/* Copyright (C) 2009 Ivo van Doorn Copyright (C) 2009 Alban Browaeys Copyright (C) 2009 Felix Fietkau Copyright (C) 2009 Luis Correia Copyright (C) 2009 Mattias Nissler Copyright (C) 2009 Mark Asselstine Copyright (C) 2009 Xose Vazquez Perez Copyright (C) 2009 Bart Zolnierkiewicz 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ /* Module: rt2800pci Abstract: rt2800pci device specific routines. Supported chipsets: RT2800E & RT2800ED. */ #include #include #include #include #include #include #include #include #include #include "rt2x00.h" #include "rt2x00pci.h" #include "rt2x00soc.h" #include "rt2800lib.h" #include "rt2800.h" #include "rt2800pci.h" /* * Allow hardware encryption to be disabled. */ static int modparam_nohwcrypt = 0; module_param_named(nohwcrypt, modparam_nohwcrypt, bool, S_IRUGO); MODULE_PARM_DESC(nohwcrypt, "Disable hardware encryption."); static void rt2800pci_mcu_status(struct rt2x00_dev *rt2x00dev, const u8 token) { unsigned int i; u32 reg; /* * SOC devices don't support MCU requests. */ if (rt2x00_is_soc(rt2x00dev)) return; for (i = 0; i < 200; i++) { rt2800_register_read(rt2x00dev, H2M_MAILBOX_CID, ®); if ((rt2x00_get_field32(reg, H2M_MAILBOX_CID_CMD0) == token) || (rt2x00_get_field32(reg, H2M_MAILBOX_CID_CMD1) == token) || (rt2x00_get_field32(reg, H2M_MAILBOX_CID_CMD2) == token) || (rt2x00_get_field32(reg, H2M_MAILBOX_CID_CMD3) == token)) break; udelay(REGISTER_BUSY_DELAY); } if (i == 200) ERROR(rt2x00dev, "MCU request failed, no response from hardware\n"); rt2800_register_write(rt2x00dev, H2M_MAILBOX_STATUS, ~0); rt2800_register_write(rt2x00dev, H2M_MAILBOX_CID, ~0); } #ifdef CONFIG_RT2800PCI_SOC static void rt2800pci_read_eeprom_soc(struct rt2x00_dev *rt2x00dev) { u32 *base_addr = (u32 *) KSEG1ADDR(0x1F040000); /* XXX for RT3052 */ memcpy_fromio(rt2x00dev->eeprom, base_addr, EEPROM_SIZE); } #else static inline void rt2800pci_read_eeprom_soc(struct rt2x00_dev *rt2x00dev) { } #endif /* CONFIG_RT2800PCI_SOC */ #ifdef CONFIG_RT2800PCI_PCI static void rt2800pci_eepromregister_read(struct eeprom_93cx6 *eeprom) { struct rt2x00_dev *rt2x00dev = eeprom->data; u32 reg; rt2800_register_read(rt2x00dev, E2PROM_CSR, ®); eeprom->reg_data_in = !!rt2x00_get_field32(reg, E2PROM_CSR_DATA_IN); eeprom->reg_data_out = !!rt2x00_get_field32(reg, E2PROM_CSR_DATA_OUT); eeprom->reg_data_clock = !!rt2x00_get_field32(reg, E2PROM_CSR_DATA_CLOCK); eeprom->reg_chip_select = !!rt2x00_get_field32(reg, E2PROM_CSR_CHIP_SELECT); } static void rt2800pci_eepromregister_write(struct eeprom_93cx6 *eeprom) { struct rt2x00_dev *rt2x00dev = eeprom->data; u32 reg = 0; rt2x00_set_field32(®, E2PROM_CSR_DATA_IN, !!eeprom->reg_data_in); rt2x00_set_field32(®, E2PROM_CSR_DATA_OUT, !!eeprom->reg_data_out); rt2x00_set_field32(®, E2PROM_CSR_DATA_CLOCK, !!eeprom->reg_data_clock); rt2x00_set_field32(®, E2PROM_CSR_CHIP_SELECT, !!eeprom->reg_chip_select); rt2800_register_write(rt2x00dev, E2PROM_CSR, reg); } static void rt2800pci_read_eeprom_pci(struct rt2x00_dev *rt2x00dev) { struct eeprom_93cx6 eeprom; u32 reg; rt2800_register_read(rt2x00dev, E2PROM_CSR, ®); eeprom.data = rt2x00dev; eeprom.register_read = rt2800pci_eepromregister_read; eeprom.register_write = rt2800pci_eepromregister_write; switch (rt2x00_get_field32(reg, E2PROM_CSR_TYPE)) { case 0: eeprom.width = PCI_EEPROM_WIDTH_93C46; break; case 1: eeprom.width = PCI_EEPROM_WIDTH_93C66; break; default: eeprom.width = PCI_EEPROM_WIDTH_93C86; break; } eeprom.reg_data_in = 0; eeprom.reg_data_out = 0; eeprom.reg_data_clock = 0; eeprom.reg_chip_select = 0; eeprom_93cx6_multiread(&eeprom, EEPROM_BASE, rt2x00dev->eeprom, EEPROM_SIZE / sizeof(u16)); } static int rt2800pci_efuse_detect(struct rt2x00_dev *rt2x00dev) { return rt2800_efuse_detect(rt2x00dev); } static inline void rt2800pci_read_eeprom_efuse(struct rt2x00_dev *rt2x00dev) { rt2800_read_eeprom_efuse(rt2x00dev); } #else static inline void rt2800pci_read_eeprom_pci(struct rt2x00_dev *rt2x00dev) { } static inline int rt2800pci_efuse_detect(struct rt2x00_dev *rt2x00dev) { return 0; } static inline void rt2800pci_read_eeprom_efuse(struct rt2x00_dev *rt2x00dev) { } #endif /* CONFIG_RT2800PCI_PCI */ /* * Firmware functions */ static char *rt2800pci_get_firmware_name(struct rt2x00_dev *rt2x00dev) { return FIRMWARE_RT2860; } static int rt2800pci_check_firmware(struct rt2x00_dev *rt2x00dev, const u8 *data, const size_t len) { u16 fw_crc; u16 crc; /* * Only