Stefan Reinauer | d8a5fd2 | 2012-12-11 15:51:47 -0800 | [diff] [blame] | 1 | /* |
| 2 | * This file is part of the coreboot project. |
| 3 | * |
| 4 | * Copyright (C) 2012 The Chromium OS Authors. All rights reserved. |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU General Public License as |
| 8 | * published by the Free Software Foundation; version 2 of |
| 9 | * the License. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, |
| 19 | * MA 02110-1301 USA |
| 20 | */ |
| 21 | |
| 22 | #ifndef __PRE_RAM__ |
| 23 | |
| 24 | #include <console/console.h> |
| 25 | #include <device/device.h> |
| 26 | #include <device/pnp.h> |
| 27 | #include <stdlib.h> |
| 28 | #include <arch/io.h> |
| 29 | #include <delay.h> |
| 30 | #include "ec.h" |
| 31 | #include "chip.h" |
| 32 | |
| 33 | /* kbc helper functions from drivers/pc80/keyboard.c. TODO: share functions. */ |
| 34 | static int kbc_input_buffer_empty(void) |
| 35 | { |
| 36 | u32 timeout; |
| 37 | for(timeout = KBC_TIMEOUT_IN_MS; timeout && (inb(KBD_STATUS) & KBD_IBF); |
| 38 | timeout--) { |
| 39 | mdelay(1); |
| 40 | } |
| 41 | |
| 42 | if (!timeout) { |
| 43 | printk(BIOS_WARNING, |
| 44 | "Unexpected Keyboard controller input buffer full\n"); |
| 45 | } |
| 46 | return !!timeout; |
| 47 | } |
| 48 | |
| 49 | |
| 50 | static int kbc_output_buffer_full(void) |
| 51 | { |
| 52 | u32 timeout; |
| 53 | for(timeout = KBC_TIMEOUT_IN_MS; timeout && ((inb(KBD_STATUS) |
| 54 | & KBD_OBF) == 0); timeout--) { |
| 55 | mdelay(1); |
| 56 | } |
| 57 | |
| 58 | if (!timeout) { |
| 59 | printk(BIOS_INFO, "Keyboard controller output buffer result timeout\n"); |
| 60 | } |
| 61 | return !!timeout; |
| 62 | } |
| 63 | |
| 64 | int kbc_cleanup_buffers(void) |
| 65 | { |
| 66 | u32 timeout; |
| 67 | for(timeout = KBC_TIMEOUT_IN_MS; timeout && (inb(KBD_STATUS) |
| 68 | & (KBD_OBF | KBD_IBF)); timeout--) { |
| 69 | mdelay(1); |
| 70 | inb(KBD_DATA); |
| 71 | } |
| 72 | |
| 73 | if (!timeout) { |
| 74 | printk(BIOS_ERR, "Couldn't cleanup the keyboard controller buffers\n"); |
| 75 | printk(BIOS_ERR, "Status (0x%x): 0x%x, Buffer (0x%x): 0x%x\n", |
| 76 | KBD_STATUS, inb(KBD_STATUS), KBD_DATA, inb(KBD_DATA)); |
| 77 | } |
| 78 | |
| 79 | return !!timeout; |
| 80 | } |
| 81 | |
| 82 | |
Martin Roth | 8940d3e | 2013-07-09 21:52:41 -0600 | [diff] [blame^] | 83 | /* The ENE 60/64 EC registers are the same command/status IB/OB KBC pair. |
Stefan Reinauer | d8a5fd2 | 2012-12-11 15:51:47 -0800 | [diff] [blame] | 84 | * Check status from 64 port before each command. |
| 85 | * |
| 86 | * Ex. Get panel ID command C43/D77 |
| 87 | * Check IBF empty. Then Write 0x43(CMD) to 0x64 Port |
| 88 | * Check IBF empty. Then Write 0x77(DATA) to 0x60 Port |
| 89 | * Check OBF set. Then Get Data(0x03:panel ID) from 0x60 |
