diff options
Diffstat (limited to 'drivers/scsi/wd719x.c')
| -rw-r--r-- | drivers/scsi/wd719x.c | 996 |
1 files changed, 996 insertions, 0 deletions
diff --git a/drivers/scsi/wd719x.c b/drivers/scsi/wd719x.c new file mode 100644 index 000000000000..7702664d7ed3 --- /dev/null +++ b/drivers/scsi/wd719x.c @@ -0,0 +1,996 @@ +/* + * Driver for Western Digital WD7193, WD7197 and WD7296 SCSI cards + * Copyright 2013 Ondrej Zary + * + * Original driver by + * Aaron Dewell <dewell@woods.net> + * Gaerti <Juergen.Gaertner@mbox.si.uni-hannover.de> + * + * HW documentation available in book: + * + * SPIDER Command Protocol + * by Chandru M. Sippy + * SCSI Storage Products (MCP) + * Western Digital Corporation + * 09-15-95 + * + * http://web.archive.org/web/20070717175254/http://sun1.rrzn.uni-hannover.de/gaertner.juergen/wd719x/Linux/Docu/Spider/ + */ + +/* + * Driver workflow: + * 1. SCSI command is transformed to SCB (Spider Control Block) by the + * queuecommand function. + * 2. The address of the SCB is stored in a list to be able to access it, if + * something goes wrong. + * 3. The address of the SCB is written to the Controller, which loads the SCB + * via BM-DMA and processes it. + * 4. After it has finished, it generates an interrupt, and sets registers. + * + * flaws: + * - abort/reset functions + * + * ToDo: + * - tagged queueing + */ + +#include <linux/interrupt.h> +#include <linux/module.h> +#include <linux/delay.h> +#include <linux/pci.h> +#include <linux/firmware.h> +#include <linux/eeprom_93cx6.h> +#include <scsi/scsi_cmnd.h> +#include <scsi/scsi_device.h> +#include <scsi/scsi_host.h> +#include "wd719x.h" + +/* low-level register access */ +static inline u8 wd719x_readb(struct wd719x *wd, u8 reg) +{ + return ioread8(wd->base + reg); +} + +static inline u32 wd719x_readl(struct wd719x *wd, u8 reg) +{ + return ioread32(wd->base + reg); +} + +static inline void wd719x_writeb(struct wd719x *wd, u8 reg, u8 val) +{ + iowrite8(val, wd->base + reg); +} + +static inline void wd719x_writew(struct wd719x *wd, u8 reg, u16 val) +{ + iowrite16(val, wd->base + reg); +} + +static inline void wd719x_writel(struct wd719x *wd, u8 reg, u32 val) +{ + iowrite32(val, wd->base + reg); +} + +/* wait until the command register is ready */ +static inline int wd719x_wait_ready(struct wd719x *wd) +{ + int i = 0; + + do { + if (wd719x_readb(wd, WD719X_AMR_COMMAND) == WD719X_CMD_READY) + return 0; + udelay(1); + } while (i++ < WD719X_WAIT_FOR_CMD_READY); + + dev_err(&wd->pdev->dev, "command register is not ready: 0x%02x\n", + wd719x_readb(wd, WD719X_AMR_COMMAND)); + + return -ETIMEDOUT; +} + +/* poll interrupt status register until command finishes */ +static inline int wd719x_wait_done(struct wd719x *wd, int timeout) +{ + u8 status; + + while (timeout > 0) { + status = wd719x_readb(wd, WD719X_AMR_INT_STATUS); + if (status) + break; + timeout--; + udelay(1); + } + + if (timeout <= 0) { + dev_err(&wd->pdev->dev, "direct command timed out\n"); + return -ETIMEDOUT; + } + + if (status != WD719X_INT_NOERRORS) { + dev_err(&wd->pdev->dev, "direct command failed, status 0x%02x, SUE 0x%02x\n", + status, wd719x_readb(wd, WD719X_AMR_SCB_ERROR)); + return -EIO; + } + + return 0; +} + +static int wd719x_direct_cmd(struct wd719x *wd, u8 opcode, u8 dev, u8 lun, + u8 tag, dma_addr_t data, int timeout) +{ + int ret = 0; + + /* clear interrupt status register (allow command register to clear) */ + wd719x_writeb(wd, WD719X_AMR_INT_STATUS, WD719X_INT_NONE); + + /* Wait for the Command register to become free */ + if (wd719x_wait_ready(wd)) + return -ETIMEDOUT; + + /* make sure we get NO interrupts */ + dev |= WD719X_DISABLE_INT; + wd719x_writeb(wd, WD719X_AMR_CMD_PARAM, dev); + wd719x_writeb(wd, WD719X_AMR_CMD_PARAM_2, lun); + wd719x_writeb(wd, WD719X_AMR_CMD_PARAM_3, tag); + if (data) + wd719x_writel(wd, WD719X_AMR_SCB_IN, data); + + /* clear interrupt status register again */ + wd719x_writeb(wd, WD719X_AMR_INT_STATUS, WD719X_INT_NONE); + + /* Now, write the command */ + wd719x_writeb(wd, WD719X_AMR_COMMAND, opcode); + + if (timeout) /* wait for the command to complete */ + ret = wd719x_wait_done(wd, timeout); + + /* clear interrupt status register (clean up) */ + if (opcode != WD719X_CMD_READ_FIRMVER) + wd719x_writeb(wd, WD719X_AMR_INT_STATUS, WD719X_INT_NONE); + + return ret; +} + +static void wd719x_destroy(struct wd719x *wd) +{ + struct wd719x_scb *scb; + + /* stop the RISC */ + if (wd719x_direct_cmd(wd, WD719X_CMD_SLEEP, 0, 0, 0, 0, + WD719X_WAIT_FOR_RISC)) + dev_warn(&wd->pdev->dev, "RISC sleep command failed\n"); + /* disable RISC */ + wd719x_writeb(wd, WD719X_PCI_MODE_SELECT, 0); + + /* free all SCBs */ + list_for_each_entry(scb, &wd->active_scbs, list) + pci_free_consistent(wd->pdev, sizeof(struct wd719x_scb), scb, + scb->phys); + list_for_each_entry(scb, &wd->free_scbs, list) + pci_free_consistent(wd->pdev, sizeof(struct wd719x_scb), scb, + scb->phys); + /* free internal buffers */ + pci_free_consistent(wd->pdev, wd->fw_size, wd->fw_virt, wd->fw_phys); + wd->fw_virt = NULL; + pci_free_consistent(wd->pdev, WD719X_HASH_TABLE_SIZE, wd->hash_virt, + wd->hash_phys); + wd->hash_virt = NULL; + pci_free_consistent(wd->pdev, sizeof(struct wd719x_host_param), + wd->params, wd->params_phys); + wd->params = NULL; + free_irq(wd->pdev->irq, wd); +} + +/* finish a SCSI command, mark SCB (if any) as free, unmap buffers */ +static void wd719x_finish_cmd(struct scsi_cmnd *cmd, int result) +{ + struct wd719x *wd = shost_priv(cmd->device->host); + struct wd719x_scb *scb = (struct wd719x_scb *) cmd->host_scribble; + + if (scb) { + list_move(&scb->list, &wd->free_scbs); + dma_unmap_single(&wd->pdev->dev, cmd->SCp.dma_handle, + SCSI_SENSE_BUFFERSIZE, DMA_FROM_DEVICE); + scsi_dma_unmap(cmd); + } + cmd->result = result << 16; + cmd->scsi_done(cmd); +} + +/* Build a SCB and send it to the card */ +static int wd719x_queuecommand(struct Scsi_Host *sh, struct scsi_cmnd *cmd) +{ + int i, count_sg; + unsigned long flags; + struct wd719x_scb *scb; + struct wd719x *wd = shost_priv(sh); + dma_addr_t phys; + + cmd->host_scribble = NULL; + + /* get a free SCB - either from existing ones or allocate a new one */ + spin_lock_irqsave(wd->sh->host_lock, flags); + scb = list_first_entry_or_null(&wd->free_scbs, struct wd719x_scb, list); + if (scb) { + list_del(&scb->list); + phys = scb->phys; + } else { + spin_unlock_irqrestore(wd->sh->host_lock, flags); + scb = pci_alloc_consistent(wd->pdev, sizeof(struct wd719x_scb), + &phys); + spin_lock_irqsave(wd->sh->host_lock, flags); + if (!scb) { + dev_err(&wd->pdev->dev, "unable to allocate SCB\n"); + wd719x_finish_cmd(cmd, DID_ERROR); + spin_unlock_irqrestore(wd->sh->host_lock, flags); + return 0; + } + } + memset(scb, 0, sizeof(struct wd719x_scb)); + list_add(&scb->list, &wd->active_scbs); + + scb->phys = phys; + scb->cmd = cmd; + cmd->host_scribble = (char *) scb; + + scb->CDB_tag = 0; /* Tagged queueing not supported yet */ + scb->devid = cmd->device->id; + scb->lun = cmd->device->lun; + + /* copy the command */ + memcpy(scb->CDB, cmd->cmnd, cmd->cmd_len); + + /* map sense buffer */ + scb->sense_buf_length = SCSI_SENSE_BUFFERSIZE; + cmd->SCp.dma_handle = dma_map_single(&wd->pdev->dev, cmd->sense_buffer, + SCSI_SENSE_BUFFERSIZE, DMA_FROM_DEVICE); + scb->sense_buf = cpu_to_le32(cmd->SCp.dma_handle); + + /* request autosense */ + scb->SCB_options |= WD719X_SCB_FLAGS_AUTO_REQUEST_SENSE; + + /* check direction */ + if (cmd->sc_data_direction == DMA_TO_DEVICE) + scb->SCB_options |= WD719X_SCB_FLAGS_CHECK_DIRECTION + | WD719X_SCB_FLAGS_PCI_TO_SCSI; + else if (cmd->sc_data_direction == DMA_FROM_DEVICE) + scb->SCB_options |= WD719X_SCB_FLAGS_CHECK_DIRECTION; + + /* Scather/gather */ + count_sg = scsi_dma_map(cmd); + if (count_sg < 0) { + wd719x_finish_cmd(cmd, DID_ERROR); + spin_unlock_irqrestore(wd->sh->host_lock, flags); + return 0; + } + BUG_ON(count_sg > WD719X_SG); + + if (count_sg) { + struct scatterlist *sg; + + scb->data_length = cpu_to_le32(count_sg * + sizeof(struct wd719x_sglist)); + scb->data_p = cpu_to_le32(scb->phys + + offsetof(struct wd719x_scb, sg_list)); + + scsi_for_each_sg(cmd, sg, count_sg, i) { + scb->sg_list[i].ptr = cpu_to_le32(sg_dma_address(sg)); + scb->sg_list[i].length = cpu_to_le32(sg_dma_len(sg)); + } + scb->SCB_options |= WD719X_SCB_FLAGS_DO_SCATTER_GATHER; + } else { /* zero length */ + scb->data_length = 0; + scb->data_p = 0; + } + + /* check if the Command register is free */ + if (wd719x_readb(wd, WD719X_AMR_COMMAND) != WD719X_CMD_READY) { + spin_unlock_irqrestore(wd->sh->host_lock, flags); + return SCSI_MLQUEUE_HOST_BUSY; + } + + /* write pointer to the AMR */ + wd719x_writel(wd, WD719X_AMR_SCB_IN, scb->phys); + /* send SCB opcode */ + wd719x_writeb(wd, WD719X_AMR_COMMAND, WD719X_CMD_PROCESS_SCB); + + spin_unlock_irqrestore(wd->sh->host_lock, flags); + + return 0; +} + +static int wd719x_chip_init(struct wd719x *wd) +{ + int i, ret; + u32 risc_init[3]; + const struct firmware *fw_wcs, *fw_risc; + const char fwname_wcs[] = "wd719x-wcs.bin"; + const char fwname_risc[] = "wd719x-risc.bin"; + + memset(wd->hash_virt, 0, WD719X_HASH_TABLE_SIZE); + + /* WCS (sequencer) firmware */ + ret = request_firmware(&fw_wcs, fwname_wcs, &wd->pdev->dev); + if (ret) { + dev_err(&wd->pdev->dev, "Unable to load firmware %s: %d\n", + fwname_wcs, ret); + return ret; + } + /* RISC firmware */ + ret = request_firmware(&fw_risc, fwname_risc, &wd->pdev->dev); + if (ret) { + dev_err(&wd->pdev->dev, "Unable to load firmware %s: %d\n", + fwname_risc, ret); + release_firmware(fw_wcs); + return ret; + } + wd->fw_size = ALIGN(fw_wcs->size, 4) + fw_risc->size; + + if (!wd->fw_virt) + wd->fw_virt = pci_alloc_consistent(wd->pdev, wd->fw_size, + &wd->fw_phys); + if (!wd->fw_virt) { + ret = -ENOMEM; + goto wd719x_init_end; + } + + /* make a fresh copy of WCS and RISC code */ + memcpy(wd->fw_virt, fw_wcs->data, fw_wcs->size); + memcpy(wd->fw_virt + ALIGN(fw_wcs->size, 4), fw_risc->data, + fw_risc->size); + + /* Reset the Spider Chip and adapter itself */ + wd719x_writeb(wd, WD719X_PCI_PORT_RESET, WD719X_PCI_RESET); + udelay(WD719X_WAIT_FOR_RISC); + /* Clear PIO mode bits set by BIOS */ + wd719x_writeb(wd, WD719X_AMR_CMD_PARAM, 0); + /* ensure RISC is not running */ + wd719x_writeb(wd, WD719X_PCI_MODE_SELECT, 0); + /* ensure command port is ready */ + wd719x_writeb(wd, WD719X_AMR_COMMAND, 0); + if (wd719x_wait_ready(wd)) { + ret = -ETIMEDOUT; + goto wd719x_init_end; + } + + /* Transfer the first 2K words of RISC code to kick start the uP */ + risc_init[0] = wd->fw_phys; /* WCS FW */ + risc_init[1] = wd->fw_phys + ALIGN(fw_wcs->size, 4); /* RISC FW */ + risc_init[2] = wd->hash_phys; /* hash table */ + + /* clear DMA status */ + wd719x_writeb(wd, WD719X_PCI_CHANNEL2_3STATUS, 0); + + /* address to read firmware from */ + wd719x_writel(wd, WD719X_PCI_EXTERNAL_ADDR, risc_init[1]); + /* base address to write firmware to (on card) */ + wd719x_writew(wd, WD719X_PCI_INTERNAL_ADDR, WD719X_PRAM_BASE_ADDR); + /* size: first 2K words */ + wd719x_writew(wd, WD719X_PCI_DMA_TRANSFER_SIZE, 2048 * 2); + /* start DMA */ + wd719x_writeb(wd, WD719X_PCI_CHANNEL2_3CMD, WD719X_START_CHANNEL2_3DMA); + + /* wait for DMA to complete */ + i = WD719X_WAIT_FOR_RISC; + while (i-- > 0) { + u8 status = wd719x_readb(wd, WD719X_PCI_CHANNEL2_3STATUS); + if (status == WD719X_START_CHANNEL2_3DONE) + break; + if (status == WD719X_START_CHANNEL2_3ABORT) { + dev_warn(&wd->pdev->dev, "RISC bootstrap failed: DMA aborted\n"); + ret = -EIO; + goto wd719x_init_end; + } + udelay(1); + } + if (i < 1) { + dev_warn(&wd->pdev->dev, "RISC bootstrap failed: DMA timeout\n"); + ret = -ETIMEDOUT; + goto wd719x_init_end; + } + + /* firmware is loaded, now initialize and wake up the RISC */ + /* write RISC initialization long words to Spider */ + wd719x_writel(wd, WD719X_AMR_SCB_IN, risc_init[0]); + wd719x_writel(wd, WD719X_AMR_SCB_IN + 4, risc_init[1]); + wd719x_writel(wd, WD719X_AMR_SCB_IN + 8, risc_init[2]); + + /* disable interrupts during initialization of RISC */ + wd719x_writeb(wd, WD719X_AMR_CMD_PARAM, WD719X_DISABLE_INT); + + /* issue INITIALIZE RISC comand */ + wd719x_writeb(wd, WD719X_AMR_COMMAND, WD719X_CMD_INIT_RISC); + /* enable advanced mode (wake up RISC) */ + wd719x_writeb(wd, WD719X_PCI_MODE_SELECT, WD719X_ENABLE_ADVANCE_MODE); + udelay(WD719X_WAIT_FOR_RISC); + + ret = wd719x_wait_done(wd, WD719X_WAIT_FOR_RISC); + /* clear interrupt status register */ + wd719x_writeb(wd, WD719X_AMR_INT_STATUS, WD719X_INT_NONE); + if (ret) { + dev_warn(&wd->pdev->dev, "Unable to initialize RISC\n"); + goto wd719x_init_end; + } + /* RISC is up and running */ + + /* Read FW version from RISC */ + ret = wd719x_direct_cmd(wd, WD719X_CMD_READ_FIRMVER, 0, 0, 0, 0, + WD719X_WAIT_FOR_RISC); + if (ret) { + dev_warn(&wd->pdev->dev, "Unable to read firmware version\n"); + goto wd719x_init_end; + } + dev_info(&wd->pdev->dev, "RISC initialized with firmware version %.2x.%.2x\n", + wd719x_readb(wd, WD719X_AMR_SCB_OUT + 1), + wd719x_readb(wd, WD719X_AMR_SCB_OUT)); + + /* RESET SCSI bus */ + ret = wd719x_direct_cmd(wd, WD719X_CMD_BUSRESET, 0, 0, 0, 0, + WD719X_WAIT_FOR_SCSI_RESET); + if (ret) { + dev_warn(&wd->pdev->dev, "SCSI bus reset failed\n"); + goto wd719x_init_end; + } + + /* use HostParameter structure to set Spider's Host Parameter Block */ + ret = wd719x_direct_cmd(wd, WD719X_CMD_SET_PARAM, 0, + sizeof(struct wd719x_host_param), 0, + wd->params_phys, WD719X_WAIT_FOR_RISC); + if (ret) { + dev_warn(&wd->pdev->dev, "Failed to set HOST PARAMETERS\n"); + goto wd719x_init_end; + } + + /* initiate SCAM (does nothing if disabled in BIOS) */ + /* bug?: we should pass a mask of static IDs which we don't have */ + ret = wd719x_direct_cmd(wd, WD719X_CMD_INIT_SCAM, 0, 0, 0, 0, + WD719X_WAIT_FOR_SCSI_RESET); + if (ret) { + dev_warn(&wd->pdev->dev, "SCAM initialization failed\n"); + goto wd719x_init_end; + } + + /* clear AMR_BIOS_SHARE_INT register */ + wd719x_writeb(wd, WD719X_AMR_BIOS_SHARE_INT, 0); + +wd719x_init_end: + release_firmware(fw_wcs); + release_firmware(fw_risc); + + return ret; +} + +static int wd719x_abort(struct scsi_cmnd *cmd) +{ + int action, result; + unsigned long flags; + struct wd719x_scb *scb = (struct wd719x_scb *)cmd->host_scribble; + struct