ppc6lnx.c
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上传日期:2013-02-24
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文件大小:14k
- /*
- 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
- } PPC;
- //***************************************************************************
- // 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(PPC *ppc);
- static void ppc6_deselect(PPC *ppc);
- static void ppc6_send_cmd(PPC *ppc, u8 cmd);
- static void ppc6_wr_data_byte(PPC *ppc, u8 data);
- static u8 ppc6_rd_data_byte(PPC *ppc);
- static u8 ppc6_rd_port(PPC *ppc, u8 port);
- static void ppc6_wr_port(PPC *ppc, u8 port, u8 data);
- static void ppc6_rd_data_blk(PPC *ppc, u8 *data, long count);
- static void ppc6_wait_for_fifo(PPC *ppc);
- static void ppc6_wr_data_blk(PPC *ppc, u8 *data, long count);
- static void ppc6_rd_port16_blk(PPC *ppc, u8 port, u8 *data, long length);
- static void ppc6_wr_port16_blk(PPC *ppc, u8 port, u8 *data, long length);
- static void ppc6_wr_extout(PPC *ppc, u8 regdata);
- static int ppc6_open(PPC *ppc);
- static void ppc6_close(PPC *ppc);
- //***************************************************************************
- static int ppc6_select(PPC *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(PPC *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(PPC *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(PPC *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(PPC *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(PPC *ppc, u8 port)
- {
- ppc6_send_cmd(ppc,(u8)(port | ACCESS_PORT | ACCESS_READ));
- return(ppc6_rd_data_byte(ppc));
- }
- //***************************************************************************
- static void ppc6_wr_port(PPC *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(PPC *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(PPC *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(PPC *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(PPC *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(PPC *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(PPC *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(PPC *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(PPC *ppc)
- {
- ppc6_deselect(ppc);
- }
- //***************************************************************************
- MODULE_LICENSE("GPL");