1 // SPDX-License-Identifier: GPL-2.0
16 #include <asm/pci-bridge.h>
17 #include <asm/ppc-pci.h>
43 	{.type = "tsi-bridge",},
46 	{.compatible = "simple-bus",},
47 	{.compatible = "wrs,epld-localbus",},
52 static int legacy_serial_console = -1;
60 	offset = offset << p->regshift;  in tsi_serial_in()
62 		tmp = readl(p->membase + (UART_IIR & ~3));  in tsi_serial_in()
65 		return readb(p->membase + offset);  in tsi_serial_in()
70 	offset = offset << p->regshift;  in tsi_serial_out()
72 		writeb(value, p->membase + offset);  in tsi_serial_out()
86 	clk = of_get_property(np, "clock-frequency", NULL);  in add_legacy_port()
91 	spd = of_get_property(np, "current-speed", NULL);  in add_legacy_port()
94 	rs = of_get_property(np, "reg-shift", NULL);  in add_legacy_port()
109 		return -1;  in add_legacy_port()
117 			printk(KERN_DEBUG "Moved legacy port %d -> %d\n",  in add_legacy_port()
172 	 * encoded in the device-tree.  in add_legacy_soc_port()
174 	if (!of_property_present(np, "clock-frequency"))  in add_legacy_soc_port()
175 		return -1;  in add_legacy_soc_port()
177 	/* if reg-offset don't try to use it */  in add_legacy_soc_port()
178 	if (of_property_present(np, "reg-offset"))  in add_legacy_soc_port()
179 		return -1;  in add_legacy_soc_port()
181 	/* if rtas uses this device, don't try to use it as well */  in add_legacy_soc_port()
182 	if (of_property_read_bool(np, "used-by-rtas"))  in add_legacy_soc_port()
183 		return -1;  in add_legacy_soc_port()
188 		return -1;  in add_legacy_soc_port()
192 		return -1;  in add_legacy_soc_port()
197 	if (of_node_is_type(tsi, "tsi-bridge"))  in add_legacy_soc_port()
198 		return add_legacy_port(np, -1, UPIO_TSI, addr, addr,  in add_legacy_soc_port()
201 		return add_legacy_port(np, -1, UPIO_MEM, addr, addr,  in add_legacy_soc_port()
210 	int index = -1;  in add_legacy_isa_port()
213 	DBG(" -> add_legacy_isa_port(%pOF)\n", np);  in add_legacy_isa_port()
218 		return -1;  in add_legacy_isa_port()
222 		return -1;  in add_legacy_isa_port()
224 	/* Now look for an "ibm,aix-loc" property that gives us ordering  in add_legacy_isa_port()
227 	typep = of_get_property(np, "ibm,aix-loc", NULL);  in add_legacy_isa_port()
231 		index = simple_strtol(typep+1, NULL, 0) - 1;  in add_legacy_isa_port()
235 	 * port later by the serial driver  in add_legacy_isa_port()
239 	if (!of_device_is_compatible(isa_brg, "ibm,power8-lpc") ||  in add_legacy_isa_port()
260 	int iotype, index = -1, lindex = 0;  in add_legacy_pci_port()
262 	DBG(" -> add_legacy_pci_port(%pOF)\n", np);  in add_legacy_pci_port()
265 	 * encoded in the device-tree (that is have an fcode). Anything  in add_legacy_pci_port()
266 	 * else can't be used that early and will be normally probed by  in add_legacy_pci_port()
271 	if (!of_property_present(np, "clock-frequency"))  in add_legacy_pci_port()
272 		return -1;  in add_legacy_pci_port()
277 		return -1;  in add_legacy_pci_port()
283 		return -1;  in add_legacy_pci_port()
332 	stride = 1 << port->regshift;  in setup_legacy_serial_console()
335 	if (info->taddr) {  in setup_legacy_serial_console()
336 		info->early_addr = early_ioremap(info->taddr, 0x1000);  in setup_legacy_serial_console()
337 		if (info->early_addr == NULL)  in setup_legacy_serial_console()
339 		udbg_uart_init_mmio(info->early_addr, stride);  in setup_legacy_serial_console()
