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path: root/drivers/net/wireless/wl12xx/wl1251_io.c
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Diffstat (limited to 'drivers/net/wireless/wl12xx/wl1251_io.c')
-rw-r--r--drivers/net/wireless/wl12xx/wl1251_io.c196
1 files changed, 196 insertions, 0 deletions
diff --git a/drivers/net/wireless/wl12xx/wl1251_io.c b/drivers/net/wireless/wl12xx/wl1251_io.c
new file mode 100644
index 000000000000..f1c232e0887f
--- /dev/null
+++ b/drivers/net/wireless/wl12xx/wl1251_io.c
@@ -0,0 +1,196 @@
+/*
+ * This file is part of wl12xx
+ *
+ * Copyright (C) 2008 Nokia Corporation
+ *
+ * Contact: Kalle Valo <kalle.valo@nokia.com>
+ *
+ * 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 "wl1251_reg.h"
+#include "wl1251_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));
+}
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-28 18:59:17 +0300