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19#include <linux/module.h>
20#include <linux/slab.h>
21#include <linux/init.h>
22#include <linux/cpufreq.h>
23#include <linux/ioport.h>
24#include <linux/kernel.h>
25#include <linux/spinlock.h>
26#include <linux/platform_device.h>
27
28#include <mach/hardware.h>
29#include <mach/smemc.h>
30#include <asm/io.h>
31#include <asm/irq.h>
32#include <mach/pxa2xx-regs.h>
33#include <asm/mach-types.h>
34
35#include <pcmcia/ss.h>
36#include <pcmcia/cistpl.h>
37
38#include "soc_common.h"
39#include "pxa2xx_base.h"
40
41
42
43
44
45#define PCMCIAPrtSp 0x04000000
46#define PCMCIASp (4*PCMCIAPrtSp)
47#define PCMCIAIOSp PCMCIAPrtSp
48#define PCMCIAAttrSp PCMCIAPrtSp
49#define PCMCIAMemSp PCMCIAPrtSp
50
51#define PCMCIA0Sp PCMCIASp
52#define PCMCIA0IOSp PCMCIAIOSp
53#define PCMCIA0AttrSp PCMCIAAttrSp
54#define PCMCIA0MemSp PCMCIAMemSp
55
56#define PCMCIA1Sp PCMCIASp
57#define PCMCIA1IOSp PCMCIAIOSp
58#define PCMCIA1AttrSp PCMCIAAttrSp
59#define PCMCIA1MemSp PCMCIAMemSp
60
61#define _PCMCIA(Nb) \
62 (0x20000000 + (Nb) * PCMCIASp)
63#define _PCMCIAIO(Nb) _PCMCIA(Nb)
64#define _PCMCIAAttr(Nb) \
65 (_PCMCIA(Nb) + 2 * PCMCIAPrtSp)
66#define _PCMCIAMem(Nb) \
67 (_PCMCIA(Nb) + 3 * PCMCIAPrtSp)
68
69#define _PCMCIA0 _PCMCIA(0)
70#define _PCMCIA0IO _PCMCIAIO(0)
71#define _PCMCIA0Attr _PCMCIAAttr(0)
72#define _PCMCIA0Mem _PCMCIAMem(0)
73
74#define _PCMCIA1 _PCMCIA(1)
75#define _PCMCIA1IO _PCMCIAIO(1)
76#define _PCMCIA1Attr _PCMCIAAttr(1)
77#define _PCMCIA1Mem _PCMCIAMem(1)
78
79
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;
98 return (code / 300000) + ((code % 300000) ? 1 : 0) + 1;
99}
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
109
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{
119 uint32_t val;
120
121 val = ((pxa2xx_mcxx_setup(speed, clock)
122 & 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
128 __raw_writel(val, MCMEM(sock));
129
130 return 0;
131}
132
133static int pxa2xx_pcmcia_set_mcio( int sock, int speed, int clock )
134{
135 uint32_t val;
136
137 val = ((pxa2xx_mcxx_setup(speed, clock)
138 & 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
144 __raw_writel(val, MCIO(sock));
145
146 return 0;
147}
148
149static int pxa2xx_pcmcia_set_mcatt( int sock, int speed, int clock )
150{
151 uint32_t val;
152
153 val = ((pxa2xx_mcxx_setup(speed, clock)
154 & 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
160 __raw_writel(val, MCATT(sock));
161
162 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{
181 unsigned long clk = clk_get_rate(skt->clk);
182 return pxa2xx_pcmcia_set_mcxx(skt, clk / 10000);
183}
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{
192 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);
199 pxa2xx_pcmcia_set_timing(skt);
200 }
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);
209 pxa2xx_pcmcia_set_timing(skt);
210 }
211 break;
212 }
213 return 0;
214}
215#endif
216
217void pxa2xx_configure_sockets(struct device *dev)
218{
219 struct pcmcia_low_level *ops = dev->platform_data;
220
221
222
223
224 uint32_t mecr = MECR_CIT;
