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Message-Id: <20231219-sam-sparc32-sunset-v3-v1-6-64bb44b598c5@ravnborg.org>
Date: Tue, 19 Dec 2023 23:03:11 +0100
From: Sam Ravnborg via B4 Relay <devnull+sam.ravnborg.org@...nel.org>
To: "David S. Miller" <davem@...emloft.net>,
Arnd Bergmann <arnd@...nel.org>, Andreas Larsson <andreas@...sler.com>
Cc: Helge Deller <deller@....de>, Alexander Viro <viro@...iv.linux.org.uk>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Alan Stern <stern@...land.harvard.edu>, Jaroslav Kysela <perex@...ex.cz>,
Takashi Iwai <tiwai@...e.com>, sparclinux@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org,
linux-fbdev@...r.kernel.org, dri-devel@...ts.freedesktop.org,
linux-sound@...r.kernel.org, Sam Ravnborg <sam@...nborg.org>
Subject: [PATCH 06/27] sparc32: Drop auxio support
From: Sam Ravnborg <sam@...nborg.org>
auxio is not supported by LEON - so drop it.
Signed-off-by: Sam Ravnborg <sam@...nborg.org>
Cc: "David S. Miller" <davem@...emloft.net>
Cc: Arnd Bergmann <arnd@...nel.org>
Cc: Andreas Larsson <andreas@...sler.com>
---
arch/sparc/include/asm/auxio_32.h | 73 +-------------------
arch/sparc/kernel/Makefile | 2 +-
arch/sparc/kernel/auxio_32.c | 139 --------------------------------------
arch/sparc/kernel/devices.c | 3 -
arch/sparc/kernel/kernel.h | 4 --
arch/sparc/kernel/process_32.c | 10 ---
arch/sparc/prom/misc_32.c | 2 -
7 files changed, 3 insertions(+), 230 deletions(-)
diff --git a/arch/sparc/include/asm/auxio_32.h b/arch/sparc/include/asm/auxio_32.h
index 852457c7a265..e2335ddd359d 100644
--- a/arch/sparc/include/asm/auxio_32.h
+++ b/arch/sparc/include/asm/auxio_32.h
@@ -1,43 +1,12 @@
/* SPDX-License-Identifier: GPL-2.0 */
/*
- * auxio.h: Definitions and code for the Auxiliary I/O register.
+ * Dummy definitions for the Auxiliary I/O register.
*
* Copyright (C) 1995 David S. Miller (davem@...p.rutgers.edu)
*/
#ifndef _SPARC_AUXIO_H
#define _SPARC_AUXIO_H
-#include <asm/vaddrs.h>
-
-/* This register is an unsigned char in IO space. It does two things.
- * First, it is used to control the front panel LED light on machines
- * that have it (good for testing entry points to trap handlers and irq's)
- * Secondly, it controls various floppy drive parameters.
- */
-#define AUXIO_ORMEIN 0xf0 /* All writes must set these bits. */
-#define AUXIO_ORMEIN4M 0xc0 /* sun4m - All writes must set these bits. */
-#define AUXIO_FLPY_DENS 0x20 /* Floppy density, high if set. Read only. */
-#define AUXIO_FLPY_DCHG 0x10 /* A disk change occurred. Read only. */
-#define AUXIO_EDGE_ON 0x10 /* sun4m - On means Jumper block is in. */
-#define AUXIO_FLPY_DSEL 0x08 /* Drive select/start-motor. Write only. */
-#define AUXIO_LINK_TEST 0x08 /* sun4m - On means TPE Carrier detect. */
-
-/* Set the following to one, then zero, after doing a pseudo DMA transfer. */
-#define AUXIO_FLPY_TCNT 0x04 /* Floppy terminal count. Write only. */
-
-/* Set the following to zero to eject the floppy. */
-#define AUXIO_FLPY_EJCT 0x02 /* Eject floppy disk. Write only. */
-#define AUXIO_LED 0x01 /* On if set, off if unset. Read/Write */
-
-#ifndef __ASSEMBLY__
-
-/*
- * NOTE: these routines are implementation dependent--
- * understand the hardware you are querying!
