4 * Intel/Ziatech ZT5550 CompactPCI Host Controller driver
6 * Copyright 2002 SOMA Networks, Inc.
7 * Copyright 2001 Intel San Luis Obispo
8 * Copyright 2000,2001 MontaVista Software Inc.
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License as published by the
12 * Free Software Foundation; either version 2 of the License, or (at your
13 * option) any later version.
15 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
16 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
17 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
18 * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
19 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
20 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
21 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
22 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
23 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
24 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 * You should have received a copy of the GNU General Public License along
27 * with this program; if not, write to the Free Software Foundation, Inc.,
28 * 675 Mass Ave, Cambridge, MA 02139, USA.
30 * Send feedback to <scottm@somanetworks.com>
33 #include <linux/module.h>
34 #include <linux/moduleparam.h>
35 #include <linux/init.h>
36 #include <linux/errno.h>
37 #include <linux/pci.h>
38 #include <linux/interrupt.h>
39 #include <linux/signal.h> /* IRQF_SHARED */
40 #include "cpci_hotplug.h"
41 #include "cpcihp_zt5550.h"
43 #define DRIVER_VERSION "0.2"
44 #define DRIVER_AUTHOR "Scott Murray <scottm@somanetworks.com>"
45 #define DRIVER_DESC "ZT5550 CompactPCI Hot Plug Driver"
47 #define MY_NAME "cpcihp_zt5550"
49 #define dbg(format, arg...) \
52 printk (KERN_DEBUG "%s: " format "\n", \
55 #define err(format, arg...) printk(KERN_ERR "%s: " format "\n", MY_NAME , ## arg)
56 #define info(format, arg...) printk(KERN_INFO "%s: " format "\n", MY_NAME , ## arg)
57 #define warn(format, arg...) printk(KERN_WARNING "%s: " format "\n", MY_NAME , ## arg)
62 static struct cpci_hp_controller_ops zt5550_hpc_ops;
63 static struct cpci_hp_controller zt5550_hpc;
65 /* Primary cPCI bus bridge device */
66 static struct pci_dev *bus0_dev;
67 static struct pci_bus *bus0;
69 /* Host controller device */
70 static struct pci_dev *hc_dev;
72 /* Host controller register addresses */
73 static void __iomem *hc_registers;
74 static void __iomem *csr_hc_index;
75 static void __iomem *csr_hc_data;
76 static void __iomem *csr_int_status;
77 static void __iomem *csr_int_mask;
80 static int zt5550_hc_config(struct pci_dev *pdev)
84 /* Since we know that no boards exist with two HC chips, treat it as an error */
86 err("too many host controller devices?");
90 ret = pci_enable_device(pdev);
92 err("cannot enable %s\n", pci_name(pdev));
97 dbg("hc_dev = %p", hc_dev);
98 dbg("pci resource start %llx", (unsigned long long)pci_resource_start(hc_dev, 1));
99 dbg("pci resource len %llx", (unsigned long long)pci_resource_len(hc_dev, 1));
101 if (!request_mem_region(pci_resource_start(hc_dev, 1),
102 pci_resource_len(hc_dev, 1), MY_NAME)) {
103 err("cannot reserve MMIO region");
105 goto exit_disable_device;
109 ioremap(pci_resource_start(hc_dev, 1), pci_resource_len(hc_dev, 1));
111 err("cannot remap MMIO region %llx @ %llx",
112 (unsigned long long)pci_resource_len(hc_dev, 1),
113 (unsigned long long)pci_resource_start(hc_dev, 1));
115 goto exit_release_region;
118 csr_hc_index = hc_registers + CSR_HCINDEX;
119 csr_hc_data = hc_registers + CSR_HCDATA;
120 csr_int_status = hc_registers + CSR_INTSTAT;
121 csr_int_mask = hc_registers + CSR_INTMASK;
124 * Disable host control, fault and serial interrupts
126 dbg("disabling host control, fault and serial interrupts");
127 writeb((u8) HC_INT_MASK_REG, csr_hc_index);
