From patchwork Tue Feb 10 22:20:49 2009 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gerhard Pircher X-Patchwork-Id: 22890 X-Patchwork-Delegate: benh@kernel.crashing.org Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from ozlabs.org (localhost [127.0.0.1]) by ozlabs.org (Postfix) with ESMTP id 8A618474DC for ; Wed, 11 Feb 2009 09:21:44 +1100 (EST) X-Original-To: linuxppc-dev@ozlabs.org Delivered-To: linuxppc-dev@ozlabs.org Received: from mail.gmx.net (mail.gmx.net [213.165.64.20]) by ozlabs.org (Postfix) with SMTP id 23B33DDDA0 for ; Wed, 11 Feb 2009 09:20:51 +1100 (EST) Received: (qmail 7618 invoked by uid 0); 10 Feb 2009 22:20:49 -0000 Received: from 85.127.161.100 by www161.gmx.net with HTTP; Tue, 10 Feb 2009 23:20:48 +0100 (CET) Date: Tue, 10 Feb 2009 23:20:49 +0100 From: "Gerhard Pircher" Message-ID: <20090210222049.44270@gmx.net> MIME-Version: 1.0 Subject: [PATCH v3 1/4] powerpc: Add platform support for AmigaOne To: linuxppc-dev list X-Authenticated: #6097454 X-Flags: 0001 X-Mailer: WWW-Mail 6100 (Global Message Exchange) X-Priority: 3 X-Provags-ID: V01U2FsdGVkX19ViJsPn5BVyDWT+Us1mz5VHdwocgpkAej77SxVZg Cg8B1d/2FyxHu13mX8SJQWp2+7nHCps2H0Hw== X-GMX-UID: oJH6IQJETlI8SEZvKmhrT8NOU2poZRms X-FuHaFi: 0.39 X-BeenThere: linuxppc-dev@ozlabs.org X-Mailman-Version: 2.1.11 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@ozlabs.org Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@ozlabs.org This commit adds the setup code for booting Linux on AmigaOne G3SE (G3 only), AmigaOne XE and uA1 (G3/G4) desktop computers. These boards were sold by Eyetech and are based on MAI Logic's Teron boards and its Articia S northbridge. The AmigaOne uses U-boot as firmware, which doesn't support a flattened device tree yet. The northbridge has some design flaws, which makes it necessary to use non cacheable memory for DMA operations (CONFIG_NOT_COHERENT_CACHE) and to avoid setting the coherence (M) flag for memory pages. Signed-off-by: Gerhard Pircher --- arch/powerpc/platforms/Kconfig | 1 + arch/powerpc/platforms/Makefile | 1 + arch/powerpc/platforms/amigaone/Kconfig | 18 +++ arch/powerpc/platforms/amigaone/Makefile | 1 + arch/powerpc/platforms/amigaone/setup.c | 170 ++++++++++++++++++++++++++++++ 5 files changed, 191 insertions(+), 0 deletions(-) create mode 100644 arch/powerpc/platforms/amigaone/Kconfig create mode 100644 arch/powerpc/platforms/amigaone/Makefile create mode 100644 arch/powerpc/platforms/amigaone/setup.c diff --git a/arch/powerpc/platforms/Kconfig b/arch/powerpc/platforms/Kconfig index 200b9cb..b25404c 100644 --- a/arch/powerpc/platforms/Kconfig +++ b/arch/powerpc/platforms/Kconfig @@ -28,6 +28,7 @@ source "arch/powerpc/platforms/86xx/Kconfig" source "arch/powerpc/platforms/embedded6xx/Kconfig" source "arch/powerpc/platforms/44x/Kconfig" source "arch/powerpc/platforms/40x/Kconfig" +source "arch/powerpc/platforms/amigaone/Kconfig" config PPC_NATIVE bool diff --git a/arch/powerpc/platforms/Makefile b/arch/powerpc/platforms/Makefile index 8079e0b..f741919 100644 --- a/arch/powerpc/platforms/Makefile +++ b/arch/powerpc/platforms/Makefile @@ -19,3 +19,4 @@ obj-$(CONFIG_PPC_PASEMI) += pasemi/ obj-$(CONFIG_PPC_CELL) += cell/ obj-$(CONFIG_PPC_PS3) += ps3/ obj-$(CONFIG_EMBEDDED6xx) += embedded6xx/ +obj-$(CONFIG_AMIGAONE) += amigaone/ diff --git a/arch/powerpc/platforms/amigaone/Kconfig b/arch/powerpc/platforms/amigaone/Kconfig new file mode 100644 index 0000000..9276a96 --- /dev/null +++ b/arch/powerpc/platforms/amigaone/Kconfig @@ -0,0 +1,18 @@ +config AMIGAONE + bool "Eyetech AmigaOne/MAI Teron" + depends on PPC32 && BROKEN_ON_SMP && PPC_MULTIPLATFORM + select PPC_I8259 + select PPC_INDIRECT_PCI + select PPC_UDBG_16550 + select PCI + select NOT_COHERENT_CACHE + select CHECK_CACHE_COHERENCY + select DEFAULT_UIMAGE + select PCSPKR_PLATFORM + help + Select AmigaOne for the following machines: + - AmigaOne SE/Teron CX (G3 only) + - AmigaOne XE/Teron PX + - uA1/Teron mini + More information is available at: + . diff --git a/arch/powerpc/platforms/amigaone/Makefile b/arch/powerpc/platforms/amigaone/Makefile new file mode 100644 index 0000000..e6885b3 --- /dev/null +++ b/arch/powerpc/platforms/amigaone/Makefile @@ -0,0 +1 @@ +obj-y += setup.o diff --git a/arch/powerpc/platforms/amigaone/setup.c b/arch/powerpc/platforms/amigaone/setup.c new file mode 100644 index 0000000..4430353 --- /dev/null +++ b/arch/powerpc/platforms/amigaone/setup.c @@ -0,0 +1,170 @@ +/* + * AmigaOne platform setup + * + * Copyright 2008 Gerhard Pircher (gerhard_pircher@gmx.net) + * + * Based on original amigaone_setup.c source code + * Copyright 2003 by Hans-Joerg Frieden and Thomas Frieden + * + * 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 +#include +#include + +#include +#include +#include +#include +#include +#include +#include + +extern void __flush_disable_L1(void); + +void amigaone_show_cpuinfo(struct seq_file *m) +{ + seq_printf(m, "vendor\t\t: Eyetech Ltd.\n"); +} + +static int __init amigaone_add_bridge(struct device_node *dev) +{ + const u32 *cfg_addr, *cfg_data; + int len; + const int *bus_range; + struct pci_controller *hose; + + printk(KERN_INFO "Adding PCI host bridge %s\n", dev->full_name); + + cfg_addr = of_get_address(dev, 0, NULL, NULL); + cfg_data = of_get_address(dev, 1, NULL, NULL); + if ((cfg_addr == NULL) || (cfg_data == NULL)) + return -ENODEV; + + bus_range = of_get_property(dev, "bus-range", &len); + if ((bus_range == NULL) || (len < 2 * sizeof(int))) + printk(KERN_WARNING "Can't get bus-range for %s, assume" + " bus 0\n", dev->full_name); + + hose = pcibios_alloc_controller(dev); + if (hose == NULL) + return -ENOMEM; + + hose->first_busno = bus_range ? bus_range[0] : 0; + hose->last_busno = bus_range ? bus_range[1] : 0xff; + + setup_indirect_pci(hose, cfg_addr[0], cfg_data[0], 0); + + /* Interpret the "ranges" property */ + /* This also maps the I/O region and sets isa_io/mem_base */ + pci_process_bridge_OF_ranges(hose, dev, 1); + + return 0; +} + +void __init amigaone_setup_arch(void) +{ + struct device_node *np; + int phb = -ENODEV; + + /* Lookup PCI host bridges. */ + for_each_compatible_node(np, "pci", "mai-logic,articia-s") + phb = amigaone_add_bridge(np); + + BUG_ON(phb != 0); + + if (ppc_md.progress) + ppc_md.progress("Linux/PPC "UTS_RELEASE"\n", 0); +} + +void __init amigaone_init_IRQ(void) +{ + struct device_node *pic, *np = NULL; + const unsigned long *prop = NULL; + unsigned long int_ack = 0; + + /* Search for ISA interrupt controller. */ + pic = of_find_compatible_node(NULL, "interrupt-controller", + "pnpPNP,000"); + BUG_ON(pic == NULL); + + /* Look for interrupt acknowledge address in the PCI root node. */ + np = of_find_compatible_node(NULL, "pci", "mai-logic,articia-s"); + if (np) { + prop = of_get_property(np, "8259-interrupt-acknowledge", NULL); + if (prop) + int_ack = prop[0]; + of_node_put(np); + } + + if (int_ack == 0) + printk(KERN_WARNING "Cannot find PCI interrupt acknowledge" + " address, polling\n"); + + i8259_init(pic, int_ack); + ppc_md.get_irq = i8259_irq; + irq_set_default_host(i8259_get_host()); +} + +void __init amigaone_init(void) +{ + request_region(0x00, 0x20, "dma1"); + request_region(0x40, 0x20, "timer"); + request_region(0x80, 0x10, "dma page reg"); + request_region(0xc0, 0x20, "dma2"); +} + +void amigaone_restart(char *cmd) +{ + local_irq_disable(); + + /* Flush and disable caches. */ + __flush_disable_L1(); + + /* Set SRR0 to the reset vector and turn on MSR_IP. */ + mtspr(SPRN_SRR0, 0xfff00100); + mtspr(SPRN_SRR1, MSR_IP); + + /* Do an rfi to jump back to firmware. */ + __asm__ __volatile__("rfi" : : : "memory"); + + /* Not reached. */ + while (1); +} + +static int __init amigaone_probe(void) +{ + unsigned long root = of_get_flat_dt_root(); + + if (of_flat_dt_is_compatible(root, "eyetech,amigaone")) { + /* + * Coherent memory access cause complete system lockup! Thus + * disable this CPU feature, even if the CPU needs it. + */ + cur_cpu_spec->cpu_features &= ~CPU_FTR_NEED_COHERENT; + + ISA_DMA_THRESHOLD = 0x00ffffff; + DMA_MODE_READ = 0x44; + DMA_MODE_WRITE = 0x48; + + return 1; + } + + return 0; +} + +define_machine(amigaone) { + .name = "AmigaOne", + .probe = amigaone_probe, + .setup_arch = amigaone_setup_arch, + .init = amigaone_init, + .show_cpuinfo = amigaone_show_cpuinfo, + .init_IRQ = amigaone_init_IRQ, + .restart = amigaone_restart, + .calibrate_decr = generic_calibrate_decr, + .progress = udbg_progress, +};