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19#include <linux/module.h>
20#include <linux/init.h>
21#include <linux/cpufreq.h>
22#include <linux/ioport.h>
23#include <linux/kernel.h>
24#include <linux/spinlock.h>
25#include <linux/platform_device.h>
26
27#include <mach/hardware.h>
28#include <asm/io.h>
29#include <asm/irq.h>
30#include <asm/system.h>
31#include <mach/pxa2xx-regs.h>
32#include <asm/mach-types.h>
33
34#include <pcmcia/cs_types.h>
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 MCMEM(sock) = ((pxa2xx_mcxx_setup(speed, clock)
120 & MCXX_SETUP_MASK) << MCXX_SETUP_SHIFT)
121 | ((pxa2xx_mcxx_asst(speed, clock)
122 & MCXX_ASST_MASK) << MCXX_ASST_SHIFT)
123 | ((pxa2xx_mcxx_hold(speed, clock)
124 & MCXX_HOLD_MASK) << MCXX_HOLD_SHIFT);
125
126 return 0;
127}
128
129static int pxa2xx_pcmcia_set_mcio( int sock, int speed, int clock )
130{
131 MCIO(sock) = ((pxa2xx_mcxx_setup(speed, clock)
132 & MCXX_SETUP_MASK) << MCXX_SETUP_SHIFT)
133 | ((pxa2xx_mcxx_asst(speed, clock)
134 & MCXX_ASST_MASK) << MCXX_ASST_SHIFT)
135 | ((pxa2xx_mcxx_hold(speed, clock)
136 & MCXX_HOLD_MASK) << MCXX_HOLD_SHIFT);
137
138 return 0;
139}
140
141static int pxa2xx_pcmcia_set_mcatt( int sock, int speed, int clock )
142{
143 MCATT(sock) = ((pxa2xx_mcxx_setup(speed, clock)
144 & MCXX_SETUP_MASK) << MCXX_SETUP_SHIFT)
145 | ((pxa2xx_mcxx_asst(speed, clock)
146 & MCXX_ASST_MASK) << MCXX_ASST_SHIFT)
147 | ((pxa2xx_mcxx_hold(speed, clock)
148 & MCXX_HOLD_MASK) << MCXX_HOLD_SHIFT);
149
150 return 0;
151}
152
153static int pxa2xx_pcmcia_set_mcxx(struct soc_pcmcia_socket *skt, unsigned int clk)
154{
155 struct soc_pcmcia_timing timing;
156 int sock = skt->nr;
157
158 soc_common_pcmcia_get_timing(skt, &timing);
159
160 pxa2xx_pcmcia_set_mcmem(sock, timing.mem, clk);
161 pxa2xx_pcmcia_set_mcatt(sock, timing.attr, clk);
162 pxa2xx_pcmcia_set_mcio(sock, timing.io, clk);
163
164 return 0;
165}
166
167static int pxa2xx_pcmcia_set_timing(struct soc_pcmcia_socket *skt)
168{
169 unsigned int clk = get_memclk_frequency_10khz();
170 return pxa2xx_pcmcia_set_mcxx(skt, clk);
171}
172
173#ifdef CONFIG_CPU_FREQ
174
175static int
176pxa2xx_pcmcia_frequency_change(struct soc_pcmcia_socket *skt,
177 unsigned long val,
178 struct cpufreq_freqs *freqs)
179{
180#warning "it's not clear if this is right since the core CPU (N) clock has no effect on the memory (L) clock"
181 switch (val) {
182 case CPUFREQ_PRECHANGE:
183 if (freqs->new > freqs->old) {
184 debug(skt, 2, "new frequency %u.%uMHz > %u.%uMHz, "
185 "pre-updating\n",
186 freqs->new / 1000, (freqs->new / 100) % 10,
187 freqs->old / 1000, (freqs->old / 100) % 10);
188 pxa2xx_pcmcia_set_mcxx(skt, freqs->new);
189 }
190 break;
191
192 case CPUFREQ_POSTCHANGE:
193 if (freqs->new < freqs->old) {
194 debug(skt, 2, "new frequency %u.%uMHz < %u.%uMHz, "
195 "post-updating\n",
196 freqs->new / 1000, (freqs->new / 100) % 10,
197 freqs->old / 1000, (freqs->old / 100) % 10);
198 pxa2xx_pcmcia_set_mcxx(skt, freqs->new);
199 }
200 break;
201 }
202 return 0;
203}
204#endif
205
206static void pxa2xx_configure_sockets(struct device *dev)
207{
208 struct pcmcia_low_level *ops = dev->platform_data;
209
210
211
212
213
214 MECR |= MECR_CIT;
215
216
217 if ((ops->first + ops->nr) > 1 || machine_is_viper())
218 MECR |= MECR_NOS;
219 else
220 MECR &= ~MECR_NOS;
221}
222
223static const char *skt_names[] = {
