freebsd-dev/sys/dev/ral/rt2560reg.h
Eitan Adler 7a22215c53 Fix undefined behavior: (1 << 31) is not defined as 1 is an int and this
shifts into the sign bit.  Instead use (1U << 31) which gets the
expected result.

This fix is not ideal as it assumes a 32 bit int, but does fix the issue
for most cases.

A similar change was made in OpenBSD.

Discussed with:	-arch, rdivacky
Reviewed by:	cperciva
2013-11-30 22:17:27 +00:00

490 lines
16 KiB
C

/* $FreeBSD$ */
/*-
* Copyright (c) 2005, 2006
* Damien Bergamini <damien.bergamini@free.fr>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#define RT2560_DEFAULT_RSSI_CORR 0x79
#define RT2560_NOISE_FLOOR -95
#define RT2560_TX_RING_COUNT 48
#define RT2560_ATIM_RING_COUNT 4
#define RT2560_PRIO_RING_COUNT 16
#define RT2560_BEACON_RING_COUNT 1
#define RT2560_RX_RING_COUNT 32
#define RT2560_TX_DESC_SIZE (sizeof (struct rt2560_tx_desc))
#define RT2560_RX_DESC_SIZE (sizeof (struct rt2560_rx_desc))
#define RT2560_MAX_SCATTER 1
/*
* Control and status registers.
*/
#define RT2560_CSR0 0x0000 /* ASIC version number */
#define RT2560_CSR1 0x0004 /* System control */
#define RT2560_CSR3 0x000c /* STA MAC address 0 */
#define RT2560_CSR4 0x0010 /* STA MAC address 1 */
#define RT2560_CSR5 0x0014 /* BSSID 0 */
#define RT2560_CSR6 0x0018 /* BSSID 1 */
#define RT2560_CSR7 0x001c /* Interrupt source */
#define RT2560_CSR8 0x0020 /* Interrupt mask */
#define RT2560_CSR9 0x0024 /* Maximum frame length */
#define RT2560_SECCSR0 0x0028 /* WEP control */
#define RT2560_CSR11 0x002c /* Back-off control */
#define RT2560_CSR12 0x0030 /* Synchronization configuration 0 */
#define RT2560_CSR13 0x0034 /* Synchronization configuration 1 */
#define RT2560_CSR14 0x0038 /* Synchronization control */
#define RT2560_CSR15 0x003c /* Synchronization status */
#define RT2560_CSR16 0x0040 /* TSF timer 0 */
#define RT2560_CSR17 0x0044 /* TSF timer 1 */
#define RT2560_CSR18 0x0048 /* IFS timer 0 */
#define RT2560_CSR19 0x004c /* IFS timer 1 */
#define RT2560_CSR20 0x0050 /* WAKEUP timer */
#define RT2560_CSR21 0x0054 /* EEPROM control */
#define RT2560_CSR22 0x0058 /* CFP control */
#define RT2560_TXCSR0 0x0060 /* TX control */
#define RT2560_TXCSR1 0x0064 /* TX configuration */
#define RT2560_TXCSR2 0x0068 /* TX descriptor configuration */
#define RT2560_TXCSR3 0x006c /* TX ring base address */
#define RT2560_TXCSR4 0x0070 /* TX ATIM ring base address */
#define RT2560_TXCSR5 0x0074 /* TX PRIO ring base address */
#define RT2560_TXCSR6 0x0078 /* Beacon base address */
#define RT2560_TXCSR7 0x007c /* AutoResponder control */
#define RT2560_RXCSR0 0x0080 /* RX control */
#define RT2560_RXCSR1 0x0084 /* RX descriptor configuration */
#define RT2560_RXCSR2 0x0088 /* RX ring base address */
