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599 lines
16 KiB
599 lines
16 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* Driver for Future Domain TMC-16x0 and TMC-3260 SCSI host adapters |
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* Copyright 2019 Ondrej Zary |
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* |
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* Original driver by |
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* Rickard E. Faith, [email protected] |
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* |
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* Future Domain BIOS versions supported for autodetect: |
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* 2.0, 3.0, 3.2, 3.4 (1.0), 3.5 (2.0), 3.6, 3.61 |
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* Chips supported: |
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* TMC-1800, TMC-18C50, TMC-18C30, TMC-36C70 |
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* Boards supported: |
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* Future Domain TMC-1650, TMC-1660, TMC-1670, TMC-1680, TMC-1610M/MER/MEX |
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* Future Domain TMC-3260 (PCI) |
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* Quantum ISA-200S, ISA-250MG |
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* Adaptec AHA-2920A (PCI) [BUT *NOT* AHA-2920C -- use aic7xxx instead] |
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* IBM ? |
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* |
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* NOTE: |
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* |
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* The Adaptec AHA-2920C has an Adaptec AIC-7850 chip on it. |
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* Use the aic7xxx driver for this board. |
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* |
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* The Adaptec AHA-2920A has a Future Domain chip on it, so this is the right |
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* driver for that card. Unfortunately, the boxes will probably just say |
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* "2920", so you'll have to look on the card for a Future Domain logo, or a |
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* letter after the 2920. |
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* |
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* If you have a TMC-8xx or TMC-9xx board, then this is not the driver for |
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* your board. |
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* |
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* DESCRIPTION: |
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* |
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* This is the Linux low-level SCSI driver for Future Domain TMC-1660/1680 |
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* TMC-1650/1670, and TMC-3260 SCSI host adapters. The 1650 and 1670 have a |
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* 25-pin external connector, whereas the 1660 and 1680 have a SCSI-2 50-pin |
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* high-density external connector. The 1670 and 1680 have floppy disk |
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* controllers built in. The TMC-3260 is a PCI bus card. |
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* |
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* Future Domain's older boards are based on the TMC-1800 chip, and this |
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* driver was originally written for a TMC-1680 board with the TMC-1800 chip. |
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* More recently, boards are being produced with the TMC-18C50 and TMC-18C30 |
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* chips. |
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* |
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* Please note that the drive ordering that Future Domain implemented in BIOS |
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* versions 3.4 and 3.5 is the opposite of the order (currently) used by the |
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* rest of the SCSI industry. |
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* |
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* |
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* REFERENCES USED: |
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* |
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* "TMC-1800 SCSI Chip Specification (FDC-1800T)", Future Domain Corporation, |
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* 1990. |
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* |
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* "Technical Reference Manual: 18C50 SCSI Host Adapter Chip", Future Domain |
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* Corporation, January 1992. |
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* |
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* "LXT SCSI Products: Specifications and OEM Technical Manual (Revision |
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* B/September 1991)", Maxtor Corporation, 1991. |
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* |
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* "7213S product Manual (Revision P3)", Maxtor Corporation, 1992. |
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* |
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* "Draft Proposed American National Standard: Small Computer System |
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* Interface - 2 (SCSI-2)", Global Engineering Documents. (X3T9.2/86-109, |
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* revision 10h, October 17, 1991) |
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* |
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* Private communications, Drew Eckhardt ([email protected]) and Eric |
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* Youngdale ([email protected]), 1992. |
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* |
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* Private communication, Tuong Le (Future Domain Engineering department), |
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* 1994. (Disk geometry computations for Future Domain BIOS version 3.4, and |
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* TMC-18C30 detection.) |
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* |
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* Hogan, Thom. The Programmer's PC Sourcebook. Microsoft Press, 1988. Page |
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* 60 (2.39: Disk Partition Table Layout). |
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* |
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* "18C30 Technical Reference Manual", Future Domain Corporation, 1993, page |
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* 6-1. |
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*/ |
