diff options
Diffstat (limited to 'drivers/block/paride/bpck6.c')
| -rw-r--r-- | drivers/block/paride/bpck6.c | 282 |
1 files changed, 282 insertions, 0 deletions
diff --git a/drivers/block/paride/bpck6.c b/drivers/block/paride/bpck6.c new file mode 100644 index 00000000000..08d858ad64d --- /dev/null +++ b/drivers/block/paride/bpck6.c @@ -0,0 +1,282 @@ +/* + backpack.c (c) 2001 Micro Solutions Inc. + Released under the terms of the GNU General Public license + + backpack.c is a low-level protocol driver for the Micro Solutions + "BACKPACK" parallel port IDE adapter + (Works on Series 6 drives) + + Written by: Ken Hahn (linux-dev@micro-solutions.com) + Clive Turvey (linux-dev@micro-solutions.com) + +*/ + +/* + This is Ken's linux wrapper for the PPC library + Version 1.0.0 is the backpack driver for which source is not available + Version 2.0.0 is the first to have source released + Version 2.0.1 is the "Cox-ified" source code + Version 2.0.2 - fixed version string usage, and made ppc functions static +*/ + + +/* PARAMETERS */ +static int verbose; /* set this to 1 to see debugging messages and whatnot */ + +#define BACKPACK_VERSION "2.0.2" + +#include <linux/module.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/slab.h> +#include <linux/types.h> +#include <asm/io.h> + +#if defined(CONFIG_PARPORT_MODULE)||defined(CONFIG_PARPORT) +#include <linux/parport.h> +#endif + +#include "ppc6lnx.c" +#include "paride.h" + + + +#define PPCSTRUCT(pi) ((Interface *)(pi->private)) + +/****************************************************************/ +/* + ATAPI CDROM DRIVE REGISTERS +*/ +#define ATAPI_DATA 0 /* data port */ +#define ATAPI_ERROR 1 /* error register (read) */ +#define ATAPI_FEATURES 1 /* feature register (write) */ +#define ATAPI_INT_REASON 2 /* interrupt reason register */ +#define ATAPI_COUNT_LOW 4 /* byte count register (low) */ +#define ATAPI_COUNT_HIGH 5 /* byte count register (high) */ +#define ATAPI_DRIVE_SEL 6 /* drive select register */ +#define ATAPI_STATUS 7 /* status port (read) */ +#define ATAPI_COMMAND 7 /* command port (write) */ +#define ATAPI_ALT_STATUS 0x0e /* alternate status reg (read) */ +#define ATAPI_DEVICE_CONTROL 0x0e /* device control (write) */ +/****************************************************************/ + +static int bpck6_read_regr(PIA *pi, int cont, int reg) +{ + unsigned int out; + + /* check for bad settings */ + if (reg<0 || reg>7 || cont<0 || cont>2) + { + return(-1); + } + out=ppc6_rd_port(PPCSTRUCT(pi),cont?reg|8:reg); + return(out); +} + +static void bpck6_write_regr(PIA *pi, int cont, int reg, int val) +{ + /* check for bad settings */ + if (reg>=0 && reg<=7 && cont>=0 && cont<=1) + { + ppc6_wr_port(PPCSTRUCT(pi),cont?reg|8:reg,(u8)val); + } +} + +static void bpck6_write_block( PIA *pi, char * buf, int len ) +{ + ppc6_wr_port16_blk(PPCSTRUCT(pi),ATAPI_DATA,buf,(u32)len>>1); +} + +static void bpck6_read_block( PIA *pi, char * buf, int len ) +{ + ppc6_rd_port16_blk(PPCSTRUCT(pi),ATAPI_DATA,buf,(u32)len>>1); +} + +static void bpck6_connect ( PIA *pi ) +{ + if(verbose) + { + printk(KERN_DEBUG "connect\n"); + } + + if(pi->mode >=2) + { + PPCSTRUCT(pi)->mode=4+pi->mode-2; + } + else if(pi->mode==1) + { + PPCSTRUCT(pi)->mode=3; + } + else + { + PPCSTRUCT(pi)->mode=1; + } + + ppc6_open(PPCSTRUCT(pi)); + ppc6_wr_extout(PPCSTRUCT(pi),0x3); +} + +static void bpck6_disconnect ( PIA *pi ) +{ + if(verbose) + { + printk("disconnect\n"); + } + ppc6_wr_extout(PPCSTRUCT(pi),0x0); + ppc6_close(PPCSTRUCT(pi)); +} + +static int bpck6_test_port ( PIA *pi ) /* check for 8-bit