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linux/drivers/block/paride/ppc6lnx.c
Linus Torvalds 1da177e4c3 Linux-2.6.12-rc2 
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
2005-04-16 15:20:36 -07:00

727 lines
14 KiB
C
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/*
ppc6lnx.c (c) 2001 Micro Solutions Inc.
Released under the terms of the GNU General Public license
ppc6lnx.c is a par of the protocol driver for the Micro Solutions
"BACKPACK" parallel port IDE adapter
(Works on Series 6 drives)
*/
//***************************************************************************
// PPC 6 Code in C sanitized for LINUX
// Original x86 ASM by Ron, Converted to C by Clive
//***************************************************************************
#define port_stb 1
#define port_afd 2
#define cmd_stb port_afd
#define port_init 4
#define data_stb port_init
#define port_sel 8
#define port_int 16
#define port_dir 0x20
#define ECR_EPP 0x80
#define ECR_BI 0x20
//***************************************************************************
// 60772 Commands
#define ACCESS_REG 0x00
#define ACCESS_PORT 0x40
#define ACCESS_READ 0x00
#define ACCESS_WRITE 0x20
// 60772 Command Prefix
#define CMD_PREFIX_SET 0xe0 // Special command that modifies the next command's operation
#define CMD_PREFIX_RESET 0xc0 // Resets current cmd modifier reg bits
#define PREFIX_IO16 0x01 // perform 16-bit wide I/O
#define PREFIX_FASTWR 0x04 // enable PPC mode fast-write
#define PREFIX_BLK 0x08 // enable block transfer mode
// 60772 Registers
#define REG_STATUS 0x00 // status register
#define STATUS_IRQA 0x01 // Peripheral IRQA line
#define STATUS_EEPROM_DO 0x40 // Serial EEPROM data bit
#define REG_VERSION 0x01 // PPC version register (read)
#define REG_HWCFG 0x02 // Hardware Config register
#define REG_RAMSIZE 0x03 // Size of RAM Buffer
#define RAMSIZE_128K 0x02
#define REG_EEPROM 0x06 // EEPROM control register
#define EEPROM_SK 0x01 // eeprom SK bit
#define EEPROM_DI 0x02 // eeprom DI bit
#define EEPROM_CS 0x04 // eeprom CS bit
#define EEPROM_EN 0x08 // eeprom output enable
#define REG_BLKSIZE 0x08 // Block transfer len (24 bit)
//***************************************************************************
typedef struct ppc_storage {
u16 lpt_addr; // LPT base address
u8 ppc_id;
u8 mode; // operating mode
// 0 = PPC Uni SW
// 1 = PPC Uni FW
// 2 = PPC Bi SW
// 3 = PPC Bi FW
// 4 = EPP Byte
// 5 = EPP Word
// 6 = EPP Dword
u8 ppc_flags;
u8 org_data; // original LPT data port contents
u8 org_ctrl; // original LPT control port contents
u8 cur_ctrl; // current control port contents
} Interface;
//***************************************************************************
// ppc_flags
#define fifo_wait 0x10
//***************************************************************************
// DONT CHANGE THESE LEST YOU BREAK EVERYTHING - BIT FIELD DEPENDENCIES
#define PPCMODE_UNI_SW 0
#define PPCMODE_UNI_FW 1
#define PPCMODE_BI_SW 2
#define PPCMODE_BI_FW 3
#define PPCMODE_EPP_BYTE 4
#define PPCMODE_EPP_WORD 5
#define PPCMODE_EPP_DWORD 6
//***************************************************************************
static int ppc6_select(Interface *ppc);
static void ppc6_deselect(Interface *ppc);
static void ppc6_send_cmd(Interface *ppc, u8 cmd);
static void ppc6_wr_data_byte(Interface *ppc, u8 data);
static u8 ppc6_rd_data_byte(Interface *ppc);
static u8 ppc6_rd_port(Interface *ppc, u8 port);
static void ppc6_wr_port(Interface *ppc, u8 port, u8 data);
static void ppc6_rd_data_blk(Interface *ppc, u8 *data, long count);
