diff options
Diffstat (limited to 'kernel/drivers/net/wireless/libertas/if_cs.c')
| -rw-r--r-- | kernel/drivers/net/wireless/libertas/if_cs.c | 1006 |
1 files changed, 1006 insertions, 0 deletions
diff --git a/kernel/drivers/net/wireless/libertas/if_cs.c b/kernel/drivers/net/wireless/libertas/if_cs.c new file mode 100644 index 000000000..f499efc6a --- /dev/null +++ b/kernel/drivers/net/wireless/libertas/if_cs.c @@ -0,0 +1,1006 @@ +/* + + Driver for the Marvell 8385 based compact flash WLAN cards. + + (C) 2007 by Holger Schurig <hs4233@mail.mn-solutions.de> + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; see the file COPYING. If not, write to + the Free Software Foundation, Inc., 51 Franklin Steet, Fifth Floor, + Boston, MA 02110-1301, USA. + +*/ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/delay.h> +#include <linux/moduleparam.h> +#include <linux/firmware.h> +#include <linux/netdevice.h> + +#include <pcmcia/cistpl.h> +#include <pcmcia/ds.h> + +#include <linux/io.h> + +#define DRV_NAME "libertas_cs" + +#include "decl.h" +#include "defs.h" +#include "dev.h" + + +/********************************************************************/ +/* Module stuff */ +/********************************************************************/ + +MODULE_AUTHOR("Holger Schurig <hs4233@mail.mn-solutions.de>"); +MODULE_DESCRIPTION("Driver for Marvell 83xx compact flash WLAN cards"); +MODULE_LICENSE("GPL"); + + + +/********************************************************************/ +/* Data structures */ +/********************************************************************/ + +struct if_cs_card { + struct pcmcia_device *p_dev; + struct lbs_private *priv; + void __iomem *iobase; + bool align_regs; + u32 model; +}; + + +enum { + MODEL_UNKNOWN = 0x00, + MODEL_8305 = 0x01, + MODEL_8381 = 0x02, + MODEL_8385 = 0x03 +}; + +static const struct lbs_fw_table fw_table[] = { + { MODEL_8305, "libertas/cf8305.bin", NULL }, + { MODEL_8305, "libertas_cs_helper.fw", NULL }, + { MODEL_8381, "libertas/cf8381_helper.bin", "libertas/cf8381.bin" }, + { MODEL_8381, "libertas_cs_helper.fw", "libertas_cs.fw" }, + { MODEL_8385, "libertas/cf8385_helper.bin", "libertas/cf8385.bin" }, + { MODEL_8385, "libertas_cs_helper.fw", "libertas_cs.fw" }, + { 0, NULL, NULL } +}; +MODULE_FIRMWARE("libertas/cf8305.bin"); +MODULE_FIRMWARE("libertas/cf8381_helper.bin"); +MODULE_FIRMWARE("libertas/cf8381.bin"); +MODULE_FIRMWARE("libertas/cf8385_helper.bin"); +MODULE_FIRMWARE("libertas/cf8385.bin"); +MODULE_FIRMWARE("libertas_cs_helper.fw"); +MODULE_FIRMWARE("libertas_cs.fw"); + + +/********************************************************************/ +/* Hardware access */ +/********************************************************************/ + +/* This define enables wrapper functions which allow you + to dump all register accesses. You normally won't this, + except for development */ +/* #define DEBUG_IO */ + +#ifdef DEBUG_IO +static int debug_output = 0; +#else +/* This way the compiler optimizes the printk's away */ +#define debug_output 0 +#endif + +static inline unsigned int if_cs_read8(struct if_cs_card *card, uint reg) +{ + unsigned int val = ioread8(card->iobase + reg); + if (debug_output) + printk(KERN_INFO "inb %08x<%02x\n", reg, val); + return val; +} +static