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Commit 5c9e4d8c authored by Russell King's avatar Russell King
Browse files

ARM: sa1100/neponset: convert serial to use gpiod APIs 



Convert the serial modem control signals to use the gpiod APIs rather
than the private platform callbacks.

Signed-off-by: default avatarRussell King <rmk+kernel@armlinux.org.uk>
parent cf56ffaa

arch/arm/mach-sa1100/neponset.c

+28 −81
Original line number Diff line number Diff line
@@ -11,7 +11,6 @@ 
#include <linux/irq.h>

#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/platform_data/sa11x0-serial.h>

#include <linux/platform_device.h>

#include <linux/pm.h>

#include <linux/serial_core.h>
@@ -49,23 +48,8 @@ 
#define IRR_SA1111	(1 << 2)



#define NCR_NGPIO	7



#define MDM_CTL0_RTS1	(1 << 0)

#define MDM_CTL0_DTR1	(1 << 1)

#define MDM_CTL0_RTS2	(1 << 2)

#define MDM_CTL0_DTR2	(1 << 3)

#define MDM_CTL0_NGPIO	4



#define MDM_CTL1_CTS1	(1 << 0)

#define MDM_CTL1_DSR1	(1 << 1)

#define MDM_CTL1_DCD1	(1 << 2)

#define MDM_CTL1_CTS2	(1 << 3)

#define MDM_CTL1_DSR2	(1 << 4)

#define MDM_CTL1_DCD2	(1 << 5)

#define MDM_CTL1_NGPIO	6



#define AUD_SEL_1341	(1 << 0)

#define AUD_MUTE_1341	(1 << 1)

#define AUD_NGPIO	2



extern void sa1110_mb_disable(void);
@@ -97,6 +81,30 @@ struct neponset_drvdata { 
	struct gpio_chip *gpio[4];

};



static struct gpiod_lookup_table neponset_uart1_gpio_table = {

	.dev_id = "sa11x0-uart.1",

	.table = {

		GPIO_LOOKUP("neponset-mdm-ctl0", 2, "rts", GPIO_ACTIVE_LOW),

		GPIO_LOOKUP("neponset-mdm-ctl0", 3, "dtr", GPIO_ACTIVE_LOW),

		GPIO_LOOKUP("neponset-mdm-ctl1", 3, "cts", GPIO_ACTIVE_LOW),

		GPIO_LOOKUP("neponset-mdm-ctl1", 4, "dsr", GPIO_ACTIVE_LOW),

		GPIO_LOOKUP("neponset-mdm-ctl1", 5, "dcd", GPIO_ACTIVE_LOW),

		{ },

	},

};



static struct gpiod_lookup_table neponset_uart3_gpio_table = {

	.dev_id = "sa11x0-uart.3",

	.table = {

		GPIO_LOOKUP("neponset-mdm-ctl0", 0, "rts", GPIO_ACTIVE_LOW),

		GPIO_LOOKUP("neponset-mdm-ctl0", 1, "dtr", GPIO_ACTIVE_LOW),

		GPIO_LOOKUP("neponset-mdm-ctl1", 0, "cts", GPIO_ACTIVE_LOW),

		GPIO_LOOKUP("neponset-mdm-ctl1", 1, "dsr", GPIO_ACTIVE_LOW),

		GPIO_LOOKUP("neponset-mdm-ctl1", 2, "dcd", GPIO_ACTIVE_LOW),

		{ },

	},

};



static struct gpiod_lookup_table neponset_pcmcia_table = {

	.dev_id = "1800",

	.table = {
@@ -124,69 +132,6 @@ void neponset_ncr_frob(unsigned int mask, unsigned int val) 
}

EXPORT_SYMBOL(neponset_ncr_frob);



static void neponset_set_mctrl(struct uart_port *port, u_int mctrl)

{

	struct neponset_drvdata *n = nep;

	unsigned long mask, val = 0;



	if (!n)

		return;



	if (port->mapbase == _Ser1UTCR0) {

		mask = MDM_CTL0_RTS2 | MDM_CTL0_DTR2;



		if (!(mctrl & TIOCM_RTS))

			val |= MDM_CTL0_RTS2;



		if (!(mctrl & TIOCM_DTR))

			val |= MDM_CTL0_DTR2;

	} else if (port->mapbase == _Ser3UTCR0) {

		mask = MDM_CTL0_RTS1 | MDM_CTL0_DTR1;



		if (!(mctrl & TIOCM_RTS))

			val |= MDM_CTL0_RTS1;



		if (!(mctrl & TIOCM_DTR))

			val |= MDM_CTL0_DTR1;

	}



	n->gpio[1]->set_multiple(n->gpio[1], &mask, &val);

}



static u_int neponset_get_mctrl(struct uart_port *port)

{

	void __iomem *base = nep->base;

	u_int ret = TIOCM_CD | TIOCM_CTS | TIOCM_DSR;

	u_int mdm_ctl1;



	if (!base)

		return ret;



	mdm_ctl1 = readb_relaxed(base + MDM_CTL_1);

	if (port->mapbase == _Ser1UTCR0) {

		if (mdm_ctl1 & MDM_CTL1_DCD2)

			ret &= ~TIOCM_CD;

		if (mdm_ctl1 & MDM_CTL1_CTS2)

			ret &= ~TIOCM_CTS;

		if (mdm_ctl1 & MDM_CTL1_DSR2)

			ret &= ~TIOCM_DSR;

	} else if (port->mapbase == _Ser3UTCR0) {

		if (mdm_ctl1 & MDM_CTL1_DCD1)

			ret &= ~TIOCM_CD;

		if (mdm_ctl1 & MDM_CTL1_CTS1)

			ret &= ~TIOCM_CTS;

		if (mdm_ctl1 & MDM_CTL1_DSR1)

			ret &= ~TIOCM_DSR;

	}



	return ret;

}



static struct sa1100_port_fns neponset_port_fns = {

	.set_mctrl	= neponset_set_mctrl,

	.get_mctrl	= neponset_get_mctrl,

};



/*

 * Install handler for Neponset IRQ.  Note that we have to loop here

 * since the ETHERNET and USAR IRQs are level based, and we need to
@@ -388,6 +333,8 @@ static int neponset_probe(struct platform_device *dev) 
			   d->base + AUD_CTL, AUD_NGPIO, false,

			   neponset_aud_names);



	gpiod_add_lookup_table(&neponset_uart1_gpio_table);

	gpiod_add_lookup_table(&neponset_uart3_gpio_table);

	gpiod_add_lookup_table(&neponset_pcmcia_table);



	/*
@@ -402,8 +349,6 @@ static int neponset_probe(struct platform_device *dev) 
		 d->irq_base, d->irq_base + NEP_IRQ_NR - 1);

	nep = d;



	sa1100_register_uart_fns(&neponset_port_fns);



	/* Ensure that the memory bus request/grant signals are setup */

	sa1110_mb_disable();
@@ -442,6 +387,8 @@ static int neponset_remove(struct platform_device *dev) 
		platform_device_unregister(d->smc91x);



	gpiod_remove_lookup_table(&neponset_pcmcia_table);

	gpiod_remove_lookup_table(&neponset_uart3_gpio_table);

	gpiod_remove_lookup_table(&neponset_uart1_gpio_table);



	irq_set_chained_handler(irq, NULL);

	irq_free_descs(d->irq_base, NEP_IRQ_NR);