support 8kb firmware files. */ if (len != 8192) return FW_BAD_LENGTH; /* * The last 2 bytes in the firmware array are the crc checksum itself, * this means that we should never pass those 2 bytes to the crc * algorithm. */ fw_crc = (data[len - 2] << 8 | data[len - 1]); /* * Use the crc ccitt algorithm. * This will return the same value as the legacy driver which * used bit ordering reversion on the both the firmware bytes * before input input as well as on the final output. * Obviously using crc ccitt directly is much more efficient. */ crc = crc_ccitt(~0, data, len - 2); /* * There is a small difference between the crc-itu-t + bitrev and * the crc-ccitt crc calculation. In the latter method the 2 bytes * will be swapped, use swab16 to convert the crc to the correct * value. */ crc = swab16(crc); return (fw_crc == crc) ? FW_OK : FW_BAD_CRC; } static int rt2800pci_load_firmware(struct rt2x00_dev *rt2x00dev, const u8 *data, const size_t len) { unsigned int i; u32 reg; /* * Wait for stable hardware. */ for (i = 0; i < REGISTER_BUSY_COUNT; i++) { rt2800_register_read(rt2x00dev, MAC_CSR0, ®); if (reg && reg != ~0) break; msleep(1); } if (i == REGISTER_BUSY_COUNT) { ERROR(rt2x00dev, "Unstable hardware.\n"); return -EBUSY; } rt2800_register_write(rt2x00dev, PWR_PIN_CFG, 0x00000002); rt2800_register_write(rt2x00dev, AUTOWAKEUP_CFG, 0x00000000); /* * Disable DMA, will be reenabled later when enabling * the radio. */ rt2800_register_read(rt2x00dev, WPDMA_GLO_CFG, ®); rt2x00_set_field32(®, WPDMA_GLO_CFG_ENABLE_TX_DMA, 0); rt2x00_set_field32(®, WPDMA_GLO_CFG_TX_DMA_BUSY, 0); rt2x00_set_field32(®, WPDMA_GLO_CFG_ENABLE_RX_DMA, 0); rt2x00_set_field32(®, WPDMA_GLO_CFG_RX_DMA_BUSY, 0); rt2x00_set_field32(®, WPDMA_GLO_CFG_TX_WRITEBACK_DONE, 1); rt2800_register_write(rt2x00dev, WPDMA_GLO_CFG, reg); /* * enable Host program ram write selection */ reg = 0; rt2x00_set_field32(®, PBF_SYS_CTRL_HOST_RAM_WRITE, 1); rt2800_register_write(rt2x00dev, PBF_SYS_CTRL, reg); /* * Write firmware to device. */ rt2800_register_multiwrite(rt2x00dev, FIRMWARE_IMAGE_BASE, data, len); rt2800_register_write(rt2x00dev, PBF_SYS_CTRL, 0x00000); rt2800_register_write(rt2x00dev, PBF_SYS_CTRL, 0x00001); /* * Wait for device to stabilize. */ for (i = 0; i < REGISTER_BUSY_COUNT; i++) { rt2800_register_read(rt2x00dev, PBF_SYS_CTRL, ®); if (rt2x00_get_field32(reg, PBF_SYS_CTRL_READY)) break; msleep(1); } if (i == REGISTER_BUSY_COUNT) { ERROR(rt2x00dev, "PBF system register not ready.\n"); return -EBUSY; } /* * Disable interrupts */ rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_RADIO_IRQ_OFF); /* * Initialize BBP R/W access agent */ rt2800_register_write(rt2x00dev, H2M_BBP_AGENT, 0); rt2800_register_write(rt2x00dev, H2M_MAILBOX_CSR, 0); return 0; } /* * Initialization functions. */ static bool rt2800pci_get_entry_state(struct queue_entry *entry) { struct queue_entry_priv_pci *entry_priv = entry->priv_data; u32 word; if (entry->queue->qid == QID_RX) { rt2x00_desc_read(entry_priv->desc, 1, &word); return (!rt2x00_get_field32(word, RXD_W1_DMA_DONE)); } else { rt2x00_desc_read(entry_priv->desc, 1, &word); return (!rt2x00_get_field32(word, TXD_W1_DMA_DONE)); } } static void rt2800pci_clear_entry(struct queue_entry *entry) { struct queue_entry_priv_pci *entry_priv = entry->priv_data; struct skb_frame_desc *skbdesc = get_skb_frame_desc(entry->skb); u32 word; if (entry->queue->qid == QID_RX) { rt2x00_desc_read(entry_priv->desc, 0, &word); rt2x00_set_field32(&word, RXD_W0_SDP0, skbdesc->skb_dma); rt2x00_desc_write(entry_priv->desc, 0, word); rt2x00_desc_read(entry_priv->desc, 1, &word); rt2x00_set_field32(&word, RXD_W1_DMA_DONE, 0); rt2x00_desc_write(entry_priv->desc, 1, word); } else { rt2x00_desc_read(entry_priv->desc, 1, &word); rt2x00_set_field32(&word, TXD_W1_DMA_DONE, 1); rt2x00_desc_write(entry_priv->desc, 1, word); } } static int rt2800pci_init_queues(struct rt2x00_dev *rt2x00dev) { struct queue_entry_priv_pci *entry_priv; u32 reg; /* * Initialize registers. */ entry_priv = rt2x00dev->tx[0].entries[0].priv_data; rt2800_register_write(rt2x00dev, TX_BASE_PTR0, entry_priv->desc_dma); rt2800_register_write(rt2x00dev, TX_MAX_CNT0, rt2x00dev->tx[0].limit); rt2800_register_write(rt2x00dev, TX_CTX_IDX0, 0); rt2800_register_write(rt2x00dev, TX_DTX_IDX0, 0); entry_priv = rt2x00dev->tx[1].entries[0].priv_data; rt2800_register_write(rt2x00dev, TX_BASE_PTR1, entry_priv->desc_dma); rt2800_register_write(rt2x00dev, TX_MAX_CNT1, rt2x00dev->tx[1].limit); rt2800_register_write(rt2x00dev, TX_CTX_IDX1, 0); rt2800_register_write(rt2x00dev, TX_DTX_IDX1, 0); entry_priv = rt2x00dev->tx[2].entries[0].priv_data; rt2800_register_write(rt2x00dev, TX_BASE_PTR2, entry_priv->desc_dma); rt2800_register_write(rt2x00dev, TX_MAX_CNT2, rt2x00dev->tx[2].limit); rt2800_register_write(rt2x00dev, TX_CTX_IDX2, 0); rt2800_register_write(rt2x00dev, TX_DTX_IDX2, 0); entry_priv = rt2x00dev->tx[3].entries[0].priv_data; rt2800_register_write(rt2x00dev, TX_BASE_PTR3, entry_priv->desc_dma); rt2800_register_write(rt2x00dev, TX_MAX_CNT3, rt2x00dev->tx[3].limit); rt2800_register_write(rt2x00dev, TX_CTX_IDX3, 0); rt2800_register_write(rt2x00dev, TX_DTX_IDX3, 0); entry_priv = rt2x00dev->rx->entries[0].priv_data; rt2800_register_write(rt2x00dev, RX_BASE_PTR, entry_priv->desc_dma); rt2800_register_write(rt2x00dev, RX_MAX_CNT, rt2x00dev->rx[0].limit); rt2800_register_write(rt2x00dev, RX_CRX_IDX, rt2x00dev->rx[0].limit - 1); rt2800_register_write(rt2x00dev, RX_DRX_IDX, 0); /* * Enable global DMA configuration */ rt2800_register_read(rt2x00dev, WPDMA_GLO_CFG, ®); rt2x00_set_field32(®, WPDMA_GLO_CFG_ENABLE_TX_DMA, 0); rt2x00_set_field32(®, WPDMA_GLO_CFG_ENABLE_RX_DMA, 0); rt2x00_set_field32(®, WPDMA_GLO_CFG_TX_WRITEBACK_DONE, 1); rt2800_register_write(rt2x00dev, WPDMA_GLO_CFG, reg); rt2800_register_write(rt2x00dev, DELAY_INT_CFG, 0); return 0; } /* * Device state switch handlers. */ static void rt2800pci_toggle_rx(struct rt2x00_dev *rt2x00dev, enum dev_state state) { u32 reg; rt2800_register_read(rt2x00dev, MAC_SYS_CTRL, ®); rt2x00_set_field32(®, MAC_SYS_CTRL_ENABLE_RX, (state == STATE_RADIO_RX_ON) || (state == STATE_RADIO_RX_ON_LINK)); rt2800_register_write(rt2x00dev, MAC_SYS_CTRL, reg); } static void rt2800pci_toggle_irq(struct rt2x00_dev *rt2x00dev, enum dev_state state) { int mask = (state == STATE_RADIO_IRQ_ON) || (state == STATE_RADIO_IRQ_ON_ISR); u32 reg; /* * When interrupts are being enabled, the interrupt registers * should clear the register to assure a clean state. */ if (state == STATE_RADIO_IRQ_ON) { rt2800_register_read(rt2x00dev, INT_SOURCE_CSR, ®); rt2800_register_write(rt2x00dev, INT_SOURCE_CSR, reg); } rt2800_register_read(rt2x00dev, INT_MASK_CSR, ®); rt2x00_set_field32(®, INT_MASK_CSR_RXDELAYINT, mask); rt2x00_set_field32(®, INT_MASK_CSR_TXDELAYINT, mask); rt2x00_set_field32(®, INT_MASK_CSR_RX_DONE, mask); rt2x00_set_field32(®, INT_MASK_CSR_AC0_DMA_DONE, mask); rt2x00_set_field32(®, INT_MASK_CSR_AC1_DMA_DONE, mask); rt2x00_set_field32(®, INT_MASK_CSR_AC2_DMA_DONE, mask); rt2x00_set_field32(®, INT_MASK_CSR_AC3_DMA_DONE, mask); rt2x00_set_field32(®, INT_MASK_CSR_HCCA_DMA_DONE, mask); rt2x00_set_field32(®, INT_MASK_CSR_MGMT_DMA_DONE, mask); rt2x00_set_field32(®, INT_MASK_CSR_MCU_COMMAND, mask); rt2x00_set_field32(®, INT_MASK_CSR_RXTX_COHERENT, mask); rt2x00_set_field32(®, INT_MASK_CSR_TBTT, mask); rt2x00_set_field32(®, INT_MASK_CSR_PRE_TBTT, mask); rt2x00_set_field32(®, INT_MASK_CSR_TX_FIFO_STATUS, mask); rt2x00_set_field32(®, INT_MASK_CSR_AUTO_WAKEUP, mask); rt2x00_set_field32(®, INT_MASK_CSR_GPTIMER, mask); rt2x00_set_field32(®, INT_MASK_CSR_RX_COHERENT, mask); rt2x00_set_field32(®, INT_MASK_CSR_TX_COHERENT, mask); rt2800_register_write(rt2x00dev, INT_MASK_CSR, reg); } static int rt2800pci_init_registers(struct rt2x00_dev *rt2x00dev) { u32 reg; /* * Reset DMA indexes */ rt2800_register_read(rt2x00dev, WPDMA_RST_IDX, ®); rt2x00_set_field32(®, WPDMA_RST_IDX_DTX_IDX0, 1); rt2x00_set_field32(®, WPDMA_RST_IDX_DTX_IDX1, 1); rt2x00_set_field32(®, WPDMA_RST_IDX_DTX_IDX2, 1); rt2x00_set_field32(®, WPDMA_RST_IDX_DTX_IDX3, 1); rt2x00_set_field32(®, WPDMA_RST_IDX_DTX_IDX4, 1); rt2x00_set_field32(®, WPDMA_RST_IDX_DTX_IDX5, 1); rt2x00_set_field32(®, WPDMA_RST_IDX_DRX_IDX0, 1); rt2800_register_write(rt2x00dev, WPDMA_RST_IDX, reg); rt2800_register_write(rt2x00dev, PBF_SYS_CTRL, 0x00000e1f); rt2800_register_write(rt2x00dev, PBF_SYS_CTRL, 0x00000e00); rt2800_register_write(rt2x00dev, PWR_PIN_CFG, 0x00000003); rt2800_register_read(rt2x00dev, MAC_SYS_CTRL, ®); rt2x00_set_field32(®, MAC_SYS_CTRL_RESET_CSR, 1); rt2x00_set_field32(®, MAC_SYS_CTRL_RESET_BBP, 1); rt2800_register_write(rt2x00dev, MAC_SYS_CTRL, reg); rt2800_register_write(rt2x00dev, MAC_SYS_CTRL, 0x00000000); return 0; } static int rt2800pci_enable_radio(struct rt2x00_dev *rt2x00dev) { u32 reg; u16 word; /* * Initialize all registers. */ if (unlikely(rt2800_wait_wpdma_ready(rt2x00dev) || rt2800pci_init_queues(rt2x00dev) || rt2800_init_registers(rt2x00dev) || rt2800_wait_wpdma_ready(rt2x00dev) || rt2800_init_bbp(rt2x00dev) || rt2800_init_rfcsr(rt2x00dev))) return -EIO; /* * Send signal to firmware during boot time. */ rt2800_mcu_request(rt2x00dev, MCU_BOOT_SIGNAL, 0, 0, 0); /* * Enable RX. */ rt2800_register_read(rt2x00dev, MAC_SYS_CTRL, ®); rt2x00_set_field32(®, MAC_SYS_CTRL_ENABLE_TX, 1); rt2x00_set_field32(®, MAC_SYS_CTRL_ENABLE_RX, 0); rt2800_register_write(rt2x00dev, MAC_SYS_CTRL, reg); rt2800_register_read(rt2x00dev, WPDMA_GLO_CFG, ®); rt2x00_set_field32(®, WPDMA_GLO_CFG_ENABLE_TX_DMA, 1); rt2x00_set_field32(®, WPDMA_GLO_CFG_ENABLE_RX_DMA, 1); rt2x00_set_field32(®, WPDMA_GLO_CFG_WP_DMA_BURST_SIZE, 2); rt2x00_set_field32(®, WPDMA_GLO_CFG_TX_WRITEBACK_DONE, 1); rt2800_register_write(rt2x00dev, WPDMA_GLO_CFG, reg); rt2800_register_read(rt2x00dev, MAC_SYS_CTRL, ®); rt2x00_set_field32(®, MAC_SYS_CTRL_ENABLE_TX, 1); rt2x00_set_field32(®, MAC_SYS_CTRL_ENABLE_RX, 1); rt2800_register_write(rt2x00dev, MAC_SYS_CTRL, reg); /* * Initialize LED control */ rt2x00_eeprom_read(rt2x00dev, EEPROM_LED1, &word); rt2800_mcu_request(rt2x00dev, MCU_LED_1, 0xff, word & 0xff, (word >> 8) & 0xff); rt2x00_eeprom_read(rt2x00dev, EEPROM_LED2, &word); rt2800_mcu_request(rt2x00dev, MCU_LED_2, 0xff, word & 0xff, (word >> 8) & 0xff); rt2x00_eeprom_read(rt2x00dev, EEPROM_LED3, &word); rt2800_mcu_request(rt2x00dev, MCU_LED_3, 0xff, word & 0xff, (word >> 8) & 0xff); return 0; } static void rt2800pci_disable_radio(struct rt2x00_dev *rt2x00dev) { u32 reg; rt2800_register_read(rt2x00dev, WPDMA_GLO_CFG, ®); rt2x00_set_field32(®, WPDMA_GLO_CFG_ENABLE_TX_DMA, 0); rt2x00_set_field32(®, WPDMA_GLO_CFG_TX_DMA_BUSY, 0); rt2x00_set_field32(®, WPDMA_GLO_CFG_ENABLE_RX_DMA, 0); rt2x00_set_field32(®, WPDMA_GLO_CFG_RX_DMA_BUSY, 0); rt2x00_set_field32(®, WPDMA_GLO_CFG_TX_WRITEBACK_DONE, 1); rt2800_register_write(rt2x00dev, WPDMA_GLO_CFG, reg); rt2800_register_write(rt2x00dev, MAC_SYS_CTRL, 0); rt2800_register_write(rt2x00dev, PWR_PIN_CFG, 0); rt2800_register_write(rt2x00dev, TX_PIN_CFG, 0); rt2800_register_write(rt2x00dev, PBF_SYS_CTRL, 0x00001280); rt2800_register_read(rt2x00dev, WPDMA_RST_IDX, ®); rt2x00_set_field32(®, WPDMA_RST_IDX_DTX_IDX0, 1); rt2x00_set_field32(®, WPDMA_RST_IDX_DTX_IDX1, 1); rt2x00_set_field32(®, WPDMA_RST_IDX_DTX_IDX2, 1); rt2x00_set_field32(®, WPDMA_RST_IDX_DTX_IDX3, 1); rt2x00_set_field32(®, WPDMA_RST_IDX_DTX_IDX4, 1); rt2x00_set_field32(®, WPDMA_RST_IDX_DTX_IDX5, 1); rt2x00_set_field32(®, WPDMA_RST_IDX_DRX_IDX0, 1); rt2800_register_write(rt2x00dev, WPDMA_RST_IDX, reg); rt2800_register_write(rt2x00dev, PBF_SYS_CTRL, 0x00000e1f); rt2800_register_write(rt2x00dev, PBF_SYS_CTRL, 0x00000e00); /* Wait for DMA, ignore error */ rt2800_wait_wpdma_ready(rt2x00dev); } static int rt2800pci_set_state(struct rt2x00_dev *rt2x00dev, enum dev_state state) { /* * Always put the device to sleep (even when we intend to wakeup!) * if the device is booting and wasn't asleep it will return * failure when attempting to wakeup. */ rt2800_mcu_request(rt2x00dev, MCU_SLEEP, 0xff, 0, 2); if (state == STATE_AWAKE) { rt2800_mcu_request(rt2x00dev, MCU_WAKEUP, TOKEN_WAKUP, 0, 0); rt2800pci_mcu_status(rt2x00dev, TOKEN_WAKUP); } return 0; } static int rt2800pci_set_device_state(struct rt2x00_dev *rt2x00dev, enum dev_state state) { int retval = 0; switch (state) { case STATE_RADIO_ON: /* * Before the radio can be enabled, the device first has * to be woken up. After that it needs a bit of time * to be fully awake and then the radio can be enabled. */ rt2800pci_set_state(rt2x00dev, STATE_AWAKE); msleep(1); retval = rt2800pci_enable_radio(rt2x00dev); break; case STATE_RADIO_OFF: /* * After the radio has been disabled, the device should * be put to sleep for powersaving. */ rt2800pci_disable_radio(rt2x00dev); rt2800pci_set_state(rt2x00dev, STATE_SLEEP); break; case STATE_RADIO_RX_ON: case STATE_RADIO_RX_ON_LINK: case STATE_RADIO_RX_OFF: case STATE_RADIO_RX_OFF_LINK: rt2800pci_toggle_rx(rt2x00dev, state); break; case STATE_RADIO_IRQ_ON: case STATE_RADIO_IRQ_ON_ISR: case STATE_RADIO_IRQ_OFF: case STATE_RADIO_IRQ_OFF_ISR: rt2800pci_toggle_irq(rt2x00dev, state); break; case STATE_DEEP_SLEEP: case STATE_SLEEP: case STATE_STANDBY: case STATE_AWAKE: retval = rt2800pci_set_state(rt2x00dev, state); break; default: retval = -ENOTSUPP; break; } if (unlikely(retval)) ERROR(rt2x00dev, "Device failed to enter state %d (%d).