| /*************************************************************************** |
| * __________ __ ___. |
| * 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 <stdbool.h> |
| #include "ata.h" |
| #include "ata_mmc.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" |
| |
| #define SECTOR_SIZE 512 |
| |
| /* 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_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 */ |
| bool old_recorder = false; /* FIXME: get rid of this cross-dependency */ |
| int ata_spinup_time = 0; |
| char ata_device = 0; /* device 0 (master) or 1 (slave) */ |
| int ata_io_address = 0; /* 0x300 or 0x200, only valid on recorder */ |
| long last_disk_activity = -1; |
| |
| /* private variables */ |
| |
| static struct mutex mmc_mutex; |
| |
| static bool initialized = false; |
| static bool delayed_write = false; |
| static unsigned char delayed_sector[SECTOR_SIZE]; |
| static int delayed_sector_num; |
| |
| 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 |
| }; |
| |
| /* 2 buffers for writing, include start token and dummy crc and an extra |
| * byte to keep word alignment */ |
| static unsigned char sector_buffer[2][(SECTOR_SIZE+4)]; |
| static int current_buffer = 0; |
| |
| static tCardInfo card_info[2]; |
| static int current_card = 0; |
| static bool last_mmc_status = false; |
| static int countdown; /* for mmc switch debouncing */ |
| |
| /* 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(int timeout); |
| static unsigned char poll_busy(int 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 int receive_sector(unsigned char *inbuf, unsigned char *swapbuf, |
| int timeout); |
| static void swapcopy_sector(const unsigned char *buf); |
| static int send_sector(const unsigned char *nextbuf, int timeout); |
| static int send_single_sector(const unsigned char *buf, int timeout); |
| |
| static void mmc_tick(void); |
| |
| /* implementation */ |
| |
| void mmc_select_clock(int card_no) |
| { |
| if (card_no == 0) /* internal */ |
| or_b(0x10, &PADRH); /* set clock gate PA12 CHECKME: mask? */ |
| else /* external */ |
| and_b(~0x10, &PADRH); /* clear clock gate PA12 CHECKME: mask?*/ |
| } |
| |
| static int select_card(int card_no) |
| { |
| mmc_select_clock(card_no); |
| 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) */ |
| |
| 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(int timeout) |
| { |
| int 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(int timeout) |
| { |
| int 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 bit_index; |
| unsigned int bits_to_use; |
| unsigned long mask; |
| unsigned long result; |
| |
| if (size == 1) |
| { /* short cut */ |
| return ((p[start/32] >> (31 - (start % 32))) & 1); |
| } |
| |
| result = 0; |
| while (size) |
| { |
| bit_index = start % 32; |
| bits_to_use = MIN(32 - bit_index, size); |
| mask = 0xFFFFFFFF >> (32 - bits_to_use); |
| |
| result <<= bits_to_use; /* start last round */ |
| result |= (p[start/32] >> (32 - bits_to_use - bit_index)) & mask; |
| |
| start += bits_to_use; |
| size -= bits_to_use; |
| } |
| |
| return result; |
| } |
| |
| static int initialize_card(int card_no) |
| { |
| int 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 |
| }; |
| |
| /* switch to SPI mode */ |
| send_cmd(CMD_GO_IDLE_STATE, 0, response); |
| if (response[0] != 0x01) |
| return -1; /* error response */ |
| |
| /* initialize card */ |
| i = 0; |
| while (send_cmd(CMD_SEND_OP_COND, 0, response) && (++i < 200)); |
| if (response[0] != 0x00) |
| return -2; /* not ready */ |
| |
| /* get OCR register */ |
| if (send_cmd(CMD_READ_OCR, 0, response)) |
| return -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 */ |
| if (send_cmd(CMD_SEND_CSD, 0, response)) |
| return -5; |
| if (receive_cxd((unsigned char*)card->csd)) |
| return -6; |
| |
| /* check block size */ |
