The cs89x0 was written by Bonald Becker 1993 to 1994. It is an ISA device, so unlikely to be used with modern kernels. Signed-off-by: Andrew Lunn --- drivers/net/ethernet/cirrus/Kconfig | 30 - drivers/net/ethernet/cirrus/Makefile | 1 - drivers/net/ethernet/cirrus/cs89x0.c | 1915 ---------------------------------- 3 files changed, 1946 deletions(-) diff --git a/drivers/net/ethernet/cirrus/Kconfig b/drivers/net/ethernet/cirrus/Kconfig index 5bdf731d9503..1a0c7b3bfcd6 100644 --- a/drivers/net/ethernet/cirrus/Kconfig +++ b/drivers/net/ethernet/cirrus/Kconfig @@ -17,36 +17,6 @@ config NET_VENDOR_CIRRUS if NET_VENDOR_CIRRUS -config CS89x0 - tristate - -config CS89x0_ISA - tristate "CS89x0 ISA driver support" - depends on HAS_IOPORT_MAP - depends on ISA - depends on !PPC32 - depends on CS89x0_PLATFORM=n - select NETDEV_LEGACY_INIT - select CS89x0 - help - Support for CS89x0 chipset based Ethernet cards. If you have a - network (Ethernet) card of this type, say Y and read the file - . - - To compile this driver as a module, choose M here. The module - will be called cs89x0. - -config CS89x0_PLATFORM - tristate "CS89x0 platform driver support" - depends on ARM || (COMPILE_TEST && !PPC) - select CS89x0 - help - Say Y to compile the cs89x0 platform driver. This makes this driver - suitable for use on certain evaluation boards such as the iMX21ADS. - - To compile this driver as a module, choose M here. The module - will be called cs89x0. - config EP93XX_ETH tristate "EP93xx Ethernet support" depends on (ARM && ARCH_EP93XX) || COMPILE_TEST diff --git a/drivers/net/ethernet/cirrus/Makefile b/drivers/net/ethernet/cirrus/Makefile index 84865e593788..cb740939d976 100644 --- a/drivers/net/ethernet/cirrus/Makefile +++ b/drivers/net/ethernet/cirrus/Makefile @@ -3,6 +3,5 @@ # Makefile for the Cirrus network device drivers. # -obj-$(CONFIG_CS89x0) += cs89x0.o obj-$(CONFIG_EP93XX_ETH) += ep93xx_eth.o obj-$(CONFIG_MAC89x0) += mac89x0.o diff --git a/drivers/net/ethernet/cirrus/cs89x0.c b/drivers/net/ethernet/cirrus/cs89x0.c deleted file mode 100644 index fa5857923db4..000000000000 --- a/drivers/net/ethernet/cirrus/cs89x0.c +++ /dev/null @@ -1,1915 +0,0 @@ -/* 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 - * - * Other contributors: - * Mike Cruse : mcruse@cti-ltd.com - * Russ Nelson - * Melody Lee : ethernet@crystal.cirrus.com - * Alan Cox - * Andrew Morton - * Oskar Schirmer : oskar@scara.com - * Deepak Saxena : dsaxena@plexity.net - * Dmitry Pervushin : dpervushin@ru.mvista.com - * Deepak Saxena : dsaxena@plexity.net - * Domenico Andreoli : cavokz@gmail.com - */ - - -/* - * 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. - */ - -#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include - -#include -#include -#if ALLOW_DMA -#include -#endif - -#include "cs89x0.h" - -#define cs89_dbg(val, level, fmt, ...) \ -do { \ - if (val <= net_debug) \ - pr_##level(fmt, ##__VA_ARGS__); \ -} while (0) - -static char version[] __initdata = - "v2.4.3-pre1 Russell Nelson , Andrew Morton"; - -#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. - */ -#if IS_ENABLED(CONFIG_CS89x0_ISA) -static unsigned int netcard_portlist[] __used __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 -#define net_debug 0 /* gcc