378 lines
10 KiB
C
378 lines
10 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
#include <linux/module.h>
|
|
#include <linux/netdevice.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/zorro.h>
|
|
#include <net/ax88796.h>
|
|
#include <asm/amigaints.h>
|
|
|
|
#define ZORRO_PROD_INDIVIDUAL_COMPUTERS_X_SURF100 \
|
|
ZORRO_ID(INDIVIDUAL_COMPUTERS, 0x64, 0)
|
|
|
|
#define XS100_IRQSTATUS_BASE 0x40
|
|
#define XS100_8390_BASE 0x800
|
|
|
|
/* Longword-access area. Translated to 2 16-bit access cycles by the
|
|
* X-Surf 100 FPGA
|
|
*/
|
|
#define XS100_8390_DATA32_BASE 0x8000
|
|
#define XS100_8390_DATA32_SIZE 0x2000
|
|
/* Sub-Areas for fast data register access; addresses relative to area begin */
|
|
#define XS100_8390_DATA_READ32_BASE 0x0880
|
|
#define XS100_8390_DATA_WRITE32_BASE 0x0C80
|
|
#define XS100_8390_DATA_AREA_SIZE 0x80
|
|
|
|
/* force unsigned long back to 'void __iomem *' */
|
|
#define ax_convert_addr(_a) ((void __force __iomem *)(_a))
|
|
|
|
#define ei_inb(_a) z_readb(ax_convert_addr(_a))
|
|
#define ei_outb(_v, _a) z_writeb(_v, ax_convert_addr(_a))
|
|
|
|
#define ei_inw(_a) z_readw(ax_convert_addr(_a))
|
|
#define ei_outw(_v, _a) z_writew(_v, ax_convert_addr(_a))
|
|
|
|
#define ei_inb_p(_a) ei_inb(_a)
|
|
#define ei_outb_p(_v, _a) ei_outb(_v, _a)
|
|
|
|
/* define EI_SHIFT() to take into account our register offsets */
|
|
#define EI_SHIFT(x) (ei_local->reg_offset[(x)])
|
|
|
|
/* Ensure we have our RCR base value */
|
|
#define AX88796_PLATFORM
|
|
|
|
#include "8390.h"
|
|
|
|
/* from ne.c */
|
|
#define NE_CMD EI_SHIFT(0x00)
|
|
#define NE_RESET EI_SHIFT(0x1f)
|
|
#define NE_DATAPORT EI_SHIFT(0x10)
|
|
|
|
struct xsurf100_ax_plat_data {
|
|
struct ax_plat_data ax;
|
|
void __iomem *base_regs;
|
|
void __iomem *data_area;
|
|
};
|
|
|
|
static int is_xsurf100_network_irq(struct platform_device *pdev)
|
|
{
|
|
struct xsurf100_ax_plat_data *xs100 = dev_get_platdata(&pdev->dev);
|
|
|
|
return (readw(xs100->base_regs + XS100_IRQSTATUS_BASE) & 0xaaaa) != 0;
|
|
}
|
|
|
|
/* These functions guarantee that the iomem is accessed with 32 bit
|
|
* cycles only. z_memcpy_fromio / z_memcpy_toio don't
|
|
*/
|
|
static void z_memcpy_fromio32(void *dst, const void __iomem *src, size_t bytes)
|
|
{
|
|
while (bytes > 32) {
|
|
asm __volatile__
|
|
("movem.l (%0)+,%%d0-%%d7\n"
|
|
"movem.l %%d0-%%d7,(%1)\n"
|
|
"adda.l #32,%1" : "=a"(src), "=a"(dst)
|
|
: "0"(src), "1"(dst) : "d0", "d1", "d2", "d3", "d4",
|
|
"d5", "d6", "d7", "memory");
|
|
bytes -= 32;
|
|
}
|
|
while (bytes) {
|
|
*(uint32_t *)dst = z_readl(src);
|
|
src += 4;
|
|
dst += 4;
|
|
bytes -= 4;
|
|
}
|
|
}
|
|
|
|
static void z_memcpy_toio32(void __iomem *dst, const void *src, size_t bytes)
|
|
{
|
|
while (bytes) {
|
|
z_writel(*(const uint32_t *)src, dst);
|
|
src += 4;
|
|
dst += 4;
|
|
bytes -= 4;
|
|
}
|
|
}
|
|
|
|
static void xs100_write(struct net_device *dev, const void *src,
|
|
unsigned int count)
|
|
{
|
|
struct ei_device *ei_local = netdev_priv(dev);
|
|
struct platform_device *pdev = to_platform_device(dev->dev.parent);
|
|
