1 /*
2 * FSL SoC setup code
3 *
4 * Maintained by Kumar Gala (see MAINTAINERS for contact information)
5 *
6 * 2006 (c) MontaVista Software, Inc.
7 * Vitaly Bordug <vbordug@ru.mvista.com>
8 *
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License as published by the
11 * Free Software Foundation; either version 2 of the License, or (at your
12 * option) any later version.
13 */
14
15 #include <linux/stddef.h>
16 #include <linux/kernel.h>
17 #include <linux/init.h>
18 #include <linux/errno.h>
19 #include <linux/major.h>
20 #include <linux/delay.h>
21 #include <linux/irq.h>
22 #include <linux/export.h>
23 #include <linux/device.h>
24 #include <linux/platform_device.h>
25 #include <linux/of.h>
26 #include <linux/of_platform.h>
27 #include <linux/phy.h>
28 #include <linux/phy_fixed.h>
29 #include <linux/spi/spi.h>
30 #include <linux/fsl_devices.h>
31 #include <linux/fs_enet_pd.h>
32 #include <linux/fs_uart_pd.h>
33
34 #include <linux/atomic.h>
35 #include <asm/io.h>
36 #include <asm/irq.h>
37 #include <asm/time.h>
38 #include <asm/prom.h>
39 #include <asm/machdep.h>
40 #include <sysdev/fsl_soc.h>
41 #include <mm/mmu_decl.h>
42 #include <asm/cpm2.h>
43 #include <asm/fsl_hcalls.h> /* For the Freescale hypervisor */
44
45 extern void init_fcc_ioports(struct fs_platform_info*);
46 extern void init_fec_ioports(struct fs_platform_info*);
47 extern void init_smc_ioports(struct fs_uart_platform_info*);
48 static phys_addr_t immrbase = -1;
49
get_immrbase(void)50 phys_addr_t get_immrbase(void)
51 {
52 struct device_node *soc;
53
54 if (immrbase != -1)
55 return immrbase;
56
57 soc = of_find_node_by_type(NULL, "soc");
58 if (soc) {
59 int size;
60 u32 naddr;
61 const u32 *prop = of_get_property(soc, "#address-cells", &size);
62
63 if (prop && size == 4)
64 naddr = *prop;
65 else
66 naddr = 2;
67
68 prop = of_get_property(soc, "ranges", &size);
69 if (prop)
70 immrbase = of_translate_address(soc, prop + naddr);
71
72 of_node_put(soc);
73 }
74
75 return immrbase;
76 }
77
78 EXPORT_SYMBOL(get_immrbase);
79
80 static u32 sysfreq = -1;
81
fsl_get_sys_freq(void)82 u32 fsl_get_sys_freq(void)
83 {
84 struct device_node *soc;
85 const u32 *prop;
86 int size;
87
88 if (sysfreq != -1)
89 return sysfreq;
90
91 soc = of_find_node_by_type(NULL, "soc");
92 if (!soc)
93 return -1;
94
95 prop = of_get_property(soc, "clock-frequency", &size);
96 if (!prop || size != sizeof(*prop) || *prop == 0)
97 prop = of_get_property(soc, "bus-frequency", &size);
98
99 if (prop && size == sizeof(*prop))
100 sysfreq = *prop;
101
102 of_node_put(soc);
103 return sysfreq;
104 }
105 EXPORT_SYMBOL(fsl_get_sys_freq);
106
107 #if defined(CONFIG_CPM2) || defined(CONFIG_QUICC_ENGINE) || defined(CONFIG_8xx)
108
109 static u32 brgfreq = -1;
110
get_brgfreq(void)111 u32 get_brgfreq(void)
112 {
113 struct device_node *node;
114 const unsigned int *prop;
115 int size;
116
117 if (brgfreq != -1)
118 return brgfreq;
119
120 node = of_find_compatible_node(NULL, NULL, "fsl,cpm-brg");
121 if (node) {
122 prop = of_get_property(node, "clock-frequency", &size);
123 if (prop && size == 4)
124 brgfreq = *prop;
125
126 of_node_put(node);
127 return brgfreq;
128 }
129
130 /* Legacy device binding -- will go away when no users are left. */
131 node = of_find_node_by_type(NULL, "cpm");
132 if (!node)
133 node = of_find_compatible_node(NULL, NULL, "fsl,qe");
134 if (!node)
135 node = of_find_node_by_type(NULL, "qe");
136
137 if (node) {
