| /* |
| * |
| * Driver for the 3Com Bluetooth PCMCIA card |
| * |
| * Copyright (C) 2001-2002 Marcel Holtmann <marcel@holtmann.org> |
| * Jose Orlando Pereira <jop@di.uminho.pt> |
| * |
| * |
| * 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 <linux/device.h> |
| #include <linux/firmware.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 the 3Com Bluetooth PCMCIA card"); |
| MODULE_LICENSE("GPL"); |
| MODULE_FIRMWARE("BT3CPCC.bin"); |
| |
| |
| |
| /* ======================== Local structures ======================== */ |
| |
| |
| struct bt3c_info { |
| struct pcmcia_device *p_dev; |
| |
| struct hci_dev *hdev; |
| |
| spinlock_t lock; /* For serializing operations */ |
| |
| struct sk_buff_head txq; |
| unsigned long tx_state; |
| |
| unsigned long rx_state; |
| unsigned long rx_count; |
| struct sk_buff *rx_skb; |
| }; |
| |
| |
| static int bt3c_config(struct pcmcia_device *link); |
| static void bt3c_release(struct pcmcia_device *link); |
| |
| static void bt3c_detach(struct pcmcia_device *p_dev); |
| |
| |
| /* Transmit states */ |
| #define XMIT_SENDING 1 |
| #define XMIT_WAKEUP 2 |
| #define XMIT_WAITING 8 |
| |
| /* Receiver states */ |
| #define RECV_WAIT_PACKET_TYPE 0 |
| #define RECV_WAIT_EVENT_HEADER 1 |
| #define RECV_WAIT_ACL_HEADER 2 |
| #define RECV_WAIT_SCO_HEADER 3 |
| #define RECV_WAIT_DATA 4 |
| |
| |
| |
| /* ======================== Special I/O functions ======================== */ |
| |
| |
| #define DATA_L 0 |
| #define DATA_H 1 |
| #define ADDR_L 2 |
| #define ADDR_H 3 |
| #define CONTROL 4 |
| |
| |
| static inline void bt3c_address(unsigned int iobase, unsigned short addr) |
| { |
| outb(addr & 0xff, iobase + ADDR_L); |
| outb((addr >> 8) & 0xff, iobase + ADDR_H); |
| } |
| |
| |
| static inline void bt3c_put(unsigned int iobase, unsigned short value) |
| { |
| outb(value & 0xff, iobase + DATA_L); |
| outb((value >> 8) & 0xff, iobase + DATA_H); |
| } |
| |
| |
| static inline void bt3c_io_write(unsigned int iobase, unsigned short addr, unsigned short value) |
| { |
| bt3c_address(iobase, addr); |
| bt3c_put(iobase, value); |
| } |
| |
| |
| static inline unsigned short bt3c_get(unsigned int iobase) |
| { |
| unsigned short value = inb(iobase + DATA_L); |
| |
| value |= inb(iobase + DATA_H) << 8; |
| |
| return value; |
| } |
| |
| |
| static inline unsigned short bt3c_read(unsigned int iobase, unsigned short addr) |
| { |
| bt3c_address(iobase, addr); |
| |
| return bt3c_get(iobase); |
| } |
| |
| |
| |
| /* ======================== Interrupt handling ======================== */ |
| |
| |
| static int bt3c_write(unsigned int iobase, int fifo_size, __u8 *buf, int len) |
| { |
| int actual = 0; |
| |
| bt3c_address(iobase, 0x7080); |
| |
| /* Fill FIFO with current frame */ |
| while (actual < len) { |
| /* Transmit next byte */ |
| bt3c_put(iobase, buf[actual]); |
| actual++; |
| } |
| |
| bt3c_io_write(iobase, 0x7005, actual); |
| |
| return actual; |
