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rapidio: change inbound window size type to u64
[linux-2.6-block.git] / arch / powerpc / sysdev / fsl_rio.c
CommitLineData
2b0c28d7 1/*
d02443a6 2 * Freescale MPC85xx/MPC86xx RapidIO support
2b0c28d7 3 *
bd4fb654
TM		 4 * Copyright 2009 Sysgo AG
5 * Thomas Moll <thomas.moll@sysgo.com>
6 * - fixed maintenance access routines, check for aligned access
7 *
5b2074ae
AB		 8 * Copyright 2009 Integrated Device Technology, Inc.
9 * Alex Bounine <alexandre.bounine@idt.com>
10 * - Added Port-Write message handling
11 * - Added Machine Check exception handling
12 *
6ec4bedb 13 * Copyright (C) 2007, 2008, 2010, 2011 Freescale Semiconductor, Inc.
ad1e9380
ZW		 14 * Zhang Wei <wei.zhang@freescale.com>
15 *
2b0c28d7
MP		 16 * Copyright 2005 MontaVista Software, Inc.
17 * Matt Porter <mporter@kernel.crashing.org>
18 *
19 * This program is free software; you can redistribute it and/or modify it
20 * under the terms of the GNU General Public License as published by the
21 * Free Software Foundation; either version 2 of the License, or (at your
22 * option) any later version.
23 */
24
2b0c28d7 25#include <linux/init.h>
e0ce42e1 26#include <linux/module.h>
2b0c28d7
MP		 27#include <linux/types.h>
28#include <linux/dma-mapping.h>
29#include <linux/interrupt.h>
0dbbbf1a 30#include <linux/device.h>
26a2056e
RH		 31#include <linux/of_address.h>
32#include <linux/of_irq.h>
cc2bb696 33#include <linux/of_platform.h>
61b26917 34#include <linux/delay.h>
5a0e3ad6 35#include <linux/slab.h>
2b0c28d7 36
6ec4bedb
LG		 37#include <linux/io.h>
38#include <linux/uaccess.h>
a52c8f52 39#include <asm/machdep.h>
2b0c28d7 40
6ec4bedb 41#include "fsl_rio.h"
5b2074ae 42
6ec4bedb 43#undef DEBUG_PW /* Port-Write debugging */
6ff31453
SX		 44
45#define RIO_PORT1_EDCSR 0x0640
46#define RIO_PORT2_EDCSR 0x0680
47#define RIO_PORT1_IECSR 0x10130
48#define RIO_PORT2_IECSR 0x101B0
6ff31453 49
af84ca38 50#define RIO_GCCSR 0x13c
61b26917 51#define RIO_ESCSR 0x158
6ec4bedb 52#define ESCSR_CLEAR 0x07120204
6ff31453 53#define RIO_PORT2_ESCSR 0x178
61b26917 54#define RIO_CCSR 0x15c
6ff31453
SX		 55#define RIO_LTLEDCSR_IER 0x80000000
56#define RIO_LTLEDCSR_PRT 0x01000000
6ec4bedb 57#define IECSR_CLEAR 0x80000000
61b26917
ZW		 58#define RIO_ISR_AACR 0x10120
59#define RIO_ISR_AACR_AA 0x1 /* Accept All ID */
2b0c28d7 60
e6a546fd
MG		 61#define RIWTAR_TRAD_VAL_SHIFT 12
62#define RIWTAR_TRAD_MASK 0x00FFFFFF
63#define RIWBAR_BADD_VAL_SHIFT 12
64#define RIWBAR_BADD_MASK 0x003FFFFF
65#define RIWAR_ENABLE 0x80000000
66#define RIWAR_TGINT_LOCAL 0x00F00000
67#define RIWAR_RDTYP_NO_SNOOP 0x00040000
68#define RIWAR_RDTYP_SNOOP 0x00050000
69#define RIWAR_WRTYP_NO_SNOOP 0x00004000
70#define RIWAR_WRTYP_SNOOP 0x00005000
71#define RIWAR_WRTYP_ALLOC 0x00006000
72#define RIWAR_SIZE_MASK 0x0000003F
73
a52c8f52
AB		 74#define __fsl_read_rio_config(x, addr, err, op) \
75 __asm__ __volatile__( \
76 "1: "op" %1,0(%2)\n" \
77 " eieio\n" \
78 "2:\n" \
79 ".section .fixup,\"ax\"\n" \
80 "3: li %1,-1\n" \
81 " li %0,%3\n" \
82 " b 2b\n" \
83 ".section __ex_table,\"a\"\n" \
b6c46dcf
LG		 84 PPC_LONG_ALIGN "\n" \
85 PPC_LONG "1b,3b\n" \
a52c8f52
AB		 86 ".text" \
87 : "=r" (err), "=r" (x) \
88 : "b" (addr), "i" (-EFAULT), "0" (err))
89
