--- /dev/null
+/*
+ * Remote control driver for the TV-card based on bt829
+ *
+ * by Leonid Froenchenko <lfroen@galileo.co.il>
+ *
+ * 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
+*/
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/threads.h>
+#include <linux/sched.h>
+#include <linux/ioport.h>
+#include <linux/pci.h>
+#include <linux/delay.h>
+
+#include <media/lirc_dev.h>
+
+static int poll_main(void);
+static int atir_init_start(void);
+
+static void write_index(unsigned char index, unsigned int value);
+static unsigned int read_index(unsigned char index);
+
+static void do_i2c_start(void);
+static void do_i2c_stop(void);
+
+static void seems_wr_byte(unsigned char al);
+static unsigned char seems_rd_byte(void);
+
+static unsigned int read_index(unsigned char al);
+static void write_index(unsigned char ah, unsigned int edx);
+
+static void cycle_delay(int cycle);
+
+static void do_set_bits(unsigned char bl);
+static unsigned char do_get_bits(void);
+
+#define DATA_PCI_OFF 0x7FFC00
+#define WAIT_CYCLE 20
+
+#define DRIVER_NAME "lirc_bt829"
+
+static int debug;
+#define dprintk(fmt, args...) \
+ do { \
+ if (debug) \
+ printk(KERN_DEBUG DRIVER_NAME ": "fmt, ## args); \
+ } while (0)
+
+static int atir_minor;
+static unsigned long pci_addr_phys;
+static unsigned char *pci_addr_lin;
+
+static struct lirc_driver atir_driver;
+
+static struct pci_dev *do_pci_probe(void)
+{
+ struct pci_dev *my_dev;
+ my_dev = pci_get_device(PCI_VENDOR_ID_ATI,
+ PCI_DEVICE_ID_ATI_264VT, NULL);
+ if (my_dev) {
+ printk(KERN_ERR DRIVER_NAME ": Using device: %s\n",
+ pci_name(my_dev));
+ pci_addr_phys = 0;
+ if (my_dev->resource[0].flags & IORESOURCE_MEM) {
+ pci_addr_phys = my_dev->resource[0].start;
+ printk(KERN_INFO DRIVER_NAME ": memory at 0x%08X \n",
+ (unsigned int)pci_addr_phys);
+ }
+ if (pci_addr_phys == 0) {
+ printk(KERN_ERR DRIVER_NAME ": no memory resource ?\n");
+ return NULL;
+ }
+ } else {
+ printk(KERN_ERR DRIVER_NAME ": pci_probe failed\n");
+ return NULL;
+ }
+ return my_dev;
+}
+
+static int atir_add_to_buf(void *data, struct lirc_buffer *buf)
+{
+ unsigned char key;
+ int status;
+ status = poll_main();
+ key = (status >> 8) & 0xFF;
+ if (status & 0xFF) {
+ dprintk("reading key %02X\n", key);
+ lirc_buffer_write(buf, &key);
+ return 0;
+ }
+ return -ENODATA;
+}
+
+static int atir_set_use_inc(void *data)
+{
+ dprintk("driver is opened\n");
+ return 0;
+}
+
+static void atir_set_use_dec(void *data)
+{
+ dprintk("driver is closed\n");
+}
+
+int init_module(void)
+{
+ struct pci_dev *pdev;
+
+ pdev = do_pci_probe();
+ if (pdev == NULL)
+ return 1;
+
+ if (!atir_init_start())
+ return 1;
+
+ strcpy(atir_driver.name, "ATIR");
+ atir_driver.minor = -1;
+ atir_driver.code_length = 8;
+ atir_driver.sample_rate = 10;
+ atir_driver.data = 0;
+ atir_driver.add_to_buf = atir_add_to_buf;
+ atir_driver.set_use_inc = atir_set_use_inc;
+ atir_driver.set_use_dec = atir_set_use_dec;
+ atir_driver.dev = &pdev->dev;
+ atir_driver.owner = THIS_MODULE;
+
+ atir_minor = lirc_register_driver(&atir_driver);
+ if (atir_minor < 0) {
+ printk(KERN_ERR DRIVER_NAME ": failed to register driver!\n");
+ return atir_minor;
+ }
+ dprintk("driver is registered on minor %d\n", atir_minor);
+
+ return 0;
+}
+
+
+void cleanup_module(void)
+{
+ lirc_unregister_driver(atir_minor);
+}
+
+
+static int atir_init_start(void)
+{
+ pci_addr_lin = ioremap(pci_addr_phys + DATA_PCI_OFF, 0x400);
+ if (pci_addr_lin == 0) {
+ printk(KERN_INFO DRIVER_NAME ": pci mem must be mapped\n");
+ return 0;
+ }
+ return 1;
+}
+
+static void cycle_delay(int cycle)
