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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>
11#include <fdtdec.h>
wdenke85390d2002-04-01 14:29:03 +000012#include <ns16550.h>
Simon Glass12e431b2014-09-04 16:27:34 -060013#include <serial.h>
Ladislav Michla1b322a2010-02-01 23:34:25 +010014#include <watchdog.h>
Graeme Russ167cdad2010-04-24 00:05:46 +100015#include <linux/types.h>
16#include <asm/io.h>
wdenke85390d2002-04-01 14:29:03 +000017
Simon Glass12e431b2014-09-04 16:27:34 -060018DECLARE_GLOBAL_DATA_PTR;
19
Detlev Zundel200779e2009-04-03 11:53:01 +020020#define UART_LCRVAL UART_LCR_8N1 /* 8 data, 1 stop, no parity */
21#define UART_MCRVAL (UART_MCR_DTR | \
22 UART_MCR_RTS) /* RTS/DTR */
Simon Glass12e431b2014-09-04 16:27:34 -060023
24#ifndef CONFIG_DM_SERIAL
Graeme Russ167cdad2010-04-24 00:05:46 +100025#ifdef CONFIG_SYS_NS16550_PORT_MAPPED
Simon Glassf8df9d02011-10-15 19:14:09 +000026#define serial_out(x, y) outb(x, (ulong)y)
27#define serial_in(y) inb((ulong)y)
Dave Aldridge79df1202011-09-01 22:47:14 +000028#elif defined(CONFIG_SYS_NS16550_MEM32) && (CONFIG_SYS_NS16550_REG_SIZE > 0)
Simon Glassf8df9d02011-10-15 19:14:09 +000029#define serial_out(x, y) out_be32(y, x)
30#define serial_in(y) in_be32(y)
Dave Aldridge79df1202011-09-01 22:47:14 +000031#elif defined(CONFIG_SYS_NS16550_MEM32) && (CONFIG_SYS_NS16550_REG_SIZE < 0)
Simon Glassf8df9d02011-10-15 19:14:09 +000032#define serial_out(x, y) out_le32(y, x)
33#define serial_in(y) in_le32(y)
Graeme Russ167cdad2010-04-24 00:05:46 +100034#else
Simon Glassf8df9d02011-10-15 19:14:09 +000035#define serial_out(x, y) writeb(x, y)
36#define serial_in(y) readb(y)
Graeme Russ167cdad2010-04-24 00:05:46 +100037#endif
Simon Glass12e431b2014-09-04 16:27:34 -060038#endif /* !CONFIG_DM_SERIAL */
wdenke85390d2002-04-01 14:29:03 +000039
Khoronzhuk, Ivan7c387642014-07-16 00:59:25 +030040#if defined(CONFIG_SOC_KEYSTONE)
Vitaly Andrianovef509b92014-04-04 13:16:53 -040041#define UART_REG_VAL_PWREMU_MGMT_UART_DISABLE 0
42#define UART_REG_VAL_PWREMU_MGMT_UART_ENABLE ((1 << 14) | (1 << 13) | (1 << 0))
Karicheri, Muralidharand57dee52014-04-09 15:38:46 -040043#undef UART_MCRVAL
44#ifdef CONFIG_SERIAL_HW_FLOW_CONTROL
45#define UART_MCRVAL (UART_MCR_RTS | UART_MCR_AFE)
46#else
47#define UART_MCRVAL (UART_MCR_RTS)
48#endif
Vitaly Andrianovef509b92014-04-04 13:16:53 -040049#endif
50
Prafulla Wadaskara160ea02010-10-27 21:58:31 +053051#ifndef CONFIG_SYS_NS16550_IER
52#define CONFIG_SYS_NS16550_IER 0x00
53#endif /* CONFIG_SYS_NS16550_IER */
54
Simon Glass363e6da2015-02-27 22:06:26 -070055static inline void serial_out_shift(void *addr, int shift, int value)
Simon Glass76571672015-01-26 18:27:08 -070056{
57#ifdef CONFIG_SYS_NS16550_PORT_MAPPED
58 outb(value, (ulong)addr);
