Initial NAND driver for Sansa. This has had limited testing, and no testing on 6 or 8Gb models

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@11567 a1c6a512-1295-4272-9138-f99709370657

2 files changed, 600 insertions, 68 deletions

diff --git a/firmware/target/arm/sandisk/sansa-e200/ata-e200.c b/firmware/target/arm/sandisk/sansa-e200/ata-e200.c
index 0c37753..98d71c2 100644
--- a/firmware/target/arm/sandisk/sansa-e200/ata-e200.c
+++ b/firmware/target/arm/sandisk/sansa-e200/ata-e200.c
@@ -7,7 +7,7 @@
  *                     \/            \/     \/    \/            \/
  * $Id$
  *
- * Copyright (C) 2006 Daniel Stenberg
+ * Copyright (C) 2006 Daniel Ankers
  *
  * All files in this archive are subject to the GNU General Public License.
  * See the file COPYING in the source tree root for full license agreement.
@@ -16,106 +16,461 @@
  * KIND, either express or implied.
  *
  ****************************************************************************/
-
+/* TODO: Add ATA Callback support */
+#include "lcd.h"
 #include "ata.h"
+#include "ata-target.h"
+#include "cpu.h"
+#include "system.h"
+#include <stdio.h>
 #include <stdbool.h>
 #include <string.h>
+#include "kernel.h"
+#include "thread.h"
+
+#define NOINLINE_ATTR __attribute__((noinline)) /* don't inline the loops */
 
+#define BLOCK_SIZE      (512)
 #define SECTOR_SIZE     (512)
 
+#define STATUS_REG      (*(volatile unsigned int *)(0x70008204))
+#define REG_1           (*(volatile unsigned int *)(0x70008208))
+#define UNKNOWN         (*(volatile unsigned int *)(0x70008210))
+#define BLOCK_SIZE_REG  (*(volatile unsigned int *)(0x7000821c))
+#define BLOCK_COUNT_REG (*(volatile unsigned int *)(0x70008220))
+#define REG_5           (*(volatile unsigned int *)(0x70008224))
+#define CMD_REG0        (*(volatile unsigned int *)(0x70008228))
+#define CMD_REG1        (*(volatile unsigned int *)(0x7000822c))
+#define CMD_REG2        (*(volatile unsigned int *)(0x70008230))
+#define RESPONSE_REG    (*(volatile unsigned int *)(0x70008234))
+#define SD_STATE_REG    (*(volatile unsigned int *)(0x70008238))
+#define REG_11          (*(volatile unsigned int *)(0x70008240))
+#define REG_12          (*(volatile unsigned int *)(0x70008244))
+#define DATA_REG        (*(volatile unsigned int *)(0x70008280))
+
+#define DATA_DONE       (1 << 12)
+#define CMD_DONE        (1 << 13)
+#define ERROR_BITS      (0x3f)
+#define FIFO_FULL       (1 << 7)
+#define FIFO_EMPTY      (1 << 6)
+
+/* SD States */
+#define IDLE            0
+#define READY           1
+#define IDENT           2
+#define STBY            3
+#define TRAN            4
+#define DATA            5
+#define RCV             6
+#define PRG             7
+#define DIS             8
+
+#define FIFO_SIZE       16          /* FIFO is 16 words deep */
+
+/* SD Commands */
+#define GO_IDLE_STATE   0
+#define ALL_SEND_CID    2
+#define SEND_RELATIVE_ADDR  3
+#define SET_DSR         4
+#define SWITCH_FUNC     6
+#define SELECT_CARD     7
+#define DESELECT_CARD   7
+#define SEND_CSD        9
+#define SEND_CID        10
+#define STOP_TRANSMISSION   12
+#define SEND_STATUS     13
+#define GO_INACTIVE_STATE   15
+#define SET_BLOCKLEN    16
+#define READ_SINGLE_BLOCK   17
+#define READ_MULTIPLE_BLOCK 18
+#define WRITE_BLOCK     24
+#define WRITE_MULTIPLE_BLOCK    25
+#define ERASE_WR_BLK_START  32
+#define ERASE_WR_BLK_END    33
+#define ERASE           38
+
+/* Application Specific commands */
+#define SET_BUS_WIDTH   6
+#define SD_APP_OP_COND  41
+
+#define READ_TIMEOUT    5*HZ
+#define WRITE_TIMEOUT   0.5*HZ
+
 static unsigned short identify_info[SECTOR_SIZE];
 int ata_spinup_time = 0;
 long last_disk_activity = -1;
+static bool delayed_write = false;
 
