Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2005-2007 Kristian Hoegsberg <krh@bitplanet.net> |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License as published by |
| 6 | * the Free Software Foundation; either version 2 of the License, or |
| 7 | * (at your option) any later version. |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this program; if not, write to the Free Software Foundation, |
| 16 | * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 17 | */ |
| 18 | |
Stefan Richter | e8ca970 | 2009-06-04 21:09:38 +0200 | [diff] [blame] | 19 | #include <linux/bug.h> |
Stefan Richter | 459f792 | 2008-05-24 16:50:22 +0200 | [diff] [blame] | 20 | #include <linux/completion.h> |
| 21 | #include <linux/crc-itu-t.h> |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 22 | #include <linux/device.h> |
Stefan Richter | 459f792 | 2008-05-24 16:50:22 +0200 | [diff] [blame] | 23 | #include <linux/errno.h> |
Stefan Richter | 77c9a5d | 2009-06-05 16:26:18 +0200 | [diff] [blame] | 24 | #include <linux/firewire.h> |
| 25 | #include <linux/firewire-constants.h> |
Stefan Richter | e8ca970 | 2009-06-04 21:09:38 +0200 | [diff] [blame] | 26 | #include <linux/jiffies.h> |
| 27 | #include <linux/kernel.h> |
Stefan Richter | 459f792 | 2008-05-24 16:50:22 +0200 | [diff] [blame] | 28 | #include <linux/kref.h> |
Stefan Richter | e8ca970 | 2009-06-04 21:09:38 +0200 | [diff] [blame] | 29 | #include <linux/list.h> |
Stefan Richter | 459f792 | 2008-05-24 16:50:22 +0200 | [diff] [blame] | 30 | #include <linux/module.h> |
Kristian Høgsberg | 6a5033b | 2007-05-07 20:33:33 -0400 | [diff] [blame] | 31 | #include <linux/mutex.h> |
Stefan Richter | e8ca970 | 2009-06-04 21:09:38 +0200 | [diff] [blame] | 32 | #include <linux/spinlock.h> |
| 33 | #include <linux/timer.h> |
| 34 | #include <linux/workqueue.h> |
Stefan Richter | 459f792 | 2008-05-24 16:50:22 +0200 | [diff] [blame] | 35 | |
Stefan Richter | e8ca970 | 2009-06-04 21:09:38 +0200 | [diff] [blame] | 36 | #include <asm/atomic.h> |
| 37 | #include <asm/byteorder.h> |
| 38 | |
Stefan Richter | 77c9a5d | 2009-06-05 16:26:18 +0200 | [diff] [blame] | 39 | #include "core.h" |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 40 | |
Kristian Høgsberg | e175569 | 2007-05-07 20:33:31 -0400 | [diff] [blame] | 41 | int fw_compute_block_crc(u32 *block) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 42 | { |
Kristian Høgsberg | e175569 | 2007-05-07 20:33:31 -0400 | [diff] [blame] | 43 | __be32 be32_block[256]; |
| 44 | int i, length; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 45 | |
Kristian Høgsberg | e175569 | 2007-05-07 20:33:31 -0400 | [diff] [blame] | 46 | length = (*block >> 16) & 0xff; |
| 47 | for (i = 0; i < length; i++) |
| 48 | be32_block[i] = cpu_to_be32(block[i + 1]); |
| 49 | *block |= crc_itu_t(0, (u8 *) be32_block, length * 4); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 50 | |
Kristian Høgsberg | e175569 | 2007-05-07 20:33:31 -0400 | [diff] [blame] | 51 | return length; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 52 | } |
| 53 | |
Kristian Høgsberg | 6a5033b | 2007-05-07 20:33:33 -0400 | [diff] [blame] | 54 | static DEFINE_MUTEX(card_mutex); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 55 | static LIST_HEAD(card_list); |
| 56 | |
| 57 | static LIST_HEAD(descriptor_list); |
| 58 | static int descriptor_count; |
| 59 | |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 60 | #define BIB_CRC(v) ((v) << 0) |
| 61 | #define BIB_CRC_LENGTH(v) ((v) << 16) |
| 62 | #define BIB_INFO_LENGTH(v) ((v) << 24) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 63 | |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 64 | #define BIB_LINK_SPEED(v) ((v) << 0) |
| 65 | #define BIB_GENERATION(v) ((v) << 4) |
| 66 | #define BIB_MAX_ROM(v) ((v) << 8) |
| 67 | #define BIB_MAX_RECEIVE(v) ((v) << 12) |
| 68 | #define BIB_CYC_CLK_ACC(v) ((v) << 16) |
| 69 | #define BIB_PMC ((1) << 27) |
| 70 | #define BIB_BMC ((1) << 28) |
| 71 | #define BIB_ISC ((1) << 29) |
| 72 | #define BIB_CMC ((1) << 30) |
| 73 | #define BIB_IMC ((1) << 31) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 74 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 75 | static u32 *generate_config_rom(struct fw_card *card, size_t *config_rom_length) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 76 | { |
| 77 | struct fw_descriptor *desc; |
| 78 | static u32 config_rom[256]; |
| 79 | int i, j, length; |
| 80 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 81 | /* |
