pcmcia: add support CompactFlash PCMCIA support for Blackfin. (785e821e) · Commits · e / devices / android_kernel_xiaomi_nabu

drivers/pcmcia/Kconfig

+7 −0

Original line number	Original line	Diff line number	Diff line
	@@ -263,6 +263,13 @@ config OMAP_CF
	Say Y here to support the CompactFlash controller on OMAP.		Say Y here to support the CompactFlash controller on OMAP.
	Note that this doesn't support "True IDE" mode.		Note that this doesn't support "True IDE" mode.

			config BFIN_CFPCMCIA
			tristate "Blackfin CompactFlash PCMCIA Driver"
			depends on PCMCIA && BLACKFIN
			help
			Say Y here to support the CompactFlash PCMCIA driver for Blackfin.


	config AT91_CF		config AT91_CF
	tristate "AT91 CompactFlash Controller"		tristate "AT91 CompactFlash Controller"
	depends on PCMCIA && ARCH_AT91RM9200		depends on PCMCIA && ARCH_AT91RM9200

drivers/pcmcia/Makefile

+1 −0

Original line number	Original line	Diff line number	Diff line
	@@ -36,6 +36,7 @@ obj-$(CONFIG_PCMCIA_AU1X00) += au1x00_ss.o
	obj-$(CONFIG_PCMCIA_VRC4171) += vrc4171_card.o		obj-$(CONFIG_PCMCIA_VRC4171) += vrc4171_card.o
	obj-$(CONFIG_PCMCIA_VRC4173) += vrc4173_cardu.o		obj-$(CONFIG_PCMCIA_VRC4173) += vrc4173_cardu.o
	obj-$(CONFIG_OMAP_CF) += omap_cf.o		obj-$(CONFIG_OMAP_CF) += omap_cf.o
			obj-$(CONFIG_BFIN_CFPCMCIA) += bfin_cf_pcmcia.o
	obj-$(CONFIG_AT91_CF) += at91_cf.o		obj-$(CONFIG_AT91_CF) += at91_cf.o
	obj-$(CONFIG_ELECTRA_CF) += electra_cf.o		obj-$(CONFIG_ELECTRA_CF) += electra_cf.o

drivers/pcmcia/bfin_cf_pcmcia.c

0 → 100644

+339 −0

Original line number	Original line	Diff line number	Diff line
			/*
			* file: drivers/pcmcia/bfin_cf.c
			*
			* based on: drivers/pcmcia/omap_cf.c
			* omap_cf.c -- OMAP 16xx CompactFlash controller driver
			*
			* Copyright (c) 2005 David Brownell
			* Copyright (c) 2006-2008 Michael Hennerich Analog Devices Inc.
			*
			* bugs: enter bugs at http://blackfin.uclinux.org/
			*
			* 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, 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; see the file copying.
			* if not, write to the free software foundation,
			* 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/irq.h>
			#include <linux/io.h>

			#include <pcmcia/ss.h>
			#include <pcmcia/cisreg.h>
			#include <asm/gpio.h>

			#define SZ_1K 0x00000400
			#define SZ_8K 0x00002000
			#define SZ_2K (2 * SZ_1K)

			#define POLL_INTERVAL (2 * HZ)

			#define CF_ATASEL_ENA 0x20311802 /* Inverts RESET */
			#define CF_ATASEL_DIS 0x20311800

			#define bfin_cf_present(pfx) (gpio_get_value(pfx))

			/--------------------------------------------------------------------------/

			static const char driver_name[] = "bfin_cf_pcmcia";

			struct bfin_cf_socket {
			struct pcmcia_socket socket;

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

			struct platform_device *pdev;
			unsigned long phys_cf_io;
			unsigned long phys_cf_attr;
			u_int irq;
			u_short cd_pfx;
			};

			/--------------------------------------------------------------------------/
			static int bfin_cf_reset(void)
			{
			outw(0, CF_ATASEL_ENA);
			mdelay(200);
			outw(0, CF_ATASEL_DIS);

			return 0;
			}

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

			/* the timer is primarily to kick this socket's pccardd */
			static void bfin_cf_timer(unsigned long _cf)
			{
			struct bfin_cf_socket cf = (void )_cf;
			unsigned short present = bfin_cf_present(cf->cd_pfx);

			if (present != cf->present) {
			cf->present = present;
			dev_dbg(&cf->pdev->dev, ": card %s\n",
			present ? "present" : "gone");
			pcmcia_parse_events(&cf->socket, SS_DETECT);
			}

