Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | * Derived from many drivers using generic_serial interface, |
| 3 | * especially serial_tx3912.c by Steven J. Hill and r39xx_serial.c |
| 4 | * (was in Linux/VR tree) by Jim Pick. |
| 5 | * |
| 6 | * Copyright (C) 1999 Harald Koerfgen |
| 7 | * Copyright (C) 2000 Jim Pick <jim@jimpick.com> |
| 8 | * Copyright (C) 2001 Steven J. Hill (sjhill@realitydiluted.com) |
| 9 | * Copyright (C) 2000-2002 Toshiba Corporation |
| 10 | * |
| 11 | * This program is free software; you can redistribute it and/or modify |
| 12 | * it under the terms of the GNU General Public License version 2 as |
| 13 | * published by the Free Software Foundation. |
| 14 | * |
| 15 | * Serial driver for TX3927/TX4927/TX4925/TX4938 internal SIO controller |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 16 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | |
| 18 | #if defined(CONFIG_SERIAL_TXX9_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ) |
| 19 | #define SUPPORT_SYSRQ |
| 20 | #endif |
| 21 | |
| 22 | #include <linux/module.h> |
| 23 | #include <linux/ioport.h> |
| 24 | #include <linux/init.h> |
| 25 | #include <linux/console.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | #include <linux/delay.h> |
Atsushi Nemoto | 0970769 | 2007-02-22 02:17:28 +0900 | [diff] [blame] | 27 | #include <linux/platform_device.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | #include <linux/pci.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | #include <linux/serial_core.h> |
| 30 | #include <linux/serial.h> |
Jiri Slaby | ee160a3 | 2011-09-01 16:20:57 +0200 | [diff] [blame] | 31 | #include <linux/tty.h> |
| 32 | #include <linux/tty_flip.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | |
| 34 | #include <asm/io.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | |
Atsushi Nemoto | 37a6c7d | 2007-10-16 01:24:02 -0700 | [diff] [blame] | 36 | static char *serial_version = "1.11"; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | static char *serial_name = "TX39/49 Serial driver"; |
| 38 | |
| 39 | #define PASS_LIMIT 256 |
| 40 | |
| 41 | #if !defined(CONFIG_SERIAL_TXX9_STDSERIAL) |
| 42 | /* "ttyS" is used for standard serial driver */ |
| 43 | #define TXX9_TTY_NAME "ttyTX" |
Atsushi Nemoto | 07bafde | 2007-05-08 00:30:26 -0700 | [diff] [blame] | 44 | #define TXX9_TTY_MINOR_START 196 |
| 45 | #define TXX9_TTY_MAJOR 204 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | #else |
| 47 | /* acts like standard serial driver */ |
| 48 | #define TXX9_TTY_NAME "ttyS" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | #define TXX9_TTY_MINOR_START 64 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | #define TXX9_TTY_MAJOR TTY_MAJOR |
Atsushi Nemoto | 07bafde | 2007-05-08 00:30:26 -0700 | [diff] [blame] | 51 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | |
| 53 | /* flag aliases */ |
| 54 | #define UPF_TXX9_HAVE_CTS_LINE UPF_BUGGY_UART |
| 55 | #define UPF_TXX9_USE_SCLK UPF_MAGIC_MULTIPLIER |
| 56 | |
| 57 | #ifdef CONFIG_PCI |
| 58 | /* support for Toshiba TC86C001 SIO */ |
| 59 | #define ENABLE_SERIAL_TXX9_PCI |
| 60 | #endif |
| 61 | |
| 62 | /* |
| 63 | * Number of serial ports |
| 64 | */ |
Atsushi Nemoto | 138c5d2 | 2007-02-10 01:45:05 -0800 | [diff] [blame] | 65 | #define UART_NR CONFIG_SERIAL_TXX9_NR_UARTS |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | |
| 67 | struct uart_txx9_port { |
| 68 | struct uart_port port; |
Atsushi Nemoto | 0970769 | 2007-02-22 02:17:28 +0900 | [diff] [blame] | 69 | /* No additional info for now */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | }; |
| 71 | |
| 72 | #define TXX9_REGION_SIZE 0x24 |
| 73 | |
| 74 | /* TXX9 Serial Registers */ |
| 75 | #define TXX9_SILCR 0x00 |
| 76 | #define TXX9_SIDICR 0x04 |
| 77 | #define TXX9_SIDISR 0x08 |
| 78 | #define TXX9_SICISR 0x0c |
| 79 | #define TXX9_SIFCR 0x10 |
| 80 | #define TXX9_SIFLCR 0x14 |
| 81 | #define TXX9_SIBGR 0x18 |
| 82 | #define TXX9_SITFIFO 0x1c |
| 83 | #define TXX9_SIRFIFO 0x20 |
| 84 | |
| 85 | /* SILCR : Line Control */ |
| 86 | #define TXX9_SILCR_SCS_MASK 0x00000060 |
| 87 | #define TXX9_SILCR_SCS_IMCLK 0x00000000 |
| 88 | #define TXX9_SILCR_SCS_IMCLK_BG 0x00000020 |
| 89 | #define TXX9_SILCR_SCS_SCLK 0x00000040 |
| 90 | #define TXX9_SILCR_SCS_SCLK_BG 0x00000060 |
| 91 | #define TXX9_SILCR_UEPS 0x00000010 |
| 92 | #define TXX9_SILCR_UPEN 0x00000008 |
| 93 | #define TXX9_SILCR_USBL_MASK 0x00000004 |
| 94 | #define TXX9_SILCR_USBL_1BIT 0x00000000 |
| 95 | #define TXX9_SILCR_USBL_2BIT 0x00000004 |
| 96 | #define TXX9_SILCR_UMODE_MASK 0x00000003 |
| 97 | #define TXX9_SILCR_UMODE_8BIT 0x00000000 |
| 98 | #define TXX9_SILCR_UMODE_7BIT 0x00000001 |
| 99 | |
| 100 | /* SIDICR : DMA/Int. Control */ |
| 101 | #define TXX9_SIDICR_TDE 0x00008000 |
| 102 | #define TXX9_SIDICR_RDE 0x00004000 |
| 103 | #define TXX9_SIDICR_TIE 0x00002000 |
| 104 | #define TXX9_SIDICR_RIE 0x00001000 |
| 105 | #define TXX9_SIDICR_SPIE 0x00000800 |
| 106 | #define TXX9_SIDICR_CTSAC 0x00000600 |
| 107 | #define TXX9_SIDICR_STIE_MASK 0x0000003f |
| 108 | #define TXX9_SIDICR_STIE_OERS 0x00000020 |
| 109 | #define TXX9_SIDICR_STIE_CTSS 0x00000010 |
| 110 | #define TXX9_SIDICR_STIE_RBRKD 0x00000008 |
| 111 | #define TXX9_SIDICR_STIE_TRDY 0x00000004 |
| 112 | #define TXX9_SIDICR_STIE_TXALS 0x00000002 |
| 113 | #define TXX9_SIDICR_STIE_UBRKD 0x00000001 |
| 114 | |
| 115 | /* SIDISR : DMA/Int. Status */ |
| 116 | #define TXX9_SIDISR_UBRK 0x00008000 |
| 117 | #define TXX9_SIDISR_UVALID 0x00004000 |
| 118 | #define TXX9_SIDISR_UFER 0x00002000 |
| 119 | #define TXX9_SIDISR_UPER 0x00001000 |
| 120 | #define TXX9_SIDISR_UOER 0x00000800 |
| 121 | #define TXX9_SIDISR_ERI 0x00000400 |
| 122 | #define TXX9_SIDISR_TOUT 0x00000200 |
| 123 | #define TXX9_SIDISR_TDIS 0x00000100 |
| 124 | #define TXX9_SIDISR_RDIS 0x00000080 |
| 125 | #define TXX9_SIDISR_STIS 0x00000040 |
| 126 | #define TXX9_SIDISR_RFDN_MASK 0x0000001f |
| 127 | |
| 128 | /* SICISR : Change Int. Status */ |
| 129 | #define TXX9_SICISR_OERS 0x00000020 |
| 130 | #define TXX9_SICISR_CTSS 0x00000010 |
| 131 | #define TXX9_SICISR_RBRKD 0x00000008 |
| 132 | #define TXX9_SICISR_TRDY 0x00000004 |
| 133 | #define TXX9_SICISR_TXALS 0x00000002 |
| 134 | #define TXX9_SICISR_UBRKD 0x00000001 |
| 135 | |
| 136 | /* SIFCR : FIFO Control */ |
| 137 | #define TXX9_SIFCR_SWRST 0x00008000 |
| 138 | #define TXX9_SIFCR_RDIL_MASK 0x00000180 |
| 139 | #define TXX9_SIFCR_RDIL_1 0x00000000 |
| 140 | #define TXX9_SIFCR_RDIL_4 0x00000080 |
| 141 | #define TXX9_SIFCR_RDIL_8 0x00000100 |
| 142 | #define TXX9_SIFCR_RDIL_12 0x00000180 |
| 143 | #define TXX9_SIFCR_RDIL_MAX 0x00000180 |
| 144 | #define TXX9_SIFCR_TDIL_MASK 0x00000018 |
| 145 | #define TXX9_SIFCR_TDIL_MASK 0x00000018 |
| 146 | #define TXX9_SIFCR_TDIL_1 0x00000000 |
| 147 | #define TXX9_SIFCR_TDIL_4 0x00000001 |
| 148 | #define TXX9_SIFCR_TDIL_8 0x00000010 |
| 149 | #define TXX9_SIFCR_TDIL_MAX 0x00000010 |
| 150 | #define TXX9_SIFCR_TFRST 0x00000004 |
| 151 | #define TXX9_SIFCR_RFRST 0x00000002 |
| 152 | #define TXX9_SIFCR_FRSTE 0x00000001 |
| 153 | #define TXX9_SIO_TX_FIFO 8 |
| 154 | #define TXX9_SIO_RX_FIFO 16 |
| 155 | |
| 156 | /* SIFLCR : Flow Control */ |
| 157 | #define TXX9_SIFLCR_RCS 0x00001000 |
| 158 | #define TXX9_SIFLCR_TES 0x00000800 |
| 159 | #define TXX9_SIFLCR_RTSSC 0x00000200 |
| 160 | #define TXX9_SIFLCR_RSDE 0x00000100 |
| 161 | #define TXX9_SIFLCR_TSDE 0x00000080 |
