#include <linux/acpi.h>
#include <linux/module.h>
#include <linux/usb/tcpm.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/mfd/intel_soc_pmic.h>
#define WCOVE_CHGRIRQ0 0x4e09
#define USBC_CONTROL1 0x7001
#define USBC_CONTROL2 0x7002
#define USBC_CONTROL3 0x7003
#define USBC_CC1_CTRL 0x7004
#define USBC_CC2_CTRL 0x7005
#define USBC_STATUS1 0x7007
#define USBC_STATUS2 0x7008
#define USBC_STATUS3 0x7009
#define USBC_CC1 0x700a
#define USBC_CC2 0x700b
#define USBC_CC1_STATUS 0x700c
#define USBC_CC2_STATUS 0x700d
#define USBC_IRQ1 0x7015
#define USBC_IRQ2 0x7016
#define USBC_IRQMASK1 0x7017
#define USBC_IRQMASK2 0x7018
#define USBC_PDCFG2 0x701a
#define USBC_PDCFG3 0x701b
#define USBC_PDSTATUS 0x701c
#define USBC_RXSTATUS 0x701d
#define USBC_RXINFO 0x701e
#define USBC_TXCMD 0x701f
#define USBC_TXINFO 0x7020
#define USBC_RX_DATA 0x7028
#define USBC_TX_DATA 0x7047
#define USBC_CONTROL1_MODE_MASK 0x3
#define USBC_CONTROL1_MODE_SNK 0
#define USBC_CONTROL1_MODE_SNKACC 1
#define USBC_CONTROL1_MODE_SRC 2
#define USBC_CONTROL1_MODE_SRCACC 3
#define USBC_CONTROL1_MODE_DRP 4
#define USBC_CONTROL1_MODE_DRPACC 5
#define USBC_CONTROL1_MODE_TEST 7
#define USBC_CONTROL1_CURSRC_MASK 0xc
#define USBC_CONTROL1_CURSRC_UA_0 (0 << 3)
#define USBC_CONTROL1_CURSRC_UA_80 (1 << 3)
#define USBC_CONTROL1_CURSRC_UA_180 (2 << 3)
#define USBC_CONTROL1_CURSRC_UA_330 (3 << 3)
#define USBC_CONTROL1_DRPTOGGLE_RANDOM 0xe0
#define USBC_CONTROL2_UNATT_SNK BIT(0)
#define USBC_CONTROL2_UNATT_SRC BIT(1)
#define USBC_CONTROL2_DIS_ST BIT(2)
#define USBC_CONTROL3_DET_DIS BIT(0)
#define USBC_CONTROL3_PD_DIS BIT(1)
#define USBC_CONTROL3_RESETPHY BIT(2)
#define USBC_CC_CTRL_PU_EN BIT(0)
#define USBC_CC_CTRL_VCONN_EN BIT(1)
#define USBC_CC_CTRL_TX_EN BIT(2)
#define USBC_CC_CTRL_PD_EN BIT(3)
#define USBC_CC_CTRL_CDET_EN BIT(4)
#define USBC_CC_CTRL_RDET_EN BIT(5)
#define USBC_CC_CTRL_ADC_EN BIT(6)
#define USBC_CC_CTRL_VBUSOK BIT(7)
#define USBC_STATUS1_DET_ONGOING BIT(6)
#define USBC_STATUS1_RSLT(r) ((r) & 0xf)
#define USBC_RSLT_NOTHING 0
#define USBC_RSLT_SRC_DEFAULT 1
#define USBC_RSLT_SRC_1_5A 2
#define USBC_RSLT_SRC_3_0A 3
#define USBC_RSLT_SNK 4
#define USBC_RSLT_DEBUG_ACC 5
#define USBC_RSLT_AUDIO_ACC 6
#define USBC_RSLT_UNDEF 15
#define USBC_STATUS1_ORIENT(r) (((r) >> 4) & 0x3)
#define USBC_ORIENT_NORMAL 1
#define USBC_ORIENT_REVERSE 2
#define USBC_STATUS2_VBUS_REQ BIT(5)
#define UCSC_CC_STATUS_SNK_RP BIT(0)
#define UCSC_CC_STATUS_PWRDEFSNK BIT(1)
#define UCSC_CC_STATUS_PWR_1P5A_SNK BIT(2)
#define UCSC_CC_STATUS_PWR_3A_SNK BIT(3)
#define UCSC_CC_STATUS_SRC_RP BIT(4)
#define UCSC_CC_STATUS_RX(r) (((r) >> 5) & 0x3)
