2 * (C) Copyright 2000 - 2003
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
23 * Hacked for MPC8260 by Murray.Jensen@cmst.csiro.au, 19-Oct-00, with
24 * changes based on the file arch/powerpc/mbxboot/m8260_tty.c from the
25 * Linux/PPC sources (m8260_tty.c had no copyright info in it).
27 * Martin Krause, 8 Jun 2006
28 * Added SERIAL_MULTI support
32 * Minimal serial functions needed to use one of the PSC ports
33 * as serial console interface.
37 #include <linux/compiler.h>
41 DECLARE_GLOBAL_DATA_PTR;
43 #if defined(CONFIG_PSC_CONSOLE)
45 #if CONFIG_PSC_CONSOLE == 1
46 #define PSC_BASE MPC5XXX_PSC1
47 #elif CONFIG_PSC_CONSOLE == 2
48 #define PSC_BASE MPC5XXX_PSC2
49 #elif CONFIG_PSC_CONSOLE == 3
50 #define PSC_BASE MPC5XXX_PSC3
51 #elif CONFIG_PSC_CONSOLE == 4
52 #define PSC_BASE MPC5XXX_PSC4
53 #elif CONFIG_PSC_CONSOLE == 5
54 #define PSC_BASE MPC5XXX_PSC5
55 #elif CONFIG_PSC_CONSOLE == 6
56 #define PSC_BASE MPC5XXX_PSC6
58 #error CONFIG_PSC_CONSOLE must be in 1 ... 6
61 #if defined(CONFIG_PSC_CONSOLE2)
63 #if CONFIG_PSC_CONSOLE2 == 1
64 #define PSC_BASE2 MPC5XXX_PSC1
65 #elif CONFIG_PSC_CONSOLE2 == 2
66 #define PSC_BASE2 MPC5XXX_PSC2
67 #elif CONFIG_PSC_CONSOLE2 == 3
68 #define PSC_BASE2 MPC5XXX_PSC3
69 #elif CONFIG_PSC_CONSOLE2 == 4
70 #define PSC_BASE2 MPC5XXX_PSC4
71 #elif CONFIG_PSC_CONSOLE2 == 5
72 #define PSC_BASE2 MPC5XXX_PSC5
73 #elif CONFIG_PSC_CONSOLE2 == 6
74 #define PSC_BASE2 MPC5XXX_PSC6
76 #error CONFIG_PSC_CONSOLE2 must be in 1 ... 6
81 int serial_init_dev (unsigned long dev_base)
83 volatile struct mpc5xxx_psc *psc = (struct mpc5xxx_psc *)dev_base;
84 unsigned long baseclk;
88 psc->command = PSC_SEL_MODE_REG_1;
90 /* select clock sources */
91 psc->psc_clock_select = 0;
92 baseclk = (gd->ipb_clk + 16) / 32;
94 /* switch to UART mode */
97 /* configure parity, bit length and so on */
98 psc->mode = PSC_MODE_8_BITS | PSC_MODE_PARNONE;
99 psc->mode = PSC_MODE_ONE_STOP;
101 /* set up UART divisor */
102 div = (baseclk + (gd->baudrate/2)) / gd->baudrate;
103 psc->ctur = (div >> 8) & 0xff;
104 psc->ctlr = div & 0xff;
106 /* disable all interrupts */
109 /* reset and enable Rx/Tx */
110 psc->command = PSC_RST_RX;
111 psc->command = PSC_RST_TX;
112 psc->command = PSC_RX_ENABLE | PSC_TX_ENABLE;
117 void serial_putc_dev (unsigned long dev_base, const char c)
119 volatile struct mpc5xxx_psc *psc = (struct mpc5xxx_psc *)dev_base;
122 serial_putc_dev (dev_base, '\r');
124 /* Wait for last character to go. */
125 while (!(psc->psc_status & PSC_SR_TXEMP))
128 psc->psc_buffer_8 = c;
131 void serial_putc_raw_dev(unsigned long dev_base, const char c)
133 volatile struct mpc5xxx_psc *psc = (struct mpc5xxx_psc *)dev_base;
134 /* Wait for last character to go. */
