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 | /* |
Deepak K | c86845db | 2011-11-09 17:33:38 +0530 | [diff] [blame] | 46 | * NOTE: By default the serial auto_suspend timeout is disabled as it causes |
| 47 | * lost characters over the serial ports. This means that the UART clocks will |
| 48 | * stay on until power/autosuspend_delay is set for the uart from sysfs. |
| 49 | * This also causes that any deeper omap sleep states are blocked. |
Tony Lindgren | 301fe8e | 2010-02-01 12:34:31 -0800 | [diff] [blame] | 50 | */ |
Deepak K | c86845db | 2011-11-09 17:33:38 +0530 | [diff] [blame] | 51 | #define DEFAULT_AUTOSUSPEND_DELAY -1 |
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 | struct list_head node; |
Kevin Hilman | 6f251e9 | 2010-09-27 20:19:38 +0530 | [diff] [blame] | 60 | struct omap_hwmod *oh; |
| 61 | struct platform_device *pdev; |
Kevin Hilman | 4af4016 | 2009-02-04 10:51:40 -0800 | [diff] [blame] | 62 | }; |
| 63 | |
Kevin Hilman | 4af4016 | 2009-02-04 10:51:40 -0800 | [diff] [blame] | 64 | static LIST_HEAD(uart_list); |
Kevin Hilman | 6f251e9 | 2010-09-27 20:19:38 +0530 | [diff] [blame] | 65 | static u8 num_uarts; |
Govindraj.R | 8612bd2 | 2011-11-07 19:05:44 +0530 | [diff] [blame] | 66 | static u8 console_uart_id = -1; |
Govindraj.R | 08f86b3 | 2011-10-18 17:09:10 +0530 | [diff] [blame^] | 67 | static u8 no_console_suspend; |
Tony Lindgren | 1dbae81 | 2005-11-10 14:26:51 +0000 | [diff] [blame] | 68 | |
Jon Hunter | a9e210e | 2011-11-09 17:34:49 +0530 | [diff] [blame] | 69 | #define DEFAULT_RXDMA_POLLRATE 1 /* RX DMA polling rate (us) */ |
Deepak K | c86845db | 2011-11-09 17:33:38 +0530 | [diff] [blame] | 70 | #define DEFAULT_RXDMA_BUFSIZE 4096 /* RX DMA buffer size */ |
Jon Hunter | a9e210e | 2011-11-09 17:34:49 +0530 | [diff] [blame] | 71 | #define DEFAULT_RXDMA_TIMEOUT (3 * HZ)/* RX DMA timeout (jiffies) */ |
Deepak K | c86845db | 2011-11-09 17:33:38 +0530 | [diff] [blame] | 72 | |
| 73 | static struct omap_uart_port_info omap_serial_default_info[] __initdata = { |
| 74 | { |
| 75 | .dma_enabled = false, |
| 76 | .dma_rx_buf_size = DEFAULT_RXDMA_BUFSIZE, |
Jon Hunter | a9e210e | 2011-11-09 17:34:49 +0530 | [diff] [blame] | 77 | .dma_rx_poll_rate = DEFAULT_RXDMA_POLLRATE, |
Deepak K | c86845db | 2011-11-09 17:33:38 +0530 | [diff] [blame] | 78 | .dma_rx_timeout = DEFAULT_RXDMA_TIMEOUT, |
| 79 | .autosuspend_timeout = DEFAULT_AUTOSUSPEND_DELAY, |
| 80 | }, |
| 81 | }; |
| 82 | |
Kevin Hilman | 4af4016 | 2009-02-04 10:51:40 -0800 | [diff] [blame] | 83 | #ifdef CONFIG_PM |
| 84 | |
Kevin Hilman | 4af4016 | 2009-02-04 10:51:40 -0800 | [diff] [blame] | 85 | int omap_uart_can_sleep(void) |
| 86 | { |
| 87 | struct omap_uart_state *uart; |
