[linux-2.6-block.git] / drivers / media / dvb-frontends / s921.c

/*
 *   Sharp VA3A5JZ921 One Seg Broadcast Module driver
 *   This device is labeled as just S. 921 at the top of the frontend can
 *
 *   Copyright (C) 2009-2010 Mauro Carvalho Chehab
 *   Copyright (C) 2009-2010 Douglas Landgraf <dougsland@redhat.com>
 *
 *   Developed for Leadership SBTVD 1seg device sold in Brazil
 *
 *   Frontend module based on cx24123 driver, getting some info from
 *	the old s921 driver.
 *
 *   FIXME: Need to port to DVB v5.2 API
 *
 *   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 version 2.
 *
 *   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.
 */

#include <linux/kernel.h>
#include <asm/div64.h>

#include "dvb_frontend.h"
#include "s921.h"

static int debug = 1;
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "Activates frontend debugging (default:0)");

#define rc(args...)  do {						\
	printk(KERN_ERR  "s921: " args);				\
} while (0)

#define dprintk(args...)						\
	do {								\
		if (debug) {						\
			printk(KERN_DEBUG "s921: %s: ", __func__);	\
			printk(args);					\
		}							\
	} while (0)

struct s921_state {
	struct i2c_adapter *i2c;
	const struct s921_config *config;

	struct dvb_frontend frontend;

	/* The Demod can't easily provide these, we cache them */
	u32 currentfreq;
};

/*
 * Various tuner defaults need to be established for a given frequency kHz.
 * fixme: The bounds on the bands do not match the doc in real life.
 * fixme: Some of them have been moved, other might need adjustment.
 */
static struct s921_bandselect_val {
	u32 freq_low;
	u8  band_reg;
} s921_bandselect[] = {
	{         0, 0x7b },
	{ 485140000, 0x5b },
	{ 515140000, 0x3b },
	{ 545140000, 0x1b },
	{ 599140000, 0xfb },
	{ 623140000, 0xdb },
	{ 659140000, 0xbb },
	{ 713140000, 0x9b },
};

struct regdata {
	u8 reg;
	u8 data;
};

static struct regdata s921_init[] = {
	{ 0x01, 0x80 },		/* Probably, a reset sequence */
	{ 0x01, 0x40 },
	{ 0x01, 0x80 },
	{ 0x01, 0x40 },

	{ 0x02, 0x00 },
	{ 0x03, 0x40 },
	{ 0x04, 0x01 },
	{ 0x05, 0x00 },
	{ 0x06, 0x00 },
	{ 0x07, 0x00 },
	{ 0x08, 0x00 },
	{ 0x09, 0x00 },
	{ 0x0a, 0x00 },
	{ 0x0b, 0x5a },
	{ 0x0c, 0x00 },
	{ 0x0d, 0x00 },
	{ 0x0f, 0x00 },
	{ 0x13, 0x1b },
	{ 0x14, 0x80 },
	{ 0x15, 0x40 },
	{ 0x17, 0x70 },
	{ 0x18, 0x01 },
	{ 0x19, 0x12 },
	{ 0x1a, 0x01 },
	{ 0x1b, 0x12 },
	{ 0x1c, 0xa0 },
	{ 0x1d, 0x00 },
	{ 0x1e, 0x0a },
	{ 0x1f, 0x08 },
	{ 0x20, 0x40 },
	{ 0x21, 0xff },
	{ 0x22, 0x4c },
	{ 0x23, 0x4e },
	{ 0x24, 0x4c },
	{ 0x25, 0x00 },
	{ 0x26, 0x00 },
	{ 0x27, 0xf4 },
	{ 0x28, 0x60 },
	{ 0x29, 0x88 },
	{ 0x2a, 0x40 },
	{ 0x2b, 0x40 },
	{ 0x2c, 0xff },
	{ 0x2d, 0x00 },
	{ 0x2e, 0xff },
	{ 0x2f, 0x00 },
	{ 0x30, 0x20 },
	{ 0x31, 0x06 },
	{ 0x32, 0x0c },
	{ 0x34, 0x0f },
	{ 0x37, 0xfe },
	{ 0x38, 0x00 },
	{ 0x39, 0x63 },
	{ 0x3a, 0x10 },
	{ 0x3b, 0x10 },
	{ 0x47, 0x00 },
	{ 0x49, 0xe5 },
	{ 0x4b, 0x00 },
	{ 0x50, 0xc0 },
	{ 0x52, 0x20 },
	{ 0x54, 0x5a },
	{ 0x55, 0x5b },
	{ 0x56, 0x40 },
	{ 0x57, 0x70 },
	{ 0x5c, 0x50 },
	{ 0x5d, 0x00 },
	{ 0x62, 0x17 },
	{ 0x63, 0x2f },
	{ 0x64, 0x6f },
	{ 0x68, 0x00 },
	{ 0x69, 0x89 },
	{ 0x6a, 0x00 },
	{ 0x6b, 0x00 },
	{ 0x6c, 0x00 },
	{ 0x6d, 0x00 },
	{ 0x6e, 0x00 },
	{ 0x70, 0x10 },
	{ 0x71, 0x00 },
	{ 0x75, 0x00 },
	{ 0x76, 0x30 },
	{ 0x77, 0x01 },
	{ 0xaf, 0x00 },
	{ 0xb0, 0xa0 },
	{ 0xb2, 0x3d },
	{ 0xb3, 0x25 },
	{ 0xb4, 0x8b },
	{ 0xb5, 0x4b },
	{ 0xb6, 0x3f },
	{ 0xb7, 0xff },
	{ 0xb8, 0xff },
	{ 0xb9, 0xfc },
	{ 0xba, 0x00 },
	{ 0xbb, 0x00 },
	{ 0xbc, 0x00 },
	{ 0xd0, 0x30 },
	{ 0xe4, 0x84 },
	{ 0xf0, 0x48 },
	{ 0xf1, 0x19 },
	{ 0xf2, 0x5a },
	{ 0xf3, 0x8e },
	{ 0xf4, 0x2d },
	{ 0xf5, 0x07 },
	{ 0xf6, 0x5a },
	{ 0xf7, 0xba },
	{ 0xf8, 0xd7 },
};

