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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [drivers/] [bluetooth/] [dtl1_cs.c] - Rev 1765
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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. * */ #include <linux/config.h> #include <linux/module.h> #include <linux/kernel.h> #include <linux/init.h> #include <linux/slab.h> #include <linux/types.h> #include <linux/sched.h> #include <linux/timer.h> #include <linux/errno.h> #include <linux/ptrace.h> #include <linux/ioport.h> #include <linux/spinlock.h> #include <linux/skbuff.h> #include <linux/string.h> #include <linux/serial.h> #include <linux/serial_reg.h> #include <asm/system.h> #include <asm/bitops.h> #include <asm/io.h> #include <pcmcia/version.h> #include <pcmcia/cs_types.h> #include <pcmcia/cs.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 ======================== */ /* Bit map of interrupts to choose from */ static u_int irq_mask = 0xffff; static int irq_list[4] = { -1 }; MODULE_PARM(irq_mask, "i"); MODULE_PARM(irq_list, "1-4i"); MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); MODULE_DESCRIPTION("BlueZ driver for Nokia Connectivity Card DTL-1"); MODULE_LICENSE("GPL"); /* ======================== Local structures ======================== */ typedef struct dtl1_info_t { dev_link_t link; dev_node_t node; 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; } dtl1_info_t; void dtl1_config(dev_link_t *link); void dtl1_release(u_long arg); int dtl1_event(event_t event, int priority, event_callback_args_t *args); static dev_info_t dev_info = "dtl1_cs"; dev_link_t *dtl1_attach(void); void dtl1_detach(dev_link_t *); static dev_link_t *dev_list = NULL; /* 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 typedef struct { u8 type; u8 zero; u16 len; } __attribute__ ((packed)) nsh_t; /* 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(dtl1_info_t *info) { if (!info) { printk(KERN_WARNING "dtl1_cs: Call of write_wakeup for unknown device.\n"); 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 { register unsigned int iobase = info->link.io.BasePort1; register struct sk_buff *skb; register int len; clear_bit(XMIT_WAKEUP, &(info->tx_state)); if (!(info->link.state & DEV_PRESENT)) return; if (!(skb = skb_dequeue(&(info->txq)))) 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(dtl1_info_t *info, struct sk_buff *skb) { u8 flowmask = *(u8 *)skb->data; int i; printk(KERN_INFO "dtl1_cs: 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(dtl1_info_t *info) { unsigned int iobase; nsh_t *nsh; int boguscount = 0; if (!info) { printk(KERN_WARNING "dtl1_cs: Call of receive for unknown device.\n"); return; } iobase = info->link.io.BasePort1; do { info->hdev.stat.byte_rx++; /* Allocate packet */ if (info->rx_skb == NULL) if (!(info->rx_skb = bluez_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC))) { printk(KERN_WARNING "dtl1_cs: Can't allocate mem for new packet.\n"); info->rx_state = RECV_WAIT_NSH; info->rx_count = NSHL; return; } *skb_put(info->rx_skb, 1) = inb(iobase + UART_RX); nsh = (nsh_t *)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: 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 (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 */ info->rx_skb->dev = (void *)&(info->hdev); info->rx_skb->pkt_type &= 0x0f; hci_recv_frame(info->rx_skb); break; default: /* unknown packet */ printk(KERN_WARNING "dtl1_cs: Unknown HCI packet with type 0x%02x received.\n", 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 to long */ if (boguscount++ > 32) break; } while (inb(iobase + UART_LSR) & UART_LSR_DR); } void dtl1_interrupt(int irq, void *dev_inst, struct pt_regs *regs) { dtl1_info_t *info = dev_inst; unsigned int iobase; unsigned char msr; int boguscount = 0; int iir, lsr; if (!info) { printk(KERN_WARNING "dtl1_cs: Call of irq %d for unknown device.