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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>
32#include <asm/system.h>
Russell Kinga09e64f2008-08-05 16:14:15 +010033#include <mach/pxa2xx-regs.h>
Marc Zyngier20f18ff2008-08-19 12:15:53 +020034#include <asm/mach-types.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070035
Linus Torvalds1da177e2005-04-16 15:20:36 -070036#include <pcmcia/ss.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070037#include <pcmcia/cistpl.h>
38
Linus Torvalds1da177e2005-04-16 15:20:36 -070039#include "soc_common.h"
40#include "pxa2xx_base.h"
41
Eric Miaob393c692009-01-19 17:34:27 +080042/*
43 * Personal Computer Memory Card International Association (PCMCIA) sockets
44 */
45
46#define PCMCIAPrtSp 0x04000000 /* PCMCIA Partition Space [byte] */
47#define PCMCIASp (4*PCMCIAPrtSp) /* PCMCIA Space [byte] */
48#define PCMCIAIOSp PCMCIAPrtSp /* PCMCIA I/O Space [byte] */
49#define PCMCIAAttrSp PCMCIAPrtSp /* PCMCIA Attribute Space [byte] */
50#define PCMCIAMemSp PCMCIAPrtSp /* PCMCIA Memory Space [byte] */
51
52#define PCMCIA0Sp PCMCIASp /* PCMCIA 0 Space [byte] */
53#define PCMCIA0IOSp PCMCIAIOSp /* PCMCIA 0 I/O Space [byte] */
54#define PCMCIA0AttrSp PCMCIAAttrSp /* PCMCIA 0 Attribute Space [byte] */
55#define PCMCIA0MemSp PCMCIAMemSp /* PCMCIA 0 Memory Space [byte] */
56
57#define PCMCIA1Sp PCMCIASp /* PCMCIA 1 Space [byte] */
58#define PCMCIA1IOSp PCMCIAIOSp /* PCMCIA 1 I/O Space [byte] */
59#define PCMCIA1AttrSp PCMCIAAttrSp /* PCMCIA 1 Attribute Space [byte] */
60#define PCMCIA1MemSp PCMCIAMemSp /* PCMCIA 1 Memory Space [byte] */
61
62#define _PCMCIA(Nb) /* PCMCIA [0..1] */ \
63 (0x20000000 + (Nb) * PCMCIASp)
64#define _PCMCIAIO(Nb) _PCMCIA(Nb) /* PCMCIA I/O [0..1] */
65#define _PCMCIAAttr(Nb) /* PCMCIA Attribute [0..1] */ \
66 (_PCMCIA(Nb) + 2 * PCMCIAPrtSp)
67#define _PCMCIAMem(Nb) /* PCMCIA Memory [0..1] */ \
68 (_PCMCIA(Nb) + 3 * PCMCIAPrtSp)
69
70#define _PCMCIA0 _PCMCIA(0) /* PCMCIA 0 */
71#define _PCMCIA0IO _PCMCIAIO(0) /* PCMCIA 0 I/O */
72#define _PCMCIA0Attr _PCMCIAAttr(0) /* PCMCIA 0 Attribute */
73#define _PCMCIA0Mem _PCMCIAMem(0) /* PCMCIA 0 Memory */
74
75#define _PCMCIA1 _PCMCIA(1) /* PCMCIA 1 */
76#define _PCMCIA1IO _PCMCIAIO(1) /* PCMCIA 1 I/O */
77#define _PCMCIA1Attr _PCMCIAAttr(1) /* PCMCIA 1 Attribute */
78#define _PCMCIA1Mem _PCMCIAMem(1) /* PCMCIA 1 Memory */
79
Linus Torvalds1da177e2005-04-16 15:20:36 -070080
81#define MCXX_SETUP_MASK (0x7f)
82#define MCXX_ASST_MASK (0x1f)
83#define MCXX_HOLD_MASK (0x3f)
84#define MCXX_SETUP_SHIFT (0)
85#define MCXX_ASST_SHIFT (7)
86#define MCXX_HOLD_SHIFT (14)
87
88static inline u_int pxa2xx_mcxx_hold(u_int pcmcia_cycle_ns,
89 u_int mem_clk_10khz)
90{
91 u_int code = pcmcia_cycle_ns * mem_clk_10khz;
92 return (code / 300000) + ((code % 300000) ? 1 : 0) - 1;
93}
94
95static inline u_int pxa2xx_mcxx_asst(u_int pcmcia_cycle_ns,
96 u_int mem_clk_10khz)
97{
98 u_int code = pcmcia_cycle_ns * mem_clk_10khz;
