diff options
Diffstat (limited to 'firmware/target/arm/imx233/sd-imx233.c')
-rw-r--r-- | firmware/target/arm/imx233/sd-imx233.c | 279 |
1 files changed, 230 insertions, 49 deletions
diff --git a/firmware/target/arm/imx233/sd-imx233.c b/firmware/target/arm/imx233/sd-imx233.c index 1f2653131e..c17681828f 100644 --- a/firmware/target/arm/imx233/sd-imx233.c +++ b/firmware/target/arm/imx233/sd-imx233.c @@ -51,56 +51,193 @@ static int last_disk_activity; static void sd_detect_callback(int ssp) { (void)ssp; - /* This is called only if the state was stable for 300ms - check state * and post appropriate event. */ if(imx233_ssp_sdmmc_detect(SD_SSP)) queue_broadcast(SYS_HOTSWAP_INSERTED, 0); else queue_broadcast(SYS_HOTSWAP_EXTRACTED, 0); - imx233_ssp_sdmmc_setup_detect(SD_SSP, true, sd_detect_callback); + imx233_ssp_sdmmc_setup_detect(SD_SSP, true, sd_detect_callback, false); +} + +void sd_power(bool on) +{ + #ifdef SANSA_FUZEPLUS + /* The Fuze+ uses pin B0P8 for whatever reason, power ? */ + imx233_set_pin_function(0, 8, PINCTRL_FUNCTION_GPIO); + imx233_enable_gpio_output(0, 8, true); + imx233_set_gpio_output(0, 8, !on); + /* disable pull ups when not needed to save power */ + imx233_ssp_setup_ssp1_sd_mmc_pins(on, 4, PINCTRL_DRIVE_4mA, false); + /* It also setups pin B1P30, unknown purpose */ + imx233_set_pin_function(1, 30, PINCTRL_FUNCTION_GPIO); + imx233_enable_gpio_output(1, 30, false); + #endif } void sd_enable(bool on) { - static bool sd_enable = false; + static int sd_enable = 2; /* 2 means not on and not off, for init purpose */ if(sd_enable == on) return; - - mutex_lock(&sd_mutex); - if(on) - imx233_ssp_start(SD_SSP); - else - imx233_ssp_stop(SD_SSP); - mutex_unlock(&sd_mutex); + sd_enable = on; } +#define MCI_NO_RESP 0 +#define MCI_RESP (1<<0) +#define MCI_LONG_RESP (1<<1) +#define MCI_ACMD (1<<2) +#define MCI_NOCRC (1<<3) +#define MCI_BUSY (1<<4) + +static bool send_cmd(uint8_t cmd, uint32_t arg, uint32_t flags, uint32_t *resp) +{ + if((flags & MCI_ACMD) && !send_cmd(SD_APP_CMD, card_info.rca, MCI_RESP, resp)) + return false; + + enum imx233_ssp_resp_t resp_type = (flags & MCI_LONG_RESP) ? SSP_LONG_RESP : + (flags & MCI_RESP) ? SSP_SHORT_RESP : SSP_NO_RESP; + enum imx233_ssp_error_t ret = imx233_ssp_sd_mmc_transfer(SD_SSP, cmd, arg, + resp_type, NULL, 0, !!(flags & MCI_BUSY), false, resp); + if(resp_type == SSP_LONG_RESP) + { + /* Our SD codes assume most significant word first, so reverse resp */ + uint32_t tmp = resp[0]; + resp[0] = resp[3]; + resp[3] = tmp; + tmp = resp[1]; + resp[1] = resp[2]; + resp[2] = tmp; + } + return ret == SSP_SUCCESS; +} + +static int sd_wait_for_tran_state(void) +{ + unsigned long response; + unsigned int timeout = current_tick + 5*HZ; + int cmd_retry = 10; + + while (1) + { + while(!send_cmd(SD_SEND_STATUS, card_info.rca, SSP_SHORT_RESP, &response) && cmd_retry > 0) + cmd_retry--; + + if(cmd_retry <= 0) + return -1; + + if(((response >> 9) & 0xf) == SD_TRAN) + return 0; + + if(TIME_AFTER(current_tick, timeout)) + return -10 * ((response >> 9) & 0xf); + + last_disk_activity = current_tick; + } +} + static int sd_init_card(void) { + sd_enable(false); + sd_power(false); + sd_power(true); + sd_enable(true); imx233_ssp_start(SD_SSP); imx233_ssp_softreset(SD_SSP); imx233_ssp_set_mode(SD_SSP, HW_SSP_CTRL1__SSP_MODE__SD_MMC); /* SSPCLK @ 96MHz * gives bitrate of 96000 / 240 / 1 = 400kHz */ imx233_ssp_set_timings(SD_SSP, 240, 0, 0xffff); + + imx233_ssp_sd_mmc_power_up_sequence(SD_SSP); imx233_ssp_set_bus_width(SD_SSP, 