2 * Copyright (C) 2008-2009 ST-Ericsson SA
4 * Author: Srinidhi KASAGAR <srinidhi.kasagar@stericsson.com>
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.
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>
19 #include <linux/mfd/abx500/ab8500.h>
20 #include <linux/mfd/dbx500-prcmu.h>
22 #include <linux/of_platform.h>
23 #include <linux/regulator/machine.h>
24 #include <linux/random.h>
27 #include <asm/mach/map.h>
31 #include "board-mop500-regulators.h"
32 #include "board-mop500.h"
33 #include "db8500-regs.h"
36 struct ab8500_platform_data ab8500_platdata
= {
37 .regulator
= &ab8500_regulator_plat_data
,
40 struct prcmu_pdata db8500_prcmu_pdata
= {
41 .ab_platdata
= &ab8500_platdata
,
42 .version_offset
= DB8500_PRCMU_FW_VERSION_OFFSET
,
43 .legacy_offset
= DB8500_PRCMU_LEGACY_OFFSET
,
46 /* minimum static i/o mapping required to boot U8500 platforms */
47 static struct map_desc u8500_uart_io_desc
[] __initdata
= {
48 __IO_DEV_DESC(U8500_UART0_BASE
, SZ_4K
),
49 __IO_DEV_DESC(U8500_UART2_BASE
, SZ_4K
),
51 /* U8500 and U9540 common io_desc */
52 static struct map_desc u8500_common_io_desc
[] __initdata
= {
53 /* SCU base also covers GIC CPU BASE and TWD with its 4K page */
54 __IO_DEV_DESC(U8500_SCU_BASE
, SZ_4K
),
55 __IO_DEV_DESC(U8500_GIC_DIST_BASE
, SZ_4K
),
56 __IO_DEV_DESC(U8500_L2CC_BASE
, SZ_4K
),
57 __IO_DEV_DESC(U8500_MTU0_BASE
, SZ_4K
),
58 __IO_DEV_DESC(U8500_BACKUPRAM0_BASE
, SZ_8K
),
60 __IO_DEV_DESC(U8500_CLKRST1_BASE
, SZ_4K
),
61 __IO_DEV_DESC(U8500_CLKRST2_BASE
, SZ_4K
),
62 __IO_DEV_DESC(U8500_CLKRST3_BASE
, SZ_4K
),
63 __IO_DEV_DESC(U8500_CLKRST5_BASE
, SZ_4K
),
64 __IO_DEV_DESC(U8500_CLKRST6_BASE
, SZ_4K
),
66 __IO_DEV_DESC(U8500_GPIO0_BASE
, SZ_4K
),
67 __IO_DEV_DESC(U8500_GPIO1_BASE
, SZ_4K
),
68 __IO_DEV_DESC(U8500_GPIO2_BASE
, SZ_4K
),
69 __IO_DEV_DESC(U8500_GPIO3_BASE
, SZ_4K
),
72 /* U8500 IO map specific description */
73 static struct map_desc u8500_io_desc
[] __initdata
= {
74 __IO_DEV_DESC(U8500_PRCMU_BASE
, SZ_4K
),
75 __IO_DEV_DESC(U8500_PRCMU_TCDM_BASE
, SZ_4K
),
79 /* U9540 IO map specific description */
80 static struct map_desc u9540_io_desc
[] __initdata
= {
81 __IO_DEV_DESC(U8500_PRCMU_BASE
, SZ_4K
+ SZ_8K
),
82 __IO_DEV_DESC(U8500_PRCMU_TCDM_BASE
, SZ_4K
+ SZ_8K
),
85 void __init
u8500_map_io(void)
88 * Map the UARTs early so that the DEBUG_LL stuff continues to work.
90 iotable_init(u8500_uart_io_desc
, ARRAY_SIZE(u8500_uart_io_desc
));
94 iotable_init(u8500_common_io_desc
, ARRAY_SIZE(u8500_common_io_desc
));
96 if (cpu_is_ux540_family())
97 iotable_init(u9540_io_desc
, ARRAY_SIZE(u9540_io_desc
));
99 iotable_init(u8500_io_desc
, ARRAY_SIZE(u8500_io_desc
));
103 * The PMU IRQ lines of two cores are wired together into a single interrupt.
104 * Bounce the interrupt to the other core if it's not ours.