static struct regdata s921_prefreq[] = {
	{ 0x47, 0x60 },
	{ 0x68, 0x00 },
	{ 0x69, 0x89 },
	{ 0xf0, 0x48 },
	{ 0xf1, 0x19 },
};

static struct regdata s921_postfreq[] = {
	{ 0xf5, 0xae },
	{ 0xf6, 0xb7 },
	{ 0xf7, 0xba },
	{ 0xf8, 0xd7 },
	{ 0x68, 0x0a },
	{ 0x69, 0x09 },
};

static int s921_i2c_writereg(struct s921_state *state,
			     u8 i2c_addr, int reg, int data)
{
	u8 buf[] = { reg, data };
	struct i2c_msg msg = {
		.addr = i2c_addr, .flags = 0, .buf = buf, .len = 2
	};
	int rc;

	rc = i2c_transfer(state->i2c, &msg, 1);
	if (rc != 1) {
		printk("%s: writereg rcor(rc == %i, reg == 0x%02x,"
			 " data == 0x%02x)\n", __func__, rc, reg, data);
		return rc;
	}

	return 0;
}

static int s921_i2c_writeregdata(struct s921_state *state, u8 i2c_addr,
				 struct regdata *rd, int size)
{
	int i, rc;

	for (i = 0; i < size; i++) {
		rc = s921_i2c_writereg(state, i2c_addr, rd[i].reg, rd[i].data);
		if (rc < 0)
			return rc;
	}
	return 0;
}

static int s921_i2c_readreg(struct s921_state *state, u8 i2c_addr, u8 reg)
{
	u8 val;
	int rc;
	struct i2c_msg msg[] = {
		{ .addr = i2c_addr, .flags = 0, .buf = &reg, .len = 1 },
		{ .addr = i2c_addr, .flags = I2C_M_RD, .buf = &val, .len = 1 }
	};

	rc = i2c_transfer(state->i2c, msg, 2);

	if (rc != 2) {
		rc("%s: reg=0x%x (rcor=%d)\n", __func__, reg, rc);
		return rc;
	}

	return val;
}

#define s921_readreg(state, reg) \
	s921_i2c_readreg(state, state->config->demod_address, reg)
#define s921_writereg(state, reg, val) \
	s921_i2c_writereg(state, state->config->demod_address, reg, val)
#define s921_writeregdata(state, regdata) \
	s921_i2c_writeregdata(state, state->config->demod_address, \
	regdata, ARRAY_SIZE(regdata))

static int s921_pll_tune(struct dvb_frontend *fe)
{
	struct dtv_frontend_properties *p = &fe->dtv_property_cache;
	struct s921_state *state = fe->demodulator_priv;
	int band, rc, i;
	unsigned long f_offset;
	u8 f_switch;
	u64 offset;

	dprintk("frequency=%i\n", p->frequency);

	for (band = 0; band < ARRAY_SIZE(s921_bandselect); band++)
		if (p->frequency < s921_bandselect[band].freq_low)
			break;
	band--;

	if (band < 0) {
		rc("%s: frequency out of range\n", __func__);
		return -EINVAL;
	}

	f_switch = s921_bandselect[band].band_reg;

