2009-05-31 03:37:09     Help: SPORT emulate SPI for SD Card?

2009-05-31 03:37:09     Help: SPORT emulate SPI for SD Card?

Tony Liu (CHINA)

Message: 74832   

I'm using "Device Driver->SPI Support->emulate SPI bus with Blackfin SPORT" to connect a SD Card.

Circuit Connect as below:

SPORT1 function PINS:

TSCLK1 + RSCLK1   -> SD SDCLK

TFS1 + RFS1 -> SD DAT3 (#CS)

DR1PRI -> SD DAT0(As SPI MISO function)

DT1PRI -> SD CMD (As SPI MOSI function)

& build the driver in kernel.

At start  I'm not find the related message of emulate SPI bus with Blackfin SPORT.

cat /proc/interrupts & no find the registed sport interrupt resource.

How to configure & modify ?

Thanks！

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2009-05-31 04:13:33     Re: Help: SPORT emulate SPI for SD Card?

Sonic Zhang (CHINA)

Message: 74833   

Did you build the mmc_spi driver into your kernel as well?

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2009-05-31 04:21:15     Re: Help: SPORT emulate SPI for SD Card?

Yi Li (CHINA)

Message: 74872   

Can you find anything in /sys/bus/spi/ ?

-Yi

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2009-05-31 09:30:29     Re: Help: SPORT emulate SPI for SD Card?

Tony Liu (CHINA)

Message: 74877   

Thanks！

My platform: CPU BF531

uCLinux Dist: 2009R (svn update 20090427)

I added the related __initdata (mach-bf533\boards]\ezkit.c)for SPORT emulate SPI  as below:

#if defined(CONFIG_SPI_BFIN_SPORT) //|| defined(CONFIG_SPI_BFIN_SPORT_MODULE)

/* SPORT SPI controller data */

static struct bfin5xx_spi_master bfin_sport_spi0_info = {

.num_chipselect = 1, /* master only supports one device */

.enable_dma = 0,  /* master don't support DMA */

.pin_req = {P_SPORT0_DTPRI, P_SPORT0_TSCLK, P_SPORT0_DRPRI,

P_SPORT0_RSCLK, P_SPORT0_TFS, P_SPORT0_RFS, 0},

};

static struct resource bfin_sport_spi0_resource[] = {

[0] = {

.start = SPORT0_TCR1,

.end   = SPORT0_TCR1 + 0xFF,

.flags = IORESOURCE_MEM,

},

[1] = {

.start = IRQ_SPORT0_ERROR,

.end   = IRQ_SPORT0_ERROR,

.flags = IORESOURCE_IRQ,

},

};

static struct platform_device bfin_sport_spi0_device = {

.name = "bfin-sport-spi",

.id = 1, /* Bus number */

.num_resources = ARRAY_SIZE(bfin_sport_spi0_resource),

.resource = bfin_sport_spi0_resource,

.dev = {

.platform_data = &bfin_sport_spi0_info, /* Passed to driver */

},

};

static struct bfin5xx_spi_master bfin_sport_spi1_info = {

.num_chipselect = 1, /* master only supports one device */

.enable_dma = 0,  /* master don't support DMA */

.pin_req = {P_SPORT1_DTPRI, P_SPORT1_TSCLK, P_SPORT1_DRPRI,

P_SPORT1_RSCLK, P_SPORT1_TFS, P_SPORT1_RFS, 0},

};

static struct resource bfin_sport_spi1_resource[] = {

[0] = {

.start = SPORT1_TCR1,

.end   = SPORT1_TCR1 + 0xFF,

.flags = IORESOURCE_MEM,

},

[1] = {

.start = IRQ_SPORT1_ERROR,

.end   = IRQ_SPORT1_ERROR,

.flags = IORESOURCE_IRQ,

},

};

static struct platform_device bfin_sport_spi1_device = {

.name = "bfin-sport-spi",

.id = 2, /* Bus number */

.num_resources = ARRAY_SIZE(bfin_sport_spi1_resource),

.resource = bfin_sport_spi1_resource,

.dev = {

.platform_data = &bfin_sport_spi1_info, /* Passed to driver */

},

};

#endif  /* sport spi master and devices */

static struct platform_device *ezkit_devices[] __initdata = {

//Tony add

#if defined(CONFIG_SPI_BFIN_SPORT) //|| defined(CONFIG_SPI_BFIN_SPORT_MODULE)

&bfin_sport_spi0_device,

&bfin_sport_spi1_device,

#endif ........................

