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Subject[PATCH] Olympic driver
A small update to the olympic driver. 

This fixes a bug introduced in the last update that will panic the
kernel if the wrong options are chosen, corrects some read/write
alignments for 64bit ppc and adds code to start up the cardbus adapters
correctly.

The patch applies cleanly to 2.5.39 as well.

Mike Phillips
Linux Token Ring Project
http://www.linuxtr.net


diff -urN -X dontdiff linux-2.4.20-pre7-ac3.orig/drivers/net/tokenring/olympic.c linux-2.4.20-pre7-ac3/drivers/net/tokenring/olympic.c
--- linux-2.4.20-pre7-ac3.orig/drivers/net/tokenring/olympic.c 2002-09-22 17:10:00.000000000 -0500
+++ linux-2.4.20-pre7-ac3/drivers/net/tokenring/olympic.c 2002-09-22 14:12:56.000000000 -0500
@@ -56,8 +56,15 @@
* 07/19/01 - Improve bad LAA reporting, strip out freemem
* into a separate function, its called from 3
* different places now.
- * 02/09/01 - Replaced sleep_on.
- *
+ * 02/09/02 - Replaced sleep_on.
+ * 03/01/02 - Replace access to several registers from 32 bit to
+ * 16 bit. Fixes alignment errors on PPC 64 bit machines.
+ * Thanks to Al Trautman for this one.
+ * 03/10/02 - Fix BUG in arb_cmd. Bug was there all along but was
+ * silently ignored until the error checking code
+ * went into version 1.0.0
+ * 06/04/02 - Add correct start up sequence for the cardbus adapters.
+ * Required for strict compliance with pci power mgmt specs.
* To Do:
*
* Wake on lan
@@ -111,7 +118,7 @@
*/

static char version[] __devinitdata =
-"Olympic.c v1.0.0 2/9/02 - Peter De Schrijver & Mike Phillips" ;
+"Olympic.c v1.0.5 6/04/02 - Peter De Schrijver & Mike Phillips" ;

static char *open_maj_error[] = {"No error", "Lobe Media Test", "Physical Insertion",
"Address Verification", "Neighbor Notification (Ring Poll)",
@@ -296,9 +303,10 @@
spin_lock_init(&olympic_priv->olympic_lock) ;

/* Needed for cardbus */
- if(!(readl(olympic_mmio+BCTL) & BCTL_MODE_INDICATOR))
+ if(!(readl(olympic_mmio+BCTL) & BCTL_MODE_INDICATOR)) {
writel(readl(olympic_priv->olympic_mmio+FERMASK)|FERMASK_INT_BIT, olympic_mmio+FERMASK);
-
+ }
+
#if OLYMPIC_DEBUG
printk("BCTL: %x\n",readl(olympic_mmio+BCTL));
printk("GPR: %x\n",readw(olympic_mmio+GPR));
@@ -311,24 +319,42 @@
writel(readl(olympic_mmio+BCTL)|BCTL_MIMREB,olympic_mmio+BCTL);

if (olympic_priv->olympic_ring_speed == 0) { /* Autosense */
- writel(readl(olympic_mmio+GPR)|GPR_AUTOSENSE,olympic_mmio+GPR);
+ writew(readw(olympic_mmio+GPR)|GPR_AUTOSENSE,olympic_mmio+GPR);
if (olympic_priv->olympic_message_level)
printk(KERN_INFO "%s: Ringspeed autosense mode on\n",olympic_priv->olympic_card_name);
} else if (olympic_priv->olympic_ring_speed == 16) {
if (olympic_priv->olympic_message_level)
printk(KERN_INFO "%s: Trying to open at 16 Mbps as requested\n", olympic_priv->olympic_card_name);
- writel(GPR_16MBPS, olympic_mmio+GPR);
+ writew(GPR_16MBPS, olympic_mmio+GPR);
} else if (olympic_priv->olympic_ring_speed == 4) {
if (olympic_priv->olympic_message_level)
printk(KERN_INFO "%s: Trying to open at 4 Mbps as requested\n", olympic_priv->olympic_card_name) ;
- writel(0, olympic_mmio+GPR);
+ writew(0, olympic_mmio+GPR);
}

- writel(readl(olympic_mmio+GPR)|GPR_NEPTUNE_BF,olympic_mmio+GPR);
+ writew(readw(olympic_mmio+GPR)|GPR_NEPTUNE_BF,olympic_mmio+GPR);

#if OLYMPIC_DEBUG
printk("GPR = %x\n",readw(olympic_mmio + GPR) ) ;
#endif
+ /* Solo has been paused to meet the Cardbus power
+ * specs if the adapter is cardbus. Check to
+ * see its been paused and then restart solo. The
+ * adapter should set the pause bit within 1 second.
+ */
+
+ if(!(readl(olympic_mmio+BCTL) & BCTL_MODE_INDICATOR)) {
+ t=jiffies;
+ while (!readl(olympic_mmio+CLKCTL) & CLKCTL_PAUSE) {
+ schedule() ;
+ if(jiffies-t > 2*HZ) {
+ printk(KERN_ERR "IBM Cardbus tokenring adapter not responsing.\n") ;
+ return -ENODEV;
+ }
+ }
+ writel(readl(olympic_mmio+CLKCTL) & ~CLKCTL_PAUSE, olympic_mmio+CLKCTL) ;
+ }
+
/* start solo init */
writel((1<<15),olympic_mmio+SISR_MASK_SUM);

@@ -341,13 +367,13 @@
}
}

- writel(readl(olympic_mmio+LAPWWO),olympic_mmio+LAPA);
+ writel(readw(olympic_mmio+LAPWWO),olympic_mmio+LAPA);