Martin Roth | 8940d3e | 2013-07-09 21:52:41 -0600 | [diff] [blame^] | 90 | * Different commands return may or may not respond and may have multiple |
Stefan Reinauer | d8a5fd2 | 2012-12-11 15:51:47 -0800 | [diff] [blame] | 91 | * bytes. Keep it simple for nor |
| 92 | */ |
| 93 | |
| 94 | u8 ec_kbc_read_ob(void) |
| 95 | { |
| 96 | if (!kbc_output_buffer_full()) return 0; |
| 97 | return inb(KBD_DATA); |
| 98 | } |
| 99 | |
| 100 | void ec_kbc_write_cmd(u8 cmd) |
| 101 | { |
| 102 | if (!kbc_input_buffer_empty()) return; |
| 103 | outb(cmd, KBD_COMMAND); |
| 104 | } |
| 105 | |
| 106 | void ec_kbc_write_ib(u8 data) |
| 107 | { |
| 108 | if (!kbc_input_buffer_empty()) return; |
| 109 | outb(data, KBD_DATA); |
| 110 | } |
| 111 | |
| 112 | |
| 113 | /* |
| 114 | * These functions are for accessing the ENE932 device space, but are not |
| 115 | * currently used. |
| 116 | */ |
| 117 | /* |
| 118 | static u8 ec_io_read(u16 addr) |
| 119 | { |
| 120 | outb(addr >> 8, EC_IO_HIGH); |
| 121 | outb(addr & 0xff, EC_IO_LOW); |
| 122 | return inb(EC_IO_DATA); |
| 123 | } |
| 124 | */ |
| 125 | /*static void ec_write(u16 addr, u8 data) |
| 126 | { |
| 127 | outb(addr >> 8, EC_IO_HIGH); |
| 128 | outb(addr & 0xff, EC_IO_LOW; |
| 129 | outb(data, EC_IO_DATA); |
| 130 | } |
| 131 | */ |
| 132 | |
| 133 | #ifndef __SMM__ |
| 134 | static void ene932_init(device_t dev) |
| 135 | { |
| 136 | struct ec_compal_ene932_config *conf = dev->chip_info; |
| 137 | |
| 138 | |
| 139 | if (!dev->enabled) |
| 140 | return; |
| 141 | |
| 142 | printk(BIOS_DEBUG, "Compal ENE932: Initializing keyboard.\n"); |
| 143 | pc_keyboard_init(&conf->keyboard); |
| 144 | |
| 145 | } |
| 146 | |
| 147 | |
| 148 | static void ene932_read_resources(device_t dev) |
| 149 | { |
| 150 | /* This function avoids an error on serial console. */ |
| 151 | } |
| 152 | |
| 153 | |
| 154 | static void ene932_enable_resources(device_t dev) |
| 155 | { |
| 156 | /* This function avoids an error on serial console. */ |
| 157 | } |
| 158 | |
| 159 | static struct device_operations ops = { |
| 160 | .init = ene932_init, |
| 161 | .read_resources = ene932_read_resources, |
| 162 | .enable_resources = ene932_enable_resources |
| 163 | }; |
| 164 | |
| 165 | static struct pnp_info pnp_dev_info[] = { |
| 166 | { &ops, 0, 0, { 0, 0 }, } |
| 167 | }; |
| 168 | |
| 169 | static void enable_dev(device_t dev) |
| 170 | { |
| 171 | pnp_enable_devices(dev, &pnp_ops, ARRAY_SIZE(pnp_dev_info), |
| 172 | pnp_dev_info); |
| 173 | } |
| 174 | |
| 175 | struct chip_operations ec_compal_ene932_ops = { |
| 176 | CHIP_NAME("COMPAL ENE932 EC") |
| 177 | .enable_dev = enable_dev |
| 178 | }; |
| 179 | #endif /* ! __SMM__ */ |
| 180 | #endif /* ! __PRE_RAM__ */ |