1 /* 2 * Sharp SL-C7xx Series PCMCIA routines 3 * 4 * Copyright (c) 2004-2005 Richard Purdie 5 * 6 * Based on Sharp's 2.4 kernel patches and pxa2xx_mainstone.c 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License version 2 as 10 * published by the Free Software Foundation. 11 * 12 */ 13 14 #include <linux/module.h> 15 #include <linux/init.h> 16 #include <linux/kernel.h> 17 #include <linux/errno.h> 18 #include <linux/interrupt.h> 19 #include <linux/platform_device.h> 20 21 #include <asm/mach-types.h> 22 #include <asm/hardware.h> 23 #include <asm/irq.h> 24 #include <asm/hardware/scoop.h> 25 26 #include "soc_common.h" 27 28 #define NO_KEEP_VS 0x0001 29 30 /* PCMCIA to Scoop linkage 31 32 There is no easy way to link multiple scoop devices into one 33 single entity for the pxa2xx_pcmcia device so this structure 34 is used which is setup by the platform code 35 */ 36 struct scoop_pcmcia_config *platform_scoop_config; 37 #define SCOOP_DEV platform_scoop_config->devs 38 39 static void sharpsl_pcmcia_init_reset(struct scoop_pcmcia_dev *scoopdev) 40 { 41 reset_scoop(scoopdev->dev); 42 scoopdev->keep_vs = NO_KEEP_VS; 43 scoopdev->keep_rd = 0; 44 } 45 46 static int sharpsl_pcmcia_hw_init(struct soc_pcmcia_socket *skt) 47 { 48 int ret; 49 50 if (platform_scoop_config->pcmcia_init) 51 platform_scoop_config->pcmcia_init(); 52 53 /* Register interrupts */ 54 if (SCOOP_DEV[skt->nr].cd_irq >= 0) { 55 struct pcmcia_irqs cd_irq; 56 57 cd_irq.sock = skt->nr; 58 cd_irq.irq = SCOOP_DEV[skt->nr].cd_irq; 59 cd_irq.str = SCOOP_DEV[skt->nr].cd_irq_str; 60 ret = soc_pcmcia_request_irqs(skt, &cd_irq, 1); 61 62 if (ret) { 63 printk(KERN_ERR "Request for Compact Flash IRQ failed\n"); 64 return ret; 65 } 66 } 67 68 skt->irq = SCOOP_DEV[skt->nr].irq; 69 70 return 0; 71 } 72 73 static void sharpsl_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt) 74 { 75 if (SCOOP_DEV[skt->nr].cd_irq >= 0) { 76 struct pcmcia_irqs cd_irq; 77 78 cd_irq.sock = skt->nr; 79 cd_irq.irq = SCOOP_DEV[skt->nr].cd_irq; 80 cd_irq.str = SCOOP_DEV[skt->nr].cd_irq_str; 81 soc_pcmcia_free_irqs(skt, &cd_irq, 1); 82 } 83 } 84 85 86 static void sharpsl_pcmcia_socket_state(struct soc_pcmcia_socket *skt, 87 struct pcmcia_state *state) 88 { 89 unsigned short cpr, csr; 90 struct device *scoop = SCOOP_DEV[skt->nr].dev; 91 92 cpr = read_scoop_reg(SCOOP_DEV[skt->nr].dev, SCOOP_CPR); 93 94 write_scoop_reg(scoop, SCOOP_IRM, 0x00FF); 95 write_scoop_reg(scoop, SCOOP_ISR, 0x0000); 96 write_scoop_reg(scoop, SCOOP_IRM, 0x0000); 97 csr = read_scoop_reg(scoop, SCOOP_CSR); 98 if (csr & 0x0004) { 99 /* card eject */ 100 write_scoop_reg(scoop, SCOOP_CDR, 0x0000); 101 SCOOP_DEV[skt->nr].keep_vs = NO_KEEP_VS; 102 } 103 else if (!