--- /dev/null
+/*
+ * Driver for Nuvoton Technology Corporation w83667hg/w83677hg-i CIR
+ *
+ * Copyright (C) 2010 Jarod Wilson <jarod@redhat.com>
+ * Copyright (C) 2009 Nuvoton PS Team
+ *
+ * Special thanks to Nuvoton for providing hardware, spec sheets and
+ * sample code upon which portions of this driver are based. Indirect
+ * thanks also to Maxim Levitsky, whose ene_ir driver this driver is
+ * modeled after.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+ * USA
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/pnp.h>
+#include <linux/io.h>
+#include <linux/interrupt.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <media/rc-core.h>
+#include <linux/pci_ids.h>
+
+#include "nuvoton-cir.h"
+
+/* write val to config reg */
+static inline void nvt_cr_write(struct nvt_dev *nvt, u8 val, u8 reg)
+{
+ outb(reg, nvt->cr_efir);
+ outb(val, nvt->cr_efdr);
+}
+
+/* read val from config reg */
+static inline u8 nvt_cr_read(struct nvt_dev *nvt, u8 reg)
+{
+ outb(reg, nvt->cr_efir);
+ return inb(nvt->cr_efdr);
+}
+
+/* update config register bit without changing other bits */
+static inline void nvt_set_reg_bit(struct nvt_dev *nvt, u8 val, u8 reg)
+{
+ u8 tmp = nvt_cr_read(nvt, reg) | val;
+ nvt_cr_write(nvt, tmp, reg);
+}
+
+/* clear config register bit without changing other bits */
+static inline void nvt_clear_reg_bit(struct nvt_dev *nvt, u8 val, u8 reg)
+{
+ u8 tmp = nvt_cr_read(nvt, reg) & ~val;
+ nvt_cr_write(nvt, tmp, reg);
+}
+
+/* enter extended function mode */
+static inline void nvt_efm_enable(struct nvt_dev *nvt)
+{
+ /* Enabling Extended Function Mode explicitly requires writing 2x */
+ outb(EFER_EFM_ENABLE, nvt->cr_efir);
+ outb(EFER_EFM_ENABLE, nvt->cr_efir);
+}
+
+/* exit extended function mode */
+static inline void nvt_efm_disable(struct nvt_dev *nvt)
+{
+ outb(EFER_EFM_DISABLE, nvt->cr_efir);
+}
+
+/*
+ * When you want to address a specific logical device, write its logical
+ * device number to CR_LOGICAL_DEV_SEL, then enable/disable by writing
+ * 0x1/0x0 respectively to CR_LOGICAL_DEV_EN.
+ */
+static inline void nvt_select_logical_dev(struct nvt_dev *nvt, u8 ldev)
+{
+ outb(CR_LOGICAL_DEV_SEL, nvt->cr_efir);
+ outb(ldev, nvt->cr_efdr);
+}
+
+/* write val to cir config register */
+static inline void nvt_cir_reg_write(struct nvt_dev *nvt, u8 val, u8 offset)
+{
+ outb(val, nvt->cir_addr + offset);
+}
+
+/* read val from cir config register */
+static u8 nvt_cir_reg_read(struct nvt_dev *nvt, u8 offset)
+{
+ u8 val;
+
+ val = inb(nvt->cir_addr + offset);
+
+ return val;
+}
+
+/* write val to cir wake register */
+static inline void nvt_cir_wake_reg_write(struct nvt_dev *nvt,
+ u8 val, u8 offset)
+{
+ outb(val, nvt->cir_wake_addr + offset);
+}
+
+/* read val from cir wake config register */
+static u8 nvt_cir_wake_reg_read(struct nvt_dev *nvt, u8 offset)
+{
+ u8 val;
+
+ val = inb(nvt->cir_wake_addr + offset);
+
+ return val;
+}
+
+/* dump current cir register contents */
+static void cir_dump_regs(struct nvt_dev *nvt)
+{
+ nvt_efm_enable(nvt);
+ nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR);
+
+ pr_info("%s: Dump CIR logical device registers:\n", NVT_DRIVER_NAME);
+ pr_info(" * CR CIR ACTIVE : 0x%x\n",
+ nvt_cr_read(nvt, CR_LOGICAL_DEV_EN));
+ pr_info(" * CR CIR BASE ADDR: 0x%x\n",
+ (nvt_cr_read(nvt, CR_CIR_BASE_ADDR_HI) << 8) |
+ nvt_cr_read(nvt, CR_CIR_BASE_ADDR_LO));
+ pr_info(" * CR CIR IRQ NUM: 0x%x\n",
+ nvt_cr_read(nvt, CR_CIR_IRQ_RSRC));
+
+ nvt_efm_disable(nvt);
+
+ pr_info("%s: Dump CIR registers:\n", NVT_DRIVER_NAME);
+ pr_info(" * IRCON: 0x%x\n", nvt_cir_reg_read(nvt, CIR_IRCON));
+ pr_info(" * IRSTS: 0x%x\n", nvt_cir_reg_read(nvt, CIR_IRSTS));
+ pr_info(" * IREN: 0x%x\n", nvt_cir_reg_read(nvt, CIR_IREN));
+ pr_info(" * RXFCONT: 0x%x\n", nvt_cir_reg_read(nvt, CIR_RXFCONT));
+ pr_info(" * CP: 0x%x\n", nvt_cir_reg_read(nvt, CIR_CP));
+ pr_info(" * CC: 0x%x\n", nvt_cir_reg_read(nvt, CIR_CC));
+ pr_info(" * SLCH: 0x%x\n", nvt_cir_reg_read(nvt, CIR_SLCH));
+ pr_info(" * SLCL: 0x%x\n", nvt_cir_reg_read(nvt, CIR_SLCL));
