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Commit 34fdbe64 authored by Russell King's avatar Russell King
Browse files

ARM: pxa/mainstone: switch PCMCIA to MAX1600 library and gpiod APIs 



Convert mainstone to use the MAX1600 library and gpiod APIs for socket
status and control signals.

Acked-by: default avatarDominik Brodowski <linux@dominikbrodowski.net>
Signed-off-by: default avatarRussell King <rmk+kernel@armlinux.org.uk>
parent e2125d05

arch/arm/mach-pxa/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -46,6 +46,7 @@ config ARCH_LUBBOCK 


config MACH_MAINSTONE

	bool "Intel HCDDBBVA0 Development Platform (aka Mainstone)"

	select GPIO_REG

	select PXA27x



config MACH_ZYLONITE

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

+4 −0
Original line number Diff line number Diff line
@@ -119,6 +119,10 @@ 
#define MST_PCMCIA_PWR_VCC_33   0x8	   /* voltage VCC = 3.3V */

#define MST_PCMCIA_PWR_VCC_50   0x4	   /* voltage VCC = 5.0V */



#define MST_PCMCIA_INPUTS \

	(MST_PCMCIA_nIRQ | MST_PCMCIA_nSPKR_BVD2 | MST_PCMCIA_nSTSCHG_BVD1 | \

	 MST_PCMCIA_nVS2 | MST_PCMCIA_nVS1 | MST_PCMCIA_nCD)



/* board specific IRQs */

#define MAINSTONE_NR_IRQS	IRQ_BOARD_START

arch/arm/mach-pxa/mainstone.c

+53 −0
Original line number Diff line number Diff line
@@ -13,6 +13,7 @@ 
 *  published by the Free Software Foundation.

 */

#include <linux/gpio.h>

#include <linux/gpio/gpio-reg.h>

#include <linux/gpio/machine.h>

#include <linux/init.h>

#include <linux/platform_device.h>
@@ -507,12 +508,64 @@ static void __init mainstone_init_keypad(void) 
static inline void mainstone_init_keypad(void) {}

#endif



static int mst_pcmcia0_irqs[11] = {

	[0 ... 10] = -1,

	[5] = MAINSTONE_S0_CD_IRQ,

	[8] = MAINSTONE_S0_STSCHG_IRQ,

	[10] = MAINSTONE_S0_IRQ,

};



static int mst_pcmcia1_irqs[11] = {

	[0 ... 10] = -1,

	[5] = MAINSTONE_S1_CD_IRQ,

	[8] = MAINSTONE_S1_STSCHG_IRQ,

	[10] = MAINSTONE_S1_IRQ,

};



