V4L/DVB (10756): cx18: Slim down instance handling, build names from v4l2_device.name
Convert card instance handling to a lighter weight mechanism like ivtv.
Also convert name strings and debug messages to use v4l2_device.name.
Signed-off-by: Andy Walls <awalls@radix.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/video/cx18/cx18-driver.c b/drivers/media/video/cx18/cx18-driver.c
index 2a45bbc..f69e688 100644
--- a/drivers/media/video/cx18/cx18-driver.c
+++ b/drivers/media/video/cx18/cx18-driver.c
@@ -39,10 +39,6 @@
#include <media/tveeprom.h>
-
-/* var to keep track of the number of array elements in use */
-int cx18_cards_active;
-
/* If you have already X v4l cards, then set this to X. This way
the device numbers stay matched. Example: you have a WinTV card
without radio and a Compro H900 with. Normally this would give a
@@ -50,12 +46,6 @@
setting this to 1 you ensure that radio0 is now also radio1. */
int cx18_first_minor;
-/* Master variable for all cx18 info */
-struct cx18 *cx18_cards[CX18_MAX_CARDS];
-
-/* Protects cx18_cards_active */
-DEFINE_SPINLOCK(cx18_cards_lock);
-
/* add your revision and whatnot here */
static struct pci_device_id cx18_pci_tbl[] __devinitdata = {
{PCI_VENDOR_ID_CX, PCI_DEVICE_ID_CX23418,
@@ -65,6 +55,8 @@
MODULE_DEVICE_TABLE(pci, cx18_pci_tbl);
+static atomic_t cx18_instance = ATOMIC_INIT(0);
+
/* Parameter declarations */
static int cardtype[CX18_MAX_CARDS];
static int tuner[CX18_MAX_CARDS] = { -1, -1, -1, -1, -1, -1, -1, -1,
@@ -491,9 +483,9 @@
cx->stream_buf_size[i] *= 1024; /* convert from kB to bytes */
}
- cx->options.cardtype = cardtype[cx->num];
- cx->options.tuner = tuner[cx->num];
- cx->options.radio = radio[cx->num];
+ cx->options.cardtype = cardtype[cx->instance];
+ cx->options.tuner = tuner[cx->instance];
+ cx->options.radio = radio[cx->instance];
cx->std = cx18_parse_std(cx);
if (cx->options.cardtype == -1) {
@@ -550,7 +542,7 @@
}
/* Precondition: the cx18 structure has been memset to 0. Only
- the dev and num fields have been filled in.
+ the dev and instance fields have been filled in.
No assumptions on the card type may be made here (see cx18_init_struct2
for that).
*/
@@ -567,7 +559,7 @@
mutex_init(&cx->epu2apu_mb_lock);
mutex_init(&cx->epu2cpu_mb_lock);
- cx->work_queue = create_singlethread_workqueue(cx->name);
+ cx->work_queue = create_singlethread_workqueue(cx->v4l2_dev.name);
if (cx->work_queue == NULL) {
CX18_ERR("Unable to create work hander thread\n");
return -ENOMEM;
@@ -647,15 +639,16 @@
CX18_DEBUG_INFO("Enabling pci device\n");
if (pci_enable_device(pci_dev)) {
- CX18_ERR("Can't enable device %d!\n", cx->num);
+ CX18_ERR("Can't enable device %d!\n", cx->instance);
return -EIO;
}
if (pci_set_dma_mask(pci_dev, 0xffffffff)) {
- CX18_ERR("No suitable DMA available on card %d.\n", cx->num);
+ CX18_ERR("No suitable DMA available, card %d\n", cx->instance);
return -EIO;
}
if (!request_mem_region(cx->base_addr, CX18_MEM_SIZE, "cx18 encoder")) {
- CX18_ERR("Cannot request encoder memory region on card %d.\n", cx->num);
+ CX18_ERR("Cannot request encoder memory region, card %d\n",
+ cx->instance);
return -EIO;
}
@@ -741,44 +734,42 @@
u32 devtype;
struct cx18 *cx;
- spin_lock(&cx18_cards_lock);
-
- /* Make sure we've got a place for this card */
- if (cx18_cards_active == CX18_MAX_CARDS) {
- printk(KERN_ERR "cx18: Maximum number of cards detected (%d).\n",
- cx18_cards_active);
- spin_unlock(&cx18_cards_lock);
+ /* FIXME - module parameter arrays constrain max instances */
+ i = atomic_inc_return(&cx18_instance) - 1;
+ if (i >= CX18_MAX_CARDS) {
+ printk(KERN_ERR "cx18: cannot manage card %d, driver has a "
+ "limit of 0 - %d\n", i, CX18_MAX_CARDS - 1);
return -ENOMEM;
}