6ec4bedb 90void __iomem *rio_regs_win;
abc3aeae
LG		 91void __iomem *rmu_regs_win;
92resource_size_t rio_law_start;
93
94struct fsl_rio_dbell *dbell;
95struct fsl_rio_pw *pw;
a52c8f52 96
ff33f182 97#ifdef CONFIG_E500
cce1f106 98int fsl_rio_mcheck_exception(struct pt_regs *regs)
a52c8f52 99{
82a9a480
SW		 100 const struct exception_table_entry *entry;
101 unsigned long reason;
a52c8f52 102
82a9a480
SW		 103 if (!rio_regs_win)
104 return 0;
105
106 reason = in_be32((u32 *)(rio_regs_win + RIO_LTLEDCSR));
107 if (reason & (RIO_LTLEDCSR_IER | RIO_LTLEDCSR_PRT)) {
108 /* Check if we are prepared to handle this fault */
109 entry = search_exception_tables(regs->nip);
110 if (entry) {
111 pr_debug("RIO: %s - MC Exception handled\n",
112 __func__);
113 out_be32((u32 *)(rio_regs_win + RIO_LTLEDCSR),
114 0);
115 regs->msr |= MSR_RI;
116 regs->nip = entry->fixup;
117 return 1;
a52c8f52
AB		 118 }
119 }
120
cce1f106 121 return 0;
a52c8f52 122}
cce1f106 123EXPORT_SYMBOL_GPL(fsl_rio_mcheck_exception);
ff33f182 124#endif
a52c8f52 125
2b0c28d7 126/**
d02443a6 127 * fsl_local_config_read - Generate a MPC85xx local config space read
9941d945 128 * @mport: RapidIO master port info
2b0c28d7
MP		 129 * @index: ID of RapdiIO interface
130 * @offset: Offset into configuration space
131 * @len: Length (in bytes) of the maintenance transaction
132 * @data: Value to be read into
133 *
134 * Generates a MPC85xx local configuration space read. Returns %0 on
135 * success or %-EINVAL on failure.
136 */
ad1e9380
ZW		 137static int fsl_local_config_read(struct rio_mport *mport,
138 int index, u32 offset, int len, u32 *data)
2b0c28d7 139{
ad1e9380 140 struct rio_priv *priv = mport->priv;
d02443a6 141 pr_debug("fsl_local_config_read: index %d offset %8.8x\n", index,
abc3aeae 142 offset);
ad1e9380 143 *data = in_be32(priv->regs_win + offset);
2b0c28d7
MP		 144
145 return 0;
146}
147
148/**
d02443a6 149 * fsl_local_config_write - Generate a MPC85xx local config space write
9941d945 150 * @mport: RapidIO master port info
2b0c28d7
MP		 151 * @index: ID of RapdiIO interface
152 * @offset: Offset into configuration space
153 * @len: Length (in bytes) of the maintenance transaction
154 * @data: Value to be written
155 *
156 * Generates a MPC85xx local configuration space write. Returns %0 on
157 * success or %-EINVAL on failure.
158 */
ad1e9380
ZW		 159static int fsl_local_config_write(struct rio_mport *mport,
160 int index, u32 offset, int len, u32 data)
2b0c28d7 161{
ad1e9380 162 struct rio_priv *priv = mport->priv;
2b0c28d7 163 pr_debug
6ec4bedb
LG		 164 ("fsl_local_config_write: index %d offset %8.8x data %8.8x\n",
165 index, offset, data);
ad1e9380 166 out_be32(priv->regs_win + offset, data);
2b0c28d7
MP		 167
168 return 0;
169}
170
171/**
d02443a6 172 * fsl_rio_config_read - Generate a MPC85xx read maintenance transaction
9941d945 173 * @mport: RapidIO master port info
2b0c28d7
MP		 174 * @index: ID of RapdiIO interface
175 * @destid: Destination ID of transaction
176 * @hopcount: Number of hops to target device
177 * @offset: Offset into configuration space
178 * @len: Length (in bytes) of the maintenance transaction
179 * @val: Location to be read into
180 *
181 * Generates a MPC85xx read maintenance transaction. Returns %0 on
182 * success or %-EINVAL on failure.
