/*
- * Hitachi SCA HD64570 and HD64572 common driver for Linux
+ * Hitachi SCA HD64570 driver for Linux
*
* Copyright (C) 1998-2003 Krzysztof Halasa <khc@pm.waw.pl>
*
* 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
+ * Source of information: Hitachi HD64570 SCA User's Manual
*
* We use the following SCA memory map:
*
* tx_ring_buffers * HDLC_MAX_MRU = logical channel #0 TX buffers (if used)
*/
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/slab.h>
-#include <linux/jiffies.h>
-#include <linux/types.h>
+#include <linux/bitops.h>
+#include <linux/errno.h>
#include <linux/fcntl.h>
-#include <linux/interrupt.h>
+#include <linux/hdlc.h>
#include <linux/in.h>
-#include <linux/string.h>
-#include <linux/errno.h>
#include <linux/init.h>
+#include <linux/interrupt.h>
#include <linux/ioport.h>
-#include <linux/bitops.h>
-
-#include <asm/system.h>
-#include <asm/uaccess.h>
-#include <asm/io.h>
-
+#include <linux/jiffies.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
#include <linux/netdevice.h>
#include <linux/skbuff.h>
-
-#include <linux/hdlc.h>
-
-#if (!defined (__HD64570_H) && !defined (__HD64572_H)) || \
- (defined (__HD64570_H) && defined (__HD64572_H))
-#error Either hd64570.h or hd64572.h must be included
-#endif
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/types.h>
+#include <asm/io.h>
+#include <asm/system.h>
+#include <asm/uaccess.h>
+#include "hd64570.h"
#define get_msci(port) (phy_node(port) ? MSCI1_OFFSET : MSCI0_OFFSET)
#define get_dmac_rx(port) (phy_node(port) ? DMAC1RX_OFFSET : DMAC0RX_OFFSET)
#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)
{
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 (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);
}
-
static inline u16 desc_abs_number(port_t *port, u16 desc, int transmit)
{
u16 rx_buffs = port_to_card(port)->rx_ring_buffers;
}
-
static inline u16 desc_offset(port_t *port, u16 desc, int transmit)
{
/* Descriptor offset always fits in 16 bytes */
}
-
-static inline pkt_desc __iomem *desc_address(port_t *port, u16 desc, int transmit)
+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));
+ + desc_offset(port, desc, transmit));
#else
return (pkt_desc __iomem *)(winbase(port_to_card(port))
- + desc_offset(port, desc, transmit));
+ + 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 +
}
-static void sca_init_sync_port(port_t *port)
+static void sca_init_port(port_t *port)
{
card_t *card = port_to_card(port);
int transmit, i;
port->txin = 0;
port->txlast = 0;
-#if !defined(PAGE0_ALWAYS_MAPPED) && !defined(ALL_PAGES_ALWAYS_MAPPED)
+#ifndef PAGE0_ALWAYS_MAPPED
openwin(card, 0);
#endif
u16 chain_off = desc_offset(port, i + 1, transmit);
u32 buff_off = buffer_offset(port, i, transmit);
- writea(chain_off, &desc->cp);
+ writew(chain_off, &desc->cp);
writel(buff_off, &desc->bp);
writew(0, &desc->len);
writeb(0, &desc->stat);
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);
+ sca_out(0, dmac + CPB, card); /* pointer base */
+ sca_outw(desc_offset(port, 0, transmit), dmac + CDAL, card);
if (!transmit)
- sca_outa(desc_offset(port, buffs - 1, transmit),
+ sca_outw(desc_offset(port, buffs - 1, transmit),
dmac + EDAL, card);
else
- sca_outa(desc_offset(port, 0, transmit), dmac + EDAL,
+ sca_outw(desc_offset(port, 0, transmit), dmac + EDAL,
card);
/* clear frame end interrupt counter */
}
-
#ifdef NEED_SCA_MSCI_INTR
/* MSCI interrupt service */
static inline void sca_msci_intr(port_t *port)
#endif
-
-static inline void sca_rx(card_t *card, port_t *port, pkt_desc __iomem *desc, u16 rxin)
+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);
}
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 + 1);
