Antwort: Re: Re: Re: Re: nor flash board init code

[christian.buettner@rafi.de]

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Got the solution!

PINMUX:
    /*SPI*/
    MX53_PAD_EIM_D17__ECSPI1_MISO, //SPI MISO - EEPROM SO
    MX53_PAD_EIM_D18__ECSPI1_MOSI, //SPI MOSI - EEPROM SI
    MX53_PAD_EIM_D16__ECSPI1_SCLK, //SPI SCLK - EEPROM SCK
    MX53_PAD_EIM_EB2__GPIO2_30, //SPI SS0 - EEPROM CS

Data Structures:
#define ECUv6_ECSPI1_CS0 IMX_GPIO_NR(2, 30)


//SPI Flash
const struct flash_platform_data tx53_flash = {
    .type       = "mx25l8005",
    .name       = "spi_flash",
};


//MX25L8005MC-15G
static const struct spi_board_info mx53_spi_board_info[] = {
        {
                .name = "m25p",
                .max_speed_hz = 30000000,
                .bus_num = 0,
                .chip_select = 0,
                .bits_per_word = 8,
                .mode = SPI_MODE_0,
                .platform_data = (void*)&tx53_flash,
        },
};

static int ecspi_0_cs[] = { ECUv6_ECSPI1_CS0 };


static struct spi_imx_master tx53_spi = {
                .chipselect = ecspi_0_cs,
                .num_chipselect = ARRAY_SIZE(ecspi_0_cs),
};

Problem was:
The internal chipselect did not work -> Using the GPIO for Chipselect and 
the PinMux 'SPI to GPIO' (not 'SPI to SSO')
and a lower hz setting (not the max. 70000000) made the spi flash 
working!!

christian



Von:    Franck Jullien <franck.jullien@gmail.com>
An:     christian.buettner@rafi.de, 
Kopie:  barebox@lists.infradead.org
Datum:  30.07.2012 16:28
Betreff:        Re: Re: Re: Re: nor flash board init code



2012/7/30  <christian.buettner@rafi.de>:
> i always get the response:
>
> m25p@m25p0: unrecognized JEDEC id ffffff
>
> SPI Flah:MX25L8005MC-15G
> CPU: imx53
>
> Here is my board init code:
>
> //SPI + FLASH structs
> const struct flash_platform_data tx53_flash = {
>     .type       = "mx25l8005",
>     .name       = "spi_flash",
> };
>
>
> //MX25L8005MC-15G
> static const struct spi_board_info mx53_spi_board_info[] = {
>         {
>                 .name = "m25p",
>                 .max_speed_hz = 30000000,
>                 .bus_num = 0,
>                 .chip_select = 0,
>                 .bits_per_word = 8,
>                 .mode = SPI_MODE_0,
>                 .platform_data = &tx53_flash,
>         },
> };
>
> static struct spi_imx_master tx53_spi = {
>                 .num_chipselect = 1,
> };
>

I'm not familiar with the IMX spi but in the tx51 or ccxmx51 board
file one can read:

static struct spi_imx_master tx51_spi_0_data = {
                 .chipselect = spi_0_cs,
                 .num_chipselect = ARRAY_SIZE(spi_0_cs),
};

#define CCXMX51_ECSPI1_CS0               IMX_GPIO_NR(4, 24)
#define CCXMX51_ECSPI1_CS1               IMX_GPIO_NR(4, 25)

static int ecspi_0_cs[] = { CCXMX51_ECSPI1_CS0, CCXMX51_ECSPI1_CS1, };

static struct spi_imx_master ecspi_0_data = {
                 .chipselect             = ecspi_0_cs,
                 .num_chipselect                 = ARRAY_SIZE(ecspi_0_cs),
};

Don't you need to set .chipselect ?


