[ARM] 2897/2: PXA2xx IRDA support
Patch from Nicolas Pitre This is the PXA2xx common IRDA driver, plus platform support for Lubbock and Mainstone. Signed-off-by: Nicolas Pitre <nico@cam.org> Acked-by: Jean Tourrilhes <jt@hpl.hp.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Nicolas Pitre
Russell King
parent
a999cb04b4
commit
6f475c0133
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@ -34,6 +34,7 @@
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#include <asm/arch/udc.h>
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#include <asm/arch/pxafb.h>
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#include <asm/arch/mmc.h>
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#include <asm/arch/irda.h>
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#include <asm/arch/i2c.h>
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#include "generic.h"
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@ -301,6 +302,22 @@ static struct platform_device i2s_device = {
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.num_resources = ARRAY_SIZE(i2s_resources),
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};
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static u64 pxaficp_dmamask = ~(u32)0;
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static struct platform_device pxaficp_device = {
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.name = "pxa2xx-ir",
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.id = -1,
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.dev = {
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.dma_mask = &pxaficp_dmamask,
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.coherent_dma_mask = 0xffffffff,
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},
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};
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void __init pxa_set_ficp_info(struct pxaficp_platform_data *info)
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{
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pxaficp_device.dev.platform_data = info;
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}
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static struct platform_device *devices[] __initdata = {
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&pxamci_device,
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&udc_device,
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@ -308,6 +325,7 @@ static struct platform_device *devices[] __initdata = {
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&ffuart_device,
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&btuart_device,
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&stuart_device,
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&pxaficp_device,
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&i2c_device,
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&i2s_device,
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};
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@ -35,6 +35,7 @@
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#include <asm/arch/pxa-regs.h>
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#include <asm/arch/lubbock.h>
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#include <asm/arch/udc.h>
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#include <asm/arch/irda.h>
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#include <asm/arch/pxafb.h>
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#include <asm/arch/mmc.h>
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@ -237,11 +238,30 @@ static struct pxamci_platform_data lubbock_mci_platform_data = {
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.init = lubbock_mci_init,
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};
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static void lubbock_irda_transceiver_mode(struct device *dev, int mode)
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{
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unsigned long flags;
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local_irq_save(flags);
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if (mode & IR_SIRMODE) {
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LUB_MISC_WR &= ~(1 << 4);
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} else if (mode & IR_FIRMODE) {
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LUB_MISC_WR |= 1 << 4;
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}
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local_irq_restore(flags);
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}
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static struct pxaficp_platform_data lubbock_ficp_platform_data = {
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.transceiver_cap = IR_SIRMODE | IR_FIRMODE,
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.transceiver_mode = lubbock_irda_transceiver_mode,
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};
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static void __init lubbock_init(void)
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{
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pxa_set_udc_info(&udc_info);
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set_pxa_fb_info(&sharp_lm8v31);
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pxa_set_mci_info(&lubbock_mci_platform_data);
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pxa_set_ficp_info(&lubbock_ficp_platform_data);
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(void) platform_add_devices(devices, ARRAY_SIZE(devices));
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}
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@ -37,6 +37,7 @@
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#include <asm/arch/audio.h>
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#include <asm/arch/pxafb.h>
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#include <asm/arch/mmc.h>
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#include <asm/arch/irda.h>
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#include "generic.h"
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@ -294,6 +295,29 @@ static struct pxamci_platform_data mainstone_mci_platform_data = {
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.exit = mainstone_mci_exit,
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};
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static void mainstone_irda_transceiver_mode(struct device *dev, int mode)
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{
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unsigned long flags;
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local_irq_save(flags);
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if (mode & IR_SIRMODE) {
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MST_MSCWR1 &= ~MST_MSCWR1_IRDA_FIR;
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} else if (mode & IR_FIRMODE) {
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MST_MSCWR1 |= MST_MSCWR1_IRDA_FIR;
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}
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if (mode & IR_OFF) {
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MST_MSCWR1 = (MST_MSCWR1 & ~MST_MSCWR1_IRDA_MASK) | MST_MSCWR1_IRDA_OFF;
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} else {
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MST_MSCWR1 = (MST_MSCWR1 & ~MST_MSCWR1_IRDA_MASK) | MST_MSCWR1_IRDA_FULL;
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}
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local_irq_restore(flags);
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}
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static struct pxaficp_platform_data mainstone_ficp_platform_data = {
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.transceiver_cap = IR_SIRMODE | IR_FIRMODE | IR_OFF,
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.transceiver_mode = mainstone_irda_transceiver_mode,
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};
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static void __init mainstone_init(void)
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{
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/*
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@ -313,6 +337,7 @@ static void __init mainstone_init(void)
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set_pxa_fb_info(&toshiba_ltm035a776c);
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pxa_set_mci_info(&mainstone_mci_platform_data);
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pxa_set_ficp_info(&mainstone_ficp_platform_data);
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}
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@ -400,5 +400,15 @@ config VIA_FIR
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To compile it as a module, choose M here: the module will be called
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via-ircc.
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config PXA_FICP
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tristate "Intel PXA2xx Internal FICP"
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depends on ARCH_PXA && IRDA
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help
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Say Y or M here if you want to build support for the PXA2xx
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built-in IRDA interface which can support both SIR and FIR.
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This driver relies on platform specific helper routines so
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available capabilities may vary from one PXA2xx target to
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another.
