From 6b40aba304e6f94c747ad9559e03ea03a49e8008 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Krzysztof=20Ha=C5=82asa?= Date: Mon, 24 Mar 2008 16:39:02 +0100 Subject: WAN: split hd6457x.c into hd64570.c and hd64572.c MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Supporting both original SCA and SCA-II in one file was nice at some point but now it's increasingly painful. Signed-off-by: Krzysztof Hałasa --- drivers/net/wan/c101.c | 2 +- drivers/net/wan/hd64570.c | 867 ++++++++++++++++++++++++++++++++++++++++++++ drivers/net/wan/hd64572.c | 867 ++++++++++++++++++++++++++++++++++++++++++++ drivers/net/wan/hd6457x.c | 867 -------------------------------------------- drivers/net/wan/n2.c | 2 +- drivers/net/wan/pc300too.c | 2 +- drivers/net/wan/pci200syn.c | 2 +- 7 files changed, 1738 insertions(+), 871 deletions(-) create mode 100644 drivers/net/wan/hd64570.c create mode 100644 drivers/net/wan/hd64572.c delete mode 100644 drivers/net/wan/hd6457x.c (limited to 'drivers') diff --git a/drivers/net/wan/c101.c b/drivers/net/wan/c101.c index c8e563106a4..23d66060db8 100644 --- a/drivers/net/wan/c101.c +++ b/drivers/net/wan/c101.c @@ -113,7 +113,7 @@ static inline void openwin(card_t *card, u8 page) } -#include "hd6457x.c" +#include "hd64570.c" static inline void set_carrier(port_t *port) diff --git a/drivers/net/wan/hd64570.c b/drivers/net/wan/hd64570.c new file mode 100644 index 00000000000..434583a94b3 --- /dev/null +++ b/drivers/net/wan/hd64570.c @@ -0,0 +1,867 @@ +/* + * Hitachi SCA HD64570 and HD64572 common driver for Linux + * + * Copyright (C) 1998-2003 Krzysztof Halasa + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of version 2 of the GNU General Public License + * as published by the Free Software Foundation. + * + * Sources of information: + * Hitachi HD64570 SCA User's Manual + * Hitachi HD64572 SCA-II User's Manual + * + * We use the following SCA memory map: + * + * Packet buffer descriptor rings - starting from winbase or win0base: + * rx_ring_buffers * sizeof(pkt_desc) = logical channel #0 RX ring + * tx_ring_buffers * sizeof(pkt_desc) = logical channel #0 TX ring + * rx_ring_buffers * sizeof(pkt_desc) = logical channel #1 RX ring (if used) + * tx_ring_buffers * sizeof(pkt_desc) = logical channel #1 TX ring (if used) + * + * Packet data buffers - starting from winbase + buff_offset: + * rx_ring_buffers * HDLC_MAX_MRU = logical channel #0 RX buffers + * tx_ring_buffers * HDLC_MAX_MRU = logical channel #0 TX buffers + * rx_ring_buffers * HDLC_MAX_MRU = logical channel #0 RX buffers (if used) + * tx_ring_buffers * HDLC_MAX_MRU = logical channel #0 TX buffers (if used) + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include + +#include +#include + +#include + +#if (!defined (__HD64570_H) && !defined (__HD64572_H)) || \ + (defined (__HD64570_H) && defined (__HD64572_H)) +#error Either hd64570.h or hd64572.h must be included +#endif + +#define get_msci(port) (phy_node(port) ? MSCI1_OFFSET : MSCI0_OFFSET) +#define get_dmac_rx(port) (phy_node(port) ? DMAC1RX_OFFSET : DMAC0RX_OFFSET) +#define get_dmac_tx(port) (phy_node(port) ? DMAC1TX_OFFSET : DMAC0TX_OFFSET) + +#define SCA_INTR_MSCI(node) (node ? 0x10 : 0x01) +#define SCA_INTR_DMAC_RX(node) (node ? 0x20 : 0x02) +#define SCA_INTR_DMAC_TX(node) (node ? 0x40 : 0x04) + +#ifdef __HD64570_H /* HD64570 */ +#define sca_outa(value, reg, card) sca_outw(value, reg, card) +#define sca_ina(reg, card) sca_inw(reg, card) +#define writea(value, ptr) writew(value, ptr) + +#else /* HD64572 */ +#define sca_outa(value, reg, card) sca_outl(value, reg, card) +#define sca_ina(reg, card) sca_inl(reg, card) +#define writea(value, ptr) writel(value, ptr) +#endif + +static inline struct net_device *port_to_dev(port_t *port) +{ + return port->dev; +} + +static inline int sca_intr_status(card_t *card) +{ + u8 result = 0; + +#ifdef __HD64570_H /* HD64570 */ + u8 isr0 = sca_in(ISR0, card); + u8 isr1 = sca_in(ISR1, card); + + if (isr1 & 0x03) result |= SCA_INTR_DMAC_RX(0); + if (isr1 & 0x0C) result |= SCA_INTR_DMAC_TX(0); + if (isr1 & 0x30) result |= SCA_INTR_DMAC_RX(1); + if (isr1 & 0xC0) result |= SCA_INTR_DMAC_TX(1); + if (isr0 & 0x0F) result |= SCA_INTR_MSCI(0); + if (isr0 & 0xF0) result |= SCA_INTR_MSCI(1); + +#else /* HD64572 */ + u32 isr0 = sca_inl(ISR0, card); + + if (isr0 & 0x0000000F) result |= SCA_INTR_DMAC_RX(0); + if (isr0 & 0x000000F0) result |= SCA_INTR_DMAC_TX(0); + if (isr0 & 0x00000F00) result |= SCA_INTR_DMAC_RX(1); + if (isr0 & 0x0000F000) result |= SCA_INTR_DMAC_TX(1); + if (isr0 & 0x003E0000) result |= SCA_INTR_MSCI(0); + if (isr0 & 0x3E000000) result |= SCA_INTR_MSCI(1); + +#endif /* HD64570 vs HD64572 */ + + if (!(result & SCA_INTR_DMAC_TX(0))) + if (sca_in(DSR_TX(0), card) & DSR_EOM) + result |= SCA_INTR_DMAC_TX(0); + if (!(result & SCA_INTR_DMAC_TX(1))) + if (sca_in(DSR_TX(1), card) & DSR_EOM) + result |= SCA_INTR_DMAC_TX(1); + + return result; +} + +static inline port_t* dev_to_port(struct net_device *dev) +{ + return dev_to_hdlc(dev)->priv; +} + +static inline u16 next_desc(port_t *port, u16 desc, int transmit) +{ + return (desc + 1) % (transmit ? port_to_card(port)->tx_ring_buffers + : port_to_card(port)->rx_ring_buffers); +} + + + +static inline u16 desc_abs_number(port_t *port, u16 desc, int transmit) +{ + u16 rx_buffs = port_to_card(port)->rx_ring_buffers; + u16 tx_buffs = port_to_card(port)->tx_ring_buffers; + + desc %= (transmit ? tx_buffs : rx_buffs); // called with "X + 1" etc. + return log_node(port) * (rx_buffs + tx_buffs) + + transmit * rx_buffs + desc; +} + + + +static inline u16 desc_offset(port_t *port, u16 desc, int transmit) +{ + /* Descriptor offset always fits in 16 bytes */ + return desc_abs_number(port, desc, transmit) * sizeof(pkt_desc); +} + + + +static inline pkt_desc __iomem *desc_address(port_t *port, u16 desc, int transmit) +{ +#ifdef PAGE0_ALWAYS_MAPPED + return (pkt_desc __iomem *)(win0base(port_to_card(port)) + + desc_offset(port, desc, transmit)); +#else + return (pkt_desc __iomem *)(winbase(port_to_card(port)) + + desc_offset(port, desc, transmit)); +#endif +} + + + +static inline u32 buffer_offset(port_t *port, u16 desc, int transmit) +{ + return port_to_card(port)->buff_offset + + desc_abs_number(port, desc, transmit) * (u32)HDLC_MAX_MRU; +} + + +static inline void sca_set_carrier(port_t *port) +{ + if (!(sca_in(get_msci(port) + ST3, port_to_card(port)) & ST3_DCD)) { +#ifdef DEBUG_LINK + printk(KERN_DEBUG "%s: sca_set_carrier on\n", + port_to_dev(port)->name); +#endif + netif_carrier_on(port_to_dev(port)); + } else { +#ifdef DEBUG_LINK + printk(KERN_DEBUG "%s: sca_set_carrier off\n", + port_to_dev(port)->name); +#endif + netif_carrier_off(port_to_dev(port)); + } +} + + +static void sca_init_sync_port(port_t *port) +{ + card_t *card = port_to_card(port); + int transmit, i; + + port->rxin = 0; + port->txin = 0; + port->txlast = 0; + +#if !defined(PAGE0_ALWAYS_MAPPED) && !defined(ALL_PAGES_ALWAYS_MAPPED) + openwin(card, 0); +#endif + + for (transmit = 0; transmit < 2; transmit++) { + u16 dmac = transmit ? get_dmac_tx(port) : get_dmac_rx(port); + u16 buffs = transmit ? card->tx_ring_buffers + : card->rx_ring_buffers; + + for (i = 0; i < buffs; i++) { + pkt_desc __iomem *desc = desc_address(port, i, transmit); + u16 chain_off = desc_offset(port, i + 1, transmit); + u32 buff_off = buffer_offset(port, i, transmit); + + writea(chain_off, &desc->cp); + writel(buff_off, &desc->bp); + writew(0, &desc->len); + writeb(0, &desc->stat); + } + + /* DMA disable - to halt state */ + sca_out(0, transmit ? DSR_TX(phy_node(port)) : + DSR_RX(phy_node(port)), card); + /* software ABORT - to initial state */ + sca_out(DCR_ABORT, transmit ? DCR_TX(phy_node(port)) : + DCR_RX(phy_node(port)), card); + +#ifdef __HD64570_H + sca_out(0, dmac + CPB, card); /* pointer base */ +#endif + /* current desc addr */ + sca_outa(desc_offset(port, 0, transmit), dmac + CDAL, card); + if (!transmit) + sca_outa(desc_offset(port, buffs - 1, transmit), + dmac + EDAL, card); + else + sca_outa(desc_offset(port, 0, transmit), dmac + EDAL, + card); + + /* clear frame end interrupt counter */ + sca_out(DCR_CLEAR_EOF, transmit ? DCR_TX(phy_node(port)) : + DCR_RX(phy_node(port)), card); + + if (!transmit) { /* Receive */ + /* set buffer length */ + sca_outw(HDLC_MAX_MRU, dmac + BFLL, card); + /* Chain mode, Multi-frame */ + sca_out(0x14, DMR_RX(phy_node(port)), card); + sca_out(DIR_EOME | DIR_BOFE, DIR_RX(phy_node(port)), + card); + /* DMA enable */ + sca_out(DSR_DE, DSR_RX(phy_node(port)), card); + } else { /* Transmit */ + /* Chain mode, Multi-frame */ + sca_out(0x14, DMR_TX(phy_node(port)), card); + /* enable underflow interrupts */ + sca_out(DIR_BOFE, DIR_TX(phy_node(port)), card); + } + } + sca_set_carrier(port); +} + + + +#ifdef NEED_SCA_MSCI_INTR +/* MSCI interrupt service */ +static inline void sca_msci_intr(port_t *port) +{ + u16 msci = get_msci(port); + card_t* card = port_to_card(port); + u8 stat = sca_in(msci + ST1, card); /* read MSCI ST1 status */ + + /* Reset MSCI TX underrun and CDCD status bit */ + sca_out(stat & (ST1_UDRN | ST1_CDCD), msci + ST1, card); + + if (stat & ST1_UDRN) { + /* TX Underrun error detected */ + port_to_dev(port)->stats.tx_errors++; + port_to_dev(port)->stats.tx_fifo_errors++; + } + + if (stat & ST1_CDCD) + sca_set_carrier(port); +} +#endif + + + +static inline void sca_rx(card_t *card, port_t *port, pkt_desc __iomem *desc, u16 rxin) +{ + struct net_device *dev = port_to_dev(port); + struct sk_buff *skb; + u16 len; + u32 buff; +#ifndef ALL_PAGES_ALWAYS_MAPPED + u32 maxlen; + u8 page; +#endif + + len = readw(&desc->len); + skb = dev_alloc_skb(len); + if (!skb) { + dev->stats.rx_dropped++; + return; + } + + buff = buffer_offset(port, rxin, 0); +#ifndef ALL_PAGES_ALWAYS_MAPPED + page = buff / winsize(card); + buff = buff % winsize(card); + maxlen = winsize(card) - buff; + + openwin(card, page); + + if (len > maxlen) { + memcpy_fromio(skb->data, winbase(card) + buff, maxlen); + openwin(card, page + 1); + memcpy_fromio(skb->data + maxlen, winbase(card), len - maxlen); + } else +#endif + memcpy_fromio(skb->data, winbase(card) + buff, len); + +#if !defined(PAGE0_ALWAYS_MAPPED) && !defined(ALL_PAGES_ALWAYS_MAPPED) + /* select pkt_desc table page back */ + openwin(card, 0); +#endif + skb_put(skb, len); +#ifdef DEBUG_PKT + printk(KERN_DEBUG "%s RX(%i):", dev->name, skb->len); + debug_frame(skb); +#endif + dev->stats.rx_packets++; + dev->stats.rx_bytes += skb->len; + skb->protocol = hdlc_type_trans(skb, dev); + netif_rx(skb); +} + + + +/* Receive DMA interrupt service */ +static inline void sca_rx_intr(port_t *port) +{ + struct net_device *dev = port_to_dev(port); + u16 dmac = get_dmac_rx(port); + card_t *card = port_to_card(port); + u8 stat = sca_in(DSR_RX(phy_node(port)), card); /* read DMA Status */ + + /* Reset DSR status bits */ + sca_out((stat & (DSR_EOT | DSR_EOM | DSR_BOF | DSR_COF)) | DSR_DWE, + DSR_RX(phy_node(port)), card); + + if (stat & DSR_BOF) + /* Dropped one or more frames */ + dev->stats.rx_over_errors++; + + while (1) { + u32 desc_off = desc_offset(port, port->rxin, 0); + pkt_desc __iomem *desc; + u32 cda = sca_ina(dmac + CDAL, card); + + if ((cda >= desc_off) && (cda < desc_off + sizeof(pkt_desc))) + break; /* No frame received */ + + desc = desc_address(port, port->rxin, 0); + stat = readb(&desc->stat); + if (!(stat & ST_RX_EOM)) + port->rxpart = 1; /* partial frame received */ + else if ((stat & ST_ERROR_MASK) || port->rxpart) { + dev->stats.rx_errors++; + if (stat & ST_RX_OVERRUN) + dev->stats.rx_fifo_errors++; + else if ((stat & (ST_RX_SHORT | ST_RX_ABORT | + ST_RX_RESBIT)) || port->rxpart) + dev->stats.rx_frame_errors++; + else if (stat & ST_RX_CRC) + dev->stats.rx_crc_errors++; + if (stat & ST_RX_EOM) + port->rxpart = 0; /* received last fragment */ + } else + sca_rx(card, port, desc, port->rxin); + + /* Set new error descriptor address */ + sca_outa(desc_off, dmac + EDAL, card); + port->rxin = next_desc(port, port->rxin, 0); + } + + /* make sure RX DMA is enabled */ + sca_out(DSR_DE, DSR_RX(phy_node(port)), card); +} + + + +/* Transmit DMA interrupt service */ +static inline void sca_tx_intr(port_t *port) +{ + struct net_device *dev = port_to_dev(port); + u16 dmac = get_dmac_tx(port); + card_t* card = port_to_card(port); + u8 stat; + + spin_lock(&port->lock); + + stat = sca_in(DSR_TX(phy_node(port)), card); /* read DMA Status */ + + /* Reset DSR status bits */ + sca_out((stat & (DSR_EOT | DSR_EOM | DSR_BOF | DSR_COF)) | DSR_DWE, + DSR_TX(phy_node(port)), card); + + while (1) { + pkt_desc __iomem *desc; + + u32 desc_off = desc_offset(port, port->txlast, 1); + u32 cda = sca_ina(dmac + CDAL, card); + if ((cda >= desc_off) && (cda < desc_off + sizeof(pkt_desc))) + break; /* Transmitter is/will_be sending this frame */ + + desc = desc_address(port, port->txlast, 1); + dev->stats.tx_packets++; + dev->stats.tx_bytes += readw(&desc->len); + writeb(0, &desc->stat); /* Free descriptor */ + port->txlast = next_desc(port, port->txlast, 1); + } + + netif_wake_queue(dev); + spin_unlock(&port->lock); +} + + + +static irqreturn_t sca_intr(int irq, void* dev_id) +{ + card_t *card = dev_id; + int i; + u8 stat; + int handled = 0; + +#ifndef ALL_PAGES_ALWAYS_MAPPED + u8 page = sca_get_page(card); +#endif + + while((stat = sca_intr_status(card)) != 0) { + handled = 1; + for (i = 0; i < 2; i++) { + port_t *port = get_port(card, i); + if (port) { + if (stat & SCA_INTR_MSCI(i)) + sca_msci_intr(port); + + if (stat & SCA_INTR_DMAC_RX(i)) + sca_rx_intr(port); + + if (stat & SCA_INTR_DMAC_TX(i)) + sca_tx_intr(port); + } + } + } + +#ifndef ALL_PAGES_ALWAYS_MAPPED + openwin(card, page); /* Restore original page */ +#endif + return IRQ_RETVAL(handled); +} + + + +static void sca_set_port(port_t *port) +{ + card_t* card = port_to_card(port); + u16 msci = get_msci(port); + u8 md2 = sca_in(msci + MD2, card); + unsigned int tmc, br = 10, brv = 1024; + + + if (port->settings.clock_rate > 0) { + /* Try lower br for better accuracy*/ + do { + br--; + brv >>= 1; /* brv = 2^9 = 512 max in specs */ + + /* Baud Rate = CLOCK_BASE / TMC / 2^BR */ + tmc = CLOCK_BASE / brv / port->settings.clock_rate; + }while (br > 1 && tmc <= 128); + + if (tmc < 1) { + tmc = 1; + br = 0; /* For baud=CLOCK_BASE we use tmc=1 br=0 */ + brv = 1; + } else if (tmc > 255) + tmc = 256; /* tmc=0 means 256 - low baud rates */ + + port->settings.clock_rate = CLOCK_BASE / brv / tmc; + } else { + br = 9; /* Minimum clock rate */ + tmc = 256; /* 8bit = 0 */ + port->settings.clock_rate = CLOCK_BASE / (256 * 512); + } + + port->rxs = (port->rxs & ~CLK_BRG_MASK) | br; + port->txs = (port->txs & ~CLK_BRG_MASK) | br; + port->tmc = tmc; + + /* baud divisor - time constant*/ +#ifdef __HD64570_H + sca_out(port->tmc, msci + TMC, card); +#else + sca_out(port->tmc, msci + TMCR, card); + sca_out(port->tmc, msci + TMCT, card); +#endif + + /* Set BRG bits */ + sca_out(port->rxs, msci + RXS, card); + sca_out(port->txs, msci + TXS, card); + + if (port->settings.loopback) + md2 |= MD2_LOOPBACK; + else + md2 &= ~MD2_LOOPBACK; + + sca_out(md2, msci + MD2, card); + +} + + + +static void sca_open(struct net_device *dev) +{ + port_t *port = dev_to_port(dev); + card_t* card = port_to_card(port); + u16 msci = get_msci(port); + u8 md0, md2; + + switch(port->encoding) { + case ENCODING_NRZ: md2 = MD2_NRZ; break; + case ENCODING_NRZI: md2 = MD2_NRZI; break; + case ENCODING_FM_MARK: md2 = MD2_FM_MARK; break; + case ENCODING_FM_SPACE: md2 = MD2_FM_SPACE; break; + default: md2 = MD2_MANCHESTER; + } + + if (port->settings.loopback) + md2 |= MD2_LOOPBACK; + + switch(port->parity) { + case PARITY_CRC16_PR0: md0 = MD0_HDLC | MD0_CRC_16_0; break; + case PARITY_CRC16_PR1: md0 = MD0_HDLC | MD0_CRC_16; break; +#ifdef __HD64570_H + case PARITY_CRC16_PR0_CCITT: md0 = MD0_HDLC | MD0_CRC_ITU_0; break; +#else + case PARITY_CRC32_PR1_CCITT: md0 = MD0_HDLC | MD0_CRC_ITU32; break; +#endif + case PARITY_CRC16_PR1_CCITT: md0 = MD0_HDLC | MD0_CRC_ITU; break; + default: md0 = MD0_HDLC | MD0_CRC_NONE; + } + + sca_out(CMD_RESET, msci + CMD, card); + sca_out(md0, msci + MD0, card); + sca_out(0x00, msci + MD1, card); /* no address field check */ + sca_out(md2, msci + MD2, card); + sca_out(0x7E, msci + IDL, card); /* flag character 0x7E */ +#ifdef __HD64570_H + sca_out(CTL_IDLE, msci + CTL, card); +#else + /* Skip the rest of underrun frame */ + sca_out(CTL_IDLE | CTL_URCT | CTL_URSKP, msci + CTL, card); +#endif + +#ifdef __HD64570_H + /* Allow at least 8 bytes before requesting RX DMA operation */ + /* TX with higher priority and possibly with shorter transfers */ + sca_out(0x07, msci + RRC, card); /* +1=RXRDY/DMA activation condition*/ + sca_out(0x10, msci + TRC0, card); /* = TXRDY/DMA activation condition*/ + sca_out(0x14, msci + TRC1, card); /* +1=TXRDY/DMA deactiv condition */ +#else + sca_out(0x0F, msci + RNR, card); /* +1=RX DMA activation condition */ + sca_out(0x3C, msci + TFS, card); /* +1 = TX start */ + sca_out(0x38, msci + TCR, card); /* =Critical TX DMA activ condition */ + sca_out(0x38, msci + TNR0, card); /* =TX DMA activation condition */ + sca_out(0x3F, msci + TNR1, card); /* +1=TX DMA deactivation condition*/ +#endif + +/* We're using the following interrupts: + - TXINT (DMAC completed all transmisions, underrun or DCD change) + - all DMA interrupts +*/ + + sca_set_carrier(port); + +#ifdef __HD64570_H + /* MSCI TX INT and RX INT A IRQ enable */ + sca_out(IE0_TXINT | IE0_RXINTA, msci + IE0, card); + sca_out(IE1_UDRN | IE1_CDCD, msci + IE1, card); + sca_out(sca_in(IER0, card) | (phy_node(port) ? 0xC0 : 0x0C), + IER0, card); /* TXINT and RXINT */ + /* enable DMA IRQ */ + sca_out(sca_in(IER1, card) | (phy_node(port) ? 0xF0 : 0x0F), + IER1, card); +#else + /* MSCI TXINT and RXINTA interrupt enable */ + sca_outl(IE0_TXINT | IE0_RXINTA | IE0_UDRN | IE0_CDCD, msci + IE0, + card); + /* DMA & MSCI IRQ enable */ + sca_outl(sca_inl(IER0, card) | + (phy_node(port) ? 0x0A006600 : 0x000A0066), IER0, card); +#endif + +#ifdef __HD64570_H + sca_out(port->tmc, msci + TMC, card); /* Restore registers */ +#else + sca_out(port->tmc, msci + TMCR, card); + sca_out(port->tmc, msci + TMCT, card); +#endif + sca_out(port->rxs, msci + RXS, card); + sca_out(port->txs, msci + TXS, card); + sca_out(CMD_TX_ENABLE, msci + CMD, card); + sca_out(CMD_RX_ENABLE, msci + CMD, card); + + netif_start_queue(dev); +} + + + +static void sca_close(struct net_device *dev) +{ + port_t *port = dev_to_port(dev); + card_t* card = port_to_card(port); + + /* reset channel */ + sca_out(CMD_RESET, get_msci(port) + CMD, port_to_card(port)); +#ifdef __HD64570_H + /* disable MSCI interrupts */ + sca_out(sca_in(IER0, card) & (phy_node(port) ? 