pcmcia: CompactFlash driver for PA Semi Electra boards
Driver for the CompactFlash slot on the PA Semi Electra eval board. It's a simple device sitting on localbus, with interrupts and detect/voltage control over GPIO. The driver is implemented as an of_platform driver, and adds localbus as a bus being probed by the of_platform framework. [akpm@linux-foundation.org: cleanups] [olof@lixom.net: fix build] Signed-off-by: Olof Johansson <olof@lixom.net> Cc: Christoph Hellwig <hch@infradead.org> Cc: Milton Miller <miltonm@bga.com> Cc: Kumar Gala <galak@gate.crashing.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Dominik Brodowski <linux@dominikbrodowski.net> Signed-off-by: Olof Johansson <olof@lixom.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Olof Johansson
Linus Torvalds
Родитель
4975e45ff6
Коммит
2b571a066a
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@ -37,6 +37,10 @@
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#include <asm/time.h>
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#include <asm/of_platform.h>
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#include <pcmcia/ss.h>
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#include <pcmcia/cistpl.h>
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#include <pcmcia/ds.h>
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#include "pasemi.h"
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/* SDC reset register, must be pre-mapped at reset time */
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@ -308,7 +312,57 @@ static void __init pas_init_early(void)
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iommu_init_early_pasemi();
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}
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#ifdef CONFIG_PCMCIA
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static int pcmcia_notify(struct notifier_block *nb, unsigned long action,
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void *data)
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{
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struct device *dev = data;
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struct device *parent;
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struct pcmcia_device *pdev = to_pcmcia_dev(dev);
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/* We are only intereted in device addition */
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if (action != BUS_NOTIFY_ADD_DEVICE)
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return 0;
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parent = pdev->socket->dev.parent;
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/* We know electra_cf devices will always have of_node set, since
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* electra_cf is an of_platform driver.
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*/
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if (!parent->archdata.of_node)
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return 0;
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if (!of_device_is_compatible(parent->archdata.of_node, "electra-cf"))
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return 0;
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/* We use the direct ops for localbus */
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dev->archdata.dma_ops = &dma_direct_ops;
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return 0;
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}
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static struct notifier_block pcmcia_notifier = {
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.notifier_call = pcmcia_notify,
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};
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static inline void pasemi_pcmcia_init(void)
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{
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extern struct bus_type pcmcia_bus_type;
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bus_register_notifier(&pcmcia_bus_type, &pcmcia_notifier);
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}
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#else
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static inline void pasemi_pcmcia_init(void)
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{
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}
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#endif
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static struct of_device_id pasemi_bus_ids[] = {
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{ .type = "localbus", },
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{ .type = "sdc", },
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{},
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};
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@ -318,6 +372,8 @@ static int __init pasemi_publish_devices(void)
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if (!machine_is(pasemi))
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return 0;
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pasemi_pcmcia_init();
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/* Publish OF platform devices for SDC and other non-PCI devices */
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of_platform_bus_probe(NULL, pasemi_bus_ids, NULL);
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@ -269,6 +269,13 @@ config AT91_CF
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Say Y here to support the CompactFlash controller on AT91 chips.
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Or choose M to compile the driver as a module named "at91_cf".
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config ELECTRA_CF
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tristate "Electra CompactFlash Controller"
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depends on PCMCIA && PPC_PASEMI
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help
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Say Y here to support the CompactFlash controller on the
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PA Semi Electra eval board.
