mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-28 20:02:17 +00:00
![Greg Kroah-Hartman](/assets/img/avatar_default.png)
It's good to have SPDX identifiers in all files to make it easier to audit the kernel tree for correct licenses. Update the drivers/tty files files with the correct SPDX license identifier based on the license text in the file itself. The SPDX identifier is a legally binding shorthand, which can be used instead of the full boiler plate text. This work is based on a script and data from Thomas Gleixner, Philippe Ombredanne, and Kate Stewart. Cc: Jiri Slaby <jslaby@suse.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Chris Metcalf <cmetcalf@mellanox.com> Cc: Jiri Kosina <jikos@kernel.org> Cc: David Sterba <dsterba@suse.com> Cc: James Hogan <jhogan@kernel.org> Cc: Rob Herring <robh@kernel.org> Cc: Eric Anholt <eric@anholt.net> Cc: Stefan Wahren <stefan.wahren@i2se.com> Cc: Florian Fainelli <f.fainelli@gmail.com> Cc: Ray Jui <rjui@broadcom.com> Cc: Scott Branden <sbranden@broadcom.com> Cc: bcm-kernel-feedback-list@broadcom.com Cc: "James E.J. Bottomley" <jejb@parisc-linux.org> Cc: Helge Deller <deller@gmx.de> Cc: Joachim Eastwood <manabian@gmail.com> Cc: Matthias Brugger <matthias.bgg@gmail.com> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Tobias Klauser <tklauser@distanz.ch> Cc: Russell King <linux@armlinux.org.uk> Cc: Vineet Gupta <vgupta@synopsys.com> Cc: Richard Genoud <richard.genoud@gmail.com> Cc: Alexander Shiyan <shc_work@mail.ru> Cc: Baruch Siach <baruch@tkos.co.il> Cc: "Maciej W. Rozycki" <macro@linux-mips.org> Cc: "Uwe Kleine-König" <kernel@pengutronix.de> Cc: Pat Gefre <pfg@sgi.com> Cc: "Guilherme G. Piccoli" <gpiccoli@linux.vnet.ibm.com> Cc: Jason Wessel <jason.wessel@windriver.com> Cc: Vladimir Zapolskiy <vz@mleia.com> Cc: Sylvain Lemieux <slemieux.tyco@gmail.com> Cc: Carlo Caione <carlo@caione.org> Cc: Kevin Hilman <khilman@baylibre.com> Cc: Liviu Dudau <liviu.dudau@arm.com> Cc: Sudeep Holla <sudeep.holla@arm.com> Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Cc: Andy Gross <andy.gross@linaro.org> Cc: David Brown <david.brown@linaro.org> Cc: "Andreas Färber" <afaerber@suse.de> Cc: Kevin Cernekee <cernekee@gmail.com> Cc: Laxman Dewangan <ldewangan@nvidia.com> Cc: Thierry Reding <thierry.reding@gmail.com> Cc: Jonathan Hunter <jonathanh@nvidia.com> Cc: Barry Song <baohua@kernel.org> Cc: Patrice Chotard <patrice.chotard@st.com> Cc: Maxime Coquelin <mcoquelin.stm32@gmail.com> Cc: Alexandre Torgue <alexandre.torgue@st.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Peter Korsgaard <jacmet@sunsite.dk> Cc: Timur Tabi <timur@tabi.org> Cc: Tony Prisk <linux@prisktech.co.nz> Cc: Michal Simek <michal.simek@xilinx.com> Cc: "Sören Brinkmann" <soren.brinkmann@xilinx.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Kate Stewart <kstewart@linuxfoundation.org> Cc: Philippe Ombredanne <pombredanne@nexb.com> Cc: Jiri Slaby <jslaby@suse.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
324 lines
7.4 KiB
C
324 lines
7.4 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* Driver for the 98626/98644/internal serial interface on hp300/hp400
|
|
* (based on the National Semiconductor INS8250/NS16550AF/WD16C552 UARTs)
|
|
*
|
|
* Ported from 2.2 and modified to use the normal 8250 driver
|
|
* by Kars de Jong <jongk@linux-m68k.org>, May 2004.
