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Input: cypress_ps2 - use u8 when dealing with byte data

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When dealing with byte data use u8 instead of unsigned char or int.
Stop layering error handling in cypress_ps2_sendbyte() and simply
pass on error code from ps2_sendbyte().

Additionally use u8 instead of unisgned char throughout the code.

Link: https://lore.kernel.org/r/20240628224728.2180126-5-dmitry.torokhov@gmail.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Dmitry Torokhov 2024-06-28 15:47:27 -07:00
parent 93f25f92fc
commit 5e13bea78d
1 changed files with 33 additions and 43 deletions
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76
drivers/input/mouse/cypress_ps2.c
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@ -32,32 +32,30 @@ static void cypress_set_packet_size(struct psmouse *psmouse, unsigned int n)
cytp->pkt_size = n;
}
static const unsigned char cytp_rate[] = {10, 20, 40, 60, 100, 200};
static const unsigned char cytp_resolution[] = {0x00, 0x01, 0x02, 0x03};
static const u8 cytp_rate[] = {10, 20, 40, 60, 100, 200};
static const u8 cytp_resolution[] = {0x00, 0x01, 0x02, 0x03};
static int cypress_ps2_sendbyte(struct psmouse *psmouse, int value)
static int cypress_ps2_sendbyte(struct psmouse *psmouse, u8 cmd)
{
struct ps2dev *ps2dev = &psmouse->ps2dev;
int error;
error = ps2_sendbyte(ps2dev, value & 0xff, CYTP_CMD_TIMEOUT);
error = ps2_sendbyte(ps2dev, cmd, CYTP_CMD_TIMEOUT);
if (error) {
psmouse_dbg(psmouse,
"sending command 0x%02x failed, resp 0x%02x, error %d\n",
value & 0xff, ps2dev->nak, error);
cmd, ps2dev->nak, error);
return error;
}
#ifdef CYTP_DEBUG_VERBOSE
psmouse_dbg(psmouse, "sending command 0x%02x succeeded, resp 0xfa\n",
value & 0xff);
psmouse_dbg(psmouse, "sending command 0x%02x succeeded\n", cmd);
#endif
return 0;
}
static int cypress_ps2_ext_cmd(struct psmouse *psmouse, unsigned short cmd,
unsigned char data)
static int cypress_ps2_ext_cmd(struct psmouse *psmouse, u8 prefix, u8 nibble)
{
struct ps2dev *ps2dev = &psmouse->ps2dev;
int tries = CYTP_PS2_CMD_TRIES;
@ -71,7 +69,7 @@ static int cypress_ps2_ext_cmd(struct psmouse *psmouse, unsigned short cmd,
* If sending the command fails, send recovery command
* to make the device return to the ready state.
*/
rc = cypress_ps2_sendbyte(psmouse, cmd & 0xff);
rc = cypress_ps2_sendbyte(psmouse, prefix);
if (rc == -EAGAIN) {
rc = cypress_ps2_sendbyte(psmouse, 0x00);
if (rc == -EAGAIN)
@ -79,9 +77,9 @@ static int cypress_ps2_ext_cmd(struct psmouse *psmouse, unsigned short cmd,
}
if (!rc) {
rc = cypress_ps2_sendbyte(psmouse, data);
rc = cypress_ps2_sendbyte(psmouse, nibble);
if (rc == -EAGAIN)
rc = cypress_ps2_sendbyte(psmouse, data);
rc = cypress_ps2_sendbyte(psmouse, nibble);
if (!rc)
break;
@ -94,8 +92,7 @@ static int cypress_ps2_ext_cmd(struct psmouse *psmouse, unsigned short cmd,
}
static int cypress_ps2_read_cmd_status(struct psmouse *psmouse,
unsigned char cmd,
unsigned char *param)
u8 cmd, u8 *param)
{
struct ps2dev *ps2dev = &psmouse->ps2dev;
enum psmouse_state old_state;
@ -111,7 +108,7 @@ static int cypress_ps2_read_cmd_status(struct psmouse *psmouse,
pktsize = (cmd == CYTP_CMD_READ_TP_METRICS) ? 8 : 3;
memset(param, 0, pktsize);
rc = cypress_ps2_sendbyte(psmouse, 0xe9);
rc = cypress_ps2_sendbyte(psmouse, PSMOUSE_CMD_GETINFO & 0xff);
if (rc)
goto out;
@ -136,8 +133,7 @@ out:
return rc;
}
static bool cypress_verify_cmd_state(struct psmouse *psmouse,
unsigned char cmd, unsigned char *param)
static bool cypress_verify_cmd_state(struct psmouse *psmouse, u8 cmd, u8* param)
{
bool rate_match = false;
