linux-sg2042/drivers/media/dvb-frontends/tda8261.c

231 lines
5.9 KiB
C
Raw Normal View History

/*
TDA8261 8PSK/QPSK tuner driver
Copyright (C) Manu Abraham (abraham.manu@gmail.com)
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/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
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>
2010-03-24 16:04:11 +08:00
#include <linux/slab.h>
#include "dvb_frontend.h"
#include "tda8261.h"
struct tda8261_state {
struct dvb_frontend *fe;
struct i2c_adapter *i2c;
const struct tda8261_config *config;
/* state cache */
u32 frequency;
u32 bandwidth;
};
static int tda8261_read(struct tda8261_state *state, u8 *buf)
{
const struct tda8261_config *config = state->config;
int err = 0;
V4L/DVB (13989): [TDA8261] Fix TDA8261 I2C read bug The TDA8261 driver would crash when reading more than a byte as described. ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff [ 8.430350] KNC1-2: MAC addr = 00:09:d6:65:2d:91 [ 8.610008] saa7146 (1) saa7146_i2c_writeout [irq]: timed out waiting for end of xfer [ 8.734457] stb0899_attach: Attaching STB0899 [ 8.768481] tda8261_attach: Attaching TDA8261 8PSK/QPSK tuner [ 8.768485] DVB: registering adapter 2 frontend 0 (STB0899 Multistandard)... Once I launch scan-s2: scan-s2 -vvvv -a 2 -s 1 -l UNIVERSAL /usr/share/dvb/dvb-s/Hotbird-13.0E I see the following via dmesg: [ 435.040017] saa7146 (1) saa7146_i2c_writeout [irq]: timed out waiting for end of xfer [ 435.778648] tda8261_get_bandwidth: Bandwidth=40000000 [ 435.781781] tda8261_get_bandwidth: Bandwidth=40000000 [ 435.783311] tda8261_set_state: Step size=1, Divider=1000, PG=0x793 (1939) [ 435.783512] tda8261_set_state: Waiting to Phase LOCK [ 435.810134] tda8261_get_status: Tuner Phase Locked [ 435.810137] tda8261_set_state: Tuner Phase locked: status=1 [ 435.810139] tda8261_set_frequency: Frequency=1939000 [ 435.810141] tda8261_get_frequency: Frequency=7574 [ 435.830008] tda8261_get_bandwidth: Bandwidth=40000000 [ 436.402814] tda8261_get_bandwidth: Bandwidth=40000000 [ 436.405946] tda8261_get_bandwidth: Bandwidth=40000000 [ 436.407458] general protection fault: 0000 [#1] SMP [ 436.407527] last sysfs file: /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor [ 436.407560] CPU 0 [ 436.407601] Modules linked in: tda8261 stb0899 dvb_pll mt352 lnbp21 budget_av saa7146_vv snd_hda_codec_realtek videodev stv0299 v4l1_compat coretemp snd_hda_intel v4l2_compat_ioctl32 i915 videobuf_dma_sg b2c2_flexcop_pci snd_hda_codec budget_ci videobuf_core b2c2_flexcop ir_common w83627ehf drm snd_hwdep cx24123 budget_core hwmon_vid snd_pcm cx24113 dvb_core iptable_filter snd_timer i2c_algo_bit ip_tables saa7146 s5h1420 snd ttpci_eeprom soundcore intel_agp video serio_raw pcspkr lp snd_page_alloc x_tables output parport pata_it8213 e1000e [ 436.408757] Pid: 1410, comm: kdvb-ad-2-fe-0 Not tainted 2.6.31-14-server #48-Ubuntu C2SBC-Q [ 436.408818] RIP: 0010:[<ffffffffa00241a1>] [<ffffffffa00241a1>] tda8261_set_state+0x51/0x250 [tda8261] [ 436.408903] RSP: 0018:ffff88013649bc70 EFLAGS: 00010283 [ 436.408945] RAX: 00000000000f1748 RBX: ffff880138870680 RCX: 0000000000000018 [ 436.408990] RDX: ffff88013649bcd0 RSI: 0000000000000001 RDI: ffff880135273010 [ 436.409035] RBP: ffff88013649bcc0 R08: 0000000000000001 R09: 0000000000000002 [ 436.409081] R10: ffff88013649bc40 R11: 0000000055555556 R12: 00000000001d9638 [ 436.409126] R13: 38ffffffa0261568 R14: 0000000000000000 