| if ((1 << mmc_extract_bits(card->csd, 44, 4)) != SECTOR_SIZE) |
| return -7; |
| |
| /* 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 *= exponent[temp]; |
| |
| /* r2w_factor, write timeout */ |
| temp = mmc_extract_bits(card->csd, 99, 3); |
| temp = (temp > 5) ? 5 : temp; |
| card->r2w_factor = 1 << temp; |
| card->write_timeout = card->read_timeout * card->r2w_factor; |
| |
| /* switch to full speed */ |
| setup_sci1(card->bitrate_register); |
| |
| /* get CID register */ |
| if (send_cmd(CMD_SEND_CID, 0, response)) |
| return -8; |
| if (receive_cxd((unsigned char*)card->cid)) |
| return -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())) |
| { |
| mutex_lock(&mmc_mutex); |
| select_card(card_no); |
| deselect_card(); |
| mutex_unlock(&mmc_mutex); |
| } |
| return card; |
| } |
| |
| /* Receive one sector with dma, possibly swapping the previously received |
| * sector in the background */ |
| static int receive_sector(unsigned char *inbuf, unsigned char *swapbuf, |
| int 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 2 */ |
| CHCR2 = 0; /* disable */ |
| SAR2 = RDR1_ADDR; |
| DAR2 = (unsigned long) inbuf; |
| DTCR2 = SECTOR_SIZE; |
| CHCR2 = 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. */ |
| |
| if (swapbuf != NULL) /* bitswap previous sector */ |
| bitswap(swapbuf, SECTOR_SIZE); |
| yield(); /* be nice */ |
| |
| while (!(CHCR2 & 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 */ |
| return 0; |
| } |
| |
| /* copies one sector into the next-current write buffer, then bitswaps */ |
| static void swapcopy_sector(const unsigned char *buf) |
| { |
| unsigned char *curbuf; |
| |
| current_buffer ^= 1; /* toggles between 0 and 1 */ |
| |
| curbuf = sector_buffer[current_buffer]; |
| curbuf[1] = DT_START_WRITE_MULTIPLE; |
| curbuf[(SECTOR_SIZE+2)] = curbuf[(SECTOR_SIZE+3)] = 0xFF; /* dummy crc */ |
| memcpy(curbuf + 2, buf, SECTOR_SIZE); |
| bitswap(curbuf + 1, (SECTOR_SIZE+1)); |
| } |
| |
| /* Send one sector with dma from the current sector buffer, possibly preparing |
| * the next sector within the other sector buffer in the background. Use |
| * for multisector transfer only */ |
| static int send_sector(const unsigned char *nextbuf, int timeout) |
| { |
| int ret = 0; |
| |
| while (!(SSR1 & SCI_TEND)); /* wait for end of transfer */ |
| |
| SCR1 = 0; /* disable serial */ |
| SSR1 = 0; /* clear all flags */ |
| |
| /* setup DMA channel 2 */ |
| CHCR2 = 0; /* disable */ |
| SAR2 = (unsigned long)(sector_buffer[current_buffer] + 1); |
| DAR2 = TDR1_ADDR; |
| DTCR2 = (SECTOR_SIZE+3); |
| CHCR2 = 0x1701; /* fixed dest. address, TXI1, enable */ |
| DMAOR = 0x0001; |
| SCR1 = (SCI_TE|SCI_TIE); /* kick off DMA */ |
| |
| if (nextbuf != NULL) /* prepare next sector */ |
| swapcopy_sector(nextbuf); |
| yield(); /* be nice */ |
| |
| while (!(CHCR2 & 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 */ |
| ret = -1; |
| |
| write_transfer(dummy, 1); |
| |
| return ret; |
| } |
| |
| /* Send one sector with polled i/o. Use for single sector transfers only. */ |
| static int send_single_sector(const unsigned char *buf, int timeout) |
| { |
| int ret = 0; |
| unsigned char start_token = DT_START_BLOCK; |
| |
| write_transfer(&start_token, 1); |
| write_transfer(buf, SECTOR_SIZE); |
| write_transfer(dummy, 2); /* crc - dontcare */ |
| |
| if ((poll_busy(timeout) & 0x1F) != 0x05) /* something went wrong */ |
| ret = -1; |
| |
| write_transfer(dummy, 1); |
| |
| return ret; |
| } |
| |
| int ata_read_sectors(unsigned long start, |
| int incount, |
| void* inbuf) |
| { |
| int ret = 0; |
| int i; |
| unsigned long addr; |
| unsigned char response; |
| void *inbuf_prev = NULL; |
| tCardInfo *card = &card_info[current_card]; |
| |
| addr = start * SECTOR_SIZE; |
| |
| mutex_lock(&mmc_mutex); |
| ret = select_card(current_card); |
| |
| if (ret == 0) |
| { |
| if (incount == 1) |
| { |