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endmenu
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@ -18,6 +18,7 @@ obj-$(CONFIG_SMC_IRCC_FIR) += smsc-ircc2.o
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obj-$(CONFIG_ALI_FIR) += ali-ircc.o
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obj-$(CONFIG_VLSI_FIR) += vlsi_ir.o
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obj-$(CONFIG_VIA_FIR) += via-ircc.o
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obj-$(CONFIG_PXA_FICP) += pxaficp_ir.o
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# Old dongle drivers for old SIR drivers
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obj-$(CONFIG_ESI_DONGLE_OLD) += esi.o
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obj-$(CONFIG_TEKRAM_DONGLE_OLD) += tekram.o
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871
drivers/net/irda/pxaficp_ir.c
Normal file
871
drivers/net/irda/pxaficp_ir.c
Normal file
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@ -0,0 +1,871 @@
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/*
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* linux/drivers/net/irda/pxaficp_ir.c
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*
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* Based on sa1100_ir.c by Russell King
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*
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* Changes copyright (C) 2003-2005 MontaVista Software, Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* Infra-red driver (SIR/FIR) for the PXA2xx embedded microprocessor
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*
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*/
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#include <linux/config.h>
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/init.h>
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#include <linux/errno.h>
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#include <linux/netdevice.h>
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#include <linux/slab.h>
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#include <linux/rtnetlink.h>
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#include <linux/interrupt.h>
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#include <linux/dma-mapping.h>
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#include <linux/pm.h>
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#include <net/irda/irda.h>
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#include <net/irda/irmod.h>
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#include <net/irda/wrapper.h>
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#include <net/irda/irda_device.h>
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#include <asm/irq.h>
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#include <asm/dma.h>
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#include <asm/delay.h>
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#include <asm/hardware.h>
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#include <asm/arch/irda.h>
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#include <asm/arch/pxa-regs.h>
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#ifdef CONFIG_MACH_MAINSTONE
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#include <asm/arch/mainstone.h>
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#endif
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#define IrSR_RXPL_NEG_IS_ZERO (1<<4)
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#define IrSR_RXPL_POS_IS_ZERO 0x0
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#define IrSR_TXPL_NEG_IS_ZERO (1<<3)
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#define IrSR_TXPL_POS_IS_ZERO 0x0
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#define IrSR_XMODE_PULSE_1_6 (1<<2)
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#define IrSR_XMODE_PULSE_3_16 0x0
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#define IrSR_RCVEIR_IR_MODE (1<<1)
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#define IrSR_RCVEIR_UART_MODE 0x0
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#define IrSR_XMITIR_IR_MODE (1<<0)
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#define IrSR_XMITIR_UART_MODE 0x0
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#define IrSR_IR_RECEIVE_ON (\
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IrSR_RXPL_NEG_IS_ZERO | \
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IrSR_TXPL_POS_IS_ZERO | \
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IrSR_XMODE_PULSE_3_16 | \
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IrSR_RCVEIR_IR_MODE | \
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IrSR_XMITIR_UART_MODE)
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#define IrSR_IR_TRANSMIT_ON (\
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IrSR_RXPL_NEG_IS_ZERO | \
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IrSR_TXPL_POS_IS_ZERO | \
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IrSR_XMODE_PULSE_3_16 | \
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IrSR_RCVEIR_UART_MODE | \
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IrSR_XMITIR_IR_MODE)
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struct pxa_irda {
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int speed;
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int newspeed;
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unsigned long last_oscr;
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unsigned char *dma_rx_buff;
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unsigned char *dma_tx_buff;
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dma_addr_t dma_rx_buff_phy;
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dma_addr_t dma_tx_buff_phy;
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unsigned int dma_tx_buff_len;
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int txdma;
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int rxdma;
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struct net_device_stats stats;
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struct irlap_cb *irlap;
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struct qos_info qos;
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iobuff_t tx_buff;
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iobuff_t rx_buff;
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struct device *dev;
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struct pxaficp_platform_data *pdata;
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};
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#define IS_FIR(si) ((si)->speed >= 4000000)
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#define IRDA_FRAME_SIZE_LIMIT 2047
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inline static void pxa_irda_fir_dma_rx_start(struct pxa_irda *si)
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{
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DCSR(si->rxdma) = DCSR_NODESC;
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DSADR(si->rxdma) = __PREG(ICDR);
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DTADR(si->rxdma) = si->dma_rx_buff_phy;
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DCMD(si->rxdma) = DCMD_INCTRGADDR | DCMD_FLOWSRC | DCMD_WIDTH1 | DCMD_BURST32 | IRDA_FRAME_SIZE_LIMIT;
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DCSR(si->rxdma) |= DCSR_RUN;
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}
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inline static void pxa_irda_fir_dma_tx_start(struct pxa_irda *si)
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{
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DCSR(si->txdma) = DCSR_NODESC;
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DSADR(si->txdma) = si->dma_tx_buff_phy;
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DTADR(si->txdma) = __PREG(ICDR);
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DCMD(si->txdma) = DCMD_INCSRCADDR | DCMD_FLOWTRG | DCMD_ENDIRQEN | DCMD_WIDTH1 | DCMD_BURST32 | si->dma_tx_buff_len;
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DCSR(si->txdma) |= DCSR_RUN;
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}
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/*
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* Set the IrDA communications speed.