| 162 | #define TXX9_SIFLCR_RTSTL_MASK 0x0000001e |
| 163 | #define TXX9_SIFLCR_RTSTL_MAX 0x0000001e |
| 164 | #define TXX9_SIFLCR_TBRK 0x00000001 |
| 165 | |
| 166 | /* SIBGR : Baudrate Control */ |
| 167 | #define TXX9_SIBGR_BCLK_MASK 0x00000300 |
| 168 | #define TXX9_SIBGR_BCLK_T0 0x00000000 |
| 169 | #define TXX9_SIBGR_BCLK_T2 0x00000100 |
| 170 | #define TXX9_SIBGR_BCLK_T4 0x00000200 |
| 171 | #define TXX9_SIBGR_BCLK_T6 0x00000300 |
| 172 | #define TXX9_SIBGR_BRD_MASK 0x000000ff |
| 173 | |
| 174 | static inline unsigned int sio_in(struct uart_txx9_port *up, int offset) |
| 175 | { |
| 176 | switch (up->port.iotype) { |
| 177 | default: |
Atsushi Nemoto | 83485f8 | 2006-03-22 00:07:45 -0800 | [diff] [blame] | 178 | return __raw_readl(up->port.membase + offset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 179 | case UPIO_PORT: |
| 180 | return inl(up->port.iobase + offset); |
| 181 | } |
| 182 | } |
| 183 | |
| 184 | static inline void |
| 185 | sio_out(struct uart_txx9_port *up, int offset, int value) |
| 186 | { |
| 187 | switch (up->port.iotype) { |
| 188 | default: |
Atsushi Nemoto | 83485f8 | 2006-03-22 00:07:45 -0800 | [diff] [blame] | 189 | __raw_writel(value, up->port.membase + offset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | break; |
| 191 | case UPIO_PORT: |
| 192 | outl(value, up->port.iobase + offset); |
| 193 | break; |
| 194 | } |
| 195 | } |
| 196 | |
| 197 | static inline void |
| 198 | sio_mask(struct uart_txx9_port *up, int offset, unsigned int value) |
| 199 | { |
| 200 | sio_out(up, offset, sio_in(up, offset) & ~value); |
| 201 | } |
| 202 | static inline void |
| 203 | sio_set(struct uart_txx9_port *up, int offset, unsigned int value) |
| 204 | { |
| 205 | sio_out(up, offset, sio_in(up, offset) | value); |
| 206 | } |
| 207 | |
| 208 | static inline void |
| 209 | sio_quot_set(struct uart_txx9_port *up, int quot) |
| 210 | { |
| 211 | quot >>= 1; |
| 212 | if (quot < 256) |
| 213 | sio_out(up, TXX9_SIBGR, quot | TXX9_SIBGR_BCLK_T0); |
| 214 | else if (quot < (256 << 2)) |
| 215 | sio_out(up, TXX9_SIBGR, (quot >> 2) | TXX9_SIBGR_BCLK_T2); |
| 216 | else if (quot < (256 << 4)) |
| 217 | sio_out(up, TXX9_SIBGR, (quot >> 4) | TXX9_SIBGR_BCLK_T4); |
| 218 | else if (quot < (256 << 6)) |
| 219 | sio_out(up, TXX9_SIBGR, (quot >> 6) | TXX9_SIBGR_BCLK_T6); |
| 220 | else |
| 221 | sio_out(up, TXX9_SIBGR, 0xff | TXX9_SIBGR_BCLK_T6); |
| 222 | } |
| 223 | |
Atsushi Nemoto | aa76224 | 2009-10-01 15:44:22 -0700 | [diff] [blame] | 224 | static struct uart_txx9_port *to_uart_txx9_port(struct uart_port *port) |
| 225 | { |
| 226 | return container_of(port, struct uart_txx9_port, port); |
| 227 | } |
| 228 | |
Russell King | b129a8c | 2005-08-31 10:12:14 +0100 | [diff] [blame] | 229 | static void serial_txx9_stop_tx(struct uart_port *port) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 230 | { |
Atsushi Nemoto | aa76224 | 2009-10-01 15:44:22 -0700 | [diff] [blame] | 231 | struct uart_txx9_port *up = to_uart_txx9_port(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 232 | sio_mask(up, TXX9_SIDICR, TXX9_SIDICR_TIE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 233 | } |
| 234 | |
Russell King | b129a8c | 2005-08-31 10:12:14 +0100 | [diff] [blame] | 235 | static void serial_txx9_start_tx(struct uart_port *port) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | { |
Atsushi Nemoto | aa76224 | 2009-10-01 15:44:22 -0700 | [diff] [blame] | 237 | struct uart_txx9_port *up = to_uart_txx9_port(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | sio_set(up, TXX9_SIDICR, TXX9_SIDICR_TIE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 239 | } |
| 240 | |
| 241 | static void serial_txx9_stop_rx(struct uart_port *port) |
| 242 | { |
Atsushi Nemoto | aa76224 | 2009-10-01 15:44:22 -0700 | [diff] [blame] | 243 | struct uart_txx9_port *up = to_uart_txx9_port(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | up->port.read_status_mask &= ~TXX9_SIDISR_RDIS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | } |
| 246 | |
| 247 | static void serial_txx9_enable_ms(struct uart_port *port) |
| 248 | { |
| 249 | /* TXX9-SIO can not control DTR... */ |
| 250 | } |
| 251 | |
Atsushi Nemoto | 0970769 | 2007-02-22 02:17:28 +0900 | [diff] [blame] | 252 | static void serial_txx9_initialize(struct uart_port *port) |
| 253 | { |
Atsushi Nemoto | aa76224 | 2009-10-01 15:44:22 -0700 | [diff] [blame] | 254 | struct uart_txx9_port *up = to_uart_txx9_port(port); |
Atsushi Nemoto | 0970769 | 2007-02-22 02:17:28 +0900 | [diff] [blame] | 255 | unsigned int tmout = 10000; |
| 256 | |
| 257 | sio_out(up, TXX9_SIFCR, TXX9_SIFCR_SWRST); |
| 258 | /* TX4925 BUG WORKAROUND. Accessing SIOC register |
| 259 | * immediately after soft reset causes bus error. */ |
| 260 | mmiowb(); |
| 261 | udelay(1); |
| 262 | while ((sio_in(up, TXX9_SIFCR) & TXX9_SIFCR_SWRST) && --tmout) |
| 263 | udelay(1); |
| 264 | /* TX Int by FIFO Empty, RX Int by Receiving 1 char. */ |
| 265 | sio_set(up, TXX9_SIFCR, |
| 266 | TXX9_SIFCR_TDIL_MAX | TXX9_SIFCR_RDIL_1); |
| 267 | /* initial settings */ |
| 268 | sio_out(up, TXX9_SILCR, |
| 269 | TXX9_SILCR_UMODE_8BIT | TXX9_SILCR_USBL_1BIT | |
| 270 | ((up->port.flags & UPF_TXX9_USE_SCLK) ? |
| 271 | TXX9_SILCR_SCS_SCLK_BG : TXX9_SILCR_SCS_IMCLK_BG)); |
| 272 | sio_quot_set(up, uart_get_divisor(port, 9600)); |
| 273 | sio_out(up, TXX9_SIFLCR, TXX9_SIFLCR_RTSTL_MAX /* 15 */); |
| 274 | sio_out(up, TXX9_SIDICR, 0); |
| 275 | } |
| 276 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | static inline void |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 278 | receive_chars(struct uart_txx9_port *up, unsigned int *status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 279 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | unsigned char ch; |
| 281 | unsigned int disr = *status; |
| 282 | int max_count = 256; |
| 283 | char flag; |
Atsushi Nemoto | 83485f8 | 2006-03-22 00:07:45 -0800 | [diff] [blame] | 284 | unsigned int next_ignore_status_mask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 285 | |
| 286 | do { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | ch = sio_in(up, TXX9_SIRFIFO); |
| 288 | flag = TTY_NORMAL; |
| 289 | up->port.icount.rx++; |
| 290 | |
Atsushi Nemoto | 83485f8 | 2006-03-22 00:07:45 -0800 | [diff] [blame] | 291 | /* mask out RFDN_MASK bit added by previous overrun */ |
| 292 | next_ignore_status_mask = |
| 293 | up->port.ignore_status_mask & ~TXX9_SIDISR_RFDN_MASK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 294 | if (unlikely(disr & (TXX9_SIDISR_UBRK | TXX9_SIDISR_UPER | |
| 295 | TXX9_SIDISR_UFER | TXX9_SIDISR_UOER))) { |
| 296 | /* |
| 297 | * For statistics only |
| 298 | */ |
| 299 | if (disr & TXX9_SIDISR_UBRK) { |
| 300 | disr &= ~(TXX9_SIDISR_UFER | TXX9_SIDISR_UPER); |
| 301 | up->port.icount.brk++; |
| 302 | /* |
| 303 | * We do the SysRQ and SAK checking |
| 304 | * here because otherwise the break |
| 305 | * may get masked by ignore_status_mask |
| 306 | * or read_status_mask. |
| 307 | */ |
| 308 | if (uart_handle_break(&up->port)) |
| 309 | goto ignore_char; |
| 310 | } else if (disr & TXX9_SIDISR_UPER) |
| 311 | up->port.icount.parity++; |
| 312 | else if (disr & TXX9_SIDISR_UFER) |
| 313 | up->port.icount.frame++; |
Atsushi Nemoto | 83485f8 | 2006-03-22 00:07:45 -0800 | [diff] [blame] | 314 | if (disr & TXX9_SIDISR_UOER) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | up->port.icount.overrun++; |
