diff options
Diffstat (limited to 'drivers/firewire')
| -rw-r--r-- | drivers/firewire/core-card.c | 68 | ||||
| -rw-r--r-- | drivers/firewire/core-cdev.c | 3 | ||||
| -rw-r--r-- | drivers/firewire/core-transaction.c | 18 | ||||
| -rw-r--r-- | drivers/firewire/core.h | 6 | ||||
| -rw-r--r-- | drivers/firewire/ohci.c | 53 |
5 files changed, 112 insertions, 36 deletions
diff --git a/drivers/firewire/core-card.c b/drivers/firewire/core-card.c index 6c316cfe70c..2bb5c036e80 100644 --- a/drivers/firewire/core-card.c +++ b/drivers/firewire/core-card.c @@ -204,6 +204,45 @@ void fw_core_remove_descriptor(struct fw_descriptor *desc) } EXPORT_SYMBOL(fw_core_remove_descriptor); +static int reset_bus(struct fw_card *card, bool short_reset) +{ + int reg = short_reset ? 5 : 1; + int bit = short_reset ? PHY_BUS_SHORT_RESET : PHY_BUS_RESET; + + return card->driver->update_phy_reg(card, reg, 0, bit); +} + +void fw_schedule_bus_reset(struct fw_card *card, bool delayed, bool short_reset) +{ + /* We don't try hard to sort out requests of long vs. short resets. */ + card->br_short = short_reset; + + /* Use an arbitrary short delay to combine multiple reset requests. */ + fw_card_get(card); + if (!schedule_delayed_work(&card->br_work, + delayed ? DIV_ROUND_UP(HZ, 100) : 0)) + fw_card_put(card); +} +EXPORT_SYMBOL(fw_schedule_bus_reset); + +static void br_work(struct work_struct *work) +{ + struct fw_card *card = container_of(work, struct fw_card, br_work.work); + + /* Delay for 2s after last reset per IEEE 1394 clause 8.2.1. */ + if (card->reset_jiffies != 0 && + time_is_after_jiffies(card->reset_jiffies + 2 * HZ)) { + if (!schedule_delayed_work(&card->br_work, 2 * HZ)) + fw_card_put(card); + return; + } + + fw_send_phy_config(card, FW_PHY_CONFIG_NO_NODE_ID, card->generation, + FW_PHY_CONFIG_CURRENT_GAP_COUNT); + reset_bus(card, card->br_short); + fw_card_put(card); +} + static void allocate_broadcast_channel(struct fw_card *card, int generation) { int channel, bandwidth = 0; @@ -230,13 +269,13 @@ static const char gap_count_table[] = { void fw_schedule_bm_work(struct fw_card *card, unsigned long delay) { fw_card_get(card); - if (!schedule_delayed_work(&card->work, delay)) + if (!schedule_delayed_work(&card->bm_work, delay)) fw_card_put(card); } -static void fw_card_bm_work(struct work_struct *work) +static void bm_work(struct work_struct *work) { - struct fw_card *card = container_of(work, struct fw_card, work.work); + struct fw_card *card = container_of(work, struct fw_card, bm_work.work); struct fw_device *root_device; struct fw_node *root_node; int root_id, new_root_id, irm_id, bm_id, local_id; @@ -413,7 +452,7 @@ static void fw_card_bm_work(struct work_struct *work) fw_notify("phy config: card %d, new root=%x, gap_count=%d\n", card->index, new_root_id, gap_count); fw_send_phy_config(card, new_root_id, generation, gap_count); - fw_core_initiate_bus_reset(card, 1); + reset_bus(card, true); /* Will allocate broadcast channel after the reset. */ goto out; } @@ -465,7 +504,8 @@ void fw_card_initialize(struct fw_card *card, card->local_node = NULL; - INIT_DELAYED_WORK(&card->work, fw_card_bm_work); + INIT_DELAYED_WORK(&card->br_work, br_work); + INIT_DELAYED_WORK(&card->bm_work, bm_work); } EXPORT_SYMBOL(fw_card_initialize); @@ -491,7 +531,6 @@ int fw_card_add(struct fw_card *card, } EXPORT_SYMBOL(fw_card_add); - /* * The next few functions implement a dummy driver that is used once a card * driver shuts down an fw_card. This allows the driver to cleanly unload, @@ -507,6 +546,11 @@ static int dummy_enable(struct fw_card *card, return -1; } +static int dummy_read_phy_reg(struct fw_card *card, int address) +{ + return -ENODEV; +} + static int dummy_update_phy_reg(struct