forked from luck/tmp_suning_uos_patched
22712b389e
Add support to the CEC Pin framework to parse error injection commands and to show them. The next patch will do the actual implementation of this. Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
343 lines
11 KiB
C
343 lines
11 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* Copyright 2017 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
|
|
*/
|
|
|
|
#include <linux/delay.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/sched/types.h>
|
|
|
|
#include <media/cec-pin.h>
|
|
#include "cec-pin-priv.h"
|
|
|
|
struct cec_error_inj_cmd {
|
|
unsigned int mode_offset;
|
|
int arg_idx;
|
|
const char *cmd;
|
|
};
|
|
|
|
static const struct cec_error_inj_cmd cec_error_inj_cmds[] = {
|
|
{ CEC_ERROR_INJ_RX_NACK_OFFSET, -1, "rx-nack" },
|
|
{ CEC_ERROR_INJ_RX_LOW_DRIVE_OFFSET,
|
|
CEC_ERROR_INJ_RX_LOW_DRIVE_ARG_IDX, "rx-low-drive" },
|
|
{ CEC_ERROR_INJ_RX_ADD_BYTE_OFFSET, -1, "rx-add-byte" },
|
|
{ CEC_ERROR_INJ_RX_REMOVE_BYTE_OFFSET, -1, "rx-remove-byte" },
|
|
{ CEC_ERROR_INJ_RX_ARB_LOST_OFFSET,
|
|
CEC_ERROR_INJ_RX_ARB_LOST_ARG_IDX, "rx-arb-lost" },
|
|
|
|
{ CEC_ERROR_INJ_TX_NO_EOM_OFFSET, -1, "tx-no-eom" },
|
|
{ CEC_ERROR_INJ_TX_EARLY_EOM_OFFSET, -1, "tx-early-eom" },
|
|
{ CEC_ERROR_INJ_TX_ADD_BYTES_OFFSET,
|
|
CEC_ERROR_INJ_TX_ADD_BYTES_ARG_IDX, "tx-add-bytes" },
|
|
{ CEC_ERROR_INJ_TX_REMOVE_BYTE_OFFSET, -1, "tx-remove-byte" },
|
|
{ CEC_ERROR_INJ_TX_SHORT_BIT_OFFSET,
|
|
CEC_ERROR_INJ_TX_SHORT_BIT_ARG_IDX, "tx-short-bit" },
|
|
{ CEC_ERROR_INJ_TX_LONG_BIT_OFFSET,
|
|
CEC_ERROR_INJ_TX_LONG_BIT_ARG_IDX, "tx-long-bit" },
|
|
{ CEC_ERROR_INJ_TX_CUSTOM_BIT_OFFSET,
|
|
CEC_ERROR_INJ_TX_CUSTOM_BIT_ARG_IDX, "tx-custom-bit" },
|
|
{ CEC_ERROR_INJ_TX_SHORT_START_OFFSET, -1, "tx-short-start" },
|
|
{ CEC_ERROR_INJ_TX_LONG_START_OFFSET, -1, "tx-long-start" },
|
|
{ CEC_ERROR_INJ_TX_CUSTOM_START_OFFSET, -1, "tx-custom-start" },
|
|
{ CEC_ERROR_INJ_TX_LAST_BIT_OFFSET,
|
|
CEC_ERROR_INJ_TX_LAST_BIT_ARG_IDX, "tx-last-bit" },
|
|
{ CEC_ERROR_INJ_TX_LOW_DRIVE_OFFSET,
|
|
CEC_ERROR_INJ_TX_LOW_DRIVE_ARG_IDX, "tx-low-drive" },
|
|
{ 0, -1, NULL }
|
|
};
|
|
|
|
u16 cec_pin_rx_error_inj(struct cec_pin *pin)
|
|
{
|
|
u16 cmd = CEC_ERROR_INJ_OP_ANY;
|
|
|
|
/* Only when 18 bits have been received do we have a valid cmd */
|
|
if (!(pin->error_inj[cmd] & CEC_ERROR_INJ_RX_MASK) &&
|
|
pin->rx_bit >= 18)
|
|
cmd = pin->rx_msg.msg[1];
|
|
