diff options
Diffstat (limited to 'drivers/media/common/saa7146_core.c')
| -rw-r--r-- | drivers/media/common/saa7146_core.c | 548 |
1 files changed, 0 insertions, 548 deletions
diff --git a/drivers/media/common/saa7146_core.c b/drivers/media/common/saa7146_core.c deleted file mode 100644 index 206cc2f61f2..00000000000 --- a/drivers/media/common/saa7146_core.c +++ /dev/null @@ -1,548 +0,0 @@ -/* - saa7146.o - driver for generic saa7146-based hardware - - Copyright (C) 1998-2003 Michael Hunold <michael@mihu.de> - - 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 - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. -*/ - -#include <media/saa7146.h> - -LIST_HEAD(saa7146_devices); -DECLARE_MUTEX(saa7146_devices_lock); - -static int saa7146_num; - -unsigned int saa7146_debug; - -module_param(saa7146_debug, int, 0644); -MODULE_PARM_DESC(saa7146_debug, "debug level (default: 0)"); - -#if 0 -static void dump_registers(struct saa7146_dev* dev) -{ - int i = 0; - - INFO((" @ %li jiffies:\n",jiffies)); - for(i = 0; i <= 0x148; i+=4) { - printk("0x%03x: 0x%08x\n",i,saa7146_read(dev,i)); - } -} -#endif - -/**************************************************************************** - * gpio and debi helper functions - ****************************************************************************/ - -void saa7146_setgpio(struct saa7146_dev *dev, int port, u32 data) -{ - u32 value = 0; - - BUG_ON(port > 3); - - value = saa7146_read(dev, GPIO_CTRL); - value &= ~(0xff << (8*port)); - value |= (data << (8*port)); - saa7146_write(dev, GPIO_CTRL, value); -} - -/* This DEBI code is based on the saa7146 Stradis driver by Nathan Laredo */ -int saa7146_wait_for_debi_done(struct saa7146_dev *dev, int nobusyloop) -{ - unsigned long start; - int err; - - /* wait for registers to be programmed */ - start = jiffies; - while (1) { - err = time_after(jiffies, start + HZ/20); - if (saa7146_read(dev, MC2) & 2) - break; - if (err) { - DEB_S(("timed out while waiting for registers getting programmed\n")); - return -ETIMEDOUT; - } - if (nobusyloop) - msleep(1); - } - - /* wait for transfer to complete */ - start = jiffies; - while (1) { - err = time_after(jiffies, start + HZ/4); - if (!(saa7146_read(dev, PSR) & SPCI_DEBI_S)) - break; - saa7146_read(dev, MC2); - if (err) { - DEB_S(("timed out while waiting for transfer completion\n")); - return -ETIMEDOUT; - } - if (nobusyloop) - msleep(1); - } - - return 0; -} - -/**************************************************************************** - * general helper functions - ****************************************************************************/ - -/* this is videobuf_vmalloc_to_sg() from video-buf.c - make sure virt has been allocated with vmalloc_32(), otherwise the BUG() - may be triggered on highmem machines */ -static struct scatterlist* vmalloc_to_sg(unsigned char *virt, int nr_pages) -{ - struct scatterlist *sglist; - struct page *pg; - int i; - - sglist = kmalloc(sizeof(struct scatterlist)*nr_pages, GFP_KERNEL); - if (NULL == sglist) - return NULL; - memset(sglist,0,sizeof(struct scatterlist)*nr_pages); - for (i = 0; i < nr_pages; i++, virt += PAGE_SIZE) { - pg = vmalloc_to_page(virt); - if (NULL == pg) - goto err; - if (PageHighMem(pg)) - BUG(); - sglist[i].page = pg; - sglist[i].length = PAGE_SIZE; - } - return sglist; - - err: - kfree(sglist); - return NULL; -} - -/********************************************************************************/ -/* common page table functions */ - -char *saa7146_vmalloc_build_pgtable(struct pci_dev *pci, long length, struct saa7146_pgtable *pt) -{ - int pages = (length+PAGE_SIZE-1)/PAGE_SIZE; - char *mem = vmalloc_32(length); - int slen = 0; - - if (NULL == mem) { - return NULL; - } - - if (!