Lines Matching refs:slave
48 * FSI slave engine control register offsets
93 uint32_t size; /* size of slave address space */
140 return fsi_slave_read(dev->slave, dev->addr + addr, val, size);
150 return fsi_slave_write(dev->slave, dev->addr + addr, val, size);
158 return fsi_slave_read(dev->slave, addr, val, sizeof(uint32_t));
169 static struct fsi_device *fsi_create_device(struct fsi_slave *slave)
177 dev->dev.parent = &slave->dev;
184 /* FSI slave support */
185 static int fsi_slave_calc_addr(struct fsi_slave *slave, uint32_t *addrp,
191 if (addr > slave->size)
194 /* For 23 bit addressing, we encode the extra two bits in the slave
195 * id (and the slave's actual ID needs to be 0).
198 if (slave->id != 0)
209 static int fsi_slave_report_and_clear_errors(struct fsi_slave *slave)
211 struct fsi_master *master = slave->master;
216 link = slave->link;
217 id = slave->id;
229 dev_dbg(&slave->dev, "status: 0x%08x, sisc: 0x%08x\n",
237 /* Encode slave local bus echo delay */
243 /* Encode slave local bus send delay */
249 /* Encode slave local bus clock rate ratio */
255 /* Encode slave ID */
269 static int fsi_slave_set_smode(struct fsi_slave *slave)
274 /* set our smode register with the slave ID field to 0; this enables
275 * extended slave addressing
277 smode = fsi_slave_smode(slave->id, slave->t_send_delay, slave->t_echo_delay);
280 return fsi_master_write(slave->master, slave->link, slave->id,
285 static int fsi_slave_handle_error(struct fsi_slave *slave, bool write,
288 struct fsi_master *master = slave->master;
296 link = slave->link;
297 id = slave->id;
299 dev_dbg(&slave->dev, "handling error on %s to 0x%08x[%zd]",
303 * communication with the slave
305 rc = fsi_slave_report_and_clear_errors(slave);
316 rc = fsi_slave_report_and_clear_errors(slave);
322 send_delay = slave->t_send_delay;
323 echo_delay = slave->t_echo_delay;
325 /* getting serious, reset the slave via BREAK */
330 slave->t_send_delay = send_delay;
331 slave->t_echo_delay = echo_delay;
333 rc = fsi_slave_set_smode(slave);
339 slave->t_send_delay,
340 slave->t_echo_delay);
342 return fsi_slave_report_and_clear_errors(slave);
345 int fsi_slave_read(struct fsi_slave *slave, uint32_t addr,
348 uint8_t id = slave->id;
351 rc = fsi_slave_calc_addr(slave, &addr, &id);
356 rc = fsi_master_read(slave->master, slave->link,
361 err_rc = fsi_slave_handle_error(slave, false, addr, size);
370 int fsi_slave_write(struct fsi_slave *slave, uint32_t addr,
373 uint8_t id = slave->id;
376 rc = fsi_slave_calc_addr(slave, &addr, &id);
381 rc = fsi_master_write(slave->master, slave->link,
386 err_rc = fsi_slave_handle_error(slave, true, addr, size);
395 extern int fsi_slave_claim_range(struct fsi_slave *slave,
401 if (addr + size > slave->size)
409 extern void fsi_slave_release_range(struct fsi_slave *slave,
445 /* Find a matching node for the slave engine at @address, using @size bytes
453 parent = dev_of_node(&dev->slave->dev);
466 static int fsi_slave_scan(struct fsi_slave *slave)
474 * We keep the peek mode and slave engines for the core; so start
485 rc = fsi_slave_read(slave, (i + 1) * sizeof(data),
488 dev_warn(&slave->dev,
489 "error reading slave registers\n");
496 dev_warn(&slave->dev,
497 "crc error in slave register at 0x%04x\n",
516 dev = fsi_create_device(slave);
520 dev->slave = slave;
527 dev_dbg(&slave->dev,
533 slave->master->idx, slave->link,
534 slave->id, i - 2);
539 dev_warn(&slave->dev, "add failed: %d\n", rc);
582 struct fsi_slave *slave = to_fsi_slave(kobj_to_dev(kobj));
595 rc = fsi_slave_read(slave, off, buf + total_len, read_len);
609 struct fsi_slave *slave = to_fsi_slave(kobj_to_dev(kobj));
