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-rw-r--r--cpu/mpc8xx/scc.c541
1 files changed, 541 insertions, 0 deletions
diff --git a/cpu/mpc8xx/scc.c b/cpu/mpc8xx/scc.c
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+++ b/cpu/mpc8xx/scc.c
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+/*
+ * File: scc.c
+ * Description:
+ * Basic ET HW initialization and packet RX/TX routines
+ *
+ * NOTE <<<IMPORTANT: PLEASE READ>>>:
+ * Do not cache Rx/Tx buffers!
+ */
+
+/*
+ * MPC823 <-> MC68160 Connections:
+ *
+ * Setup MPC823 to work with MC68160 Enhanced Ethernet
+ * Serial Tranceiver as follows:
+ *
+ * MPC823 Signal MC68160 Comments
+ * ------ ------ ------- --------
+ * PA-12 ETHTX --------> TX Eth. Port Transmit Data
+ * PB-18 E_TENA --------> TENA Eth. Transmit Port Enable
+ * PA-5 ETHTCK <-------- TCLK Eth. Port Transmit Clock
+ * PA-13 ETHRX <-------- RX Eth. Port Receive Data
+ * PC-8 E_RENA <-------- RENA Eth. Receive Enable
+ * PA-6 ETHRCK <-------- RCLK Eth. Port Receive Clock
+ * PC-9 E_CLSN <-------- CLSN Eth. Port Collision Indication
+ *
+ * FADS Board Signal MC68160 Comments
+ * ----------------- ------- --------
+ * (BCSR1) ETHEN* --------> CS2 Eth. Port Enable
+ * (BSCR4) TPSQEL* --------> TPSQEL Twisted Pair Signal Quality Error Test Enable
+ * (BCSR4) TPFLDL* --------> TPFLDL Twisted Pair Full-Duplex
+ * (BCSR4) ETHLOOP --------> LOOP Eth. Port Diagnostic Loop-Back
+ *
+ */
+
+#include <common.h>
+#include <malloc.h>
+#include <commproc.h>
+#include <net.h>
+#include <command.h>
+
+#if (CONFIG_COMMANDS & CFG_CMD_NET) && defined(SCC_ENET)
+
+/* Ethernet Transmit and Receive Buffers */
+#define DBUF_LENGTH 1520
+
+#define TX_BUF_CNT 2
+
+#define TOUT_LOOP 100
+
+static char txbuf[DBUF_LENGTH];
+
+static uint rxIdx; /* index of the current RX buffer */
+static uint txIdx; /* index of the current TX buffer */
+
+/*
+ * SCC Ethernet Tx and Rx buffer descriptors allocated at the
+ * immr->udata_bd address on Dual-Port RAM
+ * Provide for Double Buffering
+ */
+
+typedef volatile struct CommonBufferDescriptor {
+ cbd_t rxbd[PKTBUFSRX]; /* Rx BD */
+ cbd_t txbd[TX_BUF_CNT]; /* Tx BD */
+} RTXBD;
+
+static RTXBD *rtx;
+
+static int scc_send(struct eth_device* dev, volatile void *packet, int length);
+static int scc_recv(struct eth_device* dev);
+static int scc_init (struct eth_device* dev, bd_t * bd);
+static void scc_halt(struct eth_device* dev);
+
+int scc_initialize(bd_t *bis)
+{
+ struct eth_device* dev;
+
+ dev = (struct eth_device*) malloc(sizeof *dev);
+
+ sprintf(dev->name, "SCC ETHERNET");
+ dev->iobase = 0;
+ dev->priv = 0;
+ dev->init = scc_init;
+ dev->halt = scc_halt;
+ dev->send = scc_send;
+ dev->recv = scc_recv;
+
+ eth_register(dev);
+
+ return 1;
+}
+
+static int scc_send(struct eth_device* dev, volatile void *packet, int length)
+{
+ int i, j=0;
+#if 0
+ volatile char *in, *out;
+#endif
+
+ /* section 16.9.23.3
+ * Wait for ready
+ */
+#if 0
+ while (rtx->txbd[txIdx].cbd_sc & BD_ENET_TX_READY);
+ out = (char *)(rtx->txbd[txIdx].cbd_bufaddr);
+ in = packet;
+ for(i = 0; i < length; i++) {
+ *out++ = *in++;
+ }
+ rtx->txbd[txIdx].cbd_datlen = length;