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|
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#include <linux/module.h> |
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#include <linux/interrupt.h> |
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#include <linux/delay.h> |
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#include <linux/pci.h> |
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#include <linux/workqueue.h> |
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#include <scsi/scsicam.h> |
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#include <scsi/scsi_cmnd.h> |
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#include <scsi/scsi_device.h> |
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#include <scsi/scsi_host.h> |
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#include "fdomain.h" |
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|
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/* |
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* FIFO_COUNT: The host adapter has an 8K cache (host adapters based on the |
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* 18C30 chip have a 2k cache). When this many 512 byte blocks are filled by |
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* the SCSI device, an interrupt will be raised. Therefore, this could be as |
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* low as 0, or as high as 16. Note, however, that values which are too high |
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* or too low seem to prevent any interrupts from occurring, and thereby lock |
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* up the machine. |
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*/ |
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#define FIFO_COUNT 2 /* Number of 512 byte blocks before INTR */ |
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#define PARITY_MASK ACTL_PAREN /* Parity enabled, 0 = disabled */ |
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|
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enum chip_type { |
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unknown = 0x00, |
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tmc1800 = 0x01, |
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tmc18c50 = 0x02, |
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tmc18c30 = 0x03, |
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}; |
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|
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struct fdomain { |
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int base; |
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struct scsi_cmnd *cur_cmd; |
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enum chip_type chip; |
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struct work_struct work; |
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}; |
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|
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static inline void fdomain_make_bus_idle(struct fdomain *fd) |
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{ |
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outb(0, fd->base + REG_BCTL); |
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outb(0, fd->base + REG_MCTL); |
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if (fd->chip == tmc18c50 || fd->chip == tmc18c30) |
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/* Clear forced intr. */ |
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outb(ACTL_RESET | ACTL_CLRFIRQ | PARITY_MASK, |
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fd->base + REG_ACTL); |
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else |
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outb(ACTL_RESET | PARITY_MASK, fd->base + REG_ACTL); |
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} |
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|
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static enum chip_type fdomain_identify(int port) |
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{ |
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u16 id = inb(port + REG_ID_LSB) | inb(port + REG_ID_MSB) << 8; |
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|
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switch (id) { |
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case 0x6127: |
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return tmc1800; |
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case 0x60e9: /* 18c50 or 18c30 */ |
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break; |
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default: |
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return unknown; |
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} |
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|
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/* Try to toggle 32-bit mode. This only works on an 18c30 chip. */ |
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outb(CFG2_32BIT, port + REG_CFG2); |
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if ((inb(port + REG_CFG2) & CFG2_32BIT)) { |
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outb(0, port + REG_CFG2); |
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if ((inb(port + REG_CFG2) & CFG2_32BIT) == 0) |
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return tmc18c30; |
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} |
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/* If that failed, we are an 18c50. */ |
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return tmc18c50; |
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} |
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|
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static int fdomain_test_loopback(int base) |
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{ |
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int i; |
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|
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for (i = 0; i < 255; i++) { |
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outb(i, base + REG_LOOPBACK); |
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if (inb(base + REG_LOOPBACK) != i) |
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return 1; |
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} |
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return 0; |
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} |
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static void fdomain_reset(int base) |
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{ |
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outb(BCTL_RST, base + REG_BCTL); |
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mdelay(20); |
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outb(0, base + REG_BCTL); |
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mdelay(1150); |
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outb(0, base + REG_MCTL); |
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outb(PARITY_MASK, base + REG_ACTL); |
