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path: root/drivers/firewire/nosy.c
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Diffstat (limited to 'drivers/firewire/nosy.c')
-rw-r--r--drivers/firewire/nosy.c322
1 files changed, 153 insertions, 169 deletions
diff --git a/drivers/firewire/nosy.c b/drivers/firewire/nosy.c
index 079710bf1197..ea392d0985a5 100644
--- a/drivers/firewire/nosy.c
+++ b/drivers/firewire/nosy.c
@@ -1,7 +1,6 @@
-/* -*- c-file-style: "linux" -*-
- *
- * nosy.c - Snoop mode driver for TI pcilynx 1394 controllers
- * Copyright (C) 2002 Kristian Høgsberg
+/*
+ * nosy - Snoop mode driver for TI PCILynx 1394 controllers
+ * Copyright (C) 2002-2007 Kristian Høgsberg
*
* 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
@@ -18,23 +17,25 @@
* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
-#include <linux/kernel.h>
-#include <linux/slab.h>
-#include <linux/interrupt.h>
-#include <linux/sched.h> /* required for linux/wait.h */
-#include <linux/wait.h>
#include <linux/errno.h>
-#include <linux/module.h>
+#include <linux/fs.h>
#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/miscdevice.h>
+#include <linux/module.h>
#include <linux/pci.h>
-#include <linux/fs.h>
#include <linux/poll.h>
-#include <linux/miscdevice.h>
-#include <asm/byteorder.h>
+#include <linux/sched.h> /* required for linux/wait.h */
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/timex.h>
+#include <linux/uaccess.h>
+#include <linux/wait.h>
+
#include <asm/atomic.h>
-#include <asm/io.h>
-#include <asm/uaccess.h>
-#include <asm/timex.h>
+#include <asm/byteorder.h>
#include "nosy.h"
#include "nosy-user.h"
@@ -46,7 +47,7 @@
#define error(s, args...) printk(KERN_ERR s, ## args)
#define debug(s, args...) printk(KERN_DEBUG s, ## args)
-static const char driver_name[] = "nosy";
+static char driver_name[] = KBUILD_MODNAME;
struct pcl_status {
unsigned int transfer_count : 13;
@@ -77,8 +78,7 @@ struct pcl {
} __attribute__ ((packed));
struct packet {
- unsigned int length : 16;
- unsigned int code : 16;
+ unsigned int length;
char data[0];
};
@@ -87,8 +87,8 @@ struct packet_buffer {
size_t capacity;
long total_packet_count, lost_packet_count;
atomic_t size;
- struct packet *head, *tail;
- wait_queue_head_t wait;
+ struct packet *head, *tail;
+ wait_queue_head_t wait;
};
struct pcilynx {
@@ -106,7 +106,6 @@ struct pcilynx {
struct miscdevice misc;
};
-
struct client {
struct pcilynx *lynx;
unsigned long tcode_mask;
@@ -115,7 +114,7 @@ struct client {
};
#define MAX_MINORS 64
-struct pcilynx *minors[MAX_MINORS];
+static struct pcilynx *minors[MAX_MINORS];
static int
packet_buffer_init(struct packet_buffer *buffer, size_t capacity)
@@ -128,7 +127,7 @@ packet_buffer_init(struct packet_buffer *buffer, size_t capacity)
buffer->capacity = capacity;
buffer->lost_packet_count = 0;
atomic_set(&buffer->size, 0);
- init_waitqueue_head(&buffer->wait);
+ init_waitqueue_head(&buffer->wait);
return 0;
}
@@ -158,8 +157,7 @@ packet_buffer_get(struct packet_buffer *buffer, void *data, size_t user_length)
if (copy_to_user(data, buffer->head->data, length))
return -EFAULT;
buffer->head = (struct packet *) &buffer->head->data[length];
- }
- else {
+ } else {
size_t split = end - buffer->head->data;
if (copy_to_user(data, buffer->head->data, split))
@@ -169,11 +167,12 @@ packet_buffer_get(struct packet_buffer *buffer, void *data, size_t user_length)
buffer->head = (struct packet *) &buffer->data[length - split];
}
- /* Decrease buffer->size as the last thing, since this is what
+ /*
+ * Decrease buffer->size as the last thing, since this is what
* keeps the interrupt from overwriting the packet we are
- * retrieving from the buffer. */
-
- atomic_sub(sizeof (struct packet) + length, &buffer->size);
+ * retrieving from the buffer.