138 prop = of_get_property(node, "brg-frequency", &size);
139 if (prop && size == 4)
140 brgfreq = *prop;
141
142 if (brgfreq == -1 || brgfreq == 0) {
143 prop = of_get_property(node, "bus-frequency", &size);
144 if (prop && size == 4)
145 brgfreq = *prop / 2;
146 }
147 of_node_put(node);
148 }
149
150 return brgfreq;
151 }
152
153 EXPORT_SYMBOL(get_brgfreq);
154
155 static u32 fs_baudrate = -1;
156
get_baudrate(void)157 u32 get_baudrate(void)
158 {
159 struct device_node *node;
160
161 if (fs_baudrate != -1)
162 return fs_baudrate;
163
164 node = of_find_node_by_type(NULL, "serial");
165 if (node) {
166 int size;
167 const unsigned int *prop = of_get_property(node,
168 "current-speed", &size);
169
170 if (prop)
171 fs_baudrate = *prop;
172 of_node_put(node);
173 }
174
175 return fs_baudrate;
176 }
177
178 EXPORT_SYMBOL(get_baudrate);
179 #endif /* CONFIG_CPM2 */
180
181 #ifdef CONFIG_FIXED_PHY
of_add_fixed_phys(void)182 static int __init of_add_fixed_phys(void)
183 {
184 int ret;
185 struct device_node *np;
186 u32 *fixed_link;
187 struct fixed_phy_status status = {};
188
189 for_each_node_by_name(np, "ethernet") {
190 fixed_link = (u32 *)of_get_property(np, "fixed-link", NULL);
191 if (!fixed_link)
192 continue;
193
194 status.link = 1;
195 status.duplex = fixed_link[1];
196 status.speed = fixed_link[2];
197 status.pause = fixed_link[3];
198 status.asym_pause = fixed_link[4];
199
200 ret = fixed_phy_add(PHY_POLL, fixed_link[0], &status);
201 if (ret) {
202 of_node_put(np);
203 return ret;
204 }
205 }
206
207 return 0;
208 }
209 arch_initcall(of_add_fixed_phys);
210 #endif /* CONFIG_FIXED_PHY */
211
212 #if defined(CONFIG_FSL_SOC_BOOKE) || defined(CONFIG_PPC_86xx)
213 static __be32 __iomem *rstcr;
214
setup_rstcr(void)215 static int __init setup_rstcr(void)
216 {
217 struct device_node *np;
218
219 for_each_node_by_name(np, "global-utilities") {
220 if ((of_get_property(np, "fsl,has-rstcr", NULL))) {
221 rstcr = of_iomap(np, 0) + 0xb0;
222 if (!rstcr)
223 printk (KERN_ERR "Error: reset control "
224 "register not mapped!\n");
225 break;
226 }
227 }
228
229 if (!rstcr && ppc_md.restart == fsl_rstcr_restart)
230 printk(KERN_ERR "No RSTCR register, warm reboot won't work\n");
231
232 if (np)
233 of_node_put(np);
234
235 return 0;
236 }
237
238 arch_initcall(setup_rstcr);
239
fsl_rstcr_restart(char * cmd)240 void fsl_rstcr_restart(char *cmd)
241 {
242 local_irq_disable();
243 if (rstcr)
244 /* set reset control register */
245 out_be32(rstcr, 0x2); /* HRESET_REQ */
246
247 while (1) ;
248 }
249 #endif
250
251 #if defined(CONFIG_FB_FSL_DIU) || defined(CONFIG_FB_FSL_DIU_MODULE)
252 struct platform_diu_data_ops diu_ops;
253 EXPORT_SYMBOL(diu_ops);
254 #endif
255
256 /*
257 * Restart the current partition
258 *
259 * This function should be assigned to the ppc_md.restart function pointer,
260 * to initiate a partition restart when we're running under the Freescale
261 * hypervisor.
262 */
fsl_hv_restart(char * cmd)263 void fsl_hv_restart(char *cmd)
264 {
265 pr_info("hv restart\n");
266 fh_partition_restart(-1);
267 }
268
269 /*
270 * Halt the current partition
271 *
272 * This function should be assigned to the ppc_md.power_off and ppc_md.halt
273 * function pointers, to shut down the partition when we're running under
274 * the Freescale hypervisor.
275 */
fsl_hv_halt(void)276 void fsl_hv_halt(void)
277 {
278 pr_info("hv exit\n");
279 fh_partition_stop(-1);
280 }
281