+ pr_info(" * FIFOCON: 0x%x\n", nvt_cir_reg_read(nvt, CIR_FIFOCON));
+ pr_info(" * IRFIFOSTS: 0x%x\n", nvt_cir_reg_read(nvt, CIR_IRFIFOSTS));
+ pr_info(" * SRXFIFO: 0x%x\n", nvt_cir_reg_read(nvt, CIR_SRXFIFO));
+ pr_info(" * TXFCONT: 0x%x\n", nvt_cir_reg_read(nvt, CIR_TXFCONT));
+ pr_info(" * STXFIFO: 0x%x\n", nvt_cir_reg_read(nvt, CIR_STXFIFO));
+ pr_info(" * FCCH: 0x%x\n", nvt_cir_reg_read(nvt, CIR_FCCH));
+ pr_info(" * FCCL: 0x%x\n", nvt_cir_reg_read(nvt, CIR_FCCL));
+ pr_info(" * IRFSM: 0x%x\n", nvt_cir_reg_read(nvt, CIR_IRFSM));
+}
+
+/* dump current cir wake register contents */
+static void cir_wake_dump_regs(struct nvt_dev *nvt)
+{
+ u8 i, fifo_len;
+
+ nvt_efm_enable(nvt);
+ nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR_WAKE);
+
+ pr_info("%s: Dump CIR WAKE logical device registers:\n",
+ NVT_DRIVER_NAME);
+ pr_info(" * CR CIR WAKE ACTIVE : 0x%x\n",
+ nvt_cr_read(nvt, CR_LOGICAL_DEV_EN));
+ pr_info(" * CR CIR WAKE BASE ADDR: 0x%x\n",
+ (nvt_cr_read(nvt, CR_CIR_BASE_ADDR_HI) << 8) |
+ nvt_cr_read(nvt, CR_CIR_BASE_ADDR_LO));
+ pr_info(" * CR CIR WAKE IRQ NUM: 0x%x\n",
+ nvt_cr_read(nvt, CR_CIR_IRQ_RSRC));
+
+ nvt_efm_disable(nvt);
+
+ pr_info("%s: Dump CIR WAKE registers\n", NVT_DRIVER_NAME);
+ pr_info(" * IRCON: 0x%x\n",
+ nvt_cir_wake_reg_read(nvt, CIR_WAKE_IRCON));
+ pr_info(" * IRSTS: 0x%x\n",
+ nvt_cir_wake_reg_read(nvt, CIR_WAKE_IRSTS));
+ pr_info(" * IREN: 0x%x\n",
+ nvt_cir_wake_reg_read(nvt, CIR_WAKE_IREN));
+ pr_info(" * FIFO CMP DEEP: 0x%x\n",
+ nvt_cir_wake_reg_read(nvt, CIR_WAKE_FIFO_CMP_DEEP));
+ pr_info(" * FIFO CMP TOL: 0x%x\n",
+ nvt_cir_wake_reg_read(nvt, CIR_WAKE_FIFO_CMP_TOL));
+ pr_info(" * FIFO COUNT: 0x%x\n",
+ nvt_cir_wake_reg_read(nvt, CIR_WAKE_FIFO_COUNT));
+ pr_info(" * SLCH: 0x%x\n",
+ nvt_cir_wake_reg_read(nvt, CIR_WAKE_SLCH));
+ pr_info(" * SLCL: 0x%x\n",
+ nvt_cir_wake_reg_read(nvt, CIR_WAKE_SLCL));
+ pr_info(" * FIFOCON: 0x%x\n",
+ nvt_cir_wake_reg_read(nvt, CIR_WAKE_FIFOCON));
+ pr_info(" * SRXFSTS: 0x%x\n",
+ nvt_cir_wake_reg_read(nvt, CIR_WAKE_SRXFSTS));
+ pr_info(" * SAMPLE RX FIFO: 0x%x\n",
+ nvt_cir_wake_reg_read(nvt, CIR_WAKE_SAMPLE_RX_FIFO));
+ pr_info(" * WR FIFO DATA: 0x%x\n",
+ nvt_cir_wake_reg_read(nvt, CIR_WAKE_WR_FIFO_DATA));
+ pr_info(" * RD FIFO ONLY: 0x%x\n",
+ nvt_cir_wake_reg_read(nvt, CIR_WAKE_RD_FIFO_ONLY));
+ pr_info(" * RD FIFO ONLY IDX: 0x%x\n",
+ nvt_cir_wake_reg_read(nvt, CIR_WAKE_RD_FIFO_ONLY_IDX));
+ pr_info(" * FIFO IGNORE: 0x%x\n",
+ nvt_cir_wake_reg_read(nvt, CIR_WAKE_FIFO_IGNORE));
+ pr_info(" * IRFSM: 0x%x\n",
+ nvt_cir_wake_reg_read(nvt, CIR_WAKE_IRFSM));
+
+ fifo_len = nvt_cir_wake_reg_read(nvt, CIR_WAKE_FIFO_COUNT);
+ pr_info("%s: Dump CIR WAKE FIFO (len %d)\n", NVT_DRIVER_NAME, fifo_len);
+ pr_info("* Contents =");
+ for (i = 0; i < fifo_len; i++)
+ pr_cont(" %02x",
+ nvt_cir_wake_reg_read(nvt, CIR_WAKE_RD_FIFO_ONLY));
+ pr_cont("\n");
+}
+
+/* detect hardware features */
+static int nvt_hw_detect(struct nvt_dev *nvt)
+{
+ unsigned long flags;
+ u8 chip_major, chip_minor;
+ char chip_id[12];
+ bool chip_unknown = false;
+
+ nvt_efm_enable(nvt);
+
+ /* Check if we're wired for the alternate EFER setup */
+ chip_major = nvt_cr_read(nvt, CR_CHIP_ID_HI);
+ if (chip_major == 0xff) {
+ nvt->cr_efir = CR_EFIR2;
+ nvt->cr_efdr = CR_EFDR2;
+ nvt_efm_enable(nvt);
+ chip_major = nvt_cr_read(nvt, CR_CHIP_ID_HI);
+ }
+
+ chip_minor = nvt_cr_read(nvt, CR_CHIP_ID_LO);
+
+ /* these are the known working chip revisions... */
+ switch (chip_major) {
+ case CHIP_ID_HIGH_667:
+ strcpy(chip_id, "w83667hg\0");
+ if (chip_minor != CHIP_ID_LOW_667)
+ chip_unknown = true;
+ break;
+ case CHIP_ID_HIGH_677B:
+ strcpy(chip_id, "w83677hg\0");
+ if (chip_minor != CHIP_ID_LOW_677B2 &&
+ chip_minor != CHIP_ID_LOW_677B3)
+ chip_unknown = true;
+ break;
+ case CHIP_ID_HIGH_677C:
+ strcpy(chip_id, "w83677hg-c\0");
+ if (chip_minor != CHIP_ID_LOW_677C)
+ chip_unknown = true;
+ break;
+ default:
+ strcpy(chip_id, "w836x7hg\0");
+ chip_unknown = true;
+ break;
+ }
+
+ /* warn, but still let the driver load, if we don't know this chip */
+ if (chip_unknown)