Atsushi Nemoto | 83485f8 | 2006-03-22 00:07:45 -0800 | [diff] [blame] | 316 | /* |
| 317 | * The receiver read buffer still hold |
| 318 | * a char which caused overrun. |
| 319 | * Ignore next char by adding RFDN_MASK |
| 320 | * to ignore_status_mask temporarily. |
| 321 | */ |
| 322 | next_ignore_status_mask |= |
| 323 | TXX9_SIDISR_RFDN_MASK; |
| 324 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 325 | |
| 326 | /* |
| 327 | * Mask off conditions which should be ingored. |
| 328 | */ |
| 329 | disr &= up->port.read_status_mask; |
| 330 | |
| 331 | if (disr & TXX9_SIDISR_UBRK) { |
| 332 | flag = TTY_BREAK; |
| 333 | } else if (disr & TXX9_SIDISR_UPER) |
| 334 | flag = TTY_PARITY; |
| 335 | else if (disr & TXX9_SIDISR_UFER) |
| 336 | flag = TTY_FRAME; |
| 337 | } |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 338 | if (uart_handle_sysrq_char(&up->port, ch)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 339 | goto ignore_char; |
Russell King | 05ab301 | 2005-05-09 23:21:59 +0100 | [diff] [blame] | 340 | |
| 341 | uart_insert_char(&up->port, disr, TXX9_SIDISR_UOER, ch, flag); |
| 342 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 343 | ignore_char: |
Atsushi Nemoto | 83485f8 | 2006-03-22 00:07:45 -0800 | [diff] [blame] | 344 | up->port.ignore_status_mask = next_ignore_status_mask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 345 | disr = sio_in(up, TXX9_SIDISR); |
| 346 | } while (!(disr & TXX9_SIDISR_UVALID) && (max_count-- > 0)); |
Ralf Baechle | f5ee56c | 2005-09-09 13:01:32 -0700 | [diff] [blame] | 347 | spin_unlock(&up->port.lock); |
Jiri Slaby | 2e124b4 | 2013-01-03 15:53:06 +0100 | [diff] [blame] | 348 | tty_flip_buffer_push(&up->port.state->port); |
Ralf Baechle | f5ee56c | 2005-09-09 13:01:32 -0700 | [diff] [blame] | 349 | spin_lock(&up->port.lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 350 | *status = disr; |
| 351 | } |
| 352 | |
| 353 | static inline void transmit_chars(struct uart_txx9_port *up) |
| 354 | { |
Alan Cox | ebd2c8f | 2009-09-19 13:13:28 -0700 | [diff] [blame] | 355 | struct circ_buf *xmit = &up->port.state->xmit; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 356 | int count; |
| 357 | |
| 358 | if (up->port.x_char) { |
| 359 | sio_out(up, TXX9_SITFIFO, up->port.x_char); |
| 360 | up->port.icount.tx++; |
| 361 | up->port.x_char = 0; |
| 362 | return; |
| 363 | } |
| 364 | if (uart_circ_empty(xmit) || uart_tx_stopped(&up->port)) { |
Russell King | b129a8c | 2005-08-31 10:12:14 +0100 | [diff] [blame] | 365 | serial_txx9_stop_tx(&up->port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 366 | return; |
| 367 | } |
| 368 | |
| 369 | count = TXX9_SIO_TX_FIFO; |
| 370 | do { |
| 371 | sio_out(up, TXX9_SITFIFO, xmit->buf[xmit->tail]); |
| 372 | xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); |
| 373 | up->port.icount.tx++; |
| 374 | if (uart_circ_empty(xmit)) |
| 375 | break; |
| 376 | } while (--count > 0); |
| 377 | |
| 378 | if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) |
| 379 | uart_write_wakeup(&up->port); |
| 380 | |
| 381 | if (uart_circ_empty(xmit)) |
Russell King | b129a8c | 2005-08-31 10:12:14 +0100 | [diff] [blame] | 382 | serial_txx9_stop_tx(&up->port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 383 | } |
| 384 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 385 | static irqreturn_t serial_txx9_interrupt(int irq, void *dev_id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 386 | { |
| 387 | int pass_counter = 0; |
| 388 | struct uart_txx9_port *up = dev_id; |
| 389 | unsigned int status; |
| 390 | |
| 391 | while (1) { |
| 392 | spin_lock(&up->port.lock); |
| 393 | status = sio_in(up, TXX9_SIDISR); |
| 394 | if (!(sio_in(up, TXX9_SIDICR) & TXX9_SIDICR_TIE)) |
| 395 | status &= ~TXX9_SIDISR_TDIS; |
| 396 | if (!(status & (TXX9_SIDISR_TDIS | TXX9_SIDISR_RDIS | |
| 397 | TXX9_SIDISR_TOUT))) { |
| 398 | spin_unlock(&up->port.lock); |
| 399 | break; |
| 400 | } |
| 401 | |
| 402 | if (status & TXX9_SIDISR_RDIS) |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 403 | receive_chars(up, &status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 404 | if (status & TXX9_SIDISR_TDIS) |
| 405 | transmit_chars(up); |
| 406 | /* Clear TX/RX Int. Status */ |
| 407 | sio_mask(up, TXX9_SIDISR, |
| 408 | TXX9_SIDISR_TDIS | TXX9_SIDISR_RDIS | |
| 409 | TXX9_SIDISR_TOUT); |
| 410 | spin_unlock(&up->port.lock); |
| 411 | |
| 412 | if (pass_counter++ > PASS_LIMIT) |
| 413 | break; |
| 414 | } |
| 415 | |
| 416 | return pass_counter ? IRQ_HANDLED : IRQ_NONE; |
| 417 | } |
| 418 | |
| 419 | static unsigned int serial_txx9_tx_empty(struct uart_port *port) |
| 420 | { |
Atsushi Nemoto | aa76224 | 2009-10-01 15:44:22 -0700 | [diff] [blame] | 421 | struct uart_txx9_port *up = to_uart_txx9_port(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 422 | unsigned long flags; |
| 423 | unsigned int ret; |
| 424 | |
| 425 | spin_lock_irqsave(&up->port.lock, flags); |
| 426 | ret = (sio_in(up, TXX9_SICISR) & TXX9_SICISR_TXALS) ? TIOCSER_TEMT : 0; |
| 427 | spin_unlock_irqrestore(&up->port.lock, flags); |
| 428 | |
| 429 | return ret; |
| 430 | } |
| 431 | |
| 432 | static unsigned int serial_txx9_get_mctrl(struct uart_port *port) |
| 433 | { |
Atsushi Nemoto | aa76224 | 2009-10-01 15:44:22 -0700 | [diff] [blame] | 434 | struct uart_txx9_port *up = to_uart_txx9_port(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 435 | unsigned int ret; |
| 436 | |
Atsushi Nemoto | 9999996 | 2007-08-22 14:01:15 -0700 | [diff] [blame] | 437 | /* no modem control lines */ |
| 438 | ret = TIOCM_CAR | TIOCM_DSR; |
| 439 | ret |= (sio_in(up, TXX9_SIFLCR) & TXX9_SIFLCR_RTSSC) ? 0 : TIOCM_RTS; |
| 440 | ret |= (sio_in(up, TXX9_SICISR) & TXX9_SICISR_CTSS) ? 0 : TIOCM_CTS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 441 | |
| 442 | return ret; |
| 443 | } |
| 444 | |
| 445 | static void serial_txx9_set_mctrl(struct uart_port *port, unsigned int mctrl) |
| 446 | { |
Atsushi Nemoto | aa76224 | 2009-10-01 15:44:22 -0700 | [diff] [blame] | 447 | struct uart_txx9_port *up = to_uart_txx9_port(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 448 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 449 | if (mctrl & TIOCM_RTS) |
| 450 | sio_mask(up, TXX9_SIFLCR, TXX9_SIFLCR_RTSSC); |
| 451 | else |
| 452 | sio_set(up, TXX9_SIFLCR, TXX9_SIFLCR_RTSSC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 453 | } |
| 454 | |
| 455 | static void serial_txx9_break_ctl(struct uart_port *port, int break_state) |
| 456 | { |
Atsushi Nemoto | aa76224 | 2009-10-01 15:44:22 -0700 | [diff] [blame] | 457 | struct uart_txx9_port *up = to_uart_txx9_port(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 458 | unsigned long flags; |
| 459 | |
| 460 | spin_lock_irqsave(&up->port.lock, flags); |
| 461 | if (break_state == -1) |
| 462 | sio_set(up, TXX9_SIFLCR, TXX9_SIFLCR_TBRK); |
| 463 | else |
| 464 | sio_mask(up, TXX9_SIFLCR, TXX9_SIFLCR_TBRK); |
| 465 | spin_unlock_irqrestore(&up->port.lock, flags); |
| 466 | } |
| 467 | |
Randy Dunlap | f109293 | 2012-06-05 09:46:07 -0700 | [diff] [blame] | 468 | #if defined(CONFIG_SERIAL_TXX9_CONSOLE) || defined(CONFIG_CONSOLE_POLL) |
Atsushi Nemoto | a10b32d | 2009-06-24 18:34:34 +0100 | [diff] [blame] | 469 | /* |
| 470 | * Wait for transmitter & holding register to empty |
| 471 | */ |
| 472 | static void wait_for_xmitr(struct uart_txx9_port *up) |
| 473 | { |
| 474 | unsigned int tmout = 10000; |