Milan Plzik24d65722007-10-16 01:23:49 -070099 return (code / 300000) + ((code % 300000) ? 1 : 0) + 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100}
101
102static inline u_int pxa2xx_mcxx_setup(u_int pcmcia_cycle_ns,
103 u_int mem_clk_10khz)
104{
105 u_int code = pcmcia_cycle_ns * mem_clk_10khz;
106 return (code / 100000) + ((code % 100000) ? 1 : 0) - 1;
107}
108
109/* This function returns the (approximate) command assertion period, in
110 * nanoseconds, for a given CPU clock frequency and MCXX_ASST value:
111 */
112static inline u_int pxa2xx_pcmcia_cmd_time(u_int mem_clk_10khz,
113 u_int pcmcia_mcxx_asst)
114{
115 return (300000 * (pcmcia_mcxx_asst + 1) / mem_clk_10khz);
116}
117
118static int pxa2xx_pcmcia_set_mcmem( int sock, int speed, int clock )
119{
Marek Vasutad68bb92010-11-03 16:29:35 +0100120 uint32_t val;
121
122 val = ((pxa2xx_mcxx_setup(speed, clock)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123 & MCXX_SETUP_MASK) << MCXX_SETUP_SHIFT)
124 | ((pxa2xx_mcxx_asst(speed, clock)
125 & MCXX_ASST_MASK) << MCXX_ASST_SHIFT)
126 | ((pxa2xx_mcxx_hold(speed, clock)
127 & MCXX_HOLD_MASK) << MCXX_HOLD_SHIFT);
128
Marek Vasutad68bb92010-11-03 16:29:35 +0100129 __raw_writel(val, MCMEM(sock));
130
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131 return 0;
132}
133
134static int pxa2xx_pcmcia_set_mcio( int sock, int speed, int clock )
135{
Marek Vasutad68bb92010-11-03 16:29:35 +0100136 uint32_t val;
137
138 val = ((pxa2xx_mcxx_setup(speed, clock)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139 & MCXX_SETUP_MASK) << MCXX_SETUP_SHIFT)
140 | ((pxa2xx_mcxx_asst(speed, clock)
141 & MCXX_ASST_MASK) << MCXX_ASST_SHIFT)
142 | ((pxa2xx_mcxx_hold(speed, clock)
143 & MCXX_HOLD_MASK) << MCXX_HOLD_SHIFT);
144
Marek Vasutad68bb92010-11-03 16:29:35 +0100145 __raw_writel(val, MCIO(sock));
146
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147 return 0;
148}
149
150static int pxa2xx_pcmcia_set_mcatt( int sock, int speed, int clock )
151{
Marek Vasutad68bb92010-11-03 16:29:35 +0100152 uint32_t val;
153
154 val = ((pxa2xx_mcxx_setup(speed, clock)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155 & MCXX_SETUP_MASK) << MCXX_SETUP_SHIFT)
156 | ((pxa2xx_mcxx_asst(speed, clock)
157 & MCXX_ASST_MASK) << MCXX_ASST_SHIFT)
158 | ((pxa2xx_mcxx_hold(speed, clock)
159 & MCXX_HOLD_MASK) << MCXX_HOLD_SHIFT);
160
Marek Vasutad68bb92010-11-03 16:29:35 +0100161 __raw_writel(val, MCATT(sock));
162
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163 return 0;
164}
165
166static int pxa2xx_pcmcia_set_mcxx(struct soc_pcmcia_socket *skt, unsigned int clk)
167{
168 struct soc_pcmcia_timing timing;
169 int sock = skt->nr;
170
171 soc_common_pcmcia_get_timing(skt, &timing);
172
173 pxa2xx_pcmcia_set_mcmem(sock, timing.mem, clk);
174 pxa2xx_pcmcia_set_mcatt(sock, timing.attr, clk);
175 pxa2xx_pcmcia_set_mcio(sock, timing.io, clk);
176
177 return 0;
178}
179
180static int pxa2xx_pcmcia_set_timing(struct soc_pcmcia_socket *skt)
181{
Eric Miao2a125dd2010-11-22 22:48:49 +0800182 unsigned long clk = clk_get_rate(skt->clk);
