text: /*
   * This file is part of wl12xx
   *
   * Copyright (C) 2008 Nokia Corporation
   *
   * This program is free software; you can redistribute it and/or
   * modify it under the terms of the GNU General Public License
   * version 2 as published by the Free Software Foundation.
   *
   * This program is distributed in the hope that it will be useful, but
   * WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   * General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License
   * along with this program; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
   * 02110-1301 USA
   *
   */
  
  #include "wl1251.h"
  #include "reg.h"
  #include "io.h"
  
  /* FIXME: this is static data nowadays and the table can be removed */
  static enum wl12xx_acx_int_reg wl1251_io_reg_table[ACX_REG_TABLE_LEN] = {
  	[ACX_REG_INTERRUPT_TRIG]     = (REGISTERS_BASE + 0x0474),
  	[ACX_REG_INTERRUPT_TRIG_H]   = (REGISTERS_BASE + 0x0478),
  	[ACX_REG_INTERRUPT_MASK]     = (REGISTERS_BASE + 0x0494),
  	[ACX_REG_HINT_MASK_SET]      = (REGISTERS_BASE + 0x0498),
  	[ACX_REG_HINT_MASK_CLR]      = (REGISTERS_BASE + 0x049C),
  	[ACX_REG_INTERRUPT_NO_CLEAR] = (REGISTERS_BASE + 0x04B0),
  	[ACX_REG_INTERRUPT_CLEAR]    = (REGISTERS_BASE + 0x04A4),
  	[ACX_REG_INTERRUPT_ACK]      = (REGISTERS_BASE + 0x04A8),
  	[ACX_REG_SLV_SOFT_RESET]     = (REGISTERS_BASE + 0x0000),
  	[ACX_REG_EE_START]           = (REGISTERS_BASE + 0x080C),
  	[ACX_REG_ECPU_CONTROL]       = (REGISTERS_BASE + 0x0804)
  };
  
  static int wl1251_translate_reg_addr(struct wl1251 *wl, int addr)
  {
  	/* If the address is lower than REGISTERS_BASE, it means that this is
  	 * a chip-specific register address, so look it up in the registers
  	 * table */
  	if (addr < REGISTERS_BASE) {
  		/* Make sure we don't go over the table */
  		if (addr >= ACX_REG_TABLE_LEN) {
  			wl1251_error("address out of range (%d)", addr);
  			return -EINVAL;
  		}
  		addr = wl1251_io_reg_table[addr];
  	}
  
  	return addr - wl->physical_reg_addr + wl->virtual_reg_addr;
  }
  
  static int wl1251_translate_mem_addr(struct wl1251 *wl, int addr)
  {
  	return addr - wl->physical_mem_addr + wl->virtual_mem_addr;
  }
  
  void wl1251_mem_read(struct wl1251 *wl, int addr, void *buf, size_t len)
  {
  	int physical;
  
  	physical = wl1251_translate_mem_addr(wl, addr);
  
  	wl->if_ops->read(wl, physical, buf, len);
  }
  
  void wl1251_mem_write(struct wl1251 *wl, int addr, void *buf, size_t len)
  {
  	int physical;
  
  	physical = wl1251_translate_mem_addr(wl, addr);
  
  	wl->if_ops->write(wl, physical, buf, len);
  }
  
  u32 wl1251_mem_read32(struct wl1251 *wl, int addr)
  {
  	return wl1251_read32(wl, wl1251_translate_mem_addr(wl, addr));
  }
  
  void wl1251_mem_write32(struct wl1251 *wl, int addr, u32 val)
  {
  	wl1251_write32(wl, wl1251_translate_mem_addr(wl, addr), val);
  }
  
  u32 wl1251_reg_read32(struct wl1251 *wl, int addr)
  {
  	return wl1251_read32(wl, wl1251_translate_reg_addr(wl, addr));
  }
  
  void wl1251_reg_write32(struct wl1251 *wl, int addr, u32 val)
  {
  	wl1251_write32(wl, wl1251_translate_reg_addr(wl, addr), val);
  }
  
