[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / pcmcia / sa11xx_base.c

/*======================================================================

    Device driver for the PCMCIA control functionality of StrongARM
    SA-1100 microprocessors.

    The contents of this file are subject to the Mozilla Public
    License Version 1.1 (the "License"); you may not use this file
    except in compliance with the License. You may obtain a copy of
    the License at http://www.mozilla.org/MPL/

    Software distributed under the License is distributed on an "AS
    IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
    implied. See the License for the specific language governing
    rights and limitations under the License.

    The initial developer of the original code is John G. Dorsey
    <john+@cs.cmu.edu>.  Portions created by John G. Dorsey are
    Copyright (C) 1999 John G. Dorsey.  All Rights Reserved.

    Alternatively, the contents of this file may be used under the
    terms of the GNU Public License version 2 (the "GPL"), in which
    case the provisions of the GPL are applicable instead of the
    above.  If you wish to allow the use of your version of this file
    only under the terms of the GPL and not to allow others to use
    your version of this file under the MPL, indicate your decision
    by deleting the provisions above and replace them with the notice
    and other provisions required by the GPL.  If you do not delete
    the provisions above, a recipient may use your version of this
    file under either the MPL or the GPL.

======================================================================*/

#include <linux/module.h>
#include <linux/init.h>
#include <linux/cpufreq.h>
#include <linux/ioport.h>
#include <linux/kernel.h>
#include <linux/spinlock.h>
#include <linux/io.h>

#include <mach/hardware.h>
#include <asm/irq.h>
#include <asm/system.h>

#include "soc_common.h"
#include "sa11xx_base.h"


/*
 * sa1100_pcmcia_default_mecr_timing
 * ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 *
 * Calculate MECR clock wait states for given CPU clock
 * speed and command wait state. This function can be over-
 * written by a board specific version.
 *
 * The default is to simply calculate the BS values as specified in
 * the INTEL SA1100 development manual
 * "Expansion Memory (PCMCIA) Configuration Register (MECR)"
 * that's section 10.2.5 in _my_ version of the manual ;)
 */
static unsigned int
sa1100_pcmcia_default_mecr_timing(struct soc_pcmcia_socket *skt,
				  unsigned int cpu_speed,
				  unsigned int cmd_time)
{
	return sa1100_pcmcia_mecr_bs(cmd_time, cpu_speed);
}

/* sa1100_pcmcia_set_mecr()
 * ^^^^^^^^^^^^^^^^^^^^^^^^
 *
 * set MECR value for socket <sock> based on this sockets
 * io, mem and attribute space access speed.
 * Call board specific BS value calculation to allow boards
 * to tweak the BS values.
 */
static int
sa1100_pcmcia_set_mecr(struct soc_pcmcia_socket *skt, unsigned int cpu_clock)
{
	struct soc_pcmcia_timing timing;
	u32 mecr, old_mecr;
	unsigned long flags;
	unsigned int bs_io, bs_mem, bs_attr;

	soc_common_pcmcia_get_timing(skt, &timing);

	bs_io = skt->ops->get_timing(skt, cpu_clock, timing.io);
	bs_mem = skt->ops->get_timing(skt, cpu_clock, timing.mem);
	bs_attr = skt->ops->get_timing(skt, cpu_clock, timing.attr);

	local_irq_save(flags);

	old_mecr = mecr = MECR;
	MECR_FAST_SET(mecr, skt->nr, 0);
	MECR_BSIO_SET(mecr, skt->nr, bs_io);
	MECR_BSA_SET(mecr, skt->nr, bs_attr);
	MECR_BSM_SET(mecr, skt->nr, bs_mem);
	if (old_mecr != mecr)
		MECR = mecr;

	local_irq_restore(flags);

	debug(skt, 2, "FAST %X  BSM %X  BSA %X  BSIO %X\n",
	      MECR_FAST_GET(mecr, skt->nr),
	      MECR_BSM_GET(mecr, skt->nr), MECR_BSA_GET(mecr, skt->nr),
	      MECR_BSIO_GET(mecr, skt->nr));

