1 /*======================================================================
3 Device driver for the PCMCIA control functionality of PXA2xx
6 The contents of this file may be used under the
7 terms of the GNU Public License version 2 (the "GPL")
9 (c) Ian Molton (spyro@f2s.com) 2003
10 (c) Stefan Eletzhofer (stefan.eletzhofer@inquant.de) 2003,4
12 derived from sa11xx_base.c
14 Portions created by John G. Dorsey are
15 Copyright (C) 1999 John G. Dorsey.
17 ======================================================================*/
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>
28 #include <mach/hardware.h>
29 #include <mach/smemc.h>
32 #include <mach/pxa2xx-regs.h>
33 #include <asm/mach-types.h>
35 #include <pcmcia/ss.h>
36 #include <pcmcia/cistpl.h>
38 #include "soc_common.h"
39 #include "pxa2xx_base.h"
42 * Personal Computer Memory Card International Association (PCMCIA) sockets
45 #define PCMCIAPrtSp 0x04000000 /* PCMCIA Partition Space [byte] */
46 #define PCMCIASp (4*PCMCIAPrtSp) /* PCMCIA Space [byte] */
47 #define PCMCIAIOSp PCMCIAPrtSp /* PCMCIA I/O Space [byte] */
48 #define PCMCIAAttrSp PCMCIAPrtSp /* PCMCIA Attribute Space [byte] */
49 #define PCMCIAMemSp PCMCIAPrtSp /* PCMCIA Memory Space [byte] */
51 #define PCMCIA0Sp PCMCIASp /* PCMCIA 0 Space [byte] */
52 #define PCMCIA0IOSp PCMCIAIOSp /* PCMCIA 0 I/O Space [byte] */
53 #define PCMCIA0AttrSp PCMCIAAttrSp /* PCMCIA 0 Attribute Space [byte] */
54 #define PCMCIA0MemSp PCMCIAMemSp /* PCMCIA 0 Memory Space [byte] */
56 #define PCMCIA1Sp PCMCIASp /* PCMCIA 1 Space [byte] */
57 #define PCMCIA1IOSp PCMCIAIOSp /* PCMCIA 1 I/O Space [byte] */
58 #define PCMCIA1AttrSp PCMCIAAttrSp /* PCMCIA 1 Attribute Space [byte] */
59 #define PCMCIA1MemSp PCMCIAMemSp /* PCMCIA 1 Memory Space [byte] */
61 #define _PCMCIA(Nb) /* PCMCIA [0..1] */ \
62 (0x20000000 + (Nb) * PCMCIASp)
63 #define _PCMCIAIO(Nb) _PCMCIA(Nb) /* PCMCIA I/O [0..1] */
64 #define _PCMCIAAttr(Nb) /* PCMCIA Attribute [0..1] */ \
65 (_PCMCIA(Nb) + 2 * PCMCIAPrtSp)
66 #define _PCMCIAMem(Nb) /* PCMCIA Memory [0..1] */ \
67 (_PCMCIA(Nb) + 3 * PCMCIAPrtSp)
69 #define _PCMCIA0 _PCMCIA(0) /* PCMCIA 0 */
70 #define _PCMCIA0IO _PCMCIAIO(0) /* PCMCIA 0 I/O */
71 #define _PCMCIA0Attr _PCMCIAAttr(0) /* PCMCIA 0 Attribute */
72 #define _PCMCIA0Mem _PCMCIAMem(0) /* PCMCIA 0 Memory */
74 #define _PCMCIA1 _PCMCIA(1) /* PCMCIA 1 */
75 #define _PCMCIA1IO _PCMCIAIO(1) /* PCMCIA 1 I/O */
76 #define _PCMCIA1Attr _PCMCIAAttr(1) /* PCMCIA 1 Attribute */
77 #define _PCMCIA1Mem _PCMCIAMem(1) /* PCMCIA 1 Memory */
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)
87 static inline u_int pxa2xx_mcxx_hold(u_int pcmcia_cycle_ns,
90 u_int code = pcmcia_cycle_ns * mem_clk_10khz;
91 return (code / 300000) + ((code % 300000) ? 1 : 0) - 1;
94 static inline u_int pxa2xx_mcxx_asst(u_int pcmcia_cycle_ns,
97 u_int code = pcmcia_cycle_ns * mem_clk_10khz;
98 return (code / 300000) + ((code % 300000) ? 1 : 0) + 1;
101 static inline u_int pxa2xx_mcxx_setup(u_int pcmcia_cycle_ns,
104 u_int code = pcmcia_cycle_ns * mem_clk_10khz;
105 return (code / 100000) + ((code % 100000) ? 1 : 0) - 1;
108 /* This function returns the (approximate) command assertion period, in
109 * nanoseconds, for a given CPU clock frequency and MCXX_ASST value:
111 static inline u_int pxa2xx_pcmcia_cmd_time(u_int mem_clk_10khz,
112 u_int pcmcia_mcxx_asst)
114 return (300000 * (pcmcia_mcxx_asst + 1) / mem_clk_10khz);
117 static int pxa2xx_pcmcia_set_mcmem( int sock, int speed, int clock )
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);
128 __raw_writel(val, MCMEM(sock));
133 static int pxa2xx_pcmcia_set_mcio( int sock, int speed, int clock )
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);
144 __raw_writel(val, MCIO(sock));
149 static int pxa2xx_pcmcia_set_mcatt( int sock, int speed, int clock )
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);
160 __raw_writel(val, MCATT(sock));
165 static int pxa2xx_pcmcia_set_mcxx(struct soc_pcmcia_socket *skt, unsigned int clk)
