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 #include "clock.h" 24 25 struct davinci_soc_info davinci_soc_info; 26 EXPORT_SYMBOL(davinci_soc_info); 27 28 void __iomem *davinci_intc_base; 29 int davinci_intc_type; 30 31 void davinci_get_mac_addr(struct nvmem_device *nvmem, void *context) 32 { 33 char *mac_addr = davinci_soc_info.emac_pdata->mac_addr; 34 off_t offset = (off_t)context; 35 36 if (!IS_BUILTIN(CONFIG_NVMEM)) { 37 pr_warn("Cannot read MAC addr from EEPROM without CONFIG_NVMEM\n"); 38 return; 39 } 40 41 /* Read MAC addr from EEPROM */ 42 if (nvmem_device_read(nvmem, offset, ETH_ALEN, mac_addr) == ETH_ALEN) 43 pr_info("Read MAC addr from EEPROM: %pM\n", mac_addr); 44 } 45 46 static int __init davinci_init_id(struct davinci_soc_info *soc_info) 47 { 48 int i; 49 struct davinci_id *dip; 50 u8 variant; 51 u16 part_no; 52 void __iomem *base; 53 54 base = ioremap(soc_info->jtag_id_reg, SZ_4K); 55 if (!base) { 56 pr_err("Unable to map JTAG ID register\n"); 57 return -ENOMEM; 58 } 59 60 soc_info->jtag_id = __raw_readl(base); 61 iounmap(base); 62 63 variant = (soc_info->jtag_id & 0xf0000000) >> 28; 64 part_no = (soc_info->jtag_id & 0x0ffff000) >> 12; 65 66 for (i = 0, dip = soc_info->ids; i < soc_info->ids_num; 67 i++, dip++) 68 /* Don't care about the manufacturer right now */ 69 if ((dip->part_no == part_no) && (dip->variant == variant)) { 70 soc_info->cpu_id = dip->cpu_id; 71 pr_info("DaVinci %s variant 0x%x\n", dip->name, 72 dip->variant); 73 return 0; 74 } 75 76 pr_err("Unknown DaVinci JTAG ID 0x%x\n", soc_info->jtag_id); 77 return -EINVAL; 78 } 79 80 void __init davinci_common_init(const struct davinci_soc_info *soc_info) 81 { 82 int ret; 83 84 if (!soc_info) { 85 ret = -EINVAL; 86 goto err; 87 } 88 89 memcpy(&davinci_soc_info, soc_info, sizeof(struct davinci_soc_info)); 90 91 if (davinci_soc_info.io_desc && (davinci_soc_info.io_desc_num > 0)) 92 iotable_init(davinci_soc_info.io_desc, 93 davinci_soc_info.io_desc_num); 94 95 /* 96 * Normally devicemaps_init() would flush caches and tlb after 97 * mdesc->map_io(), but we must also do it here because of the CPU 98 * revision check below. 99 */ 100 local_flush_tlb_all(); 101 flush_cache_all(); 102 103 /* 104 * We want to check CPU revision early for cpu_is_xxxx() macros. 105 * IO space mapping must be initialized before we can do that. 106 */ 107 ret = davinci_init_id(&davinci_soc_info); 108 if (ret < 0) 109 goto err; 110 111 112 return; 113 114 err: 115 panic("davinci_common_init: SoC Initialization failed\n"); 116 } 117 118 void __init davinci_init_late(void) 119 { 120 davinci_cpufreq_init(); 121 davinci_clk_disable_unused(); 122 } 123