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 * @index: ID of RapidIO interface
180 * @destid: Destination ID of target device
181 * @data: 16-bit info field of RapidIO doorbell message
183 * Sends a MPC85xx doorbell message. Returns %0 on success or
184 * %-EINVAL on failure.
186 static int fsl_rio_doorbell_send(struct rio_mport *mport,
187 int index, u16 destid, u16 data)
189 struct rio_priv *priv = mport->priv;
190 pr_debug("fsl_doorbell_send: index %d destid %4.4x data %4.4x\n",
191 index, destid, data);
192 switch (mport->phy_type) {
193 case RIO_PHY_PARALLEL:
194 out_be32(&priv->dbell_atmu_regs->rowtar, destid << 22);
195 out_be16(priv->dbell_win, data);
198 /* In the serial version silicons, such as MPC8548, MPC8641,
199 * below operations is must be.
201 out_be32(&priv->msg_regs->odmr, 0x00000000);
202 out_be32(&priv->msg_regs->odretcr, 0x00000004);
203 out_be32(&priv->msg_regs->oddpr, destid << 16);
204 out_be32(&priv->msg_regs->oddatr, data);
205 out_be32(&priv->msg_regs->odmr, 0x00000001);
213 * fsl_local_config_read - Generate a MPC85xx local config space read
214 * @index: ID of RapdiIO interface
215 * @offset: Offset into configuration space
216 * @len: Length (in bytes) of the maintenance transaction
217 * @data: Value to be read into
219 * Generates a MPC85xx local configuration space read. Returns %0 on
220 * success or %-EINVAL on failure.
222 static int fsl_local_config_read(struct rio_mport *mport,
223 int index, u32 offset, int len, u32 *data)
225 struct rio_priv *priv = mport->priv;
226 pr_debug("fsl_local_config_read: index %d offset %8.8x\n", index,
228 *data = in_be32(priv->regs_win + offset);
234 * fsl_local_config_write - Generate a MPC85xx local config space write
235 * @index: ID of RapdiIO interface
236 * @offset: Offset into configuration space
237 * @len: Length (in bytes) of the maintenance transaction
238 * @data: Value to be written
240 * Generates a MPC85xx local configuration space write. Returns %0 on
241 * success or %-EINVAL on failure.
243 static int fsl_local_config_write(struct rio_mport *mport,
244 int index, u32 offset, int len, u32 data)
246 struct rio_priv *priv = mport->priv;
248 ("fsl_local_config_write: index %d offset %8.8x data %8.8x\n",
249 index, offset, data);
250 out_be32(priv->regs_win + offset, data);
256 * fsl_rio_config_read - Generate a MPC85xx read maintenance transaction
257 * @index: ID of RapdiIO interface
258 * @destid: Destination ID of transaction
259 * @hopcount: Number of hops to target device
260 * @offset: Offset into configuration space
261 * @len: Length (in bytes) of the maintenance transaction
262 * @val: Location to be read into
264 * Generates a MPC85xx read maintenance transaction. Returns %0 on
265 * success or %-EINVAL on failure.
268 fsl_rio_config_read(struct rio_mport *mport, int index, u16 destid,
269 u8 hopcount, u32 offset, int len, u32 *val)
271 struct rio_priv *priv = mport->priv;
275 ("fsl_rio_config_read: index %d destid %d hopcount %d offset %8.8x len %d\n",
276 index, destid, hopcount, offset, len);
277 out_be32(&priv->maint_atmu_regs->rowtar,
278 (destid << 22) | (hopcount << 12) | ((offset & ~0x3) >> 9));
280 data = (u8 *) priv->maint_win + offset;
283 *val = in_8((u8 *) data);
286 *val = in_be16((u16 *) data);
289 *val = in_be32((u32 *) data);
297 * fsl_rio_config_write - Generate a MPC85xx write maintenance transaction
298 * @index: ID of RapdiIO interface
299 * @destid: Destination ID of transaction
300 * @hopcount: Number of hops to target device
301 * @offset: Offset into configuration space
302 * @len: Length (in bytes) of the maintenance transaction
303 * @val: Value to be written
305 * Generates an MPC85xx write maintenance transaction. Returns %0 on
306 * success or %-EINVAL on failure.
