meson_uart.c revision 1.2.2.2
1 1.2.2.2 pgoyette /* $NetBSD: meson_uart.c,v 1.2.2.2 2019/01/26 21:59:59 pgoyette Exp $ */ 2 1.2.2.2 pgoyette 3 1.2.2.2 pgoyette /*- 4 1.2.2.2 pgoyette * Copyright (c) 2013 The NetBSD Foundation, Inc. 5 1.2.2.2 pgoyette * All rights reserved. 6 1.2.2.2 pgoyette * 7 1.2.2.2 pgoyette * This code is derived from software contributed to The NetBSD Foundation 8 1.2.2.2 pgoyette * by Matt Thomas of 3am Software Foundry. 9 1.2.2.2 pgoyette * 10 1.2.2.2 pgoyette * Redistribution and use in source and binary forms, with or without 11 1.2.2.2 pgoyette * modification, are permitted provided that the following conditions 12 1.2.2.2 pgoyette * are met: 13 1.2.2.2 pgoyette * 1. Redistributions of source code must retain the above copyright 14 1.2.2.2 pgoyette * notice, this list of conditions and the following disclaimer. 15 1.2.2.2 pgoyette * 2. Redistributions in binary form must reproduce the above copyright 16 1.2.2.2 pgoyette * notice, this list of conditions and the following disclaimer in the 17 1.2.2.2 pgoyette * documentation and/or other materials provided with the distribution. 18 1.2.2.2 pgoyette * 19 1.2.2.2 pgoyette * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 1.2.2.2 pgoyette * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 1.2.2.2 pgoyette * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 1.2.2.2 pgoyette * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 1.2.2.2 pgoyette * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 1.2.2.2 pgoyette * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 1.2.2.2 pgoyette * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 1.2.2.2 pgoyette * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 1.2.2.2 pgoyette * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 1.2.2.2 pgoyette * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 1.2.2.2 pgoyette * POSSIBILITY OF SUCH DAMAGE. 30 1.2.2.2 pgoyette */ 31 1.2.2.2 pgoyette 32 1.2.2.2 pgoyette #include "opt_console.h" 33 1.2.2.2 pgoyette #include "locators.h" 34 1.2.2.2 pgoyette 35 1.2.2.2 pgoyette #include <sys/cdefs.h> 36 1.2.2.2 pgoyette 37 1.2.2.2 pgoyette __KERNEL_RCSID(1, "$NetBSD: meson_uart.c,v 1.2.2.2 2019/01/26 21:59:59 pgoyette Exp $"); 38 1.2.2.2 pgoyette 39 1.2.2.2 pgoyette #define cn_trap() \ 40 1.2.2.2 pgoyette do { \ 41 1.2.2.2 pgoyette console_debugger(); \ 42 1.2.2.2 pgoyette cn_trapped = 1; \ 43 1.2.2.2 pgoyette } while (/* CONSTCOND */ 0) 44 1.2.2.2 pgoyette 45 1.2.2.2 pgoyette #include <sys/param.h> 46 1.2.2.2 pgoyette #include <sys/bus.h> 47 1.2.2.2 pgoyette #include <sys/device.h> 48 1.2.2.2 pgoyette #include <sys/conf.h> 49 1.2.2.2 pgoyette #include <sys/intr.h> 50 1.2.2.2 pgoyette #include <sys/systm.h> 51 1.2.2.2 pgoyette #include <sys/time.h> 52 1.2.2.2 pgoyette #include <sys/termios.h> 53 1.2.2.2 