satip-axe/kernel/drivers/net/wireless/wl12xx/wl1271_boot.c

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/*
* This file is part of wl1271
*
* Copyright (C) 2008-2009 Nokia Corporation
*
* Contact: Luciano Coelho <luciano.coelho@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 <linux/gpio.h>
#include "wl1271_acx.h"
#include "wl1271_reg.h"
#include "wl1271_boot.h"
#include "wl1271_spi.h"
#include "wl1271_event.h"
static struct wl1271_partition_set part_table[PART_TABLE_LEN] = {
[PART_DOWN] = {
.mem = {
.start = 0x00000000,
.size = 0x000177c0
},
.reg = {
.start = REGISTERS_BASE,
.size = 0x00008800
},
},
[PART_WORK] = {
.mem = {
.start = 0x00040000,
.size = 0x00014fc0
},
.reg = {
.start = REGISTERS_BASE,
.size = 0x0000b000
},
},
[PART_DRPW] = {
.mem = {
.start = 0x00040000,
.size = 0x00014fc0
},
.reg = {
.start = DRPW_BASE,
.size = 0x00006000
}
}
};
static void wl1271_boot_set_ecpu_ctrl(struct wl1271 *wl, u32 flag)
{
u32 cpu_ctrl;
/* 10.5.0 run the firmware (I) */
cpu_ctrl = wl1271_reg_read32(wl, ACX_REG_ECPU_CONTROL);
/* 10.5.1 run the firmware (II) */
cpu_ctrl |= flag;
wl1271_reg_write32(wl, ACX_REG_ECPU_CONTROL, cpu_ctrl);
}
static void wl1271_boot_fw_version(struct wl1271 *wl)
{
struct wl1271_static_data static_data;
wl1271_spi_mem_read(wl, wl->cmd_box_addr,
&static_data, sizeof(static_data));
strncpy(wl->chip.fw_ver, static_data.fw_version,
sizeof(wl->chip.fw_ver));
/* make sure the string is NULL-terminated */
wl->chip.fw_ver[sizeof(wl->chip.fw_ver) - 1] = '\0';
}
static int wl1271_boot_upload_firmware_chunk(struct wl1271 *wl, void *buf,
size_t fw_data_len, u32 dest)
{
int addr, chunk_num, partition_limit;
u8 *p;
/* whal_FwCtrl_LoadFwImageSm() */
wl1271_debug(DEBUG_BOOT, "starting firmware upload");
wl1271_debug(DEBUG_BOOT, "fw_data_len %zd chunk_size %d",
fw_data_len, CHUNK_SIZE);
if ((fw_data_len % 4) != 0) {
wl1271_error("firmware length not multiple of four");
return -EIO;
}
wl1271_set_partition(wl, dest,
part_table[PART_DOWN].mem.size,
part_table[PART_DOWN].reg.start,
part_table[PART_DOWN].reg.size);
/* 10.1 set partition limit and chunk num */
chunk_num = 0;
partition_limit = part_table[PART_DOWN].mem.size;
while (chunk_num < fw_data_len / CHUNK_SIZE) {
/* 10.2 update partition, if needed */
addr = dest + (chunk_num + 2) * CHUNK_SIZE;
if (addr > partition_limit) {
addr = dest + chunk_num * CHUNK_SIZE;
partition_limit = chunk_num * CHUNK_SIZE +
part_table[PART_DOWN].mem.size;
/* FIXME: Over 80 chars! */
wl1271_set_partition(wl,
addr,
part_table[PART_DOWN].mem.size,
part_table[PART_DOWN].reg.start,
part_table[PART_DOWN].reg.size);
}
/* 10.3 upload the chunk */
addr = dest + chunk_num * CHUNK_SIZE;
p = buf + chunk_num * CHUNK_SIZE;
wl1271_debug(DEBUG_BOOT, "uploading fw chunk 0x%p to 0x%x",
p, addr);
wl1271_spi_mem_write(wl, addr, p, CHUNK_SIZE);
chunk_num++;
