[PATCH] pcmcia: OMAP CF controller (f74e48a5) · Commits · e / devices / android_kernel_fairphone_FP4

drivers/pcmcia/Kconfig

+7 −0

Original line number	Diff line number	Diff line
		@@ -221,6 +221,13 @@ config PCMCIA_VRC4173
		tristate "NEC VRC4173 CARDU support"
		depends on CPU_VR41XX && PCI && PCMCIA

		config OMAP_CF
		tristate "OMAP CompactFlash Controller"
		depends on PCMCIA && ARCH_OMAP16XX
		help
		Say Y here to support the CompactFlash controller on OMAP.
		Note that this doesn't support "True IDE" mode.

		config PCCARD_NONSTATIC
		tristate

drivers/pcmcia/Makefile

+1 −0

Original line number	Diff line number	Diff line
		@@ -34,6 +34,7 @@ obj-$(CONFIG_M32R_CFC) += m32r_cfc.o
		obj-$(CONFIG_PCMCIA_AU1X00) += au1x00_ss.o
		obj-$(CONFIG_PCMCIA_VRC4171) += vrc4171_card.o
		obj-$(CONFIG_PCMCIA_VRC4173) += vrc4173_cardu.o
		obj-$(CONFIG_OMAP_CF) += omap_cf.o

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

drivers/pcmcia/omap_cf.c

0 → 100644

+373 −0

Original line number	Diff line number	Diff line
		/*
		* omap_cf.c -- OMAP 16xx CompactFlash controller driver
		*
		* Copyright (c) 2005 David Brownell
		*
		* 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.
		*/

		#include <linux/module.h>
		#include <linux/kernel.h>
		#include <linux/sched.h>
		#include <linux/device.h>
		#include <linux/errno.h>
		#include <linux/init.h>
		#include <linux/delay.h>
		#include <linux/interrupt.h>

		#include <pcmcia/ss.h>

		#include <asm/hardware.h>
		#include <asm/io.h>
		#include <asm/mach-types.h>
		#include <asm/sizes.h>

		#include <asm/arch/mux.h>
		#include <asm/arch/tc.h>


		/* NOTE: don't expect this to support many I/O cards. The 16xx chips have
		* hard-wired timings to support Compact Flash memory cards; they won't work
		* with various other devices (like WLAN adapters) without some external
		* logic to help out.
		*
		* NOTE: CF controller docs disagree with address space docs as to where
		* CF_BASE really lives; this is a doc erratum.
		*/
		#define CF_BASE 0xfffe2800

		/* status; read after IRQ */
		#define CF_STATUS_REG __REG16(CF_BASE + 0x00)
		# define CF_STATUS_BAD_READ (1 << 2)
		# define CF_STATUS_BAD_WRITE (1 << 1)
		# define CF_STATUS_CARD_DETECT (1 << 0)

		/* which chipselect (CS0..CS3) is used for CF (active low) */
		#define CF_CFG_REG __REG16(CF_BASE + 0x02)

		/* card reset */
		#define CF_CONTROL_REG __REG16(CF_BASE + 0x04)
		# define CF_CONTROL_RESET (1 << 0)

		#define omap_cf_present() (!(CF_STATUS_REG & CF_STATUS_CARD_DETECT))

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

		static const char driver_name[] = "omap_cf";

		struct omap_cf_socket {
		struct pcmcia_socket socket;

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

		struct platform_device *pdev;
		unsigned long phys_cf;
		u_int irq;
		};

		#define POLL_INTERVAL (2 * HZ)

		#define SZ_2K (2 * SZ_1K)

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

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

		/* the timer is primarily to kick this socket's pccardd */
		static void omap_cf_timer(unsigned long _cf)
		{
		struct omap_cf_socket cf = (void ) _cf;
		unsigned present = omap_cf_present();

