2 * Freescale MPC85xx/MPC86xx RapidIO support
4 * Copyright (C) 2007, 2008 Freescale Semiconductor, Inc.
5 * Zhang Wei <wei.zhang@freescale.com>
7 * Copyright 2005 MontaVista Software, Inc.
8 * Matt Porter <mporter@kernel.crashing.org>
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License as published by the
12 * Free Software Foundation; either version 2 of the License, or (at your
13 * option) any later version.
16 #include <linux/init.h>
17 #include <linux/module.h>
18 #include <linux/types.h>
19 #include <linux/dma-mapping.h>
20 #include <linux/interrupt.h>
21 #include <linux/rio.h>
22 #include <linux/rio_drv.h>
23 #include <linux/of_platform.h>
24 #include <linux/delay.h>
28 /* RapidIO definition irq, which read from OF-tree */
29 #define IRQ_RIO_BELL(m) (((struct rio_priv *)(m->priv))->bellirq)
30 #define IRQ_RIO_TX(m) (((struct rio_priv *)(m->priv))->txirq)
31 #define IRQ_RIO_RX(m) (((struct rio_priv *)(m->priv))->rxirq)
33 #define RIO_ATMU_REGS_OFFSET 0x10c00
34 #define RIO_P_MSG_REGS_OFFSET 0x11000
35 #define RIO_S_MSG_REGS_OFFSET 0x13000
36 #define RIO_ESCSR 0x158
37 #define RIO_CCSR 0x15c
38 #define RIO_ISR_AACR 0x10120
39 #define RIO_ISR_AACR_AA 0x1 /* Accept All ID */
40 #define RIO_MAINT_WIN_SIZE 0x400000
41 #define RIO_DBELL_WIN_SIZE 0x1000
43 #define RIO_MSG_OMR_MUI 0x00000002
44 #define RIO_MSG_OSR_TE 0x00000080
45 #define RIO_MSG_OSR_QOI 0x00000020
46 #define RIO_MSG_OSR_QFI 0x00000010
47 #define RIO_MSG_OSR_MUB 0x00000004
48 #define RIO_MSG_OSR_EOMI 0x00000002
49 #define RIO_MSG_OSR_QEI 0x00000001
51 #define RIO_MSG_IMR_MI 0x00000002
52 #define RIO_MSG_ISR_TE 0x00000080
53 #define RIO_MSG_ISR_QFI 0x00000010
54 #define RIO_MSG_ISR_DIQI 0x00000001
56 #define RIO_MSG_DESC_SIZE 32
57 #define RIO_MSG_BUFFER_SIZE 4096
58 #define RIO_MIN_TX_RING_SIZE 2
59 #define RIO_MAX_TX_RING_SIZE 2048
60 #define RIO_MIN_RX_RING_SIZE 2
61 #define RIO_MAX_RX_RING_SIZE 2048
63 #define DOORBELL_DMR_DI 0x00000002
64 #define DOORBELL_DSR_TE 0x00000080
65 #define DOORBELL_DSR_QFI 0x00000010
66 #define DOORBELL_DSR_DIQI 0x00000001
67 #define DOORBELL_TID_OFFSET 0x02
68 #define DOORBELL_SID_OFFSET 0x04
69 #define DOORBELL_INFO_OFFSET 0x06
71 #define DOORBELL_MESSAGE_SIZE 0x08
72 #define DBELL_SID(x) (*(u16 *)(x + DOORBELL_SID_OFFSET))
73 #define DBELL_TID(x) (*(u16 *)(x + DOORBELL_TID_OFFSET))
74 #define DBELL_INF(x) (*(u16 *)(x + DOORBELL_INFO_OFFSET))
76 struct rio_atmu_regs {
137 struct rio_dbell_ring {
142 struct rio_msg_tx_ring {
145 void *virt_buffer[RIO_MAX_TX_RING_SIZE];
146 dma_addr_t phys_buffer[RIO_MAX_TX_RING_SIZE];
152 struct rio_msg_rx_ring {
155 void *virt_buffer[RIO_MAX_RX_RING_SIZE];
162 void __iomem *regs_win;
163 struct rio_atmu_regs __iomem *atmu_regs;
164 struct rio_atmu_regs __iomem *maint_atmu_regs;
165 struct rio_atmu_regs __iomem *dbell_atmu_regs;
166 void __iomem *dbell_win;
167 void __iomem *maint_win;
168 struct rio_msg_regs __iomem *msg_regs;
169 struct rio_dbell_ring dbell_ring;
170 struct rio_msg_tx_ring msg_tx_ring;
171 struct rio_msg_rx_ring msg_rx_ring;
178 * fsl_rio_doorbell_send - Send a MPC85xx doorbell message
179 * @mport: RapidIO master port info
180 * @index: ID of RapidIO interface
181 * @destid: Destination ID of target device
182 * @data: 16-bit info field of RapidIO doorbell message
184 * Sends a MPC85xx doorbell message. Returns %0 on success or
185 * %-EINVAL on failure.