	offset = ((u64)p->frequency) * 258;
	do_div(offset, 6000000);
	f_offset = ((unsigned long)offset) + 2321;

	rc = s921_writeregdata(state, s921_prefreq);
	if (rc < 0)
		return rc;

	rc = s921_writereg(state, 0xf2, (f_offset >> 8) & 0xff);
	if (rc < 0)
		return rc;

	rc = s921_writereg(state, 0xf3, f_offset & 0xff);
	if (rc < 0)
		return rc;

	rc = s921_writereg(state, 0xf4, f_switch);
	if (rc < 0)
		return rc;

	rc = s921_writeregdata(state, s921_postfreq);
	if (rc < 0)
		return rc;

	for (i = 0 ; i < 6; i++) {
		rc = s921_readreg(state, 0x80);
		dprintk("status 0x80: %02x\n", rc);
	}
	rc = s921_writereg(state, 0x01, 0x40);
	if (rc < 0)
		return rc;

	rc = s921_readreg(state, 0x01);
	dprintk("status 0x01: %02x\n", rc);

	rc = s921_readreg(state, 0x80);
	dprintk("status 0x80: %02x\n", rc);

	rc = s921_readreg(state, 0x80);
	dprintk("status 0x80: %02x\n", rc);

	rc = s921_readreg(state, 0x32);
	dprintk("status 0x32: %02x\n", rc);

	dprintk("pll tune band=%d, pll=%d\n", f_switch, (int)f_offset);

	return 0;
}

static int s921_initfe(struct dvb_frontend *fe)
{
	struct s921_state *state = fe->demodulator_priv;
	int rc;

	dprintk("\n");

	rc = s921_writeregdata(state, s921_init);
	if (rc < 0)
		return rc;

	return 0;
}

static int s921_read_status(struct dvb_frontend *fe, enum fe_status *status)
{
	struct s921_state *state = fe->demodulator_priv;
	int regstatus, rc;

	*status = 0;

	rc = s921_readreg(state, 0x81);
	if (rc < 0)
		return rc;

	regstatus = rc << 8;

	rc = s921_readreg(state, 0x82);
	if (rc < 0)
		return rc;

	regstatus |= rc;

	dprintk("status = %04x\n", regstatus);

	/* Full Sync - We don't know what each bit means on regs 0x81/0x82 */
	if ((regstatus & 0xff) == 0x40) {
		*status = FE_HAS_SIGNAL  |
			  FE_HAS_CARRIER |
			  FE_HAS_VITERBI |
			  FE_HAS_SYNC    |
			  FE_HAS_LOCK;
	} else if (regstatus & 0x40) {
		/* This is close to Full Sync, but not enough to get useful info */
		*status = FE_HAS_SIGNAL  |
			  FE_HAS_CARRIER |
			  FE_HAS_VITERBI |
			  FE_HAS_SYNC;
	}

	return 0;
}

static int s921_read_signal_strength(struct dvb_frontend *fe, u16 *strength)
{
	enum fe_status	status;
	struct s921_state *state = fe->demodulator_priv;
	int rc;

	/* FIXME: Use the proper register for it... 0x80? */
	rc = s921_read_status(fe, &status);
	if (rc < 0)
		return rc;

	*strength = (status & FE_HAS_LOCK) ? 0xffff : 0;

	dprintk("strength = 0x%04x\n", *strength);

	rc = s921_readreg(state, 0x01);
	dprintk("status 0x01: %02x\n", rc);

	rc = s921_readreg(state, 0x80);
	dprintk("status 0x80: %02x\n", rc);

	rc = s921_readreg(state, 0x32);
	dprintk("status 0x32: %02x\n", rc);

	return 0;
}

static int s921_set_frontend(struct dvb_frontend *fe)
{
	struct dtv_frontend_properties *p = &fe->dtv_property_cache;
	struct s921_state *state = fe->demodulator_priv;
	int rc;

	dprintk("\n");

	/* FIXME: We don't know how to use non-auto mode */

	rc = s921_pll_tune(fe);
	if (rc < 0)
		return rc;

	state->currentfreq = p->frequency;

	return 0;
}

static int s921_get_frontend(struct dvb_frontend *fe,
			     struct dtv_frontend_properties *p)
{
	struct s921_state *state = fe->demodulator_priv;

