Information about Atmel MXT224

Information about Atmel MXT224

[Gaëtan Carlier]

Hello,
I have tried atmel_mxt_ts driver (original driver from kernel 3.6.0 and 
driver from linux-next/master branch copied to kernel 3.6.0) on i.MX27 
board. The capacitive glass used is a "GE Touch" 
SMT-F-057G007-B011-4:3-NP. It has 16 pads in X and 14 pads in Y. It is 
correctly detected (with one warning/error).
The power supply of VDD and AVDD is 2.8V. AVDD will be raised later to 3.3V.
When I push on glass, nothing occurs in evetst nor on /CHG pin of MXT224.

Does someone has some informations or the protocol guide, please ?
Thanks a lot for your help.
Gaëtan Carlier.

Below some code and logs.


Here is my initialization :
8---------------------------------------------------------
/* TSP */
static struct mxt_platform_data mxt_platform_data = {
	.x_line			= 18,
	.y_line			= 11,
	.x_size			= 480,
	.y_size			= 640,
	.blen			= 0x1,
	.threshold		= 0x28,
	.voltage		= 2800000,		/* 2.8V */
	.orient			= MXT_DIAGONAL_COUNTER,
	.irqflags		= IRQF_TRIGGER_FALLING,
};

static struct i2c_board_info imx27gc_i2c0_devices[] = {
	{
		I2C_BOARD_INFO("atmel_mxt_ts", 0x4b),
		.platform_data = &mxt_platform_data,
		/* irq number is run-time assigned */
	},
	/* more devices can be added using expansion connectors */
};

static void __init dvip01_init(void)
{
	dvip01_i2c0_devices[0].irq = gpio_to_irq(MXT_KEY);
}
8---------------------------------------------------------


Here is log of start-up:
8---------------------------------------------------------
atmel_mxt_ts 0-004b: Type 37 Start 106 Size 130 Instances  1 ReportIDs 
  0 :   0
atmel_mxt_ts 0-004b: Type 44 Start 236 Size   1 Instances  1 ReportIDs 
  0 :   0
atmel_mxt_ts 0-004b: Type  5 Start 237 Size   9 Instances  1 ReportIDs 
  0 :   0
atmel_mxt_ts 0-004b: Type  6 Start 246 Size   6 Instances  1 ReportIDs 
  1 :   1
atmel_mxt_ts 0-004b: Type 38 Start 252 Size   8 Instances  1 ReportIDs 
  0 :   0
atmel_mxt_ts 0-004b: Type  7 Start 260 Size   3 Instances  1 ReportIDs 
  0 :   0
atmel_mxt_ts 0-004b: Type  8 Start 263 Size  10 Instances  1 ReportIDs 
  0 :   0
atmel_mxt_ts 0-004b: Type  9 Start 273 Size  35 Instances  1 ReportIDs 
  2 :  11
atmel_mxt_ts 0-004b: Type 18 Start 308 Size   2 Instances  1 ReportIDs 
  0 :   0
atmel_mxt_ts 0-004b: Type 19 Start 310 Size   6 Instances  1 ReportIDs 
12 :  12
atmel_mxt_ts 0-004b: Type 25 Start 316 Size   6 Instances  1 ReportIDs 
13 :  13
atmel_mxt_ts 0-004b: Type 42 Start 322 Size   8 Instances  1 ReportIDs 
14 :  14
atmel_mxt_ts 0-004b: Type 46 Start 330 Size   9 Instances  1 ReportIDs 
15 :  15
atmel_mxt_ts 0-004b: Type 47 Start 339 Size  10 Instances  1 ReportIDs 
  0 :   0
atmel_mxt_ts 0-004b: Type 48 Start 349 Size  54 Instances  1 ReportIDs 
16 :  16
atmel_mxt_ts 0-004b: Type 55 Start 403 Size   4 Instances  1 ReportIDs 
  0 :   0
atmel_mxt_ts 0-004b: No cfg data defined, skipping reg init
atmel_mxt_ts 0-004b: Invalid object type
atmel_mxt_ts 0-004b: Family ID: 129 Variant ID: 1 Major.Minor.Build: 2.0.AB
atmel_mxt_ts 0-004b: Matrix X Size: 16 Matrix Y Size: 14 Object Num: 16
input: Atmel maXTouch Touchscreen as 
/devices/platform/imx-i2c.0/i2c-0/0-004b/input/input0
8---------------------------------------------------------

