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Kristian Høgsbergc781c062007-05-07 20:33:32 -04001/*
2 * Driver for OHCI 1394 controllers
Kristian Høgsberged568912006-12-19 19:58:35 -05003 *
Kristian Høgsberged568912006-12-19 19:58:35 -05004 * Copyright (C) 2003-2006 Kristian Hoegsberg <krh@bitplanet.net>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software Foundation,
18 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19 */
20
Maxim Levitskydd237362010-11-29 04:09:50 +020021#include <linux/bitops.h>
Stefan Richter65b27422010-06-12 20:26:51 +020022#include <linux/bug.h>
Stefan Richtere524f6162007-08-20 21:58:30 +020023#include <linux/compiler.h>
Kristian Høgsberged568912006-12-19 19:58:35 -050024#include <linux/delay.h>
Stefan Richtere8ca9702009-06-04 21:09:38 +020025#include <linux/device.h>
Andrew Mortoncf3e72f2006-12-27 14:36:37 -080026#include <linux/dma-mapping.h>
Stefan Richter77c9a5d2009-06-05 16:26:18 +020027#include <linux/firewire.h>
Stefan Richtere8ca9702009-06-04 21:09:38 +020028#include <linux/firewire-constants.h>
Stefan Richtera7fb60d2007-08-20 21:41:22 +020029#include <linux/init.h>
30#include <linux/interrupt.h>
Stefan Richtere8ca9702009-06-04 21:09:38 +020031#include <linux/io.h>
Stefan Richtera7fb60d2007-08-20 21:41:22 +020032#include <linux/kernel.h>
Stefan Richtere8ca9702009-06-04 21:09:38 +020033#include <linux/list.h>
Al Virofaa2fb42007-05-15 20:36:10 +010034#include <linux/mm.h>
Stefan Richtera7fb60d2007-08-20 21:41:22 +020035#include <linux/module.h>
Stefan Richterad3c0fe2008-03-20 22:04:36 +010036#include <linux/moduleparam.h>
Stefan Richter02d37be2010-07-08 16:09:06 +020037#include <linux/mutex.h>
Stefan Richtera7fb60d2007-08-20 21:41:22 +020038#include <linux/pci.h>
Stefan Richterfc383792009-08-28 13:25:15 +020039#include <linux/pci_ids.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090040#include <linux/slab.h>
Stefan Richterc26f0232007-08-20 21:40:30 +020041#include <linux/spinlock.h>
Stefan Richtere8ca9702009-06-04 21:09:38 +020042#include <linux/string.h>
Stefan Richtere78483c2010-08-02 09:33:25 +020043#include <linux/time.h>
Clemens Ladisch7a39d8b2010-11-26 08:57:31 +010044#include <linux/vmalloc.h>
Stephan Gatzka2d7a36e2011-07-25 22:16:24 +020045#include <linux/workqueue.h>
Andrew Mortoncf3e72f2006-12-27 14:36:37 -080046
Stefan Richtere8ca9702009-06-04 21:09:38 +020047#include <asm/byteorder.h>
Stefan Richterc26f0232007-08-20 21:40:30 +020048#include <asm/page.h>
Kristian Høgsberged568912006-12-19 19:58:35 -050049
Stefan Richterea8d0062008-03-01 02:42:56 +010050#ifdef CONFIG_PPC_PMAC
51#include <asm/pmac_feature.h>
52#endif
53
Stefan Richter77c9a5d2009-06-05 16:26:18 +020054#include "core.h"
55#include "ohci.h"
Kristian Høgsberged568912006-12-19 19:58:35 -050056
Peter Hurleyde97cb62013-03-26 11:54:06 -040057#define ohci_info(ohci, f, args...) dev_info(ohci->card.device, f, ##args)
58#define ohci_notice(ohci, f, args...) dev_notice(ohci->card.device, f, ##args)
59#define ohci_err(ohci, f, args...) dev_err(ohci->card.device, f, ##args)
60
Kristian Høgsberga77754a2007-05-07 20:33:35 -040061#define DESCRIPTOR_OUTPUT_MORE 0
62#define DESCRIPTOR_OUTPUT_LAST (1 << 12)
63#define DESCRIPTOR_INPUT_MORE (2 << 12)
64#define DESCRIPTOR_INPUT_LAST (3 << 12)
65#define DESCRIPTOR_STATUS (1 << 11)
66#define DESCRIPTOR_KEY_IMMEDIATE (2 << 8)
67#define DESCRIPTOR_PING (1 << 7)
68#define DESCRIPTOR_YY (1 << 6)
69#define DESCRIPTOR_NO_IRQ (0 << 4)
70#define DESCRIPTOR_IRQ_ERROR (1 << 4)
71#define DESCRIPTOR_IRQ_ALWAYS (3 << 4)
72#define DESCRIPTOR_BRANCH_ALWAYS (3 << 2)
73#define DESCRIPTOR_WAIT (3 << 0)
Kristian Høgsberged568912006-12-19 19:58:35 -050074
Andy Leisersonbe8dcab2013-04-24 09:10:32 -070075#define DESCRIPTOR_CMD (0xf << 12)
76
Kristian Høgsberged568912006-12-19 19:58:35 -050077struct descriptor {
78 __le16 req_count;
79 __le16 control;
80 __le32 data_address;
81 __le32 branch_address;
82 __le16 res_count;
83 __le16 transfer_status;
84} __attribute__((aligned(16)));
85
Kristian Høgsberga77754a2007-05-07 20:33:35 -040086#define CONTROL_SET(regs) (regs)
87#define CONTROL_CLEAR(regs) ((regs) + 4)
88#define COMMAND_PTR(regs) ((regs) + 12)
89#define CONTEXT_MATCH(regs) ((regs) + 16)
Kristian Høgsberg72e318e2007-02-06 14:49:31 -050090
Clemens Ladisch7a39d8b2010-11-26 08:57:31 +010091#define AR_BUFFER_SIZE (32*1024)
92#define AR_BUFFERS_MIN DIV_ROUND_UP(AR_BUFFER_SIZE, PAGE_SIZE)
93/* we need at least two pages for proper list management */
94#define AR_BUFFERS (AR_BUFFERS_MIN >= 2 ? AR_BUFFERS_MIN : 2)
95
96#define MAX_ASYNC_PAYLOAD 4096
97#define MAX_AR_PACKET_SIZE (16 + MAX_ASYNC_PAYLOAD + 4)
98#define AR_WRAPAROUND_PAGES DIV_ROUND_UP(MAX_AR_PACKET_SIZE, PAGE_SIZE)
Kristian Høgsberg32b46092007-02-06 14:49:30 -050099
Kristian Høgsberged568912006-12-19 19:58:35 -0500100struct ar_context {
101 struct fw_ohci *ohci;
Clemens Ladisch7a39d8b2010-11-26 08:57:31 +0100102 struct page *pages[AR_BUFFERS];
103 void *buffer;
104 struct descriptor *descriptors;
105 dma_addr_t descriptors_bus;
Kristian Høgsberg32b46092007-02-06 14:49:30 -0500106 void *pointer;
Clemens Ladisch7a39d8b2010-11-26 08:57:31 +0100107 unsigned int last_buffer_index;
Kristian Høgsberg72e318e2007-02-06 14:49:31 -0500108 u32 regs;
Kristian Høgsberged568912006-12-19 19:58:35 -0500109 struct tasklet_struct tasklet;
110};
111
Kristian Høgsberg30200732007-02-16 17:34:39 -0500112struct context;
113
114typedef int (*descriptor_callback_t)(struct context *ctx,
115 struct descriptor *d,
116 struct descriptor *last);
David Moorefe5ca632008-01-06 17:21:41 -0500117
118/*
119 * A buffer that contains a block of DMA-able coherent memory used for
120 * storing a portion of a DMA descriptor program.
121 */
122struct descriptor_buffer {
123 struct list_head list;
124 dma_addr_t buffer_bus;
125 size_t buffer_size;
126 size_t used;
127 struct descriptor buffer[0];
128};
129
Kristian Høgsberg30200732007-02-16 17:34:39 -0500130struct context {
Stefan Richter373b2ed2007-03-04 14:45:18 +0100131 struct fw_ohci *ohci;
Kristian Høgsberg30200732007-02-16 17:34:39 -0500132 u32 regs;
David Moorefe5ca632008-01-06 17:21:41 -0500133 int total_allocation;
Clemens Ladischa572e682011-10-15 23:12:23 +0200134 u32 current_bus;
Clemens Ladisch386a4152010-12-24 14:42:46 +0100135 bool running;
Clemens Ladisch82b662d2010-12-24 14:40:15 +0100136 bool flushing;
Stefan Richter373b2ed2007-03-04 14:45:18 +0100137
David Moorefe5ca632008-01-06 17:21:41 -0500138 /*
139 * List of page-sized buffers for storing DMA descriptors.
140 * Head of list contains buffers in use and tail of list contains
141 * free buffers.
142 */
143 struct list_head buffer_list;
144
145 /*
146 * Pointer to a buffer inside buffer_list that contains the tail
147 * end of the current DMA program.
148 */
149 struct descriptor_buffer *buffer_tail;
150
151 /*
152 * The descriptor containing the branch address of the first
153 * descriptor that has not yet been filled by the device.
154 */
155 struct descriptor *last;
156
157 /*
Andy Leisersonbe8dcab2013-04-24 09:10:32 -0700158 * The last descriptor block in the DMA program. It contains the branch
David Moorefe5ca632008-01-06 17:21:41 -0500159 * address that must be updated upon appending a new descriptor.
160 */
161 struct descriptor *prev;
Andy Leisersonbe8dcab2013-04-24 09:10:32 -0700162 int prev_z;
Kristian Høgsberg30200732007-02-16 17:34:39 -0500163
164 descriptor_callback_t callback;
165
Stefan Richter373b2ed2007-03-04 14:45:18 +0100166 struct tasklet_struct tasklet;
Kristian Høgsberg30200732007-02-16 17:34:39 -0500167};
Kristian Høgsberg30200732007-02-16 17:34:39 -0500168
Kristian Høgsberga77754a2007-05-07 20:33:35 -0400169#define IT_HEADER_SY(v) ((v) << 0)
170#define IT_HEADER_TCODE(v) ((v) << 4)
171#define IT_HEADER_CHANNEL(v) ((v) << 8)
172#define IT_HEADER_TAG(v) ((v) << 14)
173#define IT_HEADER_SPEED(v) ((v) << 16)
174#define IT_HEADER_DATA_LENGTH(v) ((v) << 16)
Kristian Høgsberged568912006-12-19 19:58:35 -0500175
176struct iso_context {
177 struct fw_iso_context base;
Kristian Høgsberg30200732007-02-16 17:34:39 -0500178 struct context context;
Kristian Høgsberg9b32d5f2007-02-16 17:34:44 -0500179 void *header;
180 size_t header_length;
Clemens Ladischd1bbd202012-03-18 19:06:39 +0100181 unsigned long flushing_completions;
182 u32 mc_buffer_bus;
183 u16 mc_completed;
Clemens Ladisch910e76c2012-03-18 19:04:43 +0100184 u16 last_timestamp;
Maxim Levitskydd237362010-11-29 04:09:50 +0200185 u8 sync;
186 u8 tags;
Kristian Høgsberged568912006-12-19 19:58:35 -0500187};
188
189#define CONFIG_ROM_SIZE 1024
190
191struct fw_ohci {
192 struct fw_card card;
193
194 __iomem char *registers;
Kristian Høgsberge636fe22007-01-26 00:38:04 -0500195 int node_id;
Kristian Høgsberged568912006-12-19 19:58:35 -0500196 int generation;
Stefan Richtere09770d2008-03-11 02:23:29 +0100197 int request_generation; /* for timestamping incoming requests */
Stefan Richter4a635592010-02-21 17:58:01 +0100198 unsigned quirks;
Clemens Ladischa1a11322010-06-10 08:35:06 +0200199 unsigned int pri_req_max;
Clemens Ladischa48777e2010-06-10 08:33:07 +0200200 u32 bus_time;
Clemens Ladisch9d60ef22012-05-24 19:29:19 +0200201 bool bus_time_running;
Clemens Ladisch4ffb7a62010-06-10 08:36:37 +0200202 bool is_root;
Stefan Richterc8a94de2010-06-12 20:34:50 +0200203 bool csr_state_setclear_abdicate;
Maxim Levitskydd237362010-11-29 04:09:50 +0200204 int n_ir;
205 int n_it;
Kristian Høgsbergc781c062007-05-07 20:33:32 -0400206 /*
207 * Spinlock for accessing fw_ohci data. Never call out of
208 * this driver with this lock held.
209 */
Kristian Høgsberged568912006-12-19 19:58:35 -0500210 spinlock_t lock;
Kristian Høgsberged568912006-12-19 19:58:35 -0500211
Stefan Richter02d37be2010-07-08 16:09:06 +0200212 struct mutex phy_reg_mutex;
213
Clemens Ladischec766a72010-11-30 08:25:17 +0100214 void *misc_buffer;
215 dma_addr_t misc_buffer_bus;
216
Kristian Høgsberged568912006-12-19 19:58:35 -0500217 struct ar_context ar_request_ctx;
218 struct ar_context ar_response_ctx;
Kristian Høgsbergf319b6a2007-03-07 12:12:49 -0500219 struct context at_request_ctx;
220 struct context at_response_ctx;
Kristian Høgsberged568912006-12-19 19:58:35 -0500221
Clemens Ladischf117a3e2011-01-10 17:21:35 +0100222 u32 it_context_support;
Stefan Richter872e3302010-07-29 18:19:22 +0200223 u32 it_context_mask; /* unoccupied IT contexts */
Kristian Høgsberged568912006-12-19 19:58:35 -0500224 struct iso_context *it_context_list;
Stefan Richter872e3302010-07-29 18:19:22 +0200225 u64 ir_context_channels; /* unoccupied channels */
Clemens Ladischf117a3e2011-01-10 17:21:35 +0100226 u32 ir_context_support;
Stefan Richter872e3302010-07-29 18:19:22 +0200227 u32 ir_context_mask; /* unoccupied IR contexts */
Kristian Høgsberged568912006-12-19 19:58:35 -0500228 struct iso_context *ir_context_list;
Stefan Richter872e3302010-07-29 18:19:22 +0200229 u64 mc_channels; /* channels in use by the multichannel IR context */
230 bool mc_allocated;
Stefan Richterecb1cf92010-02-21 17:57:32 +0100231
232 __be32 *config_rom;
233 dma_addr_t config_rom_bus;
234 __be32 *next_config_rom;
235 dma_addr_t next_config_rom_bus;
236 __be32 next_header;
237
Stefan Richteraf531222013-08-05 15:10:38 +0200238 __le32 *self_id;
Stefan Richterecb1cf92010-02-21 17:57:32 +0100239 dma_addr_t self_id_bus;
Stephan Gatzka2d7a36e2011-07-25 22:16:24 +0200240 struct work_struct bus_reset_work;
Stefan Richterecb1cf92010-02-21 17:57:32 +0100241
242 u32 self_id_buffer[512];
Kristian Høgsberged568912006-12-19 19:58:35 -0500243};
244
Stephan Gatzkadb9ae8f2013-08-26 20:50:05 +0200245static struct workqueue_struct *selfid_workqueue;
246
Adrian Bunk95688e92007-01-22 19:17:37 +0100247static inline struct fw_ohci *fw_ohci(struct fw_card *card)
Kristian Høgsberged568912006-12-19 19:58:35 -0500248{
249 return container_of(card, struct fw_ohci, card);
250}
251
Kristian Høgsberg295e3fe2007-02-16 17:34:40 -0500252#define IT_CONTEXT_CYCLE_MATCH_ENABLE 0x80000000
253#define IR_CONTEXT_BUFFER_FILL 0x80000000
254#define IR_CONTEXT_ISOCH_HEADER 0x40000000
255#define IR_CONTEXT_CYCLE_MATCH_ENABLE 0x20000000
256#define IR_CONTEXT_MULTI_CHANNEL_MODE 0x10000000
257#define IR_CONTEXT_DUAL_BUFFER_MODE 0x08000000
Kristian Høgsberged568912006-12-19 19:58:35 -0500258
259#define CONTEXT_RUN 0x8000
260#define CONTEXT_WAKE 0x1000
261#define CONTEXT_DEAD 0x0800
262#define CONTEXT_ACTIVE 0x0400
263
Stefan Richter8b7b6af2009-01-20 19:10:58 +0100264#define OHCI1394_MAX_AT_REQ_RETRIES 0xf
Kristian Høgsberged568912006-12-19 19:58:35 -0500265#define OHCI1394_MAX_AT_RESP_RETRIES 0x2
266#define OHCI1394_MAX_PHYS_RESP_RETRIES 0x8
267
Kristian Høgsberged568912006-12-19 19:58:35 -0500268#define OHCI1394_REGISTER_SIZE 0x800
Kristian Høgsberged568912006-12-19 19:58:35 -0500269#define OHCI1394_PCI_HCI_Control 0x40
270#define SELF_ID_BUF_SIZE 0x800
Kristian Høgsberg32b46092007-02-06 14:49:30 -0500271#define OHCI_TCODE_PHY_PACKET 0x0e
Kristian Høgsberge364cf42007-02-16 17:34:49 -0500272#define OHCI_VERSION_1_1 0x010010
Kristian Høgsberg0edeefd2007-01-26 00:38:49 -0500273
Kristian Høgsberged568912006-12-19 19:58:35 -0500274static char ohci_driver_name[] = KBUILD_MODNAME;
275
Stefan Richter0dbe15f2013-08-05 15:14:36 +0200276#define PCI_VENDOR_ID_PINNACLE_SYSTEMS 0x11bd
Stefan Richter9993e0f2010-12-07 20:32:40 +0100277#define PCI_DEVICE_ID_AGERE_FW643 0x5901
Clemens Ladischd1bb3992012-01-26 22:05:58 +0100278#define PCI_DEVICE_ID_CREATIVE_SB1394 0x4001
Clemens Ladisch262444e2010-06-05 12:31:25 +0200279#define PCI_DEVICE_ID_JMICRON_JMB38X_FW 0x2380
Clemens Ladisch8301b912010-03-17 11:07:55 +0100280#define PCI_DEVICE_ID_TI_TSB12LV22 0x8009
Stephan Gatzka25935eb2011-09-12 22:23:53 +0200281#define PCI_DEVICE_ID_TI_TSB12LV26 0x8020
282#define PCI_DEVICE_ID_TI_TSB82AA2 0x8025
Andy Leisersonbe8dcab2013-04-24 09:10:32 -0700283#define PCI_DEVICE_ID_VIA_VT630X 0x3044
Andy Leisersonbe8dcab2013-04-24 09:10:32 -0700284#define PCI_REV_ID_VIA_VT6306 0x46
Clemens Ladisch8301b912010-03-17 11:07:55 +0100285
Stefan Richter0dbe15f2013-08-05 15:14:36 +0200286#define QUIRK_CYCLE_TIMER 0x1
287#define QUIRK_RESET_PACKET 0x2
288#define QUIRK_BE_HEADERS 0x4
289#define QUIRK_NO_1394A 0x8
290#define QUIRK_NO_MSI 0x10
291#define QUIRK_TI_SLLZ059 0x20
292#define QUIRK_IR_WAKE 0x40
Stefan Richter4a635592010-02-21 17:58:01 +0100293
294/* In case of multiple matches in ohci_quirks[], only the first one is used. */
295static const struct {
Stefan Richter9993e0f2010-12-07 20:32:40 +0100296 unsigned short vendor, device, revision, flags;
Stefan Richter4a635592010-02-21 17:58:01 +0100297} ohci_quirks[] = {
Stefan Richter9993e0f2010-12-07 20:32:40 +0100298 {PCI_VENDOR_ID_AL, PCI_ANY_ID, PCI_ANY_ID,
299 QUIRK_CYCLE_TIMER},
300
301 {PCI_VENDOR_ID_APPLE, PCI_DEVICE_ID_APPLE_UNI_N_FW, PCI_ANY_ID,
302 QUIRK_BE_HEADERS},
303
304 {PCI_VENDOR_ID_ATT, PCI_DEVICE_ID_AGERE_FW643, 6,
Stefan Richter0ca49342014-03-06 20:39:04 +0100305 QUIRK_NO_MSI},
Stefan Richter9993e0f2010-12-07 20:32:40 +0100306
Clemens Ladischd1bb3992012-01-26 22:05:58 +0100307 {PCI_VENDOR_ID_CREATIVE, PCI_DEVICE_ID_CREATIVE_SB1394, PCI_ANY_ID,
308 QUIRK_RESET_PACKET},
309
Stefan Richter9993e0f2010-12-07 20:32:40 +0100310 {PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB38X_FW, PCI_ANY_ID,
311 QUIRK_NO_MSI},
312
313 {PCI_VENDOR_ID_NEC, PCI_ANY_ID, PCI_ANY_ID,
314 QUIRK_CYCLE_TIMER},
315
Ming Leif39aa302011-08-31 10:45:46 +0800316 {PCI_VENDOR_ID_O2, PCI_ANY_ID, PCI_ANY_ID,
317 QUIRK_NO_MSI},
318
Stefan Richter9993e0f2010-12-07 20:32:40 +0100319 {PCI_VENDOR_ID_RICOH, PCI_ANY_ID, PCI_ANY_ID,
Stefan Richter320cfa62012-01-29 12:41:15 +0100320 QUIRK_CYCLE_TIMER | QUIRK_NO_MSI},
Stefan Richter9993e0f2010-12-07 20:32:40 +0100321
322 {PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_TSB12LV22, PCI_ANY_ID,
323 QUIRK_CYCLE_TIMER | QUIRK_RESET_PACKET | QUIRK_NO_1394A},
324
Stephan Gatzka25935eb2011-09-12 22:23:53 +0200325 {PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_TSB12LV26, PCI_ANY_ID,
326 QUIRK_RESET_PACKET | QUIRK_TI_SLLZ059},
327
328 {PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_TSB82AA2, PCI_ANY_ID,
329 QUIRK_RESET_PACKET | QUIRK_TI_SLLZ059},
330
Stefan Richter9993e0f2010-12-07 20:32:40 +0100331 {PCI_VENDOR_ID_TI, PCI_ANY_ID, PCI_ANY_ID,
332 QUIRK_RESET_PACKET},
333
Andy Leisersonbe8dcab2013-04-24 09:10:32 -0700334 {PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_VT630X, PCI_REV_ID_VIA_VT6306,
335 QUIRK_CYCLE_TIMER | QUIRK_IR_WAKE},
336
Stefan Richter9993e0f2010-12-07 20:32:40 +0100337 {PCI_VENDOR_ID_VIA, PCI_ANY_ID, PCI_ANY_ID,
338 QUIRK_CYCLE_TIMER | QUIRK_NO_MSI},
Stefan Richter4a635592010-02-21 17:58:01 +0100339};
340
Stefan Richter3e9cc2f2010-02-21 17:58:29 +0100341/* This overrides anything that was found in ohci_quirks[]. */
342static int param_quirks;
343module_param_named(quirks, param_quirks, int, 0644);
344MODULE_PARM_DESC(quirks, "Chip quirks (default = 0"
345 ", nonatomic cycle timer = " __stringify(QUIRK_CYCLE_TIMER)
346 ", reset packet generation = " __stringify(QUIRK_RESET_PACKET)
Masanari Iida8a168ca2012-12-29 02:00:09 +0900347 ", AR/selfID endianness = " __stringify(QUIRK_BE_HEADERS)
Clemens Ladisch925e7a62010-04-04 15:19:54 +0200348 ", no 1394a enhancements = " __stringify(QUIRK_NO_1394A)
Clemens Ladisch262444e2010-06-05 12:31:25 +0200349 ", disable MSI = " __stringify(QUIRK_NO_MSI)
Stefan Richter28897fb2011-09-19 00:17:37 +0200350 ", TI SLLZ059 erratum = " __stringify(QUIRK_TI_SLLZ059)
Andy Leisersonbe8dcab2013-04-24 09:10:32 -0700351 ", IR wake unreliable = " __stringify(QUIRK_IR_WAKE)
Stefan Richter3e9cc2f2010-02-21 17:58:29 +0100352 ")");
353
Stefan Richtera007bb82008-04-07 22:33:35 +0200354#define OHCI_PARAM_DEBUG_AT_AR 1
Stefan Richterad3c0fe2008-03-20 22:04:36 +0100355#define OHCI_PARAM_DEBUG_SELFIDS 2
Stefan Richtera007bb82008-04-07 22:33:35 +0200356#define OHCI_PARAM_DEBUG_IRQS 4
357#define OHCI_PARAM_DEBUG_BUSRESETS 8 /* only effective before chip init */
Stefan Richterad3c0fe2008-03-20 22:04:36 +0100358
359static int param_debug;
360module_param_named(debug, param_debug, int, 0644);
361MODULE_PARM_DESC(debug, "Verbose logging (default = 0"
Stefan Richterad3c0fe2008-03-20 22:04:36 +0100362 ", AT/AR events = " __stringify(OHCI_PARAM_DEBUG_AT_AR)
Stefan Richtera007bb82008-04-07 22:33:35 +0200363 ", self-IDs = " __stringify(OHCI_PARAM_DEBUG_SELFIDS)
364 ", IRQs = " __stringify(OHCI_PARAM_DEBUG_IRQS)
365 ", busReset events = " __stringify(OHCI_PARAM_DEBUG_BUSRESETS)
Stefan Richterad3c0fe2008-03-20 22:04:36 +0100366 ", or a combination, or all = -1)");
367
Lubomir Rintel8bc588e2013-12-22 11:34:22 +0100368static bool param_remote_dma;
369module_param_named(remote_dma, param_remote_dma, bool, 0444);
370MODULE_PARM_DESC(remote_dma, "Enable unfiltered remote DMA (default = N)");
371
Stefan Richter64d21722011-12-20 21:32:46 +0100372static void log_irqs(struct fw_ohci *ohci, u32 evt)
Stefan Richterad3c0fe2008-03-20 22:04:36 +0100373{
Stefan Richtera007bb82008-04-07 22:33:35 +0200374 if (likely(!(param_debug &
375 (OHCI_PARAM_DEBUG_IRQS | OHCI_PARAM_DEBUG_BUSRESETS))))
Stefan Richterad3c0fe2008-03-20 22:04:36 +0100376 return;
377
Stefan Richtera007bb82008-04-07 22:33:35 +0200378 if (!(param_debug & OHCI_PARAM_DEBUG_IRQS) &&
379 !(evt & OHCI1394_busReset))
380 return;
381
Peter Hurleyde97cb62013-03-26 11:54:06 -0400382 ohci_notice(ohci, "IRQ %08x%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n", evt,
Stefan Richter161b96e2008-06-14 14:23:43 +0200383 evt & OHCI1394_selfIDComplete ? " selfID" : "",
384 evt & OHCI1394_RQPkt ? " AR_req" : "",
385 evt & OHCI1394_RSPkt ? " AR_resp" : "",
386 evt & OHCI1394_reqTxComplete ? " AT_req" : "",
387 evt & OHCI1394_respTxComplete ? " AT_resp" : "",
388 evt & OHCI1394_isochRx ? " IR" : "",
389 evt & OHCI1394_isochTx ? " IT" : "",
390 evt & OHCI1394_postedWriteErr ? " postedWriteErr" : "",
391 evt & OHCI1394_cycleTooLong ? " cycleTooLong" : "",
Clemens Ladischa48777e2010-06-10 08:33:07 +0200392 evt & OHCI1394_cycle64Seconds ? " cycle64Seconds" : "",
Jay Fenlason5ed1f322009-11-17 12:29:17 -0500393 evt & OHCI1394_cycleInconsistent ? " cycleInconsistent" : "",
Stefan Richter161b96e2008-06-14 14:23:43 +0200394 evt & OHCI1394_regAccessFail ? " regAccessFail" : "",
Clemens Ladischf117a3e2011-01-10 17:21:35 +0100395 evt & OHCI1394_unrecoverableError ? " unrecoverableError" : "",
Stefan Richter161b96e2008-06-14 14:23:43 +0200396 evt & OHCI1394_busReset ? " busReset" : "",
397 evt & ~(OHCI1394_selfIDComplete | OHCI1394_RQPkt |
398 OHCI1394_RSPkt | OHCI1394_reqTxComplete |
399 OHCI1394_respTxComplete | OHCI1394_isochRx |
400 OHCI1394_isochTx | OHCI1394_postedWriteErr |
Clemens Ladischa48777e2010-06-10 08:33:07 +0200401 OHCI1394_cycleTooLong | OHCI1394_cycle64Seconds |
402 OHCI1394_cycleInconsistent |
Stefan Richter161b96e2008-06-14 14:23:43 +0200403 OHCI1394_regAccessFail | OHCI1394_busReset)
Stefan Richterad3c0fe2008-03-20 22:04:36 +0100404 ? " ?" : "");
405}
406
407static const char *speed[] = {
408 [0] = "S100", [1] = "S200", [2] = "S400", [3] = "beta",
409};
410static const char *power[] = {
411 [0] = "+0W", [1] = "+15W", [2] = "+30W", [3] = "+45W",
412 [4] = "-3W", [5] = " ?W", [6] = "-3..-6W", [7] = "-3..-10W",
413};
414static const char port[] = { '.', '-', 'p', 'c', };
415
416static char _p(u32 *s, int shift)
417{
418 return port[*s >> shift & 3];
419}
420
Stefan Richter64d21722011-12-20 21:32:46 +0100421static void log_selfids(struct fw_ohci *ohci, int generation, int self_id_count)
Stefan Richterad3c0fe2008-03-20 22:04:36 +0100422{
Stefan Richter64d21722011-12-20 21:32:46 +0100423 u32 *s;
424
Stefan Richterad3c0fe2008-03-20 22:04:36 +0100425 if (likely(!(param_debug & OHCI_PARAM_DEBUG_SELFIDS)))
426 return;
427
Peter Hurleyde97cb62013-03-26 11:54:06 -0400428 ohci_notice(ohci, "%d selfIDs, generation %d, local node ID %04x\n",
429 self_id_count, generation, ohci->node_id);
Stefan Richterad3c0fe2008-03-20 22:04:36 +0100430
Stefan Richter64d21722011-12-20 21:32:46 +0100431 for (s = ohci->self_id_buffer; self_id_count--; ++s)
Stefan Richterad3c0fe2008-03-20 22:04:36 +0100432 if ((*s & 1 << 23) == 0)
Peter Hurleyde97cb62013-03-26 11:54:06 -0400433 ohci_notice(ohci,
434 "selfID 0: %08x, phy %d [%c%c%c] %s gc=%d %s %s%s%s\n",
Stefan Richter161b96e2008-06-14 14:23:43 +0200435 *s, *s >> 24 & 63, _p(s, 6), _p(s, 4), _p(s, 2),
436 speed[*s >> 14 & 3], *s >> 16 & 63,
437 power[*s >> 8 & 7], *s >> 22 & 1 ? "L" : "",
438 *s >> 11 & 1 ? "c" : "", *s & 2 ? "i" : "");
Stefan Richterad3c0fe2008-03-20 22:04:36 +0100439 else
Peter Hurleyde97cb62013-03-26 11:54:06 -0400440 ohci_notice(ohci,
Stefan Richter64d21722011-12-20 21:32:46 +0100441 "selfID n: %08x, phy %d [%c%c%c%c%c%c%c%c]\n",
Stefan Richter161b96e2008-06-14 14:23:43 +0200442 *s, *s >> 24 & 63,
443 _p(s, 16), _p(s, 14), _p(s, 12), _p(s, 10),
444 _p(s, 8), _p(s, 6), _p(s, 4), _p(s, 2));
Stefan Richterad3c0fe2008-03-20 22:04:36 +0100445}
446
447static const char *evts[] = {
448 [0x00] = "evt_no_status", [0x01] = "-reserved-",
449 [0x02] = "evt_long_packet", [0x03] = "evt_missing_ack",
450 [0x04] = "evt_underrun", [0x05] = "evt_overrun",
451 [0x06] = "evt_descriptor_read", [0x07] = "evt_data_read",
452 [0x08] = "evt_data_write", [0x09] = "evt_bus_reset",
453 [0x0a] = "evt_timeout", [0x0b] = "evt_tcode_err",
454 [0x0c] = "-reserved-", [0x0d] = "-reserved-",
455 [0x0e] = "evt_unknown", [0x0f] = "evt_flushed",
456 [0x10] = "-reserved-", [0x11] = "ack_complete",
457 [0x12] = "ack_pending ", [0x13] = "-reserved-",
458 [0x14] = "ack_busy_X", [0x15] = "ack_busy_A",
459 [0x16] = "ack_busy_B", [0x17] = "-reserved-",
460 [0x18] = "-reserved-", [0x19] = "-reserved-",
461 [0x1a] = "-reserved-", [0x1b] = "ack_tardy",
462 [0x1c] = "-reserved-", [0x1d] = "ack_data_error",
463 [0x1e] = "ack_type_error", [0x1f] = "-reserved-",
464 [0x20] = "pending/cancelled",
465};
466static const char *tcodes[] = {
467 [0x0] = "QW req", [0x1] = "BW req",
468 [0x2] = "W resp", [0x3] = "-reserved-",
469 [0x4] = "QR req", [0x5] = "BR req",
470 [0x6] = "QR resp", [0x7] = "BR resp",
471 [0x8] = "cycle start", [0x9] = "Lk req",
472 [0xa] = "async stream packet", [0xb] = "Lk resp",
473 [0xc] = "-reserved-", [0xd] = "-reserved-",
474 [0xe] = "link internal", [0xf] = "-reserved-",
475};
Stefan Richterad3c0fe2008-03-20 22:04:36 +0100476
Stefan Richter64d21722011-12-20 21:32:46 +0100477static void log_ar_at_event(struct fw_ohci *ohci,
478 char dir, int speed, u32 *header, int evt)
Stefan Richterad3c0fe2008-03-20 22:04:36 +0100479{
480 int tcode = header[0] >> 4 & 0xf;
481 char specific[12];
482
483 if (likely(!(param_debug & OHCI_PARAM_DEBUG_AT_AR)))
484 return;
485
486 if (unlikely(evt >= ARRAY_SIZE(evts)))
487 evt = 0x1f;
488
Stefan Richter08ddb2f2008-04-11 00:51:15 +0200489 if (evt == OHCI1394_evt_bus_reset) {
Peter Hurleyde97cb62013-03-26 11:54:06 -0400490 ohci_notice(ohci, "A%c evt_bus_reset, generation %d\n",
491 dir, (header[2] >> 16) & 0xff);
Stefan Richter08ddb2f2008-04-11 00:51:15 +0200492 return;
493 }
494
Stefan Richterad3c0fe2008-03-20 22:04:36 +0100495 switch (tcode) {
496 case 0x0: case 0x6: case 0x8:
497 snprintf(specific, sizeof(specific), " = %08x",
498 be32_to_cpu((__force __be32)header[3]));
499 break;
500 case 0x1: case 0x5: case 0x7: case 0x9: case 0xb:
501 snprintf(specific, sizeof(specific), " %x,%x",
502 header[3] >> 16, header[3] & 0xffff);
503 break;
504 default:
505 specific[0] = '\0';
506 }
507
508 switch (tcode) {
Clemens Ladisch5b06db12010-11-30 08:24:47 +0100509 case 0xa:
Peter Hurleyde97cb62013-03-26 11:54:06 -0400510 ohci_notice(ohci, "A%c %s, %s\n",
511 dir, evts[evt], tcodes[tcode]);
Stefan Richterad3c0fe2008-03-20 22:04:36 +0100512 break;
Clemens Ladisch5b06db12010-11-30 08:24:47 +0100513 case 0xe:
Peter Hurleyde97cb62013-03-26 11:54:06 -0400514 ohci_notice(ohci, "A%c %s, PHY %08x %08x\n",
515 dir, evts[evt], header[1], header[2]);
Clemens Ladisch5b06db12010-11-30 08:24:47 +0100516 break;
Stefan Richterad3c0fe2008-03-20 22:04:36 +0100517 case 0x0: case 0x1: case 0x4: case 0x5: case 0x9:
Peter Hurleyde97cb62013-03-26 11:54:06 -0400518 ohci_notice(ohci,
519 "A%c spd %x tl %02x, %04x -> %04x, %s, %s, %04x%08x%s\n",
520 dir, speed, header[0] >> 10 & 0x3f,
521 header[1] >> 16, header[0] >> 16, evts[evt],
522 tcodes[tcode], header[1] & 0xffff, header[2], specific);
Stefan Richterad3c0fe2008-03-20 22:04:36 +0100523 break;
524 default:
Peter Hurleyde97cb62013-03-26 11:54:06 -0400525 ohci_notice(ohci,
526 "A%c spd %x tl %02x, %04x -> %04x, %s, %s%s\n",
527 dir, speed, header[0] >> 10 & 0x3f,
528 header[1] >> 16, header[0] >> 16, evts[evt],
529 tcodes[tcode], specific);
Stefan Richterad3c0fe2008-03-20 22:04:36 +0100530 }
531}
532
Adrian Bunk95688e92007-01-22 19:17:37 +0100533static inline void reg_write(const struct fw_ohci *ohci, int offset, u32 data)
Kristian Høgsberged568912006-12-19 19:58:35 -0500534{
535 writel(data, ohci->registers + offset);
536}
537
Adrian Bunk95688e92007-01-22 19:17:37 +0100538static inline u32 reg_read(const struct fw_ohci *ohci, int offset)
Kristian Høgsberged568912006-12-19 19:58:35 -0500539{
540 return readl(ohci->registers + offset);
541}
542
Adrian Bunk95688e92007-01-22 19:17:37 +0100543static inline void flush_writes(const struct fw_ohci *ohci)
Kristian Høgsberged568912006-12-19 19:58:35 -0500544{
545 /* Do a dummy read to flush writes. */
546 reg_read(ohci, OHCI1394_Version);
547}
548
Stefan Richterb14c3692011-06-21 15:24:26 +0200549/*
550 * Beware! read_phy_reg(), write_phy_reg(), update_phy_reg(), and
551 * read_paged_phy_reg() require the caller to hold ohci->phy_reg_mutex.
