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 static struct ab8500_platform_data ab8500_platdata = {
37 .regulator = &ab8500_regulator_plat_data,
40 static 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 /* U8500 and U9540 common io_desc */
47 static struct map_desc u8500_common_io_desc[] __initdata = {
48 /* SCU base also covers GIC CPU BASE and TWD with its 4K page */
49 __IO_DEV_DESC(U8500_SCU_BASE, SZ_4K),
50 __IO_DEV_DESC(U8500_GIC_DIST_BASE, SZ_4K),
51 __IO_DEV_DESC(U8500_L2CC_BASE, SZ_4K),
52 __IO_DEV_DESC(U8500_BACKUPRAM0_BASE, SZ_8K),
55 /* U8500 IO map specific description */
56 static struct map_desc u8500_io_desc[] __initdata = {
57 __IO_DEV_DESC(U8500_PRCMU_BASE, SZ_4K),
58 __IO_DEV_DESC(U8500_PRCMU_TCDM_BASE, SZ_4K),
62 /* U9540 IO map specific description */
63 static struct map_desc u9540_io_desc[] __initdata = {
64 __IO_DEV_DESC(U8500_PRCMU_BASE, SZ_4K + SZ_8K),
65 __IO_DEV_DESC(U8500_PRCMU_TCDM_BASE, SZ_4K + SZ_8K),
68 static void __init u8500_map_io(void)
73 iotable_init(u8500_common_io_desc, ARRAY_SIZE(u8500_common_io_desc));
75 if (cpu_is_ux540_family())
76 iotable_init(u9540_io_desc, ARRAY_SIZE(u9540_io_desc));
78 iotable_init(u8500_io_desc, ARRAY_SIZE(u8500_io_desc));
82 * The PMU IRQ lines of two cores are wired together into a single interrupt.
83 * Bounce the interrupt to the other core if it's not ours.
85 static irqreturn_t db8500_pmu_handler(int irq, void *dev, irq_handler_t handler)
87 irqreturn_t ret = handler(irq, dev);
88 int other = !smp_processor_id();
90 if (ret == IRQ_NONE && cpu_online(other))
91 irq_set_affinity(irq, cpumask_of(other));
94 * We should be able to get away with the amount of IRQ_NONEs we give,
95 * while still having the spurious IRQ detection code kick in if the
96 * interrupt really starts hitting spuriously.
101 static struct arm_pmu_platdata db8500_pmu_platdata = {
102 .handle_irq = db8500_pmu_handler,
105 static const char *db8500_read_soc_id(void)
107 void __iomem *uid = __io_address(U8500_BB_UID_BASE);
109 /* Throw these device-specific numbers into the entropy pool */
110 add_device_randomness(uid, 0x14);
111 return kasprintf(GFP_KERNEL, "%08x%08x%08x%08x%08x",
113 readl((u32 *)uid+1), readl((u32 *)uid+2),
114 readl((u32 *)uid+3), readl((u32 *)uid+4));
117 static struct device * __init db8500_soc_device_init(void)
119 const char *soc_id = db8500_read_soc_id();
121 return ux500_soc_device_init(soc_id);
124 static struct of_dev_auxdata u8500_auxdata_lookup[] __initdata = {
125 /* Requires call-back bindings. */
126 OF_DEV_AUXDATA("arm,cortex-a9-pmu", 0, "arm-pmu", &db8500_pmu_platdata),
127 /* Requires DMA bindings. */
128 OF_DEV_AUXDATA("stericsson,ux500-msp-i2s", 0x80123000,
129 "ux500-msp-i2s.0", &msp0_platform_data),
130 OF_DEV_AUXDATA("stericsson,ux500-msp-i2s", 0x80124000,
131 "ux500-msp-i2s.1", &msp1_platform_data),
132 OF_DEV_AUXDATA("stericsson,ux500-msp-i2s", 0x80117000,
133 "ux500-msp-i2s.2", &msp2_platform_data),
134 OF_DEV_AUXDATA("stericsson,ux500-msp-i2s", 0x80125000,
135 "ux500-msp-i2s.3", &msp3_platform_data),
136 /* Requires non-DT:able platform data. */
137 OF_DEV_AUXDATA("stericsson,db8500-prcmu", 0x80157000, "db8500-prcmu",
138 &db8500_prcmu_pdata),
139 OF_DEV_AUXDATA("stericsson,ux500-cryp", 0xa03cb000, "cryp1", NULL),
140 OF_DEV_AUXDATA("stericsson,ux500-hash", 0xa03c2000, "hash1", NULL),
141 OF_DEV_AUXDATA("stericsson,snd-soc-mop500", 0, "snd-soc-mop500.0",
146 static struct of_dev_auxdata u8540_auxdata_lookup[] __initdata = {
147 OF_DEV_AUXDATA("stericsson,db8500-prcmu", 0x80157000, "db8500-prcmu",
148 &db8500_prcmu_pdata),
152 static const struct of_device_id u8500_local_bus_nodes[] = {
153 /* only create devices below soc node */
154 { .compatible = "stericsson,db8500", },
155 { .compatible = "stericsson,db8500-prcmu", },
156 { .compatible = "simple-bus"},
160 static void __init u8500_init_machine(void)
162 struct device *parent = db8500_soc_device_init();
164 /* automatically probe child nodes of dbx5x0 devices */
165 if (of_machine_is_compatible("st-ericsson,u8540"))
166 of_platform_populate(NULL, u8500_local_bus_nodes,
167 u8540_auxdata_lookup, parent);
169 of_platform_populate(NULL, u8500_local_bus_nodes,
170 u8500_auxdata_lookup, parent);
173 static const char * stericsson_dt_platform_compat[] = {
181 DT_MACHINE_START(U8500_DT, "ST-Ericsson Ux5x0 platform (Device Tree Support)")
182 .smp = smp_ops(ux500_smp_ops),
183 .map_io = u8500_map_io,
184 .init_irq = ux500_init_irq,
185 /* we re-use nomadik timer here */
186 .init_time = ux500_timer_init,
187 .init_machine = u8500_init_machine,
189 .dt_compat = stericsson_dt_platform_compat,
190 .restart = ux500_restart,