4 * Copyright (C) 2006 Sony Computer Entertainment Inc.
5 * Copyright 2006 Sony Corp.
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; version 2 of the License.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 #include <linux/kernel.h>
22 #include <linux/module.h>
23 #include <linux/interrupt.h>
26 #include <asm/lv1call.h>
27 #include <asm/bitops.h>
31 MODULE_AUTHOR("Sony Corporation");
32 MODULE_LICENSE("GPL v2");
33 MODULE_DESCRIPTION("ps3 vuart");
36 * vuart - An inter-partition data link service.
37 * port 0: PS3 AV Settings.
38 * port 2: PS3 System Manager.
40 * The vuart provides a bi-directional byte stream data link between logical
41 * partitions. Its primary role is as a communications link between the guest
42 * OS and the system policy module. The current HV does not support any
43 * connections other than those listed.
46 enum {PORT_COUNT = 3,};
51 PARAM_INTERRUPT_MASK = 2,
52 PARAM_RX_BUF_SIZE = 3, /* read only */
53 PARAM_RX_BYTES = 4, /* read only */
54 PARAM_TX_BUF_SIZE = 5, /* read only */
55 PARAM_TX_BYTES = 6, /* read only */
56 PARAM_INTERRUPT_STATUS = 7, /* read only */
59 enum vuart_interrupt_bit {
62 INTERRUPT_BIT_DISCONNECT = 2,
65 enum vuart_interrupt_mask {
66 INTERRUPT_MASK_TX = 1,
67 INTERRUPT_MASK_RX = 2,
68 INTERRUPT_MASK_DISCONNECT = 4,
72 * struct ports_bmp - bitmap indicating ports needing service.
74 * A 256 bit read only bitmap indicating ports needing service. Do not write
75 * to these bits. Must not cross a page boundary.
81 } __attribute__ ((aligned (32)));
83 /* redefine dev_dbg to do a syntax check */
87 static inline int __attribute__ ((format (printf, 2, 3))) dev_dbg(
88 const struct device *_dev, const char *fmt, ...) {return 0;}
91 #define dump_ports_bmp(_b) _dump_ports_bmp(_b, __func__, __LINE__)
92 static void __attribute__ ((unused)) _dump_ports_bmp(
93 const struct ports_bmp* bmp, const char* func, int line)
95 pr_debug("%s:%d: ports_bmp: %016lxh\n", func, line, bmp->status);
98 static int ps3_vuart_match_id_to_port(enum ps3_match_id match_id,
99 unsigned int *port_number)
102 case PS3_MATCH_ID_AV_SETTINGS:
105 case PS3_MATCH_ID_SYSTEM_MANAGER:
110 *port_number = UINT_MAX;
115 #define dump_port_params(_b) _dump_port_params(_b, __func__, __LINE__)
116 static void __attribute__ ((unused)) _dump_port_params(unsigned int port_number,
117 const char* func, int line)
120 static const char *strings[] = {
134 for (i = 0; i < ARRAY_SIZE(strings); i++) {
135 result = lv1_get_virtual_uart_param(port_number, i, &value);
138 pr_debug("%s:%d: port_%u: %s failed: %s\n", func, line,
139 port_number, strings[i], ps3_result(result));
142 pr_debug("%s:%d: port_%u: %s = %lxh\n",
143 func, line, port_number, strings[i], value);
148 struct vuart_triggers {
153 int ps3_vuart_get_triggers(struct ps3_vuart_port_device *dev,
154 struct vuart_triggers *trig)
160 result = lv1_get_virtual_uart_param(dev->port_number,
161 PARAM_TX_TRIGGER, &trig->tx);
