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