581 lines
16 KiB
C
581 lines
16 KiB
C
/*
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STB6100 Silicon Tuner
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Copyright (C) Manu Abraham (abraham.manu@gmail.com)
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Copyright (C) ST Microelectronics
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/string.h>
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#include "dvb_frontend.h"
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#include "stb6100.h"
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static unsigned int verbose;
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module_param(verbose, int, 0644);
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/* Max transfer size done by I2C transfer functions */
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#define MAX_XFER_SIZE 64
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#define FE_ERROR 0
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#define FE_NOTICE 1
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#define FE_INFO 2
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#define FE_DEBUG 3
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#define dprintk(x, y, z, format, arg...) do { \
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if (z) { \
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if ((x > FE_ERROR) && (x > y)) \
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printk(KERN_ERR "%s: " format "\n", __func__ , ##arg); \
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else if ((x > FE_NOTICE) && (x > y)) \
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printk(KERN_NOTICE "%s: " format "\n", __func__ , ##arg); \
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else if ((x > FE_INFO) && (x > y)) \
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printk(KERN_INFO "%s: " format "\n", __func__ , ##arg); \
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else if ((x > FE_DEBUG) && (x > y)) \
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printk(KERN_DEBUG "%s: " format "\n", __func__ , ##arg); \
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} else { \
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if (x > y) \
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printk(format, ##arg); \
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} \
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} while (0)
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struct stb6100_lkup {
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u32 val_low;
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u32 val_high;
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u8 reg;
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};
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static int stb6100_release(struct dvb_frontend *fe);
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static const struct stb6100_lkup lkup[] = {
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{ 0, 950000, 0x0a },
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{ 950000, 1000000, 0x0a },
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{ 1000000, 1075000, 0x0c },
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{ 1075000, 1200000, 0x00 },
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{ 1200000, 1300000, 0x01 },
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{ 1300000, 1370000, 0x02 },
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{ 1370000, 1470000, 0x04 },
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{ 1470000, 1530000, 0x05 },
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{ 1530000, 1650000, 0x06 },
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{ 1650000, 1800000, 0x08 },
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{ 1800000, 1950000, 0x0a },
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{ 1950000, 2150000, 0x0c },
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{ 2150000, 9999999, 0x0c },
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{ 0, 0, 0x00 }
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};
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/* Register names for easy debugging. */
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static const char *stb6100_regnames[] = {
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[STB6100_LD] = "LD",
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[STB6100_VCO] = "VCO",
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[STB6100_NI] = "NI",
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[STB6100_NF_LSB] = "NF",
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[STB6100_K] = "K",
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[STB6100_G] = "G",
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[STB6100_F] = "F",
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[STB6100_DLB] = "DLB",
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[STB6100_TEST1] = "TEST1",
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[STB6100_FCCK] = "FCCK",
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[STB6100_LPEN] = "LPEN",
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[STB6100_TEST3] = "TEST3",
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};
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/* Template for normalisation, i.e. setting unused or undocumented
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* bits as required according to the documentation.
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*/
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struct stb6100_regmask {
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u8 mask;
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u8 set;
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};
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static const struct stb6100_regmask stb6100_template[] = {
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[STB6100_LD] = { 0xff, 0x00 },
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[STB6100_VCO] = { 0xff, 0x00 },
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[STB6100_NI] = { 0xff, 0x00 },
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[STB6100_NF_LSB] = { 0xff, 0x00 },
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[STB6100_K] = { 0xc7, 0x38 },
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[STB6100_G] = { 0xef, 0x10 },
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[STB6100_F] = { 0x1f, 0xc0 },
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[STB6100_DLB] = { 0x38, 0xc4 },
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[STB6100_TEST1] = { 0x00, 0x8f },
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[STB6100_FCCK] = { 0x40, 0x0d },
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[STB6100_LPEN] = { 0xf0, 0x0b },
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[STB6100_TEST3] = { 0x00, 0xde },
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};
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/*
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* Currently unused. Some boards might need it in the future
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*/
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static inline void stb6100_normalise_regs(u8 regs[])
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{
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int i;
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for (i = 0; i < STB6100_NUMREGS; i++)
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regs[i] = (regs[i] & stb6100_template[i].mask) | stb6100_template[i].set;
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}
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static int stb6100_read_regs(struct stb6100_state *state, u8 regs[])
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{
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int rc;
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struct i2c_msg msg = {
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.addr = state->config->tuner_address,
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.flags = I2C_M_RD,
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.buf = regs,
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.len = STB6100_NUMREGS
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};
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rc = i2c_transfer(state->i2c, &msg, 1);
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if (unlikely(rc != 1)) {
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dprintk(verbose, FE_ERROR, 1, "Read (0x%x) err, rc=[%d]",
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state->config->tuner_address, rc);
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return -EREMOTEIO;
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}
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if (unlikely(verbose > FE_DEBUG)) {
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int i;
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dprintk(verbose, FE_DEBUG, 1, " Read from 0x%02x", state->config->tuner_address);
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for (i = 0; i < STB6100_NUMREGS; i++)