| 82 | * Initialize contents of config rom buffer. On the OHCI |
Stefan Richter | 5e20c28 | 2007-01-21 20:44:09 +0100 | [diff] [blame] | 83 | * controller, block reads to the config rom accesses the host |
| 84 | * memory, but quadlet read access the hardware bus info block |
| 85 | * registers. That's just crack, but it means we should make |
Jay Fenlason | 2cc489c | 2008-10-22 15:59:42 -0400 | [diff] [blame] | 86 | * sure the contents of bus info block in host memory matches |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 87 | * the version stored in the OHCI registers. |
| 88 | */ |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 89 | |
Kristian Høgsberg | 2d826cc | 2007-05-09 19:23:14 -0400 | [diff] [blame] | 90 | memset(config_rom, 0, sizeof(config_rom)); |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 91 | config_rom[0] = BIB_CRC_LENGTH(4) | BIB_INFO_LENGTH(4) | BIB_CRC(0); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 92 | config_rom[1] = 0x31333934; |
| 93 | |
| 94 | config_rom[2] = |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 95 | BIB_LINK_SPEED(card->link_speed) | |
| 96 | BIB_GENERATION(card->config_rom_generation++ % 14 + 2) | |
| 97 | BIB_MAX_ROM(2) | |
| 98 | BIB_MAX_RECEIVE(card->max_receive) | |
| 99 | BIB_BMC | BIB_ISC | BIB_CMC | BIB_IMC; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 100 | config_rom[3] = card->guid >> 32; |
| 101 | config_rom[4] = card->guid; |
| 102 | |
| 103 | /* Generate root directory. */ |
| 104 | i = 5; |
| 105 | config_rom[i++] = 0; |
| 106 | config_rom[i++] = 0x0c0083c0; /* node capabilities */ |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 107 | j = i + descriptor_count; |
| 108 | |
| 109 | /* Generate root directory entries for descriptors. */ |
| 110 | list_for_each_entry (desc, &descriptor_list, link) { |
Kristian Høgsberg | 937f687 | 2007-03-07 12:12:36 -0500 | [diff] [blame] | 111 | if (desc->immediate > 0) |
| 112 | config_rom[i++] = desc->immediate; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 113 | config_rom[i] = desc->key | (j - i); |
| 114 | i++; |
| 115 | j += desc->length; |
| 116 | } |
| 117 | |
| 118 | /* Update root directory length. */ |
| 119 | config_rom[5] = (i - 5 - 1) << 16; |
| 120 | |
| 121 | /* End of root directory, now copy in descriptors. */ |
| 122 | list_for_each_entry (desc, &descriptor_list, link) { |
| 123 | memcpy(&config_rom[i], desc->data, desc->length * 4); |
| 124 | i += desc->length; |
| 125 | } |
| 126 | |
| 127 | /* Calculate CRCs for all blocks in the config rom. This |
| 128 | * assumes that CRC length and info length are identical for |
| 129 | * the bus info block, which is always the case for this |
| 130 | * implementation. */ |
Kristian Høgsberg | e175569 | 2007-05-07 20:33:31 -0400 | [diff] [blame] | 131 | for (i = 0; i < j; i += length + 1) |
| 132 | length = fw_compute_block_crc(config_rom + i); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 133 | |
| 134 | *config_rom_length = j; |
| 135 | |
| 136 | return config_rom; |
| 137 | } |
| 138 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 139 | static void update_config_roms(void) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 140 | { |
| 141 | struct fw_card *card; |
| 142 | u32 *config_rom; |
| 143 | size_t length; |
| 144 | |
| 145 | list_for_each_entry (card, &card_list, link) { |
| 146 | config_rom = generate_config_rom(card, &length); |
| 147 | card->driver->set_config_rom(card, config_rom, length); |
| 148 | } |
| 149 | } |
| 150 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 151 | int fw_core_add_descriptor(struct fw_descriptor *desc) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 152 | { |
| 153 | size_t i; |
| 154 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 155 | /* |
| 156 | * Check descriptor is valid; the length of all blocks in the |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 157 | * descriptor has to add up to exactly the length of the |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 158 | * block. |
| 159 | */ |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 160 | i = 0; |
| 161 | while (i < desc->length) |
| 162 | i += (desc->data[i] >> 16) + 1; |
| 163 | |
| 164 | if (i != desc->length) |
Kristian Høgsberg | 66dea3e | 2007-03-28 21:26:42 +0200 | [diff] [blame] | 165 | return -EINVAL; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 166 | |
Kristian Høgsberg | 6a5033b | 2007-05-07 20:33:33 -0400 | [diff] [blame] | 167 | mutex_lock(&card_mutex); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 168 | |
