Tony Lindgren | 1dbae81 | 2005-11-10 14:26:51 +0000 | [diff] [blame] | 1 | /* |
Uwe Zeisberger | f30c226 | 2006-10-03 23:01:26 +0200 | [diff] [blame] | 2 | * arch/arm/mach-omap2/serial.c |
Tony Lindgren | 1dbae81 | 2005-11-10 14:26:51 +0000 | [diff] [blame] | 3 | * |
| 4 | * OMAP2 serial support. |
| 5 | * |
Jouni Hogander | 6e81176 | 2008-10-06 15:49:15 +0300 | [diff] [blame] | 6 | * Copyright (C) 2005-2008 Nokia Corporation |
Tony Lindgren | 1dbae81 | 2005-11-10 14:26:51 +0000 | [diff] [blame] | 7 | * Author: Paul Mundt <paul.mundt@nokia.com> |
| 8 | * |
Kevin Hilman | 4af4016 | 2009-02-04 10:51:40 -0800 | [diff] [blame] | 9 | * Major rework for PM support by Kevin Hilman |
| 10 | * |
Tony Lindgren | 1dbae81 | 2005-11-10 14:26:51 +0000 | [diff] [blame] | 11 | * Based off of arch/arm/mach-omap/omap1/serial.c |
| 12 | * |
Santosh Shilimkar | 4416907 | 2009-05-28 14:16:04 -0700 | [diff] [blame] | 13 | * Copyright (C) 2009 Texas Instruments |
| 14 | * Added OMAP4 support - Santosh Shilimkar <santosh.shilimkar@ti.com |
| 15 | * |
Tony Lindgren | 1dbae81 | 2005-11-10 14:26:51 +0000 | [diff] [blame] | 16 | * This file is subject to the terms and conditions of the GNU General Public |
| 17 | * License. See the file "COPYING" in the main directory of this archive |
| 18 | * for more details. |
| 19 | */ |
| 20 | #include <linux/kernel.h> |
| 21 | #include <linux/init.h> |
Russell King | f8ce254 | 2006-01-07 16:15:52 +0000 | [diff] [blame] | 22 | #include <linux/clk.h> |
Russell King | fced80c | 2008-09-06 12:10:45 +0100 | [diff] [blame] | 23 | #include <linux/io.h> |
Santosh Shilimkar | e03d37d | 2010-02-18 08:59:06 +0000 | [diff] [blame] | 24 | #include <linux/delay.h> |
Kevin Hilman | 6f251e9 | 2010-09-27 20:19:38 +0530 | [diff] [blame] | 25 | #include <linux/platform_device.h> |
| 26 | #include <linux/slab.h> |
Kevin Hilman | 3244fcd | 2010-09-27 20:19:53 +0530 | [diff] [blame] | 27 | #include <linux/pm_runtime.h> |
Paul Walmsley | 0d8e2d0 | 2010-11-24 16:49:05 -0700 | [diff] [blame] | 28 | #include <linux/console.h> |
Kevin Hilman | 6f251e9 | 2010-09-27 20:19:38 +0530 | [diff] [blame] | 29 | |
Kevin Hilman | 6f251e9 | 2010-09-27 20:19:38 +0530 | [diff] [blame] | 30 | #include <plat/omap-serial.h> |
Tony Lindgren | 4e65331 | 2011-11-10 22:45:17 +0100 | [diff] [blame] | 31 | #include "common.h" |
Tony Lindgren | ce491cf | 2009-10-20 09:40:47 -0700 | [diff] [blame] | 32 | #include <plat/board.h> |
Kevin Hilman | 6f251e9 | 2010-09-27 20:19:38 +0530 | [diff] [blame] | 33 | #include <plat/dma.h> |
| 34 | #include <plat/omap_hwmod.h> |
| 35 | #include <plat/omap_device.h> |
Govindraj.R | ec3bebc | 2011-10-11 19:11:27 +0530 | [diff] [blame] | 36 | #include <plat/omap-pm.h> |
Tony Lindgren | 1dbae81 | 2005-11-10 14:26:51 +0000 | [diff] [blame] | 37 | |
Paul Walmsley | 59fb659 | 2010-12-21 15:30:55 -0700 | [diff] [blame] | 38 | #include "prm2xxx_3xxx.h" |
Kevin Hilman | 4af4016 | 2009-02-04 10:51:40 -0800 | [diff] [blame] | 39 | #include "pm.h" |
Paul Walmsley | 59fb659 | 2010-12-21 15:30:55 -0700 | [diff] [blame] | 40 | #include "cm2xxx_3xxx.h" |
