/*************************************************************************** * __________ __ ___. * Open \______ \ ____ ____ | | _\_ |__ _______ ___ * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ * \/ \/ \/ \/ \/ * $Id$ * * Copyright (C) 2004 by Jens Arnold * * 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. * ****************************************************************************/ #include #include "ata.h" #include "ata_mmc.h" #include "ata_idle_notify.h" #include "kernel.h" #include "thread.h" #include "led.h" #include "sh7034.h" #include "system.h" #include "debug.h" #include "panic.h" #include "usb.h" #include "power.h" #include "string.h" #include "hwcompat.h" #include "adc.h" #include "bitswap.h" #include "disk.h" /* for mount/unmount */ #define SECTOR_SIZE 512 #define MAX_BLOCK_SIZE 2048 /* Command definitions */ #define CMD_GO_IDLE_STATE 0x40 /* R1 */ #define CMD_SEND_OP_COND 0x41 /* R1 */ #define CMD_SEND_CSD 0x49 /* R1 */ #define CMD_SEND_CID 0x4a /* R1 */ #define CMD_STOP_TRANSMISSION 0x4c /* R1 */ #define CMD_SEND_STATUS 0x4d /* R2 */ #define CMD_SET_BLOCKLEN 0x50 /* R1 */ #define CMD_READ_SINGLE_BLOCK 0x51 /* R1 */ #define CMD_READ_MULTIPLE_BLOCK 0x52 /* R1 */ #define CMD_WRITE_BLOCK 0x58 /* R1b */ #define CMD_WRITE_MULTIPLE_BLOCK 0x59 /* R1b */ #define CMD_READ_OCR 0x7a /* R3 */ /* Response formats: R1 = single byte, msb=0, various error flags R1b = R1 + busy token(s) R2 = 2 bytes (1st byte identical to R1), additional flags R3 = 5 bytes (R1 + OCR register) */ #define R1_PARAMETER_ERR 0x40 #define R1_ADDRESS_ERR 0x20 #define R1_ERASE_SEQ_ERR 0x10 #define R1_COM_CRC_ERR 0x08 #define R1_ILLEGAL_CMD 0x04 #define R1_ERASE_RESET 0x02 #define R1_IN_IDLE_STATE 0x01 #define R2_OUT_OF_RANGE 0x80 #define R2_ERASE_PARAM 0x40 #define R2_WP_VIOLATION 0x20 #define R2_CARD_ECC_FAIL 0x10 #define R2_CC_ERROR 0x08 #define R2_ERROR 0x04 #define R2_ERASE_SKIP 0x02 #define R2_CARD_LOCKED 0x01 /* Data start tokens */ #define DT_START_BLOCK 0xfe #define DT_START_WRITE_MULTIPLE 0xfc #define DT_STOP_TRAN 0xfd /* for compatibility */ int ata_spinup_time = 0; long last_disk_activity = -1; /* private variables */ static struct mutex mmc_mutex; #ifdef HAVE_HOTSWAP static bool mmc_monitor_enabled = true; static long mmc_stack[(DEFAULT_STACK_SIZE + 0x800)/sizeof(long)]; #else static long mmc_stack[DEFAULT_STACK_SIZE/sizeof(long)]; #endif static const char mmc_thread_name[] = "mmc"; static struct event_queue mmc_queue; static bool initialized = false; static bool new_mmc_circuit; static enum { MMC_UNKNOWN, MMC_UNTOUCHED, MMC_TOUCHED } mmc_status = MMC_UNKNOWN; static enum { SER_POLL_WRITE, SER_POLL_READ, SER_DISABLED } serial_mode; static const unsigned char dummy[] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF }; struct block_cache_entry { bool inuse; #ifdef HAVE_MULTIVOLUME int drive; #endif unsigned long blocknum; unsigned char data[MAX_BLOCK_SIZE+4]; /* include start token, dummy crc, and an extra byte at the start * to keep the data word aligned. */ }; /* 2 buffers used alternatively for writing, and also for reading * and sub-block writing if block size > sector size */ #define NUMCACHES 2 static struct block_cache_entry block_cache[NUMCACHES]; static int current_cache = 0; /* globals for background