187 static int fsl_rio_doorbell_send(struct rio_mport *mport,
188 int index, u16 destid, u16 data)
190 struct rio_priv *priv = mport->priv;
191 pr_debug("fsl_doorbell_send: index %d destid %4.4x data %4.4x\n",
192 index, destid, data);
193 switch (mport->phy_type) {
194 case RIO_PHY_PARALLEL:
195 out_be32(&priv->dbell_atmu_regs->rowtar, destid << 22);
196 out_be16(priv->dbell_win, data);
199 /* In the serial version silicons, such as MPC8548, MPC8641,
200 * below operations is must be.
202 out_be32(&priv->msg_regs->odmr, 0x00000000);
203 out_be32(&priv->msg_regs->odretcr, 0x00000004);
204 out_be32(&priv->msg_regs->oddpr, destid << 16);
205 out_be32(&priv->msg_regs->oddatr, data);
206 out_be32(&priv->msg_regs->odmr, 0x00000001);
214 * fsl_local_config_read - Generate a MPC85xx local config space read
215 * @mport: RapidIO master port info
216 * @index: ID of RapdiIO interface
217 * @offset: Offset into configuration space
218 * @len: Length (in bytes) of the maintenance transaction
219 * @data: Value to be read into
221 * Generates a MPC85xx local configuration space read. Returns %0 on
222 * success or %-EINVAL on failure.
224 static int fsl_local_config_read(struct rio_mport *mport,
225 int index, u32 offset, int len, u32 *data)
227 struct rio_priv *priv = mport->priv;
228 pr_debug("fsl_local_config_read: index %d offset %8.8x\n", index,
230 *data = in_be32(priv->regs_win + offset);
236 * fsl_local_config_write - Generate a MPC85xx local config space write
237 * @mport: RapidIO master port info
238 * @index: ID of RapdiIO interface
239 * @offset: Offset into configuration space
240 * @len: Length (in bytes) of the maintenance transaction
241 * @data: Value to be written
243 * Generates a MPC85xx local configuration space write. Returns %0 on
244 * success or %-EINVAL on failure.
246 static int fsl_local_config_write(struct rio_mport *mport,
247 int index, u32 offset, int len, u32 data)
249 struct rio_priv *priv = mport->priv;
251 ("fsl_local_config_write: index %d offset %8.8x data %8.8x\n",
252 index, offset, data);
253 out_be32(priv->regs_win + offset, data);
259 * fsl_rio_config_read - Generate a MPC85xx read maintenance transaction
260 * @mport: RapidIO master port info
261 * @index: ID of RapdiIO interface
262 * @destid: Destination ID of transaction
263 * @hopcount: Number of hops to target device
264 * @offset: Offset into configuration space
265 * @len: Length (in bytes) of the maintenance transaction
266 * @val: Location to be read into
268 * Generates a MPC85xx read maintenance transaction. Returns %0 on
269 * success or %-EINVAL on failure.
272 fsl_rio_config_read(struct rio_mport *mport, int index, u16 destid,
273 u8 hopcount, u32 offset, int len, u32 *val)
275 struct rio_priv *priv = mport->priv;
279 ("fsl_rio_config_read: index %d destid %d hopcount %d offset %8.8x len %d\n",
280 index, destid, hopcount, offset, len);
281 out_be32(&priv->maint_atmu_regs->rowtar,
282 (destid << 22) | (hopcount << 12) | ((offset & ~0x3) >> 9));
284 data = (u8 *) priv->maint_win + offset;
287 *val = in_8((u8 *) data);
290 *val = in_be16((u16 *) data);
293 *val = in_be32((u32 *) data);
301 * fsl_rio_config_write - Generate a MPC85xx write maintenance transaction
302 * @mport: RapidIO master port info
303 * @index: ID of RapdiIO interface
304 * @destid: Destination ID of transaction
305 * @hopcount: Number of hops to target device
306 * @offset: Offset into configuration space
307 * @len: Length (in bytes) of the maintenance transaction
308 * @val: Value to be written
310 * Generates an MPC85xx write maintenance transaction. Returns %0 on
311 * success or %-EINVAL on failure.
314 fsl_rio_config_write(struct rio_mport *mport, int index, u16 destid,
315 u8 hopcount, u32 offset, int len, u32 val)
317 struct rio_priv *priv = mport->priv;
320 ("fsl_rio_config_write: index %d destid %d hopcount %d offset %8.8x len %d val %8.8x\n",
321 index, destid, hopcount, offset, len, val);
322 out_be32(&priv->maint_atmu_regs->rowtar,
323 (destid << 22) | (hopcount << 12) | ((offset & ~0x3) >> 9));
325 data = (u8 *) priv->maint_win + offset;
328 out_8((u8 *) data, val);
331 out_be16((u16 *) data, val);
334 out_be32((u32 *) data, val);
342 * rio_hw_add_outb_message - Add message to the MPC85xx outbound message queue
343 * @mport: Master port with outbound message queue
344 * @rdev: Target of outbound message
345 * @mbox: Outbound mailbox
346 * @buffer: Message to add to outbound queue
347 * @len: Length of message
349 * Adds the @buffer message to the MPC85xx outbound message queue. Returns
350 * %0 on success or %-EINVAL on failure.