(SCOOP_DEV[skt->nr].keep_vs & NO_KEEP_VS)) { 104 /* keep vs1,vs2 */ 105 write_scoop_reg(scoop, SCOOP_CDR, 0x0000); 106 csr |= SCOOP_DEV[skt->nr].keep_vs; 107 } 108 else if (cpr & 0x0003) { 109 /* power on */ 110 write_scoop_reg(scoop, SCOOP_CDR, 0x0000); 111 SCOOP_DEV[skt->nr].keep_vs = (csr & 0x00C0); 112 } 113 else { 114 /* card detect */ 115 if ((machine_is_spitz() || machine_is_borzoi()) && skt->nr == 1) { 116 write_scoop_reg(scoop, SCOOP_CDR, 0x0000); 117 } else { 118 write_scoop_reg(scoop, SCOOP_CDR, 0x0002); 119 } 120 } 121 122 state->detect = (csr & 0x0004) ? 0 : 1; 123 state->ready = (csr & 0x0002) ? 1 : 0; 124 state->bvd1 = (csr & 0x0010) ? 1 : 0; 125 state->bvd2 = (csr & 0x0020) ? 1 : 0; 126 state->wrprot = (csr & 0x0008) ? 1 : 0; 127 state->vs_3v = (csr & 0x0040) ? 0 : 1; 128 state->vs_Xv = (csr & 0x0080) ? 0 : 1; 129 130 if ((cpr & 0x0080) && ((cpr & 0x8040) != 0x8040)) { 131 printk(KERN_ERR "sharpsl_pcmcia_socket_state(): CPR=%04X, Low voltage!\n", cpr); 132 } 133 } 134 135 136 static int sharpsl_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, 137 const socket_state_t *state) 138 { 139 unsigned long flags; 140 struct device *scoop = SCOOP_DEV[skt->nr].dev; 141 142 unsigned short cpr, ncpr, ccr, nccr, mcr, nmcr, imr, nimr; 143 144 switch (state->Vcc) { 145 case 0: break; 146 case 33: break; 147 case 50: break; 148 default: 149 printk(KERN_ERR "sharpsl_pcmcia_configure_socket(): bad Vcc %u\n", state->Vcc); 150 return -1; 151 } 152 153 if ((state->Vpp!=state->Vcc) && (state->Vpp!=0)) { 154 printk(KERN_ERR "CF slot cannot support Vpp %u\n", state->Vpp); 155 return -1; 156 } 157 158 local_irq_save(flags); 159 160 nmcr = (mcr = read_scoop_reg(scoop, SCOOP_MCR)) & ~0x0010; 161 ncpr = (cpr = read_scoop_reg(scoop, SCOOP_CPR)) & ~0x0083; 162 nccr = (ccr = read_scoop_reg(scoop, SCOOP_CCR)) & ~0x0080; 163 nimr = (imr = read_scoop_reg(scoop, SCOOP_IMR)) & ~0x003E; 164 165 if ((machine_is_spitz() || machine_is_borzoi() || machine_is_akita()) && skt->nr == 0) { 166 ncpr |= (state->Vcc == 33) ? 0x0002 : 167 (state->Vcc == 50) ? 0x0002 : 0; 168 } else { 169 ncpr |= (state->Vcc == 33) ? 0x0001 : 170 (state->Vcc == 50) ? 0x0002 : 0; 171 } 172 nmcr |= (state->flags&SS_IOCARD) ? 0x0010 : 0; 173 ncpr |= (state->flags&SS_OUTPUT_ENA) ? 0x0080 : 0; 174 nccr |= (state->flags&SS_RESET)? 0x0080: 0; 175 nimr |= ((skt->status&SS_DETECT) ? 0x0004 : 0)| 176 ((skt->status&SS_READY) ? 0x0002 : 0)| 177 ((skt->status&SS_BATDEAD)? 0x0010 : 0)| 178 ((skt->status&SS_BATWARN)? 0x0020 : 0)| 179 ((skt->status&SS_STSCHG) ? 0x0010 : 0)| 180 ((skt->status&SS_WRPROT) ? 0x0008 : 0); 181 182 if (!(ncpr & 0x0003)) { 183 SCOOP_DEV[skt->nr].keep_rd = 0; 184 } else if (!SCOOP_DEV[skt->nr].keep_rd) { 185 if (nccr & 0x0080) 186 SCOOP_DEV[skt->nr].keep_rd = 1; 187 else 188 nccr |= 0x0080; 189 } 190 191 if (mcr != nmcr) 192 write_scoop_reg(scoop, SCOOP_MCR, nmcr); 193 if (cpr != ncpr) { 194 if (platform_scoop_config->power_ctrl) 195 platform_scoop_config->power_ctrl(scoop, ncpr , skt->nr); 196 else 197 write_scoop_reg(scoop, SCOOP_CPR, ncpr); 198 } 199 if (ccr != nccr) 200 write_scoop_reg(scoop, SCOOP_CCR, nccr); 201 if (imr != nimr) 202 write_scoop_reg(scoop, SCOOP_IMR, nimr); 