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

			static int bfin_cf_get_status(struct pcmcia_socket s, u_int sp)
			{
			struct bfin_cf_socket *cf;

			if (!sp)
			return -EINVAL;

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

			if (bfin_cf_present(cf->cd_pfx)) {
			*sp = SS_READY \| SS_DETECT \| SS_POWERON \| SS_3VCARD;
			s->irq.AssignedIRQ = 0;
			s->pci_irq = cf->irq;

			} else
			*sp = 0;
			return 0;
			}

			static int
			bfin_cf_set_socket(struct pcmcia_socket sock, struct socket_state_t s)
			{

			struct bfin_cf_socket *cf;
			cf = container_of(sock, struct bfin_cf_socket, socket);

			switch (s->Vcc) {
			case 0:
			case 33:
			break;
			case 50:
			break;
			default:
			return -EINVAL;
			}

			if (s->flags & SS_RESET) {
			disable_irq(cf->irq);
			bfin_cf_reset();
			enable_irq(cf->irq);
			}

			dev_dbg(&cf->pdev->dev, ": Vcc %d, io_irq %d, flags %04x csc %04x\n",
			s->Vcc, s->io_irq, s->flags, s->csc_mask);

			return 0;
			}

			static int bfin_cf_ss_suspend(struct pcmcia_socket *s)
			{
			return bfin_cf_set_socket(s, &dead_socket);
			}

			/* regions are 2K each: mem, attrib, io (and reserved-for-ide) */

			static int bfin_cf_set_io_map(struct pcmcia_socket s, struct pccard_io_map io)
			{
			struct bfin_cf_socket *cf;

			cf = container_of(s, struct bfin_cf_socket, socket);
			io->flags &= MAP_ACTIVE \| MAP_ATTRIB \| MAP_16BIT;
			io->start = cf->phys_cf_io;
			io->stop = io->start + SZ_2K - 1;
			return 0;
			}

			static int
			bfin_cf_set_mem_map(struct pcmcia_socket s, struct pccard_mem_map map)
			{
			struct bfin_cf_socket *cf;

			if (map->card_start)
			return -EINVAL;
			cf = container_of(s, struct bfin_cf_socket, socket);
			map->static_start = cf->phys_cf_io;
			map->flags &= MAP_ACTIVE \| MAP_ATTRIB \| MAP_16BIT;
			if (map->flags & MAP_ATTRIB)
			map->static_start = cf->phys_cf_attr;

			return 0;
			}

			static struct pccard_operations bfin_cf_ops = {
			.init = bfin_cf_ss_init,
			.suspend = bfin_cf_ss_suspend,
			.get_status = bfin_cf_get_status,
			.set_socket = bfin_cf_set_socket,
			.set_io_map = bfin_cf_set_io_map,
			.set_mem_map = bfin_cf_set_mem_map,
			};

			/--------------------------------------------------------------------------/

			static int __devinit bfin_cf_probe(struct platform_device *pdev)
			{
			struct bfin_cf_socket *cf;
			struct resource io_mem, attr_mem;
			int irq;
			unsigned short cd_pfx;
			int status = 0;

			dev_info(&pdev->dev, "Blackfin CompactFlash/PCMCIA Socket Driver\n");

			irq = platform_get_irq(pdev, 0);
			if (!irq)
			return -EINVAL;

			cd_pfx = platform_get_irq(pdev, 1); /Card Detect GPIO PIN /

			if (gpio_request(cd_pfx, "pcmcia: CD")) {
			dev_err(&pdev->dev,
			"Failed ro request Card Detect GPIO_%d\n",
			cd_pfx);
			return -EBUSY;
			}
			gpio_direction_input(cd_pfx);

			cf = kzalloc(sizeof *cf, GFP_KERNEL);
			if (!cf) {
			gpio_free(cd_pfx);
			return -ENOMEM;
			}

			cf->cd_pfx = cd_pfx;

			setup_timer(&cf->timer, bfin_cf_timer, (unsigned long)cf);

			cf->pdev = pdev;
			platform_set_drvdata(pdev, cf);

