Commit a9c0629c authored by Marek Vasut's avatar Marek Vasut Committed by Eric Miao
Browse files

[ARM] pxa/balloon3: PCMCIA Support 



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

Signed-off-by: default avatarMarek Vasut <marek.vasut@gmail.com>
parent 12a2449c

arch/arm/mach-pxa/balloon3.c

+12 −1
Original line number Diff line number Diff line
@@ -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)

arch/arm/mach-pxa/include/mach/balloon3.h

+19 −17
Original line number Diff line number Diff line
@@ -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)

drivers/pcmcia/Kconfig

+1 −1
Original line number Diff line number Diff line
@@ -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

drivers/pcmcia/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -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)

drivers/pcmcia/pxa2xx_balloon3.c

0 → 100644
+158 −0
Original line number Diff line number Diff line 
/*

 * 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");