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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/pxa-regs.h>
32#include <mach/pxa2xx-regs.h>
33
34#include <pcmcia/cs_types.h>
35#include <pcmcia/ss.h>
36#include <pcmcia/cistpl.h>
37
38#include "cs_internal.h"
39#include "soc_common.h"
40#include "pxa2xx_base.h"
41
42
43#define MCXX_SETUP_MASK (0x7f)
44#define MCXX_ASST_MASK (0x1f)
45#define MCXX_HOLD_MASK (0x3f)
46#define MCXX_SETUP_SHIFT (0)
47#define MCXX_ASST_SHIFT (7)
48#define MCXX_HOLD_SHIFT (14)
49
50static inline u_int pxa2xx_mcxx_hold(u_int pcmcia_cycle_ns,
51 u_int mem_clk_10khz)
52{
53 u_int code = pcmcia_cycle_ns * mem_clk_10khz;
54 return (code / 300000) + ((code % 300000) ? 1 : 0) - 1;
55}
56
57static inline u_int pxa2xx_mcxx_asst(u_int pcmcia_cycle_ns,
58 u_int mem_clk_10khz)
59{
60 u_int code = pcmcia_cycle_ns * mem_clk_10khz;
61 return (code / 300000) + ((code % 300000) ? 1 : 0) + 1;
62}
63
64static inline u_int pxa2xx_mcxx_setup(u_int pcmcia_cycle_ns,
65 u_int mem_clk_10khz)
66{
67 u_int code = pcmcia_cycle_ns * mem_clk_10khz;
68 return (code / 100000) + ((code % 100000) ? 1 : 0) - 1;
69}
70
71
72
73
74static inline u_int pxa2xx_pcmcia_cmd_time(u_int mem_clk_10khz,
75 u_int pcmcia_mcxx_asst)
76{
77 return (300000 * (pcmcia_mcxx_asst + 1) / mem_clk_10khz);
78}
79
80static int pxa2xx_pcmcia_set_mcmem( int sock, int speed, int clock )
81{
82 MCMEM(sock) = ((pxa2xx_mcxx_setup(speed, clock)
83 & MCXX_SETUP_MASK) << MCXX_SETUP_SHIFT)
84 | ((pxa2xx_mcxx_asst(speed, clock)
85 & MCXX_ASST_MASK) << MCXX_ASST_SHIFT)
86 | ((pxa2xx_mcxx_hold(speed, clock)
87 & MCXX_HOLD_MASK) << MCXX_HOLD_SHIFT);
88
89 return 0;
90}
91
92static int pxa2xx_pcmcia_set_mcio( int sock, int speed, int clock )
93{
94 MCIO(sock) = ((pxa2xx_mcxx_setup(speed, clock)
95 & MCXX_SETUP_MASK) << MCXX_SETUP_SHIFT)
96 | ((pxa2xx_mcxx_asst(speed, clock)
97 & MCXX_ASST_MASK) << MCXX_ASST_SHIFT)
98 | ((pxa2xx_mcxx_hold(speed, clock)
99 & MCXX_HOLD_MASK) << MCXX_HOLD_SHIFT);
100
101 return 0;
102}
103
104static int pxa2xx_pcmcia_set_mcatt( int sock, int speed, int clock )
105{
106 MCATT(sock) = ((pxa2xx_mcxx_setup(speed, clock)
107 & MCXX_SETUP_MASK) << MCXX_SETUP_SHIFT)
108 | ((pxa2xx_mcxx_asst(speed, clock)
109 & MCXX_ASST_MASK) << MCXX_ASST_SHIFT)
110 | ((pxa2xx_mcxx_hold(speed, clock)
111 & MCXX_HOLD_MASK) << MCXX_HOLD_SHIFT);
112
113 return 0;
114}
115
116static int pxa2xx_pcmcia_set_mcxx(struct soc_pcmcia_socket *skt, unsigned int clk)
117{
118 struct soc_pcmcia_timing timing;
119 int sock = skt->nr;
120
121 soc_common_pcmcia_get_timing(skt, &timing);
122
123 pxa2xx_pcmcia_set_mcmem(sock, timing.mem, clk);
124 pxa2xx_pcmcia_set_mcatt(sock, timing.attr, clk);
125 pxa2xx_pcmcia_set_mcio(sock, timing.io, clk);
126
127 return 0;
128}
129
130static int pxa2xx_pcmcia_set_timing(struct soc_pcmcia_socket *skt)
131{
132 unsigned int clk = get_memclk_frequency_10khz();
133 return pxa2xx_pcmcia_set_mcxx(skt, clk);
134}
135
136#ifdef CONFIG_CPU_FREQ
137
138static int
139pxa2xx_pcmcia_frequency_change(struct soc_pcmcia_socket *skt,
140 unsigned long val,
141 struct cpufreq_freqs *freqs)