}
/* 10.4 upload the last chunk */
addr = dest + chunk_num * CHUNK_SIZE;
p = buf + chunk_num * CHUNK_SIZE;
wl1271_debug(DEBUG_BOOT, "uploading fw last chunk (%zd B) 0x%p to 0x%x",
fw_data_len % CHUNK_SIZE, p, addr);
wl1271_spi_mem_write(wl, addr, p, fw_data_len % CHUNK_SIZE);
return 0;
}
static int wl1271_boot_upload_firmware(struct wl1271 *wl)
{
u32 chunks, addr, len;
u8 *fw;
fw = wl->fw;
chunks = be32_to_cpup((u32 *) fw);
fw += sizeof(u32);
wl1271_debug(DEBUG_BOOT, "firmware chunks to be uploaded: %u", chunks);
while (chunks--) {
addr = be32_to_cpup((u32 *) fw);
fw += sizeof(u32);
len = be32_to_cpup((u32 *) fw);
fw += sizeof(u32);
if (len > 300000) {
wl1271_info("firmware chunk too long: %u", len);
return -EINVAL;
}
wl1271_debug(DEBUG_BOOT, "chunk %d addr 0x%x len %u",
chunks, addr, len);
wl1271_boot_upload_firmware_chunk(wl, fw, len, addr);
fw += len;
}
return 0;
}
static int wl1271_boot_upload_nvs(struct wl1271 *wl)
{
size_t nvs_len, burst_len;
int i;
u32 dest_addr, val;
u8 *nvs_ptr, *nvs, *nvs_aligned;
nvs = wl->nvs;
if (nvs == NULL)
return -ENODEV;
nvs_ptr = nvs;
nvs_len = wl->nvs_len;
/* Update the device MAC address into the nvs */
nvs[11] = wl->mac_addr[0];
nvs[10] = wl->mac_addr[1];
nvs[6] = wl->mac_addr[2];
nvs[5] = wl->mac_addr[3];
nvs[4] = wl->mac_addr[4];
nvs[3] = wl->mac_addr[5];
/*
* Layout before the actual NVS tables:
* 1 byte : burst length.
* 2 bytes: destination address.
* n bytes: data to burst copy.
*
* This is ended by a 0 length, then the NVS tables.
*/
/* FIXME: Do we need to check here whether the LSB is 1? */
while (nvs_ptr[0]) {
burst_len = nvs_ptr[0];
dest_addr = (nvs_ptr[1] & 0xfe) | ((u32)(nvs_ptr[2] << 8));
/* FIXME: Due to our new wl1271_translate_reg_addr function,
we need to add the REGISTER_BASE to the destination */
dest_addr += REGISTERS_BASE;
/* We move our pointer to the data */
nvs_ptr += 3;
for (i = 0; i < burst_len; i++) {
val = (nvs_ptr[0] | (nvs_ptr[1] << 8)
| (nvs_ptr[2] << 16) | (nvs_ptr[3] << 24));
wl1271_debug(DEBUG_BOOT,
"nvs burst write 0x%x: 0x%x",
dest_addr, val);
wl1271_reg_write32(wl, dest_addr, val);
nvs_ptr += 4;
dest_addr += 4;
}
}
/*
* We've reached the first zero length, the first NVS table
* is 7 bytes further.
*/
nvs_ptr += 7;
nvs_len -= nvs_ptr - nvs;
nvs_len = ALIGN(nvs_len, 4);
/* FIXME: The driver sets the partition here, but this is not needed,
since it sets to the same one as currently in use */
/* Now we must set the partition correctly */
wl1271_set_partition(wl,
part_table[PART_WORK].mem.start,
part_table[PART_WORK].mem.size,
part_table[PART_WORK].reg.start,
part_table[PART_WORK].reg.size);
/* Copy the NVS tables to a new block to ensure alignment */
nvs_aligned = kmemdup(nvs_ptr, nvs_len, GFP_KERNEL);
/* And finally we upload the NVS tables */
/* FIXME: In wl1271, we upload everything at once.