	return 0;
}

#ifdef CONFIG_CPU_FREQ
static int
sa1100_pcmcia_frequency_change(struct soc_pcmcia_socket *skt,
			       unsigned long val,
			       struct cpufreq_freqs *freqs)
{
	switch (val) {
	case CPUFREQ_PRECHANGE:
		if (freqs->new > freqs->old)
			sa1100_pcmcia_set_mecr(skt, freqs->new);
		break;

	case CPUFREQ_POSTCHANGE:
		if (freqs->new < freqs->old)
			sa1100_pcmcia_set_mecr(skt, freqs->new);
		break;
	case CPUFREQ_RESUMECHANGE:
		sa1100_pcmcia_set_mecr(skt, freqs->new);
		break;
	}

	return 0;
}

#endif

static int
sa1100_pcmcia_set_timing(struct soc_pcmcia_socket *skt)
{
	return sa1100_pcmcia_set_mecr(skt, cpufreq_get(0));
}

static int
sa1100_pcmcia_show_timing(struct soc_pcmcia_socket *skt, char *buf)
{
	struct soc_pcmcia_timing timing;
	unsigned int clock = cpufreq_get(0);
	unsigned long mecr = MECR;
	char *p = buf;

	soc_common_pcmcia_get_timing(skt, &timing);

	p+=sprintf(p, "I/O      : %u (%u)\n", timing.io,
		   sa1100_pcmcia_cmd_time(clock, MECR_BSIO_GET(mecr, skt->nr)));

	p+=sprintf(p, "attribute: %u (%u)\n", timing.attr,
		   sa1100_pcmcia_cmd_time(clock, MECR_BSA_GET(mecr, skt->nr)));

	p+=sprintf(p, "common   : %u (%u)\n", timing.mem,
		   sa1100_pcmcia_cmd_time(clock, MECR_BSM_GET(mecr, skt->nr)));

	return p - buf;
}

static const char *skt_names[] = {
	"PCMCIA socket 0",
	"PCMCIA socket 1",
};

#define SKT_DEV_INFO_SIZE(n) \
	(sizeof(struct skt_dev_info) + (n)*sizeof(struct soc_pcmcia_socket))

static int sa11xx_drv_pcmcia_add_one(struct soc_pcmcia_socket *skt)
{
	skt->res_skt.start = _PCMCIA(skt->nr);
	skt->res_skt.end = _PCMCIA(skt->nr) + PCMCIASp - 1;
	skt->res_skt.name = skt_names[skt->nr];
	skt->res_skt.flags = IORESOURCE_MEM;

	skt->res_io.start = _PCMCIAIO(skt->nr);
	skt->res_io.end = _PCMCIAIO(skt->nr) + PCMCIAIOSp - 1;
	skt->res_io.name = "io";
	skt->res_io.flags = IORESOURCE_MEM | IORESOURCE_BUSY;

	skt->res_mem.start = _PCMCIAMem(skt->nr);
	skt->res_mem.end = _PCMCIAMem(skt->nr) + PCMCIAMemSp - 1;
	skt->res_mem.name = "memory";
	skt->res_mem.flags = IORESOURCE_MEM;

	skt->res_attr.start = _PCMCIAAttr(skt->nr);
	skt->res_attr.end = _PCMCIAAttr(skt->nr) + PCMCIAAttrSp - 1;
	skt->res_attr.name = "attribute";
	skt->res_attr.flags = IORESOURCE_MEM;

	return soc_pcmcia_add_one(skt);
}

int sa11xx_drv_pcmcia_probe(struct device *dev, struct pcmcia_low_level *ops,
			    int first, int nr)
{
	struct skt_dev_info *sinfo;
	struct soc_pcmcia_socket *skt;
	int i;

	/*
	 * set default MECR calculation if the board specific
	 * code did not specify one...
	 */
	if (!ops->get_timing)
		ops->get_timing = sa1100_pcmcia_default_mecr_timing;

	/* Provide our SA11x0 specific timing routines. */
	ops->set_timing  = sa1100_pcmcia_set_timing;
	ops->show_timing = sa1100_pcmcia_show_timing;
#ifdef CONFIG_CPU_FREQ
	ops->frequency_change = sa1100_pcmcia_frequency_change;
#endif

	sinfo = kzalloc(SKT_DEV_INFO_SIZE(nr), GFP_KERNEL);
	if (!sinfo)
		return -ENOMEM;

	sinfo->nskt = nr;