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*/
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static int pxa_irda_set_speed(struct pxa_irda *si, int speed)
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{
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unsigned long flags;
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unsigned int divisor;
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switch (speed) {
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case 9600: case 19200: case 38400:
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case 57600: case 115200:
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/* refer to PXA250/210 Developer's Manual 10-7 */
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/* BaudRate = 14.7456 MHz / (16*Divisor) */
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divisor = 14745600 / (16 * speed);
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local_irq_save(flags);
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if (IS_FIR(si)) {
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/* stop RX DMA */
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DCSR(si->rxdma) &= ~DCSR_RUN;
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/* disable FICP */
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ICCR0 = 0;
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pxa_set_cken(CKEN13_FICP, 0);
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/* set board transceiver to SIR mode */
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si->pdata->transceiver_mode(si->dev, IR_SIRMODE);
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/* configure GPIO46/47 */
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pxa_gpio_mode(GPIO46_STRXD_MD);
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pxa_gpio_mode(GPIO47_STTXD_MD);
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/* enable the STUART clock */
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pxa_set_cken(CKEN5_STUART, 1);
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}
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/* disable STUART first */
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STIER = 0;
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/* access DLL & DLH */
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STLCR |= LCR_DLAB;
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STDLL = divisor & 0xff;
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STDLH = divisor >> 8;
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STLCR &= ~LCR_DLAB;
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si->speed = speed;
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STISR = IrSR_IR_RECEIVE_ON | IrSR_XMODE_PULSE_1_6;
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STIER = IER_UUE | IER_RLSE | IER_RAVIE | IER_RTIOE;
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local_irq_restore(flags);
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break;
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case 4000000:
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local_irq_save(flags);
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/* disable STUART */
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STIER = 0;
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STISR = 0;
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pxa_set_cken(CKEN5_STUART, 0);
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/* disable FICP first */
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ICCR0 = 0;
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/* set board transceiver to FIR mode */
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si->pdata->transceiver_mode(si->dev, IR_FIRMODE);
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/* configure GPIO46/47 */
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pxa_gpio_mode(GPIO46_ICPRXD_MD);
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pxa_gpio_mode(GPIO47_ICPTXD_MD);
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/* enable the FICP clock */
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pxa_set_cken(CKEN13_FICP, 1);
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si->speed = speed;
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pxa_irda_fir_dma_rx_start(si);
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ICCR0 = ICCR0_ITR | ICCR0_RXE;
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local_irq_restore(flags);
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break;
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default:
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return -EINVAL;
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}
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return 0;
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}
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/* SIR interrupt service routine. */
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static irqreturn_t pxa_irda_sir_irq(int irq, void *dev_id, struct pt_regs *regs)
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{
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struct net_device *dev = dev_id;
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struct pxa_irda *si = netdev_priv(dev);
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int iir, lsr, data;
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iir = STIIR;
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switch (iir & 0x0F) {
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case 0x06: /* Receiver Line Status */
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lsr = STLSR;
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while (lsr & LSR_FIFOE) {
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data = STRBR;
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if (lsr & (LSR_OE | LSR_PE | LSR_FE | LSR_BI)) {
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printk(KERN_DEBUG "pxa_ir: sir receiving error\n");
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si->stats.rx_errors++;
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if (lsr & LSR_FE)
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si->stats.rx_frame_errors++;
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if (lsr & LSR_OE)
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si->stats.rx_fifo_errors++;
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} else {
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si->stats.rx_bytes++;
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async_unwrap_char(dev, &si->stats, &si->rx_buff, data);
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}
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lsr = STLSR;
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}
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dev->last_rx = jiffies;
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si->last_oscr = OSCR;
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break;
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case 0x04: /* Received Data Available */
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/* forth through */
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case 0x0C: /* Character Timeout Indication */
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do {
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si->stats.rx_bytes++;
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async_unwrap_char(dev, &si->stats, &si->rx_buff, STRBR);
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} while (STLSR & LSR_DR);
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dev->last_rx = jiffies;
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si->last_oscr = OSCR;
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break;
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case 0x02: /* Transmit FIFO Data Request */
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while ((si->tx_buff.len) && (STLSR & LSR_TDRQ)) {
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STTHR = *si->tx_buff.data++;
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si->tx_buff.len -= 1;
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}
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if (si->tx_buff.len == 0) {
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si->stats.tx_packets++;
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si->stats.tx_bytes += si->tx_buff.data -
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si->tx_buff.head;
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/* We need to ensure that the transmitter has finished. */
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while ((STLSR & LSR_TEMT) == 0)
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cpu_relax();
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si->last_oscr = OSCR;
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/*
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* Ok, we've finished transmitting. Now enable
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* the receiver. Sometimes we get a receive IRQ
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* immediately after a transmit...