static void ppc6_wait_for_fifo(Interface *ppc);
static void ppc6_wr_data_blk(Interface *ppc, u8 *data, long count);
static void ppc6_rd_port16_blk(Interface *ppc, u8 port, u8 *data, long length);
static void ppc6_wr_port16_blk(Interface *ppc, u8 port, u8 *data, long length);
static void ppc6_wr_extout(Interface *ppc, u8 regdata);
static int ppc6_open(Interface *ppc);
static void ppc6_close(Interface *ppc);
//***************************************************************************
static int ppc6_select(Interface *ppc)
{
u8 i, j, k;
i = inb(ppc->lpt_addr + 1);
if (i & 1)
outb(i, ppc->lpt_addr + 1);
ppc->org_data = inb(ppc->lpt_addr);
ppc->org_ctrl = inb(ppc->lpt_addr + 2) & 0x5F; // readback ctrl
ppc->cur_ctrl = ppc->org_ctrl;
ppc->cur_ctrl |= port_sel;
outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
if (ppc->org_data == 'b')
outb('x', ppc->lpt_addr);
outb('b', ppc->lpt_addr);
outb('p', ppc->lpt_addr);
outb(ppc->ppc_id, ppc->lpt_addr);
outb(~ppc->ppc_id,ppc->lpt_addr);
ppc->cur_ctrl &= ~port_sel;
outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
ppc->cur_ctrl = (ppc->cur_ctrl & port_int) | port_init;
outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
i = ppc->mode & 0x0C;
if (i == 0)
i = (ppc->mode & 2) | 1;
outb(i, ppc->lpt_addr);
ppc->cur_ctrl |= port_sel;
outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
// DELAY
ppc->cur_ctrl |= port_afd;
outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
j = ((i & 0x08) << 4) | ((i & 0x07) << 3);
k = inb(ppc->lpt_addr + 1) & 0xB8;
if (j == k)
{
ppc->cur_ctrl &= ~port_afd;
outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
k = (inb(ppc->lpt_addr + 1) & 0xB8) ^ 0xB8;
if (j == k)
{
if (i & 4) // EPP
ppc->cur_ctrl &= ~(port_sel | port_init);
else // PPC/ECP
ppc->cur_ctrl &= ~port_sel;
outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
return(1);
}
}
outb(ppc->org_ctrl, ppc->lpt_addr + 2);
outb(ppc->org_data, ppc->lpt_addr);
return(0); // FAIL
}
//***************************************************************************
static void ppc6_deselect(Interface *ppc)
{
if (ppc->mode & 4) // EPP
ppc->cur_ctrl |= port_init;
else // PPC/ECP
ppc->cur_ctrl |= port_sel;
outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
outb(ppc->org_data, ppc->lpt_addr);
outb((ppc->org_ctrl | port_sel), ppc->lpt_addr + 2);
outb(ppc->org_ctrl, ppc->lpt_addr + 2);
}
//***************************************************************************
static void ppc6_send_cmd(Interface *ppc, u8 cmd)
{
switch(ppc->mode)
{
case PPCMODE_UNI_SW :
case PPCMODE_UNI_FW :
case PPCMODE_BI_SW :
case PPCMODE_BI_FW :
{
outb(cmd, ppc->lpt_addr);
ppc->cur_ctrl ^= cmd_stb;
outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
break;
}
case PPCMODE_EPP_BYTE :
case PPCMODE_EPP_WORD :
case PPCMODE_EPP_DWORD :
{
outb(cmd, ppc->lpt_addr + 3);
break;
}
}
}
//***************************************************************************
static void ppc6_wr_data_byte(Interface *ppc, u8 data)
{
switch(ppc->mode)
{
case PPCMODE_UNI_SW :
case PPCMODE_UNI_FW :
case PPCMODE_BI_SW :
case PPCMODE_BI_FW :
{
outb(data, ppc->lpt_addr);
ppc->cur_ctrl ^= data_stb;
outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
break;
}
case PPCMODE_EPP_BYTE :
case PPCMODE_EPP_WORD :
case PPCMODE_EPP_DWORD :
{
outb(data, ppc->lpt_addr + 4);
break;
}
}
}
//***************************************************************************
static u8 ppc6_rd_data_byte(Interface *ppc)
{
u8 data = 0;
switch(ppc->mode)
{
case PPCMODE_UNI_SW :
case PPCMODE_UNI_FW :
{
ppc->cur_ctrl = (ppc->cur_ctrl & ~port_stb) ^ data_stb;
outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
// DELAY
data = inb(ppc->lpt_addr + 1);
data = ((data & 0x80) >> 1) | ((data & 0x38) >> 3);
ppc->cur_ctrl |= port_stb;
outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
// DELAY
data |= inb(ppc->lpt_addr + 1) & 0xB8;
break;
}
case PPCMODE_BI_SW :
case PPCMODE_BI_FW :
{
ppc->cur_ctrl |= port_dir;
outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
ppc->cur_ctrl = (ppc->cur_ctrl | port_stb) ^ data_stb;
outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
data = inb(ppc->lpt_addr);
ppc->cur_ctrl &= ~port_stb;
outb(ppc->cur_ctrl,ppc->lpt_addr + 2);
ppc->cur_ctrl &= ~port_dir;
outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
break;
}
case PPCMODE_EPP_BYTE :
case PPCMODE_EPP_WORD :
case PPCMODE_EPP_DWORD :
{
outb((ppc->cur_ctrl | port_dir),ppc->lpt_addr + 2);
data = inb(ppc->lpt_addr + 4);
outb(ppc->cur_ctrl,ppc->lpt_addr + 2);
break;
}
}
return(data);
}
//***************************************************************************
static u8 ppc6_rd_port(Interface *ppc, u8 port)
{
ppc6_send_cmd(ppc,(u8)(port | ACCESS_PORT | ACCESS_READ));
return(ppc6_rd_data_byte(ppc));
}
//***************************************************************************
static void ppc6_wr_port(Interface *ppc, u8 port, u8 data)
{
ppc6_send_cmd(ppc,(u8)(port | ACCESS_PORT | ACCESS_WRITE));
ppc6_wr_data_byte(ppc, data);
}
//***************************************************************************
static void ppc6_rd_data_blk(Interface *ppc, u8 *data, long count)
{
switch(ppc->mode)
{
case PPCMODE_UNI_SW :
case PPCMODE_UNI_FW :
{
while(count)
{
u8 d;
ppc->cur_ctrl = (ppc->cur_ctrl & ~port_stb) ^ data_stb;
outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
// DELAY
d = inb(ppc->lpt_addr + 1);
d = ((d & 0x80) >> 1) | ((d & 0x38) >> 3);
ppc->cur_ctrl |= port_stb;
outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
// DELAY
d |= inb(ppc->lpt_addr + 1) & 0xB8;
*data++ = d;
count--;
}
break;
}
case PPCMODE_BI_SW :
case PPCMODE_BI_FW :
{
ppc->cur_ctrl |= port_dir;
outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
ppc->cur_ctrl |= port_stb;
while(count)
{
ppc->cur_ctrl ^= data_stb;
outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
*data++ = inb(ppc->lpt_addr);
count--;
}
ppc->cur_ctrl &= ~port_stb;
outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
ppc->cur_ctrl &= ~port_dir;
outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
break;
}
case PPCMODE_EPP_BYTE :
{
outb((ppc->cur_ctrl | port_dir), ppc->lpt_addr + 2);
// DELAY
while(count)
{
*data++ = inb(ppc->lpt_addr + 4);
count--;
}
outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
break;
}
case PPCMODE_EPP_WORD :
{
outb((ppc->cur_ctrl | port_dir), ppc->lpt_addr + 2);
// DELAY
while(count > 1)
{
*((u16 *)data) = inw(ppc->lpt_addr + 4);
data += 2;
count -= 2;
}
while(count)
{
*data++ = inb(ppc->lpt_addr + 4);
count--;
}
outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
break;
}
case PPCMODE_EPP_DWORD :
{
outb((ppc->cur_ctrl | port_dir),ppc->lpt_addr + 2);
// DELAY
while(count > 3)
{
*((u32 *)data) = inl(ppc->lpt_addr + 4);
data += 4;
count -= 4;
}
while(count)
{
*data++ = inb(ppc->lpt_addr + 4);
count--;
}
outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
break;
}
}
}
//***************************************************************************
static void ppc6_wait_for_fifo(Interface *ppc)
{
int i;
if (ppc->ppc_flags & fifo_wait)
{
for(i=0; i<20; i++)
inb(ppc->lpt_addr + 1);
}
}
//***************************************************************************