164 dev_dbg(&dev->core, "%s:%d: tx_trigger failed: %s\n",
165 __func__, __LINE__, ps3_result(result));
169 result = lv1_get_virtual_uart_param(dev->port_number,
170 PARAM_RX_BUF_SIZE, &size);
173 dev_dbg(&dev->core, "%s:%d: tx_buf_size failed: %s\n",
174 __func__, __LINE__, ps3_result(result));
178 result = lv1_get_virtual_uart_param(dev->port_number,
179 PARAM_RX_TRIGGER, &val);
182 dev_dbg(&dev->core, "%s:%d: rx_trigger failed: %s\n",
183 __func__, __LINE__, ps3_result(result));
187 trig->rx = size - val;
189 dev_dbg(&dev->core, "%s:%d: tx %lxh, rx %lxh\n", __func__, __LINE__,
195 int ps3_vuart_set_triggers(struct ps3_vuart_port_device *dev, unsigned int tx,
201 result = lv1_set_virtual_uart_param(dev->port_number,
202 PARAM_TX_TRIGGER, tx);
205 dev_dbg(&dev->core, "%s:%d: tx_trigger failed: %s\n",
206 __func__, __LINE__, ps3_result(result));
210 result = lv1_get_virtual_uart_param(dev->port_number,
211 PARAM_RX_BUF_SIZE, &size);
214 dev_dbg(&dev->core, "%s:%d: tx_buf_size failed: %s\n",
215 __func__, __LINE__, ps3_result(result));
219 result = lv1_set_virtual_uart_param(dev->port_number,
220 PARAM_RX_TRIGGER, size - rx);
223 dev_dbg(&dev->core, "%s:%d: rx_trigger failed: %s\n",
224 __func__, __LINE__, ps3_result(result));
228 dev_dbg(&dev->core, "%s:%d: tx %xh, rx %xh\n", __func__, __LINE__,
234 static int ps3_vuart_get_rx_bytes_waiting(struct ps3_vuart_port_device *dev,
235 unsigned long *bytes_waiting)
237 int result = lv1_get_virtual_uart_param(dev->port_number,
238 PARAM_RX_BYTES, bytes_waiting);
241 dev_dbg(&dev->core, "%s:%d: rx_bytes failed: %s\n",
242 __func__, __LINE__, ps3_result(result));
244 dev_dbg(&dev->core, "%s:%d: %lxh\n", __func__, __LINE__,
249 static int ps3_vuart_set_interrupt_mask(struct ps3_vuart_port_device *dev,
254 dev_dbg(&dev->core, "%s:%d: %lxh\n", __func__, __LINE__, mask);
256 dev->interrupt_mask = mask;
258 result = lv1_set_virtual_uart_param(dev->port_number,
259 PARAM_INTERRUPT_MASK, dev->interrupt_mask);
262 dev_dbg(&dev->core, "%s:%d: interrupt_mask failed: %s\n",
263 __func__, __LINE__, ps3_result(result));
268 static int ps3_vuart_get_interrupt_mask(struct ps3_vuart_port_device *dev,
269 unsigned long *status)
271 int result = lv1_get_virtual_uart_param(dev->port_number,
272 PARAM_INTERRUPT_STATUS, status);
275 dev_dbg(&dev->core, "%s:%d: interrupt_status failed: %s\n",
276 __func__, __LINE__, ps3_result(result));
278 dev_dbg(&dev->core, "%s:%d: m %lxh, s %lxh, m&s %lxh\n",
279 __func__, __LINE__, dev->interrupt_mask, *status,
280 dev->interrupt_mask & *status);
285 int ps3_vuart_enable_interrupt_tx(struct ps3_vuart_port_device *dev)
287 return (dev->interrupt_mask & INTERRUPT_MASK_TX) ? 0
288 : ps3_vuart_set_interrupt_mask(dev, dev->interrupt_mask
289 | INTERRUPT_MASK_TX);
292 int ps3_vuart_enable_interrupt_rx(struct ps3_vuart_port_device *dev)
294 return (dev->interrupt_mask & INTERRUPT_MASK_RX) ? 0
295 : ps3_vuart_set_interrupt_mask(dev, dev->interrupt_mask
296 | INTERRUPT_MASK_RX);