fw_card *card, int address, int clear_bits, int set_bits) { @@ -547,6 +591,7 @@ static int dummy_enable_phys_dma(struct fw_card *card, static const struct fw_card_driver dummy_driver_template = { .enable = dummy_enable, + .read_phy_reg = dummy_read_phy_reg, .update_phy_reg = dummy_update_phy_reg, .set_config_rom = dummy_set_config_rom, .send_request = dummy_send_request, @@ -568,7 +613,7 @@ void fw_core_remove_card(struct fw_card *card) card->driver->update_phy_reg(card, 4, PHY_LINK_ACTIVE | PHY_CONTENDER, 0); - fw_core_initiate_bus_reset(card, 1); + fw_schedule_bus_reset(card, false, true); mutex_lock(&card_mutex); list_del_init(&card->link); @@ -588,12 +633,3 @@ void fw_core_remove_card(struct fw_card *card) WARN_ON(!list_empty(&card->transaction_list)); } EXPORT_SYMBOL(fw_core_remove_card); - -int fw_core_initiate_bus_reset(struct fw_card *card, int short_reset) -{ - int reg = short_reset ? 5 : 1; - int bit = short_reset ? PHY_BUS_SHORT_RESET : PHY_BUS_RESET; - - return card->driver->update_phy_reg(card, reg, 0, bit); -} -EXPORT_SYMBOL(fw_core_initiate_bus_reset); diff --git a/drivers/firewire/core-cdev.c b/drivers/firewire/core-cdev.c index 7a690c466ce..ee2e8735310 100644 --- a/drivers/firewire/core-cdev.c +++ b/drivers/firewire/core-cdev.c @@ -820,8 +820,9 @@ static int ioctl_send_response(struct client *client, union ioctl_arg *arg) static int ioctl_initiate_bus_reset(struct client *client, union ioctl_arg *arg) { - return fw_core_initiate_bus_reset(client->device->card, + fw_schedule_bus_reset(client->device->card, true, arg->initiate_bus_reset.type == FW_CDEV_SHORT_RESET); + return 0; } static void release_descriptor(struct client *client, diff --git a/drivers/firewire/core-transaction.c b/drivers/firewire/core-transaction.c index 7813da8a129..5f5a7852f7a 100644 --- a/drivers/firewire/core-transaction.c +++ b/drivers/firewire/core-transaction.c @@ -426,9 +426,21 @@ void fw_send_phy_config(struct fw_card *card, int node_id, int generation, int gap_count) { long timeout = DIV_ROUND_UP(HZ, 10); - u32 data = PHY_IDENTIFIER(PHY_PACKET_CONFIG) | - PHY_CONFIG_ROOT_ID(node_id) | - PHY_CONFIG_GAP_COUNT(gap_count); + u32 data = PHY_IDENTIFIER(PHY_PACKET_CONFIG); + + if (node_id != FW_PHY_CONFIG_NO_NODE_ID) + data |= PHY_CONFIG_ROOT_ID(node_id); + + if (gap_count == FW_PHY_CONFIG_CURRENT_GAP_COUNT) { + gap_count = card->driver->read_phy_reg(card, 1); + if (gap_count < 0) + return; + + gap_count &= 63; + if (gap_count == 63) + return; + } + data |= PHY_CONFIG_GAP_COUNT(gap_count); mutex_lock(&phy_config_mutex); diff --git a/drivers/firewire/core.h b/drivers/firewire/core.h index 3000dd74acf..ff6c9092200 100644 --- a/drivers/firewire/core.h +++ b/drivers/firewire/core.h @@ -51,6 +51,7 @@ struct fw_card_driver { int (*enable)(struct fw_card *card, const __be32 *config_rom, size_t length); + int (*read_phy_reg)(struct fw_card *card, int address); int (*update_phy_reg)(struct fw_card *card, int address, int clear_bits, int set_bits); @@ -102,8 +103,8 @@ void fw_card_initialize(struct fw_card *card, int fw_card_add(struct fw_card *card, u32 max_receive, u32 link_speed, u64 guid); void fw_core_remove_card(struct fw_card *card); -int fw_core_initiate_bus_reset(struct fw_card *card, int short_reset); int fw_compute_block_crc(__be32 *block); +void fw_schedule_bus_reset(struct fw_card *card, bool delayed, bool short_reset); void fw_schedule_bm_work(struct fw_card *card, unsigned long delay); static inline struct fw_card *fw_card_get(struct fw_card *card) @@ -225,6 +226,9 @@ void fw_core_handle_response(struct fw_card *card, struct fw_packet *packet); int fw_get_response_length(struct fw_request *request); void fw_fill_response(struct fw_packet *response, u32 *request_header, int rcode, void *payload, size_t length); + +#define FW_PHY_CONFIG_NO_NODE_ID -1 +#define FW_PHY_CONFIG_CURRENT_GAP_COUNT -1 void fw_send_phy_config(struct fw_card *card, int node_id, int generation, int gap_count); diff --git a/drivers/firewire/ohci.c b/drivers/firewire/ohci.c index a4bbf3dadf5..bb6a92bc9e6 100644 --- a/drivers/firewire/ohci.c +++ b/drivers/firewire/ohci.c @@ -34,6 +34,7 @@ #include <linux/mm.h> #include <linux/module.h> #include <linux/moduleparam.h> +#include <linux/mutex.h> #include <linux/pci.h> #include <linux/pci_ids.h> #include <linux/spinlock.h> @@ -182,6 +183,8 @@ struct fw_ohci { */ spinlock_t lock; + struct mutex phy_reg_mutex; + struct ar_context ar_request_ctx; struct ar_context ar_response_ctx; struct context at_request_ctx; @@ -517,13 +520,10 @@ static int write_phy_reg(const struct fw_ohci *ohci, int addr, u32 val) return -EBUSY; } -static int ohci_update_phy_reg(struct fw_card *card, int addr, - int clear_bits, int set_bits) +static int update_phy_reg(struct fw_ohci *ohci, int addr, + int clear_bits, int set_bits) { - struct fw_ohci *ohci = fw_ohci(card); - int ret; - - ret = read_phy_reg(ohci, addr); + int ret = read_phy_reg(ohci, addr); if (ret < 0) return ret; @@ -541,13 +541,38 @@ static int read_paged_phy_reg(struct fw_ohci *ohci, int page, int addr) { int ret; - ret = ohci_update_phy_reg(&ohci->card, 7, PHY_PAGE_SELECT, page << 5); + ret = update_phy_reg(ohci, 7, PHY_PAGE_SELECT, page << 5); if (ret < 0) return ret; return read_phy_reg(ohci, addr); } +static int ohci_read_phy_reg(struct fw_card *card, int addr) +{ + struct fw_ohci *ohci = fw_ohci(card); + int ret; + + mutex_lock(&ohci->phy_reg_mutex); + ret = read_phy_reg(ohci, addr); + mutex_unlock(&ohci->phy_reg_mutex); + + return ret; +} + +static int ohci_update_phy_reg(struct fw_card *card, int addr, + int clear_bits, int set_bits) +{ + struct fw_ohci *ohci = fw_ohci(card); + int ret; + + mutex_lock(&ohci->phy_reg_mutex); + ret = update_phy_reg(ohci, addr, clear_bits, set_bits); + mutex_unlock(&ohci->phy_reg_mutex); + + return ret; +} + static int ar_context_add_page(struct ar_context *ctx) { struct device *dev = ctx->ohci->card.device; @@ -1676,7 +1701,7 @@ static int configure_1394a_enhancements(struct fw_ohci *ohci) clear = PHY_ENABLE_ACCEL | PHY_ENABLE_MULTI; set = 0; } - ret = ohci_update_phy_reg(&ohci->card, 5, clear, set); + ret = update_phy_reg(ohci, 5, clear, set); if (ret < 0) return ret; @@ -1856,12 +1881,8 @@ static int ohci_enable(struct fw_card *card, OHCI1394_HCControl_BIBimageValid); flush_writes(ohci); - /* - * We are ready to go, initiate bus reset to finish the - * initialization. - */ - - fw_core_initiate_bus_reset(&ohci->card, 1); + /* We are ready to go, reset bus to finish initialization. */ + fw_schedule_bus_reset(&ohci->card, false, true); return 0; } @@ -1936,7 +1957,7 @@ static int ohci_set_config_rom(struct fw_card *card, * takes effect. */ if (ret == 0) - fw_core_initiate_bus_reset(&ohci->card, 1); + fw_schedule_bus_reset(&ohci->card, true, true); else dma_free_coherent(ohci->card.device, CONFIG_ROM_SIZE, next_config_rom, next_config_rom_bus); @@ -2570,6 +2591,7 @@ static int ohci_queue_iso(struct fw_iso_context *base, static const struct fw_card_driver ohci_driver = { .enable = ohci_enable, + .read_phy_reg = ohci_read_phy_reg, .update_phy_reg = ohci_update_phy_reg, .set_config_rom = ohci_set_config_rom, .send_request = ohci_send_request, @@ -2645,6 +2667,7 @@ static int __devinit pci_probe(struct pci_dev *dev, pci_set_drvdata(dev, ohci); spin_lock_init(&ohci->lock); + mutex_init(&ohci->phy_reg_mutex); tasklet_init(&ohci->bus_reset_tasklet, bus_reset_tasklet, (unsigned long)ohci); |