Linux设备驱动开发详解代码清单.zip

/* cs89x0.c: A Crystal Semiconductor (Now Cirrus Logic) CS89[02]0 * driver for linux. */ /* Written 1996 by Russell Nelson, with reference to skeleton.c written 1993-1994 by Donald Becker. This software may be used and distributed according to the terms of the GNU General Public License, incorporated herein by reference. The author may be reached at nelson@crynwr.com, Crynwr Software, 521 Pleasant Valley Rd., Potsdam, NY 13676 Changelog: Mike Cruse : mcruse@cti-ltd.com : Changes for Linux 2.0 compatibility. : Added dev_id parameter in net_interrupt(), : request_irq() and free_irq(). Just NULL for now. Mike Cruse : Added MOD_INC_USE_COUNT and MOD_DEC_USE_COUNT macros : in net_open() and net_close() so kerneld would know : that the module is in use and wouldn't eject the : driver prematurely. Mike Cruse : Rewrote init_module() and cleanup_module using 8390.c : as an example. Disabled autoprobing in init_module(), : not a good thing to do to other devices while Linux : is running from all accounts. Russ Nelson : Jul 13 1998. Added RxOnly DMA support. Melody Lee : Aug 10 1999. Changes for Linux 2.2.5 compatibility. : email: ethernet@crystal.cirrus.com Alan Cox : Removed 1.2 support, added 2.1 extra counters. Andrew Morton : andrewm@uow.edu.au : Kernel 2.3.48 : Handle kmalloc() failures : Other resource allocation fixes : Add SMP locks : Integrate Russ Nelson's ALLOW_DMA functionality back in. : If ALLOW_DMA is true, make DMA runtime selectable : Folded in changes from Cirrus (Melody Lee : <klee@crystal.cirrus.com>) : Don't call netif_wake_queue() in net_send_packet() : Fixed an out-of-mem bug in dma_rx() : Updated Documentation/networking/cs89x0.txt Andrew Morton : andrewm@uow.edu.au / Kernel 2.3.99-pre1 : Use skb_reserve to longword align IP header (two places) : Remove a delay loop from dma_rx() : Replace '100' with HZ : Clean up a couple of skb API abuses : Added 'cs89x0_dma=N' kernel boot option : Correctly initialise lp->lock in non-module compile Andrew Morton : andrewm@uow.edu.au / Kernel 2.3.99-pre4-1 : MOD_INC/DEC race fix (see : http://www.uwsg.indiana.edu/hypermail/linux/kernel/0003.3/1532.html) Andrew Morton : andrewm@uow.edu.au / Kernel 2.4.0-test7-pre2 : Enhanced EEPROM support to cover more devices, : abstracted IRQ mapping to support CONFIG_ARCH_CLPS7500 arch : (Jason Gunthorpe <jgg@ualberta.ca>) Andrew Morton : Kernel 2.4.0-test11-pre4 : Use dev->name in request_*() (Andrey Panin) : Fix an error-path memleak in init_module() : Preserve return value from request_irq() : Fix type of `media' module parm (Keith Owens) : Use SET_MODULE_OWNER() : Tidied up strange request_irq() abuse in net_open(). Andrew Morton : Kernel 2.4.3-pre1 : Request correct number of pages for DMA (Hugh Dickens) : Select PP_ChipID _after_ unregister_netdev in cleanup_module() : because unregister_netdev() calls get_stats. : Make `version[]' __initdata : Uninlined the read/write reg/word functions. 