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wdenke85390d2002-04-01 14:29:03 +00001/*
2 * COM1 NS16550 support
Stefan Roesea47a12b2010-04-15 16:07:28 +02003 * originally from linux source (arch/powerpc/boot/ns16550.c)
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +02004 * modified to use CONFIG_SYS_ISA_MEM and new defines
wdenke85390d2002-04-01 14:29:03 +00005 */
6
Simon Glassfa54eb12014-09-04 16:27:32 -06007#include <common.h>
Paul Burton50fce1d2016-09-08 07:47:29 +01008#include <clk.h>
Simon Glass12e431b2014-09-04 16:27:34 -06009#include <dm.h>
10#include <errno.h>
wdenke85390d2002-04-01 14:29:03 +000011#include <ns16550.h>
Simon Glass12e431b2014-09-04 16:27:34 -060012#include <serial.h>
Ladislav Michla1b322a2010-02-01 23:34:25 +010013#include <watchdog.h>
Graeme Russ167cdad2010-04-24 00:05:46 +100014#include <linux/types.h>
15#include <asm/io.h>
wdenke85390d2002-04-01 14:29:03 +000016
Simon Glass12e431b2014-09-04 16:27:34 -060017DECLARE_GLOBAL_DATA_PTR;
18
Detlev Zundel200779e2009-04-03 11:53:01 +020019#define UART_LCRVAL UART_LCR_8N1 /* 8 data, 1 stop, no parity */
20#define UART_MCRVAL (UART_MCR_DTR | \
21 UART_MCR_RTS) /* RTS/DTR */
Simon Glass12e431b2014-09-04 16:27:34 -060022
23#ifndef CONFIG_DM_SERIAL
Graeme Russ167cdad2010-04-24 00:05:46 +100024#ifdef CONFIG_SYS_NS16550_PORT_MAPPED
Simon Glassf8df9d02011-10-15 19:14:09 +000025#define serial_out(x, y) outb(x, (ulong)y)
26#define serial_in(y) inb((ulong)y)
Dave Aldridge79df1202011-09-01 22:47:14 +000027#elif defined(CONFIG_SYS_NS16550_MEM32) && (CONFIG_SYS_NS16550_REG_SIZE > 0)
Simon Glassf8df9d02011-10-15 19:14:09 +000028#define serial_out(x, y) out_be32(y, x)
29#define serial_in(y) in_be32(y)
Dave Aldridge79df1202011-09-01 22:47:14 +000030#elif defined(CONFIG_SYS_NS16550_MEM32) && (CONFIG_SYS_NS16550_REG_SIZE < 0)
Simon Glassf8df9d02011-10-15 19:14:09 +000031#define serial_out(x, y) out_le32(y, x)
32#define serial_in(y) in_le32(y)
Graeme Russ167cdad2010-04-24 00:05:46 +100033#else
Simon Glassf8df9d02011-10-15 19:14:09 +000034#define serial_out(x, y) writeb(x, y)
35#define serial_in(y) readb(y)
Graeme Russ167cdad2010-04-24 00:05:46 +100036#endif
Simon Glass12e431b2014-09-04 16:27:34 -060037#endif /* !CONFIG_DM_SERIAL */
wdenke85390d2002-04-01 14:29:03 +000038
Khoronzhuk, Ivan7c387642014-07-16 00:59:25 +030039#if defined(CONFIG_SOC_KEYSTONE)
Vitaly Andrianovef509b92014-04-04 13:16:53 -040040#define UART_REG_VAL_PWREMU_MGMT_UART_DISABLE 0
41#define UART_REG_VAL_PWREMU_MGMT_UART_ENABLE ((1 << 14) | (1 << 13) | (1 << 0))
Karicheri, Muralidharand57dee52014-04-09 15:38:46 -040042#undef UART_MCRVAL
43#ifdef CONFIG_SERIAL_HW_FLOW_CONTROL
