/* * Copyright © 2009 - Maxim Levitsky * driver for Ricoh xD readers * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #include #include #include #include #include #include #include #include #include #include #include #include "sm_common.h" #include "r852.h" static bool r852_enable_dma = 1; module_param(r852_enable_dma, bool, S_IRUGO); MODULE_PARM_DESC(r852_enable_dma, "Enable usage of the DMA (default)"); static int debug; module_param(debug, int, S_IRUGO | S_IWUSR); MODULE_PARM_DESC(debug, "Debug level (0-2)"); /* read register */ static inline uint8_t r852_read_reg(struct r852_device *dev, int address) { uint8_t reg = readb(dev->mmio + address); return reg; } /* write register */ static inline void r852_write_reg(struct r852_device *dev, int address, uint8_t value) { writeb(value, dev->mmio + address); mmiowb(); } /* read dword sized register */ static inline uint32_t r852_read_reg_dword(struct r852_device *dev, int address) { uint32_t reg = le32_to_cpu(readl(dev->mmio + address)); return reg; } /* write dword sized register */ static inline void r852_write_reg_dword(struct r852_device *dev, int address, uint32_t value) { writel(cpu_to_le32(value), dev->mmio + address); mmiowb(); } /* returns pointer to our private structure */ static inline struct r852_device *r852_get_dev(struct mtd_info *mtd) { struct nand_chip *chip = mtd->priv; return chip->priv; } /* check if controller supports dma */ static void r852_dma_test(struct r852_device *dev) { dev->dma_usable = (r852_read_reg(dev, R852_DMA_CAP) & (R852_DMA1 | R852_DMA2)) == (R852_DMA1 | R852_DMA2); if (!dev->dma_usable) message("Non dma capable device detected, dma disabled"); if (!r852_enable_dma) { message("disabling dma on user request"); dev->dma_usable = 0; } } /* * Enable dma. Enables ether first or second stage of the DMA, * Expects dev->dma_dir and dev->dma_state be set */ static void r852_dma_enable(struct r852_device *dev) { uint8_t dma_reg, dma_irq_reg; /* Set up dma settings */ dma_reg = r852_read_reg_dword(dev, R852_DMA_SETTINGS); dma_reg &= ~(R852_DMA_READ | R852_DMA_INTERNAL | R852_DMA_MEMORY); if (dev->dma_dir) dma_reg |= R852_DMA_READ; if (dev->dma_state == DMA_INTERNAL) { dma_reg |= R852_DMA_INTERNAL; /* Precaution to make sure HW doesn't write */ /* to random kernel memory */ r852_write_reg_dword(dev, R852_DMA_ADDR, cpu_to_le32(dev->phys_bounce_buffer)); } else { dma_reg |= R852_DMA_MEMORY; r852_write_reg_dword(dev, R852_DMA_ADDR, cpu_to_le32(dev->phys_dma_addr)); } /* Precaution: make sure write reached the device */ r852_read_reg_dword(dev, R852_DMA_ADDR); r852_write_reg_dword(dev, R852_DMA_SETTINGS, dma_reg); /* Set dma irq */ dma_irq_reg = r852_read_reg_dword(dev, R852_DMA_IRQ_ENABLE); r852_write_reg_dword(dev, R852_DMA_IRQ_ENABLE, dma_irq_reg | R852_DMA_IRQ_INTERNAL | R852_DMA_IRQ_ERROR | R852_DMA_IRQ_MEMORY); } /* * Disable dma, called from the interrupt handler, which specifies * success of the operation via 'error' argument */ static void r852_dma_done(struct r852_device *dev, int