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/device.h> 20 21 #include <asm/hardware.h> 22 #include <asm/irq.h> 23 #include <asm/hardware/scoop.h> 24 #include <asm/arch/pxa-regs.h> 25 26 #include "soc_common.h" 27 28 #define NO_KEEP_VS 0x0001 29 30 static void sharpsl_pcmcia_init_reset(struct scoop_pcmcia_dev *scoopdev) 31 { 32 reset_scoop(scoopdev->dev); 33 scoopdev->keep_vs = NO_KEEP_VS; 34 scoopdev->keep_rd = 0; 35 } 36 37 static int sharpsl_pcmcia_hw_init(struct soc_pcmcia_socket *skt) 38 { 39 int ret; 40 41 /* 42 * Setup default state of GPIO outputs 43 * before we enable them as outputs. 44 */ 45 GPSR(GPIO48_nPOE) = 46 GPIO_bit(GPIO48_nPOE) | 47 GPIO_bit(GPIO49_nPWE) | 48 GPIO_bit(GPIO50_nPIOR) | 49 GPIO_bit(GPIO51_nPIOW) | 50 GPIO_bit(GPIO52_nPCE_1) | 51 GPIO_bit(GPIO53_nPCE_2); 52 53 pxa_gpio_mode(GPIO48_nPOE_MD); 54 pxa_gpio_mode(GPIO49_nPWE_MD); 55 pxa_gpio_mode(GPIO50_nPIOR_MD); 56 pxa_gpio_mode(GPIO51_nPIOW_MD); 57 pxa_gpio_mode(GPIO52_nPCE_1_MD); 58 pxa_gpio_mode(GPIO53_nPCE_2_MD); 59 pxa_gpio_mode(GPIO54_pSKTSEL_MD); 60 pxa_gpio_mode(GPIO55_nPREG_MD); 61 pxa_gpio_mode(GPIO56_nPWAIT_MD); 62 pxa_gpio_mode(GPIO57_nIOIS16_MD); 63 64 /* Register interrupts */ 65 if (scoop_devs[skt->nr].cd_irq >= 0) { 66 struct pcmcia_irqs cd_irq; 67 68 cd_irq.sock = skt->nr; 69 cd_irq.irq = scoop_devs[skt->nr].cd_irq; 70 cd_irq.str = scoop_devs[skt->nr].cd_irq_str; 71 ret = soc_pcmcia_request_irqs(skt, &cd_irq, 1); 72 73 if (ret) { 74 printk(KERN_ERR "Request for Compact Flash IRQ failed\n"); 75 return ret; 76 } 77 } 78 79 skt->irq = scoop_devs[skt->nr].irq; 80 81 return 0; 82 } 83 84 static void sharpsl_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt) 85 { 86 if (scoop_devs[skt->nr].cd_irq >= 0) { 87 struct pcmcia_irqs cd_irq; 88 89 cd_irq.sock = skt->nr; 90 cd_irq.irq = scoop_devs[skt->nr].cd_irq; 91 cd_irq.str = scoop_devs[skt->nr].cd_irq_str; 92 soc_pcmcia_free_irqs(skt, &cd_irq, 1); 93 } 94 } 95 96 97 static void sharpsl_pcmcia_socket_state(struct soc_pcmcia_socket *skt, 98 struct pcmcia_state *state) 99 { 100 unsigned short cpr, csr; 101 struct device *scoop = scoop_devs[skt->nr].dev; 102 103 cpr = read_scoop_reg(scoop_devs[skt->nr].dev, SCOOP_CPR); 104 105 write_scoop_reg(scoop, SCOOP_IRM, 0x00FF); 106 write_scoop_reg(scoop, SCOOP_ISR, 0x0000); 107 write_scoop_reg(scoop, SCOOP_IRM, 0x0000); 108 csr = read_scoop_reg(scoop, SCOOP_CSR); 109 if (csr & 0x0004) { 110 /* card eject */ 111 write_scoop_reg(scoop, SCOOP_CDR, 0x0000); 112 scoop_devs[skt->nr].keep_vs = NO_KEEP_VS; 113 } 114 else if (!(scoop_devs[skt->nr].keep_vs & NO_KEEP_VS)) { 115 /* keep vs1,vs2 */ 116 write_scoop_reg(scoop, SCOOP_CDR, 0x0000); 117 csr |= scoop_devs[skt->nr].keep_vs; 118 } 119 else if (cpr & 0x0003) { 120 /* power on */ 121 write_scoop_reg(scoop, SCOOP_CDR, 0x0000); 122 scoop_devs[skt->nr].keep_vs = (csr & 0x00C0); 123 } 124 else { 125 /* card detect */ 126 write_scoop_reg(scoop, SCOOP_CDR, 0x0002); 127 } 128 129 state->detect = (csr & 0x0004) ? 0 : 1; 130 state->ready = (csr & 0x0002) ? 1 : 0; 131 state->bvd1 = (csr & 0x0010) ? 1 : 0; 132 state->bvd2 = (csr & 0x0020) ? 1 : 0; 133 state->wrprot = (csr & 0x0008) ? 1 : 0; 134 state->vs_3v = (csr & 0x0040) ? 0 : 1; 135 state->vs_Xv = (csr & 0x0080) ? 0 : 1; 136 137 if ((cpr & 0x0080) && ((cpr & 0x8040) != 0x8040)) { 138 printk(KERN_ERR "sharpsl_pcmcia_socket_state(): CPR=%04X, Low voltage!\n", cpr); 139 } 140 141 } 142 143 144 static int sharpsl_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, 145 const socket_state_t *state) 146 { 147 unsigned long flags; 148 struct device *scoop = scoop_devs[skt->nr].dev; 149 150 unsigned short cpr, ncpr, ccr, nccr, mcr, nmcr, imr, nimr; 151 152 switch (state->Vcc) { 153 case 0: break; 154 case 33: break; 155 case 50: break; 156 default: 157 printk(KERN_ERR "sharpsl_pcmcia_configure_socket(): bad Vcc %u\n", state->Vcc); 158 return -1; 159 } 160 161 if ((state->Vpp!