Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Krzysztof Hałasa | 3022439 | 2008-03-24 20:24:23 +0100 | [diff] [blame] | 2 | * Hitachi (now Renesas) SCA-II HD64572 driver for Linux |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | * |
Krzysztof Hałasa | abc9d91 | 2008-07-09 16:49:37 +0200 | [diff] [blame] | 4 | * Copyright (C) 1998-2008 Krzysztof Halasa <khc@pm.waw.pl> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify it |
| 7 | * under the terms of version 2 of the GNU General Public License |
| 8 | * as published by the Free Software Foundation. |
| 9 | * |
Krzysztof Hałasa | 3022439 | 2008-03-24 20:24:23 +0100 | [diff] [blame] | 10 | * Source of information: HD64572 SCA-II User's Manual |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 11 | * |
| 12 | * We use the following SCA memory map: |
| 13 | * |
Krzysztof Hałasa | 61e0a6a | 2008-07-09 23:13:49 +0200 | [diff] [blame] | 14 | * Packet buffer descriptor rings - starting from card->rambase: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 15 | * rx_ring_buffers * sizeof(pkt_desc) = logical channel #0 RX ring |
| 16 | * tx_ring_buffers * sizeof(pkt_desc) = logical channel #0 TX ring |
| 17 | * rx_ring_buffers * sizeof(pkt_desc) = logical channel #1 RX ring (if used) |
| 18 | * tx_ring_buffers * sizeof(pkt_desc) = logical channel #1 TX ring (if used) |
| 19 | * |
Krzysztof Hałasa | 61e0a6a | 2008-07-09 23:13:49 +0200 | [diff] [blame] | 20 | * Packet data buffers - starting from card->rambase + buff_offset: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | * rx_ring_buffers * HDLC_MAX_MRU = logical channel #0 RX buffers |
| 22 | * tx_ring_buffers * HDLC_MAX_MRU = logical channel #0 TX buffers |
| 23 | * rx_ring_buffers * HDLC_MAX_MRU = logical channel #0 RX buffers (if used) |
| 24 | * tx_ring_buffers * HDLC_MAX_MRU = logical channel #0 TX buffers (if used) |
| 25 | */ |
| 26 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | #include <linux/bitops.h> |
Krzysztof Hałasa | 3022439 | 2008-03-24 20:24:23 +0100 | [diff] [blame] | 28 | #include <linux/errno.h> |
| 29 | #include <linux/fcntl.h> |
| 30 | #include <linux/hdlc.h> |
| 31 | #include <linux/in.h> |
| 32 | #include <linux/init.h> |
| 33 | #include <linux/interrupt.h> |
| 34 | #include <linux/ioport.h> |
| 35 | #include <linux/jiffies.h> |
| 36 | #include <linux/kernel.h> |
| 37 | #include <linux/module.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | #include <linux/netdevice.h> |
| 39 | #include <linux/skbuff.h> |
Krzysztof Hałasa | 3022439 | 2008-03-24 20:24:23 +0100 | [diff] [blame] | 40 | #include <linux/slab.h> |
| 41 | #include <linux/string.h> |
| 42 | #include <linux/types.h> |
| 43 | #include <asm/io.h> |
| 44 | #include <asm/system.h> |
| 45 | #include <asm/uaccess.h> |
| 46 | #include "hd64572.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | |
Krzysztof Hałasa | abc9d91 | 2008-07-09 16:49:37 +0200 | [diff] [blame] | 48 | #define NAPI_WEIGHT 16 |
| 49 | |
Krzysztof Hałasa | 61e0a6a | 2008-07-09 23:13:49 +0200 | [diff] [blame] | 50 | #define get_msci(port) (port->chan ? MSCI1_OFFSET : MSCI0_OFFSET) |
| 51 | #define get_dmac_rx(port) (port->chan ? DMAC1RX_OFFSET : DMAC0RX_OFFSET) |
| 52 | #define get_dmac_tx(port) (port->chan ? DMAC1TX_OFFSET : DMAC0TX_OFFSET) |
| 53 | |
| 54 | #define sca_in(reg, card) readb(card->scabase + (reg)) |
| 55 | #define sca_out(value, reg, card) writeb(value, card->scabase + (reg)) |
| 56 | #define sca_inw(reg, card) readw(card->scabase + (reg)) |
| 57 | #define sca_outw(value, reg, card) writew(value, card->scabase + (reg)) |
| 58 | #define sca_inl(reg, card) readl(card->scabase + (reg)) |
| 59 | #define sca_outl(value, reg, card) writel(value, card->scabase + (reg)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | |
Krzysztof Hałasa | abc9d91 | 2008-07-09 16:49:37 +0200 | [diff] [blame] | 61 | static int sca_poll(struct napi_struct *napi, int budget); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | static inline port_t* dev_to_port(struct net_device *dev) |
| 64 | { |
| 65 | return dev_to_hdlc(dev)->priv; |
| 66 | } |
| 67 | |
Krzysztof Hałasa | abc9d91 | 2008-07-09 16:49:37 +0200 | [diff] [blame] | 68 | static inline void enable_intr(port_t *port) |
| 69 | { |
Krzysztof Hałasa | 0446c3b | 2008-07-09 19:28:45 +0200 | [diff] [blame] | 70 | /* enable DMIB and MSCI RXINTA interrupts */ |
Krzysztof Hałasa | abc9d91 | 2008-07-09 16:49:37 +0200 | [diff] [blame] | 71 | sca_outl(sca_inl(IER0, port->card) | |
Krzysztof Hałasa | 61e0a6a | 2008-07-09 23:13:49 +0200 | [diff] [blame] | 72 | (port->chan ? 0x08002200 : 0x00080022), IER0, port->card); |