R15: ffff880135273010 [ 436.409172] FS: 0000000000000000(0000) GS:ffff880028022000(0000) knlGS:0000000000000000 [ 436.409232] CS: 0010 DS: 0018 ES: 0018 CR0: 000000008005003b [ 436.409274] CR2: 00007fff925e4cd8 CR3: 000000013642a000 CR4: 00000000000406f0 [ 436.409320] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 436.409365] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [ 436.409411] Process kdvb-ad-2-fe-0 (pid: 1410, threadinfo ffff88013649a000, task ffff88013658ad60) [ 436.409473] Stack: [ 436.409508] ffff880136ee2af1 00000000bcd5d166 ffff000200000068 0000000035273000 [ 436.409608] <0> 0000000000000001 ffff880135273000 ffffffffa0265260 00003473bc000000 [ 436.409758] <0> 0000000000000000 ffff88013a4e05e0 ffff88013649bd00 ffffffffa025f133 [ 436.409938] Call Trace: [ 436.409978] [<ffffffffa025f133>] tda8261_set_frequency+0x23/0x70 [budget_av] [ 436.410027] [<ffffffffa026ed09>] ? stb0899_i2c_gate_ctrl+0x49/0xf0 [stb0899] [ 436.410074] [<ffffffffa026e259>] ? stb0899_write_reg+0x19/0x20 [stb0899] [ 436.410121] [<ffffffffa02716e2>] stb0899_dvbs_algo+0x3a2/0x13c8 [stb0899] [ 436.410170] [<ffffffff813cdd0d>] ? i2c_transfer+0xbd/0x100 [ 436.410215] [<ffffffffa026e13c>] ? stb0899_write_regs+0xac/0x1b0 [stb0899] [ 436.410262] [<ffffffffa026f239>] stb0899_search+0x489/0x750 [stb0899] [ 436.410308] [<ffffffff8107d153>] ? down_interruptible+0x33/0x60 [ 436.410360] [<ffffffffa00c34ec>] dvb_frontend_thread+0x57c/0x720 [dvb_core] [ 436.410407] [<ffffffff81078620>] ? autoremove_wake_function+0x0/0x40 [ 436.410457] [<ffffffffa00c2f70>] ? dvb_frontend_thread+0x0/0x720 [dvb_core] [ 436.410504] [<ffffffff81078236>] kthread+0xa6/0xb0 [ 436.410547] [<ffffffff810130aa>] child_rip+0xa/0x20 [ 436.410589] [<ffffffff81078190>] ? kthread+0x0/0xb0 [ 436.410631] [<ffffffff810130a0>] ? child_rip+0x0/0x20 [ 436.410672] Code: 00 03 00 00 4c 8b 6b 10 c7 45 cc 00 00 00 00 0f 84 e8 01 00 00 44 8b 22 41 8d 84 24 10 81 f1 ff 3d 80 4f 12 00 0f 87 af 01 00 00 <41> 8b 75 04 31 d2 48 c7 c7 d8 46 02 a0 89 f0 8b 0c 85 f0 45 02 [ 436.411950] RIP [<ffffffffa00241a1>] tda8261_set_state+0x51/0x250 [tda8261] [ 436.412015] RSP <ffff88013649bc70> [ 436.412064] ---[ end trace c1d7ae4d9e05c51b ]--- Signed-off-by: Arvo Järve <arvo@softshark.ee> Signed-off-by: Manu Abraham <manu@linuxtv.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2010-01-11 04:15:57 +08:00
struct i2c_msg msg = { .addr = config->addr, .flags = I2C_M_RD,.buf = buf, .len = 1 };
if ((err = i2c_transfer(state->i2c, &msg, 1)) != 1)
pr_err("%s: read error, err=%d\n", __func__, err);
return err;
}
static int tda8261_write(struct tda8261_state *state, u8 *buf)
{
const struct tda8261_config *config = state->config;
int err = 0;
struct i2c_msg msg = { .addr = config->addr, .flags = 0, .buf = buf, .len = 4 };
if ((err = i2c_transfer(state->i2c, &msg, 1)) != 1)
pr_err("%s: write error, err=%d\n", __func__, err);
return err;
}
static int tda8261_get_status(struct dvb_frontend *fe, u32 *status)
{
struct tda8261_state *state = fe->tuner_priv;
u8 result = 0;
int err = 0;
*status = 0;
if ((err = tda8261_read(state, &result)) < 0) {
pr_err("%s: I/O Error\n", __func__);
return err;
}
if ((result >> 6) & 0x01) {
pr_debug("%s: Tuner Phase Locked\n", __func__);
*status = 1;
}
return err;
}
static const u32 div_tab[] = { 2000, 1000, 500, 250, 125 }; /* kHz */
static const u8 ref_div[] = { 0x00, 0x01, 0x02, 0x05, 0x07 };
static int tda8261_get_state(struct dvb_frontend *fe,