pgoyette #include <sys/kauth.h> 54 1.2.2.2 pgoyette #include <sys/lwp.h> 55 1.2.2.2 pgoyette #include <sys/tty.h> 56 1.2.2.2 pgoyette 57 1.2.2.2 pgoyette #include <dev/cons.h> 58 1.2.2.2 pgoyette 59 1.2.2.2 pgoyette #include <dev/fdt/fdtvar.h> 60 1.2.2.2 pgoyette 61 1.2.2.2 pgoyette #include <arm/amlogic/meson_uart.h> 62 1.2.2.2 pgoyette 63 1.2.2.2 pgoyette static int meson_uart_match(device_t, cfdata_t, void *); 64 1.2.2.2 pgoyette static void meson_uart_attach(device_t, device_t, void *); 65 1.2.2.2 pgoyette 66 1.2.2.2 pgoyette static int meson_uart_intr(void *); 67 1.2.2.2 pgoyette 68 1.2.2.2 pgoyette static int meson_uart_cngetc(dev_t); 69 1.2.2.2 pgoyette static void meson_uart_cnputc(dev_t, int); 70 1.2.2.2 pgoyette static void meson_uart_cnpollc(dev_t, int); 71 1.2.2.2 pgoyette 72 1.2.2.2 pgoyette static void meson_uart_start(struct tty *); 73 1.2.2.2 pgoyette static int meson_uart_param(struct tty *, struct termios *); 74 1.2.2.2 pgoyette 75 1.2.2.2 pgoyette extern struct cfdriver mesonuart_cd; 76 1.2.2.2 pgoyette 77 1.2.2.2 pgoyette static const char * const compatible[] = { 78 1.2.2.2 pgoyette "amlogic,meson6-uart", 79 1.2.2.2 pgoyette "amlogic,meson8-uart", 80 1.2.2.2 pgoyette "amlogic,meson8b-uart", 81 1.2.2.2 pgoyette "amlogic,meson-gx-uart", 82 1.2.2.2 pgoyette NULL 83 1.2.2.2 pgoyette }; 84 1.2.2.2 pgoyette 85 1.2.2.2 pgoyette struct meson_uart_softc { 86 1.2.2.2 pgoyette device_t sc_dev; 87 1.2.2.2 pgoyette bus_space_tag_t sc_bst; 88 1.2.2.2 pgoyette bus_space_handle_t sc_bsh; 89 1.2.2.2 pgoyette void *sc_ih; 90 1.2.2.2 pgoyette 91 1.2.2.2 pgoyette struct tty *sc_tty; 92 1.2.2.2 pgoyette 93 1.2.2.2 pgoyette int sc_ospeed; 94 1.2.2.2 pgoyette tcflag_t sc_cflag; 95 1.2.2.2 pgoyette 96 1.2.2.2 pgoyette u_char sc_buf[1024]; 97 1.2.2.2 pgoyette }; 98 1.2.2.2 pgoyette 99 1.2.2.2 pgoyette static int meson_uart_console_phandle = -1; 100 1.2.2.2 pgoyette 101 1.2.2.2 pgoyette static struct meson_uart_softc meson_uart_cnsc; 102 1.2.2.2 pgoyette 103 1.2.2.2 pgoyette static struct cnm_state meson_uart_cnm_state; 104 1.2.2.2 pgoyette 105 1.2.2.2 pgoyette struct consdev meson_uart_consdev = { 106 1.2.2.2 pgoyette .cn_getc = meson_uart_cngetc, 107 1.2.2.2 pgoyette .cn_putc = meson_uart_cnputc, 108 1.2.2.2 pgoyette .cn_pollc = meson_uart_cnpollc, 109 1.2.2.2 pgoyette .cn_dev = NODEV, 110 1.2.2.2 pgoyette .cn_pri = CN_NORMAL, 111 1.2.2.2 pgoyette }; 112 1.2.2.2 pgoyette 113 1.2.2.2 pgoyette static dev_type_open(meson_uart_open); 114 1.2.2.2 pgoyette static dev_type_open(meson_uart_close); 115 1.2.2.2 pgoyette static dev_type_read(meson_uart_read); 116 1.2.2.2 pgoyette static dev_type_write(meson_uart_write); 117 1.2.2.2 pgoyette static dev_type_ioctl(meson_uart_ioctl); 118 1.2.2.2 pgoyette static dev_type_tty(meson_uart_tty); 119 1.2.2.2 pgoyette static dev_type_poll(meson_uart_poll); 