44#define UART_MCRVAL (UART_MCR_RTS | UART_MCR_AFE)
45#else
46#define UART_MCRVAL (UART_MCR_RTS)
47#endif
Vitaly Andrianovef509b92014-04-04 13:16:53 -040048#endif
49
Prafulla Wadaskara160ea02010-10-27 21:58:31 +053050#ifndef CONFIG_SYS_NS16550_IER
51#define CONFIG_SYS_NS16550_IER 0x00
52#endif /* CONFIG_SYS_NS16550_IER */
53
Simon Glass363e6da2015-02-27 22:06:26 -070054static inline void serial_out_shift(void *addr, int shift, int value)
Simon Glass76571672015-01-26 18:27:08 -070055{
56#ifdef CONFIG_SYS_NS16550_PORT_MAPPED
57 outb(value, (ulong)addr);
Bernhard Messerklinger78b7d372018-02-15 09:02:26 +010058#elif defined(CONFIG_SYS_NS16550_MEM32) && defined(CONFIG_SYS_LITTLE_ENDIAN)
Simon Glass76571672015-01-26 18:27:08 -070059 out_le32(addr, value);
60#elif defined(CONFIG_SYS_NS16550_MEM32) && defined(CONFIG_SYS_BIG_ENDIAN)
61 out_be32(addr, value);
Simon Glass90914002015-05-12 14:55:02 -060062#elif defined(CONFIG_SYS_NS16550_MEM32)
63 writel(value, addr);
Simon Glass76571672015-01-26 18:27:08 -070064#elif defined(CONFIG_SYS_BIG_ENDIAN)
65 writeb(value, addr + (1 << shift) - 1);
66#else
67 writeb(value, addr);
68#endif
69}
70
Simon Glass363e6da2015-02-27 22:06:26 -070071static inline int serial_in_shift(void *addr, int shift)
Simon Glass76571672015-01-26 18:27:08 -070072{
73#ifdef CONFIG_SYS_NS16550_PORT_MAPPED
74 return inb((ulong)addr);
Bernhard Messerklinger78b7d372018-02-15 09:02:26 +010075#elif defined(CONFIG_SYS_NS16550_MEM32) && defined(CONFIG_SYS_LITTLE_ENDIAN)
Simon Glass76571672015-01-26 18:27:08 -070076 return in_le32(addr);
77#elif defined(CONFIG_SYS_NS16550_MEM32) && defined(CONFIG_SYS_BIG_ENDIAN)
78 return in_be32(addr);
Simon Glass90914002015-05-12 14:55:02 -060079#elif defined(CONFIG_SYS_NS16550_MEM32)
80 return readl(addr);
Simon Glass76571672015-01-26 18:27:08 -070081#elif defined(CONFIG_SYS_BIG_ENDIAN)
Axel Lin20379c12015-02-28 15:55:36 +080082 return readb(addr + (1 << shift) - 1);
Simon Glass76571672015-01-26 18:27:08 -070083#else
84 return readb(addr);
85#endif
86}
87
Marek Vasutfa4ce722016-05-25 02:13:03 +020088#ifdef CONFIG_DM_SERIAL
89
90#ifndef CONFIG_SYS_NS16550_CLK
91#define CONFIG_SYS_NS16550_CLK 0
92#endif
93
Simon Glass12e431b2014-09-04 16:27:34 -060094static void ns16550_writeb(NS16550_t port, int offset, int value)
95{
96 struct ns16550_platdata *plat = port->plat;
97 unsigned char *addr;
98
99 offset *= 1 << plat->reg_shift;
Paul Burtondf8ec552016-05-17 07:43:26 +0100100 addr = (unsigned char *)plat->base + offset;
101
Simon Glass12e431b2014-09-04 16:27:34 -0600102 /*
103 * As far as we know it doesn't make sense to support selection of
104 * these options at run-time, so use the existing CONFIG options.
