Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /*====================================================================== |
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> | |
5a0e3ad6 | 20 | #include <linux/slab.h> |
1da177e4 | 21 | #include <linux/init.h> |
1da177e4 LT |
22 | #include <linux/cpufreq.h> |
23 | #include <linux/ioport.h> | |
24 | #include <linux/kernel.h> | |
25 | #include <linux/spinlock.h> | |
d052d1be | 26 | #include <linux/platform_device.h> |
1da177e4 | 27 | |
a09e64fb | 28 | #include <mach/hardware.h> |
ad68bb9f | 29 | #include <mach/smemc.h> |
1da177e4 LT |
30 | #include <asm/io.h> |
31 | #include <asm/irq.h> | |
32 | #include <asm/system.h> | |
a09e64fb | 33 | #include <mach/pxa2xx-regs.h> |
20f18ff3 | 34 | #include <asm/mach-types.h> |
1da177e4 | 35 | |
1da177e4 | 36 | #include <pcmcia/ss.h> |
1da177e4 LT |
37 | #include <pcmcia/cistpl.h> |
38 | ||
1da177e4 LT |
39 | #include "soc_common.h" |
40 | #include "pxa2xx_base.h" | |
41 | ||
b393c696 EM |
42 | /* |
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 | ||
1da177e4 LT |
80 | |
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 | ||
88 | static 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 | ||
95 | static 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; | |
24d6572b | 99 | return (code / 300000) + ((code % 300000) ? 1 : 0) + 1; |
1da177e4 LT |
100 | } |
101 | ||
102 | static 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 | */ | |
112 | static 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 | ||
118 | static int pxa2xx_pcmcia_set_mcmem( int sock, int speed, int clock ) | |
119 | { | |
ad68bb9f MV |
120 | uint32_t val; |
121 | ||
122 | val = ((pxa2xx_mcxx_setup(speed, clock) | |
1da177e4 LT |
123 | & 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 | ||
ad68bb9f MV |
129 | __raw_writel(val, MCMEM(sock)); |
130 | ||
1da177e4 LT |
131 | return 0; |
132 | } | |
133 | ||
134 | static int pxa2xx_pcmcia_set_mcio( int sock, int speed, int clock ) | |
135 | { | |
ad68bb9f MV |
136 | uint32_t val; |
137 | ||
138 | val = ((pxa2xx_mcxx_setup(speed, clock) | |
1da177e4 LT |
139 | & 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 | ||
ad68bb9f MV |
145 | __raw_writel(val, MCIO(sock)); |
146 | ||
1da177e4 LT |
147 | return 0; |
148 | } | |
149 | ||
150 | static int pxa2xx_pcmcia_set_mcatt( int sock, int speed, int clock ) | |
151 | { | |
ad68bb9f MV |
152 | uint32_t val; |
153 | ||
154 | val = ((pxa2xx_mcxx_setup(speed, clock) | |
1da177e4 LT |
155 | & 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 | ||
ad68bb9f MV |
161 | __raw_writel(val, MCATT(sock)); |
162 | ||
1da177e4 LT |
163 | return 0; |
164 | } | |
165 | ||
166 | static 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 | ||
180 | static int pxa2xx_pcmcia_set_timing(struct soc_pcmcia_socket *skt) | |
181 | { | |
2a125dd5 EM |
182 | unsigned long clk = clk_get_rate(skt->clk); |
183 | return pxa2xx_pcmcia_set_mcxx(skt, clk / 10000); | |
1da177e4 LT |
184 | } |
185 | ||
186 | #ifdef CONFIG_CPU_FREQ | |
187 | ||
188 | static int | |
189 | pxa2xx_pcmcia_frequency_change(struct soc_pcmcia_socket *skt, | |
190 | unsigned long val, | |
191 | struct cpufreq_freqs *freqs) | |
192 | { | |
1da177e4 LT |
193 | 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); | |
d344a21a | 200 | pxa2xx_pcmcia_set_timing(skt); |
1da177e4 LT |
201 | } |
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); | |
d344a21a | 210 | pxa2xx_pcmcia_set_timing(skt); |
