diff options
Diffstat (limited to 'drivers/char')
| -rw-r--r-- | drivers/char/nozomi.c | 61 |
1 files changed, 43 insertions, 18 deletions
diff --git a/drivers/char/nozomi.c b/drivers/char/nozomi.c index dfaab2322de3..6d0dc5f9b6bb 100644 --- a/drivers/char/nozomi.c +++ b/drivers/char/nozomi.c @@ -190,6 +190,14 @@ enum card_type { F32_8 = 8192, /* 3072 bytes downl. + 1024 bytes uplink * 2 -> 8192 */ }; +/* Initialization states a card can be in */ +enum card_state { + NOZOMI_STATE_UKNOWN = 0, + NOZOMI_STATE_ENABLED = 1, /* pci device enabled */ + NOZOMI_STATE_ALLOCATED = 2, /* config setup done */ + NOZOMI_STATE_READY = 3, /* flowcontrols received */ +}; + /* Two different toggle channels exist */ enum channel_type { CH_A = 0, @@ -385,6 +393,7 @@ struct nozomi { spinlock_t spin_mutex; /* secures access to registers and tty */ unsigned int index_start; + enum card_state state; u32 open_ttys; }; @@ -686,6 +695,7 @@ static int nozomi_read_config_table(struct nozomi *dc) dc->last_ier = dc->last_ier | CTRL_DL; writew(dc->last_ier, dc->reg_ier); + dc->state = NOZOMI_STATE_ALLOCATED; dev_info(&dc->pdev->dev, "Initialization OK!\n"); return 1; } @@ -944,6 +954,14 @@ static int receive_flow_control(struct nozomi *dc) case CTRL_APP2: port = PORT_APP2; enable_ier = APP2_DL; + if (dc->state == NOZOMI_STATE_ALLOCATED) { + /* + * After card initialization the flow control + * received for APP2 is always the last + */ + dc->state = NOZOMI_STATE_READY; + dev_info(&dc->pdev->dev, "Device READY!\n"); + } break; default: dev_err(&dc->pdev->dev, @@ -1366,22 +1384,12 @@ static int __devinit nozomi_card_init(struct pci_dev *pdev, dc->pdev = pdev; - /* Find out what card type it is */ - nozomi_get_card_type(dc); - ret = pci_enable_device(dc->pdev); if (ret) { dev_err(&pdev->dev, "Failed to enable PCI Device\n"); goto err_free; } - start = pci_resource_start(dc->pdev, 0); - if (start == 0) { - dev_err(&pdev->dev, "No I/O address for card detected\n"); - ret = -ENODEV; - goto err_disable_device; - } - ret = pci_request_regions(dc->pdev, NOZOMI_NAME); if (ret) { dev_err(&pdev->dev, "I/O address 0x%04x already in use\n", @@ -1389,6 +1397,16 @@ static int __devinit nozomi_card_init(struct pci_dev *pdev, goto err_disable_device; } + start = pci_resource_start(dc->pdev, 0); + if (start == 0) { + dev_err(&pdev->dev, "No I/O address for card detected\n"); + ret = -ENODEV; + goto err_rel_regs; + } + + /* Find out what card type it is */ + nozomi_get_card_type(dc); + dc->base_addr = ioremap(start, dc->card_type); if (!dc->base_addr) { dev_err(&pdev->dev, "Unable to map card MMIO\n"); @@ -1425,6 +1443,14 @@ static int __devinit nozomi_card_init(struct pci_dev *pdev, dc->index_start = ndev_idx * MAX_PORT; ndevs[ndev_idx] = dc; + pci_set_drvdata(pdev, dc); + + /* Enable RESET interrupt */ + dc->last_ier = RESET; + iowrite16(dc->last_ier, dc->reg_ier); + + dc->state = NOZOMI_STATE_ENABLED; + for (i = 0; i < MAX_PORT; i++) { mutex_init(&dc->port[i].tty_sem); dc->port[i].tty_open_count = 0; @@ -1433,12 +1459,6 @@ static int __devinit nozomi_card_init(struct pci_dev *pdev, &pdev->dev); } - /* Enable RESET interrupt. */ - dc->last_ier = RESET; - writew(dc->last_ier, dc->reg_ier); - - pci_set_drvdata(pdev, dc); - return 0; err_free_sbuf: @@ -1553,7 +1573,7 @@ static int ntty_open(struct tty_struct *tty, struct file *file) struct nozomi *dc = get_dc_by_tty(tty); unsigned long flags; - if (!port || !dc) + if (!port || !dc || dc->state != NOZOMI_STATE_READY) return -ENODEV; if (mutex_lock_interruptible(&port->tty_sem)) @@ -1716,6 +1736,10 @@ static int ntty_tiocmget(struct tty_struct *tty, struct file *file) static int ntty_tiocmset(struct tty_struct *tty, struct file *file, unsigned int set, unsigned int clear) { + struct nozomi *dc = get_dc_by_tty(tty); + unsigned long flags; + + spin_lock_irqsave(&dc->spin_mutex, flags); if (set & TIOCM_RTS) set_rts(tty, 1); else if (clear & TIOCM_RTS) @@ -1725,6 +1749,7 @@ static int ntty_tiocmset(struct tty_struct *tty, struct file *file, set_dtr(tty, 1); else if (clear & TIOCM_DTR) set_dtr(tty, 0); + spin_unlock_irqrestore(&dc->spin_mutex, flags); return 0; } @@ -1762,7 +1787,7 @@ static int ntty_ioctl_tiocgicount(struct port *port, void __user *argp) icount.brk = cnow.brk; icount.buf_overrun = cnow.buf_overrun; - return copy_to_user(argp, &icount, sizeof(icount)); + return copy_to_user(argp, &icount, sizeof(icount)) ? -EFAULT : 0; } static int ntty_ioctl(struct tty_struct *tty, struct file *file, |