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

			set_irq_type(irq, IRQF_TRIGGER_LOW);

			io_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
			attr_mem = platform_get_resource(pdev, IORESOURCE_MEM, 1);

			if (!io_mem \|\| !attr_mem)
			goto fail0;

			cf->phys_cf_io = io_mem->start;
			cf->phys_cf_attr = attr_mem->start;

			/* pcmcia layer only remaps "real" memory */
			cf->socket.io_offset = (unsigned long)
			ioremap(cf->phys_cf_io, SZ_2K);

			if (!cf->socket.io_offset)
			goto fail0;

			dev_err(&pdev->dev, ": on irq %d\n", irq);

			dev_dbg(&pdev->dev, ": %s\n",
			bfin_cf_present(cf->cd_pfx) ? "present" : "(not present)");

			cf->socket.owner = THIS_MODULE;
			cf->socket.dev.parent = &pdev->dev;
			cf->socket.ops = &bfin_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 = SZ_2K;

			status = pcmcia_register_socket(&cf->socket);
			if (status < 0)
			goto fail2;

			cf->active = 1;
			mod_timer(&cf->timer, jiffies + POLL_INTERVAL);
			return 0;

			fail2:
			iounmap((void __iomem *)cf->socket.io_offset);
			release_mem_region(cf->phys_cf_io, SZ_8K);

			fail0:
			gpio_free(cf->cd_pfx);
			kfree(cf);
			platform_set_drvdata(pdev, NULL);

			return status;
			}

			static int __devexit bfin_cf_remove(struct platform_device *pdev)
			{
			struct bfin_cf_socket *cf = platform_get_drvdata(pdev);

			gpio_free(cf->cd_pfx);
			cf->active = 0;
			pcmcia_unregister_socket(&cf->socket);
			del_timer_sync(&cf->timer);
			iounmap((void __iomem *)cf->socket.io_offset);
			release_mem_region(cf->phys_cf_io, SZ_8K);
			platform_set_drvdata(pdev, NULL);
			kfree(cf);
			return 0;
			}

			static int bfin_cf_suspend(struct platform_device *pdev, pm_message_t mesg)
			{
			return pcmcia_socket_dev_suspend(&pdev->dev, mesg);
			}

			static int bfin_cf_resume(struct platform_device *pdev)
			{
			return pcmcia_socket_dev_resume(&pdev->dev);
			}

			static struct platform_driver bfin_cf_driver = {
			.driver = {
			.name = (char *)driver_name,
			.owner = THIS_MODULE,
			},
			.probe = bfin_cf_probe,
			.remove = __devexit_p(bfin_cf_remove),
			.suspend = bfin_cf_suspend,
			.resume = bfin_cf_resume,
			};

			static int __init bfin_cf_init(void)
			{
			return platform_driver_register(&bfin_cf_driver);
			}

			static void __exit bfin_cf_exit(void)
			{
			platform_driver_unregister(&bfin_cf_driver);
			}

			module_init(bfin_cf_init);
			module_exit(bfin_cf_exit);

			MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>")
			MODULE_DESCRIPTION("BFIN CF/PCMCIA Driver");
			MODULE_LICENSE("GPL");

include/pcmcia/cs_types.h

+2 −1

Original line number	Original line	Diff line number	Diff line
	@@ -21,7 +21,8 @@
	#include <sys/types.h>		#include <sys/types.h>
	#endif		#endif

	#if defined(__arm__) \|\| defined(__mips__) \|\| defined(__avr32__)		#if defined(__arm__) \|\| defined(__mips__) \|\| defined(__avr32__) \|\| \
			defined(__bfin__)
	/* This (ioaddr_t) is exposed to userspace & hence cannot be changed. */		/* This (ioaddr_t) is exposed to userspace & hence cannot be changed. */
	typedef u_int ioaddr_t;		typedef u_int ioaddr_t;
	#else		#else