- */
-void set_auxio(unsigned char bits_on, unsigned char bits_off);
-unsigned char get_auxio(void); /* .../asm/floppy.h */
-
/*
* The following routines are provided for driver-compatibility
* with sparc64 (primarily sunlance.c)
@@ -46,44 +15,6 @@ unsigned char get_auxio(void); /* .../asm/floppy.h */
#define AUXIO_LTE_ON 1
#define AUXIO_LTE_OFF 0
-/* auxio_set_lte - Set Link Test Enable (TPE Link Detect)
- *
- * on - AUXIO_LTE_ON or AUXIO_LTE_OFF
- */
-#define auxio_set_lte(on) \
-do { \
- if(on) { \
- set_auxio(AUXIO_LINK_TEST, 0); \
- } else { \
- set_auxio(0, AUXIO_LINK_TEST); \
- } \
-} while (0)
-
-#define AUXIO_LED_ON 1
-#define AUXIO_LED_OFF 0
-
-/* auxio_set_led - Set system front panel LED
- *
- * on - AUXIO_LED_ON or AUXIO_LED_OFF
- */
-#define auxio_set_led(on) \
-do { \
- if(on) { \
- set_auxio(AUXIO_LED, 0); \
- } else { \
- set_auxio(0, AUXIO_LED); \
- } \
-} while (0)
-
-#endif /* !(__ASSEMBLY__) */
-
-
-/* AUXIO2 (Power Off Control) */
-extern volatile u8 __iomem *auxio_power_register;
-
-#define AUXIO_POWER_DETECT_FAILURE 32
-#define AUXIO_POWER_CLEAR_FAILURE 2
-#define AUXIO_POWER_OFF 1
-
+#define auxio_set_lte(on)
#endif /* !(_SPARC_AUXIO_H) */
diff --git a/arch/sparc/kernel/Makefile b/arch/sparc/kernel/Makefile
index ab47823f8b4e..577cb57c588a 100644
--- a/arch/sparc/kernel/Makefile
+++ b/arch/sparc/kernel/Makefile
@@ -83,7 +83,7 @@ obj-$(CONFIG_SMP) += trampoline_$(BITS).o smp_$(BITS).o
obj-$(CONFIG_SPARC32_SMP) += sun4m_smp.o sun4d_smp.o leon_smp.o
obj-$(CONFIG_SPARC64_SMP) += hvtramp.o
-obj-y += auxio_$(BITS).o
+obj-$(CONFIG_SPARC64) += auxio_64.o
obj-y += termios.o
diff --git a/arch/sparc/kernel/auxio_32.c b/arch/sparc/kernel/auxio_32.c
deleted file mode 100644
index 989860e890c4..000000000000
--- a/arch/sparc/kernel/auxio_32.c
+++ /dev/null
@@ -1,139 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/* auxio.c: Probing for the Sparc AUXIO register at boot time.
- *
- * Copyright (C) 1996 David S. Miller (davem@...p.rutgers.edu)
- */
-
-#include <linux/stddef.h>
-#include <linux/init.h>
-#include <linux/spinlock.h>
-#include <linux/of.h>
-#include <linux/export.h>
-
-#include <asm/oplib.h>
-#include <asm/io.h>
-#include <asm/auxio.h>
-#include <asm/string.h> /* memset(), Linux has no bzero() */
-#include <asm/cpu_type.h>
-
-#include "kernel.h"
-
-/* Probe and map in the Auxiliary I/O register */
-
-/* auxio_register is not static because it is referenced
- * in entry.S::floppy_tdone
- */
-void __iomem *auxio_register = NULL;
-static DEFINE_SPINLOCK(auxio_lock);
-
-void __init auxio_probe(void)
-{
- phandle node, auxio_nd;
- struct linux_prom_registers auxregs[1];
- struct resource r;
-
- switch (sparc_cpu_model) {
- case sparc_leon:
- case sun4d:
- return;
- default:
- break;
- }
- node = prom_getchild(prom_root_node);
- auxio_nd = prom_searchsiblings(node, "auxiliary-io");
- if(!auxio_nd) {
- node = prom_searchsiblings(node, "obio");
- node = prom_getchild(node);
- auxio_nd = prom_searchsiblings(node, "auxio");
- if(!auxio_nd) {
-#ifdef CONFIG_PCI
- /* There may be auxio on Ebus */
- return;
-#else
- if(prom_searchsiblings(node, "leds")) {
- /* VME chassis sun4m machine, no auxio exists. */
- return;
- }
- prom_printf("Cannot find auxio node, cannot continue...\n");
- prom_halt();
-#endif
- }
- }
- if(prom_getproperty(auxio_nd, "reg", (char *) auxregs, sizeof(auxregs)) <= 0)
- return;
- prom_apply_obio_ranges(auxregs, 0x1);
- /* Map the register both read and write */
- r.flags = auxregs[0].which_io & 0xF;
- r.start = auxregs[0].phys_addr;
- r.end = auxregs[0].phys_addr + auxregs[0].reg_size - 1;
- auxio_register = of_ioremap(&r, 0, auxregs[0].reg_size, "auxio");
- /* Fix the address on sun4m. */
- if ((((unsigned long) auxregs[0].phys_addr) & 3) == 3)
- auxio_register += (3 - ((unsigned long)auxio_register & 3));
-
- set_auxio(AUXIO_LED, 0);
-}
-
-unsigned char get_auxio(void)
-{
- if(auxio_register)
- return sbus_readb(auxio_register);
- return 0;
-}
-EXPORT_SYMBOL(get_auxio);