203 204 local_irq_restore(flags); 205 206 return 0; 207 } 208 209 static void sharpsl_pcmcia_socket_init(struct soc_pcmcia_socket *skt) 210 { 211 sharpsl_pcmcia_init_reset(&SCOOP_DEV[skt->nr]); 212 213 /* Enable interrupt */ 214 write_scoop_reg(SCOOP_DEV[skt->nr].dev, SCOOP_IMR, 0x00C0); 215 write_scoop_reg(SCOOP_DEV[skt->nr].dev, SCOOP_MCR, 0x0101); 216 SCOOP_DEV[skt->nr].keep_vs = NO_KEEP_VS; 217 218 if (machine_is_collie()) 219 /* We need to disable SS_OUTPUT_ENA here. */ 220 write_scoop_reg(SCOOP_DEV[skt->nr].dev, SCOOP_CPR, read_scoop_reg(SCOOP_DEV[skt->nr].dev, SCOOP_CPR) & ~0x0080); 221 } 222 223 static void sharpsl_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt) 224 { 225 /* CF_BUS_OFF */ 226 sharpsl_pcmcia_init_reset(&SCOOP_DEV[skt->nr]); 227 228 if (machine_is_collie()) 229 /* We need to disable SS_OUTPUT_ENA here. */ 230 write_scoop_reg(SCOOP_DEV[skt->nr].dev, SCOOP_CPR, read_scoop_reg(SCOOP_DEV[skt->nr].dev, SCOOP_CPR) & ~0x0080); 231 } 232 233 static struct pcmcia_low_level sharpsl_pcmcia_ops = { 234 .owner = THIS_MODULE, 235 .hw_init = sharpsl_pcmcia_hw_init, 236 .hw_shutdown = sharpsl_pcmcia_hw_shutdown, 237 .socket_state = sharpsl_pcmcia_socket_state, 238 .configure_socket = sharpsl_pcmcia_configure_socket, 239 .socket_init = sharpsl_pcmcia_socket_init, 240 .socket_suspend = sharpsl_pcmcia_socket_suspend, 241 .first = 0, 242 .nr = 0, 243 }; 244 245 #ifdef CONFIG_SA1100_COLLIE 246 #include "sa11xx_base.h" 247 248 int __init pcmcia_collie_init(struct device *dev) 249 { 250 int ret = -ENODEV; 251 252 if (machine_is_collie()) 253 ret = sa11xx_drv_pcmcia_probe(dev, &sharpsl_pcmcia_ops, 0, 1); 254 255 return ret; 256 } 257 258 #else 259 260 static struct platform_device *sharpsl_pcmcia_device; 261 262 static int __init sharpsl_pcmcia_init(void) 263 { 264 int ret; 265 266 sharpsl_pcmcia_ops.nr=platform_scoop_config->num_devs; 267 sharpsl_pcmcia_device = kmalloc(sizeof(*sharpsl_pcmcia_device), GFP_KERNEL); 268 if (!sharpsl_pcmcia_device) 269 return -ENOMEM; 270 271 memset(sharpsl_pcmcia_device, 0, sizeof(*sharpsl_pcmcia_device)); 272 sharpsl_pcmcia_device->name = "pxa2xx-pcmcia"; 273 sharpsl_pcmcia_device->dev.platform_data = &sharpsl_pcmcia_ops; 274 sharpsl_pcmcia_device->dev.parent=platform_scoop_config->devs[0].dev; 275 276 ret = platform_device_register(sharpsl_pcmcia_device); 277 if (ret) 278 kfree(sharpsl_pcmcia_device); 279 280 return ret; 281 } 282 283 static void __exit sharpsl_pcmcia_exit(void) 284 { 285 /* 286 * This call is supposed to free our sharpsl_pcmcia_device. 287 * Unfortunately platform_device don't have a free method, and 288 * we can't assume it's free of any reference at this point so we 289 * can't free it either. 290 */ 291 platform_device_unregister(sharpsl_pcmcia_device); 292 } 293 294 fs_initcall(sharpsl_pcmcia_init); 295 module_exit(sharpsl_pcmcia_exit); 296 #endif 297 298 MODULE_DESCRIPTION("Sharp SL Series PCMCIA Support"); 299 MODULE_LICENSE("GPL"); 300