projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | /* Driver for the PPA3 parallel port SCSI HBA embedded in |
| 2 | * the Iomega ZIP drive | |
| 3 | * | |
| 4 | * (c) 1996 Grant R. Guenther grant@torque.net | |
| bdca3f20 | 5 | * David Campbell |
| 1da177e4 LT |
6 | * |
| 7 | * All comments to David. | |
| 8 | */ | |
| 9 | ||
| 10 | #ifndef _PPA_H | |
| 11 | #define _PPA_H | |
| 12 | ||
| 13 | #define PPA_VERSION "2.07 (for Linux 2.4.x)" | |
| 14 | ||
| 15 | /* | |
| 16 | * this driver has been hacked by Matteo Frigo (athena@theory.lcs.mit.edu) | |
| 17 | * to support EPP and scatter-gather. [0.26-athena] | |
| 18 | * | |
| 19 | * additional hacks by David Campbell | |
| 20 | * in response to this driver "mis-behaving" on his machine. | |
| 21 | * Fixed EPP to handle "software" changing of EPP port data direction. | |
| 22 | * Chased down EPP timeouts | |
| 23 | * Made this driver "kernel version friendly" [0.28-athena] | |
| 24 | * | |
| 25 | * [ Stuff removed ] | |
| 26 | * | |
| 27 | * Corrected ppa.h for 2.1.x kernels (>=2.1.85) | |
| 28 | * Modified "Nat Semi Kludge" for extended chipsets | |
| 29 | * [1.41] | |
| 30 | * | |
| 31 | * Fixed id_probe for EPP 1.9 chipsets (misdetected as EPP 1.7) | |
| 32 | * [1.42] | |
| 33 | * | |
| 34 | * Development solely for 2.1.x kernels from now on! | |
| 35 | * [2.00] | |
| 36 | * | |
| 37 | * Hack and slash at the init code (EPP device check routine) | |
| 38 | * Added INSANE option. | |
| 39 | * [2.01] | |
| 40 | * | |
| 41 | * Patch applied to sync against the 2.1.x kernel code | |
| 42 | * Included qboot_zip.sh | |
| 43 | * [2.02] | |
| 44 | * | |
| 45 | * Cleaned up the mess left by someone else trying to fix the | |
| 46 | * asm section to keep egcc happy. The asm section no longer | |
| 47 | * exists, the nibble code is *almost* as fast as the asm code | |
| 48 | * providing it is compiled with egcc. | |
| 49 | * | |
| 50 | * Other clean ups include the follow changes: | |
| 51 | * CONFIG_SCSI_PPA_HAVE_PEDANTIC => CONFIG_SCSI_IZIP_EPP16 | |
| 52 | * added CONFIG_SCSI_IZIP_SLOW_CTR option | |
| 53 | * [2.03] | |
| 54 | * | |
| 55 | * Use ppa_wait() to check for ready AND connected status bits | |
| 56 | * Add ppa_wait() calls to ppa_completion() | |
| 57 | * by Peter Cherriman <pjc@ecs.soton.ac.uk> and | |
| 58 | * Tim Waugh <twaugh@redhat.com> | |
| 59 | * [2.04] | |
| 60 | * | |
| 61 | * Fix kernel panic on scsi timeout, 2000-08-18 [2.05] | |
| 62 | * | |
| 63 | * Avoid io_request_lock problems. | |
| 64 | * John Cavan <johncavan@home.com> [2.06] | |
| 65 | * | |
| 66 | * Busy wait for connected status bit in ppa_completion() | |
| 67 | * in order to cope with some hardware that has this bit low | |
| 68 | * for short periods of time. | |
| 69 | * Add udelay() to ppa_select() | |
| 70 | * by Peter Cherriman <pjc@ecs.soton.ac.uk> and | |
| 71 | * Oleg Makarenko <omakarenko@cyberplat.ru> | |
| 72 | * [2.07] | |
| 73 | */ | |
| 74 | /* ------ END OF USER CONFIGURABLE PARAMETERS ----- */ | |
