Hello everybody reading this,
as outline attachment I send:
A. the unfinished driver called cx878, to be implied into the current
mercurial tree instead of /drivers/media/dvb/bt8xx it should be:
/drivers/media/dvb/cx878 (cx878.tar.bz2). Makefile and Kconfig need to be
changed then.
B. a dummy driver to show how to enhance the pci_probe function (dummy.c)
C. a kern.log with the two modules (i. e. cx878_core and cx878_budget) loaded
with verbose=5. This will give you some hints about what function works and
what function does not work.
D. a console.txt that shows that the I2C bus part, working on the video
controller part (i. e. device=0x036e) works excellently fine (i. e. FRONTEND
LOCKED, proved by using szap)
There do exist two alternatives on how to finish / complete that project:
Alternative A:
1. Using the dummy.c example to extend the capabilities of pci_probe
(i. e. probe TWO devices instead of ONE)
Alternative B:
2. Generating a separate module for the audio controller
(i. e. the RISC DMA engine) with a separate header file
Right now, the pci_probe function is only used to probe seven different
bt8xx-based cards to ensure that the adequate frontend is loaded.
But this is not enough to make the whole driver work fine.
Excerpt of cx878_budget.c shows that:
static struct pci_device_id cx878_budget_pci_table[] = {
MAKE_ENTRY(0x11bd, 0x001c,
&cx878_pctvsat_config), /* Pinnacle Sat */
MAKE_ENTRY(0x1461, 0x0761,
&cx878_aver761_config), /* Avermedia 761 */
MAKE_ENTRY(0x1461, 0x0771,
&cx878_aver771_config), /* Avermedia 771 */
MAKE_ENTRY(0x0071, 0x0101, &cx878_nebula_dtv_config), /* Nebula
DigiTV */
MAKE_ENTRY(0x18ac, 0xdb10, &cx878_dvico_dvbt_config), /* DViCO
Fusion DVB-T
*/
MAKE_ENTRY(0x18ac, 0xd500, &cx878_dvico_hdtv_config), /* DViCO
Fusion HDTV5
*/
MAKE_ENTRY(0x7063, 0x2000,
&cx878_pchdtv_config), /* PCHDTV-2000 */
};
MODULE_DEVICE_TABLE(pci, cx878_budget_pci_table);
static struct pci_driver cx878_budget_pci_driver = {
.name = "CX878 Budget",
.id_table = cx878_budget_pci_table,
.probe = cx878_budget_pci_probe,
.remove = cx878_budget_pci_remove,
};
Excerpt of cx878_common.h shows that also:
#define MAKE_ENTRY(subven, subdev, configptr) { \
.vendor = 0x109e, \
.device = 0x036e, \
.subvendor = (subven), \
.subdevice = (subdev), \
.driver_data = (unsigned long) (configptr) \
}
Please note:
As stated in dummy.c, all seven cards have a common video controller address
(device=0x036e - I2C bus) and a common audio controller address
(device=0x0878 - RISC DMA engine).
So please where is the appropriate solution?
Is it Alternative A or Alternative B?
If this is being finished or even can be finished there will be a driver for
bt8xx-based DVB cards consuming less than 2 / 7 of RAM in comparison to the
existing driver being dependent of some GPIO and I2C functions (derived from
the traditional bttv concept which provides a lot of RAM-wasting
dependency-nonsense) who AFAICS do work fine in the existing cx878 model.
The only decisive question is how to imply the DMA RISC engine (i. e. audio
controller - device=0x0878) under the same roof without conflicts and thus
getting out video and audio streams, which is not possible at the current
development state.
As I said already: Everybody's help is deeply appreciated.