inline unsigned int if_cs_read16(struct if_cs_card *card, uint reg) +{ + unsigned int val = ioread16(card->iobase + reg); + if (debug_output) + printk(KERN_INFO "inw %08x<%04x\n", reg, val); + return val; +} +static inline void if_cs_read16_rep( + struct if_cs_card *card, + uint reg, + void *buf, + unsigned long count) +{ + if (debug_output) + printk(KERN_INFO "insw %08x<(0x%lx words)\n", + reg, count); + ioread16_rep(card->iobase + reg, buf, count); +} + +static inline void if_cs_write8(struct if_cs_card *card, uint reg, u8 val) +{ + if (debug_output) + printk(KERN_INFO "outb %08x>%02x\n", reg, val); + iowrite8(val, card->iobase + reg); +} + +static inline void if_cs_write16(struct if_cs_card *card, uint reg, u16 val) +{ + if (debug_output) + printk(KERN_INFO "outw %08x>%04x\n", reg, val); + iowrite16(val, card->iobase + reg); +} + +static inline void if_cs_write16_rep( + struct if_cs_card *card, + uint reg, + const void *buf, + unsigned long count) +{ + if (debug_output) + printk(KERN_INFO "outsw %08x>(0x%lx words)\n", + reg, count); + iowrite16_rep(card->iobase + reg, buf, count); +} + + +/* + * I know that polling/delaying is frowned upon. However, this procedure + * with polling is needed while downloading the firmware. At this stage, + * the hardware does unfortunately not create any interrupts. + * + * Fortunately, this function is never used once the firmware is in + * the card. :-) + * + * As a reference, see the "Firmware Specification v5.1", page 18 + * and 19. I did not follow their suggested timing to the word, + * but this works nice & fast anyway. + */ +static int if_cs_poll_while_fw_download(struct if_cs_card *card, uint addr, u8 reg) +{ + int i; + + for (i = 0; i < 100000; i++) { + u8 val = if_cs_read8(card, addr); + if (val == reg) + return 0; + udelay(5); + } + return -ETIME; +} + + + +/* + * First the bitmasks for the host/card interrupt/status registers: + */ +#define IF_CS_BIT_TX 0x0001 +#define IF_CS_BIT_RX 0x0002 +#define IF_CS_BIT_COMMAND 0x0004 +#define IF_CS_BIT_RESP 0x0008 +#define IF_CS_BIT_EVENT 0x0010 +#define IF_CS_BIT_MASK 0x001f + + + +/* + * It's not really clear to me what the host status register is for. It + * needs to be set almost in union with "host int cause". The following + * bits from above are used: + * + * IF_CS_BIT_TX driver downloaded a data packet + * IF_CS_BIT_RX driver got a data packet + * IF_CS_BIT_COMMAND driver downloaded a command + * IF_CS_BIT_RESP not used (has some meaning with powerdown) + * IF_CS_BIT_EVENT driver read a host event + */ +#define IF_CS_HOST_STATUS 0x00000000 + +/* + * With the host int cause register can the host (that is, Linux) cause + * an interrupt in the firmware, to tell the firmware about those events: + * + * IF_CS_BIT_TX a data packet has been downloaded + * IF_CS_BIT_RX a received data packet has retrieved + * IF_CS_BIT_COMMAND a firmware block or a command has been downloaded + * IF_CS_BIT_RESP not used (has some meaning with powerdown) + * IF_CS_BIT_EVENT a host event (link lost etc) has been retrieved + */ +#define IF_CS_HOST_INT_CAUSE 0x00000002 + +/* + * The host int mask register is used to enable/disable interrupt. However, + * I have the suspicion that disabled interrupts are lost. + */ +#define IF_CS_HOST_INT_MASK 