diff options
Diffstat (limited to 'drivers/usb/typec')
-rw-r--r-- | drivers/usb/typec/altmodes/Kconfig | 10 | ||||
-rw-r--r-- | drivers/usb/typec/altmodes/Makefile | 2 | ||||
-rw-r--r-- | drivers/usb/typec/altmodes/displayport.c | 14 | ||||
-rw-r--r-- | drivers/usb/typec/altmodes/displayport.h | 8 | ||||
-rw-r--r-- | drivers/usb/typec/altmodes/nvidia.c | 44 | ||||
-rw-r--r-- | drivers/usb/typec/mux/pi3usb30532.c | 3 | ||||
-rw-r--r-- | drivers/usb/typec/tcpm/fusb302.c | 438 | ||||
-rw-r--r-- | drivers/usb/typec/tcpm/tcpci.c | 10 | ||||
-rw-r--r-- | drivers/usb/typec/tcpm/tcpm.c | 32 | ||||
-rw-r--r-- | drivers/usb/typec/tcpm/wcove.c | 39 | ||||
-rw-r--r-- | drivers/usb/typec/ucsi/Makefile | 15 | ||||
-rw-r--r-- | drivers/usb/typec/ucsi/displayport.c | 315 | ||||
-rw-r--r-- | drivers/usb/typec/ucsi/trace.c | 12 | ||||
-rw-r--r-- | drivers/usb/typec/ucsi/trace.h | 26 | ||||
-rw-r--r-- | drivers/usb/typec/ucsi/ucsi.c | 404 | ||||
-rw-r--r-- | drivers/usb/typec/ucsi/ucsi.h | 118 | ||||
-rw-r--r-- | drivers/usb/typec/ucsi/ucsi_ccg.c | 884 |
17 files changed, 1996 insertions, 378 deletions
diff --git a/drivers/usb/typec/altmodes/Kconfig b/drivers/usb/typec/altmodes/Kconfig index ef2226eb7a33..187690fd1a5b 100644 --- a/drivers/usb/typec/altmodes/Kconfig +++ b/drivers/usb/typec/altmodes/Kconfig @@ -12,4 +12,14 @@ config TYPEC_DP_ALTMODE To compile this driver as a module, choose M here: the module will be called typec_displayport. +config TYPEC_NVIDIA_ALTMODE + tristate "NVIDIA Alternate Mode driver" + depends on TYPEC_DP_ALTMODE + help + Latest NVIDIA GPUs support VirtualLink devices. Select this + to enable support for VirtualLink devices with NVIDIA GPUs. + + To compile this driver as a module, choose M here: the + module will be called typec_displayport. + endmenu diff --git a/drivers/usb/typec/altmodes/Makefile b/drivers/usb/typec/altmodes/Makefile index eda8456f1c92..45717548b396 100644 --- a/drivers/usb/typec/altmodes/Makefile +++ b/drivers/usb/typec/altmodes/Makefile @@ -2,3 +2,5 @@ obj-$(CONFIG_TYPEC_DP_ALTMODE) += typec_displayport.o typec_displayport-y := displayport.o +obj-$(CONFIG_TYPEC_NVIDIA_ALTMODE) += typec_nvidia.o +typec_nvidia-y := nvidia.o diff --git a/drivers/usb/typec/altmodes/displayport.c b/drivers/usb/typec/altmodes/displayport.c index 610d790bc9be..4092248a5936 100644 --- a/drivers/usb/typec/altmodes/displayport.c +++ b/drivers/usb/typec/altmodes/displayport.c @@ -14,7 +14,7 @@ #include <linux/usb/pd_vdo.h> #include <linux/usb/typec_dp.h> -#define DP_HEADER(cmd) (VDO(USB_TYPEC_DP_SID, 1, cmd) | \ +#define DP_HEADER(_dp, cmd) (VDO((_dp)->alt->svid, 1, cmd) | \ VDO_OPOS(USB_TYPEC_DP_MODE)) enum { @@ -100,7 +100,7 @@ static int dp_altmode_configure(struct dp_altmode *dp, u8 con) if (dp->data.status & DP_STATUS_PREFER_MULTI_FUNC && pin_assign & DP_PIN_ASSIGN_MULTI_FUNC_MASK) pin_assign &= DP_PIN_ASSIGN_MULTI_FUNC_MASK; - else + else if (pin_assign & DP_PIN_ASSIGN_DP_ONLY_MASK) pin_assign &= DP_PIN_ASSIGN_DP_ONLY_MASK; if (!pin_assign) @@ -155,7 +155,7 @@ static int dp_altmode_configured(struct dp_altmode *dp) static int dp_altmode_configure_vdm(struct dp_altmode *dp, u32 conf) { - u32 header = DP_HEADER(DP_CMD_CONFIGURE); + u32 header = DP_HEADER(dp, DP_CMD_CONFIGURE); int ret; ret = typec_altmode_notify(dp->alt, TYPEC_STATE_SAFE, &dp->data); @@ -193,7 +193,7 @@ static void dp_altmode_work(struct work_struct *work) dev_err(&dp->alt->dev, "failed to enter mode\n"); break; case DP_STATE_UPDATE: - header = DP_HEADER(DP_CMD_STATUS_UPDATE); + header = DP_HEADER(dp, DP_CMD_STATUS_UPDATE); vdo = 1; ret = typec_altmode_vdm(dp->alt, header, &vdo, 2); if (ret) @@ -507,7 +507,7 @@ static const struct attribute_group dp_altmode_group = { .attrs = dp_altmode_attrs, }; -static int dp_altmode_probe(struct typec_altmode *alt) +int dp_altmode_probe(struct typec_altmode *alt) { const struct typec_altmode *port = typec_altmode_get_partner(alt); struct dp_altmode *dp; @@ -545,14 +545,16 @@ static int dp_altmode_probe(struct typec_altmode *alt) return 0; } +EXPORT_SYMBOL_GPL(dp_altmode_probe); -static void dp_altmode_remove(struct typec_altmode *alt) +void dp_altmode_remove(struct typec_altmode *alt) { struct dp_altmode *dp = typec_altmode_get_drvdata(alt); sysfs_remove_group(&alt->dev.kobj, &dp_altmode_group); cancel_work_sync(&dp->work); } +EXPORT_SYMBOL_GPL(dp_altmode_remove); static const struct typec_device_id dp_typec_id[] = { { USB_TYPEC_DP_SID, USB_TYPEC_DP_MODE }, diff --git a/drivers/usb/typec/altmodes/displayport.h b/drivers/usb/typec/altmodes/displayport.h new file mode 100644 index 000000000000..e120364da9fd --- /dev/null +++ b/drivers/usb/typec/altmodes/displayport.h @@ -0,0 +1,8 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#if IS_ENABLED(CONFIG_TYPEC_DP_ALTMODE) +int dp_altmode_probe(struct typec_altmode *alt); +void dp_altmode_remove(struct typec_altmode *alt); +#else +int dp_altmode_probe(struct typec_altmode *alt) { return -ENOTSUPP; } +void dp_altmode_remove(struct typec_altmode *alt) { } +#endif /* CONFIG_TYPEC_DP_ALTMODE */ diff --git a/drivers/usb/typec/altmodes/nvidia.c b/drivers/usb/typec/altmodes/nvidia.c new file mode 100644 index 000000000000..c36769736405 --- /dev/null +++ b/drivers/usb/typec/altmodes/nvidia.c @@ -0,0 +1,44 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2019 NVIDIA Corporation. All rights reserved. + * + * NVIDIA USB Type-C Alt Mode Driver + */ +#include <linux/module.h> +#include <linux/usb/typec_altmode.h> +#include <linux/usb/typec_dp.h> +#include "displayport.h" + +static int nvidia_altmode_probe(struct typec_altmode *alt) +{ + if (alt->svid == USB_TYPEC_NVIDIA_VLINK_SID) + return dp_altmode_probe(alt); + else + return -ENOTSUPP; +} + +static void nvidia_altmode_remove(struct typec_altmode *alt) +{ + if (alt->svid == USB_TYPEC_NVIDIA_VLINK_SID) + dp_altmode_remove(alt); +} + +static const struct typec_device_id nvidia_typec_id[] = { + { USB_TYPEC_NVIDIA_VLINK_SID, TYPEC_ANY_MODE }, + { }, +}; +MODULE_DEVICE_TABLE(typec, nvidia_typec_id); + +static struct typec_altmode_driver nvidia_altmode_driver = { + .id_table = nvidia_typec_id, + .probe = nvidia_altmode_probe, + .remove = nvidia_altmode_remove, + .driver = { + .name = "typec_nvidia", + .owner = THIS_MODULE, + }, +}; +module_typec_altmode_driver(nvidia_altmode_driver); + +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("NVIDIA USB Type-C Alt Mode Driver"); diff --git a/drivers/usb/typec/mux/pi3usb30532.c b/drivers/usb/typec/mux/pi3usb30532.c index 64eb5983e17a..9294e85fd34b 100644 --- a/drivers/usb/typec/mux/pi3usb30532.c +++ b/drivers/usb/typec/mux/pi3usb30532.c @@ -84,7 +84,8 @@ static int pi3usb30532_mux_set(struct typec_mux *mux, int state) switch (state) { case TYPEC_STATE_SAFE: - new_conf = PI3USB30532_CONF_OPEN; + new_conf = (new_conf & PI3USB30532_CONF_SWAP) | + PI3USB30532_CONF_OPEN; break; case TYPEC_STATE_USB: new_conf = (new_conf & PI3USB30532_CONF_SWAP) | diff --git a/drivers/usb/typec/tcpm/fusb302.c b/drivers/usb/typec/tcpm/fusb302.c index e9344997329c..7302f7501ec9 100644 --- a/drivers/usb/typec/tcpm/fusb302.c +++ b/drivers/usb/typec/tcpm/fusb302.c @@ -23,6 +23,7 @@ #include <linux/sched/clock.h> #include <linux/seq_file.h> #include <linux/slab.h> +#include <linux/spinlock.h> #include <linux/string.h> #include <linux/types.h> #include <linux/usb/typec.h> @@ -78,6 +79,10 @@ struct fusb302_chip { struct regulator *vbus; + spinlock_t irq_lock; + struct work_struct irq_work; + bool irq_suspended; + bool irq_while_suspended; int gpio_int_n; int gpio_int_n_irq; struct extcon_dev *extcon; @@ -85,9 +90,6 @@ struct fusb302_chip { struct workqueue_struct *wq; struct delayed_work bc_lvl_handler; - atomic_t pm_suspend; - atomic_t i2c_busy; - /* lock for sharing chip states */ struct mutex lock; @@ -99,7 +101,6 @@ struct fusb302_chip { bool intr_comp_chng; /* port status */ - bool pull_up; bool vconn_on; bool vbus_on; bool charge_on; @@ -124,13 +125,13 @@ struct fusb302_chip { */ #ifdef CONFIG_DEBUG_FS - static bool fusb302_log_full(struct fusb302_chip *chip) { return chip->logbuffer_tail == (chip->logbuffer_head + 1) % LOG_BUFFER_ENTRIES; } +__printf(2, 0) static void _fusb302_log(struct fusb302_chip *chip, const char *fmt, va_list args) { @@ -234,43 +235,15 @@ static void fusb302_debugfs_exit(const struct fusb302_chip *chip) { } #endif -#define FUSB302_RESUME_RETRY 10 -#define FUSB302_RESUME_RETRY_SLEEP 50 - -static bool fusb302_is_suspended(struct fusb302_chip *chip) -{ - int retry_cnt; - - for (retry_cnt = 0; retry_cnt < FUSB302_RESUME_RETRY; retry_cnt++) { - if (atomic_read(&chip->pm_suspend)) { - dev_err(chip->dev, "i2c: pm suspend, retry %d/%d\n", - retry_cnt + 1, FUSB302_RESUME_RETRY); - msleep(FUSB302_RESUME_RETRY_SLEEP); - } else { - return false; - } - } - - return true; -} - static int fusb302_i2c_write(struct fusb302_chip *chip, u8 address, u8 data) { int ret = 0; - atomic_set(&chip->i2c_busy, 1); - - if (fusb302_is_suspended(chip)) { - atomic_set(&chip->i2c_busy, 0); - return -ETIMEDOUT; - } - ret = i2c_smbus_write_byte_data(chip->i2c_client, address, data); if (ret < 0) fusb302_log(chip, "cannot write 0x%02x to 0x%02x, ret=%d", data, address, ret); - atomic_set(&chip->i2c_busy, 0); return ret; } @@ -282,19 +255,12 @@ static int fusb302_i2c_block_write(struct fusb302_chip *chip, u8 address, if (length <= 0) return ret; - atomic_set(&chip->i2c_busy, 1); - - if (fusb302_is_suspended(chip)) { - atomic_set(&chip->i2c_busy, 0); - return -ETIMEDOUT; - } ret = i2c_smbus_write_i2c_block_data(chip->i2c_client, address, length, data); if (ret < 0) fusb302_log(chip, "cannot block write 0x%02x, len=%d, ret=%d", address, length, ret); - atomic_set(&chip->i2c_busy, 0); return ret; } @@ -304,18 +270,10 @@ static int fusb302_i2c_read(struct fusb302_chip *chip, { int ret = 0; - atomic_set(&chip->i2c_busy, 1); - - if (fusb302_is_suspended(chip)) { - atomic_set(&chip->i2c_busy, 0); - return -ETIMEDOUT; - } - ret = i2c_smbus_read_byte_data(chip->i2c_client, address); *data = (u8)ret; if (ret < 0) fusb302_log(chip, "cannot read %02x, ret=%d", address, ret); - atomic_set(&chip->i2c_busy, 0); return ret; } @@ -327,12 +285,6 @@ static int fusb302_i2c_block_read(struct fusb302_chip *chip, u8 address, if (length <= 0) return ret; - atomic_set(&chip->i2c_busy, 1); - - if (fusb302_is_suspended(chip)) { - atomic_set(&chip->i2c_busy, 0); - return -ETIMEDOUT; - } ret = i2c_smbus_read_i2c_block_data(chip->i2c_client, address, length, data); @@ -348,8 +300,6 @@ static int fusb302_i2c_block_read(struct fusb302_chip *chip, u8 address, } done: - atomic_set(&chip->i2c_busy, 0); - return ret; } @@ -519,32 +469,6 @@ static int tcpm_get_current_limit(struct tcpc_dev *dev) return current_limit; } -static int fusb302_set_cc_pull(struct fusb302_chip *chip, - bool pull_up, bool pull_down) -{ - int ret = 0; - u8 data = 0x00; - u8 mask = FUSB_REG_SWITCHES0_CC1_PU_EN | - FUSB_REG_SWITCHES0_CC2_PU_EN | - FUSB_REG_SWITCHES0_CC1_PD_EN | - FUSB_REG_SWITCHES0_CC2_PD_EN; - - if (pull_up) - data |= (chip->cc_polarity == TYPEC_POLARITY_CC1) ? - FUSB_REG_SWITCHES0_CC1_PU_EN : - FUSB_REG_SWITCHES0_CC2_PU_EN; - if (pull_down) - data |= FUSB_REG_SWITCHES0_CC1_PD_EN | - FUSB_REG_SWITCHES0_CC2_PD_EN; - ret = fusb302_i2c_mask_write(chip, FUSB_REG_SWITCHES0, - mask, data); - if (ret < 0) - return ret; - chip->pull_up = pull_up; - - return ret; -} - static int fusb302_set_src_current(struct fusb302_chip *chip, enum src_current_status status) { @@ -634,6 +558,8 @@ static int fusb302_set_toggling(struct fusb302_chip *chip, return ret; chip->intr_togdone = false; } else { + /* Datasheet says vconn MUST be off when toggling */ + WARN(chip->vconn_on, "Vconn is on during toggle start"); /* unmask TOGDONE interrupt */ ret = fusb302_i2c_clear_bits(chip, FUSB_REG_MASKA, FUSB_REG_MASKA_TOGDONE); @@ -676,26 +602,27 @@ static int tcpm_set_cc(struct tcpc_dev *dev, enum typec_cc_status cc) { struct fusb302_chip *chip = container_of(dev, struct fusb302_chip, tcpc_dev); + u8 switches0_mask = FUSB_REG_SWITCHES0_CC1_PU_EN | + FUSB_REG_SWITCHES0_CC2_PU_EN | + FUSB_REG_SWITCHES0_CC1_PD_EN | + FUSB_REG_SWITCHES0_CC2_PD_EN; + u8 rd_mda, switches0_data = 0x00; int ret = 0; - bool pull_up, pull_down; - u8 rd_mda; - enum toggling_mode mode; mutex_lock(&chip->lock); switch (cc) { case TYPEC_CC_OPEN: - pull_up = false; - pull_down = false; break; case TYPEC_CC_RD: - pull_up = false; - pull_down = true; + switches0_data |= FUSB_REG_SWITCHES0_CC1_PD_EN | + FUSB_REG_SWITCHES0_CC2_PD_EN; break; case TYPEC_CC_RP_DEF: case TYPEC_CC_RP_1_5: case TYPEC_CC_RP_3_0: - pull_up = true; - pull_down = false; + switches0_data |= (chip->cc_polarity == TYPEC_POLARITY_CC1) ? + FUSB_REG_SWITCHES0_CC1_PU_EN : + FUSB_REG_SWITCHES0_CC2_PU_EN; break; default: fusb302_log(chip, "unsupported cc value %s", @@ -703,34 +630,38 @@ static int tcpm_set_cc(struct tcpc_dev *dev, enum typec_cc_status cc) ret = -EINVAL; goto done; } + + fusb302_log(chip, "cc := %s", typec_cc_status_name[cc]); + ret = fusb302_set_toggling(chip, TOGGLING_MODE_OFF); if (ret < 0) { - fusb302_log(chip, "cannot stop toggling, ret=%d", ret); + fusb302_log(chip, "cannot set toggling mode, ret=%d", ret); goto done; } - ret = fusb302_set_cc_pull(chip, pull_up, pull_down); + + ret = fusb302_i2c_mask_write(chip, FUSB_REG_SWITCHES0, + switches0_mask, switches0_data); if (ret < 0) { - fusb302_log(chip, - "cannot set cc pulling up %s, down %s, ret = %d", - pull_up ? "True" : "False", - pull_down ? "True" : "False", - ret); + fusb302_log(chip, "cannot set pull-up/-down, ret = %d", ret); goto done; } /* reset the cc status */ chip->cc1 = TYPEC_CC_OPEN; chip->cc2 = TYPEC_CC_OPEN; + /* adjust current for SRC */ - if (pull_up) { - ret = fusb302_set_src_current(chip, cc_src_current[cc]); - if (ret < 0) { - fusb302_log(chip, "cannot set src current %s, ret=%d", - typec_cc_status_name[cc], ret); - goto done; - } + ret = fusb302_set_src_current(chip, cc_src_current[cc]); + if (ret < 0) { + fusb302_log(chip, "cannot set src current %s, ret=%d", + typec_cc_status_name[cc], ret); + goto done; } + /* enable/disable interrupts, BC_LVL for SNK and COMP_CHNG for SRC */ - if (pull_up) { + switch (cc) { + case TYPEC_CC_RP_DEF: + case TYPEC_CC_RP_1_5: + case TYPEC_CC_RP_3_0: rd_mda = rd_mda_value[cc_src_current[cc]]; ret = fusb302_i2c_write(chip, FUSB_REG_MEASURE, rd_mda); if (ret < 0) { @@ -748,10 +679,9 @@ static int tcpm_set_cc(struct tcpc_dev *dev, enum typec_cc_status cc) ret); goto done; } - chip->intr_bc_lvl = false; chip->intr_comp_chng = true; - } - if (pull_down) { + break; + case TYPEC_CC_RD: ret = fusb302_i2c_mask_write(chip, FUSB_REG_MASK, FUSB_REG_MASK_BC_LVL | FUSB_REG_MASK_COMP_CHNG, @@ -762,32 +692,10 @@ static int tcpm_set_cc(struct tcpc_dev *dev, enum typec_cc_status cc) goto done; } chip->intr_bc_lvl = true; - chip->intr_comp_chng = false; - } - fusb302_log(chip, "cc := %s", typec_cc_status_name[cc]); - - /* Enable detection for fixed SNK or SRC only roles */ - switch (cc) { - case TYPEC_CC_RD: - mode = TOGGLING_MODE_SNK; - break; - case TYPEC_CC_RP_DEF: - case TYPEC_CC_RP_1_5: - case TYPEC_CC_RP_3_0: - mode = TOGGLING_MODE_SRC; break; default: - mode = TOGGLING_MODE_OFF; break; } - - if (mode != TOGGLING_MODE_OFF) { - ret = fusb302_set_toggling(chip, mode); - if (ret < 0) - fusb302_log(chip, - "cannot set fixed role toggling mode, ret=%d", - ret); - } done: mutex_unlock(&chip->lock); @@ -1005,13 +913,27 @@ done: return ret; } -static int tcpm_start_drp_toggling(struct tcpc_dev *dev, - enum typec_cc_status cc) +static int tcpm_start_toggling(struct tcpc_dev *dev, + enum typec_port_type port_type, + enum typec_cc_status cc) { struct fusb302_chip *chip = container_of(dev, struct fusb302_chip, tcpc_dev); + enum toggling_mode mode = TOGGLING_MODE_OFF; int ret = 0; + switch (port_type) { + case TYPEC_PORT_SRC: + mode = TOGGLING_MODE_SRC; + break; + case TYPEC_PORT_SNK: + mode = TOGGLING_MODE_SNK; + break; + case TYPEC_PORT_DRP: + mode = TOGGLING_MODE_DRP; + break; + } + mutex_lock(&chip->lock); ret = fusb302_set_src_current(chip, cc_src_current[cc]); if (ret < 0) { @@ -1019,7 +941,7 @@ static int tcpm_start_drp_toggling(struct tcpc_dev *dev, typec_cc_status_name[cc], ret); goto done; } - ret = fusb302_set_toggling(chip, TOGGLING_MODE_DRP); + ret = fusb302_set_toggling(chip, mode); if (ret < 0) { fusb302_log(chip, "unable to start drp toggling, ret=%d", ret); @@ -1217,7 +1139,7 @@ static void init_tcpc_dev(struct tcpc_dev *fusb302_tcpc_dev) fusb302_tcpc_dev->set_vbus = tcpm_set_vbus; fusb302_tcpc_dev->set_pd_rx = tcpm_set_pd_rx; fusb302_tcpc_dev->set_roles = tcpm_set_roles; - fusb302_tcpc_dev->start_drp_toggling = tcpm_start_drp_toggling; + fusb302_tcpc_dev->start_toggling = tcpm_start_toggling; fusb302_tcpc_dev->pd_transmit = tcpm_pd_transmit; } @@ -1226,38 +1148,36 @@ static const char * const cc_polarity_name[] = { [TYPEC_POLARITY_CC2] = "Polarity_CC2", }; -static int fusb302_set_cc_polarity(struct fusb302_chip *chip, - enum typec_cc_polarity cc_polarity) +static int fusb302_set_cc_polarity_and_pull(struct fusb302_chip *chip, + enum typec_cc_polarity cc_polarity, + bool pull_up, bool pull_down) { int ret = 0; - u8 switches0_mask = FUSB_REG_SWITCHES0_CC1_PU_EN | - FUSB_REG_SWITCHES0_CC2_PU_EN | - FUSB_REG_SWITCHES0_VCONN_CC1 | - FUSB_REG_SWITCHES0_VCONN_CC2 | - FUSB_REG_SWITCHES0_MEAS_CC1 | - FUSB_REG_SWITCHES0_MEAS_CC2; u8 switches0_data = 0x00; u8 switches1_mask = FUSB_REG_SWITCHES1_TXCC1_EN | FUSB_REG_SWITCHES1_TXCC2_EN; u8 switches1_data = 0x00; + if (pull_down) + switches0_data |= FUSB_REG_SWITCHES0_CC1_PD_EN | + FUSB_REG_SWITCHES0_CC2_PD_EN; + if (cc_polarity == TYPEC_POLARITY_CC1) { - switches0_data = FUSB_REG_SWITCHES0_MEAS_CC1; + switches0_data |= FUSB_REG_SWITCHES0_MEAS_CC1; if (chip->vconn_on) switches0_data |= FUSB_REG_SWITCHES0_VCONN_CC2; - if (chip->pull_up) + if (pull_up) switches0_data |= FUSB_REG_SWITCHES0_CC1_PU_EN; switches1_data = FUSB_REG_SWITCHES1_TXCC1_EN; } else { - switches0_data = FUSB_REG_SWITCHES0_MEAS_CC2; + switches0_data |= FUSB_REG_SWITCHES0_MEAS_CC2; if (chip->vconn_on) switches0_data |= FUSB_REG_SWITCHES0_VCONN_CC1; - if (chip->pull_up) + if (pull_up) switches0_data |= FUSB_REG_SWITCHES0_CC2_PU_EN; switches1_data = FUSB_REG_SWITCHES1_TXCC2_EN; } - ret = fusb302_i2c_mask_write(chip, FUSB_REG_SWITCHES0, - switches0_mask, switches0_data); + ret = fusb302_i2c_write(chip, FUSB_REG_SWITCHES0, switches0_data); if (ret < 0) return ret; ret = fusb302_i2c_mask_write(chip, FUSB_REG_SWITCHES1, @@ -1278,16 +1198,10 @@ static int fusb302_handle_togdone_snk(struct fusb302_chip *chip, enum typec_cc_polarity cc_polarity; enum typec_cc_status cc_status_active, cc1, cc2; - /* set pull_up, pull_down */ - ret = fusb302_set_cc_pull(chip, false, true); - if (ret < 0) { - fusb302_log(chip, "cannot set cc to pull down, ret=%d", ret); - return ret; - } - /* set polarity */ + /* set polarity and pull_up, pull_down */ cc_polarity = (togdone_result == FUSB_REG_STATUS1A_TOGSS_SNK1) ? TYPEC_POLARITY_CC1 : TYPEC_POLARITY_CC2; - ret = fusb302_set_cc_polarity(chip, cc_polarity); + ret = fusb302_set_cc_polarity_and_pull(chip, cc_polarity, false, true); if (ret < 0) { fusb302_log(chip, "cannot set cc polarity %s, ret=%d", cc_polarity_name[cc_polarity], ret); @@ -1337,6 +1251,62 @@ static int fusb302_handle_togdone_snk(struct fusb302_chip *chip, return ret; } +/* On error returns < 0, otherwise a typec_cc_status value */ +static int fusb302_get_src_cc_status(struct fusb302_chip *chip, + enum typec_cc_polarity cc_polarity, + enum typec_cc_status *cc) +{ + u8 ra_mda = ra_mda_value[chip->src_current_status]; + u8 rd_mda = rd_mda_value[chip->src_current_status]; + u8 switches0_data, status0; + int ret; + + /* Step 1: Set switches so that we measure the right CC pin */ + switches0_data = (cc_polarity == TYPEC_POLARITY_CC1) ? + FUSB_REG_SWITCHES0_CC1_PU_EN | FUSB_REG_SWITCHES0_MEAS_CC1 : + FUSB_REG_SWITCHES0_CC2_PU_EN | FUSB_REG_SWITCHES0_MEAS_CC2; + ret = fusb302_i2c_write(chip, FUSB_REG_SWITCHES0, switches0_data); + if (ret < 0) + return ret; + + fusb302_i2c_read(chip, FUSB_REG_SWITCHES0, &status0); + fusb302_log(chip, "get_src_cc_status switches: 0x%0x", status0); + + /* Step 2: Set compararator volt to differentiate between Open and Rd */ + ret = fusb302_i2c_write(chip, FUSB_REG_MEASURE, rd_mda); + if (ret < 0) + return ret; + + usleep_range(50, 100); + ret = fusb302_i2c_read(chip, FUSB_REG_STATUS0, &status0); + if (ret < 0) + return ret; + + fusb302_log(chip, "get_src_cc_status rd_mda status0: 0x%0x", status0); + if (status0 & FUSB_REG_STATUS0_COMP) { + *cc = TYPEC_CC_OPEN; + return 0; + } + + /* Step 3: Set compararator input to differentiate between Rd and Ra. */ + ret = fusb302_i2c_write(chip, FUSB_REG_MEASURE, ra_mda); + if (ret < 0) + return ret; + + usleep_range(50, 100); + ret = fusb302_i2c_read(chip, FUSB_REG_STATUS0, &status0); + if (ret < 0) + return ret; + + fusb302_log(chip, "get_src_cc_status ra_mda status0: 0x%0x", status0); + if (status0 & FUSB_REG_STATUS0_COMP) + *cc = TYPEC_CC_RD; + else + *cc = TYPEC_CC_RA; + + return 0; +} + static int fusb302_handle_togdone_src(struct fusb302_chip *chip, u8 togdone_result) { @@ -1347,77 +1317,62 @@ static int fusb302_handle_togdone_src(struct fusb302_chip *chip, * - set I_COMP interrupt on */ int ret = 0; - u8 status0; - u8 ra_mda = ra_mda_value[chip->src_current_status]; u8 rd_mda = rd_mda_value[chip->src_current_status]; - bool ra_comp, rd_comp; + enum toggling_mode toggling_mode = chip->toggling_mode; enum typec_cc_polarity cc_polarity; - enum typec_cc_status cc_status_active, cc1, cc2; + enum typec_cc_status cc1, cc2; - /* set pull_up, pull_down */ - ret = fusb302_set_cc_pull(chip, true, false); - if (ret < 0) { - fusb302_log(chip, "cannot set cc to pull up, ret=%d", ret); + /* + * The toggle-engine will stop in a src state if it sees either Ra or + * Rd. Determine the status for both CC pins, starting with the one + * where toggling stopped, as that is where the switches point now. + */ + if (togdone_result == FUSB_REG_STATUS1A_TOGSS_SRC1) + ret = fusb302_get_src_cc_status(chip, TYPEC_POLARITY_CC1, &cc1); + else + ret = fusb302_get_src_cc_status(chip, TYPEC_POLARITY_CC2, &cc2); + if (ret < 0) return ret; - } - /* set polarity */ - cc_polarity = (togdone_result == FUSB_REG_STATUS1A_TOGSS_SRC1) ? - TYPEC_POLARITY_CC1 : TYPEC_POLARITY_CC2; - ret = fusb302_set_cc_polarity(chip, cc_polarity); + /* we must turn off toggling before we can measure the other pin */ + ret = fusb302_set_toggling(chip, TOGGLING_MODE_OFF); if (ret < 0) { - fusb302_log(chip, "cannot set cc polarity %s, ret=%d", - cc_polarity_name[cc_polarity], ret); + fusb302_log(chip, "cannot set toggling mode off, ret=%d", ret); return ret; } - /* fusb302_set_cc_polarity() has set the correct measure block */ - ret = fusb302_i2c_write(chip, FUSB_REG_MEASURE, rd_mda); - if (ret < 0) - return ret; - usleep_range(50, 100); - ret = fusb302_i2c_read(chip, FUSB_REG_STATUS0, &status0); + /* get the status of the other pin */ + if (togdone_result == FUSB_REG_STATUS1A_TOGSS_SRC1) + ret = fusb302_get_src_cc_status(chip, TYPEC_POLARITY_CC2, &cc2); + else + ret = fusb302_get_src_cc_status(chip, TYPEC_POLARITY_CC1, &cc1); if (ret < 0) return ret; - rd_comp = !!