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

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

		/* This irq handler prevents "irqNNN: nobody cared" messages as drivers
		* claim the card's IRQ. It may also detect some card insertions, but
		* not removals; it can't always eliminate timer irqs.
		*/
		static irqreturn_t omap_cf_irq(int irq, void _cf, struct pt_regs r)
		{
		omap_cf_timer((unsigned long)_cf);
		return IRQ_HANDLED;
		}

		static int omap_cf_get_status(struct pcmcia_socket s, u_int sp)
		{
		if (!sp)
		return -EINVAL;

		/* FIXME power management should probably be board-specific:
		* - 3VCARD vs XVCARD (OSK only handles 3VCARD)
		* - POWERON (switched on/off by set_socket)
		*/
		if (omap_cf_present()) {
		struct omap_cf_socket *cf;

		*sp = SS_READY \| SS_DETECT \| SS_POWERON \| SS_3VCARD;
		cf = container_of(s, struct omap_cf_socket, socket);
		s->irq.AssignedIRQ = cf->irq;
		} else
		*sp = 0;
		return 0;
		}

		static int
		omap_cf_set_socket(struct pcmcia_socket sock, struct socket_state_t s)
		{
		u16 control;

		/* FIXME some non-OSK boards will support power switching */
		switch (s->Vcc) {
		case 0:
		case 33:
		break;
		default:
		return -EINVAL;
		}

		control = CF_CONTROL_REG;
		if (s->flags & SS_RESET)
		CF_CONTROL_REG = CF_CONTROL_RESET;
		else
		CF_CONTROL_REG = 0;

		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 omap_cf_ss_suspend(struct pcmcia_socket *s)
		{
		pr_debug("%s: %s\n", driver_name, __FUNCTION__);
		return omap_cf_set_socket(s, &dead_socket);
		}

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

		static int
		omap_cf_set_io_map(struct pcmcia_socket s, struct pccard_io_map io)
		{
		struct omap_cf_socket *cf;

		cf = container_of(s, struct omap_cf_socket, socket);
		io->flags &= MAP_ACTIVE\|MAP_ATTRIB\|MAP_16BIT;
		io->start = cf->phys_cf + SZ_4K;
		io->stop = io->start + SZ_2K - 1;
		return 0;
		}

		static int
		omap_cf_set_mem_map(struct pcmcia_socket s, struct pccard_mem_map map)
		{
		struct omap_cf_socket *cf;

		if (map->card_start)
		return -EINVAL;
		cf = container_of(s, struct omap_cf_socket, socket);
		map->static_start = cf->phys_cf;
		map->flags &= MAP_ACTIVE\|MAP_ATTRIB\|MAP_16BIT;
		if (map->flags & MAP_ATTRIB)
		map->static_start += SZ_2K;
		return 0;
		}

		static struct pccard_operations omap_cf_ops = {
		.init = omap_cf_ss_init,
		.suspend = omap_cf_ss_suspend,
		.get_status = omap_cf_get_status,
		.set_socket = omap_cf_set_socket,
		.set_io_map = omap_cf_set_io_map,
		.set_mem_map = omap_cf_set_mem_map,
		};

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

		/*
		* NOTE: right now the only board-specific platform_data is
		* "what chipselect is used". Boards could want more.
		*/

		static int __init omap_cf_probe(struct device *dev)
		{
		unsigned seg;
		struct omap_cf_socket *cf;
		struct platform_device *pdev = to_platform_device(dev);
		int irq;
		int status;

		seg = (int) dev->platform_data;
		if (seg == 0 \|\| seg > 3)
		return -ENODEV;

		/* either CFLASH.IREQ (INT_1610_CF) or some GPIO */
		irq = platform_get_irq(pdev, 0);
		if (!irq)
		return -EINVAL;

		cf = kcalloc(1, sizeof *cf, GFP_KERNEL);
		if (!cf)
		return -ENOMEM;
		init_timer(&cf->timer);
		cf->timer.function = omap_cf_timer;
		cf->timer.data = (unsigned long) cf;

		cf->pdev = pdev;
		dev_set_drvdata(dev, cf);

