DiBcom: protect the I2C bufer access
commit 79fcce3230b140f7675f8529ee53fe2f9644f902 upstream.
This patch protects the I2C buffer access in order to manage concurrent
access. This protection is done using mutex.
Furthermore, for the dib9000, if a pid filtering command is
received during the tuning, this pid filtering command is delayed to
avoid any concurrent access issue.
Cc: Mauro Carvalho Chehab <mchehab@redhat.com>
Cc: Florian Mickler <florian@mickler.org>
Signed-off-by: Olivier Grenie <olivier.grenie@dibcom.fr>
Signed-off-by: Patrick Boettcher <Patrick.Boettcher@dibcom.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/media/dvb/frontends/dib0070.c b/drivers/media/dvb/frontends/dib0070.c
index 1d47d4d..dc1cb17 100644
--- a/drivers/media/dvb/frontends/dib0070.c
+++ b/drivers/media/dvb/frontends/dib0070.c
@@ -27,6 +27,7 @@
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/i2c.h>
+#include <linux/mutex.h>
#include "dvb_frontend.h"
@@ -78,10 +79,18 @@
struct i2c_msg msg[2];
u8 i2c_write_buffer[3];
u8 i2c_read_buffer[2];
+ struct mutex i2c_buffer_lock;
};
-static uint16_t dib0070_read_reg(struct dib0070_state *state, u8 reg)
+static u16 dib0070_read_reg(struct dib0070_state *state, u8 reg)
{
+ u16 ret;
+
+ if (mutex_lock_interruptible(&state->i2c_buffer_lock) < 0) {
+ dprintk("could not acquire lock");
+ return 0;
+ }
+
state->i2c_write_buffer[0] = reg;
memset(state->msg, 0, 2 * sizeof(struct i2c_msg));
@@ -96,13 +105,23 @@
if (i2c_transfer(state->i2c, state->msg, 2) != 2) {
printk(KERN_WARNING "DiB0070 I2C read failed\n");
- return 0;
- }
- return (state->i2c_read_buffer[0] << 8) | state->i2c_read_buffer[1];
+ ret = 0;
+ } else
+ ret = (state->i2c_read_buffer[0] << 8)
+ | state->i2c_read_buffer[1];
+
+ mutex_unlock(&state->i2c_buffer_lock);
+ return ret;
}
static int dib0070_write_reg(struct dib0070_state *state, u8 reg, u16 val)
{
+ int ret;
+
+ if (mutex_lock_interruptible(&state->i2c_buffer_lock) < 0) {
+ dprintk("could not acquire lock");
+ return -EINVAL;
+ }
state->i2c_write_buffer[0] = reg;
state->i2c_write_buffer[1] = val >> 8;
state->i2c_write_buffer[2] = val & 0xff;
@@ -115,9 +134,12 @@
if (i2c_transfer(state->i2c, state->msg, 1) != 1) {
printk(KERN_WARNING "DiB0070 I2C write failed\n");
- return -EREMOTEIO;
- }
- return 0;
+ ret = -EREMOTEIO;
+ } else
+ ret = 0;
+
+ mutex_unlock(&state->i2c_buffer_lock);
+ return ret;
}
#define HARD_RESET(state) do { \
@@ -734,6 +756,7 @@
state->cfg = cfg;
state->i2c = i2c;
state->fe = fe;
+ mutex_init(&state->i2c_buffer_lock);
fe->tuner_priv = state;
if (dib0070_reset(fe) != 0)
diff --git a/drivers/media/dvb/frontends/dib0090.c b/drivers/media/dvb/frontends/dib0090.c
index c9c935a..b174d1c 100644
--- a/drivers/media/dvb/frontends/dib0090.c
+++ b/drivers/media/dvb/frontends/dib0090.c
@@ -27,6 +27,7 @@
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/i2c.h>
+#include <linux/mutex.h>
#include "dvb_frontend.h"
@@ -196,6 +197,7 @@
struct i2c_msg msg[2];
u8 i2c_write_buffer[3];
u8 i2c_read_buffer[2];
+ struct mutex i2c_buffer_lock;
};
struct dib0090_fw_state {
@@ -208,10 +210,18 @@
struct i2c_msg msg;
u8 i2c_write_buffer[2];
u8 i2c_read_buffer[2];
+ struct mutex i2c_buffer_lock;
};
static u16 dib0090_read_reg(struct dib0090_state *state, u8 reg)
{
+ u16 ret;
+
+ if (mutex_lock_interruptible(&state->i2c_buffer_lock) < 0) {
+ dprintk("could not acquire lock");
+ return 0;
+ }
+
state->i2c_write_buffer[0] = reg;
memset(state->msg, 0, 2 * sizeof(struct i2c_msg));
@@ -226,14 +236,24 @@
if (i2c_transfer(state->i2c, state->msg, 2) != 2) {
printk(KERN_WARNING "DiB0090 I2C read failed\n");
- return 0;
- }
+ ret = 0;
+ } else
+ ret = (state->i2c_read_buffer[0] << 8)
+ | state->i2c_read_buffer[1];
- return (state->i2c_read_buffer[0] << 8) | state->i2c_read_buffer[1];
+ mutex_unlock(&state->i2c_buffer_lock);
+ return ret;
}
static int dib0090_write_reg(struct dib0090_state *state, u32 reg, u16 val)
{
+ int ret;
+
