[5edbffe] | 1 | /* |
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| 2 | * RTEMS/TCPIP driver for MPC8260 SCC |
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| 3 | * |
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| 4 | * Modified for MPC8260 by Andy Dachs <a.dachs@sstl.co.uk> |
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| 5 | * Surrey Satellite Technology Limited |
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| 6 | * |
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| 7 | * On the ADS board the ethernet interface is connected to FCC2 |
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| 8 | * but in my application I want TCP over HDLC (see README) |
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| 9 | * so will use SCC3 as the network interface. I have other plans |
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| 10 | * for the FCCs so am unlikely to add true ethernet support to |
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| 11 | * this BSP. Contributions welcome! |
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| 12 | * |
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| 13 | * Modified for MPC860 by Jay Monkman (jmonkman@frasca.com) |
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| 14 | * |
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| 15 | * This supports ethernet on either SCC1 or the FEC of the MPC860T. |
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| 16 | * Right now, we only do 10 Mbps, even with the FEC. The function |
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| 17 | * rtems_m860_enet_driver_attach determines which one to use. Currently, |
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| 18 | * only one may be used at a time. |
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| 19 | * |
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| 20 | * W. Eric Norum |
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| 21 | * Saskatchewan Accelerator Laboratory |
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| 22 | * University of Saskatchewan |
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| 23 | * Saskatoon, Saskatchewan, CANADA |
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| 24 | * eric@skatter.usask.ca |
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| 25 | * |
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| 26 | * $Id$ |
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| 27 | */ |
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| 28 | #include <bsp.h> |
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| 29 | #include <bsp/irq.h> |
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| 30 | #include <mpc8260.h> |
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| 31 | #include <mpc8260/cpm.h> |
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| 32 | #include <stdio.h> |
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| 33 | #include <rtems/error.h> |
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| 34 | #include <rtems/rtems_bsdnet.h> |
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[1628414] | 35 | #include <rtems/bspIo.h> |
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[5edbffe] | 36 | |
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| 37 | #include <sys/param.h> |
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| 38 | #include <sys/mbuf.h> |
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| 39 | #include <sys/socket.h> |
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| 40 | #include <sys/sockio.h> |
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| 41 | |
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| 42 | #include <net/if.h> |
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| 43 | |
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| 44 | #include <netinet/in.h> |
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| 45 | #include <netinet/if_ether.h> |
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| 46 | |
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| 47 | #include "if_hdlcsubr.h" |
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| 48 | |
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| 49 | /* |
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| 50 | * Number of interfaces supported by this driver |
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| 51 | */ |
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| 52 | #define NIFACES 1 |
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| 53 | |
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| 54 | /* |
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| 55 | * Default number of buffer descriptors set aside for this driver. |
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| 56 | * The number of transmit buffer descriptors has to be quite large |
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| 57 | * since a single frame often uses four or more buffer descriptors. |
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| 58 | */ |
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| 59 | #define RX_BUF_COUNT 32 |
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| 60 | #define TX_BUF_COUNT 8 |
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| 61 | #define TX_BD_PER_BUF 4 |
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| 62 | |
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| 63 | #define INET_ADDR_MAX_BUF_SIZE (sizeof "255.255.255.255") |
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| 64 | |
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| 65 | |
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| 66 | extern void m8xx_dump_brgs( void ); |
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| 67 | |
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| 68 | /* |
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| 69 | * RTEMS event used by interrupt handler to signal daemons. |
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| 70 | * This must *not* be the same event used by the TCP/IP task synchronization. |
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| 71 | */ |
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| 72 | #define INTERRUPT_EVENT RTEMS_EVENT_1 |
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| 73 | |
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| 74 | /* |
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| 75 | * RTEMS event used to start transmit daemon. |
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| 76 | * This must not be the same as INTERRUPT_EVENT. |
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| 77 | */ |
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| 78 | #define START_TRANSMIT_EVENT RTEMS_EVENT_2 |
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| 79 | |
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| 80 | |
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| 81 | /* |
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| 82 | * Receive buffer size -- Allow for a full ethernet packet plus CRC (1518). |
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| 83 | * Round off to nearest multiple of RBUF_ALIGN. |
