[linux-2.6-block.git] / drivers / pcmcia / omap_cf.c

/*
 * 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");
Commit	Line	Data
f74e48a5 DB	1	/*
	2	* omap_cf.c -- OMAP 16xx CompactFlash controller driver
	3	*
	4	* Copyright (c) 2005 David Brownell
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation; either version 2 of the License, or
	9	* (at your option) any later version.
	10	*/
	11
	12	#include <linux/module.h>
	13	#include <linux/kernel.h>
	14	#include <linux/sched.h>
	15	#include <linux/device.h>
	16	#include <linux/errno.h>
	17	#include <linux/init.h>
	18	#include <linux/delay.h>
	19	#include <linux/interrupt.h>
	20
	21	#include <pcmcia/ss.h>
	22
	23	#include <asm/hardware.h>
	24	#include <asm/io.h>
	25	#include <asm/mach-types.h>
	26	#include <asm/sizes.h>
	27
	28	#include <asm/arch/mux.h>
	29	#include <asm/arch/tc.h>
	30
	31
	32	/* NOTE: don't expect this to support many I/O cards. The 16xx chips have
	33	* hard-wired timings to support Compact Flash memory cards; they won't work
	34	* with various other devices (like WLAN adapters) without some external
	35	* logic to help out.
	36	*
	37	* NOTE: CF controller docs disagree with address space docs as to where
	38	* CF_BASE really lives; this is a doc erratum.
	39	*/
	40	#define CF_BASE 0xfffe2800
	41
	42	/* status; read after IRQ */
	43	#define CF_STATUS_REG __REG16(CF_BASE + 0x00)
	44	# define CF_STATUS_BAD_READ (1 << 2)
	45	# define CF_STATUS_BAD_WRITE (1 << 1)
	46	# define CF_STATUS_CARD_DETECT (1 << 0)
	47
	48	/* which chipselect (CS0..CS3) is used for CF (active low) */
	49	#define CF_CFG_REG __REG16(CF_BASE + 0x02)
	50
	51	/* card reset */
	52	#define CF_CONTROL_REG __REG16(CF_BASE + 0x04)
	53	# define CF_CONTROL_RESET (1 << 0)
	54
	55	#define omap_cf_present() (!(CF_STATUS_REG & CF_STATUS_CARD_DETECT))
	56
	57	/--------------------------------------------------------------------------/
	58
	59	static const char driver_name[] = "omap_cf";
	60
	61	struct omap_cf_socket {
	62	struct pcmcia_socket socket;
	63
	64	struct timer_list timer;
65	unsigned present:1;
66	unsigned active:1;
67
68	struct platform_device *pdev;
69	unsigned long phys_cf;
70	u_int irq;
71	};
72
73	#define POLL_INTERVAL (2 * HZ)
74
75	#define SZ_2K (2 * SZ_1K)
76
77	/--------------------------------------------------------------------------/
78
79	static int omap_cf_ss_init(struct pcmcia_socket *s)
80	{
81	return 0;
82	}
83
84	/* the timer is primarily to kick this socket's pccardd */
85	static void omap_cf_timer(unsigned long _cf)
86	{
87	struct omap_cf_socket cf = (void ) _cf;
88	unsigned present = omap_cf_present();
89
90	if (present != cf->present) {
91	cf->present = present;
92	pr_debug("%s: card %s\n", driver_name,
93	present ? "present" : "gone");
94	pcmcia_parse_events(&cf->socket, SS_DETECT);
95	}
96
97	if (cf->active)
98	mod_timer(&cf->timer, jiffies + POLL_INTERVAL);
99	}
100
101	/* This irq handler prevents "irqNNN: nobody cared" messages as drivers
102	* claim the card's IRQ. It may also detect some card insertions, but
103	* not removals; it can't always eliminate timer irqs.
