diff options
Diffstat (limited to 'drivers/input/serio/hp_sdc.c')
| -rw-r--r-- | drivers/input/serio/hp_sdc.c | 51 |
1 files changed, 39 insertions, 12 deletions
diff --git a/drivers/input/serio/hp_sdc.c b/drivers/input/serio/hp_sdc.c index 6af199805ff..852858e5d8d 100644 --- a/drivers/input/serio/hp_sdc.c +++ b/drivers/input/serio/hp_sdc.c @@ -67,10 +67,10 @@ #include <linux/module.h> #include <linux/ioport.h> #include <linux/time.h> +#include <linux/semaphore.h> #include <linux/slab.h> #include <linux/hil.h> #include <asm/io.h> -#include <asm/system.h> /* Machine-specific abstraction */ @@ -104,6 +104,10 @@ EXPORT_SYMBOL(__hp_sdc_enqueue_transaction); EXPORT_SYMBOL(hp_sdc_enqueue_transaction); EXPORT_SYMBOL(hp_sdc_dequeue_transaction); +static bool hp_sdc_disabled; +module_param_named(no_hpsdc, hp_sdc_disabled, bool, 0); +MODULE_PARM_DESC(no_hpsdc, "Do not enable HP SDC driver."); + static hp_i8042_sdc hp_sdc; /* All driver state is kept in here. */ /*************** primitives for use in any context *********************/ @@ -318,7 +322,7 @@ static void hp_sdc_tasklet(unsigned long foo) * it back to the application. and be less verbose. */ printk(KERN_WARNING PREFIX "read timeout (%ius)!\n", - tv.tv_usec - hp_sdc.rtv.tv_usec); + (int)(tv.tv_usec - hp_sdc.rtv.tv_usec)); curr->idx += hp_sdc.rqty; hp_sdc.rqty = 0; tmp = curr->seq[curr->actidx]; @@ -790,7 +794,7 @@ int hp_sdc_release_cooked_irq(hp_sdc_irqhook *callback) /************************* Keepalive timer task *********************/ -void hp_sdc_kicker (unsigned long data) +static void hp_sdc_kicker(unsigned long data) { tasklet_schedule(&hp_sdc.task); /* Re-insert the periodic task. */ @@ -814,6 +818,7 @@ static const struct parisc_device_id hp_sdc_tbl[] = { MODULE_DEVICE_TABLE(parisc, hp_sdc_tbl); static int __init hp_sdc_init_hppa(struct parisc_device *d); +static struct delayed_work moduleloader_work; static struct parisc_driver hp_sdc_driver = { .name = "hp_sdc", @@ -873,7 +878,7 @@ static int __init hp_sdc_init(void) #endif errstr = "IRQ not available for"; - if (request_irq(hp_sdc.irq, &hp_sdc_isr, IRQF_SHARED|IRQF_SAMPLE_RANDOM, + if (request_irq(hp_sdc.irq, &hp_sdc_isr, IRQF_SHARED, "HP SDC", &hp_sdc)) goto err1; @@ -899,7 +904,7 @@ static int __init hp_sdc_init(void) ts_sync[1] = 0x0f; ts_sync[2] = ts_sync[3] = ts_sync[4] = ts_sync[5] = 0; t_sync.act.semaphore = &s_sync; - init_MUTEX_LOCKED(&s_sync); + sema_init(&s_sync, 0); hp_sdc_enqueue_transaction(&t_sync); down(&s_sync); /* Wait for t_sync to complete */ @@ -925,8 +930,15 @@ static int __init hp_sdc_init(void) #if defined(__hppa__) +static void request_module_delayed(struct work_struct *work) +{ + request_module("hp_sdc_mlc"); +} + static int __init hp_sdc_init_hppa(struct parisc_device *d) { + int ret; + if (!d) return 1; if (hp_sdc.dev != NULL) @@ -939,17 +951,26 @@ static int __init hp_sdc_init_hppa(struct parisc_device *d) hp_sdc.data_io = d->hpa.start + 0x800; hp_sdc.status_io = d->hpa.start + 0x801; - return hp_sdc_init(); + INIT_DELAYED_WORK(&moduleloader_work, request_module_delayed); + + ret = hp_sdc_init(); + /* after successful initialization give SDC some time to settle + * and then load the hp_sdc_mlc upper layer driver */ + if (!ret) + schedule_delayed_work(&moduleloader_work, + msecs_to_jiffies(2000)); + + return ret; } #endif /* __hppa__ */ -#if !defined(__mc68000__) /* Link error on m68k! */ -static void __exit hp_sdc_exit(void) -#else static void hp_sdc_exit(void) -#endif { + /* do nothing if we don't have a SDC */ + if (!hp_sdc.dev) + return; + write_lock_irq(&hp_sdc.lock); /* Turn off all maskable "sub-function" irq's. */ @@ -963,11 +984,12 @@ static void hp_sdc_exit(void) free_irq(hp_sdc.irq, &hp_sdc); write_unlock_irq(&hp_sdc.lock); - del_timer(&hp_sdc.kicker); + del_timer_sync(&hp_sdc.kicker); tasklet_kill(&hp_sdc.task); #if defined(__hppa__) + cancel_delayed_work_sync(&moduleloader_work); if (unregister_parisc_driver(&hp_sdc_driver)) printk(KERN_WARNING PREFIX "Error unregistering HP SDC"); #endif @@ -983,6 +1005,11 @@ static int __init hp_sdc_register(void) unsigned char i; #endif + if (hp_sdc_disabled) { + printk(KERN_WARNING PREFIX "HP SDC driver disabled by no_hpsdc=1.\n"); + return -ENODEV; + } + hp_sdc.dev = NULL; hp_sdc.dev_err = 0; #if defined(__hppa__) @@ -1011,7 +1038,7 @@ static int __init hp_sdc_register(void) return hp_sdc.dev_err; } - init_MUTEX_LOCKED(&tq_init_sem); + sema_init(&tq_init_sem, 0); tq_init.actidx = 0; tq_init.idx = 1; |