Message-Id: <1210589200-12431-1-git-send-email-cooloney@kernel.org>
Date:	Mon, 12 May 2008 18:46:40 +0800
From:	Bryan Wu <cooloney@...nel.org>
To:	linux-pcmcia@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc:	Michael Hennerich <michael.hennerich@...log.com>,
	Bryan Wu <cooloney@...nel.org>
Subject: [PATCH 1/1] [PCMCIA]: add support the CF PCMCIA driver for Blackfin

From: Michael Hennerich <michael.hennerich@...log.com>

Signed-off-by: Michael Hennerich <michael.hennerich@...log.com>
Signed-off-by: Bryan Wu <cooloney@...nel.org>
---
 drivers/pcmcia/Kconfig          |    7 +
 drivers/pcmcia/Makefile         |    1 +
 drivers/pcmcia/bfin_cf_pcmcia.c |  324 +++++++++++++++++++++++++++++++++++++++
 include/pcmcia/cs_types.h       |    2 +-
 4 files changed, 333 insertions(+), 1 deletions(-)
 create mode 100644 drivers/pcmcia/bfin_cf_pcmcia.c

diff --git a/drivers/pcmcia/Kconfig b/drivers/pcmcia/Kconfig
index 1b0eb5a..e45402a 100644
--- a/drivers/pcmcia/Kconfig
+++ b/drivers/pcmcia/Kconfig
@@ -263,6 +263,13 @@ config OMAP_CF
 	  Say Y here to support the CompactFlash controller on OMAP.
 	  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
 	tristate "AT91 CompactFlash Controller"
 	depends on PCMCIA && ARCH_AT91RM9200
diff --git a/drivers/pcmcia/Makefile b/drivers/pcmcia/Makefile
index 6f6478b..85c6cc9 100644
--- a/drivers/pcmcia/Makefile
+++ b/drivers/pcmcia/Makefile
@@ -36,6 +36,7 @@ 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
+obj-$(CONFIG_BFIN_CFPCMCIA)			+= bfin_cf_pcmcia.o
 obj-$(CONFIG_AT91_CF)				+= at91_cf.o
 obj-$(CONFIG_ELECTRA_CF)			+= electra_cf.o
 
diff --git a/drivers/pcmcia/bfin_cf_pcmcia.c b/drivers/pcmcia/bfin_cf_pcmcia.c
new file mode 100644
index 0000000..7964675
--- /dev/null
+++ b/drivers/pcmcia/bfin_cf_pcmcia.c
@@ -0,0 +1,324 @@
+/*
+ * file: drivers/pcmcia/bfin_cf.c
+ * author: Michael Hennerich (hennerich@...ckfin.uclinux.org)
+ *
+ * based on: drivers/pcmcia/omap_cf.c
+ * omap_cf.c -- OMAP 16xx CompactFlash controller driver
+ *
+ * Copyright (c) 2005 David Brownell
+ * Copyright (c) 2006 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 <pcmcia/ss.h>
+#include <pcmcia/cisreg.h>
+#include <asm/io.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;
+		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);
+}
+
+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);
+	}
+
+	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 bfin_cf_ss_suspend(struct pcmcia_socket *s)
+{
+	pr_debug("%s: %s\n", driver_name, __FUNCTION__);
+	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 __init bfin_cf_probe(struct device *dev)
+{
+	struct bfin_cf_socket	*cf;
+	struct platform_device	*pdev = to_platform_device(dev);
+	struct resource		*io_mem,*attr_mem;
+	int			irq;
+	unsigned short		cd_pfx;
+	int			status = 0;
+
+	printk(KERN_INFO "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 (cd_pfx > MAX_BLACKFIN_GPIOS)
+		return -EINVAL;
+
+	if (gpio_request(cd_pfx, "pcmcia: CD")) {
+		printk(KERN_ERR "BF5xx flash: Failed ro request Card Detect GPIO_%d\n", cd_pfx);
+		return -EBUSY;
+	}
+	gpio_direction_input(cd_pfx);
+
+	cf = kcalloc(1, sizeof *cf, GFP_KERNEL);
+	if (!cf)
+		return -ENOMEM;
+
+	cf->cd_pfx = cd_pfx;
+
+	init_timer(&cf->timer);
+	cf->timer.function = bfin_cf_timer;
+	cf->timer.data = (unsigned long) cf;
+
+	cf->pdev = pdev;
+	dev_set_drvdata(dev, 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;
+
+	pr_info("%s: on irq %d\n", driver_name, irq);
+
+	pr_debug("%s: %s\n", driver_name, bfin_cf_present(cf->cd_pfx) ? "present" : "(not present)");
+
+	cf->socket.owner = THIS_MODULE;
+	cf->socket.dev.parent = 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:
+	kfree(cf);
+	return status;
+}
+
+static int __devexit bfin_cf_remove(struct device *dev)
+{
+	struct bfin_cf_socket *cf = dev_get_drvdata(dev);
+
+	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);
+	kfree(cf);
+	return 0;
+}
+
+static struct device_driver bfin_cf_driver = {
+	.name		= (char *) driver_name,
+	.bus		= &platform_bus_type,
+	.probe		= bfin_cf_probe,
+	.remove		= __devexit_p(bfin_cf_remove),
+	.suspend 	= pcmcia_socket_dev_suspend,
+	.resume 	= pcmcia_socket_dev_resume,
+};
+
+static int __init bfin_cf_init(void)
+{
+	return driver_register(&bfin_cf_driver);
+}
+
+static void __exit bfin_cf_exit(void)
+{
+	driver_unregister(&bfin_cf_driver);
+}
+
+module_init(bfin_cf_init);
+module_exit(bfin_cf_exit);
+
+MODULE_DESCRIPTION("BFIN CF/PCMCIA Driver");
+MODULE_LICENSE("GPL");
diff --git a/include/pcmcia/cs_types.h b/include/pcmcia/cs_types.h
index 9a6bcc4..c3257c1 100644
--- a/include/pcmcia/cs_types.h
+++ b/include/pcmcia/cs_types.h
@@ -21,7 +21,7 @@
 #include <sys/types.h>
 #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. */
 typedef u_int   ioaddr_t;
 #else
-- 
1.5.5

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Powered by blists - more mailing lists