Quelle  io.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0-only
/*
 * This file is part of wl1271
 *
 * Copyright (C) 2008-2010 Nokia Corporation
 *
 * Contact: Luciano Coelho <luciano.coelho@nokia.com>
 */

#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/spi/spi.h>
#include <linux/interrupt.h>

#include "wlcore.h"
#include "debug.h"
#include "wl12xx_80211.h"
#include "io.h"
#include "tx.h"

bool wl1271_set_block_size(struct wl1271 *wl)
{
 if (wl->if_ops->set_block_size) {
  wl->if_ops->set_block_size(wl->dev, WL12XX_BUS_BLOCK_SIZE);
  return true;
 }

 return false;
}

void wlcore_disable_interrupts(struct wl1271 *wl)
{
 disable_irq(wl->irq);
}
EXPORT_SYMBOL_GPL(wlcore_disable_interrupts);

void wlcore_disable_interrupts_nosync(struct wl1271 *wl)
{
 disable_irq_nosync(wl->irq);
}
EXPORT_SYMBOL_GPL(wlcore_disable_interrupts_nosync);

void wlcore_enable_interrupts(struct wl1271 *wl)
{
 enable_irq(wl->irq);
}
EXPORT_SYMBOL_GPL(wlcore_enable_interrupts);

void wlcore_synchronize_interrupts(struct wl1271 *wl)
{
 synchronize_irq(wl->irq);
}
EXPORT_SYMBOL_GPL(wlcore_synchronize_interrupts);

int wlcore_translate_addr(struct wl1271 *wl, int addr)
{
 struct wlcore_partition_set *part = &wl->curr_part;

 /*
 * To translate, first check to which window of addresses the
 * particular address belongs. Then subtract the starting address
 * of that window from the address. Then, add offset of the
 * translated region.
 *
 * The translated regions occur next to each other in physical device
 * memory, so just add the sizes of the preceding address regions to
 * get the offset to the new region.
 */
 if ((addr >= part->mem.start) &&
     (addr < part->mem.start + part->mem.size))
  return addr - part->mem.start;
 else if ((addr >= part->reg.start) &&
   (addr < part->reg.start + part->reg.size))
  return addr - part->reg.start + part->mem.size;
 else if ((addr >= part->mem2.start) &&
   (addr < part->mem2.start + part->mem2.size))
  return addr - part->mem2.start + part->mem.size +
   part->reg.size;
 else if ((addr >= part->mem3.start) &&
   (addr < part->mem3.start + part->mem3.size))
  return addr - part->mem3.start + part->mem.size +
   part->reg.size + part->mem2.size;

 WARN(1, "HW address 0x%x out of range", addr);
 return 0;
}
EXPORT_SYMBOL_GPL(wlcore_translate_addr);

/* Set the partitions to access the chip addresses
 *
 * To simplify driver code, a fixed (virtual) memory map is defined for
 * register and memory addresses. Because in the chipset, in different stages
 * of operation, those addresses will move around, an address translation
 * mechanism is required.
 *
 * There are four partitions (three memory and one register partition),
 * which are mapped to two different areas of the hardware memory.
 *
 *                                Virtual address
 *                                     space
 *
 *                                    |    |
 *                                 ...+----+--> mem.start
 *          Physical address    ...   |    |
 *               space       ...      |    | [PART_0]
 *                        ...         |    |
 *  00000000  <--+----+...         ...+----+--> mem.start + mem.size
 *               |    |         ...   |    |
 *               |MEM |      ...      |    |
 *               |    |   ...         |    |
 *  mem.size  <--+----+...            |    | {unused area)
 *               |    |   ...         |    |
 *               |REG |      ...      |    |
 *  mem.size     |    |         ...   |    |
 *      +     <--+----+...         ...+----+--> reg.start
 *  reg.size     |    |   ...         |    |
 *               |MEM2|      ...      |    | [PART_1]
 *               |    |         ...   |    |
 *                                 ...+----+--> reg.start + reg.size
 *                                    |    |
 *
 */
int wlcore_set_partition(struct wl1271 *wl,
    const struct wlcore_partition_set *p)
{
 int ret;

 /* copy partition info */
 memcpy(&wl->curr_part, p, sizeof(*p));

 wl1271_debug(DEBUG_IO, "mem_start %08X mem_size %08X",
       p->mem.start, p->mem.size);
 wl1271_debug(DEBUG_IO, "reg_start %08X reg_size %08X",
       p->reg.start, p->reg.size);
 wl1271_debug(DEBUG_IO, "mem2_start %08X mem2_size %08X",
       p->mem2.start, p->mem2.size);
 wl1271_debug(DEBUG_IO, "mem3_start %08X mem3_size %08X",
       p->mem3.start, p->mem3.size);

 ret = wlcore_raw_write32(wl, HW_PART0_START_ADDR, p->mem.start);
 if (ret < 0)
  goto out;

 ret = wlcore_raw_write32(wl, HW_PART0_SIZE_ADDR, p->mem.size);
 if (ret < 0)
  goto out;

 ret = wlcore_raw_write32(wl, HW_PART1_START_ADDR, p->reg.start);
 if (ret < 0)
  goto out;

 ret = wlcore_raw_write32(wl, HW_PART1_SIZE_ADDR, p->reg.size);
 if (ret < 0)
  goto out;

 ret = wlcore_raw_write32(wl, HW_PART2_START_ADDR, p->mem2.start);
 if (ret < 0)
  goto out;

 ret = wlcore_raw_write32(wl, HW_PART2_SIZE_ADDR, p->mem2.size);
 if (ret < 0)
  goto out;

 /* wl12xx only: We don't need the size of the last partition,
 * as it is automatically calculated based on the total memory
 * size and the sizes of the previous partitions.
 *
 * wl18xx re-defines the HW_PART3 addresses for logger over
 * SDIO support. wl12xx is expecting the write to
 * HW_PART3_START_ADDR at offset 24. This creates conflict
 * between the addresses.
 * In order to fix this the expected value is written to
 * HW_PART3_SIZE_ADDR instead which is at offset 24 after changes.
 */
 ret = wlcore_raw_write32(wl, HW_PART3_START_ADDR, p->mem3.start);
 if (ret < 0)
  goto out;

 ret = wlcore_raw_write32(wl, HW_PART3_SIZE_ADDR, p->mem3.size);
 if (ret < 0)
  goto out;

out:
 return ret;
}
EXPORT_SYMBOL_GPL(wlcore_set_partition);

void wl1271_io_reset(struct wl1271 *wl)
{
 if (wl->if_ops->reset)
  wl->if_ops->reset(wl->dev);
}

void wl1271_io_init(struct wl1271 *wl)
{
 if (wl->if_ops->init)
  wl->if_ops->init(wl->dev);
}