diff options
author | 2015-08-04 12:17:53 -0700 | |
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committer | 2015-08-04 15:44:42 -0700 | |
commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/drivers/eisa/pci_eisa.c | |
parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) |
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base.
It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:
commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.
Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/drivers/eisa/pci_eisa.c')
-rw-r--r-- | kernel/drivers/eisa/pci_eisa.c | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/kernel/drivers/eisa/pci_eisa.c b/kernel/drivers/eisa/pci_eisa.c new file mode 100644 index 000000000..a333bf351 --- /dev/null +++ b/kernel/drivers/eisa/pci_eisa.c @@ -0,0 +1,90 @@ +/* + * Minimalist driver for a generic PCI-to-EISA bridge. + * + * (C) 2003 Marc Zyngier <maz@wild-wind.fr.eu.org> + * + * This code is released under the GPL version 2. + * + * Ivan Kokshaysky <ink@jurassic.park.msu.ru> : + * Generalisation from i82375 to PCI_CLASS_BRIDGE_EISA. + */ + +#include <linux/kernel.h> +#include <linux/device.h> +#include <linux/eisa.h> +#include <linux/pci.h> +#include <linux/module.h> +#include <linux/init.h> + +/* There is only *one* pci_eisa device per machine, right ? */ +static struct eisa_root_device pci_eisa_root; + +static int __init pci_eisa_init(struct pci_dev *pdev) +{ + int rc, i; + struct resource *res, *bus_res = NULL; + + if ((rc = pci_enable_device (pdev))) { + dev_err(&pdev->dev, "Could not enable device\n"); + return rc; + } + + /* + * The Intel 82375 PCI-EISA bridge is a subtractive-decode PCI + * device, so the resources available on EISA are the same as those + * available on the 82375 bus. This works the same as a PCI-PCI + * bridge in subtractive-decode mode (see pci_read_bridge_bases()). + * We assume other PCI-EISA bridges are similar. + * + * eisa_root_register() can only deal with a single io port resource, + * so we use the first valid io port resource. + */ + pci_bus_for_each_resource(pdev->bus, res, i) + if (res && (res->flags & IORESOURCE_IO)) { + bus_res = res; + break; + } + + if (!bus_res) { + dev_err(&pdev->dev, "No resources available\n"); + return -1; + } + + pci_eisa_root.dev = &pdev->dev; + pci_eisa_root.res = bus_res; + pci_eisa_root.bus_base_addr = bus_res->start; + pci_eisa_root.slots = EISA_MAX_SLOTS; + pci_eisa_root.dma_mask = pdev->dma_mask; + dev_set_drvdata(pci_eisa_root.dev, &pci_eisa_root); + + if (eisa_root_register (&pci_eisa_root)) { + dev_err(&pdev->dev, "Could not register EISA root\n"); + return -1; + } + + return 0; +} + +/* + * We have to call pci_eisa_init_early() before pnpacpi_init()/isapnp_init(). + * Otherwise pnp resource will get enabled early and could prevent eisa + * to be initialized. + * Also need to make sure pci_eisa_init_early() is called after + * x86/pci_subsys_init(). + * So need to use subsys_initcall_sync with it. + */ +static int __init pci_eisa_init_early(void) +{ + struct pci_dev *dev = NULL; + int ret; + + for_each_pci_dev(dev) + if ((dev->class >> 8) == PCI_CLASS_BRIDGE_EISA) { + ret = pci_eisa_init(dev); + if (ret) + return ret; + } + + return 0; +} +subsys_initcall_sync(pci_eisa_init_early); |