Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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> |
| 20 | #include <linux/init.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | #include <linux/cpufreq.h> |
| 22 | #include <linux/ioport.h> |
| 23 | #include <linux/kernel.h> |
| 24 | #include <linux/spinlock.h> |
Russell King | d052d1b | 2005-10-29 19:07:23 +0100 | [diff] [blame] | 25 | #include <linux/platform_device.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 27 | #include <mach/hardware.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | #include <asm/io.h> |
| 29 | #include <asm/irq.h> |
| 30 | #include <asm/system.h> |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 31 | #include <mach/pxa2xx-regs.h> |
Marc Zyngier | 20f18ff | 2008-08-19 12:15:53 +0200 | [diff] [blame] | 32 | #include <asm/mach-types.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | |
| 34 | #include <pcmcia/cs_types.h> |
| 35 | #include <pcmcia/ss.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | #include <pcmcia/cistpl.h> |
| 37 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | #include "soc_common.h" |
| 39 | #include "pxa2xx_base.h" |
| 40 | |
Eric Miao | b393c69 | 2009-01-19 17:34:27 +0800 | [diff] [blame] | 41 | /* |
| 42 | * Personal Computer Memory Card International Association (PCMCIA) sockets |
| 43 | */ |
| 44 | |
| 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] */ |
| 50 | |
| 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] */ |
| 55 | |
| 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] */ |
| 60 | |
| 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) |
| 68 | |
| 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 */ |
| 73 | |
| 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 */ |
| 78 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
| 87 | static 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 | |
| 94 | static 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; |
Milan Plzik | 24d6572 | 2007-10-16 01:23:49 -0700 | [diff] [blame] | 98 | return (code / 300000) + ((code % 300000) ? 1 : 0) + 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 99 | } |
| 100 | |
| 101 | static 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 | /* This function returns the (approximate) command assertion period, in |
| 109 | * nanoseconds, for a given CPU clock frequency and MCXX_ASST value: |
| 110 | */ |
| 111 | static 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 | |
| 117 | static 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 | |
| 129 | static 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 | |
| 141 | static 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 | |
| 153 | static 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 | |
| 167 | static 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 | |
| 175 | static int |
| 176 | pxa2xx_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 | |
Marc Zyngier | 20f18ff | 2008-08-19 12:15:53 +0200 | [diff] [blame] | 206 | static void pxa2xx_configure_sockets(struct device *dev) |
| 207 | { |
| 208 | struct pcmcia_low_level *ops = dev->platform_data; |
| 209 | |
| 210 | /* |
| 211 | * We have at least one socket, so set MECR:CIT |
| 212 | * (Card Is There) |
| 213 | */ |
| 214 | MECR |= MECR_CIT; |
| 215 | |
| 216 | /* Set MECR:NOS (Number Of Sockets) */ |
Marek Vasut | d66ea8d | 2009-03-28 17:56:28 +0800 | [diff] [blame] | 217 | if ((ops->first + ops->nr) > 1 || machine_is_viper()) |
Marc Zyngier | 20f18ff | 2008-08-19 12:15:53 +0200 | [diff] [blame] | 218 | MECR |= MECR_NOS; |
| 219 | else |
| 220 | MECR &= ~MECR_NOS; |
| 221 | } |
| 222 | |
Eric Miao | b393c69 | 2009-01-19 17:34:27 +0800 | [diff] [blame] | 223 | static 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 | |
Russell King | 9468613 | 2006-10-28 22:42:56 +0100 | [diff] [blame] | 231 | int __pxa2xx_drv_pcmcia_probe(struct device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 232 | { |
Eric Miao | b393c69 | 2009-01-19 17:34:27 +0800 | [diff] [blame] | 233 | int i, ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | struct pcmcia_low_level *ops; |
Eric Miao | b393c69 | 2009-01-19 17:34:27 +0800 | [diff] [blame] | 235 | struct skt_dev_info *sinfo; |
| 236 | struct soc_pcmcia_socket *skt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 237 | |
| 238 | if (!dev || !dev->platform_data) |
| 239 | return -ENODEV; |
| 240 | |
