| 1 | // SPDX-License-Identifier: GPL-2.0-only |
| 2 | /*====================================================================== |
| 3 | |
| 4 | Device driver for the PCMCIA control functionality of PXA2xx |
| 5 | microprocessors. |
| 6 | |
| 7 | |
| 8 | (c) Ian Molton (spyro@f2s.com) 2003 |
| 9 | (c) Stefan Eletzhofer (stefan.eletzhofer@inquant.de) 2003,4 |
| 10 | |
| 11 | derived from sa11xx_base.c |
| 12 | |
| 13 | Portions created by John G. Dorsey are |
| 14 | Copyright (C) 1999 John G. Dorsey. |
| 15 | |
| 16 | ======================================================================*/ |
| 17 | |
| 18 | #include <linux/module.h> |
| 19 | #include <linux/slab.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 | #include <linux/soc/pxa/cpu.h> |
| 27 | #include <linux/soc/pxa/smemc.h> |
| 28 | |
| 29 | #include <asm/io.h> |
| 30 | #include <asm/irq.h> |
| 31 | #include <asm/mach-types.h> |
| 32 | |
| 33 | #include <pcmcia/ss.h> |
| 34 | #include <pcmcia/cistpl.h> |
| 35 | |
| 36 | #include "soc_common.h" |
| 37 | #include "pxa2xx_base.h" |
| 38 | |
| 39 | /* |
| 40 | * Personal Computer Memory Card International Association (PCMCIA) sockets |
| 41 | */ |
| 42 | |
| 43 | #define PCMCIAPrtSp 0x04000000 /* PCMCIA Partition Space [byte] */ |
| 44 | #define PCMCIASp (4*PCMCIAPrtSp) /* PCMCIA Space [byte] */ |
| 45 | #define PCMCIAIOSp PCMCIAPrtSp /* PCMCIA I/O Space [byte] */ |
| 46 | #define PCMCIAAttrSp PCMCIAPrtSp /* PCMCIA Attribute Space [byte] */ |
| 47 | #define PCMCIAMemSp PCMCIAPrtSp /* PCMCIA Memory Space [byte] */ |
| 48 | |
| 49 | #define PCMCIA0Sp PCMCIASp /* PCMCIA 0 Space [byte] */ |
| 50 | #define PCMCIA0IOSp PCMCIAIOSp /* PCMCIA 0 I/O Space [byte] */ |
| 51 | #define PCMCIA0AttrSp PCMCIAAttrSp /* PCMCIA 0 Attribute Space [byte] */ |
| 52 | #define PCMCIA0MemSp PCMCIAMemSp /* PCMCIA 0 Memory Space [byte] */ |
| 53 | |
| 54 | #define PCMCIA1Sp PCMCIASp /* PCMCIA 1 Space [byte] */ |
| 55 | #define PCMCIA1IOSp PCMCIAIOSp /* PCMCIA 1 I/O Space [byte] */ |
| 56 | #define PCMCIA1AttrSp PCMCIAAttrSp /* PCMCIA 1 Attribute Space [byte] */ |
| 57 | #define PCMCIA1MemSp PCMCIAMemSp /* PCMCIA 1 Memory Space [byte] */ |
| 58 | |
| 59 | #define _PCMCIA(Nb) /* PCMCIA [0..1] */ \ |
| 60 | (0x20000000 + (Nb) * PCMCIASp) |
| 61 | #define _PCMCIAIO(Nb) _PCMCIA(Nb) /* PCMCIA I/O [0..1] */ |
| 62 | #define _PCMCIAAttr(Nb) /* PCMCIA Attribute [0..1] */ \ |
| 63 | (_PCMCIA(Nb) + 2 * PCMCIAPrtSp) |
| 64 | #define _PCMCIAMem(Nb) /* PCMCIA Memory [0..1] */ \ |
| 65 | (_PCMCIA(Nb) + 3 * PCMCIAPrtSp) |
| 66 | |
| 67 | #define _PCMCIA0 _PCMCIA(0) /* PCMCIA 0 */ |
| 68 | #define _PCMCIA0IO _PCMCIAIO(0) /* PCMCIA 0 I/O */ |
| 69 | #define _PCMCIA0Attr _PCMCIAAttr(0) /* PCMCIA 0 Attribute */ |
| 70 | #define _PCMCIA0Mem _PCMCIAMem(0) /* PCMCIA 0 Memory */ |
| 71 | |
| 72 | #define _PCMCIA1 _PCMCIA(1) /* PCMCIA 1 */ |
| 73 | #define _PCMCIA1IO _PCMCIAIO(1) /* PCMCIA 1 I/O */ |
| 74 | #define _PCMCIA1Attr _PCMCIAAttr(1) /* PCMCIA 1 Attribute */ |
| 75 | #define _PCMCIA1Mem _PCMCIAMem(1) /* PCMCIA 1 Memory */ |
| 76 | |
| 77 | |
