2 saa7146.o - driver for generic saa7146-based hardware
4 Copyright (C) 1998-2003 Michael Hunold <michael@mihu.de>
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 #include <media/saa7146.h>
23 LIST_HEAD(saa7146_devices
);
24 DEFINE_MUTEX(saa7146_devices_lock
);
26 static int saa7146_num
;
28 unsigned int saa7146_debug
;
30 module_param(saa7146_debug
, uint
, 0644);
31 MODULE_PARM_DESC(saa7146_debug
, "debug level (default: 0)");
34 static void dump_registers(struct saa7146_dev
* dev
)
38 INFO((" @ %li jiffies:\n",jiffies
));
39 for(i
= 0; i
<= 0x148; i
+=4) {
40 printk("0x%03x: 0x%08x\n",i
,saa7146_read(dev
,i
));
45 /****************************************************************************
46 * gpio and debi helper functions
47 ****************************************************************************/
49 void saa7146_setgpio(struct saa7146_dev
*dev
, int port
, u32 data
)
55 value
= saa7146_read(dev
, GPIO_CTRL
);
56 value
&= ~(0xff << (8*port
));
57 value
|= (data
<< (8*port
));
58 saa7146_write(dev
, GPIO_CTRL
, value
);
61 /* This DEBI code is based on the saa7146 Stradis driver by Nathan Laredo */
62 int saa7146_wait_for_debi_done(struct saa7146_dev
*dev
, int nobusyloop
)
67 /* wait for registers to be programmed */
70 err
= time_after(jiffies
, start
+ HZ
/20);
71 if (saa7146_read(dev
, MC2
) & 2)
74 DEB_S(("timed out while waiting for registers getting programmed\n"));
81 /* wait for transfer to complete */
84 err
= time_after(jiffies
, start
+ HZ
/4);
85 if (!(saa7146_read(dev
, PSR
) & SPCI_DEBI_S
))
87 saa7146_read(dev
, MC2
);
89 DEB_S(("timed out while waiting for transfer completion\n"));
99 /****************************************************************************
100 * general helper functions
101 ****************************************************************************/
103 /* this is videobuf_vmalloc_to_sg() from videobuf-dma-sg.c
104 make sure virt has been allocated with vmalloc_32(), otherwise the BUG()
105 may be triggered on highmem machines */
106 static struct scatterlist
* vmalloc_to_sg(unsigned char *virt
, int nr_pages
)
108 struct scatterlist
*sglist
;
112 sglist
= kcalloc(nr_pages
, sizeof(struct scatterlist
), GFP_KERNEL
);
115 sg_init_table(sglist
, nr_pages
);
116 for (i
= 0; i
< nr_pages
; i
++, virt
+= PAGE_SIZE
) {
117 pg
= vmalloc_to_page(virt
);
120 BUG_ON(PageHighMem(pg
));
121 sg_set_page(&sglist
[i
], pg
, PAGE_SIZE
, 0);
130 /********************************************************************************/
131 /* common page table functions */
133 void *saa7146_vmalloc_build_pgtable(struct pci_dev
*pci
, long length
, struct saa7146_pgtable
*pt
)
135 int pages
= (length
+PAGE_SIZE
-1)/PAGE_SIZE
;
136 void *mem
= vmalloc_32(length
);
142 if (!(pt
->slist
= vmalloc_to_sg(mem
, pages
)))
145 if (saa7146_pgtable_alloc(pci
, pt
))
149 slen
= pci_map_sg(pci
,pt
->slist
,pt
->nents
,PCI_DMA_FROMDEVICE
);
151 goto err_free_pgtable
;
153 if (0 != saa7146_pgtable_build_single(pci
, pt
, pt