59#elif defined(CONFIG_SYS_NS16550_MEM32) && !defined(CONFIG_SYS_BIG_ENDIAN)
60 out_le32(addr, value);
61#elif defined(CONFIG_SYS_NS16550_MEM32) && defined(CONFIG_SYS_BIG_ENDIAN)
62 out_be32(addr, value);
Simon Glass90914002015-05-12 14:55:02 -060063#elif defined(CONFIG_SYS_NS16550_MEM32)
64 writel(value, addr);
Simon Glass76571672015-01-26 18:27:08 -070065#elif defined(CONFIG_SYS_BIG_ENDIAN)
66 writeb(value, addr + (1 << shift) - 1);
67#else
68 writeb(value, addr);
69#endif
70}
71
Simon Glass363e6da2015-02-27 22:06:26 -070072static inline int serial_in_shift(void *addr, int shift)
Simon Glass76571672015-01-26 18:27:08 -070073{
74#ifdef CONFIG_SYS_NS16550_PORT_MAPPED
75 return inb((ulong)addr);
76#elif defined(CONFIG_SYS_NS16550_MEM32) && !defined(CONFIG_SYS_BIG_ENDIAN)
77 return in_le32(addr);
78#elif defined(CONFIG_SYS_NS16550_MEM32) && defined(CONFIG_SYS_BIG_ENDIAN)
79 return in_be32(addr);
Simon Glass90914002015-05-12 14:55:02 -060080#elif defined(CONFIG_SYS_NS16550_MEM32)
81 return readl(addr);
Simon Glass76571672015-01-26 18:27:08 -070082#elif defined(CONFIG_SYS_BIG_ENDIAN)
Axel Lin20379c12015-02-28 15:55:36 +080083 return readb(addr + (1 << shift) - 1);
Simon Glass76571672015-01-26 18:27:08 -070084#else
85 return readb(addr);
86#endif
87}
88
Marek Vasutfa4ce722016-05-25 02:13:03 +020089#ifdef CONFIG_DM_SERIAL
90
91#ifndef CONFIG_SYS_NS16550_CLK
92#define CONFIG_SYS_NS16550_CLK 0
93#endif
94
Simon Glass12e431b2014-09-04 16:27:34 -060095static void ns16550_writeb(NS16550_t port, int offset, int value)
96{
97 struct ns16550_platdata *plat = port->plat;
98 unsigned char *addr;
99
100 offset *= 1 << plat->reg_shift;
Paul Burtondf8ec552016-05-17 07:43:26 +0100101 addr = (unsigned char *)plat->base + offset;
102
Simon Glass12e431b2014-09-04 16:27:34 -0600103 /*
104 * As far as we know it doesn't make sense to support selection of
105 * these options at run-time, so use the existing CONFIG options.
106 */
Michal Simek59b35dd2016-02-16 16:17:49 +0100107 serial_out_shift(addr + plat->reg_offset, plat->reg_shift, value);
Simon Glass12e431b2014-09-04 16:27:34 -0600108}
109
110static int ns16550_readb(NS16550_t port, int offset)
111{
112 struct ns16550_platdata *plat = port->plat;
113 unsigned char *addr;
114
115 offset *= 1 << plat->reg_shift;
Paul Burtondf8ec552016-05-17 07:43:26 +0100116 addr = (unsigned char *)plat->base + offset;
Simon Glass76571672015-01-26 18:27:08 -0700117
Michal Simek59b35dd2016-02-16 16:17:49 +0100118 return serial_in_shift(addr + plat->reg_offset, plat->reg_shift);
Simon Glass12e431b2014-09-04 16:27:34 -0600119}
120
Marek Vasut65f83802016-12-01 02:06:29 +0100121static u32 ns16550_getfcr(NS16550_t port)
122{
123 struct ns16550_platdata *plat = port->plat;
124
