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https://github.com/edk2-porting/linux-next.git
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66213b3ccf
New PCMCIA socket driver for all Db/Pb1xxx boards (except Pb1000),
which replaces au1000_db1x00.c and (most of) au1000_pb1x00.c.
Notable improvements:
- supports Db1000, DB/PB1100/1500/1550/1200.
- support for carddetect and statuschange IRQs.
- pcmcia socket mem/io/attr areas and irqs passed through
platform resource information.
- doesn't freeze system during card insertion/ejection like
the one it replaces.
- boardtype is automatically detected using BCSR ID register.
Run-tested on the DB1200.
Cc: Linux-PCMCIA <linux-pcmcia@lists.infradead.org>
Signed-off-by: Manuel Lauss <manuel.lauss@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
298 lines
6.4 KiB
C
298 lines
6.4 KiB
C
/*
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*
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* Alchemy Semi Pb1000 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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* ########################################################################
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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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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/delay.h>
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#include <linux/ioport.h>
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#include <linux/kernel.h>
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#include <linux/timer.h>
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#include <linux/mm.h>
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#include <linux/proc_fs.h>
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#include <linux/types.h>
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#include <pcmcia/cs_types.h>
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#include <pcmcia/cs.h>
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#include <pcmcia/ss.h>
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#include <pcmcia/cistpl.h>
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#include <pcmcia/bus_ops.h>
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#include <asm/io.h>
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#include <asm/irq.h>
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#include <asm/system.h>
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#include <asm/au1000.h>
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#include <asm/au1000_pcmcia.h>
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#define debug(fmt, arg...) do { } while (0)
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#include <asm/pb1000.h>
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#define PCMCIA_IRQ AU1000_GPIO_15
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static int pb1x00_pcmcia_init(struct pcmcia_init *init)
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{
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u16 pcr;
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pcr = PCR_SLOT_0_RST | PCR_SLOT_1_RST;
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au_writel(0x8000, PB1000_MDR); /* clear pcmcia interrupt */
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au_sync_delay(100);
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au_writel(0x4000, PB1000_MDR); /* enable pcmcia interrupt */
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au_sync();
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pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,0);
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pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,1);
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au_writel(pcr, PB1000_PCR);
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au_sync_delay(20);
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return PCMCIA_NUM_SOCKS;
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}
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static int pb1x00_pcmcia_shutdown(void)
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{
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u16 pcr;
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pcr = PCR_SLOT_0_RST | PCR_SLOT_1_RST;
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pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,0);
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pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,1);
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au_writel(pcr, PB1000_PCR);
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au_sync_delay(20);
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return 0;
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}
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static int
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pb1x00_pcmcia_socket_state(unsigned sock, struct pcmcia_state *state)
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{
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u32 inserted0, inserted1;
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u16 vs0, vs1;
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vs0 = vs1 = (u16)au_readl(PB1000_ACR1);
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inserted0 = !(vs0 & (ACR1_SLOT_0_CD1 | ACR1_SLOT_0_CD2));
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inserted1 = !(vs1 & (ACR1_SLOT_1_CD1 | ACR1_SLOT_1_CD2));
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vs0 = (vs0 >> 4) & 0x3;
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vs1 = (vs1 >> 12) & 0x3;
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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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if (sock == 0) {
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if (inserted0) {
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switch (vs0) {
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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 "pb1x00 bad VS (%d)\n",
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vs0);
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return 0;
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}
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state->detect = 1;
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}
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}
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else {
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if (inserted1) {
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switch (vs1) {
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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 "pb1x00 bad VS (%d)\n",
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vs1);
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return 0;
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}
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state->detect = 1;
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}
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}
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if (state->detect) {
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state->ready = 1;
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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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return 1;
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}
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static int pb1x00_pcmcia_get_irq_info(struct pcmcia_irq_info *info)
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{
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if(info->sock > PCMCIA_MAX_SOCK) return -1;
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/*
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* Even in the case of the Pb1000, both sockets are connected
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* to the same irq line.
