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Date: Thu, 30 Dec 2010 23:28:59 +0100
From: Angelo Dureghello <angelo70@...il.com>
To: netdev@...r.kernel.org
Subject: dm9000: adding support for coldfire
Hi all,
i have succesfully working dm9000e with MCF5307 with kernel 2.6.36.2.
If the data bus of the cpu (big endian) is cross-wired to the dm9000, no
addition to actual 1.31 driver should be needed (untested, see patch
comments).
In my case, i wired D0:31 of cpu directly straight to D0:31 of dm9000e.
In case this wiring configuration would be supported, i post this patch.
If this "straight-wiring" will not be considered a supported/standard
way of connectiong to dm9000e, i can cross wire the bus on my board.
Regards,
angelo
*** dm9000.c.orig 2010-12-30 23:19:39.747836070 +0100
--- dm9000.c 2010-12-30 22:50:17.167899041 +0100
***************
*** 48,53 ****
--- 48,74 ----
#define CARDNAME "dm9000"
#define DRV_VERSION "1.31"
+ #ifdef CONFIG_COLDFIRE
+ /**
+ * Coldfire processors are big endian, so to use this driver
+ * without any change wiring should be done crossing the bytes:
+ *
+ * 8 bit mode, D24:31 cpu to D0:7 dm9000
+ * 16 bit mode, D24:31 cpu to D0:7 dm9000
+ * D16:23 cpu to D8:15 dm9000
+ * 32 bit mode, D24:31 cpu to D0:7 dm9000
+ * D16:23 cpu to D8:15 dm9000
+ * D8 :15 cpu to D16:23 dm9000
+ * D0 :7 cpu to D24:31 dm9000
+ *
+ * If the Coldfire bus has been wired straight to dm9000,
+ * following define/patch must be used.
+ *
+ * 32 bit mode, D0:31 straight wired : BE2LE32BIT
+ */
+ #define BE2LE32BIT 1
+ #endif
+
/*
* Transmit timeout, default 5 seconds.
*/
***************
*** 158,166 ****
--- 179,195 ----
dev_dbg(db->dev, "resetting device\n");
/* RESET device */
+ #ifdef BE2LE32BIT
+ writel(DM9000_NCR, db->io_addr);
+ #else
writeb(DM9000_NCR, db->io_addr);
+ #endif
udelay(200);
+ #ifdef BE2LE32BIT
+ writel(NCR_RST, db->io_data);
+ #else
writeb(NCR_RST, db->io_data);
+ #endif
udelay(200);
}
***************
*** 170,177 ****
--- 199,211 ----
static u8
ior(board_info_t * db, int reg)
{
+ #ifdef BE2LE32BIT
+ writel(reg, db->io_addr);
+ return (u8)readl(db->io_data);
+ #else
writeb(reg, db->io_addr);
return readb(db->io_data);
+ #endif
}
/*
***************
*** 181,223 ****
--- 215,310 ----
static void
iow(board_info_t * db, int reg, int value)
{
+ #ifdef BE2LE32BIT
+ writel(reg, db->io_addr);
+ writel(value, db->io_data);
+ #else
writeb(reg, db->io_addr);
writeb(value, db->io_data);
+ #endif
}
/* routines for sending block to chip */
static void dm9000_outblk_8bit(void __iomem *reg, void *data, int count)
{
+ #ifdef CONFIG_COLDFIRE
+ u8 *p=(u8 *)data;
+
+ while (count--)
+ #ifdef BE2LE32BIT
+ writel((int)(*p++), reg);
+ #else
+ writeb(*p++, reg);
+ #endif
+ #else
writesb(reg, data, count);
+ #endif
}
static void dm9000_outblk_16bit(void __iomem *reg, void *data, int count)
{
+ #ifdef CONFIG_COLDFIRE
+ // TO DO
+ #else
writesw(reg, data, (count+1) >> 1);
+ #endif
}
static void dm9000_outblk_32bit(void __iomem *reg, void *data, int count)
{
+ #ifdef CONFIG_COLDFIRE
+ u32 *p = (u32*)data;
+
+ count = (count+3)>>2;
+
+ while (count--)
+ writel(le32_to_cpu(*p++), reg);
+ #else
writesl(reg, data, (count+3) >> 2);
+ #endif
}
/* input block from chip to memory */
static void dm9000_inblk_8bit(void __iomem *reg, void *data, int count)
{
+ #ifdef CONFIG_COLDFIRE
+ u8 *p=data;
+
+ while (count--)
+ *p++ = readb(reg);
+ #else
readsb(reg, data, count);
+ #endif
}
static void dm9000_inblk_16bit(void __iomem *reg, void *data, int count)
{
+ #ifdef CONFIG_COLDFIRE
+ #ifdef BE2LE32BIT
+ /* to do */
+ #else
+ /* to do */
+ #endif
+ #else
readsw(reg, data, (count+1) >> 1);
+ #endif
}
static void dm9000_inblk_32bit(void __iomem *reg, void *data, int count)
{
+ #ifdef CONFIG_COLDFIRE
+ unsigned long *p=data;
+
+ count = (count + 3) >> 2;
+
+ while (count--)
+ *p++ = le32_to_cpu(readl(reg));
+ #else
readsl(reg, data, (count+3) >> 2);
+ #endif
}
/* dump block from chip to null */
***************
*** 228,234 ****
--- 315,325 ----
int tmp;
for (i = 0; i < count; i++)
+ #ifdef BE2LE32BIT
+ tmp = readl(reg);
+ #else
tmp = readb(reg);
+ #endif
}
static void dm9000_dumpblk_16bit(void __iomem *reg, int count)
***************
*** 239,245 ****
--- 330,341 ----
count = (count + 1) >> 1;
for (i = 0; i < count; i++)
+ #ifdef BE2LE32BIT
+ tmp = readl(reg);
+ #else
tmp = readw(reg);
+ #endif
+
}
static void dm9000_dumpblk_32bit(void __iomem *reg, int count)
***************
*** 863,870 ****
netif_wake_queue(dev);
/* Restore previous register address */
writeb(reg_save, db->io_addr);
! spin_unlock_irqrestore(&db->lock, flags);
}
static void dm9000_send_packet(struct net_device *dev,
--- 959,971 ----
netif_wake_queue(dev);
/* Restore previous register address */
+ #ifdef BE2LE32BIT
+ writel(reg_save, db->io_addr);
+ #else
writeb(reg_save, db->io_addr);
! #endif
!
