diff options
Diffstat (limited to 'drivers/media/video/cx23885/cx23885-ioctl.c')
| -rw-r--r-- | drivers/media/video/cx23885/cx23885-ioctl.c | 208 |
1 files changed, 208 insertions, 0 deletions
diff --git a/drivers/media/video/cx23885/cx23885-ioctl.c b/drivers/media/video/cx23885/cx23885-ioctl.c new file mode 100644 index 00000000000..dfb4627fb34 --- /dev/null +++ b/drivers/media/video/cx23885/cx23885-ioctl.c @@ -0,0 +1,208 @@ +/* + * Driver for the Conexant CX23885/7/8 PCIe bridge + * + * Various common ioctl() support functions + * + * Copyright (c) 2009 Andy Walls <awalls@radix.net> + * + * 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 "cx23885.h" +#include <media/v4l2-chip-ident.h> + +int cx23885_g_chip_ident(struct file *file, void *fh, + struct v4l2_dbg_chip_ident *chip) +{ + struct cx23885_dev *dev = ((struct cx23885_fh *)fh)->dev; + int err = 0; + u8 rev; + + chip->ident = V4L2_IDENT_NONE; + chip->revision = 0; + switch (chip->match.type) { + case V4L2_CHIP_MATCH_HOST: + switch (chip->match.addr) { + case 0: + rev = cx_read(RDR_CFG2) & 0xff; + switch (dev->pci->device) { + case 0x8852: + /* rev 0x04 could be '885 or '888. Pick '888. */ + if (rev == 0x04) + chip->ident = V4L2_IDENT_CX23888; + else + chip->ident = V4L2_IDENT_CX23885; + break; + case 0x8880: + if (rev == 0x0e || rev == 0x0f) + chip->ident = V4L2_IDENT_CX23887; + else + chip->ident = V4L2_IDENT_CX23888; + break; + default: + chip->ident = V4L2_IDENT_UNKNOWN; + break; + } + chip->revision = (dev->pci->device << 16) | (rev << 8) | + (dev->hwrevision & 0xff); + break; + case 1: + if (dev->v4l_device != NULL) { + chip->ident = V4L2_IDENT_CX23417; + chip->revision = 0; + } + break; + case 2: + /* + * The integrated IR controller on the CX23888 is + * host chip 2. It may not be used/initialized or sd_ir + * may be pointing at the cx25840 subdevice for the + * IR controller on the CX23885. Thus we find it + * without using the dev->sd_ir pointer. + */ + call_hw(dev, CX23885_HW_888_IR, core, g_chip_ident, + chip); + break; + default: + err = -EINVAL; /* per V4L2 spec */ + break; + } + break; + case V4L2_CHIP_MATCH_I2C_DRIVER: + /* If needed, returns V4L2_IDENT_AMBIGUOUS without extra work */ + call_all(dev, core, g_chip_ident, chip); + break; + case V4L2_CHIP_MATCH_I2C_ADDR: + /* + * We could return V4L2_IDENT_UNKNOWN, but we don't do the work + * to look if a chip is at the address with no driver. That's a + * dangerous thing to do with EEPROMs anyway. + */ + call_all(dev, core, g_chip_ident, chip); + break; + default: + err = -EINVAL; + break; + } + return err; +} + +#ifdef CONFIG_VIDEO_ADV_DEBUG +static int cx23885_g_host_register(struct cx23885_dev *dev, + struct v4l2_dbg_register *reg) +{ + if ((reg->reg & 0x3) != 0 || reg->reg >= pci_resource_len(dev->pci, 0)) + return -EINVAL; + + reg->size = 4; + reg->val = cx_read(reg->reg); + return 0; +} + +static int cx23417_g_register(struct cx23885_dev *dev, + struct v4l2_dbg_register *reg) +{ + u32 value; + + if (dev->v4l_device == NULL) + return -EINVAL; + + if ((reg->reg & 0x3) != 0 || reg->reg >= 0x10000) + return -EINVAL; + + if (mc417_register_read(dev, (u16) reg->reg, &value)) + return -EINVAL; /* V4L2 spec, but -EREMOTEIO really */ + + reg->size = 4; + reg->val = value; + return 0; +} + +int cx23885_g_register(struct file *file, void *fh, + struct v4l2_dbg_register *reg) +{ + struct cx23885_dev *dev = ((struct cx23885_fh *)fh)->dev; + + if (!capable(CAP_SYS_ADMIN)) + return -EPERM; + + if (reg->match.type == V4L2_CHIP_MATCH_HOST) { + switch (reg->match.addr) { + case 0: + return cx23885_g_host_register(dev, reg); + case 1: + return cx23417_g_register(dev, reg); + default: + break; + } + } + + /* FIXME - any error returns should not be ignored */ + call_all(dev, core, g_register, reg); + return 0; +} + +static int cx23885_s_host_register(struct cx23885_dev *dev, + struct v4l2_dbg_register *reg) +{ + if ((reg->reg & 0x3) != 0 || reg->reg >= pci_resource_len(dev->pci, 0)) + return -EINVAL; + + reg->size = 4; + cx_write(reg->reg, reg->val); + return 0; +} + +static int cx23417_s_register(struct cx23885_dev *dev, + struct v4l2_dbg_register *reg) +{ + if (dev->v4l_device == NULL) + return -EINVAL; + + if ((reg->reg & 0x3) != 0 || reg->reg >= 0x10000) + return -EINVAL; + + if (mc417_register_write(dev, (u16) reg->reg, (u32) reg->val)) + return -EINVAL; /* V4L2 spec, but -EREMOTEIO really */ + + reg->size = 4; + return 0; +} + +int cx23885_s_register(struct file *file, void *fh, + struct v4l2_dbg_register *reg) +{ + struct cx23885_dev *dev = ((struct cx23885_fh *)fh)->dev; + + if (!capable(CAP_SYS_ADMIN)) + return -EPERM; + + if (reg->match.type == V4L2_CHIP_MATCH_HOST) { + switch (reg->match.addr) { + case 0: + return cx23885_s_host_register(dev, reg); + case 1: + return cx23417_s_register(dev, reg); + default: + break; + } + } + + /* FIXME - any error returns should not be ignored */ + call_all(dev, core, s_register, reg); + return 0; +} +#endif |