120 1.2.2.2 pgoyette static dev_type_stop(meson_uart_stop); 121 1.2.2.2 pgoyette 122 1.2.2.2 pgoyette const struct cdevsw mesonuart_cdevsw = { 123 1.2.2.2 pgoyette .d_open = meson_uart_open, 124 1.2.2.2 pgoyette .d_close = meson_uart_close, 125 1.2.2.2 pgoyette .d_read = meson_uart_read, 126 1.2.2.2 pgoyette .d_write = meson_uart_write, 127 1.2.2.2 pgoyette .d_ioctl = meson_uart_ioctl, 128 1.2.2.2 pgoyette .d_stop = meson_uart_stop, 129 1.2.2.2 pgoyette .d_tty = meson_uart_tty, 130 1.2.2.2 pgoyette .d_poll = meson_uart_poll, 131 1.2.2.2 pgoyette .d_mmap = nommap, 132 1.2.2.2 pgoyette .d_kqfilter = ttykqfilter, 133 1.2.2.2 pgoyette .d_discard = nodiscard, 134 1.2.2.2 pgoyette .d_flag = D_TTY 135 1.2.2.2 pgoyette }; 136 1.2.2.2 pgoyette 137 1.2.2.2 pgoyette static int meson_uart_cmajor = -1; 138 1.2.2.2 pgoyette 139 1.2.2.2 pgoyette CFATTACH_DECL_NEW(meson_uart, sizeof(struct meson_uart_softc), 140 1.2.2.2 pgoyette meson_uart_match, meson_uart_attach, NULL, NULL); 141 1.2.2.2 pgoyette 142 1.2.2.2 pgoyette static int 143 1.2.2.2 pgoyette meson_uart_match(device_t parent, cfdata_t cf, void *aux) 144 1.2.2.2 pgoyette { 145 1.2.2.2 pgoyette struct fdt_attach_args * const faa = aux; 146 1.2.2.2 pgoyette 147 1.2.2.2 pgoyette return of_match_compatible(faa->faa_phandle, compatible); 148 1.2.2.2 pgoyette } 149 1.2.2.2 pgoyette 150 1.2.2.2 pgoyette static void 151 1.2.2.2 pgoyette meson_uart_attach(device_t parent, device_t self, void *aux) 152 1.2.2.2 pgoyette { 153 1.2.2.2 pgoyette struct meson_uart_softc * const sc = device_private(self); 154 1.2.2.2 pgoyette struct fdt_attach_args * const faa = aux; 155 1.2.2.2 pgoyette const int phandle = faa->faa_phandle; 156 1.2.2.2 pgoyette char intrstr[128]; 157 1.2.2.2 pgoyette bus_addr_t addr; 158 1.2.2.2 pgoyette bus_size_t size; 159 1.2.2.2 pgoyette struct tty *tp; 160 1.2.2.2 pgoyette int major, minor, error; 161 1.2.2.2 pgoyette uint32_t misc, control; 162 1.2.2.2 pgoyette 163 1.2.2.2 pgoyette if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) { 164 1.2.2.2 pgoyette aprint_error(": couldn't get registers\n"); 165 1.2.2.2 pgoyette return; 166 1.2.2.2 pgoyette } 167 1.2.2.2 pgoyette 168 1.2.2.2 pgoyette sc->sc_dev = self; 169 1.2.2.2 pgoyette sc->sc_bst = faa->faa_bst; 170 1.2.2.2 pgoyette 171 1.2.2.2 pgoyette error = bus_space_map(sc->sc_bst, addr, size, 0, &sc->sc_bsh); 172 1.2.2.2 pgoyette if (error != 0) { 173 1.2.2.2 pgoyette aprint_error(": couldn't map registers\n"); 174 1.2.2.2 pgoyette return; 175 1.2.2.2 pgoyette } 176 1.2.2.2 pgoyette 177 1.2.2.2 pgoyette if (!fdtbus_intr_str(phandle, 0, intrstr, sizeof(intrstr))) { 178 1.2.2.2 pgoyette aprint_error(": failed to decode interrupt\n"); 179 1.2.2.2 pgoyette return; 180 1.2.2.2 pgoyette } 181 1.2.2.2 pgoyette 182 1.2.2.2 pgoyette sc->sc_ih = fdtbus_intr_establish(phandle, 