Add preliminary RouterBoard RB1xx support

SVN-Revision: 6839

1 files changed, 1011 insertions, 0 deletions

diff --git a/target/linux/rb1xx-2.6/patches/120-cf.patch b/target/linux/rb1xx-2.6/patches/120-cf.patch
new file mode 100644
index 0000000000..a22c526132
--- /dev/null
+++ b/target/linux/rb1xx-2.6/patches/120-cf.patch
@@ -0,0 +1,1011 @@
+diff -urN linux.old/drivers/block/Kconfig linux.dev/drivers/block/Kconfig
+--- linux.old/drivers/block/Kconfig	2006-10-26 02:43:39.000000000 +0200
++++ linux.dev/drivers/block/Kconfig	2006-10-26 00:11:14.000000000 +0200
+@@ -456,4 +456,12 @@
+ 	This driver provides Support for ATA over Ethernet block
+ 	devices like the Coraid EtherDrive (R) Storage Blade.
+ 
++config BLK_DEV_CF_MIPS
++	bool "CF slot of RB532 board"
++	depends on MIKROTIK_RB500 || MIPS_ADM5120
++	default y
++	help
++	  The Routerboard 532 has a CF slot on it. Enable the special block
++	  device driver for it.
++
+ endmenu
+diff -urN linux.old/drivers/block/Makefile linux.dev/drivers/block/Makefile
+--- linux.old/drivers/block/Makefile	2006-06-18 03:49:35.000000000 +0200
++++ linux.dev/drivers/block/Makefile	2006-10-26 02:44:10.000000000 +0200
+@@ -29,4 +29,5 @@
+ obj-$(CONFIG_VIODASD)		+= viodasd.o
+ obj-$(CONFIG_BLK_DEV_SX8)	+= sx8.o
+ obj-$(CONFIG_BLK_DEV_UB)	+= ub.o
++obj-$(CONFIG_BLK_DEV_CF_MIPS)	+= rb500/
+ 
+diff -urN linux.old/drivers/block/rb500/ata.c linux.dev/drivers/block/rb500/ata.c
+--- linux.old/drivers/block/rb500/ata.c	1970-01-01 01:00:00.000000000 +0100
++++ linux.dev/drivers/block/rb500/ata.c	2006-10-26 00:11:14.000000000 +0200
+@@ -0,0 +1,485 @@
++/* CF-mips driver
++   This is a block driver for the direct (mmaped) interface to the CF-slot,
++   found in Routerboard.com's RB532 board
++   See SDK provided from routerboard.com.
++   
++   Module adapted By P.Christeas <p_christeas@yahoo.com>, 2005-6.
++   Cleaned up and adapted to platform_device by Felix Fietkau <nbd@openwrt.org>
++
++   This work is redistributed under the terms of the GNU General Public License.
++*/
++
++#include <linux/kernel.h>	/* printk() */
++#include <linux/module.h>	/* module to be loadable */
++#include <linux/delay.h>
++#include <linux/sched.h>
++#include <linux/pci.h>
++#include <linux/ioport.h>	/* request_mem_region() */
++#include <asm/unaligned.h>		/* ioremap() */
++#include <asm/io.h>		/* ioremap() */
++#include <asm/rc32434/rb.h>
++
++#include "ata.h"
++
++#define REQUEST_MEM_REGION 0
++#define DEBUG 1
++
++#if DEBUG
++#define DEBUGP printk
++#else
++#define DEBUGP(format, args...)
++#endif
++
++#define SECS	1000000		/* unit for wait_not_busy() is 1us */
++
++unsigned cf_head = 0;
++unsigned cf_cyl = 0;
++unsigned cf_spt = 0;
++unsigned cf_sectors = 0;
++static unsigned cf_block_size = 1;
++static void *baddr = 0;
++
++#define DBUF32 ((volatile u32 *)((unsigned long)dev->baddr | ATA_DBUF_OFFSET))
++
++
++static void cf_do_tasklet(unsigned long dev_l);
++
++
++static inline void wareg(u8 val, unsigned reg, struct cf_mips_dev* dev)
++{
++	writeb(val, dev->baddr + ATA_REG_OFFSET + reg);
++}
++
++static inline u8 rareg(unsigned reg, struct cf_mips_dev* dev)
++{
++	return readb(dev->baddr + ATA_REG_OFFSET + reg);
++}
++
++static inline int get_gpio_bit(gpio_func ofs, struct cf_mips_dev *dev)
++{
++	return (gpio_get(ofs) >> dev->pin) & 1;
++}
++
++static inline void set_gpio_bit(int bit, gpio_func ofs, struct cf_mips_dev *dev)
++{
