#include <linux/spinlock.h>
#include <linux/string.h>
-#include <asm/atomic.h>
#include <asm/byteorder.h>
#include <asm/page.h>
#include <asm/system.h>
__le16 transfer_status;
} __attribute__((aligned(16)));
-struct db_descriptor {
- __le16 first_size;
- __le16 control;
- __le16 second_req_count;
- __le16 first_req_count;
- __le32 branch_address;
- __le16 second_res_count;
- __le16 first_res_count;
- __le32 reserved0;
- __le32 first_buffer;
- __le32 second_buffer;
- __le32 reserved1;
-} __attribute__((aligned(16)));
-
#define CONTROL_SET(regs) (regs)
#define CONTROL_CLEAR(regs) ((regs) + 4)
#define COMMAND_PTR(regs) ((regs) + 12)
struct fw_card card;
__iomem char *registers;
- dma_addr_t self_id_bus;
- __le32 *self_id_cpu;
- struct tasklet_struct bus_reset_tasklet;
int node_id;
int generation;
int request_generation; /* for timestamping incoming requests */
- atomic_t bus_seconds;
-
- bool use_dualbuffer;
- bool old_uninorth;
- bool bus_reset_packet_quirk;
- bool iso_cycle_timer_quirk;
+ unsigned quirks;
/*
* Spinlock for accessing fw_ohci data. Never call out of
* this driver with this lock held.
*/
spinlock_t lock;
- u32 self_id_buffer[512];
-
- /* Config rom buffers */
- __be32 *config_rom;
- dma_addr_t config_rom_bus;
- __be32 *next_config_rom;
- dma_addr_t next_config_rom_bus;
- __be32 next_header;
struct ar_context ar_request_ctx;
struct ar_context ar_response_ctx;
u64 ir_context_channels;
u32 ir_context_mask;
struct iso_context *ir_context_list;
+
+ __be32 *config_rom;
+ dma_addr_t config_rom_bus;
+ __be32 *next_config_rom;
+ dma_addr_t next_config_rom_bus;
+ __be32 next_header;
+
+ __le32 *self_id_cpu;
+ dma_addr_t self_id_bus;
+ struct tasklet_struct bus_reset_tasklet;
+
+ u32 self_id_buffer[512];
};
static inline struct fw_ohci *fw_ohci(struct fw_card *card)
static char ohci_driver_name[] = KBUILD_MODNAME;
+#define PCI_DEVICE_ID_TI_TSB12LV22 0x8009
+
+#define QUIRK_CYCLE_TIMER 1
+#define QUIRK_RESET_PACKET 2
+#define QUIRK_BE_HEADERS 4
+
+/* In case of multiple matches in ohci_quirks[], only the first one is used. */
+static const struct {
+ unsigned short vendor, device, flags;
+} ohci_quirks[] = {
+ {PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_TSB12LV22, QUIRK_CYCLE_TIMER |
+ QUIRK_RESET_PACKET},
+ {PCI_VENDOR_ID_TI, PCI_ANY_ID, QUIRK_RESET_PACKET},
+ {PCI_VENDOR_ID_AL, PCI_ANY_ID, QUIRK_CYCLE_TIMER},
+ {PCI_VENDOR_ID_NEC, PCI_ANY_ID, QUIRK_CYCLE_TIMER},
+ {PCI_VENDOR_ID_VIA, PCI_ANY_ID, QUIRK_CYCLE_TIMER},
+ {PCI_VENDOR_ID_APPLE, PCI_DEVICE_ID_APPLE_UNI_N_FW, QUIRK_BE_HEADERS},
+};
+
+/* This overrides anything that was found in ohci_quirks[]. */
+static int param_quirks;
+module_param_named(quirks, param_quirks, int, 0644);
+MODULE_PARM_DESC(quirks, "Chip quirks (default = 0"
+ ", nonatomic cycle timer = " __stringify(QUIRK_CYCLE_TIMER)
+ ", reset packet generation = " __stringify(QUIRK_RESET_PACKET)
+ ", AR/selfID endianess = " __stringify(QUIRK_BE_HEADERS)
+ ")");
+
#ifdef CONFIG_FIREWIRE_OHCI_DEBUG
#define OHCI_PARAM_DEBUG_AT_AR 1
!(evt & OHCI1394_busReset))
return;
- fw_notify("IRQ %08x%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n", evt,
