4  * SPDX-License-Identifier: Apache-2.0
28  * This driver is single-instance. If the devicetree contains multiple
34 /* The following constants describes the bitrate of it8xxx2 PECI,
41 /* The following masks are designed for the PECI bitrate settings,
103 	uint32_t bitrate;  member
121 	reg_base->PADCTLR = (reg_base->PADCTLR & PECI_DVIE) | vol_opt;  in peci_it8xxx2_init_vtts()
126 	reg_base->HOSTAR = HOSTAR_RST_ANYBIT;  in peci_it8xxx2_rst_status()
131 	return (reg_base->HOSTAR & HOBY) ? (-EBUSY) : 0;  in peci_it8xxx2_check_host_busy()
136 	struct peci_it8xxx2_data *data = dev->data;  in peci_it8xxx2_check_host_finish()  local
137 	const struct peci_it8xxx2_config *config = dev->config;  in peci_it8xxx2_check_host_finish()
139 		(struct peci_it8xxx2_regs *)config->base_addr;  in peci_it8xxx2_check_host_finish()
141 	int ret = k_sem_take(&data->device_sync_sem, K_MSEC(PECI_TIMEOUT_MS));  in peci_it8xxx2_check_host_finish()
143 	if (ret == -EAGAIN) {  in peci_it8xxx2_check_host_finish()
145 		return -ETIMEDOUT;  in peci_it8xxx2_check_host_finish()
148 	if (peci_regs->HOSTAR != FINISH) {  in peci_it8xxx2_check_host_finish()
149 		LOG_ERR("[PECI] Error: HOSTAR=0x%02X\r\n", peci_regs->HOSTAR);  in peci_it8xxx2_check_host_finish()
150 			return -EIO;  in peci_it8xxx2_check_host_finish()
156 static int peci_it8xxx2_configure(const struct device *dev, uint32_t bitrate)  in peci_it8xxx2_configure()  argument
158 	struct peci_it8xxx2_data *data = dev->data;  in peci_it8xxx2_configure()  local
159 	const struct peci_it8xxx2_config *config = dev->config;  in peci_it8xxx2_configure()
161 		(struct peci_it8xxx2_regs *)config->base_addr;  in peci_it8xxx2_configure()
165 	data->bitrate =  bitrate;  in peci_it8xxx2_configure()
168 		(peci_regs->HOCTL2R) & (~(PECI_IT8XXX2_BITRATE_BITS_MASK));  in peci_it8xxx2_configure()
170 	switch (bitrate) {  in peci_it8xxx2_configure()
183 		LOG_ERR("[PECI] Error: Specified Bitrate Not Supported\r\n");  in peci_it8xxx2_configure()
185 		data->bitrate =  PECI_IT8XXX2_BITRATE_1MHZ;  in peci_it8xxx2_configure()
186 		peci_regs->HOCTL2R = hoctl2r_to_write;  in peci_it8xxx2_configure()
187 		return -ENOTSUP;  in peci_it8xxx2_configure()
190 	peci_regs->HOCTL2R = hoctl2r_to_write;  in peci_it8xxx2_configure()
197 	const struct peci_it8xxx2_config *config = dev->config;  in peci_it8xxx2_enable()
199 		(struct peci_it8xxx2_regs *)config->base_addr;  in peci_it8xxx2_enable()
201 	peci_regs->HOCTLR |= (FIFOCLR|FCSERR_ABT|PECIHEN|CONTROL);  in peci_it8xxx2_enable()
208 	const struct peci_it8xxx2_config *config = dev->config;  in peci_it8xxx2_disable()
210 		(struct peci_it8xxx2_regs *)config->base_addr;  in peci_it8xxx2_disable()
212 	peci_regs->HOCTLR &= ~(PECIHEN);  in peci_it8xxx2_disable()
218 	const struct peci_it8xxx2_config *config = dev->config;  in peci_it8xxx2_rst_module()
220 		(struct peci_it8xxx2_regs *)config->base_addr;  in peci_it8xxx2_rst_module()
225 	gctrl_regs->GCTRL_RSTC4 |= IT8XXX2_GCTRL_RPECI;  in peci_it8xxx2_rst_module()
233 	peci_regs->PADCTLR |= PECI_DVIE;  in peci_it8xxx2_rst_module()
242 	const struct peci_it8xxx2_config *config = dev->config;  in peci_it8xxx2_transfer()
244 		(struct peci_it8xxx2_regs *)config->base_addr;  in peci_it8xxx2_transfer()
246 	struct peci_buf *peci_rx_buf = &msg->rx_buffer;  in peci_it8xxx2_transfer()
247 	struct peci_buf *peci_tx_buf = &msg->tx_buffer;  in peci_it8xxx2_transfer()
253 	if (!(peci_regs->HOCTLR & PECIHEN)) {  in peci_it8xxx2_transfer()
255 		return -ECONNREFUSED;  in peci_it8xxx2_transfer()
259 		return -EBUSY;  in peci_it8xxx2_transfer()
262 	peci_regs->HOTRADDR = msg->addr;  in peci_it8xxx2_transfer()
263 	peci_regs->HOWRLR = peci_tx_buf->len;  in peci_it8xxx2_transfer()
264 	peci_regs->HORDLR = peci_rx_buf->len;  in peci_it8xxx2_transfer()
265 	peci_regs->HOCMDR = msg->cmd_code;  in peci_it8xxx2_transfer()
267 	if (msg->cmd_code != PECI_CMD_PING) {  in peci_it8xxx2_transfer()
268 		for (cnt = 0; cnt < (peci_tx_buf->len - 1); cnt++) {  in peci_it8xxx2_transfer()
269 			peci_regs->HOWRDR = peci_tx_buf->buf[cnt];  in peci_it8xxx2_transfer()
274 	irq_enable(config->irq_no);  in peci_it8xxx2_transfer()
275 	peci_regs->HOCTLR |= START;  in peci_it8xxx2_transfer()
279 		/* Host Transactions Finished, Fetch Data from the regs */  in peci_it8xxx2_transfer()
280 		if (peci_rx_buf->len) {  in peci_it8xxx2_transfer()
281 			for (cnt = 0; cnt < (peci_rx_buf->len); cnt++) {  in peci_it8xxx2_transfer()
282 				peci_rx_buf->buf[cnt] = peci_regs->HORDDR;  in peci_it8xxx2_transfer()
297 	struct peci_it8xxx2_data *data = dev->data;  in peci_it8xxx2_isr()  local
298 	const struct peci_it8xxx2_config *config = dev->config;  in peci_it8xxx2_isr()
300 	irq_disable(config->irq_no);  in peci_it8xxx2_isr()
301 	k_sem_give(&data->device_sync_sem);  in peci_it8xxx2_isr()
313 	struct peci_it8xxx2_data *data = dev->data;  in peci_it8xxx2_init()  local
314 	const struct peci_it8xxx2_config *config = dev->config;  in peci_it8xxx2_init()
316 		(struct peci_it8xxx2_regs *)config->base_addr;  in peci_it8xxx2_init()
320 	k_sem_init(&data->device_sync_sem, 0, 1);  in peci_it8xxx2_init()
323 	status = pinctrl_apply_state(config->pcfg, PINCTRL_STATE_DEFAULT);  in peci_it8xxx2_init()
329 	peci_regs->PADCTLR |= PECI_DVIE;  in peci_it8xxx2_init()