copy and swap */ static const unsigned char *bcs_src = NULL; static unsigned char *bcs_dest = NULL; static unsigned long bcs_len = 0; static tCardInfo card_info[2]; #ifndef HAVE_MULTIVOLUME static int current_card = 0; #endif static bool last_mmc_status = false; static int countdown; /* for mmc switch debouncing */ static bool usb_activity; /* monitoring the USB bridge */ static long last_usb_activity; /* private function declarations */ static int select_card(int card_no); static void deselect_card(void); static void setup_sci1(int bitrate_register); static void set_sci1_poll_read(void); static void write_transfer(const unsigned char *buf, int len) __attribute__ ((section(".icode"))); static void read_transfer(unsigned char *buf, int len) __attribute__ ((section(".icode"))); static unsigned char poll_byte(long timeout); static unsigned char poll_busy(long timeout); static int send_cmd(int cmd, unsigned long parameter, unsigned char *response); static int receive_cxd(unsigned char *buf); static int initialize_card(int card_no); static void bg_copy_swap(void); static int receive_block(unsigned char *inbuf, int size, long timeout); static int send_block(int size, unsigned char start_token, long timeout); static int cache_block(IF_MV2(int drive,) unsigned long blocknum, int size, long timeout); static void mmc_tick(void); /* implementation */ void mmc_enable_int_flash_clock(bool on) { /* Internal flash clock is enabled by setting PA12 high with the new * clock circuit, and by setting it low with the old clock circuit */ if (on ^ new_mmc_circuit) and_b(~0x10, &PADRH); /* clear clock gate PA12 */ else or_b(0x10, &PADRH); /* set clock gate PA12 */ } static int select_card(int card_no) { mutex_lock(&mmc_mutex); led(true); last_disk_activity = current_tick; if (!card_info[card_no].initialized) { setup_sci1(7); /* Initial rate: 375 kbps (need <= 400 per mmc specs) */ write_transfer(dummy, 10); /* allow the card to synchronize */ while (!(SSR1 & SCI_TEND)); } if (card_no == 0) /* internal */ and_b(~0x04, &PADRH); /* assert CS */ else /* external */ and_b(~0x02, &PADRH); /* assert CS */ if (card_info[card_no].initialized) { setup_sci1(card_info[card_no].bitrate_register); return 0; } else { return initialize_card(card_no); } } static void deselect_card(void) { while (!(SSR1 & SCI_TEND)); /* wait for end of transfer */ or_b(0x06, &PADRH); /* deassert CS (both cards) */ led(false); mutex_unlock(&mmc_mutex); last_disk_activity = current_tick; } static void setup_sci1(int bitrate_register) { while (!(SSR1 & SCI_TEND)); /* wait for end of transfer */ SCR1 = 0; /* disable serial port */ SMR1 = SYNC_MODE; /* no prescale */ BRR1 = bitrate_register; SSR1 = 0; SCR1 = SCI_TE; /* enable transmitter */ serial_mode = SER_POLL_WRITE; } static void set_sci1_poll_read(void) { while (!(SSR1 & SCI_TEND)); /* wait for end of transfer */ SCR1 = 0; /* disable transmitter (& receiver) */ SCR1 = (SCI_TE|SCI_RE); /* re-enable transmitter & receiver */ while (!(SSR1 & SCI_TEND)); /* wait for SCI init completion (!) */ serial_mode = SER_POLL_READ; TDR1 = 0xFF; /* send do-nothing while reading */ } static void write_transfer(const unsigned char *buf, int len) { const unsigned char *buf_end = buf + len; register unsigned char data; if (serial_mode != SER_POLL_WRITE) { while (!