+{
+ udelay(WAIT_CYCLE*cycle);
+}
+
+
+static int poll_main()
+{
+ unsigned char status_high, status_low;
+
+ do_i2c_start();
+
+ seems_wr_byte(0xAA);
+ seems_wr_byte(0x01);
+
+ do_i2c_start();
+
+ seems_wr_byte(0xAB);
+
+ status_low = seems_rd_byte();
+ status_high = seems_rd_byte();
+
+ do_i2c_stop();
+
+ return (status_high << 8) | status_low;
+}
+
+static void do_i2c_start(void)
+{
+ do_set_bits(3);
+ cycle_delay(4);
+
+ do_set_bits(1);
+ cycle_delay(7);
+
+ do_set_bits(0);
+ cycle_delay(2);
+}
+
+static void do_i2c_stop(void)
+{
+ unsigned char bits;
+ bits = do_get_bits() & 0xFD;
+ do_set_bits(bits);
+ cycle_delay(1);
+
+ bits |= 1;
+ do_set_bits(bits);
+ cycle_delay(2);
+
+ bits |= 2;
+ do_set_bits(bits);
+ bits = 3;
+ do_set_bits(bits);
+ cycle_delay(2);
+}
+
+static void seems_wr_byte(unsigned char value)
+{
+ int i;
+ unsigned char reg;
+
+ reg = do_get_bits();
+ for (i = 0; i < 8; i++) {
+ if (value & 0x80)
+ reg |= 0x02;
+ else
+ reg &= 0xFD;
+
+ do_set_bits(reg);
+ cycle_delay(1);
+
+ reg |= 1;
+ do_set_bits(reg);
+ cycle_delay(1);
+
+ reg &= 0xFE;
+ do_set_bits(reg);
+ cycle_delay(1);
+ value <<= 1;
+ }
+ cycle_delay(2);
+
+ reg |= 2;
+ do_set_bits(reg);
+
+ reg |= 1;
+ do_set_bits(reg);
+
+ cycle_delay(1);
+ do_get_bits();
+
+ reg &= 0xFE;
+ do_set_bits(reg);
+ cycle_delay(3);
+}
+
+static unsigned char seems_rd_byte(void)
+{
+ int i;
+ int rd_byte;
+ unsigned char bits_2, bits_1;
+
+ bits_1 = do_get_bits() | 2;
+ do_set_bits(bits_1);
+
+ rd_byte = 0;
+ for (i = 0; i < 8; i++) {
+ bits_1 &= 0xFE;
+ do_set_bits(bits_1);
+ cycle_delay(2);
+
+ bits_1 |= 1;
+ do_set_bits(bits_1);
+ cycle_delay(1);
+
+ bits_2 = do_get_bits();
+ if (bits_2 & 2)
+ rd_byte |= 1;
+
+ rd_byte <<= 1;
+ }
+
+ bits_1 = 0;
+ if (bits_2 == 0)
+ bits_1 |= 2;
+
+ do_set_bits(bits_1);
+ cycle_delay(2);
+
+ bits_1 |= 1;
+ do_set_bits(bits_1);
+ cycle_delay(3);
+
+ bits_1 &= 0xFE;
+ do_set_bits(bits_1);
+ cycle_delay(2);
+
+ rd_byte >>= 1;
+ rd_byte &= 0xFF;
+ return rd_byte;
+}
+
+static void do_set_bits(unsigned char new_bits)
+{
+ int reg_val;
+ reg_val = read_index(0x34);
+ if (new_bits & 2) {
+ reg_val &= 0xFFFFFFDF;
+ reg_val |= 1;
+ } else {
+ reg_val &= 0xFFFFFFFE;
+ reg_val |= 0x20;
+ }
+ reg_val |= 0x10;
+ write_index(0x34, reg_val);
+
+ reg_val = read_index(0x31);
+ if (new_bits & 1)
+ reg_val |= 0x1000000;
+ else
+ reg_val &= 0xFEFFFFFF;
+
+ reg_val |= 0x8000000;
+ write_index(0x31, reg_val);
+}
+
+static unsigned char do_get_bits(void)
+{
+ unsigned char bits;
+ int reg_val;
+
+ reg_val = read_index(0x34);
+ reg_val |= 0x10;
+ reg_val &= 0xFFFFFFDF;
+ write_index(0x34, reg_val);
+
+ reg_val = read_index(0x34);
+ bits = 0;
+ if (reg_val & 8)
+ bits |= 2;
+ else
+ bits &= 0xFD;
+
+ reg_val = read_index(0x31);
+ if (reg_val & 0x1000000)
+ bits |= 1;
+ else
+ bits &= 0xFE;
+
+ return bits;
+}
+
+static unsigned int read_index(unsigned char index)
+{
+ unsigned char *addr;
+ unsigned int value;
+ /* addr = pci_addr_lin + DATA_PCI_OFF + ((index & 0xFF) << 2); */
+ addr = pci_addr_lin + ((index & 0xFF) << 2);
+ value = readl(addr);
+ return value;
+}
+
+static void write_index(unsigned char index, unsigned int reg_val)
+{
+ unsigned char *addr;
+ addr = pci_addr_lin + ((index & 0xFF) << 2);
+ writel(reg_val, addr);
+}
+
+MODULE_AUTHOR("Froenchenko Leonid");
+MODULE_DESCRIPTION("IR remote driver for bt829 based TV cards");
+MODULE_LICENSE("GPL");
+
+module_param(debug, bool, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(debug, "Debug enabled or not");
projects / linux-beck.git / commitdiff