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