+ nvt_pr(KERN_WARNING, "%s: unknown chip, id: 0x%02x 0x%02x, "
+ "it may not work...", chip_id, chip_major, chip_minor);
+ else
+ nvt_dbg("%s: chip id: 0x%02x 0x%02x",
+ chip_id, chip_major, chip_minor);
+
+ nvt_efm_disable(nvt);
+
+ spin_lock_irqsave(&nvt->nvt_lock, flags);
+ nvt->chip_major = chip_major;
+ nvt->chip_minor = chip_minor;
+ spin_unlock_irqrestore(&nvt->nvt_lock, flags);
+
+ return 0;
+}
+
+static void nvt_cir_ldev_init(struct nvt_dev *nvt)
+{
+ u8 val, psreg, psmask, psval;
+
+ if (nvt->chip_major == CHIP_ID_HIGH_667) {
+ psreg = CR_MULTIFUNC_PIN_SEL;
+ psmask = MULTIFUNC_PIN_SEL_MASK;
+ psval = MULTIFUNC_ENABLE_CIR | MULTIFUNC_ENABLE_CIRWB;
+ } else {
+ psreg = CR_OUTPUT_PIN_SEL;
+ psmask = OUTPUT_PIN_SEL_MASK;
+ psval = OUTPUT_ENABLE_CIR | OUTPUT_ENABLE_CIRWB;
+ }
+
+ /* output pin selection: enable CIR, with WB sensor enabled */
+ val = nvt_cr_read(nvt, psreg);
+ val &= psmask;
+ val |= psval;
+ nvt_cr_write(nvt, val, psreg);
+
+ /* Select CIR logical device and enable */
+ nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR);
+ nvt_cr_write(nvt, LOGICAL_DEV_ENABLE, CR_LOGICAL_DEV_EN);
+
+ nvt_cr_write(nvt, nvt->cir_addr >> 8, CR_CIR_BASE_ADDR_HI);
+ nvt_cr_write(nvt, nvt->cir_addr & 0xff, CR_CIR_BASE_ADDR_LO);
+
+ nvt_cr_write(nvt, nvt->cir_irq, CR_CIR_IRQ_RSRC);
+
+ nvt_dbg("CIR initialized, base io port address: 0x%lx, irq: %d",
+ nvt->cir_addr, nvt->cir_irq);
+}
+
+static void nvt_cir_wake_ldev_init(struct nvt_dev *nvt)
+{
+ /* Select ACPI logical device, enable it and CIR Wake */
+ nvt_select_logical_dev(nvt, LOGICAL_DEV_ACPI);
+ nvt_cr_write(nvt, LOGICAL_DEV_ENABLE, CR_LOGICAL_DEV_EN);
+
+ /* Enable CIR Wake via PSOUT# (Pin60) */
+ nvt_set_reg_bit(nvt, CIR_WAKE_ENABLE_BIT, CR_ACPI_CIR_WAKE);
+
+ /* enable pme interrupt of cir wakeup event */
+ nvt_set_reg_bit(nvt, PME_INTR_CIR_PASS_BIT, CR_ACPI_IRQ_EVENTS2);
+
+ /* Select CIR Wake logical device and enable */
+ nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR_WAKE);
+ nvt_cr_write(nvt, LOGICAL_DEV_ENABLE, CR_LOGICAL_DEV_EN);
+
+ nvt_cr_write(nvt, nvt->cir_wake_addr >> 8, CR_CIR_BASE_ADDR_HI);
+ nvt_cr_write(nvt, nvt->cir_wake_addr & 0xff, CR_CIR_BASE_ADDR_LO);
+
+ nvt_cr_write(nvt, nvt->cir_wake_irq, CR_CIR_IRQ_RSRC);
+
+ nvt_dbg("CIR Wake initialized, base io port address: 0x%lx, irq: %d",
+ nvt->cir_wake_addr, nvt->cir_wake_irq);
+}
+
+/* clear out the hardware's cir rx fifo */
+static void nvt_clear_cir_fifo(struct nvt_dev *nvt)
+{
+ u8 val;
+
+ val = nvt_cir_reg_read(nvt, CIR_FIFOCON);
+ nvt_cir_reg_write(nvt, val | CIR_FIFOCON_RXFIFOCLR, CIR_FIFOCON);
+}
+
+/* clear out the hardware's cir wake rx fifo */
+static void nvt_clear_cir_wake_fifo(struct nvt_dev *nvt)
+{
+ u8 val;
+
+ val = nvt_cir_wake_reg_read(nvt, CIR_WAKE_FIFOCON);
+ nvt_cir_wake_reg_write(nvt, val | CIR_WAKE_FIFOCON_RXFIFOCLR,
+ CIR_WAKE_FIFOCON);
+}
+
+/* clear out the hardware's cir tx fifo */
+static void nvt_clear_tx_fifo(struct nvt_dev *nvt)
+{
+ u8 val;
+
+ val = nvt_cir_reg_read(nvt, CIR_FIFOCON);
+ nvt_cir_reg_write(nvt, val | CIR_FIFOCON_TXFIFOCLR, CIR_FIFOCON);
+}
+
+/* enable RX Trigger Level Reach and Packet End interrupts */
+static void nvt_set_cir_iren(struct nvt_dev *nvt)
+{
+ u8 iren;
+
+ iren = CIR_IREN_RTR | CIR_IREN_PE;
+ nvt_cir_reg_write(nvt, iren, CIR_IREN);
+}
+
+static void nvt_cir_regs_init(struct nvt_dev *nvt)
+{
+ /* set sample limit count (PE interrupt raised when reached) */
+ nvt_cir_reg_write(nvt, CIR_RX_LIMIT_COUNT >> 8, CIR_SLCH);
+ nvt_cir_reg_write(nvt, CIR_RX_LIMIT_COUNT & 0xff, CIR_SLCL);
+
+ /* set fifo irq trigger levels */
+ nvt_cir_reg_write(nvt, CIR_FIFOCON_TX_TRIGGER_LEV |
+ CIR_FIFOCON_RX_TRIGGER_LEV, CIR_FIFOCON);
+
+ /*
+ * Enable TX and RX, specify carrier on = low, off = high, and set
+ * sample period (currently 50us)
+ */
+ nvt_cir_reg_write(nvt,
+ CIR_IRCON_TXEN | CIR_IRCON_RXEN |
+ CIR_IRCON_RXINV | CIR_IRCON_SAMPLE_PERIOD_SEL,
+ CIR_IRCON);
+
+ /* clear hardware rx and tx fifos */
+ nvt_clear_cir_fifo(nvt);
+ nvt_clear_tx_fifo(nvt);
+
+ /* clear any and all stray interrupts */