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| 84 | */ |
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| 85 | #define MAX_MTU_SIZE 1518 |
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| 86 | /*#define MAX_MTU_SIZE 2050*/ |
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| 87 | #define RBUF_ALIGN 4 |
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| 88 | #define RBUF_SIZE ((MAX_MTU_SIZE + RBUF_ALIGN) & ~RBUF_ALIGN) |
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| 89 | |
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| 90 | #if (MCLBYTES < RBUF_SIZE) |
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| 91 | # error "Driver must have MCLBYTES > RBUF_SIZE" |
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| 92 | #endif |
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| 93 | |
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| 94 | /* |
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| 95 | * Per-device data |
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| 96 | */ |
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| 97 | struct m8260_hdlc_struct { |
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| 98 | struct ifnet ac_if; |
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| 99 | struct mbuf **rxMbuf; |
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| 100 | struct mbuf **txMbuf; |
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| 101 | int acceptBroadcast; |
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| 102 | int rxBdCount; |
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| 103 | int txBdCount; |
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| 104 | int txBdHead; |
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| 105 | int txBdTail; |
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| 106 | int txBdActiveCount; |
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| 107 | m8260BufferDescriptor_t *rxBdBase; |
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| 108 | m8260BufferDescriptor_t *txBdBase; |
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| 109 | rtems_id rxDaemonTid; |
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| 110 | rtems_id txDaemonTid; |
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| 111 | |
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| 112 | /* |
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| 113 | * Statistics |
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| 114 | */ |
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| 115 | unsigned long rxNotFirst; |
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| 116 | unsigned long rxNotLast; |
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| 117 | unsigned long rxInterrupts; |
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| 118 | unsigned long rxGiant; |
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| 119 | unsigned long rxNonOctet; |
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| 120 | unsigned long rxAbort; |
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| 121 | unsigned long rxBadCRC; |
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| 122 | unsigned long rxOverrun; |
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| 123 | unsigned long rxLostCarrier; |
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| 124 | unsigned long txInterrupts; |
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| 125 | unsigned long txUnderrun; |
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| 126 | unsigned long txLostCarrier; |
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| 127 | unsigned long txRawWait; |
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| 128 | }; |
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| 129 | static struct m8260_hdlc_struct hdlc_driver[NIFACES]; |
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| 130 | |
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| 131 | |
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| 132 | static void m8xx_scc3_hdlc_on(const rtems_irq_connect_data* ptr) |
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| 133 | { |
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| 134 | } |
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| 135 | |
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| 136 | static void m8xx_scc3_hdlc_off(const rtems_irq_connect_data* ptr) |
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| 137 | { |
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| 138 | /* |
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| 139 | * Please put relevant code there |
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| 140 | */ |
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| 141 | } |
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| 142 | |
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| 143 | static int m8xx_scc3_hdlc_isOn(const rtems_irq_connect_data* ptr) |
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| 144 | { |
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| 145 | return BSP_irq_enabled_at_cpm (ptr->name); |
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| 146 | } |
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| 147 | |
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| 148 | /* |
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| 149 | * SCC interrupt handler |
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| 150 | * TBD: Can we work out which SCC generated the interrupt from the |
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| 151 | * value of v? If so we can use the same handler for multiple |
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| 152 | * SCCs. |
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| 153 | */ |
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| 154 | static void |
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| 155 | m8xx_scc3_interrupt_handler () |
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| 156 | { |
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| 157 | /* |
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| 158 | * Frame received? |
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| 159 | */ |
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| 160 | if ((m8260.scc3.sccm & M8260_SCCE_RXF) && |
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| 161 | (m8260.scc3.scce & M8260_SCCE_RXF) ) { |
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| 162 | m8260.scc3.scce = M8260_SCCE_RXF; |
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| 163 | /* m8260.scc3.sccm &= ~M8260_SCCE_RXF; */ |
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| 164 | hdlc_driver[0].rxInterrupts++; |
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| 165 | rtems_event_send (hdlc_driver[0].rxDaemonTid, INTERRUPT_EVENT); |
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| 166 | /* |
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| 167 | printk( "Rx " ); |
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| 168 | */ |
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| 169 | } |
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| 170 | |
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| 171 | /* |