(status0 & FUSB_REG_STATUS0_COMP); - if (!rd_comp) { - ret = fusb302_i2c_write(chip, FUSB_REG_MEASURE, ra_mda); - if (ret < 0) - return ret; - usleep_range(50, 100); - ret = fusb302_i2c_read(chip, FUSB_REG_STATUS0, &status0); - if (ret < 0) - return ret; - ra_comp = !!(status0 & FUSB_REG_STATUS0_COMP); + + /* determine polarity based on the status of both pins */ + if (cc1 == TYPEC_CC_RD && + (cc2 == TYPEC_CC_OPEN || cc2 == TYPEC_CC_RA)) { + cc_polarity = TYPEC_POLARITY_CC1; + } else if (cc2 == TYPEC_CC_RD && + (cc1 == TYPEC_CC_OPEN || cc1 == TYPEC_CC_RA)) { + cc_polarity = TYPEC_POLARITY_CC2; + } else { + fusb302_log(chip, "unexpected CC status cc1=%s, cc2=%s, restarting toggling", + typec_cc_status_name[cc1], + typec_cc_status_name[cc2]); + return fusb302_set_toggling(chip, toggling_mode); } - if (rd_comp) - cc_status_active = TYPEC_CC_OPEN; - else if (ra_comp) - cc_status_active = TYPEC_CC_RD; - else - /* Ra is not supported, report as Open */ - cc_status_active = TYPEC_CC_OPEN; - /* restart toggling if the cc status on the active line is OPEN */ - if (cc_status_active == TYPEC_CC_OPEN) { - fusb302_log(chip, "restart toggling as CC_OPEN detected"); - ret = fusb302_set_toggling(chip, chip->toggling_mode); + /* set polarity and pull_up, pull_down */ + ret = fusb302_set_cc_polarity_and_pull(chip, cc_polarity, true, false); + if (ret < 0) { + fusb302_log(chip, "cannot set cc polarity %s, ret=%d", + cc_polarity_name[cc_polarity], ret); return ret; } /* update tcpm with the new cc value */ - cc1 = (cc_polarity == TYPEC_POLARITY_CC1) ? - cc_status_active : TYPEC_CC_OPEN; - cc2 = (cc_polarity == TYPEC_POLARITY_CC2) ? - cc_status_active : TYPEC_CC_OPEN; if ((chip->cc1 != cc1) || (chip->cc2 != cc2)) { chip->cc1 = cc1; chip->cc2 = cc2; tcpm_cc_change(chip->tcpm_port); } - /* turn off toggling */ - ret = fusb302_set_toggling(chip, TOGGLING_MODE_OFF); - if (ret < 0) { - fusb302_log(chip, - "cannot set toggling mode off, ret=%d", ret); - return ret; - } /* set MDAC to Rd threshold, and unmask I_COMP for unplug detection */ ret = fusb302_i2c_write(chip, FUSB_REG_MEASURE, rd_mda); if (ret < 0) @@ -1427,7 +1382,7 @@ static int fusb302_handle_togdone_src(struct fusb302_chip *chip, FUSB_REG_MASK_COMP_CHNG); if (ret < 0) { fusb302_log(chip, - "cannot unmask bc_lcl interrupt, ret=%d", ret); + "cannot unmask comp_chng interrupt, ret=%d", ret); return ret; } chip->intr_comp_chng = true; @@ -1532,6 +1487,25 @@ static int fusb302_pd_read_message(struct fusb302_chip *chip, static irqreturn_t fusb302_irq_intn(int irq, void *dev_id) { struct fusb302_chip *chip = dev_id; + unsigned long flags; + + /* Disable our level triggered IRQ until our irq_work has cleared it */ + disable_irq_nosync(chip->gpio_int_n_irq); + + spin_lock_irqsave(&chip->irq_lock, flags); + if (chip->irq_suspended) + chip->irq_while_suspended = true; + else + schedule_work(&chip->irq_work); + spin_unlock_irqrestore(&chip->irq_lock, flags); + + return IRQ_HANDLED; +} + +static void fusb302_irq_work(struct work_struct *work) +{ + struct fusb302_chip *chip = container_of(work, struct fusb302_chip, + irq_work); int ret = 0; u8 interrupt; u8 interrupta; @@ -1602,11 +1576,9 @@ static irqreturn_t fusb302_irq_intn(int irq, void *dev_id) fusb302_log(chip, "IRQ: COMP_CHNG, comp=%s", comp_result ? "true" : "false"); if (comp_result) { - /* cc level > Rd_threashold, detach */ - if (chip->cc_polarity == TYPEC_POLARITY_CC1) - chip->cc1 = TYPEC_CC_OPEN; - else - chip->cc2 = TYPEC_CC_OPEN; + /* cc level > Rd_threshold, detach */ + chip->cc1 = TYPEC_CC_OPEN; + chip->cc2 = TYPEC_CC_OPEN; tcpm_cc_change(chip->tcpm_port); } } @@ -1662,8 +1634,7 @@ static irqreturn_t fusb302_irq_intn(int irq, void *dev_id) } done: mutex_unlock(&chip->lock); - - return IRQ_HANDLED; + enable_irq(chip->gpio_int_n_irq); } static int init_gpio(struct fusb302_chip *chip) @@ -1779,6 +1750,8 @@ static int fusb302_probe(struct i2c_client *client, if (!chip->wq) return -ENOMEM; + spin_lock_init(&chip->irq_lock); + INIT_WORK(&chip->irq_work, fusb302_irq_work); INIT_DELAYED_WORK(&chip->bc_lvl_handler, fusb302_bc_lvl_handler_work); init_tcpc_dev(&chip->tcpc_dev); @@ -1798,10 +1771,9 @@ static int fusb302_probe(struct i2c_client *client, goto destroy_workqueue; } - ret = devm_request_threaded_irq(chip->dev, chip->gpio_int_n_irq, - NULL, fusb302_irq_intn, - IRQF_ONESHOT | IRQF_TRIGGER_LOW, - "fsc_interrupt_int_n", chip); + ret = request_irq(chip->gpio_int_n_irq, fusb302_irq_intn, + IRQF_ONESHOT | IRQF_TRIGGER_LOW, + "fsc_interrupt_int_n", chip); if (ret < 0) { dev_err(dev, "cannot request IRQ for GPIO Int_N, ret=%d", ret); goto tcpm_unregister_port; @@ -1824,6 +1796,10 @@ static int fusb302_remove(struct i2c_client *client) { struct fusb302_chip *chip = i2c_get_clientdata(client); + disable_irq_wake(chip->gpio_int_n_irq); + free_irq(chip->gpio_int_n_irq, chip); + cancel_work_sync(&chip->irq_work); + cancel_delayed_work_sync(&chip->bc_lvl_handler); tcpm_unregister_port(chip->tcpm_port); destroy_workqueue(chip->wq); fusb302_debugfs_exit(chip); @@ -1834,19 +1810,29 @@ static int fusb302_remove(struct i2c_client *client) static int fusb302_pm_suspend(struct device *dev) { struct fusb302_chip *chip = dev->driver_data; + unsigned long flags; - if (atomic_read(&chip->i2c_busy)) - return -EBUSY; - atomic_set(&chip->pm_suspend, 1); + spin_lock_irqsave(&chip->irq_lock, flags); + chip->irq_suspended = true; + spin_unlock_irqrestore(&chip->irq_lock, flags); + /* Make sure any pending irq_work is finished before the bus suspends */ + flush_work(&chip->irq_work); return 0; } static int fusb302_pm_resume(struct device *dev) { struct fusb302_chip *chip = dev->driver_data; + unsigned long flags; - atomic_set(&chip->pm_suspend, 0); + spin_lock_irqsave(&chip->irq_lock, flags); + if (chip->irq_while_suspended) { + schedule_work(&chip->irq_work); + chip->irq_while_suspended = false; + } + chip->irq_suspended = false; + spin_unlock_irqrestore(&chip->irq_lock, flags); return 0; } diff --git a/drivers/usb/typec/tcpm/tcpci.c b/drivers/usb/typec/tcpm/tcpci.c index ac6b418b15f1..c1f7073a56de 100644 --- a/drivers/usb/typec/tcpm/tcpci.c +++ b/drivers/usb/typec/tcpm/tcpci.c @@ -100,13 +100,17 @@ static int tcpci_set_cc(struct tcpc_dev *tcpc, enum typec_cc_status cc) return 0; } -static int tcpci_start_drp_toggling(struct tcpc_dev *tcpc, - enum typec_cc_status cc) +static int tcpci_start_toggling(struct tcpc_dev *tcpc, + enum typec_port_type port_type, + enum typec_cc_status cc) { int ret; struct tcpci *tcpci = tcpc_to_tcpci(tcpc); unsigned int reg = TCPC_ROLE_CTRL_DRP; + if (port_type != TYPEC_PORT_DRP) + return -EOPNOTSUPP; + /* Handle vendor drp toggling */ if (tcpci->data->start_drp_toggling) { ret = tcpci->data->start_drp_toggling(tcpci, tcpci->data, cc); @@ -511,7 +515,7 @@ struct tcpci *tcpci_register_port(struct device *dev, struct tcpci_data *data) tcpci->tcpc.get_cc = tcpci_get_cc; tcpci->tcpc.set_polarity = tcpci_set_polarity; tcpci->tcpc.set_vconn = tcpci_set_vconn; - tcpci->tcpc.start_drp_toggling = tcpci_start_drp_toggling; + tcpci->tcpc.start_toggling = tcpci_start_toggling; tcpci->tcpc.set_pd_rx = tcpci_set_pd_rx; tcpci->tcpc.set_roles = tcpci_set_roles; diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c index a2233d72ae7c..fba32d84e578 100644 --- a/drivers/usb/typec/tcpm/tcpm.c +++ b/drivers/usb/typec/tcpm/tcpm.c @@ -31,7 +31,7 @@ #define FOREACH_STATE(S) \ S(INVALID_STATE), \ - S(DRP_TOGGLING), \ + S(TOGGLING), \ S(SRC_UNATTACHED), \ S(SRC_ATTACH_WAIT), \ S(SRC_ATTACHED), \ @@ -472,7 +472,7 @@ static void tcpm_log(struct tcpm_port *port, const char *fmt, ...) /* Do not log while disconnected and unattached */ if (tcpm_port_is_disconnected(port) && (port->state == SRC_UNATTACHED || port->state == SNK_UNATTACHED || - port->state == DRP_TOGGLING)) + port->state == TOGGLING)) return; va_start(args, fmt); @@ -2540,20 +2540,16 @@ static int tcpm_set_charge(struct tcpm_port *port, bool charge) return 0; } -static bool tcpm_start_drp_toggling(struct tcpm_port *port, - enum typec_cc_status cc) +static bool tcpm_start_toggling(struct tcpm_port *port, enum typec_cc_status cc) { int ret; - if (port->tcpc->start_drp_toggling && - port->port_type == TYPEC_PORT_DRP) { - tcpm_log_force(port, "Start DRP toggling"); - ret = port->tcpc->start_drp_toggling(port->tcpc, cc); - if (!ret) - return true; - } + if (!port->tcpc->start_toggling) + return false; - return false; + tcpm_log_force(port, "Start toggling"); + ret = port->tcpc->start_toggling(port->tcpc, port->port_type, cc); + return ret == 0; } static void tcpm_set_cc(struct tcpm_port *port, enum typec_cc_status cc) @@ -2847,15 +2843,15 @@ static void run_state_machine(struct tcpm_port *port) port->enter_state = port->state; switch (port->state) { - case DRP_TOGGLING: + case TOGGLING: break; /* SRC states */ case SRC_UNATTACHED: if (!port->non_pd_role_swap) tcpm_swap_complete(port, -ENOTCONN); tcpm_src_detach(port); - if (tcpm_start_drp_toggling(port, tcpm_rp_cc(port))) { - tcpm_set_state(port, DRP_TOGGLING, 0); + if (tcpm_start_toggling(port, tcpm_rp_cc(port))) { + tcpm_set_state(port, TOGGLING, 0); break; } tcpm_set_cc(port, tcpm_rp_cc(port)); @@ -3053,8 +3049,8 @@ static void run_state_machine(struct tcpm_port *port) tcpm_swap_complete(port, -ENOTCONN); tcpm_pps_complete(port, -ENOTCONN); tcpm_snk_detach(port); - if (tcpm_start_drp_toggling(port, TYPEC_CC_RD)) { - tcpm_set_state(port, DRP_TOGGLING, 0); + if (tcpm_start_toggling(port, TYPEC_CC_RD)) { + tcpm_set_state(port, TOGGLING, 0); break; } tcpm_set_cc(port, TYPEC_CC_RD); @@ -3621,7 +3617,7 @@ static void _tcpm_cc_change(struct tcpm_port *port, enum typec_cc_status cc1, : "connected"); switch (port->state) { - case DRP_TOGGLING: + case TOGGLING: if (tcpm_port_is_debug(port) || tcpm_port_is_audio(port) || tcpm_port_is_source(port)) tcpm_set_state(port, SRC_ATTACH_WAIT, 0); diff --git a/drivers/usb/typec/tcpm/wcove.c b/drivers/usb/typec/tcpm/wcove.c index 6770afd40765..6b317c150bdd 100644 --- a/drivers/usb/typec/tcpm/wcove.c +++ b/drivers/usb/typec/tcpm/wcove.c @@ -416,12 +416,16 @@ static int wcove_pd_transmit(struct tcpc_dev *tcpc, return regmap_write(wcove->regmap, USBC_TXCMD, cmd | USBC_TXCMD_START); } -static int wcove_start_drp_toggling(struct tcpc_dev *tcpc, - enum typec_cc_status cc) +static int wcove_start_toggling(struct tcpc_dev *tcpc, + enum typec_port_type port_type, + enum typec_cc_status cc) { struct wcove_typec *wcove = tcpc_to_wcove(tcpc); unsigned int usbc_ctrl; + if (port_type != TYPEC_PORT_DRP) + return -EOPNOTSUPP; + usbc_ctrl = USBC_CONTROL1_MODE_DRP | USBC_CONTROL1_DRPTOGGLE_RANDOM; switch (cc) { @@ -587,17 +591,14 @@ static const u32 snk_pdo[] = { PDO_VAR(5000, 12000, 3000), }; -static struct tcpc_config wcove_typec_config = { - .src_pdo = src_pdo, - .nr_src_pdo = ARRAY_SIZE(src_pdo), - .snk_pdo = snk_pdo, - .nr_snk_pdo = ARRAY_SIZE(snk_pdo), - - .operating_snk_mw = 15000, - - .type = TYPEC_PORT_DRP, - .data = TYPEC_PORT_DRD, - .default_role = TYPEC_SINK, +static const struct property_entry wcove_props[] = { + PROPERTY_ENTRY_STRING("data-role", "dual"), + PROPERTY_ENTRY_STRING("power-role", "dual"), + PROPERTY_ENTRY_STRING("try-power-role", "sink"), + PROPERTY_ENTRY_U32_ARRAY("source-pdos", src_pdo), + PROPERTY_ENTRY_U32_ARRAY("sink-pdos", snk_pdo), + PROPERTY_ENTRY_U32("op-sink-microwatt", 15000), + { } }; static int wcove_typec_probe(struct platform_device *pdev) @@ -642,23 +643,28 @@ static int wcove_typec_probe(struct platform_device *pdev) wcove->tcpc.set_polarity = wcove_set_polarity; wcove->tcpc.set_vconn = wcove_set_vconn; wcove->tcpc.set_current_limit = wcove_set_current_limit; - wcove->tcpc.start_drp_toggling = wcove_start_drp_toggling; + wcove->tcpc.start_toggling = wcove_start_toggling; wcove->tcpc.set_pd_rx = wcove_set_pd_rx; wcove->tcpc.set_roles = wcove_set_roles; wcove->tcpc.pd_transmit = wcove_pd_transmit; - wcove->tcpc.config = &wcove_typec_config; + wcove->tcpc.fwnode = fwnode_create_software_node(wcove_props, NULL); + if (IS_ERR(wcove->tcpc.fwnode)) + return PTR_ERR(wcove->tcpc.fwnode); wcove->tcpm = tcpm_register_port(wcove->dev, &wcove->tcpc); - if (IS_ERR(wcove->tcpm)) + if (IS_ERR(wcove->tcpm)) { + fwnode_remove_software_node(wcove->tcpc.fwnode); return PTR_ERR(wcove->tcpm); + } ret = devm_request_threaded_irq(&pdev->dev, irq, NULL, wcove_typec_irq, IRQF_ONESHOT, "wcove_typec", wcove); if (ret) { tcpm_unregister_port(wcove->tcpm); + fwnode_remove_software_node(wcove->tcpc.fwnode); return ret; } @@ -678,6 +684,7 @@ static int wcove_typec_remove(struct platform_device *pdev) regmap_write(wcove->regmap, USBC_IRQMASK2, val | USBC_IRQMASK2_ALL); tcpm_unregister_port(wcove->tcpm); + fwnode_remove_software_node(wcove->tcpc.fwnode); return 0; } diff --git a/drivers/usb/typec/ucsi/Makefile b/drivers/usb/typec/ucsi/Makefile index 2f4900b26210..b35e15a1f02c 100644 --- a/drivers/usb/typec/ucsi/Makefile +++ b/drivers/usb/typec/ucsi/Makefile @@ -1,12 +1,15 @@ # SPDX-License-Identifier: GPL-2.0 -CFLAGS_trace.o := -I$(src) +CFLAGS_trace.o := -I$(src) -obj-$(CONFIG_TYPEC_UCSI) += typec_ucsi.o +obj-$(CONFIG_TYPEC_UCSI) += typec_ucsi.o -typec_ucsi-y := ucsi.o +typec_ucsi-y := ucsi.o -typec_ucsi-$(CONFIG_TRACING) += trace.o +typec_ucsi-$(CONFIG_TRACING) += trace.o -obj-$(CONFIG_UCSI_ACPI) += ucsi_acpi.o +ifneq ($(CONFIG_TYPEC_DP_ALTMODE),) + typec_ucsi-y += displayport.o +endif -obj-$(CONFIG_UCSI_CCG) += ucsi_ccg.o +obj-$(CONFIG_UCSI_ACPI) += ucsi_acpi.o +obj-$(CONFIG_UCSI_CCG) += ucsi_ccg.o diff --git a/drivers/usb/typec/ucsi/displayport.c b/drivers/usb/typec/ucsi/displayport.c new file mode 100644 index 000000000000..6c103697c582 --- /dev/null +++ b/drivers/usb/typec/ucsi/displayport.c @@ -0,0 +1,315 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * UCSI DisplayPort Alternate Mode Support + * + * Copyright (C) 2018, Intel Corporation + * Author: Heikki Krogerus <heikki.krogerus@linux.intel.com> + */ + +#include <linux/usb/typec_dp.h> +#include <linux/usb/pd_vdo.h> + +#include "ucsi.h" + +#define UCSI_CMD_SET_NEW_CAM(_con_num_, _enter_, _cam_, _am_) \ + (UCSI_SET_NEW_CAM | ((_con_num_) << 16) | ((_enter_) << 23) | \ + ((_cam_) << 24) | ((u64)(_am_) << 32)) + +struct ucsi_dp { + struct typec_displayport_data data; + struct ucsi_connector *con; + struct typec_altmode *alt; + struct work_struct work; + int offset; + + bool override; + bool initialized; + + u32 header; + u32 *vdo_data; + u8 vdo_size; +}; + +/* + * Note. Alternate mode control is optional feature in UCSI. It means that even + * if the system supports alternate modes, the OS may not be aware of them. + * + * In most cases however, the OS will be able to see the supported alternate + * modes, but it may still not be able to configure them, not even enter or exit + * them. That is because UCSI defines alt mode details and alt mode "overriding" + * as separate options. + * + * In case alt mode details are supported, but overriding is not, the driver + * will still display the supported pin assignments and configuration, but any + * changes the user attempts to do will lead into failure with return value of + * -EOPNOTSUPP. + */ + +static int ucsi_displayport_enter(struct typec_altmode *alt) +{ + struct ucsi_dp *dp = typec_altmode_get_drvdata(alt); + struct ucsi_control ctrl; + u8 cur = 0; + int ret; + + mutex_lock(&dp->con->lock); + + if (!dp->override && dp->initialized) { + const struct typec_altmode *p = typec_altmode_get_partner(alt); + + dev_warn(&p->dev, + "firmware doesn't support alternate mode overriding\n"); + mutex_unlock(&dp->con->lock); + return -EOPNOTSUPP; + } + + UCSI_CMD_GET_CURRENT_CAM(ctrl, dp->con->num); + ret = ucsi_send_command(dp->con->ucsi, &ctrl, &cur, sizeof(cur)); + if (ret < 0) { + if (dp->con->ucsi->ppm->data->version > 0x0100) { + mutex_unlock(&dp->con->lock); + return ret; + } + cur = 0xff; + } + + if (cur != 0xff) { + mutex_unlock(&dp->con->lock); + return -EBUSY; + } + + /* + * We can't send the New CAM command yet to the PPM as it needs the + * configuration value as well. Pretending that we have now entered the + * mode, and letting the alt mode driver continue. + */ + + dp->header = VDO(USB_TYPEC_DP_SID, 1, CMD_ENTER_MODE); + dp->header |= VDO_OPOS(USB_TYPEC_DP_MODE); + dp->header |= VDO_CMDT(CMDT_RSP_ACK); + + dp->vdo_data = NULL; + dp->vdo_size = 1; + + schedule_work(&dp->work); + + mutex_unlock(&dp->con->lock); + + return 0; +} + +static int ucsi_displayport_exit(struct typec_altmode *alt) +{ + struct ucsi_dp *dp = typec_altmode_get_drvdata(alt); + struct ucsi_control ctrl; + int ret = 0; + + mutex_lock(&dp->con->lock); + + if (!dp->override) { + const struct typec_altmode *p = typec_altmode_get_partner(alt); + + dev_warn(&p->dev, + "firmware doesn't support alternate mode overriding\n"); + ret = -EOPNOTSUPP; + goto out_unlock; + } + + ctrl.raw_cmd = UCSI_CMD_SET_NEW_CAM(dp->con->num, 0, dp->offset, 0); + ret = ucsi_send_command(dp->con->ucsi, &ctrl, NULL, 0); + if (ret < 0) + goto out_unlock; + + dp->header = VDO(USB_TYPEC_DP_SID, 1, CMD_EXIT_MODE); + dp->header |= VDO_OPOS(USB_TYPEC_DP_MODE); + dp->header |= VDO_CMDT(CMDT_RSP_ACK); + + dp->vdo_data = NULL; + dp->vdo_size = 1; + + schedule_work(&dp->work); + +out_unlock: + mutex_unlock(&dp->con->lock); + + return ret; +} + +/* + * We do not actually have access to the Status Update VDO, so we have to guess + * things. + */ +static int ucsi_displayport_status_update(struct ucsi_dp *dp) +{ + u32 cap = dp->alt->vdo; + + dp->data.status = DP_STATUS_ENABLED; + + /* + * If pin assignement D is supported, claiming always + * that Multi-function is preferred. + */ + if (DP_CAP_CAPABILITY(cap) & DP_CAP_UFP_D) { + dp->data.status |= DP_STATUS_CON_UFP_D; + + if (DP_CAP_UFP_D_PIN_ASSIGN(cap) & BIT(DP_PIN_ASSIGN_D)) + dp->data.status |= DP_STATUS_PREFER_MULTI_FUNC; + } else { + dp->data.status |= DP_STATUS_CON_DFP_D; + + if (DP_CAP_DFP_D_PIN_ASSIGN(cap) & BIT(DP_PIN_ASSIGN_D)) + dp->data.status |= DP_STATUS_PREFER_MULTI_FUNC; + } + + dp->vdo_data = &dp->data.status; + dp->vdo_size = 2; + + return 0; +} + +static int ucsi_displayport_configure(struct ucsi_dp *dp) +{ + u32 pins = DP_CONF_GET_PIN_ASSIGN(dp->data.conf); + struct ucsi_control ctrl; + + if (!dp->override) + return 0; + + ctrl.raw_cmd = UCSI_CMD_SET_NEW_CAM(dp->con->num, 1, dp->offset, pins); + + return ucsi_send_command(dp->con->ucsi, &ctrl, NULL, 0); +} + +static int ucsi_displayport_vdm(struct typec_altmode *alt, + u32 header, const u32 *data, int count) +{ + struct ucsi_dp *dp = typec_altmode_get_drvdata(alt); + int cmd_type = PD_VDO_CMDT(header); + int cmd = PD_VDO_CMD(header); + + mutex_lock(&dp->con->lock); + + if (!dp->override && dp->initialized) { + const struct typec_altmode *p = typec_altmode_get_partner(alt); + + dev_warn(&p->dev, + "firmware doesn't support alternate mode overriding\n"); + mutex_unlock(&dp->con->lock); + return -EOPNOTSUPP; + } + + switch (cmd_type) { + case CMDT_INIT: + dp->header = VDO(USB_TYPEC_DP_SID, 1, cmd); + dp->header |= VDO_OPOS(USB_TYPEC_DP_MODE); + + switch (cmd) { + case DP_CMD_STATUS_UPDATE: + if (ucsi_displayport_status_update(dp)) + dp->header |= VDO_CMDT(CMDT_RSP_NAK); + else + dp->header |= VDO_CMDT(CMDT_RSP_ACK); + break; + case DP_CMD_CONFIGURE: + dp->data.conf = *data; + if (ucsi_displayport_configure(dp)) { + dp->header |= VDO_CMDT(CMDT_RSP_NAK); + } else { + dp->header |= VDO_CMDT(CMDT_RSP_ACK); + if (dp->initialized) + ucsi_altmode_update_active(dp->con); + else + dp->initialized = true; + } + break; + default: + dp->header |= VDO_CMDT(CMDT_RSP_ACK); + break; + } + + schedule_work(&dp->work); + break; + default: + break; + } + + mutex_unlock(&dp->con->lock); + + return 0; +} + +static const struct typec_altmode_ops ucsi_displayport_ops = { + .enter = ucsi_displayport_enter, + .exit = ucsi_displayport_exit, + .vdm = ucsi_displayport_vdm, +}; + +static void ucsi_displayport_work(struct work_struct *work) +{ + struct ucsi_dp *dp = container_of(work, struct ucsi_dp, work); + int ret; + + mutex_lock(&dp->con->lock); + + ret = typec_altmode_vdm(dp->alt, dp->header, + dp->vdo_data, dp->vdo_size); + if (ret) + dev_err(&dp->alt->dev, "VDM 0x%x failed\n", dp->header); + + dp->vdo_data = NULL; + dp->vdo_size = 0; + dp->header = 0; + + mutex_unlock(&dp->con->lock); +} + +void ucsi_displayport_remove_partner(struct typec_altmode *alt) +{ + struct ucsi_dp *dp; + + if (!alt) + return; + + dp = typec_altmode_get_drvdata(alt); + dp->data.conf = 0; + dp->data.status = 0; + dp->initialized = false; +} + +struct typec_altmode *ucsi_register_displayport(struct ucsi_connector *con, + bool override, int offset, + struct typec_altmode_desc *desc) +{ + u8 all_assignments = BIT(DP_PIN_ASSIGN_C) | BIT(DP_PIN_ASSIGN_D) | + BIT(DP_PIN_ASSIGN_E); + struct typec_altmode *alt; + struct ucsi_dp *dp; + + /* We can't rely on the firmware with the capabilities. */ + desc->vdo |= DP_CAP_DP_SIGNALING | DP_CAP_RECEPTACLE; + + /* Claiming that we support all pin assignments */ + desc->vdo |= all_assignments << 8; + desc->vdo |= all_assignments << 16; + + alt = typec_port_register_altmode(con->port, desc); + if (IS_ERR(alt)) + return alt; + + dp = devm_kzalloc(&alt->dev, sizeof(*dp), GFP_KERNEL); + if (!dp) { + typec_unregister_altmode(alt); + return ERR_PTR(-ENOMEM); + } + + INIT_WORK(&dp->work, ucsi_displayport_work); + dp->override = override; + dp->offset = offset; + dp->con = con; + dp->alt = alt; + + alt->ops = &ucsi_displayport_ops; + typec_altmode_set_drvdata(alt, dp); + + return alt; +} diff --git a/drivers/usb/typec/ucsi/trace.c b/drivers/usb/typec/ucsi/trace.c index ffa3b4c3f338..1dabafb74320 100644 --- a/drivers/usb/typec/ucsi/trace.c +++ b/drivers/usb/typec/ucsi/trace.c @@ -60,3 +60,15 @@ const char *ucsi_cci_str(u32 cci) return ""; } + +static const char * const ucsi_recipient_strs[] = { + [UCSI_RECIPIENT_CON] = "port", + [UCSI_RECIPIENT_SOP] = "partner", + [UCSI_RECIPIENT_SOP_P] = "plug (prime)", + [UCSI_RECIPIENT_SOP_PP] = "plug (double prime)", +}; + +const char *ucsi_recipient_str(u8 recipient) +{ + return ucsi_recipient_strs[recipient]; +} diff --git a/drivers/usb/typec/ucsi/trace.h b/drivers/usb/typec/ucsi/trace.h index 5e2906df2db7..783ec9c72055 100644 --- a/drivers/usb/typec/ucsi/trace.h +++ b/drivers/usb/typec/ucsi/trace.h @@ -7,6 +7,7 @@ #define __UCSI_TRACE_H #include <linux/tracepoint.h> +#include <linux/usb/typec_altmode.h> const char *ucsi_cmd_str(u64 raw_cmd); const char *ucsi_ack_str(u8 ack); @@ -134,6 +135,31 @@ DEFINE_EVENT(ucsi_log_connector_status, ucsi_register_port, TP_ARGS(port, status) ); +DECLARE_EVENT_CLASS(ucsi_log_register_altmode, + TP_PROTO(u8 recipient, struct typec_altmode *alt), + TP_ARGS(recipient, alt), + TP_STRUCT__entry( + __field(u8, recipient) + __field(u16, svid) + __field(u8, mode) + __field(u32, vdo) + ), + TP_fast_assign( + __entry->recipient = recipient; + __entry->svid = alt->svid; + __entry->mode = alt->mode; + __entry->vdo = alt->vdo; + ), + TP_printk("%s alt mode: svid %04x, mode %d vdo %x", + ucsi_recipient_str(__entry->recipient), __entry->svid, + __entry->mode, __entry->vdo) +); + +DEFINE_EVENT(ucsi_log_register_altmode, ucsi_register_altmode, + TP_PROTO(u8 recipient, struct typec_altmode *alt), + TP_ARGS(recipient, alt) +); + #endif /* __UCSI_TRACE_H */ /* This part must be outside protection */ diff --git a/drivers/usb/typec/ucsi/ucsi.c b/drivers/usb/typec/ucsi/ucsi.c index 8d0a6fe748bd..7850b851cecd 100644 --- a/drivers/usb/typec/ucsi/ucsi.c +++ b/drivers/usb/typec/ucsi/ucsi.c @@ -12,7 +12,7 @@ #include <linux/module.h> #include <linux/delay.h> #include <linux/slab.h> -#include <linux/usb/typec.h> +#include <linux/usb/typec_dp.h> #include "ucsi.h" #include "trace.h" @@ -39,49 +39,6 @@ */ #define UCSI_SWAP_TIMEOUT_MS 5000 -enum ucsi_status { - UCSI_IDLE = 0, - UCSI_BUSY, - UCSI_ERROR, -}; - -struct ucsi_connector { - int num; - - struct ucsi *ucsi; - struct work_struct work; - struct completion complete; - - struct typec_port *port; - struct typec_partner *partner; - - struct typec_capability typec_cap; - - struct ucsi_connector_status status; - struct ucsi_connector_capability cap; -}; - -struct ucsi { - struct device *dev; - struct ucsi_ppm *ppm; - - enum ucsi_status status; - struct completion complete; - struct ucsi_capability cap; - struct ucsi_connector *connector; - - struct work_struct work; - - /* PPM Communication lock */ - struct mutex ppm_lock; - - /* PPM communication flags */ - unsigned long flags; -#define EVENT_PENDING 0 -#define COMMAND_PENDING 1 -#define ACK_PENDING 2 -}; - static inline int ucsi_sync(struct ucsi *ucsi) { if (ucsi->ppm && ucsi->ppm->sync) @@ -238,8 +195,226 @@ err: return ret; } +int ucsi_send_command(struct ucsi *ucsi, struct ucsi_control *ctrl, + void *retval, size_t size) +{ + int ret; + + mutex_lock(&ucsi->ppm_lock); + ret = ucsi_run_command(ucsi, ctrl, retval, size); + mutex_unlock(&ucsi->ppm_lock); + + return ret; +} + /* -------------------------------------------------------------------------- */ +void ucsi_altmode_update_active(struct ucsi_connector *con) +{ + const struct typec_altmode *altmode = NULL; + struct ucsi_control ctrl; + int ret; + u8 cur; + int i; + + UCSI_CMD_GET_CURRENT_CAM(ctrl, con->num); + ret = ucsi_run_command(con->ucsi, &ctrl, &cur, sizeof(cur)); + if (ret < 0) { + if (con->ucsi->ppm->data->version > 0x0100) { + dev_err(con->ucsi->dev, + "GET_CURRENT_CAM command failed\n"); + return; + } + cur = 0xff; + } + + if (cur < UCSI_MAX_ALTMODES) + altmode = typec_altmode_get_partner(con->port_altmode[cur]); + + for (i = 0; con->partner_altmode[i]; i++) + typec_altmode_update_active(con->partner_altmode[i], + con->partner_altmode[i] == altmode); +} + +static u8 ucsi_altmode_next_mode(struct typec_altmode **alt, u16 svid) +{ + u8 mode = 1; + int i; + + for (i = 0; alt[i]; i++) + if (alt[i]->svid == svid) + mode++; + + return mode; +} + +static int ucsi_next_altmode(struct typec_altmode **alt) +{ + int i = 0; + + for (i = 0; i < UCSI_MAX_ALTMODES; i++) + if (!alt[i]) + return i; + + return -ENOENT; +} + +static int ucsi_register_altmode(struct ucsi_connector *con, + struct typec_altmode_desc *desc, + u8 recipient) +{ + struct typec_altmode *alt; + bool override; + int ret; + int i; + + override = !!(con->ucsi->cap.features & UCSI_CAP_ALT_MODE_OVERRIDE); + + switch (recipient) { + case UCSI_RECIPIENT_CON: + i = ucsi_next_altmode(con->port_altmode); + if (i < 0) { + ret = i; + goto err; + } + + desc->mode = ucsi_altmode_next_mode(con->port_altmode, + desc->svid); + + switch (desc->svid) { + case USB_TYPEC_DP_SID: + case USB_TYPEC_NVIDIA_VLINK_SID: + alt = ucsi_register_displayport(con, override, i, desc); + break; + default: + alt = typec_port_register_altmode(con->port, desc); + break; + } + + if (IS_ERR(alt)) { + ret = PTR_ERR(alt); + goto err; + } + + con->port_altmode[i] = alt; + break; + case UCSI_RECIPIENT_SOP: + i = ucsi_next_altmode(con->partner_altmode); + if (i < 0) { + ret = i; + goto err; + } + + desc->mode = ucsi_altmode_next_mode(con->partner_altmode, + desc->svid); + + alt = typec_partner_register_altmode(con->partner, desc); + if (IS_ERR(alt)) { + ret = PTR_ERR(alt); + goto err; + } + + con->partner_altmode[i] = alt; + break; + default: + return -EINVAL; + } + + trace_ucsi_register_altmode(recipient, alt); + + return 0; + +err: + dev_err(con->ucsi->dev, "failed to registers svid 0x%04x mode %d\n", + desc->svid, desc->mode); + + return ret; +} + +static int ucsi_register_altmodes(struct ucsi_connector *con, u8 recipient) +{ + int max_altmodes = UCSI_MAX_ALTMODES; + struct typec_altmode_desc desc; + struct ucsi_altmode alt[2]; + struct ucsi_control ctrl; + int num = 1; + int ret; + int len; + int j; + int i; + + if (!(con->ucsi->cap.features & UCSI_CAP_ALT_MODE_DETAILS)) + return 0; + + if (recipient == UCSI_RECIPIENT_SOP && con->partner_altmode[0]) + return 0; + + if (recipient == UCSI_RECIPIENT_CON) + max_altmodes = con->ucsi->cap.num_alt_modes; + + for (i = 0; i < max_altmodes;) { + memset(alt, 0, sizeof(alt)); + UCSI_CMD_GET_ALTERNATE_MODES(ctrl, recipient, con->num, i, 1); + len = ucsi_run_command(con->ucsi, &ctrl, alt, sizeof(alt)); + if (len <= 0) + return len; + + /* + * This code is requesting one alt mode at a time, but some PPMs + * may still return two. If that happens both alt modes need be + * registered and the offset for the next alt mode has to be + * incremented. + */ + num = len / sizeof(alt[0]); + i += num; + + for (j = 0; j < num; j++) { + if (!alt[j].svid) + return 0; + + memset(&desc, 0, sizeof(desc)); + desc.vdo = alt[j].mid; + desc.svid = alt[j].svid; + desc.roles = TYPEC_PORT_DRD; + + ret = ucsi_register_altmode(con, &desc, recipient); + if (ret) + return ret; + } + } + + return 0; +} + +static void ucsi_unregister_altmodes(struct ucsi_connector *con, u8 recipient) +{ + const struct typec_altmode *pdev; + struct typec_altmode **adev; + int i = 0; + + switch (recipient) { + case UCSI_RECIPIENT_CON: + adev = con->port_altmode; + break; + case UCSI_RECIPIENT_SOP: + adev = con->partner_altmode; + break; + default: + return; + } + + while (adev[i]) { + if (recipient == UCSI_RECIPIENT_SOP && + (adev[i]->svid == USB_TYPEC_DP_SID || + adev[i]->svid == USB_TYPEC_NVIDIA_VLINK_SID)) { + pdev = typec_altmode_get_partner(adev[i]); + ucsi_displayport_remove_partner((void *)pdev); + } + typec_unregister_altmode(adev[i]); + adev[i++] = NULL; + } +} + static void ucsi_pwr_opmode_change(struct ucsi_connector *con) { switch (con->status.pwr_op_mode) { @@ -299,10 +474,43 @@ static void ucsi_unregister_partner(struct ucsi_connector *con) if (!con->partner) return; + ucsi_unregister_altmodes(con, UCSI_RECIPIENT_SOP); typec_unregister_partner(con->partner); con->partner = NULL; } +static void ucsi_partner_change(struct ucsi_connector *con) +{ + int ret; + + if (!con->partner) + return; + + switch (con->status.partner_type) { + case UCSI_CONSTAT_PARTNER_TYPE_UFP: + typec_set_data_role(con->port, TYPEC_HOST); + break; + case UCSI_CONSTAT_PARTNER_TYPE_DFP: + typec_set_data_role(con->port, TYPEC_DEVICE); + break; + default: + break; + } + + /* Complete pending data role swap */ + if (!completion_done(&con->complete)) + complete(&con->complete); + + /* Can't rely on Partner Flags field. Always checking the alt modes. */ + ret = ucsi_register_altmodes(con, UCSI_RECIPIENT_SOP); + if (ret) + dev_err(con->ucsi->dev, + "con%d: failed to register partner alternate modes\n", + con->num); + else + ucsi_altmode_update_active(con); +} + static void ucsi_connector_change(struct work_struct *work) { struct ucsi_connector *con = container_of(work, struct ucsi_connector, @@ -311,10 +519,10 @@ static void ucsi_connector_change(struct work_struct *work) struct ucsi_control ctrl; int ret; - mutex_lock(&ucsi->ppm_lock); + mutex_lock(&con->lock); UCSI_CMD_GET_CONNECTOR_STATUS(ctrl, con->num); - ret = ucsi_run_command(ucsi, &ctrl, &con->status, sizeof(con->status)); + ret = ucsi_send_command(ucsi, &ctrl, &con->status, sizeof(con->status)); if (ret < 0) { dev_err(ucsi->dev, "%s: GET_CONNECTOR_STATUS failed (%d)\n", __func__, ret); @@ -332,23 +540,6 @@ static void ucsi_connector_change(struct work_struct *work) complete(&con->complete); } - if (con->status.change & UCSI_CONSTAT_PARTNER_CHANGE) { - switch (con->status.partner_type) { - case UCSI_CONSTAT_PARTNER_TYPE_UFP: - typec_set_data_role(con->port, TYPEC_HOST); - break; - case UCSI_CONSTAT_PARTNER_TYPE_DFP: - typec_set_data_role(con->port, TYPEC_DEVICE); - break; - default: - break; - } - - /* Complete pending data role swap */ - if (!completion_done(&con->complete)) - complete(&con->complete); - } - if (con->status.change & UCSI_CONSTAT_CONNECT_CHANGE) { typec_set_pwr_role(con->port, con->status.pwr_dir); @@ -369,6 +560,19 @@ static void ucsi_connector_change(struct work_struct *work) ucsi_unregister_partner(con); } + if (con->status.change & UCSI_CONSTAT_CAM_CHANGE) { + /* + * We don't need to know the currently supported alt modes here. + * Running GET_CAM_SUPPORTED command just to make sure the PPM + * does not get stuck in case it assumes we do so. + */ + UCSI_CMD_GET_CAM_SUPPORTED(ctrl, con->num); + ucsi_run_command(con->ucsi, &ctrl, NULL, 0); + } + + if (con->status.change & UCSI_CONSTAT_PARTNER_CHANGE) + ucsi_partner_change(con); + ret = ucsi_ack(ucsi, UCSI_ACK_EVENT); if (ret) dev_err(ucsi->dev, "%s: ACK failed (%d)", __func__, ret); @@ -377,7 +581,7 @@ static void ucsi_connector_change(struct work_struct *work) out_unlock: clear_bit(EVENT_PENDING, &ucsi->flags); - mutex_unlock(&ucsi->ppm_lock); + mutex_unlock(&con->lock); } /** @@ -427,7 +631,7 @@ static int ucsi_reset_connector(struct ucsi_connector *con, bool hard) UCSI_CMD_CONNECTOR_RESET(ctrl, con, hard); - return ucsi_run_command(con->ucsi, &ctrl, NULL, 0); + return ucsi_send_command(con->ucsi, &ctrl, NULL, 0); } static int ucsi_reset_ppm(struct ucsi *ucsi) @@ -481,15 +685,17 @@ static int ucsi_role_cmd(struct ucsi_connector *con, struct ucsi_control *ctrl) { int ret; - ret = ucsi_run_command(con->ucsi, ctrl, NULL, 0); + ret = ucsi_send_command(con->ucsi, ctrl, NULL, 0); if (ret == -ETIMEDOUT) { struct ucsi_control c; /* PPM most likely stopped responding. Resetting everything. */ + mutex_lock(&con->ucsi->ppm_lock); ucsi_reset_ppm(con->ucsi); + mutex_unlock(&con->ucsi->ppm_lock); UCSI_CMD_SET_NTFY_ENABLE(c, UCSI_ENABLE_NTFY_ALL); - ucsi_run_command(con->ucsi, &c, NULL, 0); + ucsi_send_command(con->ucsi, &c, NULL, 0); ucsi_reset_connector(con, true); } @@ -504,10 +710,12 @@ ucsi_dr_swap(const struct typec_capability *cap, enum typec_data_role role) struct ucsi_control ctrl; int ret = 0; - if (!con->partner) - return -ENOTCONN; + mutex_lock(&con->lock); - mutex_lock(&con->ucsi->ppm_lock); + if (!con->partner) { + ret = -ENOTCONN; + goto out_unlock; + } if ((con->status.partner_type == UCSI_CONSTAT_PARTNER_TYPE_DFP && role == TYPEC_DEVICE) || @@ -520,18 +728,14 @@ ucsi_dr_swap(const struct typec_capability *cap, enum typec_data_role role) if (ret < 0) goto out_unlock; - mutex_unlock(&con->ucsi->ppm_lock); - if (!wait_for_completion_timeout(&con->complete, msecs_to_jiffies(UCSI_SWAP_TIMEOUT_MS))) - return -ETIMEDOUT; - - return 0; + ret = -ETIMEDOUT; out_unlock: - mutex_unlock(&con->ucsi->ppm_lock); + mutex_unlock(&con->lock); - return ret; + return ret < 0 ? ret : 0; } static int @@ -541,10 +745,12 @@ ucsi_pr_swap(const struct typec_capability *cap, enum typec_role role) struct ucsi_control ctrl; int ret = 0; - if (!con->partner) - return -ENOTCONN; + mutex_lock(&con->lock); - mutex_lock(&con->ucsi->ppm_lock); + if (!con->partner) { + ret = -ENOTCONN; + goto out_unlock; + } if (con->status.pwr_dir == role) goto out_unlock; @@ -554,13 +760,11 @@ ucsi_pr_swap(const struct typec_capability *cap, enum typec_role role) if (ret < 0) goto out_unlock; - mutex_unlock(&con->ucsi->ppm_lock); - if (!wait_for_completion_timeout(&con->complete, - msecs_to_jiffies(UCSI_SWAP_TIMEOUT_MS))) - return -ETIMEDOUT; - - mutex_lock(&con->ucsi->ppm_lock); + msecs_to_jiffies(UCSI_SWAP_TIMEOUT_MS))) { + ret = -ETIMEDOUT; + goto out_unlock; + } /* Something has gone wrong while swapping the role */ if (con->status.pwr_op_mode != UCSI_CONSTAT_PWR_OPMODE_PD) { @@ -569,7 +773,7 @@ ucsi_pr_swap(const struct typec_capability *cap, enum typec_role role) } out_unlock: - mutex_unlock(&con->ucsi->ppm_lock); + mutex_unlock(&con->lock); return ret; } @@ -595,6 +799,7 @@ static int ucsi_register_port(struct ucsi *ucsi, int index) INIT_WORK(&con->work, ucsi_connector_change); init_completion(&con->complete); + mutex_init(&con->lock); con->num = index + 1; con->ucsi = ucsi; @@ -636,6 +841,12 @@ static int ucsi_register_port(struct ucsi *ucsi, int index) if (IS_ERR(con->port)) return PTR_ERR(con->port); + /* Alternate modes */ + ret = ucsi_register_altmodes(con, UCSI_RECIPIENT_CON); + if (ret) + dev_err(ucsi->dev, "con%d: failed to register alt modes\n", + con->num); + /* Get the status */ UCSI_CMD_GET_CONNECTOR_STATUS(ctrl, con->num); ret = ucsi_run_command(ucsi, &ctrl, &con->status, sizeof(con->status)); @@ -662,6 +873,16 @@ static int ucsi_register_port(struct ucsi *ucsi, int index) if (con->status.connected) ucsi_register_partner(con); + if (con->partner) { + ret = ucsi_register_altmodes(con, UCSI_RECIPIENT_SOP); + if (ret) + dev_err(ucsi->dev, + "con%d: failed to register alternate modes\n", + con->num); + else + ucsi_altmode_update_active(con); + } + trace_ucsi_register_port(con->num, &con->status); return 0; @@ -730,6 +951,7 @@ static void ucsi_init(struct work_struct *work) err_unregister: for (con = ucsi->connector; con->port; con++) { ucsi_unregister_partner(con); + ucsi_unregister_altmodes(con, UCSI_RECIPIENT_CON); typec_unregister_port(con->port); con->port = NULL; } @@ -788,17 +1010,15 @@ void ucsi_unregister_ppm(struct ucsi *ucsi) /* Make sure that we are not in the middle of driver initialization */ cancel_work_sync(&ucsi->work); - mutex_lock(&ucsi->ppm_lock); - /* Disable everything except command complete notification */ UCSI_CMD_SET_NTFY_ENABLE(ctrl, UCSI_ENABLE_NTFY_CMD_COMPLETE) - ucsi_run_command(ucsi, &ctrl, NULL, 0); - - mutex_unlock(&ucsi->ppm_lock); + ucsi_send_command(ucsi, &ctrl, NULL, 0); for (i = 0; i < ucsi->cap.num_connectors; i++) { cancel_work_sync(&ucsi->connector[i].work); ucsi_unregister_partner(&ucsi->connector[i]); + ucsi_unregister_altmodes(&ucsi->connector[i], + UCSI_RECIPIENT_CON); typec_unregister_port(ucsi->connector[i].port); } diff --git a/drivers/usb/typec/ucsi/ucsi.h b/drivers/usb/typec/ucsi/ucsi.h index 53b80f40a908..1e2981aef629 100644 --- a/drivers/usb/typec/ucsi/ucsi.h +++ b/drivers/usb/typec/ucsi/ucsi.h @@ -6,6 +6,7 @@ #include <linux/bitops.h> #include <linux/device.h> #include <linux/types.h> +#include <linux/usb/typec.h> /* -------------------------------------------------------------------------- */ @@ -60,6 +61,20 @@ struct ucsi_uor_cmd { u16:6; /* reserved */ } __packed; +/* Get Alternate Modes Command structure */ +struct ucsi_altmode_cmd { + u8 cmd; + u8 length; + u8 recipient; +#define UCSI_RECIPIENT_CON 0 +#define UCSI_RECIPIENT_SOP 1 +#define UCSI_RECIPIENT_SOP_P 2 +#define UCSI_RECIPIENT_SOP_PP 3 + u8 con_num; + u8 offset; + u8 num_altmodes; +} __packed; + struct ucsi_control { union { u64 raw_cmd; @@ -67,6 +82,7 @@ struct ucsi_control { struct ucsi_uor_cmd uor; struct ucsi_ack_cmd ack; struct ucsi_con_rst con_rst; + struct ucsi_altmode_cmd alt; }; }; @@ -112,6 +128,30 @@ struct ucsi_control { (_ctrl_).cmd.data = _con_; \ } +/* Helper for preparing ucsi_control for GET_ALTERNATE_MODES command. */ +#define UCSI_CMD_GET_ALTERNATE_MODES(_ctrl_, _r_, _con_num_, _o_, _num_)\ +{ \ + __UCSI_CMD((_ctrl_), UCSI_GET_ALTERNATE_MODES) \ + _ctrl_.alt.recipient = (_r_); \ + _ctrl_.alt.con_num = (_con_num_); \ + _ctrl_.alt.offset = (_o_); \ + _ctrl_.alt.num_altmodes = (_num_) - 1; \ +} + +/* Helper for preparing ucsi_control for GET_CAM_SUPPORTED command. */ +#define UCSI_CMD_GET_CAM_SUPPORTED(_ctrl_, _con_) \ +{ \ + __UCSI_CMD((_ctrl_), UCSI_GET_CAM_SUPPORTED) \ + _ctrl_.cmd.data = (_con_); \ +} + +/* Helper for preparing ucsi_control for GET_CAM_SUPPORTED command. */ +#define UCSI_CMD_GET_CURRENT_CAM(_ctrl_, _con_) \ +{ \ + __UCSI_CMD((_ctrl_), UCSI_GET_CURRENT_CAM) \ + _ctrl_.cmd.data = (_con_); \ +} + /* Helper for preparing ucsi_control for GET_CONNECTOR_STATUS command. */ #define UCSI_CMD_GET_CONNECTOR_STATUS(_ctrl_, _con_) \ { \ @@ -334,4 +374,82 @@ struct ucsi *ucsi_register_ppm(struct device *dev, struct ucsi_ppm *ppm); void ucsi_unregister_ppm(struct ucsi *ucsi); void ucsi_notify(struct ucsi *ucsi); +/* -------------------------------------------------------------------------- */ + +enum ucsi_status { + UCSI_IDLE = 0, + UCSI_BUSY, + UCSI_ERROR, +}; + +struct ucsi { + struct device *dev; + struct ucsi_ppm *ppm; + + enum ucsi_status status; + struct completion complete; + struct ucsi_capability cap; + struct ucsi_connector *connector; + + struct work_struct work; + + /* PPM Communication lock */ + struct mutex ppm_lock; + + /* PPM communication flags */ + unsigned long flags; +#define EVENT_PENDING 0 +#define COMMAND_PENDING 1 +#define ACK_PENDING 2 +}; + +#define UCSI_MAX_SVID 5 +#define UCSI_MAX_ALTMODES (UCSI_MAX_SVID * 6) + +struct ucsi_connector { + int num; + + struct ucsi *ucsi; + struct mutex lock; /* port lock */ + struct work_struct work; + struct completion complete; + + struct typec_port *port; + struct typec_partner *partner; + + struct typec_altmode *port_altmode[UCSI_MAX_ALTMODES]; + struct typec_altmode *partner_altmode[UCSI_MAX_ALTMODES]; + + struct typec_capability typec_cap; + + struct ucsi_connector_status status; + struct ucsi_connector_capability cap; +}; + +int ucsi_send_command(struct ucsi *ucsi, struct ucsi_control *ctrl, + void *retval, size_t size); + +void ucsi_altmode_update_active(struct ucsi_connector *con); + +#if IS_ENABLED(CONFIG_TYPEC_DP_ALTMODE) +struct typec_altmode * +ucsi_register_displayport(struct ucsi_connector *con, + bool override, int offset, + struct typec_altmode_desc *desc); + +void ucsi_displayport_remove_partner(struct typec_altmode *adev); + +#else +static inline struct typec_altmode * +ucsi_register_displayport(struct ucsi_connector *con, + bool override, int offset, + struct typec_altmode_desc *desc) +{ + return NULL; +} + +static inline void +ucsi_displayport_remove_partner(struct typec_altmode *adev) { } +#endif /* CONFIG_TYPEC_DP_ALTMODE */ + #endif /* __DRIVER_USB_TYPEC_UCSI_H */ diff --git a/drivers/usb/typec/ucsi/ucsi_ccg.c b/drivers/usb/typec/ucsi/ucsi_ccg.c index de8a43bdff68..9d46aa9e4e35 100644 --- a/drivers/usb/typec/ucsi/ucsi_ccg.c +++ b/drivers/usb/typec/ucsi/ucsi_ccg.c @@ -9,6 +9,7 @@ */ #include <linux/acpi.h> #include <linux/delay.h> +#include <linux/firmware.h> #include <linux/i2c.h> #include <linux/module.h> #include <linux/pci.h> @@ -17,18 +18,172 @@ #include <asm/unaligned.h> #include "ucsi.h" +enum enum_fw_mode { + BOOT, /* bootloader */ + FW1, /* FW partition-1 (contains secondary fw) */ + FW2, /* FW partition-2 (contains primary fw) */ + FW_INVALID, +}; + +#define CCGX_RAB_DEVICE_MODE 0x0000 +#define CCGX_RAB_INTR_REG 0x0006 +#define DEV_INT BIT(0) +#define