diff options
Diffstat (limited to 'arch/powerpc/platforms/85xx/mpc85xx_ds.c')
| -rw-r--r-- | arch/powerpc/platforms/85xx/mpc85xx_ds.c | 188 |
1 files changed, 188 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/85xx/mpc85xx_ds.c b/arch/powerpc/platforms/85xx/mpc85xx_ds.c new file mode 100644 index 00000000000..48983bc56d4 --- /dev/null +++ b/arch/powerpc/platforms/85xx/mpc85xx_ds.c @@ -0,0 +1,188 @@ +/* + * MPC8544 DS Board Setup + * + * Author Xianghua Xiao (x.xiao@freescale.com) + * Roy Zang <tie-fei.zang@freescale.com> + * - Add PCI/PCI Exprees support + * Copyright 2007 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/delay.h> +#include <linux/seq_file.h> +#include <linux/interrupt.h> + +#include <asm/system.h> +#include <asm/time.h> +#include <asm/machdep.h> +#include <asm/pci-bridge.h> +#include <asm/mpc85xx.h> +#include <mm/mmu_decl.h> +#include <asm/prom.h> +#include <asm/udbg.h> +#include <asm/mpic.h> +#include <asm/i8259.h> + +#include <sysdev/fsl_soc.h> +#include <sysdev/fsl_pci.h> +#include "mpc85xx.h" + +#undef DEBUG + +#ifdef DEBUG +#define DBG(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args) +#else +#define DBG(fmt, args...) +#endif + +#ifdef CONFIG_PPC_I8259 +static void mpc8544_8259_cascade(unsigned int irq, struct irq_desc *desc) +{ + unsigned int cascade_irq = i8259_irq(); + + if (cascade_irq != NO_IRQ) { + generic_handle_irq(cascade_irq); + } + desc->chip->eoi(irq); +} +#endif /* CONFIG_PPC_I8259 */ + +void __init mpc8544_ds_pic_init(void) +{ + struct mpic *mpic; + struct resource r; + struct device_node *np = NULL; +#ifdef CONFIG_PPC_I8259 + struct device_node *cascade_node = NULL; + int cascade_irq; +#endif + + np = of_find_node_by_type(np, "open-pic"); + + if (np == NULL) { + printk(KERN_ERR "Could not find open-pic node\n"); + return; + } + + if (of_address_to_resource(np, 0, &r)) { + printk(KERN_ERR "Failed to map mpic register space\n"); + of_node_put(np); + return; + } + + mpic = mpic_alloc(np, r.start, + MPIC_PRIMARY | MPIC_WANTS_RESET | MPIC_BIG_ENDIAN, + 0, 256, " OpenPIC "); + BUG_ON(mpic == NULL); + + mpic_init(mpic); + +#ifdef CONFIG_PPC_I8259 + /* Initialize the i8259 controller */ + for_each_node_by_type(np, "interrupt-controller") + if (of_device_is_compatible(np, "chrp,iic")) { + cascade_node = np; + break; + } + + if (cascade_node == NULL) { + printk(KERN_DEBUG "Could not find i8259 PIC\n"); + return; + } + + cascade_irq = irq_of_parse_and_map(cascade_node, 0); + if (cascade_irq == NO_IRQ) { + printk(KERN_ERR "Failed to map cascade interrupt\n"); + return; + } + + DBG("mpc8544ds: cascade mapped to irq %d\n", cascade_irq); + + i8259_init(cascade_node, 0); + of_node_put(cascade_node); + + set_irq_chained_handler(cascade_irq, mpc8544_8259_cascade); +#endif /* CONFIG_PPC_I8259 */ +} + +#ifdef CONFIG_PCI +extern int uses_fsl_uli_m1575; +extern int uli_exclude_device(struct pci_controller *hose, + u_char bus, u_char devfn); + +static int mpc85xx_exclude_device(struct pci_controller *hose, + u_char bus, u_char devfn) +{ + struct device_node* node; + struct resource rsrc; + + node = (struct device_node *)hose->arch_data; + of_address_to_resource(node, 0, &rsrc); + + if ((rsrc.start & 0xfffff) == 0xb000) { + return uli_exclude_device(hose, bus, devfn); + } + + return PCIBIOS_SUCCESSFUL; +} +#endif /* CONFIG_PCI */ + +/* + * Setup the architecture + */ +static void __init mpc8544_ds_setup_arch(void) +{ +#ifdef CONFIG_PCI + struct device_node *np; +#endif + + if (ppc_md.progress) + ppc_md.progress("mpc8544_ds_setup_arch()", 0); + +#ifdef CONFIG_PCI + for (np = NULL; (np = of_find_node_by_type(np, "pci")) != NULL;) { + struct resource rsrc; + of_address_to_resource(np, 0, &rsrc); + if ((rsrc.start & 0xfffff) == 0xb000) + fsl_add_bridge(np, 1); + else + fsl_add_bridge(np, 0); + } + uses_fsl_uli_m1575 = 1; + ppc_md.pci_exclude_device = mpc85xx_exclude_device; +#endif + + printk("MPC8544 DS board from Freescale Semiconductor\n"); +} + +/* + * Called very early, device-tree isn't unflattened + */ +static int __init mpc8544_ds_probe(void) +{ + unsigned long root = of_get_flat_dt_root(); + + return of_flat_dt_is_compatible(root, "MPC8544DS"); +} + +define_machine(mpc8544_ds) { + .name = "MPC8544 DS", + .probe = mpc8544_ds_probe, + .setup_arch = mpc8544_ds_setup_arch, + .init_IRQ = mpc8544_ds_pic_init, +#ifdef CONFIG_PCI + .pcibios_fixup_bus = fsl_pcibios_fixup_bus, +#endif + .get_irq = mpic_get_irq, + .restart = mpc85xx_restart, + .calibrate_decr = generic_calibrate_decr, + .progress = udbg_progress, +}; |