+ rtx->txbd[txIdx].cbd_sc |= (BD_ENET_TX_READY | BD_ENET_TX_LAST);
+ while (rtx->txbd[txIdx].cbd_sc & BD_ENET_TX_READY) j++;
+
+#ifdef ET_DEBUG
+ printf("cycles: %d status: %x\n", j, rtx->txbd[txIdx].cbd_sc);
+#endif
+ i = (rtx->txbd[txIdx++].cbd_sc & BD_ENET_TX_STATS) /* return only status bits */;
+
+ /* wrap around buffer index when necessary */
+ if (txIdx >= TX_BUF_CNT) txIdx = 0;
+#endif
+
+ while ((rtx->txbd[txIdx].cbd_sc & BD_ENET_TX_READY) && (j<TOUT_LOOP)) {
+ udelay (1); /* will also trigger Wd if needed */
+ j++;
+ }
+ if (j>=TOUT_LOOP) printf("TX not ready\n");
+ rtx->txbd[txIdx].cbd_bufaddr = (uint)packet;
+ rtx->txbd[txIdx].cbd_datlen = length;
+ rtx->txbd[txIdx].cbd_sc |= (BD_ENET_TX_READY | BD_ENET_TX_LAST |BD_ENET_TX_WRAP);
+ while ((rtx->txbd[txIdx].cbd_sc & BD_ENET_TX_READY) && (j<TOUT_LOOP)) {
+ udelay (1); /* will also trigger Wd if needed */
+ j++;
+ }
+ if (j>=TOUT_LOOP) printf("TX timeout\n");
+#ifdef ET_DEBUG
+ printf("cycles: %d status: %x\n", j, rtx->txbd[txIdx].cbd_sc);
+#endif
+ i = (rtx->txbd[txIdx].cbd_sc & BD_ENET_TX_STATS) /* return only status bits */;
+ return i;
+}
+
+static int scc_recv(struct eth_device* dev)
+{
+ int length;
+
+ for (;;) {
+ /* section 16.9.23.2 */
+ if (rtx->rxbd[rxIdx].cbd_sc & BD_ENET_RX_EMPTY) {
+ length = -1;
+ break; /* nothing received - leave for() loop */
+ }
+
+ length = rtx->rxbd[rxIdx].cbd_datlen;
+
+ if (rtx->rxbd[rxIdx].cbd_sc & 0x003f) {
+#ifdef ET_DEBUG
+ printf("err: %x\n", rtx->rxbd[rxIdx].cbd_sc);
+#endif
+ } else {
+ /* Pass the packet up to the protocol layers. */
+ NetReceive(NetRxPackets[rxIdx], length - 4);
+ }
+
+
+ /* Give the buffer back to the SCC. */
+ rtx->rxbd[rxIdx].cbd_datlen = 0;
+
+ /* wrap around buffer index when necessary */
+ if ((rxIdx + 1) >= PKTBUFSRX) {
+ rtx->rxbd[PKTBUFSRX - 1].cbd_sc = (BD_ENET_RX_WRAP | BD_ENET_RX_EMPTY);
+ rxIdx = 0;
+ } else {
+ rtx->rxbd[rxIdx].cbd_sc = BD_ENET_RX_EMPTY;
+ rxIdx++;
+ }
+ }
+ return length;
+}
+
+/**************************************************************
+ *
+ * SCC Ethernet Initialization Routine
+ *
+ *************************************************************/
+
+static int scc_init(struct eth_device* dev, bd_t *bis)
+{
+
+ int i;
+ scc_enet_t *pram_ptr;
+
+ volatile immap_t *immr = (immap_t *)CFG_IMMR;
+
+#if defined(CONFIG_FADS)
+#if defined(CONFIG_MPC860T)
+ /* The FADS860T doesn't use the MODEM_EN or DATA_VOICE signals. */
+ *((uint *) BCSR4) &= ~BCSR4_ETHLOOP;
+ *((uint *) BCSR4) |= BCSR4_TFPLDL|BCSR4_TPSQEL;
+ *((uint *) BCSR1) &= ~BCSR1_ETHEN;
+#else
+ *((uint *) BCSR4) &= ~(BCSR4_ETHLOOP|BCSR4_MODEM_EN);
+ *((uint *) BCSR4) |= BCSR4_TFPLDL|BCSR4_TPSQEL|BCSR4_DATA_VOICE;
+ *((uint *) BCSR1) &= ~BCSR1_ETHEN;
+#endif
+#endif
+
+ pram_ptr = (scc_enet_t *)&(immr->im_cpm.cp_dparam[PROFF_ENET]);
+
+ rxIdx = 0;
+ txIdx = 0;
+
+#ifdef CFG_ALLOC_DPRAM
+ rtx = (RTXBD *) (immr->im_cpm.cp_dpmem +
+ dpram_alloc_align(sizeof(RTXBD), 8));
+#else
+ rtx = (RTXBD *) (immr->im_cpm.cp_dpmem + CPM_SCC_BASE);
+#endif /* 0 */
+
+#if (defined(PA_ENET_RXD) && defined(PA_ENET_TXD))
+ /* Configure port A pins for Txd and Rxd.
