From 9a0bf528b4d66b605f02634236da085595c22101 Mon Sep 17 00:00:00 2001 From: Mauro Carvalho Chehab Date: Mon, 13 Aug 2012 23:13:41 -0300 Subject: [media] move the dvb/frontends to drivers/media/dvb-frontends Raise the DVB frontends one level up, as the intention is to remove the drivers/media/dvb directory. Signed-off-by: Mauro Carvalho Chehab --- drivers/media/dvb-frontends/zl10039.c | 307 ++++++++++++++++++++++++++++++++++ 1 file changed, 307 insertions(+) create mode 100644 drivers/media/dvb-frontends/zl10039.c (limited to 'drivers/media/dvb-frontends/zl10039.c') diff --git a/drivers/media/dvb-frontends/zl10039.c b/drivers/media/dvb-frontends/zl10039.c new file mode 100644 index 000000000000..eff9c5fde50a --- /dev/null +++ b/drivers/media/dvb-frontends/zl10039.c @@ -0,0 +1,307 @@ +/* + * Driver for Zarlink ZL10039 DVB-S tuner + * + * Copyright 2007 Jan D. Louw + * + * 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 +#include +#include +#include +#include + +#include "dvb_frontend.h" +#include "zl10039.h" + +static int debug; + +#define dprintk(args...) \ + do { \ + if (debug) \ + printk(KERN_DEBUG args); \ + } while (0) + +enum zl10039_model_id { + ID_ZL10039 = 1 +}; + +struct zl10039_state { + struct i2c_adapter *i2c; + u8 i2c_addr; + u8 id; +}; + +enum zl10039_reg_addr { + PLL0 = 0, + PLL1, + PLL2, + PLL3, + RFFE, + BASE0, + BASE1, + BASE2, + LO0, + LO1, + LO2, + LO3, + LO4, + LO5, + LO6, + GENERAL +}; + +static int zl10039_read(const struct zl10039_state *state, + const enum zl10039_reg_addr reg, u8 *buf, + const size_t count) +{ + u8 regbuf[] = { reg }; + struct i2c_msg msg[] = { + {/* Write register address */ + .addr = state->i2c_addr, + .flags = 0, + .buf = regbuf, + .len = 1, + }, {/* Read count bytes */ + .addr = state->i2c_addr, + .flags = I2C_M_RD, + .buf = buf, + .len = count, + }, + }; + + dprintk("%s\n", __func__); + + if (i2c_transfer(state->i2c, msg, 2) != 2) { + dprintk("%s: i2c read error\n", __func__); + return -EREMOTEIO; + } + + return 0; /* Success */ +} + +static int zl10039_write(struct zl10039_state *state, + const enum zl10039_reg_addr reg, const u8 *src, + const size_t count) +{ + u8 buf[count + 1]; + struct i2c_msg msg = { + .addr = state->i2c_addr, + .flags = 0, + .buf = buf, + .len = count + 1, + }; + + dprintk("%s\n", __func__); + /* Write register address and data in one go */ + buf[0] = reg; + memcpy(&buf[1], src, count); + if (i2c_transfer(state->i2c, &msg, 1) != 1) { + dprintk("%s: i2c write error\n", __func__); + return -EREMOTEIO; + } + + return 0; /* Success */ +} + +static inline int zl10039_readreg(struct zl10039_state *state, + const enum zl10039_reg_addr reg, u8 *val) +{ + return zl10039_read(state, reg, val, 1); +} + +static inline int zl10039_writereg(struct zl10039_state *state, + const enum zl10039_reg_addr reg, + const u8 val) +{ + return zl10039_write(state, reg, &val, 1); +} + +static int zl10039_init(struct dvb_frontend *fe) +{ + struct zl10039_state *state = fe->tuner_priv; + int ret; + + dprintk("%s\n", __func__); + if (fe->ops.i2c_gate_ctrl) + fe->ops.i2c_gate_ctrl(fe, 1); + /* Reset logic */ + ret = zl10039_writereg(state, GENERAL, 0x40); + if (ret < 0) { + dprintk("Note: i2c write error normal when resetting the " + "tuner\n"); + } + /* Wake up */ + ret = zl10039_writereg(state, GENERAL, 0x01); + if (ret < 0) { + dprintk("Tuner power up failed\n"); + return ret; + } + if (fe->ops.i2c_gate_ctrl) + fe->ops.i2c_gate_ctrl(fe, 0); + + return 0; +} + +static int zl10039_sleep(struct dvb_frontend *fe) +{ + struct zl10039_state *state = fe->tuner_priv; + int