From db408023b85644e1bee80d4004aff1ff188032e9 Mon Sep 17 00:00:00 2001 From: Ajay Kumar Gupta Date: Sun, 22 Nov 2009 10:11:27 -0800 Subject: [PATCH] omap3evm: Add board revision function Added function to differentiate between the OMAP3EVM revisions. The chip-id of the ethernet PHY is being used for this purpose. Rev A to D : 0x01150000 Rev >= E : 0x92200000 Signed-off-by: Vaibhav Hiremath Signed-off-by: Ajay Kumar Gupta Signed-off-by: Sanjeev Premi Signed-off-by: Tony Lindgren --- arch/arm/mach-omap2/board-omap3evm.c | 35 +++++++++++++++++++++++++++++++++ arch/arm/plat-omap/include/plat/board.h | 18 +++++++++++++++++ 2 files changed, 53 insertions(+) diff --git a/arch/arm/mach-omap2/board-omap3evm.c b/arch/arm/mach-omap2/board-omap3evm.c index 1edf06a..149d45c 100644 --- a/arch/arm/mach-omap2/board-omap3evm.c +++ b/arch/arm/mach-omap2/board-omap3evm.c @@ -46,9 +46,42 @@ #define OMAP3EVM_ETHR_START 0x2c000000 #define OMAP3EVM_ETHR_SIZE 1024 +#define OMAP3EVM_ETHR_ID_REV 0x50 #define OMAP3EVM_ETHR_GPIO_IRQ 176 #define OMAP3EVM_SMC911X_CS 5 +static u8 omap3_evm_version; + +u8 get_omap3_evm_rev(void) +{ + return omap3_evm_version; +} +EXPORT_SYMBOL(get_omap3_evm_rev); + +static void __init omap3_evm_get_revision(void) +{ + void __iomem *ioaddr; + unsigned int smsc_id; + + /* Ethernet PHY ID is stored at ID_REV register */ + ioaddr = ioremap_nocache(OMAP3EVM_ETHR_START, SZ_1K); + if (!ioaddr) + return; + smsc_id = readl(ioaddr + OMAP3EVM_ETHR_ID_REV) & 0xFFFF0000; + iounmap(ioaddr); + + switch (smsc_id) { + /*SMSC9115 chipset*/ + case 0x01150000: + omap3_evm_version = OMAP3EVM_BOARD_GEN_1; + break; + /*SMSC 9220 chipset*/ + case 0x92200000: + default: + omap3_evm_version = OMAP3EVM_BOARD_GEN_2; + } +} + static struct resource omap3evm_smc911x_resources[] = { [0] = { .start = OMAP3EVM_ETHR_START, @@ -321,6 +354,8 @@ static struct ehci_hcd_omap_platform_data ehci_pdata __initconst = { static void __init omap3_evm_init(void) { + omap3_evm_get_revision(); + omap3_evm_i2c_init(); platform_add_devices(omap3_evm_devices, ARRAY_SIZE(omap3_evm_devices)); diff --git a/arch/arm/plat-omap/include/plat/board.h b/arch/arm/plat-omap/include/plat/board.h index c4fc69f..abb17b6 100644 --- a/arch/arm/plat-omap/include/plat/board.h +++ b/arch/arm/plat-omap/include/plat/board.h @@ -14,6 +14,18 @@ #include +/* + * OMAP35x EVM revision + * Run time detection of EVM revision is done by reading Ethernet + * PHY ID - + * GEN_1 = 0x01150000 + * GEN_2 = 0x92200000 + */ +enum { + OMAP3EVM_BOARD_GEN_1 = 0, /* EVM Rev between A - D */ + OMAP3EVM_BOARD_GEN_2, /* EVM Rev >= Rev E */ +}; + /* Different peripheral ids */ #define OMAP_TAG_CLOCK 0x4f01 #define OMAP_TAG_LCD 0x4f05 @@ -157,4 +169,10 @@ extern int omap_board_config_size; /* for TI reference platforms sharing the same debug card */ extern int debug_card_init(u32 addr, unsigned gpio); +/* OMAP3EVM revision */ +#if defined(CONFIG_MACH_OMAP3EVM) +u8 get_omap3_evm_rev(void); +#else +#define get_omap3_evm_rev() (-EINVAL) +#endif #endif -- 2.7.4