+ if (mutex_lock_interruptible(&state->i2c_buffer_lock) < 0) {
+ dprintk("could not acquire lock");
+ return -EINVAL;
+ }
+
state->i2c_write_buffer[0] = reg & 0xff;
state->i2c_write_buffer[1] = val >> 8;
state->i2c_write_buffer[2] = val & 0xff;
@@ -246,13 +266,23 @@
if (i2c_transfer(state->i2c, state->msg, 1) != 1) {
printk(KERN_WARNING "DiB0090 I2C write failed\n");
- return -EREMOTEIO;
- }
- return 0;
+ ret = -EREMOTEIO;
+ } else
+ ret = 0;
+
+ mutex_unlock(&state->i2c_buffer_lock);
+ return ret;
}
static u16 dib0090_fw_read_reg(struct dib0090_fw_state *state, u8 reg)
{
+ u16 ret;
+
+ if (mutex_lock_interruptible(&state->i2c_buffer_lock) < 0) {
+ dprintk("could not acquire lock");
+ return 0;
+ }
+
state->i2c_write_buffer[0] = reg;
memset(&state->msg, 0, sizeof(struct i2c_msg));
@@ -262,13 +292,24 @@
state->msg.len = 2;
if (i2c_transfer(state->i2c, &state->msg, 1) != 1) {
printk(KERN_WARNING "DiB0090 I2C read failed\n");
- return 0;
- }
- return (state->i2c_read_buffer[0] << 8) | state->i2c_read_buffer[1];
+ ret = 0;
+ } else
+ ret = (state->i2c_read_buffer[0] << 8)
+ | state->i2c_read_buffer[1];
+
+ mutex_unlock(&state->i2c_buffer_lock);
+ return ret;
}
static int dib0090_fw_write_reg(struct dib0090_fw_state *state, u8 reg, u16 val)
{
+ int ret;
+
+ if (mutex_lock_interruptible(&state->i2c_buffer_lock) < 0) {
+ dprintk("could not acquire lock");
+ return -EINVAL;
+ }
+
state->i2c_write_buffer[0] = val >> 8;
state->i2c_write_buffer[1] = val & 0xff;
@@ -279,9 +320,12 @@
state->msg.len = 2;
if (i2c_transfer(state->i2c, &state->msg, 1) != 1) {
printk(KERN_WARNING "DiB0090 I2C write failed\n");
- return -EREMOTEIO;
- }
- return 0;
+ ret = -EREMOTEIO;
+ } else
+ ret = 0;
+
+ mutex_unlock(&state->i2c_buffer_lock);
+ return ret;
}
#define HARD_RESET(state) do { if (cfg->reset) { if (cfg->sleep) cfg->sleep(fe, 0); msleep(10); cfg->reset(fe, 1); msleep(10); cfg->reset(fe, 0); msleep(10); } } while (0)
@@ -2440,6 +2484,7 @@
st->config = config;
st->i2c = i2c;
st->fe = fe;
+ mutex_init(&st->i2c_buffer_lock);
fe->tuner_priv = st;
if (config->wbd == NULL)
@@ -2471,6 +2516,7 @@
st->config = config;
st->i2c = i2c;
st->fe = fe;
+ mutex_init(&st->i2c_buffer_lock);
fe->tuner_priv = st;
if (dib0090_fw_reset_digital(fe, st->config) != 0)
diff --git a/drivers/media/dvb/frontends/dib7000m.c b/drivers/media/dvb/frontends/dib7000m.c
index 79cb1c2..dbb76d7 100644
--- a/drivers/media/dvb/frontends/dib7000m.c
+++ b/drivers/media/dvb/frontends/dib7000m.c
@@ -11,6 +11,7 @@
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/i2c.h>
+#include <linux/mutex.h>
#include "dvb_frontend.h"
@@ -55,6 +56,7 @@
struct i2c_msg msg[2];
u8 i2c_write_buffer[4];
u8 i2c_read_buffer[2];
+ struct mutex i2c_buffer_lock;
};
enum dib7000m_power_mode {
@@ -69,6 +71,13 @@
static u16 dib7000m_read_word(struct dib7000m_state *state, u16 reg)
{
+ u16 ret;
+
+ if (mutex_lock_interruptible(&state->i2c_buffer_lock) < 0) {
+ dprintk("could not acquire lock");
+ return 0;
+ }
+
state->i2c_write_buffer[0] = (reg >> 8) | 0x80;
state->i2c_write_buffer[1] = reg & 0xff;
@@ -85,11 +94,21 @@
if (i2c_transfer(state->i2c_adap, state->msg, 2) != 2)
dprintk("i2c read error on %d",reg);
- return (state->i2c_read_buffer[0] << 8) | state->i2c_read_buffer[1];
+ ret = (state->i2c_read_buffer[0] << 8) | state->i2c_read_buffer[1];
+ mutex_unlock(&state->i2c_buffer_lock);
+
+ return ret;
}
static int dib7000m_write_word(struct dib7000m_state *state, u16 reg, u16 val)
{
+ int ret;
+
+ if (mutex_lock_interruptible(&state->i2c_buffer_lock) < 0) {
+ dprintk("could not acquire lock");
+ return -EINVAL;
+ }
+
state->i2c_write_buffer[0] = (reg >> 8) & 0xff;
state->i2c_write_buffer[1] = reg & 0xff;
state->i2c_write_buffer[2] = (val >> 8) & 0xff;
@@ -101,7 +120,10 @@
state->msg[0].buf = state->i2c_write_buffer;
state->msg[0].len = 4;
- return i2c_transfer(state->i2c_adap, state->msg, 1) != 1 ? -EREMOTEIO : 0;
+ ret = (i2c_transfer(state->i2c_adap, state->msg, 1) != 1 ?
