48 static void esp32s3_acm_write(struct uart_port *port, unsigned long reg, u32 v)  in esp32s3_acm_write()  argument
50 	writel(v, port->membase + reg);  in esp32s3_acm_write()
53 static u32 esp32s3_acm_read(struct uart_port *port, unsigned long reg)  in esp32s3_acm_read()  argument
55 	return readl(port->membase + reg);  in esp32s3_acm_read()
58 static u32 esp32s3_acm_tx_fifo_free(struct uart_port *port)  in esp32s3_acm_tx_fifo_free()  argument
60 	u32 status = esp32s3_acm_read(port, USB_SERIAL_JTAG_EP1_CONF_REG);  in esp32s3_acm_tx_fifo_free()
65 static u32 esp32s3_acm_tx_fifo_cnt(struct uart_port *port)  in esp32s3_acm_tx_fifo_cnt()  argument
67 	u32 status = esp32s3_acm_read(port, USB_SERIAL_JTAG_IN_EP1_ST_REG);  in esp32s3_acm_tx_fifo_cnt()
72 static u32 esp32s3_acm_rx_fifo_cnt(struct uart_port *port)  in esp32s3_acm_rx_fifo_cnt()  argument
74 	u32 status = esp32s3_acm_read(port, USB_SERIAL_JTAG_OUT_EP1_ST_REG);  in esp32s3_acm_rx_fifo_cnt()
80 static unsigned int esp32s3_acm_tx_empty(struct uart_port *port)  in esp32s3_acm_tx_empty()  argument
82 	return esp32s3_acm_tx_fifo_cnt(port) == 0 ? TIOCSER_TEMT : 0;  in esp32s3_acm_tx_empty()
85 static void esp32s3_acm_set_mctrl(struct uart_port *port, unsigned int mctrl)  in esp32s3_acm_set_mctrl()  argument
89 static unsigned int esp32s3_acm_get_mctrl(struct uart_port *port)  in esp32s3_acm_get_mctrl()  argument
94 static void esp32s3_acm_stop_tx(struct uart_port *port)  in esp32s3_acm_stop_tx()  argument
98 	int_ena = esp32s3_acm_read(port, USB_SERIAL_JTAG_INT_ENA_REG);  in esp32s3_acm_stop_tx()
100 	esp32s3_acm_write(port, USB_SERIAL_JTAG_INT_ENA_REG, int_ena);  in esp32s3_acm_stop_tx()
103 static void esp32s3_acm_rxint(struct uart_port *port)  in esp32s3_acm_rxint()  argument
105 	struct tty_port *tty_port = &port->state->port;  in esp32s3_acm_rxint()
106 	u32 rx_fifo_cnt = esp32s3_acm_rx_fifo_cnt(port);  in esp32s3_acm_rxint()
113 	spin_lock_irqsave(&port->lock, flags);  in esp32s3_acm_rxint()
116 		u32 rx = esp32s3_acm_read(port, USB_SERIAL_JTAG_EP1_REG);  in esp32s3_acm_rxint()
118 		++port->icount.rx;  in esp32s3_acm_rxint()
121 	spin_unlock_irqrestore(&port->lock, flags);  in esp32s3_acm_rxint()
126 static void esp32s3_acm_push(struct uart_port *port)  in esp32s3_acm_push()  argument
128 	if (esp32s3_acm_tx_fifo_free(port))  in esp32s3_acm_push()
129 		esp32s3_acm_write(port, USB_SERIAL_JTAG_EP1_CONF_REG,  in esp32s3_acm_push()
133 static void esp32s3_acm_put_char(struct uart_port *port, u8 c)  in esp32s3_acm_put_char()  argument
135 	esp32s3_acm_write(port, USB_SERIAL_JTAG_EP1_REG, c);  in esp32s3_acm_put_char()
138 static void esp32s3_acm_put_char_sync(struct uart_port *port, u8 c)  in esp32s3_acm_put_char_sync()  argument
142 	while (!esp32s3_acm_tx_fifo_free(port)) {  in esp32s3_acm_put_char_sync()