| 475 | |
| 476 | /* Wait up to 10ms for the character(s) to be sent. */ |
| 477 | while (--tmout && |
| 478 | !(sio_in(up, TXX9_SICISR) & TXX9_SICISR_TXALS)) |
| 479 | udelay(1); |
| 480 | |
| 481 | /* Wait up to 1s for flow control if necessary */ |
| 482 | if (up->port.flags & UPF_CONS_FLOW) { |
| 483 | tmout = 1000000; |
| 484 | while (--tmout && |
| 485 | (sio_in(up, TXX9_SICISR) & TXX9_SICISR_CTSS)) |
| 486 | udelay(1); |
| 487 | } |
| 488 | } |
| 489 | #endif |
| 490 | |
| 491 | #ifdef CONFIG_CONSOLE_POLL |
| 492 | /* |
| 493 | * Console polling routines for writing and reading from the uart while |
| 494 | * in an interrupt or debug context. |
| 495 | */ |
| 496 | |
| 497 | static int serial_txx9_get_poll_char(struct uart_port *port) |
| 498 | { |
| 499 | unsigned int ier; |
| 500 | unsigned char c; |
Atsushi Nemoto | aa76224 | 2009-10-01 15:44:22 -0700 | [diff] [blame] | 501 | struct uart_txx9_port *up = to_uart_txx9_port(port); |
Atsushi Nemoto | a10b32d | 2009-06-24 18:34:34 +0100 | [diff] [blame] | 502 | |
| 503 | /* |
| 504 | * First save the IER then disable the interrupts |
| 505 | */ |
| 506 | ier = sio_in(up, TXX9_SIDICR); |
| 507 | sio_out(up, TXX9_SIDICR, 0); |
| 508 | |
| 509 | while (sio_in(up, TXX9_SIDISR) & TXX9_SIDISR_UVALID) |
| 510 | ; |
| 511 | |
| 512 | c = sio_in(up, TXX9_SIRFIFO); |
| 513 | |
| 514 | /* |
| 515 | * Finally, clear RX interrupt status |
| 516 | * and restore the IER |
| 517 | */ |
| 518 | sio_mask(up, TXX9_SIDISR, TXX9_SIDISR_RDIS); |
| 519 | sio_out(up, TXX9_SIDICR, ier); |
| 520 | return c; |
| 521 | } |
| 522 | |
| 523 | |
| 524 | static void serial_txx9_put_poll_char(struct uart_port *port, unsigned char c) |
| 525 | { |
| 526 | unsigned int ier; |
Atsushi Nemoto | aa76224 | 2009-10-01 15:44:22 -0700 | [diff] [blame] | 527 | struct uart_txx9_port *up = to_uart_txx9_port(port); |
Atsushi Nemoto | a10b32d | 2009-06-24 18:34:34 +0100 | [diff] [blame] | 528 | |
| 529 | /* |
| 530 | * First save the IER then disable the interrupts |
| 531 | */ |
| 532 | ier = sio_in(up, TXX9_SIDICR); |
| 533 | sio_out(up, TXX9_SIDICR, 0); |
| 534 | |
| 535 | wait_for_xmitr(up); |
| 536 | /* |
| 537 | * Send the character out. |
| 538 | * If a LF, also do CR... |
| 539 | */ |
| 540 | sio_out(up, TXX9_SITFIFO, c); |
| 541 | if (c == 10) { |
| 542 | wait_for_xmitr(up); |
| 543 | sio_out(up, TXX9_SITFIFO, 13); |
| 544 | } |
| 545 | |
| 546 | /* |
| 547 | * Finally, wait for transmitter to become empty |
| 548 | * and restore the IER |
| 549 | */ |
| 550 | wait_for_xmitr(up); |
| 551 | sio_out(up, TXX9_SIDICR, ier); |
| 552 | } |
| 553 | |
| 554 | #endif /* CONFIG_CONSOLE_POLL */ |
| 555 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 556 | static int serial_txx9_startup(struct uart_port *port) |
| 557 | { |
Atsushi Nemoto | aa76224 | 2009-10-01 15:44:22 -0700 | [diff] [blame] | 558 | struct uart_txx9_port *up = to_uart_txx9_port(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 559 | unsigned long flags; |
| 560 | int retval; |
| 561 | |
| 562 | /* |
| 563 | * Clear the FIFO buffers and disable them. |
Alexey Dobriyan | 7f927fc | 2006-03-28 01:56:53 -0800 | [diff] [blame] | 564 | * (they will be reenabled in set_termios()) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 565 | */ |
| 566 | sio_set(up, TXX9_SIFCR, |
| 567 | TXX9_SIFCR_TFRST | TXX9_SIFCR_RFRST | TXX9_SIFCR_FRSTE); |
| 568 | /* clear reset */ |
| 569 | sio_mask(up, TXX9_SIFCR, |
| 570 | TXX9_SIFCR_TFRST | TXX9_SIFCR_RFRST | TXX9_SIFCR_FRSTE); |
| 571 | sio_out(up, TXX9_SIDICR, 0); |
| 572 | |
| 573 | /* |
| 574 | * Clear the interrupt registers. |
| 575 | */ |
| 576 | sio_out(up, TXX9_SIDISR, 0); |
| 577 | |
| 578 | retval = request_irq(up->port.irq, serial_txx9_interrupt, |
Thomas Gleixner | 40663cc | 2006-07-01 19:29:43 -0700 | [diff] [blame] | 579 | IRQF_SHARED, "serial_txx9", up); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 580 | if (retval) |
| 581 | return retval; |
| 582 | |
| 583 | /* |
| 584 | * Now, initialize the UART |
| 585 | */ |
| 586 | spin_lock_irqsave(&up->port.lock, flags); |
| 587 | serial_txx9_set_mctrl(&up->port, up->port.mctrl); |
| 588 | spin_unlock_irqrestore(&up->port.lock, flags); |
| 589 | |
| 590 | /* Enable RX/TX */ |
| 591 | sio_mask(up, TXX9_SIFLCR, TXX9_SIFLCR_RSDE | TXX9_SIFLCR_TSDE); |
| 592 | |
| 593 | /* |
| 594 | * Finally, enable interrupts. |
| 595 | */ |
| 596 | sio_set(up, TXX9_SIDICR, TXX9_SIDICR_RIE); |
| 597 | |
| 598 | return 0; |
| 599 | } |
| 600 | |
| 601 | static void serial_txx9_shutdown(struct uart_port *port) |
| 602 | { |
Atsushi Nemoto | aa76224 | 2009-10-01 15:44:22 -0700 | [diff] [blame] | 603 | struct uart_txx9_port *up = to_uart_txx9_port(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 604 | unsigned long flags; |
| 605 | |
| 606 | /* |
| 607 | * Disable interrupts from this port |
| 608 | */ |
| 609 | sio_out(up, TXX9_SIDICR, 0); /* disable all intrs */ |
| 610 | |
| 611 | spin_lock_irqsave(&up->port.lock, flags); |
| 612 | serial_txx9_set_mctrl(&up->port, up->port.mctrl); |
| 613 | spin_unlock_irqrestore(&up->port.lock, flags); |
| 614 | |
| 615 | /* |
| 616 | * Disable break condition |
| 617 | */ |
| 618 | sio_mask(up, TXX9_SIFLCR, TXX9_SIFLCR_TBRK); |
| 619 | |
| 620 | #ifdef CONFIG_SERIAL_TXX9_CONSOLE |
| 621 | if (up->port.cons && up->port.line == up->port.cons->index) { |
| 622 | free_irq(up->port.irq, up); |
| 623 | return; |
| 624 | } |
| 625 | #endif |
| 626 | /* reset FIFOs */ |
| 627 | sio_set(up, TXX9_SIFCR, |
| 628 | TXX9_SIFCR_TFRST | TXX9_SIFCR_RFRST | TXX9_SIFCR_FRSTE); |
| 629 | /* clear reset */ |
| 630 | sio_mask(up, TXX9_SIFCR, |
| 631 | TXX9_SIFCR_TFRST | TXX9_SIFCR_RFRST | TXX9_SIFCR_FRSTE); |
| 632 | |
| 633 | /* Disable RX/TX */ |
| 634 | sio_set(up, TXX9_SIFLCR, TXX9_SIFLCR_RSDE | TXX9_SIFLCR_TSDE); |
| 635 | |
| 636 | free_irq(up->port.irq, up); |
| 637 | } |
| 638 | |
| 639 | static void |
Alan Cox | 606d099 | 2006-12-08 02:38:45 -0800 | [diff] [blame] | 640 | serial_txx9_set_termios(struct uart_port *port, struct ktermios *termios, |
| 641 | struct ktermios *old) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 642 | { |
Atsushi Nemoto | aa76224 | 2009-10-01 15:44:22 -0700 | [diff] [blame] | 643 | struct uart_txx9_port *up = to_uart_txx9_port(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 644 | unsigned int cval, fcr = 0; |
| 645 | unsigned long flags; |
| 646 | unsigned int baud, quot; |
| 647 | |
Atsushi Nemoto | 9999996 | 2007-08-22 14:01:15 -0700 | [diff] [blame] | 648 | /* |
| 649 | * We don't support modem control lines. |
| 650 | */ |
| 651 | termios->c_cflag &= ~(HUPCL | CMSPAR); |
| 652 | termios->c_cflag |= CLOCAL; |
| 653 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 654 | cval = sio_in(up, TXX9_SILCR); |
| 655 | /* byte size and parity */ |
| 656 | cval &= ~TXX9_SILCR_UMODE_MASK; |
| 657 | switch (termios->c_cflag & CSIZE) { |
| 658 | case CS7: |
| 659 | cval |= TXX9_SILCR_UMODE_7BIT; |
| 660 | break; |
| 661 | default: |
| 662 | case CS5: /* not supported */ |
| 663 | case CS6: /* not supported */ |
| 664 | case CS8: |
| 665 | cval |= TXX9_SILCR_UMODE_8BIT; |
| 666 | break; |
| 667 | } |
| 668 | |
| 669 | cval &= ~TXX9_SILCR_USBL_MASK; |
| 670 | if (termios->c_cflag & CSTOPB) |
| 671 | cval |= TXX9_SILCR_USBL_2BIT; |
| 672 | else |
| 673 | cval |= TXX9_SILCR_USBL_1BIT; |
| 674 | cval &= ~(TXX9_SILCR_UPEN | TXX9_SILCR_UEPS); |
| 675 | if (termios->c_cflag & PARENB) |