+ -EREMOTEIO : 0);
+ mutex_unlock(&state->i2c_buffer_lock);
+ return ret;
}
static void dib7000m_write_tab(struct dib7000m_state *state, u16 *buf)
{
@@ -1385,6 +1407,7 @@
demod = &st->demod;
demod->demodulator_priv = st;
memcpy(&st->demod.ops, &dib7000m_ops, sizeof(struct dvb_frontend_ops));
+ mutex_init(&st->i2c_buffer_lock);
st->timf_default = cfg->bw->timf;
diff --git a/drivers/media/dvb/frontends/dib7000p.c b/drivers/media/dvb/frontends/dib7000p.c
index 0c9f40c..292bc19 100644
--- a/drivers/media/dvb/frontends/dib7000p.c
+++ b/drivers/media/dvb/frontends/dib7000p.c
@@ -10,6 +10,7 @@
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/i2c.h>
+#include <linux/mutex.h>
#include "dvb_math.h"
#include "dvb_frontend.h"
@@ -68,6 +69,7 @@
struct i2c_msg msg[2];
u8 i2c_write_buffer[4];
u8 i2c_read_buffer[2];
+ struct mutex i2c_buffer_lock;
};
enum dib7000p_power_mode {
@@ -81,6 +83,13 @@
static u16 dib7000p_read_word(struct dib7000p_state *state, u16 reg)
{
+ u16 ret;
+
+ if (mutex_lock_interruptible(&state->i2c_buffer_lock) < 0) {
+ dprintk("could not acquire lock");
+ return 0;
+ }
+
state->i2c_write_buffer[0] = reg >> 8;
state->i2c_write_buffer[1] = reg & 0xff;
@@ -97,11 +106,20 @@
if (i2c_transfer(state->i2c_adap, state->msg, 2) != 2)
dprintk("i2c read error on %d", reg);
- return (state->i2c_read_buffer[0] << 8) | state->i2c_read_buffer[1];
+ ret = (state->i2c_read_buffer[0] << 8) | state->i2c_read_buffer[1];
+ mutex_unlock(&state->i2c_buffer_lock);
+ return ret;
}
static int dib7000p_write_word(struct dib7000p_state *state, u16 reg, u16 val)
{
+ int ret;
+
+ if (mutex_lock_interruptible(&state->i2c_buffer_lock) < 0) {
+ dprintk("could not acquire lock");
+ return -EINVAL;
+ }
+
state->i2c_write_buffer[0] = (reg >> 8) & 0xff;
state->i2c_write_buffer[1] = reg & 0xff;
state->i2c_write_buffer[2] = (val >> 8) & 0xff;
@@ -113,7 +131,10 @@
state->msg[0].buf = state->i2c_write_buffer;
state->msg[0].len = 4;
- return i2c_transfer(state->i2c_adap, state->msg, 1) != 1 ? -EREMOTEIO : 0;
+ ret = (i2c_transfer(state->i2c_adap, state->msg, 1) != 1 ?
+ -EREMOTEIO : 0);
+ mutex_unlock(&state->i2c_buffer_lock);
+ return ret;
}
static void dib7000p_write_tab(struct dib7000p_state *state, u16 * buf)
@@ -1646,6 +1667,7 @@
return -ENOMEM;
dpst->i2c_adap = i2c;
+ mutex_init(&dpst->i2c_buffer_lock);
for (k = no_of_demods - 1; k >= 0; k--) {
dpst->cfg = cfg[k];
@@ -2324,6 +2346,7 @@
demod = &st->demod;
demod->demodulator_priv = st;
memcpy(&st->demod.ops, &dib7000p_ops, sizeof(struct dvb_frontend_ops));
+ mutex_init(&st->i2c_buffer_lock);
dib7000p_write_word(st, 1287, 0x0003); /* sram lead in, rdy */
@@ -2333,8 +2356,9 @@
st->version = dib7000p_read_word(st, 897);
/* FIXME: make sure the dev.parent field is initialized, or else
- request_firmware() will hit an OOPS (this should be moved somewhere
- more common) */
+ request_firmware() will hit an OOPS (this should be moved somewhere
+ more common) */
+ st->i2c_master.gated_tuner_i2c_adap.dev.parent = i2c_adap->dev.parent;
dibx000_init_i2c_master(&st->i2c_master, DIB7000P, st->i2c_adap, st->i2c_addr);
diff --git a/drivers/media/dvb/frontends/dib8000.c b/drivers/media/dvb/frontends/dib8000.c
index 7d2ea11..fe284d5 100644
--- a/drivers/media/dvb/frontends/dib8000.c
+++ b/drivers/media/dvb/frontends/dib8000.c
@@ -10,6 +10,8 @@
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/i2c.h>
+#include <linux/mutex.h>
+
#include "dvb_math.h"
#include "dvb_frontend.h"
@@ -37,6 +39,7 @@
u8 addr;
u8 *i2c_write_buffer;
u8 *i2c_read_buffer;
+ struct mutex *i2c_buffer_lock;
};
struct dib8000_state {
@@ -77,6 +80,7 @@
struct i2c_msg msg[2];
u8 i2c_write_buffer[4];
u8 i2c_read_buffer[2];
+ struct mutex i2c_buffer_lock;
};
enum dib8000_power_mode {
@@ -86,24 +90,39 @@
static u16 dib8000_i2c_read16(struct i2c_device *i2c, u16 reg)
{
+ u16 ret;
struct i2c_msg msg[2] = {
- {.addr = i2c->addr >> 1, .flags = 0,
- .buf = i2c->i2c_write_buffer, .len = 2},
- {.addr = i2c->addr >> 1, .flags = I2C_M_RD,
- .buf = i2c->i2c_read_buffer, .len = 2},
+ {.addr = i2c->addr >> 1, .flags = 0, .len = 2},