183 return pxa2xx_pcmcia_set_mcxx(skt, clk / 10000);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184}
185
186#ifdef CONFIG_CPU_FREQ
187
188static int
189pxa2xx_pcmcia_frequency_change(struct soc_pcmcia_socket *skt,
190 unsigned long val,
191 struct cpufreq_freqs *freqs)
192{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193 switch (val) {
194 case CPUFREQ_PRECHANGE:
195 if (freqs->new > freqs->old) {
196 debug(skt, 2, "new frequency %u.%uMHz > %u.%uMHz, "
197 "pre-updating\n",
198 freqs->new / 1000, (freqs->new / 100) % 10,
199 freqs->old / 1000, (freqs->old / 100) % 10);
Marek Vasutd344a212010-06-18 07:48:54 +0200200 pxa2xx_pcmcia_set_timing(skt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201 }
202 break;
203
204 case CPUFREQ_POSTCHANGE:
205 if (freqs->new < freqs->old) {
206 debug(skt, 2, "new frequency %u.%uMHz < %u.%uMHz, "
207 "post-updating\n",
208 freqs->new / 1000, (freqs->new / 100) % 10,
209 freqs->old / 1000, (freqs->old / 100) % 10);
Marek Vasutd344a212010-06-18 07:48:54 +0200210 pxa2xx_pcmcia_set_timing(skt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211 }
212 break;
213 }
214 return 0;
215}
216#endif
217
Marc Zyngier20f18ff2008-08-19 12:15:53 +0200218static void pxa2xx_configure_sockets(struct device *dev)
219{
220 struct pcmcia_low_level *ops = dev->platform_data;
Marc Zyngier20f18ff2008-08-19 12:15:53 +0200221 /*
222 * We have at least one socket, so set MECR:CIT
223 * (Card Is There)
224 */
Marek Vasutad68bb92010-11-03 16:29:35 +0100225 uint32_t mecr = MECR_CIT;
Marc Zyngier20f18ff2008-08-19 12:15:53 +0200226
227 /* Set MECR:NOS (Number Of Sockets) */
Marc Zyngierc2de1c382009-11-14 13:39:13 +0100228 if ((ops->first + ops->nr) > 1 ||
229 machine_is_viper() || machine_is_arcom_zeus())
Marek Vasutad68bb92010-11-03 16:29:35 +0100230 mecr |= MECR_NOS;
231
232 __raw_writel(mecr, MECR);
Marc Zyngier20f18ff2008-08-19 12:15:53 +0200233}
234
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);
300 if (!clk)
301 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 King - ARM Linuxda4f0072009-03-29 19:23:42 +0100320 skt->ops = ops;
321 skt->socket.owner = ops->owner;
Marc Zyngiera7a5ac52009-12-15 21:11:21 +0100322 skt->socket.dev.parent = &dev->dev;
Russell King - ARM Linux66024db2009-03-29 22:45:26 +0100323 skt->socket.pci_irq = NO_IRQ;
Eric Miaob393c692009-01-19 17:34:27 +0800324
Russell King - ARM Linuxda4f0072009-03-29 19:23:42 +0100325 ret = pxa2xx_drv_pcmcia_add_one(skt);
326 if (ret)
Marek Vasuta4257af2010-11-03 16:26:42 +0100327 goto err1;
Eric Miaob393c692009-01-19 17:34:27 +0800328 }
329
Russell King - ARM Linuxda4f0072009-03-29 19:23:42 +0100330 if (ret) {
331 while (--i >= 0)
332 soc_pcmcia_remove_one(&sinfo->skt[i]);
333 kfree(sinfo);
Eric Miao2a125dd2010-11-22 22:48:49 +0800334 clk_put(clk);
Russell King - ARM Linuxda4f0072009-03-29 19:23:42 +0100335 } else {
Marc Zyngiera7a5ac52009-12-15 21:11:21 +0100336 pxa2xx_configure_sockets(&dev->dev);
337 dev_set_drvdata(&dev->dev, sinfo);