342 		if (port->iotype == UPIO_PORT && isa_io_special)  in setup_legacy_serial_console()
343 			udbg_uart_init_pio(port->iobase, stride);  in setup_legacy_serial_console()
349 	if (info->speed == 0)  in setup_legacy_serial_console()
350 		info->speed = udbg_probe_uart_speed(info->clock);  in setup_legacy_serial_console()
353 	DBG("default console speed = %d\n", info->speed);  in setup_legacy_serial_console()
354 	udbg_uart_setup(info->speed, info->clock);  in setup_legacy_serial_console()
369 	if (!info->early_addr)  in ioremap_legacy_serial_console()
372 	vaddr = ioremap(info->taddr, 0x1000);  in ioremap_legacy_serial_console()
374 		return -ENOMEM;  in ioremap_legacy_serial_console()
376 	udbg_uart_init_mmio(vaddr, 1 << port->regshift);  in ioremap_legacy_serial_console()
377 	early_iounmap(info->early_addr, 0x1000);  in ioremap_legacy_serial_console()
378 	info->early_addr = NULL;  in ioremap_legacy_serial_console()
387  * will try to build a list of all the available 8250-compatible serial ports
388  * in the machine using the Open Firmware device-tree. It currently only deals
390  * console to be initialized, that list is also used later to provide 8250 with
391  * the machine non-PCI ports and to properly pick the default console port
399 	DBG(" -> find_legacy_serial_port()\n");  in find_legacy_serial_ports()
402 	path = of_get_property(of_chosen, "linux,stdout-path", NULL);  in find_legacy_serial_ports()
404 		path = of_get_property(of_chosen, "stdout-path", NULL);  in find_legacy_serial_ports()
410 		DBG(" no linux,stdout-path !\n");  in find_legacy_serial_ports()
479 	DBG(" <- find_legacy_serial_port()\n");  in find_legacy_serial_ports()
509 	port->irq = virq;  in fixup_port_irq()
514 			port->handle_irq = fsl8250_handle_irq;  in fixup_port_irq()
515 			port->has_sysrq = IS_ENABLED(CONFIG_SERIAL_8250_CONSOLE);  in fixup_port_irq()
534 		unsigned long offset = (unsigned long)hose->io_base_virt -  in fixup_port_pio()
540 		DBG("port %d, IO %lx -> %lx\n",  in fixup_port_pio()
541 		    index, port->iobase, port->iobase + offset);  in fixup_port_pio()
542 		port->iobase += offset;  in fixup_port_pio()
553 	port->membase = ioremap(port->mapbase, 0x100);  in fixup_port_mmio()
566  * registers all those platform ports for use by the 8250 driver when it
574 		return -ENODEV;  in serial_dev_init()
586 		if (!port->irq)  in serial_dev_init()
588 		if (port->iotype == UPIO_PORT)  in serial_dev_init()
590 		if ((port->iotype == UPIO_MEM) || (port->iotype == UPIO_TSI))  in serial_dev_init()
607  * been probed earlier by find_legacy_serial_ports()
616 	DBG(" -> check_legacy_serial_console()\n");  in check_legacy_serial_console()
621 		return -EBUSY;  in check_legacy_serial_console()
626 		return -ENODEV;  in check_legacy_serial_console()
631 		return -ENODEV;  in check_legacy_serial_console()
635 	name = of_get_property(of_chosen, "linux,stdout-path", NULL);  in check_legacy_serial_console()
637 		name = of_get_property(of_chosen, "stdout-path", NULL);  in check_legacy_serial_console()
639 		DBG(" no stdout-path !\n");  in check_legacy_serial_console()
640 		return -ENODEV;  in check_legacy_serial_console()
645 		return -ENODEV;  in check_legacy_serial_console()
654 	spd = of_get_property(prom_stdout, "current-speed", NULL);  in check_legacy_serial_console()
686 	return -ENODEV;  in check_legacy_serial_console()