| Message ID | 20231003155842.57313-7-alkuor@gmail.com (mailing list archive) |
|---|---|
| State | Accepted |
| Commit | 7e7a3c815d2217011b47b52961ab14cd0f6d8497 |
| Headers | show |
| Series | Add TPS25750 USB type-C PD controller support | expand |
On Tue, Oct 03, 2023 at 11:58:39AM -0400, Abdel Alkuor wrote: > From: Abdel Alkuor <abdelalkuor@geotab.com> > > TPS25750 controller requires a binary to be loaded with a configuration > binary by an EEPROM or a host. > > Appling a patch bundling using a host is implemented based on the flow > diagram pg.62 in TPS25750 host interface manual. > https://www.ti.com/lit/ug/slvuc05a/slvuc05a.pdf > > The flow diagram can be summarized as following: > - Start the patch loading sequence with patch bundle information by > executing PBMs > - Write the whole patch at once > - When writing the patch fails, execute PBMe which instructs the PD controller > to end the patching process > - After writing the patch successfully, execute PBMc which verifies the patch > integrity and applies the patch internally > - Wait for the device to switch into APP mode (normal operation) > > The execuation flow diagram polls the events register and then polls the > corresponding register related to the event as well before advancing to the next > state. Polling the events register is a redundant step, in this implementation > only the corresponding register related to the event is polled. > > Adding tps25750 support, the followings are being taken care of: > - Implement applying patch flow. > - When an EEPROM is present, tps25750 loads the binary configuration from > EEPROM. Hence, all we need to do is wait for the device to switch to APP > mode. > - Dead battery flag is cleared after switching tps25750 to APP mode so the > PD controller becomes fully functional. > - Add port registration as tps25750 doesn't have system configuration register > to get dr/pr of the current applied binary configuration. Get data role from > the device node and power role from PD status register. > - tps25750 event registers structure is different than tps6598x's, > tps25750 has 11 bytes of events which are read at once where > tps6598x has two event registers of 8 bytes each which are read > separately. Likewise MASK event registers. Also, not all events > are supported in both devices. Create a new handler to accommodate > tps25750 interrupt. > - Enable sleep mode so the device enters sleep state when idling. > - When the current mode is PTCH, enable tps25750 by loading a > configuration patch that switches the device into APP mode. > - Add resume and suspend pm for tps25750. > > Signed-off-by: Abdel Alkuor <abdelalkuor@geotab.com> Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com> > --- > Changes in v10: > - Add tps25750 support and enable it by aggregating the following patches from v9: > 0004-USB-typec-tps6598x-Load-TPS25750-patch-bundle.patch > 0005-USB-typec-tps6598x-Check-for-EEPROM-present.patch > 0006-USB-typec-tps6598x-Clear-dead-battery-flag.patch > 0007-USB-typec-tps6598x-Apply-patch-again-after-power-res.patch > 0008-USB-typec-tps6598x-Add-interrupt-support-for-TPS2575.patch > 0010-USB-typec-tps6598x-Add-port-registration-for-tps2575.patch > 0011-USB-typec-tps6598x-Enable-sleep-mode-for-tps25750.patch > Changes in v9: > - No changes > Changes in v8: > - No changes > Changes in v7: > - Add driver name to commit subject > Changes in v6: > - No changes > Changes in v5: > - Incorporating tps25750 into tps6598x driver > > drivers/usb/typec/tipd/core.c | 447 +++++++++++++++++++++++++++++- > drivers/usb/typec/tipd/tps6598x.h | 17 ++ > 2 files changed, 456 insertions(+), 8 deletions(-) > > diff --git a/drivers/usb/typec/tipd/core.c b/drivers/usb/typec/tipd/core.c > index 9c973ffb4c49..892432ad80a3 100644 > --- a/drivers/usb/typec/tipd/core.c > +++ b/drivers/usb/typec/tipd/core.c > @@ -17,6 +17,7 @@ > #include <linux/usb/typec_altmode.h> > #include <linux/usb/role.h> > #include <linux/workqueue.h> > +#include <linux/firmware.h> > > #include "tps6598x.h" > #include "trace.h" > @@ -36,13 +37,33 @@ > #define TPS_REG_STATUS 0x1a > #define TPS_REG_SYSTEM_CONF 0x28 > #define TPS_REG_CTRL_CONF 0x29 > +#define TPS_REG_BOOT_STATUS 0x2D > #define TPS_REG_POWER_STATUS 0x3f > +#define TPS_REG_PD_STATUS 0x40 > #define TPS_REG_RX_IDENTITY_SOP 0x48 > #define TPS_REG_DATA_STATUS 0x5f > +#define TPS_REG_SLEEP_CONF 0x70 > > /* TPS_REG_SYSTEM_CONF bits */ > #define TPS_SYSCONF_PORTINFO(c) ((c) & 7) > > +/* > + * BPMs task timeout, recommended 5 seconds > + * pg.48 TPS2575 Host Interface Technical Reference > + * Manual (Rev. A) > + * https://www.ti.com/lit/ug/slvuc05a/slvuc05a.pdf > + */ > +#define TPS_BUNDLE_TIMEOUT 0x32 > + > +/* BPMs return code */ > +#define TPS_TASK_BPMS_INVALID_BUNDLE_SIZE 0x4 > +#define TPS_TASK_BPMS_INVALID_SLAVE_ADDR 0x5 > +#define TPS_TASK_BPMS_INVALID_TIMEOUT 0x6 > + > +/* PBMc data out */ > +#define TPS_PBMC_RC 0 /* Return code */ > +#define TPS_PBMC_DPCS 2 /* device patch complete status */ > + > enum { > TPS_PORTINFO_SINK, > TPS_PORTINFO_SINK_ACCESSORY, > @@ -89,6 +110,7 @@ struct tipd_data { > int (*register_port)(struct tps6598x *tps, struct fwnode_handle *node); > void (*trace_power_status)(u16 status); > void (*trace_status)(u32 status); > + int (*apply_patch)(struct tps6598x *tps); > }; > > struct tps6598x { > @@ -108,6 +130,7 @@ struct tps6598x { > enum power_supply_usb_type usb_type; > > int wakeup; > + u32 status; /* status reg */ > u16 pwr_status; > struct delayed_work wq_poll; > > @@ -192,6 +215,11 @@ static inline int tps6598x_read64(struct tps6598x *tps, u8 reg, u64 *val) > return tps6598x_block_read(tps, reg, val, sizeof(u64)); > } > > +static inline int tps6598x_write8(struct tps6598x *tps, u8 reg, u8 val) > +{ > + return tps6598x_block_write(tps, reg, &val, sizeof(u8)); > +} > + > static inline int tps6598x_write64(struct tps6598x *tps, u8 reg, u64 val) > { > return tps6598x_block_write(tps, reg, &val, sizeof(u64)); > @@ -540,6 +568,64 @@ static irqreturn_t cd321x_interrupt(int irq, void *data) > return IRQ_NONE; > } > > +static bool tps6598x_has_role_changed(struct tps6598x *tps, u32 status) > +{ > + status ^= tps->status; > + > + return status & (TPS_STATUS_PORTROLE | TPS_STATUS_DATAROLE); > +} > + > +static irqreturn_t tps25750_interrupt(int irq, void *data) > +{ > + struct tps6598x *tps = data; > + u64 event[2] = { }; > + u32 status; > + int ret; > + > + mutex_lock(&tps->lock); > + > + ret = tps6598x_block_read(tps, TPS_REG_INT_EVENT1, event, 11); > + if (ret) { > + dev_err(tps->dev, "%s: failed to read events\n", __func__); > + goto err_unlock; > + } > + > + if (!(event[0] | event[1])) > + goto err_unlock; > + > + if (!tps6598x_read_status(tps, &status)) > + goto err_clear_ints; > + > + if ((event[0] | event[1]) & TPS_REG_INT_POWER_STATUS_UPDATE) > + if (!tps6598x_read_power_status(tps)) > + goto err_clear_ints; > + > + if ((event[0] | event[1]) & TPS_REG_INT_DATA_STATUS_UPDATE) > + if (!tps6598x_read_data_status(tps)) > + goto err_clear_ints; > + > + /* > + * data/port roles could be updated independently after > + * a plug event. Therefore, we need to check > + * for pr/dr status change to set TypeC dr/pr accordingly. > + */ > + if ((event[0] | event[1]) & TPS_REG_INT_PLUG_EVENT || > + tps6598x_has_role_changed(tps, status)) > + tps6598x_handle_plug_event(tps, status); > + > + tps->status = status; > + > +err_clear_ints: > + tps6598x_block_write(tps, TPS_REG_INT_CLEAR1, event, 11); > + > +err_unlock: > + mutex_unlock(&tps->lock); > + > + if (event[0] | event[1]) > + return IRQ_HANDLED; > + return IRQ_NONE; > +} > + > static irqreturn_t tps6598x_interrupt(int irq, void *data) > { > struct tps6598x *tps = data; > @@ -609,13 +695,15 @@ static int tps6598x_check_mode(struct tps6598x *tps) > if (ret) > return ret; > > - switch (match_string(modes, ARRAY_SIZE(modes), mode)) { > + ret = match_string(modes, ARRAY_SIZE(modes), mode); > + > + switch (ret) { > case TPS_MODE_APP: > case TPS_MODE_PTCH: > - return 0; > + return ret; > case TPS_MODE_BOOT: > dev_warn(tps->dev, "dead-battery condition\n"); > - return 0; > + return ret; > case TPS_MODE_BIST: > case TPS_MODE_DISC: > default: > @@ -777,6 +865,312 @@ tps6598x_register_port(struct tps6598x *tps, struct fwnode_handle *fwnode) > return 0; > } > > +static int > +tps25750_write_firmware(struct tps6598x *tps, > + u8 bpms_addr, const u8 *data, size_t len) > +{ > + struct i2c_client *client = to_i2c_client(tps->dev); > + int ret; > + u8 slave_addr; > + int timeout; > + > + slave_addr = client->addr; > + timeout = client->adapter->timeout; > + > + /* > + * binary configuration size is around ~16Kbytes > + * which might take some time to finish writing it > + */ > + client->adapter->timeout = msecs_to_jiffies(5000); > + client->addr = bpms_addr; > + > + ret = regmap_raw_write(tps->regmap, data[0], &data[1], len - 1); > + > + client->addr = slave_addr; > + client->adapter->timeout = timeout; > + > + return ret; > +} > + > +static int > +tps25750_exec_pbms(struct tps6598x *tps, u8 *in_data, size_t in_len) > +{ > + int ret; > + u8 rc; > + > + ret = tps6598x_exec_cmd_tmo(tps, "PBMs", in_len, in_data, > + sizeof(rc), &rc, 4000, 0); > + if (ret) > + return ret; > + > + switch (rc) { > + case TPS_TASK_BPMS_INVALID_BUNDLE_SIZE: > + dev_err(tps->dev, "%s: invalid fw size\n", __func__); > + return -EINVAL; > + case TPS_TASK_BPMS_INVALID_SLAVE_ADDR: > + dev_err(tps->dev, "%s: invalid slave address\n", __func__); > + return -EINVAL; > + case TPS_TASK_BPMS_INVALID_TIMEOUT: > + dev_err(tps->dev, "%s: timed out\n", __func__); > + return -ETIMEDOUT; > + default: > + break; > + } > + > + return 0; > +} > + > +static int tps25750_abort_patch_process(struct tps6598x *tps) > +{ > + int ret; > + > + ret = tps6598x_exec_cmd(tps, "PBMe", 0, NULL, 0, NULL); > + if (ret) > + return ret; > + > + ret = tps6598x_check_mode(tps); > + if (ret != TPS_MODE_PTCH) > + dev_err(tps->dev, "failed to switch to \"PTCH\" mode\n"); > + > + return ret; > +} > + > +static int tps25750_start_patch_burst_mode(struct tps6598x *tps) > +{ > + int ret; > + const struct firmware *fw; > + const char *firmware_name; > + struct { > + u32 fw_size; > + u8 addr; > + u8 timeout; > + } __packed bpms_data; > + u32 addr; > + struct device_node *np = tps->dev->of_node; > + > + ret = device_property_read_string(tps->dev, "firmware-name", > + &firmware_name); > + if (ret) > + return ret; > + > + ret = request_firmware(&fw, firmware_name, tps->dev); > + if (ret) { > + dev_err(tps->dev, "failed to retrieve \"%s\"\n", firmware_name); > + return ret; > + } > + > + if (fw->size == 0) { > + ret = -EINVAL; > + goto release_fw; > + } > + > + ret = of_property_match_string(np, "reg-names", "patch-address"); > + if (ret < 0) { > + dev_err(tps->dev, "failed to get patch-address %d\n", ret); > + return ret; > + } > + > + ret = of_property_read_u32_index(np, "reg", ret, &addr); > + if (ret) > + return ret; > + > + if (addr == 0 || (addr >= 0x20 && addr <= 0x23)) { > + dev_err(tps->dev, "wrong patch address %u\n", addr); > + return -EINVAL; > + } > + > + bpms_data.addr = (u8)addr; > + bpms_data.fw_size = fw->size; > + bpms_data.timeout = TPS_BUNDLE_TIMEOUT; > + > + ret = tps25750_exec_pbms(tps, (u8 *)&bpms_data, sizeof(bpms_data)); > + if (ret) > + goto release_fw; > + > + ret = tps25750_write_firmware(tps, bpms_data.addr, fw->data, fw->size); > + if (ret) { > + dev_err(tps->dev, "Failed to write patch %s of %zu bytes\n", > + firmware_name, fw->size); > + goto release_fw; > + } > + > + /* > + * A delay of 500us is required after the firmware is written > + * based on pg.62 in tps6598x Host Interface Technical > + * Reference Manual > + * https://www.ti.com/lit/ug/slvuc05a/slvuc05a.pdf > + */ > + udelay(500); > + > +release_fw: > + release_firmware(fw); > + > + return ret; > +} > + > +static int tps25750_complete_patch_process(struct tps6598x *tps) > +{ > + int ret; > + u8 out_data[40]; > + u8 dummy[2] = { }; > + > + /* > + * Without writing something to DATA_IN, this command would > + * return an error > + */ > + ret = tps6598x_exec_cmd_tmo(tps, "PBMc", sizeof(dummy), dummy, > + sizeof(out_data), out_data, 2000, 20); > + if (ret) > + return ret; > + > + if (out_data[TPS_PBMC_RC]) { > + dev_err(tps->dev, > + "%s: pbmc failed: %u\n", __func__, > + out_data[TPS_PBMC_RC]); > + return -EIO; > + } > + > + if (out_data[TPS_PBMC_DPCS]) { > + dev_err(tps->dev, > + "%s: failed device patch complete status: %u\n", > + __func__, out_data[TPS_PBMC_DPCS]); > + return -EIO; > + } > + > + return 0; > +} > + > +static int tps25750_apply_patch(struct tps6598x *tps) > +{ > + int ret; > + unsigned long timeout; > + u64 status = 0; > + > + ret = tps6598x_block_read(tps, TPS_REG_BOOT_STATUS, &status, 5); > + if (ret) > + return ret; > + /* > + * Nothing to be done if the configuration > + * is being loaded from EERPOM > + */ > + if (status & TPS_BOOT_STATUS_I2C_EEPROM_PRESENT) > + goto wait_for_app; > + > + ret = tps25750_start_patch_burst_mode(tps); > + if (ret) { > + tps25750_abort_patch_process(tps); > + return ret; > + } > + > + ret = tps25750_complete_patch_process(tps); > + if (ret) > + return ret; > + > +wait_for_app: > + timeout = jiffies + msecs_to_jiffies(1000); > + > + do { > + ret = tps6598x_check_mode(tps); > + if (ret < 0) > + return ret; > + > + if (time_is_before_jiffies(timeout)) > + return -ETIMEDOUT; > + > + } while (ret != TPS_MODE_APP); > + > + /* > + * The dead battery flag may be triggered when the controller > + * port is connected to a device that can source power and > + * attempts to power up both the controller and the board it is on. > + * To restore controller functionality, it is necessary to clear > + * this flag > + */ > + if (status & TPS_BOOT_STATUS_DEAD_BATTERY_FLAG) { > + ret = tps6598x_exec_cmd(tps, "DBfg", 0, NULL, 0, NULL); > + if (ret) { > + dev_err(tps->dev, "failed to clear dead battery %d\n", ret); > + return ret; > + } > + } > + > + dev_info(tps->dev, "controller switched to \"APP\" mode\n"); > + > + return 0; > +}; > + > +static int tps25750_init(struct tps6598x *tps) > +{ > + int ret; > + > + ret = tps->data->apply_patch(tps); > + if (ret) > + return ret; > + > + ret = tps6598x_write8(tps, TPS_REG_SLEEP_CONF, > + TPS_SLEEP_CONF_SLEEP_MODE_ALLOWED); > + if (ret) > + dev_warn(tps->dev, > + "%s: failed to enable sleep mode: %d\n", > + __func__, ret); > + > + return 0; > +} > + > +static int > +tps25750_register_port(struct tps6598x *tps, struct fwnode_handle *fwnode) > +{ > + struct typec_capability typec_cap = { }; > + const char *data_role; > + u8 pd_status; > + int ret; > + > + ret = tps6598x_read8(tps, TPS_REG_PD_STATUS, &pd_status); > + if (ret) > + return ret; > + > + ret = fwnode_property_read_string(fwnode, "data-role", &data_role); > + if (ret) { > + dev_err(tps->dev, "data-role not found: %d\n", ret); > + return ret; > + } > + > + ret = typec_find_port_data_role(data_role); > + if (ret < 0) { > + dev_err(tps->dev, "unknown data-role: %s\n", data_role); > + return ret; > + } > + > + typec_cap.data = ret; > + typec_cap.revision = USB_TYPEC_REV_1_3; > + typec_cap.pd_revision = 0x300; > + typec_cap.driver_data = tps; > + typec_cap.ops = &tps6598x_ops; > + typec_cap.fwnode = fwnode; > + typec_cap.prefer_role = TYPEC_NO_PREFERRED_ROLE; > + > + switch (TPS_PD_STATUS_PORT_TYPE(pd_status)) { > + case TPS_PD_STATUS_PORT_TYPE_SINK_SOURCE: > + case TPS_PD_STATUS_PORT_TYPE_SOURCE_SINK: > + typec_cap.type = TYPEC_PORT_DRP; > + break; > + case TPS_PD_STATUS_PORT_TYPE_SINK: > + typec_cap.type = TYPEC_PORT_SNK; > + break; > + case TPS_PD_STATUS_PORT_TYPE_SOURCE: > + typec_cap.type = TYPEC_PORT_SRC; > + break; > + default: > + return -ENODEV; > + } > + > + tps->port = typec_register_port(tps->dev, &typec_cap); > + if (IS_ERR(tps->port)) > + return PTR_ERR(tps->port); > + > + return 0; > +} > + > static int tps6598x_probe(struct i2c_client *client) > { > struct device_node *np = client->dev.of_node; > @@ -786,6 +1180,7 @@ static int tps6598x_probe(struct i2c_client *client) > u32 vid; > int ret; > u64 mask1; > + bool is_tps25750; > > tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL); > if (!tps) > @@ -798,9 +1193,12 @@ static int tps6598x_probe(struct i2c_client *client) > if (IS_ERR(tps->regmap)) > return PTR_ERR(tps->regmap); > > - ret = tps6598x_read32(tps, TPS_REG_VID, &vid); > - if (ret < 0 || !vid) > - return -ENODEV; > + is_tps25750 = device_is_compatible(tps->dev, "ti,tps25750"); > + if (!is_tps25750) { > + ret = tps6598x_read32(tps, TPS_REG_VID, &vid); > + if (ret < 0 || !vid) > + return -ENODEV; > + } > > /* > * Checking can the adapter handle SMBus protocol. If it can not, the > @@ -833,12 +1231,18 @@ static int tps6598x_probe(struct i2c_client *client) > > /* Make sure the controller has application firmware running */ > ret = tps6598x_check_mode(tps); > - if (ret) > + if (ret < 0) > return ret; > > + if (is_tps25750 && ret == TPS_MODE_PTCH) { > + ret = tps25750_init(tps); > + if (ret) > + return ret; > + } > + > ret = tps6598x_write64(tps, TPS_REG_INT_MASK1, mask1); > if (ret) > - return ret; > + goto err_reset_controller; > > if (!tps6598x_read_status(tps, &status)) { > ret = -ENODEV; > @@ -917,6 +1321,10 @@ static int tps6598x_probe(struct i2c_client *client) > fwnode_handle_put(fwnode); > err_clear_mask: > tps6598x_write64(tps, TPS_REG_INT_MASK1, 0); > +err_reset_controller: > + /* Reset PD controller to remove any applied patch */ > + if (is_tps25750) > + tps6598x_exec_cmd_tmo(tps, "GAID", 0, NULL, 0, NULL, 2000, 0); > return ret; > } > > @@ -927,9 +1335,14 @@ static void tps6598x_remove(struct