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[ARM] pxa/balloon3: PCMCIA Support

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This driver adds support for the on-board CF socket.

Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
This commit is contained in:
Marek Vasut 2010-07-27 21:48:10 +02:00 committed by Eric Miao
parent 12a2449c79
commit a9c0629cde
5 changed files with 191 additions and 19 deletions
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13
arch/arm/mach-pxa/balloon3.c
View File

@ -88,6 +88,18 @@ static unsigned long balloon3_pin_config[] __initdata = {
/* USB Host */
GPIO88_USBH1_PWR,
GPIO89_USBH1_PEN,
/* PC Card */
GPIO48_nPOE,
GPIO49_nPWE,
GPIO50_nPIOR,
GPIO51_nPIOW,
GPIO85_nPCE_1,
GPIO54_nPCE_2,
GPIO79_PSKTSEL,
GPIO55_nPREG,
GPIO56_nPWAIT,
GPIO57_nIOIS16,
};
/******************************************************************************
@ -405,7 +417,6 @@ static void balloon3_irq_handler(unsigned int irq, struct irq_desc *desc)
{
unsigned long pending = __raw_readl(BALLOON3_INT_CONTROL_REG) &
balloon3_irq_enabled;
do {
/* clear useless edge notification */
if (desc->chip->ack)

36
arch/arm/mach-pxa/include/mach/balloon3.h
View File

@ -26,10 +26,12 @@ enum balloon3_features {
#define BALLOON3_FPGA_VIRT (0xf1000000) /* as per balloon2 */
#define BALLOON3_FPGA_LENGTH 0x01000000
/* FPGA/CPLD registers */
#define BALLOON3_PCMCIA0_REG (BALLOON3_FPGA_VIRT + 0x00e00008)
/* fixme - same for now */
#define BALLOON3_PCMCIA1_REG (BALLOON3_FPGA_VIRT + 0x00e00008)
/* FPGA / CPLD registers for CF socket */
#define BALLOON3_CF_STATUS_REG (BALLOON3_FPGA_VIRT + 0x00e00008)
#define BALLOON3_CF_CONTROL_REG (BALLOON3_FPGA_VIRT + 0x00e00008)
/* FPGA / CPLD version register */
#define BALLOON3_FPGA_VER (BALLOON3_FPGA_VIRT + 0x00e0001c)
#define BALLOON3_NANDIO_IO_REG (BALLOON3_FPGA_VIRT + 0x00e00000)
/* fpga/cpld interrupt control register */
#define BALLOON3_INT_CONTROL_REG (BALLOON3_FPGA_VIRT + 0x00e0000C)
@ -41,6 +43,19 @@ enum balloon3_features {
#define BALLOON3_SAMOSA_DATA_REG (BALLOON3_FPGA_VIRT + 0x00c00004)
#define BALLOON3_SAMOSA_STATUS_REG (BALLOON3_FPGA_VIRT + 0x00c0001c)
/* CF Status Register bits (read-only) bits */
#define BALLOON3_CF_nIRQ (1 << 0)
#define BALLOON3_CF_nSTSCHG_BVD1 (1 << 1)
/* CF Control Set Register bits / CF Control Clear Register bits (write-only) */
#define BALLOON3_CF_RESET (1 << 0)
#define BALLOON3_CF_ENABLE (1 << 1)
#define BALLOON3_CF_ADD_ENABLE (1 << 2)
/* CF Interrupt sources */
#define BALLOON3_BP_CF_NRDY_IRQ BALLOON3_IRQ(0)
#define BALLOON3_BP_NSTSCHG_IRQ BALLOON3_IRQ(1)
/* GPIOs for irqs */
#define BALLOON3_GPIO_AUX_NIRQ (94)
#define BALLOON3_GPIO_CODEC_IRQ (95)
@ -58,16 +73,6 @@ enum balloon3_features {
#define BALLOON3_INT_S0_IRQ (1 << 0) /* PCMCIA 0 IRQ */
#define BALLOON3_INT_S0_STSCHG (1 << 1) /* PCMCIA 0 status changed */
/* CF Status Register */
#define BALLOON3_PCMCIA_nIRQ (1 << 0) /* IRQ / ready signal */
#define BALLOON3_PCMCIA_nSTSCHG_BVD1 (1 << 1)
/* VDD sense / card status changed */
/* CF control register (write) */
#define BALLOON3_PCMCIA_RESET (1 << 0) /* Card reset signal */
#define BALLOON3_PCMCIA_ENABLE (1 << 1)
#define BALLOON3_PCMCIA_ADD_ENABLE (1 << 2)
/* CPLD (and FPGA) interface definitions */
#define CPLD_LCD0_DATA_SET 0x00
#define CPLD_LCD0_DATA_CLR 0x10
@ -132,9 +137,6 @@ enum balloon3_features {
/* Balloon3 Interrupts */
#define BALLOON3_IRQ(x) (IRQ_BOARD_START + (x))
#define BALLOON3_BP_CF_NRDY_IRQ BALLOON3_IRQ(0)
#define BALLOON3_BP_NSTSCHG_IRQ BALLOON3_IRQ(1)
#define BALLOON3_AUX_NIRQ IRQ_GPIO(BALLOON3_GPIO_AUX_NIRQ)
#define BALLOON3_CODEC_IRQ IRQ_GPIO(BALLOON3_GPIO_CODEC_IRQ)
#define BALLOON3_S0_CD_IRQ IRQ_GPIO(BALLOON3_GPIO_S0_CD)