552 * In other words, only use ohci_read_phy_reg() and ohci_update_phy_reg()
553 * directly. Exceptions are intrinsically serialized contexts like pci_probe.
554 */
Stefan Richter35d999b2010-04-10 16:04:56 +0200555static int read_phy_reg(struct fw_ohci *ohci, int addr)
Kristian Høgsberged568912006-12-19 19:58:35 -0500556{
Clemens Ladisch4a96b4f2010-04-04 15:19:52 +0200557 u32 val;
Stefan Richter35d999b2010-04-10 16:04:56 +0200558 int i;
Kristian Høgsberged568912006-12-19 19:58:35 -0500559
560 reg_write(ohci, OHCI1394_PhyControl, OHCI1394_PhyControl_Read(addr));
Clemens Ladisch153e3972010-06-10 08:22:07 +0200561 for (i = 0; i < 3 + 100; i++) {
Stefan Richter35d999b2010-04-10 16:04:56 +0200562 val = reg_read(ohci, OHCI1394_PhyControl);
Stefan Richter215fa442011-06-22 21:05:08 +0200563 if (!~val)
564 return -ENODEV; /* Card was ejected. */
565
Stefan Richter35d999b2010-04-10 16:04:56 +0200566 if (val & OHCI1394_PhyControl_ReadDone)
567 return OHCI1394_PhyControl_ReadData(val);
568
Clemens Ladisch153e3972010-06-10 08:22:07 +0200569 /*
570 * Try a few times without waiting. Sleeping is necessary
571 * only when the link/PHY interface is busy.
572 */
573 if (i >= 3)
574 msleep(1);
Kristian Høgsberged568912006-12-19 19:58:35 -0500575 }
Peter Hurley6fe9efb2013-03-27 06:57:40 -0400576 ohci_err(ohci, "failed to read phy reg %d\n", addr);
577 dump_stack();
Kristian Høgsberged568912006-12-19 19:58:35 -0500578
Stefan Richter35d999b2010-04-10 16:04:56 +0200579 return -EBUSY;
580}
Clemens Ladisch4a96b4f2010-04-04 15:19:52 +0200581
Stefan Richter35d999b2010-04-10 16:04:56 +0200582static int write_phy_reg(const struct fw_ohci *ohci, int addr, u32 val)
583{
584 int i;
585
586 reg_write(ohci, OHCI1394_PhyControl,
587 OHCI1394_PhyControl_Write(addr, val));
Clemens Ladisch153e3972010-06-10 08:22:07 +0200588 for (i = 0; i < 3 + 100; i++) {
Stefan Richter35d999b2010-04-10 16:04:56 +0200589 val = reg_read(ohci, OHCI1394_PhyControl);
Stefan Richter215fa442011-06-22 21:05:08 +0200590 if (!~val)
591 return -ENODEV; /* Card was ejected. */
592
Stefan Richter35d999b2010-04-10 16:04:56 +0200593 if (!(val & OHCI1394_PhyControl_WritePending))
594 return 0;
595
Clemens Ladisch153e3972010-06-10 08:22:07 +0200596 if (i >= 3)
597 msleep(1);
Stefan Richter35d999b2010-04-10 16:04:56 +0200598 }
Peter Hurley6fe9efb2013-03-27 06:57:40 -0400599 ohci_err(ohci, "failed to write phy reg %d, val %u\n", addr, val);
600 dump_stack();
Stefan Richter35d999b2010-04-10 16:04:56 +0200601
602 return -EBUSY;
Clemens Ladisch4a96b4f2010-04-04 15:19:52 +0200603}
604
Stefan Richter02d37be2010-07-08 16:09:06 +0200605static int update_phy_reg(struct fw_ohci *ohci, int addr,
606 int clear_bits, int set_bits)
Kristian Høgsberged568912006-12-19 19:58:35 -0500607{
Stefan Richter02d37be2010-07-08 16:09:06 +0200608 int ret = read_phy_reg(ohci, addr);
Stefan Richter35d999b2010-04-10 16:04:56 +0200609 if (ret < 0)
610 return ret;
Kristian Høgsberged568912006-12-19 19:58:35 -0500611
Clemens Ladische7014da2010-04-01 16:40:18 +0200612 /*
613 * The interrupt status bits are cleared by writing a one bit.
614 * Avoid clearing them unless explicitly requested in set_bits.
615 */
616 if (addr == 5)
617 clear_bits |= PHY_INT_STATUS_BITS;
Kristian Høgsberged568912006-12-19 19:58:35 -0500618
Stefan Richter35d999b2010-04-10 16:04:56 +0200619 return write_phy_reg(ohci, addr, (ret & ~clear_bits) | set_bits);
Kristian Høgsberged568912006-12-19 19:58:35 -0500620}
621
Stefan Richter35d999b2010-04-10 16:04:56 +0200622static int read_paged_phy_reg(struct fw_ohci *ohci, int page, int addr)
Clemens Ladisch925e7a62010-04-04 15:19:54 +0200623{
Stefan Richter35d999b2010-04-10 16:04:56 +0200624 int ret;
Clemens Ladisch925e7a62010-04-04 15:19:54 +0200625
Stefan Richter02d37be2010-07-08 16:09:06 +0200626 ret = update_phy_reg(ohci, 7, PHY_PAGE_SELECT, page << 5);
Stefan Richter35d999b2010-04-10 16:04:56 +0200627 if (ret < 0)
628 return ret;
Clemens Ladisch925e7a62010-04-04 15:19:54 +0200629
Stefan Richter35d999b2010-04-10 16:04:56 +0200630 return read_phy_reg(ohci, addr);
Kristian Høgsberged568912006-12-19 19:58:35 -0500631}
632
Stefan Richter02d37be2010-07-08 16:09:06 +0200633static int ohci_read_phy_reg(struct fw_card *card, int addr)
634{
635 struct fw_ohci *ohci = fw_ohci(card);
636 int ret;
637
638 mutex_lock(&ohci->phy_reg_mutex);
639 ret = read_phy_reg(ohci, addr);
640 mutex_unlock(&ohci->phy_reg_mutex);
641
642 return ret;
643}
644
Kristian Høgsberged568912006-12-19 19:58:35 -0500645static int ohci_update_phy_reg(struct fw_card *card, int addr,
646 int clear_bits, int set_bits)
647{
648 struct fw_ohci *ohci = fw_ohci(card);
Stefan Richter02d37be2010-07-08 16:09:06 +0200649 int ret;
Kristian Høgsberged568912006-12-19 19:58:35 -0500650
Stefan Richter02d37be2010-07-08 16:09:06 +0200651 mutex_lock(&ohci->phy_reg_mutex);
652 ret = update_phy_reg(ohci, addr, clear_bits, set_bits);
653 mutex_unlock(&ohci->phy_reg_mutex);
Kristian Høgsberged568912006-12-19 19:58:35 -0500654
Stefan Richter02d37be2010-07-08 16:09:06 +0200655 return ret;
Kristian Høgsberged568912006-12-19 19:58:35 -0500656}
657
Clemens Ladisch7a39d8b2010-11-26 08:57:31 +0100658static inline dma_addr_t ar_buffer_bus(struct ar_context *ctx, unsigned int i)
Kristian Høgsberged568912006-12-19 19:58:35 -0500659{
Clemens Ladisch7a39d8b2010-11-26 08:57:31 +0100660 return page_private(ctx->pages[i]);
661}
Kristian Høgsberg32b46092007-02-06 14:49:30 -0500662
Clemens Ladisch7a39d8b2010-11-26 08:57:31 +0100663static void ar_context_link_page(struct ar_context *ctx, unsigned int index)
664{
665 struct descriptor *d;
666
667 d = &ctx->descriptors[index];
668 d->branch_address &= cpu_to_le32(~0xf);
669 d->res_count = cpu_to_le16(PAGE_SIZE);
670 d->transfer_status = 0;
Kristian Høgsberg32b46092007-02-06 14:49:30 -0500671
Stefan Richter071595e2010-07-27 13:20:33 +0200672 wmb(); /* finish init of new descriptors before branch_address update */
Clemens Ladisch7a39d8b2010-11-26 08:57:31 +0100673 d = &ctx->descriptors[ctx->last_buffer_index];
674 d->branch_address |= cpu_to_le32(1);
675
676 ctx->last_buffer_index = index;
Kristian Høgsberg32b46092007-02-06 14:49:30 -0500677
Kristian Høgsberga77754a2007-05-07 20:33:35 -0400678 reg_write(ctx->ohci, CONTROL_SET(ctx->regs), CONTEXT_WAKE);
Clemens Ladisch837596a2010-10-25 11:42:42 +0200679}
680
Jay Fenlasona55709b2008-10-22 15:59:42 -0400681static void ar_context_release(struct ar_context *ctx)
682{
Clemens Ladisch7a39d8b2010-11-26 08:57:31 +0100683 unsigned int i;
Jay Fenlasona55709b2008-10-22 15:59:42 -0400684
Clemens Ladisch7a39d8b2010-11-26 08:57:31 +0100685 if (ctx->buffer)
686 vm_unmap_ram(ctx->buffer, AR_BUFFERS + AR_WRAPAROUND_PAGES);
687
688 for (i = 0; i < AR_BUFFERS; i++)
689 if (ctx->pages[i]) {
690 dma_unmap_page(ctx->ohci->card.device,
691 ar_buffer_bus(ctx, i),
692 PAGE_SIZE, DMA_FROM_DEVICE);
693 __free_page(ctx->pages[i]);
694 }
695}
696
697static void ar_context_abort(struct ar_context *ctx, const char *error_msg)
698{
Stefan Richter64d21722011-12-20 21:32:46 +0100699 struct fw_ohci *ohci = ctx->ohci;
Clemens Ladisch7a39d8b2010-11-26 08:57:31 +0100700
Stefan Richter64d21722011-12-20 21:32:46 +0100701 if (reg_read(ohci, CONTROL_CLEAR(ctx->regs)) & CONTEXT_RUN) {
702 reg_write(ohci, CONTROL_CLEAR(ctx->regs), CONTEXT_RUN);
703 flush_writes(ohci);
704
Peter Hurleyde97cb62013-03-26 11:54:06 -0400705 ohci_err(ohci, "AR error: %s; DMA stopped\n", error_msg);
Jay Fenlasona55709b2008-10-22 15:59:42 -0400706 }
Clemens Ladisch7a39d8b2010-11-26 08:57:31 +0100707 /* FIXME: restart? */
708}
709
710static inline unsigned int ar_next_buffer_index(unsigned int index)
711{
712 return (index + 1) % AR_BUFFERS;
713}
714
715static inline unsigned int ar_prev_buffer_index(unsigned int index)
716{
717 return (index - 1 + AR_BUFFERS) % AR_BUFFERS;
718}
719
720static inline unsigned int ar_first_buffer_index(struct ar_context *ctx)
721{
722 return ar_next_buffer_index(ctx->last_buffer_index);
723}
724
725/*
726 * We search for the buffer that contains the last AR packet DMA data written
727 * by the controller.
728 */
729static unsigned int ar_search_last_active_buffer(struct ar_context *ctx,
730 unsigned int *buffer_offset)
731{
732 unsigned int i, next_i, last = ctx->last_buffer_index;
733 __le16 res_count, next_res_count;
734
735 i = ar_first_buffer_index(ctx);
736 res_count = ACCESS_ONCE(ctx->descriptors[i].res_count);
737
738 /* A buffer that is not yet completely filled must be the last one. */
739 while (i != last && res_count == 0) {
740
741 /* Peek at the next descriptor. */
742 next_i = ar_next_buffer_index(i);
743 rmb(); /* read descriptors in order */
744 next_res_count = ACCESS_ONCE(
745 ctx->descriptors[next_i].res_count);
746 /*
747 * If the next descriptor is still empty, we must stop at this
748 * descriptor.
749 */
750 if (next_res_count == cpu_to_le16(PAGE_SIZE)) {
751 /*
752 * The exception is when the DMA data for one packet is
753 * split over three buffers; in this case, the middle
754 * buffer's descriptor might be never updated by the
755 * controller and look still empty, and we have to peek
756 * at the third one.
757 */
758 if (MAX_AR_PACKET_SIZE > PAGE_SIZE && i != last) {
759 next_i = ar_next_buffer_index(next_i);
760 rmb();
761 next_res_count = ACCESS_ONCE(
762 ctx->descriptors[next_i].res_count);
763 if (next_res_count != cpu_to_le16(PAGE_SIZE))
764 goto next_buffer_is_active;
765 }
766
767 break;
768 }
769
770next_buffer_is_active:
771 i = next_i;
772 res_count = next_res_count;
773 }
774
775 rmb(); /* read res_count before the DMA data */
776
777 *buffer_offset = PAGE_SIZE - le16_to_cpu(res_count);
778 if (*buffer_offset > PAGE_SIZE) {
779 *buffer_offset = 0;
780 ar_context_abort(ctx, "corrupted descriptor");
781 }
782
783 return i;
784}
785
786static void ar_sync_buffers_for_cpu(struct ar_context *ctx,
787 unsigned int end_buffer_index,
788 unsigned int end_buffer_offset)
789{
790 unsigned int i;
791
792 i = ar_first_buffer_index(ctx);
793 while (i != end_buffer_index) {
794 dma_sync_single_for_cpu(ctx->ohci->card.device,
795 ar_buffer_bus(ctx, i),
796 PAGE_SIZE, DMA_FROM_DEVICE);
797 i = ar_next_buffer_index(i);
798 }
799 if (end_buffer_offset > 0)
800 dma_sync_single_for_cpu(ctx->ohci->card.device,
801 ar_buffer_bus(ctx, i),
802 end_buffer_offset, DMA_FROM_DEVICE);
Jay Fenlasona55709b2008-10-22 15:59:42 -0400803}
804
Stefan Richter11bf20a2008-03-01 02:47:15 +0100805#if defined(CONFIG_PPC_PMAC) && defined(CONFIG_PPC32)
806#define cond_le32_to_cpu(v) \
Stefan Richter4a635592010-02-21 17:58:01 +0100807 (ohci->quirks & QUIRK_BE_HEADERS ? (__force __u32)(v) : le32_to_cpu(v))
Stefan Richter11bf20a2008-03-01 02:47:15 +0100808#else
809#define cond_le32_to_cpu(v) le32_to_cpu(v)
810#endif
811
Kristian Høgsberg32b46092007-02-06 14:49:30 -0500812static __le32 *handle_ar_packet(struct ar_context *ctx, __le32 *buffer)
Kristian Høgsberged568912006-12-19 19:58:35 -0500813{
Kristian Høgsberged568912006-12-19 19:58:35 -0500814 struct fw_ohci *ohci = ctx->ohci;
Kristian Høgsberg2639a6f2007-01-26 00:37:57 -0500815 struct fw_packet p;
816 u32 status, length, tcode;
Stefan Richter43286562008-03-11 21:22:26 +0100817 int evt;
Kristian Høgsberg0edeefd2007-01-26 00:38:49 -0500818
Stefan Richter11bf20a2008-03-01 02:47:15 +0100819 p.header[0] = cond_le32_to_cpu(buffer[0]);
820 p.header[1] = cond_le32_to_cpu(buffer[1]);
821 p.header[2] = cond_le32_to_cpu(buffer[2]);
Kristian Høgsberg2639a6f2007-01-26 00:37:57 -0500822
823 tcode = (p.header[0] >> 4) & 0x0f;
824 switch (tcode) {
825 case TCODE_WRITE_QUADLET_REQUEST:
826 case TCODE_READ_QUADLET_RESPONSE:
Kristian Høgsberg32b46092007-02-06 14:49:30 -0500827 p.header[3] = (__force __u32) buffer[3];
Kristian Høgsberg2639a6f2007-01-26 00:37:57 -0500828 p.header_length = 16;
Kristian Høgsberg32b46092007-02-06 14:49:30 -0500829 p.payload_length = 0;
830 break;
831
832 case TCODE_READ_BLOCK_REQUEST :
Stefan Richter11bf20a2008-03-01 02:47:15 +0100833 p.header[3] = cond_le32_to_cpu(buffer[3]);
Kristian Høgsberg32b46092007-02-06 14:49:30 -0500834 p.header_length = 16;
835 p.payload_length = 0;
Kristian Høgsberg2639a6f2007-01-26 00:37:57 -0500836 break;
837
838 case TCODE_WRITE_BLOCK_REQUEST:
Kristian Høgsberg2639a6f2007-01-26 00:37:57 -0500839 case TCODE_READ_BLOCK_RESPONSE:
840 case TCODE_LOCK_REQUEST:
841 case TCODE_LOCK_RESPONSE:
Stefan Richter11bf20a2008-03-01 02:47:15 +0100842 p.header[3] = cond_le32_to_cpu(buffer[3]);
Kristian Høgsberg2639a6f2007-01-26 00:37:57 -0500843 p.header_length = 16;
Kristian Høgsberg32b46092007-02-06 14:49:30 -0500844 p.payload_length = p.header[3] >> 16;
Clemens Ladisch7a39d8b2010-11-26 08:57:31 +0100845 if (p.payload_length > MAX_ASYNC_PAYLOAD) {
846 ar_context_abort(ctx, "invalid packet length");
847 return NULL;
848 }
Kristian Høgsberg2639a6f2007-01-26 00:37:57 -0500849 break;
850
851 case TCODE_WRITE_RESPONSE:
852 case TCODE_READ_QUADLET_REQUEST:
Kristian Høgsberg32b46092007-02-06 14:49:30 -0500853 case OHCI_TCODE_PHY_PACKET:
Kristian Høgsberg2639a6f2007-01-26 00:37:57 -0500854 p.header_length = 12;
Kristian Høgsberg32b46092007-02-06 14:49:30 -0500855 p.payload_length = 0;
Kristian Høgsberg2639a6f2007-01-26 00:37:57 -0500856 break;
Stefan Richterccff9622008-05-31 19:36:06 +0200857
858 default:
Clemens Ladisch7a39d8b2010-11-26 08:57:31 +0100859 ar_context_abort(ctx, "invalid tcode");
860 return NULL;
Kristian Høgsberg2639a6f2007-01-26 00:37:57 -0500861 }
862
Kristian Høgsberg32b46092007-02-06 14:49:30 -0500863 p.payload = (void *) buffer + p.header_length;
864
865 /* FIXME: What to do about evt_* errors? */
866 length = (p.header_length + p.payload_length + 3) / 4;
Stefan Richter11bf20a2008-03-01 02:47:15 +0100867 status = cond_le32_to_cpu(buffer[length]);
Stefan Richter43286562008-03-11 21:22:26 +0100868 evt = (status >> 16) & 0x1f;
Kristian Høgsberg32b46092007-02-06 14:49:30 -0500869
Stefan Richter43286562008-03-11 21:22:26 +0100870 p.ack = evt - 16;
Kristian Høgsberg32b46092007-02-06 14:49:30 -0500871 p.speed = (status >> 21) & 0x7;
872 p.timestamp = status & 0xffff;
873 p.generation = ohci->request_generation;
Kristian Høgsberged568912006-12-19 19:58:35 -0500874
Stefan Richter64d21722011-12-20 21:32:46 +0100875 log_ar_at_event(ohci, 'R', p.speed, p.header, evt);
Stefan Richterad3c0fe2008-03-20 22:04:36 +0100876
Kristian Høgsbergc781c062007-05-07 20:33:32 -0400877 /*
Stefan Richtera4dc0902010-08-28 14:21:26 +0200878 * Several controllers, notably from NEC and VIA, forget to
879 * write ack_complete status at PHY packet reception.
880 */
881 if (evt == OHCI1394_evt_no_status &&
882 (p.header[0] & 0xff) == (OHCI1394_phy_tcode << 4))
883 p.ack = ACK_COMPLETE;
884
885 /*
886 * The OHCI bus reset handler synthesizes a PHY packet with
Kristian Høgsberged568912006-12-19 19:58:35 -0500887 * the new generation number when a bus reset happens (see
888 * section 8.4.2.3). This helps us determine when a request
889 * was received and make sure we send the response in the same
890 * generation. We only need this for requests; for responses
891 * we use the unique tlabel for finding the matching
Kristian Høgsbergc781c062007-05-07 20:33:32 -0400892 * request.
Stefan Richterd34316a2008-04-12 22:31:25 +0200893 *
894 * Alas some chips sometimes emit bus reset packets with a
895 * wrong generation. We set the correct generation for these
Stephan Gatzka2d7a36e2011-07-25 22:16:24 +0200896 * at a slightly incorrect time (in bus_reset_work).
Kristian Høgsbergc781c062007-05-07 20:33:32 -0400897 */
Stefan Richterd34316a2008-04-12 22:31:25 +0200898 if (evt == OHCI1394_evt_bus_reset) {
Stefan Richter4a635592010-02-21 17:58:01 +0100899 if (!(ohci->quirks & QUIRK_RESET_PACKET))
Stefan Richterd34316a2008-04-12 22:31:25 +0200900 ohci->request_generation = (p.header[2] >> 16) & 0xff;
901 } else if (ctx == &ohci->ar_request_ctx) {
Kristian Høgsberg2639a6f2007-01-26 00:37:57 -0500902 fw_core_handle_request(&ohci->card, &p);
Stefan Richterd34316a2008-04-12 22:31:25 +0200903 } else {
Kristian Høgsberg2639a6f2007-01-26 00:37:57 -0500904 fw_core_handle_response(&ohci->card, &p);
Stefan Richterd34316a2008-04-12 22:31:25 +0200905 }
Kristian Høgsberged568912006-12-19 19:58:35 -0500906
Kristian Høgsberg32b46092007-02-06 14:49:30 -0500907 return buffer + length + 1;
908}
Kristian Høgsberged568912006-12-19 19:58:35 -0500909
Clemens Ladisch7a39d8b2010-11-26 08:57:31 +0100910static void *handle_ar_packets(struct ar_context *ctx, void *p, void *end)
911{
912 void *next;
913
914 while (p < end) {
915 next = handle_ar_packet(ctx, p);
916 if (!next)
917 return p;
918 p = next;
919 }
920
921 return p;
922}
923
924static void ar_recycle_buffers(struct ar_context *ctx, unsigned int end_buffer)
925{
926 unsigned int i;
927
928 i = ar_first_buffer_index(ctx);
929 while (i != end_buffer) {
930 dma_sync_single_for_device(ctx->ohci->card.device,
931 ar_buffer_bus(ctx, i),
932 PAGE_SIZE, DMA_FROM_DEVICE);
933 ar_context_link_page(ctx, i);
934 i = ar_next_buffer_index(i);
935 }
936}
937
Kristian Høgsberg32b46092007-02-06 14:49:30 -0500938static void ar_context_tasklet(unsigned long data)
939{
940 struct ar_context *ctx = (struct ar_context *)data;
Clemens Ladisch7a39d8b2010-11-26 08:57:31 +0100941 unsigned int end_buffer_index, end_buffer_offset;
942 void *p, *end;
Kristian Høgsberged568912006-12-19 19:58:35 -0500943
Clemens Ladisch7a39d8b2010-11-26 08:57:31 +0100944 p = ctx->pointer;
945 if (!p)
946 return;
Kristian Høgsberged568912006-12-19 19:58:35 -0500947
Clemens Ladisch7a39d8b2010-11-26 08:57:31 +0100948 end_buffer_index = ar_search_last_active_buffer(ctx,
949 &end_buffer_offset);
950 ar_sync_buffers_for_cpu(ctx, end_buffer_index, end_buffer_offset);
951 end = ctx->buffer + end_buffer_index * PAGE_SIZE + end_buffer_offset;
Kristian Høgsberg32b46092007-02-06 14:49:30 -0500952
Clemens Ladisch7a39d8b2010-11-26 08:57:31 +0100953 if (end_buffer_index < ar_first_buffer_index(ctx)) {
Kristian Høgsbergc781c062007-05-07 20:33:32 -0400954 /*
Clemens Ladisch7a39d8b2010-11-26 08:57:31 +0100955 * The filled part of the overall buffer wraps around; handle
956 * all packets up to the buffer end here. If the last packet
957 * wraps around, its tail will be visible after the buffer end
958 * because the buffer start pages are mapped there again.
