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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*======================================================================
2
3 Device driver for the PCMCIA control functionality of PXA2xx
4 microprocessors.
5
6 The contents of this file may be used under the
7 terms of the GNU Public License version 2 (the "GPL")
8
9 (c) Ian Molton (spyro@f2s.com) 2003
10 (c) Stefan Eletzhofer (stefan.eletzhofer@inquant.de) 2003,4
11
12 derived from sa11xx_base.c
13
14 Portions created by John G. Dorsey are
15 Copyright (C) 1999 John G. Dorsey.
16
17 ======================================================================*/
18
19#include <linux/module.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090020#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070021#include <linux/init.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070022#include <linux/cpufreq.h>
23#include <linux/ioport.h>
24#include <linux/kernel.h>
25#include <linux/spinlock.h>
Russell Kingd052d1b2005-10-29 19:07:23 +010026#include <linux/platform_device.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070027
Russell Kinga09e64f2008-08-05 16:14:15 +010028#include <mach/hardware.h>
Marek Vasutad68bb92010-11-03 16:29:35 +010029#include <mach/smemc.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070030#include <asm/io.h>
31#include <asm/irq.h>
Russell Kinga09e64f2008-08-05 16:14:15 +010032#include <mach/pxa2xx-regs.h>
Marc Zyngier20f18ff2008-08-19 12:15:53 +020033#include <asm/mach-types.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070034
Linus Torvalds1da177e2005-04-16 15:20:36 -070035#include <pcmcia/ss.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070036#include <pcmcia/cistpl.h>
37
Linus Torvalds1da177e2005-04-16 15:20:36 -070038#include "soc_common.h"
39#include "pxa2xx_base.h"
40
Eric Miaob393c692009-01-19 17:34:27 +080041/*
42 * Personal Computer Memory Card International Association (PCMCIA) sockets
43 */
44
45#define PCMCIAPrtSp 0x04000000 /* PCMCIA Partition Space [byte] */
46#define PCMCIASp (4*PCMCIAPrtSp) /* PCMCIA Space [byte] */
47#define PCMCIAIOSp PCMCIAPrtSp /* PCMCIA I/O Space [byte] */
48#define PCMCIAAttrSp PCMCIAPrtSp /* PCMCIA Attribute Space [byte] */
49#define PCMCIAMemSp PCMCIAPrtSp /* PCMCIA Memory Space [byte] */
50
51#define PCMCIA0Sp PCMCIASp /* PCMCIA 0 Space [byte] */
52#define PCMCIA0IOSp PCMCIAIOSp /* PCMCIA 0 I/O Space [byte] */
53#define PCMCIA0AttrSp PCMCIAAttrSp /* PCMCIA 0 Attribute Space [byte] */
54#define PCMCIA0MemSp PCMCIAMemSp /* PCMCIA 0 Memory Space [byte] */
55
56#define PCMCIA1Sp PCMCIASp /* PCMCIA 1 Space [byte] */
57#define PCMCIA1IOSp PCMCIAIOSp /* PCMCIA 1 I/O Space [byte] */
58#define PCMCIA1AttrSp PCMCIAAttrSp /* PCMCIA 1 Attribute Space [byte] */
59#define PCMCIA1MemSp PCMCIAMemSp /* PCMCIA 1 Memory Space [byte] */
60
61#define _PCMCIA(Nb) /* PCMCIA [0..1] */ \
62 (0x20000000 + (Nb) * PCMCIASp)
63#define _PCMCIAIO(Nb) _PCMCIA(Nb) /* PCMCIA I/O [0..1] */
64#define _PCMCIAAttr(Nb) /* PCMCIA Attribute [0..1] */ \
65 (_PCMCIA(Nb) + 2 * PCMCIAPrtSp)
66#define _PCMCIAMem(Nb) /* PCMCIA Memory [0..1] */ \
67 (_PCMCIA(Nb) + 3 * PCMCIAPrtSp)
68
69#define _PCMCIA0 _PCMCIA(0) /* PCMCIA 0 */
70#define _PCMCIA0IO _PCMCIAIO(0) /* PCMCIA 0 I/O */
71#define _PCMCIA0Attr _PCMCIAAttr(0) /* PCMCIA 0 Attribute */