1da177e4 LT |
211 | } |
212 | break; | |
213 | } | |
214 | return 0; | |
215 | } | |
216 | #endif | |
217 | ||
5b703683 | 218 | void pxa2xx_configure_sockets(struct device *dev) |
20f18ff3 MZ |
219 | { |
220 | struct pcmcia_low_level *ops = dev->platform_data; | |
20f18ff3 MZ |
221 | /* |
222 | * We have at least one socket, so set MECR:CIT | |
223 | * (Card Is There) | |
224 | */ | |
ad68bb9f | 225 | uint32_t mecr = MECR_CIT; |
20f18ff3 MZ |
226 | |
227 | /* Set MECR:NOS (Number Of Sockets) */ | |
c2de1c38 MZ |
228 | if ((ops->first + ops->nr) > 1 || |
229 | machine_is_viper() || machine_is_arcom_zeus()) | |
ad68bb9f MV |
230 | mecr |= MECR_NOS; |
231 | ||
232 | __raw_writel(mecr, MECR); | |
20f18ff3 | 233 | } |
d5240dfd | 234 | EXPORT_SYMBOL(pxa2xx_configure_sockets); |
20f18ff3 | 235 | |
b393c696 EM |
236 | static const char *skt_names[] = { |
237 | "PCMCIA socket 0", | |
238 | "PCMCIA socket 1", | |
239 | }; | |
240 | ||
241 | #define SKT_DEV_INFO_SIZE(n) \ | |
242 | (sizeof(struct skt_dev_info) + (n)*sizeof(struct soc_pcmcia_socket)) | |
243 | ||
701a5dc0 | 244 | int pxa2xx_drv_pcmcia_add_one(struct soc_pcmcia_socket *skt) |
da4f0073 RKAL |
245 | { |
246 | skt->res_skt.start = _PCMCIA(skt->nr); | |
247 | skt->res_skt.end = _PCMCIA(skt->nr) + PCMCIASp - 1; | |
248 | skt->res_skt.name = skt_names[skt->nr]; | |
249 | skt->res_skt.flags = IORESOURCE_MEM; | |
250 | ||
251 | skt->res_io.start = _PCMCIAIO(skt->nr); | |
252 | skt->res_io.end = _PCMCIAIO(skt->nr) + PCMCIAIOSp - 1; | |
253 | skt->res_io.name = "io"; | |
254 | skt->res_io.flags = IORESOURCE_MEM | IORESOURCE_BUSY; | |
255 | ||
256 | skt->res_mem.start = _PCMCIAMem(skt->nr); | |
257 | skt->res_mem.end = _PCMCIAMem(skt->nr) + PCMCIAMemSp - 1; | |
258 | skt->res_mem.name = "memory"; | |
259 | skt->res_mem.flags = IORESOURCE_MEM; | |
260 | ||
261 | skt->res_attr.start = _PCMCIAAttr(skt->nr); | |
262 | skt->res_attr.end = _PCMCIAAttr(skt->nr) + PCMCIAAttrSp - 1; | |
263 | skt->res_attr.name = "attribute"; | |
264 | skt->res_attr.flags = IORESOURCE_MEM; | |
265 | ||
266 | return soc_pcmcia_add_one(skt); | |
267 | } | |
d0d26c33 | 268 | EXPORT_SYMBOL(pxa2xx_drv_pcmcia_add_one); |
da4f0073 | 269 | |
701a5dc0 RKAL |
270 | void pxa2xx_drv_pcmcia_ops(struct pcmcia_low_level *ops) |
271 | { | |
272 | /* Provide our PXA2xx specific timing routines. */ | |
273 | ops->set_timing = pxa2xx_pcmcia_set_timing; | |
274 | #ifdef CONFIG_CPU_FREQ | |
275 | ops->frequency_change = pxa2xx_pcmcia_frequency_change; | |
276 | #endif | |
277 | } | |
d0d26c33 | 278 | EXPORT_SYMBOL(pxa2xx_drv_pcmcia_ops); |
701a5dc0 | 279 | |
d0d26c33 | 280 | static int pxa2xx_drv_pcmcia_probe(struct platform_device *dev) |
1da177e4 | 281 | { |
701a5dc0 | 282 | int i, ret = 0; |
1da177e4 | 283 | struct pcmcia_low_level *ops; |
b393c696 EM |
284 | struct skt_dev_info *sinfo; |
285 | struct soc_pcmcia_socket *skt; | |
2a125dd5 | 286 | struct clk *clk; |
1da177e4 | 287 | |
d0d26c33 | 288 | ops = (struct pcmcia_low_level *)dev->dev.platform_data; |
a4257af5 MV |
289 | if (!ops) { |
290 | ret = -ENODEV; | |
291 | goto err0; | |
292 | } | |
293 | ||
294 | if (cpu_is_pxa320() && ops->nr > 1) { | |
295 | dev_err(&dev->dev, "pxa320 supports only one pcmcia slot"); | |
296 | ret = -EINVAL; | |
297 | goto err0; | |
298 | } | |
1da177e4 | 299 | |
2a125dd5 EM |
300 | clk = clk_get(&dev->dev, NULL); |
301 | if (!clk) | |
302 | return -ENODEV; | |
303 | ||
701a5dc0 | 304 | pxa2xx_drv_pcmcia_ops(ops); |