105 */
Michal Simek59b35dd2016-02-16 16:17:49 +0100106 serial_out_shift(addr + plat->reg_offset, plat->reg_shift, value);
Simon Glass12e431b2014-09-04 16:27:34 -0600107}
108
109static int ns16550_readb(NS16550_t port, int offset)
110{
111 struct ns16550_platdata *plat = port->plat;
112 unsigned char *addr;
113
114 offset *= 1 << plat->reg_shift;
Paul Burtondf8ec552016-05-17 07:43:26 +0100115 addr = (unsigned char *)plat->base + offset;
Simon Glass76571672015-01-26 18:27:08 -0700116
Michal Simek59b35dd2016-02-16 16:17:49 +0100117 return serial_in_shift(addr + plat->reg_offset, plat->reg_shift);
Simon Glass12e431b2014-09-04 16:27:34 -0600118}
119
Marek Vasut65f83802016-12-01 02:06:29 +0100120static u32 ns16550_getfcr(NS16550_t port)
121{
122 struct ns16550_platdata *plat = port->plat;
123
124 return plat->fcr;
125}
126
Simon Glass12e431b2014-09-04 16:27:34 -0600127/* We can clean these up once everything is moved to driver model */
128#define serial_out(value, addr) \
Simon Glass363e6da2015-02-27 22:06:26 -0700129 ns16550_writeb(com_port, \
130 (unsigned char *)addr - (unsigned char *)com_port, value)
Simon Glass12e431b2014-09-04 16:27:34 -0600131#define serial_in(addr) \
Simon Glass363e6da2015-02-27 22:06:26 -0700132 ns16550_readb(com_port, \
133 (unsigned char *)addr - (unsigned char *)com_port)
Marek Vasut65f83802016-12-01 02:06:29 +0100134#else
135static u32 ns16550_getfcr(NS16550_t port)
136{
Heiko Schocher17fa0322017-01-18 08:05:49 +0100137 return UART_FCR_DEFVAL;
Marek Vasut65f83802016-12-01 02:06:29 +0100138}
Simon Glass12e431b2014-09-04 16:27:34 -0600139#endif
140
Marek Vasut03c6f172016-05-25 02:13:16 +0200141int ns16550_calc_divisor(NS16550_t port, int clock, int baudrate)
Simon Glassfa54eb12014-09-04 16:27:32 -0600142{
143 const unsigned int mode_x_div = 16;
144
Simon Glass21d00432015-01-26 18:27:09 -0700145 return DIV_ROUND_CLOSEST(clock, mode_x_div * baudrate);
146}
147
Simon Glass8bbe33c2014-09-04 16:27:33 -0600148static void NS16550_setbrg(NS16550_t com_port, int baud_divisor)
149{
150 serial_out(UART_LCR_BKSE | UART_LCRVAL, &com_port->lcr);
151 serial_out(baud_divisor & 0xff, &com_port->dll);
152 serial_out((baud_divisor >> 8) & 0xff, &com_port->dlm);
153 serial_out(UART_LCRVAL, &com_port->lcr);
154}
155
Simon Glassf8df9d02011-10-15 19:14:09 +0000156void NS16550_init(NS16550_t com_port, int baud_divisor)
wdenke85390d2002-04-01 14:29:03 +0000157{
Gregoire Gentil956a8ba2014-11-10 11:04:10 -0800158#if (defined(CONFIG_SPL_BUILD) && \
159 (defined(CONFIG_OMAP34XX) || defined(CONFIG_OMAP44XX)))
Manfred Huberfd2aeac2013-03-29 02:52:36 +0000160 /*
Gregoire Gentil956a8ba2014-11-10 11:04:10 -0800161 * On some OMAP3/OMAP4 devices when UART3 is configured for boot mode
162 * before SPL starts only THRE bit is set. We have to empty the
163 * transmitter before initialization starts.
Manfred Huberfd2aeac2013-03-29 02:52:36 +0000164 */
165 if ((serial_in(&com_port->lsr) & (UART_LSR_TEMT | UART_LSR_THRE))
166 == UART_LSR_THRE) {