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dprintk(verbose, FE_DEBUG, 1, " %s: 0x%02x", stb6100_regnames[i], regs[i]);
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}
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return 0;
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}
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static int stb6100_read_reg(struct stb6100_state *state, u8 reg)
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{
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u8 regs[STB6100_NUMREGS];
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struct i2c_msg msg = {
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.addr = state->config->tuner_address + reg,
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.flags = I2C_M_RD,
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.buf = regs,
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.len = 1
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};
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i2c_transfer(state->i2c, &msg, 1);
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if (unlikely(reg >= STB6100_NUMREGS)) {
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dprintk(verbose, FE_ERROR, 1, "Invalid register offset 0x%x", reg);
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return -EINVAL;
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}
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if (unlikely(verbose > FE_DEBUG)) {
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dprintk(verbose, FE_DEBUG, 1, " Read from 0x%02x", state->config->tuner_address);
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dprintk(verbose, FE_DEBUG, 1, " %s: 0x%02x", stb6100_regnames[reg], regs[0]);
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}
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return (unsigned int)regs[0];
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}
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static int stb6100_write_reg_range(struct stb6100_state *state, u8 buf[], int start, int len)
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{
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int rc;
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u8 cmdbuf[MAX_XFER_SIZE];
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struct i2c_msg msg = {
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.addr = state->config->tuner_address,
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.flags = 0,
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.buf = cmdbuf,
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.len = len + 1
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};
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if (1 + len > sizeof(cmdbuf)) {
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printk(KERN_WARNING
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"%s: i2c wr: len=%d is too big!\n",
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KBUILD_MODNAME, len);
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return -EINVAL;
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}
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if (unlikely(start < 1 || start + len > STB6100_NUMREGS)) {
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dprintk(verbose, FE_ERROR, 1, "Invalid register range %d:%d",
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start, len);
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return -EINVAL;
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}
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memcpy(&cmdbuf[1], buf, len);
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cmdbuf[0] = start;
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if (unlikely(verbose > FE_DEBUG)) {
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int i;
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dprintk(verbose, FE_DEBUG, 1, " Write @ 0x%02x: [%d:%d]", state->config->tuner_address, start, len);
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for (i = 0; i < len; i++)
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dprintk(verbose, FE_DEBUG, 1, " %s: 0x%02x", stb6100_regnames[start + i], buf[i]);
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}
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rc = i2c_transfer(state->i2c, &msg, 1);
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if (unlikely(rc != 1)) {
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dprintk(verbose, FE_ERROR, 1, "(0x%x) write err [%d:%d], rc=[%d]",
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(unsigned int)state->config->tuner_address, start, len, rc);
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return -EREMOTEIO;
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}
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return 0;
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}
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static int stb6100_write_reg(struct stb6100_state *state, u8 reg, u8 data)
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{
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u8 tmp = data; /* see gcc.gnu.org/bugzilla/show_bug.cgi?id=81715 */
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if (unlikely(reg >= STB6100_NUMREGS)) {
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dprintk(verbose, FE_ERROR, 1, "Invalid register offset 0x%x", reg);
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return -EREMOTEIO;
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}
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tmp = (tmp & stb6100_template[reg].mask) | stb6100_template[reg].set;
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return stb6100_write_reg_range(state, &tmp, reg, 1);
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}
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static int stb6100_get_status(struct dvb_frontend *fe, u32 *status)
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{
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int rc;
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struct stb6100_state *state = fe->tuner_priv;
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rc = stb6100_read_reg(state, STB6100_LD);
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if (rc < 0) {
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dprintk(verbose, FE_ERROR, 1, "%s failed", __func__);
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return rc;
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}
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return (rc & STB6100_LD_LOCK) ? TUNER_STATUS_LOCKED : 0;
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}
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static int stb6100_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth)
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{
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int rc;
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u8 f;
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u32 bw;
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struct stb6100_state *state = fe->tuner_priv;
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rc = stb6100_read_reg(state, STB6100_F);
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if (rc < 0)
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return rc;
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f = rc & STB6100_F_F;
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bw = (f + 5) * 2000; /* x2 for ZIF */
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*bandwidth = state->bandwidth = bw * 1000;
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dprintk(verbose, FE_DEBUG, 1, "bandwidth = %u Hz", state->bandwidth);
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return 0;
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}
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static int stb6100_set_bandwidth(struct dvb_frontend *fe, u32 bandwidth)
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{
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u32 tmp;
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int rc;
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struct stb6100_state *state = fe->tuner_priv;
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dprintk(verbose, FE_DEBUG, 1, "set bandwidth to %u Hz", bandwidth);
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bandwidth /= 2; /* ZIF */
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if (bandwidth >= 36000000) /* F[4:0] BW/2 max =31+5=36 mhz for F=31 */
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tmp = 31;
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else if (bandwidth <= 5000000) /* bw/2 min = 5Mhz for F=0 */
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tmp = 0;
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else /* if 5 < bw/2 < 36 */
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tmp = (bandwidth + 500000) / 1000000 - 5;
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/* Turn on LPF bandwidth setting clock control,
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* set bandwidth, wait 10ms, turn off.
