tuner-xc2028.c

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/* tuner-xc2028
 *
 * Copyright (c) 2007-2008 Mauro Carvalho Chehab ([e-mail])
 *
 * Copyright (c) 2007 Michel Ludwig ([e-mail])
 *       - frontend interface
 *
 * This code is placed under the terms of the GNU General Public License v2
 */

#include <linux/i2c.h>
#include <asm/div64.h>
#include <linux/firmware.h>
#include <linux/videodev2.h>
#include <linux/delay.h>
#include <media/tuner.h>
#include <linux/mutex.h>
#include "compat.h"
#include <asm/unaligned.h>
#include "tuner-i2c.h"
#include "tuner-xc2028.h"
#include "tuner-xc2028-types.h"

#include <linux/dvb/frontend.h>
#include "dvb_frontend.h"

#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 22)
#define strcasecmp(a, b) strnicmp(a, b, sizeof(a))
#endif

static int debug;
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "enable verbose debug messages");

static char audio_std[8];
module_param_string(audio_std, audio_std, sizeof(audio_std), 0);
MODULE_PARM_DESC(audio_std,
	"Audio standard. XC3028 audio decoder explicitly "
	"needs to know what audio\n"
	"standard is needed for some video standards with audio A2 or NICAM.\n"
	"The valid values are:\n"
	"A2\n"
	"A2/A\n"
	"A2/B\n"
	"NICAM\n"
	"NICAM/A\n"
	"NICAM/B\n");

static char firmware_name[FIRMWARE_NAME_MAX];
module_param_string(firmware_name, firmware_name, sizeof(firmware_name), 0);
MODULE_PARM_DESC(firmware_name, "Firmware file name. Allows overriding the "
				"default firmware name\n");

static LIST_HEAD(hybrid_tuner_instance_list);
static DEFINE_MUTEX(xc2028_list_mutex);

/* struct for storing firmware table */
struct firmware_description {
	unsigned int  type;
	v4l2_std_id   id;
	__u16         int_freq;
	unsigned char *ptr;
	unsigned int  size;
};

struct firmware_properties {
	unsigned int	type;
	v4l2_std_id	id;
	v4l2_std_id	std_req;
	__u16		int_freq;
	unsigned int	scode_table;
	int 		scode_nr;
};

struct xc2028_data {
	struct list_head        hybrid_tuner_instance_list;
	struct tuner_i2c_props  i2c_props;
	__u32			frequency;

	struct firmware_description *firm;
	int			firm_size;
	__u16			firm_version;

	__u16			hwmodel;
	__u16			hwvers;

	struct xc2028_ctrl	ctrl;

	struct firmware_properties cur_fw;

	struct mutex lock;
};

#define i2c_send(priv, buf, size) ({					\
	int _rc;							\
	_rc = tuner_i2c_xfer_send(&priv->i2c_props, buf, size);		\
	if (size != _rc)						\
		tuner_info("i2c output error: rc = %d (should be %d)\n",\
			   _rc, (int)size);				\
	msleep(priv->ctrl.msleep);					\
	_rc;								\
})

#define i2c_rcv(priv, buf, size) ({					\
	int _rc;							\
	_rc = tuner_i2c_xfer_recv(&priv->i2c_props, buf, size);		\
	if (size != _rc)						\
		tuner_err("i2c input error: rc = %d (should be %d)\n",	\
			   _rc, (int)size); 				\
	_rc;								\
})

#define i2c_send_recv(priv, obuf, osize, ibuf, isize) ({		\
	int _rc;							\
	_rc = tuner_i2c_xfer_send_recv(&priv->i2c_props, obuf, osize,	\
				       ibuf, isize);			\
	if (isize != _rc)						\
		tuner_err("i2c input error: rc = %d (should be %d)\n",	\
			   _rc, (int)isize); 				\
	msleep(priv->ctrl.msleep);					\
	_rc;								\
})

#define send_seq(priv, data...)	({					\
	static u8 _val[] = data;					\
	int _rc;							\
	if (sizeof(_val) !=						\
			(_rc = tuner_i2c_xfer_send(&priv->i2c_props,	\
						_val, sizeof(_val)))) {	\
		tuner_err("Error on line %d: %d\n", __LINE__, _rc);	\
	} else 								\
		msleep(priv->ctrl.msleep);				\
	_rc;								\
})

static int xc2028_get_reg(struct xc2028_data *priv, u16 reg, u16 *val)
{
	unsigned char buf[2];
	unsigned char ibuf[2];

	tuner_dbg("%s %04x called\n", __func__, reg);

	buf[0] = reg >> 8;
	buf[1] = (unsigned char) reg;

	if (i2c_send_recv(priv, buf, 2, ibuf, 2) != 2)
		return -EIO;

