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 <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 */ 45 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; 50 51 phys_addr_t get_immrbase(void) 52 { 53 struct device_node *soc; 54 55 if (immrbase != -1) 56 return immrbase; 57 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); 63 64 if (prop && size == 4) 65 naddr = *prop; 66 else 67 naddr = 2; 68 69 prop = of_get_property(soc, "ranges", &size); 70 if (prop) 71 immrbase = of_translate_address(soc, prop + naddr); 72 73 of_node_put(soc); 74 } 75 76 return immrbase; 77 } 78 79 EXPORT_SYMBOL(get_immrbase); 80 81 static u32 sysfreq = -1; 82 83 u32 fsl_get_sys_freq(void) 84 { 85 struct device_node *soc; 86 const u32 *prop; 87 int size; 88 89 if (sysfreq != -1) 90 return sysfreq; 91 92 soc = of_find_node_by_type(NULL, "soc"); 93 if (!soc) 94 return -1; 95 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); 99 100 if (prop && size == sizeof(*prop)) 101 sysfreq = *prop; 102 103 of_node_put(soc); 104 return sysfreq; 105 } 106 EXPORT_SYMBOL(fsl_get_sys_freq); 107 108 #if defined(CONFIG_CPM2) || defined(CONFIG_QUICC_ENGINE) || defined(CONFIG_8xx) 109 110 static u32 brgfreq = -1; 111 112 u32 get_brgfreq(void) 113 { 114 struct device_node *node; 115 const unsigned int *prop; 116 int size; 117 118 if (brgfreq != -1) 119 return brgfreq; 120 121 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; 126 127 of_node_put(node); 128 return brgfreq; 129 } 130 131 /* 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"); 137 138 if (node) { 139 prop = of_get_property(node, "brg-frequency", &size); 140 if (prop && size == 4) 141 brgfreq = *prop; 142 143 if (brgfreq == -1 || brgfreq == 0) { 144 prop = of_get_property(node, "bus-frequency", &size); 145 if (prop && size == 4) 146 brgfreq = *prop / 2; 147 } 148 of_node_put(node); 149 } 150 151 return brgfreq; 152 } 153 154 EXPORT_SYMBOL(get_brgfreq); 155 156 static u32 fs_baudrate = -1; 157 158 u32 get_baudrate(void) 159 { 160 struct device_node *node; 161 162 if (fs_baudrate != -1) 163 return fs_baudrate; 164 165 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); 170 171 if (prop) 172 fs_baudrate = *prop; 173 of_node_put(node); 174 } 175 176 return fs_baudrate; 177 } 178 179 EXPORT_SYMBOL(get_baudrate); 180 #endif /* CONFIG_CPM2 */ 181 182 #ifdef CONFIG_FIXED_PHY 183 static int __init of_add_fixed_phys(void) 184 { 185 int ret; 186 struct device_node *np; 187 u32 *fixed_link; 188 struct fixed_phy_status status = {}; 189 190 for_each_node_by_name(np, "ethernet") { 191 fixed_link = (u32 *)of_get_property(np, "fixed-link", NULL); 192 if (!fixed_link) 193 continue; 194 195 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]; 200 201 ret = fixed_phy_add(PHY_POLL, fixed_link[0], &status); 202 if (ret) { 203 of_node_put(np); 204 return ret; 205 } 206 } 207 208 return 0; 209 } 210 arch_initcall(of_add_fixed_phys); 211 #endif /* CONFIG_FIXED_PHY */ 212 213 #if defined(CONFIG_FSL_SOC_BOOKE) || defined(CONFIG_PPC_86xx) 214 static __be32 __iomem *rstcr; 215 216 static int __init setup_rstcr(void) 217 { 218 struct device_node *np; 219 220 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; 227 } 228 } 229 230 if (!rstcr && ppc_md.restart == fsl_rstcr_restart) 231 printk(KERN_ERR "No RSTCR register, warm reboot won't work\n"); 232 233 if (np) 234 of_node_put(np); 235 236 return 0; 237 } 238 239 arch_initcall(setup_rstcr); 240 241 void fsl_rstcr_restart(char *cmd) 242 { 243 local_irq_disable(); 244 if (rstcr) 245 /* set reset control register */ 246 out_be32(rstcr, 0x2); /* HRESET_REQ */ 247 248 while (1) ; 249 } 250 #endif 251 252 #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 256 257 /* 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