72#define _PCMCIA0Mem _PCMCIAMem(0) /* PCMCIA 0 Memory */
73
74#define _PCMCIA1 _PCMCIA(1) /* PCMCIA 1 */
75#define _PCMCIA1IO _PCMCIAIO(1) /* PCMCIA 1 I/O */
76#define _PCMCIA1Attr _PCMCIAAttr(1) /* PCMCIA 1 Attribute */
77#define _PCMCIA1Mem _PCMCIAMem(1) /* PCMCIA 1 Memory */
78
Linus Torvalds1da177e2005-04-16 15:20:36 -070079
80#define MCXX_SETUP_MASK (0x7f)
81#define MCXX_ASST_MASK (0x1f)
82#define MCXX_HOLD_MASK (0x3f)
83#define MCXX_SETUP_SHIFT (0)
84#define MCXX_ASST_SHIFT (7)
85#define MCXX_HOLD_SHIFT (14)
86
87static inline u_int pxa2xx_mcxx_hold(u_int pcmcia_cycle_ns,
88 u_int mem_clk_10khz)
89{
90 u_int code = pcmcia_cycle_ns * mem_clk_10khz;
91 return (code / 300000) + ((code % 300000) ? 1 : 0) - 1;
92}
93
94static inline u_int pxa2xx_mcxx_asst(u_int pcmcia_cycle_ns,
95 u_int mem_clk_10khz)
96{
97 u_int code = pcmcia_cycle_ns * mem_clk_10khz;
Milan Plzik24d65722007-10-16 01:23:49 -070098 return (code / 300000) + ((code % 300000) ? 1 : 0) + 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -070099}
100
101static inline u_int pxa2xx_mcxx_setup(u_int pcmcia_cycle_ns,
102 u_int mem_clk_10khz)
103{
104 u_int code = pcmcia_cycle_ns * mem_clk_10khz;
105 return (code / 100000) + ((code % 100000) ? 1 : 0) - 1;
106}
107
108/* This function returns the (approximate) command assertion period, in
109 * nanoseconds, for a given CPU clock frequency and MCXX_ASST value:
110 */
111static inline u_int pxa2xx_pcmcia_cmd_time(u_int mem_clk_10khz,
112 u_int pcmcia_mcxx_asst)
113{
114 return (300000 * (pcmcia_mcxx_asst + 1) / mem_clk_10khz);
115}
116
117static int pxa2xx_pcmcia_set_mcmem( int sock, int speed, int clock )
118{
Marek Vasutad68bb92010-11-03 16:29:35 +0100119 uint32_t val;
120
121 val = ((pxa2xx_mcxx_setup(speed, clock)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122 & MCXX_SETUP_MASK) << MCXX_SETUP_SHIFT)
123 | ((pxa2xx_mcxx_asst(speed, clock)
124 & MCXX_ASST_MASK) << MCXX_ASST_SHIFT)
125 | ((pxa2xx_mcxx_hold(speed, clock)
126 & MCXX_HOLD_MASK) << MCXX_HOLD_SHIFT);
127
Marek Vasutad68bb92010-11-03 16:29:35 +0100128 __raw_writel(val, MCMEM(sock));
129
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130 return 0;
131}
132
133static int pxa2xx_pcmcia_set_mcio( int sock, int speed, int clock )
134{
Marek Vasutad68bb92010-11-03 16:29:35 +0100135 uint32_t val;
136
137 val = ((pxa2xx_mcxx_setup(speed, clock)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138 & MCXX_SETUP_MASK) << MCXX_SETUP_SHIFT)
139 | ((pxa2xx_mcxx_asst(speed, clock)
140 & MCXX_ASST_MASK) << MCXX_ASST_SHIFT)
141 | ((pxa2xx_mcxx_hold(speed, clock)
142 & MCXX_HOLD_MASK) << MCXX_HOLD_SHIFT);
143
Marek Vasutad68bb92010-11-03 16:29:35 +0100144 __raw_writel(val, MCIO(sock));
145
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146 return 0;
147}
148
149static int pxa2xx_pcmcia_set_mcatt( int sock, int speed, int clock )
150{
Marek Vasutad68bb92010-11-03 16:29:35 +0100151 uint32_t val;
152
153 val = ((pxa2xx_mcxx_setup(speed, clock)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154 & MCXX_SETUP_MASK) << MCXX_SETUP_SHIFT)
155 | ((pxa2xx_mcxx_asst(speed, clock)
156 & MCXX_ASST_MASK) << MCXX_ASST_SHIFT)
157 | ((pxa2xx_mcxx_hold(speed, clock)
158 & MCXX_HOLD_MASK) << MCXX_HOLD_SHIFT);
159
Marek Vasutad68bb92010-11-03 16:29:35 +0100160 __raw_writel(val, MCATT(sock));
161