| 88 | int can_sleep = 1; |
| 89 | |
| 90 | list_for_each_entry(uart, &uart_list, node) { |
| 91 | if (!uart->clocked) |
| 92 | continue; |
| 93 | |
| 94 | if (!uart->can_sleep) { |
| 95 | can_sleep = 0; |
| 96 | continue; |
| 97 | } |
| 98 | |
| 99 | /* This UART can now safely sleep. */ |
| 100 | omap_uart_allow_sleep(uart); |
| 101 | } |
| 102 | |
| 103 | return can_sleep; |
| 104 | } |
| 105 | |
Govindraj.R | 62f3ec5 | 2011-10-13 14:11:09 +0530 | [diff] [blame] | 106 | static void omap_uart_enable_wakeup(struct platform_device *pdev, bool enable) |
Kevin Hilman | 4af4016 | 2009-02-04 10:51:40 -0800 | [diff] [blame] | 107 | { |
Govindraj.R | 62f3ec5 | 2011-10-13 14:11:09 +0530 | [diff] [blame] | 108 | struct omap_device *od = to_omap_device(pdev); |
Kevin Hilman | 4af4016 | 2009-02-04 10:51:40 -0800 | [diff] [blame] | 109 | |
Govindraj.R | 62f3ec5 | 2011-10-13 14:11:09 +0530 | [diff] [blame] | 110 | if (!od) |
| 111 | return; |
Kevin Hilman | 4af4016 | 2009-02-04 10:51:40 -0800 | [diff] [blame] | 112 | |
Govindraj.R | 62f3ec5 | 2011-10-13 14:11:09 +0530 | [diff] [blame] | 113 | if (enable) |
| 114 | omap_hwmod_enable_wakeup(od->hwmods[0]); |
| 115 | else |
| 116 | omap_hwmod_disable_wakeup(od->hwmods[0]); |
Kevin Hilman | 4af4016 | 2009-02-04 10:51:40 -0800 | [diff] [blame] | 117 | } |
| 118 | |
Govindraj.R | 9473474 | 2011-11-07 19:00:33 +0530 | [diff] [blame] | 119 | /* |
| 120 | * Errata i291: [UART]:Cannot Acknowledge Idle Requests |
| 121 | * in Smartidle Mode When Configured for DMA Operations. |
| 122 | * WA: configure uart in force idle mode. |
| 123 | */ |
| 124 | static void omap_uart_set_noidle(struct platform_device *pdev) |
| 125 | { |
| 126 | struct omap_device *od = to_omap_device(pdev); |
| 127 | |
| 128 | omap_hwmod_set_slave_idlemode(od->hwmods[0], HWMOD_IDLEMODE_NO); |
| 129 | } |
| 130 | |
| 131 | static void omap_uart_set_forceidle(struct platform_device *pdev) |
| 132 | { |
| 133 | struct omap_device *od = to_omap_device(pdev); |
| 134 | |
| 135 | omap_hwmod_set_slave_idlemode(od->hwmods[0], HWMOD_IDLEMODE_FORCE); |
| 136 | } |
| 137 | |
Kevin Hilman | 4af4016 | 2009-02-04 10:51:40 -0800 | [diff] [blame] | 138 | #else |
Govindraj.R | 62f3ec5 | 2011-10-13 14:11:09 +0530 | [diff] [blame] | 139 | static void omap_uart_enable_wakeup(struct platform_device *pdev, bool enable) |
| 140 | {} |
Govindraj.R | 9473474 | 2011-11-07 19:00:33 +0530 | [diff] [blame] | 141 | static void omap_uart_set_noidle(struct platform_device *pdev) {} |
| 142 | static void omap_uart_set_forceidle(struct platform_device *pdev) {} |
Kevin Hilman | 4af4016 | 2009-02-04 10:51:40 -0800 | [diff] [blame] | 143 | #endif /* CONFIG_PM */ |
| 144 | |