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| 172 | * Buffer transmitted or transmitter error? |
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| 173 | */ |
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| 174 | if ((m8260.scc3.sccm & (M8260_SCCE_TX | M8260_SCCE_TXE) ) && |
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| 175 | (m8260.scc3.scce & (M8260_SCCE_TX | M8260_SCCE_TXE) )) { |
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| 176 | m8260.scc3.scce = M8260_SCCE_TX | M8260_SCCE_TXE; |
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| 177 | /* m8260.scc3.sccm &= ~(M8260_SCCE_TX | M8260_SCCE_TXE); */ |
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| 178 | hdlc_driver[0].txInterrupts++; |
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| 179 | rtems_event_send (hdlc_driver[0].txDaemonTid, INTERRUPT_EVENT); |
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| 180 | /* |
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| 181 | printk( "Tx " ); |
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| 182 | */ |
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| 183 | } |
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| 184 | |
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| 185 | #if 0 |
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| 186 | m8260.sipnr_l = M8260_SIMASK_SCC3; /* Clear SCC3 interrupt-in-service bit */ |
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| 187 | #endif |
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| 188 | } |
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| 189 | |
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| 190 | |
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| 191 | static rtems_irq_connect_data hdlcSCC3IrqData = { |
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| 192 | BSP_CPM_IRQ_SCC3, |
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| 193 | (rtems_irq_hdl) m8xx_scc3_interrupt_handler, |
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| 194 | (rtems_irq_enable) m8xx_scc3_hdlc_on, |
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| 195 | (rtems_irq_disable) m8xx_scc3_hdlc_off, |
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| 196 | (rtems_irq_is_enabled)m8xx_scc3_hdlc_isOn |
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| 197 | }; |
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| 198 | |
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| 199 | |
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| 200 | /* |
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| 201 | * Initialize the SCC hardware |
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| 202 | * Configure I/O ports for SCC3 |
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| 203 | * Internal Tx clock, External Rx clock |
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| 204 | */ |
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| 205 | static void |
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| 206 | m8260_scc_initialize_hardware (struct m8260_hdlc_struct *sc) |
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| 207 | { |
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| 208 | int i; |
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| 209 | int brg; |
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| 210 | |
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| 211 | /* |
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| 212 | unsigned char *hwaddr; |
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| 213 | */ |
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| 214 | rtems_status_code status; |
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| 215 | /* |
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| 216 | rtems_isr_entry old_handler; |
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| 217 | */ |
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| 218 | |
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| 219 | /* RxD PB14 */ |
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| 220 | m8260.pparb |= 0x00020000; |
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| 221 | m8260.psorb &= ~0x00020000; |
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| 222 | m8260.pdirb &= ~0x00020000; |
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| 223 | |
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| 224 | /* RxC (CLK5) PC27 */ |
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| 225 | m8260.pparc |= 0x00000010; |
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| 226 | m8260.psorc &= ~0x00000010; |
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| 227 | m8260.pdirc &= ~0x00000010; |
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| 228 | |
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| 229 | /* TxD PD24 and TxC PD10 (BRG4) */ |
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| 230 | m8260.ppard |= 0x00200080; |
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| 231 | m8260.psord |= 0x00200000; |
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| 232 | m8260.psord &= ~0x00000080; |
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| 233 | m8260.pdird |= 0x00200080; |
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| 234 | |
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| 235 | |
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| 236 | /* External Rx Clock from CLK5 */ |
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| 237 | if( m8xx_get_clk( M8xx_CLK_5 ) == -1 ) |
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| 238 | printk( "Error allocating CLK5 for network device.\n" ); |
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| 239 | else |
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| 240 | m8260.cmxscr |= 0x00002000; |
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| 241 | |
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| 242 | /* Internal Tx Clock from BRG4 */ |
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| 243 | if( (brg = m8xx_get_brg(M8xx_BRG_4, 8000000 )) == -1 ) |
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| 244 | printk( "Error allocating BRG for network device\n" ); |
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| 245 | else |
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| 246 | m8260.cmxscr |= ((unsigned)brg << 8); |
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| 247 | |
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| 248 | |
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| 249 | |
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| 250 | /* |
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| 251 | * Allocate mbuf pointers |
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| 252 | */ |
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| 253 | sc->rxMbuf = malloc (sc->rxBdCount * sizeof *sc->rxMbuf, |
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| 254 | M_MBUF, M_NOWAIT); |
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| 255 | sc->txMbuf = malloc (sc->txBdCount * sizeof *sc->txMbuf, |
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| 256 | M_MBUF, M_NOWAIT); |
