diff options
Diffstat (limited to 'drivers/media/video/cx23885/cx23885-core.c')
| -rw-r--r-- | drivers/media/video/cx23885/cx23885-core.c | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/drivers/media/video/cx23885/cx23885-core.c b/drivers/media/video/cx23885/cx23885-core.c index 9e4d37eb918..eb5e3412d39 100644 --- a/drivers/media/video/cx23885/cx23885-core.c +++ b/drivers/media/video/cx23885/cx23885-core.c @@ -1733,6 +1733,88 @@ out: return IRQ_RETVAL(handled); } +int encoder_on_portb(struct cx23885_dev *dev) +{ + return cx23885_boards[dev->board].portb == CX23885_MPEG_ENCODER; +} + +int encoder_on_portc(struct cx23885_dev *dev) +{ + return cx23885_boards[dev->board].portc == CX23885_MPEG_ENCODER; +} + +/* Mask represents 32 different GPIOs, GPIO's are split into multiple + * registers depending on the board configuration (and whether the + * 417 encoder (wi it's own GPIO's) are present. Each GPIO bit will + * be pushed into the correct hardware register, regardless of the + * physical location. Certain registers are shared so we sanity check + * and report errors if we think we're tampering with a GPIo that might + * be assigned to the encoder (and used for the host bus). + * + * GPIO 2 thru 0 - On the cx23885 bridge + * GPIO 18 thru 3 - On the cx23417 host bus interface + * GPIO 23 thru 19 - On the cx25840 a/v core + */ +void cx23885_gpio_set(struct cx23885_dev *dev, u32 mask) +{ + if (mask & 0x7) + cx_set(GP0_IO, mask & 0x7); + + if (mask & 0x0007fff8) { + if (encoder_on_portb(dev) || encoder_on_portc(dev)) + printk(KERN_ERR + "%s: Setting GPIO on encoder ports\n", + dev->name); + cx_set(MC417_RWD, (mask & 0x0007fff8) >> 3); + } + + /* TODO: 23-19 */ + if (mask & 0x00f80000) + printk(KERN_INFO "%s: Unsupported\n", dev->name); +} + +void cx23885_gpio_clear(struct cx23885_dev *dev, u32 mask) +{ + if (mask & 0x00000007) + cx_clear(GP0_IO, mask & 0x7); + + if (mask & 0x0007fff8) { + if (encoder_on_portb(dev) || encoder_on_portc(dev)) + printk(KERN_ERR + "%s: Clearing GPIO moving on encoder ports\n", + dev->name); + cx_clear(MC417_RWD, (mask & 0x7fff8) >> 3); + } + + /* TODO: 23-19 */ + if (mask & 0x00f80000) + printk(KERN_INFO "%s: Unsupported\n", dev->name); +} + +void cx23885_gpio_enable(struct cx23885_dev *dev, u32 mask, int asoutput) +{ + if ((mask & 0x00000007) && asoutput) + cx_set(GP0_IO, (mask & 0x7) << 16); + else if ((mask & 0x00000007) && !asoutput) + cx_clear(GP0_IO, (mask & 0x7) << 16); + + if (mask & 0x0007fff8) { + if (encoder_on_portb(dev) || encoder_on_portc(dev)) + printk(KERN_ERR + "%s: Enabling GPIO on encoder ports\n", + dev->name); + } + + /* MC417_OEN is active low for output, write 1 for an input */ + if ((mask & 0x0007fff8) && asoutput) + cx_clear(MC417_OEN, (mask & 0x7fff8) >> 3); + + else if ((mask & 0x0007fff8) && !asoutput) + cx_set(MC417_OEN, (mask & 0x7fff8) >> 3); + + /* TODO: 23-19 */ +} + static int __devinit cx23885_initdev(struct pci_dev *pci_dev, const struct pci_device_id *pci_id) { |