+ */
+ atomic_sub(sizeof(struct packet) + length, &buffer->size);
return length;
}
@@ -185,8 +184,8 @@ packet_buffer_put(struct packet_buffer *buffer, void *data, size_t length)
buffer->total_packet_count++;
- if (buffer->capacity <
- atomic_read(&buffer->size) + sizeof (struct packet) + length) {
+ if (buffer->capacity <
+ atomic_read(&buffer->size) + sizeof(struct packet) + length) {
buffer->lost_packet_count++;
return;
}
@@ -197,69 +196,68 @@ packet_buffer_put(struct packet_buffer *buffer, void *data, size_t length)
if (&buffer->tail->data[length] < end) {
memcpy(buffer->tail->data, data, length);
buffer->tail = (struct packet *) &buffer->tail->data[length];
- }
- else {
+ } else {
size_t split = end - buffer->tail->data;
memcpy(buffer->tail->data, data, split);
memcpy(buffer->data, data + split, length - split);
buffer->tail = (struct packet *) &buffer->data[length - split];
}
-
+
/* Finally, adjust buffer size and wake up userspace reader. */
- atomic_add(sizeof (struct packet) + length, &buffer->size);
+ atomic_add(sizeof(struct packet) + length, &buffer->size);
wake_up_interruptible(&buffer->wait);
}
static inline void
reg_write(struct pcilynx *lynx, int offset, u32 data)
{
- writel(data, lynx->registers + offset);
+ writel(data, lynx->registers + offset);
}
static inline u32
reg_read(struct pcilynx *lynx, int offset)
{
- return readl(lynx->registers + offset);
+ return readl(lynx->registers + offset);
}
static inline void
reg_set_bits(struct pcilynx *lynx, int offset, u32 mask)
{
- reg_write(lynx, offset, (reg_read(lynx, offset) | mask));
+ reg_write(lynx, offset, (reg_read(lynx, offset) | mask));
}
-/* Maybe the pcl programs could be setup to just append data instead
- * of using a whole packet. */
-
-static inline void
-run_pcl(struct pcilynx *lynx, dma_addr_t pcl_bus, int dmachan)
+/*
+ * Maybe the pcl programs could be set up to just append data instead
+ * of using a whole packet.
+ */
+static inline void
+run_pcl(struct pcilynx *lynx, dma_addr_t pcl_bus,
+ int dmachan)
{
- reg_write(lynx, DMA0_CURRENT_PCL + dmachan * 0x20, pcl_bus);
- reg_write(lynx, DMA0_CHAN_CTRL + dmachan * 0x20,
- DMA_CHAN_CTRL_ENABLE | DMA_CHAN_CTRL_LINK);
+ reg_write(lynx, DMA0_CURRENT_PCL + dmachan * 0x20, pcl_bus);
+ reg_write(lynx, DMA0_CHAN_CTRL + dmachan * 0x20,
+ DMA_CHAN_CTRL_ENABLE | DMA_CHAN_CTRL_LINK);
}
static int
set_phy_reg(struct pcilynx *lynx, int addr, int val)
{
- if (addr > 15) {
- debug("%s: PHY register address %d out of range",
- __FUNCTION__, addr);
- return -1;
- }
-
- if (val > 0xff) {
- debug("%s: PHY register value %d out of range",
- __FUNCTION__, val);
- return -1;
- }
-
- reg_write(lynx, LINK_PHY, LINK_PHY_WRITE |
+ if (addr > 15) {
+ debug("PHY register address %d out of range\n", addr);