| 676 | cval |= TXX9_SILCR_UPEN; |
| 677 | if (!(termios->c_cflag & PARODD)) |
| 678 | cval |= TXX9_SILCR_UEPS; |
| 679 | |
| 680 | /* |
| 681 | * Ask the core to calculate the divisor for us. |
| 682 | */ |
| 683 | baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16/2); |
| 684 | quot = uart_get_divisor(port, baud); |
| 685 | |
| 686 | /* Set up FIFOs */ |
| 687 | /* TX Int by FIFO Empty, RX Int by Receiving 1 char. */ |
| 688 | fcr = TXX9_SIFCR_TDIL_MAX | TXX9_SIFCR_RDIL_1; |
| 689 | |
| 690 | /* |
| 691 | * Ok, we're now changing the port state. Do it with |
| 692 | * interrupts disabled. |
| 693 | */ |
| 694 | spin_lock_irqsave(&up->port.lock, flags); |
| 695 | |
| 696 | /* |
| 697 | * Update the per-port timeout. |
| 698 | */ |
| 699 | uart_update_timeout(port, termios->c_cflag, baud); |
| 700 | |
| 701 | up->port.read_status_mask = TXX9_SIDISR_UOER | |
| 702 | TXX9_SIDISR_TDIS | TXX9_SIDISR_RDIS; |
| 703 | if (termios->c_iflag & INPCK) |
| 704 | up->port.read_status_mask |= TXX9_SIDISR_UFER | TXX9_SIDISR_UPER; |
| 705 | if (termios->c_iflag & (BRKINT | PARMRK)) |
| 706 | up->port.read_status_mask |= TXX9_SIDISR_UBRK; |
| 707 | |
| 708 | /* |
| 709 | * Characteres to ignore |
| 710 | */ |
| 711 | up->port.ignore_status_mask = 0; |
| 712 | if (termios->c_iflag & IGNPAR) |
| 713 | up->port.ignore_status_mask |= TXX9_SIDISR_UPER | TXX9_SIDISR_UFER; |
| 714 | if (termios->c_iflag & IGNBRK) { |
| 715 | up->port.ignore_status_mask |= TXX9_SIDISR_UBRK; |
| 716 | /* |
| 717 | * If we're ignoring parity and break indicators, |
| 718 | * ignore overruns too (for real raw support). |
| 719 | */ |
| 720 | if (termios->c_iflag & IGNPAR) |
| 721 | up->port.ignore_status_mask |= TXX9_SIDISR_UOER; |
| 722 | } |
| 723 | |
| 724 | /* |
| 725 | * ignore all characters if CREAD is not set |
| 726 | */ |
| 727 | if ((termios->c_cflag & CREAD) == 0) |
| 728 | up->port.ignore_status_mask |= TXX9_SIDISR_RDIS; |
| 729 | |
| 730 | /* CTS flow control flag */ |
| 731 | if ((termios->c_cflag & CRTSCTS) && |
| 732 | (up->port.flags & UPF_TXX9_HAVE_CTS_LINE)) { |
| 733 | sio_set(up, TXX9_SIFLCR, |
| 734 | TXX9_SIFLCR_RCS | TXX9_SIFLCR_TES); |
| 735 | } else { |
| 736 | sio_mask(up, TXX9_SIFLCR, |
| 737 | TXX9_SIFLCR_RCS | TXX9_SIFLCR_TES); |
| 738 | } |
| 739 | |
| 740 | sio_out(up, TXX9_SILCR, cval); |
| 741 | sio_quot_set(up, quot); |
| 742 | sio_out(up, TXX9_SIFCR, fcr); |
| 743 | |
| 744 | serial_txx9_set_mctrl(&up->port, up->port.mctrl); |
| 745 | spin_unlock_irqrestore(&up->port.lock, flags); |
| 746 | } |
| 747 | |
| 748 | static void |
| 749 | serial_txx9_pm(struct uart_port *port, unsigned int state, |
| 750 | unsigned int oldstate) |
| 751 | { |
Atsushi Nemoto | 23f42b7 | 2007-10-29 14:37:23 -0700 | [diff] [blame] | 752 | /* |
| 753 | * If oldstate was -1 this is called from |
| 754 | * uart_configure_port(). In this case do not initialize the |
| 755 | * port now, because the port was already initialized (for |
| 756 | * non-console port) or should not be initialized here (for |
| 757 | * console port). If we initialized the port here we lose |
| 758 | * serial console settings. |
| 759 | */ |
| 760 | if (state == 0 && oldstate != -1) |
Atsushi Nemoto | 0970769 | 2007-02-22 02:17:28 +0900 | [diff] [blame] | 761 | serial_txx9_initialize(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 762 | } |
| 763 | |
| 764 | static int serial_txx9_request_resource(struct uart_txx9_port *up) |
| 765 | { |
| 766 | unsigned int size = TXX9_REGION_SIZE; |
| 767 | int ret = 0; |
| 768 | |
| 769 | switch (up->port.iotype) { |
| 770 | default: |
| 771 | if (!up->port.mapbase) |
| 772 | break; |
| 773 | |
| 774 | if (!request_mem_region(up->port.mapbase, size, "serial_txx9")) { |
| 775 | ret = -EBUSY; |
| 776 | break; |
| 777 | } |
| 778 | |
| 779 | if (up->port.flags & UPF_IOREMAP) { |
| 780 | up->port.membase = ioremap(up->port.mapbase, size); |
| 781 | if (!up->port.membase) { |
| 782 | release_mem_region(up->port.mapbase, size); |
| 783 | ret = -ENOMEM; |
| 784 | } |
| 785 | } |
| 786 | break; |
| 787 | |
| 788 | case UPIO_PORT: |
| 789 | if (!request_region(up->port.iobase, size, "serial_txx9")) |
| 790 | ret = -EBUSY; |
| 791 | break; |
| 792 | } |
| 793 | return ret; |
| 794 | } |
| 795 | |
| 796 | static void serial_txx9_release_resource(struct uart_txx9_port *up) |
| 797 | { |
| 798 | unsigned int size = TXX9_REGION_SIZE; |
| 799 | |
| 800 | switch (up->port.iotype) { |
| 801 | default: |
| 802 | if (!up->port.mapbase) |
| 803 | break; |
| 804 | |
| 805 | if (up->port.flags & UPF_IOREMAP) { |
| 806 | iounmap(up->port.membase); |
| 807 | up->port.membase = NULL; |
| 808 | } |
| 809 | |
| 810 | release_mem_region(up->port.mapbase, size); |
| 811 | break; |
| 812 | |
| 813 | case UPIO_PORT: |
| 814 | release_region(up->port.iobase, size); |
| 815 | break; |
| 816 | } |
| 817 | } |
| 818 | |
| 819 | static void serial_txx9_release_port(struct uart_port *port) |
| 820 | { |
Atsushi Nemoto | aa76224 | 2009-10-01 15:44:22 -0700 | [diff] [blame] | 821 | struct uart_txx9_port *up = to_uart_txx9_port(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 822 | serial_txx9_release_resource(up); |
| 823 | } |
| 824 | |
| 825 | static int serial_txx9_request_port(struct uart_port *port) |
| 826 | { |
Atsushi Nemoto | aa76224 | 2009-10-01 15:44:22 -0700 | [diff] [blame] | 827 | struct uart_txx9_port *up = to_uart_txx9_port(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 828 | return serial_txx9_request_resource(up); |
| 829 | } |
| 830 | |
| 831 | static void serial_txx9_config_port(struct uart_port *port, int uflags) |
| 832 | { |
Atsushi Nemoto | aa76224 | 2009-10-01 15:44:22 -0700 | [diff] [blame] | 833 | struct uart_txx9_port *up = to_uart_txx9_port(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 834 | int ret; |
| 835 | |
| 836 | /* |
| 837 | * Find the region that we can probe for. This in turn |
| 838 | * tells us whether we can probe for the type of port. |
| 839 | */ |
| 840 | ret = serial_txx9_request_resource(up); |
| 841 | if (ret < 0) |
| 842 | return; |
| 843 | port->type = PORT_TXX9; |
| 844 | up->port.fifosize = TXX9_SIO_TX_FIFO; |
| 845 | |
| 846 | #ifdef CONFIG_SERIAL_TXX9_CONSOLE |
| 847 | if (up->port.line == up->port.cons->index) |
| 848 | return; |
| 849 | #endif |
Atsushi Nemoto | 0970769 | 2007-02-22 02:17:28 +0900 | [diff] [blame] | 850 | serial_txx9_initialize(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 851 | } |
| 852 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 853 | static const char * |
| 854 | serial_txx9_type(struct uart_port *port) |
| 855 | { |
| 856 | return "txx9"; |
| 857 | } |
| 858 | |
| 859 | static struct uart_ops serial_txx9_pops = { |
| 860 | .tx_empty = serial_txx9_tx_empty, |
| 861 | .set_mctrl = serial_txx9_set_mctrl, |
| 862 | .get_mctrl = serial_txx9_get_mctrl, |
| 863 | .stop_tx = serial_txx9_stop_tx, |
| 864 | .start_tx = serial_txx9_start_tx, |
| 865 | .stop_rx = serial_txx9_stop_rx, |
| 866 | .enable_ms = serial_txx9_enable_ms, |
| 867 | .break_ctl = serial_txx9_break_ctl, |
| 868 | .startup = serial_txx9_startup, |
| 869 | .shutdown = serial_txx9_shutdown, |
| 870 | .set_termios = serial_txx9_set_termios, |
| 871 | .pm = serial_txx9_pm, |
| 872 | .type = serial_txx9_type, |
| 873 | .release_port = serial_txx9_release_port, |
| 874 | .request_port = serial_txx9_request_port, |
| 875 | .config_port = serial_txx9_config_port, |