128 writeb((u8) ALL_INDEXED_INTS_MASK, csr_hc_data);
129 dbg("disabled host control, fault and serial interrupts");
132 * Disable timer0, timer1 and ENUM interrupts
134 dbg("disabling timer0, timer1 and ENUM interrupts");
135 writeb((u8) ALL_DIRECT_INTS_MASK, csr_int_mask);
136 dbg("disabled timer0, timer1 and ENUM interrupts");
140 release_mem_region(pci_resource_start(hc_dev, 1),
141 pci_resource_len(hc_dev, 1));
143 pci_disable_device(hc_dev);
147 static int zt5550_hc_cleanup(void)
152 iounmap(hc_registers);
153 release_mem_region(pci_resource_start(hc_dev, 1),
154 pci_resource_len(hc_dev, 1));
155 pci_disable_device(hc_dev);
159 static int zt5550_hc_query_enum(void)
163 value = inb_p(ENUM_PORT);
164 return ((value & ENUM_MASK) == ENUM_MASK);
167 static int zt5550_hc_check_irq(void *dev_id)
173 if (dev_id == zt5550_hpc.dev_id) {
174 reg = readb(csr_int_status);
181 static int zt5550_hc_enable_irq(void)
188 reg = readb(csr_int_mask);
189 reg = reg & ~ENUM_INT_MASK;
190 writeb(reg, csr_int_mask);
194 static int zt5550_hc_disable_irq(void)
201 reg = readb(csr_int_mask);
202 reg = reg | ENUM_INT_MASK;
203 writeb(reg, csr_int_mask);
207 static int zt5550_hc_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
211 status = zt5550_hc_config(pdev);
215 dbg("returned from zt5550_hc_config");
217 memset(&zt5550_hpc, 0, sizeof (struct cpci_hp_controller));
218 zt5550_hpc_ops.query_enum = zt5550_hc_query_enum;
219 zt5550_hpc.ops = &zt5550_hpc_ops;
221 zt5550_hpc.irq = hc_dev->irq;
222 zt5550_hpc.irq_flags = IRQF_SHARED;
223 zt5550_hpc.dev_id = hc_dev;
225 zt5550_hpc_ops.enable_irq = zt5550_hc_enable_irq;
226 zt5550_hpc_ops.disable_irq = zt5550_hc_disable_irq;
227 zt5550_hpc_ops.check_irq = zt5550_hc_check_irq;
229 info("using ENUM# polling mode");
232 status = cpci_hp_register_controller(&zt5550_hpc);
234 err("could not register cPCI hotplug controller");
237 dbg("registered controller");
239 /* Look for first device matching cPCI bus's bridge vendor and device IDs */
240 bus0_dev = pci_get_device(PCI_VENDOR_ID_DEC,
241 PCI_DEVICE_ID_DEC_21154, NULL);
244 goto init_register_error;
246 bus0 = bus0_dev->subordinate;
247 pci_dev_put(bus0_dev);
249 status = cpci_hp_register_bus(bus0, 0x0a, 0x0f);
251 err("could not register cPCI hotplug bus");
252 goto init_register_error;
254 dbg("registered bus");
256 status = cpci_hp_start();
258 err("could not started cPCI hotplug system");
259 cpci_hp_unregister_bus(bus0);
260 goto init_register_error;
262 dbg("started cpci hp system");
266 cpci_hp_unregister_controller(&zt5550_hpc);
268 err("status = %d", status);
274 static void zt5550_hc_remove_one(struct pci_dev *pdev)
277 cpci_hp_unregister_bus(bus0);
278 cpci_hp_unregister_controller(&zt5550_hpc);
283 static struct pci_device_id zt5550_hc_pci_tbl[] = {
284 { PCI_VENDOR_ID_ZIATECH, PCI_DEVICE_ID_ZIATECH_5550_HC, PCI_ANY_ID, PCI_ANY_ID, },
287 MODULE_DEVICE_TABLE(pci, zt5550_hc_pci_tbl);
289 static struct pci_driver zt5550_hc_driver = {
291 .id_table = zt5550_hc_pci_tbl,
292 .probe = zt5550_hc_init_one,
293 .remove = zt5550_hc_remove_one,
296 static int __init zt5550_init(void)
301 info(DRIVER_DESC " version: " DRIVER_VERSION);
302 r = request_region(ENUM_PORT, 1, "#ENUM hotswap signal register");
306 rc = pci_register_driver(&zt5550_hc_driver);
308 release_region(ENUM_PORT, 1);
315 pci_unregister_driver(&zt5550_hc_driver);
316 release_region(ENUM_PORT, 1);
319 module_init(zt5550_init);
320 module_exit(zt5550_exit);
322 MODULE_AUTHOR(DRIVER_AUTHOR);
323 MODULE_DESCRIPTION(DRIVER_DESC);
324 MODULE_LICENSE("GPL");
325 module_param(debug, bool, 0644);
326 MODULE_PARM_DESC(debug, "Debugging mode enabled or not");
327 module_param(poll, bool, 0644);
328 MODULE_PARM_DESC(poll, "#ENUM polling mode enabled or not");