Zang Roy-r61911 | c5d5633 | 2006-06-13 15:07:15 +0800 | [diff] [blame] | 1 | /* |
| 2 | * mpc7448_hpc2.c |
| 3 | * |
Zang Roy-r61911 | c4342ff | 2006-08-23 10:19:50 +0800 | [diff] [blame^] | 4 | * Board setup routines for the Freescale mpc7448hpc2(taiga) platform |
Zang Roy-r61911 | c5d5633 | 2006-06-13 15:07:15 +0800 | [diff] [blame] | 5 | * |
| 6 | * Author: Jacob Pan |
| 7 | * jacob.pan@freescale.com |
| 8 | * Author: Xianghua Xiao |
| 9 | * x.xiao@freescale.com |
| 10 | * Maintainer: Roy Zang <tie-fei.zang@freescale.com> |
| 11 | * Add Flat Device Tree support fot mpc7448hpc2 board |
| 12 | * |
| 13 | * Copyright 2004-2006 Freescale Semiconductor, Inc. |
| 14 | * |
Zang Roy-r61911 | c4342ff | 2006-08-23 10:19:50 +0800 | [diff] [blame^] | 15 | * This program is free software; you can redistribute it and/or |
| 16 | * modify it under the terms of the GNU General Public License |
| 17 | * as published by the Free Software Foundation; either version |
| 18 | * 2 of the License, or (at your option) any later version. |
Zang Roy-r61911 | c5d5633 | 2006-06-13 15:07:15 +0800 | [diff] [blame] | 19 | */ |
| 20 | |
| 21 | #include <linux/config.h> |
| 22 | #include <linux/stddef.h> |
| 23 | #include <linux/kernel.h> |
| 24 | #include <linux/pci.h> |
| 25 | #include <linux/kdev_t.h> |
| 26 | #include <linux/console.h> |
| 27 | #include <linux/delay.h> |
| 28 | #include <linux/irq.h> |
| 29 | #include <linux/ide.h> |
| 30 | #include <linux/seq_file.h> |
| 31 | #include <linux/root_dev.h> |
| 32 | #include <linux/serial.h> |
| 33 | #include <linux/tty.h> |
| 34 | #include <linux/serial_core.h> |
| 35 | |
| 36 | #include <asm/system.h> |
| 37 | #include <asm/time.h> |
| 38 | #include <asm/machdep.h> |
| 39 | #include <asm/prom.h> |
| 40 | #include <asm/udbg.h> |
| 41 | #include <asm/tsi108.h> |
| 42 | #include <asm/pci-bridge.h> |
| 43 | #include <asm/reg.h> |
| 44 | #include <mm/mmu_decl.h> |
| 45 | #include "mpc7448_hpc2.h" |
| 46 | #include <asm/tsi108_irq.h> |
| 47 | #include <asm/mpic.h> |
| 48 | |
| 49 | #undef DEBUG |
| 50 | #ifdef DEBUG |
| 51 | #define DBG(fmt...) do { printk(fmt); } while(0) |
| 52 | #else |
| 53 | #define DBG(fmt...) do { } while(0) |
| 54 | #endif |
| 55 | |
| 56 | #ifndef CONFIG_PCI |
| 57 | isa_io_base = MPC7448_HPC2_ISA_IO_BASE; |
| 58 | isa_mem_base = MPC7448_HPC2_ISA_MEM_BASE; |
| 59 | pci_dram_offset = MPC7448_HPC2_PCI_MEM_OFFSET; |
| 60 | #endif |
| 61 | |
| 62 | extern int tsi108_setup_pci(struct device_node *dev); |
| 63 | extern void _nmask_and_or_msr(unsigned long nmask, unsigned long or_val); |
| 64 | extern void tsi108_pci_int_init(void); |
Zang Roy-r61911 | c4342ff | 2006-08-23 10:19:50 +0800 | [diff] [blame^] | 65 | extern void tsi108_irq_cascade(unsigned int irq, struct irq_desc *desc, |
| 66 | struct pt_regs *regs); |
Zang Roy-r61911 | c5d5633 | 2006-06-13 15:07:15 +0800 | [diff] [blame] | 67 | |
| 68 | int mpc7448_hpc2_exclude_device(u_char bus, u_char devfn) |
| 69 | { |
