Commit da3c6efe authored by Jens Axboe's avatar Jens Axboe
Browse files

Remove jsflash driver 



Nobody is using it anymore, and it's been abandoned. Since David
is fine with removing it, kill it.

Suggested-by: default avatarChristoph Hellwig <hch@lst.de>
Acked-by: default avatarDavid S. Miller <davem@davemloft.net>
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 6fcefbe5

arch/sparc/include/uapi/asm/jsflash.h

deleted100644 → 0
+0 −40
Original line number Diff line number Diff line 
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */

/*

 * jsflash.h: OS Flash SIMM support for JavaStations.

 *

 * Copyright (C) 1999  Pete Zaitcev

 */



#ifndef _SPARC_JSFLASH_H

#define _SPARC_JSFLASH_H



#ifndef _SPARC_TYPES_H

#include <linux/types.h>

#endif



/*

 * Semantics of the offset is a full address.

 * Hardcode it or get it from probe ioctl.

 *

 * We use full bus address, so that we would be

 * automatically compatible with possible future systems.

 */



#define JSFLASH_IDENT   (('F'<<8)|54)

struct jsflash_ident_arg {

	__u64 off;                /* 0x20000000 is included */

	__u32 size;

	char name[32];		/* With trailing zero */

};



#define JSFLASH_ERASE   (('F'<<8)|55)

/* Put 0 as argument, may be flags or sector number... */



#define JSFLASH_PROGRAM (('F'<<8)|56)

struct jsflash_program_arg {

	__u64 data;		/* char* for sparc and sparc64 */

	__u64 off;

	__u32 size;

};



#endif /* _SPARC_JSFLASH_H */

drivers/sbus/char/Kconfig

+0 −7
Original line number Diff line number Diff line
@@ -28,13 +28,6 @@ config TADPOLE_TS102_UCTRL 
	  events, and can also notice the attachment/detachment of external

	  monitors and mice.



config SUN_JSFLASH

	tristate "JavaStation OS Flash SIMM"

	depends on SPARC32

	help

	  If you say Y here, you will be able to boot from your JavaStation's

	  Flash memory.



config BBC_I2C

	tristate "UltraSPARC-III bootbus i2c controller driver"

	depends on PCI && SPARC64

drivers/sbus/char/Makefile

+0 −1
Original line number Diff line number Diff line
@@ -15,6 +15,5 @@ obj-$(CONFIG_DISPLAY7SEG) += display7seg.o 
obj-$(CONFIG_OBP_FLASH)			+= flash.o

obj-$(CONFIG_SUN_OPENPROMIO)		+= openprom.o

obj-$(CONFIG_TADPOLE_TS102_UCTRL)	+= uctrl.o

obj-$(CONFIG_SUN_JSFLASH)		+= jsflash.o

obj-$(CONFIG_BBC_I2C)			+= bbc.o

obj-$(CONFIG_ORACLE_DAX) 		+= oradax.o

drivers/sbus/char/jsflash.c

deleted100644 → 0
+0 −660
Original line number Diff line number Diff line 
/*

 * drivers/sbus/char/jsflash.c

 *

 *  Copyright (C) 1991, 1992  Linus Torvalds	(drivers/char/mem.c)

 *  Copyright (C) 1997  Eddie C. Dost		(drivers/sbus/char/flash.c)

 *  Copyright (C) 1997-2000 Pavel Machek <pavel@ucw.cz>   (drivers/block/nbd.c)

 *  Copyright (C) 1999-2000 Pete Zaitcev

 *

 * This driver is used to program OS into a Flash SIMM on

 * Krups and Espresso platforms.

 *

 * TODO: do not allow erase/programming if file systems are mounted.

 * TODO: Erase/program both banks of a 8MB SIMM.

 *

 * It is anticipated that programming an OS Flash will be a routine

 * procedure. In the same time it is exceedingly dangerous because

 * a user can program its OBP flash with OS image and effectively

 * kill the machine.

 *

 * This driver uses an interface different from Eddie's flash.c

 * as a silly safeguard.

 *

 * XXX The flash.c manipulates page caching characteristics in a certain

 * dubious way; also it assumes that remap_pfn_range() can remap

 * PCI bus locations, which may be false. ioremap() must be used

 * instead. We should discuss this.

