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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 
 33 #include <asm/irq.h>
 34 #include <asm/mach-types.h>
 35 #include <asm/smp_twd.h>
 36 #include <asm/pgtable.h>
 37 #include <asm/hardware/cache-l2x0.h>
 38 
 39 #include <asm/mach/arch.h>
 40 #include <asm/mach/map.h>
 41 #include <asm/mach/time.h>
 42 
 43 #include <mach/hardware.h>
 44 #include <mach/board-pbx.h>
 45 #include <mach/irqs.h>
 46 
 47 #include "core.h"
 48 
 49 static struct map_desc realview_pbx_io_desc[] __initdata = {
 50         {
 51                 .virtual        = IO_ADDRESS(REALVIEW_SYS_BASE),
 52                 .pfn            = __phys_to_pfn(REALVIEW_SYS_BASE),
 53                 .length         = SZ_4K,
 54                 .type           = MT_DEVICE,
 55         }, {
 56                 .virtual        = IO_ADDRESS(REALVIEW_PBX_GIC_CPU_BASE),
 57                 .pfn            = __phys_to_pfn(REALVIEW_PBX_GIC_CPU_BASE),
 58                 .length         = SZ_4K,
 59                 .type           = MT_DEVICE,
 60         }, {
 61                 .virtual        = IO_ADDRESS(REALVIEW_PBX_GIC_DIST_BASE),
 62                 .pfn            = __phys_to_pfn(REALVIEW_PBX_GIC_DIST_BASE),
 63                 .length         = SZ_4K,
 64                 .type           = MT_DEVICE,
 65         }, {
 66                 .virtual        = IO_ADDRESS(REALVIEW_SCTL_BASE),
 67                 .pfn            = __phys_to_pfn(REALVIEW_SCTL_BASE),
 68                 .length         = SZ_4K,
 69                 .type           = MT_DEVICE,
 70         }, {
 71                 .virtual        = IO_ADDRESS(REALVIEW_PBX_TIMER0_1_BASE),
 72                 .pfn            = __phys_to_pfn(REALVIEW_PBX_TIMER0_1_BASE),
 73                 .length         = SZ_4K,
 74                 .type           = MT_DEVICE,
 75         }, {
 76                 .virtual        = IO_ADDRESS(REALVIEW_PBX_TIMER2_3_BASE),
 77                 .pfn            = __phys_to_pfn(REALVIEW_PBX_TIMER2_3_BASE),
 78                 .length         = SZ_4K,
 79                 .type           = MT_DEVICE,
 80         },
 81 #ifdef CONFIG_PCI
 82         {
 83                 .virtual        = PCIX_UNIT_BASE,
 84                 .pfn            = __phys_to_pfn(REALVIEW_PBX_PCI_BASE),
 85                 .length         = REALVIEW_PBX_PCI_BASE_SIZE,
 86                 .type           = MT_DEVICE,
 87         },
 88 #endif
 89 #ifdef CONFIG_DEBUG_LL
 90         {
 91                 .virtual        = IO_ADDRESS(REALVIEW_PBX_UART0_BASE),
 92                 .pfn            = __phys_to_pfn(REALVIEW_PBX_UART0_BASE),
 93                 .length         = SZ_4K,
 94                 .type           = MT_DEVICE,
 95         },
 96 #endif
 97 };
 98 
 99 static struct map_desc realview_local_io_desc[] __initdata = {
100         {
101                 .virtual        = IO_ADDRESS(REALVIEW_PBX_TILE_SCU_BASE),
102                 .pfn            = __phys_to_pfn(REALVIEW_PBX_TILE_SCU_BASE),
103                 .length         = SZ_4K,
104                 .type           = MT_DEVICE,
105         }, {
106                 .virtual        = IO_ADDRESS(REALVIEW_PBX_TILE_GIC_DIST_BASE),
107                 .pfn            = __phys_to_pfn(REALVIEW_PBX_TILE_GIC_DIST_BASE),
108                 .length         = SZ_4K,
109                 .type           = MT_DEVICE,
110         }, {
111                 .virtual        = IO_ADDRESS(REALVIEW_PBX_TILE_L220_BASE),
112                 .pfn            = __phys_to_pfn(REALVIEW_PBX_TILE_L220_BASE),
113                 .length         = SZ_8K,
114                 .type           = MT_DEVICE,
115         }
116 };
117 
118 static void __init realview_pbx_map_io(void)
119 {
120         iotable_init(realview_pbx_io_desc, ARRAY_SIZE(realview_pbx_io_desc));
