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1/*
2 * Copyright 2010-2011 Calxeda, Inc.
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms and conditions of the GNU General Public License,
6 * version 2, as published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
11 * more details.
12 *
13 * You should have received a copy of the GNU General Public License along with
14 * this program. If not, see <http://www.gnu.org/licenses/>.
15 */
16#include <linux/clk.h>
17#include <linux/clkdev.h>
18#include <linux/clocksource.h>
19#include <linux/dma-mapping.h>
20#include <linux/input.h>
21#include <linux/io.h>
22#include <linux/irqchip.h>
23#include <linux/pl320-ipc.h>
24#include <linux/of.h>
25#include <linux/of_irq.h>
26#include <linux/of_address.h>
27#include <linux/reboot.h>
28#include <linux/amba/bus.h>
29#include <linux/platform_device.h>
30#include <linux/psci.h>
31
32#include <asm/hardware/cache-l2x0.h>
33#include <asm/mach/arch.h>
34#include <asm/mach/map.h>
35
36#include "core.h"
37#include "sysregs.h"
38
39void __iomem *sregs_base;
40void __iomem *scu_base_addr;
41
42static void __init highbank_scu_map_io(void)
43{
44 unsigned long base;
45
46 /* Get SCU base */
47 asm("mrc p15, 4, %0, c15, c0, 0" : "=r" (base));
48
49 scu_base_addr = ioremap(base, SZ_4K);
50}
51
52
53static void highbank_l2c310_write_sec(unsigned long val, unsigned reg)
54{
55 if (reg == L2X0_CTRL)
56 highbank_smc1(0x102, val);
57 else
58 WARN_ONCE(1, "Highbank L2C310: ignoring write to reg 0x%x\n",
59 reg);
60}
61
62static void __init highbank_init_irq(void)
63{
64 irqchip_init();
65
66 if (of_find_compatible_node(NULL, NULL, "arm,cortex-a9"))
67 highbank_scu_map_io();
68}
69
70static void highbank_power_off(void)
71{
72 highbank_set_pwr_shutdown();
73
74 while (1)
75 cpu_do_idle();
76}
77
78static int highbank_platform_notifier(struct notifier_block *nb,
79 unsigned long event, void *__dev)
80{
81 struct resource *res;
82 int reg = -1;
83 u32 val;
84 struct device *dev = __dev;
85
86 if (event != BUS_NOTIFY_ADD_DEVICE)
87 return NOTIFY_DONE;
88
89 if (of_device_is_compatible(dev->of_node, "calxeda,hb-ahci"))
90 reg = 0xc;
91 else if (of_device_is_compatible(dev->of_node, "calxeda,hb-sdhci"))
92 reg = 0x18;
93 else if (of_device_is_compatible(dev->of_node, "arm,pl330"))
94 reg = 0x20;
95 else if (of_device_is_compatible(dev->of_node, "calxeda,hb-xgmac")) {
96 res = platform_get_resource(to_platform_device(dev),
97 IORESOURCE_MEM, 0);
98 if (res) {
99 if (res->start == 0xfff50000)
100 reg = 0;
101 else if (res->start == 0xfff51000)
102 reg = 4;
103 }
104 }
105
106 if (reg < 0)
107 return NOTIFY_DONE;
108
109 if (of_property_read_bool(dev->of_node, "dma-coherent")) {
110 val = readl(sregs_base + reg);
111 writel(val | 0xff01, sregs_base + reg);
112 set_dma_ops(dev, &arm_coherent_dma_ops);
113 }
114
115 return NOTIFY_OK;
116}
117
118static struct notifier_block highbank_amba_nb = {
119 .notifier_call = highbank_platform_notifier,
120};
121
122static struct notifier_block highbank_platform_nb = {
123 .notifier_call = highbank_platform_notifier,
124};
125
126static struct platform_device highbank_cpuidle_device = {
127 .name = "cpuidle-calxeda",
128};
129
130static int hb_keys_notifier(struct notifier_block *nb, unsigned long event, void *data)
131{
132 u32 key = *(u32 *)data;
133
134 if (event != 0x1000)
135 return 0;
136
137 if (key == KEY_POWER)
138 orderly_poweroff(false);
139 else if (key == 0xffff)
140 ctrl_alt_del();
141
142 return 0;
143}
144static struct notifier_block hb_keys_nb = {
145 .notifier_call = hb_keys_notifier,
146};
147
148static void __init highbank_init(void)
149{
150 struct device_node *np;
151
152 /* Map system registers */
153 np = of_find_compatible_node(NULL, NULL, "calxeda,hb-sregs");
154 sregs_base = of_iomap(np, 0);
155 WARN_ON(!sregs_base);
156
157 pm_power_off = highbank_power_off;
158 highbank_pm_init();
159
160 bus_register_notifier(&platform_bus_type, &highbank_platform_nb);
161 bus_register_notifier(&amba_bustype, &highbank_amba_nb);
162
163 pl320_ipc_register_notifier(&hb_keys_nb);
164
165 if (psci_ops.cpu_suspend)
166 platform_device_register(&highbank_cpuidle_device);
167}
168
169static const char *const highbank_match[] __initconst = {
170 "calxeda,highbank",
171 "calxeda,ecx-2000",
172 NULL,
173};
174
175DT_MACHINE_START(HIGHBANK, "Highbank")
176#if defined(CONFIG_ZONE_DMA) && defined(CONFIG_ARM_LPAE)
177 .dma_zone_size = (4ULL * SZ_1G),
178#endif
179 .l2c_aux_val = 0,
180 .l2c_aux_mask = ~0,
181 .l2c_write_sec = highbank_l2c310_write_sec,
182 .init_irq = highbank_init_irq,
183 .init_machine = highbank_init,
184 .dt_compat = highbank_match,
185 .restart = highbank_restart,
186MACHINE_END
187

Warning: That file was not part of the compilation database. It may have many parsing errors.