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[/] [or1k_soc_on_altera_embedded_dev_kit/] [trunk/] [linux-2.6/] [linux-2.6.24/] [arch/] [m68k/] [amiga/] [pcmcia.c] - Rev 3
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/* ** asm-m68k/pcmcia.c -- Amiga Linux PCMCIA support ** most information was found by disassembling card.resource ** I'm still looking for an official doc ! ** ** Copyright 1997 by Alain Malek ** ** This file is subject to the terms and conditions of the GNU General Public ** License. See the file COPYING in the main directory of this archive ** for more details. ** ** Created: 12/10/97 by Alain Malek */ #include <linux/types.h> #include <linux/jiffies.h> #include <linux/timer.h> #include <asm/amigayle.h> #include <asm/amipcmcia.h> /* gayle config byte for program voltage and access speed */ static unsigned char cfg_byte = GAYLE_CFG_0V|GAYLE_CFG_150NS; void pcmcia_reset(void) { unsigned long reset_start_time = jiffies; unsigned char b; gayle_reset = 0x00; while (time_before(jiffies, reset_start_time + 1*HZ/100)); b = gayle_reset; } /* copy a tuple, including tuple header. return nb bytes copied */ /* be careful as this may trigger a GAYLE_IRQ_WR interrupt ! */ int pcmcia_copy_tuple(unsigned char tuple_id, void *tuple, int max_len) { unsigned char id, *dest; int cnt, pos, len; dest = tuple; pos = 0; id = gayle_attribute[pos]; while((id != CISTPL_END) && (pos < 0x10000)) { len = (int)gayle_attribute[pos+2] + 2; if (id == tuple_id) { len = (len > max_len)?max_len:len; for (cnt = 0; cnt < len; cnt++) { *dest++ = gayle_attribute[pos+(cnt<<1)]; } return len; } pos += len<<1; id = gayle_attribute[pos]; } return 0; } void pcmcia_program_voltage(int voltage) { unsigned char v; switch (voltage) { case PCMCIA_0V: v = GAYLE_CFG_0V; break; case PCMCIA_5V: v = GAYLE_CFG_5V; break; case PCMCIA_12V: v = GAYLE_CFG_12V; break; default: v = GAYLE_CFG_0V; } cfg_byte = (cfg_byte & 0xfc) | v; gayle.config = cfg_byte; } void pcmcia_access_speed(int speed) { unsigned char s; if (speed <= PCMCIA_SPEED_100NS) s = GAYLE_CFG_100NS; else if (speed <= PCMCIA_SPEED_150NS) s = GAYLE_CFG_150NS; else if (speed <= PCMCIA_SPEED_250NS) s = GAYLE_CFG_250NS; else s = GAYLE_CFG_720NS; cfg_byte = (cfg_byte & 0xf3) | s; gayle.config = cfg_byte; } void pcmcia_write_enable(void) { gayle.cardstatus = GAYLE_CS_WR|GAYLE_CS_DA; } void pcmcia_write_disable(void) { gayle.cardstatus = 0; }