diff options
Diffstat (limited to 'arch/powerpc/platforms/embedded6xx/mpc7448_hpc2.c')
| -rw-r--r-- | arch/powerpc/platforms/embedded6xx/mpc7448_hpc2.c | 196 |
1 files changed, 196 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/embedded6xx/mpc7448_hpc2.c b/arch/powerpc/platforms/embedded6xx/mpc7448_hpc2.c new file mode 100644 index 000000000..df4ad95f1 --- /dev/null +++ b/arch/powerpc/platforms/embedded6xx/mpc7448_hpc2.c @@ -0,0 +1,196 @@ +/* + * mpc7448_hpc2.c + * + * Board setup routines for the Freescale mpc7448hpc2(taiga) platform + * + * Author: Jacob Pan + * jacob.pan@freescale.com + * Author: Xianghua Xiao + * x.xiao@freescale.com + * Maintainer: Roy Zang <tie-fei.zang@freescale.com> + * Add Flat Device Tree support fot mpc7448hpc2 board + * + * Copyright 2004-2006 Freescale Semiconductor, Inc. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + */ + +#include <linux/stddef.h> +#include <linux/kernel.h> +#include <linux/pci.h> +#include <linux/kdev_t.h> +#include <linux/console.h> +#include <linux/module.h> +#include <linux/delay.h> +#include <linux/irq.h> +#include <linux/seq_file.h> +#include <linux/root_dev.h> +#include <linux/serial.h> +#include <linux/tty.h> +#include <linux/serial_core.h> + +#include <asm/time.h> +#include <asm/machdep.h> +#include <asm/prom.h> +#include <asm/udbg.h> +#include <asm/tsi108.h> +#include <asm/pci-bridge.h> +#include <asm/reg.h> +#include <mm/mmu_decl.h> +#include <asm/tsi108_pci.h> +#include <asm/tsi108_irq.h> +#include <asm/mpic.h> + +#undef DEBUG +#ifdef DEBUG +#define DBG(fmt...) do { printk(fmt); } while(0) +#else +#define DBG(fmt...) do { } while(0) +#endif + +#define MPC7448HPC2_PCI_CFG_PHYS 0xfb000000 + +int mpc7448_hpc2_exclude_device(struct pci_controller *hose, + u_char bus, u_char devfn) +{ + if (bus == 0 && PCI_SLOT(devfn) == 0) + return PCIBIOS_DEVICE_NOT_FOUND; + else + return PCIBIOS_SUCCESSFUL; +} + +static void __init mpc7448_hpc2_setup_arch(void) +{ + struct device_node *np; + if (ppc_md.progress) + ppc_md.progress("mpc7448_hpc2_setup_arch():set_bridge", 0); + + tsi108_csr_vir_base = get_vir_csrbase(); + + /* setup PCI host bridge */ +#ifdef CONFIG_PCI + for_each_compatible_node(np, "pci", "tsi108-pci") + tsi108_setup_pci(np, MPC7448HPC2_PCI_CFG_PHYS, 0); + + ppc_md.pci_exclude_device = mpc7448_hpc2_exclude_device; + if (ppc_md.progress) + ppc_md.progress("tsi108: resources set", 0x100); +#endif + + printk(KERN_INFO "MPC7448HPC2 (TAIGA) Platform\n"); + printk(KERN_INFO + "Jointly ported by Freescale and Tundra Semiconductor\n"); + printk(KERN_INFO + "Enabling L2 cache then enabling the HID0 prefetch engine.\n"); +} + +/* + * Interrupt setup and service. Interrupts on the mpc7448_hpc2 come + * from the four external INT pins, PCI interrupts are routed via + * PCI interrupt control registers, it generates internal IRQ23 + * + * Interrupt routing on the Taiga Board: + * TSI108:PB_INT[0] -> CPU0:INT# + * TSI108:PB_INT[1] -> CPU0:MCP# + * TSI108:PB_INT[2] -> N/C + * TSI108:PB_INT[3] -> N/C + */ +static void __init mpc7448_hpc2_init_IRQ(void) +{ + struct mpic *mpic; +#ifdef CONFIG_PCI + unsigned int cascade_pci_irq; + struct device_node *tsi_pci; + struct device_node *cascade_node = NULL; +#endif + + mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN | + MPIC_SPV_EOI | MPIC_NO_PTHROU_DIS | MPIC_REGSET_TSI108, + 24, 0, + "Tsi108_PIC"); + + BUG_ON(mpic == NULL); + + mpic_assign_isu(mpic, 0, mpic->paddr + 0x100); + + mpic_init(mpic); + +#ifdef CONFIG_PCI + tsi_pci = of_find_node_by_type(NULL, "pci"); + if (tsi_pci == NULL) { + printk("%s: No tsi108 pci node found !\n", __func__); + return; + } + cascade_node = of_find_node_by_type(NULL, "pic-router"); + if (cascade_node == NULL) { + printk("%s: No tsi108 pci cascade node found !\n", __func__); + return; + } + + cascade_pci_irq = irq_of_parse_and_map(tsi_pci, 0); + DBG("%s: tsi108 cascade_pci_irq = 0x%x\n", __func__, + (u32) cascade_pci_irq); + tsi108_pci_int_init(cascade_node); + irq_set_handler_data(cascade_pci_irq, mpic); + irq_set_chained_handler(cascade_pci_irq, tsi108_irq_cascade); +#endif + /* Configure MPIC outputs to CPU0 */ + tsi108_write_reg(TSI108_MPIC_OFFSET + 0x30c, 0); +} + +void mpc7448_hpc2_show_cpuinfo(struct seq_file *m) +{ + seq_printf(m, "vendor\t\t: Freescale Semiconductor\n"); +} + +void mpc7448_hpc2_restart(char *cmd) +{ + local_irq_disable(); + + /* Set exception prefix high - to the firmware */ + _nmask_and_or_msr(0, MSR_IP); + + for (;;) ; /* Spin until reset happens */ +} + +/* + * Called very early, device-tree isn't unflattened + */ +static int __init mpc7448_hpc2_probe(void) +{ + unsigned long root = of_get_flat_dt_root(); + + if (!of_flat_dt_is_compatible(root, "mpc74xx")) + return 0; + return 1; +} + +static int mpc7448_machine_check_exception(struct pt_regs *regs) +{ + const struct exception_table_entry *entry; + + /* Are we prepared to handle this fault */ + if ((entry = search_exception_tables(regs->nip)) != NULL) { + tsi108_clear_pci_cfg_error(); + regs->msr |= MSR_RI; + regs->nip = entry->fixup; + return 1; + } + return 0; +} + +define_machine(mpc7448_hpc2){ + .name = "MPC7448 HPC2", + .probe = mpc7448_hpc2_probe, + .setup_arch = mpc7448_hpc2_setup_arch, + .init_IRQ = mpc7448_hpc2_init_IRQ, + .show_cpuinfo = mpc7448_hpc2_show_cpuinfo, + .get_irq = mpic_get_irq, + .restart = mpc7448_hpc2_restart, + .calibrate_decr = generic_calibrate_decr, + .machine_check_exception= mpc7448_machine_check_exception, + .progress = udbg_progress, +}; |