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>
22 #include <linux/module.h>
24 LIST_HEAD(saa7146_devices
);
25 DEFINE_MUTEX(saa7146_devices_lock
);
27 static int saa7146_num
;
29 unsigned int saa7146_debug
;
31 module_param(saa7146_debug
, uint
, 0644);
32 MODULE_PARM_DESC(saa7146_debug
, "debug level (default: 0)");
35 static void dump_registers(struct saa7146_dev
* dev
)
39 INFO((" @ %li jiffies:\n",jiffies
));
40 for(i
= 0; i
<= 0x148; i
+=4) {
41 printk("0x%03x: 0x%08x\n",i
,saa7146_read(dev
,i
));
46 /****************************************************************************
47 * gpio and debi helper functions
48 ****************************************************************************/
50 void saa7146_setgpio(struct saa7146_dev
*dev
, int port
, u32 data
)
56 value
= saa7146_read(dev
, GPIO_CTRL
);
57 value
&= ~(0xff << (8*port
));
58 value
|= (data
<< (8*port
));
59 saa7146_write(dev
, GPIO_CTRL
, value
);
62 /* This DEBI code is based on the saa7146 Stradis driver by Nathan Laredo */
63 static inline int saa7146_wait_for_debi_done_sleep(struct saa7146_dev
*dev
,
64 unsigned long us1
, unsigned long us2
)
66 unsigned long timeout
;
69 /* wait for registers to be programmed */
70 timeout
= jiffies
+ usecs_to_jiffies(us1
);
72 err
= time_after(jiffies
, timeout
);
73 if (saa7146_read(dev
, MC2
) & 2)
76 printk(KERN_ERR
"%s: %s timed out while waiting for "
77 "registers getting programmed\n",
84 /* wait for transfer to complete */
85 timeout
= jiffies
+ usecs_to_jiffies(us2
);
87 err
= time_after(jiffies
, timeout
);
88 if (!(saa7146_read(dev
, PSR
) & SPCI_DEBI_S
))
90 saa7146_read(dev
, MC2
);
92 DEB_S(("%s: %s timed out while waiting for transfer "
93 "completion\n", dev
->name
, __func__
));
102 static inline int saa7146_wait_for_debi_done_busyloop(struct saa7146_dev
*dev
,
103 unsigned long us1
, unsigned long us2
)
107 /* wait for registers to be programmed */
110 if (saa7146_read(dev
, MC2
) & 2)
113 printk(KERN_ERR
"%s: %s timed out while waiting for "
114 "registers getting programmed\n",
115 dev
->name
, __func__
);
121 /* wait for transfer to complete */
124 if (!(saa7146_read(dev
, PSR
) & SPCI_DEBI_S
))
126 saa7146_read(dev
, MC2
);
128 DEB_S(("%s: %s timed out while waiting for transfer "
129 "completion\n", dev
->name
, __func__
));
138 int saa7146_wait_for_debi_done(struct saa7146_dev
*dev
, int nobusyloop
)
141 return saa7146_wait_for_debi_done_sleep(dev
, 50000, 250000);
143 return saa7146_wait_for_debi_done_busyloop(dev
, 50000, 250000);
146 /****************************************************************************
147 * general helper functions
148 ****************************************************************************/
150 /* this is videobuf_vmalloc_to_sg() from videobuf-dma-sg.c
151 make sure virt has been allocated with vmalloc_32(), otherwise the BUG()
152 may be triggered on highmem machines */
153 static struct scatterlist
* vmalloc_to_sg(unsigned char *virt
, int nr_pages
)
155 struct scatterlist
*sglist
;
159 sglist
= kcalloc(nr_pages
, sizeof(struct scatterlist
), GFP_KERNEL
);
162 sg_init_table(sglist
, nr_pages
);
163 for (i
= 0; i
< nr_pages
; i
++, virt
+= PAGE_SIZE
) {
164 pg
= vmalloc_to_page(virt
);