Govindraj.R | 7496ba3 | 2011-11-07 18:55:05 +0530 | [diff] [blame] | 145 | #ifdef CONFIG_OMAP_MUX |
| 146 | static struct omap_device_pad default_uart1_pads[] __initdata = { |
| 147 | { |
| 148 | .name = "uart1_cts.uart1_cts", |
| 149 | .enable = OMAP_PIN_INPUT_PULLUP | OMAP_MUX_MODE0, |
| 150 | }, |
| 151 | { |
| 152 | .name = "uart1_rts.uart1_rts", |
| 153 | .enable = OMAP_PIN_OUTPUT | OMAP_MUX_MODE0, |
| 154 | }, |
| 155 | { |
| 156 | .name = "uart1_tx.uart1_tx", |
| 157 | .enable = OMAP_PIN_OUTPUT | OMAP_MUX_MODE0, |
| 158 | }, |
| 159 | { |
| 160 | .name = "uart1_rx.uart1_rx", |
| 161 | .flags = OMAP_DEVICE_PAD_REMUX | OMAP_DEVICE_PAD_WAKEUP, |
| 162 | .enable = OMAP_PIN_INPUT_PULLUP | OMAP_MUX_MODE0, |
| 163 | .idle = OMAP_PIN_INPUT_PULLUP | OMAP_MUX_MODE0, |
| 164 | }, |
| 165 | }; |
| 166 | |
| 167 | static struct omap_device_pad default_uart2_pads[] __initdata = { |
| 168 | { |
| 169 | .name = "uart2_cts.uart2_cts", |
| 170 | .enable = OMAP_PIN_INPUT_PULLUP | OMAP_MUX_MODE0, |
| 171 | }, |
| 172 | { |
| 173 | .name = "uart2_rts.uart2_rts", |
| 174 | .enable = OMAP_PIN_OUTPUT | OMAP_MUX_MODE0, |
| 175 | }, |
| 176 | { |
| 177 | .name = "uart2_tx.uart2_tx", |
| 178 | .enable = OMAP_PIN_OUTPUT | OMAP_MUX_MODE0, |
| 179 | }, |
| 180 | { |
| 181 | .name = "uart2_rx.uart2_rx", |
| 182 | .flags = OMAP_DEVICE_PAD_REMUX | OMAP_DEVICE_PAD_WAKEUP, |
| 183 | .enable = OMAP_PIN_INPUT_PULLUP | OMAP_MUX_MODE0, |
| 184 | .idle = OMAP_PIN_INPUT_PULLUP | OMAP_MUX_MODE0, |
| 185 | }, |
| 186 | }; |
| 187 | |
| 188 | static struct omap_device_pad default_uart3_pads[] __initdata = { |
| 189 | { |
| 190 | .name = "uart3_cts_rctx.uart3_cts_rctx", |
| 191 | .enable = OMAP_PIN_INPUT_PULLUP | OMAP_MUX_MODE0, |
| 192 | }, |
| 193 | { |
| 194 | .name = "uart3_rts_sd.uart3_rts_sd", |
| 195 | .enable = OMAP_PIN_OUTPUT | OMAP_MUX_MODE0, |
| 196 | }, |
| 197 | { |
| 198 | .name = "uart3_tx_irtx.uart3_tx_irtx", |
| 199 | .enable = OMAP_PIN_OUTPUT | OMAP_MUX_MODE0, |
| 200 | }, |
| 201 | { |
| 202 | .name = "uart3_rx_irrx.uart3_rx_irrx", |
| 203 | .flags = OMAP_DEVICE_PAD_REMUX | OMAP_DEVICE_PAD_WAKEUP, |
| 204 | .enable = OMAP_PIN_INPUT | OMAP_MUX_MODE0, |
| 205 | .idle = OMAP_PIN_INPUT | OMAP_MUX_MODE0, |
| 206 | }, |
| 207 | }; |
| 208 | |
| 209 | static struct omap_device_pad default_omap36xx_uart4_pads[] __initdata = { |
| 210 | { |
| 211 | .name = "gpmc_wait2.uart4_tx", |
| 212 | .enable = OMAP_PIN_OUTPUT | OMAP_MUX_MODE0, |
| 213 | }, |
| 214 | { |
| 215 | .name = "gpmc_wait3.uart4_rx", |
| 216 | .flags = OMAP_DEVICE_PAD_REMUX | OMAP_DEVICE_PAD_WAKEUP, |
| 217 | .enable = OMAP_PIN_INPUT | OMAP_MUX_MODE2, |
| 218 | .idle = OMAP_PIN_INPUT | OMAP_MUX_MODE2, |
| 219 | }, |
| 220 | }; |
| 221 | |