++	gpio_set(ofs, (1 << dev->pin), ((bit & 1) << dev->pin));
++}
++
++static inline int cfrdy(struct cf_mips_dev *dev)
++{
++	return get_gpio_bit(DATA, dev);
++}
++
++static inline void prepare_cf_irq(struct cf_mips_dev *dev)
++{
++	set_gpio_bit(1, ILEVEL, dev);	/* interrupt on cf ready (not busy) */
++	set_gpio_bit(0, ISTAT, dev); 	/* clear interrupt status */
++}
++
++static inline int cf_present(struct cf_mips_dev* dev)
++{
++	/* TODO: read and configure CIS into memory mapped mode
++	 * TODO:   parse CISTPL_CONFIG on CF+ cards to get base address (0x200)
++	 * TODO:   maybe adjust power saving setting for Hitachi Microdrive
++	 */
++	int i;
++
++	/* setup CFRDY GPIO as input */
++	set_gpio_bit(0, FUNC, dev);
++	set_gpio_bit(0, CFG, dev);
++
++	for (i = 0; i < 0x10; ++i) {
++		if (rareg(i,dev) != 0xff)
++			return 1;
++	}
++	return 0;
++}
++
++static inline int is_busy(struct cf_mips_dev *dev)
++{
++	return !cfrdy(dev);
++}
++
++static int wait_not_busy(int to_us, int wait_for_busy,struct cf_mips_dev *dev)
++{
++	int us_passed = 0;
++	if (wait_for_busy && !is_busy(dev)) {
++		/* busy must appear within 400ns,
++		 * but it may dissapear before we see it
++		 *  => must not wait for busy in a loop
++		 */
++		ndelay(400);
++	}
++
++	do {
++		if (us_passed)
++			udelay(1);	/* never reached in async mode */
++		if (!is_busy(dev)) {
++			if (us_passed > 1 * SECS) {
++				printk(KERN_WARNING "cf-mips:   not busy ok (after %dus)"
++				       ", status 0x%02x\n", us_passed, (unsigned) rareg(ATA_REG_ST,dev));
++			}
++			return CF_TRANS_OK;
++		}
++		if (us_passed == 1 * SECS) {
++			printk(KERN_WARNING "cf-mips: wait not busy %dus..\n", to_us);
++		}
++		if (dev->async_mode) {
++			dev->to_timer.expires = jiffies + (to_us * HZ / SECS);
++			dev->irq_enable_time = jiffies;
++			prepare_cf_irq(dev);
++			if (is_busy(dev)) {
++				add_timer(&dev->to_timer);
++				enable_irq(dev->irq);
++				return CF_TRANS_IN_PROGRESS;
++			}
++			continue;
++		}
++		++us_passed;
++	} while (us_passed < to_us);
++
++	printk(KERN_ERR "cf-mips:  wait not busy timeout (%dus)"
++	       ", status 0x%02x, state %d\n",
++	       to_us, (unsigned) rareg(ATA_REG_ST,dev), dev->tstate);
++	return CF_TRANS_FAILED;
++}
++
++static irqreturn_t cf_irq_handler(int irq, void *dev_id)
++{
++	/* While tasklet has not disabled irq, irq will be retried all the time
++	 * because of ILEVEL matching GPIO pin status => deadlock.
++	 * To avoid this, we change ILEVEL to 0.
++	 */
++	struct cf_mips_dev *dev=dev_id;
++	
++	set_gpio_bit(0, ILEVEL, dev);
++	set_gpio_bit(0, ISTAT, dev);
++	
++	del_timer(&dev->to_timer);
++	tasklet_schedule(&dev->tasklet);
++	return IRQ_HANDLED;
++}
++
++static int do_reset(struct cf_mips_dev *dev)
++{
++	printk(KERN_INFO "cf-mips: resetting..\n");
++
++	wareg(ATA_REG_DC_SRST, ATA_REG_DC,dev);
++	udelay(1);		/* FIXME: how long should we wait here? */
++	wareg(0, ATA_REG_DC,dev);
++
++	return wait_not_busy(30 * SECS, 1,dev);
++}
++
++static int set_multiple(struct cf_mips_dev *dev)
++{
++	if (dev->block_size <= 1)
++		return CF_TRANS_OK;
++
++	wareg(dev->block_size, ATA_REG_SC,dev);
++	wareg(ATA_REG_DH_BASE | ATA_REG_DH_LBA, ATA_REG_DH,dev);
++	wareg(ATA_CMD_SET_MULTIPLE, ATA_REG_CMD,dev);
++
++	return wait_not_busy(10 * SECS, 1,dev);
++}
++
++static int set_cmd(struct cf_mips_dev *dev)
++{
++	//DEBUGP(KERN_INFO "cf-mips: ata cmd 0x%02x\n", dev->tcmd);
++	// sector_count should be <=24 bits..