+ return -1;
+ }
+
+ if (val > 0xff) {
+ debug("PHY register value %d out of range\n", val);
+ return -1;
+ }
+
+ reg_write(lynx, LINK_PHY, LINK_PHY_WRITE |
LINK_PHY_ADDR(addr) | LINK_PHY_WDATA(val));
- return 0;
+ return 0;
}
static void
@@ -317,7 +315,7 @@ nosy_open(struct inode *inode, struct file *file)
if (minor > MAX_MINORS || minors[minor] == NULL)
return -ENODEV;
- file->private_data = nosy_add_client(minors[minor]);
+ file->private_data = nosy_add_client(minors[minor]);
if (file->private_data == NULL)
return -ENOMEM;
else
@@ -329,7 +327,7 @@ nosy_release(struct inode *inode, struct file *file)
{
nosy_remove_client(file->private_data);
- return 0;
+ return 0;
}
static unsigned int
@@ -358,19 +356,17 @@ nosy_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{
struct client *client = file->private_data;
+ struct nosy_stats stats;
switch (cmd) {
- case NOSY_IOC_GET_STATS: {
- struct nosy_stats stats;
-
+ case NOSY_IOC_GET_STATS:
stats.total_packet_count = client->buffer.total_packet_count;
stats.lost_packet_count = client->buffer.lost_packet_count;
if (copy_to_user((void *) arg, &stats, sizeof stats))
return -EFAULT;
else
return 0;
- }
-
+
case NOSY_IOC_START:
nosy_start_snoop(client);
return 0;
@@ -389,13 +385,13 @@ nosy_ioctl(struct inode *inode, struct file *file,
}
}
-static struct file_operations nosy_ops = {
+static const struct file_operations nosy_ops = {
.owner = THIS_MODULE,
- .read = nosy_read,
+ .read = nosy_read,
.ioctl = nosy_ioctl,
- .poll = nosy_poll,
- .open = nosy_open,
- .release = nosy_release,
+ .poll = nosy_poll,
+ .open = nosy_open,
+ .release = nosy_release,
};
#define PHY_PACKET_SIZE 12 /* 1 payload, 1 inverse, 1 ack = 3 quadlets */
@@ -412,7 +408,6 @@ static void
packet_handler(struct pcilynx *lynx)
{
unsigned long flags;
- struct list_head *pos;
struct client *client;
unsigned long tcode_mask;
size_t length;
@@ -434,12 +429,10 @@ packet_handler(struct pcilynx *lynx)
spin_lock_irqsave(&lynx->client_list_lock, flags);
- list_for_each(pos, &lynx->client_list) {
- client = list_entry(pos, struct client, link);
+ list_for_each_entry(client, &lynx->client_list, link)
if (client->tcode_mask & tcode_mask)
- packet_buffer_put(&client->buffer,
+ packet_buffer_put(&client->buffer,
lynx->rcv_buffer, length + 4);
- }
spin_unlock_irqrestore(&lynx->client_list_lock, flags);
}
@@ -448,7 +441,6 @@ static void
bus_reset_handler(struct pcilynx *lynx)
{
unsigned long flags;
- struct list_head *pos;
struct client *client;
struct timeval tv;
@@ -456,23 +448,19 @@ bus_reset_handler(struct pcilynx *lynx)
spin_lock_irqsave(&lynx->client_list_lock, flags);
- list_for_each(pos, &lynx->client_list) {
- client = list_entry(pos, struct client, link);