0x00000004 + +/* + * Used to send or receive data packets: + */ +#define IF_CS_WRITE 0x00000016 +#define IF_CS_WRITE_LEN 0x00000014 +#define IF_CS_READ 0x00000010 +#define IF_CS_READ_LEN 0x00000024 + +/* + * Used to send commands (and to send firmware block) and to + * receive command responses: + */ +#define IF_CS_CMD 0x0000001A +#define IF_CS_CMD_LEN 0x00000018 +#define IF_CS_RESP 0x00000012 +#define IF_CS_RESP_LEN 0x00000030 + +/* + * The card status registers shows what the card/firmware actually + * accepts: + * + * IF_CS_BIT_TX you may send a data packet + * IF_CS_BIT_RX you may retrieve a data packet + * IF_CS_BIT_COMMAND you may send a command + * IF_CS_BIT_RESP you may retrieve a command response + * IF_CS_BIT_EVENT the card has a event for use (link lost, snr low etc) + * + * When reading this register several times, you will get back the same + * results --- with one exception: the IF_CS_BIT_EVENT clear itself + * automatically. + * + * Not that we don't rely on BIT_RX,_BIT_RESP or BIT_EVENT because + * we handle this via the card int cause register. + */ +#define IF_CS_CARD_STATUS 0x00000020 +#define IF_CS_CARD_STATUS_MASK 0x7f00 + +/* + * The card int cause register is used by the card/firmware to notify us + * about the following events: + * + * IF_CS_BIT_TX a data packet has successfully been sentx + * IF_CS_BIT_RX a data packet has been received and can be retrieved + * IF_CS_BIT_COMMAND not used + * IF_CS_BIT_RESP the firmware has a command response for us + * IF_CS_BIT_EVENT the card has a event for use (link lost, snr low etc) + */ +#define IF_CS_CARD_INT_CAUSE 0x00000022 + +/* + * This is used to for handshaking with the card's bootloader/helper image + * to synchronize downloading of firmware blocks. + */ +#define IF_CS_SQ_READ_LOW 0x00000028 +#define IF_CS_SQ_HELPER_OK 0x10 + +/* + * The scratch register tells us ... + * + * IF_CS_SCRATCH_BOOT_OK the bootloader runs + * IF_CS_SCRATCH_HELPER_OK the helper firmware already runs + */ +#define IF_CS_SCRATCH 0x0000003F +#define IF_CS_SCRATCH_BOOT_OK 0x00 +#define IF_CS_SCRATCH_HELPER_OK 0x5a + +/* + * Used to detect ancient chips: + */ +#define IF_CS_PRODUCT_ID 0x0000001C +#define IF_CS_CF8385_B1_REV 0x12 +#define IF_CS_CF8381_B3_REV 0x04 +#define IF_CS_CF8305_B1_REV 0x03 + +/* + * Used to detect other cards than CF8385 since their revisions of silicon + * doesn't match those from CF8385, eg. CF8381 B3 works with this driver. + */ +#define CF8305_MANFID 0x02db +#define CF8305_CARDID 0x8103 +#define CF8381_MANFID 0x02db +#define CF8381_CARDID 0x6064 +#define CF8385_MANFID 0x02df +#define CF8385_CARDID 0x8103 + +/* + * FIXME: just use the 'driver_info' field of 'struct pcmcia_device_id' when + * that gets fixed. Currently there's no way to access it from the probe hook. + */ +static inline u32 get_model(u16 manf_id, u16 card_id) +{ + /* NOTE: keep in sync with if_cs_ids */ + if (manf_id == CF8305_MANFID && card_id == CF8305_CARDID) + return MODEL_8305; + else if (manf_id == CF8381_MANFID && card_id == CF8381_CARDID) + return MODEL_8381; + else if (manf_id == CF8385_MANFID && card_id == CF8385_CARDID) + return MODEL_8385; + return MODEL_UNKNOWN; +} + +/********************************************************************/ +/* I/O and interrupt handling */ +/********************************************************************/ + +static inline void if_cs_enable_ints(struct if_cs_card *card) +{ + lbs_deb_enter(LBS_DEB_CS); + if_cs_write16(card, IF_CS_HOST_INT_MASK, 0); +} + +static inline void if_cs_disable_ints(struct if_cs_card *card) +{ + lbs_deb_enter(LBS_DEB_CS); + if_cs_write16(card, IF_CS_HOST_INT_MASK, IF_CS_BIT_MASK); +} + +/* + * Called from if_cs_host_to_card to send a command to the hardware + */ +static int if_cs_send_cmd(struct lbs_private *priv, u8 *buf, u16 nb) +{ + struct if_cs_card *card = (struct if_cs_card *)priv->card; + int ret = -1; + int loops = 0; + + lbs_deb_enter(LBS_DEB_CS); + if_cs_disable_ints(card); + + /* Is hardware ready? */ + while (1) { + u16 status = if_cs_read16(card, IF_CS_CARD_STATUS); + if (status & IF_CS_BIT_COMMAND) + break; + if (++loops > 100) { + netdev_err(priv->dev, "card not ready for commands\n"); + goto done; + } + mdelay(1); + } + + if_cs_write16(card, IF_CS_CMD_LEN, nb); + + if_cs_write16_rep(card, IF_CS_CMD, buf, nb / 2); + /* Are we supposed to transfer an odd amount of bytes? */ + if (nb & 1) + if_cs_write8(card, IF_CS_CMD, buf[nb-1]); + + /* "Assert the download over interrupt command in the Host + * status register" */ + if_cs_write16(card, IF_CS_HOST_STATUS, IF_CS_BIT_COMMAND); + + /* "Assert the download over interrupt command in the Card + * interrupt case register" */ + if_cs_write16(card, IF_CS_HOST_INT_CAUSE, IF_CS_BIT_COMMAND); + ret = 0; + +done: + if_cs_enable_ints(card); + lbs_deb_leave_args(LBS_DEB_CS, "ret %d", ret); + return ret; +} + +/* + * Called from if_cs_host_to_card to send a data to the hardware + */ +static void if_cs_send_data(struct lbs_private *priv, u8 *buf, u16 nb) +{ + struct if_cs_card *card = (struct if_cs_card *)priv->card; + u16 status; + + lbs_deb_enter(LBS_DEB_CS); + if_cs_disable_ints(card); + + status = if_cs_read16(card, IF_CS_CARD_STATUS); + BUG_ON((status & IF_CS_BIT_TX) == 0); + + if_cs_write16(card, IF_CS_WRITE_LEN, nb); + + /* write even number of bytes, then odd byte if necessary */ + if_cs_write16_rep(card, IF_CS_WRITE, buf, nb / 2); + if (nb & 1) + if_cs_write8(card, IF_CS_WRITE, buf[nb-1]); + + if_cs_write16(card, IF_CS_HOST_STATUS, IF_CS_BIT_TX); + if_cs_write16(card, IF_CS_HOST_INT_CAUSE, IF_CS_BIT_TX); + if_cs_enable_ints(card); + + lbs_deb_leave(LBS_DEB_CS); +} + +/* + * Get the command result out of the card. + */ +static int if_cs_receive_cmdres(struct lbs_private *priv, u8 *data, u32 *len) +{ + unsigned long flags; + int ret = -1; + u16 status; + + lbs_deb_enter(LBS_DEB_CS); + + /* is hardware ready? */ + status = if_cs_read16(priv->card, IF_CS_CARD_STATUS); + if ((status & IF_CS_BIT_RESP) == 0) { + netdev_err(priv->dev, "no cmd response in card\n"); + *len = 0; + goto out; + } + + *len = if_cs_read16(priv->card, IF_CS_RESP_LEN); + if ((*len == 0) || (*len > LBS_CMD_BUFFER_SIZE)) { + netdev_err(priv->dev, + "card cmd buffer has invalid # of bytes (%d)\n", + *len); + goto out; + } + + /* read even number of bytes, then odd byte if necessary */ + if_cs_read16_rep(priv->card, IF_CS_RESP, data, *len/sizeof(u16)); + if (*len & 1) + data[*len-1] = if_cs_read8(priv->card, IF_CS_RESP); + + /* This is a workaround for a firmware that reports too much + * bytes */ + *len -= 8; + ret = 0; + + /* Clear this flag again */ + spin_lock_irqsave(&priv->driver_lock, flags); + priv->dnld_sent = DNLD_RES_RECEIVED; + spin_unlock_irqrestore(&priv->driver_lock, flags); + +out: + lbs_deb_leave_args(LBS_DEB_CS, "ret %d, len %d", ret, *len); + return ret; +} + +static struct sk_buff *if_cs_receive_data(struct lbs_private *priv) +{ + struct sk_buff *skb = NULL; + u16 len; + u8 *data; + + lbs_deb_enter(LBS_DEB_CS); + + len = if_cs_read16(priv->card, IF_CS_READ_LEN); + if (len == 0 || len > MRVDRV_ETH_RX_PACKET_BUFFER_SIZE) { + netdev_err(priv->dev, + "card data buffer has invalid # of bytes (%d)\n", + len); + priv->dev->stats.rx_dropped++; + goto dat_err; + } + + skb = dev_alloc_skb(MRVDRV_ETH_RX_PACKET_BUFFER_SIZE + 2); + if (!skb) + goto out; + skb_put(skb, len); + skb_reserve(skb, 2);/* 16 byte align */ + data = skb->data; + + /* read even number of bytes, then odd byte if necessary */ + if_cs_read16_rep(priv->card, IF_CS_READ, data, len/sizeof(u16)); + if (len & 1) + data[len-1] = if_cs_read8(priv->card, IF_CS_READ); + +dat_err: + if_cs_write16(priv->card, IF_CS_HOST_STATUS, IF_CS_BIT_RX); + if_cs_write16(priv->card, IF_CS_HOST_INT_CAUSE, IF_CS_BIT_RX); + +out: + lbs_deb_leave_args(LBS_DEB_CS, "ret %p", skb); + return skb; +} + +static irqreturn_t if_cs_interrupt(int irq, void *data) +{ + struct if_cs_card *card = data; + struct lbs_private *priv = card->priv; + u16 cause; + + lbs_deb_enter(LBS_DEB_CS); + + /* Ask card interrupt cause register if there is something for us */ + cause = if_cs_read16(card, IF_CS_CARD_INT_CAUSE); + lbs_deb_cs("cause 0x%04x\n", cause); + + if (cause == 0) { + /* Not for us */ + return IRQ_NONE; + } + + if (cause == 0xffff) { + /* Read in junk, the card has probably been removed */ + card->priv->surpriseremoved = 1; + return IRQ_HANDLED; + } + + if (cause & IF_CS_BIT_RX) { + struct sk_buff *skb; + lbs_deb_cs("rx packet\n"); + skb = if_cs_receive_data(priv); + if (skb) + lbs_process_rxed_packet(priv, skb); + } + + if (cause & IF_CS_BIT_TX) { + lbs_deb_cs("tx done\n"); + lbs_host_to_card_done(priv); + } + + if (cause & IF_CS_BIT_RESP) { + unsigned long flags; + u8 i; + + lbs_deb_cs("cmd resp\n"); + spin_lock_irqsave(&priv->driver_lock, flags); + i = (priv->resp_idx == 0) ? 1 : 0; + spin_unlock_irqrestore(&priv->driver_lock, flags); + + BUG_ON(priv->resp_len[i]); + if_cs_receive_cmdres(priv, priv->resp_buf[i], + &priv->resp_len[i]); + + spin_lock_irqsave(&priv->driver_lock, flags); + lbs_notify_command_response(priv, i); + spin_unlock_irqrestore(&priv->driver_lock, flags); + } + + if (cause & IF_CS_BIT_EVENT) { + u16 status = if_cs_read16(priv->card, IF_CS_CARD_STATUS); + if_cs_write16(priv->card, IF_CS_HOST_INT_CAUSE, + IF_CS_BIT_EVENT); + lbs_queue_event(priv, (status & IF_CS_CARD_STATUS_MASK) >> 8); + } + + /* Clear interrupt cause */ + if_cs_write16(card, IF_CS_CARD_INT_CAUSE, cause & IF_CS_BIT_MASK); + + lbs_deb_leave(LBS_DEB_CS); + return IRQ_HANDLED; +} + + + + +/********************************************************************/ +/* Firmware */ +/********************************************************************/ + +/* + * Tries to program the helper firmware. + * + * Return 0 on success + */ +static int if_cs_prog_helper(struct if_cs_card *card, const struct