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} |
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|
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static int fdomain_select(struct Scsi_Host *sh, int target) |
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{ |
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int status; |
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unsigned long timeout; |
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struct fdomain *fd = shost_priv(sh); |
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outb(BCTL_BUSEN | BCTL_SEL, fd->base + REG_BCTL); |
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outb(BIT(sh->this_id) | BIT(target), fd->base + REG_SCSI_DATA_NOACK); |
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|
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/* Stop arbitration and enable parity */ |
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outb(PARITY_MASK, fd->base + REG_ACTL); |
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timeout = 350; /* 350 msec */ |
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do { |
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status = inb(fd->base + REG_BSTAT); |
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if (status & BSTAT_BSY) { |
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/* Enable SCSI Bus */ |
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/* (on error, should make bus idle with 0) */ |
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outb(BCTL_BUSEN, fd->base + REG_BCTL); |
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return 0; |
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} |
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mdelay(1); |
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} while (--timeout); |
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fdomain_make_bus_idle(fd); |
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return 1; |
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} |
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static void fdomain_finish_cmd(struct fdomain *fd) |
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{ |
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outb(0, fd->base + REG_ICTL); |
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fdomain_make_bus_idle(fd); |
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fd->cur_cmd->scsi_done(fd->cur_cmd); |
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fd->cur_cmd = NULL; |
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} |
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|
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static void fdomain_read_data(struct scsi_cmnd *cmd) |
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{ |
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struct fdomain *fd = shost_priv(cmd->device->host); |
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unsigned char *virt, *ptr; |
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size_t offset, len; |
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|
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while ((len = inw(fd->base + REG_FIFO_COUNT)) > 0) { |
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offset = scsi_bufflen(cmd) - scsi_get_resid(cmd); |
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virt = scsi_kmap_atomic_sg(scsi_sglist(cmd), scsi_sg_count(cmd), |
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&offset, &len); |
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ptr = virt + offset; |
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if (len & 1) |
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*ptr++ = inb(fd->base + REG_FIFO); |
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if (len > 1) |
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insw(fd->base + REG_FIFO, ptr, len >> 1); |
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scsi_set_resid(cmd, scsi_get_resid(cmd) - len); |
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scsi_kunmap_atomic_sg(virt); |
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} |
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} |
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static void fdomain_write_data(struct scsi_cmnd *cmd) |
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{ |
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struct fdomain *fd = shost_priv(cmd->device->host); |
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/* 8k FIFO for pre-tmc18c30 chips, 2k FIFO for tmc18c30 */ |
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int FIFO_Size = fd->chip == tmc18c30 ? 0x800 : 0x2000; |
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unsigned char *virt, *ptr; |
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size_t offset, len; |
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while ((len = FIFO_Size - inw(fd->base + REG_FIFO_COUNT)) > 512) { |
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offset = scsi_bufflen(cmd) - scsi_get_resid(cmd); |
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if (len + offset > scsi_bufflen(cmd)) { |
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len = scsi_bufflen(cmd) - offset; |
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if (len == 0) |
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break; |
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} |
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virt = scsi_kmap_atomic_sg(scsi_sglist(cmd), scsi_sg_count(cmd), |
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&offset, &len); |
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ptr = virt + offset; |
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if (len & 1) |
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outb(*ptr++, fd->base + REG_FIFO); |
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if (len > 1) |
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outsw(fd->base + REG_FIFO, ptr, len >> 1); |
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scsi_set_resid(cmd, scsi_get_resid(cmd) - len); |
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scsi_kunmap_atomic_sg(virt); |
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} |
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} |
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static void fdomain_work(struct work_struct *work) |
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{ |
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struct fdomain *fd = container_of(work, struct fdomain, work); |
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struct Scsi_Host *sh = container_of((void *)fd, struct Scsi_Host, |
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hostdata); |
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struct scsi_cmnd *cmd = fd->cur_cmd; |
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unsigned long flags; |
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int status; |
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int done = 0; |
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spin_lock_irqsave(sh->host_lock, flags); |