#if OLYMPIC_DEBUG
printk("LAPWWO: %x, LAPA: %x\n",readl(olympic_mmio+LAPWWO), readl(olympic_mmio+LAPA));
#endif

- init_srb=olympic_priv->olympic_lap + ((readl(olympic_mmio+LAPWWO)) & (~0xf800));
+ init_srb=olympic_priv->olympic_lap + ((readw(olympic_mmio+LAPWWO)) & (~0xf800));

#if OLYMPIC_DEBUG
{
@@ -422,11 +448,11 @@

/* adapter is closed, so SRB is pointed to by LAPWWO */

- writel(readl(olympic_mmio+LAPWWO),olympic_mmio+LAPA);
- init_srb=olympic_priv->olympic_lap + ((readl(olympic_mmio+LAPWWO)) & (~0xf800));
+ writel(readw(olympic_mmio+LAPWWO),olympic_mmio+LAPA);
+ init_srb=olympic_priv->olympic_lap + ((readw(olympic_mmio+LAPWWO)) & (~0xf800));

#if OLYMPIC_DEBUG
- printk("LAPWWO: %x, LAPA: %x\n",readl(olympic_mmio+LAPWWO), readl(olympic_mmio+LAPA));
+ printk("LAPWWO: %x, LAPA: %x\n",readw(olympic_mmio+LAPWWO), readl(olympic_mmio+LAPA));
printk("SISR Mask = %04x\n", readl(olympic_mmio+SISR_MASK));
printk("Before the open command \n");
#endif
@@ -486,7 +512,7 @@
olympic_priv->srb_queued=0;
break;
}
- if ((jiffies-t) > 60*HZ) {
+ if ((jiffies-t) > 10*HZ) {
printk(KERN_WARNING "%s: SRB timed out. \n",dev->name) ;
olympic_priv->srb_queued=0;
break ;
@@ -495,7 +521,7 @@
}
remove_wait_queue(&olympic_priv->srb_wait,&wait) ;
set_current_state(TASK_RUNNING) ;
-
+ olympic_priv->srb_queued = 0 ;
#if OLYMPIC_DEBUG
printk("init_srb(%p): ",init_srb);
for(i=0;i<20;i++)
@@ -629,7 +655,8 @@
printk(" stat_ring[7]: %p\n", &(olympic_priv->olympic_rx_status_ring[7]) );

printk("RXCDA: %x, rx_ring[0]: %p\n",readl(olympic_mmio+RXCDA),&olympic_priv->olympic_rx_ring[0]);
- printk("Rx_ring_dma_addr = %08x, rx_status_dma_addr = %08x\n",olympic_priv->rx_ring_dma_addr,olympic_priv->rx_status_ring_dma_addr) ;
+ printk("Rx_ring_dma_addr = %08x, rx_status_dma_addr =
+%08x\n",olympic_priv->rx_ring_dma_addr,olympic_priv->rx_status_ring_dma_addr) ;
#endif

writew((((readw(olympic_mmio+RXENQ)) & 0x8000) ^ 0x8000) | i,olympic_mmio+RXENQ);
@@ -790,7 +817,7 @@
first. Ideally all frames would be in a single buffer, this can be tuned by
altering the buffer size. If the length of the packet is less than
1500 bytes we're going to copy it over anyway to stop packets getting
- dropped from sockets with buffers small than our pkt_buf_sz. */
+ dropped from sockets with buffers smaller than our pkt_buf_sz. */

if (buffer_cnt==1) {
olympic_priv->rx_ring_last_received++ ;
@@ -1097,10 +1124,13 @@
writel(readl(olympic_mmio+BCTL)&~(3<<13),olympic_mmio+BCTL);

#if OLYMPIC_DEBUG
+ {
+ int i ;
printk("srb(%p): ",srb);
for(i=0;i<4;i++)
printk("%x ",readb(srb+i));
printk("\n");
+ }
#endif
free_irq(dev->irq,dev);

@@ -1369,8 +1399,7 @@
arb_block = (u8 *)(olympic_priv->olympic_lap + olympic_priv->arb) ;
asb_block = (u8 *)(olympic_priv->olympic_lap + olympic_priv->asb) ;
srb = (u8 *)(olympic_priv->olympic_lap + olympic_priv->srb) ;
- writel(readl(olympic_mmio+LAPA),olympic_mmio+LAPWWO);
-
+
if (readb(arb_block+0) == ARB_RECEIVE_DATA) { /* Receive.data, MAC frames */

header_len = readb(arb_block+8) ; /* 802.5 Token-Ring Header Length */
@@ -1423,7 +1452,7 @@
/* Now tell the card we have dealt with the received frame */

/* Set LISR Bit 1 */
- writel(LISR_ARB_FREE,olympic_priv->olympic_lap + LISR_SUM);
+ writel(LISR_ARB_FREE,olympic_priv->olympic_mmio + LISR_SUM);

/* Is the ASB free ? */

diff -urN -X dontdiff linux-2.4.20-pre7-ac3.orig/drivers/net/tokenring/olympic.h linux-2.4.20-pre7-ac3/drivers/net/tokenring/olympic.h
--- linux-2.4.20-pre7-ac3.orig/drivers/net/tokenring/olympic.h 2002-08-02 19:39:44.000000000 -0500
+++ linux-2.4.20-pre7-ac3/drivers/net/tokenring/olympic.h 2002-09-22 14:12:56.000000000 -0500
@@ -91,6 +91,7 @@
#define TIMER 0x50

#define CLKCTL 0x74
+#define CLKCTL_PAUSE (1<<15)

#define PM_CON 0x4

-
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