 */



#include <linux/module.h>

#include <linux/mutex.h>

#include <linux/types.h>

#include <linux/errno.h>

#include <linux/miscdevice.h>

#include <linux/fcntl.h>

#include <linux/poll.h>

#include <linux/init.h>

#include <linux/string.h>

#include <linux/genhd.h>

#include <linux/blkdev.h>

#include <linux/uaccess.h>

#include <asm/pgtable.h>

#include <asm/io.h>

#include <asm/pcic.h>

#include <asm/oplib.h>



#include <asm/jsflash.h>		/* ioctl arguments. <linux/> ?? */

#define JSFIDSZ		(sizeof(struct jsflash_ident_arg))

#define JSFPRGSZ	(sizeof(struct jsflash_program_arg))



/*

 * Our device numbers have no business in system headers.

 * The only thing a user knows is the device name /dev/jsflash.

 *

 * Block devices are laid out like this:

 *   minor+0	- Bootstrap, for 8MB SIMM 0x20400000[0x800000]

 *   minor+1	- Filesystem to mount, normally 0x20400400[0x7ffc00]

 *   minor+2	- Whole flash area for any case... 0x20000000[0x01000000]

 * Total 3 minors per flash device.

 *

 * It is easier to have static size vectors, so we define

 * a total minor range JSF_MAX, which must cover all minors.

 */

/* character device */

#define JSF_MINOR	178	/* 178 is registered with hpa */

/* block device */

#define JSF_MAX		 3	/* 3 minors wasted total so far. */

#define JSF_NPART	 3	/* 3 minors per flash device */

#define JSF_PART_BITS	 2	/* 2 bits of minors to cover JSF_NPART */

#define JSF_PART_MASK	 0x3	/* 2 bits mask */



static DEFINE_MUTEX(jsf_mutex);



/*

 * Access functions.

 * We could ioremap(), but it's easier this way.

 */

static unsigned int jsf_inl(unsigned long addr)

{

	unsigned long retval;



	__asm__ __volatile__("lda [%1] %2, %0\n\t" :

				"=r" (retval) :

				"r" (addr), "i" (ASI_M_BYPASS));

        return retval;

}



static void jsf_outl(unsigned long addr, __u32 data)

{



	__asm__ __volatile__("sta %0, [%1] %2\n\t" : :

				"r" (data), "r" (addr), "i" (ASI_M_BYPASS) :

				"memory");

}



/*

 * soft carrier

 */



struct jsfd_part {

	unsigned long dbase;

	unsigned long dsize;

};



struct jsflash {

	unsigned long base;

	unsigned long size;

	unsigned long busy;		/* In use? */

	struct jsflash_ident_arg id;

	/* int mbase; */		/* Minor base, typically zero */

	struct jsfd_part dv[JSF_NPART];

};



/*

 * We do not map normal memory or obio as a safety precaution.

 * But offsets are real, for ease of userland programming.

 */

#define JSF_BASE_TOP	0x30000000

#define JSF_BASE_ALL	0x20000000



#define JSF_BASE_JK	0x20400000



/*

 */

static struct gendisk *jsfd_disk[JSF_MAX];



/*

 * Let's pretend we may have several of these...

 */

static struct jsflash jsf0;



/*

 * Wait for AMD to finish its embedded algorithm.

 * We use the Toggle bit DQ6 (0x40) because it does not

 * depend on the data value as /DATA bit DQ7 does.

 *

 * XXX Do we need any timeout here? So far it never hanged, beware broken hw.

 */

static void jsf_wait(unsigned long p) {

	unsigned int x1, x2;



	for (;;) {

		x1 = jsf_inl(p);

		x2 = jsf_inl(p);

		if ((x1 & 0x40404040) == (x2 & 0x40404040)) return;

	}

}



/*

 * Programming will only work if Flash is clean,

 * we leave it to the programmer application.

 *

 * AMD must be programmed one byte at a time;

 * thus, Simple Tech SIMM must be written 4 bytes at a time.

 *

 * Write waits for the chip to become ready after the write

 * was finished. This is done so that application would read

 * consistent data after the write is done.

 */

static void jsf_write4(unsigned long fa, u32 data) {



	jsf_outl(fa, 0xAAAAAAAA);		/* Unlock 1 Write 1 */

	jsf_outl(fa, 0x55555555);		/* Unlock 1 Write 2 */

	jsf_outl(fa, 0xA0A0A0A0);		/* Byte Program */

	jsf_outl(fa, data);



	jsf_wait(fa);

}



/*

 */

static void jsfd_read(char *buf, unsigned long p, size_t togo) {

	union byte4 {

		char s[4];

		unsigned int n;

	} b;



	while (togo >= 4) {

		togo -= 4;

		b.n = jsf_inl(p);

		memcpy(buf, b.s, 4);

		p += 4;

		buf += 4;

	}

}



static int jsfd_queue;



static struct request *jsfd_next_request(void)