Kristian Høgsbergc781c062007-05-07 20:33:32 -0400959 */
Clemens Ladisch7a39d8b2010-11-26 08:57:31 +0100960 void *buffer_end = ctx->buffer + AR_BUFFERS * PAGE_SIZE;
961 p = handle_ar_packets(ctx, p, buffer_end);
962 if (p < buffer_end)
963 goto error;
964 /* adjust p to point back into the actual buffer */
965 p -= AR_BUFFERS * PAGE_SIZE;
Kristian Høgsberg32b46092007-02-06 14:49:30 -0500966 }
Clemens Ladisch7a39d8b2010-11-26 08:57:31 +0100967
968 p = handle_ar_packets(ctx, p, end);
969 if (p != end) {
970 if (p > end)
971 ar_context_abort(ctx, "inconsistent descriptor");
972 goto error;
973 }
974
975 ctx->pointer = p;
976 ar_recycle_buffers(ctx, end_buffer_index);
977
978 return;
979
980error:
981 ctx->pointer = NULL;
Kristian Høgsberged568912006-12-19 19:58:35 -0500982}
983
Clemens Ladischec766a72010-11-30 08:25:17 +0100984static int ar_context_init(struct ar_context *ctx, struct fw_ohci *ohci,
985 unsigned int descriptors_offset, u32 regs)
Kristian Høgsberged568912006-12-19 19:58:35 -0500986{
Clemens Ladisch7a39d8b2010-11-26 08:57:31 +0100987 unsigned int i;
988 dma_addr_t dma_addr;
989 struct page *pages[AR_BUFFERS + AR_WRAPAROUND_PAGES];
990 struct descriptor *d;
Kristian Høgsberged568912006-12-19 19:58:35 -0500991
Kristian Høgsberg72e318e2007-02-06 14:49:31 -0500992 ctx->regs = regs;
993 ctx->ohci = ohci;
Kristian Høgsberged568912006-12-19 19:58:35 -0500994 tasklet_init(&ctx->tasklet, ar_context_tasklet, (unsigned long)ctx);
995
Clemens Ladisch7a39d8b2010-11-26 08:57:31 +0100996 for (i = 0; i < AR_BUFFERS; i++) {
997 ctx->pages[i] = alloc_page(GFP_KERNEL | GFP_DMA32);
998 if (!ctx->pages[i])
999 goto out_of_memory;
1000 dma_addr = dma_map_page(ohci->card.device, ctx->pages[i],
1001 0, PAGE_SIZE, DMA_FROM_DEVICE);
1002 if (dma_mapping_error(ohci->card.device, dma_addr)) {
1003 __free_page(ctx->pages[i]);
1004 ctx->pages[i] = NULL;
1005 goto out_of_memory;
1006 }
1007 set_page_private(ctx->pages[i], dma_addr);
1008 }
1009
1010 for (i = 0; i < AR_BUFFERS; i++)
1011 pages[i] = ctx->pages[i];
1012 for (i = 0; i < AR_WRAPAROUND_PAGES; i++)
1013 pages[AR_BUFFERS + i] = ctx->pages[i];
1014 ctx->buffer = vm_map_ram(pages, AR_BUFFERS + AR_WRAPAROUND_PAGES,
Clemens Ladisch14271302011-01-13 10:12:17 +01001015 -1, PAGE_KERNEL);
Clemens Ladisch7a39d8b2010-11-26 08:57:31 +01001016 if (!ctx->buffer)
1017 goto out_of_memory;
1018
Clemens Ladischec766a72010-11-30 08:25:17 +01001019 ctx->descriptors = ohci->misc_buffer + descriptors_offset;
1020 ctx->descriptors_bus = ohci->misc_buffer_bus + descriptors_offset;
Clemens Ladisch7a39d8b2010-11-26 08:57:31 +01001021
1022 for (i = 0; i < AR_BUFFERS; i++) {
1023 d = &ctx->descriptors[i];
1024 d->req_count = cpu_to_le16(PAGE_SIZE);
1025 d->control = cpu_to_le16(DESCRIPTOR_INPUT_MORE |
1026 DESCRIPTOR_STATUS |
1027 DESCRIPTOR_BRANCH_ALWAYS);
1028 d->data_address = cpu_to_le32(ar_buffer_bus(ctx, i));
1029 d->branch_address = cpu_to_le32(ctx->descriptors_bus +
1030 ar_next_buffer_index(i) * sizeof(struct descriptor));
1031 }
Kristian Høgsberg32b46092007-02-06 14:49:30 -05001032
Kristian Høgsberg2aef4692007-05-30 19:06:35 -04001033 return 0;
Clemens Ladisch7a39d8b2010-11-26 08:57:31 +01001034
1035out_of_memory:
1036 ar_context_release(ctx);
1037
1038 return -ENOMEM;
Kristian Høgsberg2aef4692007-05-30 19:06:35 -04001039}
1040
1041static void ar_context_run(struct ar_context *ctx)
1042{
Clemens Ladisch7a39d8b2010-11-26 08:57:31 +01001043 unsigned int i;
Kristian Høgsberg2aef4692007-05-30 19:06:35 -04001044
Clemens Ladisch7a39d8b2010-11-26 08:57:31 +01001045 for (i = 0; i < AR_BUFFERS; i++)
1046 ar_context_link_page(ctx, i);
Kristian Høgsberg2aef4692007-05-30 19:06:35 -04001047
Clemens Ladisch7a39d8b2010-11-26 08:57:31 +01001048 ctx->pointer = ctx->buffer;
1049
1050 reg_write(ctx->ohci, COMMAND_PTR(ctx->regs), ctx->descriptors_bus | 1);
Kristian Høgsberga77754a2007-05-07 20:33:35 -04001051 reg_write(ctx->ohci, CONTROL_SET(ctx->regs), CONTEXT_RUN);
Kristian Høgsberged568912006-12-19 19:58:35 -05001052}
Stefan Richter373b2ed2007-03-04 14:45:18 +01001053
Stefan Richter53dca512008-12-14 21:47:04 +01001054static struct descriptor *find_branch_descriptor(struct descriptor *d, int z)
Jarod Wilsona186b4a2007-12-03 13:43:12 -05001055{
Clemens Ladisch0ff8fbc2011-04-12 07:54:59 +02001056 __le16 branch;
Jarod Wilsona186b4a2007-12-03 13:43:12 -05001057
Clemens Ladisch0ff8fbc2011-04-12 07:54:59 +02001058 branch = d->control & cpu_to_le16(DESCRIPTOR_BRANCH_ALWAYS);
Jarod Wilsona186b4a2007-12-03 13:43:12 -05001059
1060 /* figure out which descriptor the branch address goes in */
Clemens Ladisch0ff8fbc2011-04-12 07:54:59 +02001061 if (z == 2 && branch == cpu_to_le16(DESCRIPTOR_BRANCH_ALWAYS))
Jarod Wilsona186b4a2007-12-03 13:43:12 -05001062 return d;
1063 else
1064 return d + z - 1;
1065}
1066
Kristian Høgsberg30200732007-02-16 17:34:39 -05001067static void context_tasklet(unsigned long data)
1068{
1069 struct context *ctx = (struct context *) data;
Kristian Høgsberg30200732007-02-16 17:34:39 -05001070 struct descriptor *d, *last;
1071 u32 address;
1072 int z;
David Moorefe5ca632008-01-06 17:21:41 -05001073 struct descriptor_buffer *desc;
Kristian Høgsberg30200732007-02-16 17:34:39 -05001074
David Moorefe5ca632008-01-06 17:21:41 -05001075 desc = list_entry(ctx->buffer_list.next,
1076 struct descriptor_buffer, list);
1077 last = ctx->last;
Kristian Høgsberg30200732007-02-16 17:34:39 -05001078 while (last->branch_address != 0) {
David Moorefe5ca632008-01-06 17:21:41 -05001079 struct descriptor_buffer *old_desc = desc;
Kristian Høgsberg30200732007-02-16 17:34:39 -05001080 address = le32_to_cpu(last->branch_address);
1081 z = address & 0xf;
David Moorefe5ca632008-01-06 17:21:41 -05001082 address &= ~0xf;
Clemens Ladischa572e682011-10-15 23:12:23 +02001083 ctx->current_bus = address;
David Moorefe5ca632008-01-06 17:21:41 -05001084
1085 /* If the branch address points to a buffer outside of the
1086 * current buffer, advance to the next buffer. */
1087 if (address < desc->buffer_bus ||
1088 address >= desc->buffer_bus + desc->used)
1089 desc = list_entry(desc->list.next,
1090 struct descriptor_buffer, list);
1091 d = desc->buffer + (address - desc->buffer_bus) / sizeof(*d);
Jarod Wilsona186b4a2007-12-03 13:43:12 -05001092 last = find_branch_descriptor(d, z);
Kristian Høgsberg30200732007-02-16 17:34:39 -05001093
1094 if (!ctx->callback(ctx, d, last))
1095 break;
1096
David Moorefe5ca632008-01-06 17:21:41 -05001097 if (old_desc != desc) {
1098 /* If we've advanced to the next buffer, move the
1099 * previous buffer to the free list. */
1100 unsigned long flags;
1101 old_desc->used = 0;
1102 spin_lock_irqsave(&ctx->ohci->lock, flags);
1103 list_move_tail(&old_desc->list, &ctx->buffer_list);
1104 spin_unlock_irqrestore(&ctx->ohci->lock, flags);
1105 }
1106 ctx->last = last;
Kristian Høgsberg30200732007-02-16 17:34:39 -05001107 }
1108}
1109
David Moorefe5ca632008-01-06 17:21:41 -05001110/*
1111 * Allocate a new buffer and add it to the list of free buffers for this
1112 * context. Must be called with ohci->lock held.
1113 */
Stefan Richter53dca512008-12-14 21:47:04 +01001114static int context_add_buffer(struct context *ctx)
David Moorefe5ca632008-01-06 17:21:41 -05001115{
1116 struct descriptor_buffer *desc;
Stefan Richterf5101d582008-03-14 00:27:49 +01001117 dma_addr_t uninitialized_var(bus_addr);
David Moorefe5ca632008-01-06 17:21:41 -05001118 int offset;
1119
1120 /*
1121 * 16MB of descriptors should be far more than enough for any DMA
1122 * program. This will catch run-away userspace or DoS attacks.
1123 */
1124 if (ctx->total_allocation >= 16*1024*1024)
1125 return -ENOMEM;
1126
1127 desc = dma_alloc_coherent(ctx->ohci->card.device, PAGE_SIZE,
1128 &bus_addr, GFP_ATOMIC);
1129 if (!desc)
1130 return -ENOMEM;
1131
1132 offset = (void *)&desc->buffer - (void *)desc;
1133 desc->buffer_size = PAGE_SIZE - offset;
1134 desc->buffer_bus = bus_addr + offset;
1135 desc->used = 0;
1136
1137 list_add_tail(&desc->list, &ctx->buffer_list);
1138 ctx->total_allocation += PAGE_SIZE;
1139
1140 return 0;
1141}
1142
Stefan Richter53dca512008-12-14 21:47:04 +01001143static int context_init(struct context *ctx, struct fw_ohci *ohci,
1144 u32 regs, descriptor_callback_t callback)
Kristian Høgsberg30200732007-02-16 17:34:39 -05001145{
1146 ctx->ohci = ohci;
1147 ctx->regs = regs;
David Moorefe5ca632008-01-06 17:21:41 -05001148 ctx->total_allocation = 0;
1149
1150 INIT_LIST_HEAD(&ctx->buffer_list);
1151 if (context_add_buffer(ctx) < 0)
Kristian Høgsberg30200732007-02-16 17:34:39 -05001152 return -ENOMEM;
1153
David Moorefe5ca632008-01-06 17:21:41 -05001154 ctx->buffer_tail = list_entry(ctx->buffer_list.next,
1155 struct descriptor_buffer, list);
1156
Kristian Høgsberg30200732007-02-16 17:34:39 -05001157 tasklet_init(&ctx->tasklet, context_tasklet, (unsigned long)ctx);
1158 ctx->callback = callback;
1159
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001160 /*
1161 * We put a dummy descriptor in the buffer that has a NULL
Kristian Høgsberg30200732007-02-16 17:34:39 -05001162 * branch address and looks like it's been sent. That way we
David Moorefe5ca632008-01-06 17:21:41 -05001163 * have a descriptor to append DMA programs to.
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001164 */
David Moorefe5ca632008-01-06 17:21:41 -05001165 memset(ctx->buffer_tail->buffer, 0, sizeof(*ctx->buffer_tail->buffer));
1166 ctx->buffer_tail->buffer->control = cpu_to_le16(DESCRIPTOR_OUTPUT_LAST);
1167 ctx->buffer_tail->buffer->transfer_status = cpu_to_le16(0x8011);
1168 ctx->buffer_tail->used += sizeof(*ctx->buffer_tail->buffer);
1169 ctx->last = ctx->buffer_tail->buffer;
1170 ctx->prev = ctx->buffer_tail->buffer;
Andy Leisersonbe8dcab2013-04-24 09:10:32 -07001171 ctx->prev_z = 1;
Kristian Høgsberg30200732007-02-16 17:34:39 -05001172
1173 return 0;
1174}
1175
Stefan Richter53dca512008-12-14 21:47:04 +01001176static void context_release(struct context *ctx)
Kristian Høgsberg30200732007-02-16 17:34:39 -05001177{
1178 struct fw_card *card = &ctx->ohci->card;
David Moorefe5ca632008-01-06 17:21:41 -05001179 struct descriptor_buffer *desc, *tmp;
Kristian Høgsberg30200732007-02-16 17:34:39 -05001180
David Moorefe5ca632008-01-06 17:21:41 -05001181 list_for_each_entry_safe(desc, tmp, &ctx->buffer_list, list)
1182 dma_free_coherent(card->device, PAGE_SIZE, desc,
1183 desc->buffer_bus -
1184 ((void *)&desc->buffer - (void *)desc));
Kristian Høgsberg30200732007-02-16 17:34:39 -05001185}
1186
David Moorefe5ca632008-01-06 17:21:41 -05001187/* Must be called with ohci->lock held */
Stefan Richter53dca512008-12-14 21:47:04 +01001188static struct descriptor *context_get_descriptors(struct context *ctx,
1189 int z, dma_addr_t *d_bus)
Kristian Høgsberg30200732007-02-16 17:34:39 -05001190{
David Moorefe5ca632008-01-06 17:21:41 -05001191 struct descriptor *d = NULL;
1192 struct descriptor_buffer *desc = ctx->buffer_tail;
Kristian Høgsberg30200732007-02-16 17:34:39 -05001193
David Moorefe5ca632008-01-06 17:21:41 -05001194 if (z * sizeof(*d) > desc->buffer_size)
1195 return NULL;
Kristian Høgsberg30200732007-02-16 17:34:39 -05001196
David Moorefe5ca632008-01-06 17:21:41 -05001197 if (z * sizeof(*d) > desc->buffer_size - desc->used) {
1198 /* No room for the descriptor in this buffer, so advance to the
1199 * next one. */
1200
1201 if (desc->list.next == &ctx->buffer_list) {
1202 /* If there is no free buffer next in the list,
1203 * allocate one. */
1204 if (context_add_buffer(ctx) < 0)
1205 return NULL;
1206 }
1207 desc = list_entry(desc->list.next,
1208 struct descriptor_buffer, list);
1209 ctx->buffer_tail = desc;
Kristian Høgsberg30200732007-02-16 17:34:39 -05001210 }
1211
David Moorefe5ca632008-01-06 17:21:41 -05001212 d = desc->buffer + desc->used / sizeof(*d);
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -04001213 memset(d, 0, z * sizeof(*d));
David Moorefe5ca632008-01-06 17:21:41 -05001214 *d_bus = desc->buffer_bus + desc->used;
Kristian Høgsberg30200732007-02-16 17:34:39 -05001215
1216 return d;
1217}
1218
Kristian Høgsberg295e3fe2007-02-16 17:34:40 -05001219static void context_run(struct context *ctx, u32 extra)
Kristian Høgsberg30200732007-02-16 17:34:39 -05001220{
1221 struct fw_ohci *ohci = ctx->ohci;
1222
Kristian Høgsberga77754a2007-05-07 20:33:35 -04001223 reg_write(ohci, COMMAND_PTR(ctx->regs),
David Moorefe5ca632008-01-06 17:21:41 -05001224 le32_to_cpu(ctx->last->branch_address));
Kristian Høgsberga77754a2007-05-07 20:33:35 -04001225 reg_write(ohci, CONTROL_CLEAR(ctx->regs), ~0);
1226 reg_write(ohci, CONTROL_SET(ctx->regs), CONTEXT_RUN | extra);
Clemens Ladisch386a4152010-12-24 14:42:46 +01001227 ctx->running = true;
Kristian Høgsberg30200732007-02-16 17:34:39 -05001228 flush_writes(ohci);
1229}
1230
1231static void context_append(struct context *ctx,
1232 struct descriptor *d, int z, int extra)
1233{
1234 dma_addr_t d_bus;
David Moorefe5ca632008-01-06 17:21:41 -05001235 struct descriptor_buffer *desc = ctx->buffer_tail;
Andy Leisersonbe8dcab2013-04-24 09:10:32 -07001236 struct descriptor *d_branch;
Kristian Høgsberg30200732007-02-16 17:34:39 -05001237
David Moorefe5ca632008-01-06 17:21:41 -05001238 d_bus = desc->buffer_bus + (d - desc->buffer) * sizeof(*d);
Kristian Høgsberg30200732007-02-16 17:34:39 -05001239
David Moorefe5ca632008-01-06 17:21:41 -05001240 desc->used += (z + extra) * sizeof(*d);
Stefan Richter071595e2010-07-27 13:20:33 +02001241
1242 wmb(); /* finish init of new descriptors before branch_address update */
Andy Leisersonbe8dcab2013-04-24 09:10:32 -07001243
1244 d_branch = find_branch_descriptor(ctx->prev, ctx->prev_z);
1245 d_branch->branch_address = cpu_to_le32(d_bus | z);
1246
1247 /*
1248 * VT6306 incorrectly checks only the single descriptor at the
1249 * CommandPtr when the wake bit is written, so if it's a
1250 * multi-descriptor block starting with an INPUT_MORE, put a copy of
1251 * the branch address in the first descriptor.
1252 *
1253 * Not doing this for transmit contexts since not sure how it interacts
1254 * with skip addresses.
1255 */
1256 if (unlikely(ctx->ohci->quirks & QUIRK_IR_WAKE) &&
1257 d_branch != ctx->prev &&
1258 (ctx->prev->control & cpu_to_le16(DESCRIPTOR_CMD)) ==
1259 cpu_to_le16(DESCRIPTOR_INPUT_MORE)) {
1260 ctx->prev->branch_address = cpu_to_le32(d_bus | z);
1261 }
1262
1263 ctx->prev = d;
1264 ctx->prev_z = z;
Kristian Høgsberg30200732007-02-16 17:34:39 -05001265}
1266
1267static void context_stop(struct context *ctx)
1268{
Stefan Richter64d21722011-12-20 21:32:46 +01001269 struct fw_ohci *ohci = ctx->ohci;
Kristian Høgsberg30200732007-02-16 17:34:39 -05001270 u32 reg;
Kristian Høgsbergb8295662007-02-16 17:34:42 -05001271 int i;
Kristian Høgsberg30200732007-02-16 17:34:39 -05001272
Stefan Richter64d21722011-12-20 21:32:46 +01001273 reg_write(ohci, CONTROL_CLEAR(ctx->regs), CONTEXT_RUN);
Clemens Ladisch386a4152010-12-24 14:42:46 +01001274 ctx->running = false;
Kristian Høgsberg30200732007-02-16 17:34:39 -05001275
Stefan Richter9ef28cc2011-06-12 14:30:57 +02001276 for (i = 0; i < 1000; i++) {
Stefan Richter64d21722011-12-20 21:32:46 +01001277 reg = reg_read(ohci, CONTROL_SET(ctx->regs));
Kristian Høgsbergb8295662007-02-16 17:34:42 -05001278 if ((reg & CONTEXT_ACTIVE) == 0)
Stefan Richterb0068542009-01-05 20:43:23 +01001279 return;
Kristian Høgsbergb8295662007-02-16 17:34:42 -05001280
Stefan Richter9ef28cc2011-06-12 14:30:57 +02001281 if (i)
1282 udelay(10);
Kristian Høgsbergb8295662007-02-16 17:34:42 -05001283 }
Peter Hurleyde97cb62013-03-26 11:54:06 -04001284 ohci_err(ohci, "DMA context still active (0x%08x)\n", reg);
Kristian Høgsberg30200732007-02-16 17:34:39 -05001285}
Kristian Høgsberged568912006-12-19 19:58:35 -05001286
Kristian Høgsbergf319b6a2007-03-07 12:12:49 -05001287struct driver_data {
Clemens Ladischda289472011-04-11 09:57:54 +02001288 u8 inline_data[8];
Kristian Høgsberged568912006-12-19 19:58:35 -05001289 struct fw_packet *packet;
Kristian Høgsbergf319b6a2007-03-07 12:12:49 -05001290};
1291
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001292/*
1293 * This function apppends a packet to the DMA queue for transmission.
Kristian Høgsbergf319b6a2007-03-07 12:12:49 -05001294 * Must always be called with the ochi->lock held to ensure proper
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001295 * generation handling and locking around packet queue manipulation.
1296 */
Stefan Richter53dca512008-12-14 21:47:04 +01001297static int at_context_queue_packet(struct context *ctx,
1298 struct fw_packet *packet)
Kristian Høgsbergf319b6a2007-03-07 12:12:49 -05001299{
Kristian Høgsberged568912006-12-19 19:58:35 -05001300 struct fw_ohci *ohci = ctx->ohci;
Stefan Richter4b6d51e2007-10-21 11:20:07 +02001301 dma_addr_t d_bus, uninitialized_var(payload_bus);
Kristian Høgsbergf319b6a2007-03-07 12:12:49 -05001302 struct driver_data *driver_data;
1303 struct descriptor *d, *last;
1304 __le32 *header;
Kristian Høgsberged568912006-12-19 19:58:35 -05001305 int z, tcode;
1306
Kristian Høgsbergf319b6a2007-03-07 12:12:49 -05001307 d = context_get_descriptors(ctx, 4, &d_bus);
1308 if (d == NULL) {
1309 packet->ack = RCODE_SEND_ERROR;
1310 return -1;
Kristian Høgsberged568912006-12-19 19:58:35 -05001311 }
1312
Kristian Høgsberga77754a2007-05-07 20:33:35 -04001313 d[0].control = cpu_to_le16(DESCRIPTOR_KEY_IMMEDIATE);
Kristian Høgsbergf319b6a2007-03-07 12:12:49 -05001314 d[0].res_count = cpu_to_le16(packet->timestamp);
1315
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001316 /*
Adam Buchbinderb3834be2012-09-19 21:48:02 -04001317 * The DMA format for asynchronous link packets is different
Kristian Høgsberged568912006-12-19 19:58:35 -05001318 * from the IEEE1394 layout, so shift the fields around
Clemens Ladisch5b06db12010-11-30 08:24:47 +01001319 * accordingly.
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001320 */
Kristian Høgsbergf319b6a2007-03-07 12:12:49 -05001321
Clemens Ladisch5b06db12010-11-30 08:24:47 +01001322 tcode = (packet->header[0] >> 4) & 0x0f;
Kristian Høgsbergf319b6a2007-03-07 12:12:49 -05001323 header = (__le32 *) &d[1];
Clemens Ladisch5b06db12010-11-30 08:24:47 +01001324 switch (tcode) {
1325 case TCODE_WRITE_QUADLET_REQUEST:
1326 case TCODE_WRITE_BLOCK_REQUEST:
1327 case TCODE_WRITE_RESPONSE:
1328 case TCODE_READ_QUADLET_REQUEST:
1329 case TCODE_READ_BLOCK_REQUEST:
1330 case TCODE_READ_QUADLET_RESPONSE:
1331 case TCODE_READ_BLOCK_RESPONSE:
1332 case TCODE_LOCK_REQUEST:
1333 case TCODE_LOCK_RESPONSE:
Kristian Høgsbergf319b6a2007-03-07 12:12:49 -05001334 header[0] = cpu_to_le32((packet->header[0] & 0xffff) |
1335 (packet->speed << 16));
1336 header[1] = cpu_to_le32((packet->header[1] & 0xffff) |
1337 (packet->header[0] & 0xffff0000));
1338 header[2] = cpu_to_le32(packet->header[2]);
Kristian Høgsberged568912006-12-19 19:58:35 -05001339
Kristian Høgsberged568912006-12-19 19:58:35 -05001340 if (TCODE_IS_BLOCK_PACKET(tcode))
Kristian Høgsbergf319b6a2007-03-07 12:12:49 -05001341 header[3] = cpu_to_le32(packet->header[3]);
Kristian Høgsberged568912006-12-19 19:58:35 -05001342 else
Kristian Høgsbergf319b6a2007-03-07 12:12:49 -05001343 header[3] = (__force __le32) packet->header[3];
1344
1345 d[0].req_count = cpu_to_le16(packet->header_length);
Jay Fenlasonf8c22872009-03-05 19:08:40 +01001346 break;
1347
Clemens Ladisch5b06db12010-11-30 08:24:47 +01001348 case TCODE_LINK_INTERNAL:
Kristian Høgsbergf319b6a2007-03-07 12:12:49 -05001349 header[0] = cpu_to_le32((OHCI1394_phy_tcode << 4) |
1350 (packet->speed << 16));
Clemens Ladisch5b06db12010-11-30 08:24:47 +01001351 header[1] = cpu_to_le32(packet->header[1]);
1352 header[2] = cpu_to_le32(packet->header[2]);
Kristian Høgsbergf319b6a2007-03-07 12:12:49 -05001353 d[0].req_count = cpu_to_le16(12);
Stefan Richtercc550212010-07-18 13:00:50 +02001354
Clemens Ladisch5b06db12010-11-30 08:24:47 +01001355 if (is_ping_packet(&packet->header[1]))
Stefan Richtercc550212010-07-18 13:00:50 +02001356 d[0].control |= cpu_to_le16(DESCRIPTOR_PING);
Jay Fenlasonf8c22872009-03-05 19:08:40 +01001357 break;
1358
Clemens Ladisch5b06db12010-11-30 08:24:47 +01001359 case TCODE_STREAM_DATA:
Jay Fenlasonf8c22872009-03-05 19:08:40 +01001360 header[0] = cpu_to_le32((packet->header[0] & 0xffff) |
1361 (packet->speed << 16));
1362 header[1] = cpu_to_le32(packet->header[0] & 0xffff0000);
1363 d[0].req_count = cpu_to_le16(8);
1364 break;
1365
1366 default:
1367 /* BUG(); */
1368 packet->ack = RCODE_SEND_ERROR;
1369 return -1;
Kristian Høgsberged568912006-12-19 19:58:35 -05001370 }
1371
Clemens Ladischda289472011-04-11 09:57:54 +02001372 BUILD_BUG_ON(sizeof(struct driver_data) > sizeof(struct descriptor));
Kristian Høgsbergf319b6a2007-03-07 12:12:49 -05001373 driver_data = (struct driver_data *) &d[3];
1374 driver_data->packet = packet;
Kristian Høgsberg20d11672007-03-26 19:18:19 -04001375 packet->driver_data = driver_data;
Jarod Wilsona186b4a2007-12-03 13:43:12 -05001376
Kristian Høgsbergf319b6a2007-03-07 12:12:49 -05001377 if (packet->payload_length > 0) {
Clemens Ladischda289472011-04-11 09:57:54 +02001378 if (packet->payload_length > sizeof(driver_data->inline_data)) {
1379 payload_bus = dma_map_single(ohci->card.device,
1380 packet->payload,
1381 packet->payload_length,
1382 DMA_TO_DEVICE);
1383 if (dma_mapping_error(ohci->card.device, payload_bus)) {
1384 packet->ack = RCODE_SEND_ERROR;
1385 return -1;
1386 }
1387 packet->payload_bus = payload_bus;
1388 packet->payload_mapped = true;
1389 } else {
1390 memcpy(driver_data->inline_data, packet->payload,
1391 packet->payload_length);
1392 payload_bus = d_bus + 3 * sizeof(*d);
Kristian Høgsbergf319b6a2007-03-07 12:12:49 -05001393 }
1394
1395 d[2].req_count = cpu_to_le16(packet->payload_length);
1396 d[2].data_address = cpu_to_le32(payload_bus);
1397 last = &d[2];
1398 z = 3;
1399 } else {
1400 last = &d[0];
1401 z = 2;
1402 }
1403
Kristian Høgsberga77754a2007-05-07 20:33:35 -04001404 last->control |= cpu_to_le16(DESCRIPTOR_OUTPUT_LAST |
1405 DESCRIPTOR_IRQ_ALWAYS |
1406 DESCRIPTOR_BRANCH_ALWAYS);
Kristian Høgsbergf319b6a2007-03-07 12:12:49 -05001407
Stefan Richterb6258fc2011-02-26 15:08:35 +01001408 /* FIXME: Document how the locking works. */
1409 if (ohci->generation != packet->generation) {
Stefan Richter19593ff2009-10-14 20:40:10 +02001410 if (packet->payload_mapped)
Stefan Richterab88ca42007-08-29 19:40:28 +02001411 dma_unmap_single(ohci->card.device, payload_bus,
1412 packet->payload_length, DMA_TO_DEVICE);
Kristian Høgsbergf319b6a2007-03-07 12:12:49 -05001413 packet->ack = RCODE_GENERATION;
1414 return -1;
Kristian Høgsberged568912006-12-19 19:58:35 -05001415 }
Kristian Høgsberged568912006-12-19 19:58:35 -05001416
Kristian Høgsbergf319b6a2007-03-07 12:12:49 -05001417 context_append(ctx, d, z, 4 - z);
Kristian Høgsberged568912006-12-19 19:58:35 -05001418
Clemens Ladischdd6254e2011-05-16 08:10:10 +02001419 if (ctx->running)
Clemens Ladisch13882a82011-05-02 09:33:56 +02001420 reg_write(ohci, CONTROL_SET(ctx->regs), CONTEXT_WAKE);
Clemens Ladischdd6254e2011-05-16 08:10:10 +02001421 else
Kristian Høgsbergf319b6a2007-03-07 12:12:49 -05001422 context_run(ctx, 0);
Kristian Høgsberged568912006-12-19 19:58:35 -05001423
1424 return 0;
1425}
1426
Clemens Ladisch82b662d2010-12-24 14:40:15 +01001427static void at_context_flush(struct context *ctx)
1428{
1429 tasklet_disable(&ctx->tasklet);
1430
1431 ctx->flushing = true;
1432 context_tasklet((unsigned long)ctx);
1433 ctx->flushing = false;
1434
1435 tasklet_enable(&ctx->tasklet);
1436}
1437
Kristian Høgsbergf319b6a2007-03-07 12:12:49 -05001438static int handle_at_packet(struct context *context,
1439 struct descriptor *d,
1440 struct descriptor *last)
1441{
1442 struct driver_data *driver_data;
1443 struct fw_packet *packet;
1444 struct fw_ohci *ohci = context->ohci;
Kristian Høgsbergf319b6a2007-03-07 12:12:49 -05001445 int evt;
1446
Clemens Ladisch82b662d2010-12-24 14:40:15 +01001447 if (last->transfer_status == 0 && !context->flushing)
Kristian Høgsbergf319b6a2007-03-07 12:12:49 -05001448 /* This descriptor isn't done yet, stop iteration. */
1449 return 0;
1450
1451 driver_data = (struct driver_data *) &d[3];
1452 packet = driver_data->packet;
1453 if (packet == NULL)
1454 /* This packet was cancelled, just continue. */
1455 return 1;
1456
Stefan Richter19593ff2009-10-14 20:40:10 +02001457 if (packet->payload_mapped)
Stefan Richter1d1dc5e2008-12-10 00:20:38 +01001458 dma_unmap_single(ohci->card.device, packet->payload_bus,
Kristian Høgsbergf319b6a2007-03-07 12:12:49 -05001459 packet->payload_length, DMA_TO_DEVICE);
1460
1461 evt = le16_to_cpu(last->transfer_status) & 0x1f;
1462 packet->timestamp = le16_to_cpu(last->res_count);
1463
Stefan Richter64d21722011-12-20 21:32:46 +01001464 log_ar_at_event(ohci, 'T', packet->speed, packet->header, evt);
Stefan Richterad3c0fe2008-03-20 22:04:36 +01001465
Kristian Høgsbergf319b6a2007-03-07 12:12:49 -05001466 switch (evt) {
1467 case OHCI1394_evt_timeout:
1468 /* Async response transmit timed out. */
1469 packet->ack = RCODE_CANCELLED;
1470 break;
1471
1472 case OHCI1394_evt_flushed:
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001473 /*
1474 * The packet was flushed should give same error as
1475 * when we try to use a stale generation count.