142{
143#warning "it's not clear if this is right since the core CPU (N) clock has no effect on the memory (L) clock"
144 switch (val) {
145 case CPUFREQ_PRECHANGE:
146 if (freqs->new > freqs->old) {
147 debug(skt, 2, "new frequency %u.%uMHz > %u.%uMHz, "
148 "pre-updating\n",
149 freqs->new / 1000, (freqs->new / 100) % 10,
150 freqs->old / 1000, (freqs->old / 100) % 10);
151 pxa2xx_pcmcia_set_mcxx(skt, freqs->new);
152 }
153 break;
154
155 case CPUFREQ_POSTCHANGE:
156 if (freqs->new < freqs->old) {
157 debug(skt, 2, "new frequency %u.%uMHz < %u.%uMHz, "
158 "post-updating\n",
159 freqs->new / 1000, (freqs->new / 100) % 10,
160 freqs->old / 1000, (freqs->old / 100) % 10);
161 pxa2xx_pcmcia_set_mcxx(skt, freqs->new);
162 }
163 break;
164 }
165 return 0;
166}
167#endif
168
169int __pxa2xx_drv_pcmcia_probe(struct device *dev)
170{
171 int ret;
172 struct pcmcia_low_level *ops;
173 int first, nr;
174
175 if (!dev || !dev->platform_data)
176 return -ENODEV;
177
178 ops = (struct pcmcia_low_level *)dev->platform_data;
179 first = ops->first;
180 nr = ops->nr;
181
182
183 ops->set_timing = pxa2xx_pcmcia_set_timing;
184#ifdef CONFIG_CPU_FREQ
185 ops->frequency_change = pxa2xx_pcmcia_frequency_change;
186#endif
187
188 ret = soc_common_drv_pcmcia_probe(dev, ops, first, nr);
189
190 if (ret == 0) {
191
192
193
194
195 MECR |= MECR_CIT;
196
197
198 if (nr > 1)
199 MECR |= MECR_NOS;
200 else
201 MECR &= ~MECR_NOS;
202 }
203
204 return ret;
205}
206EXPORT_SYMBOL(__pxa2xx_drv_pcmcia_probe);
207
208
209static int pxa2xx_drv_pcmcia_probe(struct platform_device *dev)
210{
211 return __pxa2xx_drv_pcmcia_probe(&dev->dev);
212}
213
214static int pxa2xx_drv_pcmcia_remove(struct platform_device *dev)
215{
216 return soc_common_drv_pcmcia_remove(&dev->dev);
217}
218
219static int pxa2xx_drv_pcmcia_suspend(struct platform_device *dev, pm_message_t state)
220{
221 return pcmcia_socket_dev_suspend(&dev->dev, state);
222}
223
224static int pxa2xx_drv_pcmcia_resume(struct platform_device *dev)
225{
226 struct pcmcia_low_level *ops = dev->dev.platform_data;
227 int nr = ops ? ops->nr : 0;
228
229 MECR = nr > 1 ? MECR_CIT | MECR_NOS : (nr > 0 ? MECR_CIT : 0);
230
231 return pcmcia_socket_dev_resume(&dev->dev);
232}
233
234static struct platform_driver pxa2xx_pcmcia_driver = {
235 .probe = pxa2xx_drv_pcmcia_probe,
236 .remove = pxa2xx_drv_pcmcia_remove,
237 .suspend = pxa2xx_drv_pcmcia_suspend,
238 .resume = pxa2xx_drv_pcmcia_resume,
239 .driver = {
240 .name = "pxa2xx-pcmcia",
241 .owner = THIS_MODULE,
242 },
243};
244
245static int __init pxa2xx_pcmcia_init(void)
246{
247 return platform_driver_register(&pxa2xx_pcmcia_driver);
248}
249
250static void __exit pxa2xx_pcmcia_exit(void)
251{
252 platform_driver_unregister(&pxa2xx_pcmcia_driver);
253}
254
255fs_initcall(pxa2xx_pcmcia_init);
256module_exit(pxa2xx_pcmcia_exit);
257
258MODULE_AUTHOR("Stefan Eletzhofer <stefan.eletzhofer@inquant.de> and Ian Molton <spyro@f2s.com>");
259MODULE_DESCRIPTION("Linux PCMCIA Card Services: PXA2xx core socket driver");
260MODULE_LICENSE("GPL");
261MODULE_ALIAS("platform:pxa2xx-pcmcia");
262
