mirror of https://gitee.com/openkylin/linux.git
307 lines
7.2 KiB
C
307 lines
7.2 KiB
C
/*
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*
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* Alchemy Semi Db1x00 boards specific pcmcia routines.
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*
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* Copyright 2002 MontaVista Software Inc.
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* Author: MontaVista Software, Inc.
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* ppopov@mvista.com or source@mvista.com
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*
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* Copyright 2004 Pete Popov, updated the driver to 2.6.
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* Followed the sa11xx API and largely copied many of the hardware
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* independent functions.
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*
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* ########################################################################
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*
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* This program is free software; you can distribute it and/or modify it
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* under the terms of the GNU General Public License (Version 2) as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
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*
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* ########################################################################
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*
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*
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*/
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#include <linux/config.h>
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/interrupt.h>
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#include <linux/device.h>
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#include <linux/init.h>
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#include <asm/irq.h>
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#include <asm/signal.h>
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#include <asm/mach-au1x00/au1000.h>
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#if defined(CONFIG_MIPS_DB1200)
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#include <db1200.h>
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#elif defined(CONFIG_MIPS_PB1200)
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#include <pb1200.h>
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#else
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#include <asm/mach-db1x00/db1x00.h>
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static BCSR * const bcsr = (BCSR *)BCSR_KSEG1_ADDR;
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#endif
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#include "au1000_generic.h"
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#if 0
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#define debug(x,args...) printk(KERN_DEBUG "%s: " x, __func__ , ##args)
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#else
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#define debug(x,args...)
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#endif
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struct au1000_pcmcia_socket au1000_pcmcia_socket[PCMCIA_NUM_SOCKS];
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extern int au1x00_pcmcia_socket_probe(struct device *, struct pcmcia_low_level *, int, int);
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static int db1x00_pcmcia_hw_init(struct au1000_pcmcia_socket *skt)
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{
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#ifdef CONFIG_MIPS_DB1550
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skt->irq = skt->nr ? AU1000_GPIO_5 : AU1000_GPIO_3;
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#elif defined(CONFIG_MIPS_DB1200) || defined(CONFIG_MIPS_PB1200)
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skt->irq = skt->nr ? BOARD_PC1_INT : BOARD_PC0_INT;
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#else
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skt->irq = skt->nr ? AU1000_GPIO_5 : AU1000_GPIO_2;
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#endif
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return 0;
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}
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static void db1x00_pcmcia_shutdown(struct au1000_pcmcia_socket *skt)
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{
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bcsr->pcmcia = 0; /* turn off power */
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au_sync_delay(2);
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}
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static void
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db1x00_pcmcia_socket_state(struct au1000_pcmcia_socket *skt, struct pcmcia_state *state)
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{
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u32 inserted;
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unsigned char vs;
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state->ready = 0;
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state->vs_Xv = 0;
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state->vs_3v = 0;
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state->detect = 0;
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switch (skt->nr) {
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case 0:
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vs = bcsr->status & 0x3;
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#if defined(CONFIG_MIPS_DB1200) || defined(CONFIG_MIPS_PB1200)
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inserted = BOARD_CARD_INSERTED(0);
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#else
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inserted = !(bcsr->status & (1<<4));
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#endif
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break;
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case 1:
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vs = (bcsr->status & 0xC)>>2;
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#if defined(CONFIG_MIPS_DB1200) || defined(CONFIG_MIPS_PB1200)
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inserted = BOARD_CARD_INSERTED(1);
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#else
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inserted = !(bcsr->status & (1<<5));
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#endif
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break;
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default:/* should never happen */
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return;
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}
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if (inserted)
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debug("db1x00 socket %d: inserted %d, vs %d pcmcia %x\n",
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skt->nr, inserted, vs, bcsr->pcmcia);
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if (inserted) {
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switch (vs) {
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case 0:
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case 2:
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state->vs_3v=1;
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break;
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case 3: /* 5V */
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break;
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default:
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/* return without setting 'detect' */
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printk(KERN_ERR "db1x00 bad VS (%d)\n",
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vs);
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}
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state->detect = 1;
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state->ready = 1;
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}
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else {
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/* if the card was previously inserted and then ejected,
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* we should turn off power to it
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*/
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if ((skt->nr == 0) && (bcsr->pcmcia & BCSR_PCMCIA_PC0RST)) {
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bcsr->pcmcia &= ~(BCSR_PCMCIA_PC0RST |
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BCSR_PCMCIA_PC0DRVEN |
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BCSR_PCMCIA_PC0VPP |
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BCSR_PCMCIA_PC0VCC);
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au_sync_delay(10);
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}
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else if ((skt->nr == 1) && bcsr->pcmcia & BCSR_PCMCIA_PC1RST) {
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bcsr->pcmcia &= ~(BCSR_PCMCIA_PC1RST |
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BCSR_PCMCIA_PC1DRVEN |
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BCSR_PCMCIA_PC1VPP |
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BCSR_PCMCIA_PC1VCC);
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au_sync_delay(10);
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}
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}
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state->bvd1=1;
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state->bvd2=1;
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state->wrprot=0;
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}
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static int
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db1x00_pcmcia_configure_socket(struct au1000_pcmcia_socket *skt, struct socket_state_t *state)
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{
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u16 pwr;
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int sock = skt->nr;
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debug("config_skt %d Vcc %dV Vpp %dV, reset %d\n",
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sock, state->Vcc, state->Vpp,
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state->flags & SS_RESET);
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/* pcmcia reg was set to zero at init time. Be careful when
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* initializing a socket not to wipe out the settings of the
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* other socket.
