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ARM: ux500: Fork cpu-db8500 platform_devs for sequential DT enablement
[karo-tx-linux.git] / arch / arm / mach-ux500 / cpu-db8500.c
1 /*
2  * Copyright (C) 2008-2009 ST-Ericsson SA
3  *
4  * Author: Srinidhi KASAGAR <srinidhi.kasagar@stericsson.com>
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License version 2, as
8  * published by the Free Software Foundation.
9  *
10  */
11 #include <linux/types.h>
12 #include <linux/init.h>
13 #include <linux/device.h>
14 #include <linux/amba/bus.h>
15 #include <linux/interrupt.h>
16 #include <linux/irq.h>
17 #include <linux/platform_device.h>
18 #include <linux/io.h>
19
20 #include <asm/mach/map.h>
21 #include <asm/pmu.h>
22 #include <plat/gpio-nomadik.h>
23 #include <mach/hardware.h>
24 #include <mach/setup.h>
25 #include <mach/devices.h>
26 #include <mach/usb.h>
27 #include <mach/db8500-regs.h>
28
29 #include "devices-db8500.h"
30 #include "ste-dma40-db8500.h"
31
32 /* minimum static i/o mapping required to boot U8500 platforms */
33 static struct map_desc u8500_uart_io_desc[] __initdata = {
34         __IO_DEV_DESC(U8500_UART0_BASE, SZ_4K),
35         __IO_DEV_DESC(U8500_UART2_BASE, SZ_4K),
36 };
37
38 static struct map_desc u8500_io_desc[] __initdata = {
39         /* SCU base also covers GIC CPU BASE and TWD with its 4K page */
40         __IO_DEV_DESC(U8500_SCU_BASE, SZ_4K),
41         __IO_DEV_DESC(U8500_GIC_DIST_BASE, SZ_4K),
42         __IO_DEV_DESC(U8500_L2CC_BASE, SZ_4K),
43         __IO_DEV_DESC(U8500_MTU0_BASE, SZ_4K),
44         __IO_DEV_DESC(U8500_BACKUPRAM0_BASE, SZ_8K),
45
46         __IO_DEV_DESC(U8500_CLKRST1_BASE, SZ_4K),
47         __IO_DEV_DESC(U8500_CLKRST2_BASE, SZ_4K),
48         __IO_DEV_DESC(U8500_CLKRST3_BASE, SZ_4K),
49         __IO_DEV_DESC(U8500_CLKRST5_BASE, SZ_4K),
50         __IO_DEV_DESC(U8500_CLKRST6_BASE, SZ_4K),
51
52         __IO_DEV_DESC(U8500_PRCMU_BASE, SZ_4K),
53         __IO_DEV_DESC(U8500_GPIO0_BASE, SZ_4K),
54         __IO_DEV_DESC(U8500_GPIO1_BASE, SZ_4K),
55         __IO_DEV_DESC(U8500_GPIO2_BASE, SZ_4K),
56         __IO_DEV_DESC(U8500_GPIO3_BASE, SZ_4K),
57         __IO_DEV_DESC(U8500_PRCMU_TCDM_BASE, SZ_4K),
58 };
59
60 void __init u8500_map_io(void)
61 {
62         /*
63          * Map the UARTs early so that the DEBUG_LL stuff continues to work.
64          */
65         iotable_init(u8500_uart_io_desc, ARRAY_SIZE(u8500_uart_io_desc));
66
67         ux500_map_io();
68
69         iotable_init(u8500_io_desc, ARRAY_SIZE(u8500_io_desc));
70
71         _PRCMU_BASE = __io_address(U8500_PRCMU_BASE);
72 }
73
74 static struct resource db8500_pmu_resources[] = {
75         [0] = {
76                 .start          = IRQ_DB8500_PMU,
77                 .end            = IRQ_DB8500_PMU,
78                 .flags          = IORESOURCE_IRQ,
79         },
80 };
81
82 /*
83  * The PMU IRQ lines of two cores are wired together into a single interrupt.
84  * Bounce the interrupt to the other core if it's not ours.
85  */
86 static irqreturn_t db8500_pmu_handler(int irq, void *dev, irq_handler_t handler)
87 {
88         irqreturn_t ret = handler(irq, dev);
89         int other = !smp_processor_id();
90
91         if (ret == IRQ_NONE && cpu_online(other))
92                 irq_set_affinity(irq, cpumask_of(other));
93
94         /*
95          * We should be able to get away with the amount of IRQ_NONEs we give,
96          * while still having the spurious IRQ detection code kick in if the
97          * interrupt really starts hitting spuriously.
