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 memory_accessor *mem_acc, void *context) 32 { 33 char *mac_addr = davinci_soc_info.emac_pdata->mac_addr; 34 off_t offset = (off_t)context; 35 36 /* Read MAC addr from EEPROM */ 37 if (mem_acc->read(mem_acc, mac_addr, offset, ETH_ALEN) == ETH_ALEN) 38 pr_info("Read MAC addr from EEPROM: %pM\n", mac_addr); 39 } 40 41 static int __init davinci_init_id(struct davinci_soc_info *soc_info) 42 { 43 int i; 44 struct davinci_id *dip; 45 u8 variant; 46 u16 part_no; 47 void __iomem *base; 48 49 base = ioremap(soc_info->jtag_id_reg, SZ_4K); 50 if (!base) { 51 pr_err("Unable to map JTAG ID register\n"); 52 return -ENOMEM; 53 } 54 55 soc_info->jtag_id = __raw_readl(base); 56 iounmap(base); 57 58 variant = (soc_info->jtag_id & 0xf0000000) >> 28; 59 part_no = (soc_info->jtag_id & 0x0ffff000) >> 12; 60 61 for (i = 0, dip = soc_info->ids; i < soc_info->ids_num; 62 i++, dip++) 63 /* Don't care about the manufacturer right now */ 64 if ((dip->part_no == part_no) && (dip->variant == variant)) { 65 soc_info->cpu_id = dip->cpu_id; 66 pr_info("DaVinci %s variant 0x%x\n", dip->name, 67 dip->variant); 68 return 0; 69 } 70 71 pr_err("Unknown DaVinci JTAG ID 0x%x\n", soc_info->jtag_id); 72 return -EINVAL; 73 } 74 75 void __init davinci_common_init(struct davinci_soc_info *soc_info) 76 { 77 int ret; 78 79 if (!soc_info) { 80 ret = -EINVAL; 81 goto err; 82 } 83 84 memcpy(&davinci_soc_info, soc_info, sizeof(struct davinci_soc_info)); 85 86 if (davinci_soc_info.io_desc && (davinci_soc_info.io_desc_num > 0)) 87 iotable_init(davinci_soc_info.io_desc, 88 davinci_soc_info.io_desc_num); 89 90 init_consistent_dma_size(14 << 20); 91 92 /* 93 * Normally devicemaps_init() would flush caches and tlb after 94 * mdesc->map_io(), but we must also do it here because of the CPU 95 * revision check below. 96 */ 97 local_flush_tlb_all(); 98 flush_cache_all(); 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; 116 117 err: 118 panic("davinci_common_init: SoC Initialization failed\n"); 119 } 120 121 void __init davinci_init_late(void) 122 { 123 davinci_cpufreq_init(); 124 davinci_pm_init(); 125 davinci_clk_disable_unused(); 126 } 127