+ {.addr = i2c->addr >> 1, .flags = I2C_M_RD, .len = 2},
};
+ if (mutex_lock_interruptible(i2c->i2c_buffer_lock) < 0) {
+ dprintk("could not acquire lock");
+ return 0;
+ }
+
+ msg[0].buf = i2c->i2c_write_buffer;
msg[0].buf[0] = reg >> 8;
msg[0].buf[1] = reg & 0xff;
+ msg[1].buf = i2c->i2c_read_buffer;
if (i2c_transfer(i2c->adap, msg, 2) != 2)
dprintk("i2c read error on %d", reg);
- return (msg[1].buf[0] << 8) | msg[1].buf[1];
+ ret = (msg[1].buf[0] << 8) | msg[1].buf[1];
+ mutex_unlock(i2c->i2c_buffer_lock);
+ return ret;
}
static u16 dib8000_read_word(struct dib8000_state *state, u16 reg)
{
+ u16 ret;
+
+ if (mutex_lock_interruptible(&state->i2c_buffer_lock) < 0) {
+ dprintk("could not acquire lock");
+ return 0;
+ }
+
state->i2c_write_buffer[0] = reg >> 8;
state->i2c_write_buffer[1] = reg & 0xff;
@@ -120,7 +139,10 @@
if (i2c_transfer(state->i2c.adap, state->msg, 2) != 2)
dprintk("i2c read error on %d", reg);
- return (state->i2c_read_buffer[0] << 8) | state->i2c_read_buffer[1];
+ ret = (state->i2c_read_buffer[0] << 8) | state->i2c_read_buffer[1];
+ mutex_unlock(&state->i2c_buffer_lock);
+
+ return ret;
}
static u32 dib8000_read32(struct dib8000_state *state, u16 reg)
@@ -135,22 +157,35 @@
static int dib8000_i2c_write16(struct i2c_device *i2c, u16 reg, u16 val)
{
- struct i2c_msg msg = {.addr = i2c->addr >> 1, .flags = 0,
- .buf = i2c->i2c_write_buffer, .len = 4};
+ struct i2c_msg msg = {.addr = i2c->addr >> 1, .flags = 0, .len = 4};
int ret = 0;
+ if (mutex_lock_interruptible(i2c->i2c_buffer_lock) < 0) {
+ dprintk("could not acquire lock");
+ return -EINVAL;
+ }
+
+ msg.buf = i2c->i2c_write_buffer;
msg.buf[0] = (reg >> 8) & 0xff;
msg.buf[1] = reg & 0xff;
msg.buf[2] = (val >> 8) & 0xff;
msg.buf[3] = val & 0xff;
ret = i2c_transfer(i2c->adap, &msg, 1) != 1 ? -EREMOTEIO : 0;
+ mutex_unlock(i2c->i2c_buffer_lock);
return ret;
}
static int dib8000_write_word(struct dib8000_state *state, u16 reg, u16 val)
{
+ int ret;
+
+ if (mutex_lock_interruptible(&state->i2c_buffer_lock) < 0) {
+ dprintk("could not acquire lock");
+ return -EINVAL;
+ }
+
state->i2c_write_buffer[0] = (reg >> 8) & 0xff;
state->i2c_write_buffer[1] = reg & 0xff;
state->i2c_write_buffer[2] = (val >> 8) & 0xff;
@@ -162,7 +197,11 @@
state->msg[0].buf = state->i2c_write_buffer;
state->msg[0].len = 4;
- return i2c_transfer(state->i2c.adap, state->msg, 1) != 1 ? -EREMOTEIO : 0;
+ ret = (i2c_transfer(state->i2c.adap, state->msg, 1) != 1 ?
+ -EREMOTEIO : 0);
+ mutex_unlock(&state->i2c_buffer_lock);
+
+ return ret;
}
static const s16 coeff_2k_sb_1seg_dqpsk[8] = {
@@ -2434,8 +2473,15 @@
if (!client.i2c_read_buffer) {
dprintk("%s: not enough memory", __func__);
ret = -ENOMEM;
- goto error_memory;
+ goto error_memory_read;
}
+ client.i2c_buffer_lock = kzalloc(sizeof(struct mutex), GFP_KERNEL);
+ if (!client.i2c_buffer_lock) {
+ dprintk("%s: not enough memory", __func__);
+ ret = -ENOMEM;
+ goto error_memory_lock;
+ }
+ mutex_init(client.i2c_buffer_lock);
for (k = no_of_demods - 1; k >= 0; k--) {
/* designated i2c address */
@@ -2476,8 +2522,10 @@
}
error:
+ kfree(client.i2c_buffer_lock);
+error_memory_lock:
kfree(client.i2c_read_buffer);
-error_memory:
+error_memory_read:
kfree(client.i2c_write_buffer);
return ret;
@@ -2581,6 +2629,8 @@
state->i2c.addr = i2c_addr;
state->i2c.i2c_write_buffer = state->i2c_write_buffer;
state->i2c.i2c_read_buffer = state->i2c_read_buffer;
+ mutex_init(&state->i2c_buffer_lock);
+ state->i2c.i2c_buffer_lock = &state->i2c_buffer_lock;
state->gpio_val = cfg->gpio_val;
state->gpio_dir = cfg->gpio_dir;
diff --git a/drivers/media/dvb/frontends/dib9000.c b/drivers/media/dvb/frontends/dib9000.c
index a085588..b931074 100644
--- a/drivers/media/dvb/frontends/dib9000.c
+++ b/drivers/media/dvb/frontends/dib9000.c
@@ -38,6 +38,15 @@
#define DibInitLock(lock) mutex_init(lock)
#define DibFreeLock(lock)
+struct dib9000_pid_ctrl {
+#define DIB9000_PID_FILTER_CTRL 0
+#define DIB9000_PID_FILTER 1
+ u8 cmd;
+ u8 id;
+ u16 pid;
+ u8 onoff;
+};
+
struct dib9000_state {
struct i2c_device i2c;
@@ -99,6 +108,10 @@
struct i2c_msg msg[2];
u8 i2c_write_buffer[255];
