MIPS: Yosemite, Emma: Fix off-by-two in arcs_cmdline buffer size check
[linux-2.6/linux-mips.git] / arch / powerpc / sysdev / fsl_soc.c
blob2d66275e489fbc88f130664b84eab979f1c39485
1 /*
2 * FSL SoC setup code
4 * Maintained by Kumar Gala (see MAINTAINERS for contact information)
6 * 2006 (c) MontaVista Software, Inc.
7 * Vitaly Bordug <vbordug@ru.mvista.com>
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.
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/module.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>
34 #include <asm/system.h>
35 #include <linux/atomic.h>
36 #include <asm/io.h>
37 #include <asm/irq.h>
38 #include <asm/time.h>
39 #include <asm/prom.h>
40 #include <asm/machdep.h>
41 #include <sysdev/fsl_soc.h>
42 #include <mm/mmu_decl.h>
43 #include <asm/cpm2.h>
44 #include <asm/fsl_hcalls.h> /* For the Freescale hypervisor */
46 extern void init_fcc_ioports(struct fs_platform_info*);
47 extern void init_fec_ioports(struct fs_platform_info*);
48 extern void init_smc_ioports(struct fs_uart_platform_info*);
49 static phys_addr_t immrbase = -1;
51 phys_addr_t get_immrbase(void)
53 struct device_node *soc;
55 if (immrbase != -1)
56 return immrbase;
58 soc = of_find_node_by_type(NULL, "soc");
59 if (soc) {
60 int size;
61 u32 naddr;
62 const u32 *prop = of_get_property(soc, "#address-cells", &size);
64 if (prop && size == 4)
65 naddr = *prop;
66 else
67 naddr = 2;
69 prop = of_get_property(soc, "ranges", &size);
70 if (prop)
71 immrbase = of_translate_address(soc, prop + naddr);
73 of_node_put(soc);
76 return immrbase;
79 EXPORT_SYMBOL(get_immrbase);
81 static u32 sysfreq = -1;
83 u32 fsl_get_sys_freq(void)
85 struct device_node *soc;
86 const u32 *prop;
87 int size;
89 if (sysfreq != -1)
90 return sysfreq;
92 soc = of_find_node_by_type(NULL, "soc");
93 if (!soc)
94 return -1;
96 prop = of_get_property(soc, "clock-frequency", &size);
97 if (!prop || size != sizeof(*prop) || *prop == 0)
98 prop = of_get_property(soc, "bus-frequency", &size);
100 if (prop && size == sizeof(*prop))
101 sysfreq = *prop;
103 of_node_put(soc);
104 return sysfreq;
106 EXPORT_SYMBOL(fsl_get_sys_freq);
108 #if defined(CONFIG_CPM2) || defined(CONFIG_QUICC_ENGINE) || defined(CONFIG_8xx)
110 static u32 brgfreq = -1;
112 u32 get_brgfreq(void)
114 struct device_node *node;
115 const unsigned int *prop;
116 int size;
118 if (brgfreq != -1)
119 return brgfreq;
121 node = of_find_compatible_node(NULL, NULL, "fsl,cpm-brg");
122 if (node) {
123 prop = of_get_property(node, "clock-frequency", &size);
124 if (prop && size == 4)
125 brgfreq = *prop;
127 of_node_put(node);
128 return brgfreq;
131 /* Legacy device binding -- will go away when no users are left. */
132 node = of_find_node_by_type(NULL, "cpm");
133 if (!node)
134 node = of_find_compatible_node(NULL, NULL, "fsl,qe");
135 if (!node)
136 node = of_find_node_by_type(NULL, "qe");
138 if (node) {
139 prop = of_get_property(node, "brg-frequency", &size);
140 if (prop && size == 4)
141 brgfreq = *prop;
143 if (brgfreq == -1 || brgfreq == 0) {
144 prop = of_get_property(node, "bus-frequency", &size);
145 if (prop && size == 4)
146 brgfreq = *prop / 2;
148 of_node_put(node);
151 return brgfreq;
154 EXPORT_SYMBOL(get_brgfreq);
156 static u32 fs_baudrate = -1;
158 u32 get_baudrate(void)
160 struct device_node *node;
162 if (fs_baudrate != -1)
163 return fs_baudrate;
165 node = of_find_node_by_type(NULL, "serial");
166 if (node) {
167 int size;
168 const unsigned int *prop = of_get_property(node,
169 "current-speed", &size);
171 if (prop)
172 fs_baudrate = *prop;
173 of_node_put(node);
176 return fs_baudrate;
179 EXPORT_SYMBOL(get_baudrate);
180 #endif /* CONFIG_CPM2 */
182 #ifdef CONFIG_FIXED_PHY
183 static int __init of_add_fixed_phys(void)
185 int ret;
186 struct device_node *np;
187 u32 *fixed_link;
188 struct fixed_phy_status status = {};
190 for_each_node_by_name(np, "ethernet") {
191 fixed_link = (u32 *)of_get_property(np, "fixed-link", NULL);
192 if (!fixed_link)
193 continue;
195 status.link = 1;
196 status.duplex = fixed_link[1];
197 status.speed = fixed_link[2];
198 status.pause = fixed_link[3];
199 status.asym_pause = fixed_link[4];
201 ret = fixed_phy_add(PHY_POLL, fixed_link[0], &status);
202 if (ret) {
203 of_node_put(np);
204 return ret;
208 return 0;
210 arch_initcall(of_add_fixed_phys);
211 #endif /* CONFIG_FIXED_PHY */
213 #if defined(CONFIG_FSL_SOC_BOOKE) || defined(CONFIG_PPC_86xx)
214 static __be32 __iomem *rstcr;
216 static int __init setup_rstcr(void)
218 struct device_node *np;
220 for_each_node_by_name(np, "global-utilities") {
221 if ((of_get_property(np, "fsl,has-rstcr", NULL))) {
222 rstcr = of_iomap(np, 0) + 0xb0;
223 if (!rstcr)
224 printk (KERN_ERR "Error: reset control "
225 "register not mapped!\n");
226 break;
230 if (!rstcr && ppc_md.restart == fsl_rstcr_restart)
231 printk(KERN_ERR "No RSTCR register, warm reboot won't work\n");
233 if (np)
234 of_node_put(np);
236 return 0;
239 arch_initcall(setup_rstcr);
241 void fsl_rstcr_restart(char *cmd)
243 local_irq_disable();
244 if (rstcr)
245 /* set reset control register */
246 out_be32(rstcr, 0x2); /* HRESET_REQ */
248 while (1) ;
250 #endif
252 #if defined(CONFIG_FB_FSL_DIU) || defined(CONFIG_FB_FSL_DIU_MODULE)
253 struct platform_diu_data_ops diu_ops;
254 EXPORT_SYMBOL(diu_ops);
255 #endif
258 * Restart the current partition
260 * This function should be assigned to the ppc_md.restart function pointer,
261 * to initiate a partition restart when we're running under the Freescale
262 * hypervisor.
264 void fsl_hv_restart(char *cmd)
266 pr_info("hv restart\n");
267 fh_partition_restart(-1);
271 * Halt the current partition
273 * This function should be assigned to the ppc_md.power_off and ppc_md.halt
274 * function pointers, to shut down the partition when we're running under
275 * the Freescale hypervisor.
277 void fsl_hv_halt(void)
279 pr_info("hv exit\n");
280 fh_partition_stop(-1);