1 // SPDX-License-Identifier: GPL-2.0-only
10 #include <linux/reboot.h>
20 #include <asm/emergency-restart.h>
25  * intention to reset, reboot or power off the system. This 8051 device has
36 static unsigned int mem_serial_in(struct uart_port *p, int offset)  in mem_serial_in()  argument
38 	offset = offset << p->regshift;  in mem_serial_in()
39 	return readl(p->membase + offset);  in mem_serial_in()
49  * errata number 9 in Errata - B step.
52 static unsigned int ce4100_mem_serial_in(struct uart_port *p, int offset)  in ce4100_mem_serial_in()  argument
56 	if (offset == UART_IIR) {  in ce4100_mem_serial_in()
57 		offset = offset << p->regshift;  in ce4100_mem_serial_in()
58 		ret = readl(p->membase + offset);  in ce4100_mem_serial_in()
72 		ret =  mem_serial_in(p, offset);  in ce4100_mem_serial_in()
76 static void ce4100_mem_serial_out(struct uart_port *p, int offset, int value)  in ce4100_mem_serial_out()  argument
78 	offset = offset << p->regshift;  in ce4100_mem_serial_out()
79 	writel(value, p->membase + offset);  in ce4100_mem_serial_out()
91 	if (up->iotype !=  UPIO_MEM32) {  in ce4100_serial_fixup()
92 		up->uartclk  = 14745600;  in ce4100_serial_fixup()
93 		up->mapbase = 0xdffe0200;  in ce4100_serial_fixup()
95 				up->mapbase & PAGE_MASK);  in ce4100_serial_fixup()
96 		up->membase =  in ce4100_serial_fixup()
98 		up->membase += up->mapbase & ~PAGE_MASK;  in ce4100_serial_fixup()
99 		up->mapbase += port * 0x100;  in ce4100_serial_fixup()
100 		up->membase += port * 0x100;  in ce4100_serial_fixup()
101 		up->iotype   = UPIO_MEM32;  in ce4100_serial_fixup()
102 		up->regshift = 2;  in ce4100_serial_fixup()
103 		up->irq = 4;  in ce4100_serial_fixup()
106 	up->iobase = 0;  in ce4100_serial_fixup()
107 	up->serial_in = ce4100_mem_serial_in;  in ce4100_serial_fixup()
108 	up->serial_out = ce4100_mem_serial_out;  in ce4100_serial_fixup()
146 	 * By default, the reboot method is ACPI which is supported by the  in x86_ce4100_early_setup()
149 	 * reboot. By using BOOT_KBD we ensure proper system reboot as  in x86_ce4100_early_setup()