183 */
184static int
ad1e9380
ZW		 185fsl_rio_config_read(struct rio_mport *mport, int index, u16 destid,
186 u8 hopcount, u32 offset, int len, u32 *val)
2b0c28d7 187{
ad1e9380 188 struct rio_priv *priv = mport->priv;
2b0c28d7 189 u8 *data;
a52c8f52 190 u32 rval, err = 0;
2b0c28d7
MP		 191
192 pr_debug
6ec4bedb
LG		 193 ("fsl_rio_config_read:"
194 " index %d destid %d hopcount %d offset %8.8x len %d\n",
abc3aeae 195 index, destid, hopcount, offset, len);
bd4fb654
TM		 196
197 /* 16MB maintenance window possible */
198 /* allow only aligned access to maintenance registers */
199 if (offset > (0x1000000 - len) || !IS_ALIGNED(offset, len))
200 return -EINVAL;
201
ad1e9380 202 out_be32(&priv->maint_atmu_regs->rowtar,
bd4fb654 203 (destid << 22) | (hopcount << 12) | (offset >> 12));
6ec4bedb 204 out_be32(&priv->maint_atmu_regs->rowtear, (destid >> 10));
2b0c28d7 205
bd4fb654 206 data = (u8 *) priv->maint_win + (offset & (RIO_MAINT_WIN_SIZE - 1));
2b0c28d7
MP		 207 switch (len) {
208 case 1:
a52c8f52 209 __fsl_read_rio_config(rval, data, err, "lbz");
2b0c28d7
MP		 210 break;
211 case 2:
a52c8f52 212 __fsl_read_rio_config(rval, data, err, "lhz");
2b0c28d7 213 break;
bd4fb654 214 case 4:
a52c8f52 215 __fsl_read_rio_config(rval, data, err, "lwz");
2b0c28d7 216 break;
bd4fb654
TM		 217 default:
218 return -EINVAL;
2b0c28d7
MP		 219 }
220
a52c8f52
AB		 221 if (err) {
222 pr_debug("RIO: cfg_read error %d for %x:%x:%x\n",
223 err, destid, hopcount, offset);
224 }
225
226 *val = rval;
227
228 return err;
2b0c28d7
MP		 229}
230
231/**
d02443a6 232 * fsl_rio_config_write - Generate a MPC85xx write maintenance transaction
9941d945 233 * @mport: RapidIO master port info
2b0c28d7
MP		 234 * @index: ID of RapdiIO interface
235 * @destid: Destination ID of transaction
236 * @hopcount: Number of hops to target device
237 * @offset: Offset into configuration space
238 * @len: Length (in bytes) of the maintenance transaction
239 * @val: Value to be written
240 *
241 * Generates an MPC85xx write maintenance transaction. Returns %0 on
242 * success or %-EINVAL on failure.
243 */
244static int
ad1e9380
ZW		 245fsl_rio_config_write(struct rio_mport *mport, int index, u16 destid,
246 u8 hopcount, u32 offset, int len, u32 val)
2b0c28d7 247{
ad1e9380 248 struct rio_priv *priv = mport->priv;
2b0c28d7
MP		 249 u8 *data;
250 pr_debug
6ec4bedb 251 ("fsl_rio_config_write:"
abc3aeae
LG		 252 " index %d destid %d hopcount %d offset %8.8x len %d val %8.8x\n",
253 index, destid, hopcount, offset, len, val);
bd4fb654
TM		 254
255 /* 16MB maintenance windows possible */
256 /* allow only aligned access to maintenance registers */
257 if (offset > (0x1000000 - len) || !IS_ALIGNED(offset, len))
258 return -EINVAL;
259
ad1e9380 260 out_be32(&priv->maint_atmu_regs->rowtar,
bd4fb654 261 (destid << 22) | (hopcount << 12) | (offset >> 12));
6ec4bedb 262 out_be32(&priv->maint_atmu_regs->rowtear, (destid >> 10));
2b0c28d7 263
bd4fb654 264 data = (u8 *) priv->maint_win + (offset & (RIO_MAINT_WIN_SIZE - 1));
2b0c28d7
MP		 265 switch (len) {
266 case 1:
267 out_8((u8 *) data, val);
268 break;
269 case 2:
270 out_be16((u16 *) data, val);
271 break;
bd4fb654 272 case 4:
2b0c28d7
MP		 273 out_be32((u32 *) data, val);
274 break;
bd4fb654
TM		 275 default:
276 return -EINVAL;
2b0c28d7
MP		 277 }
278
279 return 0;
280}
281
e6a546fd
MG		 282static void fsl_rio_inbound_mem_init(struct rio_priv *priv)
283{
284 int i;
285
286 /* close inbound windows */
287 for (i = 0; i < RIO_INB_ATMU_COUNT; i++)
288 out_be32(&priv->inb_atmu_regs[i].riwar, 0);
289}
290
291int fsl_map_inb_mem(struct rio_mport *mport, dma_addr_t lstart,
a057a52e 292 u64 rstart, u64 size, u32 flags)
e6a546fd
MG		 293{
294 struct rio_priv *priv = mport->priv;
295 u32 base_size;
296 unsigned int base_size_log;
297 u64 win_start, win_end;
298 u32 riwar;
299 int i;
300
a057a52e 301 if ((size & (size - 1)) != 0 || size > 0x400000000ULL)
