@@ -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);