	/* Initiliaze processor specific parameters */
	for (i = 0; i < nr; i++) {
		skt = &sinfo->skt[i];

		skt->nr = first + i;
		skt->irq = NO_IRQ;
		skt->dev = dev;
		skt->ops = ops;
		skt->socket.owner = ops->owner;
		skt->socket.dev.parent = dev;

		ret = sa11xx_drv_pcmcia_add_one(skt);
		if (ret)
			break;
	}

	if (ret) {
		while (--i >= 0)
			soc_pcmcia_remove_one(&sinfo->skt[i]);
		kfree(sinfo);
	} else {
		dev_set_drvdata(dev, sinfo);
	}

	return ret;
}
EXPORT_SYMBOL(sa11xx_drv_pcmcia_probe);

static int __init sa11xx_pcmcia_init(void)
{
	return 0;
}
fs_initcall(sa11xx_pcmcia_init);

static void __exit sa11xx_pcmcia_exit(void) {}

module_exit(sa11xx_pcmcia_exit);

MODULE_AUTHOR("John Dorsey <john+@cs.cmu.edu>");
MODULE_DESCRIPTION("Linux PCMCIA Card Services: SA-11xx core socket driver");
MODULE_LICENSE("Dual MPL/GPL");
Commit	Line	Data
1da177e4 LT	1	/*======================================================================
	2
	3	Device driver for the PCMCIA control functionality of StrongARM
	4	SA-1100 microprocessors.
	5
	6	The contents of this file are subject to the Mozilla Public
	7	License Version 1.1 (the "License"); you may not use this file
	8	except in compliance with the License. You may obtain a copy of
	9	the License at http://www.mozilla.org/MPL/
	10
	11	Software distributed under the License is distributed on an "AS
	12	IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
	13	implied. See the License for the specific language governing
	14	rights and limitations under the License.
	15
	16	The initial developer of the original code is John G. Dorsey
	17	<john+@cs.cmu.edu>. Portions created by John G. Dorsey are
	18	Copyright (C) 1999 John G. Dorsey. All Rights Reserved.
	19
	20	Alternatively, the contents of this file may be used under the
	21	terms of the GNU Public License version 2 (the "GPL"), in which
	22	case the provisions of the GPL are applicable instead of the
	23	above. If you wish to allow the use of your version of this file
	24	only under the terms of the GPL and not to allow others to use
	25	your version of this file under the MPL, indicate your decision
	26	by deleting the provisions above and replace them with the notice
	27	and other provisions required by the GPL. If you do not delete
	28	the provisions above, a recipient may use your version of this
	29	file under either the MPL or the GPL.
	30
	31	======================================================================*/
	32
	33	#include <linux/module.h>
	34	#include <linux/init.h>
1da177e4 LT	35	#include <linux/cpufreq.h>
	36	#include <linux/ioport.h>
	37	#include <linux/kernel.h>
	38	#include <linux/spinlock.h>
99730225	39	#include <linux/io.h>
1da177e4	40
a09e64fb	41	#include <mach/hardware.h>
1da177e4 LT	42	#include <asm/irq.h>
	43	#include <asm/system.h>
	44
	45	#include "soc_common.h"
	46	#include "sa11xx_base.h"
	47
	48
	49	/*
	50	* sa1100_pcmcia_default_mecr_timing
	51	* ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
	52	*
	53	* Calculate MECR clock wait states for given CPU clock
	54	* speed and command wait state. This function can be over-
