--- /dev/null
+/*
+ * SMI PCIe driver for DVBSky cards.
+ *
+ * Copyright (C) 2014 Max nibble <nibble.max@gmail.com>
+ *
+ * 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.
+ */
+
+#include "smipcie.h"
+
+static void smi_ir_enableInterrupt(struct smi_rc *ir)
+{
+ struct smi_dev *dev = ir->dev;
+
+ smi_write(MSI_INT_ENA_SET, IR_X_INT);
+}
+
+static void smi_ir_disableInterrupt(struct smi_rc *ir)
+{
+ struct smi_dev *dev = ir->dev;
+
+ smi_write(MSI_INT_ENA_CLR, IR_X_INT);
+}
+
+static void smi_ir_clearInterrupt(struct smi_rc *ir)
+{
+ struct smi_dev *dev = ir->dev;
+
+ smi_write(MSI_INT_STATUS_CLR, IR_X_INT);
+}
+
+static void smi_ir_stop(struct smi_rc *ir)
+{
+ struct smi_dev *dev = ir->dev;
+
+ smi_ir_disableInterrupt(ir);
+ smi_clear(IR_Init_Reg, 0x80);
+}
+
+#define BITS_PER_COMMAND 14
+#define GROUPS_PER_BIT 2
+#define IR_RC5_MIN_BIT 36
+#define IR_RC5_MAX_BIT 52
+static u32 smi_decode_rc5(u8 *pData, u8 size)
+{
+ u8 index, current_bit, bit_count;
+ u8 group_array[BITS_PER_COMMAND * GROUPS_PER_BIT + 4];
+ u8 group_index = 0;
+ u32 command = 0xFFFFFFFF;
+
+ group_array[group_index++] = 1;
+
+ for (index = 0; index < size; index++) {
+
+ current_bit = (pData[index] & 0x80) ? 1 : 0;
+ bit_count = pData[index] & 0x7f;
+
+ if ((current_bit == 1) && (bit_count >= 2*IR_RC5_MAX_BIT + 1)) {
+ goto process_code;
+ } else if ((bit_count >= IR_RC5_MIN_BIT) &&
+ (bit_count <= IR_RC5_MAX_BIT)) {
+ group_array[group_index++] = current_bit;
+ } else if ((bit_count > IR_RC5_MAX_BIT) &&
+ (bit_count <= 2*IR_RC5_MAX_BIT)) {
+ group_array[group_index++] = current_bit;
+ group_array[group_index++] = current_bit;
+ } else {
+ goto invalid_timing;
+ }
+ if (group_index >= BITS_PER_COMMAND*GROUPS_PER_BIT)
+ goto process_code;
+
+ if ((group_index == BITS_PER_COMMAND*GROUPS_PER_BIT - 1)
+ && (group_array[group_index-1] == 0)) {
+ group_array[group_index++] = 1;
+ goto process_code;
+ }
+ }
+
+process_code:
+ if (group_index == (BITS_PER_COMMAND*GROUPS_PER_BIT-1))
+ group_array[group_index++] = 1;
+
+ if (group_index == BITS_PER_COMMAND*GROUPS_PER_BIT) {
+ command = 0;
+ for (index = 0; index < (BITS_PER_COMMAND*GROUPS_PER_BIT);
+ index = index + 2) {
+ if ((group_array[index] == 1) &&
+ (group_array[index+1] == 0)) {
+ command |= (1 << (BITS_PER_COMMAND -
+ (index/2) - 1));
+ } else if ((group_array[index] == 0) &&
+ (group_array[index+1] == 1)) {
+ /* */
+ } else {
+ command = 0xFFFFFFFF;
+ goto invalid_timing;
+ }
+ }
+ }
+
+invalid_timing:
+ return command;
+}
+
+static void smi_ir_decode(struct work_struct *work)
+{
+ struct smi_rc *ir = container_of(work, struct smi_rc, work);
+ struct smi_dev *dev = ir->dev;
+ struct rc_dev *rc_dev = ir->rc_dev;
+ u32 dwIRControl, dwIRData, dwIRCode, scancode;
