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1914 lines
51 KiB
1914 lines
51 KiB
/* cs89x0.c: A Crystal Semiconductor (Now Cirrus Logic) CS89[02]0 |
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* driver for linux. |
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* Written 1996 by Russell Nelson, with reference to skeleton.c |
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* written 1993-1994 by Donald Becker. |
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* |
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* This software may be used and distributed according to the terms |
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* of the GNU General Public License, incorporated herein by reference. |
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* |
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* The author may be reached at [email protected], Crynwr |
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* Software, 521 Pleasant Valley Rd., Potsdam, NY 13676 |
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* |
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* Other contributors: |
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* Mike Cruse : [email protected] |
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* Russ Nelson |
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* Melody Lee : [email protected] |
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* Alan Cox |
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* Andrew Morton |
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* Oskar Schirmer : [email protected] |
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* Deepak Saxena : [email protected] |
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* Dmitry Pervushin : [email protected] |
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* Deepak Saxena : [email protected] |
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* Domenico Andreoli : [email protected] |
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*/ |
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/* |
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* Set this to zero to disable DMA code |
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* |
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* Note that even if DMA is turned off we still support the 'dma' and 'use_dma' |
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* module options so we don't break any startup scripts. |
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*/ |
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#ifndef CONFIG_ISA_DMA_API |
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#define ALLOW_DMA 0 |
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#else |
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#define ALLOW_DMA 1 |
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#endif |
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/* |
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* Set this to zero to remove all the debug statements via |
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* dead code elimination |
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*/ |
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#define DEBUGGING 1 |
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|
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/* Sources: |
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* Crynwr packet driver epktisa. |
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* Crystal Semiconductor data sheets. |
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*/ |
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
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#include <linux/module.h> |
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#include <linux/printk.h> |
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#include <linux/errno.h> |
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#include <linux/netdevice.h> |
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#include <linux/etherdevice.h> |
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#include <linux/of.h> |
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#include <linux/of_device.h> |
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#include <linux/platform_device.h> |
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#include <linux/kernel.h> |
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#include <linux/types.h> |
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#include <linux/fcntl.h> |
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#include <linux/interrupt.h> |
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#include <linux/ioport.h> |
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#include <linux/in.h> |
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#include <linux/jiffies.h> |
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#include <linux/skbuff.h> |
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#include <linux/spinlock.h> |
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#include <linux/string.h> |
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#include <linux/init.h> |
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#include <linux/bitops.h> |
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#include <linux/delay.h> |
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#include <linux/gfp.h> |
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#include <linux/io.h> |
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#include <asm/irq.h> |
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#include <linux/atomic.h> |
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#if ALLOW_DMA |
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#include <asm/dma.h> |
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#endif |
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#include "cs89x0.h" |
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#define cs89_dbg(val, level, fmt, ...) \ |
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do { \ |
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if (val <= net_debug) \ |
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pr_##level(fmt, ##__VA_ARGS__); \ |
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} while (0) |
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static char version[] __initdata = |
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"v2.4.3-pre1 Russell Nelson <[email protected]>, Andrew Morton"; |
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#define DRV_NAME "cs89x0" |
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/* First, a few definitions that the brave might change. |
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* A zero-terminated list of I/O addresses to be probed. Some special flags.. |
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* Addr & 1 = Read back the address port, look for signature and reset |
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* the page window before probing |
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* Addr & 3 = Reset the page window and probe |
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* The CLPS eval board has the Cirrus chip at 0x80090300, in ARM IO space, |
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* but it is possible that a Cirrus board could be plugged into the ISA |
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* slots. |
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*/ |
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/* The cs8900 has 4 IRQ pins, software selectable. cs8900_irq_map maps |
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* them to system IRQ numbers. This mapping is card specific and is set to |
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* the configuration of the Cirrus Eval board for this chip. |
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*/ |
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#ifndef CONFIG_CS89x0_PLATFORM |
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static unsigned int netcard_portlist[] __used __initdata = { |
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0x300, 0x320, 0x340, 0x360, 0x200, 0x220, 0x240, |
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0x260, 0x280, 0x2a0, 0x2c0, 0x2e0, 0 |
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}; |
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static unsigned int cs8900_irq_map[] = { |
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10, 11, 12, 5 |
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}; |
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#endif |
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#if DEBUGGING |
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static unsigned int net_debug = DEBUGGING; |
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#else |
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#define net_debug 0 /* gcc will remove all the debug code for us */ |
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#endif |
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/* The number of low I/O ports used by the ethercard. */ |
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#define NETCARD_IO_EXTENT 16 |
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/* we allow the user to override various values normally set in the EEPROM */ |
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#define FORCE_RJ45 0x0001 /* pick one of these three */ |
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#define FORCE_AUI 0x0002 |
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#define FORCE_BNC 0x0004 |
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#define FORCE_AUTO 0x0010 /* pick one of these three */ |
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#define FORCE_HALF 0x0020 |