125 return plat->fcr;
126}
127
Simon Glass12e431b2014-09-04 16:27:34 -0600128/* We can clean these up once everything is moved to driver model */
129#define serial_out(value, addr) \
Simon Glass363e6da2015-02-27 22:06:26 -0700130 ns16550_writeb(com_port, \
131 (unsigned char *)addr - (unsigned char *)com_port, value)
Simon Glass12e431b2014-09-04 16:27:34 -0600132#define serial_in(addr) \
Simon Glass363e6da2015-02-27 22:06:26 -0700133 ns16550_readb(com_port, \
134 (unsigned char *)addr - (unsigned char *)com_port)
Marek Vasut65f83802016-12-01 02:06:29 +0100135#else
136static u32 ns16550_getfcr(NS16550_t port)
137{
Heiko Schocher17fa0322017-01-18 08:05:49 +0100138 return UART_FCR_DEFVAL;
Marek Vasut65f83802016-12-01 02:06:29 +0100139}
Simon Glass12e431b2014-09-04 16:27:34 -0600140#endif
141
Marek Vasut03c6f172016-05-25 02:13:16 +0200142int ns16550_calc_divisor(NS16550_t port, int clock, int baudrate)
Simon Glassfa54eb12014-09-04 16:27:32 -0600143{
144 const unsigned int mode_x_div = 16;
145
Simon Glass21d00432015-01-26 18:27:09 -0700146 return DIV_ROUND_CLOSEST(clock, mode_x_div * baudrate);
147}
148
Simon Glass8bbe33c2014-09-04 16:27:33 -0600149static void NS16550_setbrg(NS16550_t com_port, int baud_divisor)
150{
151 serial_out(UART_LCR_BKSE | UART_LCRVAL, &com_port->lcr);
152 serial_out(baud_divisor & 0xff, &com_port->dll);
153 serial_out((baud_divisor >> 8) & 0xff, &com_port->dlm);
154 serial_out(UART_LCRVAL, &com_port->lcr);
155}
156
Simon Glassf8df9d02011-10-15 19:14:09 +0000157void NS16550_init(NS16550_t com_port, int baud_divisor)
wdenke85390d2002-04-01 14:29:03 +0000158{
Gregoire Gentil956a8ba2014-11-10 11:04:10 -0800159#if (defined(CONFIG_SPL_BUILD) && \
160 (defined(CONFIG_OMAP34XX) || defined(CONFIG_OMAP44XX)))
Manfred Huberfd2aeac2013-03-29 02:52:36 +0000161 /*
Gregoire Gentil956a8ba2014-11-10 11:04:10 -0800162 * On some OMAP3/OMAP4 devices when UART3 is configured for boot mode
163 * before SPL starts only THRE bit is set. We have to empty the
164 * transmitter before initialization starts.
Manfred Huberfd2aeac2013-03-29 02:52:36 +0000165 */
166 if ((serial_in(&com_port->lsr) & (UART_LSR_TEMT | UART_LSR_THRE))
167 == UART_LSR_THRE) {
Simon Glass12e431b2014-09-04 16:27:34 -0600168 if (baud_divisor != -1)
169 NS16550_setbrg(com_port, baud_divisor);
Manfred Huberfd2aeac2013-03-29 02:52:36 +0000170 serial_out(0, &com_port->mdr1);
171 }
172#endif
173
Scott Woodcb55b332012-09-18 18:19:05 -0500174 while (!(serial_in(&com_port->lsr) & UART_LSR_TEMT))
175 ;
176
Prafulla Wadaskara160ea02010-10-27 21:58:31 +0530177 serial_out(CONFIG_SYS_NS16550_IER, &com_port->ier);
Tom Rini456ccfd2013-12-20 11:19:33 -0500178#if defined(CONFIG_OMAP) || defined(CONFIG_AM33XX) || \
179 defined(CONFIG_TI81XX) || defined(CONFIG_AM43XX)