353 rio_hw_add_outb_message(struct rio_mport *mport, struct rio_dev *rdev, int mbox,
354 void *buffer, size_t len)
356 struct rio_priv *priv = mport->priv;
358 struct rio_tx_desc *desc = (struct rio_tx_desc *)priv->msg_tx_ring.virt
359 + priv->msg_tx_ring.tx_slot;
363 ("RIO: rio_hw_add_outb_message(): destid %4.4x mbox %d buffer %8.8x len %8.8x\n",
364 rdev->destid, mbox, (int)buffer, len);
366 if ((len < 8) || (len > RIO_MAX_MSG_SIZE)) {
371 /* Copy and clear rest of buffer */
372 memcpy(priv->msg_tx_ring.virt_buffer[priv->msg_tx_ring.tx_slot], buffer,
374 if (len < (RIO_MAX_MSG_SIZE - 4))
375 memset(priv->msg_tx_ring.virt_buffer[priv->msg_tx_ring.tx_slot]
376 + len, 0, RIO_MAX_MSG_SIZE - len);
378 switch (mport->phy_type) {
379 case RIO_PHY_PARALLEL:
380 /* Set mbox field for message */
381 desc->dport = mbox & 0x3;
383 /* Enable EOMI interrupt, set priority, and set destid */
384 desc->dattr = 0x28000000 | (rdev->destid << 2);
387 /* Set mbox field for message, and set destid */
388 desc->dport = (rdev->destid << 16) | (mbox & 0x3);
390 /* Enable EOMI interrupt and priority */
391 desc->dattr = 0x28000000;
395 /* Set transfer size aligned to next power of 2 (in double words) */
396 desc->dwcnt = is_power_of_2(len) ? len : 1 << get_bitmask_order(len);
398 /* Set snooping and source buffer address */
399 desc->saddr = 0x00000004
400 | priv->msg_tx_ring.phys_buffer[priv->msg_tx_ring.tx_slot];
402 /* Increment enqueue pointer */
403 omr = in_be32(&priv->msg_regs->omr);
404 out_be32(&priv->msg_regs->omr, omr | RIO_MSG_OMR_MUI);
406 /* Go to next descriptor */
407 if (++priv->msg_tx_ring.tx_slot == priv->msg_tx_ring.size)
408 priv->msg_tx_ring.tx_slot = 0;
414 EXPORT_SYMBOL_GPL(rio_hw_add_outb_message);
417 * fsl_rio_tx_handler - MPC85xx outbound message interrupt handler
418 * @irq: Linux interrupt number
419 * @dev_instance: Pointer to interrupt-specific data
421 * Handles outbound message interrupts. Executes a register outbound
422 * mailbox event handler and acks the interrupt occurrence.
425 fsl_rio_tx_handler(int irq, void *dev_instance)
428 struct rio_mport *port = (struct rio_mport *)dev_instance;
429 struct rio_priv *priv = port->priv;
431 osr = in_be32(&priv->msg_regs->osr);
433 if (osr & RIO_MSG_OSR_TE) {
434 pr_info("RIO: outbound message transmission error\n");
435 out_be32(&priv->msg_regs->osr, RIO_MSG_OSR_TE);
439 if (osr & RIO_MSG_OSR_QOI) {
440 pr_info("RIO: outbound message queue overflow\n");
441 out_be32(&priv->msg_regs->osr, RIO_MSG_OSR_QOI);
445 if (osr & RIO_MSG_OSR_EOMI) {
446 u32 dqp = in_be32(&priv->msg_regs->odqdpar);
447 int slot = (dqp - priv->msg_tx_ring.phys) >> 5;
448 port->outb_msg[0].mcback(port, priv->msg_tx_ring.dev_id, -1,
451 /* Ack the end-of-message interrupt */
452 out_be32(&priv->msg_regs->osr, RIO_MSG_OSR_EOMI);
460 * rio_open_outb_mbox - Initialize MPC85xx outbound mailbox
461 * @mport: Master port implementing the outbound message unit
462 * @dev_id: Device specific pointer to pass on event
463 * @mbox: Mailbox to open
464 * @entries: Number of entries in the outbound mailbox ring
466 * Initializes buffer ring, request the outbound message interrupt,
467 * and enables the outbound message unit. Returns %0 on success and
468 * %-EINVAL or %-ENOMEM on failure.