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| 257 | if (!sc->rxMbuf || !sc->txMbuf) |
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| 258 | rtems_panic ("No memory for mbuf pointers"); |
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| 259 | |
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| 260 | /* |
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| 261 | * Set receiver and transmitter buffer descriptor bases |
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| 262 | */ |
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| 263 | sc->rxBdBase = m8xx_bd_allocate (sc->rxBdCount); |
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| 264 | sc->txBdBase = m8xx_bd_allocate (sc->txBdCount); |
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| 265 | |
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| 266 | m8260.scc3p.rbase = (char *)sc->rxBdBase - (char *)&m8260; |
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| 267 | m8260.scc3p.tbase = (char *)sc->txBdBase - (char *)&m8260; |
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| 268 | |
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| 269 | /* |
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| 270 | * Send "Init parameters" command |
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| 271 | */ |
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| 272 | |
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| 273 | m8xx_cp_execute_cmd (M8260_CR_OP_INIT_RX_TX | M8260_CR_SCC3 ); |
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| 274 | |
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| 275 | /* |
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| 276 | * Set receive and transmit function codes |
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| 277 | */ |
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| 278 | m8260.scc3p.rfcr = M8260_RFCR_MOT | M8260_RFCR_60X_BUS; |
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| 279 | m8260.scc3p.tfcr = M8260_TFCR_MOT | M8260_TFCR_60X_BUS; |
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| 280 | |
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| 281 | /* |
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| 282 | * Set maximum receive buffer length |
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| 283 | */ |
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| 284 | m8260.scc3p.mrblr = RBUF_SIZE; |
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| 285 | |
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| 286 | |
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| 287 | m8260.scc3p.un.hdlc.c_mask = 0xF0B8; |
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| 288 | m8260.scc3p.un.hdlc.c_pres = 0xFFFF; |
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| 289 | m8260.scc3p.un.hdlc.disfc = 0; |
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| 290 | m8260.scc3p.un.hdlc.crcec = 0; |
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| 291 | m8260.scc3p.un.hdlc.abtsc = 0; |
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| 292 | m8260.scc3p.un.hdlc.nmarc = 0; |
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| 293 | m8260.scc3p.un.hdlc.retrc = 0; |
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| 294 | m8260.scc3p.un.hdlc.rfthr = 1; |
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| 295 | m8260.scc3p.un.hdlc.mflr = RBUF_SIZE; |
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| 296 | |
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| 297 | m8260.scc3p.un.hdlc.hmask = 0x0000; /* promiscuous */ |
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| 298 | |
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| 299 | m8260.scc3p.un.hdlc.haddr1 = 0xFFFF; /* Broadcast address */ |
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| 300 | m8260.scc3p.un.hdlc.haddr2 = 0xFFFF; /* Station address */ |
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| 301 | m8260.scc3p.un.hdlc.haddr3 = 0xFFFF; /* Dummy */ |
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| 302 | m8260.scc3p.un.hdlc.haddr4 = 0xFFFF; /* Dummy */ |
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| 303 | |
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| 304 | |
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| 305 | /* |
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| 306 | * Send "Init parameters" command |
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| 307 | */ |
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| 308 | /* |
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| 309 | m8xx_cp_execute_cmd (M8260_CR_OP_INIT_RX_TX | M8260_CR_SCC3 ); |
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| 310 | */ |
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| 311 | |
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| 312 | /* |
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| 313 | * Set up receive buffer descriptors |
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| 314 | */ |
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| 315 | for (i = 0 ; i < sc->rxBdCount ; i++) { |
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| 316 | (sc->rxBdBase + i)->status = 0; |
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| 317 | } |
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| 318 | |
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| 319 | /* |
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| 320 | * Set up transmit buffer descriptors |
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| 321 | */ |
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| 322 | for (i = 0 ; i < sc->txBdCount ; i++) { |
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| 323 | (sc->txBdBase + i)->status = 0; |
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| 324 | sc->txMbuf[i] = NULL; |
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| 325 | } |
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| 326 | sc->txBdHead = sc->txBdTail = 0; |
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| 327 | sc->txBdActiveCount = 0; |
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| 328 | |
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| 329 | |
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| 330 | m8260.scc3.sccm = 0; /* No interrupts unmasked till necessary */ |
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| 331 | |
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| 332 | /* |
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| 333 | * Clear any outstanding events |
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| 334 | */ |
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| 335 | m8260.scc3.scce = 0xFFFF; |
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| 336 | |
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| 337 | /* |
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| 338 | * Set up interrupts |
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| 339 | */ |
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| 340 | status = BSP_install_rtems_irq_handler (&hdlcSCC3IrqData); |
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| 341 | /* |