1476 */
Kristian Høgsbergf319b6a2007-03-07 12:12:49 -05001477 packet->ack = RCODE_GENERATION;
1478 break;
1479
1480 case OHCI1394_evt_missing_ack:
Clemens Ladisch82b662d2010-12-24 14:40:15 +01001481 if (context->flushing)
1482 packet->ack = RCODE_GENERATION;
1483 else {
1484 /*
1485 * Using a valid (current) generation count, but the
1486 * node is not on the bus or not sending acks.
1487 */
1488 packet->ack = RCODE_NO_ACK;
1489 }
Kristian Høgsbergf319b6a2007-03-07 12:12:49 -05001490 break;
1491
1492 case ACK_COMPLETE + 0x10:
1493 case ACK_PENDING + 0x10:
1494 case ACK_BUSY_X + 0x10:
1495 case ACK_BUSY_A + 0x10:
1496 case ACK_BUSY_B + 0x10:
1497 case ACK_DATA_ERROR + 0x10:
1498 case ACK_TYPE_ERROR + 0x10:
1499 packet->ack = evt - 0x10;
1500 break;
1501
Clemens Ladisch82b662d2010-12-24 14:40:15 +01001502 case OHCI1394_evt_no_status:
1503 if (context->flushing) {
1504 packet->ack = RCODE_GENERATION;
1505 break;
1506 }
1507 /* fall through */
1508
Kristian Høgsbergf319b6a2007-03-07 12:12:49 -05001509 default:
1510 packet->ack = RCODE_SEND_ERROR;
1511 break;
1512 }
1513
1514 packet->callback(packet, &ohci->card, packet->ack);
1515
1516 return 1;
1517}
1518
Kristian Høgsberga77754a2007-05-07 20:33:35 -04001519#define HEADER_GET_DESTINATION(q) (((q) >> 16) & 0xffff)
1520#define HEADER_GET_TCODE(q) (((q) >> 4) & 0x0f)
1521#define HEADER_GET_OFFSET_HIGH(q) (((q) >> 0) & 0xffff)
1522#define HEADER_GET_DATA_LENGTH(q) (((q) >> 16) & 0xffff)
1523#define HEADER_GET_EXTENDED_TCODE(q) (((q) >> 0) & 0xffff)
Kristian Høgsberg93c4cce2007-01-26 00:38:26 -05001524
Stefan Richter53dca512008-12-14 21:47:04 +01001525static void handle_local_rom(struct fw_ohci *ohci,
1526 struct fw_packet *packet, u32 csr)
Kristian Høgsberg93c4cce2007-01-26 00:38:26 -05001527{
1528 struct fw_packet response;
1529 int tcode, length, i;
1530
Kristian Høgsberga77754a2007-05-07 20:33:35 -04001531 tcode = HEADER_GET_TCODE(packet->header[0]);
Kristian Høgsberg93c4cce2007-01-26 00:38:26 -05001532 if (TCODE_IS_BLOCK_PACKET(tcode))
Kristian Høgsberga77754a2007-05-07 20:33:35 -04001533 length = HEADER_GET_DATA_LENGTH(packet->header[3]);
Kristian Høgsberg93c4cce2007-01-26 00:38:26 -05001534 else
1535 length = 4;
1536
1537 i = csr - CSR_CONFIG_ROM;
1538 if (i + length > CONFIG_ROM_SIZE) {
1539 fw_fill_response(&response, packet->header,
1540 RCODE_ADDRESS_ERROR, NULL, 0);
1541 } else if (!TCODE_IS_READ_REQUEST(tcode)) {
1542 fw_fill_response(&response, packet->header,
1543 RCODE_TYPE_ERROR, NULL, 0);
1544 } else {
1545 fw_fill_response(&response, packet->header, RCODE_COMPLETE,
1546 (void *) ohci->config_rom + i, length);
1547 }
1548
1549 fw_core_handle_response(&ohci->card, &response);
1550}
1551
Stefan Richter53dca512008-12-14 21:47:04 +01001552static void handle_local_lock(struct fw_ohci *ohci,
1553 struct fw_packet *packet, u32 csr)
Kristian Høgsberg93c4cce2007-01-26 00:38:26 -05001554{
1555 struct fw_packet response;
Clemens Ladische1393662010-04-12 10:35:44 +02001556 int tcode, length, ext_tcode, sel, try;
Kristian Høgsberg93c4cce2007-01-26 00:38:26 -05001557 __be32 *payload, lock_old;
1558 u32 lock_arg, lock_data;
1559
Kristian Høgsberga77754a2007-05-07 20:33:35 -04001560 tcode = HEADER_GET_TCODE(packet->header[0]);
1561 length = HEADER_GET_DATA_LENGTH(packet->header[3]);
Kristian Høgsberg93c4cce2007-01-26 00:38:26 -05001562 payload = packet->payload;
Kristian Høgsberga77754a2007-05-07 20:33:35 -04001563 ext_tcode = HEADER_GET_EXTENDED_TCODE(packet->header[3]);
Kristian Høgsberg93c4cce2007-01-26 00:38:26 -05001564
1565 if (tcode == TCODE_LOCK_REQUEST &&
1566 ext_tcode == EXTCODE_COMPARE_SWAP && length == 8) {
1567 lock_arg = be32_to_cpu(payload[0]);
1568 lock_data = be32_to_cpu(payload[1]);
1569 } else if (tcode == TCODE_READ_QUADLET_REQUEST) {
1570 lock_arg = 0;
1571 lock_data = 0;
1572 } else {
1573 fw_fill_response(&response, packet->header,
1574 RCODE_TYPE_ERROR, NULL, 0);
1575 goto out;
1576 }
1577
1578 sel = (csr - CSR_BUS_MANAGER_ID) / 4;
1579 reg_write(ohci, OHCI1394_CSRData, lock_data);
1580 reg_write(ohci, OHCI1394_CSRCompareData, lock_arg);
1581 reg_write(ohci, OHCI1394_CSRControl, sel);
1582
Clemens Ladische1393662010-04-12 10:35:44 +02001583 for (try = 0; try < 20; try++)
1584 if (reg_read(ohci, OHCI1394_CSRControl) & 0x80000000) {
1585 lock_old = cpu_to_be32(reg_read(ohci,
1586 OHCI1394_CSRData));
1587 fw_fill_response(&response, packet->header,
1588 RCODE_COMPLETE,
1589 &lock_old, sizeof(lock_old));
1590 goto out;
1591 }
Kristian Høgsberg93c4cce2007-01-26 00:38:26 -05001592
Peter Hurleyde97cb62013-03-26 11:54:06 -04001593 ohci_err(ohci, "swap not done (CSR lock timeout)\n");
Clemens Ladische1393662010-04-12 10:35:44 +02001594 fw_fill_response(&response, packet->header, RCODE_BUSY, NULL, 0);
1595
Kristian Høgsberg93c4cce2007-01-26 00:38:26 -05001596 out:
1597 fw_core_handle_response(&ohci->card, &response);
1598}
1599
Stefan Richter53dca512008-12-14 21:47:04 +01001600static void handle_local_request(struct context *ctx, struct fw_packet *packet)
Kristian Høgsberg93c4cce2007-01-26 00:38:26 -05001601{
Clemens Ladisch26082032010-04-12 10:35:30 +02001602 u64 offset, csr;
Kristian Høgsberg93c4cce2007-01-26 00:38:26 -05001603
Kristian Høgsberg473d28c2007-03-07 12:12:55 -05001604 if (ctx == &ctx->ohci->at_request_ctx) {
1605 packet->ack = ACK_PENDING;
1606 packet->callback(packet, &ctx->ohci->card, packet->ack);
1607 }
Kristian Høgsberg93c4cce2007-01-26 00:38:26 -05001608
1609 offset =
1610 ((unsigned long long)
Kristian Høgsberga77754a2007-05-07 20:33:35 -04001611 HEADER_GET_OFFSET_HIGH(packet->header[1]) << 32) |
Kristian Høgsberg93c4cce2007-01-26 00:38:26 -05001612 packet->header[2];
1613 csr = offset - CSR_REGISTER_BASE;
1614
1615 /* Handle config rom reads. */
1616 if (csr >= CSR_CONFIG_ROM && csr < CSR_CONFIG_ROM_END)
1617 handle_local_rom(ctx->ohci, packet, csr);
1618 else switch (csr) {
1619 case CSR_BUS_MANAGER_ID:
1620 case CSR_BANDWIDTH_AVAILABLE:
1621 case CSR_CHANNELS_AVAILABLE_HI:
1622 case CSR_CHANNELS_AVAILABLE_LO:
1623 handle_local_lock(ctx->ohci, packet, csr);
1624 break;
1625 default:
1626 if (ctx == &ctx->ohci->at_request_ctx)
1627 fw_core_handle_request(&ctx->ohci->card, packet);
1628 else
1629 fw_core_handle_response(&ctx->ohci->card, packet);
1630 break;
1631 }
Kristian Høgsberg473d28c2007-03-07 12:12:55 -05001632
1633 if (ctx == &ctx->ohci->at_response_ctx) {
1634 packet->ack = ACK_COMPLETE;
1635 packet->callback(packet, &ctx->ohci->card, packet->ack);
1636 }
Kristian Høgsberg93c4cce2007-01-26 00:38:26 -05001637}
Kristian Høgsberge636fe22007-01-26 00:38:04 -05001638
Stefan Richter53dca512008-12-14 21:47:04 +01001639static void at_context_transmit(struct context *ctx, struct fw_packet *packet)
Kristian Høgsberged568912006-12-19 19:58:35 -05001640{
Kristian Høgsberged568912006-12-19 19:58:35 -05001641 unsigned long flags;
Stefan Richter2dbd7d72008-12-14 21:45:45 +01001642 int ret;
Kristian Høgsberged568912006-12-19 19:58:35 -05001643
1644 spin_lock_irqsave(&ctx->ohci->lock, flags);
1645
Kristian Høgsberga77754a2007-05-07 20:33:35 -04001646 if (HEADER_GET_DESTINATION(packet->header[0]) == ctx->ohci->node_id &&
Kristian Høgsberge636fe22007-01-26 00:38:04 -05001647 ctx->ohci->generation == packet->generation) {
Kristian Høgsberg93c4cce2007-01-26 00:38:26 -05001648 spin_unlock_irqrestore(&ctx->ohci->lock, flags);
1649 handle_local_request(ctx, packet);
1650 return;
Kristian Høgsberge636fe22007-01-26 00:38:04 -05001651 }
Kristian Høgsberged568912006-12-19 19:58:35 -05001652
Stefan Richter2dbd7d72008-12-14 21:45:45 +01001653 ret = at_context_queue_packet(ctx, packet);
Kristian Høgsberged568912006-12-19 19:58:35 -05001654 spin_unlock_irqrestore(&ctx->ohci->lock, flags);
1655
Stefan Richter2dbd7d72008-12-14 21:45:45 +01001656 if (ret < 0)
Kristian Høgsbergf319b6a2007-03-07 12:12:49 -05001657 packet->callback(packet, &ctx->ohci->card, packet->ack);
Jarod Wilsona186b4a2007-12-03 13:43:12 -05001658
Kristian Høgsberged568912006-12-19 19:58:35 -05001659}
1660
Clemens Ladischf117a3e2011-01-10 17:21:35 +01001661static void detect_dead_context(struct fw_ohci *ohci,
1662 const char *name, unsigned int regs)
1663{
1664 u32 ctl;
1665
1666 ctl = reg_read(ohci, CONTROL_SET(regs));
Stefan Richtercfda62b2012-03-04 21:34:21 +01001667 if (ctl & CONTEXT_DEAD)
Peter Hurleyde97cb62013-03-26 11:54:06 -04001668 ohci_err(ohci, "DMA context %s has stopped, error code: %s\n",
Stefan Richter64d21722011-12-20 21:32:46 +01001669 name, evts[ctl & 0x1f]);
Clemens Ladischf117a3e2011-01-10 17:21:35 +01001670}
1671
1672static void handle_dead_contexts(struct fw_ohci *ohci)
1673{
1674 unsigned int i;
1675 char name[8];
1676
1677 detect_dead_context(ohci, "ATReq", OHCI1394_AsReqTrContextBase);
1678 detect_dead_context(ohci, "ATRsp", OHCI1394_AsRspTrContextBase);
1679 detect_dead_context(ohci, "ARReq", OHCI1394_AsReqRcvContextBase);
1680 detect_dead_context(ohci, "ARRsp", OHCI1394_AsRspRcvContextBase);
1681 for (i = 0; i < 32; ++i) {
1682 if (!(ohci->it_context_support & (1 << i)))
1683 continue;
1684 sprintf(name, "IT%u", i);
1685 detect_dead_context(ohci, name, OHCI1394_IsoXmitContextBase(i));
1686 }
1687 for (i = 0; i < 32; ++i) {
1688 if (!(ohci->ir_context_support & (1 << i)))
1689 continue;
1690 sprintf(name, "IR%u", i);
1691 detect_dead_context(ohci, name, OHCI1394_IsoRcvContextBase(i));
1692 }
1693 /* TODO: maybe try to flush and restart the dead contexts */
1694}
1695
Clemens Ladischa48777e2010-06-10 08:33:07 +02001696static u32 cycle_timer_ticks(u32 cycle_timer)
1697{
1698 u32 ticks;
1699
1700 ticks = cycle_timer & 0xfff;
1701 ticks += 3072 * ((cycle_timer >> 12) & 0x1fff);
1702 ticks += (3072 * 8000) * (cycle_timer >> 25);
1703
1704 return ticks;
1705}
1706
1707/*
1708 * Some controllers exhibit one or more of the following bugs when updating the
1709 * iso cycle timer register:
1710 * - When the lowest six bits are wrapping around to zero, a read that happens
1711 * at the same time will return garbage in the lowest ten bits.
1712 * - When the cycleOffset field wraps around to zero, the cycleCount field is
1713 * not incremented for about 60 ns.
1714 * - Occasionally, the entire register reads zero.
1715 *
1716 * To catch these, we read the register three times and ensure that the
1717 * difference between each two consecutive reads is approximately the same, i.e.
1718 * less than twice the other. Furthermore, any negative difference indicates an
1719 * error. (A PCI read should take at least 20 ticks of the 24.576 MHz timer to
1720 * execute, so we have enough precision to compute the ratio of the differences.)
1721 */
1722static u32 get_cycle_time(struct fw_ohci *ohci)
1723{
1724 u32 c0, c1, c2;
1725 u32 t0, t1, t2;
1726 s32 diff01, diff12;
1727 int i;
1728
1729 c2 = reg_read(ohci, OHCI1394_IsochronousCycleTimer);
1730
1731 if (ohci->quirks & QUIRK_CYCLE_TIMER) {
1732 i = 0;
1733 c1 = c2;
1734 c2 = reg_read(ohci, OHCI1394_IsochronousCycleTimer);
1735 do {
1736 c0 = c1;
1737 c1 = c2;
1738 c2 = reg_read(ohci, OHCI1394_IsochronousCycleTimer);
1739 t0 = cycle_timer_ticks(c0);
1740 t1 = cycle_timer_ticks(c1);
1741 t2 = cycle_timer_ticks(c2);
1742 diff01 = t1 - t0;
1743 diff12 = t2 - t1;
1744 } while ((diff01 <= 0 || diff12 <= 0 ||
1745 diff01 / diff12 >= 2 || diff12 / diff01 >= 2)
1746 && i++ < 20);
1747 }
1748
1749 return c2;
1750}
1751
1752/*
1753 * This function has to be called at least every 64 seconds. The bus_time
1754 * field stores not only the upper 25 bits of the BUS_TIME register but also
1755 * the most significant bit of the cycle timer in bit 6 so that we can detect
1756 * changes in this bit.
1757 */
1758static u32 update_bus_time(struct fw_ohci *ohci)
1759{
1760 u32 cycle_time_seconds = get_cycle_time(ohci) >> 25;
1761
Clemens Ladisch9d60ef22012-05-24 19:29:19 +02001762 if (unlikely(!ohci->bus_time_running)) {
1763 reg_write(ohci, OHCI1394_IntMaskSet, OHCI1394_cycle64Seconds);
1764 ohci->bus_time = (lower_32_bits(get_seconds()) & ~0x7f) |
1765 (cycle_time_seconds & 0x40);
1766 ohci->bus_time_running = true;
1767 }
1768
Clemens Ladischa48777e2010-06-10 08:33:07 +02001769 if ((ohci->bus_time & 0x40) != (cycle_time_seconds & 0x40))
1770 ohci->bus_time += 0x40;
1771
1772 return ohci->bus_time | cycle_time_seconds;
1773}
1774
Stephan Gatzka25935eb2011-09-12 22:23:53 +02001775static int get_status_for_port(struct fw_ohci *ohci, int port_index)
1776{
1777 int reg;
1778
1779 mutex_lock(&ohci->phy_reg_mutex);
1780 reg = write_phy_reg(ohci, 7, port_index);
Stefan Richter28897fb2011-09-19 00:17:37 +02001781 if (reg >= 0)
1782 reg = read_phy_reg(ohci, 8);
Stephan Gatzka25935eb2011-09-12 22:23:53 +02001783 mutex_unlock(&ohci->phy_reg_mutex);
1784 if (reg < 0)
1785 return reg;
1786
1787 switch (reg & 0x0f) {
1788 case 0x06:
1789 return 2; /* is child node (connected to parent node) */
1790 case 0x0e:
1791 return 3; /* is parent node (connected to child node) */
1792 }
1793 return 1; /* not connected */
1794}
1795
1796static int get_self_id_pos(struct fw_ohci *ohci, u32 self_id,
1797 int self_id_count)
1798{
1799 int i;
1800 u32 entry;
Stefan Richter28897fb2011-09-19 00:17:37 +02001801
Stephan Gatzka25935eb2011-09-12 22:23:53 +02001802 for (i = 0; i < self_id_count; i++) {
1803 entry = ohci->self_id_buffer[i];
1804 if ((self_id & 0xff000000) == (entry & 0xff000000))
1805 return -1;
1806 if ((self_id & 0xff000000) < (entry & 0xff000000))
1807 return i;
1808 }
1809 return i;
1810}
1811
Stephan Gatzka52439d62012-09-03 21:17:50 +02001812static int initiated_reset(struct fw_ohci *ohci)
1813{
1814 int reg;
1815 int ret = 0;
1816
1817 mutex_lock(&ohci->phy_reg_mutex);
1818 reg = write_phy_reg(ohci, 7, 0xe0); /* Select page 7 */
1819 if (reg >= 0) {
1820 reg = read_phy_reg(ohci, 8);
1821 reg |= 0x40;
1822 reg = write_phy_reg(ohci, 8, reg); /* set PMODE bit */
1823 if (reg >= 0) {
1824 reg = read_phy_reg(ohci, 12); /* read register 12 */
1825 if (reg >= 0) {
1826 if ((reg & 0x08) == 0x08) {
1827 /* bit 3 indicates "initiated reset" */
1828 ret = 0x2;
1829 }
1830 }
1831 }
1832 }
1833 mutex_unlock(&ohci->phy_reg_mutex);
1834 return ret;
1835}
1836
Stephan Gatzka25935eb2011-09-12 22:23:53 +02001837/*
Stefan Richter28897fb2011-09-19 00:17:37 +02001838 * TI TSB82AA2B and TSB12LV26 do not receive the selfID of a locally
1839 * attached TSB41BA3D phy; see http://www.ti.com/litv/pdf/sllz059.
1840 * Construct the selfID from phy register contents.
Stephan Gatzka25935eb2011-09-12 22:23:53 +02001841 */
Stephan Gatzka25935eb2011-09-12 22:23:53 +02001842static int find_and_insert_self_id(struct fw_ohci *ohci, int self_id_count)
1843{
Stefan Richter28897fb2011-09-19 00:17:37 +02001844 int reg, i, pos, status;
1845 /* link active 1, speed 3, bridge 0, contender 1, more packets 0 */
1846 u32 self_id = 0x8040c800;
Stephan Gatzka25935eb2011-09-12 22:23:53 +02001847
1848 reg = reg_read(ohci, OHCI1394_NodeID);
1849 if (!(reg & OHCI1394_NodeID_idValid)) {
Peter Hurleyde97cb62013-03-26 11:54:06 -04001850 ohci_notice(ohci,
1851 "node ID not valid, new bus reset in progress\n");
Stephan Gatzka25935eb2011-09-12 22:23:53 +02001852 return -EBUSY;
1853 }
1854 self_id |= ((reg & 0x3f) << 24); /* phy ID */
1855
Stefan Richter28897fb2011-09-19 00:17:37 +02001856 reg = ohci_read_phy_reg(&ohci->card, 4);
Stephan Gatzka25935eb2011-09-12 22:23:53 +02001857 if (reg < 0)
1858 return reg;
1859 self_id |= ((reg & 0x07) << 8); /* power class */
1860
Stefan Richter28897fb2011-09-19 00:17:37 +02001861 reg = ohci_read_phy_reg(&ohci->card, 1);
Stephan Gatzka25935eb2011-09-12 22:23:53 +02001862 if (reg < 0)
1863 return reg;
1864 self_id |= ((reg & 0x3f) << 16); /* gap count */
1865
1866 for (i = 0; i < 3; i++) {
1867 status = get_status_for_port(ohci, i);
1868 if (status < 0)
1869 return status;
1870 self_id |= ((status & 0x3) << (6 - (i * 2)));
1871 }
1872
Stephan Gatzka52439d62012-09-03 21:17:50 +02001873 self_id |= initiated_reset(ohci);
1874
Stephan Gatzka25935eb2011-09-12 22:23:53 +02001875 pos = get_self_id_pos(ohci, self_id, self_id_count);
1876 if (pos >= 0) {
1877 memmove(&(ohci->self_id_buffer[pos+1]),
1878 &(ohci->self_id_buffer[pos]),
1879 (self_id_count - pos) * sizeof(*ohci->self_id_buffer));
1880 ohci->self_id_buffer[pos] = self_id;
1881 self_id_count++;
1882 }
1883 return self_id_count;
1884}
1885
Stephan Gatzka2d7a36e2011-07-25 22:16:24 +02001886static void bus_reset_work(struct work_struct *work)
Kristian Høgsberged568912006-12-19 19:58:35 -05001887{
Stephan Gatzka2d7a36e2011-07-25 22:16:24 +02001888 struct fw_ohci *ohci =
1889 container_of(work, struct fw_ohci, bus_reset_work);
Stefan Richterd713dfa2012-04-09 21:39:53 +02001890 int self_id_count, generation, new_generation, i, j;
1891 u32 reg;
Stefan Richter4eaff7d2007-07-25 19:18:08 +02001892 void *free_rom = NULL;
1893 dma_addr_t free_rom_bus = 0;
Clemens Ladisch4ffb7a62010-06-10 08:36:37 +02001894 bool is_new_root;
Kristian Høgsberged568912006-12-19 19:58:35 -05001895
1896 reg = reg_read(ohci, OHCI1394_NodeID);
1897 if (!(reg & OHCI1394_NodeID_idValid)) {
Peter Hurleyde97cb62013-03-26 11:54:06 -04001898 ohci_notice(ohci,
1899 "node ID not valid, new bus reset in progress\n");
Kristian Høgsberged568912006-12-19 19:58:35 -05001900 return;
1901 }
Stefan Richter02ff8f82007-08-30 00:11:40 +02001902 if ((reg & OHCI1394_NodeID_nodeNumber) == 63) {
Peter Hurleyde97cb62013-03-26 11:54:06 -04001903 ohci_notice(ohci, "malconfigured bus\n");
Stefan Richter02ff8f82007-08-30 00:11:40 +02001904 return;
1905 }
1906 ohci->node_id = reg & (OHCI1394_NodeID_busNumber |
1907 OHCI1394_NodeID_nodeNumber);
Kristian Høgsberged568912006-12-19 19:58:35 -05001908
Clemens Ladisch4ffb7a62010-06-10 08:36:37 +02001909 is_new_root = (reg & OHCI1394_NodeID_root) != 0;
1910 if (!(ohci->is_root && is_new_root))
1911 reg_write(ohci, OHCI1394_LinkControlSet,
1912 OHCI1394_LinkControl_cycleMaster);
1913 ohci->is_root = is_new_root;
1914
Stefan Richterc8a9a492008-03-19 21:40:32 +01001915 reg = reg_read(ohci, OHCI1394_SelfIDCount);
1916 if (reg & OHCI1394_SelfIDCount_selfIDError) {
Peter Hurley67672132013-03-27 06:56:01 -04001917 ohci_notice(ohci, "self ID receive error\n");
Stefan Richterc8a9a492008-03-19 21:40:32 +01001918 return;
1919 }
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001920 /*
1921 * The count in the SelfIDCount register is the number of
Kristian Høgsberged568912006-12-19 19:58:35 -05001922 * bytes in the self ID receive buffer. Since we also receive
1923 * the inverted quadlets and a header quadlet, we shift one
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001924 * bit extra to get the actual number of self IDs.
1925 */
Stefan Richter928ec5f2009-09-06 18:49:17 +02001926 self_id_count = (reg >> 3) & 0xff;
Stephan Gatzka25935eb2011-09-12 22:23:53 +02001927
1928 if (self_id_count > 252) {
Peter Hurley67672132013-03-27 06:56:01 -04001929 ohci_notice(ohci, "bad selfIDSize (%08x)\n", reg);
Stefan Richter016bf3d2008-03-19 22:05:02 +01001930 return;
1931 }
Stephan Gatzka25935eb2011-09-12 22:23:53 +02001932
Stefan Richteraf531222013-08-05 15:10:38 +02001933 generation = (cond_le32_to_cpu(ohci->self_id[0]) >> 16) & 0xff;
Stefan Richteree71c2f2007-08-25 14:08:19 +02001934 rmb();
Kristian Høgsberged568912006-12-19 19:58:35 -05001935
1936 for (i = 1, j = 0; j < self_id_count; i += 2, j++) {
Stefan Richteraf531222013-08-05 15:10:38 +02001937 u32 id = cond_le32_to_cpu(ohci->self_id[i]);
1938 u32 id2 = cond_le32_to_cpu(ohci->self_id[i + 1]);
Peter Hurley67672132013-03-27 06:56:01 -04001939
1940 if (id != ~id2) {
Clemens Ladisch32eaeae2011-10-15 18:14:39 +02001941 /*
1942 * If the invalid data looks like a cycle start packet,
1943 * it's likely to be the result of the cycle master
1944 * having a wrong gap count. In this case, the self IDs
1945 * so far are valid and should be processed so that the
1946 * bus manager can then correct the gap count.
1947 */
Peter Hurley67672132013-03-27 06:56:01 -04001948 if (id == 0xffff008f) {
1949 ohci_notice(ohci, "ignoring spurious self IDs\n");
Clemens Ladisch32eaeae2011-10-15 18:14:39 +02001950 self_id_count = j;
1951 break;
Clemens Ladisch32eaeae2011-10-15 18:14:39 +02001952 }
Peter Hurley67672132013-03-27 06:56:01 -04001953
1954 ohci_notice(ohci, "bad self ID %d/%d (%08x != ~%08x)\n",
1955 j, self_id_count, id, id2);
1956 return;
Stefan Richterc8a9a492008-03-19 21:40:32 +01001957 }
Peter Hurley67672132013-03-27 06:56:01 -04001958 ohci->self_id_buffer[j] = id;
Kristian Høgsberged568912006-12-19 19:58:35 -05001959 }
Stephan Gatzka25935eb2011-09-12 22:23:53 +02001960
1961 if (ohci->quirks & QUIRK_TI_SLLZ059) {
1962 self_id_count = find_and_insert_self_id(ohci, self_id_count);
1963 if (self_id_count < 0) {
Peter Hurleyde97cb62013-03-26 11:54:06 -04001964 ohci_notice(ohci,
1965 "could not construct local self ID\n");
Stephan Gatzka25935eb2011-09-12 22:23:53 +02001966 return;
1967 }
1968 }
1969
1970 if (self_id_count == 0) {
Peter Hurley67672132013-03-27 06:56:01 -04001971 ohci_notice(ohci, "no self IDs\n");
Stephan Gatzka25935eb2011-09-12 22:23:53 +02001972 return;
1973 }
Stefan Richteree71c2f2007-08-25 14:08:19 +02001974 rmb();
Kristian Høgsberged568912006-12-19 19:58:35 -05001975
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001976 /*
1977 * Check the consistency of the self IDs we just read. The
Kristian Høgsberged568912006-12-19 19:58:35 -05001978 * problem we face is that a new bus reset can start while we
1979 * read out the self IDs from the DMA buffer. If this happens,
1980 * the DMA buffer will be overwritten with new self IDs and we
1981 * will read out inconsistent data. The OHCI specification
1982 * (section 11.2) recommends a technique similar to
1983 * linux/seqlock.h, where we remember the generation of the
1984 * self IDs in the buffer before reading them out and compare
1985 * it to the current generation after reading them out. If
1986 * the two generations match we know we have a consistent set
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001987 * of self IDs.
