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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 <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 
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                   = "armv7-pmu",
284         .id                     = -1,
285         .num_resources          = ARRAY_SIZE(pmu_resources),
286         .resource               = pmu_resources,
287 };
288 
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 
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 
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 
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 
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 
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 

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