PORT0_INT BIT(1) +#define PORT1_INT BIT(2) +#define UCSI_READ_INT BIT(7) +#define CCGX_RAB_JUMP_TO_BOOT 0x0007 +#define TO_BOOT 'J' +#define TO_ALT_FW 'A' +#define CCGX_RAB_RESET_REQ 0x0008 +#define RESET_SIG 'R' +#define CMD_RESET_I2C 0x0 +#define CMD_RESET_DEV 0x1 +#define CCGX_RAB_ENTER_FLASHING 0x000A +#define FLASH_ENTER_SIG 'P' +#define CCGX_RAB_VALIDATE_FW 0x000B +#define CCGX_RAB_FLASH_ROW_RW 0x000C +#define FLASH_SIG 'F' +#define FLASH_RD_CMD 0x0 +#define FLASH_WR_CMD 0x1 +#define FLASH_FWCT1_WR_CMD 0x2 +#define FLASH_FWCT2_WR_CMD 0x3 +#define FLASH_FWCT_SIG_WR_CMD 0x4 +#define CCGX_RAB_READ_ALL_VER 0x0010 +#define CCGX_RAB_READ_FW2_VER 0x0020 +#define CCGX_RAB_UCSI_CONTROL 0x0039 +#define CCGX_RAB_UCSI_CONTROL_START BIT(0) +#define CCGX_RAB_UCSI_CONTROL_STOP BIT(1) +#define CCGX_RAB_UCSI_DATA_BLOCK(offset) (0xf000 | ((offset) & 0xff)) +#define REG_FLASH_RW_MEM 0x0200 +#define DEV_REG_IDX CCGX_RAB_DEVICE_MODE +#define CCGX_RAB_PDPORT_ENABLE 0x002C +#define PDPORT_1 BIT(0) +#define PDPORT_2 BIT(1) +#define CCGX_RAB_RESPONSE 0x007E +#define ASYNC_EVENT BIT(7) + +/* CCGx events & async msg codes */ +#define RESET_COMPLETE 0x80 +#define EVENT_INDEX RESET_COMPLETE +#define PORT_CONNECT_DET 0x84 +#define PORT_DISCONNECT_DET 0x85 +#define ROLE_SWAP_COMPELETE 0x87 + +/* ccg firmware */ +#define CYACD_LINE_SIZE 527 +#define CCG4_ROW_SIZE 256 +#define FW1_METADATA_ROW 0x1FF +#define FW2_METADATA_ROW 0x1FE +#define FW_CFG_TABLE_SIG_SIZE 256 + +static int secondary_fw_min_ver = 41; + +enum enum_flash_mode { + SECONDARY_BL, /* update secondary using bootloader */ + PRIMARY, /* update primary using secondary */ + SECONDARY, /* update secondary using primary */ + FLASH_NOT_NEEDED, /* update not required */ + FLASH_INVALID, +}; + +static const char * const ccg_fw_names[] = { + "ccg_boot.cyacd", + "ccg_primary.cyacd", + "ccg_secondary.cyacd" +}; + +struct ccg_dev_info { +#define CCG_DEVINFO_FWMODE_SHIFT (0) +#define CCG_DEVINFO_FWMODE_MASK (0x3 << CCG_DEVINFO_FWMODE_SHIFT) +#define CCG_DEVINFO_PDPORTS_SHIFT (2) +#define CCG_DEVINFO_PDPORTS_MASK (0x3 << CCG_DEVINFO_PDPORTS_SHIFT) + u8 mode; + u8 bl_mode; + __le16 silicon_id; + __le16 bl_last_row; +} __packed; + +struct version_format { + __le16 build; + u8 patch; + u8 ver; +#define CCG_VERSION_MIN_SHIFT (0) +#define CCG_VERSION_MIN_MASK (0xf << CCG_VERSION_MIN_SHIFT) +#define CCG_VERSION_MAJ_SHIFT (4) +#define CCG_VERSION_MAJ_MASK (0xf << CCG_VERSION_MAJ_SHIFT) +} __packed; + +struct version_info { + struct version_format base; + struct version_format app; +}; + +struct fw_config_table { + u32 identity; + u16 table_size; + u8 fwct_version; + u8 is_key_change; + u8 guid[16]; + struct version_format base; + struct version_format app; + u8 primary_fw_digest[32]; + u32 key_exp_length; + u8 key_modulus[256]; + u8 key_exp[4]; +}; + +/* CCGx response codes */ +enum ccg_resp_code { + CMD_NO_RESP = 0x00, + CMD_SUCCESS = 0x02, + FLASH_DATA_AVAILABLE = 0x03, + CMD_INVALID = 0x05, + FLASH_UPDATE_FAIL = 0x07, + INVALID_FW = 0x08, + INVALID_ARG = 0x09, + CMD_NOT_SUPPORT = 0x0A, + TRANSACTION_FAIL = 0x0C, + PD_CMD_FAIL = 0x0D, + UNDEF_ERROR = 0x0F, + INVALID_RESP = 0x10, +}; + +#define CCG_EVENT_MAX (EVENT_INDEX + 43) + +struct ccg_cmd { + u16 reg; + u32 data; + int len; + u32 delay; /* ms delay for cmd timeout */ +}; + +struct ccg_resp { + u8 code; + u8 length; +}; + struct ucsi_ccg { struct device *dev; struct ucsi *ucsi; struct ucsi_ppm ppm; struct i2c_client *client; -}; + struct ccg_dev_info info; + /* version info for boot, primary and secondary */ + struct version_info version[FW2 + 1]; + /* CCG HPI communication flags */ + unsigned long flags; +#define RESET_PENDING 0 +#define DEV_CMD_PENDING 1 + struct ccg_resp dev_resp; + u8 cmd_resp; + int port_num; + int irq; + struct work_struct work; + struct mutex lock; /* to sync between user and driver thread */ -#define CCGX_RAB_INTR_REG 0x06 -#define CCGX_RAB_UCSI_CONTROL 0x39 -#define CCGX_RAB_UCSI_CONTROL_START BIT(0) -#define CCGX_RAB_UCSI_CONTROL_STOP BIT(1) -#define CCGX_RAB_UCSI_DATA_BLOCK(offset) (0xf000 | ((offset) & 0xff)) + /* fw build with vendor information */ + u16 fw_build; +}; static int ccg_read(struct ucsi_ccg *uc, u16 rab, u8 *data, u32 len) { @@ -220,6 +375,687 @@ static irqreturn_t ccg_irq_handler(int irq, void *data) return IRQ_HANDLED; } +static int get_fw_info(struct ucsi_ccg *uc) +{ + int err; + + err = ccg_read(uc, CCGX_RAB_READ_ALL_VER, (u8 *)(&uc->version), + sizeof(uc->version)); + if (err < 0) + return err; + + err = ccg_read(uc, CCGX_RAB_DEVICE_MODE, (u8 *)(&uc->info), + sizeof(uc->info)); + if (err < 0) + return err; + + return 0; +} + +static inline bool invalid_async_evt(int code) +{ + return (code >= CCG_EVENT_MAX) || (code < EVENT_INDEX); +} + +static void ccg_process_response(struct ucsi_ccg *uc) +{ + struct device *dev = uc->dev; + + if (uc->dev_resp.code & ASYNC_EVENT) { + if (uc->dev_resp.code == RESET_COMPLETE) { + if (test_bit(RESET_PENDING, &uc->flags)) + uc->cmd_resp = uc->dev_resp.code; + get_fw_info(uc); + } + if (invalid_async_evt(uc->dev_resp.code)) + dev_err(dev, "invalid async evt %d\n", + uc->dev_resp.code); + } else { + if (test_bit(DEV_CMD_PENDING, &uc->flags)) { + uc->cmd_resp = uc->dev_resp.code; + clear_bit(DEV_CMD_PENDING, &uc->flags); + } else { + dev_err(dev, "dev resp 0x%04x but no cmd pending\n", + uc->dev_resp.code); + } + } +} + +static int ccg_read_response(struct ucsi_ccg *uc) +{ + unsigned long target = jiffies + msecs_to_jiffies(1000); + struct device *dev = uc->dev; + u8 intval; + int status; + + /* wait for interrupt status to get updated */ + do { + status = ccg_read(uc, CCGX_RAB_INTR_REG, &intval, + sizeof(intval)); + if (status < 0) + return status; + + if (intval & DEV_INT) + break; + usleep_range(500, 600); + } while (time_is_after_jiffies(target)); + + if (time_is_before_jiffies(target)) { + dev_err(dev, "response timeout error\n"); + return -ETIME; + } + + status = ccg_read(uc, CCGX_RAB_RESPONSE, (u8 *)&uc->dev_resp, + sizeof(uc->dev_resp)); + if (status < 0) + return status; + + status = ccg_write(uc, CCGX_RAB_INTR_REG, &intval, sizeof(intval)); + if (status < 0) + return status; + + return 0; +} + +/* Caller must hold uc->lock */ +static int ccg_send_command(struct ucsi_ccg *uc, struct ccg_cmd *cmd) +{ + struct device *dev = uc->dev; + int ret; + + switch (cmd->reg & 0xF000) { + case DEV_REG_IDX: + set_bit(DEV_CMD_PENDING, &uc->flags); + break; + default: + dev_err(dev, "invalid cmd register\n"); + break; + } + + ret = ccg_write(uc, cmd->reg, (u8 *)&cmd->data, cmd->len); + if (ret < 0) + return ret; + + msleep(cmd->delay); + + ret = ccg_read_response(uc); + if (ret < 0) { + dev_err(dev, "response read error\n"); + switch (cmd->reg & 0xF000) { + case DEV_REG_IDX: + clear_bit(DEV_CMD_PENDING, &uc->flags); + break; + default: + dev_err(dev, "invalid cmd register\n"); + break; + } + return -EIO; + } + ccg_process_response(uc); + + return uc->cmd_resp; +} + +static int ccg_cmd_enter_flashing(struct ucsi_ccg *uc) +{ + struct ccg_cmd cmd; + int ret; + + cmd.reg = CCGX_RAB_ENTER_FLASHING; + cmd.data = FLASH_ENTER_SIG; + cmd.len = 1; + cmd.delay = 50; + + mutex_lock(&uc->lock); + + ret = ccg_send_command(uc, &cmd); + + mutex_unlock(&uc->lock); + + if (ret != CMD_SUCCESS) { + dev_err(uc->dev, "enter flashing failed ret=%d\n", ret); + return ret; + } + + return 0; +} + +static int ccg_cmd_reset(struct ucsi_ccg *uc) +{ + struct ccg_cmd cmd; + u8 *p; + int ret; + + p = (u8 *)&cmd.data; + cmd.reg = CCGX_RAB_RESET_REQ; + p[0] = RESET_SIG; + p[1] = CMD_RESET_DEV; + cmd.len = 2; + cmd.delay = 5000; + + mutex_lock(&uc->lock); + + set_bit(RESET_PENDING, &uc->flags); + + ret = ccg_send_command(uc, &cmd); + if (ret != RESET_COMPLETE) + goto err_clear_flag; + + ret = 0; + +err_clear_flag: + clear_bit(RESET_PENDING, &uc->flags); + + mutex_unlock(&uc->lock); + + return ret; +} + +static int ccg_cmd_port_control(struct ucsi_ccg *uc, bool enable) +{ + struct ccg_cmd cmd; + int ret; + + cmd.reg = CCGX_RAB_PDPORT_ENABLE; + if (enable) + cmd.data = (uc->port_num == 1) ? + PDPORT_1 : (PDPORT_1 | PDPORT_2); + else + cmd.data = 0x0; + cmd.len = 1; + cmd.delay = 10; + + mutex_lock(&uc->lock); + + ret = ccg_send_command(uc, &cmd); + + mutex_unlock(&uc->lock); + + if (ret != CMD_SUCCESS) { + dev_err(uc->dev, "port control failed ret=%d\n", ret); + return ret; + } + return 0; +} + +static int ccg_cmd_jump_boot_mode(struct ucsi_ccg *uc, int bl_mode) +{ + struct ccg_cmd cmd; + int ret; + + cmd.reg = CCGX_RAB_JUMP_TO_BOOT; + + if (bl_mode) + cmd.data = TO_BOOT; + else + cmd.data = TO_ALT_FW; + + cmd.len = 1; + cmd.delay = 100; + + mutex_lock(&uc->lock); + + set_bit(RESET_PENDING, &uc->flags); + + ret = ccg_send_command(uc, &cmd); + if (ret != RESET_COMPLETE) + goto err_clear_flag; + + ret = 0; + +err_clear_flag: + clear_bit(RESET_PENDING, &uc->flags); + + mutex_unlock(&uc->lock); + + return ret; +} + +static int +ccg_cmd_write_flash_row(struct ucsi_ccg *uc, u16 row, + const void *data, u8 fcmd) +{ + struct i2c_client *client = uc->client; + struct ccg_cmd cmd; + u8 buf[CCG4_ROW_SIZE + 2]; + u8 *p; + int ret; + + /* Copy the data into the flash read/write memory. */ + put_unaligned_le16(REG_FLASH_RW_MEM, buf); + + memcpy(buf + 2, data, CCG4_ROW_SIZE); + + mutex_lock(&uc->lock); + + ret = i2c_master_send(client, buf, CCG4_ROW_SIZE + 2); + if (ret != CCG4_ROW_SIZE + 2) { + dev_err(uc->dev, "REG_FLASH_RW_MEM write fail %d\n", ret); + mutex_unlock(&uc->lock); + return ret < 0 ? ret : -EIO; + } + + /* Use the FLASH_ROW_READ_WRITE register to trigger */ + /* writing of data to the desired flash row */ + p = (u8 *)&cmd.data; + cmd.reg = CCGX_RAB_FLASH_ROW_RW; + p[0] = FLASH_SIG; + p[1] = fcmd; + put_unaligned_le16(row, &p[2]); + cmd.len = 4; + cmd.delay = 50; + if (fcmd == FLASH_FWCT_SIG_WR_CMD) + cmd.delay += 400; + if (row == 510) + cmd.delay += 220; + ret = ccg_send_command(uc, &cmd); + + mutex_unlock(&uc->lock); + + if (ret != CMD_SUCCESS) { + dev_err(uc->dev, "write flash row failed ret=%d\n", ret); + return ret; + } + + return 0; +} + +static int ccg_cmd_validate_fw(struct ucsi_ccg *uc, unsigned int fwid) +{ + struct ccg_cmd cmd; + int ret; + + cmd.reg = CCGX_RAB_VALIDATE_FW; + cmd.data = fwid; + cmd.len = 1; + cmd.delay = 500; + + mutex_lock(&uc->lock); + + ret = ccg_send_command(uc, &cmd); + + mutex_unlock(&uc->lock); + + if (ret != CMD_SUCCESS) + return ret; + + return 0; +} + +static bool ccg_check_vendor_version(struct ucsi_ccg *uc, + struct version_format *app, + struct fw_config_table *fw_cfg) +{ + struct device *dev = uc->dev; + + /* Check if the fw build is for supported vendors */ + if (le16_to_cpu(app->build) != uc->fw_build) { + dev_info(dev, "current fw is not from supported vendor\n"); + return false; + } + + /* Check if the new fw build is for supported vendors */ + if (le16_to_cpu(fw_cfg->app.build) != uc->fw_build) { + dev_info(dev, "new