299 int ps3_vuart_enable_interrupt_disconnect(struct ps3_vuart_port_device *dev)
301 return (dev->interrupt_mask & INTERRUPT_MASK_DISCONNECT) ? 0
302 : ps3_vuart_set_interrupt_mask(dev, dev->interrupt_mask
303 | INTERRUPT_MASK_DISCONNECT);
306 int ps3_vuart_disable_interrupt_tx(struct ps3_vuart_port_device *dev)
308 return (dev->interrupt_mask & INTERRUPT_MASK_TX)
309 ? ps3_vuart_set_interrupt_mask(dev, dev->interrupt_mask
310 & ~INTERRUPT_MASK_TX) : 0;
313 int ps3_vuart_disable_interrupt_rx(struct ps3_vuart_port_device *dev)
315 return (dev->interrupt_mask & INTERRUPT_MASK_RX)
316 ? ps3_vuart_set_interrupt_mask(dev, dev->interrupt_mask
317 & ~INTERRUPT_MASK_RX) : 0;
320 int ps3_vuart_disable_interrupt_disconnect(struct ps3_vuart_port_device *dev)
322 return (dev->interrupt_mask & INTERRUPT_MASK_DISCONNECT)
323 ? ps3_vuart_set_interrupt_mask(dev, dev->interrupt_mask
324 & ~INTERRUPT_MASK_DISCONNECT) : 0;
328 * ps3_vuart_raw_write - Low level write helper.
330 * Do not call ps3_vuart_raw_write directly, use ps3_vuart_write.
333 static int ps3_vuart_raw_write(struct ps3_vuart_port_device *dev,
334 const void* buf, unsigned int bytes, unsigned long *bytes_written)
338 dev_dbg(&dev->core, "%s:%d: %xh\n", __func__, __LINE__, bytes);
340 result = lv1_write_virtual_uart(dev->port_number,
341 ps3_mm_phys_to_lpar(__pa(buf)), bytes, bytes_written);
344 dev_dbg(&dev->core, "%s:%d: lv1_write_virtual_uart failed: "
345 "%s\n", __func__, __LINE__, ps3_result(result));
349 dev->stats.bytes_written += *bytes_written;
351 dev_dbg(&dev->core, "%s:%d: wrote %lxh/%xh=>%lxh\n", __func__,
352 __LINE__, *bytes_written, bytes, dev->stats.bytes_written);
358 * ps3_vuart_raw_read - Low level read helper.
360 * Do not call ps3_vuart_raw_read directly, use ps3_vuart_read.
363 static int ps3_vuart_raw_read(struct ps3_vuart_port_device *dev, void* buf,
364 unsigned int bytes, unsigned long *bytes_read)
368 dev_dbg(&dev->core, "%s:%d: %xh\n", __func__, __LINE__, bytes);
370 result = lv1_read_virtual_uart(dev->port_number,
371 ps3_mm_phys_to_lpar(__pa(buf)), bytes, bytes_read);
374 dev_dbg(&dev->core, "%s:%d: lv1_read_virtual_uart failed: %s\n",
375 __func__, __LINE__, ps3_result(result));
379 dev->stats.bytes_read += *bytes_read;
381 dev_dbg(&dev->core, "%s:%d: read %lxh/%xh=>%lxh\n", __func__, __LINE__,
382 *bytes_read, bytes, dev->stats.bytes_read);
388 * struct list_buffer - An element for a port device fifo buffer list.
392 struct list_head link;
393 const unsigned char *head;
394 const unsigned char *tail;
395 unsigned long dbg_number;
396 unsigned char data[];
400 * ps3_vuart_write - the entry point for writing data to a port
402 * If the port is idle on entry as much of the incoming data is written to
403 * the port as the port will accept. Otherwise a list buffer is created
404 * and any remaning incoming data is copied to that buffer. The buffer is
405 * then enqueued for transmision via the transmit interrupt.
