1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Sharp SL-C7xx Series PCMCIA routines 4 * 5 * Copyright (c) 2004-2005 Richard Purdie 6 * 7 * Based on Sharp's 2.4 kernel patches and pxa2xx_mainstone.c 8 */ 9 10 #include <linux/module.h> 11 #include <linux/init.h> 12 #include <linux/kernel.h> 13 #include <linux/errno.h> 14 #include <linux/interrupt.h> 15 #include <linux/platform_device.h> 16 17 #include <asm/mach-types.h> 18 #include <asm/irq.h> 19 #include <asm/hardware/scoop.h> 20 21 #include <pcmcia/soc_common.h> 22 23 #define NO_KEEP_VS 0x0001 24 #define SCOOP_DEV platform_scoop_config->devs 25 26 static void sharpsl_pcmcia_init_reset(struct soc_pcmcia_socket *skt) 27 { 28 struct scoop_pcmcia_dev *scoopdev = &SCOOP_DEV[skt->nr]; 29 30 reset_scoop(scoopdev->dev); 31 32 /* Shared power controls need to be handled carefully */ 33 if (platform_scoop_config->power_ctrl) 34 platform_scoop_config->power_ctrl(scoopdev->dev, 0x0000, skt->nr); 35 else 36 write_scoop_reg(scoopdev->dev, SCOOP_CPR, 0x0000); 37 38 scoopdev->keep_vs = NO_KEEP_VS; 39 scoopdev->keep_rd = 0; 40 } 41 42 static int sharpsl_pcmcia_hw_init(struct soc_pcmcia_socket *skt) 43 { 44 if (SCOOP_DEV[skt->nr].cd_irq >= 0) { 45 skt->stat[SOC_STAT_CD].irq = SCOOP_DEV[skt->nr].cd_irq; 46 skt->stat[SOC_STAT_CD].name = SCOOP_DEV[skt->nr].cd_irq_str; 47 } 48 49 skt->socket.pci_irq = SCOOP_DEV[skt->nr].irq; 50 51 return 0; 52 } 53 54 static void sharpsl_pcmcia_socket_state(struct soc_pcmcia_socket *skt, 55 struct pcmcia_state *state) 56 { 57 unsigned short cpr, csr; 58 struct device *scoop = SCOOP_DEV[skt->nr].dev; 59 60 cpr = read_scoop_reg(SCOOP_DEV[skt->nr].dev, SCOOP_CPR); 61 62 write_scoop_reg(scoop, SCOOP_IRM, 0x00FF); 63 write_scoop_reg(scoop, SCOOP_ISR, 0x0000); 64 write_scoop_reg(scoop, SCOOP_IRM, 0x0000); 65 csr = read_scoop_reg(scoop, SCOOP_CSR); 66 if (csr & 0x0004) { 67 /* card eject */ 68 write_scoop_reg(scoop, SCOOP_CDR, 0x0000); 69 SCOOP_DEV[skt->nr].keep_vs = NO_KEEP_VS; 70 } 71 else if (!(SCOOP_DEV[skt->nr].keep_vs & NO_KEEP_VS)) { 72 /* keep vs1,vs2 */ 73 write_scoop_reg(scoop, SCOOP_CDR, 0x0000); 74 csr |= SCOOP_DEV[skt->nr].keep_vs; 75 } 76 else if (cpr & 0x0003) { 77 /* power on */ 78 write_scoop_reg(scoop, SCOOP_CDR, 0x0000); 79 SCOOP_DEV[skt->nr].keep_vs = (csr & 0x00C0); 80 } 81 else { 82 /* card detect */ 83 if ((machine_is_spitz() || machine_is_borzoi()) && skt->nr == 1) { 84 write_scoop_reg(scoop, SCOOP_CDR, 0x0000); 85 } else { 86 write_scoop_reg(scoop, SCOOP_CDR, 0x0002); 87 } 88 } 89 90 state->detect = (csr & 0x0004) ? 0 : 1; 91 state->ready = (csr & 0x0002) ? 1 : 0; 92 state->bvd1 = (csr & 0x0010) ? 1 : 0; 93 state->bvd2 = (csr & 0x0020) ? 1 : 0; 94 state->wrprot = (csr & 0x0008) ? 1 : 0; 95 state->vs_3v = (csr & 0x0040) ? 0 : 1; 96 state->vs_Xv = (csr & 0x0080) ? 0 : 1; 97 98 if ((cpr & 0x0080) && ((cpr & 0x8040) != 0x8040)) { 99 printk(KERN_ERR "sharpsl_pcmcia_socket_state(): CPR=%04X, Low voltage!\n", cpr); 100 } 101 } 102 103 104 static int sharpsl_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, 105 const socket_state_t *state) 106 { 107 unsigned long flags; 108 struct device *scoop = SCOOP_DEV[skt->nr].dev; 109 110 unsigned short cpr, ncpr, ccr, nccr, mcr, nmcr, imr, nimr; 111 112 switch (state->Vcc) { 113 case 0: break; 114 case 33: break; 115 case 50: break; 116 default: 117 printk(KERN_ERR "sharpsl_pcmcia_configure_socket(): bad Vcc %u\n", state->Vcc); 118 return -1; 119 } 120 121 if ((state->Vpp!=state->Vcc) && (state->Vpp!