2
drivers/pcmcia/Kconfig
View File

@ -215,7 +215,7 @@ config PCMCIA_PXA2XX
depends on (ARCH_LUBBOCK || MACH_MAINSTONE || PXA_SHARPSL \
|| MACH_ARMCORE || ARCH_PXA_PALM || TRIZEPS_PCMCIA \
|| ARCOM_PCMCIA || ARCH_PXA_ESERIES || MACH_STARGATE2 \
|| MACH_VPAC270)
|| MACH_VPAC270 || MACH_BALLOON3)
select PCMCIA_SOC_COMMON
help
Say Y here to include support for the PXA2xx PCMCIA controller

1
drivers/pcmcia/Makefile
View File

@ -70,6 +70,7 @@ pxa2xx-obj-$(CONFIG_MACH_PALMLD) += pxa2xx_palmld.o
pxa2xx-obj-$(CONFIG_MACH_E740) += pxa2xx_e740.o
pxa2xx-obj-$(CONFIG_MACH_STARGATE2) += pxa2xx_stargate2.o
pxa2xx-obj-$(CONFIG_MACH_VPAC270) += pxa2xx_vpac270.o
pxa2xx-obj-$(CONFIG_MACH_BALLOON3) += pxa2xx_balloon3.o
obj-$(CONFIG_PCMCIA_PXA2XX) += pxa2xx_base.o $(pxa2xx-obj-y)