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*/
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if (si->newspeed) {
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pxa_irda_set_speed(si, si->newspeed);
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si->newspeed = 0;
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} else {
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/* enable IR Receiver, disable IR Transmitter */
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STISR = IrSR_IR_RECEIVE_ON | IrSR_XMODE_PULSE_1_6;
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/* enable STUART and receive interrupts */
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STIER = IER_UUE | IER_RLSE | IER_RAVIE | IER_RTIOE;
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}
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/* I'm hungry! */
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netif_wake_queue(dev);
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}
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break;
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}
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return IRQ_HANDLED;
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}
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/* FIR Receive DMA interrupt handler */
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static void pxa_irda_fir_dma_rx_irq(int channel, void *data, struct pt_regs *regs)
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{
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int dcsr = DCSR(channel);
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|
||||
DCSR(channel) = dcsr & ~DCSR_RUN;
|
||||
|
||||
printk(KERN_DEBUG "pxa_ir: fir rx dma bus error %#x\n", dcsr);
|
||||
}
|
||||
|
||||
/* FIR Transmit DMA interrupt handler */
|
||||
static void pxa_irda_fir_dma_tx_irq(int channel, void *data, struct pt_regs *regs)
|
||||
{
|
||||
struct net_device *dev = data;
|
||||
struct pxa_irda *si = netdev_priv(dev);
|
||||
int dcsr;
|
||||
|
||||
dcsr = DCSR(channel);
|
||||
DCSR(channel) = dcsr & ~DCSR_RUN;
|
||||
|
||||
if (dcsr & DCSR_ENDINTR) {
|
||||
si->stats.tx_packets++;
|
||||
si->stats.tx_bytes += si->dma_tx_buff_len;
|
||||
} else {
|
||||
si->stats.tx_errors++;
|
||||
}
|
||||
|
||||
while (ICSR1 & ICSR1_TBY)
|
||||
cpu_relax();
|
||||
si->last_oscr = OSCR;
|
||||
|
||||
/*
|
||||
* HACK: It looks like the TBY bit is dropped too soon.
|
||||
* Without this delay things break.
|
||||
*/
|
||||
udelay(120);
|
||||
|
||||
if (si->newspeed) {
|
||||
pxa_irda_set_speed(si, si->newspeed);
|
||||
si->newspeed = 0;
|
||||
} else {
|
||||
ICCR0 = 0;
|
||||
pxa_irda_fir_dma_rx_start(si);
|
||||
ICCR0 = ICCR0_ITR | ICCR0_RXE;
|
||||
}
|
||||
netif_wake_queue(dev);
|
||||
}
|
||||
|
||||
/* EIF(Error in FIFO/End in Frame) handler for FIR */
|
||||
static void pxa_irda_fir_irq_eif(struct pxa_irda *si, struct net_device *dev)
|
||||
{
|
||||
unsigned int len, stat, data;
|
||||
|
||||
/* Get the current data position. */
|
||||
len = DTADR(si->rxdma) - si->dma_rx_buff_phy;
|
||||
|
||||
do {
|
||||
/* Read Status, and then Data. */
|
||||
stat = ICSR1;
|
||||
rmb();
|
||||
data = ICDR;
|
||||
|
||||
if (stat & (ICSR1_CRE | ICSR1_ROR)) {
|
||||
si->stats.rx_errors++;
|
||||
if (stat & ICSR1_CRE) {
|
||||
printk(KERN_DEBUG "pxa_ir: fir receive CRC error\n");
|
||||
si->stats.rx_crc_errors++;
|
||||
}
|
||||
if (stat & ICSR1_ROR) {
|
||||
printk(KERN_DEBUG "pxa_ir: fir receive overrun\n");
|
||||
si->stats.rx_frame_errors++;
|
||||
}
|
||||
} else {
|
||||
si->dma_rx_buff[len++] = data;
|
||||
}
|
||||
/* If we hit the end of frame, there's no point in continuing. */
|
||||
if (stat & ICSR1_EOF)
|
||||
break;
|
||||
} while (ICSR0 & ICSR0_EIF);
|
||||
|
||||
if (stat & ICSR1_EOF) {
|
||||
/* end of frame. */
|
||||
struct sk_buff *skb = alloc_skb(len+1,GFP_ATOMIC);
|
||||
if (!skb) {
|
||||
printk(KERN_ERR "pxa_ir: fir out of memory for receive skb\n");
|
||||
si->stats.rx_dropped++;
|
||||
return;
|
||||
}
|
||||
|
||||
/* Align IP header to 20 bytes */
|
||||
skb_reserve(skb, 1);
|
||||
memcpy(skb->data, si->dma_rx_buff, len);
|
||||
skb_put(skb, len);
|
||||
|
||||
/* Feed it to IrLAP */
|
||||
skb->dev = dev;
|
||||
skb->mac.raw = skb->data;
|
||||
skb->protocol = htons(ETH_P_IRDA);
|
||||
netif_rx(skb);
|
||||
|
||||
si->stats.rx_packets++;
|
||||
si->stats.rx_bytes += len;
|
||||
|
||||
dev->last_rx = jiffies;
|
||||
}
|
||||
}
|
||||
|
||||
/* FIR interrupt handler */
|
||||
static irqreturn_t pxa_irda_fir_irq(int irq, void *dev_id, struct pt_regs *regs)
|
||||
{
|
||||
struct net_device *dev = dev_id;
|
||||
struct pxa_irda *si = netdev_priv(dev);
|
||||
int icsr0;
|
||||
|
||||
/* stop RX DMA */
|
||||
DCSR(si->rxdma) &= ~DCSR_RUN;
|
||||
si->last_oscr = OSCR;
|
||||
icsr0 = ICSR0;
|
||||
|
||||
if (icsr0 & (ICSR0_FRE | ICSR0_RAB)) {
|
||||
if (icsr0 & ICSR0_FRE) {
|
||||
printk(KERN_DEBUG "pxa_ir: fir receive frame error\n");
|
||||
si->stats.rx_frame_errors++;
|
||||
} else {
|
||||
printk(KERN_DEBUG "pxa_ir: fir receive abort\n");
|
||||
si->stats.rx_errors++;
|
||||
}
|
||||
ICSR0 = icsr0 & (ICSR0_FRE | ICSR0_RAB);
|
||||
}
|
||||
|
||||
if (icsr0 & ICSR0_EIF) {
|
||||
/* An error in FIFO occured, or there is a end of frame */
|
||||
pxa_irda_fir_irq_eif(si, dev);
|
||||
}
|
||||
|
||||
ICCR0 = 0;
|
||||
pxa_irda_fir_dma_rx_start(si);
|
||||
ICCR0 = ICCR0_ITR | ICCR0_RXE;
|
||||
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
/* hard_xmit interface of irda device */
|
||||
static int pxa_irda_hard_xmit(struct sk_buff *skb, struct net_device *dev)
|
||||
{
|
||||
struct pxa_irda *si = netdev_priv(dev);
|
||||
int speed = irda_get_next_speed(skb);
|
||||
|
||||
/*
|
||||
* Does this packet contain a request to change the interface
|
||||
* speed? If so, remember it until we complete the transmission
|
||||
* of this frame.