Krzysztof Hałasa | abc9d91 | 2008-07-09 16:49:37 +0200 | [diff] [blame] | 73 | } |
| 74 | |
| 75 | static inline void disable_intr(port_t *port) |
| 76 | { |
| 77 | sca_outl(sca_inl(IER0, port->card) & |
Krzysztof Hałasa | 61e0a6a | 2008-07-09 23:13:49 +0200 | [diff] [blame] | 78 | (port->chan ? 0x00FF00FF : 0xFF00FF00), IER0, port->card); |
Krzysztof Hałasa | abc9d91 | 2008-07-09 16:49:37 +0200 | [diff] [blame] | 79 | } |
| 80 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | static inline u16 desc_abs_number(port_t *port, u16 desc, int transmit) |
| 82 | { |
Krzysztof Hałasa | 61e0a6a | 2008-07-09 23:13:49 +0200 | [diff] [blame] | 83 | u16 rx_buffs = port->card->rx_ring_buffers; |
| 84 | u16 tx_buffs = port->card->tx_ring_buffers; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | |
| 86 | desc %= (transmit ? tx_buffs : rx_buffs); // called with "X + 1" etc. |
Krzysztof Hałasa | 61e0a6a | 2008-07-09 23:13:49 +0200 | [diff] [blame] | 87 | return port->chan * (rx_buffs + tx_buffs) + transmit * rx_buffs + desc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | } |
| 89 | |
| 90 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | static inline u16 desc_offset(port_t *port, u16 desc, int transmit) |
| 92 | { |
Krzysztof Hałasa | fcfe9ff | 2008-07-10 00:30:51 +0200 | [diff] [blame] | 93 | /* Descriptor offset always fits in 16 bits */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 94 | return desc_abs_number(port, desc, transmit) * sizeof(pkt_desc); |
| 95 | } |
| 96 | |
| 97 | |
Krzysztof Hałasa | 3022439 | 2008-03-24 20:24:23 +0100 | [diff] [blame] | 98 | static inline pkt_desc __iomem *desc_address(port_t *port, u16 desc, |
| 99 | int transmit) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | { |
Krzysztof Hałasa | 61e0a6a | 2008-07-09 23:13:49 +0200 | [diff] [blame] | 101 | return (pkt_desc __iomem *)(port->card->rambase + |
| 102 | desc_offset(port, desc, transmit)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | } |
| 104 | |
| 105 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | static inline u32 buffer_offset(port_t *port, u16 desc, int transmit) |
| 107 | { |
Krzysztof Hałasa | 61e0a6a | 2008-07-09 23:13:49 +0200 | [diff] [blame] | 108 | return port->card->buff_offset + |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | desc_abs_number(port, desc, transmit) * (u32)HDLC_MAX_MRU; |
| 110 | } |
| 111 | |
| 112 | |
Krzysztof Halasa | c2ce920 | 2006-07-12 13:46:12 -0700 | [diff] [blame] | 113 | static inline void sca_set_carrier(port_t *port) |
| 114 | { |
Krzysztof Hałasa | 61e0a6a | 2008-07-09 23:13:49 +0200 | [diff] [blame] | 115 | if (!(sca_in(get_msci(port) + ST3, port->card) & ST3_DCD)) { |
Krzysztof Halasa | c2ce920 | 2006-07-12 13:46:12 -0700 | [diff] [blame] | 116 | #ifdef DEBUG_LINK |
| 117 | printk(KERN_DEBUG "%s: sca_set_carrier on\n", |
Krzysztof Hałasa | 61e0a6a | 2008-07-09 23:13:49 +0200 | [diff] [blame] | 118 | port->netdev.name); |
Krzysztof Halasa | c2ce920 | 2006-07-12 13:46:12 -0700 | [diff] [blame] | 119 | #endif |
Krzysztof Hałasa | 61e0a6a | 2008-07-09 23:13:49 +0200 | [diff] [blame] | 120 | netif_carrier_on(port->netdev); |
Krzysztof Halasa | c2ce920 | 2006-07-12 13:46:12 -0700 | [diff] [blame] | 121 | } else { |
| 122 | #ifdef DEBUG_LINK |
| 123 | printk(KERN_DEBUG "%s: sca_set_carrier off\n", |
Krzysztof Hałasa | 61e0a6a | 2008-07-09 23:13:49 +0200 | [diff] [blame] | 124 | port->netdev.name); |
Krzysztof Halasa | c2ce920 | 2006-07-12 13:46:12 -0700 | [diff] [blame] | 125 | #endif |
Krzysztof Hałasa | 61e0a6a | 2008-07-09 23:13:49 +0200 | [diff] [blame] | 126 | netif_carrier_off(port->netdev); |
Krzysztof Halasa | c2ce920 | 2006-07-12 13:46:12 -0700 | [diff] [blame] | 127 | } |
| 128 | } |
| 129 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | |
Krzysztof Hałasa | 3022439 | 2008-03-24 20:24:23 +0100 | [diff] [blame] | 131 | static void sca_init_port(port_t *port) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | { |
Krzysztof Hałasa | 61e0a6a | 2008-07-09 23:13:49 +0200 | [diff] [blame] | 133 | card_t *card = port->card; |
Krzysztof Hałasa | e1f024e | 2008-07-11 00:13:09 +0200 | [diff] [blame] | 134 | u16 dmac_rx = get_dmac_rx(port), dmac_tx = get_dmac_tx(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 135 | int transmit, i; |
| 136 | |
| 137 | port->rxin = 0; |
| 138 | port->txin = 0; |
| 139 | port->txlast = 0; |
| 140 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | for (transmit = 0; transmit < 2; transmit++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | u16 buffs = transmit ? card->tx_ring_buffers |
| 143 | : card->rx_ring_buffers; |
| 144 | |
