3 * A driver for Nokia Connectivity Card DTL-1 devices
5 * Copyright (C) 2001-2002 Marcel Holtmann <marcel@holtmann.org>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation;
12 * Software distributed under the License is distributed on an "AS
13 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
14 * implied. See the License for the specific language governing
15 * rights and limitations under the License.
17 * The initial developer of the original code is David A. Hinds
18 * <dahinds@users.sourceforge.net>. Portions created by David A. Hinds
19 * are Copyright (C) 1999 David A. Hinds. All Rights Reserved.
23 #include <linux/config.h>
24 #include <linux/module.h>
26 #include <linux/kernel.h>
27 #include <linux/init.h>
28 #include <linux/slab.h>
29 #include <linux/types.h>
30 #include <linux/sched.h>
31 #include <linux/errno.h>
32 #include <linux/ptrace.h>
33 #include <linux/ioport.h>
34 #include <linux/spinlock.h>
36 #include <linux/skbuff.h>
37 #include <linux/string.h>
38 #include <linux/serial.h>
39 #include <linux/serial_reg.h>
40 #include <asm/system.h>
41 #include <asm/bitops.h>
44 #include <pcmcia/version.h>
45 #include <pcmcia/cs_types.h>
46 #include <pcmcia/cs.h>
47 #include <pcmcia/cistpl.h>
48 #include <pcmcia/ciscode.h>
49 #include <pcmcia/ds.h>
50 #include <pcmcia/cisreg.h>
52 #include <net/bluetooth/bluetooth.h>
53 #include <net/bluetooth/hci_core.h>
57 /* ======================== Module parameters ======================== */
60 /* Bit map of interrupts to choose from */
61 static u_int irq_mask = 0xffff;
62 static int irq_list[4] = { -1 };
64 MODULE_PARM(irq_mask, "i");
65 MODULE_PARM(irq_list, "1-4i");
67 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
68 MODULE_DESCRIPTION("Bluetooth driver for Nokia Connectivity Card DTL-1");
69 MODULE_LICENSE("GPL");
73 /* ======================== Local structures ======================== */
76 typedef struct dtl1_info_t {
82 spinlock_t lock; /* For serializing operations */
84 unsigned long flowmask; /* HCI flow mask */
87 struct sk_buff_head txq;
88 unsigned long tx_state;
90 unsigned long rx_state;
91 unsigned long rx_count;
92 struct sk_buff *rx_skb;
96 void dtl1_config(dev_link_t *link);
97 void dtl1_release(dev_link_t *link);
98 int dtl1_event(event_t event, int priority, event_callback_args_t *args);
100 static dev_info_t dev_info = "dtl1_cs";
102 dev_link_t *dtl1_attach(void);
103 void dtl1_detach(dev_link_t *);
105 static dev_link_t *dev_list = NULL;
108 /* Transmit states */
109 #define XMIT_SENDING 1
110 #define XMIT_WAKEUP 2
111 #define XMIT_WAITING 8
113 /* Receiver States */
114 #define RECV_WAIT_NSH 0
115 #define RECV_WAIT_DATA 1
122 } __attribute__ ((packed)) nsh_t; /* Nokia Specific Header */
124 #define NSHL 4 /* Nokia Specific Header Length */
128 /* ======================== Interrupt handling ======================== */
131 static int dtl1_write(unsigned int iobase, int fifo_size, __u8 *buf, int len)
135 /* Tx FIFO should be empty */
136 if (!(inb(iobase + UART_LSR) & UART_LSR_THRE))
139 /* Fill FIFO with current frame */
140 while ((fifo_size-- > 0) && (actual < len)) {
141 /* Transmit next byte */
142 outb(buf[actual], iobase + UART_TX);
