1 // SPDX-License-Identifier: GPL-2.0
16 #include <xen/hvc-console.h>
17 #include <asm/pci-direct.h>
20 #include <linux/usb/xhci-dbgp.h>
34 	while ((c = *str++) != '\0' && n-- > 0) {  in early_vga_write()
45 			current_ypos = max_ypos-1;  in early_vga_write()
50 				current_xpos--;  in early_vga_write()
74 	.index =	-1,
110 static int early_serial_putc(unsigned char ch)  in early_serial_putc()  argument
114 	while ((serial_in(early_serial_base, LSR) & XMTRDY) == 0 && --timeout)  in early_serial_putc()
116 	serial_out(early_serial_base, TXR, ch);  in early_serial_putc()
117 	return timeout ? 0 : -1;  in early_serial_putc()
122 	while (*s && n-- > 0) {  in early_serial_write()
221 	u8 bus, slot, func;  in early_pci_serial_init()  local
252 	func = (u8)simple_strtoul(s, &e, 16);  in early_pci_serial_init()
262 	cmdreg = read_pci_config(bus, slot, func, PCI_COMMAND);  in early_pci_serial_init()
263 	classcode = read_pci_config(bus, slot, func, PCI_CLASS_REVISION);  in early_pci_serial_init()
264 	bar0 = read_pci_config(bus, slot, func, PCI_BASE_ADDRESS_0);  in early_pci_serial_init()
267 	 * Verify it is a 16550-UART type device  in early_pci_serial_init()
284 		write_pci_config(bus, slot, func, PCI_COMMAND,  in early_pci_serial_init()
287 		/* It is memory mapped - assume 32-bit alignment */  in early_pci_serial_init()
293 		write_pci_config(bus, slot, func, PCI_COMMAND,  in early_pci_serial_init()
324 	.index =	-1,
329 	if (con->index != -1) {  in early_console_register()
331 		       con->name);  in early_console_register()
336 		early_console->flags &= ~CON_BOOT;  in early_console_register()
338 		early_console->flags |= CON_BOOT;  in early_console_register()