static struct gpiod_lookup_table mainstone_pcmcia_gpio_table = {

	.dev_id = "pxa2xx-pcmcia",

	.table = {

		GPIO_LOOKUP("mst-pcmcia0",  0, "a0vpp",   GPIO_ACTIVE_HIGH),

		GPIO_LOOKUP("mst-pcmcia0",  1, "a1vpp",   GPIO_ACTIVE_HIGH),

		GPIO_LOOKUP("mst-pcmcia0",  2, "a0vcc",   GPIO_ACTIVE_HIGH),

		GPIO_LOOKUP("mst-pcmcia0",  3, "a1vcc",   GPIO_ACTIVE_HIGH),

		GPIO_LOOKUP("mst-pcmcia0",  4, "areset",  GPIO_ACTIVE_HIGH),

		GPIO_LOOKUP("mst-pcmcia0",  5, "adetect", GPIO_ACTIVE_LOW),

		GPIO_LOOKUP("mst-pcmcia0",  6, "avs1",    GPIO_ACTIVE_LOW),

		GPIO_LOOKUP("mst-pcmcia0",  7, "avs2",    GPIO_ACTIVE_LOW),

		GPIO_LOOKUP("mst-pcmcia0",  8, "abvd1",   GPIO_ACTIVE_HIGH),

		GPIO_LOOKUP("mst-pcmcia0",  9, "abvd2",   GPIO_ACTIVE_HIGH),

		GPIO_LOOKUP("mst-pcmcia0", 10, "aready",  GPIO_ACTIVE_HIGH),

		GPIO_LOOKUP("mst-pcmcia1",  0, "b0vpp",   GPIO_ACTIVE_HIGH),

		GPIO_LOOKUP("mst-pcmcia1",  1, "b1vpp",   GPIO_ACTIVE_HIGH),

		GPIO_LOOKUP("mst-pcmcia1",  2, "b0vcc",   GPIO_ACTIVE_HIGH),

		GPIO_LOOKUP("mst-pcmcia1",  3, "b1vcc",   GPIO_ACTIVE_HIGH),

		GPIO_LOOKUP("mst-pcmcia1",  4, "breset",  GPIO_ACTIVE_HIGH),

		GPIO_LOOKUP("mst-pcmcia1",  5, "bdetect", GPIO_ACTIVE_LOW),

		GPIO_LOOKUP("mst-pcmcia1",  6, "bvs1",    GPIO_ACTIVE_LOW),

		GPIO_LOOKUP("mst-pcmcia1",  7, "bvs2",    GPIO_ACTIVE_LOW),

		GPIO_LOOKUP("mst-pcmcia1",  8, "bbvd1",   GPIO_ACTIVE_HIGH),

		GPIO_LOOKUP("mst-pcmcia1",  9, "bbvd2",   GPIO_ACTIVE_HIGH),

		GPIO_LOOKUP("mst-pcmcia1", 10, "bready",  GPIO_ACTIVE_HIGH),

		{ },

	},

};



static void __init mainstone_init(void)

{

	int SW7 = 0;  /* FIXME: get from SCR (Mst doc section 3.2.1.1) */



	pxa2xx_mfp_config(ARRAY_AND_SIZE(mainstone_pin_config));



	/* Register board control register(s) as GPIOs */

	gpio_reg_init(NULL, (void __iomem *)&MST_PCMCIA0, -1, 11,

		      "mst-pcmcia0", MST_PCMCIA_INPUTS, 0, NULL,

		      NULL, mst_pcmcia0_irqs);

	gpio_reg_init(NULL, (void __iomem *)&MST_PCMCIA1, -1, 11,

		      "mst-pcmcia1", MST_PCMCIA_INPUTS, 0, NULL,

		      NULL, mst_pcmcia1_irqs);

	gpiod_add_lookup_table(&mainstone_pcmcia_gpio_table);



	pxa_set_ffuart_info(NULL);

	pxa_set_btuart_info(NULL);

	pxa_set_stuart_info(NULL);

drivers/pcmcia/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -211,6 +211,7 @@ config PCMCIA_PXA2XX 
		    || MACH_VPAC270 || MACH_BALLOON3 || MACH_COLIBRI \

		    || MACH_COLIBRI320 || MACH_H4700)

	select PCMCIA_SOC_COMMON

	select PCMCIA_MAX1600 if MACH_MAINSTONE

	help

	  Say Y here to include support for the PXA2xx PCMCIA controller

drivers/pcmcia/pxa2xx_mainstone.c

+34 −79
Original line number Diff line number Diff line
@@ -11,56 +11,55 @@ 
 * it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation.

 */



#include <linux/gpio/consumer.h>

#include <linux/module.h>

#include <linux/init.h>

#include <linux/interrupt.h>

#include <linux/kernel.h>

#include <linux/errno.h>

#include <linux/interrupt.h>

#include <linux/platform_device.h>



#include <pcmcia/ss.h>



#include <asm/mach-types.h>

#include <asm/irq.h>



#include <mach/pxa2xx-regs.h>

#include <mach/mainstone.h>



#include "soc_common.h"



#include "max1600.h"



static int mst_pcmcia_hw_init(struct soc_pcmcia_socket *skt)

{

	/*

	 * Setup default state of GPIO outputs

	 * before we enable them as outputs.

	 */

	if (skt->nr == 0) {

		skt->socket.pci_irq = MAINSTONE_S0_IRQ;

		skt->stat[SOC_STAT_CD].irq = MAINSTONE_S0_CD_IRQ;

		skt->stat[SOC_STAT_CD].name = "PCMCIA0 CD";

		skt->stat[SOC_STAT_BVD1].irq = MAINSTONE_S0_STSCHG_IRQ;

		skt->stat[SOC_STAT_BVD1].name = "PCMCIA0 STSCHG";

	} else {

		skt->socket.pci_irq = MAINSTONE_S1_IRQ;

		skt->stat[SOC_STAT_CD].irq = MAINSTONE_S1_CD_IRQ;

		skt->stat[SOC_STAT_CD].name = "PCMCIA1 CD";

		skt->stat[SOC_STAT_BVD1].irq = MAINSTONE_S1_STSCHG_IRQ;

		skt->stat[SOC_STAT_BVD1].name = "PCMCIA1 STSCHG";