-void flash_select_chip(int no, int sel)
-{
-
-}
+static unsigned char current_bank = 0; /* The bank that we are working with */
 
-unsigned char flash_read_data(void)
-{
+static tSDCardInfo card_info[2];
 
-}
+/* For multi volume support */
+static int current_card = 0;
 
-void flash_write_data(unsigned char data)
-{
+static struct mutex ata_mtx;
 
-}
+/* Private Functions */
 
-void flash_write_cmd(unsigned char cmd)
+bool sd_send_command(unsigned int cmd, unsigned long arg1, unsigned int arg2)
 {
-
+    bool result = false;
+    unsigned char cbuf[32];
+    do
+    {
+        CMD_REG0 = cmd;
+        CMD_REG1 = (unsigned int)((arg1 & 0xffff0000) >> 16);
+        CMD_REG2 = (unsigned int)((arg1 & 0xffff));
+        UNKNOWN = arg2;
+        while ((STATUS_REG & CMD_DONE) == 0)
+        {
+            /* Busy wait */
+        }
+        if ((STATUS_REG & ERROR_BITS) == 0)
+        {
+            result = true;
+        } else {
+            snprintf(cbuf, sizeof(cbuf), "%x", (STATUS_REG & ERROR_BITS));
+            lcd_puts(0,10,cbuf);
+            lcd_update();
+        }
+    } while ((STATUS_REG & ERROR_BITS) != 0);
+    return result;
 }
 
-void flash_write_addr(unsigned char addr)
+void sd_read_response(unsigned int *response, int type)
 {
-
+    int i;
+    int words; /* Number of 16 bit words to read from RESPONSE_REG */
+    unsigned int response_from_card[9];
+    if(type == 2)
+    {
+        words = 9; /* R2 types are 8.5 16-bit words long */
+    } else {
+        words = 3;
+    }
+
+    for (i = 0; i < words; i++) /* RESPONSE_REG is read MSB first */
+    {
+            response_from_card[i] = RESPONSE_REG; /* Read most significant 16-bit word */
+    }
+
+    switch (type)
+    {
+        case 1:
+            /* Response type 1 has the following structure:
+                Start bit
+                Transmission bit
+                Command index (6 bits)
+                Card Status (32 bits)
+                CRC7 (7 bits)
+                Stop bit
+            */
+            /* TODO: Sanity checks */
+            response[0] = ((response_from_card[0] & 0xff) << 24)
+                       + (response_from_card[1] << 8)
+                       + ((response_from_card[2] & 0xff00) >> 8);
+            break;
+        case 2:
+            /* Response type 2 has the following structure:
+                Start bit
+                Transmission bit
+                Reserved (6 bits)
+                CSD/CID register (127 bits)
+                Stop bit
+            */
+            response[3] = ((response_from_card[0]&0xff)<<24) +
+                           (response_from_card[1]<<8) +
+                           ((response_from_card[2]&0xff00)>>8);
+            response[2] = ((response_from_card[2]&0xff)<<24) +
+                           (response_from_card[3]<<8) +
+                           ((response_from_card[4]&0xff00)>>8);
+            response[1] = ((response_from_card[4]&0xff)<<24) +
+                           (response_from_card[5]<<8) +
+                           ((response_from_card[6]&0xff00)>>8);
+            response[0] = ((response_from_card[6]&0xff)<<24) +
+                           (response_from_card[7]<<8) +
+                           ((response_from_card[8]&0xff00)>>8);
+            break;
+        case 3:
+            /* Response type 3 has the following structure:
+                Start bit
+                Transmission bit
+                Reserved (6 bits)
+                OCR register (32 bits)
+                Reserved (7 bits)
+                Stop bit
+            */
+            response[0] = ((response_from_card[0] & 0xff) << 24)
+                       + (response_from_card[1] << 8)
+                       + ((response_from_card[2] & 0xff00) >> 8);
+        /* Types 4-6 not supported yet */
+    }
 }
 
