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 <mach/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 /* Register interrupts */ 52 if (SCOOP_DEV[skt->nr].cd_irq >= 0) { 53 struct pcmcia_irqs cd_irq; 54 55 cd_irq.sock = skt->nr; 56 cd_irq.irq = SCOOP_DEV[skt->nr].cd_irq; 57 cd_irq.str = SCOOP_DEV[skt->nr].cd_irq_str; 58 ret = soc_pcmcia_request_irqs(skt, &cd_irq, 1); 59 60 if (ret) { 61 printk(KERN_ERR "Request for Compact Flash IRQ failed\n"); 62 return ret; 63 } 64 } 65 66 skt->socket.pci_irq = SCOOP_DEV[skt->nr].irq; 67 68 return 0; 69 } 70 71 static void sharpsl_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt) 72 { 73 if (SCOOP_DEV[skt->nr].cd_irq >= 0) { 74 struct pcmcia_irqs cd_irq; 75 76 cd_irq.sock = skt->nr; 77 cd_irq.irq = SCOOP_DEV[skt->nr].cd_irq; 78 cd_irq.str = SCOOP_DEV[skt->nr].cd_irq_str; 79 soc_pcmcia_free_irqs(skt, &cd_irq, 1); 80 } 81 } 82 83 84 static void sharpsl_pcmcia_socket_state(struct soc_pcmcia_socket *skt, 85 struct pcmcia_state *state) 86 { 87 unsigned short cpr, csr; 88 struct device *scoop = SCOOP_DEV[skt->nr].dev; 89 90 cpr = read_scoop_reg(SCOOP_DEV[skt->nr].dev, SCOOP_CPR); 91 92 write_scoop_reg(scoop, SCOOP_IRM, 0x00FF); 93 write_scoop_reg(scoop, SCOOP_ISR, 0x0000); 94 write_scoop_reg(scoop, SCOOP_IRM, 0x0000); 95 csr = read_scoop_reg(scoop, SCOOP_CSR); 96 if (csr & 0x0004) { 97 /* card eject */ 98 write_scoop_reg(scoop, SCOOP_CDR, 0x0000); 99 SCOOP_DEV[skt->nr].keep_vs = NO_KEEP_VS; 100 } 101 else if (!(SCOOP_DEV[skt->nr].keep_vs & NO_KEEP_VS)) { 102 /* keep vs1,vs2 */ 103 write_scoop_reg(scoop, SCOOP_CDR, 0x0000); 104 csr |= SCOOP_DEV[skt->nr].keep_vs; 105 } 106 else if (cpr & 0x0003) { 107 /* power on */ 108 write_scoop_reg(scoop, SCOOP_CDR, 0x0000); 109 SCOOP_DEV[skt->nr].keep_vs = (csr & 0x00C0); 110 } 111 else { 112 /* card detect */ 113 if ((machine_is_spitz() || machine_is_borzoi()) && skt->nr == 1) { 114 write_scoop_reg(scoop, SCOOP_CDR, 0x0000); 115 } else { 116 write_scoop_reg(scoop, SCOOP_CDR, 0x0002); 117 } 118 } 119 120 state->detect = (csr & 0x0004) ? 0 : 1; 121 state->ready = (csr & 0x0002) ? 1 : 0; 122 state->bvd1 = (csr & 0x0010) ? 1 : 0; 123 state->bvd2 = (csr & 0x0020) ? 1 : 0; 124 state->wrprot = (csr & 0x0008) ? 1 : 0; 125 state->vs_3v = (csr & 0x0040) ? 0 : 1; 126 state->vs_Xv = (csr & 0x0080) ? 0 : 1; 127 128 if ((cpr & 0x0080) && ((cpr & 0x8040) != 0x8040)) { 129 printk(KERN_ERR "sharpsl_pcmcia_socket_state(): CPR=%04X, Low voltage!\n", cpr); 130 } 131 } 132 133 134 static int sharpsl_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, 135 const socket_state_t *state) 136 { 137 unsigned long flags; 138 struct device *scoop = SCOOP_DEV[skt->nr].dev; 139 140 unsigned short cpr, ncpr, ccr, nccr, mcr, nmcr, imr, nimr; 141 142 switch (state->Vcc) { 143 case 0: break; 144 case 33: break; 145 case 50: break; 146 default: 147 printk(KERN_ERR "sharpsl_pcmcia_configure_socket(): bad Vcc %u\n", state->Vcc); 148 return -1; 149 } 150 151 if ((state->Vpp!=state->Vcc) && (state->Vpp!=0)) { 152 printk(KERN_ERR "CF slot cannot support Vpp %u\n", state->Vpp); 153 return -1; 154 } 155 156 local_irq_save(flags); 157 158 nmcr = (mcr = read_scoop_reg(scoop, SCOOP_MCR)) & ~0x0010; 159 ncpr = (cpr = read_scoop_reg(scoop, SCOOP_CPR)) & ~0x0083; 160 nccr = (ccr = read_scoop_reg(scoop, SCOOP_CCR)) & ~0x0080; 161 nimr = (imr = read_scoop_reg(scoop, SCOOP_IMR)) & ~0x003E; 162 163 if ((machine_is_spitz() || machine_is_borzoi() || machine_is_akita()) && skt->nr == 0) { 164 ncpr |= (state->Vcc == 33) ? 