| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * IR port driver for the Cirrus Logic EP7211 processor. |
| 3 | * |
| 4 | * Copyright 2001, Blue Mug Inc. All rights reserved. |
| 5 | */ |
| 6 | |
| 7 | #include <linux/module.h> |
| 8 | #include <linux/delay.h> |
| 9 | #include <linux/tty.h> |
| 10 | #include <linux/init.h> |
| 11 | |
| 12 | #include <net/irda/irda.h> |
| 13 | #include <net/irda/irda_device.h> |
| 14 | |
| 15 | #include <asm/io.h> |
| 16 | #include <asm/hardware.h> |
| 17 | |
| 18 | #define MIN_DELAY 25 /* 15 us, but wait a little more to be sure */ |
| 19 | #define MAX_DELAY 10000 /* 1 ms */ |
| 20 | |
| 21 | static void ep7211_ir_open(dongle_t *self, struct qos_info *qos); |
| 22 | static void ep7211_ir_close(dongle_t *self); |
| 23 | static int ep7211_ir_change_speed(struct irda_task *task); |
| 24 | static int ep7211_ir_reset(struct irda_task *task); |
| 25 | |
| 26 | static struct dongle_reg dongle = { |
| 27 | .type = IRDA_EP7211_IR, |
| 28 | .open = ep7211_ir_open, |
| 29 | .close = ep7211_ir_close, |
| 30 | .reset = ep7211_ir_reset, |
| 31 | .change_speed = ep7211_ir_change_speed, |
| 32 | .owner = THIS_MODULE, |
| 33 | }; |
| 34 | |
| 35 | static void ep7211_ir_open(dongle_t *self, struct qos_info *qos) |
| 36 | { |
| 37 | unsigned int syscon1, flags; |
| 38 | |
| 39 | save_flags(flags); cli(); |
| 40 | |
| 41 | /* Turn on the SIR encoder. */ |
| 42 | syscon1 = clps_readl(SYSCON1); |
| 43 | syscon1 |= SYSCON1_SIREN; |
| 44 | clps_writel(syscon1, SYSCON1); |
| 45 | |
| 46 | /* XXX: We should disable modem status interrupts on the first |
| 47 | UART (interrupt #14). */ |
| 48 | |
| 49 | restore_flags(flags); |
| 50 | } |
| 51 | |
| 52 | static void ep7211_ir_close(dongle_t *self) |
| 53 | { |
| 54 | unsigned int syscon1, flags; |
| 55 | |
| 56 | save_flags(flags); cli(); |
| 57 | |
| 58 | /* Turn off the SIR encoder. */ |
| 59 | syscon1 = clps_readl(SYSCON1); |
| 60 | syscon1 &= ~SYSCON1_SIREN; |
| 61 | clps_writel(syscon1, SYSCON1); |
| 62 | |
| 63 | /* XXX: If we've disabled the modem status interrupts, we should |
| 64 | reset them back to their original state. */ |
| 65 | |
| 66 | restore_flags(flags); |
| 67 | } |
| 68 | |
| 69 | /* |
| 70 | * Function ep7211_ir_change_speed (task) |
| 71 | * |
| 72 | * Change speed of the EP7211 I/R port. We don't really have to do anything |
| 73 | * for the EP7211 as long as the rate is being changed at the serial port |
| 74 | * level. |
| 75 | */ |
| 76 | static int ep7211_ir_change_speed(struct irda_task *task) |
| 77 | { |
| 78 | irda_task_next_state(task, IRDA_TASK_DONE); |
| 79 | return 0; |
| 80 | } |
| 81 | |
| 82 | /* |
| 83 | * Function ep7211_ir_reset (task) |
| 84 | * |
| 85 | * Reset the EP7211 I/R. We don't really have to do anything. |
| 86 | * |
| 87 | */ |
| 88 | static int ep7211_ir_reset(struct irda_task *task) |
| 89 | { |
| 90 | irda_task_next_state(task, IRDA_TASK_DONE); |
| 91 | return 0; |
| 92 | } |
| 93 | |
| 94 | /* |
| 95 | * Function ep7211_ir_init(void) |
| 96 | * |
| 97 | * Initialize EP7211 I/R module |
| 98 | * |
| 99 | */ |
| 100 | static int __init ep7211_ir_init(void) |
| 101 | { |
| 102 | return irda_device_register_dongle(&dongle); |
| 103 | } |
| 104 | |
| 105 | /* |
| 106 | * Function ep7211_ir_cleanup(void) |
| 107 | * |
| 108 | * Cleanup EP7211 I/R module |
| 109 | * |
| 110 | */ |
| 111 | static void __exit ep7211_ir_cleanup(void) |
| 112 | { |
| 113 | irda_device_unregister_dongle(&dongle); |
| 114 | } |
| 115 | |
| 116 | MODULE_AUTHOR("Jon McClintock <jonm@bluemug.com>"); |
| 117 | MODULE_DESCRIPTION("EP7211 I/R driver"); |
| 118 | MODULE_LICENSE("GPL"); |
| 119 | MODULE_ALIAS("irda-dongle-8"); /* IRDA_EP7211_IR */ |
| 120 | |
| 121 | module_init(ep7211_ir_init); |
| 122 | module_exit(ep7211_ir_cleanup); |