#define USBC_CC_STATUS_RD 1
#define USBC_CC_STATUS_RA 2
#define USBC_IRQ1_ADCDONE1 BIT(2)
#define USBC_IRQ1_OVERTEMP BIT(1)
#define USBC_IRQ1_SHORT BIT(0)
#define USBC_IRQ2_CC_CHANGE BIT(7)
#define USBC_IRQ2_RX_PD BIT(6)
#define USBC_IRQ2_RX_HR BIT(5)
#define USBC_IRQ2_RX_CR BIT(4)
#define USBC_IRQ2_TX_SUCCESS BIT(3)
#define USBC_IRQ2_TX_FAIL BIT(2)
#define USBC_IRQMASK1_ALL (USBC_IRQ1_ADCDONE1 | USBC_IRQ1_OVERTEMP | \
USBC_IRQ1_SHORT)
#define USBC_IRQMASK2_ALL (USBC_IRQ2_CC_CHANGE | USBC_IRQ2_RX_PD | \
USBC_IRQ2_RX_HR | USBC_IRQ2_RX_CR | \
USBC_IRQ2_TX_SUCCESS | USBC_IRQ2_TX_FAIL)
#define USBC_PDCFG2_SOP BIT(0)
#define USBC_PDCFG2_SOP_P BIT(1)
#define USBC_PDCFG2_SOP_PP BIT(2)
#define USBC_PDCFG2_SOP_P_DEBUG BIT(3)
#define USBC_PDCFG2_SOP_PP_DEBUG BIT(4)
#define USBC_PDCFG3_DATAROLE_SHIFT 1
#define USBC_PDCFG3_SOP_SHIFT 2
#define USBC_RXSTATUS_RXCLEAR BIT(0)
#define USBC_RXSTATUS_RXDATA BIT(7)
#define USBC_RXINFO_RXBYTES(i) (((i) >> 3) & 0x1f)
#define USBC_TXCMD_BUF_RDY BIT(0)
#define USBC_TXCMD_START BIT(1)
#define USBC_TXCMD_NOP (0 << 5)
#define USBC_TXCMD_MSG (1 << 5)
#define USBC_TXCMD_CR (2 << 5)
#define USBC_TXCMD_HR (3 << 5)
#define USBC_TXCMD_BIST (4 << 5)
#define USBC_TXINFO_RETRIES(d) (d << 3)
struct wcove_typec {
struct mutex lock;
struct device *dev;
struct regmap *regmap;
guid_t guid;
bool vbus;
struct tcpc_dev tcpc;
struct tcpm_port *tcpm;
};
#define tcpc_to_wcove(_tcpc_) container_of(_tcpc_, struct wcove_typec, tcpc)
enum wcove_typec_func {
WCOVE_FUNC_DRIVE_VBUS = 1,
WCOVE_FUNC_ORIENTATION,
WCOVE_FUNC_ROLE,
WCOVE_FUNC_DRIVE_VCONN,
};
enum wcove_typec_orientation {
WCOVE_ORIENTATION_NORMAL,
WCOVE_ORIENTATION_REVERSE,
};
enum wcove_typec_role {
WCOVE_ROLE_HOST,
WCOVE_ROLE_DEVICE,
};
#define WCOVE_DSM_UUID "482383f0-2876-4e49-8685-db66211af037"
static int wcove_typec_func(struct wcove_typec *wcove,
enum wcove_typec_func func, int param)
{
union acpi_object *obj;
union acpi_object tmp;
union acpi_object argv4 = ACPI_INIT_DSM_ARGV4(1, &tmp);
tmp.type = ACPI_TYPE_INTEGER;
tmp.integer.value = param;
obj = acpi_evaluate_dsm(ACPI_HANDLE(wcove->dev), &wcove->guid, 1, func,
&argv4);
if (!obj) {
dev_err(wcove->dev, "%s: failed to evaluate _DSM\n", __func__);
return -EIO;
}
ACPI_FREE(obj);
return 0;
}
static int wcove_init(struct tcpc_dev *tcpc)
{
struct wcove_typec *wcove = tcpc_to_wcove(tcpc);
int ret;
ret = regmap_write(wcove->regmap, USBC_CONTROL1, 0);
if (ret)
return ret;
ret = regmap_write(wcove->regmap, USBC_IRQMASK1, 0);
if (ret)
return ret;
return regmap_write(wcove->regmap, USBC_IRQMASK2, 0);
}
static int wcove_get_vbus(struct tcpc_dev *tcpc)
{
struct wcove_typec *wcove = tcpc_to_wcove(tcpc);