-void flash_wait_ready(void)
+bool sd_send_acommand(unsigned int cmd, unsigned long arg1, unsigned int arg2)
 {
-
+    unsigned int returncode;
+    if (sd_send_command(55, (card_info[current_card].rca)<<16, 1) == false)
+        return false;
+    sd_read_response(&returncode, 1);
+    if (sd_send_command(cmd, arg1, arg2) == false)
+        return false;
+    return true;
 }
 
-int flash_map_sector(int sector, int* chip, int* chip_sector)
+void sd_wait_for_state(tSDCardInfo* card, unsigned int state)
 {
-
+    unsigned int response = 0;
+    while(((response >> 9) & 0xf) != state)
+    {
+        sd_send_command(SEND_STATUS, (card->rca) << 16, 1);
+        sd_read_response(&response, 1);
+        /* TODO: Add a timeout and error handling */
+    }
+    SD_STATE_REG = state;
 }
 
-int flash_read_id(int no)
-{
 
-}
+static void copy_read_sectors(unsigned char* buf, int wordcount) 
+        NOINLINE_ATTR ICODE_ATTR;
 
-int flash_read_sector(int sector, unsigned char* buf,
-                      unsigned char* oob)
+static void copy_read_sectors(unsigned char* buf, int wordcount)
 {
-
+    unsigned int tmp = 0;
+
+    if ( (unsigned long)buf & 1)
+    {   /* not 16-bit aligned, copy byte by byte */
+        unsigned char* bufend = buf + wordcount*2;
+        do
+        {
+            tmp = DATA_REG;
+            *buf++ = tmp & 0xff;
+            *buf++ = tmp >> 8;
+        } while (buf < bufend); /* tail loop is faster */
+    }
+    else
+    {   /* 16-bit aligned, can do faster copy */
+        unsigned short* wbuf = (unsigned short*)buf;
+        unsigned short* wbufend = wbuf + wordcount;
+        do
+        {
+            *wbuf = DATA_REG;
+        } while (++wbuf < wbufend); /* tail loop is faster */
+    }
 }
 
-int flash_read_sector_oob(int sector, unsigned char* oob)
-{
-
-}
-
-static int flash_get_n_segments(void)
-{
-
-}
+static void copy_write_sectors(const unsigned char* buf, int wordcount)
+        NOINLINE_ATTR ICODE_ATTR;
 
-static int flash_get_n_phblocks(void)
+static void copy_write_sectors(const unsigned char* buf, int wordcount)
 {
-
+    if ( (unsigned long)buf & 1)
+    {   /* not 16-bit aligned, copy byte by byte */
+        unsigned short tmp = 0;
+        const unsigned char* bufend = buf + wordcount*2;
+        do
+        {
+            tmp = (unsigned short) *buf++;
+            tmp |= (unsigned short) *buf++ << 8;
+            DATA_REG = tmp;
+        } while (buf < bufend); /* tail loop is faster */
+    }
+    else
+    {   /* 16-bit aligned, can do faster copy */
+        unsigned short* wbuf = (unsigned short*)buf;
+        unsigned short* wbufend = wbuf + wordcount;
+        do
+        {
+            lcd_update();
+            DATA_REG = *wbuf;
+        } while (++wbuf < wbufend); /* tail loop is faster */
+    }
 }
 
