pcmcia: CompactFlash driver for PA Semi Electra boards (2b571a06) · Commits · 戴 / test

arch/powerpc/platforms/pasemi/setup.c

+56 −0

Original line number	Diff line number	Diff line
		@@ -37,6 +37,10 @@
		#include <asm/time.h>
		#include <asm/of_platform.h>

		#include <pcmcia/ss.h>
		#include <pcmcia/cistpl.h>
		#include <pcmcia/ds.h>

		#include "pasemi.h"

		/* SDC reset register, must be pre-mapped at reset time */
		@@ -308,7 +312,57 @@ static void __init pas_init_early(void)
		iommu_init_early_pasemi();
		}

		#ifdef CONFIG_PCMCIA
		static int pcmcia_notify(struct notifier_block *nb, unsigned long action,
		void *data)
		{
		struct device *dev = data;
		struct device *parent;
		struct pcmcia_device *pdev = to_pcmcia_dev(dev);

		/* We are only intereted in device addition */
		if (action != BUS_NOTIFY_ADD_DEVICE)
		return 0;

		parent = pdev->socket->dev.parent;

		/* We know electra_cf devices will always have of_node set, since
		* electra_cf is an of_platform driver.
		*/
		if (!parent->archdata.of_node)
		return 0;

		if (!of_device_is_compatible(parent->archdata.of_node, "electra-cf"))
		return 0;

		/* We use the direct ops for localbus */
		dev->archdata.dma_ops = &dma_direct_ops;

		return 0;
		}

		static struct notifier_block pcmcia_notifier = {
		.notifier_call = pcmcia_notify,
		};

		static inline void pasemi_pcmcia_init(void)
		{
		extern struct bus_type pcmcia_bus_type;

		bus_register_notifier(&pcmcia_bus_type, &pcmcia_notifier);
		}

		#else

		static inline void pasemi_pcmcia_init(void)
		{
		}

		#endif


		static struct of_device_id pasemi_bus_ids[] = {
		{ .type = "localbus", },
		{ .type = "sdc", },
		{},
		};
		@@ -318,6 +372,8 @@ static int __init pasemi_publish_devices(void)
		if (!machine_is(pasemi))
		return 0;

		pasemi_pcmcia_init();

		/* Publish OF platform devices for SDC and other non-PCI devices */
		of_platform_bus_probe(NULL, pasemi_bus_ids, NULL);

drivers/pcmcia/Kconfig

+7 −0

Original line number	Diff line number	Diff line
		@@ -269,6 +269,13 @@ config AT91_CF
		Say Y here to support the CompactFlash controller on AT91 chips.
		Or choose M to compile the driver as a module named "at91_cf".

		config ELECTRA_CF
		tristate "Electra CompactFlash Controller"
		depends on PCMCIA && PPC_PASEMI
		help
		Say Y here to support the CompactFlash controller on the
		PA Semi Electra eval board.

		config PCCARD_NONSTATIC
		tristate

drivers/pcmcia/Makefile

+1 −0

Original line number	Diff line number	Diff line
		@@ -37,6 +37,7 @@ obj-$(CONFIG_PCMCIA_VRC4171) += vrc4171_card.o
		obj-$(CONFIG_PCMCIA_VRC4173) += vrc4173_cardu.o
		obj-$(CONFIG_OMAP_CF) += omap_cf.o
		obj-$(CONFIG_AT91_CF) += at91_cf.o
		obj-$(CONFIG_ELECTRA_CF) += electra_cf.o

		sa11xx_core-y += soc_common.o sa11xx_base.o
		pxa2xx_core-y += soc_common.o pxa2xx_base.o

drivers/pcmcia/electra_cf.c

0 → 100644

+377 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright (C) 2007 PA Semi, Inc
		*
		* Maintained by: Olof Johansson <olof@lixom.net>
		*
		* Based on drivers/pcmcia/omap_cf.c
		*
		* This program is free software; you can redistribute it and/or modify
		* it under the terms of the GNU General Public License as published by
		* the Free Software Foundation; either version 2 of the License, or
		* (at your option) any later version.
		*
		* This program is distributed in the hope that 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/sched.h>
		#include <linux/platform_device.h>
		#include <linux/errno.h>
		#include <linux/init.h>
		#include <linux/delay.h>
		#include <linux/interrupt.h>
		#include <linux/vmalloc.h>

