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a9f96f014f
Now that the SPDX tag is in all tty files, that identifies the license in a specific and legally-defined manner. So the extra GPL text wording can be removed as it is no longer needed at all. This is done on a quest to remove the 700+ different ways that files in the kernel describe the GPL license text. And there's unneeded stuff like the address (sometimes incorrect) for the FSF which is never needed. No copyright headers or other non-license-description text was removed. Cc: Jiri Slaby <jslaby@suse.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Chris Metcalf <cmetcalf@mellanox.com> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
82 lines
1.3 KiB
C
82 lines
1.3 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* udbg interface to hvc_console.c
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*
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* (C) Copyright David Gibson, IBM Corporation 2008.
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*/
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#include <linux/console.h>
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#include <linux/delay.h>
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#include <linux/err.h>
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#include <linux/init.h>
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#include <linux/moduleparam.h>
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#include <linux/types.h>
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#include <linux/irq.h>
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#include <asm/udbg.h>
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#include "hvc_console.h"
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struct hvc_struct *hvc_udbg_dev;
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static int hvc_udbg_put(uint32_t vtermno, const char *buf, int count)
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{
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int i;
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for (i = 0; i < count && udbg_putc; i++)
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udbg_putc(buf[i]);
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return i;
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}
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static int hvc_udbg_get(uint32_t vtermno, char *buf, int count)
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{
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int i, c;
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if (!udbg_getc_poll)
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return 0;
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for (i = 0; i < count; i++) {
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if ((c = udbg_getc_poll()) == -1)
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break;
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buf[i] = c;
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}
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return i;
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}
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static const struct hv_ops hvc_udbg_ops = {
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.get_chars = hvc_udbg_get,
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.put_chars = hvc_udbg_put,
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};
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static int __init hvc_udbg_init(void)
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{
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struct hvc_struct *hp;
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if (!udbg_putc)
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return -ENODEV;
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BUG_ON(hvc_udbg_dev);
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hp = hvc_alloc(0, 0, &hvc_udbg_ops, 16);
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if (IS_ERR(hp))
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return PTR_ERR(hp);
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hvc_udbg_dev = hp;
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return 0;
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}
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device_initcall(hvc_udbg_init);
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static int __init hvc_udbg_console_init(void)
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{
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if (!udbg_putc)
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return -ENODEV;
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hvc_instantiate(0, 0, &hvc_udbg_ops);
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add_preferred_console("hvc", 0, NULL);
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return 0;
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}
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console_initcall(hvc_udbg_console_init);
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