309 fsl_rio_config_write(struct rio_mport *mport, int index, u16 destid,
310 u8 hopcount, u32 offset, int len, u32 val)
312 struct rio_priv *priv = mport->priv;
315 ("fsl_rio_config_write: index %d destid %d hopcount %d offset %8.8x len %d val %8.8x\n",
316 index, destid, hopcount, offset, len, val);
317 out_be32(&priv->maint_atmu_regs->rowtar,
318 (destid << 22) | (hopcount << 12) | ((offset & ~0x3) >> 9));
320 data = (u8 *) priv->maint_win + offset;
323 out_8((u8 *) data, val);
326 out_be16((u16 *) data, val);
329 out_be32((u32 *) data, val);
337 * rio_hw_add_outb_message - Add message to the MPC85xx outbound message queue
338 * @mport: Master port with outbound message queue
339 * @rdev: Target of outbound message
340 * @mbox: Outbound mailbox
341 * @buffer: Message to add to outbound queue
342 * @len: Length of message
344 * Adds the @buffer message to the MPC85xx outbound message queue. Returns
345 * %0 on success or %-EINVAL on failure.
348 rio_hw_add_outb_message(struct rio_mport *mport, struct rio_dev *rdev, int mbox,
349 void *buffer, size_t len)
351 struct rio_priv *priv = mport->priv;
353 struct rio_tx_desc *desc = (struct rio_tx_desc *)priv->msg_tx_ring.virt
354 + priv->msg_tx_ring.tx_slot;
358 ("RIO: rio_hw_add_outb_message(): destid %4.4x mbox %d buffer %8.8x len %8.8x\n",
359 rdev->destid, mbox, (int)buffer, len);
361 if ((len < 8) || (len > RIO_MAX_MSG_SIZE)) {
366 /* Copy and clear rest of buffer */
367 memcpy(priv->msg_tx_ring.virt_buffer[priv->msg_tx_ring.tx_slot], buffer,
369 if (len < (RIO_MAX_MSG_SIZE - 4))
370 memset(priv->msg_tx_ring.virt_buffer[priv->msg_tx_ring.tx_slot]
371 + len, 0, RIO_MAX_MSG_SIZE - len);
373 switch (mport->phy_type) {
374 case RIO_PHY_PARALLEL:
375 /* Set mbox field for message */
376 desc->dport = mbox & 0x3;
378 /* Enable EOMI interrupt, set priority, and set destid */
379 desc->dattr = 0x28000000 | (rdev->destid << 2);
382 /* Set mbox field for message, and set destid */
383 desc->dport = (rdev->destid << 16) | (mbox & 0x3);
385 /* Enable EOMI interrupt and priority */
386 desc->dattr = 0x28000000;
390 /* Set transfer size aligned to next power of 2 (in double words) */
391 desc->dwcnt = is_power_of_2(len) ? len : 1 << get_bitmask_order(len);
393 /* Set snooping and source buffer address */
394 desc->saddr = 0x00000004
395 | priv->msg_tx_ring.phys_buffer[priv->msg_tx_ring.tx_slot];
397 /* Increment enqueue pointer */
398 omr = in_be32(&priv->msg_regs->omr);
399 out_be32(&priv->msg_regs->omr, omr | RIO_MSG_OMR_MUI);
401 /* Go to next descriptor */
402 if (++priv->msg_tx_ring.tx_slot == priv->msg_tx_ring.size)
403 priv->msg_tx_ring.tx_slot = 0;
409 EXPORT_SYMBOL_GPL(rio_hw_add_outb_message);
412 * fsl_rio_tx_handler - MPC85xx outbound message interrupt handler
413 * @irq: Linux interrupt number
414 * @dev_instance: Pointer to interrupt-specific data
416 * Handles outbound message interrupts. Executes a register outbound
417 * mailbox event handler and acks the interrupt occurrence.
