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)
202 reg
= readb(csr_int_mask
);
203 reg
= reg
| ENUM_INT_MASK
;
204 writeb(reg
, csr_int_mask
);
208 static int zt5550_hc_init_one (struct pci_dev
*pdev
, const struct pci_device_id
*ent
)
212 status
= zt5550_hc_config(pdev
);
216 dbg("returned from zt5550_hc_config");
218 memset(&zt5550_hpc
, 0, sizeof (struct cpci_hp_controller
));
219 zt5550_hpc_ops
.query_enum
= zt5550_hc_query_enum
;
220 zt5550_hpc
.ops
= &zt5550_hpc_ops
;
222 zt5550_hpc
.irq
= hc_dev
->irq
;
223 zt5550_hpc
.irq_flags
= IRQF_SHARED
;
224 zt5550_hpc
.dev_id
= hc_dev
;
226 zt5550_hpc_ops
.enable_irq
= zt5550_hc_enable_irq
;
227 zt5550_hpc_ops
.disable_irq
= zt5550_hc_disable_irq
;
228 zt5550_hpc_ops
.check_irq
= zt5550_hc_check_irq
;
230 info("using ENUM# polling mode");
233 status
= cpci_hp_register_controller(&zt5550_hpc
);
235 err("could not register cPCI hotplug controller");
238 dbg("registered controller");
240 /* Look for first device matching cPCI bus's bridge vendor and device IDs */
241 if(!(bus0_dev
= pci_get_device(PCI_VENDOR_ID_DEC
,
242 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");