1); imx233_ssp_set_block_size(SD_SSP, 9); card_info.rca = 0; - bool is_v2 = false; + bool sd_v2 = false; uint32_t resp; + long init_timeout; /* go to idle state */ - int ret = imx233_ssp_sd_mmc_transfer(SD_SSP, SD_GO_IDLE_STATE, 0, SSP_NO_RESP, NULL, 0, false, false, NULL); - if(ret != 0) + if(!send_cmd(SD_GO_IDLE_STATE, 0, MCI_NO_RESP, NULL)) return -1; /* CMD8 Check for v2 sd card. Must be sent before using ACMD41 - Non v2 cards will not respond to this command*/ - ret = imx233_ssp_sd_mmc_transfer(SD_SSP, SD_SEND_IF_COND, 0x1AA, SSP_SHORT_RESP, NULL, 0, false, false, &resp); - if(ret == 0 && (resp & 0xFFF) == 0x1AA) - is_v2 = true; + Non v2 cards will not respond to this command */ + if(send_cmd(SD_SEND_IF_COND, 0x1AA, MCI_RESP, &resp)) + if((resp & 0xFFF) == 0x1AA) + sd_v2 = true; + /* timeout for initialization is 1sec, from SD Specification 2.00 */ + init_timeout = current_tick + HZ; + do + { + /* this timeout is the only valid error for this loop*/ + if(TIME_AFTER(current_tick, init_timeout)) + return -2; + + /* ACMD41 For v2 cards set HCS bit[30] & send host voltage range to all */ + if(!send_cmd(SD_APP_OP_COND, (0x00FF8000 | (sd_v2 ? 1<<30 : 0)), + MCI_ACMD|MCI_NOCRC|MCI_RESP, &card_info.ocr)) + return -100; + } while(!(card_info.ocr & (1<<31))); + + /* CMD2 send CID */ + if(!send_cmd(SD_ALL_SEND_CID, 0, MCI_RESP|MCI_LONG_RESP, card_info.cid)) + return -3; + + /* CMD3 send RCA */ + if(!send_cmd(SD_SEND_RELATIVE_ADDR, 0, MCI_RESP, &card_info.rca)) + return -4; + + /* Try to switch V2 cards to HS timings, non HS seem to ignore this */ + if(sd_v2) + { + /* CMD7 w/rca: Select card to put it in TRAN state */ + if(!send_cmd(SD_SELECT_CARD, card_info.rca, MCI_RESP, NULL)) + return -5; + + if(sd_wait_for_tran_state()) + return -6; + + /* CMD6 */ + if(!send_cmd(SD_SWITCH_FUNC, 0x80fffff1, MCI_NO_RESP, NULL)) + return -7; + sleep(HZ/10); + + /* go back to STBY state so we can read csd */ + /* CMD7 w/rca=0: Deselect card to put it in STBY state */ + if(!send_cmd(SD_DESELECT_CARD, 0, MCI_NO_RESP, NULL)) + return -8; + } + + /* CMD9 send CSD */ + if(!send_cmd(SD_SEND_CSD, card_info.rca, MCI_RESP|MCI_LONG_RESP, card_info.csd)) + return -9; + + sd_parse_csd(&card_info); + + /* SSPCLK @ 96MHz + * gives bitrate of 96 / 4 / 1 = 24MHz */ + imx233_ssp_set_timings(SD_SSP, 4, 0, 0xffff); + + /* CMD7 w/rca: Select card to put it in TRAN state */ + if(!send_cmd(SD_SELECT_CARD, card_info.rca, MCI_RESP, &resp)) + return -12; + if(sd_wait_for_tran_state() < 0) + return -13; + + /* ACMD6: set bus width to 4-bit */ + if(!send_cmd(SD_SET_BUS_WIDTH, 2, MCI_RESP|MCI_ACMD, &resp)) + return -15; + /* ACMD42: disconnect the pull-up resistor on CD/DAT3 */ + if(!send_cmd(SD_SET_CLR_CARD_DETECT, 0, MCI_RESP|MCI_ACMD, &resp)) + return -17; + + /* Switch to 4-bit */ + imx233_ssp_set_bus_width(SD_SSP, 4); + + card_info.initialized = 1; - return -10; + return 0; } static void sd_thread(void) NORETURN_ATTR; @@ -117,6 +254,7 @@ static void sd_thread(void) case SYS_HOTSWAP_INSERTED: case SYS_HOTSWAP_EXTRACTED: { + int microsd_init = 1; fat_lock(); /* lock-out FAT activity first - prevent deadlocking via disk_mount that would cause a reverse-order attempt with @@ -135,29 +273,25 @@ static void sd_thread(void) if(ev.id == SYS_HOTSWAP_INSERTED) { - int ret = sd_init_card(); - if(ret == 0) - { - ret = disk_mount(sd_first_drive); /* 0 if fail */ - if(ret < 0) - DEBUGF("disk_mount failed: %d", ret); - } - else - DEBUGF("sd_init_card failed: %d", ret); - } + microsd_init = sd_init_card(); + if(microsd_init < 0) /* initialisation failed */ + panicf("microSD init failed : %d", microsd_init); + microsd_init = disk_mount(sd_first_drive); /* 0 if fail */ + } /* * Mount succeeded, or this was an EXTRACTED event, * in both cases notify the system about the changed filesystems */ - if(card_info.initialized) + if(microsd_init) queue_broadcast(SYS_FS_CHANGED, 0); + sd_enable(false); /* Access is now safe */ mutex_unlock(&sd_mutex); fat_unlock(); - } break; + } case SYS_TIMEOUT: if(!TIME_BEFORE(current_tick, last_disk_activity+(3*HZ))) sd_enable(false); @@ -177,42 +311,89 @@ int sd_init(void) queue_init(&sd_queue, true); create_thread(sd_thread, sd_stack, sizeof(sd_stack), 0, sd_thread_name IF_PRIO(, PRIORITY_USER_INTERFACE) IF_COP(, CPU)); + sd_enable(false); + imx233_ssp_sdmmc_setup_detect(SD_SSP, true, sd_detect_callback, false); + + return 0; +} - #ifdef SANSA_FUZEPLUS - imx233_ssp_setup_ssp1_sd_mmc_pins(true, 4, PINCTRL_DRIVE_8mA, false); - #endif - imx233_ssp_sdmmc_setup_detect(SD_SSP, true, sd_detect_callback); +static int transfer_sectors(IF_MD2(int drive,) unsigned long start, int count, void *buf, bool read) +{ + IF_MD((void) drive); + int ret = 0; + uint32_t resp; + unsigned long old_start = start; + int old_count = count; - if(imx233_ssp_sdmmc_detect(SD_SSP)) - queue_broadcast(SYS_HOTSWAP_INSERTED, 0); + last_disk_activity = current_tick; + + mutex_lock(&sd_mutex); + sd_enable(true); + + if(card_info.initialized <= 0) + { + ret = sd_init_card(); + if(card_info.initialized <= 0) + goto Lend; + } - return 0; + if(!send_cmd(SD_SELECT_CARD, card_info.rca, SSP_NO_RESP, NULL)) + { + ret = -20; + goto Lend; + } + ret = sd_wait_for_tran_state(); + if(ret < 0) + goto Ldeselect; + while(count != 0) + { + int this_count = MIN(count, IMX233_MAX_SSP_XFER_SIZE / 512); + /* Set bank_start to the correct unit (blocks or bytes) */ + int bank_start = start; + if(!(card_info.ocr & (1<<30))) /* not SDHC */ + bank_start *= SD_BLOCK_SIZE; + ret = imx233_ssp_sd_mmc_transfer(SD_SSP, read ? SD_READ_MULTIPLE_BLOCK : SD_WRITE_MULTIPLE_BLOCK, + bank_start, SSP_SHORT_RESP, buf, this_count, false, read, &resp); + if(ret != SSP_SUCCESS) + break; + if(!send_cmd(SD_STOP_TRANSMISSION, 0, SSP_SHORT_RESP|MCI_BUSY, &resp)) + { + ret = -15; + break; + } + count -= this_count; + start += this_count; + buf += this_count * 512; + } + + Ldeselect: + /* CMD7 w/rca =0 : deselects card & puts it in STBY state */ + if(!send_cmd(SD_DESELECT_CARD, 0, SSP_NO_RESP, NULL)) + ret = -23; + Lend: + mutex_unlock(&sd_mutex); + if(ret != 0) + panicf("transfer_sectors(%d,%d,%d,%d,%d,%d)", drive, start, count, read, + old_start, old_count); + return ret; } int sd_read_sectors(IF_MD2(int drive,) unsigned long start, int count, void* buf) { - IF_MD((void) drive); - (void) start; - (void) count; - (void) buf; - return -1; + return transfer_sectors(IF_MD2(drive,) start, count, buf, true); } int sd_write_sectors(IF_MD2(int drive,) unsigned long start, int count, const void* buf) { - IF_MD((void) drive); - (void) start; - (void) count; - (void) buf; - return -1; + return transfer_sectors(IF_MD2(drive,) start, count, (void *)buf, false); } tCardInfo *card_get_info_target(int card_no) { (void)card_no; - return NULL; + return &card_info; } int sd_num_drives(int first_drive) @@ -235,6 +416,6 @@ bool sd_removable(IF_MD(int drive)) long sd_last_disk_activity(void) { - return 0; + return last_disk_activity; } |