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/*
* carl9170 firmware - used by the ar9170 wireless device
*
* Copyright (c) 2000-2005 ZyDAS Technology Corporation
* Copyright (c) 2007-2009 Atheros Communications, Inc.
* Copyright 2009 Johannes Berg <johannes@sipsolutions.net>
* Copyright 2009-2011 Christian Lamparter <chunkeey@googlemail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* 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 Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "carl9170.h"
#include "shared/phy.h"
#include "hostif.h"
#include "printf.h"
#include "timer.h"
#include "rom.h"
#include "wl.h"
#include "wol.h"
#ifdef CONFIG_CARL9170FW_DEBUG_USB
void usb_putc(const char c)
{
fw.usb.put_buffer[fw.usb.put_index++] = (uint8_t) c;
if (fw.usb.put_index == CARL9170_MAX_CMD_PAYLOAD_LEN || c == '\0') {
fw.usb.put_buffer[fw.usb.put_index] = 0;
send_cmd_to_host(__roundup(fw.usb.put_index, 4),
CARL9170_RSP_TEXT, fw.usb.put_index,
fw.usb.put_buffer);
fw.usb.put_index = 0;
}
}
void usb_print_hex_dump(const void *buf, int len)
{
unsigned int offset = 0, block = 0;
while (len > 0) {
block = min(__roundup(len, 4), CARL9170_MAX_CMD_PAYLOAD_LEN);
send_cmd_to_host(block, CARL9170_RSP_HEXDUMP, len,
(const uint8_t *) buf + offset);
offset += block;
len -= block;
}
}
#endif /* CONFIG_CARL9170FW_DEBUG_USB */
/* grab a buffer from the interrupt in queue ring-buffer */
static struct carl9170_rsp *get_int_buf(void)
{
struct carl9170_rsp *tmp;
/* fetch the _oldest_ buffer from the ring */
tmp = &fw.usb.int_buf[fw.usb.int_tail_index];
/* assign a unique sequence for every response/trap */
tmp->hdr.seq = fw.usb.int_tail_index;
fw.usb.int_tail_index++;
fw.usb.int_tail_index %= CARL9170_INT_RQ_CACHES;
if (fw.usb.int_pending != CARL9170_INT_RQ_CACHES)
fw.usb.int_pending++;
return tmp;
}
/* Pop up data from Interrupt IN Queue to USB Response buffer */
static struct carl9170_rsp *dequeue_int_buf(unsigned int space)
{
struct carl9170_rsp *tmp = NULL;
if (fw.usb.int_pending > 0) {
tmp = &fw.usb.int_buf[fw.usb.int_head_index];
if ((unsigned int)(tmp->hdr.len + 8) > space)
return NULL;
fw.usb.int_head_index++;
fw.usb.int_head_index %= CARL9170_INT_RQ_CACHES;
fw.usb.int_pending--;
}
return tmp;
}
static void usb_data_in(void)
{
}
static void usb_reg_out(void)
{
uint32_t *regaddr = (uint32_t *) &dma_mem.reserved.cmd;
uint16_t usbfifolen, i;
usb_reset_out();
usbfifolen = getb(AR9170_USB_REG_EP4_BYTE_COUNT_LOW) |
getb(AR9170_USB_REG_EP4_BYTE_COUNT_HIGH) << 8;
if (usbfifolen & 0x3)
usbfifolen = (usbfifolen >> 2) + 1;
else
usbfifolen = usbfifolen >> 2;
for (i = 0; i < usbfifolen; i++)
*regaddr++ = get(AR9170_USB_REG_EP4_DATA);
handle_cmd(get_int_buf());
usb_trigger_in();
}
static void usb_status_in(void)
{
struct carl9170_rsp *rsp;
unsigned int rem, tlen, elen;
if (!fw.usb.int_desc_available)
return ;
fw.usb.int_desc_available = 0;
rem = AR9170_BLOCK_SIZE - AR9170_INT_MAGIC_HEADER_SIZE;
tlen = AR9170_INT_MAGIC_HEADER_SIZE;
usb_reset_in();
while (fw.usb.int_pending) {
rsp = dequeue_int_buf(rem);
if (!rsp)
break;
elen = rsp->hdr.len + 4;
memcpy(DESC_PAYLOAD_OFF(fw.usb.int_desc, tlen), rsp, elen);
rem -= elen;
tlen += elen;
}
if (tlen == AR9170_INT_MAGIC_HEADER_SIZE) {
DBG("attempted to send an empty int response!\n");