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*/
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info->irq = PCMCIA_IRQ;
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return 0;
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}
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static int
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pb1x00_pcmcia_configure_socket(const struct pcmcia_configure *configure)
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{
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u16 pcr;
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if(configure->sock > PCMCIA_MAX_SOCK) return -1;
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pcr = au_readl(PB1000_PCR);
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if (configure->sock == 0) {
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pcr &= ~(PCR_SLOT_0_VCC0 | PCR_SLOT_0_VCC1 |
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PCR_SLOT_0_VPP0 | PCR_SLOT_0_VPP1);
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}
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else {
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pcr &= ~(PCR_SLOT_1_VCC0 | PCR_SLOT_1_VCC1 |
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PCR_SLOT_1_VPP0 | PCR_SLOT_1_VPP1);
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}
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pcr &= ~PCR_SLOT_0_RST;
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debug("Vcc %dV Vpp %dV, pcr %x\n",
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configure->vcc, configure->vpp, pcr);
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switch(configure->vcc){
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case 0: /* Vcc 0 */
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switch(configure->vpp) {
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case 0:
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pcr |= SET_VCC_VPP(VCC_HIZ,VPP_GND,
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configure->sock);
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break;
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case 12:
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pcr |= SET_VCC_VPP(VCC_HIZ,VPP_12V,
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configure->sock);
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break;
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case 50:
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pcr |= SET_VCC_VPP(VCC_HIZ,VPP_5V,
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configure->sock);
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break;
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case 33:
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pcr |= SET_VCC_VPP(VCC_HIZ,VPP_3V,
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configure->sock);
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break;
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default:
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pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,
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configure->sock);
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printk("%s: bad Vcc/Vpp (%d:%d)\n",
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__func__,
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configure->vcc,
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configure->vpp);
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break;
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}
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break;
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case 50: /* Vcc 5V */
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switch(configure->vpp) {
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case 0:
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pcr |= SET_VCC_VPP(VCC_5V,VPP_GND,
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configure->sock);
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break;
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case 50:
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pcr |= SET_VCC_VPP(VCC_5V,VPP_5V,
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configure->sock);
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break;
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case 12:
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pcr |= SET_VCC_VPP(VCC_5V,VPP_12V,
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configure->sock);
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break;
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case 33:
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pcr |= SET_VCC_VPP(VCC_5V,VPP_3V,
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configure->sock);
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break;
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default:
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pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,
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configure->sock);
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printk("%s: bad Vcc/Vpp (%d:%d)\n",
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__func__,
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configure->vcc,
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configure->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(configure->vpp) {
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case 0:
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pcr |= SET_VCC_VPP(VCC_3V,VPP_GND,
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configure->sock);
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break;
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case 50:
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pcr |= SET_VCC_VPP(VCC_3V,VPP_5V,
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configure->sock);
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break;
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case 12:
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pcr |= SET_VCC_VPP(VCC_3V,VPP_12V,
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configure->sock);
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break;
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case 33:
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pcr |= SET_VCC_VPP(VCC_3V,VPP_3V,
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configure->sock);
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break;
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default:
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pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,
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configure->sock);
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printk("%s: bad Vcc/Vpp (%d:%d)\n",
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__func__,
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configure->vcc,
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configure->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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pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,configure->sock);
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printk(KERN_ERR "%s: bad Vcc %d\n",
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__func__, configure->vcc);
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break;
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}
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if (configure->sock == 0) {
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pcr &= ~(PCR_SLOT_0_RST);
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if (configure->reset)
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pcr |= PCR_SLOT_0_RST;
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}
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else {
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pcr &= ~(PCR_SLOT_1_RST);
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if (configure->reset)
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pcr |= PCR_SLOT_1_RST;
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}
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au_writel(pcr, PB1000_PCR);
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au_sync_delay(300);
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return 0;
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}
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struct pcmcia_low_level pb1x00_pcmcia_ops = {
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pb1x00_pcmcia_init,
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pb1x00_pcmcia_shutdown,
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pb1x00_pcmcia_socket_state,
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pb1x00_pcmcia_get_irq_info,
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pb1x00_pcmcia_configure_socket
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};
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