic.h>
30 #include <linux/platform_data/clk-realview.h>
31 #include <linux/reboot.h>
32 #include <linux/memblock.h>
33 
34 #include <asm/irq.h>
35 #include <asm/mach-types.h>
36 #include <asm/smp_twd.h>
37 #include <asm/pgtable.h>
38 #include <asm/hardware/cache-l2x0.h>
39 
40 #include <asm/mach/arch.h>
41 #include <asm/mach/map.h>
42 #include <asm/mach/time.h>
43 
44 #include <mach/hardware.h>
45 #include <mach/board-pbx.h>
46 #include <mach/irqs.h>
47 
48 #include "core.h"
49 
50 static struct map_desc realview_pbx_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_PBX_GIC_CPU_BASE),
58 		.pfn		= __phys_to_pfn(REALVIEW_PBX_GIC_CPU_BASE),
59 		.length		= SZ_4K,
60 		.type		= MT_DEVICE,
61 	}, {
62 		.virtual	= IO_ADDRESS(REALVIEW_PBX_GIC_DIST_BASE),
63 		.pfn		= __phys_to_pfn(REALVIEW_PBX_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_PBX_TIMER0_1_BASE),
73 		.pfn		= __phys_to_pfn(REALVIEW_PBX_TIMER0_1_BASE),
74 		.length		= SZ_4K,
75 		.type		= MT_DEVICE,
76 	}, {
77 		.virtual	= IO_ADDRESS(REALVIEW_PBX_TIMER2_3_BASE),
78 		.pfn		= __phys_to_pfn(REALVIEW_PBX_TIMER2_3_BASE),
79 		.length		= SZ_4K,
80 		.type		= MT_DEVICE,
81 	},
82 #ifdef CONFIG_PCI
83 	{
84 		.virtual	= PCIX_UNIT_BASE,
85 		.pfn		= __phys_to_pfn(REALVIEW_PBX_PCI_BASE),
86 		.length		= REALVIEW_PBX_PCI_BASE_SIZE,
87 		.type		= MT_DEVICE,
88 	},
89 #endif
90 #ifdef CONFIG_DEBUG_LL
91 	{
92 		.virtual	= IO_ADDRESS(REALVIEW_PBX_UART0_BASE),
93 		.pfn		= __phys_to_pfn(REALVIEW_PBX_UART0_BASE),
94 		.length		= SZ_4K,
95 		.type		= MT_DEVICE,
96 	},
97 #endif
98 };
99 
100 static struct map_desc realview_local_io_desc[] __initdata = {
101 	{
102 		.virtual        = IO_ADDRESS(REALVIEW_PBX_TILE_SCU_BASE),
103 		.pfn            = __phys_to_pfn(REALVIEW_PBX_TILE_SCU_BASE),
104 		.length         = SZ_4K,
105 		.type           = MT_DEVICE,
106 	}, {
107 		.virtual        = IO_ADDRESS(REALVIEW_PBX_TILE_GIC_DIST_BASE),
108 		.pfn            = __phys_to_pfn(REALVIEW_PBX_TILE_GIC_DIST_BASE),
109 		.length         = SZ_4K,
110 		.type           = MT_DEVICE,
111 	}, {
112 		.virtual        = IO_ADDRESS(REALVIEW_PBX_TILE_L220_BASE),
113 		.pfn            = __phys_to_pfn(REALVIEW_PBX_TILE_L220_BASE),
114 		.length         = SZ_8K,
115 		.type           = MT_DEVICE,
116 	}
117 };
118 
realview_pbx_map_io(void)119 static void __init realview_pbx_map_io(void)
120 {
121 	iotable_init(realview_pbx_io_desc, ARRAY_SIZE(realview_pbx_io_desc));
122 	if (core_tile_pbx11mp() || core_tile_pbxa9mp())
123 		iotable_init(realview_local_io_desc, ARRAY_SIZE(realview_local_io_desc));
124 }
125 
126 static struct pl061_platform_data gpio0_plat_data = {
127 	.gpio_base	= 0,
128 };
129 
130 static struct pl061_platform_data gpio1_plat_data = {
131 	.gpio_base	= 8,
132 };
133 
134 static struct pl061_platform_data gpio2_plat_data = {
135 	.gpio_base	= 16,
136 };
137 
138 static struct pl022_ssp_controller ssp0_plat_data = {
139 	.bus_id = 0,
140 	.enable_dma = 0,
141 	.num_chipselect = 1,
142 };
143 
144 /*
145  * RealView PBXCore AMBA devices
