| /* |
| * Driver for Zarlink ZL10039 DVB-S tuner |
| * |
| * Copyright 2007 Jan D. Louw <jd.louw@mweb.co.za> |
| * |
| * 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 <linux/module.h> |
| #include <linux/init.h> |
| #include <linux/string.h> |
| #include <linux/slab.h> |
| #include <linux/dvb/frontend.h> |
| |
| #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 dvb_frontend_parameters *params) |
| { |
| 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", |
| params->frequency, params->u.qpsk.symbol_rate); |
| |
| /* Assumed 10.111 MHz crystal oscillator */ |
| /* Cancelled num/den 80 to prevent overflow */ |
| div = (params->frequency * 1000) / 126387; |
| fbw = (params->u.qpsk.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 <jd.louw@mweb.co.za>"); |
| MODULE_LICENSE("GPL"); |