408 int ps3_vuart_write(struct ps3_vuart_port_device *dev, const void* buf,
411 static unsigned long dbg_number;
414 struct list_buffer *lb;
416 dev_dbg(&dev->core, "%s:%d: %u(%xh) bytes\n", __func__, __LINE__,
419 spin_lock_irqsave(&dev->tx_list.lock, flags);
421 if (list_empty(&dev->tx_list.head)) {
422 unsigned long bytes_written;
424 result = ps3_vuart_raw_write(dev, buf, bytes, &bytes_written);
426 spin_unlock_irqrestore(&dev->tx_list.lock, flags);
430 "%s:%d: ps3_vuart_raw_write failed\n",
435 if (bytes_written == bytes) {
436 dev_dbg(&dev->core, "%s:%d: wrote %xh bytes\n",
437 __func__, __LINE__, bytes);
441 bytes -= bytes_written;
442 buf += bytes_written;
444 spin_unlock_irqrestore(&dev->tx_list.lock, flags);
446 lb = kmalloc(sizeof(struct list_buffer) + bytes, GFP_KERNEL);
452 memcpy(lb->data, buf, bytes);
454 lb->tail = lb->data + bytes;
455 lb->dbg_number = ++dbg_number;
457 spin_lock_irqsave(&dev->tx_list.lock, flags);
458 list_add_tail(&lb->link, &dev->tx_list.head);
459 ps3_vuart_enable_interrupt_tx(dev);
460 spin_unlock_irqrestore(&dev->tx_list.lock, flags);
462 dev_dbg(&dev->core, "%s:%d: queued buf_%lu, %xh bytes\n",
463 __func__, __LINE__, lb->dbg_number, bytes);
469 * ps3_vuart_read - the entry point for reading data from a port
471 * If enough bytes to satisfy the request are held in the buffer list those
472 * bytes are dequeued and copied to the caller's buffer. Emptied list buffers
473 * are retiered. If the request cannot be statified by bytes held in the list
474 * buffers -EAGAIN is returned.
477 int ps3_vuart_read(struct ps3_vuart_port_device *dev, void* buf,
481 struct list_buffer *lb, *n;
482 unsigned long bytes_read;
484 dev_dbg(&dev->core, "%s:%d: %u(%xh) bytes\n", __func__, __LINE__,
487 spin_lock_irqsave(&dev->rx_list.lock, flags);
489 if (dev->rx_list.bytes_held < bytes) {
490 spin_unlock_irqrestore(&dev->rx_list.lock, flags);
491 dev_dbg(&dev->core, "%s:%d: starved for %lxh bytes\n",
492 __func__, __LINE__, bytes - dev->rx_list.bytes_held);
496 list_for_each_entry_safe(lb, n, &dev->rx_list.head, link) {
497 bytes_read = min((unsigned int)(lb->tail - lb->head), bytes);
499 memcpy(buf, lb->head, bytes_read);
502 dev->rx_list.bytes_held -= bytes_read;
504 if (bytes_read < lb->tail - lb->head) {
505 lb->head += bytes_read;
506 spin_unlock_irqrestore(&dev->rx_list.lock, flags);
509 "%s:%d: dequeued buf_%lu, %lxh bytes\n",
510 __func__, __LINE__, lb->dbg_number, bytes_read);
514 dev_dbg(&dev->core, "%s:%d free buf_%lu\n", __func__, __LINE__,
520 spin_unlock_irqrestore(&dev->rx_list.lock, flags);
522 dev_dbg(&dev->core, "%s:%d: dequeued buf_%lu, %xh bytes\n",
523 __func__, __LINE__, lb->dbg_number, bytes);
529 * ps3_vuart_handle_interrupt_tx - third stage transmit interrupt handler
531 * Services the transmit interrupt for the port. Writes as much data from the
532 * buffer list as the port will accept. Retires any emptied list buffers and
533 * adjusts the final list buffer state for a partial write.
