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path: root/drivers/firewire/fw-card.c
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Diffstat (limited to 'drivers/firewire/fw-card.c')
-rw-r--r--drivers/firewire/fw-card.c105
1 files changed, 66 insertions, 39 deletions
diff --git a/drivers/firewire/fw-card.c b/drivers/firewire/fw-card.c
index 216965615ee..b2aa85555a7 100644
--- a/drivers/firewire/fw-card.c
+++ b/drivers/firewire/fw-card.c
@@ -1,8 +1,5 @@
-/* -*- c-basic-offset: 8 -*-
- *
- * fw-card.c - card level functions
- *
- * Copyright (C) 2005-2006 Kristian Hoegsberg <krh@bitplanet.net>
+/*
+ * Copyright (C) 2005-2007 Kristian Hoegsberg <krh@bitplanet.net>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@@ -69,12 +66,14 @@ generate_config_rom (struct fw_card *card, size_t *config_rom_length)
static u32 config_rom[256];
int i, j, length;
- /* Initialize contents of config rom buffer. On the OHCI
+ /*
+ * Initialize contents of config rom buffer. On the OHCI
* controller, block reads to the config rom accesses the host
* memory, but quadlet read access the hardware bus info block
* registers. That's just crack, but it means we should make
* sure the contents of bus info block in host memory mathces
- * the version stored in the OHCI registers. */
+ * the version stored in the OHCI registers.
+ */
memset(config_rom, 0, sizeof config_rom);
config_rom[0] = bib_crc_length(4) | bib_info_length(4) | bib_crc(0);
@@ -143,9 +142,11 @@ fw_core_add_descriptor (struct fw_descriptor *desc)
{
size_t i;
- /* Check descriptor is valid; the length of all blocks in the
+ /*
+ * Check descriptor is valid; the length of all blocks in the
* descriptor has to add up to exactly the length of the
- * block. */
+ * block.
+ */
i = 0;
while (i < desc->length)
i += (desc->data[i] >> 16) + 1;
@@ -228,7 +229,8 @@ fw_card_bm_work(struct work_struct *work)
if (card->bm_generation + 1 == generation ||
(card->bm_generation != generation && grace)) {
- /* This first step is to figure out who is IRM and
+ /*
+ * This first step is to figure out who is IRM and
* then try to become bus manager. If the IRM is not
* well defined (e.g. does not have an active link
* layer or does not responds to our lock request, we
@@ -236,7 +238,8 @@ fw_card_bm_work(struct work_struct *work)
* In that case, we do a goto into the gap count logic
* so that when we do the reset, we still optimize the
* gap count. That could well save a reset in the
- * next generation. */
+ * next generation.
+ */
irm_id = card->irm_node->node_id;
if (!card->irm_node->link_on) {
@@ -260,8 +263,10 @@ fw_card_bm_work(struct work_struct *work)
wait_for_completion(&bmd.done);
if (bmd.rcode == RCODE_GENERATION) {
- /* Another bus reset happened. Just return,
- * the BM work has been rescheduled. */
+ /*
+ * Another bus reset happened. Just return,
+ * the BM work has been rescheduled.
+ */
return;
}
@@ -271,48 +276,62 @@ fw_card_bm_work(struct work_struct *work)
spin_lock_irqsave(&card->lock, flags);
if (bmd.rcode != RCODE_COMPLETE) {
- /* The lock request failed, maybe the IRM
+ /*
+ * The lock request failed, maybe the IRM
* isn't really IRM capable after all. Let's
* do a bus reset and pick the local node as
- * root, and thus, IRM. */
+ * root, and thus, IRM.
+ */
new_root_id = card->local_node->node_id;
fw_notify("BM lock failed, making local node (%02x) root.\n",
new_root_id);
goto pick_me;
}
} else if (card->bm_generation != generation) {
- /* OK, we weren't BM in the last generation, and it's
+ /*
+ * OK, we weren't BM in the last generation, and it's
* less than 100ms since last bus reset. Reschedule
- * this task 100ms from now. */
+ * this task 100ms from now.
+ */
spin_unlock_irqrestore(&card->lock, flags);
schedule_delayed_work(&card->work, DIV_ROUND_UP(HZ, 10));
return;
}
- /* We're bus manager for this generation, so next step is to
+ /*
+ * We're bus manager for this generation, so next step is to
* make sure we have an active cycle master and do gap count
- * optimization. */
+ * optimization.