420 fsl_rio_tx_handler(int irq, void *dev_instance)
423 struct rio_mport *port = (struct rio_mport *)dev_instance;
424 struct rio_priv *priv = port->priv;
426 osr = in_be32(&priv->msg_regs->osr);
428 if (osr & RIO_MSG_OSR_TE) {
429 pr_info("RIO: outbound message transmission error\n");
430 out_be32(&priv->msg_regs->osr, RIO_MSG_OSR_TE);
434 if (osr & RIO_MSG_OSR_QOI) {
435 pr_info("RIO: outbound message queue overflow\n");
436 out_be32(&priv->msg_regs->osr, RIO_MSG_OSR_QOI);
440 if (osr & RIO_MSG_OSR_EOMI) {
441 u32 dqp = in_be32(&priv->msg_regs->odqdpar);
442 int slot = (dqp - priv->msg_tx_ring.phys) >> 5;
443 port->outb_msg[0].mcback(port, priv->msg_tx_ring.dev_id, -1,
446 /* Ack the end-of-message interrupt */
447 out_be32(&priv->msg_regs->osr, RIO_MSG_OSR_EOMI);
455 * rio_open_outb_mbox - Initialize MPC85xx outbound mailbox
456 * @mport: Master port implementing the outbound message unit
457 * @dev_id: Device specific pointer to pass on event
458 * @mbox: Mailbox to open
459 * @entries: Number of entries in the outbound mailbox ring
461 * Initializes buffer ring, request the outbound message interrupt,
462 * and enables the outbound message unit. Returns %0 on success and
463 * %-EINVAL or %-ENOMEM on failure.
465 int rio_open_outb_mbox(struct rio_mport *mport, void *dev_id, int mbox, int entries)
468 struct rio_priv *priv = mport->priv;
470 if ((entries < RIO_MIN_TX_RING_SIZE) ||
471 (entries > RIO_MAX_TX_RING_SIZE) || (!is_power_of_2(entries))) {
476 /* Initialize shadow copy ring */
477 priv->msg_tx_ring.dev_id = dev_id;
478 priv->msg_tx_ring.size = entries;
480 for (i = 0; i < priv->msg_tx_ring.size; i++) {
481 priv->msg_tx_ring.virt_buffer[i] =
482 dma_alloc_coherent(NULL, RIO_MSG_BUFFER_SIZE,
483 &priv->msg_tx_ring.phys_buffer[i], GFP_KERNEL);
484 if (!priv->msg_tx_ring.virt_buffer[i]) {
486 for (j = 0; j < priv->msg_tx_ring.size; j++)
487 if (priv->msg_tx_ring.virt_buffer[j])
488 dma_free_coherent(NULL,
498 /* Initialize outbound message descriptor ring */
499 priv->msg_tx_ring.virt = dma_alloc_coherent(NULL,
500 priv->msg_tx_ring.size * RIO_MSG_DESC_SIZE,
501 &priv->msg_tx_ring.phys, GFP_KERNEL);
502 if (!priv->msg_tx_ring.virt) {
506 memset(priv->msg_tx_ring.virt, 0,
507 priv->msg_tx_ring.size * RIO_MSG_DESC_SIZE);
508 priv->msg_tx_ring.tx_slot = 0;
510 /* Point dequeue/enqueue pointers at first entry in ring */
511 out_be32(&priv->msg_regs->odqdpar, priv->msg_tx_ring.phys);
512 out_be32(&priv->msg_regs->odqepar, priv->msg_tx_ring.phys);
514 /* Configure for snooping */
515 out_be32(&priv->msg_regs->osar, 0x00000004);
517 /* Clear interrupt status */
518 out_be32(&priv->msg_regs->osr, 0x000000b3);
520 /* Hook up outbound message handler */
521 rc = request_irq(IRQ_RIO_TX(mport), fsl_rio_tx_handler, 0,
522 "msg_tx", (void *)mport);
527 * Configure outbound message unit
529 * Interrupts (all enabled, except QEIE)
533 out_be32(&priv->msg_regs->omr, 0x00100220);
535 /* Set number of entries */
536 out_be32(&priv->msg_regs->omr,
537 in_be32(&priv->msg_regs->omr) |
538 ((get_bitmask_order(entries) - 2) << 12));
540 /* Now enable the unit */
541 out_be32(&priv->msg_regs->omr, in_be32(&priv->msg_regs->omr) | 0x1);
547 dma_free_coherent(NULL, priv->msg_tx_ring.size * RIO_MSG_DESC_SIZE,
548 priv->msg_tx_ring.virt, priv->msg_tx_ring.phys);
551 for (i = 0; i < priv->msg_tx_ring.size; i++)
552 dma_free_coherent(NULL, RIO_MSG_BUFFER_SIZE,
553 priv->msg_tx_ring.virt_buffer[i],
554 priv->msg_tx_ring.phys_buffer[i]);
560 * rio_close_outb_mbox - Shut down MPC85xx outbound mailbox
561 * @mport: Master port implementing the outbound message unit
562 * @mbox: Mailbox to close
564 * Disables the outbound message unit, free all buffers, and
565 * frees the outbound message interrupt.
