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 #define SCOOP_DEV platform_scoop_config->devs 30 31 static void sharpsl_pcmcia_init_reset(struct soc_pcmcia_socket *skt) 32 { 33 struct scoop_pcmcia_dev *scoopdev = &SCOOP_DEV[skt->nr]; 34 35 reset_scoop(scoopdev->dev); 36 37 /* Shared power controls need to be handled carefully */ 38 if (platform_scoop_config->power_ctrl) 39 platform_scoop_config->power_ctrl(scoopdev->dev, 0x0000, skt->nr); 40 else 41 write_scoop_reg(scoopdev->dev, SCOOP_CPR, 0x0000); 42 43 scoopdev->keep_vs = NO_KEEP_VS; 44 scoopdev->keep_rd = 0; 45 } 46 47 static int sharpsl_pcmcia_hw_init(struct soc_pcmcia_socket *skt) 48 { 49 int ret; 50 51 if (platform_scoop_config->pcmcia_init) 52 platform_scoop_config->pcmcia_init(); 53 54 /* Register interrupts */ 55 if (SCOOP_DEV[skt->nr].cd_irq >= 0) { 56 struct pcmcia_irqs cd_irq; 57 58 cd_irq.sock = skt->nr; 59 cd_irq.irq = SCOOP_DEV[skt->nr].cd_irq; 60 cd_irq.str = SCOOP_DEV[skt->nr].cd_irq_str; 61 ret = soc_pcmcia_request_irqs(skt, &cd_irq, 1); 62 63 if (ret) { 64 printk(KERN_ERR "Request for Compact Flash IRQ failed\n"); 65 return ret; 66 } 67 } 68 69 skt->irq = SCOOP_DEV[skt->nr].irq; 70 71 return 0; 72 } 73 74 static void sharpsl_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt) 75 { 76 if (SCOOP_DEV[skt->nr].cd_irq >= 0) { 77 struct pcmcia_irqs cd_irq; 78 79 cd_irq.sock = skt->nr; 80 cd_irq.irq = SCOOP_DEV[skt->nr].cd_irq; 81 cd_irq.str = SCOOP_DEV[skt->nr].cd_irq_str; 82 soc_pcmcia_free_irqs(skt, &cd_irq, 1); 83 } 84 } 85 86 87 static void sharpsl_pcmcia_socket_state(struct soc_pcmcia_socket *skt, 88 struct pcmcia_state *state) 89 { 90 unsigned short cpr, csr; 91 struct device *scoop = SCOOP_DEV[skt->nr].dev; 92 93 cpr = read_scoop_reg(SCOOP_DEV[skt->nr].dev, SCOOP_CPR); 94 95 write_scoop_reg(scoop, SCOOP_IRM, 0x00FF); 96 write_scoop_reg(scoop, SCOOP_ISR, 0x0000); 97 write_scoop_reg(scoop, SCOOP_IRM, 0x0000); 98 csr = read_scoop_reg(scoop, SCOOP_CSR); 99 if (csr & 0x0004) { 100 /* card eject */ 101 write_scoop_reg(scoop, SCOOP_CDR, 0x0000); 102 SCOOP_DEV[skt->nr].keep_vs = NO_KEEP_VS; 103 } 104 else if (!(SCOOP_DEV[skt->nr].keep_vs & NO_KEEP_VS)) { 105 /* keep vs1,vs2 */ 106 write_scoop_reg(scoop, SCOOP_CDR, 0x0000); 107 csr |= SCOOP_DEV[skt->nr].keep_vs; 108 } 109 else if (cpr & 0x0003) { 110 /* power on */ 111 write_scoop_reg(scoop, SCOOP_CDR, 0x0000); 112 SCOOP_DEV[skt->nr].keep_vs = (csr & 0x00C0); 113 } 114 else { 115 /* card detect */ 116 if ((machine_is_spitz() || machine_is_borzoi()) && skt->nr == 1) { 117 write_scoop_reg(scoop, SCOOP_CDR, 0x0000); 118 } else { 119 write_scoop_reg(scoop, SCOOP_CDR, 0x0002); 120 } 121 } 122 123 state->detect = (csr & 0x0004) ? 0 : 1; 124 state->ready = (csr & 0x0002) ? 1 : 0; 125 state->bvd1 = (csr & 0x0010) ? 1 : 0; 126 state->bvd2 = (csr & 0x0020) ? 1 : 0; 127 state->wrprot = (csr & 0x0008) ? 1 : 0; 128 state->vs_3v = (csr & 0x0040) ? 0 : 1; 129 state->vs_Xv = (csr & 0x0080) ? 0 : 1; 130 131 if ((cpr & 0x0080) && ((cpr & 0x8040) != 0x8040)) { 132 printk(KERN_ERR "sharpsl_pcmcia_socket_state(): CPR=%04X, Low voltage!\n", cpr); 133 } 134 } 135 136 137 static int sharpsl_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, 138 const socket_state_t *state) 139 { 140 unsigned long flags; 141 struct device *scoop = SCOOP_DEV[skt->nr].dev; 142 143 unsigned short cpr, ncpr, ccr, nccr, mcr, nmcr, imr, nimr; 144 145 switch (state->Vcc) { 146 case 0: break; 147 case 33: break; 148 case 50: break; 149 default: 150 printk(KERN_ERR "sharpsl_pcmcia_configure_socket(): bad Vcc %u\n", state->Vcc); 151 return -1; 152 } 153 154 if ((state->Vpp!=state->Vcc) && (state->Vpp!