diff options
Diffstat (limited to 'drivers/char')
-rw-r--r-- | drivers/char/Kconfig | 2 | ||||
-rw-r--r-- | drivers/char/agp/nvidia-agp.c | 3 | ||||
-rw-r--r-- | drivers/char/drm/drm_fops.c | 2 | ||||
-rw-r--r-- | drivers/char/drm/i810_dma.c | 2 | ||||
-rw-r--r-- | drivers/char/drm/i830_dma.c | 2 | ||||
-rw-r--r-- | drivers/char/ipmi/ipmi_msghandler.c | 4 | ||||
-rw-r--r-- | drivers/char/ipmi/ipmi_si_intf.c | 7 | ||||
-rw-r--r-- | drivers/char/ipmi/ipmi_watchdog.c | 6 | ||||
-rw-r--r-- | drivers/char/mem.c | 2 | ||||
-rw-r--r-- | drivers/char/misc.c | 2 | ||||
-rw-r--r-- | drivers/char/mxser.h | 2 | ||||
-rw-r--r-- | drivers/char/synclink.c | 33 | ||||
-rw-r--r-- | drivers/char/synclink_gt.c | 250 |
13 files changed, 263 insertions, 54 deletions
diff --git a/drivers/char/Kconfig b/drivers/char/Kconfig index 7a85b3a26ff..889cad07774 100644 --- a/drivers/char/Kconfig +++ b/drivers/char/Kconfig @@ -713,7 +713,7 @@ config NVRAM config RTC tristate "Enhanced Real Time Clock Support" - depends on !PPC && !PARISC && !IA64 && !M68K && (!SPARC || PCI) && !FRV + depends on !PPC && !PARISC && !IA64 && !M68K && (!SPARC || PCI) && !FRV && !ARM ---help--- If you say Y here and create a character special file /dev/rtc with major number 10 and minor number 135 using mknod ("man mknod"), you diff --git a/drivers/char/agp/nvidia-agp.c b/drivers/char/agp/nvidia-agp.c index 70b8ed9cd17..4c67135c12d 100644 --- a/drivers/char/agp/nvidia-agp.c +++ b/drivers/char/agp/nvidia-agp.c @@ -11,6 +11,7 @@ #include <linux/gfp.h> #include <linux/page-flags.h> #include <linux/mm.h> +#include <linux/jiffies.h> #include "agp.h" /* NVIDIA registers */ @@ -256,7 +257,7 @@ static void nvidia_tlbflush(struct agp_memory *mem) do { pci_read_config_dword(nvidia_private.dev_1, NVIDIA_1_WBC, &wbc_reg); - if ((signed)(end - jiffies) <= 0) { + if (time_before_eq(end, jiffies)) { printk(KERN_ERR PFX "TLB flush took more than 3 seconds.\n"); } diff --git a/drivers/char/drm/drm_fops.c b/drivers/char/drm/drm_fops.c index 641f7633878..b7f7951c458 100644 --- a/drivers/char/drm/drm_fops.c +++ b/drivers/char/drm/drm_fops.c @@ -175,7 +175,7 @@ int drm_stub_open(struct inode *inode, struct file *filp) drm_device_t *dev = NULL; int minor = iminor(inode); int err = -ENODEV; - struct file_operations *old_fops; + const struct file_operations *old_fops; DRM_DEBUG("\n"); diff --git a/drivers/char/drm/i810_dma.c b/drivers/char/drm/i810_dma.c index ae0aa6d7e0b..c658dde3633 100644 --- a/drivers/char/drm/i810_dma.c +++ b/drivers/char/drm/i810_dma.c @@ -126,7 +126,7 @@ static int i810_map_buffer(drm_buf_t * buf, struct file *filp) drm_device_t *dev = priv->head->dev; drm_i810_buf_priv_t *buf_priv = buf->dev_private; drm_i810_private_t *dev_priv = dev->dev_private; - struct file_operations *old_fops; + const struct file_operations *old_fops; int retcode = 0; if (buf_priv->currently_mapped == I810_BUF_MAPPED) diff --git a/drivers/char/drm/i830_dma.c b/drivers/char/drm/i830_dma.c index 163f2cbfe60..b0f815d8cea 100644 --- a/drivers/char/drm/i830_dma.c +++ b/drivers/char/drm/i830_dma.c @@ -128,7 +128,7 @@ static int i830_map_buffer(drm_buf_t * buf, struct file *filp) drm_device_t *dev = priv->head->dev; drm_i830_buf_priv_t *buf_priv = buf->dev_private; drm_i830_private_t *dev_priv = dev->dev_private; - struct