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if (cmd->SCp.phase & in_arbitration) { |
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status = inb(fd->base + REG_ASTAT); |
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if (!(status & ASTAT_ARB)) { |
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set_host_byte(cmd, DID_BUS_BUSY); |
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fdomain_finish_cmd(fd); |
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goto out; |
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} |
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cmd->SCp.phase = in_selection; |
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outb(ICTL_SEL | FIFO_COUNT, fd->base + REG_ICTL); |
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outb(BCTL_BUSEN | BCTL_SEL, fd->base + REG_BCTL); |
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outb(BIT(cmd->device->host->this_id) | BIT(scmd_id(cmd)), |
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fd->base + REG_SCSI_DATA_NOACK); |
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/* Stop arbitration and enable parity */ |
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outb(ACTL_IRQEN | PARITY_MASK, fd->base + REG_ACTL); |
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goto out; |
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} else if (cmd->SCp.phase & in_selection) { |
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status = inb(fd->base + REG_BSTAT); |
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if (!(status & BSTAT_BSY)) { |
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/* Try again, for slow devices */ |
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if (fdomain_select(cmd->device->host, scmd_id(cmd))) { |
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set_host_byte(cmd, DID_NO_CONNECT); |
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fdomain_finish_cmd(fd); |
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goto out; |
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} |
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/* Stop arbitration and enable parity */ |
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outb(ACTL_IRQEN | PARITY_MASK, fd->base + REG_ACTL); |
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} |
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cmd->SCp.phase = in_other; |
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outb(ICTL_FIFO | ICTL_REQ | FIFO_COUNT, fd->base + REG_ICTL); |
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outb(BCTL_BUSEN, fd->base + REG_BCTL); |
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goto out; |
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} |
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|
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/* cur_cmd->SCp.phase == in_other: this is the body of the routine */ |
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status = inb(fd->base + REG_BSTAT); |
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|
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if (status & BSTAT_REQ) { |
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switch (status & (BSTAT_MSG | BSTAT_CMD | BSTAT_IO)) { |
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case BSTAT_CMD: /* COMMAND OUT */ |
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outb(cmd->cmnd[cmd->SCp.sent_command++], |
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fd->base + REG_SCSI_DATA); |
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break; |
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case 0: /* DATA OUT -- tmc18c50/tmc18c30 only */ |
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if (fd->chip != tmc1800 && !cmd->SCp.have_data_in) { |
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cmd->SCp.have_data_in = -1; |
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outb(ACTL_IRQEN | ACTL_FIFOWR | ACTL_FIFOEN | |
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PARITY_MASK, fd->base + REG_ACTL); |
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} |
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break; |
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case BSTAT_IO: /* DATA IN -- tmc18c50/tmc18c30 only */ |
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if (fd->chip != tmc1800 && !cmd->SCp.have_data_in) { |
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cmd->SCp.have_data_in = 1; |
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outb(ACTL_IRQEN | ACTL_FIFOEN | PARITY_MASK, |
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fd->base + REG_ACTL); |
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} |
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break; |
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case BSTAT_CMD | BSTAT_IO: /* STATUS IN */ |
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cmd->SCp.Status = inb(fd->base + REG_SCSI_DATA); |
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break; |
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case BSTAT_MSG | BSTAT_CMD: /* MESSAGE OUT */ |
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outb(MESSAGE_REJECT, fd->base + REG_SCSI_DATA); |
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break; |
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case BSTAT_MSG | BSTAT_CMD | BSTAT_IO: /* MESSAGE IN */ |
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cmd->SCp.Message = inb(fd->base + REG_SCSI_DATA); |
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if (cmd->SCp.Message == COMMAND_COMPLETE) |
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++done; |
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break; |
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} |
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} |
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|
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if (fd->chip == tmc1800 && !cmd->SCp.have_data_in && |
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cmd->SCp.sent_command >= cmd->cmd_len) { |
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if (cmd->sc_data_direction == DMA_TO_DEVICE) { |
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cmd->SCp.have_data_in = -1; |
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outb(ACTL_IRQEN | ACTL_FIFOWR | ACTL_FIFOEN | |
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PARITY_MASK, fd->base + REG_ACTL); |
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} else { |
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cmd->SCp.have_data_in = 1; |
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outb(ACTL_IRQEN | ACTL_FIFOEN | PARITY_MASK, |
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fd->base + REG_ACTL); |
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} |
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} |
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|
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if (cmd->SCp.have_data_in == -1) /* DATA OUT */ |
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fdomain_write_data(cmd); |
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|