| 75 | ||
| 1da177e4 LT |
76 | #include <linux/stddef.h> |
| 77 | #include <linux/module.h> | |
| 78 | #include <linux/kernel.h> | |
| 79 | #include <linux/ioport.h> | |
| 80 | #include <linux/delay.h> | |
| 81 | #include <linux/proc_fs.h> | |
| 82 | #include <linux/stat.h> | |
| 83 | #include <linux/blkdev.h> | |
| 84 | #include <linux/sched.h> | |
| 85 | #include <linux/interrupt.h> | |
| 86 | ||
| 87 | #include <asm/io.h> | |
| 88 | #include <scsi/scsi_host.h> | |
| 89 | /* batteries not included :-) */ | |
| 90 | ||
| 91 | /* | |
| 92 | * modes in which the driver can operate | |
| 93 | */ | |
| 94 | #define PPA_AUTODETECT 0 /* Autodetect mode */ | |
| 95 | #define PPA_NIBBLE 1 /* work in standard 4 bit mode */ | |
| 96 | #define PPA_PS2 2 /* PS/2 byte mode */ | |
| 97 | #define PPA_EPP_8 3 /* EPP mode, 8 bit */ | |
| 98 | #define PPA_EPP_16 4 /* EPP mode, 16 bit */ | |
| 99 | #define PPA_EPP_32 5 /* EPP mode, 32 bit */ | |
| 100 | #define PPA_UNKNOWN 6 /* Just in case... */ | |
| 101 | ||
| 102 | static char *PPA_MODE_STRING[] = | |
| 103 | { | |
| 104 | "Autodetect", | |
| 105 | "SPP", | |
| 106 | "PS/2", | |
| 107 | "EPP 8 bit", | |
| 108 | "EPP 16 bit", | |
| 109 | #ifdef CONFIG_SCSI_IZIP_EPP16 | |
| 110 | "EPP 16 bit", | |
| 111 | #else | |
| 112 | "EPP 32 bit", | |
| 113 | #endif | |
| 114 | "Unknown"}; | |
| 115 | ||
| 116 | /* other options */ | |
| 117 | #define PPA_BURST_SIZE 512 /* data burst size */ | |
| 118 | #define PPA_SELECT_TMO 5000 /* how long to wait for target ? */ | |
| 119 | #define PPA_SPIN_TMO 50000 /* ppa_wait loop limiter */ | |
| 120 | #define PPA_RECON_TMO 500 /* scsi reconnection loop limiter */ | |
| 121 | #define PPA_DEBUG 0 /* debugging option */ | |
| 122 | #define IN_EPP_MODE(x) (x == PPA_EPP_8 || x == PPA_EPP_16 || x == PPA_EPP_32) | |
| 123 | ||
| 124 | /* args to ppa_connect */ | |
| 125 | #define CONNECT_EPP_MAYBE 1 | |
| 126 | #define CONNECT_NORMAL 0 | |
| 127 | ||
| 128 | #define r_dtr(x) (unsigned char)inb((x)) | |
| 129 | #define r_str(x) (unsigned char)inb((x)+1) | |
| 130 | #define r_ctr(x) (unsigned char)inb((x)+2) | |
| 131 | #define r_epp(x) (unsigned char)inb((x)+4) | |
| 132 | #define r_fifo(x) (unsigned char)inb((x)) /* x must be base_hi */ | |
| 133 | /* On PCI is base+0x400 != base_hi */ | |
| 134 | #define r_ecr(x) (unsigned char)inb((x)+0x2) /* x must be base_hi */ | |
| 135 | ||
| 136 | #define w_dtr(x,y) outb(y, (x)) | |
| 137 | #define w_str(x,y) outb(y, (x)+1) | |
| 138 | #define w_epp(x,y) outb(y, (x)+4) | |
| 139 | #define w_fifo(x,y) outb(y, (x)) /* x must be base_hi */ | |
| 140 | #define w_ecr(x,y) outb(y, (x)+0x2)/* x must be base_hi */ | |
| 141 | ||
| 142 | #ifdef CONFIG_SCSI_IZIP_SLOW_CTR | |
| 143 | #define w_ctr(x,y) outb_p(y, (x)+2) | |
| 144 | #else | |
| 145 | #define w_ctr(x,y) outb(y, (x)+2) | |
| 146 | #endif | |
| 147 | ||
| 148 | static int ppa_engine(ppa_struct *, struct scsi_cmnd *); | |
| 149 | ||
| 150 | #endif /* _PPA_H */ |