Merge branch 'for-linville' of git://git.kernel.org/pub/scm/linux/kernel/git/luca/wl12xx

1 files changed, 194 insertions, 0 deletions

diff --git a/drivers/net/wireless/ti/wl1251/io.c b/drivers/net/wireless/ti/wl1251/io.c
new file mode 100644
index 000000000000..cdcadbf6ac2c
--- /dev/null
+++ b/drivers/net/wireless/ti/wl1251/io.c
@@ -0,0 +1,194 @@
+/*
+ * 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));
+}