i2c_client *client) > if (!client->irq) > cancel_delayed_work_sync(&tps->wq_poll); > > + devm_free_irq(tps->dev, client->irq, tps); > tps6598x_disconnect(tps, 0); > typec_unregister_port(tps->port); > usb_role_switch_put(tps->role_sw); > + > + /* Reset PD controller to remove any applied patch */ > + if (device_is_compatible(tps->dev, "ti,tps25750")) > + tps6598x_exec_cmd_tmo(tps, "GAID", 0, NULL, 0, NULL, 2000, 0); > } > > static int __maybe_unused tps6598x_suspend(struct device *dev) > @@ -952,6 +1365,17 @@ static int __maybe_unused tps6598x_resume(struct device *dev) > { > struct i2c_client *client = to_i2c_client(dev); > struct tps6598x *tps = i2c_get_clientdata(client); > + int ret; > + > + ret = tps6598x_check_mode(tps); > + if (ret < 0) > + return ret; > + > + if (device_is_compatible(tps->dev, "ti,tps25750") && ret == TPS_MODE_PTCH) { > + ret = tps25750_init(tps); > + if (ret) > + return ret; > + } > > if (tps->wakeup) { > disable_irq_wake(client->irq); > @@ -983,9 +1407,16 @@ static const struct tipd_data tps6598x_data = { > .trace_status = trace_tps6598x_status, > }; > > +static const struct tipd_data tps25750_data = { > + .irq_handler = tps25750_interrupt, > + .register_port = tps25750_register_port, > + .apply_patch = tps25750_apply_patch, > +}; > + > static const struct of_device_id tps6598x_of_match[] = { > { .compatible = "ti,tps6598x", &tps6598x_data}, > { .compatible = "apple,cd321x", &cd321x_data}, > + { .compatible = "ti,tps25750", &tps25750_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 527857549d69..f86b5e96efba 100644 > --- a/drivers/usb/typec/tipd/tps6598x.h > +++ b/drivers/usb/typec/tipd/tps6598x.h > @@ -199,4 +199,21 @@ > #define TPS_DATA_STATUS_DP_SPEC_PIN_ASSIGNMENT_A BIT(2) > #define TPS_DATA_STATUS_DP_SPEC_PIN_ASSIGNMENT_B (BIT(2) | BIT(1)) > > +/* BOOT STATUS REG*/ > +#define TPS_BOOT_STATUS_DEAD_BATTERY_FLAG BIT(2) > +#define TPS_BOOT_STATUS_I2C_EEPROM_PRESENT BIT(3) > + > +/* PD STATUS REG */ > +#define TPS_REG_PD_STATUS_PORT_TYPE_MASK GENMASK(5, 4) > +#define TPS_PD_STATUS_PORT_TYPE(x) \ > + TPS_FIELD_GET(TPS_REG_PD_STATUS_PORT_TYPE_MASK, x) > + > +#define TPS_PD_STATUS_PORT_TYPE_SINK_SOURCE 0 > +#define TPS_PD_STATUS_PORT_TYPE_SINK 1 > +#define TPS_PD_STATUS_PORT_TYPE_SOURCE 2 > +#define TPS_PD_STATUS_PORT_TYPE_SOURCE_SINK 3 > + > +/* SLEEP CONF REG */ > +#define TPS_SLEEP_CONF_SLEEP_MODE_ALLOWED BIT(0) > + > #endif /* __TPS6598X_H__ */ > -- > 2.34.1
diff --git a/drivers/usb/typec/tipd/core.c b/drivers/usb/typec/tipd/core.c index 9c973ffb4c49..892432ad80a3 100644 --- a/drivers/usb/typec/tipd/core.c +++ b/drivers/usb/typec/tipd/core.c @@ -17,6 +17,7 @@ #include <linux/usb/typec_altmode.h> #include <linux/usb/role.h> #include <linux/workqueue.h> +#include <linux/firmware.h> #include "tps6598x.h" #include "trace.h" @@ -36,13 +37,33 @@ #define TPS_REG_STATUS 0x1a #define TPS_REG_SYSTEM_CONF 0x28 #define TPS_REG_CTRL_CONF 0x29 +#define TPS_REG_BOOT_STATUS 0x2D #define TPS_REG_POWER_STATUS 0x3f +#define TPS_REG_PD_STATUS 0x40 #define TPS_REG_RX_IDENTITY_SOP 0x48 #define TPS_REG_DATA_STATUS 0x5f +#define TPS_REG_SLEEP_CONF 0x70 /* TPS_REG_SYSTEM_CONF bits */ #define TPS_SYSCONF_PORTINFO(c) ((c) & 7) +/* + * BPMs task timeout, recommended 5 seconds + * pg.48 TPS2575 Host Interface Technical Reference + * Manual (Rev. A) + * https://www.ti.com/lit/ug/slvuc05a/slvuc05a.pdf + */ +#define TPS_BUNDLE_TIMEOUT 0x32 + +/* BPMs return code */ +#define TPS_TASK_BPMS_INVALID_BUNDLE_SIZE 0x4 +#define TPS_TASK_BPMS_INVALID_SLAVE_ADDR 0x5 +#define TPS_TASK_BPMS_INVALID_TIMEOUT 0x6 + +/* PBMc data out */ +#define TPS_PBMC_RC 0 /* Return code */ +#define TPS_PBMC_DPCS 2 /* device patch complete status */ + enum { TPS_PORTINFO_SINK, TPS_PORTINFO_SINK_ACCESSORY, @@ -89,6 +110,7 @@ struct tipd_data { int (*register_port)(struct tps6598x *tps, struct fwnode_handle *node); void (*trace_power_status)(u16 status); void (*trace_status)(u32 status); + int (*apply_patch)(struct tps6598x *tps); }; struct tps6598x { @@ -108,6 +130,7 @@ struct tps6598x { enum power_supply_usb_type usb_type; int wakeup; + u32 status; /* status reg */ u16 pwr_status; struct delayed_work wq_poll; @@ -192,6 +215,11 @@ static inline int tps6598x_read64(struct tps6598x *tps, u8 reg, u64 *val) return tps6598x_block_read(tps, reg, val, sizeof(u64)); } +static inline int tps6598x_write8(struct tps6598x *tps, u8 reg, u8 val) +{ + return tps6598x_block_write(tps, reg, &val, sizeof(u8)); +} + static inline int tps6598x_write64(struct tps6598x *tps, u8 reg, u64 val) { return tps6598x_block_write(tps, reg, &val, sizeof(u64)); @@ -540,6 +568,64 @@ static irqreturn_t cd321x_interrupt(int irq, void *data) return IRQ_NONE; } +static bool tps6598x_has_role_changed(struct tps6598x *tps, u32 status) +{ + status ^= tps->status; + + return status & (TPS_STATUS_PORTROLE | TPS_STATUS_DATAROLE); +} + +static irqreturn_t tps25750_interrupt(int irq, void *data) +{ + struct tps6598x *tps = data; + u64 event[2] = { }; + u32 status; + int ret; + + mutex_lock(&tps->lock); + + ret = tps6598x_block_read(tps, TPS_REG_INT_EVENT1, event, 11); + if (ret) { + dev_err(tps->dev, "%s: failed to read events\n", __func__); + goto err_unlock; + } + + if (!(event[0] | event[1])) + goto err_unlock; + + if (!tps6598x_read_status(tps, &status)) + goto err_clear_ints; + + if ((event[0] | event[1]) & TPS_REG_INT_POWER_STATUS_UPDATE) + if (!tps6598x_read_power_status(tps)) + goto err_clear_ints; + + if ((event[0] | event[1]) & TPS_REG_INT_DATA_STATUS_UPDATE) + if (!tps6598x_read_data_status(tps)) + goto err_clear_ints; + + /* + * data/port roles could be updated independently after + * a plug event. Therefore, we need to check + * for pr/dr status change to set TypeC dr/pr accordingly. + */ + if ((event[0] | event[1]) & TPS_REG_INT_PLUG_EVENT || + tps6598x_has_role_changed(tps, status)) + tps6598x_handle_plug_event(tps, status); + + tps->status = status; + +err_clear_ints: + tps6598x_block_write(tps, TPS_REG_INT_CLEAR1, event, 11); + +err_unlock: + mutex_unlock(&tps->lock); + + if (event[0] | event[1]) + return IRQ_HANDLED; + return IRQ_NONE; +} + static irqreturn_t tps6598x_interrupt(int irq, void *data) { struct tps6598x *tps = data; @@ -609,13 +695,15 @@ static int tps6598x_check_mode(struct tps6598x *tps) if (ret) return ret; - switch (match_string(modes, ARRAY_SIZE(modes), mode)) { + ret = match_string(modes, ARRAY_SIZE(modes), mode); + + switch (ret) { case TPS_MODE_APP: case TPS_MODE_PTCH: - return 0; + return ret; case TPS_MODE_BOOT: dev_warn(tps->dev, "dead-battery condition\n"); - return 0; + return ret; case TPS_MODE_BIST: case TPS_MODE_DISC: default: @@ -777,6 +865,312 @@ tps6598x_register_port(struct tps6598x *tps, struct fwnode_handle *fwnode) return 0; } +static int +tps25750_write_firmware(struct tps6598x *tps, + u8 bpms_addr, const u8 *data, size_t len) +{ + struct i2c_client *client = to_i2c_client(tps->dev); + int ret; + u8 slave_addr; + int timeout; + + slave_addr = client->addr; + timeout = client->adapter->timeout; + + /* + * binary configuration size is around ~16Kbytes + * which might take some time to finish writing it + */ + client->adapter->timeout = msecs_to_jiffies(5000); + client->addr = bpms_addr; + + ret = regmap_raw_write(tps->regmap, data[0], &data[1], len - 1); + + client->addr = slave_addr; + client->adapter->timeout = timeout; + + return ret; +} + +static int +tps25750_exec_pbms(struct tps6598x *tps, u8 *in_data, size_t in_len) +{ + int ret; + u8 rc; + + ret = tps6598x_exec_cmd_tmo(tps, "PBMs", in_len, in_data, + sizeof(rc), &rc, 4000, 0); + if (ret) + return ret; + + switch (rc) { + case TPS_TASK_BPMS_INVALID_BUNDLE_SIZE: + dev_err(tps->dev, "%s: invalid fw size\n", __func__); + return -EINVAL; + case TPS_TASK_BPMS_INVALID_SLAVE_ADDR: + dev_err(tps->dev, "%s: invalid slave address\n", __func__); + return -EINVAL; + case TPS_TASK_BPMS_INVALID_TIMEOUT: + dev_err(tps->dev, "%s: timed out\n", __func__); + return -ETIMEDOUT; + default: + break; + } + + return 0; +} + +static int tps25750_abort_patch_process(struct tps6598x *tps) +{ + int ret; + + ret = tps6598x_exec_cmd(tps, "PBMe", 0, NULL, 0, NULL); + if (ret) + return ret; + + ret = tps6598x_check_mode(tps); + if (ret != TPS_MODE_PTCH) + dev_err(tps->dev, "failed to switch to \"PTCH\" mode\n"); + + return ret; +} + +static int tps25750_start_patch_burst_mode(struct tps6598x *tps) +{ + int ret; + const struct firmware *fw; + const char *firmware_name; + struct { + u32 fw_size; + u8 addr; + u8 timeout; + } __packed bpms_data; + u32 addr; + struct device_node *np = tps->dev->of_node; + + ret = device_property_read_string(tps->dev, "firmware-name", + &firmware_name); + if (ret) + return ret; + + ret = request_firmware(&fw, firmware_name, tps->dev); + if (ret) { + dev_err(tps->dev, "failed to