will remove all the debug code for us */ -#endif - -/* The number of low I/O ports used by the ethercard. */ -#define NETCARD_IO_EXTENT 16 - -/* we allow the user to override various values normally set in the EEPROM */ -#define FORCE_RJ45 0x0001 /* pick one of these three */ -#define FORCE_AUI 0x0002 -#define FORCE_BNC 0x0004 - -#define FORCE_AUTO 0x0010 /* pick one of these three */ -#define FORCE_HALF 0x0020 -#define FORCE_FULL 0x0030 - -/* Information that need to be kept for each board. */ -struct net_local { - int chip_type; /* one of: CS8900, CS8920, CS8920M */ - char chip_revision; /* revision letter of the chip ('A'...) */ - int send_cmd; /* the proper send command: TX_NOW, TX_AFTER_381, or TX_AFTER_ALL */ - int auto_neg_cnf; /* auto-negotiation word from EEPROM */ - int adapter_cnf; /* adapter configuration from EEPROM */ - int isa_config; /* ISA configuration from EEPROM */ - int irq_map; /* IRQ map from EEPROM */ - int rx_mode; /* what mode are we in? 0, RX_MULTCAST_ACCEPT, or RX_ALL_ACCEPT */ - int curr_rx_cfg; /* a copy of PP_RxCFG */ - int linectl; /* either 0 or LOW_RX_SQUELCH, depending on configuration. */ - int send_underrun; /* keep track of how many underruns in a row we get */ - int force; /* force various values; see FORCE* above. */ - spinlock_t lock; - void __iomem *virt_addr;/* CS89x0 virtual address. */ -#if ALLOW_DMA - int use_dma; /* Flag: we're using dma */ - int dma; /* DMA channel */ - int dmasize; /* 16 or 64 */ - unsigned char *dma_buff; /* points to the beginning of the buffer */ - unsigned char *end_dma_buff; /* points to the end of the buffer */ - unsigned char *rx_dma_ptr; /* points to the next packet */ -#endif -}; - -/* Example routines you must write ;->. */ -#define tx_done(dev) 1 - -/* - * Permit 'cs89x0_dma=N' in the kernel boot environment - */ -#if !defined(MODULE) -#if ALLOW_DMA -static int g_cs89x0_dma; - -static int __init dma_fn(char *str) -{ - g_cs89x0_dma = simple_strtol(str, NULL, 0); - return 1; -} - -__setup("cs89x0_dma=", dma_fn); -#endif /* ALLOW_DMA */ - -static int g_cs89x0_media__force; - -static int __init media_fn(char *str) -{ - if (!strcmp(str, "rj45")) - g_cs89x0_media__force = FORCE_RJ45; - else if (!strcmp(str, "aui")) - g_cs89x0_media__force = FORCE_AUI; - else if (!strcmp(str, "bnc")) - g_cs89x0_media__force = FORCE_BNC; - - return 1; -} - -__setup("cs89x0_media=", media_fn); -#endif - -static void readwords(struct net_local *lp, int portno, void *buf, int length) -{ - u8 *buf8 = (u8 *)buf; - - do { - u16 tmp16; - - tmp16 = ioread16(lp->virt_addr + portno); - *buf8++ = (u8)tmp16; - *buf8++ = (u8)(tmp16 >> 8); - } while (--length); -} - -static void writewords(struct net_local *lp, int portno, void *buf, int length) -{ - u8 *buf8 = (u8 *)buf; - - do { - u16 tmp16; - - tmp16 = *buf8++; - tmp16 |= (*buf8++) << 8; - iowrite16(tmp16, lp->virt_addr + portno); - } while (--length); -} - -static u16 -readreg(struct net_device *dev, u16 regno) -{ - struct net_local *lp = netdev_priv(dev); - - iowrite16(regno, lp->virt_addr + ADD_PORT); - return ioread16(lp->virt_addr + DATA_PORT); -} - -static void -writereg(struct net_device *dev, u16 regno, u16 value) -{ - struct net_local *lp = netdev_priv(dev); - - iowrite16(regno, lp->virt_addr + ADD_PORT); - iowrite16(value, lp->virt_addr + DATA_PORT); -} - -static int __init -wait_eeprom_ready(struct net_device *dev) -{ - unsigned long timeout = jiffies; - /* check to see if the EEPROM is ready, - * a timeout is used just in case EEPROM is ready when - * SI_BUSY in the PP_SelfST is clear - */ - while (readreg(dev, PP_SelfST) & SI_BUSY) - if (time_after_eq(jiffies, timeout + 40)) - return -1; - return 0; -} - -static int __init -get_eeprom_data(struct net_device *dev, int off, int len, int *buffer) -{ - int i; - - cs89_dbg(3, info, "EEPROM data from %x for %x:", off, len); - for (i = 0; i < len; i++) { - if (wait_eeprom_ready(dev) < 0) - return -1; - /* Now send the EEPROM read command and EEPROM location to read */ - writereg(dev, PP_EECMD, (off + i) | EEPROM_READ_CMD); - if (wait_eeprom_ready(dev) < 0) - return -1; - buffer[i] = readreg(dev, PP_EEData); - cs89_dbg(3, cont, " %04x", buffer[i]); - } - cs89_dbg(3, cont, "\n"); - return 0; -} - -static int __init -get_eeprom_cksum(int off, int len, int *buffer) -{ - int i, cksum; - - cksum = 0; - for (i = 0; i < len; i++) - cksum += buffer[i]; - cksum &= 0xffff; - if (cksum == 0) - return 0; - return -1; -} - -static void -write_irq(struct net_device *dev, int chip_type, int irq) -{ - int i; - - if (chip_type == CS8900) { -#if IS_ENABLED(CONFIG_CS89x0_ISA) - /* Search the mapping table for the corresponding IRQ pin. */ - for (i = 0; i != ARRAY_SIZE(cs8900_irq_map); i++) - if (cs8900_irq_map[i] == irq) - break; - /* Not found */ - if (i == ARRAY_SIZE(cs8900_irq_map)) - i = 3; -#else - /* INTRQ0 pin is used for interrupt generation. */ - i = 0; -#endif - writereg(dev, PP_CS8900_ISAINT, i); - } else { - writereg(dev, PP_CS8920_ISAINT, irq); - } -} - -static void -count_rx_errors(int status, struct net_device *dev) -{ - dev->stats.rx_errors++; - if (status & RX_RUNT) - dev->stats.rx_length_errors++; - if (status & RX_EXTRA_DATA) - dev->stats.rx_length_errors++; - if ((status & RX_CRC_ERROR) && !(status & (RX_EXTRA_DATA | RX_RUNT))) - /* per str 172 */ - dev->stats.rx_crc_errors++; - if (status & RX_DRIBBLE) - dev->stats.rx_frame_errors++; -} - -/********************************* - * This page contains DMA routines - *********************************/ - -#if ALLOW_DMA - -#define dma_page_eq(ptr1, ptr2) ((long)(ptr1) >> 17 == (long)(ptr2) >> 17) - -static void -get_dma_channel(struct net_device *dev) -{ - struct net_local *lp = netdev_priv(dev); - - if (lp->dma) { - dev->dma = lp->dma; - lp->isa_config |= ISA_RxDMA; - } else { - if ((lp->isa_config & ANY_ISA_DMA) == 0) - return; - dev->dma = lp->isa_config & DMA_NO_MASK; - if (lp->chip_type == CS8900) - dev->dma += 5; - if (dev->dma < 5 || dev->dma > 7) { - lp->isa_config &= ~ANY_ISA_DMA; - return; - } - } -} - -static void -write_dma(struct net_device *dev, int chip_type, int dma) -{ - struct net_local *lp = netdev_priv(dev); - if ((lp->isa_config & ANY_ISA_DMA) == 0) - return; - if (chip_type == CS8900) - writereg(dev, PP_CS8900_ISADMA, dma - 5); - else - writereg(dev, PP_CS8920_ISADMA, dma); -} - -static void -set_dma_cfg(struct net_device *dev) -{ - struct net_local *lp = netdev_priv(dev); - - if (lp->use_dma) { - if ((lp->isa_config & ANY_ISA_DMA) == 0) { - cs89_dbg(3, err, "set_dma_cfg(): no