1 /* 2 * Based on MPC8560 ADS and arch/ppc tqm85xx ports 3 * 4 * Maintained by Kumar Gala (see MAINTAINERS for contact information) 5 * 6 * Copyright 2008 Freescale Semiconductor Inc. 7 * 8 * Copyright (c) 2005-2006 DENX Software Engineering 9 * Stefan Roese <sr@denx.de> 10 * 11 * Based on original work by 12 * Kumar Gala <kumar.gala@freescale.com> 13 * Copyright 2004 Freescale Semiconductor Inc. 14 * 15 * This program is free software; you can redistribute it and/or modify it 16 * under the terms of the GNU General Public License as published by the 17 * Free Software Foundation; either version 2 of the License, or (at your 18 * option) any later version. 19 */ 20 21 #include <linux/stddef.h> 22 #include <linux/kernel.h> 23 #include <linux/pci.h> 24 #include <linux/kdev_t.h> 25 #include <linux/delay.h> 26 #include <linux/seq_file.h> 27 #include <linux/of_platform.h> 28 29 #include <asm/system.h> 30 #include <asm/time.h> 31 #include <asm/machdep.h> 32 #include <asm/pci-bridge.h> 33 #include <asm/mpic.h> 34 #include <asm/prom.h> 35 #include <mm/mmu_decl.h> 36 #include <asm/udbg.h> 37 38 #include <sysdev/fsl_soc.h> 39 #include <sysdev/fsl_pci.h> 40 41 #ifdef CONFIG_CPM2 42 #include <asm/cpm2.h> 43 #include <sysdev/cpm2_pic.h> 44 45 static void cpm2_cascade(unsigned int irq, struct irq_desc *desc) 46 { 47 int cascade_irq; 48 49 while ((cascade_irq = cpm2_get_irq()) >= 0) 50 generic_handle_irq(cascade_irq); 51 52 desc->chip->eoi(irq); 53 } 54 #endif /* CONFIG_CPM2 */ 55 56 static void __init tqm85xx_pic_init(void) 57 { 58 struct mpic *mpic; 59 struct resource r; 60 struct device_node *np; 61 #ifdef CONFIG_CPM2 62 int irq; 63 #endif 64 65 np = of_find_node_by_type(NULL, "open-pic"); 66 if (!np) { 67 printk(KERN_ERR "Could not find open-pic node\n"); 68 return; 69 } 70 71 if (of_address_to_resource(np, 0, &r)) { 72 printk(KERN_ERR "Could not map mpic register space\n"); 73 of_node_put(np); 74 return; 75 } 76 77 mpic = mpic_alloc(np, r.start, 78 MPIC_PRIMARY | MPIC_WANTS_RESET | MPIC_BIG_ENDIAN, 79 0, 256, " OpenPIC "); 80 BUG_ON(mpic == NULL); 81 of_node_put(np); 82 83 mpic_init(mpic); 84 85 #ifdef CONFIG_CPM2 86 /* Setup CPM2 PIC */ 87 np = of_find_compatible_node(NULL, NULL, "fsl,cpm2-pic"); 88 if (np == NULL) { 89 printk(KERN_ERR "PIC init: can not find fsl,cpm2-pic node\n"); 90 return; 91 } 92 irq = irq_of_parse_and_map(np, 0); 93 94 if (irq == NO_IRQ) { 95 of_node_put(np); 96 printk(KERN_ERR "PIC init: got no IRQ for cpm cascade\n"); 97 return; 98 } 99 100 cpm2_pic_init(np); 101 of_node_put(np); 102 set_irq_chained_handler(irq, cpm2_cascade); 103 #endif 104 } 105 106 /* 107 * Setup the architecture 108 */ 109 static void __init tqm85xx_setup_arch(void) 110 { 111 #ifdef CONFIG_PCI 112 struct device_node *np; 113 #endif 114 115 if (ppc_md.progress) 116 ppc_md.progress("tqm85xx_setup_arch()", 0); 117 118 #ifdef CONFIG_CPM2 119 cpm2_reset(); 120 #endif 121 122 #ifdef CONFIG_PCI 123 for_each_compatible_node(np, "pci", "fsl,mpc8540-pci") 124 fsl_add_bridge(np, 1); 125 #endif 126 } 127 128 static void tqm85xx_show_cpuinfo(struct seq_file *m) 129 { 130 uint pvid, svid, phid1; 131 uint memsize = total_memory; 132 133 pvid = mfspr(SPRN_PVR); 134 svid = mfspr(SPRN_SVR); 135 136 seq_printf(m, "Vendor\t\t: TQ Components\n"); 137 seq_printf(m, "PVR\t\t: 0x%x\n", pvid); 138 seq_printf(m, "SVR\t\t: 0x%x\n", svid); 139 140 /* Display cpu Pll setting */ 141 phid1 = mfspr(SPRN_HID1); 142 seq_printf(m, "PLL setting\t: 0x%x\n", ((phid1 >> 24) & 0x3f)); 143 144 /* Display the amount of memory */ 145 seq_printf(m, "Memory\t\t: %d MB\n", memsize / (1024 * 1024)); 146 } 147 148 static struct of_device_id __initdata of_bus_ids[] = { 149 { .compatible = "simple-bus", }, 150 {}, 151 }; 152 153 static int __init declare_of_platform_devices(void) 154 { 155 of_platform_bus_probe(NULL, of_bus_ids, NULL); 156 157 return 0; 158 } 159 machine_device_initcall(tqm85xx, declare_of_platform_devices); 160 161 /* 162 * Called very early, device-tree isn't unflattened 163 */ 164 static int __init tqm85xx_probe(void) 165 { 166 unsigned long root = of_get_flat_dt_root(); 167 168 if ((of_flat_dt_is_compatible(root, "tqm,8540")) || 169 (of_flat_dt_is_compatible(root, "tqm,8541")) || 170 (of_flat_dt_is_compatible(root, "tqm,8555")) || 171 (of_flat_dt_is_compatible(root, "tqm,8560"))) 172 return 1; 173 174 return 0; 175 } 176 177 define_machine(tqm85xx) { 178 .name = "TQM85xx", 179 .probe = tqm85xx_probe, 180 .setup_arch = tqm85xx_setup_arch, 181 .init_IRQ = tqm85xx_pic_init, 182 .show_cpuinfo = tqm85xx_show_cpuinfo, 183 .get_irq = mpic_get_irq, 184 .restart = fsl_rstcr_restart, 185 .calibrate_decr = generic_calibrate_decr, 186 .progress = udbg_progress, 187 }; 188