567 void rio_close_outb_mbox(struct rio_mport *mport, int mbox)
569 struct rio_priv *priv = mport->priv;
570 /* Disable inbound message unit */
571 out_be32(&priv->msg_regs->omr, 0);
574 dma_free_coherent(NULL, priv->msg_tx_ring.size * RIO_MSG_DESC_SIZE,
575 priv->msg_tx_ring.virt, priv->msg_tx_ring.phys);
578 free_irq(IRQ_RIO_TX(mport), (void *)mport);
582 * fsl_rio_rx_handler - MPC85xx inbound message interrupt handler
583 * @irq: Linux interrupt number
584 * @dev_instance: Pointer to interrupt-specific data
586 * Handles inbound message interrupts. Executes a registered inbound
587 * mailbox event handler and acks the interrupt occurrence.
590 fsl_rio_rx_handler(int irq, void *dev_instance)
593 struct rio_mport *port = (struct rio_mport *)dev_instance;
594 struct rio_priv *priv = port->priv;
596 isr = in_be32(&priv->msg_regs->isr);
598 if (isr & RIO_MSG_ISR_TE) {
599 pr_info("RIO: inbound message reception error\n");
600 out_be32((void *)&priv->msg_regs->isr, RIO_MSG_ISR_TE);
604 /* XXX Need to check/dispatch until queue empty */
605 if (isr & RIO_MSG_ISR_DIQI) {
607 * We implement *only* mailbox 0, but can receive messages
608 * for any mailbox/letter to that mailbox destination. So,
609 * make the callback with an unknown/invalid mailbox number
612 port->inb_msg[0].mcback(port, priv->msg_rx_ring.dev_id, -1, -1);
614 /* Ack the queueing interrupt */
615 out_be32(&priv->msg_regs->isr, RIO_MSG_ISR_DIQI);
623 * rio_open_inb_mbox - Initialize MPC85xx inbound mailbox
624 * @mport: Master port implementing the inbound message unit
625 * @dev_id: Device specific pointer to pass on event
626 * @mbox: Mailbox to open
627 * @entries: Number of entries in the inbound mailbox ring
629 * Initializes buffer ring, request the inbound message interrupt,
630 * and enables the inbound message unit. Returns %0 on success
631 * and %-EINVAL or %-ENOMEM on failure.
633 int rio_open_inb_mbox(struct rio_mport *mport, void *dev_id, int mbox, int entries)
636 struct rio_priv *priv = mport->priv;
638 if ((entries < RIO_MIN_RX_RING_SIZE) ||
639 (entries > RIO_MAX_RX_RING_SIZE) || (!is_power_of_2(entries))) {
644 /* Initialize client buffer ring */
645 priv->msg_rx_ring.dev_id = dev_id;
646 priv->msg_rx_ring.size = entries;
647 priv->msg_rx_ring.rx_slot = 0;
648 for (i = 0; i < priv->msg_rx_ring.size; i++)
649 priv->msg_rx_ring.virt_buffer[i] = NULL;
651 /* Initialize inbound message ring */
652 priv->msg_rx_ring.virt = dma_alloc_coherent(NULL,
653 priv->msg_rx_ring.size * RIO_MAX_MSG_SIZE,
654 &priv->msg_rx_ring.phys, GFP_KERNEL);
655 if (!priv->msg_rx_ring.virt) {
660 /* Point dequeue/enqueue pointers at first entry in ring */
661 out_be32(&priv->msg_regs->ifqdpar, (u32) priv->msg_rx_ring.phys);
662 out_be32(&priv->msg_regs->ifqepar, (u32) priv->msg_rx_ring.phys);
664 /* Clear interrupt status */
665 out_be32(&priv->msg_regs->isr, 0x00000091);
667 /* Hook up inbound message handler */
668 rc = request_irq(IRQ_RIO_RX(mport), fsl_rio_rx_handler, 0,
669 "msg_rx", (void *)mport);
671 dma_free_coherent(NULL, RIO_MSG_BUFFER_SIZE,
672 priv->msg_tx_ring.virt_buffer[i],
673 priv->msg_tx_ring.phys_buffer[i]);
678 * Configure inbound message unit:
680 * 4KB max message size
681 * Unmask all interrupt sources
684 out_be32(&priv->msg_regs->imr, 0x001b0060);
686 /* Set number of queue entries */
687 setbits32(&priv->msg_regs->imr, (get_bitmask_order(entries) - 2) << 12);
689 /* Now enable the unit */
690 setbits32(&priv->msg_regs->imr, 0x1);
697 * rio_close_inb_mbox - Shut down MPC85xx inbound mailbox
698 * @mport: Master port implementing the inbound message unit
699 * @mbox: Mailbox to close
701 * Disables the inbound message unit, free all buffers, and
702 * frees the inbound message interrupt.