0, IPL_SERIAL, 183 1.2.2.2 pgoyette FDT_INTR_MPSAFE, meson_uart_intr, sc); 184 1.2.2.2 pgoyette if (sc->sc_ih == NULL) { 185 1.2.2.2 pgoyette aprint_error(": failed to establish interrupt on %s\n", 186 1.2.2.2 pgoyette intrstr); 187 1.2.2.2 pgoyette return; 188 1.2.2.2 pgoyette } 189 1.2.2.2 pgoyette 190 1.2.2.2 pgoyette if (meson_uart_cmajor == -1) { 191 1.2.2.2 pgoyette /* allocate a major number */ 192 1.2.2.2 pgoyette int bmajor = -1, cmajor = -1; 193 1.2.2.2 pgoyette error = devsw_attach("mesonuart", NULL, &bmajor, 194 1.2.2.2 pgoyette &mesonuart_cdevsw, &cmajor); 195 1.2.2.2 pgoyette if (error) { 196 1.2.2.2 pgoyette aprint_error(": couldn't allocate major number\n"); 197 1.2.2.2 pgoyette return; 198 1.2.2.2 pgoyette } 199 1.2.2.2 pgoyette meson_uart_cmajor = cmajor; 200 1.2.2.2 pgoyette } 201 1.2.2.2 pgoyette 202 1.2.2.2 pgoyette major = cdevsw_lookup_major(&mesonuart_cdevsw); 203 1.2.2.2 pgoyette minor = device_unit(self); 204 1.2.2.2 pgoyette 205 1.2.2.2 pgoyette tp = sc->sc_tty = tty_alloc(); 206 1.2.2.2 pgoyette tp->t_oproc = meson_uart_start; 207 1.2.2.2 pgoyette tp->t_param = meson_uart_param; 208 1.2.2.2 pgoyette tp->t_dev = makedev(major, minor); 209 1.2.2.2 pgoyette tp->t_sc = sc; 210 1.2.2.2 pgoyette tty_attach(tp); 211 1.2.2.2 pgoyette 212 1.2.2.2 pgoyette aprint_naive("\n"); 213 1.2.2.2 pgoyette if (meson_uart_console_phandle == phandle) { 214 1.2.2.2 pgoyette cn_tab->cn_dev = tp->t_dev; 215 1.2.2.2 pgoyette aprint_normal(": console"); 216 1.2.2.2 pgoyette } 217 1.2.2.2 pgoyette aprint_normal("\n"); 218 1.2.2.2 pgoyette 219 1.2.2.2 pgoyette aprint_normal_dev(self, "interrupting on %s\n", intrstr); 220 1.2.2.2 pgoyette 221 1.2.2.2 pgoyette misc = bus_space_read_4(sc->sc_bst, sc->sc_bsh, UART_MISC_REG); 222 1.2.2.2 pgoyette misc &= ~UART_MISC_TX_IRQ_CNT; 223 1.2.2.2 pgoyette misc |= __SHIFTIN(0, UART_MISC_TX_IRQ_CNT); 224 1.2.2.2 pgoyette misc &= ~UART_MISC_RX_IRQ_CNT; 225 1.2.2.2 pgoyette misc |= __SHIFTIN(1, UART_MISC_RX_IRQ_CNT); 226 1.2.2.2 pgoyette bus_space_write_4(sc->sc_bst, sc->sc_bsh, UART_MISC_REG, misc); 227 1.2.2.2 pgoyette 228 1.2.2.2 pgoyette control = bus_space_read_4(sc->sc_bst, sc->sc_bsh, UART_CONTROL_REG); 229 1.2.2.2 pgoyette control &= ~(UART_CONTROL_TX_INT_EN|UART_CONTROL_RX_INT_EN); 230 1.2.2.2 pgoyette bus_space_write_4(sc->sc_bst, sc->sc_bsh, UART_CONTROL_REG, control); 231 1.2.2.2 pgoyette } 232 1.2.2.2 pgoyette 233 1.2.2.2 pgoyette static int 234 1.2.2.2 pgoyette meson_uart_cngetc(dev_t dev) 235 1.2.2.2 pgoyette { 236 1.2.2.2 pgoyette bus_space_tag_t bst = meson_uart_cnsc.sc_bst; 237 1.2.2.2 pgoyette bus_space_handle_t bsh = meson_uart_cnsc.sc_bsh; 238 1.2.2.2 pgoyette uint32_t status; 239 1.2.2.2 pgoyette int s, c; 240 1.2.2.2 pgoyette 241 1.2.2.2 pgoyette s = splserial(); 242 1.2.2.2 pgoyette 243 1.2.2.2 pgoyette status = bus_space_read_4(bst, bsh, UART_STATUS_REG); 244 1.2.2.2 pgoyette if (status & UART_STATUS_RX_EMPTY) { 245 1.2.2.2 pgoyette splx(s); 246 1.2.2.2 pgoyette return -1; 247 1.2.2.2 pgoyette } 248 1.2.2.2 pgoyette 249 1.2.2.2 pgoyette c = bus_space_read_4(bst, bsh, UART_RFIFO_REG); 250 1.2.2.2 pgoyette #if defined(DDB) 251 1.2.2.2 pgoyette extern int db_active; 252 1.2.2.2 pgoyette if (!db_active) 253 1.2.2.2 pgoyette #endif 254 1.2.2.2 pgoyette { 255 1.2.2.2 pgoyette int cn_trapped __unused = 0; 256 1.2.2.2 pgoyette cn_check_magic(dev, c, meson_uart_cnm_state); 257 1.2.2.2 pgoyette } 258 1.2.2.2 pgoyette 259 1.2.2.2 pgoyette splx(s); 260 1.2.2.2 pgoyette 261 1.2.2.2 pgoyette return c & 0xff; 262 1.2.2.2 pgoyette } 263 1.2.2.2 pgoyette 264 1.2.2.2 pgoyette static void 265 1.2.2.2 pgoyette meson_uart_cnputc(dev_t dev, int c) 266 1.2.2.2 pgoyette { 267 1.2.2.2 pgoyette bus_space_tag_t bst = meson_uart_cnsc.sc_bst; 268 1.2.2.2 pgoyette bus_space_handle_t bsh = meson_uart_cnsc.sc_bsh; 269 1.2.2.2 pgoyette int s; 270 1.2.2.2 pgoyette 271 1.2.2.2 pgoyette s = splserial(); 272 1.2.2.2 pgoyette 273 1.2.2.2 pgoyette while ((bus_space_read_4(bst, bsh, UART_STATUS_REG) & UART_STATUS_TX_FULL) != 0) 274 1.2.2.2 pgoyette ; 275 1.2.2.2 pgoyette 276 1.2.2.2 pgoyette bus_space_write_4(bst, bsh, UART_WFIFO_REG, c); 277 1.2.2.2 pgoyette 278 1.2.2.2 pgoyette splx(s); 279 1.2.2.2 pgoyette } 280 1.2.2.2 pgoyette 281 1.2.2.2 pgoyette 282 1.2.2.2 pgoyette static void 283 1.2.2.2 pgoyette meson_uart_cnpollc(dev_t dev, int on) 284 1.2.2.2 pgoyette { 285 1.2.2.2 pgoyette } 286 1.2.2.2 pgoyette 287 1.2.2.2 pgoyette static int 288 1.2.2.2 pgoyette meson_uart_open(dev_t dev, int flag, int mode, lwp_t *l) 289 1.2.2.2 pgoyette { 290 1.2.2.2 pgoyette struct meson_uart_softc *sc = 291 1.2.2.2 pgoyette device_lookup_private(&mesonuart_cd, minor(dev)); 292 1.2.2.2 pgoyette struct tty *tp = sc->sc_tty; 293 1.2.2.2 pgoyette uint32_t control; 294 1.2.2.2 pgoyette 295 1.2.2.2 pgoyette if (kauth_authorize_device_tty(l->l_cred, 296 1.2.2.2 pgoyette KAUTH_DEVICE_TTY_OPEN, tp) != 0) { 297 1.2.2.2 pgoyette return EBUSY; 298 1.2.2.2 pgoyette } 299 1.2.2.2 pgoyette 300 1.2.2.2 pgoyette if ((tp->t_state & TS_ISOPEN) == 0 && tp->t_wopen == 0) { 301 1.2.2.2 pgoyette tp->t_dev = dev; 302 1.2.2.2 pgoyette ttychars(tp); 303 1.2.2.2 pgoyette tp->t_iflag = TTYDEF_IFLAG; 304 1.2.2.2 pgoyette tp->t_oflag = TTYDEF_OFLAG; 305 1.2.2.2 pgoyette tp->t_cflag = TTYDEF_CFLAG; 306 1.2.2.2 pgoyette tp->t_lflag = TTYDEF_LFLAG; 307 1.2.2.2 pgoyette tp->t_ispeed = tp->t_ospeed = TTYDEF_SPEED; 308 1.2.2.2 pgoyette ttsetwater(tp); 309 1.2.2.2 pgoyette 310 1.2.2.2 pgoyette control = bus_space_read_4(sc->sc_bst, sc->sc_bsh, UART_CONTROL_REG); 311 1.2.2.2 pgoyette control |= UART_CONTROL_RX_INT_EN; 312 1.2.2.2 pgoyette bus_space_write_4(sc->sc_bst, sc->sc_bsh, UART_CONTROL_REG, control); 