Kristian Høgsberg | a98e271 | 2007-05-07 20:33:34 -0400 | [diff] [blame] | 169 | list_add_tail(&desc->link, &descriptor_list); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 170 | descriptor_count++; |
Kristian Høgsberg | 937f687 | 2007-03-07 12:12:36 -0500 | [diff] [blame] | 171 | if (desc->immediate > 0) |
| 172 | descriptor_count++; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 173 | update_config_roms(); |
| 174 | |
Kristian Høgsberg | 6a5033b | 2007-05-07 20:33:33 -0400 | [diff] [blame] | 175 | mutex_unlock(&card_mutex); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 176 | |
| 177 | return 0; |
| 178 | } |
Jay Fenlason | c76acec | 2009-05-18 13:08:06 -0400 | [diff] [blame] | 179 | EXPORT_SYMBOL(fw_core_add_descriptor); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 180 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 181 | void fw_core_remove_descriptor(struct fw_descriptor *desc) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 182 | { |
Kristian Høgsberg | 6a5033b | 2007-05-07 20:33:33 -0400 | [diff] [blame] | 183 | mutex_lock(&card_mutex); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 184 | |
| 185 | list_del(&desc->link); |
| 186 | descriptor_count--; |
Kristian Høgsberg | 937f687 | 2007-03-07 12:12:36 -0500 | [diff] [blame] | 187 | if (desc->immediate > 0) |
| 188 | descriptor_count--; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 189 | update_config_roms(); |
| 190 | |
Kristian Høgsberg | 6a5033b | 2007-05-07 20:33:33 -0400 | [diff] [blame] | 191 | mutex_unlock(&card_mutex); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 192 | } |
Jay Fenlason | c76acec | 2009-05-18 13:08:06 -0400 | [diff] [blame] | 193 | EXPORT_SYMBOL(fw_core_remove_descriptor); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 194 | |
Stefan Richter | cbae787 | 2009-03-10 21:08:37 +0100 | [diff] [blame] | 195 | static void allocate_broadcast_channel(struct fw_card *card, int generation) |
Jay Fenlason | 6104ee9 | 2009-02-23 15:59:34 -0500 | [diff] [blame] | 196 | { |
Stefan Richter | cbae787 | 2009-03-10 21:08:37 +0100 | [diff] [blame] | 197 | int channel, bandwidth = 0; |
Jay Fenlason | 6104ee9 | 2009-02-23 15:59:34 -0500 | [diff] [blame] | 198 | |
Stefan Richter | cbae787 | 2009-03-10 21:08:37 +0100 | [diff] [blame] | 199 | fw_iso_resource_manage(card, generation, 1ULL << 31, |
| 200 | &channel, &bandwidth, true); |
| 201 | if (channel == 31) { |
Stefan Richter | 7889b60 | 2009-03-10 21:09:28 +0100 | [diff] [blame] | 202 | card->broadcast_channel_allocated = true; |
| 203 | device_for_each_child(card->device, (void *)(long)generation, |
Stefan Richter | 099d541 | 2009-06-06 18:37:25 +0200 | [diff] [blame] | 204 | fw_device_set_broadcast_channel); |
Jay Fenlason | 6104ee9 | 2009-02-23 15:59:34 -0500 | [diff] [blame] | 205 | } |
Jay Fenlason | 6104ee9 | 2009-02-23 15:59:34 -0500 | [diff] [blame] | 206 | } |
Jay Fenlason | 6104ee9 | 2009-02-23 15:59:34 -0500 | [diff] [blame] | 207 | |
Kristian Høgsberg | 83db801 | 2007-01-26 00:37:50 -0500 | [diff] [blame] | 208 | static const char gap_count_table[] = { |
| 209 | 63, 5, 7, 8, 10, 13, 16, 18, 21, 24, 26, 29, 32, 35, 37, 40 |
| 210 | }; |
| 211 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 212 | void fw_schedule_bm_work(struct fw_card *card, unsigned long delay) |
Jay Fenlason | 0fa1986f | 2008-11-29 17:44:57 +0100 | [diff] [blame] | 213 | { |
| 214 | int scheduled; |
| 215 | |
| 216 | fw_card_get(card); |
| 217 | scheduled = schedule_delayed_work(&card->work, delay); |
| 218 | if (!scheduled) |
| 219 | fw_card_put(card); |
| 220 | } |
| 221 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 222 | static void fw_card_bm_work(struct work_struct *work) |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 223 | { |
Kristian Høgsberg | 83db801 | 2007-01-26 00:37:50 -0500 | [diff] [blame] | 224 | struct fw_card *card = container_of(work, struct fw_card, work.work); |
Stefan Richter | cbae787 | 2009-03-10 21:08:37 +0100 | [diff] [blame] | 225 | struct fw_device *root_device; |
| 226 | struct fw_node *root_node; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 227 | unsigned long flags; |
Stefan Richter | cbae787 | 2009-03-10 21:08:37 +0100 | [diff] [blame] | 228 | int root_id, new_root_id, irm_id, local_id; |
| 229 | int gap_count, generation, grace, rcode; |
Stefan Richter | 25b1c3d | 2008-03-24 20:57:12 +0100 | [diff] [blame] | 230 | bool do_reset = false; |
Stefan Richter | 6230582 | 2009-01-09 20:49:37 +0100 | [diff] [blame] | 231 | bool root_device_is_running; |
