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 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 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; 110 111 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; 156 157 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 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; 214 215 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); 239 240 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 #ifdef CONFIG_EPAPR_PARAVIRT 257 /* 258 * Restart the current partition 259 * 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. 263 */ 264 void fsl_hv_restart(char *cmd) 265 { 266 pr_info("hv restart\n"); 267 fh_partition_restart(-1); 268 } 269 270 /* 271 * Halt the current partition 272 * 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. 276 */ 277 void fsl_hv_halt(void) 278 { 279 pr_info("hv exit\n"); 280 fh_partition_stop(-1); 281 } 282 #endif 283