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