1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * linux/drivers/pcmcia/sa1100_neponset.c 4 * 5 * Neponset PCMCIA specific routines 6 */ 7 #include <linux/module.h> 8 #include <linux/kernel.h> 9 #include <linux/device.h> 10 #include <linux/errno.h> 11 #include <linux/init.h> 12 13 #include <mach/hardware.h> 14 #include <asm/mach-types.h> 15 #include <mach/neponset.h> 16 #include <asm/hardware/sa1111.h> 17 18 #include "sa1111_generic.h" 19 20 /* 21 * Neponset uses the Maxim MAX1600, with the following connections: 22 * 23 * MAX1600 Neponset 24 * 25 * A0VCC SA-1111 GPIO A<1> 26 * A1VCC SA-1111 GPIO A<0> 27 * A0VPP CPLD NCR A0VPP 28 * A1VPP CPLD NCR A1VPP 29 * B0VCC SA-1111 GPIO A<2> 30 * B1VCC SA-1111 GPIO A<3> 31 * B0VPP ground (slot B is CF) 32 * B1VPP ground (slot B is CF) 33 * 34 * VX VCC (5V) 35 * VY VCC3_3 (3.3V) 36 * 12INA 12V 37 * 12INB ground (slot B is CF) 38 * 39 * The MAX1600 CODE pin is tied to ground, placing the device in 40 * "Standard Intel code" mode. Refer to the Maxim data sheet for 41 * the corresponding truth table. 42 */ 43 44 static int 45 neponset_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state) 46 { 47 struct sa1111_pcmcia_socket *s = to_skt(skt); 48 unsigned int ncr_mask, ncr_set, pa_dwr_mask, pa_dwr_set; 49 int ret; 50 51 switch (skt->nr) { 52 case 0: 53 pa_dwr_mask = GPIO_A0 | GPIO_A1; 54 ncr_mask = NCR_A0VPP | NCR_A1VPP; 55 56 if (state->Vpp == 0) 57 ncr_set = 0; 58 else if (state->Vpp == 120) 59 ncr_set = NCR_A1VPP; 60 else if (state->Vpp == state->Vcc) 61 ncr_set = NCR_A0VPP; 62 else { 63 printk(KERN_ERR "%s(): unrecognized VPP %u\n", 64 __func__, state->Vpp); 65 return -1; 66 } 67 break; 68 69 case 1: 70 pa_dwr_mask = GPIO_A2 | GPIO_A3; 71 ncr_mask = 0; 72 ncr_set = 0; 73 74 if (state->Vpp != state->Vcc && state->Vpp != 0) { 75 printk(KERN_ERR "%s(): CF slot cannot support VPP %u\n", 76 __func__, state->Vpp); 77 return -1; 78 } 79 break; 80 81 default: 82 return -1; 83 } 84 85 /* 86 * pa_dwr_set is the mask for selecting Vcc on both sockets. 87 * pa_dwr_mask selects which bits (and therefore socket) we change. 88 */ 89 switch (state->Vcc) { 90 default: 91 case 0: pa_dwr_set = 0; break; 92 case 33: pa_dwr_set = GPIO_A1|GPIO_A2; break; 93 case 50: pa_dwr_set = GPIO_A0|GPIO_A3; break; 94 } 95 96 ret = sa1111_pcmcia_configure_socket(skt, state); 97 if (ret == 0) { 98 neponset_ncr_frob(ncr_mask, ncr_set); 99 sa1111_set_io(s->dev, pa_dwr_mask, pa_dwr_set); 100 } 101 102 return ret; 103 } 104 105 static struct pcmcia_low_level neponset_pcmcia_ops = { 106 .owner = THIS_MODULE, 107 .configure_socket = neponset_pcmcia_configure_socket, 108 .first = 0, 109 .nr = 2, 110 }; 111 112 int pcmcia_neponset_init(struct sa1111_dev *sadev) 113 { 114 /* 115 * Set GPIO_A<3:0> to be outputs for the MAX1600, 116 * and switch to standby mode. 117 */ 118 sa1111_set_io_dir(sadev, GPIO_A0|GPIO_A1|GPIO_A2|GPIO_A3, 0, 0); 119 sa1111_set_io(sadev, GPIO_A0|GPIO_A1|GPIO_A2|GPIO_A3, 0); 120 sa1111_set_sleep_io(sadev, GPIO_A0|GPIO_A1|GPIO_A2|GPIO_A3, 0); 121 sa11xx_drv_pcmcia_ops(&neponset_pcmcia_ops); 122 return sa1111_pcmcia_add(sadev, &neponset_pcmcia_ops, 123 sa11xx_drv_pcmcia_add_one); 124 } 125