--- /dev/null
+/*
+ *
+ * A driver for Nokia Connectivity Card DTL-1 devices
+ *
+ * Copyright (C) 2001-2002 Marcel Holtmann <marcel@holtmann.org>
+ *
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation;
+ *
+ * Software distributed under the License is distributed on an "AS
+ * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
+ * implied. See the License for the specific language governing
+ * rights and limitations under the License.
+ *
+ * The initial developer of the original code is David A. Hinds
+ * <dahinds@users.sourceforge.net>. Portions created by David A. Hinds
+ * are Copyright (C) 1999 David A. Hinds. All Rights Reserved.
+ *
+ */
+
+#include <linux/module.h>
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/ptrace.h>
+#include <linux/ioport.h>
+#include <linux/spinlock.h>
+#include <linux/moduleparam.h>
+
+#include <linux/skbuff.h>
+#include <linux/string.h>
+#include <linux/serial.h>
+#include <linux/serial_reg.h>
+#include <linux/bitops.h>
+#include <asm/io.h>
+
+#include <pcmcia/cistpl.h>
+#include <pcmcia/ciscode.h>
+#include <pcmcia/ds.h>
+#include <pcmcia/cisreg.h>
+
+#include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/hci_core.h>
+
+
+
+/* ======================== Module parameters ======================== */
+
+
+MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
+MODULE_DESCRIPTION("Bluetooth driver for Nokia Connectivity Card DTL-1");
+MODULE_LICENSE("GPL");
+
+
+
+/* ======================== Local structures ======================== */
+
+
+struct dtl1_info {
+ struct pcmcia_device *p_dev;
+
+ struct hci_dev *hdev;
+
+ spinlock_t lock; /* For serializing operations */
+
+ unsigned long flowmask; /* HCI flow mask */
+ int ri_latch;
+
+ struct sk_buff_head txq;
+ unsigned long tx_state;
+
+ unsigned long rx_state;
+ unsigned long rx_count;
+ struct sk_buff *rx_skb;
+};
+
+
+static int dtl1_config(struct pcmcia_device *link);
+
+
+/* Transmit states */
+#define XMIT_SENDING 1
+#define XMIT_WAKEUP 2
+#define XMIT_WAITING 8
+
+/* Receiver States */
+#define RECV_WAIT_NSH 0
+#define RECV_WAIT_DATA 1
+
+
+struct nsh {
+ u8 type;
+ u8 zero;
+ u16 len;
+} __packed; /* Nokia Specific Header */
+
+#define NSHL 4 /* Nokia Specific Header Length */
+
+
+
+/* ======================== Interrupt handling ======================== */
+
+
+static int dtl1_write(unsigned int iobase, int fifo_size, __u8 *buf, int len)
+{
+ int actual = 0;
+
+ /* Tx FIFO should be empty */
+ if (!(inb(iobase + UART_LSR) & UART_LSR_THRE))
+ return 0;
+
+ /* Fill FIFO with current frame */
+ while ((fifo_size-- > 0) && (actual < len)) {
+ /* Transmit next byte */
+ outb(buf[actual], iobase + UART_TX);
+ actual++;
+ }
+
+ return actual;
+}
+
+
+static void dtl1_write_wakeup(struct dtl1_info *info)
+{
+ if (!info) {
+ BT_ERR("Unknown device");
+ return;
+ }
+
+ if (test_bit(XMIT_WAITING, &(info->tx_state))) {
+ set_bit(XMIT_WAKEUP, &(info->tx_state));
+ return;
+ }
+
+ if (test_and_set_bit(XMIT_SENDING, &(info->tx_state))) {
+ set_bit(XMIT_WAKEUP, &(info->tx_state));
+ return;
+ }
+
+ do {
+ unsigned int iobase = info->p_dev->resource[0]->start;
+ register struct sk_buff *skb;
+ int len;
+
+ clear_bit(XMIT_WAKEUP, &(info->tx_state));
+
+ if (!pcmcia_dev_present(info->p_dev))