|
|
*/
|
|
#include <linux/module.h>
|
|
#include <linux/init.h>
|
|
#include <linux/string.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/serial.h>
|
|
#include <linux/serial_8250.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/dio.h>
|
|
#include <linux/console.h>
|
|
#include <linux/slab.h>
|
|
#include <asm/io.h>
|
|
|
|
#include "8250.h"
|
|
|
|
#if !defined(CONFIG_HPDCA) && !defined(CONFIG_HPAPCI) && !defined(CONFIG_COMPILE_TEST)
|
|
#warning CONFIG_SERIAL_8250 defined but neither CONFIG_HPDCA nor CONFIG_HPAPCI defined, are you sure?
|
|
#endif
|
|
|
|
#ifdef CONFIG_HPAPCI
|
|
struct hp300_port {
|
|
struct hp300_port *next; /* next port */
|
|
int line; /* line (tty) number */
|
|
};
|
|
|
|
static struct hp300_port *hp300_ports;
|
|
#endif
|
|
|
|
#ifdef CONFIG_HPDCA
|
|
|
|
static int hpdca_init_one(struct dio_dev *d,
|
|
const struct dio_device_id *ent);
|
|
static void hpdca_remove_one(struct dio_dev *d);
|
|
|
|
static struct dio_device_id hpdca_dio_tbl[] = {
|
|
{ DIO_ID_DCA0 },
|
|
{ DIO_ID_DCA0REM },
|
|
{ DIO_ID_DCA1 },
|
|
{ DIO_ID_DCA1REM },
|
|
{ 0 }
|
|
};
|
|
|
|
static struct dio_driver hpdca_driver = {
|
|
.name = "hpdca",
|
|
.id_table = hpdca_dio_tbl,
|
|
.probe = hpdca_init_one,
|
|
.remove = hpdca_remove_one,
|
|
};
|
|
|
|
#endif
|
|
|
|
static unsigned int num_ports;
|
|
|
|
extern int hp300_uart_scode;
|
|
|
|
/* Offset to UART registers from base of DCA */
|
|
#define UART_OFFSET 17
|
|
|
|
#define DCA_ID 0x01 /* ID (read), reset (write) */
|
|
#define DCA_IC 0x03 /* Interrupt control */
|
|
|
|
/* Interrupt control */
|
|
#define DCA_IC_IE 0x80 /* Master interrupt enable */
|
|
|
|
#define HPDCA_BAUD_BASE 153600
|
|
|
|
/* Base address of the Frodo part */
|
|
#define FRODO_BASE (0x41c000)
|
|
|
|
/*
|
|
* Where we find the 8250-like APCI ports, and how far apart they are.
|
|
*/
|
|
#define FRODO_APCIBASE 0x0
|
|
#define FRODO_APCISPACE 0x20
|
|
#define FRODO_APCI_OFFSET(x) (FRODO_APCIBASE + ((x) * FRODO_APCISPACE))
|
|
|
|
#define HPAPCI_BAUD_BASE 500400
|
|
|
|
#ifdef CONFIG_SERIAL_8250_CONSOLE
|
|
/*
|
|
* Parse the bootinfo to find descriptions for headless console and
|
|
* debug serial ports and register them with the 8250 driver.