->slist
, slen
))
159 pci_unmap_sg(pci
, pt
->slist
, pt
->nents
, PCI_DMA_FROMDEVICE
);
161 saa7146_pgtable_free(pci
, pt
);
171 void saa7146_vfree_destroy_pgtable(struct pci_dev
*pci
, void *mem
, struct saa7146_pgtable
*pt
)
173 pci_unmap_sg(pci
, pt
->slist
, pt
->nents
, PCI_DMA_FROMDEVICE
);
174 saa7146_pgtable_free(pci
, pt
);
180 void saa7146_pgtable_free(struct pci_dev
*pci
, struct saa7146_pgtable
*pt
)
184 pci_free_consistent(pci
, pt
->size
, pt
->cpu
, pt
->dma
);
188 int saa7146_pgtable_alloc(struct pci_dev
*pci
, struct saa7146_pgtable
*pt
)
193 cpu
= pci_alloc_consistent(pci
, PAGE_SIZE
, &dma_addr
);
197 pt
->size
= PAGE_SIZE
;
204 int saa7146_pgtable_build_single(struct pci_dev
*pci
, struct saa7146_pgtable
*pt
,
205 struct scatterlist
*list
, int sglen
)
212 BUG_ON(list
->offset
> PAGE_SIZE
);
214 /* if we have a user buffer, the first page may not be
215 aligned to a page boundary. */
216 pt
->offset
= list
->offset
;
219 for (i
= 0; i
< sglen
; i
++, list
++) {
221 printk("i:%d, adr:0x%08x, len:%d, offset:%d\n", i,sg_dma_address(list), sg_dma_len(list), list->offset);
223 for (p
= 0; p
* 4096 < list
->length
; p
++, ptr
++) {
224 *ptr
= cpu_to_le32(sg_dma_address(list
) + p
* 4096);
230 /* safety; fill the page table up with the last valid page */
232 for(i
=nr_pages
;i
<1024;i
++) {
238 printk("offset: %d\n",pt->offset);
240 printk("ptr1 %d: 0x%08x\n",i,ptr[i]);
246 /********************************************************************************/
247 /* interrupt handler */
248 static irqreturn_t
interrupt_hw(int irq
, void *dev_id
)
250 struct saa7146_dev
*dev
= dev_id
;
254 /* read out the interrupt status register */
255 ack_isr
= isr
= saa7146_read(dev
, ISR
);
257 /* is this our interrupt? */
259 /* nope, some other device */
263 if( 0 != (dev
->ext
)) {
264 if( 0 != (dev
->ext
->irq_mask
& isr
)) {
265 if( 0 != dev
->ext
->irq_func
) {
266 dev
->ext
->irq_func(dev
, &isr
);
268 isr
&= ~dev
->ext
->irq_mask
;
271 if (0 != (isr
& (MASK_27
))) {
272 DEB_INT(("irq: RPS0 (0x%08x).\n",isr
));
273 if( 0 != dev
->vv_data
&& 0 != dev
->vv_callback
) {
274 dev
->vv_callback(dev
,isr
);
278 if (0 != (isr
& (MASK_28
))) {
279 if( 0 != dev
->vv_data
&& 0 != dev
->vv_callback
) {
280 dev
->vv_callback(dev
,isr
);
284 if (0 != (isr
& (MASK_16
|MASK_17
))) {
285 SAA7146_IER_DISABLE(dev
, MASK_16
|MASK_17
);
286 /* only wake up if we expect something */
287 if (0 != dev
->i2c_op
) {
289 wake_up(&dev
->i2c_wq
);
291 u32 psr
= saa7146_read(dev
, PSR
);
292 u32 ssr
= saa7146_read(dev
, SSR
);
293 printk(KERN_WARNING
"%s: unexpected i2c irq: isr %08x psr %08x ssr %08x\n",
294 dev
->name
, isr
, psr
, ssr
);
296 isr
&= ~(MASK_16
|MASK_17
);
299 ERR(("warning: interrupt enabled, but not handled properly.(0x%08x)\n",isr
));
300 ERR(("disabling interrupt source(s)!\n"));
301 SAA7146_IER_DISABLE(dev
,isr
);
303 saa7146_write(dev
, ISR
, ack_isr
);
307 /*********************************************************************************/