file_operations *old_fops; + const struct file_operations *old_fops; unsigned long virtual; int retcode = 0; diff --git a/drivers/char/ipmi/ipmi_msghandler.c b/drivers/char/ipmi/ipmi_msghandler.c index b8fb87c6c29..40eb005b9d7 100644 --- a/drivers/char/ipmi/ipmi_msghandler.c +++ b/drivers/char/ipmi/ipmi_msghandler.c @@ -3744,7 +3744,7 @@ static int ipmi_init_msghandler(void) ipmi_timer.expires = jiffies + IPMI_TIMEOUT_JIFFIES; add_timer(&ipmi_timer); - notifier_chain_register(&panic_notifier_list, &panic_block); + atomic_notifier_chain_register(&panic_notifier_list, &panic_block); initialized = 1; @@ -3764,7 +3764,7 @@ static __exit void cleanup_ipmi(void) if (!initialized) return; - notifier_chain_unregister(&panic_notifier_list, &panic_block); + atomic_notifier_chain_unregister(&panic_notifier_list, &panic_block); /* This can't be called if any interfaces exist, so no worry about shutting down the interfaces. */ diff --git a/drivers/char/ipmi/ipmi_si_intf.c b/drivers/char/ipmi/ipmi_si_intf.c index 12f858dc999..35fbd4d8ed4 100644 --- a/drivers/char/ipmi/ipmi_si_intf.c +++ b/drivers/char/ipmi/ipmi_si_intf.c @@ -237,10 +237,10 @@ struct smi_info static int try_smi_init(struct smi_info *smi); -static struct notifier_block *xaction_notifier_list; +static ATOMIC_NOTIFIER_HEAD(xaction_notifier_list); static int register_xaction_notifier(struct notifier_block * nb) { - return notifier_chain_register(&xaction_notifier_list, nb); + return atomic_notifier_chain_register(&xaction_notifier_list, nb); } static void si_restart_short_timer(struct smi_info *smi_info); @@ -302,7 +302,8 @@ static enum si_sm_result start_next_msg(struct smi_info *smi_info) do_gettimeofday(&t); printk("**Start2: %d.%9.9d\n", t.tv_sec, t.tv_usec); #endif - err = notifier_call_chain(&xaction_notifier_list, 0, smi_info); + err = atomic_notifier_call_chain(&xaction_notifier_list, + 0, smi_info); if (err & NOTIFY_STOP_MASK) { rv = SI_SM_CALL_WITHOUT_DELAY; goto out; diff --git a/drivers/char/ipmi/ipmi_watchdog.c b/drivers/char/ipmi/ipmi_watchdog.c index 616539310d9..7ece9f3c8f7 100644 --- a/drivers/char/ipmi/ipmi_watchdog.c +++ b/drivers/char/ipmi/ipmi_watchdog.c @@ -1158,7 +1158,8 @@ static int __init ipmi_wdog_init(void) } register_reboot_notifier(&wdog_reboot_notifier); - notifier_chain_register(&panic_notifier_list, &wdog_panic_notifier); + atomic_notifier_chain_register(&panic_notifier_list, + &wdog_panic_notifier); printk(KERN_INFO PFX "driver initialized\n"); @@ -1176,7 +1177,8 @@ static __exit void ipmi_unregister_watchdog(void) release_nmi(&ipmi_nmi_handler); #endif - notifier_chain_unregister(&panic_notifier_list, &wdog_panic_notifier); + atomic_notifier_chain_unregister(&panic_notifier_list, + &wdog_panic_notifier); unregister_reboot_notifier(&wdog_reboot_notifier); if (! watchdog_user) diff --git a/drivers/char/mem.c b/drivers/char/mem.c index 5245ba1649e..66719f9d294 100644 --- a/drivers/char/mem.c +++ b/drivers/char/mem.c @@ -899,7 +899,7 @@ static const struct { unsigned int minor; char *name; umode_t mode; - struct file_operations *fops; + const struct file_operations *fops; } devlist[] = { /* list of minor devices */ {1, "mem", S_IRUSR | S_IWUSR | S_IRGRP, &mem_fops}, {2, "kmem", S_IRUSR | S_IWUSR | S_IRGRP, &kmem_fops}, diff --git