0x0F : 0xF0), + IER0, card); + /* disable DMA interrupts */ + sca_out(sca_in(IER1, card) & (phy_node(port) ? 0x0F : 0xF0), + IER1, card); +#else + /* disable DMA & MSCI IRQ */ + sca_outl(sca_inl(IER0, card) & + (phy_node(port) ? 0x00FF00FF : 0xFF00FF00), IER0, card); +#endif + netif_stop_queue(dev); +} + + + +static int sca_attach(struct net_device *dev, unsigned short encoding, + unsigned short parity) +{ + if (encoding != ENCODING_NRZ && + encoding != ENCODING_NRZI && + encoding != ENCODING_FM_MARK && + encoding != ENCODING_FM_SPACE && + encoding != ENCODING_MANCHESTER) + return -EINVAL; + + if (parity != PARITY_NONE && + parity != PARITY_CRC16_PR0 && + parity != PARITY_CRC16_PR1 && +#ifdef __HD64570_H + parity != PARITY_CRC16_PR0_CCITT && +#else + parity != PARITY_CRC32_PR1_CCITT && +#endif + parity != PARITY_CRC16_PR1_CCITT) + return -EINVAL; + + dev_to_port(dev)->encoding = encoding; + dev_to_port(dev)->parity = parity; + return 0; +} + + + +#ifdef DEBUG_RINGS +static void sca_dump_rings(struct net_device *dev) +{ + port_t *port = dev_to_port(dev); + card_t *card = port_to_card(port); + u16 cnt; +#if !defined(PAGE0_ALWAYS_MAPPED) && !defined(ALL_PAGES_ALWAYS_MAPPED) + u8 page; +#endif + +#if !defined(PAGE0_ALWAYS_MAPPED) && !defined(ALL_PAGES_ALWAYS_MAPPED) + page = sca_get_page(card); + openwin(card, 0); +#endif + + printk(KERN_DEBUG "RX ring: CDA=%u EDA=%u DSR=%02X in=%u %sactive", + sca_ina(get_dmac_rx(port) + CDAL, card), + sca_ina(get_dmac_rx(port) + EDAL, card), + sca_in(DSR_RX(phy_node(port)), card), port->rxin, + sca_in(DSR_RX(phy_node(port)), card) & DSR_DE?"":"in"); + for (cnt = 0; cnt < port_to_card(port)->rx_ring_buffers; cnt++) + printk(" %02X", readb(&(desc_address(port, cnt, 0)->stat))); + + printk("\n" KERN_DEBUG "TX ring: CDA=%u EDA=%u DSR=%02X in=%u " + "last=%u %sactive", + sca_ina(get_dmac_tx(port) + CDAL, card), + sca_ina(get_dmac_tx(port) + EDAL, card), + sca_in(DSR_TX(phy_node(port)), card), port->txin, port->txlast, + sca_in(DSR_TX(phy_node(port)), card) & DSR_DE ? "" : "in"); + + for (cnt = 0; cnt < port_to_card(port)->tx_ring_buffers; cnt++) + printk(" %02X", readb(&(desc_address(port, cnt, 1)->stat))); + printk("\n"); + + printk(KERN_DEBUG "MSCI: MD: %02x %02x %02x, " + "ST: %02x %02x %02x %02x" +#ifdef __HD64572_H + " %02x" +#endif + ", FST: %02x CST: %02x %02x\n", + sca_in(get_msci(port) + MD0, card), + sca_in(get_msci(port) + MD1, card), + sca_in(get_msci(port) + MD2, card), + sca_in(get_msci(port) + ST0, card), + sca_in(get_msci(port) + ST1, card), + sca_in(get_msci(port) + ST2, card), + sca_in(get_msci(port) + ST3, card), +#ifdef __HD64572_H + sca_in(get_msci(port) + ST4, card), +#endif + sca_in(get_msci(port) + FST, card), + sca_in(get_msci(port) + CST0, card), + sca_in(get_msci(port) + CST1, card)); + +#ifdef __HD64572_H + printk(KERN_DEBUG "ILAR: %02x ISR: %08x %08x\n", sca_in(ILAR, card), + sca_inl(ISR0, card), sca_inl(ISR1, card)); +#else + printk(KERN_DEBUG "ISR: %02x %02x %02x\n", sca_in(ISR0, card), + sca_in(ISR1, card), sca_in(ISR2, card)); +#endif + +#if !defined(PAGE0_ALWAYS_MAPPED) && !defined(ALL_PAGES_ALWAYS_MAPPED) + openwin(card, page); /* Restore original page */ +#endif +} +#endif /* DEBUG_RINGS */ + + + +static int sca_xmit(struct sk_buff *skb, struct net_device *dev) +{ + port_t *port = dev_to_port(dev); + card_t *card = port_to_card(port); + pkt_desc __iomem *desc; + u32 buff, len; +#ifndef ALL_PAGES_ALWAYS_MAPPED + u8 page; + u32 maxlen; +#endif + + spin_lock_irq(&port->lock); + + desc = desc_address(port, port->txin + 1, 1); + if (readb(&desc->stat)) { /* allow 1 packet gap */ + /* should never happen - previous xmit should stop queue */ +#ifdef DEBUG_PKT + printk(KERN_DEBUG "%s: transmitter buffer full\n", dev->name); +#endif + netif_stop_queue(dev); + spin_unlock_irq(&port->lock); + return 1; /* request packet to be queued */ + } + +#ifdef DEBUG_PKT + printk(KERN_DEBUG "%s TX(%i):", dev->name, skb->len); + debug_frame(skb); +#endif + + desc = desc_address(port, port->txin, 1); + buff = buffer_offset(port, port->txin, 1); + len = skb->len; +#ifndef ALL_PAGES_ALWAYS_MAPPED + page = buff / winsize(card); + buff = buff % winsize(card); + maxlen = winsize(card) - buff; + + openwin(card, page); + if (len > maxlen) { + memcpy_toio(winbase(card) + buff, skb->data, maxlen); + openwin(card, page + 1); + memcpy_toio(winbase(card), skb->data + maxlen, len - maxlen); + } + else +#endif + memcpy_toio(winbase(card) + buff, skb->data, len); + +#if !defined(PAGE0_ALWAYS_MAPPED) && !defined(ALL_PAGES_ALWAYS_MAPPED) + openwin(card, 0); /* select pkt_desc table page back */ +#endif + writew(len, &desc->len); + writeb(ST_TX_EOM, &desc->stat); + dev->trans_start = jiffies; + + port->txin = next_desc(port, port->txin, 1); + sca_outa(desc_offset(port, port->txin, 1), + get_dmac_tx(port) + EDAL, card); + + sca_out(DSR_DE, DSR_TX(phy_node(port)), card); /* Enable TX DMA */ + + desc = desc_address(port, port->txin + 1, 1); + if (readb(&desc->stat)) /* allow 1 packet gap */ + netif_stop_queue(dev); + + spin_unlock_irq(&port->lock); + + dev_kfree_skb(skb); + return 0; +} + + + +#ifdef NEED_DETECT_RAM +static u32 __devinit sca_detect_ram(card_t *card, u8 __iomem *rambase, u32 ramsize) +{ + /* Round RAM size to 32 bits, fill from end to start */ + u32 i = ramsize &= ~3; + +#ifndef ALL_PAGES_ALWAYS_MAPPED + u32 size = winsize(card); + + openwin(card, (i - 4) / size); /* select last window */ +#endif + do { + i -= 4; +#ifndef ALL_PAGES_ALWAYS_MAPPED + if ((i + 4) % size == 0) + openwin(card, i / size); + writel(i ^ 0x12345678, rambase + i % size); +#else + writel(i ^ 0x12345678, rambase + i); +#endif + }while (i > 0); + + for (i = 0; i < ramsize ; i += 4) { +#ifndef ALL_PAGES_ALWAYS_MAPPED + if (i % size == 0) + openwin(card, i / size); + + if (readl(rambase + i % size) != (i ^ 0x12345678)) + break; +#else + if (readl(rambase + i) != (i ^ 0x12345678)) + break; +#endif + } + + return i; +} +#endif /* NEED_DETECT_RAM */ + + + +static void __devinit sca_init(card_t *card, int wait_states) +{ + sca_out(wait_states, WCRL, card); /* Wait Control */ + sca_out(wait_states, WCRM, card); + sca_out(wait_states, WCRH, card); + + sca_out(0, DMER, card); /* DMA Master disable */ + sca_out(0x03, PCR, card); /* DMA priority */ + sca_out(0, DSR_RX(0), card); /* DMA disable - to halt state */ + sca_out(0, DSR_TX(0), card); + sca_out(0, DSR_RX(1), card); + sca_out(0, DSR_TX(1), card); + sca_out(DMER_DME, DMER, card); /* DMA Master enable */ +} diff --git a/drivers/net/wan/hd64572.c b/drivers/net/wan/hd64572.c new file mode 100644 index 00000000000..434583a94b3 --- /dev/null +++ b/drivers/net/wan/hd64572.c @@ -0,0 +1,867 @@ +/* + * Hitachi SCA HD64570 and HD64572 common driver for Linux + * + * Copyright (C) 1998-2003 Krzysztof Halasa + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of version 2 of the GNU General Public License + * as published by the Free Software Foundation. + * + * Sources of information: + * Hitachi HD64570 SCA User's Manual + * Hitachi HD64572 SCA-II User's Manual + * + * We use the following SCA memory map: + * + * Packet buffer descriptor rings - starting from winbase or win0base: + * rx_ring_buffers * sizeof(pkt_desc) = logical channel #0 RX ring + * tx_ring_buffers * sizeof(pkt_desc) = logical channel #0 TX ring + * rx_ring_buffers * sizeof(pkt_desc) = logical channel #1 RX ring (if used) + * tx_ring_buffers * sizeof(pkt_desc) = logical channel #1 TX ring (if used) + * + * Packet data buffers - starting from winbase + buff_offset: + * rx_ring_buffers * HDLC_MAX_MRU = logical channel #0 RX buffers + * tx_ring_buffers * HDLC_MAX_MRU = logical channel #0 TX buffers + * rx_ring_buffers * HDLC_MAX_MRU = logical channel #0 RX buffers (if used) + * tx_ring_buffers * HDLC_MAX_MRU = logical channel #0 TX buffers (if used) + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include + +#include +#include + +#include + +#if (!defined (__HD64570_H) && !defined (__HD64572_H)) || \ + (defined (__HD64570_H) && defined (__HD64572_H)) +#error Either hd64570.h or hd64572.h must be included +#endif + +#define get_msci(port) (phy_node(port) ? MSCI1_OFFSET : MSCI0_OFFSET) +#define get_dmac_rx(port) (phy_node(port) ? DMAC1RX_OFFSET : DMAC0RX_OFFSET) +#define get_dmac_tx(port) (phy_node(port) ? DMAC1TX_OFFSET : DMAC0TX_OFFSET) + +#define SCA_INTR_MSCI(node) (node ? 0x10 : 0x01) +#define SCA_INTR_DMAC_RX(node) (node ? 0x20 : 0x02) +#define SCA_INTR_DMAC_TX(node) (node ? 