|
||||
*/
|
||||
if (speed != si->speed && speed != -1)
|
||||
si->newspeed = speed;
|
||||
|
||||
/*
|
||||
* If this is an empty frame, we can bypass a lot.
|
||||
*/
|
||||
if (skb->len == 0) {
|
||||
if (si->newspeed) {
|
||||
si->newspeed = 0;
|
||||
pxa_irda_set_speed(si, speed);
|
||||
}
|
||||
dev_kfree_skb(skb);
|
||||
return 0;
|
||||
}
|
||||
|
||||
netif_stop_queue(dev);
|
||||
|
||||
if (!IS_FIR(si)) {
|
||||
si->tx_buff.data = si->tx_buff.head;
|
||||
si->tx_buff.len = async_wrap_skb(skb, si->tx_buff.data, si->tx_buff.truesize);
|
||||
|
||||
/* Disable STUART interrupts and switch to transmit mode. */
|
||||
STIER = 0;
|
||||
STISR = IrSR_IR_TRANSMIT_ON | IrSR_XMODE_PULSE_1_6;
|
||||
|
||||
/* enable STUART and transmit interrupts */
|
||||
STIER = IER_UUE | IER_TIE;
|
||||
} else {
|
||||
unsigned long mtt = irda_get_mtt(skb);
|
||||
|
||||
si->dma_tx_buff_len = skb->len;
|
||||
memcpy(si->dma_tx_buff, skb->data, skb->len);
|
||||
|
||||
if (mtt)
|
||||
while ((unsigned)(OSCR - si->last_oscr)/4 < mtt)
|
||||
cpu_relax();
|
||||
|
||||
/* stop RX DMA, disable FICP */
|
||||
DCSR(si->rxdma) &= ~DCSR_RUN;
|
||||
ICCR0 = 0;
|
||||
|
||||
pxa_irda_fir_dma_tx_start(si);
|
||||
ICCR0 = ICCR0_ITR | ICCR0_TXE;
|
||||
}
|
||||
|
||||
dev_kfree_skb(skb);
|
||||
dev->trans_start = jiffies;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int pxa_irda_ioctl(struct net_device *dev, struct ifreq *ifreq, int cmd)
|
||||
{
|
||||
struct if_irda_req *rq = (struct if_irda_req *)ifreq;
|
||||
struct pxa_irda *si = netdev_priv(dev);
|
||||
int ret;
|
||||
|
||||
switch (cmd) {
|
||||
case SIOCSBANDWIDTH:
|
||||
ret = -EPERM;
|
||||
if (capable(CAP_NET_ADMIN)) {
|
||||
/*
|
||||
* We are unable to set the speed if the
|
||||
* device is not running.