a/drivers/char/misc.c b/drivers/char/misc.c index 3e4c0414a01..96eb2a709e2 100644 --- a/drivers/char/misc.c +++ b/drivers/char/misc.c @@ -129,7 +129,7 @@ static int misc_open(struct inode * inode, struct file * file) int minor = iminor(inode); struct miscdevice *c; int err = -ENODEV; - struct file_operations *old_fops, *new_fops = NULL; + const struct file_operations *old_fops, *new_fops = NULL; down(&misc_sem); diff --git a/drivers/char/mxser.h b/drivers/char/mxser.h index e7fd0b08e0b..7e188a4d602 100644 --- a/drivers/char/mxser.h +++ b/drivers/char/mxser.h @@ -118,7 +118,7 @@ // enable CTS interrupt #define MOXA_MUST_IER_ECTSI 0x80 -// eanble RTS interrupt +// enable RTS interrupt #define MOXA_MUST_IER_ERTSI 0x40 // enable Xon/Xoff interrupt #define MOXA_MUST_IER_XINT 0x20 diff --git a/drivers/char/synclink.c b/drivers/char/synclink.c index d68be61f0a4..fee2aca3f6a 100644 --- a/drivers/char/synclink.c +++ b/drivers/char/synclink.c @@ -941,17 +941,6 @@ static void* mgsl_get_text_ptr(void) return mgsl_get_text_ptr; } -/* - * tmp_buf is used as a temporary buffer by mgsl_write. We need to - * lock it in case the COPY_FROM_USER blocks while swapping in a page, - * and some other program tries to do a serial write at the same time. - * Since the lock will only come under contention when the system is - * swapping and available memory is low, it makes sense to share one - * buffer across all the serial ioports, since it significantly saves - * memory if large numbers of serial ports are open. - */ -static unsigned char *tmp_buf; - static inline int mgsl_paranoia_check(struct mgsl_struct *info, char *name, const char *routine) { @@ -2150,7 +2139,7 @@ static int mgsl_write(struct tty_struct * tty, if (mgsl_paranoia_check(info, tty->name, "mgsl_write")) goto cleanup; - if (!tty || !info->xmit_buf || !tmp_buf) + if (!tty || !info->xmit_buf) goto cleanup; if ( info->params.mode == MGSL_MODE_HDLC || @@ -3438,7 +3427,6 @@ static int mgsl_open(struct tty_struct *tty, struct file * filp) { struct mgsl_struct *info; int retval, line; - unsigned long page; unsigned long flags; /* verify range of specified line number */ @@ -3472,18 +3460,6 @@ static int mgsl_open(struct tty_struct *tty, struct file * filp) goto cleanup; } - if (!tmp_buf) { - page = get_zeroed_page(GFP_KERNEL); - if (!page) { - retval = -ENOMEM; - goto cleanup; - } - if (tmp_buf) - free_page(page); - else - tmp_buf = (unsigned char *) page; - } - info->tty->low_latency = (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0; spin_lock_irqsave(&info->netlock, flags); @@ -4502,11 +4478,6 @@ static void synclink_cleanup(void) kfree(tmp); } - if (tmp_buf) { - free_page((unsigned long) tmp_buf); - tmp_buf = NULL; - } - if (pci_registered) pci_unregister_driver(&synclink_pci_driver); } @@ -6025,7 +5996,7 @@ static void usc_set_async_mode( struct mgsl_struct *info ) * <15..8> ? RxFIFO IRQ Request Level * * Note: For async mode the receive FIFO level must be set - * to 0 to aviod the situation where the FIFO contains fewer bytes + * to 0 to avoid the situation where the FIFO contains fewer bytes * than the trigger level and no more data is expected. * * <7> 0 Exited Hunt IA (Interrupt Arm) diff --git a/drivers/char/synclink_gt.c b/drivers/char/synclink_gt.c index 738ec2f4e56..b4d1f4eea43 