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-map-ops.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 | |
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(offset: base, SZ_4K); |
39 | } |
40 | |
41 | |
42 | static void highbank_l2c310_write_sec(unsigned long val, unsigned reg) |
43 | { |
44 | if (reg == L2X0_CTRL) |
45 | highbank_smc1(fn: 0x102, arg: val); |
46 | else |
47 | WARN_ONCE(1, "Highbank L2C310: ignoring write to reg 0x%x\n" , |
48 | reg); |
49 | } |
50 | |
51 | static void __init highbank_init_irq(void) |
52 | { |
53 | irqchip_init(); |
54 | |
55 | if (of_find_compatible_node(NULL, NULL, compat: "arm,cortex-a9" )) |
56 | highbank_scu_map_io(); |
57 | } |
58 | |
59 | static void highbank_power_off(void) |
60 | { |
61 | highbank_set_pwr_shutdown(); |
62 | |
63 | while (1) |
64 | cpu_do_idle(); |
65 | } |
66 | |
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(device: dev->of_node, "calxeda,hb-ahci" )) |
79 | reg = 0xc; |
80 | else if (of_device_is_compatible(device: dev->of_node, "calxeda,hb-sdhci" )) |
81 | reg = 0x18; |
82 | else if (of_device_is_compatible(device: dev->of_node, "arm,pl330" )) |
83 | reg = 0x20; |
84 | else if (of_device_is_compatible(device: 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(np: dev->of_node, propname: "dma-coherent" )) { |
99 | val = readl(addr: sregs_base + reg); |
100 | writel(val: val | 0xff01, addr: sregs_base + reg); |
101 | dev->dma_coherent = true; |
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 | |
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(force: 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 | |
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, compat: "calxeda,hb-sregs" ); |
143 | sregs_base = of_iomap(node: np, index: 0); |
144 | WARN_ON(!sregs_base); |
145 | |
146 | pm_power_off = highbank_power_off; |
147 | highbank_pm_init(); |
148 | |
149 | bus_register_notifier(bus: &platform_bus_type, nb: &highbank_platform_nb); |
150 | bus_register_notifier(bus: &amba_bustype, nb: &highbank_amba_nb); |
151 | |
152 | pl320_ipc_register_notifier(nb: &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 | |