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_uart_pd.h> 27 #include <linux/reboot.h> 28 29 #include <linux/atomic.h> 30 #include <asm/io.h> 31 #include <asm/irq.h> 32 #include <asm/time.h> 33 #include <asm/machdep.h> 34 #include <sysdev/fsl_soc.h> 35 #include <mm/mmu_decl.h> 36 #include <asm/cpm2.h> 37 #include <asm/fsl_hcalls.h> /* For the Freescale hypervisor */ 38 39 extern void init_smc_ioports(struct fs_uart_platform_info*); 40 static phys_addr_t immrbase = -1; 41 42 phys_addr_t get_immrbase(void) 43 { 44 struct device_node *soc; 45 46 if (immrbase != -1) 47 return immrbase; 48 49 soc = of_find_node_by_type(NULL, "soc"); 50 if (soc) { 51 struct resource res; 52 53 if (!of_range_to_resource(soc, 0, &res)) 54 immrbase = res.start; 55 56 of_node_put(soc); 57 } 58 59 return immrbase; 60 } 61 62 EXPORT_SYMBOL(get_immrbase); 63 64 u32 fsl_get_sys_freq(void) 65 { 66 static u32 sysfreq = -1; 67 struct device_node *soc; 68 69 if (sysfreq != -1) 70 return sysfreq; 71 72 soc = of_find_node_by_type(NULL, "soc"); 73 if (!soc) 74 return -1; 75 76 of_property_read_u32(soc, "clock-frequency", &sysfreq); 77 if (sysfreq == -1 || !sysfreq) 78 of_property_read_u32(soc, "bus-frequency", &sysfreq); 79 80 of_node_put(soc); 81 return sysfreq; 82 } 83 EXPORT_SYMBOL(fsl_get_sys_freq); 84 85 #if defined(CONFIG_CPM) || defined(CONFIG_QUICC_ENGINE) 86 87 u32 get_brgfreq(void) 88 { 89 static u32 brgfreq = -1; 90 struct device_node *node; 91 92 if (brgfreq != -1) 93 return brgfreq; 94 95 node = of_find_compatible_node(NULL, NULL, "fsl,cpm-brg"); 96 if (node) { 97 of_property_read_u32(node, "clock-frequency", &brgfreq); 98 of_node_put(node); 99 return brgfreq; 100 } 101 102 /* Legacy device binding -- will go away when no users are left. */ 103 node = of_find_node_by_type(NULL, "cpm"); 104 if (!node) 105 node = of_find_compatible_node(NULL, NULL, "fsl,qe"); 106 if (!node) 107 node = of_find_node_by_type(NULL, "qe"); 108 109 if (node) { 110 of_property_read_u32(node, "brg-frequency", &brgfreq); 111 if (brgfreq == -1 || !brgfreq) 112 if (!of_property_read_u32(node, "bus-frequency", 113 &brgfreq)) 114 brgfreq /= 2; 115 of_node_put(node); 116 } 117 118 return brgfreq; 119 } 120 121 EXPORT_SYMBOL(get_brgfreq); 122 123 u32 get_baudrate(void) 124 { 125 static u32 fs_baudrate = -1; 126 struct device_node *node; 127 128 if (fs_baudrate != -1) 129 return fs_baudrate; 130 131 node = of_find_node_by_type(NULL, "serial"); 132 if (node) { 133 of_property_read_u32(node, "current-speed", &fs_baudrate); 134 of_node_put(node); 135 } 136 137 return fs_baudrate; 138 } 139 140 EXPORT_SYMBOL(get_baudrate); 141 #endif /* CONFIG_CPM2 */ 142 143 #if defined(CONFIG_FSL_SOC_BOOKE) || defined(CONFIG_PPC_86xx) 144 static __be32 __iomem *rstcr; 145 146 static int fsl_rstcr_restart(struct notifier_block *this, 147 unsigned long mode, void *cmd) 148 { 149 local_irq_disable(); 150 /* set reset control register */ 151 out_be32(rstcr, 0x2); /* HRESET_REQ */ 152 153 return NOTIFY_DONE; 154 } 155 156 static int __init setup_rstcr(void) 157 { 158 struct device_node *np; 159 160 static struct notifier_block restart_handler = { 161 .notifier_call = fsl_rstcr_restart, 162 .priority = 128, 163 }; 164 165 for_each_node_by_name(np, "global-utilities") { 166 if (of_property_read_bool(np, "fsl,has-rstcr")) { 167 rstcr = of_iomap(np, 0) + 0xb0; 168 if (!rstcr) { 169 printk (KERN_ERR "Error: reset control " 170 "register not mapped!\n"); 171 } else { 172 register_restart_handler(&restart_handler); 173 } 174 break; 175 } 176 } 177 178 of_node_put(np); 179 180 return 0; 181 } 182 183 arch_initcall(setup_rstcr); 184 185 #endif 186 187 #if defined(CONFIG_FB_FSL_DIU) || defined(CONFIG_FB_FSL_DIU_MODULE) 188 struct platform_diu_data_ops diu_ops; 189 EXPORT_SYMBOL(diu_ops); 190 #endif 191 192 #ifdef CONFIG_EPAPR_PARAVIRT 193 /* 194 * Restart the current partition 195 * 196 * This function should be assigned to the ppc_md.restart function pointer, 197 * to initiate a partition restart when we're running under the Freescale 198 * hypervisor. 199 */ 200 void __noreturn fsl_hv_restart(char *cmd) 201 { 202 pr_info("hv restart\n"); 203 fh_partition_restart(-1); 204 while (1) ; 205 } 206 207 /* 208 * Halt the current partition 209 * 210 * This function should be assigned to the pm_power_off and ppc_md.halt 211 * function pointers, to shut down the partition when we're running under 212 * the Freescale hypervisor. 213 */ 214 void __noreturn fsl_hv_halt(void) 215 { 216 pr_info("hv exit\n"); 217 fh_partition_stop(-1); 218 while (1) ; 219 } 220 #endif 221