1988 */
Kristian Høgsberged568912006-12-19 19:58:35 -05001989
1990 new_generation = (reg_read(ohci, OHCI1394_SelfIDCount) >> 16) & 0xff;
1991 if (new_generation != generation) {
Peter Hurleyde97cb62013-03-26 11:54:06 -04001992 ohci_notice(ohci, "new bus reset, discarding self ids\n");
Kristian Høgsberged568912006-12-19 19:58:35 -05001993 return;
1994 }
1995
1996 /* FIXME: Document how the locking works. */
Stefan Richter8a8c4732012-04-09 21:40:33 +02001997 spin_lock_irq(&ohci->lock);
Kristian Høgsberged568912006-12-19 19:58:35 -05001998
Clemens Ladisch82b662d2010-12-24 14:40:15 +01001999 ohci->generation = -1; /* prevent AT packet queueing */
Kristian Høgsbergf319b6a2007-03-07 12:12:49 -05002000 context_stop(&ohci->at_request_ctx);
2001 context_stop(&ohci->at_response_ctx);
Clemens Ladisch82b662d2010-12-24 14:40:15 +01002002
Stefan Richter8a8c4732012-04-09 21:40:33 +02002003 spin_unlock_irq(&ohci->lock);
Clemens Ladisch82b662d2010-12-24 14:40:15 +01002004
Stefan Richter78dec562011-01-01 15:15:40 +01002005 /*
2006 * Per OHCI 1.2 draft, clause 7.2.3.3, hardware may leave unsent
2007 * packets in the AT queues and software needs to drain them.
2008 * Some OHCI 1.1 controllers (JMicron) apparently require this too.
2009 */
Clemens Ladisch82b662d2010-12-24 14:40:15 +01002010 at_context_flush(&ohci->at_request_ctx);
2011 at_context_flush(&ohci->at_response_ctx);
2012
Stefan Richter8a8c4732012-04-09 21:40:33 +02002013 spin_lock_irq(&ohci->lock);
Clemens Ladisch82b662d2010-12-24 14:40:15 +01002014
2015 ohci->generation = generation;
Kristian Høgsberged568912006-12-19 19:58:35 -05002016 reg_write(ohci, OHCI1394_IntEventClear, OHCI1394_busReset);
2017
Stefan Richter4a635592010-02-21 17:58:01 +01002018 if (ohci->quirks & QUIRK_RESET_PACKET)
Stefan Richterd34316a2008-04-12 22:31:25 +02002019 ohci->request_generation = generation;
2020
Kristian Høgsbergc781c062007-05-07 20:33:32 -04002021 /*
2022 * This next bit is unrelated to the AT context stuff but we
Kristian Høgsberged568912006-12-19 19:58:35 -05002023 * have to do it under the spinlock also. If a new config rom
2024 * was set up before this reset, the old one is now no longer
2025 * in use and we can free it. Update the config rom pointers
2026 * to point to the current config rom and clear the
Thomas Weber88393162010-03-16 11:47:56 +01002027 * next_config_rom pointer so a new update can take place.
Kristian Høgsbergc781c062007-05-07 20:33:32 -04002028 */
Kristian Høgsberged568912006-12-19 19:58:35 -05002029
2030 if (ohci->next_config_rom != NULL) {
Kristian Høgsberg0bd243c2007-06-05 19:27:05 -04002031 if (ohci->next_config_rom != ohci->config_rom) {
2032 free_rom = ohci->config_rom;
2033 free_rom_bus = ohci->config_rom_bus;
2034 }
Kristian Høgsberged568912006-12-19 19:58:35 -05002035 ohci->config_rom = ohci->next_config_rom;
2036 ohci->config_rom_bus = ohci->next_config_rom_bus;
2037 ohci->next_config_rom = NULL;
2038
Kristian Høgsbergc781c062007-05-07 20:33:32 -04002039 /*
2040 * Restore config_rom image and manually update
Kristian Høgsberged568912006-12-19 19:58:35 -05002041 * config_rom registers. Writing the header quadlet
2042 * will indicate that the config rom is ready, so we
Kristian Høgsbergc781c062007-05-07 20:33:32 -04002043 * do that last.
2044 */
Kristian Høgsberged568912006-12-19 19:58:35 -05002045 reg_write(ohci, OHCI1394_BusOptions,
2046 be32_to_cpu(ohci->config_rom[2]));
Stefan Richter8e859732009-10-08 00:41:59 +02002047 ohci->config_rom[0] = ohci->next_header;
2048 reg_write(ohci, OHCI1394_ConfigROMhdr,
2049 be32_to_cpu(ohci->next_header));
Kristian Høgsberged568912006-12-19 19:58:35 -05002050 }
2051
Lubomir Rintel8bc588e2013-12-22 11:34:22 +01002052 if (param_remote_dma) {
2053 reg_write(ohci, OHCI1394_PhyReqFilterHiSet, ~0);
2054 reg_write(ohci, OHCI1394_PhyReqFilterLoSet, ~0);
2055 }
Stefan Richter080de8c2008-02-28 20:54:43 +01002056
Stefan Richter8a8c4732012-04-09 21:40:33 +02002057 spin_unlock_irq(&ohci->lock);
Kristian Høgsberged568912006-12-19 19:58:35 -05002058
Stefan Richter4eaff7d2007-07-25 19:18:08 +02002059 if (free_rom)
2060 dma_free_coherent(ohci->card.device, CONFIG_ROM_SIZE,
2061 free_rom, free_rom_bus);
2062
Stefan Richter64d21722011-12-20 21:32:46 +01002063 log_selfids(ohci, generation, self_id_count);
Stefan Richterad3c0fe2008-03-20 22:04:36 +01002064
Kristian Høgsberge636fe22007-01-26 00:38:04 -05002065 fw_core_handle_bus_reset(&ohci->card, ohci->node_id, generation,
Stefan Richterc8a94de2010-06-12 20:34:50 +02002066 self_id_count, ohci->self_id_buffer,
2067 ohci->csr_state_setclear_abdicate);
2068 ohci->csr_state_setclear_abdicate = false;
Kristian Høgsberged568912006-12-19 19:58:35 -05002069}
2070
2071static irqreturn_t irq_handler(int irq, void *data)
2072{
2073 struct fw_ohci *ohci = data;
Stefan Richter168cf9a2010-02-14 18:49:18 +01002074 u32 event, iso_event;
Kristian Høgsberged568912006-12-19 19:58:35 -05002075 int i;
2076
2077 event = reg_read(ohci, OHCI1394_IntEventClear);
2078
Stefan Richtera5159582007-06-09 19:31:14 +02002079 if (!event || !~event)
Kristian Høgsberged568912006-12-19 19:58:35 -05002080 return IRQ_NONE;
2081
Clemens Ladisch8327b372010-11-30 08:24:32 +01002082 /*
2083 * busReset and postedWriteErr must not be cleared yet
2084 * (OHCI 1.1 clauses 7.2.3.2 and 13.2.8.1)
2085 */
2086 reg_write(ohci, OHCI1394_IntEventClear,
2087 event & ~(OHCI1394_busReset | OHCI1394_postedWriteErr));
Stefan Richter64d21722011-12-20 21:32:46 +01002088 log_irqs(ohci, event);
Kristian Høgsberged568912006-12-19 19:58:35 -05002089
2090 if (event & OHCI1394_selfIDComplete)
Stephan Gatzkadb9ae8f2013-08-26 20:50:05 +02002091 queue_work(selfid_workqueue, &ohci->bus_reset_work);
Kristian Høgsberged568912006-12-19 19:58:35 -05002092
2093 if (event & OHCI1394_RQPkt)
2094 tasklet_schedule(&ohci->ar_request_ctx.tasklet);
2095
2096 if (event & OHCI1394_RSPkt)
2097 tasklet_schedule(&ohci->ar_response_ctx.tasklet);
2098
2099 if (event & OHCI1394_reqTxComplete)
2100 tasklet_schedule(&ohci->at_request_ctx.tasklet);
2101
2102 if (event & OHCI1394_respTxComplete)
2103 tasklet_schedule(&ohci->at_response_ctx.tasklet);
2104
Clemens Ladisch2dd5bed2010-11-30 08:25:05 +01002105 if (event & OHCI1394_isochRx) {
2106 iso_event = reg_read(ohci, OHCI1394_IsoRecvIntEventClear);
2107 reg_write(ohci, OHCI1394_IsoRecvIntEventClear, iso_event);
Kristian Høgsberged568912006-12-19 19:58:35 -05002108
Clemens Ladisch2dd5bed2010-11-30 08:25:05 +01002109 while (iso_event) {
2110 i = ffs(iso_event) - 1;
2111 tasklet_schedule(
2112 &ohci->ir_context_list[i].context.tasklet);
2113 iso_event &= ~(1 << i);
2114 }
Kristian Høgsberged568912006-12-19 19:58:35 -05002115 }
2116
Clemens Ladisch2dd5bed2010-11-30 08:25:05 +01002117 if (event & OHCI1394_isochTx) {
2118 iso_event = reg_read(ohci, OHCI1394_IsoXmitIntEventClear);
2119 reg_write(ohci, OHCI1394_IsoXmitIntEventClear, iso_event);
Kristian Høgsberged568912006-12-19 19:58:35 -05002120
Clemens Ladisch2dd5bed2010-11-30 08:25:05 +01002121 while (iso_event) {
2122 i = ffs(iso_event) - 1;
2123 tasklet_schedule(
2124 &ohci->it_context_list[i].context.tasklet);
2125 iso_event &= ~(1 << i);
2126 }
Kristian Høgsberged568912006-12-19 19:58:35 -05002127 }
2128
Jarod Wilson75f78322008-04-03 17:18:23 -04002129 if (unlikely(event & OHCI1394_regAccessFail))
Peter Hurleyde97cb62013-03-26 11:54:06 -04002130 ohci_err(ohci, "register access failure\n");
Jarod Wilson75f78322008-04-03 17:18:23 -04002131
Clemens Ladisch8327b372010-11-30 08:24:32 +01002132 if (unlikely(event & OHCI1394_postedWriteErr)) {
2133 reg_read(ohci, OHCI1394_PostedWriteAddressHi);
2134 reg_read(ohci, OHCI1394_PostedWriteAddressLo);
2135 reg_write(ohci, OHCI1394_IntEventClear,
2136 OHCI1394_postedWriteErr);
Stephan Gatzkaa74477d2011-09-26 21:44:30 +02002137 if (printk_ratelimit())
Peter Hurleyde97cb62013-03-26 11:54:06 -04002138 ohci_err(ohci, "PCI posted write error\n");
Clemens Ladisch8327b372010-11-30 08:24:32 +01002139 }
Stefan Richtere524f6162007-08-20 21:58:30 +02002140
Stefan Richterbb9f2202007-12-22 22:14:52 +01002141 if (unlikely(event & OHCI1394_cycleTooLong)) {
2142 if (printk_ratelimit())
Peter Hurleyde97cb62013-03-26 11:54:06 -04002143 ohci_notice(ohci, "isochronous cycle too long\n");
Stefan Richterbb9f2202007-12-22 22:14:52 +01002144 reg_write(ohci, OHCI1394_LinkControlSet,
2145 OHCI1394_LinkControl_cycleMaster);
2146 }
2147
Jay Fenlason5ed1f322009-11-17 12:29:17 -05002148 if (unlikely(event & OHCI1394_cycleInconsistent)) {
2149 /*
2150 * We need to clear this event bit in order to make
2151 * cycleMatch isochronous I/O work. In theory we should
2152 * stop active cycleMatch iso contexts now and restart
2153 * them at least two cycles later. (FIXME?)
2154 */
2155 if (printk_ratelimit())
Peter Hurleyde97cb62013-03-26 11:54:06 -04002156 ohci_notice(ohci, "isochronous cycle inconsistent\n");
Jay Fenlason5ed1f322009-11-17 12:29:17 -05002157 }
2158
Clemens Ladischf117a3e2011-01-10 17:21:35 +01002159 if (unlikely(event & OHCI1394_unrecoverableError))
2160 handle_dead_contexts(ohci);
2161
Clemens Ladischa48777e2010-06-10 08:33:07 +02002162 if (event & OHCI1394_cycle64Seconds) {
2163 spin_lock(&ohci->lock);
2164 update_bus_time(ohci);
2165 spin_unlock(&ohci->lock);
Clemens Ladische597e982010-11-30 08:24:19 +01002166 } else
2167 flush_writes(ohci);
Clemens Ladischa48777e2010-06-10 08:33:07 +02002168
Kristian Høgsberged568912006-12-19 19:58:35 -05002169 return IRQ_HANDLED;
2170}
2171
Kristian Høgsberg2aef4692007-05-30 19:06:35 -04002172static int software_reset(struct fw_ohci *ohci)
2173{
Stefan Richter9f426172011-07-03 17:39:26 +02002174 u32 val;
Kristian Høgsberg2aef4692007-05-30 19:06:35 -04002175 int i;
2176
2177 reg_write(ohci, OHCI1394_HCControlSet, OHCI1394_HCControl_softReset);
Stefan Richter9f426172011-07-03 17:39:26 +02002178 for (i = 0; i < 500; i++) {
2179 val = reg_read(ohci, OHCI1394_HCControlSet);
2180 if (!~val)
2181 return -ENODEV; /* Card was ejected. */
Kristian Høgsberg2aef4692007-05-30 19:06:35 -04002182
Stefan Richter9f426172011-07-03 17:39:26 +02002183 if (!(val & OHCI1394_HCControl_softReset))
Kristian Høgsberg2aef4692007-05-30 19:06:35 -04002184 return 0;
Stefan Richter9f426172011-07-03 17:39:26 +02002185
Kristian Høgsberg2aef4692007-05-30 19:06:35 -04002186 msleep(1);
2187 }
2188
2189 return -EBUSY;
2190}
2191
Stefan Richter8e859732009-10-08 00:41:59 +02002192static void copy_config_rom(__be32 *dest, const __be32 *src, size_t length)
2193{
2194 size_t size = length * 4;
2195
2196 memcpy(dest, src, size);
2197 if (size < CONFIG_ROM_SIZE)
2198 memset(&dest[length], 0, CONFIG_ROM_SIZE - size);
2199}
2200
Clemens Ladisch925e7a62010-04-04 15:19:54 +02002201static int configure_1394a_enhancements(struct fw_ohci *ohci)
2202{
2203 bool enable_1394a;
Stefan Richter35d999b2010-04-10 16:04:56 +02002204 int ret, clear, set, offset;
Clemens Ladisch925e7a62010-04-04 15:19:54 +02002205
2206 /* Check if the driver should configure link and PHY. */
2207 if (!(reg_read(ohci, OHCI1394_HCControlSet) &
2208 OHCI1394_HCControl_programPhyEnable))
2209 return 0;
2210
2211 /* Paranoia: check whether the PHY supports 1394a, too. */
2212 enable_1394a = false;
Stefan Richter35d999b2010-04-10 16:04:56 +02002213 ret = read_phy_reg(ohci, 2);
2214 if (ret < 0)
2215 return ret;
2216 if ((ret & PHY_EXTENDED_REGISTERS) == PHY_EXTENDED_REGISTERS) {
2217 ret = read_paged_phy_reg(ohci, 1, 8);
2218 if (ret < 0)
2219 return ret;
2220 if (ret >= 1)
Clemens Ladisch925e7a62010-04-04 15:19:54 +02002221 enable_1394a = true;
2222 }
2223
2224 if (ohci->quirks & QUIRK_NO_1394A)
2225 enable_1394a = false;
2226
2227 /* Configure PHY and link consistently. */
2228 if (enable_1394a) {
2229 clear = 0;
2230 set = PHY_ENABLE_ACCEL | PHY_ENABLE_MULTI;
2231 } else {
2232 clear = PHY_ENABLE_ACCEL | PHY_ENABLE_MULTI;
2233 set = 0;
2234 }
Stefan Richter02d37be2010-07-08 16:09:06 +02002235 ret = update_phy_reg(ohci, 5, clear, set);
Stefan Richter35d999b2010-04-10 16:04:56 +02002236 if (ret < 0)
2237 return ret;
Clemens Ladisch925e7a62010-04-04 15:19:54 +02002238
2239 if (enable_1394a)
2240 offset = OHCI1394_HCControlSet;
2241 else
2242 offset = OHCI1394_HCControlClear;
2243 reg_write(ohci, offset, OHCI1394_HCControl_aPhyEnhanceEnable);
2244
2245 /* Clean up: configuration has been taken care of. */
2246 reg_write(ohci, OHCI1394_HCControlClear,
2247 OHCI1394_HCControl_programPhyEnable);
2248
2249 return 0;
2250}
2251
Stephan Gatzka25935eb2011-09-12 22:23:53 +02002252static int probe_tsb41ba3d(struct fw_ohci *ohci)
2253{
Stefan Richterb810e4a2011-09-19 09:29:30 +02002254 /* TI vendor ID = 0x080028, TSB41BA3D product ID = 0x833005 (sic) */
2255 static const u8 id[] = { 0x08, 0x00, 0x28, 0x83, 0x30, 0x05, };
2256 int reg, i;
Stephan Gatzka25935eb2011-09-12 22:23:53 +02002257
2258 reg = read_phy_reg(ohci, 2);
2259 if (reg < 0)
2260 return reg;
Stefan Richterb810e4a2011-09-19 09:29:30 +02002261 if ((reg & PHY_EXTENDED_REGISTERS) != PHY_EXTENDED_REGISTERS)
2262 return 0;
Stephan Gatzka25935eb2011-09-12 22:23:53 +02002263
Stefan Richterb810e4a2011-09-19 09:29:30 +02002264 for (i = ARRAY_SIZE(id) - 1; i >= 0; i--) {
2265 reg = read_paged_phy_reg(ohci, 1, i + 10);
2266 if (reg < 0)
2267 return reg;
2268 if (reg != id[i])
2269 return 0;
Stephan Gatzka25935eb2011-09-12 22:23:53 +02002270 }
Stefan Richterb810e4a2011-09-19 09:29:30 +02002271 return 1;
Stephan Gatzka25935eb2011-09-12 22:23:53 +02002272}
2273
Stefan Richter8e859732009-10-08 00:41:59 +02002274static int ohci_enable(struct fw_card *card,
2275 const __be32 *config_rom, size_t length)
Kristian Høgsberged568912006-12-19 19:58:35 -05002276{
2277 struct fw_ohci *ohci = fw_ohci(card);
Clemens Ladisch9d60ef22012-05-24 19:29:19 +02002278 u32 lps, version, irqs;
Stefan Richter28897fb2011-09-19 00:17:37 +02002279 int i, ret;
Kristian Høgsberged568912006-12-19 19:58:35 -05002280
Kristian Høgsberg2aef4692007-05-30 19:06:35 -04002281 if (software_reset(ohci)) {
Peter Hurleyde97cb62013-03-26 11:54:06 -04002282 ohci_err(ohci, "failed to reset ohci card\n");
Kristian Høgsberg2aef4692007-05-30 19:06:35 -04002283 return -EBUSY;
2284 }
2285
2286 /*
2287 * Now enable LPS, which we need in order to start accessing
2288 * most of the registers. In fact, on some cards (ALI M5251),
2289 * accessing registers in the SClk domain without LPS enabled
2290 * will lock up the machine. Wait 50msec to make sure we have
Jarod Wilson02214722008-03-28 10:02:50 -04002291 * full link enabled. However, with some cards (well, at least
2292 * a JMicron PCIe card), we have to try again sometimes.
Peter Hurleybd972682013-04-28 23:24:08 +02002293 *
2294 * TI TSB82AA2 + TSB81BA3(A) cards signal LPS enabled early but
2295 * cannot actually use the phy at that time. These need tens of
2296 * millisecods pause between LPS write and first phy access too.
Kristian Høgsberg2aef4692007-05-30 19:06:35 -04002297 */
Peter Hurleybd972682013-04-28 23:24:08 +02002298
Kristian Høgsberg2aef4692007-05-30 19:06:35 -04002299 reg_write(ohci, OHCI1394_HCControlSet,
2300 OHCI1394_HCControl_LPS |
2301 OHCI1394_HCControl_postedWriteEnable);
2302 flush_writes(ohci);
Jarod Wilson02214722008-03-28 10:02:50 -04002303
Stefan Richter0ca49342014-03-06 20:39:04 +01002304 for (lps = 0, i = 0; !lps && i < 3; i++) {
Jarod Wilson02214722008-03-28 10:02:50 -04002305 msleep(50);
2306 lps = reg_read(ohci, OHCI1394_HCControlSet) &
2307 OHCI1394_HCControl_LPS;
2308 }
2309
2310 if (!lps) {
Peter Hurleyde97cb62013-03-26 11:54:06 -04002311 ohci_err(ohci, "failed to set Link Power Status\n");
Jarod Wilson02214722008-03-28 10:02:50 -04002312 return -EIO;
2313 }
Kristian Høgsberg2aef4692007-05-30 19:06:35 -04002314
Stephan Gatzka25935eb2011-09-12 22:23:53 +02002315 if (ohci->quirks & QUIRK_TI_SLLZ059) {
Stefan Richter28897fb2011-09-19 00:17:37 +02002316 ret = probe_tsb41ba3d(ohci);
2317 if (ret < 0)
2318 return ret;
2319 if (ret)
Peter Hurleyde97cb62013-03-26 11:54:06 -04002320 ohci_notice(ohci, "local TSB41BA3D phy\n");
Stefan Richter28897fb2011-09-19 00:17:37 +02002321 else
Stephan Gatzka25935eb2011-09-12 22:23:53 +02002322 ohci->quirks &= ~QUIRK_TI_SLLZ059;
Stephan Gatzka25935eb2011-09-12 22:23:53 +02002323 }
2324
Kristian Høgsberg2aef4692007-05-30 19:06:35 -04002325 reg_write(ohci, OHCI1394_HCControlClear,
2326 OHCI1394_HCControl_noByteSwapData);
2327
Stefan Richteraffc9c22008-06-05 20:50:53 +02002328 reg_write(ohci, OHCI1394_SelfIDBuffer, ohci->self_id_bus);
Kristian Høgsberg2aef4692007-05-30 19:06:35 -04002329 reg_write(ohci, OHCI1394_LinkControlSet,
Kristian Høgsberg2aef4692007-05-30 19:06:35 -04002330 OHCI1394_LinkControl_cycleTimerEnable |
2331 OHCI1394_LinkControl_cycleMaster);
2332
2333 reg_write(ohci, OHCI1394_ATRetries,
2334 OHCI1394_MAX_AT_REQ_RETRIES |
2335 (OHCI1394_MAX_AT_RESP_RETRIES << 4) |
Clemens Ladisch27a23292010-06-10 08:34:13 +02002336 (OHCI1394_MAX_PHYS_RESP_RETRIES << 8) |
2337 (200 << 16));
Kristian Høgsberg2aef4692007-05-30 19:06:35 -04002338
Clemens Ladisch9d60ef22012-05-24 19:29:19 +02002339 ohci->bus_time_running = false;
Clemens Ladischa48777e2010-06-10 08:33:07 +02002340
Clemens Ladische18907c2012-06-13 22:29:20 +02002341 for (i = 0; i < 32; i++)
2342 if (ohci->ir_context_support & (1 << i))
2343 reg_write(ohci, OHCI1394_IsoRcvContextControlClear(i),
2344 IR_CONTEXT_MULTI_CHANNEL_MODE);
2345
Clemens Ladische91b2782010-06-10 08:40:49 +02002346 version = reg_read(ohci, OHCI1394_Version) & 0x00ff00ff;
2347 if (version >= OHCI_VERSION_1_1) {
2348 reg_write(ohci, OHCI1394_InitialChannelsAvailableHi,
2349 0xfffffffe);
Stefan Richterdb3c9cc2010-06-12 20:30:21 +02002350 card->broadcast_channel_auto_allocated = true;
Clemens Ladische91b2782010-06-10 08:40:49 +02002351 }
2352
Clemens Ladischa1a11322010-06-10 08:35:06 +02002353 /* Get implemented bits of the priority arbitration request counter. */
2354 reg_write(ohci, OHCI1394_FairnessControl, 0x3f);
2355 ohci->pri_req_max = reg_read(ohci, OHCI1394_FairnessControl) & 0x3f;
2356 reg_write(ohci, OHCI1394_FairnessControl, 0);
Stefan Richterdb3c9cc2010-06-12 20:30:21 +02002357 card->priority_budget_implemented = ohci->pri_req_max != 0;
Kristian Høgsberg2aef4692007-05-30 19:06:35 -04002358
Stefan Richterfcd46b32014-01-18 17:32:20 +01002359 reg_write(ohci, OHCI1394_PhyUpperBound, FW_MAX_PHYSICAL_RANGE >> 16);
Kristian Høgsberg2aef4692007-05-30 19:06:35 -04002360 reg_write(ohci, OHCI1394_IntEventClear, ~0);
2361 reg_write(ohci, OHCI1394_IntMaskClear, ~0);
Kristian Høgsberg2aef4692007-05-30 19:06:35 -04002362
Stefan Richter35d999b2010-04-10 16:04:56 +02002363 ret = configure_1394a_enhancements(ohci);
2364 if (ret < 0)
2365 return ret;
Clemens Ladisch925e7a62010-04-04 15:19:54 +02002366
Kristian Høgsberg2aef4692007-05-30 19:06:35 -04002367 /* Activate link_on bit and contender bit in our self ID packets.*/
Stefan Richter35d999b2010-04-10 16:04:56 +02002368 ret = ohci_update_phy_reg(card, 4, 0, PHY_LINK_ACTIVE | PHY_CONTENDER);
2369 if (ret < 0)
2370 return ret;
Kristian Høgsberg2aef4692007-05-30 19:06:35 -04002371
Kristian Høgsbergc781c062007-05-07 20:33:32 -04002372 /*
2373 * When the link is not yet enabled, the atomic config rom
Kristian Høgsberged568912006-12-19 19:58:35 -05002374 * update mechanism described below in ohci_set_config_rom()
2375 * is not active. We have to update ConfigRomHeader and
2376 * BusOptions manually, and the write to ConfigROMmap takes
2377 * effect immediately. We tie this to the enabling of the
2378 * link, so we have a valid config rom before enabling - the
2379 * OHCI requires that ConfigROMhdr and BusOptions have valid
2380 * values before enabling.
2381 *
2382 * However, when the ConfigROMmap is written, some controllers
2383 * always read back quadlets 0 and 2 from the config rom to
2384 * the ConfigRomHeader and BusOptions registers on bus reset.
2385 * They shouldn't do that in this initial case where the link
2386 * isn't enabled. This means we have to use the same
2387 * workaround here, setting the bus header to 0 and then write
2388 * the right values in the bus reset tasklet.
2389 */
2390
Kristian Høgsberg0bd243c2007-06-05 19:27:05 -04002391 if (config_rom) {
2392 ohci->next_config_rom =
2393 dma_alloc_coherent(ohci->card.device, CONFIG_ROM_SIZE,
2394 &ohci->next_config_rom_bus,
2395 GFP_KERNEL);
2396 if (ohci->next_config_rom == NULL)
2397 return -ENOMEM;
Kristian Høgsberged568912006-12-19 19:58:35 -05002398
Stefan Richter8e859732009-10-08 00:41:59 +02002399 copy_config_rom(ohci->next_config_rom, config_rom, length);
Kristian Høgsberg0bd243c2007-06-05 19:27:05 -04002400 } else {
2401 /*
2402 * In the suspend case, config_rom is NULL, which
2403 * means that we just reuse the old config rom.
2404 */
2405 ohci->next_config_rom = ohci->config_rom;
2406 ohci->next_config_rom_bus = ohci->config_rom_bus;
2407 }
Kristian Høgsberged568912006-12-19 19:58:35 -05002408
Stefan Richter8e859732009-10-08 00:41:59 +02002409 ohci->next_header = ohci->next_config_rom[0];
Kristian Høgsberged568912006-12-19 19:58:35 -05002410 ohci->next_config_rom[0] = 0;
2411 reg_write(ohci, OHCI1394_ConfigROMhdr, 0);
Kristian Høgsberg0bd243c2007-06-05 19:27:05 -04002412 reg_write(ohci, OHCI1394_BusOptions,
2413 be32_to_cpu(ohci->next_config_rom[2]));
Kristian Høgsberged568912006-12-19 19:58:35 -05002414 reg_write(ohci, OHCI1394_ConfigROMmap, ohci->next_config_rom_bus);
2415
2416 reg_write(ohci, OHCI1394_AsReqFilterHiSet, 0x80000000);
2417
Stefan Richter148c7862010-06-05 11:46:49 +02002418 irqs = OHCI1394_reqTxComplete | OHCI1394_respTxComplete |
2419 OHCI1394_RQPkt | OHCI1394_RSPkt |
2420 OHCI1394_isochTx | OHCI1394_isochRx |
2421 OHCI1394_postedWriteErr |
2422 OHCI1394_selfIDComplete |
2423 OHCI1394_regAccessFail |
Clemens Ladischf117a3e2011-01-10 17:21:35 +01002424 OHCI1394_cycleInconsistent |
2425 OHCI1394_unrecoverableError |
2426 OHCI1394_cycleTooLong |
Stefan Richter148c7862010-06-05 11:46:49 +02002427 OHCI1394_masterIntEnable;
2428 if (param_debug & OHCI_PARAM_DEBUG_BUSRESETS)
2429 irqs |= OHCI1394_busReset;
2430 reg_write(ohci, OHCI1394_IntMaskSet, irqs);
2431
Kristian Høgsberged568912006-12-19 19:58:35 -05002432 reg_write(ohci, OHCI1394_HCControlSet,
2433 OHCI1394_HCControl_linkEnable |
2434 OHCI1394_HCControl_BIBimageValid);
Clemens Ladischecf83282011-04-11 09:56:12 +02002435
2436 reg_write(ohci, OHCI1394_LinkControlSet,
2437 OHCI1394_LinkControl_rcvSelfID |
2438 OHCI1394_LinkControl_rcvPhyPkt);
2439
2440 ar_context_run(&ohci->ar_request_ctx);
Clemens Ladischdd6254e2011-05-16 08:10:10 +02002441 ar_context_run(&ohci->ar_response_ctx);
2442
2443 flush_writes(ohci);
Kristian Høgsberged568912006-12-19 19:58:35 -05002444
Stefan Richter02d37be2010-07-08 16:09:06 +02002445 /* We are ready to go, reset bus to finish initialization. */
2446 fw_schedule_bus_reset(&ohci->card, false, true);
Kristian Høgsberged568912006-12-19 19:58:35 -05002447
2448 return 0;
2449}
2450
Stefan Richter53dca512008-12-14 21:47:04 +01002451static int ohci_set_config_rom(struct fw_card *card,
Stefan Richter8e859732009-10-08 00:41:59 +02002452 const __be32 *config_rom, size_t length)
Kristian Høgsberged568912006-12-19 19:58:35 -05002453{
2454 struct fw_ohci *ohci;
Kristian Høgsberged568912006-12-19 19:58:35 -05002455 __be32 *next_config_rom;
Stefan Richterf5101d582008-03-14 00:27:49 +01002456 dma_addr_t uninitialized_var(next_config_rom_bus);
Kristian Høgsberged568912006-12-19 19:58:35 -05002457
2458 ohci = fw_ohci(card);
2459
Kristian Høgsbergc781c062007-05-07 20:33:32 -04002460 /*
2461 * When the OHCI controller is enabled, the config rom update
Kristian Høgsberged568912006-12-19 19:58:35 -05002462 * mechanism is a bit tricky, but easy enough to use. See
2463 * section 5.5.6 in the OHCI specification.
