// SPDX-License-Identifier: GPL-2.0-only
/*
* This file is part of wl1251
*
* Copyright ( C ) 2008 Nokia Corporation
*/
#include <linux/slab.h>
#include "reg.h"
#include "boot.h"
#include "io.h"
#include "spi.h"
#include "event.h"
#include "acx.h"
void wl1251_boot_target_enable_interrupts(struct wl1251 *wl)
{
wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, ~(wl->intr_mask));
wl1251_reg_write32(wl, HI_CFG, HI_CFG_DEF_VAL);
}
int wl1251_boot_soft_reset(struct wl1251 *wl)
{
unsigned long timeout;
u32 boot_data;
/* perform soft reset */
wl1251_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 = wl1251_reg_read32(wl, ACX_REG_SLV_SOFT_RESET);
wl1251_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 */
wl1251_error("soft reset timeout" );
return -1 ;
}
udelay(SOFT_RESET_STALL_TIME);
}
/* disable Rx/Tx */
wl1251_reg_write32(wl, ENABLE, 0 x0);
/* disable auto calibration on start*/
wl1251_reg_write32(wl, SPARE_A2, 0 xffff);
return 0 ;
}
int wl1251_boot_init_seq(struct wl1251 *wl)
{
u32 scr_pad6, init_data, tmp, elp_cmd, ref_freq;
/*
* col # 1 : INTEGER_DIVIDER
* col # 2 : FRACTIONAL_DIVIDER
* col # 3 : ATTN_BB
* col # 4 : ALPHA_BB
* col # 5 : STOP_TIME_BB
* col # 6 : BB_PLL_LOOP_FILTER
*/
static const u32 LUT[REF_FREQ_NUM][LUT_PARAM_NUM] = {
{ 83 , 87381 , 0 xB, 5 , 0 xF00, 3 }, /* REF_FREQ_19_2*/
{ 61 , 141154 , 0 xB, 5 , 0 x1450, 2 }, /* REF_FREQ_26_0*/
{ 41 , 174763 , 0 xC, 6 , 0 x2D00, 1 }, /* REF_FREQ_38_4*/
{ 40 , 0 , 0 xC, 6 , 0 x2EE0, 1 }, /* REF_FREQ_40_0*/
{ 47 , 162280 , 0 xC, 6 , 0 x2760, 1 } /* REF_FREQ_33_6 */
};
/* read NVS params */
scr_pad6 = wl1251_reg_read32(wl, SCR_PAD6);
wl1251_debug(DEBUG_BOOT, "scr_pad6 0x%x" , scr_pad6);
/* read ELP_CMD */
elp_cmd = wl1251_reg_read32(wl, ELP_CMD);
wl1251_debug(DEBUG_BOOT, "elp_cmd 0x%x" , elp_cmd);
/* set the BB calibration time to be 300 usec (PLL_CAL_TIME) */
ref_freq = scr_pad6 & 0 x000000FF;
wl1251_debug(DEBUG_BOOT, "ref_freq 0x%x" , ref_freq);
wl1251_reg_write32(wl, PLL_CAL_TIME, 0 x9);
/*
* PG 1 . 2 : set the clock buffer time to be 210 usec ( CLK_BUF_TIME )
*/
wl1251_reg_write32(wl, CLK_BUF_TIME, 0 x6);
/*
* set the clock detect feature to work in the restart wu procedure
* ( ELP_CFG_MODE [ 14 ] ) and Select the clock source type
* ( ELP_CFG_MODE [ 13 : 12 ] )
*/
tmp = ((scr_pad6 & 0 x0000FF00) << 4 ) | 0 x00004000;
wl1251_reg_write32(wl, ELP_CFG_MODE, tmp);
/* PG 1.2: enable the BB PLL fix. Enable the PLL_LIMP_CLK_EN_CMD */
elp_cmd |= 0 x00000040;
wl1251_reg_write32(wl, ELP_CMD, elp_cmd);