| 70 | if (bus == 0 && PCI_SLOT(devfn) == 0) |
| 71 | return PCIBIOS_DEVICE_NOT_FOUND; |
| 72 | else |
| 73 | return PCIBIOS_SUCCESSFUL; |
| 74 | } |
| 75 | |
| 76 | /* |
| 77 | * find pci slot by devfn in interrupt map of OF tree |
| 78 | */ |
| 79 | u8 find_slot_by_devfn(unsigned int *interrupt_map, unsigned int devfn) |
| 80 | { |
| 81 | int i; |
| 82 | unsigned int tmp; |
| 83 | for (i = 0; i < 4; i++){ |
| 84 | tmp = interrupt_map[i*4*7]; |
| 85 | if ((tmp >> 11) == (devfn >> 3)) |
| 86 | return i; |
| 87 | } |
| 88 | return i; |
| 89 | } |
| 90 | |
| 91 | /* |
| 92 | * Scans the interrupt map for pci device |
| 93 | */ |
| 94 | void mpc7448_hpc2_fixup_irq(struct pci_dev *dev) |
| 95 | { |
| 96 | struct pci_controller *hose; |
| 97 | struct device_node *node; |
| 98 | unsigned int *interrupt; |
| 99 | int busnr; |
| 100 | int len; |
| 101 | u8 slot; |
| 102 | u8 pin; |
| 103 | |
| 104 | /* Lookup the hose */ |
| 105 | busnr = dev->bus->number; |
| 106 | hose = pci_bus_to_hose(busnr); |
| 107 | if (!hose) |
| 108 | printk(KERN_ERR "No pci hose found\n"); |
| 109 | |
| 110 | /* Check it has an OF node associated */ |
| 111 | node = (struct device_node *) hose->arch_data; |
| 112 | if (!node) |
| 113 | printk(KERN_ERR "No pci node found\n"); |
| 114 | |
| 115 | interrupt = (unsigned int *) get_property(node, "interrupt-map", &len); |
| 116 | slot = find_slot_by_devfn(interrupt, dev->devfn); |
| 117 | pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin); |
| 118 | if (pin == 0 || pin > 4) |
| 119 | pin = 1; |
| 120 | pin--; |
| 121 | dev->irq = interrupt[slot*4*7 + pin*7 + 5]; |
| 122 | DBG("TSI_PCI: dev->irq = 0x%x\n", dev->irq); |
| 123 | } |
| 124 | /* temporary pci irq map fixup*/ |
| 125 | |
| 126 | void __init mpc7448_hpc2_pcibios_fixup(void) |
| 127 | { |
| 128 | struct pci_dev *dev = NULL; |
| 129 | for_each_pci_dev(dev) { |
| 130 | mpc7448_hpc2_fixup_irq(dev); |
| 131 | pci_write_config_byte(dev, PCI_INTERRUPT_LINE, dev->irq); |
| 132 | } |
| 133 | } |
| 134 | |
| 135 | static void __init mpc7448_hpc2_setup_arch(void) |
| 136 | { |
| 137 | struct device_node *cpu; |
| 138 | struct device_node *np; |
| 139 | if (ppc_md.progress) |
| 140 | ppc_md.progress("mpc7448_hpc2_setup_arch():set_bridge", 0); |
| 141 | |
| 142 | cpu = of_find_node_by_type(NULL, "cpu"); |
| 143 | if (cpu != 0) { |
| 144 | unsigned int *fp; |
| 145 | |
| 146 | fp = (int *)get_property(cpu, "clock-frequency", NULL); |
| 147 | if (fp != 0) |
| 148 | loops_per_jiffy = *fp / HZ; |
| 149 | else |
| 150 | loops_per_jiffy = 50000000 / HZ; |
| 151 | of_node_put(cpu); |
| 152 | } |
| 153 | tsi108_csr_vir_base = get_vir_csrbase(); |
| 154 | |
| 155 | #ifdef CONFIG_ROOT_NFS |
| 156 | ROOT_DEV = Root_NFS; |
| 157 | #else |
| 158 | ROOT_DEV = Root_HDA1; |
| 159 | #endif |
| 160 | |
| 161 | #ifdef CONFIG_BLK_DEV_INITRD |
| 162 | ROOT_DEV = Root_RAM0; |
| 163 | #endif |
| 164 | |
| 165 | /* setup PCI host bridge */ |
| 166 | #ifdef CONFIG_PCI |