167 struct soc_pcmcia_timing timing;
170 soc_common_pcmcia_get_timing(skt, &timing);
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);
179 static int pxa2xx_pcmcia_set_timing(struct soc_pcmcia_socket *skt)
181 unsigned long clk = clk_get_rate(skt->clk);
182 return pxa2xx_pcmcia_set_mcxx(skt, clk / 10000);
185 #ifdef CONFIG_CPU_FREQ
188 pxa2xx_pcmcia_frequency_change(struct soc_pcmcia_socket *skt,
190 struct cpufreq_freqs *freqs)
193 case CPUFREQ_PRECHANGE:
194 if (freqs->new > freqs->old) {
195 debug(skt, 2, "new frequency %u.%uMHz > %u.%uMHz, "
197 freqs->new / 1000, (freqs->new / 100) % 10,
198 freqs->old / 1000, (freqs->old / 100) % 10);
199 pxa2xx_pcmcia_set_timing(skt);
203 case CPUFREQ_POSTCHANGE:
204 if (freqs->new < freqs->old) {
205 debug(skt, 2, "new frequency %u.%uMHz < %u.%uMHz, "
207 freqs->new / 1000, (freqs->new / 100) % 10,
208 freqs->old / 1000, (freqs->old / 100) % 10);
209 pxa2xx_pcmcia_set_timing(skt);
217 void pxa2xx_configure_sockets(struct device *dev)
219 struct pcmcia_low_level *ops = dev->platform_data;
221 * We have at least one socket, so set MECR:CIT
224 uint32_t mecr = MECR_CIT;
226 /* Set MECR:NOS (Number Of Sockets) */
227 if ((ops->first + ops->nr) > 1 ||
228 machine_is_viper() || machine_is_arcom_zeus())
231 __raw_writel(mecr, MECR);
233 EXPORT_SYMBOL(pxa2xx_configure_sockets);
235 static const char *skt_names[] = {
240 #define SKT_DEV_INFO_SIZE(n) \
241 (sizeof(struct skt_dev_info) + (n)*sizeof(struct soc_pcmcia_socket))
243 int pxa2xx_drv_pcmcia_add_one(struct soc_pcmcia_socket *skt)
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;
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;
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;
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;
265 return soc_pcmcia_add_one(skt);
267 EXPORT_SYMBOL(pxa2xx_drv_pcmcia_add_one);
269 void pxa2xx_drv_pcmcia_ops(struct pcmcia_low_level *ops)
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;
277 EXPORT_SYMBOL(pxa2xx_drv_pcmcia_ops);
279 static int pxa2xx_drv_pcmcia_probe(struct platform_device *dev)
282 struct pcmcia_low_level *ops;
283 struct skt_dev_info *sinfo;
284 struct soc_pcmcia_socket *skt;
287 ops = (struct pcmcia_low_level *)dev->dev.platform_data;
293 if (cpu_is_pxa320() && ops->nr > 1) {
294 dev_err(&dev->dev, "pxa320 supports only one pcmcia slot");
299 clk = devm_clk_get(&dev->dev, NULL);
303 pxa2xx_drv_pcmcia_ops(ops);
305 sinfo = devm_kzalloc(&dev->dev, SKT_DEV_INFO_SIZE(ops->nr),
310 sinfo->nskt = ops->nr;
312 /* Initialize processor specific parameters */
313 for (i = 0; i < ops->nr; i++) {
314 skt = &sinfo->skt[i];
316 skt->nr = ops->first + i;
318 soc_pcmcia_init_one(skt, ops, &dev->dev);
320 ret = pxa2xx_drv_pcmcia_add_one(skt);
325 pxa2xx_configure_sockets(&dev->dev);
326 dev_set_drvdata(&dev->dev, sinfo);
332 soc_pcmcia_remove_one(&sinfo->skt[i]);
338 static int pxa2xx_drv_pcmcia_remove(struct platform_device *dev)
340 struct skt_dev_info *sinfo = platform_get_drvdata(dev);
343 for (i = 0; i < sinfo->nskt; i++)
344 soc_pcmcia_remove_one(&sinfo->skt[i]);
349 static int pxa2xx_drv_pcmcia_resume(struct device *dev)
351 pxa2xx_configure_sockets(dev);
355 static const struct dev_pm_ops pxa2xx_drv_pcmcia_pm_ops = {
356 .resume = pxa2xx_drv_pcmcia_resume,
359 static struct platform_driver pxa2xx_pcmcia_driver = {
360 .probe = pxa2xx_drv_pcmcia_probe,
361 .remove = pxa2xx_drv_pcmcia_remove,
363 .name = "pxa2xx-pcmcia",
364 .pm = &pxa2xx_drv_pcmcia_pm_ops,
368 static int __init pxa2xx_pcmcia_init(void)
370 return platform_driver_register(&pxa2xx_pcmcia_driver);
373 static void __exit pxa2xx_pcmcia_exit(void)
375 platform_driver_unregister(&pxa2xx_pcmcia_driver);
378 fs_initcall(pxa2xx_pcmcia_init);
379 module_exit(pxa2xx_pcmcia_exit);
381 MODULE_AUTHOR("Stefan Eletzhofer <stefan.eletzhofer@inquant.de> and Ian Molton <spyro@f2s.com>");
382 MODULE_DESCRIPTION("Linux PCMCIA Card Services: PXA2xx core socket driver");
383 MODULE_LICENSE("GPL");
384 MODULE_ALIAS("platform:pxa2xx-pcmcia");