/* PG 1.2: Set the BB PLL stable time to be 1000usec
* (PLL_STABLE_TIME) */
wl1251_reg_write32(wl, CFG_PLL_SYNC_CNT, 0 x20);
/* PG 1.2: read clock request time */
init_data = wl1251_reg_read32(wl, CLK_REQ_TIME);
/*
* PG 1 . 2 : set the clock request time to be ref_clk_settling_time -
* 1 ms = 4 ms
*/
if (init_data > 0 x21)
tmp = init_data - 0 x21;
else
tmp = 0 ;
wl1251_reg_write32(wl, CLK_REQ_TIME, tmp);
/* set BB PLL configurations in RF AFE */
wl1251_reg_write32(wl, 0 x003058cc, 0 x4B5);
/* set RF_AFE_REG_5 */
wl1251_reg_write32(wl, 0 x003058d4, 0 x50);
/* set RF_AFE_CTRL_REG_2 */
wl1251_reg_write32(wl, 0 x00305948, 0 x11c001);
/*
* change RF PLL and BB PLL divider for VCO clock and adjust VCO
* bais current ( RF_AFE_REG_13 )
*/
wl1251_reg_write32(wl, 0 x003058f4, 0 x1e);
/* set BB PLL configurations */
tmp = LUT[ref_freq][LUT_PARAM_INTEGER_DIVIDER] | 0 x00017000;
wl1251_reg_write32(wl, 0 x00305840, tmp);
/* set fractional divider according to Appendix C-BB PLL
* Calculations
*/
tmp = LUT[ref_freq][LUT_PARAM_FRACTIONAL_DIVIDER];
wl1251_reg_write32(wl, 0 x00305844, tmp);
/* set the initial data for the sigma delta */
wl1251_reg_write32(wl, 0 x00305848, 0 x3039);
/*
* set the accumulator attenuation value , calibration loop1
* ( alpha ) , calibration loop2 ( beta ) , calibration loop3 ( gamma ) and
* the VCO gain
*/
tmp = (LUT[ref_freq][LUT_PARAM_ATTN_BB] << 16 ) |
(LUT[ref_freq][LUT_PARAM_ALPHA_BB] << 12 ) | 0 x1;
wl1251_reg_write32(wl, 0 x00305854, tmp);
/*
* set the calibration stop time after holdoff time expires and set
* settling time HOLD_OFF_TIME_BB
*/
tmp = LUT[ref_freq][LUT_PARAM_STOP_TIME_BB] | 0 x000A0000;
wl1251_reg_write32(wl, 0 x00305858, tmp);
/*
* set BB PLL Loop filter capacitor3 - BB_C3 [ 2 : 0 ] and set BB PLL
* constant leakage current to linearize PFD to 0 uA -
* BB_ILOOPF [ 7 : 3 ]
*/
tmp = LUT[ref_freq][LUT_PARAM_BB_PLL_LOOP_FILTER] | 0 x00000030;
wl1251_reg_write32(wl, 0 x003058f8, tmp);
/*
* set regulator output voltage for n divider to
* 1 . 35 - BB_REFDIV [ 1 : 0 ] , set charge pump current - BB_CPGAIN [ 4 : 2 ] ,
* set BB PLL Loop filter capacitor2 - BB_C2 [ 7 : 5 ] , set gain of BB
* PLL auto - call to normal mode - BB_CALGAIN_3DB [ 8 ]
*/
wl1251_reg_write32(wl, 0 x003058f0, 0 x29);
/* enable restart wakeup sequence (ELP_CMD[0]) */
wl1251_reg_write32(wl, ELP_CMD, elp_cmd | 0 x1);
/* restart sequence completed */
udelay(2000 );
return 0 ;
}
static void wl1251_boot_set_ecpu_ctrl(struct wl1251 *wl, u32 flag)
{
u32 cpu_ctrl;
