Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2)  * Linux ARCnet driver - "RIM I" (entirely mem-mapped) cards
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  * Written 1994-1999 by Avery Pennarun.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Written 1999-2000 by Martin Mares <mj@ucw.cz>.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  * Derived from skeleton.c by Donald Becker.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  * Special thanks to Contemporary Controls, Inc. (www.ccontrols.com)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9)  *  for sponsoring the further development of this driver.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11)  * **********************
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13)  * The original copyright of skeleton.c was as follows:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15)  * skeleton.c Written 1993 by Donald Becker.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16)  * Copyright 1993 United States Government as represented by the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17)  * Director, National Security Agency.  This software may only be used
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18)  * and distributed according to the terms of the GNU General Public License as
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19)  * modified by SRC, incorporated herein by reference.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21)  * **********************
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23)  * For more details, see drivers/net/arcnet.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25)  * **********************
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) #define pr_fmt(fmt) "arcnet:" KBUILD_MODNAME ": " fmt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) #include <linux/moduleparam.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) #include <linux/ioport.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) #include <linux/delay.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) #include <linux/netdevice.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) #include <linux/memblock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) #include <linux/interrupt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) #include <linux/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) #include "arcdevice.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) #include "com9026.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) /* Internal function declarations */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) static int arcrimi_probe(struct net_device *dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) static int arcrimi_found(struct net_device *dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) static void arcrimi_command(struct net_device *dev, int command);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) static int arcrimi_status(struct net_device *dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) static void arcrimi_setmask(struct net_device *dev, int mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) static int arcrimi_reset(struct net_device *dev, int really_reset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) static void arcrimi_copy_to_card(struct net_device *dev, int bufnum, int offset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 				 void *buf, int count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) static void arcrimi_copy_from_card(struct net_device *dev, int bufnum,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 				   int offset, void *buf, int count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) /* Handy defines for ARCnet specific stuff */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) /* Amount of I/O memory used by the card */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) #define BUFFER_SIZE	(512)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) #define MIRROR_SIZE	(BUFFER_SIZE * 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) /* We cannot probe for a RIM I card; one reason is I don't know how to reset
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64)  * them.  In fact, we can't even get their node ID automatically.  So, we
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65)  * need to be passed a specific shmem address, IRQ, and node ID.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) static int __init arcrimi_probe(struct net_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	if (BUGLVL(D_NORMAL)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 		pr_info("%s\n", "RIM I (entirely mem-mapped) support");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 		pr_info("E-mail me if you actually test the RIM I driver, please!\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 		pr_info("Given: node %02Xh, shmem %lXh, irq %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 			dev->dev_addr[0], dev->mem_start, dev->irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 	if (dev->mem_start <= 0 || dev->irq <= 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 		if (BUGLVL(D_NORMAL))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 			pr_err("No autoprobe for RIM I; you must specify the shmem and irq!\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 		return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 	if (dev->dev_addr[0] == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 		if (BUGLVL(D_NORMAL))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 			pr_err("You need to specify your card's station ID!\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 		return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 	/* Grab the memory region at mem_start for MIRROR_SIZE bytes.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 	 * Later in arcrimi_found() the real size will be determined
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 	 * and this reserve will be released and the correct size
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 	 * will be taken.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 	if (!request_mem_region(dev->mem_start, MIRROR_SIZE, "arcnet (90xx)")) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 		if (BUGLVL(D_NORMAL))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 			pr_notice("Card memory already allocated\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 		return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 	return arcrimi_found(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) static int check_mirror(unsigned long addr, size_t size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	void __iomem *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 	int res = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 	if (!request_mem_region(addr, size, "arcnet (90xx)"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 		return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	p = ioremap(addr, size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	if (p) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 		if (arcnet_readb(p, COM9026_REG_R_STATUS) == TESTvalue)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 			res = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 		else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 			res = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 		iounmap(p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 	release_mem_region(addr, size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	return res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) /* Set up the struct net_device associated with this card.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121)  * Called after probing succeeds.