ret; + + dprintk("%s\n", __func__); + if (fe->ops.i2c_gate_ctrl) + fe->ops.i2c_gate_ctrl(fe, 1); + ret = zl10039_writereg(state, GENERAL, 0x80); + if (ret < 0) { + dprintk("Tuner sleep failed\n"); + return ret; + } + if (fe->ops.i2c_gate_ctrl) + fe->ops.i2c_gate_ctrl(fe, 0); + + return 0; +} + +static int zl10039_set_params(struct dvb_frontend *fe) +{ + struct dtv_frontend_properties *c = &fe->dtv_property_cache; + struct zl10039_state *state = fe->tuner_priv; + u8 buf[6]; + u8 bf; + u32 fbw; + u32 div; + int ret; + + dprintk("%s\n", __func__); + dprintk("Set frequency = %d, symbol rate = %d\n", + c->frequency, c->symbol_rate); + + /* Assumed 10.111 MHz crystal oscillator */ + /* Cancelled num/den 80 to prevent overflow */ + div = (c->frequency * 1000) / 126387; + fbw = (c->symbol_rate * 27) / 32000; + /* Cancelled num/den 10 to prevent overflow */ + bf = ((fbw * 5088) / 1011100) - 1; + + /*PLL divider*/ + buf[0] = (div >> 8) & 0x7f; + buf[1] = (div >> 0) & 0xff; + /*Reference divider*/ + /* Select reference ratio of 80 */ + buf[2] = 0x1D; + /*PLL test modes*/ + buf[3] = 0x40; + /*RF Control register*/ + buf[4] = 0x6E; /* Bypass enable */ + /*Baseband filter cutoff */ + buf[5] = bf; + + /* Open i2c gate */ + if (fe->ops.i2c_gate_ctrl) + fe->ops.i2c_gate_ctrl(fe, 1); + /* BR = 10, Enable filter adjustment */ + ret = zl10039_writereg(state, BASE1, 0x0A); + if (ret < 0) + goto error; + /* Write new config values */ + ret = zl10039_write(state, PLL0, buf, sizeof(buf)); + if (ret < 0) + goto error; + /* BR = 10, Disable filter adjustment */ + ret = zl10039_writereg(state, BASE1, 0x6A); + if (ret < 0) + goto error; + + /* Close i2c gate */ + if (fe->ops.i2c_gate_ctrl) + fe->ops.i2c_gate_ctrl(fe, 0); + return 0; +error: + dprintk("Error setting tuner\n"); + return ret; +} + +static int zl10039_release(struct dvb_frontend *fe) +{ + struct zl10039_state *state = fe->tuner_priv; + + dprintk("%s\n", __func__); + kfree(state); + fe->tuner_priv = NULL; + return 0; +} + +static struct dvb_tuner_ops zl10039_ops = { + .release = zl10039_release, + .init = zl10039_init, + .sleep = zl10039_sleep, + .set_params = zl10039_set_params, +}; + +struct dvb_frontend *zl10039_attach(struct dvb_frontend *fe, + u8 i2c_addr, struct i2c_adapter *i2c) +{ + struct zl10039_state *state = NULL; + + dprintk("%s\n", __func__); + state = kmalloc(sizeof(struct zl10039_state), GFP_KERNEL); + if (state == NULL) + goto error; + + state->i2c = i2c; + state->i2c_addr = i2c_addr; + + /* Open i2c gate */ + if (fe->ops.i2c_gate_ctrl) + fe->ops.i2c_gate_ctrl(fe, 1); + /* check if this is a valid tuner */ + if (zl10039_readreg(state, GENERAL, &state->id) < 0) { + /* Close i2c gate */ + if (fe->ops.i2c_gate_ctrl) + fe->ops.i2c_gate_ctrl(fe, 0); + goto error; + } + /* Close i2c gate */ + if (fe->ops.i2c_gate_ctrl) + fe->ops.i2c_gate_ctrl(fe, 0); + + state->id = state->id & 0x0f; + switch (state->id) { + case ID_ZL10039: + strcpy(fe->ops.tuner_ops.info.name, + "Zarlink ZL10039 DVB-S tuner"); + break; + default: + dprintk("Chip ID=%x does not match a known type\n", state->id); + goto error; + } + + memcpy(&fe->ops.tuner_ops, &zl10039_ops, sizeof(struct dvb_tuner_ops)); + fe->tuner_priv = state; + dprintk("Tuner attached @ i2c address 0x%02x\n", i2c_addr); + return fe; +error: + kfree(state); + return NULL; +} +EXPORT_SYMBOL(zl10039_attach); + +module_param(debug, int, 0644); +MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off)."); +MODULE_DESCRIPTION("Zarlink ZL10039 DVB-S tuner driver"); +MODULE_AUTHOR("Jan D. Louw "); +MODULE_LICENSE("GPL"); -- cgit v1.2.1