mirror of
https://github.com/torvalds/linux.git
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1da177e4c3
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!
727 lines
14 KiB
C
727 lines
14 KiB
C
/*
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ppc6lnx.c (c) 2001 Micro Solutions Inc.
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Released under the terms of the GNU General Public license
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ppc6lnx.c is a par of the protocol driver for the Micro Solutions
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"BACKPACK" parallel port IDE adapter
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(Works on Series 6 drives)
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*/
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//***************************************************************************
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// PPC 6 Code in C sanitized for LINUX
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// Original x86 ASM by Ron, Converted to C by Clive
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//***************************************************************************
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#define port_stb 1
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#define port_afd 2
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#define cmd_stb port_afd
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#define port_init 4
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#define data_stb port_init
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#define port_sel 8
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#define port_int 16
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#define port_dir 0x20
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#define ECR_EPP 0x80
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#define ECR_BI 0x20
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//***************************************************************************
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// 60772 Commands
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#define ACCESS_REG 0x00
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#define ACCESS_PORT 0x40
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#define ACCESS_READ 0x00
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#define ACCESS_WRITE 0x20
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// 60772 Command Prefix
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#define CMD_PREFIX_SET 0xe0 // Special command that modifies the next command's operation
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#define CMD_PREFIX_RESET 0xc0 // Resets current cmd modifier reg bits
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#define PREFIX_IO16 0x01 // perform 16-bit wide I/O
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#define PREFIX_FASTWR 0x04 // enable PPC mode fast-write
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#define PREFIX_BLK 0x08 // enable block transfer mode
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// 60772 Registers
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#define REG_STATUS 0x00 // status register
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#define STATUS_IRQA 0x01 // Peripheral IRQA line
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#define STATUS_EEPROM_DO 0x40 // Serial EEPROM data bit
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#define REG_VERSION 0x01 // PPC version register (read)
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#define REG_HWCFG 0x02 // Hardware Config register
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#define REG_RAMSIZE 0x03 // Size of RAM Buffer
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#define RAMSIZE_128K 0x02
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#define REG_EEPROM 0x06 // EEPROM control register
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#define EEPROM_SK 0x01 // eeprom SK bit
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#define EEPROM_DI 0x02 // eeprom DI bit
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#define EEPROM_CS 0x04 // eeprom CS bit
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#define EEPROM_EN 0x08 // eeprom output enable
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#define REG_BLKSIZE 0x08 // Block transfer len (24 bit)
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//***************************************************************************
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typedef struct ppc_storage {
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u16 lpt_addr; // LPT base address
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u8 ppc_id;
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u8 mode; // operating mode
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// 0 = PPC Uni SW
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// 1 = PPC Uni FW
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// 2 = PPC Bi SW
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// 3 = PPC Bi FW
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// 4 = EPP Byte
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// 5 = EPP Word
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// 6 = EPP Dword
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u8 ppc_flags;
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u8 org_data; // original LPT data port contents
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u8 org_ctrl; // original LPT control port contents
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u8 cur_ctrl; // current control port contents
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} Interface;
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//***************************************************************************
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// ppc_flags
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#define fifo_wait 0x10
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//***************************************************************************
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// DONT CHANGE THESE LEST YOU BREAK EVERYTHING - BIT FIELD DEPENDENCIES
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#define PPCMODE_UNI_SW 0
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#define PPCMODE_UNI_FW 1
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#define PPCMODE_BI_SW 2
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#define PPCMODE_BI_FW 3
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#define PPCMODE_EPP_BYTE 4
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#define PPCMODE_EPP_WORD 5
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#define PPCMODE_EPP_DWORD 6
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//***************************************************************************
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static int ppc6_select(Interface *ppc);
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static void ppc6_deselect(Interface *ppc);
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static void ppc6_send_cmd(Interface *ppc, u8 cmd);
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static void ppc6_wr_data_byte(Interface *ppc, u8 data);
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static u8 ppc6_rd_data_byte(Interface *ppc);
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static u8 ppc6_rd_port(Interface *ppc, u8 port);
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static void ppc6_wr_port(Interface *ppc, u8 port, u8 data);
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static void ppc6_rd_data_blk(Interface *ppc, u8 *data, long count);
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static void ppc6_wait_for_fifo(Interface *ppc);
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static void ppc6_wr_data_blk(Interface *ppc, u8 *data, long count);
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static void ppc6_rd_port16_blk(Interface *ppc, u8 port, u8 *data, long length);
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static void ppc6_wr_port16_blk(Interface *ppc, u8 port, u8 *data, long length);
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static void ppc6_wr_extout(Interface *ppc, u8 regdata);
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static int ppc6_open(Interface *ppc);
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static void ppc6_close(Interface *ppc);
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//***************************************************************************
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static int ppc6_select(Interface *ppc)
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{
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u8 i, j, k;
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i = inb(ppc->lpt_addr + 1);
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if (i & 1)
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outb(i, ppc->lpt_addr + 1);
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ppc->org_data = inb(ppc->lpt_addr);
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ppc->org_ctrl = inb(ppc->lpt_addr + 2) & 0x5F; // readback ctrl
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ppc->cur_ctrl = ppc->org_ctrl;
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ppc->cur_ctrl |= port_sel;
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outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
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if (ppc->org_data == 'b')
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outb('x', ppc->lpt_addr);
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outb('b', ppc->lpt_addr);
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outb('p', ppc->lpt_addr);
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outb(ppc->ppc_id, ppc->lpt_addr);
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outb(~ppc->ppc_id,ppc->lpt_addr);
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ppc->cur_ctrl &= ~port_sel;
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outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
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ppc->cur_ctrl = (ppc->cur_ctrl & port_int) | port_init;
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outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
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i = ppc->mode & 0x0C;