{

	struct request_queue *q;

	struct request *rq;

	int old_pos = jsfd_queue;



	do {

		q = jsfd_disk[jsfd_queue]->queue;

		if (++jsfd_queue == JSF_MAX)

			jsfd_queue = 0;

		if (q) {

			rq = blk_fetch_request(q);

			if (rq)

				return rq;

		}

	} while (jsfd_queue != old_pos);



	return NULL;

}



static void jsfd_request(void)

{

	struct request *req;



	req = jsfd_next_request();

	while (req) {

		struct jsfd_part *jdp = req->rq_disk->private_data;

		unsigned long offset = blk_rq_pos(req) << 9;

		size_t len = blk_rq_cur_bytes(req);

		blk_status_t err = BLK_STS_IOERR;

		void *p;



		if ((offset + len) > jdp->dsize)

			goto end;



		if (rq_data_dir(req) != READ) {

			printk(KERN_ERR "jsfd: write\n");

			goto end;

		}



		if ((jdp->dbase & 0xff000000) != 0x20000000) {

			printk(KERN_ERR "jsfd: bad base %x\n", (int)jdp->dbase);

			goto end;

		}



		p = kmap_atomic(bio_page(bio)) + bio_offset(bio);

		jsfd_read(p, jdp->dbase + offset, len);

		kunmap_atomic(p);

		err = BLK_STS_OK;

	end:

		if (!__blk_end_request_cur(req, err))

			req = jsfd_next_request();

	}

}



static void jsfd_do_request(struct request_queue *q)

{

	jsfd_request();

}



/*

 * The memory devices use the full 32/64 bits of the offset, and so we cannot

 * check against negative addresses: they are ok. The return value is weird,

 * though, in that case (0).

 *

 * also note that seeking relative to the "end of file" isn't supported:

 * it has no meaning, so it returns -EINVAL.

 */

static loff_t jsf_lseek(struct file * file, loff_t offset, int orig)

{

	loff_t ret;



	mutex_lock(&jsf_mutex);

	switch (orig) {

		case 0:

			file->f_pos = offset;

			ret = file->f_pos;

			break;

		case 1:

			file->f_pos += offset;

			ret = file->f_pos;

			break;

		default:

			ret = -EINVAL;

	}

	mutex_unlock(&jsf_mutex);

	return ret;

}



/*

 * OS SIMM Cannot be read in other size but a 32bits word.

 */

static ssize_t jsf_read(struct file * file, char __user * buf, 

    size_t togo, loff_t *ppos)

{

	unsigned long p = *ppos;

	char __user *tmp = buf;



	union byte4 {

		char s[4];

		unsigned int n;

	} b;



	if (p < JSF_BASE_ALL || p >= JSF_BASE_TOP) {

		return 0;

	}



	if ((p + togo) < p	/* wrap */

	   || (p + togo) >= JSF_BASE_TOP) {

		togo = JSF_BASE_TOP - p;

	}



	if (p < JSF_BASE_ALL && togo != 0) {

#if 0 /* __bzero XXX */

		size_t x = JSF_BASE_ALL - p;

		if (x > togo) x = togo;

		clear_user(tmp, x);

		tmp += x;

		p += x;

		togo -= x;

#else

		/*

		 * Implementation of clear_user() calls __bzero

		 * without regard to modversions,

		 * so we cannot build a module.

		 */

		return 0;

#endif

	}



	while (togo >= 4) {

		togo -= 4;

		b.n = jsf_inl(p);

		if (copy_to_user(tmp, b.s, 4))

			return -EFAULT;

		tmp += 4;

		p += 4;

	}



	/*

	 * XXX Small togo may remain if 1 byte is ordered.

	 * It would be nice if we did a word size read and unpacked it.

	 */



	*ppos = p;

	return tmp-buf;

}



static ssize_t jsf_write(struct file * file, const char __user * buf,

    size_t count, loff_t *ppos)

{

	return -ENOSPC;

}



/*

 */

static int jsf_ioctl_erase(unsigned long arg)

{

	unsigned long p;



	/* p = jsf0.base;	hits wrong bank */

	p = 0x20400000;



	jsf_outl(p, 0xAAAAAAAA);		/* Unlock 1 Write 1 */

	jsf_outl(p, 0x55555555);		/* Unlock 1 Write 2 */

	jsf_outl(p, 0x80808080);		/* Erase setup */

	jsf_outl(p, 0xAAAAAAAA);		/* Unlock 2 Write 1 */

	jsf_outl(p, 0x55555555);		/* Unlock 2 Write 2 */

	jsf_outl(p, 0x10101010);		/* Chip erase */



#if 0

	/*

	 * This code is ok, except that counter based timeout

	 * has no place in this world. Let's just drop timeouts...

