![Tim Schmielau](/assets/img/avatar_default.png)
I recently picked up my older work to remove unnecessary #includes of sched.h, starting from a patch by Dave Jones to not include sched.h from module.h. This reduces the number of indirect includes of sched.h by ~300. Another ~400 pointless direct includes can be removed after this disentangling (patch to follow later). However, quite a few indirect includes need to be fixed up for this. In order to feed the patches through -mm with as little disturbance as possible, I've split out the fixes I accumulated up to now (complete for i386 and x86_64, more archs to follow later) and post them before the real patch. This way this large part of the patch is kept simple with only adding #includes, and all hunks are independent of each other. So if any hunk rejects or gets in the way of other patches, just drop it. My scripts will pick it up again in the next round. Signed-off-by: Tim Schmielau <tim@physik3.uni-rostock.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
324 lines
8.3 KiB
C
324 lines
8.3 KiB
C
/*
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* cpcihp_zt5550.c
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*
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* Intel/Ziatech ZT5550 CompactPCI Host Controller driver
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*
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* Copyright 2002 SOMA Networks, Inc.
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* Copyright 2001 Intel San Luis Obispo
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* Copyright 2000,2001 MontaVista Software Inc.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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* THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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* Send feedback to <scottm@somanetworks.com>
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*/
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#include <linux/config.h>
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/init.h>
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#include <linux/errno.h>
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#include <linux/pci.h>
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#include <linux/signal.h> /* SA_SHIRQ */
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#include "cpci_hotplug.h"
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#include "cpcihp_zt5550.h"
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#define DRIVER_VERSION "0.2"
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#define DRIVER_AUTHOR "Scott Murray <scottm@somanetworks.com>"
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#define DRIVER_DESC "ZT5550 CompactPCI Hot Plug Driver"
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#define MY_NAME "cpcihp_zt5550"
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#define dbg(format, arg...) \
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do { \
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if(debug) \
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printk (KERN_DEBUG "%s: " format "\n", \
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MY_NAME , ## arg); \
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} while(0)
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#define err(format, arg...) printk(KERN_ERR "%s: " format "\n", MY_NAME , ## arg)
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#define info(format, arg...) printk(KERN_INFO "%s: " format "\n", MY_NAME , ## arg)
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#define warn(format, arg...) printk(KERN_WARNING "%s: " format "\n", MY_NAME , ## arg)
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/* local variables */
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static int debug;
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static int poll;
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static struct cpci_hp_controller_ops zt5550_hpc_ops;
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static struct cpci_hp_controller zt5550_hpc;
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/* Primary cPCI bus bridge device */
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static struct pci_dev *bus0_dev;
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static struct pci_bus *bus0;
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/* Host controller device */
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static struct pci_dev *hc_dev;
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/* Host controller register addresses */
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static void __iomem *hc_registers;
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static void __iomem *csr_hc_index;
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static void __iomem *csr_hc_data;
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static void __iomem *csr_int_status;
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static void __iomem *csr_int_mask;
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static int zt5550_hc_config(struct pci_dev *pdev)
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{
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int ret;
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/* Since we know that no boards exist with two HC chips, treat it as an error */
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if(hc_dev) {
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err("too many host controller devices?");
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return -EBUSY;
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}
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ret = pci_enable_device(pdev);
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if(ret) {
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err("cannot enable %s\n", pci_name(pdev));
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return ret;
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}
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hc_dev = pdev;
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dbg("hc_dev = %p", hc_dev);
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dbg("pci resource start %lx", pci_resource_start(hc_dev, 1));
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dbg("pci resource len %lx", pci_resource_len(hc_dev, 1));
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if(!request_mem_region(pci_resource_start(hc_dev, 1),
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pci_resource_len(hc_dev, 1), MY_NAME)) {
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err("cannot reserve MMIO region");
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ret = -ENOMEM;
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goto exit_disable_device;
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}
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hc_registers =
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ioremap(pci_resource_start(hc_dev, 1), pci_resource_len(hc_dev, 1));
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if(!hc_registers) {
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err("cannot remap MMIO region %lx @ %lx",
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pci_resource_len(hc_dev, 1), pci_resource_start(hc_dev, 1));
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ret = -ENODEV;
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goto exit_release_region;
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}
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csr_hc_index = hc_registers + CSR_HCINDEX;
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csr_hc_data = hc_registers + CSR_HCDATA;
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csr_int_status = hc_registers + CSR_INTSTAT;
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csr_int_mask = hc_registers + CSR_INTMASK;
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/*
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* Disable host control, fault and serial interrupts
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*/
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dbg("disabling host control, fault and serial interrupts");
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writeb((u8) HC_INT_MASK_REG, csr_hc_index);
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writeb((u8) ALL_INDEXED_INTS_MASK, csr_hc_data);
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dbg("disabled host control, fault and serial interrupts");
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/*
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* Disable timer0, timer1 and ENUM interrupts
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*/
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dbg("disabling timer0, timer1 and ENUM interrupts");
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writeb((u8) ALL_DIRECT_INTS_MASK, csr_int_mask);
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dbg("disabled timer0, timer1 and ENUM interrupts");
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return 0;
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exit_release_region:
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release_mem_region(pci_resource_start(hc_dev, 1),
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pci_resource_len(hc_dev, 1));
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exit_disable_device:
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pci_disable_device(hc_dev);
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return ret;
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}
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static int zt5550_hc_cleanup(void)
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{
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if(!hc_dev)
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return -ENODEV;
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iounmap(hc_registers);
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release_mem_region(pci_resource_start(hc_dev, 1),
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pci_resource_len(hc_dev, 1));
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pci_disable_device(hc_dev);
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return 0;
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}
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static int zt5550_hc_query_enum(void)
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{