704 void rio_close_inb_mbox(struct rio_mport *mport, int mbox)
706 struct rio_priv *priv = mport->priv;
707 /* Disable inbound message unit */
708 out_be32(&priv->msg_regs->imr, 0);
711 dma_free_coherent(NULL, priv->msg_rx_ring.size * RIO_MAX_MSG_SIZE,
712 priv->msg_rx_ring.virt, priv->msg_rx_ring.phys);
715 free_irq(IRQ_RIO_RX(mport), (void *)mport);
719 * rio_hw_add_inb_buffer - Add buffer to the MPC85xx inbound message queue
720 * @mport: Master port implementing the inbound message unit
721 * @mbox: Inbound mailbox number
722 * @buf: Buffer to add to inbound queue
724 * Adds the @buf buffer to the MPC85xx inbound message queue. Returns
725 * %0 on success or %-EINVAL on failure.
727 int rio_hw_add_inb_buffer(struct rio_mport *mport, int mbox, void *buf)
730 struct rio_priv *priv = mport->priv;
732 pr_debug("RIO: rio_hw_add_inb_buffer(), msg_rx_ring.rx_slot %d\n",
733 priv->msg_rx_ring.rx_slot);
735 if (priv->msg_rx_ring.virt_buffer[priv->msg_rx_ring.rx_slot]) {
737 "RIO: error adding inbound buffer %d, buffer exists\n",
738 priv->msg_rx_ring.rx_slot);
743 priv->msg_rx_ring.virt_buffer[priv->msg_rx_ring.rx_slot] = buf;
744 if (++priv->msg_rx_ring.rx_slot == priv->msg_rx_ring.size)
745 priv->msg_rx_ring.rx_slot = 0;
751 EXPORT_SYMBOL_GPL(rio_hw_add_inb_buffer);
754 * rio_hw_get_inb_message - Fetch inbound message from the MPC85xx message unit
755 * @mport: Master port implementing the inbound message unit
756 * @mbox: Inbound mailbox number
758 * Gets the next available inbound message from the inbound message queue.
759 * A pointer to the message is returned on success or NULL on failure.
761 void *rio_hw_get_inb_message(struct rio_mport *mport, int mbox)
763 struct rio_priv *priv = mport->priv;
764 u32 phys_buf, virt_buf;
768 phys_buf = in_be32(&priv->msg_regs->ifqdpar);
770 /* If no more messages, then bail out */
771 if (phys_buf == in_be32(&priv->msg_regs->ifqepar))
774 virt_buf = (u32) priv->msg_rx_ring.virt + (phys_buf
775 - priv->msg_rx_ring.phys);
776 buf_idx = (phys_buf - priv->msg_rx_ring.phys) / RIO_MAX_MSG_SIZE;
777 buf = priv->msg_rx_ring.virt_buffer[buf_idx];
781 "RIO: inbound message copy failed, no buffers\n");
785 /* Copy max message size, caller is expected to allocate that big */
786 memcpy(buf, (void *)virt_buf, RIO_MAX_MSG_SIZE);
788 /* Clear the available buffer */
789 priv->msg_rx_ring.virt_buffer[buf_idx] = NULL;
792 setbits32(&priv->msg_regs->imr, RIO_MSG_IMR_MI);
798 EXPORT_SYMBOL_GPL(rio_hw_get_inb_message);
801 * fsl_rio_dbell_handler - MPC85xx doorbell interrupt handler
802 * @irq: Linux interrupt number
803 * @dev_instance: Pointer to interrupt-specific data
805 * Handles doorbell interrupts. Parses a list of registered
806 * doorbell event handlers and executes a matching event handler.
