Nick Kossifidis | c6e387a | 2008-08-29 22:45:39 +0300 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2004-2008 Reyk Floeter <reyk@openbsd.org> |
| 3 | * Copyright (c) 2006-2008 Nick Kossifidis <mickflemm@gmail.com> |
| 4 | * |
| 5 | * Permission to use, copy, modify, and distribute this software for any |
| 6 | * purpose with or without fee is hereby granted, provided that the above |
| 7 | * copyright notice and this permission notice appear in all copies. |
| 8 | * |
| 9 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
| 10 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
| 11 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
| 12 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| 13 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
| 14 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
| 15 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| 16 | * |
| 17 | */ |
| 18 | |
| 19 | /****************\ |
| 20 | GPIO Functions |
| 21 | \****************/ |
| 22 | |
| 23 | #include "ath5k.h" |
| 24 | #include "reg.h" |
| 25 | #include "debug.h" |
Nick Kossifidis | c6e387a | 2008-08-29 22:45:39 +0300 | [diff] [blame] | 26 | |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame] | 27 | |
| 28 | /** |
| 29 | * DOC: GPIO/LED functions |
| 30 | * |
| 31 | * Here we control the 6 bidirectional GPIO pins provided by the hw. |
| 32 | * We can set a GPIO pin to be an input or an output pin on GPIO control |
| 33 | * register and then read or set its status from GPIO data input/output |
| 34 | * registers. |
| 35 | * |
| 36 | * We also control the two LED pins provided by the hw, LED_0 is our |
| 37 | * "power" LED and LED_1 is our "network activity" LED but many scenarios |
| 38 | * are available from hw. Vendors might also provide LEDs connected to the |
| 39 | * GPIO pins, we handle them through the LED subsystem on led.c |
Nick Kossifidis | c6e387a | 2008-08-29 22:45:39 +0300 | [diff] [blame] | 40 | */ |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame] | 41 | |
| 42 | |
| 43 | /** |
| 44 | * ath5k_hw_set_ledstate() - Set led state |
| 45 | * @ah: The &struct ath5k_hw |
| 46 | * @state: One of AR5K_LED_* |
| 47 | * |
| 48 | * Used to set the LED blinking state. This only |
| 49 | * works for the LED connected to the LED_0, LED_1 pins, |
| 50 | * not the GPIO based. |
| 51 | */ |
| 52 | void |
| 53 | ath5k_hw_set_ledstate(struct ath5k_hw *ah, unsigned int state) |
Nick Kossifidis | c6e387a | 2008-08-29 22:45:39 +0300 | [diff] [blame] | 54 | { |
| 55 | u32 led; |
| 56 | /*5210 has different led mode handling*/ |
| 57 | u32 led_5210; |
| 58 | |
Nick Kossifidis | c6e387a | 2008-08-29 22:45:39 +0300 | [diff] [blame] | 59 | /*Reset led status*/ |
| 60 | if (ah->ah_version != AR5K_AR5210) |
| 61 | AR5K_REG_DISABLE_BITS(ah, AR5K_PCICFG, |
| 62 | AR5K_PCICFG_LEDMODE | AR5K_PCICFG_LED); |
| 63 | else |
| 64 | AR5K_REG_DISABLE_BITS(ah, AR5K_PCICFG, AR5K_PCICFG_LED); |
| 65 | |
| 66 | /* |
| 67 | * Some blinking values, define at your wish |
| 68 | */ |
| 69 | switch (state) { |
| 70 | case AR5K_LED_SCAN: |
| 71 | case AR5K_LED_AUTH: |
| 72 | led = AR5K_PCICFG_LEDMODE_PROP | AR5K_PCICFG_LED_PEND; |
| 73 | led_5210 = AR5K_PCICFG_LED_PEND | AR5K_PCICFG_LED_BCTL; |
