On Sun, Oct 01, 2023 at 04:11:24AM -0400, Abdel Alkuor wrote: > From: Abdel Alkuor <abdelalkuor@xxxxxxxxxx> > > 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. > > Signed-off-by: Abdel Alkuor <abdelalkuor@xxxxxxxxxx> Reviewed-by: Heikki Krogerus <heikki.krogerus@xxxxxxxxxxxxxxx> > --- > Changes in v9: > - No changes > Changes in v8: > - Return mode when mode is checked > - Use device_is_compatible instead of of_device_is_compatible > Changes in v7: > - Add driver name to commit subject > Changes in v6: > - Don't check VID for tps25750 as the VID register doesn't exist > - Remove is_tps25750 flag from tps6598x struct > - Get patch address from reg property > Changes in v5: > - Incorporating tps25750 into tps6598x driver > drivers/usb/typec/tipd/core.c | 263 ++++++++++++++++++++++++++++++++-- > 1 file changed, 255 insertions(+), 8 deletions(-) > > diff --git a/drivers/usb/typec/tipd/core.c b/drivers/usb/typec/tipd/core.c > index c5bbf03cb74a..2e7b9eafaf04 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" > @@ -43,6 +44,23 @@ > /* 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, > @@ -595,13 +613,15 @@ 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: > @@ -711,6 +731,213 @@ static int devm_tps6598_psy_register(struct tps6598x *tps) > return PTR_ERR_OR_ZERO(tps->psy); > } > > +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; > + > + 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; > + > + 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); > + > + dev_info(tps->dev, "controller switched to \"APP\" mode\n"); > + > + return 0; > +}; > + > static int tps6598x_probe(struct i2c_client *client) > { > irq_handler_t irq_handler = tps6598x_interrupt; > @@ -723,6 +950,7 @@ 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) > @@ -735,9 +963,12 @@ 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 > @@ -768,12 +999,18 @@ static int tps6598x_probe(struct i2c_client *client) > tps->irq_handler = irq_handler; > /* 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_apply_patch(tps); > + if (ret) > + return ret; > + } > + > ret = tps6598x_write64(tps, TPS_REG_INT_MASK1, mask1); > if (ret) > - return ret; > + goto err_reset_controller; > > ret = tps6598x_read32(tps, TPS_REG_STATUS, &status); > if (ret < 0) > @@ -893,6 +1130,10 @@ 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; > } > > @@ -903,9 +1144,14 @@ 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) > @@ -948,6 +1194,7 @@ static const struct dev_pm_ops tps6598x_pm_ops = { > static const struct of_device_id tps6598x_of_match[] = { > { .compatible = "ti,tps6598x", }, > { .compatible = "apple,cd321x", }, > + { .compatible = "ti,tps25750", }, > {} > }; > MODULE_DEVICE_TABLE(of, tps6598x_of_match); > -- > 2.34.1 -- heikki