+ list_for_each_entry(client, &lynx->client_list, link)
packet_buffer_put(&client->buffer, &tv.tv_usec, 4);
- }
spin_unlock_irqrestore(&lynx->client_list_lock, flags);
}
-
-
static irqreturn_t
irq_handler(int irq, void *device)
{
- struct pcilynx *lynx = (struct pcilynx *) device;
+ struct pcilynx *lynx = device;
u32 pci_int_status;
-
- pci_int_status = reg_read(lynx, PCI_INT_STATUS);
+
+ pci_int_status = reg_read(lynx, PCI_INT_STATUS);
if ((pci_int_status & PCI_INT_INT_PEND) == 0)
/* Not our interrupt, bail out quickly. */
@@ -505,19 +493,19 @@ irq_handler(int irq, void *device)
static void
remove_card(struct pci_dev *dev)
{
- struct pcilynx *lynx;
+ struct pcilynx *lynx;
- lynx = pci_get_drvdata(dev);
- if (!lynx)
+ lynx = pci_get_drvdata(dev);
+ if (!lynx)
return;
- pci_set_drvdata(dev, NULL);
+ pci_set_drvdata(dev, NULL);
reg_write(lynx, PCI_INT_ENABLE, 0);
free_irq(lynx->pci_device->irq, lynx);
- pci_free_consistent(lynx->pci_device, sizeof (struct pcl),
+ pci_free_consistent(lynx->pci_device, sizeof(struct pcl),
lynx->rcv_start_pcl, lynx->rcv_start_pcl_bus);
- pci_free_consistent(lynx->pci_device, sizeof (struct pcl),
+ pci_free_consistent(lynx->pci_device, sizeof(struct pcl),
lynx->rcv_pcl, lynx->rcv_pcl_bus);
pci_free_consistent(lynx->pci_device, PAGE_SIZE,
lynx->rcv_buffer, lynx->rcv_buffer_bus);
@@ -532,64 +520,58 @@ remove_card(struct pci_dev *dev)
#define RCV_BUFFER_SIZE (16 * 1024)
-#define FAIL(s, args...) \
- do { \
- error(s, ## args); \
- return err; \
- } while (0)
-
static int __devinit
add_card(struct pci_dev *dev, const struct pci_device_id *unused)
{
- struct pcilynx *lynx;
+ struct pcilynx *lynx;
u32 p, end;
- int err, i;
-
- err = -ENXIO;
+ int i;
- if (pci_set_dma_mask(dev, 0xffffffff))
- FAIL("DMA address limits not supported "
- "for PCILynx hardware.\n");
- if (pci_enable_device(dev))
- FAIL("Failed to enable PCILynx hardware.\n");
- pci_set_master(dev);
-
- err = -ENOMEM;
+ if (pci_set_dma_mask(dev, 0xffffffff)) {
+ error("DMA address limits not supported "
+ "for PCILynx hardware\n");
+ return -ENXIO;
+ }
+ if (pci_enable_device(dev)) {
+ error("Failed to enable PCILynx hardware\n");
+ return -ENXIO;
+ }
+ pci_set_master(dev);
lynx = kzalloc(sizeof *lynx, GFP_KERNEL);
- if (lynx == NULL)
- FAIL("Failed to allocate control structure memory.\n");
-
- lynx->pci_device = dev;
- pci_set_drvdata(dev, lynx);
+ if (lynx == NULL) {
+ error("Failed to allocate control structure memory\n");
+ return -ENOMEM;
+ }
+ lynx->pci_device = dev;
+ pci_set_drvdata(dev, lynx);
spin_lock_init(&lynx->client_list_lock);
INIT_LIST_HEAD(&lynx->client_list);
- lynx->registers = ioremap_nocache(pci_resource_start(dev, 0),
- PCILYNX_MAX_REGISTER);
-
- lynx->rcv_start_pcl = pci_alloc_consistent(lynx->pci_device,