| 78 | #define MCXX_SETUP_MASK (0x7f) |
| 79 | #define MCXX_ASST_MASK (0x1f) |
| 80 | #define MCXX_HOLD_MASK (0x3f) |
| 81 | #define MCXX_SETUP_SHIFT (0) |
| 82 | #define MCXX_ASST_SHIFT (7) |
| 83 | #define MCXX_HOLD_SHIFT (14) |
| 84 | |
| 85 | static inline u_int pxa2xx_mcxx_hold(u_int pcmcia_cycle_ns, |
| 86 | u_int mem_clk_10khz) |
| 87 | { |
| 88 | u_int code = pcmcia_cycle_ns * mem_clk_10khz; |
| 89 | return (code / 300000) + ((code % 300000) ? 1 : 0) - 1; |
| 90 | } |
| 91 | |
| 92 | static inline u_int pxa2xx_mcxx_asst(u_int pcmcia_cycle_ns, |
| 93 | u_int mem_clk_10khz) |
| 94 | { |
| 95 | u_int code = pcmcia_cycle_ns * mem_clk_10khz; |
| 96 | return (code / 300000) + ((code % 300000) ? 1 : 0) + 1; |
| 97 | } |
| 98 | |
| 99 | static inline u_int pxa2xx_mcxx_setup(u_int pcmcia_cycle_ns, |
| 100 | u_int mem_clk_10khz) |
| 101 | { |
| 102 | u_int code = pcmcia_cycle_ns * mem_clk_10khz; |
| 103 | return (code / 100000) + ((code % 100000) ? 1 : 0) - 1; |
| 104 | } |
| 105 | |
| 106 | /* This function returns the (approximate) command assertion period, in |
| 107 | * nanoseconds, for a given CPU clock frequency and MCXX_ASST value: |
| 108 | */ |
| 109 | static inline u_int pxa2xx_pcmcia_cmd_time(u_int mem_clk_10khz, |
| 110 | u_int pcmcia_mcxx_asst) |
| 111 | { |
| 112 | return (300000 * (pcmcia_mcxx_asst + 1) / mem_clk_10khz); |
| 113 | } |
| 114 | |
| 115 | static uint32_t pxa2xx_pcmcia_mcmem(int sock, int speed, int clock) |
| 116 | { |
| 117 | uint32_t val; |
| 118 | |
| 119 | val = ((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 val; |
| 127 | } |
| 128 | |
| 129 | static int pxa2xx_pcmcia_mcio(int sock, int speed, int clock) |
| 130 | { |
| 131 | uint32_t val; |
| 132 | |
| 133 | val = ((pxa2xx_mcxx_setup(speed, clock) |
| 134 | & MCXX_SETUP_MASK) << MCXX_SETUP_SHIFT) |
| 135 | | ((pxa2xx_mcxx_asst(speed, clock) |
| 136 | & MCXX_ASST_MASK) << MCXX_ASST_SHIFT) |
| 137 | | ((pxa2xx_mcxx_hold(speed, clock) |
| 138 | & MCXX_HOLD_MASK) << MCXX_HOLD_SHIFT); |
| 139 | |
| 140 | |
| 141 | return val; |
| 142 | } |
| 143 | |
| 144 | static int pxa2xx_pcmcia_mcatt(int sock, int speed, int clock) |
| 145 | { |
| 146 | uint32_t val; |
| 147 | |
| 148 | val = ((pxa2xx_mcxx_setup(speed, clock) |
| 149 | & MCXX_SETUP_MASK) << MCXX_SETUP_SHIFT) |
| 150 | | ((pxa2xx_mcxx_asst(speed, clock) |
| 151 | & MCXX_ASST_MASK) << MCXX_ASST_SHIFT) |
| 152 | | ((pxa2xx_mcxx_hold(speed, clock) |
| 153 | & MCXX_HOLD_MASK) << MCXX_HOLD_SHIFT); |
| 154 | |
| 155 | |
| 156 | return val; |
| 157 | } |
| 158 | |
| 159 | static int pxa2xx_pcmcia_set_timing(struct soc_pcmcia_socket *skt) |
| 160 | { |
| 161 | unsigned long clk = clk_get_rate(skt->clk) / 10000; |
| 162 | struct soc_pcmcia_timing timing; |
| 163 | int sock = skt->nr; |
| 164 | |
| 165 | soc_common_pcmcia_get_timing(skt, &timing); |
| 166 | |
| 167 | pxa_smemc_set_pcmcia_timing(sock, |
| 168 | pxa2xx_pcmcia_mcmem(sock, timing.mem, clk), |
| 169 | pxa2xx_pcmcia_mcatt(sock, timing.attr, clk), |
| 170 | pxa2xx_pcmcia_mcio(sock, timing.io, clk)); |
| 171 | |
| 172 | return 0; |