Graeme Russ167cdad2010-04-24 00:05:46 +1000180 serial_out(0x7, &com_port->mdr1); /* mode select reset TL16C750*/
wdenk945af8d2003-07-16 21:53:01 +0000181#endif
Graeme Russ167cdad2010-04-24 00:05:46 +1000182 serial_out(UART_MCRVAL, &com_port->mcr);
Marek Vasut65f83802016-12-01 02:06:29 +0100183 serial_out(ns16550_getfcr(com_port), &com_port->fcr);
Simon Glass12e431b2014-09-04 16:27:34 -0600184 if (baud_divisor != -1)
185 NS16550_setbrg(com_port, baud_divisor);
Masahiro Yamada8ac22a62014-07-30 19:11:41 +0900186#if defined(CONFIG_OMAP) || \
Matt Porter6213a682013-03-15 10:07:09 +0000187 defined(CONFIG_AM33XX) || defined(CONFIG_SOC_DA8XX) || \
TENART Antoine9ed6e412013-07-02 12:05:58 +0200188 defined(CONFIG_TI81XX) || defined(CONFIG_AM43XX)
Chandan Nath5289e832011-10-14 02:58:26 +0000189
Simon Glassf8df9d02011-10-15 19:14:09 +0000190 /* /16 is proper to hit 115200 with 48MHz */
191 serial_out(0, &com_port->mdr1);
Mike Frysingerb4746d82009-02-11 20:26:52 -0500192#endif /* CONFIG_OMAP */
Khoronzhuk, Ivan7c387642014-07-16 00:59:25 +0300193#if defined(CONFIG_SOC_KEYSTONE)
Vitaly Andrianovef509b92014-04-04 13:16:53 -0400194 serial_out(UART_REG_VAL_PWREMU_MGMT_UART_ENABLE, &com_port->regC);
195#endif
wdenke85390d2002-04-01 14:29:03 +0000196}
197
Ron Madridf5675aa2009-02-18 14:30:44 -0800198#ifndef CONFIG_NS16550_MIN_FUNCTIONS
Simon Glassf8df9d02011-10-15 19:14:09 +0000199void NS16550_reinit(NS16550_t com_port, int baud_divisor)
wdenke85390d2002-04-01 14:29:03 +0000200{
Prafulla Wadaskara160ea02010-10-27 21:58:31 +0530201 serial_out(CONFIG_SYS_NS16550_IER, &com_port->ier);
Simon Glass8bbe33c2014-09-04 16:27:33 -0600202 NS16550_setbrg(com_port, 0);
Graeme Russ167cdad2010-04-24 00:05:46 +1000203 serial_out(UART_MCRVAL, &com_port->mcr);
Marek Vasut65f83802016-12-01 02:06:29 +0100204 serial_out(ns16550_getfcr(com_port), &com_port->fcr);
Simon Glass8bbe33c2014-09-04 16:27:33 -0600205 NS16550_setbrg(com_port, baud_divisor);
wdenke85390d2002-04-01 14:29:03 +0000206}
Ron Madridf5675aa2009-02-18 14:30:44 -0800207#endif /* CONFIG_NS16550_MIN_FUNCTIONS */
wdenke85390d2002-04-01 14:29:03 +0000208
Simon Glassf8df9d02011-10-15 19:14:09 +0000209void NS16550_putc(NS16550_t com_port, char c)
wdenke85390d2002-04-01 14:29:03 +0000210{
Simon Glassf8df9d02011-10-15 19:14:09 +0000211 while ((serial_in(&com_port->lsr) & UART_LSR_THRE) == 0)
212 ;
Graeme Russ167cdad2010-04-24 00:05:46 +1000213 serial_out(c, &com_port->thr);
Stefan Roese1a2d9b32010-10-12 09:39:45 +0200214
215 /*
216 * Call watchdog_reset() upon newline. This is done here in putc
217 * since the environment code uses a single puts() to print the complete
218 * environment upon "printenv". So we can't put this watchdog call
219 * in puts().