Kevin Hilman | 4af4016 | 2009-02-04 10:51:40 -0800 | [diff] [blame] | 41 | #include "prm-regbits-34xx.h" |
Paul Walmsley | 4814ced | 2010-10-08 11:40:20 -0600 | [diff] [blame] | 42 | #include "control.h" |
Tony Lindgren | 40e4439 | 2010-12-22 18:42:35 -0800 | [diff] [blame] | 43 | #include "mux.h" |
Kevin Hilman | 4af4016 | 2009-02-04 10:51:40 -0800 | [diff] [blame] | 44 | |
Tony Lindgren | 301fe8e | 2010-02-01 12:34:31 -0800 | [diff] [blame] | 45 | /* |
| 46 | * NOTE: By default the serial timeout is disabled as it causes lost characters |
| 47 | * over the serial ports. This means that the UART clocks will stay on until |
| 48 | * disabled via sysfs. This also causes that any deeper omap sleep states are |
| 49 | * blocked. |
| 50 | */ |
| 51 | #define DEFAULT_TIMEOUT 0 |
Kevin Hilman | 4af4016 | 2009-02-04 10:51:40 -0800 | [diff] [blame] | 52 | |
Kevin Hilman | 6f251e9 | 2010-09-27 20:19:38 +0530 | [diff] [blame] | 53 | #define MAX_UART_HWMOD_NAME_LEN 16 |
| 54 | |
Kevin Hilman | 4af4016 | 2009-02-04 10:51:40 -0800 | [diff] [blame] | 55 | struct omap_uart_state { |
| 56 | int num; |
| 57 | int can_sleep; |
Kevin Hilman | 4af4016 | 2009-02-04 10:51:40 -0800 | [diff] [blame] | 58 | |
Kevin Hilman | 4af4016 | 2009-02-04 10:51:40 -0800 | [diff] [blame] | 59 | int clocked; |
| 60 | |
Kevin Hilman | 4af4016 | 2009-02-04 10:51:40 -0800 | [diff] [blame] | 61 | struct list_head node; |
Kevin Hilman | 6f251e9 | 2010-09-27 20:19:38 +0530 | [diff] [blame] | 62 | struct omap_hwmod *oh; |
| 63 | struct platform_device *pdev; |
Kevin Hilman | 4af4016 | 2009-02-04 10:51:40 -0800 | [diff] [blame] | 64 | }; |
| 65 | |
Kevin Hilman | 4af4016 | 2009-02-04 10:51:40 -0800 | [diff] [blame] | 66 | static LIST_HEAD(uart_list); |
Kevin Hilman | 6f251e9 | 2010-09-27 20:19:38 +0530 | [diff] [blame] | 67 | static u8 num_uarts; |
Tony Lindgren | 1dbae81 | 2005-11-10 14:26:51 +0000 | [diff] [blame] | 68 | |
Kevin Hilman | 4af4016 | 2009-02-04 10:51:40 -0800 | [diff] [blame] | 69 | static inline void omap_uart_enable_clocks(struct omap_uart_state *uart) |
| 70 | { |
| 71 | if (uart->clocked) |
| 72 | return; |
| 73 | |
Kevin Hilman | 6f251e9 | 2010-09-27 20:19:38 +0530 | [diff] [blame] | 74 | omap_device_enable(uart->pdev); |
Kevin Hilman | 4af4016 | 2009-02-04 10:51:40 -0800 | [diff] [blame] | 75 | uart->clocked = 1; |
| 76 | omap_uart_restore_context(uart); |
| 77 | } |
| 78 | |
| 79 | #ifdef CONFIG_PM |
| 80 | |
| 81 | static inline void omap_uart_disable_clocks(struct omap_uart_state *uart) |
| 82 | { |
| 83 | if (!uart->clocked) |
| 84 | return; |
| 85 | |
| 86 | omap_uart_save_context(uart); |
| 87 | uart->clocked = 0; |
Kevin Hilman | 6f251e9 | 2010-09-27 20:19:38 +0530 | [diff] [blame] | 88 | omap_device_idle(uart->pdev); |
Kevin Hilman | 4af4016 | 2009-02-04 10:51:40 -0800 | [diff] [blame] | 89 | } |
| 90 | |
Kevin Hilman | 4af4016 | 2009-02-04 10:51:40 -0800 | [diff] [blame] | 91 | static void omap_uart_block_sleep(struct omap_uart_state *uart) |
| 92 | { |