470 int rio_open_outb_mbox(struct rio_mport *mport, void *dev_id, int mbox, int entries)
473 struct rio_priv *priv = mport->priv;
475 if ((entries < RIO_MIN_TX_RING_SIZE) ||
476 (entries > RIO_MAX_TX_RING_SIZE) || (!is_power_of_2(entries))) {
481 /* Initialize shadow copy ring */
482 priv->msg_tx_ring.dev_id = dev_id;
483 priv->msg_tx_ring.size = entries;
485 for (i = 0; i < priv->msg_tx_ring.size; i++) {
486 priv->msg_tx_ring.virt_buffer[i] =
487 dma_alloc_coherent(NULL, RIO_MSG_BUFFER_SIZE,
488 &priv->msg_tx_ring.phys_buffer[i], GFP_KERNEL);
489 if (!priv->msg_tx_ring.virt_buffer[i]) {
491 for (j = 0; j < priv->msg_tx_ring.size; j++)
492 if (priv->msg_tx_ring.virt_buffer[j])
493 dma_free_coherent(NULL,
503 /* Initialize outbound message descriptor ring */
504 priv->msg_tx_ring.virt = dma_alloc_coherent(NULL,
505 priv->msg_tx_ring.size * RIO_MSG_DESC_SIZE,
506 &priv->msg_tx_ring.phys, GFP_KERNEL);
507 if (!priv->msg_tx_ring.virt) {
511 memset(priv->msg_tx_ring.virt, 0,
512 priv->msg_tx_ring.size * RIO_MSG_DESC_SIZE);
513 priv->msg_tx_ring.tx_slot = 0;
515 /* Point dequeue/enqueue pointers at first entry in ring */
516 out_be32(&priv->msg_regs->odqdpar, priv->msg_tx_ring.phys);
517 out_be32(&priv->msg_regs->odqepar, priv->msg_tx_ring.phys);
519 /* Configure for snooping */
520 out_be32(&priv->msg_regs->osar, 0x00000004);
522 /* Clear interrupt status */
523 out_be32(&priv->msg_regs->osr, 0x000000b3);
525 /* Hook up outbound message handler */
526 rc = request_irq(IRQ_RIO_TX(mport), fsl_rio_tx_handler, 0,
527 "msg_tx", (void *)mport);
532 * Configure outbound message unit
534 * Interrupts (all enabled, except QEIE)
538 out_be32(&priv->msg_regs->omr, 0x00100220);
540 /* Set number of entries */
541 out_be32(&priv->msg_regs->omr,
542 in_be32(&priv->msg_regs->omr) |
543 ((get_bitmask_order(entries) - 2) << 12));
545 /* Now enable the unit */
546 out_be32(&priv->msg_regs->omr, in_be32(&priv->msg_regs->omr) | 0x1);
552 dma_free_coherent(NULL, priv->msg_tx_ring.size * RIO_MSG_DESC_SIZE,
553 priv->msg_tx_ring.virt, priv->msg_tx_ring.phys);
556 for (i = 0; i < priv->msg_tx_ring.size; i++)
557 dma_free_coherent(NULL, RIO_MSG_BUFFER_SIZE,
558 priv->msg_tx_ring.virt_buffer[i],
559 priv->msg_tx_ring.phys_buffer[i]);
565 * rio_close_outb_mbox - Shut down MPC85xx outbound mailbox
566 * @mport: Master port implementing the outbound message unit
567 * @mbox: Mailbox to close
569 * Disables the outbound message unit, free all buffers, and
570 * frees the outbound message interrupt.
572 void rio_close_outb_mbox(struct rio_mport *mport, int mbox)
574 struct rio_priv *priv = mport->priv;
575 /* Disable inbound message unit */
576 out_be32(&priv->msg_regs->omr, 0);
579 dma_free_coherent(NULL, priv->msg_tx_ring.size * RIO_MSG_DESC_SIZE,
580 priv->msg_tx_ring.virt, priv->msg_tx_ring.phys);
583 free_irq(IRQ_RIO_TX(mport), (void *)mport);
587 * fsl_rio_rx_handler - MPC85xx inbound message interrupt handler
588 * @irq: Linux interrupt number
589 * @dev_instance: Pointer to interrupt-specific data
591 * Handles inbound message interrupts. Executes a registered inbound
592 * mailbox event handler and acks the interrupt occurrence.
595 fsl_rio_rx_handler(int irq, void *dev_instance)
598 struct rio_mport *port = (struct rio_mport *)dev_instance;
599 struct rio_priv *priv = port->priv;
601 isr = in_be32(&priv->msg_regs->isr);
603 if (isr & RIO_MSG_ISR_TE) {
604 pr_info("RIO: inbound message reception error\n");
605 out_be32((void *)&priv->msg_regs->isr, RIO_MSG_ISR_TE);
609 /* XXX Need to check/dispatch until queue empty */
610 if (isr & RIO_MSG_ISR_DIQI) {
612 * We implement *only* mailbox 0, but can receive messages
613 * for any mailbox/letter to that mailbox destination. So,
614 * make the callback with an unknown/invalid mailbox number
617 port->inb_msg[0].mcback(port, priv->msg_rx_ring.dev_id, -1, -1);
619 /* Ack the queueing interrupt */
620 out_be32(&priv->msg_regs->isr, RIO_MSG_ISR_DIQI);
628 * rio_open_inb_mbox - Initialize MPC85xx inbound mailbox
629 * @mport: Master port implementing the inbound message unit
630 * @dev_id: Device specific pointer to pass on event
631 * @mbox: Mailbox to open
632 * @entries: Number of entries in the inbound mailbox ring
634 * Initializes buffer ring, request the inbound message interrupt,
635 * and enables the inbound message unit. Returns %0 on success
636 * and %-EINVAL or %-ENOMEM on failure.
