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path: root/drivers/tty/hvc/hvc_tile.c
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Diffstat (limited to 'drivers/tty/hvc/hvc_tile.c')
-rw-r--r--drivers/tty/hvc/hvc_tile.c196
1 files changed, 0 insertions, 196 deletions
diff --git a/drivers/tty/hvc/hvc_tile.c b/drivers/tty/hvc/hvc_tile.c
deleted file mode 100644
index b517c0661abb..000000000000
--- a/drivers/tty/hvc/hvc_tile.c
+++ /dev/null
@@ -1,196 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Copyright 2010 Tilera Corporation. All Rights Reserved.
- *
- * Tilera TILE Processor hypervisor console
- */
-
-#include <linux/console.h>
-#include <linux/delay.h>
-#include <linux/err.h>
-#include <linux/init.h>
-#include <linux/interrupt.h>
-#include <linux/irq.h>
-#include <linux/moduleparam.h>
-#include <linux/platform_device.h>
-#include <linux/types.h>
-
-#include <asm/setup.h>
-#include <arch/sim_def.h>
-
-#include <hv/hypervisor.h>
-
-#include "hvc_console.h"
-
-static int use_sim_console;
-static int __init sim_console(char *str)
-{
- use_sim_console = 1;
- return 0;
-}
-early_param("sim_console", sim_console);
-
-int tile_console_write(const char *buf, int count)
-{
- if (unlikely(use_sim_console)) {
- int i;
- for (i = 0; i < count; ++i)
- __insn_mtspr(SPR_SIM_CONTROL, SIM_CONTROL_PUTC |
- (buf[i] << _SIM_CONTROL_OPERATOR_BITS));
- __insn_mtspr(SPR_SIM_CONTROL, SIM_CONTROL_PUTC |
- (SIM_PUTC_FLUSH_BINARY <<
- _SIM_CONTROL_OPERATOR_BITS));
- return 0;
- } else {
- /* Translate 0 bytes written to EAGAIN for hvc_console_print. */
- return hv_console_write((HV_VirtAddr)buf, count) ?: -EAGAIN;
- }
-}
-
-static int hvc_tile_put_chars(uint32_t vt, const char *buf, int count)
-{
- return tile_console_write(buf, count);
-}
-
-static int hvc_tile_get_chars(uint32_t vt, char *buf, int count)
-{
- int i, c;
-
- for (i = 0; i < count; ++i) {
- c = hv_console_read_if_ready();
- if (c < 0)
- break;
- buf[i] = c;
- }
-
- return i;
-}
-
-#ifdef __tilegx__
-/*
- * IRQ based callbacks.
- */
-static int hvc_tile_notifier_add_irq(struct hvc_struct *hp, int irq)
-{
- int rc;
- int cpu = raw_smp_processor_id(); /* Choose an arbitrary cpu */
- HV_Coord coord = { .x = cpu_x(cpu), .y = cpu_y(cpu) };
-
- rc = notifier_add_irq(hp, irq);
- if (rc)
- return rc;
-
- /*
- * Request that the hypervisor start sending us interrupts.
- * If the hypervisor returns an error, we still return 0, so that
- * we can fall back to polling.
- */
- if (hv_console_set_ipi(KERNEL_PL, irq, coord) < 0)
- notifier_del_irq(hp, irq);
-
- return 0;
-}
-
-static void hvc_tile_notifier_del_irq(struct hvc_struct *hp, int irq)
-{
- HV_Coord coord = { 0, 0 };
-
- /* Tell the hypervisor to stop sending us interrupts. */
- hv_console_set_ipi(KERNEL_PL, -1, coord);
-
- notifier_del_irq(hp, irq);
-}
-
-static void hvc_tile_notifier_hangup_irq(struct hvc_struct *hp, int irq)
-{
- hvc_tile_notifier_del_irq(hp, irq);
-}
-#endif
-
-static const struct hv_ops hvc_tile_get_put_ops = {
- .get_chars = hvc_tile_get_chars,
- .put_chars = hvc_tile_put_chars,
-#ifdef __tilegx__
- .notifier_add = hvc_tile_notifier_add_irq,
- .notifier_del = hvc_tile_notifier_del_irq,
- .notifier_hangup = hvc_tile_notifier_hangup_irq,
-#endif
-};
-
-
-#ifdef __tilegx__
-static int hvc_tile_probe(struct platform_device *pdev)
-{
- struct hvc_struct *hp;
- int tile_hvc_irq;
-
- /* Create our IRQ and register it. */
- tile_hvc_irq = irq_alloc_hwirq(-1);
- if (!tile_hvc_irq)
- return -ENXIO;
-
- tile_irq_activate(tile_hvc_irq, TILE_IRQ_PERCPU);
- hp = hvc_alloc(0, tile_hvc_irq, &hvc_tile_get_put_ops, 128);
- if (IS_ERR(hp)) {
- irq_free_hwirq(tile_hvc_irq);
- return PTR_ERR(hp);
- }
- dev_set_drvdata(&pdev->dev, hp);
-
- return 0;
-}
-
-static int hvc_tile_remove(struct platform_device *pdev)
-{
- int rc;
- struct hvc_struct *hp = dev_get_drvdata(&pdev->dev);
-
- rc = hvc_remove(hp);
- if (rc == 0)
- irq_free_hwirq(hp->data);
-
- return rc;
-}
-
-static void hvc_tile_shutdown(struct platform_device *pdev)
-{
- struct hvc_struct *hp = dev_get_drvdata(&pdev->dev);
-
- hvc_tile_notifier_del_irq(hp, hp->data);
-}
-
-static struct platform_device hvc_tile_pdev = {
- .name = "hvc-tile",
- .id = 0,
-};
-
-static struct platform_driver hvc_tile_driver = {
- .probe = hvc_tile_probe,
- .remove = hvc_tile_remove,
- .shutdown = hvc_tile_shutdown,
- .driver = {
- .name = "hvc-tile",
- }
-};
-#endif
-
-static int __init hvc_tile_console_init(void)
-{
- hvc_instantiate(0, 0, &hvc_tile_get_put_ops);
- add_preferred_console("hvc", 0, NULL);
- return 0;
-}
-console_initcall(hvc_tile_console_init);
-
-static int __init hvc_tile_init(void)
-{
-#ifndef __tilegx__
- struct hvc_struct *hp;
- hp = hvc_alloc(0, 0, &hvc_tile_get_put_ops, 128);
- return PTR_ERR_OR_ZERO(hp);
-#else
- platform_device_register(&hvc_tile_pdev);
- return platform_driver_register(&hvc_tile_driver);
-#endif
-}
-device_initcall(hvc_tile_init);