1 /* 2 * This file is part of wl12xx 3 * 4 * Copyright (C) 2008 Nokia Corporation 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public License 8 * version 2 as published by the Free Software Foundation. 9 * 10 * This program is distributed in the hope that it will be useful, but 11 * WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 * General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program; if not, write to the Free Software 17 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 18 * 02110-1301 USA 19 * 20 */ 21 22 #include "wl1251.h" 23 #include "reg.h" 24 #include "io.h" 25 26 /* FIXME: this is static data nowadays and the table can be removed */ 27 static enum wl12xx_acx_int_reg wl1251_io_reg_table[ACX_REG_TABLE_LEN] = { 28 [ACX_REG_INTERRUPT_TRIG] = (REGISTERS_BASE + 0x0474), 29 [ACX_REG_INTERRUPT_TRIG_H] = (REGISTERS_BASE + 0x0478), 30 [ACX_REG_INTERRUPT_MASK] = (REGISTERS_BASE + 0x0494), 31 [ACX_REG_HINT_MASK_SET] = (REGISTERS_BASE + 0x0498), 32 [ACX_REG_HINT_MASK_CLR] = (REGISTERS_BASE + 0x049C), 33 [ACX_REG_INTERRUPT_NO_CLEAR] = (REGISTERS_BASE + 0x04B0), 34 [ACX_REG_INTERRUPT_CLEAR] = (REGISTERS_BASE + 0x04A4), 35 [ACX_REG_INTERRUPT_ACK] = (REGISTERS_BASE + 0x04A8), 36 [ACX_REG_SLV_SOFT_RESET] = (REGISTERS_BASE + 0x0000), 37 [ACX_REG_EE_START] = (REGISTERS_BASE + 0x080C), 38 [ACX_REG_ECPU_CONTROL] = (REGISTERS_BASE + 0x0804) 39 }; 40 41 static int wl1251_translate_reg_addr(struct wl1251 *wl, int addr) 42 { 43 /* If the address is lower than REGISTERS_BASE, it means that this is 44 * a chip-specific register address, so look it up in the registers 45 * table */ 46 if (addr < REGISTERS_BASE) { 47 /* Make sure we don't go over the table */ 48 if (addr >= ACX_REG_TABLE_LEN) { 49 wl1251_error("address out of range (%d)", addr); 50 return -EINVAL; 51 } 52 addr = wl1251_io_reg_table[addr]; 53 } 54 55 return addr - wl->physical_reg_addr + wl->virtual_reg_addr; 56 } 57 58 static int wl1251_translate_mem_addr(struct wl1251 *wl, int addr) 59 { 60 return addr - wl->physical_mem_addr + wl->virtual_mem_addr; 61 } 62 63 void wl1251_mem_read(struct wl1251 *wl, int addr, void *buf, size_t len) 64 { 65 int physical; 66 67 physical = wl1251_translate_mem_addr(wl, addr); 68 69 wl->if_ops->read(wl, physical, buf, len); 70 } 71 72 void wl1251_mem_write(struct wl1251 *wl, int addr, void *buf, size_t len) 73 { 74 int physical; 75 76 physical = wl1251_translate_mem_addr(wl, addr); 77 78 wl->if_ops->write(wl, physical, buf, len); 79 } 80 81 u32 wl1251_mem_read32(struct wl1251 *wl, int addr) 82 { 83 return wl1251_read32(wl, wl1251_translate_mem_addr(wl, addr)); 84 } 85 86 void wl1251_mem_write32(struct wl1251 *wl, int addr, u32 val) 87 { 88 wl1251_write32(wl, wl1251_translate_mem_addr(wl, addr), val); 89 } 90 91 u32 wl1251_reg_read32(struct wl1251 *wl, int addr) 92 { 93 return wl1251_read32(wl, wl1251_translate_reg_addr(wl, addr)); 94 } 95 96 void wl1251_reg_write32(struct wl1251 *wl, int addr, u32 val) 97 { 98 wl1251_write32(wl, wl1251_translate_reg_addr(wl, addr), val); 99 } 100 101 /* Set the partitions to access the chip addresses. 