| 74 | break; |
| 75 | |
| 76 | case AR5K_LED_INIT: |
| 77 | led = AR5K_PCICFG_LEDMODE_PROP | AR5K_PCICFG_LED_NONE; |
| 78 | led_5210 = AR5K_PCICFG_LED_PEND; |
| 79 | break; |
| 80 | |
| 81 | case AR5K_LED_ASSOC: |
| 82 | case AR5K_LED_RUN: |
| 83 | led = AR5K_PCICFG_LEDMODE_PROP | AR5K_PCICFG_LED_ASSOC; |
| 84 | led_5210 = AR5K_PCICFG_LED_ASSOC; |
| 85 | break; |
| 86 | |
| 87 | default: |
| 88 | led = AR5K_PCICFG_LEDMODE_PROM | AR5K_PCICFG_LED_NONE; |
| 89 | led_5210 = AR5K_PCICFG_LED_PEND; |
| 90 | break; |
| 91 | } |
| 92 | |
| 93 | /*Write new status to the register*/ |
| 94 | if (ah->ah_version != AR5K_AR5210) |
| 95 | AR5K_REG_ENABLE_BITS(ah, AR5K_PCICFG, led); |
| 96 | else |
| 97 | AR5K_REG_ENABLE_BITS(ah, AR5K_PCICFG, led_5210); |
| 98 | } |
| 99 | |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame] | 100 | /** |
| 101 | * ath5k_hw_set_gpio_input() - Set GPIO inputs |
| 102 | * @ah: The &struct ath5k_hw |
| 103 | * @gpio: GPIO pin to set as input |
Nick Kossifidis | c6e387a | 2008-08-29 22:45:39 +0300 | [diff] [blame] | 104 | */ |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame] | 105 | int |
| 106 | ath5k_hw_set_gpio_input(struct ath5k_hw *ah, u32 gpio) |
Nick Kossifidis | c6e387a | 2008-08-29 22:45:39 +0300 | [diff] [blame] | 107 | { |
Bob Copeland | 7d969204 | 2009-01-01 15:01:45 -0500 | [diff] [blame] | 108 | if (gpio >= AR5K_NUM_GPIO) |
Nick Kossifidis | c6e387a | 2008-08-29 22:45:39 +0300 | [diff] [blame] | 109 | return -EINVAL; |
| 110 | |
| 111 | ath5k_hw_reg_write(ah, |
| 112 | (ath5k_hw_reg_read(ah, AR5K_GPIOCR) & ~AR5K_GPIOCR_OUT(gpio)) |
| 113 | | AR5K_GPIOCR_IN(gpio), AR5K_GPIOCR); |
| 114 | |
| 115 | return 0; |
| 116 | } |
| 117 | |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame] | 118 | /** |
| 119 | * ath5k_hw_set_gpio_output() - Set GPIO outputs |
| 120 | * @ah: The &struct ath5k_hw |
| 121 | * @gpio: The GPIO pin to set as output |
Nick Kossifidis | c6e387a | 2008-08-29 22:45:39 +0300 | [diff] [blame] | 122 | */ |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame] | 123 | int |
| 124 | ath5k_hw_set_gpio_output(struct ath5k_hw *ah, u32 gpio) |
Nick Kossifidis | c6e387a | 2008-08-29 22:45:39 +0300 | [diff] [blame] | 125 | { |
Bob Copeland | 7d969204 | 2009-01-01 15:01:45 -0500 | [diff] [blame] | 126 | if (gpio >= AR5K_NUM_GPIO) |
Nick Kossifidis | c6e387a | 2008-08-29 22:45:39 +0300 | [diff] [blame] | 127 | return -EINVAL; |
| 128 | |
| 129 | ath5k_hw_reg_write(ah, |
| 130 | (ath5k_hw_reg_read(ah, AR5K_GPIOCR) & ~AR5K_GPIOCR_OUT(gpio)) |
| 131 | | AR5K_GPIOCR_OUT(gpio), AR5K_GPIOCR); |
| 132 | |
| 133 | return 0; |
| 134 | } |
| 135 | |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame] | 136 | /** |
| 137 | * ath5k_hw_get_gpio() - Get GPIO state |
| 138 | * @ah: The &struct ath5k_hw |
| 139 | * @gpio: The GPIO pin to read |
Nick Kossifidis | c6e387a | 2008-08-29 22:45:39 +0300 | [diff] [blame] | 140 | */ |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame] | 141 | u32 |
| 142 | ath5k_hw_get_gpio(struct ath5k_hw *ah, u32 gpio) |
Nick Kossifidis | c6e387a | 2008-08-29 22:45:39 +0300 | [diff] [blame] | 143 | { |
Bob Copeland | 7d969204 | 2009-01-01 15:01:45 -0500 | [diff] [blame] | 144 | if (gpio >= AR5K_NUM_GPIO) |