+ */
+ immr->im_ioport.iop_papar |= (PA_ENET_RXD | PA_ENET_TXD);
+ immr->im_ioport.iop_padir &= ~(PA_ENET_RXD | PA_ENET_TXD);
+ immr->im_ioport.iop_paodr &= ~PA_ENET_TXD;
+#elif (defined(PB_ENET_RXD) && defined(PB_ENET_TXD))
+ /* Configure port B pins for Txd and Rxd.
+ */
+ immr->im_cpm.cp_pbpar |= (PB_ENET_RXD | PB_ENET_TXD);
+ immr->im_cpm.cp_pbdir &= ~(PB_ENET_RXD | PB_ENET_TXD);
+ immr->im_cpm.cp_pbodr &= ~PB_ENET_TXD;
+#else
+#error Configuration Error: exactly ONE of PA_ENET_[RT]XD, PB_ENET_[RT]XD must be defined
+#endif
+
+#if defined(PC_ENET_LBK)
+ /* Configure port C pins to disable External Loopback
+ */
+ immr->im_ioport.iop_pcpar &= ~PC_ENET_LBK;
+ immr->im_ioport.iop_pcdir |= PC_ENET_LBK;
+ immr->im_ioport.iop_pcso &= ~PC_ENET_LBK;
+ immr->im_ioport.iop_pcdat &= ~PC_ENET_LBK; /* Disable Loopback */
+#endif /* PC_ENET_LBK */
+
+ /* Configure port C pins to enable CLSN and RENA.
+ */
+ immr->im_ioport.iop_pcpar &= ~(PC_ENET_CLSN | PC_ENET_RENA);
+ immr->im_ioport.iop_pcdir &= ~(PC_ENET_CLSN | PC_ENET_RENA);
+ immr->im_ioport.iop_pcso |= (PC_ENET_CLSN | PC_ENET_RENA);
+
+ /* Configure port A for TCLK and RCLK.
+ */
+ immr->im_ioport.iop_papar |= (PA_ENET_TCLK | PA_ENET_RCLK);
+ immr->im_ioport.iop_padir &= ~(PA_ENET_TCLK | PA_ENET_RCLK);
+
+ /*
+ * Configure Serial Interface clock routing -- see section 16.7.5.3
+ * First, clear all SCC bits to zero, then set the ones we want.
