diff options
Diffstat (limited to 'board/kup/common/pcmcia.c')
| -rw-r--r-- | board/kup/common/pcmcia.c | 225 |
1 files changed, 225 insertions, 0 deletions
diff --git a/board/kup/common/pcmcia.c b/board/kup/common/pcmcia.c new file mode 100644 index 0000000000..1f61a0ecd1 --- /dev/null +++ b/board/kup/common/pcmcia.c @@ -0,0 +1,225 @@ +#include <common.h> +#include <mpc8xx.h> +#include <pcmcia.h> + +#undef CONFIG_PCMCIA + +#if (CONFIG_COMMANDS & CFG_CMD_PCMCIA) +#define CONFIG_PCMCIA +#endif + +#if (CONFIG_COMMANDS & CFG_CMD_IDE) && defined(CONFIG_IDE_8xx_PCCARD) +#define CONFIG_PCMCIA +#endif + +#ifdef CONFIG_PCMCIA + +#define PCMCIA_BOARD_MSG "KUP" + +#define KUP4K_PCMCIA_B_3V3 (0x00020000) + +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; + + debug ("hardware_enable: " PCMCIA_BOARD_MSG " Slot %c\n", 'A'+slot); + + udelay(10000); + + immap = (immap_t *)CFG_IMMR; + sysp = (sysconf8xx_t *)(&(((immap_t *)CFG_IMMR)->im_siu_conf)); + pcmp = (pcmconf8xx_t *)(&(((immap_t *)CFG_IMMR)->im_pcmcia)); + cp = (cpm8xx_t *)(&(((immap_t *)CFG_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(2500); + + /* + * Configure Port B pins for + * 3 Volts enable + */ + if (slot) { /* Slot A is built-in */ + cp->cp_pbdir |= KUP4K_PCMCIA_B_3V3; + cp->cp_pbpar &= ~KUP4K_PCMCIA_B_3V3; + /* remove all power */ + cp->cp_pbdat |= KUP4K_PCMCIA_B_3V3; /* active low */ + } + /* + * 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. + */ + printf("%s Slot %c:", slot ? "" : "\n", 'A' + slot); + 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) { + puts (" 5.0V card found: NOT SUPPORTED !!!\n"); + } else { + if(slot) + cp->cp_pbdat &= ~KUP4K_PCMCIA_B_3V3; + puts (" 3.3V card found: "); + } +#if 0 + /* VCC switch error flag, PCMCIA slot INPACK_ pin */ + cp->cp_pbdir &= ~(0x0020 | 0x0010); + cp->cp_pbpar &= ~(0x0020 | 0x0010); + udelay(500000); +#endif + 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 (CONFIG_COMMANDS & CFG_CMD_PCMCIA) +int pcmcia_hardware_disable(int slot) +{ + volatile immap_t *immap; + volatile cpm8xx_t *cp; + volatile pcmconf8xx_t *pcmp; + u_long reg; + + debug ("hardware_disable: " PCMCIA_BOARD_MSG " Slot %c\n", 'A'+slot); + + immap = (immap_t *)CFG_IMMR; + pcmp = (pcmconf8xx_t *)(&(((immap_t *)CFG_IMMR)->im_pcmcia)); + cp = (cpm8xx_t *)(&(((immap_t *)CFG_IMMR)->im_cpm)); + + /* remove all power */ + if (slot) + cp->cp_pbdat |= KUP4K_PCMCIA_B_3V3; + + /* 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; + + udelay(10000); + + return (0); +} +#endif /* CFG_CMD_PCMCIA */ + + +int pcmcia_voltage_set(int slot, int vcc, int vpp) +{ + volatile immap_t *immap; + volatile cpm8xx_t *cp; + volatile pcmconf8xx_t *pcmp; + u_long reg; + + 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); + + if (!slot) /* Slot A is not configurable */ + return 0; + + immap = (immap_t *)CFG_IMMR; + pcmp = (pcmconf8xx_t *)(&(((immap_t *)CFG_IMMR)->im_pcmcia)); + cp = (cpm8xx_t *)(&(((immap_t *)CFG_IMMR)->im_cpm)); + + /* + * 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); + + debug ("PCMCIA power OFF\n"); + /* + * Configure Port B pins for + * 3 Volts enable + */ + cp->cp_pbdir |= KUP4K_PCMCIA_B_3V3; + cp->cp_pbpar &= ~KUP4K_PCMCIA_B_3V3; + /* remove all power */ + cp->cp_pbdat |= KUP4K_PCMCIA_B_3V3; /* active low */ + + switch(vcc) { + case 0: break; + case 33: + cp->cp_pbdat &= ~KUP4K_PCMCIA_B_3V3; + debug ("PCMCIA powered at 3.3V\n"); + break; + case 50: + debug ("PCMCIA: 5Volt vcc not supported\n"); + break; + default: + puts("PCMCIA: vcc not supported"); + break; + } + udelay(10000); + /* Checking supported voltages */ + + debug ("PIPR: 0x%x --> %s\n", + pcmp->pcmc_pipr, + (pcmp->pcmc_pipr & (0x80000000 >> (slot << 4))) + ? "only 5 V --> NOT SUPPORTED" + : "can do 3.3V"); + + + 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 */ |