|
|
*/
|
|
int __init hp300_setup_serial_console(void)
|
|
{
|
|
int scode;
|
|
struct uart_port port;
|
|
|
|
memset(&port, 0, sizeof(port));
|
|
|
|
if (hp300_uart_scode < 0 || hp300_uart_scode > DIO_SCMAX)
|
|
return 0;
|
|
|
|
if (DIO_SCINHOLE(hp300_uart_scode))
|
|
return 0;
|
|
|
|
scode = hp300_uart_scode;
|
|
|
|
/* Memory mapped I/O */
|
|
port.iotype = UPIO_MEM;
|
|
port.flags = UPF_SKIP_TEST | UPF_SHARE_IRQ | UPF_BOOT_AUTOCONF;
|
|
port.type = PORT_UNKNOWN;
|
|
|
|
/* Check for APCI console */
|
|
if (scode == 256) {
|
|
#ifdef CONFIG_HPAPCI
|
|
pr_info("Serial console is HP APCI 1\n");
|
|
|
|
port.uartclk = HPAPCI_BAUD_BASE * 16;
|
|
port.mapbase = (FRODO_BASE + FRODO_APCI_OFFSET(1));
|
|
port.membase = (char *)(port.mapbase + DIO_VIRADDRBASE);
|
|
port.regshift = 2;
|
|
add_preferred_console("ttyS", port.line, "9600n8");
|
|
#else
|
|
pr_warn("Serial console is APCI but support is disabled (CONFIG_HPAPCI)!\n");
|
|
return 0;
|
|
#endif
|
|
} else {
|
|
#ifdef CONFIG_HPDCA
|
|
unsigned long pa = dio_scodetophysaddr(scode);
|
|
if (!pa)
|
|
return 0;
|
|
|
|
pr_info("Serial console is HP DCA at select code %d\n", scode);
|
|
|
|
port.uartclk = HPDCA_BAUD_BASE * 16;
|
|
port.mapbase = (pa + UART_OFFSET);
|
|
port.membase = (char *)(port.mapbase + DIO_VIRADDRBASE);
|
|
port.regshift = 1;
|
|
port.irq = DIO_IPL(pa + DIO_VIRADDRBASE);
|
|
|
|
/* Enable board-interrupts */
|
|
out_8(pa + DIO_VIRADDRBASE + DCA_IC, DCA_IC_IE);
|
|
|
|
if (DIO_ID(pa + DIO_VIRADDRBASE) & 0x80)
|
|
add_preferred_console("ttyS", port.line, "9600n8");
|
|
#else
|
|
pr_warn("Serial console is DCA but support is disabled (CONFIG_HPDCA)!\n");
|
|
return 0;
|
|
#endif
|
|
}
|
|
|
|
if (early_serial_setup(&port) < 0)
|
|
pr_warn("%s: early_serial_setup() failed.\n", __func__);
|
|
return 0;
|
|
}
|
|
#endif /* CONFIG_SERIAL_8250_CONSOLE */
|
|
|
|
#ifdef CONFIG_HPDCA
|
|
static int hpdca_init_one(struct dio_dev *d,
|
|
const struct dio_device_id *ent)
|
|
{
|
|
struct uart_8250_port uart;
|
|
int line;
|
|
|
|
#ifdef CONFIG_SERIAL_8250_CONSOLE
|
|
if (hp300_uart_scode == d->scode) {
|
|
/* Already got it. */
|
|
return 0;
|
|
}
|
|
#endif
|
|
memset(&uart, 0, sizeof(uart));
|
|
|
|
/* Memory mapped I/O */
|
|
uart.port.iotype = UPIO_MEM;
|
|
uart.port.flags = UPF_SKIP_TEST | UPF_SHARE_IRQ | UPF_BOOT_AUTOCONF;
|
|
uart.port.irq = d->ipl;
|
|
uart.port.uartclk = HPDCA_BAUD_BASE * 16;
|
|
uart.port.mapbase = (d->resource.start + UART_OFFSET);
|
|
uart.port.membase = (char *)(uart.port.mapbase + DIO_VIRADDRBASE);
|
|
uart.port.regshift = 1;
|
|
uart.port.dev = &d->dev;
|
|
line = serial8250_register_8250_port(&uart);
|
|
|
|
if (line < 0) {
|
|
dev_notice(&d->dev,
|
|
"8250_hp300: register_serial() DCA scode %d irq %d failed\n",
|
|
d->scode, uart.port.irq);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
/* Enable board-interrupts */
|
|
out_8(d->resource.start + DIO_VIRADDRBASE + DCA_IC, DCA_IC_IE);
|
|
dio_set_drvdata(d, (void *)line);
|
|
|
|
/* Reset the DCA */
|
|
out_8(d->resource.start + DIO_VIRADDRBASE + DCA_ID, 0xff);
|
|
udelay(100);
|
|
|
|
num_ports++;
|
|
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
static int __init hp300_8250_init(void)
|
|
{
|
|
static int called;
|
|
#ifdef CONFIG_HPAPCI
|
|
int line;
|
|
unsigned long base;
|
|
struct uart_8250_port uart;
|
|
struct hp300_port *port;
|
|
int i;
|
|
#endif
|
|
if (called)
|
|
return -ENODEV;
|
|
called = 1;
|
|
|
|
if (!MACH_IS_HP300)
|
|
return -ENODEV;
|
|
|
|
#ifdef CONFIG_HPDCA
|
|
dio_register_driver(&hpdca_driver);
|
|
#endif
|
|
#ifdef CONFIG_HPAPCI
|
|
if (hp300_model < HP_400) {
|
|
if (!num_ports)
|
|
return -ENODEV;
|
|
return 0;
|
|
}
|
|
/* These models have the Frodo chip.