167 BUG_ON(PageHighMem(pg
));
168 sg_set_page(&sglist
[i
], pg
, PAGE_SIZE
, 0);
177 /********************************************************************************/
178 /* common page table functions */
180 void *saa7146_vmalloc_build_pgtable(struct pci_dev
*pci
, long length
, struct saa7146_pgtable
*pt
)
182 int pages
= (length
+PAGE_SIZE
-1)/PAGE_SIZE
;
183 void *mem
= vmalloc_32(length
);
189 if (!(pt
->slist
= vmalloc_to_sg(mem
, pages
)))
192 if (saa7146_pgtable_alloc(pci
, pt
))
196 slen
= pci_map_sg(pci
,pt
->slist
,pt
->nents
,PCI_DMA_FROMDEVICE
);
198 goto err_free_pgtable
;
200 if (0 != saa7146_pgtable_build_single(pci
, pt
, pt
->slist
, slen
))
206 pci_unmap_sg(pci
, pt
->slist
, pt
->nents
, PCI_DMA_FROMDEVICE
);
208 saa7146_pgtable_free(pci
, pt
);
218 void saa7146_vfree_destroy_pgtable(struct pci_dev
*pci
, void *mem
, struct saa7146_pgtable
*pt
)
220 pci_unmap_sg(pci
, pt
->slist
, pt
->nents
, PCI_DMA_FROMDEVICE
);
221 saa7146_pgtable_free(pci
, pt
);
227 void saa7146_pgtable_free(struct pci_dev
*pci
, struct saa7146_pgtable
*pt
)
231 pci_free_consistent(pci
, pt
->size
, pt
->cpu
, pt
->dma
);
235 int saa7146_pgtable_alloc(struct pci_dev
*pci
, struct saa7146_pgtable
*pt
)
238 dma_addr_t dma_addr
= 0;
240 cpu
= pci_alloc_consistent(pci
, PAGE_SIZE
, &dma_addr
);
244 pt
->size
= PAGE_SIZE
;
251 int saa7146_pgtable_build_single(struct pci_dev
*pci
, struct saa7146_pgtable
*pt
,
252 struct scatterlist
*list
, int sglen
)
259 BUG_ON(list
->offset
> PAGE_SIZE
);
261 /* if we have a user buffer, the first page may not be
262 aligned to a page boundary. */
263 pt
->offset
= list
->offset
;
266 for (i
= 0; i
< sglen
; i
++, list
++) {
268 printk("i:%d, adr:0x%08x, len:%d, offset:%d\n", i,sg_dma_address(list), sg_dma_len(list), list->offset);
270 for (p
= 0; p
* 4096 < list
->length
; p
++, ptr
++) {
271 *ptr
= cpu_to_le32(sg_dma_address(list
) + p
* 4096);
277 /* safety; fill the page table up with the last valid page */
279 for(i
=nr_pages
;i
<1024;i
++) {
285 printk("offset: %d\n",pt->offset);
287 printk("ptr1 %d: 0x%08x\n",i,ptr[i]);
293 /********************************************************************************/
294 /* interrupt handler */
295 static irqreturn_t
interrupt_hw(int irq
, void *dev_id
)
297 struct saa7146_dev
*dev
= dev_id
;
301 /* read out the interrupt status register */
302 ack_isr
= isr
= saa7146_read(dev
, ISR
);
304 /* is this our interrupt? */
306 /* nope, some other device */
311 if (dev
->ext
->irq_mask
& isr
) {
312 if (dev
->ext
->irq_func
)
313 dev
->ext
->irq_func(dev
, &isr
);
314 isr
&= ~dev
->ext
->irq_mask
;
317 if (0 != (isr
& (MASK_27
))) {
318 DEB_INT(("irq: RPS0 (0x%08x).\n",isr
));
319 if (dev
->vv_data
&& dev
->vv_callback
)
320 dev
->vv_callback(dev
,isr
);
323 if (0 != (isr
& (MASK_28
))) {
324 if (dev
->vv_data
&& dev
->vv_callback
)
325 dev
->vv_callback(dev
,isr
);
328 if (0 != (isr
& (MASK_16
|MASK_17
))) {
329 SAA7146_IER_DISABLE(dev
, MASK_16
|MASK_17
);
330 /* only wake up if we expect something */
331 if (0 != dev
->i2c_op
) {
333 wake_up(&dev
->i2c_wq
);
335 u32 psr
= saa7146_read(dev
, PSR
);
336 u32 ssr
= saa7146_read(dev
, SSR
);
337 printk(KERN_WARNING
"%s: unexpected i2c irq: isr %08x psr %08x ssr %08x\n",