++	BUG_ON(dev->tsect_start>=0x10000000);
++	// This way, it addresses 2^24 * 512 = 128G
++
++	if (dev->tsector_count) {
++		wareg(dev->tsector_count & 0xff, ATA_REG_SC,dev);
++		wareg(dev->tsect_start & 0xff, ATA_REG_SN,dev);
++		wareg((dev->tsect_start >> 8) & 0xff, ATA_REG_CL,dev);
++		wareg((dev->tsect_start >> 16) & 0xff, ATA_REG_CH,dev);
++	}
++	wareg(((dev->tsect_start >> 24) & 0x0f) | ATA_REG_DH_BASE | ATA_REG_DH_LBA,
++	      ATA_REG_DH,dev);	/* select drive on all commands */
++	wareg(dev->tcmd, ATA_REG_CMD,dev);
++	return wait_not_busy(10 * SECS, 1,dev);
++}
++
++static int do_trans(struct cf_mips_dev *dev)
++{
++	int res;
++	unsigned st;
++	int transfered;
++	
++	//printk("do_trans: %d sectors left\n",dev->tsectors_left);
++	while (dev->tsectors_left) {
++		transfered = 0;
++
++		st = rareg(ATA_REG_ST,dev);
++		if (!(st & ATA_REG_ST_DRQ)) {
++			printk(KERN_ERR "cf-mips: do_trans without DRQ (status 0x%x)!\n", st);
++			if (st & ATA_REG_ST_ERR) {
++				int errId = rareg(ATA_REG_ERR,dev);
++				printk(KERN_ERR "cf-mips: %s error, status 0x%x, errid 0x%x\n",
++				       (dev->tread ? "read" : "write"), st, errId);
++			}
++			return CF_TRANS_FAILED;
++		}
++		do { /* Fill/read the buffer one block */
++			u32 *qbuf, *qend;
++			qbuf = (u32 *)dev->tbuf;
++			qend = qbuf + CF_SECT_SIZE / sizeof(u32);
++			if (dev->tread) {
++			    while (qbuf!=qend)
++				put_unaligned(*DBUF32,qbuf++);
++				//*(qbuf++) = *DBUF32;
++			}
++			else {
++			    while(qbuf!=qend)
++				*DBUF32 = get_unaligned(qbuf++);
++			}
++
++			dev->tsectors_left--;
++			dev->tbuf += CF_SECT_SIZE;
++			dev->tbuf_size -= CF_SECT_SIZE;
++			transfered++;
++		} while (transfered != dev->block_size && dev->tsectors_left > 0);
++
++		res = wait_not_busy(10 * SECS, 1,dev);
++		if (res != CF_TRANS_OK)
++			return res;
++	};
++
++	st = rareg(ATA_REG_ST,dev);
++	if (st & (ATA_REG_ST_DRQ | ATA_REG_ST_DWF | ATA_REG_ST_ERR)) {
++		if (st & ATA_REG_ST_DRQ) {
++			printk(KERN_ERR "cf-mips: DRQ after all %d sectors are %s"
++			       ", status 0x%x\n", dev->tsector_count, (dev->tread ? "read" : "written"), st);
++		} else if (st & ATA_REG_ST_DWF) {
++			printk(KERN_ERR "cf-mips: write fault, status 0x%x\n", st);
++		} else {
++			int errId = rareg(ATA_REG_ERR,dev);
++			printk(KERN_ERR "cf-mips: %s error, status 0x%x, errid 0x%x\n",
++			       (dev->tread ? "read" : "write"), st, errId);
++		}
++		return CF_TRANS_FAILED;
++	}
++	return CF_TRANS_OK;
++}
++
++static int cf_do_state(struct cf_mips_dev *dev)
++{
++	int res;
++	switch (dev->tstate) {	/* fall through everywhere */
++	case TS_IDLE:
++		dev->tstate = TS_READY;
++		if (is_busy(dev)) {
++			dev->tstate = TS_AFTER_RESET;
++			res = do_reset(dev);
++			if (res != CF_TRANS_OK)
++				break;
++		}
++	case TS_AFTER_RESET:
++		if (dev->tstate == TS_AFTER_RESET) {
++			dev->tstate = TS_READY;
++			res = set_multiple(dev);
++			if (res != CF_TRANS_OK)
++				break;
++		}
++	case TS_READY:
++		dev->tstate = TS_CMD;
++		res = set_cmd(dev);
++		if (res != CF_TRANS_OK)
++			break;;
++	case TS_CMD:
++		dev->tstate = TS_TRANS;
++	case TS_TRANS:
++		res = do_trans(dev);
++		break;
++	default:
++		printk(KERN_ERR "cf-mips: BUG: unknown tstate %d\n", dev->tstate);
++		return CF_TRANS_FAILED;
++	}
++	if (res != CF_TRANS_IN_PROGRESS)
++		dev->tstate = TS_IDLE;
++	return res;
++}
++
++static void cf_do_tasklet(unsigned long dev_l)
++{
++	struct cf_mips_dev* dev=(struct cf_mips_dev*) dev_l;
++	int res;
++
++	disable_irq(dev->irq);
++
++	if (dev->tstate == TS_IDLE)
++		return;		/* can happen when irq is first registered */
++
++#if 0
++	DEBUGP(KERN_WARNING "cf-mips:   not busy ok (tasklet)  status 0x%02x\n",
++	       (unsigned) rareg(ATA_REG_ST,dev));
++#endif
++
++	res = cf_do_state(dev);
++	if (res == CF_TRANS_IN_PROGRESS)
++		return;
++	cf_async_trans_done(dev,res);
++}
++
++static void cf_async_timeout(unsigned long dev_l)
++{
++	struct cf_mips_dev* dev=(struct cf_mips_dev*) dev_l;
++	disable_irq(dev->irq);
++	/* Perhaps send abort to the device? */
++	printk(KERN_ERR "cf-mips:  wait not busy timeout (%lus)"
++	       ", status 0x%02x, state %d\n",
++	       jiffies - dev->irq_enable_time, (unsigned) rareg(ATA_REG_ST,dev), dev->tstate);
++	dev->tstate = TS_IDLE;
++	cf_async_trans_done(dev,CF_TRANS_FAILED);
++}
++
++int cf_do_transfer(struct cf_mips_dev* dev,sector_t sector, unsigned long nsect, 
++	char* buffer, int is_write)
++{
++	BUG_ON(dev->tstate!=TS_IDLE);
++	if (nsect > ATA_MAX_SECT_PER_CMD) {
++		printk(KERN_WARNING "cf-mips: sector count %lu out of range\n",nsect);
++		return CF_TRANS_FAILED;
++	}
++	if (sector + nsect > dev->sectors) {
++		printk(KERN_WARNING "cf-mips: sector %lu out of range\n",sector);
++		return CF_TRANS_FAILED;
++	}
++	dev->tbuf = buffer;
++	dev->tbuf_size = nsect*512;
++	dev->tsect_start = sector;
++	dev->tsector_count = nsect;
++	dev->tsectors_left = dev->tsector_count;
++	dev->tread = (is_write)?0:1;
++	
++	dev->tcmd = (dev->block_size == 1 ?
