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/ppc/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 CONFIG_SERIAL_MULTI support
32 * Minimal serial functions needed to use one of the PSC ports
33 * as serial console interface.
39 #if defined (CONFIG_SERIAL_MULTI)
43 DECLARE_GLOBAL_DATA_PTR;
45 #if defined(CONFIG_PSC_CONSOLE)
47 #if CONFIG_PSC_CONSOLE == 1
48 #define PSC_BASE MPC5XXX_PSC1
49 #elif CONFIG_PSC_CONSOLE == 2
50 #define PSC_BASE MPC5XXX_PSC2
51 #elif CONFIG_PSC_CONSOLE == 3
52 #define PSC_BASE MPC5XXX_PSC3
53 #elif defined(CONFIG_MGT5100)
54 #error CONFIG_PSC_CONSOLE must be in 1, 2 or 3
55 #elif CONFIG_PSC_CONSOLE == 4
56 #define PSC_BASE MPC5XXX_PSC4
57 #elif CONFIG_PSC_CONSOLE == 5
58 #define PSC_BASE MPC5XXX_PSC5
59 #elif CONFIG_PSC_CONSOLE == 6
60 #define PSC_BASE MPC5XXX_PSC6
62 #error CONFIG_PSC_CONSOLE must be in 1 ... 6
65 #if defined(CONFIG_SERIAL_MULTI) && !defined(CONFIG_PSC_CONSOLE2)
66 #error you must define CONFIG_PSC_CONSOLE2 if CONFIG_SERIAL_MULTI is set
69 #if defined(CONFIG_SERIAL_MULTI)
70 #if CONFIG_PSC_CONSOLE2 == 1
71 #define PSC_BASE2 MPC5XXX_PSC1
72 #elif CONFIG_PSC_CONSOLE2 == 2
73 #define PSC_BASE2 MPC5XXX_PSC2
74 #elif CONFIG_PSC_CONSOLE2 == 3
75 #define PSC_BASE2 MPC5XXX_PSC3
76 #elif defined(CONFIG_MGT5100)
77 #error CONFIG_PSC_CONSOLE2 must be in 1, 2 or 3
78 #elif CONFIG_PSC_CONSOLE2 == 4
79 #define PSC_BASE2 MPC5XXX_PSC4
80 #elif CONFIG_PSC_CONSOLE2 == 5
81 #define PSC_BASE2 MPC5XXX_PSC5
82 #elif CONFIG_PSC_CONSOLE2 == 6
83 #define PSC_BASE2 MPC5XXX_PSC6
85 #error CONFIG_PSC_CONSOLE2 must be in 1 ... 6
87 #endif /* CONFIG_SERIAL_MULTI */
89 #if defined(CONFIG_SERIAL_MULTI)
90 int serial_init_dev (unsigned long dev_base)
92 int serial_init (void)
95 #if defined(CONFIG_SERIAL_MULTI)
96 volatile struct mpc5xxx_psc *psc = (struct mpc5xxx_psc *)dev_base;
98 volatile struct mpc5xxx_psc *psc = (struct mpc5xxx_psc *)PSC_BASE;
100 unsigned long baseclk;
104 psc->command = PSC_SEL_MODE_REG_1;
106 /* select clock sources */
107 #if defined(CONFIG_MGT5100)
108 psc->psc_clock_select = 0xdd00;
109 baseclk = (CFG_MPC5XXX_CLKIN + 16) / 32;
110 #elif defined(CONFIG_MPC5200)
111 psc->psc_clock_select = 0;
112 baseclk = (gd->ipb_clk + 16) / 32;
115 /* switch to UART mode */
118 /* configure parity, bit length and so on */
119 #if defined(CONFIG_MGT5100)
120 psc->mode = PSC_MODE_ERR | PSC_MODE_8_BITS | PSC_MODE_PARNONE;
121 #elif defined(CONFIG_MPC5200)
122 psc->mode = PSC_MODE_8_BITS | PSC_MODE_PARNONE;
124 psc->mode = PSC_MODE_ONE_STOP;
126 /* set up UART divisor */
127 div = (baseclk + (gd->baudrate/2)) / gd->baudrate;
128 psc->ctur = (div >> 8) & 0xff;
129 psc->ctlr = div & 0xff;
131 /* disable all interrupts */
134 /* reset and enable Rx/Tx */
135 psc->command = PSC_RST_RX;
136 psc->command = PSC_RST_TX;
137 psc->command = PSC_RX_ENABLE | PSC_TX_ENABLE;
142 #if defined(CONFIG_SERIAL_MULTI)
143 void serial_putc_dev (unsigned long dev_base, const char c)
145 void serial_putc(const char c)