| 93 | omap_uart_enable_clocks(uart); |
| 94 | |
| 95 | omap_uart_smart_idle_enable(uart, 0); |
| 96 | uart->can_sleep = 0; |
Kevin Hilman | 4af4016 | 2009-02-04 10:51:40 -0800 | [diff] [blame] | 97 | } |
| 98 | |
Kevin Hilman | 4af4016 | 2009-02-04 10:51:40 -0800 | [diff] [blame] | 99 | int omap_uart_can_sleep(void) |
| 100 | { |
| 101 | struct omap_uart_state *uart; |
| 102 | int can_sleep = 1; |
| 103 | |
| 104 | list_for_each_entry(uart, &uart_list, node) { |
| 105 | if (!uart->clocked) |
| 106 | continue; |
| 107 | |
| 108 | if (!uart->can_sleep) { |
| 109 | can_sleep = 0; |
| 110 | continue; |
| 111 | } |
| 112 | |
| 113 | /* This UART can now safely sleep. */ |
| 114 | omap_uart_allow_sleep(uart); |
| 115 | } |
| 116 | |
| 117 | return can_sleep; |
| 118 | } |
| 119 | |
Govindraj.R | 62f3ec5 | 2011-10-13 14:11:09 +0530 | [diff] [blame^] | 120 | static void omap_uart_enable_wakeup(struct platform_device *pdev, bool enable) |
Kevin Hilman | 4af4016 | 2009-02-04 10:51:40 -0800 | [diff] [blame] | 121 | { |
Govindraj.R | 62f3ec5 | 2011-10-13 14:11:09 +0530 | [diff] [blame^] | 122 | struct omap_device *od = to_omap_device(pdev); |
Kevin Hilman | 4af4016 | 2009-02-04 10:51:40 -0800 | [diff] [blame] | 123 | |
Govindraj.R | 62f3ec5 | 2011-10-13 14:11:09 +0530 | [diff] [blame^] | 124 | if (!od) |
| 125 | return; |
Kevin Hilman | 4af4016 | 2009-02-04 10:51:40 -0800 | [diff] [blame] | 126 | |
Govindraj.R | 62f3ec5 | 2011-10-13 14:11:09 +0530 | [diff] [blame^] | 127 | if (enable) |
| 128 | omap_hwmod_enable_wakeup(od->hwmods[0]); |
| 129 | else |
| 130 | omap_hwmod_disable_wakeup(od->hwmods[0]); |
Kevin Hilman | 4af4016 | 2009-02-04 10:51:40 -0800 | [diff] [blame] | 131 | } |
| 132 | |
Govindraj.R | 9473474 | 2011-11-07 19:00:33 +0530 | [diff] [blame] | 133 | /* |
| 134 | * Errata i291: [UART]:Cannot Acknowledge Idle Requests |
| 135 | * in Smartidle Mode When Configured for DMA Operations. |
| 136 | * WA: configure uart in force idle mode. |
| 137 | */ |
| 138 | static void omap_uart_set_noidle(struct platform_device *pdev) |
| 139 | { |
| 140 | struct omap_device *od = to_omap_device(pdev); |
| 141 | |
| 142 | omap_hwmod_set_slave_idlemode(od->hwmods[0], HWMOD_IDLEMODE_NO); |
| 143 | } |
| 144 | |
| 145 | static void omap_uart_set_forceidle(struct platform_device *pdev) |
| 146 | { |
| 147 | struct omap_device *od = to_omap_device(pdev); |
| 148 | |
| 149 | omap_hwmod_set_slave_idlemode(od->hwmods[0], HWMOD_IDLEMODE_FORCE); |
| 150 | } |
| 151 | |
Kevin Hilman | 4af4016 | 2009-02-04 10:51:40 -0800 | [diff] [blame] | 152 | #else |
Govindraj.R | 62f3ec5 | 2011-10-13 14:11:09 +0530 | [diff] [blame^] | 153 | static void omap_uart_enable_wakeup(struct platform_device *pdev, bool enable) |
| 154 | {} |
Govindraj.R | 9473474 | 2011-11-07 19:00:33 +0530 | [diff] [blame] | 155 | static void omap_uart_set_noidle(struct platform_device *pdev) {} |
| 156 | static void omap_uart_set_forceidle(struct platform_device *pdev) {} |
Santosh Shilimkar | a1b04cc | 2010-10-11 11:05:18 +0000 | [diff] [blame] | 157 | static void omap_uart_block_sleep(struct omap_uart_state *uart) |