536 static int ps3_vuart_handle_interrupt_tx(struct ps3_vuart_port_device *dev)
540 struct list_buffer *lb, *n;
541 unsigned long bytes_total = 0;
543 dev_dbg(&dev->core, "%s:%d\n", __func__, __LINE__);
545 spin_lock_irqsave(&dev->tx_list.lock, flags);
547 list_for_each_entry_safe(lb, n, &dev->tx_list.head, link) {
549 unsigned long bytes_written;
551 result = ps3_vuart_raw_write(dev, lb->head, lb->tail - lb->head,
556 "%s:%d: ps3_vuart_raw_write failed\n",
561 bytes_total += bytes_written;
563 if (bytes_written < lb->tail - lb->head) {
564 lb->head += bytes_written;
566 "%s:%d cleared buf_%lu, %lxh bytes\n",
567 __func__, __LINE__, lb->dbg_number,
572 dev_dbg(&dev->core, "%s:%d free buf_%lu\n", __func__, __LINE__,
579 ps3_vuart_disable_interrupt_tx(dev);
581 spin_unlock_irqrestore(&dev->tx_list.lock, flags);
582 dev_dbg(&dev->core, "%s:%d wrote %lxh bytes total\n",
583 __func__, __LINE__, bytes_total);
588 * ps3_vuart_handle_interrupt_rx - third stage receive interrupt handler
590 * Services the receive interrupt for the port. Creates a list buffer and
591 * copies all waiting port data to that buffer and enqueues the buffer in the
592 * buffer list. Buffer list data is dequeued via ps3_vuart_read.
595 static int ps3_vuart_handle_interrupt_rx(struct ps3_vuart_port_device *dev)
597 static unsigned long dbg_number;
600 struct list_buffer *lb;
603 dev_dbg(&dev->core, "%s:%d\n", __func__, __LINE__);
605 result = ps3_vuart_get_rx_bytes_waiting(dev, &bytes);
612 /* add some extra space for recently arrived data */
616 lb = kmalloc(sizeof(struct list_buffer) + bytes, GFP_ATOMIC);
621 ps3_vuart_raw_read(dev, lb->data, bytes, &bytes);
624 lb->tail = lb->data + bytes;
625 lb->dbg_number = ++dbg_number;
627 spin_lock_irqsave(&dev->rx_list.lock, flags);
628 list_add_tail(&lb->link, &dev->rx_list.head);
629 dev->rx_list.bytes_held += bytes;
630 spin_unlock_irqrestore(&dev->rx_list.lock, flags);
632 dev_dbg(&dev->core, "%s:%d: queued buf_%lu, %lxh bytes\n",
633 __func__, __LINE__, lb->dbg_number, bytes);
638 static int ps3_vuart_handle_interrupt_disconnect(
639 struct ps3_vuart_port_device *dev)
641 dev_dbg(&dev->core, "%s:%d\n", __func__, __LINE__);
642 BUG_ON("no support");
647 * ps3_vuart_handle_port_interrupt - second stage interrupt handler
649 * Services any pending interrupt types for the port. Passes control to the
650 * third stage type specific interrupt handler. Returns control to the first
651 * stage handler after one iteration.
654 static int ps3_vuart_handle_port_interrupt(struct ps3_vuart_port_device *dev)
657 unsigned long status;
659 result = ps3_vuart_get_interrupt_mask(dev, &status);
664 dev_dbg(&dev->core, "%s:%d: status: %lxh\n", __func__, __LINE__,
667 if (status & INTERRUPT_MASK_DISCONNECT) {
668 dev->stats.disconnect_interrupts++;
669 result = ps3_vuart_handle_interrupt_disconnect(dev);
671 ps3_vuart_disable_interrupt_disconnect(dev);
674 if (status & INTERRUPT_MASK_TX) {
675 dev->stats.tx_interrupts++;
676 result = ps3_vuart_handle_interrupt_tx(dev);
678 ps3_vuart_disable_interrupt_tx(dev);
681 if (status & INTERRUPT_MASK_RX) {
682 dev->stats.rx_interrupts++;
683 result = ps3_vuart_handle_interrupt_rx(dev);
685 ps3_vuart_disable_interrupt_rx(dev);
691 struct vuart_private {
694 struct ps3_vuart_port_device *devices[PORT_COUNT];
695 const struct ports_bmp bmp;
699 * ps3_vuart_irq_handler - first stage interrupt handler
701 * Loops finding any interrupting port and its associated instance data.
