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thunderbolt: Rename EEPROM handling bits to match USB4 spec

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The structure `tb_eeprom_ctl` is used to show the bits accessed when
reading/writing EEPROM.

As this structure is specified in the USB4 spec as `VSC_CS_4` update
the names and use of members to match the specification. This should not
change anything functionally.

Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
This commit is contained in:
Mario Limonciello 2022-03-03 07:13:28 -06:00 committed by Mika Westerberg
parent 51d4d64c7c
commit 144c4a77a3
2 changed files with 17 additions and 17 deletions
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24
drivers/thunderbolt/eeprom.c
View File

@ -17,7 +17,7 @@
*/
static int tb_eeprom_ctl_write(struct tb_switch *sw, struct tb_eeprom_ctl *ctl)
{
return tb_sw_write(sw, ctl, TB_CFG_SWITCH, sw->cap_plug_events + 4, 1);
return tb_sw_write(sw, ctl, TB_CFG_SWITCH, sw->cap_plug_events + ROUTER_CS_4, 1);
}
/*
@ -25,7 +25,7 @@ static int tb_eeprom_ctl_write(struct tb_switch *sw, struct tb_eeprom_ctl *ctl)
*/
static int tb_eeprom_ctl_read(struct tb_switch *sw, struct tb_eeprom_ctl *ctl)
{
return tb_sw_read(sw, ctl, TB_CFG_SWITCH, sw->cap_plug_events + 4, 1);
return tb_sw_read(sw, ctl, TB_CFG_SWITCH, sw->cap_plug_events + ROUTER_CS_4, 1);
}
enum tb_eeprom_transfer {
@ -46,18 +46,18 @@ static int tb_eeprom_active(struct tb_switch *sw, bool enable)
if (res)
return res;
if (enable) {
ctl.access_high = 1;
ctl.bit_banging_enable = 1;
res = tb_eeprom_ctl_write(sw, &ctl);
if (res)
return res;
ctl.access_low = 0;
ctl.fl_cs = 0;
return tb_eeprom_ctl_write(sw, &ctl);
} else {
ctl.access_low = 1;
ctl.fl_cs = 1;
res = tb_eeprom_ctl_write(sw, &ctl);
if (res)
return res;
ctl.access_high = 0;
ctl.bit_banging_enable = 0;
return tb_eeprom_ctl_write(sw, &ctl);
}
}
@ -65,8 +65,8 @@ static int tb_eeprom_active(struct tb_switch *sw, bool enable)
/*
* tb_eeprom_transfer - transfer one bit
*
* If TB_EEPROM_IN is passed, then the bit can be retrieved from ctl->data_in.
* If TB_EEPROM_OUT is passed, then ctl->data_out will be written.
* If TB_EEPROM_IN is passed, then the bit can be retrieved from ctl->fl_do.
* If TB_EEPROM_OUT is passed, then ctl->fl_di will be written.
*/
static int tb_eeprom_transfer(struct tb_switch *sw, struct tb_eeprom_ctl *ctl,
enum tb_eeprom_transfer direction)
@ -77,7 +77,7 @@ static int tb_eeprom_transfer(struct tb_switch *sw, struct tb_eeprom_ctl *ctl,
if (res)
return res;
}
ctl->clock = 1;
ctl->fl_sk = 1;
res = tb_eeprom_ctl_write(sw, ctl);
if (res)
return res;
@ -86,7 +86,7 @@ static int tb_eeprom_transfer(struct tb_switch *sw, struct tb_eeprom_ctl *ctl,
if (res)
return res;
}
ctl->clock = 0;
ctl->fl_sk = 0;
return tb_eeprom_ctl_write(sw, ctl);
}
@ -101,7 +101,7 @@ static int tb_eeprom_out(struct tb_switch *sw, u8 val)
if (res)
return res;
for (i = 0; i < 8; i++) {
ctl.data_out = val & 0x80;
ctl.fl_di = val & 0x80;
res = tb_eeprom_transfer(sw, &ctl, TB_EEPROM_OUT);
if (res)
return res;
@ -126,7 +126,7 @@ static int tb_eeprom_in(struct tb_switch *sw, u8 *val)
res = tb_eeprom_transfer(sw, &ctl, TB_EEPROM_IN);
if (res)
return res;
*val |= ctl.data_in;
*val |= ctl.fl_do;
}
return 0;
}

10
drivers/thunderbolt/tb_regs.h
View File

@ -133,11 +133,11 @@ struct tb_cap_phy {
} __packed;
struct tb_eeprom_ctl {
bool clock:1; /* send pulse to transfer one bit */
bool access_low:1; /* set to 0 before access */
bool data_out:1; /* to eeprom */
bool data_in:1; /* from eeprom */
bool access_high:1; /* set to 1 before access */
bool fl_sk:1; /* send pulse to transfer one bit */
bool fl_cs:1; /* set to 0 before access */
bool fl_di:1; /* to eeprom */
bool fl_do:1; /* from eeprom */
bool bit_banging_enable:1; /* set to 1 before access */
bool not_present:1; /* should be 0 */
bool unknown1:1;
bool present:1; /* should be 1 */