809 fsl_rio_dbell_handler(int irq, void *dev_instance)
812 struct rio_mport *port = (struct rio_mport *)dev_instance;
813 struct rio_priv *priv = port->priv;
815 dsr = in_be32(&priv->msg_regs->dsr);
817 if (dsr & DOORBELL_DSR_TE) {
818 pr_info("RIO: doorbell reception error\n");
819 out_be32(&priv->msg_regs->dsr, DOORBELL_DSR_TE);
823 if (dsr & DOORBELL_DSR_QFI) {
824 pr_info("RIO: doorbell queue full\n");
825 out_be32(&priv->msg_regs->dsr, DOORBELL_DSR_QFI);
829 /* XXX Need to check/dispatch until queue empty */
830 if (dsr & DOORBELL_DSR_DIQI) {
832 (u32) priv->dbell_ring.virt +
833 (in_be32(&priv->msg_regs->dqdpar) & 0xfff);
834 struct rio_dbell *dbell;
838 ("RIO: processing doorbell, sid %2.2x tid %2.2x info %4.4x\n",
839 DBELL_SID(dmsg), DBELL_TID(dmsg), DBELL_INF(dmsg));
841 list_for_each_entry(dbell, &port->dbells, node) {
842 if ((dbell->res->start <= DBELL_INF(dmsg)) &&
843 (dbell->res->end >= DBELL_INF(dmsg))) {
849 dbell->dinb(port, dbell->dev_id, DBELL_SID(dmsg), DBELL_TID(dmsg),
853 ("RIO: spurious doorbell, sid %2.2x tid %2.2x info %4.4x\n",
854 DBELL_SID(dmsg), DBELL_TID(dmsg), DBELL_INF(dmsg));
856 setbits32(&priv->msg_regs->dmr, DOORBELL_DMR_DI);
857 out_be32(&priv->msg_regs->dsr, DOORBELL_DSR_DIQI);
865 * fsl_rio_doorbell_init - MPC85xx doorbell interface init
866 * @mport: Master port implementing the inbound doorbell unit
868 * Initializes doorbell unit hardware and inbound DMA buffer
869 * ring. Called from fsl_rio_setup(). Returns %0 on success
870 * or %-ENOMEM on failure.
872 static int fsl_rio_doorbell_init(struct rio_mport *mport)
874 struct rio_priv *priv = mport->priv;
877 /* Map outbound doorbell window immediately after maintenance window */
878 priv->dbell_win = ioremap(mport->iores.start + RIO_MAINT_WIN_SIZE,
880 if (!priv->dbell_win) {
882 "RIO: unable to map outbound doorbell window\n");
887 /* Initialize inbound doorbells */
888 priv->dbell_ring.virt = dma_alloc_coherent(NULL, 512 *
889 DOORBELL_MESSAGE_SIZE, &priv->dbell_ring.phys, GFP_KERNEL);
890 if (!priv->dbell_ring.virt) {
891 printk(KERN_ERR "RIO: unable allocate inbound doorbell ring\n");
893 iounmap(priv->dbell_win);
897 /* Point dequeue/enqueue pointers at first entry in ring */
898 out_be32(&priv->msg_regs->dqdpar, (u32) priv->dbell_ring.phys);
899 out_be32(&priv->msg_regs->dqepar, (u32) priv->dbell_ring.phys);
901 /* Clear interrupt status */
902 out_be32(&priv->msg_regs->dsr, 0x00000091);
904 /* Hook up doorbell handler */
905 rc = request_irq(IRQ_RIO_BELL(mport), fsl_rio_dbell_handler, 0,
906 "dbell_rx", (void *)mport);
908 iounmap(priv->dbell_win);
909 dma_free_coherent(NULL, 512 * DOORBELL_MESSAGE_SIZE,
910 priv->dbell_ring.virt, priv->dbell_ring.phys);
912 "MPC85xx RIO: unable to request inbound doorbell irq");
916 /* Configure doorbells for snooping, 512 entries, and enable */
917 out_be32(&priv->msg_regs->dmr, 0x00108161);
923 static char *cmdline = NULL;
925 static int fsl_rio_get_hdid(int index)
927 /* XXX Need to parse multiple entries in some format */
931 return simple_strtol(cmdline, NULL, 0);
934 static int fsl_rio_get_cmdline(char *s)
943 __setup("riohdid=", fsl_rio_get_cmdline);
945 static inline void fsl_rio_info(struct device *dev, u32 ccsr)
950 switch (ccsr >> 30) {
961 dev_info(dev, "Hardware port width: %s\n", str);
963 switch ((ccsr >> 27) & 7) {
965 str = "Single-lane 0";
968 str = "Single-lane 2";
977 dev_info(dev, "Training connection status: %s\n", str);
980 if (!(ccsr & 0x80000000))
981 dev_info(dev, "Output port operating in 8-bit mode\n");
982 if (!(ccsr & 0x08000000))
983 dev_info(dev, "Input port operating in 8-bit mode\n");
988 * fsl_rio_setup - Setup MPC85xx RapidIO interface
989 * @fsl_rio_setup - Setup Freescale PowerPC RapidIO interface
991 * Initializes MPC85xx RapidIO hardware interface, configures
992 * master port with system-specific info, and registers the
993 * master port with the RapidIO subsystem.
