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Commit f1dd361b authored by Arnaud Patard's avatar Arnaud Patard Committed by Sascha Hauer
Browse files

efikamx: read board id 



read board id value from the GPIO3_16/17/11

Signed-off-by: default avatarArnaud Patard <arnaud.patard@rtp-net.org>
Signed-off-by: default avatarSascha Hauer <s.hauer@pengutronix.de>
parent bd02a9e5

arch/arm/mach-mx5/board-mx51_efikamx.c

+65 −0
Original line number Diff line number Diff line
@@ -39,12 +39,25 @@ 


#define	MX51_USB_PLL_DIV_24_MHZ	0x01



#define EFIKAMX_PCBID0		(2*32 + 16)

#define EFIKAMX_PCBID1		(2*32 + 17)

#define EFIKAMX_PCBID2		(2*32 + 11)



/* the pci ids pin have pull up. they're driven low according to board id */

#define MX51_PAD_PCBID0	IOMUX_PAD(0x518, 0x130, 3, 0x0,   0, PAD_CTL_PUS_100K_UP)

#define MX51_PAD_PCBID1	IOMUX_PAD(0x51C, 0x134, 3, 0x0,   0, PAD_CTL_PUS_100K_UP)

#define MX51_PAD_PCBID2	IOMUX_PAD(0x504, 0x128, 3, 0x0,   0, PAD_CTL_PUS_100K_UP)



static iomux_v3_cfg_t mx51efikamx_pads[] = {

	/* UART1 */

	MX51_PAD_UART1_RXD__UART1_RXD,

	MX51_PAD_UART1_TXD__UART1_TXD,

	MX51_PAD_UART1_RTS__UART1_RTS,

	MX51_PAD_UART1_CTS__UART1_CTS,

	/* board id */

	MX51_PAD_PCBID0,

	MX51_PAD_PCBID1,

	MX51_PAD_PCBID2,

};



/* Serial ports */
@@ -92,10 +105,62 @@ static struct mxc_usbh_platform_data dr_utmi_config = { 
	.flags  = MXC_EHCI_INTERNAL_PHY,

};



/*   PCBID2  PCBID1 PCBID0  STATE

	1       1      1    ER1:rev1.1

	1       1      0    ER2:rev1.2

	1       0      1    ER3:rev1.3

	1       0      0    ER4:rev1.4

*/

static void __init mx51_efikamx_board_id(void)

{

	int id;



	/* things are taking time to settle */

	msleep(150);



	gpio_request(EFIKAMX_PCBID0, "pcbid0");

	gpio_direction_input(EFIKAMX_PCBID0);

	gpio_request(EFIKAMX_PCBID1, "pcbid1");

	gpio_direction_input(EFIKAMX_PCBID1);

	gpio_request(EFIKAMX_PCBID2, "pcbid2");

	gpio_direction_input(EFIKAMX_PCBID2);



	id = gpio_get_value(EFIKAMX_PCBID0);

	id |= gpio_get_value(EFIKAMX_PCBID1) << 1;

	id |= gpio_get_value(EFIKAMX_PCBID2) << 2;



	switch (id) {

	case 7:

		system_rev = 0x11;

		break;

	case 6:

		system_rev = 0x12;

		break;

	case 5:

		system_rev = 0x13;

		break;

	case 4:

		system_rev = 0x14;

		break;

	default:

		system_rev = 0x10;

		break;

	}



	if ((system_rev == 0x10)

		|| (system_rev == 0x12)

		|| (system_rev == 0x14)) {

		printk(KERN_WARNING

			"EfikaMX: Unsupported board revision 1.%u!\n",

			system_rev & 0xf);

	}

}



static void __init mxc_board_init(void)

{

	mxc_iomux_v3_setup_multiple_pads(mx51efikamx_pads,

					ARRAY_SIZE(mx51efikamx_pads));

	mx51_efikamx_board_id();

	mxc_register_device(&mxc_usbdr_host_device, &dr_utmi_config);

	mxc_init_imx_uart();

}