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 24 struct davinci_soc_info davinci_soc_info; 25 EXPORT_SYMBOL(davinci_soc_info); 26 27 void __iomem *davinci_intc_base; 28 int davinci_intc_type; 29 30 void 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 40 static struct davinci_id * __init davinci_get_id(u32 jtag_id) 41 { 42 int i; 43 struct davinci_id *dip; 44 u8 variant = (jtag_id & 0xf0000000) >> 28; 45 u16 part_no = (jtag_id & 0x0ffff000) >> 12; 46 47 for (i = 0, dip = davinci_soc_info.ids; i < davinci_soc_info.ids_num; 48 i++, dip++) 49 /* Don't care about the manufacturer right now */ 50 if ((dip->part_no == part_no) && (dip->variant == variant)) 51 return dip; 52 53 return NULL; 54 } 55 56 void __init davinci_common_init(struct davinci_soc_info *soc_info) 57 { 58 int ret; 59 struct davinci_id *dip; 60 61 if (!soc_info) { 62 ret = -EINVAL; 63 goto err; 64 } 65 66 memcpy(&davinci_soc_info, soc_info, sizeof(struct davinci_soc_info)); 67 68 if (davinci_soc_info.io_desc && (davinci_soc_info.io_desc_num > 0)) 69 iotable_init(davinci_soc_info.io_desc, 70 davinci_soc_info.io_desc_num); 71 72 /* 73 * Normally devicemaps_init() would flush caches and tlb after 74 * mdesc->map_io(), but we must also do it here because of the CPU 75 * revision check below. 76 */ 77 local_flush_tlb_all(); 78 flush_cache_all(); 79 80 /* 81 * We want to check CPU revision early for cpu_is_xxxx() macros. 82 * IO space mapping must be initialized before we can do that. 83 */ 84 davinci_soc_info.jtag_id = __raw_readl(davinci_soc_info.jtag_id_base); 85 86 dip = davinci_get_id(davinci_soc_info.jtag_id); 87 if (!dip) { 88 ret = -EINVAL; 89 pr_err("Unknown DaVinci JTAG ID 0x%x\n", 90 davinci_soc_info.jtag_id); 91 goto err; 92 } 93 94 davinci_soc_info.cpu_id = dip->cpu_id; 95 pr_info("DaVinci %s variant 0x%x\n", dip->name, dip->variant); 96 97 if (davinci_soc_info.cpu_clks) { 98 ret = davinci_clk_init(davinci_soc_info.cpu_clks); 99 100 if (ret != 0) 101 goto err; 102 } 103 104 davinci_intc_base = davinci_soc_info.intc_base; 105 davinci_intc_type = davinci_soc_info.intc_type; 106 return; 107 108 err: 109 panic("davinci_common_init: SoC Initialization failed\n"); 110 } 111