638 int rio_open_inb_mbox(struct rio_mport *mport, void *dev_id, int mbox, int entries)
641 struct rio_priv *priv = mport->priv;
643 if ((entries < RIO_MIN_RX_RING_SIZE) ||
644 (entries > RIO_MAX_RX_RING_SIZE) || (!is_power_of_2(entries))) {
649 /* Initialize client buffer ring */
650 priv->msg_rx_ring.dev_id = dev_id;
651 priv->msg_rx_ring.size = entries;
652 priv->msg_rx_ring.rx_slot = 0;
653 for (i = 0; i < priv->msg_rx_ring.size; i++)
654 priv->msg_rx_ring.virt_buffer[i] = NULL;
656 /* Initialize inbound message ring */
657 priv->msg_rx_ring.virt = dma_alloc_coherent(NULL,
658 priv->msg_rx_ring.size * RIO_MAX_MSG_SIZE,
659 &priv->msg_rx_ring.phys, GFP_KERNEL);
660 if (!priv->msg_rx_ring.virt) {
665 /* Point dequeue/enqueue pointers at first entry in ring */
666 out_be32(&priv->msg_regs->ifqdpar, (u32) priv->msg_rx_ring.phys);
667 out_be32(&priv->msg_regs->ifqepar, (u32) priv->msg_rx_ring.phys);
669 /* Clear interrupt status */
670 out_be32(&priv->msg_regs->isr, 0x00000091);
672 /* Hook up inbound message handler */
673 rc = request_irq(IRQ_RIO_RX(mport), fsl_rio_rx_handler, 0,
674 "msg_rx", (void *)mport);
676 dma_free_coherent(NULL, RIO_MSG_BUFFER_SIZE,
677 priv->msg_tx_ring.virt_buffer[i],
678 priv->msg_tx_ring.phys_buffer[i]);
683 * Configure inbound message unit:
685 * 4KB max message size
686 * Unmask all interrupt sources
689 out_be32(&priv->msg_regs->imr, 0x001b0060);
691 /* Set number of queue entries */
692 setbits32(&priv->msg_regs->imr, (get_bitmask_order(entries) - 2) << 12);
694 /* Now enable the unit */
695 setbits32(&priv->msg_regs->imr, 0x1);
702 * rio_close_inb_mbox - Shut down MPC85xx inbound mailbox
703 * @mport: Master port implementing the inbound message unit
704 * @mbox: Mailbox to close
706 * Disables the inbound message unit, free all buffers, and
707 * frees the inbound message interrupt.
709 void rio_close_inb_mbox(struct rio_mport *mport, int mbox)
711 struct rio_priv *priv = mport->priv;
712 /* Disable inbound message unit */
713 out_be32(&priv->msg_regs->imr, 0);
716 dma_free_coherent(NULL, priv->msg_rx_ring.size * RIO_MAX_MSG_SIZE,
717 priv->msg_rx_ring.virt, priv->msg_rx_ring.phys);
720 free_irq(IRQ_RIO_RX(mport), (void *)mport);
724 * rio_hw_add_inb_buffer - Add buffer to the MPC85xx inbound message queue
725 * @mport: Master port implementing the inbound message unit
726 * @mbox: Inbound mailbox number
727 * @buf: Buffer to add to inbound queue
729 * Adds the @buf buffer to the MPC85xx inbound message queue. Returns
730 * %0 on success or %-EINVAL on failure.
732 int rio_hw_add_inb_buffer(struct rio_mport *mport, int mbox, void *buf)
735 struct rio_priv *priv = mport->priv;
737 pr_debug("RIO: rio_hw_add_inb_buffer(), msg_rx_ring.rx_slot %d\n",
738 priv->msg_rx_ring.rx_slot);
740 if (priv->msg_rx_ring.virt_buffer[priv->msg_rx_ring.rx_slot]) {
742 "RIO: error adding inbound buffer %d, buffer exists\n",
743 priv->msg_rx_ring.rx_slot);
748 priv->msg_rx_ring.virt_buffer[priv->msg_rx_ring.rx_slot] = buf;
749 if (++priv->msg_rx_ring.rx_slot == priv->msg_rx_ring.size)
750 priv->msg_rx_ring.rx_slot = 0;
756 EXPORT_SYMBOL_GPL(rio_hw_add_inb_buffer);
759 * rio_hw_get_inb_message - Fetch inbound message from the MPC85xx message unit
760 * @mport: Master port implementing the inbound message unit
761 * @mbox: Inbound mailbox number
763 * Gets the next available inbound message from the inbound message queue.
