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path: root/drivers/net/wireless/rt2x00/rt2800pci.c
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Diffstat (limited to 'drivers/net/wireless/rt2x00/rt2800pci.c')
-rw-r--r--drivers/net/wireless/rt2x00/rt2800pci.c366
1 files changed, 167 insertions, 199 deletions
diff --git a/drivers/net/wireless/rt2x00/rt2800pci.c b/drivers/net/wireless/rt2x00/rt2800pci.c
index b2f23272c3aa..39b3846fa340 100644
--- a/drivers/net/wireless/rt2x00/rt2800pci.c
+++ b/drivers/net/wireless/rt2x00/rt2800pci.c
@@ -31,7 +31,6 @@
Supported chipsets: RT2800E & RT2800ED.
*/
-#include <linux/crc-ccitt.h>
#include <linux/delay.h>
#include <linux/etherdevice.h>
#include <linux/init.h>
@@ -51,7 +50,7 @@
/*
* Allow hardware encryption to be disabled.
*/
-static int modparam_nohwcrypt = 1;
+static int modparam_nohwcrypt = 0;
module_param_named(nohwcrypt, modparam_nohwcrypt, bool, S_IRUGO);
MODULE_PARM_DESC(nohwcrypt, "Disable hardware encryption.");
@@ -139,8 +138,18 @@ static void rt2800pci_read_eeprom_pci(struct rt2x00_dev *rt2x00dev)
eeprom.data = rt2x00dev;
eeprom.register_read = rt2800pci_eepromregister_read;
eeprom.register_write = rt2800pci_eepromregister_write;
- eeprom.width = !rt2x00_get_field32(reg, E2PROM_CSR_TYPE) ?
- PCI_EEPROM_WIDTH_93C46 : PCI_EEPROM_WIDTH_93C66;
+ 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;
@@ -182,82 +191,14 @@ static char *rt2800pci_get_firmware_name(struct rt2x00_dev *rt2x00dev)
return FIRMWARE_RT2860;
}
-static int rt2800pci_check_firmware(struct rt2x00_dev *rt2x00dev,
+static int rt2800pci_write_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, &reg);
- 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, &reg);
- rt2x00_set_field32(&reg, WPDMA_GLO_CFG_ENABLE_TX_DMA, 0);
- rt2x00_set_field32(&reg, WPDMA_GLO_CFG_TX_DMA_BUSY, 0);
- rt2x00_set_field32(&reg, WPDMA_GLO_CFG_ENABLE_RX_DMA, 0);
- rt2x00_set_field32(&reg, WPDMA_GLO_CFG_RX_DMA_BUSY, 0);
- rt2x00_set_field32(&reg, WPDMA_GLO_CFG_TX_WRITEBACK_DONE, 1);
- rt2800_register_write(rt2x00dev, WPDMA_GLO_CFG, reg);
-
- /*
* enable Host program ram write selection
*/
reg = 0;
@@ -268,34 +209,11 @@ static int rt2800pci_load_firmware(struct rt2x00_dev *rt2x00dev,
* Write firmware to device.
*/
rt2800_register_multiwrite(rt2x00dev, FIRMWARE_IMAGE_BASE,
- data, len);
+ 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, &reg);
- 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);
@@ -412,7 +330,8 @@ static void rt2800pci_toggle_rx(struct rt2x00_dev *rt2x00dev,
static void rt2800pci_toggle_irq(struct rt2x00_dev *rt2x00dev,
enum dev_state state)
{
- int mask = (state == STATE_RADIO_IRQ_ON);
+ int mask = (state == STATE_RADIO_IRQ_ON) ||
+ (state == STATE_RADIO_IRQ_ON_ISR);
u32 reg;
/*
@@ -446,6 +365,38 @@ static void rt2800pci_toggle_irq(struct rt2x00_dev *rt2x00dev,
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, &reg);
+ rt2x00_set_field32(&reg, WPDMA_RST_IDX_DTX_IDX0, 1);
+ rt2x00_set_field32(&reg, WPDMA_RST_IDX_DTX_IDX1, 1);
+ rt2x00_set_field32(&reg, WPDMA_RST_IDX_DTX_IDX2, 1);
+ rt2x00_set_field32(&reg, WPDMA_RST_IDX_DTX_IDX3, 1);
+ rt2x00_set_field32(&reg, WPDMA_RST_IDX_DTX_IDX4, 1);
+ rt2x00_set_field32(&reg, WPDMA_RST_IDX_DTX_IDX5, 1);
+ rt2x00_set_field32(&reg, 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, &reg);
+ rt2x00_set_field32(&reg, MAC_SYS_CTRL_RESET_CSR, 1);
+ rt2x00_set_field32(&reg, 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;
@@ -465,7 +416,7 @@ static int rt2800pci_enable_radio(struct rt2x00_dev *rt2x00dev)
/*
* Send signal to firmware during boot time.