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| 342 | printk( "status = %d, Success = %d\n", status, RTEMS_SUCCESSFUL ); |
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| 343 | */ |
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| 344 | if (status != 1 /*RTEMS_SUCCESSFUL*/ ) { |
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| 345 | rtems_panic ("Can't attach M8260 SCC3 interrupt handler: %s\n", |
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| 346 | rtems_status_text (status)); |
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| 347 | } |
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| 348 | m8260.scc3.sccm = 0; /* No interrupts unmasked till necessary */ |
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| 349 | |
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| 350 | #if 0 |
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| 351 | /* |
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| 352 | * Set up interrupts |
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| 353 | */ |
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| 354 | status = rtems_interrupt_catch (m8260_scc3_interrupt_handler, |
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| 355 | PPC_IRQ_CPM_SCC3, |
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| 356 | &old_handler); |
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| 357 | if (status != RTEMS_SUCCESSFUL) { |
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| 358 | rtems_panic ("Can't attach M8260 SCC3 interrupt handler: %s\n", |
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| 359 | rtems_status_text (status)); |
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| 360 | } |
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| 361 | |
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| 362 | m8260.sipnr_l = M8260_SIMASK_SCC3; /* clear pending event */ |
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| 363 | m8260.simr_l |= M8260_SIMASK_SCC3; /* Enable SCC interrupt */ |
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| 364 | |
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| 365 | #endif |
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| 366 | |
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| 367 | |
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| 368 | |
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| 369 | m8260.scc3.gsmr_h = 0; |
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| 370 | m8260.scc3.gsmr_l = 0x10000000; |
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| 371 | m8260.scc3.dsr = 0x7E7E; /* flag character */ |
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| 372 | m8260.scc3.psmr = 0x2000; /* 2 flags between Tx'd frames */ |
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| 373 | |
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| 374 | /* printk("scc3 init\n" ); */ |
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| 375 | |
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| 376 | m8260.scc3.gsmr_l |= 0x00000030; /* Set ENR and ENT to enable Rx and Tx */ |
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| 377 | |
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| 378 | } |
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| 379 | |
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| 380 | |
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| 381 | |
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| 382 | /* |
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| 383 | * Soak up buffer descriptors that have been sent |
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| 384 | * Note that a buffer descriptor can't be retired as soon as it becomes |
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| 385 | * ready. The MC68360 Errata (May 96) says that, "If an Ethernet frame is |
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| 386 | * made up of multiple buffers, the user should not reuse the first buffer |
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| 387 | * descriptor until the last buffer descriptor of the frame has had its |
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| 388 | * ready bit cleared by the CPM". |
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| 389 | */ |
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| 390 | static void |
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| 391 | m8260Enet_retire_tx_bd (struct m8260_hdlc_struct *sc) |
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| 392 | { |
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[2a832d8] | 393 | uint16_t status; |
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[5edbffe] | 394 | int i; |
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| 395 | int nRetired; |
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| 396 | struct mbuf *m, *n; |
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| 397 | |
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| 398 | i = sc->txBdTail; |
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| 399 | nRetired = 0; |
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| 400 | while ((sc->txBdActiveCount != 0) |
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| 401 | && (((status = (sc->txBdBase + i)->status) & M8260_BD_READY) == 0)) { |
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| 402 | /* |
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| 403 | * See if anything went wrong |
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| 404 | */ |
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| 405 | if (status & (M8260_BD_UNDERRUN | |
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| 406 | M8260_BD_CTS_LOST)) { |
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| 407 | /* |
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| 408 | * Check for errors which stop the transmitter. |
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| 409 | */ |
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| 410 | if( status & M8260_BD_UNDERRUN ) { |
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| 411 | hdlc_driver[0].txUnderrun++; |
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| 412 | |
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| 413 | /* |
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| 414 | * Restart the transmitter |
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| 415 | */ |
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| 416 | /* FIXME: this should get executed only if using the SCC */ |
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| 417 | m8xx_cp_execute_cmd (M8260_CR_OP_RESTART_TX | M8260_CR_SCC3); |
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| 418 | } |
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| 419 | if (status & M8260_BD_CTS_LOST) |
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| 420 | hdlc_driver[0].txLostCarrier++; |
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| 421 | } |
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| 422 | nRetired++; |
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| 423 | if (status & M8260_BD_LAST) { |
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| 424 | /* |
