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drivers/bluetooth/dtl1_cs.c
12.4 KB
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/* * * 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. * */ |
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#include <linux/module.h> #include <linux/kernel.h> #include <linux/init.h> #include <linux/slab.h> #include <linux/types.h> |
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#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> |
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#include <asm/io.h> |
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#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 ======================== */ |
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struct dtl1_info { |
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struct pcmcia_device *p_dev; |
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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; |
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}; |
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|
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static int dtl1_config(struct pcmcia_device *link); |
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/* 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 |
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struct nsh { |
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u8 type; u8 zero; u16 len; |
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} __packed; /* Nokia Specific Header */ |
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#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; } |
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static void dtl1_write_wakeup(struct dtl1_info *info) |
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{ 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 { |
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unsigned int iobase = info->p_dev->resource[0]->start; |
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register struct sk_buff *skb; |
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int len; |
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clear_bit(XMIT_WAKEUP, &(info->tx_state)); |
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if (!pcmcia_dev_present(info->p_dev)) |
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return; |
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skb = skb_dequeue(&(info->txq)); if (!skb) |
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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)); } |
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static void dtl1_control(struct dtl1_info *info, struct sk_buff *skb) |
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{ u8 flowmask = *(u8 *)skb->data; int i; printk(KERN_INFO "Bluetooth: Nokia control data ="); |
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for (i = 0; i < skb->len; i++) |
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printk(" %02x", skb->data[i]); |
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|
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printk(" "); /* 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); } |
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static void dtl1_receive(struct dtl1_info *info) |
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{ unsigned int iobase; |
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struct nsh *nsh; |
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int boguscount = 0; if (!info) { BT_ERR("Unknown device"); return; } |
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iobase = info->p_dev->resource[0]->start; |
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do { info->hdev->stat.byte_rx++; /* Allocate packet */ |
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if (info->rx_skb == NULL) { info->rx_skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC); if (!info->rx_skb) { |
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BT_ERR("Can't allocate mem for new packet"); info->rx_state = RECV_WAIT_NSH; info->rx_count = NSHL; return; } |
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} |
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*skb_put(info->rx_skb, 1) = inb(iobase + UART_RX); |
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nsh = (struct nsh *)info->rx_skb->data; |
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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: |
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hci_skb_pkt_type(info->rx_skb) = nsh->type; |
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/* 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); |
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switch (hci_skb_pkt_type(info->rx_skb)) { |
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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 */ |
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hci_skb_pkt_type(info->rx_skb) &= 0x0f; |
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hci_recv_frame(info->hdev, info->rx_skb); |
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break; default: /* unknown packet */ |
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BT_ERR("Unknown HCI packet with type 0x%02x received", hci_skb_pkt_type(info->rx_skb)); |
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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); } |
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static irqreturn_t dtl1_interrupt(int irq, void *dev_inst) |
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{ |
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struct dtl1_info *info = dev_inst; |
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unsigned int iobase; unsigned char msr; int boguscount = 0; int iir, lsr; |
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irqreturn_t r = IRQ_NONE; |
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|
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if (!info || !info->hdev) /* our irq handler is shared */ return IRQ_NONE; |
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|
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iobase = info->p_dev->resource[0]->start; |
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spin_lock(&(info->lock)); iir = inb(iobase + UART_IIR) & UART_IIR_ID; while (iir) { |
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r = IRQ_HANDLED; |
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/* 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); |
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r = IRQ_HANDLED; |
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} spin_unlock(&(info->lock)); |
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return r; |
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} /* ======================== HCI interface ======================== */ static int dtl1_hci_open(struct hci_dev *hdev) { |
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return 0; } static int dtl1_hci_flush(struct hci_dev *hdev) { |
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struct dtl1_info *info = hci_get_drvdata(hdev); |
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/* Drop TX queue */ skb_queue_purge(&(info->txq)); return 0; } static int dtl1_hci_close(struct hci_dev *hdev) { |
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dtl1_hci_flush(hdev); return 0; } |
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static int dtl1_hci_send_frame(struct hci_dev *hdev, struct sk_buff *skb) |
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{ |
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struct dtl1_info *info = hci_get_drvdata(hdev); |
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struct sk_buff *s; |
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struct nsh nsh; |