| 232 | bool root_device_is_cmc; |
Jay Fenlason | 1e119fa | 2008-07-20 14:20:53 +0200 | [diff] [blame] | 233 | __be32 lock_data[2]; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 234 | |
| 235 | spin_lock_irqsave(&card->lock, flags); |
Stefan Richter | 1580347 | 2008-02-24 18:57:23 +0100 | [diff] [blame] | 236 | |
Stefan Richter | cbae787 | 2009-03-10 21:08:37 +0100 | [diff] [blame] | 237 | if (card->local_node == NULL) { |
Stefan Richter | 1580347 | 2008-02-24 18:57:23 +0100 | [diff] [blame] | 238 | spin_unlock_irqrestore(&card->lock, flags); |
Jay Fenlason | 0fa1986f | 2008-11-29 17:44:57 +0100 | [diff] [blame] | 239 | goto out_put_card; |
Stefan Richter | 1580347 | 2008-02-24 18:57:23 +0100 | [diff] [blame] | 240 | } |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 241 | |
| 242 | generation = card->generation; |
Stefan Richter | cbae787 | 2009-03-10 21:08:37 +0100 | [diff] [blame] | 243 | root_node = card->root_node; |
| 244 | fw_node_get(root_node); |
Stefan Richter | 1580347 | 2008-02-24 18:57:23 +0100 | [diff] [blame] | 245 | root_device = root_node->data; |
Stefan Richter | 6230582 | 2009-01-09 20:49:37 +0100 | [diff] [blame] | 246 | root_device_is_running = root_device && |
| 247 | atomic_read(&root_device->state) == FW_DEVICE_RUNNING; |
| 248 | root_device_is_cmc = root_device && root_device->cmc; |
Stefan Richter | cbae787 | 2009-03-10 21:08:37 +0100 | [diff] [blame] | 249 | root_id = root_node->node_id; |
| 250 | irm_id = card->irm_node->node_id; |
| 251 | local_id = card->local_node->node_id; |
Stefan Richter | e1dc7ca | 2009-03-10 21:07:46 +0100 | [diff] [blame] | 252 | |
| 253 | grace = time_after(jiffies, card->reset_jiffies + DIV_ROUND_UP(HZ, 8)); |
| 254 | |
Stefan Richter | 8cd0bbb | 2008-03-24 20:56:40 +0100 | [diff] [blame] | 255 | if (is_next_generation(generation, card->bm_generation) || |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 256 | (card->bm_generation != generation && grace)) { |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 257 | /* |
| 258 | * This first step is to figure out who is IRM and |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 259 | * then try to become bus manager. If the IRM is not |
| 260 | * well defined (e.g. does not have an active link |
| 261 | * layer or does not responds to our lock request, we |
| 262 | * will have to do a little vigilante bus management. |
| 263 | * In that case, we do a goto into the gap count logic |
| 264 | * so that when we do the reset, we still optimize the |
| 265 | * gap count. That could well save a reset in the |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 266 | * next generation. |
| 267 | */ |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 268 | |
Stefan Richter | cbae787 | 2009-03-10 21:08:37 +0100 | [diff] [blame] | 269 | if (!card->irm_node->link_on) { |
| 270 | new_root_id = local_id; |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 271 | fw_notify("IRM has link off, making local node (%02x) root.\n", |
| 272 | new_root_id); |
| 273 | goto pick_me; |
| 274 | } |
| 275 | |
Jay Fenlason | 1e119fa | 2008-07-20 14:20:53 +0200 | [diff] [blame] | 276 | lock_data[0] = cpu_to_be32(0x3f); |
Stefan Richter | cbae787 | 2009-03-10 21:08:37 +0100 | [diff] [blame] | 277 | lock_data[1] = cpu_to_be32(local_id); |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 278 | |
| 279 | spin_unlock_irqrestore(&card->lock, flags); |
| 280 | |
Jay Fenlason | 1e119fa | 2008-07-20 14:20:53 +0200 | [diff] [blame] | 281 | rcode = fw_run_transaction(card, TCODE_LOCK_COMPARE_SWAP, |
| 282 | irm_id, generation, SCODE_100, |
| 283 | CSR_REGISTER_BASE + CSR_BUS_MANAGER_ID, |
| 284 | lock_data, sizeof(lock_data)); |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 285 | |
Jay Fenlason | 1e119fa | 2008-07-20 14:20:53 +0200 | [diff] [blame] | 286 | if (rcode == RCODE_GENERATION) |
| 287 | /* Another bus reset, BM work has been rescheduled. */ |
Stefan Richter | 1580347 | 2008-02-24 18:57:23 +0100 | [diff] [blame] | 288 | goto out; |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 289 | |
Jay Fenlason | 1e119fa | 2008-07-20 14:20:53 +0200 | [diff] [blame] | 290 | if (rcode == RCODE_COMPLETE && |
Jay Fenlason | 6104ee9 | 2009-02-23 15:59:34 -0500 | [diff] [blame] | 291 | lock_data[0] != cpu_to_be32(0x3f)) { |
Stefan Richter | cbae787 | 2009-03-10 21:08:37 +0100 | [diff] [blame] | 292 | |
| 293 | /* Somebody else is BM. Only act as IRM. */ |
| 294 | if (local_id == irm_id) |
