drivers/pcmcia/electra_cf.c - linux-4.4 - Gitiles Standalone

 /*
  * 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/mm.h>
 #include <linux/vmalloc.h>
 #include <linux/of_address.h>
 #include <linux/of_irq.h>
 #include <linux/of_platform.h>
 #include <linux/slab.h>

 #include <pcmcia/ss.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 platform_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 electra_cf_probe(struct platform_device *ofdev)
 {
 	struct device *device = &ofdev->dev;
 	struct device_node *np = ofdev->dev.of_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(resource_size(&mem));
 	cf->mem_base = ioremap(cf->mem_phys, cf->mem_size);
 	cf->io_size = PAGE_ALIGN(resource_size(&io));

 	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%llx 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 electra_cf_remove(struct platform_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 const struct of_device_id electra_cf_match[] = {
 	{
 		.compatible   = "electra-cf",
 	},
 	{},
 };
 MODULE_DEVICE_TABLE(of, electra_cf_match);

 static struct platform_driver electra_cf_driver = {
 	.driver = {
 		.name = driver_name,
 		.of_match_table = electra_cf_match,
 	},
 	.probe	  = electra_cf_probe,
 	.remove   = electra_cf_remove,
 };

 module_platform_driver(electra_cf_driver);

 MODULE_LICENSE("GPL");
 MODULE_AUTHOR ("Olof Johansson <olof@lixom.net>");
 MODULE_DESCRIPTION("PA Semi Electra CF driver");
	/*
	* 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/mm.h>
	#include <linux/vmalloc.h>
	#include <linux/of_address.h>
	#include <linux/of_irq.h>
	#include <linux/of_platform.h>
	#include <linux/slab.h>

	#include <pcmcia/ss.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 platform_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 electra_cf_probe(struct platform_device *ofdev)
	{
	struct device *device = &ofdev->dev;
	struct device_node *np = ofdev->dev.of_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(resource_size(&mem));
	cf->mem_base = ioremap(cf->mem_phys, cf->mem_size);
	cf->io_size = PAGE_ALIGN(resource_size(&io));

	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%llx 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 electra_cf_remove(struct platform_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 const struct of_device_id electra_cf_match[] = {
	{
	.compatible = "electra-cf",
	},
	{},
	};
	MODULE_DEVICE_TABLE(of, electra_cf_match);

	static struct platform_driver electra_cf_driver = {
	.driver = {
	.name = driver_name,
	.of_match_table = electra_cf_match,
	},
	.probe = electra_cf_probe,
	.remove = electra_cf_remove,
	};

	module_platform_driver(electra_cf_driver);

	MODULE_LICENSE("GPL");
	MODULE_AUTHOR ("Olof Johansson <olof@lixom.net>");
	MODULE_DESCRIPTION("PA Semi Electra CF driver");