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| 425 | * A full frame has been transmitted. |
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| 426 | * Free all the associated buffer descriptors. |
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| 427 | */ |
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| 428 | sc->txBdActiveCount -= nRetired; |
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| 429 | while (nRetired) { |
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| 430 | nRetired--; |
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| 431 | m = sc->txMbuf[sc->txBdTail]; |
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| 432 | MFREE (m, n); |
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| 433 | if (++sc->txBdTail == sc->txBdCount) |
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| 434 | sc->txBdTail = 0; |
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| 435 | } |
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| 436 | } |
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| 437 | if (++i == sc->txBdCount) |
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| 438 | i = 0; |
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| 439 | } |
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| 440 | } |
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| 441 | |
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| 442 | /* |
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| 443 | * reader task |
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| 444 | */ |
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| 445 | static void |
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| 446 | scc_rxDaemon (void *arg) |
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| 447 | { |
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| 448 | struct m8260_hdlc_struct *sc = (struct m8260_hdlc_struct *)arg; |
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| 449 | struct ifnet *ifp = &sc->ac_if; |
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| 450 | struct mbuf *m; |
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[2a832d8] | 451 | uint16_t status; |
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[5edbffe] | 452 | m8260BufferDescriptor_t *rxBd; |
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| 453 | int rxBdIndex; |
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| 454 | |
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| 455 | /* |
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| 456 | * Allocate space for incoming packets and start reception |
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| 457 | */ |
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| 458 | for (rxBdIndex = 0 ; ;) { |
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| 459 | rxBd = sc->rxBdBase + rxBdIndex; |
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| 460 | MGETHDR (m, M_WAIT, MT_DATA); |
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| 461 | MCLGET (m, M_WAIT); |
---|
| 462 | m->m_pkthdr.rcvif = ifp; |
---|
| 463 | sc->rxMbuf[rxBdIndex] = m; |
---|
| 464 | rxBd->buffer = mtod (m, void *); |
---|
| 465 | rxBd->status = M8260_BD_EMPTY | M8260_BD_INTERRUPT; |
---|
| 466 | if (++rxBdIndex == sc->rxBdCount) { |
---|
| 467 | rxBd->status |= M8260_BD_WRAP; |
---|
| 468 | break; |
---|
| 469 | } |
---|
| 470 | } |
---|
| 471 | |
---|
| 472 | /* |
---|
| 473 | m8260.scc3.sccm |= M8260_SCCE_RXF; |
---|
| 474 | */ |
---|
| 475 | |
---|
| 476 | /* |
---|
| 477 | * Input packet handling loop |
---|
| 478 | */ |
---|
| 479 | rxBdIndex = 0; |
---|
| 480 | for (;;) { |
---|
| 481 | rxBd = sc->rxBdBase + rxBdIndex; |
---|
| 482 | |
---|
| 483 | /* |
---|
| 484 | * Wait for packet if there's not one ready |
---|
| 485 | */ |
---|
| 486 | if ((status = rxBd->status) & M8260_BD_EMPTY) { |
---|
| 487 | /* |
---|
| 488 | * Clear old events |
---|
| 489 | */ |
---|
| 490 | |
---|
| 491 | m8260.scc3.scce = M8260_SCCE_RXF; |
---|
| 492 | |
---|
| 493 | /* |
---|
| 494 | * Wait for packet |
---|
| 495 | * Note that the buffer descriptor is checked |
---|
| 496 | * *before* the event wait -- this catches the |
---|
| 497 | * possibility that a packet arrived between the |
---|
| 498 | * `if' above, and the clearing of the event register. |
---|
| 499 | */ |
---|
| 500 | while ((status = rxBd->status) & M8260_BD_EMPTY) { |
---|
| 501 | rtems_event_set events; |
---|
| 502 | |
---|
| 503 | /* |
---|
| 504 | * Unmask RXF (Full frame received) event |
---|
| 505 | */ |
---|
| 506 | m8260.scc3.sccm |= M8260_SCCE_RXF; |
---|
| 507 | |
---|
| 508 | /* printk( "Rxdwait "); */ |
---|
| 509 | |
---|
| 510 | rtems_bsdnet_event_receive (INTERRUPT_EVENT, |
---|
| 511 | RTEMS_WAIT|RTEMS_EVENT_ANY, |
---|
| 512 | RTEMS_NO_TIMEOUT, |
---|
| 513 | &events); |
---|
| 514 | |
---|
| 515 | /* printk( "Rxd " ); */ |
---|
| 516 | } |
---|
| 517 | } |
---|
| 518 | |
---|
| 519 | /* |
---|
| 520 | * Check that packet is valid |
---|
| 521 | */ |
---|
| 522 | if ((status & (M8260_BD_LAST | |
---|
| 523 | M8260_BD_FIRST_IN_FRAME | |
---|
| 524 | M8260_BD_LONG | |
---|
| 525 | M8260_BD_NONALIGNED | |
---|
| 526 | M8260_BD_ABORT | |
---|
| 527 | M8260_BD_CRC_ERROR | |
---|
| 528 | M8260_BD_OVERRUN /*| |
---|
| 529 | M8260_BD_CARRIER_LOST*/)) == |
---|
| 530 | (M8260_BD_LAST | |
---|
| 531 | M8260_BD_FIRST_IN_FRAME ) ) { |
---|
| 532 | |
---|
| 533 | /* printk( "RxV " ); */ |
---|
| 534 | |
---|
| 535 | /* |
---|
| 536 | * Invalidate the buffer for this descriptor |
---|
| 537 | */ |
---|
| 538 | |
---|
[37a25cf] | 539 | rtems_cache_invalidate_multiple_data_lines((void *)rxBd->buffer, rxBd->length); |
---|
[5edbffe] | 540 | |
---|
| 541 | m = sc->rxMbuf[rxBdIndex]; |
---|
| 542 | |
---|
| 543 | /* strip off HDLC CRC */ |
---|
[2a832d8] | 544 | m->m_len = m->m_pkthdr.len = rxBd->length - sizeof(uint16_t); |
---|
[5edbffe] | 545 | |
---|
| 546 | hdlc_input( ifp, m ); |
---|
| 547 | |
---|
| 548 | /* |
---|
| 549 | * Allocate a new mbuf |
---|
| 550 | */ |
---|
| 551 | MGETHDR (m, M_WAIT, MT_DATA); |
---|
| 552 | MCLGET (m, M_WAIT); |
---|
| 553 | m->m_pkthdr.rcvif = ifp; |
---|
| 554 | sc->rxMbuf[rxBdIndex] = m; |
---|
| 555 | rxBd->buffer = mtod (m, void *); |
---|
| 556 | } |
---|
| 557 | else { |
---|
| 558 | printk( "RxErr[%04X,%d]", status, rxBd->length ); |
---|
| 559 | /* |
---|
| 560 | * Something went wrong with the reception |
---|
| 561 | */ |
---|
| 562 | if (!(status & M8260_BD_LAST)) |
---|
| 563 | sc->rxNotLast++; |
---|
| 564 | if (!(status & M8260_BD_FIRST_IN_FRAME)) |
---|
| 565 | sc->rxNotFirst++; |
---|
| 566 | |
---|
| 567 | if (status & M8260_BD_LONG) |
---|
| 568 | sc->rxGiant++; |
---|
| 569 | if (status & M8260_BD_NONALIGNED) |
---|
| 570 | sc->rxNonOctet++; |
---|
| 571 | if (status & M8260_BD_ABORT) |
---|
| 572 | sc->rxAbort++; |
---|
| 573 | if (status & M8260_BD_CRC_ERROR) |
---|
| 574 | sc->rxBadCRC++; |
---|
| 575 | if (status & M8260_BD_OVERRUN) |
---|
| 576 | sc->rxOverrun++; |
---|
| 577 | if (status & M8260_BD_CARRIER_LOST) |
---|
| 578 | sc->rxLostCarrier++; |
---|
| 579 | } |
---|
| 580 | |
---|
| 581 | /* |
---|
| 582 | * Reenable the buffer descriptor |
---|
| 583 | */ |
---|
| 584 | rxBd->status = (status & (M8260_BD_WRAP | M8260_BD_INTERRUPT)) | |