Here is evtest information :
8---------------------------------------------------------
Input driver version is 1.0.1evdev: (EVIOCGBIT): Suspicious buffer size 
511, limiting output to 64 bytes. See http://userweb.kernel.org/~dtorl

Input device ID: bus 0x18 vendor 0x0 product 0x0 version 0x0
Input device name: "Atmel maXTouch Touchscreen"
Supported events:
   Event type 0 (Sync)
   Event type 1 (Key)
     Event code 330 (Touch)
   Event type 3 (Absolute)
     Event code 0 (X)
       Value      0
       Min        0
       Max      479
     Event code 1 (Y)
       Value      0
       Min        0
       Max      639
     Event code 24 (Pressure)
       Value      0
       Min        0
       Max      255
     Event code 47 (?)
       Value      0
       Min        0
       Max        9
     Event code 48 (?)
       Value      0
       Min        0
       Max      255
     Event code 53 (?)
       Value      0
       Min        0
       Max      479
     Event code 54 (?)
       Value      0
       Min        0
       Max      639
     Event code 57 (?)
       Value      0
       Min        0
       Max    65535
     Event code 58 (?)
       Value      0
       Min        0
       Max      255
Testing ... (interrupt to exit)
8---------------------------------------------------------

Here is /proc/interrupts:
8---------------------------------------------------------
128:          0  gpio-mxc  atmel_mxt_ts
8---------------------------------------------------------

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Re: Information about Atmel MXT224

[Alexander Shiyan]

Среда,  8 января 2014, 8:57 +01:00 от Gaëtan Carlier <gcembed@gmail.com>:
> Hello,
> I have tried atmel_mxt_ts driver (original driver from kernel 3.6.0 and 
> driver from linux-next/master branch copied to kernel 3.6.0) on i.MX27 
> board. The capacitive glass used is a "GE Touch" 
> SMT-F-057G007-B011-4:3-NP. It has 16 pads in X and 14 pads in Y. It is 
> correctly detected (with one warning/error).
> The power supply of VDD and AVDD is 2.8V. AVDD will be raised later to 3.3V.
> When I push on glass, nothing occurs in evetst nor on /CHG pin of MXT224.

Do not forget about setup IOMUX for IRQ pin?

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Re: Information about Atmel MXT224

[Gaëtan Carlier]

Hi,

On 01/08/2014 10:04 AM, Alexander Shiyan wrote:
 > Do not forget about setup IOMUX for IRQ pin?

I don't think so. I follow the same canvas than PMIC_INT. I send my 
email too fast. The init function was incomplete. Below all I do with 
MXT_KEY (PB16) connected to /CHG pin of MXT224.
(Of course, PB16 (CSI_PIXCLK) is not used by another driver)
The problem is not interrupt in Kernel. It is MXT224 that does not send 
it. /CHG pin stay High.

I can send you all source code of board declaration if you want.

Thanks a lot.
Gaëtan Carlier.