\n", state, retval); return retval; } /* * TX descriptor initialization */ static void rt2800pci_write_tx_data(struct queue_entry* entry, struct txentry_desc *txdesc) { __le32 *txwi = (__le32 *) entry->skb->data; rt2800_write_txwi(txwi, txdesc); } static void rt2800pci_write_tx_desc(struct rt2x00_dev *rt2x00dev, struct sk_buff *skb, struct txentry_desc *txdesc) { struct skb_frame_desc *skbdesc = get_skb_frame_desc(skb); struct queue_entry_priv_pci *entry_priv = skbdesc->entry->priv_data; __le32 *txd = entry_priv->desc; u32 word; /* * The buffers pointed by SD_PTR0/SD_LEN0 and SD_PTR1/SD_LEN1 * must contains a TXWI structure + 802.11 header + padding + 802.11 * data. We choose to have SD_PTR0/SD_LEN0 only contains TXWI and * SD_PTR1/SD_LEN1 contains 802.11 header + padding + 802.11 * data. It means that LAST_SEC0 is always 0. */ /* * Initialize TX descriptor */ rt2x00_desc_read(txd, 0, &word); rt2x00_set_field32(&word, TXD_W0_SD_PTR0, skbdesc->skb_dma); rt2x00_desc_write(txd, 0, word); rt2x00_desc_read(txd, 1, &word); rt2x00_set_field32(&word, TXD_W1_SD_LEN1, skb->len); rt2x00_set_field32(&word, TXD_W1_LAST_SEC1, !test_bit(ENTRY_TXD_MORE_FRAG, &txdesc->flags)); rt2x00_set_field32(&word, TXD_W1_BURST, test_bit(ENTRY_TXD_BURST, &txdesc->flags)); rt2x00_set_field32(&word, TXD_W1_SD_LEN0, TXWI_DESC_SIZE); rt2x00_set_field32(&word, TXD_W1_LAST_SEC0, 0); rt2x00_set_field32(&word, TXD_W1_DMA_DONE, 0); rt2x00_desc_write(txd, 1, word); rt2x00_desc_read(txd, 2, &word); rt2x00_set_field32(&word, TXD_W2_SD_PTR1, skbdesc->skb_dma + TXWI_DESC_SIZE); rt2x00_desc_write(txd, 2, word); rt2x00_desc_read(txd, 3, &word); rt2x00_set_field32(&word, TXD_W3_WIV, !test_bit(ENTRY_TXD_ENCRYPT_IV, &txdesc->flags)); rt2x00_set_field32(&word, TXD_W3_QSEL, 2); rt2x00_desc_write(txd, 3, word); /* * Register descriptor details in skb frame descriptor. */ skbdesc->desc = txd; skbdesc->desc_len = TXD_DESC_SIZE; } /* * TX data initialization */ static void rt2800pci_kick_tx_queue(struct rt2x00_dev *rt2x00dev, const enum data_queue_qid queue_idx) { struct data_queue *queue; unsigned int idx, qidx = 0; if (queue_idx > QID_HCCA && queue_idx != QID_MGMT) return; queue = rt2x00queue_get_queue(rt2x00dev, queue_idx); idx = queue->index[Q_INDEX]; if (queue_idx == QID_MGMT) qidx = 5; else qidx = queue_idx; rt2800_register_write(rt2x00dev, TX_CTX_IDX(qidx), idx); } static void rt2800pci_kill_tx_queue(struct rt2x00_dev *rt2x00dev, const enum data_queue_qid qid) { u32 reg; if (qid == QID_BEACON) { rt2800_register_write(rt2x00dev, BCN_TIME_CFG, 0); return; } rt2800_register_read(rt2x00dev, WPDMA_RST_IDX, ®); rt2x00_set_field32(®, WPDMA_RST_IDX_DTX_IDX0, (qid == QID_AC_BE)); rt2x00_set_field32(®, WPDMA_RST_IDX_DTX_IDX1, (qid == QID_AC_BK)); rt2x00_set_field32(®, WPDMA_RST_IDX_DTX_IDX2, (qid == QID_AC_VI)); rt2x00_set_field32(®, WPDMA_RST_IDX_DTX_IDX3, (qid == QID_AC_VO)); rt2800_register_write(rt2x00dev, WPDMA_RST_IDX, reg); } /* * RX control handlers */ static void rt2800pci_fill_rxdone(struct queue_entry *entry, struct rxdone_entry_desc *rxdesc) { struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; struct queue_entry_priv_pci *entry_priv = entry->priv_data; __le32 *rxd = entry_priv->desc; u32 word; rt2x00_desc_read(rxd, 3, &word); if (rt2x00_get_field32(word, RXD_W3_CRC_ERROR)) rxdesc->flags |= RX_FLAG_FAILED_FCS_CRC; /* * Unfortunately we don't know the cipher type used during * decryption. This prevents us from correct providing * correct statistics through debugfs. */ rxdesc->cipher_status = rt2x00_get_field32(word, RXD_W3_CIPHER_ERROR); if (rt2x00_get_field32(word, RXD_W3_DECRYPTED)) { /* * Hardware has stripped IV/EIV data from 802.11 frame during * decryption. Unfortunately the descriptor doesn't contain * any fields with the EIV/IV data either, so they can't * be restored by rt2x00lib. */ rxdesc->flags |= RX_FLAG_IV_STRIPPED; if (rxdesc->cipher_status == RX_CRYPTO_SUCCESS) rxdesc->flags |= RX_FLAG_DECRYPTED; else if (rxdesc->cipher_status == RX_CRYPTO_FAIL_MIC) rxdesc->flags |= RX_FLAG_MMIC_ERROR; } if (rt2x00_get_field32(word, RXD_W3_MY_BSS)) rxdesc->dev_flags |= RXDONE_MY_BSS; if (rt2x00_get_field32(word, RXD_W3_L2PAD)) rxdesc->dev_flags |= RXDONE_L2PAD; /* * Process the RXWI structure that is at the