From: Deepak Saxena The following patch modifies the CS89x0 driver to work on Intel's IXDP2401 and IXDP2801 (Intel ARm/XScale based) platforms: - The main change requried is that the IXDP2x01 boards have the chip connected through a CPLD so all registers appear at dword-aligned addresses. A macro in the header adjusts the register offsets appropriately. - The boards do not have ISA, so we need to explicitly check for IXDP2X01 in Kconfig. - There is what I believe is a bug in the driver as it currently only asks for the signature if ioaddr & 1 is set but then reads and checks against the expected signature even when !(ioaddr & 1). This causes the driver to not load on the IXDP2x01 since our ioaddr does not have bit 1 set. - #ifdef out some bits of code that assume the chip is really sitting on an ISA bus. The main IXDP2x01 support will be coming in through rmk's tree at a later date when all the drivers are merged upstream. Signed-off-by: Andrew Morton --- 25-akpm/drivers/net/Kconfig | 2 +- 25-akpm/drivers/net/cs89x0.c | 27 +++++++++++++++++++++++++-- 25-akpm/drivers/net/cs89x0.h | 19 +++++++++++++------ 3 files changed, 39 insertions(+), 9 deletions(-) diff -puN drivers/net/cs89x0.c~add-ixdp2x01-board-support-to-cs89x0-driver drivers/net/cs89x0.c --- 25/drivers/net/cs89x0.c~add-ixdp2x01-board-support-to-cs89x0-driver 2004-08-15 22:48:18.843859696 -0700 +++ 25-akpm/drivers/net/cs89x0.c 2004-08-15 22:48:18.851858480 -0700 @@ -84,6 +84,9 @@ Oskar Schirmer : oskar@scara.com : HiCO.SH4 (superh) support added (irq#1, cs89x0_media=) + Deepak Saxena : dsaxena@plexity.net + : Intel IXDP2x01 (XScale ixp2x00 NPU) platform support + */ /* Always include 'config.h' first in case the user wants to turn on @@ -97,7 +100,11 @@ * Note that even if DMA is turned off we still support the 'dma' and 'use_dma' * module options so we don't break any startup scripts. */ +#ifndef CONFIG_ARCH_IXDP2X01 +#define ALLOW_DMA 0 +#else #define ALLOW_DMA 1 +#endif /* * Set this to zero to remove all the debug statements via @@ -162,6 +169,10 @@ static unsigned int cs8900_irq_map[] = { static unsigned int netcard_portlist[] __initdata = { 0x0300, 0}; static unsigned int cs8900_irq_map[] = {1,0,0,0}; +#elif defined(CONFIG_ARCH_IXDP2X01) +#include +static unsigned int netcard_portlist[] __initdata = {IXDP2X01_CS8900_VIRT_BASE, 0}; +static unsigned int cs8900_irq_map[] = {IRQ_IXDP2X01_CS8900, 0, 0, 0}; #else static unsigned int netcard_portlist[] __initdata = { 0x300, 0x320, 0x340, 0x360, 0x200, 0x220, 0x240, 0x260, 0x280, 0x2a0, 0x2c0, 0x2e0, 0}; @@ -454,11 +465,12 @@ cs89x0_probe1(struct net_device *dev, in retval = -ENODEV; goto out2; } - ioaddr &= ~3; - outw(PP_ChipID, ioaddr + ADD_PORT); } printk("PP_addr=0x%x\n", inw(ioaddr + ADD_PORT)); + ioaddr &= ~3; + outw(PP_ChipID, ioaddr + ADD_PORT); + if (inw(ioaddr + DATA_PORT) != CHIP_EISA_ID_SIG) { printk(KERN_ERR "%s: incorrect signature 0x%x\n", dev->name, inw(ioaddr + DATA_PORT)); @@ -665,6 +677,9 @@ printk("PP_addr=0x%x\n", inw(ioaddr + AD } else { i = lp->isa_config & INT_NO_MASK; if (lp->chip_type == CS8900) { +#ifdef CONFIG_ARCH_IXDP2X01 + i = cs8900_irq_map[0]; +#else /* Translate the IRQ using the IRQ mapping table. */ if (i >= sizeof(cs8900_irq_map)/sizeof(cs8900_irq_map[0])) printk("\ncs89x0: invalid ISA interrupt number %d\n", i); @@ -681,6 +696,7 @@ printk("PP_addr=0x%x\n", inw(ioaddr + AD if ((irq_map_buff[0] & 0xff) == PNP_IRQ_FRMT) lp->irq_map = (irq_map_buff[0]>>8) | (irq_map_buff[1] << 8); } +#endif } if (!dev->irq) dev->irq = i; @@ -884,8 +900,10 @@ skip_this_frame: void __init reset_chip(struct net_device *dev) { +#ifndef CONFIG_ARCH_IXDP2X01 struct net_local *lp = netdev_priv(dev); int ioaddr = dev->base_addr; +#endif int reset_start_time; writereg(dev, PP_SelfCTL, readreg(dev, PP_SelfCTL) | POWER_ON_RESET); @@ -894,6 +912,7 @@ void __init reset_chip(struct net_devic current->state = TASK_INTERRUPTIBLE; schedule_timeout(30*HZ/1000); +#ifndef CONFIG_ARCH_IXDP2X01 if (lp->chip_type != CS8900) { /* Hardware problem requires PNP registers to be reconfigured after a reset */ outw(PP_CS8920_ISAINT, ioaddr + ADD_PORT); @@ -904,6 +923,8 @@ void __init reset_chip(struct net_devic outb((dev->mem_start >> 16) & 0xff, ioaddr + DATA_PORT); outb((dev->mem_start >> 8) & 0xff, ioaddr + DATA_PORT + 1); } +#endif /* IXDP2x01 */ + /* Wait until the chip is reset */ reset_start_time = jiffies; while( (readreg(dev, PP_SelfST) & INIT_DONE) == 0 && jiffies - reset_start_time < 2) @@ -1155,12 +1176,14 @@ net_open(struct net_device *dev) else #endif { +#ifndef CONFIG_ARCH_IXDP2X01 if (((1 << dev->irq) & lp->irq_map) == 0) { printk(KERN_ERR "%s: IRQ %d is not in our map of allowable IRQs, which is %x\n", dev->name, dev->irq, lp->irq_map); ret = -EAGAIN; goto bad_out; } +#endif /* FIXME: Cirrus' release had this: */ writereg(dev, PP_BusCTL, readreg(dev, PP_BusCTL)|ENABLE_IRQ ); /* And 2.3.47 had this: */ diff -puN drivers/net/cs89x0.h~add-ixdp2x01-board-support-to-cs89x0-driver drivers/net/cs89x0.h --- 25/drivers/net/cs89x0.h~add-ixdp2x01-board-support-to-cs89x0-driver 2004-08-15 22:48:18.844859544 -0700 +++ 25-akpm/drivers/net/cs89x0.h 2004-08-15 22:48:18.852858328 -0700 @@ -16,6 +16,13 @@ #include +#ifdef CONFIG_ARCH_IXDP2X01 +/* IXDP2401/IXDP2801 uses dword-aligned register addressing */ +#define CS89x0_PORT(reg) ((reg) * 2) +#else +#define CS89x0_PORT(reg) (reg) +#endif + #define PP_ChipID 0x0000 /* offset 0h -> Corp -ID */ /* offset 2h -> Model/Product Number */ /* offset 3h -> Chip Revision Number */ @@ -324,16 +331,16 @@ #define RAM_SIZE 0x1000 /* The card has 4k bytes or RAM */ #define PKT_START PP_TxFrame /* Start of packet RAM */ -#define RX_FRAME_PORT 0x0000 +#define RX_FRAME_PORT CS89x0_PORT(0x0000) #define TX_FRAME_PORT RX_FRAME_PORT -#define TX_CMD_PORT 0x0004 +#define TX_CMD_PORT CS89x0_PORT(0x0004) #define TX_NOW 0x0000 /* Tx packet after 5 bytes copied */ #define TX_AFTER_381 0x0040 /* Tx packet after 381 bytes copied */ #define TX_AFTER_ALL 0x00c0 /* Tx packet after all bytes copied */ -#define TX_LEN_PORT 0x0006 -#define ISQ_PORT 0x0008 -#define ADD_PORT 0x000A -#define DATA_PORT 0x000C +#define TX_LEN_PORT CS89x0_PORT(0x0006) +#define ISQ_PORT CS89x0_PORT(0x0008) +#define ADD_PORT CS89x0_PORT(0x000A) +#define DATA_PORT CS89x0_PORT(0x000C) #define EEPROM_WRITE_EN 0x00F0 #define EEPROM_WRITE_DIS 0x0000 diff -puN drivers/net/Kconfig~add-ixdp2x01-board-support-to-cs89x0-driver drivers/net/Kconfig --- 25/drivers/net/Kconfig~add-ixdp2x01-board-support-to-cs89x0-driver 2004-08-15 22:48:18.846859240 -0700 +++ 25-akpm/drivers/net/Kconfig 2004-08-15 22:48:18.855857872 -0700 @@ -1353,7 +1353,7 @@ config FORCEDETH config CS89x0 tristate "CS89x0 support" - depends on NET_PCI && ISA + depends on NET_PCI && (ISA || ARCH_IXDP2X01) ---help--- Support for CS89x0 chipset based Ethernet cards. If you have a network (Ethernet) card of this type, say Y and read the _