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/spi/spi.h> 29 #include <linux/fsl_devices.h> 30 #include <linux/fs_enet_pd.h> 31 #include <linux/fs_uart_pd.h> 32 #include <linux/reboot.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 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 __be32 *prop = of_get_property(soc, "#address-cells", &size); 62 63 if (prop && size == 4) 64 naddr = be32_to_cpup(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 u32 fsl_get_sys_freq(void) 81 { 82 static u32 sysfreq = -1; 83 struct device_node *soc; 84 85 if (sysfreq != -1) 86 return sysfreq; 87 88 soc = of_find_node_by_type(NULL, "soc"); 89 if (!soc) 90 return -1; 91 92 of_property_read_u32(soc, "clock-frequency", &sysfreq); 93 if (sysfreq == -1 || !sysfreq) 94 of_property_read_u32(soc, "bus-frequency", &sysfreq); 95 96 of_node_put(soc); 97 return sysfreq; 98 } 99 EXPORT_SYMBOL(fsl_get_sys_freq); 100 101 #if defined(CONFIG_CPM) || defined(CONFIG_QUICC_ENGINE) 102 103 u32 get_brgfreq(void) 104 { 105 static u32 brgfreq = -1; 106 struct device_node *node; 107 108 if (brgfreq != -1) 109 return brgfreq; 110 111 node = of_find_compatible_node(NULL, NULL, "fsl,cpm-brg"); 112 if (node) { 113 of_property_read_u32(node, "clock-frequency", &brgfreq); 114 of_node_put(node); 115 return brgfreq; 116 } 117 118 /* Legacy device binding -- will go away when no users are left. */ 119 node = of_find_node_by_type(NULL, "cpm"); 120 if (!node) 121 node = of_find_compatible_node(NULL, NULL, "fsl,qe"); 122 if (!node) 123 node = of_find_node_by_type(NULL, "qe"); 124 125 if (node) { 126 of_property_read_u32(node, "brg-frequency", &brgfreq); 127 if (brgfreq == -1 || !brgfreq) 128 if (!of_property_read_u32(node, "bus-frequency", 129 &brgfreq)) 130 brgfreq /= 2; 131 of_node_put(node); 132 } 133 134 return brgfreq; 135 } 136 137 EXPORT_SYMBOL(get_brgfreq); 138 139 u32 get_baudrate(void) 140 { 141 static u32 fs_baudrate = -1; 142 struct device_node *node; 143 144 if (fs_baudrate != -1) 145 return fs_baudrate; 146 147 node = of_find_node_by_type(NULL, "serial"); 148 if (node) { 149 of_property_read_u32(node, "current-speed", &fs_baudrate); 150 of_node_put(node); 151 } 152 153 return fs_baudrate; 154 } 155 156 EXPORT_SYMBOL(get_baudrate); 157 #endif /* CONFIG_CPM2 */ 158 159 #if defined(CONFIG_FSL_SOC_BOOKE) || defined(CONFIG_PPC_86xx) 160 static __be32 __iomem *rstcr; 161 162 static int fsl_rstcr_restart(struct notifier_block *this, 163 unsigned long mode, void *cmd) 164 { 165 local_irq_disable(); 166 /* set reset control register */ 167 out_be32(rstcr, 0x2); /* HRESET_REQ */ 168 169 return NOTIFY_DONE; 170 } 171 172 static int __init setup_rstcr(void) 173 { 174 struct device_node *np; 175 176 static struct notifier_block restart_handler = { 177 .notifier_call = fsl_rstcr_restart, 178 .priority = 128, 179 }; 180 181 for_each_node_by_name(np, "global-utilities") { 182 if ((of_get_property(np, "fsl,has-rstcr", NULL))) { 183 rstcr = of_iomap(np, 0) + 0xb0; 184 if (!rstcr) { 185 printk (KERN_ERR "Error: reset control " 186 "register not mapped!\n"); 187 } else { 188 register_restart_handler(&restart_handler); 189 } 190 break; 191 } 192 } 193 194 of_node_put(np); 195 196 return 0; 197 } 198 199 arch_initcall(setup_rstcr); 200 201 #endif 202 203 #if defined(CONFIG_FB_FSL_DIU) || defined(CONFIG_FB_FSL_DIU_MODULE) 204 struct platform_diu_data_ops diu_ops; 205 EXPORT_SYMBOL(diu_ops); 206 #endif 207 208 #ifdef CONFIG_EPAPR_PARAVIRT 209 /* 210 * Restart the current partition 211 * 212 * This function should be assigned to the ppc_md.restart function pointer, 213 * to initiate a partition restart when we're running under the Freescale 214 * hypervisor. 215 */ 216 void __noreturn fsl_hv_restart(char *cmd) 217 { 218 pr_info("hv restart\n"); 219 fh_partition_restart(-1); 220 while (1) ; 221 } 222 223 /* 224 * Halt the current partition 225 * 226 * This function should be assigned to the pm_power_off and ppc_md.halt 227 * function pointers, to shut down the partition when we're running under 228 * the Freescale hypervisor. 229 */ 230 void __noreturn fsl_hv_halt(void) 231 { 232 pr_info("hv exit\n"); 233 fh_partition_stop(-1); 234 while (1) ; 235 } 236 #endif 237