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 Dmitry Pervushin : dpervushin@ru.mvista.com : PNX010X platform support Deepak Saxena : dsaxena@plexity.net : Intel IXDP2351 platform support Dmitry Pervushin : dpervushin@ru.mvista.com : PNX010X platform support */ /* Always include 'config.h' first in case the user wants to turn on or override something. */ #include <linux/config.h> #include <linux/module.h> /* * Set this to zero to disable DMA code * * 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_ISA_DMA_API #define ALLOW_DMA 0 #else #define ALLOW_DMA 1 #endif /* * Set this to zero to remove all the debug statements via * dead code elimination */ #define DEBUGGING 1 /* Sources: Crynwr packet driver epktisa. Crystal Semiconductor data sheets. */ #include <linux/errno.h> #include <linux/netdevice.h> #include <linux/etherdevice.h> #include <linux/kernel.h> #include <linux/types.h> #include <linux/fcntl.h> #include <linux/interrupt.h> #include <linux/ioport.h> #include <linux/in.h> #include <linux/skbuff.h> #include <linux/slab.h> #include <linux/spinlock.h> #include <linux/string.h> #include <linux/init.h> #include <linux/bitops.h> #include <linux/delay.h> #include <asm/system.h> #include <asm/io.h> #include <asm/irq.h> #if ALLOW_DMA #include <asm/dma.h> #endif #include "cs89x0.h" static char version[] __initdata = "cs89x0.c: v2.4.3-pre1 Russell Nelson <nelson@crynwr.com>, Andrew Morton <andrewm@uow.edu.au>\n"; #define DRV_NAME "cs89x0" /* First, a few definitions that the brave might change. A zero-terminated list of I/O addresses to be probed. Some special flags.. Addr & 1 = Read back the address port, look for signature and reset the page window before probing Addr & 3 = Reset the page window and probe The CLPS eval board has the Cirrus chip at 0x80090300, in ARM IO space, but it is possible that a Cirrus board could be plugged into the ISA slots. */ /* The cs8900 has 4 IRQ pins, software selectable. cs8900_irq_map maps them to system IRQ numbers. This mapping is card specific and is set to the configuration of the Cirrus Eval board for this chip. */ #ifdef CONFIG_ARCH_CLPS7500 static unsigned int netcard_portlist[] __initdata = { 0x80090303, 0x300, 0x320, 0x340, 0x360, 0x200, 0x220, 0x240, 0x260, 0x280, 0x2a0, 0x2c0, 0x2e0, 0}; static unsigned int cs8900_irq_map[] = {12,0,0,0}; #elif defined(CONFIG_SH_HICOSH4) static unsigned int netcard_portlist[] __initdata = { 0x0300, 0}; static unsigned int cs8900_irq_map[] = {1,0,0,0}; #elif defined(CONFIG_MACH_IXDP2351) static unsigned int netcard_portlist[] __initdata = {IXDP2351_VIRT_CS8900_BASE, 0}; static unsigned int cs8900_irq_map[] = {IRQ_IXDP2351_CS8900, 0, 0, 0}; #include <asm/irq.h> #elif defined(CONFIG_ARCH_IXDP2X01) #include <asm/irq.h> static unsigned int netcard_portlist[] __initdata = {IXDP2X01_CS8900_VIRT_BASE, 0}; static unsigned int cs8900_irq_map[] = {IRQ_IXDP2X01_CS8900, 0, 0, 0}; #elif defined(CONFIG_ARCH_PNX010X) #include <asm/irq.h> #include <asm/arch/gpio.h> #define CIRRUS_DEFAULT_BASE IO_ADDRESS(EXT_STATIC2_s0_BASE + 0x200000) /* = Physical address 0x48200000 */ #define CIRRUS_DEFAULT_IRQ VH_INTC_INT_NUM_CASCADED_INTERRUPT_1 /* Event inputs bank 1 - ID 35/bit 3 */ static unsigned int netcard_portlist[] __initdata = {CIRRUS_DEFAULT_BASE, 0}; static unsigned int cs8900_irq_map[] = {CIRRUS_DEFAULT_IRQ, 0, 0, 0}; #else static unsigned int netcard_portlist[] __initdata = { 0x300, 0x320, 0x340, 0x360, 0x200, 0x220, 0x240, 0x260, 0x280, 0x2a0, 0x2c0, 0x2e0, 0}; static unsigned int cs8900_irq_map[] = {10,11,12,5}; #endif #if DEBUGGING static unsigned int net_debug = DEBUGGING; #else #def