224 "PCMCIA socket 0",
225 "PCMCIA socket 1",
226};
227
228#define SKT_DEV_INFO_SIZE(n) \
229 (sizeof(struct skt_dev_info) + (n)*sizeof(struct soc_pcmcia_socket))
230
231int __pxa2xx_drv_pcmcia_probe(struct device *dev)
232{
233 int i, ret;
234 struct pcmcia_low_level *ops;
235 struct skt_dev_info *sinfo;
236 struct soc_pcmcia_socket *skt;
237
238 if (!dev || !dev->platform_data)
239 return -ENODEV;
240
241 ops = (struct pcmcia_low_level *)dev->platform_data;
242
243 sinfo = kzalloc(SKT_DEV_INFO_SIZE(ops->nr), GFP_KERNEL);
244 if (!sinfo)
245 return -ENOMEM;
246
247 sinfo->nskt = ops->nr;
248
249
250 for (i = 0; i < ops->nr; i++) {
251 skt = &sinfo->skt[i];
252
253 skt->nr = ops->first + i;
254 skt->irq = NO_IRQ;
255
256 skt->res_skt.start = _PCMCIA(skt->nr);
257 skt->res_skt.end = _PCMCIA(skt->nr) + PCMCIASp - 1;
258 skt->res_skt.name = skt_names[skt->nr];
259 skt->res_skt.flags = IORESOURCE_MEM;
260
261 skt->res_io.start = _PCMCIAIO(skt->nr);
262 skt->res_io.end = _PCMCIAIO(skt->nr) + PCMCIAIOSp - 1;
263 skt->res_io.name = "io";
264 skt->res_io.flags = IORESOURCE_MEM | IORESOURCE_BUSY;
265
266 skt->res_mem.start = _PCMCIAMem(skt->nr);
267 skt->res_mem.end = _PCMCIAMem(skt->nr) + PCMCIAMemSp - 1;
268 skt->res_mem.name = "memory";
269 skt->res_mem.flags = IORESOURCE_MEM;
270
271 skt->res_attr.start = _PCMCIAAttr(skt->nr);
272 skt->res_attr.end = _PCMCIAAttr(skt->nr) + PCMCIAAttrSp - 1;
273 skt->res_attr.name = "attribute";
274 skt->res_attr.flags = IORESOURCE_MEM;
275 }
276
277
278 ops->set_timing = pxa2xx_pcmcia_set_timing;
279#ifdef CONFIG_CPU_FREQ
280 ops->frequency_change = pxa2xx_pcmcia_frequency_change;
281#endif
282
283 ret = soc_common_drv_pcmcia_probe(dev, ops, sinfo);
284
285 if (!ret)
286 pxa2xx_configure_sockets(dev);
287
288 return ret;
289}
290EXPORT_SYMBOL(__pxa2xx_drv_pcmcia_probe);
291
292
293static int pxa2xx_drv_pcmcia_probe(struct platform_device *dev)
294{
295 return __pxa2xx_drv_pcmcia_probe(&dev->dev);
296}
297
298static int pxa2xx_drv_pcmcia_remove(struct platform_device *dev)
299{
300 return soc_common_drv_pcmcia_remove(&dev->dev);
301}
302
303static int pxa2xx_drv_pcmcia_suspend(struct device *dev)
304{
305 return pcmcia_socket_dev_suspend(dev);
306}
307
308static int pxa2xx_drv_pcmcia_resume(struct device *dev)
309{
310 pxa2xx_configure_sockets(dev);
311 return pcmcia_socket_dev_resume(dev);
312}
313
314static struct dev_pm_ops pxa2xx_drv_pcmcia_pm_ops = {
315 .suspend = pxa2xx_drv_pcmcia_suspend,
316 .resume = pxa2xx_drv_pcmcia_resume,
317};
318
319static struct platform_driver pxa2xx_pcmcia_driver = {
320 .probe = pxa2xx_drv_pcmcia_probe,
321 .remove = pxa2xx_drv_pcmcia_remove,
322 .driver = {
323 .name = "pxa2xx-pcmcia",
324 .owner = THIS_MODULE,
325 .pm = &pxa2xx_drv_pcmcia_pm_ops,
326 },
327};
328
329static int __init pxa2xx_pcmcia_init(void)
330{
331 return platform_driver_register(&pxa2xx_pcmcia_driver);
332}
333
334static void __exit pxa2xx_pcmcia_exit(void)
335{
336 platform_driver_unregister(&pxa2xx_pcmcia_driver);
337}
338
339fs_initcall(pxa2xx_pcmcia_init);
340module_exit(pxa2xx_pcmcia_exit);
341
342MODULE_AUTHOR("Stefan Eletzhofer <stefan.eletzhofer@inquant.de> and Ian Molton <spyro@f2s.com>");
343MODULE_DESCRIPTION("Linux PCMCIA Card Services: PXA2xx core socket driver");
344MODULE_LICENSE("GPL");
345MODULE_ALIAS("platform:pxa2xx-pcmcia");
346
