Convert CS8900 Ethernet driver to CONFIG_NET_MULTI API

All in-tree boards that use this controller have CONFIG_NET_MULTI added
Also:
  - changed CONFIG_DRIVER_CS8900 to CONFIG_CS8900
  - changed CS8900_BASE to CONFIG_CS8900_BASE
  - changed CS8900_BUS?? to CONFIG_CS8900_BUS??
  - cleaned up line lengths
  - modified VCMA9 command function that accesses the device
  - removed MAC address initialization from lib_arm/board.c

Signed-off-by: Ben Warren <biggerbadderben@gmail.com>
Tested-by: Wolfgang Denk <wd@denx.de>
Acked-by: Wolfgang Denk <wd@denx.de>

1 files changed, 162 insertions, 114 deletions

diff --git a/drivers/net/cs8900.c b/drivers/net/cs8900.c
index 5e2b3b0..587f7f6 100644
--- a/drivers/net/cs8900.c
+++ b/drivers/net/cs8900.c
@@ -1,6 +1,9 @@
 /*
  * Cirrus Logic CS8900A Ethernet
  *
+ * (C) 2009 Ben Warren , biggerbadderben@gmail.com
+ *     Converted to use CONFIG_NET_MULTI API
+ *
  * (C) 2003 Wolfgang Denk, wd@denx.de
  *     Extension to synchronize ethaddr environment variable
  *     against value in EEPROM
@@ -38,220 +41,229 @@
 
 #include <common.h>
 #include <command.h>
-#include "cs8900.h"
+#include <asm/io.h>
 #include <net.h>
+#include <malloc.h>
+#include "cs8900.h"
 
 #undef DEBUG
 
 /* packet page register access functions */
 
-#ifdef CS8900_BUS32
+#ifdef CONFIG_CS8900_BUS32
+
+#define REG_WRITE(v, a) writel((v),(a))
+#define REG_READ(a) readl((a))
+
 /* we don't need 16 bit initialisation on 32 bit bus */
 #define get_reg_init_bus(x) get_reg((x))
+
 #else
-static unsigned short get_reg_init_bus (int regno)
-{
-	/* force 16 bit busmode */
-	volatile unsigned char c;
 
-	c = CS8900_BUS16_0;
-	c = CS8900_BUS16_1;
-	c = CS8900_BUS16_0;
-	c = CS8900_BUS16_1;
-	c = CS8900_BUS16_0;
+#define REG_WRITE(v, a) writew((v),(a))
+#define REG_READ(a) readw((a))
 
-	CS8900_PPTR = regno;
-	return CS8900_PDATA;
+static u16 get_reg_init_bus(struct eth_device *dev, int regno)
+{
+	/* force 16 bit busmode */
+	volatile u8 c;
+	struct cs8900_priv *priv = (struct cs8900_priv *)(dev->priv);
+	uint8_t volatile * const iob = (uint8_t volatile * const)dev->iobase;
+
+	c = readb(iob);
+	c = readb(iob + 1);
+	c = readb(iob);
+	c = readb(iob + 1);
+	c = readb(iob);
+
+	REG_WRITE(regno, &priv->regs->pptr);
+	return REG_READ(&priv->regs->pdata);
 }
 #endif
 
-static unsigned short get_reg (int regno)
+static u16 get_reg(struct eth_device *dev, int regno)
 {
-	CS8900_PPTR = regno;
-	return CS8900_PDATA;
+	struct cs8900_priv *priv = (struct cs8900_priv *)(dev->priv);
+	REG_WRITE(regno, &priv->regs->pptr);
+	return REG_READ(&priv->regs->pdata);
 }
 
 
-static void put_reg (int regno, unsigned short val)
+static void put_reg(struct eth_device *dev, int regno, u16 val)
 {
-	CS8900_PPTR = regno;
-	CS8900_PDATA = val;
+	struct cs8900_priv *priv = (struct cs8900_priv *)(dev->priv);
+	REG_WRITE(regno, &priv->regs->pptr);
+	REG_WRITE(val, &priv->regs->pdata);
 }
 
-static void eth_reset (void)
+static void cs8900_reset(struct eth_device *dev)
 {
 	int tmo;
-	unsigned short us;
+	u16 us;
 
 	/* reset NIC */
-	put_reg (PP_SelfCTL, get_reg (PP_SelfCTL) | PP_SelfCTL_Reset);
+	put_reg(dev, PP_SelfCTL, get_reg(dev, PP_SelfCTL) | PP_SelfCTL_Reset);
 
 	/* wait for 200ms */
-	udelay (200000);
+	udelay(200000);
 	/* Wait until the chip is reset */
 
