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 24 #include <asm/hardware/scoop.h> 25 #include <asm/arch/corgi.h> 26 #include <asm/arch/pxa-regs.h> 27 28 #include "soc_common.h" 29 30 #define NO_KEEP_VS 0x0001 31 32 static unsigned char keep_vs; 33 static unsigned char keep_rd; 34 35 static struct pcmcia_irqs irqs[] = { 36 { 0, CORGI_IRQ_GPIO_CF_CD, "PCMCIA0 CD"}, 37 }; 38 39 static void sharpsl_pcmcia_init_reset(void) 40 { 41 reset_scoop(&corgiscoop_device.dev); 42 keep_vs = NO_KEEP_VS; 43 keep_rd = 0; 44 } 45 46 static int sharpsl_pcmcia_hw_init(struct soc_pcmcia_socket *skt) 47 { 48 int ret; 49 50 /* 51 * Setup default state of GPIO outputs 52 * before we enable them as outputs. 53 */ 54 GPSR(GPIO48_nPOE) = 55 GPIO_bit(GPIO48_nPOE) | 56 GPIO_bit(GPIO49_nPWE) | 57 GPIO_bit(GPIO50_nPIOR) | 58 GPIO_bit(GPIO51_nPIOW) | 59 GPIO_bit(GPIO52_nPCE_1) | 60 GPIO_bit(GPIO53_nPCE_2); 61 62 pxa_gpio_mode(GPIO48_nPOE_MD); 63 pxa_gpio_mode(GPIO49_nPWE_MD); 64 pxa_gpio_mode(GPIO50_nPIOR_MD); 65 pxa_gpio_mode(GPIO51_nPIOW_MD); 66 pxa_gpio_mode(GPIO52_nPCE_1_MD); 67 pxa_gpio_mode(GPIO53_nPCE_2_MD); 68 pxa_gpio_mode(GPIO54_pSKTSEL_MD); 69 pxa_gpio_mode(GPIO55_nPREG_MD); 70 pxa_gpio_mode(GPIO56_nPWAIT_MD); 71 pxa_gpio_mode(GPIO57_nIOIS16_MD); 72 73 /* Register interrupts */ 74 ret = soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs)); 75 76 if (ret) { 77 printk(KERN_ERR "Request for Compact Flash IRQ failed\n"); 78 return ret; 79 } 80 81 /* Enable interrupt */ 82 write_scoop_reg(&corgiscoop_device.dev, SCOOP_IMR, 0x00C0); 83 write_scoop_reg(&corgiscoop_device.dev, SCOOP_MCR, 0x0101); 84 keep_vs = NO_KEEP_VS; 85 86 skt->irq = CORGI_IRQ_GPIO_CF_IRQ; 87 88 return 0; 89 } 90 91 static void sharpsl_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt) 92 { 93 soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs)); 94 95 /* CF_BUS_OFF */ 96 sharpsl_pcmcia_init_reset(); 97 } 98 99 100 static void sharpsl_pcmcia_socket_state(struct soc_pcmcia_socket *skt, 101 struct pcmcia_state *state) 102 { 103 unsigned short cpr, csr; 104 105 cpr = read_scoop_reg(&corgiscoop_device.dev, SCOOP_CPR); 106 107 write_scoop_reg(&corgiscoop_device.dev, SCOOP_IRM, 0x00FF); 108 write_scoop_reg(&corgiscoop_device.dev, SCOOP_ISR, 0x0000); 109 write_scoop_reg(&corgiscoop_device.dev, SCOOP_IRM, 0x0000); 110 csr = read_scoop_reg(&corgiscoop_device.dev, SCOOP_CSR); 111 if (csr & 0x0004) { 112 /* card eject */ 113 write_scoop_reg(&corgiscoop_device.dev, SCOOP_CDR, 0x0000); 114 keep_vs = NO_KEEP_VS; 115 } 116 else if (!(keep_vs & NO_KEEP_VS)) { 117 /* keep vs1,vs2 */ 118 write_scoop_reg(&corgiscoop_device.dev, SCOOP_CDR, 0x0000); 119 csr |= keep_vs; 120 } 121 else if (cpr & 0x0003) { 122 /* power on */ 123 write_scoop_reg(&corgiscoop_device.dev, SCOOP_CDR, 0x0000); 124 keep_vs = (csr & 0x00C0); 125 } 126 else { 127 /* card detect */ 128 write_scoop_reg(&corgiscoop_device.dev, SCOOP_CDR, 0x0002); 129 } 130 131 state->detect = (csr & 0x0004) ? 0 : 1; 132 state->ready = (csr & 0x0002) ? 1 : 0; 133 state->bvd1 = (csr & 0x0010) ? 1 : 0; 134 state->bvd2 = (csr & 0x0020) ? 1 : 0; 135 state->wrprot = (csr & 0x0008) ? 1 : 0; 136 state->vs_3v = (csr & 0x0040) ? 0 : 1; 137 state->vs_Xv = (csr & 0x0080) ? 0 : 1; 138 139 if ((cpr & 0x0080) && ((cpr & 0x8040) != 0x8040)) { 140 printk(KERN_ERR "sharpsl_pcmcia_socket_state(): CPR=%04X, Low voltage!