1 // SPDX-License-Identifier: GPL-2.0+
3  *  Universal/legacy platform driver for 8250/16550-type serial ports
6  *	      ISA-compatible 8250/16550 ports
30  *                 This option is unsafe when used on edge-triggered interrupts.
41  * SERIAL_PORT_DFNS tells us about built-in ports that have no
84 		struct uart_port *port = &up->port;  in __serial8250_isa_init_ports()
86 		port->iobase   = old_serial_port[i].port;  in __serial8250_isa_init_ports()
87 		port->irq      = irq_canonicalize(old_serial_port[i].irq);  in __serial8250_isa_init_ports()
88 		port->irqflags = 0;  in __serial8250_isa_init_ports()
89 		port->uartclk  = old_serial_port[i].baud_base * 16;  in __serial8250_isa_init_ports()
90 		port->flags    = old_serial_port[i].flags;  in __serial8250_isa_init_ports()
91 		port->hub6     = 0;  in __serial8250_isa_init_ports()
92 		port->membase  = old_serial_port[i].iomem_base;  in __serial8250_isa_init_ports()
93 		port->iotype   = old_serial_port[i].io_type;  in __serial8250_isa_init_ports()
94 		port->regshift = old_serial_port[i].iomem_reg_shift;  in __serial8250_isa_init_ports()
96 		port->irqflags |= irqflag;  in __serial8250_isa_init_ports()
98 			serial8250_isa_config(i, &up->port, &up->capabilities);  in __serial8250_isa_init_ports()
112 	struct device *dev = &pdev->dev;  in serial8250_probe_acpi()
119 		return dev_err_probe(dev, -EINVAL, "no registers defined\n");  in serial8250_probe_acpi()
123 		uart.port.iobase = regs->start;  in serial8250_probe_acpi()
126 		uart.port.mapbase = regs->start;  in serial8250_probe_acpi()
131 		return -EINVAL;  in serial8250_probe_acpi()
137 	uart.port.dev = &pdev->dev;  in serial8250_probe_acpi()
141 	/* no interrupt -> fall back to polling */  in serial8250_probe_acpi()
142 	if (ret == -ENXIO)  in serial8250_probe_acpi()
164 	for (i = 0; p && p->flags != 0; p++, i++) {  in serial8250_probe_platform()
165 		uart.port.iobase	= p->iobase;  in serial8250_probe_platform()
166 		uart.port.membase	= p->membase;  in serial8250_probe_platform()
167 		uart.port.irq		= p->irq;  in serial8250_probe_platform()
168 		uart.port.irqflags	= p->irqflags;  in serial8250_probe_platform()
169 		uart.port.uartclk	= p->uartclk;  in serial8250_probe_platform()
170 		uart.port.regshift	= p->regshift;  in serial8250_probe_platform()
171 		uart.port.iotype	= p->iotype;  in serial8250_probe_platform()
172 		uart.port.flags		= p->flags;  in serial8250_probe_platform()
173 		uart.port.mapbase	= p->mapbase;  in serial8250_probe_platform()
174 		uart.port.mapsize	= p->mapsize;  in serial8250_probe_platform()
175 		uart.port.hub6		= p->hub6;  in serial8250_probe_platform()
176 		uart.port.has_sysrq	= p->has_sysrq;  in serial8250_probe_platform()
177 		uart.port.private_data	= p->private_data;  in serial8250_probe_platform()
178 		uart.port.type		= p->type;  in serial8250_probe_platform()
179 		uart.bugs		= p->bugs;  in serial8250_probe_platform()
180 		uart.port.serial_in	= p->serial_in;  in serial8250_probe_platform()
181 		uart.port.serial_out	= p->serial_out;  in serial8250_probe_platform()
182 		uart.dl_read		= p->dl_read;  in serial8250_probe_platform()
183 		uart.dl_write		= p->dl_write;  in serial8250_probe_platform()
184 		uart.port.handle_irq	= p->handle_irq;  in serial8250_probe_platform()
185 		uart.port.handle_break	= p->handle_break;  in serial8250_probe_platform()
186 		uart.port.set_termios	= p->set_termios;  in serial8250_probe_platform()
187 		uart.port.set_ldisc	= p->set_ldisc;  in serial8250_probe_platform()
188 		uart.port.get_mctrl	= p->get_mctrl;  in serial8250_probe_platform()
189 		uart.port.pm		= p->pm;  in serial8250_probe_platform()
190 		uart.port.dev		= &dev->dev;  in serial8250_probe_platform()
194 			dev_err(&dev->dev, "unable to register port at index %d "  in serial8250_probe_platform()
196 				p->iobase, (unsigned long long)p->mapbase,  in serial8250_probe_platform()
197 				p->irq, ret);  in serial8250_probe_platform()
204  * Register a set of serial devices attached to a platform device.
210 	struct device *dev = &pdev->dev;  in serial8250_probe()
238 		if (up->port.dev == &dev->dev)  in serial8250_remove()
250 		if (up->port.type != PORT_UNKNOWN && up->port.dev == &dev->dev)  in serial8250_suspend()
251 			uart_suspend_port(&serial8250_reg, &up->port);  in serial8250_suspend()
264 		if (up->port.type != PORT_UNKNOWN && up->port.dev == &dev->dev)  in serial8250_resume()
272 	{ "RSCV0003" }, /* RISC-V Generic 16550A UART */
289  * This "device" covers _all_ ISA 8250-compatible serial devices listed
299 		return -ENODEV;  in serial8250_init()
321 		ret = -ENOMEM;  in serial8250_init()
329 	serial8250_register_ports(&serial8250_reg, &serial8250_isa_devs->dev);  in serial8250_init()
356 	 * This tells serial8250_unregister_port() not to re-register  in serial8250_exit()
357 	 * the ports (thereby making serial8250_isa_driver permanently  in serial8250_exit()
379 MODULE_PARM_DESC(share_irqs, "Share IRQs with other non-8250/16x50 devices (unsafe)");
382 MODULE_PARM_DESC(nr_uarts, "Maximum number of UARTs supported. (1-" __MODULE_STRING(CONFIG_SERIAL_8…