u8 i2c_read_buffer[255];
+ DIB_LOCK demod_lock;
+ u8 get_frontend_internal;
+ struct dib9000_pid_ctrl pid_ctrl[10];
+ s8 pid_ctrl_index; /* -1: empty list; -2: do not use the list */
};
static const u32 fe_info[44] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
@@ -1743,19 +1756,56 @@
int dib9000_fw_pid_filter_ctrl(struct dvb_frontend *fe, u8 onoff)
{
struct dib9000_state *state = fe->demodulator_priv;
- u16 val = dib9000_read_word(state, 294 + 1) & 0xffef;
+ u16 val;
+ int ret;
+
+ if ((state->pid_ctrl_index != -2) && (state->pid_ctrl_index < 9)) {
+ /* postpone the pid filtering cmd */
+ dprintk("pid filter cmd postpone");
+ state->pid_ctrl_index++;
+ state->pid_ctrl[state->pid_ctrl_index].cmd = DIB9000_PID_FILTER_CTRL;
+ state->pid_ctrl[state->pid_ctrl_index].onoff = onoff;
+ return 0;
+ }
+
+ DibAcquireLock(&state->demod_lock);
+
+ val = dib9000_read_word(state, 294 + 1) & 0xffef;
val |= (onoff & 0x1) << 4;
dprintk("PID filter enabled %d", onoff);
- return dib9000_write_word(state, 294 + 1, val);
+ ret = dib9000_write_word(state, 294 + 1, val);
+ DibReleaseLock(&state->demod_lock);
+ return ret;
+
}
EXPORT_SYMBOL(dib9000_fw_pid_filter_ctrl);
int dib9000_fw_pid_filter(struct dvb_frontend *fe, u8 id, u16 pid, u8 onoff)
{
struct dib9000_state *state = fe->demodulator_priv;
+ int ret;
+
+ if (state->pid_ctrl_index != -2) {
+ /* postpone the pid filtering cmd */
+ dprintk("pid filter postpone");
+ if (state->pid_ctrl_index < 9) {
+ state->pid_ctrl_index++;
+ state->pid_ctrl[state->pid_ctrl_index].cmd = DIB9000_PID_FILTER;
+ state->pid_ctrl[state->pid_ctrl_index].id = id;
+ state->pid_ctrl[state->pid_ctrl_index].pid = pid;
+ state->pid_ctrl[state->pid_ctrl_index].onoff = onoff;
+ } else
+ dprintk("can not add any more pid ctrl cmd");
+ return 0;
+ }
+
+ DibAcquireLock(&state->demod_lock);
dprintk("Index %x, PID %d, OnOff %d", id, pid, onoff);
- return dib9000_write_word(state, 300 + 1 + id, onoff ? (1 << 13) | pid : 0);
+ ret = dib9000_write_word(state, 300 + 1 + id,
+ onoff ? (1 << 13) | pid : 0);
+ DibReleaseLock(&state->demod_lock);
+ return ret;
}
EXPORT_SYMBOL(dib9000_fw_pid_filter);
@@ -1778,6 +1828,7 @@
DibFreeLock(&state->platform.risc.mbx_lock);
DibFreeLock(&state->platform.risc.mem_lock);
DibFreeLock(&state->platform.risc.mem_mbx_lock);
+ DibFreeLock(&state->demod_lock);
dibx000_exit_i2c_master(&st->i2c_master);
i2c_del_adapter(&st->tuner_adap);
@@ -1795,14 +1846,19 @@
{
struct dib9000_state *state = fe->demodulator_priv;
u8 index_frontend;
- int ret;
+ int ret = 0;
+ DibAcquireLock(&state->demod_lock);
for (index_frontend = 1; (index_frontend < MAX_NUMBER_OF_FRONTENDS) && (state->fe[index_frontend] != NULL); index_frontend++) {
ret = state->fe[index_frontend]->ops.sleep(state->fe[index_frontend]);
if (ret < 0)
- return ret;
+ goto error;
}
- return dib9000_mbx_send(state, OUT_MSG_FE_SLEEP, NULL, 0);
+ ret = dib9000_mbx_send(state, OUT_MSG_FE_SLEEP, NULL, 0);
+
+error:
+ DibReleaseLock(&state->demod_lock);
+ return ret;
}
static int dib9000_fe_get_tune_settings(struct dvb_frontend *fe, struct dvb_frontend_tune_settings *tune)
@@ -1816,7 +1872,10 @@
struct dib9000_state *state = fe->demodulator_priv;
u8 index_frontend, sub_index_frontend;
fe_status_t stat;
- int ret;
+ int ret = 0;
+
+ if (state->get_frontend_internal == 0)
+ DibAcquireLock(&state->demod_lock);
for (index_frontend = 1; (index_frontend < MAX_NUMBER_OF_FRONTENDS) && (state->fe[index_frontend] != NULL); index_frontend++) {
state->fe[index_frontend]->ops.read_status(state->fe[index_frontend], &stat);
@@ -1846,14 +1905,15 @@
state->fe[index_frontend]->dtv_property_cache.rolloff;
}
}
- return 0;
+ ret = 0;
+ goto return_value;
}
}
/* get the channel from master chip */
ret = dib9000_fw_get_channel(fe, fep);
if (ret != 0)
- return ret;
+ goto return_value;
/* synchronize the cache with the other frontends */
for (index_frontend = 1; (index_frontend < MAX_NUMBER_OF_FRONTENDS) && (state->fe[index_frontend] != NULL); index_frontend++) {
@@ -1866,8 +1926,12 @@
state->fe[index_frontend]->dtv_property_cache.code_rate_LP = fe->dtv_property_cache.code_rate_LP;
