[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / media / pci / cx23885 / cx23885-ioctl.c

/*
 *  Driver for the Conexant CX23885/7/8 PCIe bridge
 *
 *  Various common ioctl() support functions
 *
 *  Copyright (c) 2009 Andy Walls <awalls@md.metrocast.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 "cx23885-ioctl.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,
				   const struct v4l2_dbg_register *reg)
{
	if ((reg->reg & 0x3) != 0 || reg->reg >= pci_resource_len(dev->pci, 0))
		return -EINVAL;

	cx_write(reg->reg, reg->val);
	return 0;
}

static int cx23417_s_register(struct cx23885_dev *dev,
			      const 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 */
	return 0;
}

int cx23885_s_register(struct file *file, void *fh,
		       const 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
Commit	Line	Data
74618244 AW	1	/*
	2	* Driver for the Conexant CX23885/7/8 PCIe bridge
	3	*
	4	* Various common ioctl() support functions
	5	*
6afdeaf8	6	* Copyright (c) 2009 Andy Walls <awalls@md.metrocast.net>
74618244 AW	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License as published by
	10	* the Free Software Foundation; either version 2 of the License, or
	11	* (at your option) any later version.
	12	*
	13	* This program is distributed in the hope that it will be useful,
	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	*
	17	* GNU General Public License for more details.
	18	*
	19	* You should have received a copy of the GNU General Public License
	20	* along with this program; if not, write to the Free Software
	21	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	22	*/
	23
	24	#include "cx23885.h"
ada73eee MCC	25	#include "cx23885-ioctl.h"
ada73eee MCC	26
74618244 AW	27	#include <media/v4l2-chip-ident.h>
	28
	29	int cx23885_g_chip_ident(struct file file, void fh,
	30	struct v4l2_dbg_chip_ident *chip)
	31	{
	32	struct cx23885_dev dev = ((struct cx23885_fh )fh)->dev;
	33	int err = 0;
	34	u8 rev;
	35
	36	chip->ident = V4L2_IDENT_NONE;
	37	chip->revision = 0;
	38	switch (chip->match.type) {
	39	case V4L2_CHIP_MATCH_HOST:
	40	switch (chip->match.addr) {
	41	case 0:
	42	rev = cx_read(RDR_CFG2) & 0xff;
	43	switch (dev->pci->device) {
	44	case 0x8852:
	45	/* rev 0x04 could be '885 or '888. Pick '888. */
	46	if (rev == 0x04)
	47	chip->ident = V4L2_IDENT_CX23888;
	48	else
	49	chip->ident = V4L2_IDENT_CX23885;
	50	break;
	51	case 0x8880:
	52	if (rev == 0x0e \|\| rev == 0x0f)
	53	chip->ident = V4L2_IDENT_CX23887;
	54	else
	55	chip->ident = V4L2_IDENT_CX23888;
	56	break;
	57	default:
	58	chip->ident = V4L2_IDENT_UNKNOWN;
	59	break;
	60	}
	61	chip->revision = (dev->pci->device << 16) \| (rev << 8) \|
	62	(dev->hwrevision & 0xff);
	63	break;
	64	case 1:
	65	if (dev->v4l_device != NULL) {
	66	chip->ident = V4L2_IDENT_CX23417;
	67	chip->revision = 0;
	68	}
	69	break;
29f8a0a5 AW	70	case 2:
	71	/*
	72	* The integrated IR controller on the CX23888 is
	73	* host chip 2. It may not be used/initialized or sd_ir
	74	* may be pointing at the cx25840 subdevice for the
	75	* IR controller on the CX23885. Thus we find it
	76	* without using the dev->sd_ir pointer.
	77	*/
	78	call_hw(dev, CX23885_HW_888_IR, core, g_chip_ident,
	79	chip);
	80	break;
74618244 AW	81	default:
	82	err = -EINVAL; /* per V4L2 spec */
	83	break;