2464 *
2465 * The OHCI controller caches the new config rom address in a
2466 * shadow register (ConfigROMmapNext) and needs a bus reset
2467 * for the changes to take place. When the bus reset is
2468 * detected, the controller loads the new values for the
2469 * ConfigRomHeader and BusOptions registers from the specified
2470 * config rom and loads ConfigROMmap from the ConfigROMmapNext
2471 * shadow register. All automatically and atomically.
2472 *
2473 * Now, there's a twist to this story. The automatic load of
2474 * ConfigRomHeader and BusOptions doesn't honor the
2475 * noByteSwapData bit, so with a be32 config rom, the
2476 * controller will load be32 values in to these registers
2477 * during the atomic update, even on litte endian
2478 * architectures. The workaround we use is to put a 0 in the
2479 * header quadlet; 0 is endian agnostic and means that the
2480 * config rom isn't ready yet. In the bus reset tasklet we
2481 * then set up the real values for the two registers.
2482 *
2483 * We use ohci->lock to avoid racing with the code that sets
Stephan Gatzka2d7a36e2011-07-25 22:16:24 +02002484 * ohci->next_config_rom to NULL (see bus_reset_work).
Kristian Høgsberged568912006-12-19 19:58:35 -05002485 */
2486
2487 next_config_rom =
2488 dma_alloc_coherent(ohci->card.device, CONFIG_ROM_SIZE,
2489 &next_config_rom_bus, GFP_KERNEL);
2490 if (next_config_rom == NULL)
2491 return -ENOMEM;
2492
Stefan Richter8a8c4732012-04-09 21:40:33 +02002493 spin_lock_irq(&ohci->lock);
Kristian Høgsberged568912006-12-19 19:58:35 -05002494
B.J. Buchalter2e053a22011-05-02 13:33:42 -04002495 /*
2496 * If there is not an already pending config_rom update,
2497 * push our new allocation into the ohci->next_config_rom
2498 * and then mark the local variable as null so that we
2499 * won't deallocate the new buffer.
2500 *
2501 * OTOH, if there is a pending config_rom update, just
2502 * use that buffer with the new config_rom data, and
2503 * let this routine free the unused DMA allocation.
2504 */
2505
Kristian Høgsberged568912006-12-19 19:58:35 -05002506 if (ohci->next_config_rom == NULL) {
2507 ohci->next_config_rom = next_config_rom;
2508 ohci->next_config_rom_bus = next_config_rom_bus;
B.J. Buchalter2e053a22011-05-02 13:33:42 -04002509 next_config_rom = NULL;
Kristian Høgsberged568912006-12-19 19:58:35 -05002510 }
2511
B.J. Buchalter2e053a22011-05-02 13:33:42 -04002512 copy_config_rom(ohci->next_config_rom, config_rom, length);
2513
2514 ohci->next_header = config_rom[0];
2515 ohci->next_config_rom[0] = 0;
2516
2517 reg_write(ohci, OHCI1394_ConfigROMmap, ohci->next_config_rom_bus);
2518
Stefan Richter8a8c4732012-04-09 21:40:33 +02002519 spin_unlock_irq(&ohci->lock);
Kristian Høgsberged568912006-12-19 19:58:35 -05002520
B.J. Buchalter2e053a22011-05-02 13:33:42 -04002521 /* If we didn't use the DMA allocation, delete it. */
2522 if (next_config_rom != NULL)
2523 dma_free_coherent(ohci->card.device, CONFIG_ROM_SIZE,
2524 next_config_rom, next_config_rom_bus);
2525
Kristian Høgsbergc781c062007-05-07 20:33:32 -04002526 /*
2527 * Now initiate a bus reset to have the changes take
Kristian Høgsberged568912006-12-19 19:58:35 -05002528 * effect. We clean up the old config rom memory and DMA
2529 * mappings in the bus reset tasklet, since the OHCI
2530 * controller could need to access it before the bus reset
Kristian Høgsbergc781c062007-05-07 20:33:32 -04002531 * takes effect.
2532 */
Kristian Høgsberged568912006-12-19 19:58:35 -05002533
B.J. Buchalter2e053a22011-05-02 13:33:42 -04002534 fw_schedule_bus_reset(&ohci->card, true, true);
2535
2536 return 0;
Kristian Høgsberged568912006-12-19 19:58:35 -05002537}
2538
2539static void ohci_send_request(struct fw_card *card, struct fw_packet *packet)
2540{
2541 struct fw_ohci *ohci = fw_ohci(card);
2542
2543 at_context_transmit(&ohci->at_request_ctx, packet);
2544}
2545
2546static void ohci_send_response(struct fw_card *card, struct fw_packet *packet)
2547{
2548 struct fw_ohci *ohci = fw_ohci(card);
2549
2550 at_context_transmit(&ohci->at_response_ctx, packet);
2551}
2552
Kristian Høgsberg730c32f2007-02-06 14:49:32 -05002553static int ohci_cancel_packet(struct fw_card *card, struct fw_packet *packet)
2554{
2555 struct fw_ohci *ohci = fw_ohci(card);
Kristian Høgsbergf319b6a2007-03-07 12:12:49 -05002556 struct context *ctx = &ohci->at_request_ctx;
2557 struct driver_data *driver_data = packet->driver_data;
Stefan Richter2dbd7d72008-12-14 21:45:45 +01002558 int ret = -ENOENT;
Kristian Høgsberg730c32f2007-02-06 14:49:32 -05002559
Kristian Høgsbergf319b6a2007-03-07 12:12:49 -05002560 tasklet_disable(&ctx->tasklet);
Kristian Høgsberg730c32f2007-02-06 14:49:32 -05002561
Kristian Høgsbergf319b6a2007-03-07 12:12:49 -05002562 if (packet->ack != 0)
2563 goto out;
Kristian Høgsberg730c32f2007-02-06 14:49:32 -05002564
Stefan Richter19593ff2009-10-14 20:40:10 +02002565 if (packet->payload_mapped)
Stefan Richter1d1dc5e2008-12-10 00:20:38 +01002566 dma_unmap_single(ohci->card.device, packet->payload_bus,
2567 packet->payload_length, DMA_TO_DEVICE);
2568
Stefan Richter64d21722011-12-20 21:32:46 +01002569 log_ar_at_event(ohci, 'T', packet->speed, packet->header, 0x20);
Kristian Høgsbergf319b6a2007-03-07 12:12:49 -05002570 driver_data->packet = NULL;
2571 packet->ack = RCODE_CANCELLED;
2572 packet->callback(packet, &ohci->card, packet->ack);
Stefan Richter2dbd7d72008-12-14 21:45:45 +01002573 ret = 0;
Kristian Høgsbergf319b6a2007-03-07 12:12:49 -05002574 out:
2575 tasklet_enable(&ctx->tasklet);
Kristian Høgsberg730c32f2007-02-06 14:49:32 -05002576
Stefan Richter2dbd7d72008-12-14 21:45:45 +01002577 return ret;
Kristian Høgsberg730c32f2007-02-06 14:49:32 -05002578}
2579
Stefan Richter53dca512008-12-14 21:47:04 +01002580static int ohci_enable_phys_dma(struct fw_card *card,
2581 int node_id, int generation)
Kristian Høgsberged568912006-12-19 19:58:35 -05002582{
2583 struct fw_ohci *ohci = fw_ohci(card);
2584 unsigned long flags;
Stefan Richter2dbd7d72008-12-14 21:45:45 +01002585 int n, ret = 0;
Kristian Høgsberged568912006-12-19 19:58:35 -05002586
Lubomir Rintel8bc588e2013-12-22 11:34:22 +01002587 if (param_remote_dma)
2588 return 0;
2589
Kristian Høgsbergc781c062007-05-07 20:33:32 -04002590 /*
2591 * FIXME: Make sure this bitmask is cleared when we clear the busReset
2592 * interrupt bit. Clear physReqResourceAllBuses on bus reset.
2593 */
Kristian Høgsberged568912006-12-19 19:58:35 -05002594
2595 spin_lock_irqsave(&ohci->lock, flags);
2596
2597 if (ohci->generation != generation) {
Stefan Richter2dbd7d72008-12-14 21:45:45 +01002598 ret = -ESTALE;
Kristian Høgsberged568912006-12-19 19:58:35 -05002599 goto out;
2600 }
2601
Kristian Høgsbergc781c062007-05-07 20:33:32 -04002602 /*
2603 * Note, if the node ID contains a non-local bus ID, physical DMA is
2604 * enabled for _all_ nodes on remote buses.
2605 */
Stefan Richter907293d2007-01-23 21:11:43 +01002606
2607 n = (node_id & 0xffc0) == LOCAL_BUS ? node_id & 0x3f : 63;
2608 if (n < 32)
2609 reg_write(ohci, OHCI1394_PhyReqFilterLoSet, 1 << n);
2610 else
2611 reg_write(ohci, OHCI1394_PhyReqFilterHiSet, 1 << (n - 32));
2612
Kristian Høgsberged568912006-12-19 19:58:35 -05002613 flush_writes(ohci);
Kristian Høgsberged568912006-12-19 19:58:35 -05002614 out:
Stefan Richter6cad95f2007-01-21 20:46:45 +01002615 spin_unlock_irqrestore(&ohci->lock, flags);
Stefan Richter2dbd7d72008-12-14 21:45:45 +01002616
2617 return ret;
Kristian Høgsberged568912006-12-19 19:58:35 -05002618}
Stefan Richter373b2ed2007-03-04 14:45:18 +01002619
Stefan Richter0fcff4e2010-06-12 20:35:52 +02002620static u32 ohci_read_csr(struct fw_card *card, int csr_offset)
Kristian Høgsbergd60d7f12007-03-07 12:12:56 -05002621{
2622 struct fw_ohci *ohci = fw_ohci(card);
Clemens Ladischa48777e2010-06-10 08:33:07 +02002623 unsigned long flags;
2624 u32 value;
Kristian Høgsbergd60d7f12007-03-07 12:12:56 -05002625
Clemens Ladisch60d32972010-06-10 08:24:35 +02002626 switch (csr_offset) {
Clemens Ladisch4ffb7a62010-06-10 08:36:37 +02002627 case CSR_STATE_CLEAR:
2628 case CSR_STATE_SET:
Clemens Ladisch4ffb7a62010-06-10 08:36:37 +02002629 if (ohci->is_root &&
2630 (reg_read(ohci, OHCI1394_LinkControlSet) &
2631 OHCI1394_LinkControl_cycleMaster))
Stefan Richterc8a94de2010-06-12 20:34:50 +02002632 value = CSR_STATE_BIT_CMSTR;
Clemens Ladisch4ffb7a62010-06-10 08:36:37 +02002633 else
Stefan Richterc8a94de2010-06-12 20:34:50 +02002634 value = 0;
2635 if (ohci->csr_state_setclear_abdicate)
2636 value |= CSR_STATE_BIT_ABDICATE;
Stefan Richter4a9bde92010-02-20 22:24:43 +01002637
Stefan Richterc8a94de2010-06-12 20:34:50 +02002638 return value;
Clemens Ladisch4ffb7a62010-06-10 08:36:37 +02002639
Clemens Ladisch506f1a32010-06-10 08:25:19 +02002640 case CSR_NODE_IDS:
2641 return reg_read(ohci, OHCI1394_NodeID) << 16;
2642
Clemens Ladisch60d32972010-06-10 08:24:35 +02002643 case CSR_CYCLE_TIME:
2644 return get_cycle_time(ohci);
2645
Clemens Ladischa48777e2010-06-10 08:33:07 +02002646 case CSR_BUS_TIME:
2647 /*
2648 * We might be called just after the cycle timer has wrapped
2649 * around but just before the cycle64Seconds handler, so we
2650 * better check here, too, if the bus time needs to be updated.
2651 */
2652 spin_lock_irqsave(&ohci->lock, flags);
2653 value = update_bus_time(ohci);
2654 spin_unlock_irqrestore(&ohci->lock, flags);
2655 return value;
2656
Clemens Ladisch27a23292010-06-10 08:34:13 +02002657 case CSR_BUSY_TIMEOUT:
2658 value = reg_read(ohci, OHCI1394_ATRetries);
2659 return (value >> 4) & 0x0ffff00f;
2660
Clemens Ladischa1a11322010-06-10 08:35:06 +02002661 case CSR_PRIORITY_BUDGET:
2662 return (reg_read(ohci, OHCI1394_FairnessControl) & 0x3f) |
2663 (ohci->pri_req_max << 8);
2664
Clemens Ladisch60d32972010-06-10 08:24:35 +02002665 default:
2666 WARN_ON(1);
2667 return 0;
Clemens Ladischb6775322010-01-20 09:58:02 +01002668 }
Clemens Ladisch60d32972010-06-10 08:24:35 +02002669}
Kristian Høgsbergd60d7f12007-03-07 12:12:56 -05002670
Stefan Richter0fcff4e2010-06-12 20:35:52 +02002671static void ohci_write_csr(struct fw_card *card, int csr_offset, u32 value)
Clemens Ladisch506f1a32010-06-10 08:25:19 +02002672{
2673 struct fw_ohci *ohci = fw_ohci(card);
Clemens Ladischa48777e2010-06-10 08:33:07 +02002674 unsigned long flags;
Clemens Ladisch506f1a32010-06-10 08:25:19 +02002675
2676 switch (csr_offset) {
Clemens Ladisch4ffb7a62010-06-10 08:36:37 +02002677 case CSR_STATE_CLEAR:
Clemens Ladisch4ffb7a62010-06-10 08:36:37 +02002678 if ((value & CSR_STATE_BIT_CMSTR) && ohci->is_root) {
2679 reg_write(ohci, OHCI1394_LinkControlClear,
2680 OHCI1394_LinkControl_cycleMaster);
2681 flush_writes(ohci);
2682 }
Stefan Richterc8a94de2010-06-12 20:34:50 +02002683 if (value & CSR_STATE_BIT_ABDICATE)
2684 ohci->csr_state_setclear_abdicate = false;
Clemens Ladisch4ffb7a62010-06-10 08:36:37 +02002685 break;
2686
2687 case CSR_STATE_SET:
2688 if ((value & CSR_STATE_BIT_CMSTR) && ohci->is_root) {
2689 reg_write(ohci, OHCI1394_LinkControlSet,
2690 OHCI1394_LinkControl_cycleMaster);
2691 flush_writes(ohci);
2692 }
Stefan Richterc8a94de2010-06-12 20:34:50 +02002693 if (value & CSR_STATE_BIT_ABDICATE)
2694 ohci->csr_state_setclear_abdicate = true;
Clemens Ladisch4ffb7a62010-06-10 08:36:37 +02002695 break;
2696
Clemens Ladisch506f1a32010-06-10 08:25:19 +02002697 case CSR_NODE_IDS:
2698 reg_write(ohci, OHCI1394_NodeID, value >> 16);
2699 flush_writes(ohci);
2700 break;
2701
Clemens Ladisch9ab50712010-06-10 08:26:48 +02002702 case CSR_CYCLE_TIME:
2703 reg_write(ohci, OHCI1394_IsochronousCycleTimer, value);
2704 reg_write(ohci, OHCI1394_IntEventSet,
2705 OHCI1394_cycleInconsistent);
2706 flush_writes(ohci);
2707 break;
2708
Clemens Ladischa48777e2010-06-10 08:33:07 +02002709 case CSR_BUS_TIME:
2710 spin_lock_irqsave(&ohci->lock, flags);
Clemens Ladisch9d60ef22012-05-24 19:29:19 +02002711 ohci->bus_time = (update_bus_time(ohci) & 0x40) |
2712 (value & ~0x7f);
Clemens Ladischa48777e2010-06-10 08:33:07 +02002713 spin_unlock_irqrestore(&ohci->lock, flags);
2714 break;
2715
Clemens Ladisch27a23292010-06-10 08:34:13 +02002716 case CSR_BUSY_TIMEOUT:
2717 value = (value & 0xf) | ((value & 0xf) << 4) |
2718 ((value & 0xf) << 8) | ((value & 0x0ffff000) << 4);
2719 reg_write(ohci, OHCI1394_ATRetries, value);
2720 flush_writes(ohci);
2721 break;
2722
Clemens Ladischa1a11322010-06-10 08:35:06 +02002723 case CSR_PRIORITY_BUDGET:
2724 reg_write(ohci, OHCI1394_FairnessControl, value & 0x3f);
2725 flush_writes(ohci);
2726 break;
2727
Clemens Ladisch506f1a32010-06-10 08:25:19 +02002728 default:
2729 WARN_ON(1);
2730 break;
2731 }
Kristian Høgsbergd60d7f12007-03-07 12:12:56 -05002732}
2733
Clemens Ladisch910e76c2012-03-18 19:04:43 +01002734static void flush_iso_completions(struct iso_context *ctx)
David Moore1aa292b2008-07-22 23:23:40 -07002735{
Clemens Ladisch910e76c2012-03-18 19:04:43 +01002736 ctx->base.callback.sc(&ctx->base, ctx->last_timestamp,
2737 ctx->header_length, ctx->header,
2738 ctx->base.callback_data);
2739 ctx->header_length = 0;
2740}
David Moore1aa292b2008-07-22 23:23:40 -07002741
Clemens Ladisch73864012012-03-18 19:04:05 +01002742static void copy_iso_headers(struct iso_context *ctx, const u32 *dma_hdr)
David Moore1aa292b2008-07-22 23:23:40 -07002743{
Clemens Ladisch73864012012-03-18 19:04:05 +01002744 u32 *ctx_hdr;
David Moore1aa292b2008-07-22 23:23:40 -07002745
Clemens Ladisch0699a732013-07-22 21:32:09 +02002746 if (ctx->header_length + ctx->base.header_size > PAGE_SIZE) {
2747 if (ctx->base.drop_overflow_headers)
2748 return;
Clemens Ladisch18d62712012-03-18 19:05:29 +01002749 flush_iso_completions(ctx);
Clemens Ladisch0699a732013-07-22 21:32:09 +02002750 }
David Moore1aa292b2008-07-22 23:23:40 -07002751
Clemens Ladisch73864012012-03-18 19:04:05 +01002752 ctx_hdr = ctx->header + ctx->header_length;
Clemens Ladisch910e76c2012-03-18 19:04:43 +01002753 ctx->last_timestamp = (u16)le32_to_cpu((__force __le32)dma_hdr[0]);
David Moore1aa292b2008-07-22 23:23:40 -07002754
2755 /*
Clemens Ladisch32c507f2012-03-18 19:01:39 +01002756 * The two iso header quadlets are byteswapped to little
2757 * endian by the controller, but we want to present them
2758 * as big endian for consistency with the bus endianness.
David Moore1aa292b2008-07-22 23:23:40 -07002759 */
2760 if (ctx->base.header_size > 0)
Clemens Ladisch73864012012-03-18 19:04:05 +01002761 ctx_hdr[0] = swab32(dma_hdr[1]); /* iso packet header */
David Moore1aa292b2008-07-22 23:23:40 -07002762 if (ctx->base.header_size > 4)
Clemens Ladisch73864012012-03-18 19:04:05 +01002763 ctx_hdr[1] = swab32(dma_hdr[0]); /* timestamp */
David Moore1aa292b2008-07-22 23:23:40 -07002764 if (ctx->base.header_size > 8)
Clemens Ladisch73864012012-03-18 19:04:05 +01002765 memcpy(&ctx_hdr[2], &dma_hdr[2], ctx->base.header_size - 8);
David Moore1aa292b2008-07-22 23:23:40 -07002766 ctx->header_length += ctx->base.header_size;
2767}
2768
Jarod Wilsona186b4a2007-12-03 13:43:12 -05002769static int handle_ir_packet_per_buffer(struct context *context,
2770 struct descriptor *d,
2771 struct descriptor *last)
2772{
2773 struct iso_context *ctx =
2774 container_of(context, struct iso_context, context);
David Moorebcee8932007-12-19 15:26:38 -05002775 struct descriptor *pd;
Clemens Ladischa572e682011-10-15 23:12:23 +02002776 u32 buffer_dma;
Jarod Wilsona186b4a2007-12-03 13:43:12 -05002777
Stefan Richter872e3302010-07-29 18:19:22 +02002778 for (pd = d; pd <= last; pd++)
David Moorebcee8932007-12-19 15:26:38 -05002779 if (pd->transfer_status)
2780 break;
David Moorebcee8932007-12-19 15:26:38 -05002781 if (pd > last)
Jarod Wilsona186b4a2007-12-03 13:43:12 -05002782 /* Descriptor(s) not done yet, stop iteration */
2783 return 0;
2784
Clemens Ladischa572e682011-10-15 23:12:23 +02002785 while (!(d->control & cpu_to_le16(DESCRIPTOR_BRANCH_ALWAYS))) {
2786 d++;
2787 buffer_dma = le32_to_cpu(d->data_address);
2788 dma_sync_single_range_for_cpu(context->ohci->card.device,
2789 buffer_dma & PAGE_MASK,
2790 buffer_dma & ~PAGE_MASK,
2791 le16_to_cpu(d->req_count),
2792 DMA_FROM_DEVICE);
2793 }
2794
Clemens Ladisch910e76c2012-03-18 19:04:43 +01002795 copy_iso_headers(ctx, (u32 *) (last + 1));
Jarod Wilsona186b4a2007-12-03 13:43:12 -05002796
Clemens Ladisch910e76c2012-03-18 19:04:43 +01002797 if (last->control & cpu_to_le16(DESCRIPTOR_IRQ_ALWAYS))
2798 flush_iso_completions(ctx);
Jarod Wilsona186b4a2007-12-03 13:43:12 -05002799
Jarod Wilsona186b4a2007-12-03 13:43:12 -05002800 return 1;
2801}
2802
Stefan Richter872e3302010-07-29 18:19:22 +02002803/* d == last because each descriptor block is only a single descriptor. */
2804static int handle_ir_buffer_fill(struct context *context,
2805 struct descriptor *d,
2806 struct descriptor *last)
2807{
2808 struct iso_context *ctx =
2809 container_of(context, struct iso_context, context);
Clemens Ladischd1bbd202012-03-18 19:06:39 +01002810 unsigned int req_count, res_count, completed;
Clemens Ladischa572e682011-10-15 23:12:23 +02002811 u32 buffer_dma;
Stefan Richter872e3302010-07-29 18:19:22 +02002812
Clemens Ladischd1bbd202012-03-18 19:06:39 +01002813 req_count = le16_to_cpu(last->req_count);
2814 res_count = le16_to_cpu(ACCESS_ONCE(last->res_count));
2815 completed = req_count - res_count;
2816 buffer_dma = le32_to_cpu(last->data_address);
2817
2818 if (completed > 0) {
2819 ctx->mc_buffer_bus = buffer_dma;
2820 ctx->mc_completed = completed;
2821 }
2822
2823 if (res_count != 0)
Stefan Richter872e3302010-07-29 18:19:22 +02002824 /* Descriptor(s) not done yet, stop iteration */
2825 return 0;
2826
Clemens Ladischa572e682011-10-15 23:12:23 +02002827 dma_sync_single_range_for_cpu(context->ohci->card.device,
2828 buffer_dma & PAGE_MASK,
2829 buffer_dma & ~PAGE_MASK,
Clemens Ladischd1bbd202012-03-18 19:06:39 +01002830 completed, DMA_FROM_DEVICE);
Clemens Ladischa572e682011-10-15 23:12:23 +02002831
Clemens Ladischd1bbd202012-03-18 19:06:39 +01002832 if (last->control & cpu_to_le16(DESCRIPTOR_IRQ_ALWAYS)) {
Stefan Richter872e3302010-07-29 18:19:22 +02002833 ctx->base.callback.mc(&ctx->base,
Clemens Ladischd1bbd202012-03-18 19:06:39 +01002834 buffer_dma + completed,
Stefan Richter872e3302010-07-29 18:19:22 +02002835 ctx->base.callback_data);
Clemens Ladischd1bbd202012-03-18 19:06:39 +01002836 ctx->mc_completed = 0;
2837 }
Stefan Richter872e3302010-07-29 18:19:22 +02002838
2839 return 1;
2840}
2841
Clemens Ladischd1bbd202012-03-18 19:06:39 +01002842static void flush_ir_buffer_fill(struct iso_context *ctx)
2843{
2844 dma_sync_single_range_for_cpu(ctx->context.ohci->card.device,
2845 ctx->mc_buffer_bus & PAGE_MASK,
2846 ctx->mc_buffer_bus & ~PAGE_MASK,
2847 ctx->mc_completed, DMA_FROM_DEVICE);
2848
2849 ctx->base.callback.mc(&ctx->base,
2850 ctx->mc_buffer_bus + ctx->mc_completed,
2851 ctx->base.callback_data);
2852 ctx->mc_completed = 0;
2853}
2854
Clemens Ladischa572e682011-10-15 23:12:23 +02002855static inline void sync_it_packet_for_cpu(struct context *context,
2856 struct descriptor *pd)
2857{
2858 __le16 control;
2859 u32 buffer_dma;
2860
2861 /* only packets beginning with OUTPUT_MORE* have data buffers */
2862 if (pd->control & cpu_to_le16(DESCRIPTOR_BRANCH_ALWAYS))
2863 return;
2864
2865 /* skip over the OUTPUT_MORE_IMMEDIATE descriptor */
2866 pd += 2;
2867
2868 /*
2869 * If the packet has a header, the first OUTPUT_MORE/LAST descriptor's
2870 * data buffer is in the context program's coherent page and must not
2871 * be synced.
