Add preliminary support for the Routerboard 153 CF slot (#2550)

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@9403 3c298f89-4303-0410-b956-a3cf2f4a3e73

9 files changed, 1079 insertions, 2 deletions

diff --git a/target/linux/adm5120/files/arch/mips/adm5120/boards/mikrotik.c b/target/linux/adm5120/files/arch/mips/adm5120/boards/mikrotik.c
index 64c32c623..74dd860dc 100644
--- a/target/linux/adm5120/files/arch/mips/adm5120/boards/mikrotik.c
+++ b/target/linux/adm5120/files/arch/mips/adm5120/boards/mikrotik.c
@@ -42,6 +42,7 @@
 #include <adm5120_nand.h>
 #include <adm5120_board.h>
 #include <adm5120_platform.h>
+#include <adm5120_cf.h>
 
 #define RB1XX_NAND_CHIP_DELAY	25
 
@@ -178,6 +179,35 @@ static void rb150_nand_cmd_ctrl(struct mtd_info *mtd, int cmd,
 }
 
 /*--------------------------------------------------------------------------*/
+static struct resource cf_slot0_res[] = {
+        {
+                .name = "cf_membase",
+                .flags = IORESOURCE_MEM
+        }, {
+                .name = "cf_irq",
+                .start = INTC_IRQ_GPIO4, /* 5 */
+                .end = INTC_IRQ_GPIO4,
+                .flags = IORESOURCE_IRQ
+        }
+};
+
+static struct cf_device cf_slot0_data = {
+        .gpio_pin = 4
+};
+
+static struct platform_device cf_slot0 = {
+        .id = 0,
+        .name = "rb153-cf",
+        .dev.platform_data = &cf_slot0_data,
+        .resource = cf_slot0_res,
+        .num_resources = ARRAY_SIZE(cf_slot0_res),
+};
+
+static struct platform_device *rb153_devices[] __initdata = {
+        &adm5120_flash0_device,
+        &adm5120_nand_device,
+	&cf_slot0,
+};
 