---|
| 585 | M8260_BD_EMPTY; |
---|
| 586 | |
---|
| 587 | /* |
---|
| 588 | * Move to next buffer descriptor |
---|
| 589 | */ |
---|
| 590 | if (++rxBdIndex == sc->rxBdCount) |
---|
| 591 | rxBdIndex = 0; |
---|
| 592 | } |
---|
| 593 | } |
---|
| 594 | |
---|
| 595 | |
---|
| 596 | static void |
---|
| 597 | scc_sendpacket (struct ifnet *ifp, struct mbuf *m) |
---|
| 598 | { |
---|
| 599 | struct m8260_hdlc_struct *sc = ifp->if_softc; |
---|
| 600 | volatile m8260BufferDescriptor_t *firstTxBd, *txBd; |
---|
| 601 | struct mbuf *l = NULL; |
---|
[2a832d8] | 602 | uint16_t status; |
---|
[5edbffe] | 603 | int nAdded; |
---|
| 604 | |
---|
| 605 | /* |
---|
| 606 | * Free up buffer descriptors |
---|
| 607 | */ |
---|
| 608 | m8260Enet_retire_tx_bd (sc); |
---|
| 609 | |
---|
| 610 | /* |
---|
| 611 | * Set up the transmit buffer descriptors. |
---|
| 612 | * No need to pad out short packets since the |
---|
| 613 | * hardware takes care of that automatically. |
---|
| 614 | * No need to copy the packet to a contiguous buffer |
---|
| 615 | * since the hardware is capable of scatter/gather DMA. |
---|
| 616 | */ |
---|
| 617 | nAdded = 0; |
---|
| 618 | txBd = firstTxBd = sc->txBdBase + sc->txBdHead; |
---|
| 619 | |
---|
| 620 | /* |
---|
| 621 | m8260.scc3.sccm |= (M8260_SCCE_TX | M8260_SCCE_TXE); |
---|
| 622 | */ |
---|
| 623 | |
---|
| 624 | for (;;) { |
---|
| 625 | /* |
---|
| 626 | * Wait for buffer descriptor to become available. |
---|
| 627 | */ |
---|
| 628 | if ((sc->txBdActiveCount + nAdded) == sc->txBdCount) { |
---|
| 629 | /* |
---|
| 630 | * Clear old events |
---|
| 631 | */ |
---|
| 632 | m8260.scc3.scce = M8260_SCCE_TX | M8260_SCCE_TXE; |
---|
| 633 | |
---|
| 634 | /* |
---|
| 635 | * Wait for buffer descriptor to become available. |
---|
| 636 | * Note that the buffer descriptors are checked |
---|
| 637 | * *before* * entering the wait loop -- this catches |
---|
| 638 | * the possibility that a buffer descriptor became |
---|
| 639 | * available between the `if' above, and the clearing |
---|
| 640 | * of the event register. |
---|
| 641 | * This is to catch the case where the transmitter |
---|
| 642 | * stops in the middle of a frame -- and only the |
---|
| 643 | * last buffer descriptor in a frame can generate |
---|
| 644 | * an interrupt. |
---|
| 645 | */ |
---|
| 646 | m8260Enet_retire_tx_bd (sc); |
---|
| 647 | while ((sc->txBdActiveCount + nAdded) == sc->txBdCount) { |
---|
| 648 | rtems_event_set events; |
---|
| 649 | |
---|
| 650 | /* |
---|
| 651 | * Unmask TX (buffer transmitted) event |
---|
| 652 | */ |
---|
| 653 | m8260.scc3.sccm |= (M8260_SCCE_TX | M8260_SCCE_TXE); |
---|
| 654 | |
---|
| 655 | rtems_bsdnet_event_receive (INTERRUPT_EVENT, |
---|
| 656 | RTEMS_WAIT|RTEMS_EVENT_ANY, |
---|
| 657 | RTEMS_NO_TIMEOUT, |
---|
| 658 | &events); |
---|
| 659 | m8260Enet_retire_tx_bd (sc); |
---|
| 660 | } |
---|
| 661 | } |
---|
| 662 | |
---|
| 663 | /* |
---|
| 664 | * Don't set the READY flag till the |
---|
| 665 | * whole packet has been readied. |
---|
| 666 | */ |
---|
| 667 | status = nAdded ? M8260_BD_READY : 0; |
---|
| 668 | |
---|
| 669 | /* |
---|
| 670 | * FIXME: Why not deal with empty mbufs at at higher level? |
---|
| 671 | * The IP fragmentation routine in ip_output |
---|
| 672 | * can produce packet fragments with zero length. |
---|
| 673 | * I think that ip_output should be changed to get |
---|
| 674 | * rid of these zero-length mbufs, but for now, |
---|
| 675 | * I'll deal with them here. |
---|
| 676 | */ |
---|
| 677 | if (m->m_len) { |
---|
| 678 | /* |
---|
| 679 | * Fill in the buffer descriptor |
---|
| 680 | */ |
---|
| 681 | |
---|
| 682 | txBd->buffer = mtod (m, void *); |
---|
| 683 | txBd->length = m->m_len; |
---|
| 684 | |
---|
| 685 | |
---|
| 686 | /* |
---|
| 687 | * Flush the buffer for this descriptor |
---|
| 688 | */ |
---|
| 689 | |
---|
[37a25cf] | 690 | rtems_cache_flush_multiple_data_lines((void *)txBd->buffer, txBd->length); |
---|
[5edbffe] | 691 | |
---|
| 692 | |
---|
| 693 | /* throw off the header for Ethernet Emulation mode */ |
---|
| 694 | /* |
---|
| 695 | txBd->buffer = mtod (m, void *); |
---|
| 696 | txBd->buffer += sizeof( struct ether_header ) + 2; |
---|
| 697 | txBd->length = m->m_len - sizeof( struct ether_header ) - 2; |
---|
| 698 | */ |
---|
| 699 | sc->txMbuf[sc->txBdHead] = m; |
---|
| 700 | nAdded++; |
---|
| 701 | if (++sc->txBdHead == sc->txBdCount) { |
---|
| 702 | status |= M8260_BD_WRAP; |
---|
| 703 | sc->txBdHead = 0; |
---|
| 704 | } |
---|
| 705 | l = m; |
---|
| 706 | m = m->m_next; |
---|
| 707 | } |
---|
| 708 | else { |
---|
| 709 | /* |
---|
| 710 | * Just toss empty mbufs |
---|
| 711 | */ |
---|
| 712 | struct mbuf *n; |
---|
| 713 | MFREE (m, n); |
---|
| 714 | m = n; |
---|
| 715 | if (l != NULL) |
---|
| 716 | l->m_next = m; |
---|
| 717 | } |
---|
| 718 | |
---|
| 719 | /* |
---|
| 720 | * Set the transmit buffer status. |
---|
| 721 | * Break out of the loop if this mbuf is the last in the frame. |
---|
| 722 | */ |
---|
| 723 | if (m == NULL) { |
---|
| 724 | if (nAdded) { |
---|
| 725 | status |= M8260_BD_LAST | M8260_BD_TX_CRC | M8260_BD_INTERRUPT; |
---|
| 726 | txBd->status = status; |
---|
| 727 | firstTxBd->status |= M8260_BD_READY; |
---|
| 728 | sc->txBdActiveCount += nAdded; |
---|
| 729 | } |
---|
| 730 | break; |
---|
| 731 | } |
---|
| 732 | txBd->status = status; |
---|
| 733 | txBd = sc->txBdBase + sc->txBdHead; |
---|
| 734 | } |
---|
| 735 | } |
---|
| 736 | |
---|
| 737 | |
---|
| 738 | /* |
---|
| 739 | * Driver transmit daemon |
---|
| 740 | */ |
---|
| 741 | void |
---|
| 742 | scc_txDaemon (void *arg) |
---|
| 743 | { |
---|
| 744 | struct m8260_hdlc_struct *sc = (struct m8260_hdlc_struct *)arg; |
---|
| 745 | struct ifnet *ifp = &sc->ac_if; |
---|
| 746 | struct mbuf *m; |
---|
| 747 | rtems_event_set events; |
---|
| 748 | |
---|
| 749 | for (;;) { |
---|
| 750 | /* |
---|
| 751 | * Wait for packet |
---|
| 752 | */ |
---|
| 753 | rtems_bsdnet_event_receive (START_TRANSMIT_EVENT, RTEMS_EVENT_ANY | RTEMS_WAIT, RTEMS_NO_TIMEOUT, &events); |
---|
| 754 | |
---|
| 755 | /* |
---|
| 756 | * Send packets till queue is empty |
---|
| 757 | */ |
---|
| 758 | for (;;) { |
---|
| 759 | /* |
---|
| 760 | * Get the next mbuf chain to transmit. |
---|
| 761 | */ |
---|
| 762 | IF_DEQUEUE(&ifp->if_snd, m); |
---|
| 763 | if (!m) |
---|
| 764 | break; |
---|
| 765 | |
---|
| 766 | |
---|
| 767 | scc_sendpacket (ifp, m); |
---|
| 768 | |
---|
| 769 | |
---|
| 770 | } |
---|
| 771 | ifp->if_flags &= ~IFF_OACTIVE; |
---|
| 772 | } |
---|
| 773 | } |
---|
| 774 | |
---|
| 775 | |
---|
| 776 | /* |
---|
| 777 | * Send packet (caller provides header). |
---|
| 778 | */ |
---|
| 779 | static void |
---|
| 780 | m8260_hdlc_start (struct ifnet *ifp) |
---|
| 781 | { |
---|
| 782 | struct m8260_hdlc_struct *sc = ifp->if_softc; |
---|
| 783 | |
---|
| 784 | rtems_event_send (sc->txDaemonTid, START_TRANSMIT_EVENT); |
---|
| 785 | ifp->if_flags |= IFF_OACTIVE; |
---|
| 786 | } |
---|
| 787 | |
---|
| 788 | /* |
---|
| 789 | * Initialize and start the device |
---|
| 790 | */ |
---|
| 791 | static void |
---|
| 792 | scc_init (void *arg) |
---|
| 793 | { |
---|
