2 * SBE 2T3E3 synchronous serial card driver for Linux
4 * Copyright (C) 2009-2010 Krzysztof Halasa <khc@pm.waw.pl>
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of version 2 of the GNU General Public License
8 * as published by the Free Software Foundation.
10 * This code is based on a driver written by SBE Inc.
13 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
15 #include <linux/module.h>
16 #include <linux/slab.h>
17 #include <linux/delay.h>
18 #include <linux/netdevice.h>
19 #include <linux/pci.h>
20 #include <linux/hdlc.h>
21 #include <linux/if_arp.h>
22 #include <linux/interrupt.h>
25 static void check_leds(unsigned long arg)
27 struct card *card = (struct card *)arg;
28 struct channel *channel0 = &card->channels[0];
31 update_led(channel0, ++blinker);
32 if (has_two_ports(channel0->pdev))
33 update_led(&card->channels[1], blinker);
35 card->timer.expires = jiffies + HZ / 10;
36 add_timer(&card->timer);
39 static void t3e3_remove_channel(struct channel *channel)
41 struct pci_dev *pdev = channel->pdev;
42 struct net_device *dev = channel->dev;
44 /* system hangs if board asserts irq while module is unloaded */
45 cpld_stop_intr(channel);
46 free_irq(dev->irq, dev);
47 dc_drop_descriptor_list(channel);
48 unregister_hdlc_device(dev);
50 pci_release_regions(pdev);
51 pci_disable_device(pdev);
52 pci_set_drvdata(pdev, NULL);
55 static int t3e3_init_channel(struct channel *channel, struct pci_dev *pdev, struct card *card)
57 struct net_device *dev;
61 err = pci_enable_device(pdev);
65 err = pci_request_regions(pdev, "SBE 2T3E3");
69 dev = alloc_hdlcdev(channel);
71 pr_err("Out of memory\n");
76 t3e3_sc_init(channel);
77 dev_to_priv(dev) = channel;
82 channel->addr = pci_resource_start(pdev, 0);
83 if (pdev->subsystem_device == PCI_SUBDEVICE_ID_SBE_2T3E3_P1)
88 err = setup_device(dev, channel);
92 pci_read_config_dword(channel->pdev, 0x40, &val); /* mask sleep mode */
93 pci_write_config_dword(channel->pdev, 0x40, val & 0x3FFFFFFF);
95 pci_read_config_byte(channel->pdev, PCI_CACHE_LINE_SIZE, &channel->h.cache_size);
96 pci_read_config_dword(channel->pdev, PCI_COMMAND, &channel->h.command);
99 err = request_irq(dev->irq, &t3e3_intr, IRQF_SHARED, dev->name, dev);
101 netdev_warn(channel->dev, "%s: could not get irq: %d\n",
102 dev->name, dev->irq);
106 pci_set_drvdata(pdev, channel);
110 unregister_hdlc_device(dev);
114 pci_release_regions(pdev);
116 pci_disable_device(pdev);
120 static void t3e3_remove_card(struct pci_dev *pdev)
122 struct channel *channel0 = pci_get_drvdata(pdev);
123 struct card *card = channel0->card;
125 del_timer_sync(&card->timer);
126 if (has_two_ports(channel0->pdev)) {
127 t3e3_remove_channel(&card->channels[1]);
128 pci_dev_put(card->channels[1].pdev);
130 t3e3_remove_channel(channel0);
134 static int t3e3_init_card(struct pci_dev *pdev, const struct pci_device_id *ent)
136 /* pdev points to channel #0 */
137 struct pci_dev *pdev1 = NULL;
139 int channels = 1, err;
141 if (has_two_ports(pdev)) {
142 while ((pdev1 = pci_get_subsys(PCI_VENDOR_ID_DEC, PCI_DEVICE_ID_DEC_21142,
143 PCI_VENDOR_ID_SBE, PCI_SUBDEVICE_ID_SBE_2T3E3_P1,
145 if (pdev1->bus == pdev->bus &&
146 pdev1->devfn == pdev->devfn + 8 /* next device on the same bus */)
147 break; /* found the second channel */
150 dev_err(&pdev->dev, "Can't find the second channel\n");
154 /* holds the reference for pdev1 */
157 card = kzalloc(sizeof(struct card) + channels * sizeof(struct channel),
162 spin_lock_init(&card->bootrom_lock);
163 card->bootrom_addr = pci_resource_start(pdev, 0);
165 err = t3e3_init_channel(&card->channels[0], pdev, card);
170 err = t3e3_init_channel(&card->channels[1], pdev1, card);
172 t3e3_remove_channel(&card->channels[0]);
177 /* start LED timer */
178 init_timer(&card->timer);
179 card->timer.function = check_leds;
180 card->timer.expires = jiffies + HZ / 10;
181 card->timer.data = (unsigned long)card;
182 add_timer(&card->timer);
190 static struct pci_device_id t3e3_pci_tbl[] = {
191 { PCI_VENDOR_ID_DEC, PCI_DEVICE_ID_DEC_21142,
192 PCI_VENDOR_ID_SBE, PCI_SUBDEVICE_ID_SBE_T3E3, 0, 0, 0 },
193 { PCI_VENDOR_ID_DEC, PCI_DEVICE_ID_DEC_21142,
194 PCI_VENDOR_ID_SBE, PCI_SUBDEVICE_ID_SBE_2T3E3_P0, 0, 0, 0 },
195 /* channel 1 will be initialized after channel 0 */
199 static struct pci_driver t3e3_pci_driver = {
201 .id_table = t3e3_pci_tbl,
202 .probe = t3e3_init_card,
203 .remove = t3e3_remove_card,
206 module_pci_driver(t3e3_pci_driver);
207 MODULE_LICENSE("GPL");
208 MODULE_DEVICE_TABLE(pci, t3e3_pci_tbl);