225
226
227 if ((ops->first + ops->nr) > 1 ||
228 machine_is_viper() || machine_is_arcom_zeus())
229 mecr |= MECR_NOS;
230
231 __raw_writel(mecr, MECR);
232}
233EXPORT_SYMBOL(pxa2xx_configure_sockets);
234
235static 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
243int pxa2xx_drv_pcmcia_add_one(struct soc_pcmcia_socket *skt)
244{
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}
267EXPORT_SYMBOL(pxa2xx_drv_pcmcia_add_one);
268
269void pxa2xx_drv_pcmcia_ops(struct pcmcia_low_level *ops)
270{
271
272 ops->set_timing = pxa2xx_pcmcia_set_timing;
273#ifdef CONFIG_CPU_FREQ
274 ops->frequency_change = pxa2xx_pcmcia_frequency_change;
275#endif
276}
277EXPORT_SYMBOL(pxa2xx_drv_pcmcia_ops);
278
279static int pxa2xx_drv_pcmcia_probe(struct platform_device *dev)
280{
281 int i, ret = 0;
282 struct pcmcia_low_level *ops;
283 struct skt_dev_info *sinfo;
284 struct soc_pcmcia_socket *skt;
285 struct clk *clk;
286
287 ops = (struct pcmcia_low_level *)dev->dev.platform_data;
288 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 }
298
299 clk = devm_clk_get(&dev->dev, NULL);
300 if (IS_ERR(clk))
301 return -ENODEV;
302
303 pxa2xx_drv_pcmcia_ops(ops);
304
305 sinfo = devm_kzalloc(&dev->dev, SKT_DEV_INFO_SIZE(ops->nr),
306 GFP_KERNEL);
307 if (!sinfo)
308 return -ENOMEM;
309
310 sinfo->nskt = ops->nr;
311
312
313 for (i = 0; i < ops->nr; i++) {
314 skt = &sinfo->skt[i];
315
316 skt->nr = ops->first + i;
317 skt->clk = clk;
318 soc_pcmcia_init_one(skt, ops, &dev->dev);
319
320 ret = pxa2xx_drv_pcmcia_add_one(skt);
321 if (ret)
322 goto err1;
323 }
324
325 pxa2xx_configure_sockets(&dev->dev);
326 dev_set_drvdata(&dev->dev, sinfo);
327
328 return 0;
329
330err1:
331 while (--i >= 0)
332 soc_pcmcia_remove_one(&sinfo->skt[i]);
333
334err0:
335 return ret;
336}
337
338static int pxa2xx_drv_pcmcia_remove(struct platform_device *dev)
339{
340 struct skt_dev_info *sinfo = platform_get_drvdata(dev);
341 int i;
342
343 for (i = 0; i < sinfo->nskt; i++)
344 soc_pcmcia_remove_one(&sinfo->skt[i]);
345
346 return 0;
347}
348
349static int pxa2xx_drv_pcmcia_resume(struct device *dev)
350{
351 pxa2xx_configure_sockets(dev);
352 return 0;
353}
354
355static const struct dev_pm_ops pxa2xx_drv_pcmcia_pm_ops = {
356 .resume = pxa2xx_drv_pcmcia_resume,
357};
358
359static struct platform_driver pxa2xx_pcmcia_driver = {
360 .probe = pxa2xx_drv_pcmcia_probe,
361 .remove = pxa2xx_drv_pcmcia_remove,
362 .driver = {
363 .name = "pxa2xx-pcmcia",
364 .pm = &pxa2xx_drv_pcmcia_pm_ops,
365 },
366};
367
368static int __init pxa2xx_pcmcia_init(void)
369{
370 return platform_driver_register(&pxa2xx_pcmcia_driver);
371}
372
373static void __exit pxa2xx_pcmcia_exit(void)
374{
375 platform_driver_unregister(&pxa2xx_pcmcia_driver);
376}
377
378fs_initcall(pxa2xx_pcmcia_init);
379module_exit(pxa2xx_pcmcia_exit);
380
381MODULE_AUTHOR("Stefan Eletzhofer <stefan.eletzhofer@inquant.de> and Ian Molton <spyro@f2s.com>");
382MODULE_DESCRIPTION("Linux PCMCIA Card Services: PXA2xx core socket driver");
383MODULE_LICENSE("GPL");
384MODULE_ALIAS("platform:pxa2xx-pcmcia");
385