++		(is_write ? ATA_CMD_WRITE_SECTORS : ATA_CMD_READ_SECTORS) :
++		(is_write ? ATA_CMD_WRITE_MULTIPLE : ATA_CMD_READ_MULTIPLE));
++
++	return cf_do_state(dev);
++}
++
++static int do_identify(struct cf_mips_dev *dev)
++{
++	u16 sbuf[CF_SECT_SIZE >> 1];
++ 	int res;
++	char tstr[17]; //serial
++	BUG_ON(dev->tstate!=TS_IDLE);
++	dev->tbuf = (char *) sbuf;
++	dev->tbuf_size = CF_SECT_SIZE;
++	dev->tsect_start = 0;
++	dev->tsector_count = 0;
++	dev->tsectors_left = 1;
++	dev->tread = 1;
++	dev->tcmd = ATA_CMD_IDENTIFY_DRIVE;
++
++	DEBUGP(KERN_INFO "cf-mips: identify drive..\n");
++	res = cf_do_state(dev);
++	if (res == CF_TRANS_IN_PROGRESS) {
++		printk(KERN_ERR "cf-mips: BUG: async identify cmd\n");
++		return CF_TRANS_FAILED;
++	}
++	if (res != CF_TRANS_OK)
++		return 0;
++
++	dev->head = sbuf[3];
++	dev->cyl = sbuf[1];
++	dev->spt = sbuf[6];
++	dev->sectors = ((unsigned long) sbuf[7] << 16) | sbuf[8];
++	dev->dtype=sbuf[0];
++	memcpy(tstr,&sbuf[12],16);
++	tstr[16]=0;
++	printk(KERN_INFO "cf-mips: %s detected, C/H/S=%d/%d/%d sectors=%u (%uMB) Serial=%s\n",
++	       (sbuf[0] == 0x848A ? "CF card" : "ATA drive"), dev->cyl, dev->head,
++	       dev->spt, dev->sectors, dev->sectors >> 11,tstr);
++	return 1;
++}
++
++static void init_multiple(struct cf_mips_dev * dev)
++{
++	int res;
++	DEBUGP(KERN_INFO "cf-mips: detecting block size\n");
++
++	dev->block_size = 128;	/* max block size = 128 sectors (64KB) */
++	do {
++		wareg(dev->block_size, ATA_REG_SC,dev);
++		wareg(ATA_REG_DH_BASE | ATA_REG_DH_LBA, ATA_REG_DH,dev);
++		wareg(ATA_CMD_SET_MULTIPLE, ATA_REG_CMD,dev);
++
++		res = wait_not_busy(10 * SECS, 1,dev);
++		if (res != CF_TRANS_OK) {
++			printk(KERN_ERR "cf-mips: failed to detect block size: busy!\n");
++			dev->block_size = 1;
++			return;
++		}
++		if ((rareg(ATA_REG_ST,dev) & ATA_REG_ST_ERR) == 0)
++			break;
++		dev->block_size /= 2;
++	} while (dev->block_size > 1);
++
++	printk(KERN_INFO "cf-mips: multiple sectors = %d\n", dev->block_size);
++}
++
++int cf_init(struct cf_mips_dev *dev)
++{
++	tasklet_init(&dev->tasklet,cf_do_tasklet,(unsigned long)dev);
++	dev->baddr = ioremap_nocache((unsigned long)dev->base, CFDEV_BUF_SIZE);
++	if (!dev->baddr) {
++		printk(KERN_ERR "cf-mips: cf_init: ioremap for (%lx,%x) failed\n",
++		       (unsigned long) dev->base, CFDEV_BUF_SIZE);
++		return -EBUSY;
++	}
++
++	if (!cf_present(dev)) {
++		printk(KERN_WARNING "cf-mips: cf card not present\n");
++		iounmap(dev->baddr);
++		return -ENODEV;
++	}
++
++	if (do_reset(dev) != CF_TRANS_OK) {
++		printk(KERN_ERR "cf-mips: cf reset failed\n");
++		iounmap(dev->baddr);
++		return -EBUSY;
++	}
++
++	if (!do_identify(dev)) {
++		printk(KERN_ERR "cf-mips: cf identify failed\n");
++		iounmap(dev->baddr);
++		return -EBUSY;
++	}
++
++/*	set_apm_level(ATA_APM_WITH_STANDBY); */
++	init_multiple(dev);
++
++	init_timer(&dev->to_timer);
++	dev->to_timer.function = cf_async_timeout;
++	dev->to_timer.data = (unsigned long)dev;
++
++	prepare_cf_irq(dev);
++	if (request_irq(dev->irq, cf_irq_handler, 0, "CF Mips", dev)) {
++		printk(KERN_ERR "cf-mips: failed to get irq\n");
++		iounmap(dev->baddr);
++		return -EBUSY;
++	}
++	/* Disable below would be odd, because request will enable, and the tasklet
++	  will disable it itself */
++	//disable_irq(dev->irq);
++	
++	dev->async_mode = 1;
++
++	return 0;
++}
++
++void cf_cleanup(struct cf_mips_dev *dev)
++{
++	iounmap(dev->baddr);
++	free_irq(dev->irq, NULL);
++#if REQUEST_MEM_REGION
++	release_mem_region((unsigned long)dev->base, CFDEV_BUF_SIZE);
++#endif
++}
++
++