Simon Glass12e431b2014-09-04 16:27:34 -0600167 if (baud_divisor != -1)
168 NS16550_setbrg(com_port, baud_divisor);
Manfred Huberfd2aeac2013-03-29 02:52:36 +0000169 serial_out(0, &com_port->mdr1);
170 }
171#endif
172
Scott Woodcb55b332012-09-18 18:19:05 -0500173 while (!(serial_in(&com_port->lsr) & UART_LSR_TEMT))
174 ;
175
Prafulla Wadaskara160ea02010-10-27 21:58:31 +0530176 serial_out(CONFIG_SYS_NS16550_IER, &com_port->ier);
Tom Rini89024dd2017-05-12 22:33:16 -0400177#if defined(CONFIG_ARCH_OMAP2PLUS)
Graeme Russ167cdad2010-04-24 00:05:46 +1000178 serial_out(0x7, &com_port->mdr1); /* mode select reset TL16C750*/
wdenk945af8d2003-07-16 21:53:01 +0000179#endif
Graeme Russ167cdad2010-04-24 00:05:46 +1000180 serial_out(UART_MCRVAL, &com_port->mcr);
Marek Vasut65f83802016-12-01 02:06:29 +0100181 serial_out(ns16550_getfcr(com_port), &com_port->fcr);
Simon Glass12e431b2014-09-04 16:27:34 -0600182 if (baud_divisor != -1)
183 NS16550_setbrg(com_port, baud_divisor);
Tom Rini89024dd2017-05-12 22:33:16 -0400184#if defined(CONFIG_ARCH_OMAP2PLUS) || defined(CONFIG_SOC_DA8XX)
Simon Glassf8df9d02011-10-15 19:14:09 +0000185 /* /16 is proper to hit 115200 with 48MHz */
186 serial_out(0, &com_port->mdr1);
Tom Rini89024dd2017-05-12 22:33:16 -0400187#endif
Khoronzhuk, Ivan7c387642014-07-16 00:59:25 +0300188#if defined(CONFIG_SOC_KEYSTONE)
Vitaly Andrianovef509b92014-04-04 13:16:53 -0400189 serial_out(UART_REG_VAL_PWREMU_MGMT_UART_ENABLE, &com_port->regC);
190#endif
wdenke85390d2002-04-01 14:29:03 +0000191}
192
Ron Madridf5675aa2009-02-18 14:30:44 -0800193#ifndef CONFIG_NS16550_MIN_FUNCTIONS
Simon Glassf8df9d02011-10-15 19:14:09 +0000194void NS16550_reinit(NS16550_t com_port, int baud_divisor)
wdenke85390d2002-04-01 14:29:03 +0000195{
Prafulla Wadaskara160ea02010-10-27 21:58:31 +0530196 serial_out(CONFIG_SYS_NS16550_IER, &com_port->ier);
Simon Glass8bbe33c2014-09-04 16:27:33 -0600197 NS16550_setbrg(com_port, 0);
Graeme Russ167cdad2010-04-24 00:05:46 +1000198 serial_out(UART_MCRVAL, &com_port->mcr);
Marek Vasut65f83802016-12-01 02:06:29 +0100199 serial_out(ns16550_getfcr(com_port), &com_port->fcr);
Simon Glass8bbe33c2014-09-04 16:27:33 -0600200 NS16550_setbrg(com_port, baud_divisor);
wdenke85390d2002-04-01 14:29:03 +0000201}
Ron Madridf5675aa2009-02-18 14:30:44 -0800202#endif /* CONFIG_NS16550_MIN_FUNCTIONS */
wdenke85390d2002-04-01 14:29:03 +0000203
Simon Glassf8df9d02011-10-15 19:14:09 +0000204void NS16550_putc(NS16550_t com_port, char c)
wdenke85390d2002-04-01 14:29:03 +0000205{
Simon Glassf8df9d02011-10-15 19:14:09 +0000206 while ((serial_in(&com_port->lsr) & UART_LSR_THRE) == 0)
207 ;
Graeme Russ167cdad2010-04-24 00:05:46 +1000208 serial_out(c, &com_port->thr);
Stefan Roese1a2d9b32010-10-12 09:39:45 +0200209
210 /*
211 * Call watchdog_reset() upon newline. This is done here in putc
212 * since the environment code uses a single puts() to print the complete
213 * environment upon "printenv". So we can't put this watchdog call
214 * in puts().
