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Generalise three-wire interface to generic SPI interface.

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Update rtl8139 driver to instantiate an SPI interface with a three-wire
device attached.
This commit is contained in:
Michael Brown
2006-06-14 00:22:50 +00:00
parent ab4f96e525
commit 3b51c719d3
6 changed files with 427 additions and 182 deletions
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96
src/drivers/net/rtl8139.c
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@@ -77,7 +77,8 @@
#include <gpxe/ethernet.h>
#include <gpxe/pkbuff.h>
#include <gpxe/netdevice.h>
#include <gpxe/nvs/threewire.h>
#include <gpxe/spi.h>
#include <gpxe/threewire.h>
#define TX_RING_SIZE 4
@@ -92,10 +93,11 @@ struct rtl8139_rx {
};
struct rtl8139_nic {
struct threewire eeprom;
unsigned short ioaddr;
struct rtl8139_tx tx;
struct rtl8139_rx rx;
struct spi_bit_basher spibit;
struct threewire_device eeprom;
};
/* Tuning Parameters */
@@ -192,8 +194,8 @@ enum RxConfigBits {
};
/* EEPROM access */
#define EE_MODE_PROGRAM 0x80
#define EE_MODE_NORMAL 0x00
#define EE_M1 0x80 /* Mode select bit 1 */
#define EE_M0 0x40 /* Mode select bit 0 */
#define EE_CS 0x08 /* EEPROM chip select */
#define EE_SK 0x04 /* EEPROM shift clock */
#define EE_DI 0x02 /* Data in */
@@ -202,51 +204,40 @@ enum RxConfigBits {
/* Offsets within EEPROM (these are word offsets) */
#define EE_MAC 7
static inline struct rtl8139_nic * three_to_rtl ( struct threewire *three ) {
return container_of ( three, struct rtl8139_nic, eeprom );
static inline struct rtl8139_nic *
basher_to_rtl ( struct bit_basher *basher ) {
return container_of ( basher, struct rtl8139_nic, spibit.basher );
}
static void rtl_setcs ( struct threewire *three, int cs ) {
struct rtl8139_nic *rtl = three_to_rtl ( three );
unsigned int eereg;
eereg = cs ? ( EE_MODE_PROGRAM | EE_CS ) : ( EE_MODE_NORMAL );
outb ( eereg, rtl->ioaddr + Cfg9346 );
}
static void rtl_setsk ( struct threewire *three, int sk ) {
struct rtl8139_nic *rtl = three_to_rtl ( three );
unsigned int eereg;
eereg = inb ( rtl->ioaddr + Cfg9346 );
eereg = ( eereg & ~EE_SK ) | ( sk ? EE_SK : 0 );
outb ( eereg, rtl->ioaddr + Cfg9346 );
}
static void rtl_setdi ( struct threewire *three, int di ) {
struct rtl8139_nic *rtl = three_to_rtl ( three );
unsigned int eereg;
eereg = inb ( rtl->ioaddr + Cfg9346 );
eereg = ( eereg & ~EE_DI ) | ( di ? EE_DI : 0 );
outb ( eereg, rtl->ioaddr + Cfg9346 );
}
static int rtl_getdo ( struct threewire *three ) {
struct rtl8139_nic *rtl = three_to_rtl ( three );
unsigned int eereg;
eereg = ( inb ( rtl->ioaddr + Cfg9346 ) & EE_DO );
return eereg;
}
static struct threewire_operations rtl_three_ops = {
.setcs = rtl_setcs,
.setsk = rtl_setsk,
.setdi = rtl_setdi,
.getdo = rtl_getdo,
static const uint8_t rtl_ee_bits[] = {
[SPI_BIT_SCLK] = EE_SK,
[SPI_BIT_MOSI] = EE_DI,
[SPI_BIT_MISO] = EE_DO,
[SPI_BIT_SS(0)] = ( EE_CS | EE_M1 ),
};
static int rtl_spi_read_bit ( struct bit_basher *basher,
unsigned int bit_id ) {
struct rtl8139_nic *rtl = basher_to_rtl ( basher );
uint8_t mask = rtl_ee_bits[bit_id];
uint8_t eereg;
eereg = inb ( rtl->ioaddr + Cfg9346 );
return ( eereg & mask );
}
static void rtl_spi_write_bit ( struct bit_basher *basher,
unsigned int bit_id, unsigned long data ) {
struct rtl8139_nic *rtl = basher_to_rtl ( basher );
uint8_t mask = rtl_ee_bits[bit_id];
uint8_t eereg;
eereg = inb ( rtl->ioaddr + Cfg9346 );
eereg &= ~mask;
eereg |= ( data & mask );
outb ( eereg, rtl->ioaddr + Cfg9346 );
}
/**
* Set up for EEPROM access
*
@@ -255,14 +246,20 @@ static struct threewire_operations rtl_three_ops = {
static void rtl_init_eeprom ( struct rtl8139_nic *rtl ) {
int ee9356;
/* Initialise three-wire bus */
rtl->spibit.basher.read = rtl_spi_read_bit;
rtl->spibit.basher.write = rtl_spi_write_bit;
rtl->spibit.spi.mode = SPI_MODE_THREEWIRE;
init_spi_bit_basher ( &rtl->spibit );
/* Detect EEPROM type and initialise three-wire device */
ee9356 = ( inw ( rtl->ioaddr + RxConfig ) & Eeprom9356 );
DBG ( "EEPROM is an %s\n", ee9356 ? "AT93C56" : "AT93C46" );
rtl->eeprom.ops = &rtl_three_ops;
rtl->eeprom.adrsize =
( ee9356 ? AT93C56_ORG16_ADRSIZE : AT93C46_ORG16_ADRSIZE );
rtl->eeprom.datasize =
( ee9356 ? AT93C56_ORG16_DATASIZE : AT93C46_ORG16_DATASIZE );
rtl->eeprom.udelay = 1;
rtl->eeprom.spi = &rtl->spibit.spi;
}
/**
@@ -279,9 +276,8 @@ static void rtl_read_mac ( struct rtl8139_nic *rtl, uint8_t *mac_addr ) {
int i;
DBG ( "MAC address is " );
for ( i = 0 ; i < ( ETH_ALEN / 2 ) ; i++ ) {
u.word = cpu_to_le16 ( threewire_read ( &rtl->eeprom,
EE_MAC + i ) );
for ( i = EE_MAC ; i < ( EE_MAC + ( ETH_ALEN / 2 ) ) ; i++ ) {
u.word = cpu_to_le16 ( threewire_read ( &rtl->eeprom, i ) );
*mac_addr++ = u.bytes[0];
*mac_addr++ = u.bytes[1];
DBG ( "%02x%02x", u.bytes[0], u.bytes[1] );