- sizeof(struct pcl),
- &lynx->rcv_start_pcl_bus);
- lynx->rcv_pcl = pci_alloc_consistent(lynx->pci_device,
- sizeof(struct pcl),
- &lynx->rcv_pcl_bus);
- lynx->rcv_buffer = pci_alloc_consistent(lynx->pci_device, RCV_BUFFER_SIZE,
- &lynx->rcv_buffer_bus);
- if (lynx->rcv_start_pcl == NULL ||
+ lynx->registers = ioremap_nocache(pci_resource_start(dev, 0),
+ PCILYNX_MAX_REGISTER);
+
+ lynx->rcv_start_pcl = pci_alloc_consistent(lynx->pci_device,
+ sizeof(struct pcl), &lynx->rcv_start_pcl_bus);
+ lynx->rcv_pcl = pci_alloc_consistent(lynx->pci_device,
+ sizeof(struct pcl), &lynx->rcv_pcl_bus);
+ lynx->rcv_buffer = pci_alloc_consistent(lynx->pci_device,
+ RCV_BUFFER_SIZE, &lynx->rcv_buffer_bus);
+ if (lynx->rcv_start_pcl == NULL ||
lynx->rcv_pcl == NULL ||
- lynx->rcv_buffer == NULL)
+ lynx->rcv_buffer == NULL) {
/* FIXME: do proper error handling. */
- FAIL("Failed to allocate receive buffer.\n");
-
+ error("Failed to allocate receive buffer\n");
+ return -ENOMEM;
+ }
lynx->rcv_start_pcl->next = lynx->rcv_pcl_bus;
- lynx->rcv_pcl->next = PCL_NEXT_INVALID;
- lynx->rcv_pcl->async_error_next = PCL_NEXT_INVALID;
+ lynx->rcv_pcl->next = PCL_NEXT_INVALID;
+ lynx->rcv_pcl->async_error_next = PCL_NEXT_INVALID;
- lynx->rcv_pcl->buffer[0].control =
+ lynx->rcv_pcl->buffer[0].control =
PCL_CMD_RCV | PCL_BIGENDIAN | 2044;
- lynx->rcv_pcl->buffer[0].pointer = lynx->rcv_buffer_bus + 4;
+ lynx->rcv_pcl->buffer[0].pointer = lynx->rcv_buffer_bus + 4;
p = lynx->rcv_buffer_bus + 2048;
end = lynx->rcv_buffer_bus + RCV_BUFFER_SIZE;
for (i = 1; p < end; i++, p += 2048) {
@@ -599,31 +581,31 @@ add_card(struct pci_dev *dev, const struct pci_device_id *unused)
}
lynx->rcv_pcl->buffer[i - 1].control |= PCL_LAST_BUFF;
- reg_set_bits(lynx, MISC_CONTROL, MISC_CONTROL_SWRESET);
- /* Fix buggy cards with autoboot pin not tied low: */
- reg_write(lynx, DMA0_CHAN_CTRL, 0);
- reg_write(lynx, DMA_GLOBAL_REGISTER, 0x00 << 24);
+ reg_set_bits(lynx, MISC_CONTROL, MISC_CONTROL_SWRESET);
+ /* Fix buggy cards with autoboot pin not tied low: */
+ reg_write(lynx, DMA0_CHAN_CTRL, 0);
+ reg_write(lynx, DMA_GLOBAL_REGISTER, 0x00 << 24);
#if 0
- /* now, looking for PHY register set */
- if ((get_phy_reg(lynx, 2) & 0xe0) == 0xe0) {
- lynx->phyic.reg_1394a = 1;
- PRINT(KERN_INFO, lynx->id,
- "found 1394a conform PHY (using extended register set)");
- lynx->phyic.vendor = get_phy_vendorid(lynx);
- lynx->phyic.product = get_phy_productid(lynx);
- } else {
- lynx->phyic.reg_1394a = 0;
- PRINT(KERN_INFO, lynx->id, "found old 1394 PHY");
- }
+ /* now, looking for PHY register set */
+ if ((get_phy_reg(lynx, 2) & 0xe0) == 0xe0) {
+ lynx->phyic.reg_1394a = 1;
+ PRINT(KERN_INFO, lynx->id,