>
>
> //PIN MUX:
> MX53_PAD_EIM_D17__ECSPI1_MISO, //SPI MISO - EEPROM SO
> MX53_PAD_EIM_D18__ECSPI1_MOSI, //SPI MOSI - EEPROM SI
> MX53_PAD_EIM_D16__ECSPI1_SCLK, //SPI SCLK - EEPROM SCK
> MX53_PAD_EIM_EB2__ECSPI1_SS0,  //SPI SS1 - EEPROM CS
>
>
> //device init code:
>  spi_register_board_info(mx53_spi_board_info,
>                     ARRAY_SIZE(mx53_spi_board_info));
>
> imx53_add_spi0(&tx53_spi);
>
>
> Any ideas, whats wrong?
>
> christian
>
>
> Von:        Franck Jullien <franck.jullien@gmail.com>
> An:        christian.buettner@rafi.de,
> Kopie:        barebox@lists.infradead.org
> Datum:        30.07.2012 10:33
> Betreff:        Re: Re: Re: nor flash board init code
> ________________________________
>
>
>
> 2012/7/30  <christian.buettner@rafi.de>:
>> Whooosch and it worked!
>>
>> devinfo
>> devices:
>> ...
>> `---- mem1
>>      `---- 0x00000000-0xfffffffe: /dev/mem
>> `---- i2c-imx2
>> `---- imx_spi0
>>      `---- m25p0
>> `---- fec_imx0
>>      `---- miidev0
>> ...
>>
>> barebox:/ devinfo m25p0
>> resources:
>> driver: none
>>
>> no parameters available
>> barebox:/
>>
>> But why is driver in devinfo = none?
>>
>
> It used to work. You need to find why it doesn't work anymore ;)
>
>> christian
>>
>>
>> Von:        Franck Jullien <franck.jullien@gmail.com>
>> An:        christian.buettner@rafi.de,
>> Kopie:        barebox@lists.infradead.org
>> Datum:        30.07.2012 10:07
>> Betreff:        Re: Re: nor flash board init code
>> ________________________________
>>
>>
>>
>> Hi,
>>
>> 2012/7/30 <christian.buettner@rafi.de>
>>>
>>> Thanks for the code!
>>>
>>> Here is my approach:
>>>
>>> const struct flash_platform_data tx53_flash = {
>>>     .type       = "mx25l8005",
>>>     .name       = "spi_flash",
>>> };
>>>
>>>
>>> //MX25L8005MC-15G
>>> static const struct spi_board_info mx53_spi_board_info[] = {
>>>         {
>>>                 .name = "mx25l8005",
>>
>>
>> Here sould be the driver name: .name = "m25p",
>>
>>>
>>>                 .max_speed_hz = 70000000,
>>>                 .bus_num = 0,
>>>                 .chip_select = 0,
>>>                 .bits_per_word = 8,
>>>                 .mode = SPI_MODE_0,
>>>                 .platform_data = &tx53_flash,
>>>         },
>>> };
>>>
>>> static struct spi_imx_master tx53_spi = {
>>>                 .num_chipselect = 1,
>>> };
>>>
>>>
>>> init_devices {
>>>
>>> ...
>>>     spi_register_board_info(mx53_spi_board_info,
>>>                     ARRAY_SIZE(mx53_spi_board_info));
>>>
>>>     add_generic_device("m25p",-1,"m25p",MX53_ECSPI1_BASE_ADDR,64 *
>>> 1024,IORESOURCE_MEM,&mx53_spi_board_info);
>>
>> You have to add the SPI master device here. The m25p device will be
>> probed automagically (AFAIR).
>>
>>
>>>
>>> ...
>>> }
>>>
>>>
>>> When the m25p80.c driver probes i get no spi instance:
>>>
>>> static int m25p_probe(struct device_d *dev) {
>>>         struct spi_device *spi = (struct spi_device *)dev->type_data;
>>>         const struct spi_device_id        *id = NULL;
>>> ...
>>> }
>>>
>>> struct spi_device *spi is always null
>>>
>>> Whats wrong here?
>>>
>>> christian
>>>
>>>
>>>
>>> Von:        Franck Jullien <franck.jullien@gmail.com>
>>> An:        christian.buettner@rafi.de,
>>> Kopie:        barebox@lists.infradead.org
>>> Datum:        27.07.2012 13:33
>>> Betreff:        Re: nor flash board init code
>>> ________________________________
>>>
>>>
>>>
>>> 2012/7/25 <christian.buettner@rafi.de>
>>> >
>>> > hi all,
>>> > is there any example board init code to load the mx25l8005 spi
>>> > nor-flash
>>> > through the imx53 (TX53 from KARO)?
>>> > I want to use the m25p80 driver to read and write.
>>> >
>>> > christian
>>> > _______________________________________________
>>> > barebox mailing list
>>> > barebox@lists.infradead.org
>>> > http://lists.infradead.org/mailman/listinfo/barebox
>>> >
>>>
>>> Hi Christian,
>>>
>>> This is what I use with the Altera SPI controller + an SPI flash 
device:
>>>
>>>
>>>
>>> 
http://www.elec4fun.fr/index.php?option=com_content&view=article&id=10&Itemid=153

>>>
>>> static struct spi_altera_master altera_spi_0_data = {
>>>      .num_chipselect = 1,
>>>      .spi_mode = 0,      /* SPI mode of the EPCS flash controller */
>>>      .databits = 8,      /* Data length of the EPCS flash controller 
*/
>>>      .speed = 20000000,  /* EPCS flash controller speed */
>>> };
>>>
>>>
>>> static struct flash_platform_data epcs_flash = {
>>>      .name = "epcs",    /* Cdev name, optional */
>>>      .type = "m25p40",  /* Device type, required for non JEDEC chips 
*/
>>> };
>>>
>>> static struct spi_board_info generic_spi_board_info[] = {
>>>      {
>>>            .name = "m25p",
>>>            .max_speed_hz = 20000000,
>>>            .bus_num = 0,
>>>            .chip_select = 0,
>>>            .bits_per_word = 8,
>>>            .mode = SPI_MODE_0,
>>>            .platform_data = &epcs_flash,
>>>      }
>>> };
>>>
>>> static int myboard_devices_init(void) {
>>>
>>> ...
>>>
>>> spi_register_board_info(myboard_spi_board_info,
>>> ARRAY_SIZE(myboard_spi_board_info));
>>>
>>> add_generic_device("altera_spi", -1, NULL, NIOS_SOPC_EPCS_BASE, 0x18,
>>>                    IORESOURCE_MEM, &altera_spi_0_data);
>>>
>>> ...
>>>
>>> Franck.
>>>
>>
>> Franck.
>>
>

Do you have a scope ? This is the easiest way to debug SPI ;)


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