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/platform_data/pinctrl-nomadik.h>
25 #include <linux/random.h>
28 #include <asm/mach/map.h>
34 #include "devices-db8500.h"
35 #include "db8500-regs.h"
36 #include "board-mop500.h"
39 /* minimum static i/o mapping required to boot U8500 platforms */
40 static struct map_desc u8500_uart_io_desc[] __initdata = {
41 __IO_DEV_DESC(U8500_UART0_BASE, SZ_4K),
42 __IO_DEV_DESC(U8500_UART2_BASE, SZ_4K),
44 /* U8500 and U9540 common io_desc */
45 static struct map_desc u8500_common_io_desc[] __initdata = {
46 /* SCU base also covers GIC CPU BASE and TWD with its 4K page */
47 __IO_DEV_DESC(U8500_SCU_BASE, SZ_4K),
48 __IO_DEV_DESC(U8500_GIC_DIST_BASE, SZ_4K),
49 __IO_DEV_DESC(U8500_L2CC_BASE, SZ_4K),
50 __IO_DEV_DESC(U8500_MTU0_BASE, SZ_4K),
51 __IO_DEV_DESC(U8500_BACKUPRAM0_BASE, SZ_8K),
53 __IO_DEV_DESC(U8500_CLKRST1_BASE, SZ_4K),
54 __IO_DEV_DESC(U8500_CLKRST2_BASE, SZ_4K),
55 __IO_DEV_DESC(U8500_CLKRST3_BASE, SZ_4K),
56 __IO_DEV_DESC(U8500_CLKRST5_BASE, SZ_4K),
57 __IO_DEV_DESC(U8500_CLKRST6_BASE, SZ_4K),
59 __IO_DEV_DESC(U8500_GPIO0_BASE, SZ_4K),
60 __IO_DEV_DESC(U8500_GPIO1_BASE, SZ_4K),
61 __IO_DEV_DESC(U8500_GPIO2_BASE, SZ_4K),
62 __IO_DEV_DESC(U8500_GPIO3_BASE, SZ_4K),
65 /* U8500 IO map specific description */
66 static struct map_desc u8500_io_desc[] __initdata = {
67 __IO_DEV_DESC(U8500_PRCMU_BASE, SZ_4K),
68 __IO_DEV_DESC(U8500_PRCMU_TCDM_BASE, SZ_4K),
72 /* U9540 IO map specific description */
73 static struct map_desc u9540_io_desc[] __initdata = {
74 __IO_DEV_DESC(U8500_PRCMU_BASE, SZ_4K + SZ_8K),
75 __IO_DEV_DESC(U8500_PRCMU_TCDM_BASE, SZ_4K + SZ_8K),
78 void __init u8500_map_io(void)
81 * Map the UARTs early so that the DEBUG_LL stuff continues to work.
83 iotable_init(u8500_uart_io_desc, ARRAY_SIZE(u8500_uart_io_desc));
87 iotable_init(u8500_common_io_desc, ARRAY_SIZE(u8500_common_io_desc));
89 if (cpu_is_ux540_family())
90 iotable_init(u9540_io_desc, ARRAY_SIZE(u9540_io_desc));
92 iotable_init(u8500_io_desc, ARRAY_SIZE(u8500_io_desc));
96 * The PMU IRQ lines of two cores are wired together into a single interrupt.
97 * Bounce the interrupt to the other core if it's not ours.
99 static irqreturn_t db8500_pmu_handler(int irq, void *dev, irq_handler_t handler)
101 irqreturn_t ret = handler(irq, dev);
102 int other = !smp_processor_id();
104 if (ret == IRQ_NONE && cpu_online(other))
105 irq_set_affinity(irq, cpumask_of(other));
108 * We should be able to get away with the amount of IRQ_NONEs we give,
109 * while still having the spurious IRQ detection code kick in if the
110 * interrupt really starts hitting spuriously.