0x40 : 0x04) + +#ifdef __HD64570_H /* HD64570 */ +#define sca_outa(value, reg, card) sca_outw(value, reg, card) +#define sca_ina(reg, card) sca_inw(reg, card) +#define writea(value, ptr) writew(value, ptr) + +#else /* HD64572 */ +#define sca_outa(value, reg, card) sca_outl(value, reg, card) +#define sca_ina(reg, card) sca_inl(reg, card) +#define writea(value, ptr) writel(value, ptr) +#endif + +static inline struct net_device *port_to_dev(port_t *port) +{ + return port->dev; +} + +static inline int sca_intr_status(card_t *card) +{ + u8 result = 0; + +#ifdef __HD64570_H /* HD64570 */ + u8 isr0 = sca_in(ISR0, card); + u8 isr1 = sca_in(ISR1, card); + + if (isr1 & 0x03) result |= SCA_INTR_DMAC_RX(0); + if (isr1 & 0x0C) result |= SCA_INTR_DMAC_TX(0); + if (isr1 & 0x30) result |= SCA_INTR_DMAC_RX(1); + if (isr1 & 0xC0) result |= SCA_INTR_DMAC_TX(1); + if (isr0 & 0x0F) result |= SCA_INTR_MSCI(0); + if (isr0 & 0xF0) result |= SCA_INTR_MSCI(1); + +#else /* HD64572 */ + u32 isr0 = sca_inl(ISR0, card); + + if (isr0 & 0x0000000F) result |= SCA_INTR_DMAC_RX(0); + if (isr0 & 0x000000F0) result |= SCA_INTR_DMAC_TX(0); + if (isr0 & 0x00000F00) result |= SCA_INTR_DMAC_RX(1); + if (isr0 & 0x0000F000) result |= SCA_INTR_DMAC_TX(1); + if (isr0 & 0x003E0000) result |= SCA_INTR_MSCI(0); + if (isr0 & 0x3E000000) result |= SCA_INTR_MSCI(1); + +#endif /* HD64570 vs HD64572 */ + + if (!(result & SCA_INTR_DMAC_TX(0))) + if (sca_in(DSR_TX(0), card) & DSR_EOM) + result |= SCA_INTR_DMAC_TX(0); + if (!(result & SCA_INTR_DMAC_TX(1))) + if (sca_in(DSR_TX(1), card) & DSR_EOM) + result |= SCA_INTR_DMAC_TX(1); + + return result; +} + +static inline port_t* dev_to_port(struct net_device *dev) +{ + return dev_to_hdlc(dev)->priv; +} + +static inline u16 next_desc(port_t *port, u16 desc, int transmit) +{ + return (desc + 1) % (transmit ? port_to_card(port)->tx_ring_buffers + : port_to_card(port)->rx_ring_buffers); +} + + + +static inline u16 desc_abs_number(port_t *port, u16 desc, int transmit) +{ + u16 rx_buffs = port_to_card(port)->rx_ring_buffers; + u16 tx_buffs = port_to_card(port)->tx_ring_buffers; + + desc %= (transmit ? tx_buffs : rx_buffs); // called with "X + 1" etc. + return log_node(port) * (rx_buffs + tx_buffs) + + transmit * rx_buffs + desc; +} + + + +static inline u16 desc_offset(port_t *port, u16 desc, int transmit) +{ + /* Descriptor offset always fits in 16 bytes */ + return desc_abs_number(port, desc, transmit) * sizeof(pkt_desc); +} + + + +static inline pkt_desc __iomem *desc_address(port_t *port, u16 desc, int transmit) +{ +#ifdef PAGE0_ALWAYS_MAPPED + return (pkt_desc __iomem *)(win0base(port_to_card(port)) + + desc_offset(port, desc, transmit)); +#else + return (pkt_desc __iomem *)(winbase(port_to_card(port)) + + desc_offset(port, desc, transmit)); +#endif +} + + + +static inline u32 buffer_offset(port_t *port, u16 desc, int transmit) +{ + return port_to_card(port)->buff_offset + + desc_abs_number(port, desc, transmit) * (u32)HDLC_MAX_MRU; +} + + +static inline void sca_set_carrier(port_t *port) +{ + if (!(sca_in(get_msci(port) + ST3, port_to_card(port)) & ST3_DCD)) { +#ifdef DEBUG_LINK + printk(KERN_DEBUG "%s: sca_set_carrier on\n", + port_to_dev(port)->name); +#endif + netif_carrier_on(port_to_dev(port)); + } else { +#ifdef DEBUG_LINK + printk(KERN_DEBUG "%s: sca_set_carrier off\n", + port_to_dev(port)->name); +#endif + netif_carrier_off(port_to_dev(port)); + } +} + + +static void sca_init_sync_port(port_t *port) +{ + card_t *card = port_to_card(port); + int transmit, i; + + port->rxin = 0; + port->txin = 0; + port->txlast = 0; + +#if !defined(PAGE0_ALWAYS_MAPPED) && !defined(ALL_PAGES_ALWAYS_MAPPED) + openwin(card, 0); +#endif + + for (transmit = 0; transmit < 2; transmit++) { + u16 dmac = transmit ? get_dmac_tx(port) : get_dmac_rx(port); + u16 buffs = transmit ? card->tx_ring_buffers + : card->rx_ring_buffers; + + for (i = 0; i < buffs; i++) { + pkt_desc __iomem *desc = desc_address(port, i, transmit); + u16 chain_off = desc_offset(port, i + 1, transmit); + u32 buff_off = buffer_offset(port, i, transmit); + + writea(chain_off, &desc->cp); + writel(buff_off, &desc->bp); + writew(0, &desc->len); + writeb(0, &desc->stat); + } + + /* DMA disable - to halt state */ + sca_out(0, transmit ? DSR_TX(phy_node(port)) : + DSR_RX(phy_node(port)), card); + /* software ABORT - to initial state */ + sca_out(DCR_ABORT, transmit ? DCR_TX(phy_node(port)) : + DCR_RX(phy_node(port)), card); + +#ifdef __HD64570_H + sca_out(0, dmac + CPB, card); /* pointer base */ +#endif + /* current desc addr */ + sca_outa(desc_offset(port, 0, transmit), dmac + CDAL, card); + if (!transmit) + sca_outa(desc_offset(port, buffs - 1, transmit), + dmac + EDAL, card); + else + sca_outa(desc_offset(port, 0, transmit), dmac + EDAL, + card); + + /* clear frame end interrupt counter */ + sca_out(DCR_CLEAR_EOF, transmit ? DCR_TX(phy_node(port)) : + DCR_RX(phy_node(port)), card); + + if (!transmit) { /* Receive */ + /* set buffer length */ + sca_outw(HDLC_MAX_MRU, dmac + BFLL, card); + /* Chain mode, Multi-frame */ + sca_out(0x14, DMR_RX(phy_node(port)), card); + sca_out(DIR_EOME | DIR_BOFE, DIR_RX(phy_node(port)), + card); + /* DMA enable */ + sca_out(DSR_DE, DSR_RX(phy_node(port)), card); + } else { /* Transmit */ + /* Chain mode, Multi-frame */ + sca_out(0x14, DMR_TX(phy_node(port)), card); + /* enable underflow interrupts */ + sca_out(DIR_BOFE, DIR_TX(phy_node(port)), card); + } + } + sca_set_carrier(port); +} + + + +#ifdef NEED_SCA_MSCI_INTR +/* MSCI interrupt service */ +static inline void sca_msci_intr(port_t *port) +{ + u16 msci = get_msci(port); + card_t* card = port_to_card(port); + u8 stat = sca_in(msci + ST1, card); /* read MSCI ST1 status */ + + /* Reset MSCI TX underrun and CDCD status bit */ + sca_out(stat & (ST1_UDRN | ST1_CDCD), msci + ST1, card); + + if (stat & ST1_UDRN) { + /* TX Underrun error detected */ + port_to_dev(port)->stats.tx_errors++; + port_to_dev(port)->stats.tx_fifo_errors++; + } + + if (stat & ST1_CDCD) + sca_set_carrier(port); +} +#endif + + + +static inline void sca_rx(card_t *card, port_t *port, pkt_desc __iomem *desc, u16 rxin) +{ + struct net_device *dev = port_to_dev(port); + struct sk_buff *skb; + u16 len; + u32 buff; +#ifndef ALL_PAGES_ALWAYS_MAPPED + u32 maxlen; + u8 page; +#endif + + len = readw(&desc->len); + skb = dev_alloc_skb(len); + if (!skb) { + dev->stats.rx_dropped++; + return; + } + + buff = buffer_offset(port, rxin, 0); +#ifndef ALL_PAGES_ALWAYS_MAPPED + page = buff / winsize(card); + buff = buff % winsize(card); + maxlen = winsize(card) - buff; + + openwin(card, page); + + if (len > maxlen) { + memcpy_fromio(skb->data, winbase(card) + buff, maxlen); + openwin(card, page + 1); + memcpy_fromio(skb->data + maxlen, winbase(card), len - maxlen); + } else +#endif + memcpy_fromio(skb->data, winbase(card) + buff, len); + +#if !defined(PAGE0_ALWAYS_MAPPED) && !defined(ALL_PAGES_ALWAYS_MAPPED) + /* select pkt_desc table page back */ + openwin(card, 0); +#endif + skb_put(skb, len); +#ifdef DEBUG_PKT + printk(KERN_DEBUG "%s RX(%i):", dev->name, skb->len); + debug_frame(skb); +#endif + dev->stats.rx_packets++; + dev->stats.rx_bytes += skb->len; + skb->protocol = hdlc_type_trans(skb, dev); + netif_rx(skb); +} + + + +/* Receive DMA interrupt service */ +static inline void sca_rx_intr(port_t *port) +{ + struct net_device *dev = port_to_dev(port); + u16 dmac = get_dmac_rx(port); + card_t *card = port_to_card(port); + u8 stat = sca_in(DSR_RX(phy_node(port)), card); /* read DMA Status */ + + /* Reset DSR status bits */ + sca_out((stat & (DSR_EOT | DSR_EOM | DSR_BOF | DSR_COF)) | DSR_DWE, + DSR_RX(phy_node(port)), card); + + if (stat & DSR_BOF) + /* Dropped one or more frames */ + dev->stats.rx_over_errors++; + + while (1) { + u32 desc_off = desc_offset(port, port->rxin, 0); + pkt_desc __iomem *desc; + u32 cda = sca_ina(dmac + CDAL, card); + + if ((cda >= desc_off) && (cda < desc_off + sizeof(pkt_desc))) + break; /* No frame received */ + + desc = desc_address(port, port->rxin, 0); + stat = readb(&desc->stat); + if (!(stat & ST_RX_EOM)) + port->rxpart = 1; /* partial frame received */ + else if ((stat & ST_ERROR_MASK) || port->rxpart) { + dev->stats.rx_errors++; + if (stat & ST_RX_OVERRUN) + dev->stats.rx_fifo_errors++; + else if ((stat & (ST_RX_SHORT | ST_RX_ABORT | + ST_RX_RESBIT)) || port->rxpart) + dev->stats.rx_frame_errors++; + else if (stat & ST_RX_CRC) + dev->stats.rx_crc_errors++; + if (stat & ST_RX_EOM) + port->rxpart = 0; /* received last fragment */ + } else + sca_rx(card, port, desc, port->rxin); + + /* Set new error descriptor address */ + sca_outa(desc_off, dmac + EDAL, card); + port->rxin = next_desc(port, port->rxin, 0); + } + + /* make sure RX DMA is enabled */ + sca_out(DSR_DE, DSR_RX(phy_node(port)), card); +} + + + +/* Transmit DMA interrupt service */ +static inline void sca_tx_intr(port_t *port) +{ + struct net_device *dev = port_to_dev(port); + u16 dmac = get_dmac_tx(port); + card_t* card = port_to_card(port); + u8 stat; + + spin_lock(&port->lock); + + stat = sca_in(DSR_TX(phy_node(port)), card); /* read DMA Status */ + + /* Reset DSR status bits */ + sca_out((stat & (DSR_EOT | DSR_EOM | DSR_BOF | DSR_COF)) | DSR_DWE, + DSR_TX(phy_node(port)), card); + + while (1) { + pkt_desc __iomem *desc; + + u32 desc_off = desc_offset(port, port->txlast, 1); + u32 cda = sca_ina(dmac + CDAL, card); + if ((cda >= desc_off) && (cda < desc_off + sizeof(pkt_desc))) + break; /* Transmitter is/will_be sending this frame */ + + desc = desc_address(port, port->txlast, 1); + dev->stats.tx_packets++; + dev->stats.tx_bytes += readw(&desc->len); + writeb(0, &desc->stat); /* Free descriptor */ + port->txlast = next_desc(port, port->txlast, 1); + } + + netif_wake_queue(dev); + spin_unlock(&port->lock); +} + + + +static irqreturn_t sca_intr(int irq, void* dev_id) +{ + card_t *card = dev_id; + int i; + u8 stat; + int handled = 0; + +#ifndef ALL_PAGES_ALWAYS_MAPPED + u8 page = sca_get_page(card); +#endif + + while((stat = sca_intr_status(card)) != 0) { + handled = 1; + for (i = 0; i < 2; i++) { + port_t *port = get_port(card, i); + if (port) { + if (stat & SCA_INTR_MSCI(i)) + sca_msci_intr(port); + + if (stat & SCA_INTR_DMAC_RX(i)) + sca_rx_intr(port); + + if (stat & SCA_INTR_DMAC_TX(i)) + sca_tx_intr(port); + } + } + } + +#ifndef ALL_PAGES_ALWAYS_MAPPED + openwin(card, page); /* Restore original page */ +#endif + return IRQ_RETVAL(handled); +} + + + +static void sca_set_port(port_t *port) +{ + card_t* card = port_to_card(port); + u16 msci = get_msci(port); + u8 md2 = sca_in(msci + MD2, card); + unsigned int tmc, br = 10, brv = 1024; + + + if (port->settings.clock_rate > 0) { + /* Try lower br for better accuracy*/ + do { + br--; + brv >>= 1; /* brv = 2^9 = 512 max in specs */ + + /* Baud Rate = CLOCK_BASE / TMC / 2^BR */ + tmc = CLOCK_BASE / brv / port->settings.clock_rate; + }while (br > 1 && tmc <= 128); + + if (tmc < 1) { + tmc = 1; + br = 0; /* For baud=CLOCK_BASE we use tmc=1 br=0 */ + brv = 1; + } else if (tmc > 255) + tmc = 256; /* tmc=0 means 256 - low baud rates */ + + port->settings.clock_rate = CLOCK_BASE / brv / tmc; + } else { + br = 9; /* Minimum clock rate */ + tmc = 256; /* 8bit = 0 */ + port->settings.clock_rate = CLOCK_BASE / (256 * 512); + } + + port->rxs = (port->rxs & ~CLK_BRG_MASK) | br; + port->txs = (port->txs & ~CLK_BRG_MASK) | br; + port->tmc = tmc; + + /* baud divisor - time constant*/ +#ifdef __HD64570_H + sca_out(port->tmc, msci + TMC, card); +#else + sca_out(port->tmc, msci + TMCR, card); + sca_out(port->tmc, msci + TMCT, card); +#endif + + /* Set BRG bits */ + sca_out(port->rxs, msci + RXS, card); + sca_out(port->txs, msci + TXS, card); + + if (port->settings.loopback) + md2 |= MD2_LOOPBACK; + else + md2 &= ~MD2_LOOPBACK; + + sca_out(md2, msci + MD2, card); + +} + + + +static void sca_open(struct net_device *dev) +{ + port_t *port = dev_to_port(dev); + card_t* card = port_to_card(port); + u16 msci = get_msci(port); + u8 md0, md2; + + switch(port->encoding) { + case ENCODING_NRZ: md2 = MD2_NRZ; break; + case ENCODING_NRZI: md2 = MD2_NRZI; break; + case ENCODING_FM_MARK: md2 = MD2_FM_MARK; break; + case ENCODING_FM_SPACE: md2 = MD2_FM_SPACE; break; + default: md2 = MD2_MANCHESTER; + } + + if (port->settings.loopback) + md2 |= MD2_LOOPBACK; + + switch(port->parity) { + case PARITY_CRC16_PR0: md0 = MD0_HDLC | MD0_CRC_16_0; break; + case PARITY_CRC16_PR1: md0 = MD0_HDLC | MD0_CRC_16; break; +#ifdef __HD64570_H + case PARITY_CRC16_PR0_CCITT: md0 = MD0_HDLC | MD0_CRC_ITU_0; break; +#else + case PARITY_CRC32_PR1_CCITT: md0 = MD0_HDLC | MD0_CRC_ITU32; break; +#endif + case PARITY_CRC16_PR1_CCITT: md0 = MD0_HDLC | MD0_CRC_ITU; break; + default: md0 = MD0_HDLC | MD0_CRC_NONE; + } + + sca_out(CMD_RESET, msci + CMD, card); + sca_out(md0, msci + MD0, card); + sca_out(0x00, msci + MD1, card); /* no address field check */ + sca_out(md2, msci + MD2, card); + sca_out(0x7E, msci + IDL, card); /* flag character 0x7E */ +#ifdef __HD64570_H + sca_out(CTL_IDLE, msci + CTL, card); +#else + /* Skip the rest of underrun frame */ + sca_out(CTL_IDLE | CTL_URCT | CTL_URSKP, msci + CTL, card); +#endif + +#ifdef __HD64570_H + /* Allow at least 8 bytes before requesting RX DMA operation */ + /* TX with higher priority and possibly with shorter transfers */ + sca_out(0x07, msci + RRC, card); /* +1=RXRDY/DMA activation condition*/ + sca_out(0x10, msci + TRC0, card); /* = TXRDY/DMA activation condition*/ + sca_out(0x14, msci + TRC1, card); /* +1=TXRDY/DMA deactiv condition */ +#else + sca_out(0x0F, msci + RNR, card); /* +1=RX DMA activation condition */ + sca_out(0x3C, msci + TFS, card); /* +1 = TX start */ + sca_out(0x38, msci + TCR, card); /* =Critical TX DMA activ condition */ + sca_out(0x38, msci + TNR0, card); /* =TX DMA activation condition */ + sca_out(0x3F, msci + TNR1, card); /* +1=TX DMA deactivation condition*/ +#endif + +/* We're using the following interrupts: + - TXINT (DMAC completed all transmisions, underrun or DCD change) + - all DMA interrupts +*/ + + sca_set_carrier(port); + +#ifdef __HD64570_H + /* MSCI TX INT and RX INT A IRQ enable */ + sca_out(IE0_TXINT | IE0_RXINTA, msci + IE0, card); + sca_out(IE1_UDRN | IE1_CDCD, msci + IE1, card); + sca_out(sca_in(IER0, card) | (phy_node(port) ? 0xC0 : 0x0C), + IER0, card); /* TXINT and RXINT */ + /* enable DMA IRQ */ + sca_out(sca_in(IER1, card) | (phy_node(port) ? 0xF0 : 0x0F), + IER1, card); +#else + /* MSCI TXINT and RXINTA interrupt enable */ + sca_outl(IE0_TXINT | IE0_RXINTA | IE0_UDRN | IE0_CDCD, msci + IE0, + card); + /* DMA & MSCI IRQ enable */ + sca_outl(sca_inl(IER0, card) | + (phy_node(port) ? 0x0A006600 : 0x000A0066), IER0, card); +#endif + +#ifdef __HD64570_H + sca_out(port->tmc, msci + TMC, card); /* Restore registers */ +#else + sca_out(port->tmc, msci + TMCR, card); + sca_out(port->tmc, msci + TMCT, card); +#endif + sca_out(port->rxs, msci + RXS, card); + sca_out(port->txs, msci + TXS, card); + sca_out(CMD_TX_ENABLE, msci + CMD, card); + sca_out(CMD_RX_ENABLE, msci + CMD, card); + + netif_start_queue(dev); +} + + + +static void sca_close(struct net_device *dev) +{ + port_t *port = dev_to_port(dev); + card_t* card = port_to_card(port); + + /* reset channel */ + sca_out(CMD_RESET, get_msci(port) + CMD, port_to_card(port)); +#ifdef __HD64570_H + /* disable MSCI interrupts */ + sca_out(sca_in(IER0, card) & (phy_node(port) ? 0x0F : 0xF0), + IER0, card); + /* disable DMA interrupts */ + sca_out(sca_in(IER1, card) & (phy_node(port) ? 0x0F : 0xF0), + IER1, card); +#else + /* disable DMA & MSCI IRQ */ + sca_outl(sca_inl(IER0, card) & + (phy_node(port) ? 0x00FF00FF : 0xFF00FF00), IER0, card); +#endif + netif_stop_queue(dev); +} + + + +static int sca_attach(struct net_device *dev, unsigned short encoding, + unsigned short parity) +{ + if (encoding != ENCODING_NRZ && + encoding != ENCODING_NRZI && + encoding != ENCODING_FM_MARK && + encoding != ENCODING_FM_SPACE && + encoding != ENCODING_MANCHESTER) + return -EINVAL; + + if (parity != PARITY_NONE && + parity != PARITY_CRC16_PR0 && + parity != PARITY_CRC16_PR1 && +#ifdef __HD64570_H + parity != PARITY_CRC16_PR0_CCITT && +#else + parity != PARITY_CRC32_PR1_CCITT && +#endif + parity != PARITY_CRC16_PR1_CCITT) + return -EINVAL; + + dev_to_port(dev)->encoding = encoding; + dev_to_port(dev)->parity = parity; + return 0; +} + + + +#ifdef DEBUG_RINGS +static void sca_dump_rings(struct net_device *dev) +{ + port_t *port = dev_to_port(dev); + card_t *card = port_to_card(port); + u16 cnt; +#if !defined(PAGE0_ALWAYS_MAPPED) && !defined(ALL_PAGES_ALWAYS_MAPPED) + u8 page; +#endif + +#if !defined(PAGE0_ALWAYS_MAPPED) && !defined(ALL_PAGES_ALWAYS_MAPPED) + page = sca_get_page(card); + openwin(card, 0); +#endif + + printk(KERN_DEBUG "RX ring: CDA=%u EDA=%u DSR=%02X in=%u %sactive", + sca_ina(get_dmac_rx(port) + CDAL, card), + sca_ina(get_dmac_rx(port) + EDAL, card), + sca_in(DSR_RX(phy_node(port)), card), port->rxin, + sca_in(DSR_RX(phy_node(port)), card) & DSR_DE?"":"in"); + for (cnt = 0; cnt < port_to_card(port)->rx_ring_buffers; cnt++) + printk(" %02X", readb(&(desc_address(port, cnt, 0)->stat))); + + printk("\n" KERN_DEBUG "TX ring: CDA=%u EDA=%u DSR=%02X in=%u " + "last=%u %sactive", + sca_ina(get_dmac_tx(port) + CDAL, card), + sca_ina(get_dmac_tx(port) + EDAL, card), + sca_in(DSR_TX(phy_node(port)), card), port->txin, port->txlast, + sca_in(DSR_TX(phy_node(port)), card) & DSR_DE ? "" : "in"); + + for (cnt = 0; cnt < port_to_card(port)->tx_ring_buffers; cnt++) + printk(" %02X", readb(&(desc_address(port, cnt, 1)->stat))); + printk("\n"); + + printk(KERN_DEBUG "MSCI: MD: %02x %02x %02x, " + "ST: %02x %02x %02x %02x" +#ifdef __HD64572_H + " %02x" +#endif + ", FST: %02x CST: %02x %02x\n", + sca_in(get_msci(port) + MD0, card), + sca_in(get_msci(port) + MD1, card), + sca_in(get_msci(port) + MD2, card), + sca_in(get_msci(port) + ST0, card), + sca_in(get_msci(port) + ST1, card), + sca_in(get_msci(port) + ST2, card), + sca_in(get_msci(port) + ST3, card), +#ifdef __HD64572_H + sca_in(get_msci(port) + ST4, card), +#endif + sca_in(get_msci(port) + FST, card), + sca_in(get_msci(port) + CST0, card), + sca_in(get_msci(port) + CST1, card)); + +#ifdef __HD64572_H + printk(KERN_DEBUG "ILAR: %02x ISR: %08x %08x\n", sca_in(ILAR, card), + sca_inl(ISR0, card), sca_inl(ISR1, card)); +#else + printk(KERN_DEBUG "ISR: %02x %02x %02x\n", sca_in(ISR0, card), + sca_in(ISR1, card), sca_in(ISR2, card)); +#endif + +#if !defined(PAGE0_ALWAYS_MAPPED) && !defined(ALL_PAGES_ALWAYS_MAPPED) + openwin(card, page); /* Restore original page */ +#endif +} +#endif /* DEBUG_RINGS */ + + + +static int sca_xmit(struct sk_buff *skb, struct net_device *dev) +{ + port_t *port = dev_to_port(dev); + card_t *card = port_to_card(port); + pkt_desc __iomem *desc; + u32 buff, len; +#ifndef ALL_PAGES_ALWAYS_MAPPED + u8 page; + u32 maxlen; +#endif + + spin_lock_irq(&port->lock); + + desc = desc_address(port, port->txin + 1, 1); + if (readb(&desc->stat)) { /* allow 1 packet gap */ + /* should never happen - previous xmit should stop queue */ +#ifdef DEBUG_PKT + printk(KERN_DEBUG "%s: transmitter buffer full\n", dev->name); +#endif + netif_stop_queue(dev); + spin_unlock_irq(&port->lock); + return 1; /* request packet to be queued */ + } + +#ifdef DEBUG_PKT + printk(KERN_DEBUG "%s TX(%i):", dev->name, skb->len); + debug_frame(skb); +#endif + + desc = desc_address(port, port->txin, 1); + buff = buffer_offset(port, port->txin, 1); + len = skb->len; +#ifndef ALL_PAGES_ALWAYS_MAPPED + page = buff / winsize(card); + buff = buff % winsize(card); + maxlen = winsize(card) - buff; + + openwin(card, page); + if (len > maxlen) { + memcpy_toio(winbase(card) + buff, skb->data, maxlen); + openwin(card, page + 1); + memcpy_toio(winbase(card), skb->data + maxlen, len - maxlen); + } + else +#endif + memcpy_toio(winbase(card) + buff, skb->data, len); + +#if !defined(PAGE0_ALWAYS_MAPPED) && !defined(ALL_PAGES_ALWAYS_MAPPED) + openwin(card, 0); /* select pkt_desc table page back */ +#endif + writew(len, &desc->len); + writeb(ST_TX_EOM, &desc->stat); + dev->trans_start = jiffies; + + port->txin = next_desc(port, port->txin, 1); + sca_outa(desc_offset(port, port->txin, 1), + get_dmac_tx(port) + EDAL, card); + + sca_out(DSR_DE, DSR_TX(phy_node(port)), card); /* Enable TX DMA */ + + desc = desc_address(port, port->txin + 1, 1); + if (readb(&desc->stat)) /* allow 1 packet gap */ + netif_stop_queue(dev); + + spin_unlock_irq(&port->lock); + + dev_kfree_skb(skb); + return 0; +} + + + +#ifdef NEED_DETECT_RAM +static u32 __devinit sca_detect_ram(card_t *card, u8 __iomem *rambase, u32 ramsize) +{ + /* Round RAM size to 32 bits, fill from end to start */ + u32 i = ramsize &= ~3; + +#ifndef ALL_PAGES_ALWAYS_MAPPED + u32 size = winsize(card); + + openwin(card, (i - 4) / size); /* select last window */ +#endif + do { + i -= 4; +#ifndef ALL_PAGES_ALWAYS_MAPPED + if ((i + 4) % size == 0) + openwin(card, i / size); + writel(i ^ 0x12345678, rambase + i % size); +#else + writel(i ^ 0x12345678, rambase + i); +#endif + }while (i > 0); + + for (i = 0; i < ramsize ; i += 4) { +#ifndef ALL_PAGES_ALWAYS_MAPPED + if (i % size == 0) + openwin(card, i / size); + + if (readl(rambase + i % size) != (i ^ 0x12345678)) + break; +#else + if (readl(rambase + i) != (i ^ 0x12345678)) + break; +#endif + } + + return i; +} +#endif /* NEED_DETECT_RAM */ + + + +static void __devinit sca_init(card_t *card, int wait_states) +{ + sca_out(wait_states, WCRL, card); /* Wait Control */ + sca_out(wait_states, WCRM, card); + sca_out(wait_states, WCRH, card); + + sca_out(0, DMER, card); /* DMA Master disable */ + sca_out(0x03, PCR, card); /* DMA priority */ + sca_out(0, DSR_RX(0), card); /* DMA disable - to halt state */ + sca_out(0, DSR_TX(0), card); + sca_out(0, DSR_RX(1), card); + sca_out(0, DSR_TX(1), card); + sca_out(DMER_DME, DMER, card); /* DMA Master enable */ +} diff --git a/drivers/net/wan/hd6457x.c b/drivers/net/wan/hd6457x.c deleted file mode 100644 index 434583a94b3..00000000000 --- a/drivers/net/wan/hd6457x.c +++ /dev/null @@ -1,867 +0,0 @@ -/* - * Hitachi SCA HD64570 and HD64572 common driver for Linux - * - * Copyright (C) 1998-2003 Krzysztof Halasa - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of version 2 of the GNU General Public License - * as published by the Free Software Foundation. - * - * Sources of information: - * Hitachi HD64570 SCA User's Manual - * Hitachi HD64572 SCA-II User's Manual - * - * We use the following SCA memory map: - * - * Packet buffer descriptor rings - starting from winbase or win0base: - * rx_ring_buffers * sizeof(pkt_desc) = logical channel #0 RX ring - * tx_ring_buffers * sizeof(pkt_desc) = logical channel #0 TX ring - * rx_ring_buffers * sizeof(pkt_desc) = logical channel #1 RX ring (if used) - * tx_ring_buffers * sizeof(pkt_desc) = logical channel #1 TX ring (if used) - * - * Packet data buffers - starting from winbase + buff_offset: - * rx_ring_buffers * HDLC_MAX_MRU = logical channel #0 RX buffers - * tx_ring_buffers * HDLC_MAX_MRU = logical channel #0 TX buffers - * rx_ring_buffers * HDLC_MAX_MRU = logical channel #0 RX buffers (if used) - * tx_ring_buffers * HDLC_MAX_MRU = logical channel #0 TX buffers (if used) - */ - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include -#include -#include - -#include -#include - -#include - -#if (!defined (__HD64570_H) && !defined (__HD64572_H)) || \ - (defined (__HD64570_H) && defined (__HD64572_H)) -#error Either hd64570.h or hd64572.h must be included -#endif - -#define get_msci(port) (phy_node(port) ? MSCI1_OFFSET : MSCI0_OFFSET) -#define get_dmac_rx(port) (phy_node(port) ? DMAC1RX_OFFSET : DMAC0RX_OFFSET) -#define get_dmac_tx(port) (phy_node(port) ? DMAC1TX_OFFSET : DMAC0TX_OFFSET) - -#define SCA_INTR_MSCI(node) (node ? 0x10 : 0x01) -#define SCA_INTR_DMAC_RX(node) (node ? 0x20 : 0x02) -#define SCA_INTR_DMAC_TX(node) (node ? 0x40 : 0x04) - -#ifdef __HD64570_H /* HD64570 */ -#define sca_outa(value, reg, card) sca_outw(value, reg, card) -#define sca_ina(reg, card) sca_inw(reg, card) -#define writea(value, ptr) writew(value, ptr) - -#else /* HD64572 */ -#define sca_outa(value, reg, card) sca_outl(value, reg, card) -#define sca_ina(reg, card) sca_inl(reg, card) -#define writea(value, ptr) writel(value, ptr) -#endif - -static inline struct net_device *port_to_dev(port_t *port) -{ - return port->dev; -} - -static inline int sca_intr_status(card_t *card) -{ - u8 result = 0; - -#ifdef __HD64570_H /* HD64570 */ - u8 isr0 = sca_in(ISR0, card); - u8 isr1 = sca_in(ISR1, card); - - if (isr1 & 0x03) result |= SCA_INTR_DMAC_RX(0); - if (isr1 & 0x0C) result |= SCA_INTR_DMAC_TX(0); - if (isr1 & 0x30) result |= SCA_INTR_DMAC_RX(1); - if (isr1 & 0xC0) result |= SCA_INTR_DMAC_TX(1); - if (isr0 & 0x0F) result |= SCA_INTR_MSCI(0); - if (isr0 & 0xF0) result |= SCA_INTR_MSCI(1); - -#else /* HD64572 */ - u32 isr0 = sca_inl(ISR0, card); - - if (isr0 & 0x0000000F) result |= SCA_INTR_DMAC_RX(0); - if (isr0 & 0x000000F0) result |= SCA_INTR_DMAC_TX(0); - if (isr0 & 0x00000F00) result |= SCA_INTR_DMAC_RX(1); - if (isr0 & 0x0000F000) result |= SCA_INTR_DMAC_TX(1); - if (isr0 & 0x003E0000) result |= SCA_INTR_MSCI(0); - if (isr0 & 0x3E000000) result |= SCA_INTR_MSCI(1); - -#endif /* HD64570 vs HD64572 */ - - if (!(result & SCA_INTR_DMAC_TX(0))) - if (sca_in(DSR_TX(0), card) & DSR_EOM) - result |= SCA_INTR_DMAC_TX(0); - if (!(result & SCA_INTR_DMAC_TX(1))) - if (sca_in(DSR_TX(1), card) & DSR_EOM) - result |= SCA_INTR_DMAC_TX(1); - - return result; -} - -static inline port_t* dev_to_port(struct net_device *dev) -{ - return dev_to_hdlc(dev)->priv; -} - -static inline u16 next_desc(port_t *port, u16 desc, int transmit) -{ - return (desc + 1) % (transmit ? port_to_card(port)->tx_ring_buffers - : port_to_card(port)->rx_ring_buffers); -} - - - -static inline u16 desc_abs_number(port_t *port, u16 desc, int transmit) -{ - u16 rx_buffs = port_to_card(port)->rx_ring_buffers; - u16 tx_buffs = port_to_card(port)->tx_ring_buffers; - - desc %= (transmit ? tx_buffs : rx_buffs); // called with "X + 1" etc. - return log_node(port) * (rx_buffs + tx_buffs) + - transmit * rx_buffs + desc; -} - - - -static inline u16 desc_offset(port_t *port, u16 desc, int transmit) -{ - /* Descriptor offset always fits in 16 bytes */ - return desc_abs_number(port, desc, transmit) * sizeof(pkt_desc); -} - - - -static inline pkt_desc __iomem *desc_address(port_t *port, u16 desc, int transmit) -{ -#ifdef PAGE0_ALWAYS_MAPPED - return (pkt_desc __iomem *)(win0base(port_to_card(port)) - + desc_offset(port, desc, transmit)); -#else - return (pkt_desc __iomem *)(winbase(port_to_card(port)) - + desc_offset(port, desc, transmit)); -#endif -} - - - -static inline u32 buffer_offset(port_t *port, u16 desc, int transmit) -{ - return port_to_card(port)->buff_offset + - desc_abs_number(port, desc, transmit) * (u32)HDLC_MAX_MRU; -} - - -static inline void sca_set_carrier(port_t *port) -{ - if (!(sca_in(get_msci(port) + ST3, port_to_card(port)) & ST3_DCD)) { -#ifdef DEBUG_LINK - printk(KERN_DEBUG "%s: sca_set_carrier on\n", - port_to_dev(port)->name); -#endif - netif_carrier_on(port_to_dev(port)); - } else { -#ifdef DEBUG_LINK - printk(KERN_DEBUG "%s: sca_set_carrier off\n", - port_to_dev(port)->name); -#endif - netif_carrier_off(port_to_dev(port)); - } -} - - -static void sca_init_sync_port(port_t *port) -{ - card_t *card = port_to_card(port); - int transmit, i; - - port->rxin = 0; - port->txin = 0; - port->txlast = 0; - -#if !defined(PAGE0_ALWAYS_MAPPED) && !defined(ALL_PAGES_ALWAYS_MAPPED) - openwin(card, 0); -#endif - - for (transmit = 0; transmit < 2; transmit++) { - u16 dmac = transmit ? get_dmac_tx(port) : get_dmac_rx(port); - u16 buffs = transmit ? card->tx_ring_buffers - : card->rx_ring_buffers; - - for (i = 0; i < buffs; i++) { - pkt_desc __iomem *desc = desc_address(port, i, transmit); - u16 chain_off = desc_offset(port, i + 1, transmit); - u32 buff_off = buffer_offset(port, i, transmit); - - writea(chain_off, &desc->cp); - writel(buff_off, &desc->bp); - writew(0, &desc->len); - writeb(0, &desc->stat); - } - - /* DMA disable - to halt state */ - sca_out(0, transmit ? DSR_TX(phy_node(port)) : - DSR_RX(phy_node(port)), card); - /* software ABORT - to initial state */ - sca_out(DCR_ABORT, transmit ? DCR_TX(phy_node(port)) : - DCR_RX(phy_node(port)), card); - -#ifdef __HD64570_H - sca_out(0, dmac + CPB, card); /* pointer base */ -#endif - /* current desc addr */ - sca_outa(desc_offset(port, 0, transmit), dmac + CDAL, card); - if (!transmit) - sca_outa(desc_offset(port, buffs - 1, transmit), - dmac + EDAL, card); - else - sca_outa(desc_offset(port, 0, transmit), dmac + EDAL, - card); - - /* clear frame end interrupt counter */ - sca_out(DCR_CLEAR_EOF, transmit ? DCR_TX(phy_node(port)) : - DCR_RX(phy_node(port)), card); - - if (!transmit) { /* Receive */ - /* set buffer length */ - sca_outw(HDLC_MAX_MRU, dmac + BFLL, card); - /* Chain mode, Multi-frame */ - sca_out(0x14, DMR_RX(phy_node(port)), card); - sca_out(DIR_EOME | DIR_BOFE, DIR_RX(phy_node(port)), - card); - /* DMA enable */ - sca_out(DSR_DE, DSR_RX(phy_node(port)), card); - } else { /* Transmit */ - /* Chain mode, Multi-frame */ - sca_out(0x14, DMR_TX(phy_node(port)), card); - /* enable underflow interrupts */ - sca_out(DIR_BOFE, DIR_TX(phy_node(port)), card); - } - } - sca_set_carrier(port); -} - - - -#ifdef NEED_SCA_MSCI_INTR -/* MSCI interrupt service */ -static inline void sca_msci_intr(port_t *port) -{ - u16 msci = get_msci(port); - card_t* card = port_to_card(port); - u8 stat = sca_in(msci + ST1, card); /* read MSCI ST1 status */ - - /* Reset MSCI TX underrun and CDCD status bit */ - sca_out(stat & (ST1_UDRN | ST1_CDCD), msci + ST1, card); - - if (stat & ST1_UDRN) { - /* TX Underrun error detected */ - port_to_dev(port)->stats.tx_errors++; - port_to_dev(port)->stats.tx_fifo_errors++; - } - - if (stat & ST1_CDCD) - sca_set_carrier(port); -} -#endif - - - -static inline void sca_rx(card_t *card, port_t *port, pkt_desc __iomem *desc, u16 rxin) -{ - struct net_device *dev = port_to_dev(port); - struct sk_buff *skb; - u16 len; - u32 buff; -#ifndef ALL_PAGES_ALWAYS_MAPPED - u32 maxlen; - u8 page; -#endif - - len = readw(&desc->len); - skb = dev_alloc_skb(len); - if (!skb) { - dev->stats.rx_dropped++; - return; - } - - buff = buffer_offset(port, rxin, 0); -#ifndef ALL_PAGES_ALWAYS_MAPPED - page = buff / winsize(card); - buff = buff % winsize(card); - maxlen = winsize(card) - buff; - - openwin(card, page); - - if (len > maxlen) { - memcpy_fromio(skb->data, winbase(card) + buff, maxlen); - openwin(card, page + 1); - memcpy_fromio(skb->data + maxlen, winbase(card), len - maxlen); - } else -#endif - memcpy_fromio(skb->data, winbase(card) + buff, len); - -#if !defined(PAGE0_ALWAYS_MAPPED) && !defined(ALL_PAGES_ALWAYS_MAPPED) - /* select pkt_desc table page back */ - openwin(card, 0); -#endif - skb_put(skb, len); -#ifdef DEBUG_PKT - printk(KERN_DEBUG "%s RX(%i):", dev->name, skb->len); - debug_frame(skb); -#endif - dev->stats.rx_packets++; - dev->stats.rx_bytes += skb->len; - skb->protocol = hdlc_type_trans(skb, dev); - netif_rx(skb); -} - - - -/* Receive DMA interrupt service */ -static inline void sca_rx_intr(port_t *port) -{ - struct net_device *dev = port_to_dev(port); - u16 dmac = get_dmac_rx(port); - card_t *card = port_to_card(port); - u8 stat = sca_in(DSR_RX(phy_node(port)), card); /* read DMA Status */ - - /* Reset DSR status bits */ - sca_out((stat & (DSR_EOT | DSR_EOM | DSR_BOF | DSR_COF)) | DSR_DWE, - DSR_RX(phy_node(port)), card); - - if (stat & DSR_BOF) - /* Dropped one or more frames */ - dev->stats.rx_over_errors++; - - while (1) { - u32 desc_off = desc_offset(port, port->rxin, 0); - pkt_desc __iomem *desc; - u32 cda = sca_ina(dmac + CDAL, card); - - if ((cda >= desc_off) && (cda < desc_off + sizeof(pkt_desc))) - break; /* No frame received */ - - desc = desc_address(port, port->rxin, 0); - stat = readb(&desc->stat); - if (!(stat & ST_RX_EOM)) - port->rxpart = 1; /* partial frame received */ - else if ((stat & ST_ERROR_MASK) || port->rxpart) { - dev->stats.rx_errors++; - if (stat & ST_RX_OVERRUN) - dev->stats.rx_fifo_errors++; - else if ((stat & (ST_RX_SHORT | ST_RX_ABORT | - ST_RX_RESBIT)) || port->rxpart) - dev->stats.rx_frame_errors++; - else if (stat & ST_RX_CRC) - dev->stats.rx_crc_errors++; - if (stat & ST_RX_EOM) - port->rxpart = 0; /* received last fragment */ - } else - sca_rx(card, port, desc, port->rxin); - - /* Set new error descriptor address */ - sca_outa(desc_off, dmac + EDAL, card); - port->rxin = next_desc(port, port->rxin, 0); - } - - /* make sure RX DMA is enabled */ - sca_out(DSR_DE, DSR_RX(phy_node(port)), card); -} - - - -/* Transmit DMA interrupt service */ -static inline void sca_tx_intr(port_t *port) -{ - struct net_device *dev = port_to_dev(port); - u16 dmac = get_dmac_tx(port); - card_t* card = port_to_card(port); - u8 stat; - - spin_lock(&port->lock); - - stat = sca_in(DSR_TX(phy_node(port)), card); /* read DMA Status */ - - /* Reset DSR status bits */ - sca_out((stat & (DSR_EOT | DSR_EOM | DSR_BOF | DSR_COF)) | DSR_DWE, - DSR_TX(phy_node(port)), card); - - while (1) { - pkt_desc __iomem *desc; - - u32 desc_off = desc_offset(port, port->txlast, 1); - u32 cda = sca_ina(dmac + CDAL, card); - if ((cda >= desc_off) && (cda < desc_off + sizeof(pkt_desc))) - break; /* Transmitter is/will_be sending this frame */ - - desc = desc_address(port, port->txlast, 1); - dev->stats.tx_packets++; - dev->stats.tx_bytes += readw(&desc->len); - writeb(0, &desc->stat); /* Free descriptor */ - port->txlast = next_desc(port, port->txlast, 1); - } - - netif_wake_queue(dev); - spin_unlock(&port->lock); -} - - - -static irqreturn_t sca_intr(int irq, void* dev_id) -{ - card_t *card = dev_id; - int i; - u8 stat; - int handled = 0; - -#ifndef ALL_PAGES_ALWAYS_MAPPED - u8 page = sca_get_page(card); -#endif - - while((stat = sca_intr_status(card)) != 0) { - handled = 1; - for (i = 0; i < 2; i++) { - port_t *port = get_port(card, i); - if (port) { - if (stat & SCA_INTR_MSCI(i)) - sca_msci_intr(port); - - if (stat & SCA_INTR_DMAC_RX(i)) - sca_rx_intr(port); - - if (stat & SCA_INTR_DMAC_TX(i)) - sca_tx_intr(port); - } - } - } - -#ifndef ALL_PAGES_ALWAYS_MAPPED - openwin(card, page); /* Restore original page */ -#endif - return IRQ_RETVAL(handled); -} - - - -static void sca_set_port(port_t *port) -{ - card_t* card = port_to_card(port); - u16 msci = get_msci(port); - u8 md2 = sca_in(msci + MD2, card); - unsigned int tmc, br = 10, brv = 1024; - - - if (port->settings.clock_rate > 0) { - /* Try lower br for better accuracy*/ - do { - br--; - brv >>= 1; /* brv = 2^9 = 512 max in specs */ - - /* Baud Rate = CLOCK_BASE / TMC / 2^BR */ - tmc = CLOCK_BASE / brv / port->settings.clock_rate; - }while (br > 1 && tmc <= 128); - - if (tmc < 1) { - tmc = 1; - br = 0; /* For baud=CLOCK_BASE we use tmc=1 br=0 */ - brv = 1; - } else if (tmc > 255) - tmc = 256; /* tmc=0 means 256 - low baud rates */ - - port->settings.clock_rate = CLOCK_BASE / brv / tmc; - } else { - br = 9; /* Minimum clock rate */ - tmc = 256; /* 8bit = 0 */ - port->settings.clock_rate = CLOCK_BASE / (256 * 512); - } - - port->rxs = (port->rxs & ~CLK_BRG_MASK) | br; - port->txs = (port->txs & ~CLK_BRG_MASK) | br; - port->tmc = tmc; - - /* baud divisor - time constant*/ -#ifdef __HD64570_H - sca_out(port->tmc, msci + TMC, card); -#else - sca_out(port->tmc, msci + TMCR, card); - sca_out(port->tmc, msci + TMCT, card); -#endif - - /* Set BRG bits */ - sca_out(port->rxs, msci + RXS, card); - sca_out(port->txs, msci + TXS, card); - - if (port->settings.loopback) - md2 |= MD2_LOOPBACK; - else - md2 &= ~MD2_LOOPBACK; - - sca_out(md2, msci + MD2, card); - -} - - - -static void sca_open(struct net_device *dev) -{ - port_t *port = dev_to_port(dev); - card_t* card = port_to_card(port); - u16 msci = get_msci(port); - u8 md0, md2; - - switch(port->encoding) { - case ENCODING_NRZ: md2 = MD2_NRZ; break; - case ENCODING_NRZI: md2 = MD2_NRZI; break; - case ENCODING_FM_MARK: md2 = MD2_FM_MARK; break; - case ENCODING_FM_SPACE: md2 = MD2_FM_SPACE; break; - default: md2 = MD2_MANCHESTER; - } - - if (port->settings.loopback) - md2 |= MD2_LOOPBACK; - - switch(port->parity) { - case PARITY_CRC16_PR0: md0 = MD0_HDLC | MD0_CRC_16_0; break; - case PARITY_CRC16_PR1: md0 = MD0_HDLC | MD0_CRC_16; break; -#ifdef __HD64570_H - case PARITY_CRC16_PR0_CCITT: md0 = MD0_HDLC | MD0_CRC_ITU_0; break; -#else - case PARITY_CRC32_PR1_CCITT: md0 = MD0_HDLC | MD0_CRC_ITU32; break; -#endif - case PARITY_CRC16_PR1_CCITT: md0 = MD0_HDLC | MD0_CRC_ITU; break; - default: md0 = MD0_HDLC | MD0_CRC_NONE; - } - - sca_out(CMD_RESET, msci + CMD, card); - sca_out(md0, msci + MD0, card); - sca_out(0x00, msci + MD1, card); /* no address field check */ - sca_out(md2, msci + MD2, card); - sca_out(0x7E, msci + IDL, card); /* flag character 0x7E */ -#ifdef __HD64570_H - sca_out(CTL_IDLE, msci + CTL, card); -#else - /* Skip the rest of underrun frame */ - sca_out(CTL_IDLE | CTL_URCT | CTL_URSKP, msci + CTL, card); -#endif - -#ifdef __HD64570_H - /* Allow at least 8 bytes before requesting RX DMA operation */ - /* TX with higher priority and possibly with shorter transfers */ - sca_out(0x07, msci + RRC, card); /* +1=RXRDY/DMA activation condition*/ - sca_out(0x10, msci + TRC0, card); /* = TXRDY/DMA activation condition*/ - sca_out(0x14, msci + TRC1, card); /* +1=TXRDY/DMA deactiv condition */ -#else - sca_out(0x0F, msci + RNR, card); /* +1=RX DMA activation condition */ - sca_out(0x3C, msci + TFS, card); /* +1 = TX start */ - sca_out(0x38, msci + TCR, card); /* =Critical TX DMA activ condition */ - sca_out(0x38, msci + TNR0, card); /* =TX DMA activation condition */ - sca_out(0x3F, msci + TNR1, card); /* +1=TX DMA deactivation condition*/ -#endif - -/* We're using the following interrupts: - - TXINT (DMAC completed all transmisions, underrun or DCD change) - - all DMA interrupts -*/ - - sca_set_carrier(port); - -#ifdef __HD64570_H - /* MSCI TX INT and RX INT A IRQ enable */ - sca_out(IE0_TXINT | IE0_RXINTA, msci + IE0, card); - sca_out(IE1_UDRN | IE1_CDCD, msci + IE1, card); - sca_out(sca_in(IER0, card) | (phy_node(port) ? 