995 int fsl_rio_setup(struct of_device *dev)
998 struct rio_mport *port;
999 struct rio_priv *priv;
1001 const u32 *dt_range, *cell;
1002 struct resource regs;
1005 u64 law_start, law_size;
1009 dev_err(&dev->dev, "Device OF-Node is NULL");
1013 rc = of_address_to_resource(dev->node, 0, ®s);
1015 dev_err(&dev->dev, "Can't get %s property 'reg'\n",
1016 dev->node->full_name);
1019 dev_info(&dev->dev, "Of-device full name %s\n", dev->node->full_name);
1020 dev_info(&dev->dev, "Regs start 0x%08x size 0x%08x\n", regs.start,
1021 regs.end - regs.start + 1);
1023 dt_range = of_get_property(dev->node, "ranges", &rlen);
1025 dev_err(&dev->dev, "Can't get %s property 'ranges'\n",
1026 dev->node->full_name);
1030 /* Get node address wide */
1031 cell = of_get_property(dev->node, "#address-cells", NULL);
1035 aw = of_n_addr_cells(dev->node);
1036 /* Get node size wide */
1037 cell = of_get_property(dev->node, "#size-cells", NULL);
1041 sw = of_n_size_cells(dev->node);
1042 /* Get parent address wide wide */
1043 paw = of_n_addr_cells(dev->node);
1045 law_start = of_read_number(dt_range + aw, paw);
1046 law_size = of_read_number(dt_range + aw + paw, sw);
1048 dev_info(&dev->dev, "LAW start 0x%016llx, size 0x%016llx.\n",
1049 law_start, law_size);
1051 ops = kmalloc(sizeof(struct rio_ops), GFP_KERNEL);
1052 ops->lcread = fsl_local_config_read;
1053 ops->lcwrite = fsl_local_config_write;
1054 ops->cread = fsl_rio_config_read;
1055 ops->cwrite = fsl_rio_config_write;
1056 ops->dsend = fsl_rio_doorbell_send;
1058 port = kzalloc(sizeof(struct rio_mport), GFP_KERNEL);
1062 priv = kzalloc(sizeof(struct rio_priv), GFP_KERNEL);
1064 printk(KERN_ERR "Can't alloc memory for 'priv'\n");
1069 INIT_LIST_HEAD(&port->dbells);
1070 port->iores.start = law_start;
1071 port->iores.end = law_start + law_size;
1072 port->iores.flags = IORESOURCE_MEM;
1074 priv->bellirq = irq_of_parse_and_map(dev->node, 2);
1075 priv->txirq = irq_of_parse_and_map(dev->node, 3);
1076 priv->rxirq = irq_of_parse_and_map(dev->node, 4);
1077 dev_info(&dev->dev, "bellirq: %d, txirq: %d, rxirq %d\n", priv->bellirq,
1078 priv->txirq, priv->rxirq);
1080 rio_init_dbell_res(&port->riores[RIO_DOORBELL_RESOURCE], 0, 0xffff);
1081 rio_init_mbox_res(&port->riores[RIO_INB_MBOX_RESOURCE], 0, 0);
1082 rio_init_mbox_res(&port->riores[RIO_OUTB_MBOX_RESOURCE], 0, 0);
1083 strcpy(port->name, "RIO0 mport");
1086 port->host_deviceid = fsl_rio_get_hdid(port->id);
1089 rio_register_mport(port);
1091 priv->regs_win = ioremap(regs.start, regs.end - regs.start + 1);
1093 /* Probe the master port phy type */
1094 ccsr = in_be32(priv->regs_win + RIO_CCSR);
1095 port->phy_type = (ccsr & 1) ? RIO_PHY_SERIAL : RIO_PHY_PARALLEL;
1096 dev_info(&dev->dev, "RapidIO PHY type: %s\n",
1097 (port->phy_type == RIO_PHY_PARALLEL) ? "parallel" :