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) static int __init arcrimi_found(struct net_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 	struct arcnet_local *lp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 	unsigned long first_mirror, last_mirror, shmem;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 	void __iomem *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 	int mirror_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 	p = ioremap(dev->mem_start, MIRROR_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	if (!p) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 		release_mem_region(dev->mem_start, MIRROR_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 		arc_printk(D_NORMAL, dev, "Can't ioremap\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 		return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	/* reserve the irq */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 	if (request_irq(dev->irq, arcnet_interrupt, 0, "arcnet (RIM I)", dev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 		iounmap(p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 		release_mem_region(dev->mem_start, MIRROR_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 		arc_printk(D_NORMAL, dev, "Can't get IRQ %d!\n", dev->irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 		return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 	shmem = dev->mem_start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	arcnet_writeb(TESTvalue, p, COM9026_REG_W_INTMASK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 	arcnet_writeb(TESTvalue, p, COM9026_REG_W_COMMAND);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 					/* actually the station/node ID */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 	/* find the real shared memory start/end points, including mirrors */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 	/* guess the actual size of one "memory mirror" - the number of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 	 * bytes between copies of the shared memory.  On most cards, it's
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 	 * 2k (or there are no mirrors at all) but on some, it's 4k.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 	mirror_size = MIRROR_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 	if (arcnet_readb(p, COM9026_REG_R_STATUS) == TESTvalue &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	    check_mirror(shmem - MIRROR_SIZE, MIRROR_SIZE) == 0 &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	    check_mirror(shmem - 2 * MIRROR_SIZE, MIRROR_SIZE) == 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 		mirror_size = 2 * MIRROR_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 	first_mirror = shmem - mirror_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 	while (check_mirror(first_mirror, mirror_size) == 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 		first_mirror -= mirror_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 	first_mirror += mirror_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 	last_mirror = shmem + mirror_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 	while (check_mirror(last_mirror, mirror_size) == 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 		last_mirror += mirror_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 	last_mirror -= mirror_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 	dev->mem_start = first_mirror;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 	dev->mem_end = last_mirror + MIRROR_SIZE - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 	/* initialize the rest of the device structure. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 	lp = netdev_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 	lp->card_name = "RIM I";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 	lp->hw.command = arcrimi_command;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 	lp->hw.status = arcrimi_status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	lp->hw.intmask = arcrimi_setmask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 	lp->hw.reset = arcrimi_reset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 	lp->hw.owner = THIS_MODULE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 	lp->hw.copy_to_card = arcrimi_copy_to_card;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 	lp->hw.copy_from_card = arcrimi_copy_from_card;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 	/* re-reserve the memory region - arcrimi_probe() alloced this reqion
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 	 * but didn't know the real size.  Free that region and then re-get
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 	 * with the correct size.  There is a VERY slim chance this could
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 	 * fail.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 	iounmap(p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 	release_mem_region(shmem, MIRROR_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 	if (!request_mem_region(dev->mem_start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 				dev->mem_end - dev->mem_start + 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 				"arcnet (90xx)")) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 		arc_printk(D_NORMAL, dev, "Card memory already allocated\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 		goto err_free_irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 	lp->mem_start = ioremap(dev->mem_start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 				dev->mem_end - dev->mem_start + 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 	if (!lp->mem_start) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 		arc_printk(D_NORMAL, dev, "Can't remap device memory!\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 		goto err_release_mem;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 	/* get and check the station ID from offset 1 in shmem */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 	dev->dev_addr[0] = arcnet_readb(lp->mem_start, COM9026_REG_R_STATION);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 	arc_printk(D_NORMAL, dev, "ARCnet RIM I: station %02Xh found at IRQ %d, ShMem %lXh (%ld*%d bytes)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 		   dev->dev_addr[0],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 		   dev->irq, dev->mem_start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 		   (dev->mem_end - dev->mem_start + 1) / mirror_size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 		   mirror_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 	err = register_netdev(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 	if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 		goto err_unmap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) err_unmap:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 	iounmap(lp->mem_start);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) err_release_mem:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 	release_mem_region(dev->mem_start, dev->mem_end - dev->mem_start + 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) err_free_irq:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 	free_irq(dev->irq, dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 	return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) /* Do a hardware reset on the card, and set up necessary registers.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235)  * This should be called as little as possible, because it disrupts the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236)  * token on the network (causes a RECON) and requires a significant delay.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238)  * However, it does make sure the card is in a defined state.