unsigned int cc1ctrl;
int ret;
ret = regmap_read(wcove->regmap, USBC_CC1_CTRL, &cc1ctrl);
if (ret)
return ret;
wcove->vbus = !!(cc1ctrl & USBC_CC_CTRL_VBUSOK);
return wcove->vbus;
}
static int wcove_set_vbus(struct tcpc_dev *tcpc, bool on, bool sink)
{
struct wcove_typec *wcove = tcpc_to_wcove(tcpc);
return wcove_typec_func(wcove, WCOVE_FUNC_DRIVE_VBUS, on);
}
static int wcove_set_vconn(struct tcpc_dev *tcpc, bool on)
{
struct wcove_typec *wcove = tcpc_to_wcove(tcpc);
return wcove_typec_func(wcove, WCOVE_FUNC_DRIVE_VCONN, on);
}
static enum typec_cc_status wcove_to_typec_cc(unsigned int cc)
{
if (cc & UCSC_CC_STATUS_SNK_RP) {
if (cc & UCSC_CC_STATUS_PWRDEFSNK)
return TYPEC_CC_RP_DEF;
else if (cc & UCSC_CC_STATUS_PWR_1P5A_SNK)
return TYPEC_CC_RP_1_5;
else if (cc & UCSC_CC_STATUS_PWR_3A_SNK)
return TYPEC_CC_RP_3_0;
} else {
switch (UCSC_CC_STATUS_RX(cc)) {
case USBC_CC_STATUS_RD:
return TYPEC_CC_RD;
case USBC_CC_STATUS_RA:
return TYPEC_CC_RA;
default:
break;
}
}
return TYPEC_CC_OPEN;
}
static int wcove_get_cc(struct tcpc_dev *tcpc, enum typec_cc_status *cc1,
enum typec_cc_status *cc2)
{
struct wcove_typec *wcove = tcpc_to_wcove(tcpc);
unsigned int cc1_status;
unsigned int cc2_status;
int ret;
ret = regmap_read(wcove->regmap, USBC_CC1_STATUS, &cc1_status);
if (ret)
return ret;
ret = regmap_read(wcove->regmap, USBC_CC2_STATUS, &cc2_status);
if (ret)
return ret;
*cc1 = wcove_to_typec_cc(cc1_status);
*cc2 = wcove_to_typec_cc(cc2_status);
return 0;
}
static int wcove_set_cc(struct tcpc_dev *tcpc, enum typec_cc_status cc)
{
struct wcove_typec *wcove = tcpc_to_wcove(tcpc);
unsigned int ctrl;
switch (cc) {
case TYPEC_CC_RD:
ctrl = USBC_CONTROL1_MODE_SNK;
break;
case TYPEC_CC_RP_DEF:
ctrl = USBC_CONTROL1_CURSRC_UA_80 | USBC_CONTROL1_MODE_SRC;
break;
case TYPEC_CC_RP_1_5:
ctrl = USBC_CONTROL1_CURSRC_UA_180 | USBC_CONTROL1_MODE_SRC;
break;
case TYPEC_CC_RP_3_0:
ctrl = USBC_CONTROL1_CURSRC_UA_330 | USBC_CONTROL1_MODE_SRC;
break;
case TYPEC_CC_OPEN:
ctrl = 0;
break;
default:
return -EINVAL;
}
return regmap_write(wcove->regmap, USBC_CONTROL1, ctrl);
}
static int wcove_set_polarity(struct tcpc_dev *tcpc, enum typec_cc_polarity pol)
{
struct wcove_typec *wcove = tcpc_to_wcove(tcpc);
return wcove_typec_func(wcove, WCOVE_FUNC_ORIENTATION, pol);
}
static int wcove_set_current_limit(struct tcpc_dev *tcpc, u32 max_ma, u32 mv)
{
return 0;
}
static int wcove_set_roles(struct tcpc_dev *tcpc, bool attached,
enum typec_role role, enum typec_data_role data)
{
struct wcove_typec *wcove = tcpc_to_wcove(tcpc);
unsigned int val;
int ret;
ret = wcove_typec_func(wcove, WCOVE_FUNC_ROLE, data == TYPEC_HOST ?
