| /* |
| |
| 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. |
| |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/delay.h> |
| #include <linux/moduleparam.h> |
| #include <linux/firmware.h> |
| #include <linux/netdevice.h> |
| |
| #include <pcmcia/cs_types.h> |
| #include <pcmcia/cs.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; |
| }; |
| |
| |
| |
| /********************************************************************/ |
| /* 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 |
| |
| static inline int if_cs_hw_is_cf8305(struct pcmcia_device *p_dev) |
| { |
| return (p_dev->manf_id == CF8305_MANFID && |
| p_dev->card_id == CF8305_CARDID); |
| } |
| |
| static inline int if_cs_hw_is_cf8381(struct pcmcia_device *p_dev) |
| { |
| return (p_dev->manf_id == CF8381_MANFID && |
| p_dev->card_id == CF8381_CARDID); |
| } |
| |
| static inline int if_cs_hw_is_cf8385(struct pcmcia_device *p_dev) |
| { |
| return (p_dev->manf_id == CF8385_MANFID && |
| p_dev->card_id == CF8385_CARDID); |
| } |
| |
| /********************************************************************/ |
| /* 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) { |
| lbs_pr_err("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) { |
| lbs_pr_err("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)) { |
| lbs_pr_err("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) { |
| lbs_pr_err("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) |
| { |
| int ret = 0; |
| int sent = 0; |
| u8 scratch; |
| const struct firmware *fw; |
| |
| 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; |
| } |
| |
| /* TODO: make firmware file configurable */ |
| ret = request_firmware(&fw, "libertas_cs_helper.fw", |
| &card->p_dev->dev); |
| if (ret) { |
| lbs_pr_err("can't load helper firmware\n"); |
| 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) { |
| lbs_pr_err("can't download helper at 0x%x, ret %d\n", |
| sent, ret); |
| goto err_release; |
| } |
| |
| if (count == 0) |
| break; |
| |
| sent += count; |
| } |
| |
| err_release: |
| release_firmware(fw); |
| 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); |
| |
| /* TODO: make firmware file configurable */ |
| ret = request_firmware(&fw, "libertas_cs.fw", |
| &card->p_dev->dev); |
| if (ret) { |
| lbs_pr_err("can't load firmware\n"); |
| ret = -ENODEV; |
| goto done; |
| } |
| 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) { |
| lbs_pr_err("helper firmware doesn't answer\n"); |
| goto err_release; |
| } |
| |
| for (sent = 0; sent < fw->size; sent += len) { |
| len = if_cs_read16(card, IF_CS_SQ_READ_LOW); |
| if (len & 1) { |
| retry++; |
| lbs_pr_info("odd, need to retry this firmware block\n"); |
| } else { |
| retry = 0; |
| } |
| |
| if (retry > 20) { |
| lbs_pr_err("could not download firmware\n"); |
| ret = -ENODEV; |
| goto err_release; |
| } |
| 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) { |
| lbs_pr_err("can't download firmware at 0x%x\n", sent); |
| goto err_release; |
| } |
| } |
| |
| ret = if_cs_poll_while_fw_download(card, IF_CS_SCRATCH, 0x5a); |
| if (ret < 0) |
| lbs_pr_err("firmware download failed\n"); |
| |
| err_release: |
| release_firmware(fw); |
| |
| done: |
| lbs_deb_leave_args(LBS_DEB_CS, "ret %d", ret); |
| return ret; |
| } |
| |
| |
| |
| /********************************************************************/ |
| /* 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: |
| lbs_pr_err("%s: unsupported type %d\n", __func__, type); |
| } |
| |
| lbs_deb_leave_args(LBS_DEB_CS, "ret %d", ret); |
| return ret; |
| } |
| |
| |
| /********************************************************************/ |
| /* Card Services */ |
| /********************************************************************/ |
| |
| /* |
| * After a card is removed, if_cs_release() will unregister the |
| * device, and release the PCMCIA configuration. If the device is |
| * still open, this will be postponed until it is closed. |
| */ |
| 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.AssignedIRQ, card); |
| pcmcia_disable_device(p_dev); |
| if (card->iobase) |
| ioport_unmap(card->iobase); |
| |
| lbs_deb_leave(LBS_DEB_CS); |
| } |
| |
| |
| /* |
| * This creates an "instance" of the driver, allocating local data |
| * structures for one device. The device is registered with Card |
| * Services. |
| * |
| * The dev_link structure is initialized, but we don't actually |
| * configure the card at this point -- we wait until we receive a card |
| * insertion event. |
| */ |
| |
| static int if_cs_ioprobe(struct pcmcia_device *p_dev, |
| cistpl_cftable_entry_t *cfg, |
| cistpl_cftable_entry_t *dflt, |
| unsigned int vcc, |
| void *priv_data) |
| { |
| p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO; |
| p_dev->io.BasePort1 = cfg->io.win[0].base; |