Russell King - ARM Linuxda4f0072009-03-29 19:23:42 +0100338 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339
Marek Vasuta4257af2010-11-03 16:26:42 +0100340 return 0;
341
342err1:
343 while (--i >= 0)
344 soc_pcmcia_remove_one(&sinfo->skt[i]);
345 kfree(sinfo);
346err0:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347 return ret;
348}
Russell King94686132006-10-28 22:42:56 +0100349
350static int pxa2xx_drv_pcmcia_remove(struct platform_device *dev)
351{
Russell King - ARM Linuxbe854582009-03-26 22:21:18 +0000352 struct skt_dev_info *sinfo = platform_get_drvdata(dev);
353 int i;
354
355 platform_set_drvdata(dev, NULL);
356
357 for (i = 0; i < sinfo->nskt; i++)
358 soc_pcmcia_remove_one(&sinfo->skt[i]);
359
Eric Miao2a125dd2010-11-22 22:48:49 +0800360 clk_put(sinfo->clk);
Russell King - ARM Linuxbe854582009-03-26 22:21:18 +0000361 kfree(sinfo);
362 return 0;
Russell King94686132006-10-28 22:42:56 +0100363}
364
Mike Rapoport85c61022009-07-29 11:59:25 +0300365static int pxa2xx_drv_pcmcia_resume(struct device *dev)
Russell King94686132006-10-28 22:42:56 +0100366{
Mike Rapoport85c61022009-07-29 11:59:25 +0300367 pxa2xx_configure_sockets(dev);
Dominik Brodowskid7646f72010-03-15 21:46:34 +0100368 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369}
370
Alexey Dobriyan47145212009-12-14 18:00:08 -0800371static const struct dev_pm_ops pxa2xx_drv_pcmcia_pm_ops = {
Mike Rapoport85c61022009-07-29 11:59:25 +0300372 .resume = pxa2xx_drv_pcmcia_resume,
373};
374
Russell King94686132006-10-28 22:42:56 +0100375static struct platform_driver pxa2xx_pcmcia_driver = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700376 .probe = pxa2xx_drv_pcmcia_probe,
Russell King94686132006-10-28 22:42:56 +0100377 .remove = pxa2xx_drv_pcmcia_remove,
Russell King94686132006-10-28 22:42:56 +0100378 .driver = {
379 .name = "pxa2xx-pcmcia",
Kay Sievers12c2c012008-04-15 14:34:34 -0700380 .owner = THIS_MODULE,
Mike Rapoport85c61022009-07-29 11:59:25 +0300381 .pm = &pxa2xx_drv_pcmcia_pm_ops,
Russell King94686132006-10-28 22:42:56 +0100382 },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383};
384
385static int __init pxa2xx_pcmcia_init(void)
386{
Russell King94686132006-10-28 22:42:56 +0100387 return platform_driver_register(&pxa2xx_pcmcia_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388}
389
390static void __exit pxa2xx_pcmcia_exit(void)
391{
Russell King94686132006-10-28 22:42:56 +0100392 platform_driver_unregister(&pxa2xx_pcmcia_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393}
394
Richard Purdief36598ae2005-09-03 19:39:25 +0100395fs_initcall(pxa2xx_pcmcia_init);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700396module_exit(pxa2xx_pcmcia_exit);
397
398MODULE_AUTHOR("Stefan Eletzhofer <stefan.eletzhofer@inquant.de> and Ian Molton <spyro@f2s.com>");
399MODULE_DESCRIPTION("Linux PCMCIA Card Services: PXA2xx core socket driver");
400MODULE_LICENSE("GPL");
Kay Sievers12c2c012008-04-15 14:34:34 -0700401MODULE_ALIAS("platform:pxa2xx-pcmcia");