702 * Passes control to the second stage port specific interrupt handler. Loops
703 * until all outstanding interrupts are serviced.
706 static irqreturn_t ps3_vuart_irq_handler(int irq, void *_private)
708 struct vuart_private *private;
711 private = (struct vuart_private *)_private;
716 dump_ports_bmp(&private->bmp);
718 port = (BITS_PER_LONG - 1) - __ilog2(private->bmp.status);
720 if (port == BITS_PER_LONG)
723 BUG_ON(port >= PORT_COUNT);
724 BUG_ON(!private->devices[port]);
726 ps3_vuart_handle_port_interrupt(private->devices[port]);
732 static int ps3_vuart_match(struct device *_dev, struct device_driver *_drv)
735 struct ps3_vuart_port_driver *drv = to_ps3_vuart_port_driver(_drv);
736 struct ps3_vuart_port_device *dev = to_ps3_vuart_port_device(_dev);
738 result = dev->match_id == drv->match_id;
740 dev_info(&dev->core, "%s:%d: dev=%u(%s), drv=%u(%s): %s\n", __func__,
741 __LINE__, dev->match_id, dev->core.bus_id, drv->match_id,
742 drv->core.name, (result ? "match" : "miss"));
747 static struct vuart_private vuart_private;
749 static int ps3_vuart_probe(struct device *_dev)
753 struct ps3_vuart_port_device *dev = to_ps3_vuart_port_device(_dev);
754 struct ps3_vuart_port_driver *drv =
755 to_ps3_vuart_port_driver(_dev->driver);
757 dev_dbg(&dev->core, "%s:%d\n", __func__, __LINE__);
761 result = ps3_vuart_match_id_to_port(dev->match_id, &dev->port_number);
764 dev_dbg(&dev->core, "%s:%d: unknown match_id (%d)\n",
765 __func__, __LINE__, dev->match_id);
770 if (vuart_private.devices[dev->port_number]) {
771 dev_dbg(&dev->core, "%s:%d: port busy (%d)\n", __func__,
772 __LINE__, dev->port_number);
777 vuart_private.devices[dev->port_number] = dev;
779 INIT_LIST_HEAD(&dev->tx_list.head);
780 spin_lock_init(&dev->tx_list.lock);
781 INIT_LIST_HEAD(&dev->rx_list.head);
782 spin_lock_init(&dev->rx_list.lock);
784 vuart_private.in_use++;
785 if (vuart_private.in_use == 1) {
786 result = ps3_alloc_vuart_irq(PS3_BINDING_CPU_ANY,
787 (void*)&vuart_private.bmp.status, &vuart_private.virq);
791 "%s:%d: ps3_alloc_vuart_irq failed (%d)\n",
792 __func__, __LINE__, result);
797 result = request_irq(vuart_private.virq, ps3_vuart_irq_handler,
798 IRQF_DISABLED, "vuart", &vuart_private);
801 dev_info(&dev->core, "%s:%d: request_irq failed (%d)\n",
802 __func__, __LINE__, result);
803 goto fail_request_irq;
807 ps3_vuart_set_interrupt_mask(dev, INTERRUPT_MASK_RX);
809 /* clear stale pending interrupts */
810 ps3_vuart_get_interrupt_mask(dev, &tmp);
812 ps3_vuart_set_triggers(dev, 1, 1);
815 result = drv->probe(dev);
818 dev_info(&dev->core, "%s:%d: no probe method\n", __func__,
823 dev_dbg(&dev->core, "%s:%d: drv->probe failed\n",
832 vuart_private.in_use--;
833 if (!vuart_private.in_use) {
834 ps3_free_vuart_irq(vuart_private.virq);
835 vuart_private.virq = NO_IRQ;
839 dev_dbg(&dev->core, "%s:%d failed\n", __func__, __LINE__);