}

then start message can get:

bfin-sport-spi bfin-sport-spi.1: Blackfin SPORT emulated SPI Driver, Version 1.0, regs_base@ffc00800

bfin-sport-spi bfin-sport-spi.2: Blackfin SPORT emulated SPI Driver, Version 1.0, regs_base@ffc00900

Add the MMC/SD init data at this file:

//tony add

#if 1//defined(CONFIG_MMC_SPI) || defined(CONFIG_MMC_SPI_MODULE) || defined(CONFIG_SPI_BFIN_SPORT)

#define MMC_SPI_CARD_DETECT_INT IRQ_PF5

static int bfin_mmc_spi_init(struct device *dev,irqreturn_t (*detect_int)(int, void *), void *data)

{

        return request_irq(MMC_SPI_CARD_DETECT_INT, detect_int,IRQF_TRIGGER_FALLING, "mmc-spi-detect", data);

}

static void bfin_mmc_spi_exit(struct device *dev, void *data)

{

        free_irq(MMC_SPI_CARD_DETECT_INT, data);

}

static struct mmc_spi_platform_data bfin_mmc_spi_pdata = {

        .init = bfin_mmc_spi_init,

        .exit = bfin_mmc_spi_exit,

        .detect_delay = 100, /* msecs */

};

static struct bfin5xx_spi_chip  mmc_spi_chip_info = {

        .enable_dma = 0,

        .bits_per_word = 8,

};

#endif

static struct spi_board_info bfin_spi_board_info[] __initdata = {

//tony

#if 1//defined(CONFIG_MMC_SPI) || defined(CONFIG_MMC_SPI_MODULE) || defined(CONFIG_SPI_BFIN_SPORT)

        {

                .modalias = "mmc_spi",

                .max_speed_hz = 20000000,     /* max spi clock (SCK) speed in HZ */

                .bus_num = 0,

                .chip_select = 3,

                .platform_data = &bfin_mmc_spi_pdata,

                .controller_data = &mmc_spi_chip_info,

                .mode = SPI_MODE_3,

        },

#endif

...................

}

Not find the /dev/mmcxxxx   device node. & no SD Card start up message.

At /sys/bus dir have :

/sys/bus/spi/device

/sys/bus/spi/drivers/mmc_spi/uevent

/sys/bus/spi/uevent

cat /proc/interrupt

10:   0 INTN sport_err

11:  0  INTN sport_err

How to modify?

Thanks!

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2009-05-31 21:54:50     Re: Help: SPORT emulate SPI for SD Card?

Yi Li (CHINA)

Message: 74879   

You can refer to arch/blackfin/mach-bf537/boards/stamp.c and understant it.

".bus_num = 0," need to be ".bus_num=1" I think.

-Yi

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2009-05-31 23:36:11     Re: Help: SPORT emulate SPI for SD Card?

Sonic Zhang (CHINA)

Message: 74881   

You'd better disable CONFIG_SPI_BFIN, otherwize there are 2 SPI buses in your system. You may set the wrong bus_num in your mmc spi configuration.

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2009-06-01 04:59:03     Re: Help: SPORT emulate SPI for SD Card?

Tony Liu (CHINA)

Message: 74912   

Thanks!

