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mfd: rave-sp: Emulate CMD_GET_STATUS on device that don't support it 

CMD_GET_STATUS is not supported by some devices implementing
RDU2-compatible ICD as well as "legacy" devices. To account for that
fact, add code that obtains the same information (app/bootloader FW
version) using several different commands.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
This commit is contained in:
Andrey Smirnov 2018-07-06 19:41:08 -07:00 committed by Lee Jones
parent 405dfd4899
commit 80d139b863
1 changed files with 63 additions and 33 deletions
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96
drivers/mfd/rave-sp.c
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@ -117,14 +117,44 @@ struct rave_sp_checksum {
void (*subroutine)(const u8 *, size_t, u8 *);
};
struct rave_sp_version {
u8 hardware;
__le16 major;
u8 minor;
u8 letter[2];
} __packed;
struct rave_sp_status {
struct rave_sp_version bootloader_version;
struct rave_sp_version firmware_version;
u16 rdu_eeprom_flag;
u16 dds_eeprom_flag;
u8 pic_flag;
u8 orientation;
u32 etc;
s16 temp[2];
u8 backlight_current[3];
u8 dip_switch;
u8 host_interrupt;
u16 voltage_28;
u8 i2c_device_status;
u8 power_status;
u8 general_status;
u8 deprecated1;
u8 power_led_status;
u8 deprecated2;
u8 periph_power_shutoff;
} __packed;
/**
* struct rave_sp_variant_cmds - Variant specific command routines
*
* @translate: Generic to variant specific command mapping routine
*
* @get_status: Variant specific implementation of CMD_GET_STATUS
*/
struct rave_sp_variant_cmds {
int (*translate)(enum rave_sp_command);
int (*get_status)(struct rave_sp *sp, struct rave_sp_status *);
};
/**
@ -170,35 +200,6 @@ struct rave_sp {
const char *part_number_bootloader;
};
struct rave_sp_version {
u8 hardware;
__le16 major;
u8 minor;
u8 letter[2];
} __packed;
struct rave_sp_status {
struct rave_sp_version bootloader_version;
struct rave_sp_version firmware_version;
u16 rdu_eeprom_flag;
u16 dds_eeprom_flag;
u8 pic_flag;
u8 orientation;
u32 etc;
s16 temp[2];
u8 backlight_current[3];
u8 dip_switch;
u8 host_interrupt;
u16 voltage_28;
u8 i2c_device_status;
u8 power_status;
u8 general_status;
u8 deprecated1;
u8 power_led_status;
u8 deprecated2;
u8 periph_power_shutoff;
} __packed;
static bool rave_sp_id_is_event(u8 code)
{
return (code & 0xF0) == RAVE_SP_EVNT_BASE;
@ -660,18 +661,44 @@ static const char *devm_rave_sp_version(struct device *dev,
version->letter[1]);
}
static int rave_sp_get_status(struct rave_sp *sp)
static int rave_sp_rdu1_get_status(struct rave_sp *sp,
struct rave_sp_status *status)
{
struct device *dev = &sp->serdev->dev;
u8 cmd[] = {
[0] = RAVE_SP_CMD_STATUS,
[1] = 0
};
return rave_sp_exec(sp, cmd, sizeof(cmd), status, sizeof(*status));
}
static int rave_sp_emulated_get_status(struct rave_sp *sp,
struct rave_sp_status *status)
{
u8 cmd[] = {
[0] = RAVE_SP_CMD_GET_FIRMWARE_VERSION,
[1] = 0,
};
int ret;
ret = rave_sp_exec(sp, cmd, sizeof(cmd), &status->firmware_version,
sizeof(status->firmware_version));
if (ret)
return ret;
cmd[0] = RAVE_SP_CMD_GET_BOOTLOADER_VERSION;
return rave_sp_exec(sp, cmd, sizeof(cmd), &status->bootloader_version,
sizeof(status->bootloader_version));
}
static int rave_sp_get_status(struct rave_sp *sp)
{
struct device *dev = &sp->serdev->dev;
struct rave_sp_status status;
const char *version;
int ret;
ret = rave_sp_exec(sp, cmd, sizeof(cmd), &status, sizeof(status));
ret = sp->variant->cmd.get_status(sp, &status);
if (ret)
return ret;
@ -704,6 +731,7 @@ static const struct rave_sp_variant rave_sp_legacy = {
.checksum = &rave_sp_checksum_ccitt,
.cmd = {
.translate = rave_sp_default_cmd_translate,
.get_status = rave_sp_emulated_get_status,
},
};
@ -711,6 +739,7 @@ static const struct rave_sp_variant rave_sp_rdu1 = {
.checksum = &rave_sp_checksum_8b2c,
.cmd = {
.translate = rave_sp_rdu1_cmd_translate,
.get_status = rave_sp_rdu1_get_status,
},
};
@ -718,6 +747,7 @@ static const struct rave_sp_variant rave_sp_rdu2 = {
.checksum = &rave_sp_checksum_ccitt,
.cmd = {
.translate = rave_sp_rdu2_cmd_translate,
.get_status = rave_sp_emulated_get_status,
},
};