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195 lines
4.9 KiB
195 lines
4.9 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* mpc7448_hpc2.c |
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* |
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* Board setup routines for the Freescale mpc7448hpc2(taiga) platform |
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* |
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* Author: Jacob Pan |
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* [email protected] |
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* Author: Xianghua Xiao |
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* [email protected] |
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* Maintainer: Roy Zang <[email protected]> |
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* Add Flat Device Tree support fot mpc7448hpc2 board |
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* |
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* Copyright 2004-2006 Freescale Semiconductor, Inc. |
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*/ |
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#include <linux/stddef.h> |
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#include <linux/kernel.h> |
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#include <linux/pci.h> |
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#include <linux/kdev_t.h> |
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#include <linux/console.h> |
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#include <linux/extable.h> |
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#include <linux/delay.h> |
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#include <linux/irq.h> |
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#include <linux/seq_file.h> |
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#include <linux/root_dev.h> |
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#include <linux/serial.h> |
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#include <linux/tty.h> |
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#include <linux/serial_core.h> |
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#include <asm/time.h> |
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#include <asm/machdep.h> |
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#include <asm/prom.h> |
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#include <asm/udbg.h> |
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#include <asm/tsi108.h> |
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#include <asm/pci-bridge.h> |
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#include <asm/reg.h> |
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#include <mm/mmu_decl.h> |
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#include <asm/tsi108_pci.h> |
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#include <asm/tsi108_irq.h> |
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#include <asm/mpic.h> |
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#undef DEBUG |
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#ifdef DEBUG |
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#define DBG(fmt...) do { printk(fmt); } while(0) |
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#else |
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#define DBG(fmt...) do { } while(0) |
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#endif |
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#define MPC7448HPC2_PCI_CFG_PHYS 0xfb000000 |
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int mpc7448_hpc2_exclude_device(struct pci_controller *hose, |
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u_char bus, u_char devfn) |
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{ |
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if (bus == 0 && PCI_SLOT(devfn) == 0) |
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return PCIBIOS_DEVICE_NOT_FOUND; |
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else |
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return PCIBIOS_SUCCESSFUL; |
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} |
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static void __init mpc7448_hpc2_setup_pci(void) |
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{ |
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#ifdef CONFIG_PCI |
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struct device_node *np; |
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if (ppc_md.progress) |
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ppc_md.progress("mpc7448_hpc2_setup_pci():set_bridge", 0); |
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/* setup PCI host bridge */ |
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for_each_compatible_node(np, "pci", "tsi108-pci") |
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tsi108_setup_pci(np, MPC7448HPC2_PCI_CFG_PHYS, 0); |
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ppc_md.pci_exclude_device = mpc7448_hpc2_exclude_device; |
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if (ppc_md.progress) |
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ppc_md.progress("tsi108: resources set", 0x100); |
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#endif |
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} |
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static void __init mpc7448_hpc2_setup_arch(void) |
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{ |
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tsi108_csr_vir_base = get_vir_csrbase(); |
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printk(KERN_INFO "MPC7448HPC2 (TAIGA) Platform\n"); |
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printk(KERN_INFO |
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"Jointly ported by Freescale and Tundra Semiconductor\n"); |
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printk(KERN_INFO |
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"Enabling L2 cache then enabling the HID0 prefetch engine.\n"); |
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} |
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/* |
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* Interrupt setup and service. Interrupts on the mpc7448_hpc2 come |
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* from the four external INT pins, PCI interrupts are routed via |
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* PCI interrupt control registers, it generates internal IRQ23 |
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* |
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* Interrupt routing on the Taiga Board: |
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* TSI108:PB_INT[0] -> CPU0:INT# |
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* TSI108:PB_INT[1] -> CPU0:MCP# |
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* TSI108:PB_INT[2] -> N/C |
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* TSI108:PB_INT[3] -> N/C |
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*/ |
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static void __init mpc7448_hpc2_init_IRQ(void) |
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{ |
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struct mpic *mpic; |
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#ifdef CONFIG_PCI |
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unsigned int cascade_pci_irq; |
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struct device_node *tsi_pci; |
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struct device_node *cascade_node = NULL; |
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#endif |
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mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN | |
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MPIC_SPV_EOI | MPIC_NO_PTHROU_DIS | MPIC_REGSET_TSI108, |
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24, 0, |
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"Tsi108_PIC"); |
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BUG_ON(mpic == NULL); |
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mpic_assign_isu(mpic, 0, mpic->paddr + 0x100); |
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mpic_init(mpic); |
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#ifdef CONFIG_PCI |
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tsi_pci = of_find_node_by_type(NULL, "pci"); |
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if (tsi_pci == NULL) { |
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printk("%s: No tsi108 pci node found !\n", __func__); |
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return; |
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} |
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cascade_node = of_find_node_by_type(NULL, "pic-router"); |
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if (cascade_node == NULL) { |
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printk("%s: No tsi108 pci cascade node found !\n", __func__); |
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return; |
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} |
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cascade_pci_irq = irq_of_parse_and_map(tsi_pci, 0); |
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DBG("%s: tsi108 cascade_pci_irq = 0x%x\n", __func__, |
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(u32) cascade_pci_irq); |
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tsi108_pci_int_init(cascade_node); |
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irq_set_handler_data(cascade_pci_irq, mpic); |
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irq_set_chained_handler(cascade_pci_irq, tsi108_irq_cascade); |
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#endif |
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/* Configure MPIC outputs to CPU0 */ |
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tsi108_write_reg(TSI108_MPIC_OFFSET + 0x30c, 0); |
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} |
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void mpc7448_hpc2_show_cpuinfo(struct seq_file *m) |
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{ |
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seq_printf(m, "vendor\t\t: Freescale Semiconductor\n"); |
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} |
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static void __noreturn mpc7448_hpc2_restart(char *cmd) |
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{ |
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local_irq_disable(); |
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/* Set exception prefix high - to the firmware */ |
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mtmsr(mfmsr() | MSR_IP); |
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isync(); |
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for (;;) ; /* Spin until reset happens */ |
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} |
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/* |
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* Called very early, device-tree isn't unflattened |
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*/ |
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static int __init mpc7448_hpc2_probe(void) |
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{ |
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if (!of_machine_is_compatible("mpc74xx")) |
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return 0; |
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return 1; |
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} |
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static int mpc7448_machine_check_exception(struct pt_regs *regs) |
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{ |
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const struct exception_table_entry *entry; |
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/* Are we prepared to handle this fault */ |
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if ((entry = search_exception_tables(regs->nip)) != NULL) { |
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tsi108_clear_pci_cfg_error(); |
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regs->msr |= MSR_RI; |
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regs->nip = extable_fixup(entry); |
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return 1; |
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} |
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return 0; |
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} |
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define_machine(mpc7448_hpc2){ |
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.name = "MPC7448 HPC2", |
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.probe = mpc7448_hpc2_probe, |
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.setup_arch = mpc7448_hpc2_setup_arch, |
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.discover_phbs = mpc7448_hpc2_setup_pci, |
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.init_IRQ = mpc7448_hpc2_init_IRQ, |
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.show_cpuinfo = mpc7448_hpc2_show_cpuinfo, |
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.get_irq = mpic_get_irq, |
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.restart = mpc7448_hpc2_restart, |
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.calibrate_decr = generic_calibrate_decr, |
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.machine_check_exception= mpc7448_machine_check_exception, |
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.progress = udbg_progress, |
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};
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