Remove jsflash driver (da3c6efe) · Commits · e / devices / android_kernel_fairphone_FP5

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);