retrieve \"%s\"\n", firmware_name); + return ret; + } + + if (fw->size == 0) { + ret = -EINVAL; + goto release_fw; + } + + ret = of_property_match_string(np, "reg-names", "patch-address"); + if (ret < 0) { + dev_err(tps->dev, "failed to get patch-address %d\n", ret); + return ret; + } + + ret = of_property_read_u32_index(np, "reg", ret, &addr); + if (ret) + return ret; + + if (addr == 0 || (addr >= 0x20 && addr <= 0x23)) { + dev_err(tps->dev, "wrong patch address %u\n", addr); + return -EINVAL; + } + + bpms_data.addr = (u8)addr; + bpms_data.fw_size = fw->size; + bpms_data.timeout = TPS_BUNDLE_TIMEOUT; + + ret = tps25750_exec_pbms(tps, (u8 *)&bpms_data, sizeof(bpms_data)); + if (ret) + goto release_fw; + + ret = tps25750_write_firmware(tps, bpms_data.addr, fw->data, fw->size); + if (ret) { + dev_err(tps->dev, "Failed to write patch %s of %zu bytes\n", + firmware_name, fw->size); + goto release_fw; + } + + /* + * A delay of 500us is required after the firmware is written + * based on pg.62 in tps6598x Host Interface Technical + * Reference Manual + * https://www.ti.com/lit/ug/slvuc05a/slvuc05a.pdf + */ + udelay(500); + +release_fw: + release_firmware(fw); + + return ret; +} + +static int tps25750_complete_patch_process(struct tps6598x *tps) +{ + int ret; + u8 out_data[40]; + u8 dummy[2] = { }; + + /* + * Without writing something to DATA_IN, this command would + * return an error + */ + ret = tps6598x_exec_cmd_tmo(tps, "PBMc", sizeof(dummy), dummy, + sizeof(out_data), out_data, 2000, 20); + if (ret) + return ret; + + if (out_data[TPS_PBMC_RC]) { + dev_err(tps->dev, + "%s: pbmc failed: %u\n", __func__, + out_data[TPS_PBMC_RC]); + return -EIO; + } + + if (out_data[TPS_PBMC_DPCS]) { + dev_err(tps->dev, + "%s: failed device patch complete status: %u\n", + __func__, out_data[TPS_PBMC_DPCS]); + return -EIO; + } + + return 0; +} + +static int tps25750_apply_patch(struct tps6598x *tps) +{ + int ret; + unsigned long timeout; + u64 status = 0; + + ret = tps6598x_block_read(tps, TPS_REG_BOOT_STATUS, &status, 5); + if (ret) + return ret; + /* + * Nothing to be done if the configuration + * is being loaded from EERPOM + */ + if (status & TPS_BOOT_STATUS_I2C_EEPROM_PRESENT) + goto wait_for_app; + + ret = tps25750_start_patch_burst_mode(tps); + if (ret) { + tps25750_abort_patch_process(tps); + return ret; + } + + ret = tps25750_complete_patch_process(tps); + if (ret) + return ret; + +wait_for_app: + timeout = jiffies + msecs_to_jiffies(1000); + + do { + ret = tps6598x_check_mode(tps); + if (ret < 0) + return ret; + + if (time_is_before_jiffies(timeout)) + return -ETIMEDOUT; + + } while (ret != TPS_MODE_APP); + + /* + * The dead battery flag may be triggered when the controller + * port is connected to a device that can source power and + * attempts to power up both the controller and the board it is on. + * To restore controller functionality, it is necessary to clear + * this flag + */ + if (status & TPS_BOOT_STATUS_DEAD_BATTERY_FLAG) { + ret = tps6598x_exec_cmd(tps, "DBfg", 0, NULL, 0, NULL); + if (ret) { + dev_err(tps->dev, "failed to clear dead battery %d\n", ret); + return ret; + } + } + + dev_info(tps->dev, "controller switched to \"APP\" mode\n"); + + return 0; +}; + +static int tps25750_init(struct tps6598x *tps) +{ + int ret; + + ret = tps->data->apply_patch(tps); + if (ret) + return ret; + + ret = tps6598x_write8(tps, TPS_REG_SLEEP_CONF, + TPS_SLEEP_CONF_SLEEP_MODE_ALLOWED); + if (ret) + dev_warn(tps->dev, + "%s: failed to enable sleep mode: %d\n", + __func__, ret); + + return 0; +} + +static int +tps25750_register_port(struct tps6598x *tps, struct fwnode_handle *fwnode) +{ + struct typec_capability typec_cap = { }; + const char *data_role; + u8 pd_status; + int ret; + + ret = tps6598x_read8(tps, TPS_REG_PD_STATUS, &pd_status); + if (ret) + return ret; + + ret = fwnode_property_read_string(fwnode, "data-role", &data_role); + if (ret) { + dev_err(tps->dev, "data-role not found: %d\n", ret); + return ret; + } + + ret = typec_find_port_data_role(data_role); + if (ret < 0) { + dev_err(tps->dev, "unknown data-role: %s\n", data_role); + return ret; + } + + typec_cap.data = ret; + typec_cap.revision = USB_TYPEC_REV_1_3; + typec_cap.pd_revision = 0x300; + typec_cap.driver_data = tps; + typec_cap.ops = &tps6598x_ops; + typec_cap.fwnode = fwnode; + typec_cap.prefer_role = TYPEC_NO_PREFERRED_ROLE; + + switch (TPS_PD_STATUS_PORT_TYPE(pd_status)) { + case