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#define FORCE_FULL 0x0030 |
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/* Information that need to be kept for each board. */ |
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struct net_local { |
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int chip_type; /* one of: CS8900, CS8920, CS8920M */ |
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char chip_revision; /* revision letter of the chip ('A'...) */ |
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int send_cmd; /* the proper send command: TX_NOW, TX_AFTER_381, or TX_AFTER_ALL */ |
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int auto_neg_cnf; /* auto-negotiation word from EEPROM */ |
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int adapter_cnf; /* adapter configuration from EEPROM */ |
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int isa_config; /* ISA configuration from EEPROM */ |
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int irq_map; /* IRQ map from EEPROM */ |
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int rx_mode; /* what mode are we in? 0, RX_MULTCAST_ACCEPT, or RX_ALL_ACCEPT */ |
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int curr_rx_cfg; /* a copy of PP_RxCFG */ |
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int linectl; /* either 0 or LOW_RX_SQUELCH, depending on configuration. */ |
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int send_underrun; /* keep track of how many underruns in a row we get */ |
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int force; /* force various values; see FORCE* above. */ |
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spinlock_t lock; |
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void __iomem *virt_addr;/* CS89x0 virtual address. */ |
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#if ALLOW_DMA |
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int use_dma; /* Flag: we're using dma */ |
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int dma; /* DMA channel */ |
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int dmasize; /* 16 or 64 */ |
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unsigned char *dma_buff; /* points to the beginning of the buffer */ |
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unsigned char *end_dma_buff; /* points to the end of the buffer */ |
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unsigned char *rx_dma_ptr; /* points to the next packet */ |
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#endif |
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}; |
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/* Example routines you must write ;->. */ |
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#define tx_done(dev) 1 |
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/* |
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* Permit 'cs89x0_dma=N' in the kernel boot environment |
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*/ |
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#if !defined(MODULE) |
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#if ALLOW_DMA |
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static int g_cs89x0_dma; |
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static int __init dma_fn(char *str) |
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{ |
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g_cs89x0_dma = simple_strtol(str, NULL, 0); |
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return 1; |
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} |
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__setup("cs89x0_dma=", dma_fn); |
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#endif /* ALLOW_DMA */ |
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static int g_cs89x0_media__force; |
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static int __init media_fn(char *str) |
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{ |
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if (!strcmp(str, "rj45")) |
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g_cs89x0_media__force = FORCE_RJ45; |
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else if (!strcmp(str, "aui")) |
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g_cs89x0_media__force = FORCE_AUI; |
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else if (!strcmp(str, "bnc")) |
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g_cs89x0_media__force = FORCE_BNC; |
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return 1; |
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} |
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__setup("cs89x0_media=", media_fn); |
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#endif |
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static void readwords(struct net_local *lp, int portno, void *buf, int length) |
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{ |
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u8 *buf8 = (u8 *)buf; |
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do { |
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u16 tmp16; |
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tmp16 = ioread16(lp->virt_addr + portno); |
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*buf8++ = (u8)tmp16; |
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*buf8++ = (u8)(tmp16 >> 8); |
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} while (--length); |
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} |
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static void writewords(struct net_local *lp, int portno, void *buf, int length) |
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{ |
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u8 *buf8 = (u8 *)buf; |
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do { |
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u16 tmp16; |
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tmp16 = *buf8++; |
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tmp16 |= (*buf8++) << 8; |
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iowrite16(tmp16, lp->virt_addr + portno); |
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} while (--length); |
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} |
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static u16 |
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readreg(struct net_device *dev, u16 regno) |
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{ |
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struct net_local *lp = netdev_priv(dev); |
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iowrite16(regno, lp->virt_addr + ADD_PORT); |
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return ioread16(lp->virt_addr + DATA_PORT); |
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} |
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static void |
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writereg(struct net_device *dev, u16 regno, u16 value) |
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{ |
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struct net_local *lp = netdev_priv(dev); |
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iowrite16(regno, lp->virt_addr + ADD_PORT); |
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iowrite16(value, lp->virt_addr + DATA_PORT); |
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} |
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static int __init |
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wait_eeprom_ready(struct net_device *dev) |
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{ |
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unsigned long timeout = jiffies; |
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/* check to see if the EEPROM is ready, |
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* a timeout is used just in case EEPROM is ready when |
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* SI_BUSY in the PP_SelfST is clear |
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*/ |
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while (readreg(dev, PP_SelfST) & SI_BUSY) |
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if (time_after_eq(jiffies, timeout + 40)) |
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return -1; |
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return 0; |
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} |
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static int __init |
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get_eeprom_data(struct net_device *dev, int off, int len, int *buffer) |
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{ |
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int i; |
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cs89_dbg(3, info, "EEPROM data from %x for %x:", off, len); |
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for (i = 0; i < len; i++) { |
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if (wait_eeprom_ready(dev) < 0) |
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return -1; |
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/* Now send the EEPROM read command and EEPROM location to read */ |
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writereg(dev, PP_EECMD, (off + i) | EEPROM_READ_CMD); |
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if (wait_eeprom_ready(dev) < 0) |
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return -1; |
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buffer[i] = readreg(dev, PP_EEData); |
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cs89_dbg(3, cont, " %04x", buffer[i]); |
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} |
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cs89_dbg(3, cont, "\n"); |
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return 0; |
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} |