=state->Vcc) && (state->Vpp!=0)) { 162 printk(KERN_ERR "CF slot cannot support Vpp %u\n", state->Vpp); 163 return -1; 164 } 165 166 local_irq_save(flags); 167 168 nmcr = (mcr = read_scoop_reg(scoop, SCOOP_MCR)) & ~0x0010; 169 ncpr = (cpr = read_scoop_reg(scoop, SCOOP_CPR)) & ~0x0083; 170 nccr = (ccr = read_scoop_reg(scoop, SCOOP_CCR)) & ~0x0080; 171 nimr = (imr = read_scoop_reg(scoop, SCOOP_IMR)) & ~0x003E; 172 173 ncpr |= (state->Vcc == 33) ? 0x0001 : 174 (state->Vcc == 50) ? 0x0002 : 0; 175 nmcr |= (state->flags&SS_IOCARD) ? 0x0010 : 0; 176 ncpr |= (state->flags&SS_OUTPUT_ENA) ? 0x0080 : 0; 177 nccr |= (state->flags&SS_RESET)? 0x0080: 0; 178 nimr |= ((skt->status&SS_DETECT) ? 0x0004 : 0)| 179 ((skt->status&SS_READY) ? 0x0002 : 0)| 180 ((skt->status&SS_BATDEAD)? 0x0010 : 0)| 181 ((skt->status&SS_BATWARN)? 0x0020 : 0)| 182 ((skt->status&SS_STSCHG) ? 0x0010 : 0)| 183 ((skt->status&SS_WRPROT) ? 0x0008 : 0); 184 185 if (!(ncpr & 0x0003)) { 186 scoop_devs[skt->nr].keep_rd = 0; 187 } else if (!scoop_devs[skt->nr].keep_rd) { 188 if (nccr & 0x0080) 189 scoop_devs[skt->nr].keep_rd = 1; 190 else 191 nccr |= 0x0080; 192 } 193 194 if (mcr != nmcr) 195 write_scoop_reg(scoop, SCOOP_MCR, nmcr); 196 if (cpr != ncpr) 197 write_scoop_reg(scoop, SCOOP_CPR, ncpr); 198 if (ccr != nccr) 199 write_scoop_reg(scoop, SCOOP_CCR, nccr); 200 if (imr != nimr) 201 write_scoop_reg(scoop, SCOOP_IMR, nimr); 202 203 local_irq_restore(flags); 204 205 return 0; 206 } 207 208 static void sharpsl_pcmcia_socket_init(struct soc_pcmcia_socket *skt) 209 { 210 sharpsl_pcmcia_init_reset(&scoop_devs[skt->nr]); 211 212 /* Enable interrupt */ 213 write_scoop_reg(scoop_devs[skt->nr].dev, SCOOP_IMR, 0x00C0); 214 write_scoop_reg(scoop_devs[skt->nr].dev, SCOOP_MCR, 0x0101); 215 scoop_devs[skt->nr].keep_vs = NO_KEEP_VS; 216 } 217 218 static void sharpsl_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt) 219 { 220 /* CF_BUS_OFF */ 221 sharpsl_pcmcia_init_reset(&scoop_devs[skt->nr]); 222 } 223 224 static struct pcmcia_low_level sharpsl_pcmcia_ops = { 225 .owner = THIS_MODULE, 226 .hw_init = sharpsl_pcmcia_hw_init, 227 .hw_shutdown = sharpsl_pcmcia_hw_shutdown, 228 .socket_state = sharpsl_pcmcia_socket_state, 229 .configure_socket = sharpsl_pcmcia_configure_socket, 230 .socket_init = sharpsl_pcmcia_socket_init, 231 .socket_suspend = sharpsl_pcmcia_socket_suspend, 232 .first = 0, 233 .nr = 0, 234 }; 235 236 static struct platform_device *sharpsl_pcmcia_device; 237 238 static int __init sharpsl_pcmcia_init(void) 239 { 240 int ret; 241 242 sharpsl_pcmcia_ops.nr=scoop_num; 243 sharpsl_pcmcia_device = kmalloc(sizeof(*sharpsl_pcmcia_device), GFP_KERNEL); 244 if (!sharpsl_pcmcia_device) 245 return -ENOMEM; 246 247 memset(sharpsl_pcmcia_device, 0, sizeof(*sharpsl_pcmcia_device)); 248 sharpsl_pcmcia_device->name = "pxa2xx-pcmcia"; 249 sharpsl_pcmcia_device->dev.platform_data = &sharpsl_pcmcia_ops; 250 sharpsl_pcmcia_device->dev.parent=scoop_devs[0].dev; 251 252 ret = platform_device_register(sharpsl_pcmcia_device); 253 if (ret) 254 kfree(sharpsl_pcmcia_device); 255 256 return ret; 257 } 258 259 static void __exit sharpsl_pcmcia_exit(void) 260 { 261 /* 262 * This call is supposed to free our sharpsl_pcmcia_device. 263 * Unfortunately platform_device don't have a free method, and 264 * we can't assume it's free of any reference at this point so we 265 * can't free it either. 266 */ 267 platform_device_unregister(sharpsl_pcmcia_device); 268 } 269 270 fs_initcall(sharpsl_pcmcia_init); 271 module_exit(sharpsl_pcmcia_exit); 272 273 MODULE_DESCRIPTION("Sharp SL Series PCMCIA Support"); 274 MODULE_LICENSE("GPL"); 275