Lines Matching refs:spidev
100 spidev_sync(struct spidev_data *spidev, struct spi_message *message) in spidev_sync() argument
105 spin_lock_irq(&spidev->spi_lock); in spidev_sync()
106 spi = spidev->spi; in spidev_sync()
107 spin_unlock_irq(&spidev->spi_lock); in spidev_sync()
121 spidev_sync_write(struct spidev_data *spidev, size_t len) in spidev_sync_write() argument
124 .tx_buf = spidev->tx_buffer, in spidev_sync_write()
126 .speed_hz = spidev->speed_hz, in spidev_sync_write()
132 return spidev_sync(spidev, &m); in spidev_sync_write()
136 spidev_sync_read(struct spidev_data *spidev, size_t len) in spidev_sync_read() argument
139 .rx_buf = spidev->rx_buffer, in spidev_sync_read()
141 .speed_hz = spidev->speed_hz, in spidev_sync_read()
147 return spidev_sync(spidev, &m); in spidev_sync_read()
156 struct spidev_data *spidev; in spidev_read() local
163 spidev = filp->private_data; in spidev_read()
165 mutex_lock(&spidev->buf_lock); in spidev_read()
166 status = spidev_sync_read(spidev, count); in spidev_read()
170 missing = copy_to_user(buf, spidev->rx_buffer, status); in spidev_read()
176 mutex_unlock(&spidev->buf_lock); in spidev_read()
186 struct spidev_data *spidev; in spidev_write() local
194 spidev = filp->private_data; in spidev_write()
196 mutex_lock(&spidev->buf_lock); in spidev_write()
197 missing = copy_from_user(spidev->tx_buffer, buf, count); in spidev_write()
199 status = spidev_sync_write(spidev, count); in spidev_write()
202 mutex_unlock(&spidev->buf_lock); in spidev_write()
207 static int spidev_message(struct spidev_data *spidev, in spidev_message() argument
227 tx_buf = spidev->tx_buffer; in spidev_message()
228 rx_buf = spidev->rx_buffer; in spidev_message()
280 k_tmp->speed_hz = spidev->speed_hz; in spidev_message()
282 dev_dbg(&spidev->spi->dev, in spidev_message()
288 u_tmp->bits_per_word ? : spidev->spi->bits_per_word, in spidev_message()
290 u_tmp->speed_hz ? : spidev->spi->max_speed_hz); in spidev_message()
295 status = spidev_sync(spidev, &msg); in spidev_message()
300 rx_buf = spidev->rx_buffer; in spidev_message()
346 struct spidev_data *spidev; in spidev_ioctl() local
359 spidev = filp->private_data; in spidev_ioctl()
360 spin_lock_irq(&spidev->spi_lock); in spidev_ioctl()
361 spi = spi_dev_get(spidev->spi); in spidev_ioctl()
362 spin_unlock_irq(&spidev->spi_lock); in spidev_ioctl()
373 mutex_lock(&spidev->buf_lock); in spidev_ioctl()
393 retval = put_user(spidev->speed_hz, (__u32 __user *)arg); in spidev_ioctl()
458 spidev->speed_hz = tmp; in spidev_ioctl()
478 retval = spidev_message(spidev, ioc, n_ioc); in spidev_ioctl()
483 mutex_unlock(&spidev->buf_lock); in spidev_ioctl()
495 struct spidev_data *spidev; in spidev_compat_ioc_message() local
505 spidev = filp->private_data; in spidev_compat_ioc_message()
506 spin_lock_irq(&spidev->spi_lock); in spidev_compat_ioc_message()
507 spi = spi_dev_get(spidev->spi); in spidev_compat_ioc_message()
508 spin_unlock_irq(&spidev->spi_lock); in spidev_compat_ioc_message()
514 mutex_lock(&spidev->buf_lock); in spidev_compat_ioc_message()
532 retval = spidev_message(spidev, ioc, n_ioc); in spidev_compat_ioc_message()
536 mutex_unlock(&spidev->buf_lock); in spidev_compat_ioc_message()
557 struct spidev_data *spidev; in spidev_open() local
562 list_for_each_entry(spidev, &device_list, device_entry) { in spidev_open()
563 if (spidev->devt == inode->i_rdev) { in spidev_open()
574 if (!spidev->tx_buffer) { in spidev_open()
575 spidev->tx_buffer = kmalloc(bufsiz, GFP_KERNEL); in spidev_open()
576 if (!spidev->tx_buffer) { in spidev_open()
577 dev_dbg(&spidev->spi->dev, "open/ENOMEM\n"); in spidev_open()
583 if (!spidev->rx_buffer) { in spidev_open()
584 spidev->rx_buffer = kmalloc(bufsiz, GFP_KERNEL); in spidev_open()
585 if (!spidev->rx_buffer) { in spidev_open()
586 dev_dbg(&spidev->spi->dev, "open/ENOMEM\n"); in spidev_open()
592 spidev->users++; in spidev_open()
593 filp->private_data = spidev; in spidev_open()
600 kfree(spidev->tx_buffer); in spidev_open()
601 spidev->tx_buffer = NULL; in spidev_open()
609 struct spidev_data *spidev; in spidev_release() local
612 spidev = filp->private_data; in spidev_release()
616 spidev->users--; in spidev_release()
617 if (!spidev->users) { in spidev_release()
620 kfree(spidev->tx_buffer); in spidev_release()
621 spidev->tx_buffer = NULL; in spidev_release()
623 kfree(spidev->rx_buffer); in spidev_release()
624 spidev->rx_buffer = NULL; in spidev_release()
626 spin_lock_irq(&spidev->spi_lock); in spidev_release()
627 if (spidev->spi) in spidev_release()
628 spidev->speed_hz = spidev->spi->max_speed_hz; in spidev_release()
631 dofree = (spidev->spi == NULL); in spidev_release()
632 spin_unlock_irq(&spidev->spi_lock); in spidev_release()
635 kfree(spidev); in spidev_release()
718 struct spidev_data *spidev; in spidev_probe() local
736 spidev = kzalloc(sizeof(*spidev), GFP_KERNEL); in spidev_probe()
737 if (!spidev) in spidev_probe()
741 spidev->spi = spi; in spidev_probe()
742 spin_lock_init(&spidev->spi_lock); in spidev_probe()
743 mutex_init(&spidev->buf_lock); in spidev_probe()
745 INIT_LIST_HEAD(&spidev->device_entry); in spidev_probe()
755 spidev->devt = MKDEV(SPIDEV_MAJOR, minor); in spidev_probe()
756 dev = device_create(spidev_class, &spi->dev, spidev->devt, in spidev_probe()
757 spidev, "spidev%d.%d", in spidev_probe()
766 list_add(&spidev->device_entry, &device_list); in spidev_probe()
770 spidev->speed_hz = spi->max_speed_hz; in spidev_probe()
773 spi_set_drvdata(spi, spidev); in spidev_probe()
775 kfree(spidev); in spidev_probe()
782 struct spidev_data *spidev = spi_get_drvdata(spi); in spidev_remove() local
785 spin_lock_irq(&spidev->spi_lock); in spidev_remove()
786 spidev->spi = NULL; in spidev_remove()
787 spin_unlock_irq(&spidev->spi_lock); in spidev_remove()
791 list_del(&spidev->device_entry); in spidev_remove()
792 device_destroy(spidev_class, spidev->devt); in spidev_remove()
793 clear_bit(MINOR(spidev->devt), minors); in spidev_remove()
794 if (spidev->users == 0) in spidev_remove()
795 kfree(spidev); in spidev_remove()