![Andy Walls](/assets/img/avatar_default.png)
This change adds a skeletal implementation of a v4l2_subdevice to provide encapsulation and abstraction of the CX23888's integrated consumer infrared controller. This change also instantiates the cx23888_ir subdev for the HVR-1850 which has IR hardware physically wired up to a CX23888. The cx23888_ir subdev code is being written with long-term objectives to: 1. port it to the cx25840 module for the CX2584x, CX2583x, CX23885, & CX231xx IR controllers 2. possibly port it to the cx18 module for the CX23418 IR controller 3. have the IR subdevice accessed abstractly in the cx23885 module, so the driver can ignore the difference between the CX23885 and CX23888. Signed-off-by: Andy Walls <awalls@radix.net> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
209 lines
5.1 KiB
C
209 lines
5.1 KiB
C
/*
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* Driver for the Conexant CX23885/7/8 PCIe bridge
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*
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* Various common ioctl() support functions
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*
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* Copyright (c) 2009 Andy Walls <awalls@radix.net>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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*
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include "cx23885.h"
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#include <media/v4l2-chip-ident.h>
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int cx23885_g_chip_ident(struct file *file, void *fh,
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struct v4l2_dbg_chip_ident *chip)
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{
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struct cx23885_dev *dev = ((struct cx23885_fh *)fh)->dev;
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int err = 0;
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u8 rev;
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chip->ident = V4L2_IDENT_NONE;
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chip->revision = 0;
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switch (chip->match.type) {
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case V4L2_CHIP_MATCH_HOST:
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switch (chip->match.addr) {
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case 0:
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rev = cx_read(RDR_CFG2) & 0xff;
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switch (dev->pci->device) {
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case 0x8852:
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/* rev 0x04 could be '885 or '888. Pick '888. */
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if (rev == 0x04)
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chip->ident = V4L2_IDENT_CX23888;
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else
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chip->ident = V4L2_IDENT_CX23885;
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break;
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case 0x8880:
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if (rev == 0x0e || rev == 0x0f)
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chip->ident = V4L2_IDENT_CX23887;
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else
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chip->ident = V4L2_IDENT_CX23888;
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break;
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default:
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chip->ident = V4L2_IDENT_UNKNOWN;
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break;
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}
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chip->revision = (dev->pci->device << 16) | (rev << 8) |
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(dev->hwrevision & 0xff);
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break;
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case 1:
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if (dev->v4l_device != NULL) {
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chip->ident = V4L2_IDENT_CX23417;
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chip->revision = 0;
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}
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break;
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case 2:
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/*
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* The integrated IR controller on the CX23888 is
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* host chip 2. It may not be used/initialized or sd_ir
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* may be pointing at the cx25840 subdevice for the
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* IR controller on the CX23885. Thus we find it
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* without using the dev->sd_ir pointer.
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*/
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call_hw(dev, CX23885_HW_888_IR, core, g_chip_ident,
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chip);
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break;
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default:
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err = -EINVAL; /* per V4L2 spec */
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break;
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}
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break;
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case V4L2_CHIP_MATCH_I2C_DRIVER:
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/* If needed, returns V4L2_IDENT_AMBIGUOUS without extra work */
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call_all(dev, core, g_chip_ident, chip);
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break;
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case V4L2_CHIP_MATCH_I2C_ADDR:
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/*
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* We could return V4L2_IDENT_UNKNOWN, but we don't do the work
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* to look if a chip is at the address with no driver. That's a
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* dangerous thing to do with EEPROMs anyway.
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*/
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call_all(dev, core, g_chip_ident, chip);
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break;
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default:
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err = -EINVAL;
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break;
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}
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return err;
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}
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#ifdef CONFIG_VIDEO_ADV_DEBUG
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static int cx23885_g_host_register(struct cx23885_dev *dev,
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struct v4l2_dbg_register *reg)
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{
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if ((reg->reg & 0x3) != 0 || reg->reg >= pci_resource_len(dev->pci, 0))
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return -EINVAL;
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reg->size = 4;
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reg->val = cx_read(reg->reg);
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return 0;
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}
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static int cx23417_g_register(struct cx23885_dev *dev,
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struct v4l2_dbg_register *reg)
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{
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u32 value;
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if (dev->v4l_device == NULL)
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return -EINVAL;
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if ((reg->reg & 0x3) != 0 || reg->reg >= 0x10000)
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return -EINVAL;
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if (mc417_register_read(dev, (u16) reg->reg, &value))
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return -EINVAL; /* V4L2 spec, but -EREMOTEIO really */
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reg->size = 4;
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reg->val = value;
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return 0;
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}
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int cx23885_g_register(struct file *file, void *fh,
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struct v4l2_dbg_register *reg)
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{
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struct cx23885_dev *dev = ((struct cx23885_fh *)fh)->dev;
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if (!capable(CAP_SYS_ADMIN))
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return -EPERM;
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if (reg->match.type == V4L2_CHIP_MATCH_HOST) {
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switch (reg->match.addr) {
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case 0:
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return cx23885_g_host_register(dev, reg);
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case 1:
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return cx23417_g_register(dev, reg);
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default:
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break;
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}
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}
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/* FIXME - any error returns should not be ignored */
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call_all(dev, core, g_register, reg);
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return 0;
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}
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static int cx23885_s_host_register(struct cx23885_dev *dev,
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struct v4l2_dbg_register *reg)
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{
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if ((reg->reg & 0x3) != 0 || reg->reg >= pci_resource_len(dev->pci, 0))
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return -EINVAL;
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reg->size = 4;
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cx_write(reg->reg, reg->val);
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return 0;
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}
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static int cx23417_s_register(struct cx23885_dev *dev,
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struct v4l2_dbg_register *reg)
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{
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if (dev->v4l_device == NULL)
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return -EINVAL;
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if ((reg->reg & 0x3) != 0 || reg->reg >= 0x10000)
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return -EINVAL;
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if (mc417_register_write(dev, (u16) reg->reg, (u32) reg->val))
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return -EINVAL; /* V4L2 spec, but -EREMOTEIO really */
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reg->size = 4;
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return 0;
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}
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int cx23885_s_register(struct file *file, void *fh,
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struct v4l2_dbg_register *reg)
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{
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struct cx23885_dev *dev = ((struct cx23885_fh *)fh)->dev;
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if (!capable(CAP_SYS_ADMIN))
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return -EPERM;
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if (reg->match.type == V4L2_CHIP_MATCH_HOST) {
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switch (reg->match.addr) {
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case 0:
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return cx23885_s_host_register(dev, reg);
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case 1:
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return cx23417_s_register(dev, reg);
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default:
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break;
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}
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}
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/* FIXME - any error returns should not be ignored */
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call_all(dev, core, s_register, reg);
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return 0;
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}
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#endif
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