wd719x *wd = shost_priv(cmd->device->host); + + dev_info(&wd->pdev->dev, "abort command, tag: %x\n", cmd->tag); + + action = /*cmd->tag ? WD719X_CMD_ABORT_TAG : */WD719X_CMD_ABORT; + + spin_lock_irqsave(wd->sh->host_lock, flags); + result = wd719x_direct_cmd(wd, action, cmd->device->id, + cmd->device->lun, cmd->tag, scb->phys, 0); + spin_unlock_irqrestore(wd->sh->host_lock, flags); + if (result) + return FAILED; + + return SUCCESS; +} + +static int wd719x_reset(struct scsi_cmnd *cmd, u8 opcode, u8 device) +{ + int result; + unsigned long flags; + struct wd719x *wd = shost_priv(cmd->device->host); + + dev_info(&wd->pdev->dev, "%s reset requested\n", + (opcode == WD719X_CMD_BUSRESET) ? "bus" : "device"); + + spin_lock_irqsave(wd->sh->host_lock, flags); + result = wd719x_direct_cmd(wd, opcode, device, 0, 0, 0, + WD719X_WAIT_FOR_SCSI_RESET); + spin_unlock_irqrestore(wd->sh->host_lock, flags); + if (result) + return FAILED; + + return SUCCESS; +} + +static int wd719x_dev_reset(struct scsi_cmnd *cmd) +{ + return wd719x_reset(cmd, WD719X_CMD_RESET, cmd->device->id); +} + +static int wd719x_bus_reset(struct scsi_cmnd *cmd) +{ + return wd719x_reset(cmd, WD719X_CMD_BUSRESET, 0); +} + +static int wd719x_host_reset(struct scsi_cmnd *cmd) +{ + struct wd719x *wd = shost_priv(cmd->device->host); + struct wd719x_scb *scb, *tmp; + unsigned long flags; + int result; + + dev_info(&wd->pdev->dev, "host reset requested\n"); + spin_lock_irqsave(wd->sh->host_lock, flags); + /* Try to reinit the RISC */ + if (wd719x_chip_init(wd) == 0) + result = SUCCESS; + else + result = FAILED; + + /* flush all SCBs */ + list_for_each_entry_safe(scb, tmp, &wd->active_scbs, list) { + struct scsi_cmnd *tmp_cmd = scb->cmd; + wd719x_finish_cmd(tmp_cmd, result); + } + spin_unlock_irqrestore(wd->sh->host_lock, flags); + + return result; +} + +static int wd719x_biosparam(struct scsi_device *sdev, struct block_device *bdev, + sector_t capacity, int geom[]) +{ + if (capacity >= 0x200000) { + geom[0] = 255; /* heads */ + geom[1] = 63; /* sectors */ + } else { + geom[0] = 64; /* heads */ + geom[1] = 32; /* sectors */ + } + geom[2] = sector_div(capacity, geom[0] * geom[1]); /* cylinders */ + + return 0; +} + +/* process a SCB-completion interrupt */ +static inline void wd719x_interrupt_SCB(struct wd719x *wd, + union wd719x_regs regs, + struct wd719x_scb *scb) +{ + struct scsi_cmnd *cmd; + int result; + + /* now have to find result from card */ + switch (regs.bytes.SUE) { + case WD719X_SUE_NOERRORS: + result = DID_OK; + break; + case WD719X_SUE_REJECTED: + dev_err(&wd->pdev->dev, "command rejected\n"); + result = DID_ERROR; + break; + case WD719X_SUE_SCBQFULL: + dev_err(&wd->pdev->dev, "SCB queue is full\n"); + result = DID_ERROR; + break; + case WD719X_SUE_TERM: + dev_dbg(&wd->pdev->dev, "SCB terminated by direct command\n"); + result = DID_ABORT; /* or DID_RESET? */ + break; + case WD719X_SUE_CHAN1ABORT: + case WD719X_SUE_CHAN23ABORT: + result = DID_ABORT; + dev_err(&wd->pdev->dev, "DMA abort\n"); + break; + case WD719X_SUE_CHAN1PAR: + case WD719X_SUE_CHAN23PAR: + result = DID_PARITY; + dev_err(&wd->pdev->dev, "DMA parity error\n"); + break; + case WD719X_SUE_TIMEOUT: + result = DID_TIME_OUT; + dev_dbg(&wd->pdev->dev, "selection timeout\n"); + break; + case WD719X_SUE_RESET: + dev_dbg(&wd->pdev->dev, "bus reset occured\n"); + result = DID_RESET; + break; + case WD719X_SUE_BUSERROR: + dev_dbg(&wd->pdev->dev, "SCSI bus error\n"); + result = DID_ERROR; + break; + case WD719X_SUE_WRONGWAY: + dev_err(&wd->pdev->dev, "wrong data transfer direction\n"); + result = DID_ERROR; + break; + case WD719X_SUE_BADPHASE: + dev_err(&wd->pdev->dev, "invalid SCSI phase\n"); + result = DID_ERROR; + break; + case WD719X_SUE_TOOLONG: + dev_err(&wd->pdev->dev, "record too long\n"); + result = DID_ERROR; + break; + case WD719X_SUE_BUSFREE: + dev_err(&wd->pdev->dev, "unexpected bus free\n"); + result = DID_NO_CONNECT; /* or DID_ERROR ???