220 */
221 if (c == '\n')
222 WATCHDOG_RESET();
wdenke85390d2002-04-01 14:29:03 +0000223}
224
Ron Madridf5675aa2009-02-18 14:30:44 -0800225#ifndef CONFIG_NS16550_MIN_FUNCTIONS
Simon Glassf8df9d02011-10-15 19:14:09 +0000226char NS16550_getc(NS16550_t com_port)
wdenke85390d2002-04-01 14:29:03 +0000227{
Graeme Russ167cdad2010-04-24 00:05:46 +1000228 while ((serial_in(&com_port->lsr) & UART_LSR_DR) == 0) {
Marek Vasutf2041382012-09-15 10:25:19 +0200229#if !defined(CONFIG_SPL_BUILD) && defined(CONFIG_USB_TTY)
wdenk232c1502004-03-12 00:14:09 +0000230 extern void usbtty_poll(void);
231 usbtty_poll();
232#endif
Ladislav Michla1b322a2010-02-01 23:34:25 +0100233 WATCHDOG_RESET();
wdenk232c1502004-03-12 00:14:09 +0000234 }
Graeme Russ167cdad2010-04-24 00:05:46 +1000235 return serial_in(&com_port->rbr);
wdenke85390d2002-04-01 14:29:03 +0000236}
237
Simon Glassf8df9d02011-10-15 19:14:09 +0000238int NS16550_tstc(NS16550_t com_port)
wdenke85390d2002-04-01 14:29:03 +0000239{
Simon Glassf8df9d02011-10-15 19:14:09 +0000240 return (serial_in(&com_port->lsr) & UART_LSR_DR) != 0;
wdenke85390d2002-04-01 14:29:03 +0000241}
242
Ron Madridf5675aa2009-02-18 14:30:44 -0800243#endif /* CONFIG_NS16550_MIN_FUNCTIONS */
Simon Glass12e431b2014-09-04 16:27:34 -0600244
Simon Glass21d00432015-01-26 18:27:09 -0700245#ifdef CONFIG_DEBUG_UART_NS16550
246
247#include <debug_uart.h>
248
Simon Glass6e780c72015-06-23 15:39:06 -0600249#define serial_dout(reg, value) \
250 serial_out_shift((char *)com_port + \
251 ((char *)reg - (char *)com_port) * \
252 (1 << CONFIG_DEBUG_UART_SHIFT), \
253 CONFIG_DEBUG_UART_SHIFT, value)
254#define serial_din(reg) \
255 serial_in_shift((char *)com_port + \
256 ((char *)reg - (char *)com_port) * \
257 (1 << CONFIG_DEBUG_UART_SHIFT), \
258 CONFIG_DEBUG_UART_SHIFT)
259
Simon Glass97b05972015-10-18 19:51:23 -0600260static inline void _debug_uart_init(void)
Simon Glass21d00432015-01-26 18:27:09 -0700261{
262 struct NS16550 *com_port = (struct NS16550 *)CONFIG_DEBUG_UART_BASE;
263 int baud_divisor;
264
265 /*
266 * We copy the code from above because it is already horribly messy.
267 * Trying to refactor to nicely remove the duplication doesn't seem
268 * feasible. The better fix is to move all users of this driver to
269 * driver model.