goto reclaim;
}
fw.usb.int_desc->ctrl = AR9170_CTRL_FS_BIT | AR9170_CTRL_LS_BIT;
fw.usb.int_desc->totalLen = tlen;
fw.usb.int_desc->dataSize = tlen;
/* Put to UpQ */
dma_put(&fw.pta.up_queue, fw.usb.int_desc);
/* Trigger PTA UP DMA */
set(AR9170_PTA_REG_UP_DMA_TRIGGER, 1);
usb_trigger_out();
return ;
reclaim:
/* TODO: not sure what to do here */
fw.usb.int_desc_available = 1;
}
void send_cmd_to_host(const uint8_t len, const uint8_t type,
const uint8_t ext, const uint8_t *body)
{
struct carl9170_cmd *resp;
#ifdef CONFIG_CARL9170FW_DEBUG
if (unlikely(len > sizeof(resp->data))) {
DBG("CMD too long:%x %d\n", type, len);
return ;
}
/* Element length must be a multiple of 4. */
if (unlikely(len & 0x3)) {
DBG("CMD length not mult. of 4:%x %d\n", type, len);
return ;
}
#endif /* CONFIG_CARL9170FW_DEBUG */
resp = (struct carl9170_cmd *) get_int_buf();
if (unlikely(resp == NULL)) {
/* not very helpful for NON UART users */
DBG("out of msg buffers\n");
return ;
}
resp->hdr.len = len;
resp->hdr.cmd = type;
resp->hdr.ext = ext;
memcpy(resp->data, body, len);
usb_trigger_in();
}
/* Turn off ADDA/RF power, PLL */
static void turn_power_off(void)
{
set(AR9170_PHY_REG_ACTIVE, AR9170_PHY_ACTIVE_DIS);
set(AR9170_PHY_REG_ADC_CTL, 0xa0000000 |
AR9170_PHY_ADC_CTL_OFF_PWDADC | AR9170_PHY_ADC_CTL_OFF_PWDDAC);
/* This will also turn-off the LEDs */
set(AR9170_GPIO_REG_PORT_DATA, 0);
set(AR9170_GPIO_REG_PORT_TYPE, 0xf);
set(AR9170_PWR_REG_BASE, 0x40021);
set(AR9170_MAC_REG_DMA_TRIGGER, 0);
andl(AR9170_USB_REG_DMA_CTL, ~(AR9170_USB_DMA_CTL_ENABLE_TO_DEVICE |
AR9170_USB_DMA_CTL_ENABLE_FROM_DEVICE |
AR9170_USB_DMA_CTL_UP_PACKET_MODE |
AR9170_USB_DMA_CTL_DOWN_STREAM));
/* Do a software reset to PTA component */
orl(AR9170_PTA_REG_DMA_MODE_CTRL, AR9170_PTA_DMA_MODE_CTRL_RESET);
andl(AR9170_PTA_REG_DMA_MODE_CTRL, ~AR9170_PTA_DMA_MODE_CTRL_RESET);
orl(AR9170_PTA_REG_DMA_MODE_CTRL, AR9170_PTA_DMA_MODE_CTRL_DISABLE_USB);
set(AR9170_MAC_REG_POWER_STATE_CTRL,
AR9170_MAC_POWER_STATE_CTRL_RESET);
/* Reset USB FIFO */
set(AR9170_PWR_REG_RESET, AR9170_PWR_RESET_COMMIT_RESET_MASK |
AR9170_PWR_RESET_DMA_MASK |
AR9170_PWR_RESET_WLAN_MASK);
set(AR9170_PWR_REG_RESET, 0x0);
clock_set(AHB_20_22MHZ, false);
set(AR9170_PWR_REG_PLL_ADDAC, 0x5163); /* 0x502b; */
set(AR9170_PHY_REG_ADC_SERIAL_CTL, AR9170_PHY_ADC_SCTL_SEL_EXTERNAL_RADIO);
set(0x1c589c, 0); /* 7-0 */
set(0x1c589c, 0); /* 15-8 */
set(0x1c589c, 0); /* 23-16 */
set(0x1c589c, 0); /* 31- */
set(0x1c589c, 0); /* 39- */
set(0x1c589c, 0); /* 47- */
set(0x1c589c, 0); /* 55- */
set(0x1c589c, 0xf8); /* 63- */
set(0x1c589c, 0x27); /* 0x24; 71- modified */
set(0x1c589c, 0xf9); /* 79- */
set(0x1c589c, 0x90); /* 87- */
set(0x1c589c, 0x04); /* 95- */
set(0x1c589c, 0x48); /* 103- */
set(0x1c589c, 0x19); /* 0; 111- modified */
set(0x1c589c, 0); /* 119- */
set(0x1c589c, 0); /* 127- */
set(0x1c589c, 0); /* 135- */
set(0x1c589c, 0); /* 143- */
set(0x1c589c, 0); /* 151- */
set(0x1c589c, 0x70); /* 159- */
set(0x1c589c, 0x0c); /* 167- */
set(0x1c589c, 0); /* 175- */
set(0x1c589c, 0); /* 183-176 */
set(0x1c589c, 0); /* 191-184 */
set(0x1c589c, 0); /* 199- */
set(0x1c589c, 0); /* 207- */
set(0x1c589c, 0); /* 215- */
set(0x1c589c, 0); /* 223- */
set(0x1c589c, 0); /* 231- */
set(0x1c58c4, 0); /* 233- 232 */