| 295 | allocate_broadcast_channel(card, generation); |
| 296 | |
Stefan Richter | 1580347 | 2008-02-24 18:57:23 +0100 | [diff] [blame] | 297 | goto out; |
Jay Fenlason | 6104ee9 | 2009-02-23 15:59:34 -0500 | [diff] [blame] | 298 | } |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 299 | |
| 300 | spin_lock_irqsave(&card->lock, flags); |
Jay Fenlason | 1e119fa | 2008-07-20 14:20:53 +0200 | [diff] [blame] | 301 | |
| 302 | if (rcode != RCODE_COMPLETE) { |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 303 | /* |
| 304 | * The lock request failed, maybe the IRM |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 305 | * isn't really IRM capable after all. Let's |
| 306 | * do a bus reset and pick the local node as |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 307 | * root, and thus, IRM. |
| 308 | */ |
Stefan Richter | cbae787 | 2009-03-10 21:08:37 +0100 | [diff] [blame] | 309 | new_root_id = local_id; |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 310 | fw_notify("BM lock failed, making local node (%02x) root.\n", |
| 311 | new_root_id); |
| 312 | goto pick_me; |
| 313 | } |
| 314 | } else if (card->bm_generation != generation) { |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 315 | /* |
Stefan Richter | e1dc7ca | 2009-03-10 21:07:46 +0100 | [diff] [blame] | 316 | * We weren't BM in the last generation, and the last |
| 317 | * bus reset is less than 125ms ago. Reschedule this job. |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 318 | */ |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 319 | spin_unlock_irqrestore(&card->lock, flags); |
Stefan Richter | e1dc7ca | 2009-03-10 21:07:46 +0100 | [diff] [blame] | 320 | fw_schedule_bm_work(card, DIV_ROUND_UP(HZ, 8)); |
Stefan Richter | 1580347 | 2008-02-24 18:57:23 +0100 | [diff] [blame] | 321 | goto out; |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 322 | } |
| 323 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 324 | /* |
| 325 | * We're bus manager for this generation, so next step is to |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 326 | * make sure we have an active cycle master and do gap count |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 327 | * optimization. |
| 328 | */ |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 329 | card->bm_generation = generation; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 330 | |
Stefan Richter | 1580347 | 2008-02-24 18:57:23 +0100 | [diff] [blame] | 331 | if (root_device == NULL) { |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 332 | /* |
| 333 | * Either link_on is false, or we failed to read the |
| 334 | * config rom. In either case, pick another root. |
| 335 | */ |
Stefan Richter | cbae787 | 2009-03-10 21:08:37 +0100 | [diff] [blame] | 336 | new_root_id = local_id; |
Stefan Richter | 6230582 | 2009-01-09 20:49:37 +0100 | [diff] [blame] | 337 | } else if (!root_device_is_running) { |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 338 | /* |
| 339 | * If we haven't probed this device yet, bail out now |
| 340 | * and let's try again once that's done. |
| 341 | */ |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 342 | spin_unlock_irqrestore(&card->lock, flags); |
Stefan Richter | 1580347 | 2008-02-24 18:57:23 +0100 | [diff] [blame] | 343 | goto out; |
Stefan Richter | 6230582 | 2009-01-09 20:49:37 +0100 | [diff] [blame] | 344 | } else if (root_device_is_cmc) { |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 345 | /* |
| 346 | * FIXME: I suppose we should set the cmstr bit in the |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 347 | * STATE_CLEAR register of this node, as described in |
| 348 | * 1394-1995, 8.4.2.6. Also, send out a force root |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 349 | * packet for this node. |
| 350 | */ |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 351 | new_root_id = root_id; |
Kristian Høgsberg | 83db801 | 2007-01-26 00:37:50 -0500 | [diff] [blame] | 352 | } else { |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 353 | /* |
| 354 | * Current root has an active link layer and we |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 355 | * successfully read the config rom, but it's not |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 356 | * cycle master capable. |
| 357 | */ |
Stefan Richter | cbae787 | 2009-03-10 21:08:37 +0100 | [diff] [blame] | 358 | new_root_id = local_id; |