308 /* configuration-functions */
310 static int saa7146_init_one(struct pci_dev
*pci
, const struct pci_device_id
*ent
)
312 struct saa7146_pci_extension_data
*pci_ext
= (struct saa7146_pci_extension_data
*)ent
->driver_data
;
313 struct saa7146_extension
*ext
= pci_ext
->ext
;
314 struct saa7146_dev
*dev
;
317 /* clear out mem for sure */
318 dev
= kzalloc(sizeof(struct saa7146_dev
), GFP_KERNEL
);
320 ERR(("out of memory.\n"));
324 DEB_EE(("pci:%p\n",pci
));
326 err
= pci_enable_device(pci
);
328 ERR(("pci_enable_device() failed.\n"));
332 /* enable bus-mastering */
337 /* get chip-revision; this is needed to enable bug-fixes */
338 err
= pci_read_config_dword(pci
, PCI_CLASS_REVISION
, &dev
->revision
);
340 ERR(("pci_read_config_dword() failed.\n"));
343 dev
->revision
&= 0xf;
345 /* remap the memory from virtual to physical adress */
347 err
= pci_request_region(pci
, 0, "saa7146");
351 dev
->mem
= ioremap(pci_resource_start(pci
, 0),
352 pci_resource_len(pci
, 0));
354 ERR(("ioremap() failed.\n"));
359 /* we don't do a master reset here anymore, it screws up
360 some boards that don't have an i2c-eeprom for configuration
363 saa7146_write(dev, MC1, MASK_31);
366 /* disable all irqs */
367 saa7146_write(dev
, IER
, 0);
369 /* shut down all dma transfers and rps tasks */
370 saa7146_write(dev
, MC1
, 0x30ff0000);
372 /* clear out any rps-signals pending */
373 saa7146_write(dev
, MC2
, 0xf8000000);
375 /* request an interrupt for the saa7146 */
376 err
= request_irq(pci
->irq
, interrupt_hw
, IRQF_SHARED
| IRQF_DISABLED
,
379 ERR(("request_irq() failed.\n"));
385 /* get memory for various stuff */
386 dev
->d_rps0
.cpu_addr
= pci_alloc_consistent(pci
, SAA7146_RPS_MEM
,
387 &dev
->d_rps0
.dma_handle
);
388 if (!dev
->d_rps0
.cpu_addr
)
390 memset(dev
->d_rps0
.cpu_addr
, 0x0, SAA7146_RPS_MEM
);
392 dev
->d_rps1
.cpu_addr
= pci_alloc_consistent(pci
, SAA7146_RPS_MEM
,
393 &dev
->d_rps1
.dma_handle
);
394 if (!dev
->d_rps1
.cpu_addr
)
396 memset(dev
->d_rps1
.cpu_addr
, 0x0, SAA7146_RPS_MEM
);
398 dev
->d_i2c
.cpu_addr
= pci_alloc_consistent(pci
, SAA7146_RPS_MEM
,
399 &dev
->d_i2c
.dma_handle
);
400 if (!dev
->d_i2c
.cpu_addr
)
402 memset(dev
->d_i2c
.cpu_addr
, 0x0, SAA7146_RPS_MEM
);
404 /* the rest + print status message */
406 /* create a nice device name */
407 sprintf(dev
->name
, "saa7146 (%d)", saa7146_num
);
409 INFO(("found saa7146 @ mem %p (revision %d, irq %d) (0x%04x,0x%04x).\n", dev
->mem
, dev
->revision
, pci
->irq
, pci
->subsystem_vendor
, pci
->subsystem_device
));
412 pci_set_drvdata(pci
, dev
);
414 mutex_init(&dev
->lock
);
415 spin_lock_init(&dev
->int_slock
);
416 spin_lock_init(&dev
->slock
);
418 mutex_init(&dev
->i2c_lock
);
420 dev
->module
= THIS_MODULE
;
421 init_waitqueue_head(&dev
->i2c_wq
);
423 /* set some sane pci arbitrition values */
424 saa7146_write(dev
, PCI_BT_V1
, 0x1c00101f);
426 /* TODO: use the status code of the callback */
430 if (ext
->probe
&& ext
->probe(dev
)) {
