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1// SPDX-License-Identifier: GPL-2.02/*3 * drivers/pcmcia/sa1100_jornada720.c4 *5 * Jornada720 PCMCIA specific routines6 *7 */8#include <linux/module.h>9#include <linux/device.h>10#include <linux/errno.h>11#include <linux/gpio/consumer.h>12#include <linux/init.h>13#include <linux/io.h>14 15#include <mach/hardware.h>16#include <asm/mach-types.h>17 18#include "sa1111_generic.h"19 20/*21 * Socket 0 power: GPIO A022 * Socket 0 3V: GPIO A223 * Socket 1 power: GPIO A1 & GPIO A324 * Socket 1 3V: GPIO A325 * Does Socket 1 3V actually do anything?26 */27enum {28 J720_GPIO_PWR,29 J720_GPIO_3V,30 J720_GPIO_MAX,31};32struct jornada720_data {33 struct gpio_desc *gpio[J720_GPIO_MAX];34};35 36static int jornada720_pcmcia_hw_init(struct soc_pcmcia_socket *skt)37{38 struct device *dev = skt->socket.dev.parent;39 struct jornada720_data *j;40 41 j = devm_kzalloc(dev, sizeof(*j), GFP_KERNEL);42 if (!j)43 return -ENOMEM;44 45 j->gpio[J720_GPIO_PWR] = devm_gpiod_get(dev, skt->nr ? "s1-power" :46 "s0-power", GPIOD_OUT_LOW);47 if (IS_ERR(j->gpio[J720_GPIO_PWR]))48 return PTR_ERR(j->gpio[J720_GPIO_PWR]);49 50 j->gpio[J720_GPIO_3V] = devm_gpiod_get(dev, skt->nr ? "s1-3v" :51 "s0-3v", GPIOD_OUT_LOW);52 if (IS_ERR(j->gpio[J720_GPIO_3V]))53 return PTR_ERR(j->gpio[J720_GPIO_3V]);54 55 skt->driver_data = j;56 57 return 0;58}59 60static int61jornada720_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state)62{63 struct jornada720_data *j = skt->driver_data;64 DECLARE_BITMAP(values, J720_GPIO_MAX) = { 0, };65 int ret;66 67 printk(KERN_INFO "%s(): config socket %d vcc %d vpp %d\n", __func__,68 skt->nr, state->Vcc, state->Vpp);69 70 switch (skt->nr) {71 case 0:72 switch (state->Vcc) {73 default:74 case 0:75 __assign_bit(J720_GPIO_PWR, values, 0);76 __assign_bit(J720_GPIO_3V, values, 0);77 break;78 case 33:79 __assign_bit(J720_GPIO_PWR, values, 1);80 __assign_bit(J720_GPIO_3V, values, 1);81 break;82 case 50:83 __assign_bit(J720_GPIO_PWR, values, 1);84 __assign_bit(J720_GPIO_3V, values, 0);85 break;86 }87 break;88 89 case 1:90 switch (state->Vcc) {91 default:92 case 0:93 __assign_bit(J720_GPIO_PWR, values, 0);94 __assign_bit(J720_GPIO_3V, values, 0);95 break;96 case 33:97 case 50:98 __assign_bit(J720_GPIO_PWR, values, 1);99 __assign_bit(J720_GPIO_3V, values, 1);100 break;101 }102 break;103 104 default:105 return -1;106 }107 108 if (state->Vpp != state->Vcc && state->Vpp != 0) {109 printk(KERN_ERR "%s(): slot cannot support VPP %u\n",110 __func__, state->Vpp);111 return -EPERM;112 }113 114 ret = sa1111_pcmcia_configure_socket(skt, state);115 if (ret == 0)116 ret = gpiod_set_array_value_cansleep(J720_GPIO_MAX, j->gpio,117 NULL, values);118 119 return ret;120}121 122static struct pcmcia_low_level jornada720_pcmcia_ops = {123 .owner = THIS_MODULE,124 .hw_init = jornada720_pcmcia_hw_init,125 .configure_socket = jornada720_pcmcia_configure_socket,126 .first = 0,127 .nr = 2,128};129 130int pcmcia_jornada720_init(struct sa1111_dev *sadev)131{132 /* Fixme: why messing around with SA11x0's GPIO1? */133 GRER |= 0x00000002;134 135 sa11xx_drv_pcmcia_ops(&jornada720_pcmcia_ops);136 return sa1111_pcmcia_add(sadev, &jornada720_pcmcia_ops,137 sa11xx_drv_pcmcia_add_one);138}139