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Linux/arch/arm/mach-realview/realview_pba8.c

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  1 /*
  2  *  linux/arch/arm/mach-realview/realview_pba8.c
  3  *
  4  *  Copyright (C) 2008 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/device.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 #include <linux/irqchip/arm-gic.h>
 31 #include <linux/platform_data/clk-realview.h>
 32 #include <linux/reboot.h>
 33 
 34 #include <asm/irq.h>
 35 #include <asm/mach-types.h>
 36 #include <asm/pgtable.h>
 37 
 38 #include <asm/mach/arch.h>
 39 #include <asm/mach/map.h>
 40 #include <asm/mach/time.h>
 41 
 42 #include "hardware.h"
 43 #include "board-pba8.h"
 44 #include "irqs-pba8.h"
 45 
 46 #include "core.h"
 47 
 48 static struct map_desc realview_pba8_io_desc[] __initdata = {
 49         {
 50                 .virtual        = IO_ADDRESS(REALVIEW_SYS_BASE),
 51                 .pfn            = __phys_to_pfn(REALVIEW_SYS_BASE),
 52                 .length         = SZ_4K,
 53                 .type           = MT_DEVICE,
 54         }, {
 55                 .virtual        = IO_ADDRESS(REALVIEW_PBA8_GIC_CPU_BASE),
 56                 .pfn            = __phys_to_pfn(REALVIEW_PBA8_GIC_CPU_BASE),
 57                 .length         = SZ_4K,
 58                 .type           = MT_DEVICE,
 59         }, {
 60                 .virtual        = IO_ADDRESS(REALVIEW_PBA8_GIC_DIST_BASE),
 61                 .pfn            = __phys_to_pfn(REALVIEW_PBA8_GIC_DIST_BASE),
 62                 .length         = SZ_4K,
 63                 .type           = MT_DEVICE,
 64         }, {
 65                 .virtual        = IO_ADDRESS(REALVIEW_SCTL_BASE),
 66                 .pfn            = __phys_to_pfn(REALVIEW_SCTL_BASE),
 67                 .length         = SZ_4K,
 68                 .type           = MT_DEVICE,
 69         }, {
 70                 .virtual        = IO_ADDRESS(REALVIEW_PBA8_TIMER0_1_BASE),
 71                 .pfn            = __phys_to_pfn(REALVIEW_PBA8_TIMER0_1_BASE),
 72                 .length         = SZ_4K,
 73                 .type           = MT_DEVICE,
 74         }, {
 75                 .virtual        = IO_ADDRESS(REALVIEW_PBA8_TIMER2_3_BASE),
 76                 .pfn            = __phys_to_pfn(REALVIEW_PBA8_TIMER2_3_BASE),
 77                 .length         = SZ_4K,
 78                 .type           = MT_DEVICE,
 79         },
 80 #ifdef CONFIG_DEBUG_LL
 81         {
 82                 .virtual        = IO_ADDRESS(REALVIEW_PBA8_UART0_BASE),
 83                 .pfn            = __phys_to_pfn(REALVIEW_PBA8_UART0_BASE),
 84                 .length         = SZ_4K,
 85                 .type           = MT_DEVICE,
 86         },
 87 #endif
 88 };
 89 
 90 static void __init realview_pba8_map_io(void)
 91 {
 92         iotable_init(realview_pba8_io_desc, ARRAY_SIZE(realview_pba8_io_desc));
 93 }
 94 
 95 static struct pl061_platform_data gpio0_plat_data = {
 96         .gpio_base      = 0,
 97 };
 98 
 99 static struct pl061_platform_data gpio1_plat_data = {
100         .gpio_base      = 8,
101 };
102 
103 static struct pl061_platform_data gpio2_plat_data = {
104         .gpio_base      = 16,
105 };
106 
107 static struct pl022_ssp_controller ssp0_plat_data = {
108         .bus_id = 0,
109         .enable_dma = 0,
110         .num_chipselect = 1,
111 };
112 
113 /*
114  * RealView PBA8Core AMBA devices
115  */
116 
117 #define GPIO2_IRQ               { IRQ_PBA8_GPIO2 }
118 #define GPIO3_IRQ               { IRQ_PBA8_GPIO3 }
119 #define AACI_IRQ                { IRQ_PBA8_AACI }
120 #define MMCI0_IRQ               { IRQ_PBA8_MMCI0A, IRQ_PBA8_MMCI0B }
121 #define KMI0_IRQ                { IRQ_PBA8_KMI0 }
122 #define KMI1_IRQ                { IRQ_PBA8_KMI1 }
