cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

8250_gsc.c (3825B)

      1// SPDX-License-Identifier: GPL-2.0+
      2/*
      3 *	Serial Device Initialisation for Lasi/Asp/Wax/Dino
      4 *
      5 *	(c) Copyright Matthew Wilcox <willy@debian.org> 2001-2002
      6 */
      7
      8#include <linux/errno.h>
      9#include <linux/init.h>
     10#include <linux/interrupt.h>
     11#include <linux/ioport.h>
     12#include <linux/module.h>
     13#include <linux/serial_core.h>
     14#include <linux/signal.h>
     15#include <linux/types.h>
     16
     17#include <asm/hardware.h>
     18#include <asm/parisc-device.h>
     19#include <asm/io.h>
     20
     21#include "8250.h"
     22
     23static int __init serial_init_chip(struct parisc_device *dev)
     24{
     25	struct uart_8250_port uart;
     26	unsigned long address;
     27	int err;
     28
     29#if defined(CONFIG_64BIT) && defined(CONFIG_IOSAPIC)
     30	if (!dev->irq && (dev->id.sversion == 0xad))
     31		dev->irq = iosapic_serial_irq(dev);
     32#endif
     33
     34	if (!dev->irq) {
     35		/* We find some unattached serial ports by walking native
     36		 * busses.  These should be silently ignored.  Otherwise,
     37		 * what we have here is a missing parent device, so tell
     38		 * the user what they're missing.
     39		 */
     40		if (parisc_parent(dev)->id.hw_type != HPHW_IOA)
     41			dev_info(&dev->dev,
     42				"Serial: device 0x%llx not configured.\n"
     43				"Enable support for Wax, Lasi, Asp or Dino.\n",
     44				(unsigned long long)dev->hpa.start);
     45		return -ENODEV;
     46	}
     47
     48	address = dev->hpa.start;
     49	if (dev->id.sversion != 0x8d)
     50		address += 0x800;
     51
     52	memset(&uart, 0, sizeof(uart));
     53	uart.port.iotype	= UPIO_MEM;
     54	/* 7.272727MHz on Lasi.  Assumed the same for Dino, Wax and Timi. */
     55	uart.port.uartclk	= (dev->id.sversion != 0xad) ?
     56					7272727 : 1843200;
     57	uart.port.mapbase	= address;
     58	uart.port.membase	= ioremap(address, 16);
     59	if (!uart.port.membase) {
     60		dev_warn(&dev->dev, "Failed to map memory\n");
     61		return -ENOMEM;
     62	}
     63	uart.port.irq	= dev->irq;
     64	uart.port.flags	= UPF_BOOT_AUTOCONF;
     65	uart.port.dev	= &dev->dev;
     66
     67	err = serial8250_register_8250_port(&uart);
     68	if (err < 0) {
     69		dev_warn(&dev->dev,
     70			"serial8250_register_8250_port returned error %d\n",
     71			err);
     72		iounmap(uart.port.membase);
     73		return err;
     74	}
     75
     76	return 0;
     77}
     78
     79static const struct parisc_device_id serial_tbl[] __initconst = {
     80	{ HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x00075 },
     81	{ HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x0008c },
     82	{ HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x0008d },
     83	{ HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x000ad },
     84	{ 0 }
     85};
     86
     87/* Hack.  Some machines have SERIAL_0 attached to Lasi and SERIAL_1
     88 * attached to Dino.  Unfortunately, Dino appears before Lasi in the device
     89 * tree.  To ensure that ttyS0 == SERIAL_0, we register two drivers; one
     90 * which only knows about Lasi and then a second which will find all the
     91 * other serial ports.  HPUX ignores this problem.
     92 */
     93static const struct parisc_device_id lasi_tbl[] __initconst = {
     94	{ HPHW_FIO, HVERSION_REV_ANY_ID, 0x03B, 0x0008C }, /* C1xx/C1xxL */
     95	{ HPHW_FIO, HVERSION_REV_ANY_ID, 0x03C, 0x0008C }, /* B132L */
     96	{ HPHW_FIO, HVERSION_REV_ANY_ID, 0x03D, 0x0008C }, /* B160L */
     97	{ HPHW_FIO, HVERSION_REV_ANY_ID, 0x03E, 0x0008C }, /* B132L+ */
     98	{ HPHW_FIO, HVERSION_REV_ANY_ID, 0x03F, 0x0008C }, /* B180L+ */
     99	{ HPHW_FIO, HVERSION_REV_ANY_ID, 0x046, 0x0008C }, /* Rocky2 120 */
    100	{ HPHW_FIO, HVERSION_REV_ANY_ID, 0x047, 0x0008C }, /* Rocky2 150 */
    101	{ HPHW_FIO, HVERSION_REV_ANY_ID, 0x04E, 0x0008C }, /* Kiji L2 132 */
    102	{ HPHW_FIO, HVERSION_REV_ANY_ID, 0x056, 0x0008C }, /* Raven+ */
    103	{ 0 }
    104};
    105
    106
    107MODULE_DEVICE_TABLE(parisc, serial_tbl);
    108
    109static struct parisc_driver lasi_driver __refdata = {
    110	.name		= "serial_1",
    111	.id_table	= lasi_tbl,
    112	.probe		= serial_init_chip,
    113};
    114
    115static struct parisc_driver serial_driver __refdata = {
    116	.name		= "serial",
    117	.id_table	= serial_tbl,
    118	.probe		= serial_init_chip,
    119};
    120
    121static int __init probe_serial_gsc(void)
    122{
    123	register_parisc_driver(&lasi_driver);
    124	register_parisc_driver(&serial_driver);
    125	return 0;
    126}
    127
    128module_init(probe_serial_gsc);
    129
    130MODULE_LICENSE("GPL");