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Linux/arch/arm/mach-realview/realview_pbx.c

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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 "hardware.h"
 45 #include "board-pbx.h"
 46 #include "irqs-pbx.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_DEBUG_LL
 83         {
 84                 .virtual        = IO_ADDRESS(REALVIEW_PBX_UART0_BASE),
 85                 .pfn            = __phys_to_pfn(REALVIEW_PBX_UART0_BASE),
 86                 .length         = SZ_4K,
 87                 .type           = MT_DEVICE,
 88         },
 89 #endif
 90 };
 91 
 92 static struct map_desc realview_local_io_desc[] __initdata = {
 93         {
 94                 .virtual        = IO_ADDRESS(REALVIEW_PBX_TILE_SCU_BASE),
 95                 .pfn            = __phys_to_pfn(REALVIEW_PBX_TILE_SCU_BASE),
 96                 .length         = SZ_4K,
 97                 .type           = MT_DEVICE,
 98         }, {
 99                 .virtual        = IO_ADDRESS(REALVIEW_PBX_TILE_GIC_DIST_BASE),
100                 .pfn            = __phys_to_pfn(REALVIEW_PBX_TILE_GIC_DIST_BASE),
101                 .length         = SZ_4K,
102                 .type           = MT_DEVICE,
103         }, {
104                 .virtual        = IO_ADDRESS(REALVIEW_PBX_TILE_L220_BASE),
105                 .pfn            = __phys_to_pfn(REALVIEW_PBX_TILE_L220_BASE),
106                 .length         = SZ_8K,
107                 .type           = MT_DEVICE,
108         }
109 };
110 
111 static void __init realview_pbx_map_io(void)
112 {
113         iotable_init(realview_pbx_io_desc, ARRAY_SIZE(realview_pbx_io_desc));
114         if (core_tile_pbx11mp() || core_tile_pbxa9mp())
115                 iotable_init(realview_local_io_desc, ARRAY_SIZE(realview_local_io_desc));
116 }
117 
118 static struct pl061_platform_data gpio0_plat_data = {
119         .gpio_base      = 0,
120 };
121 
122 static struct pl061_platform_data gpio1_plat_data = {
123         .gpio_base      = 8,
124 };
125 
126 static struct pl061_platform_data gpio2_plat_data = {
127         .gpio_base      = 16,
128 };
129 
130 static struct pl022_ssp_controller ssp0_plat_data = {
131         .bus_id = 0,
132         .enable_dma = 0,
133         .num_chipselect = 1,
134 };
135 
136 /*
137  * RealView PBXCore AMBA devices
138  */
139 
140 #define GPIO2_IRQ               { IRQ_PBX_GPIO2 }
141 #define GPIO3_IRQ               { IRQ_PBX_GPIO3 }
142 #define AACI_IRQ                { IRQ_PBX_AACI }
143 #define MMCI0_IRQ               { IRQ_PBX_MMCI0A, IRQ_PBX_MMCI0B }
144 #define KMI0_IRQ                { IRQ_PBX_KMI0 }
145 #define KMI1_IRQ                { IRQ_PBX_KMI1 }
146 #define PBX_SMC_IRQ             { }
147 #define MPMC_IRQ                { }
148 #define PBX_CLCD_IRQ            { IRQ_PBX_CLCD }
149 #define DMAC_IRQ                { IRQ_PBX_DMAC }
150 #define SCTL_IRQ                { }
151 #define PBX_WATCHDOG_IRQ        { IRQ_PBX_WATCHDOG }
152 #define PBX_GPIO0_IRQ           { IRQ_PBX_GPIO0 }
153 #define GPIO1_IRQ               { IRQ_PBX_GPIO1 }
154 #define PBX_RTC_IRQ             { IRQ_PBX_RTC }
155 #define SCI_IRQ                 { IRQ_PBX_SCI }
156 #define PBX_UART0_IRQ           { IRQ_PBX_UART0 }
157 #define PBX_UART1_IRQ           { IRQ_PBX_UART1 }
158 #define PBX_UART2_IRQ           { IRQ_PBX_UART2 }
159 #define PBX_UART3_IRQ           { IRQ_PBX_UART3 }
160 #define PBX_SSP_IRQ             { IRQ_PBX_SSP }
161 
162 /* FPGA Primecells */
163 APB_DEVICE(aaci,        "fpga:aaci",    AACI,           NULL);
164 APB_DEVICE(mmc0,        "fpga:mmc0",    MMCI0,          &realview_mmc0_plat_data);
165 APB_DEVICE(kmi0,        "fpga:kmi0",    KMI0,           NULL);
166 APB_DEVICE(kmi1,        "fpga:kmi1",    KMI1,           NULL);
167 APB_DEVICE(uart3,       "fpga:uart3",   PBX_UART3,      NULL);
168 
169 /* DevChip Primecells */
170 AHB_DEVICE(smc, "dev:smc",      PBX_SMC,        NULL);
171 AHB_DEVICE(sctl,        "dev:sctl",     SCTL,           NULL);
172 APB_DEVICE(wdog,        "dev:wdog",     PBX_WATCHDOG,   NULL);
173 APB_DEVICE(gpio0,       "dev:gpio0",    PBX_GPIO0,      &gpio0_plat_data);
174 APB_DEVICE(gpio1,       "dev:gpio1",    GPIO1,          &gpio1_plat_data);
175 APB_DEVICE(gpio2,       "dev:gpio2",    GPIO2,          &gpio2_plat_data);