| 167 | for (np = NULL; (np = of_find_node_by_type(np, "pci")) != NULL;) |
| 168 | tsi108_setup_pci(np); |
| 169 | |
| 170 | ppc_md.pci_exclude_device = mpc7448_hpc2_exclude_device; |
| 171 | if (ppc_md.progress) |
| 172 | ppc_md.progress("tsi108: resources set", 0x100); |
| 173 | #endif |
| 174 | |
| 175 | printk(KERN_INFO "MPC7448HPC2 (TAIGA) Platform\n"); |
| 176 | printk(KERN_INFO |
| 177 | "Jointly ported by Freescale and Tundra Semiconductor\n"); |
| 178 | printk(KERN_INFO |
| 179 | "Enabling L2 cache then enabling the HID0 prefetch engine.\n"); |
| 180 | } |
| 181 | |
| 182 | /* |
| 183 | * Interrupt setup and service. Interrrupts on the mpc7448_hpc2 come |
| 184 | * from the four external INT pins, PCI interrupts are routed via |
| 185 | * PCI interrupt control registers, it generates internal IRQ23 |
| 186 | * |
| 187 | * Interrupt routing on the Taiga Board: |
| 188 | * TSI108:PB_INT[0] -> CPU0:INT# |
| 189 | * TSI108:PB_INT[1] -> CPU0:MCP# |
| 190 | * TSI108:PB_INT[2] -> N/C |
| 191 | * TSI108:PB_INT[3] -> N/C |
| 192 | */ |
| 193 | static void __init mpc7448_hpc2_init_IRQ(void) |
| 194 | { |
| 195 | struct mpic *mpic; |
| 196 | phys_addr_t mpic_paddr = 0; |
Zang Roy-r61911 | c4342ff | 2006-08-23 10:19:50 +0800 | [diff] [blame^] | 197 | unsigned int cascade_pci_irq; |
| 198 | struct device_node *tsi_pci; |
Zang Roy-r61911 | c5d5633 | 2006-06-13 15:07:15 +0800 | [diff] [blame] | 199 | struct device_node *tsi_pic; |
| 200 | |
| 201 | tsi_pic = of_find_node_by_type(NULL, "open-pic"); |
| 202 | if (tsi_pic) { |
| 203 | unsigned int size; |
| 204 | void *prop = get_property(tsi_pic, "reg", &size); |
| 205 | mpic_paddr = of_translate_address(tsi_pic, prop); |
| 206 | } |
| 207 | |
| 208 | if (mpic_paddr == 0) { |
| 209 | printk("%s: No tsi108 PIC found !\n", __FUNCTION__); |
| 210 | return; |
| 211 | } |
| 212 | |
| 213 | DBG("%s: tsi108pic phys_addr = 0x%x\n", __FUNCTION__, |
| 214 | (u32) mpic_paddr); |
| 215 | |
Zang Roy-r61911 | c4342ff | 2006-08-23 10:19:50 +0800 | [diff] [blame^] | 216 | mpic = mpic_alloc(tsi_pic, mpic_paddr, |
Zang Roy-r61911 | c5d5633 | 2006-06-13 15:07:15 +0800 | [diff] [blame] | 217 | MPIC_PRIMARY | MPIC_BIG_ENDIAN | MPIC_WANTS_RESET | |
| 218 | MPIC_SPV_EOI | MPIC_MOD_ID(MPIC_ID_TSI108), |
| 219 | 0, /* num_sources used */ |
Zang Roy-r61911 | c5d5633 | 2006-06-13 15:07:15 +0800 | [diff] [blame] | 220 | 0, /* num_sources used */ |
Zang Roy-r61911 | c4342ff | 2006-08-23 10:19:50 +0800 | [diff] [blame^] | 221 | "Tsi108_PIC"); |
Zang Roy-r61911 | c5d5633 | 2006-06-13 15:07:15 +0800 | [diff] [blame] | 222 | |
| 223 | BUG_ON(mpic == NULL); /* XXXX */ |
Zang Roy-r61911 | c5d5633 | 2006-06-13 15:07:15 +0800 | [diff] [blame] | 224 | mpic_init(mpic); |
Zang Roy-r61911 | c4342ff | 2006-08-23 10:19:50 +0800 | [diff] [blame^] | 225 | |
| 226 | tsi_pci = of_find_node_by_type(NULL, "pci"); |
| 227 | if (tsi_pci == 0) { |
| 228 | printk("%s: No tsi108 pci node found !\n", __FUNCTION__); |
| 229 | return; |