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static int __init |
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get_eeprom_cksum(int off, int len, int *buffer) |
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{ |
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int i, cksum; |
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cksum = 0; |
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for (i = 0; i < len; i++) |
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cksum += buffer[i]; |
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cksum &= 0xffff; |
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if (cksum == 0) |
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return 0; |
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return -1; |
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} |
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static void |
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write_irq(struct net_device *dev, int chip_type, int irq) |
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{ |
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int i; |
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if (chip_type == CS8900) { |
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#ifndef CONFIG_CS89x0_PLATFORM |
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/* Search the mapping table for the corresponding IRQ pin. */ |
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for (i = 0; i != ARRAY_SIZE(cs8900_irq_map); i++) |
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if (cs8900_irq_map[i] == irq) |
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break; |
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/* Not found */ |
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if (i == ARRAY_SIZE(cs8900_irq_map)) |
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i = 3; |
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#else |
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/* INTRQ0 pin is used for interrupt generation. */ |
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i = 0; |
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#endif |
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writereg(dev, PP_CS8900_ISAINT, i); |
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} else { |
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writereg(dev, PP_CS8920_ISAINT, irq); |
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} |
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} |
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static void |
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count_rx_errors(int status, struct net_device *dev) |
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{ |
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dev->stats.rx_errors++; |
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if (status & RX_RUNT) |
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dev->stats.rx_length_errors++; |
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if (status & RX_EXTRA_DATA) |
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dev->stats.rx_length_errors++; |
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if ((status & RX_CRC_ERROR) && !(status & (RX_EXTRA_DATA | RX_RUNT))) |
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/* per str 172 */ |
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dev->stats.rx_crc_errors++; |
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if (status & RX_DRIBBLE) |
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dev->stats.rx_frame_errors++; |
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} |
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/********************************* |
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* This page contains DMA routines |
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*********************************/ |
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#if ALLOW_DMA |
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#define dma_page_eq(ptr1, ptr2) ((long)(ptr1) >> 17 == (long)(ptr2) >> 17) |
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static void |
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get_dma_channel(struct net_device *dev) |
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{ |
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struct net_local *lp = netdev_priv(dev); |
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if (lp->dma) { |
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dev->dma = lp->dma; |
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lp->isa_config |= ISA_RxDMA; |
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} else { |
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if ((lp->isa_config & ANY_ISA_DMA) == 0) |
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return; |
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dev->dma = lp->isa_config & DMA_NO_MASK; |
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if (lp->chip_type == CS8900) |
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dev->dma += 5; |
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if (dev->dma < 5 || dev->dma > 7) { |
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lp->isa_config &= ~ANY_ISA_DMA; |
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return; |
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} |
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} |
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} |
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static void |
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write_dma(struct net_device *dev, int chip_type, int dma) |
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{ |
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struct net_local *lp = netdev_priv(dev); |
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if ((lp->isa_config & ANY_ISA_DMA) == 0) |
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return; |
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if (chip_type == CS8900) |
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writereg(dev, PP_CS8900_ISADMA, dma - 5); |
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else |
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writereg(dev, PP_CS8920_ISADMA, dma); |
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} |
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static void |
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set_dma_cfg(struct net_device *dev) |
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{ |
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struct net_local *lp = netdev_priv(dev); |
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if (lp->use_dma) { |
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if ((lp->isa_config & ANY_ISA_DMA) == 0) { |
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cs89_dbg(3, err, "set_dma_cfg(): no DMA\n"); |
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return; |
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} |
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if (lp->isa_config & ISA_RxDMA) { |
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lp->curr_rx_cfg |= RX_DMA_ONLY; |
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cs89_dbg(3, info, "set_dma_cfg(): RX_DMA_ONLY\n"); |
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} else { |
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lp->curr_rx_cfg |= AUTO_RX_DMA; /* not that we support it... */ |
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cs89_dbg(3, info, "set_dma_cfg(): AUTO_RX_DMA\n"); |
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} |
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} |
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} |
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static int |
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dma_bufcfg(struct net_device *dev) |
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{ |
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struct net_local *lp = netdev_priv(dev); |
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if (lp->use_dma) |
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return (lp->isa_config & ANY_ISA_DMA) ? RX_DMA_ENBL : 0; |
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else |
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return 0; |
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} |
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static int |
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dma_busctl(struct net_device *dev) |
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{ |
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int retval = 0; |
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struct net_local *lp = netdev_priv(dev); |
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if (lp->use_dma) { |
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if (lp->isa_config & ANY_ISA_DMA) |
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retval |= RESET_RX_DMA; /* Reset the DMA pointer */ |
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if (lp->isa_config & DMA_BURST) |
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retval |= DMA_BURST_MODE; /* Does ISA config specify DMA burst ? */ |
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if (lp->dmasize == 64) |
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retval |= RX_DMA_SIZE_64K; /* did they ask for 64K? */ |
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retval |= MEMORY_ON; /* we need memory enabled to use DMA. */ |
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} |
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return retval; |
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} |
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static void |