| } |
| |
| |
| static void bt3c_write_wakeup(struct bt3c_info *info) |
| { |
| if (!info) { |
| BT_ERR("Unknown device"); |
| return; |
| } |
| |
| if (test_and_set_bit(XMIT_SENDING, &(info->tx_state))) |
| return; |
| |
| do { |
| unsigned int iobase = info->p_dev->resource[0]->start; |
| register struct sk_buff *skb; |
| int len; |
| |
| if (!pcmcia_dev_present(info->p_dev)) |
| break; |
| |
| skb = skb_dequeue(&(info->txq)); |
| if (!skb) { |
| clear_bit(XMIT_SENDING, &(info->tx_state)); |
| break; |
| } |
| |
| /* Send frame */ |
| len = bt3c_write(iobase, 256, skb->data, skb->len); |
| |
| if (len != skb->len) |
| BT_ERR("Very strange"); |
| |
| kfree_skb(skb); |
| |
| info->hdev->stat.byte_tx += len; |
| |
| } while (0); |
| } |
| |
| |
| static void bt3c_receive(struct bt3c_info *info) |
| { |
| unsigned int iobase; |
| int size = 0, avail; |
| |
| if (!info) { |
| BT_ERR("Unknown device"); |
| return; |
| } |
| |
| iobase = info->p_dev->resource[0]->start; |
| |
| avail = bt3c_read(iobase, 0x7006); |
| |
| bt3c_address(iobase, 0x7480); |
| while (size < avail) { |
| size++; |
| info->hdev->stat.byte_rx++; |
| |
| /* Allocate packet */ |
| if (!info->rx_skb) { |
| info->rx_state = RECV_WAIT_PACKET_TYPE; |
| info->rx_count = 0; |
| 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"); |
| return; |
| } |
| } |
| |
| |
| if (info->rx_state == RECV_WAIT_PACKET_TYPE) { |
| |
| hci_skb_pkt_type(info->rx_skb) = inb(iobase + DATA_L); |
| inb(iobase + DATA_H); |
| |
| switch (hci_skb_pkt_type(info->rx_skb)) { |
| |
| case HCI_EVENT_PKT: |
| info->rx_state = RECV_WAIT_EVENT_HEADER; |
| info->rx_count = HCI_EVENT_HDR_SIZE; |
| break; |
| |
| case HCI_ACLDATA_PKT: |
| info->rx_state = RECV_WAIT_ACL_HEADER; |
| info->rx_count = HCI_ACL_HDR_SIZE; |
| break; |
| |
| case HCI_SCODATA_PKT: |
| info->rx_state = RECV_WAIT_SCO_HEADER; |
| info->rx_count = HCI_SCO_HDR_SIZE; |
| break; |
| |
| default: |
| /* Unknown packet */ |
| BT_ERR("Unknown HCI packet with type 0x%02x received", |
| hci_skb_pkt_type(info->rx_skb)); |
| info->hdev->stat.err_rx++; |
| |
| kfree_skb(info->rx_skb); |
| info->rx_skb = NULL; |
| break; |
| |
| } |
| |
| } else { |
| |
| __u8 x = inb(iobase + DATA_L); |
| |
| skb_put_u8(info->rx_skb, x); |
| inb(iobase + DATA_H); |
| info->rx_count--; |
| |
| if (info->rx_count == 0) { |
| |
| int dlen; |
| struct hci_event_hdr *eh; |
| struct hci_acl_hdr *ah; |
| struct hci_sco_hdr *sh; |
| |
| switch (info->rx_state) { |
| |
| case RECV_WAIT_EVENT_HEADER: |
| eh = hci_event_hdr(info->rx_skb); |
| info->rx_state = RECV_WAIT_DATA; |
| info->rx_count = eh->plen; |
| break; |
| |
| case RECV_WAIT_ACL_HEADER: |
| ah = hci_acl_hdr(info->rx_skb); |
| dlen = __le16_to_cpu(ah->dlen); |
| info->rx_state = RECV_WAIT_DATA; |
| info->rx_count = dlen; |
| break; |
| |
| case RECV_WAIT_SCO_HEADER: |
| sh = hci_sco_hdr(info->rx_skb); |
| info->rx_state = RECV_WAIT_DATA; |
