diff options
Diffstat (limited to 'u-boot/drivers/pcmcia/mpc8xx_pcmcia.c')
| -rw-r--r-- | u-boot/drivers/pcmcia/mpc8xx_pcmcia.c | 273 |
1 files changed, 273 insertions, 0 deletions
diff --git a/u-boot/drivers/pcmcia/mpc8xx_pcmcia.c b/u-boot/drivers/pcmcia/mpc8xx_pcmcia.c new file mode 100644 index 0000000..74a50f1 --- /dev/null +++ b/u-boot/drivers/pcmcia/mpc8xx_pcmcia.c @@ -0,0 +1,273 @@ +#include <common.h> +#include <mpc8xx.h> +#include <pcmcia.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 + +#if defined(CONFIG_PCMCIA) + +#if defined(CONFIG_IDE_8xx_PCCARD) +extern int check_ide_device (int slot); +#endif + +extern int pcmcia_hardware_enable (int slot); +extern int pcmcia_voltage_set(int slot, int vcc, int vpp); + +#if defined(CONFIG_CMD_PCMCIA) +extern int pcmcia_hardware_disable(int slot); +#endif + +static u_int m8xx_get_graycode(u_int size); +#if 0 /* Disabled */ +static u_int m8xx_get_speed(u_int ns, u_int is_io); +#endif + +/* look up table for pgcrx registers */ +u_int *pcmcia_pgcrx[2] = { + &((immap_t *)CONFIG_SYS_IMMR)->im_pcmcia.pcmc_pgcra, + &((immap_t *)CONFIG_SYS_IMMR)->im_pcmcia.pcmc_pgcrb, +}; + +/* + * Search this table to see if the windowsize is + * supported... + */ + +#define M8XX_SIZES_NO 32 + +static const u_int m8xx_size_to_gray[M8XX_SIZES_NO] = +{ 0x00000001, 0x00000002, 0x00000008, 0x00000004, + 0x00000080, 0x00000040, 0x00000010, 0x00000020, + 0x00008000, 0x00004000, 0x00001000, 0x00002000, + 0x00000100, 0x00000200, 0x00000800, 0x00000400, + + 0x0fffffff, 0xffffffff, 0xffffffff, 0xffffffff, + 0x01000000, 0x02000000, 0xffffffff, 0x04000000, + 0x00010000, 0x00020000, 0x00080000, 0x00040000, + 0x00800000, 0x00400000, 0x00100000, 0x00200000 }; + + +/* -------------------------------------------------------------------- */ + +#if defined(CONFIG_LWMON) || defined(CONFIG_NSCU) +#define CONFIG_SYS_PCMCIA_TIMING ( PCMCIA_SHT(9) \ + | PCMCIA_SST(3) \ + | PCMCIA_SL(12)) +#else +#define CONFIG_SYS_PCMCIA_TIMING ( PCMCIA_SHT(2) \ + | PCMCIA_SST(4) \ + | PCMCIA_SL(9)) +#endif + +/* -------------------------------------------------------------------- */ + +int pcmcia_on (void) +{ + u_long reg, base; + pcmcia_win_t *win; + u_int slotbit; + u_int rc, slot; + int i; + + debug ("Enable PCMCIA " PCMCIA_SLOT_MSG "\n"); + + /* intialize the fixed memory windows */ + win = (pcmcia_win_t *)(&((immap_t *)CONFIG_SYS_IMMR)->im_pcmcia.pcmc_pbr0); + base = CONFIG_SYS_PCMCIA_MEM_ADDR; + + if((reg = m8xx_get_graycode(CONFIG_SYS_PCMCIA_MEM_SIZE)) == -1) { + printf ("Cannot set window size to 0x%08x\n", + CONFIG_SYS_PCMCIA_MEM_SIZE); + return (1); + } + + slotbit = PCMCIA_SLOT_x; + for (i=0; i<PCMCIA_MEM_WIN_NO; ++i) { + win->br = base; + +#if (PCMCIA_SOCKETS_NO == 2) + if (i == 4) /* Another slot starting from win 4 */ + slotbit = (slotbit ? PCMCIA_PSLOT_A : PCMCIA_PSLOT_B); +#endif + switch (i) { +#ifdef CONFIG_IDE_8xx_PCCARD + case 4: + case 0: { /* map attribute memory */ + win->or = ( PCMCIA_BSIZE_64M + | PCMCIA_PPS_8 + | PCMCIA_PRS_ATTR + | slotbit + | PCMCIA_PV + | CONFIG_SYS_PCMCIA_TIMING ); + break; + } + case 5: + case 1: { /* map I/O window for data reg */ + win->or = ( PCMCIA_BSIZE_1K + | PCMCIA_PPS_16 + | PCMCIA_PRS_IO + | slotbit + | PCMCIA_PV + | CONFIG_SYS_PCMCIA_TIMING ); + break; + } + case 6: + case 2: { /* map