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dma_rx(struct net_device *dev) |
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{ |
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struct net_local *lp = netdev_priv(dev); |
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struct sk_buff *skb; |
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int status, length; |
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unsigned char *bp = lp->rx_dma_ptr; |
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status = bp[0] + (bp[1] << 8); |
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length = bp[2] + (bp[3] << 8); |
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bp += 4; |
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cs89_dbg(5, debug, "%s: receiving DMA packet at %lx, status %x, length %x\n", |
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dev->name, (unsigned long)bp, status, length); |
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if ((status & RX_OK) == 0) { |
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count_rx_errors(status, dev); |
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goto skip_this_frame; |
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} |
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/* Malloc up new buffer. */ |
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skb = netdev_alloc_skb(dev, length + 2); |
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if (skb == NULL) { |
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dev->stats.rx_dropped++; |
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/* AKPM: advance bp to the next frame */ |
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skip_this_frame: |
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bp += (length + 3) & ~3; |
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if (bp >= lp->end_dma_buff) |
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bp -= lp->dmasize * 1024; |
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lp->rx_dma_ptr = bp; |
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return; |
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} |
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skb_reserve(skb, 2); /* longword align L3 header */ |
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if (bp + length > lp->end_dma_buff) { |
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int semi_cnt = lp->end_dma_buff - bp; |
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skb_put_data(skb, bp, semi_cnt); |
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skb_put_data(skb, lp->dma_buff, length - semi_cnt); |
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} else { |
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skb_put_data(skb, bp, length); |
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} |
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bp += (length + 3) & ~3; |
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if (bp >= lp->end_dma_buff) |
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bp -= lp->dmasize*1024; |
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lp->rx_dma_ptr = bp; |
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cs89_dbg(3, info, "%s: received %d byte DMA packet of type %x\n", |
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dev->name, length, |
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((skb->data[ETH_ALEN + ETH_ALEN] << 8) | |
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skb->data[ETH_ALEN + ETH_ALEN + 1])); |
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skb->protocol = eth_type_trans(skb, dev); |
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netif_rx(skb); |
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dev->stats.rx_packets++; |
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dev->stats.rx_bytes += length; |
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} |
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static void release_dma_buff(struct net_local *lp) |
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{ |
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if (lp->dma_buff) { |
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free_pages((unsigned long)(lp->dma_buff), |
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get_order(lp->dmasize * 1024)); |
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lp->dma_buff = NULL; |
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} |
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} |
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#endif /* ALLOW_DMA */ |
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static void |
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control_dc_dc(struct net_device *dev, int on_not_off) |
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{ |
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struct net_local *lp = netdev_priv(dev); |
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unsigned int selfcontrol; |
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unsigned long timenow = jiffies; |
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/* control the DC to DC convertor in the SelfControl register. |
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* Note: This is hooked up to a general purpose pin, might not |
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* always be a DC to DC convertor. |
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*/ |
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selfcontrol = HCB1_ENBL; /* Enable the HCB1 bit as an output */ |
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if (((lp->adapter_cnf & A_CNF_DC_DC_POLARITY) != 0) ^ on_not_off) |
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selfcontrol |= HCB1; |
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else |
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selfcontrol &= ~HCB1; |
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writereg(dev, PP_SelfCTL, selfcontrol); |
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|
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/* Wait for the DC/DC converter to power up - 500ms */ |
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while (time_before(jiffies, timenow + HZ)) |
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; |
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} |
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|
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/* send a test packet - return true if carrier bits are ok */ |
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static int |
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send_test_pkt(struct net_device *dev) |
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{ |
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struct net_local *lp = netdev_priv(dev); |
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char test_packet[] = { |
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
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0, 46, /* A 46 in network order */ |
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0, 0, /* DSAP=0 & SSAP=0 fields */ |
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0xf3, 0 /* Control (Test Req + P bit set) */ |
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}; |
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unsigned long timenow = jiffies; |
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writereg(dev, PP_LineCTL, readreg(dev, PP_LineCTL) | SERIAL_TX_ON); |
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memcpy(test_packet, dev->dev_addr, ETH_ALEN); |
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memcpy(test_packet + ETH_ALEN, dev->dev_addr, ETH_ALEN); |
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iowrite16(TX_AFTER_ALL, lp->virt_addr + TX_CMD_PORT); |
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iowrite16(ETH_ZLEN, lp->virt_addr + TX_LEN_PORT); |
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/* Test to see if the chip has allocated memory for the packet */ |
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while (time_before(jiffies, timenow + 5)) |
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if (readreg(dev, PP_BusST) & READY_FOR_TX_NOW) |
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break; |
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if (time_after_eq(jiffies, timenow + 5)) |
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return 0; /* this shouldn't happen */ |
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/* Write the contents of the packet */ |
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writewords(lp, TX_FRAME_PORT, test_packet, (ETH_ZLEN + 1) >> 1); |
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cs89_dbg(1, debug, "Sending test packet "); |
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/* wait a couple of jiffies for packet to be received */ |
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for (timenow = jiffies; time_before(jiffies, timenow + 3);) |
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; |
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if ((readreg(dev, PP_TxEvent) & TX_SEND_OK_BITS) == TX_OK) { |
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cs89_dbg(1, cont, "succeeded\n"); |
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return 1; |
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} |
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cs89_dbg(1, cont, "failed\n"); |
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return 0; |
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} |
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|
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#define DETECTED_NONE 0 |
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#define DETECTED_RJ45H 1 |
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#define DETECTED_RJ45F 2 |
