--- /dev/null
+/*
+ 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);
+}
+
+//***************************************************************************
+
Code Review / kvmfornfv.git / blobdiff