1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * linux/drivers/pcmcia/sa1111_generic.c 4 * 5 * We implement the generic parts of a SA1111 PCMCIA driver. This 6 * basically means we handle everything except controlling the 7 * power. Power is machine specific... 8 */ 9 #include <linux/module.h> 10 #include <linux/kernel.h> 11 #include <linux/ioport.h> 12 #include <linux/device.h> 13 #include <linux/interrupt.h> 14 #include <linux/init.h> 15 #include <linux/io.h> 16 #include <linux/slab.h> 17 18 #include <pcmcia/ss.h> 19 20 #include <asm/hardware/sa1111.h> 21 #include <asm/mach-types.h> 22 #include <asm/irq.h> 23 24 #include "sa1111_generic.h" 25 26 /* 27 * These are offsets from the above base. 28 */ 29 #define PCCR 0x0000 30 #define PCSSR 0x0004 31 #define PCSR 0x0008 32 33 #define PCSR_S0_READY (1<<0) 34 #define PCSR_S1_READY (1<<1) 35 #define PCSR_S0_DETECT (1<<2) 36 #define PCSR_S1_DETECT (1<<3) 37 #define PCSR_S0_VS1 (1<<4) 38 #define PCSR_S0_VS2 (1<<5) 39 #define PCSR_S1_VS1 (1<<6) 40 #define PCSR_S1_VS2 (1<<7) 41 #define PCSR_S0_WP (1<<8) 42 #define PCSR_S1_WP (1<<9) 43 #define PCSR_S0_BVD1 (1<<10) 44 #define PCSR_S0_BVD2 (1<<11) 45 #define PCSR_S1_BVD1 (1<<12) 46 #define PCSR_S1_BVD2 (1<<13) 47 48 #define PCCR_S0_RST (1<<0) 49 #define PCCR_S1_RST (1<<1) 50 #define PCCR_S0_FLT (1<<2) 51 #define PCCR_S1_FLT (1<<3) 52 #define PCCR_S0_PWAITEN (1<<4) 53 #define PCCR_S1_PWAITEN (1<<5) 54 #define PCCR_S0_PSE (1<<6) 55 #define PCCR_S1_PSE (1<<7) 56 57 #define PCSSR_S0_SLEEP (1<<0) 58 #define PCSSR_S1_SLEEP (1<<1) 59 60 #define IDX_IRQ_S0_READY_NINT (0) 61 #define IDX_IRQ_S0_CD_VALID (1) 62 #define IDX_IRQ_S0_BVD1_STSCHG (2) 63 #define IDX_IRQ_S1_READY_NINT (3) 64 #define IDX_IRQ_S1_CD_VALID (4) 65 #define IDX_IRQ_S1_BVD1_STSCHG (5) 66 #define NUM_IRQS (6) 67 68 void sa1111_pcmcia_socket_state(struct soc_pcmcia_socket *skt, struct pcmcia_state *state) 69 { 70 struct sa1111_pcmcia_socket *s = to_skt(skt); 71 u32 status = readl_relaxed(s->dev->mapbase + PCSR); 72 73 switch (skt->nr) { 74 case 0: 75 state->detect = status & PCSR_S0_DETECT ? 0 : 1; 76 state->ready = status & PCSR_S0_READY ? 1 : 0; 77 state->bvd1 = status & PCSR_S0_BVD1 ? 1 : 0; 78 state->bvd2 = status & PCSR_S0_BVD2 ? 1 : 0; 79 state->wrprot = status & PCSR_S0_WP ? 1 : 0; 80 state->vs_3v = status & PCSR_S0_VS1 ? 0 : 1; 81 state->vs_Xv = status & PCSR_S0_VS2 ? 0 : 1; 82 break; 83 84 case 1: 85 state->detect = status & PCSR_S1_DETECT ? 0 : 1; 86 state->ready = status & PCSR_S1_READY ? 1 : 0; 87 state->bvd1 = status & PCSR_S1_BVD1 ? 1 : 0; 88 state->bvd2 = status & PCSR_S1_BVD2 ? 1 : 0; 89 state->wrprot = status & PCSR_S1_WP ? 1 : 0; 90 state->vs_3v = status & PCSR_S1_VS1 ? 0 : 1; 91 state->vs_Xv = status & PCSR_S1_VS2 ? 0 : 1; 92 break; 93 } 94 } 95 96 int sa1111_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state) 97 { 98 struct sa1111_pcmcia_socket *s = to_skt(skt); 99 u32 pccr_skt_mask, pccr_set_mask, val; 100 unsigned long flags; 101 102 switch (skt->nr) { 103 case 0: 104 pccr_skt_mask = PCCR_S0_RST|PCCR_S0_FLT|PCCR_S0_PWAITEN|PCCR_S0_PSE; 105 break; 106 107 case 1: 108 pccr_skt_mask = PCCR_S1_RST|PCCR_S1_FLT|PCCR_S1_PWAITEN|PCCR_S1_PSE; 109 break; 110 111 default: 112 return -1; 113 } 114 115 pccr_set_mask = 0; 116 117 if (state->Vcc != 0) 118 pccr_set_mask |= PCCR_S0_PWAITEN|PCCR_S1_PWAITEN; 119 if (state->Vcc == 50) 120 pccr_set_mask |= PCCR_S0_PSE|PCCR_S1_PSE; 121 if (state->flags & SS_RESET) 122 pccr_set_mask |= PCCR_S0_RST|PCCR_S1_RST; 123 if (state->flags & SS_OUTPUT_ENA) 124 pccr_set_mask |= PCCR_S0_FLT|PCCR_S1_FLT; 125 126 local_irq_save(flags); 127 val = readl_relaxed(s->dev->mapbase + PCCR); 128 val &= ~pccr_skt_mask; 