+ u8 index, ucIRCount, readLoop, rc5_command, rc5_system, toggle;
+
+ dwIRControl = smi_read(IR_Init_Reg);
+ if (dwIRControl & rbIRVld) {
+ ucIRCount = (u8) smi_read(IR_Data_Cnt);
+
+ if (ucIRCount < 4)
+ goto end_ir_decode;
+
+ readLoop = ucIRCount/4;
+ if (ucIRCount % 4)
+ readLoop += 1;
+ for (index = 0; index < readLoop; index++) {
+ dwIRData = smi_read(IR_DATA_BUFFER_BASE + (index*4));
+
+ ir->irData[index*4 + 0] = (u8)(dwIRData);
+ ir->irData[index*4 + 1] = (u8)(dwIRData >> 8);
+ ir->irData[index*4 + 2] = (u8)(dwIRData >> 16);
+ ir->irData[index*4 + 3] = (u8)(dwIRData >> 24);
+ }
+ dwIRCode = smi_decode_rc5(ir->irData, ucIRCount);
+
+ if (dwIRCode != 0xFFFFFFFF) {
+ rc5_command = dwIRCode & 0x3F;
+ rc5_system = (dwIRCode & 0x7C0) >> 6;
+ toggle = (dwIRCode & 0x800) ? 1 : 0;
+ scancode = rc5_system << 8 | rc5_command;
+ rc_keydown(rc_dev, RC_TYPE_RC5, scancode, toggle);
+ }
+ }
+end_ir_decode:
+ smi_set(IR_Init_Reg, 0x04);
+ smi_ir_enableInterrupt(ir);
+}
+
+/* ir functions call by main driver.*/
+int smi_ir_irq(struct smi_rc *ir, u32 int_status)
+{
+ int handled = 0;
+
+ if (int_status & IR_X_INT) {
+ smi_ir_disableInterrupt(ir);
+ smi_ir_clearInterrupt(ir);
+ schedule_work(&ir->work);
+ handled = 1;
+ }
+ return handled;
+}
+
+void smi_ir_start(struct smi_rc *ir)
+{
+ struct smi_dev *dev = ir->dev;
+
+ smi_write(IR_Idle_Cnt_Low, 0x00140070);
+ msleep(20);
+ smi_set(IR_Init_Reg, 0x90);
+
+ smi_ir_enableInterrupt(ir);
+}
+
+int smi_ir_init(struct smi_dev *dev)
+{
+ int ret;
+ struct rc_dev *rc_dev;
+ struct smi_rc *ir = &dev->ir;
+
+ rc_dev = rc_allocate_device();
+ if (!rc_dev)
+ return -ENOMEM;
+
+ /* init input device */
+ snprintf(ir->input_name, sizeof(ir->input_name), "IR (%s)",
+ dev->info->name);
+ snprintf(ir->input_phys, sizeof(ir->input_phys), "pci-%s/ir0",
+ pci_name(dev->pci_dev));
+
+ rc_dev->driver_name = "SMI_PCIe";
+ rc_dev->input_phys = ir->input_phys;
+ rc_dev->input_name = ir->input_name;
+ rc_dev->input_id.bustype = BUS_PCI;
+ rc_dev->input_id.version = 1;
+ rc_dev->input_id.vendor = dev->pci_dev->subsystem_vendor;
+ rc_dev->input_id.product = dev->pci_dev->subsystem_device;
+ rc_dev->dev.parent = &dev->pci_dev->dev;
+
+ rc_dev->driver_type = RC_DRIVER_SCANCODE;
+ rc_dev->map_name = RC_MAP_DVBSKY;
+
+ ir->rc_dev = rc_dev;
+ ir->dev = dev;
+
+ INIT_WORK(&ir->work, smi_ir_decode);
+ smi_ir_disableInterrupt(ir);
+
+ ret = rc_register_device(rc_dev);
+ if (ret)
+ goto ir_err;
+
+ return 0;
+ir_err:
+ rc_free_device(rc_dev);
+ return ret;
+}
+
+void smi_ir_exit(struct smi_dev *dev)
+{
+ struct smi_rc *ir = &dev->ir;
+ struct rc_dev *rc_dev = ir->rc_dev;
+
+ smi_ir_stop(ir);
+ rc_unregister_device(rc_dev);
+ ir->rc_dev = NULL;
+}
projects / platform / kernel / linux-rpi.git / commitdiff