215 */
216 if (c == '\n')
217 WATCHDOG_RESET();
wdenke85390d2002-04-01 14:29:03 +0000218}
219
Ron Madridf5675aa2009-02-18 14:30:44 -0800220#ifndef CONFIG_NS16550_MIN_FUNCTIONS
Simon Glassf8df9d02011-10-15 19:14:09 +0000221char NS16550_getc(NS16550_t com_port)
wdenke85390d2002-04-01 14:29:03 +0000222{
Graeme Russ167cdad2010-04-24 00:05:46 +1000223 while ((serial_in(&com_port->lsr) & UART_LSR_DR) == 0) {
Marek Vasutf2041382012-09-15 10:25:19 +0200224#if !defined(CONFIG_SPL_BUILD) && defined(CONFIG_USB_TTY)
wdenk232c1502004-03-12 00:14:09 +0000225 extern void usbtty_poll(void);
226 usbtty_poll();
227#endif
Ladislav Michla1b322a2010-02-01 23:34:25 +0100228 WATCHDOG_RESET();
wdenk232c1502004-03-12 00:14:09 +0000229 }
Graeme Russ167cdad2010-04-24 00:05:46 +1000230 return serial_in(&com_port->rbr);
wdenke85390d2002-04-01 14:29:03 +0000231}
232
Simon Glassf8df9d02011-10-15 19:14:09 +0000233int NS16550_tstc(NS16550_t com_port)
wdenke85390d2002-04-01 14:29:03 +0000234{
Simon Glassf8df9d02011-10-15 19:14:09 +0000235 return (serial_in(&com_port->lsr) & UART_LSR_DR) != 0;
wdenke85390d2002-04-01 14:29:03 +0000236}
237
Ron Madridf5675aa2009-02-18 14:30:44 -0800238#endif /* CONFIG_NS16550_MIN_FUNCTIONS */
Simon Glass12e431b2014-09-04 16:27:34 -0600239
Simon Glass21d00432015-01-26 18:27:09 -0700240#ifdef CONFIG_DEBUG_UART_NS16550
241
242#include <debug_uart.h>
243
Simon Glass97b05972015-10-18 19:51:23 -0600244static inline void _debug_uart_init(void)
Simon Glass21d00432015-01-26 18:27:09 -0700245{
246 struct NS16550 *com_port = (struct NS16550 *)CONFIG_DEBUG_UART_BASE;
247 int baud_divisor;
248
249 /*
250 * We copy the code from above because it is already horribly messy.
251 * Trying to refactor to nicely remove the duplication doesn't seem
252 * feasible. The better fix is to move all users of this driver to
253 * driver model.
254 */
Marek Vasut03c6f172016-05-25 02:13:16 +0200255 baud_divisor = ns16550_calc_divisor(com_port, CONFIG_DEBUG_UART_CLOCK,
256 CONFIG_BAUDRATE);
Simon Glass6e780c72015-06-23 15:39:06 -0600257 serial_dout(&com_port->ier, CONFIG_SYS_NS16550_IER);
258 serial_dout(&com_port->mcr, UART_MCRVAL);
Heiko Schocher17fa0322017-01-18 08:05:49 +0100259 serial_dout(&com_port->fcr, UART_FCR_DEFVAL);
Simon Glass21d00432015-01-26 18:27:09 -0700260
Simon Glass6e780c72015-06-23 15:39:06 -0600261 serial_dout(&com_port->lcr, UART_LCR_BKSE | UART_LCRVAL);
262 serial_dout(&com_port->dll, baud_divisor & 0xff);
263 serial_dout(&com_port->dlm, (baud_divisor >> 8) & 0xff);
264 serial_dout(&com_port->lcr, UART_LCRVAL);
Simon Glass21d00432015-01-26 18:27:09 -0700265}
266
267static inline void _debug_uart_putc(int ch)
268{
269 struct NS16550 *com_port = (struct NS16550 *)CONFIG_DEBUG_UART_BASE;
270
Simon Glass6e780c72015-06-23 15:39:06 -0600271 while (!(serial_din(&com_port->lsr) & UART_LSR_THRE))
Simon Glass21d00432015-01-26 18:27:09 -0700272 ;
Simon Glass6e780c72015-06-23 15:39:06 -0600273 serial_dout(&com_port->thr, ch);
Simon Glass21d00432015-01-26 18:27:09 -0700274}
275
276DEBUG_UART_FUNCS
277
278#endif
279
Lokesh Vutlaa52cf082017-04-22 15:57:25 +0530280#ifdef CONFIG_DEBUG_UART_OMAP
281
282#include <debug_uart.h>
283
284static inline void _debug_uart_init(void)
285{
286 struct NS16550 *com_port = (struct NS16550 *)CONFIG_DEBUG_UART_BASE;
287 int baud_divisor;
288
289 baud_divisor = ns16550_calc_divisor(com_port, CONFIG_DEBUG_UART_CLOCK,
290 CONFIG_BAUDRATE);
291 serial_dout(&com_port->ier, CONFIG_SYS_NS16550_IER);
292 serial_dout(&com_port->mdr1, 0x7);
293 serial_dout(&com_port->mcr, UART_MCRVAL);