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if (i == 0)
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i = (ppc->mode & 2) | 1;
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outb(i, ppc->lpt_addr);
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ppc->cur_ctrl |= port_sel;
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outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
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// DELAY
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ppc->cur_ctrl |= port_afd;
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outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
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j = ((i & 0x08) << 4) | ((i & 0x07) << 3);
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k = inb(ppc->lpt_addr + 1) & 0xB8;
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if (j == k)
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{
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ppc->cur_ctrl &= ~port_afd;
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outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
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k = (inb(ppc->lpt_addr + 1) & 0xB8) ^ 0xB8;
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if (j == k)
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{
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if (i & 4) // EPP
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ppc->cur_ctrl &= ~(port_sel | port_init);
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else // PPC/ECP
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ppc->cur_ctrl &= ~port_sel;
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outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
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return(1);
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}
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}
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outb(ppc->org_ctrl, ppc->lpt_addr + 2);
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outb(ppc->org_data, ppc->lpt_addr);
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return(0); // FAIL
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}
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//***************************************************************************
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static void ppc6_deselect(Interface *ppc)
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{
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if (ppc->mode & 4) // EPP
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ppc->cur_ctrl |= port_init;
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else // PPC/ECP
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ppc->cur_ctrl |= port_sel;
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outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
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outb(ppc->org_data, ppc->lpt_addr);
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outb((ppc->org_ctrl | port_sel), ppc->lpt_addr + 2);
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outb(ppc->org_ctrl, ppc->lpt_addr + 2);
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}
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//***************************************************************************
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static void ppc6_send_cmd(Interface *ppc, u8 cmd)
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{
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switch(ppc->mode)
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{
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case PPCMODE_UNI_SW :
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case PPCMODE_UNI_FW :
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case PPCMODE_BI_SW :
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case PPCMODE_BI_FW :
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{
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outb(cmd, ppc->lpt_addr);
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ppc->cur_ctrl ^= cmd_stb;
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outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
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break;
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}
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case PPCMODE_EPP_BYTE :
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case PPCMODE_EPP_WORD :
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case PPCMODE_EPP_DWORD :
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{
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outb(cmd, ppc->lpt_addr + 3);
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break;
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}
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}
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}
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//***************************************************************************
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static void ppc6_wr_data_byte(Interface *ppc, u8 data)
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{
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switch(ppc->mode)
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{
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case PPCMODE_UNI_SW :
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case PPCMODE_UNI_FW :
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case PPCMODE_BI_SW :
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case PPCMODE_BI_FW :
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{
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outb(data, ppc->lpt_addr);
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ppc->cur_ctrl ^= data_stb;
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outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
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break;
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}
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case PPCMODE_EPP_BYTE :
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case PPCMODE_EPP_WORD :
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case PPCMODE_EPP_DWORD :
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{
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outb(data, ppc->lpt_addr + 4);
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break;
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}
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}
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}
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//***************************************************************************
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static u8 ppc6_rd_data_byte(Interface *ppc)
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{
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u8 data = 0;
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switch(ppc->mode)
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{
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case PPCMODE_UNI_SW :
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case PPCMODE_UNI_FW :
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{
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ppc->cur_ctrl = (ppc->cur_ctrl & ~port_stb) ^ data_stb;
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outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
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// DELAY
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data = inb(ppc->lpt_addr + 1);
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data = ((data & 0x80) >> 1) | ((data & 0x38) >> 3);
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ppc->cur_ctrl |= port_stb;
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outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
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// DELAY
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data |= inb(ppc->lpt_addr + 1) & 0xB8;
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break;
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}
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case PPCMODE_BI_SW :
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case PPCMODE_BI_FW :
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{
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ppc->cur_ctrl |= port_dir;
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outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
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ppc->cur_ctrl = (ppc->cur_ctrl | port_stb) ^ data_stb;
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outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
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data = inb(ppc->lpt_addr);
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ppc->cur_ctrl &= ~port_stb;
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outb(ppc->cur_ctrl,ppc->lpt_addr + 2);
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ppc->cur_ctrl &= ~port_dir;
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outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
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break;
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}
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case PPCMODE_EPP_BYTE :
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case PPCMODE_EPP_WORD :
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case PPCMODE_EPP_DWORD :
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{
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outb((ppc->cur_ctrl | port_dir),ppc->lpt_addr + 2);
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data = inb(ppc->lpt_addr + 4);
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outb(ppc->cur_ctrl,ppc->lpt_addr + 2);
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break;
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}
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}
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return(data);
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}
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//***************************************************************************
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static u8 ppc6_rd_port(Interface *ppc, u8 port)