158
drivers/pcmcia/pxa2xx_balloon3.c Normal file
View File

@ -0,0 +1,158 @@
/*
* linux/drivers/pcmcia/pxa2xx_balloon3.c
*
* Balloon3 PCMCIA specific routines.
*
* Author: Nick Bane
* Created: June, 2006
* Copyright: Toby Churchill Ltd
* Derived from pxa2xx_mainstone.c, by Nico Pitre
*
* Various modification by Marek Vasut <marek.vasut@gmail.com>
*
* 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.
*/
#include <linux/module.h>
#include <linux/gpio.h>
#include <linux/errno.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/irq.h>
#include <linux/io.h>
#include <mach/balloon3.h>
#include "soc_common.h"
/*
* These are a list of interrupt sources that provokes a polled
* check of status
*/
static struct pcmcia_irqs irqs[] = {
{ 0, BALLOON3_S0_CD_IRQ, "PCMCIA0 CD" },
{ 0, BALLOON3_BP_NSTSCHG_IRQ, "PCMCIA0 STSCHG" },
};
static int balloon3_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
{
uint16_t ver;
int ret;
static void __iomem *fpga_ver;
ver = __raw_readw(BALLOON3_FPGA_VER);
if (ver > 0x0201)
pr_warn("The FPGA code, version 0x%04x, is newer than rel-0.3. "
"PCMCIA/CF support might be broken in this version!",
ver);
skt->socket.pci_irq = BALLOON3_BP_CF_NRDY_IRQ;
return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
}
static void balloon3_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
{
soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs));
}
static unsigned long balloon3_pcmcia_status[2] = {
BALLOON3_CF_nSTSCHG_BVD1,
BALLOON3_CF_nSTSCHG_BVD1
};
static void balloon3_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
struct pcmcia_state *state)
{
uint16_t status;
int flip;
/* This actually reads the STATUS register */
status = __raw_readw(BALLOON3_CF_STATUS_REG);
flip = (status ^ balloon3_pcmcia_status[skt->nr])
& BALLOON3_CF_nSTSCHG_BVD1;
/*
* Workaround for STSCHG which can't be deasserted:
* We therefore disable/enable corresponding IRQs
* as needed to avoid IRQ locks.
*/
if (flip) {
balloon3_pcmcia_status[skt->nr] = status;
if (status & BALLOON3_CF_nSTSCHG_BVD1)
enable_irq(BALLOON3_BP_NSTSCHG_IRQ);
else
disable_irq(BALLOON3_BP_NSTSCHG_IRQ);
}
state->detect = !gpio_get_value(BALLOON3_GPIO_S0_CD);
state->ready = !!(status & BALLOON3_CF_nIRQ);
state->bvd1 = !!(status & BALLOON3_CF_nSTSCHG_BVD1);
state->bvd2 = 0; /* not available */
state->vs_3v = 1; /* Always true its a CF card */
state->vs_Xv = 0; /* not available */
state->wrprot = 0; /* not available */
}
static int balloon3_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
const socket_state_t *state)
{
__raw_writew((state->flags & SS_RESET) ? BALLOON3_CF_RESET : 0,
BALLOON3_CF_CONTROL_REG);
return 0;
}
static void balloon3_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
{
}
static void balloon3_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
{
}
static struct pcmcia_low_level balloon3_pcmcia_ops = {
.owner = THIS_MODULE,
.hw_init = balloon3_pcmcia_hw_init,
.hw_shutdown = balloon3_pcmcia_hw_shutdown,
.socket_state = balloon3_pcmcia_socket_state,
.configure_socket = balloon3_pcmcia_configure_socket,
.socket_init = balloon3_pcmcia_socket_init,
.socket_suspend = balloon3_pcmcia_socket_suspend,
.first = 0,
.nr = 1,
};
static struct platform_device *balloon3_pcmcia_device;
static int __init balloon3_pcmcia_init(void)
{
int ret;
balloon3_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
if (!balloon3_pcmcia_device)
return -ENOMEM;
ret = platform_device_add_data(balloon3_pcmcia_device,
&balloon3_pcmcia_ops, sizeof(balloon3_pcmcia_ops));
if (!ret)
ret = platform_device_add(balloon3_pcmcia_device);
if (ret)
platform_device_put(balloon3_pcmcia_device);
return ret;
}
static void __exit balloon3_pcmcia_exit(void)
{
platform_device_unregister(balloon3_pcmcia_device);
}
module_init(balloon3_pcmcia_init);
module_exit(balloon3_pcmcia_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Nick Bane <nick@cecomputing.co.uk>");
MODULE_ALIAS("platform:pxa2xx-pcmcia");
MODULE_DESCRIPTION("Balloon3 board CF/PCMCIA driver");