TPS_PD_STATUS_PORT_TYPE_SINK_SOURCE: + case TPS_PD_STATUS_PORT_TYPE_SOURCE_SINK: + typec_cap.type = TYPEC_PORT_DRP; + break; + case TPS_PD_STATUS_PORT_TYPE_SINK: + typec_cap.type = TYPEC_PORT_SNK; + break; + case TPS_PD_STATUS_PORT_TYPE_SOURCE: + typec_cap.type = TYPEC_PORT_SRC; + break; + default: + return -ENODEV; + } + + tps->port = typec_register_port(tps->dev, &typec_cap); + if (IS_ERR(tps->port)) + return PTR_ERR(tps->port); + + return 0; +} + static int tps6598x_probe(struct i2c_client *client) { struct device_node *np = client->dev.of_node; @@ -786,6 +1180,7 @@ static int tps6598x_probe(struct i2c_client *client) u32 vid; int ret; u64 mask1; + bool is_tps25750; tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL); if (!tps) @@ -798,9 +1193,12 @@ static int tps6598x_probe(struct i2c_client *client) if (IS_ERR(tps->regmap)) return PTR_ERR(tps->regmap); - ret = tps6598x_read32(tps, TPS_REG_VID, &vid); - if (ret < 0 || !vid) - return -ENODEV; + is_tps25750 = device_is_compatible(tps->dev, "ti,tps25750"); + if (!is_tps25750) { + ret = tps6598x_read32(tps, TPS_REG_VID, &vid); + if (ret < 0 || !vid) + return -ENODEV; + } /* * Checking can the adapter handle SMBus protocol. If it can not, the @@ -833,12 +1231,18 @@ static int tps6598x_probe(struct i2c_client *client) /* Make sure the controller has application firmware running */ ret = tps6598x_check_mode(tps); - if (ret) + if (ret < 0) return ret; + if (is_tps25750 && ret == TPS_MODE_PTCH) { + ret = tps25750_init(tps); + if (ret) + return ret; + } + ret = tps6598x_write64(tps, TPS_REG_INT_MASK1, mask1); if (ret) - return ret; + goto err_reset_controller; if (!tps6598x_read_status(tps, &status)) { ret = -ENODEV; @@ -917,6 +1321,10 @@ static int tps6598x_probe(struct i2c_client *client) fwnode_handle_put(fwnode); err_clear_mask: tps6598x_write64(tps, TPS_REG_INT_MASK1, 0); +err_reset_controller: + /* Reset PD controller to remove any applied patch */ + if (is_tps25750) + tps6598x_exec_cmd_tmo(tps, "GAID", 0, NULL, 0, NULL, 2000, 0); return ret; } @@ -927,9 +1335,14 @@ static void tps6598x_remove(struct i2c_client *client) if (!client->irq) cancel_delayed_work_sync(&tps->wq_poll); + devm_free_irq(tps->dev, client->irq, tps); tps6598x_disconnect(tps, 0); typec_unregister_port(tps->port); usb_role_switch_put(tps->role_sw); + + /* Reset PD controller to remove any applied patch */ + if (device_is_compatible(tps->dev, "ti,tps25750")) + tps6598x_exec_cmd_tmo(tps, "GAID", 0, NULL, 0, NULL, 2000, 0); } static int __maybe_unused tps6598x_suspend(struct device *dev) @@ -952,6 +1365,17 @@ static int __maybe_unused tps6598x_resume(struct device *dev) { struct i2c_client *client = to_i2c_client(dev); struct tps6598x *tps = i2c_get_clientdata(client); + int ret; + + ret = tps6598x_check_mode(tps); + if (ret < 0) + return ret; + + if (device_is_compatible(tps->dev, "ti,tps25750") && ret == TPS_MODE_PTCH) { + ret = tps25750_init(tps); + if (ret) + return ret; + } if (tps->wakeup) { disable_irq_wake(client->irq); @@ -983,9 +1407,16 @@ static const struct tipd_data tps6598x_data = { .trace_status = trace_tps6598x_status, }; +static const struct tipd_data tps25750_data = { + .irq_handler = tps25750_interrupt, + .register_port = tps25750_register_port, + .apply_patch = tps25750_apply_patch, +}; + static const struct of_device_id tps6598x_of_match[] = { { .compatible = "ti,tps6598x", &tps6598x_data}, { .compatible = "apple,cd321x", &cd321x_data}, + { .compatible = "ti,tps25750", &tps25750_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 527857549d69..f86b5e96efba 100644 --- a/drivers/usb/typec/tipd/tps6598x.h +++ b/drivers/usb/typec/tipd/tps6598x.h @@ -199,4 +199,21 @@ #define TPS_DATA_STATUS_DP_SPEC_PIN_ASSIGNMENT_A BIT(2) #define TPS_DATA_STATUS_DP_SPEC_PIN_ASSIGNMENT_B (BIT(2) | BIT(1)) +/* BOOT STATUS REG*/ +#define TPS_BOOT_STATUS_DEAD_BATTERY_FLAG BIT(2) +#define TPS_BOOT_STATUS_I2C_EEPROM_PRESENT BIT(3) + +/* PD STATUS REG */ +#define TPS_REG_PD_STATUS_PORT_TYPE_MASK GENMASK(5, 4) +#define TPS_PD_STATUS_PORT_TYPE(x) \ + TPS_FIELD_GET(TPS_REG_PD_STATUS_PORT_TYPE_MASK, x) + +#define TPS_PD_STATUS_PORT_TYPE_SINK_SOURCE 0 +#define TPS_PD_STATUS_PORT_TYPE_SINK 1 +#define TPS_PD_STATUS_PORT_TYPE_SOURCE 2 +#define TPS_PD_STATUS_PORT_TYPE_SOURCE_SINK 3 + +/* SLEEP CONF REG */ +#define TPS_SLEEP_CONF_SLEEP_MODE_ALLOWED BIT(0) + #endif /* __TPS6598X_H__ */