| 241 | ops = (struct pcmcia_low_level *)dev->platform_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 242 | |
Eric Miao | b393c69 | 2009-01-19 17:34:27 +0800 | [diff] [blame] | 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 | /* Initialize processor specific parameters */ |
| 250 | for (i = 0; i < ops->nr; i++) { |
| 251 | skt = &sinfo->skt[i]; |
| 252 | |
Marek Vasut | d66ea8d | 2009-03-28 17:56:28 +0800 | [diff] [blame] | 253 | skt->nr = ops->first + i; |
Eric Miao | b393c69 | 2009-01-19 17:34:27 +0800 | [diff] [blame] | 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | /* Provide our PXA2xx specific timing routines. */ |
| 278 | ops->set_timing = pxa2xx_pcmcia_set_timing; |
| 279 | #ifdef CONFIG_CPU_FREQ |
| 280 | ops->frequency_change = pxa2xx_pcmcia_frequency_change; |
| 281 | #endif |
| 282 | |
Eric Miao | b393c69 | 2009-01-19 17:34:27 +0800 | [diff] [blame] | 283 | ret = soc_common_drv_pcmcia_probe(dev, ops, sinfo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | |
Marc Zyngier | 20f18ff | 2008-08-19 12:15:53 +0200 | [diff] [blame] | 285 | if (!ret) |
| 286 | pxa2xx_configure_sockets(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | |
| 288 | return ret; |
| 289 | } |
Russell King | 9468613 | 2006-10-28 22:42:56 +0100 | [diff] [blame] | 290 | EXPORT_SYMBOL(__pxa2xx_drv_pcmcia_probe); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 291 | |
Russell King | 9468613 | 2006-10-28 22:42:56 +0100 | [diff] [blame] | 292 | |
| 293 | static int pxa2xx_drv_pcmcia_probe(struct platform_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 294 | { |
Russell King | 9468613 | 2006-10-28 22:42:56 +0100 | [diff] [blame] | 295 | return __pxa2xx_drv_pcmcia_probe(&dev->dev); |
| 296 | } |
| 297 | |
| 298 | static int pxa2xx_drv_pcmcia_remove(struct platform_device *dev) |
| 299 | { |
| 300 | return soc_common_drv_pcmcia_remove(&dev->dev); |
| 301 | } |
| 302 | |
| 303 | static int pxa2xx_drv_pcmcia_suspend(struct platform_device *dev, pm_message_t state) |
| 304 | { |
| 305 | return pcmcia_socket_dev_suspend(&dev->dev, state); |
| 306 | } |
| 307 | |
| 308 | static int pxa2xx_drv_pcmcia_resume(struct platform_device *dev) |
| 309 | { |
Marc Zyngier | 20f18ff | 2008-08-19 12:15:53 +0200 | [diff] [blame] | 310 | pxa2xx_configure_sockets(&dev->dev); |
Russell King | 9468613 | 2006-10-28 22:42:56 +0100 | [diff] [blame] | 311 | return pcmcia_socket_dev_resume(&dev->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 312 | } |
| 313 | |
Russell King | 9468613 | 2006-10-28 22:42:56 +0100 | [diff] [blame] | 314 | static struct platform_driver pxa2xx_pcmcia_driver = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | .probe = pxa2xx_drv_pcmcia_probe, |
Russell King | 9468613 | 2006-10-28 22:42:56 +0100 | [diff] [blame] | 316 | .remove = pxa2xx_drv_pcmcia_remove, |
| 317 | .suspend = pxa2xx_drv_pcmcia_suspend, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 318 | .resume = pxa2xx_drv_pcmcia_resume, |
Russell King | 9468613 | 2006-10-28 22:42:56 +0100 | [diff] [blame] | 319 | .driver = { |
| 320 | .name = "pxa2xx-pcmcia", |
Kay Sievers | 12c2c01 | 2008-04-15 14:34:34 -0700 | [diff] [blame] | 321 | .owner = THIS_MODULE, |
Russell King | 9468613 | 2006-10-28 22:42:56 +0100 | [diff] [blame] | 322 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 323 | }; |
| 324 | |
| 325 | static int __init pxa2xx_pcmcia_init(void) |
| 326 | { |
Russell King | 9468613 | 2006-10-28 22:42:56 +0100 | [diff] [blame] | 327 | return platform_driver_register(&pxa2xx_pcmcia_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 328 | } |
| 329 | |
| 330 | static void __exit pxa2xx_pcmcia_exit(void) |
| 331 | { |
Russell King | 9468613 | 2006-10-28 22:42:56 +0100 | [diff] [blame] | 332 | platform_driver_unregister(&pxa2xx_pcmcia_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 333 | } |
| 334 | |
Richard Purdie | f36598a | 2005-09-03 19:39:25 +0100 | [diff] [blame] | 335 | fs_initcall(pxa2xx_pcmcia_init); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 336 | module_exit(pxa2xx_pcmcia_exit); |
| 337 | |
| 338 | MODULE_AUTHOR("Stefan Eletzhofer <stefan.eletzhofer@inquant.de> and Ian Molton <spyro@f2s.com>"); |
| 339 | MODULE_DESCRIPTION("Linux PCMCIA Card Services: PXA2xx core socket driver"); |
| 340 | MODULE_LICENSE("GPL"); |
Kay Sievers | 12c2c01 | 2008-04-15 14:34:34 -0700 | [diff] [blame] | 341 | MODULE_ALIAS("platform:pxa2xx-pcmcia"); |