firmware *fw) +{ + int ret = 0; + int sent = 0; + u8 scratch; + + lbs_deb_enter(LBS_DEB_CS); + + /* + * This is the only place where an unaligned register access happens on + * the CF8305 card, therefore for the sake of speed of the driver, we do + * the alignment correction here. + */ + if (card->align_regs) + scratch = if_cs_read16(card, IF_CS_SCRATCH) >> 8; + else + scratch = if_cs_read8(card, IF_CS_SCRATCH); + + /* "If the value is 0x5a, the firmware is already + * downloaded successfully" + */ + if (scratch == IF_CS_SCRATCH_HELPER_OK) + goto done; + + /* "If the value is != 00, it is invalid value of register */ + if (scratch != IF_CS_SCRATCH_BOOT_OK) { + ret = -ENODEV; + goto done; + } + + lbs_deb_cs("helper size %td\n", fw->size); + + /* "Set the 5 bytes of the helper image to 0" */ + /* Not needed, this contains an ARM branch instruction */ + + for (;;) { + /* "the number of bytes to send is 256" */ + int count = 256; + int remain = fw->size - sent; + + if (remain < count) + count = remain; + + /* + * "write the number of bytes to be sent to the I/O Command + * write length register" + */ + if_cs_write16(card, IF_CS_CMD_LEN, count); + + /* "write this to I/O Command port register as 16 bit writes */ + if (count) + if_cs_write16_rep(card, IF_CS_CMD, + &fw->data[sent], + count >> 1); + + /* + * "Assert the download over interrupt command in the Host + * status register" + */ + if_cs_write8(card, IF_CS_HOST_STATUS, IF_CS_BIT_COMMAND); + + /* + * "Assert the download over interrupt command in the Card + * interrupt case register" + */ + if_cs_write16(card, IF_CS_HOST_INT_CAUSE, IF_CS_BIT_COMMAND); + + /* + * "The host polls the Card Status register ... for 50 ms before + * declaring a failure" + */ + ret = if_cs_poll_while_fw_download(card, IF_CS_CARD_STATUS, + IF_CS_BIT_COMMAND); + if (ret < 0) { + pr_err("can't download helper at 0x%x, ret %d\n", + sent, ret); + goto done; + } + + if (count == 0) + break; + + sent += count; + } + +done: + lbs_deb_leave_args(LBS_DEB_CS, "ret %d", ret); + return ret; +} + + +static int if_cs_prog_real(struct if_cs_card *card, const struct firmware *fw) +{ + int ret = 0; + int retry = 0; + int len = 0; + int sent; + + lbs_deb_enter(LBS_DEB_CS); + + lbs_deb_cs("fw size %td\n", fw->size); + + ret = if_cs_poll_while_fw_download(card, IF_CS_SQ_READ_LOW, + IF_CS_SQ_HELPER_OK); + if (ret < 0) { + pr_err("helper firmware doesn't answer\n"); + goto done; + } + + for (sent = 0; sent < fw->size; sent += len) { + len = if_cs_read16(card, IF_CS_SQ_READ_LOW); + if (len & 1) { + retry++; + pr_info("odd, need to retry this firmware block\n"); + } else { + retry = 0; + } + + if (retry > 20) { + pr_err("could not download firmware\n"); + ret = -ENODEV; + goto done; + } + if (retry) { + sent -= len; + } + + + if_cs_write16(card, IF_CS_CMD_LEN, len); + + if_cs_write16_rep(card, IF_CS_CMD, + &fw->data[sent], + (len+1) >> 1); + if_cs_write8(card, IF_CS_HOST_STATUS, IF_CS_BIT_COMMAND); + if_cs_write16(card, IF_CS_HOST_INT_CAUSE, IF_CS_BIT_COMMAND); + + ret = if_cs_poll_while_fw_download(card, IF_CS_CARD_STATUS, + IF_CS_BIT_COMMAND); + if (ret < 0) { + pr_err("can't download firmware at 0x%x\n", sent); + goto done; + } + } + + ret = if_cs_poll_while_fw_download(card, IF_CS_SCRATCH, 0x5a); + if (ret < 