	 */

	{

		int i;

		__u32 x;

		for (i = 0; i < 1000000; i++) {

			x = jsf_inl(p);

			if ((x & 0x80808080) == 0x80808080) break;

		}

		if ((x & 0x80808080) != 0x80808080) {

			printk("jsf0: erase timeout with 0x%08x\n", x);

		} else {

			printk("jsf0: erase done with 0x%08x\n", x);

		}

	}

#else

	jsf_wait(p);

#endif



	return 0;

}



/*

 * Program a block of flash.

 * Very simple because we can do it byte by byte anyway.

 */

static int jsf_ioctl_program(void __user *arg)

{

	struct jsflash_program_arg abuf;

	char __user *uptr;

	unsigned long p;

	unsigned int togo;

	union {

		unsigned int n;

		char s[4];

	} b;



	if (copy_from_user(&abuf, arg, JSFPRGSZ))

		return -EFAULT; 

	p = abuf.off;

	togo = abuf.size;

	if ((togo & 3) || (p & 3)) return -EINVAL;



	uptr = (char __user *) (unsigned long) abuf.data;

	while (togo != 0) {

		togo -= 4;

		if (copy_from_user(&b.s[0], uptr, 4))

			return -EFAULT;

		jsf_write4(p, b.n);

		p += 4;

		uptr += 4;

	}



	return 0;

}



static long jsf_ioctl(struct file *f, unsigned int cmd, unsigned long arg)

{

	mutex_lock(&jsf_mutex);

	int error = -ENOTTY;

	void __user *argp = (void __user *)arg;



	if (!capable(CAP_SYS_ADMIN)) {

		mutex_unlock(&jsf_mutex);

		return -EPERM;

	}

	switch (cmd) {

	case JSFLASH_IDENT:

		if (copy_to_user(argp, &jsf0.id, JSFIDSZ)) {

			mutex_unlock(&jsf_mutex);

			return -EFAULT;

		}

		break;

	case JSFLASH_ERASE:

		error = jsf_ioctl_erase(arg);

		break;

	case JSFLASH_PROGRAM:

		error = jsf_ioctl_program(argp);

		break;

	}



	mutex_unlock(&jsf_mutex);

	return error;

}



static int jsf_mmap(struct file * file, struct vm_area_struct * vma)

{

	return -ENXIO;

}



static int jsf_open(struct inode * inode, struct file * filp)

{

	mutex_lock(&jsf_mutex);

	if (jsf0.base == 0) {

		mutex_unlock(&jsf_mutex);

		return -ENXIO;

	}

	if (test_and_set_bit(0, (void *)&jsf0.busy) != 0) {

		mutex_unlock(&jsf_mutex);

		return -EBUSY;

	}



	mutex_unlock(&jsf_mutex);

	return 0;	/* XXX What security? */

}



static int jsf_release(struct inode *inode, struct file *file)

{

	jsf0.busy = 0;

	return 0;

}



static const struct file_operations jsf_fops = {

	.owner =	THIS_MODULE,

	.llseek =	jsf_lseek,

	.read =		jsf_read,

	.write =	jsf_write,

	.unlocked_ioctl =	jsf_ioctl,

	.mmap =		jsf_mmap,

	.open =		jsf_open,

	.release =	jsf_release,

};



static struct miscdevice jsf_dev = { JSF_MINOR, "jsflash", &jsf_fops };



static const struct block_device_operations jsfd_fops = {

	.owner =	THIS_MODULE,

};



static int jsflash_init(void)

{

	int rc;

	struct jsflash *jsf;

	phandle node;

	char banner[128];

	struct linux_prom_registers reg0;



	node = prom_getchild(prom_root_node);

	node = prom_searchsiblings(node, "flash-memory");

	if (node != 0 && (s32)node != -1) {

		if (prom_getproperty(node, "reg",

		    (char *)&reg0, sizeof(reg0)) == -1) {

			printk("jsflash: no \"reg\" property\n");

			return -ENXIO;

		}

		if (reg0.which_io != 0) {

			printk("jsflash: bus number nonzero: 0x%x:%x\n",

			    reg0.which_io, reg0.phys_addr);

			return -ENXIO;

		}

		/*

		 * Flash may be somewhere else, for instance on Ebus.

		 * So, don't do the following check for IIep flash space.