338 dev
->name
, isr
, psr
, ssr
);
340 isr
&= ~(MASK_16
|MASK_17
);
343 ERR(("warning: interrupt enabled, but not handled properly.(0x%08x)\n",isr
));
344 ERR(("disabling interrupt source(s)!\n"));
345 SAA7146_IER_DISABLE(dev
,isr
);
347 saa7146_write(dev
, ISR
, ack_isr
);
351 /*********************************************************************************/
352 /* configuration-functions */
354 static int saa7146_init_one(struct pci_dev
*pci
, const struct pci_device_id
*ent
)
356 struct saa7146_pci_extension_data
*pci_ext
= (struct saa7146_pci_extension_data
*)ent
->driver_data
;
357 struct saa7146_extension
*ext
= pci_ext
->ext
;
358 struct saa7146_dev
*dev
;
361 /* clear out mem for sure */
362 dev
= kzalloc(sizeof(struct saa7146_dev
), GFP_KERNEL
);
364 ERR(("out of memory.\n"));
368 DEB_EE(("pci:%p\n",pci
));
370 err
= pci_enable_device(pci
);
372 ERR(("pci_enable_device() failed.\n"));
376 /* enable bus-mastering */
381 /* get chip-revision; this is needed to enable bug-fixes */
382 dev
->revision
= pci
->revision
;
384 /* remap the memory from virtual to physical address */
386 err
= pci_request_region(pci
, 0, "saa7146");
390 dev
->mem
= ioremap(pci_resource_start(pci
, 0),
391 pci_resource_len(pci
, 0));
393 ERR(("ioremap() failed.\n"));
398 /* we don't do a master reset here anymore, it screws up
399 some boards that don't have an i2c-eeprom for configuration
402 saa7146_write(dev, MC1, MASK_31);
405 /* disable all irqs */
406 saa7146_write(dev
, IER
, 0);
408 /* shut down all dma transfers and rps tasks */
409 saa7146_write(dev
, MC1
, 0x30ff0000);
411 /* clear out any rps-signals pending */
412 saa7146_write(dev
, MC2
, 0xf8000000);
414 /* request an interrupt for the saa7146 */
415 err
= request_irq(pci
->irq
, interrupt_hw
, IRQF_SHARED
| IRQF_DISABLED
,
418 ERR(("request_irq() failed.\n"));
424 /* get memory for various stuff */
425 dev
->d_rps0
.cpu_addr
= pci_alloc_consistent(pci
, SAA7146_RPS_MEM
,
426 &dev
->d_rps0
.dma_handle
);
427 if (!dev
->d_rps0
.cpu_addr
)
429 memset(dev
->d_rps0
.cpu_addr
, 0x0, SAA7146_RPS_MEM
);
431 dev
->d_rps1
.cpu_addr
= pci_alloc_consistent(pci
, SAA7146_RPS_MEM
,
432 &dev
->d_rps1
.dma_handle
);
433 if (!dev
->d_rps1
.cpu_addr
)
435 memset(dev
->d_rps1
.cpu_addr
, 0x0, SAA7146_RPS_MEM
);
437 dev
->d_i2c
.cpu_addr
= pci_alloc_consistent(pci
, SAA7146_RPS_MEM
,
438 &dev
->d_i2c
.dma_handle
);
439 if (!dev
->d_i2c
.cpu_addr
)
441 memset(dev
->d_i2c
.cpu_addr
, 0x0, SAA7146_RPS_MEM
);
443 /* the rest + print status message */
445 /* create a nice device name */
446 sprintf(dev
->name
, "saa7146 (%d)", saa7146_num
);
448 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
));
451 mutex_init(&dev
->v4l2_lock
);
452 spin_lock_init(&dev
->int_slock
);
453 spin_lock_init(&dev
->slock
);
455 mutex_init(&dev
->i2c_lock
);
457 dev
->module
= THIS_MODULE
;
458 init_waitqueue_head(&dev
->i2c_wq
);
460 /* set some sane pci arbitrition values */
461 saa7146_write(dev
, PCI_BT_V1
, 0x1c00101f);
463 /* TODO: use the status code of the callback */
467 if (ext
->probe
&& ext
->probe(dev
)) {
468 DEB_D(("ext->probe() failed for %p. skipping device.\n",dev
));
472 if (ext
->attach(dev
, pci_ext
)) {