-	tmo = get_timer (0) + 1 * CONFIG_SYS_HZ;
-	while ((((us = get_reg_init_bus (PP_SelfSTAT)) & PP_SelfSTAT_InitD) == 0)
-		   && tmo < get_timer (0))
+	tmo = get_timer(0) + 1 * CONFIG_SYS_HZ;
+	while ((((us = get_reg_init_bus(dev, PP_SelfSTAT)) &
+		PP_SelfSTAT_InitD) == 0) && tmo < get_timer(0))
 		/*NOP*/;
 }
 
-static void eth_reginit (void)
+static void cs8900_reginit(struct eth_device *dev)
 {
 	/* receive only error free packets addressed to this card */
-	put_reg (PP_RxCTL, PP_RxCTL_IA | PP_RxCTL_Broadcast | PP_RxCTL_RxOK);
+	put_reg(dev, PP_RxCTL,
+		PP_RxCTL_IA | PP_RxCTL_Broadcast | PP_RxCTL_RxOK);
 	/* do not generate any interrupts on receive operations */
-	put_reg (PP_RxCFG, 0);
+	put_reg(dev, PP_RxCFG, 0);
 	/* do not generate any interrupts on transmit operations */
-	put_reg (PP_TxCFG, 0);
+	put_reg(dev, PP_TxCFG, 0);
 	/* do not generate any interrupts on buffer operations */
-	put_reg (PP_BufCFG, 0);
+	put_reg(dev, PP_BufCFG, 0);
 	/* enable transmitter/receiver mode */
-	put_reg (PP_LineCTL, PP_LineCTL_Rx | PP_LineCTL_Tx);
+	put_reg(dev, PP_LineCTL, PP_LineCTL_Rx | PP_LineCTL_Tx);
 }
 
-void cs8900_get_enetaddr (void)
+void cs8900_get_enetaddr(struct eth_device *dev)
 {
 	int i;
-	uchar enetaddr[6];
-
-	/* if the env is setup, then bail */
-	if (eth_getenv_enetaddr("ethaddr", enetaddr))
-		return;
 
 	/* verify chip id */
-	if (get_reg_init_bus (PP_ChipID) != 0x630e)
+	if (get_reg_init_bus(dev, PP_ChipID) != 0x630e)
 		return;
-	eth_reset ();
-	if ((get_reg (PP_SelfSTAT) & (PP_SelfSTAT_EEPROM | PP_SelfSTAT_EEPROM_OK)) ==
-			(PP_SelfSTAT_EEPROM | PP_SelfSTAT_EEPROM_OK)) {
+	cs8900_reset(dev);
+	if ((get_reg(dev, PP_SelfSTAT) &
+		(PP_SelfSTAT_EEPROM | PP_SelfSTAT_EEPROM_OK)) ==
+		(PP_SelfSTAT_EEPROM | PP_SelfSTAT_EEPROM_OK)) {
 
 		/* Load the MAC from EEPROM */
-		for (i = 0; i < 6 / 2; i++) {
-			unsigned int Addr;
+		for (i = 0; i < 3; i++) {
+			u32 Addr;
 
-			Addr = get_reg (PP_IA + i * 2);
-			enetaddr[i * 2] = Addr & 0xFF;
-			enetaddr[i * 2 + 1] = Addr >> 8;
+			Addr = get_reg(dev, PP_IA + i * 2);
+			dev->enetaddr[i * 2] = Addr & 0xFF;
+			dev->enetaddr[i * 2 + 1] = Addr >> 8;
 		}
-
-		eth_setenv_enetaddr("ethaddr", enetaddr);
-		debug("### Set environment from HW MAC addr = \"%pM\"\n", enetaddr);
 	}
 }
 
-void eth_halt (void)
+void cs8900_halt(struct eth_device *dev)
 {
 	/* disable transmitter/receiver mode */
-	put_reg (PP_LineCTL, 0);
+	put_reg(dev, PP_LineCTL, 0);
 
 	/* "shutdown" to show ChipID or kernel wouldn't find he cs8900 ... */
-	get_reg_init_bus (PP_ChipID);
+	get_reg_init_bus(dev, PP_ChipID);
 }
 
-int eth_init (bd_t * bd)
+static int cs8900_init(struct eth_device *dev, bd_t * bd)
 {
-	uchar enetaddr[6];
+	uchar *enetaddr = dev->enetaddr;
+	u16 id;
 