++/*eof*/
+diff -urN linux.old/drivers/block/rb500/ata.h linux.dev/drivers/block/rb500/ata.h
+--- linux.old/drivers/block/rb500/ata.h	1970-01-01 01:00:00.000000000 +0100
++++ linux.dev/drivers/block/rb500/ata.h	2006-10-26 00:11:14.000000000 +0200
+@@ -0,0 +1,143 @@
++/* CF-mips driver
++   This is a block driver for the direct (mmaped) interface to the CF-slot,
++   found in Routerboard.com's RB532 board
++   See SDK provided from routerboard.com.
++   
++   Module adapted By P.Christeas <p_christeas@yahoo.com>, 2005-6.
++   Cleaned up and adapted to platform_device by Felix Fietkau <nbd@openwrt.org>
++
++   This work is redistributed under the terms of the GNU General Public License.
++*/
++
++#ifndef __CFMIPS_ATA_H__
++#define __CFMIPS_ATA_H__
++
++#include <linux/interrupt.h>
++
++#define CFG_DC_DEV1	(void*)0xb8010010
++#define   CFG_DC_DEVBASE	0x0
++#define   CFG_DC_DEVMASK	0x4
++#define   CFG_DC_DEVC		0x8
++#define   CFG_DC_DEVTC		0xC
++
++#define CFDEV_BUF_SIZE	0x1000
++#define ATA_CIS_OFFSET	0x200
++#define ATA_REG_OFFSET	0x800
++#define ATA_DBUF_OFFSET	0xC00
++
++#define ATA_REG_FEAT	0x1
++#define ATA_REG_SC	0x2
++#define ATA_REG_SN	0x3
++#define ATA_REG_CL	0x4
++#define ATA_REG_CH	0x5
++#define ATA_REG_DH	0x6
++#define   ATA_REG_DH_BASE	0xa0
++#define   ATA_REG_DH_LBA	0x40
++#define   ATA_REG_DH_DRV	0x10
++#define ATA_REG_CMD	0x7
++#define ATA_REG_ST	0x7
++#define   ATA_REG_ST_BUSY	0x80
++#define   ATA_REG_ST_RDY	0x40
++#define   ATA_REG_ST_DWF	0x20
++#define   ATA_REG_ST_DSC	0x10
++#define   ATA_REG_ST_DRQ	0x08
++#define   ATA_REG_ST_CORR	0x04
++#define   ATA_REG_ST_ERR	0x01
++#define ATA_REG_ERR	0xd
++#define ATA_REG_DC	0xe
++#define   ATA_REG_DC_IEN	0x02
++#define   ATA_REG_DC_SRST	0x04
++
++#define ATA_CMD_READ_SECTORS	0x20
++#define ATA_CMD_WRITE_SECTORS	0x30
++#define ATA_CMD_EXEC_DRIVE_DIAG	0x90
++#define ATA_CMD_READ_MULTIPLE	0xC4
++#define ATA_CMD_WRITE_MULTIPLE	0xC5
++#define ATA_CMD_SET_MULTIPLE	0xC6
++#define ATA_CMD_IDENTIFY_DRIVE	0xEC
++#define ATA_CMD_SET_FEATURES	0xEF
++
++#define ATA_FEATURE_ENABLE_APM	0x05
++#define ATA_FEATURE_DISABLE_APM	0x85
++#define ATA_APM_DISABLED	0x00
++#define ATA_APM_MIN_POWER	0x01
++#define ATA_APM_WITH_STANDBY	0x7f
++#define ATA_APM_WITHOUT_STANDBY	0x80
++#define ATA_APM_MAX_PERFORMANCE	0xfe
++
++#define CF_SECT_SIZE	0x200
++/* That is the ratio CF_SECT_SIZE/512 (the kernel sector size) */
++#define CF_KERNEL_MUL	1
++#define ATA_MAX_SECT_PER_CMD	0x100
++
++#define CF_TRANS_FAILED		0
++#define CF_TRANS_OK		1
++#define CF_TRANS_IN_PROGRESS	2
++
++
++enum trans_state {
++	TS_IDLE = 0,
++	TS_AFTER_RESET,
++	TS_READY,
++	TS_CMD,
++	TS_TRANS
++};
++
++// 
++// #if DEBUG
++// static unsigned long busy_time;
++// #endif
++
++/** Struct to hold the cfdev
++Actually, all the data here only has one instance. However, for 
++reasons of programming conformity, it is passed around as a pointer
++*/
++struct cf_mips_dev {
++	void *base; /* base address for I/O */
++	void *baddr; /* remapped address */
++
++	int pin; /* gpio pin */
++	int irq; /* gpio irq */
++	
++	unsigned head;
++	unsigned cyl;
++	unsigned spt;
++	unsigned sectors;
++	
++	unsigned short block_size;
++	unsigned dtype ; // ATA or CF
++	struct request_queue *queue;
++	struct gendisk  *gd;
++	
++	/* Transaction state */
++	enum trans_state tstate;
++	char *tbuf;
++	unsigned long tbuf_size;
++	sector_t tsect_start;
++	unsigned tsector_count;
++	unsigned tsectors_left;
++	int tread;
++	unsigned tcmd;
++	int async_mode;
++	unsigned long irq_enable_time;
++	