start of the buffer. */ rt2800_process_rxwi(entry, rxdesc); /* * Set RX IDX in register to inform hardware that we have handled * this entry and it is available for reuse again. */ rt2800_register_write(rt2x00dev, RX_CRX_IDX, entry->entry_idx); } /* * Interrupt functions. */ static void rt2800pci_txdone(struct rt2x00_dev *rt2x00dev) { struct data_queue *queue; struct queue_entry *entry; __le32 *txwi; struct txdone_entry_desc txdesc; u32 word; u32 reg; int wcid, ack, pid, tx_wcid, tx_ack, tx_pid; u16 mcs, real_mcs; int i; /* * TX_STA_FIFO is a stack of X entries, hence read TX_STA_FIFO * at most X times and also stop processing once the TX_STA_FIFO_VALID * flag is not set anymore. * * The legacy drivers use X=TX_RING_SIZE but state in a comment * that the TX_STA_FIFO stack has a size of 16. We stick to our * tx ring size for now. */ for (i = 0; i < TX_ENTRIES; i++) { rt2800_register_read(rt2x00dev, TX_STA_FIFO, ®); if (!rt2x00_get_field32(reg, TX_STA_FIFO_VALID)) break; wcid = rt2x00_get_field32(reg, TX_STA_FIFO_WCID); ack = rt2x00_get_field32(reg, TX_STA_FIFO_TX_ACK_REQUIRED); pid = rt2x00_get_field32(reg, TX_STA_FIFO_PID_TYPE); /* * Skip this entry when it contains an invalid * queue identication number. */ if (pid <= 0 || pid > QID_RX) continue; queue = rt2x00queue_get_queue(rt2x00dev, pid - 1); if (unlikely(!queue)) continue; /* * Inside each queue, we process each entry in a chronological * order. We first check that the queue is not empty. */ if (rt2x00queue_empty(queue)) continue; entry = rt2x00queue_get_entry(queue, Q_INDEX_DONE); /* Check if we got a match by looking at WCID/ACK/PID * fields */ txwi = (__le32 *) entry->skb->data; rt2x00_desc_read(txwi, 1, &word); tx_wcid = rt2x00_get_field32(word, TXWI_W1_WIRELESS_CLI_ID); tx_ack = rt2x00_get_field32(word, TXWI_W1_ACK); tx_pid = rt2x00_get_field32(word, TXWI_W1_PACKETID); if ((wcid != tx_wcid) || (ack != tx_ack) || (pid != tx_pid)) WARNING(rt2x00dev, "invalid TX_STA_FIFO content\n"); /* * Obtain the status about this packet. */ txdesc.flags = 0; rt2x00_desc_read(txwi, 0, &word); mcs = rt2x00_get_field32(word, TXWI_W0_MCS); real_mcs = rt2x00_get_field32(reg, TX_STA_FIFO_MCS); /* * Ralink has a retry mechanism using a global fallback * table. We setup this fallback table to try the immediate * lower rate for all rates. In the TX_STA_FIFO, the MCS field * always contains the MCS used for the last transmission, be * it successful or not. */ if (rt2x00_get_field32(reg, TX_STA_FIFO_TX_SUCCESS)) { /* * Transmission succeeded. The number of retries is * mcs - real_mcs */ __set_bit(TXDONE_SUCCESS, &txdesc.flags); txdesc.retry = ((mcs > real_mcs) ? mcs - real_mcs : 0); } else { /* * Transmission failed. The number of retries is * always 7 in this case (for a total number of 8 * frames sent). */ __set_bit(TXDONE_FAILURE, &txdesc.flags); txdesc.retry = 7; } /* * the frame was retried at least once * -> hw used fallback rates */ if (txdesc.retry) __set_bit(TXDONE_FALLBACK, &txdesc.flags); rt2x00lib_txdone(entry, &txdesc); } } static void rt2800pci_wakeup(struct rt2x00_dev *rt2x00dev) { struct ieee80211_conf conf = { .flags = 0 }; struct rt2x00lib_conf libconf = { .conf = &conf }; rt2800_config(rt2x00dev, &libconf, IEEE80211_CONF_CHANGE_PS); } static irqreturn_t rt2800pci_interrupt_thread(int irq, void *dev_instance) { struct rt2x00_dev *rt2x00dev = dev_instance; u32 reg = rt2x00dev->irqvalue[0]; /* * 1 - Pre TBTT interrupt. */ if (rt2x00_get_field32(reg, INT_SOURCE_CSR_PRE_TBTT)) rt2x00lib_pretbtt(rt2x00dev); /* * 2 - Beacondone interrupt. */ if (rt2x00_get_field32(reg, INT_SOURCE_CSR_TBTT)) rt2x00lib_beacondone(rt2x00dev); /* * 3 - Rx ring done interrupt. */ if (rt2x00_get_field32(reg, INT_SOURCE_CSR_RX_DONE)) rt2x00pci_rxdone(rt2x00dev); /* * 4 - Tx done interrupt. */ if (rt2x00_get_field32(reg, INT_SOURCE_CSR_TX_FIFO_STATUS)) rt2800pci_txdone(rt2x00dev); /* * 5 - Auto wakeup interrupt. */ if (rt2x00_get_field32(reg, INT_SOURCE_CSR_AUTO_WAKEUP)) rt2800pci_wakeup(rt2x00dev); /* Enable interrupts again. */ rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_RADIO_IRQ_ON_ISR); return IRQ_HANDLED; } static irqreturn_t rt2800pci_interrupt(int irq, void *dev_instance) { struct rt2x00_dev *rt2x00dev = dev_instance; u32 reg; /* Read status and ACK all interrupts */ rt2800_register_read(rt2x00dev, INT_SOURCE_CSR, ®); rt2800_register_write(rt2x00dev, INT_SOURCE_CSR, reg); if (!reg) return