 	/* verify chip id */
-	if (get_reg_init_bus (PP_ChipID) != 0x630e) {
-		printf ("CS8900 Ethernet chip not found?!\n");
-		return 0;
+	id = get_reg_init_bus(dev, PP_ChipID);
+	if (id != 0x630e) {
+		printf ("CS8900 Ethernet chip not found: "
+			"ID=0x%04x instead 0x%04x\n", id, 0x630e);
+		return 1;
 	}
 
-	eth_reset ();
+	cs8900_reset (dev);
 	/* set the ethernet address */
-	eth_getenv_enetaddr("ethaddr", enetaddr);
-	put_reg (PP_IA + 0, enetaddr[0] | (enetaddr[1] << 8));
-	put_reg (PP_IA + 2, enetaddr[2] | (enetaddr[3] << 8));
-	put_reg (PP_IA + 4, enetaddr[4] | (enetaddr[5] << 8));
+	put_reg(dev, PP_IA + 0, enetaddr[0] | (enetaddr[1] << 8));
+	put_reg(dev, PP_IA + 2, enetaddr[2] | (enetaddr[3] << 8));
+	put_reg(dev, PP_IA + 4, enetaddr[4] | (enetaddr[5] << 8));
 
-	eth_reginit ();
+	cs8900_reginit(dev);
 	return 0;
 }
 
 /* Get a data block via Ethernet */
-int eth_rx (void)
+static int cs8900_recv(struct eth_device *dev)
 {
 	int i;
-	unsigned short rxlen;
-	unsigned short *addr;
-	unsigned short status;
+	u16 rxlen;
+	u16 *addr;
+	u16 status;
 
-	status = get_reg (PP_RER);
+	struct cs8900_priv *priv = (struct cs8900_priv *)(dev->priv);
+
+	status = get_reg(dev, PP_RER);
 
 	if ((status & PP_RER_RxOK) == 0)
 		return 0;
 
-	status = CS8900_RTDATA;		/* stat */
-	rxlen = CS8900_RTDATA;		/* len */
+	status = REG_READ(&priv->regs->rtdata);
+	rxlen = REG_READ(&priv->regs->rtdata);
 
-#ifdef DEBUG
 	if (rxlen > PKTSIZE_ALIGN + PKTALIGN)
-		printf ("packet too big!\n");
-#endif
-	for (addr = (unsigned short *) NetRxPackets[0], i = rxlen >> 1; i > 0;
+		debug("packet too big!\n");
+	for (addr = (u16 *) NetRxPackets[0], i = rxlen >> 1; i > 0;
 		 i--)
-		*addr++ = CS8900_RTDATA;
+		*addr++ = REG_READ(&priv->regs->rtdata);
 	if (rxlen & 1)
-		*addr++ = CS8900_RTDATA;
+		*addr++ = REG_READ(&priv->regs->rtdata);
 
 	/* Pass the packet up to the protocol layers. */
 	NetReceive (NetRxPackets[0], rxlen);
-
 	return rxlen;
 }
 
 /* Send a data block via Ethernet. */
-int eth_send (volatile void *packet, int length)
+static int cs8900_send(struct eth_device *dev,
+			volatile void *packet, int length)
 {
-	volatile unsigned short *addr;
+	volatile u16 *addr;
 	int tmo;
-	unsigned short s;
+	u16 s;
+	struct cs8900_priv *priv = (struct cs8900_priv *)(dev->priv);
 
 retry:
 	/* initiate a transmit sequence */
-	CS8900_TxCMD = PP_TxCmd_TxStart_Full;
-	CS8900_TxLEN = length;
+	REG_WRITE(PP_TxCmd_TxStart_Full, &priv->regs->txcmd);
+	REG_WRITE(length, &priv->regs->txlen);
 
 	/* Test to see if the chip has allocated memory for the packet */
-	if ((get_reg (PP_BusSTAT) & PP_BusSTAT_TxRDY) == 0) {
+	if ((get_reg(dev, PP_BusSTAT) & PP_BusSTAT_TxRDY) == 0) {
 		/* Oops... this should not happen! */
-#ifdef DEBUG
-		printf ("cs: unable to send packet; retrying...\n");
-#endif
-		for (tmo = get_timer (0) + 5 * CONFIG_SYS_HZ; get_timer (0) < tmo;)
+		debug("cs: unable to send packet; retrying...\n");
+		for (tmo = get_timer(0) + 5 * CONFIG_SYS_HZ;
+			get_timer(0) < tmo;)
 			/*NOP*/;
-		eth_reset ();
-		eth_reginit ();
+		cs8900_reset(dev);
+		cs8900_reginit(dev);
 		goto retry;
 	}
 