Kristian Høgsberg | 83db801 | 2007-01-26 00:37:50 -0500 | [diff] [blame] | 359 | } |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 360 | |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 361 | pick_me: |
Stefan Richter | 24d4012 | 2007-06-18 19:44:12 +0200 | [diff] [blame] | 362 | /* |
| 363 | * Pick a gap count from 1394a table E-1. The table doesn't cover |
| 364 | * the typically much larger 1394b beta repeater delays though. |
| 365 | */ |
| 366 | if (!card->beta_repeaters_present && |
Stefan Richter | 1580347 | 2008-02-24 18:57:23 +0100 | [diff] [blame] | 367 | root_node->max_hops < ARRAY_SIZE(gap_count_table)) |
| 368 | gap_count = gap_count_table[root_node->max_hops]; |
Kristian Høgsberg | 83db801 | 2007-01-26 00:37:50 -0500 | [diff] [blame] | 369 | else |
| 370 | gap_count = 63; |
| 371 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 372 | /* |
Stefan Richter | 25b1c3d | 2008-03-24 20:57:12 +0100 | [diff] [blame] | 373 | * Finally, figure out if we should do a reset or not. If we have |
| 374 | * done less than 5 resets with the same physical topology and we |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 375 | * have either a new root or a new gap count setting, let's do it. |
| 376 | */ |
Kristian Høgsberg | 83db801 | 2007-01-26 00:37:50 -0500 | [diff] [blame] | 377 | |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 378 | if (card->bm_retries++ < 5 && |
| 379 | (card->gap_count != gap_count || new_root_id != root_id)) |
Stefan Richter | 25b1c3d | 2008-03-24 20:57:12 +0100 | [diff] [blame] | 380 | do_reset = true; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 381 | |
| 382 | spin_unlock_irqrestore(&card->lock, flags); |
| 383 | |
Kristian Høgsberg | 83db801 | 2007-01-26 00:37:50 -0500 | [diff] [blame] | 384 | if (do_reset) { |
| 385 | fw_notify("phy config: card %d, new root=%x, gap_count=%d\n", |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 386 | card->index, new_root_id, gap_count); |
| 387 | fw_send_phy_config(card, new_root_id, generation, gap_count); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 388 | fw_core_initiate_bus_reset(card, 1); |
Stefan Richter | cbae787 | 2009-03-10 21:08:37 +0100 | [diff] [blame] | 389 | /* Will allocate broadcast channel after the reset. */ |
| 390 | } else { |
| 391 | if (local_id == irm_id) |
| 392 | allocate_broadcast_channel(card, generation); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 393 | } |
Jay Fenlason | 6104ee9 | 2009-02-23 15:59:34 -0500 | [diff] [blame] | 394 | |
Stefan Richter | 1580347 | 2008-02-24 18:57:23 +0100 | [diff] [blame] | 395 | out: |
Stefan Richter | 1580347 | 2008-02-24 18:57:23 +0100 | [diff] [blame] | 396 | fw_node_put(root_node); |
Jay Fenlason | 0fa1986f | 2008-11-29 17:44:57 +0100 | [diff] [blame] | 397 | out_put_card: |
| 398 | fw_card_put(card); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 399 | } |
| 400 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 401 | static void flush_timer_callback(unsigned long data) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 402 | { |
| 403 | struct fw_card *card = (struct fw_card *)data; |
| 404 | |
| 405 | fw_flush_transactions(card); |
| 406 | } |
| 407 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 408 | void fw_card_initialize(struct fw_card *card, |
| 409 | const struct fw_card_driver *driver, |
| 410 | struct device *device) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 411 | { |
Kristian Høgsberg | bbf19db | 2007-02-06 14:49:38 -0500 | [diff] [blame] | 412 | static atomic_t index = ATOMIC_INIT(-1); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 413 | |
Kristian Høgsberg | bbf19db | 2007-02-06 14:49:38 -0500 | [diff] [blame] | 414 | card->index = atomic_inc_return(&index); |
Stefan Richter | 5e20c28 | 2007-01-21 20:44:09 +0100 | [diff] [blame] | 415 | card->driver = driver; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 416 | card->device = device; |
Stefan Richter | 5e20c28 | 2007-01-21 20:44:09 +0100 | [diff] [blame] | 417 | card->current_tlabel = 0; |
| 418 | card->tlabel_mask = 0; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 419 | card->color = 0; |
Stefan Richter | e534fe1 | 2008-05-24 16:41:09 +0200 | [diff] [blame] | 420 | card->broadcast_channel = BROADCAST_CHANNEL_INITIAL; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 421 | |
Stefan Richter | 459f792 | 2008-05-24 16:50:22 +0200 | [diff] [blame] | 422 | kref_init(&card->kref); |
| 423 | init_completion(&card->done); |
Stefan Richter | 5e20c28 | 2007-01-21 20:44:09 +0100 | [diff] [blame] | 424 | INIT_LIST_HEAD(&card->transaction_list); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 425 | spin_lock_init(&card->lock); |