\n", cpr); 141 } 142 143 } 144 145 146 static int sharpsl_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, 147 const socket_state_t *state) 148 { 149 unsigned long flags; 150 151 unsigned short cpr, ncpr, ccr, nccr, mcr, nmcr, imr, nimr; 152 153 switch (state->Vcc) { 154 case 0: break; 155 case 33: break; 156 case 50: break; 157 default: 158 printk(KERN_ERR "sharpsl_pcmcia_configure_socket(): bad Vcc %u\n", state->Vcc); 159 return -1; 160 } 161 162 if ((state->Vpp!=state->Vcc) && (state->Vpp!=0)) { 163 printk(KERN_ERR "CF slot cannot support Vpp %u\n", state->Vpp); 164 return -1; 165 } 166 167 local_irq_save(flags); 168 169 nmcr = (mcr = read_scoop_reg(&corgiscoop_device.dev, SCOOP_MCR)) & ~0x0010; 170 ncpr = (cpr = read_scoop_reg(&corgiscoop_device.dev, SCOOP_CPR)) & ~0x0083; 171 nccr = (ccr = read_scoop_reg(&corgiscoop_device.dev, SCOOP_CCR)) & ~0x0080; 172 nimr = (imr = read_scoop_reg(&corgiscoop_device.dev, SCOOP_IMR)) & ~0x003E; 173 174 ncpr |= (state->Vcc == 33) ? 0x0001 : 175 (state->Vcc == 50) ? 0x0002 : 0; 176 nmcr |= (state->flags&SS_IOCARD) ? 0x0010 : 0; 177 ncpr |= (state->flags&SS_OUTPUT_ENA) ? 0x0080 : 0; 178 nccr |= (state->flags&SS_RESET)? 0x0080: 0; 179 nimr |= ((skt->status&SS_DETECT) ? 0x0004 : 0)| 180 ((skt->status&SS_READY) ? 0x0002 : 0)| 181 ((skt->status&SS_BATDEAD)? 0x0010 : 0)| 182 ((skt->status&SS_BATWARN)? 0x0020 : 0)| 183 ((skt->status&SS_STSCHG) ? 0x0010 : 0)| 184 ((skt->status&SS_WRPROT) ? 0x0008 : 0); 185 186 if (!(ncpr & 0x0003)) { 187 keep_rd = 0; 188 } else if (!keep_rd) { 189 if (nccr & 0x0080) 190 keep_rd = 1; 191 else 192 nccr |= 0x0080; 193 } 194 195 if (mcr != nmcr) 196 write_scoop_reg(&corgiscoop_device.dev, SCOOP_MCR, nmcr); 197 if (cpr != ncpr) 198 write_scoop_reg(&corgiscoop_device.dev, SCOOP_CPR, ncpr); 199 if (ccr != nccr) 200 write_scoop_reg(&corgiscoop_device.dev, SCOOP_CCR, nccr); 201 if (imr != nimr) 202 write_scoop_reg(&corgiscoop_device.dev, 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 } 212 213 static void sharpsl_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt) 214 { 215 } 216 217 static struct pcmcia_low_level sharpsl_pcmcia_ops = { 218 .owner = THIS_MODULE, 219 .hw_init = sharpsl_pcmcia_hw_init, 220 .hw_shutdown = sharpsl_pcmcia_hw_shutdown, 221 .socket_state = sharpsl_pcmcia_socket_state, 222 .configure_socket = sharpsl_pcmcia_configure_socket, 223 .socket_init = sharpsl_pcmcia_socket_init, 224 .socket_suspend = sharpsl_pcmcia_socket_suspend, 225 .first = 0, 226 .nr = 1, 227 }; 228 229 static struct platform_device *sharpsl_pcmcia_device; 230 231 static int __init sharpsl_pcmcia_init(void) 232 { 233 int ret; 234 235 sharpsl_pcmcia_device = kmalloc(sizeof(*sharpsl_pcmcia_device), GFP_KERNEL); 236 if (!sharpsl_pcmcia_device) 237 return -ENOMEM; 238 memset(sharpsl_pcmcia_device, 0, sizeof(*sharpsl_pcmcia_device)); 239 sharpsl_pcmcia_device->name = "pxa2xx-pcmcia"; 240 sharpsl_pcmcia_device->dev.platform_data = &sharpsl_pcmcia_ops; 241 242 ret = platform_device_register(sharpsl_pcmcia_device); 243 if (ret) 244 kfree(sharpsl_pcmcia_device); 245 246 return ret; 247 } 248 249 static void __exit sharpsl_pcmcia_exit(void) 250 { 251 /* 252 * This call is supposed to free our sharpsl_pcmcia_device. 253 * Unfortunately platform_device don't have a free method, and 254 * we can't assume it's free of any reference at this point so we 255 * can't free it either. 256 */ 257 platform_device_unregister(sharpsl_pcmcia_device); 258 } 259 260 module_init(sharpsl_pcmcia_init); 261 module_exit(sharpsl_pcmcia_exit); 262 263 MODULE_DESCRIPTION("Sharp SL Series PCMCIA Support"); 264 MODULE_LICENSE("GPL"); 265