| 158 | { |
| 159 | /* Needed to enable UART clocks when built without CONFIG_PM */ |
| 160 | omap_uart_enable_clocks(uart); |
| 161 | } |
Kevin Hilman | 4af4016 | 2009-02-04 10:51:40 -0800 | [diff] [blame] | 162 | #endif /* CONFIG_PM */ |
| 163 | |
Govindraj.R | 7496ba3 | 2011-11-07 18:55:05 +0530 | [diff] [blame] | 164 | #ifdef CONFIG_OMAP_MUX |
| 165 | static struct omap_device_pad default_uart1_pads[] __initdata = { |
| 166 | { |
| 167 | .name = "uart1_cts.uart1_cts", |
| 168 | .enable = OMAP_PIN_INPUT_PULLUP | OMAP_MUX_MODE0, |
| 169 | }, |
| 170 | { |
| 171 | .name = "uart1_rts.uart1_rts", |
| 172 | .enable = OMAP_PIN_OUTPUT | OMAP_MUX_MODE0, |
| 173 | }, |
| 174 | { |
| 175 | .name = "uart1_tx.uart1_tx", |
| 176 | .enable = OMAP_PIN_OUTPUT | OMAP_MUX_MODE0, |
| 177 | }, |
| 178 | { |
| 179 | .name = "uart1_rx.uart1_rx", |
| 180 | .flags = OMAP_DEVICE_PAD_REMUX | OMAP_DEVICE_PAD_WAKEUP, |
| 181 | .enable = OMAP_PIN_INPUT_PULLUP | OMAP_MUX_MODE0, |
| 182 | .idle = OMAP_PIN_INPUT_PULLUP | OMAP_MUX_MODE0, |
| 183 | }, |
| 184 | }; |
| 185 | |
| 186 | static struct omap_device_pad default_uart2_pads[] __initdata = { |
| 187 | { |
| 188 | .name = "uart2_cts.uart2_cts", |
| 189 | .enable = OMAP_PIN_INPUT_PULLUP | OMAP_MUX_MODE0, |
| 190 | }, |
| 191 | { |
| 192 | .name = "uart2_rts.uart2_rts", |
| 193 | .enable = OMAP_PIN_OUTPUT | OMAP_MUX_MODE0, |
| 194 | }, |
| 195 | { |
| 196 | .name = "uart2_tx.uart2_tx", |
| 197 | .enable = OMAP_PIN_OUTPUT | OMAP_MUX_MODE0, |
| 198 | }, |
| 199 | { |
| 200 | .name = "uart2_rx.uart2_rx", |
| 201 | .flags = OMAP_DEVICE_PAD_REMUX | OMAP_DEVICE_PAD_WAKEUP, |
| 202 | .enable = OMAP_PIN_INPUT_PULLUP | OMAP_MUX_MODE0, |
| 203 | .idle = OMAP_PIN_INPUT_PULLUP | OMAP_MUX_MODE0, |
| 204 | }, |
| 205 | }; |
| 206 | |
| 207 | static struct omap_device_pad default_uart3_pads[] __initdata = { |
| 208 | { |
| 209 | .name = "uart3_cts_rctx.uart3_cts_rctx", |
| 210 | .enable = OMAP_PIN_INPUT_PULLUP | OMAP_MUX_MODE0, |
| 211 | }, |
| 212 | { |
| 213 | .name = "uart3_rts_sd.uart3_rts_sd", |
| 214 | .enable = OMAP_PIN_OUTPUT | OMAP_MUX_MODE0, |
| 215 | }, |
| 216 | { |
| 217 | .name = "uart3_tx_irtx.uart3_tx_irtx", |
| 218 | .enable = OMAP_PIN_OUTPUT | OMAP_MUX_MODE0, |
| 219 | }, |
| 220 | { |
| 221 | .name = "uart3_rx_irrx.uart3_rx_irrx", |
| 222 | .flags = OMAP_DEVICE_PAD_REMUX | OMAP_DEVICE_PAD_WAKEUP, |
| 223 | .enable = OMAP_PIN_INPUT | OMAP_MUX_MODE0, |
| 224 | .idle = OMAP_PIN_INPUT | OMAP_MUX_MODE0, |
| 225 | }, |
| 226 | }; |
| 227 | |
| 228 | static struct omap_device_pad default_omap36xx_uart4_pads[] __initdata = { |
| 229 | { |
| 230 | .name = "gpmc_wait2.uart4_tx", |
| 231 | .enable = OMAP_PIN_OUTPUT | OMAP_MUX_MODE0, |
| 232 | }, |
| 233 | { |
| 234 | .name = "gpmc_wait3.uart4_rx", |
| 235 | .flags = OMAP_DEVICE_PAD_REMUX | OMAP_DEVICE_PAD_WAKEUP, |
| 236 | .enable = OMAP_PIN_INPUT | OMAP_MUX_MODE2, |
| 237 | .idle = OMAP_PIN_INPUT | OMAP_MUX_MODE2, |
| 238 | }, |
| 239 | }; |
| 240 | |