return (pin->error_inj[cmd] & CEC_ERROR_INJ_RX_MASK) ? cmd :
|
|
CEC_ERROR_INJ_OP_ANY;
|
|
}
|
|
|
|
u16 cec_pin_tx_error_inj(struct cec_pin *pin)
|
|
{
|
|
u16 cmd = CEC_ERROR_INJ_OP_ANY;
|
|
|
|
if (!(pin->error_inj[cmd] & CEC_ERROR_INJ_TX_MASK) &&
|
|
pin->tx_msg.len > 1)
|
|
cmd = pin->tx_msg.msg[1];
|
|
return (pin->error_inj[cmd] & CEC_ERROR_INJ_TX_MASK) ? cmd :
|
|
CEC_ERROR_INJ_OP_ANY;
|
|
}
|
|
|
|
bool cec_pin_error_inj_parse_line(struct cec_adapter *adap, char *line)
|
|
{
|
|
static const char *delims = " \t\r";
|
|
struct cec_pin *pin = adap->pin;
|
|
unsigned int i;
|
|
bool has_pos = false;
|
|
char *p = line;
|
|
char *token;
|
|
char *comma;
|
|
u64 *error;
|
|
u8 *args;
|
|
bool has_op;
|
|
u32 op;
|
|
u8 mode;
|
|
u8 pos;
|
|
u8 v;
|
|
|
|
p = skip_spaces(p);
|
|
token = strsep(&p, delims);
|
|
if (!strcmp(token, "clear")) {
|
|
memset(pin->error_inj, 0, sizeof(pin->error_inj));
|
|
pin->rx_toggle = pin->tx_toggle = false;
|
|
pin->tx_ignore_nack_until_eom = false;
|
|
pin->tx_custom_pulse = false;
|
|
pin->tx_custom_low_usecs = CEC_TIM_CUSTOM_DEFAULT;
|
|
pin->tx_custom_high_usecs = CEC_TIM_CUSTOM_DEFAULT;
|
|
return true;
|
|
}
|
|
if (!strcmp(token, "rx-clear")) {
|
|
for (i = 0; i <= CEC_ERROR_INJ_OP_ANY; i++)
|
|
pin->error_inj[i] &= ~CEC_ERROR_INJ_RX_MASK;
|
|
pin->rx_toggle = false;
|
|
return true;
|
|
}
|
|
if (!strcmp(token, "tx-clear")) {
|
|
for (i = 0; i <= CEC_ERROR_INJ_OP_ANY; i++)
|
|
pin->error_inj[i] &= ~CEC_ERROR_INJ_TX_MASK;
|
|
pin->tx_toggle = false;
|
|
pin->tx_ignore_nack_until_eom = false;
|
|
pin->tx_custom_pulse = false;
|
|
pin->tx_custom_low_usecs = CEC_TIM_CUSTOM_DEFAULT;
|
|
pin->tx_custom_high_usecs = CEC_TIM_CUSTOM_DEFAULT;
|
|
return true;
|
|
}
|
|
if (!strcmp(token, "tx-ignore-nack-until-eom")) {
|
|
pin->tx_ignore_nack_until_eom = true;
|
|
return true;
|
|
}
|
|
if (!strcmp(token, "tx-custom-pulse")) {
|
|
pin->tx_custom_pulse = true;
|
|
cec_pin_start_timer(pin);
|
|
return true;
|
|
}
|
|
if (!p)
|
|
return false;
|
|
|
|
p = skip_spaces(p);
|
|
if (!strcmp(token, "tx-custom-low-usecs")) {
|
|
u32 usecs;
|
|
|
|
if (kstrtou32(p, 0, &usecs) || usecs > 10000000)
|
|
return false;
|
|
pin->tx_custom_low_usecs = usecs;
|
|
return true;
|
|
}
|
|
if (!strcmp(token, "tx-custom-high-usecs")) {
|
|
u32 usecs;
|
|
|
|
if (kstrtou32(p, 0, &usecs) || usecs > 10000000)
|
|
return false;
|
|
pin->tx_custom_high_usecs = usecs;
|
|
return true;