	*val = (ibuf[1]) | (ibuf[0] << 8);
	return 0;
}

#define dump_firm_type(t) 	dump_firm_type_and_int_freq(t, 0)
static void dump_firm_type_and_int_freq(unsigned int type, u16 int_freq)
{
	 if (type & BASE)
		printk("BASE ");
	 if (type & INIT1)
		printk("INIT1 ");
	 if (type & F8MHZ)
		printk("F8MHZ ");
	 if (type & MTS)
		printk("MTS ");
	 if (type & D2620)
		printk("D2620 ");
	 if (type & D2633)
		printk("D2633 ");
	 if (type & DTV6)
		printk("DTV6 ");
	 if (type & QAM)
		printk("QAM ");
	 if (type & DTV7)
		printk("DTV7 ");
	 if (type & DTV78)
		printk("DTV78 ");
	 if (type & DTV8)
		printk("DTV8 ");
	 if (type & FM)
		printk("FM ");
	 if (type & INPUT1)
		printk("INPUT1 ");
	 if (type & LCD)
		printk("LCD ");
	 if (type & NOGD)
		printk("NOGD ");
	 if (type & MONO)
		printk("MONO ");
	 if (type & ATSC)
		printk("ATSC ");
	 if (type & IF)
		printk("IF ");
	 if (type & LG60)
		printk("LG60 ");
	 if (type & ATI638)
		printk("ATI638 ");
	 if (type & OREN538)
		printk("OREN538 ");
	 if (type & OREN36)
		printk("OREN36 ");
	 if (type & TOYOTA388)
		printk("TOYOTA388 ");
	 if (type & TOYOTA794)
		printk("TOYOTA794 ");
	 if (type & DIBCOM52)
		printk("DIBCOM52 ");
	 if (type & ZARLINK456)
		printk("ZARLINK456 ");
	 if (type & CHINA)
		printk("CHINA ");
	 if (type & F6MHZ)
		printk("F6MHZ ");
	 if (type & INPUT2)
		printk("INPUT2 ");
	 if (type & SCODE)
		printk("SCODE ");
	 if (type & HAS_IF)
		printk("HAS_IF_%d ", int_freq);
}

static  v4l2_std_id parse_audio_std_option(void)
{
	if (strcasecmp(audio_std, "A2") == 0)
		return V4L2_STD_A2;
	if (strcasecmp(audio_std, "A2/A") == 0)
		return V4L2_STD_A2_A;
	if (strcasecmp(audio_std, "A2/B") == 0)
		return V4L2_STD_A2_B;
	if (strcasecmp(audio_std, "NICAM") == 0)
		return V4L2_STD_NICAM;
	if (strcasecmp(audio_std, "NICAM/A") == 0)
		return V4L2_STD_NICAM_A;
	if (strcasecmp(audio_std, "NICAM/B") == 0)
		return V4L2_STD_NICAM_B;

	return 0;
}

static void free_firmware(struct xc2028_data *priv)
{
	int i;
	tuner_dbg("%s called\n", __func__);

	if (!priv->firm)
		return;

	for (i = 0; i < priv->firm_size; i++)
		kfree(priv->firm[i].ptr);

	kfree(priv->firm);

	priv->firm = NULL;
	priv->firm_size = 0;

	memset(&priv->cur_fw, 0, sizeof(priv->cur_fw));
}

static int load_all_firmwares(struct dvb_frontend *fe)
{
	struct xc2028_data    *priv = fe->tuner_priv;
	const struct firmware *fw   = NULL;
	const unsigned char   *p, *endp;
	int                   rc = 0;
	int		      n, n_array;
	char		      name[33];
	char		      *fname;

	tuner_dbg("%s called\n", __func__);

	if (!firmware_name[0])
		fname = priv->ctrl.fname;
	else
		fname = firmware_name;

	tuner_dbg("Reading firmware %s\n", fname);
	rc = request_firmware(&fw, fname, &priv->i2c_props.adap->dev);
	if (rc < 0) {
		if (rc == -ENOENT)
			tuner_err("Error: firmware %s not found.\n",
				   fname);
		else
			tuner_err("Error %d while requesting firmware %s \n",
				   rc, fname);

		return rc;
	}
	p = fw->data;
	endp = p + fw->size;

	if (fw->size < sizeof(name) - 1 + 2 + 2) {
		tuner_err("Error: firmware file %s has invalid size!\n",
			  fname);
		goto corrupt;
	}

	memcpy(name, p, sizeof(name) - 1);
	name[sizeof(name) - 1] = 0;
	p += sizeof(name) - 1;

	priv->firm_version = get_unaligned_le16(p);
	p += 2;

	n_array = get_unaligned_le16(p);
	p += 2;

	tuner_info("Loading %d firmware images from %s, type: %s, ver %d.%d\n",
		   n_array, fname, name,
		   priv->firm_version >> 8, priv->firm_version & 0xff);

	priv->firm = kzalloc(sizeof(*priv->firm) * n_array, GFP_KERNEL);
	if (priv->firm == NULL) {
		tuner_err("Not enough memory to load firmware file.\n");
		rc = -ENOMEM;
		goto err;
	}
	priv->firm_size = n_array;

	n = -1;
	while (p < endp) {
		__u32 type, size;
		v4l2_std_id id;
		__u16 int_freq = 0;

		n++;
		if (n >= n_array) {
			tuner_err("More firmware images in file than "
				  "were expected!\n");
			goto corrupt;
		}