(pt->slist = vmalloc_to_sg(mem, pages))) { - vfree(mem); - return NULL; - } - - if (saa7146_pgtable_alloc(pci, pt)) { - kfree(pt->slist); - pt->slist = NULL; - vfree(mem); - return NULL; - } - - slen = pci_map_sg(pci,pt->slist,pages,PCI_DMA_FROMDEVICE); - if (0 != saa7146_pgtable_build_single(pci, pt, pt->slist, slen)) { - return NULL; - } - - return mem; -} - -void saa7146_pgtable_free(struct pci_dev *pci, struct saa7146_pgtable *pt) -{ - if (NULL == pt->cpu) - return; - pci_free_consistent(pci, pt->size, pt->cpu, pt->dma); - pt->cpu = NULL; - kfree(pt->slist); - pt->slist = NULL; -} - -int saa7146_pgtable_alloc(struct pci_dev *pci, struct saa7146_pgtable *pt) -{ - u32 *cpu; - dma_addr_t dma_addr; - - cpu = pci_alloc_consistent(pci, PAGE_SIZE, &dma_addr); - if (NULL == cpu) { - return -ENOMEM; - } - pt->size = PAGE_SIZE; - pt->cpu = cpu; - pt->dma = dma_addr; - - return 0; -} - -int saa7146_pgtable_build_single(struct pci_dev *pci, struct saa7146_pgtable *pt, - struct scatterlist *list, int sglen ) -{ - u32 *ptr, fill; - int nr_pages = 0; - int i,p; - - BUG_ON(0 == sglen); - BUG_ON(list->offset > PAGE_SIZE); - - /* if we have a user buffer, the first page may not be - aligned to a page boundary. */ - pt->offset = list->offset; - - ptr = pt->cpu; - for (i = 0; i < sglen; i++, list++) { -/* - printk("i:%d, adr:0x%08x, len:%d, offset:%d\n", i,sg_dma_address(list), sg_dma_len(list), list->offset); -*/ - for (p = 0; p * 4096 < list->length; p++, ptr++) { - *ptr = cpu_to_le32(sg_dma_address(list) + p * 4096); - nr_pages++; - } - } - - - /* safety; fill the page table up with the last valid page */ - fill = *(ptr-1); - for(i=nr_pages;i<1024;i++) { - *ptr++ = fill; - } - -/* - ptr = pt->cpu; - printk("offset: %d\n",pt->offset); - for(i=0;i<5;i++) { - printk("ptr1 %d: 0x%08x\n",i,ptr[i]); - } -*/ - return 0; -} - -/********************************************************************************/ -/* interrupt handler */ -static irqreturn_t interrupt_hw(int irq, void *dev_id, struct pt_regs *regs) -{ - struct saa7146_dev *dev = dev_id; - u32 isr = 0; - - /* read out the interrupt status register */ - isr = saa7146_read(dev, ISR); - - /* is this our interrupt? */ - if ( 0 == isr ) { - /* nope, some other device */ - return IRQ_NONE; - } - - saa7146_write(dev, ISR, isr); - - if( 0 != (dev->ext)) { - if( 0 != (dev->ext->irq_mask & isr )) { - if( 0 != dev->ext->irq_func ) { - dev->ext->irq_func(dev, &isr); - } - isr &= ~dev->ext->irq_mask; - } - } - if (0 != (isr & (MASK_27))) { - DEB_INT(("irq: RPS0 (0x%08x).\n",isr)); - if( 0 != dev->vv_data && 0 != dev->vv_callback) { - dev->vv_callback(dev,isr); - } - isr &= ~MASK_27; - } - if (0 != (isr & (MASK_28))) { - if( 0 != dev->vv_data && 0 != dev->vv_callback) { - dev->vv_callback(dev,isr); - } - isr &= ~MASK_28; - } - if (0 != (isr & (MASK_16|MASK_17))) { - u32 status = saa7146_read(dev, I2C_STATUS); - if( (0x3 == (status & 0x3)) || (0 == (status & 0x1)) ) { - SAA7146_IER_DISABLE(dev, MASK_16|MASK_17); - /* only wake up if we expect something */ - if( 0 != dev->i2c_op ) { - u32 psr = (saa7146_read(dev, PSR) >> 16) & 0x2; - u32 ssr = (saa7146_read(dev, SSR) >> 17) & 0x1f; - DEB_I2C(("irq: i2c, status: 0x%08x, psr:0x%02x, ssr:0x%02x).