	/* FIXME: Probably it is possible to get it from regs f1 and f2 */
	p->frequency = state->currentfreq;
	p->delivery_system = SYS_ISDBT;

	return 0;
}

static int s921_tune(struct dvb_frontend *fe,
			bool re_tune,
			unsigned int mode_flags,
			unsigned int *delay,
			enum fe_status *status)
{
	int rc = 0;

	dprintk("\n");

	if (re_tune)
		rc = s921_set_frontend(fe);

	if (!(mode_flags & FE_TUNE_MODE_ONESHOT))
		s921_read_status(fe, status);

	return rc;
}

static int s921_get_algo(struct dvb_frontend *fe)
{
	return DVBFE_ALGO_HW;
}

static void s921_release(struct dvb_frontend *fe)
{
	struct s921_state *state = fe->demodulator_priv;

	dprintk("\n");
	kfree(state);
}

static struct dvb_frontend_ops s921_ops;

struct dvb_frontend *s921_attach(const struct s921_config *config,
				    struct i2c_adapter *i2c)
{
	/* allocate memory for the internal state */
	struct s921_state *state =
		kzalloc(sizeof(struct s921_state), GFP_KERNEL);

	dprintk("\n");
	if (!state) {
		rc("Unable to kzalloc\n");
		return NULL;
	}

	/* setup the state */
	state->config = config;
	state->i2c = i2c;

	/* create dvb_frontend */
	memcpy(&state->frontend.ops, &s921_ops,
		sizeof(struct dvb_frontend_ops));
	state->frontend.demodulator_priv = state;

	return &state->frontend;
}
EXPORT_SYMBOL(s921_attach);

static struct dvb_frontend_ops s921_ops = {
	.delsys = { SYS_ISDBT },
	/* Use dib8000 values per default */
	.info = {
		.name = "Sharp S921",
		.frequency_min = 470000000,
		/*
		 * Max should be 770MHz instead, according with Sharp docs,
		 * but Leadership doc says it works up to 806 MHz. This is
		 * required to get channel 69, used in Brazil
		 */
		.frequency_max = 806000000,
		.frequency_tolerance = 0,
		 .caps = FE_CAN_INVERSION_AUTO |
			 FE_CAN_FEC_1_2  | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
			 FE_CAN_FEC_5_6  | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
			 FE_CAN_QPSK     | FE_CAN_QAM_16 | FE_CAN_QAM_64 |
			 FE_CAN_QAM_AUTO | FE_CAN_TRANSMISSION_MODE_AUTO |
			 FE_CAN_GUARD_INTERVAL_AUTO | FE_CAN_RECOVER |
			 FE_CAN_HIERARCHY_AUTO,
	},

	.release = s921_release,

	.init = s921_initfe,
	.set_frontend = s921_set_frontend,
	.get_frontend = s921_get_frontend,
	.read_status = s921_read_status,
	.read_signal_strength = s921_read_signal_strength,
	.tune = s921_tune,
	.get_frontend_algo = s921_get_algo,
};