| 230 | } |
| 231 | |
| 232 | cascade_pci_irq = irq_of_parse_and_map(tsi_pci, 0); |
| 233 | set_irq_data(cascade_pci_irq, mpic); |
| 234 | set_irq_chained_handler(cascade_pci_irq, tsi108_irq_cascade); |
| 235 | |
Zang Roy-r61911 | c5d5633 | 2006-06-13 15:07:15 +0800 | [diff] [blame] | 236 | tsi108_pci_int_init(); |
| 237 | |
| 238 | /* Configure MPIC outputs to CPU0 */ |
| 239 | tsi108_write_reg(TSI108_MPIC_OFFSET + 0x30c, 0); |
Zang Roy-r61911 | c4342ff | 2006-08-23 10:19:50 +0800 | [diff] [blame^] | 240 | of_node_put(tsi_pic); |
Zang Roy-r61911 | c5d5633 | 2006-06-13 15:07:15 +0800 | [diff] [blame] | 241 | } |
| 242 | |
| 243 | void mpc7448_hpc2_show_cpuinfo(struct seq_file *m) |
| 244 | { |
| 245 | seq_printf(m, "vendor\t\t: Freescale Semiconductor\n"); |
| 246 | seq_printf(m, "machine\t\t: MPC7448hpc2\n"); |
| 247 | } |
| 248 | |
| 249 | void mpc7448_hpc2_restart(char *cmd) |
| 250 | { |
| 251 | local_irq_disable(); |
| 252 | |
| 253 | /* Set exception prefix high - to the firmware */ |
| 254 | _nmask_and_or_msr(0, MSR_IP); |
| 255 | |
| 256 | for (;;) ; /* Spin until reset happens */ |
| 257 | } |
| 258 | |
| 259 | void mpc7448_hpc2_power_off(void) |
| 260 | { |
| 261 | local_irq_disable(); |
| 262 | for (;;) ; /* No way to shut power off with software */ |
| 263 | } |
| 264 | |
| 265 | void mpc7448_hpc2_halt(void) |
| 266 | { |
| 267 | mpc7448_hpc2_power_off(); |
| 268 | } |
| 269 | |
| 270 | /* |
| 271 | * Called very early, device-tree isn't unflattened |
| 272 | */ |
| 273 | static int __init mpc7448_hpc2_probe(void) |
| 274 | { |
| 275 | unsigned long root = of_get_flat_dt_root(); |
| 276 | |
| 277 | if (!of_flat_dt_is_compatible(root, "mpc74xx")) |
| 278 | return 0; |
| 279 | return 1; |
| 280 | } |
| 281 | |
| 282 | static int mpc7448_machine_check_exception(struct pt_regs *regs) |
| 283 | { |
| 284 | extern void tsi108_clear_pci_cfg_error(void); |
| 285 | const struct exception_table_entry *entry; |
| 286 | |
| 287 | /* Are we prepared to handle this fault */ |
| 288 | if ((entry = search_exception_tables(regs->nip)) != NULL) { |
| 289 | tsi108_clear_pci_cfg_error(); |
| 290 | regs->msr |= MSR_RI; |
| 291 | regs->nip = entry->fixup; |
| 292 | return 1; |
| 293 | } |
| 294 | return 0; |
| 295 | |
| 296 | } |
Zang Roy-r61911 | c4342ff | 2006-08-23 10:19:50 +0800 | [diff] [blame^] | 297 | |
Zang Roy-r61911 | c5d5633 | 2006-06-13 15:07:15 +0800 | [diff] [blame] | 298 | define_machine(mpc7448_hpc2){ |
| 299 | .name = "MPC7448 HPC2", |
| 300 | .probe = mpc7448_hpc2_probe, |
| 301 | .setup_arch = mpc7448_hpc2_setup_arch, |
| 302 | .init_IRQ = mpc7448_hpc2_init_IRQ, |
| 303 | .show_cpuinfo = mpc7448_hpc2_show_cpuinfo, |
| 304 | .get_irq = mpic_get_irq, |
| 305 | .pcibios_fixup = mpc7448_hpc2_pcibios_fixup, |
| 306 | .restart = mpc7448_hpc2_restart, |
| 307 | .calibrate_decr = generic_calibrate_decr, |
| 308 | .machine_check_exception= mpc7448_machine_check_exception, |
| 309 | .progress = udbg_progress, |
| 310 | }; |