		/* Checks if there's enough bytes to read */
		if (endp - p < sizeof(type) + sizeof(id) + sizeof(size))
			goto header;

		type = get_unaligned_le32(p);
		p += sizeof(type);

		id = get_unaligned_le64(p);
		p += sizeof(id);

		if (type & HAS_IF) {
			int_freq = get_unaligned_le16(p);
			p += sizeof(int_freq);
			if (endp - p < sizeof(size))
				goto header;
		}

		size = get_unaligned_le32(p);
		p += sizeof(size);

		if (!size || size > endp - p) {
			tuner_err("Firmware type ");
			dump_firm_type(type);
			printk("(%x), id %llx is corrupted "
			       "(size=%d, expected %d)\n",
			       type, (unsigned long long)id,
			       (unsigned)(endp - p), size);
			goto corrupt;
		}

		priv->firm[n].ptr = kzalloc(size, GFP_KERNEL);
		if (priv->firm[n].ptr == NULL) {
			tuner_err("Not enough memory to load firmware file.\n");
			rc = -ENOMEM;
			goto err;
		}
		tuner_dbg("Reading firmware type ");
		if (debug) {
			dump_firm_type_and_int_freq(type, int_freq);
			printk("(%x), id %llx, size=%d.\n",
			       type, (unsigned long long)id, size);
		}

		memcpy(priv->firm[n].ptr, p, size);
		priv->firm[n].type = type;
		priv->firm[n].id   = id;
		priv->firm[n].size = size;
		priv->firm[n].int_freq = int_freq;

		p += size;
	}

	if (n + 1 != priv->firm_size) {
		tuner_err("Firmware file is incomplete!\n");
		goto corrupt;
	}

	goto done;

header:
	tuner_err("Firmware header is incomplete!\n");
corrupt:
	rc = -EINVAL;
	tuner_err("Error: firmware file is corrupted!\n");

err:
	tuner_info("Releasing partially loaded firmware file.\n");
	free_firmware(priv);

done:
	release_firmware(fw);
	if (rc == 0)
		tuner_dbg("Firmware files loaded.\n");

	return rc;
}

static int seek_firmware(struct dvb_frontend *fe, unsigned int type,
			 v4l2_std_id *id)
{
	struct xc2028_data *priv = fe->tuner_priv;
	int                 i, best_i = -1, best_nr_matches = 0;
	unsigned int        type_mask = 0;

	tuner_dbg("%s called, want type=", __func__);
	if (debug) {
		dump_firm_type(type);
		printk("(%x), id %016llx.\n", type, (unsigned long long)*id);
	}

	if (!priv->firm) {
		tuner_err("Error! firmware not loaded\n");
		return -EINVAL;
	}

	if (((type & ~SCODE) == 0) && (*id == 0))
		*id = V4L2_STD_PAL;

	if (type & BASE)
		type_mask = BASE_TYPES;
	else if (type & SCODE) {
		type &= SCODE_TYPES;
		type_mask = SCODE_TYPES & ~HAS_IF;
	} else if (type & DTV_TYPES)
		type_mask = DTV_TYPES;
	else if (type & STD_SPECIFIC_TYPES)
		type_mask = STD_SPECIFIC_TYPES;

	type &= type_mask;

	if (!(type & SCODE))
		type_mask = ~0;

	/* Seek for exact match */
	for (i = 0; i < priv->firm_size; i++) {
		if ((type == (priv->firm[i].type & type_mask)) &&
		    (*id == priv->firm[i].id))
			goto found;
	}

	/* Seek for generic video standard match */
	for (i = 0; i < priv->firm_size; i++) {
		v4l2_std_id match_mask;
		int nr_matches;

		if (type != (priv->firm[i].type & type_mask))
			continue;

		match_mask = *id & priv->firm[i].id;
		if (!match_mask)
			continue;

		if ((*id & match_mask) == *id)
			goto found; /* Supports all the requested standards */

		nr_matches = hweight64(match_mask);
		if (nr_matches > best_nr_matches) {
			best_nr_matches = nr_matches;
			best_i = i;
		}
	}

	if (best_nr_matches > 0) {
		tuner_dbg("Selecting best matching firmware (%d bits) for "
			  "type=", best_nr_matches);
		dump_firm_type(type);
		printk("(%x), id %016llx:\n", type, (unsigned long long)*id);
		i = best_i;
		goto found;
	}