fw is not from supported vendor\n"); + return false; + } + return true; +} + +static bool ccg_check_fw_version(struct ucsi_ccg *uc, const char *fw_name, + struct version_format *app) +{ + const struct firmware *fw = NULL; + struct device *dev = uc->dev; + struct fw_config_table fw_cfg; + u32 cur_version, new_version; + bool is_later = false; + + if (request_firmware(&fw, fw_name, dev) != 0) { + dev_err(dev, "error: Failed to open cyacd file %s\n", fw_name); + return false; + } + + /* + * check if signed fw + * last part of fw image is fw cfg table and signature + */ + if (fw->size < sizeof(fw_cfg) + FW_CFG_TABLE_SIG_SIZE) + goto out_release_firmware; + + memcpy((uint8_t *)&fw_cfg, fw->data + fw->size - + sizeof(fw_cfg) - FW_CFG_TABLE_SIG_SIZE, sizeof(fw_cfg)); + + if (fw_cfg.identity != ('F' | 'W' << 8 | 'C' << 16 | 'T' << 24)) { + dev_info(dev, "not a signed image\n"); + goto out_release_firmware; + } + + /* compare input version with FWCT version */ + cur_version = le16_to_cpu(app->build) | app->patch << 16 | + app->ver << 24; + + new_version = le16_to_cpu(fw_cfg.app.build) | fw_cfg.app.patch << 16 | + fw_cfg.app.ver << 24; + + if (!ccg_check_vendor_version(uc, app, &fw_cfg)) + goto out_release_firmware; + + if (new_version > cur_version) + is_later = true; + +out_release_firmware: + release_firmware(fw); + return is_later; +} + +static int ccg_fw_update_needed(struct ucsi_ccg *uc, + enum enum_flash_mode *mode) +{ + struct device *dev = uc->dev; + int err; + struct version_info version[3]; + + err = ccg_read(uc, CCGX_RAB_DEVICE_MODE, (u8 *)(&uc->info), + sizeof(uc->info)); + if (err) { + dev_err(dev, "read device mode failed\n"); + return err; + } + + err = ccg_read(uc, CCGX_RAB_READ_ALL_VER, (u8 *)version, + sizeof(version)); + if (err) { + dev_err(dev, "read device mode failed\n"); + return err; + } + + if (memcmp(&version[FW1], "\0\0\0\0\0\0\0\0", + sizeof(struct version_info)) == 0) { + dev_info(dev, "secondary fw is not flashed\n"); + *mode = SECONDARY_BL; + } else if (le16_to_cpu(version[FW1].base.build) < + secondary_fw_min_ver) { + dev_info(dev, "secondary fw version is too low (< %d)\n", + secondary_fw_min_ver); + *mode = SECONDARY; + } else if (memcmp(&version[FW2], "\0\0\0\0\0\0\0\0", + sizeof(struct version_info)) == 0) { + dev_info(dev, "primary fw is not flashed\n"); + *mode = PRIMARY; + } else if (ccg_check_fw_version(uc, ccg_fw_names[PRIMARY], + &version[FW2].app)) { + dev_info(dev, "found primary fw with later version\n"); + *mode = PRIMARY; + } else { + dev_info(dev, "secondary and primary fw are the latest\n"); + *mode = FLASH_NOT_NEEDED; + } + return 0; +} + +static int do_flash(struct ucsi_ccg *uc, enum enum_flash_mode mode) +{ + struct device *dev = uc->dev; + const struct firmware *fw = NULL; + const char *p, *s; + const char *eof; + int err, row, len, line_sz, line_cnt = 0; + unsigned long start_time = jiffies; + struct fw_config_table fw_cfg; + u8 fw_cfg_sig[FW_CFG_TABLE_SIG_SIZE]; + u8 *wr_buf; + + err = request_firmware(&fw, ccg_fw_names[mode], dev); + if (err) { + dev_err(dev, "request %s failed err=%d\n", + ccg_fw_names[mode], err); + return err; + } + + if (((uc->info.mode & CCG_DEVINFO_FWMODE_MASK) >> + CCG_DEVINFO_FWMODE_SHIFT) == FW2) { + err = ccg_cmd_port_control(uc, false); + if (err < 0) + goto release_fw; + err = ccg_cmd_jump_boot_mode(uc, 0); + if (err < 0) + goto release_fw; + } + + eof = fw->data + fw->size; + + /* + * check if signed fw + * last part of fw image is fw cfg table and signature + */ + if (fw->size < sizeof(fw_cfg) + sizeof(fw_cfg_sig)) + goto not_signed_fw; + + memcpy((uint8_t *)&fw_cfg, fw->data + fw->size - + sizeof(fw_cfg) - sizeof(fw_cfg_sig), sizeof(fw_cfg)); + + if (fw_cfg.identity != ('F' | ('W' << 8) | ('C' << 16) | ('T' << 24))) { + dev_info(dev, "not a signed image\n"); + goto not_signed_fw; + } + eof = fw->data + fw->size - sizeof(fw_cfg) - sizeof(fw_cfg_sig); + + memcpy((uint8_t *)&fw_cfg_sig, + fw->data + fw->size - sizeof(fw_cfg_sig), sizeof(fw_cfg_sig)); + + /* flash fw config table and signature first */ + err = ccg_cmd_write_flash_row(uc, 0, (u8 *)&fw_cfg, + FLASH_FWCT1_WR_CMD); + if (err) + goto release_fw; + + err = ccg_cmd_write_flash_row(uc, 0, (u8 *)&fw_cfg + CCG4_ROW_SIZE, + FLASH_FWCT2_WR_CMD); + if (err) + goto release_fw; + + err = ccg_cmd_write_flash_row(uc, 0, &fw_cfg_sig, + FLASH_FWCT_SIG_WR_CMD); + if (err) + goto release_fw; + +not_signed_fw: + wr_buf = kzalloc(CCG4_ROW_SIZE + 4, GFP_KERNEL); + if (!wr_buf) + return -ENOMEM; + + err = ccg_cmd_enter_flashing(uc); + if (err) + goto release_mem; + + /***************************************************************** + * CCG firmware image (.cyacd) file line format + * + * :00rrrrllll[dd....]cc/r/n + * + * :00 header + * rrrr is row number to flash (4 char) + * llll is data len to flash (4 char) + * dd is a data field represents one byte of data (512 char) + * cc is checksum (2 char) + * \r\n newline + * + * Total length: 3 + 4 + 4 + 512 + 2 + 2 = 527 + * + *****************************************************************/ + + p = strnchr(fw->data, fw->size, ':'); + while (p < eof) { + s = strnchr(p + 1, eof - p - 1, ':'); + + if (!s) + s = eof; + + line_sz = s - p; + + if (line_sz != CYACD_LINE_SIZE) { + dev_err(dev, "Bad FW format line_sz=%d\n", line_sz); + err = -EINVAL; + goto release_mem; + } + + if (hex2bin(wr_buf, p + 3, CCG4_ROW_SIZE + 4)) { + err = -EINVAL; + goto release_mem; + } + + row = get_unaligned_be16(wr_buf); + len = get_unaligned_be16(&wr_buf[2]); + + if (len != CCG4_ROW_SIZE) { + err = -EINVAL; + goto release_mem; + } + + err = ccg_cmd_write_flash_row(uc, row, wr_buf + 4, + FLASH_WR_CMD); + if (err) + goto release_mem; + + line_cnt++; + p = s; + } + + dev_info(dev, "total %d row flashed. time: %dms\n", + line_cnt, jiffies_to_msecs(jiffies - start_time)); + + err = ccg_cmd_validate_fw(uc, (mode == PRIMARY) ? FW2 : FW1); + if (err) + dev_err(dev, "%s validation failed err=%d\n", + (mode == PRIMARY) ? "FW2" : "FW1", err); + else + dev_info(dev, "%s validated\n", + (mode == PRIMARY) ? "FW2" : "FW1"); + + err = ccg_cmd_port_control(uc, false); + if (err < 0) + goto release_mem; + + err = ccg_cmd_reset(uc); + if (err < 0) + goto release_mem; + + err = ccg_cmd_port_control(uc, true); + if (err < 0) + goto release_mem; + +release_mem: + kfree(wr_buf); + +release_fw: + release_firmware(fw); + return err; +} + +/******************************************************************************* + * CCG4 has two copies of the firmware in addition to the bootloader. + * If the device is running FW1, FW2 can be updated with the new version. + * Dual firmware mode allows the CCG device to stay in a PD contract and support + * USB PD and Type-C functionality while a firmware update is in progress. + ******************************************************************************/ +static int ccg_fw_update(struct ucsi_ccg *uc, enum enum_flash_mode flash_mode) +{ + int err; + + while (flash_mode != FLASH_NOT_NEEDED) { + err = do_flash(uc, flash_mode); + if (err < 0) + return err; + err = ccg_fw_update_needed(uc, &flash_mode); + if (err < 0) + return err; + } + dev_info(uc->dev, "CCG FW update successful\n"); + + return err; +} + +static int ccg_restart(struct ucsi_ccg *uc) +{ + struct device *dev = uc->dev; + int status; + + status = ucsi_ccg_init(uc); + if (status < 0) { + dev_err(dev, "ucsi_ccg_start fail, err=%d\n", status); + return status; + } + + status = request_threaded_irq(uc->irq, NULL, ccg_irq_handler, + IRQF_ONESHOT | IRQF_TRIGGER_HIGH, + dev_name(dev), uc); + if (status < 0) { + dev_err(dev, "request_threaded_irq failed - %d\n", status); + return status; + } + + uc->ucsi = ucsi_register_ppm(dev, &uc->ppm); + if (IS_ERR(uc->ucsi)) { + dev_err(uc->dev, "ucsi_register_ppm failed\n"); + return PTR_ERR(uc->ucsi); + } + + return 0; +} + +static void ccg_update_firmware(struct work_struct *work) +{ + struct ucsi_ccg *uc = container_of(work, struct ucsi_ccg, work); + enum enum_flash_mode flash_mode; + int status; + + status = ccg_fw_update_needed(uc, &flash_mode); + if (status < 0) + return; + + if (flash_mode != FLASH_NOT_NEEDED) { + ucsi_unregister_ppm(uc->ucsi); + free_irq(uc->irq, uc); + + ccg_fw_update(uc, flash_mode); + ccg_restart(uc); + } +} + +static ssize_t do_flash_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t n) +{ + struct ucsi_ccg *uc = i2c_get_clientdata(to_i2c_client(dev)); + bool flash; + + if (kstrtobool(buf, &flash)) + return -EINVAL; + + if (!flash) + return n; + + if (uc->fw_build == 0x0) { + dev_err(dev, "fail to flash FW due to missing FW build info\n"); + return -EINVAL; + } + + schedule_work(&uc->work); + return n; +} + +static DEVICE_ATTR_WO(do_flash); + +static struct attribute *ucsi_ccg_sysfs_attrs[] = { + &dev_attr_do_flash.attr, + NULL, +}; + +static struct attribute_group ucsi_ccg_attr_group = { + .attrs = ucsi_ccg_sysfs_attrs, +}; + static int ucsi_ccg_probe(struct i2c_client *client, const struct i2c_device_id *id) { @@ -240,6 +1076,14 @@ static int ucsi_ccg_probe(struct i2c_client *client, uc->ppm.sync = ucsi_ccg_sync; uc->dev = dev; uc->client = client; + mutex_init(&uc->lock); + INIT_WORK(&uc->work, ccg_update_firmware); + + /* Only fail FW flashing when FW build information is not provided */ + status = device_property_read_u16(dev, "ccgx,firmware-build", + &uc->fw_build); + if (status) + dev_err(uc->dev, "failed to get FW build information\n"); /* reset ccg device and initialize ucsi */ status = ucsi_ccg_init(uc); @@ -248,15 +1092,27 @@ static int ucsi_ccg_probe(struct i2c_client *client, return status; } - status = devm_request_threaded_irq(dev, client->irq, NULL, - ccg_irq_handler, - IRQF_ONESHOT | IRQF_TRIGGER_HIGH, - dev_name(dev), uc); + status = get_fw_info(uc); + if (status < 0) { + dev_err(uc->dev, "get_fw_info failed - %d\n", status); + return status; + } + + uc->port_num = 1; + + if (uc->info.mode & CCG_DEVINFO_PDPORTS_MASK) + uc->port_num++; + + status = request_threaded_irq(client->irq, NULL, ccg_irq_handler, + IRQF_ONESHOT | IRQF_TRIGGER_HIGH, + dev_name(dev), uc); if (status < 0) { dev_err(uc->dev, "request_threaded_irq failed - %d\n", status); return status; } + uc->irq = client->irq; + uc->ucsi = ucsi_register_ppm(dev, &uc->ppm); if (IS_ERR(uc->ucsi)) { dev_err(uc->dev, "ucsi_register_ppm failed\n"); @@ -273,6 +1129,11 @@ static int ucsi_ccg_probe(struct i2c_client *client, } i2c_set_clientdata(client, uc); + + status = sysfs_create_group(&uc->dev->kobj, &ucsi_ccg_attr_group); + if (status) + dev_err(uc->dev, "cannot create sysfs group: %d\n", status); + return 0; } @@ -280,7 +1141,10 @@ static int ucsi_ccg_remove(struct i2c_client *client) { struct ucsi_ccg *uc = i2c_get_clientdata(client); + cancel_work_sync(&uc->work); ucsi_unregister_ppm(uc->ucsi); + free_irq(uc->irq, uc); + sysfs_remove_group(&uc->dev->kobj, &ucsi_ccg_attr_group); return 0; } |