diff options
Diffstat (limited to 'arch/powerpc/platforms/86xx/mpc86xx_hpcn.c')
| -rw-r--r-- | arch/powerpc/platforms/86xx/mpc86xx_hpcn.c | 192 |
1 files changed, 192 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/86xx/mpc86xx_hpcn.c b/arch/powerpc/platforms/86xx/mpc86xx_hpcn.c new file mode 100644 index 00000000..b11c3535 --- /dev/null +++ b/arch/powerpc/platforms/86xx/mpc86xx_hpcn.c @@ -0,0 +1,192 @@ +/* + * MPC86xx HPCN board specific routines + * + * Recode: ZHANG WEI <wei.zhang@freescale.com> + * Initial author: Xianghua Xiao <x.xiao@freescale.com> + * + * Copyright 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/delay.h> +#include <linux/seq_file.h> +#include <linux/of_platform.h> +#include <linux/memblock.h> + +#include <asm/system.h> +#include <asm/time.h> +#include <asm/machdep.h> +#include <asm/pci-bridge.h> +#include <asm/prom.h> +#include <mm/mmu_decl.h> +#include <asm/udbg.h> +#include <asm/swiotlb.h> + +#include <asm/mpic.h> + +#include <sysdev/fsl_pci.h> +#include <sysdev/fsl_soc.h> + +#include "mpc86xx.h" + +#undef DEBUG + +#ifdef DEBUG +#define DBG(fmt...) do { printk(KERN_ERR fmt); } while(0) +#else +#define DBG(fmt...) do { } while(0) +#endif + +#ifdef CONFIG_PCI +extern int uli_exclude_device(struct pci_controller *hose, + u_char bus, u_char devfn); + +static int mpc86xx_exclude_device(struct pci_controller *hose, + u_char bus, u_char devfn) +{ + struct device_node* node; + struct resource rsrc; + + node = hose->dn; + of_address_to_resource(node, 0, &rsrc); + + if ((rsrc.start & 0xfffff) == 0x8000) { + return uli_exclude_device(hose, bus, devfn); + } + + return PCIBIOS_SUCCESSFUL; +} +#endif /* CONFIG_PCI */ + + +static void __init +mpc86xx_hpcn_setup_arch(void) +{ +#ifdef CONFIG_PCI + struct device_node *np; + struct pci_controller *hose; +#endif + dma_addr_t max = 0xffffffff; + + if (ppc_md.progress) + ppc_md.progress("mpc86xx_hpcn_setup_arch()", 0); + +#ifdef CONFIG_PCI + for_each_compatible_node(np, "pci", "fsl,mpc8641-pcie") { + struct resource rsrc; + of_address_to_resource(np, 0, &rsrc); + if ((rsrc.start & 0xfffff) == 0x8000) + fsl_add_bridge(np, 1); + else + fsl_add_bridge(np, 0); + hose = pci_find_hose_for_OF_device(np); + max = min(max, hose->dma_window_base_cur + + hose->dma_window_size); + } + + ppc_md.pci_exclude_device = mpc86xx_exclude_device; + +#endif + + printk("MPC86xx HPCN board from Freescale Semiconductor\n"); + +#ifdef CONFIG_SMP + mpc86xx_smp_init(); +#endif + +#ifdef CONFIG_SWIOTLB + if (memblock_end_of_DRAM() > max) { + ppc_swiotlb_enable = 1; + set_pci_dma_ops(&swiotlb_dma_ops); + ppc_md.pci_dma_dev_setup = pci_dma_dev_setup_swiotlb; + } +#endif +} + + +static void +mpc86xx_hpcn_show_cpuinfo(struct seq_file *m) +{ + uint svid = mfspr(SPRN_SVR); + + seq_printf(m, "Vendor\t\t: Freescale Semiconductor\n"); + + seq_printf(m, "SVR\t\t: 0x%x\n", svid); +} + + +/* + * Called very early, device-tree isn't unflattened + */ +static int __init mpc86xx_hpcn_probe(void) +{ + unsigned long root = of_get_flat_dt_root(); + + if (of_flat_dt_is_compatible(root, "fsl,mpc8641hpcn")) + return 1; /* Looks good */ + + /* Be nice and don't give silent boot death. Delete this in 2.6.27 */ + if (of_flat_dt_is_compatible(root, "mpc86xx")) { + pr_warning("WARNING: your dts/dtb is old. You must update before the next kernel release\n"); + return 1; + } + + return 0; +} + +static long __init +mpc86xx_time_init(void) +{ + unsigned int temp; + + /* Set the time base to zero */ + mtspr(SPRN_TBWL, 0); + mtspr(SPRN_TBWU, 0); + + temp = mfspr(SPRN_HID0); + temp |= HID0_TBEN; + mtspr(SPRN_HID0, temp); + asm volatile("isync"); + + return 0; +} + +static __initdata struct of_device_id of_bus_ids[] = { + { .compatible = "simple-bus", }, + { .compatible = "fsl,rapidio-delta", }, + { .compatible = "gianfar", }, + {}, +}; + +static int __init declare_of_platform_devices(void) +{ + of_platform_bus_probe(NULL, of_bus_ids, NULL); + + return 0; +} +machine_device_initcall(mpc86xx_hpcn, declare_of_platform_devices); +machine_arch_initcall(mpc86xx_hpcn, swiotlb_setup_bus_notifier); + +define_machine(mpc86xx_hpcn) { + .name = "MPC86xx HPCN", + .probe = mpc86xx_hpcn_probe, + .setup_arch = mpc86xx_hpcn_setup_arch, + .init_IRQ = mpc86xx_init_irq, + .show_cpuinfo = mpc86xx_hpcn_show_cpuinfo, + .get_irq = mpic_get_irq, + .restart = fsl_rstcr_restart, + .time_init = mpc86xx_time_init, + .calibrate_decr = generic_calibrate_decr, + .progress = udbg_progress, +#ifdef CONFIG_PCI + .pcibios_fixup_bus = fsl_pcibios_fixup_bus, +#endif +}; |