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*/
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pwr = bcsr->pcmcia;
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pwr &= ~(0xf << sock*8); /* clear voltage settings */
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state->Vpp = 0;
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switch(state->Vcc){
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case 0: /* Vcc 0 */
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pwr |= SET_VCC_VPP(0,0,sock);
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break;
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case 50: /* Vcc 5V */
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switch(state->Vpp) {
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case 0:
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pwr |= SET_VCC_VPP(2,0,sock);
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break;
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case 50:
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pwr |= SET_VCC_VPP(2,1,sock);
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break;
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case 12:
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pwr |= SET_VCC_VPP(2,2,sock);
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break;
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case 33:
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default:
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pwr |= SET_VCC_VPP(0,0,sock);
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printk("%s: bad Vcc/Vpp (%d:%d)\n",
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__FUNCTION__,
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state->Vcc,
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state->Vpp);
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break;
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}
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break;
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case 33: /* Vcc 3.3V */
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switch(state->Vpp) {
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case 0:
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pwr |= SET_VCC_VPP(1,0,sock);
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break;
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case 12:
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pwr |= SET_VCC_VPP(1,2,sock);
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break;
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case 33:
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pwr |= SET_VCC_VPP(1,1,sock);
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break;
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case 50:
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default:
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pwr |= SET_VCC_VPP(0,0,sock);
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printk("%s: bad Vcc/Vpp (%d:%d)\n",
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__FUNCTION__,
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state->Vcc,
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state->Vpp);
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break;
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}
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break;
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default: /* what's this ? */
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pwr |= SET_VCC_VPP(0,0,sock);
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printk(KERN_ERR "%s: bad Vcc %d\n",
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__FUNCTION__, state->Vcc);
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break;
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}
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bcsr->pcmcia = pwr;
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au_sync_delay(300);
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if (sock == 0) {
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if (!(state->flags & SS_RESET)) {
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pwr |= BCSR_PCMCIA_PC0DRVEN;
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bcsr->pcmcia = pwr;
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au_sync_delay(300);
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pwr |= BCSR_PCMCIA_PC0RST;
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bcsr->pcmcia = pwr;
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au_sync_delay(100);
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}
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else {
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pwr &= ~(BCSR_PCMCIA_PC0RST | BCSR_PCMCIA_PC0DRVEN);
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bcsr->pcmcia = pwr;
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au_sync_delay(100);
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}
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}
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else {
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if (!(state->flags & SS_RESET)) {
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pwr |= BCSR_PCMCIA_PC1DRVEN;
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bcsr->pcmcia = pwr;
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au_sync_delay(300);
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pwr |= BCSR_PCMCIA_PC1RST;
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bcsr->pcmcia = pwr;
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au_sync_delay(100);
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}
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else {
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pwr &= ~(BCSR_PCMCIA_PC1RST | BCSR_PCMCIA_PC1DRVEN);
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bcsr->pcmcia = pwr;
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au_sync_delay(100);
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}
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}
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return 0;
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}
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/*
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* Enable card status IRQs on (re-)initialisation. This can
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* be called at initialisation, power management event, or
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* pcmcia event.
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*/
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void db1x00_socket_init(struct au1000_pcmcia_socket *skt)
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{
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/* nothing to do for now */
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}
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/*
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* Disable card status IRQs and PCMCIA bus on suspend.
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*/
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void db1x00_socket_suspend(struct au1000_pcmcia_socket *skt)
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{
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/* nothing to do for now */
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}
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struct pcmcia_low_level db1x00_pcmcia_ops = {
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.owner = THIS_MODULE,
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.hw_init = db1x00_pcmcia_hw_init,
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.hw_shutdown = db1x00_pcmcia_shutdown,
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.socket_state = db1x00_pcmcia_socket_state,
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.configure_socket = db1x00_pcmcia_configure_socket,
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.socket_init = db1x00_socket_init,
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.socket_suspend = db1x00_socket_suspend
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};
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int __init au1x_board_init(struct device *dev)
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{
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int ret = -ENODEV;
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bcsr->pcmcia = 0; /* turn off power, if it's not already off */
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au_sync_delay(2);
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ret = au1x00_pcmcia_socket_probe(dev, &db1x00_pcmcia_ops, 0, 2);
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return ret;
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}
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