150 static void dtl1_write_wakeup(dtl1_info_t *info)
153 BT_ERR("Unknown device");
157 if (test_bit(XMIT_WAITING, &(info->tx_state))) {
158 set_bit(XMIT_WAKEUP, &(info->tx_state));
162 if (test_and_set_bit(XMIT_SENDING, &(info->tx_state))) {
163 set_bit(XMIT_WAKEUP, &(info->tx_state));
168 register unsigned int iobase = info->link.io.BasePort1;
169 register struct sk_buff *skb;
172 clear_bit(XMIT_WAKEUP, &(info->tx_state));
174 if (!(info->link.state & DEV_PRESENT))
177 if (!(skb = skb_dequeue(&(info->txq))))
181 len = dtl1_write(iobase, 32, skb->data, skb->len);
183 if (len == skb->len) {
184 set_bit(XMIT_WAITING, &(info->tx_state));
188 skb_queue_head(&(info->txq), skb);
191 info->hdev->stat.byte_tx += len;
193 } while (test_bit(XMIT_WAKEUP, &(info->tx_state)));
195 clear_bit(XMIT_SENDING, &(info->tx_state));
199 static void dtl1_control(dtl1_info_t *info, struct sk_buff *skb)
201 u8 flowmask = *(u8 *)skb->data;
204 printk(KERN_INFO "Bluetooth: Nokia control data =");
205 for (i = 0; i < skb->len; i++) {
206 printk(" %02x", skb->data[i]);
210 /* transition to active state */
211 if (((info->flowmask & 0x07) == 0) && ((flowmask & 0x07) != 0)) {
212 clear_bit(XMIT_WAITING, &(info->tx_state));
213 dtl1_write_wakeup(info);
216 info->flowmask = flowmask;
222 static void dtl1_receive(dtl1_info_t *info)
229 BT_ERR("Unknown device");
233 iobase = info->link.io.BasePort1;
236 info->hdev->stat.byte_rx++;
238 /* Allocate packet */
239 if (info->rx_skb == NULL)
240 if (!(info->rx_skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC))) {
241 BT_ERR("Can't allocate mem for new packet");
242 info->rx_state = RECV_WAIT_NSH;
243 info->rx_count = NSHL;
247 *skb_put(info->rx_skb, 1) = inb(iobase + UART_RX);
248 nsh = (nsh_t *)info->rx_skb->data;
252 if (info->rx_count == 0) {
254 switch (info->rx_state) {
256 info->rx_state = RECV_WAIT_DATA;
257 info->rx_count = nsh->len + (nsh->len & 0x0001);
260 info->rx_skb->pkt_type = nsh->type;
262 /* remove PAD byte if it exists */
263 if (nsh->len & 0x0001) {
264 info->rx_skb->tail--;
269 skb_pull(info->rx_skb, NSHL);
271 switch (info->rx_skb->pkt_type) {
273 /* control data for the Nokia Card */
274 dtl1_control(info, info->rx_skb);
279 /* send frame to the HCI layer */
280 info->rx_skb->dev = (void *) info->hdev;
281 info->rx_skb->pkt_type &= 0x0f;
282 hci_recv_frame(info->rx_skb);
286 BT_ERR("Unknown HCI packet with type 0x%02x received", info->rx_skb->pkt_type);
287 kfree_skb(info->rx_skb);
291 info->rx_state = RECV_WAIT_NSH;
292 info->rx_count = NSHL;
299 /* Make sure we don't stay here too long */
300 if (boguscount++ > 32)
303 } while (inb(iobase + UART_LSR) & UART_LSR_DR);
307 static irqreturn_t dtl1_interrupt(int irq, void *dev_inst, struct pt_regs *regs)
309 dtl1_info_t *info = dev_inst;
315 if (!info || !info->hdev) {
316 BT_ERR("Call of irq %d for unknown device", irq);
320 iobase = info->link.io.BasePort1;
322 spin_lock(&(info->lock));
324 iir = inb(iobase + UART_IIR) & UART_IIR_ID;
327 /* Clear interrupt */
328 lsr = inb(iobase + UART_LSR);
335 /* Receive interrupt */
339 if (lsr & UART_LSR_THRE) {
340 /* Transmitter ready for data */
341 dtl1_write_wakeup(info);