764 * A pointer to the message is returned on success or NULL on failure.
766 void *rio_hw_get_inb_message(struct rio_mport *mport, int mbox)
768 struct rio_priv *priv = mport->priv;
769 u32 phys_buf, virt_buf;
773 phys_buf = in_be32(&priv->msg_regs->ifqdpar);
775 /* If no more messages, then bail out */
776 if (phys_buf == in_be32(&priv->msg_regs->ifqepar))
779 virt_buf = (u32) priv->msg_rx_ring.virt + (phys_buf
780 - priv->msg_rx_ring.phys);
781 buf_idx = (phys_buf - priv->msg_rx_ring.phys) / RIO_MAX_MSG_SIZE;
782 buf = priv->msg_rx_ring.virt_buffer[buf_idx];
786 "RIO: inbound message copy failed, no buffers\n");
790 /* Copy max message size, caller is expected to allocate that big */
791 memcpy(buf, (void *)virt_buf, RIO_MAX_MSG_SIZE);
793 /* Clear the available buffer */
794 priv->msg_rx_ring.virt_buffer[buf_idx] = NULL;
797 setbits32(&priv->msg_regs->imr, RIO_MSG_IMR_MI);
803 EXPORT_SYMBOL_GPL(rio_hw_get_inb_message);
806 * fsl_rio_dbell_handler - MPC85xx doorbell interrupt handler
807 * @irq: Linux interrupt number
808 * @dev_instance: Pointer to interrupt-specific data
810 * Handles doorbell interrupts. Parses a list of registered
811 * doorbell event handlers and executes a matching event handler.
814 fsl_rio_dbell_handler(int irq, void *dev_instance)
817 struct rio_mport *port = (struct rio_mport *)dev_instance;
818 struct rio_priv *priv = port->priv;
820 dsr = in_be32(&priv->msg_regs->dsr);
822 if (dsr & DOORBELL_DSR_TE) {
823 pr_info("RIO: doorbell reception error\n");
824 out_be32(&priv->msg_regs->dsr, DOORBELL_DSR_TE);
828 if (dsr & DOORBELL_DSR_QFI) {
829 pr_info("RIO: doorbell queue full\n");
830 out_be32(&priv->msg_regs->dsr, DOORBELL_DSR_QFI);
834 /* XXX Need to check/dispatch until queue empty */
835 if (dsr & DOORBELL_DSR_DIQI) {
837 (u32) priv->dbell_ring.virt +
838 (in_be32(&priv->msg_regs->dqdpar) & 0xfff);
839 struct rio_dbell *dbell;
843 ("RIO: processing doorbell, sid %2.2x tid %2.2x info %4.4x\n",
844 DBELL_SID(dmsg), DBELL_TID(dmsg), DBELL_INF(dmsg));
846 list_for_each_entry(dbell, &port->dbells, node) {
847 if ((dbell->res->start <= DBELL_INF(dmsg)) &&
848 (dbell->res->end >= DBELL_INF(dmsg))) {
854 dbell->dinb(port, dbell->dev_id, DBELL_SID(dmsg), DBELL_TID(dmsg),
858 ("RIO: spurious doorbell, sid %2.2x tid %2.2x info %4.4x\n",
859 DBELL_SID(dmsg), DBELL_TID(dmsg), DBELL_INF(dmsg));
861 setbits32(&priv->msg_regs->dmr, DOORBELL_DMR_DI);
862 out_be32(&priv->msg_regs->dsr, DOORBELL_DSR_DIQI);
870 * fsl_rio_doorbell_init - MPC85xx doorbell interface init
871 * @mport: Master port implementing the inbound doorbell unit
873 * Initializes doorbell unit hardware and inbound DMA buffer
874 * ring. Called from fsl_rio_setup(). Returns %0 on success
875 * or %-ENOMEM on failure.