/* 10.5.0 run the firmware (I) */
cpu_ctrl = wl1251_reg_read32(wl, ACX_REG_ECPU_CONTROL);
/* 10.5.1 run the firmware (II) */
cpu_ctrl &= ~flag;
wl1251_reg_write32(wl, ACX_REG_ECPU_CONTROL, cpu_ctrl);
}
int wl1251_boot_run_firmware(struct wl1251 *wl)
{
int loop, ret;
u32 chip_id, acx_intr;
wl1251_boot_set_ecpu_ctrl(wl, ECPU_CONTROL_HALT);
chip_id = wl1251_reg_read32(wl, CHIP_ID_B);
wl1251_debug(DEBUG_BOOT, "chip id after firmware boot: 0x%x" , chip_id);
if (chip_id != wl->chip_id) {
wl1251_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);
acx_intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_NO_CLEAR);
if (acx_intr == 0 xffffffff) {
wl1251_error("error reading hardware complete "
"init indication" );
return -EIO;
}
/* check that ACX_INTR_INIT_COMPLETE is enabled */
else if (acx_intr & WL1251_ACX_INTR_INIT_COMPLETE) {
wl1251_reg_write32(wl, ACX_REG_INTERRUPT_ACK,
WL1251_ACX_INTR_INIT_COMPLETE);
break ;
}
}
if (loop > INIT_LOOP) {
wl1251_error("timeout waiting for the hardware to "
"complete initialization" );
return -EIO;
}
/* get hardware config command mail box */
wl->cmd_box_addr = wl1251_reg_read32(wl, REG_COMMAND_MAILBOX_PTR);
/* get hardware config event mail box */
wl->event_box_addr = wl1251_reg_read32(wl, REG_EVENT_MAILBOX_PTR);
/* set the working partition to its "running" mode offset */
wl1251_set_partition(wl, WL1251_PART_WORK_MEM_START,
WL1251_PART_WORK_MEM_SIZE,
WL1251_PART_WORK_REG_START,
WL1251_PART_WORK_REG_SIZE);
wl1251_debug(DEBUG_MAILBOX, "cmd_box_addr 0x%x event_box_addr 0x%x" ,
wl->cmd_box_addr, wl->event_box_addr);
wl1251_acx_fw_version(wl, wl->fw_ver, sizeof (wl->fw_ver));
/*
* in case of full asynchronous mode the firmware event must be
* ready to receive event from the command mailbox
*/
/* enable gpio interrupts */
wl1251_enable_interrupts(wl);
/* Enable target's interrupts */
wl->intr_mask = WL1251_ACX_INTR_RX0_DATA |
WL1251_ACX_INTR_RX1_DATA |
WL1251_ACX_INTR_TX_RESULT |
WL1251_ACX_INTR_EVENT_A |
WL1251_ACX_INTR_EVENT_B |
WL1251_ACX_INTR_INIT_COMPLETE;
wl1251_boot_target_enable_interrupts(wl);
wl->event_mask = SCAN_COMPLETE_EVENT_ID | BSS_LOSE_EVENT_ID |
SYNCHRONIZATION_TIMEOUT_EVENT_ID |
ROAMING_TRIGGER_LOW_RSSI_EVENT_ID |
ROAMING_TRIGGER_REGAINED_RSSI_EVENT_ID |
REGAINED_BSS_EVENT_ID | BT_PTA_SENSE_EVENT_ID |
BT_PTA_PREDICTION_EVENT_ID | JOIN_EVENT_COMPLETE_ID |
PS_REPORT_EVENT_ID;
ret = wl1251_event_unmask(wl);
if (ret < 0 ) {
wl1251_error("EVENT mask setting failed" );
return ret;
}
wl1251_event_mbox_config(wl);