+ nvt_cir_reg_write(nvt, 0xff, CIR_IRSTS);
+
+ /* and finally, enable interrupts */
+ nvt_set_cir_iren(nvt);
+}
+
+static void nvt_cir_wake_regs_init(struct nvt_dev *nvt)
+{
+ /* set number of bytes needed for wake from s3 (default 65) */
+ nvt_cir_wake_reg_write(nvt, CIR_WAKE_FIFO_CMP_BYTES,
+ CIR_WAKE_FIFO_CMP_DEEP);
+
+ /* set tolerance/variance allowed per byte during wake compare */
+ nvt_cir_wake_reg_write(nvt, CIR_WAKE_CMP_TOLERANCE,
+ CIR_WAKE_FIFO_CMP_TOL);
+
+ /* set sample limit count (PE interrupt raised when reached) */
+ nvt_cir_wake_reg_write(nvt, CIR_RX_LIMIT_COUNT >> 8, CIR_WAKE_SLCH);
+ nvt_cir_wake_reg_write(nvt, CIR_RX_LIMIT_COUNT & 0xff, CIR_WAKE_SLCL);
+
+ /* set cir wake fifo rx trigger level (currently 67) */
+ nvt_cir_wake_reg_write(nvt, CIR_WAKE_FIFOCON_RX_TRIGGER_LEV,
+ CIR_WAKE_FIFOCON);
+
+ /*
+ * Enable TX and RX, specific carrier on = low, off = high, and set
+ * sample period (currently 50us)
+ */
+ nvt_cir_wake_reg_write(nvt, CIR_WAKE_IRCON_MODE0 | CIR_WAKE_IRCON_RXEN |
+ CIR_WAKE_IRCON_R | CIR_WAKE_IRCON_RXINV |
+ CIR_WAKE_IRCON_SAMPLE_PERIOD_SEL,
+ CIR_WAKE_IRCON);
+
+ /* clear cir wake rx fifo */
+ nvt_clear_cir_wake_fifo(nvt);
+
+ /* clear any and all stray interrupts */
+ nvt_cir_wake_reg_write(nvt, 0xff, CIR_WAKE_IRSTS);
+}
+
+static void nvt_enable_wake(struct nvt_dev *nvt)
+{
+ nvt_efm_enable(nvt);
+
+ nvt_select_logical_dev(nvt, LOGICAL_DEV_ACPI);
+ nvt_set_reg_bit(nvt, CIR_WAKE_ENABLE_BIT, CR_ACPI_CIR_WAKE);
+ nvt_set_reg_bit(nvt, PME_INTR_CIR_PASS_BIT, CR_ACPI_IRQ_EVENTS2);
+
+ nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR_WAKE);
+ nvt_cr_write(nvt, LOGICAL_DEV_ENABLE, CR_LOGICAL_DEV_EN);
+
+ nvt_efm_disable(nvt);
+
+ nvt_cir_wake_reg_write(nvt, CIR_WAKE_IRCON_MODE0 | CIR_WAKE_IRCON_RXEN |
+ CIR_WAKE_IRCON_R | CIR_WAKE_IRCON_RXINV |
+ CIR_WAKE_IRCON_SAMPLE_PERIOD_SEL,
+ CIR_WAKE_IRCON);
+ nvt_cir_wake_reg_write(nvt, 0xff, CIR_WAKE_IRSTS);
+ nvt_cir_wake_reg_write(nvt, 0, CIR_WAKE_IREN);
+}
+
+#if 0 /* Currently unused */
+/* rx carrier detect only works in learning mode, must be called w/nvt_lock */
+static u32 nvt_rx_carrier_detect(struct nvt_dev *nvt)
+{
+ u32 count, carrier, duration = 0;
+ int i;
+
+ count = nvt_cir_reg_read(nvt, CIR_FCCL) |
+ nvt_cir_reg_read(nvt, CIR_FCCH) << 8;
+
+ for (i = 0; i < nvt->pkts; i++) {
+ if (nvt->buf[i] & BUF_PULSE_BIT)
+ duration += nvt->buf[i] & BUF_LEN_MASK;
+ }
+
+ duration *= SAMPLE_PERIOD;
+
+ if (!count || !duration) {
+ nvt_pr(KERN_NOTICE, "Unable to determine carrier! (c:%u, d:%u)",
+ count, duration);
+ return 0;
+ }
+
+ carrier = MS_TO_NS(count) / duration;
+
+ if ((carrier > MAX_CARRIER) || (carrier < MIN_CARRIER))
+ nvt_dbg("WTF? Carrier frequency out of range!");
+
+ nvt_dbg("Carrier frequency: %u (count %u, duration %u)",
+ carrier, count, duration);
+
+ return carrier;
+}
+#endif
+/*
+ * set carrier frequency
+ *
+ * set carrier on 2 registers: CP & CC
+ * always set CP as 0x81
+ * set CC by SPEC, CC = 3MHz/carrier - 1
+ */
+static int nvt_set_tx_carrier(struct rc_dev *dev, u32 carrier)
+{
+ struct nvt_dev *nvt = dev->priv;
+ u16 val;
+
+ if (carrier == 0)
+ return -EINVAL;
+
+ nvt_cir_reg_write(nvt, 1, CIR_CP);
+ val = 3000000 / (carrier) - 1;
+ nvt_cir_reg_write(nvt, val & 0xff, CIR_CC);
+
+ nvt_dbg("cp: 0x%x cc: 0x%x\n",
+ nvt_cir_reg_read(nvt, CIR_CP), nvt_cir_reg_read(nvt, CIR_CC));
+
+ return 0;
+}
+
+/*
+ * nvt_tx_ir
+ *
+ * 1) clean TX fifo first (handled by AP)
+ * 2) copy data from user space
+ * 3) disable RX interrupts, enable TX interrupts: TTR & TFU
+ * 4) send 9 packets to TX FIFO to open TTR
+ * in interrupt_handler:
+ * 5) send all data out
+ * go back to write():
+ * 6) disable TX interrupts, re-enable RX interupts
+ *
+ * The key problem of this function is user space data may larger than
+ * driver's data buf length. So nvt_tx_ir() will only copy TX_BUF_LEN data to
+ * buf, and keep current copied data buf num in cur_buf_num. But driver's buf
+ * number may larger than TXFCONT (0xff). So in interrupt_handler, it has to
+ * set TXFCONT as 0xff, until buf_count less than 0xff.