	84	}
	85	break;
	86	case V4L2_CHIP_MATCH_I2C_DRIVER:
	87	/* If needed, returns V4L2_IDENT_AMBIGUOUS without extra work */
	88	call_all(dev, core, g_chip_ident, chip);
	89	break;
	90	case V4L2_CHIP_MATCH_I2C_ADDR:
	91	/*
	92	* We could return V4L2_IDENT_UNKNOWN, but we don't do the work
	93	* to look if a chip is at the address with no driver. That's a
	94	* dangerous thing to do with EEPROMs anyway.
	95	*/
	96	call_all(dev, core, g_chip_ident, chip);
	97	break;
	98	default:
	99	err = -EINVAL;
	100	break;
	101	}
	102	return err;
	103	}
	104
	105	#ifdef CONFIG_VIDEO_ADV_DEBUG
	106	static int cx23885_g_host_register(struct cx23885_dev *dev,
	107	struct v4l2_dbg_register *reg)
	108	{
	109	if ((reg->reg & 0x3) != 0 \|\| reg->reg >= pci_resource_len(dev->pci, 0))
	110	return -EINVAL;
	111
	112	reg->size = 4;
	113	reg->val = cx_read(reg->reg);
	114	return 0;
	115	}
	116
	117	static int cx23417_g_register(struct cx23885_dev *dev,
	118	struct v4l2_dbg_register *reg)
	119	{
	120	u32 value;
	121
	122	if (dev->v4l_device == NULL)
	123	return -EINVAL;
	124
	125	if ((reg->reg & 0x3) != 0 \|\| reg->reg >= 0x10000)
	126	return -EINVAL;
	127
	128	if (mc417_register_read(dev, (u16) reg->reg, &value))
	129	return -EINVAL; /* V4L2 spec, but -EREMOTEIO really */
	130
	131	reg->size = 4;
	132	reg->val = value;
	133	return 0;
	134	}
	135
	136	int cx23885_g_register(struct file file, void fh,
	137	struct v4l2_dbg_register *reg)
	138	{
	139	struct cx23885_dev dev = ((struct cx23885_fh )fh)->dev;
	140
	141	if (!capable(CAP_SYS_ADMIN))
	142	return -EPERM;
	143
	144	if (reg->match.type == V4L2_CHIP_MATCH_HOST) {
145	switch (reg->match.addr) {
146	case 0:
147	return cx23885_g_host_register(dev, reg);
148	case 1:
149	return cx23417_g_register(dev, reg);
150	default:
151	break;
152	}
153	}
154
155	/* FIXME - any error returns should not be ignored */
156	call_all(dev, core, g_register, reg);
157	return 0;
158	}
159
160	static int cx23885_s_host_register(struct cx23885_dev *dev,
977ba3b1	161	const struct v4l2_dbg_register *reg)
74618244 AW	162	{
	163	if ((reg->reg & 0x3) != 0 \|\| reg->reg >= pci_resource_len(dev->pci, 0))
	164	return -EINVAL;
	165
74618244 AW	166	cx_write(reg->reg, reg->val);
	167	return 0;
	168	}
	169
	170	static int cx23417_s_register(struct cx23885_dev *dev,
977ba3b1	171	const struct v4l2_dbg_register *reg)
74618244 AW	172	{
	173	if (dev->v4l_device == NULL)
	174	return -EINVAL;
	175
	176	if ((reg->reg & 0x3) != 0 \|\| reg->reg >= 0x10000)
	177	return -EINVAL;
	178
	179	if (mc417_register_write(dev, (u16) reg->reg, (u32) reg->val))
	180	return -EINVAL; /* V4L2 spec, but -EREMOTEIO really */
74618244 AW	181	return 0;
	182	}
	183
	184	int cx23885_s_register(struct file file, void fh,
977ba3b1	185	const struct v4l2_dbg_register *reg)
74618244 AW	186	{
	187	struct cx23885_dev dev = ((struct cx23885_fh )fh)->dev;
	188
	189	if (!capable(CAP_SYS_ADMIN))
	190	return -EPERM;
	191
	192	if (reg->match.type == V4L2_CHIP_MATCH_HOST) {
	193	switch (reg->match.addr) {
	194	case 0:
	195	return cx23885_s_host_register(dev, reg);
	196	case 1:
	197	return cx23417_s_register(dev, reg);
	198	default:
	199	break;
	200	}
	201	}
	202
	203	/* FIXME - any error returns should not be ignored */
	204	call_all(dev, core, s_register, reg);
	205	return 0;
	206	}
	207	#endif