139 строки
3.0 KiB
C
139 строки
3.0 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* drivers/pcmcia/sa1100_jornada720.c
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*
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* Jornada720 PCMCIA specific routines
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*
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*/
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#include <linux/module.h>
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#include <linux/device.h>
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#include <linux/errno.h>
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#include <linux/gpio/consumer.h>
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#include <linux/init.h>
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#include <linux/io.h>
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#include <mach/hardware.h>
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#include <asm/mach-types.h>
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#include "sa1111_generic.h"
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/*
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* Socket 0 power: GPIO A0
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* Socket 0 3V: GPIO A2
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* Socket 1 power: GPIO A1 & GPIO A3
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* Socket 1 3V: GPIO A3
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* Does Socket 1 3V actually do anything?
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*/
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enum {
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J720_GPIO_PWR,
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J720_GPIO_3V,
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J720_GPIO_MAX,
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};
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struct jornada720_data {
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struct gpio_desc *gpio[J720_GPIO_MAX];
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};
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static int jornada720_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
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{
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struct device *dev = skt->socket.dev.parent;
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struct jornada720_data *j;
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j = devm_kzalloc(dev, sizeof(*j), GFP_KERNEL);
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if (!j)
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return -ENOMEM;
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j->gpio[J720_GPIO_PWR] = devm_gpiod_get(dev, skt->nr ? "s1-power" :
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"s0-power", GPIOD_OUT_LOW);
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if (IS_ERR(j->gpio[J720_GPIO_PWR]))
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return PTR_ERR(j->gpio[J720_GPIO_PWR]);
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j->gpio[J720_GPIO_3V] = devm_gpiod_get(dev, skt->nr ? "s1-3v" :
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"s0-3v", GPIOD_OUT_LOW);
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if (IS_ERR(j->gpio[J720_GPIO_3V]))
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return PTR_ERR(j->gpio[J720_GPIO_3V]);
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skt->driver_data = j;
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return 0;
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}
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static int
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jornada720_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state)
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{
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struct jornada720_data *j = skt->driver_data;
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DECLARE_BITMAP(values, J720_GPIO_MAX) = { 0, };
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int ret;
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printk(KERN_INFO "%s(): config socket %d vcc %d vpp %d\n", __func__,
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skt->nr, state->Vcc, state->Vpp);
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switch (skt->nr) {
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case 0:
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switch (state->Vcc) {
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default:
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case 0:
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__assign_bit(J720_GPIO_PWR, values, 0);
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__assign_bit(J720_GPIO_3V, values, 0);
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break;
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case 33:
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__assign_bit(J720_GPIO_PWR, values, 1);
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__assign_bit(J720_GPIO_3V, values, 1);
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break;
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case 50:
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__assign_bit(J720_GPIO_PWR, values, 1);
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__assign_bit(J720_GPIO_3V, values, 0);
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break;
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}
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break;
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case 1:
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switch (state->Vcc) {
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default:
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case 0:
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__assign_bit(J720_GPIO_PWR, values, 0);
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__assign_bit(J720_GPIO_3V, values, 0);
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break;
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case 33:
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case 50:
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__assign_bit(J720_GPIO_PWR, values, 1);
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__assign_bit(J720_GPIO_3V, values, 1);
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break;
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}
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break;
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default:
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return -1;
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}
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if (state->Vpp != state->Vcc && state->Vpp != 0) {
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printk(KERN_ERR "%s(): slot cannot support VPP %u\n",
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__func__, state->Vpp);
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return -EPERM;
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}
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ret = sa1111_pcmcia_configure_socket(skt, state);
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if (ret == 0)
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ret = gpiod_set_array_value_cansleep(J720_GPIO_MAX, j->gpio,
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NULL, values);
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return ret;
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}
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static struct pcmcia_low_level jornada720_pcmcia_ops = {
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.owner = THIS_MODULE,
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.hw_init = jornada720_pcmcia_hw_init,
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.configure_socket = jornada720_pcmcia_configure_socket,
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.first = 0,
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.nr = 2,
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};
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int pcmcia_jornada720_init(struct sa1111_dev *sadev)
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{
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/* Fixme: why messing around with SA11x0's GPIO1? */
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GRER |= 0x00000002;
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sa11xx_drv_pcmcia_ops(&jornada720_pcmcia_ops);
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return sa1111_pcmcia_add(sadev, &jornada720_pcmcia_ops,
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sa11xx_drv_pcmcia_add_one);
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}
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