622 rc = fsi_slave_write(slave, off, buf + total_len, write_len);
644 struct fsi_slave *slave = to_fsi_slave(dev);
646 fsi_free_minor(slave->dev.devt);
648 kfree(slave);
674 /* Find a matching node for the slave at (link, id). Returns NULL if none
697 struct fsi_slave *slave = filep->private_data;
714 rc = fsi_slave_read(slave, off, &data, read_len);
733 struct fsi_slave *slave = filep->private_data;
756 rc = fsi_slave_write(slave, off, &data, write_len);
784 struct fsi_slave *slave = container_of(inode->i_cdev, struct fsi_slave, cdev);
786 file->private_data = slave;
803 struct fsi_slave *slave = to_fsi_slave(dev);
804 struct fsi_master *master = slave->master;
809 master->term(master, slave->link, slave->id);
819 struct fsi_slave *slave = to_fsi_slave(dev);
821 return sprintf(buf, "%u\n", slave->t_send_delay);
827 struct fsi_slave *slave = to_fsi_slave(dev);
828 struct fsi_master *master = slave->master;
842 slave->t_send_delay = val;
843 slave->t_echo_delay = val;
845 rc = fsi_slave_set_smode(slave);
849 master->link_config(master, slave->link,
850 slave->t_send_delay,
851 slave->t_echo_delay);
863 struct fsi_slave *slave = to_fsi_slave(dev);
865 return sprintf(buf, "%d\n", slave->chip_id);
874 struct fsi_slave *slave = to_fsi_slave(dev);
876 return sprintf(buf, "0x%x\n", slave->cfam_id);
901 struct fsi_slave *slave = to_fsi_slave(dev);
904 return kasprintf(GFP_KERNEL, "fsi/cfam%d", slave->cdev_idx);
906 return kasprintf(GFP_KERNEL, "cfam%d", slave->cdev_idx);
942 static int __fsi_get_new_minor(struct fsi_slave *slave, enum fsi_dev_type type,
945 int cid = slave->chip_id;
975 return __fsi_get_new_minor(fdev->slave, type, out_dev, out_index);
988 struct fsi_slave *slave;
1001 dev_dbg(&master->dev, "can't read slave %02x:%02x %d\n",
1009 dev_warn(&master->dev, "slave %02x:%02x invalid cfam id CRC!\n",
1018 * clock, put the slave into async mode
1027 "can't set llmode on slave:%02x:%02x %d\n",
1031 /* We can communicate with a slave; create the slave device and
1034 slave = kzalloc(sizeof(*slave), GFP_KERNEL);
1035 if (!slave)
1038 dev_set_name(&slave->dev, "slave@%02x:%02x", link, id);
1039 slave->dev.type = &cfam_type;
1040 slave->dev.parent = &master->dev;
1041 slave->dev.of_node = fsi_slave_find_of_node(master, link, id);
1042 slave->dev.release = fsi_slave_release;
1043 device_initialize(&slave->dev);
1044 slave->cfam_id = cfam_id;
1045 slave->master = master;
1046 slave->link = link;
1047 slave->id = id;
1048 slave->size = FSI_SLAVE_SIZE_23b;
1049 slave->t_send_delay = 16;
1050 slave->t_echo_delay = 16;
1053 slave->chip_id = -1;
1054 if (slave->dev.of_node) {
1056 if (!of_property_read_u32(slave->dev.of_node, "chip-id", &prop))
1057 slave->chip_id = prop;
1066 "can't set slbus on slave:%02x:%02x %d\n", link, id,
1069 rc = fsi_slave_set_smode(slave);
1072 "can't set smode on slave:%02x:%02x %d\n",
1078 rc = __fsi_get_new_minor(slave, fsi_dev_cfam, &slave->dev.devt,
1079 &slave->cdev_idx);
1084 cdev_init(&slave->cdev, &cfam_fops);
1085 rc = cdev_device_add(&slave->cdev, &slave->dev);
1087 dev_err(&slave->dev, "Error %d creating slave device\n", rc);
1098 slave->t_send_delay,
1099 slave->t_echo_delay);
1102 rc = device_create_bin_file(&slave->dev, &fsi_slave_raw_attr);
1104 dev_warn(&slave->dev, "failed to create raw attr: %d\n", rc);
1107 rc = fsi_slave_scan(slave);
1109 dev_dbg(&master->dev, "failed during slave scan with: %d\n",
1115 fsi_free_minor(slave->dev.devt);
1117 of_node_put(slave->dev.of_node);
1118 kfree(slave);
1239 struct fsi_slave *slave = to_fsi_slave(dev);
1242 cdev_device_del(&slave->cdev, &slave->dev);