+ */
+
+ immr->im_cpm.cp_sicr &= ~SICR_ENET_MASK;
+ immr->im_cpm.cp_sicr |= SICR_ENET_CLKRT;
+
+
+ /*
+ * Initialize SDCR -- see section 16.9.23.7
+ * SDMA configuration register
+ */
+ immr->im_siu_conf.sc_sdcr = 0x01;
+
+
+ /*
+ * Setup SCC Ethernet Parameter RAM
+ */
+
+ pram_ptr->sen_genscc.scc_rfcr = 0x18; /* Normal Operation and Mot byte ordering */
+ pram_ptr->sen_genscc.scc_tfcr = 0x18; /* Mot byte ordering, Normal access */
+
+ pram_ptr->sen_genscc.scc_mrblr = DBUF_LENGTH; /* max. ET package len 1520 */
+
+ pram_ptr->sen_genscc.scc_rbase = (unsigned int)(&rtx->rxbd[0]); /* Set RXBD tbl start at Dual Port */
+ pram_ptr->sen_genscc.scc_tbase = (unsigned int)(&rtx->txbd[0]); /* Set TXBD tbl start at Dual Port */
+
+ /*
+ * Setup Receiver Buffer Descriptors (13.14.24.18)
+ * Settings:
+ * Empty, Wrap
+ */
+
+ for (i = 0; i < PKTBUFSRX; i++)
+ {
+ rtx->rxbd[i].cbd_sc = BD_ENET_RX_EMPTY;
+ rtx->rxbd[i].cbd_datlen = 0; /* Reset */
+ rtx->rxbd[i].cbd_bufaddr = (uint)NetRxPackets[i];
+ }
+
+ rtx->rxbd[PKTBUFSRX - 1].cbd_sc |= BD_ENET_RX_WRAP;
+
+ /*
+ * Setup Ethernet Transmitter Buffer Descriptors (13.14.24.19)
+ * Settings:
+ * Add PADs to Short FRAMES, Wrap, Last, Tx CRC
+ */
+
+ for (i = 0; i < TX_BUF_CNT; i++)
+ {
+ rtx->txbd[i].cbd_sc = (BD_ENET_TX_PAD | BD_ENET_TX_LAST | BD_ENET_TX_TC);
+ rtx->txbd[i].cbd_datlen = 0; /* Reset */
+ rtx->txbd[i].cbd_bufaddr = (uint) (&txbuf[0]);
+ }
+
+ rtx->txbd[TX_BUF_CNT - 1].cbd_sc |= BD_ENET_TX_WRAP;
+
+ /*
+ * Enter Command: Initialize Rx Params for SCC
+ */
+
+ do { /* Spin until ready to issue command */
+ __asm__ ("eieio");
+ } while (immr->im_cpm.cp_cpcr & CPM_CR_FLG);
+ /* Issue command */
+ immr->im_cpm.cp_cpcr = ((CPM_CR_INIT_RX << 8) | (CPM_CR_ENET << 4) | CPM_CR_FLG);
+ do { /* Spin until command processed */
+ __asm__ ("eieio");
+ } while (immr->im_cpm.cp_cpcr & CPM_CR_FLG);
+
+ /*
+ * Ethernet Specific Parameter RAM
+ * see table 13-16, pg. 660,
+ * pg. 681 (example with suggested settings)
+ */
+
+ pram_ptr->sen_cpres = ~(0x0); /* Preset CRC */
+ pram_ptr->sen_cmask = 0xdebb20e3; /* Constant Mask for CRC */
+ pram_ptr->sen_crcec = 0x0; /* Error Counter CRC (unused) */
+ pram_ptr->sen_alec = 0x0; /* Alignment Error Counter (unused) */
+ pram_ptr->sen_disfc = 0x0; /* Discard Frame Counter (unused) */
+ pram_ptr->sen_pads = 0x8888; /* Short Frame PAD Characters */
+
+ pram_ptr->sen_retlim = 15; /* Retry Limit Threshold */
+ pram_ptr->sen_maxflr = 1518; /* MAX Frame Length Register */
+ pram_ptr->sen_minflr = 64; /* MIN Frame Length Register */
+
+ pram_ptr->sen_maxd1 = DBUF_LENGTH; /* MAX DMA1 Length Register */
+ pram_ptr->sen_maxd2 = DBUF_LENGTH; /* MAX DMA2 Length Register */
+
+ pram_ptr->sen_gaddr1 = 0x0; /* Group Address Filter 1 (unused) */
+ pram_ptr->sen_gaddr2 = 0x0; /* Group Address Filter 2 (unused) */
+ pram_ptr->sen_gaddr3 = 0x0; /* Group Address Filter 3 (unused) */
+ pram_ptr->sen_gaddr4 = 0x0; /* Group Address Filter 4 (unused) */
+
+#define ea eth_get_dev()->enetaddr