102 * 103 * There are two VIRTUAL partitions (the memory partition and the 104 * registers partition), which are mapped to two different areas of the 105 * PHYSICAL (hardware) memory. This function also makes other checks to 106 * ensure that the partitions are not overlapping. In the diagram below, the 107 * memory partition comes before the register partition, but the opposite is 108 * also supported. 109 * 110 * PHYSICAL address 111 * space 112 * 113 * | | 114 * ...+----+--> mem_start 115 * VIRTUAL address ... | | 116 * space ... | | [PART_0] 117 * ... | | 118 * 0x00000000 <--+----+... ...+----+--> mem_start + mem_size 119 * | | ... | | 120 * |MEM | ... | | 121 * | | ... | | 122 * part_size <--+----+... | | {unused area) 123 * | | ... | | 124 * |REG | ... | | 125 * part_size | | ... | | 126 * + <--+----+... ...+----+--> reg_start 127 * reg_size ... | | 128 * ... | | [PART_1] 129 * ... | | 130 * ...+----+--> reg_start + reg_size 131 * | | 132 * 133 */ 134 void wl1251_set_partition(struct wl1251 *wl, 135 u32 mem_start, u32 mem_size, 136 u32 reg_start, u32 reg_size) 137 { 138 struct wl1251_partition partition[2]; 139 140 wl1251_debug(DEBUG_SPI, "mem_start %08X mem_size %08X", 141 mem_start, mem_size); 142 wl1251_debug(DEBUG_SPI, "reg_start %08X reg_size %08X", 143 reg_start, reg_size); 144 145 /* Make sure that the two partitions together don't exceed the 146 * address range */ 147 if ((mem_size + reg_size) > HW_ACCESS_MEMORY_MAX_RANGE) { 148 wl1251_debug(DEBUG_SPI, "Total size exceeds maximum virtual" 149 " address range. Truncating partition[0]."); 150 mem_size = HW_ACCESS_MEMORY_MAX_RANGE - reg_size; 151 wl1251_debug(DEBUG_SPI, "mem_start %08X mem_size %08X", 152 mem_start, mem_size); 153 wl1251_debug(DEBUG_SPI, "reg_start %08X reg_size %08X", 154 reg_start, reg_size); 155 } 156 157 if ((mem_start < reg_start) && 158 ((mem_start + mem_size) > reg_start)) { 159 /* Guarantee that the memory partition doesn't overlap the 160 * registers partition */ 161 wl1251_debug(DEBUG_SPI, "End of partition[0] is " 162 "overlapping partition[1]. Adjusted."); 163 mem_size = reg_start - mem_start; 164 wl1251_debug(DEBUG_SPI, "mem_start %08X mem_size %08X", 165 mem_start, mem_size); 166 wl1251_debug(DEBUG_SPI, "reg_start %08X reg_size %08X", 167 reg_start, reg_size); 168 } else if ((reg_start < mem_start) && 169 ((reg_start + reg_size) > mem_start)) { 170 /* Guarantee that the register partition doesn't overlap the 171 * memory partition */ 172 wl1251_debug(DEBUG_SPI, "End of partition[1] is" 173 " overlapping partition[0]. Adjusted."); 174 reg_size = mem_start - reg_start; 175 wl1251_debug(DEBUG_SPI, "mem_start %08X mem_size %08X", 176 mem_start, mem_size); 177 wl1251_debug(DEBUG_SPI, "reg_start %08X reg_size %08X", 178 reg_start, reg_size); 179 } 180 181 partition[0].start = mem_start; 182 partition[0].size = mem_size; 183 partition[1].start = reg_start; 184 partition[1].size = reg_size; 185 186 wl->physical_mem_addr = mem_start; 187 wl->physical_reg_addr = reg_start; 188 189 wl->virtual_mem_addr = 0; 190 wl->virtual_reg_addr = mem_size; 191 192 wl->if_ops->write(wl, HW_ACCESS_PART0_SIZE_ADDR, partition, 193 sizeof(partition)); 194 } 195