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config PCCARD_NONSTATIC
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tristate
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@ -37,6 +37,7 @@ obj-$(CONFIG_PCMCIA_VRC4171) += vrc4171_card.o
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obj-$(CONFIG_PCMCIA_VRC4173) += vrc4173_cardu.o
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obj-$(CONFIG_OMAP_CF) += omap_cf.o
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obj-$(CONFIG_AT91_CF) += at91_cf.o
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obj-$(CONFIG_ELECTRA_CF) += electra_cf.o
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sa11xx_core-y += soc_common.o sa11xx_base.o
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pxa2xx_core-y += soc_common.o pxa2xx_base.o
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@ -0,0 +1,377 @@
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/*
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* Copyright (C) 2007 PA Semi, Inc
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*
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* Maintained by: Olof Johansson <olof@lixom.net>
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*
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* Based on drivers/pcmcia/omap_cf.c
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 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/kernel.h>
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#include <linux/sched.h>
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#include <linux/platform_device.h>
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#include <linux/errno.h>
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#include <linux/init.h>
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#include <linux/delay.h>
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#include <linux/interrupt.h>
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#include <linux/vmalloc.h>
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#include <pcmcia/ss.h>
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#include <asm/of_platform.h>
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static const char driver_name[] = "electra-cf";
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struct electra_cf_socket {
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struct pcmcia_socket socket;
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struct timer_list timer;
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unsigned present:1;
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unsigned active:1;
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struct of_device *ofdev;
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unsigned long mem_phys;
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void __iomem * mem_base;
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unsigned long mem_size;
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void __iomem * io_virt;
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unsigned int io_base;
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unsigned int io_size;
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u_int irq;
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struct resource iomem;
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void __iomem * gpio_base;
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int gpio_detect;
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int gpio_vsense;
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int gpio_3v;
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int gpio_5v;
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};
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#define POLL_INTERVAL (2 * HZ)
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static int electra_cf_present(struct electra_cf_socket *cf)
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{
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unsigned int gpio;
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gpio = in_le32(cf->gpio_base+0x40);
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return !(gpio & (1 << cf->gpio_detect));
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}
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static int electra_cf_ss_init(struct pcmcia_socket *s)
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{
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return 0;
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}
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/* the timer is primarily to kick this socket's pccardd */
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static void electra_cf_timer(unsigned long _cf)
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{
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struct electra_cf_socket *cf = (void *) _cf;
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int present = electra_cf_present(cf);
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if (present != cf->present) {
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cf->present = present;
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pcmcia_parse_events(&cf->socket, SS_DETECT);
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}
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if (cf->active)
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mod_timer(&cf->timer, jiffies + POLL_INTERVAL);
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}
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static irqreturn_t electra_cf_irq(int irq, void *_cf)
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{
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electra_cf_timer((unsigned long)_cf);
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return IRQ_HANDLED;
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}
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static int electra_cf_get_status(struct pcmcia_socket *s, u_int *sp)
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{
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struct electra_cf_socket *cf;
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if (!sp)
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return -EINVAL;
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cf = container_of(s, struct electra_cf_socket, socket);
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/* NOTE CF is always 3VCARD */
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if (electra_cf_present(cf)) {
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*sp = SS_READY | SS_DETECT | SS_POWERON | SS_3VCARD;
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s->pci_irq = cf->irq;
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} else
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*sp = 0;
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return 0;
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}
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static int electra_cf_set_socket(struct pcmcia_socket *sock,
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struct socket_state_t *s)
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{
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unsigned int gpio;
