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 <mach/hardware.h> 19 #include <asm/irq.h> 20 #include <asm/hardware/scoop.h> 21 22 #include "soc_common.h" 23 24 #define NO_KEEP_VS 0x0001 25 #define SCOOP_DEV platform_scoop_config->devs 26 27 static void sharpsl_pcmcia_init_reset(struct soc_pcmcia_socket *skt) 28 { 29 struct scoop_pcmcia_dev *scoopdev = &SCOOP_DEV[skt->nr]; 30 31 reset_scoop(scoopdev->dev); 32 33 /* Shared power controls need to be handled carefully */ 34 if (platform_scoop_config->power_ctrl) 35 platform_scoop_config->power_ctrl(scoopdev->dev, 0x0000, skt->nr); 36 else 37 write_scoop_reg(scoopdev->dev, SCOOP_CPR, 0x0000); 38 39 scoopdev->keep_vs = NO_KEEP_VS; 40 scoopdev->keep_rd = 0; 41 } 42 43 static int sharpsl_pcmcia_hw_init(struct soc_pcmcia_socket *skt) 44 { 45 if (SCOOP_DEV[skt->nr].cd_irq >= 0) { 46 skt->stat[SOC_STAT_CD].irq = SCOOP_DEV[skt->nr].cd_irq; 47 skt->stat[SOC_STAT_CD].name = SCOOP_DEV[skt->nr].cd_irq_str; 48 } 49 50 skt->socket.pci_irq = SCOOP_DEV[skt->nr].irq; 51 52 return 0; 53 } 54 55 static void sharpsl_pcmcia_socket_state(struct soc_pcmcia_socket *skt, 56 struct pcmcia_state *state) 57 { 58 unsigned short cpr, csr; 59 struct device *scoop = SCOOP_DEV[skt->nr].dev; 60 61 cpr = read_scoop_reg(SCOOP_DEV[skt->nr].dev, SCOOP_CPR); 62 63 write_scoop_reg(scoop, SCOOP_IRM, 0x00FF); 64 write_scoop_reg(scoop, SCOOP_ISR, 0x0000); 65 write_scoop_reg(scoop, SCOOP_IRM, 0x0000); 66 csr = read_scoop_reg(scoop, SCOOP_CSR); 67 if (csr & 0x0004) { 68 /* card eject */ 69 write_scoop_reg(scoop, SCOOP_CDR, 0x0000); 70 SCOOP_DEV[skt->nr].keep_vs = NO_KEEP_VS; 71 } 72 else if (!(SCOOP_DEV[skt->nr].keep_vs & NO_KEEP_VS)) { 73 /* keep vs1,vs2 */ 74 write_scoop_reg(scoop, SCOOP_CDR, 0x0000); 75 csr |= SCOOP_DEV[skt->nr].keep_vs; 76 } 77 else if (cpr & 0x0003) { 78 /* power on */ 79 write_scoop_reg(scoop, SCOOP_CDR, 0x0000); 80 SCOOP_DEV[skt->nr].keep_vs = (csr & 0x00C0); 81 } 82 else { 83 /* card detect */ 84 if ((machine_is_spitz() || machine_is_borzoi()) && skt->nr == 1) { 85 write_scoop_reg(scoop, SCOOP_CDR, 0x0000); 86 } else { 87 write_scoop_reg(scoop, SCOOP_CDR, 0x0002); 88 } 89 } 90 91 state->detect = (csr & 0x0004) ? 0 : 1; 92 state->ready = (csr & 0x0002) ? 1 : 0; 93 state->bvd1 = (csr & 0x0010) ? 1 : 0; 94 state->bvd2 = (csr & 0x0020) ? 1 : 0; 95 state->wrprot = (csr & 0x0008) ? 1 : 0; 96 state->vs_3v = (csr & 0x0040) ? 0 : 1; 97 state->vs_Xv = (csr & 0x0080) ? 0 : 1; 98 99 if ((cpr & 0x0080) && ((cpr & 0x8040) != 0x8040)) { 100 printk(KERN_ERR "sharpsl_pcmcia_socket_state(): CPR=%04X, Low voltage!\n", cpr); 101 } 102 } 103 104 105 static int sharpsl_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, 106 const socket_state_t *state) 107 { 108 unsigned long flags; 109 struct device *scoop = SCOOP_DEV[skt->nr].dev; 110 111 unsigned short cpr, ncpr, ccr, nccr, mcr, nmcr, imr, nimr; 112 113 switch (state->Vcc) { 114 case 0: break; 115 case 33: break; 116 case 50: break; 117 default: 118 printk(KERN_ERR "sharpsl_pcmcia_configure_socket(): bad Vcc %u\n", state->Vcc); 119 return -1; 120 } 121 122 if ((state->Vpp!=state->Vcc) && (state->Vpp!=0)) { 123 printk(KERN_ERR "CF slot cannot support Vpp %u\n", state->Vpp); 124 return -1; 125 } 126 127 local_irq_save(flags); 128 129 nmcr = (mcr = read_scoop_reg(scoop, SCOOP_MCR)) & ~0x0010; 130 ncpr = (cpr = read_scoop_reg(scoop, SCOOP_CPR)) & ~0x0083; 131 nccr = (ccr = read_scoop_reg(scoop, SCOOP_CCR)) & ~0x0080; 132 nimr = (imr = read_scoop_reg(scoop, SCOOP_IMR)) & ~0x003E; 133 134 if ((machine_is_spitz() || machine_is_borzoi() || machine_is_akita()) && skt->nr == 0) { 135 ncpr |= (state->Vcc == 33) ? 