*/
- rt2800_mcu_request(rt2x00dev, MCU_BOOT_SIGNAL, 0xff, 0, 0);
+ rt2800_mcu_request(rt2x00dev, MCU_BOOT_SIGNAL, 0, 0, 0);
/*
* Enable RX.
@@ -589,7 +540,9 @@ static int rt2800pci_set_device_state(struct rt2x00_dev *rt2x00dev,
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:
@@ -613,18 +566,12 @@ static int rt2800pci_set_device_state(struct rt2x00_dev *rt2x00dev,
/*
* TX descriptor initialization
*/
-static int rt2800pci_write_tx_data(struct queue_entry* entry,
- struct txentry_desc *txdesc)
+static void rt2800pci_write_tx_data(struct queue_entry* entry,
+ struct txentry_desc *txdesc)
{
- int ret;
-
- ret = rt2x00pci_write_tx_data(entry, txdesc);
- if (ret)
- return ret;
+ __le32 *txwi = (__le32 *) entry->skb->data;
- rt2800_write_txwi(entry->skb, txdesc);
-
- return 0;
+ rt2800_write_txwi(txwi, txdesc);
}
@@ -684,49 +631,6 @@ static void rt2800pci_write_tx_desc(struct rt2x00_dev *rt2x00dev,
/*
* TX data initialization
*/
-static void rt2800pci_write_beacon(struct queue_entry *entry,
- struct txentry_desc *txdesc)
-{
- struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
- unsigned int beacon_base;
- u32 reg;
-
- /*
- * Disable beaconing while we are reloading the beacon data,
- * otherwise we might be sending out invalid data.
- */
- rt2800_register_read(rt2x00dev, BCN_TIME_CFG, &reg);
- rt2x00_set_field32(&reg, BCN_TIME_CFG_BEACON_GEN, 0);
- rt2800_register_write(rt2x00dev, BCN_TIME_CFG, reg);
-
- /*
- * Add the TXWI for the beacon to the skb.
- */
- rt2800_write_txwi(entry->skb, txdesc);
- skb_push(entry->skb, TXWI_DESC_SIZE);
-
- /*
- * Write entire beacon with TXWI to register.
- */
- beacon_base = HW_BEACON_OFFSET(entry->entry_idx);
- rt2800_register_multiwrite(rt2x00dev, beacon_base,
- entry->skb->data, entry->skb->len);
-
- /*
- * Enable beaconing again.
- */
- rt2x00_set_field32(&reg, BCN_TIME_CFG_TSF_TICKING, 1);
- rt2x00_set_field32(&reg, BCN_TIME_CFG_TBTT_ENABLE, 1);
- rt2x00_set_field32(&reg, BCN_TIME_CFG_BEACON_GEN, 1);
- rt2800_register_write(rt2x00dev, BCN_TIME_CFG, reg);
-
- /*
- * Clean up beacon skb.
- */
- dev_kfree_skb_any(entry->skb);
- entry->skb = NULL;
-}
-
static void rt2800pci_kick_tx_queue(struct rt2x00_dev *rt2x00dev,
const enum data_queue_qid queue_idx)
{
@@ -812,7 +716,7 @@ static void rt2800pci_fill_rxdone(struct queue_entry *entry,
/*
* Process the RXWI structure that is at the start of the buffer.
*/
- rt2800_process_rxwi(entry->skb, rxdesc);
+ rt2800_process_rxwi(entry, rxdesc);
/*
* Set RX IDX in register to inform hardware that we have handled
@@ -832,29 +736,24 @@ static void rt2800pci_txdone(struct rt2x00_dev *rt2x00dev)
struct txdone_entry_desc txdesc;
u32 word;
u32 reg;
- u32 old_reg;
int wcid, ack, pid, tx_wcid, tx_ack, tx_pid;
u16 mcs, real_mcs;
+ int i;
/*
- * During each loop we will compare the freshly read
- * TX_STA_FIFO register value with the value read from
- * the previous loop. If the 2 values are equal then
- * we should stop processing because the chance it
- * quite big that the device has been unplugged and
- * we risk going into an endless loop.
+ * 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.