294 serial_dout(&com_port->fcr, UART_FCR_DEFVAL);
295
296 serial_dout(&com_port->lcr, UART_LCR_BKSE | UART_LCRVAL);
297 serial_dout(&com_port->dll, baud_divisor & 0xff);
298 serial_dout(&com_port->dlm, (baud_divisor >> 8) & 0xff);
299 serial_dout(&com_port->lcr, UART_LCRVAL);
300 serial_dout(&com_port->mdr1, 0x0);
301}
302
303static inline void _debug_uart_putc(int ch)
304{
305 struct NS16550 *com_port = (struct NS16550 *)CONFIG_DEBUG_UART_BASE;
306
307 while (!(serial_din(&com_port->lsr) & UART_LSR_THRE))
308 ;
309 serial_dout(&com_port->thr, ch);
310}
311
312DEBUG_UART_FUNCS
313
314#endif
315
Simon Glass12e431b2014-09-04 16:27:34 -0600316#ifdef CONFIG_DM_SERIAL
317static int ns16550_serial_putc(struct udevice *dev, const char ch)
318{
319 struct NS16550 *const com_port = dev_get_priv(dev);
320
321 if (!(serial_in(&com_port->lsr) & UART_LSR_THRE))
322 return -EAGAIN;
323 serial_out(ch, &com_port->thr);
324
325 /*
326 * Call watchdog_reset() upon newline. This is done here in putc
327 * since the environment code uses a single puts() to print the complete
328 * environment upon "printenv". So we can't put this watchdog call
329 * in puts().
330 */
331 if (ch == '\n')
332 WATCHDOG_RESET();
333
334 return 0;
335}
336
337static int ns16550_serial_pending(struct udevice *dev, bool input)
338{
339 struct NS16550 *const com_port = dev_get_priv(dev);
340
341 if (input)
Mario Six4dbf9be2018-01-15 11:09:49 +0100342 return (serial_in(&com_port->lsr) & UART_LSR_DR) ? 1 : 0;
Simon Glass12e431b2014-09-04 16:27:34 -0600343 else
Mario Six4dbf9be2018-01-15 11:09:49 +0100344 return (serial_in(&com_port->lsr) & UART_LSR_THRE) ? 0 : 1;
Simon Glass12e431b2014-09-04 16:27:34 -0600345}
346
347static int ns16550_serial_getc(struct udevice *dev)
348{
Stefan Roese7fded0c2017-08-16 17:37:15 +0200349 struct NS16550 *const com_port = dev_get_priv(dev);
350
351 if (!(serial_in(&com_port->lsr) & UART_LSR_DR))
Simon Glass12e431b2014-09-04 16:27:34 -0600352 return -EAGAIN;
353
Stefan Roese7fded0c2017-08-16 17:37:15 +0200354 return serial_in(&com_port->rbr);
Simon Glass12e431b2014-09-04 16:27:34 -0600355}
356
357static int ns16550_serial_setbrg(struct udevice *dev, int baudrate)
358{
359 struct NS16550 *const com_port = dev_get_priv(dev);
360 struct ns16550_platdata *plat = com_port->plat;
361 int clock_divisor;
362
363 clock_divisor = ns16550_calc_divisor(com_port, plat->clock, baudrate);
364
365 NS16550_setbrg(com_port, clock_divisor);
366
367 return 0;
368}
369
370int ns16550_serial_probe(struct udevice *dev)
371{
372 struct NS16550 *const com_port = dev_get_priv(dev);
373
Simon Glass11c1a872014-10-22 21:37:05 -0600374 com_port->plat = dev_get_platdata(dev);
Simon Glass12e431b2014-09-04 16:27:34 -0600375 NS16550_init(com_port, -1);
376
377 return 0;
378}
379
Marek Vasut79fd9282016-12-01 02:06:30 +0100380#if CONFIG_IS_ENABLED(OF_CONTROL)
381enum {
382 PORT_NS16550 = 0,
Marek Vasut0b060ee2016-12-01 02:06:31 +0100383 PORT_JZ4780,
Marek Vasut79fd9282016-12-01 02:06:30 +0100384};
385#endif
386
Simon Glassb2927fb2016-07-04 11:58:23 -0600387#if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)
Simon Glass12e431b2014-09-04 16:27:34 -0600388int ns16550_serial_ofdata_to_platdata(struct udevice *dev)
389{
Simon Glass12e431b2014-09-04 16:27:34 -0600390 struct ns16550_platdata *plat = dev->platdata;
Marek Vasut0b060ee2016-12-01 02:06:31 +0100391 const u32 port_type = dev_get_driver_data(dev);
Simon Glass12e431b2014-09-04 16:27:34 -0600392 fdt_addr_t addr;
Masahiro Yamada021abf62016-09-26 20:45:27 +0900393 struct clk clk;