! spin_unlock_irqrestore(&db->lock,flags);
}
static void dm9000_send_packet(struct net_device *dev,
***************
*** 908,914 ****
--- 1009,1019 ----
spin_lock_irqsave(&db->lock, flags);
/* Move data to DM9000 TX RAM */
+ #ifdef BE2LE32BIT
+ writel(DM9000_MWCMD, db->io_addr);
+ #else
writeb(DM9000_MWCMD, db->io_addr);
+ #endif
(db->outblk)(db->io_data, skb->data, skb->len);
dev->stats.tx_bytes += skb->len;
***************
*** 981,987 ****
ior(db, DM9000_MRCMDX); /* Dummy read */
/* Get most updated data */
! rxbyte = readb(db->io_data);
/* Status check: this byte must be 0 or 1 */
if (rxbyte & DM9000_PKT_ERR) {
--- 1086,1096 ----
ior(db, DM9000_MRCMDX); /* Dummy read */
/* Get most updated data */
! #ifdef BE2LE32BIT
! rxbyte = (u8)readl(db->io_data);
! #else
! rxbyte = readb(db->io_data);
! #endif
/* Status check: this byte must be 0 or 1 */
if (rxbyte & DM9000_PKT_ERR) {
***************
*** 996,1003 ****
/* A packet ready now & Get status/length */
GoodPacket = true;
- writeb(DM9000_MRCMD, db->io_addr);
(db->inblk)(db->io_data, &rxhdr, sizeof(rxhdr));
RxLen = le16_to_cpu(rxhdr.RxLen);
--- 1105,1117 ----
/* A packet ready now & Get status/length */
GoodPacket = true;
+ #ifdef BE2LE32BIT
+ writel(DM9000_MRCMD, db->io_addr);
+ #else
+ writeb(DM9000_MRCMD, db->io_addr);
+ #endif
+
(db->inblk)(db->io_data, &rxhdr, sizeof(rxhdr));
RxLen = le16_to_cpu(rxhdr.RxLen);
***************
*** 1077,1083 ****
unsigned long flags;
u8 reg_save;
! dm9000_dbg(db, 3, "entering %s\n", __func__);
/* A real interrupt coming */
--- 1191,1197 ----
unsigned long flags;
u8 reg_save;
! //dm9000_dbg(db, 3, "entering %s\n", __func__);
/* A real interrupt coming */
***************
*** 1085,1091 ****
spin_lock_irqsave(&db->lock, flags);
/* Save previous register address */
! reg_save = readb(db->io_addr);
/* Disable all interrupts */
iow(db, DM9000_IMR, IMR_PAR);
--- 1199,1209 ----
spin_lock_irqsave(&db->lock, flags);
/* Save previous register address */
! #ifdef BE2LE32BIT
! reg_save = (u8)readl(db->io_addr);
! #else
! reg_save = readb(db->io_addr);
! #endif
/* Disable all interrupts */
iow(db, DM9000_IMR, IMR_PAR);
***************
*** 1100,1106 ****
/* Received the coming packet */
if (int_status & ISR_PRS)
dm9000_rx(dev);
!
/* Trnasmit Interrupt check */
if (int_status & ISR_PTS)
dm9000_tx_done(dev, db);
--- 1218,1224 ----
/* Received the coming packet */
if (int_status & ISR_PRS)
dm9000_rx(dev);
!