(SSR1 & SCI_TEND)); /* wait for end of transfer */ SCR1 = 0; /* disable transmitter & receiver */ SSR1 = 0; /* clear all flags */ SCR1 = SCI_TE; /* enable transmitter only */ serial_mode = SER_POLL_WRITE; } while (buf < buf_end) { data = fliptable[(signed char)(*buf++)]; /* bitswap */ while (!(SSR1 & SCI_TDRE)); /* wait for end of transfer */ TDR1 = data; /* write byte */ SSR1 = 0; /* start transmitting */ } } /* don't call this with len == 0 */ static void read_transfer(unsigned char *buf, int len) { unsigned char *buf_end = buf + len - 1; register signed char data; if (serial_mode != SER_POLL_READ) set_sci1_poll_read(); SSR1 = 0; /* start receiving first byte */ while (buf < buf_end) { while (!(SSR1 & SCI_RDRF)); /* wait for data */ data = RDR1; /* read byte */ SSR1 = 0; /* start receiving */ *buf++ = fliptable[data]; /* bitswap */ } while (!(SSR1 & SCI_RDRF)); /* wait for last byte */ *buf = fliptable[(signed char)(RDR1)]; /* read & bitswap */ } /* returns 0xFF on timeout, timeout is in bytes */ static unsigned char poll_byte(long timeout) { long i; unsigned char data = 0; /* stop the compiler complaining */ if (serial_mode != SER_POLL_READ) set_sci1_poll_read(); i = 0; do { SSR1 = 0; /* start receiving */ while (!(SSR1 & SCI_RDRF)); /* wait for data */ data = RDR1; /* read byte */ } while ((data == 0xFF) && (++i < timeout)); return fliptable[(signed char)data]; } /* returns 0 on timeout, timeout is in bytes */ static unsigned char poll_busy(long timeout) { long i; unsigned char data, dummy; if (serial_mode != SER_POLL_READ) set_sci1_poll_read(); /* get data response */ SSR1 = 0; /* start receiving */ while (!(SSR1 & SCI_RDRF)); /* wait for data */ data = fliptable[(signed char)(RDR1)]; /* read byte */ /* wait until the card is ready again */ i = 0; do { SSR1 = 0; /* start receiving */ while (!(SSR1 & SCI_RDRF)); /* wait for data */ dummy = RDR1; /* read byte */ } while ((dummy != 0xFF) && (++i < timeout)); return (dummy == 0xFF) ? data : 0; } /* Send MMC command and get response */ static int send_cmd(int cmd, unsigned long parameter, unsigned char *response) { unsigned char command[] = {0x40, 0x00, 0x00, 0x00, 0x00, 0x95, 0xFF}; command[0] = cmd; if (parameter != 0) { command[1] = (parameter >> 24) & 0xFF; command[2] = (parameter >> 16) & 0xFF; command[3] = (parameter >> 8) & 0xFF; command[4] = parameter & 0xFF; } write_transfer(command, 7); response[0] = poll_byte(20); if (response[0] != 0x00) { write_transfer(dummy, 1); return -1; } switch (cmd) { case CMD_SEND_CSD: /* R1 response, leave open */ case CMD_SEND_CID: case CMD_READ_SINGLE_BLOCK: case CMD_READ_MULTIPLE_BLOCK: break; case CMD_SEND_STATUS: /* R2 response, close with dummy */ read_transfer(response + 1, 1); write_transfer(dummy, 1); break; case CMD_READ_OCR: /* R3 response, close with dummy */ read_transfer(response + 1, 4); write_transfer(dummy, 1); break; default: /* R1 response, close with dummy */ write_transfer(dummy, 1); break; /* also catches block writes */ } return 0; } /* Receive CID/ CSD data (16 bytes) */ static int receive_cxd(unsigned char *buf) { if (poll_byte(20) != DT_START_BLOCK) { write_transfer(dummy, 1); return -1; /* not start of data */ } read_transfer(buf, 16); write_transfer(dummy, 3); /* 2 bytes dontcare