Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 305 insertions, 0 deletions

diff --git a/drivers/pci/hotplug/cpcihp_zt5550.c b/drivers/pci/hotplug/cpcihp_zt5550.c
new file mode 100644
index 000000000000..e9928024be78
--- /dev/null
+++ b/drivers/pci/hotplug/cpcihp_zt5550.c
@@ -0,0 +1,305 @@
+/*
+ * cpcihp_zt5550.c
+ *
+ * Intel/Ziatech ZT5550 CompactPCI Host Controller driver
+ *
+ * Copyright 2002 SOMA Networks, Inc.
+ * Copyright 2001 Intel San Luis Obispo
+ * Copyright 2000,2001 MontaVista Software 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.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
+ * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY 
+ * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 
+ * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * Send feedback to <scottm@somanetworks.com>
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/init.h>
+#include <linux/errno.h>
+#include <linux/pci.h>
+#include "cpci_hotplug.h"
+#include "cpcihp_zt5550.h"
+
+#define DRIVER_VERSION  "0.2"
+#define DRIVER_AUTHOR   "Scott Murray <scottm@somanetworks.com>"
+#define DRIVER_DESC     "ZT5550 CompactPCI Hot Plug Driver"
+
+#define MY_NAME "cpcihp_zt5550"
+
+#define dbg(format, arg...)                                     \
+        do {                                                    \
+                if(debug)                                       \
+                        printk (KERN_DEBUG "%s: " format "\n",  \
+                                MY_NAME , ## arg);              \
+        } while(0)
+#define err(format, arg...) printk(KERN_ERR "%s: " format "\n", MY_NAME , ## arg)
+#define info(format, arg...) printk(KERN_INFO "%s: " format "\n", MY_NAME , ## arg)
+#define warn(format, arg...) printk(KERN_WARNING "%s: " format "\n", MY_NAME , ## arg)
+
+/* local variables */
+static int debug;
+static int poll;
+static struct cpci_hp_controller_ops zt5550_hpc_ops;
+static struct cpci_hp_controller zt5550_hpc;
+
+/* Primary cPCI bus bridge device */
+static struct pci_dev *bus0_dev;
+static struct pci_bus *bus0;
+
+/* Host controller device */
+static struct pci_dev *hc_dev;
+
+/* Host controller register addresses */
+static void __iomem *hc_registers;
+static void __iomem *csr_hc_index;
+static void __iomem *csr_hc_data;
+static void __iomem *csr_int_status;
+static void __iomem *csr_int_mask;
+
+
+static int zt5550_hc_config(struct pci_dev *pdev)
+{
+        /* Since we know that no boards exist with two HC chips, treat it as an error */
+        if(hc_dev) {
+                err("too many host controller devices?");
+                return -EBUSY;
+        }
+        hc_dev = pdev;
+        dbg("hc_dev = %p", hc_dev);
+        dbg("pci resource start %lx", pci_resource_start(hc_dev, 1));
+        dbg("pci resource len %lx", pci_resource_len(hc_dev, 1));
+
+        if(!request_mem_region(pci_resource_start(hc_dev, 1),
+                                pci_resource_len(hc_dev, 1), MY_NAME)) {
+                err("cannot reserve MMIO region");
+                return -ENOMEM;
+        }
+
+        hc_registers =
+            ioremap(pci_resource_start(hc_dev, 1), pci_resource_len(hc_dev, 1));
+        if(!hc_registers) {
+                err("cannot remap MMIO region %lx @ %lx",
+                    pci_resource_len(hc_dev, 1), pci_resource_start(hc_dev, 1));
+                release_mem_region(pci_resource_start(hc_dev, 1),
+                                   pci_resource_len(hc_dev, 1));
+                return -ENODEV;
+        }
+
+        csr_hc_index = hc_registers + CSR_HCINDEX;
+        csr_hc_data = hc_registers + CSR_HCDATA;
+        csr_int_status = hc_registers + CSR_INTSTAT;
+        csr_int_mask = hc_registers + CSR_INTMASK;
+
+        /*
+         * Disable host control, fault and serial interrupts
+         */
+        dbg("disabling host control, fault and serial interrupts");
+        writeb((u8) HC_INT_MASK_REG, csr_hc_index);
+        writeb((u8) ALL_INDEXED_INTS_MASK, csr_hc_data);
+        dbg("disabled host control, fault and serial interrupts");
+
+        /*
+         * Disable timer0, timer1 and ENUM interrupts
+         */
+        dbg("disabling timer0, timer1 and ENUM interrupts");
+        writeb((u8) ALL_DIRECT_INTS_MASK, csr_int_mask);
+        dbg("disabled timer0, timer1 and ENUM interrupts");
+        return 0;
+}
+
+static int zt5550_hc_cleanup(void)
+{
+        if(!hc_dev)
+                return -ENODEV;
+
+        iounmap(hc_registers);
+        release_mem_region(pci_resource_start(hc_dev, 1),
+                           pci_resource_len(hc_dev, 1));
+        return 0;
+}
+