state->fe[index_frontend]->dtv_property_cache.rolloff = fe->dtv_property_cache.rolloff;
}
+ ret = 0;
- return 0;
+return_value:
+ if (state->get_frontend_internal == 0)
+ DibReleaseLock(&state->demod_lock);
+ return ret;
}
static int dib9000_set_tune_state(struct dvb_frontend *fe, enum frontend_tune_state tune_state)
@@ -1912,6 +1976,10 @@
dprintk("dib9000: must specify bandwidth ");
return 0;
}
+
+ state->pid_ctrl_index = -1; /* postpone the pid filtering cmd */
+ DibAcquireLock(&state->demod_lock);
+
fe->dtv_property_cache.delivery_system = SYS_DVBT;
/* set the master status */
@@ -1974,13 +2042,18 @@
/* check the tune result */
if (exit_condition == 1) { /* tune failed */
dprintk("tune failed");
+ DibReleaseLock(&state->demod_lock);
+ /* tune failed; put all the pid filtering cmd to junk */
+ state->pid_ctrl_index = -1;
return 0;
}
dprintk("tune success on frontend%i", index_frontend_success);
/* synchronize all the channel cache */
+ state->get_frontend_internal = 1;
dib9000_get_frontend(state->fe[0], fep);
+ state->get_frontend_internal = 0;
/* retune the other frontends with the found channel */
channel_status.status = CHANNEL_STATUS_PARAMETERS_SET;
@@ -2025,6 +2098,28 @@
/* turn off the diversity for the last frontend */
dib9000_fw_set_diversity_in(state->fe[index_frontend - 1], 0);
+ DibReleaseLock(&state->demod_lock);
+ if (state->pid_ctrl_index >= 0) {
+ u8 index_pid_filter_cmd;
+ u8 pid_ctrl_index = state->pid_ctrl_index;
+
+ state->pid_ctrl_index = -2;
+ for (index_pid_filter_cmd = 0;
+ index_pid_filter_cmd <= pid_ctrl_index;
+ index_pid_filter_cmd++) {
+ if (state->pid_ctrl[index_pid_filter_cmd].cmd == DIB9000_PID_FILTER_CTRL)
+ dib9000_fw_pid_filter_ctrl(state->fe[0],
+ state->pid_ctrl[index_pid_filter_cmd].onoff);
+ else if (state->pid_ctrl[index_pid_filter_cmd].cmd == DIB9000_PID_FILTER)
+ dib9000_fw_pid_filter(state->fe[0],
+ state->pid_ctrl[index_pid_filter_cmd].id,
+ state->pid_ctrl[index_pid_filter_cmd].pid,
+ state->pid_ctrl[index_pid_filter_cmd].onoff);
+ }
+ }
+ /* do not postpone any more the pid filtering */
+ state->pid_ctrl_index = -2;
+
return 0;
}
@@ -2041,6 +2136,7 @@
u8 index_frontend;
u16 lock = 0, lock_slave = 0;
+ DibAcquireLock(&state->demod_lock);
for (index_frontend = 1; (index_frontend < MAX_NUMBER_OF_FRONTENDS) && (state->fe[index_frontend] != NULL); index_frontend++)
lock_slave |= dib9000_read_lock(state->fe[index_frontend]);
@@ -2059,6 +2155,8 @@
if ((lock & 0x0008) || (lock_slave & 0x0008))
*stat |= FE_HAS_LOCK;
+ DibReleaseLock(&state->demod_lock);
+
return 0;
}
@@ -2066,10 +2164,14 @@
{
struct dib9000_state *state = fe->demodulator_priv;
u16 *c;
+ int ret = 0;
+ DibAcquireLock(&state->demod_lock);
DibAcquireLock(&state->platform.risc.mem_mbx_lock);
- if (dib9000_fw_memmbx_sync(state, FE_SYNC_CHANNEL) < 0)
- return -EIO;
+ if (dib9000_fw_memmbx_sync(state, FE_SYNC_CHANNEL) < 0) {
+ ret = -EIO;
+ goto error;
+ }
dib9000_risc_mem_read(state, FE_MM_R_FE_MONITOR,
state->i2c_read_buffer, 16 * 2);
DibReleaseLock(&state->platform.risc.mem_mbx_lock);
@@ -2077,7 +2179,10 @@
c = (u16 *)state->i2c_read_buffer;
*ber = c[10] << 16 | c[11];
- return 0;
+
+error:
+ DibReleaseLock(&state->demod_lock);
+ return ret;
}
static int dib9000_read_signal_strength(struct dvb_frontend *fe, u16 * strength)
@@ -2086,7 +2191,9 @@
u8 index_frontend;
u16 *c = (u16 *)state->i2c_read_buffer;
u16 val;
+ int ret = 0;
+ DibAcquireLock(&state->demod_lock);
*strength = 0;
for (index_frontend = 1; (index_frontend < MAX_NUMBER_OF_FRONTENDS) && (state->fe[index_frontend] != NULL); index_frontend++) {
state->fe[index_frontend]->ops.read_signal_strength(state->fe[index_frontend], &val);
@@ -2097,8 +2204,10 @@
}
DibAcquireLock(&state->platform.risc.mem_mbx_lock);
- if (dib9000_fw_memmbx_sync(state, FE_SYNC_CHANNEL) < 0)
- return -EIO;
+ if (dib9000_fw_memmbx_sync(state, FE_SYNC_CHANNEL) < 0) {
+ ret = -EIO;
+ goto error;
+ }
dib9000_risc_mem_read(state, FE_MM_R_FE_MONITOR, (u8 *) c, 16 * 2);
DibReleaseLock(&state->platform.risc.mem_mbx_lock);
@@ -2107,7 +2216,10 @@
*strength = 65535;
else