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#define DETECTED_AUI 3 |
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#define DETECTED_BNC 4 |
|
|
|
static int |
|
detect_tp(struct net_device *dev) |
|
{ |
|
struct net_local *lp = netdev_priv(dev); |
|
unsigned long timenow = jiffies; |
|
int fdx; |
|
|
|
cs89_dbg(1, debug, "%s: Attempting TP\n", dev->name); |
|
|
|
/* If connected to another full duplex capable 10-Base-T card |
|
* the link pulses seem to be lost when the auto detect bit in |
|
* the LineCTL is set. To overcome this the auto detect bit will |
|
* be cleared whilst testing the 10-Base-T interface. This would |
|
* not be necessary for the sparrow chip but is simpler to do it |
|
* anyway. |
|
*/ |
|
writereg(dev, PP_LineCTL, lp->linectl & ~AUI_ONLY); |
|
control_dc_dc(dev, 0); |
|
|
|
/* Delay for the hardware to work out if the TP cable is present |
|
* - 150ms |
|
*/ |
|
for (timenow = jiffies; time_before(jiffies, timenow + 15);) |
|
; |
|
if ((readreg(dev, PP_LineST) & LINK_OK) == 0) |
|
return DETECTED_NONE; |
|
|
|
if (lp->chip_type == CS8900) { |
|
switch (lp->force & 0xf0) { |
|
#if 0 |
|
case FORCE_AUTO: |
|
pr_info("%s: cs8900 doesn't autonegotiate\n", |
|
dev->name); |
|
return DETECTED_NONE; |
|
#endif |
|
/* CS8900 doesn't support AUTO, change to HALF*/ |
|
case FORCE_AUTO: |
|
lp->force &= ~FORCE_AUTO; |
|
lp->force |= FORCE_HALF; |
|
break; |
|
case FORCE_HALF: |
|
break; |
|
case FORCE_FULL: |
|
writereg(dev, PP_TestCTL, |
|
readreg(dev, PP_TestCTL) | FDX_8900); |
|
break; |
|
} |
|
fdx = readreg(dev, PP_TestCTL) & FDX_8900; |
|
} else { |
|
switch (lp->force & 0xf0) { |
|
case FORCE_AUTO: |
|
lp->auto_neg_cnf = AUTO_NEG_ENABLE; |
|
break; |
|
case FORCE_HALF: |
|
lp->auto_neg_cnf = 0; |
|
break; |
|
case FORCE_FULL: |
|
lp->auto_neg_cnf = RE_NEG_NOW | ALLOW_FDX; |
|
break; |
|
} |
|
|
|
writereg(dev, PP_AutoNegCTL, lp->auto_neg_cnf & AUTO_NEG_MASK); |
|
|
|
if ((lp->auto_neg_cnf & AUTO_NEG_BITS) == AUTO_NEG_ENABLE) { |
|
pr_info("%s: negotiating duplex...\n", dev->name); |
|
while (readreg(dev, PP_AutoNegST) & AUTO_NEG_BUSY) { |
|
if (time_after(jiffies, timenow + 4000)) { |
|
pr_err("**** Full / half duplex auto-negotiation timed out ****\n"); |
|
break; |
|
} |
|
} |
|
} |
|
fdx = readreg(dev, PP_AutoNegST) & FDX_ACTIVE; |
|
} |
|
if (fdx) |
|
return DETECTED_RJ45F; |
|
else |
|
return DETECTED_RJ45H; |
|
} |
|
|
|
static int |
|
detect_bnc(struct net_device *dev) |
|
{ |
|
struct net_local *lp = netdev_priv(dev); |
|
|
|
cs89_dbg(1, debug, "%s: Attempting BNC\n", dev->name); |
|
control_dc_dc(dev, 1); |
|
|
|
writereg(dev, PP_LineCTL, (lp->linectl & ~AUTO_AUI_10BASET) | AUI_ONLY); |
|
|
|
if (send_test_pkt(dev)) |
|
return DETECTED_BNC; |
|
else |
|
return DETECTED_NONE; |
|
} |
|
|
|
static int |
|
detect_aui(struct net_device *dev) |
|
{ |
|
struct net_local *lp = netdev_priv(dev); |
|
|
|
cs89_dbg(1, debug, "%s: Attempting AUI\n", dev->name); |
|
control_dc_dc(dev, 0); |
|
|
|
writereg(dev, PP_LineCTL, (lp->linectl & ~AUTO_AUI_10BASET) | AUI_ONLY); |
|
|
|
if (send_test_pkt(dev)) |
|
return DETECTED_AUI; |
|
else |
|
return DETECTED_NONE; |
|
} |
|
|
|
/* We have a good packet(s), get it/them out of the buffers. */ |
|
static void |
|
net_rx(struct net_device *dev) |
|
{ |
|
struct net_local *lp = netdev_priv(dev); |
|
struct sk_buff *skb; |
|
int status, length; |
|
|
|
status = ioread16(lp->virt_addr + RX_FRAME_PORT); |
|
length = ioread16(lp->virt_addr + RX_FRAME_PORT); |
|
|
|
if ((status & RX_OK) == 0) { |
|
count_rx_errors(status, dev); |
|
return; |
|
} |
|
|
|
/* Malloc up new buffer. */ |
|
skb = netdev_alloc_skb(dev, length + 2); |
|
if (skb == NULL) { |
|
dev->stats.rx_dropped++; |
|
return; |
|
} |
|
skb_reserve(skb, 2); /* longword align L3 header */ |
|
|
|
readwords(lp, RX_FRAME_PORT, skb_put(skb, length), length >> 1); |
|
if (length & 1) |
|
skb->data[length-1] = ioread16(lp->virt_addr + RX_FRAME_PORT); |
|
|
|
cs89_dbg(3, debug, "%s: received %d byte packet of type %x\n", |
|
dev->name, length, |
|
(skb->data[ETH_ALEN + ETH_ALEN] << 8) | |
|
skb->data[ETH_ALEN + ETH_ALEN + 1]); |
|
|
|
skb->protocol = eth_type_trans(skb, dev); |
|
netif_rx(skb); |
|
dev->stats.rx_packets++; |
|
dev->stats.rx_bytes += length; |
|
} |
|
|
|
/* The typical workload of the driver: |
|
* Handle the network interface interrupts. |
|
*/ |
|
|
|
static irqreturn_t net_interrupt(int irq, void *dev_id) |
|
{ |
|
struct net_device *dev = dev_id; |
|
struct net_local *lp; |
|
int status; |
|
int handled = 0; |
|
|
|
lp = netdev_priv(dev); |
|
|
|
/* we MUST read all the events out of the ISQ, otherwise we'll never |
|
* get interrupted again. As a consequence, we can't have any limit |
|
* on the number of times we loop in the interrupt handler. The |
|
* hardware guarantees that eventually we'll run out of events. Of |
|
* course, if you're on a slow machine, and packets are arriving |
|
* faster than you can read them off, you're screwed. Hasta la |
|
* vista, baby! |
|
*/ |
|
while ((status = ioread16(lp->virt_addr + ISQ_PORT))) { |
|
cs89_dbg(4, debug, "%s: event=%04x\n", dev->name, status); |
|
handled = 1; |
|
switch (status & ISQ_EVENT_MASK) { |
|
case ISQ_RECEIVER_EVENT: |
|
/* Got a packet(s). */ |
|
net_rx(dev); |
|
break; |
|
case ISQ_TRANSMITTER_EVENT: |
|
dev->stats.tx_packets++; |
|
netif_wake_queue(dev); /* Inform upper layers. */ |
|
if ((status & (TX_OK | |
|
TX_LOST_CRS | |
|
TX_SQE_ERROR | |
|
TX_LATE_COL | |
|
TX_16_COL)) != TX_OK) { |
|
if ((status & TX_OK) == 0) |
|
dev->stats.tx_errors++; |
|
if (status & TX_LOST_CRS) |
|
dev->stats.tx_carrier_errors++; |
|
if (status & TX_SQE_ERROR) |
|
dev->stats.tx_heartbeat_errors++; |
|
if (status & TX_LATE_COL) |
|
dev->stats.tx_window_errors++; |
|
if (status & TX_16_COL) |
|
dev->stats.tx_aborted_errors++; |
|
} |
|
break; |
|
case ISQ_BUFFER_EVENT: |
|
if (status & READY_FOR_TX) { |
|
/* we tried to transmit a packet earlier, |
|
* but inexplicably ran out of buffers. |
|
* That shouldn't happen since we only ever |
|
* load one packet. Shrug. Do the right |
|
* thing anyway. |
|
*/ |
|
netif_wake_queue(dev); /* Inform upper layers. */ |
|
} |
|
if (status & TX_UNDERRUN) { |
|
cs89_dbg(0, err, "%s: transmit underrun\n", |
|
dev->name); |
|
lp->send_underrun++; |
|
if (lp->send_underrun == 3) |
|
lp->send_cmd = TX_AFTER_381; |
|
else if (lp->send_underrun == 6) |
|
lp->send_cmd = TX_AFTER_ALL; |
|
/* transmit cycle is done, although |
|
* frame wasn't transmitted - this |
|
* avoids having to wait for the upper |
|
* layers to timeout on us, in the |
|
* event of a tx underrun |
|
*/ |
|
netif_wake_queue(dev); /* Inform upper layers. */ |
|
} |
|
#if ALLOW_DMA |
|
if (lp->use_dma && (status & RX_DMA)) { |
|
int count = readreg(dev, PP_DmaFrameCnt); |
|
while (count) { |
|
cs89_dbg(5, debug, |
|
"%s: receiving %d DMA frames\n", |
|
dev->name, count); |
|
if (count > 1) |
|
cs89_dbg(2, debug, |
|
"%s: receiving %d DMA frames\n", |
|
dev->name, count); |
|
dma_rx(dev); |
|
if (--count == 0) |
|
count = readreg(dev, PP_DmaFrameCnt); |
|
if (count > 0) |
|
cs89_dbg(2, debug, |
|
"%s: continuing with %d DMA frames\n", |
|
dev->name, count); |
|
} |
|
} |
|
#endif |
|
break; |
|
case ISQ_RX_MISS_EVENT: |
|
dev->stats.rx_missed_errors += (status >> 6); |
|
break; |
|
case ISQ_TX_COL_EVENT: |
|
dev->stats.collisions += (status >> 6); |
|
break; |
|
} |
|
} |
|
return IRQ_RETVAL(handled); |
|
} |
|
|
|
/* Open/initialize the board. This is called (in the current kernel) |
|
sometime after booting when the 'ifconfig' program is run. |
|
|
|
This routine should set everything up anew at each open, even |
|
registers that "should" only need to be set once at boot, so that |
|
there is non-reboot way to recover if something goes wrong. |
|
*/ |
|
|
|
/* AKPM: do we need to do any locking here? */ |
|
|
|
static int |
|
net_open(struct net_device *dev) |
|
{ |
|
struct net_local *lp = netdev_priv(dev); |
|
int result = 0; |
|
int i; |
|
int ret; |
|
|
|
if (dev->irq < 2) { |
|
/* Allow interrupts to be generated by the chip */ |
|
/* Cirrus' release had this: */ |
|
#if 0 |
|
writereg(dev, PP_BusCTL, readreg(dev, PP_BusCTL) | ENABLE_IRQ); |
|
#endif |
|
/* And 2.3.47 had this: */ |
|
writereg(dev, PP_BusCTL, ENABLE_IRQ | MEMORY_ON); |
|
|
|
for (i = 2; i < CS8920_NO_INTS; i++) { |
|
if ((1 << i) & lp->irq_map) { |
|
if (request_irq(i, net_interrupt, 0, dev->name, |
|
dev) == 0) { |
|
dev->irq = i; |
|
write_irq(dev, lp->chip_type, i); |
|
/* writereg(dev, PP_BufCFG, GENERATE_SW_INTERRUPT); */ |
|
break; |
|
} |
|
} |
|
} |
|
|
|
if (i >= CS8920_NO_INTS) { |
|
writereg(dev, PP_BusCTL, 0); /* disable interrupts. */ |
|
pr_err("can't get an interrupt\n"); |
|
ret = -EAGAIN; |
|
goto bad_out; |
|
} |
|
} else { |
|
#if !defined(CONFIG_CS89x0_PLATFORM) |
|
if (((1 << dev->irq) & lp->irq_map) == 0) { |
|
pr_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: */ |
|
#if 0 |
|
writereg(dev, PP_BusCTL, ENABLE_IRQ | MEMORY_ON); |
|
#endif |
|
write_irq(dev, lp->chip_type, dev->irq); |
|
ret = request_irq(dev->irq, net_interrupt, 0, dev->name, dev); |
|
if (ret) { |
|
pr_err("request_irq(%d) failed\n", dev->irq); |
|
goto bad_out; |
|
} |
|
} |
|
|
|
#if ALLOW_DMA |
|
if (lp->use_dma && (lp->isa_config & ANY_ISA_DMA)) { |
|
unsigned long flags; |
|
lp->dma_buff = (unsigned char *)__get_dma_pages(GFP_KERNEL, |
|
get_order(lp->dmasize * 1024)); |
|
if (!lp->dma_buff) { |
|
pr_err("%s: cannot get %dK memory for DMA\n", |
|
dev->name, lp->dmasize); |
|
goto release_irq; |
|
} |
|
cs89_dbg(1, debug, "%s: dma %lx %lx\n", |
|
dev->name, |
|
(unsigned long)lp->dma_buff, |
|
(unsigned long)isa_virt_to_bus(lp->dma_buff)); |
|
if ((unsigned long)lp->dma_buff >= MAX_DMA_ADDRESS || |
|
!dma_page_eq(lp->dma_buff, |
|
lp->dma_buff + lp->dmasize * 1024 - 1)) { |
|
pr_err("%s: not usable as DMA buffer\n", dev->name); |
|
goto release_irq; |
|
} |
|
memset(lp->dma_buff, 0, lp->dmasize * 1024); /* Why? */ |
|
if (request_dma(dev->dma, dev->name)) { |
|
pr_err("%s: cannot get dma channel %d\n", |
|