No endianness handling needed here?! The ref driver doesn't do
anything about it at this point */
wl1271_spi_mem_write(wl, CMD_MBOX_ADDRESS, nvs_aligned, nvs_len);
kfree(nvs_aligned);
return 0;
}
static void wl1271_boot_enable_interrupts(struct wl1271 *wl)
{
enable_irq(wl->irq);
wl1271_reg_write32(wl, ACX_REG_INTERRUPT_MASK,
WL1271_ACX_INTR_ALL & ~(WL1271_INTR_MASK));
wl1271_reg_write32(wl, HI_CFG, HI_CFG_DEF_VAL);
}
static int wl1271_boot_soft_reset(struct wl1271 *wl)
{
unsigned long timeout;
u32 boot_data;
/* perform soft reset */
wl1271_reg_write32(wl, ACX_REG_SLV_SOFT_RESET, ACX_SLV_SOFT_RESET_BIT);
/* SOFT_RESET is self clearing */
timeout = jiffies + usecs_to_jiffies(SOFT_RESET_MAX_TIME);
while (1) {
boot_data = wl1271_reg_read32(wl, ACX_REG_SLV_SOFT_RESET);
wl1271_debug(DEBUG_BOOT, "soft reset bootdata 0x%x", boot_data);
if ((boot_data & ACX_SLV_SOFT_RESET_BIT) == 0)
break;
if (time_after(jiffies, timeout)) {
/* 1.2 check pWhalBus->uSelfClearTime if the
* timeout was reached */
wl1271_error("soft reset timeout");
return -1;
}
udelay(SOFT_RESET_STALL_TIME);
}
/* disable Rx/Tx */
wl1271_reg_write32(wl, ENABLE, 0x0);
/* disable auto calibration on start*/
wl1271_reg_write32(wl, SPARE_A2, 0xffff);
return 0;
}
static int wl1271_boot_run_firmware(struct wl1271 *wl)
{
int loop, ret;
u32 chip_id, interrupt;
wl1271_boot_set_ecpu_ctrl(wl, ECPU_CONTROL_HALT);
chip_id = wl1271_reg_read32(wl, CHIP_ID_B);
wl1271_debug(DEBUG_BOOT, "chip id after firmware boot: 0x%x", chip_id);
if (chip_id != wl->chip.id) {
wl1271_error("chip id doesn't match after firmware boot");
return -EIO;
}
/* wait for init to complete */
loop = 0;
while (loop++ < INIT_LOOP) {
udelay(INIT_LOOP_DELAY);
interrupt = wl1271_reg_read32(wl, ACX_REG_INTERRUPT_NO_CLEAR);
if (interrupt == 0xffffffff) {
wl1271_error("error reading hardware complete "
"init indication");
return -EIO;
}
/* check that ACX_INTR_INIT_COMPLETE is enabled */
else if (interrupt & WL1271_ACX_INTR_INIT_COMPLETE) {
wl1271_reg_write32(wl, ACX_REG_INTERRUPT_ACK,
WL1271_ACX_INTR_INIT_COMPLETE);
break;
}
}
if (loop >= INIT_LOOP) {
wl1271_error("timeout waiting for the hardware to "
"complete initialization");
return -EIO;
}
/* get hardware config command mail box */
wl->cmd_box_addr = wl1271_reg_read32(wl, REG_COMMAND_MAILBOX_PTR);
/* get hardware config event mail box */
wl->event_box_addr = wl1271_reg_read32(wl, REG_EVENT_MAILBOX_PTR);
/* set the working partition to its "running" mode offset */
wl1271_set_partition(wl,
part_table[PART_WORK].mem.start,
part_table[PART_WORK].mem.size,
part_table[PART_WORK].reg.start,
part_table[PART_WORK].reg.size);
wl1271_debug(DEBUG_MAILBOX, "cmd_box_addr 0x%x event_box_addr 0x%x",
wl->cmd_box_addr, wl->event_box_addr);
wl1271_boot_fw_version(wl);
/*
* in case of full asynchronous mode the firmware event must be
* ready to receive event from the command mailbox
*/
/* enable gpio interrupts */
wl1271_boot_enable_interrupts(wl);
/* unmask all mbox events */
wl->event_mask = 0xffffffff;
ret = wl1271_event_unmask(wl);
if (ret < 0) {
wl1271_error("EVENT mask setting failed");
return ret;
}
wl1271_event_mbox_config(wl);
/* firmware startup completed */
return 0;
}
static int wl1271_boot_write_irq_polarity(struct wl1271 *wl)
{
u32 polarity, status, i;
wl1271_reg_write32(wl, OCP_POR_CTR, OCP_REG_POLARITY);