  /* Set the partitions to access the chip addresses.
   *
   * There are two VIRTUAL partitions (the memory partition and the
   * registers partition), which are mapped to two different areas of the
   * PHYSICAL (hardware) memory.  This function also makes other checks to
   * ensure that the partitions are not overlapping.  In the diagram below, the
   * memory partition comes before the register partition, but the opposite is
   * also supported.
   *
   *                               PHYSICAL address
   *                                     space
   *
   *                                    |    |
   *                                 ...+----+--> mem_start
   *          VIRTUAL address     ...   |    |
   *               space       ...      |    | [PART_0]
   *                        ...         |    |
   * 0x00000000 <--+----+...         ...+----+--> mem_start + mem_size
   *               |    |         ...   |    |
   *               |MEM |      ...      |    |
   *               |    |   ...         |    |
   *  part_size <--+----+...            |    | {unused area)
   *               |    |   ...         |    |
   *               |REG |      ...      |    |
   *  part_size    |    |         ...   |    |
   *      +     <--+----+...         ...+----+--> reg_start
   *  reg_size              ...         |    |
   *                           ...      |    | [PART_1]
   *                              ...   |    |
   *                                 ...+----+--> reg_start + reg_size
   *                                    |    |
   *
   */
  void wl1251_set_partition(struct wl1251 *wl,
  			  u32 mem_start, u32 mem_size,
  			  u32 reg_start, u32 reg_size)
  {
  	struct wl1251_partition partition[2];
  
  	wl1251_debug(DEBUG_SPI, "mem_start %08X mem_size %08X",
  		     mem_start, mem_size);
  	wl1251_debug(DEBUG_SPI, "reg_start %08X reg_size %08X",
  		     reg_start, reg_size);
  
  	/* Make sure that the two partitions together don't exceed the
  	 * address range */
  	if ((mem_size + reg_size) > HW_ACCESS_MEMORY_MAX_RANGE) {
  		wl1251_debug(DEBUG_SPI, "Total size exceeds maximum virtual"
  			     " address range.  Truncating partition[0].");
  		mem_size = HW_ACCESS_MEMORY_MAX_RANGE - reg_size;
  		wl1251_debug(DEBUG_SPI, "mem_start %08X mem_size %08X",
  			     mem_start, mem_size);
  		wl1251_debug(DEBUG_SPI, "reg_start %08X reg_size %08X",
  			     reg_start, reg_size);
  	}
  
  	if ((mem_start < reg_start) &&
  	    ((mem_start + mem_size) > reg_start)) {
  		/* Guarantee that the memory partition doesn't overlap the
  		 * registers partition */
  		wl1251_debug(DEBUG_SPI, "End of partition[0] is "
  			     "overlapping partition[1].  Adjusted.");
  		mem_size = reg_start - mem_start;
  		wl1251_debug(DEBUG_SPI, "mem_start %08X mem_size %08X",
  			     mem_start, mem_size);
  		wl1251_debug(DEBUG_SPI, "reg_start %08X reg_size %08X",
  			     reg_start, reg_size);
  	} else if ((reg_start < mem_start) &&
  		   ((reg_start + reg_size) > mem_start)) {
  		/* Guarantee that the register partition doesn't overlap the
  		 * memory partition */
  		wl1251_debug(DEBUG_SPI, "End of partition[1] is"
  			     " overlapping partition[0].  Adjusted.");
  		reg_size = mem_start - reg_start;
  		wl1251_debug(DEBUG_SPI, "mem_start %08X mem_size %08X",
  			     mem_start, mem_size);
  		wl1251_debug(DEBUG_SPI, "reg_start %08X reg_size %08X",
  			     reg_start, reg_size);
  	}
  
  	partition[0].start = mem_start;
  	partition[0].size  = mem_size;
  	partition[1].start = reg_start;
  	partition[1].size  = reg_size;
  
  	wl->physical_mem_addr = mem_start;
  	wl->physical_reg_addr = reg_start;
  
  	wl->virtual_mem_addr = 0;
  	wl->virtual_reg_addr = mem_size;
  
  	wl->if_ops->write(wl, HW_ACCESS_PART0_SIZE_ADDR, partition,
  		sizeof(partition));
  }
  