123 #define PBA8_SMC_IRQ            { }
124 #define MPMC_IRQ                { }
125 #define PBA8_CLCD_IRQ           { IRQ_PBA8_CLCD }
126 #define DMAC_IRQ                { IRQ_PBA8_DMAC }
127 #define SCTL_IRQ                { }
128 #define PBA8_WATCHDOG_IRQ       { IRQ_PBA8_WATCHDOG }
129 #define PBA8_GPIO0_IRQ          { IRQ_PBA8_GPIO0 }
130 #define GPIO1_IRQ               { IRQ_PBA8_GPIO1 }
131 #define PBA8_RTC_IRQ            { IRQ_PBA8_RTC }
132 #define SCI_IRQ                 { IRQ_PBA8_SCI }
133 #define PBA8_UART0_IRQ          { IRQ_PBA8_UART0 }
134 #define PBA8_UART1_IRQ          { IRQ_PBA8_UART1 }
135 #define PBA8_UART2_IRQ          { IRQ_PBA8_UART2 }
136 #define PBA8_UART3_IRQ          { IRQ_PBA8_UART3 }
137 #define PBA8_SSP_IRQ            { IRQ_PBA8_SSP }
138 
139 /* FPGA Primecells */
140 APB_DEVICE(aaci,        "fpga:aaci",    AACI,           NULL);
141 APB_DEVICE(mmc0,        "fpga:mmc0",    MMCI0,          &realview_mmc0_plat_data);
142 APB_DEVICE(kmi0,        "fpga:kmi0",    KMI0,           NULL);
143 APB_DEVICE(kmi1,        "fpga:kmi1",    KMI1,           NULL);
144 APB_DEVICE(uart3,       "fpga:uart3",   PBA8_UART3,     NULL);
145 
146 /* DevChip Primecells */
147 AHB_DEVICE(smc,         "dev:smc",      PBA8_SMC,       NULL);
148 AHB_DEVICE(sctl,        "dev:sctl",     SCTL,           NULL);
149 APB_DEVICE(wdog,        "dev:wdog",     PBA8_WATCHDOG, NULL);
150 APB_DEVICE(gpio0,       "dev:gpio0",    PBA8_GPIO0,     &gpio0_plat_data);
151 APB_DEVICE(gpio1,       "dev:gpio1",    GPIO1,          &gpio1_plat_data);
152 APB_DEVICE(gpio2,       "dev:gpio2",    GPIO2,          &gpio2_plat_data);
153 APB_DEVICE(rtc,         "dev:rtc",      PBA8_RTC,       NULL);
154 APB_DEVICE(sci0,        "dev:sci0",     SCI,            NULL);
155 APB_DEVICE(uart0,       "dev:uart0",    PBA8_UART0,     NULL);
156 APB_DEVICE(uart1,       "dev:uart1",    PBA8_UART1,     NULL);
157 APB_DEVICE(uart2,       "dev:uart2",    PBA8_UART2,     NULL);
158 APB_DEVICE(ssp0,        "dev:ssp0",     PBA8_SSP,       &ssp0_plat_data);
159 
160 /* Primecells on the NEC ISSP chip */
161 AHB_DEVICE(clcd,        "issp:clcd",    PBA8_CLCD,      &clcd_plat_data);
162 AHB_DEVICE(dmac,        "issp:dmac",    DMAC,           NULL);
163 
164 static struct amba_device *amba_devs[] __initdata = {
165         &dmac_device,
166         &uart0_device,
167         &uart1_device,
168         &uart2_device,
169         &uart3_device,
170         &smc_device,
171         &clcd_device,
172         &sctl_device,
173         &wdog_device,
174         &gpio0_device,
175         &gpio1_device,
176         &gpio2_device,
177         &rtc_device,
178         &sci0_device,
179         &ssp0_device,
180         &aaci_device,
181         &mmc0_device,
182         &kmi0_device,
183         &kmi1_device,
184 };
185 
186 /*
187  * RealView PB-A8 platform devices
188  */
189 static struct resource realview_pba8_flash_resource[] = {
190         [0] = {
191                 .start          = REALVIEW_PBA8_FLASH0_BASE,
192                 .end            = REALVIEW_PBA8_FLASH0_BASE + REALVIEW_PBA8_FLASH0_SIZE - 1,
193                 .flags          = IORESOURCE_MEM,
194         },
195         [1] = {
196                 .start          = REALVIEW_PBA8_FLASH1_BASE,
197                 .end            = REALVIEW_PBA8_FLASH1_BASE + REALVIEW_PBA8_FLASH1_SIZE - 1,
198                 .flags          = IORESOURCE_MEM,
199         },
200 };
201 
202 static struct resource realview_pba8_smsc911x_resources[] = {
203         [0] = {
204                 .start          = REALVIEW_PBA8_ETH_BASE,
205                 .end            = REALVIEW_PBA8_ETH_BASE + SZ_64K - 1,
206                 .flags          = IORESOURCE_MEM,
207         },
208         [1] = {
209                 .start          = IRQ_PBA8_ETH,
210                 .end            = IRQ_PBA8_ETH,