cx = kzalloc(sizeof(struct cx18), GFP_ATOMIC);
- if (!cx) {
- spin_unlock(&cx18_cards_lock);
+ if (cx == NULL) {
+ printk(KERN_ERR "cx18: cannot manage card %d, out of memory\n",
+ i);
return -ENOMEM;
}
- cx18_cards[cx18_cards_active] = cx;
- cx->num = cx18_cards_active++;
- snprintf(cx->name, sizeof(cx->name), "cx18-%d", cx->num);
- CX18_INFO("Initializing card #%d\n", cx->num);
-
- spin_unlock(&cx18_cards_lock);
-
cx->pci_dev = pci_dev;
+ cx->instance = i;
+
retval = v4l2_device_register(&pci_dev->dev, &cx->v4l2_dev);
if (retval) {
- CX18_ERR("Call to v4l2_device_register() failed\n");
- goto err;
+ printk(KERN_ERR "cx18: v4l2_device_register of card %d failed"
+ "\n", cx->instance);
+ kfree(cx);
+ return retval;
}
- CX18_DEBUG_INFO("registered v4l2_device name: %s\n", cx->v4l2_dev.name);
+ snprintf(cx->v4l2_dev.name, sizeof(cx->v4l2_dev.name), "cx18-%d",
+ cx->instance);
+ CX18_INFO("Initializing card %d\n", cx->instance);
cx18_process_options(cx);
if (cx->options.cardtype == -1) {
retval = -ENODEV;
- goto unregister_v4l2;
+ goto err;
}
if (cx18_init_struct1(cx)) {
retval = -ENOMEM;
- goto unregister_v4l2;
+ goto err;
}
CX18_DEBUG_INFO("base addr: 0x%08x\n", cx->base_addr);
@@ -829,8 +820,6 @@
goto free_map;
}
- CX18_DEBUG_INFO("Active card count: %d.\n", cx18_cards_active);
-
if (cx->card->hw_all & CX18_HW_TVEEPROM) {
/* Based on the model number the cardtype may be changed.
The PCI IDs are not always reliable. */
@@ -847,7 +836,8 @@
/* Register IRQ */
retval = request_irq(cx->pci_dev->irq, cx18_irq_handler,
- IRQF_SHARED | IRQF_DISABLED, cx->name, (void *)cx);
+ IRQF_SHARED | IRQF_DISABLED,
+ cx->v4l2_dev.name, (void *)cx);
if (retval) {
CX18_ERR("Failed to register irq %d\n", retval);
goto free_i2c;
@@ -933,8 +923,7 @@
goto free_streams;
}
- CX18_INFO("Initialized card #%d: %s\n", cx->num, cx->card_name);
-
+ CX18_INFO("Initialized card: %s\n", cx->card_name);
return 0;
free_streams:
@@ -949,18 +938,13 @@
release_mem_region(cx->base_addr, CX18_MEM_SIZE);
free_workqueue:
destroy_workqueue(cx->work_queue);
-unregister_v4l2:
- v4l2_device_unregister(&cx->v4l2_dev);
err:
if (retval == 0)
retval = -ENODEV;
CX18_ERR("Error %d on initialization\n", retval);
- i = cx->num;
- spin_lock(&cx18_cards_lock);
- kfree(cx18_cards[i]);
- cx18_cards[i] = NULL;
- spin_unlock(&cx18_cards_lock);
+ v4l2_device_unregister(&cx->v4l2_dev);
+ kfree(cx);
return retval;
}
@@ -1069,9 +1053,9 @@
static void cx18_remove(struct pci_dev *pci_dev)
{
struct v4l2_device *v4l2_dev = pci_get_drvdata(pci_dev);
- struct cx18 *cx = container_of(v4l2_dev, struct cx18, v4l2_dev);
+ struct cx18 *cx = to_cx18(v4l2_dev);
- CX18_DEBUG_INFO("Removing Card #%d\n", cx->num);
+ CX18_DEBUG_INFO("Removing Card\n");
/* Stop all captures */
CX18_DEBUG_INFO("Stopping all streams\n");
@@ -1099,10 +1083,12 @@
release_mem_region(cx->base_addr, CX18_MEM_SIZE);
pci_disable_device(cx->pci_dev);
+ /* FIXME - we leak cx->vbi.sliced_mpeg_data[i] allocations */
+
+ CX18_INFO("Removed %s\n", cx->card_name);
v4l2_device_unregister(v4l2_dev);
-
- CX18_INFO("Removed %s, card #%d\n", cx->card_name, cx->num);
+ kfree(cx);
}
/* define a pci_driver for card detection */
@@ -1117,8 +1103,6 @@
{
printk(KERN_INFO "cx18: Start initialization, version %s\n", CX18_VERSION);
- memset(cx18_cards, 0, sizeof(cx18_cards));
-
/* Validate parameters */
if (cx18_first_minor < 0 || cx18_first_minor >= CX18_MAX_CARDS) {
printk(KERN_ERR "cx18: Exiting, cx18_first_minor must be between 0 and %d\n",
@@ -1141,16 +1125,7 @@
static void module_cleanup(void)
{
- int i;
-
pci_unregister_driver(&cx18_pci_driver);
-
- for (i = 0; i < cx18_cards_active; i++) {
- if (cx18_cards[i] == NULL)
- continue;
- kfree(cx18_cards[i]);
- }
-
}
module_init(module_start);