+ */
card->bm_generation = generation;
if (root == NULL) {
- /* Either link_on is false, or we failed to read the
- * config rom. In either case, pick another root. */
+ /*
+ * Either link_on is false, or we failed to read the
+ * config rom. In either case, pick another root.
+ */
new_root_id = card->local_node->node_id;
} else if (atomic_read(&root->state) != FW_DEVICE_RUNNING) {
- /* If we haven't probed this device yet, bail out now
- * and let's try again once that's done. */
+ /*
+ * If we haven't probed this device yet, bail out now
+ * and let's try again once that's done.
+ */
spin_unlock_irqrestore(&card->lock, flags);
return;
} else if (root->config_rom[2] & bib_cmc) {
- /* FIXME: I suppose we should set the cmstr bit in the
+ /*
+ * FIXME: I suppose we should set the cmstr bit in the
* STATE_CLEAR register of this node, as described in
* 1394-1995, 8.4.2.6. Also, send out a force root
- * packet for this node. */
+ * packet for this node.
+ */
new_root_id = root_id;
} else {
- /* Current root has an active link layer and we
+ /*
+ * Current root has an active link layer and we
* successfully read the config rom, but it's not
- * cycle master capable. */
+ * cycle master capable.
+ */
new_root_id = card->local_node->node_id;
}
@@ -324,9 +343,11 @@ fw_card_bm_work(struct work_struct *work)
else
gap_count = 63;
- /* Finally, figure out if we should do a reset or not. If we've
+ /*
+ * Finally, figure out if we should do a reset or not. If we've
* done less that 5 resets with the same physical topology and we
- * have either a new root or a new gap count setting, let's do it. */
+ * have either a new root or a new gap count setting, let's do it.
+ */
if (card->bm_retries++ < 5 &&
(card->gap_count != gap_count || new_root_id != root_id))
@@ -391,8 +412,10 @@ fw_card_add(struct fw_card *card,
PHY_LINK_ACTIVE | PHY_CONTENDER) < 0)
return -EIO;
- /* The subsystem grabs a reference when the card is added and
- * drops it when the driver calls fw_core_remove_card. */
+ /*
+ * The subsystem grabs a reference when the card is added and
+ * drops it when the driver calls fw_core_remove_card.
+ */
fw_card_get(card);
down_write(&card_rwsem);
@@ -405,11 +428,13 @@ fw_card_add(struct fw_card *card,
EXPORT_SYMBOL(fw_card_add);
-/* The next few functions implements a dummy driver that use once a
+/*
+ * The next few functions implements a dummy driver that use once a
* card driver shuts down an fw_card. This allows the driver to
* cleanly unload, as all IO to the card will be handled by the dummy
* driver instead of calling into the (possibly) unloaded module. The
- * dummy driver just fails all IO. */
+ * dummy driver just fails all IO.
+ */
static int
dummy_enable(struct fw_card *card, u32 *config_rom, size_t length)
@@ -429,8 +454,10 @@ static int
dummy_set_config_rom(struct fw_card *card,
u32 *config_rom, size_t length)
{
- /* We take the card out of card_list before setting the dummy
- * driver, so this should never get called. */
+ /*
+ * We take the card out of card_list before setting the dummy
+ * driver, so this should never get called.
+ */
BUG();
return -1;
}
@@ -510,9 +537,11 @@ release_card(struct kref *kref)
kfree(card);
}
-/* An assumption for fw_card_put() is that the card driver allocates
+/*
+ * An assumption for fw_card_put() is that the card driver allocates
* the fw_card struct with kalloc and that it has been shut down
- * before the last ref is dropped. */
+ * before the last ref is dropped.
+ */
void
fw_card_put(struct fw_card *card)
{
@@ -524,8 +553,6 @@ int
fw_core_initiate_bus_reset(struct fw_card *card, int short_reset)
{
int reg = short_reset ? 5 : 1;
- /* The following values happen to be the same bit. However be
- * explicit for clarity. */
int bit = short_reset ? PHY_BUS_SHORT_RESET : PHY_BUS_RESET;
return card->driver->update_phy_reg(card, reg, 0, bit);