#define RT2560_PCICSR 0x008c /* PCI control */
#define RT2560_RXCSR3 0x0090 /* BBP ID 0 */
#define RT2560_TXCSR9 0x0094 /* OFDM TX BBP */
#define RT2560_ARSP_PLCP_0 0x0098 /* Auto Responder PLCP address */
#define RT2560_ARSP_PLCP_1 0x009c /* Auto Responder Basic Rate mask */
#define RT2560_CNT0 0x00a0 /* FCS error counter */
#define RT2560_CNT1 0x00ac /* PLCP error counter */
#define RT2560_CNT2 0x00b0 /* Long error counter */
#define RT2560_CNT3 0x00b8 /* CCA false alarm counter */
#define RT2560_CNT4 0x00bc /* RX FIFO Overflow counter */
#define RT2560_CNT5 0x00c0 /* Tx FIFO Underrun counter */
#define RT2560_PWRCSR0 0x00c4 /* Power mode configuration */
#define RT2560_PSCSR0 0x00c8 /* Power state transition time */
#define RT2560_PSCSR1 0x00cc /* Power state transition time */
#define RT2560_PSCSR2 0x00d0 /* Power state transition time */
#define RT2560_PSCSR3 0x00d4 /* Power state transition time */
#define RT2560_PWRCSR1 0x00d8 /* Manual power control/status */
#define RT2560_TIMECSR 0x00dc /* Timer control */
#define RT2560_MACCSR0 0x00e0 /* MAC configuration */
#define RT2560_MACCSR1 0x00e4 /* MAC configuration */
#define RT2560_RALINKCSR 0x00e8 /* Ralink RX auto-reset BBCR */
#define RT2560_BCNCSR 0x00ec /* Beacon interval control */
#define RT2560_BBPCSR 0x00f0 /* BBP serial control */
#define RT2560_RFCSR 0x00f4 /* RF serial control */
#define RT2560_LEDCSR 0x00f8 /* LED control */
#define RT2560_SECCSR3 0x00fc /* XXX not documented */
#define RT2560_DMACSR0 0x0100 /* Current RX ring address */
#define RT2560_DMACSR1 0x0104 /* Current Tx ring address */
#define RT2560_DMACSR2 0x0104 /* Current Priority ring address */
#define RT2560_DMACSR3 0x0104 /* Current ATIM ring address */
#define RT2560_TXACKCSR0 0x0110 /* XXX not documented */
#define RT2560_GPIOCSR 0x0120 /* */
#define RT2560_BBBPPCSR 0x0124 /* BBP Pin Control */
#define RT2560_FIFOCSR0 0x0128 /* TX FIFO pointer */
#define RT2560_FIFOCSR1 0x012c /* RX FIFO pointer */
#define RT2560_BCNOCSR 0x0130 /* Beacon time offset */
#define RT2560_RLPWCSR 0x0134 /* RX_PE Low Width */
#define RT2560_TESTCSR 0x0138 /* Test Mode Select */
#define RT2560_PLCP1MCSR 0x013c /* Signal/Service/Length of ACK @1M */
#define RT2560_PLCP2MCSR 0x0140 /* Signal/Service/Length of ACK @2M */
#define RT2560_PLCP5p5MCSR 0x0144 /* Signal/Service/Length of ACK @5.5M */
#define RT2560_PLCP11MCSR 0x0148 /* Signal/Service/Length of ACK @11M */
#define RT2560_ACKPCTCSR 0x014c /* ACK/CTS padload consume time */
#define RT2560_ARTCSR1 0x0150 /* ACK/CTS padload consume time */
#define RT2560_ARTCSR2 0x0154 /* ACK/CTS padload consume time */
#define RT2560_SECCSR1 0x0158 /* WEP control */
#define RT2560_BBPCSR1 0x015c /* BBP TX Configuration */
/* possible flags for register RXCSR0 */