e6a546fd
MG		 302 return -EINVAL;
303
304 base_size_log = ilog2(size);
305 base_size = 1 << base_size_log;
306
307 /* check if addresses are aligned with the window size */
308 if (lstart & (base_size - 1))
309 return -EINVAL;
310 if (rstart & (base_size - 1))
311 return -EINVAL;
312
313 /* check for conflicting ranges */
314 for (i = 0; i < RIO_INB_ATMU_COUNT; i++) {
315 riwar = in_be32(&priv->inb_atmu_regs[i].riwar);
316 if ((riwar & RIWAR_ENABLE) == 0)
317 continue;
318 win_start = ((u64)(in_be32(&priv->inb_atmu_regs[i].riwbar) & RIWBAR_BADD_MASK))
319 << RIWBAR_BADD_VAL_SHIFT;
320 win_end = win_start + ((1 << ((riwar & RIWAR_SIZE_MASK) + 1)) - 1);
321 if (rstart < win_end && (rstart + size) > win_start)
322 return -EINVAL;
323 }
324
325 /* find unused atmu */
326 for (i = 0; i < RIO_INB_ATMU_COUNT; i++) {
327 riwar = in_be32(&priv->inb_atmu_regs[i].riwar);
328 if ((riwar & RIWAR_ENABLE) == 0)
329 break;
330 }
331 if (i >= RIO_INB_ATMU_COUNT)
332 return -ENOMEM;
333
334 out_be32(&priv->inb_atmu_regs[i].riwtar, lstart >> RIWTAR_TRAD_VAL_SHIFT);
335 out_be32(&priv->inb_atmu_regs[i].riwbar, rstart >> RIWBAR_BADD_VAL_SHIFT);
336 out_be32(&priv->inb_atmu_regs[i].riwar, RIWAR_ENABLE | RIWAR_TGINT_LOCAL |
337 RIWAR_RDTYP_SNOOP | RIWAR_WRTYP_SNOOP | (base_size_log - 1));
338
339 return 0;
340}
341
342void fsl_unmap_inb_mem(struct rio_mport *mport, dma_addr_t lstart)
343{
344 u32 win_start_shift, base_start_shift;
345 struct rio_priv *priv = mport->priv;
346 u32 riwar, riwtar;
347 int i;
348
349 /* skip default window */
350 base_start_shift = lstart >> RIWTAR_TRAD_VAL_SHIFT;
351 for (i = 0; i < RIO_INB_ATMU_COUNT; i++) {
352 riwar = in_be32(&priv->inb_atmu_regs[i].riwar);
353 if ((riwar & RIWAR_ENABLE) == 0)
354 continue;
355
356 riwtar = in_be32(&priv->inb_atmu_regs[i].riwtar);
357 win_start_shift = riwtar & RIWTAR_TRAD_MASK;
358 if (win_start_shift == base_start_shift) {
359 out_be32(&priv->inb_atmu_regs[i].riwar, riwar & ~RIWAR_ENABLE);
360 return;
361 }
362 }
363}
364
abc3aeae 365void fsl_rio_port_error_handler(int offset)
6ff31453
SX		 366{
367 /*XXX: Error recovery is not implemented, we just clear errors */
368 out_be32((u32 *)(rio_regs_win + RIO_LTLEDCSR), 0);
369
370 if (offset == 0) {
371 out_be32((u32 *)(rio_regs_win + RIO_PORT1_EDCSR), 0);
671ee7f0 372 out_be32((u32 *)(rio_regs_win + RIO_PORT1_IECSR), IECSR_CLEAR);
6ff31453
SX		 373 out_be32((u32 *)(rio_regs_win + RIO_ESCSR), ESCSR_CLEAR);
374 } else {
375 out_be32((u32 *)(rio_regs_win + RIO_PORT2_EDCSR), 0);
671ee7f0 376 out_be32((u32 *)(rio_regs_win + RIO_PORT2_IECSR), IECSR_CLEAR);
6ff31453
SX		 377 out_be32((u32 *)(rio_regs_win + RIO_PORT2_ESCSR), ESCSR_CLEAR);
378 }
379}
7f620df8
ZW		 380static inline void fsl_rio_info(struct device *dev, u32 ccsr)
381{
382 const char *str;
383 if (ccsr & 1) {
384 /* Serial phy */
385 switch (ccsr >> 30) {
386 case 0:
387 str = "1";
388 break;
389 case 1:
390 str = "4";
391 break;
392 default:
393 str = "Unknown";
d258e64e 394 break;
7f620df8
ZW		 395 }
396 dev_info(dev, "Hardware port width: %s\n", str);
397
398 switch ((ccsr >> 27) & 7) {
399 case 0:
400 str = "Single-lane 0";
401 break;
402 case 1:
403 str = "Single-lane 2";
404 break;
405 case 2:
406 str = "Four-lane";
407 break;
408 default:
409 str = "Unknown";
410 break;
411 }
412 dev_info(dev, "Training connection status: %s\n", str);
413 } else {
414 /* Parallel phy */
415 if (!(ccsr & 0x80000000))
416 dev_info(dev, "Output port operating in 8-bit mode\n");
417 if (!(ccsr & 0x08000000))
418 dev_info(dev, "Input port operating in 8-bit mode\n");
419 }
420}
421
2b0c28d7 422/**
9941d945 423 * fsl_rio_setup - Setup Freescale PowerPC RapidIO interface
2dc11581 424 * @dev: platform_device pointer
2b0c28d7
MP		 425 *
426 * Initializes MPC85xx RapidIO hardware interface, configures
427 * master port with system-specific info, and registers the
428 * master port with the RapidIO subsystem.