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if (cmd->SCp.have_data_in == 1) /* DATA IN */ |
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fdomain_read_data(cmd); |
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|
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if (done) { |
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set_status_byte(cmd, cmd->SCp.Status); |
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set_host_byte(cmd, DID_OK); |
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scsi_msg_to_host_byte(cmd, cmd->SCp.Message); |
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fdomain_finish_cmd(fd); |
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} else { |
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if (cmd->SCp.phase & disconnect) { |
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outb(ICTL_FIFO | ICTL_SEL | ICTL_REQ | FIFO_COUNT, |
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fd->base + REG_ICTL); |
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outb(0, fd->base + REG_BCTL); |
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} else |
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outb(ICTL_FIFO | ICTL_REQ | FIFO_COUNT, |
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fd->base + REG_ICTL); |
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} |
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out: |
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spin_unlock_irqrestore(sh->host_lock, flags); |
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} |
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|
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static irqreturn_t fdomain_irq(int irq, void *dev_id) |
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{ |
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struct fdomain *fd = dev_id; |
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|
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/* Is it our IRQ? */ |
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if ((inb(fd->base + REG_ASTAT) & ASTAT_IRQ) == 0) |
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return IRQ_NONE; |
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|
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outb(0, fd->base + REG_ICTL); |
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|
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/* We usually have one spurious interrupt after each command. */ |
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if (!fd->cur_cmd) /* Spurious interrupt */ |
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return IRQ_NONE; |
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|
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schedule_work(&fd->work); |
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|
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return IRQ_HANDLED; |
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} |
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|
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static int fdomain_queue(struct Scsi_Host *sh, struct scsi_cmnd *cmd) |
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{ |
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struct fdomain *fd = shost_priv(cmd->device->host); |
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unsigned long flags; |
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|
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cmd->SCp.Status = 0; |
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cmd->SCp.Message = 0; |
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cmd->SCp.have_data_in = 0; |
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cmd->SCp.sent_command = 0; |
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cmd->SCp.phase = in_arbitration; |
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scsi_set_resid(cmd, scsi_bufflen(cmd)); |
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|
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spin_lock_irqsave(sh->host_lock, flags); |
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|
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fd->cur_cmd = cmd; |
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|
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fdomain_make_bus_idle(fd); |
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|
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/* Start arbitration */ |
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outb(0, fd->base + REG_ICTL); |
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outb(0, fd->base + REG_BCTL); /* Disable data drivers */ |
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/* Set our id bit */ |
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outb(BIT(cmd->device->host->this_id), fd->base + REG_SCSI_DATA_NOACK); |
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outb(ICTL_ARB, fd->base + REG_ICTL); |
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/* Start arbitration */ |
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outb(ACTL_ARB | ACTL_IRQEN | PARITY_MASK, fd->base + REG_ACTL); |
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|
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spin_unlock_irqrestore(sh->host_lock, flags); |
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|
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return 0; |
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} |
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|
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static int fdomain_abort(struct scsi_cmnd *cmd) |
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{ |
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struct Scsi_Host *sh = cmd->device->host; |
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struct fdomain *fd = shost_priv(sh); |
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unsigned long flags; |
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|
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if (!fd->cur_cmd) |
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return FAILED; |
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|
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spin_lock_irqsave(sh->host_lock, flags); |
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|
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fdomain_make_bus_idle(fd); |
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fd->cur_cmd->SCp.phase |= aborted; |
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|
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/* Aborts are not done well. . . */ |
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set_host_byte(fd->cur_cmd, DID_ABORT); |
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fdomain_finish_cmd(fd); |
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spin_unlock_irqrestore(sh->host_lock, flags); |
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return SUCCESS; |
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} |
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|