enum tuner_param param,
struct tuner_state *tstate)
{
struct tda8261_state *state = fe->tuner_priv;
int err = 0;
switch (param) {
case DVBFE_TUNER_FREQUENCY:
tstate->frequency = state->frequency;
break;
case DVBFE_TUNER_BANDWIDTH:
tstate->bandwidth = 40000000; /* FIXME! need to calculate Bandwidth */
break;
default:
pr_err("%s: Unknown parameter (param=%d)\n", __func__, param);
err = -EINVAL;
break;
}
return err;
}
static int tda8261_set_state(struct dvb_frontend *fe,
enum tuner_param param,
struct tuner_state *tstate)
{
struct tda8261_state *state = fe->tuner_priv;
const struct tda8261_config *config = state->config;
u32 frequency, N, status = 0;
u8 buf[4];
int err = 0;
if (param & DVBFE_TUNER_FREQUENCY) {
/**
* N = Max VCO Frequency / Channel Spacing
* Max VCO Frequency = VCO frequency + (channel spacing - 1)
* (to account for half channel spacing on either side)
*/
frequency = tstate->frequency;
if ((frequency < 950000) || (frequency > 2150000)) {
pr_warn("%s: Frequency beyond limits, frequency=%d\n", __func__, frequency);
return -EINVAL;
}
N = (frequency + (div_tab[config->step_size] - 1)) / div_tab[config->step_size];
pr_debug("%s: Step size=%d, Divider=%d, PG=0x%02x (%d)\n",
__func__, config->step_size, div_tab[config->step_size], N, N);
buf[0] = (N >> 8) & 0xff;
buf[1] = N & 0xff;
buf[2] = (0x01 << 7) | ((ref_div[config->step_size] & 0x07) << 1);
if (frequency < 1450000)
buf[3] = 0x00;
else if (frequency < 2000000)
buf[3] = 0x40;
else if (frequency < 2150000)
buf[3] = 0x80;
/* Set params */
if ((err = tda8261_write(state, buf)) < 0) {
pr_err("%s: I/O Error\n", __func__);
return err;
}
/* sleep for some time */
pr_debug("%s: Waiting to Phase LOCK\n", __func__);
msleep(20);
/* check status */
if ((err = tda8261_get_status(fe, &status)) < 0) {
pr_err("%s: I/O Error\n", __func__);
return err;
}
if (status == 1) {
pr_debug("%s: Tuner Phase locked: status=%d\n", __func__, status);
state->frequency = frequency; /* cache successful state */
} else {
pr_debug("%s: No Phase lock: status=%d\n", __func__, status);
}
} else {
pr_err("%s: Unknown parameter (param=%d)\n", __func__, param);
return -EINVAL;
}
return 0;
}
static int tda8261_release(struct dvb_frontend *fe)
{
struct tda8261_state *state = fe->tuner_priv;
fe->tuner_priv = NULL;
kfree(state);
return 0;
}
static struct dvb_tuner_ops tda8261_ops = {
.info = {
.name = "TDA8261",
// .tuner_name = NULL,
.frequency_min = 950000,
.frequency_max = 2150000,
.frequency_step = 0
},
.set_state = tda8261_set_state,
.get_state = tda8261_get_state,
.get_status = tda8261_get_status,
.release = tda8261_release
};
struct dvb_frontend *tda8261_attach(struct dvb_frontend *fe,
const struct tda8261_config *config,
struct i2c_adapter *i2c)
{
struct tda8261_state *state = NULL;
if ((state = kzalloc(sizeof (struct tda8261_state), GFP_KERNEL)) == NULL)
goto exit;
state->config = config;
state->i2c = i2c;
state->fe = fe;
fe->tuner_priv = state;
fe->ops.tuner_ops = tda8261_ops;
fe->ops.tuner_ops.info.frequency_step = div_tab[config->step_size];
// fe->ops.tuner_ops.tuner_name = &config->buf;
// printk("%s: Attaching %s TDA8261 8PSK/QPSK tuner\n",
// __func__, fe->ops.tuner_ops.tuner_name);
pr_info("%s: Attaching TDA8261 8PSK/QPSK tuner\n", __func__);
return fe;
exit:
kfree(state);
return NULL;
}
EXPORT_SYMBOL(tda8261_attach);
MODULE_AUTHOR("Manu Abraham");
MODULE_DESCRIPTION("TDA8261 8PSK/QPSK Tuner");
MODULE_LICENSE("GPL");