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Matt Porter2b0c28d7f2005-11-07 01:00:19 -08001/*
Zhang Weid02443a2008-04-18 13:33:38 -07002 * Freescale MPC85xx/MPC86xx RapidIO support
Matt Porter2b0c28d7f2005-11-07 01:00:19 -08003 *
Zhang Weiad1e9382008-04-18 13:33:41 -07004 * Copyright (C) 2007, 2008 Freescale Semiconductor, Inc.
5 * Zhang Wei <wei.zhang@freescale.com>
6 *
Matt Porter2b0c28d7f2005-11-07 01:00:19 -08007 * Copyright 2005 MontaVista Software, Inc.
8 * Matt Porter <mporter@kernel.crashing.org>
9 *
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.
14 */
15
Matt Porter2b0c28d7f2005-11-07 01:00:19 -080016#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>
Anton Vorontsov0dbbbf12009-04-18 21:48:52 +040021#include <linux/device.h>
Matt Porter2b0c28d7f2005-11-07 01:00:19 -080022#include <linux/rio.h>
23#include <linux/rio_drv.h>
Zhang Weicc2bb692008-04-18 13:33:41 -070024#include <linux/of_platform.h>
Zhang Wei61b26912008-04-18 13:33:44 -070025#include <linux/delay.h>
Matt Porter2b0c28d7f2005-11-07 01:00:19 -080026
27#include <asm/io.h>
28
Zhang Weiad1e9382008-04-18 13:33:41 -070029/* RapidIO definition irq, which read from OF-tree */
30#define IRQ_RIO_BELL(m) (((struct rio_priv *)(m->priv))->bellirq)
31#define IRQ_RIO_TX(m) (((struct rio_priv *)(m->priv))->txirq)
32#define IRQ_RIO_RX(m) (((struct rio_priv *)(m->priv))->rxirq)
33
Matt Porter2b0c28d7f2005-11-07 01:00:19 -080034#define RIO_ATMU_REGS_OFFSET 0x10c00
Zhang Wei61b26912008-04-18 13:33:44 -070035#define RIO_P_MSG_REGS_OFFSET 0x11000
36#define RIO_S_MSG_REGS_OFFSET 0x13000
37#define RIO_ESCSR 0x158
38#define RIO_CCSR 0x15c
39#define RIO_ISR_AACR 0x10120
40#define RIO_ISR_AACR_AA 0x1 /* Accept All ID */
Matt Porter2b0c28d7f2005-11-07 01:00:19 -080041#define RIO_MAINT_WIN_SIZE 0x400000
42#define RIO_DBELL_WIN_SIZE 0x1000
43
44#define RIO_MSG_OMR_MUI 0x00000002
45#define RIO_MSG_OSR_TE 0x00000080
46#define RIO_MSG_OSR_QOI 0x00000020
47#define RIO_MSG_OSR_QFI 0x00000010
48#define RIO_MSG_OSR_MUB 0x00000004
49#define RIO_MSG_OSR_EOMI 0x00000002
50#define RIO_MSG_OSR_QEI 0x00000001
51
52#define RIO_MSG_IMR_MI 0x00000002
53#define RIO_MSG_ISR_TE 0x00000080
54#define RIO_MSG_ISR_QFI 0x00000010
55#define RIO_MSG_ISR_DIQI 0x00000001
56
57#define RIO_MSG_DESC_SIZE 32
58#define RIO_MSG_BUFFER_SIZE 4096
59#define RIO_MIN_TX_RING_SIZE 2
60#define RIO_MAX_TX_RING_SIZE 2048
61#define RIO_MIN_RX_RING_SIZE 2
62#define RIO_MAX_RX_RING_SIZE 2048
63
64#define DOORBELL_DMR_DI 0x00000002
65#define DOORBELL_DSR_TE 0x00000080
66#define DOORBELL_DSR_QFI 0x00000010
67#define DOORBELL_DSR_DIQI 0x00000001
Zhang Wei6c391032008-04-18 13:33:48 -070068#define DOORBELL_TID_OFFSET 0x02
69#define DOORBELL_SID_OFFSET 0x04
Matt Porter2b0c28d7f2005-11-07 01:00:19 -080070#define DOORBELL_INFO_OFFSET 0x06
71
72#define DOORBELL_MESSAGE_SIZE 0x08
Zhang Wei6c391032008-04-18 13:33:48 -070073#define DBELL_SID(x) (*(u16 *)(x + DOORBELL_SID_OFFSET))
74#define DBELL_TID(x) (*(u16 *)(x + DOORBELL_TID_OFFSET))
Matt Porter2b0c28d7f2005-11-07 01:00:19 -080075#define DBELL_INF(x) (*(u16 *)(x + DOORBELL_INFO_OFFSET))
76
Matt Porter2b0c28d7f2005-11-07 01:00:19 -080077struct rio_atmu_regs {
78 u32 rowtar;
Zhang Wei61b26912008-04-18 13:33:44 -070079 u32 rowtear;
Matt Porter2b0c28d7f2005-11-07 01:00:19 -080080 u32 rowbar;
81 u32 pad2;
82 u32 rowar;
83 u32 pad3[3];
84};
85
86struct rio_msg_regs {
87 u32 omr;
88 u32 osr;
89 u32 pad1;
90 u32 odqdpar;
91 u32 pad2;
92 u32 osar;
93 u32 odpr;
94 u32 odatr;
95 u32 odcr;
96 u32 pad3;
97 u32 odqepar;
98 u32 pad4[13];
99 u32 imr;
100 u32 isr;
101 u32 pad5;
102 u32 ifqdpar;
103 u32 pad6;
104 u32 ifqepar;
Zhang Wei61b26912008-04-18 13:33:44 -0700105 u32 pad7[226];
106 u32 odmr;
107 u32 odsr;
108 u32 res0[4];
109 u32 oddpr;
110 u32 oddatr;
111 u32 res1[3];
112 u32 odretcr;
113 u32 res2[12];
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800114 u32 dmr;
115 u32 dsr;
116 u32 pad8;
117 u32 dqdpar;
118 u32 pad9;
119 u32 dqepar;
120 u32 pad10[26];
121 u32 pwmr;
122 u32 pwsr;
123 u32 pad11;
124 u32 pwqbar;
125};
126
127struct rio_tx_desc {
128 u32 res1;
129 u32 saddr;
130 u32 dport;
131 u32 dattr;
132 u32 res2;
133 u32 res3;
134 u32 dwcnt;
135 u32 res4;
136};
137
Zhang Weiad1e9382008-04-18 13:33:41 -0700138struct rio_dbell_ring {
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800139 void *virt;
140 dma_addr_t phys;
Zhang Weiad1e9382008-04-18 13:33:41 -0700141};
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800142
Zhang Weiad1e9382008-04-18 13:33:41 -0700143struct rio_msg_tx_ring {
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800144 void *virt;
145 dma_addr_t phys;
146 void *virt_buffer[RIO_MAX_TX_RING_SIZE];
147 dma_addr_t phys_buffer[RIO_MAX_TX_RING_SIZE];
148 int tx_slot;
149 int size;
Matt Porter6978bbc2005-11-07 01:00:20 -0800150 void *dev_id;
Zhang Weiad1e9382008-04-18 13:33:41 -0700151};
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800152
Zhang Weiad1e9382008-04-18 13:33:41 -0700153struct rio_msg_rx_ring {
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800154 void *virt;
155 dma_addr_t phys;
156 void *virt_buffer[RIO_MAX_RX_RING_SIZE];
157 int rx_slot;
158 int size;
Matt Porter6978bbc2005-11-07 01:00:20 -0800159 void *dev_id;
Zhang Weiad1e9382008-04-18 13:33:41 -0700160};
161
162struct rio_priv {
Anton Vorontsov0dbbbf12009-04-18 21:48:52 +0400163 struct device *dev;
Zhang Weiad1e9382008-04-18 13:33:41 -0700164 void __iomem *regs_win;
165 struct rio_atmu_regs __iomem *atmu_regs;
166 struct rio_atmu_regs __iomem *maint_atmu_regs;
167 struct rio_atmu_regs __iomem *dbell_atmu_regs;
168 void __iomem *dbell_win;
169 void __iomem *maint_win;
170 struct rio_msg_regs __iomem *msg_regs;
171 struct rio_dbell_ring dbell_ring;
172 struct rio_msg_tx_ring msg_tx_ring;
173 struct rio_msg_rx_ring msg_rx_ring;
174 int bellirq;
175 int txirq;
176 int rxirq;
177};
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800178
179/**
Zhang Weid02443a2008-04-18 13:33:38 -0700180 * fsl_rio_doorbell_send - Send a MPC85xx doorbell message
Randy Dunlap9941d942008-04-30 16:45:58 -0700181 * @mport: RapidIO master port info
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800182 * @index: ID of RapidIO interface
183 * @destid: Destination ID of target device
184 * @data: 16-bit info field of RapidIO doorbell message
185 *
186 * Sends a MPC85xx doorbell message. Returns %0 on success or
187 * %-EINVAL on failure.