429 */
a454dc50 430int fsl_rio_setup(struct platform_device *dev)
2b0c28d7
MP		 431{
432 struct rio_ops *ops;
433 struct rio_mport *port;
cc2bb696
ZW		 434 struct rio_priv *priv;
435 int rc = 0;
abc3aeae
LG		 436 const u32 *dt_range, *cell, *port_index;
437 u32 active_ports = 0;
438 struct resource regs, rmu_regs;
439 struct device_node *np, *rmu_node;
cc2bb696 440 int rlen;
61b26917 441 u32 ccsr;
abc3aeae 442 u64 range_start, range_size;
cc2bb696 443 int paw, aw, sw;
abc3aeae
LG		 444 u32 i;
445 static int tmp;
446 struct device_node *rmu_np[MAX_MSG_UNIT_NUM] = {NULL};
cc2bb696 447
61c7a080 448 if (!dev->dev.of_node) {
cc2bb696 449 dev_err(&dev->dev, "Device OF-Node is NULL");
abc3aeae 450 return -ENODEV;
cc2bb696
ZW		 451 }
452
61c7a080 453 rc = of_address_to_resource(dev->dev.of_node, 0, &regs);
cc2bb696
ZW		 454 if (rc) {
455 dev_err(&dev->dev, "Can't get %s property 'reg'\n",
61c7a080 456 dev->dev.of_node->full_name);
cc2bb696
ZW		 457 return -EFAULT;
458 }
6ec4bedb
LG		 459 dev_info(&dev->dev, "Of-device full name %s\n",
460 dev->dev.of_node->full_name);
fc274a15 461 dev_info(&dev->dev, "Regs: %pR\n", &regs);
cc2bb696 462
abc3aeae
LG		 463 rio_regs_win = ioremap(regs.start, resource_size(&regs));
464 if (!rio_regs_win) {
465 dev_err(&dev->dev, "Unable to map rio register window\n");
466 rc = -ENOMEM;
467 goto err_rio_regs;
cc2bb696
ZW		 468 }
469
e5cabeb3 470 ops = kzalloc(sizeof(struct rio_ops), GFP_KERNEL);
6c75933c
JL		 471 if (!ops) {
472 rc = -ENOMEM;
473 goto err_ops;
474 }
d02443a6
ZW		 475 ops->lcread = fsl_local_config_read;
476 ops->lcwrite = fsl_local_config_write;
477 ops->cread = fsl_rio_config_read;
478 ops->cwrite = fsl_rio_config_write;
abc3aeae 479 ops->dsend = fsl_rio_doorbell_send;
5b2074ae 480 ops->pwenable = fsl_rio_pw_enable;
abc3aeae
LG		 481 ops->open_outb_mbox = fsl_open_outb_mbox;
482 ops->open_inb_mbox = fsl_open_inb_mbox;
483 ops->close_outb_mbox = fsl_close_outb_mbox;
484 ops->close_inb_mbox = fsl_close_inb_mbox;
485 ops->add_outb_message = fsl_add_outb_message;
486 ops->add_inb_buffer = fsl_add_inb_buffer;
487 ops->get_inb_message = fsl_get_inb_message;
e6a546fd
MG		 488 ops->map_inb = fsl_map_inb_mem;
489 ops->unmap_inb = fsl_unmap_inb_mem;
abc3aeae
LG		 490
491 rmu_node = of_parse_phandle(dev->dev.of_node, "fsl,srio-rmu-handle", 0);
a614db9a
SW		 492 if (!rmu_node) {
493 dev_err(&dev->dev, "No valid fsl,srio-rmu-handle property\n");
abc3aeae 494 goto err_rmu;
a614db9a 495 }
abc3aeae
LG		 496 rc = of_address_to_resource(rmu_node, 0, &rmu_regs);
497 if (rc) {
498 dev_err(&dev->dev, "Can't get %s property 'reg'\n",
499 rmu_node->full_name);
500 goto err_rmu;
501 }
502 rmu_regs_win = ioremap(rmu_regs.start, resource_size(&rmu_regs));
503 if (!rmu_regs_win) {
504 dev_err(&dev->dev, "Unable to map rmu register window\n");
6c75933c 505 rc = -ENOMEM;
abc3aeae
LG		 506 goto err_rmu;
507 }
508 for_each_compatible_node(np, NULL, "fsl,srio-msg-unit") {
509 rmu_np[tmp] = np;
510 tmp++;
6c75933c 511 }
ad1e9380 512