|
||||
*/
|
||||
if (netif_running(dev)) {
|
||||
ret = pxa_irda_set_speed(si,
|
||||
rq->ifr_baudrate);
|
||||
} else {
|
||||
printk(KERN_INFO "pxa_ir: SIOCSBANDWIDTH: !netif_running\n");
|
||||
ret = 0;
|
||||
}
|
||||
}
|
||||
break;
|
||||
|
||||
case SIOCSMEDIABUSY:
|
||||
ret = -EPERM;
|
||||
if (capable(CAP_NET_ADMIN)) {
|
||||
irda_device_set_media_busy(dev, TRUE);
|
||||
ret = 0;
|
||||
}
|
||||
break;
|
||||
|
||||
case SIOCGRECEIVING:
|
||||
ret = 0;
|
||||
rq->ifr_receiving = IS_FIR(si) ? 0
|
||||
: si->rx_buff.state != OUTSIDE_FRAME;
|
||||
break;
|
||||
|
||||
default:
|
||||
ret = -EOPNOTSUPP;
|
||||
break;
|
||||
}
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static struct net_device_stats *pxa_irda_stats(struct net_device *dev)
|
||||
{
|
||||
struct pxa_irda *si = netdev_priv(dev);
|
||||
return &si->stats;
|
||||
}
|
||||
|
||||
static void pxa_irda_startup(struct pxa_irda *si)
|
||||
{
|
||||
/* Disable STUART interrupts */
|
||||
STIER = 0;
|
||||
/* enable STUART interrupt to the processor */
|
||||
STMCR = MCR_OUT2;
|
||||
/* configure SIR frame format: StartBit - Data 7 ... Data 0 - Stop Bit */
|
||||
STLCR = LCR_WLS0 | LCR_WLS1;
|
||||
/* enable FIFO, we use FIFO to improve performance */
|
||||
STFCR = FCR_TRFIFOE | FCR_ITL_32;
|
||||
|
||||
/* disable FICP */
|
||||
ICCR0 = 0;
|
||||
/* configure FICP ICCR2 */
|
||||
ICCR2 = ICCR2_TXP | ICCR2_TRIG_32;
|
||||
|
||||
/* configure DMAC */
|
||||
DRCMR17 = si->rxdma | DRCMR_MAPVLD;
|
||||
DRCMR18 = si->txdma | DRCMR_MAPVLD;
|
||||
|
||||
/* force SIR reinitialization */
|
||||
si->speed = 4000000;
|
||||
pxa_irda_set_speed(si, 9600);
|
||||
|
||||
printk(KERN_DEBUG "pxa_ir: irda startup\n");
|
||||
}
|
||||
|
||||
static void pxa_irda_shutdown(struct pxa_irda *si)
|
||||
{
|
||||
unsigned long flags;
|
||||
|
||||
local_irq_save(flags);
|
||||
|
||||
/* disable STUART and interrupt */
|
||||
STIER = 0;
|
||||
/* disable STUART SIR mode */
|
||||
STISR = 0;
|
||||
/* disable the STUART clock */
|
||||
pxa_set_cken(CKEN5_STUART, 0);
|
||||
|
||||
/* disable DMA */
|
||||
DCSR(si->txdma) &= ~DCSR_RUN;
|
||||
DCSR(si->rxdma) &= ~DCSR_RUN;
|
||||
/* disable FICP */
|
||||
ICCR0 = 0;
|
||||
/* disable the FICP clock */
|
||||
pxa_set_cken(CKEN13_FICP, 0);
|
||||
|
||||
DRCMR17 = 0;
|
||||
DRCMR18 = 0;
|
||||
|
||||
local_irq_restore(flags);
|
||||
|
||||
/* power off board transceiver */
|
||||
si->pdata->transceiver_mode(si->dev, IR_OFF);
|
||||
|
||||
printk(KERN_DEBUG "pxa_ir: irda shutdown\n");
|
||||
}
|
||||
|
||||
static int pxa_irda_start(struct net_device *dev)
|
||||
{
|
||||
struct pxa_irda *si = netdev_priv(dev);
|
||||
int err;
|
||||
|
||||
si->speed = 9600;
|
||||
|
||||
err = request_irq(IRQ_STUART, pxa_irda_sir_irq, 0, dev->name, dev);
|
||||
if (err)
|
||||
goto err_irq1;
|
||||
|
||||
err = request_irq(IRQ_ICP, pxa_irda_fir_irq, 0, dev->name, dev);
|
||||
if (err)
|
||||
goto err_irq2;
|
||||
|
||||
/*
|
||||
* The interrupt must remain disabled for now.
|
||||
*/
|
||||
disable_irq(IRQ_STUART);
|
||||
disable_irq(IRQ_ICP);
|
||||
|
||||
err = -EBUSY;
|
||||
si->rxdma = pxa_request_dma("FICP_RX",DMA_PRIO_LOW, pxa_irda_fir_dma_rx_irq, dev);
|
||||
if (si->rxdma < 0)
|
||||
goto err_rx_dma;
|
||||
|
||||
si->txdma = pxa_request_dma("FICP_TX",DMA_PRIO_LOW, pxa_irda_fir_dma_tx_irq, dev);
|
||||
if (si->txdma < 0)
|
||||
goto err_tx_dma;
|
||||
|
||||
err = -ENOMEM;
|
||||
si->dma_rx_buff = dma_alloc_coherent(si->dev, IRDA_FRAME_SIZE_LIMIT,
|
||||
&si->dma_rx_buff_phy, GFP_KERNEL );
|
||||
if (!si->dma_rx_buff)
|
||||
goto err_dma_rx_buff;
|
||||
|
||||
si->dma_tx_buff = dma_alloc_coherent(si->dev, IRDA_FRAME_SIZE_LIMIT,
|
||||
&si->dma_tx_buff_phy, GFP_KERNEL );
|
||||
if (!si->dma_tx_buff)
|
||||
goto err_dma_tx_buff;
|
||||
|
||||
/* Setup the serial port for the initial speed. */
|
||||
pxa_irda_startup(si);
|
||||
|
||||
/*
|
||||
* Open a new IrLAP layer instance.