| 241 | static struct omap_device_pad default_omap4_uart4_pads[] __initdata = { |
| 242 | { |
| 243 | .name = "uart4_tx.uart4_tx", |
| 244 | .enable = OMAP_PIN_OUTPUT | OMAP_MUX_MODE0, |
| 245 | }, |
| 246 | { |
| 247 | .name = "uart4_rx.uart4_rx", |
| 248 | .flags = OMAP_DEVICE_PAD_REMUX | OMAP_DEVICE_PAD_WAKEUP, |
| 249 | .enable = OMAP_PIN_INPUT | OMAP_MUX_MODE0, |
| 250 | .idle = OMAP_PIN_INPUT | OMAP_MUX_MODE0, |
| 251 | }, |
| 252 | }; |
| 253 | |
| 254 | static void omap_serial_fill_default_pads(struct omap_board_data *bdata) |
| 255 | { |
| 256 | switch (bdata->id) { |
| 257 | case 0: |
| 258 | bdata->pads = default_uart1_pads; |
| 259 | bdata->pads_cnt = ARRAY_SIZE(default_uart1_pads); |
| 260 | break; |
| 261 | case 1: |
| 262 | bdata->pads = default_uart2_pads; |
| 263 | bdata->pads_cnt = ARRAY_SIZE(default_uart2_pads); |
| 264 | break; |
| 265 | case 2: |
| 266 | bdata->pads = default_uart3_pads; |
| 267 | bdata->pads_cnt = ARRAY_SIZE(default_uart3_pads); |
| 268 | break; |
| 269 | case 3: |
| 270 | if (cpu_is_omap44xx()) { |
| 271 | bdata->pads = default_omap4_uart4_pads; |
| 272 | bdata->pads_cnt = |
| 273 | ARRAY_SIZE(default_omap4_uart4_pads); |
| 274 | } else if (cpu_is_omap3630()) { |
| 275 | bdata->pads = default_omap36xx_uart4_pads; |
| 276 | bdata->pads_cnt = |
| 277 | ARRAY_SIZE(default_omap36xx_uart4_pads); |
| 278 | } |
| 279 | break; |
| 280 | default: |
| 281 | break; |
| 282 | } |
| 283 | } |
| 284 | #else |
| 285 | static void omap_serial_fill_default_pads(struct omap_board_data *bdata) {} |
| 286 | #endif |
| 287 | |
Tony Lindgren | 3e16f92 | 2011-02-14 15:40:20 -0800 | [diff] [blame] | 288 | static int __init omap_serial_early_init(void) |
Tony Lindgren | 1dbae81 | 2005-11-10 14:26:51 +0000 | [diff] [blame] | 289 | { |
Kevin Hilman | 6f251e9 | 2010-09-27 20:19:38 +0530 | [diff] [blame] | 290 | int i = 0; |
Tony Lindgren | 1dbae81 | 2005-11-10 14:26:51 +0000 | [diff] [blame] | 291 | |
Kevin Hilman | 6f251e9 | 2010-09-27 20:19:38 +0530 | [diff] [blame] | 292 | do { |
| 293 | char oh_name[MAX_UART_HWMOD_NAME_LEN]; |
| 294 | struct omap_hwmod *oh; |
| 295 | struct omap_uart_state *uart; |
Thomas Weber | 21b9034 | 2010-02-25 09:40:19 +0000 | [diff] [blame] | 296 | |
Kevin Hilman | 6f251e9 | 2010-09-27 20:19:38 +0530 | [diff] [blame] | 297 | snprintf(oh_name, MAX_UART_HWMOD_NAME_LEN, |
| 298 | "uart%d", i + 1); |
| 299 | oh = omap_hwmod_lookup(oh_name); |
| 300 | if (!oh) |
| 301 | break; |
Tony Lindgren | 1dbae81 | 2005-11-10 14:26:51 +0000 | [diff] [blame] | 302 | |
Kevin Hilman | 6f251e9 | 2010-09-27 20:19:38 +0530 | [diff] [blame] | 303 | uart = kzalloc(sizeof(struct omap_uart_state), GFP_KERNEL); |
| 304 | if (WARN_ON(!uart)) |
Tony Lindgren | 3e16f92 | 2011-02-14 15:40:20 -0800 | [diff] [blame] | 305 | return -ENODEV; |
Tony Lindgren | 1dbae81 | 2005-11-10 14:26:51 +0000 | [diff] [blame] | 306 | |
Kevin Hilman | 6f251e9 | 2010-09-27 20:19:38 +0530 | [diff] [blame] | 307 | uart->oh = oh; |
| 308 | uart->num = i++; |
| 309 | list_add_tail(&uart->node, &uart_list); |
