From patchwork Sun Dec 31 22:00:14 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Darren Stevens X-Patchwork-Id: 854270 Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [103.22.144.68]) (using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 3z8vvR4xjMz9t3w for ; Mon, 1 Jan 2018 09:22:11 +1100 (AEDT) Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 3z8vvR2tPDzDr23 for ; Mon, 1 Jan 2018 09:22:11 +1100 (AEDT) X-Original-To: linuxppc-dev@lists.ozlabs.org Delivered-To: linuxppc-dev@lists.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=stevens-zone.net (client-ip=212.227.17.10; helo=mout.kundenserver.de; envelope-from=darren@stevens-zone.net; receiver=) Received: from mout.kundenserver.de (mout.kundenserver.de [212.227.17.10]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 3z8vnN1MqqzDr1k for ; Mon, 1 Jan 2018 09:16:55 +1100 (AEDT) Received: from [127.0.0.1] ([86.161.101.150]) by mrelayeu.kundenserver.de (mreue105 [212.227.15.179]) with ESMTPA (Nemesis) id 0MPoiw-1eajz733XW-004xh0; Sun, 31 Dec 2017 23:16:51 +0100 From: Darren Stevens To: linuxppc-dev Date: Sun, 31 Dec 2017 22:00:14 +0000 (GMT) Message-ID: <4b3d1ee02c7.3de0aa2c@auth.smtp.1and1.co.uk> User-Agent: YAM/2.9p1 (AmigaOS4; PPC; rv:20140418r7798) Subject: [PATCH NEXT 1/4] powerpc/pasemi: Add PCI initialisation for Nemo board. MIME-Version: 1.0 Content-type: multipart/mixed; boundary="--=_BOUNDARY.6c36894036f0cf76.1d" X-Provags-ID: V03:K0:GhqFMTZcN8NgU/OOh/YS5YqpWUIzrERObty4JA/8VUJDNLTSxSH HqPYVO4oP/v/zmyeRGIUtbDr0CWO2USc9sp5bpGxlLxJYB86Jx/jIrPYhB/+Jh+6cVpF4VW +XPEbGwvlB6WYYEIuuxCpYyNjWJkxpS2H9NEjXipF3WjQjmOvhXKfo2ZPN0kjfrTJWpEtim xVvFzge03guTXEPhsryZQ== X-UI-Out-Filterresults: notjunk:1; V01:K0:+tb0CWxGvWA=:P8UadByj+jQzDRYJOR7LXo 2V9bQTgEu2fuaxkOqNuPzmuizaQoe+G5YJWGBE714p6+yKZII/QQjsttfnnecuWV1+wPo0wIb d0y2l9n2+EEkm+W81DPma3f6p692Zilzih/oGiKsqAogAkHym2WQtKSlyMAkw1AeyrnrF2lfT a/fQbegZqHAP0KYszwXqbT0sCno2zqmWLv7UzLZsBRywHSp/kMnAJbsfFyLd/ISxArNkzUIj4 95s+GD5JylNyHd3cw3BofwOFyxu0zvZVXrK9zyWLT/H7QMsk9LK74nhKSm8OluAffo0SQ+tzM pjY0SOP+xdLI4N5MEwC3ntLCN9P4ojpFSA8vux9W6WsdllTr2YZyufQwO8g7pe7aXpnPHFRPQ 0Vlp3afHyk0JLRg0uu2GfnAV+j7Qm07R4uzP+41XmfuSJs50IpVmz458Lrn1ACdGBWptnVFqz X53BWksL9WOjrDKCipdiHzvn1q7K2u+FikadRj2We8ZacpMp2CKQoGDdV6spu2YInTokV8Rme 8QvDGRHwLmnOCC8ZzTQsmGa1RYyOLHI2MoTnH3KcGUXpG+3qP2jPh2Q0Gk47UzMyCrkppnevy NGZ8VeNSVCqur22V5VHR05epgwE4cvvgNSP8zbATMQ+U8GMN7kL/P09NFwyHW1xdKk2ivvvJ6 7DY2qPIGtUHySpQBhAZ12b7xn//JgpUPJIZQV8WfiaZ8U/l8lufZjQ7hPERyFWOn1wJP9ldcD urnIbKOFtORjuF3EHkxvIQ91sb1D+R/+GKLRlQ== X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.24 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: chzigotzky@xenosoft.de Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" The A-Eon Amigaone X1000's Nemo motherboard has an AMD SB600 connected to one of the PCI-e root ports on its PaSemi Pwrficient 1628M SoC. Normally the SB600 southbridge would be connected to a hidden PCI-e port on the system's northbridge, and as a result doesn't fully comply with the PCI-e spec. Add code to relax the PCI-e detection in both the root port and the Linux kernel allowing on board devices to be detected. Signed-off-by: Darren Stevens diff --git a/arch/powerpc/platforms/pasemi/pasemi.h b/arch/powerpc/platforms/pasemi/pasemi.h index 329d2a6..8900dee 100644 --- a/arch/powerpc/platforms/pasemi/pasemi.h +++ b/arch/powerpc/platforms/pasemi/pasemi.h @@ -3,6 +3,9 @@ #define _PASEMI_PASEMI_H extern unsigned long pas_get_boot_time(void); +#ifdef CONFIG_PPC_PASEMI_NEMO +extern void nemo_pci_init(void); +#endif extern void pas_pci_init(void); extern void pas_pci_irq_fixup(struct pci_dev *dev); extern void pas_pci_dma_dev_setup(struct pci_dev *dev); diff --git a/arch/powerpc/platforms/pasemi/pci.c b/arch/powerpc/platforms/pasemi/pci.c index 5ff6108..cb0ac87 100644 --- a/arch/powerpc/platforms/pasemi/pci.c +++ b/arch/powerpc/platforms/pasemi/pci.c @@ -27,6 +27,7 @@ #include #include +#include #include #include @@ -108,6 +109,92 @@ static int workaround_5945(struct