*/ + break; + case WD719X_SUE_ARSDONE: + dev_dbg(&wd->pdev->dev, "auto request sense\n"); + if (regs.bytes.SCSI == 0) + result = DID_OK; + else + result = DID_PARITY; + break; + case WD719X_SUE_IGNORED: + dev_err(&wd->pdev->dev, "target id %d ignored command\n", + scb->cmd->device->id); + result = DID_NO_CONNECT; + break; + case WD719X_SUE_WRONGTAGS: + dev_err(&wd->pdev->dev, "reversed tags\n"); + result = DID_ERROR; + break; + case WD719X_SUE_BADTAGS: + dev_err(&wd->pdev->dev, "tag type not supported by target\n"); + result = DID_ERROR; + break; + case WD719X_SUE_NOSCAMID: + dev_err(&wd->pdev->dev, "no SCAM soft ID available\n"); + result = DID_ERROR; + break; + default: + dev_warn(&wd->pdev->dev, "unknown SUE error code: 0x%x\n", + regs.bytes.SUE); + result = DID_ERROR; + break; + } + cmd = scb->cmd; + + wd719x_finish_cmd(cmd, result); +} + +static irqreturn_t wd719x_interrupt(int irq, void *dev_id) +{ + struct wd719x *wd = dev_id; + union wd719x_regs regs; + unsigned long flags; + u32 SCB_out; + + spin_lock_irqsave(wd->sh->host_lock, flags); + /* read SCB pointer back from card */ + SCB_out = wd719x_readl(wd, WD719X_AMR_SCB_OUT); + /* read all status info at once */ + regs.all = cpu_to_le32(wd719x_readl(wd, WD719X_AMR_OP_CODE)); + + switch (regs.bytes.INT) { + case WD719X_INT_NONE: + spin_unlock_irqrestore(wd->sh->host_lock, flags); + return IRQ_NONE; + case WD719X_INT_LINKNOSTATUS: + dev_err(&wd->pdev->dev, "linked command completed with no status\n"); + break; + case WD719X_INT_BADINT: + dev_err(&wd->pdev->dev, "unsolicited interrupt\n"); + break; + case WD719X_INT_NOERRORS: + case WD719X_INT_LINKNOERRORS: + case WD719X_INT_ERRORSLOGGED: + case WD719X_INT_SPIDERFAILED: + /* was the cmd completed a direct or SCB command? */ + if (regs.bytes.OPC == WD719X_CMD_PROCESS_SCB) { + struct wd719x_scb *scb; + list_for_each_entry(scb, &wd->active_scbs, list) + if (SCB_out == scb->phys) + break; + if (SCB_out == scb->phys) + wd719x_interrupt_SCB(wd, regs, scb); + else + dev_err(&wd->pdev->dev, "card returned invalid SCB pointer\n"); + } else + dev_warn(&wd->pdev->dev, "direct command 0x%x completed\n", + regs.bytes.OPC); + break; + case WD719X_INT_PIOREADY: + dev_err(&wd->pdev->dev, "card indicates PIO data ready but we never use PIO\n"); + /* interrupt will not be cleared until all data is read */ + break; + default: + dev_err(&wd->pdev->dev, "unknown interrupt reason: %d\n", + regs.bytes.INT); + + } + /* clear interrupt so another can happen */ + wd719x_writeb(wd, WD719X_AMR_INT_STATUS, WD719X_INT_NONE); + spin_unlock_irqrestore(wd->sh->host_lock, flags); + + return IRQ_HANDLED; +} + +static void wd719x_eeprom_reg_read(struct eeprom_93cx6 *eeprom) +{ + struct wd719x *wd = eeprom->data; + u8 reg = wd719x_readb(wd, WD719X_PCI_GPIO_DATA); + + eeprom->reg_data_out = reg & WD719X_EE_DO; +} + +static void wd719x_eeprom_reg_write(struct eeprom_93cx6 *eeprom) +{ + struct wd719x *wd = eeprom->data; + u8 reg = 0; + + if (eeprom->reg_data_in) + reg |= WD719X_EE_DI; + if (eeprom->reg_data_clock) + reg |= WD719X_EE_CLK; + if (eeprom->reg_chip_select) + reg |= WD719X_EE_CS; + + wd719x_writeb(wd, WD719X_PCI_GPIO_DATA, reg); +} + +/* read