drivers/pcmcia/sa1111_generic.c

0001 // SPDX-License-Identifier: GPL-2.0-only
0002 /*
0003  * linux/drivers/pcmcia/sa1111_generic.c
0004  *
0005  * We implement the generic parts of a SA1111 PCMCIA driver.  This
0006  * basically means we handle everything except controlling the
0007  * power.  Power is machine specific...
0008  */
0009 #include <linux/module.h>
0010 #include <linux/kernel.h>
0011 #include <linux/ioport.h>
0012 #include <linux/device.h>
0013 #include <linux/interrupt.h>
0014 #include <linux/init.h>
0015 #include <linux/io.h>
0016 #include <linux/slab.h>
0017
0018 #include <pcmcia/ss.h>
0019
0020 #include <asm/hardware/sa1111.h>
0021 #include <asm/mach-types.h>
0022 #include <asm/irq.h>
0023
0024 #include "sa1111_generic.h"
0025
0026 /*
0027  * These are offsets from the above base.
0028  */
0029 #define PCCR    0x0000
0030 #define PCSSR   0x0004
0031 #define PCSR    0x0008
0032
0033 #define PCSR_S0_READY   (1<<0)
0034 #define PCSR_S1_READY   (1<<1)
0035 #define PCSR_S0_DETECT  (1<<2)
0036 #define PCSR_S1_DETECT  (1<<3)
0037 #define PCSR_S0_VS1 (1<<4)
0038 #define PCSR_S0_VS2 (1<<5)
0039 #define PCSR_S1_VS1 (1<<6)
0040 #define PCSR_S1_VS2 (1<<7)
0041 #define PCSR_S0_WP  (1<<8)
0042 #define PCSR_S1_WP  (1<<9)
0043 #define PCSR_S0_BVD1    (1<<10)
0044 #define PCSR_S0_BVD2    (1<<11)
0045 #define PCSR_S1_BVD1    (1<<12)
0046 #define PCSR_S1_BVD2    (1<<13)
0047
0048 #define PCCR_S0_RST (1<<0)
0049 #define PCCR_S1_RST (1<<1)
0050 #define PCCR_S0_FLT (1<<2)
0051 #define PCCR_S1_FLT (1<<3)
0052 #define PCCR_S0_PWAITEN (1<<4)
0053 #define PCCR_S1_PWAITEN (1<<5)
0054 #define PCCR_S0_PSE (1<<6)
0055 #define PCCR_S1_PSE (1<<7)
0056
0057 #define PCSSR_S0_SLEEP  (1<<0)
0058 #define PCSSR_S1_SLEEP  (1<<1)
0059
0060 #define IDX_IRQ_S0_READY_NINT   (0)
0061 #define IDX_IRQ_S0_CD_VALID (1)
0062 #define IDX_IRQ_S0_BVD1_STSCHG  (2)
0063 #define IDX_IRQ_S1_READY_NINT   (3)
0064 #define IDX_IRQ_S1_CD_VALID (4)
0065 #define IDX_IRQ_S1_BVD1_STSCHG  (5)
0066 #define NUM_IRQS        (6)
0067
0068 void sa1111_pcmcia_socket_state(struct soc_pcmcia_socket *skt, struct pcmcia_state *state)
0069 {
0070     struct sa1111_pcmcia_socket *s = to_skt(skt);
0071     u32 status = readl_relaxed(s->dev->mapbase + PCSR);
0072
0073     switch (skt->nr) {
0074     case 0:
0075         state->detect = status & PCSR_S0_DETECT ? 0 : 1;
0076         state->ready  = status & PCSR_S0_READY  ? 1 : 0;
0077         state->bvd1   = status & PCSR_S0_BVD1   ? 1 : 0;
0078         state->bvd2   = status & PCSR_S0_BVD2   ? 1 : 0;
0079         state->wrprot = status & PCSR_S0_WP     ? 1 : 0;
0080         state->vs_3v  = status & PCSR_S0_VS1    ? 0 : 1;
0081         state->vs_Xv  = status & PCSR_S0_VS2    ? 0 : 1;
0082         break;
0083
0084     case 1:
0085         state->detect = status & PCSR_S1_DETECT ? 0 : 1;
0086         state->ready  = status & PCSR_S1_READY  ? 1 : 0;
0087         state->bvd1   = status & PCSR_S1_BVD1   ? 1 : 0;
0088         state->bvd2   = status & PCSR_S1_BVD2   ? 1 : 0;