Atsushi Nemoto | a10b32d | 2009-06-24 18:34:34 +0100 | [diff] [blame] | 876 | #ifdef CONFIG_CONSOLE_POLL |
| 877 | .poll_get_char = serial_txx9_get_poll_char, |
| 878 | .poll_put_char = serial_txx9_put_poll_char, |
| 879 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 880 | }; |
| 881 | |
| 882 | static struct uart_txx9_port serial_txx9_ports[UART_NR]; |
| 883 | |
Atsushi Nemoto | 0970769 | 2007-02-22 02:17:28 +0900 | [diff] [blame] | 884 | static void __init serial_txx9_register_ports(struct uart_driver *drv, |
| 885 | struct device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 886 | { |
| 887 | int i; |
| 888 | |
| 889 | for (i = 0; i < UART_NR; i++) { |
| 890 | struct uart_txx9_port *up = &serial_txx9_ports[i]; |
| 891 | |
| 892 | up->port.line = i; |
| 893 | up->port.ops = &serial_txx9_pops; |
Atsushi Nemoto | 0970769 | 2007-02-22 02:17:28 +0900 | [diff] [blame] | 894 | up->port.dev = dev; |
Atsushi Nemoto | 83485f8 | 2006-03-22 00:07:45 -0800 | [diff] [blame] | 895 | if (up->port.iobase || up->port.mapbase) |
| 896 | uart_add_one_port(drv, &up->port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 897 | } |
| 898 | } |
| 899 | |
| 900 | #ifdef CONFIG_SERIAL_TXX9_CONSOLE |
| 901 | |
Russell King | d358788 | 2006-03-20 20:00:09 +0000 | [diff] [blame] | 902 | static void serial_txx9_console_putchar(struct uart_port *port, int ch) |
| 903 | { |
Atsushi Nemoto | aa76224 | 2009-10-01 15:44:22 -0700 | [diff] [blame] | 904 | struct uart_txx9_port *up = to_uart_txx9_port(port); |
Russell King | d358788 | 2006-03-20 20:00:09 +0000 | [diff] [blame] | 905 | |
| 906 | wait_for_xmitr(up); |
| 907 | sio_out(up, TXX9_SITFIFO, ch); |
| 908 | } |
| 909 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 910 | /* |
| 911 | * Print a string to the serial port trying not to disturb |
| 912 | * any possible real use of the port... |
| 913 | * |
| 914 | * The console_lock must be held when we get here. |
| 915 | */ |
| 916 | static void |
| 917 | serial_txx9_console_write(struct console *co, const char *s, unsigned int count) |
| 918 | { |
| 919 | struct uart_txx9_port *up = &serial_txx9_ports[co->index]; |
| 920 | unsigned int ier, flcr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 921 | |
| 922 | /* |
| 923 | * First save the UER then disable the interrupts |
| 924 | */ |
| 925 | ier = sio_in(up, TXX9_SIDICR); |
| 926 | sio_out(up, TXX9_SIDICR, 0); |
| 927 | /* |
| 928 | * Disable flow-control if enabled (and unnecessary) |
| 929 | */ |
| 930 | flcr = sio_in(up, TXX9_SIFLCR); |
| 931 | if (!(up->port.flags & UPF_CONS_FLOW) && (flcr & TXX9_SIFLCR_TES)) |
| 932 | sio_out(up, TXX9_SIFLCR, flcr & ~TXX9_SIFLCR_TES); |
| 933 | |
Russell King | d358788 | 2006-03-20 20:00:09 +0000 | [diff] [blame] | 934 | uart_console_write(&up->port, s, count, serial_txx9_console_putchar); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 935 | |
| 936 | /* |
| 937 | * Finally, wait for transmitter to become empty |
| 938 | * and restore the IER |
| 939 | */ |
| 940 | wait_for_xmitr(up); |
| 941 | sio_out(up, TXX9_SIFLCR, flcr); |
| 942 | sio_out(up, TXX9_SIDICR, ier); |
| 943 | } |
| 944 | |
Atsushi Nemoto | 0970769 | 2007-02-22 02:17:28 +0900 | [diff] [blame] | 945 | static int __init serial_txx9_console_setup(struct console *co, char *options) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 946 | { |
| 947 | struct uart_port *port; |
| 948 | struct uart_txx9_port *up; |
| 949 | int baud = 9600; |
| 950 | int bits = 8; |
| 951 | int parity = 'n'; |
| 952 | int flow = 'n'; |
| 953 | |
| 954 | /* |
| 955 | * Check whether an invalid uart number has been specified, and |
| 956 | * if so, search for the first available port that does have |
| 957 | * console support. |
| 958 | */ |
| 959 | if (co->index >= UART_NR) |
| 960 | co->index = 0; |
| 961 | up = &serial_txx9_ports[co->index]; |
| 962 | port = &up->port; |
| 963 | if (!port->ops) |
| 964 | return -ENODEV; |
| 965 | |
Atsushi Nemoto | 0970769 | 2007-02-22 02:17:28 +0900 | [diff] [blame] | 966 | serial_txx9_initialize(&up->port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 967 | |
| 968 | if (options) |
| 969 | uart_parse_options(options, &baud, &parity, &bits, &flow); |
| 970 | |
| 971 | return uart_set_options(port, co, baud, parity, bits, flow); |
| 972 | } |
| 973 | |
| 974 | static struct uart_driver serial_txx9_reg; |
| 975 | static struct console serial_txx9_console = { |
| 976 | .name = TXX9_TTY_NAME, |
| 977 | .write = serial_txx9_console_write, |
| 978 | .device = uart_console_device, |
| 979 | .setup = serial_txx9_console_setup, |
| 980 | .flags = CON_PRINTBUFFER, |
| 981 | .index = -1, |
| 982 | .data = &serial_txx9_reg, |
| 983 | }; |
| 984 | |
| 985 | static int __init serial_txx9_console_init(void) |
| 986 | { |
| 987 | register_console(&serial_txx9_console); |
| 988 | return 0; |
| 989 | } |
| 990 | console_initcall(serial_txx9_console_init); |
| 991 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 992 | #define SERIAL_TXX9_CONSOLE &serial_txx9_console |
| 993 | #else |
| 994 | #define SERIAL_TXX9_CONSOLE NULL |
| 995 | #endif |
| 996 | |
| 997 | static struct uart_driver serial_txx9_reg = { |
| 998 | .owner = THIS_MODULE, |
| 999 | .driver_name = "serial_txx9", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1000 | .dev_name = TXX9_TTY_NAME, |
| 1001 | .major = TXX9_TTY_MAJOR, |
| 1002 | .minor = TXX9_TTY_MINOR_START, |
| 1003 | .nr = UART_NR, |
| 1004 | .cons = SERIAL_TXX9_CONSOLE, |
| 1005 | }; |
| 1006 | |
| 1007 | int __init early_serial_txx9_setup(struct uart_port *port) |
| 1008 | { |
| 1009 | if (port->line >= ARRAY_SIZE(serial_txx9_ports)) |
| 1010 | return -ENODEV; |
| 1011 | |
| 1012 | serial_txx9_ports[port->line].port = *port; |
| 1013 | serial_txx9_ports[port->line].port.ops = &serial_txx9_pops; |
Atsushi Nemoto | 37a6c7d | 2007-10-16 01:24:02 -0700 | [diff] [blame] | 1014 | serial_txx9_ports[port->line].port.flags |= |
| 1015 | UPF_BOOT_AUTOCONF | UPF_FIXED_PORT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1016 | return 0; |
| 1017 | } |
| 1018 | |
Arjan van de Ven | f392ecf | 2006-01-12 18:44:32 +0000 | [diff] [blame] | 1019 | static DEFINE_MUTEX(serial_txx9_mutex); |
Ralf Baechle | f5ee56c | 2005-09-09 13:01:32 -0700 | [diff] [blame] | 1020 | |
| 1021 | /** |
| 1022 | * serial_txx9_register_port - register a serial port |
| 1023 | * @port: serial port template |
| 1024 | * |
| 1025 | * Configure the serial port specified by the request. |
| 1026 | * |
| 1027 | * The port is then probed and if necessary the IRQ is autodetected |
| 1028 | * If this fails an error is returned. |
| 1029 | * |
| 1030 | * On success the port is ready to use and the line number is returned. |
| 1031 | */ |
Bill Pemberton | 9671f09 | 2012-11-19 13:21:50 -0500 | [diff] [blame] | 1032 | static int serial_txx9_register_port(struct uart_port *port) |
Ralf Baechle | f5ee56c | 2005-09-09 13:01:32 -0700 | [diff] [blame] | 1033 | { |
| 1034 | int i; |
| 1035 | struct uart_txx9_port *uart; |
| 1036 | int ret = -ENOSPC; |
| 1037 | |
Arjan van de Ven | f392ecf | 2006-01-12 18:44:32 +0000 | [diff] [blame] | 1038 | mutex_lock(&serial_txx9_mutex); |
Ralf Baechle | f5ee56c | 2005-09-09 13:01:32 -0700 | [diff] [blame] | 1039 | for (i = 0; i < UART_NR; i++) { |
| 1040 | uart = &serial_txx9_ports[i]; |
Atsushi Nemoto | 0970769 | 2007-02-22 02:17:28 +0900 | [diff] [blame] | 1041 | if (uart_match_port(&uart->port, port)) { |
| 1042 | uart_remove_one_port(&serial_txx9_reg, &uart->port); |