#define RT2560_DISABLE_RX (1 << 0)
#define RT2560_DROP_CRC_ERROR (1 << 1)
#define RT2560_DROP_PHY_ERROR (1 << 2)
#define RT2560_DROP_CTL (1 << 3)
#define RT2560_DROP_NOT_TO_ME (1 << 4)
#define RT2560_DROP_TODS (1 << 5)
#define RT2560_DROP_VERSION_ERROR (1 << 6)
/* possible flags for register CSR1 */
#define RT2560_RESET_ASIC (1 << 0)
#define RT2560_RESET_BBP (1 << 1)
#define RT2560_HOST_READY (1 << 2)
/* possible flags for register CSR14 */
#define RT2560_ENABLE_TSF (1 << 0)
#define RT2560_ENABLE_TSF_SYNC(x) (((x) & 0x3) << 1)
#define RT2560_ENABLE_TBCN (1 << 3)
#define RT2560_ENABLE_BEACON_GENERATOR (1 << 6)
/* possible flags for register CSR21 */
#define RT2560_C (1 << 1)
#define RT2560_S (1 << 2)
#define RT2560_D (1 << 3)
#define RT2560_Q (1 << 4)
#define RT2560_93C46 (1 << 5)
#define RT2560_SHIFT_D 3
#define RT2560_SHIFT_Q 4
/* possible flags for register TXCSR0 */
#define RT2560_KICK_TX (1 << 0)
#define RT2560_KICK_ATIM (1 << 1)
#define RT2560_KICK_PRIO (1 << 2)
#define RT2560_ABORT_TX (1 << 3)
/* possible flags for register SECCSR0 */
#define RT2560_KICK_DECRYPT (1 << 0)
/* possible flags for register SECCSR1 */
#define RT2560_KICK_ENCRYPT (1 << 0)
/* possible flags for register CSR7 */
#define RT2560_BEACON_EXPIRE 0x00000001
#define RT2560_WAKEUP_EXPIRE 0x00000002
#define RT2560_ATIM_EXPIRE 0x00000004
#define RT2560_TX_DONE 0x00000008
#define RT2560_ATIM_DONE 0x00000010
#define RT2560_PRIO_DONE 0x00000020
#define RT2560_RX_DONE 0x00000040
#define RT2560_DECRYPTION_DONE 0x00000080
#define RT2560_ENCRYPTION_DONE 0x00000100
#define RT2560_INTR_MASK \
(~(RT2560_BEACON_EXPIRE | RT2560_WAKEUP_EXPIRE | RT2560_TX_DONE | \
RT2560_PRIO_DONE | RT2560_RX_DONE | RT2560_DECRYPTION_DONE | \
RT2560_ENCRYPTION_DONE))
/* Tx descriptor */
struct rt2560_tx_desc {
uint32_t flags;
#define RT2560_TX_BUSY (1 << 0)
#define RT2560_TX_VALID (1 << 1)
#define RT2560_TX_RESULT_MASK 0x0000001c
#define RT2560_TX_SUCCESS (0 << 2)
#define RT2560_TX_SUCCESS_RETRY (1 << 2)
#define RT2560_TX_FAIL_RETRY (2 << 2)
#define RT2560_TX_FAIL_INVALID (3 << 2)
#define RT2560_TX_FAIL_OTHER (4 << 2)
#define RT2560_TX_MORE_FRAG (1 << 8)
#define RT2560_TX_ACK (1 << 9)
#define RT2560_TX_TIMESTAMP (1 << 10)
#define RT2560_TX_OFDM (1 << 11)
#define RT2560_TX_CIPHER_BUSY (1 << 12)
#define RT2560_TX_IFS_MASK 0x00006000
#define RT2560_TX_IFS_BACKOFF (0 << 13)
#define RT2560_TX_IFS_SIFS (1 << 13)
#define RT2560_TX_IFS_NEWBACKOFF (2 << 13)
#define RT2560_TX_IFS_NONE (3 << 13)
#define RT2560_TX_LONG_RETRY (1 << 15)
#define RT2560_TX_CIPHER_MASK 0xe0000000
#define RT2560_TX_CIPHER_NONE (0 << 29)
#define RT2560_TX_CIPHER_WEP40 (1 << 29)
#define RT2560_TX_CIPHER_WEP104 (2 << 29)
#define RT2560_TX_CIPHER_TKIP (3 << 29)
#define RT2560_TX_CIPHER_AES (4 << 29)