| 426 | setup_timer(&card->flush_timer, |
| 427 | flush_timer_callback, (unsigned long)card); |
| 428 | |
| 429 | card->local_node = NULL; |
| 430 | |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 431 | INIT_DELAYED_WORK(&card->work, fw_card_bm_work); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 432 | } |
| 433 | EXPORT_SYMBOL(fw_card_initialize); |
| 434 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 435 | int fw_card_add(struct fw_card *card, |
| 436 | u32 max_receive, u32 link_speed, u64 guid) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 437 | { |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 438 | u32 *config_rom; |
| 439 | size_t length; |
Stefan Richter | e1eff7a | 2009-02-03 17:55:19 +0100 | [diff] [blame] | 440 | int ret; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 441 | |
| 442 | card->max_receive = max_receive; |
| 443 | card->link_speed = link_speed; |
| 444 | card->guid = guid; |
| 445 | |
Kristian Høgsberg | 6a5033b | 2007-05-07 20:33:33 -0400 | [diff] [blame] | 446 | mutex_lock(&card_mutex); |
Kristian Høgsberg | a98e271 | 2007-05-07 20:33:34 -0400 | [diff] [blame] | 447 | config_rom = generate_config_rom(card, &length); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 448 | list_add_tail(&card->link, &card_list); |
Kristian Høgsberg | 6a5033b | 2007-05-07 20:33:33 -0400 | [diff] [blame] | 449 | mutex_unlock(&card_mutex); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 450 | |
Stefan Richter | e1eff7a | 2009-02-03 17:55:19 +0100 | [diff] [blame] | 451 | ret = card->driver->enable(card, config_rom, length); |
| 452 | if (ret < 0) { |
Petr Vandrovec | b7479fe | 2009-02-01 01:29:35 -0800 | [diff] [blame] | 453 | mutex_lock(&card_mutex); |
| 454 | list_del(&card->link); |
| 455 | mutex_unlock(&card_mutex); |
| 456 | } |
Stefan Richter | e1eff7a | 2009-02-03 17:55:19 +0100 | [diff] [blame] | 457 | |
| 458 | return ret; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 459 | } |
| 460 | EXPORT_SYMBOL(fw_card_add); |
| 461 | |
| 462 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 463 | /* |
Stefan Richter | d645f4d | 2009-06-16 19:15:25 +0200 | [diff] [blame] | 464 | * The next few functions implement a dummy driver that is used once a card |
| 465 | * driver shuts down an fw_card. This allows the driver to cleanly unload, |
| 466 | * as all IO to the card will be handled (and failed) by the dummy driver |
| 467 | * instead of calling into the module. Only functions for iso context |
| 468 | * shutdown still need to be provided by the card driver. |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 469 | */ |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 470 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 471 | static int dummy_enable(struct fw_card *card, u32 *config_rom, size_t length) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 472 | { |
| 473 | BUG(); |
| 474 | return -1; |
| 475 | } |
| 476 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 477 | static int dummy_update_phy_reg(struct fw_card *card, int address, |
| 478 | int clear_bits, int set_bits) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 479 | { |
| 480 | return -ENODEV; |
| 481 | } |
| 482 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 483 | static int dummy_set_config_rom(struct fw_card *card, |
| 484 | u32 *config_rom, size_t length) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 485 | { |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 486 | /* |
| 487 | * We take the card out of card_list before setting the dummy |
| 488 | * driver, so this should never get called. |
| 489 | */ |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 490 | BUG(); |
| 491 | return -1; |
| 492 | } |
| 493 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 494 | static void dummy_send_request(struct fw_card *card, struct fw_packet *packet) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 495 | { |
Stefan Richter | 5e20c28 | 2007-01-21 20:44:09 +0100 | [diff] [blame] | 496 | packet->callback(packet, card, -ENODEV); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 497 | } |
| 498 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 499 | static void dummy_send_response(struct fw_card *card, struct fw_packet *packet) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 500 | { |
Stefan Richter | 5e20c28 | 2007-01-21 20:44:09 +0100 | [diff] [blame] | 501 | packet->callback(packet, card, -ENODEV); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 502 | } |