106 static irqreturn_t
db8500_pmu_handler(int irq
, void *dev
, irq_handler_t handler
)
108 irqreturn_t ret
= handler(irq
, dev
);
109 int other
= !smp_processor_id();
111 if (ret
== IRQ_NONE
&& cpu_online(other
))
112 irq_set_affinity(irq
, cpumask_of(other
));
115 * We should be able to get away with the amount of IRQ_NONEs we give,
116 * while still having the spurious IRQ detection code kick in if the
117 * interrupt really starts hitting spuriously.
122 struct arm_pmu_platdata db8500_pmu_platdata
= {
123 .handle_irq
= db8500_pmu_handler
,
126 static const char *db8500_read_soc_id(void)
128 void __iomem
*uid
= __io_address(U8500_BB_UID_BASE
);
130 /* Throw these device-specific numbers into the entropy pool */
131 add_device_randomness(uid
, 0x14);
132 return kasprintf(GFP_KERNEL
, "%08x%08x%08x%08x%08x",
134 readl((u32
*)uid
+1), readl((u32
*)uid
+2),
135 readl((u32
*)uid
+3), readl((u32
*)uid
+4));
138 static struct device
* __init
db8500_soc_device_init(void)
140 const char *soc_id
= db8500_read_soc_id();
142 return ux500_soc_device_init(soc_id
);
145 static struct of_dev_auxdata u8500_auxdata_lookup
[] __initdata
= {
146 /* Requires call-back bindings. */
147 OF_DEV_AUXDATA("arm,cortex-a9-pmu", 0, "arm-pmu", &db8500_pmu_platdata
),
148 /* Requires DMA bindings. */
149 OF_DEV_AUXDATA("stericsson,ux500-msp-i2s", 0x80123000,
150 "ux500-msp-i2s.0", &msp0_platform_data
),
151 OF_DEV_AUXDATA("stericsson,ux500-msp-i2s", 0x80124000,
152 "ux500-msp-i2s.1", &msp1_platform_data
),
153 OF_DEV_AUXDATA("stericsson,ux500-msp-i2s", 0x80117000,
154 "ux500-msp-i2s.2", &msp2_platform_data
),
155 OF_DEV_AUXDATA("stericsson,ux500-msp-i2s", 0x80125000,
156 "ux500-msp-i2s.3", &msp3_platform_data
),
157 /* Requires non-DT:able platform data. */
158 OF_DEV_AUXDATA("stericsson,db8500-prcmu", 0x80157000, "db8500-prcmu",
159 &db8500_prcmu_pdata
),
160 OF_DEV_AUXDATA("stericsson,ux500-cryp", 0xa03cb000, "cryp1", NULL
),
161 OF_DEV_AUXDATA("stericsson,ux500-hash", 0xa03c2000, "hash1", NULL
),
162 OF_DEV_AUXDATA("stericsson,snd-soc-mop500", 0, "snd-soc-mop500.0",
167 static struct of_dev_auxdata u8540_auxdata_lookup
[] __initdata
= {
168 OF_DEV_AUXDATA("stericsson,db8500-prcmu", 0x80157000, "db8500-prcmu",
169 &db8500_prcmu_pdata
),
173 static const struct of_device_id u8500_local_bus_nodes
[] = {
174 /* only create devices below soc node */
175 { .compatible
= "stericsson,db8500", },
176 { .compatible
= "stericsson,db8500-prcmu", },
177 { .compatible
= "simple-bus"},
181 static void __init
u8500_init_machine(void)
183 struct device
*parent
= db8500_soc_device_init();
185 /* automatically probe child nodes of dbx5x0 devices */
186 if (of_machine_is_compatible("st-ericsson,u8540"))
187 of_platform_populate(NULL
, u8500_local_bus_nodes
,
188 u8540_auxdata_lookup
, parent
);
190 of_platform_populate(NULL
, u8500_local_bus_nodes
,
191 u8500_auxdata_lookup
, parent
);
194 static const char * stericsson_dt_platform_compat
[] = {
202 DT_MACHINE_START(U8500_DT
, "ST-Ericsson Ux5x0 platform (Device Tree Support)")
203 .smp
= smp_ops(ux500_smp_ops
),
204 .map_io
= u8500_map_io
,
205 .init_irq
= ux500_init_irq
,
206 /* we re-use nomadik timer here */
207 .init_time
= ux500_timer_init
,
208 .init_machine
= u8500_init_machine
,
210 .dt_compat
= stericsson_dt_platform_compat
,
211 .restart
= ux500_restart
,