[PATCH v2 4/6] usb: typec: tipd: Add support for Apple CD321X
From: Sven Peter
Date: Thu Sep 23 2021 - 14:15:03 EST
Apple CD321x chips are a variant of the TI TPS 6598x chips.
The major differences are the changed interrupt numbers and
the concurrent connection to the SMC which we must not disturb.
Signed-off-by: Sven Peter <sven@xxxxxxxxxxxxx>
---
changes since v1:
- new commit since Heikki suggested to just add a separate irq handler
drivers/usb/typec/tipd/core.c | 86 ++++++++++++++++++++++++++++++-
drivers/usb/typec/tipd/tps6598x.h | 6 +++
drivers/usb/typec/tipd/trace.h | 23 +++++++++
3 files changed, 113 insertions(+), 2 deletions(-)
diff --git a/drivers/usb/typec/tipd/core.c b/drivers/usb/typec/tipd/core.c
index cd1e37eb8a0c..6c9c8f19a1cf 100644
--- a/drivers/usb/typec/tipd/core.c
+++ b/drivers/usb/typec/tipd/core.c
@@ -9,6 +9,7 @@
#include <linux/i2c.h>
#include <linux/acpi.h>
#include <linux/module.h>
+#include <linux/of_device.h>
#include <linux/power_supply.h>
#include <linux/regmap.h>
#include <linux/interrupt.h>
@@ -76,6 +77,16 @@ static const char *const modes[] = {
/* Unrecognized commands will be replaced with "!CMD" */
#define INVALID_CMD(_cmd_) (_cmd_ == 0x444d4321)
+enum tipd_hw_type {
+ HW_TPS6598X,
+ HW_CD321X
+};
+
+struct tipd_hw {
+ enum tipd_hw_type type;
+ irq_handler_t irq_handler;
+};
+
struct tps6598x {
struct device *dev;
struct regmap *regmap;
@@ -458,6 +469,51 @@ static void tps6598x_handle_plug_event(struct tps6598x *tps, u32 status)
}
}
+static irqreturn_t cd321x_interrupt(int irq, void *data)
+{
+ struct tps6598x *tps = data;
+ u64 event = 0;
+ u32 status;
+ int ret;
+
+ mutex_lock(&tps->lock);
+
+ ret = tps6598x_read64(tps, TPS_REG_INT_EVENT1, &event);
+ if (ret) {
+ dev_err(tps->dev, "%s: failed to read events\n", __func__);
+ goto err_unlock;
+ }
+ trace_cd321x_irq(event);
+
+ if (!event)
+ goto err_unlock;
+
+ if (!tps6598x_read_status(tps, &status))
+ goto err_clear_ints;
+
+ if (event & APPLE_CD_REG_INT_POWER_STATUS_UPDATE)
+ if (!tps6598x_read_power_status(tps))
+ goto err_clear_ints;
+
+ if (event & APPLE_CD_REG_INT_DATA_STATUS_UPDATE)
+ if (!tps6598x_read_data_status(tps))
+ goto err_clear_ints;
+
+ /* Handle plug insert or removal */
+ if (event & APPLE_CD_REG_INT_PLUG_EVENT)
+ tps6598x_handle_plug_event(tps, status);
+
+err_clear_ints:
+ tps6598x_write64(tps, TPS_REG_INT_CLEAR1, event);
+
+err_unlock:
+ mutex_unlock(&tps->lock);
+
+ if (event)
+ return IRQ_HANDLED;
+ return IRQ_NONE;
+}
+
static irqreturn_t tps6598x_interrupt(int irq, void *data)
{
struct tps6598x *tps = data;
@@ -615,8 +671,19 @@ static int devm_tps6598_psy_register(struct tps6598x *tps)
return PTR_ERR_OR_ZERO(tps->psy);
}
+static const struct tipd_hw ti_tps6598x_data = {
+ .type = HW_TPS6598X,
+ .irq_handler = tps6598x_interrupt,
+};
+
+static const struct tipd_hw apple_cd321x_data = {
+ .type = HW_CD321X,
+ .irq_handler = cd321x_interrupt,
+};
+
static int tps6598x_probe(struct i2c_client *client)
{
+ const struct tipd_hw *hw;
struct typec_capability typec_cap = { };
struct tps6598x *tps;
struct fwnode_handle *fwnode;
@@ -629,6 +696,10 @@ static int tps6598x_probe(struct i2c_client *client)