313 1.2.2.2 pgoyette } 314 1.2.2.2 pgoyette tp->t_state |= TS_CARR_ON; 315 1.2.2.2 pgoyette 316 1.2.2.2 pgoyette return tp->t_linesw->l_open(dev, tp); 317 1.2.2.2 pgoyette } 318 1.2.2.2 pgoyette 319 1.2.2.2 pgoyette static int 320 1.2.2.2 pgoyette meson_uart_close(dev_t dev, int flag, int mode, lwp_t *l) 321 1.2.2.2 pgoyette { 322 1.2.2.2 pgoyette struct meson_uart_softc *sc = 323 1.2.2.2 pgoyette device_lookup_private(&mesonuart_cd, minor(dev)); 324 1.2.2.2 pgoyette struct tty *tp = sc->sc_tty; 325 1.2.2.2 pgoyette uint32_t control; 326 1.2.2.2 pgoyette 327 1.2.2.2 pgoyette tp->t_linesw->l_close(tp, flag); 328 1.2.2.2 pgoyette ttyclose(tp); 329 1.2.2.2 pgoyette 330 1.2.2.2 pgoyette if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 331 1.2.2.2 pgoyette control = bus_space_read_4(sc->sc_bst, sc->sc_bsh, UART_CONTROL_REG); 332 1.2.2.2 pgoyette control &= ~UART_CONTROL_RX_INT_EN; 333 1.2.2.2 pgoyette bus_space_write_4(sc->sc_bst, sc->sc_bsh, UART_CONTROL_REG, control); 334 1.2.2.2 pgoyette } 335 1.2.2.2 pgoyette 336 1.2.2.2 pgoyette return 0; 337 1.2.2.2 pgoyette } 338 1.2.2.2 pgoyette 339 1.2.2.2 pgoyette static int 340 1.2.2.2 pgoyette meson_uart_read(dev_t dev, struct uio *uio, int flag) 341 1.2.2.2 pgoyette { 342 1.2.2.2 pgoyette struct meson_uart_softc *sc = 343 1.2.2.2 pgoyette device_lookup_private(&mesonuart_cd, minor(dev)); 344 1.2.2.2 pgoyette struct tty *tp = sc->sc_tty; 345 1.2.2.2 pgoyette 346 1.2.2.2 pgoyette return tp->t_linesw->l_read(tp, uio, flag); 347 1.2.2.2 pgoyette } 348 1.2.2.2 pgoyette 349 1.2.2.2 pgoyette static int 350 1.2.2.2 pgoyette meson_uart_write(dev_t dev, struct uio *uio, int flag) 351 1.2.2.2 pgoyette { 352 1.2.2.2 pgoyette struct meson_uart_softc *sc = 353 1.2.2.2 pgoyette device_lookup_private(&mesonuart_cd, minor(dev)); 354 1.2.2.2 pgoyette struct tty *tp = sc->sc_tty; 355 1.2.2.2 pgoyette 356 1.2.2.2 pgoyette return tp->t_linesw->l_write(tp, uio, flag); 357 1.2.2.2 pgoyette } 358 1.2.2.2 pgoyette 359 1.2.2.2 pgoyette static int 360 1.2.2.2 pgoyette meson_uart_poll(dev_t dev, int events, lwp_t *l) 361 1.2.2.2 pgoyette { 362 1.2.2.2 pgoyette struct meson_uart_softc *sc = 363 1.2.2.2 pgoyette device_lookup_private(&mesonuart_cd, minor(dev)); 364 1.2.2.2 pgoyette struct tty *tp = sc->sc_tty; 365 1.2.2.2 pgoyette 366 1.2.2.2 pgoyette return tp->t_linesw->l_poll(tp, events, l); 367 1.2.2.2 pgoyette } 368 1.2.2.2 pgoyette 369 1.2.2.2 pgoyette static int 370 1.2.2.2 pgoyette meson_uart_ioctl(dev_t dev, u_long cmd, void *data, int flag, lwp_t *l) 371 1.2.2.2 pgoyette { 372 1.2.2.2 pgoyette struct meson_uart_softc *sc = 373 1.2.2.2 pgoyette device_lookup_private(&mesonuart_cd, minor(dev)); 374 1.2.2.2 pgoyette struct tty *tp = sc->sc_tty; 375 1.2.2.2 pgoyette int error; 376 1.2.2.2 pgoyette 377 1.2.2.2 pgoyette error = tp->t_linesw->l_ioctl(tp, cmd, data, flag, l); 378 1.2.2.2 pgoyette if (error != EPASSTHROUGH) 379 1.2.2.2 pgoyette return error; 380 1.2.2.2 pgoyette 381 1.2.2.2 pgoyette return ttioctl(tp, cmd, data, flag, l); 382 1.2.2.2 pgoyette } 383 1.2.2.2 pgoyette 384 1.2.2.2 pgoyette static struct tty * 385 1.2.2.2 pgoyette meson_uart_tty(dev_t dev) 386 1.2.2.2 pgoyette { 387 1.2.2.2 pgoyette struct meson_uart_softc *sc = 388 1.2.2.2 pgoyette device_lookup_private(&mesonuart_cd, minor(dev)); 389 1.2.2.2 pgoyette 390 1.2.2.2 pgoyette return sc->sc_tty; 391 1.2.2.2 pgoyette } 392 1.2.2.2 pgoyette 393 1.2.2.2 pgoyette static void 394 1.2.2.2 pgoyette meson_uart_stop(struct tty *tp, int flag) 395 1.2.2.2 pgoyette { 396 1.2.2.2 pgoyette } 397 1.2.2.2 pgoyette 398 1.2.2.2 pgoyette static void 399 1.2.2.2 pgoyette meson_uart_start(struct tty *tp) 400 1.2.2.2 pgoyette { 401 1.2.2.2 pgoyette struct meson_uart_softc *sc = tp->t_sc; 402 1.2.2.2 pgoyette u_char *p = sc->sc_buf; 403 1.2.2.2 pgoyette int s, brem; 404 1.2.2.2 pgoyette 405 1.2.2.2 pgoyette s = spltty(); 406 1.2.2.2 pgoyette 407 1.2.2.2 pgoyette if (tp->t_state & (TS_TTSTOP | TS_BUSY | TS_TIMEOUT)) { 408 1.2.2.2 pgoyette splx(s); 409 1.2.2.2 pgoyette return; 410 1.2.2.2 pgoyette } 411 1.2.2.2 pgoyette tp->t_state |= TS_BUSY; 412 1.2.2.2 pgoyette 413 1.2.2.2 pgoyette splx(s); 414 1.2.2.2 pgoyette 415 1.2.2.2 pgoyette for (brem = q_to_b(&tp->t_outq, sc->sc_buf, sizeof(sc->sc_buf)); 416 1.2.2.2 pgoyette brem > 0; 417 1.2.2.2 pgoyette brem--, p++) { 418 1.2.2.2 pgoyette while ((bus_space_read_4(sc->sc_bst, sc->sc_bsh, 419 1.2.2.2 pgoyette UART_STATUS_REG) & UART_STATUS_TX_FULL) != 0) 420 1.2.2.2 pgoyette ; 421 1.2.2.2 pgoyette 422 1.2.2.2 pgoyette bus_space_write_4(sc->sc_bst, sc->sc_bsh, 423 1.2.2.2 pgoyette UART_WFIFO_REG, *p); 424 1.2.2.2 pgoyette } 425 1.2.2.2 pgoyette 426 1.2.2.2 pgoyette s = spltty(); 427 1.2.2.2 pgoyette tp->t_state &= ~TS_BUSY; 428 1.2.2.2 pgoyette if (ttypull(tp)) { 429 1.2.2.2 pgoyette tp->t_state |= TS_TIMEOUT; 430 1.2.2.2 pgoyette callout_schedule(&tp->t_rstrt_ch, 1); 431 1.2.2.2 pgoyette } 432 1.2.2.2 pgoyette splx(s); 433 1.2.2.2 pgoyette } 434 1.2.2.2 pgoyette 435 1.2.2.2 pgoyette static int 436 1.2.2.2 pgoyette meson_uart_param(struct tty *tp, struct termios *t) 437 1.2.2.2 pgoyette { 438 1.2.2.2 pgoyette 439 1.2.2.2 pgoyette tp->t_ispeed = t->c_ispeed; 440 1.2.2.2 pgoyette tp->t_ospeed = t->c_ospeed; 441 1.2.2.2 pgoyette tp->t_cflag = t->c_cflag; 442 1.2.2.2 pgoyette 443 1.2.2.2 pgoyette return 0; 444 1.2.2.2 pgoyette } 445 1.2.2.2 pgoyette 446 1.2.2.2 pgoyette static int 447 1.2.2.2 pgoyette meson_uart_intr(void *priv) 448 1.2.2.2 pgoyette { 449 1.2.2.2 pgoyette struct meson_uart_softc *sc = priv; 450 1.2.2.2 pgoyette struct tty *tp = sc->sc_tty; 451 1.2.2.2 pgoyette uint32_t status, c; 452 1.2.2.2 