-static int flash_get_n_sectors_in_block(void)
-{
-
-}
 
-static int flash_phblock_to_sector(int segment, int block)
+void sd_select_bank(unsigned char bank)
 {
-
+    unsigned int response;
+    unsigned char card_data[512];
+    unsigned char* write_buf;
+    int i;
+    tSDCardInfo *card = &card_info[0]; /* Bank selection will only be done on
+                                        the onboard flash */
+    if (current_bank != bank)
+    {
+        memset(card_data, 0, 512);
+        sd_wait_for_state(card, TRAN);
+        BLOCK_SIZE_REG = 512;
+        BLOCK_COUNT_REG = 1;
+        sd_send_command(35, 0, 0x1c0d); /* CMD35 is vendor specific */
+        sd_read_response(&response, 1);
+        SD_STATE_REG = PRG;
+
+        card_data[0] = bank;
+
+        /* Write the card data */
+        write_buf = card_data;
+        for (i = 0; i < BLOCK_SIZE / 2; i += FIFO_SIZE)
+        {
+            /* Wait for the FIFO to be empty */
+            while((STATUS_REG & FIFO_EMPTY) == 0) {} /* Erm... is this right? */
+
+            copy_write_sectors(write_buf, FIFO_SIZE);
+
+            write_buf += FIFO_SIZE*2; /* Advance one chunk of 16 words */
+        }
+
+        while((STATUS_REG & DATA_DONE) == 0) {}
+        current_bank = bank;
+    }
 }
 
