1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright 2010-2011 Calxeda, Inc.
4 */
5 #include <linux/clk.h>
6 #include <linux/clkdev.h>
7 #include <linux/clocksource.h>
8 #include <linux/dma-mapping.h>
9 #include <linux/input.h>
10 #include <linux/io.h>
11 #include <linux/irqchip.h>
12 #include <linux/pl320-ipc.h>
13 #include <linux/of.h>
14 #include <linux/of_irq.h>
15 #include <linux/of_address.h>
16 #include <linux/reboot.h>
17 #include <linux/amba/bus.h>
18 #include <linux/platform_device.h>
19 #include <linux/psci.h>
20
21 #include <asm/hardware/cache-l2x0.h>
22 #include <asm/mach/arch.h>
23 #include <asm/mach/map.h>
24
25 #include "core.h"
26 #include "sysregs.h"
27
28 void __iomem *sregs_base;
29 void __iomem *scu_base_addr;
30
highbank_scu_map_io(void)31 static void __init highbank_scu_map_io(void)
32 {
33 unsigned long base;
34
35 /* Get SCU base */
36 asm("mrc p15, 4, %0, c15, c0, 0" : "=r" (base));
37
38 scu_base_addr = ioremap(base, SZ_4K);
39 }
40
41
highbank_l2c310_write_sec(unsigned long val,unsigned reg)42 static void highbank_l2c310_write_sec(unsigned long val, unsigned reg)
43 {
44 if (reg == L2X0_CTRL)
45 highbank_smc1(0x102, val);
46 else
47 WARN_ONCE(1, "Highbank L2C310: ignoring write to reg 0x%x\n",
48 reg);
49 }
50
highbank_init_irq(void)51 static void __init highbank_init_irq(void)
52 {
53 irqchip_init();
54
55 if (of_find_compatible_node(NULL, NULL, "arm,cortex-a9"))
56 highbank_scu_map_io();
57 }
58
highbank_power_off(void)59 static void highbank_power_off(void)
60 {
61 highbank_set_pwr_shutdown();
62
63 while (1)
64 cpu_do_idle();
65 }
66
highbank_platform_notifier(struct notifier_block * nb,unsigned long event,void * __dev)67 static int highbank_platform_notifier(struct notifier_block *nb,
68 unsigned long event, void *__dev)
69 {
70 struct resource *res;
71 int reg = -1;
72 u32 val;
73 struct device *dev = __dev;
74
75 if (event != BUS_NOTIFY_ADD_DEVICE)
76 return NOTIFY_DONE;
77
78 if (of_device_is_compatible(dev->of_node, "calxeda,hb-ahci"))
79 reg = 0xc;
80 else if (of_device_is_compatible(dev->of_node, "calxeda,hb-sdhci"))
81 reg = 0x18;
82 else if (of_device_is_compatible(dev->of_node, "arm,pl330"))
83 reg = 0x20;
84 else if (of_device_is_compatible(dev->of_node, "calxeda,hb-xgmac")) {
85 res = platform_get_resource(to_platform_device(dev),
86 IORESOURCE_MEM, 0);
87 if (res) {
88 if (res->start == 0xfff50000)
89 reg = 0;
90 else if (res->start == 0xfff51000)
91 reg = 4;
92 }
93 }
94
95 if (reg < 0)
96 return NOTIFY_DONE;
97
98 if (of_property_read_bool(dev->of_node, "dma-coherent")) {
99 val = readl(sregs_base + reg);
100 writel(val | 0xff01, sregs_base + reg);
101 set_dma_ops(dev, &arm_coherent_dma_ops);
102 }
103
104 return NOTIFY_OK;
105 }
106
107 static struct notifier_block highbank_amba_nb = {
108 .notifier_call = highbank_platform_notifier,
109 };
110
111 static struct notifier_block highbank_platform_nb = {
112 .notifier_call = highbank_platform_notifier,
113 };
114
115 static struct platform_device highbank_cpuidle_device = {
116 .name = "cpuidle-calxeda",
117 };
118
hb_keys_notifier(struct notifier_block * nb,unsigned long event,void * data)119 static int hb_keys_notifier(struct notifier_block *nb, unsigned long event, void *data)
120 {
121 u32 key = *(u32 *)data;
122
123 if (event != 0x1000)
124 return 0;
125
126 if (key == KEY_POWER)
127 orderly_poweroff(false);
128 else if (key == 0xffff)
129 ctrl_alt_del();
130
131 return 0;
132 }
133 static struct notifier_block hb_keys_nb = {
134 .notifier_call = hb_keys_notifier,
135 };
136
highbank_init(void)137 static void __init highbank_init(void)
138 {
139 struct device_node *np;
140
141 /* Map system registers */
142 np = of_find_compatible_node(NULL, NULL, "calxeda,hb-sregs");
143 sregs_base = of_iomap(np, 0);
144 WARN_ON(!sregs_base);
145
146 pm_power_off = highbank_power_off;
147 highbank_pm_init();
148
149 bus_register_notifier(&platform_bus_type, &highbank_platform_nb);
150 bus_register_notifier(&amba_bustype, &highbank_amba_nb);
151
152 pl320_ipc_register_notifier(&hb_keys_nb);
153
154 if (psci_ops.cpu_suspend)
155 platform_device_register(&highbank_cpuidle_device);
156 }
157
158 static const char *const highbank_match[] __initconst = {
159 "calxeda,highbank",
160 "calxeda,ecx-2000",
161 NULL,
162 };
163
164 DT_MACHINE_START(HIGHBANK, "Highbank")
165 #if defined(CONFIG_ZONE_DMA) && defined(CONFIG_ARM_LPAE)
166 .dma_zone_size = (4ULL * SZ_1G),
167 #endif
168 .l2c_aux_val = 0,
169 .l2c_aux_mask = ~0,
170 .l2c_write_sec = highbank_l2c310_write_sec,
171 .init_irq = highbank_init_irq,
172 .init_machine = highbank_init,
173 .dt_compat = highbank_match,
174 .restart = highbank_restart,
175 MACHINE_END
176