| info->rx_count = sh->dlen; |
| break; |
| |
| case RECV_WAIT_DATA: |
| hci_recv_frame(info->hdev, info->rx_skb); |
| info->rx_skb = NULL; |
| break; |
| |
| } |
| |
| } |
| |
| } |
| |
| } |
| |
| bt3c_io_write(iobase, 0x7006, 0x0000); |
| } |
| |
| |
| static irqreturn_t bt3c_interrupt(int irq, void *dev_inst) |
| { |
| struct bt3c_info *info = dev_inst; |
| unsigned int iobase; |
| int iir; |
| 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 + CONTROL); |
| if (iir & 0x80) { |
| int stat = bt3c_read(iobase, 0x7001); |
| |
| if ((stat & 0xff) == 0x7f) { |
| BT_ERR("Very strange (stat=0x%04x)", stat); |
| } else if ((stat & 0xff) != 0xff) { |
| if (stat & 0x0020) { |
| int status = bt3c_read(iobase, 0x7002) & 0x10; |
| bt_dev_info(info->hdev, "Antenna %s", |
| status ? "out" : "in"); |
| } |
| if (stat & 0x0001) |
| bt3c_receive(info); |
| if (stat & 0x0002) { |
| clear_bit(XMIT_SENDING, &(info->tx_state)); |
| bt3c_write_wakeup(info); |
| } |
| |
| bt3c_io_write(iobase, 0x7001, 0x0000); |
| |
| outb(iir, iobase + CONTROL); |
| } |
| r = IRQ_HANDLED; |
| } |
| |
| spin_unlock(&(info->lock)); |
| |
| return r; |
| } |
| |
| |
| |
| /* ======================== HCI interface ======================== */ |
| |
| |
| static int bt3c_hci_flush(struct hci_dev *hdev) |
| { |
| struct bt3c_info *info = hci_get_drvdata(hdev); |
| |
| /* Drop TX queue */ |
| skb_queue_purge(&(info->txq)); |
| |
| return 0; |
| } |
| |
| |
| static int bt3c_hci_open(struct hci_dev *hdev) |
| { |
| return 0; |
| } |
| |
| |
| static int bt3c_hci_close(struct hci_dev *hdev) |
| { |
| bt3c_hci_flush(hdev); |
| |
| return 0; |
| } |
| |
| |
| static int bt3c_hci_send_frame(struct hci_dev *hdev, struct sk_buff *skb) |
| { |
| struct bt3c_info *info = hci_get_drvdata(hdev); |
| unsigned long flags; |
| |
| switch (hci_skb_pkt_type(skb)) { |
| case HCI_COMMAND_PKT: |
| hdev->stat.cmd_tx++; |
| break; |
| case HCI_ACLDATA_PKT: |
| hdev->stat.acl_tx++; |
| break; |
| case HCI_SCODATA_PKT: |
| hdev->stat.sco_tx++; |
| break; |
| } |
| |
| /* Prepend skb with frame type */ |
| memcpy(skb_push(skb, 1), &hci_skb_pkt_type(skb), 1); |
| skb_queue_tail(&(info->txq), skb); |
| |
| spin_lock_irqsave(&(info->lock), flags); |
| |
| bt3c_write_wakeup(info); |
| |
| spin_unlock_irqrestore(&(info->lock), flags); |
| |
| return 0; |
| } |
| |
| |
| |
| /* ======================== Card services HCI interaction ======================== */ |
| |
| |
| static int bt3c_load_firmware(struct bt3c_info *info, |
| const unsigned char *firmware, |
| int count) |
| { |
| char *ptr = (char *) firmware; |
| char b[9]; |
| unsigned int iobase, tmp, tn; |
| unsigned long size, addr, fcs; |
| int i, err = 0; |
| |
| iobase = info->p_dev->resource[0]->start; |
| |
| /* Reset */ |
| bt3c_io_write(iobase, 0x8040, 0x0404); |
| bt3c_io_write(iobase, 0x8040, 0x0400); |
| |
| udelay(1); |
| |
| bt3c_io_write(iobase, 0x8040, 0x0404); |
| |
| udelay(17); |
| |
| /* Load */ |
| while (count) { |
| if (ptr[0] != 'S') { |
| BT_ERR("Bad address in firmware"); |
| err = -EFAULT; |
| goto error; |
| } |
| |
| memset(b, 0, sizeof(b)); |
| memcpy(b, ptr + 2, 2); |
| if (kstrtoul(b, 16, &size) < 0) |
| return -EINVAL; |
| |
| memset(b, 0, sizeof(b)); |
| memcpy(b, ptr + 4, 8); |
| if (kstrtoul(b, 16, &addr) < 0) |
| return -EINVAL; |
| |
| memset(b, 0, sizeof(b)); |
| memcpy(b, ptr + (size * 2) + 2, 2); |
| if (kstrtoul(b, 16, &fcs) < 0) |
| return -EINVAL; |
| |
| memset(b, 0, sizeof(b)); |
| for (tmp = 0, i = 0; i < size; i++) { |
| memcpy(b, ptr + (i * 2) + 2, 2); |
| if (kstrtouint(b, 16, &tn)) |
| return -EINVAL; |
| tmp += tn; |
| } |
| |
| if (((tmp + fcs) & 0xff) != 0xff) { |
| BT_ERR("Checksum error in firmware"); |
| err = -EILSEQ; |
| goto error; |
| } |
| |
| if (ptr[1] == '3') { |
| bt3c_address(iobase, addr); |
| |
| memset(b, 0, sizeof(b)); |
| for (i = 0; i < (size - 4) / 2; i++) { |
| memcpy(b, ptr + (i * 4) + 12, 4); |
| if (kstrtouint(b, 16, &tmp)) |
| return -EINVAL; |
| bt3c_put(iobase, tmp); |
| } |
| } |
| |
| ptr += (size * 2) + 6; |
| count -= (size * 2) + 6; |
| } |
| |
| udelay(17); |
| |
| /* Boot */ |
| bt3c_address(iobase, 0x3000); |
| outb(inb(iobase + CONTROL) | 0x40, iobase + CONTROL); |
| |
| error: |
| udelay(17); |
| |
| /* Clear */ |
| bt3c_io_write(iobase, 0x7006, 0x0000); |
| bt3c_io_write(iobase, 0x7005, 0x0000); |
| bt3c_io_write(iobase, 0x7001, 0x0000); |
| |
| return err; |
| } |
| |
| |
| static int bt3c_open(struct bt3c_info *info) |
| { |
| const struct firmware *firmware; |
| struct hci_dev *hdev; |
| int err; |
| |
| spin_lock_init(&(info->lock)); |
| |
| skb_queue_head_init(&(info->txq)); |
| |
| info->rx_state = RECV_WAIT_PACKET_TYPE; |
| info->rx_count = 0; |
| info->rx_skb = NULL; |
| |
| /* 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 = bt3c_hci_open; |
| hdev->close = bt3c_hci_close; |
| hdev->flush = bt3c_hci_flush; |
| hdev->send = bt3c_hci_send_frame; |
| |
| /* Load firmware */ |
| err = request_firmware(&firmware, "BT3CPCC.bin", &info->p_dev->dev); |
| if (err < 0) { |
| BT_ERR("Firmware request failed"); |
| goto error; |
| } |
| |
| err = bt3c_load_firmware(info, firmware->data, firmware->size); |
| |
| release_firmware(firmware); |
| |
| if (err < 0) { |
| BT_ERR("Firmware loading failed"); |
| goto error; |
| } |
| |
| /* Timeout before it is safe to send the first HCI packet */ |
| msleep(1000); |
| |
| /* Register HCI device */ |
| err = hci_register_dev(hdev); |
| if (err < 0) { |
| BT_ERR("Can't register HCI device"); |
| goto error; |
| } |
| |
| return 0; |
| |
| error: |
| info->hdev = NULL; |
| hci_free_dev(hdev); |
| return err; |
| } |
| |
| |
| static int bt3c_close(struct bt3c_info *info) |
| { |
| struct hci_dev *hdev = info->hdev; |
| |
| if (!hdev) |
| return -ENODEV; |
| |
| bt3c_hci_close(hdev); |
| |
| hci_unregister_dev(hdev); |
| hci_free_dev(hdev); |
| |
| return 0; |
| } |
| |
| static int bt3c_probe(struct pcmcia_device *link) |
| { |
| struct bt3c_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_VPP | |
| CONF_AUTO_SET_IO; |
| |
| return bt3c_config(link); |
| } |
| |
| |
| static void bt3c_detach(struct pcmcia_device *link) |
| { |
| bt3c_release(link); |
| } |
| |
| static int bt3c_check_config(struct pcmcia_device *p_dev, void *priv_data) |
| { |
| int *try = priv_data; |
| |
| if (!try) |
| p_dev->io_lines = 16; |
| |
| if ((p_dev->resource[0]->end != 8) || (p_dev->resource[0]->start == 0)) |
| return -EINVAL; |
| |
| p_dev->resource[0]->end = 8; |
| 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 bt3c_check_config_notpicky(struct pcmcia_device *p_dev, |
| void *priv_data) |
| { |
| static unsigned int base[5] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8, 0x0 }; |
| int j; |
| |
| if (p_dev->io_lines > 3) |
| return -ENODEV; |
| |
| p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH; |
| p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_8; |
| p_dev->resource[0]->end = 8; |
| |
| for (j = 0; j < 5; j++) { |
| p_dev->resource[0]->start = base[j]; |
| p_dev->io_lines = base[j] ? 16 : 3; |
| if (!pcmcia_request_io(p_dev)) |
| return 0; |
| } |
| return -ENODEV; |
| } |
| |
| static int bt3c_config(struct pcmcia_device *link) |
| { |
| struct bt3c_info *info = link->priv; |
| int i; |
| unsigned long try; |
| |
| /* First pass: look for a config entry that looks normal. |
| * Two tries: without IO aliases, then with aliases |
| */ |
| for (try = 0; try < 2; try++) |
| if (!pcmcia_loop_config(link, bt3c_check_config, (void *) try)) |
| goto found_port; |
| |
| /* Second pass: try to find an entry that isn't picky about |
| * its base address, then try to grab any standard serial port |
| * address, and finally try to get any free port. |
| */ |
| if (!pcmcia_loop_config(link, bt3c_check_config_notpicky, NULL)) |
| goto found_port; |
| |
| BT_ERR("No usable port range found"); |
| goto failed; |
| |
| found_port: |
| i = pcmcia_request_irq(link, &bt3c_interrupt); |
| if (i != 0) |
| goto failed; |
| |
| i = pcmcia_enable_device(link); |
| if (i != 0) |
| goto failed; |
| |
| if (bt3c_open(info) != 0) |
| goto failed; |
| |
| return 0; |
| |
| failed: |
| bt3c_release(link); |
| return -ENODEV; |
| } |
| |
| |
| static void bt3c_release(struct pcmcia_device *link) |
| { |
| struct bt3c_info *info = link->priv; |
| |
| bt3c_close(info); |
| |
| pcmcia_disable_device(link); |
| } |
| |
| |
| static const struct pcmcia_device_id bt3c_ids[] = { |
| PCMCIA_DEVICE_PROD_ID13("3COM", "Bluetooth PC Card", 0xefce0a31, 0xd4ce9b02), |
| PCMCIA_DEVICE_NULL |
| }; |
| MODULE_DEVICE_TABLE(pcmcia, bt3c_ids); |
| |
| static struct pcmcia_driver bt3c_driver = { |
| .owner = THIS_MODULE, |
| .name = "bt3c_cs", |
| .probe = bt3c_probe, |
| .remove = bt3c_detach, |
| .id_table = bt3c_ids, |
| }; |
| module_pcmcia_driver(bt3c_driver); |