MODULE_DESCRIPTION("DVB Frontend module for Sharp S921 hardware");
MODULE_AUTHOR("Mauro Carvalho Chehab");
MODULE_AUTHOR("Douglas Landgraf <dougsland@redhat.com>");
MODULE_LICENSE("GPL");
Commit	Line	Data
3a509bb1 MCC	1	/*
	2	* Sharp VA3A5JZ921 One Seg Broadcast Module driver
	3	* This device is labeled as just S. 921 at the top of the frontend can
	4	*
37e59f87	5	* Copyright (C) 2009-2010 Mauro Carvalho Chehab
3a509bb1 MCC	6	* Copyright (C) 2009-2010 Douglas Landgraf <dougsland@redhat.com>
	7	*
	8	* Developed for Leadership SBTVD 1seg device sold in Brazil
	9	*
	10	* Frontend module based on cx24123 driver, getting some info from
	11	* the old s921 driver.
	12	*
	13	* FIXME: Need to port to DVB v5.2 API
	14	*
	15	* This program is free software; you can redistribute it and/or
	16	* modify it under the terms of the GNU General Public License as
	17	* published by the Free Software Foundation version 2.
	18	*
	19	* This program is distributed in the hope that it will be useful,
	20	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	21	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	22	* General Public License for more details.
	23	*/
	24
	25	#include <linux/kernel.h>
	26	#include <asm/div64.h>
	27
	28	#include "dvb_frontend.h"
	29	#include "s921.h"
	30
	31	static int debug = 1;
	32	module_param(debug, int, 0644);
	33	MODULE_PARM_DESC(debug, "Activates frontend debugging (default:0)");
	34
	35	#define rc(args...) do { \
	36	printk(KERN_ERR "s921: " args); \
	37	} while (0)
	38
	39	#define dprintk(args...) \
	40	do { \
	41	if (debug) { \
	42	printk(KERN_DEBUG "s921: %s: ", __func__); \
	43	printk(args); \
	44	} \
	45	} while (0)
	46
	47	struct s921_state {
	48	struct i2c_adapter *i2c;
	49	const struct s921_config *config;
	50
	51	struct dvb_frontend frontend;
	52
	53	/* The Demod can't easily provide these, we cache them */
	54	u32 currentfreq;
	55	};
	56
	57	/*
	58	* Various tuner defaults need to be established for a given frequency kHz.
	59	* fixme: The bounds on the bands do not match the doc in real life.
	60	* fixme: Some of them have been moved, other might need adjustment.
	61	*/
	62	static struct s921_bandselect_val {
	63	u32 freq_low;
	64	u8 band_reg;
	65	} s921_bandselect[] = {
	66	{ 0, 0x7b },
	67	{ 485140000, 0x5b },
	68	{ 515140000, 0x3b },
	69	{ 545140000, 0x1b },
70	{ 599140000, 0xfb },
71	{ 623140000, 0xdb },
72	{ 659140000, 0xbb },
73	{ 713140000, 0x9b },
74	};
75
76	struct regdata {
77	u8 reg;
78	u8 data;
79	};
80
81	static struct regdata s921_init[] = {
82	{ 0x01, 0x80 }, /* Probably, a reset sequence */
83	{ 0x01, 0x40 },
84	{ 0x01, 0x80 },
85	{ 0x01, 0x40 },
86
87	{ 0x02, 0x00 },
88	{ 0x03, 0x40 },
89	{ 0x04, 0x01 },
90	{ 0x05, 0x00 },
91	{ 0x06, 0x00 },
92	{ 0x07, 0x00 },
93	{ 0x08, 0x00 },
94	{ 0x09, 0x00 },
95	{ 0x0a, 0x00 },
96	{ 0x0b, 0x5a },
97	{ 0x0c, 0x00 },
98	{ 0x0d, 0x00 },
99	{ 0x0f, 0x00 },
100	{ 0x13, 0x1b },
101	{ 0x14, 0x80 },
102	{ 0x15, 0x40 },
103	{ 0x17, 0x70 },
104	{ 0x18, 0x01 },
105	{ 0x19, 0x12 },
106	{ 0x1a, 0x01 },
107	{ 0x1b, 0x12 },
108	{ 0x1c, 0xa0 },
109	{ 0x1d, 0x00 },
110	{ 0x1e, 0x0a },
111	{ 0x1f, 0x08 },
112	{ 0x20, 0x40 },
113	{ 0x21, 0xff },
114	{ 0x22, 0x4c },
115	{ 0x23, 0x4e },
116	{ 0x24, 0x4c },
117	{ 0x25, 0x00 },
118	{ 0x26, 0x00 },
119	{ 0x27, 0xf4 },
120	{ 0x28, 0x60 },
121	{ 0x29, 0x88 },
122	{ 0x2a, 0x40 },
123	{ 0x2b, 0x40 },
124	{ 0x2c, 0xff },
125	{ 0x2d, 0x00 },
126	{ 0x2e, 0xff },
127	{ 0x2f, 0x00 },
128	{ 0x30, 0x20 },
129	{ 0x31, 0x06 },
130	{ 0x32, 0x0c },
131	{ 0x34, 0x0f },
132	{ 0x37, 0xfe },
