/* * linux/drivers/pcmcia/sa1100_neponset.c * * Neponset PCMCIA specific routines */ #include <linux/module.h> #include <linux/kernel.h> #include <linux/device.h> #include <linux/errno.h> #include <linux/init.h> #include <mach/hardware.h> #include <asm/mach-types.h> #include <mach/neponset.h> #include <asm/hardware/sa1111.h> #include "sa1111_generic.h" /* * Neponset uses the Maxim MAX1600, with the following connections: * * MAX1600 Neponset * * A0VCC SA-1111 GPIO A<1> * A1VCC SA-1111 GPIO A<0> * A0VPP CPLD NCR A0VPP * A1VPP CPLD NCR A1VPP * B0VCC SA-1111 GPIO A<2> * B1VCC SA-1111 GPIO A<3> * B0VPP ground (slot B is CF) * B1VPP ground (slot B is CF) * * VX VCC (5V) * VY VCC3_3 (3.3V) * 12INA 12V * 12INB ground (slot B is CF) * * The MAX1600 CODE pin is tied to ground, placing the device in * "Standard Intel code" mode. Refer to the Maxim data sheet for * the corresponding truth table. */ static int neponset_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state) { struct sa1111_pcmcia_socket *s = to_skt(skt); unsigned int ncr_mask, ncr_set, pa_dwr_mask, pa_dwr_set; int ret; switch (skt->nr) { case 0: pa_dwr_mask = GPIO_A0 | GPIO_A1; ncr_mask = NCR_A0VPP | NCR_A1VPP; if (state->Vpp == 0) ncr_set = 0; else if (state->Vpp == 120) ncr_set = NCR_A1VPP; else if (state->Vpp == state->Vcc) ncr_set = NCR_A0VPP; else { printk(KERN_ERR "%s(): unrecognized VPP %u\n", __func__, state->Vpp); return -1; } break; case 1: pa_dwr_mask = GPIO_A2 | GPIO_A3; ncr_mask = 0; ncr_set = 0; if (state->Vpp != state->Vcc && state->Vpp != 0) { printk(KERN_ERR "%s(): CF slot cannot support VPP %u\n", __func__, state->Vpp); return -1; } break; default: return -1; } /* * pa_dwr_set is the mask for selecting Vcc on both sockets. * pa_dwr_mask selects which bits (and therefore socket) we change. */ switch (state->Vcc) { default: case 0: pa_dwr_set = 0; break; case 33: pa_dwr_set = GPIO_A1|GPIO_A2; break; case 50: pa_dwr_set = GPIO_A0|GPIO_A3; break; } ret = sa1111_pcmcia_configure_socket(skt, state); if (ret == 0) { neponset_ncr_frob(ncr_mask, ncr_set); sa1111_set_io(s->dev, pa_dwr_mask, pa_dwr_set); } return ret; } static struct pcmcia_low_level neponset_pcmcia_ops = { .owner = THIS_MODULE, .configure_socket = neponset_pcmcia_configure_socket, .first = 0, .nr = 2, }; int pcmcia_neponset_init(struct sa1111_dev *sadev) { int ret = -ENODEV; if (machine_is_assabet()) { /* * Set GPIO_A<3:0> to be outputs for the MAX1600, * and switch to standby mode. */ sa1111_set_io_dir(sadev, GPIO_A0|GPIO_A1|GPIO_A2|GPIO_A3, 0, 0); sa1111_set_io(sadev, GPIO_A0|GPIO_A1|GPIO_A2|GPIO_A3, 0); sa1111_set_sleep_io(sadev, GPIO_A0|GPIO_A1|GPIO_A2|GPIO_A3, 0); sa11xx_drv_pcmcia_ops(&neponset_pcmcia_ops); ret = sa1111_pcmcia_add(sadev, &neponset_pcmcia_ops, sa11xx_drv_pcmcia_add_one); } return ret; }