port */ +{ + if(verbose) + { + printk(KERN_DEBUG "PARPORT indicates modes=%x for lp=0x%lx\n", + ((struct pardevice*)(pi->pardev))->port->modes, + ((struct pardevice *)(pi->pardev))->port->base); + } + + /*copy over duplicate stuff.. initialize state info*/ + PPCSTRUCT(pi)->ppc_id=pi->unit; + PPCSTRUCT(pi)->lpt_addr=pi->port; + +#ifdef CONFIG_PARPORT_PC_MODULE +#define CONFIG_PARPORT_PC +#endif + +#ifdef CONFIG_PARPORT_PC + /* look at the parport device to see if what modes we can use */ + if(((struct pardevice *)(pi->pardev))->port->modes & + (PARPORT_MODE_EPP) + ) + { + return 5; /* Can do EPP*/ + } + else if(((struct pardevice *)(pi->pardev))->port->modes & + (PARPORT_MODE_TRISTATE) + ) + { + return 2; + } + else /*Just flat SPP*/ + { + return 1; + } +#else + /* there is no way of knowing what kind of port we have + default to the highest mode possible */ + return 5; +#endif +} + +static int bpck6_probe_unit ( PIA *pi ) +{ + int out; + + if(verbose) + { + printk(KERN_DEBUG "PROBE UNIT %x on port:%x\n",pi->unit,pi->port); + } + + /*SET PPC UNIT NUMBER*/ + PPCSTRUCT(pi)->ppc_id=pi->unit; + + /*LOWER DOWN TO UNIDIRECTIONAL*/ + PPCSTRUCT(pi)->mode=1; + + out=ppc6_open(PPCSTRUCT(pi)); + + if(verbose) + { + printk(KERN_DEBUG "ppc_open returned %2x\n",out); + } + + if(out) + { + ppc6_close(PPCSTRUCT(pi)); + if(verbose) + { + printk(KERN_DEBUG "leaving probe\n"); + } + return(1); + } + else + { + if(verbose) + { + printk(KERN_DEBUG "Failed open\n"); + } + return(0); + } +} + +static void bpck6_log_adapter( PIA *pi, char * scratch, int verbose ) +{ + char *mode_string[5]= + {"4-bit","8-bit","EPP-8","EPP-16","EPP-32"}; + + printk("%s: BACKPACK Protocol Driver V"BACKPACK_VERSION"\n",pi->device); + printk("%s: Copyright 2001 by Micro Solutions, Inc., DeKalb IL.\n",pi->device); + printk("%s: BACKPACK %s, Micro Solutions BACKPACK Drive at 0x%x\n", + pi->device,BACKPACK_VERSION,pi->port); + printk("%s: Unit: %d Mode:%d (%s) Delay %d\n",pi->device, + pi->unit,pi->mode,mode_string[pi->mode],pi->delay); +} + +static int bpck6_init_proto(PIA *pi) +{ + Interface *p = kmalloc(sizeof(Interface), GFP_KERNEL); + + if (p) { + memset(p, 0, sizeof(Interface)); + pi->private = (unsigned long)p; + return 0; + } + + printk(KERN_ERR "%s: ERROR COULDN'T ALLOCATE MEMORY\n", pi->device); + return -1; +} + +static void bpck6_release_proto(PIA *pi) +{ + kfree((void *)(pi->private)); +} + +static struct pi_protocol bpck6 = { + .owner = THIS_MODULE, + .name = "bpck6", + .max_mode = 5, + .epp_first = 2, /* 2-5 use epp (need 8 ports) */ + .max_units = 255, + .write_regr = bpck6_write_regr, + .read_regr = bpck6_read_regr, + .write_block = bpck6_write_block, + .read_block = bpck6_read_block, + .connect = bpck6_connect, + .disconnect = bpck6_disconnect, + .test_port = bpck6_test_port, + .probe_unit = bpck6_probe_unit, + .log_adapter = bpck6_log_adapter, + .init_proto = bpck6_init_proto, + .release_proto = bpck6_release_proto, +}; + +static int __init bpck6_init(void) +{ + printk(KERN_INFO "bpck6: BACKPACK Protocol Driver V"BACKPACK_VERSION"\n"); + printk(KERN_INFO "bpck6: Copyright 2001 by Micro Solutions, Inc., DeKalb IL. USA\n"); + if(verbose) + printk(KERN_DEBUG "bpck6: verbose debug enabled.\n"); + return pi_register(&bpck6) - 1; +} + +static void __exit bpck6_exit(void) +{ + pi_unregister(&bpck6); +} + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Micro Solutions Inc."); +MODULE_DESCRIPTION("BACKPACK Protocol module, compatible with PARIDE"); +module_param(verbose, bool, 0644); +module_init(bpck6_init) +module_exit(bpck6_exit) |