100644 --- a/drivers/char/synclink_gt.c +++ b/drivers/char/synclink_gt.c @@ -1,5 +1,5 @@ /* - * $Id: synclink_gt.c,v 4.22 2006/01/09 20:16:06 paulkf Exp $ + * $Id: synclink_gt.c,v 4.25 2006/02/06 21:20:33 paulkf Exp $ * * Device driver for Microgate SyncLink GT serial adapters. * @@ -92,7 +92,7 @@ * module identification */ static char *driver_name = "SyncLink GT"; -static char *driver_version = "$Revision: 4.22 $"; +static char *driver_version = "$Revision: 4.25 $"; static char *tty_driver_name = "synclink_gt"; static char *tty_dev_prefix = "ttySLG"; MODULE_LICENSE("GPL"); @@ -188,6 +188,20 @@ static void hdlcdev_exit(struct slgt_info *info); #define SLGT_REG_SIZE 256 /* + * conditional wait facility + */ +struct cond_wait { + struct cond_wait *next; + wait_queue_head_t q; + wait_queue_t wait; + unsigned int data; +}; +static void init_cond_wait(struct cond_wait *w, unsigned int data); +static void add_cond_wait(struct cond_wait **head, struct cond_wait *w); +static void remove_cond_wait(struct cond_wait **head, struct cond_wait *w); +static void flush_cond_wait(struct cond_wait **head); + +/* * DMA buffer descriptor and access macros */ struct slgt_desc @@ -269,6 +283,9 @@ struct slgt_info { struct timer_list tx_timer; struct timer_list rx_timer; + unsigned int gpio_present; + struct cond_wait *gpio_wait_q; + spinlock_t lock; /* spinlock for synchronizing with ISR */ struct work_struct task; @@ -379,6 +396,11 @@ static MGSL_PARAMS default_params = { #define MASK_OVERRUN BIT4 #define GSR 0x00 /* global status */ +#define JCR 0x04 /* JTAG control */ +#define IODR 0x08 /* GPIO direction */ +#define IOER 0x0c /* GPIO interrupt enable */ +#define IOVR 0x10 /* GPIO value */ +#define IOSR 0x14 /* GPIO interrupt status */ #define TDR 0x80 /* tx data */ #define RDR 0x80 /* rx data */ #define TCR 0x82 /* tx control */ @@ -503,6 +525,9 @@ static int tiocmset(struct tty_struct *tty, struct file *file, static void set_break(struct tty_struct *tty, int break_state); static int get_interface(struct slgt_info *info, int __user *if_mode); static int set_interface(struct slgt_info *info, int if_mode); +static int set_gpio(struct slgt_info *info, struct gpio_desc __user *gpio); +static int get_gpio(struct slgt_info *info, struct gpio_desc __user *gpio); +static int wait_gpio(struct slgt_info *info, struct gpio_desc __user *gpio); /* * driver functions @@ -1112,6 +1137,12 @@ static int ioctl(struct tty_struct *tty, struct file *file, return get_interface(info, argp); case MGSL_IOCSIF: return set_interface(info,(int)arg); + case MGSL_IOCSGPIO: + return set_gpio(info, argp); + case MGSL_IOCGGPIO: + return get_gpio(info, argp); + case MGSL_IOCWAITGPIO: + return wait_gpio(info, argp); case TIOCGICOUNT: spin_lock_irqsave(&info->lock,flags); cnow = info->icount; @@ -1762,10 +1793,6 @@ static void rx_async(struct slgt_info *info) DBGDATA(info, p, count, "rx"); for(i=0 ; i < count; i+=2, p+=2) { - if (tty && chars) { - tty_flip_buffer_push(tty); - chars = 0; - } ch = *p; icount->rx++; @@ -2158,6 +2185,24 @@ static void isr_txeom(struct slgt_info *info, unsigned short status) } } +static void isr_gpio(struct slgt_info *info, unsigned int changed, unsigned int state) +{ + struct cond_wait *w, *prev; + + /* wake processes waiting for specific transitions */ + for (w = info->gpio_wait_q, prev = NULL ; w != NULL ; w = w->next) { + if (w->data & changed) { + w->data = state; + wake_up_interruptible(&w->q); + if (prev != NULL) + prev->next = w->next; + else + info->gpio_wait_q = w->next; + } else + prev = w; + } +} + /* interrupt service routine * * irq interrupt number @@ -2193,6 +2238,22 @@ static irqreturn_t slgt_interrupt(int irq, void *dev_id, struct pt_regs * regs) } } + if (info->gpio_present) { + unsigned int state; + unsigned int changed; + while ((changed = rd_reg32(info, IOSR)) != 0) { + DBGISR(("%s iosr=%08x\n", info->device_name, changed)); + /* read latched state of GPIO signals */ + state = rd_reg32(info, IOVR); + /* clear pending GPIO interrupt bits */ + wr_reg32(info, IOSR, changed); + for (i=0 ; i < info->port_count ; i++) { + if (info->port_array[i] != NULL) + isr_gpio(info->port_array[i], changed, state); + } + } + } + for(i=0; i < info->port_count ; i++) { struct slgt_info *port = info->port_array[i]; @@ -2276,6 +2337,8 @@ static void shutdown(struct slgt_info *info) set_signals(info); } + flush_cond_wait(&info->gpio_wait_q); + spin_unlock_irqrestore(&info->lock,flags); if (info->tty) @@ -2650,6 +2713,175 @@ static int set_interface(struct slgt_info *info, int if_mode) return 0; } +/* + * set general purpose IO pin state and direction + * + * user_gpio fields: + * state each bit indicates a pin state + * smask set bit indicates pin state to set + * dir each bit indicates a pin direction (0=input, 1=output) + * dmask set bit indicates pin direction to set + */ +static int set_gpio(struct slgt_info *info, struct gpio_desc __user *user_gpio) +{ + unsigned long flags; + struct gpio_desc gpio; + __u32 data; + + if (!info->gpio_present) + return -EINVAL; + if (copy_from_user(&gpio, user_gpio, sizeof(gpio))) + return -EFAULT; + DBGINFO(("%s set_gpio state=%08x smask=%08x dir=%08x dmask=%08x\n", + info->device_name, gpio.state, gpio.smask, + gpio.dir, gpio.dmask)); + + spin_lock_irqsave(&info->lock,flags); + if (gpio.dmask) { + data = rd_reg32(info, IODR); + data |= gpio.dmask & gpio.dir; + data &= ~(gpio.dmask & ~gpio.dir); + wr_reg32(info, IODR, data); + } + if (gpio.smask) { + data = rd_reg32(info, IOVR); + data |= gpio.smask & gpio.state; + data &= ~(gpio.smask & ~gpio.state); + wr_reg32(info, IOVR, data); + } + spin_unlock_irqrestore(&info->lock,flags); + + return 0; +} + +/* + * get general purpose IO pin state and direction + */ +static int get_gpio(struct slgt_info *info, struct gpio_desc __user *user_gpio) +{ + struct gpio_desc gpio; + if (!info->gpio_present) + return -EINVAL; + gpio.state = rd_reg32(info, IOVR); + gpio.smask = 0xffffffff; + gpio.dir = rd_reg32(info, IODR); + gpio.dmask = 0xffffffff; + if (copy_to_user(user_gpio, &gpio, sizeof(gpio))) + return -EFAULT; + DBGINFO(("%s get_gpio state=%08x dir=%08x\n", + info->device_name, gpio.state, gpio.dir)); + return 0; +} + +/* + * conditional wait facility + */ +static void init_cond_wait(struct cond_wait *w, unsigned int data) +{ + init_waitqueue_head(&w->q); + init_waitqueue_entry(&w->wait, current); + w->data = data; +} + +static void add_cond_wait(struct cond_wait **head, struct cond_wait *w) +{ + set_current_state(TASK_INTERRUPTIBLE); + add_wait_queue(&w->q, &w->wait); + w->next = *head; + *head = w; +} + +static void remove_cond_wait(struct cond_wait **head, struct cond_wait *cw) +{ + struct cond_wait *w, *prev; + remove_wait_queue(&cw->q, &cw->wait); + set_current_state(TASK_RUNNING); + for (w = *head, prev = NULL ; w != NULL ; prev = w, w = w->next) { + if (w == cw) { + if (prev != NULL) + prev->next = w->next; + else + *head = w->next; + break; + } + } +} + +static void flush_cond_wait(struct cond_wait **head) +{ + while (*head != NULL) { + wake_up_interruptible(&(*head)->q); + *head = (*head)->next; + } +} + +/* + * wait for general purpose I/O pin(s) to enter specified state + * + * user_gpio fields: + * state - bit indicates target pin state + * smask - set bit indicates watched pin + * + * The wait ends when at least one watched pin enters the specified + * state. When 0 (no error) is returned, user_gpio->state is set to the + * state of all GPIO pins when the wait ends. + * + * Note: Each pin may be a dedicated input, dedicated output, or + * configurable input/output. The number and configuration of pins + * varies with the specific adapter model. Only input pins (dedicated + * or configured) can be monitored with this function. + */ +static int wait_gpio(struct slgt_info *info, struct gpio_desc __user *user_gpio) +{ + unsigned long flags; + int rc = 0; + struct gpio_desc gpio; + struct cond_wait wait; + u32 state; + + if (!info->gpio_present) + return -EINVAL; + if (copy_from_user(&gpio, user_gpio, sizeof(gpio))) + return -EFAULT; + DBGINFO(("%s wait_gpio() state=%08x smask=%08x\n", + info->device_name, gpio.state, gpio.smask)); + /* ignore output pins identified by set IODR bit */ + if ((gpio.smask &= ~rd_reg32(info, IODR)) == 0) + return -EINVAL; + init_cond_wait(&wait, gpio.smask); + + spin_lock_irqsave(&info->lock, flags); + /* enable interrupts for watched pins */ + wr_reg32(info, IOER, rd_reg32(info, IOER) | gpio.smask); + /* get current pin states */ + state = rd_reg32(info, IOVR); + + if (gpio.smask & ~(state ^ gpio.state)) { + /* already in target state */ + gpio.state = state; + } else { + /* wait for target state */ + add_cond_wait(&info->gpio_wait_q, &wait); + spin_unlock_irqrestore(&info->lock, flags); + schedule(); + if (signal_pending(current)) + rc = -ERESTARTSYS; + else + gpio.state = wait.data; + spin_lock_irqsave(&info->lock, flags); + remove_cond_wait(&info->gpio_wait_q, &wait); + } + + /* disable all GPIO interrupts if no waiting processes */ + if (info->gpio_wait_q == NULL) + wr_reg32(info, IOER, 0); + spin_unlock_irqrestore(&info->lock,flags); + + if ((rc == 0) && copy_to_user(user_gpio, &gpio, sizeof(gpio))) + rc = -EFAULT; + return rc; +} + static int modem_input_wait(struct slgt_info *info,int arg) { unsigned long flags; @@ -3166,8 +3398,10 @@ static void device_init(int adapter_num, struct pci_dev *pdev) } else { port_array[0]->irq_requested = 1; adapter_test(port_array[0]); - for (i=1 ; i < port_count ; i++) + for (i=1 ; i < port_count ; i++) { port_array[i]->init_error = port_array[0]->init_error; + port_array[i]->gpio_present = port_array[0]->gpio_present; + } } } } @@ -4301,7 +4535,7 @@ static int register_test(struct slgt_info *info) break; } } - + info->gpio_present = (rd_reg32(info, JCR) & BIT5) ? 1 : 0; info->init_error = rc ? 0 : DiagStatus_AddressFailure; return rc; } |