\n",status,psr,ssr)); - dev->i2c_op = 0; - wake_up(&dev->i2c_wq); - } else { - DEB_I2C(("unexpected irq: i2c, status: 0x%08x, isr %#x\n",status, isr)); - } - } else { - DEB_I2C(("unhandled irq: i2c, status: 0x%08x, isr %#x\n",status, isr)); - } - isr &= ~(MASK_16|MASK_17); - } - if( 0 != isr ) { - ERR(("warning: interrupt enabled, but not handled properly.(0x%08x)\n",isr)); - ERR(("disabling interrupt source(s)!\n")); - SAA7146_IER_DISABLE(dev,isr); - } - return IRQ_HANDLED; -} - -/*********************************************************************************/ -/* configuration-functions */ - -static int saa7146_init_one(struct pci_dev *pci, const struct pci_device_id *ent) -{ - struct saa7146_pci_extension_data *pci_ext = (struct saa7146_pci_extension_data *)ent->driver_data; - struct saa7146_extension *ext = pci_ext->ext; - struct saa7146_dev *dev; - int err = -ENOMEM; - - dev = kmalloc(sizeof(struct saa7146_dev), GFP_KERNEL); - if (!dev) { - ERR(("out of memory.\n")); - goto out; - } - - /* clear out mem for sure */ - memset(dev, 0x0, sizeof(struct saa7146_dev)); - - DEB_EE(("pci:%p\n",pci)); - - err = pci_enable_device(pci); - if (err < 0) { - ERR(("pci_enable_device() failed.\n")); - goto err_free; - } - - /* enable bus-mastering */ - pci_set_master(pci); - - dev->pci = pci; - - /* get chip-revision; this is needed to enable bug-fixes */ - err = pci_read_config_dword(pci, PCI_CLASS_REVISION, &dev->revision); - if (err < 0) { - ERR(("pci_read_config_dword() failed.\n")); - goto err_disable; - } - dev->revision &= 0xf; - - /* remap the memory from virtual to physical adress */ - - err = pci_request_region(pci, 0, "saa7146"); - if (err < 0) - goto err_disable; - - dev->mem = ioremap(pci_resource_start(pci, 0), - pci_resource_len(pci, 0)); - if (!dev->mem) { - ERR(("ioremap() failed.\n")); - err = -ENODEV; - goto err_release; - } - - /* we don't do a master reset here anymore, it screws up - some boards that don't have an i2c-eeprom for configuration - values */ -/* - saa7146_write(dev, MC1, MASK_31); -*/ - - /* disable all irqs */ - saa7146_write(dev, IER, 0); - - /* shut down all dma transfers and rps tasks */ - saa7146_write(dev, MC1, 0x30ff0000); - - /* clear out any rps-signals pending */ - saa7146_write(dev, MC2, 0xf8000000); - - /* request an interrupt for the saa7146 */ - err = request_irq(pci->irq, interrupt_hw, SA_SHIRQ | SA_INTERRUPT, - dev->name, dev); - if (err < 0) { - ERR(("request_irq() failed.\n")); - goto err_unmap; - } - - err = -ENOMEM; - - /* get memory for various stuff */ - dev->d_rps0.cpu_addr = pci_alloc_consistent(pci, SAA7146_RPS_MEM, - &dev->d_rps0.dma_handle); - if (!dev->d_rps0.cpu_addr) - goto err_free_irq; - memset(dev->d_rps0.cpu_addr, 0x0, SAA7146_RPS_MEM); - - dev->d_rps1.cpu_addr = pci_alloc_consistent(pci, SAA7146_RPS_MEM, - &dev->d_rps1.dma_handle); - if (!dev->d_rps1.cpu_addr) - goto err_free_rps0; - memset(dev->d_rps1.cpu_addr, 0x0, SAA7146_RPS_MEM); - - dev->d_i2c.cpu_addr = pci_alloc_consistent(pci, SAA7146_RPS_MEM, - &dev->d_i2c.dma_handle); - if (!dev->d_i2c.cpu_addr) - goto err_free_rps1; - memset(dev->d_i2c.cpu_addr, 0x0, SAA7146_RPS_MEM); - - /* the rest + print status message */ - - /* create a nice device name */ - sprintf(dev->name, "saa7146 (%d)", saa7146_num); - - 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)); - dev->ext = ext; - - pci_set_drvdata(pci, dev); - - init_MUTEX(&dev->lock); - spin_lock_init(&dev->int_slock); - spin_lock_init(&dev->slock); - - init_MUTEX(&dev->i2c_lock); - - dev->module = THIS_MODULE; - init_waitqueue_head(&dev->i2c_wq); - - /* set some sane pci arbitrition values */ - saa7146_write(dev, PCI_BT_V1, 0x1c00101f); - - /* TODO: use the status code of the callback */ - - err = -ENODEV; - - if (ext->probe && ext->probe(dev)) { - DEB_D(("ext->probe() failed for %p. skipping device.