345 BT_ERR("Unhandled IIR=%#x", iir);
349 /* Make sure we don't stay here too long */
350 if (boguscount++ > 100)
353 iir = inb(iobase + UART_IIR) & UART_IIR_ID;
357 msr = inb(iobase + UART_MSR);
359 if (info->ri_latch ^ (msr & UART_MSR_RI)) {
360 info->ri_latch = msr & UART_MSR_RI;
361 clear_bit(XMIT_WAITING, &(info->tx_state));
362 dtl1_write_wakeup(info);
365 spin_unlock(&(info->lock));
372 /* ======================== HCI interface ======================== */
375 static int dtl1_hci_open(struct hci_dev *hdev)
377 set_bit(HCI_RUNNING, &(hdev->flags));
383 static int dtl1_hci_flush(struct hci_dev *hdev)
385 dtl1_info_t *info = (dtl1_info_t *)(hdev->driver_data);
388 skb_queue_purge(&(info->txq));
394 static int dtl1_hci_close(struct hci_dev *hdev)
396 if (!test_and_clear_bit(HCI_RUNNING, &(hdev->flags)))
399 dtl1_hci_flush(hdev);
405 static int dtl1_hci_send_frame(struct sk_buff *skb)
408 struct hci_dev *hdev = (struct hci_dev *)(skb->dev);
413 BT_ERR("Frame for unknown HCI device (hdev=NULL)");
417 info = (dtl1_info_t *)(hdev->driver_data);
419 switch (skb->pkt_type) {
420 case HCI_COMMAND_PKT:
424 case HCI_ACLDATA_PKT:
428 case HCI_SCODATA_PKT:
437 s = bt_skb_alloc(NSHL + skb->len + 1, GFP_ATOMIC);
438 skb_reserve(s, NSHL);
439 memcpy(skb_put(s, skb->len), skb->data, skb->len);
440 if (skb->len & 0x0001)
441 *skb_put(s, 1) = 0; /* PAD */
443 /* Prepend skb with Nokia frame header and queue */
444 memcpy(skb_push(s, NSHL), &nsh, NSHL);
445 skb_queue_tail(&(info->txq), s);
447 dtl1_write_wakeup(info);
455 static void dtl1_hci_destruct(struct hci_dev *hdev)
460 static int dtl1_hci_ioctl(struct hci_dev *hdev, unsigned int cmd, unsigned long arg)
467 /* ======================== Card services HCI interaction ======================== */
470 int dtl1_open(dtl1_info_t *info)
473 unsigned int iobase = info->link.io.BasePort1;
474 struct hci_dev *hdev;
476 spin_lock_init(&(info->lock));
478 skb_queue_head_init(&(info->txq));
480 info->rx_state = RECV_WAIT_NSH;
481 info->rx_count = NSHL;
484 set_bit(XMIT_WAITING, &(info->tx_state));
486 /* Initialize HCI device */
487 hdev = hci_alloc_dev();
489 BT_ERR("Can't allocate HCI device");
495 hdev->type = HCI_PCCARD;
496 hdev->driver_data = info;
498 hdev->open = dtl1_hci_open;
499 hdev->close = dtl1_hci_close;
500 hdev->flush = dtl1_hci_flush;
501 hdev->send = dtl1_hci_send_frame;
502 hdev->destruct = dtl1_hci_destruct;
503 hdev->ioctl = dtl1_hci_ioctl;
505 hdev->owner = THIS_MODULE;
507 spin_lock_irqsave(&(info->lock), flags);
510 outb(0, iobase + UART_MCR);
512 /* Turn off interrupts */
513 outb(0, iobase + UART_IER);
515 /* Initialize UART */
516 outb(UART_LCR_WLEN8, iobase + UART_LCR); /* Reset DLAB */
517 outb((UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2), iobase + UART_MCR);
519 info->ri_latch = inb(info->link.io.BasePort1 + UART_MSR) & UART_MSR_RI;
521 /* Turn on interrupts */
522 outb(UART_IER_RLSI | UART_IER_RDI | UART_IER_THRI, iobase + UART_IER);
524 spin_unlock_irqrestore(&(info->lock), flags);
526 /* Timeout before it is safe to send the first HCI packet */
527 set_current_state(TASK_INTERRUPTIBLE);
528 schedule_timeout(HZ * 2);
530 /* Register HCI device */