| 173 | } |
| 174 | |
| 175 | #ifdef CONFIG_CPU_FREQ |
| 176 | |
| 177 | static int |
| 178 | pxa2xx_pcmcia_frequency_change(struct soc_pcmcia_socket *skt, |
| 179 | unsigned long val, |
| 180 | struct cpufreq_freqs *freqs) |
| 181 | { |
| 182 | switch (val) { |
| 183 | case CPUFREQ_PRECHANGE: |
| 184 | if (freqs->new > freqs->old) { |
| 185 | debug(skt, 2, "new frequency %u.%uMHz > %u.%uMHz, " |
| 186 | "pre-updating\n", |
| 187 | freqs->new / 1000, (freqs->new / 100) % 10, |
| 188 | freqs->old / 1000, (freqs->old / 100) % 10); |
| 189 | pxa2xx_pcmcia_set_timing(skt); |
| 190 | } |
| 191 | break; |
| 192 | |
| 193 | case CPUFREQ_POSTCHANGE: |
| 194 | if (freqs->new < freqs->old) { |
| 195 | debug(skt, 2, "new frequency %u.%uMHz < %u.%uMHz, " |
| 196 | "post-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 | return 0; |
| 204 | } |
| 205 | #endif |
| 206 | |
| 207 | void pxa2xx_configure_sockets(struct device *dev, struct pcmcia_low_level *ops) |
| 208 | { |
| 209 | pxa_smemc_set_pcmcia_socket(1); |
| 210 | } |
| 211 | EXPORT_SYMBOL(pxa2xx_configure_sockets); |
| 212 | |
| 213 | static const char *skt_names[] = { |
| 214 | "PCMCIA socket 0", |
| 215 | "PCMCIA socket 1", |
| 216 | }; |
| 217 | |
| 218 | #define SKT_DEV_INFO_SIZE(n) \ |
| 219 | (sizeof(struct skt_dev_info) + (n)*sizeof(struct soc_pcmcia_socket)) |
| 220 | |
| 221 | int pxa2xx_drv_pcmcia_add_one(struct soc_pcmcia_socket *skt) |
| 222 | { |
| 223 | skt->res_skt.start = _PCMCIA(skt->nr); |
| 224 | skt->res_skt.end = _PCMCIA(skt->nr) + PCMCIASp - 1; |
| 225 | skt->res_skt.name = skt_names[skt->nr]; |
| 226 | skt->res_skt.flags = IORESOURCE_MEM; |
| 227 | |
| 228 | skt->res_io.start = _PCMCIAIO(skt->nr); |
| 229 | skt->res_io.end = _PCMCIAIO(skt->nr) + PCMCIAIOSp - 1; |
| 230 | skt->res_io.name = "io"; |
| 231 | skt->res_io.flags = IORESOURCE_MEM | IORESOURCE_BUSY; |
| 232 | |
| 233 | skt->res_mem.start = _PCMCIAMem(skt->nr); |
| 234 | skt->res_mem.end = _PCMCIAMem(skt->nr) + PCMCIAMemSp - 1; |
| 235 | skt->res_mem.name = "memory"; |
| 236 | skt->res_mem.flags = IORESOURCE_MEM; |
| 237 | |
| 238 | skt->res_attr.start = _PCMCIAAttr(skt->nr); |
| 239 | skt->res_attr.end = _PCMCIAAttr(skt->nr) + PCMCIAAttrSp - 1; |
| 240 | skt->res_attr.name = "attribute"; |
| 241 | skt->res_attr.flags = IORESOURCE_MEM; |
| 242 | |
| 243 | return soc_pcmcia_add_one(skt); |
| 244 | } |
| 245 | EXPORT_SYMBOL(pxa2xx_drv_pcmcia_add_one); |
| 246 | |
| 247 | void pxa2xx_drv_pcmcia_ops(struct pcmcia_low_level *ops) |
| 248 | { |
| 249 | /* Provide our PXA2xx specific timing routines. */ |
| 250 | ops->set_timing = pxa2xx_pcmcia_set_timing; |
| 251 | #ifdef CONFIG_CPU_FREQ |
| 252 | ops->frequency_change = pxa2xx_pcmcia_frequency_change; |
| 253 | #endif |
| 254 | } |
| 255 | EXPORT_SYMBOL(pxa2xx_drv_pcmcia_ops); |
| 256 | |
| 257 | static int pxa2xx_drv_pcmcia_probe(struct platform_device *dev) |
| 258 | { |
| 259 | int i, ret = 0; |
| 260 | struct pcmcia_low_level *ops; |
| 261 | struct skt_dev_info *sinfo; |
| 262 | struct soc_pcmcia_socket *skt; |
| 263 | struct clk *clk; |