| 503 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 504 | static int dummy_cancel_packet(struct fw_card *card, struct fw_packet *packet) |
Kristian Høgsberg | 730c32f | 2007-02-06 14:49:32 -0500 | [diff] [blame] | 505 | { |
| 506 | return -ENOENT; |
| 507 | } |
| 508 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 509 | static int dummy_enable_phys_dma(struct fw_card *card, |
| 510 | int node_id, int generation) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 511 | { |
| 512 | return -ENODEV; |
| 513 | } |
| 514 | |
Stefan Richter | d645f4d | 2009-06-16 19:15:25 +0200 | [diff] [blame] | 515 | static const struct fw_card_driver dummy_driver_template = { |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 516 | .enable = dummy_enable, |
| 517 | .update_phy_reg = dummy_update_phy_reg, |
| 518 | .set_config_rom = dummy_set_config_rom, |
Stefan Richter | 5e20c28 | 2007-01-21 20:44:09 +0100 | [diff] [blame] | 519 | .send_request = dummy_send_request, |
Kristian Høgsberg | 730c32f | 2007-02-06 14:49:32 -0500 | [diff] [blame] | 520 | .cancel_packet = dummy_cancel_packet, |
Stefan Richter | 5e20c28 | 2007-01-21 20:44:09 +0100 | [diff] [blame] | 521 | .send_response = dummy_send_response, |
Stefan Richter | 5af4e5e | 2007-01-21 20:45:32 +0100 | [diff] [blame] | 522 | .enable_phys_dma = dummy_enable_phys_dma, |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 523 | }; |
| 524 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 525 | void fw_card_release(struct kref *kref) |
Stefan Richter | 459f792 | 2008-05-24 16:50:22 +0200 | [diff] [blame] | 526 | { |
| 527 | struct fw_card *card = container_of(kref, struct fw_card, kref); |
| 528 | |
| 529 | complete(&card->done); |
| 530 | } |
| 531 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 532 | void fw_core_remove_card(struct fw_card *card) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 533 | { |
Stefan Richter | d645f4d | 2009-06-16 19:15:25 +0200 | [diff] [blame] | 534 | struct fw_card_driver dummy_driver = dummy_driver_template; |
| 535 | |
Marc Butler | ecab413 | 2007-03-23 10:24:02 -0600 | [diff] [blame] | 536 | card->driver->update_phy_reg(card, 4, |
| 537 | PHY_LINK_ACTIVE | PHY_CONTENDER, 0); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 538 | fw_core_initiate_bus_reset(card, 1); |
| 539 | |
Kristian Høgsberg | 6a5033b | 2007-05-07 20:33:33 -0400 | [diff] [blame] | 540 | mutex_lock(&card_mutex); |
Stefan Richter | e747a5c | 2009-01-24 20:35:38 +0100 | [diff] [blame] | 541 | list_del_init(&card->link); |
Kristian Høgsberg | 6a5033b | 2007-05-07 20:33:33 -0400 | [diff] [blame] | 542 | mutex_unlock(&card_mutex); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 543 | |
Stefan Richter | d645f4d | 2009-06-16 19:15:25 +0200 | [diff] [blame] | 544 | /* Switch off most of the card driver interface. */ |
| 545 | dummy_driver.free_iso_context = card->driver->free_iso_context; |
| 546 | dummy_driver.stop_iso = card->driver->stop_iso; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 547 | card->driver = &dummy_driver; |
| 548 | |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 549 | fw_destroy_nodes(card); |
Stefan Richter | 459f792 | 2008-05-24 16:50:22 +0200 | [diff] [blame] | 550 | |
| 551 | /* Wait for all users, especially device workqueue jobs, to finish. */ |
| 552 | fw_card_put(card); |
| 553 | wait_for_completion(&card->done); |
Stefan Richter | 8a2d9ed | 2007-08-21 01:05:14 +0200 | [diff] [blame] | 554 | |
Stefan Richter | 1e8afea | 2008-07-12 14:51:18 +0200 | [diff] [blame] | 555 | WARN_ON(!list_empty(&card->transaction_list)); |
Stefan Richter | 8a2d9ed | 2007-08-21 01:05:14 +0200 | [diff] [blame] | 556 | del_timer_sync(&card->flush_timer); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 557 | } |
| 558 | EXPORT_SYMBOL(fw_core_remove_card); |
| 559 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 560 | int fw_core_initiate_bus_reset(struct fw_card *card, int short_reset) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 561 | { |
Marc Butler | ecab413 | 2007-03-23 10:24:02 -0600 | [diff] [blame] | 562 | int reg = short_reset ? 5 : 1; |
Marc Butler | ecab413 | 2007-03-23 10:24:02 -0600 | [diff] [blame] | 563 | int bit = short_reset ? PHY_BUS_SHORT_RESET : PHY_BUS_RESET; |
| 564 | |
| 565 | return card->driver->update_phy_reg(card, reg, 0, bit); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 566 | } |
| 567 | EXPORT_SYMBOL(fw_core_initiate_bus_reset); |