|
||||
*/
|
||||
si->irlap = irlap_open(dev, &si->qos, "pxa");
|
||||
err = -ENOMEM;
|
||||
if (!si->irlap)
|
||||
goto err_irlap;
|
||||
|
||||
/*
|
||||
* Now enable the interrupt and start the queue
|
||||
*/
|
||||
enable_irq(IRQ_STUART);
|
||||
enable_irq(IRQ_ICP);
|
||||
netif_start_queue(dev);
|
||||
|
||||
printk(KERN_DEBUG "pxa_ir: irda driver opened\n");
|
||||
|
||||
return 0;
|
||||
|
||||
err_irlap:
|
||||
pxa_irda_shutdown(si);
|
||||
dma_free_coherent(si->dev, IRDA_FRAME_SIZE_LIMIT, si->dma_tx_buff, si->dma_tx_buff_phy);
|
||||
err_dma_tx_buff:
|
||||
dma_free_coherent(si->dev, IRDA_FRAME_SIZE_LIMIT, si->dma_rx_buff, si->dma_rx_buff_phy);
|
||||
err_dma_rx_buff:
|
||||
pxa_free_dma(si->txdma);
|
||||
err_tx_dma:
|
||||
pxa_free_dma(si->rxdma);
|
||||
err_rx_dma:
|
||||
free_irq(IRQ_ICP, dev);
|
||||
err_irq2:
|
||||
free_irq(IRQ_STUART, dev);
|
||||
err_irq1:
|
||||
|
||||
return err;
|
||||
}
|
||||
|
||||
static int pxa_irda_stop(struct net_device *dev)
|
||||
{
|
||||
struct pxa_irda *si = netdev_priv(dev);
|
||||
|
||||
netif_stop_queue(dev);
|
||||
|
||||
pxa_irda_shutdown(si);
|
||||
|
||||
/* Stop IrLAP */
|
||||
if (si->irlap) {
|
||||
irlap_close(si->irlap);
|
||||
si->irlap = NULL;
|
||||
}
|
||||
|
||||
free_irq(IRQ_STUART, dev);
|
||||
free_irq(IRQ_ICP, dev);
|
||||
|
||||
pxa_free_dma(si->rxdma);
|
||||
pxa_free_dma(si->txdma);
|
||||
|
||||
if (si->dma_rx_buff)
|
||||
dma_free_coherent(si->dev, IRDA_FRAME_SIZE_LIMIT, si->dma_tx_buff, si->dma_tx_buff_phy);
|
||||
if (si->dma_tx_buff)
|
||||
dma_free_coherent(si->dev, IRDA_FRAME_SIZE_LIMIT, si->dma_rx_buff, si->dma_rx_buff_phy);
|
||||
|
||||
printk(KERN_DEBUG "pxa_ir: irda driver closed\n");
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int pxa_irda_suspend(struct device *_dev, pm_message_t state, u32 level)
|
||||
{
|
||||
struct net_device *dev = dev_get_drvdata(_dev);
|
||||
struct pxa_irda *si;
|
||||
|
||||
if (!dev || level != SUSPEND_DISABLE)
|
||||
return 0;
|
||||
|
||||
if (netif_running(dev)) {
|
||||
si = netdev_priv(dev);
|
||||
netif_device_detach(dev);
|
||||
pxa_irda_shutdown(si);
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int pxa_irda_resume(struct device *_dev, u32 level)
|
||||
{
|
||||
struct net_device *dev = dev_get_drvdata(_dev);
|
||||
struct pxa_irda *si;
|
||||
|
||||
if (!dev || level != RESUME_ENABLE)
|
||||
return 0;
|
||||
|
||||
if (netif_running(dev)) {
|
||||
si = netdev_priv(dev);
|
||||
pxa_irda_startup(si);
|
||||
netif_device_attach(dev);
|
||||
netif_wake_queue(dev);
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
static int pxa_irda_init_iobuf(iobuff_t *io, int size)
|
||||
{
|
||||
io->head = kmalloc(size, GFP_KERNEL | GFP_DMA);
|
||||
if (io->head != NULL) {
|
||||
io->truesize = size;
|
||||
io->in_frame = FALSE;
|
||||
io->state = OUTSIDE_FRAME;
|
||||
io->data = io->head;
|
||||
}
|
||||
return io->head ? 0 : -ENOMEM;
|
||||
}
|
||||
|
||||
static int pxa_irda_probe(struct device *_dev)
|
||||
{
|
||||
struct platform_device *pdev = to_platform_device(_dev);
|
||||
struct net_device *dev;
|
||||
struct pxa_irda *si;
|
||||
unsigned int baudrate_mask;
|
||||
int err;
|
||||
|
||||
if (!pdev->dev.platform_data)
|
||||
return -ENODEV;
|
||||
|
||||
err = request_mem_region(__PREG(STUART), 0x24, "IrDA") ? 0 : -EBUSY;
|
||||
if (err)
|
||||
goto err_mem_1;
|
||||
|
||||
err = request_mem_region(__PREG(FICP), 0x1c, "IrDA") ? 0 : -EBUSY;
|
||||
if (err)
|
||||
goto err_mem_2;
|
||||
|
||||
dev = alloc_irdadev(sizeof(struct pxa_irda));
|
||||
if (!dev)
|
||||
goto err_mem_3;
|
||||
|
||||
si = netdev_priv(dev);
|
||||
si->dev = &pdev->dev;
|
||||
si->pdata = pdev->dev.platform_data;
|
||||
|
||||
/*
|
||||