| 145 | for (i = 0; i < buffs; i++) { |
| 146 | pkt_desc __iomem *desc = desc_address(port, i, transmit); |
| 147 | u16 chain_off = desc_offset(port, i + 1, transmit); |
| 148 | u32 buff_off = buffer_offset(port, i, transmit); |
| 149 | |
Krzysztof Hałasa | 3022439 | 2008-03-24 20:24:23 +0100 | [diff] [blame] | 150 | writel(chain_off, &desc->cp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 151 | writel(buff_off, &desc->bp); |
| 152 | writew(0, &desc->len); |
| 153 | writeb(0, &desc->stat); |
| 154 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 155 | } |
Krzysztof Hałasa | e1f024e | 2008-07-11 00:13:09 +0200 | [diff] [blame] | 156 | |
| 157 | /* DMA disable - to halt state */ |
| 158 | sca_out(0, DSR_RX(port->chan), card); |
| 159 | sca_out(0, DSR_TX(port->chan), card); |
| 160 | |
| 161 | /* software ABORT - to initial state */ |
| 162 | sca_out(DCR_ABORT, DCR_RX(port->chan), card); |
| 163 | sca_out(DCR_ABORT, DCR_TX(port->chan), card); |
| 164 | |
| 165 | /* current desc addr */ |
| 166 | sca_outl(desc_offset(port, 0, 0), dmac_rx + CDAL, card); |
| 167 | sca_outl(desc_offset(port, card->tx_ring_buffers - 1, 0), |
| 168 | dmac_rx + EDAL, card); |
| 169 | sca_outl(desc_offset(port, 0, 1), dmac_tx + CDAL, card); |
| 170 | sca_outl(desc_offset(port, 0, 1), dmac_tx + EDAL, card); |
| 171 | |
| 172 | /* clear frame end interrupt counter */ |
| 173 | sca_out(DCR_CLEAR_EOF, DCR_RX(port->chan), card); |
| 174 | sca_out(DCR_CLEAR_EOF, DCR_TX(port->chan), card); |
| 175 | |
| 176 | /* Receive */ |
| 177 | sca_outw(HDLC_MAX_MRU, dmac_rx + BFLL, card); /* set buffer length */ |
| 178 | sca_out(0x14, DMR_RX(port->chan), card); /* Chain mode, Multi-frame */ |
| 179 | sca_out(DIR_EOME, DIR_RX(port->chan), card); /* enable interrupts */ |
| 180 | sca_out(DSR_DE, DSR_RX(port->chan), card); /* DMA enable */ |
| 181 | |
| 182 | /* Transmit */ |
| 183 | sca_out(0x14, DMR_TX(port->chan), card); /* Chain mode, Multi-frame */ |
| 184 | sca_out(DIR_EOME, DIR_TX(port->chan), card); /* enable interrupts */ |
| 185 | |
Krzysztof Halasa | c2ce920 | 2006-07-12 13:46:12 -0700 | [diff] [blame] | 186 | sca_set_carrier(port); |
Krzysztof Hałasa | 61e0a6a | 2008-07-09 23:13:49 +0200 | [diff] [blame] | 187 | netif_napi_add(port->netdev, &port->napi, sca_poll, NAPI_WEIGHT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 188 | } |
| 189 | |
| 190 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 191 | /* MSCI interrupt service */ |
| 192 | static inline void sca_msci_intr(port_t *port) |
| 193 | { |
| 194 | u16 msci = get_msci(port); |
Krzysztof Hałasa | 61e0a6a | 2008-07-09 23:13:49 +0200 | [diff] [blame] | 195 | card_t* card = port->card; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | |
Krzysztof Hałasa | b0942f7 | 2008-07-09 20:01:23 +0200 | [diff] [blame] | 197 | if (sca_in(msci + ST1, card) & ST1_CDCD) { |
| 198 | /* Reset MSCI CDCD status bit */ |
| 199 | sca_out(ST1_CDCD, msci + ST1, card); |
Krzysztof Halasa | c2ce920 | 2006-07-12 13:46:12 -0700 | [diff] [blame] | 200 | sca_set_carrier(port); |
Krzysztof Hałasa | b0942f7 | 2008-07-09 20:01:23 +0200 | [diff] [blame] | 201 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 202 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 203 | |
| 204 | |
Krzysztof Hałasa | 3022439 | 2008-03-24 20:24:23 +0100 | [diff] [blame] | 205 | static inline void sca_rx(card_t *card, port_t *port, pkt_desc __iomem *desc, |
| 206 | u16 rxin) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 207 | { |
Krzysztof Hałasa | 61e0a6a | 2008-07-09 23:13:49 +0200 | [diff] [blame] | 208 | struct net_device *dev = port->netdev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 209 | struct sk_buff *skb; |
| 210 | u16 len; |
| 211 | u32 buff; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 212 | |
| 213 | len = readw(&desc->len); |
| 214 | skb = dev_alloc_skb(len); |
| 215 | if (!skb) { |
Krzysztof Halasa | 198191c | 2008-06-30 23:26:53 +0200 | [diff] [blame] | 216 | dev->stats.rx_dropped++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 217 | return; |
| 218 | } |
| 219 | |
| 220 | buff = buffer_offset(port, rxin, 0); |
Krzysztof Hałasa | 61e0a6a | 2008-07-09 23:13:49 +0200 | [diff] [blame] | 221 | memcpy_fromio(skb->data, card->rambase + buff, len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 223 | skb_put(skb, len); |
| 224 | #ifdef DEBUG_PKT |
| 225 | printk(KERN_DEBUG "%s RX(%i):", dev->name, skb->len); |
| 226 | debug_frame(skb); |
| 227 | #endif |
Krzysztof Halasa | 198191c | 2008-06-30 23:26:53 +0200 | [diff] [blame] | 228 | dev->stats.rx_packets++; |