+ fw_notify("IRQ %08x%s%s%s%s%s%s%s%s%s%s%s%s%s\n", evt,
evt & OHCI1394_selfIDComplete ? " selfID" : "",
evt & OHCI1394_RQPkt ? " AR_req" : "",
evt & OHCI1394_RSPkt ? " AR_resp" : "",
evt & OHCI1394_isochTx ? " IT" : "",
evt & OHCI1394_postedWriteErr ? " postedWriteErr" : "",
evt & OHCI1394_cycleTooLong ? " cycleTooLong" : "",
- evt & OHCI1394_cycle64Seconds ? " cycle64Seconds" : "",
evt & OHCI1394_cycleInconsistent ? " cycleInconsistent" : "",
evt & OHCI1394_regAccessFail ? " regAccessFail" : "",
evt & OHCI1394_busReset ? " busReset" : "",
OHCI1394_RSPkt | OHCI1394_reqTxComplete |
OHCI1394_respTxComplete | OHCI1394_isochRx |
OHCI1394_isochTx | OHCI1394_postedWriteErr |
- OHCI1394_cycleTooLong | OHCI1394_cycle64Seconds |
- OHCI1394_cycleInconsistent |
+ OHCI1394_cycleTooLong | OHCI1394_cycleInconsistent |
OHCI1394_regAccessFail | OHCI1394_busReset)
? " ?" : "");
}
#if defined(CONFIG_PPC_PMAC) && defined(CONFIG_PPC32)
#define cond_le32_to_cpu(v) \
- (ohci->old_uninorth ? (__force __u32)(v) : le32_to_cpu(v))
+ (ohci->quirks & QUIRK_BE_HEADERS ? (__force __u32)(v) : le32_to_cpu(v))
#else
#define cond_le32_to_cpu(v) le32_to_cpu(v)
#endif
* at a slightly incorrect time (in bus_reset_tasklet).
*/
if (evt == OHCI1394_evt_bus_reset) {
- if (!ohci->bus_reset_packet_quirk)
+ if (!(ohci->quirks & QUIRK_RESET_PACKET))
ohci->request_generation = (p.header[2] >> 16) & 0xff;
} else if (ctx == &ohci->ar_request_ctx) {
fw_core_handle_request(&ohci->card, &p);
context_stop(&ohci->at_response_ctx);
reg_write(ohci, OHCI1394_IntEventClear, OHCI1394_busReset);
- if (ohci->bus_reset_packet_quirk)
+ if (ohci->quirks & QUIRK_RESET_PACKET)
ohci->request_generation = generation;
/*
static irqreturn_t irq_handler(int irq, void *data)
{
struct fw_ohci *ohci = data;
- u32 event, iso_event, cycle_time;
+ u32 event, iso_event;
int i;
event = reg_read(ohci, OHCI1394_IntEventClear);
fw_notify("isochronous cycle inconsistent\n");
}
- if (event & OHCI1394_cycle64Seconds) {
- cycle_time = reg_read(ohci, OHCI1394_IsochronousCycleTimer);
- if ((cycle_time & 0x80000000) == 0)
- atomic_inc(&ohci->bus_seconds);
- }
-
return IRQ_HANDLED;
}
OHCI1394_reqTxComplete | OHCI1394_respTxComplete |
OHCI1394_isochRx | OHCI1394_isochTx |
OHCI1394_postedWriteErr | OHCI1394_cycleTooLong |
- OHCI1394_cycleInconsistent |
- OHCI1394_cycle64Seconds | OHCI1394_regAccessFail |
+ OHCI1394_cycleInconsistent | OHCI1394_regAccessFail |
OHCI1394_masterIntEnable);
if (param_debug & OHCI_PARAM_DEBUG_BUSRESETS)
reg_write(ohci, OHCI1394_IntMaskSet, OHCI1394_busReset);
#endif /* CONFIG_FIREWIRE_OHCI_REMOTE_DMA */
}
-static inline u32 cycle_timer_ticks(u32 cycle_timer)
+static u32 cycle_timer_ticks(u32 cycle_timer)
{
u32 ticks;
ticks = cycle_timer & 0xfff;
ticks += 3072 * ((cycle_timer >> 12) & 0x1fff);
ticks += (3072 * 8000) * (cycle_timer >> 25);
+
return ticks;
}
-static u64 ohci_get_bus_time(struct fw_card *card)
+/*
+ * Some controllers exhibit one or more of the following bugs when updating the
+ * iso cycle timer register:
+ * - When the lowest six bits are wrapping around to zero, a read that happens
+ * at the same time will return garbage in the lowest ten bits.