IRQ_NONE; if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags)) return IRQ_HANDLED; /* Store irqvalue for use in the interrupt thread. */ rt2x00dev->irqvalue[0] = reg; /* Disable interrupts, will be enabled again in the interrupt thread. */ rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_RADIO_IRQ_OFF_ISR); return IRQ_WAKE_THREAD; } /* * Device probe functions. */ static int rt2800pci_validate_eeprom(struct rt2x00_dev *rt2x00dev) { /* * Read EEPROM into buffer */ if (rt2x00_is_soc(rt2x00dev)) rt2800pci_read_eeprom_soc(rt2x00dev); else if (rt2800pci_efuse_detect(rt2x00dev)) rt2800pci_read_eeprom_efuse(rt2x00dev); else rt2800pci_read_eeprom_pci(rt2x00dev); return rt2800_validate_eeprom(rt2x00dev); } static const struct rt2800_ops rt2800pci_rt2800_ops = { .register_read = rt2x00pci_register_read, .register_read_lock = rt2x00pci_register_read, /* same for PCI */ .register_write = rt2x00pci_register_write, .register_write_lock = rt2x00pci_register_write, /* same for PCI */ .register_multiread = rt2x00pci_register_multiread, .register_multiwrite = rt2x00pci_register_multiwrite, .regbusy_read = rt2x00pci_regbusy_read, .drv_init_registers = rt2800pci_init_registers, }; static int rt2800pci_probe_hw(struct rt2x00_dev *rt2x00dev) { int retval; rt2x00dev->priv = (void *)&rt2800pci_rt2800_ops; /* * Allocate eeprom data. */ retval = rt2800pci_validate_eeprom(rt2x00dev); if (retval) return retval; retval = rt2800_init_eeprom(rt2x00dev); if (retval) return retval; /* * Initialize hw specifications. */ retval = rt2800_probe_hw_mode(rt2x00dev); if (retval) return retval; /* * This device has multiple filters for control frames * and has a separate filter for PS Poll frames. */ __set_bit(DRIVER_SUPPORT_CONTROL_FILTERS, &rt2x00dev->flags); __set_bit(DRIVER_SUPPORT_CONTROL_FILTER_PSPOLL, &rt2x00dev->flags); /* * This device has a pre tbtt interrupt and thus fetches * a new beacon directly prior to transmission. */ __set_bit(DRIVER_SUPPORT_PRE_TBTT_INTERRUPT, &rt2x00dev->flags); /* * This device requires firmware. */ if (!rt2x00_is_soc(rt2x00dev)) __set_bit(DRIVER_REQUIRE_FIRMWARE, &rt2x00dev->flags); __set_bit(DRIVER_REQUIRE_DMA, &rt2x00dev->flags); __set_bit(DRIVER_REQUIRE_L2PAD, &rt2x00dev->flags); if (!modparam_nohwcrypt) __set_bit(CONFIG_SUPPORT_HW_CRYPTO, &rt2x00dev->flags); __set_bit(DRIVER_SUPPORT_LINK_TUNING, &rt2x00dev->flags); /* * Set the rssi offset. */ rt2x00dev->rssi_offset = DEFAULT_RSSI_OFFSET; return 0; } static const struct ieee80211_ops rt2800pci_mac80211_ops = { .tx = rt2x00mac_tx, .start = rt2x00mac_start, .stop = rt2x00mac_stop, .add_interface = rt2x00mac_add_interface, .remove_interface = rt2x00mac_remove_interface, .config = rt2x00mac_config, .configure_filter = rt2x00mac_configure_filter, .set_tim = rt2x00mac_set_tim, .set_key = rt2x00mac_set_key, .sw_scan_start = rt2x00mac_sw_scan_start, .sw_scan_complete = rt2x00mac_sw_scan_complete, .get_stats = rt2x00mac_get_stats, .get_tkip_seq = rt2800_get_tkip_seq, .set_rts_threshold = rt2800_set_rts_threshold, .bss_info_changed = rt2x00mac_bss_info_changed, .conf_tx = rt2800_conf_tx, .get_tsf = rt2800_get_tsf, .rfkill_poll = rt2x00mac_rfkill_poll, .ampdu_action = rt2800_ampdu_action, }; static const struct rt2x00lib_ops rt2800pci_rt2x00_ops = { .irq_handler = rt2800pci_interrupt, .irq_handler_thread = rt2800pci_interrupt_thread, .probe_hw = rt2800pci_probe_hw, .get_firmware_name = rt2800pci_get_firmware_name, .check_firmware = rt2800pci_check_firmware, .load_firmware = rt2800pci_load_firmware, .initialize = rt2x00pci_initialize, .uninitialize = rt2x00pci_uninitialize, .get_entry_state = rt2800pci_get_entry_state, .clear_entry = rt2800pci_clear_entry, .set_device_state = rt2800pci_set_device_state, .rfkill_poll = rt2800_rfkill_poll, .link_stats = rt2800_link_stats, .reset_tuner = rt2800_reset_tuner, .link_tuner = rt2800_link_tuner, .write_tx_desc = rt2800pci_write_tx_desc, .write_tx_data = rt2800pci_write_tx_data, .write_beacon = rt2800_write_beacon, .kick_tx_queue = rt2800pci_kick_tx_queue, .kill_tx_queue = rt2800pci_kill_tx_queue, .fill_rxdone = rt2800pci_fill_rxdone, .config_shared_key = rt2800_config_shared_key, .config_pairwise_key = rt2800_config_pairwise_key, .config_filter = rt2800_config_filter, .config_intf = rt2800_config_intf, .config_erp = rt2800_config_erp, .config_ant = rt2800_config_ant, .config = rt2800_config, }; static const struct