iic.c (682b069c5c5643d26199cc1b65717f99c98bce9d) iic.c (473c90ac04cec0abbb414978c53e9c259c9129e8)
1/*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 1998, 2001 Nicolas Souchu
5 * Copyright (c) 2023 Juniper Networks, Inc.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without

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234 * We can only transfer up to sizeof(buffer) bytes in 1 shot, so loop until
235 * everything has been transferred.
236 */
237 while ((error == 0) && (uio->uio_resid > 0)) {
238
239 num_bytes = MIN(uio->uio_resid, sizeof(buffer));
240 transferred_bytes = 0;
241
1/*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 1998, 2001 Nicolas Souchu
5 * Copyright (c) 2023 Juniper Networks, Inc.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without

--- 225 unchanged lines hidden (view full) ---

234 * We can only transfer up to sizeof(buffer) bytes in 1 shot, so loop until
235 * everything has been transferred.
236 */
237 while ((error == 0) && (uio->uio_resid > 0)) {
238
239 num_bytes = MIN(uio->uio_resid, sizeof(buffer));
240 transferred_bytes = 0;
241
242 if (uio->uio_rw == UIO_WRITE) {
242 switch (uio->uio_rw) {
243 case UIO_WRITE:
243 error = uiomove(buffer, num_bytes, uio);
244
245 while ((error == 0) && (transferred_bytes < num_bytes)) {
246 written_bytes = 0;
247 error = iicbus_write(parent, &buffer[transferred_bytes],
248 num_bytes - transferred_bytes, &written_bytes, 0);
249 transferred_bytes += written_bytes;
250 }
244 error = uiomove(buffer, num_bytes, uio);
245
246 while ((error == 0) && (transferred_bytes < num_bytes)) {
247 written_bytes = 0;
248 error = iicbus_write(parent, &buffer[transferred_bytes],
249 num_bytes - transferred_bytes, &written_bytes, 0);
250 transferred_bytes += written_bytes;
251 }
251
252 } else if (uio->uio_rw == UIO_READ) {
252 break;
253 case UIO_READ:
253 error = iicbus_read(parent, buffer,
254 num_bytes, &transferred_bytes,
255 ((uio->uio_resid <= sizeof(buffer)) ? last : 0), 0);
256 if (error == 0)
257 error = uiomove(buffer, transferred_bytes, uio);
254 error = iicbus_read(parent, buffer,
255 num_bytes, &transferred_bytes,
256 ((uio->uio_resid <= sizeof(buffer)) ? last : 0), 0);
257 if (error == 0)
258 error = uiomove(buffer, transferred_bytes, uio);
259 break;
258 }
259 }
260
261 return (error);
262}
263
264static int
265iicuio(struct cdev *dev, struct uio *uio, int ioflag)

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285
286 error = iicbus_request_bus(parent, priv->sc->sc_dev,
287 (ioflag & O_NONBLOCK) ? IIC_DONTWAIT : (IIC_WAIT | IIC_INTR));
288 if (error != 0) {
289 IIC_UNLOCK(priv);
290 return (error);
291 }
292
260 }
261 }
262
263 return (error);
264}
265
266static int
267iicuio(struct cdev *dev, struct uio *uio, int ioflag)

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287
288 error = iicbus_request_bus(parent, priv->sc->sc_dev,
289 (ioflag & O_NONBLOCK) ? IIC_DONTWAIT : (IIC_WAIT | IIC_INTR));
290 if (error != 0) {
291 IIC_UNLOCK(priv);
292 return (error);
293 }
294
293 if (uio->uio_rw == UIO_READ)
295 switch (uio->uio_rw) {
296 case UIO_READ:
294 addr = priv->addr | LSB;
297 addr = priv->addr | LSB;
295 else
298 break;
299 case UIO_WRITE:
296 addr = priv->addr & ~LSB;
300 addr = priv->addr & ~LSB;
301 break;
302 }
297
298 error = iicbus_start(parent, addr, 0);
299 if (error != 0)
300 {
301 iicbus_release_bus(parent, priv->sc->sc_dev);
302 IIC_UNLOCK(priv);
303 return (error);
304 }

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304 error = iicbus_start(parent, addr, 0);
305 if (error != 0)
306 {
307 iicbus_release_bus(parent, priv->sc->sc_dev);
308 IIC_UNLOCK(priv);
309 return (error);
310 }

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