+ * - When the cycleOffset field wraps around to zero, the cycleCount field is
+ * not incremented for about 60 ns.
+ * - Occasionally, the entire register reads zero.
+ *
+ * To catch these, we read the register three times and ensure that the
+ * difference between each two consecutive reads is approximately the same, i.e.
+ * less than twice the other. Furthermore, any negative difference indicates an
+ * error. (A PCI read should take at least 20 ticks of the 24.576 MHz timer to
+ * execute, so we have enough precision to compute the ratio of the differences.)
+ */
+static u32 ohci_get_cycle_time(struct fw_card *card)
{
struct fw_ohci *ohci = fw_ohci(card);
u32 c0, c1, c2;
u32 t0, t1, t2;
s32 diff01, diff12;
- u64 bus_time;
+ int i;
- if (!ohci->iso_cycle_timer_quirk) {
+ c2 = reg_read(ohci, OHCI1394_IsochronousCycleTimer);
+
+ if (ohci->quirks & QUIRK_CYCLE_TIMER) {
+ i = 0;
+ c1 = c2;
c2 = reg_read(ohci, OHCI1394_IsochronousCycleTimer);
- } else {
- /*
- * Some controllers exhibit one or more of the following bugs
- * when updating the iso cycle timer register:
- * - When the lowest six bits are wrapping around to zero,
- * a read that happens at the same time will return garbage
- * in the lowest ten bits.
- * - When the cycleOffset field wraps around to zero, the
- * cycleCount field is not incremented for about 60 ns.
- * - Occasionally, the entire register reads zero.
- *
- * To catch these, we read the register three times and ensure
- * that the difference between each two consecutive reads is
- * approximately the same, i.e., less than twice the other.
- * Furthermore, any negative difference indicates an error.
- * (A PCI read should take at least 20 ticks of the 24.576 MHz
- * timer to execute, so we have enough precision to compute the
- * ratio of the differences.)
- */
do {
- c0 = reg_read(ohci, OHCI1394_IsochronousCycleTimer);
- c1 = reg_read(ohci, OHCI1394_IsochronousCycleTimer);
+ c0 = c1;
+ c1 = c2;
c2 = reg_read(ohci, OHCI1394_IsochronousCycleTimer);
t0 = cycle_timer_ticks(c0);
t1 = cycle_timer_ticks(c1);
t2 = cycle_timer_ticks(c2);
diff01 = t1 - t0;
diff12 = t2 - t1;
- } while (diff01 <= 0 || diff12 <= 0 ||
- diff01 / diff12 >= 2 || diff12 / diff01 >= 2);
+ } while ((diff01 <= 0 || diff12 <= 0 ||
+ diff01 / diff12 >= 2 || diff12 / diff01 >= 2)
+ && i++ < 20);
}
- bus_time = ((u64)atomic_read(&ohci->bus_seconds) << 32) | c2;
- return bus_time;
+ return c2;
}
static void copy_iso_headers(struct iso_context *ctx, void *p)
ctx->header_length += ctx->base.header_size;
}
-static int handle_ir_dualbuffer_packet(struct context *context,
- struct descriptor *d,
- struct descriptor *last)
-{
- struct iso_context *ctx =
- container_of(context, struct iso_context, context);
- struct db_descriptor *db = (struct db_descriptor *) d;
- __le32 *ir_header;
- size_t header_length;
- void *p, *end;
-
- if (db->first_res_count != 0 && db->second_res_count != 0) {
- if (ctx->excess_bytes <= le16_to_cpu(db->second_req_count)) {