Cheers everybody and thanks for reading this
Uwe
brian:~# szap -r ZDF reading channels from file '/root/.szap/channels.conf' zapping to 7 'ZDF': sat 0, frequency = 11953 MHz H, symbolrate 27500000, vpid = 0x006e, apid = 0x0078 using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0' status 03 | signal 9797 | snr 0000 | ber 00000000 | unc 0000f8b4 | status 1f | signal 9797 | snr 1c9c | ber 00007ce0 | unc 00000000 | FE_HAS_LOCK status 1f | signal 9797 | snr 1d5b | ber 0000779d | unc 00000000 | FE_HAS_LOCK status 1f | signal 9797 | snr 1e4e | ber 000084d7 | unc 00000000 | FE_HAS_LOCK status 1f | signal 9797 | snr 1db9 | ber 0000828a | unc 00000000 | FE_HAS_LOCK status 1f | signal 9797 | snr 1dd6 | ber 000086c7 | unc 00000000 | FE_HAS_LOCK status 1f | signal 9797 | snr 1e8a | ber 000083cf | unc 00000000 | FE_HAS_LOCK status 1f | signal 9797 | snr 1d13 | ber 00008009 | unc 00000000 | FE_HAS_LOCK status 1f | signal 9797 | snr 1cc6 | ber 00007ad5 | unc 00000000 | FE_HAS_LOCK status 1f | signal 9797 | snr 1dc4 | ber 00007f08 | unc 00000000 | FE_HAS_LOCK status 1f | signal 9797 | snr 1f17 | ber 00008d54 | unc 00000000 | FE_HAS_LOCK status 1f | signal 9797 | snr 1e63 | ber 00008757 | unc 00000000 | FE_HAS_LOCK status 1f | signal 9797 | snr 1dc3 | ber 00007dc9 | unc 00000000 | FE_HAS_LOCK status 1f | signal 9797 | snr 1f49 | ber 00008b64 | unc 00000000 | FE_HAS_LOCK status 1f | signal 9797 | snr 1e28 | ber 000083fe | unc 00000000 | FE_HAS_LOCK
Attachment:
cx878.tar.bz2
Description: application/tbz
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/slab.h>
static LIST_HEAD(cx878_pci_list);
static DEFINE_MUTEX(cx878_pci_list_lock);
struct pci_cx878_data {
int cx878_counter;
int id;
struct list_head cx878_list;
};
// Pinnacle PCTVSAT, Avermedia AverTV DVB-T 771 and 761, TT 1.6 DVB-S FF, TwinHan DST and clones, all other bt8xx-based DVB cards equally
static struct pci_device_id pci_cx878_ids[]={
{ 0x109e, 0x036e, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 }, // function 0, video controller (I2C bus)
{ 0x109e, 0x0878, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 }, // function 1, audio controller (RISC DMA engine)
{}
};
static int __devinit pci_cx878_probe(struct pci_dev *pdev, const struct pci_device_id *pci_id)
{
struct list_head *list = NULL;
struct pci_cx878_data *h = NULL, *dev = NULL;
int id;
id = (pdev->bus->number<<8) | PCI_SLOT(pdev->devfn);
printk("ID: %04x\n",id);
mutex_lock(&cx878_pci_list_lock);
list_for_each(list, &cx878_pci_list) {
h = list_entry(list, struct pci_cx878_data, cx878_list);
if (h->id == id)
dev=h;
}
if (h != NULL) {
dev->cx878_counter++;
printk("found cx878 list (ID: %04x)! : %d\n",dev->id,dev->cx878_counter);
} else {
h=kmalloc(sizeof(struct pci_cx878_data), GFP_KERNEL);
h->cx878_counter=5;
h->id=id;
list_add_tail(&h->cx878_list, &cx878_pci_list);
printk("no list available initializing new one (id: %04x): %d\n",h->id, h->cx878_counter);
}
mutex_unlock(&cx878_pci_list_lock);
return 0;
}
static struct pci_driver driver = {
.name = "cx878",
.id_table = pci_cx878_ids,
.probe = pci_cx878_probe,
};
static int __init pci_driver_init(void)
{
printk("=============== LOADING MODULE ===============\n");
return pci_register_driver(&driver);
}
static void __exit pci_driver_exit(void)
{
pci_unregister_driver(&driver);
}
module_init(pci_driver_init);
module_exit(pci_driver_exit);
Attachment:
kern.log.bz2
Description: BZip2 compressed data
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