144 			dev_warn(port->dev, "timeout waiting for TX FIFO\n");  in esp32s3_acm_put_char_sync()
149 	esp32s3_acm_put_char(port, c);  in esp32s3_acm_put_char_sync()
150 	esp32s3_acm_push(port);  in esp32s3_acm_put_char_sync()
153 static void esp32s3_acm_transmit_buffer(struct uart_port *port)  in esp32s3_acm_transmit_buffer()  argument
159 	if (!esp32s3_acm_tx_fifo_free(port))  in esp32s3_acm_transmit_buffer()
162 	tx_fifo_used = esp32s3_acm_tx_fifo_cnt(port);  in esp32s3_acm_transmit_buffer()
163 	pending = uart_port_tx_limited(port, ch,  in esp32s3_acm_transmit_buffer()
165 				       true, esp32s3_acm_put_char(port, ch),  in esp32s3_acm_transmit_buffer()
170 		int_ena = esp32s3_acm_read(port, USB_SERIAL_JTAG_INT_ENA_REG);  in esp32s3_acm_transmit_buffer()
172 		esp32s3_acm_write(port, USB_SERIAL_JTAG_INT_ENA_REG, int_ena);  in esp32s3_acm_transmit_buffer()
174 	esp32s3_acm_push(port);  in esp32s3_acm_transmit_buffer()
177 static void esp32s3_acm_txint(struct uart_port *port)  in esp32s3_acm_txint()  argument
179 	esp32s3_acm_transmit_buffer(port);  in esp32s3_acm_txint()
184 	struct uart_port *port = dev_id;  in esp32s3_acm_int()  local
187 	status = esp32s3_acm_read(port, USB_SERIAL_JTAG_INT_ST_REG);  in esp32s3_acm_int()
188 	esp32s3_acm_write(port, USB_SERIAL_JTAG_INT_CLR_REG, status);  in esp32s3_acm_int()
191 		esp32s3_acm_rxint(port);  in esp32s3_acm_int()
193 		esp32s3_acm_txint(port);  in esp32s3_acm_int()
198 static void esp32s3_acm_start_tx(struct uart_port *port)  in esp32s3_acm_start_tx()  argument
200 	esp32s3_acm_transmit_buffer(port);  in esp32s3_acm_start_tx()
203 static void esp32s3_acm_stop_rx(struct uart_port *port)  in esp32s3_acm_stop_rx()  argument
207 	int_ena = esp32s3_acm_read(port, USB_SERIAL_JTAG_INT_ENA_REG);  in esp32s3_acm_stop_rx()
209 	esp32s3_acm_write(port, USB_SERIAL_JTAG_INT_ENA_REG, int_ena);  in esp32s3_acm_stop_rx()
212 static int esp32s3_acm_startup(struct uart_port *port)  in esp32s3_acm_startup()  argument
216 	ret = request_irq(port->irq, esp32s3_acm_int, 0, DRIVER_NAME, port);  in esp32s3_acm_startup()
219 	esp32s3_acm_write(port, USB_SERIAL_JTAG_INT_ENA_REG,  in esp32s3_acm_startup()
225 static void esp32s3_acm_shutdown(struct uart_port *port)  in esp32s3_acm_shutdown()  argument
227 	esp32s3_acm_write(port, USB_SERIAL_JTAG_INT_ENA_REG, 0);  in esp32s3_acm_shutdown()
228 	free_irq(port->irq, port);  in esp32s3_acm_shutdown()
231 static void esp32s3_acm_set_termios(struct uart_port *port,  in esp32s3_acm_set_termios()  argument
237 static const char *esp32s3_acm_type(struct uart_port *port)  in esp32s3_acm_type()  argument
243 static void esp32s3_acm_config_port(struct uart_port *port, int flags)  in esp32s3_acm_config_port()  argument
246 		port->type = PORT_GENERIC;  in esp32s3_acm_config_port()
