diff options
Diffstat (limited to '')
-rw-r--r-- | drivers/pcmcia/sa1111_jornada720.c | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/drivers/pcmcia/sa1111_jornada720.c b/drivers/pcmcia/sa1111_jornada720.c new file mode 100644 index 000000000..1083e1b4f --- /dev/null +++ b/drivers/pcmcia/sa1111_jornada720.c @@ -0,0 +1,138 @@ +// 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); +} |