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162 return 0;
163}
164
165static int pxa2xx_pcmcia_set_mcxx(struct soc_pcmcia_socket *skt, unsigned int clk)
166{
167 struct soc_pcmcia_timing timing;
168 int sock = skt->nr;
169
170 soc_common_pcmcia_get_timing(skt, &timing);
171
172 pxa2xx_pcmcia_set_mcmem(sock, timing.mem, clk);
173 pxa2xx_pcmcia_set_mcatt(sock, timing.attr, clk);
174 pxa2xx_pcmcia_set_mcio(sock, timing.io, clk);
175
176 return 0;
177}
178
179static int pxa2xx_pcmcia_set_timing(struct soc_pcmcia_socket *skt)
180{
Eric Miao2a125dd2010-11-22 22:48:49 +0800181 unsigned long clk = clk_get_rate(skt->clk);
182 return pxa2xx_pcmcia_set_mcxx(skt, clk / 10000);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183}
184
185#ifdef CONFIG_CPU_FREQ
186
187static int
188pxa2xx_pcmcia_frequency_change(struct soc_pcmcia_socket *skt,
189 unsigned long val,
190 struct cpufreq_freqs *freqs)
191{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192 switch (val) {
193 case CPUFREQ_PRECHANGE:
194 if (freqs->new > freqs->old) {
195 debug(skt, 2, "new frequency %u.%uMHz > %u.%uMHz, "
196 "pre-updating\n",
197 freqs->new / 1000, (freqs->new / 100) % 10,
198 freqs->old / 1000, (freqs->old / 100) % 10);
Marek Vasutd344a212010-06-18 07:48:54 +0200199 pxa2xx_pcmcia_set_timing(skt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200 }
201 break;
202
203 case CPUFREQ_POSTCHANGE:
204 if (freqs->new < freqs->old) {
205 debug(skt, 2, "new frequency %u.%uMHz < %u.%uMHz, "
206 "post-updating\n",
207 freqs->new / 1000, (freqs->new / 100) % 10,
208 freqs->old / 1000, (freqs->old / 100) % 10);
Marek Vasutd344a212010-06-18 07:48:54 +0200209 pxa2xx_pcmcia_set_timing(skt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210 }
211 break;
212 }
213 return 0;
214}
215#endif
216
Pavel Machek5b703682011-02-04 09:03:43 +0100217void pxa2xx_configure_sockets(struct device *dev)
Marc Zyngier20f18ff2008-08-19 12:15:53 +0200218{
219 struct pcmcia_low_level *ops = dev->platform_data;
Marc Zyngier20f18ff2008-08-19 12:15:53 +0200220 /*
221 * We have at least one socket, so set MECR:CIT
222 * (Card Is There)
223 */
Marek Vasutad68bb92010-11-03 16:29:35 +0100224 uint32_t mecr = MECR_CIT;
Marc Zyngier20f18ff2008-08-19 12:15:53 +0200225
226 /* Set MECR:NOS (Number Of Sockets) */
Marc Zyngierc2de1c382009-11-14 13:39:13 +0100227 if ((ops->first + ops->nr) > 1 ||
228 machine_is_viper() || machine_is_arcom_zeus())
Marek Vasutad68bb92010-11-03 16:29:35 +0100229 mecr |= MECR_NOS;
230
231 __raw_writel(mecr, MECR);
Marc Zyngier20f18ff2008-08-19 12:15:53 +0200232}
Russell Kingd5240df2011-10-27 11:33:15 +0100233EXPORT_SYMBOL(pxa2xx_configure_sockets);
Marc Zyngier20f18ff2008-08-19 12:15:53 +0200234
Eric Miaob393c692009-01-19 17:34:27 +0800235static const char *skt_names[] = {
236 "PCMCIA socket 0",
237 "PCMCIA socket 1",
238};
239
240#define SKT_DEV_INFO_SIZE(n) \
241 (sizeof(struct skt_dev_info) + (n)*sizeof(struct soc_pcmcia_socket))
242
Russell King - ARM Linux701a5dc2009-03-29 19:42:44 +0100243int pxa2xx_drv_pcmcia_add_one(struct soc_pcmcia_socket *skt)
Russell King - ARM Linuxda4f0072009-03-29 19:23:42 +0100244{
245 skt->res_skt.start = _PCMCIA(skt->nr);
246 skt->res_skt.end = _PCMCIA(skt->nr) + PCMCIASp - 1;
247 skt->res_skt.name = skt_names[skt->nr];
248 skt->res_skt.flags = IORESOURCE_MEM;
249
250 skt->res_io.start = _PCMCIAIO(skt->nr);