memcpy_fromio(skb->data + maxlen, winbase(card), len - maxlen);
} else
-#endif
- memcpy_fromio(skb->data, winbase(card) + buff, len);
+ 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);
+#ifndef PAGE0_ALWAYS_MAPPED
+ openwin(card, 0); /* select pkt_desc table page back */
#endif
skb_put(skb, len);
#ifdef DEBUG_PKT
}
-
/* Receive DMA interrupt service */
static inline void sca_rx_intr(port_t *port)
{
while (1) {
u32 desc_off = desc_offset(port, port->rxin, 0);
pkt_desc __iomem *desc;
- u32 cda = sca_ina(dmac + CDAL, card);
+ u32 cda = sca_inw(dmac + CDAL, card);
if ((cda >= desc_off) && (cda < desc_off + sizeof(pkt_desc)))
break; /* No frame received */
sca_rx(card, port, desc, port->rxin);
/* Set new error descriptor address */
- sca_outa(desc_off, dmac + EDAL, card);
+ sca_outw(desc_off, dmac + EDAL, card);
port->rxin = next_desc(port, port->rxin, 0);
}
}
-
/* Transmit DMA interrupt service */
static inline void sca_tx_intr(port_t *port)
{
pkt_desc __iomem *desc;
u32 desc_off = desc_offset(port, port->txlast, 1);
- u32 cda = sca_ina(dmac + CDAL, card);
+ u32 cda = sca_inw(dmac + CDAL, card);
if ((cda >= desc_off) && (cda < desc_off + sizeof(pkt_desc)))
break; /* Transmitter is/will_be sending this frame */
}
-
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;
}
}
-#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);
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);
}
-
static void sca_open(struct net_device *dev)
{
port_t *port = dev_to_port(dev);
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(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);
/* 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);
}
-
static void sca_close(struct net_device *dev)
{
port_t *port = dev_to_port(dev);
/* 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 (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;
}
-
#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
+#ifndef PAGE0_ALWAYS_MAPPED
+ u8 page = sca_get_page(card);
-#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_inw(get_dmac_rx(port) + CDAL, card),
+ sca_inw(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");
+ 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_inw(get_dmac_tx(port) + CDAL, card),
+ sca_inw(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");
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",
+ printk(KERN_DEBUG "MSCI: MD: %02x %02x %02x, ST: %02x %02x %02x %02x,"
+ " 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) + 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)
+#ifndef PAGE0_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 */
- }
+ BUG_ON(readb(&desc->stat)); /* previous xmit should stop queue */
#ifdef DEBUG_PKT
printk(KERN_DEBUG "%s TX(%i):", dev->name, skb->len);
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;
memcpy_toio(winbase(card) + buff, skb->data, maxlen);
openwin(card, page + 1);
memcpy_toio(winbase(card), skb->data + maxlen, len - maxlen);
- }
- else
-#endif
+ } else
memcpy_toio(winbase(card) + buff, skb->data, len);
-#if !defined(PAGE0_ALWAYS_MAPPED) && !defined(ALL_PAGES_ALWAYS_MAPPED)
+#ifndef PAGE0_ALWAYS_MAPPED
openwin(card, 0); /* select pkt_desc table page back */
#endif
writew(len, &desc->len);
dev->trans_start = jiffies;
port->txin = next_desc(port, port->txin, 1);
- sca_outa(desc_offset(port, port->txin, 1),
+ sca_outw(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 */
}
-
#ifdef NEED_DETECT_RAM
-static u32 __devinit sca_detect_ram(card_t *card, u8 __iomem *rambase, u32 ramsize)
+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);
+ } 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 */
git.openpandora.org / pandora-kernel.git / commitdiff