-
-void set_auxio(unsigned char bits_on, unsigned char bits_off)
-{
- unsigned char regval;
- unsigned long flags;
- spin_lock_irqsave(&auxio_lock, flags);
- switch (sparc_cpu_model) {
- case sun4m:
- if(!auxio_register)
- break; /* VME chassis sun4m, no auxio. */
- regval = sbus_readb(auxio_register);
- sbus_writeb(((regval | bits_on) & ~bits_off) | AUXIO_ORMEIN4M,
- auxio_register);
- break;
- case sun4d:
- break;
- default:
- panic("Can't set AUXIO register on this machine.");
- }
- spin_unlock_irqrestore(&auxio_lock, flags);
-}
-EXPORT_SYMBOL(set_auxio);
-
-/* sun4m power control register (AUXIO2) */
-
-volatile u8 __iomem *auxio_power_register = NULL;
-
-void __init auxio_power_probe(void)
-{
- struct linux_prom_registers regs;
- phandle node;
- struct resource r;
-
- /* Attempt to find the sun4m power control node. */
- node = prom_getchild(prom_root_node);
- node = prom_searchsiblings(node, "obio");
- node = prom_getchild(node);
- node = prom_searchsiblings(node, "power");
- if (node == 0 || (s32)node == -1)
- return;
-
- /* Map the power control register. */
- if (prom_getproperty(node, "reg", (char *)®s, sizeof(regs)) <= 0)
- return;
- prom_apply_obio_ranges(®s, 1);
- memset(&r, 0, sizeof(r));
- r.flags = regs.which_io & 0xF;
- r.start = regs.phys_addr;
- r.end = regs.phys_addr + regs.reg_size - 1;
- auxio_power_register =
- (u8 __iomem *)of_ioremap(&r, 0, regs.reg_size, "auxpower");
-
- /* Display a quick message on the console. */
- if (auxio_power_register)
- printk(KERN_INFO "Power off control detected.\n");
-}
diff --git a/arch/sparc/kernel/devices.c b/arch/sparc/kernel/devices.c
index 23b6e50d4ada..b3c2d51b22c4 100644
--- a/arch/sparc/kernel/devices.c
+++ b/arch/sparc/kernel/devices.c
@@ -132,7 +132,4 @@ void __init device_scan(void)
0);
}
#endif /* !CONFIG_SMP */
-
- auxio_probe();
- auxio_power_probe();
}
diff --git a/arch/sparc/kernel/kernel.h b/arch/sparc/kernel/kernel.h
index ef5579496088..c8ba3bc7e137 100644
--- a/arch/sparc/kernel/kernel.h
+++ b/arch/sparc/kernel/kernel.h
@@ -174,10 +174,6 @@ asmlinkage void user_unaligned_trap(struct pt_regs *regs, unsigned int insn);
/* windows.c */
void try_to_clear_window_buffer(struct pt_regs *regs, int who);
-/* auxio_32.c */
-void __init auxio_probe(void);
-void __init auxio_power_probe(void);
-
/* pcic.c */
extern void __iomem *pcic_regs;
void pcic_nmi(unsigned int pend, struct pt_regs *regs);
diff --git a/arch/sparc/kernel/process_32.c b/arch/sparc/kernel/process_32.c
index 9c7c662cb565..2e2836f314ca 100644
--- a/arch/sparc/kernel/process_32.c
+++ b/arch/sparc/kernel/process_32.c
@@ -27,7 +27,6 @@
#include <linux/slab.h>
#include <linux/cpu.h>
-#include <asm/auxio.h>
#include <asm/oplib.h>
#include <linux/uaccess.h>
#include <asm/page.h>
@@ -49,8 +48,6 @@ void (*sparc_idle)(void);
/*
* Power-off handler instantiation for pm.h compliance
- * This is done via auxio, but could be used as a fallback
- * handler when auxio is not present-- unused for now...
*/
void (*pm_power_off)(void) = machine_power_off;
EXPORT_SYMBOL(pm_power_off);
@@ -103,13 +100,6 @@ void machine_restart(char * cmd)
void machine_power_off(void)
{
- if (auxio_power_register &&
- (!of_node_is_type(of_console_device, "serial") || scons_pwroff)) {
- u8 power_register = sbus_readb(auxio_power_register);
- power_register |= AUXIO_POWER_OFF;
- sbus_writeb(power_register, auxio_power_register);
- }
-
machine_halt();
}
diff --git a/arch/sparc/prom/misc_32.c b/arch/sparc/prom/misc_32.c
index 625750924860..78dde6bfbf0f 100644
--- a/arch/sparc/prom/misc_32.c
+++ b/arch/sparc/prom/misc_32.c
@@ -13,7 +13,6 @@
#include <asm/openprom.h>
#include <asm/oplib.h>
-#include <asm/auxio.h>
extern void restore_current(void);
@@ -60,7 +59,6 @@ prom_cmdline(void)
(*(romvec->pv_abort))();
restore_current();
spin_unlock_irqrestore(&prom_lock, flags);
- set_auxio(AUXIO_LED, 0);
}
/* Drop into the prom, but completely terminate the program.
--
2.34.1
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