+ return;
+
+ skb = skb_dequeue(&(info->txq));
+ if (!skb)
+ break;
+
+ /* Send frame */
+ len = dtl1_write(iobase, 32, skb->data, skb->len);
+
+ if (len == skb->len) {
+ set_bit(XMIT_WAITING, &(info->tx_state));
+ kfree_skb(skb);
+ } else {
+ skb_pull(skb, len);
+ skb_queue_head(&(info->txq), skb);
+ }
+
+ info->hdev->stat.byte_tx += len;
+
+ } while (test_bit(XMIT_WAKEUP, &(info->tx_state)));
+
+ clear_bit(XMIT_SENDING, &(info->tx_state));
+}
+
+
+static void dtl1_control(struct dtl1_info *info, struct sk_buff *skb)
+{
+ u8 flowmask = *(u8 *)skb->data;
+ int i;
+
+ printk(KERN_INFO "Bluetooth: Nokia control data =");
+ for (i = 0; i < skb->len; i++) {
+ printk(" %02x", skb->data[i]);
+ }
+ printk("\n");
+
+ /* transition to active state */
+ if (((info->flowmask & 0x07) == 0) && ((flowmask & 0x07) != 0)) {
+ clear_bit(XMIT_WAITING, &(info->tx_state));
+ dtl1_write_wakeup(info);
+ }
+
+ info->flowmask = flowmask;
+
+ kfree_skb(skb);
+}
+
+
+static void dtl1_receive(struct dtl1_info *info)
+{
+ unsigned int iobase;
+ struct nsh *nsh;
+ int boguscount = 0;
+
+ if (!info) {
+ BT_ERR("Unknown device");
+ return;
+ }
+
+ iobase = info->p_dev->resource[0]->start;
+
+ do {
+ info->hdev->stat.byte_rx++;
+
+ /* Allocate packet */
+ if (info->rx_skb == NULL) {
+ info->rx_skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC);
+ if (!info->rx_skb) {
+ BT_ERR("Can't allocate mem for new packet");
+ info->rx_state = RECV_WAIT_NSH;
+ info->rx_count = NSHL;
+ return;
+ }
+ }
+
+ *skb_put(info->rx_skb, 1) = inb(iobase + UART_RX);
+ nsh = (struct nsh *)info->rx_skb->data;
+
+ info->rx_count--;
+
+ if (info->rx_count == 0) {
+
+ switch (info->rx_state) {
+ case RECV_WAIT_NSH:
+ info->rx_state = RECV_WAIT_DATA;
+ info->rx_count = nsh->len + (nsh->len & 0x0001);
+ break;
+ case RECV_WAIT_DATA:
+ bt_cb(info->rx_skb)->pkt_type = nsh->type;
+
+ /* remove PAD byte if it exists */
+ if (nsh->len & 0x0001) {
+ info->rx_skb->tail--;
+ info->rx_skb->len--;
+ }
+
+ /* remove NSH */
+ skb_pull(info->rx_skb, NSHL);
+
+ switch (bt_cb(info->rx_skb)->pkt_type) {
+ case 0x80:
+ /* control data for the Nokia Card */
+ dtl1_control(info, info->rx_skb);
+ break;
+ case 0x82:
+ case 0x83:
+ case 0x84:
+ /* send frame to the HCI layer */
+ bt_cb(info->rx_skb)->pkt_type &= 0x0f;
+ hci_recv_frame(info->hdev, info->rx_skb);
+ break;
+ default:
+ /* unknown packet */
+ BT_ERR("Unknown HCI packet with type 0x%02x received", bt_cb(info->rx_skb)->pkt_type);
+ kfree_skb(info->rx_skb);
+ break;
+ }
+
+ info->rx_state = RECV_WAIT_NSH;
+ info->rx_count = NSHL;
+ info->rx_skb = NULL;
+ break;
+ }
+
+ }
+
+ /* Make sure we don't stay here too long */
+ if (boguscount++ > 32)
+ break;
+
+ } while (inb(iobase + UART_LSR) & UART_LSR_DR);
+}
+
+
+static irqreturn_t dtl1_interrupt(int irq, void *dev_inst)
+{
+ struct dtl1_info *info = dev_inst;
+ unsigned int iobase;
+ unsigned char msr;
+ int boguscount = 0;
+ int iir, lsr;
+ irqreturn_t r = IRQ_NONE;
+
+ if (!info || !info->hdev)
+ /* our irq handler is shared */
+ return IRQ_NONE;
+
+ iobase = info->p_dev->resource[0]->start;
+
+ spin_lock(&(info->lock));
+
+ iir = inb(iobase + UART_IIR) & UART_IIR_ID;
+ while (iir) {
+
+ r = IRQ_HANDLED;
+ /* Clear interrupt */
