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 CC: Remy Bohmer <linux@bohmer.net> Signed-off-by: Vaibhav Hiremath <hvaibhav@ti.com> Signed-off-by: Sanjeev Premi <premi@ti.com> Signed-off-by: Ajay Kumar Gupta <ajay.gupta@ti.com> Acked-by: Sandeep Paulraj <s-paulraj@ti.com>
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@ -37,6 +37,33 @@
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#include <asm/mach-types.h>
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#include "evm.h"
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static u8 omap3_evm_version;
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u8 get_omap3_evm_rev(void)
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{
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return omap3_evm_version;
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}
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static void omap3_evm_get_revision(void)
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{
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unsigned int smsc_id;
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/* Ethernet PHY ID is stored at ID_REV register */
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smsc_id = readl(CONFIG_SMC911X_BASE + 0x50) & 0xFFFF0000;
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printf("Read back SMSC id 0x%x\n", smsc_id);
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switch (smsc_id) {
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/* SMSC9115 chipset */
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case 0x01150000:
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omap3_evm_version = OMAP3EVM_BOARD_GEN_1;
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break;
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/* SMSC 9220 chipset */
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case 0x92200000:
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default:
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omap3_evm_version = OMAP3EVM_BOARD_GEN_2;
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}
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}
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/*
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* Routine: board_init
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* Description: Early hardware init.
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@ -121,6 +148,9 @@ static void setup_net_chip(void)
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writel(GPIO0, &gpio3_base->cleardataout);
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udelay(1);
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writel(GPIO0, &gpio3_base->setdataout);
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/* determine omap3evm revision */
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omap3_evm_get_revision();
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}
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int board_eth_init(bd_t *bis)
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@ -33,6 +33,20 @@ const omap3_sysinfo sysinfo = {
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#endif
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};
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/*
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* OMAP35x EVM revision
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* Run time detection of EVM revision is done by reading Ethernet
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* PHY ID -
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* GEN_1 = 0x01150000
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* GEN_2 = 0x92200000
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*/
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enum {
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OMAP3EVM_BOARD_GEN_1 = 0, /* EVM Rev between A - D */
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OMAP3EVM_BOARD_GEN_2, /* EVM Rev >= Rev E */
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};
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u8 get_omap3_evm_rev(void);
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static void setup_net_chip(void);
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/*
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