abc3aeae
LG		 513 /*set up doobell node*/
514 np = of_find_compatible_node(NULL, NULL, "fsl,srio-dbell-unit");
515 if (!np) {
a614db9a 516 dev_err(&dev->dev, "No fsl,srio-dbell-unit node\n");
abc3aeae
LG		 517 rc = -ENODEV;
518 goto err_dbell;
519 }
520 dbell = kzalloc(sizeof(struct fsl_rio_dbell), GFP_KERNEL);
521 if (!(dbell)) {
522 dev_err(&dev->dev, "Can't alloc memory for 'fsl_rio_dbell'\n");
ad1e9380 523 rc = -ENOMEM;
abc3aeae 524 goto err_dbell;
ad1e9380 525 }
abc3aeae
LG		 526 dbell->dev = &dev->dev;
527 dbell->bellirq = irq_of_parse_and_map(np, 1);
528 dev_info(&dev->dev, "bellirq: %d\n", dbell->bellirq);
ad1e9380 529
abc3aeae
LG		 530 aw = of_n_addr_cells(np);
531 dt_range = of_get_property(np, "reg", &rlen);
532 if (!dt_range) {
533 pr_err("%s: unable to find 'reg' property\n",
534 np->full_name);
535 rc = -ENOMEM;
536 goto err_pw;
537 }
538 range_start = of_read_number(dt_range, aw);
539 dbell->dbell_regs = (struct rio_dbell_regs *)(rmu_regs_win +
540 (u32)range_start);
541
542 /*set up port write node*/
543 np = of_find_compatible_node(NULL, NULL, "fsl,srio-port-write-unit");
544 if (!np) {
a614db9a 545 dev_err(&dev->dev, "No fsl,srio-port-write-unit node\n");
abc3aeae
LG		 546 rc = -ENODEV;
547 goto err_pw;
548 }
549 pw = kzalloc(sizeof(struct fsl_rio_pw), GFP_KERNEL);
550 if (!(pw)) {
551 dev_err(&dev->dev, "Can't alloc memory for 'fsl_rio_pw'\n");
552 rc = -ENOMEM;
553 goto err_pw;
554 }
555 pw->dev = &dev->dev;
556 pw->pwirq = irq_of_parse_and_map(np, 0);
557 dev_info(&dev->dev, "pwirq: %d\n", pw->pwirq);
558 aw = of_n_addr_cells(np);
559 dt_range = of_get_property(np, "reg", &rlen);
560 if (!dt_range) {
561 pr_err("%s: unable to find 'reg' property\n",
562 np->full_name);
563 rc = -ENOMEM;
564 goto err;
c1256ebe 565 }
abc3aeae
LG		 566 range_start = of_read_number(dt_range, aw);
567 pw->pw_regs = (struct rio_pw_regs *)(rmu_regs_win + (u32)range_start);
568
569 /*set up ports node*/
570 for_each_child_of_node(dev->dev.of_node, np) {
571 port_index = of_get_property(np, "cell-index", NULL);
572 if (!port_index) {
573 dev_err(&dev->dev, "Can't get %s property 'cell-index'\n",
574 np->full_name);
575 continue;
576 }
577
578 dt_range = of_get_property(np, "ranges", &rlen);
579 if (!dt_range) {
580 dev_err(&dev->dev, "Can't get %s property 'ranges'\n",
581 np->full_name);
582 continue;
583 }
c1256ebe 584
abc3aeae
LG		 585 /* Get node address wide */
586 cell = of_get_property(np, "#address-cells", NULL);
587 if (cell)
588 aw = *cell;
589 else
590 aw = of_n_addr_cells(np);
591 /* Get node size wide */
592 cell = of_get_property(np, "#size-cells", NULL);
593 if (cell)
594 sw = *cell;
595 else
596 sw = of_n_size_cells(np);
597 /* Get parent address wide wide */
598 paw = of_n_addr_cells(np);
599 range_start = of_read_number(dt_range + aw, paw);
600 range_size = of_read_number(dt_range + aw + paw, sw);
601
602 dev_info(&dev->dev, "%s: LAW start 0x%016llx, size 0x%016llx.\n",
603 np->full_name, range_start, range_size);
604