 static void __init rb1xx_mac_setup(void)
 {
@@ -299,8 +329,8 @@ static struct adm5120_board rb153_board __initdata = {
 	.board_setup	= rb1xx_setup,
 	.eth_num_ports	= 5,
 	.eth_vlans	= rb15x_vlans,
-	.num_devices	= ARRAY_SIZE(rb1xx_devices),
-	.devices	= rb1xx_devices,
+	.num_devices	= ARRAY_SIZE(rb153_devices),
+	.devices	= rb153_devices,
 	.pci_nr_irqs	= ARRAY_SIZE(rb1xx_pci_irqs),
 	.pci_irq_map	= rb1xx_pci_irqs,
 };
diff --git a/target/linux/adm5120/files/drivers/block/rb1xx/Makefile b/target/linux/adm5120/files/drivers/block/rb1xx/Makefile
new file mode 100644
index 000000000..672aaa697
--- /dev/null
+++ b/target/linux/adm5120/files/drivers/block/rb1xx/Makefile
@@ -0,0 +1,2 @@
+## Makefile for the RB1xx CF port
+obj-y		+= bdev.o ata.o
diff --git a/target/linux/adm5120/files/drivers/block/rb1xx/ata.c b/target/linux/adm5120/files/drivers/block/rb1xx/ata.c
new file mode 100644
index 000000000..c73d21958
--- /dev/null
+++ b/target/linux/adm5120/files/drivers/block/rb1xx/ata.c
@@ -0,0 +1,507 @@
+/* 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 <gpio.h>
+#include <adm5120_defs.h>
+#include <adm5120_irq.h>
+#include <adm5120_switch.h>
+#include <adm5120_intc.h>
+#include <adm5120_mpmc.h>
+#include <adm5120_cf.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;
+
+#define DBUF32 ((volatile u32 *)((unsigned long)dev->baddr | ATA_DBUF_OFFSET))
+
+#define INTC_WRITE(reg, val)    __raw_writel((val), \
+        (void __iomem *)(KSEG1ADDR(ADM5120_INTC_BASE) + reg))
+
+#define INTC_READ(reg)          __raw_readl(\
+        (void __iomem *)(KSEG1ADDR(ADM5120_INTC_BASE) + reg))
+
+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 cfrdy(struct cf_mips_dev *dev)
+{
+	return (SW_READ_REG(GPIO_CONF0) & (1 << ADM5120_GPIO_PIN4));
+}
+
+static inline void prepare_cf_irq(struct cf_mips_dev *dev)
+{
+	/* interrupt on cf ready (not busy) */
+	INTC_WRITE(INTC_REG_INT_LEVEL, INTC_READ(INTC_REG_INT_LEVEL) | ADM5120_CF_IRQ_LEVEL_BIT);
+
+	/* FIXME: how to 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
+	 */
+
+	/* FIXME: enabling of EXTIO will be done by BIOS in future */
+	unsigned cmd = EXTIO_CS0_INT0_EN;
+	int i;
+
+	/* on RB100 WAIT is LOW all the time => read will hang */
+	if (SW_READ_REG(GPIO_CONF0) & (1 << ADM5120_GPIO_PIN0))
+		cmd |= EXTIO_WAIT_EN;
+
+	SW_WRITE_REG(GPIO_CONF2, cmd);
+	SW_WRITE_REG(GPIO_CONF0, (SW_READ_REG(GPIO_CONF0) & ~(1 << (16 + ADM5120_CF_GPIO_NUM))));
+	
+	/* FIXME: timings will be set by BIOS in future - remove this */
+	MPMC_WRITE_REG(SC2, 0x88);
+	MPMC_WRITE_REG(WEN2, 0x02);
+	MPMC_WRITE_REG(OEN2, 0x03);
+	MPMC_WRITE_REG(RD2, 0x1a);
+	MPMC_WRITE_REG(PG2, 0x1d);
+	MPMC_WRITE_REG(WR2, 0x14);
+	MPMC_WRITE_REG(TN2, 0x09);
+
+	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;
+
+	if (!cfrdy(dev))
+		return;        // false interrupt (only for ADM5120)
+
+	INTC_WRITE(INTC_REG_INT_LEVEL, (INTC_READ(INTC_REG_INT_LEVEL) & (~ADM5120_CF_IRQ_LEVEL_BIT)));
+		
+	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 --git a/target/linux/adm5120/files/drivers/block/rb1xx/ata.h b/target/linux/adm5120/files/drivers/block/rb1xx/ata.h
new file mode 100644
index 000000000..15e882630
--- /dev/null
+++ b/target/linux/adm5120/files/drivers/block/rb1xx/ata.h
@@ -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 --git a/target/linux/adm5120/files/drivers/block/rb1xx/bdev.c b/target/linux/adm5120/files/drivers/block/rb1xx/bdev.c
new file mode 100644
index 000000000..12c938505
--- /dev/null
+++ b/target/linux/adm5120/files/drivers/block/rb1xx/bdev.c
@@ -0,0 +1,338 @@
+/* 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/mach-adm5120/adm5120_cf.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 = "rb153-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 --git a/target/linux/adm5120/files/include/asm-mips/mach-adm5120/adm5120_cf.h b/target/linux/adm5120/files/include/asm-mips/mach-adm5120/adm5120_cf.h
new file mode 100644
index 000000000..e26e1d419
--- /dev/null
+++ b/target/linux/adm5120/files/include/asm-mips/mach-adm5120/adm5120_cf.h
@@ -0,0 +1,19 @@
+#include <linux/types.h>
+#include <linux/io.h>
+
+#include <adm5120_defs.h>
+#include <adm5120_switch.h>
+
+/* CFRDY is connected to GPIO4/INTX_1 */
+#define ADM5120_CF_GPIO_NUM     4
+#define ADM5120_CF_IRQ_LEVEL_BIT        0x20    /* GPIO4 = 0x20, GPIO2 = 0x10 */
+#define ADM5120_IRQ_CFRDY       5
+#define EXTIO_WAIT_EN		(0x1 << 6)
+#define EXTIO_CS1_INT1_EN	(0x1 << 5)
+#define EXTIO_CS0_INT0_EN	(0x1 << 4)
+
+struct cf_device {
+        int gpio_pin;
+        void *dev;
+        struct gendisk *gd;
+};
diff --git a/target/linux/adm5120/files/include/asm-mips/mach-adm5120/adm5120_mpmc.h b/target/linux/adm5120/files/include/asm-mips/mach-adm5120/adm5120_mpmc.h
index 406d6c563..8209d88a4 100644
--- a/target/linux/adm5120/files/include/asm-mips/mach-adm5120/adm5120_mpmc.h
+++ b/target/linux/adm5120/files/include/asm-mips/mach-adm5120/adm5120_mpmc.h
@@ -49,6 +49,12 @@
 #define MPMC_REG_SC0	0x0200  /* for F_CS1_N */
 #define MPMC_REG_SC1	0x0220  /* for F_CS0_N */
 #define MPMC_REG_SC2    0x0240
+#define MPMC_REG_WEN2	0x0244
+#define MPMC_REG_OEN2	0x0248
+#define MPMC_REG_RD2	0x024C
+#define MPMC_REG_PG2	0x0250
+#define MPMC_REG_WR2	0x0254
+#define MPMC_REG_TN2	0x0258
 #define MPMC_REG_SC3    0x0260
 