 	/* Write the contents of the packet */
 	/* assume even number of bytes */
 	for (addr = packet; length > 0; length -= 2)
-		CS8900_RTDATA = *addr++;
+		REG_WRITE(*addr++, &priv->regs->rtdata);
 
 	/* wait for transfer to succeed */
-	tmo = get_timer (0) + 5 * CONFIG_SYS_HZ;
-	while ((s = get_reg (PP_TER) & ~0x1F) == 0) {
-		if (get_timer (0) >= tmo)
+	tmo = get_timer(0) + 5 * CONFIG_SYS_HZ;
+	while ((s = get_reg(dev, PP_TER) & ~0x1F) == 0) {
+		if (get_timer(0) >= tmo)
 			break;
 	}
 
 	/* nothing */ ;
-	if ((s & (PP_TER_CRS | PP_TER_TxOK)) != PP_TER_TxOK) {
-#ifdef DEBUG
-		printf ("\ntransmission error %#x\n", s);
-#endif
+	if((s & (PP_TER_CRS | PP_TER_TxOK)) != PP_TER_TxOK) {
+		debug("\ntransmission error %#x\n", s);
 	}
 
 	return 0;
 }
 
-static void cs8900_e2prom_ready(void)
+static void cs8900_e2prom_ready(struct eth_device *dev)
 {
-	while (get_reg(PP_SelfSTAT) & SI_BUSY)
+	while (get_reg(dev, PP_SelfSTAT) & SI_BUSY)
 		;
 }
 
@@ -259,12 +271,13 @@ static void cs8900_e2prom_ready(void)
 /* read a 16-bit word out of the EEPROM                    */
 /***********************************************************/
 
-int cs8900_e2prom_read(unsigned char addr, unsigned short *value)
+int cs8900_e2prom_read(struct eth_device *dev,
+			u8 addr, u16 *value)
 {
-	cs8900_e2prom_ready();
-	put_reg(PP_EECMD, EEPROM_READ_CMD | addr);
-	cs8900_e2prom_ready();
-	*value = get_reg(PP_EEData);
+	cs8900_e2prom_ready(dev);
+	put_reg(dev, PP_EECMD, EEPROM_READ_CMD | addr);
+	cs8900_e2prom_ready(dev);
+	*value = get_reg(dev, PP_EEData);
 
 	return 0;
 }
@@ -274,16 +287,51 @@ int cs8900_e2prom_read(unsigned char addr, unsigned short *value)
 /* write a 16-bit word into the EEPROM                     */
 /***********************************************************/
 
-int cs8900_e2prom_write(unsigned char addr, unsigned short value)
+int cs8900_e2prom_write(struct eth_device *dev, u8 addr, u16 value)
+{
+	cs8900_e2prom_ready(dev);
+	put_reg(dev, PP_EECMD, EEPROM_WRITE_EN);
+	cs8900_e2prom_ready(dev);
+	put_reg(dev, PP_EEData, value);
+	put_reg(dev, PP_EECMD, EEPROM_WRITE_CMD | addr);
+	cs8900_e2prom_ready(dev);
+	put_reg(dev, PP_EECMD, EEPROM_WRITE_DIS);
+	cs8900_e2prom_ready(dev);
+
+	return 0;
+}
+
+int cs8900_initialize(u8 dev_num, int base_addr)
 {
-	cs8900_e2prom_ready();
-	put_reg(PP_EECMD, EEPROM_WRITE_EN);
-	cs8900_e2prom_ready();
-	put_reg(PP_EEData, value);
-	put_reg(PP_EECMD, EEPROM_WRITE_CMD | addr);
-	cs8900_e2prom_ready();
-	put_reg(PP_EECMD, EEPROM_WRITE_DIS);
-	cs8900_e2prom_ready();
+	struct eth_device *dev;
+	struct cs8900_priv *priv;
+
+	dev = malloc(sizeof(*dev));
+	if (!dev) {
+		free(dev);
+		return 0;
+	}
+	memset(dev, 0, sizeof(*dev));
+
+	priv = malloc(sizeof(*priv));
+	if (!priv) {
+		free(priv);
+		return 0;
+	}
+	memset(priv, 0, sizeof(*priv));
+	priv->regs = (struct cs8900_regs *)base_addr;
+
+	/* Load MAC address from EEPROM */
+	cs8900_get_enetaddr(dev);
+
+	dev->iobase = base_addr;
+	dev->priv = priv;
+	dev->init = cs8900_init;
+	dev->halt = cs8900_halt;
+	dev->send = cs8900_send;
+	dev->recv = cs8900_recv;
+	sprintf(dev->name, "%s-%hu", CS8900_DRIVERNAME, dev_num);
 
+	eth_register(dev);
 	return 0;
 }