8---------------------------------------------------------
#define MXT_KEY                 IMX_GPIO_NR(2, 16)
static const int imx27gc_pins[] __initconst = {
	/* UART1 */
	PE12_PF_UART1_TXD,
	PE13_PF_UART1_RXD,
	PE14_PF_UART1_CTS,
	PE15_PF_UART1_RTS,
	/* UART3 */
	PE8_PF_UART3_TXD,
	PE9_PF_UART3_RXD,
	PE10_PF_UART3_CTS,
	PE11_PF_UART3_RTS,
	/* FEC */
	PD0_AIN_FEC_TXD0,
	PD1_AIN_FEC_TXD1,
	PD2_AIN_FEC_TXD2,
	PD3_AIN_FEC_TXD3,
	PD4_AOUT_FEC_RX_ER,
	PD5_AOUT_FEC_RXD1,
	PD6_AOUT_FEC_RXD2,
	PD7_AOUT_FEC_RXD3,
	PD8_AF_FEC_MDIO,
	PD9_AIN_FEC_MDC,
	PD10_AOUT_FEC_CRS,
	PD11_AOUT_FEC_TX_CLK,
	PD12_AOUT_FEC_RXD0,
	PD13_AOUT_FEC_RX_DV,
	PD14_AOUT_FEC_RX_CLK,
	PD15_AOUT_FEC_COL,
	PD16_AIN_FEC_TX_ER,
	PF23_AIN_FEC_TX_EN,
	/* CSPI2 */
	PD22_PF_CSPI2_SCLK,
	PD23_PF_CSPI2_MISO,
	PD24_PF_CSPI2_MOSI,
	SPI2_SS0 | GPIO_GPIO | GPIO_OUT,
	/* I2C1 */
	PD17_PF_I2C_DATA,
	PD18_PF_I2C_CLK,
	/* I2C2 */
	PC5_PF_I2C2_SDA,
	PC6_PF_I2C2_SCL,
	/* PMIC INT */
	PMIC_INT | GPIO_GPIO | GPIO_IN,
	/* SLCD */
	PA6_AIN_SLCDC_DAT0,
	PA7_AIN_SLCDC_DAT1,
	PA8_AIN_SLCDC_DAT2,
	PA9_AIN_SLCDC_DAT3,
	PA10_AIN_SLCDC_DAT4,
	PA11_AIN_SLCDC_DAT5,
	PA12_AIN_SLCDC_DAT6,
	PA13_AIN_SLCDC_DAT7,
	PA25_AIN_SLCDC_CLS, /* D/C */
	PA26_AIN_SLCDC_CS,
	PA27_AIN_SLCDC_CLK, /* E/RD */
	SLCDC_RESET | GPIO_GPIO | GPIO_OUT,
	SLCDC_BL_POWER | GPIO_GPIO | GPIO_OUT,
	SLCDC_RW | GPIO_GPIO | GPIO_OUT, /* only for manual reading operation */
	/* MXT */
	MXT_KEY | GPIO_GPIO | GPIO_IN, /* Key */
	/* SSI4 */
	PC16_PF_SSI4_FS,
	PC17_PF_SSI4_RXD,
	PC18_PF_SSI4_TXD,
	PC19_PF_SSI4_CLK,
	/* Flash Led */
	FLASH_ENABLE | GPIO_GPIO | GPIO_OUT,
	THT_ENABLE | GPIO_GPIO | GPIO_OUT,
	HP_ENABLE | GPIO_GPIO | GPIO_OUT,
	HEATING_ENABLE | GPIO_GPIO | GPIO_OUT,
	BTNLIGHT_ENABLE | GPIO_GPIO | GPIO_OUT,
	/* GPIO KEY */
	GPIO_KEY1 | GPIO_GPIO | GPIO_IN,
	GPIO_KEY2 | GPIO_GPIO | GPIO_IN,
	GPIO_KEY3 | GPIO_GPIO | GPIO_IN,
};

static void __init imx27gc_init(void)
{
     mxc_gpio_setup_multiple_pins(imx27gc_pins, ARRAY_SIZE(imx27gc_pins),
		"imx27gc");
     ...
     imx27gc_i2c0_devices[0].irq = gpio_to_irq(MXT_KEY);
     i2c_register_board_info(0, imx27gc_i2c0_devices,
         ARRAY_SIZE(imx27gc_i2c0_devices));
         imx27_add_imx_i2c(0, &imx27gc_i2c0_data);
     ....
}
8---------------------------------------------------------
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Re: Information about Atmel MXT224

[Peter Meerwald]

> I have tried atmel_mxt_ts driver (original driver from kernel 3.6.0 and 
> driver from linux-next/master branch copied to kernel 3.6.0) on i.MX27 
> board. The capacitive glass used is a "GE Touch" 
> SMT-F-057G007-B011-4:3-NP. It has 16 pads in X and 14 pads in Y. It is 
> correctly detected (with one warning/error).