+ lsr = inb(iobase + UART_LSR);
+
+ switch (iir) {
+ case UART_IIR_RLSI:
+ BT_ERR("RLSI");
+ break;
+ case UART_IIR_RDI:
+ /* Receive interrupt */
+ dtl1_receive(info);
+ break;
+ case UART_IIR_THRI:
+ if (lsr & UART_LSR_THRE) {
+ /* Transmitter ready for data */
+ dtl1_write_wakeup(info);
+ }
+ break;
+ default:
+ BT_ERR("Unhandled IIR=%#x", iir);
+ break;
+ }
+
+ /* Make sure we don't stay here too long */
+ if (boguscount++ > 100)
+ break;
+
+ iir = inb(iobase + UART_IIR) & UART_IIR_ID;
+
+ }
+
+ msr = inb(iobase + UART_MSR);
+
+ if (info->ri_latch ^ (msr & UART_MSR_RI)) {
+ info->ri_latch = msr & UART_MSR_RI;
+ clear_bit(XMIT_WAITING, &(info->tx_state));
+ dtl1_write_wakeup(info);
+ r = IRQ_HANDLED;
+ }
+
+ spin_unlock(&(info->lock));
+
+ return r;
+}
+
+
+
+/* ======================== HCI interface ======================== */
+
+
+static int dtl1_hci_open(struct hci_dev *hdev)
+{
+ set_bit(HCI_RUNNING, &(hdev->flags));
+
+ return 0;
+}
+
+
+static int dtl1_hci_flush(struct hci_dev *hdev)
+{
+ struct dtl1_info *info = hci_get_drvdata(hdev);
+
+ /* Drop TX queue */
+ skb_queue_purge(&(info->txq));
+
+ return 0;
+}
+
+
+static int dtl1_hci_close(struct hci_dev *hdev)
+{
+ if (!test_and_clear_bit(HCI_RUNNING, &(hdev->flags)))
+ return 0;
+
+ dtl1_hci_flush(hdev);
+
+ return 0;
+}
+
+
+static int dtl1_hci_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
+{
+ struct dtl1_info *info = hci_get_drvdata(hdev);
+ struct sk_buff *s;
+ struct nsh nsh;
+
+ switch (bt_cb(skb)->pkt_type) {
+ case HCI_COMMAND_PKT:
+ hdev->stat.cmd_tx++;
+ nsh.type = 0x81;
+ break;
+ case HCI_ACLDATA_PKT:
+ hdev->stat.acl_tx++;
+ nsh.type = 0x82;
+ break;
+ case HCI_SCODATA_PKT:
+ hdev->stat.sco_tx++;
+ nsh.type = 0x83;
+ break;
+ default:
+ return -EILSEQ;
+ };
+
+ nsh.zero = 0;
+ nsh.len = skb->len;
+
+ s = bt_skb_alloc(NSHL + skb->len + 1, GFP_ATOMIC);
+ if (!s)
+ return -ENOMEM;
+
+ skb_reserve(s, NSHL);
+ skb_copy_from_linear_data(skb, skb_put(s, skb->len), skb->len);
+ if (skb->len & 0x0001)
+ *skb_put(s, 1) = 0; /* PAD */
+
+ /* Prepend skb with Nokia frame header and queue */
+ memcpy(skb_push(s, NSHL), &nsh, NSHL);
+ skb_queue_tail(&(info->txq), s);
+
+ dtl1_write_wakeup(info);
+
+ kfree_skb(skb);
+
+ return 0;
+}
+
+
+
+/* ======================== Card services HCI interaction ======================== */
+
+
+static int dtl1_open(struct dtl1_info *info)
+{
+ unsigned long flags;
+ unsigned int iobase = info->p_dev->resource[0]->start;
+ struct hci_dev *hdev;
+
+ spin_lock_init(&(info->lock));
+
+ skb_queue_head_init(&(info->txq));
+
+ info->rx_state = RECV_WAIT_NSH;
+ info->rx_count = NSHL;
+ info->rx_skb = NULL;
+
+ set_bit(XMIT_WAITING, &(info->tx_state));
+
+ /* Initialize HCI device */
+ hdev = hci_alloc_dev();
+ if (!hdev) {
+ BT_ERR("Can't allocate HCI device");
+ return -ENOMEM;
+ }
+
+ info->hdev = hdev;
+
+ hdev->bus = HCI_PCCARD;
+ hci_set_drvdata(hdev, info);
+ SET_HCIDEV_DEV(hdev, &info->p_dev->dev);
+
+ hdev->open = dtl1_hci_open;
+ hdev->close = dtl1_hci_close;
+ hdev->flush = dtl1_hci_flush;
+ hdev->send = dtl1_hci_send_frame;
+
+ spin_lock_irqsave(&(info->lock), flags);
+
+ /* Reset UART */
+ outb(0, iobase + UART_MCR);
+
+ /* Turn off interrupts */
+ outb(0, iobase + UART_IER);