| p_dev->io.NumPorts1 = cfg->io.win[0].len; |
| |
| /* Do we need to allocate an interrupt? */ |
| if (cfg->irq.IRQInfo1) |
| p_dev->conf.Attributes |= CONF_ENABLE_IRQ; |
| |
| /* IO window settings */ |
| if (cfg->io.nwin != 1) { |
| lbs_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, &p_dev->io); |
| } |
| |
| 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) { |
| lbs_pr_err("error in kzalloc\n"); |
| goto out; |
| } |
| card->p_dev = p_dev; |
| p_dev->priv = card; |
| |
| p_dev->irq.Attributes = IRQ_TYPE_DYNAMIC_SHARING; |
| p_dev->irq.Handler = NULL; |
| p_dev->irq.IRQInfo1 = IRQ_INFO2_VALID | IRQ_LEVEL_ID; |
| |
| p_dev->conf.Attributes = 0; |
| p_dev->conf.IntType = INT_MEMORY_AND_IO; |
| |
| if (pcmcia_loop_config(p_dev, if_cs_ioprobe, NULL)) { |
| lbs_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->conf.Attributes & CONF_ENABLE_IRQ) { |
| ret = pcmcia_request_irq(p_dev, &p_dev->irq); |
| if (ret) { |
| lbs_pr_err("error in pcmcia_request_irq\n"); |
| goto out1; |
| } |
| } |
| |
| /* Initialize io access */ |
| card->iobase = ioport_map(p_dev->io.BasePort1, p_dev->io.NumPorts1); |
| if (!card->iobase) { |
| lbs_pr_err("error in ioport_map\n"); |
| ret = -EIO; |
| goto out1; |
| } |
| |
| /* |
| * This actually configures the PCMCIA socket -- setting up |
| * the I/O windows and the interrupt mapping, and putting the |
| * card and host interface into "Memory and IO" mode. |
| */ |
| ret = pcmcia_request_configuration(p_dev, &p_dev->conf); |
| if (ret) { |
| lbs_pr_err("error in pcmcia_request_configuration\n"); |
| goto out2; |
| } |
| |
| /* Finally, report what we've done */ |
| lbs_deb_cs("irq %d, io 0x%04x-0x%04x\n", |
| p_dev->irq.AssignedIRQ, p_dev->io.BasePort1, |
| p_dev->io.BasePort1 + p_dev->io.NumPorts1 - 1); |
| |
| /* |
| * Most of the libertas cards can do unaligned register access, but some |
| * weird ones can not. That's especially true for the CF8305 card. |
| */ |
| card->align_regs = 0; |
| |
| /* Check if we have a current silicon */ |
| prod_id = if_cs_read8(card, IF_CS_PRODUCT_ID); |
| if (if_cs_hw_is_cf8305(p_dev)) { |
| card->align_regs = 1; |
| if (prod_id < IF_CS_CF8305_B1_REV) { |
| lbs_pr_err("old chips like 8305 rev B3 " |
| "aren't supported\n"); |
| ret = -ENODEV; |
| goto out2; |
| } |
| } |
| |
| if (if_cs_hw_is_cf8381(p_dev) && prod_id < IF_CS_CF8381_B3_REV) { |
| lbs_pr_err("old chips like 8381 rev B3 aren't supported\n"); |
| ret = -ENODEV; |
| goto out2; |
| } |
| |
| if (if_cs_hw_is_cf8385(p_dev) && prod_id < IF_CS_CF8385_B1_REV) { |
| lbs_pr_err("old chips like 8385 rev B1 aren't supported\n"); |
| ret = -ENODEV; |
| goto out2; |
| } |
| |
| /* Load the firmware early, before calling into libertas.ko */ |
| ret = if_cs_prog_helper(card); |
| if (ret == 0 && !if_cs_hw_is_cf8305(p_dev)) |
| ret = if_cs_prog_real(card); |
| if (ret) |
| goto out2; |
| |
| /* Make this card known to the libertas driver */ |
| priv = lbs_add_card(card, &p_dev->dev); |
| if (!priv) { |
| ret = -ENOMEM; |
| goto out2; |
| } |
| |
| /* Finish setting up fields in lbs_private */ |
| card->priv = priv; |
| priv->card = card; |
| priv->hw_host_to_card = if_cs_host_to_card; |
| priv->fw_ready = 1; |
| |
| /* Now actually get the IRQ */ |
| ret = request_irq(p_dev->irq.AssignedIRQ, if_cs_interrupt, |
| IRQF_SHARED, DRV_NAME, card); |
| if (ret) { |
| lbs_pr_err("error in request_irq\n"); |
| goto out3; |
| } |
| |
| /* Clear any interrupt cause that happend 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 */ |
| if (lbs_start_card(priv) != 0) { |
| lbs_pr_err("could not activate card\n"); |
| goto out3; |
| } |
| |
| ret = 0; |
| 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; |
| } |
| |
| |
| /* |
| * This deletes a driver "instance". The device is de-registered with |
| * Card Services. If it has been released, all local data structures |
| * are freed. Otherwise, the structures will be freed when the device |
| * is released. |
| */ |
| 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 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), |
| PCMCIA_DEVICE_NULL, |
| }; |
| MODULE_DEVICE_TABLE(pcmcia, if_cs_ids); |
| |
| |
| static struct pcmcia_driver lbs_driver = { |
| .owner = THIS_MODULE, |
| .drv = { |
| .name = DRV_NAME, |
| }, |
| .probe = if_cs_probe, |
| .remove = if_cs_detach, |
| .id_table = if_cs_ids, |
| }; |
| |
| |
| static int __init if_cs_init(void) |
| { |
| int ret; |
| |
| lbs_deb_enter(LBS_DEB_CS); |
| ret = pcmcia_register_driver(&lbs_driver); |
| lbs_deb_leave(LBS_DEB_CS); |
| return ret; |
| } |
| |
| |
| static void __exit if_cs_exit(void) |
| { |
| lbs_deb_enter(LBS_DEB_CS); |
| pcmcia_unregister_driver(&lbs_driver); |
| lbs_deb_leave(LBS_DEB_CS); |
| } |
| |
| |
| module_init(if_cs_init); |
| module_exit(if_cs_exit); |