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Release 4.14 drivers/pcmcia/sa1111_lubbock.c

Directory: drivers/pcmcia
/*
 * linux/drivers/pcmcia/pxa2xx_lubbock.c
 *
 * Author:      George Davis
 * Created:     Jan 10, 2002
 * Copyright:   MontaVista Software Inc.
 *
 * 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.
 *
 * 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 <mach/lubbock.h>

#include "sa1111_generic.h"


static int lubbock_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state) { struct sa1111_pcmcia_socket *s = to_skt(skt); unsigned int pa_dwr_mask, pa_dwr_set, misc_mask, misc_set; int ret = 0; pa_dwr_mask = pa_dwr_set = misc_mask = misc_set = 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: pa_dwr_mask = GPIO_A0 | GPIO_A1 | GPIO_A2 | GPIO_A3; switch (state->Vcc) { case 0: /* Hi-Z */ break; case 33: /* VY */ pa_dwr_set |= GPIO_A3; break; case 50: /* VX */ pa_dwr_set |= GPIO_A2; break; default: printk(KERN_ERR "%s(): unrecognized Vcc %u\n", __func__, state->Vcc); ret = -1; } switch (state->Vpp) { case 0: /* Hi-Z */ break; case 120: /* 12IN */ pa_dwr_set |= GPIO_A1; break; default: /* VCC */ if (state->Vpp == state->Vcc) pa_dwr_set |= GPIO_A0; else { printk(KERN_ERR "%s(): unrecognized Vpp %u\n", __func__, state->Vpp); ret = -1; break; } } break; case 1: misc_mask = (1 << 15) | (1 << 14); switch (state->Vcc) { case 0: /* Hi-Z */ break; case 33: /* VY */ misc_set |= 1 << 15; break; case 50: /* VX */ misc_set |= 1 << 14; break; default: printk(KERN_ERR "%s(): unrecognized Vcc %u\n", __func__, state->Vcc); ret = -1; break; } if (state->Vpp != state->Vcc && state->Vpp != 0) { printk(KERN_ERR "%s(): CF slot cannot support Vpp %u\n", __func__, state->Vpp); ret = -1; break; } break; default: ret = -1; } if (ret == 0) ret = sa1111_pcmcia_configure_socket(skt, state); if (ret == 0) { lubbock_set_misc_wr(misc_mask, misc_set); sa1111_set_io(s->dev, pa_dwr_mask, pa_dwr_set); } #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 */ lubbock_set_misc_wr(misc_mask, 0); sa1111_set_io(s->dev, pa_dwr_mask, 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; }

Contributors

PersonTokensPropCommitsCommitProp
Nico Pitre30768.83%233.33%
Russell King13430.04%233.33%
Harvey Harrison40.90%116.67%
Lucas De Marchi10.22%116.67%
Total446100.00%6100.00%

static struct pcmcia_low_level lubbock_pcmcia_ops = { .owner = THIS_MODULE, .configure_socket = lubbock_pcmcia_configure_socket, .first = 0, .nr = 2, }; #include "pxa2xx_base.h"
int pcmcia_lubbock_init(struct sa1111_dev *sadev) { /* * Set GPIO_A<3:0> to be outputs for the MAX1600, * and switch to standby mode. */ sa1111_set_io_dir(sadev, GPIO_A0|GPIO_A1|GPIO_A2|GPIO_A3, 0, 0); sa1111_set_io(sadev, GPIO_A0|GPIO_A1|GPIO_A2|GPIO_A3, 0); sa1111_set_sleep_io(sadev, GPIO_A0|GPIO_A1|GPIO_A2|GPIO_A3, 0); /* Set CF Socket 1 power to standby mode. */ lubbock_set_misc_wr((1 << 15) | (1 << 14), 0); 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); }

Contributors

PersonTokensPropCommitsCommitProp
Russell King6562.50%350.00%
Nico Pitre2826.92%116.67%
Pavel Machek87.69%116.67%
Robert Jarzmik32.88%116.67%
Total104100.00%6100.00%

MODULE_LICENSE("GPL");

Overall Contributors

PersonTokensPropCommitsCommitProp
Nico Pitre38962.84%216.67%
Russell King20933.76%541.67%
Pavel Machek81.29%18.33%
George G. Davis50.81%18.33%
Harvey Harrison40.65%18.33%
Robert Jarzmik30.48%18.33%
Lucas De Marchi10.16%18.33%
Total619100.00%12100.00%
Directory: drivers/pcmcia
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