473 DEB_D(("ext->attach() failed for %p. skipping device.\n",dev
));
476 /* V4L extensions will set the pci drvdata to the v4l2_device in the
477 attach() above. So for those cards that do not use V4L we have to
478 set it explicitly. */
479 pci_set_drvdata(pci
, &dev
->v4l2_dev
);
481 INIT_LIST_HEAD(&dev
->item
);
482 list_add_tail(&dev
->item
,&saa7146_devices
);
490 pci_free_consistent(pci
, SAA7146_RPS_MEM
, dev
->d_i2c
.cpu_addr
,
491 dev
->d_i2c
.dma_handle
);
493 pci_free_consistent(pci
, SAA7146_RPS_MEM
, dev
->d_rps1
.cpu_addr
,
494 dev
->d_rps1
.dma_handle
);
496 pci_free_consistent(pci
, SAA7146_RPS_MEM
, dev
->d_rps0
.cpu_addr
,
497 dev
->d_rps0
.dma_handle
);
499 free_irq(pci
->irq
, (void *)dev
);
503 pci_release_region(pci
, 0);
505 pci_disable_device(pci
);
511 static void saa7146_remove_one(struct pci_dev
*pdev
)
513 struct v4l2_device
*v4l2_dev
= pci_get_drvdata(pdev
);
514 struct saa7146_dev
*dev
= to_saa7146_dev(v4l2_dev
);
519 { dev
->d_i2c
.cpu_addr
, dev
->d_i2c
.dma_handle
},
520 { dev
->d_rps1
.cpu_addr
, dev
->d_rps1
.dma_handle
},
521 { dev
->d_rps0
.cpu_addr
, dev
->d_rps0
.dma_handle
},
525 DEB_EE(("dev:%p\n",dev
));
527 dev
->ext
->detach(dev
);
528 /* Zero the PCI drvdata after use. */
529 pci_set_drvdata(pdev
, NULL
);
531 /* shut down all video dma transfers */
532 saa7146_write(dev
, MC1
, 0x00ff0000);
534 /* disable all irqs, release irq-routine */
535 saa7146_write(dev
, IER
, 0);
537 free_irq(pdev
->irq
, dev
);
539 for (p
= dev_map
; p
->addr
; p
++)
540 pci_free_consistent(pdev
, SAA7146_RPS_MEM
, p
->addr
, p
->dma
);
543 pci_release_region(pdev
, 0);
544 list_del(&dev
->item
);
545 pci_disable_device(pdev
);
551 /*********************************************************************************/
552 /* extension handling functions */
554 int saa7146_register_extension(struct saa7146_extension
* ext
)
556 DEB_EE(("ext:%p\n",ext
));
558 ext
->driver
.name
= ext
->name
;
559 ext
->driver
.id_table
= ext
->pci_tbl
;
560 ext
->driver
.probe
= saa7146_init_one
;
561 ext
->driver
.remove
= saa7146_remove_one
;
563 printk("saa7146: register extension '%s'.\n",ext
->name
);
564 return pci_register_driver(&ext
->driver
);
567 int saa7146_unregister_extension(struct saa7146_extension
* ext
)
569 DEB_EE(("ext:%p\n",ext
));
570 printk("saa7146: unregister extension '%s'.\n",ext
->name
);
571 pci_unregister_driver(&ext
->driver
);
575 EXPORT_SYMBOL_GPL(saa7146_register_extension
);
576 EXPORT_SYMBOL_GPL(saa7146_unregister_extension
);
578 /* misc functions used by extension modules */
579 EXPORT_SYMBOL_GPL(saa7146_pgtable_alloc
);
580 EXPORT_SYMBOL_GPL(saa7146_pgtable_free
);
581 EXPORT_SYMBOL_GPL(saa7146_pgtable_build_single
);
582 EXPORT_SYMBOL_GPL(saa7146_vmalloc_build_pgtable
);
583 EXPORT_SYMBOL_GPL(saa7146_vfree_destroy_pgtable
);
584 EXPORT_SYMBOL_GPL(saa7146_wait_for_debi_done
);
586 EXPORT_SYMBOL_GPL(saa7146_setgpio
);
588 EXPORT_SYMBOL_GPL(saa7146_i2c_adapter_prepare
);
590 EXPORT_SYMBOL_GPL(saa7146_debug
);
591 EXPORT_SYMBOL_GPL(saa7146_devices
);
592 EXPORT_SYMBOL_GPL(saa7146_devices_lock
);
594 MODULE_AUTHOR("Michael Hunold <michael@mihu.de>");
595 MODULE_DESCRIPTION("driver for generic saa7146-based hardware");
596 MODULE_LICENSE("GPL");