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 33 #include <linux/atomic.h> 34 #include <asm/io.h> 35 #include <asm/irq.h> 36 #include <asm/time.h> 37 #include <asm/prom.h> 38 #include <asm/machdep.h> 39 #include <sysdev/fsl_soc.h> 40 #include <mm/mmu_decl.h> 41 #include <asm/cpm2.h> 42 #include <asm/fsl_hcalls.h> /* For the Freescale hypervisor */ 43 44 extern void init_fcc_ioports(struct fs_platform_info*); 45 extern void init_fec_ioports(struct fs_platform_info*); 46 extern void init_smc_ioports(struct fs_uart_platform_info*); 47 static phys_addr_t immrbase = -1; 48 49 phys_addr_t get_immrbase(void) 50 { 51 struct device_node *soc; 52 53 if (immrbase != -1) 54 return immrbase; 55 56 soc = of_find_node_by_type(NULL, "soc"); 57 if (soc) { 58 int size; 59 u32 naddr; 60 const __be32 *prop = of_get_property(soc, "#address-cells", &size); 61 62 if (prop && size == 4) 63 naddr = be32_to_cpup(prop); 64 else 65 naddr = 2; 66 67 prop = of_get_property(soc, "ranges", &size); 68 if (prop) 69 immrbase = of_translate_address(soc, prop + naddr); 70 71 of_node_put(soc); 72 } 73 74 return immrbase; 75 } 76 77 EXPORT_SYMBOL(get_immrbase); 78 79 static u32 sysfreq = -1; 80 81 u32 fsl_get_sys_freq(void) 82 { 83 struct device_node *soc; 84 const u32 *prop; 85 int size; 86 87 if (sysfreq != -1) 88 return sysfreq; 89 90 soc = of_find_node_by_type(NULL, "soc"); 91 if (!soc) 92 return -1; 93 94 prop = of_get_property(soc, "clock-frequency", &size); 95 if (!prop || size != sizeof(*prop) || *prop == 0) 96 prop = of_get_property(soc, "bus-frequency", &size); 97 98 if (prop && size == sizeof(*prop)) 99 sysfreq = *prop; 100 101 of_node_put(soc); 102 return sysfreq; 103 } 104 EXPORT_SYMBOL(fsl_get_sys_freq); 105 106 #if defined(CONFIG_CPM2) || defined(CONFIG_QUICC_ENGINE) || defined(CONFIG_8xx) 107 108 static u32 brgfreq = -1; 109 110 u32 get_brgfreq(void) 111 { 112 struct device_node *node; 113 const unsigned int *prop; 114 int size; 115 116 if (brgfreq != -1) 117 return brgfreq; 118 119 node = of_find_compatible_node(NULL, NULL, "fsl,cpm-brg"); 120 if (node) { 121 prop = of_get_property(node, "clock-frequency", &size); 122 if (prop && size == 4) 123 brgfreq = *prop; 124 125 of_node_put(node); 126 return brgfreq; 127 } 128 129 /* Legacy device binding -- will go away when no users are left. */ 130 node = of_find_node_by_type(NULL, "cpm"); 131 if (!node) 132 node = of_find_compatible_node(NULL, NULL, "fsl,qe"); 133 if (!node) 134 node = of_find_node_by_type(NULL, "qe"); 135 136 if (node) { 137 prop = of_get_property(node, "brg-frequency", &size); 138 if (prop && size == 4) 139 brgfreq = *prop; 140 141 if (brgfreq == -1 || brgfreq == 0) { 142 prop = of_get_property(node, "bus-frequency", &size); 143 if (prop && size == 4) 144 brgfreq = *prop / 2; 145 } 146 of_node_put(node); 147 } 148 149 return brgfreq; 150 } 151 152 EXPORT_SYMBOL(get_brgfreq); 153 154 static u32 fs_baudrate = -1; 155 156 u32 get_baudrate(void) 157 { 158 struct device_node *node; 159 160 if (fs_baudrate != -1) 161 return fs_baudrate; 162 163 node = of_find_node_by_type(NULL, "serial"); 164 if (node) { 165 int size; 166 const unsigned int *prop = of_get_property(node, 167 "current-speed", &size); 168 169 if (prop) 170 fs_baudrate = *prop; 171 of_node_put(node); 172 } 173 174 return fs_baudrate; 175 } 176 177 EXPORT_SYMBOL(get_baudrate); 178 #endif /* CONFIG_CPM2 */ 179 180 #if defined(CONFIG_FSL_SOC_BOOKE) || defined(CONFIG_PPC_86xx) 181 static __be32 __iomem *rstcr; 182 183 static int __init setup_rstcr(void) 184 { 185 struct device_node *np; 186 187 for_each_node_by_name(np, "global-utilities") { 188 if ((of_get_property(np, "fsl,has-rstcr", NULL))) { 189 rstcr = of_iomap(np, 0) + 0xb0; 190 if (!rstcr) 191 printk (KERN_ERR "Error: reset control " 192 "register not mapped!\n"); 193 break; 194 } 195 } 196 197 if (!rstcr && ppc_md.restart == fsl_rstcr_restart) 198 printk(KERN_ERR "No RSTCR register, warm reboot won't work\n"); 199 200 of_node_put(np); 201 202 return 0; 203 } 204 205 arch_initcall(setup_rstcr); 206 207 void fsl_rstcr_restart(char *cmd) 208 { 209 local_irq_disable(); 210 if (rstcr) 211 /* set reset control register */ 212 out_be32(rstcr, 0x2); /* HRESET_REQ */ 213 214 while (1) ; 215 } 216 #endif 217 218 #if defined(CONFIG_FB_FSL_DIU) || defined(CONFIG_FB_FSL_DIU_MODULE) 219 struct platform_diu_data_ops diu_ops; 220 EXPORT_SYMBOL(diu_ops); 221 #endif 222 223 #ifdef CONFIG_EPAPR_PARAVIRT 224 /* 225 * Restart the current partition 226 * 227 * This function should be assigned to the ppc_md.restart function pointer, 228 * to initiate a partition restart when we're running under the Freescale 229 * hypervisor. 230 */ 231 void fsl_hv_restart(char *cmd) 232 { 233 pr_info("hv restart\n"); 234 fh_partition_restart(-1); 235 } 236 237 /* 238 * Halt the current partition 239 * 240 * This function should be assigned to the pm_power_off and ppc_md.halt 241 * function pointers, to shut down the partition when we're running under 242 * the Freescale hypervisor. 243 */ 244 void fsl_hv_halt(void) 245 { 246 pr_info("hv exit\n"); 247 fh_partition_stop(-1); 248 } 249 #endif 250