*strength += val;
- return 0;
+
+error:
+ DibReleaseLock(&state->demod_lock);
+ return ret;
}
static u32 dib9000_get_snr(struct dvb_frontend *fe)
@@ -2151,6 +2263,7 @@
u8 index_frontend;
u32 snr_master;
+ DibAcquireLock(&state->demod_lock);
snr_master = dib9000_get_snr(fe);
for (index_frontend = 1; (index_frontend < MAX_NUMBER_OF_FRONTENDS) && (state->fe[index_frontend] != NULL); index_frontend++)
snr_master += dib9000_get_snr(state->fe[index_frontend]);
@@ -2161,6 +2274,8 @@
} else
*snr = 0;
+ DibReleaseLock(&state->demod_lock);
+
return 0;
}
@@ -2168,15 +2283,22 @@
{
struct dib9000_state *state = fe->demodulator_priv;
u16 *c = (u16 *)state->i2c_read_buffer;
+ int ret = 0;
+ DibAcquireLock(&state->demod_lock);
DibAcquireLock(&state->platform.risc.mem_mbx_lock);
- if (dib9000_fw_memmbx_sync(state, FE_SYNC_CHANNEL) < 0)
- return -EIO;
+ if (dib9000_fw_memmbx_sync(state, FE_SYNC_CHANNEL) < 0) {
+ ret = -EIO;
+ goto error;
+ }
dib9000_risc_mem_read(state, FE_MM_R_FE_MONITOR, (u8 *) c, 16 * 2);
DibReleaseLock(&state->platform.risc.mem_mbx_lock);
*unc = c[12];
- return 0;
+
+error:
+ DibReleaseLock(&state->demod_lock);
+ return ret;
}
int dib9000_i2c_enumeration(struct i2c_adapter *i2c, int no_of_demods, u8 default_addr, u8 first_addr)
@@ -2322,6 +2444,10 @@
DibInitLock(&st->platform.risc.mbx_lock);
DibInitLock(&st->platform.risc.mem_lock);
DibInitLock(&st->platform.risc.mem_mbx_lock);
+ DibInitLock(&st->demod_lock);
+ st->get_frontend_internal = 0;
+
+ st->pid_ctrl_index = -2;
st->fe[0] = fe;
fe->demodulator_priv = st;
diff --git a/drivers/media/dvb/frontends/dibx000_common.c b/drivers/media/dvb/frontends/dibx000_common.c
index dc5d17a..774d507 100644
--- a/drivers/media/dvb/frontends/dibx000_common.c
+++ b/drivers/media/dvb/frontends/dibx000_common.c
@@ -1,4 +1,5 @@
#include <linux/i2c.h>
+#include <linux/mutex.h>
#include "dibx000_common.h"
@@ -10,6 +11,13 @@
static int dibx000_write_word(struct dibx000_i2c_master *mst, u16 reg, u16 val)
{
+ int ret;
+
+ if (mutex_lock_interruptible(&mst->i2c_buffer_lock) < 0) {
+ dprintk("could not acquire lock");
+ return -EINVAL;
+ }
+
mst->i2c_write_buffer[0] = (reg >> 8) & 0xff;
mst->i2c_write_buffer[1] = reg & 0xff;
mst->i2c_write_buffer[2] = (val >> 8) & 0xff;
@@ -21,11 +29,21 @@
mst->msg[0].buf = mst->i2c_write_buffer;
mst->msg[0].len = 4;
- return i2c_transfer(mst->i2c_adap, mst->msg, 1) != 1 ? -EREMOTEIO : 0;
+ ret = i2c_transfer(mst->i2c_adap, mst->msg, 1) != 1 ? -EREMOTEIO : 0;
+ mutex_unlock(&mst->i2c_buffer_lock);
+
+ return ret;
}
static u16 dibx000_read_word(struct dibx000_i2c_master *mst, u16 reg)
{
+ u16 ret;
+
+ if (mutex_lock_interruptible(&mst->i2c_buffer_lock) < 0) {
+ dprintk("could not acquire lock");
+ return 0;
+ }
+
mst->i2c_write_buffer[0] = reg >> 8;
mst->i2c_write_buffer[1] = reg & 0xff;
@@ -42,7 +60,10 @@
if (i2c_transfer(mst->i2c_adap, mst->msg, 2) != 2)
dprintk("i2c read error on %d", reg);
- return (mst->i2c_read_buffer[0] << 8) | mst->i2c_read_buffer[1];
+ ret = (mst->i2c_read_buffer[0] << 8) | mst->i2c_read_buffer[1];
+ mutex_unlock(&mst->i2c_buffer_lock);
+
+ return ret;
}
static int dibx000_is_i2c_done(struct dibx000_i2c_master *mst)
@@ -257,6 +278,7 @@
struct i2c_msg msg[], int num)
{
struct dibx000_i2c_master *mst = i2c_get_adapdata(i2c_adap);
+ int ret;
if (num > 32) {
dprintk("%s: too much I2C message to be transmitted (%i).\
@@ -264,10 +286,15 @@
return -ENOMEM;
}
- memset(mst->msg, 0, sizeof(struct i2c_msg) * (2 + num));
-
dibx000_i2c_select_interface(mst, DIBX000_I2C_INTERFACE_GPIO_6_7);
+ if (mutex_lock_interruptible(&mst->i2c_buffer_lock) < 0) {
+ dprintk("could not acquire lock");
+ return -EINVAL;
+ }
+
+ memset(mst->msg, 0, sizeof(struct i2c_msg) * (2 + num));
+
/* open the gate */
dibx000_i2c_gate_ctrl(mst, &mst->i2c_write_buffer[0], msg[0].addr, 1);
mst->msg[0].addr = mst->i2c_addr;
@@ -282,7 +309,11 @@
mst->msg[num + 1].buf = &mst->i2c_write_buffer[4];
mst->msg[num + 1].len = 4;
- return i2c_transfer(mst->i2c_adap, mst->msg, 2 + num) == 2 + num ? num : -EIO;
+ ret = (i2c_transfer(mst->i2c_adap, mst->msg, 2 + num) == 2 + num ?