data_queue_desc rt2800pci_queue_rx = { .entry_num = RX_ENTRIES, .data_size = AGGREGATION_SIZE, .desc_size = RXD_DESC_SIZE, .priv_size = sizeof(struct queue_entry_priv_pci), }; static const struct data_queue_desc rt2800pci_queue_tx = { .entry_num = TX_ENTRIES, .data_size = AGGREGATION_SIZE, .desc_size = TXD_DESC_SIZE, .priv_size = sizeof(struct queue_entry_priv_pci), }; static const struct data_queue_desc rt2800pci_queue_bcn = { .entry_num = 8 * BEACON_ENTRIES, .data_size = 0, /* No DMA required for beacons */ .desc_size = TXWI_DESC_SIZE, .priv_size = sizeof(struct queue_entry_priv_pci), }; static const struct rt2x00_ops rt2800pci_ops = { .name = KBUILD_MODNAME, .max_sta_intf = 1, .max_ap_intf = 8, .eeprom_size = EEPROM_SIZE, .rf_size = RF_SIZE, .tx_queues = NUM_TX_QUEUES, .extra_tx_headroom = TXWI_DESC_SIZE, .rx = &rt2800pci_queue_rx, .tx = &rt2800pci_queue_tx, .bcn = &rt2800pci_queue_bcn, .lib = &rt2800pci_rt2x00_ops, .hw = &rt2800pci_mac80211_ops, #ifdef CONFIG_RT2X00_LIB_DEBUGFS .debugfs = &rt2800_rt2x00debug, #endif /* CONFIG_RT2X00_LIB_DEBUGFS */ }; /* * RT2800pci module information. */ #ifdef CONFIG_RT2800PCI_PCI static DEFINE_PCI_DEVICE_TABLE(rt2800pci_device_table) = { { PCI_DEVICE(0x1814, 0x0601), PCI_DEVICE_DATA(&rt2800pci_ops) }, { PCI_DEVICE(0x1814, 0x0681), PCI_DEVICE_DATA(&rt2800pci_ops) }, { PCI_DEVICE(0x1814, 0x0701), PCI_DEVICE_DATA(&rt2800pci_ops) }, { PCI_DEVICE(0x1814, 0x0781), PCI_DEVICE_DATA(&rt2800pci_ops) }, { PCI_DEVICE(0x1432, 0x7708), PCI_DEVICE_DATA(&rt2800pci_ops) }, { PCI_DEVICE(0x1432, 0x7727), PCI_DEVICE_DATA(&rt2800pci_ops) }, { PCI_DEVICE(0x1432, 0x7728), PCI_DEVICE_DATA(&rt2800pci_ops) }, { PCI_DEVICE(0x1432, 0x7738), PCI_DEVICE_DATA(&rt2800pci_ops) }, { PCI_DEVICE(0x1432, 0x7748), PCI_DEVICE_DATA(&rt2800pci_ops) }, { PCI_DEVICE(0x1432, 0x7758), PCI_DEVICE_DATA(&rt2800pci_ops) }, { PCI_DEVICE(0x1432, 0x7768), PCI_DEVICE_DATA(&rt2800pci_ops) }, { PCI_DEVICE(0x1a3b, 0x1059), PCI_DEVICE_DATA(&rt2800pci_ops) }, #ifdef CONFIG_RT2800PCI_RT30XX { PCI_DEVICE(0x1814, 0x3090), PCI_DEVICE_DATA(&rt2800pci_ops) }, { PCI_DEVICE(0x1814, 0x3091), PCI_DEVICE_DATA(&rt2800pci_ops) }, { PCI_DEVICE(0x1814, 0x3092), PCI_DEVICE_DATA(&rt2800pci_ops) }, { PCI_DEVICE(0x1462, 0x891a), PCI_DEVICE_DATA(&rt2800pci_ops) }, #endif #ifdef CONFIG_RT2800PCI_RT35XX { PCI_DEVICE(0x1814, 0x3060), PCI_DEVICE_DATA(&rt2800pci_ops) }, { PCI_DEVICE(0x1814, 0x3062), PCI_DEVICE_DATA(&rt2800pci_ops) }, { PCI_DEVICE(0x1814, 0x3562), PCI_DEVICE_DATA(&rt2800pci_ops) }, { PCI_DEVICE(0x1814, 0x3592), PCI_DEVICE_DATA(&rt2800pci_ops) }, { PCI_DEVICE(0x1814, 0x3593), PCI_DEVICE_DATA(&rt2800pci_ops) }, #endif { 0, } }; #endif /* CONFIG_RT2800PCI_PCI */ MODULE_AUTHOR(DRV_PROJECT); MODULE_VERSION(DRV_VERSION); MODULE_DESCRIPTION("Ralink RT2800 PCI & PCMCIA Wireless LAN driver."); MODULE_SUPPORTED_DEVICE("Ralink RT2860 PCI & PCMCIA chipset based cards"); #ifdef CONFIG_RT2800PCI_PCI MODULE_FIRMWARE(FIRMWARE_RT2860); MODULE_DEVICE_TABLE(pci, rt2800pci_device_table); #endif /* CONFIG_RT2800PCI_PCI */ MODULE_LICENSE("GPL"); #ifdef CONFIG_RT2800PCI_SOC static int rt2800soc_probe(struct platform_device *pdev) { return rt2x00soc_probe(pdev, &rt2800pci_ops); } static struct platform_driver rt2800soc_driver = { .driver = { .name = "rt2800_wmac", .owner = THIS_MODULE, .mod_name = KBUILD_MODNAME, }, .probe = rt2800soc_probe, .remove = __devexit_p(rt2x00soc_remove), .suspend = rt2x00soc_suspend, .resume = rt2x00soc_resume, }; #endif /* CONFIG_RT2800PCI_SOC */ #ifdef CONFIG_RT2800PCI_PCI static struct pci_driver rt2800pci_driver = { .name = KBUILD_MODNAME, .id_table = rt2800pci_device_table, .probe = rt2x00pci_probe, .remove = __devexit_p(rt2x00pci_remove), .suspend = rt2x00pci_suspend, .resume = rt2x00pci_resume, }; #endif /* CONFIG_RT2800PCI_PCI */ static int __init rt2800pci_init(void) { int ret = 0; #ifdef CONFIG_RT2800PCI_SOC ret = platform_driver_register(&rt2800soc_driver); if (ret) return ret; #endif #ifdef CONFIG_RT2800PCI_PCI ret = pci_register_driver(&rt2800pci_driver); if (ret) { #ifdef CONFIG_RT2800PCI_SOC platform_driver_unregister(&rt2800soc_driver); #endif return ret; } #endif return ret; } static void __exit rt2800pci_exit(void) { #ifdef CONFIG_RT2800PCI_PCI pci_unregister_driver(&rt2800pci_driver); #endif #ifdef CONFIG_RT2800PCI_SOC platform_driver_unregister(&rt2800soc_driver); #endif } module_init(rt2800pci_init); module_exit(rt2800pci_exit);