| 264 | |
| 265 | ops = (struct pcmcia_low_level *)dev->dev.platform_data; |
| 266 | if (!ops) { |
| 267 | ret = -ENODEV; |
| 268 | goto err0; |
| 269 | } |
| 270 | |
| 271 | if (cpu_is_pxa320() && ops->nr > 1) { |
| 272 | dev_err(&dev->dev, "pxa320 supports only one pcmcia slot"); |
| 273 | ret = -EINVAL; |
| 274 | goto err0; |
| 275 | } |
| 276 | |
| 277 | clk = devm_clk_get(&dev->dev, NULL); |
| 278 | if (IS_ERR(clk)) |
| 279 | return -ENODEV; |
| 280 | |
| 281 | pxa2xx_drv_pcmcia_ops(ops); |
| 282 | |
| 283 | sinfo = devm_kzalloc(&dev->dev, SKT_DEV_INFO_SIZE(ops->nr), |
| 284 | GFP_KERNEL); |
| 285 | if (!sinfo) |
| 286 | return -ENOMEM; |
| 287 | |
| 288 | sinfo->nskt = ops->nr; |
| 289 | |
| 290 | /* Initialize processor specific parameters */ |
| 291 | for (i = 0; i < ops->nr; i++) { |
| 292 | skt = &sinfo->skt[i]; |
| 293 | |
| 294 | skt->nr = ops->first + i; |
| 295 | skt->clk = clk; |
| 296 | soc_pcmcia_init_one(skt, ops, &dev->dev); |
| 297 | |
| 298 | ret = pxa2xx_drv_pcmcia_add_one(skt); |
| 299 | if (ret) |
| 300 | goto err1; |
| 301 | } |
| 302 | |
| 303 | pxa2xx_configure_sockets(&dev->dev, ops); |
| 304 | dev_set_drvdata(&dev->dev, sinfo); |
| 305 | |
| 306 | return 0; |
| 307 | |
| 308 | err1: |
| 309 | while (--i >= 0) |
| 310 | soc_pcmcia_remove_one(&sinfo->skt[i]); |
| 311 | |
| 312 | err0: |
| 313 | return ret; |
| 314 | } |
| 315 | |
| 316 | static int pxa2xx_drv_pcmcia_remove(struct platform_device *dev) |
| 317 | { |
| 318 | struct skt_dev_info *sinfo = platform_get_drvdata(dev); |
| 319 | int i; |
| 320 | |
| 321 | for (i = 0; i < sinfo->nskt; i++) |
| 322 | soc_pcmcia_remove_one(&sinfo->skt[i]); |
| 323 | |
| 324 | return 0; |
| 325 | } |
| 326 | |
| 327 | static int pxa2xx_drv_pcmcia_resume(struct device *dev) |
| 328 | { |
| 329 | struct pcmcia_low_level *ops = (struct pcmcia_low_level *)dev->platform_data; |
| 330 | |
| 331 | pxa2xx_configure_sockets(dev, ops); |
| 332 | return 0; |
| 333 | } |
| 334 | |
| 335 | static const struct dev_pm_ops pxa2xx_drv_pcmcia_pm_ops = { |
| 336 | .resume = pxa2xx_drv_pcmcia_resume, |
| 337 | }; |
| 338 | |
| 339 | static struct platform_driver pxa2xx_pcmcia_driver = { |
| 340 | .probe = pxa2xx_drv_pcmcia_probe, |
| 341 | .remove = pxa2xx_drv_pcmcia_remove, |
| 342 | .driver = { |
| 343 | .name = "pxa2xx-pcmcia", |
| 344 | .pm = &pxa2xx_drv_pcmcia_pm_ops, |
| 345 | }, |
| 346 | }; |
| 347 | |
| 348 | static int __init pxa2xx_pcmcia_init(void) |
| 349 | { |
| 350 | return platform_driver_register(&pxa2xx_pcmcia_driver); |
| 351 | } |
| 352 | |
| 353 | static void __exit pxa2xx_pcmcia_exit(void) |
| 354 | { |
| 355 | platform_driver_unregister(&pxa2xx_pcmcia_driver); |
| 356 | } |
| 357 | |
| 358 | fs_initcall(pxa2xx_pcmcia_init); |
| 359 | module_exit(pxa2xx_pcmcia_exit); |
| 360 | |
| 361 | MODULE_AUTHOR("Stefan Eletzhofer <stefan.eletzhofer@inquant.de> and Ian Molton <spyro@f2s.com>"); |
| 362 | MODULE_DESCRIPTION("Linux PCMCIA Card Services: PXA2xx core socket driver"); |
| 363 | MODULE_LICENSE("GPL"); |
| 364 | MODULE_ALIAS("platform:pxa2xx-pcmcia"); |