531 if (hci_register_dev(hdev) < 0) {
532 BT_ERR("Can't register HCI device");
542 int dtl1_close(dtl1_info_t *info)
545 unsigned int iobase = info->link.io.BasePort1;
546 struct hci_dev *hdev = info->hdev;
551 dtl1_hci_close(hdev);
553 spin_lock_irqsave(&(info->lock), flags);
556 outb(0, iobase + UART_MCR);
558 /* Turn off interrupts */
559 outb(0, iobase + UART_IER);
561 spin_unlock_irqrestore(&(info->lock), flags);
563 if (hci_unregister_dev(hdev) < 0)
564 BT_ERR("Can't unregister HCI device %s", hdev->name);
571 dev_link_t *dtl1_attach(void)
574 client_reg_t client_reg;
578 /* Create new info device */
579 info = kmalloc(sizeof(*info), GFP_KERNEL);
582 memset(info, 0, sizeof(*info));
587 link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
588 link->io.NumPorts1 = 8;
589 link->irq.Attributes = IRQ_TYPE_EXCLUSIVE | IRQ_HANDLE_PRESENT;
590 link->irq.IRQInfo1 = IRQ_INFO2_VALID | IRQ_LEVEL_ID;
592 if (irq_list[0] == -1)
593 link->irq.IRQInfo2 = irq_mask;
595 for (i = 0; i < 4; i++)
596 link->irq.IRQInfo2 |= 1 << irq_list[i];
598 link->irq.Handler = dtl1_interrupt;
599 link->irq.Instance = info;
601 link->conf.Attributes = CONF_ENABLE_IRQ;
603 link->conf.IntType = INT_MEMORY_AND_IO;
605 /* Register with Card Services */
606 link->next = dev_list;
608 client_reg.dev_info = &dev_info;
609 client_reg.Attributes = INFO_IO_CLIENT | INFO_CARD_SHARE;
610 client_reg.EventMask =
611 CS_EVENT_CARD_INSERTION | CS_EVENT_CARD_REMOVAL |
612 CS_EVENT_RESET_PHYSICAL | CS_EVENT_CARD_RESET |
613 CS_EVENT_PM_SUSPEND | CS_EVENT_PM_RESUME;
614 client_reg.event_handler = &dtl1_event;
615 client_reg.Version = 0x0210;
616 client_reg.event_callback_args.client_data = link;
618 ret = pcmcia_register_client(&link->handle, &client_reg);
619 if (ret != CS_SUCCESS) {
620 cs_error(link->handle, RegisterClient, ret);
629 void dtl1_detach(dev_link_t *link)
631 dtl1_info_t *info = link->priv;
635 /* Locate device structure */
636 for (linkp = &dev_list; *linkp; linkp = &(*linkp)->next)
643 if (link->state & DEV_CONFIG)
647 ret = pcmcia_deregister_client(link->handle);
648 if (ret != CS_SUCCESS)
649 cs_error(link->handle, DeregisterClient, ret);
652 /* Unlink device structure, free bits */
658 static int get_tuple(client_handle_t handle, tuple_t *tuple, cisparse_t *parse)
662 i = pcmcia_get_tuple_data(handle, tuple);
666 return pcmcia_parse_tuple(handle, tuple, parse);
669 static int first_tuple(client_handle_t handle, tuple_t *tuple, cisparse_t *parse)
671 if (pcmcia_get_first_tuple(handle, tuple) != CS_SUCCESS)
672 return CS_NO_MORE_ITEMS;
673 return get_tuple(handle, tuple, parse);
676 static int next_tuple(client_handle_t handle, tuple_t *tuple, cisparse_t *parse)
678 if (pcmcia_get_next_tuple(handle, tuple) != CS_SUCCESS)
679 return CS_NO_MORE_ITEMS;
680 return get_tuple(handle, tuple, parse);
683 void dtl1_config(dev_link_t *link)
685 client_handle_t handle = link->handle;
686 dtl1_info_t *info = link->priv;
690 cistpl_cftable_entry_t *cf = &parse.cftable_entry;
691 config_info_t config;
692 int i, last_ret, last_fn;
694 tuple.TupleData = (cisdata_t *)buf;
695 tuple.TupleOffset = 0;
696 tuple.TupleDataMax = 255;
697 tuple.Attributes = 0;