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unsigned int vcc;
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struct electra_cf_socket *cf;
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cf = container_of(sock, struct electra_cf_socket, socket);
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/* "reset" means no power in our case */
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vcc = (s->flags & SS_RESET) ? 0 : s->Vcc;
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switch (vcc) {
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case 0:
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gpio = 0;
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break;
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case 33:
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gpio = (1 << cf->gpio_3v);
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break;
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case 5:
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gpio = (1 << cf->gpio_5v);
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break;
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default:
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return -EINVAL;
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}
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gpio |= 1 << (cf->gpio_3v + 16); /* enwr */
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gpio |= 1 << (cf->gpio_5v + 16); /* enwr */
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out_le32(cf->gpio_base+0x90, gpio);
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pr_debug("%s: Vcc %d, io_irq %d, flags %04x csc %04x\n",
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driver_name, s->Vcc, s->io_irq, s->flags, s->csc_mask);
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return 0;
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}
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static int electra_cf_set_io_map(struct pcmcia_socket *s,
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struct pccard_io_map *io)
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{
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return 0;
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}
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static int electra_cf_set_mem_map(struct pcmcia_socket *s,
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struct pccard_mem_map *map)
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{
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struct electra_cf_socket *cf;
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if (map->card_start)
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return -EINVAL;
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cf = container_of(s, struct electra_cf_socket, socket);
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map->static_start = cf->mem_phys;
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map->flags &= MAP_ACTIVE|MAP_ATTRIB;
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if (!(map->flags & MAP_ATTRIB))
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map->static_start += 0x800;
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return 0;
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}
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static struct pccard_operations electra_cf_ops = {
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.init = electra_cf_ss_init,
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.get_status = electra_cf_get_status,
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.set_socket = electra_cf_set_socket,
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.set_io_map = electra_cf_set_io_map,
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.set_mem_map = electra_cf_set_mem_map,
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};
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static int __devinit electra_cf_probe(struct of_device *ofdev,
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const struct of_device_id *match)
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{
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struct device *device = &ofdev->dev;
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struct device_node *np = ofdev->node;
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struct electra_cf_socket *cf;
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struct resource mem, io;
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int status;
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const unsigned int *prop;
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int err;
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struct vm_struct *area;
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err = of_address_to_resource(np, 0, &mem);
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if (err)
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return -EINVAL;
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err = of_address_to_resource(np, 1, &io);
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if (err)
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return -EINVAL;
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cf = kzalloc(sizeof *cf, GFP_KERNEL);
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if (!cf)
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return -ENOMEM;
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setup_timer(&cf->timer, electra_cf_timer, (unsigned long)cf);
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cf->irq = NO_IRQ;
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cf->ofdev = ofdev;
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cf->mem_phys = mem.start;
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cf->mem_size = PAGE_ALIGN(mem.end - mem.start);
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cf->mem_base = ioremap(cf->mem_phys, cf->mem_size);
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cf->io_size = PAGE_ALIGN(io.end - io.start);
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area = __get_vm_area(cf->io_size, 0, PHB_IO_BASE, PHB_IO_END);
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if (area == NULL)
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return -ENOMEM;
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cf->io_virt = (void __iomem *)(area->addr);
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cf->gpio_base = ioremap(0xfc103000, 0x1000);
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dev_set_drvdata(device, cf);
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if (!cf->mem_base || !cf->io_virt || !cf->gpio_base ||
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(__ioremap_at(io.start, cf->io_virt, cf->io_size,
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_PAGE_NO_CACHE | _PAGE_GUARDED) == NULL)) {
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dev_err(device, "can't ioremap ranges\n");
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status = -ENOMEM;
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goto fail1;
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}
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cf->io_base = (unsigned long)cf->io_virt - VMALLOC_END;