121         if (core_tile_pbx11mp() || core_tile_pbxa9mp())
122                 iotable_init(realview_local_io_desc, ARRAY_SIZE(realview_local_io_desc));
123 }
124 
125 static struct pl061_platform_data gpio0_plat_data = {
126         .gpio_base      = 0,
127 };
128 
129 static struct pl061_platform_data gpio1_plat_data = {
130         .gpio_base      = 8,
131 };
132 
133 static struct pl061_platform_data gpio2_plat_data = {
134         .gpio_base      = 16,
135 };
136 
137 static struct pl022_ssp_controller ssp0_plat_data = {
138         .bus_id = 0,
139         .enable_dma = 0,
140         .num_chipselect = 1,
141 };
142 
143 /*
144  * RealView PBXCore AMBA devices
145  */
146 
147 #define GPIO2_IRQ               { IRQ_PBX_GPIO2 }
148 #define GPIO3_IRQ               { IRQ_PBX_GPIO3 }
149 #define AACI_IRQ                { IRQ_PBX_AACI }
150 #define MMCI0_IRQ               { IRQ_PBX_MMCI0A, IRQ_PBX_MMCI0B }
151 #define KMI0_IRQ                { IRQ_PBX_KMI0 }
152 #define KMI1_IRQ                { IRQ_PBX_KMI1 }
153 #define PBX_SMC_IRQ             { }
154 #define MPMC_IRQ                { }
155 #define PBX_CLCD_IRQ            { IRQ_PBX_CLCD }
156 #define DMAC_IRQ                { IRQ_PBX_DMAC }
157 #define SCTL_IRQ                { }
158 #define PBX_WATCHDOG_IRQ        { IRQ_PBX_WATCHDOG }
159 #define PBX_GPIO0_IRQ           { IRQ_PBX_GPIO0 }
160 #define GPIO1_IRQ               { IRQ_PBX_GPIO1 }
161 #define PBX_RTC_IRQ             { IRQ_PBX_RTC }
162 #define SCI_IRQ                 { IRQ_PBX_SCI }
163 #define PBX_UART0_IRQ           { IRQ_PBX_UART0 }
164 #define PBX_UART1_IRQ           { IRQ_PBX_UART1 }
165 #define PBX_UART2_IRQ           { IRQ_PBX_UART2 }
166 #define PBX_UART3_IRQ           { IRQ_PBX_UART3 }
167 #define PBX_SSP_IRQ             { IRQ_PBX_SSP }
168 
169 /* FPGA Primecells */
170 APB_DEVICE(aaci,        "fpga:aaci",    AACI,           NULL);
171 APB_DEVICE(mmc0,        "fpga:mmc0",    MMCI0,          &realview_mmc0_plat_data);
172 APB_DEVICE(kmi0,        "fpga:kmi0",    KMI0,           NULL);
173 APB_DEVICE(kmi1,        "fpga:kmi1",    KMI1,           NULL);
174 APB_DEVICE(uart3,       "fpga:uart3",   PBX_UART3,      NULL);
175 
176 /* DevChip Primecells */
177 AHB_DEVICE(smc, "dev:smc",      PBX_SMC,        NULL);
178 AHB_DEVICE(sctl,        "dev:sctl",     SCTL,           NULL);
179 APB_DEVICE(wdog,        "dev:wdog",     PBX_WATCHDOG,   NULL);
180 APB_DEVICE(gpio0,       "dev:gpio0",    PBX_GPIO0,      &gpio0_plat_data);
181 APB_DEVICE(gpio1,       "dev:gpio1",    GPIO1,          &gpio1_plat_data);
182 APB_DEVICE(gpio2,       "dev:gpio2",    GPIO2,          &gpio2_plat_data);
183 APB_DEVICE(rtc,         "dev:rtc",      PBX_RTC,        NULL);
184 APB_DEVICE(sci0,        "dev:sci0",     SCI,            NULL);
185 APB_DEVICE(uart0,       "dev:uart0",    PBX_UART0,      NULL);
186 APB_DEVICE(uart1,       "dev:uart1",    PBX_UART1,      NULL);
187 APB_DEVICE(uart2,       "dev:uart2",    PBX_UART2,      NULL);
188 APB_DEVICE(ssp0,        "dev:ssp0",     PBX_SSP,        &ssp0_plat_data);
189 
190 /* Primecells on the NEC ISSP chip */
191 AHB_DEVICE(clcd,        "issp:clcd",    PBX_CLCD,       &clcd_plat_data);
192 AHB_DEVICE(dmac,        "issp:dmac",    DMAC,           NULL);
193 
194 static struct amba_device *amba_devs[] __initdata = {
195         &dmac_device,
196         &uart0_device,
197         &uart1_device,
198         &uart2_device,
199         &uart3_device,
200         &smc_device,
201         &clcd_device,
202         &sctl_device,
203         &wdog_device,
204         &gpio0_device,
205         &gpio1_device,
206         &gpio2_device,
207         &rtc_device,
208         &sci0_device,
209         &ssp0_device,
210         &aaci_device,
211         &mmc0_device,