| 222 | static struct omap_device_pad default_omap4_uart4_pads[] __initdata = { |
| 223 | { |
| 224 | .name = "uart4_tx.uart4_tx", |
| 225 | .enable = OMAP_PIN_OUTPUT | OMAP_MUX_MODE0, |
| 226 | }, |
| 227 | { |
| 228 | .name = "uart4_rx.uart4_rx", |
| 229 | .flags = OMAP_DEVICE_PAD_REMUX | OMAP_DEVICE_PAD_WAKEUP, |
| 230 | .enable = OMAP_PIN_INPUT | OMAP_MUX_MODE0, |
| 231 | .idle = OMAP_PIN_INPUT | OMAP_MUX_MODE0, |
| 232 | }, |
| 233 | }; |
| 234 | |
| 235 | static void omap_serial_fill_default_pads(struct omap_board_data *bdata) |
| 236 | { |
| 237 | switch (bdata->id) { |
| 238 | case 0: |
| 239 | bdata->pads = default_uart1_pads; |
| 240 | bdata->pads_cnt = ARRAY_SIZE(default_uart1_pads); |
| 241 | break; |
| 242 | case 1: |
| 243 | bdata->pads = default_uart2_pads; |
| 244 | bdata->pads_cnt = ARRAY_SIZE(default_uart2_pads); |
| 245 | break; |
| 246 | case 2: |
| 247 | bdata->pads = default_uart3_pads; |
| 248 | bdata->pads_cnt = ARRAY_SIZE(default_uart3_pads); |
| 249 | break; |
| 250 | case 3: |
| 251 | if (cpu_is_omap44xx()) { |
| 252 | bdata->pads = default_omap4_uart4_pads; |
| 253 | bdata->pads_cnt = |
| 254 | ARRAY_SIZE(default_omap4_uart4_pads); |
| 255 | } else if (cpu_is_omap3630()) { |
| 256 | bdata->pads = default_omap36xx_uart4_pads; |
| 257 | bdata->pads_cnt = |
| 258 | ARRAY_SIZE(default_omap36xx_uart4_pads); |
| 259 | } |
| 260 | break; |
| 261 | default: |
| 262 | break; |
| 263 | } |
| 264 | } |
| 265 | #else |
| 266 | static void omap_serial_fill_default_pads(struct omap_board_data *bdata) {} |
| 267 | #endif |
| 268 | |
Govindraj.R | 8612bd2 | 2011-11-07 19:05:44 +0530 | [diff] [blame] | 269 | char *cmdline_find_option(char *str) |
| 270 | { |
| 271 | extern char *saved_command_line; |
| 272 | |
| 273 | return strstr(saved_command_line, str); |
| 274 | } |
| 275 | |
Tony Lindgren | 3e16f92 | 2011-02-14 15:40:20 -0800 | [diff] [blame] | 276 | static int __init omap_serial_early_init(void) |
Tony Lindgren | 1dbae81 | 2005-11-10 14:26:51 +0000 | [diff] [blame] | 277 | { |
Kevin Hilman | 6f251e9 | 2010-09-27 20:19:38 +0530 | [diff] [blame] | 278 | do { |
| 279 | char oh_name[MAX_UART_HWMOD_NAME_LEN]; |
| 280 | struct omap_hwmod *oh; |
| 281 | struct omap_uart_state *uart; |
Govindraj.R | 8612bd2 | 2011-11-07 19:05:44 +0530 | [diff] [blame] | 282 | char uart_name[MAX_UART_HWMOD_NAME_LEN]; |
Thomas Weber | 21b9034 | 2010-02-25 09:40:19 +0000 | [diff] [blame] | 283 | |
Kevin Hilman | 6f251e9 | 2010-09-27 20:19:38 +0530 | [diff] [blame] | 284 | snprintf(oh_name, MAX_UART_HWMOD_NAME_LEN, |
Govindraj.R | 969996a | 2011-10-18 16:32:14 +0530 | [diff] [blame] | 285 | "uart%d", num_uarts + 1); |
Kevin Hilman | 6f251e9 | 2010-09-27 20:19:38 +0530 | [diff] [blame] | 286 | oh = omap_hwmod_lookup(oh_name); |