+ pram_ptr->sen_paddrh = (ea[5] << 8) + ea[4];
+ pram_ptr->sen_paddrm = (ea[3] << 8) + ea[2];
+ pram_ptr->sen_paddrl = (ea[1] << 8) + ea[0];
+#undef ea
+
+ pram_ptr->sen_pper = 0x0; /* Persistence (unused) */
+ pram_ptr->sen_iaddr1 = 0x0; /* Individual Address Filter 1 (unused) */
+ pram_ptr->sen_iaddr2 = 0x0; /* Individual Address Filter 2 (unused) */
+ pram_ptr->sen_iaddr3 = 0x0; /* Individual Address Filter 3 (unused) */
+ pram_ptr->sen_iaddr4 = 0x0; /* Individual Address Filter 4 (unused) */
+ pram_ptr->sen_taddrh = 0x0; /* Tmp Address (MSB) (unused) */
+ pram_ptr->sen_taddrm = 0x0; /* Tmp Address (unused) */
+ pram_ptr->sen_taddrl = 0x0; /* Tmp Address (LSB) (unused) */
+
+ /*
+ * Enter Command: Initialize Tx Params for SCC
+ */
+
+ do { /* Spin until ready to issue command */
+ __asm__ ("eieio");
+ } while (immr->im_cpm.cp_cpcr & CPM_CR_FLG);
+ /* Issue command */
+ immr->im_cpm.cp_cpcr = ((CPM_CR_INIT_TX << 8) | (CPM_CR_ENET << 4) | CPM_CR_FLG);
+ do { /* Spin until command processed */
+ __asm__ ("eieio");
+ } while (immr->im_cpm.cp_cpcr & CPM_CR_FLG);
+
+ /*
+ * Mask all Events in SCCM - we use polling mode
+ */
+ immr->im_cpm.cp_scc[SCC_ENET].scc_sccm = 0;
+
+ /*
+ * Clear Events in SCCE -- Clear bits by writing 1's
+ */
+
+ immr->im_cpm.cp_scc[SCC_ENET].scc_scce = ~(0x0);
+
+
+ /*
+ * Initialize GSMR High 32-Bits
+ * Settings: Normal Mode
+ */
+
+ immr->im_cpm.cp_scc[SCC_ENET].scc_gsmrh = 0;
+
+ /*
+ * Initialize GSMR Low 32-Bits, but do not Enable Transmit/Receive
+ * Settings:
+ * TCI = Invert
+ * TPL = 48 bits
+ * TPP = Repeating 10's
+ * MODE = Ethernet
+ */
+
+ immr->im_cpm.cp_scc[SCC_ENET].scc_gsmrl = ( SCC_GSMRL_TCI | \
+ SCC_GSMRL_TPL_48 | \
+ SCC_GSMRL_TPP_10 | \
+ SCC_GSMRL_MODE_ENET);
+
+ /*
+ * Initialize the DSR -- see section 13.14.4 (pg. 513) v0.4
+ */
+
+ immr->im_cpm.cp_scc[SCC_ENET].scc_dsr = 0xd555;
+
+ /*
+ * Initialize the PSMR
+ * Settings:
+ * CRC = 32-Bit CCITT
+ * NIB = Begin searching for SFD 22 bits after RENA
+ * FDE = Full Duplex Enable
+ * LPB = Loopback Enable (Needed when FDE is set)
+ * BRO = Reject broadcast packets
+ * PROMISCOUS = Catch all packets regardless of dest. MAC adress
+ */
+ immr->im_cpm.cp_scc[SCC_ENET].scc_psmr = SCC_PSMR_ENCRC |
+ SCC_PSMR_NIB22 |
+#if defined(CONFIG_SCC_ENET_FULL_DUPLEX)
+ SCC_PSMR_FDE |
+ SCC_PSMR_LPB |
+#endif
+#if defined(CONFIG_SCC_ENET_NO_BROADCAST)
+ SCC_PSMR_BRO |
+#endif
+#if defined(CONFIG_SCC_ENET_PROMISCOUS)
+ SCC_PSMR_PRO |
+#endif
+ 0;
+
+ /*
+ * Configure Ethernet TENA Signal
+ */
+
+#if (defined(PC_ENET_TENA) && !defined(PB_ENET_TENA))
+ immr->im_ioport.iop_pcpar |= PC_ENET_TENA;
+ immr->im_ioport.iop_pcdir &= ~PC_ENET_TENA;
+#elif (defined(PB_ENET_TENA) && !defined(PC_ENET_TENA))
+ immr->im_cpm.cp_pbpar |= PB_ENET_TENA;
+ immr->im_cpm.cp_pbdir |= PB_ENET_TENA;
+#else
+#error Configuration Error: exactly ONE of PB_ENET_TENA, PC_ENET_TENA must be defined
+#endif
+
+#if defined(CONFIG_ADS) && defined(CONFIG_MPC860)
+ /*
+ * Port C is used to control the PHY,MC68160.