188 */
Zhang Weiad1e9382008-04-18 13:33:41 -0700189static int fsl_rio_doorbell_send(struct rio_mport *mport,
190 int index, u16 destid, u16 data)
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800191{
Zhang Weiad1e9382008-04-18 13:33:41 -0700192 struct rio_priv *priv = mport->priv;
Zhang Weid02443a2008-04-18 13:33:38 -0700193 pr_debug("fsl_doorbell_send: index %d destid %4.4x data %4.4x\n",
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800194 index, destid, data);
Zhang Wei61b26912008-04-18 13:33:44 -0700195 switch (mport->phy_type) {
196 case RIO_PHY_PARALLEL:
197 out_be32(&priv->dbell_atmu_regs->rowtar, destid << 22);
198 out_be16(priv->dbell_win, data);
199 break;
200 case RIO_PHY_SERIAL:
201 /* In the serial version silicons, such as MPC8548, MPC8641,
202 * below operations is must be.
203 */
204 out_be32(&priv->msg_regs->odmr, 0x00000000);
205 out_be32(&priv->msg_regs->odretcr, 0x00000004);
206 out_be32(&priv->msg_regs->oddpr, destid << 16);
207 out_be32(&priv->msg_regs->oddatr, data);
208 out_be32(&priv->msg_regs->odmr, 0x00000001);
209 break;
210 }
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800211
212 return 0;
213}
214
215/**
Zhang Weid02443a2008-04-18 13:33:38 -0700216 * fsl_local_config_read - Generate a MPC85xx local config space read
Randy Dunlap9941d942008-04-30 16:45:58 -0700217 * @mport: RapidIO master port info
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800218 * @index: ID of RapdiIO interface
219 * @offset: Offset into configuration space
220 * @len: Length (in bytes) of the maintenance transaction
221 * @data: Value to be read into
222 *
223 * Generates a MPC85xx local configuration space read. Returns %0 on
224 * success or %-EINVAL on failure.
225 */
Zhang Weiad1e9382008-04-18 13:33:41 -0700226static int fsl_local_config_read(struct rio_mport *mport,
227 int index, u32 offset, int len, u32 *data)
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800228{
Zhang Weiad1e9382008-04-18 13:33:41 -0700229 struct rio_priv *priv = mport->priv;
Zhang Weid02443a2008-04-18 13:33:38 -0700230 pr_debug("fsl_local_config_read: index %d offset %8.8x\n", index,
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800231 offset);
Zhang Weiad1e9382008-04-18 13:33:41 -0700232 *data = in_be32(priv->regs_win + offset);
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800233
234 return 0;
235}
236
237/**
Zhang Weid02443a2008-04-18 13:33:38 -0700238 * fsl_local_config_write - Generate a MPC85xx local config space write
Randy Dunlap9941d942008-04-30 16:45:58 -0700239 * @mport: RapidIO master port info
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800240 * @index: ID of RapdiIO interface
241 * @offset: Offset into configuration space
242 * @len: Length (in bytes) of the maintenance transaction
243 * @data: Value to be written
244 *
245 * Generates a MPC85xx local configuration space write. Returns %0 on
246 * success or %-EINVAL on failure.
247 */
Zhang Weiad1e9382008-04-18 13:33:41 -0700248static int fsl_local_config_write(struct rio_mport *mport,
249 int index, u32 offset, int len, u32 data)
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800250{
Zhang Weiad1e9382008-04-18 13:33:41 -0700251 struct rio_priv *priv = mport->priv;
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800252 pr_debug
Zhang Weid02443a2008-04-18 13:33:38 -0700253 ("fsl_local_config_write: index %d offset %8.8x data %8.8x\n",
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800254 index, offset, data);
Zhang Weiad1e9382008-04-18 13:33:41 -0700255 out_be32(priv->regs_win + offset, data);
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800256
257 return 0;
258}
259
260/**
Zhang Weid02443a2008-04-18 13:33:38 -0700261 * fsl_rio_config_read - Generate a MPC85xx read maintenance transaction
Randy Dunlap9941d942008-04-30 16:45:58 -0700262 * @mport: RapidIO master port info
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800263 * @index: ID of RapdiIO interface
264 * @destid: Destination ID of transaction
265 * @hopcount: Number of hops to target device
266 * @offset: Offset into configuration space
267 * @len: Length (in bytes) of the maintenance transaction
268 * @val: Location to be read into
269 *
270 * Generates a MPC85xx read maintenance transaction. Returns %0 on
271 * success or %-EINVAL on failure.
272 */
273static int
Zhang Weiad1e9382008-04-18 13:33:41 -0700274fsl_rio_config_read(struct rio_mport *mport, int index, u16 destid,
275 u8 hopcount, u32 offset, int len, u32 *val)
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800276{
Zhang Weiad1e9382008-04-18 13:33:41 -0700277 struct rio_priv *priv = mport->priv;
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800278 u8 *data;
279
280 pr_debug
Zhang Weid02443a2008-04-18 13:33:38 -0700281 ("fsl_rio_config_read: index %d destid %d hopcount %d offset %8.8x len %d\n",
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800282 index, destid, hopcount, offset, len);
Zhang Weiad1e9382008-04-18 13:33:41 -0700283 out_be32(&priv->maint_atmu_regs->rowtar,
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800284 (destid << 22) | (hopcount << 12) | ((offset & ~0x3) >> 9));
285
Zhang Weiad1e9382008-04-18 13:33:41 -0700286 data = (u8 *) priv->maint_win + offset;
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800287 switch (len) {
288 case 1:
289 *val = in_8((u8 *) data);
290 break;
291 case 2:
292 *val = in_be16((u16 *) data);
293 break;
294 default:
295 *val = in_be32((u32 *) data);
296 break;
297 }
298
299 return 0;
300}
301
302/**
Zhang Weid02443a2008-04-18 13:33:38 -0700303 * fsl_rio_config_write - Generate a MPC85xx write maintenance transaction
Randy Dunlap9941d942008-04-30 16:45:58 -0700304 * @mport: RapidIO master port info
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800305 * @index: ID of RapdiIO interface
306 * @destid: Destination ID of transaction
307 * @hopcount: Number of hops to target device
308 * @offset: Offset into configuration space
309 * @len: Length (in bytes) of the maintenance transaction
310 * @val: Value to be written
311 *
312 * Generates an MPC85xx write maintenance transaction. Returns %0 on
313 * success or %-EINVAL on failure.