146  */
147 
148 #define GPIO2_IRQ		{ IRQ_PBX_GPIO2 }
149 #define GPIO3_IRQ		{ IRQ_PBX_GPIO3 }
150 #define AACI_IRQ		{ IRQ_PBX_AACI }
151 #define MMCI0_IRQ		{ IRQ_PBX_MMCI0A, IRQ_PBX_MMCI0B }
152 #define KMI0_IRQ		{ IRQ_PBX_KMI0 }
153 #define KMI1_IRQ		{ IRQ_PBX_KMI1 }
154 #define PBX_SMC_IRQ		{ }
155 #define MPMC_IRQ		{ }
156 #define PBX_CLCD_IRQ		{ IRQ_PBX_CLCD }
157 #define DMAC_IRQ		{ IRQ_PBX_DMAC }
158 #define SCTL_IRQ		{ }
159 #define PBX_WATCHDOG_IRQ	{ IRQ_PBX_WATCHDOG }
160 #define PBX_GPIO0_IRQ		{ IRQ_PBX_GPIO0 }
161 #define GPIO1_IRQ		{ IRQ_PBX_GPIO1 }
162 #define PBX_RTC_IRQ		{ IRQ_PBX_RTC }
163 #define SCI_IRQ			{ IRQ_PBX_SCI }
164 #define PBX_UART0_IRQ		{ IRQ_PBX_UART0 }
165 #define PBX_UART1_IRQ		{ IRQ_PBX_UART1 }
166 #define PBX_UART2_IRQ		{ IRQ_PBX_UART2 }
167 #define PBX_UART3_IRQ		{ IRQ_PBX_UART3 }
168 #define PBX_SSP_IRQ		{ IRQ_PBX_SSP }
169 
170 /* FPGA Primecells */
171 APB_DEVICE(aaci,	"fpga:aaci",	AACI,		NULL);
172 APB_DEVICE(mmc0,	"fpga:mmc0",	MMCI0,		&realview_mmc0_plat_data);
173 APB_DEVICE(kmi0,	"fpga:kmi0",	KMI0,		NULL);
174 APB_DEVICE(kmi1,	"fpga:kmi1",	KMI1,		NULL);
175 APB_DEVICE(uart3,	"fpga:uart3",	PBX_UART3,	NULL);
176 
177 /* DevChip Primecells */
178 AHB_DEVICE(smc,	"dev:smc",	PBX_SMC,	NULL);
179 AHB_DEVICE(sctl,	"dev:sctl",	SCTL,		NULL);
180 APB_DEVICE(wdog,	"dev:wdog",	PBX_WATCHDOG, 	NULL);
181 APB_DEVICE(gpio0,	"dev:gpio0",	PBX_GPIO0,	&gpio0_plat_data);
182 APB_DEVICE(gpio1,	"dev:gpio1",	GPIO1,		&gpio1_plat_data);
183 APB_DEVICE(gpio2,	"dev:gpio2",	GPIO2,		&gpio2_plat_data);
184 APB_DEVICE(rtc,		"dev:rtc",	PBX_RTC,	NULL);
185 APB_DEVICE(sci0,	"dev:sci0",	SCI,		NULL);
186 APB_DEVICE(uart0,	"dev:uart0",	PBX_UART0,	NULL);
187 APB_DEVICE(uart1,	"dev:uart1",	PBX_UART1,	NULL);
188 APB_DEVICE(uart2,	"dev:uart2",	PBX_UART2,	NULL);
189 APB_DEVICE(ssp0,	"dev:ssp0",	PBX_SSP,	&ssp0_plat_data);
190 
191 /* Primecells on the NEC ISSP chip */
192 AHB_DEVICE(clcd,	"issp:clcd",	PBX_CLCD,	&clcd_plat_data);
193 AHB_DEVICE(dmac,	"issp:dmac",	DMAC,		NULL);
194 
195 static struct amba_device *amba_devs[] __initdata = {
196 	&dmac_device,
197 	&uart0_device,
198 	&uart1_device,
199 	&uart2_device,
200 	&uart3_device,
201 	&smc_device,
202 	&clcd_device,
203 	&sctl_device,
204 	&wdog_device,
205 	&gpio0_device,
206 	&gpio1_device,
207 	&gpio2_device,
208 	&rtc_device,
209 	&sci0_device,
210 	&ssp0_device,
211 	&aaci_device,
212 	&mmc0_device,
213 	&kmi0_device,
214 	&kmi1_device,
215 };
216 
217 /*
218  * RealView PB-X platform devices
219  */
220 static struct resource realview_pbx_flash_resources[] = {
221 	[0] = {
222 		.start          = REALVIEW_PBX_FLASH0_BASE,
223 		.end            = REALVIEW_PBX_FLASH0_BASE + REALVIEW_PBX_FLASH0_SIZE - 1,
224 		.flags          = IORESOURCE_MEM,
225 	},
226 	[1] = {
227 		.start          = REALVIEW_PBX_FLASH1_BASE,
228 		.end            = REALVIEW_PBX_FLASH1_BASE + REALVIEW_PBX_FLASH1_SIZE - 1,
229 		.flags          = IORESOURCE_MEM,
230 	},
231 };
232 
233 static struct resource realview_pbx_smsc911x_resources[] = {