843 static int ps3_vuart_remove(struct device *_dev)
845 struct ps3_vuart_port_device *dev = to_ps3_vuart_port_device(_dev);
846 struct ps3_vuart_port_driver *drv =
847 to_ps3_vuart_port_driver(_dev->driver);
849 dev_dbg(&dev->core, "%s:%d: %s\n", __func__, __LINE__,
852 BUG_ON(vuart_private.in_use < 1);
857 dev_dbg(&dev->core, "%s:%d: %s no remove method\n", __func__,
858 __LINE__, dev->core.bus_id);
860 vuart_private.in_use--;
862 if (!vuart_private.in_use) {
863 free_irq(vuart_private.virq, &vuart_private);
864 ps3_free_vuart_irq(vuart_private.virq);
865 vuart_private.virq = NO_IRQ;
870 static void ps3_vuart_shutdown(struct device *_dev)
872 struct ps3_vuart_port_device *dev = to_ps3_vuart_port_device(_dev);
873 struct ps3_vuart_port_driver *drv =
874 to_ps3_vuart_port_driver(_dev->driver);
876 dev_dbg(&dev->core, "%s:%d: %s\n", __func__, __LINE__,
882 dev_dbg(&dev->core, "%s:%d: %s no shutdown method\n", __func__,
883 __LINE__, dev->core.bus_id);
887 * ps3_vuart - The vuart instance.
889 * The vuart is managed as a bus that port devices connect to.
892 struct bus_type ps3_vuart = {
894 .match = ps3_vuart_match,
895 .probe = ps3_vuart_probe,
896 .remove = ps3_vuart_remove,
897 .shutdown = ps3_vuart_shutdown,
900 int __init ps3_vuart_init(void)
904 pr_debug("%s:%d:\n", __func__, __LINE__);
905 result = bus_register(&ps3_vuart);
910 void __exit ps3_vuart_exit(void)
912 pr_debug("%s:%d:\n", __func__, __LINE__);
913 bus_unregister(&ps3_vuart);
916 core_initcall(ps3_vuart_init);
917 module_exit(ps3_vuart_exit);
920 * ps3_vuart_port_release_device - Remove a vuart port device.
923 static void ps3_vuart_port_release_device(struct device *_dev)
925 struct ps3_vuart_port_device *dev = to_ps3_vuart_port_device(_dev);
927 memset(dev, 0xad, sizeof(struct ps3_vuart_port_device));
933 * ps3_vuart_port_device_register - Add a vuart port device.
936 int ps3_vuart_port_device_register(struct ps3_vuart_port_device *dev)
939 static unsigned int dev_count = 1;
941 dev->core.parent = NULL;
942 dev->core.bus = &ps3_vuart;
943 dev->core.release = ps3_vuart_port_release_device;
945 snprintf(dev->core.bus_id, sizeof(dev->core.bus_id), "vuart_%02x",
948 dev_dbg(&dev->core, "%s:%d register\n", __func__, __LINE__);
950 result = device_register(&dev->core);
955 EXPORT_SYMBOL_GPL(ps3_vuart_port_device_register);
958 * ps3_vuart_port_driver_register - Add a vuart port device driver.
961 int ps3_vuart_port_driver_register(struct ps3_vuart_port_driver *drv)
965 pr_debug("%s:%d: (%s)\n", __func__, __LINE__, drv->core.name);
966 drv->core.bus = &ps3_vuart;
967 result = driver_register(&drv->core);
971 EXPORT_SYMBOL_GPL(ps3_vuart_port_driver_register);
974 * ps3_vuart_port_driver_unregister - Remove a vuart port device driver.
977 void ps3_vuart_port_driver_unregister(struct ps3_vuart_port_driver *drv)
979 driver_unregister(&drv->core);
982 EXPORT_SYMBOL_GPL(ps3_vuart_port_driver_unregister);