251 skt->res_io.end = _PCMCIAIO(skt->nr) + PCMCIAIOSp - 1;
252 skt->res_io.name = "io";
253 skt->res_io.flags = IORESOURCE_MEM | IORESOURCE_BUSY;
254
255 skt->res_mem.start = _PCMCIAMem(skt->nr);
256 skt->res_mem.end = _PCMCIAMem(skt->nr) + PCMCIAMemSp - 1;
257 skt->res_mem.name = "memory";
258 skt->res_mem.flags = IORESOURCE_MEM;
259
260 skt->res_attr.start = _PCMCIAAttr(skt->nr);
261 skt->res_attr.end = _PCMCIAAttr(skt->nr) + PCMCIAAttrSp - 1;
262 skt->res_attr.name = "attribute";
263 skt->res_attr.flags = IORESOURCE_MEM;
264
265 return soc_pcmcia_add_one(skt);
266}
Russell Kingd0d26c32009-12-12 10:07:34 +0000267EXPORT_SYMBOL(pxa2xx_drv_pcmcia_add_one);
Russell King - ARM Linuxda4f0072009-03-29 19:23:42 +0100268
Russell King - ARM Linux701a5dc2009-03-29 19:42:44 +0100269void pxa2xx_drv_pcmcia_ops(struct pcmcia_low_level *ops)
270{
271 /* Provide our PXA2xx specific timing routines. */
272 ops->set_timing = pxa2xx_pcmcia_set_timing;
273#ifdef CONFIG_CPU_FREQ
274 ops->frequency_change = pxa2xx_pcmcia_frequency_change;
275#endif
276}
Russell Kingd0d26c32009-12-12 10:07:34 +0000277EXPORT_SYMBOL(pxa2xx_drv_pcmcia_ops);
Russell King - ARM Linux701a5dc2009-03-29 19:42:44 +0100278
Russell Kingd0d26c32009-12-12 10:07:34 +0000279static int pxa2xx_drv_pcmcia_probe(struct platform_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280{
Russell King - ARM Linux701a5dc2009-03-29 19:42:44 +0100281 int i, ret = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282 struct pcmcia_low_level *ops;
Eric Miaob393c692009-01-19 17:34:27 +0800283 struct skt_dev_info *sinfo;
284 struct soc_pcmcia_socket *skt;
Eric Miao2a125dd2010-11-22 22:48:49 +0800285 struct clk *clk;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286
Russell Kingd0d26c32009-12-12 10:07:34 +0000287 ops = (struct pcmcia_low_level *)dev->dev.platform_data;
Marek Vasuta4257af2010-11-03 16:26:42 +0100288 if (!ops) {
289 ret = -ENODEV;
290 goto err0;
291 }
292
293 if (cpu_is_pxa320() && ops->nr > 1) {
294 dev_err(&dev->dev, "pxa320 supports only one pcmcia slot");
295 ret = -EINVAL;
296 goto err0;
297 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700298
Eric Miao2a125dd2010-11-22 22:48:49 +0800299 clk = clk_get(&dev->dev, NULL);
Wei Yongjune09a7162012-09-21 15:19:09 +0800300 if (IS_ERR(clk))
Eric Miao2a125dd2010-11-22 22:48:49 +0800301 return -ENODEV;
302
Russell King - ARM Linux701a5dc2009-03-29 19:42:44 +0100303 pxa2xx_drv_pcmcia_ops(ops);
Russell King - ARM Linuxda4f0072009-03-29 19:23:42 +0100304
Eric Miaob393c692009-01-19 17:34:27 +0800305 sinfo = kzalloc(SKT_DEV_INFO_SIZE(ops->nr), GFP_KERNEL);
Eric Miao2a125dd2010-11-22 22:48:49 +0800306 if (!sinfo) {
307 clk_put(clk);
Eric Miaob393c692009-01-19 17:34:27 +0800308 return -ENOMEM;
Eric Miao2a125dd2010-11-22 22:48:49 +0800309 }
Eric Miaob393c692009-01-19 17:34:27 +0800310
311 sinfo->nskt = ops->nr;
Eric Miao2a125dd2010-11-22 22:48:49 +0800312 sinfo->clk = clk;
Eric Miaob393c692009-01-19 17:34:27 +0800313
314 /* Initialize processor specific parameters */
315 for (i = 0; i < ops->nr; i++) {
316 skt = &sinfo->skt[i];
317
Russell King - ARM Linuxda4f0072009-03-29 19:23:42 +0100318 skt->nr = ops->first + i;
Eric Miao2a125dd2010-11-22 22:48:49 +0800319 skt->clk = clk;
Russell Kinge0d21172011-12-19 14:07:31 +0000320 soc_pcmcia_init_one(skt, ops, &dev->dev);