\n", irq); return; } iobase = info->link.io.BasePort1; spin_lock(&(info->lock)); iir = inb(iobase + UART_IIR) & UART_IIR_ID; while (iir) { /* Clear interrupt */ lsr = inb(iobase + UART_LSR); switch (iir) { case UART_IIR_RLSI: printk(KERN_NOTICE "dtl1_cs: RLSI\n"); 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: printk(KERN_NOTICE "dtl1_cs: Unhandled IIR=%#x\n", iir); break; } /* Make sure we don't stay here to 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); } spin_unlock(&(info->lock)); } /* ======================== 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) { dtl1_info_t *info = (dtl1_info_t *)(hdev->driver_data); /* 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 sk_buff *skb) { dtl1_info_t *info; struct hci_dev *hdev = (struct hci_dev *)(skb->dev); struct sk_buff *s; nsh_t nsh; if (!hdev) { printk(KERN_WARNING "dtl1_cs: Frame for unknown HCI device (hdev=NULL)."); return -ENODEV; } info = (dtl1_info_t *)(hdev->driver_data); switch (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; }; nsh.zero = 0; nsh.len = skb->len; s = bluez_skb_alloc(NSHL + skb->len + 1, GFP_ATOMIC); skb_reserve(s, NSHL); memcpy(skb_put(s, skb->len), skb->data, 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; } static void dtl1_hci_destruct(struct hci_dev *hdev) { } static int dtl1_hci_ioctl(struct hci_dev *hdev, unsigned int cmd, unsigned long arg) { return -ENOIOCTLCMD; } /* ======================== Card services HCI interaction ======================== */ int dtl1_open(dtl1_info_t *info) { unsigned long flags; unsigned int iobase = info->link.io.BasePort1; 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)); 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->link.io.BasePort1 + 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 */ set_current_state(TASK_INTERRUPTIBLE); schedule_timeout(HZ * 2); /* Initialize and register HCI device */ hdev = &(info->hdev); hdev->type = HCI_PCCARD; hdev->driver_data = info; hdev->open = dtl1_hci_open; hdev->close = dtl1_hci_close; hdev->flush = dtl1_hci_flush; hdev->send = dtl1_hci_send_frame; hdev->destruct = dtl1_hci_destruct; hdev->ioctl = dtl1_hci_ioctl; if (hci_register_dev(hdev) < 0) { printk(KERN_WARNING "dtl1_cs: Can't register HCI device %s.\n", hdev->name); return -ENODEV; } return 0; } int dtl1_close(dtl1_info_t *info) { unsigned long flags; unsigned int iobase = info->link.io.BasePort1; struct hci_dev *hdev = &(info->hdev); 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); if (hci_unregister_dev(hdev) < 0) printk(KERN_WARNING "dtl1_cs: Can't unregister HCI device %s.\n", hdev->name); return 0; } /* ======================== Card services ======================== */ static void cs_error(client_handle_t handle, int func, int ret) { error_info_t err = { func, ret }; CardServices(ReportError, handle, &err); } dev_link_t *dtl1_attach(void) { dtl1_info_t *info; client_reg_t client_reg; dev_link_t *link; int i, ret; /* Create new info device */ info = kmalloc(sizeof(*info), GFP_KERNEL); if (!info) return NULL; memset(info, 0, sizeof(*info)); link = &info->link; link->priv = info; link->release.function = &dtl1_release; link->release.data = (u_long)link; link->io.Attributes1 = IO_DATA_PATH_WIDTH_8; link->io.NumPorts1 = 8; link->irq.Attributes = IRQ_TYPE_EXCLUSIVE | IRQ_HANDLE_PRESENT; link->irq.IRQInfo1 = IRQ_INFO2_VALID | IRQ_LEVEL_ID; if (irq_list[0] == -1) link->irq.IRQInfo2 = irq_mask; else for (i = 0; i < 4; i++) link->irq.IRQInfo2 |= 1 << irq_list[i]; link->irq.Handler = dtl1_interrupt; link->irq.Instance = info; link->conf.Attributes = CONF_ENABLE_IRQ; link->conf.Vcc = 50; link->conf.IntType = INT_MEMORY_AND_IO; /* Register with Card Services */ link->next = dev_list; dev_list = link; client_reg.dev_info = &dev_info; client_reg.Attributes = INFO_IO_CLIENT | INFO_CARD_SHARE; client_reg.EventMask = CS_EVENT_CARD_INSERTION | CS_EVENT_CARD_REMOVAL | CS_EVENT_RESET_PHYSICAL | CS_EVENT_CARD_RESET | CS_EVENT_PM_SUSPEND | CS_EVENT_PM_RESUME; client_reg.event_handler = &dtl1_event; client_reg.Version = 0x0210; client_reg.event_callback_args.client_data = link; ret = CardServices(RegisterClient, &link->handle, &client_reg); if (ret != CS_SUCCESS) { cs_error(link->handle, RegisterClient, ret); dtl1_detach(link); return NULL; } return link; } void dtl1_detach(dev_link_t *link) { dtl1_info_t *info = link->priv; dev_link_t **linkp; int ret; /* Locate device structure */ for (linkp = &dev_list; *linkp; linkp = &(*linkp)->next) if (*linkp == link) break; if (*linkp == NULL) return; del_timer(&link->release); if (link->state & DEV_CONFIG) dtl1_release((u_long)link); if (link->handle) { ret = CardServices(DeregisterClient, link->handle); if (ret != CS_SUCCESS) cs_error(link->handle, DeregisterClient, ret); } /* Unlink device structure, free bits */ *linkp = link->next; kfree(info); } static int get_tuple(int fn, client_handle_t handle, tuple_t *tuple, cisparse_t *parse) { int i; i = CardServices(fn, handle, tuple); if (i != CS_SUCCESS) return CS_NO_MORE_ITEMS; i = CardServices(GetTupleData, handle, tuple); if (i != CS_SUCCESS) return i; return CardServices(ParseTuple, handle, tuple, parse); } #define first_tuple(a, b, c) get_tuple(GetFirstTuple, a, b, c) #define next_tuple(a, b, c) get_tuple(GetNextTuple, a, b, c) void dtl1_config(dev_link_t *link) { client_handle_t handle = link->handle; dtl1_info_t *info = link->priv; tuple_t tuple; u_short buf[256]; cisparse_t parse; cistpl_cftable_entry_t *cf = &parse.cftable_entry; config_info_t config; int i, last_ret, last_fn; tuple.TupleData = (cisdata_t *)buf; tuple.TupleOffset = 0; tuple.TupleDataMax = 255; tuple.Attributes = 0; /* Get configuration register information */ tuple.DesiredTuple = CISTPL_CONFIG; last_ret = first_tuple(handle, &tuple, &parse); if (last_ret != CS_SUCCESS) { last_fn = ParseTuple; goto cs_failed; } link->conf.ConfigBase = parse.config.base; link->conf.Present = parse.config.rmask[0]; /* Configure card */ link->state |= DEV_CONFIG; i = CardServices(GetConfigurationInfo, handle, &config); link->conf.Vcc = config.Vcc; tuple.TupleData = (cisdata_t *)buf; tuple.TupleOffset = 0; tuple.TupleDataMax = 255; tuple.Attributes = 0; tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY; /* Look for a generic full-sized window */ link->io.NumPorts1 = 8; i = first_tuple(handle, &tuple, &parse); while (i != CS_NO_MORE_ITEMS) { if ((i == CS_SUCCESS) && (cf->io.nwin == 1) && (cf->io.win[0].len > 8)) { link->conf.ConfigIndex = cf->index; link->io.BasePort1 = cf->io.win[0].base; link->io.NumPorts1 = cf->io.win[0].len; /*yo */ link->io.IOAddrLines = cf->io.flags & CISTPL_IO_LINES_MASK; i = CardServices(RequestIO, link->handle, &link->io); if (i == CS_SUCCESS) break; } i = next_tuple(handle, &tuple, &parse); } if (i != CS_SUCCESS) { cs_error(link->handle, RequestIO, i); goto failed; } i = CardServices(RequestIRQ, link->handle, &link->irq); if (i != CS_SUCCESS) { cs_error(link->handle, RequestIRQ, i); link->irq.AssignedIRQ = 0; } i = CardServices(RequestConfiguration, link->handle, &link->conf); if (i != CS_SUCCESS) { cs_error(link->handle, RequestConfiguration, i); goto failed; } MOD_INC_USE_COUNT; if (dtl1_open(info) != 0) goto failed; strcpy(info->node.dev_name, info->hdev.name); link->dev = &info->node; link->state &= ~DEV_CONFIG_PENDING; return; cs_failed: cs_error(link->handle, last_fn, last_ret); failed: dtl1_release((u_long)link); } void dtl1_release(u_long arg) { dev_link_t *link = (dev_link_t *)arg; dtl1_info_t *info = link->priv; if (link->state & DEV_PRESENT) dtl1_close(info); MOD_DEC_USE_COUNT; link->dev = NULL; CardServices(ReleaseConfiguration, link->handle); CardServices(ReleaseIO, link->handle, &link->io); CardServices(ReleaseIRQ, link->handle, &link->irq); link->state &= ~DEV_CONFIG; } int dtl1_event(event_t event, int priority, event_callback_args_t *args) { dev_link_t *link = args->client_data; dtl1_info_t *info = link->priv; switch (event) { case CS_EVENT_CARD_REMOVAL: link->state &= ~DEV_PRESENT; if (link->state & DEV_CONFIG) { dtl1_close(info); mod_timer(&link->release, jiffies + HZ / 20); } break; case CS_EVENT_CARD_INSERTION: link->state |= DEV_PRESENT | DEV_CONFIG_PENDING; dtl1_config(link); break; case CS_EVENT_PM_SUSPEND: link->state |= DEV_SUSPEND; /* Fall through... */ case CS_EVENT_RESET_PHYSICAL: if (link->state & DEV_CONFIG) CardServices(ReleaseConfiguration, link->handle); break; case CS_EVENT_PM_RESUME: link->state &= ~DEV_SUSPEND; /* Fall through... */ case CS_EVENT_CARD_RESET: if (DEV_OK(link)) CardServices(RequestConfiguration, link->handle, &link->conf); break; } return 0; } /* ======================== Module initialization ======================== */ int __init init_dtl1_cs(void) { servinfo_t serv; int err; CardServices(GetCardServicesInfo, &serv); if (serv.Revision != CS_RELEASE_CODE) { printk(KERN_NOTICE "dtl1_cs: Card Services release does not match!\n"); return -1; } err = register_pccard_driver(&dev_info, &dtl1_attach, &dtl1_detach); return err; } void __exit exit_dtl1_cs(void) { unregister_pccard_driver(&dev_info); while (dev_list != NULL) dtl1_detach(dev_list); } module_init(init_dtl1_cs); module_exit(exit_dtl1_cs); EXPORT_NO_SYMBOLS;