		 */

#if 0

		if ((reg0.phys_addr >> 24) != 0x20) {

			printk("jsflash: suspicious address: 0x%x:%x\n",

			    reg0.which_io, reg0.phys_addr);

			return -ENXIO;

		}

#endif

		if ((int)reg0.reg_size <= 0) {

			printk("jsflash: bad size 0x%x\n", (int)reg0.reg_size);

			return -ENXIO;

		}

	} else {

		/* XXX Remove this code once PROLL ID12 got widespread */

		printk("jsflash: no /flash-memory node, use PROLL >= 12\n");

		prom_getproperty(prom_root_node, "banner-name", banner, 128);

		if (strcmp (banner, "JavaStation-NC") != 0 &&

		    strcmp (banner, "JavaStation-E") != 0) {

			return -ENXIO;

		}

		reg0.which_io = 0;

		reg0.phys_addr = 0x20400000;

		reg0.reg_size  = 0x00800000;

	}



	/* Let us be really paranoid for modifications to probing code. */

	if (sparc_cpu_model != sun4m) {

		/* We must be on sun4m because we use MMU Bypass ASI. */

		return -ENXIO;

	}



	if (jsf0.base == 0) {

		jsf = &jsf0;



		jsf->base = reg0.phys_addr;

		jsf->size = reg0.reg_size;



		/* XXX Redo the userland interface. */

		jsf->id.off = JSF_BASE_ALL;

		jsf->id.size = 0x01000000;	/* 16M - all segments */

		strcpy(jsf->id.name, "Krups_all");



		jsf->dv[0].dbase = jsf->base;

		jsf->dv[0].dsize = jsf->size;

		jsf->dv[1].dbase = jsf->base + 1024;

		jsf->dv[1].dsize = jsf->size - 1024;

		jsf->dv[2].dbase = JSF_BASE_ALL;

		jsf->dv[2].dsize = 0x01000000;



		printk("Espresso Flash @0x%lx [%d MB]\n", jsf->base,

		    (int) (jsf->size / (1024*1024)));

	}



	if ((rc = misc_register(&jsf_dev)) != 0) {

		printk(KERN_ERR "jsf: unable to get misc minor %d\n",

		    JSF_MINOR);

		jsf0.base = 0;

		return rc;

	}



	return 0;

}



static int jsfd_init(void)

{

	static DEFINE_SPINLOCK(lock);

	struct jsflash *jsf;

	struct jsfd_part *jdp;

	int err;

	int i;



	if (jsf0.base == 0)

		return -ENXIO;



	err = -ENOMEM;

	for (i = 0; i < JSF_MAX; i++) {

		struct gendisk *disk = alloc_disk(1);

		if (!disk)

			goto out;

		disk->queue = blk_init_queue(jsfd_do_request, &lock);

		if (!disk->queue) {

			put_disk(disk);

			goto out;

		}

		jsfd_disk[i] = disk;

	}



	if (register_blkdev(JSFD_MAJOR, "jsfd")) {

		err = -EIO;

		goto out;

	}



	for (i = 0; i < JSF_MAX; i++) {

		struct gendisk *disk = jsfd_disk[i];

		if ((i & JSF_PART_MASK) >= JSF_NPART) continue;

		jsf = &jsf0;	/* actually, &jsfv[i >> JSF_PART_BITS] */

		jdp = &jsf->dv[i&JSF_PART_MASK];



		disk->major = JSFD_MAJOR;

		disk->first_minor = i;

		sprintf(disk->disk_name, "jsfd%d", i);

		disk->fops = &jsfd_fops;

		set_capacity(disk, jdp->dsize >> 9);

		disk->private_data = jdp;

		add_disk(disk);

		set_disk_ro(disk, 1);

	}

	return 0;

out:

	while (i--)

		put_disk(jsfd_disk[i]);

	return err;

}



MODULE_LICENSE("GPL");



static int __init jsflash_init_module(void) {

	int rc;



	if ((rc = jsflash_init()) == 0) {

		jsfd_init();

		return 0;

	}

	return rc;

}



static void __exit jsflash_cleanup_module(void)

{

	int i;



	for (i = 0; i < JSF_MAX; i++) {

		if ((i & JSF_PART_MASK) >= JSF_NPART) continue;

		del_gendisk(jsfd_disk[i]);

		blk_cleanup_queue(jsfd_disk[i]->queue);

		put_disk(jsfd_disk[i]);

	}

	if (jsf0.busy)

		printk("jsf0: cleaning busy unit\n");

	jsf0.base = 0;

	jsf0.busy = 0;



	misc_deregister(&jsf_dev);

	unregister_blkdev(JSFD_MAJOR, "jsfd");

}



module_init(jsflash_init_module);

module_exit(jsflash_cleanup_module);