set(AR9170_PHY_REG_ADC_SERIAL_CTL, AR9170_PHY_ADC_SCTL_SEL_INTERNAL_ADDAC);
}
static void disable_watchdog(void)
{
if (!fw.watchdog_enable)
return;
/* write watchdog magic pattern for suspend */
andl(AR9170_PWR_REG_WATCH_DOG_MAGIC, 0xffff);
orl(AR9170_PWR_REG_WATCH_DOG_MAGIC, 0x98760000);
/* Disable watchdog */
set(AR9170_TIMER_REG_WATCH_DOG, 0xffff);
}
void __noreturn reboot(void)
{
disable_watchdog();
/* Turn off power */
turn_power_off();
/* clean bootloader workspace */
memset(&dma_mem, 0, sizeof(dma_mem));
/* add by ygwei for work around USB PHY chirp sequence problem */
set(0x10f100, 0x12345678);
/* Jump to boot code */
jump_to_bootcode();
}
/* service USB events and re-enable USB interrupt */
static void usb_handler(uint8_t usb_interrupt_level1)
{
uint8_t usb_interrupt_level2;
if (usb_interrupt_level1 & BIT(5))
usb_data_in();
if (usb_interrupt_level1 & BIT(4))
usb_reg_out();
if (usb_interrupt_level1 & BIT(6))
usb_status_in();
if (usb_interrupt_level1 & BIT(0)) {
usb_interrupt_level2 = getb(AR9170_USB_REG_INTR_SOURCE_0);
if (usb_interrupt_level2 & AR9170_USB_INTR_SRC0_SETUP)
usb_ep0setup();
if (usb_interrupt_level2 & AR9170_USB_INTR_SRC0_IN)
usb_ep0tx();
if (usb_interrupt_level2 & AR9170_USB_INTR_SRC0_OUT)
usb_ep0rx();
if (usb_interrupt_level2 & AR9170_USB_INTR_SRC0_ABORT) {
/* Clear the command abort interrupt */
andb(AR9170_USB_REG_INTR_SOURCE_0, (uint8_t)
~AR9170_USB_INTR_SRC0_ABORT);
}
if (usb_interrupt_level2 & AR9170_USB_INTR_SRC0_FAIL ||
fw.usb.ep0_action & CARL9170_EP0_STALL) {
/*
* transmission failure.
* stall ep 0
*/
setb(AR9170_USB_REG_CX_CONFIG_STATUS, BIT(2));
fw.usb.ep0_action &= ~CARL9170_EP0_STALL;
}
if (usb_interrupt_level2 & AR9170_USB_INTR_SRC0_END ||
fw.usb.ep0_action & CARL9170_EP0_TRIGGER) {
/*
* transmission done.
* set DONE bit.
*/
setb(AR9170_USB_REG_CX_CONFIG_STATUS, BIT(0));
fw.usb.ep0_action &= ~CARL9170_EP0_TRIGGER;
}
}
if (usb_interrupt_level1 & BIT(7)) {
usb_interrupt_level2 = getb(AR9170_USB_REG_INTR_SOURCE_7);
if (usb_interrupt_level2 & AR9170_USB_INTR_SRC7_RX0BYTE)
usb_data_out0Byte();
if (usb_interrupt_level2 & AR9170_USB_INTR_SRC7_TX0BYTE)
usb_data_in0Byte();
if (usb_interrupt_level2 & AR9170_USB_INTR_SRC7_USB_RESET) {
usb_reset_ack();
reboot();
}
if (usb_interrupt_level2 & AR9170_USB_INTR_SRC7_USB_SUSPEND) {
usb_suspend_ack();
fw.suspend_mode = CARL9170_HOST_SUSPENDED;
#ifdef CONFIG_CARL9170FW_WOL
if (!(fw.usb.device_feature & USB_DEVICE_REMOTE_WAKEUP) ||
!fw.wol.cmd.flags) {
disable_watchdog();
/* GO_TO_SUSPEND stops the CPU clock too. */
orb(AR9170_USB_REG_MAIN_CTRL, AR9170_USB_MAIN_CTRL_GO_TO_SUSPEND);
} else {
wol_prepare();
}
#else /* CONFIG_CARL9170FW_WOL */
disable_watchdog();
/* GO_TO_SUSPEND stops the CPU clock too. */
orb(AR9170_USB_REG_MAIN_CTRL, AR9170_USB_MAIN_CTRL_GO_TO_SUSPEND);
#endif /* CONFIG_CARL9170FW_WOL */
}
if (usb_interrupt_level2 & AR9170_USB_INTR_SRC7_USB_RESUME) {
usb_resume_ack();
fw.suspend_mode = CARL9170_HOST_AWAKE;
set(AR9170_USB_REG_WAKE_UP, 0);
reboot();
}
}
}
void handle_usb(void)
{
uint8_t usb_interrupt_level1;
usb_interrupt_level1 = getb(AR9170_USB_REG_INTR_GROUP);
if (usb_interrupt_level1)
usb_handler(usb_interrupt_level1);
if (fw.usb.int_pending > 0)
usb_trigger_in();
}
void usb_timer(void)
{
}
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