I/O window for cmd/ctrl reg block */ + win->or = ( PCMCIA_BSIZE_1K + | PCMCIA_PPS_8 + | PCMCIA_PRS_IO + | slotbit + | PCMCIA_PV + | CONFIG_SYS_PCMCIA_TIMING ); + break; + } +#endif /* CONFIG_IDE_8xx_PCCARD */ + default: /* set to not valid */ + win->or = 0; + break; + } + + debug ("MemWin %d: PBR 0x%08lX POR %08lX\n", + i, win->br, win->or); + base += CONFIG_SYS_PCMCIA_MEM_SIZE; + ++win; + } + + for (i=0, rc=0, slot=_slot_; i<PCMCIA_SOCKETS_NO; i++, slot = !slot) { + /* turn off voltage */ + if ((rc = pcmcia_voltage_set(slot, 0, 0))) + continue; + + /* Enable external hardware */ + if ((rc = pcmcia_hardware_enable(slot))) + continue; + +#ifdef CONFIG_IDE_8xx_PCCARD + if ((rc = check_ide_device(i))) + continue; +#endif + } + return rc; +} + +#if defined(CONFIG_CMD_PCMCIA) +int pcmcia_off (void) +{ + int i; + pcmcia_win_t *win; + + printf ("Disable PCMCIA " PCMCIA_SLOT_MSG "\n"); + + /* clear interrupt state, and disable interrupts */ + ((immap_t *)CONFIG_SYS_IMMR)->im_pcmcia.pcmc_pscr = PCMCIA_MASK(_slot_); + ((immap_t *)CONFIG_SYS_IMMR)->im_pcmcia.pcmc_per &= ~PCMCIA_MASK(_slot_); + + /* turn off interrupt and disable CxOE */ + PCMCIA_PGCRX(_slot_) = __MY_PCMCIA_GCRX_CXOE; + + /* turn off memory windows */ + win = (pcmcia_win_t *)(&((immap_t *)CONFIG_SYS_IMMR)->im_pcmcia.pcmc_pbr0); + + for (i=0; i<PCMCIA_MEM_WIN_NO; ++i) { + /* disable memory window */ + win->or = 0; + ++win; + } + + /* turn off voltage */ + pcmcia_voltage_set(_slot_, 0, 0); + + /* disable external hardware */ + printf ("Shutdown and Poweroff " PCMCIA_SLOT_MSG "\n"); + pcmcia_hardware_disable(_slot_); + return 0; +} +#endif + + +static u_int m8xx_get_graycode(u_int size) +{ + u_int k; + + for (k = 0; k < M8XX_SIZES_NO; k++) { + if(m8xx_size_to_gray[k] == size) + break; + } + + if((k == M8XX_SIZES_NO) || (m8xx_size_to_gray[k] == -1)) + k = -1; + + return k; +} + +#if 0 + +#if defined(CONFIG_RPXCLASSIC) || defined(CONFIG_RPXLITE) + +/* The RPX boards seems to have it's bus monitor timeout set to 6*8 clocks. + * SYPCR is write once only, therefore must the slowest memory be faster + * than the bus monitor or we will get a machine check due to the bus timeout. + */ +#undef PCMCIA_BMT_LIMIT +#define PCMCIA_BMT_LIMIT (6*8) +#endif + +static u_int m8xx_get_speed(u_int ns, u_int is_io) +{ + u_int reg, clocks, psst, psl, psht; + + if(!ns) { + + /* + * We get called with IO maps setup to 0ns + * if not specified by the user. + * They should be 255ns. + */ + + if(is_io) + ns = 255; + else + ns = 100; /* fast memory if 0 */ + } + + /* + * In PSST, PSL, PSHT fields we tell the controller + * timing parameters in CLKOUT clock cycles. + * CLKOUT is the same as GCLK2_50. + */ + + /* how we want to adjust the timing - in percent */ + +#define ADJ 180 /* 80 % longer accesstime - to be sure */ + + clocks = ((M8XX_BUSFREQ / 1000) * ns) / 1000; + clocks = (clocks * ADJ) / (100*1000); + + if(clocks >= PCMCIA_BMT_LIMIT) { + DEBUG(0, "Max access time limit reached\n"); + clocks = PCMCIA_BMT_LIMIT-1; + } + + psst = clocks / 7; /* setup time */ + psht = clocks / 7; /* hold time */ + psl = (clocks * 5) / 7; /* strobe length */ + + psst += clocks - (psst + psht + psl); + + reg = psst << 12; + reg |= psl << 7; + reg |= psht << 16; + + return reg; +} +#endif /* 0 */ + +#endif /* CONFIG_PCMCIA */ |