cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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sa1111_neponset.c (1997B)

      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 <asm/mach-types.h>
     14
     15#include "sa1111_generic.h"
     16#include "max1600.h"
     17
     18/*
     19 * Neponset uses the Maxim MAX1600, with the following connections:
     20 *
     21 *   MAX1600      Neponset
     22 *
     23 *    A0VCC        SA-1111 GPIO A<1>
     24 *    A1VCC        SA-1111 GPIO A<0>
     25 *    A0VPP        CPLD NCR A0VPP
     26 *    A1VPP        CPLD NCR A1VPP
     27 *    B0VCC        SA-1111 GPIO A<2>
     28 *    B1VCC        SA-1111 GPIO A<3>
     29 *    B0VPP        ground (slot B is CF)
     30 *    B1VPP        ground (slot B is CF)
     31 *
     32 *     VX          VCC (5V)
     33 *     VY          VCC3_3 (3.3V)
     34 *     12INA       12V
     35 *     12INB       ground (slot B is CF)
     36 *
     37 * The MAX1600 CODE pin is tied to ground, placing the device in 
     38 * "Standard Intel code" mode. Refer to the Maxim data sheet for
     39 * the corresponding truth table.
     40 */
     41static int neponset_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
     42{
     43	struct max1600 *m;
     44	int ret;
     45
     46	ret = max1600_init(skt->socket.dev.parent, &m,
     47			   skt->nr ? MAX1600_CHAN_B : MAX1600_CHAN_A,
     48			   MAX1600_CODE_LOW);
     49	if (ret == 0)
     50		skt->driver_data = m;
     51
     52	return ret;
     53}
     54
     55static int
     56neponset_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state)
     57{
     58	struct max1600 *m = skt->driver_data;
     59	int ret;
     60
     61	ret = sa1111_pcmcia_configure_socket(skt, state);
     62	if (ret == 0)
     63		ret = max1600_configure(m, state->Vcc, state->Vpp);
     64
     65	return ret;
     66}
     67
     68static struct pcmcia_low_level neponset_pcmcia_ops = {
     69	.owner			= THIS_MODULE,
     70	.hw_init		= neponset_pcmcia_hw_init,
     71	.configure_socket	= neponset_pcmcia_configure_socket,
     72	.first			= 0,
     73	.nr			= 2,
     74};
     75
     76int pcmcia_neponset_init(struct sa1111_dev *sadev)
     77{
     78	sa11xx_drv_pcmcia_ops(&neponset_pcmcia_ops);
     79	return sa1111_pcmcia_add(sadev, &neponset_pcmcia_ops,
     80				 sa11xx_drv_pcmcia_add_one);
     81}