dev->name, dev->dma); |
|
goto release_irq; |
|
} |
|
write_dma(dev, lp->chip_type, dev->dma); |
|
lp->rx_dma_ptr = lp->dma_buff; |
|
lp->end_dma_buff = lp->dma_buff + lp->dmasize * 1024; |
|
spin_lock_irqsave(&lp->lock, flags); |
|
disable_dma(dev->dma); |
|
clear_dma_ff(dev->dma); |
|
set_dma_mode(dev->dma, DMA_RX_MODE); /* auto_init as well */ |
|
set_dma_addr(dev->dma, isa_virt_to_bus(lp->dma_buff)); |
|
set_dma_count(dev->dma, lp->dmasize * 1024); |
|
enable_dma(dev->dma); |
|
spin_unlock_irqrestore(&lp->lock, flags); |
|
} |
|
#endif /* ALLOW_DMA */ |
|
|
|
/* set the Ethernet address */ |
|
for (i = 0; i < ETH_ALEN / 2; i++) |
|
writereg(dev, PP_IA + i * 2, |
|
(dev->dev_addr[i * 2] | |
|
(dev->dev_addr[i * 2 + 1] << 8))); |
|
|
|
/* while we're testing the interface, leave interrupts disabled */ |
|
writereg(dev, PP_BusCTL, MEMORY_ON); |
|
|
|
/* Set the LineCTL quintuplet based on adapter configuration read from EEPROM */ |
|
if ((lp->adapter_cnf & A_CNF_EXTND_10B_2) && |
|
(lp->adapter_cnf & A_CNF_LOW_RX_SQUELCH)) |
|
lp->linectl = LOW_RX_SQUELCH; |
|
else |
|
lp->linectl = 0; |
|
|
|
/* check to make sure that they have the "right" hardware available */ |
|
switch (lp->adapter_cnf & A_CNF_MEDIA_TYPE) { |
|
case A_CNF_MEDIA_10B_T: |
|
result = lp->adapter_cnf & A_CNF_10B_T; |
|
break; |
|
case A_CNF_MEDIA_AUI: |
|
result = lp->adapter_cnf & A_CNF_AUI; |
|
break; |
|
case A_CNF_MEDIA_10B_2: |
|
result = lp->adapter_cnf & A_CNF_10B_2; |
|
break; |
|
default: |
|
result = lp->adapter_cnf & (A_CNF_10B_T | |
|
A_CNF_AUI | |
|
A_CNF_10B_2); |
|
} |
|
if (!result) { |
|
pr_err("%s: EEPROM is configured for unavailable media\n", |
|
dev->name); |
|
release_dma: |
|
#if ALLOW_DMA |
|
free_dma(dev->dma); |
|
release_irq: |
|
release_dma_buff(lp); |
|
#endif |
|
writereg(dev, PP_LineCTL, |
|
readreg(dev, PP_LineCTL) & ~(SERIAL_TX_ON | SERIAL_RX_ON)); |
|
free_irq(dev->irq, dev); |
|
ret = -EAGAIN; |
|
goto bad_out; |
|
} |
|
|
|
/* set the hardware to the configured choice */ |
|
switch (lp->adapter_cnf & A_CNF_MEDIA_TYPE) { |
|
case A_CNF_MEDIA_10B_T: |
|
result = detect_tp(dev); |
|
if (result == DETECTED_NONE) { |
|
pr_warn("%s: 10Base-T (RJ-45) has no cable\n", |
|
dev->name); |
|
if (lp->auto_neg_cnf & IMM_BIT) /* check "ignore missing media" bit */ |
|
result = DETECTED_RJ45H; /* Yes! I don't care if I see a link pulse */ |
|
} |
|
break; |
|
case A_CNF_MEDIA_AUI: |
|
result = detect_aui(dev); |
|
if (result == DETECTED_NONE) { |
|
pr_warn("%s: 10Base-5 (AUI) has no cable\n", dev->name); |
|
if (lp->auto_neg_cnf & IMM_BIT) /* check "ignore missing media" bit */ |
|
result = DETECTED_AUI; /* Yes! I don't care if I see a carrrier */ |
|
} |
|
break; |
|
case A_CNF_MEDIA_10B_2: |
|
result = detect_bnc(dev); |
|
if (result == DETECTED_NONE) { |
|
pr_warn("%s: 10Base-2 (BNC) has no cable\n", dev->name); |
|
if (lp->auto_neg_cnf & IMM_BIT) /* check "ignore missing media" bit */ |
|
result = DETECTED_BNC; /* Yes! I don't care if I can xmit a packet */ |
|
} |
|
break; |
|
case A_CNF_MEDIA_AUTO: |
|
writereg(dev, PP_LineCTL, lp->linectl | AUTO_AUI_10BASET); |
|
if (lp->adapter_cnf & A_CNF_10B_T) { |
|
result = detect_tp(dev); |
|
if (result != DETECTED_NONE) |
|
break; |
|
} |
|
if (lp->adapter_cnf & A_CNF_AUI) { |
|
result = detect_aui(dev); |
|
if (result != DETECTED_NONE) |
|
break; |
|
} |
|
if (lp->adapter_cnf & A_CNF_10B_2) { |
|
result = detect_bnc(dev); |
|
if (result != DETECTED_NONE) |
|
break; |
|
} |
|
pr_err("%s: no media detected\n", dev->name); |
|
goto release_dma; |
|
} |
|
switch (result) { |
|
case DETECTED_NONE: |
|
pr_err("%s: no network cable attached to configured media\n", |
|
dev->name); |
|
goto release_dma; |
|
case DETECTED_RJ45H: |
|
pr_info("%s: using half-duplex 10Base-T (RJ-45)\n", dev->name); |
|
break; |
|
case DETECTED_RJ45F: |
|
pr_info("%s: using full-duplex 10Base-T (RJ-45)\n", dev->name); |
|
break; |
|
case DETECTED_AUI: |
|
pr_info("%s: using 10Base-5 (AUI)\n", dev->name); |
|
break; |
|
case DETECTED_BNC: |
|
pr_info("%s: using 10Base-2 (BNC)\n", dev->name); |
|
break; |
|
} |
|
|
|
/* Turn on both receive and transmit operations */ |
|
writereg(dev, PP_LineCTL, |
|
readreg(dev, PP_LineCTL) | SERIAL_RX_ON | SERIAL_TX_ON); |
|
|
|
/* Receive only error free packets addressed to this card */ |
|
lp->rx_mode = 0; |
|
writereg(dev, PP_RxCTL, DEF_RX_ACCEPT); |
|
|
|
lp->curr_rx_cfg = RX_OK_ENBL | RX_CRC_ERROR_ENBL; |
|
|
|
if (lp->isa_config & STREAM_TRANSFER) |
|
lp->curr_rx_cfg |= RX_STREAM_ENBL; |
|
#if ALLOW_DMA |
|
set_dma_cfg(dev); |
|
#endif |
|
writereg(dev, PP_RxCFG, lp->curr_rx_cfg); |
|
|
|
writereg(dev, PP_TxCFG, (TX_LOST_CRS_ENBL | |
|
TX_SQE_ERROR_ENBL | |
|
TX_OK_ENBL | |
|
TX_LATE_COL_ENBL | |
|
TX_JBR_ENBL | |
|
TX_ANY_COL_ENBL | |
|
TX_16_COL_ENBL)); |
|
|
|
writereg(dev, PP_BufCFG, (READY_FOR_TX_ENBL | |
|
RX_MISS_COUNT_OVRFLOW_ENBL | |
|
#if ALLOW_DMA |
|
dma_bufcfg(dev) | |
|
#endif |
|
TX_COL_COUNT_OVRFLOW_ENBL | |
|
TX_UNDERRUN_ENBL)); |
|
|
|
/* now that we've got our act together, enable everything */ |
|
writereg(dev, PP_BusCTL, (ENABLE_IRQ |
|
| (dev->mem_start ? MEMORY_ON : 0) /* turn memory on */ |
|
#if ALLOW_DMA |
|
| dma_busctl(dev) |
|
#endif |
|
)); |
|
netif_start_queue(dev); |
|
cs89_dbg(1, debug, "net_open() succeeded\n"); |
|
return 0; |
|
bad_out: |
|
return ret; |
|
} |
|
|
|
/* The inverse routine to net_open(). */ |
|
static int |
|
net_close(struct net_device *dev) |
|
{ |
|
#if ALLOW_DMA |
|
struct net_local *lp = netdev_priv(dev); |
|
#endif |
|
|
|
netif_stop_queue(dev); |
|
|
|
writereg(dev, PP_RxCFG, 0); |
|
writereg(dev, PP_TxCFG, 0); |
|
writereg(dev, PP_BufCFG, 0); |
|
writereg(dev, PP_BusCTL, 0); |
|
|
|
free_irq(dev->irq, dev); |
|
|
|
#if ALLOW_DMA |
|
if (lp->use_dma && lp->dma) { |
|
free_dma(dev->dma); |
|
release_dma_buff(lp); |
|
} |
|
#endif |
|
|
|
/* Update the statistics here. */ |
|
return 0; |
|
} |
|
|
|
/* Get the current statistics. |
|
* This may be called with the card open or closed. |
|
*/ |
|
static struct net_device_stats * |
|
net_get_stats(struct net_device *dev) |
|
{ |
|
struct net_local *lp = netdev_priv(dev); |
|
unsigned long flags; |
|
|
|
spin_lock_irqsave(&lp->lock, flags); |
|
/* Update the statistics from the device registers. */ |
|
dev->stats.rx_missed_errors += (readreg(dev, PP_RxMiss) >> 6); |
|
dev->stats.collisions += (readreg(dev, PP_TxCol) >> 6); |
|
spin_unlock_irqrestore(&lp->lock, flags); |
|
|
|
return &dev->stats; |
|
} |
|
|
|
static void net_timeout(struct net_device *dev, unsigned int txqueue) |
|
{ |
|
/* If we get here, some higher level has decided we are broken. |
|
There should really be a "kick me" function call instead. */ |
|
cs89_dbg(0, err, "%s: transmit timed out, %s?\n", |
|
dev->name, |
|
tx_done(dev) ? "IRQ conflict" : "network cable problem"); |
|
/* Try to restart the adaptor. */ |
|
netif_wake_queue(dev); |
|
} |
|
|
|
static netdev_tx_t net_send_packet(struct sk_buff *skb, struct net_device *dev) |
|
{ |
|
struct net_local *lp = netdev_priv(dev); |
|
unsigned long flags; |
|
|
|
cs89_dbg(3, debug, "%s: sent %d byte packet of type %x\n", |
|
dev->name, skb->len, |
|
((skb->data[ETH_ALEN + ETH_ALEN] << 8) | |
|
skb->data[ETH_ALEN + ETH_ALEN + 1])); |
|
|
|
/* keep the upload from being interrupted, since we |
|
* ask the chip to start transmitting before the |
|
* whole packet has been completely uploaded. |
|
*/ |
|
|
|
spin_lock_irqsave(&lp->lock, flags); |
|
netif_stop_queue(dev); |
|
|
|
/* initiate a transmit sequence */ |
|
iowrite16(lp->send_cmd, lp->virt_addr + TX_CMD_PORT); |
|
iowrite16(skb->len, lp->virt_addr + TX_LEN_PORT); |
|
|
|
/* Test to see if the chip has allocated memory for the packet */ |
|
if ((readreg(dev, PP_BusST) & READY_FOR_TX_NOW) == 0) { |
|
/* Gasp! It hasn't. But that shouldn't happen since |
|
* we're waiting for TxOk, so return 1 and requeue this packet. |
|
*/ |
|
|
|
spin_unlock_irqrestore(&lp->lock, flags); |
|
cs89_dbg(0, err, "Tx buffer not free!\n"); |
|
return NETDEV_TX_BUSY; |
|
} |
|
/* Write the contents of the packet */ |
|
writewords(lp, TX_FRAME_PORT, skb->data, (skb->len + 1) >> 1); |
|
spin_unlock_irqrestore(&lp->lock, flags); |
|
dev->stats.tx_bytes += skb->len; |
|
dev_consume_skb_any(skb); |
|
|
|
/* We DO NOT call netif_wake_queue() here. |
|
* We also DO NOT call netif_start_queue(). |
|
* |
|
* Either of these would cause another bottom half run through |
|
* net_send_packet() before this packet has fully gone out. |
|
* That causes us to hit the "Gasp!" above and the send is rescheduled. |
|
* it runs like a dog. We just return and wait for the Tx completion |
|
* interrupt handler to restart the netdevice layer |
|
*/ |
|
|
|
return NETDEV_TX_OK; |
|
} |
|
|
|
static void set_multicast_list(struct net_device *dev) |
|
{ |
|
struct net_local *lp = netdev_priv(dev); |
|
unsigned long flags; |
|
u16 cfg; |
|
|
|
spin_lock_irqsave(&lp->lock, flags); |
|
if (dev->flags & IFF_PROMISC) |
|
lp->rx_mode = RX_ALL_ACCEPT; |
|
else if ((dev->flags & IFF_ALLMULTI) || !netdev_mc_empty(dev)) |
|
/* The multicast-accept list is initialized to accept-all, |
|
* and we rely on higher-level filtering for now. |
|
*/ |
|
lp->rx_mode = RX_MULTCAST_ACCEPT; |
|
else |
|
lp->rx_mode = 0; |
|
|
|
writereg(dev, PP_RxCTL, DEF_RX_ACCEPT | lp->rx_mode); |
|
|
|
/* in promiscuous mode, we accept errored packets, |
|
* so we have to enable interrupts on them also |
|
*/ |
|
cfg = lp->curr_rx_cfg; |
|
if (lp->rx_mode == RX_ALL_ACCEPT) |
|
cfg |= RX_CRC_ERROR_ENBL | RX_RUNT_ENBL | RX_EXTRA_DATA_ENBL; |
|
writereg(dev, PP_RxCFG, cfg); |
|
spin_unlock_irqrestore(&lp->lock, flags); |
|
} |
|
|
|
static int set_mac_address(struct net_device *dev, void *p) |
|
{ |
|
int i; |
|
struct sockaddr *addr = p; |
|
|
|
if (netif_running(dev)) |
|
return -EBUSY; |
|
|
|
memcpy(dev->dev_addr, addr->sa_data, dev->addr_len); |
|
|
|
cs89_dbg(0, debug, "%s: Setting MAC address to %pM\n", |
|
dev->name, dev->dev_addr); |
|
|
|
/* set the Ethernet address */ |
|
for (i = 0; i < ETH_ALEN / 2; i++) |
|
writereg(dev, PP_IA + i * 2, |