crc + 1 byte trailer */ return 0; } /* helper function to extract n (<=32) bits from an arbitrary position. counting from MSB to LSB */ unsigned long mmc_extract_bits( const unsigned long *p, /* the start of the bitfield array */ unsigned int start, /* bit no. to start reading */ unsigned int size) /* how many bits to read */ { unsigned int long_index = start / 32; unsigned int bit_index = start % 32; unsigned long result; result = p[long_index] << bit_index; if (bit_index + size > 32) /* crossing longword boundary */ result |= p[long_index+1] >> (32 - bit_index); result >>= 32 - size; return result; } static int initialize_card(int card_no) { int rc, i, temp; unsigned char response[5]; tCardInfo *card = &card_info[card_no]; static const char mantissa[] = { /* *10 */ 0, 10, 12, 13, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 70, 80 }; static const int exponent[] = { /* use varies */ 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000, 100000000, 1000000000 }; if (card_no == 1) mmc_status = MMC_TOUCHED; /* switch to SPI mode */ send_cmd(CMD_GO_IDLE_STATE, 0, response); if (response[0] != 0x01) return -1; /* error response */ /* initialize card */ for (i = 0; i < 100; i++) /* timeout 1 sec */ { sleep(1); if (send_cmd(CMD_SEND_OP_COND, 0, response) == 0) break; } if (response[0] != 0x00) return -2; /* not ready */ /* get OCR register */ rc = send_cmd(CMD_READ_OCR, 0, response); if (rc) return rc * 10 - 3; card->ocr = (response[1] << 24) | (response[2] << 16) | (response[3] << 8) | response[4]; /* check voltage */ if (!(card->ocr & 0x00100000)) /* 3.2 .. 3.3 V */ return -4; /* get CSD register */ rc = send_cmd(CMD_SEND_CSD, 0, response); if (rc) return rc * 10 - 5; rc = receive_cxd((unsigned char*)card->csd); if (rc) return rc * 10 - 6; /* check block sizes */ card->block_exp = mmc_extract_bits(card->csd, 44, 4); card->blocksize = 1 << card->block_exp; if ((mmc_extract_bits(card->csd, 102, 4) != card->block_exp) || card->blocksize > MAX_BLOCK_SIZE) { return -7; } if (card->blocksize != SECTOR_SIZE) { rc = send_cmd(CMD_SET_BLOCKLEN, card->blocksize, response); if (rc) return rc * 10 - 8; } /* max transmission speed, clock divider */ temp = mmc_extract_bits(card->csd, 29, 3); temp = (temp > 3) ? 3 : temp; card->speed = mantissa[mmc_extract_bits(card->csd, 25, 4)] * exponent[temp + 4]; card->bitrate_register = (FREQ/4-1) / card->speed; /* NSAC, TSAC, read timeout */ card->nsac = 100 * mmc_extract_bits(card->csd, 16, 8); card->tsac = mantissa[mmc_extract_bits(card->csd, 9, 4)]; temp = mmc_extract_bits(card->csd, 13, 3); card->read_timeout = ((FREQ/4) / (card->bitrate_register + 1) * card->tsac / exponent[9 - temp] + (10 * card->nsac)); card->read_timeout /= 8; /* clocks -> bytes */ card->tsac = card->tsac * exponent[temp] / 10; /* r2w_factor, write timeout */ card->r2w_factor = 1 << mmc_extract_bits(card->csd, 99, 3); if (card->r2w_factor > 32) /* dirty MMC spec violation */ { card->read_timeout *= 4; /* add safety factor */ card->write_timeout = card->read_timeout * 8; } else card->write_timeout = card->read_timeout * card->r2w_factor; /* card size */ card->numblocks = (mmc_extract_bits(card->csd, 54, 12) + 1) * (1 << (mmc_extract_bits(card->csd, 78, 3) + 2)); card->size = card->numblocks * card->blocksize; /* switch