| 287 | if (!oh) |
| 288 | break; |
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 | uart = kzalloc(sizeof(struct omap_uart_state), GFP_KERNEL); |
| 291 | if (WARN_ON(!uart)) |
Tony Lindgren | 3e16f92 | 2011-02-14 15:40:20 -0800 | [diff] [blame] | 292 | return -ENODEV; |
Tony Lindgren | 1dbae81 | 2005-11-10 14:26:51 +0000 | [diff] [blame] | 293 | |
Kevin Hilman | 6f251e9 | 2010-09-27 20:19:38 +0530 | [diff] [blame] | 294 | uart->oh = oh; |
Govindraj.R | 969996a | 2011-10-18 16:32:14 +0530 | [diff] [blame] | 295 | uart->num = num_uarts++; |
Kevin Hilman | 6f251e9 | 2010-09-27 20:19:38 +0530 | [diff] [blame] | 296 | list_add_tail(&uart->node, &uart_list); |
Govindraj.R | 8612bd2 | 2011-11-07 19:05:44 +0530 | [diff] [blame] | 297 | snprintf(uart_name, MAX_UART_HWMOD_NAME_LEN, |
| 298 | "%s%d", OMAP_SERIAL_NAME, uart->num); |
Kevin Hilman | 6f251e9 | 2010-09-27 20:19:38 +0530 | [diff] [blame] | 299 | |
Govindraj.R | 8612bd2 | 2011-11-07 19:05:44 +0530 | [diff] [blame] | 300 | if (cmdline_find_option(uart_name)) { |
| 301 | console_uart_id = uart->num; |
Govindraj.R | 08f86b3 | 2011-10-18 17:09:10 +0530 | [diff] [blame^] | 302 | |
| 303 | if (cmdline_find_option("no_console_suspend")) |
| 304 | no_console_suspend = true; |
| 305 | |
Govindraj.R | 8612bd2 | 2011-11-07 19:05:44 +0530 | [diff] [blame] | 306 | /* |
| 307 | * omap-uart can be used for earlyprintk logs |
| 308 | * So if omap-uart is used as console then prevent |
| 309 | * uart reset and idle to get logs from omap-uart |
| 310 | * until uart console driver is available to take |
| 311 | * care for console messages. |
| 312 | * Idling or resetting omap-uart while printing logs |
| 313 | * early boot logs can stall the boot-up. |
| 314 | */ |
| 315 | oh->flags |= HWMOD_INIT_NO_IDLE | HWMOD_INIT_NO_RESET; |
| 316 | } |
Kevin Hilman | 6f251e9 | 2010-09-27 20:19:38 +0530 | [diff] [blame] | 317 | } while (1); |
Tony Lindgren | 3e16f92 | 2011-02-14 15:40:20 -0800 | [diff] [blame] | 318 | |
| 319 | return 0; |
Paul Walmsley | b3c6df3 | 2009-09-03 20:14:02 +0300 | [diff] [blame] | 320 | } |
Tony Lindgren | 3e16f92 | 2011-02-14 15:40:20 -0800 | [diff] [blame] | 321 | core_initcall(omap_serial_early_init); |
Paul Walmsley | b3c6df3 | 2009-09-03 20:14:02 +0300 | [diff] [blame] | 322 | |
Mika Westerberg | f62349e | 2009-12-11 16:16:35 -0800 | [diff] [blame] | 323 | /** |
| 324 | * omap_serial_init_port() - initialize single serial port |
Tony Lindgren | 40e4439 | 2010-12-22 18:42:35 -0800 | [diff] [blame] | 325 | * @bdata: port specific board data pointer |
Deepak K | c86845db | 2011-11-09 17:33:38 +0530 | [diff] [blame] | 326 | * @info: platform specific data pointer |