270 */
Marek Vasut03c6f172016-05-25 02:13:16 +0200271 baud_divisor = ns16550_calc_divisor(com_port, CONFIG_DEBUG_UART_CLOCK,
272 CONFIG_BAUDRATE);
Simon Glass6e780c72015-06-23 15:39:06 -0600273 serial_dout(&com_port->ier, CONFIG_SYS_NS16550_IER);
274 serial_dout(&com_port->mcr, UART_MCRVAL);
Heiko Schocher17fa0322017-01-18 08:05:49 +0100275 serial_dout(&com_port->fcr, UART_FCR_DEFVAL);
Simon Glass21d00432015-01-26 18:27:09 -0700276
Simon Glass6e780c72015-06-23 15:39:06 -0600277 serial_dout(&com_port->lcr, UART_LCR_BKSE | UART_LCRVAL);
278 serial_dout(&com_port->dll, baud_divisor & 0xff);
279 serial_dout(&com_port->dlm, (baud_divisor >> 8) & 0xff);
280 serial_dout(&com_port->lcr, UART_LCRVAL);
Simon Glass21d00432015-01-26 18:27:09 -0700281}
282
283static inline void _debug_uart_putc(int ch)
284{
285 struct NS16550 *com_port = (struct NS16550 *)CONFIG_DEBUG_UART_BASE;
286
Simon Glass6e780c72015-06-23 15:39:06 -0600287 while (!(serial_din(&com_port->lsr) & UART_LSR_THRE))
Simon Glass21d00432015-01-26 18:27:09 -0700288 ;
Simon Glass6e780c72015-06-23 15:39:06 -0600289 serial_dout(&com_port->thr, ch);
Simon Glass21d00432015-01-26 18:27:09 -0700290}
291
292DEBUG_UART_FUNCS
293
294#endif
295
Simon Glass12e431b2014-09-04 16:27:34 -0600296#ifdef CONFIG_DM_SERIAL
297static int ns16550_serial_putc(struct udevice *dev, const char ch)
298{
299 struct NS16550 *const com_port = dev_get_priv(dev);
300
301 if (!(serial_in(&com_port->lsr) & UART_LSR_THRE))
302 return -EAGAIN;
303 serial_out(ch, &com_port->thr);
304
305 /*
306 * Call watchdog_reset() upon newline. This is done here in putc
307 * since the environment code uses a single puts() to print the complete
308 * environment upon "printenv". So we can't put this watchdog call
309 * in puts().
310 */
311 if (ch == '\n')
312 WATCHDOG_RESET();
313
314 return 0;
315}
316
317static int ns16550_serial_pending(struct udevice *dev, bool input)
318{
319 struct NS16550 *const com_port = dev_get_priv(dev);
320
321 if (input)
322 return serial_in(&com_port->lsr) & UART_LSR_DR ? 1 : 0;
323 else
324 return serial_in(&com_port->lsr) & UART_LSR_THRE ? 0 : 1;
325}
326
327static int ns16550_serial_getc(struct udevice *dev)
328{
329 struct NS16550 *const com_port = dev_get_priv(dev);
330
Simon Glassaea2be22014-10-22 21:37:03 -0600331 if (!(serial_in(&com_port->lsr) & UART_LSR_DR))
Simon Glass12e431b2014-09-04 16:27:34 -0600332 return -EAGAIN;
333
334 return serial_in(&com_port->rbr);
335}
336
337static int ns16550_serial_setbrg(struct udevice *dev, int baudrate)
338{
339 struct NS16550 *const com_port = dev_get_priv(dev);
340 struct ns16550_platdata *plat = com_port->plat;
341 int clock_divisor;
342
343 clock_divisor = ns16550_calc_divisor(com_port, plat->clock, baudrate);
344
345 NS16550_setbrg(com_port, clock_divisor);
346
347 return 0;
348}
349
350int ns16550_serial_probe(struct udevice *dev)
351{
352 struct NS16550 *const com_port = dev_get_priv(dev);
353
Simon Glass11c1a872014-10-22 21:37:05 -0600354 com_port->plat = dev_get_platdata(dev);
Simon Glass12e431b2014-09-04 16:27:34 -0600355 NS16550_init(com_port, -1);
