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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [drivers/] [block/] [paride/] [ppc6lnx.c] - Rev 1765
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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 } PPC_STORAGE; //*************************************************************************** // 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_STORAGE *ppc); static void ppc6_deselect(PPC_STORAGE *ppc); static void ppc6_send_cmd(PPC_STORAGE *ppc, u8 cmd); static void ppc6_wr_data_byte(PPC_STORAGE *ppc, u8 data); static u8 ppc6_rd_data_byte(PPC_STORAGE *ppc); static u8 ppc6_rd_port(PPC_STORAGE *ppc, u8 port); static void ppc6_wr_port(PPC_STORAGE *ppc, u8 port, u8 data); static void ppc6_rd_data_blk(PPC_STORAGE *ppc, u8 *data, long count); static void ppc6_wait_for_fifo(PPC_STORAGE *ppc); static void ppc6_wr_data_blk(PPC_STORAGE *ppc, u8 *data, long count); static void ppc6_rd_port16_blk(PPC_STORAGE *ppc, u8 port, u8 *data, long length); static void ppc6_wr_port16_blk(PPC_STORAGE *ppc, u8 port, u8 *data, long length); static void ppc6_wr_extout(PPC_STORAGE *ppc, u8 regdata); static int ppc6_open(PPC_STORAGE *ppc); static void ppc6_close(PPC_STORAGE *ppc); //*************************************************************************** static int ppc6_select(PPC_STORAGE *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_STORAGE *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_STORAGE *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_STORAGE *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_STORAGE *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_STORAGE *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_STORAGE *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_STORAGE *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_STORAGE *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_STORAGE *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_STORAGE *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_STORAGE *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_STORAGE *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_STORAGE *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_STORAGE *ppc) { ppc6_deselect(ppc); } //*************************************************************************** MODULE_LICENSE("GPL");