2872 */
2873 if ((le32_to_cpu(pd->data_address) & PAGE_MASK) ==
2874 (context->current_bus & PAGE_MASK)) {
2875 if (pd->control & cpu_to_le16(DESCRIPTOR_BRANCH_ALWAYS))
2876 return;
2877 pd++;
2878 }
2879
2880 do {
2881 buffer_dma = le32_to_cpu(pd->data_address);
2882 dma_sync_single_range_for_cpu(context->ohci->card.device,
2883 buffer_dma & PAGE_MASK,
2884 buffer_dma & ~PAGE_MASK,
2885 le16_to_cpu(pd->req_count),
2886 DMA_TO_DEVICE);
2887 control = pd->control;
2888 pd++;
2889 } while (!(control & cpu_to_le16(DESCRIPTOR_BRANCH_ALWAYS)));
2890}
2891
Kristian Høgsberg30200732007-02-16 17:34:39 -05002892static int handle_it_packet(struct context *context,
2893 struct descriptor *d,
2894 struct descriptor *last)
Kristian Høgsberged568912006-12-19 19:58:35 -05002895{
Kristian Høgsberg30200732007-02-16 17:34:39 -05002896 struct iso_context *ctx =
2897 container_of(context, struct iso_context, context);
Jay Fenlason31769ce2009-11-21 00:05:56 +01002898 struct descriptor *pd;
Clemens Ladisch73864012012-03-18 19:04:05 +01002899 __be32 *ctx_hdr;
Stefan Richter373b2ed2007-03-04 14:45:18 +01002900
Jay Fenlason31769ce2009-11-21 00:05:56 +01002901 for (pd = d; pd <= last; pd++)
2902 if (pd->transfer_status)
2903 break;
2904 if (pd > last)
2905 /* Descriptor(s) not done yet, stop iteration */
Kristian Høgsberg30200732007-02-16 17:34:39 -05002906 return 0;
Kristian Høgsberged568912006-12-19 19:58:35 -05002907
Clemens Ladischa572e682011-10-15 23:12:23 +02002908 sync_it_packet_for_cpu(context, d);
2909
Clemens Ladisch0699a732013-07-22 21:32:09 +02002910 if (ctx->header_length + 4 > PAGE_SIZE) {
2911 if (ctx->base.drop_overflow_headers)
2912 return 1;
Clemens Ladisch18d62712012-03-18 19:05:29 +01002913 flush_iso_completions(ctx);
Clemens Ladisch0699a732013-07-22 21:32:09 +02002914 }
Clemens Ladisch910e76c2012-03-18 19:04:43 +01002915
Clemens Ladisch18d62712012-03-18 19:05:29 +01002916 ctx_hdr = ctx->header + ctx->header_length;
Clemens Ladisch910e76c2012-03-18 19:04:43 +01002917 ctx->last_timestamp = le16_to_cpu(last->res_count);
Clemens Ladisch18d62712012-03-18 19:05:29 +01002918 /* Present this value as big-endian to match the receive code */
2919 *ctx_hdr = cpu_to_be32((le16_to_cpu(pd->transfer_status) << 16) |
2920 le16_to_cpu(pd->res_count));
2921 ctx->header_length += 4;
2922
Clemens Ladisch910e76c2012-03-18 19:04:43 +01002923 if (last->control & cpu_to_le16(DESCRIPTOR_IRQ_ALWAYS))
2924 flush_iso_completions(ctx);
2925
Kristian Høgsberg30200732007-02-16 17:34:39 -05002926 return 1;
Kristian Høgsberged568912006-12-19 19:58:35 -05002927}
2928
Stefan Richter872e3302010-07-29 18:19:22 +02002929static void set_multichannel_mask(struct fw_ohci *ohci, u64 channels)
2930{
2931 u32 hi = channels >> 32, lo = channels;
2932
2933 reg_write(ohci, OHCI1394_IRMultiChanMaskHiClear, ~hi);
2934 reg_write(ohci, OHCI1394_IRMultiChanMaskLoClear, ~lo);
2935 reg_write(ohci, OHCI1394_IRMultiChanMaskHiSet, hi);
2936 reg_write(ohci, OHCI1394_IRMultiChanMaskLoSet, lo);
2937 mmiowb();
2938 ohci->mc_channels = channels;
2939}
2940
Stefan Richter53dca512008-12-14 21:47:04 +01002941static struct fw_iso_context *ohci_allocate_iso_context(struct fw_card *card,
Stefan Richter4817ed22008-12-21 16:39:46 +01002942 int type, int channel, size_t header_size)
Kristian Høgsberged568912006-12-19 19:58:35 -05002943{
2944 struct fw_ohci *ohci = fw_ohci(card);
Stefan Richter872e3302010-07-29 18:19:22 +02002945 struct iso_context *uninitialized_var(ctx);
2946 descriptor_callback_t uninitialized_var(callback);
2947 u64 *uninitialized_var(channels);
2948 u32 *uninitialized_var(mask), uninitialized_var(regs);
Stefan Richter872e3302010-07-29 18:19:22 +02002949 int index, ret = -EBUSY;
Kristian Høgsberged568912006-12-19 19:58:35 -05002950
Stefan Richter8a8c4732012-04-09 21:40:33 +02002951 spin_lock_irq(&ohci->lock);
Stefan Richter872e3302010-07-29 18:19:22 +02002952
2953 switch (type) {
2954 case FW_ISO_CONTEXT_TRANSMIT:
2955 mask = &ohci->it_context_mask;
2956 callback = handle_it_packet;
2957 index = ffs(*mask) - 1;
2958 if (index >= 0) {
2959 *mask &= ~(1 << index);
2960 regs = OHCI1394_IsoXmitContextBase(index);
2961 ctx = &ohci->it_context_list[index];
2962 }
2963 break;
2964
2965 case FW_ISO_CONTEXT_RECEIVE:
2966 channels = &ohci->ir_context_channels;
2967 mask = &ohci->ir_context_mask;
2968 callback = handle_ir_packet_per_buffer;
2969 index = *channels & 1ULL << channel ? ffs(*mask) - 1 : -1;
2970 if (index >= 0) {
2971 *channels &= ~(1ULL << channel);
2972 *mask &= ~(1 << index);
2973 regs = OHCI1394_IsoRcvContextBase(index);
2974 ctx = &ohci->ir_context_list[index];
2975 }
2976 break;
2977
2978 case FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL:
2979 mask = &ohci->ir_context_mask;
2980 callback = handle_ir_buffer_fill;
2981 index = !ohci->mc_allocated ? ffs(*mask) - 1 : -1;
2982 if (index >= 0) {
2983 ohci->mc_allocated = true;
2984 *mask &= ~(1 << index);
2985 regs = OHCI1394_IsoRcvContextBase(index);
2986 ctx = &ohci->ir_context_list[index];
2987 }
2988 break;
2989
2990 default:
2991 index = -1;
2992 ret = -ENOSYS;
Stefan Richter4817ed22008-12-21 16:39:46 +01002993 }
Stefan Richter872e3302010-07-29 18:19:22 +02002994
Stefan Richter8a8c4732012-04-09 21:40:33 +02002995 spin_unlock_irq(&ohci->lock);
Kristian Høgsberged568912006-12-19 19:58:35 -05002996
2997 if (index < 0)
Stefan Richter872e3302010-07-29 18:19:22 +02002998 return ERR_PTR(ret);
Kristian Høgsberged568912006-12-19 19:58:35 -05002999
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -04003000 memset(ctx, 0, sizeof(*ctx));
Kristian Høgsberg9b32d5f2007-02-16 17:34:44 -05003001 ctx->header_length = 0;
3002 ctx->header = (void *) __get_free_page(GFP_KERNEL);
Stefan Richter872e3302010-07-29 18:19:22 +02003003 if (ctx->header == NULL) {
3004 ret = -ENOMEM;
Kristian Høgsberg9b32d5f2007-02-16 17:34:44 -05003005 goto out;
Stefan Richter872e3302010-07-29 18:19:22 +02003006 }
Stefan Richter2dbd7d72008-12-14 21:45:45 +01003007 ret = context_init(&ctx->context, ohci, regs, callback);
3008 if (ret < 0)
Kristian Høgsberg9b32d5f2007-02-16 17:34:44 -05003009 goto out_with_header;
Kristian Høgsberged568912006-12-19 19:58:35 -05003010
Clemens Ladischd1bbd202012-03-18 19:06:39 +01003011 if (type == FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL) {
Stefan Richter872e3302010-07-29 18:19:22 +02003012 set_multichannel_mask(ohci, 0);
Clemens Ladischd1bbd202012-03-18 19:06:39 +01003013 ctx->mc_completed = 0;
3014 }
Stefan Richter872e3302010-07-29 18:19:22 +02003015
Kristian Høgsberged568912006-12-19 19:58:35 -05003016 return &ctx->base;
Kristian Høgsberg9b32d5f2007-02-16 17:34:44 -05003017
3018 out_with_header:
3019 free_page((unsigned long)ctx->header);
3020 out:
Stefan Richter8a8c4732012-04-09 21:40:33 +02003021 spin_lock_irq(&ohci->lock);
Stefan Richter872e3302010-07-29 18:19:22 +02003022
3023 switch (type) {
3024 case FW_ISO_CONTEXT_RECEIVE:
3025 *channels |= 1ULL << channel;
3026 break;
3027
3028 case FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL:
3029 ohci->mc_allocated = false;
3030 break;
3031 }
Kristian Høgsberg9b32d5f2007-02-16 17:34:44 -05003032 *mask |= 1 << index;
Stefan Richter872e3302010-07-29 18:19:22 +02003033
Stefan Richter8a8c4732012-04-09 21:40:33 +02003034 spin_unlock_irq(&ohci->lock);
Kristian Høgsberg9b32d5f2007-02-16 17:34:44 -05003035
Stefan Richter2dbd7d72008-12-14 21:45:45 +01003036 return ERR_PTR(ret);
Kristian Høgsberged568912006-12-19 19:58:35 -05003037}
3038
Kristian Høgsbergeb0306e2007-03-14 17:34:54 -04003039static int ohci_start_iso(struct fw_iso_context *base,
3040 s32 cycle, u32 sync, u32 tags)
Kristian Høgsberged568912006-12-19 19:58:35 -05003041{
Stefan Richter373b2ed2007-03-04 14:45:18 +01003042 struct iso_context *ctx = container_of(base, struct iso_context, base);
Kristian Høgsberg30200732007-02-16 17:34:39 -05003043 struct fw_ohci *ohci = ctx->context.ohci;
Stefan Richter872e3302010-07-29 18:19:22 +02003044 u32 control = IR_CONTEXT_ISOCH_HEADER, match;
Kristian Høgsberged568912006-12-19 19:58:35 -05003045 int index;
3046
Clemens Ladisch44b74d92011-02-23 09:27:40 +01003047 /* the controller cannot start without any queued packets */
3048 if (ctx->context.last->branch_address == 0)
3049 return -ENODATA;
3050
Stefan Richter872e3302010-07-29 18:19:22 +02003051 switch (ctx->base.type) {
3052 case FW_ISO_CONTEXT_TRANSMIT:
Kristian Høgsberg295e3fe2007-02-16 17:34:40 -05003053 index = ctx - ohci->it_context_list;
Kristian Høgsberg8a2f7d92007-03-28 14:26:10 -04003054 match = 0;
3055 if (cycle >= 0)
3056 match = IT_CONTEXT_CYCLE_MATCH_ENABLE |
Kristian Høgsberg295e3fe2007-02-16 17:34:40 -05003057 (cycle & 0x7fff) << 16;
Kristian Høgsberg21efb3c2007-02-16 17:34:50 -05003058
Kristian Høgsberg295e3fe2007-02-16 17:34:40 -05003059 reg_write(ohci, OHCI1394_IsoXmitIntEventClear, 1 << index);
3060 reg_write(ohci, OHCI1394_IsoXmitIntMaskSet, 1 << index);
Kristian Høgsberg8a2f7d92007-03-28 14:26:10 -04003061 context_run(&ctx->context, match);
Stefan Richter872e3302010-07-29 18:19:22 +02003062 break;
3063
3064 case FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL:
3065 control |= IR_CONTEXT_BUFFER_FILL|IR_CONTEXT_MULTI_CHANNEL_MODE;
3066 /* fall through */
3067 case FW_ISO_CONTEXT_RECEIVE:
Kristian Høgsberg295e3fe2007-02-16 17:34:40 -05003068 index = ctx - ohci->ir_context_list;
Kristian Høgsberg8a2f7d92007-03-28 14:26:10 -04003069 match = (tags << 28) | (sync << 8) | ctx->base.channel;
3070 if (cycle >= 0) {
3071 match |= (cycle & 0x07fff) << 12;
3072 control |= IR_CONTEXT_CYCLE_MATCH_ENABLE;
3073 }
Kristian Høgsberged568912006-12-19 19:58:35 -05003074
Kristian Høgsberg295e3fe2007-02-16 17:34:40 -05003075 reg_write(ohci, OHCI1394_IsoRecvIntEventClear, 1 << index);
3076 reg_write(ohci, OHCI1394_IsoRecvIntMaskSet, 1 << index);
Kristian Høgsberga77754a2007-05-07 20:33:35 -04003077 reg_write(ohci, CONTEXT_MATCH(ctx->context.regs), match);
Kristian Høgsberg8a2f7d92007-03-28 14:26:10 -04003078 context_run(&ctx->context, control);
Maxim Levitskydd237362010-11-29 04:09:50 +02003079
3080 ctx->sync = sync;
3081 ctx->tags = tags;
3082
Stefan Richter872e3302010-07-29 18:19:22 +02003083 break;
Kristian Høgsberg295e3fe2007-02-16 17:34:40 -05003084 }
Kristian Høgsberged568912006-12-19 19:58:35 -05003085
3086 return 0;
3087}
3088
Kristian Høgsbergb8295662007-02-16 17:34:42 -05003089static int ohci_stop_iso(struct fw_iso_context *base)
3090{
3091 struct fw_ohci *ohci = fw_ohci(base->card);
Stefan Richter373b2ed2007-03-04 14:45:18 +01003092 struct iso_context *ctx = container_of(base, struct iso_context, base);
Kristian Høgsbergb8295662007-02-16 17:34:42 -05003093 int index;
3094
Stefan Richter872e3302010-07-29 18:19:22 +02003095 switch (ctx->base.type) {
3096 case FW_ISO_CONTEXT_TRANSMIT:
Kristian Høgsbergb8295662007-02-16 17:34:42 -05003097 index = ctx - ohci->it_context_list;
3098 reg_write(ohci, OHCI1394_IsoXmitIntMaskClear, 1 << index);
Stefan Richter872e3302010-07-29 18:19:22 +02003099 break;
3100
3101 case FW_ISO_CONTEXT_RECEIVE:
3102 case FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL:
Kristian Høgsbergb8295662007-02-16 17:34:42 -05003103 index = ctx - ohci->ir_context_list;
3104 reg_write(ohci, OHCI1394_IsoRecvIntMaskClear, 1 << index);
Stefan Richter872e3302010-07-29 18:19:22 +02003105 break;
Kristian Høgsbergb8295662007-02-16 17:34:42 -05003106 }
3107 flush_writes(ohci);
3108 context_stop(&ctx->context);
Clemens Ladische81cbeb2011-02-16 10:32:11 +01003109 tasklet_kill(&ctx->context.tasklet);
Kristian Høgsbergb8295662007-02-16 17:34:42 -05003110
3111 return 0;
3112}
3113
Kristian Høgsberged568912006-12-19 19:58:35 -05003114static void ohci_free_iso_context(struct fw_iso_context *base)
3115{
3116 struct fw_ohci *ohci = fw_ohci(base->card);
Stefan Richter373b2ed2007-03-04 14:45:18 +01003117 struct iso_context *ctx = container_of(base, struct iso_context, base);
Kristian Høgsberged568912006-12-19 19:58:35 -05003118 unsigned long flags;
3119 int index;
3120
Kristian Høgsbergb8295662007-02-16 17:34:42 -05003121 ohci_stop_iso(base);
3122 context_release(&ctx->context);
Kristian Høgsberg9b32d5f2007-02-16 17:34:44 -05003123 free_page((unsigned long)ctx->header);
Kristian Høgsbergb8295662007-02-16 17:34:42 -05003124
Kristian Høgsberged568912006-12-19 19:58:35 -05003125 spin_lock_irqsave(&ohci->lock, flags);
3126
Stefan Richter872e3302010-07-29 18:19:22 +02003127 switch (base->type) {
3128 case FW_ISO_CONTEXT_TRANSMIT:
Kristian Høgsberged568912006-12-19 19:58:35 -05003129 index = ctx - ohci->it_context_list;
Kristian Høgsberged568912006-12-19 19:58:35 -05003130 ohci->it_context_mask |= 1 << index;
Stefan Richter872e3302010-07-29 18:19:22 +02003131 break;
3132
3133 case FW_ISO_CONTEXT_RECEIVE:
Kristian Høgsberged568912006-12-19 19:58:35 -05003134 index = ctx - ohci->ir_context_list;
Kristian Høgsberged568912006-12-19 19:58:35 -05003135 ohci->ir_context_mask |= 1 << index;
Stefan Richter4817ed22008-12-21 16:39:46 +01003136 ohci->ir_context_channels |= 1ULL << base->channel;
Stefan Richter872e3302010-07-29 18:19:22 +02003137 break;
3138
3139 case FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL:
3140 index = ctx - ohci->ir_context_list;
3141 ohci->ir_context_mask |= 1 << index;
3142 ohci->ir_context_channels |= ohci->mc_channels;
3143 ohci->mc_channels = 0;
3144 ohci->mc_allocated = false;
3145 break;
Kristian Høgsberged568912006-12-19 19:58:35 -05003146 }
Kristian Høgsberged568912006-12-19 19:58:35 -05003147
3148 spin_unlock_irqrestore(&ohci->lock, flags);
3149}
3150
Stefan Richter872e3302010-07-29 18:19:22 +02003151static int ohci_set_iso_channels(struct fw_iso_context *base, u64 *channels)
Kristian Høgsberged568912006-12-19 19:58:35 -05003152{
Stefan Richter872e3302010-07-29 18:19:22 +02003153 struct fw_ohci *ohci = fw_ohci(base->card);
3154 unsigned long flags;
3155 int ret;
3156
3157 switch (base->type) {
3158 case FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL:
3159
3160 spin_lock_irqsave(&ohci->lock, flags);
3161
3162 /* Don't allow multichannel to grab other contexts' channels. */
3163 if (~ohci->ir_context_channels & ~ohci->mc_channels & *channels) {
3164 *channels = ohci->ir_context_channels;
3165 ret = -EBUSY;
3166 } else {
3167 set_multichannel_mask(ohci, *channels);
3168 ret = 0;
3169 }
3170
3171 spin_unlock_irqrestore(&ohci->lock, flags);
3172
3173 break;
3174 default:
3175 ret = -EINVAL;
3176 }
3177
3178 return ret;
3179}
3180
Maxim Levitskydd237362010-11-29 04:09:50 +02003181#ifdef CONFIG_PM
3182static void ohci_resume_iso_dma(struct fw_ohci *ohci)
3183{
3184 int i;
3185 struct iso_context *ctx;
3186
3187 for (i = 0 ; i < ohci->n_ir ; i++) {
3188 ctx = &ohci->ir_context_list[i];
Stefan Richter693a50b2011-01-01 15:17:05 +01003189 if (ctx->context.running)
Maxim Levitskydd237362010-11-29 04:09:50 +02003190 ohci_start_iso(&ctx->base, 0, ctx->sync, ctx->tags);
3191 }
3192
3193 for (i = 0 ; i < ohci->n_it ; i++) {
3194 ctx = &ohci->it_context_list[i];
Stefan Richter693a50b2011-01-01 15:17:05 +01003195 if (ctx->context.running)
Maxim Levitskydd237362010-11-29 04:09:50 +02003196 ohci_start_iso(&ctx->base, 0, ctx->sync, ctx->tags);
3197 }
3198}
3199#endif
3200
Stefan Richter872e3302010-07-29 18:19:22 +02003201static int queue_iso_transmit(struct iso_context *ctx,
3202 struct fw_iso_packet *packet,
3203 struct fw_iso_buffer *buffer,
3204 unsigned long payload)
3205{
Kristian Høgsberg30200732007-02-16 17:34:39 -05003206 struct descriptor *d, *last, *pd;
Kristian Høgsberged568912006-12-19 19:58:35 -05003207 struct fw_iso_packet *p;
3208 __le32 *header;
Kristian Høgsberg9aad8122007-02-16 17:34:38 -05003209 dma_addr_t d_bus, page_bus;
Kristian Høgsberged568912006-12-19 19:58:35 -05003210 u32 z, header_z, payload_z, irq;
3211 u32 payload_index, payload_end_index, next_page_index;
Kristian Høgsberg30200732007-02-16 17:34:39 -05003212 int page, end_page, i, length, offset;
Kristian Høgsberged568912006-12-19 19:58:35 -05003213
Kristian Høgsberged568912006-12-19 19:58:35 -05003214 p = packet;
Kristian Høgsberg9aad8122007-02-16 17:34:38 -05003215 payload_index = payload;
Kristian Høgsberged568912006-12-19 19:58:35 -05003216
3217 if (p->skip)
3218 z = 1;
3219 else
3220 z = 2;
3221 if (p->header_length > 0)
3222 z++;
3223
3224 /* Determine the first page the payload isn't contained in. */
3225 end_page = PAGE_ALIGN(payload_index + p->payload_length) >> PAGE_SHIFT;
3226 if (p->payload_length > 0)
3227 payload_z = end_page - (payload_index >> PAGE_SHIFT);
3228 else
3229 payload_z = 0;
3230
3231 z += payload_z;
3232
3233 /* Get header size in number of descriptors. */
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -04003234 header_z = DIV_ROUND_UP(p->header_length, sizeof(*d));
Kristian Høgsberged568912006-12-19 19:58:35 -05003235
Kristian Høgsberg30200732007-02-16 17:34:39 -05003236 d = context_get_descriptors(&ctx->context, z + header_z, &d_bus);
3237 if (d == NULL)
3238 return -ENOMEM;
Kristian Høgsberged568912006-12-19 19:58:35 -05003239
3240 if (!p->skip) {
Kristian Høgsberga77754a2007-05-07 20:33:35 -04003241 d[0].control = cpu_to_le16(DESCRIPTOR_KEY_IMMEDIATE);
Kristian Høgsberged568912006-12-19 19:58:35 -05003242 d[0].req_count = cpu_to_le16(8);
Clemens Ladisch7f51a102010-02-08 08:30:03 +01003243 /*
3244 * Link the skip address to this descriptor itself. This causes
3245 * a context to skip a cycle whenever lost cycles or FIFO
3246 * overruns occur, without dropping the data. The application
3247 * should then decide whether this is an error condition or not.
3248 * FIXME: Make the context's cycle-lost behaviour configurable?
3249 */
3250 d[0].branch_address = cpu_to_le32(d_bus | z);
Kristian Høgsberged568912006-12-19 19:58:35 -05003251
3252 header = (__le32 *) &d[1];
Kristian Høgsberga77754a2007-05-07 20:33:35 -04003253 header[0] = cpu_to_le32(IT_HEADER_SY(p->sy) |
3254 IT_HEADER_TAG(p->tag) |
3255 IT_HEADER_TCODE(TCODE_STREAM_DATA) |
3256 IT_HEADER_CHANNEL(ctx->base.channel) |
3257 IT_HEADER_SPEED(ctx->base.speed));
Kristian Høgsberged568912006-12-19 19:58:35 -05003258 header[1] =
Kristian Høgsberga77754a2007-05-07 20:33:35 -04003259 cpu_to_le32(IT_HEADER_DATA_LENGTH(p->header_length +
Kristian Høgsberged568912006-12-19 19:58:35 -05003260 p->payload_length));
3261 }
3262
3263 if (p->header_length > 0) {
3264 d[2].req_count = cpu_to_le16(p->header_length);
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -04003265 d[2].data_address = cpu_to_le32(d_bus + z * sizeof(*d));
Kristian Høgsberged568912006-12-19 19:58:35 -05003266 memcpy(&d[z], p->header, p->header_length);
3267 }
3268
3269 pd = d + z - payload_z;
3270 payload_end_index = payload_index + p->payload_length;
3271 for (i = 0; i < payload_z; i++) {
3272 page = payload_index >> PAGE_SHIFT;
3273 offset = payload_index & ~PAGE_MASK;
3274 next_page_index = (page + 1) << PAGE_SHIFT;
3275 length =
3276 min(next_page_index, payload_end_index) - payload_index;
3277 pd[i].req_count = cpu_to_le16(length);
Kristian Høgsberg9aad8122007-02-16 17:34:38 -05003278
3279 page_bus = page_private(buffer->pages[page]);
3280 pd[i].data_address = cpu_to_le32(page_bus + offset);
Kristian Høgsberged568912006-12-19 19:58:35 -05003281
Clemens Ladischa572e682011-10-15 23:12:23 +02003282 dma_sync_single_range_for_device(ctx->context.ohci->card.device,
3283 page_bus, offset, length,
3284 DMA_TO_DEVICE);
3285
Kristian Høgsberged568912006-12-19 19:58:35 -05003286 payload_index += length;
3287 }
3288
Kristian Høgsberged568912006-12-19 19:58:35 -05003289 if (p->interrupt)
Kristian Høgsberga77754a2007-05-07 20:33:35 -04003290 irq = DESCRIPTOR_IRQ_ALWAYS;
Kristian Høgsberged568912006-12-19 19:58:35 -05003291 else
Kristian Høgsberga77754a2007-05-07 20:33:35 -04003292 irq = DESCRIPTOR_NO_IRQ;
Kristian Høgsberged568912006-12-19 19:58:35 -05003293
Kristian Høgsberg30200732007-02-16 17:34:39 -05003294 last = z == 2 ? d : d + z - 1;
Kristian Høgsberga77754a2007-05-07 20:33:35 -04003295 last->control |= cpu_to_le16(DESCRIPTOR_OUTPUT_LAST |
3296 DESCRIPTOR_STATUS |
3297 DESCRIPTOR_BRANCH_ALWAYS |
Kristian Høgsbergcbb59da2007-02-16 17:34:35 -05003298 irq);
Kristian Høgsberged568912006-12-19 19:58:35 -05003299
Kristian Høgsberg30200732007-02-16 17:34:39 -05003300 context_append(&ctx->context, d, z, header_z);
Kristian Høgsberged568912006-12-19 19:58:35 -05003301
3302 return 0;
3303}
Stefan Richter373b2ed2007-03-04 14:45:18 +01003304
Stefan Richter872e3302010-07-29 18:19:22 +02003305static int queue_iso_packet_per_buffer(struct iso_context *ctx,
3306 struct fw_iso_packet *packet,
3307 struct fw_iso_buffer *buffer,
3308 unsigned long payload)
Jarod Wilsona186b4a2007-12-03 13:43:12 -05003309{
Clemens Ladischa572e682011-10-15 23:12:23 +02003310 struct device *device = ctx->context.ohci->card.device;
Jay Fenlason8c0c0cc2009-12-11 14:23:58 -05003311 struct descriptor *d, *pd;
Jarod Wilsona186b4a2007-12-03 13:43:12 -05003312 dma_addr_t d_bus, page_bus;
3313 u32 z, header_z, rest;
David Moorebcee8932007-12-19 15:26:38 -05003314 int i, j, length;
3315 int page, offset, packet_count, header_size, payload_per_buffer;
Jarod Wilsona186b4a2007-12-03 13:43:12 -05003316
3317 /*
David Moore1aa292b2008-07-22 23:23:40 -07003318 * The OHCI controller puts the isochronous header and trailer in the
3319 * buffer, so we need at least 8 bytes.