pgoyette 453 1.2.2.2 pgoyette for (;;) { 454 1.2.2.2 pgoyette int cn_trapped = 0; 455 1.2.2.2 pgoyette status = bus_space_read_4(sc->sc_bst, sc->sc_bsh, 456 1.2.2.2 pgoyette UART_STATUS_REG); 457 1.2.2.2 pgoyette if (status & UART_STATUS_RX_EMPTY) { 458 1.2.2.2 pgoyette break; 459 1.2.2.2 pgoyette } 460 1.2.2.2 pgoyette if (status & UART_STATUS_BREAK) { 461 1.2.2.2 pgoyette cn_check_magic(tp->t_dev, CNC_BREAK, 462 1.2.2.2 pgoyette meson_uart_cnm_state); 463 1.2.2.2 pgoyette if (cn_trapped) 464 1.2.2.2 pgoyette continue; 465 1.2.2.2 pgoyette } 466 1.2.2.2 pgoyette 467 1.2.2.2 pgoyette c = bus_space_read_4(sc->sc_bst, sc->sc_bsh, UART_RFIFO_REG); 468 1.2.2.2 pgoyette cn_check_magic(tp->t_dev, c & 0xff, meson_uart_cnm_state); 469 1.2.2.2 pgoyette if (cn_trapped) 470 1.2.2.2 pgoyette continue; 471 1.2.2.2 pgoyette tp->t_linesw->l_rint(c & 0xff, tp); 472 1.2.2.2 pgoyette } 473 1.2.2.2 pgoyette 474 1.2.2.2 pgoyette return 0; 475 1.2.2.2 pgoyette } 476 1.2.2.2 pgoyette 477 1.2.2.2 pgoyette static int 478 1.2.2.2 pgoyette meson_uart_console_match(int phandle) 479 1.2.2.2 pgoyette { 480 1.2.2.2 pgoyette return of_match_compatible(phandle, compatible); 481 1.2.2.2 pgoyette } 482 1.2.2.2 pgoyette 483 1.2.2.2 pgoyette static void 484 1.2.2.2 pgoyette meson_uart_console_consinit(struct fdt_attach_args *faa, u_int uart_freq) 485 1.2.2.2 pgoyette { 486 1.2.2.2 pgoyette struct meson_uart_softc *sc = &meson_uart_cnsc; 487 1.2.2.2 pgoyette const int phandle = faa->faa_phandle; 488 1.2.2.2 pgoyette bus_addr_t addr; 489 1.2.2.2 pgoyette bus_size_t size; 490 1.2.2.2 pgoyette int error; 491 1.2.2.2 pgoyette 492 1.2.2.2 pgoyette fdtbus_get_reg(phandle, 0, &addr, &size); 493 1.2.2.2 pgoyette 494 1.2.2.2 pgoyette sc->sc_bst = faa->faa_bst; 495 1.2.2.2 pgoyette sc->sc_ospeed = fdtbus_get_stdout_speed(); 496 1.2.2.2 pgoyette if (sc->sc_ospeed < 0) 497 1.2.2.2 pgoyette sc->sc_ospeed = 115200; 498 1.2.2.2 pgoyette sc->sc_cflag = fdtbus_get_stdout_flags(); 499 1.2.2.2 pgoyette 500 1.2.2.2 pgoyette error = bus_space_map(sc->sc_bst, addr, size, 0, &sc->sc_bsh); 501 1.2.2.2 pgoyette if (error != 0) 502 1.2.2.2 pgoyette panic("failed to map console, error = %d", error); 503 1.2.2.2 pgoyette 504 1.2.2.2 pgoyette cn_tab = &meson_uart_consdev; 505 1.2.2.2 pgoyette cn_init_magic(&meson_uart_cnm_state); 506 1.2.2.2 pgoyette cn_set_magic("\047\001"); 507 1.2.2.2 pgoyette 508 1.2.2.2 pgoyette meson_uart_console_phandle = phandle; 509 1.2.2.2 pgoyette } 510 1.2.2.2 pgoyette 511 1.2.2.2 pgoyette static const struct fdt_console meson_uart_console = { 512 1.2.2.2 pgoyette .match = meson_uart_console_match, 513 1.2.2.2 pgoyette .consinit = meson_uart_console_consinit, 514 1.2.2.2 pgoyette }; 515 1.2.2.2 pgoyette 516 1.2.2.2 pgoyette FDT_CONSOLE(meson_uart, &meson_uart_console); 517
Indexes created Tue Sep 30 20:09:53 GMT 2025