error) { WARN_ON(dev->dma_stage == 0); r852_write_reg_dword(dev, R852_DMA_IRQ_STA, r852_read_reg_dword(dev, R852_DMA_IRQ_STA)); r852_write_reg_dword(dev, R852_DMA_SETTINGS, 0); r852_write_reg_dword(dev, R852_DMA_IRQ_ENABLE, 0); /* Precaution to make sure HW doesn't write to random kernel memory */ r852_write_reg_dword(dev, R852_DMA_ADDR, cpu_to_le32(dev->phys_bounce_buffer)); r852_read_reg_dword(dev, R852_DMA_ADDR); dev->dma_error = error; dev->dma_stage = 0; if (dev->phys_dma_addr && dev->phys_dma_addr != dev->phys_bounce_buffer) pci_unmap_single(dev->pci_dev, dev->phys_dma_addr, R852_DMA_LEN, dev->dma_dir ? PCI_DMA_FROMDEVICE : PCI_DMA_TODEVICE); } /* * Wait, till dma is done, which includes both phases of it */ static int r852_dma_wait(struct r852_device *dev) { long timeout = wait_for_completion_timeout(&dev->dma_done, msecs_to_jiffies(1000)); if (!timeout) { dbg("timeout waiting for DMA interrupt"); return -ETIMEDOUT; } return 0; } /* * Read/Write one page using dma. Only pages can be read (512 bytes) */ static void r852_do_dma(struct r852_device *dev, uint8_t *buf, int do_read) { int bounce = 0; unsigned long flags; int error; dev->dma_error = 0; /* Set dma direction */ dev->dma_dir = do_read; dev->dma_stage = 1; INIT_COMPLETION(dev->dma_done); dbg_verbose("doing dma %s ", do_read ? "read" : "write"); /* Set initial dma state: for reading first fill on board buffer, from device, for writes first fill the buffer from memory*/ dev->dma_state = do_read ? DMA_INTERNAL : DMA_MEMORY; /* if incoming buffer is not page aligned, we should do bounce */ if ((unsigned long)buf & (R852_DMA_LEN-1)) bounce = 1; if (!bounce) { dev->phys_dma_addr = pci_map_single(dev->pci_dev, (void *)buf, R852_DMA_LEN, (do_read ? PCI_DMA_FROMDEVICE : PCI_DMA_TODEVICE)); if (pci_dma_mapping_error(dev->pci_dev, dev->phys_dma_addr)) bounce = 1; } if (bounce) { dbg_verbose("dma: using bounce buffer"); dev->phys_dma_addr = dev->phys_bounce_buffer; if (!do_read) memcpy(dev->bounce_buffer, buf, R852_DMA_LEN); } /* Enable DMA */ spin_lock_irqsave(&dev->irqlock, flags); r852_dma_enable(dev); spin_unlock_irqrestore(&dev->irqlock, flags); /* Wait till complete */ error = r852_dma_wait(dev); if (error) { r852_dma_done(dev, error); return; } if (do_read && bounce) memcpy((void *)buf, dev->bounce_buffer, R852_DMA_LEN); } /* * Program data lines of the nand chip to send data to it */ void r852_write_buf(struct mtd_info *mtd, const uint8_t *buf, int len) { struct r852_device *dev = r852_get_dev(mtd); uint32_t reg; /* Don't allow any access to hardware if we suspect card removal */ if (dev->card_unstable) return; /* Special case for whole sector read */ if (len == R852_DMA_LEN && dev->dma_usable) { r852_do_dma(dev, (uint8_t *)buf, 0); return; } /* write DWORD chinks - faster */ while (len) { reg = buf[0] | buf[1] << 8 | buf[2] << 16 | buf[3] << 24; r852_write_reg_dword(dev, R852_DATALINE, reg); buf += 4; len -= 4; } /* write rest */ while (len) r852_write_reg(dev, R852_DATALINE, *buf++); } /* * Read data lines of the nand chip to