211                 .flags          = IORESOURCE_IRQ,
212         },
213 };
214 
215 static struct resource realview_pba8_isp1761_resources[] = {
216         [0] = {
217                 .start          = REALVIEW_PBA8_USB_BASE,
218                 .end            = REALVIEW_PBA8_USB_BASE + SZ_128K - 1,
219                 .flags          = IORESOURCE_MEM,
220         },
221         [1] = {
222                 .start          = IRQ_PBA8_USB,
223                 .end            = IRQ_PBA8_USB,
224                 .flags          = IORESOURCE_IRQ,
225         },
226 };
227 
228 static struct resource pmu_resource = {
229         .start          = IRQ_PBA8_PMU,
230         .end            = IRQ_PBA8_PMU,
231         .flags          = IORESOURCE_IRQ,
232 };
233 
234 static struct platform_device pmu_device = {
235         .name                   = "armv7-pmu",
236         .id                     = -1,
237         .num_resources          = 1,
238         .resource               = &pmu_resource,
239 };
240 
241 static void __init gic_init_irq(void)
242 {
243         /* ARM PB-A8 on-board GIC */
244         gic_init(0, IRQ_PBA8_GIC_START,
245                  __io_address(REALVIEW_PBA8_GIC_DIST_BASE),
246                  __io_address(REALVIEW_PBA8_GIC_CPU_BASE));
247 }
248 
249 static void __init realview_pba8_timer_init(void)
250 {
251         timer0_va_base = __io_address(REALVIEW_PBA8_TIMER0_1_BASE);
252         timer1_va_base = __io_address(REALVIEW_PBA8_TIMER0_1_BASE) + 0x20;
253         timer2_va_base = __io_address(REALVIEW_PBA8_TIMER2_3_BASE);
254         timer3_va_base = __io_address(REALVIEW_PBA8_TIMER2_3_BASE) + 0x20;
255 
256         realview_clk_init(__io_address(REALVIEW_SYS_BASE), false);
257         realview_timer_init(IRQ_PBA8_TIMER0_1);
258 }
259 
260 static void realview_pba8_restart(enum reboot_mode mode, const char *cmd)
261 {
262         void __iomem *reset_ctrl = __io_address(REALVIEW_SYS_RESETCTL);
263         void __iomem *lock_ctrl = __io_address(REALVIEW_SYS_LOCK);
264 
265         /*
266          * To reset, we hit the on-board reset register
267          * in the system FPGA
268          */
269         __raw_writel(REALVIEW_SYS_LOCK_VAL, lock_ctrl);
270         __raw_writel(0x0000, reset_ctrl);
271         __raw_writel(0x0004, reset_ctrl);
272         dsb();
273 }
274 
275 static void __init realview_pba8_init(void)
276 {
277         int i;
278 
279         realview_flash_register(realview_pba8_flash_resource,
280                                 ARRAY_SIZE(realview_pba8_flash_resource));
281         realview_eth_register(NULL, realview_pba8_smsc911x_resources);
282         platform_device_register(&realview_i2c_device);
283         platform_device_register(&realview_cf_device);
284         platform_device_register(&realview_leds_device);
285         realview_usb_register(realview_pba8_isp1761_resources);
286         platform_device_register(&pmu_device);
287 
288         for (i = 0; i < ARRAY_SIZE(amba_devs); i++) {
289                 struct amba_device *d = amba_devs[i];
290                 amba_device_register(d, &iomem_resource);
291         }
292 }
293 
294 MACHINE_START(REALVIEW_PBA8, "ARM-RealView PB-A8")
295         /* Maintainer: ARM Ltd/Deep Blue Solutions Ltd */
296         .atag_offset    = 0x100,
297         .fixup          = realview_fixup,
298         .map_io         = realview_pba8_map_io,
299         .init_early     = realview_init_early,
300         .init_irq       = gic_init_irq,
301         .init_time      = realview_pba8_timer_init,
302         .init_machine   = realview_pba8_init,
303 #ifdef CONFIG_ZONE_DMA
304         .dma_zone_size  = SZ_256M,
305 #endif
306         .restart        = realview_pba8_restart,
307 MACHINE_END
308 

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