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linux/drivers/media/common/tuners/mt2131.c
Tejun Heo 5a0e3ad6af include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files.  percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.

percpu.h -> slab.h dependency is about to be removed.  Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability.  As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.

  http://userweb.kernel.org/~tj/misc/slabh-sweep.py

The script does the followings.

* Scan files for gfp and slab usages and update includes such that
  only the necessary includes are there.  ie. if only gfp is used,
  gfp.h, if slab is used, slab.h.

* When the script inserts a new include, it looks at the include
  blocks and try to put the new include such that its order conforms
  to its surrounding.  It's put in the include block which contains
  core kernel includes, in the same order that the rest are ordered -
  alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
  doesn't seem to be any matching order.

* If the script can't find a place to put a new include (mostly
  because the file doesn't have fitting include block), it prints out
  an error message indicating which .h file needs to be added to the
  file.

The conversion was done in the following steps.

1. The initial automatic conversion of all .c files updated slightly
   over 4000 files, deleting around 700 includes and adding ~480 gfp.h
   and ~3000 slab.h inclusions.  The script emitted errors for ~400
   files.

2. Each error was manually checked.  Some didn't need the inclusion,
   some needed manual addition while adding it to implementation .h or
   embedding .c file was more appropriate for others.  This step added
   inclusions to around 150 files.

3. The script was run again and the output was compared to the edits
   from #2 to make sure no file was left behind.

4. Several build tests were done and a couple of problems were fixed.
   e.g. lib/decompress_*.c used malloc/free() wrappers around slab
   APIs requiring slab.h to be added manually.

5. The script was run on all .h files but without automatically
   editing them as sprinkling gfp.h and slab.h inclusions around .h
   files could easily lead to inclusion dependency hell.  Most gfp.h
   inclusion directives were ignored as stuff from gfp.h was usually
   wildly available and often used in preprocessor macros.  Each
   slab.h inclusion directive was examined and added manually as
   necessary.

6. percpu.h was updated not to include slab.h.

7. Build test were done on the following configurations and failures
   were fixed.  CONFIG_GCOV_KERNEL was turned off for all tests (as my
   distributed build env didn't work with gcov compiles) and a few
   more options had to be turned off depending on archs to make things
   build (like ipr on powerpc/64 which failed due to missing writeq).

   * x86 and x86_64 UP and SMP allmodconfig and a custom test config.
   * powerpc and powerpc64 SMP allmodconfig
   * sparc and sparc64 SMP allmodconfig
   * ia64 SMP allmodconfig
   * s390 SMP allmodconfig
   * alpha SMP allmodconfig
   * um on x86_64 SMP allmodconfig

8. percpu.h modifications were reverted so that it could be applied as
   a separate patch and serve as bisection point.

Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.

Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-30 22:02:32 +09:00

316 lines
8.2 KiB
C
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/*
* Driver for Microtune MT2131 "QAM/8VSB single chip tuner"
*
* Copyright (c) 2006 Steven Toth <stoth@linuxtv.org>
*
* 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/delay.h>
#include <linux/dvb/frontend.h>
#include <linux/i2c.h>
#include <linux/slab.h>
#include "dvb_frontend.h"
#include "mt2131.h"
#include "mt2131_priv.h"
static int debug;
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "Turn on/off debugging (default:off).");
#define dprintk(level,fmt, arg...) if (debug >= level) \
printk(KERN_INFO "%s: " fmt, "mt2131", ## arg)
static u8 mt2131_config1[] = {
0x01,
0x50, 0x00, 0x50, 0x80, 0x00, 0x49, 0xfa, 0x88,
0x08, 0x77, 0x41, 0x04, 0x00, 0x00, 0x00, 0x32,
0x7f, 0xda, 0x4c, 0x00, 0x10, 0xaa, 0x78, 0x80,
0xff, 0x68, 0xa0, 0xff, 0xdd, 0x00, 0x00
};
static u8 mt2131_config2[] = {
0x10,
0x7f, 0xc8, 0x0a, 0x5f, 0x00, 0x04
};
static int mt2131_readreg(struct mt2131_priv *priv, u8 reg, u8 *val)
{
struct i2c_msg msg[2] = {
{ .addr = priv->cfg->i2c_address, .flags = 0,
.buf = &reg, .len = 1 },
{ .addr = priv->cfg->i2c_address, .flags = I2C_M_RD,
.buf = val, .len = 1 },
};
if (i2c_transfer(priv->i2c, msg, 2) != 2) {
printk(KERN_WARNING "mt2131 I2C read failed\n");
return -EREMOTEIO;
}
return 0;
}
static int mt2131_writereg(struct mt2131_priv *priv, u8 reg, u8 val)
{
u8 buf[2] = { reg, val };
struct i2c_msg msg = { .addr = priv->cfg->i2c_address, .flags = 0,
.buf = buf, .len = 2 };
if (i2c_transfer(priv->i2c, &msg, 1) != 1) {
printk(KERN_WARNING "mt2131 I2C write failed\n");
return -EREMOTEIO;
}
return 0;
}
static int mt2131_writeregs(struct mt2131_priv *priv,u8 *buf, u8 len)
{
struct i2c_msg msg = { .addr = priv->cfg->i2c_address,
.flags = 0, .buf = buf, .len = len };
if (i2c_transfer(priv->i2c, &msg, 1) != 1) {
printk(KERN_WARNING "mt2131 I2C write failed (len=%i)\n",
(int)len);
return -EREMOTEIO;
}
return 0;
}
static int mt2131_set_params(struct dvb_frontend *fe,
struct dvb_frontend_parameters *params)
{
struct mt2131_priv *priv;
int ret=0, i;
u32 freq;
u8 if_band_center;
u32 f_lo1, f_lo2;
u32 div1, num1, div2, num2;
u8 b[8];
u8 lockval = 0;
priv = fe->tuner_priv;
if (fe->ops.info.type == FE_OFDM)
priv->bandwidth = params->u.ofdm.bandwidth;
else
priv->bandwidth = 0;
freq = params->frequency / 1000; // Hz -> kHz
dprintk(1, "%s() freq=%d\n", __func__, freq);
f_lo1 = freq + MT2131_IF1 * 1000;
f_lo1 = (f_lo1 / 250) * 250;
f_lo2 = f_lo1 - freq - MT2131_IF2;
priv->frequency = (f_lo1 - f_lo2 - MT2131_IF2) * 1000;
/* Frequency LO1 = 16MHz * (DIV1 + NUM1/8192 ) */
num1 = f_lo1 * 64 / (MT2131_FREF / 128);
div1 = num1 / 8192;
num1 &= 0x1fff;
/* Frequency LO2 = 16MHz * (DIV2 + NUM2/8192 ) */
num2 = f_lo2 * 64 / (MT2131_FREF / 128);
div2 = num2 / 8192;
num2 &= 0x1fff;
if (freq <= 82500) if_band_center = 0x00; else
if (freq <= 137500) if_band_center = 0x01; else
if (freq <= 192500) if_band_center = 0x02; else
if (freq <= 247500) if_band_center = 0x03; else
if (freq <= 302500) if_band_center = 0x04; else
if (freq <= 357500) if_band_center = 0x05; else
if (freq <= 412500) if_band_center = 0x06; else
if (freq <= 467500) if_band_center = 0x07; else
if (freq <= 522500) if_band_center = 0x08; else
if (freq <= 577500) if_band_center = 0x09; else
if (freq <= 632500) if_band_center = 0x0A; else
if (freq <= 687500) if_band_center = 0x0B; else
if (freq <= 742500) if_band_center = 0x0C; else
if (freq <= 797500) if_band_center = 0x0D; else
if (freq <= 852500) if_band_center = 0x0E; else
if (freq <= 907500) if_band_center = 0x0F; else
if (freq <= 962500) if_band_center = 0x10; else
if (freq <= 1017500) if_band_center = 0x11; else
