Merge tag 'for-linus' of git://linux-c6x.org/git/projects/linux-c6x-upstreaming
[pandora-kernel.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 #include <linux/mfd/abx500/ab8500.h>
20
21 #include <asm/mach/map.h>
22 #include <asm/pmu.h>
23 #include <plat/gpio-nomadik.h>
24 #include <mach/hardware.h>
25 #include <mach/setup.h>
26 #include <mach/devices.h>
27 #include <mach/usb.h>
28 #include <mach/db8500-regs.h>
29
30 #include "devices-db8500.h"
31 #include "ste-dma40-db8500.h"
32
33 /* minimum static i/o mapping required to boot U8500 platforms */
34 static struct map_desc u8500_uart_io_desc[] __initdata = {
35         __IO_DEV_DESC(U8500_UART0_BASE, SZ_4K),
36         __IO_DEV_DESC(U8500_UART2_BASE, SZ_4K),
37 };
38 /*  U8500 and U9540 common io_desc */
39 static struct map_desc u8500_common_io_desc[] __initdata = {
40         /* SCU base also covers GIC CPU BASE and TWD with its 4K page */
41         __IO_DEV_DESC(U8500_SCU_BASE, SZ_4K),
42         __IO_DEV_DESC(U8500_GIC_DIST_BASE, SZ_4K),
43         __IO_DEV_DESC(U8500_L2CC_BASE, SZ_4K),
44         __IO_DEV_DESC(U8500_MTU0_BASE, SZ_4K),
45         __IO_DEV_DESC(U8500_BACKUPRAM0_BASE, SZ_8K),
46
47         __IO_DEV_DESC(U8500_CLKRST1_BASE, SZ_4K),
48         __IO_DEV_DESC(U8500_CLKRST2_BASE, SZ_4K),
49         __IO_DEV_DESC(U8500_CLKRST3_BASE, SZ_4K),
50         __IO_DEV_DESC(U8500_CLKRST5_BASE, SZ_4K),
51         __IO_DEV_DESC(U8500_CLKRST6_BASE, SZ_4K),
52
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 };
58
59 /* U8500 IO map specific description */
60 static struct map_desc u8500_io_desc[] __initdata = {
61         __IO_DEV_DESC(U8500_PRCMU_BASE, SZ_4K),
62         __IO_DEV_DESC(U8500_PRCMU_TCDM_BASE, SZ_4K),
63
64 };
65
66 /* U9540 IO map specific description */
67 static struct map_desc u9540_io_desc[] __initdata = {
68         __IO_DEV_DESC(U8500_PRCMU_BASE, SZ_4K + SZ_8K),
69         __IO_DEV_DESC(U8500_PRCMU_TCDM_BASE, SZ_4K + SZ_8K),
70 };
71
72 void __init u8500_map_io(void)
73 {
74         /*
75          * Map the UARTs early so that the DEBUG_LL stuff continues to work.
76          */
77         iotable_init(u8500_uart_io_desc, ARRAY_SIZE(u8500_uart_io_desc));
78
79         ux500_map_io();
80
81         iotable_init(u8500_common_io_desc, ARRAY_SIZE(u8500_common_io_desc));
82
83         if (cpu_is_u9540())
84                 iotable_init(u9540_io_desc, ARRAY_SIZE(u9540_io_desc));
85         else
86                 iotable_init(u8500_io_desc, ARRAY_SIZE(u8500_io_desc));
87
88         _PRCMU_BASE = __io_address(U8500_PRCMU_BASE);
89 }
90
91 static struct resource db8500_pmu_resources[] = {
92         [0] = {
93                 .start          = IRQ_DB8500_PMU,
94                 .end            = IRQ_DB8500_PMU,
95                 .flags          = IORESOURCE_IRQ,
96         },
97 };
98
99 /*
100  * The PMU IRQ lines of two cores are wired together into a single interrupt.
101  * Bounce the interrupt to the other core if it's not ours.
102  */
103 static irqreturn_t db8500_pmu_handler(int irq, void *dev, irq_handler_t handler)
104 {
105         irqreturn_t ret = handler(irq, dev);
106         int other = !smp_processor_id();
107
108         if (ret == IRQ_NONE && cpu_online(other))
109                 irq_set_affinity(irq, cpumask_of(other));
110
111         /*
112          * We should be able to get away with the amount of IRQ_NONEs we give,
113          * while still having the spurious IRQ detection code kick in if the
114          * interrupt really starts hitting spuriously.