98          */
99         return ret;
100 }
101
102 static struct arm_pmu_platdata db8500_pmu_platdata = {
103         .handle_irq             = db8500_pmu_handler,
104 };
105
106 static struct platform_device db8500_pmu_device = {
107         .name                   = "arm-pmu",
108         .id                     = ARM_PMU_DEVICE_CPU,
109         .num_resources          = ARRAY_SIZE(db8500_pmu_resources),
110         .resource               = db8500_pmu_resources,
111         .dev.platform_data      = &db8500_pmu_platdata,
112 };
113
114 static struct platform_device db8500_prcmu_device = {
115         .name                   = "db8500-prcmu",
116 };
117
118 static struct platform_device *platform_devs[] __initdata = {
119         &u8500_dma40_device,
120         &db8500_pmu_device,
121         &db8500_prcmu_device,
122 };
123
124 static struct platform_device *of_platform_devs[] __initdata = {
125         &u8500_dma40_device,
126         &db8500_pmu_device,
127         &db8500_prcmu_device,
128 };
129
130 static resource_size_t __initdata db8500_gpio_base[] = {
131         U8500_GPIOBANK0_BASE,
132         U8500_GPIOBANK1_BASE,
133         U8500_GPIOBANK2_BASE,
134         U8500_GPIOBANK3_BASE,
135         U8500_GPIOBANK4_BASE,
136         U8500_GPIOBANK5_BASE,
137         U8500_GPIOBANK6_BASE,
138         U8500_GPIOBANK7_BASE,
139         U8500_GPIOBANK8_BASE,
140 };
141
142 static void __init db8500_add_gpios(struct device *parent)
143 {
144         struct nmk_gpio_platform_data pdata = {
145                 .supports_sleepmode = true,
146         };
147
148         dbx500_add_gpios(parent, ARRAY_AND_SIZE(db8500_gpio_base),
149                          IRQ_DB8500_GPIO0, &pdata);
150 }
151
152 static int usb_db8500_rx_dma_cfg[] = {
153         DB8500_DMA_DEV38_USB_OTG_IEP_1_9,
154         DB8500_DMA_DEV37_USB_OTG_IEP_2_10,
155         DB8500_DMA_DEV36_USB_OTG_IEP_3_11,
156         DB8500_DMA_DEV19_USB_OTG_IEP_4_12,
157         DB8500_DMA_DEV18_USB_OTG_IEP_5_13,
158         DB8500_DMA_DEV17_USB_OTG_IEP_6_14,
159         DB8500_DMA_DEV16_USB_OTG_IEP_7_15,
160         DB8500_DMA_DEV39_USB_OTG_IEP_8
161 };
162
163 static int usb_db8500_tx_dma_cfg[] = {
164         DB8500_DMA_DEV38_USB_OTG_OEP_1_9,
165         DB8500_DMA_DEV37_USB_OTG_OEP_2_10,
166         DB8500_DMA_DEV36_USB_OTG_OEP_3_11,
167         DB8500_DMA_DEV19_USB_OTG_OEP_4_12,
168         DB8500_DMA_DEV18_USB_OTG_OEP_5_13,
169         DB8500_DMA_DEV17_USB_OTG_OEP_6_14,
170         DB8500_DMA_DEV16_USB_OTG_OEP_7_15,
171         DB8500_DMA_DEV39_USB_OTG_OEP_8
172 };
173
174 static const char *db8500_read_soc_id(void)
175 {
176         void __iomem *uid = __io_address(U8500_BB_UID_BASE);
177
178         return kasprintf(GFP_KERNEL, "%08x%08x%08x%08x%08x",
179                          readl((u32 *)uid+1),
180                          readl((u32 *)uid+1), readl((u32 *)uid+2),
181                          readl((u32 *)uid+3), readl((u32 *)uid+4));
182 }
183
184 static struct device * __init db8500_soc_device_init(void)
185 {
186         const char *soc_id = db8500_read_soc_id();
187
188         return ux500_soc_device_init(soc_id);
189 }
190
191 /*
192  * This function is called from the board init
193  */
194 struct device * __init u8500_init_devices(void)
195 {
196         struct device *parent;
197         int i;
198
199         parent = db8500_soc_device_init();
200
201         db8500_add_rtc(parent);
202         db8500_add_gpios(parent);
203         db8500_add_usb(parent, usb_db8500_rx_dma_cfg, usb_db8500_tx_dma_cfg);
204
205         platform_device_register_data(parent,
206                 "cpufreq-u8500", -1, NULL, 0);
207
208         for (i = 0; i < ARRAY_SIZE(of_platform_devs); i++)
209                 of_platform_devs[i]->dev.parent = parent;
210
211         /*
212          * Devices to be DT:ed:
213          *   u8500_dma40_device  = todo
214          *   db8500_pmu_device   = todo
215          *   db8500_prcmu_device = todo
216          */
217         platform_add_devices(of_platform_devs, ARRAY_SIZE(of_platform_devs));
218
219         return parent;
220 }