This patch adds support for using the LL TEMAC Ethernet driver on
non-Virtex 5 platforms by adding support for accessing the Soft DMA
registers as if they were memory mapped instead of solely through the
DCR's (available on the Virtex 5).
Signed-off-by: John Tyner <jty...@cs.ucr.edu>
--- /tmp/tmp.5198.41 2010-02-01 15:04:45.000000000 -0800
+++ ./linux-2.6.32.3/drivers/net/ll_temac.h 2010-01-28 15:06:17.000000000 -0800
@@ -338,6 +338,7 @@
/* IO registers and IRQs */
void __iomem *regs;
dcr_host_t sdma_dcrs;
+ u32 __iomem *sdma_regs;
int tx_irq;
int rx_irq;
int emac_num;
--- /tmp/tmp.5198.53 2010-02-01 15:04:45.000000000 -0800
+++ ./linux-2.6.32.3/drivers/net/ll_temac_main.c 2010-02-01 15:04:01.000000000 -0800
@@ -20,9 +20,6 @@
* or rx, so this should be okay.
*
* TODO:
- * - Fix driver to work on more than just Virtex5. Right now the driver
- * assumes that the locallink DMA registers are accessed via DCR
- * instructions.
* - Factor out locallink DMA code into separate driver
* - Fix multicast assignment.
* - Fix support for hardware checksumming.
@@ -117,12 +114,20 @@
static u32 temac_dma_in32(struct temac_local *lp, int reg)
{
- return dcr_read(lp->sdma_dcrs, reg);
+ if (lp->sdma_regs) {
+ return __raw_readl(lp->sdma_regs + reg);
+ } else {
+ return dcr_read(lp->sdma_dcrs, reg);
+ }
}
static void temac_dma_out32(struct temac_local *lp, int reg, u32 value)
{
- dcr_write(lp->sdma_dcrs, reg, value);
+ if (lp->sdma_regs) {
+ __raw_writel(value, lp->sdma_regs + reg);
+ } else {
+ dcr_write(lp->sdma_dcrs, reg, value);
+ }
}
/**
@@ -862,13 +867,17 @@
goto nodev;
}
- dcrs = dcr_resource_start(np, 0);
- if (dcrs == 0) {
- dev_err(&op->dev, "could not get DMA register address\n");
+ lp->sdma_regs = NULL;
+
+ if ((dcrs = dcr_resource_start(np, 0)) != 0) {
+ lp->sdma_dcrs = dcr_map(np, dcrs, dcr_resource_len(np, 0));
+ dev_dbg(&op->dev, "DCR base: %x\n", dcrs);
+ } else if ((lp->sdma_regs = of_iomap(np, 0))) {
+ dev_dbg(&op->dev, "MEM base: %p\n", lp->sdma_regs);
+ } else {
+ dev_err(&op->dev, "unable to map DMA registers\n");
goto nodev;
}
- lp->sdma_dcrs = dcr_map(np, dcrs, dcr_resource_len(np, 0));
- dev_dbg(&op->dev, "DCR base: %x\n", dcrs);
lp->rx_irq = irq_of_parse_and_map(np, 0);
lp->tx_irq = irq_of_parse_and_map(np, 1);
@@ -895,7 +904,7 @@
lp->phy_node = of_parse_phandle(op->node, "phy-handle", 0);
if (lp->phy_node)
- dev_dbg(lp->dev, "using PHY node %s (%p)\n", np->full_name, np);
+ dev_dbg(lp->dev, "using PHY node %s (%p)\n", lp->phy_node->full_name, lp->phy_node);
/* Add the device attributes */
rc = sysfs_create_group(&lp->dev->kobj, &temac_attr_group);
_______________________________________________
Linuxppc-dev mailing list
Linuxppc-dev@lists.ozlabs.org
https://lists.ozlabs.org/listinfo/linuxppc-dev