605 port = kzalloc(sizeof(struct rio_mport), GFP_KERNEL);
606 if (!port)
607 continue;
608
dd64f4fe
AB		 609 rc = rio_mport_initialize(port);
610 if (rc) {
611 kfree(port);
612 continue;
613 }
614
abc3aeae
LG		 615 i = *port_index - 1;
616 port->index = (unsigned char)i;
617
618 priv = kzalloc(sizeof(struct rio_priv), GFP_KERNEL);
619 if (!priv) {
620 dev_err(&dev->dev, "Can't alloc memory for 'priv'\n");
621 kfree(port);
622 continue;
623 }
624
625 INIT_LIST_HEAD(&port->dbells);
626 port->iores.start = range_start;
627 port->iores.end = port->iores.start + range_size - 1;
628 port->iores.flags = IORESOURCE_MEM;
629 port->iores.name = "rio_io_win";
630
631 if (request_resource(&iomem_resource, &port->iores) < 0) {
632 dev_err(&dev->dev, "RIO: Error requesting master port region"
633 " 0x%016llx-0x%016llx\n",
634 (u64)port->iores.start, (u64)port->iores.end);
635 kfree(priv);
636 kfree(port);
637 continue;
638 }
639 sprintf(port->name, "RIO mport %d", i);
640
641 priv->dev = &dev->dev;
2aaf308b 642 port->dev.parent = &dev->dev;
abc3aeae
LG		 643 port->ops = ops;
644 port->priv = priv;
645 port->phys_efptr = 0x100;
646 priv->regs_win = rio_regs_win;
647
648 /* Probe the master port phy type */
649 ccsr = in_be32(priv->regs_win + RIO_CCSR + i*0x20);
650 port->phy_type = (ccsr & 1) ? RIO_PHY_SERIAL : RIO_PHY_PARALLEL;
651 if (port->phy_type == RIO_PHY_PARALLEL) {
652 dev_err(&dev->dev, "RIO: Parallel PHY type, unsupported port type!\n");
653 release_resource(&port->iores);
654 kfree(priv);
655 kfree(port);
656 continue;
657 }
658 dev_info(&dev->dev, "RapidIO PHY type: Serial\n");
659 /* Checking the port training status */
660 if (in_be32((priv->regs_win + RIO_ESCSR + i*0x20)) & 1) {
661 dev_err(&dev->dev, "Port %d is not ready. "
662 "Try to restart connection...\n", i);
7f620df8 663 /* Disable ports */
abc3aeae
LG		 664 out_be32(priv->regs_win
665 + RIO_CCSR + i*0x20, 0);
7f620df8 666 /* Set 1x lane */
abc3aeae
LG		 667 setbits32(priv->regs_win
668 + RIO_CCSR + i*0x20, 0x02000000);
7f620df8 669 /* Enable ports */
abc3aeae
LG		 670 setbits32(priv->regs_win
671 + RIO_CCSR + i*0x20, 0x00600000);
672 msleep(100);
673 if (in_be32((priv->regs_win
674 + RIO_ESCSR + i*0x20)) & 1) {
675 dev_err(&dev->dev,
676 "Port %d restart failed.\n", i);
677 release_resource(&port->iores);
678 kfree(priv);
679 kfree(port);
680 continue;
681 }
682 dev_info(&dev->dev, "Port %d restart success!\n", i);
7f620df8 683 }
abc3aeae 684 fsl_rio_info(&dev->dev, ccsr);
61b26917 685
abc3aeae 686 port->sys_size = (in_be32((priv->regs_win + RIO_PEF_CAR))
e0423236 687 & RIO_PEF_CTLS) >> 4;
abc3aeae
LG		 688 dev_info(&dev->dev, "RapidIO Common Transport System size: %d\n",
689 port->sys_size ? 65536 : 256);
690
abc3aeae
LG		 691 if (port->host_deviceid >= 0)
692 out_be32(priv->regs_win + RIO_GCCSR, RIO_PORT_GEN_HOST |
693 RIO_PORT_GEN_MASTER | RIO_PORT_GEN_DISCOVERED);
694 else
695 out_be32(priv->regs_win + RIO_GCCSR,
696 RIO_PORT_GEN_MASTER);
e0423236 697
abc3aeae