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static int fdomain_host_reset(struct scsi_cmnd *cmd) |
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{ |
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struct Scsi_Host *sh = cmd->device->host; |
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struct fdomain *fd = shost_priv(sh); |
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unsigned long flags; |
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|
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spin_lock_irqsave(sh->host_lock, flags); |
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fdomain_reset(fd->base); |
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spin_unlock_irqrestore(sh->host_lock, flags); |
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return SUCCESS; |
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} |
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|
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static int fdomain_biosparam(struct scsi_device *sdev, |
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struct block_device *bdev, sector_t capacity, |
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int geom[]) |
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{ |
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unsigned char *p = scsi_bios_ptable(bdev); |
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|
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if (p && p[65] == 0xaa && p[64] == 0x55 /* Partition table valid */ |
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&& p[4]) { /* Partition type */ |
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geom[0] = p[5] + 1; /* heads */ |
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geom[1] = p[6] & 0x3f; /* sectors */ |
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} else { |
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if (capacity >= 0x7e0000) { |
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geom[0] = 255; /* heads */ |
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geom[1] = 63; /* sectors */ |
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} else if (capacity >= 0x200000) { |
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geom[0] = 128; /* heads */ |
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geom[1] = 63; /* sectors */ |
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} else { |
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geom[0] = 64; /* heads */ |
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geom[1] = 32; /* sectors */ |
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} |
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} |
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geom[2] = sector_div(capacity, geom[0] * geom[1]); |
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kfree(p); |
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|
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return 0; |
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} |
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|
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static struct scsi_host_template fdomain_template = { |
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.module = THIS_MODULE, |
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.name = "Future Domain TMC-16x0", |
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.proc_name = "fdomain", |
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.queuecommand = fdomain_queue, |
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.eh_abort_handler = fdomain_abort, |
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.eh_host_reset_handler = fdomain_host_reset, |
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.bios_param = fdomain_biosparam, |
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.can_queue = 1, |
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.this_id = 7, |
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.sg_tablesize = 64, |
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.dma_boundary = PAGE_SIZE - 1, |
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}; |
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|
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struct Scsi_Host *fdomain_create(int base, int irq, int this_id, |
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struct device *dev) |
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{ |
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struct Scsi_Host *sh; |
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struct fdomain *fd; |
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enum chip_type chip; |
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static const char * const chip_names[] = { |
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"Unknown", "TMC-1800", "TMC-18C50", "TMC-18C30" |
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}; |
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unsigned long irq_flags = 0; |
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|
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chip = fdomain_identify(base); |
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if (!chip) |
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return NULL; |
|
|
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fdomain_reset(base); |
|
|
|
if (fdomain_test_loopback(base)) |
|
return NULL; |
|
|
|
if (!irq) { |
|
dev_err(dev, "card has no IRQ assigned"); |
|
return NULL; |
|
} |
|
|
|
sh = scsi_host_alloc(&fdomain_template, sizeof(struct fdomain)); |
|
if (!sh) |
|
return NULL; |
|
|
|
if (this_id) |
|
sh->this_id = this_id & 0x07; |
|
|
|
sh->irq = irq; |
|
sh->io_port = base; |
|
sh->n_io_port = FDOMAIN_REGION_SIZE; |
|
|
|
fd = shost_priv(sh); |
|
fd->base = base; |
|
fd->chip = chip; |
|
INIT_WORK(&fd->work, fdomain_work); |
|
|
|
if (dev_is_pci(dev) || !strcmp(dev->bus->name, "pcmcia")) |
|
irq_flags = IRQF_SHARED; |
|
|
|
if (request_irq(irq, fdomain_irq, irq_flags, "fdomain", fd)) |
|
goto fail_put; |
|
|
|
shost_printk(KERN_INFO, sh, "%s chip at 0x%x irq %d SCSI ID %d\n", |
|
dev_is_pci(dev) ? "TMC-36C70 (PCI bus)" : chip_names[chip], |
|
base, irq, sh->this_id); |
|
|
|
if (scsi_add_host(sh, dev)) |
|
goto fail_free_irq; |
|
|
|
scsi_scan_host(sh); |
|
|
|
return sh; |
|
|
|
fail_free_irq: |
|
free_irq(irq, fd); |
|
fail_put: |
|
scsi_host_put(sh); |
|
return NULL; |
|
} |
|
EXPORT_SYMBOL_GPL(fdomain_create); |
|
|
|
int fdomain_destroy(struct Scsi_Host *sh) |
|
{ |
|
struct fdomain *fd = shost_priv(sh); |
|
|
|
cancel_work_sync(&fd->work); |
|
scsi_remove_host(sh); |
|
if (sh->irq) |
|
free_irq(sh->irq, fd); |
|
scsi_host_put(sh); |
|
return 0; |
|
} |
|
EXPORT_SYMBOL_GPL(fdomain_destroy); |
|
|
|
#ifdef CONFIG_PM_SLEEP |
|
static int fdomain_resume(struct device *dev) |
|
{ |
|
struct fdomain *fd = shost_priv(dev_get_drvdata(dev)); |
|
|
|
fdomain_reset(fd->base); |
|
return 0; |
|
} |
|
|
|
static SIMPLE_DEV_PM_OPS(fdomain_pm_ops, NULL, fdomain_resume); |
|
#endif /* CONFIG_PM_SLEEP */ |
|
|
|
MODULE_AUTHOR("Ondrej Zary, Rickard E. Faith"); |
|
MODULE_DESCRIPTION("Future Domain TMC-16x0/TMC-3260 SCSI driver"); |
|
MODULE_LICENSE("GPL");
|
|
|