- /* This descriptor isn't done yet, stop iteration. */
- return 0;
- }
- ctx->excess_bytes -= le16_to_cpu(db->second_req_count);
- }
-
- header_length = le16_to_cpu(db->first_req_count) -
- le16_to_cpu(db->first_res_count);
-
- p = db + 1;
- end = p + header_length;
- while (p < end) {
- copy_iso_headers(ctx, p);
- ctx->excess_bytes +=
- (le32_to_cpu(*(__le32 *)(p + 4)) >> 16) & 0xffff;
- p += max(ctx->base.header_size, (size_t)8);
- }
-
- ctx->excess_bytes -= le16_to_cpu(db->second_req_count) -
- le16_to_cpu(db->second_res_count);
-
- if (le16_to_cpu(db->control) & DESCRIPTOR_IRQ_ALWAYS) {
- ir_header = (__le32 *) (db + 1);
- ctx->base.callback(&ctx->base,
- le32_to_cpu(ir_header[0]) & 0xffff,
- ctx->header_length, ctx->header,
- ctx->base.callback_data);
- ctx->header_length = 0;
- }
-
- return 1;
-}
-
static int handle_ir_packet_per_buffer(struct context *context,
struct descriptor *d,
struct descriptor *last)
channels = &ohci->ir_context_channels;
mask = &ohci->ir_context_mask;
list = ohci->ir_context_list;
- if (ohci->use_dualbuffer)
- callback = handle_ir_dualbuffer_packet;
- else
- callback = handle_ir_packet_per_buffer;
+ callback = handle_ir_packet_per_buffer;
}
spin_lock_irqsave(&ohci->lock, flags);
} else {
index = ctx - ohci->ir_context_list;
control = IR_CONTEXT_ISOCH_HEADER;
- if (ohci->use_dualbuffer)
- control |= IR_CONTEXT_DUAL_BUFFER_MODE;
match = (tags << 28) | (sync << 8) | ctx->base.channel;
if (cycle >= 0) {
match |= (cycle & 0x07fff) << 12;
u32 payload_index, payload_end_index, next_page_index;
int page, end_page, i, length, offset;
- /*
- * FIXME: Cycle lost behavior should be configurable: lose
- * packet, retransmit or terminate..
- */
-
p = packet;
payload_index = payload;
if (!p->skip) {
d[0].control = cpu_to_le16(DESCRIPTOR_KEY_IMMEDIATE);
d[0].req_count = cpu_to_le16(8);
+ /*
+ * Link the skip address to this descriptor itself. This causes
+ * a context to skip a cycle whenever lost cycles or FIFO
+ * overruns occur, without dropping the data. The application
+ * should then decide whether this is an error condition or not.
+ * FIXME: Make the context's cycle-lost behaviour configurable?
+ */
+ d[0].branch_address = cpu_to_le32(d_bus | z);
header = (__le32 *) &d[1];
header[0] = cpu_to_le32(IT_HEADER_SY(p->sy) |
return 0;
}
-static int ohci_queue_iso_receive_dualbuffer(struct fw_iso_context *base,
- struct fw_iso_packet *packet,
- struct fw_iso_buffer *buffer,
- unsigned long payload)
-{
- struct iso_context *ctx = container_of(base, struct iso_context, base);
- struct db_descriptor *db = NULL;
- struct descriptor *d;
- struct fw_iso_packet *p;
- dma_addr_t d_bus, page_bus;
- u32 z, header_z, length, rest;
- int page, offset, packet_count, header_size;
-
- /*
- * FIXME: Cycle lost behavior should be configurable: lose
- * packet, retransmit or terminate..
- */
-
- p = packet;
- z = 2;
-
- /*
- * The OHCI controller puts the isochronous header and trailer in the
- * buffer, so we need at least 8 bytes.