struct xsurf100_ax_plat_data *xs100 = dev_get_platdata(&pdev->dev);
|
|
|
|
/* copy whole blocks */
|
|
while (count > XS100_8390_DATA_AREA_SIZE) {
|
|
z_memcpy_toio32(xs100->data_area +
|
|
XS100_8390_DATA_WRITE32_BASE, src,
|
|
XS100_8390_DATA_AREA_SIZE);
|
|
src += XS100_8390_DATA_AREA_SIZE;
|
|
count -= XS100_8390_DATA_AREA_SIZE;
|
|
}
|
|
/* copy whole dwords */
|
|
z_memcpy_toio32(xs100->data_area + XS100_8390_DATA_WRITE32_BASE,
|
|
src, count & ~3);
|
|
src += count & ~3;
|
|
if (count & 2) {
|
|
ei_outw(*(uint16_t *)src, ei_local->mem + NE_DATAPORT);
|
|
src += 2;
|
|
}
|
|
if (count & 1)
|
|
ei_outb(*(uint8_t *)src, ei_local->mem + NE_DATAPORT);
|
|
}
|
|
|
|
static void xs100_read(struct net_device *dev, void *dst, unsigned int count)
|
|
{
|
|
struct ei_device *ei_local = netdev_priv(dev);
|
|
struct platform_device *pdev = to_platform_device(dev->dev.parent);
|
|
struct xsurf100_ax_plat_data *xs100 = dev_get_platdata(&pdev->dev);
|
|
|
|
/* copy whole blocks */
|
|
while (count > XS100_8390_DATA_AREA_SIZE) {
|
|
z_memcpy_fromio32(dst, xs100->data_area +
|
|
XS100_8390_DATA_READ32_BASE,
|
|
XS100_8390_DATA_AREA_SIZE);
|
|
dst += XS100_8390_DATA_AREA_SIZE;
|
|
count -= XS100_8390_DATA_AREA_SIZE;
|
|
}
|
|
/* copy whole dwords */
|
|
z_memcpy_fromio32(dst, xs100->data_area + XS100_8390_DATA_READ32_BASE,
|
|
count & ~3);
|
|
dst += count & ~3;
|
|
if (count & 2) {
|
|
*(uint16_t *)dst = ei_inw(ei_local->mem + NE_DATAPORT);
|
|
dst += 2;
|
|
}
|
|
if (count & 1)
|
|
*(uint8_t *)dst = ei_inb(ei_local->mem + NE_DATAPORT);
|
|
}
|
|
|
|
/* Block input and output, similar to the Crynwr packet driver. If
|
|
* you are porting to a new ethercard, look at the packet driver
|
|
* source for hints. The NEx000 doesn't share the on-board packet
|
|
* memory -- you have to put the packet out through the "remote DMA"
|
|
* dataport using ei_outb.
|
|
*/
|
|
static void xs100_block_input(struct net_device *dev, int count,
|
|
struct sk_buff *skb, int ring_offset)
|
|
{
|
|
struct ei_device *ei_local = netdev_priv(dev);
|
|
void __iomem *nic_base = ei_local->mem;
|
|
char *buf = skb->data;
|
|
|
|
if (ei_local->dmaing) {
|
|
netdev_err(dev,
|
|
"DMAing conflict in %s [DMAstat:%d][irqlock:%d]\n",
|
|
__func__,
|
|
ei_local->dmaing, ei_local->irqlock);
|
|
return;
|
|
}
|
|
|
|
ei_local->dmaing |= 0x01;
|
|
|
|
ei_outb(E8390_NODMA + E8390_PAGE0 + E8390_START, nic_base + NE_CMD);
|
|
ei_outb(count & 0xff, nic_base + EN0_RCNTLO);
|
|
ei_outb(count >> 8, nic_base + EN0_RCNTHI);
|
|
ei_outb(ring_offset & 0xff, nic_base + EN0_RSARLO);
|
|
ei_outb(ring_offset >> 8, nic_base + EN0_RSARHI);
|
|
ei_outb(E8390_RREAD + E8390_START, nic_base + NE_CMD);
|
|
|
|
xs100_read(dev, buf, count);
|
|
|
|
ei_local->dmaing &= ~1;
|
|
}
|
|
|
|
static void xs100_block_output(struct net_device *dev, int count,
|
|
const unsigned char *buf, const int start_page)
|
|
{
|
|
struct ei_device *ei_local = netdev_priv(dev);
|
|
void __iomem *nic_base = ei_local->mem;
|
|
unsigned long dma_start;
|
|
|
|
/* Round the count up for word writes. Do we need to do this?