0) + pr_err("firmware download failed\n"); + +done: + lbs_deb_leave_args(LBS_DEB_CS, "ret %d", ret); + return ret; +} + +static void if_cs_prog_firmware(struct lbs_private *priv, int ret, + const struct firmware *helper, + const struct firmware *mainfw) +{ + struct if_cs_card *card = priv->card; + + if (ret) { + pr_err("failed to find firmware (%d)\n", ret); + return; + } + + /* Load the firmware */ + ret = if_cs_prog_helper(card, helper); + if (ret == 0 && (card->model != MODEL_8305)) + ret = if_cs_prog_real(card, mainfw); + if (ret) + return; + + /* Now actually get the IRQ */ + ret = request_irq(card->p_dev->irq, if_cs_interrupt, + IRQF_SHARED, DRV_NAME, card); + if (ret) { + pr_err("error in request_irq\n"); + return; + } + + /* + * Clear any interrupt cause that happened while sending + * firmware/initializing card + */ + if_cs_write16(card, IF_CS_CARD_INT_CAUSE, IF_CS_BIT_MASK); + if_cs_enable_ints(card); + + /* And finally bring the card up */ + priv->fw_ready = 1; + if (lbs_start_card(priv) != 0) { + pr_err("could not activate card\n"); + free_irq(card->p_dev->irq, card); + } +} + + +/********************************************************************/ +/* Callback functions for libertas.ko */ +/********************************************************************/ + +/* Send commands or data packets to the card */ +static int if_cs_host_to_card(struct lbs_private *priv, + u8 type, + u8 *buf, + u16 nb) +{ + int ret = -1; + + lbs_deb_enter_args(LBS_DEB_CS, "type %d, bytes %d", type, nb); + + switch (type) { + case MVMS_DAT: + priv->dnld_sent = DNLD_DATA_SENT; + if_cs_send_data(priv, buf, nb); + ret = 0; + break; + case MVMS_CMD: + priv->dnld_sent = DNLD_CMD_SENT; + ret = if_cs_send_cmd(priv, buf, nb); + break; + default: + netdev_err(priv->dev, "%s: unsupported type %d\n", + __func__, type); + } + + lbs_deb_leave_args(LBS_DEB_CS, "ret %d", ret); + return ret; +} + + +static void if_cs_release(struct pcmcia_device *p_dev) +{ + struct if_cs_card *card = p_dev->priv; + + lbs_deb_enter(LBS_DEB_CS); + + free_irq(p_dev->irq, card); + pcmcia_disable_device(p_dev); + if (card->iobase) + ioport_unmap(card->iobase); + + lbs_deb_leave(LBS_DEB_CS); +} + + +static int if_cs_ioprobe(struct pcmcia_device *p_dev, void *priv_data) +{ + p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH; + p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_AUTO; + + if (p_dev->resource[1]->end) { + pr_err("wrong CIS (check number of IO windows)\n"); + return -ENODEV; + } + + /* This reserves IO space but doesn't actually enable it */ + return pcmcia_request_io(p_dev); +} + +static int if_cs_probe(struct pcmcia_device *p_dev) +{ + int ret = -ENOMEM; + unsigned int prod_id; + struct lbs_private *priv; + struct if_cs_card *card; + + lbs_deb_enter(LBS_DEB_CS); + + card = kzalloc(sizeof(struct if_cs_card), GFP_KERNEL); + if (!card) + goto out; + + card->p_dev = p_dev; + p_dev->priv = card; + + p_dev->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_IO; + + if (pcmcia_loop_config(p_dev, if_cs_ioprobe, NULL)) { + pr_err("error in pcmcia_loop_config\n"); + goto out1; + } + + /* + * Allocate an interrupt line. Note that this does not assign + * a handler to the interrupt, unless the 'Handler' member of + * the irq structure is initialized. + */ + if (!p_dev->irq) + goto out1; + + /* Initialize io access */ + card->iobase = ioport_map(p_dev->resource[0]->start, + resource_size(p_dev->resource[0])); + if (!card->iobase) { + pr_err("error in ioport_map\n"); + ret = -EIO; + goto out1; + } + + ret = pcmcia_enable_device(p_dev); + if (ret) { + pr_err("error in pcmcia_enable_device\n"); + goto out2; + } + + /* Finally, report what we've done */ + lbs_deb_cs("irq %d, io %pR", p_dev->irq, p_dev->resource[0]); + + /* + * Most of the libertas cards can do unaligned register access, but some + * weird ones cannot. That's especially true for the CF8305 card. + */ + card->align_regs = false; + + card->model = get_model(p_dev->manf_id, p_dev->card_id); + if (card->model == MODEL_UNKNOWN) { + pr_err("unsupported manf_id 0x%04x / card_id 0x%04x\n", + p_dev->manf_id, p_dev->card_id); + ret = -ENODEV; + goto out2; + } + + /* Check if we have a current silicon */ + prod_id = if_cs_read8(card, IF_CS_PRODUCT_ID); + if (card->model == MODEL_8305) { + card->align_regs = true; + if (prod_id < IF_CS_CF8305_B1_REV) { + pr_err("8305 rev B0 and older are not supported\n"); + ret = -ENODEV; + goto out2; + } + } + + if ((card->model == MODEL_8381) && prod_id < IF_CS_CF8381_B3_REV) { + pr_err("8381 rev B2 and older are not supported\n"); + ret = -ENODEV; + goto out2; + } + + if ((card->model == MODEL_8385) && prod_id < IF_CS_CF8385_B1_REV) { + pr_err("8385 rev B0 and older are not supported\n"); + ret = -ENODEV; + goto out2; + } + + /* Make this card known to the libertas driver */ + priv = lbs_add_card(card, &p_dev->dev); + if (!priv) { + ret = -ENOMEM; + goto out2; + } + + /* Set up fields in lbs_private */ + card->priv = priv; + priv->card = card; + priv->hw_host_to_card = if_cs_host_to_card; + priv->enter_deep_sleep = NULL; + priv->exit_deep_sleep = NULL; + priv->reset_deep_sleep_wakeup = NULL; + + /* Get firmware */ + ret = lbs_get_firmware_async(priv, &p_dev->dev, card->model, fw_table, + if_cs_prog_firmware); + if (ret) { + pr_err("failed to find firmware (%d)\n", ret); + goto out3; + } + + goto out; + +out3: + lbs_remove_card(priv); +out2: + ioport_unmap(card->iobase); +out1: + pcmcia_disable_device(p_dev); +out: + lbs_deb_leave_args(LBS_DEB_CS, "ret %d", ret); + return ret; +} + + +static void if_cs_detach(struct pcmcia_device *p_dev) +{ + struct if_cs_card *card = p_dev->priv; + + lbs_deb_enter(LBS_DEB_CS); + + lbs_stop_card(card->priv); + lbs_remove_card(card->priv); + if_cs_disable_ints(card); + if_cs_release(p_dev); + kfree(card); + + lbs_deb_leave(LBS_DEB_CS); +} + + + +/********************************************************************/ +/* Module initialization */ +/********************************************************************/ + +static const struct pcmcia_device_id if_cs_ids[] = { + PCMCIA_DEVICE_MANF_CARD(CF8305_MANFID, CF8305_CARDID), + PCMCIA_DEVICE_MANF_CARD(CF8381_MANFID, CF8381_CARDID), + PCMCIA_DEVICE_MANF_CARD(CF8385_MANFID, CF8385_CARDID), + /* NOTE: keep in sync with get_model() */ + PCMCIA_DEVICE_NULL, +}; +MODULE_DEVICE_TABLE(pcmcia, if_cs_ids); + +static struct pcmcia_driver lbs_driver = { + .owner = THIS_MODULE, + .name = DRV_NAME, + .probe = if_cs_probe, + .remove = if_cs_detach, + .id_table = if_cs_ids, +}; +module_pcmcia_driver(lbs_driver); |