699 /* Get configuration register information */
700 tuple.DesiredTuple = CISTPL_CONFIG;
701 last_ret = first_tuple(handle, &tuple, &parse);
702 if (last_ret != CS_SUCCESS) {
703 last_fn = ParseTuple;
706 link->conf.ConfigBase = parse.config.base;
707 link->conf.Present = parse.config.rmask[0];
710 link->state |= DEV_CONFIG;
711 i = pcmcia_get_configuration_info(handle, &config);
712 link->conf.Vcc = config.Vcc;
714 tuple.TupleData = (cisdata_t *)buf;
715 tuple.TupleOffset = 0;
716 tuple.TupleDataMax = 255;
717 tuple.Attributes = 0;
718 tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
720 /* Look for a generic full-sized window */
721 link->io.NumPorts1 = 8;
722 i = first_tuple(handle, &tuple, &parse);
723 while (i != CS_NO_MORE_ITEMS) {
724 if ((i == CS_SUCCESS) && (cf->io.nwin == 1) && (cf->io.win[0].len > 8)) {
725 link->conf.ConfigIndex = cf->index;
726 link->io.BasePort1 = cf->io.win[0].base;
727 link->io.NumPorts1 = cf->io.win[0].len; /*yo */
728 link->io.IOAddrLines = cf->io.flags & CISTPL_IO_LINES_MASK;
729 i = pcmcia_request_io(link->handle, &link->io);
733 i = next_tuple(handle, &tuple, &parse);
736 if (i != CS_SUCCESS) {
737 cs_error(link->handle, RequestIO, i);
741 i = pcmcia_request_irq(link->handle, &link->irq);
742 if (i != CS_SUCCESS) {
743 cs_error(link->handle, RequestIRQ, i);
744 link->irq.AssignedIRQ = 0;
747 i = pcmcia_request_configuration(link->handle, &link->conf);
748 if (i != CS_SUCCESS) {
749 cs_error(link->handle, RequestConfiguration, i);
753 if (dtl1_open(info) != 0)
756 strcpy(info->node.dev_name, info->hdev->name);
757 link->dev = &info->node;
758 link->state &= ~DEV_CONFIG_PENDING;
763 cs_error(link->handle, last_fn, last_ret);
770 void dtl1_release(dev_link_t *link)
772 dtl1_info_t *info = link->priv;
774 if (link->state & DEV_PRESENT)
779 pcmcia_release_configuration(link->handle);
780 pcmcia_release_io(link->handle, &link->io);
781 pcmcia_release_irq(link->handle, &link->irq);
783 link->state &= ~DEV_CONFIG;
787 int dtl1_event(event_t event, int priority, event_callback_args_t *args)
789 dev_link_t *link = args->client_data;
790 dtl1_info_t *info = link->priv;
793 case CS_EVENT_CARD_REMOVAL:
794 link->state &= ~DEV_PRESENT;
795 if (link->state & DEV_CONFIG) {
800 case CS_EVENT_CARD_INSERTION:
801 link->state |= DEV_PRESENT | DEV_CONFIG_PENDING;
804 case CS_EVENT_PM_SUSPEND:
805 link->state |= DEV_SUSPEND;
806 /* Fall through... */
807 case CS_EVENT_RESET_PHYSICAL:
808 if (link->state & DEV_CONFIG)
809 pcmcia_release_configuration(link->handle);
811 case CS_EVENT_PM_RESUME:
812 link->state &= ~DEV_SUSPEND;
813 /* Fall through... */
814 case CS_EVENT_CARD_RESET:
816 pcmcia_request_configuration(link->handle, &link->conf);
823 static struct pcmcia_driver dtl1_driver = {
824 .owner = THIS_MODULE,
828 .attach = dtl1_attach,
829 .detach = dtl1_detach,
832 static int __init init_dtl1_cs(void)
834 return pcmcia_register_driver(&dtl1_driver);
838 static void __exit exit_dtl1_cs(void)
840 pcmcia_unregister_driver(&dtl1_driver);
842 /* XXX: this really needs to move into generic code.. */
843 while (dev_list != NULL)
844 dtl1_detach(dev_list);
847 module_init(init_dtl1_cs);
848 module_exit(exit_dtl1_cs);