133	{ 0x38, 0x00 },
134	{ 0x39, 0x63 },
135	{ 0x3a, 0x10 },
136	{ 0x3b, 0x10 },
137	{ 0x47, 0x00 },
138	{ 0x49, 0xe5 },
139	{ 0x4b, 0x00 },
140	{ 0x50, 0xc0 },
141	{ 0x52, 0x20 },
142	{ 0x54, 0x5a },
143	{ 0x55, 0x5b },
144	{ 0x56, 0x40 },
145	{ 0x57, 0x70 },
146	{ 0x5c, 0x50 },
147	{ 0x5d, 0x00 },
148	{ 0x62, 0x17 },
149	{ 0x63, 0x2f },
150	{ 0x64, 0x6f },
151	{ 0x68, 0x00 },
152	{ 0x69, 0x89 },
153	{ 0x6a, 0x00 },
154	{ 0x6b, 0x00 },
155	{ 0x6c, 0x00 },
156	{ 0x6d, 0x00 },
157	{ 0x6e, 0x00 },
158	{ 0x70, 0x10 },
159	{ 0x71, 0x00 },
160	{ 0x75, 0x00 },
161	{ 0x76, 0x30 },
162	{ 0x77, 0x01 },
163	{ 0xaf, 0x00 },
164	{ 0xb0, 0xa0 },
165	{ 0xb2, 0x3d },
166	{ 0xb3, 0x25 },
167	{ 0xb4, 0x8b },
168	{ 0xb5, 0x4b },
169	{ 0xb6, 0x3f },
170	{ 0xb7, 0xff },
171	{ 0xb8, 0xff },
172	{ 0xb9, 0xfc },
173	{ 0xba, 0x00 },
174	{ 0xbb, 0x00 },
175	{ 0xbc, 0x00 },
176	{ 0xd0, 0x30 },
177	{ 0xe4, 0x84 },
178	{ 0xf0, 0x48 },
179	{ 0xf1, 0x19 },
180	{ 0xf2, 0x5a },
181	{ 0xf3, 0x8e },
182	{ 0xf4, 0x2d },
183	{ 0xf5, 0x07 },
184	{ 0xf6, 0x5a },
185	{ 0xf7, 0xba },
186	{ 0xf8, 0xd7 },
187	};
188
189	static struct regdata s921_prefreq[] = {
190	{ 0x47, 0x60 },
191	{ 0x68, 0x00 },
192	{ 0x69, 0x89 },
193	{ 0xf0, 0x48 },
194	{ 0xf1, 0x19 },
195	};
196
197	static struct regdata s921_postfreq[] = {
198	{ 0xf5, 0xae },
199	{ 0xf6, 0xb7 },
200	{ 0xf7, 0xba },
201	{ 0xf8, 0xd7 },
202	{ 0x68, 0x0a },
203	{ 0x69, 0x09 },
204	};
205
206	static int s921_i2c_writereg(struct s921_state *state,
207	u8 i2c_addr, int reg, int data)
208	{
209	u8 buf[] = { reg, data };
210	struct i2c_msg msg = {
211	.addr = i2c_addr, .flags = 0, .buf = buf, .len = 2
212	};
213	int rc;
214
215	rc = i2c_transfer(state->i2c, &msg, 1);
216	if (rc != 1) {
217	printk("%s: writereg rcor(rc == %i, reg == 0x%02x,"
218	" data == 0x%02x)\n", __func__, rc, reg, data);
219	return rc;
220	}
221
222	return 0;
223	}
224
225	static int s921_i2c_writeregdata(struct s921_state *state, u8 i2c_addr,
226	struct regdata *rd, int size)
227	{
228	int i, rc;
229
230	for (i = 0; i < size; i++) {
231	rc = s921_i2c_writereg(state, i2c_addr, rd[i].reg, rd[i].data);
232	if (rc < 0)
233	return rc;
234	}
235	return 0;
236	}
237
238	static int s921_i2c_readreg(struct s921_state *state, u8 i2c_addr, u8 reg)
239	{
240	u8 val;
241	int rc;
242	struct i2c_msg msg[] = {
243	{ .addr = i2c_addr, .flags = 0, .buf = &reg, .len = 1 },
244	{ .addr = i2c_addr, .flags = I2C_M_RD, .buf = &val, .len = 1 }
245	};
246
247	rc = i2c_transfer(state->i2c, msg, 2);
248
249	if (rc != 2) {
250	rc("%s: reg=0x%x (rcor=%d)\n", __func__, reg, rc);
251	return rc;
252	}
253
254	return val;
255	}
256
257	#define s921_readreg(state, reg) \
258	s921_i2c_readreg(state, state->config->demod_address, reg)
259	#define s921_writereg(state, reg, val) \
260	s921_i2c_writereg(state, state->config->demod_address, reg, val)
261	#define s921_writeregdata(state, regdata) \
262	s921_i2c_writeregdata(state, state->config->demod_address, \
263	regdata, ARRAY_SIZE(regdata))
264
16e3d131	265	static int s921_pll_tune(struct dvb_frontend *fe)
3a509bb1	266	{
16e3d131	267	struct dtv_frontend_properties *p = &fe->dtv_property_cache;
3a509bb1 MCC	268	struct s921_state *state = fe->demodulator_priv;
	269	int band, rc, i;
	270	unsigned long f_offset;
	271	u8 f_switch;
	272	u64 offset;
	273
	274	dprintk("frequency=%i\n", p->frequency);
	275
	276	for (band = 0; band < ARRAY_SIZE(s921_bandselect); band++)
	277	if (p->frequency < s921_bandselect[band].freq_low)
	278	break;
	279	band--;
	280
	281	if (band < 0) {
	282	rc("%s: frequency out of range\n", __func__);