| ret = send_cmd(CMD_READ_SINGLE_BLOCK, addr, &response); |
| if (ret == 0) |
| { |
| ret = receive_sector(inbuf, inbuf_prev, card->read_timeout); |
| inbuf_prev = inbuf; |
| last_disk_activity = current_tick; |
| } |
| } |
| else |
| { |
| ret = send_cmd(CMD_READ_MULTIPLE_BLOCK, addr, &response); |
| for (i = 0; (i < incount) && (ret == 0); i++) |
| { |
| ret = receive_sector(inbuf, inbuf_prev, card->read_timeout); |
| inbuf_prev = inbuf; |
| inbuf += SECTOR_SIZE; |
| last_disk_activity = current_tick; |
| } |
| if (ret == 0) |
| ret = send_cmd(CMD_STOP_TRANSMISSION, 0, &response); |
| } |
| if (ret == 0) |
| bitswap(inbuf_prev, SECTOR_SIZE); |
| } |
| |
| deselect_card(); |
| mutex_unlock(&mmc_mutex); |
| |
| /* only flush if reading went ok */ |
| if ( (ret == 0) && delayed_write ) |
| ata_flush(); |
| |
| return ret; |
| } |
| |
| int ata_write_sectors(unsigned long start, |
| int count, |
| const void* buf) |
| { |
| int ret = 0; |
| int i; |
| unsigned long addr; |
| unsigned char response; |
| tCardInfo *card = &card_info[current_card]; |
| |
| if (start == 0) |
| panicf("Writing on sector 0\n"); |
| |
| addr = start * SECTOR_SIZE; |
| |
| mutex_lock(&mmc_mutex); |
| ret = select_card(current_card); |
| |
| if (ret == 0) |
| { |
| if (count == 1) |
| { |
| ret = send_cmd(CMD_WRITE_BLOCK, addr, &response); |
| if (ret == 0) |
| ret = send_single_sector(buf, card->write_timeout); |
| last_disk_activity = current_tick; |
| } |
| else |
| { |
| swapcopy_sector(buf); /* prepare first sector */ |
| ret = send_cmd(CMD_WRITE_MULTIPLE_BLOCK, addr, &response); |
| for (i = 1; (i < count) && (ret == 0); i++) |
| { |
| buf += SECTOR_SIZE; |
| ret = send_sector(buf, card->write_timeout); |
| last_disk_activity = current_tick; |
| } |
| if (ret == 0) |
| { |
| ret = send_sector(NULL, card->write_timeout); |
| if (ret == 0) |
| { |
| response = DT_STOP_TRAN; |
| write_transfer(&response, 1); |
| poll_busy(card->write_timeout); |
| } |
| last_disk_activity = current_tick; |
| } |
| } |
| } |
| |
| deselect_card(); |
| mutex_unlock(&mmc_mutex); |
| |
| /* only flush if writing went ok */ |
| if ( (ret == 0) && delayed_write ) |
| ata_flush(); |
| |
| return ret; |
| } |
| |
| /* While there is no spinup, the delayed write is still here to avoid |
| wearing the flash unnecessarily */ |
| extern void ata_delayed_write(unsigned long sector, const void* buf) |
| { |
| memcpy(delayed_sector, buf, SECTOR_SIZE); |
| delayed_sector_num = sector; |
| delayed_write = true; |
| } |
| |
| extern void ata_flush(void) |
| { |
| if ( delayed_write ) { |
| DEBUGF("ata_flush()\n"); |
| delayed_write = false; |
| ata_write_sectors(delayed_sector_num, 1, delayed_sector); |
| } |
| } |
| |
| 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; |
| } |
| |
| int ata_standby(int time) |
| { |
| (void)time; |
| |
| return 0; |
| } |
| |
| int ata_sleep(void) |
| { |
| return 0; |
| } |
| |
| void ata_spin(void) |
| { |
| } |
| |
| bool mmc_detect(void) |
| { |
| return adc_read(ADC_MMC_SWITCH) < 0x200 ? true : false; |
| } |
| |
| static void mmc_tick(void) |
| { |
| bool current_status; |
| |
| 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--; |
| |
| /* Report to the thread if we have had 3 identical status |
| readings in a row */ |
| if (countdown == 0) |
| { |
| if (current_status) |
| { |
| queue_broadcast(SYS_MMC_INSERTED, NULL); |
| } |
| else |
| { |
| queue_broadcast(SYS_MMC_EXTRACTED, NULL); |
| 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 */ |
| } |
| 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(); |
| if (last_mmc_status) |
| { /* MMC inserted */ |
| current_card = 1; |
| } |
| else |
| { /* no MMC, use internal memory */ |
| current_card = 0; |
| } |
| |
| ata_enable(true); |
| |
| if ( !initialized ) |
| { |
| tick_add_task(mmc_tick); |
| initialized = true; |
| } |
| |
| return rc; |
| } |
| |