diff options
| author | Arnaud Patard (Rtp) <arnaud.patard@rtp-net.org> | 2010-10-27 14:40:46 +0200 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2010-11-24 09:57:06 +0100 |
| commit | f1dd361b679977d449b7d10ddc9b5fcdfa8c0ca9 (patch) | |
| tree | d5d7905e95c5015d95b30ef82b8d2173dfc95ee9 /arch/arm | |
| parent | bd02a9e5eee6335f23f1fff52a1e5c8e1783c49e (diff) | |
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>
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/mach-mx5/board-mx51_efikamx.c | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/arch/arm/mach-mx5/board-mx51_efikamx.c b/arch/arm/mach-mx5/board-mx51_efikamx.c index 1b1d4f14d48..057f9f43735 100644 --- a/arch/arm/mach-mx5/board-mx51_efikamx.c +++ b/arch/arm/mach-mx5/board-mx51_efikamx.c @@ -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(); } |