mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-15 17:28:15 +00:00
370 lines
8.5 KiB
C
370 lines
8.5 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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/* some sane bit macros */
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#define _BD(_b) (1U << (31-(_b)))
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#define _BDR(_l, _h) (((((1U << (31-(_l))) - 1) << 1) | 1) & ~((1U << (31-(_h))) - 1))
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#define _BW(_b) (1U << (15-(_b)))
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#define _BWR(_l, _h) (((((1U << (15-(_l))) - 1) << 1) | 1) & ~((1U << (15-(_h))) - 1))
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#define _BB(_b) (1U << (7-(_b)))
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#define _BBR(_l, _h) (((((1U << (7-(_l))) - 1) << 1) | 1) & ~((1U << (7-(_h))) - 1))
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#define _B(_b) _BD(_b)
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#define _BR(_l, _h) _BDR(_l, _h)
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#define PCMCIA_BOARD_MSG "NETTA"
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static const unsigned short vppd_masks[2] = { _BW(14), _BW(15) };
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static void cfg_vppd(int no)
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{
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volatile immap_t *immap = (immap_t *)CFG_IMMR;
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unsigned short mask;
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if ((unsigned int)no >= sizeof(vppd_masks)/sizeof(vppd_masks[0]))
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return;
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mask = vppd_masks[no];
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immap->im_ioport.iop_papar &= ~mask;
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immap->im_ioport.iop_paodr &= ~mask;
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immap->im_ioport.iop_padir |= mask;
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}
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static void set_vppd(int no, int what)
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{
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volatile immap_t *immap = (immap_t *)CFG_IMMR;
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unsigned short mask;
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if ((unsigned int)no >= sizeof(vppd_masks)/sizeof(vppd_masks[0]))
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return;
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mask = vppd_masks[no];
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if (what)
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immap->im_ioport.iop_padat |= mask;
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else
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immap->im_ioport.iop_padat &= ~mask;
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}
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static const unsigned short vccd_masks[2] = { _BW(10), _BW(6) };
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static void cfg_vccd(int no)
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{
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volatile immap_t *immap = (immap_t *)CFG_IMMR;
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unsigned short mask;
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if ((unsigned int)no >= sizeof(vccd_masks)/sizeof(vccd_masks[0]))
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return;
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mask = vccd_masks[no];
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immap->im_ioport.iop_papar &= ~mask;
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immap->im_ioport.iop_paodr &= ~mask;
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immap->im_ioport.iop_padir |= mask;
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}
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static void set_vccd(int no, int what)
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{
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volatile immap_t *immap = (immap_t *)CFG_IMMR;
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unsigned short mask;
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if ((unsigned int)no >= sizeof(vccd_masks)/sizeof(vccd_masks[0]))
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return;
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mask = vccd_masks[no];
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if (what)
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immap->im_ioport.iop_padat |= mask;
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else
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immap->im_ioport.iop_padat &= ~mask;
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}
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static const unsigned short oc_mask = _BW(8);
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static void cfg_oc(void)
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{
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volatile immap_t *immap = (immap_t *)CFG_IMMR;
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unsigned short mask = oc_mask;
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immap->im_ioport.iop_pcdir &= ~mask;
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immap->im_ioport.iop_pcso &= ~mask;
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immap->im_ioport.iop_pcint &= ~mask;
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immap->im_ioport.iop_pcpar &= ~mask;
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}
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static int get_oc(void)
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{
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volatile immap_t *immap = (immap_t *)CFG_IMMR;
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unsigned short mask = oc_mask;
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int what;
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what = !!(immap->im_ioport.iop_pcdat & mask);;
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return what;
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}
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static const unsigned short shdn_mask = _BW(12);
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static void cfg_shdn(void)
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{
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volatile immap_t *immap = (immap_t *)CFG_IMMR;
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unsigned short mask;
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mask = shdn_mask;
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immap->im_ioport.iop_papar &= ~mask;
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immap->im_ioport.iop_paodr &= ~mask;
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immap->im_ioport.iop_padir |= mask;
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}
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static void set_shdn(int what)
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{
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volatile immap_t *immap = (immap_t *)CFG_IMMR;
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unsigned short mask;
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mask = shdn_mask;
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if (what)
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immap->im_ioport.iop_padat |= mask;
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else
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immap->im_ioport.iop_padat &= ~mask;
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}
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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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immap = (immap_t *)CFG_IMMR;
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cp = (cpm8xx_t *)(&(((immap_t *)CFG_IMMR)->im_cpm));
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cfg_vppd(0); cfg_vppd(1); /* VPPD0,VPPD1 VAVPP => Hi-Z */
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cfg_vccd(0); cfg_vccd(1); /* 3V and 5V off */
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cfg_shdn();
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cfg_oc();
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/*
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* Configure Port A 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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set_vppd(0, 1); set_vppd(1, 1);
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set_vccd(0, 0); set_vccd(1, 0);
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set_shdn(1);
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udelay(100000);
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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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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 *)CFG_IMMR;
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sysp = (sysconf8xx_t *)(&(((immap_t *)CFG_IMMR)->im_siu_conf));
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pcmp = (pcmconf8xx_t *)(&(((immap_t *)CFG_IMMR)->im_pcmcia));
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cp = (cpm8xx_t *)(&(((immap_t *)CFG_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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/* 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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if ((pipr & mask) == mask) {
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set_vppd(0, 1); set_vppd(1, 1); /* VAVPP => Hi-Z */
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set_vccd(0, 0); set_vccd(1, 1); /* 5V on, 3V off */
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puts (" 5.0V card found: ");
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} else {
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set_vppd(0, 1); set_vppd(1, 1); /* VAVPP => Hi-Z */
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set_vccd(0, 1); set_vccd(1, 0); /* 5V off, 3V on */
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puts (" 3.3V card found: ");
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}
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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 (!get_oc()) {
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printf (" *** Overcurrent - Safety shutdown ***\n");
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set_vccd(0, 0); set_vccd(1, 0); /* VAVPP => Hi-Z */
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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 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 *)CFG_IMMR;
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pcmp = (pcmconf8xx_t *)(&(((immap_t *)CFG_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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set_vppd(0, 1); set_vppd(1, 1);
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set_vccd(0, 1); set_vccd(1, 1);
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udelay(10000);
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return (0);
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}
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#endif /* CFG_CMD_PCMCIA */
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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 *)CFG_IMMR;
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cp = (cpm8xx_t *)(&(((immap_t *)CFG_IMMR)->im_cpm));
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pcmp = (pcmconf8xx_t *)(&(((immap_t *)CFG_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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set_vppd(0, 1); set_vppd(1, 1);
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switch(vcc) {
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case 0:
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break; /* Switch off */
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case 33:
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set_vccd(0, 1); set_vccd(1, 0);
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break;
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case 50:
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set_vccd(0, 0); set_vccd(1, 1);
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break;
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default:
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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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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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