314 */
315static int
Zhang Weiad1e9382008-04-18 13:33:41 -0700316fsl_rio_config_write(struct rio_mport *mport, int index, u16 destid,
317 u8 hopcount, u32 offset, int len, u32 val)
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800318{
Zhang Weiad1e9382008-04-18 13:33:41 -0700319 struct rio_priv *priv = mport->priv;
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800320 u8 *data;
321 pr_debug
Zhang Weid02443a2008-04-18 13:33:38 -0700322 ("fsl_rio_config_write: index %d destid %d hopcount %d offset %8.8x len %d val %8.8x\n",
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800323 index, destid, hopcount, offset, len, val);
Zhang Weiad1e9382008-04-18 13:33:41 -0700324 out_be32(&priv->maint_atmu_regs->rowtar,
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800325 (destid << 22) | (hopcount << 12) | ((offset & ~0x3) >> 9));
326
Zhang Weiad1e9382008-04-18 13:33:41 -0700327 data = (u8 *) priv->maint_win + offset;
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800328 switch (len) {
329 case 1:
330 out_8((u8 *) data, val);
331 break;
332 case 2:
333 out_be16((u16 *) data, val);
334 break;
335 default:
336 out_be32((u32 *) data, val);
337 break;
338 }
339
340 return 0;
341}
342
343/**
344 * rio_hw_add_outb_message - Add message to the MPC85xx outbound message queue
345 * @mport: Master port with outbound message queue
346 * @rdev: Target of outbound message
347 * @mbox: Outbound mailbox
348 * @buffer: Message to add to outbound queue
349 * @len: Length of message
350 *
351 * Adds the @buffer message to the MPC85xx outbound message queue. Returns
352 * %0 on success or %-EINVAL on failure.
353 */
354int
355rio_hw_add_outb_message(struct rio_mport *mport, struct rio_dev *rdev, int mbox,
356 void *buffer, size_t len)
357{
Zhang Weiad1e9382008-04-18 13:33:41 -0700358 struct rio_priv *priv = mport->priv;
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800359 u32 omr;
Zhang Weiad1e9382008-04-18 13:33:41 -0700360 struct rio_tx_desc *desc = (struct rio_tx_desc *)priv->msg_tx_ring.virt
361 + priv->msg_tx_ring.tx_slot;
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800362 int ret = 0;
363
364 pr_debug
365 ("RIO: rio_hw_add_outb_message(): destid %4.4x mbox %d buffer %8.8x len %8.8x\n",
366 rdev->destid, mbox, (int)buffer, len);
367
368 if ((len < 8) || (len > RIO_MAX_MSG_SIZE)) {
369 ret = -EINVAL;
370 goto out;
371 }
372
373 /* Copy and clear rest of buffer */
Zhang Weiad1e9382008-04-18 13:33:41 -0700374 memcpy(priv->msg_tx_ring.virt_buffer[priv->msg_tx_ring.tx_slot], buffer,
375 len);
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800376 if (len < (RIO_MAX_MSG_SIZE - 4))
Zhang Weiad1e9382008-04-18 13:33:41 -0700377 memset(priv->msg_tx_ring.virt_buffer[priv->msg_tx_ring.tx_slot]
378 + len, 0, RIO_MAX_MSG_SIZE - len);
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800379
Zhang Wei61b26912008-04-18 13:33:44 -0700380 switch (mport->phy_type) {
381 case RIO_PHY_PARALLEL:
382 /* Set mbox field for message */
383 desc->dport = mbox & 0x3;
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800384
Zhang Wei61b26912008-04-18 13:33:44 -0700385 /* Enable EOMI interrupt, set priority, and set destid */
386 desc->dattr = 0x28000000 | (rdev->destid << 2);
387 break;
388 case RIO_PHY_SERIAL:
389 /* Set mbox field for message, and set destid */
390 desc->dport = (rdev->destid << 16) | (mbox & 0x3);
391
392 /* Enable EOMI interrupt and priority */
393 desc->dattr = 0x28000000;
394 break;
395 }
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800396
397 /* Set transfer size aligned to next power of 2 (in double words) */
398 desc->dwcnt = is_power_of_2(len) ? len : 1 << get_bitmask_order(len);
399
400 /* Set snooping and source buffer address */
Zhang Weiad1e9382008-04-18 13:33:41 -0700401 desc->saddr = 0x00000004
402 | priv->msg_tx_ring.phys_buffer[priv->msg_tx_ring.tx_slot];
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800403
404 /* Increment enqueue pointer */
Zhang Weiad1e9382008-04-18 13:33:41 -0700405 omr = in_be32(&priv->msg_regs->omr);
406 out_be32(&priv->msg_regs->omr, omr | RIO_MSG_OMR_MUI);
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800407
408 /* Go to next descriptor */
Zhang Weiad1e9382008-04-18 13:33:41 -0700409 if (++priv->msg_tx_ring.tx_slot == priv->msg_tx_ring.size)
410 priv->msg_tx_ring.tx_slot = 0;
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800411
412 out:
413 return ret;
414}
415
416EXPORT_SYMBOL_GPL(rio_hw_add_outb_message);
417
418/**
Zhang Weid02443a2008-04-18 13:33:38 -0700419 * fsl_rio_tx_handler - MPC85xx outbound message interrupt handler
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800420 * @irq: Linux interrupt number
421 * @dev_instance: Pointer to interrupt-specific data
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800422 *
423 * Handles outbound message interrupts. Executes a register outbound
Simon Arlotta8de5ce2007-05-12 05:42:54 +1000424 * mailbox event handler and acks the interrupt occurrence.
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800425 */
426static irqreturn_t
Zhang Weid02443a2008-04-18 13:33:38 -0700427fsl_rio_tx_handler(int irq, void *dev_instance)
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800428{
429 int osr;
430 struct rio_mport *port = (struct rio_mport *)dev_instance;
Zhang Weiad1e9382008-04-18 13:33:41 -0700431 struct rio_priv *priv = port->priv;
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800432
Zhang Weiad1e9382008-04-18 13:33:41 -0700433 osr = in_be32(&priv->msg_regs->osr);
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800434
435 if (osr & RIO_MSG_OSR_TE) {
436 pr_info("RIO: outbound message transmission error\n");
Zhang Weiad1e9382008-04-18 13:33:41 -0700437 out_be32(&priv->msg_regs->osr, RIO_MSG_OSR_TE);
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800438 goto out;
439 }
440
441 if (osr & RIO_MSG_OSR_QOI) {
442 pr_info("RIO: outbound message queue overflow\n");
Zhang Weiad1e9382008-04-18 13:33:41 -0700443 out_be32(&priv->msg_regs->osr, RIO_MSG_OSR_QOI);
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800444 goto out;
445 }
446
447 if (osr & RIO_MSG_OSR_EOMI) {
Zhang Weiad1e9382008-04-18 13:33:41 -0700448 u32 dqp = in_be32(&priv->msg_regs->odqdpar);
449 int slot = (dqp - priv->msg_tx_ring.phys) >> 5;
450 port->outb_msg[0].mcback(port, priv->msg_tx_ring.dev_id, -1,
451 slot);
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800452
453 /* Ack the end-of-message interrupt */
Zhang Weiad1e9382008-04-18 13:33:41 -0700454 out_be32(&priv->msg_regs->osr, RIO_MSG_OSR_EOMI);
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800455 }
456
457 out:
458 return IRQ_HANDLED;
459}
460
461/**
462 * rio_open_outb_mbox - Initialize MPC85xx outbound mailbox
463 * @mport: Master port implementing the outbound message unit
Matt Porter6978bbc2005-11-07 01:00:20 -0800464 * @dev_id: Device specific pointer to pass on event
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800465 * @mbox: Mailbox to open
466 * @entries: Number of entries in the outbound mailbox ring
467 *
468 * Initializes buffer ring, request the outbound message interrupt,
469 * and enables the outbound message unit. Returns %0 on success and
470 * %-EINVAL or %-ENOMEM on failure.