| 229 | dev->stats.rx_bytes += skb->len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 230 | skb->protocol = hdlc_type_trans(skb, dev); |
Krzysztof Hałasa | abc9d91 | 2008-07-09 16:49:37 +0200 | [diff] [blame] | 231 | netif_receive_skb(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 232 | } |
| 233 | |
| 234 | |
Krzysztof Hałasa | abc9d91 | 2008-07-09 16:49:37 +0200 | [diff] [blame] | 235 | /* Receive DMA service */ |
| 236 | static inline int sca_rx_done(port_t *port, int budget) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 237 | { |
Krzysztof Hałasa | 61e0a6a | 2008-07-09 23:13:49 +0200 | [diff] [blame] | 238 | struct net_device *dev = port->netdev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 239 | u16 dmac = get_dmac_rx(port); |
Krzysztof Hałasa | 61e0a6a | 2008-07-09 23:13:49 +0200 | [diff] [blame] | 240 | card_t *card = port->card; |
| 241 | u8 stat = sca_in(DSR_RX(port->chan), card); /* read DMA Status */ |
Krzysztof Hałasa | abc9d91 | 2008-07-09 16:49:37 +0200 | [diff] [blame] | 242 | int received = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | |
| 244 | /* Reset DSR status bits */ |
| 245 | sca_out((stat & (DSR_EOT | DSR_EOM | DSR_BOF | DSR_COF)) | DSR_DWE, |
Krzysztof Hałasa | 61e0a6a | 2008-07-09 23:13:49 +0200 | [diff] [blame] | 246 | DSR_RX(port->chan), card); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 247 | |
| 248 | if (stat & DSR_BOF) |
Krzysztof Halasa | 198191c | 2008-06-30 23:26:53 +0200 | [diff] [blame] | 249 | /* Dropped one or more frames */ |
| 250 | dev->stats.rx_over_errors++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 251 | |
Krzysztof Hałasa | abc9d91 | 2008-07-09 16:49:37 +0200 | [diff] [blame] | 252 | while (received < budget) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | u32 desc_off = desc_offset(port, port->rxin, 0); |
| 254 | pkt_desc __iomem *desc; |
Krzysztof Hałasa | 3022439 | 2008-03-24 20:24:23 +0100 | [diff] [blame] | 255 | u32 cda = sca_inl(dmac + CDAL, card); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 256 | |
| 257 | if ((cda >= desc_off) && (cda < desc_off + sizeof(pkt_desc))) |
| 258 | break; /* No frame received */ |
| 259 | |
| 260 | desc = desc_address(port, port->rxin, 0); |
| 261 | stat = readb(&desc->stat); |
| 262 | if (!(stat & ST_RX_EOM)) |
| 263 | port->rxpart = 1; /* partial frame received */ |
| 264 | else if ((stat & ST_ERROR_MASK) || port->rxpart) { |
Krzysztof Halasa | 198191c | 2008-06-30 23:26:53 +0200 | [diff] [blame] | 265 | dev->stats.rx_errors++; |
| 266 | if (stat & ST_RX_OVERRUN) |
| 267 | dev->stats.rx_fifo_errors++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 268 | else if ((stat & (ST_RX_SHORT | ST_RX_ABORT | |
| 269 | ST_RX_RESBIT)) || port->rxpart) |
Krzysztof Halasa | 198191c | 2008-06-30 23:26:53 +0200 | [diff] [blame] | 270 | dev->stats.rx_frame_errors++; |
| 271 | else if (stat & ST_RX_CRC) |
| 272 | dev->stats.rx_crc_errors++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 273 | if (stat & ST_RX_EOM) |
| 274 | port->rxpart = 0; /* received last fragment */ |
Krzysztof Hałasa | abc9d91 | 2008-07-09 16:49:37 +0200 | [diff] [blame] | 275 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 276 | sca_rx(card, port, desc, port->rxin); |
Krzysztof Hałasa | abc9d91 | 2008-07-09 16:49:37 +0200 | [diff] [blame] | 277 | received++; |
| 278 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 279 | |
| 280 | /* Set new error descriptor address */ |
Krzysztof Hałasa | 3022439 | 2008-03-24 20:24:23 +0100 | [diff] [blame] | 281 | sca_outl(desc_off, dmac + EDAL, card); |
Krzysztof Hałasa | 0b59cef | 2008-07-09 23:39:12 +0200 | [diff] [blame] | 282 | port->rxin = (port->rxin + 1) % card->rx_ring_buffers; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 283 | } |
| 284 | |
| 285 | /* make sure RX DMA is enabled */ |
Krzysztof Hałasa | 61e0a6a | 2008-07-09 23:13:49 +0200 | [diff] [blame] | 286 | sca_out(DSR_DE, DSR_RX(port->chan), card); |
Krzysztof Hałasa | abc9d91 | 2008-07-09 16:49:37 +0200 | [diff] [blame] | 287 | return received; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 288 | } |
| 289 | |
| 290 | |
Krzysztof Hałasa | abc9d91 | 2008-07-09 16:49:37 +0200 | [diff] [blame] | 291 | /* Transmit DMA service */ |
| 292 | static inline void sca_tx_done(port_t *port) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 293 | { |
Krzysztof Hałasa | 61e0a6a | 2008-07-09 23:13:49 +0200 | [diff] [blame] | 294 | struct net_device *dev = port->netdev; |
| 295 | card_t* card = port->card; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 296 | u8 stat; |
| 297 | |
| 298 | spin_lock(&port->lock); |
| 299 | |