115 struct arm_pmu_platdata db8500_pmu_platdata = {
116 .handle_irq = db8500_pmu_handler,
119 static const char *db8500_read_soc_id(void)
121 void __iomem *uid = __io_address(U8500_BB_UID_BASE);
123 /* Throw these device-specific numbers into the entropy pool */
124 add_device_randomness(uid, 0x14);
125 return kasprintf(GFP_KERNEL, "%08x%08x%08x%08x%08x",
127 readl((u32 *)uid+1), readl((u32 *)uid+2),
128 readl((u32 *)uid+3), readl((u32 *)uid+4));
131 static struct device * __init db8500_soc_device_init(void)
133 const char *soc_id = db8500_read_soc_id();
135 return ux500_soc_device_init(soc_id);
138 #ifdef CONFIG_MACH_UX500_DT
139 static struct of_dev_auxdata u8500_auxdata_lookup[] __initdata = {
140 /* Requires call-back bindings. */
141 OF_DEV_AUXDATA("arm,cortex-a9-pmu", 0, "arm-pmu", &db8500_pmu_platdata),
142 /* Requires DMA bindings. */
143 OF_DEV_AUXDATA("arm,pl18x", 0x80126000, "sdi0", &mop500_sdi0_data),
144 OF_DEV_AUXDATA("arm,pl18x", 0x80118000, "sdi1", &mop500_sdi1_data),
145 OF_DEV_AUXDATA("arm,pl18x", 0x80005000, "sdi2", &mop500_sdi2_data),
146 OF_DEV_AUXDATA("arm,pl18x", 0x80114000, "sdi4", &mop500_sdi4_data),
147 OF_DEV_AUXDATA("stericsson,ux500-msp-i2s", 0x80123000,
148 "ux500-msp-i2s.0", &msp0_platform_data),
149 OF_DEV_AUXDATA("stericsson,ux500-msp-i2s", 0x80124000,
150 "ux500-msp-i2s.1", &msp1_platform_data),
151 OF_DEV_AUXDATA("stericsson,ux500-msp-i2s", 0x80117000,
152 "ux500-msp-i2s.2", &msp2_platform_data),
153 OF_DEV_AUXDATA("stericsson,ux500-msp-i2s", 0x80125000,
154 "ux500-msp-i2s.3", &msp3_platform_data),
155 /* Requires non-DT:able platform data. */
156 OF_DEV_AUXDATA("stericsson,db8500-prcmu", 0x80157000, "db8500-prcmu",
157 &db8500_prcmu_pdata),
158 OF_DEV_AUXDATA("stericsson,ux500-cryp", 0xa03cb000, "cryp1", NULL),
159 OF_DEV_AUXDATA("stericsson,ux500-hash", 0xa03c2000, "hash1", NULL),
160 OF_DEV_AUXDATA("stericsson,snd-soc-mop500", 0, "snd-soc-mop500.0",
162 /* Requires device name bindings. */
163 OF_DEV_AUXDATA("stericsson,db8500-pinctrl", U8500_PRCMU_BASE,
164 "pinctrl-db8500", NULL),
168 static struct of_dev_auxdata u8540_auxdata_lookup[] __initdata = {
169 /* Requires DMA bindings. */
170 OF_DEV_AUXDATA("arm,pl011", 0x80120000, "uart0", NULL),
171 OF_DEV_AUXDATA("arm,pl011", 0x80121000, "uart1", NULL),
172 OF_DEV_AUXDATA("arm,pl011", 0x80007000, "uart2", NULL),
173 OF_DEV_AUXDATA("stericsson,db8500-prcmu", 0x80157000, "db8500-prcmu",
174 &db8500_prcmu_pdata),
178 static const struct of_device_id u8500_local_bus_nodes[] = {
179 /* only create devices below soc node */
180 { .compatible = "stericsson,db8500", },
181 { .compatible = "stericsson,db8500-prcmu", },
182 { .compatible = "simple-bus"},
186 static void __init u8500_init_machine(void)
188 struct device *parent = db8500_soc_device_init();
190 /* Pinmaps must be in place before devices register */
191 if (of_machine_is_compatible("st-ericsson,mop500"))
192 mop500_pinmaps_init();
193 else if (of_machine_is_compatible("calaosystems,snowball-a9500")) {
194 snowball_pinmaps_init();
195 } else if (of_machine_is_compatible("st-ericsson,hrefv60+"))
196 hrefv60_pinmaps_init();
197 else if (of_machine_is_compatible("st-ericsson,ccu9540")) {}
198 /* TODO: Add pinmaps for ccu9540 board. */
200 /* automatically probe child nodes of dbx5x0 devices */
201 if (of_machine_is_compatible("st-ericsson,u8540"))
202 of_platform_populate(NULL, u8500_local_bus_nodes,
203 u8540_auxdata_lookup, parent);
205 of_platform_populate(NULL, u8500_local_bus_nodes,
206 u8500_auxdata_lookup, parent);
209 static const char * stericsson_dt_platform_compat[] = {
217 DT_MACHINE_START(U8500_DT, "ST-Ericsson Ux5x0 platform (Device Tree Support)")
218 .smp = smp_ops(ux500_smp_ops),
219 .map_io = u8500_map_io,
220 .init_irq = ux500_init_irq,
221 /* we re-use nomadik timer here */
222 .init_time = ux500_timer_init,
223 .init_machine = u8500_init_machine,
225 .dt_compat = stericsson_dt_platform_compat,
226 .restart = ux500_restart,