1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * FSL SoC setup code |
4 | * |
5 | * Maintained by Kumar Gala (see MAINTAINERS for contact information) |
6 | * |
7 | * 2006 (c) MontaVista Software, Inc. |
8 | * Vitaly Bordug <vbordug@ru.mvista.com> |
9 | */ |
10 | |
11 | #include <linux/stddef.h> |
12 | #include <linux/kernel.h> |
13 | #include <linux/init.h> |
14 | #include <linux/errno.h> |
15 | #include <linux/major.h> |
16 | #include <linux/delay.h> |
17 | #include <linux/irq.h> |
18 | #include <linux/export.h> |
19 | #include <linux/device.h> |
20 | #include <linux/platform_device.h> |
21 | #include <linux/of.h> |
22 | #include <linux/phy.h> |
23 | #include <linux/spi/spi.h> |
24 | #include <linux/fsl_devices.h> |
25 | #include <linux/reboot.h> |
26 | |
27 | #include <linux/atomic.h> |
28 | #include <asm/io.h> |
29 | #include <asm/irq.h> |
30 | #include <asm/time.h> |
31 | #include <asm/machdep.h> |
32 | #include <sysdev/fsl_soc.h> |
33 | #include <mm/mmu_decl.h> |
34 | #include <asm/cpm2.h> |
35 | #include <asm/fsl_hcalls.h> /* For the Freescale hypervisor */ |
36 | |
37 | static phys_addr_t immrbase = -1; |
38 | |
39 | phys_addr_t get_immrbase(void) |
40 | { |
41 | struct device_node *soc; |
42 | |
43 | if (immrbase != -1) |
44 | return immrbase; |
45 | |
46 | soc = of_find_node_by_type(NULL, type: "soc" ); |
47 | if (soc) { |
48 | struct resource res; |
49 | |
50 | if (!of_range_to_resource(soc, 0, &res)) |
51 | immrbase = res.start; |
52 | |
53 | of_node_put(node: soc); |
54 | } |
55 | |
56 | return immrbase; |
57 | } |
58 | |
59 | EXPORT_SYMBOL(get_immrbase); |
60 | |
61 | u32 fsl_get_sys_freq(void) |
62 | { |
63 | static u32 sysfreq = -1; |
64 | struct device_node *soc; |
65 | |
66 | if (sysfreq != -1) |
67 | return sysfreq; |
68 | |
69 | soc = of_find_node_by_type(NULL, type: "soc" ); |
70 | if (!soc) |
71 | return -1; |
72 | |
73 | of_property_read_u32(np: soc, propname: "clock-frequency" , out_value: &sysfreq); |
74 | if (sysfreq == -1 || !sysfreq) |
75 | of_property_read_u32(np: soc, propname: "bus-frequency" , out_value: &sysfreq); |
76 | |
77 | of_node_put(node: soc); |
78 | return sysfreq; |
79 | } |
80 | EXPORT_SYMBOL(fsl_get_sys_freq); |
81 | |
82 | #if defined(CONFIG_CPM) || defined(CONFIG_QUICC_ENGINE) |
83 | |
84 | u32 get_brgfreq(void) |
85 | { |
86 | static u32 brgfreq = -1; |
87 | struct device_node *node; |
88 | |
89 | if (brgfreq != -1) |
90 | return brgfreq; |
91 | |
92 | node = of_find_compatible_node(NULL, NULL, compat: "fsl,cpm-brg" ); |
93 | if (node) { |
94 | of_property_read_u32(np: node, propname: "clock-frequency" , out_value: &brgfreq); |
95 | of_node_put(node); |
96 | return brgfreq; |
97 | } |
98 | |
99 | /* Legacy device binding -- will go away when no users are left. */ |
100 | node = of_find_node_by_type(NULL, type: "cpm" ); |
101 | if (!node) |
102 | node = of_find_compatible_node(NULL, NULL, compat: "fsl,qe" ); |
103 | if (!node) |
104 | node = of_find_node_by_type(NULL, type: "qe" ); |
105 | |
106 | if (node) { |
107 | of_property_read_u32(np: node, propname: "brg-frequency" , out_value: &brgfreq); |