wl1271_reg_write32(wl, OCP_CMD, OCP_CMD_READ);
/* Wait until the command is complete (ie. bit 18 is set) */
for (i = 0; i < OCP_CMD_LOOP; i++) {
polarity = wl1271_reg_read32(wl, OCP_DATA_READ);
if (polarity & OCP_READY_MASK)
break;
}
if (i == OCP_CMD_LOOP) {
wl1271_error("OCP command timeout!");
return -EIO;
}
status = polarity & OCP_STATUS_MASK;
if (status != OCP_STATUS_OK) {
wl1271_error("OCP command failed (%d)", status);
return -EIO;
}
/* We use HIGH polarity, so unset the LOW bit */
polarity &= ~POLARITY_LOW;
wl1271_reg_write32(wl, OCP_POR_CTR, OCP_REG_POLARITY);
wl1271_reg_write32(wl, OCP_DATA_WRITE, polarity);
wl1271_reg_write32(wl, OCP_CMD, OCP_CMD_WRITE);
return 0;
}
int wl1271_boot(struct wl1271 *wl)
{
int ret = 0;
u32 tmp, clk, pause;
if (REF_CLOCK == 0 || REF_CLOCK == 2)
/* ref clk: 19.2/38.4 */
clk = 0x3;
else if (REF_CLOCK == 1 || REF_CLOCK == 3)
/* ref clk: 26/52 */
clk = 0x5;
wl1271_reg_write32(wl, PLL_PARAMETERS, clk);
pause = wl1271_reg_read32(wl, PLL_PARAMETERS);
wl1271_debug(DEBUG_BOOT, "pause1 0x%x", pause);
pause &= ~(WU_COUNTER_PAUSE_VAL); /* FIXME: This should probably be
* WU_COUNTER_PAUSE_VAL instead of
* 0x3ff (magic number ). How does
* this work?! */
pause |= WU_COUNTER_PAUSE_VAL;
wl1271_reg_write32(wl, WU_COUNTER_PAUSE, pause);
/* Continue the ELP wake up sequence */
wl1271_reg_write32(wl, WELP_ARM_COMMAND, WELP_ARM_COMMAND_VAL);
udelay(500);
wl1271_set_partition(wl,
part_table[PART_DRPW].mem.start,
part_table[PART_DRPW].mem.size,
part_table[PART_DRPW].reg.start,
part_table[PART_DRPW].reg.size);
/* Read-modify-write DRPW_SCRATCH_START register (see next state)
to be used by DRPw FW. The RTRIM value will be added by the FW
before taking DRPw out of reset */
wl1271_debug(DEBUG_BOOT, "DRPW_SCRATCH_START %08x", DRPW_SCRATCH_START);
clk = wl1271_reg_read32(wl, DRPW_SCRATCH_START);
wl1271_debug(DEBUG_BOOT, "clk2 0x%x", clk);
/* 2 */
clk |= (REF_CLOCK << 1) << 4;
wl1271_reg_write32(wl, DRPW_SCRATCH_START, clk);
wl1271_set_partition(wl,
part_table[PART_WORK].mem.start,
part_table[PART_WORK].mem.size,
part_table[PART_WORK].reg.start,
part_table[PART_WORK].reg.size);
/* Disable interrupts */
wl1271_reg_write32(wl, ACX_REG_INTERRUPT_MASK, WL1271_ACX_INTR_ALL);
ret = wl1271_boot_soft_reset(wl);
if (ret < 0)
goto out;
/* 2. start processing NVS file */
ret = wl1271_boot_upload_nvs(wl);
if (ret < 0)
goto out;
/* write firmware's last address (ie. it's length) to
* ACX_EEPROMLESS_IND_REG */
wl1271_debug(DEBUG_BOOT, "ACX_EEPROMLESS_IND_REG");
wl1271_reg_write32(wl, ACX_EEPROMLESS_IND_REG, ACX_EEPROMLESS_IND_REG);
tmp = wl1271_reg_read32(wl, CHIP_ID_B);
wl1271_debug(DEBUG_BOOT, "chip id 0x%x", tmp);
/* 6. read the EEPROM parameters */
tmp = wl1271_reg_read32(wl, SCR_PAD2);
ret = wl1271_boot_write_irq_polarity(wl);
if (ret < 0)
goto out;
/* FIXME: Need to check whether this is really what we want */
wl1271_reg_write32(wl, ACX_REG_INTERRUPT_MASK,
WL1271_ACX_ALL_EVENTS_VECTOR);
/* WL1271: The reference driver skips steps 7 to 10 (jumps directly
* to upload_fw) */
ret = wl1271_boot_upload_firmware(wl);
if (ret < 0)
goto out;
/* 10.5 start firmware */
ret = wl1271_boot_run_firmware(wl);
if (ret < 0)
goto out;
/* set the wl1271 default filters */
wl->rx_config = WL1271_DEFAULT_RX_CONFIG;
wl->rx_filter = WL1271_DEFAULT_RX_FILTER;
wl1271_event_mbox_config(wl);
out:
return ret;
}