		#include <pcmcia/ss.h>
		#include <asm/of_platform.h>

		static const char driver_name[] = "electra-cf";

		struct electra_cf_socket {
		struct pcmcia_socket socket;

		struct timer_list timer;
		unsigned present:1;
		unsigned active:1;

		struct of_device *ofdev;
		unsigned long mem_phys;
		void __iomem * mem_base;
		unsigned long mem_size;
		void __iomem * io_virt;
		unsigned int io_base;
		unsigned int io_size;
		u_int irq;
		struct resource iomem;
		void __iomem * gpio_base;
		int gpio_detect;
		int gpio_vsense;
		int gpio_3v;
		int gpio_5v;
		};

		#define POLL_INTERVAL (2 * HZ)


		static int electra_cf_present(struct electra_cf_socket *cf)
		{
		unsigned int gpio;

		gpio = in_le32(cf->gpio_base+0x40);
		return !(gpio & (1 << cf->gpio_detect));
		}

		static int electra_cf_ss_init(struct pcmcia_socket *s)
		{
		return 0;
		}

		/* the timer is primarily to kick this socket's pccardd */
		static void electra_cf_timer(unsigned long _cf)
		{
		struct electra_cf_socket cf = (void ) _cf;
		int present = electra_cf_present(cf);

		if (present != cf->present) {
		cf->present = present;
		pcmcia_parse_events(&cf->socket, SS_DETECT);
		}

		if (cf->active)
		mod_timer(&cf->timer, jiffies + POLL_INTERVAL);
		}

		static irqreturn_t electra_cf_irq(int irq, void *_cf)
		{
		electra_cf_timer((unsigned long)_cf);
		return IRQ_HANDLED;
		}

		static int electra_cf_get_status(struct pcmcia_socket s, u_int sp)
		{
		struct electra_cf_socket *cf;

		if (!sp)
		return -EINVAL;

		cf = container_of(s, struct electra_cf_socket, socket);

		/* NOTE CF is always 3VCARD */
		if (electra_cf_present(cf)) {
		*sp = SS_READY \| SS_DETECT \| SS_POWERON \| SS_3VCARD;

		s->pci_irq = cf->irq;
		} else
		*sp = 0;
		return 0;
		}

		static int electra_cf_set_socket(struct pcmcia_socket *sock,
		struct socket_state_t *s)
		{
		unsigned int gpio;
		unsigned int vcc;
		struct electra_cf_socket *cf;

		cf = container_of(sock, struct electra_cf_socket, socket);

		/* "reset" means no power in our case */
		vcc = (s->flags & SS_RESET) ? 0 : s->Vcc;

		switch (vcc) {
		case 0:
		gpio = 0;
		break;
		case 33:
		gpio = (1 << cf->gpio_3v);
		break;
		case 5:
		gpio = (1 << cf->gpio_5v);
		break;
		default:
		return -EINVAL;
		}

		gpio \|= 1 << (cf->gpio_3v + 16); /* enwr */
		gpio \|= 1 << (cf->gpio_5v + 16); /* enwr */
		out_le32(cf->gpio_base+0x90, gpio);

		pr_debug("%s: Vcc %d, io_irq %d, flags %04x csc %04x\n",
		driver_name, s->Vcc, s->io_irq, s->flags, s->csc_mask);

		return 0;
		}

		static int electra_cf_set_io_map(struct pcmcia_socket *s,
		struct pccard_io_map *io)
		{
		return 0;
		}

		static int electra_cf_set_mem_map(struct pcmcia_socket *s,
		struct pccard_mem_map *map)
		{
		struct electra_cf_socket *cf;

		if (map->card_start)
		return -EINVAL;
		cf = container_of(s, struct electra_cf_socket, socket);
		map->static_start = cf->mem_phys;
		map->flags &= MAP_ACTIVE\|MAP_ATTRIB;
		if (!(map->flags & MAP_ATTRIB))
		map->static_start += 0x800;
		return 0;
		}

		static struct pccard_operations electra_cf_ops = {
		.init = electra_cf_ss_init,
		.get_status = electra_cf_get_status,
		.set_socket = electra_cf_set_socket,
		.set_io_map = electra_cf_set_io_map,
		.set_mem_map = electra_cf_set_mem_map,
		};

		static int __devinit electra_cf_probe(struct of_device *ofdev,
		const struct of_device_id *match)
		{
		struct device *device = &ofdev->dev;
		struct device_node *np = ofdev->node;
		struct electra_cf_socket *cf;
		struct resource mem, io;
		int status;
		const unsigned int *prop;
		int err;
		struct vm_struct *area;