0089         state->wrprot = status & PCSR_S1_WP     ? 1 : 0;
0090         state->vs_3v  = status & PCSR_S1_VS1    ? 0 : 1;
0091         state->vs_Xv  = status & PCSR_S1_VS2    ? 0 : 1;
0092         break;
0093     }
0094 }
0095
0096 int sa1111_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state)
0097 {
0098     struct sa1111_pcmcia_socket *s = to_skt(skt);
0099     u32 pccr_skt_mask, pccr_set_mask, val;
0100     unsigned long flags;
0101
0102     switch (skt->nr) {
0103     case 0:
0104         pccr_skt_mask = PCCR_S0_RST|PCCR_S0_FLT|PCCR_S0_PWAITEN|PCCR_S0_PSE;
0105         break;
0106
0107     case 1:
0108         pccr_skt_mask = PCCR_S1_RST|PCCR_S1_FLT|PCCR_S1_PWAITEN|PCCR_S1_PSE;
0109         break;
0110
0111     default:
0112         return -1;
0113     }
0114
0115     pccr_set_mask = 0;
0116
0117     if (state->Vcc != 0)
0118         pccr_set_mask |= PCCR_S0_PWAITEN|PCCR_S1_PWAITEN;
0119     if (state->Vcc == 50)
0120         pccr_set_mask |= PCCR_S0_PSE|PCCR_S1_PSE;
0121     if (state->flags & SS_RESET)
0122         pccr_set_mask |= PCCR_S0_RST|PCCR_S1_RST;
0123     if (state->flags & SS_OUTPUT_ENA)
0124         pccr_set_mask |= PCCR_S0_FLT|PCCR_S1_FLT;
0125
0126     local_irq_save(flags);
0127     val = readl_relaxed(s->dev->mapbase + PCCR);
0128     val &= ~pccr_skt_mask;
0129     val |= pccr_set_mask & pccr_skt_mask;
0130     writel_relaxed(val, s->dev->mapbase + PCCR);
0131     local_irq_restore(flags);
0132
0133     return 0;
0134 }
0135
0136 int sa1111_pcmcia_add(struct sa1111_dev *dev, struct pcmcia_low_level *ops,
0137     int (*add)(struct soc_pcmcia_socket *))
0138 {
0139     struct sa1111_pcmcia_socket *s;
0140     struct clk *clk;
0141     int i, ret = 0, irqs[NUM_IRQS];
0142
0143     clk = devm_clk_get(&dev->dev, NULL);
0144     if (IS_ERR(clk))
0145         return PTR_ERR(clk);
0146
0147     for (i = 0; i < NUM_IRQS; i++) {
0148         irqs[i] = sa1111_get_irq(dev, i);
0149         if (irqs[i] <= 0)
0150             return irqs[i] ? : -ENXIO;
0151     }
0152
0153     ops->socket_state = sa1111_pcmcia_socket_state;
0154
0155     for (i = 0; i < ops->nr; i++) {
0156         s = kzalloc(sizeof(*s), GFP_KERNEL);
0157         if (!s)
0158             return -ENOMEM;
0159
0160         s->soc.nr = ops->first + i;
0161         s->soc.clk = clk;
0162
0163         soc_pcmcia_init_one(&s->soc, ops, &dev->dev);
0164         s->dev = dev;
0165         if (s->soc.nr) {
0166             s->soc.socket.pci_irq = irqs[IDX_IRQ_S1_READY_NINT];
0167             s->soc.stat[SOC_STAT_CD].irq = irqs[IDX_IRQ_S1_CD_VALID];
0168             s->soc.stat[SOC_STAT_CD].name = "SA1111 CF card detect";
0169             s->soc.stat[SOC_STAT_BVD1].irq = irqs[IDX_IRQ_S1_BVD1_STSCHG];
0170             s->soc.stat[SOC_STAT_BVD1].name = "SA1111 CF BVD1";
0171         } else {
0172             s->soc.socket.pci_irq = irqs[IDX_IRQ_S0_READY_NINT];
0173             s->soc.stat[SOC_STAT_CD].irq = irqs[IDX_IRQ_S0_CD_VALID];