356
357 return 0;
358}
359
Marek Vasut79fd9282016-12-01 02:06:30 +0100360#if CONFIG_IS_ENABLED(OF_CONTROL)
361enum {
362 PORT_NS16550 = 0,
Marek Vasut0b060ee2016-12-01 02:06:31 +0100363 PORT_JZ4780,
Marek Vasut79fd9282016-12-01 02:06:30 +0100364};
365#endif
366
Simon Glassb2927fb2016-07-04 11:58:23 -0600367#if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)
Simon Glass12e431b2014-09-04 16:27:34 -0600368int ns16550_serial_ofdata_to_platdata(struct udevice *dev)
369{
Simon Glass12e431b2014-09-04 16:27:34 -0600370 struct ns16550_platdata *plat = dev->platdata;
Marek Vasut0b060ee2016-12-01 02:06:31 +0100371 const u32 port_type = dev_get_driver_data(dev);
Simon Glass12e431b2014-09-04 16:27:34 -0600372 fdt_addr_t addr;
Masahiro Yamada021abf62016-09-26 20:45:27 +0900373 struct clk clk;
374 int err;
Simon Glass12e431b2014-09-04 16:27:34 -0600375
Bin Meng3db886a2014-12-31 16:05:12 +0800376 /* try Processor Local Bus device first */
Simon Glass4e9838c2015-08-11 08:33:29 -0600377 addr = dev_get_addr(dev);
Simon Glassfcc0a872015-11-29 13:17:54 -0700378#if defined(CONFIG_PCI) && defined(CONFIG_DM_PCI)
Bin Meng3db886a2014-12-31 16:05:12 +0800379 if (addr == FDT_ADDR_T_NONE) {
380 /* then try pci device */
381 struct fdt_pci_addr pci_addr;
382 u32 bar;
383 int ret;
384
385 /* we prefer to use a memory-mapped register */
386 ret = fdtdec_get_pci_addr(gd->fdt_blob, dev->of_offset,
387 FDT_PCI_SPACE_MEM32, "reg",
388 &pci_addr);
389 if (ret) {
390 /* try if there is any i/o-mapped register */
391 ret = fdtdec_get_pci_addr(gd->fdt_blob,
392 dev->of_offset,
393 FDT_PCI_SPACE_IO,
394 "reg", &pci_addr);
395 if (ret)
396 return ret;
397 }
398
Simon Glassfcc0a872015-11-29 13:17:54 -0700399 ret = fdtdec_get_pci_bar32(dev, &pci_addr, &bar);
Bin Meng3db886a2014-12-31 16:05:12 +0800400 if (ret)
401 return ret;
402
403 addr = bar;
404 }
405#endif
406
Simon Glass12e431b2014-09-04 16:27:34 -0600407 if (addr == FDT_ADDR_T_NONE)
408 return -EINVAL;
409
Paul Burtondf8ec552016-05-17 07:43:26 +0100410#ifdef CONFIG_SYS_NS16550_PORT_MAPPED
Simon Glass167efe02014-10-22 21:37:04 -0600411 plat->base = addr;
Paul Burtondf8ec552016-05-17 07:43:26 +0100412#else
413 plat->base = (unsigned long)map_physmem(addr, 0, MAP_NOCACHE);
414#endif
415
Michal Simek59b35dd2016-02-16 16:17:49 +0100416 plat->reg_offset = fdtdec_get_int(gd->fdt_blob, dev->of_offset,
417 "reg-offset", 0);
Simon Glass12e431b2014-09-04 16:27:34 -0600418 plat->reg_shift = fdtdec_get_int(gd->fdt_blob, dev->of_offset,
Thomas Chou80e06142015-11-29 14:01:03 +0800419 "reg-shift", 0);
Paul Burton50fce1d2016-09-08 07:47:29 +0100420
421 err = clk_get_by_index(dev, 0, &clk);
422 if (!err) {
423 err = clk_get_rate(&clk);
424 if (!IS_ERR_VALUE(err))
425 plat->clock = err;
Alexandre Courbotab895d62016-09-30 17:37:00 +0900426 } else if (err != -ENOENT && err != -ENODEV && err != -ENOSYS) {
Paul Burton50fce1d2016-09-08 07:47:29 +0100427 debug("ns16550 failed to get clock\n");
428 return err;
429 }
430
431 if (!plat->clock)
432 plat->clock = fdtdec_get_int(gd->fdt_blob, dev->of_offset,
433 "clock-frequency",