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cf->iomem.start = (unsigned long)cf->mem_base;
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cf->iomem.end = (unsigned long)cf->mem_base + (mem.end - mem.start);
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cf->iomem.flags = IORESOURCE_MEM;
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cf->irq = irq_of_parse_and_map(np, 0);
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status = request_irq(cf->irq, electra_cf_irq, IRQF_SHARED,
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driver_name, cf);
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if (status < 0) {
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dev_err(device, "request_irq failed\n");
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goto fail1;
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}
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cf->socket.pci_irq = cf->irq;
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prop = of_get_property(np, "card-detect-gpio", NULL);
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if (!prop)
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goto fail1;
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cf->gpio_detect = *prop;
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prop = of_get_property(np, "card-vsense-gpio", NULL);
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if (!prop)
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goto fail1;
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cf->gpio_vsense = *prop;
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prop = of_get_property(np, "card-3v-gpio", NULL);
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if (!prop)
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goto fail1;
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cf->gpio_3v = *prop;
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prop = of_get_property(np, "card-5v-gpio", NULL);
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if (!prop)
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goto fail1;
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cf->gpio_5v = *prop;
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cf->socket.io_offset = cf->io_base;
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/* reserve chip-select regions */
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if (!request_mem_region(cf->mem_phys, cf->mem_size, driver_name)) {
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status = -ENXIO;
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dev_err(device, "Can't claim memory region\n");
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goto fail1;
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}
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if (!request_region(cf->io_base, cf->io_size, driver_name)) {
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status = -ENXIO;
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dev_err(device, "Can't claim I/O region\n");
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goto fail2;
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}
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cf->socket.owner = THIS_MODULE;
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cf->socket.dev.parent = &ofdev->dev;
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cf->socket.ops = &electra_cf_ops;
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cf->socket.resource_ops = &pccard_static_ops;
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cf->socket.features = SS_CAP_PCCARD | SS_CAP_STATIC_MAP |
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SS_CAP_MEM_ALIGN;
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cf->socket.map_size = 0x800;
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status = pcmcia_register_socket(&cf->socket);
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if (status < 0) {
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dev_err(device, "pcmcia_register_socket failed\n");
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goto fail3;
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}
|
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dev_info(device, "at mem 0x%lx io 0x%lx irq %d\n",
|
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cf->mem_phys, io.start, cf->irq);
|
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|
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cf->active = 1;
|
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electra_cf_timer((unsigned long)cf);
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return 0;
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fail3:
|
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release_region(cf->io_base, cf->io_size);
|
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fail2:
|
||||
release_mem_region(cf->mem_phys, cf->mem_size);
|
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fail1:
|
||||
if (cf->irq != NO_IRQ)
|
||||
free_irq(cf->irq, cf);
|
||||
|
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if (cf->io_virt)
|
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__iounmap_at(cf->io_virt, cf->io_size);
|
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if (cf->mem_base)
|
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iounmap(cf->mem_base);
|
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if (cf->gpio_base)
|
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iounmap(cf->gpio_base);
|
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device_init_wakeup(&ofdev->dev, 0);
|
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kfree(cf);
|
||||
return status;
|
||||
|
||||
}
|
||||
|
||||
static int __devexit electra_cf_remove(struct of_device *ofdev)
|
||||
{
|
||||
struct device *device = &ofdev->dev;
|
||||
struct electra_cf_socket *cf;
|
||||
|
||||
cf = dev_get_drvdata(device);
|
||||
|
||||
cf->active = 0;
|
||||
pcmcia_unregister_socket(&cf->socket);
|
||||
free_irq(cf->irq, cf);
|
||||
del_timer_sync(&cf->timer);
|
||||
|
||||
__iounmap_at(cf->io_virt, cf->io_size);
|
||||
iounmap(cf->mem_base);
|
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iounmap(cf->gpio_base);
|
||||
release_mem_region(cf->mem_phys, cf->mem_size);
|
||||
release_region(cf->io_base, cf->io_size);
|
||||
|
||||
kfree(cf);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct of_device_id electra_cf_match[] = {
|
||||
{
|
||||
.compatible = "electra-cf",
|
||||
},
|
||||
{},
|
||||
};
|
||||
|
||||
static struct of_platform_driver electra_cf_driver = {
|
||||
.name = (char *)driver_name,
|
||||
.match_table = electra_cf_match,
|
||||
.probe = electra_cf_probe,
|
||||
.remove = electra_cf_remove,
|
||||
};
|
||||
|
||||
static int __init electra_cf_init(void)
|
||||
{
|
||||
return of_register_platform_driver(&electra_cf_driver);
|
||||
}
|
||||
module_init(electra_cf_init);
|
||||
|
||||
static void __exit electra_cf_exit(void)
|
||||
{
|
||||
of_unregister_platform_driver(&electra_cf_driver);
|
||||
}
|
||||
module_exit(electra_cf_exit);
|
||||
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_AUTHOR ("Olof Johansson <olof@lixom.net>");
|
||||
MODULE_DESCRIPTION("PA Semi Electra CF driver");
|
||||
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