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|
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switch (hci_skb_pkt_type(skb)) { |
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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; |
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default: return -EILSEQ; |
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} |
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nsh.zero = 0; nsh.len = skb->len; s = bt_skb_alloc(NSHL + skb->len + 1, GFP_ATOMIC); |
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if (!s) return -ENOMEM; |
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skb_reserve(s, NSHL); |
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skb_copy_from_linear_data(skb, skb_put(s, skb->len), skb->len); |
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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; } |
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/* ======================== Card services HCI interaction ======================== */ |
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static int dtl1_open(struct dtl1_info *info) |
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{ unsigned long flags; |
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unsigned int iobase = info->p_dev->resource[0]->start; |
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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; |
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hdev->bus = HCI_PCCARD; |
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hci_set_drvdata(hdev, info); |
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SET_HCIDEV_DEV(hdev, &info->p_dev->dev); |
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|
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hdev->open = dtl1_hci_open; hdev->close = dtl1_hci_close; hdev->flush = dtl1_hci_flush; hdev->send = dtl1_hci_send_frame; |
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|
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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); |
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info->ri_latch = inb(info->p_dev->resource[0]->start + UART_MSR) & UART_MSR_RI; |
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/* 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; } |
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static int dtl1_close(struct dtl1_info *info) |
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{ unsigned long flags; |
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unsigned int iobase = info->p_dev->resource[0]->start; |
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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); |
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hci_unregister_dev(hdev); |
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hci_free_dev(hdev); return 0; } |
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static int dtl1_probe(struct pcmcia_device *link) |
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{ |
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struct dtl1_info *info; |
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/* Create new info device */ |
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info = devm_kzalloc(&link->dev, sizeof(*info), GFP_KERNEL); |
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if (!info) |
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return -ENOMEM; |
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|
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info->p_dev = link; |
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link->priv = info; |
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link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_IO; |
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return dtl1_config(link); |
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} |
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static void dtl1_detach(struct pcmcia_device *link) |
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{ |
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struct dtl1_info *info = link->priv; |
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|
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dtl1_close(info); pcmcia_disable_device(link); |
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} |
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static int dtl1_confcheck(struct pcmcia_device *p_dev, void *priv_data) |
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{ |
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if ((p_dev->resource[1]->end) || (p_dev->resource[1]->end < 8)) |
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return -ENODEV; |
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p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH; p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_8; |
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return pcmcia_request_io(p_dev); |
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} |
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static int dtl1_config(struct pcmcia_device *link) |
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{ |
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struct dtl1_info *info = link->priv; |
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int ret; |
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|
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/* Look for a generic full-sized window */ |
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link->resource[0]->end = 8; |
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ret = pcmcia_loop_config(link, dtl1_confcheck, NULL); if (ret) |
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goto failed; |
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|
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ret = pcmcia_request_irq(link, dtl1_interrupt); if (ret) |
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goto failed; |
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|
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ret = pcmcia_enable_device(link); if (ret) |
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goto failed; |
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|
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547 548 |
ret = dtl1_open(info); if (ret) |
1da177e4c Linux-2.6.12-rc2 |
549 |
goto failed; |
15b99ac17 [PATCH] pcmcia: a... |
550 |
return 0; |
1da177e4c Linux-2.6.12-rc2 |
551 |
|
1da177e4c Linux-2.6.12-rc2 |
552 |
failed: |
5a0b8159e Bluetooth: dtl1: ... |
553 |
dtl1_detach(link); |
46afededc Bluetooth: cleanu... |
554 |
return ret; |
1da177e4c Linux-2.6.12-rc2 |
555 |
} |
25f8f54f6 pcmcia: Convert p... |
556 |
static const struct pcmcia_device_id dtl1_ids[] = { |
88eca2e52 [PATCH] pcmcia: i... |
557 |
PCMCIA_DEVICE_PROD_ID12("Nokia Mobile Phones", "DTL-1", 0xe1bfdd64, 0xe168480d), |
8602b4fe6 [Bluetooth] Add m... |
558 |
PCMCIA_DEVICE_PROD_ID12("Nokia Mobile Phones", "DTL-4", 0xe1bfdd64, 0x9102bc82), |
88eca2e52 [PATCH] pcmcia: i... |
559 |
PCMCIA_DEVICE_PROD_ID12("Socket", "CF", 0xb38bcc2e, 0x44ebf863), |
725a6abfe [PATCH] pcmcia: a... |
560 |
PCMCIA_DEVICE_PROD_ID12("Socket", "CF+ Personal Network Card", 0xb38bcc2e, 0xe732bae3), |
88eca2e52 [PATCH] pcmcia: i... |
561 562 563 |
PCMCIA_DEVICE_NULL }; MODULE_DEVICE_TABLE(pcmcia, dtl1_ids); |
1da177e4c Linux-2.6.12-rc2 |
564 565 |
static struct pcmcia_driver dtl1_driver = { .owner = THIS_MODULE, |
2e9b981a7 pcmcia: move driv... |
566 |
.name = "dtl1_cs", |
15b99ac17 [PATCH] pcmcia: a... |
567 |
.probe = dtl1_probe, |
cc3b4866b [PATCH] pcmcia: u... |
568 |
.remove = dtl1_detach, |
88eca2e52 [PATCH] pcmcia: i... |
569 |
.id_table = dtl1_ids, |
1da177e4c Linux-2.6.12-rc2 |
570 |
}; |
e0c005f4b drivers/bluetooth... |
571 |
module_pcmcia_driver(dtl1_driver); |