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122 lines
2.5 KiB
122 lines
2.5 KiB
/* |
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** asm-m68k/pcmcia.c -- Amiga Linux PCMCIA support |
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** most information was found by disassembling card.resource |
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** I'm still looking for an official doc ! |
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** |
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** Copyright 1997 by Alain Malek |
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** |
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** This file is subject to the terms and conditions of the GNU General Public |
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** License. See the file COPYING in the main directory of this archive |
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** for more details. |
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** |
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** Created: 12/10/97 by Alain Malek |
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*/ |
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#include <linux/types.h> |
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#include <linux/jiffies.h> |
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#include <linux/timer.h> |
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#include <linux/module.h> |
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#include <asm/amigayle.h> |
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#include <asm/amipcmcia.h> |
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/* gayle config byte for program voltage and access speed */ |
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static unsigned char cfg_byte = GAYLE_CFG_0V|GAYLE_CFG_150NS; |
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void pcmcia_reset(void) |
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{ |
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unsigned long reset_start_time = jiffies; |
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unsigned char b; |
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gayle_reset = 0x00; |
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while (time_before(jiffies, reset_start_time + 1*HZ/100)); |
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b = gayle_reset; |
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} |
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EXPORT_SYMBOL(pcmcia_reset); |
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/* copy a tuple, including tuple header. return nb bytes copied */ |
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/* be careful as this may trigger a GAYLE_IRQ_WR interrupt ! */ |
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int pcmcia_copy_tuple(unsigned char tuple_id, void *tuple, int max_len) |
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{ |
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unsigned char id, *dest; |
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int cnt, pos, len; |
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dest = tuple; |
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pos = 0; |
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id = gayle_attribute[pos]; |
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while((id != CISTPL_END) && (pos < 0x10000)) { |
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len = (int)gayle_attribute[pos+2] + 2; |
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if (id == tuple_id) { |
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len = (len > max_len)?max_len:len; |
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for (cnt = 0; cnt < len; cnt++) { |
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*dest++ = gayle_attribute[pos+(cnt<<1)]; |
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} |
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return len; |
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} |
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pos += len<<1; |
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id = gayle_attribute[pos]; |
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} |
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return 0; |
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} |
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EXPORT_SYMBOL(pcmcia_copy_tuple); |
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void pcmcia_program_voltage(int voltage) |
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{ |
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unsigned char v; |
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switch (voltage) { |
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case PCMCIA_0V: |
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v = GAYLE_CFG_0V; |
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break; |
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case PCMCIA_5V: |
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v = GAYLE_CFG_5V; |
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break; |
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case PCMCIA_12V: |
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v = GAYLE_CFG_12V; |
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break; |
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default: |
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v = GAYLE_CFG_0V; |
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} |
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cfg_byte = (cfg_byte & 0xfc) | v; |
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gayle.config = cfg_byte; |
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} |
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EXPORT_SYMBOL(pcmcia_program_voltage); |
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void pcmcia_access_speed(int speed) |
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{ |
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unsigned char s; |
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if (speed <= PCMCIA_SPEED_100NS) |
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s = GAYLE_CFG_100NS; |
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else if (speed <= PCMCIA_SPEED_150NS) |
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s = GAYLE_CFG_150NS; |
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else if (speed <= PCMCIA_SPEED_250NS) |
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s = GAYLE_CFG_250NS; |
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else |
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s = GAYLE_CFG_720NS; |
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cfg_byte = (cfg_byte & 0xf3) | s; |
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gayle.config = cfg_byte; |
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} |
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EXPORT_SYMBOL(pcmcia_access_speed); |
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void pcmcia_write_enable(void) |
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{ |
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gayle.cardstatus = GAYLE_CS_WR|GAYLE_CS_DA; |
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} |
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EXPORT_SYMBOL(pcmcia_write_enable); |
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void pcmcia_write_disable(void) |
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{ |
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gayle.cardstatus = 0; |
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} |
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EXPORT_SYMBOL(pcmcia_write_disable); |
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