+ */
+static int nvt_tx_ir(struct rc_dev *dev, unsigned *txbuf, unsigned n)
+{
+ struct nvt_dev *nvt = dev->priv;
+ unsigned long flags;
+ unsigned int i;
+ u8 iren;
+ int ret;
+
+ spin_lock_irqsave(&nvt->tx.lock, flags);
+
+ ret = min((unsigned)(TX_BUF_LEN / sizeof(unsigned)), n);
+ nvt->tx.buf_count = (ret * sizeof(unsigned));
+
+ memcpy(nvt->tx.buf, txbuf, nvt->tx.buf_count);
+
+ nvt->tx.cur_buf_num = 0;
+
+ /* save currently enabled interrupts */
+ iren = nvt_cir_reg_read(nvt, CIR_IREN);
+
+ /* now disable all interrupts, save TFU & TTR */
+ nvt_cir_reg_write(nvt, CIR_IREN_TFU | CIR_IREN_TTR, CIR_IREN);
+
+ nvt->tx.tx_state = ST_TX_REPLY;
+
+ nvt_cir_reg_write(nvt, CIR_FIFOCON_TX_TRIGGER_LEV_8 |
+ CIR_FIFOCON_RXFIFOCLR, CIR_FIFOCON);
+
+ /* trigger TTR interrupt by writing out ones, (yes, it's ugly) */
+ for (i = 0; i < 9; i++)
+ nvt_cir_reg_write(nvt, 0x01, CIR_STXFIFO);
+
+ spin_unlock_irqrestore(&nvt->tx.lock, flags);
+
+ wait_event(nvt->tx.queue, nvt->tx.tx_state == ST_TX_REQUEST);
+
+ spin_lock_irqsave(&nvt->tx.lock, flags);
+ nvt->tx.tx_state = ST_TX_NONE;
+ spin_unlock_irqrestore(&nvt->tx.lock, flags);
+
+ /* restore enabled interrupts to prior state */
+ nvt_cir_reg_write(nvt, iren, CIR_IREN);
+
+ return ret;
+}
+
+/* dump contents of the last rx buffer we got from the hw rx fifo */
+static void nvt_dump_rx_buf(struct nvt_dev *nvt)
+{
+ int i;
+
+ printk(KERN_DEBUG "%s (len %d): ", __func__, nvt->pkts);
+ for (i = 0; (i < nvt->pkts) && (i < RX_BUF_LEN); i++)
+ printk(KERN_CONT "0x%02x ", nvt->buf[i]);
+ printk(KERN_CONT "\n");
+}
+
+/*
+ * Process raw data in rx driver buffer, store it in raw IR event kfifo,
+ * trigger decode when appropriate.
+ *
+ * We get IR data samples one byte at a time. If the msb is set, its a pulse,
+ * otherwise its a space. The lower 7 bits are the count of SAMPLE_PERIOD
+ * (default 50us) intervals for that pulse/space. A discrete signal is
+ * followed by a series of 0x7f packets, then either 0x7<something> or 0x80
+ * to signal more IR coming (repeats) or end of IR, respectively. We store
+ * sample data in the raw event kfifo until we see 0x7<something> (except f)
+ * or 0x80, at which time, we trigger a decode operation.
+ */
+static void nvt_process_rx_ir_data(struct nvt_dev *nvt)
+{
+ DEFINE_IR_RAW_EVENT(rawir);
+ u8 sample;
+ int i;
+
+ nvt_dbg_verbose("%s firing", __func__);
+
+ if (debug)
+ nvt_dump_rx_buf(nvt);
+
+ nvt_dbg_verbose("Processing buffer of len %d", nvt->pkts);
+
+ init_ir_raw_event(&rawir);
+
+ for (i = 0; i < nvt->pkts; i++) {
+ sample = nvt->buf[i];
+
+ rawir.pulse = ((sample & BUF_PULSE_BIT) != 0);
+ rawir.duration = US_TO_NS((sample & BUF_LEN_MASK)
+ * SAMPLE_PERIOD);
+
+ nvt_dbg("Storing %s with duration %d",
+ rawir.pulse ? "pulse" : "space", rawir.duration);
+
+ ir_raw_event_store_with_filter(nvt->rdev, &rawir);
+
+ /*
+ * BUF_PULSE_BIT indicates end of IR data, BUF_REPEAT_BYTE
+ * indicates end of IR signal, but new data incoming. In both
+ * cases, it means we're ready to call ir_raw_event_handle
+ */
+ if ((sample == BUF_PULSE_BIT) && (i + 1 < nvt->pkts)) {
+ nvt_dbg("Calling ir_raw_event_handle (signal end)\n");
+ ir_raw_event_handle(nvt->rdev);
+ }
+ }
+
+ nvt->pkts = 0;
+
+ nvt_dbg("Calling ir_raw_event_handle (buffer empty)\n");
+ ir_raw_event_handle(nvt->rdev);
+
+ nvt_dbg_verbose("%s done", __func__);
+}
+
+static void nvt_handle_rx_fifo_overrun(struct nvt_dev *nvt)
+{
+ nvt_pr(KERN_WARNING, "RX FIFO overrun detected, flushing data!");
+
+ nvt->pkts = 0;
+ nvt_clear_cir_fifo(nvt);
+ ir_raw_event_reset(nvt->rdev);
+}
+
+/* copy data from hardware rx fifo into driver buffer */
+static void nvt_get_rx_ir_data(struct nvt_dev *nvt)
+{
+ unsigned long flags;
+ u8 fifocount, val;
+ unsigned int b_idx;
+ bool overrun = false;
+ int i;
+
+ /* Get count of how many bytes to read from RX FIFO */
+ fifocount = nvt_cir_reg_read(nvt, CIR_RXFCONT);
+ /* if we get 0xff, probably means the logical dev is disabled */
+ if (fifocount == 0xff)
+ return;
+ /* watch out for a fifo overrun condition */
+ else if (fifocount > RX_BUF_LEN) {
+ overrun = true;
+ fifocount = RX_BUF_LEN;
+ }
+
+ nvt_dbg("attempting to fetch %u bytes from hw rx fifo", fifocount);
+
+ spin_lock_irqsave(&nvt->nvt_lock, flags);
+
+ b_idx = nvt->pkts;
+
+ /* This should never happen, but lets check anyway... */
+ if (b_idx + fifocount > RX_BUF_LEN) {
+ nvt_process_rx_ir_data(nvt);
+ b_idx = 0;
+ }
+
+ /* Read fifocount bytes from CIR Sample RX FIFO register */
+ for (i = 0; i < fifocount; i++) {
+ val = nvt_cir_reg_read(nvt, CIR_SRXFIFO);