/* firmware startup completed */
return 0 ;
}
static int wl1251_boot_upload_firmware(struct wl1251 *wl)
{
int addr, chunk_num, partition_limit;
size_t fw_data_len, len;
u8 *p, *buf;
/* whal_FwCtrl_LoadFwImageSm() */
wl1251_debug(DEBUG_BOOT, "chip id before fw upload: 0x%x" ,
wl1251_reg_read32(wl, CHIP_ID_B));
/* 10.0 check firmware length and set partition */
fw_data_len = (wl->fw[4 ] << 24 ) | (wl->fw[5 ] << 16 ) |
(wl->fw[6 ] << 8 ) | (wl->fw[7 ]);
wl1251_debug(DEBUG_BOOT, "fw_data_len %zu chunk_size %d" , fw_data_len,
CHUNK_SIZE);
if ((fw_data_len % 4 ) != 0 ) {
wl1251_error("firmware length not multiple of four" );
return -EIO;
}
buf = kmalloc(CHUNK_SIZE, GFP_KERNEL);
if (!buf) {
wl1251_error("allocation for firmware upload chunk failed" );
return -ENOMEM;
}
wl1251_set_partition(wl, WL1251_PART_DOWN_MEM_START,
WL1251_PART_DOWN_MEM_SIZE,
WL1251_PART_DOWN_REG_START,
WL1251_PART_DOWN_REG_SIZE);
/* 10.1 set partition limit and chunk num */
chunk_num = 0 ;
partition_limit = WL1251_PART_DOWN_MEM_SIZE;
while (chunk_num < fw_data_len / CHUNK_SIZE) {
/* 10.2 update partition, if needed */
addr = WL1251_PART_DOWN_MEM_START +
(chunk_num + 2 ) * CHUNK_SIZE;
if (addr > partition_limit) {
addr = WL1251_PART_DOWN_MEM_START +
chunk_num * CHUNK_SIZE;
partition_limit = chunk_num * CHUNK_SIZE +
WL1251_PART_DOWN_MEM_SIZE;
wl1251_set_partition(wl,
addr,
WL1251_PART_DOWN_MEM_SIZE,
WL1251_PART_DOWN_REG_START,
WL1251_PART_DOWN_REG_SIZE);
}
/* 10.3 upload the chunk */
addr = WL1251_PART_DOWN_MEM_START + chunk_num * CHUNK_SIZE;
p = wl->fw + FW_HDR_SIZE + chunk_num * CHUNK_SIZE;
wl1251_debug(DEBUG_BOOT, "uploading fw chunk 0x%p to 0x%x" ,
p, addr);
/* need to copy the chunk for dma */
len = CHUNK_SIZE;
memcpy(buf, p, len);
wl1251_mem_write(wl, addr, buf, len);
chunk_num++;
}
/* 10.4 upload the last chunk */
addr = WL1251_PART_DOWN_MEM_START + chunk_num * CHUNK_SIZE;
p = wl->fw + FW_HDR_SIZE + chunk_num * CHUNK_SIZE;
/* need to copy the chunk for dma */
len = fw_data_len % CHUNK_SIZE;
memcpy(buf, p, len);
wl1251_debug(DEBUG_BOOT, "uploading fw last chunk (%zu B) 0x%p to 0x%x" ,
len, p, addr);
wl1251_mem_write(wl, addr, buf, len);
kfree(buf);
return 0 ;
}
static int wl1251_boot_upload_nvs(struct wl1251 *wl)
{
size_t nvs_len, nvs_bytes_written, burst_len;
int nvs_start, i;
u32 dest_addr, val;
u8 *nvs_ptr, *nvs;
nvs = wl->nvs;
if (nvs == NULL)
return -ENODEV;
nvs_ptr = nvs;
nvs_len = wl->nvs_len;
nvs_start = wl->fw_len;
/*
* 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 .