Eric Miaob393c692009-01-19 17:34:27 +0800321
Russell King - ARM Linuxda4f0072009-03-29 19:23:42 +0100322 ret = pxa2xx_drv_pcmcia_add_one(skt);
323 if (ret)
Marek Vasuta4257af2010-11-03 16:26:42 +0100324 goto err1;
Eric Miaob393c692009-01-19 17:34:27 +0800325 }
326
Axel Lin8fb28232011-12-27 16:25:44 +0800327 pxa2xx_configure_sockets(&dev->dev);
328 dev_set_drvdata(&dev->dev, sinfo);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700329
Marek Vasuta4257af2010-11-03 16:26:42 +0100330 return 0;
331
332err1:
333 while (--i >= 0)
334 soc_pcmcia_remove_one(&sinfo->skt[i]);
Axel Lin8fb28232011-12-27 16:25:44 +0800335 clk_put(clk);
Marek Vasuta4257af2010-11-03 16:26:42 +0100336 kfree(sinfo);
337err0:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338 return ret;
339}
Russell King94686132006-10-28 22:42:56 +0100340
341static int pxa2xx_drv_pcmcia_remove(struct platform_device *dev)
342{
Russell King - ARM Linuxbe854582009-03-26 22:21:18 +0000343 struct skt_dev_info *sinfo = platform_get_drvdata(dev);
344 int i;
345
346 platform_set_drvdata(dev, NULL);
347
348 for (i = 0; i < sinfo->nskt; i++)
349 soc_pcmcia_remove_one(&sinfo->skt[i]);
350
Eric Miao2a125dd2010-11-22 22:48:49 +0800351 clk_put(sinfo->clk);
Russell King - ARM Linuxbe854582009-03-26 22:21:18 +0000352 kfree(sinfo);
353 return 0;
Russell King94686132006-10-28 22:42:56 +0100354}
355
Mike Rapoport85c61022009-07-29 11:59:25 +0300356static int pxa2xx_drv_pcmcia_resume(struct device *dev)
Russell King94686132006-10-28 22:42:56 +0100357{
Mike Rapoport85c61022009-07-29 11:59:25 +0300358 pxa2xx_configure_sockets(dev);
Dominik Brodowskid7646f72010-03-15 21:46:34 +0100359 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360}
361
Alexey Dobriyan47145212009-12-14 18:00:08 -0800362static const struct dev_pm_ops pxa2xx_drv_pcmcia_pm_ops = {
Mike Rapoport85c61022009-07-29 11:59:25 +0300363 .resume = pxa2xx_drv_pcmcia_resume,
364};
365
Russell King94686132006-10-28 22:42:56 +0100366static struct platform_driver pxa2xx_pcmcia_driver = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700367 .probe = pxa2xx_drv_pcmcia_probe,
Russell King94686132006-10-28 22:42:56 +0100368 .remove = pxa2xx_drv_pcmcia_remove,
Russell King94686132006-10-28 22:42:56 +0100369 .driver = {
370 .name = "pxa2xx-pcmcia",
Mike Rapoport85c61022009-07-29 11:59:25 +0300371 .pm = &pxa2xx_drv_pcmcia_pm_ops,
Russell King94686132006-10-28 22:42:56 +0100372 },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700373};
374
375static int __init pxa2xx_pcmcia_init(void)
376{
Russell King94686132006-10-28 22:42:56 +0100377 return platform_driver_register(&pxa2xx_pcmcia_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378}
379
380static void __exit pxa2xx_pcmcia_exit(void)
381{
Russell King94686132006-10-28 22:42:56 +0100382 platform_driver_unregister(&pxa2xx_pcmcia_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383}
384
Richard Purdief36598ae2005-09-03 19:39:25 +0100385fs_initcall(pxa2xx_pcmcia_init);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386module_exit(pxa2xx_pcmcia_exit);
387
388MODULE_AUTHOR("Stefan Eletzhofer <stefan.eletzhofer@inquant.de> and Ian Molton <spyro@f2s.com>");
389MODULE_DESCRIPTION("Linux PCMCIA Card Services: PXA2xx core socket driver");
390MODULE_LICENSE("GPL");
Kay Sievers12c2c012008-04-15 14:34:34 -0700391MODULE_ALIAS("platform:pxa2xx-pcmcia");