Mika Westerberg | f62349e | 2009-12-11 16:16:35 -0800 | [diff] [blame] | 327 | * |
Tony Lindgren | 40e4439 | 2010-12-22 18:42:35 -0800 | [diff] [blame] | 328 | * This function initialies serial driver for given port only. |
Mika Westerberg | f62349e | 2009-12-11 16:16:35 -0800 | [diff] [blame] | 329 | * Platforms can call this function instead of omap_serial_init() |
| 330 | * if they don't plan to use all available UARTs as serial ports. |
| 331 | * |
| 332 | * Don't mix calls to omap_serial_init_port() and omap_serial_init(), |
| 333 | * use only one of the two. |
| 334 | */ |
Deepak K | c86845db | 2011-11-09 17:33:38 +0530 | [diff] [blame] | 335 | void __init omap_serial_init_port(struct omap_board_data *bdata, |
| 336 | struct omap_uart_port_info *info) |
Mika Westerberg | f62349e | 2009-12-11 16:16:35 -0800 | [diff] [blame] | 337 | { |
| 338 | struct omap_uart_state *uart; |
Kevin Hilman | 6f251e9 | 2010-09-27 20:19:38 +0530 | [diff] [blame] | 339 | struct omap_hwmod *oh; |
Kevin Hilman | 3528c58 | 2011-07-21 13:48:45 -0700 | [diff] [blame] | 340 | struct platform_device *pdev; |
Kevin Hilman | 6f251e9 | 2010-09-27 20:19:38 +0530 | [diff] [blame] | 341 | void *pdata = NULL; |
| 342 | u32 pdata_size = 0; |
| 343 | char *name; |
Kevin Hilman | 6f251e9 | 2010-09-27 20:19:38 +0530 | [diff] [blame] | 344 | struct omap_uart_port_info omap_up; |
Mika Westerberg | f62349e | 2009-12-11 16:16:35 -0800 | [diff] [blame] | 345 | |
Tony Lindgren | 40e4439 | 2010-12-22 18:42:35 -0800 | [diff] [blame] | 346 | if (WARN_ON(!bdata)) |
Sergio Aguirre | e88d556 | 2010-02-27 14:13:43 -0600 | [diff] [blame] | 347 | return; |
Tony Lindgren | 40e4439 | 2010-12-22 18:42:35 -0800 | [diff] [blame] | 348 | if (WARN_ON(bdata->id < 0)) |
| 349 | return; |
| 350 | if (WARN_ON(bdata->id >= num_uarts)) |
Mika Westerberg | f62349e | 2009-12-11 16:16:35 -0800 | [diff] [blame] | 351 | return; |
| 352 | |
Kevin Hilman | 6f251e9 | 2010-09-27 20:19:38 +0530 | [diff] [blame] | 353 | list_for_each_entry(uart, &uart_list, node) |
Tony Lindgren | 40e4439 | 2010-12-22 18:42:35 -0800 | [diff] [blame] | 354 | if (bdata->id == uart->num) |
Kevin Hilman | 6f251e9 | 2010-09-27 20:19:38 +0530 | [diff] [blame] | 355 | break; |
Deepak K | c86845db | 2011-11-09 17:33:38 +0530 | [diff] [blame] | 356 | if (!info) |
| 357 | info = omap_serial_default_info; |
Kevin Hilman | 6f251e9 | 2010-09-27 20:19:38 +0530 | [diff] [blame] | 358 | |
| 359 | oh = uart->oh; |
Kevin Hilman | 6f251e9 | 2010-09-27 20:19:38 +0530 | [diff] [blame] | 360 | name = DRIVER_NAME; |
| 361 | |
Deepak K | c86845db | 2011-11-09 17:33:38 +0530 | [diff] [blame] | 362 | omap_up.dma_enabled = info->dma_enabled; |