877 static int fsl_rio_doorbell_init(struct rio_mport *mport)
879 struct rio_priv *priv = mport->priv;
882 /* Map outbound doorbell window immediately after maintenance window */
883 priv->dbell_win = ioremap(mport->iores.start + RIO_MAINT_WIN_SIZE,
885 if (!priv->dbell_win) {
887 "RIO: unable to map outbound doorbell window\n");
892 /* Initialize inbound doorbells */
893 priv->dbell_ring.virt = dma_alloc_coherent(NULL, 512 *
894 DOORBELL_MESSAGE_SIZE, &priv->dbell_ring.phys, GFP_KERNEL);
895 if (!priv->dbell_ring.virt) {
896 printk(KERN_ERR "RIO: unable allocate inbound doorbell ring\n");
898 iounmap(priv->dbell_win);
902 /* Point dequeue/enqueue pointers at first entry in ring */
903 out_be32(&priv->msg_regs->dqdpar, (u32) priv->dbell_ring.phys);
904 out_be32(&priv->msg_regs->dqepar, (u32) priv->dbell_ring.phys);
906 /* Clear interrupt status */
907 out_be32(&priv->msg_regs->dsr, 0x00000091);
909 /* Hook up doorbell handler */
910 rc = request_irq(IRQ_RIO_BELL(mport), fsl_rio_dbell_handler, 0,
911 "dbell_rx", (void *)mport);
913 iounmap(priv->dbell_win);
914 dma_free_coherent(NULL, 512 * DOORBELL_MESSAGE_SIZE,
915 priv->dbell_ring.virt, priv->dbell_ring.phys);
917 "MPC85xx RIO: unable to request inbound doorbell irq");
921 /* Configure doorbells for snooping, 512 entries, and enable */
922 out_be32(&priv->msg_regs->dmr, 0x00108161);
928 static char *cmdline = NULL;
930 static int fsl_rio_get_hdid(int index)
932 /* XXX Need to parse multiple entries in some format */
936 return simple_strtol(cmdline, NULL, 0);
939 static int fsl_rio_get_cmdline(char *s)
948 __setup("riohdid=", fsl_rio_get_cmdline);
950 static inline void fsl_rio_info(struct device *dev, u32 ccsr)
955 switch (ccsr >> 30) {
966 dev_info(dev, "Hardware port width: %s\n", str);
968 switch ((ccsr >> 27) & 7) {
970 str = "Single-lane 0";
973 str = "Single-lane 2";
982 dev_info(dev, "Training connection status: %s\n", str);
985 if (!(ccsr & 0x80000000))
986 dev_info(dev, "Output port operating in 8-bit mode\n");
987 if (!(ccsr & 0x08000000))
988 dev_info(dev, "Input port operating in 8-bit mode\n");
993 * fsl_rio_setup - Setup Freescale PowerPC RapidIO interface
994 * @dev: of_device pointer
996 * Initializes MPC85xx RapidIO hardware interface, configures
997 * master port with system-specific info, and registers the
998 * master port with the RapidIO subsystem.
1000 int fsl_rio_setup(struct of_device *dev)
1002 struct rio_ops *ops;
1003 struct rio_mport *port;
1004 struct rio_priv *priv;
1006 const u32 *dt_range, *cell;
1007 struct resource regs;
1010 u64 law_start, law_size;
1014 dev_err(&dev->dev, "Device OF-Node is NULL");
1018 rc = of_address_to_resource(dev->node, 0, ®s);
1020 dev_err(&dev->dev, "Can't get %s property 'reg'\n",
1021 dev->node->full_name);
1024 dev_info(&dev->dev, "Of-device full name %s\n", dev->node->full_name);
1025 dev_info(&dev->dev, "Regs start 0x%08x size 0x%08x\n", regs.start,
1026 regs.end - regs.start + 1);
1028 dt_range = of_get_property(dev->node, "ranges", &rlen);
1030 dev_err(&dev->dev, "Can't get %s property 'ranges'\n",
1031 dev->node->full_name);
1035 /* Get node address wide */
1036 cell = of_get_property(dev->node, "#address-cells", NULL);
1040 aw = of_n_addr_cells(dev->node);
1041 /* Get node size wide */
1042 cell = of_get_property(dev->node, "#size-cells", NULL);
1046 sw = of_n_size_cells(dev->node);
1047 /* Get parent address wide wide */
1048 paw = of_n_addr_cells(dev->node);
1050 law_start = of_read_number(dt_range + aw, paw);
1051 law_size = of_read_number(dt_range + aw + paw, sw);
1053 dev_info(&dev->dev, "LAW start 0x%016llx, size 0x%016llx.\n",
1054 law_start, law_size);
1056 ops = kmalloc(sizeof(struct rio_ops), GFP_KERNEL);
1057 ops->lcread = fsl_local_config_read;
1058 ops->lcwrite = fsl_local_config_write;
1059 ops->cread = fsl_rio_config_read;
1060 ops->cwrite = fsl_rio_config_write;
1061 ops->dsend = fsl_rio_doorbell_send;
1063 port = kzalloc(sizeof(struct rio_mport), GFP_KERNEL);