\n",dev)); - goto err_free_i2c; - } - - if (ext->attach(dev, pci_ext)) { - DEB_D(("ext->attach() failed for %p. skipping device.\n",dev)); - goto err_unprobe; - } - - INIT_LIST_HEAD(&dev->item); - list_add_tail(&dev->item,&saa7146_devices); - saa7146_num++; - - err = 0; -out: - return err; - -err_unprobe: - pci_set_drvdata(pci, NULL); -err_free_i2c: - pci_free_consistent(pci, SAA7146_RPS_MEM, dev->d_i2c.cpu_addr, - dev->d_i2c.dma_handle); -err_free_rps1: - pci_free_consistent(pci, SAA7146_RPS_MEM, dev->d_rps1.cpu_addr, - dev->d_rps1.dma_handle); -err_free_rps0: - pci_free_consistent(pci, SAA7146_RPS_MEM, dev->d_rps0.cpu_addr, - dev->d_rps0.dma_handle); -err_free_irq: - free_irq(pci->irq, (void *)dev); -err_unmap: - iounmap(dev->mem); -err_release: - pci_release_region(pci, 0); -err_disable: - pci_disable_device(pci); -err_free: - kfree(dev); - goto out; -} - -static void saa7146_remove_one(struct pci_dev *pdev) -{ - struct saa7146_dev* dev = pci_get_drvdata(pdev); - struct { - void *addr; - dma_addr_t dma; - } dev_map[] = { - { dev->d_i2c.cpu_addr, dev->d_i2c.dma_handle }, - { dev->d_rps1.cpu_addr, dev->d_rps1.dma_handle }, - { dev->d_rps0.cpu_addr, dev->d_rps0.dma_handle }, - { NULL, 0 } - }, *p; - - DEB_EE(("dev:%p\n",dev)); - - dev->ext->detach(dev); - - /* shut down all video dma transfers */ - saa7146_write(dev, MC1, 0x00ff0000); - - /* disable all irqs, release irq-routine */ - saa7146_write(dev, IER, 0); - - free_irq(pdev->irq, dev); - - for (p = dev_map; p->addr; p++) - pci_free_consistent(pdev, SAA7146_RPS_MEM, p->addr, p->dma); - - iounmap(dev->mem); - pci_release_region(pdev, 0); - list_del(&dev->item); - pci_disable_device(pdev); - kfree(dev); - - saa7146_num--; -} - -/*********************************************************************************/ -/* extension handling functions */ - -int saa7146_register_extension(struct saa7146_extension* ext) -{ - DEB_EE(("ext:%p\n",ext)); - - ext->driver.name = ext->name; - ext->driver.id_table = ext->pci_tbl; - ext->driver.probe = saa7146_init_one; - ext->driver.remove = saa7146_remove_one; - - printk("saa7146: register extension '%s'.\n",ext->name); - return pci_register_driver(&ext->driver); -} - -int saa7146_unregister_extension(struct saa7146_extension* ext) -{ - DEB_EE(("ext:%p\n",ext)); - printk("saa7146: unregister extension '%s'.\n",ext->name); - pci_unregister_driver(&ext->driver); - return 0; -} - -EXPORT_SYMBOL_GPL(saa7146_register_extension); -EXPORT_SYMBOL_GPL(saa7146_unregister_extension); - -/* misc functions used by extension modules */ -EXPORT_SYMBOL_GPL(saa7146_pgtable_alloc); -EXPORT_SYMBOL_GPL(saa7146_pgtable_free); -EXPORT_SYMBOL_GPL(saa7146_pgtable_build_single); -EXPORT_SYMBOL_GPL(saa7146_vmalloc_build_pgtable); -EXPORT_SYMBOL_GPL(saa7146_wait_for_debi_done); - -EXPORT_SYMBOL_GPL(saa7146_setgpio); - -EXPORT_SYMBOL_GPL(saa7146_i2c_transfer); -EXPORT_SYMBOL_GPL(saa7146_i2c_adapter_prepare); - -EXPORT_SYMBOL_GPL(saa7146_debug); -EXPORT_SYMBOL_GPL(saa7146_devices); -EXPORT_SYMBOL_GPL(saa7146_devices_lock); - -MODULE_AUTHOR("Michael Hunold <michael@mihu.de>"); -MODULE_DESCRIPTION("driver for generic saa7146-based hardware"); -MODULE_LICENSE("GPL"); |