Krzysztof Hałasa | 61e0a6a | 2008-07-09 23:13:49 +0200 | [diff] [blame] | 300 | stat = sca_in(DSR_TX(port->chan), card); /* read DMA Status */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 301 | |
| 302 | /* Reset DSR status bits */ |
| 303 | sca_out((stat & (DSR_EOT | DSR_EOM | DSR_BOF | DSR_COF)) | DSR_DWE, |
Krzysztof Hałasa | 61e0a6a | 2008-07-09 23:13:49 +0200 | [diff] [blame] | 304 | DSR_TX(port->chan), card); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | |
| 306 | while (1) { |
Krzysztof Hałasa | 09fd65a | 2008-07-09 19:47:05 +0200 | [diff] [blame] | 307 | pkt_desc __iomem *desc = desc_address(port, port->txlast, 1); |
Krzysztof Hałasa | b0942f7 | 2008-07-09 20:01:23 +0200 | [diff] [blame] | 308 | u8 stat = readb(&desc->stat); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 309 | |
Krzysztof Hałasa | b0942f7 | 2008-07-09 20:01:23 +0200 | [diff] [blame] | 310 | if (!(stat & ST_TX_OWNRSHP)) |
Krzysztof Hałasa | 09fd65a | 2008-07-09 19:47:05 +0200 | [diff] [blame] | 311 | break; /* not yet transmitted */ |
Krzysztof Hałasa | b0942f7 | 2008-07-09 20:01:23 +0200 | [diff] [blame] | 312 | if (stat & ST_TX_UNDRRUN) { |
| 313 | dev->stats.tx_errors++; |
| 314 | dev->stats.tx_fifo_errors++; |
| 315 | } else { |
| 316 | dev->stats.tx_packets++; |
| 317 | dev->stats.tx_bytes += readw(&desc->len); |
| 318 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 319 | writeb(0, &desc->stat); /* Free descriptor */ |
Krzysztof Hałasa | 0b59cef | 2008-07-09 23:39:12 +0200 | [diff] [blame] | 320 | port->txlast = (port->txlast + 1) % card->tx_ring_buffers; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 321 | } |
| 322 | |
| 323 | netif_wake_queue(dev); |
| 324 | spin_unlock(&port->lock); |
| 325 | } |
| 326 | |
| 327 | |
Krzysztof Hałasa | abc9d91 | 2008-07-09 16:49:37 +0200 | [diff] [blame] | 328 | static int sca_poll(struct napi_struct *napi, int budget) |
| 329 | { |
| 330 | port_t *port = container_of(napi, port_t, napi); |
Krzysztof Hałasa | 0954ed8 | 2008-07-09 21:24:42 +0200 | [diff] [blame] | 331 | u32 isr0 = sca_inl(ISR0, port->card); |
Krzysztof Hałasa | abc9d91 | 2008-07-09 16:49:37 +0200 | [diff] [blame] | 332 | int received = 0; |
| 333 | |
Krzysztof Hałasa | 61e0a6a | 2008-07-09 23:13:49 +0200 | [diff] [blame] | 334 | if (isr0 & (port->chan ? 0x08000000 : 0x00080000)) |
Krzysztof Hałasa | abc9d91 | 2008-07-09 16:49:37 +0200 | [diff] [blame] | 335 | sca_msci_intr(port); |
| 336 | |
Krzysztof Hałasa | 61e0a6a | 2008-07-09 23:13:49 +0200 | [diff] [blame] | 337 | if (isr0 & (port->chan ? 0x00002000 : 0x00000020)) |
Krzysztof Hałasa | abc9d91 | 2008-07-09 16:49:37 +0200 | [diff] [blame] | 338 | sca_tx_done(port); |
| 339 | |
Krzysztof Hałasa | 61e0a6a | 2008-07-09 23:13:49 +0200 | [diff] [blame] | 340 | if (isr0 & (port->chan ? 0x00000200 : 0x00000002)) |
Krzysztof Hałasa | abc9d91 | 2008-07-09 16:49:37 +0200 | [diff] [blame] | 341 | received = sca_rx_done(port, budget); |
| 342 | |
| 343 | if (received < budget) { |
Ben Hutchings | 288379f | 2009-01-19 16:43:59 -0800 | [diff] [blame] | 344 | napi_complete(napi); |
Krzysztof Hałasa | abc9d91 | 2008-07-09 16:49:37 +0200 | [diff] [blame] | 345 | enable_intr(port); |
| 346 | } |
| 347 | |
| 348 | return received; |
| 349 | } |
| 350 | |
Krzysztof Hałasa | 0954ed8 | 2008-07-09 21:24:42 +0200 | [diff] [blame] | 351 | static irqreturn_t sca_intr(int irq, void *dev_id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 352 | { |
| 353 | card_t *card = dev_id; |
Krzysztof Hałasa | 0954ed8 | 2008-07-09 21:24:42 +0200 | [diff] [blame] | 354 | u32 isr0 = sca_inl(ISR0, card); |
| 355 | int i, handled = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 356 | |
Krzysztof Hałasa | abc9d91 | 2008-07-09 16:49:37 +0200 | [diff] [blame] | 357 | for (i = 0; i < 2; i++) { |
| 358 | port_t *port = get_port(card, i); |
Krzysztof Hałasa | 0954ed8 | 2008-07-09 21:24:42 +0200 | [diff] [blame] | 359 | if (port && (isr0 & (i ? 0x08002200 : 0x00080022))) { |
Krzysztof Hałasa | abc9d91 | 2008-07-09 16:49:37 +0200 | [diff] [blame] | 360 | handled = 1; |
| 361 | disable_intr(port); |
Ben Hutchings | 288379f | 2009-01-19 16:43:59 -0800 | [diff] [blame] | 362 | napi_schedule(&port->napi); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 363 | } |
| 364 | } |
| 365 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 366 | return IRQ_RETVAL(handled); |
| 367 | } |
| 368 | |
| 369 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 370 | static void sca_set_port(port_t *port) |
| 371 | { |
Krzysztof Hałasa | 61e0a6a | 2008-07-09 23:13:49 +0200 | [diff] [blame] | 372 | card_t* card = port->card; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 373 | u16 msci = get_msci(port); |