176 APB_DEVICE(rtc,         "dev:rtc",      PBX_RTC,        NULL);
177 APB_DEVICE(sci0,        "dev:sci0",     SCI,            NULL);
178 APB_DEVICE(uart0,       "dev:uart0",    PBX_UART0,      NULL);
179 APB_DEVICE(uart1,       "dev:uart1",    PBX_UART1,      NULL);
180 APB_DEVICE(uart2,       "dev:uart2",    PBX_UART2,      NULL);
181 APB_DEVICE(ssp0,        "dev:ssp0",     PBX_SSP,        &ssp0_plat_data);
182 
183 /* Primecells on the NEC ISSP chip */
184 AHB_DEVICE(clcd,        "issp:clcd",    PBX_CLCD,       &clcd_plat_data);
185 AHB_DEVICE(dmac,        "issp:dmac",    DMAC,           NULL);
186 
187 static struct amba_device *amba_devs[] __initdata = {
188         &dmac_device,
189         &uart0_device,
190         &uart1_device,
191         &uart2_device,
192         &uart3_device,
193         &smc_device,
194         &clcd_device,
195         &sctl_device,
196         &wdog_device,
197         &gpio0_device,
198         &gpio1_device,
199         &gpio2_device,
200         &rtc_device,
201         &sci0_device,
202         &ssp0_device,
203         &aaci_device,
204         &mmc0_device,
205         &kmi0_device,
206         &kmi1_device,
207 };
208 
209 /*
210  * RealView PB-X platform devices
211  */
212 static struct resource realview_pbx_flash_resources[] = {
213         [0] = {
214                 .start          = REALVIEW_PBX_FLASH0_BASE,
215                 .end            = REALVIEW_PBX_FLASH0_BASE + REALVIEW_PBX_FLASH0_SIZE - 1,
216                 .flags          = IORESOURCE_MEM,
217         },
218         [1] = {
219                 .start          = REALVIEW_PBX_FLASH1_BASE,
220                 .end            = REALVIEW_PBX_FLASH1_BASE + REALVIEW_PBX_FLASH1_SIZE - 1,
221                 .flags          = IORESOURCE_MEM,
222         },
223 };
224 
225 static struct resource realview_pbx_smsc911x_resources[] = {
226         [0] = {
227                 .start          = REALVIEW_PBX_ETH_BASE,
228                 .end            = REALVIEW_PBX_ETH_BASE + SZ_64K - 1,
229                 .flags          = IORESOURCE_MEM,
230         },
231         [1] = {
232                 .start          = IRQ_PBX_ETH,
233                 .end            = IRQ_PBX_ETH,
234                 .flags          = IORESOURCE_IRQ,
235         },
236 };
237 
238 static struct resource realview_pbx_isp1761_resources[] = {
239         [0] = {
240                 .start          = REALVIEW_PBX_USB_BASE,
241                 .end            = REALVIEW_PBX_USB_BASE + SZ_128K - 1,
242                 .flags          = IORESOURCE_MEM,
243         },
244         [1] = {
245                 .start          = IRQ_PBX_USB,
246                 .end            = IRQ_PBX_USB,
247                 .flags          = IORESOURCE_IRQ,
248         },
249 };
250 
251 #ifdef CONFIG_CACHE_L2X0
252 static struct resource pmu_resources[] = {
253         [0] = {
254                 .start          = IRQ_PBX_PMU_CPU0,
255                 .end            = IRQ_PBX_PMU_CPU0,
256                 .flags          = IORESOURCE_IRQ,
257         },
258         [1] = {
259                 .start          = IRQ_PBX_PMU_CPU1,
260                 .end            = IRQ_PBX_PMU_CPU1,
261                 .flags          = IORESOURCE_IRQ,
262         },
263         [2] = {
264                 .start          = IRQ_PBX_PMU_CPU2,
265                 .end            = IRQ_PBX_PMU_CPU2,
266                 .flags          = IORESOURCE_IRQ,
267         },
268         [3] = {
269                 .start          = IRQ_PBX_PMU_CPU3,
270                 .end            = IRQ_PBX_PMU_CPU3,
271                 .flags          = IORESOURCE_IRQ,
272         },
273 };
274 
275 static struct platform_device pmu_device = {
276         .name                   = "armv7-pmu",
277         .id                     = -1,
278         .num_resources          = ARRAY_SIZE(pmu_resources),
279         .resource               = pmu_resources,
280 };
281 #endif
282 
283 static void __init gic_init_irq(void)
284 {
285         /* ARM PBX on-board GIC */
286         if (core_tile_pbx11mp() || core_tile_pbxa9mp()) {
287                 gic_init(0, 29, __io_address(REALVIEW_PBX_TILE_GIC_DIST_BASE),
288                          __io_address(REALVIEW_PBX_TILE_GIC_CPU_BASE));
289         } else {
290                 gic_init(0, IRQ_PBX_GIC_START,
291                          __io_address(REALVIEW_PBX_GIC_DIST_BASE),