394 int err;
Simon Glass12e431b2014-09-04 16:27:34 -0600395
Bin Meng3db886a2014-12-31 16:05:12 +0800396 /* try Processor Local Bus device first */
Simon Glassdb9f8f62017-06-12 06:21:56 -0600397 addr = dev_read_addr(dev);
Simon Glassfcc0a872015-11-29 13:17:54 -0700398#if defined(CONFIG_PCI) && defined(CONFIG_DM_PCI)
Bin Meng3db886a2014-12-31 16:05:12 +0800399 if (addr == FDT_ADDR_T_NONE) {
400 /* then try pci device */
401 struct fdt_pci_addr pci_addr;
402 u32 bar;
403 int ret;
404
405 /* we prefer to use a memory-mapped register */
Simon Glasse160f7d2017-01-17 16:52:55 -0700406 ret = fdtdec_get_pci_addr(gd->fdt_blob, dev_of_offset(dev),
Bin Meng3db886a2014-12-31 16:05:12 +0800407 FDT_PCI_SPACE_MEM32, "reg",
408 &pci_addr);
409 if (ret) {
410 /* try if there is any i/o-mapped register */
411 ret = fdtdec_get_pci_addr(gd->fdt_blob,
Simon Glasse160f7d2017-01-17 16:52:55 -0700412 dev_of_offset(dev),
Bin Meng3db886a2014-12-31 16:05:12 +0800413 FDT_PCI_SPACE_IO,
414 "reg", &pci_addr);
415 if (ret)
416 return ret;
417 }
418
Simon Glassfcc0a872015-11-29 13:17:54 -0700419 ret = fdtdec_get_pci_bar32(dev, &pci_addr, &bar);
Bin Meng3db886a2014-12-31 16:05:12 +0800420 if (ret)
421 return ret;
422
423 addr = bar;
424 }
425#endif
426
Simon Glass12e431b2014-09-04 16:27:34 -0600427 if (addr == FDT_ADDR_T_NONE)
428 return -EINVAL;
429
Paul Burtondf8ec552016-05-17 07:43:26 +0100430#ifdef CONFIG_SYS_NS16550_PORT_MAPPED
Simon Glass167efe02014-10-22 21:37:04 -0600431 plat->base = addr;
Paul Burtondf8ec552016-05-17 07:43:26 +0100432#else
433 plat->base = (unsigned long)map_physmem(addr, 0, MAP_NOCACHE);
434#endif
435
Philipp Tomsich3d404792017-06-07 18:46:02 +0200436 plat->reg_offset = dev_read_u32_default(dev, "reg-offset", 0);
437 plat->reg_shift = dev_read_u32_default(dev, "reg-shift", 0);
Paul Burton50fce1d2016-09-08 07:47:29 +0100438
439 err = clk_get_by_index(dev, 0, &clk);
440 if (!err) {
441 err = clk_get_rate(&clk);
442 if (!IS_ERR_VALUE(err))
443 plat->clock = err;
Alexandre Courbotab895d62016-09-30 17:37:00 +0900444 } else if (err != -ENOENT && err != -ENODEV && err != -ENOSYS) {
Paul Burton50fce1d2016-09-08 07:47:29 +0100445 debug("ns16550 failed to get clock\n");
446 return err;
447 }
448
449 if (!plat->clock)
Philipp Tomsich3d404792017-06-07 18:46:02 +0200450 plat->clock = dev_read_u32_default(dev, "clock-frequency",
451 CONFIG_SYS_NS16550_CLK);
Thomas Chou8e62d322015-11-19 21:48:05 +0800452 if (!plat->clock) {
453 debug("ns16550 clock not defined\n");
454 return -EINVAL;
455 }
Simon Glass12e431b2014-09-04 16:27:34 -0600456
Heiko Schocher17fa0322017-01-18 08:05:49 +0100457 plat->fcr = UART_FCR_DEFVAL;
Marek Vasut0b060ee2016-12-01 02:06:31 +0100458 if (port_type == PORT_JZ4780)
459 plat->fcr |= UART_FCR_UME;
Marek Vasut65f83802016-12-01 02:06:29 +0100460
Simon Glass12e431b2014-09-04 16:27:34 -0600461 return 0;
462}
Simon Glass11c1a872014-10-22 21:37:05 -0600463#endif
Simon Glass12e431b2014-09-04 16:27:34 -0600464
465const struct dm_serial_ops ns16550_serial_ops = {
466 .putc = ns16550_serial_putc,
467 .pending = ns16550_serial_pending,
468 .getc = ns16550_serial_getc,
469 .setbrg = ns16550_serial_setbrg,
470};
Thomas Chou8e62d322015-11-19 21:48:05 +0800471
Alexandru Gagniuc6f8c3512017-03-27 12:54:19 -0700472#if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)
Thomas Choucc4228f2015-12-14 20:45:09 +0800473/*
474 * Please consider existing compatible strings before adding a new
475 * one to keep this table compact. Or you may add a generic "ns16550"
476 * compatible string to your dts.