	/*FIXME: Would make sense to seek for type "hint" match ? */

	i = -ENOENT;
	goto ret;

found:
	*id = priv->firm[i].id;

ret:
	tuner_dbg("%s firmware for type=", (i < 0) ? "Can't find" : "Found");
	if (debug) {
		dump_firm_type(type);
		printk("(%x), id %016llx.\n", type, (unsigned long long)*id);
	}
	return i;
}

static inline int do_tuner_callback(struct dvb_frontend *fe, int cmd, int arg)
{
	struct xc2028_data *priv = fe->tuner_priv;

	/* analog side (tuner-core) uses i2c_adap->algo_data.
	 * digital side is not guaranteed to have algo_data defined.
	 *
	 * digital side will always have fe->dvb defined.
	 * analog side (tuner-core) doesn't (yet) define fe->dvb.
	 */

	return (!fe->callback) ? -EINVAL :
		fe->callback(((fe->dvb) && (fe->dvb->priv)) ?
				fe->dvb->priv : priv->i2c_props.adap->algo_data,
			     DVB_FRONTEND_COMPONENT_TUNER, cmd, arg);
}

static int load_firmware(struct dvb_frontend *fe, unsigned int type,
			 v4l2_std_id *id)
{
	struct xc2028_data *priv = fe->tuner_priv;
	int                pos, rc;
	unsigned char      *p, *endp, buf[priv->ctrl.max_len];

	tuner_dbg("%s called\n", __func__);

	pos = seek_firmware(fe, type, id);
	if (pos < 0)
		return pos;

	tuner_info("Loading firmware for type=");
	dump_firm_type(priv->firm[pos].type);
	printk("(%x), id %016llx.\n", priv->firm[pos].type,
	       (unsigned long long)*id);

	p = priv->firm[pos].ptr;
	endp = p + priv->firm[pos].size;

	while (p < endp) {
		__u16 size;

		/* Checks if there's enough bytes to read */
		if (p + sizeof(size) > endp) {
			tuner_err("Firmware chunk size is wrong\n");
			return -EINVAL;
		}

		size = le16_to_cpu(*(__u16 *) p);
		p += sizeof(size);

		if (size == 0xffff)
			return 0;

		if (!size) {
			/* Special callback command received */
			rc = do_tuner_callback(fe, XC2028_TUNER_RESET, 0);
			if (rc < 0) {
				tuner_err("Error at RESET code %d\n",
					   (*p) & 0x7f);
				return -EINVAL;
			}
			continue;
		}
		if (size >= 0xff00) {
			switch (size) {
			case 0xff00:
				rc = do_tuner_callback(fe, XC2028_RESET_CLK, 0);
				if (rc < 0) {
					tuner_err("Error at RESET code %d\n",
						  (*p) & 0x7f);
					return -EINVAL;
				}
				break;
			default:
				tuner_info("Invalid RESET code %d\n",
					   size & 0x7f);
				return -EINVAL;

			}
			continue;
		}

		/* Checks for a sleep command */
		if (size & 0x8000) {
			msleep(size & 0x7fff);
			continue;
		}

		if ((size + p > endp)) {
			tuner_err("missing bytes: need %d, have %d\n",
				   size, (int)(endp - p));
			return -EINVAL;
		}

		buf[0] = *p;
		p++;
		size--;

		/* Sends message chunks */
		while (size > 0) {
			int len = (size < priv->ctrl.max_len - 1) ?
				   size : priv->ctrl.max_len - 1;

			memcpy(buf + 1, p, len);

			rc = i2c_send(priv, buf, len + 1);
			if (rc < 0) {
				tuner_err("%d returned from send\n", rc);
				return -EINVAL;
			}

			p += len;
			size -= len;
		}
	}
	return 0;
}

static int load_scode(struct dvb_frontend *fe, unsigned int type,
			 v4l2_std_id *id, __u16 int_freq, int scode)
{
	struct xc2028_data *priv = fe->tuner_priv;
	int                pos, rc;
	unsigned char	   *p;

	tuner_dbg("%s called\n", __func__);

	if (!int_freq) {
		pos = seek_firmware(fe, type, id);
		if (pos < 0)
			return pos;
	} else {
		for (pos = 0; pos < priv->firm_size; pos++) {
			if ((priv->firm[pos].int_freq == int_freq) &&
			    (priv->firm[pos].type & HAS_IF))
				break;
		}
		if (pos == priv->firm_size)
			return -ENOENT;
	}

	p = priv->firm[pos].ptr;

	if (priv->firm[pos].type & HAS_IF) {
		if (priv->firm[pos].size != 12 * 16 || scode >= 16)
			return -EINVAL;
		p += 12 * scode;