diff options
author | Neil Armstrong <neil.armstrong@linaro.org> | 2023-06-14 15:10:40 +0200 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-06-21 18:07:55 +0200 |
commit | c7054c31c1c94dbfe0ddf7c327f72f020d47c6c9 (patch) | |
tree | dfda55c244fe97baa2cb020cfc3e1593966ea32f /drivers/usb | |
parent | 25a2bc21c86392223142dcbd5bc92e598a950678 (diff) | |
download | linux-c7054c31c1c94dbfe0ddf7c327f72f020d47c6c9.tar.gz linux-c7054c31c1c94dbfe0ddf7c327f72f020d47c6c9.tar.bz2 linux-c7054c31c1c94dbfe0ddf7c327f72f020d47c6c9.zip |
usb: typec: fsa4480: rework mux & switch setup to handle more states
In order to handle the Audio Accessory mode, refactor the mux
and switch setup in a single function.
The refactor will help add new states and make the process
simpler to understand.
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Tested-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20230614-topic-sm8550-upstream-type-c-audio-v1-2-15a92565146b@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb')
-rw-r--r-- | drivers/usb/typec/mux/fsa4480.c | 111 |
1 files changed, 75 insertions, 36 deletions
diff --git a/drivers/usb/typec/mux/fsa4480.c b/drivers/usb/typec/mux/fsa4480.c index b201dda63d77..ab3ff71a6272 100644 --- a/drivers/usb/typec/mux/fsa4480.c +++ b/drivers/usb/typec/mux/fsa4480.c @@ -46,8 +46,11 @@ struct fsa4480 { struct regmap *regmap; + enum typec_orientation orientation; + unsigned long mode; + unsigned int svid; + u8 cur_enable; - u8 cur_select; }; static const struct regmap_config fsa4480_regmap_config = { @@ -58,19 +61,42 @@ static const struct regmap_config fsa4480_regmap_config = { .disable_locking = true, }; -static int fsa4480_switch_set(struct typec_switch_dev *sw, - enum typec_orientation orientation) +static int fsa4480_set(struct fsa4480 *fsa) { - struct fsa4480 *fsa = typec_switch_get_drvdata(sw); - u8 new_sel; - - mutex_lock(&fsa->lock); - new_sel = FSA4480_SEL_USB; - if (orientation == TYPEC_ORIENTATION_REVERSE) - new_sel |= FSA4480_SEL_SBU_REVERSE; - - if (new_sel == fsa->cur_select) - goto out_unlock; + bool reverse = (fsa->orientation == TYPEC_ORIENTATION_REVERSE); + u8 enable = FSA4480_ENABLE_DEVICE; + u8 sel = 0; + + /* USB Mode */ + if (fsa->mode < TYPEC_STATE_MODAL || + (!fsa->svid && (fsa->mode == TYPEC_MODE_USB2 || + fsa->mode == TYPEC_MODE_USB3))) { + enable |= FSA4480_ENABLE_USB; + sel = FSA4480_SEL_USB; + } else if (fsa->svid) { + switch (fsa->mode) { + /* DP Only */ + case TYPEC_DP_STATE_C: + case TYPEC_DP_STATE_E: + enable |= FSA4480_ENABLE_SBU; + if (reverse) + sel = FSA4480_SEL_SBU_REVERSE; + break; + + /* DP + USB */ + case TYPEC_DP_STATE_D: + case TYPEC_DP_STATE_F: + enable |= FSA4480_ENABLE_USB | FSA4480_ENABLE_SBU; + sel = FSA4480_SEL_USB; + if (reverse) + sel |= FSA4480_SEL_SBU_REVERSE; + break; + + default: + return -EOPNOTSUPP; + } + } else + return -EOPNOTSUPP; if (fsa->cur_enable & FSA4480_ENABLE_SBU) { /* Disable SBU output while re-configuring the switch */ @@ -81,48 +107,59 @@ static int fsa4480_switch_set(struct typec_switch_dev *sw, usleep_range(35, 1000); } - regmap_write(fsa->regmap, FSA4480_SWITCH_SELECT, new_sel); - fsa->cur_select = new_sel; - - if (fsa->cur_enable & FSA4480_ENABLE_SBU) { - regmap_write(fsa->regmap, FSA4480_SWITCH_ENABLE, fsa->cur_enable); + regmap_write(fsa->regmap, FSA4480_SWITCH_SELECT, sel); + regmap_write(fsa->regmap, FSA4480_SWITCH_ENABLE, enable); + if (enable & FSA4480_ENABLE_SBU) { /* 15us to allow the SBU switch to turn on again */ usleep_range(15, 1000); } -out_unlock: - mutex_unlock(&fsa->lock); + fsa->cur_enable = enable; return 0; } +static int fsa4480_switch_set(struct typec_switch_dev *sw, + enum typec_orientation orientation) +{ + struct fsa4480 *fsa = typec_switch_get_drvdata(sw); + int ret = 0; + + mutex_lock(&fsa->lock); + + if (fsa->orientation != orientation) { + fsa->orientation = orientation; + + ret = fsa4480_set(fsa); + } + + mutex_unlock(&fsa->lock); + + return ret; +} + static int fsa4480_mux_set(struct typec_mux_dev *mux, struct typec_mux_state *state) { struct fsa4480 *fsa = typec_mux_get_drvdata(mux); - u8 new_enable; + int ret = 0; mutex_lock(&fsa->lock); - new_enable = FSA4480_ENABLE_DEVICE | FSA4480_ENABLE_USB; - if (state->mode >= TYPEC_DP_STATE_A) - new_enable |= FSA4480_ENABLE_SBU; + if (fsa->mode != state->mode) { + fsa->mode = state->mode; - if (new_enable == fsa->cur_enable) - goto out_unlock; + if (state->alt) + fsa->svid = state->alt->svid; + else + fsa->svid = 0; // No SVID - regmap_write(fsa->regmap, FSA4480_SWITCH_ENABLE, new_enable); - fsa->cur_enable = new_enable; - - if (new_enable & FSA4480_ENABLE_SBU) { - /* 15us to allow the SBU switch to turn off */ - usleep_range(15, 1000); + ret = fsa4480_set(fsa); } -out_unlock: mutex_unlock(&fsa->lock); - return 0; + return ret; } static int fsa4480_probe(struct i2c_client *client) @@ -143,8 +180,10 @@ static int fsa4480_probe(struct i2c_client *client) if (IS_ERR(fsa->regmap)) return dev_err_probe(dev, PTR_ERR(fsa->regmap), "failed to initialize regmap\n"); + /* Safe mode */ fsa->cur_enable = FSA4480_ENABLE_DEVICE | FSA4480_ENABLE_USB; - fsa->cur_select = FSA4480_SEL_USB; + fsa->mode = TYPEC_STATE_SAFE; + fsa->orientation = TYPEC_ORIENTATION_NONE; /* set default settings */ regmap_write(fsa->regmap, FSA4480_SLOW_L, 0x00); @@ -156,7 +195,7 @@ static int fsa4480_probe(struct i2c_client *client) regmap_write(fsa->regmap, FSA4480_DELAY_L_MIC, 0x00); regmap_write(fsa->regmap, FSA4480_DELAY_L_SENSE, 0x00); regmap_write(fsa->regmap, FSA4480_DELAY_L_AGND, 0x09); - regmap_write(fsa->regmap, FSA4480_SWITCH_SELECT, fsa->cur_select); + regmap_write(fsa->regmap, FSA4480_SWITCH_SELECT, FSA4480_SEL_USB); regmap_write(fsa->regmap, FSA4480_SWITCH_ENABLE, fsa->cur_enable); sw_desc.drvdata = fsa; |