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path: root/drivers/media/dvb/b2c2/flexcop-i2c.c
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Diffstat (limited to 'drivers/media/dvb/b2c2/flexcop-i2c.c')
-rw-r--r--drivers/media/dvb/b2c2/flexcop-i2c.c61
1 files changed, 34 insertions, 27 deletions
diff --git a/drivers/media/dvb/b2c2/flexcop-i2c.c b/drivers/media/dvb/b2c2/flexcop-i2c.c
index f13783f08f0..e2bed507648 100644
--- a/drivers/media/dvb/b2c2/flexcop-i2c.c
+++ b/drivers/media/dvb/b2c2/flexcop-i2c.c
@@ -1,17 +1,14 @@
/*
- * This file is part of linux driver the digital TV devices equipped with B2C2 FlexcopII(b)/III
- *
+ * Linux driver for digital TV devices equipped with B2C2 FlexcopII(b)/III
* flexcop-i2c.c - flexcop internal 2Wire bus (I2C) and dvb i2c initialization
- *
- * see flexcop.c for copyright information.
+ * see flexcop.c for copyright information
*/
#include "flexcop.h"
#define FC_MAX_I2C_RETRIES 100000
-/* #define DUMP_I2C_MESSAGES */
-
-static int flexcop_i2c_operation(struct flexcop_device *fc, flexcop_ibi_value *r100)
+static int flexcop_i2c_operation(struct flexcop_device *fc,
+ flexcop_ibi_value *r100)
{
int i;
flexcop_ibi_value r;
@@ -26,7 +23,7 @@ static int flexcop_i2c_operation(struct flexcop_device *fc, flexcop_ibi_value *r
r = fc->read_ibi_reg(fc, tw_sm_c_100);
if (!r.tw_sm_c_100.no_base_addr_ack_error) {
- if (r.tw_sm_c_100.st_done) { /* && !r.tw_sm_c_100.working_start */
+ if (r.tw_sm_c_100.st_done) {
*r100 = r;
deb_i2c("i2c success\n");
return 0;
@@ -36,17 +33,31 @@ static int flexcop_i2c_operation(struct flexcop_device *fc, flexcop_ibi_value *r
return -EREMOTEIO;
}
}
- deb_i2c("tried %d times i2c operation, never finished or too many ack errors.\n",i);
+ deb_i2c("tried %d times i2c operation, "
+ "never finished or too many ack errors.\n", i);
return -EREMOTEIO;
}
static int flexcop_i2c_read4(struct flexcop_i2c_adapter *i2c,
- flexcop_ibi_value r100, u8 *buf)
+ flexcop_ibi_value r100, u8 *buf)
{
flexcop_ibi_value r104;
- int len = r100.tw_sm_c_100.total_bytes, /* remember total_bytes is buflen-1 */
+ int len = r100.tw_sm_c_100.total_bytes,
+ /* remember total_bytes is buflen-1 */
ret;
+ /* work-around to have CableStar2 and SkyStar2 rev 2.7 work
+ * correctly:
+ *
+ * the ITD1000 is behind an i2c-gate which closes automatically
+ * after an i2c-transaction the STV0297 needs 2 consecutive reads
+ * one with no_base_addr = 0 and one with 1
+ *
+ * those two work-arounds are conflictin: we check for the card
+ * type, it is set when probing the ITD1000 */
+ if (i2c->fc->dev_type == FC_SKY_REV27)
+ r100.tw_sm_c_100.no_base_addr_ack_error = i2c->no_base_addr;
+
ret = flexcop_i2c_operation(i2c->fc, &r100);
if (ret != 0) {
deb_i2c("Retrying operation\n");
@@ -69,11 +80,11 @@ static int flexcop_i2c_read4(struct flexcop_i2c_adapter *i2c,
if (len > 1) buf[2] = r104.tw_sm_c_104.data3_reg;
if (len > 2) buf[3] = r104.tw_sm_c_104.data4_reg;
}
-
return 0;
}
-static int flexcop_i2c_write4(struct flexcop_device *fc, flexcop_ibi_value r100, u8 *buf)
+static int flexcop_i2c_write4(struct flexcop_device *fc,
+ flexcop_ibi_value r100, u8 *buf)
{
flexcop_ibi_value r104;
int len = r100.tw_sm_c_100.total_bytes; /* remember total_bytes is buflen-1 */