Kevin Hilman | 6f251e9 | 2010-09-27 20:19:38 +0530 | [diff] [blame] | 363 | omap_up.uartclk = OMAP24XX_BASE_BAUD * 16; |
Govindraj.R | 273558b | 2011-09-13 14:01:01 +0530 | [diff] [blame] | 364 | omap_up.flags = UPF_BOOT_AUTOCONF; |
Govindraj.R | ec3bebc | 2011-10-11 19:11:27 +0530 | [diff] [blame] | 365 | 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] | 366 | omap_up.set_forceidle = omap_uart_set_forceidle; |
| 367 | omap_up.set_noidle = omap_uart_set_noidle; |
Govindraj.R | 62f3ec5 | 2011-10-13 14:11:09 +0530 | [diff] [blame] | 368 | omap_up.enable_wakeup = omap_uart_enable_wakeup; |
Deepak K | c86845db | 2011-11-09 17:33:38 +0530 | [diff] [blame] | 369 | omap_up.dma_rx_buf_size = info->dma_rx_buf_size; |
| 370 | omap_up.dma_rx_timeout = info->dma_rx_timeout; |
Jon Hunter | a9e210e | 2011-11-09 17:34:49 +0530 | [diff] [blame] | 371 | omap_up.dma_rx_poll_rate = info->dma_rx_poll_rate; |
Deepak K | c86845db | 2011-11-09 17:33:38 +0530 | [diff] [blame] | 372 | omap_up.autosuspend_timeout = info->autosuspend_timeout; |
Govindraj.R | 9473474 | 2011-11-07 19:00:33 +0530 | [diff] [blame] | 373 | |
| 374 | /* Enable the MDR1 Errata i202 for OMAP2430/3xxx/44xx */ |
| 375 | if (!cpu_is_omap2420() && !cpu_is_ti816x()) |
| 376 | omap_up.errata |= UART_ERRATA_i202_MDR1_ACCESS; |
| 377 | |
| 378 | /* Enable DMA Mode Force Idle Errata i291 for omap34xx/3630 */ |
| 379 | if (cpu_is_omap34xx() || cpu_is_omap3630()) |
| 380 | omap_up.errata |= UART_ERRATA_i291_DMA_FORCEIDLE; |
Kevin Hilman | 6f251e9 | 2010-09-27 20:19:38 +0530 | [diff] [blame] | 381 | |
| 382 | pdata = &omap_up; |
| 383 | pdata_size = sizeof(struct omap_uart_port_info); |
Kevin Hilman | 6f251e9 | 2010-09-27 20:19:38 +0530 | [diff] [blame] | 384 | |
| 385 | if (WARN_ON(!oh)) |
| 386 | return; |
| 387 | |
Kevin Hilman | 3528c58 | 2011-07-21 13:48:45 -0700 | [diff] [blame] | 388 | pdev = omap_device_build(name, uart->num, oh, pdata, pdata_size, |
Benoit Cousson | f718e2c | 2011-08-10 15:30:09 +0200 | [diff] [blame] | 389 | NULL, 0, false); |
Kevin Hilman | 3528c58 | 2011-07-21 13:48:45 -0700 | [diff] [blame] | 390 | 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] | 391 | name, oh->name); |
| 392 | |
Govindraj.R | 08f86b3 | 2011-10-18 17:09:10 +0530 | [diff] [blame^] | 393 | if ((console_uart_id == bdata->id) && no_console_suspend) |
| 394 | omap_device_disable_idle_on_suspend(pdev); |
| 395 | |
Tony Lindgren | 40e4439 | 2010-12-22 18:42:35 -0800 | [diff] [blame] | 396 | oh->mux = omap_hwmod_mux_init(bdata->pads, bdata->pads_cnt); |
| 397 | |
Kevin Hilman | 3528c58 | 2011-07-21 13:48:45 -0700 | [diff] [blame] | 398 | uart->pdev = pdev; |
Kevin Hilman | 6f251e9 | 2010-09-27 20:19:38 +0530 | [diff] [blame] | 399 | |
| 400 | oh->dev_attr = uart; |