|
(dev->dev_addr[i * 2] | |
|
(dev->dev_addr[i * 2 + 1] << 8))); |
|
|
|
return 0; |
|
} |
|
|
|
#ifdef CONFIG_NET_POLL_CONTROLLER |
|
/* |
|
* Polling receive - used by netconsole and other diagnostic tools |
|
* to allow network i/o with interrupts disabled. |
|
*/ |
|
static void net_poll_controller(struct net_device *dev) |
|
{ |
|
disable_irq(dev->irq); |
|
net_interrupt(dev->irq, dev); |
|
enable_irq(dev->irq); |
|
} |
|
#endif |
|
|
|
static const struct net_device_ops net_ops = { |
|
.ndo_open = net_open, |
|
.ndo_stop = net_close, |
|
.ndo_tx_timeout = net_timeout, |
|
.ndo_start_xmit = net_send_packet, |
|
.ndo_get_stats = net_get_stats, |
|
.ndo_set_rx_mode = set_multicast_list, |
|
.ndo_set_mac_address = set_mac_address, |
|
#ifdef CONFIG_NET_POLL_CONTROLLER |
|
.ndo_poll_controller = net_poll_controller, |
|
#endif |
|
.ndo_validate_addr = eth_validate_addr, |
|
}; |
|
|
|
static void __init reset_chip(struct net_device *dev) |
|
{ |
|
#if !defined(CONFIG_MACH_MX31ADS) |
|
struct net_local *lp = netdev_priv(dev); |
|
unsigned long reset_start_time; |
|
|
|
writereg(dev, PP_SelfCTL, readreg(dev, PP_SelfCTL) | POWER_ON_RESET); |
|
|
|
/* wait 30 ms */ |
|
msleep(30); |
|
|
|
if (lp->chip_type != CS8900) { |
|
/* Hardware problem requires PNP registers to be reconfigured after a reset */ |
|
iowrite16(PP_CS8920_ISAINT, lp->virt_addr + ADD_PORT); |
|
iowrite8(dev->irq, lp->virt_addr + DATA_PORT); |
|
iowrite8(0, lp->virt_addr + DATA_PORT + 1); |
|
|
|
iowrite16(PP_CS8920_ISAMemB, lp->virt_addr + ADD_PORT); |
|
iowrite8((dev->mem_start >> 16) & 0xff, |
|
lp->virt_addr + DATA_PORT); |
|
iowrite8((dev->mem_start >> 8) & 0xff, |
|
lp->virt_addr + DATA_PORT + 1); |
|
} |
|
|
|
/* Wait until the chip is reset */ |
|
reset_start_time = jiffies; |
|
while ((readreg(dev, PP_SelfST) & INIT_DONE) == 0 && |
|
time_before(jiffies, reset_start_time + 2)) |
|
; |
|
#endif /* !CONFIG_MACH_MX31ADS */ |
|
} |
|
|
|
/* This is the real probe routine. |
|
* Linux has a history of friendly device probes on the ISA bus. |
|
* A good device probes avoids doing writes, and |
|
* verifies that the correct device exists and functions. |
|
* Return 0 on success. |
|
*/ |
|
static int __init |
|
cs89x0_probe1(struct net_device *dev, void __iomem *ioaddr, int modular) |
|
{ |
|
struct net_local *lp = netdev_priv(dev); |
|
int i; |
|
int tmp; |
|
unsigned rev_type = 0; |
|
int eeprom_buff[CHKSUM_LEN]; |
|
int retval; |
|
|
|
/* Initialize the device structure. */ |
|
if (!modular) { |
|
memset(lp, 0, sizeof(*lp)); |
|
spin_lock_init(&lp->lock); |
|
#ifndef MODULE |
|
#if ALLOW_DMA |
|
if (g_cs89x0_dma) { |
|
lp->use_dma = 1; |
|
lp->dma = g_cs89x0_dma; |
|
lp->dmasize = 16; /* Could make this an option... */ |
|
} |
|
#endif |
|
lp->force = g_cs89x0_media__force; |
|
#endif |
|
} |
|
|
|
pr_debug("PP_addr at %p[%x]: 0x%x\n", |
|
ioaddr, ADD_PORT, ioread16(ioaddr + ADD_PORT)); |
|
iowrite16(PP_ChipID, ioaddr + ADD_PORT); |
|
|
|
tmp = ioread16(ioaddr + DATA_PORT); |
|
if (tmp != CHIP_EISA_ID_SIG) { |
|
pr_debug("%s: incorrect signature at %p[%x]: 0x%x!=" |
|
CHIP_EISA_ID_SIG_STR "\n", |
|
dev->name, ioaddr, DATA_PORT, tmp); |
|
retval = -ENODEV; |
|
goto out1; |
|
} |
|
|
|
lp->virt_addr = ioaddr; |
|
|
|
/* get the chip type */ |
|
rev_type = readreg(dev, PRODUCT_ID_ADD); |
|
lp->chip_type = rev_type & ~REVISON_BITS; |
|
lp->chip_revision = ((rev_type & REVISON_BITS) >> 8) + 'A'; |
|
|
|
/* Check the chip type and revision in order to set the correct |
|
* send command. CS8920 revision C and CS8900 revision F can use |
|
* the faster send. |
|
*/ |
|
lp->send_cmd = TX_AFTER_381; |
|
if (lp->chip_type == CS8900 && lp->chip_revision >= 'F') |
|
lp->send_cmd = TX_NOW; |
|
if (lp->chip_type != CS8900 && lp->chip_revision >= 'C') |
|
lp->send_cmd = TX_NOW; |
|
|
|
pr_info_once("%s\n", version); |
|
|
|
pr_info("%s: cs89%c0%s rev %c found at %p ", |
|
dev->name, |
|
lp->chip_type == CS8900 ? '0' : '2', |
|
lp->chip_type == CS8920M ? "M" : "", |
|
lp->chip_revision, |
|
lp->virt_addr); |
|
|
|
reset_chip(dev); |
|
|
|
/* Here we read the current configuration of the chip. |
|
* If there is no Extended EEPROM then the idea is to not disturb |
|
* the chip configuration, it should have been correctly setup by |
|
* automatic EEPROM read on reset. So, if the chip says it read |
|
* the EEPROM the driver will always do *something* instead of |
|
* complain that adapter_cnf is 0. |
|
*/ |
|
|
|
if ((readreg(dev, PP_SelfST) & (EEPROM_OK | EEPROM_PRESENT)) == |
|
(EEPROM_OK | EEPROM_PRESENT)) { |
|
/* Load the MAC. */ |
|
for (i = 0; i < ETH_ALEN / 2; i++) { |
|
unsigned int Addr; |
|
Addr = readreg(dev, PP_IA + i * 2); |
|
dev->dev_addr[i * 2] = Addr & 0xFF; |
|
dev->dev_addr[i * 2 + 1] = Addr >> 8; |
|
} |
|
|
|
/* Load the Adapter Configuration. |
|
* Note: Barring any more specific information from some |
|
* other source (ie EEPROM+Schematics), we would not know |
|
* how to operate a 10Base2 interface on the AUI port. |
|
* However, since we do read the status of HCB1 and use |
|
* settings that always result in calls to control_dc_dc(dev,0) |
|
* a BNC interface should work if the enable pin |
|
* (dc/dc converter) is on HCB1. |
|
* It will be called AUI however. |
|
*/ |
|
|
|
lp->adapter_cnf = 0; |
|
i = readreg(dev, PP_LineCTL); |
|
/* Preserve the setting of the HCB1 pin. */ |
|
if ((i & (HCB1 | HCB1_ENBL)) == (HCB1 | HCB1_ENBL)) |
|
lp->adapter_cnf |= A_CNF_DC_DC_POLARITY; |
|
/* Save the sqelch bit */ |
|
if ((i & LOW_RX_SQUELCH) == LOW_RX_SQUELCH) |
|
lp->adapter_cnf |= A_CNF_EXTND_10B_2 | A_CNF_LOW_RX_SQUELCH; |
|
/* Check if the card is in 10Base-t only mode */ |
|
if ((i & (AUI_ONLY | AUTO_AUI_10BASET)) == 0) |
|
lp->adapter_cnf |= A_CNF_10B_T | A_CNF_MEDIA_10B_T; |
|
/* Check if the card is in AUI only mode */ |
|
if ((i & (AUI_ONLY | AUTO_AUI_10BASET)) == AUI_ONLY) |
|
lp->adapter_cnf |= A_CNF_AUI | A_CNF_MEDIA_AUI; |
|
/* Check if the card is in Auto mode. */ |
|
if ((i & (AUI_ONLY | AUTO_AUI_10BASET)) == AUTO_AUI_10BASET) |
|
lp->adapter_cnf |= A_CNF_AUI | A_CNF_10B_T | |
|
A_CNF_MEDIA_AUI | A_CNF_MEDIA_10B_T | A_CNF_MEDIA_AUTO; |
|
|
|
cs89_dbg(1, info, "%s: PP_LineCTL=0x%x, adapter_cnf=0x%x\n", |
|
dev->name, i, lp->adapter_cnf); |
|
|
|
/* IRQ. Other chips already probe, see below. */ |
|
if (lp->chip_type == CS8900) |
|
lp->isa_config = readreg(dev, PP_CS8900_ISAINT) & INT_NO_MASK; |
|
|
|
pr_cont("[Cirrus EEPROM] "); |
|
} |
|
|
|
pr_cont("\n"); |
|
|
|
/* First check to see if an EEPROM is attached. */ |
|
|
|
if ((readreg(dev, PP_SelfST) & EEPROM_PRESENT) == 0) |
|
pr_warn("No EEPROM, relying on command line....\n"); |
|
else if (get_eeprom_data(dev, START_EEPROM_DATA, CHKSUM_LEN, eeprom_buff) < 0) { |
|
pr_warn("EEPROM read failed, relying on command line\n"); |
|
} else if (get_eeprom_cksum(START_EEPROM_DATA, CHKSUM_LEN, eeprom_buff) < 0) { |
|
/* Check if the chip was able to read its own configuration starting |
|
at 0 in the EEPROM*/ |
|
if ((readreg(dev, PP_SelfST) & (EEPROM_OK | EEPROM_PRESENT)) != |
|
(EEPROM_OK | EEPROM_PRESENT)) |
|
pr_warn("Extended EEPROM checksum bad and no Cirrus EEPROM, relying on command line\n"); |
|
|
|
} else { |
|
/* This reads an extended EEPROM that is not documented |
|
* in the CS8900 datasheet. |
|
*/ |
|
|
|
/* get transmission control word but keep the autonegotiation bits */ |
|
if (!lp->auto_neg_cnf) |
|
lp->auto_neg_cnf = eeprom_buff[AUTO_NEG_CNF_OFFSET / 2]; |
|
/* Store adapter configuration */ |
|
if (!lp->adapter_cnf) |
|
lp->adapter_cnf = eeprom_buff[ADAPTER_CNF_OFFSET / 2]; |
|
/* Store ISA configuration */ |
|
lp->isa_config = eeprom_buff[ISA_CNF_OFFSET / 2]; |
|
dev->mem_start = eeprom_buff[PACKET_PAGE_OFFSET / 2] << 8; |
|
|
|
/* eeprom_buff has 32-bit ints, so we can't just memcpy it */ |
|
/* store the initial memory base address */ |
|
for (i = 0; i < ETH_ALEN / 2; i++) { |
|
dev->dev_addr[i * 2] = eeprom_buff[i]; |
|
dev->dev_addr[i * 2 + 1] = eeprom_buff[i] >> 8; |
|
} |
|
cs89_dbg(1, debug, "%s: new adapter_cnf: 0x%x\n", |
|
dev->name, lp->adapter_cnf); |
|
} |
|
|
|
/* allow them to force multiple transceivers. If they force multiple, autosense */ |
|
{ |
|
int count = 0; |
|
if (lp->force & FORCE_RJ45) { |
|
lp->adapter_cnf |= A_CNF_10B_T; |
|
count++; |
|
} |
|
if (lp->force & FORCE_AUI) { |
|
lp->adapter_cnf |= A_CNF_AUI; |
|
count++; |
|
} |
|
if (lp->force & FORCE_BNC) { |
|
lp->adapter_cnf |= A_CNF_10B_2; |
|
count++; |
|
} |
|
if (count > 1) |
|
lp->adapter_cnf |= A_CNF_MEDIA_AUTO; |
|
else if (lp->force & FORCE_RJ45) |
|
lp->adapter_cnf |= A_CNF_MEDIA_10B_T; |
|
else if (lp->force & FORCE_AUI) |
|
lp->adapter_cnf |= A_CNF_MEDIA_AUI; |
|
else if (lp->force & FORCE_BNC) |
|
lp->adapter_cnf |= A_CNF_MEDIA_10B_2; |
|
} |
|
|
|
cs89_dbg(1, debug, "%s: after force 0x%x, adapter_cnf=0x%x\n", |
|
dev->name, lp->force, lp->adapter_cnf); |
|
|
|
/* FIXME: We don't let you set dc-dc polarity or low RX squelch from the command line: add it here */ |
|
|
|
/* FIXME: We don't let you set the IMM bit from the command line: add it to lp->auto_neg_cnf here */ |
|
|
|
/* FIXME: we don't set the Ethernet address on the command line. Use |
|
* ifconfig IFACE hw ether AABBCCDDEEFF |
|
*/ |
|
|
|
pr_info("media %s%s%s", |
|
(lp->adapter_cnf & A_CNF_10B_T) ? "RJ-45," : "", |
|
(lp->adapter_cnf & A_CNF_AUI) ? "AUI," : "", |
|
(lp->adapter_cnf & A_CNF_10B_2) ? "BNC," : ""); |
|
|
|
lp->irq_map = 0xffff; |
|
|
|
/* If this is a CS8900 then no pnp soft */ |
|
if (lp->chip_type != CS8900 && |
|
/* Check if the ISA IRQ has been set */ |
|
(i = readreg(dev, PP_CS8920_ISAINT) & 0xff, |
|
(i != 0 && i < CS8920_NO_INTS))) { |
|
if (!dev->irq) |
|
dev->irq = i; |
|
} else { |
|
i = lp->isa_config & INT_NO_MASK; |
|
#ifndef CONFIG_CS89x0_PLATFORM |
|
if (lp->chip_type == CS8900) { |
|
/* Translate the IRQ using the IRQ mapping table. */ |
|
if (i >= ARRAY_SIZE(cs8900_irq_map)) |
|
pr_err("invalid ISA interrupt number %d\n", i); |
|
else |
|
i = cs8900_irq_map[i]; |
|
|
|
lp->irq_map = CS8900_IRQ_MAP; /* fixed IRQ map for CS8900 */ |