- */
- packet_count = p->header_length / ctx->base.header_size;
- header_size = packet_count * max(ctx->base.header_size, (size_t)8);
-
- /* Get header size in number of descriptors. */
- header_z = DIV_ROUND_UP(header_size, sizeof(*d));
- page = payload >> PAGE_SHIFT;
- offset = payload & ~PAGE_MASK;
- rest = p->payload_length;
- /*
- * The controllers I've tested have not worked correctly when
- * second_req_count is zero. Rather than do something we know won't
- * work, return an error
- */
- if (rest == 0)
- return -EINVAL;
-
- while (rest > 0) {
- d = context_get_descriptors(&ctx->context,
- z + header_z, &d_bus);
- if (d == NULL)
- return -ENOMEM;
-
- db = (struct db_descriptor *) d;
- db->control = cpu_to_le16(DESCRIPTOR_STATUS |
- DESCRIPTOR_BRANCH_ALWAYS);
- db->first_size =
- cpu_to_le16(max(ctx->base.header_size, (size_t)8));
- if (p->skip && rest == p->payload_length) {
- db->control |= cpu_to_le16(DESCRIPTOR_WAIT);
- db->first_req_count = db->first_size;
- } else {
- db->first_req_count = cpu_to_le16(header_size);
- }
- db->first_res_count = db->first_req_count;
- db->first_buffer = cpu_to_le32(d_bus + sizeof(*db));
-
- if (p->skip && rest == p->payload_length)
- length = 4;
- else if (offset + rest < PAGE_SIZE)
- length = rest;
- else
- length = PAGE_SIZE - offset;
-
- db->second_req_count = cpu_to_le16(length);
- db->second_res_count = db->second_req_count;
- page_bus = page_private(buffer->pages[page]);
- db->second_buffer = cpu_to_le32(page_bus + offset);
-
- if (p->interrupt && length == rest)
- db->control |= cpu_to_le16(DESCRIPTOR_IRQ_ALWAYS);
-
- context_append(&ctx->context, d, z, header_z);
- offset = (offset + length) & ~PAGE_MASK;
- rest -= length;
- if (offset == 0)
- page++;
- }
-
- return 0;
-}
-
static int ohci_queue_iso_receive_packet_per_buffer(struct fw_iso_context *base,
struct fw_iso_packet *packet,
struct fw_iso_buffer *buffer,
spin_lock_irqsave(&ctx->context.ohci->lock, flags);
if (base->type == FW_ISO_CONTEXT_TRANSMIT)
ret = ohci_queue_iso_transmit(base, packet, buffer, payload);
- else if (ctx->context.ohci->use_dualbuffer)
- ret = ohci_queue_iso_receive_dualbuffer(base, packet,
- buffer, payload);
else
ret = ohci_queue_iso_receive_packet_per_buffer(base, packet,
buffer, payload);
.send_response = ohci_send_response,
.cancel_packet = ohci_cancel_packet,
.enable_phys_dma = ohci_enable_phys_dma,
- .get_bus_time = ohci_get_bus_time,
+ .get_cycle_time = ohci_get_cycle_time,
.allocate_iso_context = ohci_allocate_iso_context,
.free_iso_context = ohci_free_iso_context,
#define ohci_pmac_off(dev)
#endif /* CONFIG_PPC_PMAC */
-#define PCI_VENDOR_ID_AGERE PCI_VENDOR_ID_ATT
-#define PCI_DEVICE_ID_AGERE_FW643 0x5901
-
static int __devinit pci_probe(struct pci_dev *dev,
const struct pci_device_id *ent)
{
struct fw_ohci *ohci;
u32 bus_options, max_receive, link_speed, version;
u64 guid;
- int err;
+ int i, err, n_ir, n_it;
size_t size;
ohci = kzalloc(sizeof(*ohci), GFP_KERNEL);
goto fail_iomem;
}
- version = reg_read(ohci, OHCI1394_Version) & 0x00ff00ff;
-#if 0
- /* FIXME: make it a context option or remove dual-buffer mode */