++	struct request *active_req; /* A request is being carried out. Is that different from tstate? */
++	int users;
++	struct timer_list to_timer;
++	struct tasklet_struct tasklet;
++
++	/** This lock ensures that the requests to this device are all done
++	atomically. Transfers can run in parallel, requests are all queued
++	one-by-one */
++	spinlock_t lock;
++};
++
++int cf_do_transfer(struct cf_mips_dev* dev,sector_t sector, unsigned long nsect, 
++	char* buffer, int is_write);
++int cf_init(struct cf_mips_dev* dev);
++void cf_cleanup(struct cf_mips_dev* dev);
++
++void cf_async_trans_done(struct cf_mips_dev* dev, int result);
++// void *cf_get_next_buf(unsigned long *buf_size);
++
++#endif
+diff -urN linux.old/drivers/block/rb500/bdev.c linux.dev/drivers/block/rb500/bdev.c
+--- linux.old/drivers/block/rb500/bdev.c	1970-01-01 01:00:00.000000000 +0100
++++ linux.dev/drivers/block/rb500/bdev.c	2006-10-26 00:11:14.000000000 +0200
+@@ -0,0 +1,339 @@
++/* CF-mips driver
++   This is a block driver for the direct (mmaped) interface to the CF-slot,
++   found in Routerboard.com's RB532 board
++   See SDK provided from routerboard.com.
++   
++   Module adapted By P.Christeas <p_christeas@yahoo.com>, 2005-6.
++   Cleaned up and adapted to platform_device by Felix Fietkau <nbd@openwrt.org>
++
++   This work is redistributed under the terms of the GNU General Public License.
++*/
++
++#include <linux/kernel.h>
++#include <linux/module.h>
++#include <linux/init.h>
++#include <linux/time.h>
++#include <linux/wait.h>
++#include <linux/fs.h>
++#include <linux/genhd.h>
++#include <linux/blkdev.h>
++#include <linux/blkpg.h>
++#include <linux/hdreg.h>
++#include <linux/platform_device.h>
++
++#include <asm/uaccess.h>
++#include <asm/io.h>
++
++#include <asm/rc32434/rb.h>
++
++#ifdef DEBUG
++#define DEBUGP printk
++#define DLEVEL 1
++#else
++#define DEBUGP(format, args...)
++#define DLEVEL 0
++#endif
++
++#define CF_MIPS_MAJOR 13
++#define MAJOR_NR	CF_MIPS_MAJOR
++#define CF_MAX_PART	16		/* max 15 partitions */
++
++#include "ata.h"
++
++//extern struct block_device_operations cf_bdops;
++
++// static struct hd_struct cf_parts[CF_MAX_PART];
++// static int cf_part_sizes[CF_MAX_PART];
++// static int cf_hsect_sizes[CF_MAX_PART];
++// static int cf_max_sectors[CF_MAX_PART];
++// static int cf_blksize_sizes[CF_MAX_PART];
++
++// static spinlock_t lock = SPIN_LOCK_UNLOCKED;
++
++// volatile int cf_busy = 0;
++
++static struct request *active_req = NULL;
++
++static int cf_open (struct inode *, struct file *);
++static int cf_release (struct inode *, struct file *);
++static int cf_ioctl (struct inode *, struct file *, unsigned, unsigned long);
++
++static void cf_request(request_queue_t * q);
++static int cf_transfer(const struct request *req);
++
++/*long (*unlocked_ioctl) (struct file *, unsigned, unsigned long);
++long (*compat_ioctl) (struct file *, unsigned, unsigned long);*/
++// int (*direct_access) (struct block_device *, sector_t, unsigned long *);
++// int (*media_changed) (struct gendisk *);
++// int (*revalidate_disk) (struct gendisk *);
++
++static struct block_device_operations cf_bdops = {
++      .owner = THIS_MODULE,
++      .open = cf_open,
++      .release = cf_release,
++      .ioctl = cf_ioctl,
++      .media_changed = NULL,
++      .unlocked_ioctl = NULL,
++      .revalidate_disk = NULL,
++      .compat_ioctl = NULL,
++      .direct_access = NULL
++};
++
++
++int cf_mips_probe(struct platform_device *pdev)
++{
++	struct gendisk* cf_gendisk=NULL;
++	struct cf_device *cdev = (struct cf_device *) pdev->dev.platform_data;