	283	return -EINVAL;
	284	}
	285
	286	f_switch = s921_bandselect[band].band_reg;
	287
	288	offset = ((u64)p->frequency) * 258;
	289	do_div(offset, 6000000);
	290	f_offset = ((unsigned long)offset) + 2321;
	291
	292	rc = s921_writeregdata(state, s921_prefreq);
	293	if (rc < 0)
	294	return rc;
	295
	296	rc = s921_writereg(state, 0xf2, (f_offset >> 8) & 0xff);
	297	if (rc < 0)
	298	return rc;
	299
	300	rc = s921_writereg(state, 0xf3, f_offset & 0xff);
	301	if (rc < 0)
	302	return rc;
	303
	304	rc = s921_writereg(state, 0xf4, f_switch);
	305	if (rc < 0)
	306	return rc;
	307
	308	rc = s921_writeregdata(state, s921_postfreq);
	309	if (rc < 0)
	310	return rc;
	311
	312	for (i = 0 ; i < 6; i++) {
	313	rc = s921_readreg(state, 0x80);
	314	dprintk("status 0x80: %02x\n", rc);
	315	}
	316	rc = s921_writereg(state, 0x01, 0x40);
	317	if (rc < 0)
	318	return rc;
	319
	320	rc = s921_readreg(state, 0x01);
	321	dprintk("status 0x01: %02x\n", rc);
	322
	323	rc = s921_readreg(state, 0x80);
	324	dprintk("status 0x80: %02x\n", rc);
	325
	326	rc = s921_readreg(state, 0x80);
	327	dprintk("status 0x80: %02x\n", rc);
	328
	329	rc = s921_readreg(state, 0x32);
	330	dprintk("status 0x32: %02x\n", rc);
	331
332	dprintk("pll tune band=%d, pll=%d\n", f_switch, (int)f_offset);
333
334	return 0;
335	}
336
337	static int s921_initfe(struct dvb_frontend *fe)
338	{
339	struct s921_state *state = fe->demodulator_priv;
340	int rc;
341
342	dprintk("\n");
343
344	rc = s921_writeregdata(state, s921_init);
345	if (rc < 0)
346	return rc;
347
348	return 0;
349	}
350
0df289a2	351	static int s921_read_status(struct dvb_frontend fe, enum fe_status status)
3a509bb1 MCC	352	{
	353	struct s921_state *state = fe->demodulator_priv;
	354	int regstatus, rc;
	355
	356	*status = 0;
	357
	358	rc = s921_readreg(state, 0x81);
	359	if (rc < 0)
	360	return rc;
	361
	362	regstatus = rc << 8;
	363
	364	rc = s921_readreg(state, 0x82);
	365	if (rc < 0)
	366	return rc;
	367
	368	regstatus \|= rc;
	369
	370	dprintk("status = %04x\n", regstatus);
	371
	372	/* Full Sync - We don't know what each bit means on regs 0x81/0x82 */
	373	if ((regstatus & 0xff) == 0x40) {
	374	*status = FE_HAS_SIGNAL \|
	375	FE_HAS_CARRIER \|
	376	FE_HAS_VITERBI \|
	377	FE_HAS_SYNC \|
	378	FE_HAS_LOCK;
	379	} else if (regstatus & 0x40) {
	380	/* This is close to Full Sync, but not enough to get useful info */
	381	*status = FE_HAS_SIGNAL \|
	382	FE_HAS_CARRIER \|
	383	FE_HAS_VITERBI \|
	384	FE_HAS_SYNC;
	385	}
	386
	387	return 0;
	388	}
	389
	390	static int s921_read_signal_strength(struct dvb_frontend fe, u16 strength)
	391	{
0df289a2	392	enum fe_status status;
3a509bb1 MCC	393	struct s921_state *state = fe->demodulator_priv;
	394	int rc;
	395
	396	/* FIXME: Use the proper register for it... 0x80? */
	397	rc = s921_read_status(fe, &status);
	398	if (rc < 0)
	399	return rc;
	400
	401	*strength = (status & FE_HAS_LOCK) ? 0xffff : 0;
	402
	403	dprintk("strength = 0x%04x\n", *strength);
	404
	405	rc = s921_readreg(state, 0x01);
	406	dprintk("status 0x01: %02x\n", rc);
	407
	408	rc = s921_readreg(state, 0x80);
	409	dprintk("status 0x80: %02x\n", rc);
	410
	411	rc = s921_readreg(state, 0x32);
	412	dprintk("status 0x32: %02x\n", rc);
	413
	414	return 0;
	415	}
	416
16e3d131	417	static int s921_set_frontend(struct dvb_frontend *fe)
3a509bb1	418	{
16e3d131	419	struct dtv_frontend_properties *p = &fe->dtv_property_cache;
3a509bb1 MCC	420	struct s921_state *state = fe->demodulator_priv;
	421	int rc;
	422
	423	dprintk("\n");
	424
	425	/* FIXME: We don't know how to use non-auto mode */