/* Trnasmit Interrupt check */
if (int_status & ISR_PTS)
dm9000_tx_done(dev, db);
***************
*** 1116,1123 ****
iow(db, DM9000_IMR, db->imr_all);
/* Restore previous register address */
writeb(reg_save, db->io_addr);
!
spin_unlock_irqrestore(&db->lock, flags);
return IRQ_HANDLED;
--- 1234,1245 ----
iow(db, DM9000_IMR, db->imr_all);
/* Restore previous register address */
+ #ifdef BE2LE32BIT
+ writel(reg_save, db->io_addr);
+ #else
writeb(reg_save, db->io_addr);
! #endif
!
spin_unlock_irqrestore(&db->lock, flags);
return IRQ_HANDLED;
***************
*** 1233,1243 ****
int ret;
mutex_lock(&db->addr_lock);
!
spin_lock_irqsave(&db->lock,flags);
/* Save previous register address */
! reg_save = readb(db->io_addr);
/* Fill the phyxcer register into REG_0C */
iow(db, DM9000_EPAR, DM9000_PHY | reg);
--- 1355,1369 ----
int ret;
mutex_lock(&db->addr_lock);
!
spin_lock_irqsave(&db->lock,flags);
/* Save previous register address */
! #ifdef BE2LE32BIT
! reg_save = (u8)readl(db->io_addr);
! #else
! reg_save = readb(db->io_addr);
! #endif
/* Fill the phyxcer register into REG_0C */
iow(db, DM9000_EPAR, DM9000_PHY | reg);
***************
*** 1250,1256 ****
dm9000_msleep(db, 1); /* Wait read complete */
spin_lock_irqsave(&db->lock,flags);
! reg_save = readb(db->io_addr);
iow(db, DM9000_EPCR, 0x0); /* Clear phyxcer read command */
--- 1376,1386 ----
dm9000_msleep(db, 1); /* Wait read complete */
spin_lock_irqsave(&db->lock,flags);
! #ifdef BE2LE32BIT
! reg_save = (u8)readl(db->io_addr);
! #else
! reg_save = readb(db->io_addr);
! #endif
iow(db, DM9000_EPCR, 0x0); /* Clear phyxcer read command */
***************
*** 1258,1266 ****
ret = (ior(db, DM9000_EPDRH) << 8) | ior(db, DM9000_EPDRL);
/* restore the previous address */
writeb(reg_save, db->io_addr);
! spin_unlock_irqrestore(&db->lock,flags);
mutex_unlock(&db->addr_lock);
dm9000_dbg(db, 5, "phy_read[%02x] -> %04x\n", reg, ret);
--- 1388,1401 ----
ret = (ior(db, DM9000_EPDRH) << 8) | ior(db, DM9000_EPDRL);
/* restore the previous address */
+ #ifdef BE2LE32BIT
+ writel(reg_save, db->io_addr);
+ #else
writeb(reg_save, db->io_addr);
! #endif
+ spin_unlock_irqrestore(&db->lock,flags);
+
mutex_unlock(&db->addr_lock);
dm9000_dbg(db, 5, "phy_read[%02x] -> %04x\n", reg, ret);
***************
*** 1284,1290 ****
spin_lock_irqsave(&db->lock,flags);
/* Save previous register address */
! reg_save = readb(db->io_addr);
/* Fill the phyxcer register into REG_0C */
iow(db, DM9000_EPAR, DM9000_PHY | reg);
--- 1419,1429 ----
spin_lock_irqsave(&db->lock,flags);
/* Save previous register address */
! #ifdef BE2LE32BIT
! reg_save = (u8)readl(db->io_addr);
! #else
! reg_save = readb(db->io_addr);
! #endif
/* Fill the phyxcer register into REG_0C */
iow(db, DM9000_EPAR, DM9000_PHY | reg);
***************
*** 1295,1312 ****
iow(db, DM9000_EPCR, EPCR_EPOS | EPCR_ERPRW); /* Issue phyxcer
write command */
writeb(reg_save, db->io_addr);
spin_unlock_irqrestore(&db->lock, flags);
dm9000_msleep(db, 1); /* Wait write complete */
spin_lock_irqsave(&db->lock,flags);
! reg_save = readb(db->io_addr);
iow(db, DM9000_EPCR, 0x0); /* Clear phyxcer write command */
/* restore the previous address */
writeb(reg_save, db->io_addr);
spin_unlock_irqrestore(&db->lock, flags);
mutex_unlock(&db->addr_lock);
--- 1434,1464 ----
iow(db, DM9000_EPCR, EPCR_EPOS | EPCR_ERPRW); /* Issue phyxcer
write command */
+ #ifdef BE2LE32BIT
+ writel(reg_save, db->io_addr);
+ #else
writeb(reg_save, db->io_addr);
+ #endif
+
spin_unlock_irqrestore(&db->lock, flags);
dm9000_msleep(db, 1); /* Wait write complete */
spin_lock_irqsave(&db->lock,flags);
! #ifdef BE2LE32BIT
! reg_save = (u8)readl(db->io_addr);
! #else
! reg_save = readb(db->io_addr);
! #endif
iow(db, DM9000_EPCR, 0x0); /* Clear phyxcer write command */
/* restore the previous address */
+ #ifdef BE2LE32BIT
+ writel(reg_save, db->io_addr);
+ #else
writeb(reg_save, db->io_addr);
+ #endif
spin_unlock_irqrestore(&db->lock, flags);
mutex_unlock(&db->addr_lock);
--
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