config from EEPROM so it can be downloaded by the RISC on (re-)init */ +static void wd719x_read_eeprom(struct wd719x *wd) +{ + struct eeprom_93cx6 eeprom; + u8 gpio; + struct wd719x_eeprom_header header; + + eeprom.data = wd; + eeprom.register_read = wd719x_eeprom_reg_read; + eeprom.register_write = wd719x_eeprom_reg_write; + eeprom.width = PCI_EEPROM_WIDTH_93C46; + + /* set all outputs to low */ + wd719x_writeb(wd, WD719X_PCI_GPIO_DATA, 0); + /* configure GPIO pins */ + gpio = wd719x_readb(wd, WD719X_PCI_GPIO_CONTROL); + /* GPIO outputs */ + gpio &= (~(WD719X_EE_CLK | WD719X_EE_DI | WD719X_EE_CS)); + /* GPIO input */ + gpio |= WD719X_EE_DO; + wd719x_writeb(wd, WD719X_PCI_GPIO_CONTROL, gpio); + + /* read EEPROM header */ + eeprom_93cx6_multireadb(&eeprom, 0, (u8 *)&header, sizeof(header)); + + if (header.sig1 == 'W' && header.sig2 == 'D') + eeprom_93cx6_multireadb(&eeprom, header.cfg_offset, + (u8 *)wd->params, + sizeof(struct wd719x_host_param)); + else { /* default EEPROM values */ + dev_warn(&wd->pdev->dev, "EEPROM signature is invalid (0x%02x 0x%02x), using default values\n", + header.sig1, header.sig2); + wd->params->ch_1_th = 0x10; /* 16 DWs = 64 B */ + wd->params->scsi_conf = 0x4c; /* 48ma, spue, parity check */ + wd->params->own_scsi_id = 0x07; /* ID 7, SCAM disabled */ + wd->params->sel_timeout = 0x4d; /* 250 ms */ + wd->params->sleep_timer = 0x01; + wd->params->cdb_size = cpu_to_le16(0x5555); /* all 6 B */ + wd->params->scsi_pad = 0x1b; + if (wd->type == WD719X_TYPE_7193) /* narrow card - disable */ + wd->params->wide = cpu_to_le32(0x00000000); + else /* initiate & respond to WIDE messages */ + wd->params->wide = cpu_to_le32(0xffffffff); + wd->params->sync = cpu_to_le32(0xffffffff); + wd->params->soft_mask = 0x00; /* all disabled */ + wd->params->unsol_mask = 0x00; /* all disabled */ + } + /* disable TAGGED messages */ + wd->params->tag_en = cpu_to_le16(0x0000); +} + +/* Read card type from GPIO bits 1 and 3 */ +static enum wd719x_card_type wd719x_detect_type(struct wd719x *wd) +{ + u8 card = wd719x_readb(wd, WD719X_PCI_GPIO_CONTROL); + + card |= WD719X_GPIO_ID_BITS; + wd719x_writeb(wd, WD719X_PCI_GPIO_CONTROL, card); + card = wd719x_readb(wd, WD719X_PCI_GPIO_DATA) & WD719X_GPIO_ID_BITS; + switch (card) { + case 0x08: + return WD719X_TYPE_7193; + case 0x02: + return WD719X_TYPE_7197; + case 0x00: + return WD719X_TYPE_7296; + default: + dev_warn(&wd->pdev->dev, "unknown card type 0x%x\n", card); + return WD719X_TYPE_UNKNOWN; + } +} + +static int wd719x_board_found(struct Scsi_Host *sh) +{ + struct wd719x *wd = shost_priv(sh); + char *card_types[] = { "Unknown card", "WD7193", "WD7197", "WD7296" }; + int ret; + + INIT_LIST_HEAD(&wd->active_scbs); + INIT_LIST_HEAD(&wd->free_scbs); + + sh->base = pci_resource_start(wd->pdev, 0); + + wd->type = wd719x_detect_type(wd); + + wd->sh = sh; + sh->irq = wd->pdev->irq; + wd->fw_virt = NULL; + + /* memory area for host (EEPROM) parameters */ + wd->params = pci_alloc_consistent(wd->pdev, + sizeof(struct wd719x_host_param), + &wd->params_phys); + if (!wd->params) { + dev_warn(&wd->pdev->dev, "unable to allocate parameter buffer\n"); + return -ENOMEM; + } + + /* memory area for the RISC for hash table of outstanding requests */ + wd->hash_virt = pci_alloc_consistent(wd->pdev, WD719X_HASH_TABLE_SIZE, + &wd->hash_phys); + if (!wd->hash_virt) { + dev_warn(&wd->pdev->dev, "unable to allocate hash buffer\n"); + ret = -ENOMEM; + goto fail_free_params; + } + + ret = request_irq(wd->pdev->irq, wd719x_interrupt, IRQF_SHARED, + "wd719x", wd); + if (ret) { + dev_warn(&wd->pdev->dev, "unable to assign IRQ %d\n", + wd->pdev->irq); + goto fail_free_hash; + } + + /* read parameters from EEPROM */ + wd719x_read_eeprom(wd); + + ret = wd719x_chip_init(wd); + if (ret) + goto fail_free_irq; + + sh->this_id = wd->params->own_scsi_id & WD719X_EE_SCSI_ID_MASK; + + dev_info(&wd->pdev->dev, "%s at I/O 0x%lx, IRQ %u, SCSI ID %d\n", + card_types[wd->type], sh->base, sh->irq, sh->this_id); + + return 0; + +fail_free_irq: + free_irq(wd->pdev->irq, wd); +fail_free_hash: + pci_free_consistent(wd->pdev, WD719X_HASH_TABLE_SIZE, wd->hash_virt, + wd->hash_phys); +fail_free_params: + pci_free_consistent(wd->pdev, sizeof(struct wd719x_host_param), + wd->params, wd->params_phys); + + return ret; +} + +static struct scsi_host_template wd719x_template = { + .name = "Western Digital 719x", + .queuecommand = wd719x_queuecommand, + .eh_abort_handler = wd719x_abort, + .eh_device_reset_handler = wd719x_dev_reset, + .eh_bus_reset_handler = wd719x_bus_reset, + .eh_host_reset_handler = wd719x_host_reset, + .bios_param = wd719x_biosparam, + .proc_name = "wd719x", + .can_queue = 255, + .this_id = 7, + .sg_tablesize = WD719X_SG, + .cmd_per_lun = WD719X_CMD_PER_LUN, + .use_clustering = ENABLE_CLUSTERING, +}; + +static int wd719x_pci_probe(struct pci_dev *pdev, const struct pci_device_id *d) +{ + int err; + struct Scsi_Host *sh; + struct wd719x *wd; + + err = pci_enable_device(pdev); + if (err) + goto fail; + + if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32))) { + dev_warn(&pdev->dev, "Unable to set 32-bit DMA mask\n"); + goto disable_device; + } + + err = pci_request_regions(pdev, "wd719x"); + if (err) + goto disable_device; + pci_set_master(pdev); + + err = -ENODEV; + if (pci_resource_len(pdev, 0) == 0) + goto release_region; + + err = -ENOMEM; + sh = scsi_host_alloc(&wd719x_template, sizeof(struct wd719x)); + if (!sh) + goto release_region; + + wd = shost_priv(sh); + wd->base = pci_iomap(pdev, 0, 0); + if (!wd->base) + goto free_host; + wd->pdev = pdev; + + err = wd719x_board_found(sh); + if (err) + goto unmap; + + err = scsi_add_host(sh, &wd->pdev->dev); + if (err) + goto destroy; + + scsi_scan_host(sh); + + pci_set_drvdata(pdev, sh); + return 0; + +destroy: + wd719x_destroy(wd); +unmap: + pci_iounmap(pdev, wd->base); +free_host: + scsi_host_put(sh); +release_region: + pci_release_regions(pdev); +disable_device: + pci_disable_device(pdev); +fail: + return err; +} + + +static void wd719x_pci_remove(struct pci_dev *pdev) +{ + struct Scsi_Host *sh = pci_get_drvdata(pdev); + struct wd719x *wd = shost_priv(sh); + + scsi_remove_host(sh); + wd719x_destroy(wd); + pci_iounmap(pdev, wd->base); + pci_release_regions(pdev); + pci_disable_device(pdev); + + scsi_host_put(sh); +} + +static DEFINE_PCI_DEVICE_TABLE(wd719x_pci_table) = { + { PCI_DEVICE(PCI_VENDOR_ID_WD, 0x3296) }, + {} +}; + +MODULE_DEVICE_TABLE(pci, wd719x_pci_table); + +static struct pci_driver wd719x_pci_driver = { + .name = "wd719x", + .id_table = wd719x_pci_table, + .probe = wd719x_pci_probe, + .remove = wd719x_pci_remove, +}; + +static int __init wd719x_init(void) +{ + return pci_register_driver(&wd719x_pci_driver); +} + +static void __exit wd719x_exit(void) +{ + pci_unregister_driver(&wd719x_pci_driver); +} + +module_init(wd719x_init); +module_exit(wd719x_exit); + +MODULE_DESCRIPTION("Western Digital WD7193/7197/7296 SCSI driver"); +MODULE_AUTHOR("Ondrej Zary, Aaron Dewell, Juergen Gaertner"); +MODULE_LICENSE("GPL"); +MODULE_FIRMWARE("wd719x-wcs.bin"); +MODULE_FIRMWARE("wd719x-risc.bin"); |