Ralf Baechle | f5ee56c | 2005-09-09 13:01:32 -0700 | [diff] [blame] | 1043 | break; |
Atsushi Nemoto | 0970769 | 2007-02-22 02:17:28 +0900 | [diff] [blame] | 1044 | } |
| 1045 | } |
| 1046 | if (i == UART_NR) { |
| 1047 | /* Find unused port */ |
| 1048 | for (i = 0; i < UART_NR; i++) { |
| 1049 | uart = &serial_txx9_ports[i]; |
| 1050 | if (!(uart->port.iobase || uart->port.mapbase)) |
| 1051 | break; |
| 1052 | } |
Ralf Baechle | f5ee56c | 2005-09-09 13:01:32 -0700 | [diff] [blame] | 1053 | } |
| 1054 | if (i < UART_NR) { |
Ralf Baechle | f5ee56c | 2005-09-09 13:01:32 -0700 | [diff] [blame] | 1055 | uart->port.iobase = port->iobase; |
| 1056 | uart->port.membase = port->membase; |
| 1057 | uart->port.irq = port->irq; |
| 1058 | uart->port.uartclk = port->uartclk; |
| 1059 | uart->port.iotype = port->iotype; |
Atsushi Nemoto | 37a6c7d | 2007-10-16 01:24:02 -0700 | [diff] [blame] | 1060 | uart->port.flags = port->flags |
| 1061 | | UPF_BOOT_AUTOCONF | UPF_FIXED_PORT; |
Ralf Baechle | f5ee56c | 2005-09-09 13:01:32 -0700 | [diff] [blame] | 1062 | uart->port.mapbase = port->mapbase; |
| 1063 | if (port->dev) |
| 1064 | uart->port.dev = port->dev; |
| 1065 | ret = uart_add_one_port(&serial_txx9_reg, &uart->port); |
| 1066 | if (ret == 0) |
| 1067 | ret = uart->port.line; |
| 1068 | } |
Arjan van de Ven | f392ecf | 2006-01-12 18:44:32 +0000 | [diff] [blame] | 1069 | mutex_unlock(&serial_txx9_mutex); |
Ralf Baechle | f5ee56c | 2005-09-09 13:01:32 -0700 | [diff] [blame] | 1070 | return ret; |
| 1071 | } |
| 1072 | |
| 1073 | /** |
| 1074 | * serial_txx9_unregister_port - remove a txx9 serial port at runtime |
| 1075 | * @line: serial line number |
| 1076 | * |
| 1077 | * Remove one serial port. This may not be called from interrupt |
| 1078 | * context. We hand the port back to the our control. |
| 1079 | */ |
Bill Pemberton | ae8d8a1 | 2012-11-19 13:26:18 -0500 | [diff] [blame] | 1080 | static void serial_txx9_unregister_port(int line) |
Ralf Baechle | f5ee56c | 2005-09-09 13:01:32 -0700 | [diff] [blame] | 1081 | { |
| 1082 | struct uart_txx9_port *uart = &serial_txx9_ports[line]; |
| 1083 | |
Arjan van de Ven | f392ecf | 2006-01-12 18:44:32 +0000 | [diff] [blame] | 1084 | mutex_lock(&serial_txx9_mutex); |
Ralf Baechle | f5ee56c | 2005-09-09 13:01:32 -0700 | [diff] [blame] | 1085 | uart_remove_one_port(&serial_txx9_reg, &uart->port); |
| 1086 | uart->port.flags = 0; |
| 1087 | uart->port.type = PORT_UNKNOWN; |
| 1088 | uart->port.iobase = 0; |
| 1089 | uart->port.mapbase = 0; |
Atsushi Nemoto | 83485f8 | 2006-03-22 00:07:45 -0800 | [diff] [blame] | 1090 | uart->port.membase = NULL; |
Ralf Baechle | f5ee56c | 2005-09-09 13:01:32 -0700 | [diff] [blame] | 1091 | uart->port.dev = NULL; |
Arjan van de Ven | f392ecf | 2006-01-12 18:44:32 +0000 | [diff] [blame] | 1092 | mutex_unlock(&serial_txx9_mutex); |
Ralf Baechle | f5ee56c | 2005-09-09 13:01:32 -0700 | [diff] [blame] | 1093 | } |
| 1094 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1095 | /* |
Atsushi Nemoto | 0970769 | 2007-02-22 02:17:28 +0900 | [diff] [blame] | 1096 | * Register a set of serial devices attached to a platform device. |
| 1097 | */ |
Bill Pemberton | 9671f09 | 2012-11-19 13:21:50 -0500 | [diff] [blame] | 1098 | static int serial_txx9_probe(struct platform_device *dev) |
Atsushi Nemoto | 0970769 | 2007-02-22 02:17:28 +0900 | [diff] [blame] | 1099 | { |
Jingoo Han | 574de55 | 2013-07-30 17:06:57 +0900 | [diff] [blame] | 1100 | struct uart_port *p = dev_get_platdata(&dev->dev); |
Atsushi Nemoto | 0970769 | 2007-02-22 02:17:28 +0900 | [diff] [blame] | 1101 | struct uart_port port; |
| 1102 | int ret, i; |
| 1103 | |
| 1104 | memset(&port, 0, sizeof(struct uart_port)); |
| 1105 | for (i = 0; p && p->uartclk != 0; p++, i++) { |
| 1106 | port.iobase = p->iobase; |
| 1107 | port.membase = p->membase; |
| 1108 | port.irq = p->irq; |
| 1109 | port.uartclk = p->uartclk; |
| 1110 | port.iotype = p->iotype; |
| 1111 | port.flags = p->flags; |
| 1112 | port.mapbase = p->mapbase; |
| 1113 | port.dev = &dev->dev; |
| 1114 | ret = serial_txx9_register_port(&port); |
| 1115 | if (ret < 0) { |
| 1116 | dev_err(&dev->dev, "unable to register port at index %d " |
Atsushi Nemoto | 8433ac6 | 2008-10-18 20:25:53 -0700 | [diff] [blame] | 1117 | "(IO%lx MEM%llx IRQ%d): %d\n", i, |
Atsushi Nemoto | ddb437b | 2007-07-31 00:37:34 -0700 | [diff] [blame] | 1118 | p->iobase, (unsigned long long)p->mapbase, |
| 1119 | p->irq, ret); |
Atsushi Nemoto | 0970769 | 2007-02-22 02:17:28 +0900 | [diff] [blame] | 1120 | } |
| 1121 | } |
| 1122 | return 0; |
| 1123 | } |
| 1124 | |
| 1125 | /* |
| 1126 | * Remove serial ports registered against a platform device. |
| 1127 | */ |
Bill Pemberton | ae8d8a1 | 2012-11-19 13:26:18 -0500 | [diff] [blame] | 1128 | static int serial_txx9_remove(struct platform_device *dev) |
Atsushi Nemoto | 0970769 | 2007-02-22 02:17:28 +0900 | [diff] [blame] | 1129 | { |
| 1130 | int i; |
| 1131 | |
| 1132 | for (i = 0; i < UART_NR; i++) { |
| 1133 | struct uart_txx9_port *up = &serial_txx9_ports[i]; |
| 1134 | |
| 1135 | if (up->port.dev == &dev->dev) |
| 1136 | serial_txx9_unregister_port(i); |
| 1137 | } |
| 1138 | return 0; |
| 1139 | } |
| 1140 | |
| 1141 | #ifdef CONFIG_PM |
| 1142 | static int serial_txx9_suspend(struct platform_device *dev, pm_message_t state) |
| 1143 | { |
| 1144 | int i; |
| 1145 | |
| 1146 | for (i = 0; i < UART_NR; i++) { |
| 1147 | struct uart_txx9_port *up = &serial_txx9_ports[i]; |
| 1148 | |
| 1149 | if (up->port.type != PORT_UNKNOWN && up->port.dev == &dev->dev) |
| 1150 | uart_suspend_port(&serial_txx9_reg, &up->port); |
| 1151 | } |
| 1152 | |
| 1153 | return 0; |
| 1154 | } |
| 1155 | |
| 1156 | static int serial_txx9_resume(struct platform_device *dev) |
| 1157 | { |
| 1158 | int i; |
| 1159 | |
| 1160 | for (i = 0; i < UART_NR; i++) { |
| 1161 | struct uart_txx9_port *up = &serial_txx9_ports[i]; |
| 1162 | |
| 1163 | if (up->port.type != PORT_UNKNOWN && up->port.dev == &dev->dev) |
| 1164 | uart_resume_port(&serial_txx9_reg, &up->port); |
| 1165 | } |
| 1166 | |
| 1167 | return 0; |
| 1168 | } |
| 1169 | #endif |
| 1170 | |
| 1171 | static struct platform_driver serial_txx9_plat_driver = { |
| 1172 | .probe = serial_txx9_probe, |
Bill Pemberton | 2d47b71 | 2012-11-19 13:21:34 -0500 | [diff] [blame] | 1173 | .remove = serial_txx9_remove, |
Atsushi Nemoto | 0970769 | 2007-02-22 02:17:28 +0900 | [diff] [blame] | 1174 | #ifdef CONFIG_PM |
| 1175 | .suspend = serial_txx9_suspend, |
| 1176 | .resume = serial_txx9_resume, |
| 1177 | #endif |
| 1178 | .driver = { |
| 1179 | .name = "serial_txx9", |
| 1180 | .owner = THIS_MODULE, |
| 1181 | }, |
| 1182 | }; |
| 1183 | |
| 1184 | #ifdef ENABLE_SERIAL_TXX9_PCI |
| 1185 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1186 | * Probe one serial board. Unfortunately, there is no rhyme nor reason |
| 1187 | * to the arrangement of serial ports on a PCI card. |
| 1188 | */ |
Bill Pemberton | 9671f09 | 2012-11-19 13:21:50 -0500 | [diff] [blame] | 1189 | static int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1190 | pciserial_txx9_init_one(struct pci_dev *dev, const struct pci_device_id *ent) |
| 1191 | { |
| 1192 | struct uart_port port; |
| 1193 | int line; |
| 1194 | int rc; |
| 1195 | |
| 1196 | rc = pci_enable_device(dev); |
| 1197 | if (rc) |
| 1198 | return rc; |
| 1199 | |
| 1200 | memset(&port, 0, sizeof(port)); |