|
|
* Port 0 is reserved for the Apollo Domain keyboard.
|
|
* Port 1 is either the console or the DCA.
|
|
*/
|
|
for (i = 1; i < 4; i++) {
|
|
/* Port 1 is the console on a 425e, on other machines it's
|
|
* mapped to DCA.
|
|
*/
|
|
#ifdef CONFIG_SERIAL_8250_CONSOLE
|
|
if (i == 1)
|
|
continue;
|
|
#endif
|
|
|
|
/* Create new serial device */
|
|
port = kmalloc(sizeof(struct hp300_port), GFP_KERNEL);
|
|
if (!port)
|
|
return -ENOMEM;
|
|
|
|
memset(&uart, 0, sizeof(uart));
|
|
|
|
base = (FRODO_BASE + FRODO_APCI_OFFSET(i));
|
|
|
|
/* Memory mapped I/O */
|
|
uart.port.iotype = UPIO_MEM;
|
|
uart.port.flags = UPF_SKIP_TEST | UPF_SHARE_IRQ
|
|
| UPF_BOOT_AUTOCONF;
|
|
/* XXX - no interrupt support yet */
|
|
uart.port.irq = 0;
|
|
uart.port.uartclk = HPAPCI_BAUD_BASE * 16;
|
|
uart.port.mapbase = base;
|
|
uart.port.membase = (char *)(base + DIO_VIRADDRBASE);
|
|
uart.port.regshift = 2;
|
|
|
|
line = serial8250_register_8250_port(&uart);
|
|
|
|
if (line < 0) {
|
|
dev_notice(uart.port.dev,
|
|
"8250_hp300: register_serial() APCI %d irq %d failed\n",
|
|
i, uart.port.irq);
|
|
kfree(port);
|
|
continue;
|
|
}
|
|
|
|
port->line = line;
|
|
port->next = hp300_ports;
|
|
hp300_ports = port;
|
|
|
|
num_ports++;
|
|
}
|
|
#endif
|
|
|
|
/* Any boards found? */
|
|
if (!num_ports)
|
|
return -ENODEV;
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_HPDCA
|
|
static void hpdca_remove_one(struct dio_dev *d)
|
|
{
|
|
int line;
|
|
|
|
line = (int) dio_get_drvdata(d);
|
|
if (d->resource.start) {
|
|
/* Disable board-interrupts */
|
|
out_8(d->resource.start + DIO_VIRADDRBASE + DCA_IC, 0);
|
|
}
|
|
serial8250_unregister_port(line);
|
|
}
|
|
#endif
|
|
|
|
static void __exit hp300_8250_exit(void)
|
|
{
|
|
#ifdef CONFIG_HPAPCI
|
|
struct hp300_port *port, *to_free;
|
|
|
|
for (port = hp300_ports; port; ) {
|
|
serial8250_unregister_port(port->line);
|
|
to_free = port;
|
|
port = port->next;
|
|
kfree(to_free);
|
|
}
|
|
|
|
hp300_ports = NULL;
|
|
#endif
|
|
#ifdef CONFIG_HPDCA
|
|
dio_unregister_driver(&hpdca_driver);
|
|
#endif
|
|
}
|
|
|
|
module_init(hp300_8250_init);
|
|
module_exit(hp300_8250_exit);
|
|
MODULE_DESCRIPTION("HP DCA/APCI serial driver");
|
|
MODULE_AUTHOR("Kars de Jong <jongk@linux-m68k.org>");
|
|
MODULE_LICENSE("GPL");
|