=0)) { 155 printk(KERN_ERR "CF slot cannot support Vpp %u\n", state->Vpp); 156 return -1; 157 } 158 159 local_irq_save(flags); 160 161 nmcr = (mcr = read_scoop_reg(scoop, SCOOP_MCR)) & ~0x0010; 162 ncpr = (cpr = read_scoop_reg(scoop, SCOOP_CPR)) & ~0x0083; 163 nccr = (ccr = read_scoop_reg(scoop, SCOOP_CCR)) & ~0x0080; 164 nimr = (imr = read_scoop_reg(scoop, SCOOP_IMR)) & ~0x003E; 165 166 if ((machine_is_spitz() || machine_is_borzoi() || machine_is_akita()) && skt->nr == 0) { 167 ncpr |= (state->Vcc == 33) ? 0x0002 : 168 (state->Vcc == 50) ? 0x0002 : 0; 169 } else { 170 ncpr |= (state->Vcc == 33) ? 0x0001 : 171 (state->Vcc == 50) ? 0x0002 : 0; 172 } 173 nmcr |= (state->flags&SS_IOCARD) ? 0x0010 : 0; 174 ncpr |= (state->flags&SS_OUTPUT_ENA) ? 0x0080 : 0; 175 nccr |= (state->flags&SS_RESET)? 0x0080: 0; 176 nimr |= ((skt->status&SS_DETECT) ? 0x0004 : 0)| 177 ((skt->status&SS_READY) ? 0x0002 : 0)| 178 ((skt->status&SS_BATDEAD)? 0x0010 : 0)| 179 ((skt->status&SS_BATWARN)? 0x0020 : 0)| 180 ((skt->status&SS_STSCHG) ? 0x0010 : 0)| 181 ((skt->status&SS_WRPROT) ? 0x0008 : 0); 182 183 if (!(ncpr & 0x0003)) { 184 SCOOP_DEV[skt->nr].keep_rd = 0; 185 } else if (!SCOOP_DEV[skt->nr].keep_rd) { 186 if (nccr & 0x0080) 187 SCOOP_DEV[skt->nr].keep_rd = 1; 188 else 189 nccr |= 0x0080; 190 } 191 192 if (mcr != nmcr) 193 write_scoop_reg(scoop, SCOOP_MCR, nmcr); 194 if (cpr != ncpr) { 195 if (platform_scoop_config->power_ctrl) 196 platform_scoop_config->power_ctrl(scoop, ncpr , skt->nr); 197 else 198 write_scoop_reg(scoop, SCOOP_CPR, ncpr); 199 } 200 if (ccr != nccr) 201 write_scoop_reg(scoop, SCOOP_CCR, nccr); 202 if (imr != nimr) 203 write_scoop_reg(scoop, SCOOP_IMR, nimr); 204 205 local_irq_restore(flags); 206 207 return 0; 208 } 209 210 static void sharpsl_pcmcia_socket_init(struct soc_pcmcia_socket *skt) 211 { 212 sharpsl_pcmcia_init_reset(skt); 213 214 /* Enable interrupt */ 215 write_scoop_reg(SCOOP_DEV[skt->nr].dev, SCOOP_IMR, 0x00C0); 216 write_scoop_reg(SCOOP_DEV[skt->nr].dev, SCOOP_MCR, 0x0101); 217 SCOOP_DEV[skt->nr].keep_vs = NO_KEEP_VS; 218 } 219 220 static void sharpsl_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt) 221 { 222 sharpsl_pcmcia_init_reset(skt); 223 } 224 225 static struct pcmcia_low_level sharpsl_pcmcia_ops = { 226 .owner = THIS_MODULE, 227 .hw_init = sharpsl_pcmcia_hw_init, 228 .hw_shutdown = sharpsl_pcmcia_hw_shutdown, 229 .socket_state = sharpsl_pcmcia_socket_state, 230 .configure_socket = sharpsl_pcmcia_configure_socket, 231 .socket_init = sharpsl_pcmcia_socket_init, 232 .socket_suspend = sharpsl_pcmcia_socket_suspend, 233 .first = 0, 234 .nr = 0, 235 }; 236 237 #ifdef CONFIG_SA1100_COLLIE 238 #include "sa11xx_base.h" 239 240 int __init pcmcia_collie_init(struct device *dev) 241 { 242 int ret = -ENODEV; 243 244 if (machine_is_collie()) 245 ret = sa11xx_drv_pcmcia_probe(dev, &sharpsl_pcmcia_ops, 0, 1); 246 247 return ret; 248 } 249 250 #else 251 252 static struct platform_device *sharpsl_pcmcia_device; 253 254 static int __init sharpsl_pcmcia_init(void) 255 { 256 int ret; 257 258 sharpsl_pcmcia_ops.nr = platform_scoop_config->num_devs; 259 sharpsl_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1); 260 261 if (!sharpsl_pcmcia_device) 262 return -ENOMEM; 263 264 sharpsl_pcmcia_device->dev.platform_data = &sharpsl_pcmcia_ops; 265 sharpsl_pcmcia_device->dev.parent = platform_scoop_config->devs[0].dev; 266 267 ret = platform_device_add(sharpsl_pcmcia_device); 268 269 if (ret) 270 platform_device_put(sharpsl_pcmcia_device); 271 272 return ret; 273 } 274 275 static void __exit sharpsl_pcmcia_exit(void) 276 { 277 platform_device_unregister(sharpsl_pcmcia_device); 278 } 279 280 fs_initcall(sharpsl_pcmcia_init); 281 module_exit(sharpsl_pcmcia_exit); 282 #endif 283 284 MODULE_DESCRIPTION("Sharp SL Series PCMCIA Support"); 285 MODULE_LICENSE("GPL"); 286 MODULE_ALIAS("platform:pxa2xx-pcmcia"); 287