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efikamx: read board id 

read board id value from the GPIO3_16/17/11

Signed-off-by: Arnaud Patard <arnaud.patard@rtp-net.org>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Arnaud Patard (Rtp) 2010-10-27 14:40:46 +02:00 committed by Sascha Hauer
parent bd02a9e5ee
commit f1dd361b67
1 changed files with 65 additions and 0 deletions
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65
arch/arm/mach-mx5/board-mx51_efikamx.c
View File

@ -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();
}