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*/
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rc = stb6100_write_reg(state, STB6100_FCCK, 0x0d | STB6100_FCCK_FCCK);
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if (rc < 0)
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return rc;
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rc = stb6100_write_reg(state, STB6100_F, 0xc0 | tmp);
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if (rc < 0)
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return rc;
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msleep(5); /* This is dangerous as another (related) thread may start */
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rc = stb6100_write_reg(state, STB6100_FCCK, 0x0d);
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if (rc < 0)
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return rc;
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msleep(10); /* This is dangerous as another (related) thread may start */
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return 0;
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}
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static int stb6100_get_frequency(struct dvb_frontend *fe, u32 *frequency)
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{
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int rc;
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u32 nint, nfrac, fvco;
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int psd2, odiv;
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struct stb6100_state *state = fe->tuner_priv;
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u8 regs[STB6100_NUMREGS];
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rc = stb6100_read_regs(state, regs);
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if (rc < 0)
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return rc;
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odiv = (regs[STB6100_VCO] & STB6100_VCO_ODIV) >> STB6100_VCO_ODIV_SHIFT;
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psd2 = (regs[STB6100_K] & STB6100_K_PSD2) >> STB6100_K_PSD2_SHIFT;
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nint = regs[STB6100_NI];
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nfrac = ((regs[STB6100_K] & STB6100_K_NF_MSB) << 8) | regs[STB6100_NF_LSB];
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fvco = (nfrac * state->reference >> (9 - psd2)) + (nint * state->reference << psd2);
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*frequency = state->frequency = fvco >> (odiv + 1);
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dprintk(verbose, FE_DEBUG, 1,
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"frequency = %u kHz, odiv = %u, psd2 = %u, fxtal = %u kHz, fvco = %u kHz, N(I) = %u, N(F) = %u",
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state->frequency, odiv, psd2, state->reference, fvco, nint, nfrac);
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return 0;
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}
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static int stb6100_set_frequency(struct dvb_frontend *fe, u32 frequency)
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{
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int rc;
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const struct stb6100_lkup *ptr;
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struct stb6100_state *state = fe->tuner_priv;
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struct dtv_frontend_properties *p = &fe->dtv_property_cache;
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u32 srate = 0, fvco, nint, nfrac;
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u8 regs[STB6100_NUMREGS];
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u8 g, psd2, odiv;
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dprintk(verbose, FE_DEBUG, 1, "Version 2010-8-14 13:51");
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if (fe->ops.get_frontend) {
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dprintk(verbose, FE_DEBUG, 1, "Get frontend parameters");
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fe->ops.get_frontend(fe, p);
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}
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srate = p->symbol_rate;
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/* Set up tuner cleanly, LPF calibration on */
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rc = stb6100_write_reg(state, STB6100_FCCK, 0x4d | STB6100_FCCK_FCCK);
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if (rc < 0)
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return rc; /* allow LPF calibration */
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/* PLL Loop disabled, bias on, VCO on, synth on */
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regs[STB6100_LPEN] = 0xeb;