292                          __io_address(REALVIEW_PBX_GIC_CPU_BASE));
293         }
294 }
295 
296 #ifdef CONFIG_HAVE_ARM_TWD
297 static DEFINE_TWD_LOCAL_TIMER(twd_local_timer,
298                               REALVIEW_PBX_TILE_TWD_BASE,
299                               IRQ_LOCALTIMER);
300 
301 static void __init realview_pbx_twd_init(void)
302 {
303         int err = twd_local_timer_register(&twd_local_timer);
304         if (err)
305                 pr_err("twd_local_timer_register failed %d\n", err);
306 }
307 #else
308 #define realview_pbx_twd_init() do { } while(0)
309 #endif
310 
311 static void __init realview_pbx_timer_init(void)
312 {
313         timer0_va_base = __io_address(REALVIEW_PBX_TIMER0_1_BASE);
314         timer1_va_base = __io_address(REALVIEW_PBX_TIMER0_1_BASE) + 0x20;
315         timer2_va_base = __io_address(REALVIEW_PBX_TIMER2_3_BASE);
316         timer3_va_base = __io_address(REALVIEW_PBX_TIMER2_3_BASE) + 0x20;
317 
318         realview_clk_init(__io_address(REALVIEW_SYS_BASE), false);
319         realview_timer_init(IRQ_PBX_TIMER0_1);
320         realview_pbx_twd_init();
321 }
322 
323 static void realview_pbx_fixup(struct tag *tags, char **from)
324 {
325 #ifdef CONFIG_SPARSEMEM
326         /*
327          * Memory configuration with SPARSEMEM enabled on RealView PBX (see
328          * asm/mach/memory.h for more information).
329          */
330 
331         memblock_add(0, SZ_256M);
332         memblock_add(0x20000000, SZ_512M);
333         memblock_add(0x80000000, SZ_256M);
334 #else
335         realview_fixup(tags, from);
336 #endif
337 }
338 
339 static void realview_pbx_restart(enum reboot_mode mode, const char *cmd)
340 {
341         void __iomem *reset_ctrl = __io_address(REALVIEW_SYS_RESETCTL);
342         void __iomem *lock_ctrl = __io_address(REALVIEW_SYS_LOCK);
343 
344         /*
345          * To reset, we hit the on-board reset register
346          * in the system FPGA
347          */
348         __raw_writel(REALVIEW_SYS_LOCK_VAL, lock_ctrl);
349         __raw_writel(0x00F0, reset_ctrl);
350         __raw_writel(0x00F4, reset_ctrl);
351         dsb();
352 }
353 
354 static void __init realview_pbx_init(void)
355 {
356         int i;
357 
358 #ifdef CONFIG_CACHE_L2X0
359         if (core_tile_pbxa9mp()) {
360                 void __iomem *l2x0_base =
361                         __io_address(REALVIEW_PBX_TILE_L220_BASE);
362 
363                 /* set RAM latencies to 1 cycle for eASIC */
364                 writel(0, l2x0_base + L310_TAG_LATENCY_CTRL);
365                 writel(0, l2x0_base + L310_DATA_LATENCY_CTRL);
366 
367                 /* 16KB way size, 8-way associativity, parity disabled
368                  * Bits:  .. 0 0 0 0 1 00 1 0 1 001 0 000 0 .... .... .... */
369                 l2x0_init(l2x0_base, 0x02520000, 0xc0000fff);
370                 platform_device_register(&pmu_device);
371         }
372 #endif
373 
374         realview_flash_register(realview_pbx_flash_resources,
375                                 ARRAY_SIZE(realview_pbx_flash_resources));
376         realview_eth_register(NULL, realview_pbx_smsc911x_resources);
377         platform_device_register(&realview_i2c_device);
378         platform_device_register(&realview_cf_device);
379         platform_device_register(&realview_leds_device);
380         realview_usb_register(realview_pbx_isp1761_resources);
381 
382         for (i = 0; i < ARRAY_SIZE(amba_devs); i++) {
383                 struct amba_device *d = amba_devs[i];
384                 amba_device_register(d, &iomem_resource);
385         }
386 }
387 
388 MACHINE_START(REALVIEW_PBX, "ARM-RealView PBX")
389         /* Maintainer: ARM Ltd/Deep Blue Solutions Ltd */
390         .atag_offset    = 0x100,
391         .smp            = smp_ops(realview_smp_ops),
392         .fixup          = realview_pbx_fixup,
393         .map_io         = realview_pbx_map_io,
394         .init_early     = realview_init_early,
395         .init_irq       = gic_init_irq,
396         .init_time      = realview_pbx_timer_init,
397         .init_machine   = realview_pbx_init,
398 #ifdef CONFIG_ZONE_DMA
399         .dma_zone_size  = SZ_256M,
400 #endif
401         .restart        = realview_pbx_restart,
402 MACHINE_END
403 

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