212         &kmi0_device,
213         &kmi1_device,
214 };
215 
216 /*
217  * RealView PB-X platform devices
218  */
219 static struct resource realview_pbx_flash_resources[] = {
220         [0] = {
221                 .start          = REALVIEW_PBX_FLASH0_BASE,
222                 .end            = REALVIEW_PBX_FLASH0_BASE + REALVIEW_PBX_FLASH0_SIZE - 1,
223                 .flags          = IORESOURCE_MEM,
224         },
225         [1] = {
226                 .start          = REALVIEW_PBX_FLASH1_BASE,
227                 .end            = REALVIEW_PBX_FLASH1_BASE + REALVIEW_PBX_FLASH1_SIZE - 1,
228                 .flags          = IORESOURCE_MEM,
229         },
230 };
231 
232 static struct resource realview_pbx_smsc911x_resources[] = {
233         [0] = {
234                 .start          = REALVIEW_PBX_ETH_BASE,
235                 .end            = REALVIEW_PBX_ETH_BASE + SZ_64K - 1,
236                 .flags          = IORESOURCE_MEM,
237         },
238         [1] = {
239                 .start          = IRQ_PBX_ETH,
240                 .end            = IRQ_PBX_ETH,
241                 .flags          = IORESOURCE_IRQ,
242         },
243 };
244 
245 static struct resource realview_pbx_isp1761_resources[] = {
246         [0] = {
247                 .start          = REALVIEW_PBX_USB_BASE,
248                 .end            = REALVIEW_PBX_USB_BASE + SZ_128K - 1,
249                 .flags          = IORESOURCE_MEM,
250         },
251         [1] = {
252                 .start          = IRQ_PBX_USB,
253                 .end            = IRQ_PBX_USB,
254                 .flags          = IORESOURCE_IRQ,
255         },
256 };
257 
258 static struct resource pmu_resources[] = {
259         [0] = {
260                 .start          = IRQ_PBX_PMU_CPU0,
261                 .end            = IRQ_PBX_PMU_CPU0,
262                 .flags          = IORESOURCE_IRQ,
263         },
264         [1] = {
265                 .start          = IRQ_PBX_PMU_CPU1,
266                 .end            = IRQ_PBX_PMU_CPU1,
267                 .flags          = IORESOURCE_IRQ,
268         },
269         [2] = {
270                 .start          = IRQ_PBX_PMU_CPU2,
271                 .end            = IRQ_PBX_PMU_CPU2,
272                 .flags          = IORESOURCE_IRQ,
273         },
274         [3] = {
275                 .start          = IRQ_PBX_PMU_CPU3,
276                 .end            = IRQ_PBX_PMU_CPU3,
277                 .flags          = IORESOURCE_IRQ,
278         },
279 };
280 
281 static struct platform_device pmu_device = {
282         .name                   = "arm-pmu",
283         .id                     = -1,
284         .num_resources          = ARRAY_SIZE(pmu_resources),
285         .resource               = pmu_resources,
286 };
287 
288 static void __init gic_init_irq(void)
289 {
290         /* ARM PBX on-board GIC */
291         if (core_tile_pbx11mp() || core_tile_pbxa9mp()) {
292                 gic_init(0, 29, __io_address(REALVIEW_PBX_TILE_GIC_DIST_BASE),
293                          __io_address(REALVIEW_PBX_TILE_GIC_CPU_BASE));
294         } else {
295                 gic_init(0, IRQ_PBX_GIC_START,
296                          __io_address(REALVIEW_PBX_GIC_DIST_BASE),
297                          __io_address(REALVIEW_PBX_GIC_CPU_BASE));
298         }
299 }
300 
301 #ifdef CONFIG_HAVE_ARM_TWD
302 static DEFINE_TWD_LOCAL_TIMER(twd_local_timer,
303                               REALVIEW_PBX_TILE_TWD_BASE,
304                               IRQ_LOCALTIMER);
305 
306 static void __init realview_pbx_twd_init(void)
307 {
308         int err = twd_local_timer_register(&twd_local_timer);
309         if (err)
310                 pr_err("twd_local_timer_register failed %d\n", err);
311 }
312 #else