0x0002 : 165 (state->Vcc == 50) ? 0x0002 : 0; 166 } else { 167 ncpr |= (state->Vcc == 33) ? 0x0001 : 168 (state->Vcc == 50) ? 0x0002 : 0; 169 } 170 nmcr |= (state->flags&SS_IOCARD) ? 0x0010 : 0; 171 ncpr |= (state->flags&SS_OUTPUT_ENA) ? 0x0080 : 0; 172 nccr |= (state->flags&SS_RESET)? 0x0080: 0; 173 nimr |= ((skt->status&SS_DETECT) ? 0x0004 : 0)| 174 ((skt->status&SS_READY) ? 0x0002 : 0)| 175 ((skt->status&SS_BATDEAD)? 0x0010 : 0)| 176 ((skt->status&SS_BATWARN)? 0x0020 : 0)| 177 ((skt->status&SS_STSCHG) ? 0x0010 : 0)| 178 ((skt->status&SS_WRPROT) ? 0x0008 : 0); 179 180 if (!(ncpr & 0x0003)) { 181 SCOOP_DEV[skt->nr].keep_rd = 0; 182 } else if (!SCOOP_DEV[skt->nr].keep_rd) { 183 if (nccr & 0x0080) 184 SCOOP_DEV[skt->nr].keep_rd = 1; 185 else 186 nccr |= 0x0080; 187 } 188 189 if (mcr != nmcr) 190 write_scoop_reg(scoop, SCOOP_MCR, nmcr); 191 if (cpr != ncpr) { 192 if (platform_scoop_config->power_ctrl) 193 platform_scoop_config->power_ctrl(scoop, ncpr , skt->nr); 194 else 195 write_scoop_reg(scoop, SCOOP_CPR, ncpr); 196 } 197 if (ccr != nccr) 198 write_scoop_reg(scoop, SCOOP_CCR, nccr); 199 if (imr != nimr) 200 write_scoop_reg(scoop, SCOOP_IMR, nimr); 201 202 local_irq_restore(flags); 203 204 return 0; 205 } 206 207 static void sharpsl_pcmcia_socket_init(struct soc_pcmcia_socket *skt) 208 { 209 sharpsl_pcmcia_init_reset(skt); 210 211 /* Enable interrupt */ 212 write_scoop_reg(SCOOP_DEV[skt->nr].dev, SCOOP_IMR, 0x00C0); 213 write_scoop_reg(SCOOP_DEV[skt->nr].dev, SCOOP_MCR, 0x0101); 214 SCOOP_DEV[skt->nr].keep_vs = NO_KEEP_VS; 215 } 216 217 static void sharpsl_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt) 218 { 219 sharpsl_pcmcia_init_reset(skt); 220 } 221 222 static struct pcmcia_low_level sharpsl_pcmcia_ops __initdata = { 223 .owner = THIS_MODULE, 224 .hw_init = sharpsl_pcmcia_hw_init, 225 .hw_shutdown = sharpsl_pcmcia_hw_shutdown, 226 .socket_state = sharpsl_pcmcia_socket_state, 227 .configure_socket = sharpsl_pcmcia_configure_socket, 228 .socket_init = sharpsl_pcmcia_socket_init, 229 .socket_suspend = sharpsl_pcmcia_socket_suspend, 230 .first = 0, 231 .nr = 0, 232 }; 233 234 #ifdef CONFIG_SA1100_COLLIE 235 #include "sa11xx_base.h" 236 237 int __devinit pcmcia_collie_init(struct device *dev) 238 { 239 int ret = -ENODEV; 240 241 if (machine_is_collie()) 242 ret = sa11xx_drv_pcmcia_probe(dev, &sharpsl_pcmcia_ops, 0, 1); 243 244 return ret; 245 } 246 247 #else 248 249 static struct platform_device *sharpsl_pcmcia_device; 250 251 static int __init sharpsl_pcmcia_init(void) 252 { 253 int ret; 254 255 if (!platform_scoop_config) 256 return -ENODEV; 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 ret = platform_device_add_data(sharpsl_pcmcia_device, 265 &sharpsl_pcmcia_ops, sizeof(sharpsl_pcmcia_ops)); 266 if (ret == 0) { 267 sharpsl_pcmcia_device->dev.parent = platform_scoop_config->devs[0].dev; 268 ret = platform_device_add(sharpsl_pcmcia_device); 269 } 270 271 if (ret) 272 platform_device_put(sharpsl_pcmcia_device); 273 274 return ret; 275 } 276 277 static void __exit sharpsl_pcmcia_exit(void) 278 { 279 platform_device_unregister(sharpsl_pcmcia_device); 280 } 281 282 fs_initcall(sharpsl_pcmcia_init); 283 module_exit(sharpsl_pcmcia_exit); 284 #endif 285 286 MODULE_DESCRIPTION("Sharp SL Series PCMCIA Support"); 287 MODULE_LICENSE("GPL"); 288 MODULE_ALIAS("platform:pxa2xx-pcmcia"); 289