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 #include <linux/dma-mapping.h> 16 17 #include <asm/tlb.h> 18 #include <asm/mach/map.h> 19 20 #include <mach/common.h> 21 #include <mach/cputype.h> 22 23 struct davinci_soc_info davinci_soc_info; 24 EXPORT_SYMBOL(davinci_soc_info); 25 26 void __iomem *davinci_intc_base; 27 int davinci_intc_type; 28 29 void davinci_get_mac_addr(struct nvmem_device *nvmem, void *context) 30 { 31 char *mac_addr = davinci_soc_info.emac_pdata->mac_addr; 32 off_t offset = (off_t)context; 33 34 if (!IS_BUILTIN(CONFIG_NVMEM)) { 35 pr_warn("Cannot read MAC addr from EEPROM without CONFIG_NVMEM\n"); 36 return; 37 } 38 39 /* Read MAC addr from EEPROM */ 40 if (nvmem_device_read(nvmem, offset, ETH_ALEN, mac_addr) == ETH_ALEN) 41 pr_info("Read MAC addr from EEPROM: %pM\n", mac_addr); 42 } 43 44 static int __init davinci_init_id(struct davinci_soc_info *soc_info) 45 { 46 int i; 47 struct davinci_id *dip; 48 u8 variant; 49 u16 part_no; 50 void __iomem *base; 51 52 base = ioremap(soc_info->jtag_id_reg, SZ_4K); 53 if (!base) { 54 pr_err("Unable to map JTAG ID register\n"); 55 return -ENOMEM; 56 } 57 58 soc_info->jtag_id = __raw_readl(base); 59 iounmap(base); 60 61 variant = (soc_info->jtag_id & 0xf0000000) >> 28; 62 part_no = (soc_info->jtag_id & 0x0ffff000) >> 12; 63 64 for (i = 0, dip = soc_info->ids; i < soc_info->ids_num; 65 i++, dip++) 66 /* Don't care about the manufacturer right now */ 67 if ((dip->part_no == part_no) && (dip->variant == variant)) { 68 soc_info->cpu_id = dip->cpu_id; 69 pr_info("DaVinci %s variant 0x%x\n", dip->name, 70 dip->variant); 71 return 0; 72 } 73 74 pr_err("Unknown DaVinci JTAG ID 0x%x\n", soc_info->jtag_id); 75 return -EINVAL; 76 } 77 78 void __init davinci_common_init(const struct davinci_soc_info *soc_info) 79 { 80 int ret; 81 82 if (!soc_info) { 83 ret = -EINVAL; 84 goto err; 85 } 86 87 memcpy(&davinci_soc_info, soc_info, sizeof(struct davinci_soc_info)); 88 89 if (davinci_soc_info.io_desc && (davinci_soc_info.io_desc_num > 0)) 90 iotable_init(davinci_soc_info.io_desc, 91 davinci_soc_info.io_desc_num); 92 93 /* 94 * Normally devicemaps_init() would flush caches and tlb after 95 * mdesc->map_io(), but we must also do it here because of the CPU 96 * revision check below. 97 */ 98 local_flush_tlb_all(); 99 flush_cache_all(); 100 101 /* 102 * We want to check CPU revision early for cpu_is_xxxx() macros. 103 * IO space mapping must be initialized before we can do that. 104 */ 105 ret = davinci_init_id(&davinci_soc_info); 106 if (ret < 0) 107 goto err; 108 109 110 return; 111 112 err: 113 panic("davinci_common_init: SoC Initialization failed\n"); 114 } 115 116 void __init davinci_init_late(void) 117 { 118 davinci_cpufreq_init(); 119 } 120