diff options
Diffstat (limited to 'drivers/tty/hvc/hvc_tile.c')
| -rw-r--r-- | drivers/tty/hvc/hvc_tile.c | 196 |
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); |