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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * linux/drivers/pcmcia/sa1111_generic.c4 *5 * We implement the generic parts of a SA1111 PCMCIA driver. This6 * basically means we handle everything except controlling the7 * 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 0x000030#define PCSSR 0x000431#define PCSR 0x000832 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 68void 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 96int 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 136int 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 } else184 kfree(s);185 }186 187 return ret;188}189 190static 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_JORNADA720216 if (machine_is_jornada720())217 ret = pcmcia_jornada720_init(dev);218#endif219#ifdef CONFIG_ASSABET_NEPONSET220 if (machine_is_assabet())221 ret = pcmcia_neponset_init(dev);222#endif223 224 if (ret) {225 release_mem_region(dev->res.start, 512);226 sa1111_disable_device(dev);227 }228 229 return ret;230}231 232static 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 248static 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 257static int __init sa1111_drv_pcmcia_init(void)258{259 return sa1111_driver_register(&pcmcia_driver);260}261 262static void __exit sa1111_drv_pcmcia_exit(void)263{264 sa1111_driver_unregister(&pcmcia_driver);265}266 267fs_initcall(sa1111_drv_pcmcia_init);268module_exit(sa1111_drv_pcmcia_exit);269 270MODULE_DESCRIPTION("SA1111 PCMCIA card socket driver");271MODULE_LICENSE("GPL");272