471 */
Matt Porter6978bbc2005-11-07 01:00:20 -0800472int rio_open_outb_mbox(struct rio_mport *mport, void *dev_id, int mbox, int entries)
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800473{
474 int i, j, rc = 0;
Zhang Weiad1e9382008-04-18 13:33:41 -0700475 struct rio_priv *priv = mport->priv;
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800476
477 if ((entries < RIO_MIN_TX_RING_SIZE) ||
478 (entries > RIO_MAX_TX_RING_SIZE) || (!is_power_of_2(entries))) {
479 rc = -EINVAL;
480 goto out;
481 }
482
483 /* Initialize shadow copy ring */
Zhang Weiad1e9382008-04-18 13:33:41 -0700484 priv->msg_tx_ring.dev_id = dev_id;
485 priv->msg_tx_ring.size = entries;
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800486
Zhang Weiad1e9382008-04-18 13:33:41 -0700487 for (i = 0; i < priv->msg_tx_ring.size; i++) {
488 priv->msg_tx_ring.virt_buffer[i] =
Anton Vorontsov0dbbbf12009-04-18 21:48:52 +0400489 dma_alloc_coherent(priv->dev, RIO_MSG_BUFFER_SIZE,
Zhang Weiad1e9382008-04-18 13:33:41 -0700490 &priv->msg_tx_ring.phys_buffer[i], GFP_KERNEL);
491 if (!priv->msg_tx_ring.virt_buffer[i]) {
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800492 rc = -ENOMEM;
Zhang Weiad1e9382008-04-18 13:33:41 -0700493 for (j = 0; j < priv->msg_tx_ring.size; j++)
494 if (priv->msg_tx_ring.virt_buffer[j])
Anton Vorontsov0dbbbf12009-04-18 21:48:52 +0400495 dma_free_coherent(priv->dev,
Zhang Weiad1e9382008-04-18 13:33:41 -0700496 RIO_MSG_BUFFER_SIZE,
497 priv->msg_tx_ring.
498 virt_buffer[j],
499 priv->msg_tx_ring.
500 phys_buffer[j]);
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800501 goto out;
502 }
503 }
504
505 /* Initialize outbound message descriptor ring */
Anton Vorontsov0dbbbf12009-04-18 21:48:52 +0400506 priv->msg_tx_ring.virt = dma_alloc_coherent(priv->dev,
Zhang Weiad1e9382008-04-18 13:33:41 -0700507 priv->msg_tx_ring.size * RIO_MSG_DESC_SIZE,
508 &priv->msg_tx_ring.phys, GFP_KERNEL);
509 if (!priv->msg_tx_ring.virt) {
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800510 rc = -ENOMEM;
511 goto out_dma;
512 }
Zhang Weiad1e9382008-04-18 13:33:41 -0700513 memset(priv->msg_tx_ring.virt, 0,
514 priv->msg_tx_ring.size * RIO_MSG_DESC_SIZE);
515 priv->msg_tx_ring.tx_slot = 0;
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800516
517 /* Point dequeue/enqueue pointers at first entry in ring */
Zhang Weiad1e9382008-04-18 13:33:41 -0700518 out_be32(&priv->msg_regs->odqdpar, priv->msg_tx_ring.phys);
519 out_be32(&priv->msg_regs->odqepar, priv->msg_tx_ring.phys);
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800520
521 /* Configure for snooping */
Zhang Weiad1e9382008-04-18 13:33:41 -0700522 out_be32(&priv->msg_regs->osar, 0x00000004);
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800523
524 /* Clear interrupt status */
Zhang Weiad1e9382008-04-18 13:33:41 -0700525 out_be32(&priv->msg_regs->osr, 0x000000b3);
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800526
527 /* Hook up outbound message handler */
Zhang Weiad1e9382008-04-18 13:33:41 -0700528 rc = request_irq(IRQ_RIO_TX(mport), fsl_rio_tx_handler, 0,
529 "msg_tx", (void *)mport);
530 if (rc < 0)
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800531 goto out_irq;
532
533 /*
534 * Configure outbound message unit
535 * Snooping
536 * Interrupts (all enabled, except QEIE)
537 * Chaining mode
538 * Disable
539 */
Zhang Weiad1e9382008-04-18 13:33:41 -0700540 out_be32(&priv->msg_regs->omr, 0x00100220);
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800541
542 /* Set number of entries */
Zhang Weiad1e9382008-04-18 13:33:41 -0700543 out_be32(&priv->msg_regs->omr,
544 in_be32(&priv->msg_regs->omr) |
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800545 ((get_bitmask_order(entries) - 2) << 12));
546
547 /* Now enable the unit */
Zhang Weiad1e9382008-04-18 13:33:41 -0700548 out_be32(&priv->msg_regs->omr, in_be32(&priv->msg_regs->omr) | 0x1);
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800549
550 out:
551 return rc;
552
553 out_irq:
Anton Vorontsov0dbbbf12009-04-18 21:48:52 +0400554 dma_free_coherent(priv->dev,
555 priv->msg_tx_ring.size * RIO_MSG_DESC_SIZE,
Zhang Weiad1e9382008-04-18 13:33:41 -0700556 priv->msg_tx_ring.virt, priv->msg_tx_ring.phys);
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800557
558 out_dma:
Zhang Weiad1e9382008-04-18 13:33:41 -0700559 for (i = 0; i < priv->msg_tx_ring.size; i++)
Anton Vorontsov0dbbbf12009-04-18 21:48:52 +0400560 dma_free_coherent(priv->dev, RIO_MSG_BUFFER_SIZE,
Zhang Weiad1e9382008-04-18 13:33:41 -0700561 priv->msg_tx_ring.virt_buffer[i],
562 priv->msg_tx_ring.phys_buffer[i]);
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800563
564 return rc;
565}
566
567/**
568 * rio_close_outb_mbox - Shut down MPC85xx outbound mailbox
569 * @mport: Master port implementing the outbound message unit
570 * @mbox: Mailbox to close
571 *
572 * Disables the outbound message unit, free all buffers, and
573 * frees the outbound message interrupt.
574 */
575void rio_close_outb_mbox(struct rio_mport *mport, int mbox)
576{
Zhang Weiad1e9382008-04-18 13:33:41 -0700577 struct rio_priv *priv = mport->priv;
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800578 /* Disable inbound message unit */
Zhang Weiad1e9382008-04-18 13:33:41 -0700579 out_be32(&priv->msg_regs->omr, 0);
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800580
581 /* Free ring */
Anton Vorontsov0dbbbf12009-04-18 21:48:52 +0400582 dma_free_coherent(priv->dev,
583 priv->msg_tx_ring.size * RIO_MSG_DESC_SIZE,
Zhang Weiad1e9382008-04-18 13:33:41 -0700584 priv->msg_tx_ring.virt, priv->msg_tx_ring.phys);
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800585
586 /* Free interrupt */
Zhang Weiad1e9382008-04-18 13:33:41 -0700587 free_irq(IRQ_RIO_TX(mport), (void *)mport);
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800588}
589
590/**
Zhang Weid02443a2008-04-18 13:33:38 -0700591 * fsl_rio_rx_handler - MPC85xx inbound message interrupt handler
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800592 * @irq: Linux interrupt number
593 * @dev_instance: Pointer to interrupt-specific data
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800594 *
595 * Handles inbound message interrupts. Executes a registered inbound
Simon Arlotta8de5ce2007-05-12 05:42:54 +1000596 * mailbox event handler and acks the interrupt occurrence.
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800597 */
598static irqreturn_t
Zhang Weid02443a2008-04-18 13:33:38 -0700599fsl_rio_rx_handler(int irq, void *dev_instance)
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800600{
601 int isr;
602 struct rio_mport *port = (struct rio_mport *)dev_instance;
Zhang Weiad1e9382008-04-18 13:33:41 -0700603 struct rio_priv *priv = port->priv;
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800604
Zhang Weiad1e9382008-04-18 13:33:41 -0700605 isr = in_be32(&priv->msg_regs->isr);
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800606
607 if (isr & RIO_MSG_ISR_TE) {
608 pr_info("RIO: inbound message reception error\n");
Zhang Weiad1e9382008-04-18 13:33:41 -0700609 out_be32((void *)&priv->msg_regs->isr, RIO_MSG_ISR_TE);
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800610 goto out;
611 }
612
613 /* XXX Need to check/dispatch until queue empty */
614 if (isr & RIO_MSG_ISR_DIQI) {
615 /*
616 * We implement *only* mailbox 0, but can receive messages
617 * for any mailbox/letter to that mailbox destination. So,
618 * make the callback with an unknown/invalid mailbox number
619 * argument.