-static int flash_is_bad_block(unsigned char* oob)
+void sd_init_device(void)
 {
-
+/* SD Protocol registers */
+    unsigned int dummy;
+    int i;
+
+    static unsigned int read_bl_len = 0;
+    static unsigned int c_size = 0;
+    static unsigned int c_size_mult = 0;
+    static unsigned long mult = 0;
+
+    unsigned char carddata[512];
+    unsigned char *dataptr;
+    tSDCardInfo *card = &card_info[0]; /* Init onboard flash only */
+
+/* Initialise card data as blank */
+    card->initialized = false;
+    card->ocr = 0;
+    card->csd[0] = 0;
+    card->csd[1] = 0;
+    card->csd[2] = 0;
+    card->cid[0] = 0;
+    card->cid[1] = 0;
+    card->cid[2] = 0;
+    card->rca = 0;
+
+    card->capacity = 0;
+    card->numblocks = 0;
+    card->block_size = 0;
+    card->block_exp = 0;
+
+/* Enable and initialise controller */
+    GPIOG_ENABLE |= (0x3 << 5);
+    GPIOG_OUTPUT_EN |= (0x3 << 5);
+    GPIOG_OUTPUT_VAL |= (0x3 << 5);
+    outl(inl(0x70000088) & ~(0x4), 0x70000088);
+    outl(inl(0x7000008c) & ~(0x4), 0x7000008c);
+    outl(inl(0x70000080) | 0x4, 0x70000080);
+    outl(inl(0x70000084) | 0x4, 0x70000084);
+    REG_1 = 6;
+    outl(inl(0x70000014) & ~(0x3ffff), 0x70000014);
+    outl((inl(0x70000014) & ~(0x3ffff)) | 0x255aa, 0x70000014);
+    outl(0x1010, 0x70000034);
+
+    GPIOA_ENABLE |= (1 << 7);
+    GPIOA_OUTPUT_EN &= ~(1 << 7);
+    GPIOD_ENABLE |= (0x1f);
+    GPIOD_OUTPUT_EN |= (0x1f);
+    GPIOD_OUTPUT_VAL |= (0x1f);
+    outl(inl(0x6000600c) | (1 << 14), 0x6000600c);
+    outl(inl(0x60006004) | (1 << 14), 0x60006004);
+    outl(inl(0x60006004) & ~(1 << 14), 0x60006004); /* Reset Controller? */
+    outl(0, 0x6000b000);
+    outl(0, 0x6000a000); /* Init DMA controller? */
+
+/* Init NAND */
+    REG_11 |= (1 << 15);
+    REG_12 |= (1 << 15);
+    REG_12 &= ~(3 << 12);
+    REG_12 |= (1 << 13);
+    REG_11 &= ~(3 << 12);
+    REG_11 |= (1 << 13);
+
+    SD_STATE_REG = TRAN;
+    REG_5 = 0xf;
+
+    sd_send_command(GO_IDLE_STATE, 0, 256);
+    while ((card->ocr & (1 << 31)) == 0) /* Loop until the card is powered up */
+    {
+        sd_send_acommand(SD_APP_OP_COND, 0x100000, 3);
+        sd_read_response(&(card->ocr), 3);
+
+        if (card->ocr == 0)
+        {
+            /* TODO: Handle failure */
+            while (1) {};
+        }
+    }
+
+    sd_send_command(ALL_SEND_CID, 0, 2);
+    sd_read_response(card->cid, 2);
+    sd_send_command(SEND_RELATIVE_ADDR, 0, 1);
+    sd_read_response(&card->rca, 1);
+    card->rca >>= 16; /* The Relative Card Address is the top 16 bits of the
+                        32 bits returned.  Whenever it is used, it gets
+                        shifted left by 16 bits, so this step could possibly
+                        be skipped. */
+
+    sd_send_command(SEND_CSD, card->rca << 16, 2);
+    sd_read_response(card->csd, 2);
+
+    /* Parse disk geometry */
+    /* These calculations come from the Sandisk SD card product manual */
+    read_bl_len = ((card->csd[2] >> 16) & 0xf);
+    c_size = ((card->csd[2] & (0x3ff)) << 2) +
+        ((card->csd[1] & (0xc0000000)) >> 30);
+    c_size_mult = ((card->csd[1] >> 15) & 0x7);
+    mult = (1<<(c_size_mult + 2));
+    card->max_read_bl_len = (1<<read_bl_len);
+    card->block_size = BLOCK_SIZE;     /* Always use 512 byte blocks */
+    card->numblocks = (c_size + 1) * mult * (card->max_read_bl_len / 512);
+    card->capacity = card->numblocks * card->block_size;
+
+    REG_1 = 0;
+    sd_send_command(SELECT_CARD, card->rca << 16, 129);
+    sd_read_response(&dummy, 1); /* I don't think we use the result from this */
+    sd_send_acommand(SET_BUS_WIDTH, (card->rca << 16) | 2, 1);
+    sd_read_response(&dummy, 1); /* 4 bit wide bus */
+    sd_send_command(SET_BLOCKLEN, card->block_size, 1);
+    sd_read_response(&dummy, 1);
+    BLOCK_SIZE_REG = card->block_size;
+
+    /* If this card is > 4Gb, then we need to enable bank switching */
+    if(card->numblocks > 0x7a77ff)
+    {
+        SD_STATE_REG = TRAN;
+        BLOCK_COUNT_REG = 1;
+        sd_send_command(SWITCH_FUNC, 0x80ffffef, 0x1c05);
+        sd_read_response(&dummy, 1);
+        /* Read 512 bytes from the card.
+        The first 512 bits contain the status information
+        TODO: Do something useful with this! */
+        dataptr = carddata;
+        for (i = 0; i < BLOCK_SIZE / 2; i += FIFO_SIZE)
+        {
+            /* Wait for the FIFO to be full */
+            while((STATUS_REG & FIFO_FULL) == 0) {}
+
+            copy_read_sectors(dataptr, FIFO_SIZE);
+
+            dataptr += (FIFO_SIZE*2); /* Advance one chunk of 16 words */
+        }
+    }
+    mutex_init(&ata_mtx);
 }
 