da4f0073 | 305 | |
b393c696 | 306 | sinfo = kzalloc(SKT_DEV_INFO_SIZE(ops->nr), GFP_KERNEL); |
2a125dd5 EM |
307 | if (!sinfo) { |
308 | clk_put(clk); | |
b393c696 | 309 | return -ENOMEM; |
2a125dd5 | 310 | } |
b393c696 EM |
311 | |
312 | sinfo->nskt = ops->nr; | |
2a125dd5 | 313 | sinfo->clk = clk; |
b393c696 EM |
314 | |
315 | /* Initialize processor specific parameters */ | |
316 | for (i = 0; i < ops->nr; i++) { | |
317 | skt = &sinfo->skt[i]; | |
318 | ||
da4f0073 | 319 | skt->nr = ops->first + i; |
2a125dd5 | 320 | skt->clk = clk; |
da4f0073 RKAL |
321 | skt->ops = ops; |
322 | skt->socket.owner = ops->owner; | |
a7a5ac58 | 323 | skt->socket.dev.parent = &dev->dev; |
66024db5 | 324 | skt->socket.pci_irq = NO_IRQ; |
b393c696 | 325 | |
da4f0073 RKAL |
326 | ret = pxa2xx_drv_pcmcia_add_one(skt); |
327 | if (ret) | |
a4257af5 | 328 | goto err1; |
b393c696 EM |
329 | } |
330 | ||
da4f0073 RKAL |
331 | if (ret) { |
332 | while (--i >= 0) | |
333 | soc_pcmcia_remove_one(&sinfo->skt[i]); | |
334 | kfree(sinfo); | |
2a125dd5 | 335 | clk_put(clk); |
da4f0073 | 336 | } else { |
a7a5ac58 MZ |
337 | pxa2xx_configure_sockets(&dev->dev); |
338 | dev_set_drvdata(&dev->dev, sinfo); | |
da4f0073 | 339 | } |
1da177e4 | 340 | |
a4257af5 MV |
341 | return 0; |
342 | ||
343 | err1: | |
344 | while (--i >= 0) | |
345 | soc_pcmcia_remove_one(&sinfo->skt[i]); | |
346 | kfree(sinfo); | |
347 | err0: | |
1da177e4 LT |
348 | return ret; |
349 | } | |
9468613b RK |
350 | |
351 | static int pxa2xx_drv_pcmcia_remove(struct platform_device *dev) | |
352 | { | |
be85458e RKAL |
353 | struct skt_dev_info *sinfo = platform_get_drvdata(dev); |
354 | int i; | |
355 | ||
356 | platform_set_drvdata(dev, NULL); | |
357 | ||
358 | for (i = 0; i < sinfo->nskt; i++) | |
359 | soc_pcmcia_remove_one(&sinfo->skt[i]); | |
360 | ||
2a125dd5 | 361 | clk_put(sinfo->clk); |
be85458e RKAL |
362 | kfree(sinfo); |
363 | return 0; | |
9468613b RK |
364 | } |
365 | ||
85c61021 | 366 | static int pxa2xx_drv_pcmcia_resume(struct device *dev) |
1da177e4 | 367 | { |
85c61021 | 368 | pxa2xx_configure_sockets(dev); |
d7646f76 | 369 | return 0; |
1da177e4 LT |
370 | } |
371 | ||
47145210 | 372 | static const struct dev_pm_ops pxa2xx_drv_pcmcia_pm_ops = { |
85c61021 MR |
373 | .resume = pxa2xx_drv_pcmcia_resume, |
374 | }; | |
375 | ||
9468613b | 376 | static struct platform_driver pxa2xx_pcmcia_driver = { |
1da177e4 | 377 | .probe = pxa2xx_drv_pcmcia_probe, |
9468613b | 378 | .remove = pxa2xx_drv_pcmcia_remove, |
9468613b RK |
379 | .driver = { |
380 | .name = "pxa2xx-pcmcia", | |
12c2c019 | 381 | .owner = THIS_MODULE, |
85c61021 | 382 | .pm = &pxa2xx_drv_pcmcia_pm_ops, |
9468613b | 383 | }, |
1da177e4 LT |
384 | }; |
385 | ||
386 | static int __init pxa2xx_pcmcia_init(void) | |
387 | { | |
9468613b | 388 | return platform_driver_register(&pxa2xx_pcmcia_driver); |
1da177e4 LT |
389 | } |
390 | ||
391 | static void __exit pxa2xx_pcmcia_exit(void) | |
392 | { | |
9468613b | 393 | platform_driver_unregister(&pxa2xx_pcmcia_driver); |
1da177e4 LT |
394 | } |
395 | ||
f36598ae | 396 | fs_initcall(pxa2xx_pcmcia_init); |
1da177e4 LT |
397 | module_exit(pxa2xx_pcmcia_exit); |
398 | ||
399 | MODULE_AUTHOR("Stefan Eletzhofer <stefan.eletzhofer@inquant.de> and Ian Molton <spyro@f2s.com>"); | |
400 | MODULE_DESCRIPTION("Linux PCMCIA Card Services: PXA2xx core socket driver"); | |
401 | MODULE_LICENSE("GPL"); | |
12c2c019 | 402 | MODULE_ALIAS("platform:pxa2xx-pcmcia"); |