620 */
Zhang Weiad1e9382008-04-18 13:33:41 -0700621 port->inb_msg[0].mcback(port, priv->msg_rx_ring.dev_id, -1, -1);
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800622
623 /* Ack the queueing interrupt */
Zhang Weiad1e9382008-04-18 13:33:41 -0700624 out_be32(&priv->msg_regs->isr, RIO_MSG_ISR_DIQI);
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800625 }
626
627 out:
628 return IRQ_HANDLED;
629}
630
631/**
632 * rio_open_inb_mbox - Initialize MPC85xx inbound mailbox
633 * @mport: Master port implementing the inbound message unit
Matt Porter6978bbc2005-11-07 01:00:20 -0800634 * @dev_id: Device specific pointer to pass on event
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800635 * @mbox: Mailbox to open
636 * @entries: Number of entries in the inbound mailbox ring
637 *
638 * Initializes buffer ring, request the inbound message interrupt,
639 * and enables the inbound message unit. Returns %0 on success
640 * and %-EINVAL or %-ENOMEM on failure.
641 */
Matt Porter6978bbc2005-11-07 01:00:20 -0800642int rio_open_inb_mbox(struct rio_mport *mport, void *dev_id, int mbox, int entries)
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800643{
644 int i, rc = 0;
Zhang Weiad1e9382008-04-18 13:33:41 -0700645 struct rio_priv *priv = mport->priv;
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800646
647 if ((entries < RIO_MIN_RX_RING_SIZE) ||
648 (entries > RIO_MAX_RX_RING_SIZE) || (!is_power_of_2(entries))) {
649 rc = -EINVAL;
650 goto out;
651 }
652
653 /* Initialize client buffer ring */
Zhang Weiad1e9382008-04-18 13:33:41 -0700654 priv->msg_rx_ring.dev_id = dev_id;
655 priv->msg_rx_ring.size = entries;
656 priv->msg_rx_ring.rx_slot = 0;
657 for (i = 0; i < priv->msg_rx_ring.size; i++)
658 priv->msg_rx_ring.virt_buffer[i] = NULL;
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800659
660 /* Initialize inbound message ring */
Anton Vorontsov0dbbbf12009-04-18 21:48:52 +0400661 priv->msg_rx_ring.virt = dma_alloc_coherent(priv->dev,
Zhang Weiad1e9382008-04-18 13:33:41 -0700662 priv->msg_rx_ring.size * RIO_MAX_MSG_SIZE,
663 &priv->msg_rx_ring.phys, GFP_KERNEL);
664 if (!priv->msg_rx_ring.virt) {
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800665 rc = -ENOMEM;
666 goto out;
667 }
668
669 /* Point dequeue/enqueue pointers at first entry in ring */
Zhang Weiad1e9382008-04-18 13:33:41 -0700670 out_be32(&priv->msg_regs->ifqdpar, (u32) priv->msg_rx_ring.phys);
671 out_be32(&priv->msg_regs->ifqepar, (u32) priv->msg_rx_ring.phys);
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800672
673 /* Clear interrupt status */
Zhang Weiad1e9382008-04-18 13:33:41 -0700674 out_be32(&priv->msg_regs->isr, 0x00000091);
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800675
676 /* Hook up inbound message handler */
Zhang Weiad1e9382008-04-18 13:33:41 -0700677 rc = request_irq(IRQ_RIO_RX(mport), fsl_rio_rx_handler, 0,
678 "msg_rx", (void *)mport);
679 if (rc < 0) {
Anton Vorontsov0dbbbf12009-04-18 21:48:52 +0400680 dma_free_coherent(priv->dev, RIO_MSG_BUFFER_SIZE,
Zhang Weiad1e9382008-04-18 13:33:41 -0700681 priv->msg_tx_ring.virt_buffer[i],
682 priv->msg_tx_ring.phys_buffer[i]);
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800683 goto out;
684 }
685
686 /*
687 * Configure inbound message unit:
688 * Snooping
689 * 4KB max message size
690 * Unmask all interrupt sources
691 * Disable
692 */
Zhang Weiad1e9382008-04-18 13:33:41 -0700693 out_be32(&priv->msg_regs->imr, 0x001b0060);
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800694
695 /* Set number of queue entries */
Zhang Weiad1e9382008-04-18 13:33:41 -0700696 setbits32(&priv->msg_regs->imr, (get_bitmask_order(entries) - 2) << 12);
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800697
698 /* Now enable the unit */
Zhang Weiad1e9382008-04-18 13:33:41 -0700699 setbits32(&priv->msg_regs->imr, 0x1);
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800700
701 out:
702 return rc;
703}
704
705/**
706 * rio_close_inb_mbox - Shut down MPC85xx inbound mailbox
707 * @mport: Master port implementing the inbound message unit
708 * @mbox: Mailbox to close
709 *
710 * Disables the inbound message unit, free all buffers, and
711 * frees the inbound message interrupt.
712 */
713void rio_close_inb_mbox(struct rio_mport *mport, int mbox)
714{
Zhang Weiad1e9382008-04-18 13:33:41 -0700715 struct rio_priv *priv = mport->priv;
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800716 /* Disable inbound message unit */
Zhang Weiad1e9382008-04-18 13:33:41 -0700717 out_be32(&priv->msg_regs->imr, 0);
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800718
719 /* Free ring */
Anton Vorontsov0dbbbf12009-04-18 21:48:52 +0400720 dma_free_coherent(priv->dev, priv->msg_rx_ring.size * RIO_MAX_MSG_SIZE,
Zhang Weiad1e9382008-04-18 13:33:41 -0700721 priv->msg_rx_ring.virt, priv->msg_rx_ring.phys);
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800722
723 /* Free interrupt */
Zhang Weiad1e9382008-04-18 13:33:41 -0700724 free_irq(IRQ_RIO_RX(mport), (void *)mport);
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800725}
726
727/**
728 * rio_hw_add_inb_buffer - Add buffer to the MPC85xx inbound message queue
729 * @mport: Master port implementing the inbound message unit
730 * @mbox: Inbound mailbox number
731 * @buf: Buffer to add to inbound queue
732 *
733 * Adds the @buf buffer to the MPC85xx inbound message queue. Returns
734 * %0 on success or %-EINVAL on failure.
735 */
736int rio_hw_add_inb_buffer(struct rio_mport *mport, int mbox, void *buf)
737{
738 int rc = 0;
Zhang Weiad1e9382008-04-18 13:33:41 -0700739 struct rio_priv *priv = mport->priv;
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800740
741 pr_debug("RIO: rio_hw_add_inb_buffer(), msg_rx_ring.rx_slot %d\n",
Zhang Weiad1e9382008-04-18 13:33:41 -0700742 priv->msg_rx_ring.rx_slot);
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800743
Zhang Weiad1e9382008-04-18 13:33:41 -0700744 if (priv->msg_rx_ring.virt_buffer[priv->msg_rx_ring.rx_slot]) {
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800745 printk(KERN_ERR
746 "RIO: error adding inbound buffer %d, buffer exists\n",
Zhang Weiad1e9382008-04-18 13:33:41 -0700747 priv->msg_rx_ring.rx_slot);
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800748 rc = -EINVAL;
749 goto out;
750 }
751
Zhang Weiad1e9382008-04-18 13:33:41 -0700752 priv->msg_rx_ring.virt_buffer[priv->msg_rx_ring.rx_slot] = buf;
753 if (++priv->msg_rx_ring.rx_slot == priv->msg_rx_ring.size)
754 priv->msg_rx_ring.rx_slot = 0;
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800755
756 out:
757 return rc;
758}
759
760EXPORT_SYMBOL_GPL(rio_hw_add_inb_buffer);
761
762/**
763 * rio_hw_get_inb_message - Fetch inbound message from the MPC85xx message unit
764 * @mport: Master port implementing the inbound message unit
765 * @mbox: Inbound mailbox number
766 *
767 * Gets the next available inbound message from the inbound message queue.