+ nvt->buf[b_idx + i] = val;
+ }
+
+ nvt->pkts += fifocount;
+ nvt_dbg("%s: pkts now %d", __func__, nvt->pkts);
+
+ nvt_process_rx_ir_data(nvt);
+
+ if (overrun)
+ nvt_handle_rx_fifo_overrun(nvt);
+
+ spin_unlock_irqrestore(&nvt->nvt_lock, flags);
+}
+
+static void nvt_cir_log_irqs(u8 status, u8 iren)
+{
+ nvt_pr(KERN_INFO, "IRQ 0x%02x (IREN 0x%02x) :%s%s%s%s%s%s%s%s%s",
+ status, iren,
+ status & CIR_IRSTS_RDR ? " RDR" : "",
+ status & CIR_IRSTS_RTR ? " RTR" : "",
+ status & CIR_IRSTS_PE ? " PE" : "",
+ status & CIR_IRSTS_RFO ? " RFO" : "",
+ status & CIR_IRSTS_TE ? " TE" : "",
+ status & CIR_IRSTS_TTR ? " TTR" : "",
+ status & CIR_IRSTS_TFU ? " TFU" : "",
+ status & CIR_IRSTS_GH ? " GH" : "",
+ status & ~(CIR_IRSTS_RDR | CIR_IRSTS_RTR | CIR_IRSTS_PE |
+ CIR_IRSTS_RFO | CIR_IRSTS_TE | CIR_IRSTS_TTR |
+ CIR_IRSTS_TFU | CIR_IRSTS_GH) ? " ?" : "");
+}
+
+static bool nvt_cir_tx_inactive(struct nvt_dev *nvt)
+{
+ unsigned long flags;
+ bool tx_inactive;
+ u8 tx_state;
+
+ spin_lock_irqsave(&nvt->tx.lock, flags);
+ tx_state = nvt->tx.tx_state;
+ spin_unlock_irqrestore(&nvt->tx.lock, flags);
+
+ tx_inactive = (tx_state == ST_TX_NONE);
+
+ return tx_inactive;
+}
+
+/* interrupt service routine for incoming and outgoing CIR data */
+static irqreturn_t nvt_cir_isr(int irq, void *data)
+{
+ struct nvt_dev *nvt = data;
+ u8 status, iren, cur_state;
+ unsigned long flags;
+
+ nvt_dbg_verbose("%s firing", __func__);
+
+ nvt_efm_enable(nvt);
+ nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR);
+ nvt_efm_disable(nvt);
+
+ /*
+ * Get IR Status register contents. Write 1 to ack/clear
+ *
+ * bit: reg name - description
+ * 7: CIR_IRSTS_RDR - RX Data Ready
+ * 6: CIR_IRSTS_RTR - RX FIFO Trigger Level Reach
+ * 5: CIR_IRSTS_PE - Packet End
+ * 4: CIR_IRSTS_RFO - RX FIFO Overrun (RDR will also be set)
+ * 3: CIR_IRSTS_TE - TX FIFO Empty
+ * 2: CIR_IRSTS_TTR - TX FIFO Trigger Level Reach
+ * 1: CIR_IRSTS_TFU - TX FIFO Underrun
+ * 0: CIR_IRSTS_GH - Min Length Detected
+ */
+ status = nvt_cir_reg_read(nvt, CIR_IRSTS);
+ if (!status) {
+ nvt_dbg_verbose("%s exiting, IRSTS 0x0", __func__);
+ nvt_cir_reg_write(nvt, 0xff, CIR_IRSTS);
+ return IRQ_RETVAL(IRQ_NONE);
+ }
+
+ /* ack/clear all irq flags we've got */
+ nvt_cir_reg_write(nvt, status, CIR_IRSTS);
+ nvt_cir_reg_write(nvt, 0, CIR_IRSTS);
+
+ /* Interrupt may be shared with CIR Wake, bail if CIR not enabled */
+ iren = nvt_cir_reg_read(nvt, CIR_IREN);
+ if (!iren) {
+ nvt_dbg_verbose("%s exiting, CIR not enabled", __func__);
+ return IRQ_RETVAL(IRQ_NONE);
+ }
+
+ if (debug)
+ nvt_cir_log_irqs(status, iren);
+
+ if (status & CIR_IRSTS_RTR) {
+ /* FIXME: add code for study/learn mode */
+ /* We only do rx if not tx'ing */
+ if (nvt_cir_tx_inactive(nvt))
+ nvt_get_rx_ir_data(nvt);
+ }
+
+ if (status & CIR_IRSTS_PE) {
+ if (nvt_cir_tx_inactive(nvt))
+ nvt_get_rx_ir_data(nvt);
+
+ spin_lock_irqsave(&nvt->nvt_lock, flags);
+
+ cur_state = nvt->study_state;
+
+ spin_unlock_irqrestore(&nvt->nvt_lock, flags);
+
+ if (cur_state == ST_STUDY_NONE)
+ nvt_clear_cir_fifo(nvt);
+ }
+
+ if (status & CIR_IRSTS_TE)
+ nvt_clear_tx_fifo(nvt);
+
+ if (status & CIR_IRSTS_TTR) {
+ unsigned int pos, count;
+ u8 tmp;
+
+ spin_lock_irqsave(&nvt->tx.lock, flags);
+
+ pos = nvt->tx.cur_buf_num;
+ count = nvt->tx.buf_count;
+
+ /* Write data into the hardware tx fifo while pos < count */
+ if (pos < count) {
+ nvt_cir_reg_write(nvt, nvt->tx.buf[pos], CIR_STXFIFO);
+ nvt->tx.cur_buf_num++;
+ /* Disable TX FIFO Trigger Level Reach (TTR) interrupt */
+ } else {
+ tmp = nvt_cir_reg_read(nvt, CIR_IREN);
+ nvt_cir_reg_write(nvt, tmp & ~CIR_IREN_TTR, CIR_IREN);
+ }
+
+ spin_unlock_irqrestore(&nvt->tx.lock, flags);
+
+ }
+
+ if (status & CIR_IRSTS_TFU) {
+ spin_lock_irqsave(&nvt->tx.lock, flags);
+ if (nvt->tx.tx_state == ST_TX_REPLY) {
+ nvt->tx.tx_state = ST_TX_REQUEST;
+ wake_up(&nvt->tx.queue);
+ }
+ spin_unlock_irqrestore(&nvt->tx.lock, flags);
+ }
+
+ nvt_dbg_verbose("%s done", __func__);
+ return IRQ_RETVAL(IRQ_HANDLED);
+}
+
+/* Interrupt service routine for CIR Wake */
+static irqreturn_t nvt_cir_wake_isr(int irq, void *data)
+{
+ u8 status, iren, val;
+ struct nvt_dev *nvt = data;
+ unsigned long flags;
+
+ nvt_dbg_wake("%s firing", __func__);
+
+ status = nvt_cir_wake_reg_read(nvt, CIR_WAKE_IRSTS);
+ if (!status)
+ return IRQ_RETVAL(IRQ_NONE);
+
+ if (status & CIR_WAKE_IRSTS_IR_PENDING)
+ nvt_clear_cir_wake_fifo(nvt);
+
+ nvt_cir_wake_reg_write(nvt, status, CIR_WAKE_IRSTS);
+ nvt_cir_wake_reg_write(nvt, 0, CIR_WAKE_IRSTS);
+