129 val |= pccr_set_mask & pccr_skt_mask; 130 writel_relaxed(val, s->dev->mapbase + PCCR); 131 local_irq_restore(flags); 132 133 return 0; 134 } 135 136 int sa1111_pcmcia_add(struct sa1111_dev *dev, struct pcmcia_low_level *ops, 137 int (*add)(struct soc_pcmcia_socket *)) 138 { 139 struct sa1111_pcmcia_socket *s; 140 struct clk *clk; 141 int i, ret = 0, irqs[NUM_IRQS]; 142 143 clk = devm_clk_get(&dev->dev, NULL); 144 if (IS_ERR(clk)) 145 return PTR_ERR(clk); 146 147 for (i = 0; i < NUM_IRQS; i++) { 148 irqs[i] = sa1111_get_irq(dev, i); 149 if (irqs[i] <= 0) 150 return irqs[i] ? : -ENXIO; 151 } 152 153 ops->socket_state = sa1111_pcmcia_socket_state; 154 155 for (i = 0; i < ops->nr; i++) { 156 s = kzalloc(sizeof(*s), GFP_KERNEL); 157 if (!s) 158 return -ENOMEM; 159 160 s->soc.nr = ops->first + i; 161 s->soc.clk = clk; 162 163 soc_pcmcia_init_one(&s->soc, ops, &dev->dev); 164 s->dev = dev; 165 if (s->soc.nr) { 166 s->soc.socket.pci_irq = irqs[IDX_IRQ_S1_READY_NINT]; 167 s->soc.stat[SOC_STAT_CD].irq = irqs[IDX_IRQ_S1_CD_VALID]; 168 s->soc.stat[SOC_STAT_CD].name = "SA1111 CF card detect"; 169 s->soc.stat[SOC_STAT_BVD1].irq = irqs[IDX_IRQ_S1_BVD1_STSCHG]; 170 s->soc.stat[SOC_STAT_BVD1].name = "SA1111 CF BVD1"; 171 } else { 172 s->soc.socket.pci_irq = irqs[IDX_IRQ_S0_READY_NINT]; 173 s->soc.stat[SOC_STAT_CD].irq = irqs[IDX_IRQ_S0_CD_VALID]; 174 s->soc.stat[SOC_STAT_CD].name = "SA1111 PCMCIA card detect"; 175 s->soc.stat[SOC_STAT_BVD1].irq = irqs[IDX_IRQ_S0_BVD1_STSCHG]; 176 s->soc.stat[SOC_STAT_BVD1].name = "SA1111 PCMCIA BVD1"; 177 } 178 179 ret = add(&s->soc); 180 if (ret == 0) { 181 s->next = dev_get_drvdata(&dev->dev); 182 dev_set_drvdata(&dev->dev, s); 183 } else 184 kfree(s); 185 } 186 187 return ret; 188 } 189 190 static int pcmcia_probe(struct sa1111_dev *dev) 191 { 192 void __iomem *base; 193 int ret; 194 195 ret = sa1111_enable_device(dev); 196 if (ret) 197 return ret; 198 199 dev_set_drvdata(&dev->dev, NULL); 200 201 if (!request_mem_region(dev->res.start, 512, SA1111_DRIVER_NAME(dev))) { 202 sa1111_disable_device(dev); 203 return -EBUSY; 204 } 205 206 base = dev->mapbase; 207 208 /* 209 * Initialise the suspend state. 210 */ 211 writel_relaxed(PCSSR_S0_SLEEP | PCSSR_S1_SLEEP, base + PCSSR); 212 writel_relaxed(PCCR_S0_FLT | PCCR_S1_FLT, base + PCCR); 213 214 ret = -ENODEV; 215 #ifdef CONFIG_SA1100_JORNADA720 216 if (machine_is_jornada720()) 217 ret = pcmcia_jornada720_init(dev); 218 #endif 219 #ifdef CONFIG_ASSABET_NEPONSET 220 if (machine_is_assabet()) 221 ret = pcmcia_neponset_init(dev); 222 #endif 223 224 if (ret) { 225 release_mem_region(dev->res.start, 512); 226 sa1111_disable_device(dev); 227 } 228 229 return ret; 230 } 231 232 static void pcmcia_remove(struct sa1111_dev *dev) 233 { 234 struct sa1111_pcmcia_socket *next, *s = dev_get_drvdata(&dev->dev); 235 236 dev_set_drvdata(&dev->dev, NULL); 237 238 for (; s; s = next) { 239 next = s->next; 240 soc_pcmcia_remove_one(&s->soc); 241 kfree(s); 242 } 243 244 release_mem_region(dev->res.start, 512); 245 sa1111_disable_device(dev); 246 } 247 248 static struct sa1111_driver pcmcia_driver = { 249 .drv = { 250 .name = "sa1111-pcmcia", 251 }, 252 .devid = SA1111_DEVID_PCMCIA, 253 .probe = pcmcia_probe, 254 .remove = pcmcia_remove, 255 }; 256 257 static int __init sa1111_drv_pcmcia_init(void) 258 { 259 return sa1111_driver_register(&pcmcia_driver); 260 } 261 262 static void __exit sa1111_drv_pcmcia_exit(void) 263 { 264 sa1111_driver_unregister(&pcmcia_driver); 265 } 266 267 fs_initcall(sa1111_drv_pcmcia_init); 268 module_exit(sa1111_drv_pcmcia_exit); 269 270 MODULE_DESCRIPTION("SA1111 PCMCIA card socket driver"); 271 MODULE_LICENSE("GPL"); 272