* Initialise the SIR buffers
|
||||
*/
|
||||
err = pxa_irda_init_iobuf(&si->rx_buff, 14384);
|
||||
if (err)
|
||||
goto err_mem_4;
|
||||
err = pxa_irda_init_iobuf(&si->tx_buff, 4000);
|
||||
if (err)
|
||||
goto err_mem_5;
|
||||
|
||||
dev->hard_start_xmit = pxa_irda_hard_xmit;
|
||||
dev->open = pxa_irda_start;
|
||||
dev->stop = pxa_irda_stop;
|
||||
dev->do_ioctl = pxa_irda_ioctl;
|
||||
dev->get_stats = pxa_irda_stats;
|
||||
|
||||
irda_init_max_qos_capabilies(&si->qos);
|
||||
|
||||
baudrate_mask = 0;
|
||||
if (si->pdata->transceiver_cap & IR_SIRMODE)
|
||||
baudrate_mask |= IR_9600|IR_19200|IR_38400|IR_57600|IR_115200;
|
||||
if (si->pdata->transceiver_cap & IR_FIRMODE)
|
||||
baudrate_mask |= IR_4000000 << 8;
|
||||
|
||||
si->qos.baud_rate.bits &= baudrate_mask;
|
||||
si->qos.min_turn_time.bits = 7; /* 1ms or more */
|
||||
|
||||
irda_qos_bits_to_value(&si->qos);
|
||||
|
||||
err = register_netdev(dev);
|
||||
|
||||
if (err == 0)
|
||||
dev_set_drvdata(&pdev->dev, dev);
|
||||
|
||||
if (err) {
|
||||
kfree(si->tx_buff.head);
|
||||
err_mem_5:
|
||||
kfree(si->rx_buff.head);
|
||||
err_mem_4:
|
||||
free_netdev(dev);
|
||||
err_mem_3:
|
||||
release_mem_region(__PREG(FICP), 0x1c);
|
||||
err_mem_2:
|
||||
release_mem_region(__PREG(STUART), 0x24);
|
||||
}
|
||||
err_mem_1:
|
||||
return err;
|
||||
}
|
||||
|
||||
static int pxa_irda_remove(struct device *_dev)
|
||||
{
|
||||
struct net_device *dev = dev_get_drvdata(_dev);
|
||||
|
||||
if (dev) {
|
||||
struct pxa_irda *si = netdev_priv(dev);
|
||||
unregister_netdev(dev);
|
||||
kfree(si->tx_buff.head);
|
||||
kfree(si->rx_buff.head);
|
||||
free_netdev(dev);
|
||||
}
|
||||
|
||||
release_mem_region(__PREG(STUART), 0x24);
|
||||
release_mem_region(__PREG(FICP), 0x1c);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct device_driver pxa_ir_driver = {
|
||||
.name = "pxa2xx-ir",
|
||||
.bus = &platform_bus_type,
|
||||
.probe = pxa_irda_probe,
|
||||
.remove = pxa_irda_remove,
|
||||
.suspend = pxa_irda_suspend,
|
||||
.resume = pxa_irda_resume,
|
||||
};
|
||||
|
||||
static int __init pxa_irda_init(void)
|
||||
{
|
||||
return driver_register(&pxa_ir_driver);
|
||||
}
|
||||
|
||||
static void __exit pxa_irda_exit(void)
|
||||
{
|
||||
driver_unregister(&pxa_ir_driver);
|
||||
}
|
||||
|
||||
module_init(pxa_irda_init);
|
||||
module_exit(pxa_irda_exit);
|
||||
|
||||
MODULE_LICENSE("GPL");
|
||||
17
include/asm-arm/arch-pxa/irda.h
Normal file
17
include/asm-arm/arch-pxa/irda.h
Normal file
|
|
@ -0,0 +1,17 @@
|
|||
#ifndef ASMARM_ARCH_IRDA_H
|
||||
#define ASMARM_ARCH_IRDA_H
|
||||
|
||||
/* board specific transceiver capabilities */
|
||||
|
||||
#define IR_OFF 1
|
||||
#define IR_SIRMODE 2
|
||||
#define IR_FIRMODE 4
|
||||
|
||||
struct pxaficp_platform_data {
|
||||
int transceiver_cap;
|
||||
void (*transceiver_mode)(struct device *dev, int mode);
|
||||
};
|
||||
|
||||
extern void pxa_set_ficp_info(struct pxaficp_platform_data *info);
|
||||
|
||||
#endif
|
||||
|
|
@ -1032,14 +1032,12 @@
|
|||
#define ICCR0_LBM (1 << 1) /* Loopback mode */
|
||||
#define ICCR0_ITR (1 << 0) /* IrDA transmission */
|
||||
|
||||
#ifdef CONFIG_PXA27x
|
||||
#define ICCR2_RXP (1 << 3) /* Receive Pin Polarity select */
|
||||
#define ICCR2_TXP (1 << 2) /* Transmit Pin Polarity select */
|
||||
#define ICCR2_TRIG (3 << 0) /* Receive FIFO Trigger threshold */
|
||||
#define ICCR2_TRIG_8 (0 << 0) /* >= 8 bytes */
|
||||
#define ICCR2_TRIG_16 (1 << 0) /* >= 16 bytes */
|
||||
#define ICCR2_TRIG_32 (2 << 0) /* >= 32 bytes */
|
||||
#endif
|
||||
|
||||
#ifdef CONFIG_PXA27x
|
||||
#define ICSR0_EOC (1 << 6) /* DMA End of Descriptor Chain */
|
||||
|
|
|
|||
Loading…
Reference in a new issue