 /* Control register bits */
diff --git a/target/linux/adm5120/patches-2.6.23/120-cf.patch b/target/linux/adm5120/patches-2.6.23/120-cf.patch
new file mode 100644
index 000000000..cbfe42d6c
--- /dev/null
+++ b/target/linux/adm5120/patches-2.6.23/120-cf.patch
@@ -0,0 +1,31 @@
+Index: linux-2.6.23/drivers/block/Kconfig
+===================================================================
+--- linux-2.6.23/drivers/block/Kconfig	2007-10-09 22:31:38.000000000 +0200
++++ linux-2.6.23.new/drivers/block/Kconfig	2007-10-22 18:07:49.000000000 +0200
+@@ -65,6 +65,14 @@
+ 	  To compile this driver as a module, choose M here: the
+ 	  module will be called z2ram.
+ 
++config BLK_DEV_CF_MIPS
++	bool "CF slot of RB153 board"
++	depends on MIPS_ADM5120
++	default y
++	help
++	  The Routerboard 153 has a CF slot on it. Enable the special block
++	  device driver for it.
++
+ config BLK_DEV_XD
+ 	tristate "XT hard disk support"
+ 	depends on ISA && ISA_DMA_API
+Index: linux-2.6.23/drivers/block/Makefile
+===================================================================
+--- linux-2.6.23/drivers/block/Makefile	2007-10-09 22:31:38.000000000 +0200
++++ linux-2.6.23.new/drivers/block/Makefile.new	2007-10-22 18:08:15.000000000 +0200
+@@ -7,6 +7,7 @@
+ 
+ obj-$(CONFIG_MAC_FLOPPY)	+= swim3.o
+ obj-$(CONFIG_BLK_DEV_FD)	+= floppy.o
++obj-$(CONFIG_BLK_DEV_CF_MIPS)	+= rb1xx/
+ obj-$(CONFIG_AMIGA_FLOPPY)	+= amiflop.o
+ obj-$(CONFIG_PS3_DISK)		+= ps3disk.o
+ obj-$(CONFIG_ATARI_FLOPPY)	+= ataflop.o
diff --git a/target/linux/adm5120/router_le/config-2.6.23 b/target/linux/adm5120/router_le/config-2.6.23
index da96c7306..4267f70a7 100644
--- a/target/linux/adm5120/router_le/config-2.6.23
+++ b/target/linux/adm5120/router_le/config-2.6.23
@@ -10,6 +10,7 @@ CONFIG_BAYCOM_SER_FDX=m
 CONFIG_BAYCOM_SER_HDX=m
 CONFIG_BINFMT_MISC=m
 CONFIG_BITREVERSE=y
+CONFIG_BLK_DEV_CF_MIPS=y
 CONFIG_CIFS_DEBUG2=y
 CONFIG_CIFS_EXPERIMENTAL=y
 CONFIG_CIFS_STATS2=y