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/of_platform.h>
23 #include <linux/phy.h>
24 #include <linux/spi/spi.h>
25 #include <linux/fsl_devices.h>
26 #include <linux/fs_enet_pd.h>
27 #include <linux/fs_uart_pd.h>
28 #include <linux/reboot.h>
29
30 #include <linux/atomic.h>
31 #include <asm/io.h>
32 #include <asm/irq.h>
33 #include <asm/time.h>
34 #include <asm/prom.h>
35 #include <asm/machdep.h>
36 #include <sysdev/fsl_soc.h>
37 #include <mm/mmu_decl.h>
38 #include <asm/cpm2.h>
39 #include <asm/fsl_hcalls.h> /* For the Freescale hypervisor */
40
41 extern void init_fcc_ioports(struct fs_platform_info*);
42 extern void init_fec_ioports(struct fs_platform_info*);
43 extern void init_smc_ioports(struct fs_uart_platform_info*);
44 static phys_addr_t immrbase = -1;
45
get_immrbase(void)46 phys_addr_t get_immrbase(void)
47 {
48 struct device_node *soc;
49
50 if (immrbase != -1)
51 return immrbase;
52
53 soc = of_find_node_by_type(NULL, "soc");
54 if (soc) {
55 int size;
56 u32 naddr;
57 const __be32 *prop = of_get_property(soc, "#address-cells", &size);
58
59 if (prop && size == 4)
60 naddr = be32_to_cpup(prop);
61 else
62 naddr = 2;
63
64 prop = of_get_property(soc, "ranges", &size);
65 if (prop)
66 immrbase = of_translate_address(soc, prop + naddr);
67
68 of_node_put(soc);
69 }
70
71 return immrbase;
72 }
73
74 EXPORT_SYMBOL(get_immrbase);
75
fsl_get_sys_freq(void)76 u32 fsl_get_sys_freq(void)
77 {
78 static u32 sysfreq = -1;
79 struct device_node *soc;
80
81 if (sysfreq != -1)
82 return sysfreq;
83
84 soc = of_find_node_by_type(NULL, "soc");
85 if (!soc)
86 return -1;
87
88 of_property_read_u32(soc, "clock-frequency", &sysfreq);
89 if (sysfreq == -1 || !sysfreq)
90 of_property_read_u32(soc, "bus-frequency", &sysfreq);
91
92 of_node_put(soc);
93 return sysfreq;
94 }
95 EXPORT_SYMBOL(fsl_get_sys_freq);
96
97 #if defined(CONFIG_CPM) || defined(CONFIG_QUICC_ENGINE)
98
get_brgfreq(void)99 u32 get_brgfreq(void)
100 {
101 static u32 brgfreq = -1;
102 struct device_node *node;
103
104 if (brgfreq != -1)
105 return brgfreq;
106
107 node = of_find_compatible_node(NULL, NULL, "fsl,cpm-brg");
108 if (node) {
109 of_property_read_u32(node, "clock-frequency", &brgfreq);
110 of_node_put(node);
111 return brgfreq;
112 }
113
114 /* Legacy device binding -- will go away when no users are left. */
115 node = of_find_node_by_type(NULL, "cpm");
116 if (!node)
117 node = of_find_compatible_node(NULL, NULL, "fsl,qe");
118 if (!node)
119 node = of_find_node_by_type(NULL, "qe");
120
121 if (node) {
122 of_property_read_u32(node, "brg-frequency", &brgfreq);
123 if (brgfreq == -1 || !brgfreq)
124 if (!of_property_read_u32(node, "bus-frequency",
125 &brgfreq))
126 brgfreq /= 2;
127 of_node_put(node);
128 }
129
130 return brgfreq;
131 }
132
133 EXPORT_SYMBOL(get_brgfreq);
134
get_baudrate(void)135 u32 get_baudrate(void)
136 {
137 static u32 fs_baudrate = -1;
138 struct device_node *node;
139
140 if (fs_baudrate != -1)
141 return fs_baudrate;
142
143 node = of_find_node_by_type(NULL, "serial");
144 if (node) {
145 of_property_read_u32(node, "current-speed", &fs_baudrate);
146 of_node_put(node);
147 }
148
149 return fs_baudrate;
150 }
151
152 EXPORT_SYMBOL(get_baudrate);
153 #endif /* CONFIG_CPM2 */
154
155 #if defined(CONFIG_FSL_SOC_BOOKE) || defined(CONFIG_PPC_86xx)
156 static __be32 __iomem *rstcr;
157
fsl_rstcr_restart(struct notifier_block * this,unsigned long mode,void * cmd)158 static int fsl_rstcr_restart(struct notifier_block *this,
159 unsigned long mode, void *cmd)
160 {
161 local_irq_disable();
162 /* set reset control register */
163 out_be32(rstcr, 0x2); /* HRESET_REQ */
164
165 return NOTIFY_DONE;
166 }
167
setup_rstcr(void)168 static int __init setup_rstcr(void)
169 {
170 struct device_node *np;
171
172 static struct notifier_block restart_handler = {
173 .notifier_call = fsl_rstcr_restart,
174 .priority = 128,
175 };
176
177 for_each_node_by_name(np, "global-utilities") {
178 if ((of_get_property(np, "fsl,has-rstcr", NULL))) {
179 rstcr = of_iomap(np, 0) + 0xb0;
180 if (!rstcr) {
181 printk (KERN_ERR "Error: reset control "
182 "register not mapped!\n");
183 } else {
184 register_restart_handler(&restart_handler);
185 }
186 break;
187 }
188 }
189
190 of_node_put(np);
191
192 return 0;
193 }
194
195 arch_initcall(setup_rstcr);
196
197 #endif
198
199 #if defined(CONFIG_FB_FSL_DIU) || defined(CONFIG_FB_FSL_DIU_MODULE)
200 struct platform_diu_data_ops diu_ops;
201 EXPORT_SYMBOL(diu_ops);
202 #endif
203
204 #ifdef CONFIG_EPAPR_PARAVIRT
205 /*
206 * Restart the current partition
207 *
208 * This function should be assigned to the ppc_md.restart function pointer,
209 * to initiate a partition restart when we're running under the Freescale
210 * hypervisor.
211 */
fsl_hv_restart(char * cmd)212 void __noreturn fsl_hv_restart(char *cmd)
213 {
214 pr_info("hv restart\n");
215 fh_partition_restart(-1);
216 while (1) ;
217 }
218
219 /*
220 * Halt the current partition
221 *
222 * This function should be assigned to the pm_power_off and ppc_md.halt
223 * function pointers, to shut down the partition when we're running under
224 * the Freescale hypervisor.
225 */
fsl_hv_halt(void)226 void __noreturn fsl_hv_halt(void)
227 {
228 pr_info("hv exit\n");
229 fh_partition_stop(-1);
230 while (1) ;
231 }
232 #endif
233