pci_bus *bus, unsigned int devfn, return 1; } +#ifdef CONFIG_PPC_PASEMI_NEMO +static int sb600_bus = 5; +static void __iomem *iob_mapbase = NULL; + +static void sb600_set_flag(int bus) +{ + struct resource res; + struct device_node *dn; + int err; + + if (iob_mapbase == NULL) { + dn = of_find_compatible_node(NULL, "isa", "pasemi,1682m-iob"); + if (!dn) { + printk(KERN_CRIT "NEMO SB600 missing iob node\n"); + return; + } + + err = of_address_to_resource(dn, 0, &res); + of_node_put(dn); + + if (err) { + printk(KERN_CRIT "NEMO SB600 missing resource\n"); + return; + } + + printk(KERN_CRIT "NEMO SB600 IOB base %08lx\n",res.start); + + iob_mapbase = ioremap(res.start + 0x100, 0x94); + } + + if (iob_mapbase != NULL) { + if (bus == sb600_bus) { + /* + * This is the SB600's bus, tell the PCI-e root port + * to allow non-zero devices to enumerate. + */ + out_le32(iob_mapbase + 4, in_le32(iob_mapbase + 4) | 0x800); + } else { + /* + * Only scan device 0 on other busses + */ + out_le32(iob_mapbase + 4, in_le32(iob_mapbase + 4) & ~0x800); + } + } +} + +static int nemo_pxp_read_config(struct pci_bus *bus, unsigned int devfn, + int offset, int len, u32 *val) +{ + struct pci_controller *hose; + void volatile __iomem *addr; + + hose = pci_bus_to_host(bus); + if (!hose) + return PCIBIOS_DEVICE_NOT_FOUND; + + if (!pa_pxp_offset_valid(bus->number, devfn, offset)) + return PCIBIOS_BAD_REGISTER_NUMBER; + + if (workaround_5945(bus, devfn, offset, len, val)) + return PCIBIOS_SUCCESSFUL; + + addr = pa_pxp_cfg_addr(hose, bus->number, devfn, offset); + + sb600_set_flag(bus->number); + + /* + * Note: the caller has already checked that offset is + * suitably aligned and that len is 1, 2 or 4. + */ + switch (len) { + case 1: + *val = in_8(addr); + break; + case 2: + *val = in_le16(addr); + break; + default: + *val = in_le32(addr); + break; + } + + return PCIBIOS_SUCCESSFUL; +} +#endif + static int pa_pxp_read_config(struct pci_bus *bus, unsigned int devfn, int offset, int len, u32 *val) { @@ -178,6 +265,20 @@ static int pa_pxp_write_config(struct pci_bus *bus, unsigned int devfn, return PCIBIOS_SUCCESSFUL; } +#ifdef CONFIG_PPC_PASEMI_NEMO +static struct pci_ops nemo_pxp_ops = { + .read = nemo_pxp_read_config, + .write = pa_pxp_write_config, +}; + +static void __init setup_nemo_pxp(struct pci_controller *hose) +{ + hose->ops = &nemo_pxp_ops; + hose->cfg_data = ioremap(0xe0000000, 0x10000000); +} + +#endif + static struct pci_ops pa_pxp_ops = { .read = pa_pxp_read_config, .write = pa_pxp_write_config, @@ -189,6 +290,35 @@ static void __init setup_pa_pxp(struct pci_controller *hose) hose->cfg_data = ioremap(0xe0000000, 0x10000000); } +#ifdef CONFIG_PPC_PASEMI_NEMO +static int __init nemo_add_bridge(struct device_node *dev) +{ + struct pci_controller *hose; + + pr_debug("Adding PCI host bridge %pOF\n", dev); + + hose = pcibios_alloc_controller(dev); + if (!hose) + return -ENOMEM; + + hose->first_busno = 0; + hose->last_busno = 0xff; + hose->controller_ops = pasemi_pci_controller_ops; + + setup_nemo_pxp(hose); + + printk(KERN_INFO "Found PA-PXP PCI host bridge.\n"); + + /* Interpret the "ranges" property */ + pci_process_bridge_OF_ranges(hose, dev, 1); + + /* Scan for an isa bridge. */ + isa_bridge_find_early(hose); + + return 0; +} +#endif + static int __init pas_add_bridge(struct device_node *dev) { struct pci_controller *hose; @@ -213,6 +343,28 @@ static int __init pas_add_bridge(struct device_node *dev) return 0; } +#ifdef CONFIG_PPC_PASEMI_NEMO +void __init nemo_pci_init(void) +{ + struct device_node *np, *root; + + root = of_find_node_by_path("/"); + if (!root) { + printk(KERN_CRIT "pas_pci_init: can't find root " + "of device tree\n"); + return; + } + + pci_set_flags(PCI_SCAN_ALL_PCIE_DEVS); + + for (np = NULL; (np = of_get_next_child(root, np)) != NULL;) + if (np->name && !strcmp(np->name, "pxp") && !nemo_add_bridge(np)) + of_node_get(np); + + of_node_put(root); +} +#endif + void __init pas_pci_init(void) { struct device_node *np, *root;