if (!tps)
return -ENOMEM;
+ hw = of_device_get_match_data(&client->dev);
+ if (!hw)
+ hw = &ti_tps6598x_data;
+
mutex_init(&tps->lock);
tps->dev = &client->dev;
@@ -655,6 +726,16 @@ static int tps6598x_probe(struct i2c_client *client)
if (ret)
return ret;
+ if (hw->type == HW_CD321X) {
+ /* CD321X chips have all interrupts masked initially */
+ ret = tps6598x_write64(tps, TPS_REG_INT_MASK1,
+ APPLE_CD_REG_INT_POWER_STATUS_UPDATE |
+ APPLE_CD_REG_INT_DATA_STATUS_UPDATE |
+ APPLE_CD_REG_INT_PLUG_EVENT);
+ if (ret)
+ return ret;
+ }
+
ret = tps6598x_read32(tps, TPS_REG_STATUS, &status);
if (ret < 0)
return ret;
@@ -736,7 +817,7 @@ static int tps6598x_probe(struct i2c_client *client)
}
ret = devm_request_threaded_irq(&client->dev, client->irq, NULL,
- tps6598x_interrupt,
+ hw->irq_handler,
IRQF_SHARED | IRQF_ONESHOT,
dev_name(&client->dev), tps);
if (ret) {
@@ -769,7 +850,8 @@ static int tps6598x_remove(struct i2c_client *client)
}
static const struct of_device_id tps6598x_of_match[] = {
- { .compatible = "ti,tps6598x", },
+ { .compatible = "ti,tps6598x", .data = &ti_tps6598x_data },
+ { .compatible = "apple,cd321x", .data = &apple_cd321x_data },
{}
};
MODULE_DEVICE_TABLE(of, tps6598x_of_match);
diff --git a/drivers/usb/typec/tipd/tps6598x.h b/drivers/usb/typec/tipd/tps6598x.h
index 003a577be216..e13b16419843 100644
--- a/drivers/usb/typec/tipd/tps6598x.h
+++ b/drivers/usb/typec/tipd/tps6598x.h
@@ -129,6 +129,12 @@
#define TPS_REG_INT_HARD_RESET BIT(1)
#define TPS_REG_INT_PD_SOFT_RESET BIT(0)
+/* Apple-specific TPS_REG_INT_* bits */
+#define APPLE_CD_REG_INT_DATA_STATUS_UPDATE BIT(10)
+#define APPLE_CD_REG_INT_POWER_STATUS_UPDATE BIT(9)
+#define APPLE_CD_REG_INT_STATUS_UPDATE BIT(8)
+#define APPLE_CD_REG_INT_PLUG_EVENT BIT(1)
+
/* TPS_REG_POWER_STATUS bits */
#define TPS_POWER_STATUS_CONNECTION(x) TPS_FIELD_GET(BIT(0), (x))
#define TPS_POWER_STATUS_SOURCESINK(x) TPS_FIELD_GET(BIT(1), (x))
diff --git a/drivers/usb/typec/tipd/trace.h b/drivers/usb/typec/tipd/trace.h
index 5d09d6f78930..12cad1bde7cc 100644
--- a/drivers/usb/typec/tipd/trace.h
+++ b/drivers/usb/typec/tipd/trace.h
@@ -67,6 +67,13 @@
{ TPS_REG_INT_USER_VID_ALT_MODE_ATTN_VDM, "USER_VID_ALT_MODE_ATTN_VDM" }, \
{ TPS_REG_INT_USER_VID_ALT_MODE_OTHER_VDM, "USER_VID_ALT_MODE_OTHER_VDM" })
+#define show_cd321x_irq_flags(flags) \
+ __print_flags_u64(flags, "|", \
+ { APPLE_CD_REG_INT_PLUG_EVENT, "PLUG_EVENT" }, \
+ { APPLE_CD_REG_INT_POWER_STATUS_UPDATE, "POWER_STATUS_UPDATE" }, \
+ { APPLE_CD_REG_INT_DATA_STATUS_UPDATE, "DATA_STATUS_UPDATE" }, \
+ { APPLE_CD_REG_INT_STATUS_UPDATE, "STATUS_UPDATE" })
+
#define TPS6598X_STATUS_FLAGS_MASK (GENMASK(31, 0) ^ (TPS_STATUS_CONN_STATE_MASK | \
TPS_STATUS_PP_5V0_SWITCH_MASK | \
TPS_STATUS_PP_HV_SWITCH_MASK | \
@@ -207,6 +214,22 @@ TRACE_EVENT(tps6598x_irq,
show_irq_flags(__entry->event2))
);
+TRACE_EVENT(cd321x_irq,
+ TP_PROTO(u64 event),
+ TP_ARGS(event),
+
+ TP_STRUCT__entry(
+ __field(u64, event)
+ ),
+
+ TP_fast_assign(
+ __entry->event = event;
+ ),
+
+ TP_printk("event=%s",
+ show_cd321x_irq_flags(__entry->event))
+);
+
TRACE_EVENT(tps6598x_status,
TP_PROTO(u32 status),
TP_ARGS(status),
--
2.25.1