		/* this primarily just shuts up irq handling noise */
		status = request_irq(irq, omap_cf_irq, SA_SHIRQ,
		driver_name, cf);
		if (status < 0)
		goto fail0;
		cf->irq = irq;
		cf->socket.pci_irq = irq;

		switch (seg) {
		/* NOTE: CS0 could be configured too ... */
		case 1:
		cf->phys_cf = OMAP_CS1_PHYS;
		break;
		case 2:
		cf->phys_cf = OMAP_CS2_PHYS;
		break;
		case 3:
		cf->phys_cf = omap_cs3_phys();
		break;
		default:
		goto fail1;
		}

		/* pcmcia layer only remaps "real" memory */
		cf->socket.io_offset = (unsigned long)
		ioremap(cf->phys_cf + SZ_4K, SZ_2K);
		if (!cf->socket.io_offset)
		goto fail1;

		if (!request_mem_region(cf->phys_cf, SZ_8K, driver_name))
		goto fail1;

		/* NOTE: CF conflicts with MMC1 */
		omap_cfg_reg(W11_1610_CF_CD1);
		omap_cfg_reg(P11_1610_CF_CD2);
		omap_cfg_reg(R11_1610_CF_IOIS16);
		omap_cfg_reg(V10_1610_CF_IREQ);
		omap_cfg_reg(W10_1610_CF_RESET);

		CF_CFG_REG = ~(1 << seg);

		pr_info("%s: cs%d on irq %d\n", driver_name, seg, irq);

		/* NOTE: better EMIFS setup might support more cards; but the
		* TRM only shows how to affect regular flash signals, not their
		* CF/PCMCIA variants...
		*/
		pr_debug("%s: cs%d, previous ccs %08x acs %08x\n", driver_name,
		seg, EMIFS_CCS(seg), EMIFS_ACS(seg));
		EMIFS_CCS(seg) = 0x0004a1b3; /* synch mode 4 etc */
		EMIFS_ACS(seg) = 0x00000000; /* OE hold/setup */

		/* CF uses armxor_ck, which is "always" available */

		pr_debug("%s: sts %04x cfg %04x control %04x %s\n", driver_name,
		CF_STATUS_REG, CF_CFG_REG, CF_CONTROL_REG,
		omap_cf_present() ? "present" : "(not present)");

		cf->socket.owner = THIS_MODULE;
		cf->socket.dev.dev = dev;
		cf->socket.ops = &omap_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, SZ_8K);
		fail1:
		free_irq(irq, cf);
		fail0:
		kfree(cf);
		return status;
		}

		static int __devexit omap_cf_remove(struct device *dev)
		{
		struct omap_cf_socket *cf = dev_get_drvdata(dev);

		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, SZ_8K);
		free_irq(cf->irq, cf);
		kfree(cf);
		return 0;
		}

		static int omap_cf_suspend(struct device *dev, pm_message_t mesg, u32 level)
		{
		if (level != SUSPEND_SAVE_STATE)
		return 0;
		return pcmcia_socket_dev_suspend(dev, mesg);
		}

		static int omap_cf_resume(struct device *dev, u32 level)
		{
		if (level != RESUME_RESTORE_STATE)
		return 0;
		return pcmcia_socket_dev_resume(dev);
		}

		static struct device_driver omap_cf_driver = {
		.name = (char *) driver_name,
		.bus = &platform_bus_type,
		.probe = omap_cf_probe,
		.remove = __devexit_p(omap_cf_remove),
		.suspend = omap_cf_suspend,
		.resume = omap_cf_resume,
		};

		static int __init omap_cf_init(void)
		{
		if (cpu_is_omap16xx())
		driver_register(&omap_cf_driver);
		return 0;
		}

		static void __exit omap_cf_exit(void)
		{
		if (cpu_is_omap16xx())
		driver_unregister(&omap_cf_driver);
		}

		module_init(omap_cf_init);
		module_exit(omap_cf_exit);

		MODULE_DESCRIPTION("OMAP CF Driver");
		MODULE_LICENSE("GPL");