1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * FSL SoC setup code 4 * 5 * Maintained by Kumar Gala (see MAINTAINERS for contact information) 6 * 7 * 2006 (c) MontaVista Software, Inc. 8 * Vitaly Bordug <vbordug@ru.mvista.com> 9 */ 10 11 #include <linux/stddef.h> 12 #include <linux/kernel.h> 13 #include <linux/init.h> 14 #include <linux/errno.h> 15 #include <linux/major.h> 16 #include <linux/delay.h> 17 #include <linux/irq.h> 18 #include <linux/export.h> 19 #include <linux/device.h> 20 #include <linux/platform_device.h> 21 #include <linux/of.h> 22 #include <linux/of_platform.h> 23 #include <linux/phy.h> 24 #include <linux/spi/spi.h> 25 #include <linux/fsl_devices.h> 26 #include <linux/fs_enet_pd.h> 27 #include <linux/fs_uart_pd.h> 28 #include <linux/reboot.h> 29 30 #include <linux/atomic.h> 31 #include <asm/io.h> 32 #include <asm/irq.h> 33 #include <asm/time.h> 34 #include <asm/prom.h> 35 #include <asm/machdep.h> 36 #include <sysdev/fsl_soc.h> 37 #include <mm/mmu_decl.h> 38 #include <asm/cpm2.h> 39 #include <asm/fsl_hcalls.h> /* For the Freescale hypervisor */ 40 41 extern void init_fcc_ioports(struct fs_platform_info*); 42 extern void init_fec_ioports(struct fs_platform_info*); 43 extern void init_smc_ioports(struct fs_uart_platform_info*); 44 static phys_addr_t immrbase = -1; 45 46 phys_addr_t get_immrbase(void) 47 { 48 struct device_node *soc; 49 50 if (immrbase != -1) 51 return immrbase; 52 53 soc = of_find_node_by_type(NULL, "soc"); 54 if (soc) { 55 int size; 56 u32 naddr; 57 const __be32 *prop = of_get_property(soc, "#address-cells", &size); 58 59 if (prop && size == 4) 60 naddr = be32_to_cpup(prop); 61 else 62 naddr = 2; 63 64 prop = of_get_property(soc, "ranges", &size); 65 if (prop) 66 immrbase = of_translate_address(soc, prop + naddr); 67 68 of_node_put(soc); 69 } 70 71 return immrbase; 72 } 73 74 EXPORT_SYMBOL(get_immrbase); 75 76 u32 fsl_get_sys_freq(void) 77 { 78 static u32 sysfreq = -1; 79 struct device_node *soc; 80 81 if (sysfreq != -1) 82 return sysfreq; 83 84 soc = of_find_node_by_type(NULL, "soc"); 85 if (!soc) 86 return -1; 87 88 of_property_read_u32(soc, "clock-frequency", &sysfreq); 89 if (sysfreq == -1 || !sysfreq) 90 of_property_read_u32(soc, "bus-frequency", &sysfreq); 91 92 of_node_put(soc); 93 return sysfreq; 94 } 95 EXPORT_SYMBOL(fsl_get_sys_freq); 96 97 #if defined(CONFIG_CPM) || defined(CONFIG_QUICC_ENGINE) 98 99 u32 get_brgfreq(void) 100 { 101 static u32 brgfreq = -1; 102 struct device_node *node; 103 104 if (brgfreq != -1) 105 return brgfreq; 106 107 node = of_find_compatible_node(NULL, NULL, "fsl,cpm-brg"); 108 if (node) { 109 of_property_read_u32(node, "clock-frequency", &brgfreq); 110 of_node_put(node); 111 return brgfreq; 112 } 113 114 /* Legacy device binding -- will go away when no users are left. */ 115 node = of_find_node_by_type(NULL, "cpm"); 116 if (!node) 117 node = of_find_compatible_node(NULL, NULL, "fsl,qe"); 118 if (!node) 119 node = of_find_node_by_type(NULL, "qe"); 120 121 if (node) { 122 of_property_read_u32(node, "brg-frequency", &brgfreq); 123 if (brgfreq == -1 || !brgfreq) 124 if (!of_property_read_u32(node, "bus-frequency", 125 &brgfreq)) 126 brgfreq /= 2; 127 of_node_put(node); 128 } 129 130 return brgfreq; 131 } 132 133 EXPORT_SYMBOL(get_brgfreq); 134 135 u32 get_baudrate(void) 136 { 137 static u32 fs_baudrate = -1; 138 struct device_node *node; 139 140 if (fs_baudrate != -1) 141 return fs_baudrate; 142 143 node = of_find_node_by_type(NULL, "serial"); 144 if (node) { 145 of_property_read_u32(node, "current-speed", &fs_baudrate); 146 of_node_put(node); 147 } 148 149 return fs_baudrate; 150 } 151 152 EXPORT_SYMBOL(get_baudrate); 153 #endif /* CONFIG_CPM2 */ 154 155 #if defined(CONFIG_FSL_SOC_BOOKE) || defined(CONFIG_PPC_86xx) 156 static __be32 __iomem *rstcr; 157 158 static int fsl_rstcr_restart(struct notifier_block *this, 159 unsigned long mode, void *cmd) 160 { 161 local_irq_disable(); 162 /* set reset control register */ 163 out_be32(rstcr, 0x2); /* HRESET_REQ */ 164 165 return NOTIFY_DONE; 166 } 167 168 static int __init setup_rstcr(void) 169 { 170 struct device_node *np; 171 172 static struct notifier_block restart_handler = { 173 .notifier_call = fsl_rstcr_restart, 174 .priority = 128, 175 }; 176 177 for_each_node_by_name(np, "global-utilities") { 178 if ((of_get_property(np, "fsl,has-rstcr", NULL))) { 179 rstcr = of_iomap(np, 0) + 0xb0; 180 if (!rstcr) { 181 printk (KERN_ERR "Error: reset control " 182 "register not mapped!\n"); 183 } else { 184 register_restart_handler(&restart_handler); 185 } 186 break; 187 } 188 } 189 190 of_node_put(np); 191 192 return 0; 193 } 194 195 arch_initcall(setup_rstcr); 196 197 #endif 198 199 #if defined(CONFIG_FB_FSL_DIU) || defined(CONFIG_FB_FSL_DIU_MODULE) 200 struct platform_diu_data_ops diu_ops; 201 EXPORT_SYMBOL(diu_ops); 202 #endif 203 204 #ifdef CONFIG_EPAPR_PARAVIRT 205 /* 206 * Restart the current partition 207 * 208 * This function should be assigned to the ppc_md.restart function pointer, 209 * to initiate a partition restart when we're running under the Freescale 210 * hypervisor. 211 */ 212 void __noreturn fsl_hv_restart(char *cmd) 213 { 214 pr_info("hv restart\n"); 215 fh_partition_restart(-1); 216 while (1) ; 217 } 218 219 /* 220 * Halt the current partition 221 * 222 * This function should be assigned to the pm_power_off and ppc_md.halt 223 * function pointers, to shut down the partition when we're running under 224 * the Freescale hypervisor. 225 */ 226 void __noreturn fsl_hv_halt(void) 227 { 228 pr_info("hv exit\n"); 229 fh_partition_stop(-1); 230 while (1) ; 231 } 232 #endif 233