LG		 698 priv->atmu_regs = (struct rio_atmu_regs *)(priv->regs_win
699 + ((i == 0) ? RIO_ATMU_REGS_PORT1_OFFSET :
700 RIO_ATMU_REGS_PORT2_OFFSET));
701
702 priv->maint_atmu_regs = priv->atmu_regs + 1;
e6a546fd
MG		 703 priv->inb_atmu_regs = (struct rio_inb_atmu_regs __iomem *)
704 (priv->regs_win +
705 ((i == 0) ? RIO_INB_ATMU_REGS_PORT1_OFFSET :
706 RIO_INB_ATMU_REGS_PORT2_OFFSET));
707
59f99965 708
abc3aeae
LG		 709 /* Set to receive any dist ID for serial RapidIO controller. */
710 if (port->phy_type == RIO_PHY_SERIAL)
711 out_be32((priv->regs_win
712 + RIO_ISR_AACR + i*0x80), RIO_ISR_AACR_AA);
af84ca38 713
abc3aeae
LG		 714 /* Configure maintenance transaction window */
715 out_be32(&priv->maint_atmu_regs->rowbar,
716 port->iores.start >> 12);
717 out_be32(&priv->maint_atmu_regs->rowar,
718 0x80077000 | (ilog2(RIO_MAINT_WIN_SIZE) - 1));
61b26917 719
abc3aeae
LG		 720 priv->maint_win = ioremap(port->iores.start,
721 RIO_MAINT_WIN_SIZE);
2b0c28d7 722
abc3aeae 723 rio_law_start = range_start;
2b0c28d7 724
abc3aeae 725 fsl_rio_setup_rmu(port, rmu_np[i]);
e6a546fd 726 fsl_rio_inbound_mem_init(priv);
2b0c28d7 727
abc3aeae 728 dbell->mport[i] = port;
9a0b0627 729 pw->mport[i] = port;
abc3aeae 730
dd64f4fe
AB		 731 if (rio_register_mport(port)) {
732 release_resource(&port->iores);
733 kfree(priv);
734 kfree(port);
735 continue;
736 }
abc3aeae
LG		 737 active_ports++;
738 }
739
740 if (!active_ports) {
741 rc = -ENOLINK;
742 goto err;
743 }
6ec4bedb 744
abc3aeae
LG		 745 fsl_rio_doorbell_init(dbell);
746 fsl_rio_port_write_init(pw);
ad1e9380 747
cc2bb696 748 return 0;
ad1e9380 749err:
abc3aeae 750 kfree(pw);
a614db9a 751 pw = NULL;
abc3aeae
LG		 752err_pw:
753 kfree(dbell);
a614db9a 754 dbell = NULL;
abc3aeae
LG		 755err_dbell:
756 iounmap(rmu_regs_win);
a614db9a 757 rmu_regs_win = NULL;
abc3aeae 758err_rmu:
6c75933c
JL		 759 kfree(ops);
760err_ops:
abc3aeae 761 iounmap(rio_regs_win);
a614db9a 762 rio_regs_win = NULL;
abc3aeae 763err_rio_regs:
cc2bb696 764 return rc;
2b0c28d7 765}
cc2bb696
ZW		 766
767/* The probe function for RapidIO peer-to-peer network.
768 */
cad5cef6 769static int fsl_of_rio_rpn_probe(struct platform_device *dev)
cc2bb696 770{
cc2bb696 771 printk(KERN_INFO "Setting up RapidIO peer-to-peer network %s\n",
61c7a080 772 dev->dev.of_node->full_name);
cc2bb696 773
2f809985 774 return fsl_rio_setup(dev);
cc2bb696
ZW		 775};
776
777static const struct of_device_id fsl_of_rio_rpn_ids[] = {
778 {
abc3aeae 779 .compatible = "fsl,srio",
cc2bb696
ZW		 780 },
781 {},
782};
783
00006124 784static struct platform_driver fsl_of_rio_rpn_driver = {
4018294b
GL		 785 .driver = {
786 .name = "fsl-of-rio",
4018294b
GL		 787 .of_match_table = fsl_of_rio_rpn_ids,
788 },
cc2bb696
ZW		 789 .probe = fsl_of_rio_rpn_probe,
790};
791
792static __init int fsl_of_rio_rpn_init(void)
793{
00006124 794 return platform_driver_register(&fsl_of_rio_rpn_driver);
cc2bb696
ZW		 795}
796
797subsys_initcall(fsl_of_rio_rpn_init);
Linux 6.x block layer and io_uring tree(s)