| 794 | struct m8260_hdlc_struct *sc = arg; |
---|
| 795 | struct ifnet *ifp = &sc->ac_if; |
---|
| 796 | |
---|
| 797 | if (sc->txDaemonTid == 0) { |
---|
| 798 | |
---|
| 799 | /* |
---|
| 800 | * Set up SCC hardware |
---|
| 801 | */ |
---|
| 802 | m8260_scc_initialize_hardware (sc); |
---|
| 803 | |
---|
| 804 | /* |
---|
| 805 | * Start driver tasks |
---|
| 806 | */ |
---|
| 807 | sc->txDaemonTid = rtems_bsdnet_newproc ("SCtx", 4096, scc_txDaemon, sc); |
---|
| 808 | sc->rxDaemonTid = rtems_bsdnet_newproc ("SCrx", 4096, scc_rxDaemon, sc); |
---|
| 809 | |
---|
| 810 | } |
---|
| 811 | |
---|
| 812 | #if 0 |
---|
| 813 | /* |
---|
| 814 | * Set flags appropriately |
---|
| 815 | */ |
---|
| 816 | if (ifp->if_flags & IFF_PROMISC) |
---|
| 817 | m8260.scc3.psmr |= 0x200; |
---|
| 818 | else |
---|
| 819 | m8260.scc3.psmr &= ~0x200; |
---|
| 820 | #endif |
---|
| 821 | |
---|
| 822 | /* |
---|
| 823 | * Tell the world that we're running. |
---|
| 824 | */ |
---|
| 825 | ifp->if_flags |= IFF_RUNNING; |
---|
| 826 | |
---|
| 827 | /* |
---|
| 828 | * Enable receiver and transmitter |
---|
| 829 | */ |
---|
| 830 | m8260.scc3.gsmr_l |= 0x30; |
---|
| 831 | } |
---|
| 832 | |
---|
| 833 | |
---|
| 834 | |
---|
| 835 | /* |
---|
| 836 | * Stop the device |
---|
| 837 | */ |
---|
| 838 | static void |
---|
| 839 | scc_stop (struct m8260_hdlc_struct *sc) |
---|
| 840 | { |
---|
| 841 | struct ifnet *ifp = &sc->ac_if; |
---|
| 842 | |
---|
| 843 | ifp->if_flags &= ~IFF_RUNNING; |
---|
| 844 | |
---|
| 845 | /* |
---|
| 846 | * Shut down receiver and transmitter |
---|
| 847 | */ |
---|
| 848 | m8260.scc3.gsmr_l &= ~0x30; |
---|
| 849 | } |
---|
| 850 | |
---|
| 851 | |
---|
| 852 | /* |
---|
| 853 | * Show interface statistics |
---|
| 854 | */ |
---|
| 855 | static void |
---|
| 856 | hdlc_stats (struct m8260_hdlc_struct *sc) |
---|
| 857 | { |
---|
| 858 | printf (" Rx Interrupts:%-8lu", sc->rxInterrupts); |
---|
| 859 | printf (" Giant:%-8lu", sc->rxGiant); |
---|
| 860 | printf (" Non-octet:%-8lu\n", sc->rxNonOctet); |
---|
| 861 | printf (" Bad CRC:%-8lu", sc->rxBadCRC); |
---|
| 862 | printf (" Overrun:%-8lu", sc->rxOverrun); |
---|
| 863 | printf (" No Carrier:%-8lu\n", sc->rxLostCarrier); |
---|
| 864 | printf (" Discarded:%-8lu\n", (unsigned long)m8260.scc3p.un.hdlc.disfc); |
---|
| 865 | |
---|
| 866 | printf (" Tx Interrupts:%-8lu", sc->txInterrupts); |
---|
| 867 | printf (" No Carrier:%-8lu", sc->txLostCarrier); |
---|
| 868 | printf (" Underrun:%-8lu\n", sc->txUnderrun); |
---|
| 869 | printf (" Raw output wait:%-8lu\n", sc->txRawWait); |
---|
| 870 | } |
---|
| 871 | |
---|
| 872 | /* |
---|
| 873 | * Driver ioctl handler |
---|
| 874 | */ |
---|
| 875 | static int |
---|
| 876 | scc_ioctl (struct ifnet *ifp, int command, caddr_t data) |
---|
| 877 | { |
---|
| 878 | struct m8260_hdlc_struct *sc = ifp->if_softc; |
---|
| 879 | int error = 0; |
---|
| 880 | |
---|
| 881 | switch (command) { |
---|
| 882 | case SIOCGIFADDR: |
---|
| 883 | case SIOCSIFADDR: |
---|
| 884 | hdlc_ioctl (ifp, command, data); |
---|
| 885 | break; |
---|
| 886 | |
---|
| 887 | case SIOCSIFFLAGS: |
---|
| 888 | switch (ifp->if_flags & (IFF_UP | IFF_RUNNING)) { |
---|
| 889 | case IFF_RUNNING: |
---|
| 890 | scc_stop (sc); |
---|
| 891 | break; |
---|
| 892 | |
---|
| 893 | case IFF_UP: |
---|
| 894 | scc_init (sc); |
---|
| 895 | break; |
---|
| 896 | |
---|
| 897 | case IFF_UP | IFF_RUNNING: |
---|
| 898 | scc_stop (sc); |
---|
| 899 | scc_init (sc); |
---|
| 900 | break; |
---|
| 901 | |
---|
| 902 | default: |
---|
| 903 | break; |
---|
| 904 | } |
---|
| 905 | break; |
---|
| 906 | |
---|
| 907 | case SIO_RTEMS_SHOW_STATS: |
---|
| 908 | hdlc_stats (sc); |
---|
| 909 | break; |
---|
| 910 | |
---|
| 911 | /* |
---|
| 912 | * FIXME: All sorts of multicast commands need to be added here! |
---|
| 913 | */ |
---|
| 914 | default: |
---|
| 915 | error = EINVAL; |
---|
| 916 | break; |
---|
| 917 | } |
---|
| 918 | return error; |
---|
| 919 | } |
---|
| 920 | |
---|
| 921 | |
---|
| 922 | |
---|
| 923 | /* |
---|
| 924 | * Attach an SCC driver to the system |
---|
| 925 | */ |
---|
| 926 | int |
---|
| 927 | rtems_scc3_driver_attach (struct rtems_bsdnet_ifconfig *config) |
---|
| 928 | { |
---|
| 929 | struct m8260_hdlc_struct *sc; |
---|
| 930 | struct ifnet *ifp; |
---|
| 931 | int mtu; |
---|
| 932 | int i; |
---|
| 933 | |
---|
| 934 | /* |
---|
| 935 | * Find a free driver |
---|
| 936 | */ |
---|
| 937 | for (i = 0 ; i < NIFACES ; i++) { |
---|
| 938 | sc = &hdlc_driver[i]; |
---|
| 939 | ifp = &sc->ac_if; |
---|
| 940 | if (ifp->if_softc == NULL) |
---|
| 941 | break; |
---|
| 942 | } |
---|
| 943 | if (i >= NIFACES) { |
---|
| 944 | printf ("Too many SCC drivers.\n"); |
---|
| 945 | return 0; |
---|
| 946 | } |
---|
| 947 | |
---|
| 948 | #if 0 |
---|
| 949 | /* |
---|
| 950 | * Process options |
---|
| 951 | */ |
---|
| 952 | |
---|
| 953 | if (config->hardware_address) { |
---|
| 954 | memcpy (sc->arpcom.ac_enaddr, config->hardware_address, ETHER_ADDR_LEN); |
---|
| 955 | } |
---|
| 956 | else { |
---|
| 957 | sc->arpcom.ac_enaddr[0] = 0x44; |
---|
| 958 | sc->arpcom.ac_enaddr[1] = 0x22; |
---|
| 959 | sc->arpcom.ac_enaddr[2] = 0x33; |
---|
| 960 | sc->arpcom.ac_enaddr[3] = 0x33; |
---|
| 961 | sc->arpcom.ac_enaddr[4] = 0x22; |
---|
| 962 | sc->arpcom.ac_enaddr[5] = 0x44; |
---|
| 963 | } |
---|
| 964 | #endif |
---|
| 965 | |
---|
| 966 | if (config->mtu) |
---|
| 967 | mtu = config->mtu; |
---|
| 968 | else |
---|
| 969 | mtu = ETHERMTU; |
---|
| 970 | if (config->rbuf_count) |
---|
| 971 | sc->rxBdCount = config->rbuf_count; |
---|
| 972 | else |
---|
| 973 | sc->rxBdCount = RX_BUF_COUNT; |
---|
| 974 | if (config->xbuf_count) |
---|
| 975 | sc->txBdCount = config->xbuf_count; |
---|
| 976 | else |
---|
| 977 | sc->txBdCount = TX_BUF_COUNT * TX_BD_PER_BUF; |
---|
| 978 | sc->acceptBroadcast = !config->ignore_broadcast; |
---|
| 979 | |
---|
| 980 | /* |
---|
| 981 | * Set up network interface values |
---|
| 982 | */ |
---|
| 983 | ifp->if_softc = sc; |
---|
| 984 | ifp->if_unit = i + 1; |
---|
| 985 | ifp->if_name = "eth"; |
---|
| 986 | ifp->if_mtu = mtu; |
---|
| 987 | ifp->if_init = scc_init; |
---|
| 988 | ifp->if_ioctl = scc_ioctl; |
---|
| 989 | ifp->if_start = m8260_hdlc_start; |
---|
| 990 | ifp->if_output = hdlc_output; |
---|
| 991 | ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | /*IFF_PROMISC |*/ IFF_NOARP; |
---|
| 992 | if (ifp->if_snd.ifq_maxlen == 0) |
---|
| 993 | ifp->if_snd.ifq_maxlen = ifqmaxlen; |
---|
| 994 | |
---|
| 995 | /* |
---|
| 996 | * Attach the interface |
---|
| 997 | */ |
---|
| 998 | if_attach (ifp); |
---|
| 999 | hdlc_ifattach (ifp); |
---|
| 1000 | return 1; |
---|
| 1001 | }; |
---|
| 1002 | |
---|
| 1003 | |
---|
| 1004 | int |
---|
| 1005 | rtems_enet_driver_attach(struct rtems_bsdnet_ifconfig *config, int attaching) |
---|
| 1006 | { |
---|
| 1007 | return rtems_scc3_driver_attach( config ); |
---|
| 1008 | |
---|
| 1009 | /* |
---|
| 1010 | if ((m8260.fec.mii_data & 0xffff) == 0x2000) { |
---|
| 1011 | return rtems_fec_driver_attach(config); |
---|
| 1012 | } |
---|
| 1013 | else { |
---|
| 1014 | return rtems_scc1_driver_attach(config); |
---|
| 1015 | } |
---|
| 1016 | */ |
---|
| 1017 | } |
---|