|
|
}
|
|
|
|
comma = strchr(token, ',');
|
|
if (comma)
|
|
*comma++ = '\0';
|
|
if (!strcmp(token, "any"))
|
|
op = CEC_ERROR_INJ_OP_ANY;
|
|
else if (!kstrtou8(token, 0, &v))
|
|
op = v;
|
|
else
|
|
return false;
|
|
mode = CEC_ERROR_INJ_MODE_ONCE;
|
|
if (comma) {
|
|
if (!strcmp(comma, "off"))
|
|
mode = CEC_ERROR_INJ_MODE_OFF;
|
|
else if (!strcmp(comma, "once"))
|
|
mode = CEC_ERROR_INJ_MODE_ONCE;
|
|
else if (!strcmp(comma, "always"))
|
|
mode = CEC_ERROR_INJ_MODE_ALWAYS;
|
|
else if (!strcmp(comma, "toggle"))
|
|
mode = CEC_ERROR_INJ_MODE_TOGGLE;
|
|
else
|
|
return false;
|
|
}
|
|
|
|
error = pin->error_inj + op;
|
|
args = pin->error_inj_args[op];
|
|
has_op = op <= 0xff;
|
|
|
|
token = strsep(&p, delims);
|
|
if (p) {
|
|
p = skip_spaces(p);
|
|
has_pos = !kstrtou8(p, 0, &pos);
|
|
}
|
|
|
|
if (!strcmp(token, "clear")) {
|
|
*error = 0;
|
|
return true;
|
|
}
|
|
if (!strcmp(token, "rx-clear")) {
|
|
*error &= ~CEC_ERROR_INJ_RX_MASK;
|
|
return true;
|
|
}
|
|
if (!strcmp(token, "tx-clear")) {
|
|
*error &= ~CEC_ERROR_INJ_TX_MASK;
|
|
return true;
|
|
}
|
|
|
|
for (i = 0; cec_error_inj_cmds[i].cmd; i++) {
|
|
const char *cmd = cec_error_inj_cmds[i].cmd;
|
|
unsigned int mode_offset;
|
|
u64 mode_mask;
|
|
int arg_idx;
|
|
bool is_bit_pos = true;
|
|
|
|
if (strcmp(token, cmd))
|
|
continue;
|
|
|
|
mode_offset = cec_error_inj_cmds[i].mode_offset;
|
|
mode_mask = CEC_ERROR_INJ_MODE_MASK << mode_offset;
|
|
arg_idx = cec_error_inj_cmds[i].arg_idx;
|
|
|
|
if (mode_offset == CEC_ERROR_INJ_RX_ARB_LOST_OFFSET ||
|
|
mode_offset == CEC_ERROR_INJ_TX_ADD_BYTES_OFFSET)
|
|
is_bit_pos = false;
|
|
|
|
if (mode_offset == CEC_ERROR_INJ_RX_ARB_LOST_OFFSET) {
|
|
if (has_op)
|
|
return false;
|
|
if (!has_pos)
|
|
pos = 0x0f;
|
|
}
|
|
if (arg_idx >= 0 && is_bit_pos) {
|
|
if (!has_pos || pos >= 160)
|
|
return false;
|
|
if (has_op && pos < 10 + 8)
|
|
return false;
|
|
/* Invalid bit position may not be the Ack bit */
|
|
if ((mode_offset == CEC_ERROR_INJ_TX_SHORT_BIT_OFFSET ||
|
|
mode_offset == CEC_ERROR_INJ_TX_LONG_BIT_OFFSET ||
|
|
mode_offset == CEC_ERROR_INJ_TX_CUSTOM_BIT_OFFSET) &&
|
|
(pos % 10) == 9)
|
|
return false;
|
|
}
|
|
*error &= ~mode_mask;
|
|
*error |= (u64)mode << mode_offset;
|
|
if (arg_idx >= 0)
|
|
args[arg_idx] = pos;
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
static void cec_pin_show_cmd(struct seq_file *sf, u32 cmd, u8 mode)
|
|
{
|
|
