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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 22:20:36 (GMT) |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 22:20:36 (GMT) |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/pcmcia/au1000_db1x00.c | |
download | linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.xz |
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'drivers/pcmcia/au1000_db1x00.c')
-rw-r--r-- | drivers/pcmcia/au1000_db1x00.c | 288 |
1 files changed, 288 insertions, 0 deletions
diff --git a/drivers/pcmcia/au1000_db1x00.c b/drivers/pcmcia/au1000_db1x00.c new file mode 100644 index 0000000..42cf8bf --- /dev/null +++ b/drivers/pcmcia/au1000_db1x00.c @@ -0,0 +1,288 @@ +/* + * + * Alchemy Semi Db1x00 boards specific pcmcia routines. + * + * Copyright 2002 MontaVista Software Inc. + * Author: MontaVista Software, Inc. + * ppopov@mvista.com or source@mvista.com + * + * Copyright 2004 Pete Popov, updated the driver to 2.6. + * Followed the sa11xx API and largely copied many of the hardware + * independent functions. + * + * ######################################################################## + * + * This program is free software; you can distribute it and/or modify it + * under the terms of the GNU General Public License (Version 2) as + * published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA. + * + * ######################################################################## + * + * + */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/errno.h> +#include <linux/interrupt.h> +#include <linux/device.h> +#include <linux/init.h> + +#include <asm/irq.h> +#include <asm/signal.h> +#include <asm/mach-au1x00/au1000.h> +#include <asm/mach-db1x00/db1x00.h> + +#include "au1000_generic.h" + +#if 0 +#define debug(x,args...) printk(KERN_DEBUG "%s: " x, __func__ , ##args) +#else +#define debug(x,args...) +#endif + +static BCSR * const bcsr = (BCSR *)BCSR_KSEG1_ADDR; + +struct au1000_pcmcia_socket au1000_pcmcia_socket[PCMCIA_NUM_SOCKS]; +extern int au1x00_pcmcia_socket_probe(struct device *, struct pcmcia_low_level *, int, int); + +static int db1x00_pcmcia_hw_init(struct au1000_pcmcia_socket *skt) +{ +#ifdef CONFIG_MIPS_DB1550 + skt->irq = skt->nr ? AU1000_GPIO_5 : AU1000_GPIO_3; +#else + skt->irq = skt->nr ? AU1000_GPIO_5 : AU1000_GPIO_2; +#endif + return 0; +} + +static void db1x00_pcmcia_shutdown(struct au1000_pcmcia_socket *skt) +{ + bcsr->pcmcia = 0; /* turn off power */ + au_sync_delay(2); +} + +static void +db1x00_pcmcia_socket_state(struct au1000_pcmcia_socket *skt, struct pcmcia_state *state) +{ + u32 inserted; + unsigned char vs; + + state->ready = 0; + state->vs_Xv = 0; + state->vs_3v = 0; + state->detect = 0; + + switch (skt->nr) { + case 0: + vs = bcsr->status & 0x3; + inserted = !(bcsr->status & (1<<4)); + break; + case 1: + vs = (bcsr->status & 0xC)>>2; + inserted = !(bcsr->status & (1<<5)); + break; + default:/* should never happen */ + return; + } + + if (inserted) + debug("db1x00 socket %d: inserted %d, vs %d pcmcia %x\n", + skt->nr, inserted, vs, bcsr->pcmcia); + + if (inserted) { + switch (vs) { + case 0: + case 2: + state->vs_3v=1; + break; + case 3: /* 5V */ + break; + default: + /* return without setting 'detect' */ + printk(KERN_ERR "db1x00 bad VS (%d)\n", + vs); + } + state->detect = 1; + state->ready = 1; + } + else { + /* if the card was previously inserted and then ejected, + * we should turn off power to it + */ + if ((skt->nr == 0) && (bcsr->pcmcia & BCSR_PCMCIA_PC0RST)) { + bcsr->pcmcia &= ~(BCSR_PCMCIA_PC0RST | + BCSR_PCMCIA_PC0DRVEN | + BCSR_PCMCIA_PC0VPP | + BCSR_PCMCIA_PC0VCC); + au_sync_delay(10); + } + else if ((skt->nr == 1) && bcsr->pcmcia & BCSR_PCMCIA_PC1RST) { + bcsr->pcmcia &= ~(BCSR_PCMCIA_PC1RST | + BCSR_PCMCIA_PC1DRVEN | + BCSR_PCMCIA_PC1VPP | + BCSR_PCMCIA_PC1VCC); + au_sync_delay(10); + } + } + + state->bvd1=1; + state->bvd2=1; + state->wrprot=0; +} + +static int +db1x00_pcmcia_configure_socket(struct au1000_pcmcia_socket *skt, struct socket_state_t *state) +{ + u16 pwr; + int sock = skt->nr; + + debug("config_skt %d Vcc %dV Vpp %dV, reset %d\n", + sock, state->Vcc, state->Vpp, + state->flags & SS_RESET); + + /* pcmcia reg was set to zero at init time. Be careful when + * initializing a socket not to wipe out the settings of the + * other socket. + */ + pwr = bcsr->pcmcia; + pwr &= ~(0xf << sock*8); /* clear voltage settings */ + + state->Vpp = 0; + switch(state->Vcc){ + case 0: /* Vcc 0 */ + pwr |= SET_VCC_VPP(0,0,sock); + break; + case 50: /* Vcc 5V */ + switch(state->Vpp) { + case 0: + pwr |= SET_VCC_VPP(2,0,sock); + break; + case 50: + pwr |= SET_VCC_VPP(2,1,sock); + break; + case 12: + pwr |= SET_VCC_VPP(2,2,sock); + break; + case 33: + default: + pwr |= SET_VCC_VPP(0,0,sock); + printk("%s: bad Vcc/Vpp (%d:%d)\n", + __FUNCTION__, + state->Vcc, + state->Vpp); + break; + } + break; + case 33: /* Vcc 3.3V */ + switch(state->Vpp) { + case 0: + pwr |= SET_VCC_VPP(1,0,sock); + break; + case 12: + pwr |= SET_VCC_VPP(1,2,sock); + break; + case 33: + pwr |= SET_VCC_VPP(1,1,sock); + break; + case 50: + default: + pwr |= SET_VCC_VPP(0,0,sock); + printk("%s: bad Vcc/Vpp (%d:%d)\n", + __FUNCTION__, + state->Vcc, + state->Vpp); + break; + } + break; + default: /* what's this ? */ + pwr |= SET_VCC_VPP(0,0,sock); + printk(KERN_ERR "%s: bad Vcc %d\n", + __FUNCTION__, state->Vcc); + break; + } + + bcsr->pcmcia = pwr; + au_sync_delay(300); + + if (sock == 0) { + if (!(state->flags & SS_RESET)) { + pwr |= BCSR_PCMCIA_PC0DRVEN; + bcsr->pcmcia = pwr; + au_sync_delay(300); + pwr |= BCSR_PCMCIA_PC0RST; + bcsr->pcmcia = pwr; + au_sync_delay(100); + } + else { + pwr &= ~(BCSR_PCMCIA_PC0RST | BCSR_PCMCIA_PC0DRVEN); + bcsr->pcmcia = pwr; + au_sync_delay(100); + } + } + else { + if (!(state->flags & SS_RESET)) { + pwr |= BCSR_PCMCIA_PC1DRVEN; + bcsr->pcmcia = pwr; + au_sync_delay(300); + pwr |= BCSR_PCMCIA_PC1RST; + bcsr->pcmcia = pwr; + au_sync_delay(100); + } + else { + pwr &= ~(BCSR_PCMCIA_PC1RST | BCSR_PCMCIA_PC1DRVEN); + bcsr->pcmcia = pwr; + au_sync_delay(100); + } + } + return 0; +} + +/* + * Enable card status IRQs on (re-)initialisation. This can + * be called at initialisation, power management event, or + * pcmcia event. + */ +void db1x00_socket_init(struct au1000_pcmcia_socket *skt) +{ + /* nothing to do for now */ +} + +/* + * Disable card status IRQs and PCMCIA bus on suspend. + */ +void db1x00_socket_suspend(struct au1000_pcmcia_socket *skt) +{ + /* nothing to do for now */ +} + +struct pcmcia_low_level db1x00_pcmcia_ops = { + .owner = THIS_MODULE, + + .hw_init = db1x00_pcmcia_hw_init, + .hw_shutdown = db1x00_pcmcia_shutdown, + + .socket_state = db1x00_pcmcia_socket_state, + .configure_socket = db1x00_pcmcia_configure_socket, + + .socket_init = db1x00_socket_init, + .socket_suspend = db1x00_socket_suspend +}; + +int __init au1x_board_init(struct device *dev) +{ + int ret = -ENODEV; + bcsr->pcmcia = 0; /* turn off power, if it's not already off */ + au_sync_delay(2); + ret = au1x00_pcmcia_socket_probe(dev, &db1x00_pcmcia_ops, 0, 2); + return ret; +} |