250 static void esp32s3_acm_poll_put_char(struct uart_port *port, unsigned char c)  in esp32s3_acm_poll_put_char()  argument
252 	esp32s3_acm_put_char_sync(port, c);  in esp32s3_acm_poll_put_char()
255 static int esp32s3_acm_poll_get_char(struct uart_port *port)  in esp32s3_acm_poll_get_char()  argument
257 	if (esp32s3_acm_rx_fifo_cnt(port))  in esp32s3_acm_poll_get_char()
258 		return esp32s3_acm_read(port, USB_SERIAL_JTAG_EP1_REG);  in esp32s3_acm_poll_get_char()
282 static void esp32s3_acm_string_write(struct uart_port *port, const char *s,  in esp32s3_acm_string_write()  argument
285 	uart_console_write(port, s, count, esp32s3_acm_put_char_sync);  in esp32s3_acm_string_write()
291 	struct uart_port *port = esp32s3_acm_ports[co->index];  in esp32s3_acm_console_write()  local
295 	if (port->sysrq)  in esp32s3_acm_console_write()
298 		locked = spin_trylock_irqsave(&port->lock, flags);  in esp32s3_acm_console_write()
300 		spin_lock_irqsave(&port->lock, flags);  in esp32s3_acm_console_write()
302 	esp32s3_acm_string_write(port, s, count);  in esp32s3_acm_console_write()
305 		spin_unlock_irqrestore(&port->lock, flags);  in esp32s3_acm_console_write()
323 	uart_console_write(&dev->port, s, n, esp32s3_acm_put_char_sync);  in esp32s3_acm_earlycon_write()
333 		int c = esp32s3_acm_poll_get_char(&dev->port);  in esp32s3_acm_earlycon_read()
346 	if (!device->port.membase)  in esp32s3_acm_early_console_setup()
370 	struct uart_port *port;  in esp32s3_acm_probe()  local
374 	port = devm_kzalloc(&pdev->dev, sizeof(*port), GFP_KERNEL);  in esp32s3_acm_probe()
375 	if (!port)  in esp32s3_acm_probe()
389 	port->line = ret;  in esp32s3_acm_probe()
395 	port->mapbase = res->start;  in esp32s3_acm_probe()
396 	port->membase = devm_ioremap_resource(&pdev->dev, res);  in esp32s3_acm_probe()
397 	if (IS_ERR(port->membase))  in esp32s3_acm_probe()
398 		return PTR_ERR(port->membase);  in esp32s3_acm_probe()
400 	port->dev = &pdev->dev;  in esp32s3_acm_probe()
401 	port->type = PORT_GENERIC;  in esp32s3_acm_probe()
402 	port->iotype = UPIO_MEM;  in esp32s3_acm_probe()
403 	port->irq = platform_get_irq(pdev, 0);  in esp32s3_acm_probe()
404 	port->ops = &esp32s3_acm_pops;  in esp32s3_acm_probe()
405 	port->flags = UPF_BOOT_AUTOCONF;  in esp32s3_acm_probe()
406 	port->has_sysrq = 1;  in esp32s3_acm_probe()
407 	port->fifosize = ESP32S3_ACM_TX_FIFO_SIZE;  in esp32s3_acm_probe()
409 	esp32s3_acm_ports[port->line] = port;  in esp32s3_acm_probe()
411 	platform_set_drvdata(pdev, port);  in esp32s3_acm_probe()
413 	return uart_add_one_port(&esp32s3_acm_reg, port);  in esp32s3_acm_probe()
418 	struct uart_port *port = platform_get_drvdata(pdev);  in esp32s3_acm_remove()  local
420 	uart_remove_one_port(&esp32s3_acm_reg, port);  in esp32s3_acm_remove()