0xC0 : 0x0C), - IER0, card); /* TXINT and RXINT */ - /* enable DMA IRQ */ - sca_out(sca_in(IER1, card) | (phy_node(port) ? 0xF0 : 0x0F), - IER1, card); -#else - /* MSCI TXINT and RXINTA interrupt enable */ - sca_outl(IE0_TXINT | IE0_RXINTA | IE0_UDRN | IE0_CDCD, msci + IE0, - card); - /* DMA & MSCI IRQ enable */ - sca_outl(sca_inl(IER0, card) | - (phy_node(port) ? 0x0A006600 : 0x000A0066), IER0, card); -#endif - -#ifdef __HD64570_H - sca_out(port->tmc, msci + TMC, card); /* Restore registers */ -#else - sca_out(port->tmc, msci + TMCR, card); - sca_out(port->tmc, msci + TMCT, card); -#endif - sca_out(port->rxs, msci + RXS, card); - sca_out(port->txs, msci + TXS, card); - sca_out(CMD_TX_ENABLE, msci + CMD, card); - sca_out(CMD_RX_ENABLE, msci + CMD, card); - - netif_start_queue(dev); -} - - - -static void sca_close(struct net_device *dev) -{ - port_t *port = dev_to_port(dev); - card_t* card = port_to_card(port); - - /* reset channel */ - sca_out(CMD_RESET, get_msci(port) + CMD, port_to_card(port)); -#ifdef __HD64570_H - /* disable MSCI interrupts */ - sca_out(sca_in(IER0, card) & (phy_node(port) ? 0x0F : 0xF0), - IER0, card); - /* disable DMA interrupts */ - sca_out(sca_in(IER1, card) & (phy_node(port) ? 0x0F : 0xF0), - IER1, card); -#else - /* disable DMA & MSCI IRQ */ - sca_outl(sca_inl(IER0, card) & - (phy_node(port) ? 0x00FF00FF : 0xFF00FF00), IER0, card); -#endif - netif_stop_queue(dev); -} - - - -static int sca_attach(struct net_device *dev, unsigned short encoding, - unsigned short parity) -{ - if (encoding != ENCODING_NRZ && - encoding != ENCODING_NRZI && - encoding != ENCODING_FM_MARK && - encoding != ENCODING_FM_SPACE && - encoding != ENCODING_MANCHESTER) - return -EINVAL; - - if (parity != PARITY_NONE && - parity != PARITY_CRC16_PR0 && - parity != PARITY_CRC16_PR1 && -#ifdef __HD64570_H - parity != PARITY_CRC16_PR0_CCITT && -#else - parity != PARITY_CRC32_PR1_CCITT && -#endif - parity != PARITY_CRC16_PR1_CCITT) - return -EINVAL; - - dev_to_port(dev)->encoding = encoding; - dev_to_port(dev)->parity = parity; - return 0; -} - - - -#ifdef DEBUG_RINGS -static void sca_dump_rings(struct net_device *dev) -{ - port_t *port = dev_to_port(dev); - card_t *card = port_to_card(port); - u16 cnt; -#if !defined(PAGE0_ALWAYS_MAPPED) && !defined(ALL_PAGES_ALWAYS_MAPPED) - u8 page; -#endif - -#if !defined(PAGE0_ALWAYS_MAPPED) && !defined(ALL_PAGES_ALWAYS_MAPPED) - page = sca_get_page(card); - openwin(card, 0); -#endif - - printk(KERN_DEBUG "RX ring: CDA=%u EDA=%u DSR=%02X in=%u %sactive", - sca_ina(get_dmac_rx(port) + CDAL, card), - sca_ina(get_dmac_rx(port) + EDAL, card), - sca_in(DSR_RX(phy_node(port)), card), port->rxin, - sca_in(DSR_RX(phy_node(port)), card) & DSR_DE?"":"in"); - for (cnt = 0; cnt < port_to_card(port)->rx_ring_buffers; cnt++) - printk(" %02X", readb(&(desc_address(port, cnt, 0)->stat))); - - printk("\n" KERN_DEBUG "TX ring: CDA=%u EDA=%u DSR=%02X in=%u " - "last=%u %sactive", - sca_ina(get_dmac_tx(port) + CDAL, card), - sca_ina(get_dmac_tx(port) + EDAL, card), - sca_in(DSR_TX(phy_node(port)), card), port->txin, port->txlast, - sca_in(DSR_TX(phy_node(port)), card) & DSR_DE ? "" : "in"); - - for (cnt = 0; cnt < port_to_card(port)->tx_ring_buffers; cnt++) - printk(" %02X", readb(&(desc_address(port, cnt, 1)->stat))); - printk("\n"); - - printk(KERN_DEBUG "MSCI: MD: %02x %02x %02x, " - "ST: %02x %02x %02x %02x" -#ifdef __HD64572_H - " %02x" -#endif - ", FST: %02x CST: %02x %02x\n", - sca_in(get_msci(port) + MD0, card), - sca_in(get_msci(port) + MD1, card), - sca_in(get_msci(port) + MD2, card), - sca_in(get_msci(port) + ST0, card), - sca_in(get_msci(port) + ST1, card), - sca_in(get_msci(port) + ST2, card), - sca_in(get_msci(port) + ST3, card), -#ifdef __HD64572_H - sca_in(get_msci(port) + ST4, card), -#endif - sca_in(get_msci(port) + FST, card), - sca_in(get_msci(port) + CST0, card), - sca_in(get_msci(port) + CST1, card)); - -#ifdef __HD64572_H - printk(KERN_DEBUG "ILAR: %02x ISR: %08x %08x\n", sca_in(ILAR, card), - sca_inl(ISR0, card), sca_inl(ISR1, card)); -#else - printk(KERN_DEBUG "ISR: %02x %02x %02x\n", sca_in(ISR0, card), - sca_in(ISR1, card), sca_in(ISR2, card)); -#endif - -#if !defined(PAGE0_ALWAYS_MAPPED) && !defined(ALL_PAGES_ALWAYS_MAPPED) - openwin(card, page); /* Restore original page */ -#endif -} -#endif /* DEBUG_RINGS */ - - - -static int sca_xmit(struct sk_buff *skb, struct net_device *dev) -{ - port_t *port = dev_to_port(dev); - card_t *card = port_to_card(port); - pkt_desc __iomem *desc; - u32 buff, len; -#ifndef ALL_PAGES_ALWAYS_MAPPED - u8 page; - u32 maxlen; -#endif - - spin_lock_irq(&port->lock); - - desc = desc_address(port, port->txin + 1, 1); - if (readb(&desc->stat)) { /* allow 1 packet gap */ - /* should never happen - previous xmit should stop queue */ -#ifdef DEBUG_PKT - printk(KERN_DEBUG "%s: transmitter buffer full\n", dev->name); -#endif - netif_stop_queue(dev); - spin_unlock_irq(&port->lock); - return 1; /* request packet to be queued */ - } - -#ifdef DEBUG_PKT - printk(KERN_DEBUG "%s TX(%i):", dev->name, skb->len); - debug_frame(skb); -#endif - - desc = desc_address(port, port->txin, 1); - buff = buffer_offset(port, port->txin, 1); - len = skb->len; -#ifndef ALL_PAGES_ALWAYS_MAPPED - page = buff / winsize(card); - buff = buff % winsize(card); - maxlen = winsize(card) - buff; - - openwin(card, page); - if (len > maxlen) { - memcpy_toio(winbase(card) + buff, skb->data, maxlen); - openwin(card, page + 1); - memcpy_toio(winbase(card), skb->data + maxlen, len - maxlen); - } - else -#endif - memcpy_toio(winbase(card) + buff, skb->data, len); - -#if !defined(PAGE0_ALWAYS_MAPPED) && !defined(ALL_PAGES_ALWAYS_MAPPED) - openwin(card, 0); /* select pkt_desc table page back */ -#endif - writew(len, &desc->len); - writeb(ST_TX_EOM, &desc->stat); - dev->trans_start = jiffies; - - port->txin = next_desc(port, port->txin, 1); - sca_outa(desc_offset(port, port->txin, 1), - get_dmac_tx(port) + EDAL, card); - - sca_out(DSR_DE, DSR_TX(phy_node(port)), card); /* Enable TX DMA */ - - desc = desc_address(port, port->txin + 1, 1); - if (readb(&desc->stat)) /* allow 1 packet gap */ - netif_stop_queue(dev); - - spin_unlock_irq(&port->lock); - - dev_kfree_skb(skb); - return 0; -} - - - -#ifdef NEED_DETECT_RAM -static u32 __devinit sca_detect_ram(card_t *card, u8 __iomem *rambase, u32 ramsize) -{ - /* Round RAM size to 32 bits, fill from end to start */ - u32 i = ramsize &= ~3; - -#ifndef ALL_PAGES_ALWAYS_MAPPED - u32 size = winsize(card); - - openwin(card, (i - 4) / size); /* select last window */ -#endif - do { - i -= 4; -#ifndef ALL_PAGES_ALWAYS_MAPPED - if ((i + 4) % size == 0) - openwin(card, i / size); - writel(i ^ 0x12345678, rambase + i % size); -#else - writel(i ^ 0x12345678, rambase + i); -#endif - }while (i > 0); - - for (i = 0; i < ramsize ; i += 4) { -#ifndef ALL_PAGES_ALWAYS_MAPPED - if (i % size == 0) - openwin(card, i / size); - - if (readl(rambase + i % size) != (i ^ 0x12345678)) - break; -#else - if (readl(rambase + i) != (i ^ 0x12345678)) - break; -#endif - } - - return i; -} -#endif /* NEED_DETECT_RAM */ - - - -static void __devinit sca_init(card_t *card, int wait_states) -{ - sca_out(wait_states, WCRL, card); /* Wait Control */ - sca_out(wait_states, WCRM, card); - sca_out(wait_states, WCRH, card); - - sca_out(0, DMER, card); /* DMA Master disable */ - sca_out(0x03, PCR, card); /* DMA priority */ - sca_out(0, DSR_RX(0), card); /* DMA disable - to halt state */ - sca_out(0, DSR_TX(0), card); - sca_out(0, DSR_RX(1), card); - sca_out(0, DSR_TX(1), card); - sca_out(DMER_DME, DMER, card); /* DMA Master enable */ -} diff --git a/drivers/net/wan/n2.c b/drivers/net/wan/n2.c index 0a566b0daac..5b9cd2d561c 100644 --- a/drivers/net/wan/n2.c +++ b/drivers/net/wan/n2.c @@ -160,7 +160,7 @@ static __inline__ void openwin(card_t *card, u8 page) -#include "hd6457x.c" +#include "hd64570.c" diff --git a/drivers/net/wan/pc300too.c b/drivers/net/wan/pc300too.c index 22267116522..811e3af8a96 100644 --- a/drivers/net/wan/pc300too.c +++ b/drivers/net/wan/pc300too.c @@ -128,7 +128,7 @@ typedef struct card_s { #define get_port(card, port) ((port) < (card)->n_ports ? \ (&(card)->ports[port]) : (NULL)) -#include "hd6457x.c" +#include "hd64572.c" static void pc300_set_iface(port_t *port) diff --git a/drivers/net/wan/pci200syn.c b/drivers/net/wan/pci200syn.c index bba111cdeeb..f4aa3263790 100644 --- a/drivers/net/wan/pci200syn.c +++ b/drivers/net/wan/pci200syn.c @@ -127,7 +127,7 @@ static inline void new_memcpy_toio(char __iomem *dest, char *src, int length) #undef memcpy_toio #define memcpy_toio new_memcpy_toio -#include "hd6457x.c" +#include "hd64572.c" static void pci200_set_iface(port_t *port) -- cgit v1.2.3