| 310 | num_uarts++; |
| 311 | |
Tony Lindgren | 84f90c9 | 2009-10-16 09:53:00 -0700 | [diff] [blame] | 312 | /* |
Paul Walmsley | 550c809 | 2011-02-28 11:58:14 -0700 | [diff] [blame] | 313 | * NOTE: omap_hwmod_setup*() has not yet been called, |
Kevin Hilman | 6f251e9 | 2010-09-27 20:19:38 +0530 | [diff] [blame] | 314 | * so no hwmod functions will work yet. |
Tony Lindgren | 84f90c9 | 2009-10-16 09:53:00 -0700 | [diff] [blame] | 315 | */ |
Tony Lindgren | 84f90c9 | 2009-10-16 09:53:00 -0700 | [diff] [blame] | 316 | |
Kevin Hilman | 6f251e9 | 2010-09-27 20:19:38 +0530 | [diff] [blame] | 317 | /* |
| 318 | * During UART early init, device need to be probed |
| 319 | * to determine SoC specific init before omap_device |
| 320 | * is ready. Therefore, don't allow idle here |
| 321 | */ |
| 322 | uart->oh->flags |= HWMOD_INIT_NO_IDLE | HWMOD_INIT_NO_RESET; |
| 323 | } while (1); |
Tony Lindgren | 3e16f92 | 2011-02-14 15:40:20 -0800 | [diff] [blame] | 324 | |
| 325 | return 0; |
Paul Walmsley | b3c6df3 | 2009-09-03 20:14:02 +0300 | [diff] [blame] | 326 | } |
Tony Lindgren | 3e16f92 | 2011-02-14 15:40:20 -0800 | [diff] [blame] | 327 | core_initcall(omap_serial_early_init); |
Paul Walmsley | b3c6df3 | 2009-09-03 20:14:02 +0300 | [diff] [blame] | 328 | |
Mika Westerberg | f62349e | 2009-12-11 16:16:35 -0800 | [diff] [blame] | 329 | /** |
| 330 | * omap_serial_init_port() - initialize single serial port |
Tony Lindgren | 40e4439 | 2010-12-22 18:42:35 -0800 | [diff] [blame] | 331 | * @bdata: port specific board data pointer |
Mika Westerberg | f62349e | 2009-12-11 16:16:35 -0800 | [diff] [blame] | 332 | * |
Tony Lindgren | 40e4439 | 2010-12-22 18:42:35 -0800 | [diff] [blame] | 333 | * This function initialies serial driver for given port only. |
Mika Westerberg | f62349e | 2009-12-11 16:16:35 -0800 | [diff] [blame] | 334 | * Platforms can call this function instead of omap_serial_init() |
| 335 | * if they don't plan to use all available UARTs as serial ports. |
| 336 | * |
| 337 | * Don't mix calls to omap_serial_init_port() and omap_serial_init(), |
| 338 | * use only one of the two. |
| 339 | */ |
Tony Lindgren | 40e4439 | 2010-12-22 18:42:35 -0800 | [diff] [blame] | 340 | void __init omap_serial_init_port(struct omap_board_data *bdata) |
Mika Westerberg | f62349e | 2009-12-11 16:16:35 -0800 | [diff] [blame] | 341 | { |
| 342 | struct omap_uart_state *uart; |
Kevin Hilman | 6f251e9 | 2010-09-27 20:19:38 +0530 | [diff] [blame] | 343 | struct omap_hwmod *oh; |
Kevin Hilman | 3528c58 | 2011-07-21 13:48:45 -0700 | [diff] [blame] | 344 | struct platform_device *pdev; |
Kevin Hilman | 6f251e9 | 2010-09-27 20:19:38 +0530 | [diff] [blame] | 345 | void *pdata = NULL; |
| 346 | u32 pdata_size = 0; |
| 347 | char *name; |
Kevin Hilman | 6f251e9 | 2010-09-27 20:19:38 +0530 | [diff] [blame] | 348 | struct omap_uart_port_info omap_up; |
Mika Westerberg | f62349e | 2009-12-11 16:16:35 -0800 | [diff] [blame] | 349 | |
Tony Lindgren | 40e4439 | 2010-12-22 18:42:35 -0800 | [diff] [blame] | 350 | if (WARN_ON(!bdata)) |