@@ -81,7 +92,6 @@ static int flexcop_i2c_write4(struct flexcop_device *fc, flexcop_ibi_value r100,
/* there is at least one byte, otherwise we wouldn't be here */
r100.tw_sm_c_100.data1_reg = buf[0];
-
r104.tw_sm_c_104.data2_reg = len > 0 ? buf[1] : 0;
r104.tw_sm_c_104.data3_reg = len > 1 ? buf[2] : 0;
r104.tw_sm_c_104.data4_reg = len > 2 ? buf[3] : 0;
@@ -94,7 +104,7 @@ static int flexcop_i2c_write4(struct flexcop_device *fc, flexcop_ibi_value r100,
}
int flexcop_i2c_request(struct flexcop_i2c_adapter *i2c,
- flexcop_access_op_t op, u8 chipaddr, u8 addr, u8 *buf, u16 len)
+ flexcop_access_op_t op, u8 chipaddr, u8 addr, u8 *buf, u16 len)
{
int ret;
@@ -117,7 +127,6 @@ int flexcop_i2c_request(struct flexcop_i2c_adapter *i2c,
printk("rd(");
else
printk("wr(");
-
printk("%02x): %02x ", chipaddr, addr);
#endif
@@ -163,7 +172,8 @@ int flexcop_i2c_request(struct flexcop_i2c_adapter *i2c,
EXPORT_SYMBOL(flexcop_i2c_request);
/* master xfer callback for demodulator */
-static int flexcop_master_xfer(struct i2c_adapter *i2c_adap, struct i2c_msg msgs[], int num)
+static int flexcop_master_xfer(struct i2c_adapter *i2c_adap,
+ struct i2c_msg msgs[], int num)
{
struct flexcop_i2c_adapter *i2c = i2c_get_adapdata(i2c_adap);
int i, ret = 0;
@@ -182,12 +192,13 @@ static int flexcop_master_xfer(struct i2c_adapter *i2c_adap, struct i2c_msg msgs
/* reading */
if (i+1 < num && (msgs[i+1].flags == I2C_M_RD)) {
ret = i2c->fc->i2c_request(i2c, FC_READ, msgs[i].addr,
- msgs[i].buf[0], msgs[i+1].buf, msgs[i+1].len);
+ msgs[i].buf[0], msgs[i+1].buf,
+ msgs[i+1].len);
i++; /* skip the following message */
} else /* writing */
ret = i2c->fc->i2c_request(i2c, FC_WRITE, msgs[i].addr,
- msgs[i].buf[0], &msgs[i].buf[1],
- msgs[i].len - 1);
+ msgs[i].buf[0], &msgs[i].buf[1],
+ msgs[i].len - 1);
if (ret < 0) {
err("i2c master_xfer failed");
break;
@@ -214,23 +225,21 @@ static struct i2c_algorithm flexcop_algo = {
int flexcop_i2c_init(struct flexcop_device *fc)
{
int ret;
-
mutex_init(&fc->i2c_mutex);
fc->fc_i2c_adap[0].fc = fc;
fc->fc_i2c_adap[1].fc = fc;
fc->fc_i2c_adap[2].fc = fc;
-
fc->fc_i2c_adap[0].port = FC_I2C_PORT_DEMOD;
fc->fc_i2c_adap[1].port = FC_I2C_PORT_EEPROM;
fc->fc_i2c_adap[2].port = FC_I2C_PORT_TUNER;
strlcpy(fc->fc_i2c_adap[0].i2c_adap.name, "B2C2 FlexCop I2C to demod",
- sizeof(fc->fc_i2c_adap[0].i2c_adap.name));
+ sizeof(fc->fc_i2c_adap[0].i2c_adap.name));
strlcpy(fc->fc_i2c_adap[1].i2c_adap.name, "B2C2 FlexCop I2C to eeprom",
- sizeof(fc->fc_i2c_adap[1].i2c_adap.name));
+ sizeof(fc->fc_i2c_adap[1].i2c_adap.name));
strlcpy(fc->fc_i2c_adap[2].i2c_adap.name, "B2C2 FlexCop I2C to tuner",
- sizeof(fc->fc_i2c_adap[2].i2c_adap.name));
+ sizeof(fc->fc_i2c_adap[2].i2c_adap.name));
i2c_set_adapdata(&fc->fc_i2c_adap[0].i2c_adap, &fc->fc_i2c_adap[0]);
i2c_set_adapdata(&fc->fc_i2c_adap[1].i2c_adap, &fc->fc_i2c_adap[1]);
@@ -268,7 +277,6 @@ adap_2_failed:
i2c_del_adapter(&fc->fc_i2c_adap[1].i2c_adap);
adap_1_failed:
i2c_del_adapter(&fc->fc_i2c_adap[0].i2c_adap);
-
return ret;
}
@@ -279,6 +287,5 @@ void flexcop_i2c_exit(struct flexcop_device *fc)
i2c_del_adapter(&fc->fc_i2c_adap[1].i2c_adap);
i2c_del_adapter(&fc->fc_i2c_adap[0].i2c_adap);
}
-
fc->init_state &= ~FC_STATE_I2C_INIT;
}
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-11-29 09:15:31 +0000