| 374 | u8 md2 = sca_in(msci + MD2, card); |
| 375 | unsigned int tmc, br = 10, brv = 1024; |
| 376 | |
| 377 | |
| 378 | if (port->settings.clock_rate > 0) { |
| 379 | /* Try lower br for better accuracy*/ |
| 380 | do { |
| 381 | br--; |
| 382 | brv >>= 1; /* brv = 2^9 = 512 max in specs */ |
| 383 | |
| 384 | /* Baud Rate = CLOCK_BASE / TMC / 2^BR */ |
| 385 | tmc = CLOCK_BASE / brv / port->settings.clock_rate; |
| 386 | }while (br > 1 && tmc <= 128); |
| 387 | |
| 388 | if (tmc < 1) { |
| 389 | tmc = 1; |
| 390 | br = 0; /* For baud=CLOCK_BASE we use tmc=1 br=0 */ |
| 391 | brv = 1; |
| 392 | } else if (tmc > 255) |
| 393 | tmc = 256; /* tmc=0 means 256 - low baud rates */ |
| 394 | |
| 395 | port->settings.clock_rate = CLOCK_BASE / brv / tmc; |
| 396 | } else { |
| 397 | br = 9; /* Minimum clock rate */ |
| 398 | tmc = 256; /* 8bit = 0 */ |
| 399 | port->settings.clock_rate = CLOCK_BASE / (256 * 512); |
| 400 | } |
| 401 | |
| 402 | port->rxs = (port->rxs & ~CLK_BRG_MASK) | br; |
| 403 | port->txs = (port->txs & ~CLK_BRG_MASK) | br; |
| 404 | port->tmc = tmc; |
| 405 | |
| 406 | /* baud divisor - time constant*/ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 407 | sca_out(port->tmc, msci + TMCR, card); |
| 408 | sca_out(port->tmc, msci + TMCT, card); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 409 | |
| 410 | /* Set BRG bits */ |
| 411 | sca_out(port->rxs, msci + RXS, card); |
| 412 | sca_out(port->txs, msci + TXS, card); |
| 413 | |
| 414 | if (port->settings.loopback) |
| 415 | md2 |= MD2_LOOPBACK; |
| 416 | else |
| 417 | md2 &= ~MD2_LOOPBACK; |
| 418 | |
| 419 | sca_out(md2, msci + MD2, card); |
| 420 | |
| 421 | } |
| 422 | |
| 423 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 424 | static void sca_open(struct net_device *dev) |
| 425 | { |
| 426 | port_t *port = dev_to_port(dev); |
Krzysztof Hałasa | 61e0a6a | 2008-07-09 23:13:49 +0200 | [diff] [blame] | 427 | card_t* card = port->card; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 428 | u16 msci = get_msci(port); |
| 429 | u8 md0, md2; |
| 430 | |
| 431 | switch(port->encoding) { |
| 432 | case ENCODING_NRZ: md2 = MD2_NRZ; break; |
| 433 | case ENCODING_NRZI: md2 = MD2_NRZI; break; |
| 434 | case ENCODING_FM_MARK: md2 = MD2_FM_MARK; break; |
| 435 | case ENCODING_FM_SPACE: md2 = MD2_FM_SPACE; break; |
| 436 | default: md2 = MD2_MANCHESTER; |
| 437 | } |
| 438 | |
| 439 | if (port->settings.loopback) |
| 440 | md2 |= MD2_LOOPBACK; |
| 441 | |
| 442 | switch(port->parity) { |
| 443 | case PARITY_CRC16_PR0: md0 = MD0_HDLC | MD0_CRC_16_0; break; |
| 444 | case PARITY_CRC16_PR1: md0 = MD0_HDLC | MD0_CRC_16; break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 445 | case PARITY_CRC32_PR1_CCITT: md0 = MD0_HDLC | MD0_CRC_ITU32; break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 446 | case PARITY_CRC16_PR1_CCITT: md0 = MD0_HDLC | MD0_CRC_ITU; break; |
| 447 | default: md0 = MD0_HDLC | MD0_CRC_NONE; |
| 448 | } |
| 449 | |
| 450 | sca_out(CMD_RESET, msci + CMD, card); |
| 451 | sca_out(md0, msci + MD0, card); |
| 452 | sca_out(0x00, msci + MD1, card); /* no address field check */ |
| 453 | sca_out(md2, msci + MD2, card); |
| 454 | sca_out(0x7E, msci + IDL, card); /* flag character 0x7E */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 455 | /* Skip the rest of underrun frame */ |
| 456 | sca_out(CTL_IDLE | CTL_URCT | CTL_URSKP, msci + CTL, card); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 457 | sca_out(0x0F, msci + RNR, card); /* +1=RX DMA activation condition */ |
| 458 | sca_out(0x3C, msci + TFS, card); /* +1 = TX start */ |
| 459 | sca_out(0x38, msci + TCR, card); /* =Critical TX DMA activ condition */ |
| 460 | sca_out(0x38, msci + TNR0, card); /* =TX DMA activation condition */ |
| 461 | sca_out(0x3F, msci + TNR1, card); /* +1=TX DMA deactivation condition*/ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 462 | |
| 463 | /* We're using the following interrupts: |
Krzysztof Hałasa | 0446c3b | 2008-07-09 19:28:45 +0200 | [diff] [blame] | 464 | - RXINTA (DCD changes only) |
| 465 | - DMIB (EOM - single frame transfer complete) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 466 | */ |
Krzysztof Hałasa | 0446c3b | 2008-07-09 19:28:45 +0200 | [diff] [blame] | 467 | sca_outl(IE0_RXINTA | IE0_CDCD, msci + IE0, card); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 468 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 469 | sca_out(port->tmc, msci + TMCR, card); |
| 470 | sca_out(port->tmc, msci + TMCT, card); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 471 | sca_out(port->rxs, msci + RXS, card); |