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) static int arcrimi_reset(struct net_device *dev, int really_reset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 	struct arcnet_local *lp = netdev_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 	void __iomem *ioaddr = lp->mem_start + 0x800;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 	arc_printk(D_INIT, dev, "Resetting %s (status=%02Xh)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 		   dev->name, arcnet_readb(ioaddr, COM9026_REG_R_STATUS));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 	if (really_reset) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 		arcnet_writeb(TESTvalue, ioaddr, -0x800);	/* fake reset */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 	/* clear flags & end reset */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 	arcnet_writeb(CFLAGScmd | RESETclear, ioaddr, COM9026_REG_W_COMMAND);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 	arcnet_writeb(CFLAGScmd | CONFIGclear, ioaddr, COM9026_REG_W_COMMAND);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 	/* enable extended (512-byte) packets */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 	arcnet_writeb(CONFIGcmd | EXTconf, ioaddr, COM9026_REG_W_COMMAND);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 	/* done!  return success. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) static void arcrimi_setmask(struct net_device *dev, int mask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 	struct arcnet_local *lp = netdev_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 	void __iomem *ioaddr = lp->mem_start + 0x800;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 	arcnet_writeb(mask, ioaddr, COM9026_REG_W_INTMASK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) static int arcrimi_status(struct net_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 	struct arcnet_local *lp = netdev_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 	void __iomem *ioaddr = lp->mem_start + 0x800;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 	return arcnet_readb(ioaddr, COM9026_REG_R_STATUS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) static void arcrimi_command(struct net_device *dev, int cmd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 	struct arcnet_local *lp = netdev_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 	void __iomem *ioaddr = lp->mem_start + 0x800;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 	arcnet_writeb(cmd, ioaddr, COM9026_REG_W_COMMAND);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) static void arcrimi_copy_to_card(struct net_device *dev, int bufnum, int offset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 				 void *buf, int count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 	struct arcnet_local *lp = netdev_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 	void __iomem *memaddr = lp->mem_start + 0x800 + bufnum * 512 + offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 	TIME(dev, "memcpy_toio", count, memcpy_toio(memaddr, buf, count));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) static void arcrimi_copy_from_card(struct net_device *dev, int bufnum,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 				   int offset, void *buf, int count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 	struct arcnet_local *lp = netdev_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 	void __iomem *memaddr = lp->mem_start + 0x800 + bufnum * 512 + offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 	TIME(dev, "memcpy_fromio", count, memcpy_fromio(buf, memaddr, count));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) static int node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) static int io;			/* use the insmod io= irq= node= options */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) static int irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) static char device[9];		/* use eg. device=arc1 to change name */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) module_param(node, int, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) module_param(io, int, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) module_param(irq, int, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) module_param_string(device, device, sizeof(device), 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) static struct net_device *my_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) static int __init arc_rimi_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) 	struct net_device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) 	dev = alloc_arcdev(device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) 	if (!dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) 	if (node && node != 0xff)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) 		dev->dev_addr[0] = node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) 	dev->mem_start = io;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) 	dev->irq = irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) 	if (dev->irq == 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) 		dev->irq = 9;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) 	if (arcrimi_probe(dev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) 		free_netdev(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) 		return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) 	my_dev = dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) static void __exit arc_rimi_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) 	struct net_device *dev = my_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) 	struct arcnet_local *lp = netdev_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) 	unregister_netdev(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) 	iounmap(lp->mem_start);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) 	release_mem_region(dev->mem_start, dev->mem_end - dev->mem_start + 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) 	free_irq(dev->irq, dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) 	free_netdev(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) #ifndef MODULE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) static int __init arcrimi_setup(char *s)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) 	int ints[8];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) 	s = get_options(s, 8, ints);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) 	if (!ints[0])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) 		return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) 	switch (ints[0]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) 	default:		/* ERROR */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) 		pr_err("Too many arguments\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) 		fallthrough;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) 	case 3:		/* Node ID */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) 		node = ints[3];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) 		fallthrough;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) 	case 2:		/* IRQ */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) 		irq = ints[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) 		fallthrough;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) 	case 1:		/* IO address */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) 		io = ints[1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) 	if (*s)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) 		snprintf(device, sizeof(device), "%s", s);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) 	return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) __setup("arcrimi=", arcrimi_setup);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) #endif				/* MODULE */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) module_init(arc_rimi_init)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) module_exit(arc_rimi_exit)