148 #if defined(CONFIG_SERIAL_MULTI)
149 volatile struct mpc5xxx_psc *psc = (struct mpc5xxx_psc *)dev_base;
151 volatile struct mpc5xxx_psc *psc = (struct mpc5xxx_psc *)PSC_BASE;
155 #if defined(CONFIG_SERIAL_MULTI)
156 serial_putc_dev (dev_base, '\r');
161 /* Wait for last character to go. */
162 while (!(psc->psc_status & PSC_SR_TXEMP))
165 psc->psc_buffer_8 = c;
168 #if defined(CONFIG_SERIAL_MULTI)
169 void serial_puts_dev (unsigned long dev_base, const char *s)
171 void serial_puts (const char *s)
175 #if defined(CONFIG_SERIAL_MULTI)
176 serial_putc_dev (dev_base, *s++);
183 #if defined(CONFIG_SERIAL_MULTI)
184 int serial_getc_dev (unsigned long dev_base)
186 int serial_getc(void)
189 #if defined(CONFIG_SERIAL_MULTI)
190 volatile struct mpc5xxx_psc *psc = (struct mpc5xxx_psc *)dev_base;
192 volatile struct mpc5xxx_psc *psc = (struct mpc5xxx_psc *)PSC_BASE;
195 /* Wait for a character to arrive. */
196 while (!(psc->psc_status & PSC_SR_RXRDY))
199 return psc->psc_buffer_8;
202 #if defined(CONFIG_SERIAL_MULTI)
203 int serial_tstc_dev (unsigned long dev_base)
205 int serial_tstc(void)
208 #if defined(CONFIG_SERIAL_MULTI)
209 volatile struct mpc5xxx_psc *psc = (struct mpc5xxx_psc *)dev_base;
211 volatile struct mpc5xxx_psc *psc = (struct mpc5xxx_psc *)PSC_BASE;
214 return (psc->psc_status & PSC_SR_RXRDY);
217 #if defined(CONFIG_SERIAL_MULTI)
218 void serial_setbrg_dev (unsigned long dev_base)
220 void serial_setbrg(void)
223 #if defined(CONFIG_SERIAL_MULTI)
224 volatile struct mpc5xxx_psc *psc = (struct mpc5xxx_psc *)dev_base;
226 volatile struct mpc5xxx_psc *psc = (struct mpc5xxx_psc *)PSC_BASE;
228 unsigned long baseclk, div;
230 #if defined(CONFIG_MGT5100)
231 baseclk = (CFG_MPC5XXX_CLKIN + 16) / 32;
232 #elif defined(CONFIG_MPC5200)
233 baseclk = (gd->ipb_clk + 16) / 32;
236 /* set up UART divisor */
237 div = (baseclk + (gd->baudrate/2)) / gd->baudrate;
238 psc->ctur = (div >> 8) & 0xFF;
239 psc->ctlr = div & 0xff;
242 #if defined(CONFIG_SERIAL_MULTI)
243 int serial0_init(void)
245 return (serial_init_dev(PSC_BASE));
248 int serial1_init(void)
250 return (serial_init_dev(PSC_BASE2));
252 void serial0_setbrg (void)
254 serial_setbrg_dev(PSC_BASE);
256 void serial1_setbrg (void)
258 serial_setbrg_dev(PSC_BASE2);
261 void serial0_putc(const char c)
263 serial_putc_dev(PSC_BASE,c);
266 void serial1_putc(const char c)
268 serial_putc_dev(PSC_BASE2, c);
270 void serial0_puts(const char *s)
272 serial_puts_dev(PSC_BASE, s);
275 void serial1_puts(const char *s)
277 serial_puts_dev(PSC_BASE2, s);
280 int serial0_getc(void)
282 return(serial_getc_dev(PSC_BASE));
285 int serial1_getc(void)
287 return(serial_getc_dev(PSC_BASE2));
289 int serial0_tstc(void)
291 return (serial_tstc_dev(PSC_BASE));
294 int serial1_tstc(void)
296 return (serial_tstc_dev(PSC_BASE2));
299 struct serial_device serial0_device =
311 struct serial_device serial1_device =
322 #endif /* CONFIG_SERIAL_MULTI */
324 #endif /* CONFIG_PSC_CONSOLE */