+
+ /* Initialize UART */
+ outb(UART_LCR_WLEN8, iobase + UART_LCR); /* Reset DLAB */
+ outb((UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2), iobase + UART_MCR);
+
+ info->ri_latch = inb(info->p_dev->resource[0]->start + UART_MSR)
+ & UART_MSR_RI;
+
+ /* Turn on interrupts */
+ outb(UART_IER_RLSI | UART_IER_RDI | UART_IER_THRI, iobase + UART_IER);
+
+ spin_unlock_irqrestore(&(info->lock), flags);
+
+ /* Timeout before it is safe to send the first HCI packet */
+ msleep(2000);
+
+ /* Register HCI device */
+ if (hci_register_dev(hdev) < 0) {
+ BT_ERR("Can't register HCI device");
+ info->hdev = NULL;
+ hci_free_dev(hdev);
+ return -ENODEV;
+ }
+
+ return 0;
+}
+
+
+static int dtl1_close(struct dtl1_info *info)
+{
+ unsigned long flags;
+ unsigned int iobase = info->p_dev->resource[0]->start;
+ struct hci_dev *hdev = info->hdev;
+
+ if (!hdev)
+ return -ENODEV;
+
+ dtl1_hci_close(hdev);
+
+ spin_lock_irqsave(&(info->lock), flags);
+
+ /* Reset UART */
+ outb(0, iobase + UART_MCR);
+
+ /* Turn off interrupts */
+ outb(0, iobase + UART_IER);
+
+ spin_unlock_irqrestore(&(info->lock), flags);
+
+ hci_unregister_dev(hdev);
+ hci_free_dev(hdev);
+
+ return 0;
+}
+
+static int dtl1_probe(struct pcmcia_device *link)
+{
+ struct dtl1_info *info;
+
+ /* Create new info device */
+ info = devm_kzalloc(&link->dev, sizeof(*info), GFP_KERNEL);
+ if (!info)
+ return -ENOMEM;
+
+ info->p_dev = link;
+ link->priv = info;
+
+ link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_IO;
+
+ return dtl1_config(link);
+}
+
+
+static void dtl1_detach(struct pcmcia_device *link)
+{
+ struct dtl1_info *info = link->priv;
+
+ dtl1_close(info);
+ pcmcia_disable_device(link);
+}
+
+static int dtl1_confcheck(struct pcmcia_device *p_dev, void *priv_data)
+{
+ if ((p_dev->resource[1]->end) || (p_dev->resource[1]->end < 8))
+ return -ENODEV;
+
+ p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH;
+ p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_8;
+
+ return pcmcia_request_io(p_dev);
+}
+
+static int dtl1_config(struct pcmcia_device *link)
+{
+ struct dtl1_info *info = link->priv;
+ int ret;
+
+ /* Look for a generic full-sized window */
+ link->resource[0]->end = 8;
+ ret = pcmcia_loop_config(link, dtl1_confcheck, NULL);
+ if (ret)
+ goto failed;
+
+ ret = pcmcia_request_irq(link, dtl1_interrupt);
+ if (ret)
+ goto failed;
+
+ ret = pcmcia_enable_device(link);
+ if (ret)
+ goto failed;
+
+ ret = dtl1_open(info);
+ if (ret)
+ goto failed;
+
+ return 0;
+
+failed:
+ dtl1_detach(link);
+ return ret;
+}
+
+static const struct pcmcia_device_id dtl1_ids[] = {
+ PCMCIA_DEVICE_PROD_ID12("Nokia Mobile Phones", "DTL-1", 0xe1bfdd64, 0xe168480d),
+ PCMCIA_DEVICE_PROD_ID12("Nokia Mobile Phones", "DTL-4", 0xe1bfdd64, 0x9102bc82),
+ PCMCIA_DEVICE_PROD_ID12("Socket", "CF", 0xb38bcc2e, 0x44ebf863),
+ PCMCIA_DEVICE_PROD_ID12("Socket", "CF+ Personal Network Card", 0xb38bcc2e, 0xe732bae3),
+ PCMCIA_DEVICE_NULL
+};
+MODULE_DEVICE_TABLE(pcmcia, dtl1_ids);
+
+static struct pcmcia_driver dtl1_driver = {
+ .owner = THIS_MODULE,
+ .name = "dtl1_cs",
+ .probe = dtl1_probe,
+ .remove = dtl1_detach,
+ .id_table = dtl1_ids,
+};
+module_pcmcia_driver(dtl1_driver);
Code Review / kvmfornfv.git / blobdiff