#define RT2560_TX_RETRYCNT(v) (((v) >> 5) & 0x7)
uint32_t physaddr;
uint16_t wme;
#define RT2560_LOGCWMAX(x) (((x) & 0xf) << 12)
#define RT2560_LOGCWMIN(x) (((x) & 0xf) << 8)
#define RT2560_AIFSN(x) (((x) & 0x3) << 6)
#define RT2560_IVOFFSET(x) (((x) & 0x3f))
uint16_t reserved1;
uint8_t plcp_signal;
uint8_t plcp_service;
#define RT2560_PLCP_LENGEXT 0x80
uint8_t plcp_length_lo;
uint8_t plcp_length_hi;
uint32_t iv;
uint32_t eiv;
uint8_t key[IEEE80211_KEYBUF_SIZE];
uint32_t reserved2[2];
} __packed;
/* Rx descriptor */
struct rt2560_rx_desc {
uint32_t flags;
#define RT2560_RX_BUSY (1 << 0)
#define RT2560_RX_CRC_ERROR (1 << 5)
#define RT2560_RX_OFDM (1 << 6)
#define RT2560_RX_PHY_ERROR (1 << 7)
#define RT2560_RX_CIPHER_BUSY (1 << 8)
#define RT2560_RX_ICV_ERROR (1 << 9)
#define RT2560_RX_CIPHER_MASK 0xe0000000
#define RT2560_RX_CIPHER_NONE (0 << 29)
#define RT2560_RX_CIPHER_WEP40 (1 << 29)
#define RT2560_RX_CIPHER_WEP104 (2 << 29)
#define RT2560_RX_CIPHER_TKIP (3 << 29)
#define RT2560_RX_CIPHER_AES (4 << 29)
uint32_t physaddr;
uint8_t rate;
uint8_t rssi;
uint8_t ta[IEEE80211_ADDR_LEN];
uint32_t iv;
uint32_t eiv;
uint8_t key[IEEE80211_KEYBUF_SIZE];
uint32_t reserved[2];
} __packed;
#define RAL_RF1 0
#define RAL_RF2 2
#define RAL_RF3 1
#define RAL_RF4 3
#define RT2560_RF1_AUTOTUNE 0x08000
#define RT2560_RF3_AUTOTUNE 0x00040
#define RT2560_BBP_BUSY (1 << 15)
#define RT2560_BBP_WRITE (1 << 16)
#define RT2560_RF_20BIT (20 << 24)
#define RT2560_RF_BUSY (1U << 31)
#define RT2560_RF_2522 0x00
#define RT2560_RF_2523 0x01
#define RT2560_RF_2524 0x02
#define RT2560_RF_2525 0x03
#define RT2560_RF_2525E 0x04
#define RT2560_RF_2526 0x05
/* dual-band RF */
#define RT2560_RF_5222 0x10
#define RT2560_BBP_VERSION 0
#define RT2560_BBP_TX 2
#define RT2560_BBP_RX 14
#define RT2560_BBP_ANTA 0x00
#define RT2560_BBP_DIVERSITY 0x01
#define RT2560_BBP_ANTB 0x02
#define RT2560_BBP_ANTMASK 0x03
#define RT2560_BBP_FLIPIQ 0x04
#define RT2560_LED_MODE_DEFAULT 0
#define RT2560_LED_MODE_TXRX_ACTIVITY 1
#define RT2560_LED_MODE_SINGLE 2
#define RT2560_LED_MODE_ASUS 3
#define RT2560_JAPAN_FILTER 0x8
#define RT2560_EEPROM_DELAY 1 /* minimum hold time (microsecond) */
#define RT2560_EEPROM_CONFIG0 16
#define RT2560_EEPROM_BBP_BASE 19
#define RT2560_EEPROM_TXPOWER 35
#define RT2560_EEPROM_CALIBRATE 62
/*
* control and status registers access macros
*/
#define RAL_READ(sc, reg) \
bus_space_read_4((sc)->sc_st, (sc)->sc_sh, (reg))
#define RAL_WRITE(sc, reg, val) \
bus_space_write_4((sc)->sc_st, (sc)->sc_sh, (reg), (val))
/*
* EEPROM access macro
*/
#define RT2560_EEPROM_CTL(sc, val) do { \
RAL_WRITE((sc), RT2560_CSR21, (val)); \
DELAY(RT2560_EEPROM_DELAY); \
} while (/* CONSTCOND */0)
/*
* Default values for MAC registers; values taken from the reference driver.
