mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-11 13:56:30 +00:00
284 lines
7.2 KiB
C
284 lines
7.2 KiB
C
#include <common.h>
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#include <mpc8xx.h>
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#include <pcmcia.h>
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#undef CONFIG_PCMCIA
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#if defined(CONFIG_CMD_PCMCIA)
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#define CONFIG_PCMCIA
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#endif
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#if defined(CONFIG_CMD_IDE) && defined(CONFIG_IDE_8xx_PCCARD)
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#define CONFIG_PCMCIA
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#endif
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#ifdef CONFIG_PCMCIA
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#define PCMCIA_BOARD_MSG "C2MON"
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static void cfg_ports (void)
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{
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volatile immap_t *immap;
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volatile cpm8xx_t *cp;
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ushort sreg;
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immap = (immap_t *)CONFIG_SYS_IMMR;
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cp = (cpm8xx_t *)(&(((immap_t *)CONFIG_SYS_IMMR)->im_cpm));
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/*
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* Configure Port C for TPS2211 PC-Card Power-Interface Switch
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*
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* Switch off all voltages, assert shutdown
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*/
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sreg = immap->im_ioport.iop_pcdat;
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sreg |= (TPS2211_VPPD0 | TPS2211_VPPD1); /* VAVPP => Hi-Z */
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sreg &= ~(TPS2211_VCCD0 | TPS2211_VCCD1); /* 3V and 5V off */
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immap->im_ioport.iop_pcdat = sreg;
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immap->im_ioport.iop_pcpar &= ~(TPS2211_OUTPUTS);
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immap->im_ioport.iop_pcdir |= TPS2211_OUTPUTS;
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debug ("Set Port C: PAR: %04x DIR: %04x DAT: %04x\n",
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immap->im_ioport.iop_pcpar,
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immap->im_ioport.iop_pcdir,
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immap->im_ioport.iop_pcdat);
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/*
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* Configure Port B for TPS2211 PC-Card Power-Interface Switch
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*
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* Over-Current Input only
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*/
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cp->cp_pbpar &= ~(TPS2211_INPUTS);
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cp->cp_pbdir &= ~(TPS2211_INPUTS);
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debug ("Set Port B: PAR: %08x DIR: %08x DAT: %08x\n",
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cp->cp_pbpar, cp->cp_pbdir, cp->cp_pbdat);
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}
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int pcmcia_hardware_enable(int slot)
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{
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volatile immap_t *immap;
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volatile cpm8xx_t *cp;
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volatile pcmconf8xx_t *pcmp;
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volatile sysconf8xx_t *sysp;
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uint reg, pipr, mask;
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ushort sreg;
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int i;
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debug ("hardware_enable: " PCMCIA_BOARD_MSG " Slot %c\n", 'A'+slot);
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udelay(10000);
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immap = (immap_t *)CONFIG_SYS_IMMR;
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sysp = (sysconf8xx_t *)(&(((immap_t *)CONFIG_SYS_IMMR)->im_siu_conf));
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pcmp = (pcmconf8xx_t *)(&(((immap_t *)CONFIG_SYS_IMMR)->im_pcmcia));
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cp = (cpm8xx_t *)(&(((immap_t *)CONFIG_SYS_IMMR)->im_cpm));
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/* Configure Ports for TPS2211A PC-Card Power-Interface Switch */
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cfg_ports ();
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/*
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* Configure SIUMCR to enable PCMCIA port B
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* (VFLS[0:1] are not used for debugging, we connect FRZ# instead)
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*/
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sysp->sc_siumcr &= ~SIUMCR_DBGC11; /* set DBGC to 00 */
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/* clear interrupt state, and disable interrupts */
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pcmp->pcmc_pscr = PCMCIA_MASK(_slot_);
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pcmp->pcmc_per &= ~PCMCIA_MASK(_slot_);
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/*
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* Disable interrupts, DMA, and PCMCIA buffers
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* (isolate the interface) and assert RESET signal
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*/
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debug ("Disable PCMCIA buffers and assert RESET\n");
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reg = 0;
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reg |= __MY_PCMCIA_GCRX_CXRESET; /* active high */
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reg |= __MY_PCMCIA_GCRX_CXOE; /* active low */
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PCMCIA_PGCRX(_slot_) = reg;
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udelay(500);
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/*
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* Make sure there is a card in the slot, then configure the interface.
