diff options
Diffstat (limited to 'drivers/usb/typec/tipd/core.c')
-rw-r--r-- | drivers/usb/typec/tipd/core.c | 177 |
1 files changed, 155 insertions, 22 deletions
diff --git a/drivers/usb/typec/tipd/core.c b/drivers/usb/typec/tipd/core.c index 196535ad99..0717cfcd9f 100644 --- a/drivers/usb/typec/tipd/core.c +++ b/drivers/usb/typec/tipd/core.c @@ -8,6 +8,7 @@ #include <linux/i2c.h> #include <linux/acpi.h> +#include <linux/gpio/consumer.h> #include <linux/module.h> #include <linux/of.h> #include <linux/power_supply.h> @@ -64,6 +65,9 @@ #define TPS_PBMC_RC 0 /* Return code */ #define TPS_PBMC_DPCS 2 /* device patch complete status */ +/* reset de-assertion to ready for operation */ +#define TPS_SETUP_MS 1000 + enum { TPS_PORTINFO_SINK, TPS_PORTINFO_SINK_ACCESSORY, @@ -111,6 +115,8 @@ struct tipd_data { void (*trace_power_status)(u16 status); void (*trace_status)(u32 status); int (*apply_patch)(struct tps6598x *tps); + int (*init)(struct tps6598x *tps); + int (*reset)(struct tps6598x *tps); }; struct tps6598x { @@ -119,6 +125,7 @@ struct tps6598x { struct mutex lock; /* device lock */ u8 i2c_protocol:1; + struct gpio_desc *reset; struct typec_port *port; struct typec_partner *partner; struct usb_pd_identity partner_identity; @@ -323,7 +330,7 @@ static void tps6598x_disconnect(struct tps6598x *tps, u32 status) } static int tps6598x_exec_cmd_tmo(struct tps6598x *tps, const char *cmd, - size_t in_len, u8 *in_data, + size_t in_len, const u8 *in_data, size_t out_len, u8 *out_data, u32 cmd_timeout_ms, u32 res_delay_ms) { @@ -389,7 +396,7 @@ static int tps6598x_exec_cmd_tmo(struct tps6598x *tps, const char *cmd, } static int tps6598x_exec_cmd(struct tps6598x *tps, const char *cmd, - size_t in_len, u8 *in_data, + size_t in_len, const u8 *in_data, size_t out_len, u8 *out_data) { return tps6598x_exec_cmd_tmo(tps, cmd, in_len, in_data, @@ -866,6 +873,30 @@ tps6598x_register_port(struct tps6598x *tps, struct fwnode_handle *fwnode) return 0; } +static int tps_request_firmware(struct tps6598x *tps, const struct firmware **fw) +{ + const char *firmware_name; + int ret; + + 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) { + release_firmware(*fw); + ret = -EINVAL; + } + + return ret; +} + static int tps25750_write_firmware(struct tps6598x *tps, u8 bpms_addr, const u8 *data, size_t len) @@ -954,16 +985,9 @@ static int tps25750_start_patch_burst_mode(struct tps6598x *tps) 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); + ret = tps_request_firmware(tps, &fw); + if (ret) return ret; - } - - if (fw->size == 0) { - ret = -EINVAL; - goto release_fw; - } ret = of_property_match_string(np, "reg-names", "patch-address"); if (ret < 0) { @@ -1101,6 +1125,76 @@ wait_for_app: return 0; }; +static int tps6598x_apply_patch(struct tps6598x *tps) +{ + u8 in = TPS_PTCS_CONTENT_DEV | TPS_PTCS_CONTENT_APP; + u8 out[TPS_MAX_LEN] = {0}; + size_t in_len = sizeof(in); + size_t copied_bytes = 0; + size_t bytes_left; + const struct firmware *fw; + const char *firmware_name; + int ret; + + ret = device_property_read_string(tps->dev, "firmware-name", + &firmware_name); + if (ret) + return ret; + + ret = tps_request_firmware(tps, &fw); + if (ret) + return ret; + + ret = tps6598x_exec_cmd(tps, "PTCs", in_len, &in, + TPS_PTCS_OUT_BYTES, out); + if (ret || out[TPS_PTCS_STATUS] == TPS_PTCS_STATUS_FAIL) { + if (!ret) + ret = -EBUSY; + dev_err(tps->dev, "Update start failed (%d)\n", ret); + goto release_fw; + } + + bytes_left = fw->size; + while (bytes_left) { + if (bytes_left < TPS_MAX_LEN) + in_len = bytes_left; + else + in_len = TPS_MAX_LEN; + ret = tps6598x_exec_cmd(tps, "PTCd", in_len, + fw->data + copied_bytes, + TPS_PTCD_OUT_BYTES, out); + if (ret || out[TPS_PTCD_TRANSFER_STATUS] || + out[TPS_PTCD_LOADING_STATE] == TPS_PTCD_LOAD_ERR) { + if (!ret) + ret = -EBUSY; + dev_err(tps->dev, "Patch download failed (%d)\n", ret); + goto release_fw; + } + copied_bytes += in_len; + bytes_left -= in_len; + } + + ret = tps6598x_exec_cmd(tps, "PTCc", 0, NULL, TPS_PTCC_OUT_BYTES, out); + if (ret || out[TPS_PTCC_DEV] || out[TPS_PTCC_APP]) { + if (!ret) + ret = -EBUSY; + dev_err(tps->dev, "Update completion failed (%d)\n", ret); + goto release_fw; + } + msleep(TPS_SETUP_MS); + dev_info(tps->dev, "Firmware update succeeded\n"); + +release_fw: + release_firmware(fw); + + return ret; +}; + +static int cd321x_init(struct tps6598x *tps) +{ + return 0; +} + static int tps25750_init(struct tps6598x *tps) { int ret; @@ -1119,6 +1213,26 @@ static int tps25750_init(struct tps6598x *tps) return 0; } +static int tps6598x_init(struct tps6598x *tps) +{ + return tps->data->apply_patch(tps); +} + +static int cd321x_reset(struct tps6598x *tps) +{ + return 0; +} + +static int tps25750_reset(struct tps6598x *tps) +{ + return tps6598x_exec_cmd_tmo(tps, "GAID", 0, NULL, 0, NULL, 2000, 0); +} + +static int tps6598x_reset(struct tps6598x *tps) +{ + return 0; +} + static int tps25750_register_port(struct tps6598x *tps, struct fwnode_handle *fwnode) { @@ -1182,7 +1296,6 @@ 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) @@ -1191,12 +1304,18 @@ static int tps6598x_probe(struct i2c_client *client) mutex_init(&tps->lock); tps->dev = &client->dev; + tps->reset = devm_gpiod_get_optional(tps->dev, "reset", GPIOD_OUT_LOW); + if (IS_ERR(tps->reset)) + return dev_err_probe(tps->dev, PTR_ERR(tps->reset), + "failed to get reset GPIO\n"); + if (tps->reset) + msleep(TPS_SETUP_MS); + tps->regmap = devm_regmap_init_i2c(client, &tps6598x_regmap_config); if (IS_ERR(tps->regmap)) return PTR_ERR(tps->regmap); - is_tps25750 = device_is_compatible(tps->dev, "ti,tps25750"); - if (!is_tps25750) { + if (!device_is_compatible(tps->dev, "ti,tps25750")) { ret = tps6598x_read32(tps, TPS_REG_VID, &vid); if (ret < 0 || !vid) return -ENODEV; @@ -1239,8 +1358,8 @@ static int tps6598x_probe(struct i2c_client *client) if (ret < 0) return ret; - if (is_tps25750 && ret == TPS_MODE_PTCH) { - ret = tps25750_init(tps); + if (ret == TPS_MODE_PTCH) { + ret = tps->data->init(tps); if (ret) return ret; } @@ -1328,8 +1447,8 @@ 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); + tps->data->reset(tps); + return ret; } @@ -1346,8 +1465,10 @@ static void tps6598x_remove(struct i2c_client *client) 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); + tps->data->reset(tps); + + if (tps->reset) + gpiod_set_value_cansleep(tps->reset, 1); } static int __maybe_unused tps6598x_suspend(struct device *dev) @@ -1358,6 +1479,8 @@ static int __maybe_unused tps6598x_suspend(struct device *dev) if (tps->wakeup) { disable_irq(client->irq); enable_irq_wake(client->irq); + } else if (tps->reset) { + gpiod_set_value_cansleep(tps->reset, 1); } if (!client->irq) @@ -1376,8 +1499,8 @@ static int __maybe_unused tps6598x_resume(struct device *dev) if (ret < 0) return ret; - if (device_is_compatible(tps->dev, "ti,tps25750") && ret == TPS_MODE_PTCH) { - ret = tps25750_init(tps); + if (ret == TPS_MODE_PTCH) { + ret = tps->data->init(tps); if (ret) return ret; } @@ -1385,6 +1508,9 @@ static int __maybe_unused tps6598x_resume(struct device *dev) if (tps->wakeup) { disable_irq_wake(client->irq); enable_irq(client->irq); + } else if (tps->reset) { + gpiod_set_value_cansleep(tps->reset, 0); + msleep(TPS_SETUP_MS); } if (!client->irq) @@ -1403,6 +1529,8 @@ static const struct tipd_data cd321x_data = { .register_port = tps6598x_register_port, .trace_power_status = trace_tps6598x_power_status, .trace_status = trace_tps6598x_status, + .init = cd321x_init, + .reset = cd321x_reset, }; static const struct tipd_data tps6598x_data = { @@ -1410,6 +1538,9 @@ static const struct tipd_data tps6598x_data = { .register_port = tps6598x_register_port, .trace_power_status = trace_tps6598x_power_status, .trace_status = trace_tps6598x_status, + .apply_patch = tps6598x_apply_patch, + .init = tps6598x_init, + .reset = tps6598x_reset, }; static const struct tipd_data tps25750_data = { @@ -1418,6 +1549,8 @@ static const struct tipd_data tps25750_data = { .trace_power_status = trace_tps25750_power_status, .trace_status = trace_tps25750_status, .apply_patch = tps25750_apply_patch, + .init = tps25750_init, + .reset = tps25750_reset, }; static const struct of_device_id tps6598x_of_match[] = { |