retrieve data */ void r852_read_buf(struct mtd_info *mtd, uint8_t *buf, int len) { struct r852_device *dev = r852_get_dev(mtd); uint32_t reg; if (dev->card_unstable) { /* since we can't signal error here, at least, return predictable buffer */ memset(buf, 0, len); return; } /* special case for whole sector read */ if (len == R852_DMA_LEN && dev->dma_usable) { r852_do_dma(dev, buf, 1); return; } /* read in dword sized chunks */ while (len >= 4) { reg = r852_read_reg_dword(dev, R852_DATALINE); *buf++ = reg & 0xFF; *buf++ = (reg >> 8) & 0xFF; *buf++ = (reg >> 16) & 0xFF; *buf++ = (reg >> 24) & 0xFF; len -= 4; } /* read the reset by bytes */ while (len--) *buf++ = r852_read_reg(dev, R852_DATALINE); } /* * Read one byte from nand chip */ static uint8_t r852_read_byte(struct mtd_info *mtd) { struct r852_device *dev = r852_get_dev(mtd); /* Same problem as in r852_read_buf.... */ if (dev->card_unstable) return 0; return r852_read_reg(dev, R852_DATALINE); } /* * Readback the buffer to verify it */ int r852_verify_buf(struct mtd_info *mtd, const uint8_t *buf, int len) { struct r852_device *dev = r852_get_dev(mtd); /* We can't be sure about anything here... */ if (dev->card_unstable) return -1; /* This will never happen, unless you wired up a nand chip with > 512 bytes page size to the reader */ if (len > SM_SECTOR_SIZE) return 0; r852_read_buf(mtd, dev->tmp_buffer, len); return memcmp(buf, dev->tmp_buffer, len); } /* * Control several chip lines & send commands */ void r852_cmdctl(struct mtd_info *mtd, int dat, unsigned int ctrl) { struct r852_device *dev = r852_get_dev(mtd); if (dev->card_unstable) return; if (ctrl & NAND_CTRL_CHANGE) { dev->ctlreg &= ~(R852_CTL_DATA | R852_CTL_COMMAND | R852_CTL_ON | R852_CTL_CARDENABLE); if (ctrl & NAND_ALE) dev->ctlreg |= R852_CTL_DATA; if (ctrl & NAND_CLE) dev->ctlreg |= R852_CTL_COMMAND; if (ctrl & NAND_NCE) dev->ctlreg |= (R852_CTL_CARDENABLE | R852_CTL_ON); else dev->ctlreg &= ~R852_CTL_WRITE; /* when write is stareted, enable write access */ if (dat == NAND_CMD_ERASE1) dev->ctlreg |= R852_CTL_WRITE; r852_write_reg(dev, R852_CTL, dev->ctlreg); } /* HACK: NAND_CMD_SEQIN is called without NAND_CTRL_CHANGE, but we need to set write mode */ if (dat == NAND_CMD_SEQIN && (dev->ctlreg & R852_CTL_COMMAND)) { dev->ctlreg |= R852_CTL_WRITE; r852_write_reg(dev, R852_CTL, dev->ctlreg); } if (dat != NAND_CMD_NONE) r852_write_reg(dev, R852_DATALINE, dat); } /* * Wait till card is ready. * based on nand_wait, but returns errors on DMA error */ int r852_wait(struct mtd_info *mtd, struct nand_chip *chip) { struct r852_device *dev = chip->priv; unsigned long timeout; int status; timeout = jiffies + (chip->state == FL_ERASING ? msecs_to_jiffies(400) : msecs_to_jiffies(20)); while (time_before(jiffies, timeout)) if (chip->dev_ready(mtd)) break; chip->cmdfunc(mtd, NAND_CMD_STATUS, -1, -1); status = (int)chip->read_byte(mtd); /* Unfortunelly, no way to send detailed error status... */ if (dev->dma_error) { status |= NAND_STATUS_FAIL; dev->dma_error = 0; } return status; } /* * Check if card is ready */ int r852_ready(struct mtd_info *mtd) { struct r852_device *dev = r852_get_dev(mtd); return !