		err = of_address_to_resource(np, 0, &mem);
		if (err)
		return -EINVAL;

		err = of_address_to_resource(np, 1, &io);
		if (err)
		return -EINVAL;

		cf = kzalloc(sizeof *cf, GFP_KERNEL);
		if (!cf)
		return -ENOMEM;

		setup_timer(&cf->timer, electra_cf_timer, (unsigned long)cf);
		cf->irq = NO_IRQ;

		cf->ofdev = ofdev;
		cf->mem_phys = mem.start;
		cf->mem_size = PAGE_ALIGN(mem.end - mem.start);
		cf->mem_base = ioremap(cf->mem_phys, cf->mem_size);
		cf->io_size = PAGE_ALIGN(io.end - io.start);

		area = __get_vm_area(cf->io_size, 0, PHB_IO_BASE, PHB_IO_END);
		if (area == NULL)
		return -ENOMEM;

		cf->io_virt = (void __iomem *)(area->addr);

		cf->gpio_base = ioremap(0xfc103000, 0x1000);
		dev_set_drvdata(device, cf);

		if (!cf->mem_base \|\| !cf->io_virt \|\| !cf->gpio_base \|\|
		(__ioremap_at(io.start, cf->io_virt, cf->io_size,
		_PAGE_NO_CACHE \| _PAGE_GUARDED) == NULL)) {
		dev_err(device, "can't ioremap ranges\n");
		status = -ENOMEM;
		goto fail1;
		}


		cf->io_base = (unsigned long)cf->io_virt - VMALLOC_END;

		cf->iomem.start = (unsigned long)cf->mem_base;
		cf->iomem.end = (unsigned long)cf->mem_base + (mem.end - mem.start);
		cf->iomem.flags = IORESOURCE_MEM;

		cf->irq = irq_of_parse_and_map(np, 0);

		status = request_irq(cf->irq, electra_cf_irq, IRQF_SHARED,
		driver_name, cf);
		if (status < 0) {
		dev_err(device, "request_irq failed\n");
		goto fail1;
		}

		cf->socket.pci_irq = cf->irq;

		prop = of_get_property(np, "card-detect-gpio", NULL);
		if (!prop)
		goto fail1;
		cf->gpio_detect = *prop;

		prop = of_get_property(np, "card-vsense-gpio", NULL);
		if (!prop)
		goto fail1;
		cf->gpio_vsense = *prop;

		prop = of_get_property(np, "card-3v-gpio", NULL);
		if (!prop)
		goto fail1;
		cf->gpio_3v = *prop;

		prop = of_get_property(np, "card-5v-gpio", NULL);
		if (!prop)
		goto fail1;
		cf->gpio_5v = *prop;

		cf->socket.io_offset = cf->io_base;

		/* reserve chip-select regions */
		if (!request_mem_region(cf->mem_phys, cf->mem_size, driver_name)) {
		status = -ENXIO;
		dev_err(device, "Can't claim memory region\n");
		goto fail1;
		}

		if (!request_region(cf->io_base, cf->io_size, driver_name)) {
		status = -ENXIO;
		dev_err(device, "Can't claim I/O region\n");
		goto fail2;
		}

		cf->socket.owner = THIS_MODULE;
		cf->socket.dev.parent = &ofdev->dev;
		cf->socket.ops = &electra_cf_ops;
		cf->socket.resource_ops = &pccard_static_ops;
		cf->socket.features = SS_CAP_PCCARD \| SS_CAP_STATIC_MAP \|
		SS_CAP_MEM_ALIGN;
		cf->socket.map_size = 0x800;

		status = pcmcia_register_socket(&cf->socket);
		if (status < 0) {
		dev_err(device, "pcmcia_register_socket failed\n");
		goto fail3;
		}

		dev_info(device, "at mem 0x%lx io 0x%lx irq %d\n",
		cf->mem_phys, io.start, cf->irq);

		cf->active = 1;
		electra_cf_timer((unsigned long)cf);
		return 0;

		fail3:
		release_region(cf->io_base, cf->io_size);
		fail2:
		release_mem_region(cf->mem_phys, cf->mem_size);
		fail1:
		if (cf->irq != NO_IRQ)
		free_irq(cf->irq, cf);

		if (cf->io_virt)
		__iounmap_at(cf->io_virt, cf->io_size);
		if (cf->mem_base)
		iounmap(cf->mem_base);
		if (cf->gpio_base)
		iounmap(cf->gpio_base);
		device_init_wakeup(&ofdev->dev, 0);
		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);
		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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