104	*/
105	static irqreturn_t omap_cf_irq(int irq, void _cf, struct pt_regs r)
106	{
107	omap_cf_timer((unsigned long)_cf);
108	return IRQ_HANDLED;
109	}
110
111	static int omap_cf_get_status(struct pcmcia_socket s, u_int sp)
112	{
113	if (!sp)
114	return -EINVAL;
115
116	/* FIXME power management should probably be board-specific:
117	* - 3VCARD vs XVCARD (OSK only handles 3VCARD)
118	* - POWERON (switched on/off by set_socket)
119	*/
120	if (omap_cf_present()) {
121	struct omap_cf_socket *cf;
122
123	*sp = SS_READY \| SS_DETECT \| SS_POWERON \| SS_3VCARD;
124	cf = container_of(s, struct omap_cf_socket, socket);
125	s->irq.AssignedIRQ = cf->irq;
126	} else
127	*sp = 0;
128	return 0;
129	}
130
131	static int
132	omap_cf_set_socket(struct pcmcia_socket sock, struct socket_state_t s)
133	{
134	u16 control;
135
136	/* FIXME some non-OSK boards will support power switching */
137	switch (s->Vcc) {
138	case 0:
139	case 33:
140	break;
141	default:
142	return -EINVAL;
143	}
144
145	control = CF_CONTROL_REG;
146	if (s->flags & SS_RESET)
147	CF_CONTROL_REG = CF_CONTROL_RESET;
148	else
149	CF_CONTROL_REG = 0;
150
151	pr_debug("%s: Vcc %d, io_irq %d, flags %04x csc %04x\n",
152	driver_name, s->Vcc, s->io_irq, s->flags, s->csc_mask);
153
154	return 0;
155	}
156
157	static int omap_cf_ss_suspend(struct pcmcia_socket *s)
158	{
159	pr_debug("%s: %s\n", driver_name, __FUNCTION__);
160	return omap_cf_set_socket(s, &dead_socket);
161	}
162
163	/* regions are 2K each: mem, attrib, io (and reserved-for-ide) */
164
165	static int
166	omap_cf_set_io_map(struct pcmcia_socket s, struct pccard_io_map io)
167	{
168	struct omap_cf_socket *cf;
169
170	cf = container_of(s, struct omap_cf_socket, socket);
171	io->flags &= MAP_ACTIVE\|MAP_ATTRIB\|MAP_16BIT;
172	io->start = cf->phys_cf + SZ_4K;
173	io->stop = io->start + SZ_2K - 1;
174	return 0;
175	}
176
177	static int
178	omap_cf_set_mem_map(struct pcmcia_socket s, struct pccard_mem_map map)
179	{
180	struct omap_cf_socket *cf;
181
182	if (map->card_start)
183	return -EINVAL;
184	cf = container_of(s, struct omap_cf_socket, socket);
185	map->static_start = cf->phys_cf;
186	map->flags &= MAP_ACTIVE\|MAP_ATTRIB\|MAP_16BIT;
187	if (map->flags & MAP_ATTRIB)
188	map->static_start += SZ_2K;
189	return 0;
190	}
191
192	static struct pccard_operations omap_cf_ops = {
193	.init = omap_cf_ss_init,
194	.suspend = omap_cf_ss_suspend,
195	.get_status = omap_cf_get_status,
196	.set_socket = omap_cf_set_socket,
197	.set_io_map = omap_cf_set_io_map,
198	.set_mem_map = omap_cf_set_mem_map,
199	};
200
201	/--------------------------------------------------------------------------/
202
203	/*
204	* NOTE: right now the only board-specific platform_data is
205	* "what chipselect is used". Boards could want more.
206	*/
207
208	static int __init omap_cf_probe(struct device *dev)
209	{
210	unsigned seg;
211	struct omap_cf_socket *cf;
212	struct platform_device *pdev = to_platform_device(dev);
213	int irq;
214	int status;
215
216	seg = (int) dev->platform_data;
217	if (seg == 0 \|\| seg > 3)
218	return -ENODEV;
219
220	/* either CFLASH.IREQ (INT_1610_CF) or some GPIO */
221	irq = platform_get_irq(pdev, 0);
222	if (!irq)
223	return -EINVAL;
224
225	cf = kcalloc(1, sizeof *cf, GFP_KERNEL);
226	if (!cf)
227	return -ENOMEM;
228	init_timer(&cf->timer);
229	cf->timer.function = omap_cf_timer;
230	cf->timer.data = (unsigned long) cf;
231
232	cf->pdev = pdev;
233	dev_set_drvdata(dev, cf);
234
235	/* this primarily just shuts up irq handling noise */
236	status = request_irq(irq, omap_cf_irq, SA_SHIRQ,
237	driver_name, cf);
238	if (status < 0)
239	goto fail0;
240	cf->irq = irq;
241	cf->socket.pci_irq = irq;
242
243	switch (seg) {
244	/* NOTE: CS0 could be configured too ... */
245	case 1:
246	cf->phys_cf = OMAP_CS1_PHYS;
247	break;
248	case 2:
249	cf->phys_cf = OMAP_CS2_PHYS;
250	break;
251	case 3:
252	cf->phys_cf = omap_cs3_phys();
253	break;
254	default:
255	goto fail1;
256	}
257
258	/* pcmcia layer only remaps "real" memory */
259	cf->socket.io_offset = (unsigned long)
260	ioremap(cf->phys_cf + SZ_4K, SZ_2K);
261	if (!cf->socket.io_offset)
262	goto fail1;
263
264	if (!request_mem_region(cf->phys_cf, SZ_8K, driver_name))
265	goto fail1;
266
267	/* NOTE: CF conflicts with MMC1 */
268	omap_cfg_reg(W11_1610_CF_CD1);
269	omap_cfg_reg(P11_1610_CF_CD2);
270	omap_cfg_reg(R11_1610_CF_IOIS16);
271	omap_cfg_reg(V10_1610_CF_IREQ);
272	omap_cfg_reg(W10_1610_CF_RESET);
273
274	CF_CFG_REG = ~(1 << seg);
275
276	pr_info("%s: cs%d on irq %d\n", driver_name, seg, irq);
277
278	/* NOTE: better EMIFS setup might support more cards; but the
279	* TRM only shows how to affect regular flash signals, not their
280	* CF/PCMCIA variants...