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*/
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udelay(10000);
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debug ("[%d] %s: PIPR(%p)=0x%x\n",
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__LINE__,__FUNCTION__,
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&(pcmp->pcmc_pipr),pcmp->pcmc_pipr);
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if (pcmp->pcmc_pipr & (0x18000000 >> (slot << 4))) {
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printf (" No Card found\n");
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return (1);
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}
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/*
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* Power On: Set VAVCC to 3.3V or 5V, set VAVPP to Hi-Z
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*/
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mask = PCMCIA_VS1(slot) | PCMCIA_VS2(slot);
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pipr = pcmp->pcmc_pipr;
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debug ("PIPR: 0x%x ==> VS1=o%s, VS2=o%s\n",
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pipr,
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(reg&PCMCIA_VS1(slot))?"n":"ff",
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(reg&PCMCIA_VS2(slot))?"n":"ff");
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sreg = immap->im_ioport.iop_pcdat;
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if ((pipr & mask) == mask) {
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sreg |= (TPS2211_VPPD0 | TPS2211_VPPD1 | /* VAVPP => Hi-Z */
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TPS2211_VCCD1); /* 5V on */
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sreg &= ~(TPS2211_VCCD0); /* 3V off */
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puts (" 5.0V card found: ");
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} else {
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sreg |= (TPS2211_VPPD0 | TPS2211_VPPD1 | /* VAVPP => Hi-Z */
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TPS2211_VCCD0); /* 3V on */
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sreg &= ~(TPS2211_VCCD1); /* 5V off */
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puts (" 3.3V card found: ");
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}
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debug ("\nPC DAT: %04x -> 3.3V %s 5.0V %s\n",
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sreg,
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( (sreg & TPS2211_VCCD0) && !(sreg & TPS2211_VCCD1)) ? "on" : "off",
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(!(sreg & TPS2211_VCCD0) && (sreg & TPS2211_VCCD1)) ? "on" : "off"
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);
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immap->im_ioport.iop_pcdat = sreg;
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/* Wait 500 ms; use this to check for over-current */
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for (i=0; i<5000; ++i) {
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if ((cp->cp_pbdat & TPS2211_OC) == 0) {
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printf (" *** Overcurrent - Safety shutdown ***\n");
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immap->im_ioport.iop_pcdat &= ~(TPS2211_VCCD0|TPS2211_VCCD1);
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return (1);
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}
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udelay (100);
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}
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debug ("Enable PCMCIA buffers and stop RESET\n");
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reg = PCMCIA_PGCRX(_slot_);
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reg &= ~__MY_PCMCIA_GCRX_CXRESET; /* active high */
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reg &= ~__MY_PCMCIA_GCRX_CXOE; /* active low */
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PCMCIA_PGCRX(_slot_) = reg;
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udelay(250000); /* some cards need >150 ms to come up :-( */
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debug ("# hardware_enable done\n");
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return (0);
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}
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#if defined(CONFIG_CMD_PCMCIA)
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int pcmcia_hardware_disable(int slot)
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{
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volatile immap_t *immap;
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volatile cpm8xx_t *cp;
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volatile pcmconf8xx_t *pcmp;
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u_long reg;
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debug ("hardware_disable: " PCMCIA_BOARD_MSG " Slot %c\n", 'A'+slot);
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immap = (immap_t *)CONFIG_SYS_IMMR;
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pcmp = (pcmconf8xx_t *)(&(((immap_t *)CONFIG_SYS_IMMR)->im_pcmcia));
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/* Configure PCMCIA General Control Register */
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debug ("Disable PCMCIA buffers and assert RESET\n");
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reg = 0;
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reg |= __MY_PCMCIA_GCRX_CXRESET; /* active high */
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reg |= __MY_PCMCIA_GCRX_CXOE; /* active low */
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PCMCIA_PGCRX(_slot_) = reg;
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/* ALl voltages off / Hi-Z */
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immap->im_ioport.iop_pcdat |= (TPS2211_VPPD0 | TPS2211_VPPD1 |
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TPS2211_VCCD0 | TPS2211_VCCD1 );