|
|
* What effect will an odd byte count have on the 8390? I
|
|
* should check someday.
|
|
*/
|
|
if (ei_local->word16 && (count & 0x01))
|
|
count++;
|
|
|
|
/* This *shouldn't* happen. If it does, it's the last thing
|
|
* you'll see
|
|
*/
|
|
if (ei_local->dmaing) {
|
|
netdev_err(dev,
|
|
"DMAing conflict in %s [DMAstat:%d][irqlock:%d]\n",
|
|
__func__,
|
|
ei_local->dmaing, ei_local->irqlock);
|
|
return;
|
|
}
|
|
|
|
ei_local->dmaing |= 0x01;
|
|
/* We should already be in page 0, but to be safe... */
|
|
ei_outb(E8390_PAGE0 + E8390_START + E8390_NODMA, nic_base + NE_CMD);
|
|
|
|
ei_outb(ENISR_RDC, nic_base + EN0_ISR);
|
|
|
|
/* Now the normal output. */
|
|
ei_outb(count & 0xff, nic_base + EN0_RCNTLO);
|
|
ei_outb(count >> 8, nic_base + EN0_RCNTHI);
|
|
ei_outb(0x00, nic_base + EN0_RSARLO);
|
|
ei_outb(start_page, nic_base + EN0_RSARHI);
|
|
|
|
ei_outb(E8390_RWRITE + E8390_START, nic_base + NE_CMD);
|
|
|
|
xs100_write(dev, buf, count);
|
|
|
|
dma_start = jiffies;
|
|
|
|
while ((ei_inb(nic_base + EN0_ISR) & ENISR_RDC) == 0) {
|
|
if (jiffies - dma_start > 2 * HZ / 100) { /* 20ms */
|
|
netdev_warn(dev, "timeout waiting for Tx RDC.\n");
|
|
ei_local->reset_8390(dev);
|
|
ax_NS8390_reinit(dev);
|
|
break;
|
|
}
|
|
}
|
|
|
|
ei_outb(ENISR_RDC, nic_base + EN0_ISR); /* Ack intr. */
|
|
ei_local->dmaing &= ~0x01;
|
|
}
|
|
|
|
static int xsurf100_probe(struct zorro_dev *zdev,
|
|
const struct zorro_device_id *ent)
|
|
{
|
|
struct platform_device *pdev;
|
|
struct xsurf100_ax_plat_data ax88796_data;
|
|
struct resource res[2] = {
|
|
DEFINE_RES_NAMED(IRQ_AMIGA_PORTS, 1, NULL,
|
|
IORESOURCE_IRQ | IORESOURCE_IRQ_SHAREABLE),
|
|
DEFINE_RES_MEM(zdev->resource.start + XS100_8390_BASE,
|
|
4 * 0x20)
|
|
};
|
|
int reg;
|
|
/* This table is referenced in the device structure, so it must
|
|
* outlive the scope of xsurf100_probe.
|
|
*/
|
|
static u32 reg_offsets[32];
|
|
int ret = 0;
|
|
|
|
/* X-Surf 100 control and 32 bit ring buffer data access areas.
|
|
* These resources are not used by the ax88796 driver, so must
|
|
* be requested here and passed via platform data.