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{
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ppc6_send_cmd(ppc,(u8)(port | ACCESS_PORT | ACCESS_READ));
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return(ppc6_rd_data_byte(ppc));
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}
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//***************************************************************************
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static void ppc6_wr_port(Interface *ppc, u8 port, u8 data)
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{
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ppc6_send_cmd(ppc,(u8)(port | ACCESS_PORT | ACCESS_WRITE));
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ppc6_wr_data_byte(ppc, data);
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}
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//***************************************************************************
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static void ppc6_rd_data_blk(Interface *ppc, u8 *data, long count)
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{
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switch(ppc->mode)
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{
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case PPCMODE_UNI_SW :
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case PPCMODE_UNI_FW :
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{
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while(count)
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{
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u8 d;
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ppc->cur_ctrl = (ppc->cur_ctrl & ~port_stb) ^ data_stb;
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outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
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// DELAY
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d = inb(ppc->lpt_addr + 1);
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d = ((d & 0x80) >> 1) | ((d & 0x38) >> 3);
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ppc->cur_ctrl |= port_stb;
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outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
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// DELAY
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d |= inb(ppc->lpt_addr + 1) & 0xB8;
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*data++ = d;
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count--;
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}
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break;
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}
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case PPCMODE_BI_SW :
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case PPCMODE_BI_FW :
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{
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ppc->cur_ctrl |= port_dir;
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outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
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ppc->cur_ctrl |= port_stb;
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while(count)
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{
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ppc->cur_ctrl ^= data_stb;
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outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
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*data++ = inb(ppc->lpt_addr);
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count--;
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}
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ppc->cur_ctrl &= ~port_stb;
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outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
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ppc->cur_ctrl &= ~port_dir;
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outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
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break;
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}
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case PPCMODE_EPP_BYTE :
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{
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outb((ppc->cur_ctrl | port_dir), ppc->lpt_addr + 2);
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// DELAY
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while(count)
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{
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*data++ = inb(ppc->lpt_addr + 4);
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count--;
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}
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outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
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break;
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}
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case PPCMODE_EPP_WORD :
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{
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outb((ppc->cur_ctrl | port_dir), ppc->lpt_addr + 2);
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// DELAY
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while(count > 1)
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{
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*((u16 *)data) = inw(ppc->lpt_addr + 4);
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data += 2;
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count -= 2;
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}
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while(count)
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{
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*data++ = inb(ppc->lpt_addr + 4);
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count--;
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}
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outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
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break;
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}
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case PPCMODE_EPP_DWORD :
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{
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outb((ppc->cur_ctrl | port_dir),ppc->lpt_addr + 2);
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// DELAY
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while(count > 3)
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{
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*((u32 *)data) = inl(ppc->lpt_addr + 4);
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data += 4;
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count -= 4;
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}
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while(count)
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{
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*data++ = inb(ppc->lpt_addr + 4);
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count--;
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}
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outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
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break;
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}
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}
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}
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//***************************************************************************
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static void ppc6_wait_for_fifo(Interface *ppc)
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{
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int i;
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if (ppc->ppc_flags & fifo_wait)
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{
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for(i=0; i<20; i++)
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inb(ppc->lpt_addr + 1);
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}
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}
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//***************************************************************************
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static void ppc6_wr_data_blk(Interface *ppc, u8 *data, long count)
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{
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switch(ppc->mode)
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{
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case PPCMODE_UNI_SW :
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case PPCMODE_BI_SW :
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{
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while(count--)
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{
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outb(*data++, ppc->lpt_addr);
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ppc->cur_ctrl ^= data_stb;
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outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
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}
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break;
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}
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case PPCMODE_UNI_FW :
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case PPCMODE_BI_FW :
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{
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u8 this, last;
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ppc6_send_cmd(ppc,(CMD_PREFIX_SET | PREFIX_FASTWR));
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ppc->cur_ctrl |= port_stb;
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outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
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last = *data;
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outb(last, ppc->lpt_addr);
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while(count)
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{
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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);
|
|
}
|
|
|
|
//***************************************************************************
|
|
|