0x0002 : 136 (state->Vcc == 50) ? 0x0002 : 0; 137 } else { 138 ncpr |= (state->Vcc == 33) ? 0x0001 : 139 (state->Vcc == 50) ? 0x0002 : 0; 140 } 141 nmcr |= (state->flags&SS_IOCARD) ? 0x0010 : 0; 142 ncpr |= (state->flags&SS_OUTPUT_ENA) ? 0x0080 : 0; 143 nccr |= (state->flags&SS_RESET)? 0x0080: 0; 144 nimr |= ((skt->status&SS_DETECT) ? 0x0004 : 0)| 145 ((skt->status&SS_READY) ? 0x0002 : 0)| 146 ((skt->status&SS_BATDEAD)? 0x0010 : 0)| 147 ((skt->status&SS_BATWARN)? 0x0020 : 0)| 148 ((skt->status&SS_STSCHG) ? 0x0010 : 0)| 149 ((skt->status&SS_WRPROT) ? 0x0008 : 0); 150 151 if (!(ncpr & 0x0003)) { 152 SCOOP_DEV[skt->nr].keep_rd = 0; 153 } else if (!SCOOP_DEV[skt->nr].keep_rd) { 154 if (nccr & 0x0080) 155 SCOOP_DEV[skt->nr].keep_rd = 1; 156 else 157 nccr |= 0x0080; 158 } 159 160 if (mcr != nmcr) 161 write_scoop_reg(scoop, SCOOP_MCR, nmcr); 162 if (cpr != ncpr) { 163 if (platform_scoop_config->power_ctrl) 164 platform_scoop_config->power_ctrl(scoop, ncpr , skt->nr); 165 else 166 write_scoop_reg(scoop, SCOOP_CPR, ncpr); 167 } 168 if (ccr != nccr) 169 write_scoop_reg(scoop, SCOOP_CCR, nccr); 170 if (imr != nimr) 171 write_scoop_reg(scoop, SCOOP_IMR, nimr); 172 173 local_irq_restore(flags); 174 175 return 0; 176 } 177 178 static void sharpsl_pcmcia_socket_init(struct soc_pcmcia_socket *skt) 179 { 180 sharpsl_pcmcia_init_reset(skt); 181 182 /* Enable interrupt */ 183 write_scoop_reg(SCOOP_DEV[skt->nr].dev, SCOOP_IMR, 0x00C0); 184 write_scoop_reg(SCOOP_DEV[skt->nr].dev, SCOOP_MCR, 0x0101); 185 SCOOP_DEV[skt->nr].keep_vs = NO_KEEP_VS; 186 } 187 188 static void sharpsl_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt) 189 { 190 sharpsl_pcmcia_init_reset(skt); 191 } 192 193 static struct pcmcia_low_level sharpsl_pcmcia_ops = { 194 .owner = THIS_MODULE, 195 .hw_init = sharpsl_pcmcia_hw_init, 196 .socket_state = sharpsl_pcmcia_socket_state, 197 .configure_socket = sharpsl_pcmcia_configure_socket, 198 .socket_init = sharpsl_pcmcia_socket_init, 199 .socket_suspend = sharpsl_pcmcia_socket_suspend, 200 .first = 0, 201 .nr = 0, 202 }; 203 204 #ifdef CONFIG_SA1100_COLLIE 205 #include "sa11xx_base.h" 206 207 int pcmcia_collie_init(struct device *dev) 208 { 209 int ret = -ENODEV; 210 211 if (machine_is_collie()) 212 ret = sa11xx_drv_pcmcia_probe(dev, &sharpsl_pcmcia_ops, 0, 1); 213 214 return ret; 215 } 216 217 #else 218 219 static struct platform_device *sharpsl_pcmcia_device; 220 221 static int __init sharpsl_pcmcia_init(void) 222 { 223 int ret; 224 225 if (!platform_scoop_config) 226 return -ENODEV; 227 228 sharpsl_pcmcia_ops.nr = platform_scoop_config->num_devs; 229 sharpsl_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1); 230 231 if (!sharpsl_pcmcia_device) 232 return -ENOMEM; 233 234 ret = platform_device_add_data(sharpsl_pcmcia_device, 235 &sharpsl_pcmcia_ops, sizeof(sharpsl_pcmcia_ops)); 236 if (ret == 0) { 237 sharpsl_pcmcia_device->dev.parent = platform_scoop_config->devs[0].dev; 238 ret = platform_device_add(sharpsl_pcmcia_device); 239 } 240 241 if (ret) 242 platform_device_put(sharpsl_pcmcia_device); 243 244 return ret; 245 } 246 247 static void __exit sharpsl_pcmcia_exit(void) 248 { 249 platform_device_unregister(sharpsl_pcmcia_device); 250 } 251 252 fs_initcall(sharpsl_pcmcia_init); 253 module_exit(sharpsl_pcmcia_exit); 254 #endif 255 256 MODULE_DESCRIPTION("Sharp SL Series PCMCIA Support"); 257 MODULE_LICENSE("GPL"); 258 MODULE_ALIAS("platform:pxa2xx-pcmcia"); 259