	426
16e3d131	427	rc = s921_pll_tune(fe);
3a509bb1 MCC	428	if (rc < 0)
	429	return rc;
	430
	431	state->currentfreq = p->frequency;
	432
	433	return 0;
	434	}
	435
7e3e68bc MCC	436	static int s921_get_frontend(struct dvb_frontend *fe,
7e3e68bc MCC	437	struct dtv_frontend_properties *p)
3a509bb1 MCC	438	{
	439	struct s921_state *state = fe->demodulator_priv;
	440
	441	/* FIXME: Probably it is possible to get it from regs f1 and f2 */
	442	p->frequency = state->currentfreq;
63aad05b	443	p->delivery_system = SYS_ISDBT;
3a509bb1 MCC	444
	445	return 0;
	446	}
	447
	448	static int s921_tune(struct dvb_frontend *fe,
7e072221	449	bool re_tune,
3a509bb1 MCC	450	unsigned int mode_flags,
3a509bb1 MCC	451	unsigned int *delay,
0df289a2	452	enum fe_status *status)
3a509bb1 MCC	453	{
	454	int rc = 0;
	455
	456	dprintk("\n");
	457
7e072221	458	if (re_tune)
16e3d131	459	rc = s921_set_frontend(fe);
3a509bb1 MCC	460
	461	if (!(mode_flags & FE_TUNE_MODE_ONESHOT))
	462	s921_read_status(fe, status);
	463
	464	return rc;
	465	}
	466
	467	static int s921_get_algo(struct dvb_frontend *fe)
	468	{
27460adc	469	return DVBFE_ALGO_HW;
3a509bb1 MCC	470	}
	471
	472	static void s921_release(struct dvb_frontend *fe)
	473	{
	474	struct s921_state *state = fe->demodulator_priv;
	475
	476	dprintk("\n");
	477	kfree(state);
	478	}
	479
	480	static struct dvb_frontend_ops s921_ops;
	481
	482	struct dvb_frontend s921_attach(const struct s921_config config,
	483	struct i2c_adapter *i2c)
	484	{
	485	/* allocate memory for the internal state */
	486	struct s921_state *state =
	487	kzalloc(sizeof(struct s921_state), GFP_KERNEL);
	488
	489	dprintk("\n");
4a0543ee	490	if (!state) {
3a509bb1	491	rc("Unable to kzalloc\n");
4a0543ee	492	return NULL;
3a509bb1 MCC	493	}
	494
	495	/* setup the state */
	496	state->config = config;
	497	state->i2c = i2c;
	498
	499	/* create dvb_frontend */
	500	memcpy(&state->frontend.ops, &s921_ops,
	501	sizeof(struct dvb_frontend_ops));
	502	state->frontend.demodulator_priv = state;
	503
	504	return &state->frontend;
3a509bb1 MCC	505	}
	506	EXPORT_SYMBOL(s921_attach);
	507
	508	static struct dvb_frontend_ops s921_ops = {
16e3d131	509	.delsys = { SYS_ISDBT },
3a509bb1 MCC	510	/* Use dib8000 values per default */
	511	.info = {
	512	.name = "Sharp S921",
3a509bb1 MCC	513	.frequency_min = 470000000,
	514	/*
	515	* Max should be 770MHz instead, according with Sharp docs,
	516	* but Leadership doc says it works up to 806 MHz. This is
	517	* required to get channel 69, used in Brazil
	518	*/
	519	.frequency_max = 806000000,
	520	.frequency_tolerance = 0,
	521	.caps = FE_CAN_INVERSION_AUTO \|
	522	FE_CAN_FEC_1_2 \| FE_CAN_FEC_2_3 \| FE_CAN_FEC_3_4 \|
	523	FE_CAN_FEC_5_6 \| FE_CAN_FEC_7_8 \| FE_CAN_FEC_AUTO \|
	524	FE_CAN_QPSK \| FE_CAN_QAM_16 \| FE_CAN_QAM_64 \|
	525	FE_CAN_QAM_AUTO \| FE_CAN_TRANSMISSION_MODE_AUTO \|
	526	FE_CAN_GUARD_INTERVAL_AUTO \| FE_CAN_RECOVER \|
	527	FE_CAN_HIERARCHY_AUTO,
	528	},
	529
	530	.release = s921_release,
	531
	532	.init = s921_initfe,
16e3d131 MCC	533	.set_frontend = s921_set_frontend,
16e3d131 MCC	534	.get_frontend = s921_get_frontend,
3a509bb1 MCC	535	.read_status = s921_read_status,
	536	.read_signal_strength = s921_read_signal_strength,
	537	.tune = s921_tune,
	538	.get_frontend_algo = s921_get_algo,
	539	};
	540
	541	MODULE_DESCRIPTION("DVB Frontend module for Sharp S921 hardware");
37e59f87	542	MODULE_AUTHOR("Mauro Carvalho Chehab");
3a509bb1 MCC	543	MODULE_AUTHOR("Douglas Landgraf <dougsland@redhat.com>");
3a509bb1 MCC	544	MODULE_LICENSE("GPL");