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udelay(10000);
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return (0);
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}
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#endif
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int pcmcia_voltage_set(int slot, int vcc, int vpp)
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{
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volatile immap_t *immap;
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volatile cpm8xx_t *cp;
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volatile pcmconf8xx_t *pcmp;
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u_long reg;
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ushort sreg;
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debug ("voltage_set: "
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PCMCIA_BOARD_MSG
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" Slot %c, Vcc=%d.%d, Vpp=%d.%d\n",
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'A'+slot, vcc/10, vcc%10, vpp/10, vcc%10);
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immap = (immap_t *)CONFIG_SYS_IMMR;
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cp = (cpm8xx_t *)(&(((immap_t *)CONFIG_SYS_IMMR)->im_cpm));
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pcmp = (pcmconf8xx_t *)(&(((immap_t *)CONFIG_SYS_IMMR)->im_pcmcia));
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/*
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* Disable PCMCIA buffers (isolate the interface)
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* and assert RESET signal
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*/
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debug ("Disable PCMCIA buffers and assert RESET\n");
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reg = PCMCIA_PGCRX(_slot_);
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reg |= __MY_PCMCIA_GCRX_CXRESET; /* active high */
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reg |= __MY_PCMCIA_GCRX_CXOE; /* active low */
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PCMCIA_PGCRX(_slot_) = reg;
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udelay(500);
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/*
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* Configure Port C pins for
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* 5 Volts Enable and 3 Volts enable,
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* Turn all power pins to Hi-Z
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*/
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debug ("PCMCIA power OFF\n");
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cfg_ports (); /* Enables switch, but all in Hi-Z */
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sreg = immap->im_ioport.iop_pcdat;
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sreg |= TPS2211_VPPD0 | TPS2211_VPPD1; /* VAVPP always Hi-Z */
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switch(vcc) {
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case 0: break; /* Switch off */
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case 33: sreg |= TPS2211_VCCD0; /* Switch on 3.3V */
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sreg &= ~TPS2211_VCCD1;
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break;
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case 50: sreg &= ~TPS2211_VCCD0; /* Switch on 5.0V */
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sreg |= TPS2211_VCCD1;
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break;
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default: goto done;
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}
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/* Checking supported voltages */
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debug ("PIPR: 0x%x --> %s\n",
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pcmp->pcmc_pipr,
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(pcmp->pcmc_pipr & 0x00008000) ? "only 5 V" : "can do 3.3V");
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immap->im_ioport.iop_pcdat = sreg;
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#ifdef DEBUG
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{
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char *s;
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if ((sreg & TPS2211_VCCD0) && !(sreg & TPS2211_VCCD1)) {
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s = "at 3.3V";
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} else if (!(sreg & TPS2211_VCCD0) && (sreg & TPS2211_VCCD1)) {
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s = "at 5.0V";
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} else {
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s = "down";
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}
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printf ("PCMCIA powered %s\n", s);
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}
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#endif
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done:
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debug ("Enable PCMCIA buffers and stop RESET\n");
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reg = PCMCIA_PGCRX(_slot_);
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reg &= ~__MY_PCMCIA_GCRX_CXRESET; /* active high */
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reg &= ~__MY_PCMCIA_GCRX_CXOE; /* active low */
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PCMCIA_PGCRX(_slot_) = reg;
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udelay(500);
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debug ("voltage_set: " PCMCIA_BOARD_MSG " Slot %c, DONE\n",
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slot+'A');
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return (0);
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}
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#endif /* CONFIG_PCMCIA */
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