+ */
+ immr->im_ioport.iop_pcdir |=
+ (PC_ENET_ETHLOOP | PC_ENET_TPFLDL | PC_ENET_TPSQEL);
+
+ immr->im_ioport.iop_pcdat |= PC_ENET_TPFLDL;
+ immr->im_ioport.iop_pcdat &= ~(PC_ENET_ETHLOOP | PC_ENET_TPSQEL);
+ *((uint *) BCSR1) &= ~BCSR1_ETHEN;
+#endif /* MPC860ADS */
+
+#if defined(CONFIG_AMX860)
+ /*
+ * Port B is used to control the PHY,MC68160.
+ */
+ immr->im_cpm.cp_pbdir |=
+ (PB_ENET_ETHLOOP | PB_ENET_TPFLDL | PB_ENET_TPSQEL);
+
+ immr->im_cpm.cp_pbdat |= PB_ENET_TPFLDL;
+ immr->im_cpm.cp_pbdat &= ~(PB_ENET_ETHLOOP | PB_ENET_TPSQEL);
+
+ immr->im_ioport.iop_pddir |= PD_ENET_ETH_EN;
+ immr->im_ioport.iop_pddat &= ~PD_ENET_ETH_EN;
+#endif /* AMX860 */
+
+#ifdef CONFIG_RPXCLASSIC
+ *((uchar *)BCSR0) &= ~BCSR0_ETHLPBK;
+ *((uchar *)BCSR0) |= (BCSR0_ETHEN | BCSR0_COLTEST | BCSR0_FULLDPLX);
+#endif
+
+#ifdef CONFIG_RPXLITE
+ *((uchar *)BCSR0) |= BCSR0_ETHEN ;
+#endif
+
+#ifdef CONFIG_MBX
+ board_ether_init();
+#endif
+
+#if defined(CONFIG_NETVIA)
+#if defined(PB_ENET_PDN)
+ immr->im_cpm.cp_pbpar &= ~PB_ENET_PDN;
+ immr->im_cpm.cp_pbdir |= PB_ENET_PDN;
+ immr->im_cpm.cp_pbdat |= PB_ENET_PDN;
+#elif defined(PC_ENET_PDN)
+ immr->im_cpm.cp_pcpar &= ~PC_ENET_PDN;
+ immr->im_cpm.cp_pcdir |= PC_ENET_PDN;
+ immr->im_cpm.cp_pcdat |= PC_ENET_PDN;
+#endif
+#endif
+
+ /*
+ * Set the ENT/ENR bits in the GSMR Low -- Enable Transmit/Receive
+ */
+
+ immr->im_cpm.cp_scc[SCC_ENET].scc_gsmrl |= (SCC_GSMRL_ENR | SCC_GSMRL_ENT);
+
+ /*
+ * Work around transmit problem with first eth packet
+ */
+#if defined (CONFIG_FADS)
+ udelay(10000); /* wait 10 ms */
+#elif defined (CONFIG_AMX860) || defined(CONFIG_RPXCLASSIC)
+ udelay(100000); /* wait 100 ms */
+#endif
+
+ return 1;
+}
+
+
+
+static void scc_halt(struct eth_device* dev)
+{
+ volatile immap_t *immr = (immap_t *)CFG_IMMR;
+ immr->im_cpm.cp_scc[SCC_ENET].scc_gsmrl &= ~(SCC_GSMRL_ENR | SCC_GSMRL_ENT);
+}
+
+#if 0
+void restart(void)
+{
+ volatile immap_t *immr = (immap_t *)CFG_IMMR;
+ immr->im_cpm.cp_scc[SCC_ENET].scc_gsmrl |= (SCC_GSMRL_ENR | SCC_GSMRL_ENT);
+}
+#endif
+
+#endif /* CFG_CMD_NET, SCC_ENET */
generated by cgit v1.2.3-70-g09d2 (git 2.51.2) at 2025-11-04 09:26:26 +0000