234 	[0] = {
235 		.start		= REALVIEW_PBX_ETH_BASE,
236 		.end		= REALVIEW_PBX_ETH_BASE + SZ_64K - 1,
237 		.flags		= IORESOURCE_MEM,
238 	},
239 	[1] = {
240 		.start		= IRQ_PBX_ETH,
241 		.end		= IRQ_PBX_ETH,
242 		.flags		= IORESOURCE_IRQ,
243 	},
244 };
245 
246 static struct resource realview_pbx_isp1761_resources[] = {
247 	[0] = {
248 		.start		= REALVIEW_PBX_USB_BASE,
249 		.end		= REALVIEW_PBX_USB_BASE + SZ_128K - 1,
250 		.flags		= IORESOURCE_MEM,
251 	},
252 	[1] = {
253 		.start		= IRQ_PBX_USB,
254 		.end		= IRQ_PBX_USB,
255 		.flags		= IORESOURCE_IRQ,
256 	},
257 };
258 
259 static struct resource pmu_resources[] = {
260 	[0] = {
261 		.start		= IRQ_PBX_PMU_CPU0,
262 		.end		= IRQ_PBX_PMU_CPU0,
263 		.flags		= IORESOURCE_IRQ,
264 	},
265 	[1] = {
266 		.start		= IRQ_PBX_PMU_CPU1,
267 		.end		= IRQ_PBX_PMU_CPU1,
268 		.flags		= IORESOURCE_IRQ,
269 	},
270 	[2] = {
271 		.start		= IRQ_PBX_PMU_CPU2,
272 		.end		= IRQ_PBX_PMU_CPU2,
273 		.flags		= IORESOURCE_IRQ,
274 	},
275 	[3] = {
276 		.start		= IRQ_PBX_PMU_CPU3,
277 		.end		= IRQ_PBX_PMU_CPU3,
278 		.flags		= IORESOURCE_IRQ,
279 	},
280 };
281 
282 static struct platform_device pmu_device = {
283 	.name			= "arm-pmu",
284 	.id			= -1,
285 	.num_resources		= ARRAY_SIZE(pmu_resources),
286 	.resource		= pmu_resources,
287 };
288 
gic_init_irq(void)289 static void __init gic_init_irq(void)
290 {
291 	/* ARM PBX on-board GIC */
292 	if (core_tile_pbx11mp() || core_tile_pbxa9mp()) {
293 		gic_init(0, 29, __io_address(REALVIEW_PBX_TILE_GIC_DIST_BASE),
294 			 __io_address(REALVIEW_PBX_TILE_GIC_CPU_BASE));
295 	} else {
296 		gic_init(0, IRQ_PBX_GIC_START,
297 			 __io_address(REALVIEW_PBX_GIC_DIST_BASE),
298 			 __io_address(REALVIEW_PBX_GIC_CPU_BASE));
299 	}
300 }
301 
302 #ifdef CONFIG_HAVE_ARM_TWD
303 static DEFINE_TWD_LOCAL_TIMER(twd_local_timer,
304 			      REALVIEW_PBX_TILE_TWD_BASE,
305 			      IRQ_LOCALTIMER);
306 
realview_pbx_twd_init(void)307 static void __init realview_pbx_twd_init(void)
308 {
309 	int err = twd_local_timer_register(&twd_local_timer);
310 	if (err)
311 		pr_err("twd_local_timer_register failed %d\n", err);
312 }
313 #else
314 #define realview_pbx_twd_init()	do { } while(0)
315 #endif
316 
realview_pbx_timer_init(void)317 static void __init realview_pbx_timer_init(void)
318 {
319 	timer0_va_base = __io_address(REALVIEW_PBX_TIMER0_1_BASE);
320 	timer1_va_base = __io_address(REALVIEW_PBX_TIMER0_1_BASE) + 0x20;
321 	timer2_va_base = __io_address(REALVIEW_PBX_TIMER2_3_BASE);
322 	timer3_va_base = __io_address(REALVIEW_PBX_TIMER2_3_BASE) + 0x20;
323 
324 	realview_clk_init(__io_address(REALVIEW_SYS_BASE), false);
325 	realview_timer_init(IRQ_PBX_TIMER0_1);
326 	realview_pbx_twd_init();
327 }
328 
realview_pbx_fixup(struct tag * tags,char ** from)329 static void realview_pbx_fixup(struct tag *tags, char **from)
330 {
331 #ifdef CONFIG_SPARSEMEM
332 	/*
333 	 * Memory configuration with SPARSEMEM enabled on RealView PBX (see
334 	 * asm/mach/memory.h for more information).