| 472 | sca_out(port->txs, msci + TXS, card); |
| 473 | sca_out(CMD_TX_ENABLE, msci + CMD, card); |
| 474 | sca_out(CMD_RX_ENABLE, msci + CMD, card); |
| 475 | |
Krzysztof Hałasa | abc9d91 | 2008-07-09 16:49:37 +0200 | [diff] [blame] | 476 | sca_set_carrier(port); |
| 477 | enable_intr(port); |
| 478 | napi_enable(&port->napi); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 479 | netif_start_queue(dev); |
| 480 | } |
| 481 | |
| 482 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 483 | static void sca_close(struct net_device *dev) |
| 484 | { |
| 485 | port_t *port = dev_to_port(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 486 | |
| 487 | /* reset channel */ |
Krzysztof Hałasa | 61e0a6a | 2008-07-09 23:13:49 +0200 | [diff] [blame] | 488 | sca_out(CMD_RESET, get_msci(port) + CMD, port->card); |
Krzysztof Hałasa | abc9d91 | 2008-07-09 16:49:37 +0200 | [diff] [blame] | 489 | disable_intr(port); |
| 490 | napi_disable(&port->napi); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 491 | netif_stop_queue(dev); |
| 492 | } |
| 493 | |
| 494 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 495 | static int sca_attach(struct net_device *dev, unsigned short encoding, |
| 496 | unsigned short parity) |
| 497 | { |
| 498 | if (encoding != ENCODING_NRZ && |
| 499 | encoding != ENCODING_NRZI && |
| 500 | encoding != ENCODING_FM_MARK && |
| 501 | encoding != ENCODING_FM_SPACE && |
| 502 | encoding != ENCODING_MANCHESTER) |
| 503 | return -EINVAL; |
| 504 | |
| 505 | if (parity != PARITY_NONE && |
| 506 | parity != PARITY_CRC16_PR0 && |
| 507 | parity != PARITY_CRC16_PR1 && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 508 | parity != PARITY_CRC32_PR1_CCITT && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 509 | parity != PARITY_CRC16_PR1_CCITT) |
| 510 | return -EINVAL; |
| 511 | |
| 512 | dev_to_port(dev)->encoding = encoding; |
| 513 | dev_to_port(dev)->parity = parity; |
| 514 | return 0; |
| 515 | } |
| 516 | |
| 517 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 518 | #ifdef DEBUG_RINGS |
| 519 | static void sca_dump_rings(struct net_device *dev) |
| 520 | { |
| 521 | port_t *port = dev_to_port(dev); |
Krzysztof Hałasa | 61e0a6a | 2008-07-09 23:13:49 +0200 | [diff] [blame] | 522 | card_t *card = port->card; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 523 | u16 cnt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 524 | |
| 525 | printk(KERN_DEBUG "RX ring: CDA=%u EDA=%u DSR=%02X in=%u %sactive", |
Krzysztof Hałasa | 3022439 | 2008-03-24 20:24:23 +0100 | [diff] [blame] | 526 | sca_inl(get_dmac_rx(port) + CDAL, card), |
| 527 | sca_inl(get_dmac_rx(port) + EDAL, card), |
Krzysztof Hałasa | 61e0a6a | 2008-07-09 23:13:49 +0200 | [diff] [blame] | 528 | sca_in(DSR_RX(port->chan), card), port->rxin, |
| 529 | sca_in(DSR_RX(port->chan), card) & DSR_DE ? "" : "in"); |
| 530 | for (cnt = 0; cnt < port->card->rx_ring_buffers; cnt++) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 531 | printk(" %02X", readb(&(desc_address(port, cnt, 0)->stat))); |
Joe Perches | ad361c9 | 2009-07-06 13:05:40 -0700 | [diff] [blame] | 532 | printk(KERN_CONT "\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 533 | |
Joe Perches | ad361c9 | 2009-07-06 13:05:40 -0700 | [diff] [blame] | 534 | printk(KERN_DEBUG "TX ring: CDA=%u EDA=%u DSR=%02X in=%u " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 535 | "last=%u %sactive", |
Krzysztof Hałasa | 3022439 | 2008-03-24 20:24:23 +0100 | [diff] [blame] | 536 | sca_inl(get_dmac_tx(port) + CDAL, card), |
| 537 | sca_inl(get_dmac_tx(port) + EDAL, card), |
Krzysztof Hałasa | 61e0a6a | 2008-07-09 23:13:49 +0200 | [diff] [blame] | 538 | sca_in(DSR_TX(port->chan), card), port->txin, port->txlast, |
| 539 | sca_in(DSR_TX(port->chan), card) & DSR_DE ? "" : "in"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 540 | |
Krzysztof Hałasa | 61e0a6a | 2008-07-09 23:13:49 +0200 | [diff] [blame] | 541 | for (cnt = 0; cnt < port->card->tx_ring_buffers; cnt++) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 542 | printk(" %02X", readb(&(desc_address(port, cnt, 1)->stat))); |
| 543 | printk("\n"); |
| 544 | |
Krzysztof Hałasa | 3022439 | 2008-03-24 20:24:23 +0100 | [diff] [blame] | 545 | printk(KERN_DEBUG "MSCI: MD: %02x %02x %02x," |
| 546 | " ST: %02x %02x %02x %02x %02x, FST: %02x CST: %02x %02x\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 547 | sca_in(get_msci(port) + MD0, card), |
| 548 | sca_in(get_msci(port) + MD1, card), |
| 549 | sca_in(get_msci(port) + MD2, card), |
| 550 | sca_in(get_msci(port) + ST0, card), |