*/
#define RT2560_DEF_MAC \
{ RT2560_PSCSR0, 0x00020002 }, \
{ RT2560_PSCSR1, 0x00000002 }, \
{ RT2560_PSCSR2, 0x00020002 }, \
{ RT2560_PSCSR3, 0x00000002 }, \
{ RT2560_TIMECSR, 0x00003f21 }, \
{ RT2560_CSR9, 0x00000780 }, \
{ RT2560_CSR11, 0x07041483 }, \
{ RT2560_CNT3, 0x00000000 }, \
{ RT2560_TXCSR1, 0x07614562 }, \
{ RT2560_ARSP_PLCP_0, 0x8c8d8b8a }, \
{ RT2560_ACKPCTCSR, 0x7038140a }, \
{ RT2560_ARTCSR1, 0x21212929 }, \
{ RT2560_ARTCSR2, 0x1d1d1d1d }, \
{ RT2560_RXCSR0, 0xffffffff }, \
{ RT2560_RXCSR3, 0xb3aab3af }, \
{ RT2560_PCICSR, 0x000003b8 }, \
{ RT2560_PWRCSR0, 0x3f3b3100 }, \
{ RT2560_GPIOCSR, 0x0000ff00 }, \
{ RT2560_TESTCSR, 0x000000f0 }, \
{ RT2560_PWRCSR1, 0x000001ff }, \
{ RT2560_MACCSR0, 0x00213223 }, \
{ RT2560_MACCSR1, 0x00235518 }, \
{ RT2560_RLPWCSR, 0x00000040 }, \
{ RT2560_RALINKCSR, 0x9a009a11 }, \
{ RT2560_CSR7, 0xffffffff }, \
{ RT2560_BBPCSR1, 0x82188200 }, \
{ RT2560_TXACKCSR0, 0x00000020 }, \
{ RT2560_SECCSR3, 0x0000e78f }
/*
* Default values for BBP registers; values taken from the reference driver.
*/
#define RT2560_DEF_BBP \
{ 3, 0x02 }, \
{ 4, 0x19 }, \
{ 14, 0x1c }, \
{ 15, 0x30 }, \
{ 16, 0xac }, \
{ 17, 0x48 }, \
{ 18, 0x18 }, \
{ 19, 0xff }, \
{ 20, 0x1e }, \
{ 21, 0x08 }, \
{ 22, 0x08 }, \
{ 23, 0x08 }, \
{ 24, 0x80 }, \
{ 25, 0x50 }, \
{ 26, 0x08 }, \
{ 27, 0x23 }, \
{ 30, 0x10 }, \
{ 31, 0x2b }, \
{ 32, 0xb9 }, \
{ 34, 0x12 }, \
{ 35, 0x50 }, \
{ 39, 0xc4 }, \
{ 40, 0x02 }, \
{ 41, 0x60 }, \
{ 53, 0x10 }, \
{ 54, 0x18 }, \
{ 56, 0x08 }, \
{ 57, 0x10 }, \
{ 58, 0x08 }, \
{ 61, 0x60 }, \
{ 62, 0x10 }, \
{ 75, 0xff }
/*
* Default values for RF register R2 indexed by channel numbers; values taken
* from the reference driver.