	55	* written by a board specific version.
	56	*
	57	* The default is to simply calculate the BS values as specified in
	58	* the INTEL SA1100 development manual
	59	* "Expansion Memory (PCMCIA) Configuration Register (MECR)"
	60	* that's section 10.2.5 in _my_ version of the manual ;)
	61	*/
	62	static unsigned int
	63	sa1100_pcmcia_default_mecr_timing(struct soc_pcmcia_socket *skt,
	64	unsigned int cpu_speed,
	65	unsigned int cmd_time)
	66	{
	67	return sa1100_pcmcia_mecr_bs(cmd_time, cpu_speed);
	68	}
	69
	70	/* sa1100_pcmcia_set_mecr()
	71	* ^^^^^^^^^^^^^^^^^^^^^^^^
	72	*
	73	* set MECR value for socket <sock> based on this sockets
	74	* io, mem and attribute space access speed.
	75	* Call board specific BS value calculation to allow boards
	76	* to tweak the BS values.
	77	*/
	78	static int
	79	sa1100_pcmcia_set_mecr(struct soc_pcmcia_socket *skt, unsigned int cpu_clock)
	80	{
	81	struct soc_pcmcia_timing timing;
	82	u32 mecr, old_mecr;
	83	unsigned long flags;
	84	unsigned int bs_io, bs_mem, bs_attr;
	85
	86	soc_common_pcmcia_get_timing(skt, &timing);
	87
	88	bs_io = skt->ops->get_timing(skt, cpu_clock, timing.io);
	89	bs_mem = skt->ops->get_timing(skt, cpu_clock, timing.mem);
	90	bs_attr = skt->ops->get_timing(skt, cpu_clock, timing.attr);
	91
	92	local_irq_save(flags);
	93
	94	old_mecr = mecr = MECR;
	95	MECR_FAST_SET(mecr, skt->nr, 0);
	96	MECR_BSIO_SET(mecr, skt->nr, bs_io);
	97	MECR_BSA_SET(mecr, skt->nr, bs_attr);
	98	MECR_BSM_SET(mecr, skt->nr, bs_mem);
	99	if (old_mecr != mecr)
	100	MECR = mecr;
	101
	102	local_irq_restore(flags);
	103
	104	debug(skt, 2, "FAST %X BSM %X BSA %X BSIO %X\n",
	105	MECR_FAST_GET(mecr, skt->nr),
106	MECR_BSM_GET(mecr, skt->nr), MECR_BSA_GET(mecr, skt->nr),
107	MECR_BSIO_GET(mecr, skt->nr));
108
109	return 0;
110	}
111
112	#ifdef CONFIG_CPU_FREQ
113	static int
114	sa1100_pcmcia_frequency_change(struct soc_pcmcia_socket *skt,
115	unsigned long val,
116	struct cpufreq_freqs *freqs)
117	{
118	switch (val) {
119	case CPUFREQ_PRECHANGE:
120	if (freqs->new > freqs->old)
121	sa1100_pcmcia_set_mecr(skt, freqs->new);
122	break;
123
124	case CPUFREQ_POSTCHANGE:
125	if (freqs->new < freqs->old)
126	sa1100_pcmcia_set_mecr(skt, freqs->new);
127	break;
128	case CPUFREQ_RESUMECHANGE:
129	sa1100_pcmcia_set_mecr(skt, freqs->new);
130	break;
131	}
132
133	return 0;
134	}
135
136	#endif
137
138	static int
139	sa1100_pcmcia_set_timing(struct soc_pcmcia_socket *skt)
140	{
141	return sa1100_pcmcia_set_mecr(skt, cpufreq_get(0));
142	}
143
144	static int
145	sa1100_pcmcia_show_timing(struct soc_pcmcia_socket skt, char buf)
146	{
147	struct soc_pcmcia_timing timing;
148	unsigned int clock = cpufreq_get(0);
149	unsigned long mecr = MECR;
150	char *p = buf;
151
152	soc_common_pcmcia_get_timing(skt, &timing);
153
154	p+=sprintf(p, "I/O : %u (%u)\n", timing.io,
155	sa1100_pcmcia_cmd_time(clock, MECR_BSIO_GET(mecr, skt->nr)));
156
157	p+=sprintf(p, "attribute: %u (%u)\n", timing.attr,
158	sa1100_pcmcia_cmd_time(clock, MECR_BSA_GET(mecr, skt->nr)));
159
160	p+=sprintf(p, "common : %u (%u)\n", timing.mem,