| 401 | |
Govindraj.R | 62f3ec5 | 2011-10-13 14:11:09 +0530 | [diff] [blame] | 402 | if ((cpu_is_omap34xx() || cpu_is_omap44xx()) && bdata->pads) |
Kevin Hilman | 3528c58 | 2011-07-21 13:48:45 -0700 | [diff] [blame] | 403 | device_init_wakeup(&pdev->dev, true); |
Mika Westerberg | f62349e | 2009-12-11 16:16:35 -0800 | [diff] [blame] | 404 | } |
| 405 | |
| 406 | /** |
Deepak K | c86845db | 2011-11-09 17:33:38 +0530 | [diff] [blame] | 407 | * omap_serial_board_init() - initialize all supported serial ports |
| 408 | * @info: platform specific data pointer |
Mika Westerberg | f62349e | 2009-12-11 16:16:35 -0800 | [diff] [blame] | 409 | * |
| 410 | * Initializes all available UARTs as serial ports. Platforms |
| 411 | * can call this function when they want to have default behaviour |
| 412 | * for serial ports (e.g initialize them all as serial ports). |
| 413 | */ |
Deepak K | c86845db | 2011-11-09 17:33:38 +0530 | [diff] [blame] | 414 | void __init omap_serial_board_init(struct omap_uart_port_info *info) |
Paul Walmsley | b3c6df3 | 2009-09-03 20:14:02 +0300 | [diff] [blame] | 415 | { |
Kevin Hilman | 6f251e9 | 2010-09-27 20:19:38 +0530 | [diff] [blame] | 416 | struct omap_uart_state *uart; |
Tony Lindgren | 40e4439 | 2010-12-22 18:42:35 -0800 | [diff] [blame] | 417 | struct omap_board_data bdata; |
Paul Walmsley | b3c6df3 | 2009-09-03 20:14:02 +0300 | [diff] [blame] | 418 | |
Tony Lindgren | 40e4439 | 2010-12-22 18:42:35 -0800 | [diff] [blame] | 419 | list_for_each_entry(uart, &uart_list, node) { |
| 420 | bdata.id = uart->num; |
| 421 | bdata.flags = 0; |
| 422 | bdata.pads = NULL; |
| 423 | bdata.pads_cnt = 0; |
Govindraj.R | 7496ba3 | 2011-11-07 18:55:05 +0530 | [diff] [blame] | 424 | |
| 425 | if (cpu_is_omap44xx() || cpu_is_omap34xx()) |
| 426 | omap_serial_fill_default_pads(&bdata); |
| 427 | |
Deepak K | c86845db | 2011-11-09 17:33:38 +0530 | [diff] [blame] | 428 | if (!info) |
| 429 | omap_serial_init_port(&bdata, NULL); |
| 430 | else |
| 431 | omap_serial_init_port(&bdata, &info[uart->num]); |
Tony Lindgren | 40e4439 | 2010-12-22 18:42:35 -0800 | [diff] [blame] | 432 | } |
Tony Lindgren | 1dbae81 | 2005-11-10 14:26:51 +0000 | [diff] [blame] | 433 | } |
Deepak K | c86845db | 2011-11-09 17:33:38 +0530 | [diff] [blame] | 434 | |
| 435 | /** |
| 436 | * omap_serial_init() - initialize all supported serial ports |
| 437 | * |
| 438 | * Initializes all available UARTs. |
| 439 | * Platforms can call this function when they want to have default behaviour |
| 440 | * for serial ports (e.g initialize them all as serial ports). |
| 441 | */ |
| 442 | void __init omap_serial_init(void) |
| 443 | { |
| 444 | omap_serial_board_init(NULL); |
| 445 | } |