	}

	return 0;

	struct device *dev = skt->socket.dev.parent;

	struct max1600 *m;

	int ret;



	skt->stat[SOC_STAT_CD].name = skt->nr ? "bdetect" : "adetect";

	skt->stat[SOC_STAT_BVD1].name = skt->nr ? "bbvd1" : "abvd1";

	skt->stat[SOC_STAT_BVD2].name = skt->nr ? "bbvd2" : "abvd2";

	skt->stat[SOC_STAT_RDY].name = skt->nr ? "bready" : "aready";

	skt->stat[SOC_STAT_VS1].name = skt->nr ? "bvs1" : "avs1";

	skt->stat[SOC_STAT_VS2].name = skt->nr ? "bvs2" : "avs2";



	skt->gpio_reset = devm_gpiod_get(dev, skt->nr ? "breset" : "areset",

					 GPIOD_OUT_HIGH);

	if (IS_ERR(skt->gpio_reset))

		return PTR_ERR(skt->gpio_reset);



	ret = max1600_init(dev, &m, skt->nr ? MAX1600_CHAN_B : MAX1600_CHAN_A,

			   MAX1600_CODE_HIGH);

	if (ret)

		return ret;



	skt->driver_data = m;



	return soc_pcmcia_request_gpiods(skt);

}



static unsigned long mst_pcmcia_status[2];

static unsigned int mst_pcmcia_bvd1_status[2];



static void mst_pcmcia_socket_state(struct soc_pcmcia_socket *skt,

				    struct pcmcia_state *state)

{

	unsigned long status, flip;



	status = (skt->nr == 0) ? MST_PCMCIA0 : MST_PCMCIA1;

	flip = (status ^ mst_pcmcia_status[skt->nr]) & MST_PCMCIA_nSTSCHG_BVD1;

	unsigned int flip = mst_pcmcia_bvd1_status[skt->nr] ^ state->bvd1;



	/*

	 * Workaround for STSCHG which can't be deasserted:
@@ -68,62 +67,18 @@ static void mst_pcmcia_socket_state(struct soc_pcmcia_socket *skt, 
	 * as needed to avoid IRQ locks.

	 */

	if (flip) {

		mst_pcmcia_status[skt->nr] = status;

		if (status & MST_PCMCIA_nSTSCHG_BVD1)

			enable_irq( (skt->nr == 0) ? MAINSTONE_S0_STSCHG_IRQ

						   : MAINSTONE_S1_STSCHG_IRQ );

		mst_pcmcia_bvd1_status[skt->nr] = state->bvd1;

		if (state->bvd1)

			enable_irq(skt->stat[SOC_STAT_BVD1].irq);

		else

			disable_irq( (skt->nr == 0) ? MAINSTONE_S0_STSCHG_IRQ

						    : MAINSTONE_S1_STSCHG_IRQ );

			disable_irq(skt->stat[SOC_STAT_BVD2].irq);

	}



	state->detect = (status & MST_PCMCIA_nCD) ? 0 : 1;

	state->ready  = (status & MST_PCMCIA_nIRQ) ? 1 : 0;

	state->bvd1   = (status & MST_PCMCIA_nSTSCHG_BVD1) ? 1 : 0;

	state->bvd2   = (status & MST_PCMCIA_nSPKR_BVD2) ? 1 : 0;

	state->vs_3v  = (status & MST_PCMCIA_nVS1) ? 0 : 1;

	state->vs_Xv  = (status & MST_PCMCIA_nVS2) ? 0 : 1;

}



static int mst_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,

				       const socket_state_t *state)

{

	unsigned long power = 0;

	int ret = 0;



	switch (state->Vcc) {

	case 0:  power |= MST_PCMCIA_PWR_VCC_0;  break;

	case 33: power |= MST_PCMCIA_PWR_VCC_33; break;

	case 50: power |= MST_PCMCIA_PWR_VCC_50; break;

	default:

		 printk(KERN_ERR "%s(): bad Vcc %u\n",

				 __func__, state->Vcc);

		 ret = -1;

	}



	switch (state->Vpp) {

	case 0:   power |= MST_PCMCIA_PWR_VPP_0;   break;

	case 120: power |= MST_PCMCIA_PWR_VPP_120; break;

	default:

		  if(state->Vpp == state->Vcc) {

			  power |= MST_PCMCIA_PWR_VPP_VCC;

		  } else {

			  printk(KERN_ERR "%s(): bad Vpp %u\n",

					  __func__, state->Vpp);

			  ret = -1;

		  }

	}



	if (state->flags & SS_RESET)

	       power |= MST_PCMCIA_RESET;



	switch (skt->nr) {

	case 0:  MST_PCMCIA0 = power; break;

	case 1:  MST_PCMCIA1 = power; break;

	default: ret = -1;

	}



	return ret;

	return max1600_configure(skt->driver_data, state->Vcc, state->Vpp);

}



static struct pcmcia_low_level mst_pcmcia_ops __initdata = {