static void ppc6_wr_data_blk(Interface *ppc, u8 *data, long count)
{
switch(ppc->mode)
{
case PPCMODE_UNI_SW :
case PPCMODE_BI_SW :
{
while(count--)
{
outb(*data++, ppc->lpt_addr);
ppc->cur_ctrl ^= data_stb;
outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
}
break;
}
case PPCMODE_UNI_FW :
case PPCMODE_BI_FW :
{
u8 this, last;
ppc6_send_cmd(ppc,(CMD_PREFIX_SET | PREFIX_FASTWR));
ppc->cur_ctrl |= port_stb;
outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
last = *data;
outb(last, ppc->lpt_addr);
while(count)
{
this = *data++;
count--;
if (this == last)
{
ppc->cur_ctrl ^= data_stb;
outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
}
else
{
outb(this, ppc->lpt_addr);
last = this;
}
}
ppc->cur_ctrl &= ~port_stb;
outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
ppc6_send_cmd(ppc,(CMD_PREFIX_RESET | PREFIX_FASTWR));
break;
}
case PPCMODE_EPP_BYTE :
{
while(count)
{
outb(*data++,ppc->lpt_addr + 4);
count--;
}
ppc6_wait_for_fifo(ppc);
break;
}
case PPCMODE_EPP_WORD :
{
while(count > 1)
{
outw(*((u16 *)data),ppc->lpt_addr + 4);
data += 2;
count -= 2;
}
while(count)
{
outb(*data++,ppc->lpt_addr + 4);
count--;
}
ppc6_wait_for_fifo(ppc);
break;
}
case PPCMODE_EPP_DWORD :
{
while(count > 3)
{
outl(*((u32 *)data),ppc->lpt_addr + 4);
data += 4;
count -= 4;
}
while(count)
{
outb(*data++,ppc->lpt_addr + 4);
count--;
}
ppc6_wait_for_fifo(ppc);
break;
}
}
}
//***************************************************************************
static void ppc6_rd_port16_blk(Interface *ppc, u8 port, u8 *data, long length)
{
length = length << 1;
ppc6_send_cmd(ppc, (REG_BLKSIZE | ACCESS_REG | ACCESS_WRITE));
ppc6_wr_data_byte(ppc,(u8)length);
ppc6_wr_data_byte(ppc,(u8)(length >> 8));
ppc6_wr_data_byte(ppc,0);
ppc6_send_cmd(ppc, (CMD_PREFIX_SET | PREFIX_IO16 | PREFIX_BLK));
ppc6_send_cmd(ppc, (u8)(port | ACCESS_PORT | ACCESS_READ));
ppc6_rd_data_blk(ppc, data, length);
ppc6_send_cmd(ppc, (CMD_PREFIX_RESET | PREFIX_IO16 | PREFIX_BLK));
}
//***************************************************************************
static void ppc6_wr_port16_blk(Interface *ppc, u8 port, u8 *data, long length)
{
length = length << 1;
ppc6_send_cmd(ppc, (REG_BLKSIZE | ACCESS_REG | ACCESS_WRITE));
ppc6_wr_data_byte(ppc,(u8)length);
ppc6_wr_data_byte(ppc,(u8)(length >> 8));
ppc6_wr_data_byte(ppc,0);
ppc6_send_cmd(ppc, (CMD_PREFIX_SET | PREFIX_IO16 | PREFIX_BLK));
ppc6_send_cmd(ppc, (u8)(port | ACCESS_PORT | ACCESS_WRITE));
ppc6_wr_data_blk(ppc, data, length);
ppc6_send_cmd(ppc, (CMD_PREFIX_RESET | PREFIX_IO16 | PREFIX_BLK));
}
//***************************************************************************
static void ppc6_wr_extout(Interface *ppc, u8 regdata)
{
ppc6_send_cmd(ppc,(REG_VERSION | ACCESS_REG | ACCESS_WRITE));
ppc6_wr_data_byte(ppc, (u8)((regdata & 0x03) << 6));
}
//***************************************************************************
static int ppc6_open(Interface *ppc)
{
int ret;
ret = ppc6_select(ppc);
if (ret == 0)
return(ret);
ppc->ppc_flags &= ~fifo_wait;
ppc6_send_cmd(ppc, (ACCESS_REG | ACCESS_WRITE | REG_RAMSIZE));
ppc6_wr_data_byte(ppc, RAMSIZE_128K);
ppc6_send_cmd(ppc, (ACCESS_REG | ACCESS_READ | REG_VERSION));
if ((ppc6_rd_data_byte(ppc) & 0x3F) == 0x0C)
ppc->ppc_flags |= fifo_wait;
return(ret);
}
//***************************************************************************
static void ppc6_close(Interface *ppc)
{
ppc6_deselect(ppc);
}
//***************************************************************************
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