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path: root/drivers/media/dvb/b2c2/flexcop-sram.c
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Diffstat (limited to 'drivers/media/dvb/b2c2/flexcop-sram.c')
-rw-r--r--drivers/media/dvb/b2c2/flexcop-sram.c112
1 files changed, 36 insertions, 76 deletions
diff --git a/drivers/media/dvb/b2c2/flexcop-sram.c b/drivers/media/dvb/b2c2/flexcop-sram.c
index cda69528548a..f2199e43e803 100644
--- a/drivers/media/dvb/b2c2/flexcop-sram.c
+++ b/drivers/media/dvb/b2c2/flexcop-sram.c
@@ -1,45 +1,43 @@
/*
- * This file is part of linux driver the digital TV devices equipped with B2C2 FlexcopII(b)/III
- *
- * flexcop-sram.c - functions for controlling the SRAM.
- *
- * see flexcop.c for copyright information.
+ * Linux driver for digital TV devices equipped with B2C2 FlexcopII(b)/III
+ * flexcop-sram.c - functions for controlling the SRAM
+ * see flexcop.c for copyright information
*/
#include "flexcop.h"
-static void flexcop_sram_set_chip (struct flexcop_device *fc, flexcop_sram_type_t type)
+static void flexcop_sram_set_chip(struct flexcop_device *fc,
+ flexcop_sram_type_t type)
{
- flexcop_set_ibi_value(wan_ctrl_reg_71c,sram_chip,type);
+ flexcop_set_ibi_value(wan_ctrl_reg_71c, sram_chip, type);
}
int flexcop_sram_init(struct flexcop_device *fc)
{
switch (fc->rev) {
- case FLEXCOP_II:
- case FLEXCOP_IIB:
- flexcop_sram_set_chip(fc,FC_SRAM_1_32KB);
- break;
- case FLEXCOP_III:
- flexcop_sram_set_chip(fc,FC_SRAM_1_48KB);
- break;
- default:
- return -EINVAL;
+ case FLEXCOP_II:
+ case FLEXCOP_IIB:
+ flexcop_sram_set_chip(fc, FC_SRAM_1_32KB);
+ break;
+ case FLEXCOP_III:
+ flexcop_sram_set_chip(fc, FC_SRAM_1_48KB);
+ break;
+ default:
+ return -EINVAL;
}
return 0;
}
-int flexcop_sram_set_dest(struct flexcop_device *fc, flexcop_sram_dest_t dest, flexcop_sram_dest_target_t target)
+int flexcop_sram_set_dest(struct flexcop_device *fc, flexcop_sram_dest_t dest,
+ flexcop_sram_dest_target_t target)
{
flexcop_ibi_value v;
-
- v = fc->read_ibi_reg(fc,sram_dest_reg_714);
+ v = fc->read_ibi_reg(fc, sram_dest_reg_714);
if (fc->rev != FLEXCOP_III && target == FC_SRAM_DEST_TARGET_FC3_CA) {
err("SRAM destination target to available on FlexCopII(b)\n");
return -EINVAL;
}
-
- deb_sram("sram dest: %x target: %x\n",dest, target);
+ deb_sram("sram dest: %x target: %x\n", dest, target);
if (dest & FC_SRAM_DEST_NET)
v.sram_dest_reg_714.NET_Dest = target;
@@ -154,14 +152,12 @@ static void sram_write_chunk(struct adapter *adapter, u32 addr, u8 *buf, u16 len
else
bank = 0x10000000;
}
-
flex_sram_write(adapter, bank, addr & 0x7fff, buf, len);
}
static void sram_read_chunk(struct adapter *adapter, u32 addr, u8 *buf, u16 len)
{
u32 bank;
-
bank = 0;
if (adapter->dw_sram_type == 0x20000) {
@@ -174,26 +170,22 @@ static void sram_read_chunk(struct adapter *adapter, u32 addr, u8 *buf, u16 len)
else
bank = 0x10000000;
}
-
flex_sram_read(adapter, bank, addr & 0x7fff, buf, len);
}
static void sram_read(struct adapter *adapter, u32 addr, u8 *buf, u32 len)
{
u32 length;
-
while (len != 0) {
length = len;
-
- // check if the address range belongs to the same
- // 32K memory chip. If not, the data is read from
- // one chip at a time.
+ /* check if the address range belongs to the same
+ * 32K memory chip. If not, the data is read
+ * from one chip at a time */
if ((addr >> 0x0f) != ((addr + len - 1) >> 0x0f)) {
length = (((addr >> 0x0f) + 1) << 0x0f) - addr;
}
sram_read_chunk(adapter, addr, buf, length);
-
addr = addr + length;
buf = buf + length;
len = len - length;
@@ -203,19 +195,17 @@ static void sram_read(struct adapter *adapter, u32 addr, u8 *buf, u32 len)
static void sram_write(struct adapter *adapter, u32 addr, u8 *buf, u32 len)
{
u32 length;
-
while (len != 0) {
length = len;
- // check if the address range belongs to the same
- // 32K memory chip. If not, the data is written to
- // one chip at a time.