+ /* Interrupt may be shared with CIR, bail if Wake not enabled */
+ iren = nvt_cir_wake_reg_read(nvt, CIR_WAKE_IREN);
+ if (!iren) {
+ nvt_dbg_wake("%s exiting, wake not enabled", __func__);
+ return IRQ_RETVAL(IRQ_HANDLED);
+ }
+
+ if ((status & CIR_WAKE_IRSTS_PE) &&
+ (nvt->wake_state == ST_WAKE_START)) {
+ while (nvt_cir_wake_reg_read(nvt, CIR_WAKE_RD_FIFO_ONLY_IDX)) {
+ val = nvt_cir_wake_reg_read(nvt, CIR_WAKE_RD_FIFO_ONLY);
+ nvt_dbg("setting wake up key: 0x%x", val);
+ }
+
+ nvt_cir_wake_reg_write(nvt, 0, CIR_WAKE_IREN);
+ spin_lock_irqsave(&nvt->nvt_lock, flags);
+ nvt->wake_state = ST_WAKE_FINISH;
+ spin_unlock_irqrestore(&nvt->nvt_lock, flags);
+ }
+
+ nvt_dbg_wake("%s done", __func__);
+ return IRQ_RETVAL(IRQ_HANDLED);
+}
+
+static void nvt_enable_cir(struct nvt_dev *nvt)
+{
+ /* set function enable flags */
+ nvt_cir_reg_write(nvt, CIR_IRCON_TXEN | CIR_IRCON_RXEN |
+ CIR_IRCON_RXINV | CIR_IRCON_SAMPLE_PERIOD_SEL,
+ CIR_IRCON);
+
+ nvt_efm_enable(nvt);
+
+ /* enable the CIR logical device */
+ nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR);
+ nvt_cr_write(nvt, LOGICAL_DEV_ENABLE, CR_LOGICAL_DEV_EN);
+
+ nvt_efm_disable(nvt);
+
+ /* clear all pending interrupts */
+ nvt_cir_reg_write(nvt, 0xff, CIR_IRSTS);
+
+ /* enable interrupts */
+ nvt_set_cir_iren(nvt);
+}
+
+static void nvt_disable_cir(struct nvt_dev *nvt)
+{
+ /* disable CIR interrupts */
+ nvt_cir_reg_write(nvt, 0, CIR_IREN);
+
+ /* clear any and all pending interrupts */
+ nvt_cir_reg_write(nvt, 0xff, CIR_IRSTS);
+
+ /* clear all function enable flags */
+ nvt_cir_reg_write(nvt, 0, CIR_IRCON);
+
+ /* clear hardware rx and tx fifos */
+ nvt_clear_cir_fifo(nvt);
+ nvt_clear_tx_fifo(nvt);
+
+ nvt_efm_enable(nvt);
+
+ /* disable the CIR logical device */
+ nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR);
+ nvt_cr_write(nvt, LOGICAL_DEV_DISABLE, CR_LOGICAL_DEV_EN);
+
+ nvt_efm_disable(nvt);
+}
+
+static int nvt_open(struct rc_dev *dev)
+{
+ struct nvt_dev *nvt = dev->priv;
+ unsigned long flags;
+
+ spin_lock_irqsave(&nvt->nvt_lock, flags);
+ nvt_enable_cir(nvt);
+ spin_unlock_irqrestore(&nvt->nvt_lock, flags);
+
+ return 0;
+}
+
+static void nvt_close(struct rc_dev *dev)
+{
+ struct nvt_dev *nvt = dev->priv;
+ unsigned long flags;
+
+ spin_lock_irqsave(&nvt->nvt_lock, flags);
+ nvt_disable_cir(nvt);
+ spin_unlock_irqrestore(&nvt->nvt_lock, flags);
+}
+
+/* Allocate memory, probe hardware, and initialize everything */
+static int nvt_probe(struct pnp_dev *pdev, const struct pnp_device_id *dev_id)
+{
+ struct nvt_dev *nvt;
+ struct rc_dev *rdev;
+ int ret = -ENOMEM;
+
+ nvt = kzalloc(sizeof(struct nvt_dev), GFP_KERNEL);
+ if (!nvt)
+ return ret;
+
+ /* input device for IR remote (and tx) */
+ rdev = rc_allocate_device();
+ if (!rdev)
+ goto exit_free_dev_rdev;
+
+ ret = -ENODEV;
+ /* activate pnp device */
+ if (pnp_activate_dev(pdev) < 0) {
+ dev_err(&pdev->dev, "Could not activate PNP device!\n");
+ goto exit_free_dev_rdev;
+ }
+
+ /* validate pnp resources */
+ if (!pnp_port_valid(pdev, 0) ||
+ pnp_port_len(pdev, 0) < CIR_IOREG_LENGTH) {
+ dev_err(&pdev->dev, "IR PNP Port not valid!\n");
+ goto exit_free_dev_rdev;
+ }
+
+ if (!pnp_irq_valid(pdev, 0)) {
+ dev_err(&pdev->dev, "PNP IRQ not valid!\n");
+ goto exit_free_dev_rdev;
+ }
+
+ if (!pnp_port_valid(pdev, 1) ||
+ pnp_port_len(pdev, 1) < CIR_IOREG_LENGTH) {
+ dev_err(&pdev->dev, "Wake PNP Port not valid!\n");
+ goto exit_free_dev_rdev;
+ }
+
+ nvt->cir_addr = pnp_port_start(pdev, 0);
+ nvt->cir_irq = pnp_irq(pdev, 0);
+
+ nvt->cir_wake_addr = pnp_port_start(pdev, 1);
+ /* irq is always shared between cir and cir wake */
+ nvt->cir_wake_irq = nvt->cir_irq;
+
+ nvt->cr_efir = CR_EFIR;
+ nvt->cr_efdr = CR_EFDR;
+
+ spin_lock_init(&nvt->nvt_lock);
+ spin_lock_init(&nvt->tx.lock);
+
+ pnp_set_drvdata(pdev, nvt);
+ nvt->pdev = pdev;
+
+ init_waitqueue_head(&nvt->tx.queue);
+
+ ret = nvt_hw_detect(nvt);
+ if (ret)
+ goto exit_free_dev_rdev;
+
+ /* Initialize CIR & CIR Wake Logical Devices */
+ nvt_efm_enable(nvt);
+ nvt_cir_ldev_init(nvt);
+ nvt_cir_wake_ldev_init(nvt);
+ nvt_efm_disable(nvt);
+
+ /* Initialize CIR & CIR Wake Config Registers */
+ nvt_cir_regs_init(nvt);
+ nvt_cir_wake_regs_init(nvt);
+
+ /* Set up the rc device */
+ rdev->priv = nvt;
+ rdev->driver_type = RC_DRIVER_IR_RAW;
+ rdev->allowed_protocols = RC_BIT_ALL;
+ rdev->open = nvt_open;
+ rdev->close = nvt_close;
+ rdev->tx_ir = nvt_tx_ir;
+ rdev->s_tx_carrier = nvt_set_tx_carrier;
+ rdev->input_name = "Nuvoton w836x7hg Infrared Remote Transceiver";
+ rdev->input_phys = "nuvoton/cir0";