768 * A pointer to the message is returned on success or NULL on failure.
769 */
770void *rio_hw_get_inb_message(struct rio_mport *mport, int mbox)
771{
Zhang Weiad1e9382008-04-18 13:33:41 -0700772 struct rio_priv *priv = mport->priv;
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800773 u32 phys_buf, virt_buf;
774 void *buf = NULL;
775 int buf_idx;
776
Zhang Weiad1e9382008-04-18 13:33:41 -0700777 phys_buf = in_be32(&priv->msg_regs->ifqdpar);
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800778
779 /* If no more messages, then bail out */
Zhang Weiad1e9382008-04-18 13:33:41 -0700780 if (phys_buf == in_be32(&priv->msg_regs->ifqepar))
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800781 goto out2;
782
Zhang Weiad1e9382008-04-18 13:33:41 -0700783 virt_buf = (u32) priv->msg_rx_ring.virt + (phys_buf
784 - priv->msg_rx_ring.phys);
785 buf_idx = (phys_buf - priv->msg_rx_ring.phys) / RIO_MAX_MSG_SIZE;
786 buf = priv->msg_rx_ring.virt_buffer[buf_idx];
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800787
788 if (!buf) {
789 printk(KERN_ERR
790 "RIO: inbound message copy failed, no buffers\n");
791 goto out1;
792 }
793
794 /* Copy max message size, caller is expected to allocate that big */
795 memcpy(buf, (void *)virt_buf, RIO_MAX_MSG_SIZE);
796
797 /* Clear the available buffer */
Zhang Weiad1e9382008-04-18 13:33:41 -0700798 priv->msg_rx_ring.virt_buffer[buf_idx] = NULL;
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800799
800 out1:
Zhang Weiad1e9382008-04-18 13:33:41 -0700801 setbits32(&priv->msg_regs->imr, RIO_MSG_IMR_MI);
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800802
803 out2:
804 return buf;
805}
806
807EXPORT_SYMBOL_GPL(rio_hw_get_inb_message);
808
809/**
Zhang Weid02443a2008-04-18 13:33:38 -0700810 * fsl_rio_dbell_handler - MPC85xx doorbell interrupt handler
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800811 * @irq: Linux interrupt number
812 * @dev_instance: Pointer to interrupt-specific data
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800813 *
814 * Handles doorbell interrupts. Parses a list of registered
815 * doorbell event handlers and executes a matching event handler.
816 */
817static irqreturn_t
Zhang Weid02443a2008-04-18 13:33:38 -0700818fsl_rio_dbell_handler(int irq, void *dev_instance)
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800819{
820 int dsr;
821 struct rio_mport *port = (struct rio_mport *)dev_instance;
Zhang Weiad1e9382008-04-18 13:33:41 -0700822 struct rio_priv *priv = port->priv;
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800823
Zhang Weiad1e9382008-04-18 13:33:41 -0700824 dsr = in_be32(&priv->msg_regs->dsr);
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800825
826 if (dsr & DOORBELL_DSR_TE) {
827 pr_info("RIO: doorbell reception error\n");
Zhang Weiad1e9382008-04-18 13:33:41 -0700828 out_be32(&priv->msg_regs->dsr, DOORBELL_DSR_TE);
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800829 goto out;
830 }
831
832 if (dsr & DOORBELL_DSR_QFI) {
833 pr_info("RIO: doorbell queue full\n");
Zhang Weiad1e9382008-04-18 13:33:41 -0700834 out_be32(&priv->msg_regs->dsr, DOORBELL_DSR_QFI);
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800835 goto out;
836 }
837
838 /* XXX Need to check/dispatch until queue empty */
839 if (dsr & DOORBELL_DSR_DIQI) {
840 u32 dmsg =
Zhang Weiad1e9382008-04-18 13:33:41 -0700841 (u32) priv->dbell_ring.virt +
842 (in_be32(&priv->msg_regs->dqdpar) & 0xfff);
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800843 struct rio_dbell *dbell;
844 int found = 0;
845
846 pr_debug
847 ("RIO: processing doorbell, sid %2.2x tid %2.2x info %4.4x\n",
848 DBELL_SID(dmsg), DBELL_TID(dmsg), DBELL_INF(dmsg));
849
850 list_for_each_entry(dbell, &port->dbells, node) {
851 if ((dbell->res->start <= DBELL_INF(dmsg)) &&
852 (dbell->res->end >= DBELL_INF(dmsg))) {
853 found = 1;
854 break;
855 }
856 }
857 if (found) {
Matt Porter6978bbc2005-11-07 01:00:20 -0800858 dbell->dinb(port, dbell->dev_id, DBELL_SID(dmsg), DBELL_TID(dmsg),
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800859 DBELL_INF(dmsg));
860 } else {
861 pr_debug
862 ("RIO: spurious doorbell, sid %2.2x tid %2.2x info %4.4x\n",
863 DBELL_SID(dmsg), DBELL_TID(dmsg), DBELL_INF(dmsg));
864 }
Zhang Weiad1e9382008-04-18 13:33:41 -0700865 setbits32(&priv->msg_regs->dmr, DOORBELL_DMR_DI);
866 out_be32(&priv->msg_regs->dsr, DOORBELL_DSR_DIQI);
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800867 }
868
869 out:
870 return IRQ_HANDLED;
871}
872
873/**
Zhang Weid02443a2008-04-18 13:33:38 -0700874 * fsl_rio_doorbell_init - MPC85xx doorbell interface init
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800875 * @mport: Master port implementing the inbound doorbell unit
876 *
877 * Initializes doorbell unit hardware and inbound DMA buffer
Zhang Weid02443a2008-04-18 13:33:38 -0700878 * ring. Called from fsl_rio_setup(). Returns %0 on success
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800879 * or %-ENOMEM on failure.