if (cmd == CEC_ERROR_INJ_OP_ANY)
|
|
seq_puts(sf, "any,");
|
|
else
|
|
seq_printf(sf, "0x%02x,", cmd);
|
|
switch (mode) {
|
|
case CEC_ERROR_INJ_MODE_ONCE:
|
|
seq_puts(sf, "once ");
|
|
break;
|
|
case CEC_ERROR_INJ_MODE_ALWAYS:
|
|
seq_puts(sf, "always ");
|
|
break;
|
|
case CEC_ERROR_INJ_MODE_TOGGLE:
|
|
seq_puts(sf, "toggle ");
|
|
break;
|
|
default:
|
|
seq_puts(sf, "off ");
|
|
break;
|
|
}
|
|
}
|
|
|
|
int cec_pin_error_inj_show(struct cec_adapter *adap, struct seq_file *sf)
|
|
{
|
|
struct cec_pin *pin = adap->pin;
|
|
unsigned int i, j;
|
|
|
|
seq_puts(sf, "# Clear error injections:\n");
|
|
seq_puts(sf, "# clear clear all rx and tx error injections\n");
|
|
seq_puts(sf, "# rx-clear clear all rx error injections\n");
|
|
seq_puts(sf, "# tx-clear clear all tx error injections\n");
|
|
seq_puts(sf, "# <op> clear clear all rx and tx error injections for <op>\n");
|
|
seq_puts(sf, "# <op> rx-clear clear all rx error injections for <op>\n");
|
|
seq_puts(sf, "# <op> tx-clear clear all tx error injections for <op>\n");
|
|
seq_puts(sf, "#\n");
|
|
seq_puts(sf, "# RX error injection:\n");
|
|
seq_puts(sf, "# <op>[,<mode>] rx-nack NACK the message instead of sending an ACK\n");
|
|
seq_puts(sf, "# <op>[,<mode>] rx-low-drive <bit> force a low-drive condition at this bit position\n");
|
|
seq_puts(sf, "# <op>[,<mode>] rx-add-byte add a spurious byte to the received CEC message\n");
|
|
seq_puts(sf, "# <op>[,<mode>] rx-remove-byte remove the last byte from the received CEC message\n");
|
|
seq_puts(sf, "# <op>[,<mode>] rx-arb-lost <poll> generate a POLL message to trigger an arbitration lost\n");
|
|
seq_puts(sf, "#\n");
|
|
seq_puts(sf, "# TX error injection settings:\n");
|
|
seq_puts(sf, "# tx-ignore-nack-until-eom ignore early NACKs until EOM\n");
|
|
seq_puts(sf, "# tx-custom-low-usecs <usecs> define the 'low' time for the custom pulse\n");
|
|
seq_puts(sf, "# tx-custom-high-usecs <usecs> define the 'high' time for the custom pulse\n");
|
|
seq_puts(sf, "# tx-custom-pulse transmit the custom pulse once the bus is idle\n");
|
|
seq_puts(sf, "#\n");
|
|
seq_puts(sf, "# TX error injection:\n");
|
|
seq_puts(sf, "# <op>[,<mode>] tx-no-eom don't set the EOM bit\n");
|
|
seq_puts(sf, "# <op>[,<mode>] tx-early-eom set the EOM bit one byte too soon\n");
|
|
seq_puts(sf, "# <op>[,<mode>] tx-add-bytes <num> append <num> (1-255) spurious bytes to the message\n");
|
|