bool resolution_match = false;
@ -167,31 +163,24 @@ static bool cypress_verify_cmd_state(struct psmouse *psmouse,
return false;
}
static int cypress_send_ext_cmd(struct psmouse *psmouse, unsigned char cmd,
unsigned char *param)
static int cypress_send_ext_cmd(struct psmouse *psmouse, u8 cmd, u8 *param)
{
u8 cmd_prefix = PSMOUSE_CMD_SETRES & 0xff;
int tries = CYTP_PS2_CMD_TRIES;
int rc;
int error;
psmouse_dbg(psmouse, "send extension cmd 0x%02x, [%d %d %d %d]\n",
cmd, DECODE_CMD_AA(cmd), DECODE_CMD_BB(cmd),
DECODE_CMD_CC(cmd), DECODE_CMD_DD(cmd));
do {
cypress_ps2_ext_cmd(psmouse,
PSMOUSE_CMD_SETRES, DECODE_CMD_DD(cmd));
cypress_ps2_ext_cmd(psmouse,
PSMOUSE_CMD_SETRES, DECODE_CMD_CC(cmd));
cypress_ps2_ext_cmd(psmouse,
PSMOUSE_CMD_SETRES, DECODE_CMD_BB(cmd));
cypress_ps2_ext_cmd(psmouse,
PSMOUSE_CMD_SETRES, DECODE_CMD_AA(cmd));
cypress_ps2_ext_cmd(psmouse, cmd_prefix, DECODE_CMD_DD(cmd));
cypress_ps2_ext_cmd(psmouse, cmd_prefix, DECODE_CMD_CC(cmd));
cypress_ps2_ext_cmd(psmouse, cmd_prefix, DECODE_CMD_BB(cmd));
cypress_ps2_ext_cmd(psmouse, cmd_prefix, DECODE_CMD_AA(cmd));
rc = cypress_ps2_read_cmd_status(psmouse, cmd, param);
if (rc)
continue;
if (cypress_verify_cmd_state(psmouse, cmd, param))
error = cypress_ps2_read_cmd_status(psmouse, cmd, param);
if (!error && cypress_verify_cmd_state(psmouse, cmd, param))
return 0;
} while (--tries > 0);
@ -201,7 +190,7 @@ static int cypress_send_ext_cmd(struct psmouse *psmouse, unsigned char cmd,
int cypress_detect(struct psmouse *psmouse, bool set_properties)
{
unsigned char param[3];
u8 param[3];
if (cypress_send_ext_cmd(psmouse, CYTP_CMD_READ_CYPRESS_ID, param))
return -ENODEV;
@ -221,7 +210,7 @@ int cypress_detect(struct psmouse *psmouse, bool set_properties)
static int cypress_read_fw_version(struct psmouse *psmouse)
{
struct cytp_data *cytp = psmouse->private;
unsigned char param[3];
u8 param[3];
if (cypress_send_ext_cmd(psmouse, CYTP_CMD_READ_CYPRESS_ID, param))
return -ENODEV;
@ -250,7 +239,7 @@ static int cypress_read_fw_version(struct psmouse *psmouse)
static int cypress_read_tp_metrics(struct psmouse *psmouse)
{
struct cytp_data *cytp = psmouse->private;
unsigned char param[8];
u8 param[8];
/* set default values for tp metrics. */
cytp->tp_width = CYTP_DEFAULT_WIDTH;
@ -338,7 +327,7 @@ static int cypress_query_hardware(struct psmouse *psmouse)
static int cypress_set_absolute_mode(struct psmouse *psmouse)
{
struct cytp_data *cytp = psmouse->private;
unsigned char param[3];
u8 param[3];
int error;
error = cypress_send_ext_cmd(psmouse, CYTP_CMD_ABS_WITH_PRESSURE_MODE,
@ -418,9 +407,9 @@ static int cypress_set_input_params(struct input_dev *input,
return 0;
}
static int cypress_get_finger_count(unsigned char header_byte)
static int cypress_get_finger_count(u8 header_byte)
{
unsigned char bits6_7;
u8 bits6_7;
int finger_count;
bits6_7 = header_byte >> 6;
@ -445,10 +434,11 @@ static int cypress_get_finger_count(unsigned char header_byte)
static int cypress_parse_packet(struct psmouse *psmouse,
struct cytp_data *cytp, struct cytp_report_data *report_data)
struct cytp_data *cytp,
struct cytp_report_data *report_data)
{
unsigned char *packet = psmouse->packet;
unsigned char header_byte = packet[0];
u8 *packet = psmouse->packet;
u8 header_byte = packet[0];
memset(report_data, 0, sizeof(struct cytp_report_data));
@ -563,7 +553,7 @@ static psmouse_ret_t cypress_validate_byte(struct psmouse *psmouse)
{
int contact_cnt;
int index = psmouse->pktcnt - 1;
unsigned char *packet = psmouse->packet;
u8 *packet = psmouse->packet;
struct cytp_data *cytp = psmouse->private;
if (index < 0 || index > cytp->pkt_size)