Modify as below:

#if 1//defined(CONFIG_MMC_SPI) || defined(CONFIG_MMC_SPI_MODULE) || defined(CONFIG_SPI_BFIN_SPORT)

        {

                .modalias = "mmc_spi",

                .max_speed_hz = 20000000,     /* max spi clock (SCK) speed in HZ */

                .bus_num = 1,

                .chip_select = 0,

                .platform_data = &bfin_mmc_spi_pdata,

                .controller_data = &mmc_spi_chip_info,

                .mode = SPI_MODE_3,

        },

#endif

start message:

bfin-sport-spi bfin-sport-spi.1: Blackfin SPORT emulated SPI Driver, Version 1.0, regs_base@ffc00800

bfin-sport-spi bfin-sport-spi.2: Blackfin SPORT emulated SPI Driver, Version 1.0, regs_base@ffc00900

mmc_spi spi1.0: ASSUMING 3.2-3.4 V slot power

bfin_mmc_spi_init

mmc_spi spi1.0: SD/MMC host mmc0, no DMA, no WP, no poweroff

TCP cubic registered

NET: Registered protocol family 17

rtc-bfin rtc-bfin: setting system clock to 1970-01-01 03:22:08 UTC (12128)

Freeing unused kernel memory: 5092k freed

status error: TOVF ROVF

BUG: soft lockup - CPU#0 stuck for 61s! [ksoftirqd/0:3]

Modules linked in:

SEQUENCER STATUS:               Not tainted

SEQSTAT: 00000026  IPEND: 8050  SYSCFG: 0006

  EXCAUSE   : 0x26

  interrupts disabled

  physical IVG6 asserted : <0xffa00c64> { _evt_timer + 0x0 }

  physical IVG15 asserted : <0xffa00cd0> { _evt_system_call + 0x0 }

  logical irq   6 mapped  : <0xffa0037c> { _timer_interrupt + 0x0 }

  logical irq  10 mapped  : <0x000ae9b0> { _sport_err_handler + 0x0 }

  logical irq  11 mapped  : <0x000ae9b0> { _sport_err_handler + 0x0 }

  logical irq  14 mapped  : <0x000b14a4> { _bfin_rtc_interrupt + 0x0 }

  logical irq  38 mapped  : <0x000b91ec> { _mmc_spi_detect_irq + 0x0 }

RETE: <0x00000000> { _do_one_initcall + 0xfffff000 }

RETN: <0x00000000> { _do_one_initcall + 0xfffff000 }

RETX: <0x00000000> { _do_one_initcall + 0xfffff000 }

RETS: <0x000af310> { _bfin_sport_spi_u8_duplex + 0xc }

PC  : <0x000af33c> { _bfin_sport_spi_u8_duplex + 0x38 }

DCPLB_FAULT_ADDR: <0x00000000> { _do_one_initcall + 0xfffff000 }

ICPLB_FAULT_ADDR: <0x00000000> { _do_one_initcall + 0xfffff000 }

PROCESSOR STATE:

R0 : 00000040    R1 : 01166b51    R2 : 01166b40    R3 : 01167000

R4 : 0000000a    R5 : 00000100    R6 : 00000014    R7 : 00000001

P0 : ffa00890    P1 : ffc00830    P2 : ffc00810    P3 : 01164da0

P4 : 006ec290    P5 : 01167d44    FP : 006ec2b4    SP : 006d1e38

LB0: 000b201a    LT0: 000b201a    LC0: 00000000

LB1: 00096096    LT1: 0009608a    LC1: 00000000

B0 : 01be9dc4    L0 : 00000000    M0 : 00000010    I0 : 00000004

B1 : 0000ffff    L1 : 00000000    M1 : 00000000    I1 : 01be9e44

B2 : 01be9d80    L2 : 00000000    M2 : 00000000    I2 : 00000010

B3 : 00000000    L3 : 00000000    M3 : 00000000    I3 : 00000001

A0.w: 00000000   A0.x: 00000000   A1.w: 00000000   A1.x: 00000000

USP : 00000000  ASTAT: 02003024

system halt.

Let's go on! HaHaHaHa

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2009-06-01 23:01:46     Re: Help: SPORT emulate SPI for SD Card?

Cliff Cai (CHINA)

Message: 74939   

Tony,

The sport got overflow,I think you need to have a look at the hardware design of sport-spi.

Please refer to:  blackfin.uclinux.org/gf/project/uclinux-dist/tracker/?action=TrackerItemEdit&tracker_item_id=4277

and you need hardware support for SPI_MODE3.

we haven't done full test of this driver,till to now,we've only tested it with SPI-ADC and SPI-flash.

Cliff