Sergio Aguirre | e88d556 | 2010-02-27 14:13:43 -0600 | [diff] [blame] | 351 | return; |
Tony Lindgren | 40e4439 | 2010-12-22 18:42:35 -0800 | [diff] [blame] | 352 | if (WARN_ON(bdata->id < 0)) |
| 353 | return; |
| 354 | if (WARN_ON(bdata->id >= num_uarts)) |
Mika Westerberg | f62349e | 2009-12-11 16:16:35 -0800 | [diff] [blame] | 355 | return; |
| 356 | |
Kevin Hilman | 6f251e9 | 2010-09-27 20:19:38 +0530 | [diff] [blame] | 357 | list_for_each_entry(uart, &uart_list, node) |
Tony Lindgren | 40e4439 | 2010-12-22 18:42:35 -0800 | [diff] [blame] | 358 | if (bdata->id == uart->num) |
Kevin Hilman | 6f251e9 | 2010-09-27 20:19:38 +0530 | [diff] [blame] | 359 | break; |
| 360 | |
| 361 | oh = uart->oh; |
Kevin Hilman | 6f251e9 | 2010-09-27 20:19:38 +0530 | [diff] [blame] | 362 | name = DRIVER_NAME; |
| 363 | |
| 364 | omap_up.dma_enabled = uart->dma_enabled; |
| 365 | omap_up.uartclk = OMAP24XX_BASE_BAUD * 16; |
Govindraj.R | 273558b | 2011-09-13 14:01:01 +0530 | [diff] [blame] | 366 | omap_up.flags = UPF_BOOT_AUTOCONF; |
Govindraj.R | ec3bebc | 2011-10-11 19:11:27 +0530 | [diff] [blame] | 367 | omap_up.get_context_loss_count = omap_pm_get_dev_context_loss_count; |
Govindraj.R | 9473474 | 2011-11-07 19:00:33 +0530 | [diff] [blame] | 368 | omap_up.set_forceidle = omap_uart_set_forceidle; |
| 369 | omap_up.set_noidle = omap_uart_set_noidle; |
Govindraj.R | 62f3ec5 | 2011-10-13 14:11:09 +0530 | [diff] [blame^] | 370 | omap_up.enable_wakeup = omap_uart_enable_wakeup; |
Govindraj.R | 9473474 | 2011-11-07 19:00:33 +0530 | [diff] [blame] | 371 | |
| 372 | /* Enable the MDR1 Errata i202 for OMAP2430/3xxx/44xx */ |
| 373 | if (!cpu_is_omap2420() && !cpu_is_ti816x()) |
| 374 | omap_up.errata |= UART_ERRATA_i202_MDR1_ACCESS; |
| 375 | |
| 376 | /* Enable DMA Mode Force Idle Errata i291 for omap34xx/3630 */ |
| 377 | if (cpu_is_omap34xx() || cpu_is_omap3630()) |
| 378 | omap_up.errata |= UART_ERRATA_i291_DMA_FORCEIDLE; |
Kevin Hilman | 6f251e9 | 2010-09-27 20:19:38 +0530 | [diff] [blame] | 379 | |
| 380 | pdata = &omap_up; |
| 381 | pdata_size = sizeof(struct omap_uart_port_info); |
Kevin Hilman | 6f251e9 | 2010-09-27 20:19:38 +0530 | [diff] [blame] | 382 | |
| 383 | if (WARN_ON(!oh)) |
| 384 | return; |
| 385 | |
Kevin Hilman | 3528c58 | 2011-07-21 13:48:45 -0700 | [diff] [blame] | 386 | pdev = omap_device_build(name, uart->num, oh, pdata, pdata_size, |
Benoit Cousson | f718e2c | 2011-08-10 15:30:09 +0200 | [diff] [blame] | 387 | NULL, 0, false); |
Kevin Hilman | 3528c58 | 2011-07-21 13:48:45 -0700 | [diff] [blame] | 388 | WARN(IS_ERR(pdev), "Could not build omap_device for %s: %s.\n", |
Kevin Hilman | 6f251e9 | 2010-09-27 20:19:38 +0530 | [diff] [blame] | 389 | name, oh->name); |
| 390 | |
Kevin Hilman | 9f8b694 | 2011-08-01 09:33:13 -0700 | [diff] [blame] | 391 | omap_device_disable_idle_on_suspend(pdev); |
Tony Lindgren | 40e4439 | 2010-12-22 18:42:35 -0800 | [diff] [blame] | 392 | oh->mux = omap_hwmod_mux_init(bdata->pads, bdata->pads_cnt); |
| 393 | |
