230 lines
5 KiB
C
230 lines
5 KiB
C
/*
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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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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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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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*/
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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 <mach/hardware.h>
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#include <asm/hardware/sa1111.h>
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#include <asm/mach-types.h>
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#include <mach/lubbock.h>
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#include "sa1111_generic.h"
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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 sa1111_pcmcia_socket *s = to_skt(skt);
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unsigned int pa_dwr_mask, pa_dwr_set, misc_mask, misc_set;
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int ret = 0;
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pa_dwr_mask = pa_dwr_set = misc_mask = misc_set = 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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pa_dwr_mask = GPIO_A0 | GPIO_A1 | GPIO_A2 | GPIO_A3;
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switch (state->Vcc) {
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case 0: /* Hi-Z */
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break;
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case 33: /* VY */
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pa_dwr_set |= GPIO_A3;
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break;
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case 50: /* VX */
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pa_dwr_set |= GPIO_A2;
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break;
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default:
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printk(KERN_ERR "%s(): unrecognized Vcc %u\n",
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__func__, state->Vcc);
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ret = -1;
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}
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switch (state->Vpp) {
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case 0: /* Hi-Z */
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break;
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case 120: /* 12IN */
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pa_dwr_set |= GPIO_A1;
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break;
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default: /* VCC */
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if (state->Vpp == state->Vcc)
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pa_dwr_set |= GPIO_A0;
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else {
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printk(KERN_ERR "%s(): unrecognized Vpp %u\n",
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__func__, state->Vpp);
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ret = -1;
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break;
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}
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}
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break;
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case 1:
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misc_mask = (1 << 15) | (1 << 14);
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switch (state->Vcc) {
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case 0: /* Hi-Z */
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break;
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case 33: /* VY */
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misc_set |= 1 << 15;
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break;
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case 50: /* VX */
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misc_set |= 1 << 14;
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break;
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default:
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printk(KERN_ERR "%s(): unrecognized Vcc %u\n",
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__func__, state->Vcc);
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ret = -1;
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break;
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}
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if (state->Vpp != state->Vcc && state->Vpp != 0) {
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printk(KERN_ERR "%s(): CF slot cannot support Vpp %u\n",
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__func__, state->Vpp);
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ret = -1;
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break;
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}
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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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lubbock_set_misc_wr(misc_mask, misc_set);
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sa1111_set_io(s->dev, pa_dwr_mask, pa_dwr_set);
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}
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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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lubbock_set_misc_wr(misc_mask, 0);
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sa1111_set_io(s->dev, pa_dwr_mask, 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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.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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/*
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* Set GPIO_A<3:0> to be outputs for the MAX1600,
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* and switch to standby mode.
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*/
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sa1111_set_io_dir(sadev, GPIO_A0|GPIO_A1|GPIO_A2|GPIO_A3, 0, 0);
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sa1111_set_io(sadev, GPIO_A0|GPIO_A1|GPIO_A2|GPIO_A3, 0);
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sa1111_set_sleep_io(sadev, GPIO_A0|GPIO_A1|GPIO_A2|GPIO_A3, 0);
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/* Set CF Socket 1 power to standby mode. */
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lubbock_set_misc_wr((1 << 15) | (1 << 14), 0);
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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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