(r852_read_reg(dev, R852_CARD_STA) & R852_CARD_STA_BUSY); } /* * Set ECC engine mode */ void r852_ecc_hwctl(struct mtd_info *mtd, int mode) { struct r852_device *dev = r852_get_dev(mtd); if (dev->card_unstable) return; switch (mode) { case NAND_ECC_READ: case NAND_ECC_WRITE: /* enable ecc generation/check*/ dev->ctlreg |= R852_CTL_ECC_ENABLE; /* flush ecc buffer */ r852_write_reg(dev, R852_CTL, dev->ctlreg | R852_CTL_ECC_ACCESS); r852_read_reg_dword(dev, R852_DATALINE); r852_write_reg(dev, R852_CTL, dev->ctlreg); return; case NAND_ECC_READSYN: /* disable ecc generation */ dev->ctlreg &= ~R852_CTL_ECC_ENABLE; r852_write_reg(dev, R852_CTL, dev->ctlreg); } } /* * Calculate ECC, only used for writes */ int r852_ecc_calculate(struct mtd_info *mtd, const uint8_t *dat, uint8_t *ecc_code) { struct r852_device *dev = r852_get_dev(mtd); struct sm_oob *oob = (struct sm_oob *)ecc_code; uint32_t ecc1, ecc2; if (dev->card_unstable) return 0; dev->ctlreg &= ~R852_CTL_ECC_ENABLE; r852_write_reg(dev, R852_CTL, dev->ctlreg | R852_CTL_ECC_ACCESS); ecc1 = r852_read_reg_dword(dev, R852_DATALINE); ecc2 = r852_read_reg_dword(dev, R852_DATALINE); oob->ecc1[0] = (ecc1) & 0xFF; oob->ecc1[1] = (ecc1 >> 8) & 0xFF; oob->ecc1[2] = (ecc1 >> 16) & 0xFF; oob->ecc2[0] = (ecc2) & 0xFF; oob->ecc2[1] = (ecc2 >> 8) & 0xFF; oob->ecc2[2] = (ecc2 >> 16) & 0xFF; r852_write_reg(dev, R852_CTL, dev->ctlreg); return 0; } /* * Correct the data using ECC, hw did almost everything for us */ int r852_ecc_correct(struct mtd_info *mtd, uint8_t *dat, uint8_t *read_ecc, uint8_t *calc_ecc) { uint16_t ecc_reg; uint8_t ecc_status, err_byte; int i, error = 0; struct r852_device *dev = r852_get_dev(mtd); if (dev->card_unstable) return 0; if (dev->dma_error) { dev->dma_error = 0; return -1; } r852_write_reg(dev, R852_CTL, dev->ctlreg | R852_CTL_ECC_ACCESS); ecc_reg = r852_read_reg_dword(dev, R852_DATALINE); r852_write_reg(dev, R852_CTL, dev->ctlreg); for (i = 0 ; i <= 1 ; i++) { ecc_status = (ecc_reg >> 8) & 0xFF; /* ecc uncorrectable error */ if (ecc_status & R852_ECC_FAIL) { dbg("ecc: unrecoverable error, in half %d", i); error = -1; goto exit; } /* correctable error */ if (ecc_status & R852_ECC_CORRECTABLE) { err_byte = ecc_reg & 0xFF; dbg("ecc: recoverable error, " "in half %d, byte %d, bit %d", i, err_byte, ecc_status & R852_ECC_ERR_BIT_MSK); dat[err_byte] ^= 1 << (ecc_status & R852_ECC_ERR_BIT_MSK); error++; } dat += 256; ecc_reg >>= 16; } exit: return error; } /* * This is copy of nand_read_oob_std * nand_read_oob_syndrome assumes we can send column address - we can't */ static int r852_read_oob(struct mtd_info *mtd, struct nand_chip *chip, int page, int sndcmd) { if (sndcmd) { chip->cmdfunc(mtd, NAND_CMD_READOOB, 0, page); sndcmd = 0; } chip->read_buf(mtd, chip->oob_poi, mtd->oobsize); return sndcmd; } /* * Start the nand engine */ void r852_engine_enable(struct r852_device *dev) { if (r852_read_reg_dword(dev, R852_HW) & R852_HW_UNKNOWN) { r852_write_reg(dev, R852_CTL, R852_CTL_RESET | R852_CTL_ON); r852_write_reg_dword(dev, R852_HW, R852_HW_ENABLED); } else { r852_write_reg_dword(dev, R852_HW, R852_HW_ENABLED); r852_write_reg(dev, R852_CTL, R852_CTL_RESET | R852_CTL_ON); } msleep(300); r852_write_reg(dev, R852_CTL, 0); } /* * Stop the nand engine */ void r852_engine_disable(struct r852_device *dev) { r852_write_reg_dword(dev, R852_HW, 0); r852_write_reg(dev, R852_CTL, R852_CTL_RESET); } /* * Test if card is present */ void r852_card_update_present(struct r852_device *dev) { unsigned long flags; uint8_t reg; spin_lock_irqsave(&dev->irqlock, flags); reg = r852_read_reg(dev, R852_CARD_STA); dev->card_detected = !!(reg & R852_CARD_STA_PRESENT); spin_unlock_irqrestore(&dev->irqlock, flags); } /* * Update card detection IRQ state according to current card state * which is read in r852_card_update_present */ void r852_update_card_detect(struct r852_device *dev) { int card_detect_reg = r852_read_reg(dev, R852_CARD_IRQ_ENABLE); dev->card_unstable = 0; card_detect_reg &= ~(R852_CARD_IRQ_REMOVE | R852_CARD_IRQ_INSERT); card_detect_reg |= R852_CARD_IRQ_GENABLE; card_detect_reg |= dev->card_detected ? R852_CARD_IRQ_REMOVE : R852_CARD_IRQ_INSERT; r852_write_reg(dev, R852_CARD_IRQ_ENABLE, card_detect_reg); } ssize_t r852_media_type_show(struct device *sys_dev, struct device_attribute *attr, char *buf) { struct mtd_info *mtd = container_of(sys_dev, struct mtd_info, dev); struct r852_device *dev = r852_get_dev(mtd); char *data = dev->sm ? "smartmedia" : "xd"; strcpy(buf, data); return strlen(data); } DEVICE_ATTR(media_type, S_IRUGO, r852_media_type_show, NULL); /* Detect properties of card in slot */ void r852_update_media_status(struct r852_device *dev) { uint8_t reg; unsigned long flags; int readonly; spin_lock_irqsave(&dev->irqlock, flags); if (!dev->card_detected) { message("card removed"); spin_unlock_irqrestore(&dev->irqlock, flags); return ; } readonly = r852_read_reg(dev, R852_CARD_STA) & R852_CARD_STA_RO; reg = r852_read_reg(dev, R852_DMA_CAP); dev->sm = (reg & (R852_DMA1 | R852_DMA2)) && (reg & R852_SMBIT); message("detected %s %s card in slot", dev->sm ? "SmartMedia" : "xD", readonly ? "readonly" : "writeable"); dev->readonly = readonly; spin_unlock_irqrestore(&dev->irqlock, flags); } /* * Register the nand device * Called when the card is detected */ int r852_register_nand_device(struct r852_device *dev) { dev->mtd = kzalloc(sizeof(struct mtd_info), GFP_KERNEL); if (!dev->mtd) goto error1; WARN_ON(dev->card_registred); dev->mtd->owner = THIS_MODULE; dev->mtd->priv = dev->chip; dev->mtd->dev.parent = &dev->pci_dev->dev; if (dev->readonly) dev->chip->options |= NAND_ROM; r852_engine_enable(dev); if (sm_register_device(dev->mtd, dev->sm)) goto error2; if (device_create_file(&dev->mtd->dev, &dev_attr_media_type)) message("can't create media type sysfs attribute"); dev->card_registred = 1; return 0; error2: kfree(dev->mtd); error1: /* Force card redetect */ dev->card_detected = 0; return -1; } /* * Unregister the card */ void r852_unregister_nand_device(struct r852_device *dev) { if (!dev->card_registred) return; device_remove_file(&dev->mtd->dev, &dev_attr_media_type); nand_release(dev->mtd); r852_engine_disable(dev); dev->card_registred = 0; kfree(dev->mtd); dev->mtd = NULL; } /* Card state updater */ void r852_card_detect_work(struct work_struct *work) { struct r852_device *dev = container_of(work, struct r852_device, card_detect_work.work); r852_card_update_present(dev); r852_update_card_detect(dev); dev->card_unstable = 0; /* False alarm */ if (dev->card_detected == dev->card_registred) goto exit; /* Read media properties */ r852_update_media_status(dev); /* Register the card */ if (dev->card_detected) r852_register_nand_device(dev); else r852_unregister_nand_device(dev); exit: r852_update_card_detect(dev); } /* Ack + disable IRQ generation */ static void r852_disable_irqs(struct r852_device *dev) { uint8_t reg; reg = r852_read_reg(dev, R852_CARD_IRQ_ENABLE); r852_write_reg(dev, R852_CARD_IRQ_ENABLE, reg & ~R852_CARD_IRQ_MASK); reg = r852_read_reg_dword(dev, R852_DMA_IRQ_ENABLE); r852_write_reg_dword(dev, R852_DMA_IRQ_ENABLE, reg & ~R852_DMA_IRQ_MASK); r852_write_reg(dev, R852_CARD_IRQ_STA, R852_CARD_IRQ_MASK); r852_write_reg_dword(dev, R852_DMA_IRQ_STA, R852_DMA_IRQ_MASK); } /* Interrupt handler */ static irqreturn_t r852_irq(int irq, void *data) { struct r852_device *dev = (struct r852_device *)data; uint8_t card_status, dma_status; unsigned long flags; irqreturn_t ret = IRQ_NONE; spin_lock_irqsave(&dev->irqlock, flags); /* handle card detection interrupts first */ card_status = r852_read_reg(dev, R852_CARD_IRQ_STA); r852_write_reg(dev, R852_CARD_IRQ_STA, card_status); if (card_status & (R852_CARD_IRQ_INSERT|R852_CARD_IRQ_REMOVE)) { ret = IRQ_HANDLED; dev->card_detected = !!(card_status & R852_CARD_IRQ_INSERT); /* we shouldn't receive any interrupts if we wait for card to settle */ WARN_ON(dev->card_unstable); /* disable irqs while card is unstable */ /* this will timeout DMA if active, but better that garbage */ r852_disable_irqs(dev); if (dev->card_unstable) goto out; /* let, card state to settle a bit, and then do the work */ dev->card_unstable = 1; queue_delayed_work(dev->card_workqueue, &dev->card_detect_work, msecs_to_jiffies(100)); goto out; } /* Handle dma interrupts */ dma_status = r852_read_reg_dword(dev, R852_DMA_IRQ_STA); r852_write_reg_dword(dev, R852_DMA_IRQ_STA, dma_status); if (dma_status & R852_DMA_IRQ_MASK) { ret = IRQ_HANDLED; if (dma_status & R852_DMA_IRQ_ERROR) { dbg("received dma error IRQ"); r852_dma_done(dev, -EIO); complete(&dev->dma_done); goto out; } /* received DMA interrupt out of nowhere? */ WARN_ON_ONCE(dev->dma_stage == 0); if (dev->dma_stage == 0) goto out; /* done device access */ if (dev->dma_state == DMA_INTERNAL && (dma_status & R852_DMA_IRQ_INTERNAL)) { dev->dma_state = DMA_MEMORY; dev->dma_stage++; } /* done memory DMA */ if (dev->dma_state == DMA_MEMORY && (dma_status & R852_DMA_IRQ_MEMORY)) { dev->dma_state = DMA_INTERNAL; dev->dma_stage++; } /* Enable 2nd half of dma dance */ if (dev->dma_stage == 2) r852_dma_enable(dev); /* Operation done */ if (dev->dma_stage == 3) { r852_dma_done(dev, 0); complete(&dev->dma_done); } goto out; } /* Handle unknown interrupts */ if (dma_status) dbg("bad dma IRQ status = %x", dma_status); if (card_status & ~R852_CARD_STA_CD) dbg("strange card status = %x", card_status); out: spin_unlock_irqrestore(&dev->irqlock, flags); return ret; } int r852_probe(struct pci_dev *pci_dev, const struct pci_device_id *id) { int error; struct nand_chip *chip; struct r852_device *dev; /* pci initialization */ error = pci_enable_device(pci_dev); if (error) goto error1; pci_set_master(pci_dev); error = pci_set_dma_mask(pci_dev, DMA_BIT_MASK(32)); if (error) goto error2; error = pci_request_regions(pci_dev, DRV_NAME); if (error) goto error3; error = -ENOMEM; /* init nand chip, but register it only on card insert */ chip = kzalloc(sizeof(struct nand_chip), GFP_KERNEL); if (!chip) goto error4; /* commands */ chip->cmd_ctrl = r852_cmdctl; chip->waitfunc = r852_wait; chip->dev_ready = r852_ready; /* I/O */ chip->read_byte = r852_read_byte; chip->read_buf = r852_read_buf; chip->write_buf = r852_write_buf; chip->verify_buf = r852_verify_buf; /* ecc */ chip->ecc.mode = NAND_ECC_HW_SYNDROME; chip->ecc.size = R852_DMA_LEN; chip->ecc.bytes = SM_OOB_SIZE; chip->ecc.strength = 2; chip->ecc.hwctl = r852_ecc_hwctl; chip->ecc.calculate = r852_ecc_calculate; chip->ecc.correct = r852_ecc_correct; /* TODO: hack */ chip->ecc.read_oob = r852_read_oob; /* init our device structure */ dev = kzalloc(sizeof(struct r852_device), GFP_KERNEL); if (!dev) goto error5; chip->priv = dev; dev->chip = chip; dev->pci_dev = pci_dev; pci_set_drvdata(pci_dev, dev); dev->bounce_buffer = pci_alloc_consistent(pci_dev, R852_DMA_LEN, &dev->phys_bounce_buffer); if (!dev->bounce_buffer) goto error6; error = -ENODEV; dev->mmio = pci_ioremap_bar(pci_dev, 0); if (!dev->mmio) goto error7; error = -ENOMEM; dev->tmp_buffer = kzalloc(SM_SECTOR_SIZE, GFP_KERNEL); if (!dev->tmp_buffer) goto error8; init_completion(&dev->dma_done); dev->card_workqueue = create_freezable_workqueue(DRV_NAME); if (!dev->card_workqueue) goto error9; INIT_DELAYED_WORK(&dev->card_detect_work, r852_card_detect_work); /* shutdown everything - precation */ r852_engine_disable(dev); r852_disable_irqs(dev); r852_dma_test(dev); dev->irq = pci_dev->irq; spin_lock_init(&dev->irqlock); dev->card_detected = 0; r852_card_update_present(dev); /*register irq handler*/ error = -ENODEV; if (request_irq(pci_dev->irq, &r852_irq, IRQF_SHARED, DRV_NAME, dev)) goto error10; /* kick initial present test */ queue_delayed_work(dev->card_workqueue, &dev->card_detect_work, 0); printk(KERN_NOTICE DRV_NAME ": driver loaded successfully\n"); return 0; error10: destroy_workqueue(dev->card_workqueue); error9: kfree(dev->tmp_buffer); error8: pci_iounmap(pci_dev, dev->mmio); error7: pci_free_consistent(pci_dev, R852_DMA_LEN, dev->bounce_buffer, dev->phys_bounce_buffer); error6: kfree(dev); error5: kfree(chip); error4: pci_release_regions(pci_dev); error3: error2: pci_disable_device(pci_dev); error1: return error; } void r852_remove(struct pci_dev *pci_dev) { struct r852_device *dev = pci_get_drvdata(pci_dev); /* Stop detect workqueue - we are going to unregister the device anyway*/ cancel_delayed_work_sync(&dev->card_detect_work); destroy_workqueue(dev->card_workqueue); /* Unregister the device, this might make more IO */ r852_unregister_nand_device(dev); /* Stop interrupts */ r852_disable_irqs(dev); synchronize_irq(dev->irq); free_irq(dev->irq, dev); /* Cleanup */ kfree(dev->tmp_buffer); pci_iounmap(pci_dev, dev->mmio); pci_free_consistent(pci_dev, R852_DMA_LEN, dev->bounce_buffer, dev->phys_bounce_buffer); kfree(dev->chip); kfree(dev); /* Shutdown the PCI device */ pci_release_regions(pci_dev); pci_disable_device(pci_dev); } void r852_shutdown(struct pci_dev *pci_dev) { struct r852_device *dev = pci_get_drvdata(pci_dev); cancel_delayed_work_sync(&dev->card_detect_work); r852_disable_irqs(dev); synchronize_irq(dev->irq); pci_disable_device(pci_dev); } #ifdef CONFIG_PM static int r852_suspend(struct device *device) { struct r852_device *dev = pci_get_drvdata(to_pci_dev(device)); if (dev->ctlreg & R852_CTL_CARDENABLE) return -EBUSY; /* First make sure the detect work is gone */ cancel_delayed_work_sync(&dev->card_detect_work); /* Turn off the interrupts and stop the device */ r852_disable_irqs(dev); r852_engine_disable(dev); /* If card was pulled off just during the suspend, which is very unlikely, we will remove it on resume, it too late now anyway... */ dev->card_unstable = 0; return 0; } static int r852_resume(struct device *device) { struct r852_device *dev = pci_get_drvdata(to_pci_dev(device)); r852_disable_irqs(dev); r852_card_update_present(dev); r852_engine_disable(dev); /* If card status changed, just do the work */ if (dev->card_detected != dev->card_registred) { dbg("card was %s during low power state", dev->card_detected ? "added" : "removed"); queue_delayed_work(dev->card_workqueue, &dev->card_detect_work, msecs_to_jiffies(1000)); return 0; } /* Otherwise, initialize the card */ if (dev->card_registred) { r852_engine_enable(dev); dev->chip->select_chip(dev->mtd, 0); dev->chip->cmdfunc(dev->mtd, NAND_CMD_RESET, -1, -1); dev->chip->select_chip(dev->mtd, -1); } /* Program card detection IRQ */ r852_update_card_detect(dev); return 0; } #else #define r852_suspend NULL #define r852_resume NULL #endif static const struct pci_device_id r852_pci_id_tbl[] = { { PCI_VDEVICE(RICOH, 0x0852), }, { }, }; MODULE_DEVICE_TABLE(pci, r852_pci_id_tbl); static SIMPLE_DEV_PM_OPS(r852_pm_ops, r852_suspend, r852_resume); static struct pci_driver r852_pci_driver = { .name = DRV_NAME, .id_table = r852_pci_id_tbl, .probe = r852_probe, .remove = r852_remove, .shutdown = r852_shutdown, .driver.pm = &r852_pm_ops, }; module_pci_driver(r852_pci_driver); MODULE_LICENSE("GPL"); MODULE_AUTHOR("Maxim Levitsky "); MODULE_DESCRIPTION("Ricoh 85xx xD/smartmedia card reader driver");