WCOVE_ROLE_HOST : WCOVE_ROLE_DEVICE);
if (ret)
return ret;
val = role;
val |= data << USBC_PDCFG3_DATAROLE_SHIFT;
val |= PD_REV20 << USBC_PDCFG3_SOP_SHIFT;
return regmap_write(wcove->regmap, USBC_PDCFG3, val);
}
static int wcove_set_pd_rx(struct tcpc_dev *tcpc, bool on)
{
struct wcove_typec *wcove = tcpc_to_wcove(tcpc);
return regmap_write(wcove->regmap, USBC_PDCFG2,
on ? USBC_PDCFG2_SOP : 0);
}
static int wcove_pd_transmit(struct tcpc_dev *tcpc,
enum tcpm_transmit_type type,
const struct pd_message *msg,
unsigned int negotiated_rev)
{
struct wcove_typec *wcove = tcpc_to_wcove(tcpc);
unsigned int info = 0;
unsigned int cmd;
int ret;
ret = regmap_read(wcove->regmap, USBC_TXCMD, &cmd);
if (ret)
return ret;
if (!(cmd & USBC_TXCMD_BUF_RDY)) {
dev_warn(wcove->dev, "%s: Last transmission still ongoing!",
__func__);
return -EBUSY;
}
if (msg) {
const u8 *data = (void *)msg;
int i;
for (i = 0; i < pd_header_cnt_le(msg->header) * 4 + 2; i++) {
ret = regmap_write(wcove->regmap, USBC_TX_DATA + i,
data[i]);
if (ret)
return ret;
}
}
switch (type) {
case TCPC_TX_SOP:
case TCPC_TX_SOP_PRIME:
case TCPC_TX_SOP_PRIME_PRIME:
case TCPC_TX_SOP_DEBUG_PRIME:
case TCPC_TX_SOP_DEBUG_PRIME_PRIME:
info = type + 1;
cmd = USBC_TXCMD_MSG;
break;
case TCPC_TX_HARD_RESET:
cmd = USBC_TXCMD_HR;
break;
case TCPC_TX_CABLE_RESET:
cmd = USBC_TXCMD_CR;
break;
case TCPC_TX_BIST_MODE_2:
cmd = USBC_TXCMD_BIST;
break;
default:
return -EINVAL;
}
ret = regmap_write(wcove->regmap, USBC_TXINFO,
info | USBC_TXINFO_RETRIES(7));
if (ret)
return ret;
return regmap_write(wcove->regmap, USBC_TXCMD, cmd | USBC_TXCMD_START);
}
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) {
case TYPEC_CC_RP_1_5:
usbc_ctrl |= USBC_CONTROL1_CURSRC_UA_180;
break;
case TYPEC_CC_RP_3_0:
usbc_ctrl |= USBC_CONTROL1_CURSRC_UA_330;
break;
default:
usbc_ctrl |= USBC_CONTROL1_CURSRC_UA_80;
break;
}
return regmap_write(wcove->regmap, USBC_CONTROL1, usbc_ctrl);
}
static int wcove_read_rx_buffer(struct wcove_typec *wcove, void *msg)
{
unsigned int info;
int ret;
int i;
ret = regmap_read(wcove->regmap, USBC_RXINFO, &info);
if (ret)
return ret;
for (i = 0; i < USBC_RXINFO_RXBYTES(info); i++) {
ret = regmap_read(wcove->regmap, USBC_RX_DATA + i, msg + i);
if (ret)
return ret;
}
return regmap_write(wcove->regmap, USBC_RXSTATUS,
USBC_RXSTATUS_RXCLEAR);
}
static irqreturn_t wcove_typec_irq(int irq, void *data)
{
struct wcove_typec *wcove = data;
unsigned int usbc_irq1 = 0;
unsigned int usbc_irq2 = 0;
unsigned int cc1ctrl;
int ret;
mutex_lock(&wcove->lock);
ret = regmap_read(wcove->regmap, USBC_IRQ1, &usbc_irq1);
if (ret)
goto err;
ret = regmap_read(wcove->regmap, USBC_IRQ2, &usbc_irq2);
if (ret)
goto err;
ret = regmap_read(wcove->regmap, USBC_CC1_CTRL, &cc1ctrl);
if (ret)
goto err;
if (!wcove->tcpm)
goto err;
if (usbc_irq1 & USBC_IRQ1_OVERTEMP) {
dev_err(wcove->dev, "VCONN Switch Over Temperature!\n");
wcove_typec_func(wcove, WCOVE_FUNC_DRIVE_VCONN, false);
}
if (usbc_irq1 & USBC_IRQ1_SHORT) {
dev_err(wcove->dev, "VCONN Switch Short Circuit!\n");
wcove_typec_func(wcove, WCOVE_FUNC_DRIVE_VCONN, false);
}
if (wcove->vbus != !!(cc1ctrl & USBC_CC_CTRL_VBUSOK))
tcpm_vbus_change(wcove->tcpm);
if (usbc_irq2 & USBC_IRQ2_CC_CHANGE)
tcpm_cc_change(wcove->tcpm);
if (usbc_irq2 & USBC_IRQ2_RX_PD) {
unsigned int status;