+ /* check if the address range belongs to the same
+ * 32K memory chip. If not, the data is
+ * written to one chip at a time */
if ((addr >> 0x0f) != ((addr + len - 1) >> 0x0f)) {
length = (((addr >> 0x0f) + 1) << 0x0f) - addr;
}
sram_write_chunk(adapter, addr, buf, length);
-
addr = addr + length;
buf = buf + length;
len = len - length;
@@ -224,39 +214,29 @@ static void sram_write(struct adapter *adapter, u32 addr, u8 *buf, u32 len)
static void sram_set_size(struct adapter *adapter, u32 mask)
{
- write_reg_dw(adapter, 0x71c, (mask | (~0x30000 & read_reg_dw(adapter, 0x71c))));
+ write_reg_dw(adapter, 0x71c,
+ (mask | (~0x30000 & read_reg_dw(adapter, 0x71c))));
}
static void sram_init(struct adapter *adapter)
{
u32 tmp;
-
tmp = read_reg_dw(adapter, 0x71c);
-
write_reg_dw(adapter, 0x71c, 1);
if (read_reg_dw(adapter, 0x71c) != 0) {
write_reg_dw(adapter, 0x71c, tmp);
-
adapter->dw_sram_type = tmp & 0x30000;
-
ddprintk("%s: dw_sram_type = %x\n", __func__, adapter->dw_sram_type);
-
} else {
-
adapter->dw_sram_type = 0x10000;
-
ddprintk("%s: dw_sram_type = %x\n", __func__, adapter->dw_sram_type);
}
-
- /* return value is never used? */
-/* return adapter->dw_sram_type; */
}
static int sram_test_location(struct adapter *adapter, u32 mask, u32 addr)
{
u8 tmp1, tmp2;
-
dprintk("%s: mask = %x, addr = %x\n", __func__, mask, addr);
sram_set_size(adapter, mask);
@@ -269,7 +249,6 @@ static int sram_test_location(struct adapter *adapter, u32 mask, u32 addr)
sram_write(adapter, addr + 4, &tmp1, 1);
tmp2 = 0;
-
mdelay(20);
sram_read(adapter, addr, &tmp2, 1);
@@ -287,7 +266,6 @@ static int sram_test_location(struct adapter *adapter, u32 mask, u32 addr)
sram_write(adapter, addr + 4, &tmp1, 1);
tmp2 = 0;
-
mdelay(20);
sram_read(adapter, addr, &tmp2, 1);
@@ -297,26 +275,24 @@ static int sram_test_location(struct adapter *adapter, u32 mask, u32 addr)
if (tmp2 != 0x5a)
return 0;
-
return 1;
}
static u32 sram_length(struct adapter *adapter)
{
if (adapter->dw_sram_type == 0x10000)
- return 32768; // 32K
+ return 32768; /* 32K */
if (adapter->dw_sram_type == 0x00000)
- return 65536; // 64K
+ return 65536; /* 64K */
if (adapter->dw_sram_type == 0x20000)
- return 131072; // 128K
-
- return 32768; // 32K
+ return 131072; /* 128K */
+ return 32768; /* 32K */
}
/* FlexcopII can work with 32K, 64K or 128K of external SRAM memory.
- - for 128K there are 4x32K chips at bank 0,1,2,3.
- - for 64K there are 2x32K chips at bank 1,2.
- - for 32K there is one 32K chip at bank 0.
+ - for 128K there are 4x32K chips at bank 0,1,2,3.
+ - for 64K there are 2x32K chips at bank 1,2.
+ - for 32K there is one 32K chip at bank 0.
FlexCop works only with one bank at a time. The bank is selected
by bits 28-29 of the 0x700 register.
@@ -324,24 +300,18 @@ static u32 sram_length(struct adapter *adapter)
bank 0 covers addresses 0x00000-0x07fff
bank 1 covers addresses 0x08000-0x0ffff
bank 2 covers addresses 0x10000-0x17fff
- bank 3 covers addresses 0x18000-0x1ffff
-*/
+ bank 3 covers addresses 0x18000-0x1ffff */
static int flexcop_sram_detect(struct flexcop_device *fc)
{
- flexcop_ibi_value r208,r71c_0,vr71c_1;
-
+ flexcop_ibi_value r208, r71c_0, vr71c_1;
r208 = fc->read_ibi_reg(fc, ctrl_208);
fc->write_ibi_reg(fc, ctrl_208, ibi_zero);
r71c_0 = fc->read_ibi_reg(fc, wan_ctrl_reg_71c);
-
write_reg_dw(adapter, 0x71c, 1);
-
tmp3 = read_reg_dw(adapter, 0x71c);
-
dprintk("%s: tmp3 = %x\n", __func__, tmp3);
-
write_reg_dw(adapter, 0x71c, tmp2);
// check for internal SRAM ???
@@ -350,9 +320,7 @@ static int flexcop_sram_detect(struct flexcop_device *fc)
sram_set_size(adapter, 0x10000);
sram_init(adapter);
write_reg_dw(adapter, 0x208, tmp);
-
dprintk("%s: sram size = 32K\n", __func__);
-
return 32;
}
@@ -360,9 +328,7 @@ static int flexcop_sram_detect(struct flexcop_device *fc)
sram_set_size(adapter, 0x20000);
sram_init(adapter);
write_reg_dw(adapter, 0x208, tmp);
-
dprintk("%s: sram size = 128K\n", __func__);
-
return 128;
}
@@ -370,9 +336,7 @@ static int flexcop_sram_detect(struct flexcop_device *fc)
sram_set_size(adapter, 0x00000);
sram_init(adapter);
write_reg_dw(adapter, 0x208, tmp);
-
dprintk("%s: sram size = 64K\n", __func__);
-
return 64;
}
@@ -380,18 +344,14 @@ static int flexcop_sram_detect(struct flexcop_device *fc)
sram_set_size(adapter, 0x10000);
sram_init(adapter);
write_reg_dw(adapter, 0x208, tmp);
-
dprintk("%s: sram size = 32K\n", __func__);
-
return 32;
}
sram_set_size(adapter, 0x10000);
sram_init(adapter);
write_reg_dw(adapter, 0x208, tmp);
-
dprintk("%s: SRAM detection failed. Set to 32K \n", __func__);
-
return 0;
}
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