| 1201 | port.ops = &serial_txx9_pops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1202 | port.flags |= UPF_TXX9_HAVE_CTS_LINE; |
| 1203 | port.uartclk = 66670000; |
| 1204 | port.irq = dev->irq; |
| 1205 | port.iotype = UPIO_PORT; |
| 1206 | port.iobase = pci_resource_start(dev, 1); |
Ralf Baechle | f5ee56c | 2005-09-09 13:01:32 -0700 | [diff] [blame] | 1207 | port.dev = &dev->dev; |
| 1208 | line = serial_txx9_register_port(&port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1209 | if (line < 0) { |
| 1210 | printk(KERN_WARNING "Couldn't register serial port %s: %d\n", pci_name(dev), line); |
Atsushi Nemoto | 0970769 | 2007-02-22 02:17:28 +0900 | [diff] [blame] | 1211 | pci_disable_device(dev); |
| 1212 | return line; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1213 | } |
Atsushi Nemoto | 0970769 | 2007-02-22 02:17:28 +0900 | [diff] [blame] | 1214 | pci_set_drvdata(dev, &serial_txx9_ports[line]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1215 | |
| 1216 | return 0; |
| 1217 | } |
| 1218 | |
Bill Pemberton | ae8d8a1 | 2012-11-19 13:26:18 -0500 | [diff] [blame] | 1219 | static void pciserial_txx9_remove_one(struct pci_dev *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1220 | { |
Atsushi Nemoto | 0970769 | 2007-02-22 02:17:28 +0900 | [diff] [blame] | 1221 | struct uart_txx9_port *up = pci_get_drvdata(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1222 | |
| 1223 | pci_set_drvdata(dev, NULL); |
| 1224 | |
Atsushi Nemoto | 0970769 | 2007-02-22 02:17:28 +0900 | [diff] [blame] | 1225 | if (up) { |
| 1226 | serial_txx9_unregister_port(up->port.line); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1227 | pci_disable_device(dev); |
| 1228 | } |
| 1229 | } |
| 1230 | |
Atsushi Nemoto | 138c5d2 | 2007-02-10 01:45:05 -0800 | [diff] [blame] | 1231 | #ifdef CONFIG_PM |
Pavel Machek | 0370aff | 2005-04-16 15:25:35 -0700 | [diff] [blame] | 1232 | static int pciserial_txx9_suspend_one(struct pci_dev *dev, pm_message_t state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1233 | { |
Atsushi Nemoto | 0970769 | 2007-02-22 02:17:28 +0900 | [diff] [blame] | 1234 | struct uart_txx9_port *up = pci_get_drvdata(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1235 | |
Atsushi Nemoto | 0970769 | 2007-02-22 02:17:28 +0900 | [diff] [blame] | 1236 | if (up) |
| 1237 | uart_suspend_port(&serial_txx9_reg, &up->port); |
Ralf Baechle | f5ee56c | 2005-09-09 13:01:32 -0700 | [diff] [blame] | 1238 | pci_save_state(dev); |
| 1239 | pci_set_power_state(dev, pci_choose_state(dev, state)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1240 | return 0; |
| 1241 | } |
| 1242 | |
| 1243 | static int pciserial_txx9_resume_one(struct pci_dev *dev) |
| 1244 | { |
Atsushi Nemoto | 0970769 | 2007-02-22 02:17:28 +0900 | [diff] [blame] | 1245 | struct uart_txx9_port *up = pci_get_drvdata(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1246 | |
Ralf Baechle | f5ee56c | 2005-09-09 13:01:32 -0700 | [diff] [blame] | 1247 | pci_set_power_state(dev, PCI_D0); |
| 1248 | pci_restore_state(dev); |
Atsushi Nemoto | 0970769 | 2007-02-22 02:17:28 +0900 | [diff] [blame] | 1249 | if (up) |
| 1250 | uart_resume_port(&serial_txx9_reg, &up->port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1251 | return 0; |
| 1252 | } |
Atsushi Nemoto | 138c5d2 | 2007-02-10 01:45:05 -0800 | [diff] [blame] | 1253 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1254 | |
Atsushi Nemoto | 138c5d2 | 2007-02-10 01:45:05 -0800 | [diff] [blame] | 1255 | static const struct pci_device_id serial_txx9_pci_tbl[] = { |
| 1256 | { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_TC86C001_MISC) }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1257 | { 0, } |
| 1258 | }; |
| 1259 | |
| 1260 | static struct pci_driver serial_txx9_pci_driver = { |
| 1261 | .name = "serial_txx9", |
| 1262 | .probe = pciserial_txx9_init_one, |
Bill Pemberton | 2d47b71 | 2012-11-19 13:21:34 -0500 | [diff] [blame] | 1263 | .remove = pciserial_txx9_remove_one, |
Atsushi Nemoto | 138c5d2 | 2007-02-10 01:45:05 -0800 | [diff] [blame] | 1264 | #ifdef CONFIG_PM |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1265 | .suspend = pciserial_txx9_suspend_one, |
| 1266 | .resume = pciserial_txx9_resume_one, |
Atsushi Nemoto | 138c5d2 | 2007-02-10 01:45:05 -0800 | [diff] [blame] | 1267 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1268 | .id_table = serial_txx9_pci_tbl, |
| 1269 | }; |
| 1270 | |
| 1271 | MODULE_DEVICE_TABLE(pci, serial_txx9_pci_tbl); |
| 1272 | #endif /* ENABLE_SERIAL_TXX9_PCI */ |
| 1273 | |
Atsushi Nemoto | 0970769 | 2007-02-22 02:17:28 +0900 | [diff] [blame] | 1274 | static struct platform_device *serial_txx9_plat_devs; |
| 1275 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1276 | static int __init serial_txx9_init(void) |
| 1277 | { |
| 1278 | int ret; |
| 1279 | |
| 1280 | printk(KERN_INFO "%s version %s\n", serial_name, serial_version); |
| 1281 | |
| 1282 | ret = uart_register_driver(&serial_txx9_reg); |
Atsushi Nemoto | 0970769 | 2007-02-22 02:17:28 +0900 | [diff] [blame] | 1283 | if (ret) |
| 1284 | goto out; |
| 1285 | |
| 1286 | serial_txx9_plat_devs = platform_device_alloc("serial_txx9", -1); |
| 1287 | if (!serial_txx9_plat_devs) { |
| 1288 | ret = -ENOMEM; |
| 1289 | goto unreg_uart_drv; |
| 1290 | } |
| 1291 | |
| 1292 | ret = platform_device_add(serial_txx9_plat_devs); |
| 1293 | if (ret) |
| 1294 | goto put_dev; |
| 1295 | |
| 1296 | serial_txx9_register_ports(&serial_txx9_reg, |
| 1297 | &serial_txx9_plat_devs->dev); |
| 1298 | |
| 1299 | ret = platform_driver_register(&serial_txx9_plat_driver); |
| 1300 | if (ret) |
| 1301 | goto del_dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1302 | |
| 1303 | #ifdef ENABLE_SERIAL_TXX9_PCI |
Atsushi Nemoto | 0970769 | 2007-02-22 02:17:28 +0900 | [diff] [blame] | 1304 | ret = pci_register_driver(&serial_txx9_pci_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1305 | #endif |
Atsushi Nemoto | 0970769 | 2007-02-22 02:17:28 +0900 | [diff] [blame] | 1306 | if (ret == 0) |
| 1307 | goto out; |
| 1308 | |
| 1309 | del_dev: |
| 1310 | platform_device_del(serial_txx9_plat_devs); |
| 1311 | put_dev: |
| 1312 | platform_device_put(serial_txx9_plat_devs); |
| 1313 | unreg_uart_drv: |
| 1314 | uart_unregister_driver(&serial_txx9_reg); |
| 1315 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1316 | return ret; |
| 1317 | } |
| 1318 | |
| 1319 | static void __exit serial_txx9_exit(void) |
| 1320 | { |
| 1321 | int i; |
| 1322 | |
| 1323 | #ifdef ENABLE_SERIAL_TXX9_PCI |
| 1324 | pci_unregister_driver(&serial_txx9_pci_driver); |
| 1325 | #endif |
Atsushi Nemoto | 0970769 | 2007-02-22 02:17:28 +0900 | [diff] [blame] | 1326 | platform_driver_unregister(&serial_txx9_plat_driver); |
| 1327 | platform_device_unregister(serial_txx9_plat_devs); |
Atsushi Nemoto | 83485f8 | 2006-03-22 00:07:45 -0800 | [diff] [blame] | 1328 | for (i = 0; i < UART_NR; i++) { |
| 1329 | struct uart_txx9_port *up = &serial_txx9_ports[i]; |
| 1330 | if (up->port.iobase || up->port.mapbase) |
| 1331 | uart_remove_one_port(&serial_txx9_reg, &up->port); |
| 1332 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1333 | |
| 1334 | uart_unregister_driver(&serial_txx9_reg); |
| 1335 | } |
| 1336 | |
| 1337 | module_init(serial_txx9_init); |
| 1338 | module_exit(serial_txx9_exit); |
| 1339 | |
| 1340 | MODULE_LICENSE("GPL"); |
| 1341 | MODULE_DESCRIPTION("TX39/49 serial driver"); |
| 1342 | |
| 1343 | MODULE_ALIAS_CHARDEV_MAJOR(TXX9_TTY_MAJOR); |