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rc = stb6100_write_reg(state, STB6100_LPEN, regs[STB6100_LPEN]);
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if (rc < 0)
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return rc;
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/* Program the registers with their data values */
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/* VCO divide ratio (LO divide ratio, VCO prescaler enable). */
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if (frequency <= 1075000)
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odiv = 1;
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else
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odiv = 0;
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/* VCO enabled, search clock off as per LL3.7, 3.4.1 */
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regs[STB6100_VCO] = 0xe0 | (odiv << STB6100_VCO_ODIV_SHIFT);
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/* OSM */
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for (ptr = lkup;
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(ptr->val_high != 0) && !CHKRANGE(frequency, ptr->val_low, ptr->val_high);
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ptr++);
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if (ptr->val_high == 0) {
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printk(KERN_ERR "%s: frequency out of range: %u kHz\n", __func__, frequency);
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return -EINVAL;
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}
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regs[STB6100_VCO] = (regs[STB6100_VCO] & ~STB6100_VCO_OSM) | ptr->reg;
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rc = stb6100_write_reg(state, STB6100_VCO, regs[STB6100_VCO]);
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if (rc < 0)
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return rc;
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if ((frequency > 1075000) && (frequency <= 1325000))
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psd2 = 0;
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else
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psd2 = 1;
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/* F(VCO) = F(LO) * (ODIV == 0 ? 2 : 4) */
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fvco = frequency << (1 + odiv);
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/* N(I) = floor(f(VCO) / (f(XTAL) * (PSD2 ? 2 : 1))) */
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nint = fvco / (state->reference << psd2);
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/* N(F) = round(f(VCO) / f(XTAL) * (PSD2 ? 2 : 1) - N(I)) * 2 ^ 9 */
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nfrac = DIV_ROUND_CLOSEST((fvco - (nint * state->reference << psd2))
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<< (9 - psd2), state->reference);
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/* NI */
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regs[STB6100_NI] = nint;
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rc = stb6100_write_reg(state, STB6100_NI, regs[STB6100_NI]);
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if (rc < 0)
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return rc;
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/* NF */
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regs[STB6100_NF_LSB] = nfrac;
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rc = stb6100_write_reg(state, STB6100_NF_LSB, regs[STB6100_NF_LSB]);
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if (rc < 0)
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return rc;
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/* K */
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regs[STB6100_K] = (0x38 & ~STB6100_K_PSD2) | (psd2 << STB6100_K_PSD2_SHIFT);
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regs[STB6100_K] = (regs[STB6100_K] & ~STB6100_K_NF_MSB) | ((nfrac >> 8) & STB6100_K_NF_MSB);
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rc = stb6100_write_reg(state, STB6100_K, regs[STB6100_K]);
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if (rc < 0)
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return rc;
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/* G Baseband gain. */
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if (srate >= 15000000)
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g = 9; /* +4 dB */
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else if (srate >= 5000000)
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g = 11; /* +8 dB */
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else
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g = 14; /* +14 dB */
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regs[STB6100_G] = (0x10 & ~STB6100_G_G) | g;
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regs[STB6100_G] &= ~STB6100_G_GCT; /* mask GCT */
