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