135 while (!(psc->psc_status & PSC_SR_TXEMP))
138 psc->psc_buffer_8 = c;
142 void serial_puts_dev (unsigned long dev_base, const char *s)
145 serial_putc_dev (dev_base, *s++);
149 int serial_getc_dev (unsigned long dev_base)
151 volatile struct mpc5xxx_psc *psc = (struct mpc5xxx_psc *)dev_base;
153 /* Wait for a character to arrive. */
154 while (!(psc->psc_status & PSC_SR_RXRDY))
157 return psc->psc_buffer_8;
160 int serial_tstc_dev (unsigned long dev_base)
162 volatile struct mpc5xxx_psc *psc = (struct mpc5xxx_psc *)dev_base;
164 return (psc->psc_status & PSC_SR_RXRDY);
167 void serial_setbrg_dev (unsigned long dev_base)
169 volatile struct mpc5xxx_psc *psc = (struct mpc5xxx_psc *)dev_base;
170 unsigned long baseclk, div;
172 baseclk = (gd->ipb_clk + 16) / 32;
174 /* set up UART divisor */
175 div = (baseclk + (gd->baudrate/2)) / gd->baudrate;
176 psc->ctur = (div >> 8) & 0xFF;
177 psc->ctlr = div & 0xff;
180 void serial_setrts_dev (unsigned long dev_base, int s)
182 volatile struct mpc5xxx_psc *psc = (struct mpc5xxx_psc *)dev_base;
185 /* Assert RTS (become LOW) */
189 /* Negate RTS (become HIGH) */
194 int serial_getcts_dev (unsigned long dev_base)
196 volatile struct mpc5xxx_psc *psc = (struct mpc5xxx_psc *)dev_base;
198 return (psc->ip & 0x1) ? 0 : 1;
201 int serial0_init(void)
203 return (serial_init_dev(PSC_BASE));
206 void serial0_setbrg (void)
208 serial_setbrg_dev(PSC_BASE);
211 void serial0_putc(const char c)
213 serial_putc_dev(PSC_BASE,c);
216 void serial0_puts(const char *s)
218 serial_puts_dev(PSC_BASE, s);
221 int serial0_getc(void)
223 return(serial_getc_dev(PSC_BASE));
226 int serial0_tstc(void)
228 return (serial_tstc_dev(PSC_BASE));
231 struct serial_device serial0_device =
234 .start = serial0_init,
236 .setbrg = serial0_setbrg,
237 .getc = serial0_getc,
238 .tstc = serial0_tstc,
239 .putc = serial0_putc,
240 .puts = serial0_puts,
243 __weak struct serial_device *default_serial_console(void)
245 return &serial0_device;
248 #ifdef CONFIG_PSC_CONSOLE2
249 int serial1_init(void)
251 return serial_init_dev(PSC_BASE2);
254 void serial1_setbrg(void)
256 serial_setbrg_dev(PSC_BASE2);
259 void serial1_putc(const char c)
261 serial_putc_dev(PSC_BASE2, c);
264 void serial1_puts(const char *s)
266 serial_puts_dev(PSC_BASE2, s);
269 int serial1_getc(void)
271 return serial_getc_dev(PSC_BASE2);
274 int serial1_tstc(void)
276 return serial_tstc_dev(PSC_BASE2);
279 struct serial_device serial1_device =
282 .start = serial1_init,
284 .setbrg = serial1_setbrg,
285 .getc = serial1_getc,
286 .tstc = serial1_tstc,
287 .putc = serial1_putc,
288 .puts = serial1_puts,
290 #endif /* CONFIG_PSC_CONSOLE2 */
292 #endif /* CONFIG_PSC_CONSOLE */