|
} else { |
|
int irq_map_buff[IRQ_MAP_LEN/2]; |
|
|
|
if (get_eeprom_data(dev, IRQ_MAP_EEPROM_DATA, |
|
IRQ_MAP_LEN / 2, |
|
irq_map_buff) >= 0) { |
|
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; |
|
} |
|
|
|
pr_cont(" IRQ %d", dev->irq); |
|
|
|
#if ALLOW_DMA |
|
if (lp->use_dma) { |
|
get_dma_channel(dev); |
|
pr_cont(", DMA %d", dev->dma); |
|
} else |
|
#endif |
|
pr_cont(", programmed I/O"); |
|
|
|
/* print the ethernet address. */ |
|
pr_cont(", MAC %pM\n", dev->dev_addr); |
|
|
|
dev->netdev_ops = &net_ops; |
|
dev->watchdog_timeo = HZ; |
|
|
|
cs89_dbg(0, info, "cs89x0_probe1() successful\n"); |
|
|
|
retval = register_netdev(dev); |
|
if (retval) |
|
goto out2; |
|
return 0; |
|
out2: |
|
iowrite16(PP_ChipID, lp->virt_addr + ADD_PORT); |
|
out1: |
|
return retval; |
|
} |
|
|
|
#ifndef CONFIG_CS89x0_PLATFORM |
|
/* |
|
* This function converts the I/O port address used by the cs89x0_probe() and |
|
* init_module() functions to the I/O memory address used by the |
|
* cs89x0_probe1() function. |
|
*/ |
|
static int __init |
|
cs89x0_ioport_probe(struct net_device *dev, unsigned long ioport, int modular) |
|
{ |
|
struct net_local *lp = netdev_priv(dev); |
|
int ret; |
|
void __iomem *io_mem; |
|
|
|
if (!lp) |
|
return -ENOMEM; |
|
|
|
dev->base_addr = ioport; |
|
|
|
if (!request_region(ioport, NETCARD_IO_EXTENT, DRV_NAME)) { |
|
ret = -EBUSY; |
|
goto out; |
|
} |
|
|
|
io_mem = ioport_map(ioport & ~3, NETCARD_IO_EXTENT); |
|
if (!io_mem) { |
|
ret = -ENOMEM; |
|
goto release; |
|
} |
|
|
|
/* if they give us an odd I/O address, then do ONE write to |
|
* the address port, to get it back to address zero, where we |
|
* expect to find the EISA signature word. An IO with a base of 0x3 |
|
* will skip the test for the ADD_PORT. |
|
*/ |
|
if (ioport & 1) { |
|
cs89_dbg(1, info, "%s: odd ioaddr 0x%lx\n", dev->name, ioport); |
|
if ((ioport & 2) != 2) { |
|
if ((ioread16(io_mem + ADD_PORT) & ADD_MASK) != |
|
ADD_SIG) { |
|
pr_err("%s: bad signature 0x%x\n", |
|
dev->name, ioread16(io_mem + ADD_PORT)); |
|
ret = -ENODEV; |
|
goto unmap; |
|
} |
|
} |
|
} |
|
|
|
ret = cs89x0_probe1(dev, io_mem, modular); |
|
if (!ret) |
|
goto out; |
|
unmap: |
|
ioport_unmap(io_mem); |
|
release: |
|
release_region(ioport, NETCARD_IO_EXTENT); |
|
out: |
|
return ret; |
|
} |
|
|
|
#ifndef MODULE |
|
/* Check for a network adaptor of this type, and return '0' iff one exists. |
|
* If dev->base_addr == 0, probe all likely locations. |
|
* If dev->base_addr == 1, always return failure. |
|
* If dev->base_addr == 2, allocate space for the device and return success |
|
* (detachable devices only). |
|
* Return 0 on success. |
|
*/ |
|
|
|
struct net_device * __init cs89x0_probe(int unit) |
|
{ |
|
struct net_device *dev = alloc_etherdev(sizeof(struct net_local)); |
|
unsigned *port; |
|
int err = 0; |
|
int irq; |
|
int io; |
|
|
|
if (!dev) |
|
return ERR_PTR(-ENODEV); |
|
|
|
sprintf(dev->name, "eth%d", unit); |
|
netdev_boot_setup_check(dev); |
|
io = dev->base_addr; |
|
irq = dev->irq; |
|
|
|
cs89_dbg(0, info, "cs89x0_probe(0x%x)\n", io); |
|
|
|
if (io > 0x1ff) { /* Check a single specified location. */ |
|
err = cs89x0_ioport_probe(dev, io, 0); |
|
} else if (io != 0) { /* Don't probe at all. */ |
|
err = -ENXIO; |
|
} else { |
|
for (port = netcard_portlist; *port; port++) { |
|
if (cs89x0_ioport_probe(dev, *port, 0) == 0) |
|
break; |
|
dev->irq = irq; |
|
} |
|
if (!*port) |
|
err = -ENODEV; |
|
} |
|
if (err) |
|
goto out; |
|
return dev; |
|
out: |
|
free_netdev(dev); |
|
pr_warn("no cs8900 or cs8920 detected. Be sure to disable PnP with SETUP\n"); |
|
return ERR_PTR(err); |
|
} |
|
#endif |
|
#endif |
|
|
|
#if defined(MODULE) && !defined(CONFIG_CS89x0_PLATFORM) |
|
|
|
static struct net_device *dev_cs89x0; |
|
|
|
/* Support the 'debug' module parm even if we're compiled for non-debug to |
|
* avoid breaking someone's startup scripts |
|
*/ |
|
|
|
static int io; |
|
static int irq; |
|
static int debug; |
|
static char media[8]; |
|
static int duplex = -1; |
|
|
|
static int use_dma; /* These generate unused var warnings if ALLOW_DMA = 0 */ |
|
static int dma; |
|
static int dmasize = 16; /* or 64 */ |
|
|
|
module_param_hw(io, int, ioport, 0); |
|
module_param_hw(irq, int, irq, 0); |
|
module_param(debug, int, 0); |
|
module_param_string(media, media, sizeof(media), 0); |
|
module_param(duplex, int, 0); |
|
module_param_hw(dma , int, dma, 0); |
|
module_param(dmasize , int, 0); |
|
module_param(use_dma , int, 0); |
|
MODULE_PARM_DESC(io, "cs89x0 I/O base address"); |
|
MODULE_PARM_DESC(irq, "cs89x0 IRQ number"); |
|
#if DEBUGGING |
|
MODULE_PARM_DESC(debug, "cs89x0 debug level (0-6)"); |
|
#else |
|
MODULE_PARM_DESC(debug, "(ignored)"); |
|
#endif |
|
MODULE_PARM_DESC(media, "Set cs89x0 adapter(s) media type(s) (rj45,bnc,aui)"); |
|
/* No other value than -1 for duplex seems to be currently interpreted */ |
|
MODULE_PARM_DESC(duplex, "(ignored)"); |
|
#if ALLOW_DMA |
|
MODULE_PARM_DESC(dma , "cs89x0 ISA DMA channel; ignored if use_dma=0"); |
|
MODULE_PARM_DESC(dmasize , "cs89x0 DMA size in kB (16,64); ignored if use_dma=0"); |
|
MODULE_PARM_DESC(use_dma , "cs89x0 using DMA (0-1)"); |
|
#else |
|
MODULE_PARM_DESC(dma , "(ignored)"); |
|
MODULE_PARM_DESC(dmasize , "(ignored)"); |
|
MODULE_PARM_DESC(use_dma , "(ignored)"); |
|
#endif |
|
|
|
MODULE_AUTHOR("Mike Cruse, Russwll Nelson <[email protected]>, Andrew Morton"); |
|
MODULE_LICENSE("GPL"); |
|
|
|
/* |
|
* media=t - specify media type |
|
* or media=2 |
|
* or media=aui |
|
* or medai=auto |
|
* duplex=0 - specify forced half/full/autonegotiate duplex |
|
* debug=# - debug level |
|
* |
|
* Default Chip Configuration: |
|
* DMA Burst = enabled |
|
* IOCHRDY Enabled = enabled |
|
* UseSA = enabled |
|
* CS8900 defaults to half-duplex if not specified on command-line |
|
* CS8920 defaults to autoneg if not specified on command-line |
|
* Use reset defaults for other config parameters |
|
* |
|
* Assumptions: |
|
* media type specified is supported (circuitry is present) |
|
* if memory address is > 1MB, then required mem decode hw is present |
|
* if 10B-2, then agent other than driver will enable DC/DC converter |
|
* (hw or software util) |
|
*/ |
|
|
|
int __init init_module(void) |
|
{ |
|
struct net_device *dev = alloc_etherdev(sizeof(struct net_local)); |
|
struct net_local *lp; |
|
int ret = 0; |
|
|
|
#if DEBUGGING |
|
net_debug = debug; |
|
#else |
|
debug = 0; |
|
#endif |
|
if (!dev) |
|
return -ENOMEM; |
|
|
|
dev->irq = irq; |
|
dev->base_addr = io; |
|
lp = netdev_priv(dev); |
|
|
|
#if ALLOW_DMA |
|
if (use_dma) { |
|
lp->use_dma = use_dma; |
|
lp->dma = dma; |
|
lp->dmasize = dmasize; |
|
} |
|
#endif |
|
|
|
spin_lock_init(&lp->lock); |
|
|
|
/* boy, they'd better get these right */ |
|
if (!strcmp(media, "rj45")) |
|
lp->adapter_cnf = A_CNF_MEDIA_10B_T | A_CNF_10B_T; |
|
else if (!strcmp(media, "aui")) |
|
lp->adapter_cnf = A_CNF_MEDIA_AUI | A_CNF_AUI; |
|
else if (!strcmp(media, "bnc")) |
|
lp->adapter_cnf = A_CNF_MEDIA_10B_2 | A_CNF_10B_2; |
|
else |
|
lp->adapter_cnf = A_CNF_MEDIA_10B_T | A_CNF_10B_T; |
|
|
|
if (duplex == -1) |
|
lp->auto_neg_cnf = AUTO_NEG_ENABLE; |
|
|
|
if (io == 0) { |
|
pr_err("Module autoprobing not allowed\n"); |
|
pr_err("Append io=0xNNN\n"); |
|
ret = -EPERM; |
|
goto out; |
|
} else if (io <= 0x1ff) { |
|
ret = -ENXIO; |
|
goto out; |
|
} |
|
|
|
#if ALLOW_DMA |
|
if (use_dma && dmasize != 16 && dmasize != 64) { |
|
pr_err("dma size must be either 16K or 64K, not %dK\n", |
|
dmasize); |
|
ret = -EPERM; |
|
goto out; |
|
} |
|
#endif |
|
ret = cs89x0_ioport_probe(dev, io, 1); |
|
if (ret) |
|
goto out; |
|
|
|
dev_cs89x0 = dev; |
|
return 0; |
|
out: |
|
free_netdev(dev); |
|
return ret; |
|
} |
|
|
|
void __exit |
|
cleanup_module(void) |
|
{ |
|
struct net_local *lp = netdev_priv(dev_cs89x0); |
|
|
|
unregister_netdev(dev_cs89x0); |
|
iowrite16(PP_ChipID, lp->virt_addr + ADD_PORT); |
|
ioport_unmap(lp->virt_addr); |
|
release_region(dev_cs89x0->base_addr, NETCARD_IO_EXTENT); |
|
free_netdev(dev_cs89x0); |
|
} |
|
#endif /* MODULE && !CONFIG_CS89x0_PLATFORM */ |
|
|
|
#ifdef CONFIG_CS89x0_PLATFORM |
|
static int __init cs89x0_platform_probe(struct platform_device *pdev) |
|
{ |
|
struct net_device *dev = alloc_etherdev(sizeof(struct net_local)); |
|
void __iomem *virt_addr; |
|
int err; |
|
|
|
if (!dev) |
|
return -ENOMEM; |
|
|
|
dev->irq = platform_get_irq(pdev, 0); |
|
if (dev->irq <= 0) { |
|
dev_warn(&dev->dev, "interrupt resource missing\n"); |
|
err = -ENXIO; |
|
goto free; |
|
} |
|
|
|
virt_addr = devm_platform_ioremap_resource(pdev, 0); |
|
if (IS_ERR(virt_addr)) { |
|
err = PTR_ERR(virt_addr); |
|
goto free; |
|
} |
|
|
|
err = cs89x0_probe1(dev, virt_addr, 0); |
|
if (err) { |
|
dev_warn(&dev->dev, "no cs8900 or cs8920 detected\n"); |
|
goto free; |
|
} |
|
|
|
platform_set_drvdata(pdev, dev); |
|
return 0; |
|
|
|
free: |
|
free_netdev(dev); |
|
return err; |
|
} |
|
|
|
static int cs89x0_platform_remove(struct platform_device *pdev) |
|
{ |
|
struct net_device *dev = platform_get_drvdata(pdev); |
|
|
|
/* This platform_get_resource() call will not return NULL, because |
|
* the same call in cs89x0_platform_probe() has returned a non NULL |
|
* value. |
|
*/ |
|
unregister_netdev(dev); |
|
free_netdev(dev); |
|
return 0; |
|
} |
|
|
|
static const struct of_device_id __maybe_unused cs89x0_match[] = { |
|
{ .compatible = "cirrus,cs8900", }, |
|
{ .compatible = "cirrus,cs8920", }, |
|
{ }, |
|
}; |
|
MODULE_DEVICE_TABLE(of, cs89x0_match); |
|
|
|
static struct platform_driver cs89x0_driver = { |
|
.driver = { |
|
.name = DRV_NAME, |
|
.of_match_table = of_match_ptr(cs89x0_match), |
|
}, |
|
.remove = cs89x0_platform_remove, |
|
}; |
|
|
|
module_platform_driver_probe(cs89x0_driver, cs89x0_platform_probe); |
|
|
|
#endif /* CONFIG_CS89x0_PLATFORM */ |
|
|
|
MODULE_LICENSE("GPL"); |
|
MODULE_DESCRIPTION("Crystal Semiconductor (Now Cirrus Logic) CS89[02]0 network driver"); |
|
MODULE_AUTHOR("Russell Nelson <[email protected]>");
|
|
|