3 * Martin Winistoerfer, martinwinistoerfer@gmx.ch.
5 * See file CREDITS for list of people who contributed to this
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
26 * Discription: Serial interface driver for SCI1 and SCI2.
27 * Since this code will be called from ROM use
28 * only non-static local variables.
37 #include <linux/compiler.h>
39 DECLARE_GLOBAL_DATA_PTR;
45 static int ready_to_send(void)
47 volatile immap_t *immr = (immap_t *)CONFIG_SYS_IMMR;
48 volatile short status;
51 #if defined(CONFIG_5xx_CONS_SCI1)
52 status = immr->im_qsmcm.qsmcm_sc1sr;
54 status = immr->im_qsmcm.qsmcm_sc2sr;
57 #if defined(CONFIG_WATCHDOG)
58 reset_5xx_watchdog (immr);
60 } while ((status & SCI_TDRE) == 0);
66 * Minimal global serial functions needed to use one of the SCI modules.
69 static int mpc5xx_serial_init(void)
71 volatile immap_t *immr = (immap_t *)CONFIG_SYS_IMMR;
75 #if defined(CONFIG_5xx_CONS_SCI1)
76 /* 10-Bit, 1 start bit, 8 data bit, no parity, 1 stop bit */
77 immr->im_qsmcm.qsmcm_scc1r1 = SCI_M_10;
78 immr->im_qsmcm.qsmcm_scc1r1 = SCI_TE | SCI_RE;
80 immr->im_qsmcm.qsmcm_scc2r1 = SCI_M_10;
81 immr->im_qsmcm.qsmcm_scc2r1 = SCI_TE | SCI_RE;
86 static void mpc5xx_serial_putc(const char c)
88 volatile immap_t *immr = (immap_t *)CONFIG_SYS_IMMR;
90 /* Test for completition */
92 #if defined(CONFIG_5xx_CONS_SCI1)
93 immr->im_qsmcm.qsmcm_sc1dr = (short)c;
95 immr->im_qsmcm.qsmcm_sc2dr = (short)c;
99 #if defined(CONFIG_5xx_CONS_SCI1)
100 immr->im_qsmcm.qsmcm_sc1dr = (short)'\r';
102 immr->im_qsmcm.qsmcm_sc2dr = (short)'\r';
108 static int mpc5xx_serial_getc(void)
110 volatile immap_t *immr = (immap_t *)CONFIG_SYS_IMMR;
111 volatile short status;
116 #if defined(CONFIG_5xx_CONS_SCI1)
117 status = immr->im_qsmcm.qsmcm_sc1sr;
119 status = immr->im_qsmcm.qsmcm_sc2sr;
122 #if defined(CONFIG_WATCHDOG)
123 reset_5xx_watchdog (immr);
125 } while ((status & SCI_RDRF) == 0);
128 #if defined(CONFIG_5xx_CONS_SCI1)
129 tmp = (unsigned char)(immr->im_qsmcm.qsmcm_sc1dr & SCI_SCXDR_MK);
131 tmp = (unsigned char)( immr->im_qsmcm.qsmcm_sc2dr & SCI_SCXDR_MK);
136 static int mpc5xx_serial_tstc(void)
138 volatile immap_t *immr = (immap_t *)CONFIG_SYS_IMMR;
141 /* New data character ? */
142 #if defined(CONFIG_5xx_CONS_SCI1)
143 status = immr->im_qsmcm.qsmcm_sc1sr;
145 status = immr->im_qsmcm.qsmcm_sc2sr;
147 return (status & SCI_RDRF);
150 static void mpc5xx_serial_setbrg(void)
152 volatile immap_t *immr = (immap_t *)CONFIG_SYS_IMMR;
156 scxbr = (gd->cpu_clk / (32 * gd->baudrate));
157 #if defined(CONFIG_5xx_CONS_SCI1)
158 immr->im_qsmcm.qsmcm_scc1r0 = (scxbr & SCI_SCXBR_MK);
160 immr->im_qsmcm.qsmcm_scc2r0 = (scxbr & SCI_SCXBR_MK);
164 static struct serial_device mpc5xx_serial_drv = {
165 .name = "mpc5xx_serial",
166 .start = mpc5xx_serial_init,
168 .setbrg = mpc5xx_serial_setbrg,
169 .putc = mpc5xx_serial_putc,
170 .puts = default_serial_puts,
171 .getc = mpc5xx_serial_getc,
172 .tstc = mpc5xx_serial_tstc,
175 void mpc5xx_serial_initialize(void)
177 serial_register(&mpc5xx_serial_drv);
180 __weak struct serial_device *default_serial_console(void)
182 return &mpc5xx_serial_drv;