Kevin Hilman | 3528c58 | 2011-07-21 13:48:45 -0700 | [diff] [blame] | 394 | uart->pdev = pdev; |
Kevin Hilman | 6f251e9 | 2010-09-27 20:19:38 +0530 | [diff] [blame] | 395 | |
| 396 | oh->dev_attr = uart; |
| 397 | |
Torben Hohn | ac751ef | 2011-01-25 15:07:35 -0800 | [diff] [blame] | 398 | console_lock(); /* in case the earlycon is on the UART */ |
Paul Walmsley | 0d8e2d0 | 2010-11-24 16:49:05 -0700 | [diff] [blame] | 399 | |
Kevin Hilman | 6f251e9 | 2010-09-27 20:19:38 +0530 | [diff] [blame] | 400 | /* |
| 401 | * Because of early UART probing, UART did not get idled |
| 402 | * on init. Now that omap_device is ready, ensure full idle |
| 403 | * before doing omap_device_enable(). |
| 404 | */ |
| 405 | omap_hwmod_idle(uart->oh); |
| 406 | |
| 407 | omap_device_enable(uart->pdev); |
Kevin Hilman | 6f251e9 | 2010-09-27 20:19:38 +0530 | [diff] [blame] | 408 | omap_device_idle(uart->pdev); |
| 409 | |
Kevin Hilman | 6f251e9 | 2010-09-27 20:19:38 +0530 | [diff] [blame] | 410 | omap_uart_block_sleep(uart); |
Torben Hohn | ac751ef | 2011-01-25 15:07:35 -0800 | [diff] [blame] | 411 | console_unlock(); |
Paul Walmsley | 0d8e2d0 | 2010-11-24 16:49:05 -0700 | [diff] [blame] | 412 | |
Govindraj.R | 62f3ec5 | 2011-10-13 14:11:09 +0530 | [diff] [blame^] | 413 | if ((cpu_is_omap34xx() || cpu_is_omap44xx()) && bdata->pads) |
Kevin Hilman | 3528c58 | 2011-07-21 13:48:45 -0700 | [diff] [blame] | 414 | device_init_wakeup(&pdev->dev, true); |
Mika Westerberg | f62349e | 2009-12-11 16:16:35 -0800 | [diff] [blame] | 415 | } |
| 416 | |
| 417 | /** |
Uwe Kleine-König | b595076 | 2010-11-01 15:38:34 -0400 | [diff] [blame] | 418 | * omap_serial_init() - initialize all supported serial ports |
Mika Westerberg | f62349e | 2009-12-11 16:16:35 -0800 | [diff] [blame] | 419 | * |
| 420 | * Initializes all available UARTs as serial ports. Platforms |
| 421 | * can call this function when they want to have default behaviour |
| 422 | * for serial ports (e.g initialize them all as serial ports). |
| 423 | */ |
Paul Walmsley | b3c6df3 | 2009-09-03 20:14:02 +0300 | [diff] [blame] | 424 | void __init omap_serial_init(void) |
| 425 | { |
Kevin Hilman | 6f251e9 | 2010-09-27 20:19:38 +0530 | [diff] [blame] | 426 | struct omap_uart_state *uart; |
Tony Lindgren | 40e4439 | 2010-12-22 18:42:35 -0800 | [diff] [blame] | 427 | struct omap_board_data bdata; |
Paul Walmsley | b3c6df3 | 2009-09-03 20:14:02 +0300 | [diff] [blame] | 428 | |
Tony Lindgren | 40e4439 | 2010-12-22 18:42:35 -0800 | [diff] [blame] | 429 | list_for_each_entry(uart, &uart_list, node) { |
| 430 | bdata.id = uart->num; |
| 431 | bdata.flags = 0; |
| 432 | bdata.pads = NULL; |
| 433 | bdata.pads_cnt = 0; |
Govindraj.R | 7496ba3 | 2011-11-07 18:55:05 +0530 | [diff] [blame] | 434 | |
| 435 | if (cpu_is_omap44xx() || cpu_is_omap34xx()) |
| 436 | omap_serial_fill_default_pads(&bdata); |
| 437 | |
Tony Lindgren | 40e4439 | 2010-12-22 18:42:35 -0800 | [diff] [blame] | 438 | omap_serial_init_port(&bdata); |
| 439 | |
| 440 | } |
Tony Lindgren | 1dbae81 | 2005-11-10 14:26:51 +0000 | [diff] [blame] | 441 | } |