if (freq <= 1072500) if_band_center = 0x12; else if_band_center = 0x13;
b[0] = 1;
b[1] = (num1 >> 5) & 0xFF;
b[2] = (num1 & 0x1F);
b[3] = div1;
b[4] = (num2 >> 5) & 0xFF;
b[5] = num2 & 0x1F;
b[6] = div2;
dprintk(1, "IF1: %dMHz IF2: %dMHz\n", MT2131_IF1, MT2131_IF2);
dprintk(1, "PLL freq=%dkHz band=%d\n", (int)freq, (int)if_band_center);
dprintk(1, "PLL f_lo1=%dkHz f_lo2=%dkHz\n", (int)f_lo1, (int)f_lo2);
dprintk(1, "PLL div1=%d num1=%d div2=%d num2=%d\n",
(int)div1, (int)num1, (int)div2, (int)num2);
dprintk(1, "PLL [1..6]: %2x %2x %2x %2x %2x %2x\n",
(int)b[1], (int)b[2], (int)b[3], (int)b[4], (int)b[5],
(int)b[6]);
ret = mt2131_writeregs(priv,b,7);
if (ret < 0)
return ret;
mt2131_writereg(priv, 0x0b, if_band_center);
/* Wait for lock */
i = 0;
do {
mt2131_readreg(priv, 0x08, &lockval);
if ((lockval & 0x88) == 0x88)
break;
msleep(4);
i++;
} while (i < 10);
return ret;
}
static int mt2131_get_frequency(struct dvb_frontend *fe, u32 *frequency)
{
struct mt2131_priv *priv = fe->tuner_priv;
dprintk(1, "%s()\n", __func__);
*frequency = priv->frequency;
return 0;
}
static int mt2131_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth)
{
struct mt2131_priv *priv = fe->tuner_priv;
dprintk(1, "%s()\n", __func__);
*bandwidth = priv->bandwidth;
return 0;
}
static int mt2131_get_status(struct dvb_frontend *fe, u32 *status)
{
struct mt2131_priv *priv = fe->tuner_priv;
u8 lock_status = 0;
u8 afc_status = 0;
*status = 0;
mt2131_readreg(priv, 0x08, &lock_status);
if ((lock_status & 0x88) == 0x88)
*status = TUNER_STATUS_LOCKED;
mt2131_readreg(priv, 0x09, &afc_status);
dprintk(1, "%s() - LO Status = 0x%x, AFC Status = 0x%x\n",
__func__, lock_status, afc_status);
return 0;
}
static int mt2131_init(struct dvb_frontend *fe)
{
struct mt2131_priv *priv = fe->tuner_priv;
int ret;
dprintk(1, "%s()\n", __func__);
if ((ret = mt2131_writeregs(priv, mt2131_config1,
sizeof(mt2131_config1))) < 0)
return ret;
mt2131_writereg(priv, 0x0b, 0x09);
mt2131_writereg(priv, 0x15, 0x47);
mt2131_writereg(priv, 0x07, 0xf2);
mt2131_writereg(priv, 0x0b, 0x01);
if ((ret = mt2131_writeregs(priv, mt2131_config2,
sizeof(mt2131_config2))) < 0)
return ret;
return ret;
}
static int mt2131_release(struct dvb_frontend *fe)
{
dprintk(1, "%s()\n", __func__);
kfree(fe->tuner_priv);
fe->tuner_priv = NULL;
return 0;
}
static const struct dvb_tuner_ops mt2131_tuner_ops = {
.info = {
.name = "Microtune MT2131",
.frequency_min = 48000000,
.frequency_max = 860000000,
.frequency_step = 50000,
},
.release = mt2131_release,
.init = mt2131_init,
.set_params = mt2131_set_params,
.get_frequency = mt2131_get_frequency,
.get_bandwidth = mt2131_get_bandwidth,
.get_status = mt2131_get_status
};
struct dvb_frontend * mt2131_attach(struct dvb_frontend *fe,
struct i2c_adapter *i2c,
struct mt2131_config *cfg, u16 if1)
{
struct mt2131_priv *priv = NULL;
u8 id = 0;
dprintk(1, "%s()\n", __func__);
priv = kzalloc(sizeof(struct mt2131_priv), GFP_KERNEL);
if (priv == NULL)
return NULL;
priv->cfg = cfg;
priv->bandwidth = 6000000; /* 6MHz */
priv->i2c = i2c;
if (mt2131_readreg(priv, 0, &id) != 0) {
kfree(priv);
return NULL;
}
if ( (id != 0x3E) && (id != 0x3F) ) {
printk(KERN_ERR "MT2131: Device not found at addr 0x%02x\n",
cfg->i2c_address);
kfree(priv);
return NULL;
}
printk(KERN_INFO "MT2131: successfully identified at address 0x%02x\n",
cfg->i2c_address);
memcpy(&fe->ops.tuner_ops, &mt2131_tuner_ops,
sizeof(struct dvb_tuner_ops));
fe->tuner_priv = priv;
return fe;
}
EXPORT_SYMBOL(mt2131_attach);
MODULE_AUTHOR("Steven Toth");
MODULE_DESCRIPTION("Microtune MT2131 silicon tuner driver");
MODULE_LICENSE("GPL");
/*
* Local variables:
* c-basic-offset: 8
*/
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