-int flash_disk_scan(void)
-{
-
-}
+/* API Functions */
 
-int flash_disk_find_block(int block)
+void ata_led(bool onoff)
 {
-
+    (void)onoff;
 }
 
-int flash_disk_read_sectors(unsigned long start,
-                            int count,
-                            void* buf)
+/* write the delayed sector to volume 0 */
+extern void ata_flush(void)
 {
 
 }
@@ -125,21 +480,161 @@ int ata_read_sectors(IF_MV2(int drive,)
                      int incount,
                      void* inbuf)
 {
-
+    int ret = 0;
+    long timeout;
+    int count;
+    void* buf;
+    long spinup_start;
+    unsigned int dummy;
+    unsigned int response;
+    unsigned int i;
+    tSDCardInfo *card = &card_info[current_card];
+
+    /* TODO: Add DMA support. */
+
+#ifdef HAVE_MULTIVOLUME
+    (void)drive; /* unused for now */
+#endif
+    mutex_lock(&ata_mtx);
+
+    last_disk_activity = current_tick;
+    spinup_start = current_tick;
+
+    ata_led(true);
+
+    timeout = current_tick + READ_TIMEOUT;
+
+    /* TODO: Select device */
+    if(current_card == 0)
+    {
+        if(start > 0x7a77ff)
+        {
+            sd_select_bank(1);
+            start-=0x7a77ff;
+        } else {
+            sd_select_bank(0);
+        }
+    }
+
+    buf = inbuf;
+    count = incount;
+    while (TIME_BEFORE(current_tick, timeout)) {
+        ret = 0;
+        last_disk_activity = current_tick;
+
+        SD_STATE_REG = TRAN;
+        BLOCK_COUNT_REG = count;
+        sd_send_command(READ_MULTIPLE_BLOCK, start * BLOCK_SIZE, 0x1c25);
+        sd_read_response(&dummy, 1);
+        /* TODO: Don't assume BLOCK_SIZE == SECTOR_SIZE */
+
+        for (i = 0; i < count * card->block_size / 2; i += FIFO_SIZE)
+        {
+            /* Wait for the FIFO to be full */
+            while((STATUS_REG & FIFO_FULL) == 0) {}
+
+            copy_read_sectors(buf, FIFO_SIZE);
+
+            buf += FIFO_SIZE*2; /* Advance one chunk of 16 words */
+
+            /* TODO: Switch bank if necessary */
+
+            last_disk_activity = current_tick;
+        }
+        udelay(75);
+        sd_send_command(STOP_TRANSMISSION, 0, 1);
+        sd_read_response(&dummy, 1);
+
+        response = 0;
+        sd_wait_for_state(card, TRAN);
+        break;
+    }
+    ata_led(false);
+
+    mutex_unlock(&ata_mtx);
+
+    /* only flush if reading went ok */
+    if ( (ret == 0) && delayed_write )
+        ata_flush();
+
+    return ret;
 }
 