DMA\n"); - return; - } - if (lp->isa_config & ISA_RxDMA) { - lp->curr_rx_cfg |= RX_DMA_ONLY; - cs89_dbg(3, info, "set_dma_cfg(): RX_DMA_ONLY\n"); - } else { - lp->curr_rx_cfg |= AUTO_RX_DMA; /* not that we support it... */ - cs89_dbg(3, info, "set_dma_cfg(): AUTO_RX_DMA\n"); - } - } -} - -static int -dma_bufcfg(struct net_device *dev) -{ - struct net_local *lp = netdev_priv(dev); - if (lp->use_dma) - return (lp->isa_config & ANY_ISA_DMA) ? RX_DMA_ENBL : 0; - else - return 0; -} - -static int -dma_busctl(struct net_device *dev) -{ - int retval = 0; - struct net_local *lp = netdev_priv(dev); - if (lp->use_dma) { - if (lp->isa_config & ANY_ISA_DMA) - retval |= RESET_RX_DMA; /* Reset the DMA pointer */ - if (lp->isa_config & DMA_BURST) - retval |= DMA_BURST_MODE; /* Does ISA config specify DMA burst ? */ - if (lp->dmasize == 64) - retval |= RX_DMA_SIZE_64K; /* did they ask for 64K? */ - retval |= MEMORY_ON; /* we need memory enabled to use DMA. */ - } - return retval; -} - -static void -dma_rx(struct net_device *dev) -{ - struct net_local *lp = netdev_priv(dev); - struct sk_buff *skb; - int status, length; - unsigned char *bp = lp->rx_dma_ptr; - - status = bp[0] + (bp[1] << 8); - length = bp[2] + (bp[3] << 8); - bp += 4; - - cs89_dbg(5, debug, "%s: receiving DMA packet at %lx, status %x, length %x\n", - dev->name, (unsigned long)bp, status, length); - - if ((status & RX_OK) == 0) { - count_rx_errors(status, dev); - goto skip_this_frame; - } - - /* Malloc up new buffer. */ - skb = netdev_alloc_skb(dev, length + 2); - if (skb == NULL) { - dev->stats.rx_dropped++; - - /* AKPM: advance bp to the next frame */ -skip_this_frame: - bp += (length + 3) & ~3; - if (bp >= lp->end_dma_buff) - bp -= lp->dmasize * 1024; - lp->rx_dma_ptr = bp; - return; - } - skb_reserve(skb, 2); /* longword align L3 header */ - - if (bp + length > lp->end_dma_buff) { - int semi_cnt = lp->end_dma_buff - bp; - skb_put_data(skb, bp, semi_cnt); - skb_put_data(skb, lp->dma_buff, length - semi_cnt); - } else { - skb_put_data(skb, bp, length); - } - bp += (length + 3) & ~3; - if (bp >= lp->end_dma_buff) - bp -= lp->dmasize*1024; - lp->rx_dma_ptr = bp; - - cs89_dbg(3, info, "%s: received %d byte DMA 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; -} - -static void release_dma_buff(struct net_local *lp) -{ - if (lp->dma_buff) { - free_pages((unsigned long)(lp->dma_buff), - get_order(lp->dmasize * 1024)); - lp->dma_buff = NULL; - } -} - -#endif /* ALLOW_DMA */ - -static void -control_dc_dc(struct net_device *dev, int on_not_off) -{ - struct net_local *lp = netdev_priv(dev); - unsigned int selfcontrol; - unsigned long timenow = jiffies; - /* control the DC to DC convertor in the SelfControl register. - * Note: This is hooked up to a general purpose pin, might not - * always be a DC to DC convertor. - */ - - selfcontrol = HCB1_ENBL; /* Enable the HCB1 bit as an output */ - if (((lp->adapter_cnf & A_CNF_DC_DC_POLARITY) != 0) ^ on_not_off) - selfcontrol |= HCB1; - else - selfcontrol &= ~HCB1; - writereg(dev, PP_SelfCTL, selfcontrol); - - /* Wait for the DC/DC converter to power up - 500ms */ - while (time_before(jiffies, timenow + HZ)) - ; -} - -/* send a test packet - return true if carrier bits are ok */ -static int -send_test_pkt(struct net_device *dev) -{ - struct net_local *lp = netdev_priv(dev); - char test_packet[] = { - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 46, /* A 46 in network order */ - 0, 0, /* DSAP=0 & SSAP=0 fields */ - 0xf3, 0 /* Control (Test Req + P bit set) */ - }; - unsigned long timenow = jiffies; - - writereg(dev, PP_LineCTL, readreg(dev, PP_LineCTL) | SERIAL_TX_ON); - - memcpy(test_packet, dev->dev_addr, ETH_ALEN); - memcpy(test_packet + ETH_ALEN, dev->dev_addr, ETH_ALEN); - - iowrite16(TX_AFTER_ALL, lp->virt_addr + TX_CMD_PORT); - iowrite16(ETH_ZLEN, lp->virt_addr + TX_LEN_PORT); - - /* Test to see if the chip has allocated memory for the packet */ - while (time_before(jiffies, timenow + 5)) - if (readreg(dev, PP_BusST) & READY_FOR_TX_NOW) - break; - if (time_after_eq(jiffies, timenow + 5)) - return 0; /* this shouldn't happen */ - - /* Write the contents of the packet */ - writewords(lp, TX_FRAME_PORT, test_packet, (ETH_ZLEN + 1) >> 1); - - cs89_dbg(1, debug, "Sending test packet "); - /* wait a couple of jiffies for packet to be received */ - for (timenow = jiffies; time_before(jiffies, timenow + 3);) - ; - if ((readreg(dev, PP_TxEvent) & TX_SEND_OK_BITS) == TX_OK) { - cs89_dbg(1, cont, "succeeded\n"); - return 1; - } - cs89_dbg(1, cont, "failed\n"); - return 0; -} - -#define DETECTED_NONE 0 -#define DETECTED_RJ45H 1 -#define DETECTED_RJ45F 2 -#define DETECTED_AUI 3 -#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 IS_ENABLED(CONFIG_CS89x0_ISA) - 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 carrier */ - } - 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; - - eth_hw_addr_set(dev, addr->sa_data); - - 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]; - u8 addr[ETH_ALEN]; - 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); - addr[i * 2] = Addr & 0xFF; - addr[i * 2 + 1] = Addr >> 8; - } - eth_hw_addr_set(dev, addr); - - /* 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++) { - addr[i * 2] = eeprom_buff[i]; - addr[i * 2 + 1] = eeprom_buff[i] >> 8; - } - eth_hw_addr_set(dev, addr); - 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; -#if IS_ENABLED(CONFIG_CS89x0_ISA) - 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; -} - -#if IS_ENABLED(CONFIG_CS89x0_ISA) -/* - * 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); -} -#else -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 , 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) - */ - -static int __init cs89x0_isa_init_module(void) -{ - struct net_device *dev; - struct net_local *lp; - int ret = 0; - -#if DEBUGGING - net_debug = debug; -#else - debug = 0; -#endif - dev = alloc_etherdev(sizeof(struct net_local)); - 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; -} -module_init(cs89x0_isa_init_module); - -static void __exit cs89x0_isa_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); -} -module_exit(cs89x0_isa_cleanup_module); -#endif /* MODULE */ -#endif /* CONFIG_CS89x0_ISA */ - -#if IS_ENABLED(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) { - err = dev->irq; - 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 void 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); -} - -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 "); -- 2.53.0