Jarod Wilsona186b4a2007-12-03 13:43:12 -05003320 */
Stefan Richter872e3302010-07-29 18:19:22 +02003321 packet_count = packet->header_length / ctx->base.header_size;
David Moore1aa292b2008-07-22 23:23:40 -07003322 header_size = max(ctx->base.header_size, (size_t)8);
Jarod Wilsona186b4a2007-12-03 13:43:12 -05003323
3324 /* Get header size in number of descriptors. */
3325 header_z = DIV_ROUND_UP(header_size, sizeof(*d));
3326 page = payload >> PAGE_SHIFT;
3327 offset = payload & ~PAGE_MASK;
Stefan Richter872e3302010-07-29 18:19:22 +02003328 payload_per_buffer = packet->payload_length / packet_count;
Jarod Wilsona186b4a2007-12-03 13:43:12 -05003329
3330 for (i = 0; i < packet_count; i++) {
3331 /* d points to the header descriptor */
David Moorebcee8932007-12-19 15:26:38 -05003332 z = DIV_ROUND_UP(payload_per_buffer + offset, PAGE_SIZE) + 1;
Jarod Wilsona186b4a2007-12-03 13:43:12 -05003333 d = context_get_descriptors(&ctx->context,
David Moorebcee8932007-12-19 15:26:38 -05003334 z + header_z, &d_bus);
Jarod Wilsona186b4a2007-12-03 13:43:12 -05003335 if (d == NULL)
3336 return -ENOMEM;
3337
David Moorebcee8932007-12-19 15:26:38 -05003338 d->control = cpu_to_le16(DESCRIPTOR_STATUS |
3339 DESCRIPTOR_INPUT_MORE);
Stefan Richter872e3302010-07-29 18:19:22 +02003340 if (packet->skip && i == 0)
David Moorebcee8932007-12-19 15:26:38 -05003341 d->control |= cpu_to_le16(DESCRIPTOR_WAIT);
Jarod Wilsona186b4a2007-12-03 13:43:12 -05003342 d->req_count = cpu_to_le16(header_size);
3343 d->res_count = d->req_count;
David Moorebcee8932007-12-19 15:26:38 -05003344 d->transfer_status = 0;
Jarod Wilsona186b4a2007-12-03 13:43:12 -05003345 d->data_address = cpu_to_le32(d_bus + (z * sizeof(*d)));
3346
David Moorebcee8932007-12-19 15:26:38 -05003347 rest = payload_per_buffer;
Jay Fenlason8c0c0cc2009-12-11 14:23:58 -05003348 pd = d;
David Moorebcee8932007-12-19 15:26:38 -05003349 for (j = 1; j < z; j++) {
Jay Fenlason8c0c0cc2009-12-11 14:23:58 -05003350 pd++;
David Moorebcee8932007-12-19 15:26:38 -05003351 pd->control = cpu_to_le16(DESCRIPTOR_STATUS |
3352 DESCRIPTOR_INPUT_MORE);
3353
3354 if (offset + rest < PAGE_SIZE)
3355 length = rest;
3356 else
3357 length = PAGE_SIZE - offset;
3358 pd->req_count = cpu_to_le16(length);
3359 pd->res_count = pd->req_count;
3360 pd->transfer_status = 0;
3361
3362 page_bus = page_private(buffer->pages[page]);
3363 pd->data_address = cpu_to_le32(page_bus + offset);
3364
Clemens Ladischa572e682011-10-15 23:12:23 +02003365 dma_sync_single_range_for_device(device, page_bus,
3366 offset, length,
3367 DMA_FROM_DEVICE);
3368
David Moorebcee8932007-12-19 15:26:38 -05003369 offset = (offset + length) & ~PAGE_MASK;
3370 rest -= length;
3371 if (offset == 0)
3372 page++;
3373 }
Jarod Wilsona186b4a2007-12-03 13:43:12 -05003374 pd->control = cpu_to_le16(DESCRIPTOR_STATUS |
3375 DESCRIPTOR_INPUT_LAST |
3376 DESCRIPTOR_BRANCH_ALWAYS);
Stefan Richter872e3302010-07-29 18:19:22 +02003377 if (packet->interrupt && i == packet_count - 1)
Jarod Wilsona186b4a2007-12-03 13:43:12 -05003378 pd->control |= cpu_to_le16(DESCRIPTOR_IRQ_ALWAYS);
3379
Jarod Wilsona186b4a2007-12-03 13:43:12 -05003380 context_append(&ctx->context, d, z, header_z);
3381 }
3382
3383 return 0;
3384}
3385
Stefan Richter872e3302010-07-29 18:19:22 +02003386static int queue_iso_buffer_fill(struct iso_context *ctx,
3387 struct fw_iso_packet *packet,
3388 struct fw_iso_buffer *buffer,
3389 unsigned long payload)
3390{
3391 struct descriptor *d;
3392 dma_addr_t d_bus, page_bus;
3393 int page, offset, rest, z, i, length;
3394
3395 page = payload >> PAGE_SHIFT;
3396 offset = payload & ~PAGE_MASK;
3397 rest = packet->payload_length;
3398
3399 /* We need one descriptor for each page in the buffer. */
3400 z = DIV_ROUND_UP(offset + rest, PAGE_SIZE);
3401
3402 if (WARN_ON(offset & 3 || rest & 3 || page + z > buffer->page_count))
3403 return -EFAULT;
3404
3405 for (i = 0; i < z; i++) {
3406 d = context_get_descriptors(&ctx->context, 1, &d_bus);
3407 if (d == NULL)
3408 return -ENOMEM;
3409
3410 d->control = cpu_to_le16(DESCRIPTOR_INPUT_MORE |
3411 DESCRIPTOR_BRANCH_ALWAYS);
3412 if (packet->skip && i == 0)
3413 d->control |= cpu_to_le16(DESCRIPTOR_WAIT);
3414 if (packet->interrupt && i == z - 1)
3415 d->control |= cpu_to_le16(DESCRIPTOR_IRQ_ALWAYS);
3416
3417 if (offset + rest < PAGE_SIZE)
3418 length = rest;
3419 else
3420 length = PAGE_SIZE - offset;
3421 d->req_count = cpu_to_le16(length);
3422 d->res_count = d->req_count;
3423 d->transfer_status = 0;
3424
3425 page_bus = page_private(buffer->pages[page]);
3426 d->data_address = cpu_to_le32(page_bus + offset);
3427
Clemens Ladischa572e682011-10-15 23:12:23 +02003428 dma_sync_single_range_for_device(ctx->context.ohci->card.device,
3429 page_bus, offset, length,
3430 DMA_FROM_DEVICE);
3431
Stefan Richter872e3302010-07-29 18:19:22 +02003432 rest -= length;
3433 offset = 0;
3434 page++;
3435
3436 context_append(&ctx->context, d, 1, 0);
3437 }
3438
3439 return 0;
3440}
3441
Stefan Richter53dca512008-12-14 21:47:04 +01003442static int ohci_queue_iso(struct fw_iso_context *base,
3443 struct fw_iso_packet *packet,
3444 struct fw_iso_buffer *buffer,
3445 unsigned long payload)
Kristian Høgsberg295e3fe2007-02-16 17:34:40 -05003446{
Kristian Høgsberge364cf42007-02-16 17:34:49 -05003447 struct iso_context *ctx = container_of(base, struct iso_context, base);
David Moorefe5ca632008-01-06 17:21:41 -05003448 unsigned long flags;
Stefan Richter872e3302010-07-29 18:19:22 +02003449 int ret = -ENOSYS;
Kristian Høgsberge364cf42007-02-16 17:34:49 -05003450
David Moorefe5ca632008-01-06 17:21:41 -05003451 spin_lock_irqsave(&ctx->context.ohci->lock, flags);
Stefan Richter872e3302010-07-29 18:19:22 +02003452 switch (base->type) {
3453 case FW_ISO_CONTEXT_TRANSMIT:
3454 ret = queue_iso_transmit(ctx, packet, buffer, payload);
3455 break;
3456 case FW_ISO_CONTEXT_RECEIVE:
3457 ret = queue_iso_packet_per_buffer(ctx, packet, buffer, payload);
3458 break;
3459 case FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL:
3460 ret = queue_iso_buffer_fill(ctx, packet, buffer, payload);
3461 break;
3462 }
David Moorefe5ca632008-01-06 17:21:41 -05003463 spin_unlock_irqrestore(&ctx->context.ohci->lock, flags);
3464
Stefan Richter2dbd7d72008-12-14 21:45:45 +01003465 return ret;
Kristian Høgsberg295e3fe2007-02-16 17:34:40 -05003466}
3467
Clemens Ladisch13882a82011-05-02 09:33:56 +02003468static void ohci_flush_queue_iso(struct fw_iso_context *base)
3469{
3470 struct context *ctx =
3471 &container_of(base, struct iso_context, base)->context;
3472
3473 reg_write(ctx->ohci, CONTROL_SET(ctx->regs), CONTEXT_WAKE);
Clemens Ladisch13882a82011-05-02 09:33:56 +02003474}
3475
Clemens Ladischd1bbd202012-03-18 19:06:39 +01003476static int ohci_flush_iso_completions(struct fw_iso_context *base)
3477{
3478 struct iso_context *ctx = container_of(base, struct iso_context, base);
3479 int ret = 0;
3480
3481 tasklet_disable(&ctx->context.tasklet);
3482
3483 if (!test_and_set_bit_lock(0, &ctx->flushing_completions)) {
3484 context_tasklet((unsigned long)&ctx->context);
3485
3486 switch (base->type) {
3487 case FW_ISO_CONTEXT_TRANSMIT:
3488 case FW_ISO_CONTEXT_RECEIVE:
3489 if (ctx->header_length != 0)
3490 flush_iso_completions(ctx);
3491 break;
3492 case FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL:
3493 if (ctx->mc_completed != 0)
3494 flush_ir_buffer_fill(ctx);
3495 break;
3496 default:
3497 ret = -ENOSYS;
3498 }
3499
3500 clear_bit_unlock(0, &ctx->flushing_completions);
3501 smp_mb__after_clear_bit();
3502 }
3503
3504 tasklet_enable(&ctx->context.tasklet);
3505
3506 return ret;
3507}
3508
Stefan Richter21ebcd12007-01-14 15:29:07 +01003509static const struct fw_card_driver ohci_driver = {
Kristian Høgsberged568912006-12-19 19:58:35 -05003510 .enable = ohci_enable,
Stefan Richter02d37be2010-07-08 16:09:06 +02003511 .read_phy_reg = ohci_read_phy_reg,
Kristian Høgsberged568912006-12-19 19:58:35 -05003512 .update_phy_reg = ohci_update_phy_reg,
3513 .set_config_rom = ohci_set_config_rom,
3514 .send_request = ohci_send_request,
3515 .send_response = ohci_send_response,
Kristian Høgsberg730c32f2007-02-06 14:49:32 -05003516 .cancel_packet = ohci_cancel_packet,
Kristian Høgsberged568912006-12-19 19:58:35 -05003517 .enable_phys_dma = ohci_enable_phys_dma,
Stefan Richter0fcff4e2010-06-12 20:35:52 +02003518 .read_csr = ohci_read_csr,
3519 .write_csr = ohci_write_csr,
Kristian Høgsberged568912006-12-19 19:58:35 -05003520
3521 .allocate_iso_context = ohci_allocate_iso_context,
3522 .free_iso_context = ohci_free_iso_context,
Stefan Richter872e3302010-07-29 18:19:22 +02003523 .set_iso_channels = ohci_set_iso_channels,
Kristian Høgsberged568912006-12-19 19:58:35 -05003524 .queue_iso = ohci_queue_iso,
Clemens Ladisch13882a82011-05-02 09:33:56 +02003525 .flush_queue_iso = ohci_flush_queue_iso,
Clemens Ladischd1bbd202012-03-18 19:06:39 +01003526 .flush_iso_completions = ohci_flush_iso_completions,
Kristian Høgsberg69cdb722007-02-16 17:34:41 -05003527 .start_iso = ohci_start_iso,
Kristian Høgsbergb8295662007-02-16 17:34:42 -05003528 .stop_iso = ohci_stop_iso,
Kristian Høgsberged568912006-12-19 19:58:35 -05003529};
3530
Stefan Richter2ed0f182008-03-01 12:35:29 +01003531#ifdef CONFIG_PPC_PMAC
Stefan Richter5da3dac2010-04-02 14:05:02 +02003532static void pmac_ohci_on(struct pci_dev *dev)
Stefan Richter2ed0f182008-03-01 12:35:29 +01003533{
3534 if (machine_is(powermac)) {
3535 struct device_node *ofn = pci_device_to_OF_node(dev);
3536
3537 if (ofn) {
3538 pmac_call_feature(PMAC_FTR_1394_CABLE_POWER, ofn, 0, 1);
3539 pmac_call_feature(PMAC_FTR_1394_ENABLE, ofn, 0, 1);
3540 }
3541 }
3542}
3543
Stefan Richter5da3dac2010-04-02 14:05:02 +02003544static void pmac_ohci_off(struct pci_dev *dev)
Stefan Richter2ed0f182008-03-01 12:35:29 +01003545{
3546 if (machine_is(powermac)) {
3547 struct device_node *ofn = pci_device_to_OF_node(dev);
3548
3549 if (ofn) {
3550 pmac_call_feature(PMAC_FTR_1394_ENABLE, ofn, 0, 0);
3551 pmac_call_feature(PMAC_FTR_1394_CABLE_POWER, ofn, 0, 0);
3552 }
3553 }
3554}
3555#else
Stefan Richter5da3dac2010-04-02 14:05:02 +02003556static inline void pmac_ohci_on(struct pci_dev *dev) {}
3557static inline void pmac_ohci_off(struct pci_dev *dev) {}
Stefan Richter2ed0f182008-03-01 12:35:29 +01003558#endif /* CONFIG_PPC_PMAC */
3559
Bill Pemberton03f94c02012-11-19 13:22:57 -05003560static int pci_probe(struct pci_dev *dev,
Stefan Richter53dca512008-12-14 21:47:04 +01003561 const struct pci_device_id *ent)
Kristian Høgsberged568912006-12-19 19:58:35 -05003562{
3563 struct fw_ohci *ohci;
Stefan Richteraa0170f2010-10-17 14:09:12 +02003564 u32 bus_options, max_receive, link_speed, version;
Kristian Høgsberged568912006-12-19 19:58:35 -05003565 u64 guid;
Maxim Levitskydd237362010-11-29 04:09:50 +02003566 int i, err;
Kristian Høgsberged568912006-12-19 19:58:35 -05003567 size_t size;
3568
Stefan Richter7f7e37112011-07-10 00:23:03 +02003569 if (dev->vendor == PCI_VENDOR_ID_PINNACLE_SYSTEMS) {
3570 dev_err(&dev->dev, "Pinnacle MovieBoard is not yet supported\n");
3571 return -ENOSYS;
3572 }
3573
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -04003574 ohci = kzalloc(sizeof(*ohci), GFP_KERNEL);
Kristian Høgsberged568912006-12-19 19:58:35 -05003575 if (ohci == NULL) {
Stefan Richter7007a072008-10-26 09:50:31 +01003576 err = -ENOMEM;
3577 goto fail;
Kristian Høgsberged568912006-12-19 19:58:35 -05003578 }
3579
3580 fw_card_initialize(&ohci->card, &ohci_driver, &dev->dev);
3581
Stefan Richter5da3dac2010-04-02 14:05:02 +02003582 pmac_ohci_on(dev);
Stefan Richter130d5492008-03-24 20:55:28 +01003583
Kristian Høgsbergd79406d2007-05-09 19:23:15 -04003584 err = pci_enable_device(dev);
3585 if (err) {
Stefan Richter64d21722011-12-20 21:32:46 +01003586 dev_err(&dev->dev, "failed to enable OHCI hardware\n");
Stefan Richterbd7dee62008-02-24 18:59:55 +01003587 goto fail_free;
Kristian Høgsberged568912006-12-19 19:58:35 -05003588 }
3589
3590 pci_set_master(dev);
3591 pci_write_config_dword(dev, OHCI1394_PCI_HCI_Control, 0);
3592 pci_set_drvdata(dev, ohci);
3593
3594 spin_lock_init(&ohci->lock);
Stefan Richter02d37be2010-07-08 16:09:06 +02003595 mutex_init(&ohci->phy_reg_mutex);
Kristian Høgsberged568912006-12-19 19:58:35 -05003596
Stephan Gatzka2d7a36e2011-07-25 22:16:24 +02003597 INIT_WORK(&ohci->bus_reset_work, bus_reset_work);
Kristian Høgsberged568912006-12-19 19:58:35 -05003598
Clemens Ladisch7baab9a2012-06-04 21:28:07 +02003599 if (!(pci_resource_flags(dev, 0) & IORESOURCE_MEM) ||
3600 pci_resource_len(dev, 0) < OHCI1394_REGISTER_SIZE) {
Peter Hurleyde97cb62013-03-26 11:54:06 -04003601 ohci_err(ohci, "invalid MMIO resource\n");
Clemens Ladisch7baab9a2012-06-04 21:28:07 +02003602 err = -ENXIO;
3603 goto fail_disable;
3604 }
3605
Kristian Høgsbergd79406d2007-05-09 19:23:15 -04003606 err = pci_request_region(dev, 0, ohci_driver_name);
3607 if (err) {
Peter Hurleyde97cb62013-03-26 11:54:06 -04003608 ohci_err(ohci, "MMIO resource unavailable\n");
Kristian Høgsbergd79406d2007-05-09 19:23:15 -04003609 goto fail_disable;
Kristian Høgsberged568912006-12-19 19:58:35 -05003610 }
3611
3612 ohci->registers = pci_iomap(dev, 0, OHCI1394_REGISTER_SIZE);
3613 if (ohci->registers == NULL) {
Peter Hurleyde97cb62013-03-26 11:54:06 -04003614 ohci_err(ohci, "failed to remap registers\n");
Kristian Høgsbergd79406d2007-05-09 19:23:15 -04003615 err = -ENXIO;
3616 goto fail_iomem;
Kristian Høgsberged568912006-12-19 19:58:35 -05003617 }
3618
Stefan Richter4a635592010-02-21 17:58:01 +01003619 for (i = 0; i < ARRAY_SIZE(ohci_quirks); i++)
Stefan Richter9993e0f2010-12-07 20:32:40 +01003620 if ((ohci_quirks[i].vendor == dev->vendor) &&
3621 (ohci_quirks[i].device == (unsigned short)PCI_ANY_ID ||
3622 ohci_quirks[i].device == dev->device) &&
3623 (ohci_quirks[i].revision == (unsigned short)PCI_ANY_ID ||
3624 ohci_quirks[i].revision >= dev->revision)) {
Stefan Richter4a635592010-02-21 17:58:01 +01003625 ohci->quirks = ohci_quirks[i].flags;
3626 break;
3627 }
Stefan Richter3e9cc2f2010-02-21 17:58:29 +01003628 if (param_quirks)
3629 ohci->quirks = param_quirks;
Clemens Ladischb6775322010-01-20 09:58:02 +01003630
Clemens Ladischec766a72010-11-30 08:25:17 +01003631 /*
3632 * Because dma_alloc_coherent() allocates at least one page,
3633 * we save space by using a common buffer for the AR request/
3634 * response descriptors and the self IDs buffer.
3635 */
3636 BUILD_BUG_ON(AR_BUFFERS * sizeof(struct descriptor) > PAGE_SIZE/4);
3637 BUILD_BUG_ON(SELF_ID_BUF_SIZE > PAGE_SIZE/2);
3638 ohci->misc_buffer = dma_alloc_coherent(ohci->card.device,
3639 PAGE_SIZE,
3640 &ohci->misc_buffer_bus,
3641 GFP_KERNEL);
3642 if (!ohci->misc_buffer) {
3643 err = -ENOMEM;
3644 goto fail_iounmap;
3645 }
3646
3647 err = ar_context_init(&ohci->ar_request_ctx, ohci, 0,
Clemens Ladisch7a39d8b2010-11-26 08:57:31 +01003648 OHCI1394_AsReqRcvContextControlSet);
3649 if (err < 0)
Clemens Ladischec766a72010-11-30 08:25:17 +01003650 goto fail_misc_buf;
Kristian Høgsberged568912006-12-19 19:58:35 -05003651
Clemens Ladischec766a72010-11-30 08:25:17 +01003652 err = ar_context_init(&ohci->ar_response_ctx, ohci, PAGE_SIZE/4,
Clemens Ladisch7a39d8b2010-11-26 08:57:31 +01003653 OHCI1394_AsRspRcvContextControlSet);
3654 if (err < 0)
3655 goto fail_arreq_ctx;
Kristian Høgsberged568912006-12-19 19:58:35 -05003656
Clemens Ladischc088ab302010-11-30 08:24:01 +01003657 err = context_init(&ohci->at_request_ctx, ohci,
3658 OHCI1394_AsReqTrContextControlSet, handle_at_packet);
3659 if (err < 0)
3660 goto fail_arrsp_ctx;
Kristian Høgsberged568912006-12-19 19:58:35 -05003661
Clemens Ladischc088ab302010-11-30 08:24:01 +01003662 err = context_init(&ohci->at_response_ctx, ohci,
3663 OHCI1394_AsRspTrContextControlSet, handle_at_packet);
3664 if (err < 0)
3665 goto fail_atreq_ctx;
Kristian Høgsberged568912006-12-19 19:58:35 -05003666
Kristian Høgsberged568912006-12-19 19:58:35 -05003667 reg_write(ohci, OHCI1394_IsoRecvIntMaskSet, ~0);
Stefan Richter4817ed22008-12-21 16:39:46 +01003668 ohci->ir_context_channels = ~0ULL;
Clemens Ladischf117a3e2011-01-10 17:21:35 +01003669 ohci->ir_context_support = reg_read(ohci, OHCI1394_IsoRecvIntMaskSet);
Stefan Richter4802f162010-02-21 17:58:52 +01003670 reg_write(ohci, OHCI1394_IsoRecvIntMaskClear, ~0);
Clemens Ladischf117a3e2011-01-10 17:21:35 +01003671 ohci->ir_context_mask = ohci->ir_context_support;
Maxim Levitskydd237362010-11-29 04:09:50 +02003672 ohci->n_ir = hweight32(ohci->ir_context_mask);
3673 size = sizeof(struct iso_context) * ohci->n_ir;
Kristian Høgsberged568912006-12-19 19:58:35 -05003674 ohci->ir_context_list = kzalloc(size, GFP_KERNEL);
3675
Stefan Richter4802f162010-02-21 17:58:52 +01003676 reg_write(ohci, OHCI1394_IsoXmitIntMaskSet, ~0);
Clemens Ladischf117a3e2011-01-10 17:21:35 +01003677 ohci->it_context_support = reg_read(ohci, OHCI1394_IsoXmitIntMaskSet);
Stefan Richter4802f162010-02-21 17:58:52 +01003678 reg_write(ohci, OHCI1394_IsoXmitIntMaskClear, ~0);
Clemens Ladischf117a3e2011-01-10 17:21:35 +01003679 ohci->it_context_mask = ohci->it_context_support;
Maxim Levitskydd237362010-11-29 04:09:50 +02003680 ohci->n_it = hweight32(ohci->it_context_mask);
3681 size = sizeof(struct iso_context) * ohci->n_it;
Stefan Richter4802f162010-02-21 17:58:52 +01003682 ohci->it_context_list = kzalloc(size, GFP_KERNEL);
3683
Kristian Høgsberged568912006-12-19 19:58:35 -05003684 if (ohci->it_context_list == NULL || ohci->ir_context_list == NULL) {
Kristian Høgsbergd79406d2007-05-09 19:23:15 -04003685 err = -ENOMEM;
Stefan Richter7007a072008-10-26 09:50:31 +01003686 goto fail_contexts;
Kristian Høgsberged568912006-12-19 19:58:35 -05003687 }
3688
Stefan Richteraf531222013-08-05 15:10:38 +02003689 ohci->self_id = ohci->misc_buffer + PAGE_SIZE/2;
Clemens Ladischec766a72010-11-30 08:25:17 +01003690 ohci->self_id_bus = ohci->misc_buffer_bus + PAGE_SIZE/2;
Kristian Høgsberged568912006-12-19 19:58:35 -05003691
Kristian Høgsberged568912006-12-19 19:58:35 -05003692 bus_options = reg_read(ohci, OHCI1394_BusOptions);
3693 max_receive = (bus_options >> 12) & 0xf;
3694 link_speed = bus_options & 0x7;
3695 guid = ((u64) reg_read(ohci, OHCI1394_GUIDHi) << 32) |
3696 reg_read(ohci, OHCI1394_GUIDLo);
3697
Peter Hurley247fd502013-03-27 06:59:58 -04003698 if (!(ohci->quirks & QUIRK_NO_MSI))
3699 pci_enable_msi(dev);
3700 if (request_irq(dev->irq, irq_handler,
3701 pci_dev_msi_enabled(dev) ? 0 : IRQF_SHARED,
3702 ohci_driver_name, ohci)) {
Peter Hurleyde97cb62013-03-26 11:54:06 -04003703 ohci_err(ohci, "failed to allocate interrupt %d\n", dev->irq);
Peter Hurley247fd502013-03-27 06:59:58 -04003704 err = -EIO;
3705 goto fail_msi;
3706 }
3707
Kristian Høgsbergd79406d2007-05-09 19:23:15 -04003708 err = fw_card_add(&ohci->card, max_receive, link_speed, guid);
Stefan Richtere1eff7a2009-02-03 17:55:19 +01003709 if (err)
Peter Hurley247fd502013-03-27 06:59:58 -04003710 goto fail_irq;
Kristian Høgsberged568912006-12-19 19:58:35 -05003711
Stefan Richter6fdb2ee2010-02-21 17:59:14 +01003712 version = reg_read(ohci, OHCI1394_Version) & 0x00ff00ff;
Peter Hurleyde97cb62013-03-26 11:54:06 -04003713 ohci_notice(ohci,
3714 "added OHCI v%x.%x device as card %d, "
Stefan Richterfcd46b32014-01-18 17:32:20 +01003715 "%d IR + %d IT contexts, quirks 0x%x%s\n",
Peter Hurleyde97cb62013-03-26 11:54:06 -04003716 version >> 16, version & 0xff, ohci->card.index,
Stefan Richterfcd46b32014-01-18 17:32:20 +01003717 ohci->n_ir, ohci->n_it, ohci->quirks,
3718 reg_read(ohci, OHCI1394_PhyUpperBound) ?
3719 ", >4 GB phys DMA" : "");
Stefan Richtere1eff7a2009-02-03 17:55:19 +01003720
Kristian Høgsberged568912006-12-19 19:58:35 -05003721 return 0;
Kristian Høgsbergd79406d2007-05-09 19:23:15 -04003722
Peter Hurley247fd502013-03-27 06:59:58 -04003723 fail_irq:
3724 free_irq(dev->irq, ohci);
3725 fail_msi:
3726 pci_disable_msi(dev);
Stefan Richter7007a072008-10-26 09:50:31 +01003727 fail_contexts:
Kristian Høgsbergd79406d2007-05-09 19:23:15 -04003728 kfree(ohci->ir_context_list);
Stefan Richter7007a072008-10-26 09:50:31 +01003729 kfree(ohci->it_context_list);
3730 context_release(&ohci->at_response_ctx);
Clemens Ladischc088ab302010-11-30 08:24:01 +01003731 fail_atreq_ctx:
Stefan Richter7007a072008-10-26 09:50:31 +01003732 context_release(&ohci->at_request_ctx);
Clemens Ladischc088ab302010-11-30 08:24:01 +01003733 fail_arrsp_ctx:
Stefan Richter7007a072008-10-26 09:50:31 +01003734 ar_context_release(&ohci->ar_response_ctx);
Clemens Ladisch7a39d8b2010-11-26 08:57:31 +01003735 fail_arreq_ctx:
Stefan Richter7007a072008-10-26 09:50:31 +01003736 ar_context_release(&ohci->ar_request_ctx);
Clemens Ladischec766a72010-11-30 08:25:17 +01003737 fail_misc_buf:
3738 dma_free_coherent(ohci->card.device, PAGE_SIZE,
3739 ohci->misc_buffer, ohci->misc_buffer_bus);
Clemens Ladisch7a39d8b2010-11-26 08:57:31 +01003740 fail_iounmap:
Kristian Høgsbergd79406d2007-05-09 19:23:15 -04003741 pci_iounmap(dev, ohci->registers);
3742 fail_iomem:
3743 pci_release_region(dev, 0);
3744 fail_disable:
3745 pci_disable_device(dev);
Stefan Richterbd7dee62008-02-24 18:59:55 +01003746 fail_free:
Oleg Drokind838d2c02011-03-11 04:17:27 +03003747 kfree(ohci);
Stefan Richter5da3dac2010-04-02 14:05:02 +02003748 pmac_ohci_off(dev);
Stefan Richter7007a072008-10-26 09:50:31 +01003749 fail:
Kristian Høgsbergd79406d2007-05-09 19:23:15 -04003750 return err;
Kristian Høgsberged568912006-12-19 19:58:35 -05003751}
3752
3753static void pci_remove(struct pci_dev *dev)
3754{
Peter Hurley8db49142013-03-27 06:59:59 -04003755 struct fw_ohci *ohci = pci_get_drvdata(dev);
Kristian Høgsberged568912006-12-19 19:58:35 -05003756
Peter Hurley8db49142013-03-27 06:59:59 -04003757 /*
3758 * If the removal is happening from the suspend state, LPS won't be
3759 * enabled and host registers (eg., IntMaskClear) won't be accessible.
3760 */
3761 if (reg_read(ohci, OHCI1394_HCControlSet) & OHCI1394_HCControl_LPS) {
3762 reg_write(ohci, OHCI1394_IntMaskClear, ~0);
3763 flush_writes(ohci);
3764 }
Stephan Gatzka2d7a36e2011-07-25 22:16:24 +02003765 cancel_work_sync(&ohci->bus_reset_work);
Kristian Høgsberged568912006-12-19 19:58:35 -05003766 fw_core_remove_card(&ohci->card);
3767
Kristian Høgsbergc781c062007-05-07 20:33:32 -04003768 /*
3769 * FIXME: Fail all pending packets here, now that the upper
3770 * layers can't queue any more.
3771 */
Kristian Høgsberged568912006-12-19 19:58:35 -05003772
3773 software_reset(ohci);
3774 free_irq(dev->irq, ohci);
Jay Fenlasona55709b2008-10-22 15:59:42 -04003775
3776 if (ohci->next_config_rom && ohci->next_config_rom != ohci->config_rom)
3777 dma_free_coherent(ohci->card.device, CONFIG_ROM_SIZE,
3778 ohci->next_config_rom, ohci->next_config_rom_bus);
3779 if (ohci->config_rom)
3780 dma_free_coherent(ohci->card.device, CONFIG_ROM_SIZE,
3781 ohci->config_rom, ohci->config_rom_bus);
Jay Fenlasona55709b2008-10-22 15:59:42 -04003782 ar_context_release(&ohci->ar_request_ctx);
3783 ar_context_release(&ohci->ar_response_ctx);
Clemens Ladischec766a72010-11-30 08:25:17 +01003784 dma_free_coherent(ohci->card.device, PAGE_SIZE,
3785 ohci->misc_buffer, ohci->misc_buffer_bus);
Jay Fenlasona55709b2008-10-22 15:59:42 -04003786 context_release(&ohci->at_request_ctx);
3787 context_release(&ohci->at_response_ctx);
Kristian Høgsbergd79406d2007-05-09 19:23:15 -04003788 kfree(ohci->it_context_list);
3789 kfree(ohci->ir_context_list);
Clemens Ladisch262444e2010-06-05 12:31:25 +02003790 pci_disable_msi(dev);
Kristian Høgsbergd79406d2007-05-09 19:23:15 -04003791 pci_iounmap(dev, ohci->registers);
3792 pci_release_region(dev, 0);
3793 pci_disable_device(dev);
Oleg Drokind838d2c02011-03-11 04:17:27 +03003794 kfree(ohci);
Stefan Richter5da3dac2010-04-02 14:05:02 +02003795 pmac_ohci_off(dev);
Stefan Richterea8d0062008-03-01 02:42:56 +01003796
Stefan Richter64d21722011-12-20 21:32:46 +01003797 dev_notice(&dev->dev, "removed fw-ohci device\n");
Kristian Høgsberged568912006-12-19 19:58:35 -05003798}
3799
Kristian Høgsberg2aef4692007-05-30 19:06:35 -04003800#ifdef CONFIG_PM
Stefan Richter2ed0f182008-03-01 12:35:29 +01003801static int pci_suspend(struct pci_dev *dev, pm_message_t state)
Kristian Høgsberg2aef4692007-05-30 19:06:35 -04003802{
Stefan Richter2ed0f182008-03-01 12:35:29 +01003803 struct fw_ohci *ohci = pci_get_drvdata(dev);
Kristian Høgsberg2aef4692007-05-30 19:06:35 -04003804 int err;
3805
3806 software_reset(ohci);
Stefan Richter2ed0f182008-03-01 12:35:29 +01003807 err = pci_save_state(dev);
Kristian Høgsberg2aef4692007-05-30 19:06:35 -04003808 if (err) {
Peter Hurleyde97cb62013-03-26 11:54:06 -04003809 ohci_err(ohci, "pci_save_state failed\n");
Kristian Høgsberg2aef4692007-05-30 19:06:35 -04003810 return err;
3811 }
Stefan Richter2ed0f182008-03-01 12:35:29 +01003812 err = pci_set_power_state(dev, pci_choose_state(dev, state));
Stefan Richter55111422007-09-06 09:50:30 +02003813 if (err)
Peter Hurleyde97cb62013-03-26 11:54:06 -04003814 ohci_err(ohci, "pci_set_power_state failed with %d\n", err);
Stefan Richter5da3dac2010-04-02 14:05:02 +02003815 pmac_ohci_off(dev);
Stefan Richterea8d0062008-03-01 02:42:56 +01003816
Kristian Høgsberg2aef4692007-05-30 19:06:35 -04003817 return 0;
3818}
3819
Stefan Richter2ed0f182008-03-01 12:35:29 +01003820static int pci_resume(struct pci_dev *dev)
Kristian Høgsberg2aef4692007-05-30 19:06:35 -04003821{
Stefan Richter2ed0f182008-03-01 12:35:29 +01003822 struct fw_ohci *ohci = pci_get_drvdata(dev);
Kristian Høgsberg2aef4692007-05-30 19:06:35 -04003823 int err;
3824
Stefan Richter5da3dac2010-04-02 14:05:02 +02003825 pmac_ohci_on(dev);
Stefan Richter2ed0f182008-03-01 12:35:29 +01003826 pci_set_power_state(dev, PCI_D0);
3827 pci_restore_state(dev);
3828 err = pci_enable_device(dev);
Kristian Høgsberg2aef4692007-05-30 19:06:35 -04003829 if (err) {
Peter Hurleyde97cb62013-03-26 11:54:06 -04003830 ohci_err(ohci, "pci_enable_device failed\n");
Kristian Høgsberg2aef4692007-05-30 19:06:35 -04003831 return err;
3832 }
3833
Maxim Levitsky8662b6b2010-11-29 04:09:49 +02003834 /* Some systems don't setup GUID register on resume from ram */
3835 if (!reg_read(ohci, OHCI1394_GUIDLo) &&
3836 !reg_read(ohci, OHCI1394_GUIDHi)) {
3837 reg_write(ohci, OHCI1394_GUIDLo, (u32)ohci->card.guid);
3838 reg_write(ohci, OHCI1394_GUIDHi, (u32)(ohci->card.guid >> 32));
3839 }
3840
Maxim Levitskydd237362010-11-29 04:09:50 +02003841 err = ohci_enable(&ohci->card, NULL, 0);
Maxim Levitskydd237362010-11-29 04:09:50 +02003842 if (err)
3843 return err;
3844
3845 ohci_resume_iso_dma(ohci);
Stefan Richter693a50b2011-01-01 15:17:05 +01003846
Maxim Levitskydd237362010-11-29 04:09:50 +02003847 return 0;
Kristian Høgsberg2aef4692007-05-30 19:06:35 -04003848}
3849#endif
3850
Németh Mártona67483d2010-01-10 13:14:26 +01003851static const struct pci_device_id pci_table[] = {
Kristian Høgsberged568912006-12-19 19:58:35 -05003852 { PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_FIREWIRE_OHCI, ~0) },
3853 { }
3854};
3855
3856MODULE_DEVICE_TABLE(pci, pci_table);
3857
3858static struct pci_driver fw_ohci_pci_driver = {
3859 .name = ohci_driver_name,
3860 .id_table = pci_table,
3861 .probe = pci_probe,
3862 .remove = pci_remove,
Kristian Høgsberg2aef4692007-05-30 19:06:35 -04003863#ifdef CONFIG_PM
3864 .resume = pci_resume,
3865 .suspend = pci_suspend,
3866#endif
Kristian Høgsberged568912006-12-19 19:58:35 -05003867};
3868
Stephan Gatzka7a723c62013-08-26 20:50:04 +02003869static int __init fw_ohci_init(void)
3870{
Stephan Gatzkadb9ae8f2013-08-26 20:50:05 +02003871 selfid_workqueue = alloc_workqueue(KBUILD_MODNAME, WQ_MEM_RECLAIM, 0);
3872 if (!selfid_workqueue)
3873 return -ENOMEM;
3874
Stephan Gatzka7a723c62013-08-26 20:50:04 +02003875 return pci_register_driver(&fw_ohci_pci_driver);
3876}
3877
3878static void __exit fw_ohci_cleanup(void)
3879{
3880 pci_unregister_driver(&fw_ohci_pci_driver);
Stephan Gatzkadb9ae8f2013-08-26 20:50:05 +02003881 destroy_workqueue(selfid_workqueue);
Stephan Gatzka7a723c62013-08-26 20:50:04 +02003882}
3883
3884module_init(fw_ohci_init);
3885module_exit(fw_ohci_cleanup);
Axel Linfe2af112012-04-03 10:07:01 +08003886
Kristian Høgsberged568912006-12-19 19:58:35 -05003887MODULE_AUTHOR("Kristian Hoegsberg <krh@bitplanet.net>");
3888MODULE_DESCRIPTION("Driver for PCI OHCI IEEE1394 controllers");
3889MODULE_LICENSE("GPL");
3890
Olaf Hering1e4c7b02007-05-05 23:17:13 +02003891/* Provide a module alias so root-on-sbp2 initrds don't break. */
Olaf Hering1e4c7b02007-05-05 23:17:13 +02003892MODULE_ALIAS("ohci1394");