1/* 2 * Code commons to all DaVinci SoCs. 3 * 4 * Author: Mark A. Greer <mgreer@mvista.com> 5 * 6 * 2009 (c) MontaVista Software, Inc. This file is licensed under 7 * the terms of the GNU General Public License version 2. This program 8 * is licensed "as is" without any warranty of any kind, whether express 9 * or implied. 10 */ 11#include <linux/module.h> 12#include <linux/io.h> 13#include <linux/etherdevice.h> 14#include <linux/davinci_emac.h> 15 16#include <asm/tlb.h> 17#include <asm/mach/map.h> 18 19#include <mach/common.h> 20#include <mach/cputype.h> 21 22#include "clock.h" 23 24struct davinci_soc_info davinci_soc_info; 25EXPORT_SYMBOL(davinci_soc_info); 26 27void __iomem *davinci_intc_base; 28int davinci_intc_type; 29 30void davinci_get_mac_addr(struct memory_accessor *mem_acc, void *context) 31{ 32 char *mac_addr = davinci_soc_info.emac_pdata->mac_addr; 33 off_t offset = (off_t)context; 34 35 /* Read MAC addr from EEPROM */ 36 if (mem_acc->read(mem_acc, mac_addr, offset, ETH_ALEN) == ETH_ALEN) 37 pr_info("Read MAC addr from EEPROM: %pM\n", mac_addr); 38} 39 40static int __init davinci_init_id(struct davinci_soc_info *soc_info) 41{ 42 int i; 43 struct davinci_id *dip; 44 u8 variant; 45 u16 part_no; 46 void __iomem *base; 47 48 base = ioremap(soc_info->jtag_id_reg, SZ_4K); 49 if (!base) { 50 pr_err("Unable to map JTAG ID register\n"); 51 return -ENOMEM; 52 } 53 54 soc_info->jtag_id = __raw_readl(base); 55 iounmap(base); 56 57 variant = (soc_info->jtag_id & 0xf0000000) >> 28; 58 part_no = (soc_info->jtag_id & 0x0ffff000) >> 12; 59 60 for (i = 0, dip = soc_info->ids; i < soc_info->ids_num; 61 i++, dip++) 62 /* Don't care about the manufacturer right now */ 63 if ((dip->part_no == part_no) && (dip->variant == variant)) { 64 soc_info->cpu_id = dip->cpu_id; 65 pr_info("DaVinci %s variant 0x%x\n", dip->name, 66 dip->variant); 67 return 0; 68 } 69 70 pr_err("Unknown DaVinci JTAG ID 0x%x\n", soc_info->jtag_id); 71 return -EINVAL; 72} 73 74void __init davinci_common_init(struct davinci_soc_info *soc_info) 75{ 76 int ret; 77 78 if (!soc_info) { 79 ret = -EINVAL; 80 goto err; 81 } 82 83 memcpy(&davinci_soc_info, soc_info, sizeof(struct davinci_soc_info)); 84 85 if (davinci_soc_info.io_desc && (davinci_soc_info.io_desc_num > 0)) 86 iotable_init(davinci_soc_info.io_desc, 87 davinci_soc_info.io_desc_num); 88 89 /* 90 * Normally devicemaps_init() would flush caches and tlb after 91 * mdesc->map_io(), but we must also do it here because of the CPU 92 * revision check below. 93 */ 94 local_flush_tlb_all(); 95 flush_cache_all(); 96 97 if (!davinci_soc_info.reset) 98 davinci_soc_info.reset = davinci_watchdog_reset; 99 100 /* 101 * We want to check CPU revision early for cpu_is_xxxx() macros. 102 * IO space mapping must be initialized before we can do that. 103 */ 104 ret = davinci_init_id(&davinci_soc_info); 105 if (ret < 0) 106 goto err; 107 108 if (davinci_soc_info.cpu_clks) { 109 ret = davinci_clk_init(davinci_soc_info.cpu_clks); 110 111 if (ret != 0) 112 goto err; 113 } 114 115 return; 116 117err: 118 panic("davinci_common_init: SoC Initialization failed\n"); 119} 120