++	struct cf_mips_dev *dev;
++	struct resource *r;
++	int reg_result;
++
++	reg_result = register_blkdev(MAJOR_NR, "cf-mips");
++	if (reg_result < 0) {
++		printk(KERN_WARNING "cf-mips: can't get major %d\n", MAJOR_NR);
++		return reg_result;
++	}
++
++	dev = (struct cf_mips_dev *)kmalloc(sizeof(struct cf_mips_dev),GFP_KERNEL);
++	if (!dev)
++		goto out_err;
++	memset(dev, 0, sizeof(struct cf_mips_dev));
++	cdev->dev = dev;
++	
++	dev->pin = cdev->gpio_pin;
++	dev->irq = platform_get_irq_byname(pdev, "cf_irq");
++	r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "cf_membase");
++	dev->base = (void *) r->start;
++	
++	if (cf_init(dev)) goto out_err;
++	printk("init done");
++	
++	spin_lock_init(&dev->lock);
++	dev->queue = blk_init_queue(cf_request,&dev->lock);
++	if (!dev->queue){
++		printk(KERN_ERR "cf-mips: no mem for queue\n");
++		goto out_err;
++	}
++	blk_queue_max_sectors(dev->queue,ATA_MAX_SECT_PER_CMD);
++
++	/* For memory devices, it is always better to avoid crossing segments
++	inside the same request. */
++/*	if (dev->dtype==0x848A){
++		printk(KERN_INFO "Setting boundary for cf to 0x%x",(dev->block_size*512)-1);
++		blk_queue_segment_boundary(dev->queue, (dev->block_size*512)-1);
++	}*/
++
++	dev->gd = alloc_disk(CF_MAX_PART);
++	cf_gendisk = dev->gd;
++	cdev->gd = dev->gd;
++	if (!cf_gendisk) goto out_err; /* Last of these goto's */
++	
++	cf_gendisk->major = MAJOR_NR;
++	cf_gendisk->first_minor = 0;
++	cf_gendisk->queue=dev->queue;
++	BUG_ON(cf_gendisk->minors != CF_MAX_PART);
++	strcpy(cf_gendisk->disk_name,"cfa");
++	cf_gendisk->fops = &cf_bdops;
++	cf_gendisk->flags = 0 ; /* is not yet GENHD_FL_REMOVABLE */
++	cf_gendisk->private_data=dev;
++	
++	set_capacity(cf_gendisk,dev->sectors * CF_KERNEL_MUL);
++	
++	/* Let the disk go live */
++	add_disk(cf_gendisk);
++#if 0
++	result = cf_init();
++	
++	/* default cfg for all partitions */
++	memset(cf_parts, 0, sizeof (cf_parts[0]) * CF_MAX_PART);
++	memset(cf_part_sizes, 0, sizeof (cf_part_sizes[0]) * CF_MAX_PART);
++	for (i = 0; i < CF_MAX_PART; ++i) {
++		cf_hsect_sizes[i] = CF_SECT_SIZE;
++		cf_max_sectors[i] = ATA_MAX_SECT_PER_CMD;
++		cf_blksize_sizes[i] = BLOCK_SIZE;
++	}
++
++	/* setup info for whole disk (partition 0) */
++	cf_part_sizes[0] = cf_sectors / 2;
++	cf_parts[0].nr_sects = cf_sectors;
++
++	blk_size[MAJOR_NR] = cf_part_sizes;
++	blksize_size[MAJOR_NR] = cf_blksize_sizes;
++	max_sectors[MAJOR_NR] = cf_max_sectors;
++	hardsect_size[MAJOR_NR] = cf_hsect_sizes;
++	read_ahead[MAJOR_NR] = 8;	/* (4kB) */
++
++	blk_init_queue(BLK_DEFAULT_QUEUE(MAJOR_NR), DEVICE_REQUEST);
++
++	add_gendisk(&cf_gendisk);
++#endif
++// 	printk(KERN_INFO "cf-mips partition check: \n");
++// 	register_disk(cf_gendisk, MKDEV(MAJOR_NR, 0), CF_MAX_PART,
++// 		      &cf_bdops, dev->sectors);
++	return 0;
++
++out_err:
++	if (dev->queue){
++		blk_cleanup_queue(dev->queue);
++	}
++	if (reg_result) {
++		unregister_blkdev(MAJOR_NR, "cf-mips");
++		return reg_result;
++	}
++	if (dev){
++		cf_cleanup(dev);
++		kfree(dev);
++	}
++	return 1;
++}
++
++static int
++cf_mips_remove(struct platform_device *pdev)
++{
++	struct cf_device *cdev = (struct cf_device *) pdev->dev.platform_data;
++	struct cf_mips_dev *dev = (struct cf_mips_dev *) cdev->dev;
++	
++	unregister_blkdev(MAJOR_NR, "cf-mips");
++	blk_cleanup_queue(dev->queue);
++
++	del_gendisk(dev->gd);
++	cf_cleanup(dev);
++	return 0;
++}
++
++
++static struct platform_driver cf_driver = {
++	.driver.name = "rb500-cf",
++	.probe = cf_mips_probe,
++	.remove = cf_mips_remove,
++};
++
