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_enet_pd.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_fcc_ioports(struct fs_platform_info*); 40 extern void init_fec_ioports(struct fs_platform_info*); 41 extern void init_smc_ioports(struct fs_uart_platform_info*); 42 static phys_addr_t immrbase = -1; 43 44 phys_addr_t get_immrbase(void) 45 { 46 struct device_node *soc; 47 48 if (immrbase != -1) 49 return immrbase; 50 51 soc = of_find_node_by_type(NULL, "soc"); 52 if (soc) { 53 struct resource res; 54 55 if (!of_range_to_resource(soc, 0, &res)) 56 immrbase = res.start; 57 58 of_node_put(soc); 59 } 60 61 return immrbase; 62 } 63 64 EXPORT_SYMBOL(get_immrbase); 65 66 u32 fsl_get_sys_freq(void) 67 { 68 static u32 sysfreq = -1; 69 struct device_node *soc; 70 71 if (sysfreq != -1) 72 return sysfreq; 73 74 soc = of_find_node_by_type(NULL, "soc"); 75 if (!soc) 76 return -1; 77 78 of_property_read_u32(soc, "clock-frequency", &sysfreq); 79 if (sysfreq == -1 || !sysfreq) 80 of_property_read_u32(soc, "bus-frequency", &sysfreq); 81 82 of_node_put(soc); 83 return sysfreq; 84 } 85 EXPORT_SYMBOL(fsl_get_sys_freq); 86 87 #if defined(CONFIG_CPM) || defined(CONFIG_QUICC_ENGINE) 88 89 u32 get_brgfreq(void) 90 { 91 static u32 brgfreq = -1; 92 struct device_node *node; 93 94 if (brgfreq != -1) 95 return brgfreq; 96 97 node = of_find_compatible_node(NULL, NULL, "fsl,cpm-brg"); 98 if (node) { 99 of_property_read_u32(node, "clock-frequency", &brgfreq); 100 of_node_put(node); 101 return brgfreq; 102 } 103 104 /* Legacy device binding -- will go away when no users are left. */ 105 node = of_find_node_by_type(NULL, "cpm"); 106 if (!node) 107 node = of_find_compatible_node(NULL, NULL, "fsl,qe"); 108 if (!node) 109 node = of_find_node_by_type(NULL, "qe"); 110 111 if (node) { 112 of_property_read_u32(node, "brg-frequency", &brgfreq); 113 if (brgfreq == -1 || !brgfreq) 114 if (!of_property_read_u32(node, "bus-frequency", 115 &brgfreq)) 116 brgfreq /= 2; 117 of_node_put(node); 118 } 119 120 return brgfreq; 121 } 122 123 EXPORT_SYMBOL(get_brgfreq); 124 125 u32 get_baudrate(void) 126 { 127 static u32 fs_baudrate = -1; 128 struct device_node *node; 129 130 if (fs_baudrate != -1) 131 return fs_baudrate; 132 133 node = of_find_node_by_type(NULL, "serial"); 134 if (node) { 135 of_property_read_u32(node, "current-speed", &fs_baudrate); 136 of_node_put(node); 137 } 138 139 return fs_baudrate; 140 } 141 142 EXPORT_SYMBOL(get_baudrate); 143 #endif /* CONFIG_CPM2 */ 144 145 #if defined(CONFIG_FSL_SOC_BOOKE) || defined(CONFIG_PPC_86xx) 146 static __be32 __iomem *rstcr; 147 148 static int fsl_rstcr_restart(struct notifier_block *this, 149 unsigned long mode, void *cmd) 150 { 151 local_irq_disable(); 152 /* set reset control register */ 153 out_be32(rstcr, 0x2); /* HRESET_REQ */ 154 155 return NOTIFY_DONE; 156 } 157 158 static int __init setup_rstcr(void) 159 { 160 struct device_node *np; 161 162 static struct notifier_block restart_handler = { 163 .notifier_call = fsl_rstcr_restart, 164 .priority = 128, 165 }; 166 167 for_each_node_by_name(np, "global-utilities") { 168 if (of_property_read_bool(np, "fsl,has-rstcr")) { 169 rstcr = of_iomap(np, 0) + 0xb0; 170 if (!rstcr) { 171 printk (KERN_ERR "Error: reset control " 172 "register not mapped!\n"); 173 } else { 174 register_restart_handler(&restart_handler); 175 } 176 break; 177 } 178 } 179 180 of_node_put(np); 181 182 return 0; 183 } 184 185 arch_initcall(setup_rstcr); 186 187 #endif 188 189 #if defined(CONFIG_FB_FSL_DIU) || defined(CONFIG_FB_FSL_DIU_MODULE) 190 struct platform_diu_data_ops diu_ops; 191 EXPORT_SYMBOL(diu_ops); 192 #endif 193 194 #ifdef CONFIG_EPAPR_PARAVIRT 195 /* 196 * Restart the current partition 197 * 198 * This function should be assigned to the ppc_md.restart function pointer, 199 * to initiate a partition restart when we're running under the Freescale 200 * hypervisor. 201 */ 202 void __noreturn fsl_hv_restart(char *cmd) 203 { 204 pr_info("hv restart\n"); 205 fh_partition_restart(-1); 206 while (1) ; 207 } 208 209 /* 210 * Halt the current partition 211 * 212 * This function should be assigned to the pm_power_off and ppc_md.halt 213 * function pointers, to shut down the partition when we're running under 214 * the Freescale hypervisor. 215 */ 216 void __noreturn fsl_hv_halt(void) 217 { 218 pr_info("hv exit\n"); 219 fh_partition_stop(-1); 220 while (1) ; 221 } 222 #endif 223