seq_puts(sf, "# <op>[,<mode>] tx-remove-byte drop the last byte from the message\n");
|
|
seq_puts(sf, "# <op>[,<mode>] tx-short-bit <bit> make this bit shorter than allowed\n");
|
|
seq_puts(sf, "# <op>[,<mode>] tx-long-bit <bit> make this bit longer than allowed\n");
|
|
seq_puts(sf, "# <op>[,<mode>] tx-custom-bit <bit> send the custom pulse instead of this bit\n");
|
|
seq_puts(sf, "# <op>[,<mode>] tx-short-start send a start pulse that's too short\n");
|
|
seq_puts(sf, "# <op>[,<mode>] tx-long-start send a start pulse that's too long\n");
|
|
seq_puts(sf, "# <op>[,<mode>] tx-custom-start send the custom pulse instead of the start pulse\n");
|
|
seq_puts(sf, "# <op>[,<mode>] tx-last-bit <bit> stop sending after this bit\n");
|
|
seq_puts(sf, "# <op>[,<mode>] tx-low-drive <bit> force a low-drive condition at this bit position\n");
|
|
seq_puts(sf, "#\n");
|
|
seq_puts(sf, "# <op> CEC message opcode (0-255) or 'any'\n");
|
|
seq_puts(sf, "# <mode> 'once' (default), 'always', 'toggle' or 'off'\n");
|
|
seq_puts(sf, "# <bit> CEC message bit (0-159)\n");
|
|
seq_puts(sf, "# 10 bits per 'byte': bits 0-7: data, bit 8: EOM, bit 9: ACK\n");
|
|
seq_puts(sf, "# <poll> CEC poll message used to test arbitration lost (0x00-0xff, default 0x0f)\n");
|
|
seq_puts(sf, "# <usecs> microseconds (0-10000000, default 1000)\n");
|
|
|
|
seq_puts(sf, "\nclear\n");
|
|
|
|
for (i = 0; i < ARRAY_SIZE(pin->error_inj); i++) {
|
|
u64 e = pin->error_inj[i];
|
|
|
|
for (j = 0; cec_error_inj_cmds[j].cmd; j++) {
|
|
const char *cmd = cec_error_inj_cmds[j].cmd;
|
|
unsigned int mode;
|
|
unsigned int mode_offset;
|
|
int arg_idx;
|
|
|
|
mode_offset = cec_error_inj_cmds[j].mode_offset;
|
|
arg_idx = cec_error_inj_cmds[j].arg_idx;
|
|
mode = (e >> mode_offset) & CEC_ERROR_INJ_MODE_MASK;
|
|
if (!mode)
|
|
continue;
|
|
cec_pin_show_cmd(sf, i, mode);
|
|
seq_puts(sf, cmd);
|
|
if (arg_idx >= 0)
|
|
seq_printf(sf, " %u",
|
|
pin->error_inj_args[i][arg_idx]);
|
|
seq_puts(sf, "\n");
|
|
}
|
|
}
|
|
|
|
if (pin->tx_ignore_nack_until_eom)
|
|
seq_puts(sf, "tx-ignore-nack-until-eom\n");
|
|
if (pin->tx_custom_pulse)
|
|
seq_puts(sf, "tx-custom-pulse\n");
|
|
if (pin->tx_custom_low_usecs != CEC_TIM_CUSTOM_DEFAULT)
|
|
seq_printf(sf, "tx-custom-low-usecs %u\n",
|
|
pin->tx_custom_low_usecs);
|
|
if (pin->tx_custom_high_usecs != CEC_TIM_CUSTOM_DEFAULT)
|
|
seq_printf(sf, "tx-custom-high-usecs %u\n",
|
|
pin->tx_custom_high_usecs);
|
|
return 0;
|
|
}
|