++static int __init cf_mips_init(void)
++{
++	printk(KERN_INFO "cf-mips module loaded\n");
++	return platform_driver_register(&cf_driver);
++}
++
++static void cf_mips_cleanup(void)
++{
++	platform_driver_unregister(&cf_driver);
++	printk(KERN_INFO "cf-mips module removed\n");
++}
++
++module_init(cf_mips_init);
++module_exit(cf_mips_cleanup);
++
++MODULE_LICENSE("GPL");
++MODULE_ALIAS_BLOCKDEV_MAJOR(CF_MIPS_MAJOR);
++
++
++static int cf_open(struct inode *inode, struct file *filp)
++{
++	struct cf_mips_dev  *dev=inode->i_bdev->bd_disk->private_data;
++	int minor = MINOR(inode->i_rdev);
++	
++	if (minor >= CF_MAX_PART)
++		return -ENODEV;
++	//DEBUGP(KERN_INFO "cf-mips module opened, minor %d\n", minor);
++	spin_lock(&dev->lock);
++	dev->users++;
++	spin_unlock(&dev->lock);
++	filp->private_data=dev;
++	
++	/* dirty workaround to set CFRDY GPIO as an input when some other
++	   program sets it as an output */
++	gpio_set(CFG, (1 << dev->pin), 0);
++	return 0;		/* success */
++}
++
++static int cf_release(struct inode *inode, struct file *filp)
++{
++	int minor = MINOR(inode->i_rdev);
++	struct cf_mips_dev  *dev=inode->i_bdev->bd_disk->private_data;
++	spin_lock(&dev->lock);
++	dev->users--;
++	spin_unlock(&dev->lock);
++	return 0;
++}
++
++static int cf_ioctl(struct inode *inode, struct file *filp,
++	 unsigned int cmd, unsigned long arg)
++{
++	unsigned minor = MINOR(inode->i_rdev);
++	struct cf_mips_dev  *dev=inode->i_bdev->bd_disk->private_data;
++
++	DEBUGP(KERN_INFO "cf_ioctl cmd %u\n", cmd);
++	switch (cmd) {
++	case BLKRRPART:	/* re-read partition table */
++		if (!capable(CAP_SYS_ADMIN))
++			return -EACCES;
++		printk(KERN_INFO "cf-mips partition check: \n");
++		register_disk(dev->gd);
++		return 0;
++
++	case HDIO_GETGEO:
++		{
++			struct hd_geometry geo;
++			geo.cylinders = dev->cyl;
++			geo.heads = dev->head;
++			geo.sectors = dev->spt;
++			geo.start = (*dev->gd->part)[minor].start_sect;
++			if (copy_to_user((void *) arg, &geo, sizeof (geo)))
++				return -EFAULT;
++		}
++		return 0;
++	}
++
++	return -EINVAL;		/* unknown command */
++}
++
++static void cf_request(request_queue_t * q)
++{
++	struct cf_mips_dev* dev;
++	
++	struct request * req;
++	int status;
++
++	/* We could have q->queuedata = dev , but haven't yet. */
++	if (active_req)
++		return;
++
++	while ((req=elv_next_request(q))!=NULL){
++		dev=req->rq_disk->private_data;
++		status=cf_transfer(req);
++		if (status==CF_TRANS_IN_PROGRESS){
++			active_req=req;
++			return;
++		}
++		end_request(req,status);
++	}
++}
++
++static int cf_transfer(const struct request *req)
++{
++	struct cf_mips_dev* dev=req->rq_disk->private_data;
++
++	if (!blk_fs_request(req)){	
++		if (printk_ratelimit())
++			printk(KERN_WARNING "cf-mips: skipping non-fs request 0x%x\n",req->cmd[0]);
++		return CF_TRANS_FAILED;
++	}
++	
++	return cf_do_transfer(dev,req->sector,req->current_nr_sectors,req->buffer,rq_data_dir(req));
++}
++
++void cf_async_trans_done(struct cf_mips_dev * dev,int result)
++{
++	struct request *req;
++	
++	spin_lock(&dev->lock);
++	req=active_req;
++	active_req=NULL;
++	end_request(req,result);
++	spin_unlock(&dev->lock);
++
++	spin_lock(&dev->lock);
++	cf_request(dev->queue);
++	spin_unlock(&dev->lock);
++}
++
+diff -urN linux.old/drivers/block/rb500/Makefile linux.dev/drivers/block/rb500/Makefile
+--- linux.old/drivers/block/rb500/Makefile	1970-01-01 01:00:00.000000000 +0100
++++ linux.dev/drivers/block/rb500/Makefile	2006-10-26 00:11:14.000000000 +0200
+@@ -0,0 +1,3 @@
++## Makefile for the RB532 CF port
++
++obj-y		+= bdev.o ata.o