*/
- old_reg = 0;
-
- while (1) {
+ for (i = 0; i < TX_ENTRIES; i++) {
rt2800_register_read(rt2x00dev, TX_STA_FIFO, &reg);
if (!rt2x00_get_field32(reg, TX_STA_FIFO_VALID))
break;
- if (old_reg == reg)
- break;
- old_reg = reg;
-
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);
@@ -880,8 +779,7 @@ static void rt2800pci_txdone(struct rt2x00_dev *rt2x00dev)
/* Check if we got a match by looking at WCID/ACK/PID
* fields */
- txwi = (__le32 *)(entry->skb->data -
- rt2x00dev->ops->extra_tx_headroom);
+ txwi = (__le32 *) entry->skb->data;
rt2x00_desc_read(txwi, 1, &word);
tx_wcid = rt2x00_get_field32(word, TXWI_W1_WIRELESS_CLI_ID);
@@ -923,8 +821,12 @@ static void rt2800pci_txdone(struct rt2x00_dev *rt2x00dev)
txdesc.retry = 7;
}
- __set_bit(TXDONE_FALLBACK, &txdesc.flags);
-
+ /*
+ * the frame was retried at least once
+ * -> hw used fallback rates
+ */
+ if (txdesc.retry)
+ __set_bit(TXDONE_FALLBACK, &txdesc.flags);
rt2x00lib_txdone(entry, &txdesc);
}
@@ -938,6 +840,48 @@ static void rt2800pci_wakeup(struct rt2x00_dev *rt2x00dev)
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;
@@ -953,19 +897,15 @@ static irqreturn_t rt2800pci_interrupt(int irq, void *dev_instance)
if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags))
return IRQ_HANDLED;
- /*
- * 1 - Rx ring done interrupt.
- */
- if (rt2x00_get_field32(reg, INT_SOURCE_CSR_RX_DONE))
- rt2x00pci_rxdone(rt2x00dev);
+ /* Store irqvalue for use in the interrupt thread. */
+ rt2x00dev->irqvalue[0] = reg;
- if (rt2x00_get_field32(reg, INT_SOURCE_CSR_TX_FIFO_STATUS))
- rt2800pci_txdone(rt2x00dev);
+ /* Disable interrupts, will be enabled again in the interrupt thread. */
+ rt2x00dev->ops->lib->set_device_state(rt2x00dev,
+ STATE_RADIO_IRQ_OFF_ISR);
- if (rt2x00_get_field32(reg, INT_SOURCE_CSR_AUTO_WAKEUP))
- rt2800pci_wakeup(rt2x00dev);
- return IRQ_HANDLED;
+ return IRQ_WAKE_THREAD;
}
/*
@@ -986,24 +926,10 @@ static int rt2800pci_validate_eeprom(struct rt2x00_dev *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,
-};
-
static int rt2800pci_probe_hw(struct rt2x00_dev *rt2x00dev)
{
int retval;
- rt2x00dev->priv = (void *)&rt2800pci_rt2800_ops;
-
/*
* Allocate eeprom data.
*/
@@ -1030,6 +956,12 @@ static int rt2800pci_probe_hw(struct rt2x00_dev *rt2x00dev)
__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))
@@ -1038,6 +970,7 @@ static int rt2800pci_probe_hw(struct rt2x00_dev *rt2x00dev)
__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.
@@ -1047,12 +980,46 @@ static int rt2800pci_probe_hw(struct rt2x00_dev *rt2x00dev)
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_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 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_write_firmware = rt2800pci_write_firmware,
+ .drv_init_registers = rt2800pci_init_registers,
+};
+
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,
+ .check_firmware = rt2800_check_firmware,
+ .load_firmware = rt2800_load_firmware,
.initialize = rt2x00pci_initialize,
.uninitialize = rt2x00pci_uninitialize,
.get_entry_state = rt2800pci_get_entry_state,
@@ -1064,7 +1031,7 @@ static const struct rt2x00lib_ops rt2800pci_rt2x00_ops = {
.link_tuner = rt2800_link_tuner,
.write_tx_desc = rt2800pci_write_tx_desc,
.write_tx_data = rt2800pci_write_tx_data,
- .write_beacon = rt2800pci_write_beacon,
+ .write_beacon = rt2800_write_beacon,
.kick_tx_queue = rt2800pci_kick_tx_queue,
.kill_tx_queue = rt2800pci_kill_tx_queue,
.fill_rxdone = rt2800pci_fill_rxdone,
@@ -1110,7 +1077,8 @@ static const struct rt2x00_ops rt2800pci_ops = {
.tx = &rt2800pci_queue_tx,
.bcn = &rt2800pci_queue_bcn,
.lib = &rt2800pci_rt2x00_ops,
- .hw = &rt2800_mac80211_ops,
+ .drv = &rt2800pci_rt2800_ops,
+ .hw = &rt2800pci_mac80211_ops,
#ifdef CONFIG_RT2X00_LIB_DEBUGFS
.debugfs = &rt2800_rt2x00debug,
#endif /* CONFIG_RT2X00_LIB_DEBUGFS */