+ rdev->input_id.bustype = BUS_HOST;
+ rdev->input_id.vendor = PCI_VENDOR_ID_WINBOND2;
+ rdev->input_id.product = nvt->chip_major;
+ rdev->input_id.version = nvt->chip_minor;
+ rdev->dev.parent = &pdev->dev;
+ rdev->driver_name = NVT_DRIVER_NAME;
+ rdev->map_name = RC_MAP_RC6_MCE;
+ rdev->timeout = MS_TO_NS(100);
+ /* rx resolution is hardwired to 50us atm, 1, 25, 100 also possible */
+ rdev->rx_resolution = US_TO_NS(CIR_SAMPLE_PERIOD);
+#if 0
+ rdev->min_timeout = XYZ;
+ rdev->max_timeout = XYZ;
+ /* tx bits */
+ rdev->tx_resolution = XYZ;
+#endif
+ nvt->rdev = rdev;
+
+ ret = rc_register_device(rdev);
+ if (ret)
+ goto exit_free_dev_rdev;
+
+ ret = -EBUSY;
+ /* now claim resources */
+ if (!request_region(nvt->cir_addr,
+ CIR_IOREG_LENGTH, NVT_DRIVER_NAME))
+ goto exit_unregister_device;
+
+ if (request_irq(nvt->cir_irq, nvt_cir_isr, IRQF_SHARED,
+ NVT_DRIVER_NAME, (void *)nvt))
+ goto exit_release_cir_addr;
+
+ if (!request_region(nvt->cir_wake_addr,
+ CIR_IOREG_LENGTH, NVT_DRIVER_NAME))
+ goto exit_free_irq;
+
+ if (request_irq(nvt->cir_wake_irq, nvt_cir_wake_isr, IRQF_SHARED,
+ NVT_DRIVER_NAME, (void *)nvt))
+ goto exit_release_cir_wake_addr;
+
+ device_init_wakeup(&pdev->dev, true);
+
+ nvt_pr(KERN_NOTICE, "driver has been successfully loaded\n");
+ if (debug) {
+ cir_dump_regs(nvt);
+ cir_wake_dump_regs(nvt);
+ }
+
+ return 0;
+
+exit_release_cir_wake_addr:
+ release_region(nvt->cir_wake_addr, CIR_IOREG_LENGTH);
+exit_free_irq:
+ free_irq(nvt->cir_irq, nvt);
+exit_release_cir_addr:
+ release_region(nvt->cir_addr, CIR_IOREG_LENGTH);
+exit_unregister_device:
+ rc_unregister_device(rdev);
+ rdev = NULL;
+exit_free_dev_rdev:
+ rc_free_device(rdev);
+ kfree(nvt);
+
+ return ret;
+}
+
+static void nvt_remove(struct pnp_dev *pdev)
+{
+ struct nvt_dev *nvt = pnp_get_drvdata(pdev);
+ unsigned long flags;
+
+ spin_lock_irqsave(&nvt->nvt_lock, flags);
+ /* disable CIR */
+ nvt_cir_reg_write(nvt, 0, CIR_IREN);
+ nvt_disable_cir(nvt);
+ /* enable CIR Wake (for IR power-on) */
+ nvt_enable_wake(nvt);
+ spin_unlock_irqrestore(&nvt->nvt_lock, flags);
+
+ /* free resources */
+ free_irq(nvt->cir_irq, nvt);
+ free_irq(nvt->cir_wake_irq, nvt);
+ release_region(nvt->cir_addr, CIR_IOREG_LENGTH);
+ release_region(nvt->cir_wake_addr, CIR_IOREG_LENGTH);
+
+ rc_unregister_device(nvt->rdev);
+
+ kfree(nvt);
+}
+
+static int nvt_suspend(struct pnp_dev *pdev, pm_message_t state)
+{
+ struct nvt_dev *nvt = pnp_get_drvdata(pdev);
+ unsigned long flags;
+
+ nvt_dbg("%s called", __func__);
+
+ /* zero out misc state tracking */
+ spin_lock_irqsave(&nvt->nvt_lock, flags);
+ nvt->study_state = ST_STUDY_NONE;
+ nvt->wake_state = ST_WAKE_NONE;
+ spin_unlock_irqrestore(&nvt->nvt_lock, flags);
+
+ spin_lock_irqsave(&nvt->tx.lock, flags);
+ nvt->tx.tx_state = ST_TX_NONE;
+ spin_unlock_irqrestore(&nvt->tx.lock, flags);
+
+ /* disable all CIR interrupts */
+ nvt_cir_reg_write(nvt, 0, CIR_IREN);
+
+ nvt_efm_enable(nvt);
+
+ /* disable cir logical dev */
+ nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR);
+ nvt_cr_write(nvt, LOGICAL_DEV_DISABLE, CR_LOGICAL_DEV_EN);
+
+ nvt_efm_disable(nvt);
+
+ /* make sure wake is enabled */
+ nvt_enable_wake(nvt);
+
+ return 0;
+}
+
+static int nvt_resume(struct pnp_dev *pdev)
+{
+ struct nvt_dev *nvt = pnp_get_drvdata(pdev);
+
+ nvt_dbg("%s called", __func__);
+
+ /* open interrupt */
+ nvt_set_cir_iren(nvt);
+
+ /* Enable CIR logical device */
+ nvt_efm_enable(nvt);
+ nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR);
+ nvt_cr_write(nvt, LOGICAL_DEV_ENABLE, CR_LOGICAL_DEV_EN);
+
+ nvt_efm_disable(nvt);
+
+ nvt_cir_regs_init(nvt);
+ nvt_cir_wake_regs_init(nvt);
+
+ return 0;
+}
+
+static void nvt_shutdown(struct pnp_dev *pdev)
+{
+ struct nvt_dev *nvt = pnp_get_drvdata(pdev);
+ nvt_enable_wake(nvt);
+}
+
+static const struct pnp_device_id nvt_ids[] = {
+ { "WEC0530", 0 }, /* CIR */
+ { "NTN0530", 0 }, /* CIR for new chip's pnp id*/
+ { "", 0 },
+};
+
+static struct pnp_driver nvt_driver = {
+ .name = NVT_DRIVER_NAME,
+ .id_table = nvt_ids,
+ .flags = PNP_DRIVER_RES_DO_NOT_CHANGE,
+ .probe = nvt_probe,
+ .remove = nvt_remove,
+ .suspend = nvt_suspend,
+ .resume = nvt_resume,
+ .shutdown = nvt_shutdown,
+};
+
+module_param(debug, int, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(debug, "Enable debugging output");
+
+MODULE_DEVICE_TABLE(pnp, nvt_ids);
+MODULE_DESCRIPTION("Nuvoton W83667HG-A & W83677HG-I CIR driver");
+
+MODULE_AUTHOR("Jarod Wilson <jarod@redhat.com>");
+MODULE_LICENSE("GPL");
+
+module_pnp_driver(nvt_driver);
Code Review / kvmfornfv.git / blobdiff