+
 int ata_write_sectors(IF_MV2(int drive,)
                       unsigned long start,
                       int count,
                       const void* buf)
 {
-    (void)start;
-    (void)count;
-    (void)buf;
-    return -1;
+/* Write support is not finished yet */
+/* TODO: The standard suggests using ACMD23 prior to writing multiple blocks 
+   to improve performance */
+    unsigned int response;
+    void const* write_buf;
+    int ret = 0;
+    unsigned int i;
+    long timeout;
+    tSDCardInfo *card = &card_info[current_card];
+
+    mutex_lock(&ata_mtx);
+    ata_led(true);
+    if(current_card == 0)
+    {
+        if(start <= 0x7a77ff)
+        {
+            sd_select_bank(0);
+        } else {
+            sd_select_bank(1);
+            start -= 0x7a77ff;
+        }
+    }
+
+retry:
+    sd_wait_for_state(card, TRAN);
+    BLOCK_COUNT_REG = count;
+    sd_send_command(WRITE_MULTIPLE_BLOCK, start * SECTOR_SIZE, 0x1c2d);
+    sd_read_response(&response, 1);
+    write_buf = buf;
+    for (i = 0; i < count * card->block_size / 2; i += FIFO_SIZE)
+    {
+        if(i >= (count * card->block_size / 2)-FIFO_SIZE)
+        {
+            /* Set SD_STATE_REG to PRG for the last buffer fill */
+            SD_STATE_REG = PRG;
+        }
+
+        /* Wait for the FIFO to be empty */
+        while((STATUS_REG & FIFO_EMPTY) == 0) {}
+        /* Perhaps we could use bit 8 of card status (READY_FOR_DATA)? */
+
+        copy_write_sectors(write_buf, FIFO_SIZE);
+
+        write_buf += FIFO_SIZE*2; /* Advance one chunk of 16 words */
+        /* TODO: Switch bank if necessary */
+
+        last_disk_activity = current_tick;
+    }
+
+    timeout = current_tick + WRITE_TIMEOUT;
+
+    while((STATUS_REG & DATA_DONE) == 0) {
+        if(current_tick >= timeout)
+        {
+            sd_send_command(STOP_TRANSMISSION, 0, 1);
+            sd_read_response(&response, 1);
+            goto retry;
+        }
+    }
+    sd_send_command(STOP_TRANSMISSION, 0, 1);
+    sd_read_response(&response, 1);
+
+    sd_wait_for_state(card, TRAN);
+    mutex_unlock(&ata_mtx);
+    ata_led(false);
+    return ret;
 }
 
-/* schedule a single sector write, executed with the the next spinup 
+/* schedule a single sector write, executed with the the next spinup
    (volume 0 only, used for config sector) */
 extern void ata_delayed_write(unsigned long sector, const void* buf)
 {
@@ -147,12 +642,6 @@ extern void ata_delayed_write(unsigned long sector, const void* buf)
     (void)buf;
 }
 
-/* write the delayed sector to volume 0 */
-extern void ata_flush(void)
-{
-
-}
-
 void ata_spindown(int seconds)
 {
     (void)seconds;
@@ -189,10 +678,11 @@ void ata_enable(bool on)
 
 unsigned short* ata_get_identify(void)
 {
-
+    return identify_info;
 }
 
 int ata_init(void)
 {
+    sd_init_device();
     return 0;
 }
diff --git a/firmware/target/arm/sandisk/sansa-e200/ata-target.h b/firmware/target/arm/sandisk/sansa-e200/ata-target.h
index 67a01ed..dfdd3fe 100644
--- a/firmware/target/arm/sandisk/sansa-e200/ata-target.h
+++ b/firmware/target/arm/sandisk/sansa-e200/ata-target.h
@@ -1 +1,43 @@
-/* nothing here yet */
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2006 by Daniel Ankers
+ *
+ * All files in this archive are subject to the GNU General Public License.
+ * See the file COPYING in the source tree root for full license agreement.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+#ifndef ATA_TARGET_H
+#define ATA_TARGET_H
+
+#include "inttypes.h"
+
+typedef struct
+{
+    bool initialized;
+
+    unsigned int ocr;            /* OCR register */
+    unsigned int csd[4];         /* CSD register */
+    unsigned int cid[4];         /* CID register */
+    unsigned int rca;
+
+    uint64_t capacity;           /* size in bytes */
+    unsigned long numblocks;     /* size in flash blocks */
+    unsigned int block_size;     /* block size in bytes */
+    unsigned int max_read_bl_len;/* max read data block length */
+    unsigned int block_exp;      /* block size exponent */
+} tSDCardInfo;
+
+tSDCardInfo *sd_card_info(int card_no);
+bool sd_touched(void);
+
+#endif