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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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61 lines
1.5 KiB
C
61 lines
1.5 KiB
C
/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 2007 Ralf Baechle (ralf@linux-mips.org)
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*/
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/serial_8250.h>
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#include <asm/jazz.h>
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/*
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* Confusion ... It seems the original Microsoft Jazz machine used to have a
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* 4.096MHz clock for its UART while the MIPS Magnum and Millenium systems
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* had 8MHz. The Olivetti M700-10 and the Acer PICA have 1.8432MHz like PCs.
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*/
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#ifdef CONFIG_OLIVETTI_M700
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#define JAZZ_BASE_BAUD 1843200
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#else
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#define JAZZ_BASE_BAUD 8000000 /* 3072000 */
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#endif
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#define JAZZ_UART_FLAGS (UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_IOREMAP)
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#define JAZZ_PORT(base, int) \
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{ \
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.mapbase = base, \
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.irq = int, \
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.uartclk = JAZZ_BASE_BAUD, \
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.iotype = UPIO_MEM, \
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.flags = JAZZ_UART_FLAGS, \
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.regshift = 0, \
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}
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static struct plat_serial8250_port uart8250_data[] = {
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JAZZ_PORT(JAZZ_SERIAL1_BASE, JAZZ_SERIAL1_IRQ),
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JAZZ_PORT(JAZZ_SERIAL2_BASE, JAZZ_SERIAL2_IRQ),
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{ },
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};
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static struct platform_device uart8250_device = {
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.name = "serial8250",
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.id = PLAT8250_DEV_PLATFORM,
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.dev = {
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.platform_data = uart8250_data,
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},
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};
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static int __init uart8250_init(void)
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{
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return platform_device_register(&uart8250_device);
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}
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module_init(uart8250_init);
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MODULE_AUTHOR("Ralf Baechle <ralf@linux-mips.org>");
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("8250 UART probe driver for the Jazz family");
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