1067 priv = kzalloc(sizeof(struct rio_priv), GFP_KERNEL);
1069 printk(KERN_ERR "Can't alloc memory for 'priv'\n");
1074 INIT_LIST_HEAD(&port->dbells);
1075 port->iores.start = law_start;
1076 port->iores.end = law_start + law_size;
1077 port->iores.flags = IORESOURCE_MEM;
1079 priv->bellirq = irq_of_parse_and_map(dev->node, 2);
1080 priv->txirq = irq_of_parse_and_map(dev->node, 3);
1081 priv->rxirq = irq_of_parse_and_map(dev->node, 4);
1082 dev_info(&dev->dev, "bellirq: %d, txirq: %d, rxirq %d\n", priv->bellirq,
1083 priv->txirq, priv->rxirq);
1085 rio_init_dbell_res(&port->riores[RIO_DOORBELL_RESOURCE], 0, 0xffff);
1086 rio_init_mbox_res(&port->riores[RIO_INB_MBOX_RESOURCE], 0, 0);
1087 rio_init_mbox_res(&port->riores[RIO_OUTB_MBOX_RESOURCE], 0, 0);
1088 strcpy(port->name, "RIO0 mport");
1091 port->host_deviceid = fsl_rio_get_hdid(port->id);
1094 rio_register_mport(port);
1096 priv->regs_win = ioremap(regs.start, regs.end - regs.start + 1);
1098 /* Probe the master port phy type */
1099 ccsr = in_be32(priv->regs_win + RIO_CCSR);
1100 port->phy_type = (ccsr & 1) ? RIO_PHY_SERIAL : RIO_PHY_PARALLEL;
1101 dev_info(&dev->dev, "RapidIO PHY type: %s\n",
1102 (port->phy_type == RIO_PHY_PARALLEL) ? "parallel" :
1103 ((port->phy_type == RIO_PHY_SERIAL) ? "serial" :
1105 /* Checking the port training status */
1106 if (in_be32((priv->regs_win + RIO_ESCSR)) & 1) {
1107 dev_err(&dev->dev, "Port is not ready. "
1108 "Try to restart connection...\n");
1109 switch (port->phy_type) {
1110 case RIO_PHY_SERIAL:
1112 out_be32(priv->regs_win + RIO_CCSR, 0);
1114 setbits32(priv->regs_win + RIO_CCSR, 0x02000000);
1116 setbits32(priv->regs_win + RIO_CCSR, 0x00600000);
1118 case RIO_PHY_PARALLEL:
1120 out_be32(priv->regs_win + RIO_CCSR, 0x22000000);
1122 out_be32(priv->regs_win + RIO_CCSR, 0x44000000);
1126 if (in_be32((priv->regs_win + RIO_ESCSR)) & 1) {
1127 dev_err(&dev->dev, "Port restart failed.\n");
1131 dev_info(&dev->dev, "Port restart success!\n");
1133 fsl_rio_info(&dev->dev, ccsr);
1135 port->sys_size = (in_be32((priv->regs_win + RIO_PEF_CAR))
1136 & RIO_PEF_CTLS) >> 4;
1137 dev_info(&dev->dev, "RapidIO Common Transport System size: %d\n",
1138 port->sys_size ? 65536 : 256);
1140 priv->atmu_regs = (struct rio_atmu_regs *)(priv->regs_win
1141 + RIO_ATMU_REGS_OFFSET);
1142 priv->maint_atmu_regs = priv->atmu_regs + 1;
1143 priv->dbell_atmu_regs = priv->atmu_regs + 2;
1144 priv->msg_regs = (struct rio_msg_regs *)(priv->regs_win +
1145 ((port->phy_type == RIO_PHY_SERIAL) ?
1146 RIO_S_MSG_REGS_OFFSET : RIO_P_MSG_REGS_OFFSET));
1148 /* Set to receive any dist ID for serial RapidIO controller. */
1149 if (port->phy_type == RIO_PHY_SERIAL)
1150 out_be32((priv->regs_win + RIO_ISR_AACR), RIO_ISR_AACR_AA);
1152 /* Configure maintenance transaction window */
1153 out_be32(&priv->maint_atmu_regs->rowbar, 0x000c0000);
1154 out_be32(&priv->maint_atmu_regs->rowar, 0x80077015);
1156 priv->maint_win = ioremap(law_start, RIO_MAINT_WIN_SIZE);
1158 /* Configure outbound doorbell window */
1159 out_be32(&priv->dbell_atmu_regs->rowbar, 0x000c0400);
1160 out_be32(&priv->dbell_atmu_regs->rowar, 0x8004200b);
1161 fsl_rio_doorbell_init(port);
1166 iounmap(priv->regs_win);
1173 /* The probe function for RapidIO peer-to-peer network.
1175 static int __devinit fsl_of_rio_rpn_probe(struct of_device *dev,
1176 const struct of_device_id *match)
1179 printk(KERN_INFO "Setting up RapidIO peer-to-peer network %s\n",
1180 dev->node->full_name);
1182 rc = fsl_rio_setup(dev);
1186 /* Enumerate all registered ports */
1187 rc = rio_init_mports();
1192 static const struct of_device_id fsl_of_rio_rpn_ids[] = {
1194 .compatible = "fsl,rapidio-delta",
1199 static struct of_platform_driver fsl_of_rio_rpn_driver = {
1200 .name = "fsl-of-rio",
1201 .match_table = fsl_of_rio_rpn_ids,
1202 .probe = fsl_of_rio_rpn_probe,
1205 static __init int fsl_of_rio_rpn_init(void)
1207 return of_register_platform_driver(&fsl_of_rio_rpn_driver);
1210 subsys_initcall(fsl_of_rio_rpn_init);