0174             s->soc.stat[SOC_STAT_CD].name = "SA1111 PCMCIA card detect";
0175             s->soc.stat[SOC_STAT_BVD1].irq = irqs[IDX_IRQ_S0_BVD1_STSCHG];
0176             s->soc.stat[SOC_STAT_BVD1].name = "SA1111 PCMCIA BVD1";
0177         }
0178
0179         ret = add(&s->soc);
0180         if (ret == 0) {
0181             s->next = dev_get_drvdata(&dev->dev);
0182             dev_set_drvdata(&dev->dev, s);
0183         } else
0184             kfree(s);
0185     }
0186
0187     return ret;
0188 }
0189
0190 static int pcmcia_probe(struct sa1111_dev *dev)
0191 {
0192     void __iomem *base;
0193     int ret;
0194
0195     ret = sa1111_enable_device(dev);
0196     if (ret)
0197         return ret;
0198
0199     dev_set_drvdata(&dev->dev, NULL);
0200
0201     if (!request_mem_region(dev->res.start, 512, SA1111_DRIVER_NAME(dev))) {
0202         sa1111_disable_device(dev);
0203         return -EBUSY;
0204     }
0205
0206     base = dev->mapbase;
0207
0208     /*
0209      * Initialise the suspend state.
0210      */
0211     writel_relaxed(PCSSR_S0_SLEEP | PCSSR_S1_SLEEP, base + PCSSR);
0212     writel_relaxed(PCCR_S0_FLT | PCCR_S1_FLT, base + PCCR);
0213
0214     ret = -ENODEV;
0215 #ifdef CONFIG_SA1100_BADGE4
0216     if (machine_is_badge4())
0217         ret = pcmcia_badge4_init(dev);
0218 #endif
0219 #ifdef CONFIG_SA1100_JORNADA720
0220     if (machine_is_jornada720())
0221         ret = pcmcia_jornada720_init(dev);
0222 #endif
0223 #ifdef CONFIG_ARCH_LUBBOCK
0224     if (machine_is_lubbock())
0225         ret = pcmcia_lubbock_init(dev);
0226 #endif
0227 #ifdef CONFIG_ASSABET_NEPONSET
0228     if (machine_is_assabet())
0229         ret = pcmcia_neponset_init(dev);
0230 #endif
0231
0232     if (ret) {
0233         release_mem_region(dev->res.start, 512);
0234         sa1111_disable_device(dev);
0235     }
0236
0237     return ret;
0238 }
0239
0240 static void pcmcia_remove(struct sa1111_dev *dev)
0241 {
0242     struct sa1111_pcmcia_socket *next, *s = dev_get_drvdata(&dev->dev);
0243
0244     dev_set_drvdata(&dev->dev, NULL);
0245
0246     for (; s; s = next) {
0247         next = s->next;
0248         soc_pcmcia_remove_one(&s->soc);
0249         kfree(s);
0250     }
0251
0252     release_mem_region(dev->res.start, 512);
0253     sa1111_disable_device(dev);
0254 }
0255
0256 static struct sa1111_driver pcmcia_driver = {
0257     .drv = {
0258         .name   = "sa1111-pcmcia",
0259     },
0260     .devid      = SA1111_DEVID_PCMCIA,
0261     .probe      = pcmcia_probe,
0262     .remove     = pcmcia_remove,
0263 };
0264
0265 static int __init sa1111_drv_pcmcia_init(void)
0266 {
0267     return sa1111_driver_register(&pcmcia_driver);
0268 }
0269
0270 static void __exit sa1111_drv_pcmcia_exit(void)
0271 {
0272     sa1111_driver_unregister(&pcmcia_driver);
0273 }
0274
0275 fs_initcall(sa1111_drv_pcmcia_init);
0276 module_exit(sa1111_drv_pcmcia_exit);
0277
0278 MODULE_DESCRIPTION("SA1111 PCMCIA card socket driver");
0279 MODULE_LICENSE("GPL");