+ num : -EIO);
+
+ mutex_unlock(&mst->i2c_buffer_lock);
+ return ret;
}
static struct i2c_algorithm dibx000_i2c_gated_gpio67_algo = {
@@ -294,6 +325,7 @@
struct i2c_msg msg[], int num)
{
struct dibx000_i2c_master *mst = i2c_get_adapdata(i2c_adap);
+ int ret;
if (num > 32) {
dprintk("%s: too much I2C message to be transmitted (%i).\
@@ -301,10 +333,14 @@
return -ENOMEM;
}
- memset(mst->msg, 0, sizeof(struct i2c_msg) * (2 + num));
-
dibx000_i2c_select_interface(mst, DIBX000_I2C_INTERFACE_TUNER);
+ if (mutex_lock_interruptible(&mst->i2c_buffer_lock) < 0) {
+ dprintk("could not acquire lock");
+ return -EINVAL;
+ }
+ memset(mst->msg, 0, sizeof(struct i2c_msg) * (2 + num));
+
/* open the gate */
dibx000_i2c_gate_ctrl(mst, &mst->i2c_write_buffer[0], msg[0].addr, 1);
mst->msg[0].addr = mst->i2c_addr;
@@ -319,7 +355,10 @@
mst->msg[num + 1].buf = &mst->i2c_write_buffer[4];
mst->msg[num + 1].len = 4;
- return i2c_transfer(mst->i2c_adap, mst->msg, 2 + num) == 2 + num ? num : -EIO;
+ ret = (i2c_transfer(mst->i2c_adap, mst->msg, 2 + num) == 2 + num ?
+ num : -EIO);
+ mutex_unlock(&mst->i2c_buffer_lock);
+ return ret;
}
static struct i2c_algorithm dibx000_i2c_gated_tuner_algo = {
@@ -390,8 +429,18 @@
int dibx000_init_i2c_master(struct dibx000_i2c_master *mst, u16 device_rev,
struct i2c_adapter *i2c_adap, u8 i2c_addr)
{
- u8 tx[4];
- struct i2c_msg m = {.addr = i2c_addr >> 1,.buf = tx,.len = 4 };
+ int ret;
+
+ mutex_init(&mst->i2c_buffer_lock);
+ if (mutex_lock_interruptible(&mst->i2c_buffer_lock) < 0) {
+ dprintk("could not acquire lock");
+ return -EINVAL;
+ }
+ memset(mst->msg, 0, sizeof(struct i2c_msg));
+ mst->msg[0].addr = i2c_addr >> 1;
+ mst->msg[0].flags = 0;
+ mst->msg[0].buf = mst->i2c_write_buffer;
+ mst->msg[0].len = 4;
mst->device_rev = device_rev;
mst->i2c_adap = i2c_adap;
@@ -431,9 +480,12 @@
"DiBX000: could not initialize the master i2c_adapter\n");
/* initialize the i2c-master by closing the gate */
- dibx000_i2c_gate_ctrl(mst, tx, 0, 0);
+ dibx000_i2c_gate_ctrl(mst, mst->i2c_write_buffer, 0, 0);
- return i2c_transfer(i2c_adap, &m, 1) == 1;
+ ret = (i2c_transfer(i2c_adap, mst->msg, 1) == 1);
+ mutex_unlock(&mst->i2c_buffer_lock);
+
+ return ret;
}
EXPORT_SYMBOL(dibx000_init_i2c_master);
diff --git a/drivers/media/dvb/frontends/dibx000_common.h b/drivers/media/dvb/frontends/dibx000_common.h
index f031165..5e01147 100644
--- a/drivers/media/dvb/frontends/dibx000_common.h
+++ b/drivers/media/dvb/frontends/dibx000_common.h
@@ -33,6 +33,7 @@
struct i2c_msg msg[34];
u8 i2c_write_buffer[8];
u8 i2c_read_buffer[2];
+ struct mutex i2c_buffer_lock;
};
extern int dibx000_init_i2c_master(struct dibx000_i2c_master *mst,