|
|
*/
|
|
|
|
if (!request_mem_region(zdev->resource.start, 0x100, zdev->name)) {
|
|
dev_err(&zdev->dev, "cannot reserve X-Surf 100 control registers\n");
|
|
return -ENXIO;
|
|
}
|
|
|
|
if (!request_mem_region(zdev->resource.start +
|
|
XS100_8390_DATA32_BASE,
|
|
XS100_8390_DATA32_SIZE,
|
|
"X-Surf 100 32-bit data access")) {
|
|
dev_err(&zdev->dev, "cannot reserve 32-bit area\n");
|
|
ret = -ENXIO;
|
|
goto exit_req;
|
|
}
|
|
|
|
for (reg = 0; reg < 0x20; reg++)
|
|
reg_offsets[reg] = 4 * reg;
|
|
|
|
memset(&ax88796_data, 0, sizeof(ax88796_data));
|
|
ax88796_data.ax.flags = AXFLG_HAS_EEPROM;
|
|
ax88796_data.ax.wordlength = 2;
|
|
ax88796_data.ax.dcr_val = 0x48;
|
|
ax88796_data.ax.rcr_val = 0x40;
|
|
ax88796_data.ax.reg_offsets = reg_offsets;
|
|
ax88796_data.ax.check_irq = is_xsurf100_network_irq;
|
|
ax88796_data.base_regs = ioremap(zdev->resource.start, 0x100);
|
|
|
|
/* error handling for ioremap regs */
|
|
if (!ax88796_data.base_regs) {
|
|
dev_err(&zdev->dev, "Cannot ioremap area %pR (registers)\n",
|
|
&zdev->resource);
|
|
|
|
ret = -ENXIO;
|
|
goto exit_req2;
|
|
}
|
|
|
|
ax88796_data.data_area = ioremap(zdev->resource.start +
|
|
XS100_8390_DATA32_BASE, XS100_8390_DATA32_SIZE);
|
|
|
|
/* error handling for ioremap data */
|
|
if (!ax88796_data.data_area) {
|
|
dev_err(&zdev->dev,
|
|
"Cannot ioremap area %pR offset %x (32-bit access)\n",
|
|
&zdev->resource, XS100_8390_DATA32_BASE);
|
|
|
|
ret = -ENXIO;
|
|
goto exit_mem;
|
|
}
|
|
|
|
ax88796_data.ax.block_output = xs100_block_output;
|
|
ax88796_data.ax.block_input = xs100_block_input;
|
|
|
|
pdev = platform_device_register_resndata(&zdev->dev, "ax88796",
|
|
zdev->slotaddr, res, 2,
|
|
&ax88796_data,
|
|
sizeof(ax88796_data));
|
|
|
|
if (IS_ERR(pdev)) {
|
|
dev_err(&zdev->dev, "cannot register platform device\n");
|
|
ret = -ENXIO;
|
|
goto exit_mem2;
|
|
}
|
|
|
|
zorro_set_drvdata(zdev, pdev);
|
|
|
|
if (!ret)
|
|
return 0;
|
|
|
|
exit_mem2:
|
|
iounmap(ax88796_data.data_area);
|
|
|
|
exit_mem:
|
|
iounmap(ax88796_data.base_regs);
|
|
|
|
exit_req2:
|
|
release_mem_region(zdev->resource.start + XS100_8390_DATA32_BASE,
|
|
XS100_8390_DATA32_SIZE);
|
|
|
|
exit_req:
|
|
release_mem_region(zdev->resource.start, 0x100);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void xsurf100_remove(struct zorro_dev *zdev)
|
|
{
|
|
struct platform_device *pdev = zorro_get_drvdata(zdev);
|
|
struct xsurf100_ax_plat_data *xs100 = dev_get_platdata(&pdev->dev);
|
|
|
|
platform_device_unregister(pdev);
|
|
|
|
iounmap(xs100->base_regs);
|
|
release_mem_region(zdev->resource.start, 0x100);
|
|
iounmap(xs100->data_area);
|
|
release_mem_region(zdev->resource.start + XS100_8390_DATA32_BASE,
|
|
XS100_8390_DATA32_SIZE);
|
|
}
|
|
|
|
static const struct zorro_device_id xsurf100_zorro_tbl[] = {
|
|
{ ZORRO_PROD_INDIVIDUAL_COMPUTERS_X_SURF100, },
|
|
{ 0 }
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(zorro, xsurf100_zorro_tbl);
|
|
|
|
static struct zorro_driver xsurf100_driver = {
|
|
.name = "xsurf100",
|
|
.id_table = xsurf100_zorro_tbl,
|
|
.probe = xsurf100_probe,
|
|
.remove = xsurf100_remove,
|
|
};
|
|
|
|
module_driver(xsurf100_driver, zorro_register_driver, zorro_unregister_driver);
|
|
|
|
MODULE_DESCRIPTION("X-Surf 100 driver");
|
|
MODULE_AUTHOR("Michael Karcher <kernel@mkarcher.dialup.fu-berlin.de>");
|
|
MODULE_LICENSE("GPL v2");
|