108 | if (brgfreq == -1 || !brgfreq) |
109 | if (!of_property_read_u32(np: node, propname: "bus-frequency" , |
110 | out_value: &brgfreq)) |
111 | brgfreq /= 2; |
112 | of_node_put(node); |
113 | } |
114 | |
115 | return brgfreq; |
116 | } |
117 | |
118 | EXPORT_SYMBOL(get_brgfreq); |
119 | |
120 | u32 get_baudrate(void) |
121 | { |
122 | static u32 fs_baudrate = -1; |
123 | struct device_node *node; |
124 | |
125 | if (fs_baudrate != -1) |
126 | return fs_baudrate; |
127 | |
128 | node = of_find_node_by_type(NULL, type: "serial" ); |
129 | if (node) { |
130 | of_property_read_u32(np: node, propname: "current-speed" , out_value: &fs_baudrate); |
131 | of_node_put(node); |
132 | } |
133 | |
134 | return fs_baudrate; |
135 | } |
136 | |
137 | EXPORT_SYMBOL(get_baudrate); |
138 | #endif /* CONFIG_CPM2 */ |
139 | |
140 | #if defined(CONFIG_FSL_SOC_BOOKE) || defined(CONFIG_PPC_86xx) |
141 | static __be32 __iomem *rstcr; |
142 | |
143 | static int fsl_rstcr_restart(struct notifier_block *this, |
144 | unsigned long mode, void *cmd) |
145 | { |
146 | local_irq_disable(); |
147 | /* set reset control register */ |
148 | out_be32(rstcr, 0x2); /* HRESET_REQ */ |
149 | |
150 | return NOTIFY_DONE; |
151 | } |
152 | |
153 | static int __init setup_rstcr(void) |
154 | { |
155 | struct device_node *np; |
156 | |
157 | static struct notifier_block restart_handler = { |
158 | .notifier_call = fsl_rstcr_restart, |
159 | .priority = 128, |
160 | }; |
161 | |
162 | for_each_node_by_name(np, "global-utilities" ) { |
163 | if (of_property_read_bool(np, "fsl,has-rstcr" )) { |
164 | rstcr = of_iomap(np, 0) + 0xb0; |
165 | if (!rstcr) { |
166 | printk (KERN_ERR "Error: reset control " |
167 | "register not mapped!\n" ); |
168 | } else { |
169 | register_restart_handler(&restart_handler); |
170 | } |
171 | break; |
172 | } |
173 | } |
174 | |
175 | of_node_put(np); |
176 | |
177 | return 0; |
178 | } |
179 | |
180 | arch_initcall(setup_rstcr); |
181 | |
182 | #endif |
183 | |
184 | #if defined(CONFIG_FB_FSL_DIU) || defined(CONFIG_FB_FSL_DIU_MODULE) |
185 | struct platform_diu_data_ops diu_ops; |
186 | EXPORT_SYMBOL(diu_ops); |
187 | #endif |
188 | |
189 | #ifdef CONFIG_EPAPR_PARAVIRT |
190 | /* |
191 | * Restart the current partition |
192 | * |
193 | * This function should be assigned to the ppc_md.restart function pointer, |
194 | * to initiate a partition restart when we're running under the Freescale |
195 | * hypervisor. |
196 | */ |
197 | void __noreturn fsl_hv_restart(char *cmd) |
198 | { |
199 | pr_info("hv restart\n" ); |
200 | fh_partition_restart(-1); |
201 | while (1) ; |
202 | } |
203 | |
204 | /* |
205 | * Halt the current partition |
206 | * |
207 | * This function should be assigned to the pm_power_off and ppc_md.halt |
208 | * function pointers, to shut down the partition when we're running under |
209 | * the Freescale hypervisor. |
210 | */ |
211 | void __noreturn fsl_hv_halt(void) |
212 | { |
213 | pr_info("hv exit\n" ); |
214 | fh_partition_stop(-1); |
215 | while (1) ; |
216 | } |
217 | #endif |
218 | |