diff options
Diffstat (limited to 'carl9170fw/carlfw/usb/main.c')
| -rw-r--r-- | carl9170fw/carlfw/usb/main.c | 432 |
1 files changed, 432 insertions, 0 deletions
diff --git a/carl9170fw/carlfw/usb/main.c b/carl9170fw/carlfw/usb/main.c new file mode 100644 index 0000000..890970c --- /dev/null +++ b/carl9170fw/carlfw/usb/main.c @@ -0,0 +1,432 @@ +/* + * 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) +{ +} |