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imx233/fuze+: add support for sd card, enable FAT16 support because it's common on sd cards

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@31268 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Amaury Pouly 2011-12-15 17:06:55 +00:00
parent ddd594b03e
commit 489296afa3
4 changed files with 254 additions and 77 deletions
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281
firmware/target/arm/imx233/sd-imx233.c
View file

@ -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));
#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);
if(imx233_ssp_sdmmc_detect(SD_SSP))
queue_broadcast(SYS_HOTSWAP_INSERTED, 0);
sd_enable(false);
imx233_ssp_sdmmc_setup_detect(SD_SSP, true, sd_detect_callback, false);
return 0;
}
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;
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;
}
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;
}

41
firmware/target/arm/imx233/ssp-imx233.c
View file

@ -38,7 +38,8 @@ struct ssp_dma_command_t
uint32_t cmd1;
};
static int ssp_in_use = 0;
static bool ssp_in_use[2];
static int ssp_nr_in_use = 0;
static struct mutex ssp_mutex[2];
static struct semaphore ssp_sema[2];
static struct ssp_dma_command_t ssp_dma_cmd[2];
@ -82,7 +83,7 @@ void imx233_ssp_init(void)
__REG_SET(HW_SSP_CTRL0(1)) = __BLOCK_CLKGATE;
__REG_SET(HW_SSP_CTRL0(2)) = __BLOCK_CLKGATE;
ssp_in_use = 0;
ssp_nr_in_use = 0;
semaphore_init(&ssp_sema[0], 1, 0);
semaphore_init(&ssp_sema[1], 1, 0);
mutex_init(&ssp_mutex[0]);
@ -92,12 +93,15 @@ void imx233_ssp_init(void)
void imx233_ssp_start(int ssp)
{
if(ssp_in_use[ssp - 1])
return;
ssp_in_use[ssp - 1] = true;
/* Gate block */
imx233_reset_block(&HW_SSP_CTRL0(ssp));
/* Gate dma channel */
imx233_dma_clkgate_channel(APB_SSP(ssp), true);
/* If first block to start, start SSP clock */
if(ssp_in_use == 0)
if(ssp_nr_in_use == 0)
{
/** 2.3.1: the clk_ssp maximum frequency is 102.858 MHz */
/* fracdiv = 18 => clk_io = pll = 480Mhz
@ -108,18 +112,21 @@ void imx233_ssp_start(int ssp)
imx233_set_bypass_pll(CLK_SSP, false); /* use IO */
imx233_enable_clock(CLK_SSP, true);
}
ssp_in_use++;
ssp_nr_in_use++;
}
void imx233_ssp_stop(int ssp)
{
if(!ssp_in_use[ssp - 1])
return;
ssp_in_use[ssp - 1] = false;
/* Gate off */
__REG_SET(HW_SSP_CTRL0(ssp)) = __BLOCK_CLKGATE;
/* Gate off dma */
imx233_dma_clkgate_channel(APB_SSP(ssp), false);
/* If last block to stop, stop SSP clock */
ssp_in_use--;
if(ssp_in_use == 0)
ssp_nr_in_use--;
if(ssp_nr_in_use == 0)
{
imx233_enable_clock(CLK_SSP, false);
imx233_set_fractional_divisor(CLK_IO, 0);
@ -137,24 +144,6 @@ void imx233_ssp_set_timings(int ssp, int divide, int rate, int timeout)
timeout << HW_SSP_TIMING__CLOCK_TIMEOUT_BP;
}
#if 0
static void setup_ssp_sd_pins(int ssp)
{
imx233_set_pin_function(1, 29, PINCTRL_FUNCTION_GPIO);
imx233_enable_gpio_output(1, 29, true);
imx233_set_gpio_output(1, 29, false);
if(ssp == 1)
{
}
else
{
}
}
#endif
void imx233_ssp_setup_ssp1_sd_mmc_pins(bool enable_pullups, unsigned bus_width,
unsigned drive_strength, bool use_alt)
{
@ -352,7 +341,7 @@ static void detect_irq(int bank, int pin)
timeout_register(&ssp2_detect_oneshot, ssp2_detect_oneshot_callback, (3*HZ/10), 0);
}
void imx233_ssp_sdmmc_setup_detect(int ssp, bool enable, ssp_detect_cb_t fn)
void imx233_ssp_sdmmc_setup_detect(int ssp, bool enable, ssp_detect_cb_t fn, bool first_time)
{
int bank = ssp == 1 ? 2 : 0;
int pin = ssp == 1 ? 1 : 19;
@ -362,6 +351,8 @@ void imx233_ssp_sdmmc_setup_detect(int ssp, bool enable, ssp_detect_cb_t fn)
imx233_set_pin_function(bank, pin, PINCTRL_FUNCTION_GPIO);
imx233_enable_gpio_output(bank, pin, false);
}
if(first_time && imx233_ssp_sdmmc_detect(ssp))
detect_irq(bank, pin);
imx233_setup_pin_irq(bank, pin, enable, true, !imx233_ssp_sdmmc_detect(ssp), detect_irq);
}

6
firmware/target/arm/imx233/ssp-imx233.h
View file

@ -168,8 +168,10 @@ void imx233_ssp_setup_ssp1_sd_mmc_pins(bool enable_pullups, unsigned bus_width,
void imx233_ssp_setup_ssp2_sd_mmc_pins(bool enable_pullups, unsigned bus_width,
unsigned drive_strength);
/* after callback is fired, imx233_ssp_sdmmc_setup_detect needs to be called
* to enable detection again */
void imx233_ssp_sdmmc_setup_detect(int ssp, bool enable, ssp_detect_cb_t fn);
* to enable detection again. If first_time is true, the callback will
* be called if the sd card is inserted when the function is called, otherwise
* it will be called on the next insertion change. */
void imx233_ssp_sdmmc_setup_detect(int ssp, bool enable, ssp_detect_cb_t fn, bool first_time);
bool imx233_ssp_sdmmc_detect(int ssp);
/* SD/MMC requires that the card be provided the clock during an init sequence of
* at least 1msec (or 74 clocks). Does NOT touch the clock so it has to be correct. */