ret = regmap_read(wcove->regmap, USBC_RXSTATUS, &status);
if (ret)
goto err;
while (status & USBC_RXSTATUS_RXDATA) {
struct pd_message msg;
ret = wcove_read_rx_buffer(wcove, &msg);
if (ret) {
dev_err(wcove->dev, "%s: RX read failed\n",
__func__);
goto err;
}
tcpm_pd_receive(wcove->tcpm, &msg, TCPC_TX_SOP);
ret = regmap_read(wcove->regmap, USBC_RXSTATUS,
&status);
if (ret)
goto err;
}
}
if (usbc_irq2 & USBC_IRQ2_RX_HR)
tcpm_pd_hard_reset(wcove->tcpm);
if (usbc_irq2 & USBC_IRQ2_TX_SUCCESS)
tcpm_pd_transmit_complete(wcove->tcpm, TCPC_TX_SUCCESS);
if (usbc_irq2 & USBC_IRQ2_TX_FAIL)
tcpm_pd_transmit_complete(wcove->tcpm, TCPC_TX_FAILED);
err:
if (usbc_irq1) {
ret = regmap_write(wcove->regmap, USBC_IRQ1, usbc_irq1);
if (ret)
dev_WARN(wcove->dev, "%s failed to clear IRQ1\n",
__func__);
}
if (usbc_irq2) {
ret = regmap_write(wcove->regmap, USBC_IRQ2, usbc_irq2);
if (ret)
dev_WARN(wcove->dev, "%s failed to clear IRQ2\n",
__func__);
}
regmap_write(wcove->regmap, WCOVE_CHGRIRQ0, BIT(5));
mutex_unlock(&wcove->lock);
return IRQ_HANDLED;
}
static const u32 src_pdo[] = {
PDO_FIXED(5000, 1500, PDO_FIXED_DUAL_ROLE | PDO_FIXED_DATA_SWAP |
PDO_FIXED_USB_COMM),
};
static const u32 snk_pdo[] = {
PDO_FIXED(5000, 500, PDO_FIXED_DUAL_ROLE | PDO_FIXED_DATA_SWAP |
PDO_FIXED_USB_COMM),
PDO_VAR(5000, 12000, 3000),
};
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", 15000000),
{ }
};
static int wcove_typec_probe(struct platform_device *pdev)
{
struct intel_soc_pmic *pmic = dev_get_drvdata(pdev->dev.parent);
struct wcove_typec *wcove;
int irq;
int ret;
wcove = devm_kzalloc(&pdev->dev, sizeof(*wcove), GFP_KERNEL);
if (!wcove)
return -ENOMEM;
mutex_init(&wcove->lock);
wcove->dev = &pdev->dev;
wcove->regmap = pmic->regmap;
irq = platform_get_irq(pdev, 0);
if (irq < 0)
return irq;
ret = guid_parse(WCOVE_DSM_UUID, &wcove->guid);
if (ret)
return ret;
if (!acpi_check_dsm(ACPI_HANDLE(&pdev->dev), &wcove->guid, 0, 0x1f)) {
dev_err(&pdev->dev, "Missing _DSM functions\n");
return -ENODEV;
}
wcove->tcpc.init = wcove_init;
wcove->tcpc.get_vbus = wcove_get_vbus;
wcove->tcpc.set_vbus = wcove_set_vbus;
wcove->tcpc.set_cc = wcove_set_cc;
wcove->tcpc.get_cc = wcove_get_cc;
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_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.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)) {
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;
}
platform_set_drvdata(pdev, wcove);
return 0;
}
static void wcove_typec_remove(struct platform_device *pdev)
{
struct wcove_typec *wcove = platform_get_drvdata(pdev);
unsigned int val;
regmap_read(wcove->regmap, USBC_IRQMASK1, &val);
regmap_write(wcove->regmap, USBC_IRQMASK1, val | USBC_IRQMASK1_ALL);
regmap_read(wcove->regmap, USBC_IRQMASK2, &val);
regmap_write(wcove->regmap, USBC_IRQMASK2, val | USBC_IRQMASK2_ALL);
tcpm_unregister_port(wcove->tcpm);
fwnode_remove_software_node(wcove->tcpc.fwnode);
}
static struct platform_driver wcove_typec_driver = {
.driver = {
.name = "bxt_wcove_usbc",
},
.probe = wcove_typec_probe,
.remove = wcove_typec_remove,
};
module_platform_driver(wcove_typec_driver);
MODULE_AUTHOR("Intel Corporation");
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("WhiskeyCove PMIC USB Type-C PHY driver");
MODULE_ALIAS("platform:bxt_wcove_usbc");
