156 строки
3.4 KiB
C
156 строки
3.4 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* linux/drivers/pcmcia/pxa2xx_lubbock.c
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*
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* Author: George Davis
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* Created: Jan 10, 2002
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* Copyright: MontaVista Software Inc.
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*
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* Originally based upon linux/drivers/pcmcia/sa1100_neponset.c
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*
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* Lubbock PCMCIA specific routines.
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/device.h>
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#include <linux/errno.h>
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#include <linux/init.h>
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#include <linux/delay.h>
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#include <asm/hardware/sa1111.h>
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#include <asm/mach-types.h>
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#include "sa1111_generic.h"
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#include "max1600.h"
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static int lubbock_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
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{
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struct max1600 *m;
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int ret;
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ret = max1600_init(skt->socket.dev.parent, &m,
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skt->nr ? MAX1600_CHAN_B : MAX1600_CHAN_A,
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MAX1600_CODE_HIGH);
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if (ret == 0)
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skt->driver_data = m;
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return ret;
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}
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static int
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lubbock_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
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const socket_state_t *state)
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{
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struct max1600 *m = skt->driver_data;
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int ret = 0;
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/* Lubbock uses the Maxim MAX1602, with the following connections:
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*
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* Socket 0 (PCMCIA):
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* MAX1602 Lubbock Register
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* Pin Signal
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* ----- ------- ----------------------
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* A0VPP S0_PWR0 SA-1111 GPIO A<0>
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* A1VPP S0_PWR1 SA-1111 GPIO A<1>
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* A0VCC S0_PWR2 SA-1111 GPIO A<2>
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* A1VCC S0_PWR3 SA-1111 GPIO A<3>
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* VX VCC
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* VY +3.3V
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* 12IN +12V
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* CODE +3.3V Cirrus Code, CODE = High (VY)
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*
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* Socket 1 (CF):
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* MAX1602 Lubbock Register
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* Pin Signal
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* ----- ------- ----------------------
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* A0VPP GND VPP is not connected
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* A1VPP GND VPP is not connected
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* A0VCC S1_PWR0 MISC_WR<14>
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* A1VCC S1_PWR1 MISC_WR<15>
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* VX VCC
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* VY +3.3V
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* 12IN GND VPP is not connected
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* CODE +3.3V Cirrus Code, CODE = High (VY)
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*
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*/
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again:
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switch (skt->nr) {
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case 0:
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case 1:
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break;
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default:
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ret = -1;
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}
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if (ret == 0)
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ret = sa1111_pcmcia_configure_socket(skt, state);
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if (ret == 0)
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ret = max1600_configure(m, state->Vcc, state->Vpp);
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#if 1
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if (ret == 0 && state->Vcc == 33) {
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struct pcmcia_state new_state;
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/*
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* HACK ALERT:
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* We can't sense the voltage properly on Lubbock before
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* actually applying some power to the socket (catch 22).
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* Resense the socket Voltage Sense pins after applying
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* socket power.
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*
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* Note: It takes about 2.5ms for the MAX1602 VCC output
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* to rise.
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*/
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mdelay(3);
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sa1111_pcmcia_socket_state(skt, &new_state);
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if (!new_state.vs_3v && !new_state.vs_Xv) {
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/*
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* Switch to 5V, Configure socket with 5V voltage
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*/
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max1600_configure(m, 0, 0);
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/*
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* It takes about 100ms to turn off Vcc.
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*/
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mdelay(100);
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/*
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* We need to hack around the const qualifier as
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* well to keep this ugly workaround localized and
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* not force it to the rest of the code. Barf bags
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* available in the seat pocket in front of you!
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*/
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((socket_state_t *)state)->Vcc = 50;
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((socket_state_t *)state)->Vpp = 50;
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goto again;
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}
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}
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#endif
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return ret;
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}
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static struct pcmcia_low_level lubbock_pcmcia_ops = {
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.owner = THIS_MODULE,
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.hw_init = lubbock_pcmcia_hw_init,
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.configure_socket = lubbock_pcmcia_configure_socket,
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.first = 0,
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.nr = 2,
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};
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#include "pxa2xx_base.h"
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int pcmcia_lubbock_init(struct sa1111_dev *sadev)
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{
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pxa2xx_drv_pcmcia_ops(&lubbock_pcmcia_ops);
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pxa2xx_configure_sockets(&sadev->dev, &lubbock_pcmcia_ops);
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return sa1111_pcmcia_add(sadev, &lubbock_pcmcia_ops,
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pxa2xx_drv_pcmcia_add_one);
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}
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MODULE_LICENSE("GPL");
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