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regs[STB6100_G] |= (1 << 5); /* 2Vp-p Mode */
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rc = stb6100_write_reg(state, STB6100_G, regs[STB6100_G]);
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if (rc < 0)
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return rc;
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/* F we don't write as it is set up in BW set */
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/* DLB set DC servo loop BW to 160Hz (LLA 3.8 / 2.1) */
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regs[STB6100_DLB] = 0xcc;
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rc = stb6100_write_reg(state, STB6100_DLB, regs[STB6100_DLB]);
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if (rc < 0)
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return rc;
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dprintk(verbose, FE_DEBUG, 1,
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"frequency = %u, srate = %u, g = %u, odiv = %u, psd2 = %u, fxtal = %u, osm = %u, fvco = %u, N(I) = %u, N(F) = %u",
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frequency, srate, (unsigned int)g, (unsigned int)odiv,
|
|
(unsigned int)psd2, state->reference,
|
|
ptr->reg, fvco, nint, nfrac);
|
|
|
|
/* Set up the test registers */
|
|
regs[STB6100_TEST1] = 0x8f;
|
|
rc = stb6100_write_reg(state, STB6100_TEST1, regs[STB6100_TEST1]);
|
|
if (rc < 0)
|
|
return rc;
|
|
regs[STB6100_TEST3] = 0xde;
|
|
rc = stb6100_write_reg(state, STB6100_TEST3, regs[STB6100_TEST3]);
|
|
if (rc < 0)
|
|
return rc;
|
|
|
|
/* Bring up tuner according to LLA 3.7 3.4.1, step 2 */
|
|
regs[STB6100_LPEN] = 0xfb; /* PLL Loop enabled, bias on, VCO on, synth on */
|
|
rc = stb6100_write_reg(state, STB6100_LPEN, regs[STB6100_LPEN]);
|
|
if (rc < 0)
|
|
return rc;
|
|
|
|
msleep(2);
|
|
|
|
/* Bring up tuner according to LLA 3.7 3.4.1, step 3 */
|
|
regs[STB6100_VCO] &= ~STB6100_VCO_OCK; /* VCO fast search */
|
|
rc = stb6100_write_reg(state, STB6100_VCO, regs[STB6100_VCO]);
|
|
if (rc < 0)
|
|
return rc;
|
|
|
|
msleep(10); /* This is dangerous as another (related) thread may start */ /* wait for LO to lock */
|
|
|
|
regs[STB6100_VCO] &= ~STB6100_VCO_OSCH; /* vco search disabled */
|
|
regs[STB6100_VCO] |= STB6100_VCO_OCK; /* search clock off */
|
|
rc = stb6100_write_reg(state, STB6100_VCO, regs[STB6100_VCO]);
|
|
if (rc < 0)
|
|
return rc;
|
|
|
|
rc = stb6100_write_reg(state, STB6100_FCCK, 0x0d);
|
|
if (rc < 0)
|
|
return rc; /* Stop LPF calibration */
|
|
|
|
msleep(10); /* This is dangerous as another (related) thread may start */
|
|
/* wait for stabilisation, (should not be necessary) */
|
|
return 0;
|
|
}
|
|
|
|
static int stb6100_sleep(struct dvb_frontend *fe)
|
|
{
|
|
/* TODO: power down */
|
|
return 0;
|
|
}
|
|
|
|
static int stb6100_init(struct dvb_frontend *fe)
|
|
{
|
|
struct stb6100_state *state = fe->tuner_priv;
|
|
int refclk = 27000000; /* Hz */
|
|
|
|
/*
|
|
* iqsense = 1
|
|
* tunerstep = 125000
|
|
*/
|
|
state->bandwidth = 36000000; /* Hz */
|
|
state->reference = refclk / 1000; /* kHz */
|
|
|
|
/* Set default bandwidth. Modified, PN 13-May-10 */
|
|
return 0;
|
|
}
|
|
|
|
static int stb6100_set_params(struct dvb_frontend *fe)
|
|
{
|
|
struct dtv_frontend_properties *c = &fe->dtv_property_cache;
|
|
|
|
if (c->frequency > 0)
|
|
stb6100_set_frequency(fe, c->frequency);
|
|
|
|
if (c->bandwidth_hz > 0)
|
|
stb6100_set_bandwidth(fe, c->bandwidth_hz);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct dvb_tuner_ops stb6100_ops = {
|
|
.info = {
|
|
.name = "STB6100 Silicon Tuner",
|
|
.frequency_min = 950000,
|
|
.frequency_max = 2150000,
|
|
.frequency_step = 0,
|
|
},
|
|
|
|
.init = stb6100_init,
|
|
.sleep = stb6100_sleep,
|
|
.get_status = stb6100_get_status,
|
|
.set_params = stb6100_set_params,
|
|
.get_frequency = stb6100_get_frequency,
|
|
.get_bandwidth = stb6100_get_bandwidth,
|
|
.release = stb6100_release
|
|
};
|
|
|
|
struct dvb_frontend *stb6100_attach(struct dvb_frontend *fe,
|
|
const struct stb6100_config *config,
|
|
struct i2c_adapter *i2c)
|
|
{
|
|
struct stb6100_state *state = NULL;
|
|
|
|
state = kzalloc(sizeof (struct stb6100_state), GFP_KERNEL);
|
|
if (!state)
|
|
return NULL;
|
|
|
|
state->config = config;
|
|
state->i2c = i2c;
|
|
state->frontend = fe;
|
|
state->reference = config->refclock / 1000; /* kHz */
|
|
fe->tuner_priv = state;
|
|
fe->ops.tuner_ops = stb6100_ops;
|
|
|
|
printk("%s: Attaching STB6100 \n", __func__);
|
|
return fe;
|
|
}
|
|
|
|
static int stb6100_release(struct dvb_frontend *fe)
|
|
{
|
|
struct stb6100_state *state = fe->tuner_priv;
|
|
|
|
fe->tuner_priv = NULL;
|
|
kfree(state);
|
|
|
|
return 0;
|
|
}
|
|
|
|
EXPORT_SYMBOL(stb6100_attach);
|
|
MODULE_PARM_DESC(verbose, "Set Verbosity level");
|
|
|
|
MODULE_AUTHOR("Manu Abraham");
|
|
MODULE_DESCRIPTION("STB6100 Silicon tuner");
|
|
MODULE_LICENSE("GPL");
|