to full speed */ setup_sci1(card->bitrate_register); /* get CID register */ rc = send_cmd(CMD_SEND_CID, 0, response); if (rc) return rc * 10 - 9; rc = receive_cxd((unsigned char*)card->cid); if (rc) return rc * 10 - 9; card->initialized = true; return 0; } tCardInfo *mmc_card_info(int card_no) { tCardInfo *card = &card_info[card_no]; if (!card->initialized && ((card_no == 0) || mmc_detect())) { select_card(card_no); deselect_card(); } return card; } /* copy and swap in the background. If destination is NULL, use the next * block cache entry */ static void bg_copy_swap(void) { if (!bcs_len) return; if (!bcs_dest) { current_cache = (current_cache + 1) % NUMCACHES; /* next cache */ block_cache[current_cache].inuse = false; bcs_dest = block_cache[current_cache].data + 2; } if (bcs_src) { memcpy(bcs_dest, bcs_src, bcs_len); bcs_src += bcs_len; } bitswap(bcs_dest, bcs_len); bcs_dest += bcs_len; bcs_len = 0; } /* Receive one block with dma, possibly swapping the previously received * block in the background */ static int receive_block(unsigned char *inbuf, int size, long timeout) { if (poll_byte(timeout) != DT_START_BLOCK) { write_transfer(dummy, 1); return -1; /* not start of data */ } while (!(SSR1 & SCI_TEND)); /* wait for end of transfer */ SCR1 = 0; /* disable serial */ SSR1 = 0; /* clear all flags */ /* setup DMA channel 0 */ CHCR0 = 0; /* disable */ SAR0 = RDR1_ADDR; DAR0 = (unsigned long) inbuf; DTCR0 = size; CHCR0 = 0x4601; /* fixed source address, RXI1, enable */ DMAOR = 0x0001; SCR1 = (SCI_RE|SCI_RIE); /* kick off DMA */ /* dma receives 2 bytes more than DTCR2, but the last 2 bytes are not * stored. The first extra byte is available from RDR1 after the DMA ends, * the second one is lost because of the SCI overrun. However, this * behaviour conveniently discards the crc. */ bg_copy_swap(); yield(); /* be nice */ while (!(CHCR0 & 0x0002)); /* wait for end of DMA */ while (!(SSR1 & SCI_ORER)); /* wait for the trailing bytes */ SCR1 = 0; serial_mode = SER_DISABLED; write_transfer(dummy, 1); /* send trailer */ last_disk_activity = current_tick; return 0; } /* Send one block with dma from the current block cache, possibly preparing * the next block within the next block cache in the background. */ static int send_block(int size, unsigned char start_token, long timeout) { int rc = 0; unsigned char *curbuf = block_cache[current_cache].data; curbuf[1] = fliptable[(signed char)start_token]; *(unsigned short *)(curbuf + size + 2) = 0xFFFF; while (!(SSR1 & SCI_TEND)); /* wait for end of transfer */ SCR1 = 0; /* disable serial */ SSR1 = 0; /* clear all flags */ /* setup DMA channel 0 */ CHCR0 = 0; /* disable */ SAR0 = (unsigned long)(curbuf + 1); DAR0 = TDR1_ADDR; DTCR0 = size + 3; /* start token + block + dummy crc */ CHCR0 = 0x1701; /* fixed dest. address, TXI1, enable */ DMAOR = 0x0001; SCR1 = (SCI_TE|SCI_TIE); /* kick off DMA */ bg_copy_swap(); yield(); /* be nice */ while (!(CHCR0 & 0x0002)); /* wait for end of DMA */ while (!