335 	 */
336 
337 	memblock_add(0, SZ_256M);
338 	memblock_add(0x20000000, SZ_512M);
339 	memblock_add(0x80000000, SZ_256M);
340 #else
341 	realview_fixup(tags, from);
342 #endif
343 }
344 
realview_pbx_restart(enum reboot_mode mode,const char * cmd)345 static void realview_pbx_restart(enum reboot_mode mode, const char *cmd)
346 {
347 	void __iomem *reset_ctrl = __io_address(REALVIEW_SYS_RESETCTL);
348 	void __iomem *lock_ctrl = __io_address(REALVIEW_SYS_LOCK);
349 
350 	/*
351 	 * To reset, we hit the on-board reset register
352 	 * in the system FPGA
353 	 */
354 	__raw_writel(REALVIEW_SYS_LOCK_VAL, lock_ctrl);
355 	__raw_writel(0x00F0, reset_ctrl);
356 	__raw_writel(0x00F4, reset_ctrl);
357 	dsb();
358 }
359 
realview_pbx_init(void)360 static void __init realview_pbx_init(void)
361 {
362 	int i;
363 
364 #ifdef CONFIG_CACHE_L2X0
365 	if (core_tile_pbxa9mp()) {
366 		void __iomem *l2x0_base =
367 			__io_address(REALVIEW_PBX_TILE_L220_BASE);
368 
369 		/* set RAM latencies to 1 cycle for eASIC */
370 		writel(0, l2x0_base + L310_TAG_LATENCY_CTRL);
371 		writel(0, l2x0_base + L310_DATA_LATENCY_CTRL);
372 
373 		/* 16KB way size, 8-way associativity, parity disabled
374 		 * Bits:  .. 0 0 0 0 1 00 1 0 1 001 0 000 0 .... .... .... */
375 		l2x0_init(l2x0_base, 0x02520000, 0xc0000fff);
376 		platform_device_register(&pmu_device);
377 	}
378 #endif
379 
380 	realview_flash_register(realview_pbx_flash_resources,
381 				ARRAY_SIZE(realview_pbx_flash_resources));
382 	realview_eth_register(NULL, realview_pbx_smsc911x_resources);
383 	platform_device_register(&realview_i2c_device);
384 	platform_device_register(&realview_cf_device);
385 	platform_device_register(&realview_leds_device);
386 	realview_usb_register(realview_pbx_isp1761_resources);
387 
388 	for (i = 0; i < ARRAY_SIZE(amba_devs); i++) {
389 		struct amba_device *d = amba_devs[i];
390 		amba_device_register(d, &iomem_resource);
391 	}
392 }
393 
394 MACHINE_START(REALVIEW_PBX, "ARM-RealView PBX")
395 	/* Maintainer: ARM Ltd/Deep Blue Solutions Ltd */
396 	.atag_offset	= 0x100,
397 	.smp		= smp_ops(realview_smp_ops),
398 	.fixup		= realview_pbx_fixup,
399 	.map_io		= realview_pbx_map_io,
400 	.init_early	= realview_init_early,
401 	.init_irq	= gic_init_irq,
402 	.init_time	= realview_pbx_timer_init,
403 	.init_machine	= realview_pbx_init,
404 #ifdef CONFIG_ZONE_DMA
405 	.dma_zone_size	= SZ_256M,
406 #endif
407 	.restart	= realview_pbx_restart,
408 MACHINE_END
409