mirror of
https://github.com/torvalds/linux.git
synced 2024-12-05 10:32:35 +00:00
d2912cb15b
Based on 2 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation # extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 4122 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Enrico Weigelt <info@metux.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
157 lines
3.4 KiB
C
157 lines
3.4 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* linux/drivers/pcmcia/pxa2xx_lubbock.c
|
|
*
|
|
* Author: George Davis
|
|
* Created: Jan 10, 2002
|
|
* Copyright: MontaVista Software Inc.
|
|
*
|
|
* Originally based upon linux/drivers/pcmcia/sa1100_neponset.c
|
|
*
|
|
* Lubbock PCMCIA specific routines.
|
|
*/
|
|
#include <linux/module.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/device.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/init.h>
|
|
#include <linux/delay.h>
|
|
|
|
#include <mach/hardware.h>
|
|
#include <asm/hardware/sa1111.h>
|
|
#include <asm/mach-types.h>
|
|
|
|
#include "sa1111_generic.h"
|
|
#include "max1600.h"
|
|
|
|
static int lubbock_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
|
|
{
|
|
struct max1600 *m;
|
|
int ret;
|
|
|
|
ret = max1600_init(skt->socket.dev.parent, &m,
|
|
skt->nr ? MAX1600_CHAN_B : MAX1600_CHAN_A,
|
|
MAX1600_CODE_HIGH);
|
|
if (ret == 0)
|
|
skt->driver_data = m;
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int
|
|
lubbock_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
|
|
const socket_state_t *state)
|
|
{
|
|
struct max1600 *m = skt->driver_data;
|
|
int ret = 0;
|
|
|
|
/* Lubbock uses the Maxim MAX1602, with the following connections:
|
|
*
|
|
* Socket 0 (PCMCIA):
|
|
* MAX1602 Lubbock Register
|
|
* Pin Signal
|
|
* ----- ------- ----------------------
|
|
* A0VPP S0_PWR0 SA-1111 GPIO A<0>
|
|
* A1VPP S0_PWR1 SA-1111 GPIO A<1>
|
|
* A0VCC S0_PWR2 SA-1111 GPIO A<2>
|
|
* A1VCC S0_PWR3 SA-1111 GPIO A<3>
|
|
* VX VCC
|
|
* VY +3.3V
|
|
* 12IN +12V
|
|
* CODE +3.3V Cirrus Code, CODE = High (VY)
|
|
*
|
|
* Socket 1 (CF):
|
|
* MAX1602 Lubbock Register
|
|
* Pin Signal
|
|
* ----- ------- ----------------------
|
|
* A0VPP GND VPP is not connected
|
|
* A1VPP GND VPP is not connected
|
|
* A0VCC S1_PWR0 MISC_WR<14>
|
|
* A1VCC S1_PWR1 MISC_WR<15>
|
|
* VX VCC
|
|
* VY +3.3V
|
|
* 12IN GND VPP is not connected
|
|
* CODE +3.3V Cirrus Code, CODE = High (VY)
|
|
*
|
|
*/
|
|
|
|
again:
|
|
switch (skt->nr) {
|
|
case 0:
|
|
case 1:
|
|
break;
|
|
|
|
default:
|
|
ret = -1;
|
|
}
|
|
|
|
if (ret == 0)
|
|
ret = sa1111_pcmcia_configure_socket(skt, state);
|
|
if (ret == 0)
|
|
ret = max1600_configure(m, state->Vcc, state->Vpp);
|
|
|
|
#if 1
|
|
if (ret == 0 && state->Vcc == 33) {
|
|
struct pcmcia_state new_state;
|
|
|
|
/*
|
|
* HACK ALERT:
|
|
* We can't sense the voltage properly on Lubbock before
|
|
* actually applying some power to the socket (catch 22).
|
|
* Resense the socket Voltage Sense pins after applying
|
|
* socket power.
|
|
*
|
|
* Note: It takes about 2.5ms for the MAX1602 VCC output
|
|
* to rise.
|
|
*/
|
|
mdelay(3);
|
|
|
|
sa1111_pcmcia_socket_state(skt, &new_state);
|
|
|
|
if (!new_state.vs_3v && !new_state.vs_Xv) {
|
|
/*
|
|
* Switch to 5V, Configure socket with 5V voltage
|
|
*/
|
|
max1600_configure(m, 0, 0);
|
|
|
|
/*
|
|
* It takes about 100ms to turn off Vcc.
|
|
*/
|
|
mdelay(100);
|
|
|
|
/*
|
|
* We need to hack around the const qualifier as
|
|
* well to keep this ugly workaround localized and
|
|
* not force it to the rest of the code. Barf bags
|
|
* available in the seat pocket in front of you!
|
|
*/
|
|
((socket_state_t *)state)->Vcc = 50;
|
|
((socket_state_t *)state)->Vpp = 50;
|
|
goto again;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
return ret;
|
|
}
|
|
|
|
static struct pcmcia_low_level lubbock_pcmcia_ops = {
|
|
.owner = THIS_MODULE,
|
|
.hw_init = lubbock_pcmcia_hw_init,
|
|
.configure_socket = lubbock_pcmcia_configure_socket,
|
|
.first = 0,
|
|
.nr = 2,
|
|
};
|
|
|
|
#include "pxa2xx_base.h"
|
|
|
|
int pcmcia_lubbock_init(struct sa1111_dev *sadev)
|
|
{
|
|
pxa2xx_drv_pcmcia_ops(&lubbock_pcmcia_ops);
|
|
pxa2xx_configure_sockets(&sadev->dev, &lubbock_pcmcia_ops);
|
|
return sa1111_pcmcia_add(sadev, &lubbock_pcmcia_ops,
|
|
pxa2xx_drv_pcmcia_add_one);
|
|
}
|
|
|
|
MODULE_LICENSE("GPL");
|