- ohci->use_dualbuffer = version >= OHCI_VERSION_1_1;
-#endif
-
- /* dual-buffer mode is broken if more than one IR context is active */
- if (dev->vendor == PCI_VENDOR_ID_AGERE &&
- dev->device == PCI_DEVICE_ID_AGERE_FW643)
- ohci->use_dualbuffer = false;
-
- /* dual-buffer mode is broken */
- if (dev->vendor == PCI_VENDOR_ID_RICOH &&
- dev->device == PCI_DEVICE_ID_RICOH_R5C832)
- ohci->use_dualbuffer = false;
-
-/* x86-32 currently doesn't use highmem for dma_alloc_coherent */
-#if !defined(CONFIG_X86_32)
- /* dual-buffer mode is broken with descriptor addresses above 2G */
- if (dev->vendor == PCI_VENDOR_ID_TI &&
- dev->device == PCI_DEVICE_ID_TI_TSB43AB22)
- ohci->use_dualbuffer = false;
-#endif
-
-#if defined(CONFIG_PPC_PMAC) && defined(CONFIG_PPC32)
- ohci->old_uninorth = dev->vendor == PCI_VENDOR_ID_APPLE &&
- dev->device == PCI_DEVICE_ID_APPLE_UNI_N_FW;
-#endif
- ohci->bus_reset_packet_quirk = dev->vendor == PCI_VENDOR_ID_TI;
-
- ohci->iso_cycle_timer_quirk = dev->vendor == PCI_VENDOR_ID_AL ||
- dev->vendor == PCI_VENDOR_ID_NEC ||
- dev->vendor == PCI_VENDOR_ID_VIA;
+ for (i = 0; i < ARRAY_SIZE(ohci_quirks); i++)
+ if (ohci_quirks[i].vendor == dev->vendor &&
+ (ohci_quirks[i].device == dev->device ||
+ ohci_quirks[i].device == (unsigned short)PCI_ANY_ID)) {
+ ohci->quirks = ohci_quirks[i].flags;
+ break;
+ }
+ if (param_quirks)
+ ohci->quirks = param_quirks;
ar_context_init(&ohci->ar_request_ctx, ohci,
OHCI1394_AsReqRcvContextControlSet);
OHCI1394_AsRspTrContextControlSet, handle_at_packet);
reg_write(ohci, OHCI1394_IsoRecvIntMaskSet, ~0);
- ohci->it_context_mask = reg_read(ohci, OHCI1394_IsoRecvIntMaskSet);
+ ohci->ir_context_channels = ~0ULL;
+ ohci->ir_context_mask = reg_read(ohci, OHCI1394_IsoRecvIntMaskSet);
reg_write(ohci, OHCI1394_IsoRecvIntMaskClear, ~0);
- size = sizeof(struct iso_context) * hweight32(ohci->it_context_mask);
- ohci->it_context_list = kzalloc(size, GFP_KERNEL);
+ n_ir = hweight32(ohci->ir_context_mask);
+ size = sizeof(struct iso_context) * n_ir;
+ ohci->ir_context_list = kzalloc(size, GFP_KERNEL);
reg_write(ohci, OHCI1394_IsoXmitIntMaskSet, ~0);
- ohci->ir_context_channels = ~0ULL;
- ohci->ir_context_mask = reg_read(ohci, OHCI1394_IsoXmitIntMaskSet);
+ ohci->it_context_mask = reg_read(ohci, OHCI1394_IsoXmitIntMaskSet);
reg_write(ohci, OHCI1394_IsoXmitIntMaskClear, ~0);
- size = sizeof(struct iso_context) * hweight32(ohci->ir_context_mask);
- ohci->ir_context_list = kzalloc(size, GFP_KERNEL);
+ n_it = hweight32(ohci->it_context_mask);
+ size = sizeof(struct iso_context) * n_it;
+ ohci->it_context_list = kzalloc(size, GFP_KERNEL);
if (ohci->it_context_list == NULL || ohci->ir_context_list == NULL) {
err = -ENOMEM;
if (err)
goto fail_self_id;
- fw_notify("Added fw-ohci device %s, OHCI version %x.%x\n",
- dev_name(&dev->dev), version >> 16, version & 0xff);
+ version = reg_read(ohci, OHCI1394_Version) & 0x00ff00ff;
+ fw_notify("Added fw-ohci device %s, OHCI v%x.%x, "
+ "%d IR + %d IT contexts, quirks 0x%x\n",
+ dev_name(&dev->dev), version >> 16, version & 0xff,
+ n_ir, n_it, ohci->quirks);
return 0;
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff