/* * * Bluetooth driver for the Anycom BlueCard (LSE039/LSE041) * * Copyright (C) 2001-2002 Marcel Holtmann * * * 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 * . Portions created by David A. Hinds * are Copyright (C) 1999 David A. Hinds. All Rights Reserved. * */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* ======================== Module parameters ======================== */ MODULE_AUTHOR("Marcel Holtmann "); MODULE_DESCRIPTION("Bluetooth driver for the Anycom BlueCard (LSE039/LSE041)"); MODULE_LICENSE("GPL"); /* ======================== Local structures ======================== */ typedef struct bluecard_info_t { struct pcmcia_device *p_dev; struct hci_dev *hdev; spinlock_t lock; /* For serializing operations */ struct timer_list timer; /* For LED control */ struct sk_buff_head txq; unsigned long tx_state; unsigned long rx_state; unsigned long rx_count; struct sk_buff *rx_skb; unsigned char ctrl_reg; unsigned long hw_state; /* Status of the hardware and LED control */ } bluecard_info_t; static int bluecard_config(struct pcmcia_device *link); static void bluecard_release(struct pcmcia_device *link); static void bluecard_detach(struct pcmcia_device *p_dev); /* Default baud rate: 57600, 115200, 230400 or 460800 */ #define DEFAULT_BAUD_RATE 230400 /* Hardware states */ #define CARD_READY 1 #define CARD_HAS_PCCARD_ID 4 #define CARD_HAS_POWER_LED 5 #define CARD_HAS_ACTIVITY_LED 6 /* Transmit states */ #define XMIT_SENDING 1 #define XMIT_WAKEUP 2 #define XMIT_BUFFER_NUMBER 5 /* unset = buffer one, set = buffer two */ #define XMIT_BUF_ONE_READY 6 #define XMIT_BUF_TWO_READY 7 #define XMIT_SENDING_READY 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 packet types */ #define PKT_BAUD_RATE_57600 0x80 #define PKT_BAUD_RATE_115200 0x81 #define PKT_BAUD_RATE_230400 0x82 #define PKT_BAUD_RATE_460800 0x83 /* These are the register offsets */ #define REG_COMMAND 0x20 #define REG_INTERRUPT 0x21 #define REG_CONTROL 0x22 #define REG_RX_CONTROL 0x24 #define REG_CARD_RESET 0x30 #define REG_LED_CTRL 0x30 /* REG_COMMAND */ #define REG_COMMAND_TX_BUF_ONE 0x01 #define REG_COMMAND_TX_BUF_TWO 0x02 #define REG_COMMAND_RX_BUF_ONE 0x04 #define REG_COMMAND_RX_BUF_TWO 0x08 #define REG_COMMAND_RX_WIN_ONE 0x00 #define REG_COMMAND_RX_WIN_TWO 0x10 /* REG_CONTROL */ #define REG_CONTROL_BAUD_RATE_57600 0x00 #define REG_CONTROL_BAUD_RATE_115200 0x01 #define REG_CONTROL_BAUD_RATE_230400 0x02 #define REG_CONTROL_BAUD_RATE_460800 0x03 #define REG_CONTROL_RTS 0x04 #define REG_CONTROL_BT_ON 0x08 #define REG_CONTROL_BT_RESET 0x10 #define REG_CONTROL_BT_RES_PU 0x20 #define REG_CONTROL_INTERRUPT 0x40 #define REG_CONTROL_CARD_RESET 0x80 /* REG_RX_CONTROL */ #define RTS_LEVEL_SHIFT_BITS 0x02 /* ======================== LED handling routines ======================== */ static void bluecard_activity_led_timeout(u_long arg) { bluecard_info_t *info = (bluecard_info_t *)arg; unsigned int iobase = info->p_dev->resource[0]->start; if (!test_bit(CARD_HAS_PCCARD_ID, &(info->hw_state))) return; if (test_bit(CARD_HAS_ACTIVITY_LED, &(info->hw_state))) { /* Disable activity LED */ outb(0x08 | 0x20, iobase + 0x30); } else { /* Disable power LED */ outb(0x00, iobase + 0x30); } } static void bluecard_enable_activity_led(bluecard_info_t *info) { unsigned int iobase = info->p_dev->resource[0]->start; if (!test_bit(CARD_HAS_PCCARD_ID, &(info->hw_state))) return; if (test_bit(CARD_HAS_ACTIVITY_LED, &(info->hw_state))) { /* Enable activity LED */ outb(0x10 | 0x40, iobase + 0x30); /* Stop the LED after HZ/4 */ mod_timer(&(info->timer), jiffies + HZ / 4); } else { /* Enable power LED */ outb(0x08 | 0x20, iobase + 0x30); /* Stop the LED after HZ/2 */ mod_timer(&(info->timer), jiffies + HZ / 2); } } /* ======================== Interrupt handling ======================== */ static int bluecard_write(unsigned int iobase, unsigned int offset, __u8 *buf, int len) { int i, actual; actual = (len > 15) ? 15 : len; outb_p(actual, iobase + offset); for (i = 0; i < actual; i++) outb_p(buf[i], iobase + offset + i + 1); return actual; } static void bluecard_write_wakeup(bluecard_info_t *info) { if (!info) { BT_ERR("Unknown device"); return; } if (!test_bit(XMIT_SENDING_READY, &(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; unsigned int offset; unsigned char command; unsigned long ready_bit; register struct sk_buff *skb; int len; clear_bit(XMIT_WAKEUP, &(info->tx_state)); if (!pcmcia_dev_present(info->p_dev)) return; if (test_bit(XMIT_BUFFER_NUMBER, &(info->tx_state))) { if (!test_bit(XMIT_BUF_TWO_READY, &(info->tx_state))) break; offset = 0x10; command = REG_COMMAND_TX_BUF_TWO; ready_bit = XMIT_BUF_TWO_READY; } else { if (!test_bit(XMIT_BUF_ONE_READY, &(info->tx_state))) break; offset = 0x00; command = REG_COMMAND_TX_BUF_ONE; ready_bit = XMIT_BUF_ONE_READY; } if (!(skb = skb_dequeue(&(info->txq)))) break; if (bt_cb(skb)->pkt_type & 0x80) { /* Disable RTS */ info->ctrl_reg |= REG_CONTROL_RTS; outb(info->ctrl_reg, iobase + REG_CONTROL); } /* Activate LED */ bluecard_enable_activity_led(info); /* Send frame */ len = bluecard_write(iobase, offset, skb->data, skb->len); /* Tell the FPGA to send the data */ outb_p(command, iobase + REG_COMMAND); /* Mark the buffer as dirty */ clear_bit(ready_bit, &(info->tx_state)); if (bt_cb(skb)->pkt_type & 0x80) { DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wq); DEFINE_WAIT(wait); unsigned char baud_reg; switch (bt_cb(skb)->pkt_type) { case PKT_BAUD_RATE_460800: baud_reg = REG_CONTROL_BAUD_RATE_460800; break; case PKT_BAUD_RATE_230400: baud_reg = REG_CONTROL_BAUD_RATE_230400; break; case PKT_BAUD_RATE_115200: baud_reg = REG_CONTROL_BAUD_RATE_115200; break; case PKT_BAUD_RATE_57600: /* Fall through... */ default: baud_reg = REG_CONTROL_BAUD_RATE_57600; break; } /* Wait until the command reaches the baseband */ prepare_to_wait(&wq, &wait, TASK_INTERRUPTIBLE); schedule_timeout(HZ/10); finish_wait(&wq, &wait); /* Set baud on baseband */ info->ctrl_reg &= ~0x03; info->ctrl_reg |= baud_reg; outb(info->ctrl_reg, iobase + REG_CONTROL); /* Enable RTS */ info->ctrl_reg &= ~REG_CONTROL_RTS; outb(info->ctrl_reg, iobase + REG_CONTROL); /* Wait before the next HCI packet can be send */ prepare_to_wait(&wq, &wait, TASK_INTERRUPTIBLE); schedule_timeout(HZ); finish_wait(&wq, &wait); } if (len == skb->len) { kfree_skb(skb); } else { skb_pull(skb, len); skb_queue_head(&(info->txq), skb); } info->hdev->stat.byte_tx += len; /* Change buffer */ change_bit(XMIT_BUFFER_NUMBER, &(info->tx_state)); } while (test_bit(XMIT_WAKEUP, &(info->tx_state))); clear_bit(XMIT_SENDING, &(info->tx_state)); } static int bluecard_read(unsigned int iobase, unsigned int offset, __u8 *buf, int size) { int i, n, len; outb(REG_COMMAND_RX_WIN_ONE, iobase + REG_COMMAND); len = inb(iobase + offset); n = 0; i = 1; while (n < len) { if (i == 16) { outb(REG_COMMAND_RX_WIN_TWO, iobase + REG_COMMAND); i = 0; } buf[n] = inb(iobase + offset + i); n++; i++; } return len; } static void bluecard_receive(bluecard_info_t *info, unsigned int offset) { unsigned int iobase; unsigned char buf[31]; int i, len; if (!info) { BT_ERR("Unknown device"); return; } iobase = info->p_dev->resource[0]->start; if (test_bit(XMIT_SENDING_READY, &(info->tx_state))) bluecard_enable_activity_led(info); len = bluecard_read(iobase, offset, buf, sizeof(buf)); for (i = 0; i < len; i++) { /* Allocate packet */ if (info->rx_skb == NULL) { info->rx_state = RECV_WAIT_PACKET_TYPE; info->rx_count = 0; if (!(info->rx_skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC))) { BT_ERR("Can't allocate mem for new packet"); return; } } if (info->rx_state == RECV_WAIT_PACKET_TYPE) { info->rx_skb->dev = (void *) info->hdev; bt_cb(info->rx_skb)->pkt_type = buf[i]; switch (bt_cb(info->rx_skb)->pkt_type) { case 0x00: /* init packet */ if (offset != 0x00) { set_bit(XMIT_BUF_ONE_READY, &(info->tx_state)); set_bit(XMIT_BUF_TWO_READY, &(info->tx_state)); set_bit(XMIT_SENDING_READY, &(info->tx_state)); bluecard_write_wakeup(info); } kfree_skb(info->rx_skb); info->rx_skb = NULL; break; 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", bt_cb(info->rx_skb)->pkt_type); info->hdev->stat.err_rx++; kfree_skb(info->rx_skb); info->rx_skb = NULL; break; } } else { *skb_put(info->rx_skb, 1) = buf[i]; 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->rx_skb); info->rx_skb = NULL; break; } } } } info->hdev->stat.byte_rx += len; } static irqreturn_t bluecard_interrupt(int irq, void *dev_inst) { bluecard_info_t *info = dev_inst; unsigned int iobase; unsigned char reg; if (!info || !info->hdev) /* our irq handler is shared */ return IRQ_NONE; if (!test_bit(CARD_READY, &(info->hw_state))) return IRQ_HANDLED; iobase = info->p_dev->resource[0]->start; spin_lock(&(info->lock)); /* Disable interrupt */ info->ctrl_reg &= ~REG_CONTROL_INTERRUPT; outb(info->ctrl_reg, iobase + REG_CONTROL); reg = inb(iobase + REG_INTERRUPT); if ((reg != 0x00) && (reg != 0xff)) { if (reg & 0x04) { bluecard_receive(info, 0x00); outb(0x04, iobase + REG_INTERRUPT); outb(REG_COMMAND_RX_BUF_ONE, iobase + REG_COMMAND); } if (reg & 0x08) { bluecard_receive(info, 0x10); outb(0x08, iobase + REG_INTERRUPT); outb(REG_COMMAND_RX_BUF_TWO, iobase + REG_COMMAND); } if (reg & 0x01) { set_bit(XMIT_BUF_ONE_READY, &(info->tx_state)); outb(0x01, iobase + REG_INTERRUPT); bluecard_write_wakeup(info); } if (reg & 0x02) { set_bit(XMIT_BUF_TWO_READY, &(info->tx_state)); outb(0x02, iobase + REG_INTERRUPT); bluecard_write_wakeup(info); } } /* Enable interrupt */ info->ctrl_reg |= REG_CONTROL_INTERRUPT; outb(info->ctrl_reg, iobase + REG_CONTROL); spin_unlock(&(info->lock)); return IRQ_HANDLED; } /* ======================== Device specific HCI commands ======================== */ static int bluecard_hci_set_baud_rate(struct hci_dev *hdev, int baud) { bluecard_info_t *info = hci_get_drvdata(hdev); struct sk_buff *skb; /* Ericsson baud rate command */ unsigned char cmd[] = { HCI_COMMAND_PKT, 0x09, 0xfc, 0x01, 0x03 }; if (!(skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC))) { BT_ERR("Can't allocate mem for new packet"); return -1; } switch (baud) { case 460800: cmd[4] = 0x00; bt_cb(skb)->pkt_type = PKT_BAUD_RATE_460800; break; case 230400: cmd[4] = 0x01; bt_cb(skb)->pkt_type = PKT_BAUD_RATE_230400; break; case 115200: cmd[4] = 0x02; bt_cb(skb)->pkt_type = PKT_BAUD_RATE_115200; break; case 57600: /* Fall through... */ default: cmd[4] = 0x03; bt_cb(skb)->pkt_type = PKT_BAUD_RATE_57600; break; } memcpy(skb_put(skb, sizeof(cmd)), cmd, sizeof(cmd)); skb_queue_tail(&(info->txq), skb); bluecard_write_wakeup(info); return 0; } /* ======================== HCI interface ======================== */ static int bluecard_hci_flush(struct hci_dev *hdev) { bluecard_info_t *info = hci_get_drvdata(hdev); /* Drop TX queue */ skb_queue_purge(&(info->txq)); return 0; } static int bluecard_hci_open(struct hci_dev *hdev) { bluecard_info_t *info = hci_get_drvdata(hdev); if (test_bit(CARD_HAS_PCCARD_ID, &(info->hw_state))) bluecard_hci_set_baud_rate(hdev, DEFAULT_BAUD_RATE); if (test_and_set_bit(HCI_RUNNING, &(hdev->flags))) return 0; if (test_bit(CARD_HAS_PCCARD_ID, &(info->hw_state))) { unsigned int iobase = info->p_dev->resource[0]->start; /* Enable LED */ outb(0x08 | 0x20, iobase + 0x30); } return 0; } static int bluecard_hci_close(struct hci_dev *hdev) { bluecard_info_t *info = hci_get_drvdata(hdev); if (!test_and_clear_bit(HCI_RUNNING, &(hdev->flags))) return 0; bluecard_hci_flush(hdev); if (test_bit(CARD_HAS_PCCARD_ID, &(info->hw_state))) { unsigned int iobase = info->p_dev->resource[0]->start; /* Disable LED */ outb(0x00, iobase + 0x30); } return 0; } static int bluecard_hci_send_frame(struct sk_buff *skb) { bluecard_info_t *info; struct hci_dev *hdev = (struct hci_dev *)(skb->dev); if (!hdev) { BT_ERR("Frame for unknown HCI device (hdev=NULL)"); return -ENODEV; } info = hci_get_drvdata(hdev); switch (bt_cb(skb)->pkt_type) { 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), &bt_cb(skb)->pkt_type, 1); skb_queue_tail(&(info->txq), skb); bluecard_write_wakeup(info); return 0; } static int bluecard_hci_ioctl(struct hci_dev *hdev, unsigned int cmd, unsigned long arg) { return -ENOIOCTLCMD; } /* ======================== Card services HCI interaction ======================== */ static int bluecard_open(bluecard_info_t *info) { unsigned int iobase = info->p_dev->resource[0]->start; struct hci_dev *hdev; unsigned char id; spin_lock_init(&(info->lock)); init_timer(&(info->timer)); info->timer.function = &bluecard_activity_led_timeout; info->timer.data = (u_long)info; 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 = bluecard_hci_open; hdev->close = bluecard_hci_close; hdev->flush = bluecard_hci_flush; hdev->send = bluecard_hci_send_frame; hdev->ioctl = bluecard_hci_ioctl; id = inb(iobase + 0x30); if ((id & 0x0f) == 0x02) set_bit(CARD_HAS_PCCARD_ID, &(info->hw_state)); if (id & 0x10) set_bit(CARD_HAS_POWER_LED, &(info->hw_state)); if (id & 0x20) set_bit(CARD_HAS_ACTIVITY_LED, &(info->hw_state)); /* Reset card */ info->ctrl_reg = REG_CONTROL_BT_RESET | REG_CONTROL_CARD_RESET; outb(info->ctrl_reg, iobase + REG_CONTROL); /* Turn FPGA off */ outb(0x80, iobase + 0x30); /* Wait some time */ msleep(10); /* Turn FPGA on */ outb(0x00, iobase + 0x30); /* Activate card */ info->ctrl_reg = REG_CONTROL_BT_ON | REG_CONTROL_BT_RES_PU; outb(info->ctrl_reg, iobase + REG_CONTROL); /* Enable interrupt */ outb(0xff, iobase + REG_INTERRUPT); info->ctrl_reg |= REG_CONTROL_INTERRUPT; outb(info->ctrl_reg, iobase + REG_CONTROL); if ((id & 0x0f) == 0x03) { /* Disable RTS */ info->ctrl_reg |= REG_CONTROL_RTS; outb(info->ctrl_reg, iobase + REG_CONTROL); /* Set baud rate */ info->ctrl_reg |= 0x03; outb(info->ctrl_reg, iobase + REG_CONTROL); /* Enable RTS */ info->ctrl_reg &= ~REG_CONTROL_RTS; outb(info->ctrl_reg, iobase + REG_CONTROL); set_bit(XMIT_BUF_ONE_READY, &(info->tx_state)); set_bit(XMIT_BUF_TWO_READY, &(info->tx_state)); set_bit(XMIT_SENDING_READY, &(info->tx_state)); } /* Start the RX buffers */ outb(REG_COMMAND_RX_BUF_ONE, iobase + REG_COMMAND); outb(REG_COMMAND_RX_BUF_TWO, iobase + REG_COMMAND); /* Signal that the hardware is ready */ set_bit(CARD_READY, &(info->hw_state)); /* Drop TX queue */ skb_queue_purge(&(info->txq)); /* Control the point at which RTS is enabled */ outb((0x0f << RTS_LEVEL_SHIFT_BITS) | 1, iobase + REG_RX_CONTROL); /* Timeout before it is safe to send the first HCI packet */ msleep(1250); /* 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 bluecard_close(bluecard_info_t *info) { unsigned int iobase = info->p_dev->resource[0]->start; struct hci_dev *hdev = info->hdev; if (!hdev) return -ENODEV; bluecard_hci_close(hdev); clear_bit(CARD_READY, &(info->hw_state)); /* Reset card */ info->ctrl_reg = REG_CONTROL_BT_RESET | REG_CONTROL_CARD_RESET; outb(info->ctrl_reg, iobase + REG_CONTROL); /* Turn FPGA off */ outb(0x80, iobase + 0x30); hci_unregister_dev(hdev); hci_free_dev(hdev); return 0; } static int bluecard_probe(struct pcmcia_device *link) { bluecard_info_t *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; return bluecard_config(link); } static void bluecard_detach(struct pcmcia_device *link) { bluecard_release(link); } static int bluecard_config(struct pcmcia_device *link) { bluecard_info_t *info = link->priv; int i, n; link->config_index = 0x20; link->resource[0]->flags |= IO_DATA_PATH_WIDTH_8; link->resource[0]->end = 64; link->io_lines = 6; for (n = 0; n < 0x400; n += 0x40) { link->resource[0]->start = n ^ 0x300; i = pcmcia_request_io(link); if (i == 0) break; } if (i != 0) goto failed; i = pcmcia_request_irq(link, bluecard_interrupt); if (i != 0) goto failed; i = pcmcia_enable_device(link); if (i != 0) goto failed; if (bluecard_open(info) != 0) goto failed; return 0; failed: bluecard_release(link); return -ENODEV; } static void bluecard_release(struct pcmcia_device *link) { bluecard_info_t *info = link->priv; bluecard_close(info); del_timer(&(info->timer)); pcmcia_disable_device(link); } static const struct pcmcia_device_id bluecard_ids[] = { PCMCIA_DEVICE_PROD_ID12("BlueCard", "LSE041", 0xbaf16fbf, 0x657cc15e), PCMCIA_DEVICE_PROD_ID12("BTCFCARD", "LSE139", 0xe3987764, 0x2524b59c), PCMCIA_DEVICE_PROD_ID12("WSS", "LSE039", 0x0a0736ec, 0x24e6dfab), PCMCIA_DEVICE_NULL }; MODULE_DEVICE_TABLE(pcmcia, bluecard_ids); static struct pcmcia_driver bluecard_driver = { .owner = THIS_MODULE, .name = "bluecard_cs", .probe = bluecard_probe, .remove = bluecard_detach, .id_table = bluecard_ids, }; module_pcmcia_driver(bluecard_driver);