161	sa1100_pcmcia_cmd_time(clock, MECR_BSM_GET(mecr, skt->nr)));
162
163	return p - buf;
164	}
165
b393c696 EM	166	static const char *skt_names[] = {
	167	"PCMCIA socket 0",
	168	"PCMCIA socket 1",
	169	};
	170
	171	#define SKT_DEV_INFO_SIZE(n) \
	172	(sizeof(struct skt_dev_info) + (n)*sizeof(struct soc_pcmcia_socket))
	173
da4f0073 RKAL	174	static int sa11xx_drv_pcmcia_add_one(struct soc_pcmcia_socket *skt)
	175	{
	176	skt->res_skt.start = _PCMCIA(skt->nr);
	177	skt->res_skt.end = _PCMCIA(skt->nr) + PCMCIASp - 1;
	178	skt->res_skt.name = skt_names[skt->nr];
	179	skt->res_skt.flags = IORESOURCE_MEM;
	180
	181	skt->res_io.start = _PCMCIAIO(skt->nr);
	182	skt->res_io.end = _PCMCIAIO(skt->nr) + PCMCIAIOSp - 1;
	183	skt->res_io.name = "io";
	184	skt->res_io.flags = IORESOURCE_MEM \| IORESOURCE_BUSY;
	185
	186	skt->res_mem.start = _PCMCIAMem(skt->nr);
	187	skt->res_mem.end = _PCMCIAMem(skt->nr) + PCMCIAMemSp - 1;
	188	skt->res_mem.name = "memory";
	189	skt->res_mem.flags = IORESOURCE_MEM;
	190
	191	skt->res_attr.start = _PCMCIAAttr(skt->nr);
	192	skt->res_attr.end = _PCMCIAAttr(skt->nr) + PCMCIAAttrSp - 1;
	193	skt->res_attr.name = "attribute";
	194	skt->res_attr.flags = IORESOURCE_MEM;
	195
	196	return soc_pcmcia_add_one(skt);
	197	}
	198
1da177e4 LT	199	int sa11xx_drv_pcmcia_probe(struct device dev, struct pcmcia_low_level ops,
	200	int first, int nr)
	201	{
b393c696 EM	202	struct skt_dev_info *sinfo;
	203	struct soc_pcmcia_socket *skt;
	204	int i;
	205
1da177e4 LT	206	/*
	207	* set default MECR calculation if the board specific
	208	* code did not specify one...
	209	*/
	210	if (!ops->get_timing)
	211	ops->get_timing = sa1100_pcmcia_default_mecr_timing;
	212
	213	/* Provide our SA11x0 specific timing routines. */
	214	ops->set_timing = sa1100_pcmcia_set_timing;
	215	ops->show_timing = sa1100_pcmcia_show_timing;
	216	#ifdef CONFIG_CPU_FREQ
	217	ops->frequency_change = sa1100_pcmcia_frequency_change;
	218	#endif
	219
da4f0073 RKAL	220	sinfo = kzalloc(SKT_DEV_INFO_SIZE(nr), GFP_KERNEL);
	221	if (!sinfo)
	222	return -ENOMEM;
	223
	224	sinfo->nskt = nr;
	225
	226	/* Initiliaze processor specific parameters */
	227	for (i = 0; i < nr; i++) {
	228	skt = &sinfo->skt[i];
	229
	230	skt->nr = first + i;
	231	skt->irq = NO_IRQ;
	232	skt->dev = dev;
	233	skt->ops = ops;
	234	skt->socket.owner = ops->owner;
	235	skt->socket.dev.parent = dev;
	236
	237	ret = sa11xx_drv_pcmcia_add_one(skt);
	238	if (ret)
	239	break;
	240	}
	241
	242	if (ret) {
	243	while (--i >= 0)
	244	soc_pcmcia_remove_one(&sinfo->skt[i]);
	245	kfree(sinfo);
	246	} else {
	247	dev_set_drvdata(dev, sinfo);
	248	}
	249
	250	return ret;
1da177e4 LT	251	}
	252	EXPORT_SYMBOL(sa11xx_drv_pcmcia_probe);
	253
	254	static int __init sa11xx_pcmcia_init(void)
	255	{
	256	return 0;
	257	}
f36598ae	258	fs_initcall(sa11xx_pcmcia_init);
1da177e4 LT	259
	260	static void __exit sa11xx_pcmcia_exit(void) {}
	261
	262	module_exit(sa11xx_pcmcia_exit);
	263
	264	MODULE_AUTHOR("John Dorsey <john+@cs.cmu.edu>");
	265	MODULE_DESCRIPTION("Linux PCMCIA Card Services: SA-11xx core socket driver");
	266	MODULE_LICENSE("Dual MPL/GPL");