*/
while (nvs_ptr[0 ]) {
burst_len = nvs_ptr[0 ];
dest_addr = (nvs_ptr[1 ] & 0 xfe) | ((u32)(nvs_ptr[2 ] << 8 ));
/* 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 ));
wl1251_debug(DEBUG_BOOT,
"nvs burst write 0x%x: 0x%x" ,
dest_addr, val);
wl1251_mem_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 );
/* Now we must set the partition correctly */
wl1251_set_partition(wl, nvs_start,
WL1251_PART_DOWN_MEM_SIZE,
WL1251_PART_DOWN_REG_START,
WL1251_PART_DOWN_REG_SIZE);
/* And finally we upload the NVS tables */
nvs_bytes_written = 0 ;
while (nvs_bytes_written < nvs_len) {
val = (nvs_ptr[0 ] | (nvs_ptr[1 ] << 8 )
| (nvs_ptr[2 ] << 16 ) | (nvs_ptr[3 ] << 24 ));
wl1251_debug(DEBUG_BOOT,
"nvs write table 0x%x: 0x%x" ,
nvs_start, val);
wl1251_mem_write32(wl, nvs_start, val);
nvs_ptr += 4 ;
nvs_bytes_written += 4 ;
nvs_start += 4 ;
}
return 0 ;
}
int wl1251_boot(struct wl1251 *wl)
{
int ret = 0 , minor_minor_e2_ver;
u32 tmp, boot_data;
/* halt embedded ARM CPU while loading firmware */
wl1251_reg_write32(wl, ACX_REG_ECPU_CONTROL, ECPU_CONTROL_HALT);
ret = wl1251_boot_soft_reset(wl);
if (ret < 0 )
goto out;
/* 2. start processing NVS file */
if (wl->use_eeprom) {
wl1251_reg_write32(wl, ACX_REG_EE_START, START_EEPROM_MGR);
/* Wait for EEPROM NVS burst read to complete */
msleep(40 );
wl1251_reg_write32(wl, ACX_EEPROMLESS_IND_REG, USE_EEPROM);
} else {
ret = wl1251_boot_upload_nvs(wl);
if (ret < 0 )
goto out;
/* write firmware's last address (ie. it's length) to
* ACX_EEPROMLESS_IND_REG */
wl1251_reg_write32(wl, ACX_EEPROMLESS_IND_REG, wl->fw_len);
}
/* 6. read the EEPROM parameters */
tmp = wl1251_reg_read32(wl, SCR_PAD2);
/* 7. read bootdata */
wl->boot_attr.radio_type = (tmp & 0 x0000FF00) >> 8 ;
wl->boot_attr.major = (tmp & 0 x00FF0000) >> 16 ;
tmp = wl1251_reg_read32(wl, SCR_PAD3);
/* 8. check bootdata and call restart sequence */
wl->boot_attr.minor = (tmp & 0 x00FF0000) >> 16 ;
minor_minor_e2_ver = (tmp & 0 xFF000000) >> 24 ;
wl1251_debug(DEBUG_BOOT, "radioType 0x%x majorE2Ver 0x%x "
"minorE2Ver 0x%x minor_minor_e2_ver 0x%x" ,
wl->boot_attr.radio_type, wl->boot_attr.major,
wl->boot_attr.minor, minor_minor_e2_ver);
ret = wl1251_boot_init_seq(wl);
if (ret < 0 )
goto out;
/* 9. NVS processing done */
boot_data = wl1251_reg_read32(wl, ACX_REG_ECPU_CONTROL);
wl1251_debug(DEBUG_BOOT, "halt boot_data 0x%x" , boot_data);
/* 10. check that ECPU_CONTROL_HALT bits are set in
* pWhalBus - > uBootData and start uploading firmware
*/
if ((boot_data & ECPU_CONTROL_HALT) == 0 ) {
wl1251_error("boot failed, ECPU_CONTROL_HALT not set" );
ret = -EIO;
goto out;
}
ret = wl1251_boot_upload_firmware(wl);
if (ret < 0 )
goto out;
/* 10.5 start firmware */
ret = wl1251_boot_run_firmware(wl);
if (ret < 0 )
goto out;
out:
return ret;
}
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