477 */
Thomas Chou8e62d322015-11-19 21:48:05 +0800478static const struct udevice_id ns16550_serial_ids[] = {
Marek Vasut79fd9282016-12-01 02:06:30 +0100479 { .compatible = "ns16550", .data = PORT_NS16550 },
480 { .compatible = "ns16550a", .data = PORT_NS16550 },
Marek Vasut0b060ee2016-12-01 02:06:31 +0100481 { .compatible = "ingenic,jz4780-uart", .data = PORT_JZ4780 },
Marek Vasut79fd9282016-12-01 02:06:30 +0100482 { .compatible = "nvidia,tegra20-uart", .data = PORT_NS16550 },
483 { .compatible = "snps,dw-apb-uart", .data = PORT_NS16550 },
484 { .compatible = "ti,omap2-uart", .data = PORT_NS16550 },
485 { .compatible = "ti,omap3-uart", .data = PORT_NS16550 },
486 { .compatible = "ti,omap4-uart", .data = PORT_NS16550 },
487 { .compatible = "ti,am3352-uart", .data = PORT_NS16550 },
488 { .compatible = "ti,am4372-uart", .data = PORT_NS16550 },
489 { .compatible = "ti,dra742-uart", .data = PORT_NS16550 },
Thomas Chou8e62d322015-11-19 21:48:05 +0800490 {}
491};
Alexandru Gagniuc6f8c3512017-03-27 12:54:19 -0700492#endif /* OF_CONTROL && !OF_PLATDATA */
Thomas Chou8e62d322015-11-19 21:48:05 +0800493
Simon Glassb7e29832015-12-13 21:36:59 -0700494#if CONFIG_IS_ENABLED(SERIAL_PRESENT)
Alexandru Gagniuc6f8c3512017-03-27 12:54:19 -0700495
496/* TODO(sjg@chromium.org): Integrate this into a macro like CONFIG_IS_ENABLED */
497#if !defined(CONFIG_TPL_BUILD) || defined(CONFIG_TPL_DM_SERIAL)
Thomas Chou8e62d322015-11-19 21:48:05 +0800498U_BOOT_DRIVER(ns16550_serial) = {
499 .name = "ns16550_serial",
500 .id = UCLASS_SERIAL,
Alexandru Gagniuc6f8c3512017-03-27 12:54:19 -0700501#if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)
Thomas Chou8e62d322015-11-19 21:48:05 +0800502 .of_match = ns16550_serial_ids,
503 .ofdata_to_platdata = ns16550_serial_ofdata_to_platdata,
504 .platdata_auto_alloc_size = sizeof(struct ns16550_platdata),
505#endif
506 .priv_auto_alloc_size = sizeof(struct NS16550),
507 .probe = ns16550_serial_probe,
508 .ops = &ns16550_serial_ops,
Simon Glassb7e5a642015-12-04 08:58:38 -0700509 .flags = DM_FLAG_PRE_RELOC,
Thomas Chou8e62d322015-11-19 21:48:05 +0800510};
Simon Glassb7e29832015-12-13 21:36:59 -0700511#endif
Alexandru Gagniuc6f8c3512017-03-27 12:54:19 -0700512#endif /* SERIAL_PRESENT */
513
Simon Glass12e431b2014-09-04 16:27:34 -0600514#endif /* CONFIG_DM_SERIAL */