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