(SSR1 & SCI_TEND)); /* wait for end of transfer */ SCR1 = 0; serial_mode = SER_DISABLED; if ((poll_busy(timeout) & 0x1F) != 0x05) /* something went wrong */ rc = -1; write_transfer(dummy, 1); last_disk_activity = current_tick; return rc; } static int cache_block(IF_MV2(int drive,) unsigned long blocknum, int size, long timeout) { int rc, i; unsigned char response; /* check whether the block is already cached */ for (i = 0; i < NUMCACHES; i++) { if (block_cache[i].inuse && (block_cache[i].blocknum == blocknum) #ifdef HAVE_MULTIVOLUME && (block_cache[i].drive == drive) #endif ) { current_cache = i; bg_copy_swap(); return 0; } } /* not found: read the block */ current_cache = (current_cache + 1) % NUMCACHES; rc = send_cmd(CMD_READ_SINGLE_BLOCK, blocknum * size, &response); if (rc) return rc * 10 - 1; block_cache[current_cache].inuse = false; rc = receive_block(block_cache[current_cache].data + 2, size, timeout); if (rc) return rc * 10 - 2; #ifdef HAVE_MULTIVOLUME block_cache[current_cache].drive = drive; #endif block_cache[current_cache].blocknum = blocknum; block_cache[current_cache].inuse = true; return 0; } int ata_read_sectors(IF_MV2(int drive,) unsigned long start, int incount, void* inbuf) { int rc = 0; unsigned int blocksize, offset; unsigned long c_addr, c_end_addr; unsigned long c_block, c_end_block; unsigned char response; tCardInfo *card; #ifndef HAVE_MULTIVOLUME int drive = current_card; #endif c_addr = start * SECTOR_SIZE; c_end_addr = c_addr + incount * SECTOR_SIZE; card = &card_info[drive]; rc = select_card(drive); if (rc) { rc = rc * 10 - 1; goto error; } if (c_end_addr > card->size) { rc = -2; goto error; } blocksize = card->blocksize; offset = c_addr & (blocksize - 1); c_block = c_addr >> card->block_exp; c_end_block = c_end_addr >> card->block_exp; bcs_dest = inbuf; if (offset) /* first partial block */ { unsigned long len = MIN(c_end_addr - c_addr, blocksize - offset); rc = cache_block(IF_MV2(drive,) c_block, blocksize, card->read_timeout); if (rc) { rc = rc * 10 - 3; goto error; } bcs_src = block_cache[current_cache].data + 2 + offset; bcs_len = len; inbuf += len; c_addr += len; c_block++; } /* some cards don't like reading the very last block with * CMD_READ_MULTIPLE_BLOCK, so make sure this block is always * read with CMD_READ_SINGLE_BLOCK. Let the 'last partial block' * read catch this. */ if (c_end_block == card->numblocks) c_end_block--; if (c_block < c_end_block) { int read_cmd = (c_end_block - c_block > 1) ? CMD_READ_MULTIPLE_BLOCK : CMD_READ_SINGLE_BLOCK; rc = send_cmd(read_cmd, c_addr, &response); if (rc) { rc = rc * 10 - 4; goto error; } while (c_block < c_end_block) { rc = receive_block(inbuf, blocksize, card->read_timeout); if (rc) { rc = rc * 10 - 5; goto error; } bcs_src = NULL; bcs_len = blocksize; inbuf += blocksize; c_addr += blocksize; c_block++; } if (read_cmd == CMD_READ_MULTIPLE_BLOCK) { rc = send_cmd(CMD_STOP_TRANSMISSION, 0, &response); if (rc) { rc = rc * 10 - 6; goto error; } } } if (c_addr < c_end_addr) /* last partial block */ { rc = cache_block(IF_MV2(drive,) c_block, blocksize, card->read_timeout); if (rc) { rc = rc * 10 - 7; goto error; } bcs_src = block_cache[current_cache].data + 2; bcs_len = c_end_addr - c_addr; } bg_copy_swap(); error: deselect_card(); return rc; } int ata_write_sectors(IF_MV2(int drive,) unsigned long start, int count, const void* buf) { int rc = 0; unsigned int blocksize, offset; unsigned long c_addr, c_end_addr; unsigned long c_block, c_end_block; unsigned char response; tCardInfo *card; #ifndef HAVE_MULTIVOLUME int drive = current_card; #endif if (start == 0) panicf("Writing on sector 0\n"); c_addr = start * SECTOR_SIZE; c_end_addr = c_addr + count * SECTOR_SIZE; card = &card_info[drive]; rc = select_card(drive); if (rc) { rc = rc * 10 - 1; goto error; } if (c_end_addr > card->size) panicf("Writing past end of card\n"); blocksize = card->blocksize; offset = c_addr & (blocksize - 1); c_block = c_addr >> card->block_exp; c_end_block = c_end_addr >> card->block_exp; bcs_src = buf; /* Special case: first block is trimmed at both ends. May only happen * if (blocksize > 2 * sectorsize), i.e. blocksize == 2048 */ if ((c_block == c_end_block) && offset) c_end_block++; if (c_block < c_end_block) { int write_cmd; unsigned char start_token; if (c_end_block - c_block > 1) { write_cmd = CMD_WRITE_MULTIPLE_BLOCK; start_token = DT_START_WRITE_MULTIPLE; } else { write_cmd = CMD_WRITE_BLOCK; start_token = DT_START_BLOCK; } if (offset) { unsigned long len = MIN(c_end_addr - c_addr, blocksize - offset); rc = cache_block(IF_MV2(drive,) c_block, blocksize, card->read_timeout); if (rc) { rc = rc * 10 - 2; goto error; } bcs_dest = block_cache[current_cache].data + 2 + offset; bcs_len = len; c_addr -= offset; } else { bcs_dest = NULL; /* next block cache */ bcs_len = blocksize; } bg_copy_swap(); rc = send_cmd(write_cmd, c_addr, &response); if (rc) { rc = rc * 10 - 3; goto error; } c_block++; /* early increment to simplify the loop */ while (c_block < c_end_block) { bcs_dest = NULL; /* next block cache */ bcs_len = blocksize; rc = send_block(blocksize, start_token, card->write_timeout); if (rc) { rc = rc * 10 - 4; goto error; } c_addr += blocksize; c_block++; } rc = send_block(blocksize, start_token, card->write_timeout); if (rc) { rc = rc * 10 - 5; goto error; } c_addr += blocksize; /* c_block++ was done early */ if (write_cmd == CMD_WRITE_MULTIPLE_BLOCK) { response = DT_STOP_TRAN; write_transfer(&response, 1); poll_busy(card->write_timeout); } } if (c_addr < c_end_addr) /* last partial block */ { rc = cache_block(IF_MV2(drive,) c_block, blocksize, card->read_timeout); if (rc) { rc = rc * 10 - 6; goto error; } bcs_dest = block_cache[current_cache].data + 2; bcs_len = c_end_addr - c_addr; bg_copy_swap(); rc = send_cmd(CMD_WRITE_BLOCK, c_addr, &response); if (rc) { rc = rc * 10 - 7; goto error; } rc = send_block(blocksize, DT_START_BLOCK, card->write_timeout); if (rc) { rc = rc * 10 - 8; goto error; } } error: deselect_card(); return rc; } void ata_spindown(int seconds) { (void)seconds; } bool ata_disk_is_active(void) { /* this is correct unless early return from write gets implemented */ return mmc_mutex.locked; } void ata_sleep(void) { } void ata_spin(void) { } static void mmc_thread(void) { struct event ev; bool idle_notified = false; while (1) { queue_wait_w_tmo(&mmc_queue, &ev, HZ); switch ( ev.id ) { case SYS_USB_CONNECTED: usb_acknowledge(SYS_USB_CONNECTED_ACK); /* Wait until the USB cable is extracted again */ usb_wait_for_disconnect(&mmc_queue); break; #ifdef HAVE_HOTSWAP case SYS_MMC_INSERTED: disk_mount(1); /* mount MMC */ queue_broadcast(SYS_FS_CHANGED, 0); break; case SYS_MMC_EXTRACTED: disk_unmount(1); /* release "by force" */ queue_broadcast(SYS_FS_CHANGED, 0); break; #endif default: if (TIME_BEFORE(current_tick, last_disk_activity+(3*HZ))) { idle_notified = false; } else { if (!idle_notified) { call_ata_idle_notifys(false); idle_notified = true; } } break; } } } #ifdef HAVE_HOTSWAP void mmc_enable_monitoring(bool on) { mmc_monitor_enabled = on; } #endif bool mmc_detect(void) { return adc_read(ADC_MMC_SWITCH) < 0x200 ? true : false; } bool mmc_touched(void) { if (mmc_status == MMC_UNKNOWN) /* try to detect */ { unsigned char response; mutex_lock(&mmc_mutex); setup_sci1(7); /* safe value */ and_b(~0x02, &PADRH); /* assert CS */ send_cmd(CMD_SEND_OP_COND, 0, &response); if (response == 0xFF) mmc_status = MMC_UNTOUCHED; else mmc_status = MMC_TOUCHED; deselect_card(); } return mmc_status == MMC_TOUCHED; } bool mmc_usb_active(int delayticks) { /* reading "inactive" is delayed by user-supplied monoflop value */ return (usb_activity || TIME_BEFORE(current_tick, last_usb_activity + delayticks)); } static void mmc_tick(void) { bool current_status; #ifndef HAVE_HOTSWAP const bool mmc_monitor_enabled = true; #endif if (new_mmc_circuit) /* USB bridge activity is 0 on idle, ~527 on active */ current_status = adc_read(ADC_USB_ACTIVE) > 0x100; else current_status = adc_read(ADC_USB_ACTIVE) < 0x190; if (!current_status && usb_activity) last_usb_activity = current_tick; usb_activity = current_status; if (mmc_monitor_enabled) { current_status = mmc_detect(); /* Only report when the status has changed */ if (current_status != last_mmc_status) { last_mmc_status = current_status; countdown = 30; } else { /* Count down until it gets negative */ if (countdown >= 0) countdown--; if (countdown == 0) { if (current_status) { queue_broadcast(SYS_MMC_INSERTED, 0); } else { queue_broadcast(SYS_MMC_EXTRACTED, 0); mmc_status = MMC_UNTOUCHED; card_info[1].initialized = false; } } } } } int ata_soft_reset(void) { return 0; } void ata_enable(bool on) { PBCR1 &= ~0x0CF0; /* PB13, PB11 and PB10 become GPIOs, if not modified below */ PACR2 &= ~0x4000; /* use PA7 (bridge reset) as GPIO */ if (on) { PBCR1 |= 0x08A0; /* as SCK1, TxD1, RxD1 */ IPRE &= 0x0FFF; /* disable SCI1 interrupts for the CPU */ mmc_enable_int_flash_clock(true); /* always enabled in SPI mode */ } and_b(~0x80, &PADRL); /* assert reset */ sleep(HZ/20); or_b(0x80, &PADRL); /* de-assert reset */ sleep(HZ/20); card_info[0].initialized = false; card_info[1].initialized = false; } int ata_init(void) { int rc = 0; mutex_init(&mmc_mutex); led(false); /* Port setup */ PACR1 &= ~0x0F00; /* GPIO function for PA12, /IRQ1 for PA13 */ PACR1 |= 0x0400; PADR |= 0x0680; /* set all the selects + reset high (=inactive) */ PAIOR |= 0x1680; /* make outputs for them and the PA12 clock gate */ PBDR |= 0x2C00; /* SCK1, TxD1 and RxD1 high when GPIO CHECKME: mask */ PBIOR |= 0x2000; /* SCK1 output */ PBIOR &= ~0x0C00; /* TxD1, RxD1 input */ last_mmc_status = mmc_detect(); #ifndef HAVE_MULTIVOLUME if (last_mmc_status) { /* MMC inserted */ current_card = 1; } else { /* no MMC, use internal memory */ current_card = 0; } #endif new_mmc_circuit = ((read_hw_mask() & MMC_CLOCK_POLARITY) != 0); ata_enable(true); if ( !initialized ) { if (!last_mmc_status) mmc_status = MMC_UNTOUCHED; queue_init(&mmc_queue, true); create_thread(mmc_thread, mmc_stack, sizeof(mmc_stack), mmc_thread_name IF_PRIO(, PRIORITY_SYSTEM)); tick_add_task(mmc_tick); initialized = true; } return rc; }