> Does someone has some informations or the protocol guide, please ?

you need to request them from the distributor I guess, they docs are 
pretty good

> /* TSP */
> static struct mxt_platform_data mxt_platform_data = {
> 	.x_line			= 18,
> 	.y_line			= 11,
> 	.x_size			= 480,

shouldn't this be 16/14?

> 	.y_size			= 640,
> 	.blen			= 0x1,
> 	.threshold		= 0x28,
> 	.voltage		= 2800000,		/* 2.8V */
> 	.orient			= MXT_DIAGONAL_COUNTER,
> 	.irqflags		= IRQF_TRIGGER_FALLING,
> };

> atmel_mxt_ts 0-004b: No cfg data defined, skipping reg init
> atmel_mxt_ts 0-004b: Invalid object type

something goes wrong in the initialization; the object table of the 
chip doesn't match the register data fed in -- the mxt224 can be a bitch 
and play dead

regards, p.

-- 

Peter Meerwald
+43-664-2444418 (mobile)

Re: Information about Atmel MXT224

[Gaëtan Carlier]

On 01/08/2014 12:42 PM, Peter Meerwald wrote:

> you need to request them from the distributor I guess, they docs are
> pretty good

I am in Belgium and we deal with Gleichmann & Co. Electronics in Germany 
to have their devkit (SMT-C-T10). I have signed a NDA with them to have 
MXT224 protocol guide but they never send me Protocol Guide.
I will try another distributor.

> shouldn't this be 16/14?
You are right, I already try this and test it again but this does not 
change anything.

> something goes wrong in the initialization; the object table of the
> chip doesn't match the register data fed in -- the mxt224 can be a bitch
> and play dead

So what can I do ? Maybe a problem with the embedded firmware that need 
an update (atmel_mxt_ts 0-004b: Family ID: 129 Variant ID: 1 
Major.Minor.Build: 2.0.AB)

When I do cat /proc/interrupts and I short-circuit /CHG to ground, 
number increases so low-level handling of interrupt is working.

Thanks,
Gaëtan Carlier.

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Re: Information about Atmel MXT224

[Peter Meerwald]

Hello,

> I am in Belgium and we deal with Gleichmann & Co. Electronics in Germany to
> have their devkit (SMT-C-T10). I have signed a NDA with them to have MXT224
> protocol guide but they never send me Protocol Guide.
> I will try another distributor.

just ask harder; I got it from them
 
> > something goes wrong in the initialization; the object table of the
> > chip doesn't match the register data fed in -- the mxt224 can be a bitch
> > and play dead
 
> So what can I do ? Maybe a problem with the embedded firmware that need an
> update (atmel_mxt_ts 0-004b: Family ID: 129 Variant ID: 1 Major.Minor.Build:
> 2.0.AB)

you need to understand the object table and see what object leads to the 
invalid object message; there is some mismatch between the driver and the 
chip

> When I do cat /proc/interrupts and I short-circuit /CHG to ground, number
> increases so low-level handling of interrupt is working.

if I remember correctly, the mxt224 does periodic interrupts (200ms?) 
when something is wrong with the config

regards, p.

-- 

Peter Meerwald
+43-664-2444418 (mobile)

Re: Information about Atmel MXT224

[Gaëtan Carlier]

Hello,
> just ask harder; I got it from them
I am going to ask to another dealer.

> you need to understand the object table and see what object leads to the
> invalid object message; there is some mismatch between the driver and the
> chip
But you have to admit that without Protocol Guide, it is a little bit 
harder ;-)

> if I remember correctly, the mxt224 does periodic interrupts (200ms?)
> when something is wrong with the config
That's explain why I previously saw Interrupts running free (100ms or 
200ms).

Thank you,
Gaëtan Carlier
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