1098 ((port->phy_type == RIO_PHY_SERIAL) ? "serial" :
1100 /* Checking the port training status */
1101 if (in_be32((priv->regs_win + RIO_ESCSR)) & 1) {
1102 dev_err(&dev->dev, "Port is not ready. "
1103 "Try to restart connection...\n");
1104 switch (port->phy_type) {
1105 case RIO_PHY_SERIAL:
1107 out_be32(priv->regs_win + RIO_CCSR, 0);
1109 setbits32(priv->regs_win + RIO_CCSR, 0x02000000);
1111 setbits32(priv->regs_win + RIO_CCSR, 0x00600000);
1113 case RIO_PHY_PARALLEL:
1115 out_be32(priv->regs_win + RIO_CCSR, 0x22000000);
1117 out_be32(priv->regs_win + RIO_CCSR, 0x44000000);
1121 if (in_be32((priv->regs_win + RIO_ESCSR)) & 1) {
1122 dev_err(&dev->dev, "Port restart failed.\n");
1126 dev_info(&dev->dev, "Port restart success!\n");
1128 fsl_rio_info(&dev->dev, ccsr);
1130 port->sys_size = (in_be32((priv->regs_win + RIO_PEF_CAR))
1131 & RIO_PEF_CTLS) >> 4;
1132 dev_info(&dev->dev, "RapidIO Common Transport System size: %d\n",
1133 port->sys_size ? 65536 : 256);
1135 priv->atmu_regs = (struct rio_atmu_regs *)(priv->regs_win
1136 + RIO_ATMU_REGS_OFFSET);
1137 priv->maint_atmu_regs = priv->atmu_regs + 1;
1138 priv->dbell_atmu_regs = priv->atmu_regs + 2;
1139 priv->msg_regs = (struct rio_msg_regs *)(priv->regs_win +
1140 ((port->phy_type == RIO_PHY_SERIAL) ?
1141 RIO_S_MSG_REGS_OFFSET : RIO_P_MSG_REGS_OFFSET));
1143 /* Set to receive any dist ID for serial RapidIO controller. */
1144 if (port->phy_type == RIO_PHY_SERIAL)
1145 out_be32((priv->regs_win + RIO_ISR_AACR), RIO_ISR_AACR_AA);
1147 /* Configure maintenance transaction window */
1148 out_be32(&priv->maint_atmu_regs->rowbar, 0x000c0000);
1149 out_be32(&priv->maint_atmu_regs->rowar, 0x80077015);
1151 priv->maint_win = ioremap(law_start, RIO_MAINT_WIN_SIZE);
1153 /* Configure outbound doorbell window */
1154 out_be32(&priv->dbell_atmu_regs->rowbar, 0x000c0400);
1155 out_be32(&priv->dbell_atmu_regs->rowar, 0x8004200b);
1156 fsl_rio_doorbell_init(port);
1161 iounmap(priv->regs_win);
1168 /* The probe function for RapidIO peer-to-peer network.
1170 static int __devinit fsl_of_rio_rpn_probe(struct of_device *dev,
1171 const struct of_device_id *match)
1174 printk(KERN_INFO "Setting up RapidIO peer-to-peer network %s\n",
1175 dev->node->full_name);
1177 rc = fsl_rio_setup(dev);
1181 /* Enumerate all registered ports */
1182 rc = rio_init_mports();
1187 static const struct of_device_id fsl_of_rio_rpn_ids[] = {
1189 .compatible = "fsl,rapidio-delta",
1194 static struct of_platform_driver fsl_of_rio_rpn_driver = {
1195 .name = "fsl-of-rio",
1196 .match_table = fsl_of_rio_rpn_ids,
1197 .probe = fsl_of_rio_rpn_probe,
1200 static __init int fsl_of_rio_rpn_init(void)
1202 return of_register_platform_driver(&fsl_of_rio_rpn_driver);
1205 subsys_initcall(fsl_of_rio_rpn_init);