115          */
116         return ret;
117 }
118
119 struct arm_pmu_platdata db8500_pmu_platdata = {
120         .handle_irq             = db8500_pmu_handler,
121 };
122
123 static struct platform_device db8500_pmu_device = {
124         .name                   = "arm-pmu",
125         .id                     = ARM_PMU_DEVICE_CPU,
126         .num_resources          = ARRAY_SIZE(db8500_pmu_resources),
127         .resource               = db8500_pmu_resources,
128         .dev.platform_data      = &db8500_pmu_platdata,
129 };
130
131 static struct platform_device db8500_prcmu_device = {
132         .name                   = "db8500-prcmu",
133 };
134
135 static struct platform_device *platform_devs[] __initdata = {
136         &u8500_dma40_device,
137         &db8500_pmu_device,
138         &db8500_prcmu_device,
139 };
140
141 static struct platform_device *of_platform_devs[] __initdata = {
142         &u8500_dma40_device,
143 };
144
145 static resource_size_t __initdata db8500_gpio_base[] = {
146         U8500_GPIOBANK0_BASE,
147         U8500_GPIOBANK1_BASE,
148         U8500_GPIOBANK2_BASE,
149         U8500_GPIOBANK3_BASE,
150         U8500_GPIOBANK4_BASE,
151         U8500_GPIOBANK5_BASE,
152         U8500_GPIOBANK6_BASE,
153         U8500_GPIOBANK7_BASE,
154         U8500_GPIOBANK8_BASE,
155 };
156
157 static void __init db8500_add_gpios(struct device *parent)
158 {
159         struct nmk_gpio_platform_data pdata = {
160                 .supports_sleepmode = true,
161         };
162
163         dbx500_add_gpios(parent, ARRAY_AND_SIZE(db8500_gpio_base),
164                          IRQ_DB8500_GPIO0, &pdata);
165         dbx500_add_pinctrl(parent, "pinctrl-db8500");
166 }
167
168 static int usb_db8500_rx_dma_cfg[] = {
169         DB8500_DMA_DEV38_USB_OTG_IEP_1_9,
170         DB8500_DMA_DEV37_USB_OTG_IEP_2_10,
171         DB8500_DMA_DEV36_USB_OTG_IEP_3_11,
172         DB8500_DMA_DEV19_USB_OTG_IEP_4_12,
173         DB8500_DMA_DEV18_USB_OTG_IEP_5_13,
174         DB8500_DMA_DEV17_USB_OTG_IEP_6_14,
175         DB8500_DMA_DEV16_USB_OTG_IEP_7_15,
176         DB8500_DMA_DEV39_USB_OTG_IEP_8
177 };
178
179 static int usb_db8500_tx_dma_cfg[] = {
180         DB8500_DMA_DEV38_USB_OTG_OEP_1_9,
181         DB8500_DMA_DEV37_USB_OTG_OEP_2_10,
182         DB8500_DMA_DEV36_USB_OTG_OEP_3_11,
183         DB8500_DMA_DEV19_USB_OTG_OEP_4_12,
184         DB8500_DMA_DEV18_USB_OTG_OEP_5_13,
185         DB8500_DMA_DEV17_USB_OTG_OEP_6_14,
186         DB8500_DMA_DEV16_USB_OTG_OEP_7_15,
187         DB8500_DMA_DEV39_USB_OTG_OEP_8
188 };
189
190 static const char *db8500_read_soc_id(void)
191 {
192         void __iomem *uid = __io_address(U8500_BB_UID_BASE);
193
194         return kasprintf(GFP_KERNEL, "%08x%08x%08x%08x%08x",
195                          readl((u32 *)uid+1),
196                          readl((u32 *)uid+1), readl((u32 *)uid+2),
197                          readl((u32 *)uid+3), readl((u32 *)uid+4));
198 }
199
200 static struct device * __init db8500_soc_device_init(void)
201 {
202         const char *soc_id = db8500_read_soc_id();
203
204         return ux500_soc_device_init(soc_id);
205 }
206
207 /*
208  * This function is called from the board init
209  */
210 struct device * __init u8500_init_devices(struct ab8500_platform_data *ab8500)
211 {
212         struct device *parent;
213         int i;
214
215         parent = db8500_soc_device_init();
216
217         db8500_add_rtc(parent);
218         db8500_add_gpios(parent);
219         db8500_add_usb(parent, usb_db8500_rx_dma_cfg, usb_db8500_tx_dma_cfg);
220
221         platform_device_register_data(parent,
222                 "cpufreq-u8500", -1, NULL, 0);
223
224         for (i = 0; i < ARRAY_SIZE(platform_devs); i++)
225                 platform_devs[i]->dev.parent = parent;
226
227         db8500_prcmu_device.dev.platform_data = ab8500;
228
229         platform_add_devices(platform_devs, ARRAY_SIZE(platform_devs));
230
231         return parent;
232 }
233
234 /* TODO: Once all pieces are DT:ed, remove completely. */
235 struct device * __init u8500_of_init_devices(void)
236 {
237         struct device *parent;
238         int i;
239
240         parent = db8500_soc_device_init();
241
242         db8500_add_usb(parent, usb_db8500_rx_dma_cfg, usb_db8500_tx_dma_cfg);
243
244         platform_device_register_data(parent,
245                 "cpufreq-u8500", -1, NULL, 0);
246
247         for (i = 0; i < ARRAY_SIZE(of_platform_devs); i++)
248                 of_platform_devs[i]->dev.parent = parent;
249
250         /*
251          * Devices to be DT:ed:
252          *   u8500_dma40_device  = todo
253          *   db8500_pmu_device   = done
254          *   db8500_prcmu_device = done
255          */
256         platform_add_devices(of_platform_devs, ARRAY_SIZE(of_platform_devs));
257
258         return parent;
259 }