+static int zt5550_hc_query_enum(void)
+{
+        u8 value;
+
+        value = inb_p(ENUM_PORT);
+        return ((value & ENUM_MASK) == ENUM_MASK);
+}
+
+static int zt5550_hc_check_irq(void *dev_id)
+{
+        int ret;
+        u8 reg;
+
+        ret = 0;
+        if(dev_id == zt5550_hpc.dev_id) {
+                reg = readb(csr_int_status);
+                if(reg)
+                        ret = 1;
+        }
+        return ret;
+}
+
+static int zt5550_hc_enable_irq(void)
+{
+        u8 reg;
+
+        if(hc_dev == NULL) {
+                return -ENODEV;
+        }
+        reg = readb(csr_int_mask);
+        reg = reg & ~ENUM_INT_MASK;
+        writeb(reg, csr_int_mask);
+        return 0;
+}
+
+static int zt5550_hc_disable_irq(void)
+{
+        u8 reg;
+
+        if(hc_dev == NULL) {
+                return -ENODEV;
+        }
+
+        reg = readb(csr_int_mask);
+        reg = reg | ENUM_INT_MASK;
+        writeb(reg, csr_int_mask);
+        return 0;
+}
+
+static int zt5550_hc_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
+{
+        int status;
+
+        status = zt5550_hc_config(pdev);
+        if(status != 0) {
+                return status;
+        }
+        dbg("returned from zt5550_hc_config");
+
+        memset(&zt5550_hpc, 0, sizeof (struct cpci_hp_controller));
+        zt5550_hpc_ops.query_enum = zt5550_hc_query_enum;
+        zt5550_hpc.ops = &zt5550_hpc_ops;
+        if(!poll) {
+                zt5550_hpc.irq = hc_dev->irq;
+                zt5550_hpc.irq_flags = SA_SHIRQ;
+                zt5550_hpc.dev_id = hc_dev;
+
+                zt5550_hpc_ops.enable_irq = zt5550_hc_enable_irq;
+                zt5550_hpc_ops.disable_irq = zt5550_hc_disable_irq;
+                zt5550_hpc_ops.check_irq = zt5550_hc_check_irq;
+        } else {
+                info("using ENUM# polling mode");
+        }
+
+        status = cpci_hp_register_controller(&zt5550_hpc);
+        if(status != 0) {
+                err("could not register cPCI hotplug controller");
+                goto init_hc_error;
+        }
+        dbg("registered controller");
+
+        /* Look for first device matching cPCI bus's bridge vendor and device IDs */
+        if(!(bus0_dev = pci_get_device(PCI_VENDOR_ID_DEC,
+                                         PCI_DEVICE_ID_DEC_21154, NULL))) {
+                status = -ENODEV;
+                goto init_register_error;
+        }
+        bus0 = bus0_dev->subordinate;
+        pci_dev_put(bus0_dev);
+
+        status = cpci_hp_register_bus(bus0, 0x0a, 0x0f);
+        if(status != 0) {
+                err("could not register cPCI hotplug bus");
+                goto init_register_error;
+        }
+        dbg("registered bus");
+
+        status = cpci_hp_start();
+        if(status != 0) {
+                err("could not started cPCI hotplug system");
+                cpci_hp_unregister_bus(bus0);
+                goto init_register_error;
+        }
+        dbg("started cpci hp system");
+
+        return 0;
+init_register_error:
+        cpci_hp_unregister_controller(&zt5550_hpc);
+init_hc_error:
+        err("status = %d", status);
+        zt5550_hc_cleanup();
+        return status;
+
+}
+
+static void __devexit zt5550_hc_remove_one(struct pci_dev *pdev)
+{
+        cpci_hp_stop();
+        cpci_hp_unregister_bus(bus0);
+        cpci_hp_unregister_controller(&zt5550_hpc);
+        zt5550_hc_cleanup();
+}
+
+
+static struct pci_device_id zt5550_hc_pci_tbl[] = {
+        { PCI_VENDOR_ID_ZIATECH, PCI_DEVICE_ID_ZIATECH_5550_HC, PCI_ANY_ID, PCI_ANY_ID, },
+        { 0, }
+};
+MODULE_DEVICE_TABLE(pci, zt5550_hc_pci_tbl);
+        
+static struct pci_driver zt5550_hc_driver = {
+        .name           = "zt5550_hc",
+        .id_table       = zt5550_hc_pci_tbl,
+        .probe          = zt5550_hc_init_one,
+        .remove         = __devexit_p(zt5550_hc_remove_one),
+};
+
+static int __init zt5550_init(void)
+{
+        struct resource* r;
+
+        info(DRIVER_DESC " version: " DRIVER_VERSION);
+        r = request_region(ENUM_PORT, 1, "#ENUM hotswap signal register");
+        if(!r)
+                return -EBUSY;
+
+        return pci_register_driver(&zt5550_hc_driver);
+}
+
+static void __exit
+zt5550_exit(void)
+{
+        pci_unregister_driver(&zt5550_hc_driver);
+        release_region(ENUM_PORT, 1);
+}
+
+module_init(zt5550_init);
+module_exit(zt5550_exit);
+
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");
+module_param(debug, bool, 0644);
+MODULE_PARM_DESC(debug, "Debugging mode enabled or not");
+module_param(poll, bool, 0644);
+MODULE_PARM_DESC(poll, "#ENUM polling mode enabled or not");