| 551 | sca_in(get_msci(port) + ST1, card), |
| 552 | sca_in(get_msci(port) + ST2, card), |
| 553 | sca_in(get_msci(port) + ST3, card), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 554 | sca_in(get_msci(port) + ST4, card), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 555 | sca_in(get_msci(port) + FST, card), |
| 556 | sca_in(get_msci(port) + CST0, card), |
| 557 | sca_in(get_msci(port) + CST1, card)); |
| 558 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 559 | printk(KERN_DEBUG "ILAR: %02x ISR: %08x %08x\n", sca_in(ILAR, card), |
| 560 | sca_inl(ISR0, card), sca_inl(ISR1, card)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 561 | } |
| 562 | #endif /* DEBUG_RINGS */ |
| 563 | |
| 564 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 565 | static int sca_xmit(struct sk_buff *skb, struct net_device *dev) |
| 566 | { |
| 567 | port_t *port = dev_to_port(dev); |
Krzysztof Hałasa | 61e0a6a | 2008-07-09 23:13:49 +0200 | [diff] [blame] | 568 | card_t *card = port->card; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 569 | pkt_desc __iomem *desc; |
| 570 | u32 buff, len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 571 | |
| 572 | spin_lock_irq(&port->lock); |
| 573 | |
| 574 | desc = desc_address(port, port->txin + 1, 1); |
Krzysztof Hałasa | 3022439 | 2008-03-24 20:24:23 +0100 | [diff] [blame] | 575 | BUG_ON(readb(&desc->stat)); /* previous xmit should stop queue */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 576 | |
| 577 | #ifdef DEBUG_PKT |
| 578 | printk(KERN_DEBUG "%s TX(%i):", dev->name, skb->len); |
| 579 | debug_frame(skb); |
| 580 | #endif |
| 581 | |
| 582 | desc = desc_address(port, port->txin, 1); |
| 583 | buff = buffer_offset(port, port->txin, 1); |
| 584 | len = skb->len; |
Krzysztof Hałasa | 61e0a6a | 2008-07-09 23:13:49 +0200 | [diff] [blame] | 585 | memcpy_toio(card->rambase + buff, skb->data, len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 586 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 587 | writew(len, &desc->len); |
| 588 | writeb(ST_TX_EOM, &desc->stat); |
| 589 | dev->trans_start = jiffies; |
| 590 | |
Krzysztof Hałasa | 0b59cef | 2008-07-09 23:39:12 +0200 | [diff] [blame] | 591 | port->txin = (port->txin + 1) % card->tx_ring_buffers; |
Krzysztof Hałasa | 3022439 | 2008-03-24 20:24:23 +0100 | [diff] [blame] | 592 | sca_outl(desc_offset(port, port->txin, 1), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 593 | get_dmac_tx(port) + EDAL, card); |
| 594 | |
Krzysztof Hałasa | 61e0a6a | 2008-07-09 23:13:49 +0200 | [diff] [blame] | 595 | sca_out(DSR_DE, DSR_TX(port->chan), card); /* Enable TX DMA */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 596 | |
| 597 | desc = desc_address(port, port->txin + 1, 1); |
| 598 | if (readb(&desc->stat)) /* allow 1 packet gap */ |
| 599 | netif_stop_queue(dev); |
| 600 | |
| 601 | spin_unlock_irq(&port->lock); |
| 602 | |
| 603 | dev_kfree_skb(skb); |
| 604 | return 0; |
| 605 | } |
| 606 | |
| 607 | |
Krzysztof Hałasa | 3022439 | 2008-03-24 20:24:23 +0100 | [diff] [blame] | 608 | static u32 __devinit sca_detect_ram(card_t *card, u8 __iomem *rambase, |
| 609 | u32 ramsize) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 610 | { |
| 611 | /* Round RAM size to 32 bits, fill from end to start */ |
| 612 | u32 i = ramsize &= ~3; |
| 613 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 614 | do { |
| 615 | i -= 4; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 616 | writel(i ^ 0x12345678, rambase + i); |
Krzysztof Hałasa | 3022439 | 2008-03-24 20:24:23 +0100 | [diff] [blame] | 617 | } while (i > 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 618 | |
| 619 | for (i = 0; i < ramsize ; i += 4) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 620 | if (readl(rambase + i) != (i ^ 0x12345678)) |
| 621 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 622 | } |
| 623 | |
| 624 | return i; |
| 625 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 626 | |
| 627 | |
| 628 | static void __devinit sca_init(card_t *card, int wait_states) |
| 629 | { |
| 630 | sca_out(wait_states, WCRL, card); /* Wait Control */ |
| 631 | sca_out(wait_states, WCRM, card); |
| 632 | sca_out(wait_states, WCRH, card); |
| 633 | |
| 634 | sca_out(0, DMER, card); /* DMA Master disable */ |
| 635 | sca_out(0x03, PCR, card); /* DMA priority */ |
| 636 | sca_out(0, DSR_RX(0), card); /* DMA disable - to halt state */ |
| 637 | sca_out(0, DSR_TX(0), card); |
| 638 | sca_out(0, DSR_RX(1), card); |
| 639 | sca_out(0, DSR_TX(1), card); |
| 640 | sca_out(DMER_DME, DMER, card); /* DMA Master enable */ |
| 641 | } |