#include <common.h> #include <mpc8xx.h> #include <pcmcia.h> #include <i2c.h> #undef CONFIG_PCMCIA #if defined(CONFIG_CMD_PCMCIA) #define CONFIG_PCMCIA #endif #if defined(CONFIG_CMD_IDE) && defined(CONFIG_IDE_8xx_PCCARD) #define CONFIG_PCMCIA #endif #ifdef CONFIG_PCMCIA #define PCMCIA_BOARD_MSG "LWMON" /* #define's for MAX1604 Power Switch */ #define MAX1604_OP_SUS 0x80 #define MAX1604_VCCBON 0x40 #define MAX1604_VCC_35 0x20 #define MAX1604_VCCBHIZ 0x10 #define MAX1604_VPPBON 0x08 #define MAX1604_VPPBPBPGM 0x04 #define MAX1604_VPPBHIZ 0x02 /* reserved 0x01 */ int pcmcia_hardware_enable(int slot) { volatile immap_t *immap; volatile cpm8xx_t *cp; volatile pcmconf8xx_t *pcmp; volatile sysconf8xx_t *sysp; uint reg, mask; uchar val; debug ("hardware_enable: " PCMCIA_BOARD_MSG " Slot %c\n", 'A'+slot); /* Switch on PCMCIA port in PIC register 0x60 */ reg = pic_read (0x60); debug ("[%d] PIC read: reg_60 = 0x%02x\n", __LINE__, reg); reg &= ~0x10; /* reg |= 0x08; Vpp not needed */ pic_write (0x60, reg); #ifdef DEBUG reg = pic_read (0x60); printf ("[%d] PIC read: reg_60 = 0x%02x\n", __LINE__, reg); #endif udelay(10000); immap = (immap_t *)CONFIG_SYS_IMMR; sysp = (sysconf8xx_t *)(&(((immap_t *)CONFIG_SYS_IMMR)->im_siu_conf)); pcmp = (pcmconf8xx_t *)(&(((immap_t *)CONFIG_SYS_IMMR)->im_pcmcia)); cp = (cpm8xx_t *)(&(((immap_t *)CONFIG_SYS_IMMR)->im_cpm)); /* * Configure SIUMCR to enable PCMCIA port B * (VFLS[0:1] are not used for debugging, we connect FRZ# instead) */ sysp->sc_siumcr &= ~SIUMCR_DBGC11; /* set DBGC to 00 */ /* clear interrupt state, and disable interrupts */ pcmp->pcmc_pscr = PCMCIA_MASK(_slot_); pcmp->pcmc_per &= ~PCMCIA_MASK(_slot_); /* * Disable interrupts, DMA, and PCMCIA buffers * (isolate the interface) and assert RESET signal */ debug ("Disable PCMCIA buffers and assert RESET\n"); reg = 0; reg |= __MY_PCMCIA_GCRX_CXRESET; /* active high */ reg |= __MY_PCMCIA_GCRX_CXOE; /* active low */ PCMCIA_PGCRX(_slot_) = reg; udelay(500); /* * Make sure there is a card in the slot, then configure the interface. */ udelay(10000); debug ("[%d] %s: PIPR(%p)=0x%x\n", __LINE__,__FUNCTION__, &(pcmp->pcmc_pipr),pcmp->pcmc_pipr); if (pcmp->pcmc_pipr & (0x18000000 >> (slot << 4))) { printf (" No Card found\n"); return (1); } /* * Power On. */ mask = PCMCIA_VS1(slot) | PCMCIA_VS2(slot); reg = pcmp->pcmc_pipr; debug ("PIPR: 0x%x ==> VS1=o%s, VS2=o%s\n", reg, (reg&PCMCIA_VS1(slot))?"n":"ff", (reg&PCMCIA_VS2(slot))?"n":"ff"); if ((reg & mask) == mask) { val = 0; /* VCCB3/5 = 0 ==> use Vx = 5.0 V */ puts (" 5.0V card found: "); } else { val = MAX1604_VCC_35; /* VCCB3/5 = 1 ==> use Vy = 3.3 V */ puts (" 3.3V card found: "); } /* switch VCC on */ val |= MAX1604_OP_SUS | MAX1604_VCCBON; i2c_init (CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE); i2c_write (CONFIG_SYS_I2C_POWER_A_ADDR, 0, 0, &val, 1); udelay(500000); debug ("Enable PCMCIA buffers and stop RESET\n"); reg = PCMCIA_PGCRX(_slot_); reg &= ~__MY_PCMCIA_GCRX_CXRESET; /* active high */ reg &= ~__MY_PCMCIA_GCRX_CXOE; /* active low */ PCMCIA_PGCRX(_slot_) = reg; udelay(250000); /* some cards need >150 ms to come up :-( */ debug ("# hardware_enable done\n"); return (0); } #if defined(CONFIG_CMD_PCMCIA) int pcmcia_hardware_disable(int slot) { volatile immap_t *immap; volatile pcmconf8xx_t *pcmp; u_long reg; uchar val; debug ("hardware_disable: " PCMCIA_BOARD_MSG " Slot %c\n", 'A'+slot); immap = (immap_t *)CONFIG_SYS_IMMR; pcmp = (pcmconf8xx_t *)(&(((immap_t *)CONFIG_SYS_IMMR)->im_pcmcia)); /* remove all power, put output in high impedance state */ val = MAX1604_VCCBHIZ | MAX1604_VPPBHIZ; i2c_init (CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE); i2c_write (CONFIG_SYS_I2C_POWER_A_ADDR, 0, 0, &val, 1); /* Configure PCMCIA General Control Register */ debug ("Disable PCMCIA buffers and assert RESET\n"); reg = 0; reg |= __MY_PCMCIA_GCRX_CXRESET; /* active high */ reg |= __MY_PCMCIA_GCRX_CXOE; /* active low */ PCMCIA_PGCRX(_slot_) = reg; /* Switch off PCMCIA port in PIC register 0x60 */ reg = pic_read (0x60); debug ("[%d] PIC read: reg_60 = 0x%02x\n", __LINE__, reg); reg |= 0x10; reg &= ~0x08; pic_write (0x60, reg); #ifdef DEBUG reg = pic_read (0x60); printf ("[%d] PIC read: reg_60 = 0x%02x\n", __LINE__, reg); #endif udelay(10000); return (0); } #endif int pcmcia_voltage_set(int slot, int vcc, int vpp) { volatile immap_t *immap; volatile pcmconf8xx_t *pcmp; u_long reg; uchar val; debug ("voltage_set: " PCMCIA_BOARD_MSG " Slot %c, Vcc=%d.%d, Vpp=%d.%d\n", 'A'+slot, vcc/10, vcc%10, vpp/10, vcc%10); immap = (immap_t *)CONFIG_SYS_IMMR; pcmp = (pcmconf8xx_t *)(&(((immap_t *)CONFIG_SYS_IMMR)->im_pcmcia)); /* * Disable PCMCIA buffers (isolate the interface) * and assert RESET signal */ debug ("Disable PCMCIA buffers and assert RESET\n"); reg = PCMCIA_PGCRX(_slot_); reg |= __MY_PCMCIA_GCRX_CXRESET; /* active high */ reg |= __MY_PCMCIA_GCRX_CXOE; /* active low */ PCMCIA_PGCRX(_slot_) = reg; udelay(500); /* * Turn off all power (switch to high impedance) */ debug ("PCMCIA power OFF\n"); val = MAX1604_VCCBHIZ | MAX1604_VPPBHIZ; i2c_init (CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE); i2c_write (CONFIG_SYS_I2C_POWER_A_ADDR, 0, 0, &val, 1); val = 0; switch(vcc) { case 0: break; case 33: val = MAX1604_VCC_35; break; case 50: break; default: goto done; } /* Checking supported voltages */ debug ("PIPR: 0x%x --> %s\n", pcmp->pcmc_pipr, (pcmp->pcmc_pipr & 0x00008000) ? "only 5 V" : "can do 3.3V"); i2c_write (CONFIG_SYS_I2C_POWER_A_ADDR, 0, 0, &val, 1); if (val) { debug ("PCMCIA powered at %sV\n", (val & MAX1604_VCC_35) ? "3.3" : "5.0"); } else { debug ("PCMCIA powered down\n"); } done: debug ("Enable PCMCIA buffers and stop RESET\n"); reg = PCMCIA_PGCRX(_slot_); reg &= ~__MY_PCMCIA_GCRX_CXRESET; /* active high */ reg &= ~__MY_PCMCIA_GCRX_CXOE; /* active low */ PCMCIA_PGCRX(_slot_) = reg; udelay(500); debug ("voltage_set: " PCMCIA_BOARD_MSG " Slot %c, DONE\n", slot+'A'); return (0); } #endif /* CONFIG_PCMCIA */