*/
#define RT2560_RF2522_R2 \
{ \
0x307f6, 0x307fb, 0x30800, 0x30805, 0x3080a, 0x3080f, 0x30814, \
0x30819, 0x3081e, 0x30823, 0x30828, 0x3082d, 0x30832, 0x3083e \
}
#define RT2560_RF2523_R2 \
{ \
0x00327, 0x00328, 0x00329, 0x0032a, 0x0032b, 0x0032c, 0x0032d, \
0x0032e, 0x0032f, 0x00340, 0x00341, 0x00342, 0x00343, 0x00346 \
}
#define RT2560_RF2524_R2 \
{ \
0x00327, 0x00328, 0x00329, 0x0032a, 0x0032b, 0x0032c, 0x0032d, \
0x0032e, 0x0032f, 0x00340, 0x00341, 0x00342, 0x00343, 0x00346 \
}
#define RT2560_RF2525_R2 \
{ \
0x20327, 0x20328, 0x20329, 0x2032a, 0x2032b, 0x2032c, 0x2032d, \
0x2032e, 0x2032f, 0x20340, 0x20341, 0x20342, 0x20343, 0x20346 \
}
#define RT2560_RF2525_HI_R2 \
{ \
0x2032f, 0x20340, 0x20341, 0x20342, 0x20343, 0x20344, 0x20345, \
0x20346, 0x20347, 0x20348, 0x20349, 0x2034a, 0x2034b, 0x2034e \
}
#define RT2560_RF2525E_R2 \
{ \
0x2044d, 0x2044e, 0x2044f, 0x20460, 0x20461, 0x20462, 0x20463, \
0x20464, 0x20465, 0x20466, 0x20467, 0x20468, 0x20469, 0x2046b \
}
#define RT2560_RF2526_HI_R2 \
{ \
0x0022a, 0x0022b, 0x0022b, 0x0022c, 0x0022c, 0x0022d, 0x0022d, \
0x0022e, 0x0022e, 0x0022f, 0x0022d, 0x00240, 0x00240, 0x00241 \
}
#define RT2560_RF2526_R2 \
{ \
0x00226, 0x00227, 0x00227, 0x00228, 0x00228, 0x00229, 0x00229, \
0x0022a, 0x0022a, 0x0022b, 0x0022b, 0x0022c, 0x0022c, 0x0022d \
}
/*
* For dual-band RF, RF registers R1 and R4 also depend on channel number;
* values taken from the reference driver.
*/
#define RT2560_RF5222 \
{ 1, 0x08808, 0x0044d, 0x00282 }, \
{ 2, 0x08808, 0x0044e, 0x00282 }, \
{ 3, 0x08808, 0x0044f, 0x00282 }, \
{ 4, 0x08808, 0x00460, 0x00282 }, \
{ 5, 0x08808, 0x00461, 0x00282 }, \
{ 6, 0x08808, 0x00462, 0x00282 }, \
{ 7, 0x08808, 0x00463, 0x00282 }, \
{ 8, 0x08808, 0x00464, 0x00282 }, \
{ 9, 0x08808, 0x00465, 0x00282 }, \
{ 10, 0x08808, 0x00466, 0x00282 }, \
{ 11, 0x08808, 0x00467, 0x00282 }, \
{ 12, 0x08808, 0x00468, 0x00282 }, \
{ 13, 0x08808, 0x00469, 0x00282 }, \
{ 14, 0x08808, 0x0046b, 0x00286 }, \
\
{ 36, 0x08804, 0x06225, 0x00287 }, \
{ 40, 0x08804, 0x06226, 0x00287 }, \
{ 44, 0x08804, 0x06227, 0x00287 }, \
{ 48, 0x08804, 0x06228, 0x00287 }, \
{ 52, 0x08804, 0x06229, 0x00287 }, \
{ 56, 0x08804, 0x0622a, 0x00287 }, \
{ 60, 0x08804, 0x0622b, 0x00287 }, \
{ 64, 0x08804, 0x0622c, 0x00287 }, \
\
{ 100, 0x08804, 0x02200, 0x00283 }, \
{ 104, 0x08804, 0x02201, 0x00283 }, \
{ 108, 0x08804, 0x02202, 0x00283 }, \
{ 112, 0x08804, 0x02203, 0x00283 }, \
{ 116, 0x08804, 0x02204, 0x00283 }, \
{ 120, 0x08804, 0x02205, 0x00283 }, \
{ 124, 0x08804, 0x02206, 0x00283 }, \
{ 128, 0x08804, 0x02207, 0x00283 }, \
{ 132, 0x08804, 0x02208, 0x00283 }, \
{ 136, 0x08804, 0x02209, 0x00283 }, \
{ 140, 0x08804, 0x0220a, 0x00283 }, \
\
{ 149, 0x08808, 0x02429, 0x00281 }, \
{ 153, 0x08808, 0x0242b, 0x00281 }, \
{ 157, 0x08808, 0x0242d, 0x00281 }, \
{ 161, 0x08808, 0x0242f, 0x00281 }