431 DEB_D(("ext->probe() failed for %p. skipping device.\n",dev
));
435 if (ext
->attach(dev
, pci_ext
)) {
436 DEB_D(("ext->attach() failed for %p. skipping device.\n",dev
));
440 INIT_LIST_HEAD(&dev
->item
);
441 list_add_tail(&dev
->item
,&saa7146_devices
);
449 pci_set_drvdata(pci
, NULL
);
451 pci_free_consistent(pci
, SAA7146_RPS_MEM
, dev
->d_i2c
.cpu_addr
,
452 dev
->d_i2c
.dma_handle
);
454 pci_free_consistent(pci
, SAA7146_RPS_MEM
, dev
->d_rps1
.cpu_addr
,
455 dev
->d_rps1
.dma_handle
);
457 pci_free_consistent(pci
, SAA7146_RPS_MEM
, dev
->d_rps0
.cpu_addr
,
458 dev
->d_rps0
.dma_handle
);
460 free_irq(pci
->irq
, (void *)dev
);
464 pci_release_region(pci
, 0);
466 pci_disable_device(pci
);
472 static void saa7146_remove_one(struct pci_dev
*pdev
)
474 struct saa7146_dev
* dev
= pci_get_drvdata(pdev
);
479 { dev
->d_i2c
.cpu_addr
, dev
->d_i2c
.dma_handle
},
480 { dev
->d_rps1
.cpu_addr
, dev
->d_rps1
.dma_handle
},
481 { dev
->d_rps0
.cpu_addr
, dev
->d_rps0
.dma_handle
},
485 DEB_EE(("dev:%p\n",dev
));
487 dev
->ext
->detach(dev
);
489 /* shut down all video dma transfers */
490 saa7146_write(dev
, MC1
, 0x00ff0000);
492 /* disable all irqs, release irq-routine */
493 saa7146_write(dev
, IER
, 0);
495 free_irq(pdev
->irq
, dev
);
497 for (p
= dev_map
; p
->addr
; p
++)
498 pci_free_consistent(pdev
, SAA7146_RPS_MEM
, p
->addr
, p
->dma
);
501 pci_release_region(pdev
, 0);
502 list_del(&dev
->item
);
503 pci_disable_device(pdev
);
509 /*********************************************************************************/
510 /* extension handling functions */
512 int saa7146_register_extension(struct saa7146_extension
* ext
)
514 DEB_EE(("ext:%p\n",ext
));
516 ext
->driver
.name
= ext
->name
;
517 ext
->driver
.id_table
= ext
->pci_tbl
;
518 ext
->driver
.probe
= saa7146_init_one
;
519 ext
->driver
.remove
= saa7146_remove_one
;
521 printk("saa7146: register extension '%s'.\n",ext
->name
);
522 return pci_register_driver(&ext
->driver
);
525 int saa7146_unregister_extension(struct saa7146_extension
* ext
)
527 DEB_EE(("ext:%p\n",ext
));
528 printk("saa7146: unregister extension '%s'.\n",ext
->name
);
529 pci_unregister_driver(&ext
->driver
);
533 EXPORT_SYMBOL_GPL(saa7146_register_extension
);
534 EXPORT_SYMBOL_GPL(saa7146_unregister_extension
);
536 /* misc functions used by extension modules */
537 EXPORT_SYMBOL_GPL(saa7146_pgtable_alloc
);
538 EXPORT_SYMBOL_GPL(saa7146_pgtable_free
);
539 EXPORT_SYMBOL_GPL(saa7146_pgtable_build_single
);
540 EXPORT_SYMBOL_GPL(saa7146_vmalloc_build_pgtable
);
541 EXPORT_SYMBOL_GPL(saa7146_vfree_destroy_pgtable
);
542 EXPORT_SYMBOL_GPL(saa7146_wait_for_debi_done
);
544 EXPORT_SYMBOL_GPL(saa7146_setgpio
);
546 EXPORT_SYMBOL_GPL(saa7146_i2c_adapter_prepare
);
548 EXPORT_SYMBOL_GPL(saa7146_debug
);
549 EXPORT_SYMBOL_GPL(saa7146_devices
);
550 EXPORT_SYMBOL_GPL(saa7146_devices_lock
);
552 MODULE_AUTHOR("Michael Hunold <michael@mihu.de>");
553 MODULE_DESCRIPTION("driver for generic saa7146-based hardware");
554 MODULE_LICENSE("GPL");