189 lines
6.2 KiB
C
189 lines
6.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* This file is part of wl12xx
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*
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* Copyright (C) 2008 Nokia Corporation
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*/
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#include "wl1251.h"
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#include "reg.h"
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#include "io.h"
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/* FIXME: this is static data nowadays and the table can be removed */
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static enum wl12xx_acx_int_reg wl1251_io_reg_table[ACX_REG_TABLE_LEN] = {
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[ACX_REG_INTERRUPT_TRIG] = (REGISTERS_BASE + 0x0474),
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[ACX_REG_INTERRUPT_TRIG_H] = (REGISTERS_BASE + 0x0478),
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[ACX_REG_INTERRUPT_MASK] = (REGISTERS_BASE + 0x0494),
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[ACX_REG_HINT_MASK_SET] = (REGISTERS_BASE + 0x0498),
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[ACX_REG_HINT_MASK_CLR] = (REGISTERS_BASE + 0x049C),
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[ACX_REG_INTERRUPT_NO_CLEAR] = (REGISTERS_BASE + 0x04B0),
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[ACX_REG_INTERRUPT_CLEAR] = (REGISTERS_BASE + 0x04A4),
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[ACX_REG_INTERRUPT_ACK] = (REGISTERS_BASE + 0x04A8),
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[ACX_REG_SLV_SOFT_RESET] = (REGISTERS_BASE + 0x0000),
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[ACX_REG_EE_START] = (REGISTERS_BASE + 0x080C),
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[ACX_REG_ECPU_CONTROL] = (REGISTERS_BASE + 0x0804)
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};
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static int wl1251_translate_reg_addr(struct wl1251 *wl, int addr)
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{
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/* If the address is lower than REGISTERS_BASE, it means that this is
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* a chip-specific register address, so look it up in the registers
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* table */
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if (addr < REGISTERS_BASE) {
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/* Make sure we don't go over the table */
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if (addr >= ACX_REG_TABLE_LEN) {
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wl1251_error("address out of range (%d)", addr);
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return -EINVAL;
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}
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addr = wl1251_io_reg_table[addr];
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}
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return addr - wl->physical_reg_addr + wl->virtual_reg_addr;
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}
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static int wl1251_translate_mem_addr(struct wl1251 *wl, int addr)
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{
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return addr - wl->physical_mem_addr + wl->virtual_mem_addr;
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}
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void wl1251_mem_read(struct wl1251 *wl, int addr, void *buf, size_t len)
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{
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int physical;
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physical = wl1251_translate_mem_addr(wl, addr);
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wl->if_ops->read(wl, physical, buf, len);
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}
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void wl1251_mem_write(struct wl1251 *wl, int addr, void *buf, size_t len)
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{
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int physical;
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physical = wl1251_translate_mem_addr(wl, addr);
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wl->if_ops->write(wl, physical, buf, len);
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}
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u32 wl1251_mem_read32(struct wl1251 *wl, int addr)
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{
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return wl1251_read32(wl, wl1251_translate_mem_addr(wl, addr));
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}
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void wl1251_mem_write32(struct wl1251 *wl, int addr, u32 val)
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{
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wl1251_write32(wl, wl1251_translate_mem_addr(wl, addr), val);
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}
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u32 wl1251_reg_read32(struct wl1251 *wl, int addr)
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{
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return wl1251_read32(wl, wl1251_translate_reg_addr(wl, addr));
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}
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void wl1251_reg_write32(struct wl1251 *wl, int addr, u32 val)
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{
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wl1251_write32(wl, wl1251_translate_reg_addr(wl, addr), val);
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}
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/* Set the partitions to access the chip addresses.
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*
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* There are two VIRTUAL partitions (the memory partition and the
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* registers partition), which are mapped to two different areas of the
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* PHYSICAL (hardware) memory. This function also makes other checks to
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* ensure that the partitions are not overlapping. In the diagram below, the
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* memory partition comes before the register partition, but the opposite is
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* also supported.
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*
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* PHYSICAL address
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* space
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*
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* | |
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* ...+----+--> mem_start
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* VIRTUAL address ... | |
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* space ... | | [PART_0]
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* ... | |
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* 0x00000000 <--+----+... ...+----+--> mem_start + mem_size
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* | | ... | |
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* |MEM | ... | |
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* | | ... | |
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* part_size <--+----+... | | {unused area)
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* | | ... | |
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* |REG | ... | |
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* part_size | | ... | |
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* + <--+----+... ...+----+--> reg_start
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* reg_size ... | |
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* ... | | [PART_1]
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* ... | |
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* ...+----+--> reg_start + reg_size
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* | |
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*
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*/
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void wl1251_set_partition(struct wl1251 *wl,
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u32 mem_start, u32 mem_size,
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u32 reg_start, u32 reg_size)
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{
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struct wl1251_partition_set *partition;
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partition = kmalloc(sizeof(*partition), GFP_KERNEL);
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if (!partition) {
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wl1251_error("can not allocate partition buffer");
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return;
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}
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wl1251_debug(DEBUG_SPI, "mem_start %08X mem_size %08X",
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mem_start, mem_size);
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wl1251_debug(DEBUG_SPI, "reg_start %08X reg_size %08X",
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reg_start, reg_size);
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/* Make sure that the two partitions together don't exceed the
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* address range */
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if ((mem_size + reg_size) > HW_ACCESS_MEMORY_MAX_RANGE) {
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wl1251_debug(DEBUG_SPI, "Total size exceeds maximum virtual"
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" address range. Truncating partition[0].");
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mem_size = HW_ACCESS_MEMORY_MAX_RANGE - reg_size;
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wl1251_debug(DEBUG_SPI, "mem_start %08X mem_size %08X",
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mem_start, mem_size);
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wl1251_debug(DEBUG_SPI, "reg_start %08X reg_size %08X",
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reg_start, reg_size);
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}
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if ((mem_start < reg_start) &&
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((mem_start + mem_size) > reg_start)) {
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/* Guarantee that the memory partition doesn't overlap the
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* registers partition */
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wl1251_debug(DEBUG_SPI, "End of partition[0] is "
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"overlapping partition[1]. Adjusted.");
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mem_size = reg_start - mem_start;
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wl1251_debug(DEBUG_SPI, "mem_start %08X mem_size %08X",
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mem_start, mem_size);
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wl1251_debug(DEBUG_SPI, "reg_start %08X reg_size %08X",
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reg_start, reg_size);
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} else if ((reg_start < mem_start) &&
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((reg_start + reg_size) > mem_start)) {
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/* Guarantee that the register partition doesn't overlap the
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* memory partition */
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wl1251_debug(DEBUG_SPI, "End of partition[1] is"
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" overlapping partition[0]. Adjusted.");
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reg_size = mem_start - reg_start;
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wl1251_debug(DEBUG_SPI, "mem_start %08X mem_size %08X",
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mem_start, mem_size);
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wl1251_debug(DEBUG_SPI, "reg_start %08X reg_size %08X",
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reg_start, reg_size);
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}
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partition->mem.start = mem_start;
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partition->mem.size = mem_size;
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partition->reg.start = reg_start;
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partition->reg.size = reg_size;
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wl->physical_mem_addr = mem_start;
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wl->physical_reg_addr = reg_start;
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wl->virtual_mem_addr = 0;
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wl->virtual_reg_addr = mem_size;
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wl->if_ops->write(wl, HW_ACCESS_PART0_SIZE_ADDR, partition,
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sizeof(*partition));
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kfree(partition);
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}
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