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u8 value;
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value = inb_p(ENUM_PORT);
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return ((value & ENUM_MASK) == ENUM_MASK);
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}
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static int zt5550_hc_check_irq(void *dev_id)
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{
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int ret;
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u8 reg;
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ret = 0;
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if(dev_id == zt5550_hpc.dev_id) {
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reg = readb(csr_int_status);
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if(reg)
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ret = 1;
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}
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return ret;
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}
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static int zt5550_hc_enable_irq(void)
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{
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u8 reg;
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if(hc_dev == NULL) {
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return -ENODEV;
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}
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reg = readb(csr_int_mask);
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reg = reg & ~ENUM_INT_MASK;
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writeb(reg, csr_int_mask);
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return 0;
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}
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static int zt5550_hc_disable_irq(void)
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{
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u8 reg;
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if(hc_dev == NULL) {
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return -ENODEV;
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}
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reg = readb(csr_int_mask);
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reg = reg | ENUM_INT_MASK;
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writeb(reg, csr_int_mask);
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return 0;
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}
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static int zt5550_hc_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
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{
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int status;
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status = zt5550_hc_config(pdev);
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if(status != 0) {
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return status;
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}
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dbg("returned from zt5550_hc_config");
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memset(&zt5550_hpc, 0, sizeof (struct cpci_hp_controller));
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zt5550_hpc_ops.query_enum = zt5550_hc_query_enum;
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zt5550_hpc.ops = &zt5550_hpc_ops;
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if(!poll) {
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zt5550_hpc.irq = hc_dev->irq;
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zt5550_hpc.irq_flags = SA_SHIRQ;
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zt5550_hpc.dev_id = hc_dev;
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zt5550_hpc_ops.enable_irq = zt5550_hc_enable_irq;
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zt5550_hpc_ops.disable_irq = zt5550_hc_disable_irq;
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zt5550_hpc_ops.check_irq = zt5550_hc_check_irq;
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} else {
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info("using ENUM# polling mode");
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}
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status = cpci_hp_register_controller(&zt5550_hpc);
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if(status != 0) {
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err("could not register cPCI hotplug controller");
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goto init_hc_error;
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}
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dbg("registered controller");
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/* Look for first device matching cPCI bus's bridge vendor and device IDs */
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if(!(bus0_dev = pci_get_device(PCI_VENDOR_ID_DEC,
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PCI_DEVICE_ID_DEC_21154, NULL))) {
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status = -ENODEV;
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goto init_register_error;
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}
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bus0 = bus0_dev->subordinate;
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pci_dev_put(bus0_dev);
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status = cpci_hp_register_bus(bus0, 0x0a, 0x0f);
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if(status != 0) {
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err("could not register cPCI hotplug bus");
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goto init_register_error;
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}
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dbg("registered bus");
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status = cpci_hp_start();
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if(status != 0) {
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err("could not started cPCI hotplug system");
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cpci_hp_unregister_bus(bus0);
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goto init_register_error;
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}
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dbg("started cpci hp system");
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return 0;
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init_register_error:
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cpci_hp_unregister_controller(&zt5550_hpc);
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init_hc_error:
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err("status = %d", status);
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zt5550_hc_cleanup();
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return status;
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}
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static void __devexit zt5550_hc_remove_one(struct pci_dev *pdev)
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{
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cpci_hp_stop();
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cpci_hp_unregister_bus(bus0);
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cpci_hp_unregister_controller(&zt5550_hpc);
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zt5550_hc_cleanup();
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}
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static struct pci_device_id zt5550_hc_pci_tbl[] = {
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{ PCI_VENDOR_ID_ZIATECH, PCI_DEVICE_ID_ZIATECH_5550_HC, PCI_ANY_ID, PCI_ANY_ID, },
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{ 0, }
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};
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MODULE_DEVICE_TABLE(pci, zt5550_hc_pci_tbl);
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static struct pci_driver zt5550_hc_driver = {
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.name = "zt5550_hc",
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.id_table = zt5550_hc_pci_tbl,
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.probe = zt5550_hc_init_one,
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.remove = __devexit_p(zt5550_hc_remove_one),
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};
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static int __init zt5550_init(void)
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{
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struct resource* r;
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info(DRIVER_DESC " version: " DRIVER_VERSION);
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r = request_region(ENUM_PORT, 1, "#ENUM hotswap signal register");
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if(!r)
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return -EBUSY;
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return pci_register_driver(&zt5550_hc_driver);
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}
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static void __exit
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zt5550_exit(void)
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{
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pci_unregister_driver(&zt5550_hc_driver);
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release_region(ENUM_PORT, 1);
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}
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module_init(zt5550_init);
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module_exit(zt5550_exit);
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MODULE_AUTHOR(DRIVER_AUTHOR);
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MODULE_DESCRIPTION(DRIVER_DESC);
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MODULE_LICENSE("GPL");
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module_param(debug, bool, 0644);
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MODULE_PARM_DESC(debug, "Debugging mode enabled or not");
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module_param(poll, bool, 0644);
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MODULE_PARM_DESC(poll, "#ENUM polling mode enabled or not");
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