Nick Kossifidis | c6e387a | 2008-08-29 22:45:39 +0300 | [diff] [blame] | 145 | return 0xffffffff; |
| 146 | |
| 147 | /* GPIO input magic */ |
| 148 | return ((ath5k_hw_reg_read(ah, AR5K_GPIODI) & AR5K_GPIODI_M) >> gpio) & |
| 149 | 0x1; |
| 150 | } |
| 151 | |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame] | 152 | /** |
| 153 | * ath5k_hw_set_gpio() - Set GPIO state |
| 154 | * @ah: The &struct ath5k_hw |
| 155 | * @gpio: The GPIO pin to set |
| 156 | * @val: Value to set (boolean) |
Nick Kossifidis | c6e387a | 2008-08-29 22:45:39 +0300 | [diff] [blame] | 157 | */ |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame] | 158 | int |
| 159 | ath5k_hw_set_gpio(struct ath5k_hw *ah, u32 gpio, u32 val) |
Nick Kossifidis | c6e387a | 2008-08-29 22:45:39 +0300 | [diff] [blame] | 160 | { |
| 161 | u32 data; |
Nick Kossifidis | c6e387a | 2008-08-29 22:45:39 +0300 | [diff] [blame] | 162 | |
Bob Copeland | 7d969204 | 2009-01-01 15:01:45 -0500 | [diff] [blame] | 163 | if (gpio >= AR5K_NUM_GPIO) |
Nick Kossifidis | c6e387a | 2008-08-29 22:45:39 +0300 | [diff] [blame] | 164 | return -EINVAL; |
| 165 | |
| 166 | /* GPIO output magic */ |
| 167 | data = ath5k_hw_reg_read(ah, AR5K_GPIODO); |
| 168 | |
| 169 | data &= ~(1 << gpio); |
| 170 | data |= (val & 1) << gpio; |
| 171 | |
| 172 | ath5k_hw_reg_write(ah, data, AR5K_GPIODO); |
| 173 | |
| 174 | return 0; |
| 175 | } |
| 176 | |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame] | 177 | /** |
| 178 | * ath5k_hw_set_gpio_intr() - Initialize the GPIO interrupt (RFKill switch) |
| 179 | * @ah: The &struct ath5k_hw |
| 180 | * @gpio: The GPIO pin to use |
| 181 | * @interrupt_level: True to generate interrupt on active pin (high) |
| 182 | * |
| 183 | * This function is used to set up the GPIO interrupt for the hw RFKill switch. |
| 184 | * That switch is connected to a GPIO pin and it's number is stored on EEPROM. |
| 185 | * It can either open or close the circuit to indicate that we should disable |
| 186 | * RF/Wireless to save power (we also get that from EEPROM). |
Nick Kossifidis | c6e387a | 2008-08-29 22:45:39 +0300 | [diff] [blame] | 187 | */ |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame] | 188 | void |
| 189 | ath5k_hw_set_gpio_intr(struct ath5k_hw *ah, unsigned int gpio, |
Nick Kossifidis | c6e387a | 2008-08-29 22:45:39 +0300 | [diff] [blame] | 190 | u32 interrupt_level) |
| 191 | { |
| 192 | u32 data; |
| 193 | |
Bob Copeland | 7d969204 | 2009-01-01 15:01:45 -0500 | [diff] [blame] | 194 | if (gpio >= AR5K_NUM_GPIO) |
Nick Kossifidis | c6e387a | 2008-08-29 22:45:39 +0300 | [diff] [blame] | 195 | return; |
| 196 | |
| 197 | /* |
| 198 | * Set the GPIO interrupt |
| 199 | */ |
| 200 | data = (ath5k_hw_reg_read(ah, AR5K_GPIOCR) & |
| 201 | ~(AR5K_GPIOCR_INT_SEL(gpio) | AR5K_GPIOCR_INT_SELH | |
| 202 | AR5K_GPIOCR_INT_ENA | AR5K_GPIOCR_OUT(gpio))) | |
| 203 | (AR5K_GPIOCR_INT_SEL(gpio) | AR5K_GPIOCR_INT_ENA); |
| 204 | |
| 205 | ath5k_hw_reg_write(ah, interrupt_level ? data : |
| 206 | (data | AR5K_GPIOCR_INT_SELH), AR5K_GPIOCR); |
| 207 | |
| 208 | ah->ah_imr |= AR5K_IMR_GPIO; |
| 209 | |
| 210 | /* Enable GPIO interrupts */ |
| 211 | AR5K_REG_ENABLE_BITS(ah, AR5K_PIMR, AR5K_IMR_GPIO); |
| 212 | } |
| 213 | |