313 #define realview_pbx_twd_init() do { } while(0)
314 #endif
315 
316 static void __init realview_pbx_timer_init(void)
317 {
318         timer0_va_base = __io_address(REALVIEW_PBX_TIMER0_1_BASE);
319         timer1_va_base = __io_address(REALVIEW_PBX_TIMER0_1_BASE) + 0x20;
320         timer2_va_base = __io_address(REALVIEW_PBX_TIMER2_3_BASE);
321         timer3_va_base = __io_address(REALVIEW_PBX_TIMER2_3_BASE) + 0x20;
322 
323         realview_clk_init(__io_address(REALVIEW_SYS_BASE), false);
324         realview_timer_init(IRQ_PBX_TIMER0_1);
325         realview_pbx_twd_init();
326 }
327 
328 static void realview_pbx_fixup(struct tag *tags, char **from,
329                                struct meminfo *meminfo)
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         meminfo->bank[0].start = 0;
337         meminfo->bank[0].size = SZ_256M;
338         meminfo->bank[1].start = 0x20000000;
339         meminfo->bank[1].size = SZ_512M;
340         meminfo->bank[2].start = 0x80000000;
341         meminfo->bank[2].size = SZ_256M;
342         meminfo->nr_banks = 3;
343 #else
344         realview_fixup(tags, from, meminfo);
345 #endif
346 }
347 
348 static void realview_pbx_restart(enum reboot_mode mode, const char *cmd)
349 {
350         void __iomem *reset_ctrl = __io_address(REALVIEW_SYS_RESETCTL);
351         void __iomem *lock_ctrl = __io_address(REALVIEW_SYS_LOCK);
352 
353         /*
354          * To reset, we hit the on-board reset register
355          * in the system FPGA
356          */
357         __raw_writel(REALVIEW_SYS_LOCK_VAL, lock_ctrl);
358         __raw_writel(0x00F0, reset_ctrl);
359         __raw_writel(0x00F4, reset_ctrl);
360         dsb();
361 }
362 
363 static void __init realview_pbx_init(void)
364 {
365         int i;
366 
367 #ifdef CONFIG_CACHE_L2X0
368         if (core_tile_pbxa9mp()) {
369                 void __iomem *l2x0_base =
370                         __io_address(REALVIEW_PBX_TILE_L220_BASE);
371 
372                 /* set RAM latencies to 1 cycle for eASIC */
373                 writel(0, l2x0_base + L2X0_TAG_LATENCY_CTRL);
374                 writel(0, l2x0_base + L2X0_DATA_LATENCY_CTRL);
375 
376                 /* 16KB way size, 8-way associativity, parity disabled
377                  * Bits:  .. 0 0 0 0 1 00 1 0 1 001 0 000 0 .... .... .... */
378                 l2x0_init(l2x0_base, 0x02520000, 0xc0000fff);
379                 platform_device_register(&pmu_device);
380         }
381 #endif
382 
383         realview_flash_register(realview_pbx_flash_resources,
384                                 ARRAY_SIZE(realview_pbx_flash_resources));
385         realview_eth_register(NULL, realview_pbx_smsc911x_resources);
386         platform_device_register(&realview_i2c_device);
387         platform_device_register(&realview_cf_device);
388         realview_usb_register(realview_pbx_isp1761_resources);
389 
390         for (i = 0; i < ARRAY_SIZE(amba_devs); i++) {
391                 struct amba_device *d = amba_devs[i];
392                 amba_device_register(d, &iomem_resource);
393         }
394 }
395 
396 MACHINE_START(REALVIEW_PBX, "ARM-RealView PBX")
397         /* Maintainer: ARM Ltd/Deep Blue Solutions Ltd */
398         .atag_offset    = 0x100,
399         .smp            = smp_ops(realview_smp_ops),
400         .fixup          = realview_pbx_fixup,
401         .map_io         = realview_pbx_map_io,
402         .init_early     = realview_init_early,
403         .init_irq       = gic_init_irq,
404         .init_time      = realview_pbx_timer_init,
405         .init_machine   = realview_pbx_init,
406 #ifdef CONFIG_ZONE_DMA
407         .dma_zone_size  = SZ_256M,
408 #endif
409         .restart        = realview_pbx_restart,
410 MACHINE_END
411 

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