+ "found 1394a conform PHY (using extended register set)");
+ lynx->phyic.vendor = get_phy_vendorid(lynx);
+ lynx->phyic.product = get_phy_productid(lynx);
+ } else {
+ lynx->phyic.reg_1394a = 0;
+ PRINT(KERN_INFO, lynx->id, "found old 1394 PHY");
+ }
#endif
/* Setup the general receive FIFO max size. */
reg_write(lynx, FIFO_SIZES, 255);
- reg_set_bits(lynx, PCI_INT_ENABLE, PCI_INT_DMA_ALL);
+ reg_set_bits(lynx, PCI_INT_ENABLE, PCI_INT_DMA_ALL);
- reg_write(lynx, LINK_INT_ENABLE,
+ reg_write(lynx, LINK_INT_ENABLE,
LINK_INT_PHY_TIME_OUT | LINK_INT_PHY_REG_RCVD |
LINK_INT_PHY_BUSRESET | LINK_INT_IT_STUCK |
LINK_INT_AT_STUCK | LINK_INT_SNTRJ |
@@ -638,58 +620,60 @@ add_card(struct pci_dev *dev, const struct pci_device_id *unused)
run_pcl(lynx, lynx->rcv_start_pcl_bus, 0);
- if (request_irq(dev->irq, irq_handler, IRQF_SHARED, driver_name, lynx))
- FAIL("Failed to allocate shared interrupt %d.", dev->irq);
+ if (request_irq(dev->irq, irq_handler, IRQF_SHARED,
+ driver_name, lynx)) {
+ error("Failed to allocate shared interrupt %d\n", dev->irq);
+ return -EIO;
+ }
lynx->misc.parent = &dev->dev;
lynx->misc.minor = MISC_DYNAMIC_MINOR;
lynx->misc.name = "nosy";
lynx->misc.fops = &nosy_ops;
- if (misc_register(&lynx->misc))
- FAIL("Failed to register misc char device.");
+ if (misc_register(&lynx->misc)) {
+ error("Failed to register misc char device\n");
+ return -ENOMEM;
+ }
minors[lynx->misc.minor] = lynx;
notify("Initialized PCILynx IEEE1394 card, irq=%d\n", dev->irq);
- return 0;
+ return 0;
}
static struct pci_device_id pci_table[] __devinitdata = {
{
- .vendor = PCI_VENDOR_ID_TI,
- .device = PCI_DEVICE_ID_TI_PCILYNX,
- .subvendor = PCI_ANY_ID,
- .subdevice = PCI_ANY_ID,
+ .vendor = PCI_VENDOR_ID_TI,
+ .device = PCI_DEVICE_ID_TI_PCILYNX,
+ .subvendor = PCI_ANY_ID,
+ .subdevice = PCI_ANY_ID,
},
{ } /* Terminating entry */
};
static struct pci_driver lynx_pci_driver = {
- .name = (char *) driver_name,
+ .name = driver_name,
.id_table = pci_table,
.probe = add_card,
- .remove = __devexit_p(remove_card),
+ .remove = remove_card,
};
-MODULE_AUTHOR("Kristian Høgsberg");
+MODULE_AUTHOR("Kristian Hoegsberg");
MODULE_DESCRIPTION("Snoop mode driver for TI pcilynx 1394 controllers");
MODULE_LICENSE("GPL");
MODULE_DEVICE_TABLE(pci, pci_table);
static int __init nosy_init(void)
{
- /* notify("Loaded %s version %s.\n", driver_name, VERSION); */
-
- return pci_register_driver(&lynx_pci_driver);
+ return pci_register_driver(&lynx_pci_driver);
}
static void __exit nosy_cleanup(void)
{
- pci_unregister_driver(&lynx_pci_driver);
+ pci_unregister_driver(&lynx_pci_driver);
notify("Unloaded %s.\n", driver_name);
}
-
module_init(nosy_init);
module_exit(nosy_cleanup);
generated by cgit v1.2.3 (git 2.0.4) at 2024-11-10 17:07:05 +0000