880 */
Zhang Weid02443a2008-04-18 13:33:38 -0700881static int fsl_rio_doorbell_init(struct rio_mport *mport)
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800882{
Zhang Weiad1e9382008-04-18 13:33:41 -0700883 struct rio_priv *priv = mport->priv;
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800884 int rc = 0;
885
886 /* Map outbound doorbell window immediately after maintenance window */
Zhang Weiad1e9382008-04-18 13:33:41 -0700887 priv->dbell_win = ioremap(mport->iores.start + RIO_MAINT_WIN_SIZE,
888 RIO_DBELL_WIN_SIZE);
889 if (!priv->dbell_win) {
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800890 printk(KERN_ERR
891 "RIO: unable to map outbound doorbell window\n");
892 rc = -ENOMEM;
893 goto out;
894 }
895
896 /* Initialize inbound doorbells */
Anton Vorontsov0dbbbf12009-04-18 21:48:52 +0400897 priv->dbell_ring.virt = dma_alloc_coherent(priv->dev, 512 *
Zhang Weiad1e9382008-04-18 13:33:41 -0700898 DOORBELL_MESSAGE_SIZE, &priv->dbell_ring.phys, GFP_KERNEL);
899 if (!priv->dbell_ring.virt) {
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800900 printk(KERN_ERR "RIO: unable allocate inbound doorbell ring\n");
901 rc = -ENOMEM;
Zhang Weiad1e9382008-04-18 13:33:41 -0700902 iounmap(priv->dbell_win);
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800903 goto out;
904 }
905
906 /* Point dequeue/enqueue pointers at first entry in ring */
Zhang Weiad1e9382008-04-18 13:33:41 -0700907 out_be32(&priv->msg_regs->dqdpar, (u32) priv->dbell_ring.phys);
908 out_be32(&priv->msg_regs->dqepar, (u32) priv->dbell_ring.phys);
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800909
910 /* Clear interrupt status */
Zhang Weiad1e9382008-04-18 13:33:41 -0700911 out_be32(&priv->msg_regs->dsr, 0x00000091);
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800912
913 /* Hook up doorbell handler */
Zhang Weiad1e9382008-04-18 13:33:41 -0700914 rc = request_irq(IRQ_RIO_BELL(mport), fsl_rio_dbell_handler, 0,
915 "dbell_rx", (void *)mport);
916 if (rc < 0) {
917 iounmap(priv->dbell_win);
Anton Vorontsov0dbbbf12009-04-18 21:48:52 +0400918 dma_free_coherent(priv->dev, 512 * DOORBELL_MESSAGE_SIZE,
Zhang Weiad1e9382008-04-18 13:33:41 -0700919 priv->dbell_ring.virt, priv->dbell_ring.phys);
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800920 printk(KERN_ERR
921 "MPC85xx RIO: unable to request inbound doorbell irq");
922 goto out;
923 }
924
925 /* Configure doorbells for snooping, 512 entries, and enable */
Zhang Weiad1e9382008-04-18 13:33:41 -0700926 out_be32(&priv->msg_regs->dmr, 0x00108161);
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800927
928 out:
929 return rc;
930}
931
932static char *cmdline = NULL;
933
Zhang Weid02443a2008-04-18 13:33:38 -0700934static int fsl_rio_get_hdid(int index)
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800935{
936 /* XXX Need to parse multiple entries in some format */
937 if (!cmdline)
938 return -1;
939
940 return simple_strtol(cmdline, NULL, 0);
941}
942
Zhang Weid02443a2008-04-18 13:33:38 -0700943static int fsl_rio_get_cmdline(char *s)
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800944{
945 if (!s)
946 return 0;
947
948 cmdline = s;
949 return 1;
950}
951
Zhang Weid02443a2008-04-18 13:33:38 -0700952__setup("riohdid=", fsl_rio_get_cmdline);
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800953
Zhang Wei7f620df2008-04-18 13:33:44 -0700954static inline void fsl_rio_info(struct device *dev, u32 ccsr)
955{
956 const char *str;
957 if (ccsr & 1) {
958 /* Serial phy */
959 switch (ccsr >> 30) {
960 case 0:
961 str = "1";
962 break;
963 case 1:
964 str = "4";
965 break;
966 default:
967 str = "Unknown";
968 break;;
969 }
970 dev_info(dev, "Hardware port width: %s\n", str);
971
972 switch ((ccsr >> 27) & 7) {
973 case 0:
974 str = "Single-lane 0";
975 break;
976 case 1:
977 str = "Single-lane 2";
978 break;
979 case 2:
980 str = "Four-lane";
981 break;
982 default:
983 str = "Unknown";
984 break;
985 }
986 dev_info(dev, "Training connection status: %s\n", str);
987 } else {
988 /* Parallel phy */
989 if (!(ccsr & 0x80000000))
990 dev_info(dev, "Output port operating in 8-bit mode\n");
991 if (!(ccsr & 0x08000000))
992 dev_info(dev, "Input port operating in 8-bit mode\n");
993 }
994}
995
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800996/**
Randy Dunlap9941d942008-04-30 16:45:58 -0700997 * fsl_rio_setup - Setup Freescale PowerPC RapidIO interface
998 * @dev: of_device pointer
Matt Porter2b0c28d7f2005-11-07 01:00:19 -0800999 *
1000 * Initializes MPC85xx RapidIO hardware interface, configures
1001 * master port with system-specific info, and registers the
1002 * master port with the RapidIO subsystem.
1003 */
Zhang Weicc2bb692008-04-18 13:33:41 -07001004int fsl_rio_setup(struct of_device *dev)
Matt Porter2b0c28d7f2005-11-07 01:00:19 -08001005{
1006 struct rio_ops *ops;
1007 struct rio_mport *port;
Zhang Weicc2bb692008-04-18 13:33:41 -07001008 struct rio_priv *priv;
1009 int rc = 0;
1010 const u32 *dt_range, *cell;
1011 struct resource regs;
1012 int rlen;
Zhang Wei61b26912008-04-18 13:33:44 -07001013 u32 ccsr;
Zhang Weicc2bb692008-04-18 13:33:41 -07001014 u64 law_start, law_size;
1015 int paw, aw, sw;
1016
1017 if (!dev->node) {
1018 dev_err(&dev->dev, "Device OF-Node is NULL");
1019 return -EFAULT;
1020 }
1021
1022 rc = of_address_to_resource(dev->node, 0, &regs);
1023 if (rc) {
1024 dev_err(&dev->dev, "Can't get %s property 'reg'\n",
1025 dev->node->full_name);
1026 return -EFAULT;
1027 }
1028 dev_info(&dev->dev, "Of-device full name %s\n", dev->node->full_name);
Kumar Galafc274a12009-05-13 17:02:24 -05001029 dev_info(&dev->dev, "Regs: %pR\n", &regs);
Zhang Weicc2bb692008-04-18 13:33:41 -07001030
1031 dt_range = of_get_property(dev->node, "ranges", &rlen);
1032 if (!dt_range) {
1033 dev_err(&dev->dev, "Can't get %s property 'ranges'\n",
1034 dev->node->full_name);
1035 return -EFAULT;
1036 }
1037
1038 /* Get node address wide */
1039 cell = of_get_property(dev->node, "#address-cells", NULL);
1040 if (cell)
1041 aw = *cell;
1042 else
1043 aw = of_n_addr_cells(dev->node);
1044 /* Get node size wide */
1045 cell = of_get_property(dev->node, "#size-cells", NULL);
1046 if (cell)
1047 sw = *cell;
1048 else
1049 sw = of_n_size_cells(dev->node);
1050 /* Get parent address wide wide */
1051 paw = of_n_addr_cells(dev->node);
1052
1053 law_start = of_read_number(dt_range + aw, paw);
1054 law_size = of_read_number(dt_range + aw + paw, sw);
1055
1056 dev_info(&dev->dev, "LAW start 0x%016llx, size 0x%016llx.\n",
1057 law_start, law_size);
Matt Porter2b0c28d7f2005-11-07 01:00:19 -08001058
1059 ops = kmalloc(sizeof(struct rio_ops), GFP_KERNEL);
Zhang Weid02443a2008-04-18 13:33:38 -07001060 ops->lcread = fsl_local_config_read;
1061 ops->lcwrite = fsl_local_config_write;
1062 ops->cread = fsl_rio_config_read;
1063 ops->cwrite = fsl_rio_config_write;
1064 ops->dsend = fsl_rio_doorbell_send;
Matt Porter2b0c28d7f2005-11-07 01:00:19 -08001065
Zhang Weiad1e9382008-04-18 13:33:41 -07001066 port = kzalloc(sizeof(struct rio_mport), GFP_KERNEL);
Matt Porter2b0c28d7f2005-11-07 01:00:19 -08001067 port->id = 0;
1068 port->index = 0;
Zhang Weiad1e9382008-04-18 13:33:41 -07001069
1070 priv = kzalloc(sizeof(struct rio_priv), GFP_KERNEL);
1071 if (!priv) {
1072 printk(KERN_ERR "Can't alloc memory for 'priv'\n");
1073 rc = -ENOMEM;
1074 goto err;
1075 }
1076
Matt Porter2b0c28d7f2005-11-07 01:00:19 -08001077 INIT_LIST_HEAD(&port->dbells);
1078 port->iores.start = law_start;
Li Yang186e74b2009-05-12 16:35:59 +08001079 port->iores.end = law_start + law_size - 1;
Matt Porter2b0c28d7f2005-11-07 01:00:19 -08001080 port->iores.flags = IORESOURCE_MEM;
Li Yang186e74b2009-05-12 16:35:59 +08001081 port->iores.name = "rio_io_win";
Matt Porter2b0c28d7f2005-11-07 01:00:19 -08001082
Zhang Weicc2bb692008-04-18 13:33:41 -07001083 priv->bellirq = irq_of_parse_and_map(dev->node, 2);
1084 priv->txirq = irq_of_parse_and_map(dev->node, 3);
1085 priv->rxirq = irq_of_parse_and_map(dev->node, 4);
1086 dev_info(&dev->dev, "bellirq: %d, txirq: %d, rxirq %d\n", priv->bellirq,
1087 priv->txirq, priv->rxirq);
1088
Matt Porter2b0c28d7f2005-11-07 01:00:19 -08001089 rio_init_dbell_res(&port->riores[RIO_DOORBELL_RESOURCE], 0, 0xffff);
1090 rio_init_mbox_res(&port->riores[RIO_INB_MBOX_RESOURCE], 0, 0);
1091 rio_init_mbox_res(&port->riores[RIO_OUTB_MBOX_RESOURCE], 0, 0);
1092 strcpy(port->name, "RIO0 mport");
1093
Anton Vorontsov0dbbbf12009-04-18 21:48:52 +04001094 priv->dev = &dev->dev;
1095
Matt Porter2b0c28d7f2005-11-07 01:00:19 -08001096 port->ops = ops;
Zhang Weid02443a2008-04-18 13:33:38 -07001097 port->host_deviceid = fsl_rio_get_hdid(port->id);
Matt Porter2b0c28d7f2005-11-07 01:00:19 -08001098
Zhang Weiad1e9382008-04-18 13:33:41 -07001099 port->priv = priv;
Matt Porter2b0c28d7f2005-11-07 01:00:19 -08001100 rio_register_mport(port);
1101
Zhang Weicc2bb692008-04-18 13:33:41 -07001102 priv->regs_win = ioremap(regs.start, regs.end - regs.start + 1);
Zhang Weie0423232008-04-18 13:33:42 -07001103
Zhang Wei61b26912008-04-18 13:33:44 -07001104 /* Probe the master port phy type */
1105 ccsr = in_be32(priv->regs_win + RIO_CCSR);
1106 port->phy_type = (ccsr & 1) ? RIO_PHY_SERIAL : RIO_PHY_PARALLEL;
1107 dev_info(&dev->dev, "RapidIO PHY type: %s\n",
1108 (port->phy_type == RIO_PHY_PARALLEL) ? "parallel" :
1109 ((port->phy_type == RIO_PHY_SERIAL) ? "serial" :
1110 "unknown"));
Zhang Wei7f620df2008-04-18 13:33:44 -07001111 /* Checking the port training status */
1112 if (in_be32((priv->regs_win + RIO_ESCSR)) & 1) {
1113 dev_err(&dev->dev, "Port is not ready. "
1114 "Try to restart connection...\n");
1115 switch (port->phy_type) {
1116 case RIO_PHY_SERIAL:
1117 /* Disable ports */
1118 out_be32(priv->regs_win + RIO_CCSR, 0);
1119 /* Set 1x lane */
1120 setbits32(priv->regs_win + RIO_CCSR, 0x02000000);
1121 /* Enable ports */
1122 setbits32(priv->regs_win + RIO_CCSR, 0x00600000);
1123 break;
1124 case RIO_PHY_PARALLEL:
1125 /* Disable ports */
1126 out_be32(priv->regs_win + RIO_CCSR, 0x22000000);
1127 /* Enable ports */
1128 out_be32(priv->regs_win + RIO_CCSR, 0x44000000);
1129 break;
1130 }
1131 msleep(100);
1132 if (in_be32((priv->regs_win + RIO_ESCSR)) & 1) {
1133 dev_err(&dev->dev, "Port restart failed.\n");
1134 rc = -ENOLINK;
1135 goto err;
1136 }
1137 dev_info(&dev->dev, "Port restart success!\n");
1138 }
1139 fsl_rio_info(&dev->dev, ccsr);
Zhang Wei61b26912008-04-18 13:33:44 -07001140
Zhang Weie0423232008-04-18 13:33:42 -07001141 port->sys_size = (in_be32((priv->regs_win + RIO_PEF_CAR))
1142 & RIO_PEF_CTLS) >> 4;
1143 dev_info(&dev->dev, "RapidIO Common Transport System size: %d\n",
1144 port->sys_size ? 65536 : 256);
1145
Zhang Weiad1e9382008-04-18 13:33:41 -07001146 priv->atmu_regs = (struct rio_atmu_regs *)(priv->regs_win
1147 + RIO_ATMU_REGS_OFFSET);
1148 priv->maint_atmu_regs = priv->atmu_regs + 1;
1149 priv->dbell_atmu_regs = priv->atmu_regs + 2;
Zhang Wei61b26912008-04-18 13:33:44 -07001150 priv->msg_regs = (struct rio_msg_regs *)(priv->regs_win +
1151 ((port->phy_type == RIO_PHY_SERIAL) ?
1152 RIO_S_MSG_REGS_OFFSET : RIO_P_MSG_REGS_OFFSET));
1153
1154 /* Set to receive any dist ID for serial RapidIO controller. */
1155 if (port->phy_type == RIO_PHY_SERIAL)
1156 out_be32((priv->regs_win + RIO_ISR_AACR), RIO_ISR_AACR_AA);
Matt Porter2b0c28d7f2005-11-07 01:00:19 -08001157
1158 /* Configure maintenance transaction window */
Li Yang186e74b2009-05-12 16:35:59 +08001159 out_be32(&priv->maint_atmu_regs->rowbar, law_start >> 12);
1160 out_be32(&priv->maint_atmu_regs->rowar, 0x80077015); /* 4M */
Matt Porter2b0c28d7f2005-11-07 01:00:19 -08001161
Zhang Weiad1e9382008-04-18 13:33:41 -07001162 priv->maint_win = ioremap(law_start, RIO_MAINT_WIN_SIZE);
Matt Porter2b0c28d7f2005-11-07 01:00:19 -08001163
1164 /* Configure outbound doorbell window */
Li Yang186e74b2009-05-12 16:35:59 +08001165 out_be32(&priv->dbell_atmu_regs->rowbar,
1166 (law_start + RIO_MAINT_WIN_SIZE) >> 12);
1167 out_be32(&priv->dbell_atmu_regs->rowar, 0x8004200b); /* 4k */
Zhang Weid02443a2008-04-18 13:33:38 -07001168 fsl_rio_doorbell_init(port);
Zhang Weiad1e9382008-04-18 13:33:41 -07001169
Zhang Weicc2bb692008-04-18 13:33:41 -07001170 return 0;
Zhang Weiad1e9382008-04-18 13:33:41 -07001171err:
1172 if (priv)
1173 iounmap(priv->regs_win);
Zhang Weicc2bb692008-04-18 13:33:41 -07001174 kfree(ops);
Zhang Weiad1e9382008-04-18 13:33:41 -07001175 kfree(priv);
1176 kfree(port);
Zhang Weicc2bb692008-04-18 13:33:41 -07001177 return rc;
Matt Porter2b0c28d7f2005-11-07 01:00:19 -08001178}
Zhang Weicc2bb692008-04-18 13:33:41 -07001179
1180/* The probe function for RapidIO peer-to-peer network.
1181 */
1182static int __devinit fsl_of_rio_rpn_probe(struct of_device *dev,
1183 const struct of_device_id *match)
1184{
1185 int rc;
1186 printk(KERN_INFO "Setting up RapidIO peer-to-peer network %s\n",
1187 dev->node->full_name);
1188
1189 rc = fsl_rio_setup(dev);
1190 if (rc)
1191 goto out;
1192
1193 /* Enumerate all registered ports */
1194 rc = rio_init_mports();
1195out:
1196 return rc;
1197};
1198
1199static const struct of_device_id fsl_of_rio_rpn_ids[] = {
1200 {
1201 .compatible = "fsl,rapidio-delta",
1202 },
1203 {},
1204};
1205
1206static struct of_platform_driver fsl_of_rio_rpn_driver = {
1207 .name = "fsl-of-rio",
1208 .match_table = fsl_of_rio_rpn_ids,
1209 .probe = fsl_of_rio_rpn_probe,
1210};
1211
1212static __init int fsl_of_rio_rpn_init(void)
1213{
1214 return of_register_platform_driver(&fsl_of_rio_rpn_driver);
1215}
1216
1217subsys_initcall(fsl_of_rio_rpn_init);