281	*/
282	pr_debug("%s: cs%d, previous ccs %08x acs %08x\n", driver_name,
283	seg, EMIFS_CCS(seg), EMIFS_ACS(seg));
284	EMIFS_CCS(seg) = 0x0004a1b3; /* synch mode 4 etc */
285	EMIFS_ACS(seg) = 0x00000000; /* OE hold/setup */
286
287	/* CF uses armxor_ck, which is "always" available */
288
289	pr_debug("%s: sts %04x cfg %04x control %04x %s\n", driver_name,
290	CF_STATUS_REG, CF_CFG_REG, CF_CONTROL_REG,
291	omap_cf_present() ? "present" : "(not present)");
292
293	cf->socket.owner = THIS_MODULE;
294	cf->socket.dev.dev = dev;
295	cf->socket.ops = &omap_cf_ops;
296	cf->socket.resource_ops = &pccard_static_ops;
297	cf->socket.features = SS_CAP_PCCARD \| SS_CAP_STATIC_MAP
298	\| SS_CAP_MEM_ALIGN;
299	cf->socket.map_size = SZ_2K;
300
301	status = pcmcia_register_socket(&cf->socket);
302	if (status < 0)
303	goto fail2;
304
305	cf->active = 1;
306	mod_timer(&cf->timer, jiffies + POLL_INTERVAL);
307	return 0;
308
309	fail2:
310	iounmap((void __iomem *) cf->socket.io_offset);
311	release_mem_region(cf->phys_cf, SZ_8K);
312	fail1:
313	free_irq(irq, cf);
314	fail0:
315	kfree(cf);
316	return status;
317	}
318
319	static int __devexit omap_cf_remove(struct device *dev)
320	{
321	struct omap_cf_socket *cf = dev_get_drvdata(dev);
322
323	cf->active = 0;
324	pcmcia_unregister_socket(&cf->socket);
325	del_timer_sync(&cf->timer);
326	iounmap((void __iomem *) cf->socket.io_offset);
327	release_mem_region(cf->phys_cf, SZ_8K);
328	free_irq(cf->irq, cf);
329	kfree(cf);
330	return 0;
331	}
332
333	static int omap_cf_suspend(struct device *dev, pm_message_t mesg, u32 level)
334	{
335	if (level != SUSPEND_SAVE_STATE)
336	return 0;
337	return pcmcia_socket_dev_suspend(dev, mesg);
338	}
339
340	static int omap_cf_resume(struct device *dev, u32 level)
341	{
342	if (level != RESUME_RESTORE_STATE)
343	return 0;
344	return pcmcia_socket_dev_resume(dev);
345	}
346
347	static struct device_driver omap_cf_driver = {
348	.name = (char *) driver_name,
349	.bus = &platform_bus_type,
350	.probe = omap_cf_probe,
351	.remove = __devexit_p(omap_cf_remove),
352	.suspend = omap_cf_suspend,
353	.resume = omap_cf_resume,
354	};
355
356	static int __init omap_cf_init(void)
357	{
358	if (cpu_is_omap16xx())
359	driver_register(&omap_cf_driver);
360	return 0;
361	}
362
363	static void __exit omap_cf_exit(void)
364	{
365	if (cpu_is_omap16xx())
366	driver_unregister(&omap_cf_driver);
367	}
368
369	module_init(omap_cf_init);
370	module_exit(omap_cf_exit);
371
372	MODULE_DESCRIPTION("OMAP CF Driver");
373	MODULE_LICENSE("GPL");