434 CONFIG_SYS_NS16550_CLK);
Thomas Chou8e62d322015-11-19 21:48:05 +0800435 if (!plat->clock) {
436 debug("ns16550 clock not defined\n");
437 return -EINVAL;
438 }
Simon Glass12e431b2014-09-04 16:27:34 -0600439
Heiko Schocher17fa0322017-01-18 08:05:49 +0100440 plat->fcr = UART_FCR_DEFVAL;
Marek Vasut0b060ee2016-12-01 02:06:31 +0100441 if (port_type == PORT_JZ4780)
442 plat->fcr |= UART_FCR_UME;
Marek Vasut65f83802016-12-01 02:06:29 +0100443
Simon Glass12e431b2014-09-04 16:27:34 -0600444 return 0;
445}
Simon Glass11c1a872014-10-22 21:37:05 -0600446#endif
Simon Glass12e431b2014-09-04 16:27:34 -0600447
448const struct dm_serial_ops ns16550_serial_ops = {
449 .putc = ns16550_serial_putc,
450 .pending = ns16550_serial_pending,
451 .getc = ns16550_serial_getc,
452 .setbrg = ns16550_serial_setbrg,
453};
Thomas Chou8e62d322015-11-19 21:48:05 +0800454
Simon Glassb2927fb2016-07-04 11:58:23 -0600455#if !CONFIG_IS_ENABLED(OF_PLATDATA)
Thomas Chou8e62d322015-11-19 21:48:05 +0800456#if CONFIG_IS_ENABLED(OF_CONTROL)
Thomas Choucc4228f2015-12-14 20:45:09 +0800457/*
458 * Please consider existing compatible strings before adding a new
459 * one to keep this table compact. Or you may add a generic "ns16550"
460 * compatible string to your dts.
461 */
Thomas Chou8e62d322015-11-19 21:48:05 +0800462static const struct udevice_id ns16550_serial_ids[] = {
Marek Vasut79fd9282016-12-01 02:06:30 +0100463 { .compatible = "ns16550", .data = PORT_NS16550 },
464 { .compatible = "ns16550a", .data = PORT_NS16550 },
Marek Vasut0b060ee2016-12-01 02:06:31 +0100465 { .compatible = "ingenic,jz4780-uart", .data = PORT_JZ4780 },
Marek Vasut79fd9282016-12-01 02:06:30 +0100466 { .compatible = "nvidia,tegra20-uart", .data = PORT_NS16550 },
467 { .compatible = "snps,dw-apb-uart", .data = PORT_NS16550 },
468 { .compatible = "ti,omap2-uart", .data = PORT_NS16550 },
469 { .compatible = "ti,omap3-uart", .data = PORT_NS16550 },
470 { .compatible = "ti,omap4-uart", .data = PORT_NS16550 },
471 { .compatible = "ti,am3352-uart", .data = PORT_NS16550 },
472 { .compatible = "ti,am4372-uart", .data = PORT_NS16550 },
473 { .compatible = "ti,dra742-uart", .data = PORT_NS16550 },
Thomas Chou8e62d322015-11-19 21:48:05 +0800474 {}
475};
476#endif
477
Simon Glassb7e29832015-12-13 21:36:59 -0700478#if CONFIG_IS_ENABLED(SERIAL_PRESENT)
Thomas Chou8e62d322015-11-19 21:48:05 +0800479U_BOOT_DRIVER(ns16550_serial) = {
480 .name = "ns16550_serial",
481 .id = UCLASS_SERIAL,
482#if CONFIG_IS_ENABLED(OF_CONTROL)
483 .of_match = ns16550_serial_ids,
484 .ofdata_to_platdata = ns16550_serial_ofdata_to_platdata,
485 .platdata_auto_alloc_size = sizeof(struct ns16550_platdata),
486#endif
487 .priv_auto_alloc_size = sizeof(struct NS16550),
488 .probe = ns16550_serial_probe,
489 .ops = &ns16550_serial_ops,
Simon Glassb7e5a642015-12-04 08:58:38 -0700490 .flags = DM_FLAG_PRE_RELOC,
Thomas Chou8e62d322015-11-19 21:48:05 +0800491};
Simon Glassb7e29832015-12-13 21:36:59 -0700492#endif
Simon Glassb2927fb2016-07-04 11:58:23 -0600493#endif /* !OF_PLATDATA */
Simon Glass12e431b2014-09-04 16:27:34 -0600494#endif /* CONFIG_DM_SERIAL */