=0)) { 122 printk(KERN_ERR "CF slot cannot support Vpp %u\n", state->Vpp); 123 return -1; 124 } 125 126 local_irq_save(flags); 127 128 nmcr = (mcr = read_scoop_reg(scoop, SCOOP_MCR)) & ~0x0010; 129 ncpr = (cpr = read_scoop_reg(scoop, SCOOP_CPR)) & ~0x0083; 130 nccr = (ccr = read_scoop_reg(scoop, SCOOP_CCR)) & ~0x0080; 131 nimr = (imr = read_scoop_reg(scoop, SCOOP_IMR)) & ~0x003E; 132 133 if ((machine_is_spitz() || machine_is_borzoi() || machine_is_akita()) && skt->nr == 0) { 134 ncpr |= (state->Vcc == 33) ? 0x0002 : 135 (state->Vcc == 50) ? 0x0002 : 0; 136 } else { 137 ncpr |= (state->Vcc == 33) ? 0x0001 : 138 (state->Vcc == 50) ? 0x0002 : 0; 139 } 140 nmcr |= (state->flags&SS_IOCARD) ? 0x0010 : 0; 141 ncpr |= (state->flags&SS_OUTPUT_ENA) ? 0x0080 : 0; 142 nccr |= (state->flags&SS_RESET)? 0x0080: 0; 143 nimr |= ((skt->status&SS_DETECT) ? 0x0004 : 0)| 144 ((skt->status&SS_READY) ? 0x0002 : 0)| 145 ((skt->status&SS_BATDEAD)? 0x0010 : 0)| 146 ((skt->status&SS_BATWARN)? 0x0020 : 0)| 147 ((skt->status&SS_STSCHG) ? 0x0010 : 0)| 148 ((skt->status&SS_WRPROT) ? 0x0008 : 0); 149 150 if (!(ncpr & 0x0003)) { 151 SCOOP_DEV[skt->nr].keep_rd = 0; 152 } else if (!SCOOP_DEV[skt->nr].keep_rd) { 153 if (nccr & 0x0080) 154 SCOOP_DEV[skt->nr].keep_rd = 1; 155 else 156 nccr |= 0x0080; 157 } 158 159 if (mcr != nmcr) 160 write_scoop_reg(scoop, SCOOP_MCR, nmcr); 161 if (cpr != ncpr) { 162 if (platform_scoop_config->power_ctrl) 163 platform_scoop_config->power_ctrl(scoop, ncpr , skt->nr); 164 else 165 write_scoop_reg(scoop, SCOOP_CPR, ncpr); 166 } 167 if (ccr != nccr) 168 write_scoop_reg(scoop, SCOOP_CCR, nccr); 169 if (imr != nimr) 170 write_scoop_reg(scoop, SCOOP_IMR, nimr); 171 172 local_irq_restore(flags); 173 174 return 0; 175 } 176 177 static void sharpsl_pcmcia_socket_init(struct soc_pcmcia_socket *skt) 178 { 179 sharpsl_pcmcia_init_reset(skt); 180 181 /* Enable interrupt */ 182 write_scoop_reg(SCOOP_DEV[skt->nr].dev, SCOOP_IMR, 0x00C0); 183 write_scoop_reg(SCOOP_DEV[skt->nr].dev, SCOOP_MCR, 0x0101); 184 SCOOP_DEV[skt->nr].keep_vs = NO_KEEP_VS; 185 } 186 187 static void sharpsl_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt) 188 { 189 sharpsl_pcmcia_init_reset(skt); 190 } 191 192 static struct pcmcia_low_level sharpsl_pcmcia_ops = { 193 .owner = THIS_MODULE, 194 .hw_init = sharpsl_pcmcia_hw_init, 195 .socket_state = sharpsl_pcmcia_socket_state, 196 .configure_socket = sharpsl_pcmcia_configure_socket, 197 .socket_init = sharpsl_pcmcia_socket_init, 198 .socket_suspend = sharpsl_pcmcia_socket_suspend, 199 .first = 0, 200 .nr = 0, 201 }; 202 203 #ifdef CONFIG_SA1100_COLLIE 204 #include "sa11xx_base.h" 205 206 int pcmcia_collie_init(struct device *dev) 207 { 208 int ret = -ENODEV; 209 210 if (machine_is_collie()) 211 ret = sa11xx_drv_pcmcia_probe(dev, &sharpsl_pcmcia_ops, 0, 1); 212 213 return ret; 214 } 215 216 #else 217 218 static struct platform_device *sharpsl_pcmcia_device; 219 220 static int __init sharpsl_pcmcia_init(void) 221 { 222 int ret; 223 224 if (!platform_scoop_config) 225 return -ENODEV; 226 227 sharpsl_pcmcia_ops.nr = platform_scoop_config->num_devs; 228 sharpsl_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1); 229 230 if (!sharpsl_pcmcia_device) 231 return -ENOMEM; 232 233 ret = platform_device_add_data(sharpsl_pcmcia_device, 234 &sharpsl_pcmcia_ops, sizeof(sharpsl_pcmcia_ops)); 235 if (ret == 0) { 236 sharpsl_pcmcia_device->dev.parent = platform_scoop_config->devs[0].dev; 237 ret = platform_device_add(sharpsl_pcmcia_device); 238 } 239 240 if (ret) 241 platform_device_put(sharpsl_pcmcia_device); 242 243 return ret; 244 } 245 246 static void __exit sharpsl_pcmcia_exit(void) 247 { 248 platform_device_unregister(sharpsl_pcmcia_device); 249 } 250 251 fs_initcall(sharpsl_pcmcia_init); 252 module_exit(sharpsl_pcmcia_exit); 253 #endif 254 255 MODULE_DESCRIPTION("Sharp SL Series PCMCIA Support"); 256 MODULE_LICENSE("GPL"); 257 MODULE_ALIAS("platform:pxa2xx-pcmcia"); 258